Added support for new loopback code in win32 port

ports/win32/lwipopts.h

@@ -43,6 +43,8 @@
 #define LWIP_DNS                   1
 
 #define LWIP_HAVE_LOOPIF           1
+#define LWIP_NETIF_LOOPBACK        1
+#define LWIP_LOOPBACK_MAX_PBUFS    10
 
 #define TCP_LISTEN_BACKLOG         0
 

ports/win32/test.c

@@ -428,6 +428,10 @@ void main_loop()
 
     /* check for packets and link status*/
     ethernetif_poll(&netif);
+#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
+    /* check for loopback packets on all netifs */
+    netif_poll_all();
+#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
   }
 
   /* release the pcap library... */