session: set fifo's session index before vcl attach

Current implementation may have timing issue:

1. The TCP 3-way-handshake is completed but the app is busy and
   does not process the CONNECTED event.
2. VPP receive some data from peer and try to send a RX event to
   VCL, but the fifo's client session index is not initialized yet.
   So this event will be sent to incorrect session 0.

Type: fix

Change-Id: I54f222232968bfaea5f4745284a1cfacc89482a9
Signed-off-by: liuyacan <liuyacan@corp.netease.com>

diff --git a/src/vnet/session/session_api.c b/src/vnet/session/session_api.c
index 5910cd3..f54a46b 100644 (file)
--- a/src/vnet/session/session_api.c
+++ b/src/vnet/session/session_api.c
@@ -303,6 +303,8 @@ mq_send_session_connected_cb (u32 app_wrk_index, u32 api_context,
       m.server_rx_fifo = fifo_segment_fifo_offset (s->rx_fifo);
       m.server_tx_fifo = fifo_segment_fifo_offset (s->tx_fifo);
       m.segment_handle = session_segment_handle (s);
+      s->rx_fifo->shr->client_session_index = api_context;
+      s->tx_fifo->shr->client_session_index = api_context;
     }
   else
     {