Commit e533ca16 authored Jan 30, 2007 by Vlad Yasevich Committed by David S. Miller Jan 30, 2007

[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>

parent 29556526

net/sctp/sm_sideeffect.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -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
		* RTT measurement for that destination transport address
		* 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;
		sctp_transport_update_rto(t, (jiffies - hbinfo->sent_at));