From 5b81b934bff7350d3c8d5a607ca64b420b78cdc5 Mon Sep 17 00:00:00 2001
From: Sylvain Rochet <gradator@gradator.net>
Date: Wed, 24 Dec 2014 17:36:23 +0100
Subject: [PATCH] unixsim: add support for user chosen netmask

---
 ports/unix/netif/tapif.c | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/ports/unix/netif/tapif.c b/ports/unix/netif/tapif.c
index 562acfe..3c242a2 100644
--- a/ports/unix/netif/tapif.c
+++ b/ports/unix/netif/tapif.c
@@ -65,13 +65,16 @@
 #include <linux/if.h>
 #include <linux/if_tun.h>
 #define DEVTAP "/dev/net/tun"
-#define IFCONFIG_ARGS "tap0 inet %d.%d.%d.%d"
+#define NETMASK_ARGS "netmask %d.%d.%d.%d"
+#define IFCONFIG_ARGS "tap0 inet %d.%d.%d.%d " NETMASK_ARGS
 #elif defined(openbsd)
 #define DEVTAP "/dev/tun0"
-#define IFCONFIG_ARGS "tun0 inet %d.%d.%d.%d link0"
+#define NETMASK_ARGS "netmask %d.%d.%d.%d"
+#define IFCONFIG_ARGS "tun0 inet %d.%d.%d.%d " NETMASK_ARGS " link0"
 #else /* others */
 #define DEVTAP "/dev/tap0"
-#define IFCONFIG_ARGS "tap0 inet %d.%d.%d.%d"
+#define NETMASK_ARGS "netmask %d.%d.%d.%d"
+#define IFCONFIG_ARGS "tap0 inet %d.%d.%d.%d " NETMASK_ARGS
 #endif
 
 #define IFNAME0 't'
@@ -137,10 +140,18 @@ low_level_init(struct netif *netif)
 #endif /* Linux */
 
   sprintf(buf, IFCONFIG_BIN IFCONFIG_ARGS,
-           ip4_addr1(&(netif->gw)),
-           ip4_addr2(&(netif->gw)),
-           ip4_addr3(&(netif->gw)),
-           ip4_addr4(&(netif->gw)));
+           ip4_addr1(&(netif->ip_addr)),
+           ip4_addr2(&(netif->ip_addr)),
+           ip4_addr3(&(netif->ip_addr)),
+           ip4_addr4(&(netif->ip_addr))
+#ifdef NETMASK_ARGS
+           ,
+           ip4_addr1(&(netif->netmask)),
+           ip4_addr2(&(netif->netmask)),
+           ip4_addr3(&(netif->netmask)),
+           ip4_addr4(&(netif->netmask))
+#endif /* NETMASK_ARGS */
+           );
 
   LWIP_DEBUGF(TAPIF_DEBUG, ("tapif_init: system(\"%s\");\n", buf));
   system(buf);