diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/igmp.c | 9 | ||||
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 6 |
2 files changed, 12 insertions, 3 deletions
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 111eb678cba..e21ebe75990 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1724,6 +1724,7 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct struct in_device *in_dev = NULL; struct inet_sock *inet = inet_sk(sk); struct ip_sf_socklist *psl; + int leavegroup = 0; int i, j, rv; if (!MULTICAST(addr)) @@ -1775,6 +1776,12 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct if (rv) /* source not found */ goto done; + /* special case - (INCLUDE, empty) == LEAVE_GROUP */ + if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { + leavegroup = 1; + goto done; + } + /* update the interface filter */ ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, omode, 1, &mreqs->imr_sourceaddr, 1); @@ -1831,6 +1838,8 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct &mreqs->imr_sourceaddr, 1); done: rtnl_shunlock(); + if (leavegroup) + return ip_mc_leave_group(sk, &imr); return err; } diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index f8b172f8981..fc7c481d0d7 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -677,11 +677,11 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, mreq.imr_address.s_addr = mreqs.imr_interface; mreq.imr_ifindex = 0; err = ip_mc_join_group(sk, &mreq); - if (err) + if (err && err != -EADDRINUSE) break; omode = MCAST_INCLUDE; add = 1; - } else /*IP_DROP_SOURCE_MEMBERSHIP */ { + } else /* IP_DROP_SOURCE_MEMBERSHIP */ { omode = MCAST_INCLUDE; add = 0; } @@ -754,7 +754,7 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, mreq.imr_address.s_addr = 0; mreq.imr_ifindex = greqs.gsr_interface; err = ip_mc_join_group(sk, &mreq); - if (err) + if (err && err != -EADDRINUSE) break; greqs.gsr_interface = mreq.imr_ifindex; omode = MCAST_INCLUDE; |