From: Xin Long <lucien....@gmail.com> Date: Fri, 17 Feb 2017 16:41:45 +0800
> Now when sending a packet, sctp_transport_dst_check will check if dst > is obsolete by calling ipv4/ip6_dst_check. But they return obsolete > only when adding a new cache, after that when the cache's pmtu is > updated again, it will not trigger transport->dst/pmtu's update. > > It can be reproduced by reducing route's pmtu twice. At the 1st time > client will add a new cache, and transport->pathmtu gets updated as > sctp_transport_dst_check finds it's obsolete. But at the 2nd time, > cache's mtu is updated, sctp client will never send out any packet, > because transport->pmtu has no chance to update. > > This patch is to fix this by also checking if transport pmtu is dst > mtu in sctp_transport_dst_check, so that transport->pmtu can be > updated on time. > > Signed-off-by: Xin Long <lucien....@gmail.com> Applied.
