vcl: handle reset while reading/writing data

Change-Id: I73d1dde5b78bbb7835f3a4f0d35fc0d5e46ec103
Signed-off-by: Florin Coras <fcoras@cisco.com>

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 773350a..a456ed0 100644 (file)
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -1551,15 +1551,11 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
          e = svm_msg_q_msg_data (mq, &msg);
          svm_msg_q_unlock (mq);
          if (!vcl_is_rx_evt_for_session (e, s->session_index, is_ct))
-           {
-             vcl_handle_mq_event (wrk, e);
-             svm_msg_q_free_msg (mq, &msg);
-             continue;
-           }
+           vcl_handle_mq_event (wrk, e);
          svm_msg_q_free_msg (mq, &msg);
 
-         if (PREDICT_FALSE (s->session_state == STATE_VPP_CLOSING))
-           return 0;
+         if (PREDICT_FALSE (s->session_state == STATE_DISCONNECT))
+           return VPPCOM_ECONNRESET;
        }
     }
 
@@ -1644,15 +1640,11 @@ vppcom_session_read_segments (uint32_t session_handle,
          e = svm_msg_q_msg_data (mq, &msg);
          svm_msg_q_unlock (mq);
          if (!vcl_is_rx_evt_for_session (e, s->session_index, is_ct))
-           {
-             vcl_handle_mq_event (wrk, e);
-             svm_msg_q_free_msg (mq, &msg);
-             continue;
-           }
+           vcl_handle_mq_event (wrk, e);
          svm_msg_q_free_msg (mq, &msg);
 
-         if (PREDICT_FALSE (s->session_state == STATE_VPP_CLOSING))
-           return 0;
+         if (PREDICT_FALSE (s->session_state == STATE_DISCONNECT))
+           return VPPCOM_ECONNRESET;
        }
     }
 
@@ -1802,12 +1794,12 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
          if (!vcl_is_tx_evt_for_session (e, s->session_index, is_ct))
            vcl_handle_mq_event (wrk, e);
          svm_msg_q_free_msg (mq, &msg);
+
+         if (PREDICT_FALSE (!(s->session_state & STATE_OPEN)))
+           return VPPCOM_ECONNRESET;
        }
     }
 
-  if (PREDICT_FALSE (!(s->session_state & STATE_OPEN)))
-    return VPPCOM_ECONNRESET;
-
   ASSERT (FIFO_EVENT_APP_TX + 1 == SESSION_IO_EVT_CT_TX);
   et = FIFO_EVENT_APP_TX + vcl_session_is_ct (s);
   if (is_flush && !vcl_session_is_ct (s))