Make tcp active open data structures thread safe

[vpp.git] / src / vnet / tcp / tcp_output.c

diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 5e9ecf1..1ecb6ce 100644 (file)
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -1087,15 +1087,14 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn)
   if (is_syn)
     {
       tc = tcp_half_open_connection_get (index);
+      tc->timers[TCP_TIMER_RETRANSMIT_SYN] = TCP_TIMER_HANDLE_INVALID;
     }
   else
     {
       tc = tcp_connection_get (index, thread_index);
+      tc->timers[TCP_TIMER_RETRANSMIT] = TCP_TIMER_HANDLE_INVALID;
     }
 
-  /* Make sure timer handle is set to invalid */
-  tc->timers[TCP_TIMER_RETRANSMIT] = TCP_TIMER_HANDLE_INVALID;
-
   if (!tcp_in_recovery (tc) && tc->rto_boff > 0
       && tc->state >= TCP_STATE_ESTABLISHED)
     {
@@ -1154,6 +1153,20 @@ tcp_timer_retransmit_handler_i (u32 index, u8 is_syn)
   /* Retransmit for SYN/SYNACK */
   else if (tc->state == TCP_STATE_SYN_RCVD || tc->state == TCP_STATE_SYN_SENT)
     {
+      /* Half-open connection actually moved to established but we were
+       * waiting for syn retransmit to pop to call cleanup from the right
+       * thread. */
+      if (tc->flags & TCP_CONN_HALF_OPEN_DONE)
+       {
+         ASSERT (tc->state == TCP_STATE_SYN_SENT);
+         if (tcp_half_open_connection_cleanup (tc))
+           {
+             clib_warning ("could not remove half-open connection");
+             ASSERT (0);
+           }
+         return;
+       }
+
       /* Try without increasing RTO a number of times. If this fails,
        * start growing RTO exponentially */
       if (tc->rto_boff > TCP_RTO_SYN_RETRIES)