diff options
| author | Linus Lüssing <linus.luessing@c0d3.blue> | 2018-03-04 13:08:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-30 07:52:11 +0200 |
| commit | 5f8156fd34cf7d10a70f147130bc565857621732 (patch) | |
| tree | 058210a6764edcadb093eb456b52383a81716255 /net/batman-adv | |
| parent | 73ecd80bca2bab39fd926aadf2a0665ee25e026e (diff) | |
batman-adv: Fix multicast packet loss with a single WANT_ALL_IPV4/6 flag
[ Upstream commit 74c12c630fe310eb7fcae1b292257d47781fff0a ]
As the kernel doc describes too the code is supposed to skip adding
multicast TT entries if both the WANT_ALL_IPV4 and WANT_ALL_IPV6 flags
are present.
Unfortunately, the current code even skips adding multicast TT entries
if only either the WANT_ALL_IPV4 or WANT_ALL_IPV6 is present.
This could lead to IPv6 multicast packet loss if only an IGMP but not an
MLD querier is present for instance or vice versa.
Fixes: 687937ab3489 ("batman-adv: Add multicast optimization support for bridged setups")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/batman-adv')
| -rw-r--r-- | net/batman-adv/multicast.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c index d327670641ac..df9e114d92d0 100644 --- a/net/batman-adv/multicast.c +++ b/net/batman-adv/multicast.c @@ -540,8 +540,8 @@ update: bat_priv->mcast.enabled = true; } - return !(mcast_data.flags & - (BATADV_MCAST_WANT_ALL_IPV4 | BATADV_MCAST_WANT_ALL_IPV6)); + return !(mcast_data.flags & BATADV_MCAST_WANT_ALL_IPV4 && + mcast_data.flags & BATADV_MCAST_WANT_ALL_IPV6); } /** |