diff options
Diffstat (limited to 'src/vnet/tcp/tcp_output.c')
| -rw-r--r-- | src/vnet/tcp/tcp_output.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c index c56eadf8fdd..0255551318a 100644 --- a/src/vnet/tcp/tcp_output.c +++ b/src/vnet/tcp/tcp_output.c @@ -1452,15 +1452,29 @@ tcp_timer_persist_handler (u32 index) /* Make sure timer handle is set to invalid */ tc->timers[TCP_TIMER_PERSIST] = TCP_TIMER_HANDLE_INVALID; - offset = tc->snd_una_max - tc->snd_una; /* Problem already solved or worse */ - available_bytes = stream_session_tx_fifo_max_dequeue (&tc->connection); if (tc->state == TCP_STATE_CLOSED || tc->state > TCP_STATE_ESTABLISHED - || tc->snd_wnd > tc->snd_mss || tcp_in_recovery (tc) - || !available_bytes || available_bytes <= offset) + || tc->snd_wnd > tc->snd_mss || tcp_in_recovery (tc)) return; + available_bytes = stream_session_tx_fifo_max_dequeue (&tc->connection); + offset = tc->snd_una_max - tc->snd_una; + + /* Reprogram persist if no new bytes available to send. We may have data + * next time */ + if (!available_bytes) + { + tcp_persist_timer_set (tc); + return; + } + + if (available_bytes <= offset) + { + ASSERT (tcp_timer_is_active (tc, TCP_TIMER_RETRANSMIT)); + return; + } + /* Increment RTO backoff */ tc->rto_boff += 1; tc->rto = clib_min (tc->rto << 1, TCP_RTO_MAX); |