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42cc2e53 | 1 | |
2 | /* | |
cc192b50 | 3 | * $Id: multicast.cc,v 1.13 2007/12/14 23:11:47 amosjeffries Exp $ |
42cc2e53 | 4 | * |
6f6f0853 | 5 | * DEBUG: section 7 Multicast |
42cc2e53 | 6 | * AUTHOR: Martin Hamilton |
7 | * | |
2b6662ba | 8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 9 | * ---------------------------------------------------------- |
42cc2e53 | 10 | * |
2b6662ba | 11 | * Squid is the result of efforts by numerous individuals from |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
42cc2e53 | 19 | * |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
cbdec147 | 32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 33 | * |
42cc2e53 | 34 | */ |
35 | ||
36 | #include "squid.h" | |
37 | ||
38 | int | |
39 | mcastSetTtl(int fd, int mcast_ttl) | |
40 | { | |
41 | #ifdef IP_MULTICAST_TTL | |
42 | char ttl = (char) mcast_ttl; | |
62e76326 | 43 | |
42cc2e53 | 44 | if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, 1) < 0) |
bf8fe701 | 45 | debugs(50, 1, "comm_set_mcast_ttl: FD " << fd << ", TTL: " << mcast_ttl << ": " << xstrerror()); |
62e76326 | 46 | |
42cc2e53 | 47 | #endif |
62e76326 | 48 | |
42cc2e53 | 49 | return 0; |
50 | } | |
51 | ||
52 | void | |
79d39a72 | 53 | mcastJoinGroups(const ipcache_addrs * ia, void *datanotused) |
42cc2e53 | 54 | { |
55 | #ifdef IP_MULTICAST_TTL | |
56 | int fd = theInIcpConnection; | |
62e76326 | 57 | |
42cc2e53 | 58 | struct ip_mreq mr; |
59 | int i; | |
60 | int x; | |
61 | char c = 0; | |
62e76326 | 62 | |
42cc2e53 | 63 | if (ia == NULL) { |
bf8fe701 | 64 | debugs(7, 0, "comm_join_mcast_groups: Unknown host"); |
62e76326 | 65 | return; |
42cc2e53 | 66 | } |
62e76326 | 67 | |
42cc2e53 | 68 | for (i = 0; i < (int) ia->count; i++) { |
cc192b50 | 69 | debugs(7, 10, "Listening for ICP requests on " << ia->in_addrs[i] ); |
70 | ||
71 | #if USE_IPV6 | |
72 | if( ! ia->in_addrs[i].IsIPv4() ) { | |
73 | debugs(7, 10, "ERROR: IPv6 Multicast Listen has not been implemented!"); | |
74 | continue; | |
75 | } | |
76 | #endif | |
77 | ||
78 | ia->in_addrs[i].GetInAddr(mr.imr_multiaddr); | |
79 | ||
62e76326 | 80 | mr.imr_interface.s_addr = INADDR_ANY; |
81 | x = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, | |
62e76326 | 82 | (char *) &mr, sizeof(struct ip_mreq)); |
83 | ||
84 | if (x < 0) | |
cc192b50 | 85 | debugs(7, 1, "comm_join_mcast_groups: FD " << fd << ", IP=" << ia->in_addrs[i]); |
62e76326 | 86 | |
87 | x = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &c, 1); | |
88 | ||
89 | if (x < 0) | |
bf8fe701 | 90 | debugs(7, 1, "Can't disable multicast loopback: " << xstrerror()); |
42cc2e53 | 91 | } |
62e76326 | 92 | |
42cc2e53 | 93 | #endif |
94 | } |