Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3de96471 authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by David S. Miller
Browse files

[TCP]: Wrap-safed reordering detection FRTO check 



In case somebody has a suggestion about a better place for this
check, which must guarantee execution "early enough" (i.e,
before the wrap can occur), I'm very open to them.

Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0e835331

net/ipv4/tcp_input.c

+3 −0
Original line number Diff line number Diff line
@@ -3027,6 +3027,9 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) 
	/* See if we can take anything off of the retransmit queue. */

	flag |= tcp_clean_rtx_queue(sk, &seq_rtt);



	/* Guarantee sacktag reordering detection against wrap-arounds */

	if (before(tp->frto_highmark, tp->snd_una))

		tp->frto_highmark = 0;

	if (tp->frto_counter)

		frto_cwnd = tcp_process_frto(sk, flag);