Contiki 2.6

uip-udp-packet.c

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00001 /*
00002  * Copyright (c) 2006, Swedish Institute of Computer Science.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * This file is part of the Contiki operating system.
00030  *
00031  * $Id: uip-udp-packet.c,v 1.7 2009/10/18 22:02:01 adamdunkels Exp $
00032  */
00033 
00034 /**
00035  * \file
00036  *         Module for sending UDP packets through uIP.
00037  * \author
00038  *         Adam Dunkels <adam@sics.se>
00039  */
00040 
00041 #include "contiki-conf.h"
00042 
00043 extern uint16_t uip_slen;
00044 
00045 #include "net/uip-udp-packet.h"
00046 
00047 #include <string.h>
00048 
00049 /*---------------------------------------------------------------------------*/
00050 void
00051 uip_udp_packet_send(struct uip_udp_conn *c, const void *data, int len)
00052 {
00053 #if UIP_UDP
00054   if(data != NULL) {
00055     uip_udp_conn = c;
00056     uip_slen = len;
00057     memcpy(&uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN], data,
00058            len > UIP_BUFSIZE? UIP_BUFSIZE: len);
00059     uip_process(UIP_UDP_SEND_CONN);
00060 #if UIP_CONF_IPV6
00061     tcpip_ipv6_output();
00062 #else
00063     if(uip_len > 0) {
00064       tcpip_output();
00065     }
00066 #endif
00067   }
00068   uip_slen = 0;
00069 #endif /* UIP_UDP */
00070 }
00071 /*---------------------------------------------------------------------------*/
00072 void
00073 uip_udp_packet_sendto(struct uip_udp_conn *c, const void *data, int len,
00074                       const uip_ipaddr_t *toaddr, uint16_t toport)
00075 {
00076   uip_ipaddr_t curaddr;
00077   uint16_t curport;
00078 
00079   if(toaddr != NULL) {
00080     /* Save current IP addr/port. */
00081     uip_ipaddr_copy(&curaddr, &c->ripaddr);
00082     curport = c->rport;
00083 
00084     /* Load new IP addr/port */
00085     uip_ipaddr_copy(&c->ripaddr, toaddr);
00086     c->rport = toport;
00087 
00088     uip_udp_packet_send(c, data, len);
00089 
00090     /* Restore old IP addr/port */
00091     uip_ipaddr_copy(&c->ripaddr, &curaddr);
00092     c->rport = curport;
00093   }
00094 }
00095 /*---------------------------------------------------------------------------*/