nes-proj/examples/ipv6/multicast/sink.c

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/*
* Copyright (c) 2010, Loughborough University - 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
* This node is part of the RPL multicast example. It is a node that
* joins a multicast group and listens for messages. It also knows how
* to forward messages down the tree.
* For the example to work, we need one or more of those nodes.
*
* \author
* George Oikonomou - <oikonomou@users.sourceforge.net>
*/
#include "contiki.h"
#include "contiki-lib.h"
#include "contiki-net.h"
#include "net/ipv6/multicast/uip-mcast6.h"
#include <string.h>
#define DEBUG DEBUG_PRINT
#include "net/ip/uip-debug.h"
#define MCAST_SINK_UDP_PORT 3001 /* Host byte order */
static struct uip_udp_conn *sink_conn;
static uint16_t count;
#define UIP_IP_BUF ((struct uip_ip_hdr *)&uip_buf[UIP_LLH_LEN])
#if !NETSTACK_CONF_WITH_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"
#error "Check the values of: NETSTACK_CONF_WITH_IPV6, UIP_CONF_ROUTER, UIP_CONF_IPV6_RPL"
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#endif
/*---------------------------------------------------------------------------*/
PROCESS(mcast_sink_process, "Multicast Sink");
AUTOSTART_PROCESSES(&mcast_sink_process);
/*---------------------------------------------------------------------------*/
static void
tcpip_handler(void)
{
if(uip_newdata()) {
count++;
PRINTF("In: [0x%08lx], TTL %u, total %u\n",
uip_ntohl((unsigned long) *((uint32_t *)(uip_appdata))),
UIP_IP_BUF->ttl, count);
}
return;
}
/*---------------------------------------------------------------------------*/
static uip_ds6_maddr_t *
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join_mcast_group(void)
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{
uip_ipaddr_t addr;
uip_ds6_maddr_t *rv;
/* First, set our v6 global */
uip_ip6addr(&addr, 0xaaaa, 0, 0, 0, 0, 0, 0, 0);
uip_ds6_set_addr_iid(&addr, &uip_lladdr);
uip_ds6_addr_add(&addr, 0, ADDR_AUTOCONF);
/*
* IPHC will use stateless multicast compression for this destination
* (M=1, DAC=0), with 32 inline bits (1E 89 AB CD)
*/
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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);
if(rv) {
PRINTF("Joined multicast group ");
PRINT6ADDR(&uip_ds6_maddr_lookup(&addr)->ipaddr);
PRINTF("\n");
}
return rv;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(mcast_sink_process, ev, data)
{
PROCESS_BEGIN();
PRINTF("Multicast Engine: '%s'\n", UIP_MCAST6.name);
if(join_mcast_group() == NULL) {
PRINTF("Failed to join multicast group\n");
PROCESS_EXIT();
}
count = 0;
sink_conn = udp_new(NULL, UIP_HTONS(0), NULL);
udp_bind(sink_conn, UIP_HTONS(MCAST_SINK_UDP_PORT));
PRINTF("Listening: ");
PRINT6ADDR(&sink_conn->ripaddr);
PRINTF(" local/remote port %u/%u\n",
UIP_HTONS(sink_conn->lport), UIP_HTONS(sink_conn->rport));
while(1) {
PROCESS_YIELD();
if(ev == tcpip_event) {
tcpip_handler();
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/