Date: Wed, 4 Mar 2009 03:40:03 +0000 (UTC) From: Bruce M Simpson <bms@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r189357 - head/sys/netinet Message-ID: <200903040340.n243e3sm030858@svn.freebsd.org>
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Author: bms Date: Wed Mar 4 03:40:02 2009 New Revision: 189357 URL: http://svn.freebsd.org/changeset/base/189357 Log: Add sysctl net.inet.ip.mcast.loop. This controls whether or not IPv4 multicast sends are looped back to senders by default on a stack-wide basis, rather than relying on the socket option. Note that the sysctl only applies to newly created multicast sockets. Modified: head/sys/netinet/in_mcast.c Modified: head/sys/netinet/in_mcast.c ============================================================================== --- head/sys/netinet/in_mcast.c Wed Mar 4 03:38:51 2009 (r189356) +++ head/sys/netinet/in_mcast.c Wed Mar 4 03:40:02 2009 (r189357) @@ -121,6 +121,13 @@ static int inp_leave_group(struct inpcb static int inp_set_multicast_if(struct inpcb *, struct sockopt *); static int inp_set_source_filters(struct inpcb *, struct sockopt *); +SYSCTL_NODE(_net_inet_ip, OID_AUTO, mcast, CTLFLAG_RW, 0, "IPv4 multicast"); + +int in_mcast_loop = IP_DEFAULT_MULTICAST_LOOP; +SYSCTL_INT(_net_inet_ip_mcast, OID_AUTO, loop, CTLFLAG_RW | CTLFLAG_TUN, + &in_mcast_loop, 0, "Loopback multicast datagrams by default"); +TUNABLE_INT("net.inet.ip.mcast.loop", &in_mcast_loop); + /* * Resize the ip_moptions vector to the next power-of-two minus 1. * May be called with locks held; do not sleep. @@ -695,7 +702,7 @@ inp_findmoptions(struct inpcb *inp) imo->imo_multicast_addr.s_addr = INADDR_ANY; imo->imo_multicast_vif = -1; imo->imo_multicast_ttl = IP_DEFAULT_MULTICAST_TTL; - imo->imo_multicast_loop = IP_DEFAULT_MULTICAST_LOOP; + imo->imo_multicast_loop = in_mcast_loop; imo->imo_num_memberships = 0; imo->imo_max_memberships = IP_MIN_MEMBERSHIPS; imo->imo_membership = immp;
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