diff options
Diffstat (limited to 'src/vnet/tcp/tcp.c')
| -rw-r--r-- | src/vnet/tcp/tcp.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c index e80e2ec9b7c..224ee0dd160 100644 --- a/src/vnet/tcp/tcp.c +++ b/src/vnet/tcp/tcp.c @@ -331,7 +331,7 @@ void tcp_connection_init_vars (tcp_connection_t * tc) { tcp_connection_timers_init (tc); - tcp_set_snd_mss (tc); + tcp_init_mss (tc); scoreboard_init (&tc->sack_sb); tcp_cc_init (tc); } @@ -560,10 +560,23 @@ tcp_half_open_session_get_transport (u32 conn_index) return &tc->connection; } +/** + * Compute maximum segment size for session layer. + * + * Since the result needs to be the actual data length, it first computes + * the tcp options to be used in the next burst and subtracts their + * length from the connection's snd_mss. + */ u16 tcp_session_send_mss (transport_connection_t * trans_conn) { tcp_connection_t *tc = (tcp_connection_t *) trans_conn; + + /* Ensure snd_mss does accurately reflect the amount of data we can push + * in a segment. This also makes sure that options are updated according to + * the current state of the connection. */ + tcp_update_snd_mss (tc); + return tc->snd_mss; } @@ -607,7 +620,7 @@ tcp_session_send_space (transport_connection_t * trans_conn) tc->snd_nxt = tc->snd_una_max; snd_space = tcp_available_wnd (tc) - tc->rtx_bytes - (tc->snd_una_max - tc->snd_congestion); - if (snd_space <= 0) + if (snd_space <= 0 || (tc->snd_una_max - tc->snd_una) >= tc->snd_wnd) return 0; return tcp_round_snd_space (tc, snd_space); } |