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[SCTP]: Force update of the rto when processing HB-ACK 

When processing a HEARTBEAT-ACK it's possible that the transport rto
timers will not be updated because a prior T3-RTX processing would
have cleared the rto_pending flag on the transport.  However, if
we received a valid HEARTBEAT-ACK, we want to force update the
rto variables, so re-set the rto_pending flag before calling
sctp_transport_update_rto().

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2007-01-30 14:36:14 -08:00 committed by David S. Miller
parent 29556526b9
commit e533ca16f3
1 changed files with 6 additions and 0 deletions
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6
net/sctp/sm_sideeffect.c
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@ -621,7 +621,13 @@ static void sctp_cmd_transport_on(sctp_cmd_seq_t *cmds,
/* The receiver of the HEARTBEAT ACK should also perform an /* The receiver of the HEARTBEAT ACK should also perform an
* RTT measurement for that destination transport address * RTT measurement for that destination transport address
* using the time value carried in the HEARTBEAT ACK chunk. * using the time value carried in the HEARTBEAT ACK chunk.
* If the transport's rto_pending variable has been cleared,
* it was most likely due to a retransmit. However, we want
* to re-enable it to properly update the rto.
*/ */
if (t->rto_pending == 0)
t->rto_pending = 1;
hbinfo = (sctp_sender_hb_info_t *) chunk->skb->data; hbinfo = (sctp_sender_hb_info_t *) chunk->skb->data;
sctp_transport_update_rto(t, (jiffies - hbinfo->sent_at)); sctp_transport_update_rto(t, (jiffies - hbinfo->sent_at));