contiki/core/net/ip/uip-udp-packet.c

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/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Module for sending UDP packets through uIP.
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki-conf.h"
extern uint16_t uip_slen;
#include "net/ip/uip-udp-packet.h"
#include "net/ipv6/multicast/uip-mcast6.h"
#include <string.h>
/*---------------------------------------------------------------------------*/
void
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uip_udp_packet_send(struct uip_udp_conn *c, const void *data, int len)
{
#if UIP_UDP
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if(data != NULL) {
uip_udp_conn = c;
uip_slen = len;
memmove(&uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN], data,
len > UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN?
UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN: len);
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uip_process(UIP_UDP_SEND_CONN);
#if UIP_CONF_IPV6_MULTICAST
/* Let the multicast engine process the datagram before we send it */
if(uip_is_addr_mcast_routable(&uip_udp_conn->ripaddr)) {
UIP_MCAST6.out();
}
#endif /* UIP_IPV6_MULTICAST */
#if NETSTACK_CONF_WITH_IPV6
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tcpip_ipv6_output();
#else
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if(uip_len > 0) {
tcpip_output();
}
#endif
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}
uip_slen = 0;
#endif /* UIP_UDP */
}
/*---------------------------------------------------------------------------*/
void
uip_udp_packet_sendto(struct uip_udp_conn *c, const void *data, int len,
const uip_ipaddr_t *toaddr, uint16_t toport)
{
uip_ipaddr_t curaddr;
uint16_t curport;
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if(toaddr != NULL) {
/* Save current IP addr/port. */
uip_ipaddr_copy(&curaddr, &c->ripaddr);
curport = c->rport;
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/* Load new IP addr/port */
uip_ipaddr_copy(&c->ripaddr, toaddr);
c->rport = toport;
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uip_udp_packet_send(c, data, len);
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/* Restore old IP addr/port */
uip_ipaddr_copy(&c->ripaddr, &curaddr);
c->rport = curport;
}
}
/*---------------------------------------------------------------------------*/