corrected code to make it work

bacnet-stack/ports/linux/ethernet.c

@@ -203,16 +203,7 @@ int ethernet_send(
     {
       for (i = 0; i < 6; i++)
       {
-        mtu[i] = dest->mac[i];
-        mtu_len++;
-      }
-    }
-    // Global Broadcast
-    else if (dest->mac_len == 0)
-    {
-      for (i = 0; i < 6; i++)
-      {
-        mtu[i] = Ethernet_Broadcast[i];
+        mtu[mtu_len] = dest->mac[i];
         mtu_len++;
       }
     }
@@ -227,7 +218,7 @@ int ethernet_send(
     {
       for (i = 0; i < 6; i++)
       {
-        mtu[i] = src->mac[i];
+        mtu[mtu_len] = src->mac[i];
         mtu_len++;
       }
     }
@@ -377,7 +368,7 @@ void ethernet_set_broadcast_address(
   {
     for (i = 0; i < 6; i++)
     {
-      dest->mac[i] = 0xFF;
+      dest->mac[i] = Ethernet_Broadcast[i];
     }
     dest->mac_len = 6;
     dest->net = BACNET_BROADCAST_NETWORK;

bacnet-stack/ports/linux/main.c

@@ -35,8 +35,7 @@ void Send_IAm(void)
   BACNET_ADDRESS src;
 
   // I-Am is a global broadcast
-  dest.mac_len = 0;
-
+  ethernet_set_broadcast_address(&dest);
   ethernet_get_my_address(&src);
 
   // encode the NPDU portion of the packet
@@ -59,6 +58,7 @@ void Send_IAm(void)
     &dest,  // destination address
     &Tx_Buf[0],
     pdu_len); // number of bytes of data
+  fprintf(stderr,"Sent I-Am Request!\n");
 }
 
 void WhoIsHandler(
@@ -70,7 +70,7 @@ void WhoIsHandler(
   int32_t low_limit = 0;
   int32_t high_limit = 0;
 
-  fprintf(stderr,"Received Who-Is Request!\r");
+  fprintf(stderr,"Received Who-Is Request!\n");
   len = whois_decode_service_request(
     service_request,
     service_len,