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114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
/*
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* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \addtogroup cc2538-examples
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* @{
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*
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* \defgroup cc2538-echo-server cc2538dk UDP Echo Server Project
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*
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* Tests that a node can correctly join an RPL network and also tests UDP
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* functionality
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* @{
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*
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* \file
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* An example of a simple UDP echo server for the cc2538dk platform
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*/
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#include "contiki.h"
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#include "contiki-lib.h"
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#include "contiki-net.h"
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#include <string.h>
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#define DEBUG DEBUG_PRINT
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#include "net/ip/uip-debug.h"
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#include "dev/watchdog.h"
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#include "dev/leds.h"
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#include "net/rpl/rpl.h"
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/*---------------------------------------------------------------------------*/
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#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
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#define UIP_UDP_BUF ((struct uip_udp_hdr *)&uip_buf[uip_l2_l3_hdr_len])
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#define MAX_PAYLOAD_LEN 120
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/*---------------------------------------------------------------------------*/
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static struct uip_udp_conn *server_conn;
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static char buf[MAX_PAYLOAD_LEN];
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static uint16_t len;
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/*---------------------------------------------------------------------------*/
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PROCESS(udp_echo_server_process, "UDP echo server process");
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AUTOSTART_PROCESSES(&udp_echo_server_process);
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/*---------------------------------------------------------------------------*/
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static void
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tcpip_handler(void)
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{
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memset(buf, 0, MAX_PAYLOAD_LEN);
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if(uip_newdata()) {
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leds_on(LEDS_RED);
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len = uip_datalen();
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memcpy(buf, uip_appdata, len);
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PRINTF("%u bytes from [", len);
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PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
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PRINTF("]:%u\n", UIP_HTONS(UIP_UDP_BUF->srcport));
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uip_ipaddr_copy(&server_conn->ripaddr, &UIP_IP_BUF->srcipaddr);
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server_conn->rport = UIP_UDP_BUF->srcport;
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uip_udp_packet_send(server_conn, buf, len);
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uip_create_unspecified(&server_conn->ripaddr);
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server_conn->rport = 0;
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}
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leds_off(LEDS_RED);
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return;
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(udp_echo_server_process, ev, data)
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{
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PROCESS_BEGIN();
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PRINTF("Starting UDP echo server\n");
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server_conn = udp_new(NULL, UIP_HTONS(0), NULL);
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udp_bind(server_conn, UIP_HTONS(3000));
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PRINTF("Listen port: 3000, TTL=%u\n", server_conn->ttl);
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while(1) {
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PROCESS_YIELD();
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if(ev == tcpip_event) {
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tcpip_handler();
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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*/
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