adjusting for Linux when sctp_recvmsg returns 0 for remote close

This commit was SVN r16742.

ompi/mca/btl/sctp/btl_sctp_component.c

@@ -930,6 +930,8 @@ static void mca_btl_sctp_component_recv_handler(int sd, short flags, void* user)
         CLOSE_THE_SOCKET(sd); 
         return; 
     }
+    SCTP_BTL_ERROR(("mca_btl_sctp_component_recv_handler() sd=%d, got %d byte guid.\n", sd, retval));
+
     ORTE_PROCESS_NAME_NTOH(guid);
    
     /* lookup the corresponding process */

ompi/mca/btl/sctp/btl_sctp_endpoint.c

@@ -780,10 +780,10 @@ static int mca_btl_sctp_endpoint_recv_blocking(mca_btl_base_endpoint_t* btl_endp
              */
             retval = sctp_recvmsg(btl_endpoint->endpoint_sd, (char *)ptr+cnt, size-cnt, 
                                   0, 0, &sri, &msg_flags);
-            if(retval >= 0) { SCTP_BTL_ERROR(("mca_btl_sctp_endpoint_recv_blocking() sd=%d, got %d bytes.\n", btl_endpoint->endpoint_sd, retval)); }
 
             /* remote closed connection */
-            if(retval == -1 && (opal_socket_errno == ECONNRESET || opal_socket_errno == EBADF)) {
+            if((retval == -1 && (opal_socket_errno == ECONNRESET || opal_socket_errno == EBADF))
+               || retval == 0) {
                 mca_btl_sctp_endpoint_close(btl_endpoint);
                 return -1;
             }
@@ -797,6 +797,8 @@ static int mca_btl_sctp_endpoint_recv_blocking(mca_btl_base_endpoint_t* btl_endp
                 }
                 continue;
             }
+            SCTP_BTL_ERROR(("mca_btl_sctp_endpoint_recv_blocking() sd=%d, got %d bytes.\n", btl_endpoint->endpoint_sd, retval));
+            
             cnt += retval;
         }
         return cnt;