batman-adv: Fix multicast packet loss with a single WANT_ALL_IPV4/6 flag
[ Upstream commitpull/10/head74c12c630f
] 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:687937ab34
("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>
parent
73ecd80bca
commit
5f8156fd34
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@ -540,8 +540,8 @@ update:
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bat_priv->mcast.enabled = true;
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}
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return !(mcast_data.flags &
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(BATADV_MCAST_WANT_ALL_IPV4 | BATADV_MCAST_WANT_ALL_IPV6));
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return !(mcast_data.flags & BATADV_MCAST_WANT_ALL_IPV4 &&
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mcast_data.flags & BATADV_MCAST_WANT_ALL_IPV6);
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}
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/**
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