• Vlad Yasevich's avatar
    sctp: Fix the RTO-doubling on idle-link heartbeats · faee47cd
    Vlad Yasevich authored
    SCTP incorrectly doubles rto ever time a Hearbeat chunk
    is generated.   However RFC 4960 states:
       On an idle destination address that is allowed to heartbeat, it is
       recommended that a HEARTBEAT chunk is sent once per RTO of that
       destination address plus the protocol parameter 'HB.interval', with
       jittering of +/- 50% of the RTO value, and exponential backoff of the
       RTO if the previous HEARTBEAT is unanswered.
    Essentially, of if the heartbean is unacknowledged, do we double the RTO.
    Signed-off-by: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
structs.h 62.7 KB