openwrtv3/target
Felix Fietkau 2416e506f5 kernel: bridge, multicast-to-unicast: fix echoes on STA
Currently, multicast packets from an STA are sent to any according
multicast listener directly through the bridge multicast-to-unicast
feature. Unfortunately, so far this includes the originating STA, too,
resulting in multicast packets being echo'ed back to the originating STA
if it itself is a multicast listener for that group.

This behaviour breaks IPv6 duplicate address detection: An IPv6 Neighbor
Solicitation for IPv6 Duplicate Address Detection is being echo'ed back,
resulting in the host falsely detecting an address collision, which
makes the node unable to claim an IPv6 address and use IPv6 in general.

Mac80211 unfortunately only prevents the echoes for us for multicast
frames. For the multicast frames cast to a unicast destination we'll
need to take care of excluding the originator ourselves.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>

SVN-Revision: 46765
2015-09-02 09:23:59 +00:00
..
imagebuilder build: Prevent more gzip timestamps 2015-07-14 09:57:45 +00:00
linux kernel: bridge, multicast-to-unicast: fix echoes on STA 2015-09-02 09:23:59 +00:00
sdk sdk: provide explicit CONFIG_MODULES kconfig symbol 2015-07-27 23:45:15 +00:00
toolchain toolchain: respect CONFIG_VERSION_FILENAMES and add host system suffix 2015-02-07 21:01:37 +00:00
Config.in build: remove obsolete references to cris and avr32 2015-03-24 10:07:40 +00:00
Makefile