- Send a gratuitous ARP packet when our IP address changes

svn path=/trunk/; revision=42455

reactos/lib/drivers/ip/network/arp.c

@@ -123,6 +123,11 @@ BOOLEAN ARPTransmit(PIP_ADDRESS Address, PIP_INTERFACE Interface)
 
     TI_DbgPrint(DEBUG_ARP, ("Called.\n"));
 
+    /* If Address is NULL then the caller wants an
+     * gratuitous ARP packet sent */
+    if (!Address)
+        Address = &Interface->Unicast;
+
     switch (Address->Type) {
         case IP_ADDRESS_V4:
             ProtoType    = (USHORT)ETYPE_IPv4; /* IPv4 */

reactos/lib/drivers/ip/network/ip.c

@@ -222,8 +222,12 @@ VOID IPAddInterfaceRoute( PIP_INTERFACE IF ) {
 
     if (!RouterAddRoute(&NetworkAddress, &IF->Netmask, NCE, 1)) {
 	TI_DbgPrint(MIN_TRACE, ("Could not add route due to insufficient resources.\n"));
-        return;
     }
+
+    /* Send a gratuitous ARP packet to update the route caches of
+     * other computers */
+    if (IF != Loopback)
+       ARPTransmit(NULL, IF);
 }
 
 BOOLEAN IPRegisterInterface(