session: improve error reporting

Type: improvement

Change-Id: I9dd850a1ce85b0adb5136233f176117e0ee38817
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index d85225b..b1ae374 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -738,10 +738,7 @@
     }
   port = transport_alloc_local_port (TRANSPORT_PROTO_TCP, lcl_addr);
   if (port < 1)
-    {
-      clib_warning ("Failed to allocate src port");
-      return -1;
-    }
+    return SESSION_E_NOPORT;
   *lcl_port = port;
   return 0;
 }
@@ -767,7 +764,7 @@
 					 rmt, &lcl_addr, &lcl_port);
 
   if (rv)
-    return -1;
+    return rv;
 
   /*
    * Create connection and send SYN
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 713e11f..403acad 100755
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -1985,7 +1985,8 @@
 
 	  /* Notify app that we have connection. If session layer can't
 	   * allocate session send reset */
-	  if (session_stream_connect_notify (&new_tc0->connection, 0))
+	  if (session_stream_connect_notify (&new_tc0->connection,
+					     SESSION_E_NONE))
 	    {
 	      tcp_send_reset_w_pkt (new_tc0, b0, my_thread_index, is_ip4);
 	      tcp_connection_cleanup (new_tc0);
@@ -2006,7 +2007,8 @@
 	  new_tc0->state = TCP_STATE_SYN_RCVD;
 
 	  /* Notify app that we have connection */
-	  if (session_stream_connect_notify (&new_tc0->connection, 0))
+	  if (session_stream_connect_notify (&new_tc0->connection,
+					     SESSION_E_NONE))
 	    {
 	      tcp_connection_cleanup (new_tc0);
 	      tcp_send_reset_w_pkt (tc0, b0, my_thread_index, is_ip4);
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index a68d526..095f360 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -1472,7 +1472,7 @@
   /* Active open establish timeout */
   if (tc->rto >= TCP_ESTABLISH_TIME >> 1)
     {
-      session_stream_connect_notify (&tc->connection, 1 /* fail */ );
+      session_stream_connect_notify (&tc->connection, SESSION_E_TIMEDOUT);
       tcp_connection_cleanup (tc);
       return;
     }