IPv6 Multicast Example

2012-12-14 15:44:46 +00:00 · 2012-12-14 15:44:46 +00:00 · 0bbb574689
commit 0bbb574689
parent 230881df44
6 changed files with 708 additions and 0 deletions
--- a/examples/ipv6/multicast/sink.c
+++ b/examples/ipv6/multicast/sink.c
@ -0,0 +1,136 @@
+/*
+ * 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 !UIP_CONF_IPV6 || !UIP_CONF_ROUTER || !UIP_CONF_IPV6_MULTICAST || !UIP_CONF_IPV6_RPL
+#error "This example can not work with the current contiki configuration"
+#error "Check the values of: UIP_CONF_IPV6, UIP_CONF_ROUTER, UIP_CONF_IPV6_RPL"
+#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 *
+join_mcast_group()
+{
+  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)
+   */
+  uip_ip6addr(&addr,0xFF1E,0,0,0,0,0,0x89,0xABCD);
+  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();
+}
+/*---------------------------------------------------------------------------*/