/* * $Id: multicast.c,v 1.9.8.1 2008/05/04 23:23:13 hno Exp $ * * DEBUG: section 7 Multicast * AUTHOR: Martin Hamilton * * SQUID Web Proxy Cache http://www.squid-cache.org/ * ---------------------------------------------------------- * * Squid is the result of efforts by numerous individuals from * the Internet community; see the CONTRIBUTORS file for full * details. Many organizations have provided support for Squid's * development; see the SPONSORS file for full details. Squid is * Copyrighted (C) 2001 by the Regents of the University of * California; see the COPYRIGHT file for full details. Squid * incorporates software developed and/or copyrighted by other * sources; see the CREDITS file for full details. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. * */ #include "squid.h" int mcastSetTtl(int fd, int mcast_ttl) { #ifdef IP_MULTICAST_TTL char ttl = (char) mcast_ttl; if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, 1) < 0) debug(50, 1) ("mcastSetTtl: FD %d, TTL: %d: %s\n", fd, mcast_ttl, xstrerror()); #endif return 0; } void mcastJoinGroups(const ipcache_addrs * ia, void *datanotused) { #ifdef IP_MULTICAST_TTL int fd = theInIcpConnection; struct ip_mreq mr; int i; int x; char c = 0; if (ia == NULL) { debug(7, 0) ("mcastJoinGroups: Unknown host\n"); return; } for (i = 0; i < (int) ia->count; i++) { debug(7, 10) ("Listening for ICP requests on %s\n", inet_ntoa(*(ia->in_addrs + i))); mr.imr_multiaddr.s_addr = (ia->in_addrs + i)->s_addr; mr.imr_interface.s_addr = INADDR_ANY; x = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &mr, sizeof(struct ip_mreq)); if (x < 0) debug(7, 1) ("mcastJoinGroups: FD %d, [%s]\n", fd, inet_ntoa(*(ia->in_addrs + i))); x = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &c, 1); if (x < 0) debug(7, 1) ("Can't disable multicast loopback: %s\n", xstrerror()); } #endif }