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sctp: Don't lookup dst if transport dst is still valid
When sctp sits on IPv6, sctp_transport_dst_check pass cookie as ZERO, as a result ip6_dst_check always fail out. This behaviour makes transport->dst useless, because every sctp_packet_transmit must look for valid dst. Add a dst_cookie into sctp_transport, and set the cookie whenever we get new dst for sctp_transport. So dst validness could be checked against it. Since I have split genid for IPv4 and IPv6, also delete/add IPv6 address will also bump IPv6 genid. So issues we discussed in: http://marc.info/?l=linux-netdev&m=137404469219410&w=4 have all been sloved for this patch. Signed-off-by: Fan Du <fan.du@windriver.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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3 changed files with 3 additions and 2 deletions
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@ -946,6 +946,7 @@ struct sctp_transport {
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__u64 hb_nonce;
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struct rcu_head rcu;
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u32 dst_cookie;
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};
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struct sctp_transport *sctp_transport_new(struct net *, const union sctp_addr *,
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