2 * The olsr.org Optimized Link-State Routing daemon(olsrd)
3 * Copyright (c) 2004-2009, the olsr.org team - see HISTORY file
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
16 * * Neither the name of olsr.org, olsrd nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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31 * POSSIBILITY OF SUCH DAMAGE.
33 * Visit http://www.olsr.org for more information.
35 * If you find this software useful feel free to make a donation
36 * to the project. For more information see the website or contact
37 * the copyright holders.
45 #include <stddef.h> /* NULL */
46 #include <string.h> /* strcmp */
47 #include <assert.h> /* assert() */
48 #include <netinet/ip.h> /* struct ip */
49 #include <netinet/udp.h> /* struct udphdr */
52 #include "defs.h" /* ipequal */
53 #include "olsr_protocol.h" /* OLSRPORT */
56 #include "mdns.h" /* BMF_ENCAP_PORT */
57 #include "NetworkInterfaces.h" /* TBmfInterface */
59 /* Whether or not to flood local broadcast packets (e.g. packets with IP
60 * destination 192.168.1.255). May be overruled by setting the plugin
61 * parameter "DoLocalBroadcast" to "no" */
62 //int EnableLocalBroadcast = 1;
64 /* -------------------------------------------------------------------------
65 * Function : IsMulticast
66 * Description: Check if an IP address is a multicast address
69 * Return : true (1) or false (0)
71 * ------------------------------------------------------------------------- */
73 IsMulticast(union olsr_ip_addr *ipAddress)
75 assert(ipAddress != NULL);
77 return (ntohl(ipAddress->v4.s_addr) & 0xF0000000) == 0xE0000000;