When MAC address length is zero, assume it is a broadcast. Updated the MS/TP to understand this.

2014-11-02 05:27:14 +00:00
parent cab93e9db4
commit 3fca74bcfb
9 changed files with 41 additions and 21 deletions
@@ -105,10 +105,11 @@ int dlmstp_send_pdu(
            MSTP_Port.TxFrameType = FRAME_TYPE_BACNET_DATA_NOT_EXPECTING_REPLY;

        /* load destination MAC address */
-        if (dest && dest->mac_len == 1) {
+        if (dest && dest->mac_len) {
            MSTP_Port.TxDestination = dest->mac[0];
        } else {
-            return -2;
+            /* mac_len = 0 is a broadcast address */
+            MSTP_Port.TxDestination = MSTP_BROADCAST_ADDRESS;
        }
        dlmstp_get_my_address(&src);
        if ((MAX_HEADER + pdu_len) > MAX_MPDU) {