vcl: if the ldp user send buf with 0 len, it will assert failed.

[vpp.git] / src / vcl / vppcom.c

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 10cf17a..0e5d4fa 100644 (file)
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -449,19 +449,23 @@ vcl_session_connected_handler (vcl_worker_t * wrk,
     {
       VDBG (0, "ERROR: session index %u: connect failed! %U",
            session_index, format_api_error, ntohl (mp->retval));
-      session->session_state = STATE_FAILED;
+      session->session_state = STATE_FAILED | STATE_DISCONNECT;
       session->vpp_handle = mp->handle;
       return session_index;
     }
 
+  session->vpp_handle = mp->handle;
+  session->vpp_evt_q = uword_to_pointer (mp->vpp_event_queue_address,
+                                        svm_msg_q_t *);
   rx_fifo = uword_to_pointer (mp->server_rx_fifo, svm_fifo_t *);
   tx_fifo = uword_to_pointer (mp->server_tx_fifo, svm_fifo_t *);
   if (vcl_wait_for_segment (mp->segment_handle))
     {
       VDBG (0, "segment for session %u couldn't be mounted!",
            session->session_index);
-      session->session_state = STATE_FAILED;
-      return VCL_INVALID_SESSION_INDEX;
+      session->session_state = STATE_FAILED | STATE_DISCONNECT;
+      vcl_send_session_disconnect (wrk, session);
+      return session_index;
     }
 
   rx_fifo->client_session_index = session_index;
@@ -469,8 +473,6 @@ vcl_session_connected_handler (vcl_worker_t * wrk,
   rx_fifo->client_thread_index = vcl_get_worker_index ();
   tx_fifo->client_thread_index = vcl_get_worker_index ();
 
-  session->vpp_evt_q = uword_to_pointer (mp->vpp_event_queue_address,
-                                        svm_msg_q_t *);
   vpp_wrk_index = tx_fifo->master_thread_index;
   vec_validate (wrk->vpp_event_queues, vpp_wrk_index);
   wrk->vpp_event_queues[vpp_wrk_index] = session->vpp_evt_q;
@@ -483,14 +485,14 @@ vcl_session_connected_handler (vcl_worker_t * wrk,
        {
          VDBG (0, "ct segment for session %u couldn't be mounted!",
                session->session_index);
-         session->session_state = STATE_FAILED;
-         return VCL_INVALID_SESSION_INDEX;
+         session->session_state = STATE_FAILED | STATE_DISCONNECT;
+         vcl_send_session_disconnect (wrk, session);
+         return session_index;
        }
     }
 
   session->rx_fifo = rx_fifo;
   session->tx_fifo = tx_fifo;
-  session->vpp_handle = mp->handle;
   session->vpp_thread_index = rx_fifo->master_thread_index;
   session->transport.is_ip4 = mp->lcl.is_ip4;
   clib_memcpy_fast (&session->transport.lcl_ip, &mp->lcl.ip,
@@ -1462,11 +1464,11 @@ vppcom_session_accept (uint32_t listen_session_handle, vppcom_endpt_t * ep,
 
   is_nonblocking = VCL_SESS_ATTR_TEST (listen_session->attr,
                                       VCL_SESS_ATTR_NONBLOCK);
-  if (svm_msg_q_is_empty (wrk->app_event_queue) && is_nonblocking)
-    return VPPCOM_EAGAIN;
-
   while (1)
     {
+      if (svm_msg_q_is_empty (wrk->app_event_queue) && is_nonblocking)
+       return VPPCOM_EAGAIN;
+
       if (svm_msg_q_sub (wrk->app_event_queue, &msg, SVM_Q_WAIT, 0))
        return VPPCOM_EAGAIN;
 
@@ -1895,7 +1897,7 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
   svm_msg_q_t *mq;
   u8 is_ct;
 
-  if (PREDICT_FALSE (!buf))
+  if (PREDICT_FALSE (!buf || n == 0))
     return VPPCOM_EINVAL;
 
   s = vcl_session_get_w_handle (wrk, session_handle);
@@ -1986,6 +1988,8 @@ vppcom_session_write_msg (uint32_t session_handle, void *buf, size_t n)
 }
 
 #define vcl_fifo_rx_evt_valid_or_break(_s)                             \
+if (PREDICT_FALSE (!_s->rx_fifo))                                      \
+  break;                                                               \
 if (PREDICT_FALSE (svm_fifo_is_empty (_s->rx_fifo)))                   \
   {                                                                    \
     if (!vcl_session_is_ct (_s))                                       \
@@ -2623,9 +2627,8 @@ vcl_epoll_wait_handle_mq_event (vcl_worker_t * wrk, session_event_t * e,
       break;
     case SESSION_CTRL_EVT_CONNECTED:
       connected_msg = (session_connected_msg_t *) e->data;
-      vcl_session_connected_handler (wrk, connected_msg);
+      sid = vcl_session_connected_handler (wrk, connected_msg);
       /* Generate EPOLLOUT because there's no connected event */
-      sid = vcl_session_index_from_vpp_handle (wrk, connected_msg->handle);
       if (!(session = vcl_session_get (wrk, sid)))
        break;
       session_events = session->vep.ev.events;
@@ -2634,6 +2637,8 @@ vcl_epoll_wait_handle_mq_event (vcl_worker_t * wrk, session_event_t * e,
       add_event = 1;
       events[*num_ev].events |= EPOLLOUT;
       session_evt_data = session->vep.ev.data.u64;
+      if (session->session_state & STATE_FAILED)
+       events[*num_ev].events |= EPOLLHUP;
       break;
     case SESSION_CTRL_EVT_DISCONNECTED:
       disconnected_msg = (session_disconnected_msg_t *) e->data;