mips_sys

@@ -223,17 +223,41 @@ void ip_send(void *ptr, unsigned int sz)

       (ip_pack->ip_hdr.dest[2] & config_ip.mask[2]) ==

         (config_ip.ip[2] & config_ip.mask[2]) &&

       (ip_pack->ip_hdr.dest[3] & config_ip.mask[3]) ==

-        (config_ip.ip[3] & config_ip.mask[3]))

+        (config_ip.ip[3] & config_ip.mask[3])) {

+    // broadcast

+    if ((ip_pack->ip_hdr.dest[0] | config_ip.mask[0]) == 0xFF &&

+        (ip_pack->ip_hdr.dest[1] | config_ip.mask[1]) == 0xFF &&

+        (ip_pack->ip_hdr.dest[2] | config_ip.mask[2]) == 0xFF &&

+        (ip_pack->ip_hdr.dest[3] | config_ip.mask[3]) == 0xFF) {

+      mac_cpy(ip_pack->eth_hdr.dest, "\xFF\xFF\xFF\xFF\xFF\xFF");

+      i = 0; // MAC is available

+    }

+    // unicast

+    else {

       // lookup MAC address of destination

       i = arp_lookup(ip_pack->ip_hdr.dest, ip_pack->eth_hdr.dest);

+    }

+  }

   // destination is not in own subnet

-  else

+  else {

+    // broadcast

+    if (ip_pack->ip_hdr.dest[0] == 0xFF &&

+        ip_pack->ip_hdr.dest[1] == 0xFF &&

+        ip_pack->ip_hdr.dest[2] == 0xFF &&

+        ip_pack->ip_hdr.dest[3] == 0xFF) {

+      mac_cpy(ip_pack->eth_hdr.dest, "\xFF\xFF\xFF\xFF\xFF\xFF");

+      i = 0; // MAC is available

+    }

+    // unicast

+    else {

       // lookup MAC address of default gateway

       i = arp_lookup(config_ip.gw, ip_pack->eth_hdr.dest);

+    }

+  }

   // MAC available

   if (i == 0x00) {

-    // sent IP packet

+    // send IP packet

     ip_pack->eth_hdr.type = htons(0x0800); // ethernet packet type: IP

     ethernet_send(ip_pack, sz);

     return;