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uip.h
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uip.h
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/******************************************************************************
Filename: uip.h
Description: uIP TCP/IP stack for the WiShield 1.0
******************************************************************************
TCP/IP stack and driver for the WiShield 1.0 wireless devices
Copyright(c) 2009 Async Labs Inc. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of version 2 of the GNU General Public License as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Contact Information:
<asynclabs@asynclabs.com>
Author Date Comment
---------------------------------------------------------------
AsyncLabs 05/29/2009 Initial port
*****************************************************************************/
/**
* \addtogroup uip
* @{
*/
/**
* \file
* Header file for the uIP TCP/IP stack.
* \author Adam Dunkels <adam@dunkels.com>
*
* The uIP TCP/IP stack header file contains definitions for a number
* of C macros that are used by uIP programs as well as internal uIP
* structures, TCP/IP header structures and function declarations.
*
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* 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. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* This file is part of the uIP TCP/IP stack.
*
* $Id: uip.h,v 1.40 2006/06/08 07:12:07 adam Exp $
*
*/
#ifndef __UIP_H__
#define __UIP_H__
#include "uipopt.h"
/**
* Repressentation of an IP address.
*
*/
typedef u16_t uip_ip4addr_t[2];
typedef u16_t uip_ip6addr_t[8];
#if UIP_CONF_IPV6
typedef uip_ip6addr_t uip_ipaddr_t;
#else /* UIP_CONF_IPV6 */
typedef uip_ip4addr_t uip_ipaddr_t;
#endif /* UIP_CONF_IPV6 */
/*---------------------------------------------------------------------------*/
/* First, the functions that should be called from the
* system. Initialization, the periodic timer and incoming packets are
* handled by the following three functions.
*/
/**
* \defgroup uipconffunc uIP configuration functions
* @{
*
* The uIP configuration functions are used for setting run-time
* parameters in uIP such as IP addresses.
*/
/**
* Set the IP address of this host.
*
* The IP address is represented as a 4-byte array where the first
* octet of the IP address is put in the first member of the 4-byte
* array.
*
* Example:
\code
uip_ipaddr_t addr;
uip_ipaddr(&addr, 192,168,1,2);
uip_sethostaddr(&addr);
\endcode
* \param addr A pointer to an IP address of type uip_ipaddr_t;
*
* \sa uip_ipaddr()
*
* \hideinitializer
*/
#define uip_sethostaddr(addr) uip_ipaddr_copy(uip_hostaddr, (addr))
/**
* Get the IP address of this host.
*
* The IP address is represented as a 4-byte array where the first
* octet of the IP address is put in the first member of the 4-byte
* array.
*
* Example:
\code
uip_ipaddr_t hostaddr;
uip_gethostaddr(&hostaddr);
\endcode
* \param addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the currently configured IP address.
*
* \hideinitializer
*/
#define uip_gethostaddr(addr) uip_ipaddr_copy((addr), uip_hostaddr)
/**
* Set the default router's IP address.
*
* \param addr A pointer to a uip_ipaddr_t variable containing the IP
* address of the default router.
*
* \sa uip_ipaddr()
*
* \hideinitializer
*/
#define uip_setdraddr(addr) uip_ipaddr_copy(uip_draddr, (addr))
/**
* Set the netmask.
*
* \param addr A pointer to a uip_ipaddr_t variable containing the IP
* address of the netmask.
*
* \sa uip_ipaddr()
*
* \hideinitializer
*/
#define uip_setnetmask(addr) uip_ipaddr_copy(uip_netmask, (addr))
/**
* Get the default router's IP address.
*
* \param addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the IP address of the default router.
*
* \hideinitializer
*/
#define uip_getdraddr(addr) uip_ipaddr_copy((addr), uip_draddr)
/**
* Get the netmask.
*
* \param addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the value of the netmask.
*
* \hideinitializer
*/
#define uip_getnetmask(addr) uip_ipaddr_copy((addr), uip_netmask)
/** @} */
/**
* \defgroup uipinit uIP initialization functions
* @{
*
* The uIP initialization functions are used for booting uIP.
*/
/**
* uIP initialization function.
*
* This function should be called at boot up to initilize the uIP
* TCP/IP stack.
*/
void uip_init(void);
/**
* uIP initialization function.
*
* This function may be used at boot time to set the initial ip_id.
*/
void uip_setipid(u16_t id);
/** @} */
/**
* \defgroup uipdevfunc uIP device driver functions
* @{
*
* These functions are used by a network device driver for interacting
* with uIP.
*/
/**
* Process an incoming packet.
*
* This function should be called when the device driver has received
* a packet from the network. The packet from the device driver must
* be present in the uip_buf buffer, and the length of the packet
* should be placed in the uip_len variable.
*
* When the function returns, there may be an outbound packet placed
* in the uip_buf packet buffer. If so, the uip_len variable is set to
* the length of the packet. If no packet is to be sent out, the
* uip_len variable is set to 0.
*
* The usual way of calling the function is presented by the source
* code below.
\code
uip_len = devicedriver_poll();
if(uip_len > 0) {
uip_input();
if(uip_len > 0) {
devicedriver_send();
}
}
\endcode
*
* \note If you are writing a uIP device driver that needs ARP
* (Address Resolution Protocol), e.g., when running uIP over
* Ethernet, you will need to call the uIP ARP code before calling
* this function:
\code
#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
uip_len = ethernet_devicedrver_poll();
if(uip_len > 0) {
if(BUF->type == HTONS(UIP_ETHTYPE_IP)) {
uip_arp_ipin();
uip_input();
if(uip_len > 0) {
uip_arp_out();
ethernet_devicedriver_send();
}
} else if(BUF->type == HTONS(UIP_ETHTYPE_ARP)) {
uip_arp_arpin();
if(uip_len > 0) {
ethernet_devicedriver_send();
}
}
\endcode
*
* \hideinitializer
*/
#define uip_input() uip_process(UIP_DATA)
/**
* Periodic processing for a connection identified by its number.
*
* This function does the necessary periodic processing (timers,
* polling) for a uIP TCP conneciton, and should be called when the
* periodic uIP timer goes off. It should be called for every
* connection, regardless of whether they are open of closed.
*
* When the function returns, it may have an outbound packet waiting
* for service in the uIP packet buffer, and if so the uip_len
* variable is set to a value larger than zero. The device driver
* should be called to send out the packet.
*
* The ususal way of calling the function is through a for() loop like
* this:
\code
for(i = 0; i < UIP_CONNS; ++i) {
uip_periodic(i);
if(uip_len > 0) {
devicedriver_send();
}
}
\endcode
*
* \note If you are writing a uIP device driver that needs ARP
* (Address Resolution Protocol), e.g., when running uIP over
* Ethernet, you will need to call the uip_arp_out() function before
* calling the device driver:
\code
for(i = 0; i < UIP_CONNS; ++i) {
uip_periodic(i);
if(uip_len > 0) {
uip_arp_out();
ethernet_devicedriver_send();
}
}
\endcode
*
* \param conn The number of the connection which is to be periodically polled.
*
* \hideinitializer
*/
#define uip_periodic(conn) do { uip_conn = &uip_conns[conn]; \
uip_process(UIP_TIMER); } while (0)
/**
*
*
*/
#define uip_conn_active(conn) (uip_conns[conn].tcpstateflags != UIP_CLOSED)
/**
* Perform periodic processing for a connection identified by a pointer
* to its structure.
*
* Same as uip_periodic() but takes a pointer to the actual uip_conn
* struct instead of an integer as its argument. This function can be
* used to force periodic processing of a specific connection.
*
* \param conn A pointer to the uip_conn struct for the connection to
* be processed.
*
* \hideinitializer
*/
#define uip_periodic_conn(conn) do { uip_conn = conn; \
uip_process(UIP_TIMER); } while (0)
/**
* Reuqest that a particular connection should be polled.
*
* Similar to uip_periodic_conn() but does not perform any timer
* processing. The application is polled for new data.
*
* \param conn A pointer to the uip_conn struct for the connection to
* be processed.
*
* \hideinitializer
*/
#define uip_poll_conn(conn) do { uip_conn = conn; \
uip_process(UIP_POLL_REQUEST); } while (0)
#if UIP_UDP
/**
* Periodic processing for a UDP connection identified by its number.
*
* This function is essentially the same as uip_periodic(), but for
* UDP connections. It is called in a similar fashion as the
* uip_periodic() function:
\code
for(i = 0; i < UIP_UDP_CONNS; i++) {
uip_udp_periodic(i);
if(uip_len > 0) {
devicedriver_send();
}
}
\endcode
*
* \note As for the uip_periodic() function, special care has to be
* taken when using uIP together with ARP and Ethernet:
\code
for(i = 0; i < UIP_UDP_CONNS; i++) {
uip_udp_periodic(i);
if(uip_len > 0) {
uip_arp_out();
ethernet_devicedriver_send();
}
}
\endcode
*
* \param conn The number of the UDP connection to be processed.
*
* \hideinitializer
*/
#define uip_udp_periodic(conn) do { uip_udp_conn = &uip_udp_conns[conn]; \
uip_process(UIP_UDP_TIMER); } while (0)
/**
* Periodic processing for a UDP connection identified by a pointer to
* its structure.
*
* Same as uip_udp_periodic() but takes a pointer to the actual
* uip_conn struct instead of an integer as its argument. This
* function can be used to force periodic processing of a specific
* connection.
*
* \param conn A pointer to the uip_udp_conn struct for the connection
* to be processed.
*
* \hideinitializer
*/
#define uip_udp_periodic_conn(conn) do { uip_udp_conn = conn; \
uip_process(UIP_UDP_TIMER); } while (0)
#endif /* UIP_UDP */
/**
* The uIP packet buffer.
*
* The uip_buf array is used to hold incoming and outgoing
* packets. The device driver should place incoming data into this
* buffer. When sending data, the device driver should read the link
* level headers and the TCP/IP headers from this buffer. The size of
* the link level headers is configured by the UIP_LLH_LEN define.
*
* \note The application data need not be placed in this buffer, so
* the device driver must read it from the place pointed to by the
* uip_appdata pointer as illustrated by the following example:
\code
void
devicedriver_send(void)
{
hwsend(&uip_buf[0], UIP_LLH_LEN);
if(uip_len <= UIP_LLH_LEN + UIP_TCPIP_HLEN) {
hwsend(&uip_buf[UIP_LLH_LEN], uip_len - UIP_LLH_LEN);
} else {
hwsend(&uip_buf[UIP_LLH_LEN], UIP_TCPIP_HLEN);
hwsend(uip_appdata, uip_len - UIP_TCPIP_HLEN - UIP_LLH_LEN);
}
}
\endcode
*/
extern u8_t uip_buf[UIP_BUFSIZE+2];
/** @} */
/*---------------------------------------------------------------------------*/
/* Functions that are used by the uIP application program. Opening and
* closing connections, sending and receiving data, etc. is all
* handled by the functions below.
*/
/**
* \defgroup uipappfunc uIP application functions
* @{
*
* Functions used by an application running of top of uIP.
*/
/**
* Start listening to the specified port.
*
* \note Since this function expects the port number in network byte
* order, a conversion using HTONS() or htons() is necessary.
*
\code
uip_listen(HTONS(80));
\endcode
*
* \param port A 16-bit port number in network byte order.
*/
void uip_listen(u16_t port);
/**
* Stop listening to the specified port.
*
* \note Since this function expects the port number in network byte
* order, a conversion using HTONS() or htons() is necessary.
*
\code
uip_unlisten(HTONS(80));
\endcode
*
* \param port A 16-bit port number in network byte order.
*/
void uip_unlisten(u16_t port);
/**
* Connect to a remote host using TCP.
*
* This function is used to start a new connection to the specified
* port on the specied host. It allocates a new connection identifier,
* sets the connection to the SYN_SENT state and sets the
* retransmission timer to 0. This will cause a TCP SYN segment to be
* sent out the next time this connection is periodically processed,
* which usually is done within 0.5 seconds after the call to
* uip_connect().
*
* \note This function is avaliable only if support for active open
* has been configured by defining UIP_ACTIVE_OPEN to 1 in uipopt.h.
*
* \note Since this function requires the port number to be in network
* byte order, a conversion using HTONS() or htons() is necessary.
*
\code
uip_ipaddr_t ipaddr;
uip_ipaddr(&ipaddr, 192,168,1,2);
uip_connect(&ipaddr, HTONS(80));
\endcode
*
* \param ripaddr The IP address of the remote hot.
*
* \param port A 16-bit port number in network byte order.
*
* \return A pointer to the uIP connection identifier for the new connection,
* or NULL if no connection could be allocated.
*
*/
struct uip_conn *uip_connect(uip_ipaddr_t *ripaddr, u16_t port);
/**
* \internal
*
* Check if a connection has outstanding (i.e., unacknowledged) data.
*
* \param conn A pointer to the uip_conn structure for the connection.
*
* \hideinitializer
*/
#define uip_outstanding(conn) ((conn)->len)
/**
* Send data on the current connection.
*
* This function is used to send out a single segment of TCP
* data. Only applications that have been invoked by uIP for event
* processing can send data.
*
* The amount of data that actually is sent out after a call to this
* funcion is determined by the maximum amount of data TCP allows. uIP
* will automatically crop the data so that only the appropriate
* amount of data is sent. The function uip_mss() can be used to query
* uIP for the amount of data that actually will be sent.
*
* \note This function does not guarantee that the sent data will
* arrive at the destination. If the data is lost in the network, the
* application will be invoked with the uip_rexmit() event being
* set. The application will then have to resend the data using this
* function.
*
* \param data A pointer to the data which is to be sent.
*
* \param len The maximum amount of data bytes to be sent.
*
* \hideinitializer
*/
void uip_send(const void *data, int len);
/**
* The length of any incoming data that is currently avaliable (if avaliable)
* in the uip_appdata buffer.
*
* The test function uip_data() must first be used to check if there
* is any data available at all.
*
* \hideinitializer
*/
/*void uip_datalen(void);*/
#define uip_datalen() uip_len
/**
* The length of any out-of-band data (urgent data) that has arrived
* on the connection.
*
* \note The configuration parameter UIP_URGDATA must be set for this
* function to be enabled.
*
* \hideinitializer
*/
#define uip_urgdatalen() uip_urglen
/**
* Close the current connection.
*
* This function will close the current connection in a nice way.
*
* \hideinitializer
*/
#define uip_close() (uip_flags = UIP_CLOSE)
/**
* Abort the current connection.
*
* This function will abort (reset) the current connection, and is
* usually used when an error has occured that prevents using the
* uip_close() function.
*
* \hideinitializer
*/
#define uip_abort() (uip_flags = UIP_ABORT)
/**
* Tell the sending host to stop sending data.
*
* This function will close our receiver's window so that we stop
* receiving data for the current connection.
*
* \hideinitializer
*/
#define uip_stop() (uip_conn->tcpstateflags |= UIP_STOPPED)
/**
* Find out if the current connection has been previously stopped with
* uip_stop().
*
* \hideinitializer
*/
#define uip_stopped(conn) ((conn)->tcpstateflags & UIP_STOPPED)
/**
* Restart the current connection, if is has previously been stopped
* with uip_stop().
*
* This function will open the receiver's window again so that we
* start receiving data for the current connection.
*
* \hideinitializer
*/
#define uip_restart() do { uip_flags |= UIP_NEWDATA; \
uip_conn->tcpstateflags &= ~UIP_STOPPED; \
} while(0)
/* uIP tests that can be made to determine in what state the current
connection is, and what the application function should do. */
/**
* Is the current connection a UDP connection?
*
* This function checks whether the current connection is a UDP connection.
*
* \hideinitializer
*
*/
#define uip_udpconnection() (uip_conn == NULL)
/**
* Is new incoming data available?
*
* Will reduce to non-zero if there is new data for the application
* present at the uip_appdata pointer. The size of the data is
* avaliable through the uip_len variable.
*
* \hideinitializer
*/
#define uip_newdata() (uip_flags & UIP_NEWDATA)
/**
* Has previously sent data been acknowledged?
*
* Will reduce to non-zero if the previously sent data has been
* acknowledged by the remote host. This means that the application
* can send new data.
*
* \hideinitializer
*/
#define uip_acked() (uip_flags & UIP_ACKDATA)
/**
* Has the connection just been connected?
*
* Reduces to non-zero if the current connection has been connected to
* a remote host. This will happen both if the connection has been
* actively opened (with uip_connect()) or passively opened (with
* uip_listen()).
*
* \hideinitializer
*/
#define uip_connected() (uip_flags & UIP_CONNECTED)
/**
* Has the connection been closed by the other end?
*
* Is non-zero if the connection has been closed by the remote
* host. The application may then do the necessary clean-ups.
*
* \hideinitializer
*/
#define uip_closed() (uip_flags & UIP_CLOSE)
/**
* Has the connection been aborted by the other end?
*
* Non-zero if the current connection has been aborted (reset) by the
* remote host.
*
* \hideinitializer
*/
#define uip_aborted() (uip_flags & UIP_ABORT)
/**
* Has the connection timed out?
*
* Non-zero if the current connection has been aborted due to too many
* retransmissions.
*
* \hideinitializer
*/
#define uip_timedout() (uip_flags & UIP_TIMEDOUT)
/**
* Do we need to retransmit previously data?
*
* Reduces to non-zero if the previously sent data has been lost in
* the network, and the application should retransmit it. The
* application should send the exact same data as it did the last
* time, using the uip_send() function.
*
* \hideinitializer
*/
#define uip_rexmit() (uip_flags & UIP_REXMIT)
/**
* Is the connection being polled by uIP?
*
* Is non-zero if the reason the application is invoked is that the
* current connection has been idle for a while and should be
* polled.
*
* The polling event can be used for sending data without having to
* wait for the remote host to send data.
*
* \hideinitializer
*/
#define uip_poll() (uip_flags & UIP_POLL)
/**
* Get the initial maxium segment size (MSS) of the current
* connection.
*
* \hideinitializer
*/
#define uip_initialmss() (uip_conn->initialmss)
/**
* Get the current maxium segment size that can be sent on the current
* connection.
*
* The current maxiumum segment size that can be sent on the
* connection is computed from the receiver's window and the MSS of
* the connection (which also is available by calling
* uip_initialmss()).
*
* \hideinitializer
*/
#define uip_mss() (uip_conn->mss)
/**
* Set up a new UDP connection.
*
* This function sets up a new UDP connection. The function will
* automatically allocate an unused local port for the new
* connection. However, another port can be chosen by using the
* uip_udp_bind() call, after the uip_udp_new() function has been
* called.
*
* Example:
\code
uip_ipaddr_t addr;
struct uip_udp_conn *c;
uip_ipaddr(&addr, 192,168,2,1);
c = uip_udp_new(&addr, HTONS(12345));
if(c != NULL) {
uip_udp_bind(c, HTONS(12344));
}
\endcode
* \param ripaddr The IP address of the remote host.
*
* \param rport The remote port number in network byte order.
*
* \return The uip_udp_conn structure for the new connection or NULL
* if no connection could be allocated.
*/
struct uip_udp_conn *uip_udp_new(uip_ipaddr_t *ripaddr, u16_t rport);
/**
* Removed a UDP connection.
*
* \param conn A pointer to the uip_udp_conn structure for the connection.
*
* \hideinitializer
*/
#define uip_udp_remove(conn) (conn)->lport = 0
/**
* Bind a UDP connection to a local port.
*
* \param conn A pointer to the uip_udp_conn structure for the
* connection.
*
* \param port The local port number, in network byte order.
*
* \hideinitializer
*/
#define uip_udp_bind(conn, port) (conn)->lport = port
/**
* Send a UDP datagram of length len on the current connection.
*
* This function can only be called in response to a UDP event (poll
* or newdata). The data must be present in the uip_buf buffer, at the
* place pointed to by the uip_appdata pointer.
*
* \param len The length of the data in the uip_buf buffer.
*
* \hideinitializer
*/
#define uip_udp_send(len) uip_send((char *)uip_appdata, len)
/** @} */
/* uIP convenience and converting functions. */
/**
* \defgroup uipconvfunc uIP conversion functions
* @{
*
* These functions can be used for converting between different data
* formats used by uIP.
*/
/**
* Construct an IP address from four bytes.
*
* This function constructs an IP address of the type that uIP handles
* internally from four bytes. The function is handy for specifying IP
* addresses to use with e.g. the uip_connect() function.
*
* Example:
\code
uip_ipaddr_t ipaddr;
struct uip_conn *c;
uip_ipaddr(&ipaddr, 192,168,1,2);
c = uip_connect(&ipaddr, HTONS(80));
\endcode
*
* \param addr A pointer to a uip_ipaddr_t variable that will be
* filled in with the IP address.
*
* \param addr0 The first octet of the IP address.
* \param addr1 The second octet of the IP address.
* \param addr2 The third octet of the IP address.
* \param addr3 The forth octet of the IP address.
*
* \hideinitializer
*/
#define uip_ipaddr(addr, addr0,addr1,addr2,addr3) do { \
((u16_t *)(addr))[0] = HTONS(((addr0) << 8) | (addr1 & 0x00ff)); \
((u16_t *)(addr))[1] = HTONS(((addr2) << 8) | (addr3 & 0x00ff)); \
} while(0)
/**
* Construct an IPv6 address from eight 16-bit words.
*
* This function constructs an IPv6 address.
*
* \hideinitializer
*/
#define uip_ip6addr(addr, addr0,addr1,addr2,addr3,addr4,addr5,addr6,addr7) do { \
((u16_t *)(addr))[0] = HTONS((addr0)); \
((u16_t *)(addr))[1] = HTONS((addr1)); \
((u16_t *)(addr))[2] = HTONS((addr2)); \
((u16_t *)(addr))[3] = HTONS((addr3)); \
((u16_t *)(addr))[4] = HTONS((addr4)); \
((u16_t *)(addr))[5] = HTONS((addr5)); \
((u16_t *)(addr))[6] = HTONS((addr6)); \
((u16_t *)(addr))[7] = HTONS((addr7)); \
} while(0)
/**
* Copy an IP address to another IP address.
*
* Copies an IP address from one place to another.
*
* Example:
\code
uip_ipaddr_t ipaddr1, ipaddr2;
uip_ipaddr(&ipaddr1, 192,16,1,2);
uip_ipaddr_copy(&ipaddr2, &ipaddr1);
\endcode
*
* \param dest The destination for the copy.
* \param src The source from where to copy.
*
* \hideinitializer
*/
#if !UIP_CONF_IPV6
#define uip_ipaddr_copy(dest, src) do { \
((u16_t *)dest)[0] = ((u16_t *)src)[0]; \
((u16_t *)dest)[1] = ((u16_t *)src)[1]; \
} while(0)
#else /* !UIP_CONF_IPV6 */
#define uip_ipaddr_copy(dest, src) memcpy(dest, src, sizeof(uip_ip6addr_t))
#endif /* !UIP_CONF_IPV6 */
/**
* Compare two IP addresses
*
* Compares two IP addresses.
*
* Example:
\code
uip_ipaddr_t ipaddr1, ipaddr2;
uip_ipaddr(&ipaddr1, 192,16,1,2);
if(uip_ipaddr_cmp(&ipaddr2, &ipaddr1)) {
printf("They are the same");
}
\endcode
*
* \param addr1 The first IP address.
* \param addr2 The second IP address.
*
* \hideinitializer
*/
#if !UIP_CONF_IPV6
#define uip_ipaddr_cmp(addr1, addr2) (((u16_t *)addr1)[0] == ((u16_t *)addr2)[0] && \
((u16_t *)addr1)[1] == ((u16_t *)addr2)[1])
#else /* !UIP_CONF_IPV6 */
#define uip_ipaddr_cmp(addr1, addr2) (memcmp(addr1, addr2, sizeof(uip_ip6addr_t)) == 0)
#endif /* !UIP_CONF_IPV6 */
/**
* Compare two IP addresses with netmasks
*
* Compares two IP addresses with netmasks. The masks are used to mask
* out the bits that are to be compared.
*
* Example:
\code
uip_ipaddr_t ipaddr1, ipaddr2, mask;
uip_ipaddr(&mask, 255,255,255,0);
uip_ipaddr(&ipaddr1, 192,16,1,2);
uip_ipaddr(&ipaddr2, 192,16,1,3);
if(uip_ipaddr_maskcmp(&ipaddr1, &ipaddr2, &mask)) {
printf("They are the same");
}
\endcode
*
* \param addr1 The first IP address.
* \param addr2 The second IP address.
* \param mask The netmask.
*
* \hideinitializer
*/
#define uip_ipaddr_maskcmp(addr1, addr2, mask) \
(((((u16_t *)addr1)[0] & ((u16_t *)mask)[0]) == \
(((u16_t *)addr2)[0] & ((u16_t *)mask)[0])) && \
((((u16_t *)addr1)[1] & ((u16_t *)mask)[1]) == \
(((u16_t *)addr2)[1] & ((u16_t *)mask)[1])))
/**
* Mask out the network part of an IP address.
*
* Masks out the network part of an IP address, given the address and
* the netmask.
*
* Example:
\code
uip_ipaddr_t ipaddr1, ipaddr2, netmask;
uip_ipaddr(&ipaddr1, 192,16,1,2);
uip_ipaddr(&netmask, 255,255,255,0);
uip_ipaddr_mask(&ipaddr2, &ipaddr1, &netmask);
\endcode
*
* In the example above, the variable "ipaddr2" will contain the IP
* address 192.168.1.0.
*
* \param dest Where the result is to be placed.
* \param src The IP address.