4 files changed, 36 insertions, 10 deletions

diff --git a/ChangeLog b/ChangeLog
index f12b945..1fe18e7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -16,6 +16,7 @@ $Id$
   (David Stipp).
 * Fixed typo in manage.c where inline function declaration
   was declared without the "static" keyword (David Stipp).
+* Patch to support --topology subnet on Mac OS X (Mathias Sundman).
 
 2005.11.12 -- Version 2.1-beta7
 
diff --git a/route.c b/route.c
index 1db0b36..06e1fac 100644
--- a/route.c
+++ b/route.c
@@ -45,7 +45,6 @@
 
 #include "memdbg.h"
 
-static void add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es);
 static void delete_route (const struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es);
 static bool get_default_gateway (in_addr_t *ret);
 static void get_bypass_addresses (struct route_bypass *rb, const unsigned int flags);
@@ -741,7 +740,7 @@ setenv_routes (struct env_set *es, const struct route_list *rl)
     setenv_route (es, &rl->routes[i], i + 1);
 }
 
-static void
+void
 add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
 {
   struct gc_arena gc;
diff --git a/route.h b/route.h
index 21f5465..c2da533 100644
--- a/route.h
+++ b/route.h
@@ -118,6 +118,8 @@ struct route_option_list *new_route_option_list (struct gc_arena *a);
 
 struct route_list *new_route_list (struct gc_arena *a);
 
+void add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es);
+
 void add_route_to_option_list (struct route_option_list *l,
 			       const char *network,
 			       const char *netmask,
diff --git a/tun.c b/tun.c
index 0420817..eafa8d6 100644
--- a/tun.c
+++ b/tun.c
@@ -44,6 +44,7 @@
 #include "misc.h"
 #include "socket.h"
 #include "manage.h"
+#include "route.h"
 
 #include "memdbg.h"
 
@@ -746,18 +747,41 @@ do_ifconfig (struct tuntap *tt,
 			  tun_mtu
 			  );
       else
-	openvpn_snprintf (command_line, sizeof (command_line),
-			  IFCONFIG_PATH " %s %s netmask %s mtu %d up",
-			  actual,
-			  ifconfig_local,
-			  ifconfig_remote_netmask,
-			  tun_mtu
-			  );
-
+        {
+          if (tt->topology == TOP_SUBNET)
+    	    openvpn_snprintf (command_line, sizeof (command_line),
+			      IFCONFIG_PATH " %s %s %s netmask %s mtu %d up",
+			      actual,
+			      ifconfig_local,
+			      ifconfig_local,
+			      ifconfig_remote_netmask,
+			      tun_mtu
+			      );
+	  else
+    	    openvpn_snprintf (command_line, sizeof (command_line),
+			      IFCONFIG_PATH " %s %s netmask %s mtu %d up",
+			      actual,
+			      ifconfig_local,
+			      ifconfig_remote_netmask,
+			      tun_mtu
+			      );
+	}
       msg (M_INFO, "%s", command_line);
       system_check (command_line, es, S_FATAL, "Mac OS X ifconfig failed");
       tt->did_ifconfig = true;
 
+      /* Add a network route for the local tun interface */
+      if (!tun && tt->topology == TOP_SUBNET)
+	{
+	  struct route r;
+	  CLEAR (r);
+	  r.defined = true;
+	  r.network = tt->local & tt->remote_netmask;
+	  r.netmask = tt->remote_netmask;
+	  r.gateway = tt->local;
+	  add_route (&r, tt, 0, es);
+	}
+
 #elif defined(TARGET_FREEBSD)
 
       /* example: ifconfig tun2 10.2.0.2 10.2.0.1 mtu 1450 netmask 255.255.255.255 up */