diff options
| author |   Florin Coras <fcoras@cisco.com> | 2019-02-28 12:49:45 -0800 |
|---|---|---|
| committer |   John Lo <loj@cisco.com> | 2019-03-01 23:26:33 +0000 |
| commit | 6342e48dc1aa5a083b34ca6cae26bf3672cd800b (patch) | |
| tree | 6a1b45e4fa60cebe85c40451dad9297270ba9cb3 /src | |
| parent | 46ee286753d10e0afe06fee6121519d57bb50793 (diff) | |
tcp: allow future acks if in window
Change-Id: I84ad1830b8db43f6031cf2876cd94f6a71216b83
Signed-off-by: Florin Coras <fcoras@cisco.com>
(cherry picked from commit 5fd3210be3a043c12c598df3d75dbe0aa606bfe5)
Diffstat (limited to 'src')
| -rw-r--r-- | src/vnet/tcp/tcp_input.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c index f1f945e1092..392d694030e 100644 --- a/src/vnet/tcp/tcp_input.c +++ b/src/vnet/tcp/tcp_input.c @@ -1523,10 +1523,11 @@ tcp_rcv_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b, /* If the ACK acks something not yet sent (SEG.ACK > SND.NXT) */ if (PREDICT_FALSE (seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt))) { - /* When we entered recovery, we reset snd_nxt to snd_una. Seems peer - * still has the data so accept the ack */ - if (tcp_in_recovery (tc) - && seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_congestion)) + /* When we entered cong recovery, we reset snd_nxt to snd_una. Seems + * peer still has the data so accept the ack */ + if (tcp_in_cong_recovery (tc) + && seq_leq (vnet_buffer (b)->tcp.ack_number, + tc->snd_una + tc->snd_wnd)) { tc->snd_nxt = vnet_buffer (b)->tcp.ack_number; if (seq_gt (tc->snd_nxt, tc->snd_una_max)) @@ -1550,6 +1551,10 @@ tcp_rcv_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b, vnet_buffer (b)->tcp.ack_number); tc->snd_nxt = vnet_buffer (b)->tcp.ack_number; + if (seq_gt (tc->snd_nxt, tc->snd_una_max)) + tc->snd_una_max = tc->snd_nxt; + + goto process_ack; } /* If old ACK, probably it's an old dupack */ |