diff options
| author |   Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-10-01 15:28:48 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:54:00 -0700 |
| commit | 3de96471bd7fb76406e975ef6387abe3a0698149 (patch) | |
| tree | e075e0ce74b97d906bdca160fe02b60e3cb9d907 /net | |
| parent | [TCP]: Update comment of SACK block validator (diff) | |
| download | linux-dev-3de96471bd7fb76406e975ef6387abe3a0698149.tar.xz linux-dev-3de96471bd7fb76406e975ef6387abe3a0698149.zip | |
[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: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_input.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index c1339d88bbf3..7c1a92ffa083 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -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); |