diff options
Diffstat (limited to 'src/vnet/tcp/tcp.c')
| -rw-r--r-- | src/vnet/tcp/tcp.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c index 938a863238f..1563be4eb86 100644 --- a/src/vnet/tcp/tcp.c +++ b/src/vnet/tcp/tcp.c @@ -925,17 +925,21 @@ tcp_snd_space_inline (tcp_connection_t * tc) * to force the peer to send enough dupacks to start retransmitting as * per Limited Transmit (RFC3042) */ - if (PREDICT_FALSE (tc->rcv_dupacks != 0 || tc->sack_sb.sacked_bytes)) + if (PREDICT_FALSE (tc->rcv_dupacks || tc->sack_sb.sacked_bytes)) { - if (tc->limited_transmit != tc->snd_nxt - && (seq_lt (tc->limited_transmit, tc->snd_nxt - 2 * tc->snd_mss) - || seq_gt (tc->limited_transmit, tc->snd_nxt))) + int snt_limited, n_pkts; + + n_pkts = tcp_opts_sack_permitted (&tc->rcv_opts) + ? tc->sack_sb.reorder - 1 : 2; + + if ((seq_lt (tc->limited_transmit, tc->snd_nxt - n_pkts * tc->snd_mss) + || seq_gt (tc->limited_transmit, tc->snd_nxt))) tc->limited_transmit = tc->snd_nxt; ASSERT (seq_leq (tc->limited_transmit, tc->snd_nxt)); - int snt_limited = tc->snd_nxt - tc->limited_transmit; - snd_space = clib_max ((int) 2 * tc->snd_mss - snt_limited, 0); + snt_limited = tc->snd_nxt - tc->limited_transmit; + snd_space = clib_max (n_pkts * tc->snd_mss - snt_limited, 0); } return tcp_round_snd_space (tc, snd_space); } |