Display hexa representation of the borken header if any, since it's often binary...

[simgrid.git] / src / gras / Msg / rl_msg.c

diff --git a/src/gras/Msg/rl_msg.c b/src/gras/Msg/rl_msg.c
index a4c4e16..273c3a9 100644 (file)
--- a/src/gras/Msg/rl_msg.c
+++ b/src/gras/Msg/rl_msg.c
@@ -71,6 +71,9 @@ void gras_msg_send_ext(gras_socket_t   sock,
   gras_trp_flush(sock);
 }
 
+const char *hexa_str(unsigned char *data, int size, int downside);
+   
+   
 /*
  * receive the next message on the given socket.  
  */
@@ -110,8 +113,8 @@ gras_msg_recv(gras_socket_t    sock,
   for (cpt=0; cpt<4; cpt++)
     if (header[cpt] != _GRAS_header[cpt])
       THROW2(mismatch_error,0,
-            "Incoming bytes do not look like a GRAS message (header='%.4s' not '%.4s')",
-            header,_GRAS_header);
+            "Incoming bytes do not look like a GRAS message (header='%s'  not '%.4s')",
+            hexa_str((unsigned char*)header,4,0),_GRAS_header);
   if (header[4] != _GRAS_header[4]) 
     THROW2(mismatch_error,0,"GRAS protocol mismatch (got %d, use %d)",
           (int)header[4], (int)_GRAS_header[4]);