Added check for DNET as part of address to make sure it is for us and not a network beyond us.

bacnet-stack/src/npdu.c

@@ -40,6 +40,8 @@
 #include "bits.h"
 #include "npdu.h"
 #include "apdu.h"
+#define DEBUG_ENABLED 0
+#include "debug.h"
 
 #if PRINT_ENABLED
 #include <stdio.h>
@@ -381,17 +383,22 @@ void npdu_handler(
     apdu_offset = npdu_decode(&pdu[0], &dest, src, &npdu_data);
     if (npdu_data.network_layer_message) {
         /*FIXME: network layer message received!  Handle it! */
-#if PRINT_ENABLED
+        debug_printf("NPDU: Network Layer Message discarded!\n");
-        fprintf(stderr, "NPDU: Network Layer Message discarded!\n");
-#endif
     } else if ((apdu_offset > 0) && (apdu_offset <= pdu_len)) {
         if ((npdu_data.protocol_version == BACNET_PROTOCOL_VERSION) &&
-            (dest.net == 0)) {
+            ((dest.net == 0) || (dest.net == BACNET_BROADCAST_NETWORK))) {
             /* only handle the version that we know how to handle */
             /* and we are not a router, so ignore messages with
                routing information cause they are not for us */
             apdu_handler(src, &pdu[apdu_offset],
                 (uint16_t) (pdu_len - apdu_offset));
+        } else {
+            if (dest.net) {
+                debug_printf("NPDU: DNET=%d.  Discarded!\n", dest.net);
+            } else {
+                debug_printf("NPDU: BACnet Protocol Version=%d.  Discarded!\n", 
+                    npdu_data.protocol_version);
+            }
         }
     }