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authorNivedita Singhvi <niv@us.ibm.com>2009-05-28 11:00:46 +0400
committerDavid S. Miller <davem@davemloft.net>2009-06-02 11:45:24 +0400
commitf771bef98004d9d141b085d987a77d06669d4f4f (patch)
treedf9b7a353a8c28e71a8237d3ad65ba7f41ffab30 /include/linux/in.h
parent4d52cfbef6266092d535237ba5a4b981458ab171 (diff)
downloadlinux-f771bef98004d9d141b085d987a77d06669d4f4f.tar.xz
ipv4: New multicast-all socket option
After some discussion offline with Christoph Lameter and David Stevens regarding multicast behaviour in Linux, I'm submitting a slightly modified patch from the one Christoph submitted earlier. This patch provides a new socket option IP_MULTICAST_ALL. In this case, default behaviour is _unchanged_ from the current Linux standard. The socket option is set by default to provide original behaviour. Sockets wishing to receive data only from multicast groups they join explicitly will need to clear this socket option. Signed-off-by: Nivedita Singhvi <niv@us.ibm.com> Signed-off-by: Christoph Lameter<cl@linux.com> Acked-by: David Stevens <dlstevens@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/in.h')
-rw-r--r--include/linux/in.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/in.h b/include/linux/in.h
index d60122a3a088..cf196da04ec9 100644
--- a/include/linux/in.h
+++ b/include/linux/in.h
@@ -107,6 +107,7 @@ struct in_addr {
#define MCAST_JOIN_SOURCE_GROUP 46
#define MCAST_LEAVE_SOURCE_GROUP 47
#define MCAST_MSFILTER 48
+#define IP_MULTICAST_ALL 49
#define MCAST_EXCLUDE 0
#define MCAST_INCLUDE 1