diff options
Diffstat (limited to 'src/vnet/tcp/tcp.c')
| -rw-r--r-- | src/vnet/tcp/tcp.c | 80 |
1 files changed, 44 insertions, 36 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c index 8c8df00f098..4a63f3bc00c 100644 --- a/src/vnet/tcp/tcp.c +++ b/src/vnet/tcp/tcp.c @@ -172,7 +172,7 @@ tcp_half_open_connection_cleanup (tcp_connection_t * tc) /* Make sure this is the owning thread */ if (tc->c_thread_index != vlib_get_thread_index ()) return 1; - tcp_timer_reset (tc, TCP_TIMER_ESTABLISH); + tcp_timer_reset (tc, TCP_TIMER_ESTABLISH_AO); tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT_SYN); tcp_half_open_connection_del (tc); return 0; @@ -308,6 +308,8 @@ tcp_connection_reset (tcp_connection_t * tc) break; case TCP_STATE_CLOSED: break; + default: + TCP_DBG ("reset state: %u", tc->state); } } @@ -333,7 +335,9 @@ tcp_connection_close (tcp_connection_t * tc) switch (tc->state) { case TCP_STATE_SYN_SENT: - /* Do nothing. Establish timer will pop and cleanup the connection */ + /* Try to cleanup. If not on the right thread, mark as half-open done. + * Connection will be cleaned up when establish timer pops */ + tcp_connection_cleanup (tc); break; case TCP_STATE_SYN_RCVD: tcp_connection_timers_reset (tc); @@ -349,7 +353,8 @@ tcp_connection_close (tcp_connection_t * tc) tcp_connection_set_state (tc, TCP_STATE_FIN_WAIT_1); /* Set a timer in case the peer stops responding. Otherwise the * connection will be stuck here forever. */ - tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_FINWAIT1_TIME); + ASSERT (tc->timers[TCP_TIMER_WAITCLOSE] == TCP_TIMER_HANDLE_INVALID); + tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, TCP_FINWAIT1_TIME); break; case TCP_STATE_CLOSE_WAIT: if (!session_tx_fifo_max_dequeue (&tc->connection)) @@ -367,17 +372,14 @@ tcp_connection_close (tcp_connection_t * tc) break; case TCP_STATE_CLOSED: tcp_connection_timers_reset (tc); + /* Delete connection but instead of doing it now wait until next + * dispatch cycle to give the session layer a chance to clear + * unhandled events */ + tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); break; default: TCP_DBG ("state: %u", tc->state); } - - /* If in CLOSED and WAITCLOSE timer is not set, delete connection. - * But instead of doing it now wait until next dispatch cycle to give - * the session layer a chance to clear unhandled events */ - if (!tcp_timer_is_active (tc, TCP_TIMER_WAITCLOSE) - && tc->state == TCP_STATE_CLOSED) - tcp_timer_update (tc, TCP_TIMER_WAITCLOSE, TCP_CLEANUP_TIME); } static void @@ -393,9 +395,7 @@ tcp_session_cleanup (u32 conn_index, u32 thread_index) { tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); - tcp_connection_timers_reset (tc); - tc->state = TCP_STATE_CLOSED; - TCP_EVT_DBG (TCP_EVT_STATE_CHANGE, tc); + tcp_connection_set_state (tc, TCP_STATE_CLOSED); tcp_connection_cleanup (tc); } @@ -1217,39 +1217,45 @@ tcp_timer_establish_handler (u32 conn_index) { tcp_connection_t *tc; - tc = tcp_half_open_connection_get (conn_index); - if (tc) - { - ASSERT (tc->state == TCP_STATE_SYN_SENT); - /* Notify app if we haven't tried to clean this up already */ - if (!(tc->flags & TCP_CONN_HALF_OPEN_DONE)) - session_stream_connect_notify (&tc->connection, 1 /* fail */ ); - } - else - { - tc = tcp_connection_get (conn_index, vlib_get_thread_index ()); - /* note: the connection may have already disappeared */ - if (PREDICT_FALSE (tc == 0)) - return; - ASSERT (tc->state == TCP_STATE_SYN_RCVD); - /* Start cleanup. App wasn't notified yet so use delete notify as - * opposed to delete to cleanup session layer state. */ - stream_session_delete_notify (&tc->connection); - } + tc = tcp_connection_get (conn_index, vlib_get_thread_index ()); + /* note: the connection may have already disappeared */ + if (PREDICT_FALSE (tc == 0)) + return; + ASSERT (tc->state == TCP_STATE_SYN_RCVD); + /* Start cleanup. App wasn't notified yet so use delete notify as + * opposed to delete to cleanup session layer state. */ + stream_session_delete_notify (&tc->connection); tc->timers[TCP_TIMER_ESTABLISH] = TCP_TIMER_HANDLE_INVALID; tcp_connection_cleanup (tc); } static void +tcp_timer_establish_ao_handler (u32 conn_index) +{ + tcp_connection_t *tc; + + tc = tcp_half_open_connection_get (conn_index); + if (!tc) + return; + + ASSERT (tc->state == TCP_STATE_SYN_SENT); + /* Notify app if we haven't tried to clean this up already */ + if (!(tc->flags & TCP_CONN_HALF_OPEN_DONE)) + session_stream_connect_notify (&tc->connection, 1 /* fail */ ); + + tc->timers[TCP_TIMER_ESTABLISH_AO] = TCP_TIMER_HANDLE_INVALID; + tcp_connection_cleanup (tc); +} + +static void tcp_timer_waitclose_handler (u32 conn_index) { - u32 thread_index = vlib_get_thread_index (); + u32 thread_index = vlib_get_thread_index (), rto; tcp_connection_t *tc; tc = tcp_connection_get (conn_index, thread_index); if (!tc) return; - tc->timers[TCP_TIMER_WAITCLOSE] = TCP_TIMER_HANDLE_INVALID; switch (tc->state) @@ -1287,8 +1293,9 @@ tcp_timer_waitclose_handler (u32 conn_index) * is closed. We haven't sent everything but we did try. */ tcp_cong_recovery_off (tc); tcp_send_fin (tc); + rto = clib_max (tc->rto >> tc->rto_boff, 1); tcp_timer_set (tc, TCP_TIMER_WAITCLOSE, - clib_max (tc->rto * TCP_TO_TIMER_TICK, 1)); + clib_min (rto * TCP_TO_TIMER_TICK, TCP_2MSL_TIME)); session_stream_close_notify (&tc->connection); } else @@ -1321,7 +1328,8 @@ static timer_expiration_handler *timer_expiration_handlers[TCP_N_TIMERS] = tcp_timer_keep_handler, tcp_timer_waitclose_handler, tcp_timer_retransmit_syn_handler, - tcp_timer_establish_handler + tcp_timer_establish_handler, + tcp_timer_establish_ao_handler, }; /* *INDENT-ON* */ |