Contiki 2.6
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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 /*---------------------------------------------------------------------------*/