diff options
| author |   Yuchung Cheng <ycheng@google.com> | 2019-04-29 15:46:15 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-05-01 11:47:54 -0400 |
| commit | 9e450c1ecb027417c99eba651413d2a6ba6ffc1f (patch) | |
| tree | f399effe5bad9cdffefb6485555f269016233c71 /net/ipv4/tcp_input.c | |
| parent | tcp: undo initial congestion window on false SYN timeout (diff) | |
| download | linux-dev-9e450c1ecb027417c99eba651413d2a6ba6ffc1f.tar.xz linux-dev-9e450c1ecb027417c99eba651413d2a6ba6ffc1f.zip | |
tcp: better SYNACK sent timestamp
Detecting spurious SYNACK timeout using timestamp option requires
recording the exact SYNACK skb timestamp. Previously the SYNACK
sent timestamp was stamped slightly earlier before the skb
was transmitted. This patch uses the SYNACK skb transmission
timestamp directly.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 695f840acc14..30c6a42b1f5b 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -6319,7 +6319,7 @@ static void tcp_openreq_init(struct request_sock *req, req->cookie_ts = 0; tcp_rsk(req)->rcv_isn = TCP_SKB_CB(skb)->seq; tcp_rsk(req)->rcv_nxt = TCP_SKB_CB(skb)->seq + 1; - tcp_rsk(req)->snt_synack = tcp_clock_us(); + tcp_rsk(req)->snt_synack = 0; tcp_rsk(req)->last_oow_ack_time = 0; req->mss = rx_opt->mss_clamp; req->ts_recent = rx_opt->saw_tstamp ? rx_opt->rcv_tsval : 0; |