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authorDavid L Stevens <dlstevens@us.ibm.com>2005-07-08 17:39:23 -0700
committerDavid S. Miller <davem@davemloft.net>2005-07-08 17:39:23 -0700
commit8cdaaa15da58806ac3c75d96c40aef9e31445a25 (patch)
treebdeee63b026525963143d3ffe07d93110c25297c /net/ipv4/ip_sockglue.c
parentca9b907d140a5f249250d19f956129dbbbf84f73 (diff)
[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.c6
1 files changed, 3 insertions, 3 deletions
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;