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[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>
This commit is contained in:
Patrick McManus 2008-03-21 16:29:22 -07:00 committed by David S. Miller
parent 539fae89be
commit e4c7884028
1 changed files with 3 additions and 2 deletions
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5
net/ipv4/inet_connection_sock.c
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@ -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)