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Diffstat (limited to 'net/dccp/timer.c')
-rw-r--r--net/dccp/timer.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/dccp/timer.c b/net/dccp/timer.c
index aa34b576e228..d7c786608ec6 100644
--- a/net/dccp/timer.c
+++ b/net/dccp/timer.c
@@ -141,6 +141,17 @@ static void dccp_retransmit_timer(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
+ /* retransmit timer is used for feature negotiation throughout
+ * connection. In this case, no packet is re-transmitted, but rather an
+ * ack is generated and pending changes are splaced into its options.
+ */
+ if (sk->sk_send_head == NULL) {
+ dccp_pr_debug("feat negotiation retransmit timeout %p\n", sk);
+ if (sk->sk_state == DCCP_OPEN)
+ dccp_send_ack(sk);
+ goto backoff;
+ }
+
/*
* sk->sk_send_head has to have one skb with
* DCCP_SKB_CB(skb)->dccpd_type set to one of the retransmittable DCCP
@@ -177,6 +188,7 @@ static void dccp_retransmit_timer(struct sock *sk)
goto out;
}
+backoff:
icsk->icsk_backoff++;
icsk->icsk_retransmits++;