Commit e4c78840 authored Mar 21, 2008 by Patrick McManus Committed by David S. Miller Mar 21, 2008

[TCP]: TCP_DEFER_ACCEPT updates - dont retxmt synack



a socket in LISTEN that had completed its 3 way handshake, but not notified
userspace because of SO_DEFER_ACCEPT, would retransmit the already
acked syn-ack during the time it was waiting for the first data byte
from the peer.

Signed-off-by: Patrick McManus <mcmanus@ducksong.com>
Acked-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 539fae89

net/ipv4/inet_connection_sock.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -461,8 +461,9 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
		reqp=&lopt->syn_table[i];
		while ((req = *reqp) != NULL) {
		if (time_after_eq(now, req->expires)) {
		if ((req->retrans < (inet_rsk(req)->acked ? max_retries : thresh))
		&& !req->rsk_ops->rtx_syn_ack(parent, req)) {
		if ((req->retrans < (inet_rsk(req)->acked ? max_retries : thresh)) &&
		(inet_rsk(req)->acked \|\|
		!req->rsk_ops->rtx_syn_ack(parent, req))) {
		unsigned long timeo;

		if (req->retrans++ == 0)