137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
/*
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* Copyright (c) 2010, Loughborough University - Computer Science
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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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*/
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/**
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* \file
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* This node is part of the RPL multicast example. It is a node that
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* joins a multicast group and listens for messages. It also knows how
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* to forward messages down the tree.
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* For the example to work, we need one or more of those nodes.
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*
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* \author
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* George Oikonomou - <oikonomou@users.sourceforge.net>
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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 "net/ipv6/multicast/uip-mcast6.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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#define MCAST_SINK_UDP_PORT 3001 /* Host byte order */
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static struct uip_udp_conn *sink_conn;
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static uint16_t count;
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#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
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#if !UIP_CONF_IPV6 || !UIP_CONF_ROUTER || !UIP_CONF_IPV6_MULTICAST || !UIP_CONF_IPV6_RPL
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#error "This example can not work with the current contiki configuration"
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#error "Check the values of: UIP_CONF_IPV6, UIP_CONF_ROUTER, UIP_CONF_IPV6_RPL"
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#endif
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/*---------------------------------------------------------------------------*/
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PROCESS(mcast_sink_process, "Multicast Sink");
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AUTOSTART_PROCESSES(&mcast_sink_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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if(uip_newdata()) {
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count++;
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PRINTF("In: [0x%08lx], TTL %u, total %u\n",
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uip_ntohl((unsigned long) *((uint32_t *)(uip_appdata))),
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UIP_IP_BUF->ttl, count);
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}
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return;
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}
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/*---------------------------------------------------------------------------*/
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static uip_ds6_maddr_t *
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join_mcast_group(void)
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{
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uip_ipaddr_t addr;
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uip_ds6_maddr_t *rv;
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/* First, set our v6 global */
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uip_ip6addr(&addr, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
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uip_ds6_set_addr_iid(&addr, &uip_lladdr);
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uip_ds6_addr_add(&addr, 0, ADDR_AUTOCONF);
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/*
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* IPHC will use stateless multicast compression for this destination
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* (M=1, DAC=0), with 32 inline bits (1E 89 AB CD)
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*/
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uip_ip6addr(&addr, 0xFF1E,0,0,0,0,0,0x89,0xABCD);
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rv = uip_ds6_maddr_add(&addr);
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if(rv) {
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PRINTF("Joined multicast group ");
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PRINT6ADDR(&uip_ds6_maddr_lookup(&addr)->ipaddr);
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PRINTF("\n");
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}
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return rv;
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(mcast_sink_process, ev, data)
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{
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PROCESS_BEGIN();
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PRINTF("Multicast Engine: '%s'\n", UIP_MCAST6.name);
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if(join_mcast_group() == NULL) {
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PRINTF("Failed to join multicast group\n");
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PROCESS_EXIT();
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}
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count = 0;
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sink_conn = udp_new(NULL, UIP_HTONS(0), NULL);
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udp_bind(sink_conn, UIP_HTONS(MCAST_SINK_UDP_PORT));
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PRINTF("Listening: ");
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PRINT6ADDR(&sink_conn->ripaddr);
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PRINTF(" local/remote port %u/%u\n",
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UIP_HTONS(sink_conn->lport), UIP_HTONS(sink_conn->rport));
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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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