diff --git a/docs/revision_history.txt b/docs/revision_history.txt
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+                                            NetXDuo
+                                            
+For version 6 and higher, please refer to the release notes on GitHub at https://github.com/eclipse-threadx/netxduo/releases.
+Below is the revision history for 5.x.
+
+1. NetXDuo
+
+08-15-2019  NetX Duo generic code version 5.12. This release includes the
+            following major features:
+
+        Files are modified to fix window size overflow:
+            nx_tcp_packet_send_control.c
+            nx_tcp_socket_retransmit.c
+            nx_tcp_socket_send_internal.c
+
+        Files are modified to improve string length verification:
+            demo_netx_duo_multihome_tcp.c
+            demo_netx_duo_multihome_udp.c
+            demo_netx_duo_tcp.c
+            demo_netx_duo_udp.c
+            nx_api.h
+            nx_user.h
+
+        Files are modified to improve RARP logic:
+            nx_rarp_enable.c
+            nx_rarp_periodic_update.c
+            nx_rarp_packet_receive.c
+
+        File is created to improve string length verification:
+            nx_utility.c
+
+        Files are modified to fix compiler warnings:
+            nx_ip_checksum_compute.c
+            nxd_ipv6_default_router_entry_get.c
+
+        Files are modified to fix system state check:
+            nx_api.h
+            nx_icmp_packet_receive.c
+            nx_igmp_packet_receive.c
+            nx_tcp_client_bind_cleanup.c
+            nx_tcp_connect_cleanup.c
+            nx_tcp_disconnect_cleanup.c
+            nx_tcp_packet_receive.c
+            nx_tcp_receive_cleanup.c
+            nx_tcp_transmit_cleanup.c
+            nx_udp_packet_receive.c
+
+        Files are modified to improve packet length verification:
+            nx_arp_announce_send.c
+            nx_arp_packet_receive.c
+            nx_arp_packet_send.c
+            nx_arp_probe_send.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+            nx_igmp_interface_report_send.c
+            nx_rarp_packet_receive.c
+            nx_rarp_packet_send.c
+            nx_tcp_packet_send_control.c
+            nx_udp_packet_receive.c
+
+        Files are modified to support for 64-bit mode:
+            nx_api.h
+            nx_arp_queue_send.c
+            nx_icmp_interface_ping.c
+            nx_icmp_interface_ping6.c
+            nx_icmpv4_process_echo_reply.c
+            nx_icmpv4_send_error_message.c
+            nx_icmpv6_destination_table_periodic_update.c
+            nx_icmpv6_process_echo_reply.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_queued_packets.c
+            nx_icmpv6_send_rs.c
+            nx_icmpv6_validate_neighbor_message.c
+            nx_icmpv6_validate_options.c
+            nx_icmpv6_validate_ra.c
+            nx_igmp_packet_process.c
+            nx_ip_checksum_compute.c
+            nx_ip_create.c
+            nx_ip_dispatch_process.c
+            nx_ip_driver_packet_send.c
+            nx_ip_fast_periodic_timer_entry.c
+            nx_ip_fragment_assembly.c
+            nx_ip_fragment_forward_packet.c
+            nx_ip_fragment_packet.c
+            nx_ip_header_add.c
+            nx_ip_packet_checksum_compute.c
+            nx_ip_packet_send.c
+            nx_ip_periodic_timer_entry.c
+            nx_ip_thread_entry.c
+            nx_ipv4_option_process.c
+            nx_ipv4_packet_receive.c
+            nx_ipv6_fragment_process.c
+            nx_ipv6_header_add.c
+            nx_ipv6_option_error.c
+            nx_ipv6_packet_receive.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_process_hop_by_hop_option.c
+            nx_packet.h
+            nx_packet_data_adjust.c
+            nx_packet_debug_info_get.c
+            nx_packet_pool_create.c
+            nx_tcp_no_connection_reset.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_control.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_server_socket_relisten.c
+            nx_tcp_socket_packet_process.c
+            nx_tcp_socket_receive.c
+            nx_tcp_socket_retransmit.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_data_check.c
+            nx_udp_packet_receive.c
+            nx_udp_socket_bytes_available.c
+            nx_udp_socket_receive.c
+            nxd_ipv6_disable.c
+            nxd_udp_socket_send.c
+            nxde_icmp_ping.c
+            nxde_icmp_source_ping.c
+            nxe_packet_pool_create.c
+
+        Other modified files:
+            demo_netx_duo_multihome_udp.c                     Fixed packet leak when IPv4 disabled.
+            nx_arp_packet_receive.c                           Fixed the ARP update on static entries.
+            nx_ip_checksum_compute.c                          Fixed alignment issue.
+            nx_ip_delete.c                                    Allowed driver uninit to execute without preemption disabled.
+            nx_ip_dispatch_process.c                          Supported packet pool low watermark.
+            nx_ipv4_option_process.c                          Improved internal logic.
+            nx_ipv4_packet_receive.c                          Corrected the logic for checking DHCP message.
+            nx_ipv4_packet_receive.c                          Supported packet pool low watermark.
+            nxd_tcp_client_socket_connect.c                   Fixed a packet leak issue for TCP client.
+            nx_tcp_packet_process.c                           Fixed connection MSS.
+                                                              Validated option after SEQ and ACK are checked.
+            nx_tcp_socket_packet_process.c                    Validated option after SEQ and ACK are checked.
+            nx_tcp_packet_send_syn.c                          Fixed connection MSS.
+
+
+07/15/2018  NetX Duo generic code version 5.11. This release includes the
+            following major features:
+
+        Files are modified to fix custom MSS value:
+            nx_api.h
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_server_socket_relisten.c
+            nx_tcp_socket_mss_get.c
+            nx_tcp_socket_mss_set.c
+            nx_tcp_socket_send_internal.c
+
+        Files are modified to improve packet length verification:
+            nx_icmpv6_process_echo_reply.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_packet_too_big.c
+            nx_icmpv6_validate_options.c
+            nx_ip_dispatch_process.c
+            nx_ipv4_packet_receive.c
+            nx_ipv6_packet_receive.c
+            nx_ipv6_process_hop_by_hop_option.c
+            nx_tcp_packet_process.c
+
+        Files are modified to support Thread feature:
+            nx_api.h
+            nx_ipv6_process_hop_by_hop_option.c
+            nx_ipv6_util.c
+            nx_packet_allocate.c
+
+        Files are modified to check interface for router lookup:
+            nx_icmpv6_process_redirect.c
+            nx_ipv6.h
+            nx_ipv6_packet_send.c
+            nxd_ipv6_router_lookup.c
+
+        Files are modified to fix the logic to update the destination cache:
+            nx_icmpv6.h
+            nx_icmpv6_dest_table_add.c
+            nx_icmpv6_dest_table_find.c
+            nx_icmpv6_process_packet_too_big.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_queued_packets.c
+            nx_ipv6_packet_send.c
+
+        Files are modified to support specified source interface for IPv6:
+            nx_icmp_ping6.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_rs.c
+            nx_ipv6.h
+            nxd_ipv6_interface_find.c
+            nxd_tcp_client_socket_connect.c
+            nxd_udp_socket_send.c
+
+        Files are modified to improve internal logic:
+            nx_api.h
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_send_error_message.c
+            nx_ip_create.c
+            nx_ip_dispatch_process.c
+            nx_ip_fragment_assembly.c
+            nx_ip_fragment_timeout_check.c
+            nx_ip_header_add.c
+            nx_ip_interface_attach.c
+            nx_ip_interface_physical_address_set.c
+            nx_ip_max_payload_size_find.c
+            nx_ipv4_option_process.c
+            nx_ipv6_header_add.c
+            nx_ipv6_option_error.c
+            nx_ipv6_packet_copy.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_util.c
+            nx_packet_allocate.c
+            nx_packet_release.c
+            nx_packet_transmit_release.c
+            nx_ram_network_driver.c
+            nx_tcp_client_socket_bind.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_control.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_server_socket_accept.c
+            nx_tcp_socket_disconnect.c
+            nx_tcp_socket_retransmit.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_data_check.c
+            nx_udp_socket_bind.c
+            nx_udp_socket_receive.c
+            nxd_ipv6_default_router_delete.c
+            nxd_ipv6_interface_find.c
+            nxd_ipv6_search_onlink.c
+            nxd_tcp_client_socket_connect.c
+            nxd_udp_socket_send.c
+
+        Files are modified to merge IPv6 loopback address with normal IPv6 address:
+            nx_api.h
+            nx_ip_create.c
+            nx_ip_max_payload_size_find.c
+            nxd_ipv6_disable.c
+            nxde_icmp_source_ping.c
+            nxde_ip_raw_packet_source_send.c
+            nxde_ipv6_address_get.c
+            nxde_udp_socket_source_send.c
+
+        Files are modified to use macro to bring in symbol: _tx_thread_system_state:
+            nxe_ip_forwarding_disable.c
+            nxe_ip_forwarding_enable.c
+            nxe_packet_pool_info_get.c
+            nxe_tcp_enable.c
+            nxe_tcp_socket_receive_queue_max_set.c
+            nxe_udp_enable.c
+            nxe_udp_info_get.c
+            nxe_udp_socket_checksum_disable.c
+            nxe_udp_socket_checksum_enable.c
+            nxe_udp_socket_info_get.c
+
+        Files are modified to remove unreachable code:
+            nx_tcp_socket_receive.c
+            nx_ipv6_packet_send.c
+
+        Files are modified to be compatible with ThreadX 5.8 or later:
+            nx_api.h
+            nx_icmp_cleanup.c
+            nx_icmpv4.h
+            nx_ip.h
+            nx_ip_delete.c
+            nx_ip_raw_packet_cleanup.c
+            nx_ip_raw_packet_disable.c
+            nx_packet.h
+            nx_packet_pool_cleanup.c
+            nx_tcp.h
+            nx_tcp_cleanup_deferred.c
+            nx_tcp_client_bind_cleanup.c
+            nx_tcp_client_socket_unbind.c
+            nx_tcp_connect_cleanup.c
+            nx_tcp_deferred_cleanup_check.c
+            nx_tcp_disconnect_cleanup.c
+            nx_tcp_receive_cleanup.c
+            nx_tcp_server_socket_unaccept.c
+            nx_tcp_socket_connection_reset.c
+            nx_tcp_socket_disconnect.c
+            nx_tcp_socket_state_established.c
+            nx_tcp_socket_thread_suspend.c
+            nx_tcp_transmit_cleanup.c
+            nx_udp.h
+            nx_udp_bind_cleanup.c
+            nx_udp_receive_cleanup.c
+            nx_udp_socket_unbind.c
+
+        Files are modified to support random port find:
+            nx_api.h
+            nx_tcp_client_socket_bind.c
+            nx_tcp_enable.c
+            nx_tcp_free_port_find.c
+            nx_udp_enable.c
+            nx_udp_free_port_find.c
+            nx_udp_socket_bind.c
+
+        Files are modified to fix compiler errors when event trace is enabled:
+            nx_icmpv4_packet_process.c
+            nx_ip_create.c
+            nx_ip_forwarding_disable.c
+            nx_ip_forwarding_enable.c
+            nx_ip_fragment_enable.c
+            nx_ip_max_payload_size_find.c
+            nx_ip_raw_packet_filter_set.c
+            nx_ip_raw_packet_receive.c
+            nx_ip_static_route_add.c
+            nx_ip_static_route_delete.c
+            nx_packet_allocate.c
+            nx_rarp_disable.c
+            nx_rarp_enable.c
+            nx_rarp_info_get.c
+            nx_tcp.h
+            nx_tcp_connect_cleanup.c
+            nx_tcp_socket_block_cleanup.c
+            nx_tcp_socket_packet_process.c
+            nx_tcp_socket_receive_notify.c
+            nx_tcp_socket_state_syn_sent.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_window_update_notify_set.c
+            nx_trace_object_unregister.c
+            nx_trace_object_register.c
+            nx_udp_info_get.c
+            nx_udp_socket_checksum_disable.c
+            nx_udp_socket_checksum_enable.c
+            nx_udp_socket_info_get.c
+            nx_udp_socket_port_get.c
+            nxd_ipv6_address_change_notify.c
+            nxd_ipv6_stateless_address_autoconfig_enable.c
+            nxd_ipv6_stateless_address_autoconfig_disable.c
+            nxd_udp_socket_send.c
+
+        Files are modified to avoid NULL pointer access in trace logging:
+            nx_ip_interface_info_get.c
+            nx_ip_thread_entry.c
+            nxd_ipv6_address_set.c
+            nxd_udp_packet_info_extract.c
+
+        Files are modified to fix the delay of initial router solicitation:
+            nx_icmpv6.h
+            nx_icmpv6_send_rs.c
+            nx_user.h
+            nxd_ipv6_enable.c
+            nxd_ipv6_router_solicitation_check.c
+            nxd_ipv6_stateless_address_autoconfig_enable.c
+
+        Files are modified to move the destination and ND cache tables to IP structure:
+            nx_api.h
+            nx_icmpv6.h
+            nx_icmpv6_DAD_clear_NDCache_entry.c
+            nx_icmpv6_dest_table_add.c
+            nx_icmpv6_dest_table_find.c
+            nx_icmpv6_destination_table_periodic_update.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_queued_packets.c
+            nx_ip_thread_entry.c
+            nx_ipv6_packet_send.c
+            nx_invalidate_destination_entry.c
+            nx_nd_cache.h
+            nx_nd_cache_add.c
+            nx_nd_cache_add_entry.c
+            nx_nd_cache_delete_internal.c
+            nx_nd_cache_fast_periodic_update.c
+            nx_nd_cache_find_entry.c
+            nx_nd_cache_find_entry_by_mac_addr.c
+            nx_nd_cache_interface_entries_delete.c
+            nx_nd_cache_slow_periodic_update.c
+            nx_system_initialize.c
+            nxd_icmp_enable.c
+            nxd_ipv6_destination_table_find_next_hop.c
+            nxd_ipv6_disable.c
+            nxd_ipv6_prefix_router_timer_tick.c
+            nxd_nd_cache_entry_delete.c
+            nxd_nd_cache_hardware_address_find.c
+            nxd_nd_cache_invalidate.c
+            nxd_nd_cache_ip_address_find.c
+
+        Files are modified to add support for disabling IPv4:
+            demo_netx_duo_multihome_tcp.c
+            demo_netx_duo_multihome_udp.c
+            demo_netx_duo_tcp.c
+            demo_netx_duo_udp.c
+            nx_api.h
+            nx_arp.h
+            nx_arp_announce_send.c
+            nx_arp_dynamic_entries_invalidate.c
+            nx_arp_dynamic_entry_delete.c
+            nx_arp_dynamic_entry_set.c
+            nx_arp_enable.c
+            nx_arp_entry_allocate.c
+            nx_arp_entry_delete.c
+            nx_arp_gratuitous_send.c
+            nx_arp_hardware_address_find.c
+            nx_arp_info_get.c
+            nx_arp_initialize.c
+            nx_arp_interface_entries_delete.c
+            nx_arp_ip_address_find.c
+            nx_arp_packet_deferred_receive.c
+            nx_arp_packet_receive.c
+            nx_arp_packet_send.c
+            nx_arp_periodic_update.c
+            nx_arp_probe_send.c
+            nx_arp_queue_process.c
+            nx_arp_queue_send.c
+            nx_arp_static_entries_delete.c
+            nx_arp_static_entry_create.c
+            nx_arp_static_entry_delete.c
+            nx_arp_static_entry_delete_internal.c
+            nx_icmp.h
+            nx_icmp_enable.c
+            nx_icmp_interface_ping.c
+            nx_icmp_packet_process.c
+            nx_icmp_packet_receive.c
+            nx_icmp_ping.c
+            nx_icmp_queue_process.c
+            nx_icmpv4.h
+            nx_icmpv4_packet_process.c
+            nx_icmpv4_process_echo_reply.c
+            nx_icmpv4_process_echo_request.c
+            nx_icmpv4_send_error_message.c
+            nx_igmp.h
+            nx_igmp_enable.c
+            nx_igmp_info_get.c
+            nx_igmp_loopback_disable.c
+            nx_igmp_loopback_enable.c
+            nx_igmp_multicast_check.c
+            nx_igmp_multicast_interface_join.c
+            nx_igmp_multicast_interface_join_internal.c
+            nx_igmp_multicast_interface_leave.c
+            nx_igmp_multicast_interface_leave_internal.c
+            nx_igmp_multicast_join.c
+            nx_igmp_multicast_leave.c
+            nx_igmp_packet_process.c
+            nx_igmp_packet_receive.c
+            nx_igmp_periodic_processing.c
+            nx_igmp_queue_process.c
+            nx_ip.h
+            nx_ip_address_change_notify.c
+            nx_ip_address_get.c
+            nx_ip_address_set.c
+            nx_ip_create.c
+            nx_ip_delete.c
+            nx_ip_dispatch_process.c
+            nx_ip_driver_packet_send.c
+            nx_ip_forward_packet_process.c
+            nx_ip_forwarding_disable.c
+            nx_ip_forwarding_enable.c
+            nx_ip_fragment_assembly.c
+            nx_ip_fragment_forward_packet.c
+            nx_ip_fragment_packet.c
+            nx_ip_fragment_timeout_check.c
+            nx_ip_gateway_address_clear.c
+            nx_ip_gateway_address_get.c
+            nx_ip_gateway_address_set.c
+            nx_ip_header_add.c
+            nx_ip_interface_address_get.c
+            nx_ip_interface_address_set.c
+            nx_ip_interface_attach.c
+            nx_ip_interface_detach.c
+            nx_ip_interface_info_get.c
+            nx_ip_interface_status_check.c
+            nx_ip_max_payload_size_find.c
+            nx_ip_packet_receive.c
+            nx_ip_packet_send.c
+            nx_ip_raw_packet_send.c
+            nx_ip_raw_packet_source_send.c
+            nx_ip_route_find.c
+            nx_ip_static_route_add.c
+            nx_ip_static_route_delete.c
+            nx_ip_thread_entry.c
+            nx_ipv4.h
+            nx_ipv4_multicast_interface_join.c
+            nx_ipv4_multicast_interface_leave.c
+            nx_ipv4_option_process.c
+            nx_ipv4_packet_receive.c
+            nx_packet_allocate.c
+            nx_ram_network_driver.c
+            nx_rarp.h
+            nx_rarp_disable.c
+            nx_rarp_enable.c
+            nx_rarp_info_get.c
+            nx_rarp_packet_deferred_receive.c
+            nx_rarp_packet_receive.c
+            nx_rarp_packet_send.c
+            nx_rarp_periodic_update.c
+            nx_rarp_queue_process.c
+            nx_tcp_client_socket_connect.c
+            nx_tcp_no_connection_reset.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_control.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_server_socket_relisten.c
+            nx_tcp_server_socket_unaccept.c
+            nx_tcp_socket_block_cleanup.c
+            nx_tcp_socket_mss_set.c
+            nx_tcp_socket_peer_info_get.c
+            nx_tcp_socket_retransmit.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+            nx_udp_packet_info_extract.c
+            nx_udp_packet_receive.c
+            nx_udp_socket_receive.c
+            nx_udp_socket_send.c
+            nx_udp_source_extract.c
+            nx_user.h
+            nxd_icmp_enable.c
+            nxd_icmp_ping.c
+            nxd_icmp_source_ping.c
+            nxd_ip_raw_packet_source_send.c
+            nxd_tcp_client_socket_connect.c
+            nxd_tcp_socket_peer_info_get.c
+            nxd_udp_packet_info_extract.c
+            nxd_udp_socket_send.c
+            nxd_udp_socket_source_send.c
+            nxd_udp_source_extract.c
+            nxde_icmp_ping.c
+            nxde_icmp_source_ping.c
+            nxde_ip_raw_packet_send.c
+            nxde_ip_raw_packet_source_send.c
+            nxde_tcp_client_socket_connect.c
+            nxde_udp_socket_send.c
+            nxde_udp_socket_source_send.c
+            nxe_arp_dynamic_entries_invalidate.c
+            nxe_arp_dynamic_entry_set.c
+            nxe_arp_enable.c
+            nxe_arp_entry_delete.c
+            nxe_arp_gratuitous_send.c
+            nxe_arp_hardware_address_find.c
+            nxe_arp_info_get.c
+            nxe_arp_ip_address_find.c
+            nxe_arp_static_entries_delete.c
+            nxe_arp_static_entry_create.c
+            nxe_arp_static_entry_delete.c
+            nxe_icmp_enable.c
+            nxe_icmp_ping.c
+            nxe_igmp_enable.c
+            nxe_igmp_info_get.c
+            nxe_igmp_loopback_disable.c
+            nxe_igmp_loopback_enable.c
+            nxe_igmp_multicast_interface_join.c
+            nxe_igmp_multicast_interface_leave.c
+            nxe_igmp_multicast_join.c
+            nxe_igmp_multicast_leave.c
+            nxe_ip_address_change_notify.c
+            nxe_ip_address_get.c
+            nxe_ip_address_set.c
+            nxe_ip_forwarding_disable.c
+            nxe_ip_forwarding_enable.c
+            nxe_ip_gateway_address_clear.c
+            nxe_ip_gateway_address_get.c
+            nxe_ip_gateway_address_set.c
+            nxe_ip_interface_address_get.c
+            nxe_ip_interface_address_set.c
+            nxe_ip_interface_status_check.c
+            nxe_ip_raw_packet_send.c
+            nxe_ip_raw_packet_source_send.c
+            nxe_ip_static_route_add.c
+            nxe_ip_static_route_delete.c
+            nxe_ipv4_multicast_interface_join.c
+            nxe_ipv4_multicast_interface_leave.c
+            nxe_rarp_disable.c
+            nxe_rarp_enable.c
+            nxe_rarp_info_get.c
+            nxe_tcp_client_socket_connect.c
+            nxe_tcp_socket_peer_info_get.c
+            nxe_tcp_socket_send.c
+            nxe_udp_packet_info_extract.c
+            nxe_udp_socket_send.c
+            nxe_udp_socket_source_send.c
+            nxe_udp_source_extract.c
+
+        Other modified files:
+
+            nx_arp_packet_receive.c                           Added zero IP probe address check.
+            nx_arp_periodic_update.c                          Improved retry counter check logic.
+            nx_icmp_packet_receive.c                          Added logic for checking address of ICMP packet.
+            nx_icmpv6_process_echo_request.c                  Corrected the logic for processing multicast echo.
+            nx_igmp.h                                         Declared nx_igmp_interface_report_send function.
+            nx_igmp_multicast_interface_leave_internal.c      Optimized to use the report_send function.
+            nx_igmp_packet_process.c                          Fixed history information.
+            nx_igmp_periodic_processing.c                     Optimized to use the report_send function.
+            nx_ip_create.c                                    Fixed address index. The value is cleared by nxd_ipv6_disable.
+            nx_ip_forward_packet_process.c                    Added check for class D address.
+                                                                Corrected the logic for appending the overflowing data to the new packet.
+            nx_ip_interface_detach.c                          Optimized the logic for invalidating destination entries when the router is invalid.
+            nx_ipv6_fragment_process.c                        Fixed NULL pointer access.
+            nx_nd_cache.h                                     Cleaned up internal functions.
+            nx_nd_cache_clear_IsRouter_field.c                Removed unused function.
+            nx_nd_cache_init.c                                Removed unused function.
+            nx_packet.h                                       Adjusted the packet data to fill the specified header.
+            nx_packet_data_append.c                           Fixed NULL pointer access.
+            nx_tcp_client_socket_unbind.c                     Fixed a bug where packets in the receive queue may not be properly released.
+            nx_tcp_packet_process.c                           Fixed the packet leak.
+            nx_tcp_server_socket_accept.c                     Fixed an issue where SYN is sent multiple times.
+            nx_tcp_socket_retransmit.c                        Fixed compiler error when NX_DISABLE_TCP_TX_CHECKSUM is defined.
+            nx_tcp_socket_send_internal.c                     Fixed window size when receiving duplicated ACKs.
+                                                                Fixed empty packet.
+            nx_tcp_socket_state_ack_check.c                   Fixed ACK number check when zero window probe is ACKed.
+                                                                Fixed the condition to update window size.
+            nx_tcp_socket_state_transmit_check.c              Fixed window size when receiving duplicated ACKs.
+            nx_user.h                                         Added symbol for checking address of ICMP packet.
+            nxd_ipv6_default_router_delete.c                  Removed one line function _nx_nd_cache_clear_IsRouter_field().
+            nxd_ipv6_enable.c                                 Fixed address index. The value is cleared by nxd_ipv6_disable.
+            nxd_ipv6_prefix_router_timer_tick.c               Removed one line function _nx_nd_cache_clear_IsRouter_field().
+                                                                Optimized the logic for invalidating destination entries when the router is invalid.
+            nxd_nd_cache_invalidate.c                         Simplified the logic for invalidating all ND cache entries.
+            nxd_nd_cache_invalidate_internal.c                Removed unused function.
+            nxd_udp_socket_send.c                             Fixed compiler error when NX_DISABLE_UDP_TX_CHECKSUM is defined.
+            nxe_ip_create.c                                   Modified invalid IP address check.
+            nxe_ip_interface_attach.c                         Modified invalid IP address check.
+
+        File created:
+            nx_igmp_interface_report_send.c                   Created internal function for sending join and leave reports.
+            nx_packet_data_adjust.c                           Adjusted the packet data to fill the specified header.
+
+
+05/10/2016  NetX Duo generic code version 5.10. This release includes the
+            following major features:
+
+        Files are modified to add an argument to the parameter list of _nx_icmpv6_send_ns:
+            nx_icmpv6.h
+            nx_icmpv6_perform_DAD.c
+            nx_icmpv6_send_ns.c
+            nx_ip_thread_entry.c
+            nx_ipv6_packet_send.c
+            nx_nd_cache_fast_periodic_update.c
+
+        Files are modified to remove unused stub functions for trace:
+            nx_api.h
+            nx_trace_event_insert.c
+            nx_trace_event_update.c
+            nx_trace_object_register.c
+            nx_trace_object_unregister.c
+
+        Files are modified to fix IPv6 router type:
+            nx_api.h
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_ip.h
+            nxd_ipv6_default_router_add.c
+            nxd_ipv6_default_router_entry_get.c
+
+        Files are added or modified to avoid recursive call:
+            nx_icmpv6_send_ns.c
+            nx_ip_dispatch_process.c
+            nx_ipv6_header_add.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_process_fragment_option.c
+
+        Files are added or modified to remove unused IP pointer parameter:
+            nx_api.h
+            nx_icmpv6.h
+            nx_icmpv6_destination_table_periodic_update.c
+            nx_ip_thread_entry.c
+            nx_nd_cache.h
+            nx_nd_cache_add_entry.c
+            nx_nd_cache_delete_internal.c
+            nx_nd_cache_fast_periodic_update.c
+            nx_nd_cache_interface_entries_delete.c
+            nxd_ipv6_disable.c
+            nxd_nd_cache_entry_delete.c
+            nxd_nd_cache_invalidate.c
+            nxd_nd_cache_invalidate_internal.c
+
+        Files are added or modified to optimized the logic for IP address conflict detection:
+            nx_api.h
+            nx_arp.h
+            nx_arp_announce_send.c
+            nx_arp_gratuitous_send.c
+            nx_arp_packet_receive.c
+            nx_arp_probe_send.c
+
+        Files are modified to pass PC-Lint check:
+            nx_api.h
+            nx_icmpv4.h
+            nx_icmpv6.h
+            nx_ip_create.c
+            nx_ipv6.h
+            nx_nd_cache.h
+            nx_nd_cache_init.c
+
+        Files are modified to support ASSERT macro:
+            nx_arp_packet_send.c
+            nx_icmpv6_dest_table_find.c
+            nx_icmpv6_send_queued_packets.c
+            nx_ip_checksum_compute.c
+            nxd_ipv6_router_lookup.c
+            nxd_tcp_client_socket_connect.c
+
+        Files are modified to optimized the logic for TCP segment processing:
+            nx_tcp_socket_packet_process.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_syn_received.c
+            nx_tcp_socket_state_syn_sent.c
+
+        Files are modified to remove unreachable code and deprecated functions:
+            nx_api.h
+            nx_arp.h
+            nx_arp_entry_allocate.c
+            nx_icmp.h
+            nx_icmpv4.h
+            nx_icmpv6.h
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_queued_packets.c
+            nx_igmp.h
+            nx_ipv4.h
+            nx_ipv6.h
+            nx_ipv6_fragment_process.c
+            nx_ip_interface_detach.c
+            nx_nd_cache_find_entry_by_mac_addr.c
+            nx_packet.h
+            nx_tcp.h
+            nx_tcp_client_socket_bind.c
+            nx_tcp_packet_process.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_data_check.c
+            nx_tcp_socket_state_fin_wait1.c
+            nx_tcp_socket_state_syn_sent.c
+            nx_udp.h
+            nx_udp_socket_bind.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_router_lookup.c
+            nxd_ipv6_raw_packet_send_internal.c
+            nxd_tcp_client_socket_connect.c
+            nxde_udp_socket_send.c
+            nxde_icmp_source_ping.c
+
+        Files are modified to optimize the logic of checksum calculation:
+            nx_icmp_interface_ping.c
+            nx_icmp_interface_ping6.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv4_process_echo_request.c
+            nx_icmpv4_send_error_message.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+            nx_ip_checksum_compute.c
+            nx_ip_fragment_packet.c
+            nx_ip_header_add.c
+            nx_ipv4_packet_receive.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_control.c
+            nx_tcp_socket_send_internal.c
+            nx_udp_socket_receive.c
+            nxd_udp_socket_send.c
+
+        Files are modified to protect ND process in _nx_icmpv6_packet_process:
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+
+        Files are modified to avoid static analysis error report:
+            nx_ipv6_fragment_process.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_default_router_entry_get.c
+            nxd_ipv6_interface_find.c
+
+
+        Other modified files:
+            nx_api.h                                         Listed APIs by alphabetical order.
+                                                               Added return status NX_CONTINUE.
+                                                               Fixed typo of deprecated symbols.
+            nx_arp_entry_allocate.c                          Fixed a bug that is_static of arp entry was not set.
+            nx_arp_periodic_update.c                         Checked ARP expiration when NX_ARP_EXPIRATION_RATE is not zero.
+                                                               Optimized the logic of updating ARP list.
+            nx_arp_static_entries_delete.c                   Optimized the logic.
+            nx_icmp_interface_ping6.c                        Optimized the logic due to NX_ICMPV6_ECHO is modified.
+            nx_icmpv4_process_echo_reply.c                   Optimized the logic due to NX_ICMPV4_ECHO is modified.
+            nx_icmpv6_destination_table_periodic_update.c    Optimized the code.
+            nx_icmpv6_process_echo_reply.c                   Optimized the logic due to NX_ICMPV6_ECHO is modified.
+            nx_icmpv6_process_ra.c                           Fixed a bug that is_router of ND entry was not set.
+            nx_icmpv6_process_redirect.c                     Optimized the logic.
+                                                               The destination table is not updated when packet is invalid.
+            nx_icmpv6_send_ns.c                              Verified interface before is was used.
+            nx_icmpv6_send_queued_packets.c                  Optimized the logic for fragmentation checking.
+            nx_icmpv6_validate_neighbor_message.c            Fixed type check for destination address
+                                                               when source address is unspecified.
+            nx_igmp_multicast_interface_leave_internal       Fixed the bug for adding packet debug information.
+            nx_igmp_packet_process                           Added support for packet chaining.
+                                                               Compute the checksum over all IGMP data, not just the header.
+                                                               Modified the logic for checking packet length.
+            nx_igmp_periodic_processing                      Fixed the bug for adding packet debug information.
+            nx_ipv4.h                                        Avoided redundant definition of fragmentation symbols.
+            nx_ip_driver_packet_send.c                       Optimized the logic for fragmentation checking.
+            nx_ip_fast_periodic_timer_entry.c                Set function _nx_ip_fast_periodic_timer_entry to static.
+            nx_ip_forward_packet_process.c                   Fixed the bug for processing fragment bit.
+            nx_ip_interface_detach.c                         Checked interface status before processing.
+            nx_ip_route_find.c                               Fixed a bug that destination address is one of
+                                                               the local interface addresses.
+            nx_ipv4_option_process.c                         Optimized the code.
+            nx_ipv4_packet_receive.c                         Adjusted processing order to make sure interface has IP address before forwarding.
+            nx_ipv6_fragment_process.c                       Cleared reserved field in fragment option.
+            nx_ipv6_option_error.c                           Optimized the logic for default case of switch.
+            nx_ipv6_packet_send.c                            Optimized the logic for fragmentation checking.
+                                                               Removed unnecessary check.
+            nx_ipv6_perform_min_path_MTU_discovery.c         Moved the functionality into nx_icmpv6_destination_table_periodic_update.c
+            nx_packet_data_extract_offset.c                  Removed duplicated for zero packet length.
+            nx_system_initialize.c                           Make sure this service cannot invoked more than once.
+                                                               Created destination table MUTEX.
+            nx_tcp.h                                         Cleaned up the logic to get SYN packet size.
+            nx_user.h                                        Added NX_DISABLE_ICMPV4_ERROR_MESSAGE configuration option
+            nx_tcp_packet_process.c                          Fixed check for multicast source address.
+            nx_tcp_socket_delete.c                           Fixed socket state check.
+            nx_tcp_socket_disconnect.c                       Optimized the logic for checking wait_option.
+            nx_tcp_socket_receive.c                          Suspended the send request when the connection is in progress.
+            nx_tcp_socket_retransmit.c                       Fixed initial CWND value for fast recovery.
+            nx_tcp_socket_send_internal.c                    Fixed a bug that empty segment was sent when data append failed.
+                                                               Fixed a bug of endless loop in packet queue traverse.
+                                                               Fixed the alignment of chained packet.
+                                                               Suspended the send request when the connection is in progress.
+            nx_tcp_socket_state_ack_check.c                  Fixed the calculation of TCP payload when packet
+                                                               was not released by driver.
+                                                               Fixed the check for immediately retransmission.
+            nx_tcp_socket_state_data_check.c                 Fixed NULL pointer access.
+            nx_tcp_socket_state_syn_received.c               Optimized the logic for checking acknowledgment number.
+            nxd_icmp_ping.c                                  Removed duplicated error check.
+            nxd_icmp_source_ping.c                           Removed duplicated error check.
+            nxd_ipv6_disable.c                               Deleted ND cache added to current IP only.
+                                                               Protected ND cache process by mutex.
+            nxd_ipv6_interface_find.c                        Fixed a bug that destination address is one of
+                                                               the local IPv6 addresses.
+            nxd_tcp_client_socket_connect.c                  Cleaned up the logic to get SYN packet size.
+            nxde_ip_raw_packet_send.c                        Removed unnecessary check. The return value of
+                                                               _nxd_ip_raw_packet_source_send is always NX_SUCCESS.
+            nxe_ip_raw_packet_source_send.c                  Removed unnecessary check. The return value of
+                                                               _nx_ip_raw_packet_source_send is always NX_SUCCESS.
+
+
+02/22/2016  NetX Duo generic code version 5.9. This release includes the
+            following major features:
+
+        Files are modified to fix compiler warnings:
+            demo_netx_duo_multihome_tcp.c
+            demo_netx_duo_multihome_udp.c
+            demo_netx_duo_tcp.c
+            demo_netx_duo_udp.c
+            nx_api.h
+            nx_icmpv4_packet_process.c
+            nx_icmpv6_DAD_failure.c
+            nx_icmpv6_dest_table_add.c
+            nx_icmpv6_dest_table_find.c
+            nx_icmpv6_destination_table_periodic_update.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_echo_reply.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+            nx_ip_auxiliary_packet_pool_set.c
+            nx_ip_checksum_compute.c
+            nx_ip_dispatch_process.c
+            nx_ip_driver_deferred_enable.c
+            nx_ip_driver_deferred_receive.c
+            nx_ip_driver_packet_send.c
+            nx_ip_forward_packet_process.c
+            nx_ip_fragment_assembly.c
+            nx_ip_fragment_disable.c
+            nx_ip_fragment_enable.c
+            nx_ip_interface_capability_get.c
+            nx_ip_interface_capability_set.c
+            nx_ip_max_payload_size_find.c
+            nx_ip_packet_checksum_compute.c
+            nx_ip_packet_send.c
+            nx_ip_raw_packet_filter_set.c
+            nx_ip_raw_packet_processing.c
+            nx_ip_static_route_add.c
+            nx_ip_static_route_delete.c
+            nx_ipv6_fragment_process.c
+            nx_ipv6_option_error.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_process_fragment_option.c
+            nx_ipv6_process_hop_by_hop_option.c
+            nx_ipv6_process_routing_option.c
+            nx_ipv6_util.c
+            nx_nd_cache_delete_internal.c
+            nx_packet_copy.c
+            nx_packet_data_append.c
+            nx_packet_pool_low_watermark_set.c
+            nx_tcp_cleanup_deferred.c
+            nx_tcp_periodic_processing.c
+            nx_tcp_socket_disconnect_complete_notify.c
+            nx_tcp_socket_establish_notify.c
+            nx_tcp_socket_queue_depth_notify_set.c
+            nx_tcp_socket_receive_queue_max_set.c
+            nx_tcp_socket_timed_wait_callback.c
+            nx_udp_socket_receive.c
+            nxd_icmpv6_ra_flag_callback_set.c
+            nxd_ipv6_address_change_notify.c
+            nxd_ipv6_address_delete.c
+            nxd_ipv6_address_get.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_default_router_add.c
+            nxd_ipv6_default_router_delete.c
+            nxd_ipv6_default_router_entry_get.c
+            nxd_ipv6_default_router_get.c
+            nxd_ipv6_default_router_number_of_entries_get.c
+            nxd_ipv6_disable.c
+            nxd_ipv6_enable.c
+            nxd_ipv6_multicast_interface_join.c
+            nxd_ipv6_multicast_interface_leave.c
+            nxd_ipv6_stateless_address_autoconfig_disable.c
+            nxd_ipv6_stateless_address_autoconfig_enable.c
+            nxd_nd_cache_entry_delete.c
+            nxd_nd_cache_entry_set.c
+            nxd_nd_cache_hardware_address_find.c
+            nxd_nd_cache_invalidate.c
+            nxd_nd_cache_invalidate_internal.c
+            nxd_nd_cache_ip_address_find.c
+            nxd_udp_socket_send.c
+            nxde_icmpv6_ra_flag_callback_set.c
+            nxde_ipv6_address_change_notify.c
+            nxde_ipv6_address_delete.c
+            nxde_ipv6_address_get.c
+            nxde_ipv6_address_set.c
+            nxde_ipv6_default_router_add.c
+            nxde_ipv6_default_router_delete.c
+            nxde_ipv6_default_router_entry_get.c
+            nxde_ipv6_default_router_get.c
+            nxde_ipv6_default_router_number_of_entries_get.c
+            nxde_ipv6_disable.c
+            nxde_ipv6_enable.c
+            nxde_ipv6_multicast_interface_join.c
+            nxde_ipv6_multicast_interface_leave.c
+            nxde_ipv6_stateless_address_autoconfig_disable.c
+            nxde_ipv6_stateless_address_autoconfig_enable.c
+            nxde_nd_cache_entry_delete.c
+            nxde_nd_cache_entry_set.c
+            nxde_nd_cache_hardware_address_find.c
+            nxde_nd_cache_invalidate.c
+            nxde_nd_cache_ip_address_find.c
+            nxe_ip_auxiliary_packet_pool_set.c
+            nxe_ip_interface_capability_get.c
+            nxe_ip_interface_capability_set.c
+            nxe_ip_raw_packet_filter_set.c
+            nxe_ip_static_route_add.c
+            nxe_ip_static_route_delete.c
+            nxe_packet_pool_low_watermark_set.c
+            nxe_tcp_socket_disconnect_complete_notify.c
+            nxe_tcp_socket_establish_notify.c
+            nxe_tcp_socket_queue_depth_notify_set.c
+            nxe_tcp_socket_receive_queue_max_set.c
+            nxe_tcp_socket_timed_wait_callback.c
+
+        Files are modified to return NX_NOT_SUPPORTED when related compiler option is not enabled:
+            nx_api.h
+            nx_icmp.h
+            nx_icmpv6.h
+            nx_ipv6.h
+            nx_nd_cache.h
+            nx_packet.h
+            nx_tcp.h
+            nx_tcp_socket_disconnect_complete_notify.c
+            nx_tcp_socket_establish_notify.c
+            nx_tcp_socket_queue_depth_notify_set.c
+            nx_tcp_socket_timed_wait_callback.c
+            nxd_icmpv6_ra_flag_callback_set.c
+            nxd_ipv6_address_change_notify.c
+            nxd_ipv6_address_delete.c
+            nxd_ipv6_address_get.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_default_router_add.c
+            nxd_ipv6_default_router_delete.c
+            nxd_ipv6_default_router_entry_get.c
+            nxd_ipv6_default_router_get.c
+            nxd_ipv6_default_router_number_of_entries_get.c
+            nxd_ipv6_multicast_interface_join.c
+            nxd_ipv6_multicast_interface_leave.c
+            nxd_ipv6_stateless_address_autoconfig_disable.c
+            nxd_ipv6_stateless_address_autoconfig_enable.c
+            nxd_nd_cache_entry_delete.c
+            nxd_nd_cache_entry_set.c
+            nxd_nd_cache_hardware_address_find.c
+            nxd_nd_cache_invalidate.c
+            nxd_nd_cache_ip_address_find.c
+            nxde_icmpv6_ra_flag_callback_set.c
+            nxde_ipv6_address_delete.c
+            nxde_ipv6_address_get.c
+            nxde_ipv6_address_set.c
+            nxde_ipv6_default_router_add.c
+            nxde_ipv6_default_router_delete.c
+            nxde_ipv6_default_router_entry_get.c
+            nxde_ipv6_default_router_get.c
+            nxde_ipv6_default_router_number_of_entries_get.c
+            nxde_ipv6_stateless_address_autoconfig_disable.c
+            nxde_ipv6_stateless_address_autoconfig_enable.c
+            nxde_nd_cache_entry_delete.c
+            nxde_nd_cache_entry_set.c
+            nxde_nd_cache_hardware_address_find.c
+            nxde_nd_cache_invalidate.c
+            nxde_nd_cache_ip_address_find.c
+            nxe_ip_auxiliary_packet_pool_set.c
+            nxe_tcp_socket_disconnect_complete_notify.c
+            nxe_tcp_socket_establish_notify.c
+            nxe_tcp_socket_queue_depth_notify_set.c
+            nxe_tcp_socket_timed_wait_callback.c
+
+         Files are modified to fix address index check for loopback interface:
+            nxde_icmp_source_ping.c
+            nxde_ip_raw_packet_source_send.c
+            nxde_udp_socket_source_send.c
+            nxe_ip_raw_packet_source_send.c
+            nxe_udp_socket_source_send.c
+
+         Files are modified to support IP packet filter:
+            nx_api.h
+            nx_ip_packet_receive.c
+            nx_ip_packet_send.c
+            nx_ipv6_packet_send.c
+
+        Files are added or modified to set TCP receive queue length:
+            nx_api.h
+            nx_tcp.h
+            nx_tcp_socket_create.c
+            nx_tcp_socket_receive_queue_max_set.c
+            nx_tcp_socket_state_data_check.c
+            nx_user.h
+            nxe_tcp_socket_receive_queue_max_set.c
+
+        Files are added or modified to support packet pool low watermark:
+            nx_api.h
+            nx_packet.h
+            nx_packet_pool_low_watermark_set.c
+            nx_tcp_socket_state_data_check.c
+            nx_udp_packet_receive.c
+            nx_user.h
+            nxe_packet_pool_low_watermark_set.c
+            nxe_tcp_socket_receive_queue_max_set.c
+
+        Files are modified to add mutex protection:
+            nx_rarp_disable.c
+            nx_tcp_socket_queue_depth_notify_set.c
+            nx_tcp_socket_receive_notify.c
+            nx_tcp_socket_timed_wait_callback.c
+            nx_tcp_socket_window_update_notify_set.c
+
+        Files are added or modified to fix source selection for icmpv4 ping:
+            nx_icmpv4.h
+            nx_icmp_interface_ping.c
+            nx_icmp_ping.c
+            nxd_icmp_source_ping.c
+
+        Files are modified to support ASSERT macro:
+            nx_api.h
+            nx_icmpv6_dest_table_add.c
+            nx_ip_header_add.c
+            nx_ip_driver_packet_send.c
+            nx_ipv6_packet_send.c
+            nxd_ipv6_destination_table_find_next_hop.c
+            nxd_ipv6_interface_find.c
+
+        Files are added or modified to support NewReno algorithm:
+            nx_api.h
+            nx_tcp.h
+            nx_tcp_socket_retransmit.c
+            nx_tcp_fast_periodic_processing.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_socket_block_cleanup.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_transmit_check.c
+            nx_tcp_socket_state_syn_sent.c
+            nx_tcp_socket_state_syn_received.c
+
+        Files are added or modified to optimize the logic of sending TCP control packet:
+            nx_tcp_packet_send_control.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_packet_send_ack.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_rst.c
+
+        Files are deleted due to they are not used:
+            nxe_igmp_multicast_interface_join_internal.c
+            nxe_igmp_multicast_interface_leave_internal.c
+
+        Files are modified to unify the definition of ThreadX ticks per second, use TX_TIMER_TICKS_PER_SECOND to derive NX_IP_PERIODIC_RATE:
+            demo_netx_duo_multihome_tcp.c
+            demo_netx_duo_multihome_udp.c
+            demo_netx_duo_tcp.c
+            demo_netx_duo_udp.c
+            nx_api.h
+            nx_icmpv6_dest_table_add.c
+            nx_icmpv6_dest_table_find.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_validate_ra.c
+            nx_ip_create.c
+            nx_ip_fast_periodic_timer_entry.c
+            nx_system.h
+            nx_system_initialize.c
+            nx_tcp.h
+            nx_tcp_enable.c
+            nx_user.h
+            nxd_ipv6_disable.c
+            nxd_ipv6_enable.c
+
+        Files are deleted or modified to simplified the logic of extracting the prefix:
+            nx_ipv6_address_find_prefix.c
+            nx_ipv6.h
+            nx_ipv6_prefix_list_delete_entry.c
+
+        Files are modified to correct the IP Identification field for retransmitted packet:
+            nx_api.h
+            nx_ip_header_add.c
+            nx_packet_allocate.c
+            nx_packet_release.c
+            nx_tcp_socket_retransmit.c
+
+        Files are added or modified to fix zero window probe packet:
+            nx_api.h
+            nx_tcp.h
+            nx_tcp_fast_periodic_processing.c
+            nx_tcp_packet_send_probe.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+
+        Files are modified to correct the sequence and ACK number check for TCP disconnect process:
+            nx_api.h
+            nx_tcp.h
+            nx_tcp_server_socket_accept.c
+            nx_tcp_socket_packet_process.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_fin_wait1.c
+            nx_tcp_socket_state_fin_wait2.c
+            nx_tcp_client_socket_connect.c
+
+        Files are modified to pass PC-Lint check:
+            nx_icmp.h
+            nx_icmpv6.h
+            nx_ip.h
+            nx_ipv4.h
+            nx_ipv6.h
+            nx_ipv6_prefix_list_delete.c
+            nx_nd_cache.h
+            nx_udp.h
+            nxd_icmp_ping.c
+            nxd_icmp_source_ping.c
+            nxd_icmpv6_ra_flag_callback_set.c
+            nxd_ip_raw_packet_send.c
+            nxd_ipv6_address_change_notify.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_default_router_add_internal.c
+            nxd_ipv6_destination_table_find_next_hop.c
+            nxd_ipv6_disable.c
+            nxd_ipv6_enable.c
+            nxd_ipv6_find_default_router_from_address.c
+            nxd_ipv6_find_max_prefix_length.c
+            nxd_ipv6_interface_find.c
+            nxd_ipv6_raw_packet_send_internal.c
+            nxd_ipv6_router_lookup.c
+            nxd_ipv6_search_onlink.c
+            nxd_ipv6_stateless_address_autoconfig_enable.c
+            nxd_nd_cache_entry_set.c
+            nxd_nd_cache_hardware_address_find.c
+            nxde_icmp_ping.c
+            nxde_icmp_source_ping.c
+            nxde_ip_raw_packet_send.c
+            nxde_ip_raw_packet_source_send.c
+            nxde_ipv6_address_delete.c
+            nxde_ipv6_default_router_delete.c
+            nxde_ipv6_multicast_interface_join.c
+            nxde_ipv6_multicast_interface_delete.c
+            nxde_nd_cache_entry_set.c
+            nxde_udp_socket_send.c
+
+
+        Files are modified to remove deprecated macro for IPv6 path MTU:
+            nx_icmpv6.h
+            nx_user.h
+
+
+        Files are added or modified to support packet debug feature:
+            nx_api.h
+            nx_arp_gratuitous_send.c
+            nx_arp_packet_deferred_receive.c
+            nx_arp_packet_send.c
+            nx_icmp_interface_ping6.c
+            nx_icmp_packet_process.c
+            nx_icmp_packet_receive.c
+            nx_icmp_ping.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_echo_reply.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_packet_too_big.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+            nx_igmp_multicast_interface_leave_internal.c
+            nx_igmp_packet_process.c
+            nx_igmp_packet_receive.c
+            nx_igmp_periodic_processing.c
+            nx_ip_dispatch_process.c
+            nx_ip_driver_packet_send.c
+            nx_ip_fragment_forward_packet.c
+            nx_ip_fragment_packet.c
+            nx_ip_packet_deferred_receive.c
+            nx_ip_packet_receive.c
+            nx_ip_packet_send.c
+            nx_ip_raw_packet_processing.c
+            nx_ip_raw_packet_send.c
+            nx_ip_raw_packet_source_send.c
+            nx_ip_thread_entry.c
+            nx_ipv4_packet_receive.c
+            nx_ipv6_fragment_process.c
+            nx_ipv6_packet_receive.c
+            nx_ipv6_process_fragment_option.c
+            nx_ipv6_process_hop_by_hop_option.c
+            nx_ipv6_process_routing_option.c
+            nx_packet.h
+            nx_packet_allocate.c
+            nx_packet_copy.c
+            nx_packet_data_append.c
+            nx_packet_debug_info_get.c
+            nx_packet_pool_create.c
+            nx_packet_release.c
+            nx_packet_transmit_release.c
+            nx_rarp_packet_deferred_receive.c
+            nx_rarp_packet_send.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_receive.c
+            nx_tcp_queue_process.c
+            nx_tcp_socket_packet_process.c
+            nx_tcp_socket_send.c
+            nx_tcp_socket_send_internal.c
+            nx_udp_packet_receive.c
+            nx_user.h
+            nxd_ip_raw_packet_source_send.c
+            nxd_udp_socket_send.c
+
+
+        Files are modified to support packet alignment for both header and payload:
+            nx_api.h
+            nx_packet_pool_create.c
+            nxe_packet_pool_create.c
+            nx_user.h
+
+        Files are added or modified to ensure only one ARP entry point to specific address and optimized the ARP queued packet sending:
+            nx_api.h
+            nx_arp.h
+            nx_arp_queue_send.c
+            nx_arp_dynamic_entry_set.c
+            nx_arp_entry_allocate.c
+            nx_arp_static_entry_create.c
+            nx_arp_static_entry_delete_internal.c
+            nx_arp_packet_receive.c
+            nx_ip_driver_packet_send.c
+
+        Files are modified to send TCP reset message when receive an illegal TCP option:
+            nx_tcp.h
+            nx_tcp_packet_process.c
+            nx_tcp_server_socket_relisten.c
+            nx_tcp_mss_option_get.c
+            nx_tcp_window_scaling_option_get.c
+            nx_tcp_no_connection_reset.c
+
+        Files are modified to support for TCP TIMED WAIT state:
+            nx_tcp.h
+            nx_tcp_enable.c
+            nxd_tcp_client_socket_connect.c
+            nx_tcp_fast_periodic_processing.c
+            nx_tcp_socket_state_fin_wait1.c
+            nx_tcp_socket_state_fin_wait2.c
+            nx_tcp_socket_state_closing.c
+            nx_tcp_socket_packet_process.c
+
+        Files are modified to optimize the code for deleting transmission control block
+            nx_tcp.h
+            nx_tcp_fast_periodic_processing.c
+            nx_tcp_client_socket_unbind.c
+            nx_tcp_socket_block_cleanup.c
+            nx_tcp_socket_connection_reset.c
+            nx_tcp_socket_disconnection.c
+            nx_tcp_socket_state_last_ack.c
+
+        Files are added or modified to support ICMPv4 error message:
+            nx_icmpv4.h
+            nx_icmpv4_packet_process.c
+            nx_icmpv4_process_echo_reply.c
+            nx_icmpv4_process_echo_request.c
+            nx_icmpv4_send_error_message.c
+            nx_ip_dispatch_process.c
+            nx_ip_fragment_timeout_check.c
+            nx_udp_packet_receive.c
+
+        Files are added or modified to support IP Option processing:
+            nx_ipv4.h
+            nx_ipv4_packet_receive.c
+            nx_ipv4_option_process.c
+
+        Files are modified to correct the reassembly time:
+            nx_api.h
+            nx_user.h
+            nx_ip_fragment_assembly.c
+
+        Files are modified to optimize the code.
+            nx_ip_gateway_address_set.c
+            nx_ipv4.h
+            nx_nd_cache_add.c
+            nx_nd_cache_add_entry.c
+            nx_nd_cache_find_entry.c
+            nx_tcp_client_bind_cleanup.c
+            nx_tcp_connect_cleanup.c
+            nx_tcp_disconnect_cleanup.c
+            nx_tcp_receive_cleanup.c
+            nx_tcp_transmit_cleanup.c
+            nxd_ipv6_stateless_address_autoconfig_disable.c
+            nxd_ipv6_stateless_address_autoconfig_enable.c
+            nxd_nd_cache_ip_address_find.c
+            nxd_nd_cache_hardware_address_find.c
+            nxde_ipv6_stateless_address_autoconfig_disable.c
+            nxde_ipv6_stateless_address_autoconfig_enable.c
+            nxe_ip_gateway_address_set.c
+            nxe_ip_raw_packet_receive.c
+            nxe_ip_static_route_add.c
+
+         Files are modified to assembled all the fragments before calling NAT service:
+            nx_api.h
+            nx_ip_fragment_assembly.c
+            nx_ipv4_packet_receive.c
+
+        The following table contains mappings from legacy names to the new names developers
+        are encouraged to use for furture development work.  For backward compatibility reasons,
+        legacy names are still maintained. Therefore existing projects and build systems are not
+        affected.
+
+
+                  Legacy Names                                       New Names
+
+            NX_ARP_DISABLE_AUTO_ARP_ENTRY                       NX_DISABLE_ARP_AUTO_ENTRY
+            NX_DISABLE_ICMPv4_RX_CHECKSUM                       NX_DISABLE_ICMPV4_RX_CHECKSUM
+            NX_DISABLE_ICMPv4_TX_CHECKSUM                       NX_DISABLE_ICMPV4_TX_CHECKSUM
+            NX_DISABLE_ICMPv6_RX_CHECKSUM                       NX_DISABLE_ICMPV6_RX_CHECKSUM
+            NX_DISABLE_ICMPv6_TX_CHECKSUM                       NX_DISABLE_ICMPV6_TX_CHECKSUM
+            NX_DUAL_PACKET_POOL_ENABLE                          NX_ENABLE_DUAL_PACKET_POOL
+            NX_IPV6_ADDRESS_CHANGE_NOTIFY_ENABLE                NX_ENABLE_IPV6_ADDRESS_CHANGE_NOTIFY
+            NX_IPV6_DISABLE_PURGE_UNUSED_CACHE_ENTRIES          NX_DISABLE_IPV6_PURGE_UNUSED_CACHE_ENTRIES
+            NX_IPV6_MULTICAST_ENABLE                            NX_ENABLE_IPV6_MULTICAST
+            NX_TCP_ENABLE_KEEPALIVE                             NX_ENABLE_TCP_KEEPALIVE
+            NX_TCP_ENABLE_MSS_CHECK                             NX_ENABLE_TCP_MSS_CHECK
+            NX_TCP_ENABLE_WINDOW_SCALING                        NX_ENABLE_TCP_WINDOW_SCALING
+            NX_TCP_QUEUE_DEPTH_UPDATE_NOTIFY_ENABLE             NX_ENABLE_TCP_QUEUE_DEPTH_UPDATE_NOTIFY
+            NXDUO_DESTINATION_TABLE_SIZE                        NX_IPV6_DESTINATION_TABLE_SIZE
+            NXDUO_DISABLE_ICMPV6_ERROR_MESSAGE                  NX_DISABLE_ICMPV6_ERROR_MESSAGE
+            NXDUO_DISABLE_ICMPV6_REDIRECT_PROCESS               NX_DISABLE_ICMPV6_REDIRECT_PROCESS
+            NXDUO_DISABLE_ICMPV6_ROUTER_ADVERTISEMENT_PROCESS   NX_DISABLE_ICMPV6_ROUTER_ADVERTISEMENT_PROCESS
+            NXDUO_DISABLE_ICMPV6_ROUTER_SOLICITATION            NX_DISABLE_ICMPV6_ROUTER_SOLICITATION
+            NXDUO_DISABLE_DAD                                   NX_DISABLE_IPV6_DAD
+            NXDUO_DUP_ADDR_DETECT_TRANSMITS                     NX_IPV6_DAD_TRANSMITS
+            NXDUO_ICMPV6_MAX_RTR_SOLICITATIONS                  NX_ICMPV6_MAX_RTR_SOLICITATIONS
+            NXDUO_ICMPV6_RTR_SOLICITATION_INTERVAL              NX_ICMPV6_RTR_SOLICITATION_INTERVAL
+            NX_CRYPTO_MAX_IV_SIZE_IN_BITS                       (Moved into IPsec module)
+
+        Files are modified to rename symbols:
+
+            nx_api.h
+            nx_arp_gratuitous_send.c
+            nx_arp_packet_receive.c
+            nx_arp_packet_send.c
+            nx_icmp_interface_ping6.c
+            nx_icmp_interface_ping.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv4_process_echo_request.c
+            nx_icmpv4_send_error_message.c
+            nx_icmpv6_DAD_failure.c
+            nx_icmpv6_destination_table_periodic_update.c
+            nx_icmpv6_dest_table_add.c
+            nx_icmpv6_dest_table_find.c
+            nx_icmpv6.h
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_perform_DAD.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+            nx_icmpv6_validate_ra.c
+            nx_igmp_multicast_interface_leave_internal.c
+            nx_igmp_periodic_processing.c
+            nx_invalidate_destination_entry.c
+            nx_ip_auxiliary_packet_pool_set.c
+            nx_ip_create.c
+            nx_ip_dispatch_process.c
+            nx_ip_fragment_timeout_check.c
+            nx_ip_interface_attach.c
+            nx_ip_interface_detach.c
+            nx_ip_packet_receive.c
+            nx_ip_packet_send.c
+            nx_ip_thread_entry.c
+            nx_ipv6_option_error.c
+            nx_ipv6_packet_receive.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_prefix_list_delete_entry.c
+            nx_ipv6_process_fragment_option.c
+            nx_ipv6_process_routing_option.c
+            nx_mld.h
+            nx_nd_cache_add_entry.c
+            nx_nd_cache_delete_internal.c
+            nx_packet.h
+            nx_packet_pool_low_watermark_set.c
+            nx_rarp_packet_send.c
+            nx_system.h
+            nx_system_initialize.c
+            nx_tcp.h
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_control.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_periodic_processing.c
+            nx_tcp_server_socket_relisten.c
+            nx_tcp_socket_create.c
+            nx_tcp_socket_disconnect.c
+            nx_tcp_socket_queue_depth_notify_set.c
+            nx_tcp_socket_receive_queue_max_set.c
+            nx_tcp_socket_retransmit.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_data_check.c
+            nx_tcp_socket_state_established.c
+            nx_tcp_socket_state_syn_received.c
+            nx_tcp_socket_state_syn_sent.c
+            nx_tcp_window_scaling_option_get.c
+            nx_udp_packet_receive.c
+            nx_user.h
+            nxde_ipv6_address_change_notify.c
+            nxde_ipv6_multicast_interface_join.c
+            nxde_ipv6_multicast_interface_leave.c
+            nxd_icmp_enable.c
+            nxd_ipv6_address_change_notify.c
+            nxd_ipv6_address_delete.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_destination_table_find_next_hop.c
+            nxd_ipv6_disable.c
+            nxd_ipv6_enable.c
+            nxd_ipv6_interface_find.c
+            nxd_ipv6_multicast_interface_join.c
+            nxd_ipv6_multicast_interface_leave.c
+            nxd_ipv6_prefix_router_timer_tick.c
+            nxd_ipv6_router_solicitation_check.c
+            nxe_packet_pool_low_watermark_set.c
+            nxe_tcp_socket_create.c
+            nxe_tcp_socket_queue_depth_notify_set.c
+            nxe_tcp_socket_receive_queue_max_set.c
+
+
+
+        Other modified files:
+            nx_api.h                                         Removed internal functions.
+                                                               Fixed typo for API names of stateless address control.
+                                                               Added a macro to disable warning of parameter not used.
+            nx_icmp_ping.h                                   Optimized the data offset of request packet.
+            nx_icmp_interface_ping6.c                        Removed limitation of message size when sending echo request.
+            nx_icmpv6.h                                      Updated the function name.
+                                                               Removed unused argument of _nxd_ipv6_destination_table_find_next_hop.
+            nx_icmpv6_dest_table_add.c                       Fixed a bug when destination table was full, index of
+                                                               array was out of bound.
+            nx_icmpv6_perform_DAD.c                          Updated the function name.
+            nx_icmpv6_DAD_clear_NDCache_entry.c              Updated the function name and optimized the code.
+            nx_icmpv6_DAD_failure.c                          Renamed the argument name to make it sense.
+            nx_icmpv6_process_packet_too_big.c               Fixed a bug that packet was not released.
+            nx_icmpv6_process_ra.c                           Fixed a bug that address was formed when prefix was link local.
+                                                               Fixed the logic to find empty address entry.
+                                                               Fixed retrans timer when it is 0.
+            nx_icmpv6_process_redirect.c                     Fixed return status check. Fixed endian of MTU.
+            nx_icmpv6_send_error_message.c                   Used wrong IPv6 address.
+                                                               Fixed packet leak if IPsec SA disallows this packet.
+                                                               Fixed multicast destination address check.
+            nx_icmpv6_send_queued_packets                    Optimized the logic for IPv6 fragment processing.
+            nx_icmpv6_send_rs.c                              Removed unreachable code.
+            nx_icmpv6_validate_neighbor_message.c            Removed unused argument.
+            nx_icmpv6_validate_ra.c                          Removed unused argument.
+            nx_igmp_packet_process.c                         Optimized the logic of verifying checksum.
+            nx_igmp_periodic_process.c                       Removed useless code.
+            nx_ip_checksum_compute.c                         Fixed calculation for packet size that is only two bytes aligned.
+            nx_ip_create.c                                   Removed the status check for TX API since internal call should be succeed.
+            nx_ip_deferred_link_status_process.c             Removed cleanup logic when link was down.
+            nx_ip_delete.c                                   Invalidated dynamic ARP entries and ND cache,
+                                                               in case packets were queued.
+            nx_ip_dispatch_process.c                         Corrected length check for extension header.
+                                                               Removed unreachable code.
+            nx_ip_driver_packet_send.c                       Added support for IPv4 link-local address
+                                                               Optimized the logic for packet sending.
+                                                               Added fragmentation check.
+            nx_ip_header_add.c                               Stored IP header for outgoing packet.
+            nx_ip_fragment_assembly.c                        Used the more recently arrived copy if fragments contain the same data.
+                                                               Corrected the logic to find insert position for IPv6 fragments.
+            nx_ip_fragment_disable.c                         Removed unreachable code when NX_FRAGMENT_IMMEDIATE_ASSEMBLY is defined.
+            nx_ip_fragment_packet.c                          Removed unreachable code.
+            nx_ip_fragment_forward_packet.c                  Removed unreachable code.
+            nx_ip_forward_packet_process.c                   Added checks for link local address before forwarding.
+            nx_ip_interface_attach.c                         Fixed duplicate empty address.
+            nx_ip_interface_detach.c                         Simplified the logic to leave multicast group.
+            nx_ip_interface_status_check.c                   Checked driver code for NX_IP_LINK_ENABLED status.
+                                                               Fixed the bug for wait_option.
+            nx_ip_packet_checksum_compute.c                  Removed code not used. Fixed offset when IPv4 header contained options.
+                                                               Removed flag after IPv4 checksum calculated.
+                                                               Fixed length calculation of IPv4 header.
+            nx_ip_packet_send.c                              Removed unreachable lines.
+                                                               Initialized status value.
+            nx_ip_raw_packet_send.c                          Removed duplicate check for raw service enabled.
+            nx_ip_raw_packet_source_send.c                   Removed duplicate check for raw service enabled.
+                                                               Optimized the code.
+            nx_ip_route_find.c                               Optimized search operation for loopback address.
+                                                               Fixed a bug that loopback interface was used by multicast or broadcase address.
+                                                               Added support for link-local address.
+                                                               Verified whther or not routing address was reachable.
+            nx_ip_static_route_add.c                         Fixed a bug that mutex is not released before return.
+            nx_ip_status_check.c                             Removed duplicated code.
+            nx_ip_thread_entry.c                             Ensured the pointer function is valid before use.
+            nx_ipv4_packet_receive.c                         Fixed a bug in source check when address mapping is not needed.
+            nx_ipv6_fragment_process.c                       Fixed offset of fragment packets.
+            nx_ipv6_multicast_leave.c                        Removed unreachable code.
+            nx_ipv6_multicast_join.c                         Removed unreachable code.
+            nx_ipv6_option_error.c                           Removed duplicated check for function pointer.
+            nx_ipv6_packet_copy.c                            Fixed a bug that four extra bytes were incorrectly copied.
+            nx_ipv6_packet_send.c                            Removed fragment check when IPsec is disabled for PMTU, stored IP header for outgoing packet.
+            nx_ipv6_prefix_list_add_entry.c                  Fixed a bug that prefix was not sorted.
+                                                               Removed unused argument.
+            nx_ipv6_prefix_list_delete_entry.c               Optimized the logic to find address.
+            nx_ipv6_process_hop_by_hop_option.c              Eliminated unreachable code.
+            nx_ipv6_util.c                                   Removed unnecessary NULL check in IPv6_Address_Type.
+            nx_mld.h                                         Cleaned up this file.
+            nx_packet_allocate.c                             Moved packet type check from _nxe_packet_allocate since
+                                                               it is necessary when _nx_packet_allocate is called
+                                                               by internal functions.
+            nx_packet_copy.c                                 Copied the data of the first packet beginning at data starting position.
+                                                               Fixed the bug for ip header pointer set.
+            nx_packet_pool_create.c                          Removed unreachable code.
+            nx_ram_network_driver.c                          Removed unused parameter in _nx_ram_network_driver_output.
+                                                               Supported more commands.
+            nx_rarp_packet_receive.c                         Continued RARP when address mapping needed.
+            nx_tcp.h                                         Defined the TCP minimum acceptable MSS.
+                                                               Added missing TCP function declarations.
+            nx_tcp_client_socket_unbind.c                    Limited the socket state to closed only.
+            nx_tcp_fast_periodic_processing.c                Modified the logic for zero window probe.
+                                                               Updated ACK number and window size for retransmitted packet.
+            nx_tcp_packet_process.c                          Fixed invalid source address check.
+                                                               Improved statistics of invalid packet.
+                                                               Optimized the logic of processing RST packet for listen queue.
+            nx_tcp_periodic_processing.c                     Updated the retries to reach the max value.
+            nx_tcp_server_socket_accept.c                    Removed unreachable code.
+            nx_tcp_server_socket_unlisten.c                  Reset the socket state only when it was listening.
+            nx_tcp_socket_create.c                           Removed duplicated check for window size.
+            nx_tcp_socket_send_internal.c                    Modified the wait time.
+                                                               Removed the TCP transmit suspended count limitation.
+                                                               Modified to release IP mutex protection before a blocking call.
+                                                               Replaced NX_NO_WAIT with the input wait_option in nx_packet_allocate, nx_packet_data_append.
+                                                               Removed duplicated error check.
+                                                               Optimized the logic of processing sending packet.
+                                                               Fixed the alignment of subsequent packet in chain.
+            nx_tcp_socket_disconnect.c                       Removed check for transmit queue when connection was not established.
+                                                               Called the cleanup routines after completed the tcp disconnected operation.
+            nx_tcp_socket_packet_process.c                   Removed the data check in CLOSE WAIT state.
+                                                               Checked ACK for LAST ACK and CLOSING state.
+                                                               Checked socket state before processing data.
+                                                               Fixed a bug that the receive window can not recover.
+            nx_tcp_socket_receive.c                          Modified the logic for SWS avoidance algorithm.
+            nx_tcp_socket_state_ack_check.c                  Corrected the processing procedure for SYN/ACK bits.
+                                                               Modified the logic to adjust congestion window during slow start and congestion avoidance.
+                                                               Fixed a bug in ACK check logic if the packet was not transmitted by driver.
+                                                               Stored IP header for outgoing packet.
+            nx_tcp_socket_state_closing.c                    Removed sending ACK message code if ACK did not acknowledge FIN.
+            nx_tcp_socket_state_data_check.c                 Fixed the ACKed packets in order.
+                                                               Fixed the bug for updating receive window.
+                                                               Trimmed the data that out of receive window.
+                                                               Optimized the logic when a packet with old data is received.
+                                                               Modified the logic for SWS avoidance algorithm.
+            nx_tcp_socket_state_established.c                Removed unused parameter.
+            nx_tcp_socket_state_last_ack.c                   Removed sending ACK message code if ACK did not acknowledge FIN.
+            nx_tcp_socket_state_syn_sent.c                   Fixed sequence number for simultaneous connection.
+                                                               Checked maximum value of window scale when it was set.
+            nx_tcp_socket_state_syn_received.c               Updated tx_window_advertised value.
+                                                               Checked maximum value of window scale when it was set.
+                                                               Removed duplicated out of window check.
+            nx_tcp_window_scaling_option_get.c               Limited the maximum value of window scale.
+            nx_nd_cache_init.c                               Removed the status check for TX API since internal call should be succeed.
+            nx_nd_cache_interface_entries_delete.c           Removed duplicated deletion for destination table.
+            nx_tcp_packet_send_rst.c                         Modified reset ack number, sequence number and ACK bit according to incoming packet ACK bit.
+            nx_tcp_server_socket_relisten.c                  Released the protection before return.
+            nx_udp_packet_receive.c                          Removed duplicated check for function pointer.
+            nx_user.h                                        Added ASSERT macros. Remvoed unused macros.
+                                                               Added macros defined in nx_api.h but not in nx_user.h.
+                                                               Sorted options by module.
+            nxd_ip_raw_packet_source_send.c                  Removed duplicate check for raw service enabled.
+            nxd_ipv6_address_delete.c                        Fixed a bug that if_index may be used before initialized.
+            nxd_ipv6_address_set.c                           Fixed a bug that mutex is not released before return.
+                                                               Fixed link local duplicate address set.
+            nxd_ipv6_default_router_add_internal.c           Returned error status when router table was full.
+            nxd_ipv6_default_router_delete.c                 Returned error status when router table was not found.
+            nxd_ipv6_default_router_entry_get.c              Optimized logic comparing the interface.
+            nxd_ipv6_default_router_get.c                    Used the logic of _nxd_ipv6_default_router_entry_get.
+            nxd_ipv6_destination_table_find_next_hop.c       Removed unused argument.
+            nxd_ipv6_disable.c                               Cleaned up ND_CACHE when ICMP was enabled.
+            nxd_ipv6_enable.c                                Corrected retransmit timer when it is zero.
+            nxd_ipv6_interface_find.c                        Used first up interface for link local multicast.
+                                                               Fixed null pointer access.
+            nxd_nd_cache_entry_delete.c                      Removed duplicated deletion for destination table.
+            nxd_tcp_client_socket_connect.c                  Fixed the bug for address version check, updated the header size.
+                                                               Fixed loopback destination.
+                                                               Fixed the bug for socket state since it is updated in connect cleanup.
+            nxd_udp_socket_send.c                            Fixed statistics when IPv6 address was not valid.
+            nxde_ip_raw_packet_source_send.c                 Added the check for packet pointer.
+            nxde_ipv6_address_change_notify.c                Checked calling thread.
+            nxde_ipv6_address_set.c                          Filtered address that was not unicast type.
+            nxde_udp_socket_send.c                           Fixed checking for header area of packet.
+            nxde_udp_socket_source_send.c                    Added the check for packet pointer.
+            nxe_arp_dynamic_entry_set.c                      Added the check for IP address.
+            nxe_arp_ip_address_find.c                        Added the check for invalid physical address.
+            nxe_arp_static_entry_create.c                    Added the check for invalid physical address.
+                                                               Added the check for IP address.
+            nxe_arp_static_entry_delete.c                    Added the check for invalid physical address.
+            nxe_ip_create.c                                  Added the priority check.
+            nxe_packet_allocate.c                            Moved packet type check to _nx_packet_allocate since
+                                                               it is necessary when _nx_packet_allocate is called
+                                                               by internal functions.
+            nxe_tcp_socket_create.c                          Checked window size when window scale was not enabled.
+            nxe_tcp_socket_send.c                            Fixed checking for header area of packet.
+            nxe_tcp_socket_disconnect_complete_notify.c      Added the check for input parameters.
+            nxe_tcp_socket_establish_notify.c                Added the check for input parameters.
+            nxe_tcp_socket_timed_wait_callback.c             Added the check for input parameters.
+            nxe_udp_socket_send.c                            Fixed checking for header area of packet.
+            nxe_udp_socket_source_send.c                     Fixed checking for header area of packet.
+
+
+01/12/2015  NetX Duo generic code version 5.8. This release includes the
+            following major features:
+
+
+        Files are modified to remove deprecated macro for IPv6 path MTU:
+            nx_icmpv6.h
+            nx_user.h
+
+
+        Files are added or modified to support ipv4 multicast feature:
+            nx_ipv4_multicast_interface_join.c
+            nx_ipv4_multicast_interface_leave.c
+            nxe_ipv4_multicast_interface_join.c
+            nxe_ipv4_multicast_interface_leave.c
+
+
+        Files are modified to fix compiler warnings:
+            nx_arp_packet_receive.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv6.h
+            nx_icmpv6_dest_table_find.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_echo_reply.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_queued_packets.c
+            nx_icmpv6_send_rs.c
+            nx_icmpv6_validate_neighbor_message.c
+            nx_icmpv6_validate_ra.c
+            nx_igmp_packet_process.c
+            nx_igmp_periodic_processing.c
+            nx_invalidate_destination_entry.c
+            nx_ip_checksum_compute.c
+            nx_ip_dispatch_process.c
+            nx_ip_forward_packet_process.c
+            nx_ip_fragment_assembly.c
+            nx_ip_fragment_packet.c
+            nx_ip_packet_receive.c
+            nx_ipv4_packet_receive.c
+            nx_ipv6_address_find_prefix.c
+            nx_ipv6_fragment_process.c
+            nx_ipv6_option_error.c
+            nx_ipv6_packet_copy.c
+            nx_ipv6_packet_receive.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_prefix_list_add_entry.c
+            nx_ipv6_process_fragment_option.c
+            nx_ipv6_process_hop_by_hop_option.c
+            nx_ipv6_process_routing_option.c
+            nx_ipv6_util.c
+            nx_nd_cache_add.c
+            nx_nd_cache_add_entry.c
+            nx_nd_cache_find_entry.c
+            nx_packet_copy.c
+            nx_packet_data_append.c
+            nx_packet_data_retrieve.c
+            nx_tcp_no_connection_reset.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_ack.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_rst.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_socket_bytes_available.c
+            nx_tcp_socket_mss_set.c
+            nx_tcp_socket_send.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_data_check.c
+            nx_udp_packet_receive.c
+            nx_udp_socket_receive.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_default_router_add_internal.c
+            nxd_ipv6_default_router_entry_get.c
+            nxd_ipv6_default_router_get.c
+            nxd_ipv6_destination_table_find_next_hop.c
+            nxd_ipv6_disable.c
+            nxd_ipv6_interface_find.c
+            nxd_ipv6_prefix_router_timer_tick.c
+            nxd_ipv6_search_onlink.c
+            nxd_nd_cache_hardware_address_find.c
+            nxd_nd_cache_ip_address_find.c
+            nxd_tcp_client_socket_connect.c
+            nxd_udp_socket_send.c
+            nxde_icmp_ping.c
+            nxde_icmp_source_ping.c
+            nxde_ip_raw_packet_send.c
+            nxe_ip_create.c
+            nxe_packet_pool_create.c
+            nxe_tcp_socket_create.c
+            nxe_tcp_socket_send.c
+            nxe_udp_socket_create.c
+            nxe_udp_socket_send.c
+            nxe_udp_source_extract.c
+
+
+        Files are modified to optimize NX_PACKET_STRUCT:
+            nx_api.h
+            nx_arp_dynamic_entry_set.c
+            nx_arp_packet_receive.c
+            nx_arp_packet_send.c
+            nx_icmp_interface_ping6.c
+            nx_icmp_ping.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_echo_reply.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_packet_too_big.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_process_redirect.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_queued_packets.c
+            nx_icmpv6_send_rs.c
+            nx_igmp_packet_process.c
+            nx_igmp_periodic_processing.c
+            nx_ip_dispatch_process.c
+            nx_ip_forward_packet_process.c
+            nx_ip_fragment_assembly.c
+            nx_ip_fragment_disable.c
+            nx_ip_fragment_packet.c
+            nx_ip_fragment_timeout_check.c
+            nx_ip_packet_receive.c
+            nx_ip_packet_send.c
+            nx_ip_raw_packet_send.c
+            nx_ip_raw_packet_source_send.c
+            nx_ipv4.h
+            nx_ipv4_packet_receive.c
+            nx_ipv6.h
+            nx_ipv6_fragment_process.c
+            nx_ipv6_packet_receive.c
+            nx_ipv6_packet_send.c
+            nx_packet_allocate.c
+            nx_packet_copy.c
+            nx_packet_data_append.c
+            nx_packet_data_extract_offset.c
+            nx_packet_pool_create.c
+            nx_packet_release.c
+            nx_packet_transmit_release.c
+            nx_ram_network_driver.c
+            nx_rarp_packet_receive.c
+            nx_rarp_packet_send.c
+            nx_tcp_fast_periodic_processing.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_ack.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_rst.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_server_socket_relisten.c
+            nx_tcp_socket_bytes_available.c
+            nx_tcp_socket_receive.c
+            nx_tcp_socket_receive_queue_flush.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_data_check.c
+            nx_tcp_socket_state_transmit_check.c
+            nx_tcp_socket_transmit_queue_flush.c
+            nx_udp_socket_receive.c
+            nx_udp_socket_source_send.c
+            nxd_ip_raw_packet_source_send.c
+            nxd_ipv6_raw_packet_send_internal.c
+            nxd_udp_packet_info_extract.c
+            nxd_udp_socket_send.c
+            nxd_udp_socket_source_send.c
+            nxde_udp_packet_info_extract.c
+            nxde_udp_socket_send.c
+            nxe_ip_raw_packet_send.c
+            nxe_ip_raw_packet_source_send.c
+            nxe_tcp_socket_send.c
+            nxe_udp_packet_info_extract.c
+            nxe_udp_socket_send.c
+            nxe_udp_socket_source_send.c
+
+
+        Files are modified to support the dual packet pool feature:
+            nx_api.h
+            nx_arp_gratuitous_send.c
+            nx_arp_packet_send.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+            nx_igmp_periodic_processing.c
+            nx_ip_create.c
+            nx_ip_auxiliary_packet_pool_set.c
+            nx_rarp_packet_send.c
+            nx_tcp_packet_send_ack.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_rst.c
+            nx_tcp_packet_send_syn.c
+            nx_user.h
+            nxe_ip_auxiliary_packet_pool_set.c
+
+
+        Files are modified to optimize NX_UDP_SOCKET_STRUCT:
+            nx_api.h
+            nx_udp_socket_create.c
+            nxd_udp_socket_send.c
+
+
+        Files are added or modified to support the link status change feature:
+            nx_api.h
+            nx_arp_interface_entries_delete.c
+            nx_icmpv6.h
+            nx_ip.h
+            nx_ip_deferred_link_status_process.c
+            nx_ip_driver_link_status_event.c
+            nx_ip_link_status_change_notify_set.c
+            nx_ip_thread_entry.c
+            nx_nd_cache_interface_entries_delete.c
+            nxe_ip_link_status_change_notify_set.c
+
+
+        Files are added or modified in order to fact out the IPv4 packet transmit process:
+            nx_ip_driver_packet_send.c
+            nx_ip_header_add.c
+            nx_ip_packet_send.c
+
+
+        Files are modified to consolidate IGMP-related data structure in the IP instance:
+            nx_api.h
+            nx_igmp_multicast_check.c
+            nx_igmp_packet_process.c
+            nx_igmp_periodic_processing.c
+            nx_ip_packet_send.c
+
+
+        Files are added or modified to support the simple IPv4 routing and the NAT feature:
+            nx_api.h
+            nx_icmpv4_packet_process.c
+            nx_ip_forward_packet_process.c
+            nx_ip_fragment_forward_packet.c
+            nx_ip_packet_send.c
+            nx_ipv4_packet_receive.c
+            nx_tcp_free_port_find.c
+            nx_tcp_client_socket_bind
+            nx_tcp_no_connection_reset.c
+            nx_tcp_packet_process.c
+            nx_tcp_server_socket_listen
+            nx_tcp_server_socket_relisten.c
+            nx_udp_free_port_find.c
+            nx_udp_socket_bind.c
+            nx_user.h
+
+
+        Files are modified to support user defined random function:
+            nx_api.h
+
+
+        Files are modified to support the router advertisement flag callback feature:
+            nx_api.h
+            nx_icmpv6.h
+            nx_icmpv6_process_ra.c
+            nxd_icmpv6_ra_flag_callback_set.c
+            nxde_icmpv6_ra_flag_callback_set.c
+
+
+        Files are modified to support the ARP conflict defend feature:
+            nx_api.h
+            nx_arp_packet_receive.c
+            nx_arp_periodic_update.c
+            nx_ip_address_set.c
+            nx_ip_interface_address_set.c
+            nx_user.h
+
+
+        Files are added or modified to optimized the logic for ARP dynamic entry deletion:
+            nx_arp_dynamic_entries_invalidate.c
+            nx_arp_dynamic_entry_delete.c
+            nx_arp_entry_allocate.c
+            nx_arp_entry_delete.c
+            nxe_arp_entry_delete.c
+            nx_arp_static_entry_delete.c
+            nx_arp_static_entry_delete_internal.c
+            nx_ip_create.c
+
+
+        Files are added or modified to support IPv4 multicast join and leave feature:
+            nx_igmp.h
+            nx_igmp_multicast_interface_join.c
+            nx_igmp_multicast_interface_join_internal.c
+            nx_igmp_multicast_interface_leave.c
+            nx_igmp_multicast_interface_leave_internal.c
+            nx_igmp_multicast_join.c
+            nx_igmp_multicast_leave.c
+            nx_igmp_packet_process.c
+            nx_igmp_periodic_processing.c
+            nxe_igmp_multicast_interface_join_internal.c
+            nxe_igmp_multicast_interface_leave.c
+            nxe_igmp_multicast_interface_leave_internal.c
+
+
+        Files are modified to support the router alert feature:
+            nx_igmp_periodic_processing.c
+            nx_ip_fragment_packet.c
+            nx_ip_packet_send.c
+            nx_ipv4.h
+
+
+        Other modified files:
+            nx_api.h                          Added new APIs for ipv4 multicast and interface detach, added definition of reassembly
+                                                added definition of reassembly time, added new service nx_ip_gateway_address_clear,
+                                                removed duplicate declarations, mapped the old APIs to new APIs, fixed a bug that
+                                                nx_ipv4_packet_receive is mapped to _nx_igmp_multicast_leave_internal which is nonexistent.
+            nx_arp.h                          Added new APIs for ARP dynamic entry delete, static entry delete internal and interface entries
+                                                delete, added ARP defend deature.
+            nx_arp_packet_receive.c           Fixed that packet is used after released,
+                                                added a feature that responds to a conflict GARP packet,
+                                                added an ARP man in the middle detection feature (NX_ARP_MAC_CHANGE_NOTIFICATION_ENABLE),
+                                                blocked adding entries to ARP cache with zero sender IP address,
+                                                prevent an ARP request matching an ARP entry sender address to change the mac address.
+            nx_arp_static_entry_create.c      Fixed a bug that interface is not initialized before used.
+            nx_icmp_interface_ping6.c         Fixed a bug for sequence when nx_ip_icmp_sequence is greater than 65535.
+            nx_icmpv4_packet_process.c        Fixed checksum zero for echo reply packet.
+            nx_icmpv6_DAD_failure.c           Fixed a bug that address was not removed from interface.
+            nx_icmpv6_perform_DAD.c           Optimized process logic.
+            nx_icmpv6_send_error_message.c    Fixed endianness of the offending packet, fixed handling multicast packet,
+                                                added logic to ensure data to copy does not exceed the ICMPv6 packet boundary.
+            nx_icmpv6_send_queued_packets.c   Fixed the bug for unspecified address check.
+                                              Cleaned up the nd_entry after fragment processing.
+            nx_icmpv6_packet_process          Modified the logic of checksum calculation.
+            nx_icmpv6_dest_table_add.c        Protected cache with mutex nx_nd_cache_protection.
+            nx_icmpv6_process_redirect.c      Protected cache with mutex nx_nd_cache_protection.
+            nx_ip.h                           Added new service nx_ip_gateway_clear,
+                                                added function to compute checksum for fragments,
+            nx_ipv4.h                         Added new service nx_ip_gatewar_clear.
+            nx_ip_create.c                    Supported loopback interface capability,
+            nx_ip_checksum_compute.c          Optimized the logic.
+                                                fixed a bug when the priority of the calling thread is lower than IP thread.
+            nx_ip_fragment_assembly.c         Added definition of reassembly time, fixed a bug in fragment queue.
+            nx_ip_fragment_packet.c           Fixed checksum calculation when fragment is performed,
+                                                copied interface from header packet, fixed size of each fragment,
+                                                fixed a bug that NX_DISABLE_IP_TX_CHECKSUM option was ignored.
+            nx_ip_fragment_timeout_check.c    Fixed the endian of offset flag before sending ICMPv6 error message.
+                                                Fixed a problem with reset of the tail fragment.
+                                                Fixed an error for reconnecting around a dropped fragment.
+            nx_ip_gateway_address_set.c       Modified the logic to disallow a zero IP address.
+            nx_ip_packet_receive.c            Added packet drop statisics for invalid packet.
+            nx_ip_packet_send.c               Fixed destination address for non local network,
+                                                fixed a bug in loopback interface processing,
+                                                optimized the logic,
+            nx_ip_route_find.c                Fixed a bug in loopback interface processing,
+                                                skipped interface which is down when finding route and gateway.
+            nx_ip_raw_packet_processing.c     Fixed a bug that interrupt is not restored when no thread waiting for packets.
+            nx_ip_static_route_add.c          Fixed a bug that route table may overflow,
+                                                added interface record when shifting route entries,
+                                                fixed a bug that unsigned number overflows.
+            nx_ip_static_route_delete.c       Added interface record when shifting route entries.
+            nx_ip_max_payload_size_find.c     Fixed a bug that src_address was set incorrectly,
+                                                removed unnecessary check for NULL pointer of IPv6 address.
+            nx_ipv4_packet_receive.c          Supported processing fragmentation immediately,
+                                                supported checking for source IP address.
+                                                added a feature that receive unicast DHCP message.
+            nx_ipv6_fragment_process.c        Fixed checksum calculation when fragment is performed,
+                                                used the same packet pool for original packet and fragmentations.
+                                              Increased the IP packet and bytes sent count.
+            nx_ipv6_packet_copy.c             Fixed copy length check for destination packet.
+            nx_ipv6_packet_send.c             Fixed checksum calculation when fragment is performed, optimized the logic.
+            nx_ipv6_prefix_list_delete_entry.c
+                                              Fixed IPv6 address when leave multicast group.
+            nx_ipv6_process_fragment_option.c Supported processing fragmentation immediately,
+                                                fixed the endian of offset flag before sending ICMPv6 error message.
+            nxd_ip_raw_packet_source_send.c   Fixed source address selection for IPv6.
+            nxd_ipv6_address_set.c            Fixed duplicate address set, fixed a bug when ip_address is null.
+            nxd_ipv6_default_router_add_internal.c
+                                              Checked router address whether it is reachable.
+            nxd_ipv6_default_router_get.c     Got index from interface.
+            nxd_ipv6_default_router_number_of_entries_get.c
+                                              Got index from interface.
+            nxd_ipv6_disable.c                Supported loopback address. Fixed a compiler error.
+            nxd_ipv6_enable.c                 Supported loopback address.
+            nxd_ipv6_interface_find.c         Fixed return status when there is no address in interface,
+                                                supported loopback address, checked interface link status.
+            nxd_ipv6_raw_packet_send_internal.c
+                                              Fixed source address selection for IPv6.
+            nxd_ipv6_stateless_address_autoconfig_enable.c
+                                              Reset the solicitation count.
+            nxd_ipv6_stateless_address_autoconfig_disable.c
+                                              Reset the solicitation count.
+            nxd_ipv6_multicast_interafce_leave.c
+                                              Fixed the bug that return success status when find the same entry.
+            nx_nd_cache.h                     Updated time of ND cache to RFC recommended values.
+            nx_nd_cache_add.c                 Protected cache with mutex nx_nd_cache_protection.
+            nx_nd_cache_find_entry.c          Removed the mutex release that is not necessary.
+            nx_nd_cache_find_entry_by_mac_addr.c
+                                              Fixed a bug that check the interface pointer before use.
+            nxd_nd_cache_entry_delete.c       Fixed a bug that mutex is not released before return.
+            nx_packet_copy.c                  Removed the size check to avoid failure to copy for chain packet.
+            nx_packet_data_extract_offset.c   Used memcpy to optmize data copy.
+            nx_packet_data_retrieve.c         Used memcpy to optmize data copy.
+            nx_packet_data_append.c           Fixed a bug that releases already released packet.
+            nx_packet_pool_create.c           Cleared pool structure before used.
+            nx_tcp_mss_option_get.c           Fixed endless loop when option length is not set.
+            nx_tcp_packet_process.c           Checked source address for syn packets that are queued.
+            nx_tcp_server_socket_relisten.c   Fixed a bug that syn_received_notify was not called.
+            nx_tcp_socket_delete.c            Not allowed to delete before resources are cleaned.
+            nx_tcp_socket_packet_process.c    Fixed a bug ACKs, URGs, RSTs should be processed even sequence
+                                                is out of window.
+            nx_tcp_socket_send.c:             Moved process logic to internal function.
+            nx_tcp_socket_send_internal.c     Fixed a bug when socket is not connected, supported
+                                                to send small segmentation when length of packet is less than window size.
+            nx_tcp_socket_state_ack_check.c   Fixed cwnd calculation. Fixed window size when ACK is duplicated.
+            nx_tcp_socket_state_data_check.c  Supported to limit the number of packets that are out of order.
+            nx_tcp_socket_state_transmit_check.c
+                                              Moved logic when window size is non zero to send internal function.
+            nx_tcp_transmit_cleanup.c         Removed adjusting sequence since packet in queue would
+                                                never contain TCP header.
+            nx_user.h                         Added definition for IP reassembly time,
+                                                added symbol that allow IP fragment reassemble immediately,
+                                                updated time of ND cache to RFC recommended values,
+                                                added source address check for incoming packet,
+                                                supported to limit the number of packets that are out of order.
+            nx_udp_packet_receive.c           Fixed the endian of UDP header before sending ICMPv6 error message.
+            nx_udp_socket_delete.c            Removed error checking that has been checked in nxe.
+            nx_udp_socket_receive.c           Set packet pointer to NULL if no packet was available.
+                                                Removed special process of all ones checksum.
+            nxd_udp_socket_send.c             Fixed source address selection for IPv6.
+            nxe_icmp_interface_ping6.c        Checked interface validity.
+            nxde_icmp_source_ping.c           Checked interface validity.
+            nxe_igmp_multicast_interface_join.c
+                                              Fixed the bug for IP protectio operation.
+            nxe_ip_gateway_address_set.c
+                                              Added the interface status check.
+            nxe_ip_interface_attach.c         Modified invalid IP address check.
+            nxe_ip_interface_physical_address_get.c
+                                              Fixed a dead recursive call bug.
+            nxe_ip_interface_status_check.c   Added interface validation checking.
+            nxde_ip_raw_packet_source_send.c  Fixed address_index check.
+            nxde_ipv6_stateless_address_autoconfig_enable.c
+                                              Modified the comment and fixed the bug.
+            nxde_ipv6_stateless_address_autoconfig_disable.c
+                                              Modified the comment and fixed the bug.
+            nxde_ipv6_multicast_interface_leave.c
+                                              Modified the comment and fixed the bug.
+            nxde_ipv6_multicast_interface_join.c
+                                              Modified the comment and fixed the bug.
+            nxde_ipv6_default_router_number_of_entries_get.c
+                                              Modified the comment and fixed the bug.
+            nxde_ipv6_default_router_get.c
+                                              Modified the comment and fixed the bug.
+            nxde_ipv6_default_router_entry_get.c
+                                              Modified the comment and fixed the bug.
+            nxde_ipv6_address_delete.c
+                                              Modified the comment and fixed the bug.
+            nxde_nd_cache_entry_set           Added the ID check for IP instance.
+            nxe_packet_release.c              Modified the return value.
+            nxe_packet_transmit_release.c     Modified the return value.
+            nxe_tcp_client_socket_connect.c   Added server address check,
+            nxe_tcp_socket_queue_depth_notify_set.c
+                                              Added input parameters check,
+            nxe_tcp_socket_receive_notify.c   Added input parameters check,
+            nxe_tcp_socket_transmit_configure.c
+                                              Added tcp feature check,
+            nxe_tcp_socket_window_update_notify_set.c
+                                              Added input parameters check,
+            nxe_udp_socket_source_send.c      Improved the error checking logic.
+            nx_ram_network_driver.c           Received special MAC address for IPv6 multicast address,
+                                              Correctly set the next IP.
+
+        Files added:
+            nx_ip_gateway_address_clear.c
+            nx_ip_interface_detach.c
+            nx_ip_packet_checksum_compute.c
+            nxe_ip_gateway_address_clear.c
+            nxe_ip_interface_detach.c
+
+
+
+
+
+01/31/2013  NetX Duo generic code version 5.7. This release includes the
+            following major features:
+
+
+        Files are modified to allow conditional compilation for IP fragmentation support:
+            nx_arp_dynamic_entry_set.c
+            nx_arp_packet_receive.c
+            nx_ip_fragment_disable.c
+            nx_ip_fragment_enable.c
+            nx_ip_fragment_packet.c
+            nx_ip_fragment_timeout_check.c
+            nx_ip_info_get.c
+            nx_ip_packet_send.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_process_fragment_option.c
+
+
+        Files are added or modified to support the interface capability feature:
+            nx_icmp_interface_ping6.c
+            nx_icmp_ping.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+            nx_igmp_multicast_leave.c
+            nx_igmp_packet_process.c
+            nx_igmp_periodic_processing.c
+            nx_ip_checksum_compute.c
+            nx_ip_interface_capability_get.c
+            nx_ip_interface_capability_set.c
+            nx_ip_fragment_packet.c
+            nx_ip_packet_send.c
+            nx_ip_thread_entry.c
+            nx_ipv4_packet_receive.c
+            nx_ipv6_packet_send.c
+            nx_packet_allocate.c
+            nx_packet_copy.c
+            nx_packet_release.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_rst.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_socket_send_internal.c
+            nx_udp_socket_receive.c
+            nxd_udp_socket_send.c
+            nxe_ip_interface_capability_get.c
+            nxe_ip_interface_capability_set.c
+
+
+        Files are modified to allow the chained packet feature to be removed:
+            nx_packet_allocate.c
+            nx_packet_copy.c
+            nx_packet_data_append.c
+            nx_packet_data_extract_offset.c
+            nx_packet_data_retrieve.c
+            nx_packet_release.c
+
+
+        Files are added or modified to support the IPv6 address change notify feature:
+            nx_icmpv6_DAD_failure.c
+            nx_icmpv6_perform_DAD.c
+            nx_icmpv6_process_ra.c
+            nx_ipv6_prefix_list_delete.c
+            nx_ipv6_prefix_list_delete_entry.c
+            nxd_ipv6_address_change_notify.c
+            nxd_ipv6_address_delete.c
+            nxd_ipv6_address_set.c
+            nxde_ipv6_address_change_notify.c
+
+
+        Files are added or modified to support the IP raw filter feature and
+        the raw receive queue depth feature:
+            nx_ip_raw_packet_enable.c
+            nx_ip_raw_packet_filter_set.c
+            nx_ip_raw_packet_processing.c
+            nx_ip_raw_receive_queue_max_set.c
+            nxe_ip_raw_packet_filter_set.c
+            nxe_ip_raw_receive_queue_max_set.c
+
+
+        Files are modified to reset the TCP internal timer when closing a socket:
+            nx_tcp_client_socket_unbind.c
+            nx_tcp_server_socket_accept.c
+            nx_tcp_server_socket_listen.c
+            nx_tcp_server_socket_relisten.c
+            nx_tcp_server_socket_unaccept.c
+            nx_tcp_server_socket_unlisten.c
+            nx_tcp_socket_state_fin_wait2.c
+            nx_tcp_socket_state_syn_received.c
+
+
+        Other modified files:
+          nx_arp_enable.c                         Cleaned up redundant logic.
+          nx_icmpv6_dest_table_add.c              Protected cache with mutex nx_nd_cache_protection.
+          nx_icmpv6_process_na.c                  Modified the logic to set incoming interface to be the
+                                                    address requested in the NA message.
+          nx_icmpv6_process_redirect.c            Protected cache with mutex nx_nd_cache_protection.
+          nx_icmpv6_send_queued_packets.c         Convert destination address to host byte order before
+                                                    calling nx_icmpv6_dest_table_find.
+          nx_igmp_periodic_processing.c           Fixed a bug preventing the loop from decrementing all
+                                                    group update times.
+          nx_ip_create.c                          Initializes the device table and the address table.
+          nx_ip_dispatch_process.c                Added upper layer protocol processing for IPv4
+          nx_ip_driver_direct_command.c           Modified function name
+          nx_ip_fragment_assembly.c               Simplified the logic by calling nx_ip_dispatch_process()
+                                                    for processing upper layer protocols.
+          nx_ip_fragment_packet.c                 Removed an extra alignment check
+          nx_ip_max_payload_size_find.c           Added a case for IPsec
+          nx_ip_raw_packet_source_send.c          Modified the constant for the raw packet type
+          nx_ip_raw_packet_send.c                 Modified the constant for the raw packet type
+          nx_ip_static_route_add.c                Record the physical interface the route is attached to.
+          nx_ipv4_packet_receive.c                Simplified the logic by calling nx_ip_dispatch_process()
+                                                    for processing upper layer protocols.
+          nx_ipv6_fragment_process.c              Fixed a compiler warning.
+          nx_ipv6_packet_receive.c                Added IPv6 multicast support
+          nx_ipv6_packet_send.c                   Fixed a bug in the logic that does the IPv6 address
+                                                    search, added a case where IPv6 address to MAC address
+                                                    mapping is not needed.
+          nx_ipv6_prefix_list_delete.c            Optimized the logic that computes the interface index.
+          nx_ipv6_util.c                          Fixed the all router multicast address.
+          nx_nd_cache_add.c                       Fixed compiler warnings, protected cache with mutex
+                                                    nx_nd_cache_protection.
+          nx_nd_cache_find_entry.c                Fixed a bug where an incorrect index value is used,
+                                                    removed mutex release that is not necessary.
+          nx_tcp_fast_periodic_processing.c       Fixed a bug that prevents TCP retry limit to be reached.
+          nx_tcp_no_connection_reset.c            Fixed for IPsec.
+          nx_tcp_packet_process.c                 Validate MSS value, validate IP address, added internal
+                                                    callback function.
+          nx_tcp_socket_disconnecte.c             Corrected TCP ACK number when sending a RST.
+          nx_tcp_socket_packet_process.c          Improved the handling of validating incoming TCP
+                                                    segments.
+          nx_tcp_socket_receive.c                 Corrected the logic checking the receive queue against
+                                                    the TCP socket state.
+          nx_tcp_socket_send.c                    Added logic to handle error status returned from
+                                                    nx_tcp_socket_internal to fix a packet leak.
+          nx_tcp_socket_state_ack_check.c         Fixed a bug determining if packets can be released from
+                                                    the queue when the transmit window wraps, also
+                                                    modified the return value.
+          nx_tcp_socket_state_data_check.c        Optimized the logic for handling incoming TCP data
+                                                    segments.
+          nx_tcp_socket_state_syn_received.c      Updated the acknowledged receive sequence.
+          nx_tcp_socket_state_syn_sent.c          Fixed a logic for invalid ACK check.
+          nx_udp_packet_receive.c                 Fixed compiler warnings.
+          nx_udp_socket_source_send.c             Removed redundant code.
+          nxd_ip_raw_packet_sourcee_send.c        Added additional parameters this service takes.
+          nxd_ip_raw_packet_send.c                Added additional parameters this service takes.
+          nxd_ipv6_address_get.c                  Simplified the logic that finds the address index.
+          nxd_ipv6_default_router_add_internal.c  Fixed compiler warning.
+          nxd_ipv6_interface_find.c               Added IPv6 multicast support, added a case where the
+                                                    destination address is an offlink address.
+          nxd_ipv6_router_solicitation_check.c    Cleaned up a line of statement.
+          nxd_nd_cache_entry_set.c                Bug fix: Use IPv6 address index to find physical
+                                                    interface.
+          nxd_udp_packet_info_extract.c           Simplified the logic that finds the interface index.
+          nxd_udp_socket_send.c                   Making sure the checksum is always generated for
+                                                    IPv6 packets.
+          nxd_udp_socket_source_send.c            Fixed the IP address detection logic.
+          nxde_ip_raw_packet_source_send.c        Added additional parameters this service takes.
+          nxde_ip_raw_packet_send.c               Added additional parameters this service takes.
+
+
+       Files added:
+          nx_ip_gateway_address_get.c
+          nx_ip_interafce_address_mapping_configure.c
+          nx_ip_interface_mtu_set.c
+          nx_ip_interface_physical_address_get.c
+          nx_ip_interface_physical_address_set.c
+          nx_tcp_socket_queue_depth_notify_set.c
+          nxd_ipv6_default_router_entry_get.c
+          nxd_ipv6_default_router_number_of_entries_get.c
+          nxd_ipv6_disable.c
+          nxd_ipv6_multicast_interface_join.c
+          nxd_ipv6_multicast_interafce_leave.c
+          nxd_ipv6_stateless_address_autoconfig_disable.c
+          nxd_ipv6_stateless_address_autoconfig_enable.c
+          nxde_ipv6_default_router_entry_get.c
+          nxde_ipv6_default_router_number_of_entries_get.c
+          nxde_ipv6_disable.c
+          nxde_ipv6_stateless_address_autoconfig_disable.c
+          nxde_ipv6_stateless_address_autoconfig_enable.c
+          nxde_ipv6_multicast_interface_join.c
+          nxde_ipv6_multicast_interface_leave.c
+          nxe_ip_gateway_address_get.c
+          nxe_ip_interface_mtu_set.c
+          nxe_ip_interface_physical_address_get.c
+          nxe_ip_interface_physical_address_set.c
+          nxe_tcp_socket_queue_depth_notify_set.c
+
+       Files renamed:
+
+               File Name in Release 5.6                              File Name in Release 5.7
+
+           nx_ip_raw_packet_interface_send.c                      nx_ip_raw_packet_source_send.c
+           nx_udp_socket_interface_send.c                         nx_udp_socket_source_send.c
+           nxd_ip_raw_packet_interface_send.c                     nxd_ip_raw_packet_source_send.c
+           nxd_udp_socket_interface_send.c                        nxd_udp_socket_source_send.c
+           nxd_icmp_interface_ping.c                              nxd_icmp_source_ping.c
+           nxe_ip_raw_packet_interface_send.c                     nxe_ip_raw_packet_source_send.c
+           nxe_udp_socket_interface_send.c                        nxe_udp_socket_source_send.c
+           nxde_ip_raw_packet_interface_send.c                    nxde_ip_raw_packet_source_send.c
+           nxde_udp_socket_interface_send.c                       nxde_udp_socket_source_send.c
+           nxde_icmp_interface_ping.c                             nxde_icmp_source_ping.c
+
+
+
+
+
+10/10/2011  NetX generic code version 5.6. This release includes the following major features:
+
+          * IPv4 and IPv6 multihome support
+          * TCP window scaling
+          * Allow applications to configure TCP Keep-alive feature on a per-socket basis
+          * Added support for TCP state change callback functions.
+          * Allow ICMP checksum operation to be removed
+          * Added support for IPsec
+
+        Files modified in order to support multihome
+            nx_api.h
+            nx_arp.h
+            nx_arp_dynamic_entries_invalidate.c
+            nx_arp_dynamic_entry_set.c
+            nx_arp_gratuitous_send.c
+            nx_arp_packet_receive.c
+            nx_arp_packet_send.c
+            nx_arp_periodic_update.c
+            nx_arp_static_entry_create.c
+            nx_icmp.h
+            nx_icmp_ping.c
+            nx_icmp_ping6.c
+            nx_icmpv6.h
+            nx_icmpv6_DAD_failure.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_process_ra.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_queued_packets.c
+            nx_icmpv6_send_rs.c
+            nx_icmpv5_packet_process.c
+            nx_igmp.h
+            nx_igmp_multicast_check.c
+            nx_igmp_multicast_join.c
+            nx_igmp_multicast_leave.c
+            nx_ip.h
+            nx_ip_create.c
+            nx_ip_delete.c
+            nx_ip_dispatch_process.c
+            nx_ip_driver_direct_command.c
+            nx_ip_fragment_packet.c
+            nx_ip_gateway_address_set.c
+            nx_ip_max_payload_size_find.c
+            nx_ip_packet_receive.c
+            nx_ip_packet_send.c
+            nx_ip_status_check.c
+            nx_ip_thread_entry.c
+            nx_ip_static_route_add.c
+            nx_ipv4.h
+            nx_ipv4_packet_receive.c
+            nx_ipv6.h
+            nx_ipv6_address_find_prefix.c
+            nx_ipv6_fragment_process.c
+            nx_ipv6_multicast.c
+            nx_ipv6_packet_receive.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_prefix_list_delete_entry.c
+            nx_nd_cache.h
+            nx_nd_cache_add.c
+            nx_packet_allocate.c
+            nx_packet_copy.c
+            nx_ram_network_driver.c
+            nx_tcp_fast_periodic_processing.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_ack.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_socket_mss_set.c
+            nx_tcp_socket_send.c
+            nx_tcp_socket_state_transmit_check.c
+            nx_udp.h
+            nx_udp_socket_create.c
+            nxd_ip_raw_packet_send.c
+            nxd_ipv6_default_router_add.c
+            nxd_ipv6_router_solicitation_check.c
+            nxd_nd_cache_entry_set.c
+            nxd_nd_cache_ip_address_find.c
+            nxd_udp_socket_send.c
+            nxde_ipv6_default_router_add.c
+            nxde_nd_cache_entry_set.c
+            nxde_nd_cache_ip_address_find.c
+            nxe_arp_gratuitous_send.c
+            nxe_igmp_multicast_join.c
+            nxe_ip_gateway_address_set.c
+            nxe_ip_status_check.c
+            nxe_tcp_socket_send.c
+
+        Files changed to allow optionally exclude the ICMPv6 Error Messages feature
+            nx_icmpv6.h
+            nx_icmpv6_send_error_message.c
+            nx_ip_dispatch_process.c
+            nx_ip_fragment_assembly.c
+            nx_ip_fragment_timeout_check.c
+            nx_ipv6_process_fragment_option.c
+            nx_ipv6_process_routing_option.c
+            nx_udp_packet_receive.c
+            nx_user.h
+
+        Files changed to support TCP window scaling:
+            nx_tcp.h
+            nx_tcp_mss_option_get.c
+            nx_tcp_packet_process.c
+            nx_tcp_packet_send_ack.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_socket_create.c
+            nx_tcp_socket_send.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_data_check.c
+            nx_tcp_socket_state_syn_sent.c
+            nx_tcp_socket_state_syn_received.c
+            nx_user.h
+            nxe_tcp_socket_create.c
+
+
+        Files changed to support per-socket keepalive option:
+            nx_tcp_periodic_processing.c
+            nx_tcp_socket_create.c
+            nx_tcp_socket_state_ack_check.c
+            nx_tcp_socket_state_established.c
+            nx_tcp_socket_state_syn_received.c
+            nx_tcp_socket_state_syn_sent.c
+
+        Files changed to support TCP state change callback functions:
+            nx_tcp.h
+            nx_tcp_socket_connection_reset.c
+            nx_tcp_socket_create.c
+            nx_tcp_socket_state_fin_wait1.c
+            nx_tcp_socket_state_fin_wait2.c
+            nx_tcp_socket_state_last_ack.c
+            nx_tcp_socket_state_syn_received.c
+
+        Added a check to make sure this function only operates on an entry owned by ip_ptr.
+            nx_nd_cache_fast_periodic_update.c
+            nx_nd_cache_find_entry_by_mac_addr.c
+            nx_nd_cache_find_entry_and_add.c
+            nx_nd_cache_find_entry.c
+            nx_nd_cache_slow_periodic_update.c
+
+        Files changed to allow ICMP checksum operation to be removed:
+            nx_icmp_ping.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_send_ns.c
+            nx_icmpv6_send_rs.c
+
+
+        Files changed to support IPsec:
+            nx_icmp_ping.c
+            nx_icmpv4_packet_process.c
+            nx_icmpv6_DAD_clear_NDCache_entry.c
+            nx_icmpv6_DAD_failure.c
+            nx_icmpv6_packet_process.c
+            nx_icmpv6_perform_DAD.c
+            nx_icmpv6_process_echo_reply.c
+            nx_icmpv6_process_echo_request.c
+            nx_icmpv6_process_na.c
+            nx_icmpv6_process_ns.c
+            nx_icmpv6_send_error_message.c
+            nx_icmpv6_validate_neighbor_message.c
+            nx_ip_dispatch_process.c
+            nx_ip_max_payload_size_find.c
+            nx_ip_packet_send.c
+            nx_ip_thread_entry.c
+            nx_ipv4_packet_receive.c
+            nx_ipv6_packet_send.c
+            nx_ipv6_perform_min_path_MTU_discovery.c
+            nx_packet_allocate.c
+            nx_packet_copy.c
+            nx_tcp_no_connection_reset.c
+            nx_tcp_packet_send_ack.c
+            nx_tcp_packet_send_fin.c
+            nx_tcp_packet_send_rst.c
+            nx_tcp_packet_send_syn.c
+            nx_tcp_socket_create.c
+            nx_tcp_socket_send_internal.c
+            nx_udp_packet_receive.c
+            nxd_udp_socket_send.c
+            nxe_ip_max_payload_size_find.c
+
+        Other modified files:
+            nx_api.h                              Added macro NX_PACKET_HEADER_PAD_SIZE to allow an application
+                                                  to specify the number of ULONG words padded towards the end of the
+                                                  NX_PACKET structure, giving the starting address of the paylaod
+                                                  area to a desired alignment.
+            nx_icmpv6_dest_table_find.c           Allowed this function to update the path MTU information
+            nx_icmpv6_destination_table_periodic_update.c
+                                                  Upadted the path MTU logic, optimized the search process
+            nx_icmpv6_perform_DAD.c               Added an option that allows caller to specify an IPv6 address for DAD.
+            nx_icmpv6_process_echo_reply.c        Added ICMP statistical counter, removed ICMP header before passing the packet
+                                                  to the thread
+            nx_icmpv6_process_na.c                Optimized the NA packet process
+            nx_icmpv6_process_ra.c                Optimized the destination table operation, added ICMP counters
+            nx_icmpv6_process_redirect.c          Added ICMP statistical counter, optimized internal operation
+            nx_igmp_loopback_disable.c            Added mutex protection
+            nx_igmp_loopback_enable.c             Added mutex protection
+            nx_igmp_packet_process.c              Allowed IGMP statistical counters to be compiled out,
+                                                  impoved the handling of IGMPv1 packets
+            nx_ip_address_change_notify.c         Added mutex protection
+            nx_ip_address_get.c                   Added mutex protection
+            nx_ip_address_set.c                   Added mutex protection
+            nx_ip_checksum_compute.c              Fixed a compiler warning when the IPv6 feature is not enabled
+            nx_ip_delete.c:                       Clear the nx_ip_id field after the IP internal is cleaned up.
+            nx_ip_gateway_address_set.c           Added missing mutex release if no interface found, allow the gateway to be cleared
+            nx_ip_fragment_assembly.c             Improved fragment matching per RFC 791, fixed a compiler warning
+            nx_ip_packet_receive.c                Added VOID* cast to avoid compiler warnings.
+            nx_ip_packet_send.c                   Added check for non null packet interface or next hop (e.g. gateway)
+                                                  Fixed a bug where the prepend_ptr was incorrectedly adjusted before
+                                                  calling nx_packet_transmit_release.
+            nx_ipv6.h                             Added and modified internal API prototypes
+            nx_ipv6_fragment_process.c            Release all fragments when discarding a fragment
+                                                  Added counter for total_fragments sent.
+            nx_ipv6_packet_send.c                 Fixed a bug where the prepend_ptr was incorrectedly adjusted before
+                                                  calling nx_packet_transmit_release.
+            nx_ipv6_util.h                        Optimized internal operations, added a check for the FF05:: multicast range
+            nx_ip_status_check.c:                 Added the configurable wait option NX_IP_STATUS_CHECK_WAIT_TIME
+            nx_ipv6_option_error.c                simplify the logic
+            nx_ipv6_packet_copy.c                 Fixed a compiler warning
+            nx_nd_cache_delete_internal.c         Optimized the destination table search process
+            nx_packet_release                     Removed an IPv6 conditional compilation so the IP version field is cleaned up
+            nx_rarp_packet_receive.c              Added initialization to avoid compiler warnings
+            nx_tcp_mss_option_get.c               Corrected the logic in the option length calculation.
+            nx_tcp_no_connection_reset.c          Added a parameter to indicate source IPv6 address to use when sending the RST packet.
+            nx_tcp_packet_send_ack.c              Skip TCP checksum calculation if the feature is turned off.
+            nx_tcp_packet_send_fin.c              Skip TCP checksum calculation if the feature is turned off.
+            nx_tcp_packet_send_rst.c              Skip TCP checksum calculation if the feature is turned off.
+            nx_tcp_packet_send_syn.c              Skip TCP checksum calculation if the feature is turned off.
+            nx_tcp_socket_packet_process.c        Added check for acceptable RST, moved TCP header optino process into nx_tcp_packet_process
+            nx_tcp_periodic_process.c             Added per-socket keep-alive feature.
+            nx_tcp_socket_receive                 Optimized internal logic, added netX trace event
+                                                  Modified logic to always return a packet in the receive queue regardless of the TCP socket state
+            nx_tcp_server_socket_accept.c         Clean up the socket data structure before responding to a new conenction.
+            nx_tcp_socket_state_closing.c         Validate the ACK and SEQ number before closing down the socket
+            nx_tcp_socket_state_ack_check.c       Fixed a corner case where the ACK number was incorrectly checked
+                                                  Fixed another corner case when determining if packets can be released from the transmit queue
+                                                  where the transmit window is wrapped.
+            nx_udp_packet_receive.c               Optimized internal operations
+            nx_udp_socket_bytes_available:        Modified output to error status if the socket port is not bound, corrected return value, fixed comiler warnings
+            nx_udp_socket_receive.c               Removed redundant calls to checksum
+            nx_user.h                             Added options to remove ICMP checksum computation
+            nxd_icmp_enable.c                     Added mutex protection, optimized initilization process
+            nxd_ipv6_find_max_prefix_length.c     Optimized the search algorithm
+            nxd_ipv6_prefix_router_timer_tick.c   Clean up the destination table when a router times out
+            nxd_ipv6_router_lookup.c              Check nd_cache_entry being valid before dereferencing it,
+            nxd_ipv6_router_solicitation_check.c  Check router entry valid before updating its timer value optimized the router table search algorithm
+            nxd_ipv6_search_onlink.c              Also search manually configured Ipv6 addresses for onlink nodes
+            nxd_nd_cache_entry_delete.c           Make sure the ND cache entry exists before deleting it, also invalidated the destination table entry
+            nxd_tcp_client_socket_connect.c       Do socket cleanup before sending the SYN packet
+            nxde_ip_raw_packet_send.c             Added more error checking logic
+            nxde_udp_socket_send.c                Added more error checking logic
+            nxe_ip_gateway_address_set.c          Removed a requirement that ARP be enabled before setting IPv4 gateway address and
+                                                  removed requirement that the service must be called from a thread
+            nxe_ip_max_payload_size_find.c        Replaced source address with an index to the source address
+            nxe_ip_static_route_add.c             Added a check to make sure the next hop address is directly reachable.
+            nxe_ip_static_route_delete.c          Removed unused code
+            nxe_packet_release.c                  Removed unreachable code
+            nxe_packet_transmit_release.c         Removed unreachable code
+
+
+        Files added:
+            demo_netx_duo_multihome_tcp.c
+            demo_netx_duo_multihome_udp.c
+            nx_icmp_interface_ping6.c
+            nx_icmpv6_dest_table_add.c
+            nx_icmpv6_process_packet_too_big.c
+            nx_igmp_multicast_interface_join.c
+            nx_ip_driver_interface_direct_command.c
+            nx_ip_interface_address_get.c
+            nx_ip_interface_address_set.c
+            nx_ip_interface_attach.c
+            nx_ip_interface_info_get.c
+            nx_ip_interface_status_check.c
+            nx_ip_raw_packet_interface_send.c
+            nx_ip_route_find.c
+            nx_nd_cache_add_entry.c
+            nx_packet_data_extract_offset.c
+            nx_tcp_socket_disconnect_complete_notify.c
+            nx_tcp_socket_establish_notify.c
+            nx_tcp_socket_send_internal.c
+            nx_tcp_socket_timed_wait_callback.c
+            nx_tcp_window_scaling_option_get.c
+            nx_udp_packet_info_extract.c
+            nx_udp_socket_interface_send.c
+            nxd_icmp_interface_ping.c
+            nxd_ip_raw_packet_interface_send.c
+            nxd_ipv6_address_delete.c
+            nxd_ipv6_address_get.c
+            nxd_ipv6_address_set.c
+            nxd_ipv6_default_router_get.c
+            nxd_udp_socket_interface_send.c
+            nxde_icmp_interface_ping.c
+            nxde_ip_raw_packet_interface_send.c
+            nxde_ipv6_address_delete.c
+            nxde_ipv6_address_get.c
+            nxde_ipv6_address_set.c
+            nxde_ipv6_default_router_get.c
+            nxde_udp_packet_info_extract.c
+            nxde_udp_socket_interface_send.c
+            nxe_icmp_interface_ping6.c
+            nxe_igmp_multicast_interface_join.c
+            nxe_ip_driver_interface_direct_command.c
+            nxe_ip_interface_address_get.c
+            nxe_ip_interface_address_set.c
+            nxe_ip_interface_attach.c
+            nxe_ip_interface_info_get.c
+            nxe_ip_interface_status_check.c
+            nxe_ip_raw_packet_interface_send.c
+            nxe_packet_data_extract_offset.c
+            nxe_tcp_socket_disconnect_complete_notify.c
+            nxe_tcp_socket_establish_notify.c
+            nxe_tcp_socket_timed_wait_callback.c
+            nxe_udp_packet_info_extract.c
+            nxe_udp_socket_interface_send.c
+
+
+        Files removed:
+            nx_icmpv6_dest_table_find_and_add.c
+            nx_icmpv6_dest_table_find_and_add.c
+            nx_ip_static_routing_disable.c
+            nx_ip_static_routing_enable.c
+            nx_ipv6_process_packet_too_big.c
+            nx_nd_cache_find_entry_and_add.c
+            nxd_ipv6_interface_address_get.c
+            nxd_ipv6_interface_address_set.c
+            nxd_ipv6_linklocal_address_get.c
+            nxd_ipv6_linklocal_address_set.c
+            nxd_udp_socket_set_interface.c
+            nxde_ipv6_interface_address_get.c
+            nxde_ipv6_interface_address_set.c
+            nxde_ipv6_linklocal_address_get.c
+            nxde_ipv6_linklocal_address_set.c
+            nxde_udp_socket_set_interface.c
+            nxe_ip_static_routing_disable.c
+            nxe_ip_static_routing_enable.c,
+
+
+06/01/2010  NetX generic code version 5.5. This release includes the following major features:
+            Path MTU Discovery and IPv6 Advertised Link MTU
+            Internal debug modules removed (replaced with TraceX events)
+
+            Other modifications are:
+
+            nx_icmpv6_process_ra.c                   Path MTU support
+                                                     Fixed bug in Neighbor Discovery cache processing
+            nx_icmpv6_process_redirect.c             Path MTU support
+            nx_icmpv6_send_error_message.c           Path MTU support
+            nx_icmpv6_send_queued_packets.c          Path MTU support
+                                                     Fixed a bug where NA packet is received how queued packets requiring fragmentation are sent
+            nx_ip_static_route_add.c                 Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
+            nx_ip_static_route_delete.c              Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
+            nx_ip_static_route_find.c                Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
+            nx_ip_static_route_enable.c              Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
+            nx_ip_static_route_disable.c             Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
+            nx_ip_thread_entry.c                     Path MTU support
+            nx_ipv6_packet_send.c                    Path MTU support
+                                                     Added a check if source and destination IP addresses are the same as part of Denial of service attack,
+                                                     Added check for suitable next hop; no packet transmitted if not found by routing algorithm */
+                                                     Fixed bug how multicast packets are detected
+            nx_tcp_packet_process.c                  Modified RST packets sent in response to invalid data packets to include proper ACK number
+            nx_tcp_packet_send_rst.c                 Send a RST with proper ACK number in response to invalid data packet.
+            nx_tcp_socket_packet_process.c           Removed duplicate logic that detects and sets MSS number from peer
+                                                     Added logic for sending ACKs for out-of-order packet
+                                                     Added check for duplicated SYNs
+            nx_tcp_socket_state_data_check.c         Modified to send ACKs for out-of-order data packets
+                                                     modified handling invalid RST control message
+                                                     Added check for duplicated incoming SYNs
+                                                     Fixed bug (corner case) handling overlapping sequence numbers
+                                                     Make _nx_tcp_socket_state_data_trim and _nx_tcp_socket_state_data_trim_front
+                                                     non-static function.
+            nx_tcp_socket_state_syn_sent.c           Modified detection and handling of unacceptable ACK before sending RST packet
+            nxd_icmp_enable.c                        Path MTU support
+            nxd_ipv6_enable.c                        Replaced literal router solicitation parameters with macros defined in nx_user.h
+            nxd_ipv6_find_max_prefix_length.c        Optimized the prefix match algorithm
+            nxd_udp_socket_send.c                    Corrected placement of IPSec ENABLED conditional code,
+                                                     Added check for IPv6 logical outgoing interface
+            nxe_ip_static_routing_disable.c          Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
+            nxe_ip_static_routing_enable.c           Renamed define NX_IP_STATIC_ROUTING_SUPPORTED to NX_ENABLE_IP_STATIC_ROUTING
+            nx_icmpv6.h                              Path MTU support
+            nx_nd_cache.h                            Removed unused defines for Router and ND protocols
+            nx_user.h                                Added #defines for router solicitation parameters
+                                                     Added NX_PACKET_HEADER_PAD_SIZE to pad towards the end of the NX_PACKET structure.
+
+
+11/23/2009  NetX generic code version 5.4. This release includes the following major features:
+            Multiple IPv6 address support added
+            Path MTU and IPv6 Advertised Link MTU support removed
+
+            Other modifications are:
+
+            nx_ip_fragment_assembly.c                 Added check for invalid length (exceed maximum size limit)
+            nx_ip_max_payload_size.c                  New API:computes max packet payload that will not require fragmentation
+            nx_ip_packet_send.c                       Corrected NX_IP_LIMITIED_BROADCAST to NX_IP_LIMITED_BROADCAST as destination IP
+            nx_ipv6_packet_receive.c                  Added support for multiple IPv6 addresses
+            nx_ipv6_packet_send.c                     Made packet fragmentation conditional; if not enabled and fragmentation is required drop the packet
+                                                      Added mutex protection around Neighbor Discovery cache table operations
+            nx_ipv6_utils.c                           Fixed bug in IPv6_Address_Type() for detecting multicast address type
+            nx_tcp_no_connection_reset.c              For socket in CLOSED state, RST packet sequence number set to incoming ACK number
+            nx_tcp_fast_periodic_processing.c         Replaced reference to primary IP global address with transmit socket outgoing interface address
+            nx_tcp_packet_process.c                   Added call to nxd_tcp_no_connection_reset depending if IPv6 is enabled on the IP instance if a RST
+                                                      must be sent
+                                                      Update the socket outgoing interface to the received packet interface
+            nx_tcp_packet_send_ack.c                  Added support for multiple IPv6 addresses
+            nx_tcp_packet_send_fin.c                  Added support for multiple IPv6 addresses
+            nx_tcp_packet_send_rst.c                  Added support for multiple IPv6 addresses
+            nx_tcp_packet_send_syn.c                  Added support for multiple IPv6 addresses
+            nx_tcp_socket_create.c                    Initialize socket outgoing interface with NULL instead of IP global address
+            nx_tcp_socket_send.c                      Added support for multiple IPv6 addresses
+            nx_tcp_socket_state_data_check.c          Fixed minor compiler warning with conditional coding around IP block pointer declaration
+            nx_tcp_socket_state_transmit_check.c      Renamed nx_tcp_window_update_callback_notify with nx_tcp_socket_window_update_notify
+                                                      Added support for multiple IPv6 addresses
+            nx_tcp_socket_window_update_notify_set.c  Renamed file from  nx_tcp_socket_window_notify to nx_tcp_socket_window_notify_set
+            nx_udp_socket_create.c                    Initialize socket outgoing interface with NULL instead of IP global address
+            nx_udp_socket_receive.c                   Corrected placement of conditional #defines around extracting packet source and destination address
+            nx_udp_source_extract.c                   Modified for performing IPv4 packet extraction only
+            nxd_icmp_enable.c                         Removed path MTU support
+            nxd_icmp_ping.c                           Added check for IPv6 enabled for sending IPv6 echo request packets
+            nxd_ipv6_enabled.c                        Send an error status return if not IPv6 enabled
+            nxd_ipv6_find_max_prefix_length.c         New function: finds the longest matching prefix between two IPv6 addresses
+            nxd_ipv6_interface_address_get.c          New API: returns IPv6 address and prefix length based in the input interface index
+            nxd_ipv6_interface_address_set.c          New API: Sets the IPv6 address and prefix length of the input interface index
+            nxd_ipv6_interface_find.c                 Added multiple IPv6 address support
+            nxd_ipv6_linklocal_address_get.c          Replace reference to obsoleted IP link local address with IP instance zero index interface (designated
+                                                      link local)
+            nxd_ipv6_linklocal_address_get.c          Replace reference to obsoleted IP link local address with IP instance zero index interface (designated
+                                                      link local)
+            nxd_ipv6_raw_packet_send_internal.c       Added check for valid IP instance outgoing interface for packet destination
+            nx_nd_cache_entry_delete.c                Added TraceX support
+            nxd_tcp_client_socket_connect.c           Added support for multiple IPv6 addresses
+            nxd_tcp_socket_peer_info_get.c            Added TraceX support
+            nxd_udp_socket_send.c                     Added support for multiple IPv6 addresses
+            nxd_udp_socket_set_interface.c            Added support for multiple IPv6 addresses
+            nxd_udp_source_extract.c                  Optimized the logic for retrieving the IP address
+            nxde_ipv6_default_router_add.c            Updated call to nxd_ipv6_default_router_add() based on changes to that function
+            nxde_udp_source_extract.c                 Added check for packet with invalid IP header
+            nxe_udp_source_extract.c                  Added check for packet with invalid IP header
+            nx_nd_cache.h                             Declared two new API, _nxd_nd_cache_entry_delete and _nxd_nd_cache_entry_set
+            nx_tcp.h                                  Declared new API, _nxd_tcp_no_connection_reset
+            nx_user.h                                 Removed NX_DISABLE_IPV6_PATH_MTU_DISCOVERY
+
+
+
+08/03/2009  NetX generic code version 5.3. This release includes the following major features:
+            Trace Events support
+            IPSec support
+            IGMP version 2 support
+
+            Other modifications are:
+
+            nx_igmp_enable.c                        IGMPv2 support
+            nx_igmp_multicast_leave.c               IGMPv2 support
+            nx_igmp_packet_process.c                IGMPv2 support
+            nx_igmp_periodic_processing.c           IGMPv2 support
+            nx_ip_checksum_compute.c                When adding last byte to the checksum,
+                                                    cast the byte to unsigned short
+            nx_ip_fragment_assembly.c               Fixed a packet size computation bug
+            nx_ip_packet_send.c                     Use nx_ip_packet_deferred_receive for loopback
+            nx_ipv6_packet_send.c                   Use nx_ip_packet_deferred_receive for loopback
+            nx_ip_thread_entry.c                    Added IPv6 destination table support
+            nx_tcp_socket_state_data_check.c        Optimized TCP out-of-order data receive logic
+                                                    Added support for TCP congestion avoidance
+            nx_tcp_socket_state_syn_received.c      Added support for TCP congestion avoidance
+            nx_tcp_socket_state_syn_sent.c          Added support for TCP congestion avoidance
+            nx_tcp_socket_state_transmit_check.c    Added support for TCP congestion avoidance
+            nx_tcp_socket_windows_update_notify.c   Added support for TCP congestion avoidance
+            nxd_tcp_client_socket_connect.c         Revised TCP loopback connection handling
+            nx*.h                                   Modified comment(s).
+            nx*.c                                   Modified comment(s).
+
+12/30/2007  Initial NetX Duo generic code version 5.2. This release is based on NetX 5.1 for IPv4 support,
+            with features developed for IPv6.
+            
+
+2. NetXDuo Secure
+
+08/15/2019  NX Secure generic code version 5.12. This release includes the
+            following major features:
+
+        Files are modified to store cipher suite pointer in the session:
+            nx_secure_dtls_hash_record.c
+            nx_secure_dtls_process_clienthello.c
+            nx_secure_dtls_send_serverhello.c
+            nx_secure_dtls_server_handshake.c
+            nx_secure_dtls_verify_mac.c
+            nx_secure_tls.h
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_generate_premaster_secret.c
+            nx_secure_tls_hash_record.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_process_server_key_exchange.c
+            nx_secure_tls_process_serverhello.c
+            nx_secure_tls_process_serverhello_extensions.c
+            nx_secure_tls_record_hash_calculate.c
+            nx_secure_tls_record_hash_initialize.c
+            nx_secure_tls_record_hash_update.c
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_record_payload_encrypt.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_send_record.c
+            nx_secure_tls_send_server_key_exchange.c
+            nx_secure_tls_send_serverhello.c
+            nx_secure_tls_server_handshake.c
+            nx_secure_tls_session_iv_size_get.c
+            nx_secure_tls_session_keys_set.c
+            nx_secure_tls_session_reset.c
+            nx_secure_tls_verify_mac.c
+
+        Files are modified to optimize RAM usage for remote certificates by
+        utilizing otherwise unused space in the TLS packet reassembly buffer
+        and parsing the certificates directly within the reassembly buffer:
+            nx_secure_tls.h    
+            nx_secure_tls_process_record.c    
+            nx_secure_tls_process_remote_certificate.c    
+            nx_secure_tls_remote_certificate_allocate.c    
+            nx_secure_tls_remote_certificate_free_all.c    
+            nx_secure_tls_session_packet_buffer_set.c
+            nx_secure_tls_session_receive_records.c    
+            nx_secure_tls_session_x509_client_verify_configure.c    
+            nx_secure_x509.h    
+            nxe_secure_tls_session_x509_client_verify_configure.c    
+
+        Files are modified to add TLS session intialization checking:
+            nx_secure_tls.h
+            nx_secure_tls_session_create.c
+            nx_secure_tls_session_delete.c
+            nx_secure_tls_session_reset.c
+            nxe_secure_dtls_client_protocol_version_override.c
+            nxe_secure_dtls_client_session_start.c
+            nxe_secure_dtls_packet_allocate.c
+            nxe_secure_dtls_psk_add.c
+            nxe_secure_dtls_server_session_send.c
+            nxe_secure_dtls_server_session_start.c
+            nxe_secure_dtls_session_client_info_get.c
+            nxe_secure_dtls_session_end.c
+            nxe_secure_dtls_session_local_certificate_add.c
+            nxe_secure_dtls_session_local_certificate_remove.c
+            nxe_secure_dtls_session_receive.c
+            nxe_secure_dtls_session_reset.c
+            nxe_secure_dtls_session_send.c
+            nxe_secure_dtls_session_start.c
+            nxe_secure_dtls_session_trusted_certificate_add.c
+            nxe_secure_dtls_session_trusted_certificate_remove.c
+            nxe_secure_tls_active_certificate_set.c
+            nxe_secure_tls_client_psk_set.c
+            nxe_secure_tls_local_certificate_add.c
+            nxe_secure_tls_local_certificate_find.c
+            nxe_secure_tls_local_certificate_remove.c
+            nxe_secure_tls_packet_allocate.c
+            nxe_secure_tls_psk_add.c
+            nxe_secure_tls_remote_certificate_allocate.c
+            nxe_secure_tls_remote_certificate_buffer_allocate.c
+            nxe_secure_tls_remote_certificate_free_all.c
+            nxe_secure_tls_server_certificate_add.c
+            nxe_secure_tls_server_certificate_find.c
+            nxe_secure_tls_server_certificate_remove.c
+            nxe_secure_tls_session_alert_value_get.c
+            nxe_secure_tls_session_certificate_callback_set.c
+            nxe_secure_tls_session_client_callback_set.c
+            nxe_secure_tls_session_client_verify_disable.c
+            nxe_secure_tls_session_client_verify_enable.c
+            nxe_secure_tls_session_end.c
+            nxe_secure_tls_session_packet_buffer_set.c
+            nxe_secure_tls_session_protocol_version_override.c
+            nxe_secure_tls_session_receive.c
+            nxe_secure_tls_session_renegotiate.c
+            nxe_secure_tls_session_renegotiate_callback_set.c
+            nxe_secure_tls_session_reset.c
+            nxe_secure_tls_session_send.c
+            nxe_secure_tls_session_server_callback_set.c
+            nxe_secure_tls_session_sni_extension_parse.c
+            nxe_secure_tls_session_sni_extension_set.c
+            nxe_secure_tls_session_start.c
+            nxe_secure_tls_session_time_function_set.c
+            nxe_secure_tls_session_x509_client_verify_configure.c
+            nxe_secure_tls_trusted_certificate_add.c
+            nxe_secure_tls_trusted_certificate_remove.c
+
+
+        Files are modified to fix DTLS version handling:
+            nx_secure_dtls_send_clienthello.c
+            nx_secure_dtls_send_helloverifyrequest.c
+            nx_secure_dtls_server_handshake.c
+            nx_secure_dtls_session_start.c
+
+        Files are modified to improve informational error return codes for 
+        easier debugging of TLS errors:
+            nx_secure_dtls_client_handshake.c    
+            nx_secure_dtls_process_clienthello.c    
+            nx_secure_dtls_send_clienthello.c    
+            nx_secure_dtls_send_serverhello.c    
+            nx_secure_dtls_server_handshake.c    
+            nx_secure_tls.h    
+            nx_secure_tls_map_error_to_alert.c    
+            nx_secure_tls_process_client_key_exchange.c    
+            nx_secure_tls_process_finished.c    
+            nx_secure_tls_process_server_key_exchange.c    
+            nx_secure_tls_process_serverhello_extensions.c    
+            nx_secure_tls_server_handshake.c    
+            nx_secure_tls_ecc_generate_premaster_secret.c    
+            nx_secure_tls_ecc_process_certificate_verify.c    
+            nx_secure_tls_ecc_process_client_key_exchange.c    
+            nx_secure_tls_ecc_process_server_key_exchange.c    
+            nx_secure_tls_ecc_send_certificate_verify.c    
+            nx_secure_tls_ecc_send_server_key_exchange.c    
+
+        Files are added or modified for the new API 
+        "nx_secure_tls_session_alert_value_get":
+            nx_secure_dtls_process_record.c
+            nx_secure_tls.h    
+            nx_secure_tls_api.h    
+            nx_secure_tls_session_alert_value_get.c    
+            nx_secure_tls_session_start.c
+            nxe_secure_tls_session_alert_value_get.c
+     
+        Files are modified to provide consistent error checking of return
+        values from generic NX_CRYPTO cipher routine APIs:
+            nx_secure_dtls_hash_record.c
+            nx_secure_tls_client_handshake.c
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_handshake_hash_init.c
+            nx_secure_tls_hash_record.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_server_handshake.c
+            nx_secure_tls_session_keys_set.c
+            nx_secure_tls_session_reset.c
+            nx_secure_x509_certificate_verify.c
+            nx_secure_x509_crl_verify.c
+            
+        Files are modified to improve the error return code when the
+        TLS crypto key buffer is too small for the chosen ciphersuite:
+            nx_secure_tls.
+            nx_secure_tls_session_keys_set.c
+
+        Files are modified to improve packet length verification:
+            nx_secure_dtls_send_clienthello.c
+            nx_secure_dtls_send_serverhello.c
+            nx_secure_tls_ecc_generate_keys.c
+            nx_secure_tls_ecc_send_client_key_exchange.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_send_clienthello.c
+            nx_secure_tls_send_serverhello.c
+
+        Files are modified to add caller checking:
+            nxe_secure_tls_active_certificate_set.c
+            nxe_secure_tls_client_psk_set.c
+            nxe_secure_tls_local_certificate_add.c
+            nxe_secure_tls_local_certificate_find.c
+            nxe_secure_tls_local_certificate_remove.c
+            nxe_secure_tls_metadata_size_calculate.c
+            nxe_secure_tls_packet_allocate.c
+            nxe_secure_tls_psk_add.c
+            nxe_secure_tls_remote_certificate_allocate.c
+            nxe_secure_tls_remote_certificate_buffer_allocate.c
+            nxe_secure_tls_remote_certificate_free_all.c
+            nxe_secure_tls_server_certificate_add.c
+            nxe_secure_tls_server_certificate_find.c
+            nxe_secure_tls_server_certificate_remove.c
+            nxe_secure_tls_session_certificate_callback_set.c
+            nxe_secure_tls_session_client_callback_set.c
+            nxe_secure_tls_session_client_verify_disable.c
+            nxe_secure_tls_session_client_verify_enable.c
+            nxe_secure_tls_session_create.c
+            nxe_secure_tls_session_delete.c
+            nxe_secure_tls_session_end.c
+            nxe_secure_tls_session_packet_buffer_set.c
+            nxe_secure_tls_session_protocol_version_override.c
+            nxe_secure_tls_session_receive.c
+            nxe_secure_tls_session_renegotiate.c
+            nxe_secure_tls_session_renegotiate_callback_set.c
+            nxe_secure_tls_session_reset.c
+            nxe_secure_tls_session_send.c
+            nxe_secure_tls_session_server_callback_set.c
+            nxe_secure_tls_session_sni_extension_parse.c
+            nxe_secure_tls_session_sni_extension_set.c
+            nxe_secure_tls_session_start.c
+            nxe_secure_tls_session_time_function_set.c
+            nxe_secure_tls_session_x509_client_verify_configure.c
+            nxe_secure_tls_trusted_certificate_add.c
+            nxe_secure_tls_trusted_certificate_remove.c
+            nxe_secure_x509_certificate_initialize.c
+            nxe_secure_x509_common_name_dns_check.c
+            nxe_secure_x509_crl_revocation_check.c
+            nxe_secure_x509_dns_name_initialize.c
+            nxe_secure_x509_extended_key_usage_extension_parse.c
+            nxe_secure_x509_extension_find.c
+            nxe_secure_x509_key_usage_extension_parse.c
+
+        Files are modified to fix static anaylsis reports:
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_process_remote_certificate.c
+            nx_secure_tls_session_packet_buffer_set.c
+            nx_secure_tls_ecc_generate_keys.c
+            nx_secure_tls_ecc_send_server_key_exchange.c
+
+        Files are modified to correct self-signed certificate verification
+        and support duplicate certificates sent by a remote host:
+            nx_secure_tls_process_remote_certificate.c
+            nx_secure_x509_certificate_chain_verify.c
+
+        Files are modified to provide RFC 7507 version fallback SCSV support:
+            nx_secure_tls_process_clienthello.c
+            nx_secure_dtls_process_clienthello.c
+            nx_secure_dtls_send_clienthello.c
+            nx_secure_tls.h
+            nx_secure_tls_map_error_to_alert.c
+            nx_secure_tls_newest_supported_version.c
+            nx_secure_tls_protocol_version_get.c
+            nx_secure_tls_send_clienthello.c
+            nx_secure_tls_send_serverhello_extensions.c
+            nx_secure_tls_session_reset.c            
+
+        Files are modified to improve packet length verification:
+            nx_secure_dtls_allocate_handshake_packet.c
+            nx_secure_dtls_packet_allocate.c
+            nx_secure_dtls_process_record.c
+            nx_secure_dtls_process_receive_callback.c
+            nx_secure_dtls_send_helloverifyrequest.c
+            nx_secure_dtls_send_record.c
+            nx_secure_dtls_send_serverhello.c
+            nx_secure_dtls_session_end.c
+            nx_secure_dtls_session_receive.c
+            nx_secure_dtls_session_start.c
+            nx_secure_tls.h
+            nx_secure_tls_allocate_handshake_packet.c
+            nx_secure_tls_client_psk_set.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_generate_premaster_secret.c
+            nx_secure_tls_packet_allocate.c
+            nx_secure_tls_process_clienthello_extensions.c
+            nx_secure_tls_process_serverhello.c
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_send_certificate.c
+            nx_secure_tls_send_certificate_request.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_changecipherspec.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_send_clienthello.c
+            nx_secure_tls_send_clienthello_extensions.c
+            nx_secure_tls_send_finished.c
+            nx_secure_tls_send_record.c
+            nx_secure_tls_send_server_key_exchange.c
+            nx_secure_tls_send_serverhello.c
+            nx_secure_tls_send_serverhello_extensions.c
+            nx_secure_tls_session_receive_records.c
+            nx_secure_tls_verify_mac.c
+
+        Files are modified to add buffer boundary checking in ASN.1 parsing:
+            nx_secure_x509.c
+            nx_secure_x509.h
+            nx_secure_x509_asn1_tlv_block_parse.c
+            nx_secure_x509_certificate_revocation_list_parse.c
+            nx_secure_x509_crl_revocation_check.c
+            nx_secure_x509_distinguished_name_parse.c
+            nx_secure_x509_extended_key_usage_extension_parse.c
+            nx_secure_x509_extension_find.c
+            nx_secure_x509_key_usage_extension_parse.c
+            nx_secure_x509_pkcs1_rsa_private_key_parse.c
+            nx_secure_x509_pkcs7_decode.c
+            nx_secure_x509_subject_alt_names_find.c
+
+        Files are added to support DTLS:
+            nx_secure_dtls.h
+            nx_secure_dtls_api.h
+            nx_secure_dtls_allocate_handshake_packet.c
+            nx_secure_dtls_client_handshake.c
+            nx_secure_dtls_client_protocol_version_override.c
+            nx_secure_dtls_client_session_start.c
+            nx_secure_dtls_hash_record.c
+            nx_secure_dtls_initialize.c
+            nx_secure_dtls_packet_allocate.c
+            nx_secure_dtls_process_clienthello.c
+            nx_secure_dtls_process_handshake_header.c
+            nx_secure_dtls_process_header.c
+            nx_secure_dtls_process_helloverifyrequest.c
+            nx_secure_dtls_process_record.c
+            nx_secure_dtls_psk_add.c
+            nx_secure_dtls_receive_callback.c
+            nx_secure_dtls_retransmit.c
+            nx_secure_dtls_retransmit_queue_flush.c
+            nx_secure_dtls_send_clienthello.c
+            nx_secure_dtls_send_handshake_record.c
+            nx_secure_dtls_send_helloverifyrequest.c
+            nx_secure_dtls_send_record.c
+            nx_secure_dtls_send_serverhello.c
+            nx_secure_dtls_server_create.c
+            nx_secure_dtls_server_delete.c
+            nx_secure_dtls_server_handshake.c
+            nx_secure_dtls_server_local_certificate_add.c
+            nx_secure_dtls_server_local_certificate_remove.c
+            nx_secure_dtls_server_notify_set.c
+            nx_secure_dtls_server_protocol_version_override.c
+            nx_secure_dtls_server_psk_add.c
+            nx_secure_dtls_server_session_send.c
+            nx_secure_dtls_server_session_start.c
+            nx_secure_dtls_server_start.c
+            nx_secure_dtls_server_stop.c
+            nx_secure_dtls_server_trusted_certificate_add.c
+            nx_secure_dtls_server_trusted_certificate_remove.c
+            nx_secure_dtls_server_x509_client_verify_configure.c
+            nx_secure_dtls_server_x509_client_verify_disable.c
+            nx_secure_dtls_session_cache.c
+            nx_secure_dtls_session_client_info_get.c
+            nx_secure_dtls_session_create.c
+            nx_secure_dtls_session_delete.c
+            nx_secure_dtls_session_end.c
+            nx_secure_dtls_session_local_certificate_add.c
+            nx_secure_dtls_session_local_certificate_remove.c
+            nx_secure_dtls_session_receive.c
+            nx_secure_dtls_session_reset.c
+            nx_secure_dtls_session_send.c
+            nx_secure_dtls_session_start.c
+            nx_secure_dtls_session_trusted_certificate_add.c
+            nx_secure_dtls_session_trusted_certificate_remove.c
+            nx_secure_dtls_verify_mac.c
+            nxe_secure_dtls_client_protocol_version_override.c
+            nxe_secure_dtls_client_session_start.c
+            nxe_secure_dtls_packet_allocate.c
+            nxe_secure_dtls_psk_add.c
+            nxe_secure_dtls_server_create.c
+            nxe_secure_dtls_server_delete.c
+            nxe_secure_dtls_server_local_certificate_add.c
+            nxe_secure_dtls_server_local_certificate_remove.c
+            nxe_secure_dtls_server_notify_set.c
+            nxe_secure_dtls_server_protocol_version_override.c
+            nxe_secure_dtls_server_psk_add.c
+            nxe_secure_dtls_server_session_send.c
+            nxe_secure_dtls_server_session_start.c
+            nxe_secure_dtls_server_start.c
+            nxe_secure_dtls_server_stop.c
+            nxe_secure_dtls_server_trusted_certificate_add.c
+            nxe_secure_dtls_server_trusted_certificate_remove.c
+            nxe_secure_dtls_server_x509_client_verify_configure.c
+            nxe_secure_dtls_server_x509_client_verify_disable.c
+            nxe_secure_dtls_session_client_info_get.c
+            nxe_secure_dtls_session_create.c
+            nxe_secure_dtls_session_delete.c
+            nxe_secure_dtls_session_end.c
+            nxe_secure_dtls_session_local_certificate_add.c
+            nxe_secure_dtls_session_local_certificate_remove.c
+            nxe_secure_dtls_session_receive.c
+            nxe_secure_dtls_session_reset.c
+            nxe_secure_dtls_session_send.c
+            nxe_secure_dtls_session_start.c
+            nxe_secure_dtls_session_trusted_certificate_add.c
+            nxe_secure_dtls_session_trusted_certificate_remove.c
+
+        Files are modified to fix compiler errors when NX_SECURE_X509_DISABLE_CRL is defined:
+            nx_secure_x509.h
+            nx_secure_x509_certificate_revocation_list_parse.c
+            nx_secure_x509_crl_revocation_check.c
+            nx_secure_x509_crl_verify.c
+            nx_secure_x509_ecc_certificate_revocation_list_parse.c
+            nx_secure_x509_ecc_crl_verify.c
+
+        Files are modified to support AES-GCM cipher:
+            nx_secure_crypto_method_self_test_aes.c
+            nx_secure_crypto_table_self_test.c
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_record_payload_encrypt.c
+
+        Files are modified to fix swapped PSK identity and hint parameters
+          when sending to the remote host:
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_send_server_key_exchange.c
+
+        Files are modified to fix Session ID handling problem (session ID
+          length is always 0 in the initial ServerHello):
+            nx_secure_tls_send_serverhello.c
+
+        Files are modified to update scratch buffers to support the new
+          default 4096-bit RSA key size:
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_client_key_exchange.c
+
+        Files are modified to fix issue with processing CertificateVerify
+          messages in a TLS Server with Client X.509 Certificate
+          verification enabled:
+            nx_secure_tls_process_remote_certificate.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_remote_certificate_verify.c
+            nx_secure_tls_server_handshake.c
+
+        Files are added to support new API for allocating buffer space
+          for incoming remote certificates:
+            nx_secure_tls_remote_certificate_buffer_allocate.c
+            nxe_secure_tls_remote_certificate_buffer_allocate.c
+
+        Files are modified to support new API for allocating buffer space
+          for incoming remote certificates:
+            nx_secure_tls.h
+            nx_secure_tls_api.h
+
+        Files are added to support new API for configuring Client X.509
+          authentication for TLS servers:
+            nx_secure_tls_session_x509_client_verify_configure.c
+            nxe_secure_tls_session_x509_client_verify_configure.c
+
+        Files are modified to support new API for Client X.509 authentication:
+            nx_secure_tls.h
+            nx_secure_tls_api.h
+
+        Files are modified to clear cryptographic secret data on errors:
+            nx_secure_tls_session_receive_records.c
+            nx_secure_tls_session_send.c
+
+        Files are modified to assure that random number values are always cast
+          to 32-bit type or smaller:
+            nx_secure_tls_generate_premaster_secret.c
+
+        Files are modified to assure that CBC padding values are properly checked:
+            nx_secure_tls_record_payload_decrypt.c
+
+        Files are modified to assure that MAC hash checking happens even if
+          decryption padding checking fails:
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_process_record.c
+
+        Files are modified to free all allocated remote certificates in a
+          TLS server session as soon as certificate chain validation is
+          complete. TLS clients need the remote certificates until after
+          the key echange is complete so they are cleared later:
+            nx_secure_tls_process_remote_certificate.c
+            nx_secure_tls_send_client_key_exchange.c
+
+        Files are modified to fix the usage of crypto metadata for hash method:
+            nx_secure_tls_local_certificate_add.c
+            nx_secure_tls_process_remote_certificate.c
+            nx_secure_tls_remote_certificate_verify.c
+            nx_secure_tls_session_create.c
+            nx_secure_tls_trusted_certificate_add.c
+            nx_secure_x509.h
+            nx_secure_x509_certificate_verify.c
+            nx_secure_x509_crl_verify.c
+
+        Files are modified to support AEAD cipher:
+            nx_secure_tls.h
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_record_payload_encrypt.c
+
+        Files are modified to reset TLS session state if the TLS connection fails:
+            nx_secure_tls_session_end.c
+            nx_secure_tls_session_start.c
+
+        Files are modified to return errors if cryptographic routines are
+          improperly initialized:
+            nx_secure_tls.h
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_process_finished.c
+
+        Files are modified to support elliptic curve cryptography:
+            nx_secure_tls.h
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_process_server_key_exchange.c
+            nx_secure_tls_process_serverhello_extensions.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_send_clienthello_extensions.c
+            nx_secure_tls_send_server_key_exchange.c
+            nx_secure_tls_send_serverhello_extensions.c
+            nx_secure_dtls_process_clienthello.c
+            nx_secure_dtls_send_clienthello.c
+            nx_secure_dtls_send_serverhello.c
+
+        Files are added or modified to optimize the logic:
+            nx_secure_tls_client_handshake.c
+            nx_secure_tls_payload_encrypt.c
+            nx_secure_tls_process_clienthello_extensions.c
+            nx_secure_tls_process_record.c
+            nx_secure_tls_send_certificate.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_send_clienthello.c
+            nx_secure_tls_send_clienthello_extensions.c
+            nx_secure_tls_send_serverhello.c
+            nx_secure_tls_send_serverhello_extensions.c
+            nx_secure_tls_server_handshake.c
+            nx_secure_tls_session_create.c
+            nx_secure_x509.c
+            nx_secure_x509_certificate_chain_verify.c
+
+        Files are modified to add wait_option to _nx_secure_tls_send_certificate:
+            nx_secure_dtls_client_handshake.c
+            nx_secure_dtls_server_handshake.c
+            nx_secure_tls.h
+            nx_secure_tls_client_handshake.c
+            nx_secure_tls_send_certificate.c
+            nx_secure_tls_server_handshake.c
+
+        Files are modified to fix renegotiation issue with certain browsers due to both
+          SCSV and the Secure Renegotiation extension being required (should be either/or):
+            nx_secure_tls.h
+            nx_secure_tls_map_error_to_alert.c
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_process_clienthello_extensions.c
+            nx_secure_tls_process_serverhello_extensions.c
+            nx_secure_tls_session_renegotiate.c
+            nx_secure_tls_session_reset.c
+
+        Files are modified about server state processing:
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_process_finished.c
+            nx_secure_tls_server_handshake.c
+            nx_secure_dtls_server_handshake.c
+
+        Files are modified to add flexibility of using macros instead of direct C library function calls:
+            nx_secure_dtls_client_handshake.c
+            nx_secure_dtls_hash_record.c
+            nx_secure_dtls_packet_allocate.c
+            nx_secure_dtls_process_clienthello.c
+            nx_secure_dtls_process_clienthello.c
+            nx_secure_dtls_process_header.c
+            nx_secure_dtls_process_helloverifyrequest.c
+            nx_secure_dtls_process_record.c
+            nx_secure_dtls_send_clienthello.c
+            nx_secure_dtls_send_helloverifyrequest.c
+            nx_secure_dtls_send_record.c
+            nx_secure_dtls_send_serverhello.c
+            nx_secure_dtls_server_handshake.c
+            nx_secure_dtls_session_cache.c
+            nx_secure_dtls_session_create.c
+            nx_secure_dtls_session_reset.c
+            nx_secure_dtls_session_send.c
+            nx_secure_dtls_verify_mac.c
+            nx_secure_tls.h
+            nx_secure_tls_client_handshake.c
+            nx_secure_tls_client_psk_set.c
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_generate_premaster_secret.c
+            nx_secure_tls_key_material_init.c
+            nx_secure_tls_local_certificate_remove.c
+            nx_secure_tls_packet_allocate.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_changecipherspec.c
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_process_finished.c
+            nx_secure_tls_process_remote_certificate.c
+            nx_secure_tls_process_serverhello.c
+            nx_secure_tls_process_serverhello_extensions.c
+            nx_secure_tls_psk_add.c
+            nx_secure_tls_psk_find.c
+            nx_secure_tls_record_payload_encrypt.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_clienthello.c
+            nx_secure_tls_send_finished.c
+            nx_secure_tls_send_serverhello.c
+            nx_secure_tls_session_create.c
+            nx_secure_tls_session_keys_set.c
+            nx_secure_tls_session_reset.c
+            nx_secure_tls_session_sni_extension_parse.c
+            nx_secure_tls_verify_mac.c
+            nx_secure_x509_certificate_initialize.c
+            nx_secure_x509_certificate_revocation_list_parse.c
+            nx_secure_x509_certificate_verify.c
+            nx_secure_x509_crl_revocation_check.c
+            nx_secure_x509_distinguished_name_compare.c
+            nx_secure_x509_dns_name_initialize.c
+            nx_secure_x509_oid_parse.c
+
+        Files are modified to add extension hook:
+            nx_secure_tls.h
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_generate_premaster_secret.c
+            nx_secure_tls_process_certificate_request.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_process_clienthello_extensions.c
+            nx_secure_tls_process_serverhello_extensions.c
+            nx_secure_tls_process_server_key_exchange.c
+            nx_secure_tls_send_certificate_request.c
+            nx_secure_x509.h
+            nx_secure_x509_crl_verify.c
+
+        Files are modified to properly initialize the crypto control block and pass crypto handled
+        into crypto internal functions:
+            nx_secure_tls.h
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_handshake_hash_init.c
+            nx_secure_tls_handshake_hash_update.c
+            nx_secure_tls_hash_record.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_process_serverhello_extensions.c
+            nx_secure_tls_process_server_key_exchange.c
+            nx_secure_tls_record_hash_initialize.c
+            nx_secure_tls_record_hash_update.c
+            nx_secure_x509_certificate_verify.c
+            nx_secure_x509_crl_verify.c
+
+        Files are modified to clear encryption key and other secret data:
+            nx_secure_dtls_send_record.c
+            nx_secure_dtls_session_end.c
+            nx_secure_dtls_session_receive.c
+            nx_secure_dtls_session_start.c
+            nx_secure_tls_client_handshake.c
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_handshake_process.c
+            nx_secure_tls_hash_record.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_record.c
+            nx_secure_tls_record_hash_calculate.c
+            nx_secure_tls_record_payload_encrypt.c
+            nx_secure_tls_send_record.c
+            nx_secure_tls_session_receive.c
+            nx_secure_tls_session_receive_records.c
+            nx_secure_tls_session_renegotiate.c
+            nx_secure_x509_crl_verify.c
+
+        Files are added for crypto method self test:
+            nx_secure_crypto_method_self_test_3des.c
+            nx_secure_crypto_method_self_test_aes.c
+            nx_secure_crypto_method_self_test_des.c
+            nx_secure_crypto_method_self_test_hmac_md5.c
+            nx_secure_crypto_method_self_test_hmac_sha.c
+            nx_secure_crypto_method_self_test_md5.c
+            nx_secure_crypto_method_self_test_prf.c
+            nx_secure_crypto_method_self_test_rsa.c
+            nx_secure_crypto_method_self_test_sha.c
+            nx_secure_crypto_rng_self_test.c
+            nx_secure_crypto_table_self_test.c
+            nx_secure_crypto_table_self_test.h
+
+        Other modified files:
+            nx_secure_dtls_process_clienthello.c            Adjusted the function name.
+            nx_secure_dtls_send_clienthello.c               Fixed endian issue.
+            nx_secure_module_hash_compute.c                 Compute the hash value of module.
+            nx_secure_tls_ecc_send_client_key_exchange.c    Fixed swapped PSK identity and hint parameters.
+            nx_secure_tls_process_record.c                  Removed unused function parameter (internal API).
+            nx_secure_tls_session_receive_records.c         Removed unused function parameter (internal API).       
+            nx_secure_tls.h                                 Supported ECC ciphersuite.
+                                                            Disabled AEAD by default.
+            nx_secure_tls_api.h                             Modified the format slightly.
+            nx_secure_tls_check_protocol_version.c          Fix compiler errors for position independence.
+            nx_secure_tls_ecc_process_certificate_request.c Fix the issue with no client certificate added.
+            nx_secure_tls_finished_hash_generate.c          Fixed the function pointer checking.
+            nx_secure_tls_generate_keys.c                   Rearranged code sequence for static analysis.
+            nx_secure_tls_generate_premaster_secret.c       Rearranged code sequence for static analysis.
+            nx_secure_tls_metadata_size_calculate.c         Fixed the usage of crypto metadata for hash method.
+            nx_secure_tls_newest_supported_version.c        Moved version override support to a separate API.
+            nx_secure_tls_process_certificate_verify.c      Fixed compiler warnings.
+            nx_secure_tls_process_client_key_exchange.c     Used random premaster for incorrect message.
+                                                              Fixed endian issue.
+            nx_secure_tls_process_clienthello.c             Corrected the index of compress method.
+            nx_secure_tls_process_clienthello_extensions.c  Added buffer size checking.
+            nx_secure_tls_process_record.c                  Modified the format slightly.
+            nx_secure_tls_process_server_key_exchange.c     Fixed endian issue.
+            nx_secure_tls_process_serverhello_extensions.c  Fixed compiler warnings.
+            nx_secure_tls_protocol_version_get.c            Moved version override support to a separate API. 
+
+            nx_secure_tls_record_payload_decrypt.c          Modified the format slightly.
+                                                              Fixed compiler issues.
+            nx_secure_tls_record_payload_encrypt.c          Added CBC mode checking for chained packet.
+                                                              Fixed packet buffer overflow while padding for AES-CBC.
+            nx_secure_tls_remote_certificate_buffer_allocate.c
+                                                            Rearranged code sequence for static analysis.
+            nx_secure_tls_send_clienthello_extensions.c     Send ClientHello extensions.
+            nx_secure_tls_send_record.c                     Skipped the hash when it was not required.
+            nx_secure_tls_send_server_key_exchange.c        Fixed endian issue.
+            nx_secure_tls_send_serverhello_extensions.c     Send ServerHello extensions.
+            nx_secure_tls_send_serverhello.c                Fixed compiler warnings.
+            nx_secure_tls_session_create.c                  Fixed the usage of crypto metadata for hash method.
+            nx_secure_tls_session_iv_size_get.c             Fixed IV size for TLS 1.0.
+            nx_secure_tls_session_keys_set.c                Rearranged code sequence for static analysis.
+            nx_secure_tls_session_reset.c                   Optimized the logic.
+            nx_secure_tls_session_time_function_set.c       Set a function pointer to get the current time.
+            nx_secure_tls_verify_mac.c                      Supported zero-length TLS application data records.
+            nx_secure_x509.c                                Fixed issues with parsing offsets and
+                                                              version check in parsing unique IDs.
+            nx_secure_x509.h                                Fixed compiler warnings.
+            nx_secure_x509_certificate_revocation_list_parse.c
+                                                            Improved CRL parsing.
+            nx_secure_x509_certificate_initialize.c         Released mutex when return.
+            nx_secure_x509_oid_parse.c                      Fix compiler errors for position independence.
+            nx_secure_x509_pkcs1_rsa_private_key_parse.c    Removed obsolete comment.
+            nxe_secure_tls_remote_certificate_buffer_allocate.c
+                                                            Rearranged code sequence for static analysis.
+            nxe_secure_tls_session_create.c                 Checked duplicate creation.
+            nxe_secure_tls_session_delete.c                 Verified the session before it is deleted.
+
+       Files renamed:
+
+               File Name in Release 5.11                             File Name in Release 5.12
+            nx_secure_tls_session_timestamp_function_set.c      nx_secure_tls_session_time_function_set.c
+            nxe_secure_tls_session_timestamp_function_set.c     nxe_secure_tls_session_time_function_set.c
+
+12/15/2017  NX Secure generic code version 5.11. This release includes the
+            following major features:
+
+        Session renegotiation and the Secure Renegotiation Indication extension
+            Full TLS session renegotiation is now supported, along with the
+            Secure Renegotiation Indication extension which prevents certain
+            Man-in-the-Middle attacks against renegotiation.
+
+        Certificate verification callback
+            Added support to allow application to perform additional checks on
+            a certificate provided by a remote host during the TLS handshake utilizing
+            a user-supplied callback.
+
+        Session callbacks for TLS Client and TLS Server
+            Added support to allow the application to process TLS extensions following
+            the reception of a Hello message from the remote host. This allows for
+            the application to respond to extensions requiring decisions such as
+            the Server Name Indication (SNI) extension which allows a client to specify
+            the name of the server it wishes to connect with.
+
+        Multiple Server Certificate support
+            Added new API to support adding multiple device identity certificates,
+            possibly with the same Subject (Common Name, etc.) using a new unique
+            numeric identifier (supplied by the application). This allows a TLS server
+            to host multiple identity certificates and choose an approriate certificate
+            to send to a connecting client. Used with the TLS Server session callback,
+            the application can search for the appropriate certificate during the TLS
+            handshake, and the numeric identifier allows for name conflicts between
+            multiple server certificates used for the same device.
+
+        Server Name Indication TLS extension
+            Added support for the TLS Server Name Indication (SNI) extension. This
+            extension allows a client to specify the server with which it is trying
+            to connect, allowing the server to select parameters and credentials
+            in the case where a single endpoint services multiple different server
+            identities.
+
+        X.509 Certificate Revocation List parsing
+            Added support for X.509 CRLs. A new API (used with the certificate verification
+            callback) is provided to check revocation status for certificates recieved
+            during the TLS handshake.
+
+        X.509 Key Usage and Extended Key Usage extensions support
+            Added helper functions to allow an application to check the Key Usage
+            and Extended Key Usage extensions in the certificate verification callback.
+            The extensions allow an application to determine if a certificate supplied
+            by a remote host is valid for a particular operation (e.g. identifying a
+            TLS server).
+
+        DNS verification
+            Added support for checking the URL top-level domain name for a remote host
+            against the certificate provided by that remote host. A new API (used
+            with the certificate verification callback) is provided to compare the TLD
+            name of the URL used to access a host with the Common Name and subjectAltName
+            DNSName fields in the X.509 certificate provided by the remote host.
+
+        Vendor-defined private key types
+            Added support for private key types beyond the standard DER-encoded RSA
+            keys. Vendor-defined private keys will be passed directly to the hardware
+            driver for the appropriate cryptographic operations, with the assumption
+            that all parsing, unwrapping, and processing of those keys will be handled
+            by the hardware or hardware driver.
+
+        Files are modified or added to add session callbacks:
+            nx_secure_tls.h
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_session_client_callback_set.c
+            nx_secure_tls_process_serverhello.c
+            nx_secure_tls_session_server_callback_set.c
+            nxe_secure_tls_session_client_callback_set.c
+            nxe_secure_tls_session_server_callback_set.c
+
+        Files are modified to match the certificate ID:
+            nx_secure_tls_local_certificate_remove.c
+            nx_secure_tls_trusted_certificate_remove.c
+            nx_secure_x509.h
+            nx_secure_x509_certificate_chain_verify.c
+            nx_secure_x509_certificate_list_add.c
+            nx_secure_x509_certificate_list_find.c
+            nx_secure_x509_certificate_list_remove.c
+            nx_secure_x509_local_device_certificate_get.c
+            nx_secure_x509_store_certificate_find.c
+            nx_secure_x509_store_certificate_add.c
+            nx_secure_x509_store_certificate_remove.c
+
+        Files are modified or added to support multiple extensions:
+            nx_secure_tls.h
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_process_clienthello_extensions.c
+            nx_secure_tls_process_serverhello.c
+            nx_secure_tls_process_serverhello_extensions.c
+            nx_secure_tls_session_sni_extension_parse.c
+            nx_secure_tls_session_sni_extension_set.c
+            nxe_secure_tls_session_sni_extension_parse.c
+            nxe_secure_tls_session_sni_extension_set.c
+
+        Files are modified or added to support DTLS:
+            nxe_secure_dtls_packet_allocate.c
+            nxe_secure_dtls_session_create.c
+            nxe_secure_dtls_session_delete.c
+            nxe_secure_dtls_session_end.c
+            nxe_secure_dtls_session_receive.c
+            nxe_secure_dtls_session_reset.c
+            nxe_secure_dtls_session_send.c
+            nxe_secure_dtls_session_start.c
+            nx_secure_dtls_allocate_handshake_packet.c
+            nx_secure_dtls_api.h
+            nx_secure_dtls_client_handshake.c
+            nx_secure_dtls.h
+            nx_secure_dtls_hash_record.c
+            nx_secure_dtls_packet_allocate.c
+            nx_secure_dtls_process_clienthello.c
+            nx_secure_dtls_process_handshake_header.c
+            nx_secure_dtls_process_header.c
+            nx_secure_dtls_process_helloverifyrequest.c
+            nx_secure_dtls_process_record.c
+            nx_secure_dtls_retransmit.c
+            nx_secure_dtls_retransmit_queue_flush.c
+            nx_secure_dtls_send_clienthello.c
+            nx_secure_dtls_send_handshake_record.c
+            nx_secure_dtls_send_helloverifyrequest.c
+            nx_secure_dtls_send_record.c
+            nx_secure_dtls_send_serverhello.c
+            nx_secure_dtls_server_handshake.c
+            nx_secure_dtls_session_cache.c
+            nx_secure_dtls_session_create.c
+            nx_secure_dtls_session_delete.c
+            nx_secure_dtls_session_end.c
+            nx_secure_dtls_session_receive.c
+            nx_secure_dtls_session_reset.c
+            nx_secure_dtls_session_send.c
+            nx_secure_dtls_session_start.c
+            nx_secure_dtls_verify_mac.c
+            nx_secure_tls_check_protocol_version.c
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_handshake_hash_update.c
+            nx_secure_tls_newest_supported_version.c
+            nx_secure_tls_process_certificate_request.c
+            nx_secure_tls_send_certificate_verify.c
+
+        Files are modified or added to optimize the logic:
+            nx_secure_tls_client_handshake.c
+            nx_secure_tls_ciphersuite_lookup.c
+            nx_secure_tls_finished_hash_generate.c
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_handshake_process.c
+            nx_secure_tls_key_material_init.c
+            nx_secure_tls_process_certificate_request.c
+            nx_secure_tls_process_certificate_verify.c
+            nx_secure_tls_process_changecipherspec.c
+            nx_secure_tls_process_header.c
+            nx_secure_tls_process_remote_certificate.c
+            nx_secure_tls_send_alert.c
+            nx_secure_tls_send_certificate.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_changecipherspec.c
+            nx_secure_tls_send_clienthello.c
+            nx_secure_tls_send_record.c
+            nx_secure_tls_send_server_key_exchange.c
+            nx_secure_tls_send_serverhello.c
+            nx_secure_tls_server_handshake.c
+            nx_secure_tls_session_create.c
+            nx_secure_tls_session_iv_size_get.c
+            nx_secure_tls_session_keys_set.c
+            nx_secure_tls_session_start.c
+            nx_secure_tls_verify_mac.c
+            nx_secure_x509_certificate_list_find.c
+            nx_secure_x509_remote_endpoint_certificate_get.c
+            nx_secure_x509_store_certificate_add.c
+            nxe_secure_tls_packet_allocate.c
+            nxe_secure_tls_session_create.c
+
+        Files are modified or added to support renegotiation:
+            nx_secure_tls.h
+            nx_secure_tls_client_handshake.c
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_process_finished.c
+            nx_secure_tls_send_clienthello.c
+            nx_secure_tls_send_finished.c
+            nx_secure_tls_send_hellorequest.c
+            nx_secure_tls_send_serverhello.c
+            nx_secure_tls_session_receive.c
+            nx_secure_tls_session_receive_records.c
+            nx_secure_tls_session_renegotiate.c
+            nx_secure_tls_session_renegotiation_callback_set.c
+            nx_secure_tls_session_reset.c
+            nxe_secure_tls_session_renegotiate.c
+            nxe_secure_tls_session_renegotiation_callback_set.c
+
+        Files are modified to support more ciphersuites:
+            nx_secure_tls.h
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_record_payload_encrypt.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_send_clienthello.c
+
+        Files are modified to support ECJPAKE for DTLS:
+            nx_secure_tls.h
+            nx_secure_tls_generate_keys.c
+            nx_secure_tls_generate_premaster_secret.c
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_process_server_key_exchange.c
+            nx_secure_tls_psk_add.c
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_tls_send_server_key_exchange.c
+            nxe_secure_tls_psk_add.c
+
+        Files are modified to fix compiler warnings:
+            nx_secure_tls_process_clienthello.c
+            nx_secure_tls_record_payload_decrypt.c
+            nx_secure_tls_remote_certificate_verify.c
+            nx_secure_tls_send_certificate.c
+            nx_secure_tls_session_end.c
+            nx_secure_x509.c
+            nx_secure_x509_certificate_chain_verify.c
+            nx_secure_x509_certificate_list_add.c
+            nx_secure_x509_certificate_list_find.c
+            nx_secure_x509_certificate_list_remove.c
+            nx_secure_x509_certificate_verify.c
+            nx_secure_x509_remote_endpoint_certificate_get.c
+
+        Files are modified to support TLS protocol version override:
+            nx_secure_tls_check_protocol_version.c
+            nx_secure_tls_newest_supported_version.c
+            nx_secure_tls_session_reset.c
+
+        Files are modified to support context specific ASN.1 tags:
+            nx_secure_x509_asn1_tlv_block_parse.c
+            nx_secure_x509_pkcs1_rsa_private_key_parse.c
+            nx_secure_x509_pkcs7_decode.c
+
+        Files are added to hash record:
+            nx_secure_tls_record_hash_calculate.c
+            nx_secure_tls_record_hash_initialize.c
+            nx_secure_tls_record_hash_update.c
+
+        Files are added to free remote certificate:
+            nx_secure_tls_remote_certificate_free.c
+            nx_secure_tls_remote_certificate_free_all.c
+            nxe_secure_tls_remote_certificate_free_all.c
+
+        Files are added to support vendor-defined private key type:
+            nx_secure_tls_process_client_key_exchange.c
+            nx_secure_tls_send_certificate_verify.c
+            nx_secure_tls_send_client_key_exchange.c
+            nx_secure_x509.c
+            nx_secure_x509_certificate_initialize.c
+            nx_secure_x509_certificate_verify.c
+            nx_secure_x509_pkcs1_rsa_private_key_parse.c
+            nxe_secure_x509_certificate_initialize.c
+
+        Files are added to support empty certificate messages:
+            nx_secure_tls_send_certificate.c
+            nx_secure_tls_send_certificate_verify.c
+
+        Files are added for server certificate API:
+            nx_secure_tls_server_certificate_add.c
+            nx_secure_tls_server_certificate_find.c
+            nx_secure_tls_server_certificate_remove.c
+            nxe_secure_tls_server_certificate_add.c
+            nxe_secure_tls_server_certificate_find.c
+            nxe_secure_tls_server_certificate_remove.c
+
+        Files are modified to add compare bit fields:
+            nx_secure_tls_send_certificate.c
+            nx_secure_x509.h
+            nx_secure_x509_certificate_chain_verify.c
+            nx_secure_x509_certificate_list_remove.c
+            nx_secure_x509_distinguished_name_compare.c
+            nx_secure_x509_remote_endpoint_certificate_get.c
+
+        Other modified files:
+            nx_secure_tls.h                                 Supported to configure symbols for PSK buffers.
+                                                            Sorted the functions by alphabet order.
+            nx_secure_tls_api.h                             Sorted the API by alphabet order.
+            nx_secure_tls_check_protocol_version.c          Supported TLS protocol version override.
+            nx_secure_tls_client_handshake.c                Handled the return values.
+                                                            Fixed packet leak issue.
+            nx_secure_tls_initialize.c                      Fixed the function name.
+            nx_secure_port.h                                Fixed a typo.
+            nx_secure_tls_generate_keys.c                   Added additional check for missing PRF.
+            nx_secure_tls_map_error_to_alert.c              Updated mapping for certificate
+                                                              verification failure.
+            nx_secure_tls_process_client_key_exchange.c     Updated to new crypto API.
+            nx_secure_tls_process_record.c                  Fixed record length check.
+            nx_secure_tls_psk_find.c                        Returned the first associated PSK when
+                                                              no hint is received.
+            nx_secure_tls_record_payload_encrypt.c          Supported data in packet chain.
+            nx_secure_tls_remote_certificate_verify.c       Added expiration data check.
+            nx_secure_tls_send_certificate.c                Released mutex before block operation.
+            nx_secure_tls_send_clienthello.c                Supported extensions.
+            nx_secure_tls_send_handshake_record.c           Released packet on error.
+            nx_secure_tls_send_record.c                     Let the caller release packet when TCP send failed.
+            nx_secure_tls_send_serverhello.c                Supported extensions.
+            nx_secure_tls_server_handshake.c                Added support for server-side client
+                                                              certificate verification.
+                                                            Released packet on send failed.
+            nx_secure_tls_session_end.c                     Improved TLS session shutdown.
+                                                            Released packet on send failed.
+            nx_secure_tls_session_reset.c                   Cleaned up existing certificate.
+            nx_secure_x509.c                                Added support for extension parsing.
+            nx_secure_x509.h                                Added support for extension parsing and fixed typos for API names.
+            nx_secure_x509_certificate_list_add.c           Fixed the logic to add certificate with duplicate ID.
+            nx_secure_x509_distinguished_name_compare.c     Supported empty name comparison.
+                                                            Improved the distinguished name comparison logic.
+            nx_secure_x509_find_certificate_methods.c       Updated API to take an ID for the
+                                                              algorithm desired.
+            nx_secure_x509_local_device_certificate_get.c   Used pre-defined symbols instead of
+                                                              hardcoded values.
+            nx_secure_x509_pkcs7_decode.c                   Fixed signature length check.
+
+        Other added files:
+            nx_secure_tls_active_certificate_set.c          Set the active local certificate.
+            nx_secure_tls_local_certificate_find.c          New API to find certificates by Common Name.
+            nx_secure_tls_send_certificate_request.c        Populated an NX_PACKET with a CertificateRequest message.
+            nx_secure_tls_session_certificate_callback_set.c
+                                                            Set up a function pointer that TLS will
+                                                              invoke when a certificate is received.
+            nx_secure_tls_session_client_verify_disable.c   Disabled client certificate verification.
+            nx_secure_tls_session_client_verify_enable.c    Enabled client certificate verification.
+            nx_secure_tls_session_protocol_version_override.c
+                                                            Overrided the TLS protocol version.
+            nx_secure_x509_certificate_revocation_list_parse.c
+                                                            Supported revocation list parse.
+            nx_secure_x509_common_name_dns_check.c          Checked a certificate's Common Name
+                                                              against a Top Level Domain name (TLD).
+            nx_secure_x509_crl_revocation_check.c           Supported revocation check.
+            nx_secure_x509_crl_verify.c                     Verified CRL.
+            nx_secure_x509_distinguished_name_parse.c       Parsed a DER-encoded X.509 Distinguished Name.
+            nx_secure_x509_dns_name_initialize.c            Initialized an X.509 DNS name.
+            nx_secure_x509_expiration_check.c               Checked a certificate's validity period.
+            nx_secure_x509_extended_key_usage_extension_parse.c
+                                                            Parse through an X.509 certificate for
+                                                              an Extended KeyUsage extension.
+            nx_secure_x509_extension_find.c                 Added support for X.509 extension parsing.
+            nx_secure_x509_key_usage_extension_parse.c      Parse through an X.509 certificate for
+                                                              a KeyUsage extension.
+            nx_secure_x509_local_certificate_find.c         Searched a given certificate store.
+            nx_secure_x509_oid_parse.c                      Parsed a DER-encoded Object Identifier string.
+            nx_secure_x509_subject_alt_names_find.c         Searched X.509 subjectAltName.
+            nx_secure_x509_wildcard_compare.c               Compared wildcard names.
+            nxe_secure_tls_active_certificate_set.c         Set the active local certificate.
+            nxe_secure_tls_local_certificate_find.c         New API to find local certificate by Common Name.
+            nxe_secure_tls_session_certificate_callback_set.c
+                                                            Set up a function pointer that TLS will
+                                                              invoke when a certificate is received.
+            nxe_secure_tls_session_client_verify_disable.c  Disabled client certificate verification.
+            nxe_secure_tls_session_client_verify_enable.c   Enabled client certificate verification.
+            nxe_secure_tls_session_protocol_version_override.c
+                                                            Overrided the TLS protocol version.
+            nxe_secure_x509_common_name_dns_check.c         Checked a certificate's Common Name
+                                                              against a Top Level Domain name (TLD).
+            nxe_secure_x509_crl_revocation_check.c          Supported revocation check.
+            nxe_secure_x509_dns_name_initialize.c           Initialized an X.509 DNS name.
+            nxe_secure_x509_extension_find.c                Added support for X.509 extension parsing.
+            nxe_secure_x509_extended_key_usage_extension_parse.c
+                                                            Parse through an X.509 certificate for
+                                                              an Extended KeyUsage extension.
+            nxe_secure_x509_key_usage_extension_parse.c     Parse through an X.509 certificate for
+                                                              a KeyUsage extension.
+
+        Files renamed:
+
+               File Name in Release 5.10                             File Name in Release 5.11
+            nx_secure_tls_process_server_certificate.c      nx_secure_tls_process_remote_certificate.c
+
+06/09/2017  Initial NX Secure generic code version 5.10.
+
+
+3. NetXDuo Secure Crypto
+
+08/15/2019  NX Secure generic code version 5.12. This release includes the
+            following major features:
+
+        Files are modified to provide consistent error checking of return
+        values from generic NX_CRYPTO cipher routine APIs:
+            nx_crypto_const.h
+            nx_crypto_drbg.c
+            nx_crypto_ecjpake.c
+            nx_crypto_ecjpake.h
+            nx_crypto_phash.c
+            nx_crypto_pkcs1_v1.5.c
+
+        Files are modified to improve error checking:
+            nx_crypto_ec.c
+            nx_crypto_ec.h
+            nx_crypto_ecdh.c
+            nx_crypto_ecdsa.c
+            nx_crypto_ecjpake.c
+
+        Files are modified to fix the compiler warnings for cast-function-type:
+            nx_crypto_3des.c
+            nx_crypto_des.c
+            nx_crypto_des.h
+            nx_crypto_md5.c
+            nx_crypto_md5.h
+            nx_crypto_sha1.c
+            nx_crypto_sha1.h
+
+        Files are modified to address issues raised by static anaylsis tools:
+            nx_crypto_aes.c
+            nx_crypto_cbc.c
+            nx_crypto_drbg.c
+            nx_crypto_ec.c
+            nx_crypto_ecjpake.c
+            nx_crypto_huge_number.c
+            nx_crypto_phash.c
+            nx_crypto_sha5.c
+
+        Files are modified to add an "extern 'C'" wrapper for C++ compilers:
+            nx_crypto.h
+            nx_crypto_3des.h
+            nx_crypto_const.h
+            nx_crypto_des.h
+            nx_crypto_ecdsa.h
+            nx_crypto_hkdf.h
+            nx_crypto_hmac_md5.h
+            nx_crypto_hmac_sha1.h
+            nx_crypto_hmac_sha2.h
+            nx_crypto_hmac_sha5.h
+            nx_crypto_md5.h
+            nx_crypto_phash.h
+            nx_crypto_pkcs1_v1.5.h
+            nx_crypto_sha1.h
+            nx_crypto_sha2.h
+            nx_crypto_sha5.h
+            nx_crypto_tls_prf_1.h
+            nx_crypto_tls_prf_sha256.h
+            nx_crypto_tls_prf_sha384.h
+            nx_crypto_tls_prf_sha512.h
+
+        Files are modified to avoid unaligned memory access:
+            nx_crypto_aes.c
+            nx_crypto_ccm.c
+            nx_crypto_ctr.c
+            nx_crypto_drbg.c
+            nx_crypto_xcbc_mac.c
+
+        Files are modified or added to be FIPS 140-2 compliant:
+            nx_crypto.h
+            nx_crypto_3des.c
+            nx_crypto_3des.h
+            nx_crypto_aes.c
+            nx_crypto_cbc.c
+            nx_crypto_cbc.h
+            nx_crypto_ccm.c
+            nx_crypto_ccm.h
+            nx_crypto_const.h
+            nx_crypto_ctr.c
+            nx_crypto_ctr.h
+            nx_crypto_des.c
+            nx_crypto_des.h
+            nx_crypto_dh.c
+            nx_crypto_dh.h
+            nx_crypto_ec.c
+            nx_crypto_ec.h
+            nx_crypto_ecjpake.c
+            nx_crypto_ecjpake.h
+            nx_crypto_generic_ciphersuites.c
+            nx_crypto_hmac.c
+            nx_crypto_hmac.h
+            nx_crypto_hmac_md5.c
+            nx_crypto_hmac_md5.h
+            nx_crypto_hmac_sha1.c
+            nx_crypto_hmac_sha1.h
+            nx_crypto_hmac_sha2.c
+            nx_crypto_hmac_sha2.h
+            nx_crypto_hmac_sha5.c
+            nx_crypto_hmac_sha5.h
+            nx_crypto_huge_number.c
+            nx_crypto_huge_number.h
+            nx_crypto_huge_number_extended.c
+            nx_crypto_initialize.c
+            nx_crypto_md5.c
+            nx_crypto_md5.h
+            nx_crypto_method_self_test.c
+            nx_crypto_method_self_test.h
+            nx_crypto_method_self_test_3des.c
+            nx_crypto_method_self_test_aes.c
+            nx_crypto_method_self_test_des.c
+            nx_crypto_method_self_test_drbg.c
+            nx_crypto_method_self_test_ecdh.c
+            nx_crypto_method_self_test_ecdsa.c
+            nx_crypto_method_self_test_hmac_md5.c
+            nx_crypto_method_self_test_hmac_sha.c
+            nx_crypto_method_self_test_md5.c
+            nx_crypto_method_self_test_pkcs1.c
+            nx_crypto_method_self_test_prf.c
+            nx_crypto_method_self_test_rsa.c
+            nx_crypto_method_self_test_sha.c
+            nx_crypto_module_start.c
+            nx_crypto_null.h
+            nx_crypto_null_cipher.c
+            nx_crypto_phash.c
+            nx_crypto_phash.h
+            nx_crypto_pkcs1_v1.5.c
+            nx_crypto_pkcs1_v1.5.h
+            nx_crypto_rsa.c
+            nx_crypto_sha1.c
+            nx_crypto_sha1.h
+            nx_crypto_sha2.c
+            nx_crypto_sha2.h
+            nx_crypto_sha5.c
+            nx_crypto_sha5.h
+            nx_crypto_tls_prf_1.c
+            nx_crypto_tls_prf_1.h
+            nx_crypto_tls_prf_sha256.c
+            nx_crypto_tls_prf_sha256.h
+            nx_crypto_xcbc_mac.c
+            nx_crypto_xcbc_mac.h
+
+        Files are modified to add operation method for elliptic curve cryptography:
+            nx_crypto.h
+            nx_crypto_const.h
+            nx_crypto_ec.c
+            nx_crypto_ec.h
+            nx_crypto_ecjpake.c
+            nx_crypto_ecjpake.h
+            nx_crypto_generic_ciphersuites.c
+
+        Other modified files:
+            nx_crypto.h                                     Avoided unexpected optimization on memset.
+            nx_crypto_aes.h                                 Split operation functions for different modes.
+            nx_crypto_aes.c                                 Split operation functions for different modes.
+            nx_crypto_const.h                               Set algorithm IDs to unique values.
+            nx_crypto_dh.c                                  Fixed key length check.
+            nx_crypto_ecjpake.c                             Generated key pair using extra bits.
+            nx_crypto_generic_ciphersuites.c                Split crypto methods to nx_crypto_methods.c, 
+                                                              remove CCM ciphersuites when AEAD was disabled.
+            nx_crypto_huge_number.c                         Optimized the logic.
+            nx_crypto_method_self_test_drbg.c               Added return value checking of nx_crypto_init.
+            nx_crypto_rsa.h                                 Modified to support RSA 4096 bits by default.
+            nx_crypto_generic_ciphersuites.c                Removed CCM ciphersuites when AEAD was disabled.
+
+        Other added files:
+            nx_crypto_drbg.c                                Supported DRBG.
+            nx_crypto_drbg.h                                Supported DRBG.
+            nx_crypto_ecdh.c                                Supported ECDH.
+            nx_crypto_ecdh.h                                Supported ECDH.
+            nx_crypto_ecdsa.c                               Supported ECDSA.
+            nx_crypto_ecdsa.h                               Supported ECDSA.
+            nx_crypto_methods.c                             Split from nx_crypto_generic_ciphersuites.c
+            nx_crypto_tls_prf_sha384.c                      Supported PRF SHA384
+            nx_crypto_tls_prf_sha384.h                      Supported PRF SHA384
+            nx_crypto_tls_prf_sha512.c                      Supported PRF SHA512
+            nx_crypto_tls_prf_sha512.h                      Supported PRF SHA512
+
+12/15/2017  Initial Crypto generic code version 5.11.
+
+
+4. NetXDuo Addons
+
+Release 5.12  08-15-2019
+
+            demo_netx_auto_ip.c                             Improved string length verification.
+            nx_auto_ip.c                                    Modified comments.
+            nx_auto_ip.h                                    Modified comments.
+            
+            bsd_demo_raw.c                                  Improved string length verification.
+            bsd_demo_tcp.c                                  Improved string length verification.
+            bsd_demo_udp.c                                  Improved string length verification.
+            nxd_bsd.h                                       Supported BSD raw socket.
+                                                            Added C++ extern wrapper.
+            nxd_bsd.c                                       Supported BSD raw socket.
+                                                            Added mutex protection.
+                                                            Fixed BSD time calculation.
+                                                            Improved packet length verification.
+                                                            Modified API functions:
+                                                              connect - Initialized the local interface after bind.
+                                                              getaddrinfo - Fixed NULL pointer access.
+                                                              inet_pton - Corrected dst buffer check.
+                                                                           
+            nxd_dhcp_client.c                               Improved string length verification.
+                                                            Improved packet length verification.
+                                                            Corrected the logic for checking DHCP message.
+                                                            Fixed the outgoing interface.
+                                                              Function is modified:
+                                                              _nx_dhcp_client_send_with_zero_source_address()
+                                                            Added check for invalid address.
+            nxd_dhcp_server.c                               Improved string length verification.
+                                                            Corrected the interface for sending response in _nx_dhcp_respond_to_client_message().
+            demo_netxduo_dhcpv6.c                           Improved string length verification.
+            nxd_dhcpv6_client.c                             Improved string length verification.
+                                                            Validated the available payload in _nx_dhcpv6_send_request().
+                                                            Improved packet length verification.
+            nxd_dhcpv6_client.h                             Improved string length verification.
+            nxd_dhcpv6_server.c                             Added new APIs to improve buffer/string length verification.
+                                                            Validated the DUID private length in _nx_dhcpv6_add_client_record().
+                                                            Improved packet length verification.
+            nxd_dhcpv6_server.h                             Added new APIs to improve buffer/string length verification.
+            
+            nxd_dns.h                                       Improved internal logic.
+            nxd_dns.c                                       Improved packet payload verification in _nx_dns_packet_pool_set().
+                                                            Improved string length verification.
+                                                              Functions are modified:
+                                                              _nx_dns_cache_delete_string()
+                                                              _nx_dns_cache_find_answer()
+                                                              _nx_dns_host_by_address_get_internal()
+                                                              _nx_dns_process_a_type()
+                                                              _nx_dns_process_aaaa_type()
+                                                              _nx_dns_process_cname_type()
+                                                              _nx_dns_process_mx_type()
+                                                              _nx_dns_process_ns_type()
+                                                              _nx_dns_process_soa_type()
+                                                              _nx_dns_process_srv_type()
+                                                              _nx_dns_process_txt_type()
+                                                              _nx_dns_question_add()
+                                                              _nx_dns_send_query_by_address()
+                                                            Improved internal logic.
+                                                              Functions are modified:
+                                                              _nx_dns_send_query_by_address()
+                                                              _nx_dns_send_query_get_rdata_by_name()
+                                                              _nx_dns_name_string_unencode()
+                                                              _nxde_dns_host_by_name_get()
+                                                            Fixed compiler warnings in _nx_dns_process_txt_type().
+                                                            
+         demo_netxduo_ftp.c                                 Improved string length verification.
+         demo_netxduo_ftp_client_pasv.c                     Improved string length verification.
+         nxd_ftp_client.c                                   Improved internal logic.
+                                                            Improved string length verification.
+                                                            Improved buffer length verification.
+         nxd_ftp_client.h                                   Removed FileX dependency.
+                                                            Improved string length verification.
+         nxd_ftp_server.c                                   Fixed a bug when there were more than one connection.
+                                                            Fixed socket state check on receiving RST packet.
+                                                            Improved string length verification.
+                                                            Improved buffer length verification.     
+                                                            
+        nxd_http_client.h                                   Included necessary headers.
+                                                            Improved string length verification.
+        nxd_http_server.h                                   Included necessary headers.
+                                                            Improved string length verification.
+        nxd_http_client.c                                   Added check of null pointer for username and password.
+                                                            Improved packet length verification.
+                                                            Improved string length verification.
+        nxd_http_server.c                                   Fixed buffer size for DELETE method in _nx_http_server_digest_authenticate().
+                                                            Fixed compiler warnings in _nx_http_server_hex_ascii_convert().
+                                                            Improved logic to avoid timing attack in _nx_http_server_digest_authenticate()
+                                                             and _nx_http_server_basic_authenticate().
+                                                            Improved string length verification.
+                                                            Created function nx_http_server_type_retrieve() as 
+                                                             an alternative to nx_http_server_type_get().
+                                                            Added digest authentication callback support.
+                                                            Improved packet length verification.  
+                                                            
+        demo_netx_duo_mdns.c                                Added simultaneous interface support.
+        nxd_mdns.c                                          Added local resource records as known answer.
+                                                              Functions are modified:
+                                                              _nx_mdns_data_send()
+                                                              _nx_mdns_known_answer_find()
+                                                            Initialized is_present to fix the bug for processing service change notify.
+                                                              Functions is modified:
+                                                              _nx_mdns_cache_add_resource_record()
+                                                            Corrected the cache pointer.
+                                                              Functions is modified:
+                                                              _nx_mdns_service_lookup()
+                                                            Added simultaneous interface support.
+                                                              Functions are modified or added or deleted:
+                                                              _nx_mdns_additional_a_aaaa_find()
+                                                              _nx_mdns_additional_resource_record_find()
+                                                              _nx_mdns_address_change_process()
+                                                              _nx_mdns_announcing_send()
+                                                              _nx_mdns_cache_add_resource_record()
+                                                              _nx_mdns_cache_find_resource_record()
+                                                              _nx_mdns_continuous_query()
+                                                              _nx_mdns_create()
+                                                              _nx_mdns_data_send()
+                                                              _nx_mdns_disable()
+                                                              _nx_mdns_enable()
+                                                              _nx_mdns_host_address_get()
+                                                              _nx_mdns_host_name_register()
+                                                              _nx_mdns_known_answer_find()
+                                                              _nx_mdns_one_shot_query()
+                                                              _nx_mdns_packet_process()
+                                                              _nx_mdns_packet_rr_process()
+                                                              _nx_mdns_packet_rr_set()
+                                                              _nx_mdns_packet_send()
+                                                              _nx_mdns_probing_send()
+                                                              _nx_mdns_query_check()
+                                                              _nx_mdns_query_send()
+                                                              _nx_mdns_response_send()
+                                                              _nx_mdns_rr_a_aaaa_add()
+                                                              _nx_mdns_rr_nsec_add()
+                                                              _nx_mdns_rr_parameter_set()
+                                                              _nx_mdns_rr_ptr_add()
+                                                              _nx_mdns_rr_txt_add()
+                                                              _nx_mdns_service_add()
+                                                              _nx_mdns_service_addition_info_get()
+                                                              _nx_mdns_service_change_notify_process()
+                                                              _nx_mdns_service_continuous_query()
+                                                              _nx_mdns_service_delete()
+                                                              _nx_mdns_service_interface_delete()
+                                                              _nx_mdns_service_lookup()
+                                                              _nx_mdns_service_one_shot_query()
+                                                              _nx_mdns_service_query_stop()
+                                                              _nx_mdns_timer_event_process()
+                                                              _nx_mdns_thread_entry()
+                                                              _nxe_mdns_service_add()
+                                                            Fixed compiler warnings in _nx_mdns_ipv6_address_change_notify().
+                                                            Fixed ipv6 address string.
+                                                              Functions are modified:
+                                                              _nx_mdns_cache_delete_rr_string()
+                                                              _nx_mdns_cache_find_resource_record()
+                                                              _nx_mdns_packet_rr_data_set()
+                                                              _nx_mdns_rr_a_aaaa_add()
+                                                            Improve string length verification.
+                                                              Functions are modified:
+                                                              _nx_mdns_create()
+                                                              _nx_mdns_disable()
+                                                              _nxe_mdns_create()
+                                                              _nxe_mdns_domain_name_set()
+                                                              _nxe_mdns_service_add()
+                                                              _nx_mdns_service_add()
+                                                              _nxe_mdns_service_delete()
+                                                              _nx_mdns_service_interface_delete()
+                                                              _nxe_mdns_service_one_shot_query()
+                                                              _nx_mdns_service_one_shot_query()
+                                                              _nx_mdns_one_shot_query()
+                                                              _nxe_mdns_service_continuous_query()
+                                                              _nx_mdns_continuous_query()
+                                                              _nxe_mdns_service_query_stop()
+                                                              _nx_mdns_service_query_stop()
+                                                              _nxe_mdns_service_lookup()
+                                                              _nx_mdns_service_lookup()
+                                                              _nxe_mdns_host_address_get()
+                                                              _nx_mdns_host_address_get()
+                                                              _nx_mdns_rr_ptr_add()
+                                                              _nx_mdns_rr_srv_add()
+                                                              _nx_mdns_rr_txt_add()
+                                                              _nx_mdns_rr_nsec_add()
+                                                              _nx_mdns_rr_parameter_set()
+                                                              _nx_mdns_service_name_resolve()
+                                                              _nx_mdns_service_name_assemble()
+                                                              _nx_mdns_host_name_register()
+                                                              _nx_mdns_timer_event_process()
+                                                              _nx_mdns_probing_send()
+                                                              _nx_mdns_packet_rr_add()
+                                                              _nx_mdns_packet_rr_set()
+                                                              _nx_mdns_packet_rr_process()
+                                                              _nx_mdns_packet_rr_data_set()
+                                                              _nx_mdns_conflict_process()
+                                                              _nx_mdns_service_change_notify_process()
+                                                              _nx_mdns_service_addition_info_get()
+                                                              _nx_mdns_cache_add_resource_record()
+                                                              _nx_mdns_cache_delete_string()
+                                                              _nx_mdns_known_answer_find()
+                                                              _nx_mdns_query_check()
+                                                              _nx_mdns_service_mask_match()
+                                                            Improve packet length verification.
+                                                              Functions are modified:
+                                                              _nx_mdns_packet_create()
+                                                              _nx_mdns_packet_process()
+            nxd_mdns.h                                      Added simultaneous interface support.
+                                                            Fixed ipv6 address string.
+                                                            Improve string length verification.     
+
+            nxd_mqtt_client.c                               Corrected the mutex processing for receiving MQTT CONNACK.
+                                                            Added packet receive notify.
+                                                            Checked return status of TLS setup in _nxd_mqtt_client_secure_connect().
+                                                            Deleted TLS session when disconnecting MQTT in _nxd_mqtt_process_disconnect().
+                                                            Deleted TLS session when MQTT connect failed.
+                                                            Improved internal logic.
+                                                            Corrected timeout for TLS session.
+                                                            Improved packet length verification.
+            nxd_mqtt_client.h                               Added packet receive notify.
+                                                            Changed the return type of tls_setup to UINT. 
+
+            demo_netx_nat.c                                 Improved string length verification.   
+
+            nxd_pop3_client.c                               Improved packet length verification.
+                                                            Improved internal logic.
+                                                            Improved string length verification.
+            nxd_pop3_client.h                               Improved string length verification. 
+
+            demo_netx_ppp.c                                 Improved string length verification.
+                                                            Improved the logic.
+         
+
+            nx_ppp.c                                        Improved buffer length verification.
+                                                            Functions are modified or added:
+                                                              _nx_ppp_ipcp_configure_check()
+                                                              _nx_ppp_lcp_configuration_retrieve()
+                                                            Improved packet length verification.
+                                                              Functions are modified or added:
+                                                              _nx_ppp_chap_challenge_respond()
+                                                              _nx_ppp_chap_challenge_send()
+                                                              _nx_ppp_create()
+                                                              _nx_ppp_ipcp_configure_check()
+                                                              _nx_ppp_lcp_code_reject()
+                                                              _nx_ppp_lcp_configuration_retrieve()
+                                                              _nx_ppp_lcp_configure_reply_send()
+                                                              _nx_ppp_pap_authentication_request()
+                                                              _nx_ppp_ping_request()
+                                                              _nx_ppp_receive_packet_process()
+                                                            Improved internal logic.
+                                                              Function is modified:
+                                                              _nx_ppp_receive_packet_get()
+                                                            Fixed the bug for chained packet.
+                                                              Function is modified:
+                                                              _nx_ppp_netx_packet_transfer()
+                                                            Improved string length verification.
+                                                              Functions are modified:
+                                                              _nx_ppp_pap_authentication_request()
+                                                              _nx_ppp_pap_login_valid()
+                                                              _nx_ppp_chap_challenge_send()
+                                                              _nx_ppp_chap_challenge_respond()
+                                                              _nx_ppp_chap_challenge_validate()
+                                                              _nx_ppp_pap_login_valid()
+            nx_ppp.h                                           Improved string length verification.
+                                                            Improved packet length verification.   
+
+            nx_pppoe_client.c                               Improved string length verification.
+                                                            Corrected the function name.
+                                                            Improved internal logic.
+                                                            Improved buffer length verification.
+                                                            Fixed system state check.
+            nx_pppoe_client.h                               Improved internal logic.
+                                                            Improved string length verification.
+            nx_pppoe_server.c                               Improved string length verification.
+                                                            Improved buffer length verification.
+
+            nxd_smtp_client.h                               Improved string length verification.
+            nxd_smtp_client.c                               Improved string length verification.
+                                                            Improved buffer length verification.   
+
+            nxd_snmp.h                                      Improved string length verification.
+
+            nxd_snmp.c                                      Improved buffer length verification.
+                                                            Improved string length verification.
+                                                            Fixed a compiler warning.
+                                                            Modified nx_snmp_version_3_process to check for string size before writing PDU Engine name.     
+
+            demo_netxduo_sntp_client.c                      Fixed compiler warnings.
+            nxd_sntp_client.c                               Improved packet length verification.
+                                                            Corrected the length of memset.
+                                                            Adjusted local time before updating SNTP server time.
+                                                            Kept microseconds precision while adding milliseconds.
+            nxd_sntp_client.h                               Adjusted local time before updating SNTP server time.    
+
+            nxd_telnet_server.c                             Improved packet length verification.
+                                                            Fixed socket state check on receiving RST packet.
+                                                            Fixed a bug when there were more than one connection.      
+
+            demo_netxduo_tftp.c                             Improved string length verification.
+            nxd_tftp_client.c                               Improved string length verification.
+                                                            Improved packet length verification.
+            nxd_tftp_server.c                               Improved string length verificaiton.
+                                                            Improved packet length verification.   
+
+            demo_netxduo_https.c                            Improved string length verification.
+            nx_web_http_common.h                            Improved string length verification.
+            nx_web_http_client.c                            Deleted TLS session in _nx_web_http_client_error_exit().
+                                                            Cleared request packet.
+                                                            Functions are modified:
+                                                              _nx_web_http_client_delete()
+                                                              _nx_web_http_client_request_initialize()
+                                                              _nx_web_http_client_cleanup()
+                                                            Added check of client state in _nx_web_http_client_response_body_get().
+                                                            Checked if request packet was allocated.
+                                                            Functions are modified:
+                                                              _nx_web_http_client_request_header_add()
+                                                              _nxe_web_http_client_request_send()
+                                                              _nx_web_http_client_request_send()
+                                                            Improved packet length verification.
+                                                            Fixed the issue of reconnection.
+                                                            Improved string length verification.
+                                                            Fixed the bug of packet release.
+            nx_web_http_client.h                            Included necessary headers.
+                                                            Improved string length verification.
+            nx_web_http_server.c                            Check content length in _nxe_web_http_server_packet_content_find().
+                                                            Fixed buffer size for DELETE method in _nx_web_http_server_digest_authenticate().
+                                                            Improved logic to avoid timing attack in _nx_web_http_server_digest_authenticate()
+                                                              and _nx_web_http_server_basic_authenticate().
+                                                            Added digest authentication callback support.
+                                                            Improved packet length verification.
+                                                            Fixed return value when suffix was not found.
+                                                            Improved string length verification.
+                                                            Created function nx_web_http_server_type_retrieve() as 
+                                                              an alternative to nx_web_http_server_type_get().
+            nx_web_http_server.h                            Included necessary headers.
+                                                            Added digest authentication callback support.
+                                                            Improved string length verification.
+            nx_tcpserver.c                                  Fixed socket state check on receiving RST packet.
+                                                            Fixed session reuse issue in _nx_tcpserver_data_process().                                                            
+                                                            
+
+Release 5.11  07-15-2018
+
+            nx_auto_ip.c                                    Modified comments.
+            nx_auto_ip.h                                    Modified comments.
+            
+            bsd_demo_raw.c                                  Supported for disabling IPv4 feature.
+            bsd_demo_tcp.c                                  Supported for disabling IPv4 feature.
+            bsd_demo_udp.c                                  Supported for disabling IPv4 feature.
+            nxd_bsd.c                                       Improved internal logic.
+                                                            Modified API functions:
+                                                              getaddrinfo - Fixed a bug that AF_INET info was returned even ai_family was set to AF_INET6.
+                                                              inet_pton - Fixed compiler warnings.
+                                                                          Fixed endian issue for IPv6 address when ntohl is not defined.
+                                                              nx_bsd_socket_set_inherited_settings - Removed NX_BSD_INHERIT_LISTENER_SOCKET_SETTINGS.
+                                                              nx_bsd_raw_packet_info_extract - Used interface index since nx_interface_ip_instance 
+                                                                                               is removed from interface structure.
+                                                            Removed NetX trace event.
+                                                            Supported for disabling IPv4 feature.
+                                                            Modified internal functions:
+                                                              nx_bsd_udp_receive_notify - used API to receive UDP packet to verify checksum.
+                                                              nx_bsd_udp_packet_received - used API to receive UDP packet to verify checksum.
+                                                              _nxd_bsd_ipv6_packet_send - Checked interface for router lookup.
+                                                            Moved destination and ND cache tables to IP structure.
+            nxd_bsd.h                                         Removed NX_BSD_INHERIT_LISTENER_SOCKET_SETTINGS which is now enabled, not optional
+                                                              and NX_BSD_TIMED_WAIT_TIMEOUT - no longer in use.
+                                                            Used time_t from time.h.                                                             
+
+            demo_netxduo_dhcp.c                             Corrected the host name.
+            nxd_dhcp_client.c                               Returned the option value as host byte order.
+                                                            Function is modified:
+                                                              _nx_dhcp_interface_user_option_retrieve()
+                                                            Fixed compiler errors when event trace is enabled.
+                                                              Function is modified:
+                                                              _nx_dhcp_client_send_with_zero_source_address()
+                                                            Added a check for invalid characters in the host name.
+                                                              Function is modified:
+                                                              _nx_dhcp_create() 
+                                                            Improved packet length verification.
+                                                              Function is modified:
+                                                              _nx_dhcp_packet_process()
+                                                            Supported for adding user supplied options.
+                                                              Functions are added or modified:
+                                                              _nx_dhcp_send_request_internal()
+                                                              _nx_dhcp_user_option_add_callback_set()
+                                                              _nxe_dhcp_user_option_add_callback_set()
+                                                            Fixed a bug that mutex is not released before return.
+                                                              Function is modified:
+                                                              _nx_dhcp_client_send_with_zero_source_address()
+            nxd_dhcp_client.h                               Added a status for invalid characters in the host name.
+                                                            Supported for adding user supplied options.
+                                                            Updated the default value of NX_DHCP_CLIENT_MAX_RECORDS. 
+            nxd_dhcp_server.c                               Fixed an error checking for interface index in _nx_dhcp_create_server_ip_address_list().
+                                                            Removed #if 0 code for feature never implemented in
+                                                              _nx_dhcp_server_extract_information().
+                                                            Improved internal logic.
+                                                            Fixed a compiler warning.
+            nxd_dhcp_server.h                               Removed unused symbol:NX_DHCP_CLIENT_IDENTIFIER_MAX.
+            demo_netxduo_dhcpv6.c                           Corrected the symbol name and value for hardware type.
+            demo_netxduo_dhcpv6_client.c                    Corrected the symbol name and value for hardware type.
+            nxd_dhcpv6_client.c                             Corrected the symbol name and value for hardware type.
+                                                              Function is modified:
+                                                              _nxe_dhcpv6_create_client_duid()
+                                                            Added support for EUI-64 hardware type.  
+                                                              Functions are modified:
+                                                              _nx_dhcpv6_add_client_duid()
+                                                              _nx_dhcpv6_add_server_duid()
+                                                              _nx_dhcpv6_create_client_duid()
+                                                              _nx_dhcpv6_process_client_duid()
+                                                              _nx_dhcpv6_process_server_duid()
+                                                              _nxe_dhcpv6_create_client_duid()
+                                                            Added function to set the destination address where DHCP message should be sent.
+                                                              Functions are modified:
+                                                              _nx_dhcpv6_client_create()
+                                                              _nx_dhcpv6_client_set_destination_address()
+                                                              _nxe_dhcpv6_client_set_destination_address()
+                                                            Corrected the logic for setting the source address.  
+                                                              Function is modified:
+                                                              _nx_dhcpv6_send_request()
+                                                            Supported for rapid option.
+                                                              Function is modified:
+                                                              _nx_dhcpv6_scan_packet_options()
+                                                            Improved packet length verification.
+                                                              Function is modified:
+                                                              _nx_dhcpv6_packet_process()
+                                                            Improved internal logic.
+                                                              Function is modified:
+                                                              _nx_dhcpv6_add_client_ia()
+                                                              _nx_dhcpv6_client_create()
+                                                              _nx_dhcpv6_create_client_duid()
+                                                              _nx_dhcpv6_get_valid_ip_address_lease_time()
+                                                              _nx_dhcpv6_process_domain_name()
+                                                              _nx_dhcpv6_process_server_duid()
+                                                              _nx_dhcpv6_remove_assigned_address()
+                                                            Added support for setting DHCPv6 server as default router.
+                                                              Functions are modified:
+                                                              _nx_dhcpv6_packet_process()
+                                                              _nx_dhcpv6_register_IP_address()
+                                                              _nx_dhcpv6_remove_assigned_address()          
+            nxd_dhcpv6_server.c                             Fixed the bug for checking length.
+                                                            Function is modified:
+                                                              _nx_dhcpv6_server_process_iana()
+                                                            Improved packet length verification.
+                                                              Function is modified:
+                                                              _nx_dhcpv6_listen_for_messages()
+                                                            Improved internal logic.
+                                                              Functions are modified:
+                                                              _nx_dhcpv6_assign_ip_address()
+                                                              _nx_dhcpv6_find_client_record_by_duid()
+                                                              _nx_dhcpv6_add_ip_address_lease()
+                                                              _nx_dhcpv6_create_ip_address_range()
+                                                              _nx_dhcpv6_reserve_ip_address_range()
+                                                              _nx_dhcpv6_retrieve_client_record()
+                                                              _nx_dhcpv6_server_utility_time_randomize()
+            nxd_dhcpv6_server.h                             Corrected the symbol name and value for hardware type.
+            
+            demo_netxduo_dns.c                              Supported for disabling IPv4 feature.
+            nxd_dns.c                                       Added the check for record count pointer.
+                                                            Functions are modified: 
+                                                              _nxe_dns_ipv4_address_by_name_get()
+                                                              _nxde_dns_ipv6_address_by_name_get()
+                                                              _nxe_dns_domain_name_server_get()
+                                                              _nxe_dns_domain_mail_exchange_get()
+                                                              _nxe_dns_domain_service_get()
+                                                            Supported for disabling IPv4 feature.
+                                                            Dropped the chained packet to avoid memory overflow.
+                                                            Improved packet length verification.
+                                                            Fixed a bug that mutex is not released before return.
+                                                            Improved internal logic.
+                                                              Functions are modified:
+                                                              _nx_dns_cname_get()
+                                                              _nx_dns_host_text_get()
+                                                              _nx_dns_authority_zone_start_get()
+                                                              _nx_dns_host_resource_data_by_name_get()
+                                                              _nx_dns_response_process()
+                                                              _nx_dns_server_remove_internal()
+                                                              _nx_dns_process_cname_type()
+                                                              _nx_dns_process_txt_type()
+                                                              _nx_dns_process_soa_type()
+                                                              _nx_dns_cache_add_string()
+                                                              _nx_dns_cache_delete_string()
+
+            nxd_ftp_client.c                                Supported for disabling IPv4 feature. 
+                                                            Dropped the chained packet to avoid memory overflow.
+                                                            Improved internal logic.
+            nxd_ftp_server.c                                Made the sprintf formats the same for LIST the command case in nx_ftp_server_command_process().
+                                                            Added a sanity check for minimum packet payload size of the FTP server in _nx_ftp_server_create_internal().
+                                                            Supported for disabling IPv4 feature.
+                                                            Dropped the chained packet to avoid memory overflow.
+                                                            Improved internal logic.
+                                                            Corrected the logic for processing login/out.
+                                                            Fixed a bug that causes crash when month is invalid.
+            nxd_ftp_server.h                                Created a configuration option for defining minimum FTP server packet pool payload, NX_FTP_SERVER_MIN_PACKET_PAYLOAD,
+                                                              and created an error status NX_FTP_INSUFFICIENT_PACKET_PAYLOAD if the payload is too small.     
+                                                            Supported for disabling IPv4 feature. 
+                                                            
+            demo_netxduo_http.c                             Supported for disabling IPv4 feature.
+            nxd_http_server.c                               Fixed the logic for multi packet GET request.
+                                                            Improved internal logic.
+            nxd_http_client.c                               Supported for disabling IPv4 feature. 
+
+            nxd_mqtt_client.c                               Improved packet length verification.
+                                                            Removed the usage of global variable for MQTT client.
+                                                            Added logic to prevent packet ID value from being zero.
+                                                            Fixed a bug that packet may be queued by TLS and can not be received.
+                                                            Added a symbol for user to set initial packet ID value.
+                                                            Improved internal logic.
+                                                            Modified _nxd_mqtt_process_disconnect to use the NXD_MQTT_SOCKET_TIMEOUT as the wait option
+                                                            Modified _nxd_mqtt_packet_allocate to use TLS packet allocate for TLS socket.  TLS packet allocate routine is able to 
+                                                              take into consideration the TLS header size, including the crypto initial vector area.
+                                                            Modified _nxd_mqtt_client_publish to fix packet leak, and use packet append API instead of memcpy to prevent data 
+                                                              overflow the packet strcutre.
+                                                            Modified _nxd_mqtt_client_sub_unsub to fix a ptoential packet leak under error conditions.
+                                                            Modified _nxd_mqtt_client_disconnect to not exit if the send message calls returns an error. Added a call to delete the timer
+                                                              so that a subsequent connect call will not error out when it tries to create the already existing timer. 
+                                                            Modified _nxd_mqtt_thread_entry to delete the TCP socket. Added logic to check if 
+                                                              timer, event flag group are already deleted before deleting. Moved the socket delete call to the end of the function  
+                                                            Modified _nxd_mqtt_client_create to create the socket instead of in the connect call. Delete the MQTT thread if an error occurs.
+                                                            Modified _nxd_mqtt_client_connect to remove the socket create call, and removed socket delete calls where an error is handled. 
+                                                            Delete the timer if an error occurs. Replaced NX_WAIT_FOREVER with NXD_MQTT_SOCKET_TIMEOUT on the socket receive calls.  
+                                                            Modified _nxd_mqtt_client_delete to wait for the nxd_mqtt_client_thread_entry to complete processing the DELETE event. 
+                                                            Modified _nxde_mqtt_client_login_set to allow user to set username but not password.
+                                                            Added call to delete the MQTT thread after the DELETE event is finished processing. 
+                                                            Supported user defined memory functions.
+                                                            Added symbols NXD_MQTT_REQUIRE_TLS, NXD_MQTT_SECURE_MEMCPY, NXD_MQTT_SECURE_MEMCMP, NXD_MQTT_SECURE_MEMSET, NXD_MQTT_SECURE_MEMMOVE for
+                                                              security requirement.
+                                                            Checked topic name and message lengths in runtime.
+                                                            Allowed zero length of username and password.  
+            nxd_mqtt_client.h                               Added NXD_MQTT_SOCKET_TIMEOUT to put a finite timeout for nx_tcp_socket_disconnect. 
+                                                            The default value is NX_WAIT_FOREVER so no difference in behavior should be observed. 
+                                                            Supported user defined memory functions. 
+
+            nx_nat.c                                        Set different timeout for TCP and non-TCP seesion.
+                                                            Functions are modified:
+                                                              _nx_nat_inbound_entry_find()
+                                                              _nx_nat_outbound_entry_find()
+                                                            Added support for replacement when cache is full.
+                                                              Function is modified:
+                                                              _nx_nat_entry_create()
+                                                            Corrected the logic for appending the overflowing data to the new packet.
+                                                              Function is modified:
+                                                              _nx_nat_ip_packet_send()
+                                                            Improved packet length verification.
+                                                              Function is modified:
+                                                              _nx_nat_process_packet()
+            nx_nat.h                                        Added symbols for TCP and non-TCP session timeout.
+                                                            Added NX_NAT_ENABLE_REPLACEMENT.   
+
+            demo_netxduo_pop3_client.c                      Increased packet payload to 1460 from 500, and clear final_packet local variable in
+                                                            the loop that iterates to capture all the packets in a mail item.
+
+            nxd_pop3_client.c                               Corrected the logic in _nx_pop3_client_mail_item_message_get for handling packets with only
+                                                              the POP3 end marker tag indicating end of mail message.
+                                                            Supported for disabling IPv4 feature.
+                                                            Dropped the chained packet to avoid memory overflow.
+                                                            Improved internal logic.
+                                                            Fixed the logic for handling message and command in one packet.
+            nxd_pop3_client.h                               Fixed the logic for handling message and command in one packet. 
+
+            nx_ppp.c                                        Supported for transmitting PPP over Ethernet.
+                                                            Functions are modified or added:
+                                                              _nx_ppp_netx_packet_transfer()
+                                                              _nx_ppp_packet_receive()
+                                                              _nx_ppp_packet_send_set()
+                                                              _nx_ppp_packet_transmit()
+                                                              _nx_ppp_process_deferred_raw_string_send()
+                                                              _nx_ppp_receive_packet_get()
+                                                              _nx_ppp_thread_entry()
+                                                              _nxe_ppp_packet_receive()
+                                                              _nxe_ppp_packet_send_set()
+                                                              _nxe_ppp_create()
+                                                              
+                                                              _nx_ppp_crc_append()
+                                                              _nx_ppp_process_deferred_ip_packet_send()
+                                                              _nx_ppp_lcp_code_reject()
+                                                              _nx_ppp_lcp_configure_reply_send()
+                                                              _nx_ppp_lcp_configure_request_send()
+                                                              _nx_ppp_lcp_configuration_retrieve()
+                                                              _nx_ppp_lcp_state_machine_update()
+                                                              _nx_ppp_lcp_terminate_ack_send()
+                                                              _nx_ppp_lcp_terminate_request_send()
+                                                              _nx_ppp_pap_authentication_request()
+                                                              _nx_ppp_pap_authentication_ack()
+                                                              _nx_ppp_pap_authentication_nak()
+                                                              _nx_ppp_pap_login_valid()
+                                                              _nx_ppp_pap_state_machine_update()
+                                                              _nx_ppp_chap_challenge_send()
+                                                              _nx_ppp_chap_challenge_respond()
+                                                              _nx_ppp_chap_challenge_validate()
+                                                              _nx_ppp_chap_state_machine_update()
+                                                              _nx_ppp_ipcp_configure_check()
+                                                              _nx_ppp_ipcp_configure_request_send()
+                                                              _nx_ppp_ipcp_response_extract()
+                                                              _nx_ppp_ipcp_response_send()
+                                                              _nx_ppp_ipcp_state_machine_update()
+                                                              _nx_ppp_ipcp_terminate_ack_send()
+                                                              _nx_ppp_ipcp_terminate_send()
+                                                              _nx_ppp_raw_string_send()
+                                                              _nx_ppp_receive_packet_process()                                                              
+                                                            Added state check before start PAP, CHAP and IPCP.
+                                                              _nx_ppp_packet_receive()
+                                                            Corrected the logic for stopping PPP.
+                                                              Functions are modified:
+                                                              _nx_ppp_thread_entry()
+                                                              _nx_ppp_lcp_state_machine_update()
+                                                            Corrected the logic for processing LCP message.
+                                                              Function is modified: 
+                                                              _nx_ppp_receive_packet_process()
+                                                            Corrected the logic for setting gateway address.
+                                                              Function is modified: 
+                                                              _nx_ppp_ipcp_state_machine_update()
+                                                            Set the flag to distinguish PPP Server and PPP Client.
+                                                              Function is modified: 
+                                                              _nx_ppp_receive_packet_process()
+                                                            Added functions to stop/start PPP.
+                                                              Function are modified:
+                                                              _nx_ppp_start()
+                                                              _nx_ppp_stop()
+                                                              _nxe_ppp_start()
+                                                              _nxe_ppp_stop()
+                                                            Improved packet length verification.
+                                                              Function are modified:
+                                                              _nx_ppp_chap_challenge_respond()
+                                                              _nx_ppp_chap_challenge_validate()
+                                                              _nx_ppp_ipcp_configure_check()
+                                                              _nx_ppp_ipcp_response_extract()
+                                                              _nx_ppp_pap_login_valid()
+                                                              _nx_ppp_receive_packet_process()
+                                                            Improved internal logic.
+                                                              Function are modified:
+                                                              _nx_ppp_chap_challenge_respond()
+                                                              _nx_ppp_chap_challenge_validate()
+                                                              _nx_ppp_chap_state_machine_update()
+                                                              _nx_ppp_ipcp_state_machine_update()
+                                                              _nx_ppp_lcp_state_machine_update()
+                                                              _nx_ppp_pap_state_machine_update()
+                                                            Added echo request statistics and corrected the length field in _nx_ppp_ping_request().
+            nx_ppp.h                                        Supported for transmitting PPP over Ethernet.
+                                                            Added functions to stop/start PPP.  
+
+            demo_netxduo_smtp_client.c                      Supported for disabling IPv4 feature.
+            nxd_smtp_client.c                               Fix compiler errors when event trace is enabled.
+                                                            Supported for disabling IPv4 feature.
+                                                            Dropped the chained packet to avoid memory overflow.
+                                                            Improved packet length verification.
+            nxd_smtp_client.h                               Removed unused API macro nxd_smtp_mail_send. 
+
+            nxd_snmp.c                                      Supported for disabling IPv4 feature.
+                                                            Dropped the chained packet to avoid memory overflow.
+                                                            Added buffer length check.
+                                                            Fixed packet leak issue.
+                                                            Modified logic of converting to UCHARs for the buffer.
+                                                            Removed logic setting boot count to one if not set.
+                                                            Fixed a bug to use the trap security flags instead of the agent security flags.
+                                                            Fixed bug to use context name from get request if agent context name not set.
+                                                            Improved internal logic.
+                                                            Modified nx_snmpv3_agent_engineboot_set to accept boot count of zero
+                                                            Fixed nx_snmp_utility_object_data_get, nx_snmp_object_counter64_get/set, 
+                                                              nx_snmp_object_octet_string.get for errors in data processing.
+                                                             Added new parsing route nx_snmp_tlv_parse_data to parse the Type-Length-Value
+                                                              field as per ASN1 specificactions, this also handles the 'long form' for integer types
+                                                            Added check for counter64 type to nx_snmp_v1/v2/v3_processing 
+                                                            Added an error response to nx_snmp_v1/v2/v3_processing if nx_snmp_object_data_get returns an error
+                                                              instead of failing silently.
+                                                            Modified nx_snmp_utility_object_data_get to accept a null IPv4 address. 
+            nxd_snmp.h                                      Removed #include nx_tcp.h
+                                                            Added macros for ASN1/BER standard symbols used in TLV parsing routine 
+                                                            Added new error returns relevant to the TLV parsing added.
+                                                            Redefined IPv6 address type as NX_SNMP_ASN1_OCTET_STRING
+            demo_snmp_helper.h                              Removed #include nx_tcp.h and references to TCP configuration options defined in nx_tcp.h.
+                                                            Added a get_octet_callback() which is similar to the get_callback except that it includes the length
+                                                               arguement to accomodate the nx_snmp_object_octet_string_get API
+                                                            Added a length field to MIB table for reading octet strings which not 0x0 delimited. 
+                                                            Simplified the table to a few dozen OIDs instead of a hundreds of OID for ease of use.
+                                                            Added atIPv6NetworkAddress[16] and MIB table entry for it for testing IPv6 address types
+            demo_netxduo_snmp.c                             Simplified mib2_variable_update to be a comment that this is where MIB data can be updated at runtime. 
+                                                            Removed printf statements.
+                                                            Added check of status returns from SNMP API that were missing them. 
+            demo_netxduo_mib2.c                             Removed the demo file since demo_netx_snmp.c is sufficient to demonstrate the use of SNMP API
+                                                              for managing the MIB table.
+
+            nxd_sntp_client.c                               Modified nx_sntp_client_utility_convert_seconds_to_date causing the date to be off by one day if NX_SNTP_CURRENT_YEAR
+                                                              is older than the current date and a leapyear has occurred between that year and the current date.
+                                                            Removed useless code.
+                                                            Supported for disabling IPv4 feature.
+                                                            Improved internal logic.
+            nxd_sntp_client.h                               Modified comments.        
+
+            nxd_telnet_client.h                             Removed NX_TELNET_MAX_OPTION_SIZE option and 
+                                                              nx_telnet_client_request_option from CLIENT_REQUEST structure.
+            nxd_telnet_client.c                             Supported for disabling IPv4 feature.
+            nxd_telnet_server.c                             Dropped the chained packet to avoid memory overflow.
+
+            nxd_tftp_client.c                               Supported for disabling IPv4 feature.            
+                                                            Improved packet length verification.
+                                                            Corrected the field size of block number.
+            nxd_tftp_server.c                               Improved packet length verification.
+                                                            Improved internal logic.
+                                                            Corrected the field size of block number.
+            nxd_tftp_client.h                               Corrected the field size of block number.
+            nxd_tftp_server.h                               Corrected the field size of block number. 
+
+            nx_web_http_client.c                            Added support for chunked transfer. Functions are added or modified:
+                                                              _nx_web_http_client_chunked_size_get()
+                                                              _nx_web_http_client_cleanup()
+                                                              _nx_web_http_client_memicmp()
+                                                              _nx_web_http_client_process_header_fields()
+                                                              _nx_web_http_client_response_body_get()
+                                                              _nx_web_http_client_response_read()
+                                                              _nx_web_http_client_response_byte_expect()
+                                                              _nx_web_http_client_response_chunked_get()
+                                                              _nx_web_http_client_request_chunked_set()
+                                                              _nx_web_http_client_request_packet_send()
+                                                              _nx_web_http_client_request_initialize()
+                                                              _nxe_web_http_client_request_chunked_set()
+                                                              _nxe_web_http_client_request_packet_send()
+                                                              _nx_web_http_client_delete()
+                                                            Corrected the TCP header size in _nxe_web_http_client_put_packet().
+                                                            Added support for keep-alive. Functions are added or modified:
+                                                              _nx_web_http_client_connect()
+                                                              _nx_web_http_client_process_header_fields()
+                                                              _nx_web_http_client_secure_connect()
+                                                            Corrected the wait option.
+                                                            Functions are modified:
+                                                              _nx_web_http_client_request_initialize()
+                                                              _nx_web_http_client_request_header_add()
+                                                              _nx_web_http_client_request_send()
+                                                            Added support for returning all the status code in _nx_web_http_client_response_body_get().
+                                                            Fixed the issue of TCP socket cleanup in _nx_web_http_client_secure_connect().
+            nx_web_http_client.h                            Added support for chunked transfer.
+                                                            Added support for keep-alive.
+                                                            Added support for returning all the status code.
+            nx_web_http_server.c                            Added support for chunked transfer. Functions are added or modified:
+                                                              _nx_web_http_server_content_get()
+                                                              _nx_web_http_server_packet_content_find()
+                                                              _nx_web_http_server_packet_get()
+                                                              _nx_web_http_server_content_get_extended()
+                                                              _nx_web_http_server_receive_data()
+                                                              _nx_web_http_server_get_process()
+                                                              _nx_web_http_server_put_process()
+                                                              _nx_web_http_server_callback_packet_send()
+                                                              _nx_web_http_server_request_read()
+                                                              _nx_web_http_server_request_byte_expect()
+                                                              _nx_web_http_server_chunked_size_get()
+                                                              _nx_web_http_server_request_chunked_get()
+                                                              _nxe_web_http_server_response_chunked_set()
+                                                              _nx_web_http_server_response_chunked_set()
+                                                              _nx_web_http_server_chunked_check()
+                                                              _nx_web_http_server_get_entity_header()
+                                                              _nx_web_http_server_boundary_find()
+                                                            Modified packet allocation function. Functions are added or modified:
+                                                              _nx_web_http_server_basic_authenticate()
+                                                              _nx_web_http_server_calculate_content_offset()
+                                                              _nx_web_http_server_callback_data_send()
+                                                              _nx_web_http_server_digest_authenticate()
+                                                              _nx_web_http_server_get_process()
+                                                              _nx_web_http_server_generate_response_header()
+                                                              _nx_web_http_server_response_packet_allocate()
+                                                              _nxe_web_http_server_response_packet_allocate()
+            nx_web_http_server.h                            Added support for chunked transfer.
+                                                            Added packet allocation function.
+            nx_tcpserver.c                                  Corrected the wait time of TCP server socket accepting in _nx_tcpserver_connect_process().
+            nx_tcpserver.h                                  Modified the default thread priority of TCP server.
+            nx_web_http_common.h                            Added support for returning all the status code.
+            demo_netxduo_https.c                            Fixed the compile errors.            
+                                                
+                                                
+Release 5.10  05-10-2016
+
+            nx_auto_ip.c                                    Optimized the logic for detecting address conflict.
+                                                            Functions are modified or deleted:
+                                                               _nx_auto_ip_arp_packet_send()
+                                                               _nx_auto_ip_conflict()
+                                                               _nx_auto_ip_create()
+                                                               _nx_auto_ip_delete()
+                                                               _nx_auto_ip_thread_entry()
+                                                            Fixed the bug for checking interface status.
+                                                            Function is modified:
+                                                              _nx_auto_ip_thread_entry()                                                       
+            nx_auto_ip.h                                      Optimized the logic for detecting address conflict.
+            
+            nxd_bsd.c                                       Included internal header file in C file.
+                                                            Modified API functions:
+                                                              getsockopt - Optimized the logic for keepalive feature.
+                                                              recv - Added support for thread preemption.
+                                                              setsockopt - Optimized the logic for keepalive feature.
+                                                              socket - Optimized the logic for keepalive feature.
+                                                              inet_ntop - Fixed endian swap when ntohl is not defined.
+                                                            Modified internal functions:
+                                                              _nxd_bsd_ipv6_packet_send - Modified the parameter list of _nx_icmpv6_send_ns.
+                                                              inet_ntoa_internal - Fixed endian swap when ntohl is not defined.
+                                                              nx_bsd_find_interface_by_source_addr - Fixed endian swap when ntohl is not defined.
+                                                              nx_bsd_send_internal - Added a case for the error status NX_NO_PACKET.
+            nxd_bsd.h                                       Included internal header file in C file.
+            
+            nxd_dhcp_client.c                               Optimized the logic for detecting address conflict.
+                                                              The following functions are modified or added: 
+                                                              _nx_dhcp_client_send_arp_probe()
+                                                              _nx_dhcp_create()
+                                                              _nx_dhcp_delete()
+                                                              _nx_dhcp_ip_conflict()
+                                                              _nx_dhcp_process()
+                                                            Corrected the logic for setting the broadcast bit.
+                                                              The following functions are modified:
+                                                              _nx_dhcp_send_request_internal()
+                                                            Corrected the logic for setting the target IP address.
+                                                              The following functions are modified:
+                                                              _nx_dhcp_send_request_internal()
+                                                            Modified the logic for processing DHCP options.
+                                                              The following functions are modified:
+                                                              _nx_dhcp_extract_information()
+                                                              _nx_dhcp_user_option_retrieve()
+                                                              _nx_dhcp_get_option_value()
+                                                              _nx_dhcp_search_buffer()
+                                                            Added support for DHCP on multiple interfaces.
+                                                              The following API are modified or added: 
+                                                              _nx_dhcp_create()
+                                                              _nx_dhcp_clear_broadcast_flag()
+                                                              _nx_dhcp_client_send_with_zero_source_address()
+                                                              _nx_dhcp_delete()
+                                                              _nx_dhcp_decline()
+                                                              _nx_dhcp_extract_information()
+                                                              _nx_dhcp_force_renew()
+                                                              _nx_dhcp_packet_process()
+                                                              _nx_dhcp_reinitialize()
+                                                              _nx_dhcp_release()
+                                                              _nx_dhcp_request_client_ip()
+                                                              _nx_dhcp_resume()
+                                                              _nx_dhcp_suspend()     
+                                                              _nx_dhcp_send_request()
+                                                              _nx_dhcp_send_request_internal()
+                                                              _nx_dhcp_server_address_get()
+                                                              _nx_dhcp_set_interface_index()
+                                                              _nx_dhcp_start()
+                                                              _nx_dhcp_stop()
+                                                              _nx_dhcp_thread_entry()
+                                                              _nx_dhcp_timeout_entry()
+                                                              _nx_dhcp_timeout_process()
+                                                              _nx_dhcp_udp_receive_notify()
+                                                              _nx_dhcp_user_option_retrieve()  
+                                                              _nx_dhcp_client_get_record()
+                                                              _nx_dhcp_client_restore_record()
+                                                              _nx_dhcp_client_update_time_remaining()
+                                                              _nx_dhcp_client_interface_get_record()
+                                                              _nx_dhcp_client_interface_restore_record()
+                                                              _nx_dhcp_client_interface_update_time_remaining()
+                                                              _nx_dhcp_interface_clear_broadcast_flag()
+                                                              _nx_dhcp_interface_enable()
+                                                              _nx_dhcp_interface_disable()
+                                                              _nx_dhcp_interface_decline()
+                                                              _nx_dhcp_interface_force_renew()
+                                                              _nx_dhcp_interface_reinitialize()
+                                                              _nx_dhcp_interface_release()
+                                                              _nx_dhcp_interface_request_client_ip()
+                                                              _nx_dhcp_interface_start()
+                                                              _nx_dhcp_interface_stop()
+                                                              _nx_dhcp_interface_send_request()
+                                                              _nx_dhcp_interface_server_address_get()
+                                                              _nx_dhcp_interface_state_change_notify()
+                                                              _nx_dhcp_interface_user_option_retrieve()
+                                                              _nx_dhcp_interface_record_find()
+                                                              _nxe_dhcp_interface_clear_broadcast_flag()   
+                                                              _nxe_dhcp_interface_enable()
+                                                              _nxe_dhcp_interface_disable()
+                                                              _nxe_dhcp_interface_decline()  
+                                                              _nxe_dhcp_interface_force_renew()    
+                                                              _nxe_dhcp_interface_reinitialize() 
+                                                              _nxe_dhcp_interface_release()      
+                                                              _nxe_dhcp_interface_request_client_ip()
+                                                              _nxe_dhcp_interface_start()
+                                                              _nxe_dhcp_interface_stop()   
+                                                              _nxe_dhcp_interface_send_request()
+                                                              _nxe_dhcp_interface_server_address_get() 
+                                                              _nxe_dhcp_interface_state_change_notify()
+                                                              _nxe_dhcp_interface_user_option_retrieve()
+                                                              _nxe_dhcp_client_interface_get_record()         
+                                                              _nxe_dhcp_client_interface_restore_record() 
+                                                              _nxe_dhcp_client_interface_update_time_remaining()
+                                                            Modified the logic for updating DHCP timeout. 
+                                                             The following functions are modified:
+                                                              _nx_dhcp_update_timeout() 
+                                                              _nx_dhcp_packet_process()
+                                                              _nx_dhcp_timeout_entry()
+                                                              _nx_dhcp_interface_record_find()
+                                                              _nx_dhcp_ip_conflict()
+                                                              _nx_dhcp_thread_entry()
+            nxd_dhcp_client.h                               Fixed compiler warnings.
+                                                            Modified the logic for processing DHCP options.
+                                                            Added support for DHCP on multiple interfaces.
+            nxd_dhcp_server.c                               Added flag events to process packet receive event, fast periodic event and slow periodic event.
+                                                            Functions are modified or renamed: 
+                                                              _nx_dhcp_server_create()
+                                                              _nx_dhcp_server_delete()
+                                                              _nx_dhcp_fast_periodic_timer_entry()
+                                                              _nx_dhcp_slow_periodic_timer_entry()
+                                                              _nx_dhcp_server_thread_entry()
+                                                              _nx_dhcp_listen_for_messages()
+                                                              _nx_dhcp_server_packet_process()
+                                                            Fixed packet leaks in _nx_dhcp_respond_to_client_message().
+                                                            Added mutex protection.
+                                                              Functions are modified: 
+                                                              _nx_dhcp_create_server_ip_address_list()
+                                                              _nx_dhcp_set_interface_network_parameters()
+                                                              _nx_dhcp_clear_client_record()
+            nxd_dhcp_server.h                               Added flag events to process packet receive event, fast periodic event and slow periodic event.            
+            nxd_dhcpv6_server.c                             Fixed the typo, rename NX_DHCPV6_STATUS_NO_ADDRS_AVAILABLE to NX_DHCPV6_STATUS_MESSAGE_NO_ADDRS_AVAILABLE.
+            nxd_dhcpv6_server.h                             Fixed the typo, rename NX_DHCPV6_STATUS_NO_ADDRS_AVAILABLE to NX_DHCPV6_STATUS_MESSAGE_NO_ADDRS_AVAILABLE.
+            
+            nxd_ftp_server.c                                Renamed _nx_ftp_server_control_disonnect_processing to nx_ftp_server_control_disconnect_processing.
+                                                            Added a check on status return from FileX file write and file create calls in _nx_ftp_server_command_process
+                                                              and _nx_ftp_server_data_process. 
+            nxd_ftp_server.h                                Renamed _nx_ftp_server_control_disonnect_processing to nx_ftp_server_control_disconnect_processing.
+            nxd_ftp_client.c                                Added support for PASV, passive transfer mode
+                                                            Added IPv6 support to nx_ftp_client_directory_listing_get
+            nxd_ftp_client.h                                Added support for PASV, passive transfer mode            
+            
+            demo_netxduo_http.c                             Fix a bug that memory of ram disk is corrupted.
+            nxd_http_client.c                               Allow zero or more whitespaces between Content-Length and value
+                                                             in nx_http_client_content_length_get()                                             
+                                                            Optimized the code.
+                                                             _nx_http_client_content_length_get()
+                                                            Fixed packet leak for invalid HTTP packet in _nxd_http_client_get_start
+                                                             and _nx_http_client_get_packet.
+                                                            Corrected the logic in _nxd_http_client_get_start when checking
+                                                             offset against the packet length
+                                                            Modified nxd_http_client_get_start() and nxd_http_client_put_start()
+                                                             to accept a URI resource string that refers to a full website
+                                                             e.g. http://abc.def.com/index.htm.
+                                                            Added nx_http_client_set_connect_port() service to allow the Client 
+                                                             to change the HTTP server port at runtime. 
+            nxd_http_client.h                               Declare the nx_http_client_set_connect_port() service
+            
+            nxd_pop3_client.c                               Returned NX_SUCCESS only if the positive response consists of "+OK".
+                                                            Functions are modified:
+                                                              _nx_pop3_client_mail_item_get()
+                                                              _nx_pop3_client_mail_item_delete()
+                                                              _nx_pop3_client_quit()
+
+
+Release 5.9   02-22-2016
+
+            demo_netx_auto_ip.c                             Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.
+                                                            Fixed compiler warnings.
+                                                             
+            nx_auto_ip.c                                    Fixed one bug that hardware address is set as zero if IP instance is uninitialized.
+                                                            Fixed compiler warnings.
+                                                            Corrected the value of NX_AUTO_IP_END_ADDRESS.
+                                                             
+            bsd_demo_raw.c                                  Unified ticks per second. 
+                                                            Fixed compiler warnings.
+            bsd_demo_tcp.c                                  Unified ticks per second. 
+                                                            Fixed compiler warnings.
+            bsd_demo_udp.c                                  Unified ticks per second. 
+                                                            Fixed compiler warnings.
+            nxd_bsd.c                                       Fixed compiler warnings.
+                                                            Modified API functions:
+                                                              bsd_initialize - Returned error when extended notify feature was disabled.
+                                                              recv - Fixed return value when peer shutdown orderly.
+                                                                     Fixed statistics of TCP socket.
+                                                              send - Fixed length of data sent.
+                                                              sendto - Fixed length of data sent.
+                                                              connect - Fixed errno when connection timeouts.
+                                                              bind - Added logic to allow TCP IPv4 and IPv6 sockets to share a port if reuse is enabled 
+                                                                     on the sockets (which it is by default. This lets BSD emulate a TCP client socket that accepts
+                                                                     and transmits IPv4 and IPv6 packets. 
+                                                              inet_addr - Corrected the status process of inet_aton.
+                                                              setsockopt - Unified ticks per second. 
+                                                                           Added support for SO_SNDTIMEO option.
+                                                                           Renamed symbols from NX_TCP_ENABLE_KEEPALIVE to NX_ENABLE_TCP_KEEPALIVE,
+                                                                           and from NX_TCP_ENABLE_WINDOW_SCALING to NX_ENABLE_TCP_WINDOW_SCALING.
+                                                              select - Unified ticks per second. 
+                                                                       Fixed statistics of TCP socket.
+                                                            Modified internal functions:
+                                                              bsd_initialize - Used tx_thread_sleep instead of setting event from timer.
+                                                              nx_bsd_select_wakeup - Cleared fd_sets in suspend info if they were not met.
+                                                              nx_bsd_send_internal - Supported to return length of data sent. 
+                                                                                     Fixed timeout for packet process.
+                                                                                     Added support for SO_SNDTIMEO option.
+                                                              nx_bsd_socket_set_inherited_settings - Renamed symbols from NX_TCP_ENABLE_KEEPALIVE to NX_ENABLE_TCP_KEEPALIVE,
+                                                                                                     and from NX_TCP_ENABLE_WINDOW_SCALING to NX_ENABLE_TCP_WINDOW_SCALING.
+                                                              nx_bsd_tcp_socket_disconnect_notify - Fixed errno when connection timeouts.
+                                                              nx_bsd_timer_entry - Used tx_thread_sleep instead of setting event from timer.
+                                                              nx_bsd_thread_entry - Used tx_thread_sleep instead of setting event from timer.      
+            nxd_bsd.h                                       Added support for unified timer tick macros.
+                                                            Defined return code for environment error.
+                                                            Modified the type of time_t and suseconds_t from ULONG to LONG.
+
+            demo_netxduo_dhcp.c                             Unified ticks per second.
+                                                            Simplified the demo.
+                                                            Fixed compiler warnings.
+
+            nxd_dhcp_client.c                               Unified ticks per second.
+                                                            Added support for sending maximum DHCP message size option.
+                                                            Changed the logic to check the DHCP state to update the time remaining in renew and rebind states.
+                                                            Optimized the algorithm for calculating random time.
+                                                            Corrected the logic for sending ARP probe and restarting configuration.
+                                                            Fixed compiler warnings.
+                                                            Set the source address field in the IP header to 0 for DHCP messages that client obtaining its IP address.
+            nxd_dhcp_client.h                               Unified ticks per second.
+                                                            Added support for sending maximum DHCP message size option.
+                                                            Added symbol names for sending ARP probe and restarting configuration.
+                                                            Fixed compiler warnings.
+            nxd_dhcp_server.c                               Unified ticks per second in nx_dhcp_server_create(). 
+                                                            Optimized process logic in nx_dhcp_server_thread_entry().         
+                                                            Fixed a packet leak in nx_dhcp_listen_for_message().                                                            
+                                                            Fixed the bug for user options seek in nx_dhcp_server_extract_information.
+                                                            Initialized dhcp client in nx_dhcp_listen_for_message.
+                                                            Copied the incoming data in one packet from dhcp server pool in nx_dhcp_listen_for_messages.
+                                                            Fixed a bug in nx_dhcp_server_extract_information to initialize the dhcp_client_ptr to NULL in the event
+                                                            the function encounters an invalid packet. Previously, the function returned a garbage dhcp_client_ptr to 
+                                                            the caller which would then dereference it and get an exception.                                                            
+                                                            Send NACK message if the client's requested IP address is incorrect in _nx_dhcp_validate_client_message.
+                                                            Simplified the logic to find, record and clear the IP address owner.                                                            
+                                                            Fixed compiler warnings.
+            nxd_dhcp_server.h                               Unified ticks per second.
+                                                            Adjusted the default value of configuration options.                                                    
+                                                            Optimized the structure.  
+            demo_netxduo_dhcpv6.c                           Unified ticks per second.
+                                                            Simplified the demo.
+                                                            Fixed compiler warnings.
+            demo_netxduo_dhcpv6_client.c                    Unified ticks per second.
+                                                            Fixed compiler warnings.
+            nxd_dhcpv6_client.c                             Unified ticks per second.            
+                                                            Verified the incoming data does not exceed our DHCPv6 Client packet payload in _nx_dhcpv6_packet_process().                                                            
+                                                            Fixed the bug for setting IPv6 address change notify in _nx_dhcpv6_client_create().                                                            
+                                                            Fixed the bug for setting address status in _nx_dhcpv6_register_IP_address().
+                                                            Renamed symbols from NX_IPV6_ADDRESS_CHANGE_NOTIFY_ENABLE to NX_ENABLE_IPV6_ADDRESS_CHANGE_NOTIFY,
+                                                              NXDUO_DISABLE_DAD to NX_DISABLE_IPV6_DAD since NetX Duo renamed these symbols.
+                                                            Fixed compiler warnings.
+            nxd_dhcpv6_client.h                             Unified ticks per second.
+                                                            Added conditional code for DAD notify declaration.
+                                                            Renamed symbols from NX_IPV6_ADDRESS_CHANGE_NOTIFY_ENABLE to NX_ENABLE_IPV6_ADDRESS_CHANGE_NOTIFY,
+                                                              NXDUO_DISABLE_DAD to NX_DISABLE_IPV6_DAD since NetX Duo renamed these symbols.
+                                                            Fixed compiler warnings.  
+            nxd_dhcpv6_server.c                             Unified ticks per second.
+                                                            Copied the incoming data in one packet from dhcpv6 server pool in nx_dhcpv6_listen_for_messages.                                                            
+                                                            Fixed the bug for IPv6 address get.
+                                                            Fixed compiler warnings.
+            nxd_dhcpv6_server.h                             Unified ticks per second.            
+                                                            Fixed the bug for IPv6 address get.   
+                                                            
+            demo_netxduo_dns.c                              Unified ticks per second.             
+                                                            Fixed compiler warnings.
+            nxd_dns.h                                       Unified ticks per second.
+                                                            Removed the symbol NX_DNS_CLIENT_IP_GATEWAY_ADDRESS.                                                    
+            nxd_dns.c                                       Unified ticks per second.
+                                                            Modified the logic to send DNS query in _nx_dns_host_resource_rdata_by_name_get and 
+                                                              _nx_dns_host_by_address_get_internal.
+                                                            Modified the return status in _nx_dns_send_query_by_address. 
+                                                            Modified the return status if answer_found is true in _nx_dns_response_process.                                                             
+                                                            Modified the logic for setting the IP gateway server to be the DNS Server in _nx_dns_create.                                                            
+                                                            Added check for malformed packet.                    
+                                                            Fixed compiler warnings.
+                                                            Added the check for record_count_pointer. 
+
+            demo_netxduo_ftp.c                              Unified ticks per second.
+                                                            Fixed compiler warnings.
+            nxd_ftp_client.c                                Fixed compiler warnings.
+            nxd_ftp_server.c                                Cleared socket resource when ftp server is stopped.
+                                                            Optimized the logic.
+                                                            Fixed a bug for calculating the length of file info.
+                                                            Fixed compiler warnings.
+            nxd_ftp_server.h                                Unified ticks per second. 
+                                                            Added event to stop ftp server.  
+
+            demo_netxduo_http.c                             Unified ticks per second. 
+                                                            Fixed compiler warnings.
+            nxd_http_client.h                               Unified ticks per second. 
+            nxd_http_client.c                               Removed trailing space on HTTP/1.0.
+            nxd_http_server.h                               Unified ticks per second. 
+                                                            Declared missing function headers.
+            nxd_http_server.c                               Cleared socket resource when stopped. 
+                                                            Fixed first MIME type in the default array.
+                                                            Fixed compiler warnings.      
+
+            demo_netx_nat.c                                 Unified ticks per second. 
+            nx_nat.c                                        Unified ticks per second.
+                                                            Fixed compiler warnings.
+                                                            Modified the logic for packet processing and sending since all 
+                                                              the fragments are assembled before forwarding.
+                                                              Functions are modified:
+                                                              _nx_nat_process_packet()
+                                                              _nx_nat_ip_packet_send()
+            nx_nat.h                                        Unified ticks per second.  
+
+            demo_netxduo_pop3_client.c                      Unified ticks per second. Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.
+                                                            Fixed compiler errors.
+            nxd_pop3_client.c                               Unified ticks per second. Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.
+                                                            Fixed compiler errors.
+                                                            Fixed number checking.
+            nxd_pop3_client.h                               Unified ticks per second. Used TX_TIMER_TICKS_PER_SECOND as default value of NX_IP_PERIODIC_RATE.    
+
+            demo_netx_ppp.c                                 Unified ticks per second.
+                                                            Fixed compiler warnings.
+            nx_ppp.c                                        Replaced hard numbers with PPP symbols for PPP codes, protocols, options and protocol states.
+                                                            Added _nx_ppp_debug_log_capture_protocol function to outputs the status of various protocols and timeouts of the specified PPP instance.
+                                                            Added support for the secondary DNS option in the IPCP protocol.
+                                                            Added a retry limit on IPCP NAK list requests with primary and secondary DNS options so that
+                                                              IPCP can complete if either address is not available.
+                                                            Added NXE function for error checking.
+                                                            Fixed compiler warnings.
+            nx_ppp.h                                        Unified ticks per second.
+                                                            Defined PPP symbols for naked list options.
+                                                            Added _nx_ppp_debug_log_capture_protocol prototype.
+                                                            Modified the NX_PPP data block to contain a secondary DNS address and count of retries on IPCP
+                                                              config requests with DNS address options.             
+                                                            Added #defines for maximum retries on IPCP requests containing DNS options.
+                                                            Added services for setting and getting the primary and secondary DNS addresses.
+                                                            Added NXE function for error checking.
+                                                            Fixed the compiler error if defined NX_PPP_DISABLE_INFO.   
+
+            demo_netxduo_smtp_client.c                      Unified ticks per second.
+                                                            Fixed compiler warnings.
+            nxd_smtp_client.c                               Unified ticks per second.
+                                                            Removed unused code and simplified SMTP client data types
+                                                            Fixed packet leaks in various functions
+                                                            Added logic for SMTP servers not configured for authentication
+                                                            Added option for SMTP Client to skip authentication (NX_SMTP_CLIENT_AUTH_NONE)
+                                                            Fixed problems handling multi-packet response from the server to client EHLO
+                                                            Check socket state and delete TCP socket in nx_smtp_client_delete() before clearing SMTP Client memory
+                                                            Modified _nx_smtp_utility_parse_server_services() not to set AUTH type if the current 250 packet does not
+                                                               contain the AUTH keyword. Otherwise the client authentication type may not be set correctly.
+                                                            Fixed compiler warnings.
+            nxd_smtp_client.h                               Unified ticks per second. Remove definitions of NX_SMTP_MILLISECONDS_PER_TICK and NX_SMTP_TICKS_PER_SECOND.
+                                                            Added logic for SMTP servers not configured for authentication
+                                                            Added option for SMTP Client to skip authentication (NX_SMTP_CLIENT_AUTH_NONE)
+                                                            Removed unused code and simplified SMTP client data types        
+
+            demo_netxduo_mib2.c                             Unified ticks per second.
+                                                            Fixed compiler warnings.
+            demo_netxduo_snmp.c                             Unified ticks per second.
+                                                            Fixed compiler warnings.
+                                                            Replace #ifdef ENABLE_V3 with #ifndef NX_SNMP_DISABLE_V3 to eliminate compile errors
+                                                              if NX_SNMP_DISABLE_V3 is defined in SNMP.
+            demo_snmp_helper.h                              Fixed compiler warnings.
+            nxd_snmp.c                                      Modified nx_snmp_version3_report_send() :
+                                                                1) never encrypt data in a report response
+                                                                2) never to set encryption or reportable bit in security header flags field,
+                                                                3) if sending time synchronization report, only use authentication even if encryption is enabled,
+                                                                4) never send boot data in response to a discovery request.
+                                                            Modified nx_snmp_version3_process() :
+                                                                1) Flags in the security header should never have reportable bit sent
+                                                                2) never send boot data if authentication is not enabled.
+                                                            Modified nx_snmp_version3_process where it sets the request_type_ptr
+                                                                for returning the request packet with an error status.
+                                                            Renamed _nx_snmp_utility_request_type_set_A5 to _nx_snmp_utility_request_type_set_multibyte
+                                                            Removed _nx_snmp_utility_request_type_set (use only _nx_snmp_utility_request_type_set_1byte)
+                                                            Modified nx_snmp_send_error_response() and nx_snmp_encrypt_pdu for handling SNMPV3 request packet PDUs
+                                                                for error messages when security is enabled.
+                                                            Replaced 1 byte data size fields with 2 byte data size fields in sequence headers in trap send,
+                                                                and SNMP message process functions, wherever there is a possibility the data may exceed 128 bytes
+                                                                (and thus require 2 bytes).
+                                                            Modified logic in data object get functions to determine the size of the data size field rather than
+                                                                assume 2 bytes (e.g. _nx_snmp_utility_community_get, _nx_snmp_utility_object_id_get,
+                                                                _nx_snmp_utility_object_data_get).
+                                                            Fixed a bug in _nx_snmp_agent_encrypt_pdu for not adjusting encrypted PDU length for non-zero padding.
+                                                            Added a null pointer check for the object list pointer in the trap functions when going through
+                                                                the PDU object list items.
+                                                            Added NX_SNMP_V3_DISABLE conditional compile directives around global PDU processing variables and in
+                                                                _nx_snmp_version_error_response relevant for V3 security specific processing.
+                                                            Fixed compiler warnings.
+                                                            Minor correction masking the length variable.
+            nxd_snmp.h                                      Renamed _nx_snmp_utility_request_type_set_A5 to _nx_snmp_utility_request_type_set_multibyte.
+                                                            Removed _nx_snmp_utility_request_type_set (use only _nx_snmp_utility_request_type_set_1byte).
+                                                            Changed the order of internal functions for more logical grouping.
+                                                            Unified ticks per second.
+                                                            Added #ifdef NX_SNMP_V3_DISABLE checks around #includes for authentication
+                                                                and encryption key processing, and around API fucntions that compute and activate keys.
+                                                            Removed unused extern nx_system_ticks_per_second.            
+
+            demo_netxduo_sntp_client.c                      Unified ticks per second.
+                                                            Updated the demo for creating SNTP client packet pool.
+                                                            Fixed compiler warnings.
+            nxd_sntp_client.c                               Modified nx_sntp_client_get_msecs_diff to simplify the logic
+                                                            Modified nx_sntp_client_server_clock_dispersion_check to simplify the logic
+                                                            Reworked the logic in nx_sntp_client_utility_get_msec_diff to add back in flag for postive or 
+                                                              negative difference. Some use cases in NetX SNTP Client regard a negative difference as an error. 
+                                                            Modified nx_sntp_client_utility_convert_secs_to_date to handle a date stamp in a year 
+                                                              after NX_SNTP_CURRENT_YEAR.
+                                                            Created new API  _nx_sntp_client_request_unicast_time to request unicast updates asynchronously of the
+                                                              SNTP Client thread task. 
+                                                            Simplified the completion status logic for _nx_sntp_client_process_update_packet
+                                                            Removed unnecessary input for _nx_sntp_client_receive_time_update and _nx_sntp_client_apply_sanity_checks, 
+                                                            Fixed the logic to check if the update time has expired without a response. 
+                                                            Modified nx_sntp_client_initialize_broadcast to handle invalid parameter input. 
+                                                            Created nx_sntp_client_set_time_update_notify to set a callback when the SNTP Client receives a valid 
+                                                              SNTP update. 
+                                                            Simplified logic for valid packet processing in _nx_sntp_client_process_broadcast.
+                                                            Simplified error code in _nx_sntp_client_apply_sanity_checks.
+                                                            Modifiied _nx_sntp_client_process_time_data to add status check for adding msec to ntp time.
+                                                            Unified ticks per second.
+                                                            Fixed a bug when multiple packets were received and the first one was invalid,
+                                                              other packets were not processed in time.
+                                                            Fixed compiler warnings.
+            nxd_sntp_client.h                               Modified nx_sntp_client_server_clock_dispersion_check declaration for changes to input args
+                                                            Created new API  nx_sntp_client_request_unicast_time()
+                                                            Removed unnecessary input for _nx_sntp_client_receive_time_update and _nx_sntp_client_apply_sanity_checks, 
+                                                            Added support for nx_sntp_client_set_time_update_notify() callback.
+                                                            Unified ticks per second.
+                                                            Removed unused macros. 
+                                                            Fixed compiler warnings.        
+
+            demo_netxduo_telnet.c                           Unified ticks per second.
+                                                            Fixed compiler warnings.            
+            nxd_telnet_server.c                             Added support for external packet pool creation for use when NX_TELNET_SERVER_OPTION_DISABLE
+                                                              is not defined and the Telnet Server needs a packet pool to send Telnet options. 
+                                                            Created _nx_telnet_server_packet_pool_set() API for applications to set the Telnet Server packet
+                                                              pool if NX_TELNET_SERVER_USER_CREATE_PACKET_POOL is defined.  The default is the Telnet Server
+                                                              creates the packet pool.
+                                                            Cleared socket resource when telnet server is stopped.                  
+                                                            Modified nx_telnet_server_process_options to move the offset for all responses to the ECHO request.
+                                                            Fixed a bug when packet contains command and data, data are not processed.
+                                                            Fixed compiler warnings.                                          
+            nxd_telnet_server.h                             Added support for for external packet pool creation with configuration option 
+                                                              NX_TELNET_SERVER_USER_CREATE_PACKET_POOL and API nx_telnet_server_packet_pool_set().                                                   
+                                                            Unified ticks per second.
+                                                            Added event to stop telnet server.
+            nxd_telnet_client.h                             Removed unused macro.   
+
+            demo_netxduo_tftp.c                             Unified ticks per second.
+                                                            Fixed compiler warnings.
+            nxd_tftp_server.c                               Added support for a retransmit feature where a packet is
+                                                             retransmitted if the correct data or ACK from the TFTP Client
+                                                             is not received within user specified timeout period.
+                                                            Added logic to handle duplicate WRITE or READ requests e.g. the 
+                                                            TFTP server is delayed responding to the first request and while
+                                                              processing it receives one or more duplicate requests (which are dropped).
+                                                            Fixed packet leak.
+                                                            Fixed compiler warnings.
+            nxd_tftp_server.h                               Added support for a retransmit feature.
+            nxd_tftp_client.c                               Fixed compiler warnings.            
+
+                                                             
+Release 5.8   01-12-2015
+
+            nx_auto_ip.c                                    Added NX_RAND to replace rand to get the random value.
+
+            nxd_bsd.c                                       Added API functions:
+                                                              inet_pton - This function converts an IP address from presentation to numeric.
+                                                              inet_ntop - This function converts an IP address from numeric to presentation.
+                                                              getaddrinfo - This function returns one or more addrinfo structures according
+                                                                            to the specified node and service.
+                                                              freeaddrinfo - This function releases the memory allocated by getaddrinfo.
+                                                              getnameinfo - This function converts a socket address to a corresponding host and service.
+                                                            Modified API functions:
+                                                              socket - Improved UDP and raw socket performance. 
+                                                              connect - Fixed error status when connection fails in blocking mode.
+                                                              bind   - Fixed a bug in local bound port, improved UDP socket performance. 
+                                                              accept - Cleared the INPROGRESS flag when connection is established.
+                                                              getsockname - Fixed port value for UDP socket.
+                                                              recv   - Fixed how socket timeout is handled.  Socket doing blocked receive
+                                                                       with timeout value would not wake up if there are other BSD sockets
+                                                                       receiving data. Fixed return code. Supported flags MSG_PEEK and MSG_DONTWAIT.
+                                                              recvfrom - Supported flags MSG_PEEK and MSG_DONTWAIT.
+                                                              select - Fixed fd_set value when socket is not in use.
+                                                                       Removed an obsolete for loop clearing blocked sockets for new connection requests.
+                                                              send - Supported raw PPPOE. Supported flags MSG_DONTWAIT.
+                                                              sendto - Supported raw PPPOE. Supported flags MSG_DONTWAIT.
+                                                              soc_close - Improved UDP and raw socket performance.
+                                                                          Added support for NX_BSD_TCP_SOCKET_DISCONNECT_TIMEOUT in the nx_tcp_socket_disconnect call.
+                                                                          Fixed a bug that secondary socket was not disconnected. 
+                                                              ioctl  - Added logic for applications to clear the non-blocking flag.
+                                                                       Modified FIONREAD option to capture the correct number of bytes received on the UDP socket
+                                                              inet_ntoa  - Move logic to internal function inet_ntoa_internal.
+                                                              inet_aton - Added an error return if an invalid character is received
+                                                                          for base-16 address buffer. Fixed a bug of processing hex number.
+                                                              FD_SET - Fixed FD_SETSIZE check
+                                                              FD_CLR - Fixed FD_SETSIZE check
+                                                              FD_ISSET - Fixed FD_SETSIZE check
+                                                              FD_ZERO  - Fixed FD_SETSIZE value
+                                                            Added internal functions:
+                                                              nx_bsd_pppoe_internal_sendto - This function sends raw PPPOE packet to driver directly.
+                                                              _nx_bsd_pppoe_packet_received - This function receives raw PPPOE packet from driver directly.
+                                                              inet_ntoa_internal - This function converts an IPv4 address to a string and 
+                                                                                   returns the size of the string.
+                                                              bsd_string_to_number - This function converts string to number.
+                                                              nx_bsd_set_service_list - This function lets user set the service list used by getaddrinfo.
+                                                              _nx_bsd_string_length - This function returns the length of string.
+                                                            Modified internal functions:
+                                                              bsd_initialize - Supported getaddrinfo and getnameinfo APIs.
+                                                              nx_bsd_timeout_process - Corrected the logic and comment to skip client sockets.
+                                                              nx_bsd_send_internal - Remove unnecessary code. Supported flags MSG_DONTWAIT.
+                                                              bsd_number_convert - Added support for HEX number. Added argument to avoid overflow. 
+                                                              nx_bsd_raw_socket_filter - Improved the raw socket search logic.
+                                                              nx_bsd_tcp_create_listen_socket - Fixed a bug to allow accept from remote end.
+                                                              nx_packet_data_extract_offset - Fixed a bug when offset and length of packet are both zero.
+                                                              nx_bsd_udp_packet_received - Improved the UDP socket search logic
+                                                              nx_bsd_tcp_syn_received_notify - Fixed connection status
+                                                              _nxd_bsd_ipv4_packet_send - Encapsulated all IGMP-related infomation.
+                                                            Removed internal functions: nx_bsd_isascii
+            nxd_bsd.h                                       Fixed FD_SETSIZE, added PPPOE and DNS support,
+                                                              added inet_pton, inet_ntop, getnameinfo, getaddrinfo, freeaddrinfo services,
+                                                              supported flags MSG_PEEK.
+                                                              New configuration option for TCP socket disconnect, NX_BSD_TCP_SOCKET_DISCONNECT_TIMEOUT.
+                                                              The default value is 1 (timer tick) 
+                                                              
+            nxd_dhcp_client.c                               Removed MULTI_HOME_NETXDUO/MULTI_HOME_NETX macro definition.
+                                                            Fixed a bug in nx_dhcp_search_buffer() that could potentially casue buffer overflow
+                                                            Fixed a packet leak in nx_dhcp_process() in the REQUEST state. 
+                                                            Replaced rand() with NetX Duo macro NX_RAND
+                                                            Updated nx_dhcp_process and nx_dhcp_send_request_internal for updating the 'secs' field 
+                                                                in the DHCP client header for those DHCP servers that expect this field to be updated. 
+                                                            Fixed a bug in nx_dhcp_add_randomize that could potentially cause a huge random delay factor
+                                                            Added nx_dhcp_clear_broadcast_flag service for cases where the DHCP server is behind
+                                                                a router and the server must be able to send unicast messages.
+                                                            Added nx_dhcp_seconds to the DHCP Client structure for filling in the 'secs' field in 
+                                                                the DHCP header.
+                                                            Modified calls for allocating packets so that NetX Duo DHCP CLient will also compile and run
+                                                                in a NetX environment.                                                                 
+                                                            Modified nx_dhcp_process for DHCP CLient to update the IP router and IP address from ACKs received
+                                                                from the server in the RENEW and REBIND state. 
+                                                            Modified the clear gateway address call function to match NetX Duo 5.8 
+                                                            Remove the nx_packet_data_extract_offset function since nx_packet_data_extract_offset function
+                                                                is defined in NetX/NetXDuo 5.8
+                                                            Fixed the bug of DHCPv4 Client option added operation: added Server identifier option in DHCP Decline and Release messages, 
+                                                                removed Host name option in DHCP Decline and Release messages.
+                                                            Remove the internal function from nxd_dhcp_client.h into nxd_dhcp_client.c.
+                                                            _nx_dhcp_client_send_arp_probe modified to check if an arp entry with matching IP address 
+                                                            does not have a non-zero MAC address.
+                                                            Modified the logic to get DHCP option value to avoid using the released packet in _nx_dhcp_user_option_retrieve.
+                                                            Processed the DNS and NTP server options in _nx_dhcp_extract_information.
+
+            nxd_dhcp_client.h                               Modified definition of NX_DHCP_PACKET_PAYLOAD so that NetX Duo DHCP CLient will also compile and run
+                                                              in a NetX environment.                                                                  
+                                                            Added nx_dhcp_seconds to the DHCP CLIENT struct.
+                                                            Added nx_dhcp_clear_broadcast_flag service for cases where the DHCP server is behind
+                                                              a router and the server must be able to send unicast messages.
+                                                            Added variables to store DNS and NTP server addresses.
+            nxd_dhcp_server.c                               Modified the process of DHCP Server response message, set the correct destination address 
+                                                            and destination port according to the 'giaddr', 'ciaddr' and broadcast bit. 
+                                                            Modified the logic in nx_dhcp_server_validate_client_message to delay
+                                                            NACKs to finish checking for invalid data which requires the Server
+                                                            to respond silently.
+                                                            Added logic in nx_dhcp_listen_for_messages to check for invalid DHCP packet length
+                                                            being less than NX_DHCP_HEADER_SIZE.                                    
+                                                            Removed the MULTI_HOME_NETXDUO macro definition.
+                                                            Fixed a bug of DHCPv4 Server option added operation
+                                                            Removed the internal function from nxd_dhcp_server.h into nxd_dhcp_server.c.
+                                                            Used API to get the interface instead of directly getting the internal parameters.
+                                                            Corrected memset in nx_dhcp_server_create_ip_list() for the size input arguement.
+            nxd_dhcp_server.h                               Created a new error status for malformed packets (0xA4).  Added a new define for
+                                                            DHCP header size (no option bytes)  NX_DHCP_HEADER_SIZE.                                                             
+                                                            Removed the MULTI_HOME_NETXDUO macro definition. 
+                                                            Removed useless function declaration (nx_dhcp_create_server_ip_address_list_text).
+            nxd_dhcpv6_client.c                             Created nx_dhcpv6_get_valid_ip_address_prefix service for obtaining the prefix of 
+                                                            addresses assigned by DHCPv6 servers.
+                                                            Modified nx_dhcpv6_thread_entry to automatically restart the SOLICIT messages if the DHCPv6 Client
+                                                            IPv6 address expires. Previously it put the DHCPv6 Client in the INIT state, requiring the DHCPv6
+                                                            Client app to manually restart the SOLICIT messages.                                               
+                                                            Created nx_dhcpv6_get_time_server_address service for obtaining the time server address assigned by DHCPv6 Servers.
+                                                            Added support for the FQDN option to the DHCPv6 Client, with new API nx_dhcpv6_request_option_FQDN
+                                                            Fixed the bug for NoAddrsAvail status in nx_dhcpv6_process()
+                                                            Modified the nx_dhcpv6_server_error_handler function; the message type should be the type of received message 
+                                                            and defined status codes to reflect the error (see nxd_dhcpv6_client.h). 
+                                                            Modified the nx_dhcpv6_resume function to support for DHCPv6 state restore feature.
+                                                            Added nx_dhcpv6_client_get_record and nx_dhcpv6_client_restore_record functions to realize the DHCPv6 Client restore feature.
+                                                            Added _nx_dhcpv6_flush_queue_packets function to flush the useless queue packets 
+                                                            Loop to receive the queue packets until get the valid answer or timeout.                                                  
+            nxd_dhcpv6_client.h                             Added support for the FQDN option, including defining FQDN settings and creating a new NX_DHCPV6_CLIENT_FQDN struct
+                                                            Added declaration of nx_dhcpv6_get_valid_ip_address_prefix service API service.
+                                                            Added declaration of nx_dhcpv6_get_time_server_address service API service.
+                                                            Added nx_dhcp_seconds to the DHCP CLIENT struct.                                                            
+                                                            Defined error status codes for server error handler op codes; NX_DHCPV6_ERROR_STATUS_CODE_IN_OPTION_FIELD,  
+                                                            NX_DHCPV6_ERROR_STATUS_CODE_IN_IA_NA, and NX_DHCPV6_ERROR_STATUS_CODE_IN_IA_ADDRESS.
+                                                            Added nx_dhcpv6_client_get_record and nx_dhcpv6_client_restore_record functions to realize the DHCPv6 Client restore feature.
+                                                            Added _nx_dhcpv6_flush_queue_packets function to flush the useless queue packets.
+                                                            Optimized DHCPv6 struct, removed nx_dhcpv6_valid_advertise_or_reply_flag.
+            nxd_dhcpv6_server.c                             Fixed the compiler warnings     
+                                                            Removed MULTI_HOME macro definition.
+                                                            Used NetX Duo API to get the interface instead of directly getting the internal parameters.
+                                                            Fixed the bug for physical address check.
+                                                            
+            nxd_dns.c                                       Added two new services, nx_dns_server_remove_all() which removes all DNS servers 
+                                                            registered with the DNS Client, and nx_dns_info_by_name_get() which gets the
+                                                            Service record associated with the specified host name.  These services sere
+                                                            previously only available in NetX DNS Client. 
+                                                            Fixed a bug in nxd_dns_response_process() that return error code if the packet 
+                                                            does not contain the RR the application expects.
+                                                            Fixed a bug in nx_dns_name_string_unencode() that return error code if the buffer
+                                                            size can not store the all name string. 
+                                                            Change the internal nxd_* function and nxd_* variables to nx_* function and nx_* variables.                                               
+                                                            Added DNS CACHE feature.    
+            nxd_dns.h                                       Added two new services, nx_dns_server_remove_all() and nx_dns_info_by_name_get().
+                                                            Added DNS CACHE feature.           
+
+            nxd_ftp_client.c                                Added _nx_ftp_client_connect_internal function and modified the _nxd_ftp_client_connect function.                                                    
+                                                            Added '|' character as the delimiter type for EPRT. 
+            nxd_ftp_client.h                                Added declaration for _nx_ftp_client_connect_internal function. 
+            nxd_ftp_server.c                                Added support for packet chain                                       
+                                                            Fixed complier warning
+                                                            Added _nx_ftp_server_create_internal function and modified the _nx_ftp_server_create function. 
+            nxd_ftp_server.h                                Added declaration for _nx_ftp_server_create_internal function.      
+
+            nxd_http_client.c                               Fixed a bug that username and password might be NULL.
+                                                            Added size check for nxe_http_client_create.
+            nxd_http_client.h                               Added size check for nxe_http_client_create.
+            nxd_http_server.c                               Fixed the logic in _nx_http_server_get_client_request to handle 
+                                                            multipacket Get requests.                            
+                                                            Added cache feature.
+                                                            Supported user defined MIME maps.
+                                                            Supported packet chain feature.
+                                                            Supported multipart upload feature.
+                                                            Unified response line.
+                                                            Fixed compiler warnings.
+                                                            Fixed memory leak when packet is chained.
+                                                            Supported escape character.
+                                                            Supported absolute URI.
+                                                            Added separate input pointer to authenticate function if authentication is required. 
+                                                            Return on internal error code.
+                                                            Added size check for nxe_http_server_create.
+                                                            Added timeouts for receive, accept, send and disconnect.
+                                                            Defined values and structures for new features in nxd_http_server.c.
+                                                            Added new services for new features in nxd_http_server.c.
+                                                            Supported invalid user/password callback function.
+            nxd_http_server.h                               Supported multipart upload feature.
+                                                            Unified response line.
+                                                            Supported to response date in header.
+                                                            Removed declarations for _nxe version.
+                                                            Added cache feature.
+                                                            Supported user defined MIME maps.
+                                                            Added new services for new features in nxd_http_server.c.
+                                                            Added size check for nxe_http_server_create.
+                                                            Added timeouts for receive, accept, send and disconnect.
+                                                            Modified NX_HTTP_MAX_STRING to ensure room for encoded string. 
+
+            nx_ppp.c                                        Modified logic in nx_ppp_packet_receive_get() to ensure that multipacket PPP messages cleave off
+                                                            packets with junk data from the datagram (e.g. ppp crc computation and the 0x7e marker).
+                                                            Modified logic in nx_ppp_lcp_configure_request() and nx_ppp_lcp_terminate_request_sent() to 
+                                                            remove logic decementing the nx_ppp_protocol_retry_counter.  The logic is that the counter is
+                                                            incremented up to NX_PPP_MAX_LCP_PROTOCOL_RETRIES, not down to zero. By decrementing the counter
+                                                            effectively there was no limit to the retries in the LCP stage.
+                                                            Removed unnecessary NX_PPP_IPCP_CONFIGURE_REQUEST case in the NX_PPP_IPCP_PEER_CONFIGURE_REQUEST_ACKED state
+                                                            Added support for DNS request option configuration option.
+                                                            Added support for LCP echo, both responding to echo requests and sending ping requests with the new service
+                                                              nx_ppp_ping_request.                                                              
+                                                            Modified the _nx_ppp_hash_generator, and all callers of this function to include a length arguement,
+                                                            rather than assume the rand_value is null terminated (0x0 is a valid random octet).
+                                                            Modified nx_ppp_delete to terminate the PPP thread before deleting it.                                                           
+                                                            Fixed nx_ppp_pap_authenticate_nak not to set the PPP authenticated status to TRUE. 
+                                                            Fixed nx_ppp_pap_login to only return TRUE or FALSE, not status, so that mismatched user/passwords will be detected.
+                                                            Corrected the logic in nx_ppp_thread_entry() determining if the PPP should be set to authenticated.
+                                                            Modified  _nx_ppp_lcp_state_machine_update() to accept LCP requests if already in the completed state (WIP).
+                                                            Corrected logic in  _nx_ppp_pap_state_machine_update() setting the PPP PAP state if PAP authentication fails.       
+            nx_ppp.h                                        Added DNS request option configuration option to disable the DNS request in IPCP messages.
+                                                            Added support for LCP echo, both responding to echo requests and sending ping requests with the new service
+                                                              nx_ppp_ping_request. 
+                                                            Modified the _nx_ppp_hash_generator to include a length arguement,
+                                                            rather than assume the rand_value is null terminated (0x0 is a valid random octet).   
+
+            nxd_smtp_client.c                               Fixed error in invalid pointer check in _nxe_smtp_mail_send.
+                                                            Fixed compiler error when IPv6 is disabled in _nxd_smtp_client_create.
+                                                            Fixed bug checking for invalid pointers.
+                                                            Fixed a typo in _nx_smtp_cmd_message.
+                                                            Fixed case insensitive compare for challenge word.
+                                                            Corrected 5.2 release date from 04-15-13 to 04-15-2013
+            nxd_smtp_client.h                               Corrected 5.2 release date from 04-15-13 to 04-15-2013        
+
+            nxd_snmp.c                                      Renamed API to be consistent with Express Logic names:
+                                                              nx_snmp_agent_get_current_version to nx_snmp_agent_current_version_get
+                                                              nx_snmp_agent_set_current_version to nx_snmp_agent_current_version_set
+                                                              nx_snmp_agent_set_private_string to nx_snmp_agent_private_string_set
+                                                              nx_snmp_agent_set_public_string to nx_snmp_agent_public_string_set
+                                                              nx_snmp_agent_received_private_string to nx_snmp_agent_private_string_test
+                                                            Simplified the logic in _nx_snmp_agent_private_string_test.
+                                                            Used zero as terminal of string in _nx_snmp_agent_private_string_set
+                                                              and _nx_snmp_agent_public_string_set.
+                                                            Created nx_snmp_agent_public_string_set to set the SNMP Agent public string.
+                                                            Created nx_snmp_agent_get_type_test to determine if an SNMP message received
+                                                              is a GET or SET type.
+                                                            Modified nx_snmp_version_1_process, nx_snmp_version_2_process and nx_snmp_version_3_process
+                                                              to support the nx_snmp_agent_get_type_test service (save the request
+                                                              type of the current received message).
+                                                            Created nxd_snmp_agent_trapv2_oid_send and nxd_snmp_agent_trapv3_oid_send services.
+            nxd_snmp.h                                      Renamed API to be consistent with Express Logic names:
+                                                              nx_snmp_agent_get_current_version to nx_snmp_agent_current_version_get
+                                                              nx_snmp_agent_set_version to nx_snmp_agent_version_set
+                                                              nx_snmp_agent_set_private_string to nx_snmp_agent_private_string_set
+                                                              nx_snmp_agent_set_public_string to nx_snmp_agent_public_string_set
+                                                              nx_snmp_agent_received_private_string to nx_snmp_agent_private_string_test
+                                                            Added new API nx_snmp_agent_public_string_set and nx_snmp_agent_request_get_type_test
+                                                            Created nxd_snmp_agent_trapv2_oid_send and nxd_snmp_agent_trapv3_oid_send services.  
+
+            nxd_sntp_client.c                               Fixed a bug in setting flags of request packet.
+                                                            Fixed a compiler error when IPv6 is disabled.
+                                                            Fixed compiler warnings.
+                                                            Fixed a bug that dispersion check is disabled, the return
+                                                              status should be success.
+            nxd_sntp_client.h                               Fixed default value for packet size.
+                                                            Fixed predefined value of current year and NTP time at 1999-01-01. 
+
+            nxd_telnet_server.c                             Added support for option negotiation. The supported options are "ECHO" and "Suppress Go Ahead". 
+                                                            Fixed a bug that connection end callback function was not invoked.
+                                                            Added logic to handle a RST where the socket is already closed.
+                                                            Added a callback to set remote echo (used by the NetX Duo SHELL Telnet driver).
+            nxd_telnet_server.h                             Added support for option negotiation. The supported options are "ECHO" and "Suppress Go Ahead".  
+
+            nxd_tftp_server.c                               Remove the MULTI_HOME macro definition. 
+                                                            Added support for packet chaining.
+            nxd_tftp_server.h                               Remove the MULTI_HOME macro definition.           
+            nxd_tftp_client.c                               Fixed packet leaks in nx_tftp_client_file_read and nx_tftp_client_file_open.
+                                                            Remove the MULTI_HOME macro definition.                                                   
+                                                            Modified nx_tftp_client_file_write and nx_tftp_client_file_open (write request) to save server
+                                                              error type and message to TFTP Client if an ACK is not received after data is sent.                                                   
+                                                            Modified nx_tftp_client_file_read to fix bug parsing the server error type from the server 
+                                                              if an error code is received.             
+
+
+Release 5.4   11-23-2009
+
+            nxd_dhcp_client.c                               Added logic to clear non specific DHCP broadcast packets from the DHCP Client
+                                                            receive queue in nx_dhcp_thread_entry() and nx_dhcp_get_response(). This is enabled by
+                                                            defining the NX_DHCP_CLIENT_CLEAR_QUEUE option in nx_dhcp.h. 
+                                                            Made corrections to nx_dhcp_process for more accurate handling of retransmission
+                                                            intervals in both the process of reaching the BOUND state and in the RENEW and REBIND
+                                                            states.
+                                                            Simplified the logic for extracting network parameters from the Server DHCP messages
+                                                            between nx_dhcp_extract_information and nx_dhcp_process, in particular if the 
+                                                            ARP probe is enabled. This also fixed a bug with using nx_dhcp_send_arp_probe of 
+                                                            calling the state change notify function before the probe completed and the DHCP Client
+                                                            properly promoted to the BOUND state. 
+                                                            Simplified the logic in nx_dhcp_start and nx_dhcp_request_client_ip for setting the DHCP 
+                                                            Client state with respect to the Client requesting a particular IP address.         
+                                                            Modified nx_dhcp_get_response() to prevent invalid packet releases.
+                                                            Removed the requirement for having the DHCP CLient to have a non zero interface IP address for using 
+                                                            the option to skip the discovery step.                                                             
+                                                            Modified nx_dhcp_process, nx_dhcp_release, nx_dhcp_decline and nx_dhcp_reinitialize to clear the DHCP
+                                                            Client copy of network parameters (e.g. network mask, gateway) if the DHCP Client is clearing the 
+                                                            interface IP address and gateway.
+                                                            Made a correction to nx_dhcp_send_response_internal to always send DISCOVERY messages
+                                                            as broadcast packets as per the RFC 2131.
+                                                            Made a correction to nx_dhcp_send_response_internal to always send REQUEST messages
+                                                            as broadcast packets if the DHCP Client is in the REBIND or REQUESTING state as per the RFC 2131.
+                                                            Made corrections for creating and sending the INFORM_REQUEST message.                                                  
+                                                            Created nx_dhcp_decline() to send DECLINE messages
+                                                            Modified nx_dhcp_send_request() to disallow RELEASE and DECLINE messages.
+                                                            Removed logic in nx_dhcp_client_arp_probe_send() setting IP network parameters.  Modified to only 
+                                                            return status if the IP address is not in use.  
+                                                            Modified nx_dhcp_release to set the start flag to false which is required to be able to restart the client with nx_dhcp_start().  
+                                                            Modified nx_dhcp_delete() to unbind the socket before deleting. 
+                                                            Modified nx_dhcp_delete() and nx_dhcp_create() to delete the DHCP Client packet pool only if the DHCP 
+                                                            Client task created it. 
+                                                            Modified nx_dhcp_option_retrieve() for an error in parsing the option buffer. 
+                                                            Modified nx_dhcp_process() to sleep for the NX_DHCP_TIME_INTERVAL only if the 
+                                                            DHCP client is at or beyond the bound state.
+                                                            Modified nx_dhcp_process() to set the IP network address to zero if the ARP probe 
+                                                            fails. This ensures the DHCP Client sends the subsequent DHCP messages out as broadcast
+                                                            (not unicast).  
+                                                            Modified nx_dhcp_process() to adjust the DHCP Client time remaining on its IP lease for 
+                                                            the length of time of the ARP probe.
+            nxd_dhcp_client.h                               Added nx_dhcp_decline to the list of DHCP Client API services
+                                                            Modified nx_dhcp_client_arp_probe_send definition
+                                                            Added internal flags to the DHCP CLient struct to simplify internal logic of the DHCP
+                                                            Client processing messages from the Server.
+            nxd_dhcp_server.c                               Replaced an array of CHAR pointers with a single CHAR array for the DHCP 
+                                                            Server dhcp_name field.  Modified nx_dhcp_server_create() to copy the input 
+                                                            name to the server dhcp_name field.
+
+
+Release 5.3   08-03-2009
+            nxd_bsd.c                                       nx_bsd_raw_filter_set - sets a function pointer to the BSD function that filters packets when raw
+                                                               sockets are enabled in NetX Duo and NX_RAW_PACKET_FILTER_ENABLE is defined at NetX Duo
+                                                               library build time.  Note that if there are multiple BSD raw sockets using the same protocol,
+                                                               the behavior in NetX Duo is undefined. BSD sockets should copy received packets to all raw sockets
+                                                               having the same protocol, but this is not implemented in BSD 5.3
+                                                            nx_bsd_packet_receive- Retrieves packets enqueued on the BSD raw socket queue.
+                                                            nx_bsd_raw_packet_info_extract - Extracts the raw packet sender and physical interface. 
+                                                            nx_bsd_raw_receive_notify - This is the callback function NetX Duo uses when a raw packet has been received
+                                                               and raw sockets are enabled in NetX Duo.                          
+                                                            nx_bsd_raw_packet_filter - receives packets from NetX Duo if raw sockets are enabled and determines if 
+                                                               BSD will consume the packet or let NetX Duo continue processing the packet e.g. hand off to TCP,
+                                                               UDP, ICMP and other protocol handlers.
+                                                            Modified functions
+                                                               sendto - modified to send raw packets out the BSD socket if raw sockets are enabled.
+                                                               recv - modified to receive raw packets if raw sockets enabled in NetX Duo
+                                                               select - modified to receive raw packets if raw sockets enabled in NetX Duo
+                                                               connect - modified to check for and disallow raw sockets to use this service 
+                                                               send - modified to check for and disallow raw sockets to use this service
+                                                               soc_close - modified for closing BSD sockets enabled for raw socket handling, including 
+                                                                        manully clearing packet from the raw receive queue     
+            nxd_bsd.h                                       Added the NX_BSD_PRINT_ERROR macro definition (disbaled by default0 for debug output
+        
+            nxd_dhcp_client.c                               Added  _nx_dhcp_server_address_get, for obtaining the DHCP server address and
+                                                              _nx_dhcp_packet_pool_set to allow the host application to create the packet pool instead
+                                                              of the default DHCP Client packet pool.  
+                                                            Added critical section and mutex protection to the DHCPv6 Client                                                    
+                                                            Modified nx_dhcp_get_response to add missing nx_packet_release calls to prevent packet leaks.
+            nxd_dhcp_client.h                               Corrected the definition for NX_PACKET_ALLOCATE_TIMEOUT
+                                                            Created a configuration option NX_DHCP_CLIENT_USER_CREATE_PACKET_POOL for the new feature for the 
+                                                              host application to optionally create the DHCP Client packet pool  
+            nxd_dhcp_server.c                               Renamed internal functions, error constants and definitions to avoid conflicts with the 
+                                                            DHCP client.
+            nxd_dhcp_server.h                               Renamed internal functions, error constants and definitions to avoid conflicts with the 
+                                                            DHCP client.           
+            nxd_dhcpv6_client.c                             Modified the DHCPv6 Client thread task to be stoppable at any time
+                                                            Added nx_dhcpv6_stop and nx_dhcpv6_reinitialize for stopping and restarting the Client
+                                                            Added nx_dhcpv6_register_IP_address for updating NetX Duo with the DHCPv6 Client assigned IP address
+                                                            Modified DHCPv6 Client to remove IP address from the IP instance address table if an IP address is not reassigned
+                                                            for example if rebind fails or host decides to release or decline an assigned address                                                    
+                                                            Added critical section and mutex protection to the DHCPv6 Client
+            nxd_dhcpv6_client.h                             Corrected the timer interval for the accrued lifetime entry function to use seconds, not ticks
+                                                            Created a BOUND state and removed the FAILURE state (not useful); the BOUND state is a drop through
+                                                            state in the DHCPv6 Client processing thread (does nothing)                                                            
+
+
+Release 5.2   12-30-2007
+
+            nx_auto_ip.c                                    Fixed a bug causing an infinate loop
+                                                            Added support for NetX Duo (5.5 and later) to run over IPv4 when IPv6 is enabled.
+            nx_auto_ip.h                                    Added support for NetX Duo (5.5 and later) to run over IPv4 when IPv6 is enabled.
+            
+            nxd_bsd.c                                       Fixed compile error caused by NX_BSD_ADDRESS_FAMILY_ERROR and NX_BSD_ERROR(NX_BSD_ERROR, __LINE__).
+            nxd_bsd.h                                       NX_BSD_INHERIT_LISTENER_SOCKET_SETTINGS corrected to be enabled by default 
+            
+            nxd_dhcp_client.c                               First release of NetX Duo DHCP Client (branched from NetX DHCP Client)                                                         
+                                                            Renamed the NetX Duo Client source code file from nx_dhpc.c to nxd_dhcp_client.c to specify the 
+                                                            DHCP Client and to indicate that the DHCP Client will work properly in an IPv6 enabled NetX Duo 
+                                                            environment.
+            nxd_dhcp_client.h                               Renamed the NetX Duo Client header file from nx_dhpc.h to nxd_dhcp_client.h
+            nxd_dhcp_server.c                               First release of NetX Duo DHCP Server (branched from NetX DHCP Server)  
+                                                            Renamed the NetX Duo Server source code file from nx_dhpc_server.c to nxd_dhcp_server.c to 
+                                                            indicate that the DHCP Server will work properly in an IPv6 enabled NetX Duo 
+                                                            environment. 
+            nxd_dhcp_server.h                               Renamed the NetX Duo Server header file from nx_dhpc_server.h to nxd_dhcp_server.h
+            nxd_dhcpv6_client.c                             Fixed compile errors in the NetX duo 5.6 environment.
+                                                            v5.1 patches:
+                                                            Modified nx_dhcpv6_start() for DHCPv6 client hosts rebooting with a valid IP lease already assigned.
+                                                            Modified nx_dhcpv6_client_create_duid() not to set the link local address. The host application must do this                                                            
+                                                            Added support for multihoming and NetX Duo v5.5 and later.
+            nxd_dhcpv6_client.h                             Fixed compile errors in the NetX duo 5.6 environment.
+            
+            nxd_ftp_client.c                                Moved data socket disconnect ahead of releasing the
+                                                            port and removing from the listen queue, flush server 
+                                                            FTP messages from previous open request before starting 
+                                                            the current open file request, added an unnaccept call 
+                                                            if the data socket accept call fails, disconnect data 
+                                                            socket if an error occurs on the control socket ending 
+                                                            the file open request, increment the data port in the 
+                                                            event the FTP server puts the data socket in a timed wait,
+                                                            fixed the source of the IPv6 address in the number to 
+                                                            ascii converstion routine, flush server FTP messages 
+                                                            from previous open request before starting the current
+                                                            open file request, added an unnaccept call if the data 
+                                                            socket accept call fails, disconnect data socket if an
+                                                            error occurs on the control socket ending the file open 
+                                                            request, increment the data port in the event the FTP 
+                                                            server puts the data socket in a timed wait.
+            nxd_ftp_client.h                                Added client data socket port to increment data port 
+                                                            binding on successive connections.
+            nxd_ftp_server.c                                Added a cast to the FTP server pointer, added a check for 
+                                                            whether or not IPv6 is enabled in NetX Duo.
+            nxd_ftp_server.h                                Added conditional IPv6 check for IPv6 specific 
+                                                            function declarations.
+                                                            
+            nxd_http_server.c                               Created _nx_http_server_content_length_get_extended and                            
+                                                              _nx_http_server_content_get_extended services which will accept 
+                                                              empty (content-length = 0) PUT and POST requests. 
+                                                            Corrected 411 error codes in HTTP server replies to 400 error codes
+                                                              since 411 error code is when the HTTP server refuses to accept a
+                                                              request without a defined content-length. HTTP 1.0 permits requests 
+                                                              without Content-length but does not permit Content-length that does 
+                                                              not match the message body. 
+                                                              
+            nx_ppp.c                                        Added logic in nx_ppp_ipcp_state_machine_update() to handle late configuration requests
+                                                            after the other side has completed the IPCP handshake. 
+                                                            Corrected the processing of the CHAP challenge 'name' in nx_ppp_chap_challenge_respond().
+                                                            Fixed a corner case if packet payload size falls on a certain boundary such that the 7E marker
+                                                            terminating PPP message overwrites the end of the packet payload boundary in nx_ppp_packet_receive_get(). 
+                                                            Also fixed an error in checksum computation for the same packet payloads of the same size. 
+                                                            Added packet chaining support                                                           
+                                                            Modified nx_ppp_receive_packet_process to only call link up callback if PPP has just transitioned to 
+                                                            IPCP complete state, not if it was already in that state. 
+                                                            
+            nxd_telnet_server.c                             Added support for activity timeout disconnect callback. When a connection times out
+                                                            NetX Duo Telnet Server calls the disconnect callback. Previously, it simply
+                                                            closed the connection silently.
+                                                            Added a current open connection counter and new API 
+                                                              nx_telnet_server_get_open_connection_count for retrieving the open conneciton count.
+            nxd_telnet_server.h                             Added support for the new API nx_telnet_server_get_open_connection_count
+            
+            
+Release 5.1   01-12-2012
+
+        
+            nxd_dhcpv6_server.c                             Modified the nx_dhcpv6_server_create function to include a stack size. Defaulted the 
+                                                            DHCPv6 server IP address index to 1 instead of requiring the host application to use 
+                                                            the nx_dhcpv6_server_set_interface (only necessary if using the non primary interface 
+                                                            or global address not at index 1 in the IP address table). 
+                                                            Renamed internal functions and #defines to avoid compile erros in projects including the DHCPv6 Client 
+            nxd_dhcpv6_server.h                             Renamed internal functions and #defines to avoid compile erros in projects including the DHCPv6 Client
+            
+            nxd_http_client.h                               Created a separate header file for HTTP Client and HTTP Server
+            nxd_http_server.h                               Created a separate header file for HTTP Client and HTTP Server 
+
+            nxd_snmp.c                                      Added support for packet chaining
+                                                            Moved nx_udp_socket_bind call from nx_snmp_agent_create to nx_snmp_agent_start
+                                                              moved nx_udp_socket_unbind in nx_snmp_agent_stop. This prevent packets from
+                                                              piling up on the receive queue before the SNMP agent thread can start processing them.
+                                                            Corrected how SNMPv3 packets are encrypted by adding an extra sequence between the top level
+                                                              PDU sequence and the engine ID. nx_snmp_version_3_process, nx_snmp_version_3_report_send
+                                                              and nx_snmp_agent_encrypt_pdu modified accordingly.
+                                                            Added trap security to provide authentication and encryption for trap messages. The keys for trap message processing
+                                                              can take separate passwords than the keys for processing responses messages.
+                                                            Added logic to handle empty strings in _nx_snmp_object_id_get
+                                                            Modified nx_snmp_version_3_process and nx_snmp_version_3_discovery to fix bugs handling discovery requests.
+                                                            Modified nx_snmp_version_3_process to fix bugs when authentication enabled.
+                                                            Added support for negative INTEGER data types in _nx_snmp_utility_object_data_get
+                                                            Added _nx_snmp_agent_v3_context_boots_get()
+                                                            Added support for setting SNMP version at run time and creating private community strings:
+                                                            Created nx_snmp_agent_get_current_version to determine the SNMP version of the most recent
+                                                              SNMP manager packet sent to the agent.
+                                                            Created nx_snmp_agent_set_version to set the enable/disable the SNMP agent for SNMPV1,
+                                                              SNMPV2, and SNMPv3.  These run time settings are overridden by the #defines
+                                                              (NX_SNMP_DISABLE_V1, NX_SNMP_DISABLE_V2,  and NX_SNMP_DISABLE_V3 ).  Enabling the SNMP
+                                                              agent for SNMPv1 at run time has no effect if NX_SNMP_DISABLE_V3 is defined.
+                                                            Created nx_snmp_agent_set_private_string to set the SNMP Agent private string. This enables
+                                                              the agent to have public and private data, and if it will accept the SNMP manager
+                                                              packet SET requests.
+                                                            Created nx_snmp_agent_set_public_string to set the SNMP Agent public string. The default value
+                                                              is "public".  Previously the NetX Duo SNMP Agent did not evaluate the community string
+                                                              and as such allowed all SET requests and all data was considered public.
+                                                            Created nx_snmp_agent_received_private_string to compare the community string
+                                                              in the received SNMP packet with the Agent private string for a match.
+                                                            Modified nx_snmp_agent_version_1_process and nx_snmp_agent_version_2_process to
+                                                              send an error report if an unsupported object type is received.
+                                                            Modified key use services to accept a null key pointer in the error handler; this allows the caller
+                                                              to disable authentication or encryption at run time.
+            nxd_snmp.h                                      Added new API nx_snmp_agent_get_current_version, nx_snmp_agent_set_version,
+                                                              nx_snmp_agent_set_private_string, nx_snmp_agent_set_public_string, and
+                                                              nx_snmp_agent_received_private_string
+
+                                                            Modified the NX_SNMP_AGENT control block to support the new API/features.            
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