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{lib/uknetdev, virtio}: PR-unikraft#1088 IPv4/TCP segmentation offload
Signed-off-by: Marco Schlumpp <marco@unikraft.io>
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| /* SPDX-License-Identifier: BSD-3-Clause */ | ||
| /* | ||
| * Authors: Marco Schlumpp <marco@unikraft.io> | ||
| * | ||
| * Copyright (c) 2022, Unikraft GmbH. All rights reserved. | ||
| * Copyright (c) 1982, 1986, 1993 | ||
| * The Regents of the University of California. All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions | ||
| * are met: | ||
| * | ||
| * 1. Redistributions of source code must retain the above copyright | ||
| * notice, this list of conditions and the following disclaimer. | ||
| * 2. Redistributions in binary form must reproduce the above copyright | ||
| * notice, this list of conditions and the following disclaimer in the | ||
| * documentation and/or other materials provided with the distribution. | ||
| * 3. Neither the name of the copyright holder nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | ||
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| * POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
| #ifndef __UK_NETSTRUCTS__ | ||
| #define __UK_NETSTRUCTS__ | ||
|
|
||
| #include <stdint.h> | ||
| #include <uk/essentials.h> | ||
|
|
||
| #include "netdev_core.h" | ||
|
|
||
| /* | ||
| * Some basic Ethernet constants. | ||
| */ | ||
| #define UK_ETHER_ADDR_LEN 6 /* length of an Ethernet address */ | ||
| #define UK_ETHER_TYPE_LEN 2 /* length of the Ethernet type field */ | ||
| #define UK_ETHER_CRC_LEN 4 /* length of the Ethernet CRC */ | ||
| #define UK_ETHER_HDR_LEN (UK_ETHER_ADDR_LEN*2+UK_ETHER_TYPE_LEN) | ||
| #define UK_ETHER_MIN_LEN 64 /* minimum frame len, including CRC */ | ||
| #define UK_ETHER_MAX_LEN 1518 /* maximum frame len, including CRC */ | ||
| #define UK_ETHER_MAX_LEN_JUMBO 9018 /* max jumbo frame len, including CRC */ | ||
|
|
||
| #define UK_ETHER_VLAN_ENCAP_LEN 4 /* len of 802.1Q VLAN encapsulation */ | ||
|
|
||
| /* | ||
| * 802.1q Virtual LAN header. | ||
| */ | ||
| struct uk_ether_vlan_header { | ||
| uint8_t evl_dhost[UK_ETH_ADDR_LEN]; | ||
| uint8_t evl_shost[UK_ETH_ADDR_LEN]; | ||
| uint16_t evl_encap_proto; | ||
| uint16_t evl_tag; | ||
| uint16_t evl_proto; | ||
| } __packed; | ||
|
|
||
| #define UK_ETHERTYPE_IP 0x0800 /* IP protocol */ | ||
| #define UK_ETHERTYPE_VLAN 0x8100 /* IEEE 802.1Q VLAN tagging */ | ||
| #define UK_ETHERTYPE_IPV6 0x86DD /* IP protocol version 6 */ | ||
|
|
||
| /* | ||
| * Structure of an internet header, naked of options. | ||
| */ | ||
| struct uk_iphdr { | ||
| #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ | ||
| uint8_t ip_hl:4, /* header length */ | ||
| ip_v:4; /* version */ | ||
| #endif | ||
| #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ | ||
| uint8_t ip_v:4, /* version */ | ||
| ip_hl:4; /* header length */ | ||
| #endif | ||
| uint8_t ip_tos; /* type of service */ | ||
| uint16_t ip_len; /* total length */ | ||
| uint16_t ip_id; /* identification */ | ||
| uint16_t ip_off; /* fragment offset field */ | ||
| #define UK_IP_RF 0x8000 /* reserved fragment flag */ | ||
| #define UK_IP_DF 0x4000 /* dont fragment flag */ | ||
| #define UK_IP_MF 0x2000 /* more fragments flag */ | ||
| #define UK_IP_OFFMASK 0x1fff /* mask for fragmenting bits */ | ||
| uint8_t ip_ttl; /* time to live */ | ||
| uint8_t ip_p; /* protocol */ | ||
| uint16_t ip_sum; /* checksum */ | ||
| uint32_t ip_src, ip_dst; /* source and dest address */ | ||
| } __packed __align(2); | ||
|
|
||
| #define UK_IPPROTO_IP 0 /* dummy for IP */ | ||
| #define UK_IPPROTO_ICMP 1 /* control message protocol */ | ||
| #define UK_IPPROTO_TCP 6 /* tcp */ | ||
| #define UK_IPPROTO_UDP 17 /* user datagram protocol */ | ||
| #define UK_IPPROTO_IPV6 41 /* IP6 header */ | ||
|
|
||
| /* | ||
| * TCP header. | ||
| * Per RFC 793, September, 1981. | ||
| */ | ||
| struct uk_tcphdr { | ||
| uint16_t th_sport; /* source port */ | ||
| uint16_t th_dport; /* destination port */ | ||
| uint32_t th_seq; /* sequence number */ | ||
| uint32_t th_ack; /* acknowledgement number */ | ||
| #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ | ||
| uint8_t th_x2:4, /* upper 4 (reserved) flags */ | ||
| th_off:4; /* data offset */ | ||
| #endif | ||
| #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ | ||
| uint8_t th_off:4, /* data offset */ | ||
| th_x2:4; /* upper 4 (reserved) flags */ | ||
| #endif | ||
| uint8_t th_flags; | ||
| #define UK_TH_FIN 0x01 | ||
| #define UK_TH_SYN 0x02 | ||
| #define UK_TH_RST 0x04 | ||
| #define UK_TH_PUSH 0x08 | ||
| #define UK_TH_ACK 0x10 | ||
| #define UK_TH_URG 0x20 | ||
| #define UK_TH_ECE 0x40 | ||
| #define UK_TH_CWR 0x80 | ||
| #define UK_TH_AE 0x100 /* maps into th_x2 */ | ||
| #define UK_TH_FLAGS (UK_TH_FIN|UK_TH_SYN|UK_TH_RST|UK_TH_PUSH|UK_TH_ACK| \ | ||
| UK_TH_URG|UK_TH_ECE|UK_TH_CWR) | ||
|
|
||
| uint16_t th_win; /* window */ | ||
| uint16_t th_sum; /* checksum */ | ||
| uint16_t th_urp; /* urgent pointer */ | ||
| }; | ||
|
|
||
| #endif /* __UK_NETSTRUCTS__ */ |