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| author | David L Stevens <dlstevens@us.ibm.com> | 2005-07-08 17:39:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-07-08 17:39:23 -0700 |
| commit | 8cdaaa15da58806ac3c75d96c40aef9e31445a25 (patch) | |
| tree | bdeee63b026525963143d3ffe07d93110c25297c /net/ipv4/ip_sockglue.c | |
| parent | ca9b907d140a5f249250d19f956129dbbbf84f73 (diff) | |
| download | linux-stable-8cdaaa15da58806ac3c75d96c40aef9e31445a25.tar.gz linux-stable-8cdaaa15da58806ac3c75d96c40aef9e31445a25.tar.bz2 linux-stable-8cdaaa15da58806ac3c75d96c40aef9e31445a25.zip | |
[IPV4]: multicast API "join" issues
1) Changes IP_ADD_SOURCE_MEMBERSHIP and MCAST_JOIN_SOURCE_GROUP to ignore
EADDRINUSE errors on a "courtesy join" -- prior membership or not
is ok for these.
2) Adds "leave group" equivalence of (INCLUDE, empty) filters in the
delta-based API. Without this, mixing delta-based API calls that
end in an (INCLUDE, empty) filter would not allow a subsequent
regular IP_ADD_MEMBERSHIP. It also frees socket buffer memory that
isn't needed for both the multicast group record and source filter.
Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_sockglue.c')
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index f8b172f89811..fc7c481d0d79 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; |