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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-01-31 01:36:14 +0300
committerDavid S. Miller <davem@davemloft.net>2007-01-31 01:36:14 +0300
commite533ca16f31f9e5abfaf5d8c7dbe7095f01474b6 (patch)
treeac08e7242f36a9273488325c652629373cf277c2 /net/sctp
parent29556526b970c2e7d4ca808b6082c33981adfdff (diff)
downloadlinux-e533ca16f31f9e5abfaf5d8c7dbe7095f01474b6.tar.xz
[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>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/sm_sideeffect.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 8bd30976cdee..6db77d1329f7 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -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));