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[IGMP]: workaround for IGMP v1/v2 bug
authorDavid Stevens <dlstevens@us.ibm.com>
Sat, 3 Dec 2005 04:32:59 +0000 (20:32 -0800)
committerDavid S. Miller <davem@davemloft.net>
Sat, 3 Dec 2005 04:32:59 +0000 (20:32 -0800)
commit09b58c80b3438a65864ae21b52c15925390b59c6
tree17d873b63f0ce24b81e184f2515f2b643143e48etree | snapshot
parentf6406e92d8d0634606f65a37b66d24ee32956d53commit | diff
[IGMP]: workaround for IGMP v1/v2 bug

From: David Stevens <dlstevens@us.ibm.com>

As explained at:

http://www.cs.ucsb.edu/~krishna/igmp_dos/

With IGMP version 1 and 2 it is possible to inject a unicast
report to a client which will make it ignore multicast
reports sent later by the router.

The fix is to only accept the report if is was sent to a
multicast or unicast address.

Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/igmp.c diff | blob | history
net/ipv6/mcast.c diff | blob | history
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