Imported Upstream version 2.3_rc1

1 files changed, 0 insertions, 2404 deletions

diff --git a/route.c b/route.c
deleted file mode 100644
index b5092fe..0000000
--- a/route.c
+++ /dev/null
@@ -1,2404 +0,0 @@
-/*
- *  OpenVPN -- An application to securely tunnel IP networks
- *             over a single TCP/UDP port, with support for SSL/TLS-based
- *             session authentication and key exchange,
- *             packet encryption, packet authentication, and
- *             packet compression.
- *
- *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program (see the file COPYING included with this
- *  distribution); if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-/*
- * Support routines for adding/deleting network routes.
- */
-
-#include "syshead.h"
-
-#include "common.h"
-#include "error.h"
-#include "route.h"
-#include "misc.h"
-#include "socket.h"
-#include "manage.h"
-#include "win32.h"
-
-#include "memdbg.h"
-
-static void delete_route (const struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es);
-static void get_bypass_addresses (struct route_bypass *rb, const unsigned int flags);
-
-#ifdef ENABLE_DEBUG
-
-static void
-print_bypass_addresses (const struct route_bypass *rb)
-{
-  struct gc_arena gc = gc_new ();
-  int i;
-  for (i = 0; i < rb->n_bypass; ++i)
-    {
-      msg (D_ROUTE, "ROUTE: bypass_host_route[%d]=%s",
-	   i,
-	   print_in_addr_t (rb->bypass[i], 0, &gc));
-    }
-  gc_free (&gc);
-}
-
-#endif
-
-struct route_option_list *
-new_route_option_list (const int max_routes, struct gc_arena *a)
-{
-  struct route_option_list *ret;
-  ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_option_list, struct route_option, max_routes, a);
-  ret->capacity = max_routes;
-  return ret;
-}
-
-struct route_option_list *
-clone_route_option_list (const struct route_option_list *src, struct gc_arena *a)
-{
-  const size_t rl_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list));
-  struct route_option_list *ret = gc_malloc (rl_size, false, a);
-  memcpy (ret, src, rl_size);
-  return ret;
-}
-
-void
-copy_route_option_list (struct route_option_list *dest, const struct route_option_list *src)
-{
-  const size_t src_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list));
-  if (src->n > dest->capacity)
-    msg (M_FATAL, PACKAGE_NAME " ROUTE: (copy) number of route options in src (%d) is greater than route list capacity in dest (%d)", src->n, dest->capacity);
-  memcpy (dest, src, src_size);
-}
-
-struct route_list *
-new_route_list (const int max_routes, struct gc_arena *a)
-{
-  struct route_list *ret;
-  ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_list, struct route, max_routes, a);
-  ret->capacity = max_routes;
-  return ret;
-}
-
-static const char *
-route_string (const struct route *r, struct gc_arena *gc)
-{
-  struct buffer out = alloc_buf_gc (256, gc);
-  buf_printf (&out, "ROUTE network %s netmask %s gateway %s",
-	      print_in_addr_t (r->network, 0, gc),
-	      print_in_addr_t (r->netmask, 0, gc),
-	      print_in_addr_t (r->gateway, 0, gc)
-	      );
-  if (r->metric_defined)
-    buf_printf (&out, " metric %d", r->metric);
-  return BSTR (&out);
-}
-
-static bool
-is_route_parm_defined (const char *parm)
-{
-  if (!parm)
-    return false;
-  if (!strcmp (parm, "default"))
-    return false;
-  return true;
-}
-
-static void
-setenv_route_addr (struct env_set *es, const char *key, const in_addr_t addr, int i)
-{
-  struct gc_arena gc = gc_new ();
-  struct buffer name = alloc_buf_gc (256, &gc);
-  if (i >= 0)
-    buf_printf (&name, "route_%s_%d", key, i);
-  else
-    buf_printf (&name, "route_%s", key);
-  setenv_str (es, BSTR (&name), print_in_addr_t (addr, 0, &gc));
-  gc_free (&gc);
-}
-
-static bool
-get_special_addr (const struct route_special_addr *spec,
-		  const char *string,
-		  in_addr_t *out,
-		  bool *status)
-{
-  if (status)
-    *status = true;
-  if (!strcmp (string, "vpn_gateway"))
-    {
-      if (spec)
-	{
-	  if (spec->remote_endpoint_defined)
-	    *out = spec->remote_endpoint;
-	  else
-	    {
-	      msg (M_INFO, PACKAGE_NAME " ROUTE: vpn_gateway undefined");
-	      if (status)
-		*status = false;
-	    }
-	}
-      return true;
-    }
-  else if (!strcmp (string, "net_gateway"))
-    {
-      if (spec)
-	{
-	  if (spec->net_gateway_defined)
-	    *out = spec->net_gateway;
-	  else
-	    {
-	      msg (M_INFO, PACKAGE_NAME " ROUTE: net_gateway undefined -- unable to get default gateway from system");
-	      if (status)
-		*status = false;
-	    }
-	}
-      return true;
-    }
-  else if (!strcmp (string, "remote_host"))
-    {
-      if (spec)
-	{
-	  if (spec->remote_host_defined)
-	    *out = spec->remote_host;
-	  else
-	    {
-	      msg (M_INFO, PACKAGE_NAME " ROUTE: remote_host undefined");
-	      if (status)
-		*status = false;
-	    }
-	}
-      return true;
-    }
-  return false;
-}
-
-bool
-is_special_addr (const char *addr_str)
-{
-  if (addr_str)
-    return get_special_addr (NULL, addr_str, NULL, NULL);
-  else
-    return false;
-}
-
-static bool
-init_route (struct route *r,
-	    struct resolve_list *network_list,
-	    const struct route_option *ro,
-	    const struct route_special_addr *spec)
-{
-  const in_addr_t default_netmask = ~0;
-  bool status;
-
-  r->option = ro;
-  r->defined = false;
-
-  /* network */
-
-  if (!is_route_parm_defined (ro->network))
-    {
-      goto fail;
-    }
-  
-  if (!get_special_addr (spec, ro->network, &r->network, &status))
-    {
-      r->network = getaddr_multi (
-				  GETADDR_RESOLVE
-				  | GETADDR_HOST_ORDER
-				  | GETADDR_WARN_ON_SIGNAL,
-				  ro->network,
-				  0,
-				  &status,
-				  NULL,
-				  network_list);
-    }
-
-  if (!status)
-    goto fail;
-
-  /* netmask */
-
-  if (is_route_parm_defined (ro->netmask))
-    {
-      r->netmask = getaddr (
-			    GETADDR_HOST_ORDER
-			    | GETADDR_WARN_ON_SIGNAL,
-			    ro->netmask,
-			    0,
-			    &status,
-			    NULL);
-      if (!status)
-	goto fail;
-    }
-  else
-    r->netmask = default_netmask;
-
-  /* gateway */
-
-  if (is_route_parm_defined (ro->gateway))
-    {
-      if (!get_special_addr (spec, ro->gateway, &r->gateway, &status))
-	{
-	  r->gateway = getaddr (
-				GETADDR_RESOLVE
-				| GETADDR_HOST_ORDER
-				| GETADDR_WARN_ON_SIGNAL,
-				ro->gateway,
-				0,
-				&status,
-				NULL);
-	}
-      if (!status)
-	goto fail;
-    }
-  else
-    {
-      if (spec->remote_endpoint_defined)
-	r->gateway = spec->remote_endpoint;
-      else
-	{
-	  msg (M_WARN, PACKAGE_NAME " ROUTE: " PACKAGE_NAME " needs a gateway parameter for a --route option and no default was specified by either --route-gateway or --ifconfig options");
-	  goto fail;
-	}
-    }
-
-  /* metric */
-
-  r->metric_defined = false;
-  r->metric = 0;
-  if (is_route_parm_defined (ro->metric))
-    {
-      r->metric = atoi (ro->metric);
-      if (r->metric < 0)
-	{
-	  msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0",
-	       ro->network,
-	       ro->metric);
-	  goto fail;
-	}
-      r->metric_defined = true;
-    }
-  else if (spec->default_metric_defined)
-    {
-      r->metric = spec->default_metric;
-      r->metric_defined = true;
-    }
-
-  r->defined = true;
-
-  return true;
-
- fail:
-  msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s",
-       ro->network);
-  r->defined = false;
-  return false;
-}
-
-void
-add_route_to_option_list (struct route_option_list *l,
-			  const char *network,
-			  const char *netmask,
-			  const char *gateway,
-			  const char *metric)
-{
-  struct route_option *ro;
-  if (l->n >= l->capacity)
-    msg (M_FATAL, PACKAGE_NAME " ROUTE: cannot add more than %d routes -- please increase the max-routes option in the client configuration file",
-	 l->capacity);
-  ro = &l->routes[l->n];
-  ro->network = network;
-  ro->netmask = netmask;
-  ro->gateway = gateway;
-  ro->metric = metric;
-  ++l->n;
-}
-
-void
-clear_route_list (struct route_list *rl)
-{
-  const int capacity = rl->capacity;
-  const size_t rl_size = array_mult_safe (sizeof(struct route), capacity, sizeof(struct route_list));
-  memset(rl, 0, rl_size);
-  rl->capacity = capacity;
-}
-
-void
-route_list_add_default_gateway (struct route_list *rl,
-				struct env_set *es,
-				const in_addr_t addr)
-{
-  rl->spec.remote_endpoint = addr;
-  rl->spec.remote_endpoint_defined = true;
-  setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1);
-}
-
-bool
-init_route_list (struct route_list *rl,
-		 const struct route_option_list *opt,
-		 const char *remote_endpoint,
-		 int default_metric,
-		 in_addr_t remote_host,
-		 struct env_set *es)
-{
-  struct gc_arena gc = gc_new ();
-  bool ret = true;
-
-  clear_route_list (rl);
-
-  rl->flags = opt->flags;
-
-  if (remote_host)
-    {
-      rl->spec.remote_host = remote_host;
-      rl->spec.remote_host_defined = true;
-    }
-
-  if (default_metric)
-    {
-      rl->spec.default_metric = default_metric;
-      rl->spec.default_metric_defined = true;
-    }
-
-  rl->spec.net_gateway_defined = get_default_gateway (&rl->spec.net_gateway, NULL);
-  if (rl->spec.net_gateway_defined)
-    {
-      setenv_route_addr (es, "net_gateway", rl->spec.net_gateway, -1);
-      dmsg (D_ROUTE, "ROUTE default_gateway=%s", print_in_addr_t (rl->spec.net_gateway, 0, &gc));
-    }
-  else
-    {
-      dmsg (D_ROUTE, "ROUTE: default_gateway=UNDEF");
-    }
-
-  if (rl->flags & RG_ENABLE)
-    {
-      get_bypass_addresses (&rl->spec.bypass, rl->flags);
-#ifdef ENABLE_DEBUG
-      print_bypass_addresses (&rl->spec.bypass);
-#endif
-    }
-
-  if (is_route_parm_defined (remote_endpoint))
-    {
-      rl->spec.remote_endpoint = getaddr (
-				     GETADDR_RESOLVE
-				     | GETADDR_HOST_ORDER
-				     | GETADDR_WARN_ON_SIGNAL,
-				     remote_endpoint,
-				     0,
-				     &rl->spec.remote_endpoint_defined,
-				     NULL);
-
-      if (rl->spec.remote_endpoint_defined)
-	{
-	  setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1);
-	}
-      else
-	{
-	  msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s",
-	       remote_endpoint);
-	  ret = false;
-	}
-    }
-  else
-    rl->spec.remote_endpoint_defined = false;
-
-  /* parse the routes from opt to rl */
-  {
-    int i, j = 0;
-    bool warned = false;
-    for (i = 0; i < opt->n; ++i)
-      {
-	struct resolve_list netlist;
-	struct route r;
-	int k;
-
-        CLEAR(netlist);		/* init_route() will not always init this */
-
-	if (!init_route (&r,
-			 &netlist,
-			 &opt->routes[i],
-			 &rl->spec))
-	  ret = false;
-	else
-	  {
-	    if (!netlist.len)
-	      {
-		netlist.data[0] = r.network;
-		netlist.len = 1;
-	      }
-	    for (k = 0; k < netlist.len; ++k)
-	      {
-		if (j < rl->capacity)
-		  {
-		    r.network = netlist.data[k];
-		    rl->routes[j++] = r;
-		  }
-		else
-		  {
-		    if (!warned)
-		      {
-			msg (M_WARN, PACKAGE_NAME " ROUTE: routes dropped because number of expanded routes is greater than route list capacity (%d)", rl->capacity);
-			warned = true;
-		      }
-		  }
-	      }
-	  }
-      }
-    rl->n = j;
-  }
-
-  gc_free (&gc);
-  return ret;
-}
-
-static void
-add_route3 (in_addr_t network,
-	    in_addr_t netmask,
-	    in_addr_t gateway,
-	    const struct tuntap *tt,
-	    unsigned int flags,
-	    const struct env_set *es)
-{
-  struct route r;
-  CLEAR (r);
-  r.defined = true;
-  r.network = network;
-  r.netmask = netmask;
-  r.gateway = gateway;
-  add_route (&r, tt, flags, es);
-}
-
-static void
-del_route3 (in_addr_t network,
-	    in_addr_t netmask,
-	    in_addr_t gateway,
-	    const struct tuntap *tt,
-	    unsigned int flags,
-	    const struct env_set *es)
-{
-  struct route r;
-  CLEAR (r);
-  r.defined = true;
-  r.network = network;
-  r.netmask = netmask;
-  r.gateway = gateway;
-  delete_route (&r, tt, flags, es);
-}
-
-static void
-add_bypass_routes (struct route_bypass *rb,
-		   in_addr_t gateway,
-		   const struct tuntap *tt,
-		   unsigned int flags,
-		   const struct env_set *es)
-{
-  int i;
-  for (i = 0; i < rb->n_bypass; ++i)
-    {
-      if (rb->bypass[i] != gateway)
-	add_route3 (rb->bypass[i],
-		    ~0,
-		    gateway,
-		    tt,
-		    flags,
-		    es);
-    }
-}
-
-static void
-del_bypass_routes (struct route_bypass *rb,
-		   in_addr_t gateway,
-		   const struct tuntap *tt,
-		   unsigned int flags,
-		   const struct env_set *es)
-{
-  int i;
-  for (i = 0; i < rb->n_bypass; ++i)
-    {
-      if (rb->bypass[i] != gateway)
-	del_route3 (rb->bypass[i],
-		    ~0,
-		    gateway,
-		    tt,
-		    flags,
-		    es);
-    }
-}
-
-static void
-redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
-{
-  const char err[] = "NOTE: unable to redirect default gateway --";
-
-  if (rl->flags & RG_ENABLE)
-    {
-      if (!rl->spec.remote_endpoint_defined)
-	{
-	  msg (M_WARN, "%s VPN gateway parameter (--route-gateway or --ifconfig) is missing", err);
-	}
-      else if (!rl->spec.net_gateway_defined)
-	{
-	  msg (M_WARN, "%s Cannot read current default gateway from system", err);
-	}
-      else if (!rl->spec.remote_host_defined)
-	{
-	  msg (M_WARN, "%s Cannot obtain current remote host address", err);
-	}
-      else
-	{
-	  bool local = BOOL_CAST(rl->flags & RG_LOCAL);
-	  if (rl->flags & RG_AUTO_LOCAL) {
-	    const int tla = test_local_addr (rl->spec.remote_host);
-	    if (tla == TLA_NONLOCAL)
-	      {
-		dmsg (D_ROUTE, "ROUTE remote_host is NOT LOCAL");
-		local = false;
-	      }
-	    else if (tla == TLA_LOCAL)
-	      {
-		dmsg (D_ROUTE, "ROUTE remote_host is LOCAL");
-		local = true;
-	      }
-	  }
-	  if (!local)
-	    {
-	      /* route remote host to original default gateway */
-	      add_route3 (rl->spec.remote_host,
-			  ~0,
-			  rl->spec.net_gateway,
-			  tt,
-			  flags,
-			  es);
-	      rl->did_local = true;
-	    }
-
-	  /* route DHCP/DNS server traffic through original default gateway */
-	  add_bypass_routes (&rl->spec.bypass, rl->spec.net_gateway, tt, flags, es);
-
-	  if (rl->flags & RG_REROUTE_GW)
-	    {
-	      if (rl->flags & RG_DEF1)
-		{
-		  /* add new default route (1st component) */
-		  add_route3 (0x00000000,
-			      0x80000000,
-			      rl->spec.remote_endpoint,
-			      tt,
-			      flags,
-			      es);
-
-		  /* add new default route (2nd component) */
-		  add_route3 (0x80000000,
-			      0x80000000,
-			      rl->spec.remote_endpoint,
-			      tt,
-			      flags,
-			      es);
-		}
-	      else
-		{
-		  /* delete default route */
-		  del_route3 (0,
-			      0,
-			      rl->spec.net_gateway,
-			      tt,
-			      flags,
-			      es);
-
-		  /* add new default route */
-		  add_route3 (0,
-			      0,
-			      rl->spec.remote_endpoint,
-			      tt,
-			      flags,
-			      es);
-		}
-	    }
-
-	  /* set a flag so we can undo later */
-	  rl->did_redirect_default_gateway = true;
-	}
-    }
-}
-
-static void
-undo_redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
-{
-  if (rl->did_redirect_default_gateway)
-    {
-      /* delete remote host route */
-      if (rl->did_local)
-	{
-	  del_route3 (rl->spec.remote_host,
-		      ~0,
-		      rl->spec.net_gateway,
-		      tt,
-		      flags,
-		      es);
-	  rl->did_local = false;
-	}
-
-      /* delete special DHCP/DNS bypass route */
-      del_bypass_routes (&rl->spec.bypass, rl->spec.net_gateway, tt, flags, es);
-
-      if (rl->flags & RG_REROUTE_GW)
-	{
-	  if (rl->flags & RG_DEF1)
-	    {
-	      /* delete default route (1st component) */
-	      del_route3 (0x00000000,
-			  0x80000000,
-			  rl->spec.remote_endpoint,
-			  tt,
-			  flags,
-			  es);
-
-	      /* delete default route (2nd component) */
-	      del_route3 (0x80000000,
-			  0x80000000,
-			  rl->spec.remote_endpoint,
-			  tt,
-			  flags,
-			  es);
-	    }
-	  else
-	    {
-	      /* delete default route */
-	      del_route3 (0,
-			  0,
-			  rl->spec.remote_endpoint,
-			  tt,
-			  flags,
-			  es);
-
-	      /* restore original default route */
-	      add_route3 (0,
-			  0,
-			  rl->spec.net_gateway,
-			  tt,
-			  flags,
-			  es);
-	    }
-	}
-
-      rl->did_redirect_default_gateway = false;
-    }
-}
-
-void
-add_routes (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
-{
-  redirect_default_route_to_vpn (rl, tt, flags, es);
-  if (!rl->routes_added)
-    {
-      int i;
-
-#ifdef ENABLE_MANAGEMENT
-      if (management && rl->n)
-	{
-	  management_set_state (management,
-				OPENVPN_STATE_ADD_ROUTES,
-				NULL,
-				0,
-				0);
-	}
-#endif
-      
-      for (i = 0; i < rl->n; ++i)
-	{
-	  struct route *r = &rl->routes[i];
-	  check_subnet_conflict (r->network, r->netmask, "route");
-	  if (flags & ROUTE_DELETE_FIRST)
-	    delete_route (r, tt, flags, es);
-	  add_route (r, tt, flags, es);
-	}
-      rl->routes_added = true;
-    }
-}
-
-void
-delete_routes (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
-{
-  if (rl->routes_added)
-    {
-      int i;
-      for (i = rl->n - 1; i >= 0; --i)
-	{
-	  const struct route *r = &rl->routes[i];
-	  delete_route (r, tt, flags, es);
-	}
-      rl->routes_added = false;
-    }
-  undo_redirect_default_route_to_vpn (rl, tt, flags, es);
-
-  clear_route_list (rl);
-}
-
-#ifdef ENABLE_DEBUG
-
-static const char *
-show_opt (const char *option)
-{
-  if (!option)
-    return "nil";
-  else
-    return option;
-}
-
-static void
-print_route_option (const struct route_option *ro, int level)
-{
-  msg (level, "  route %s/%s/%s/%s",
-       show_opt (ro->network),
-       show_opt (ro->netmask),
-       show_opt (ro->gateway),
-       show_opt (ro->metric));
-}
-
-void
-print_route_options (const struct route_option_list *rol,
-		     int level)
-{
-  int i;
-  if (rol->flags & RG_ENABLE)
-    msg (level, "  [redirect_default_gateway local=%d]",
-	 (rol->flags & RG_LOCAL) != 0);
-  for (i = 0; i < rol->n; ++i)
-    print_route_option (&rol->routes[i], level);
-}
-
-#endif
-
-static void
-print_route (const struct route *r, int level)
-{
-  struct gc_arena gc = gc_new ();
-  if (r->defined)
-    msg (level, "%s", route_string (r, &gc));
-  gc_free (&gc);
-}
-
-void
-print_routes (const struct route_list *rl, int level)
-{
-  int i;
-  for (i = 0; i < rl->n; ++i)
-    print_route (&rl->routes[i], level);
-}
-
-static void
-setenv_route (struct env_set *es, const struct route *r, int i)
-{
-  struct gc_arena gc = gc_new ();
-  if (r->defined)
-    {
-      setenv_route_addr (es, "network", r->network, i);
-      setenv_route_addr (es, "netmask", r->netmask, i);
-      setenv_route_addr (es, "gateway", r->gateway, i);
-
-      if (r->metric_defined)
-	{
-	  struct buffer name = alloc_buf_gc (256, &gc);
-	  buf_printf (&name, "route_metric_%d", i);
-	  setenv_int (es, BSTR (&name), r->metric);
-	}
-    }
-  gc_free (&gc);
-}
-
-void
-setenv_routes (struct env_set *es, const struct route_list *rl)
-{
-  int i;
-  for (i = 0; i < rl->n; ++i)
-    setenv_route (es, &rl->routes[i], i + 1);
-}
-
-void
-add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
-{
-  struct gc_arena gc;
-  struct argv argv;
-  const char *network;
-  const char *netmask;
-  const char *gateway;
-  bool status = false;
-
-  if (!r->defined)
-    return;
-
-  gc_init (&gc);
-  argv_init (&argv);
-
-  network = print_in_addr_t (r->network, 0, &gc);
-  netmask = print_in_addr_t (r->netmask, 0, &gc);
-  gateway = print_in_addr_t (r->gateway, 0, &gc);
-
-  /*
-   * Filter out routes which are essentially no-ops
-   */
-  if (r->network == r->gateway && r->netmask == 0xFFFFFFFF)
-    {
-      msg (M_INFO, PACKAGE_NAME " ROUTE: omitted no-op route: %s/%s -> %s",
-	   network, netmask, gateway);
-      goto done;
-    }
-
-#if defined(TARGET_LINUX)
-#ifdef CONFIG_FEATURE_IPROUTE
-  argv_printf (&argv, "%s route add %s/%d via %s",
-  	      iproute_path,
-	      network,
-	      count_netmask_bits(netmask),
-	      gateway);
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "metric %d", r->metric);
-
-#else
-  argv_printf (&argv, "%s add -net %s netmask %s gw %s",
-		ROUTE_PATH,
-	      network,
-	      netmask,
-	      gateway);
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "metric %d", r->metric);
-#endif  /*CONFIG_FEATURE_IPROUTE*/
-  argv_msg (D_ROUTE, &argv);
-  status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route add command failed");
-
-#elif defined (WIN32)
-
-  argv_printf (&argv, "%s%sc ADD %s MASK %s %s",
-	       get_win_sys_path(),
-	       WIN_ROUTE_PATH_SUFFIX,
-	       network,
-	       netmask,
-	       gateway);
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "METRIC %d", r->metric);
-
-  argv_msg (D_ROUTE, &argv);
-
-  if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI)
-    {
-      status = add_route_ipapi (r, tt);
-      msg (D_ROUTE, "Route addition via IPAPI %s", status ? "succeeded" : "failed");
-    }
-  else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE)
-    {
-      netcmd_semaphore_lock ();
-      status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed");
-      netcmd_semaphore_release ();
-    }
-  else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE)
-    {
-      status = add_route_ipapi (r, tt);
-      msg (D_ROUTE, "Route addition via IPAPI %s [adaptive]", status ? "succeeded" : "failed");
-      if (!status)
-	{
-	  msg (D_ROUTE, "Route addition fallback to route.exe");
-	  netcmd_semaphore_lock ();
-	  status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed [adaptive]");
-	  netcmd_semaphore_release ();
-	}
-    }
-  else
-    {
-      ASSERT (0);
-    }
-
-#elif defined (TARGET_SOLARIS)
-
-  /* example: route add 192.0.2.32 -netmask 255.255.255.224 somegateway */
-
-  argv_printf (&argv, "%s add",
-		ROUTE_PATH);
-
-  argv_printf_cat (&argv, "%s -netmask %s %s",
-	      network,
-	      netmask,
-	      gateway);
-
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "%d", r->metric);
-
-  argv_msg (D_ROUTE, &argv);
-  status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add command failed");
-
-#elif defined(TARGET_FREEBSD)
-
-  argv_printf (&argv, "%s add",
-		ROUTE_PATH);
-
-#if 0
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "-rtt %d", r->metric);
-#endif
-
-  argv_printf_cat (&argv, "-net %s %s %s",
-	      network,
-	      gateway,
-	      netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  status = openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route add command failed");
-
-#elif defined(TARGET_DRAGONFLY)
-
-  argv_printf (&argv, "%s add",
-		ROUTE_PATH);
-
-#if 0
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "-rtt %d", r->metric);
-#endif
-
-  argv_printf_cat (&argv, "-net %s %s %s",
-	      network,
-	      gateway,
-	      netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  status = openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route add command failed");
-
-#elif defined(TARGET_DARWIN)
-
-  argv_printf (&argv, "%s add",
-		ROUTE_PATH);
-
-#if 0
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "-rtt %d", r->metric);
-#endif
-
-  argv_printf_cat (&argv, "-net %s %s %s",
-              network,
-              gateway,
-              netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  status = openvpn_execve_check (&argv, es, 0, "ERROR: OS X route add command failed");
-
-#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
-
-  argv_printf (&argv, "%s add",
-		ROUTE_PATH);
-
-#if 0
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "-rtt %d", r->metric);
-#endif
-
-  argv_printf_cat (&argv, "-net %s %s -netmask %s",
-	      network,
-	      gateway,
-	      netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route add command failed");
-
-#else
-  msg (M_FATAL, "Sorry, but I don't know how to do 'route' commands on this operating system.  Try putting your routes in a --route-up script");
-#endif
-
- done:
-  r->defined = status;
-  argv_reset (&argv);
-  gc_free (&gc);
-}
-
-static void
-delete_route (const struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
-{
-  struct gc_arena gc;
-  struct argv argv;
-  const char *network;
-  const char *netmask;
-  const char *gateway;
-
-  if (!r->defined)
-    return;
-
-  gc_init (&gc);
-  argv_init (&argv);
-
-  network = print_in_addr_t (r->network, 0, &gc);
-  netmask = print_in_addr_t (r->netmask, 0, &gc);
-  gateway = print_in_addr_t (r->gateway, 0, &gc);
-
-#if defined(TARGET_LINUX)
-#ifdef CONFIG_FEATURE_IPROUTE
-  argv_printf (&argv, "%s route del %s/%d",
-  	      iproute_path,
-	      network,
-	      count_netmask_bits(netmask));
-#else
-
-  argv_printf (&argv, "%s del -net %s netmask %s",
-		ROUTE_PATH,
-	      network,
-	      netmask);
-#endif /*CONFIG_FEATURE_IPROUTE*/
-  if (r->metric_defined)
-    argv_printf_cat (&argv, "metric %d", r->metric);
-  argv_msg (D_ROUTE, &argv);
-  openvpn_execve_check (&argv, es, 0, "ERROR: Linux route delete command failed");
-
-#elif defined (WIN32)
-  
-  argv_printf (&argv, "%s%sc DELETE %s MASK %s %s",
-	       get_win_sys_path(),
-	       WIN_ROUTE_PATH_SUFFIX,
-	       network,
-	       netmask,
-	       gateway);
-
-  argv_msg (D_ROUTE, &argv);
-
-  if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI)
-    {
-      const bool status = del_route_ipapi (r, tt);
-      msg (D_ROUTE, "Route deletion via IPAPI %s", status ? "succeeded" : "failed");
-    }
-  else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE)
-    {
-      netcmd_semaphore_lock ();
-      openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed");
-      netcmd_semaphore_release ();
-    }
-  else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE)
-    {
-      const bool status = del_route_ipapi (r, tt);
-      msg (D_ROUTE, "Route deletion via IPAPI %s [adaptive]", status ? "succeeded" : "failed");
-      if (!status)
-	{
-	  msg (D_ROUTE, "Route deletion fallback to route.exe");
-	  netcmd_semaphore_lock ();
-	  openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed [adaptive]");
-	  netcmd_semaphore_release ();
-	}
-    }
-  else
-    {
-      ASSERT (0);
-    }
-
-#elif defined (TARGET_SOLARIS)
-
-  argv_printf (&argv, "%s delete %s -netmask %s %s",
-		ROUTE_PATH,
-	      network,
-	      netmask,
-	      gateway);
-
-  argv_msg (D_ROUTE, &argv);
-  openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete command failed");
-
-#elif defined(TARGET_FREEBSD)
-
-  argv_printf (&argv, "%s delete -net %s %s %s",
-		ROUTE_PATH,
-	      network,
-	      gateway,
-	      netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route delete command failed");
-
-#elif defined(TARGET_DRAGONFLY)
-
-  argv_printf (&argv, "%s delete -net %s %s %s",
-		ROUTE_PATH,
-	      network,
-	      gateway,
-	      netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route delete command failed");
-
-#elif defined(TARGET_DARWIN)
-
-  argv_printf (&argv, "%s delete -net %s %s %s",
-		ROUTE_PATH,
-              network,
-              gateway,
-              netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  openvpn_execve_check (&argv, es, 0, "ERROR: OS X route delete command failed");
-
-#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
-
-  argv_printf (&argv, "%s delete -net %s %s -netmask %s",
-		ROUTE_PATH,
-	      network,
-	      gateway,
-	      netmask);
-
-  argv_msg (D_ROUTE, &argv);
-  openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route delete command failed");
-
-#else
-  msg (M_FATAL, "Sorry, but I don't know how to do 'route' commands on this operating system.  Try putting your routes in a --route-up script");
-#endif
-
-  argv_reset (&argv);
-  gc_free (&gc);
-}
-
-/*
- * The --redirect-gateway option requires OS-specific code below
- * to get the current default gateway.
- */
-
-#if defined(WIN32)
-
-static const MIB_IPFORWARDTABLE *
-get_windows_routing_table (struct gc_arena *gc)
-{
-  ULONG size = 0;
-  PMIB_IPFORWARDTABLE rt = NULL;
-  DWORD status;
-
-  status = GetIpForwardTable (NULL, &size, TRUE);
-  if (status == ERROR_INSUFFICIENT_BUFFER)
-    {
-      rt = (PMIB_IPFORWARDTABLE) gc_malloc (size, false, gc);
-      status = GetIpForwardTable (rt, &size, TRUE);
-      if (status != NO_ERROR)
-	{
-	  msg (D_ROUTE, "NOTE: GetIpForwardTable returned error: %s (code=%u)",
-	       strerror_win32 (status, gc),
-	       (unsigned int)status);
-	  rt = NULL;
-	}
-    }
-  return rt;
-}
-
-static int
-test_route (const IP_ADAPTER_INFO *adapters,
-	    const in_addr_t gateway,
-	    DWORD *index)
-{
-  int count = 0;
-  DWORD i = adapter_index_of_ip (adapters, gateway, &count, NULL);
-  if (index)
-    *index = i;
-  return count;
-}
-
-static void
-test_route_helper (bool *ret,
-		   int *count,
-		   int *good,
-		   int *ambig,
-		   const IP_ADAPTER_INFO *adapters,
-		   const in_addr_t gateway)
-{
-  int c;
-
-  ++*count;
-  c = test_route (adapters, gateway, NULL);
-  if (c == 0)
-    *ret = false;
-  else
-    ++*good;
-  if (c > 1)
-    ++*ambig;
-}
-
-/*
- * If we tried to add routes now, would we succeed?
- */
-bool
-test_routes (const struct route_list *rl, const struct tuntap *tt)
-{
-  struct gc_arena gc = gc_new ();
-  const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
-  bool ret = false;
-  int count = 0;
-  int good = 0;
-  int ambig = 0;
-  bool adapter_up = false;
-
-  if (is_adapter_up (tt, adapters))
-    {
-      ret = true;
-      adapter_up = true;
-
-      if (rl)
-	{
-	  int i;
-	  for (i = 0; i < rl->n; ++i)
-	    test_route_helper (&ret, &count, &good, &ambig, adapters, rl->routes[i].gateway);
-
-	  if ((rl->flags & RG_ENABLE) && rl->spec.remote_endpoint_defined)
-	    test_route_helper (&ret, &count, &good, &ambig, adapters, rl->spec.remote_endpoint);
-	}
-    }
-
-  msg (D_ROUTE, "TEST ROUTES: %d/%d succeeded len=%d ret=%d a=%d u/d=%s",
-       good,
-       count,
-       rl ? rl->n : -1,
-       (int)ret,
-       ambig,
-       adapter_up ? "up" : "down");
-
-  gc_free (&gc);
-  return ret;
-}
-
-static const MIB_IPFORWARDROW *
-get_default_gateway_row (const MIB_IPFORWARDTABLE *routes)
-{
-  struct gc_arena gc = gc_new ();
-  DWORD lowest_metric = ~0;
-  const MIB_IPFORWARDROW *ret = NULL;
-  int i;
-  int best = -1;
-
-  if (routes)
-    {
-      for (i = 0; i < routes->dwNumEntries; ++i)
-	{
-	  const MIB_IPFORWARDROW *row = &routes->table[i];
-	  const in_addr_t net = ntohl (row->dwForwardDest);
-	  const in_addr_t mask = ntohl (row->dwForwardMask);
-	  const DWORD index = row->dwForwardIfIndex;
-	  const DWORD metric = row->dwForwardMetric1;
-
-	  dmsg (D_ROUTE_DEBUG, "GDGR: route[%d] %s/%s i=%d m=%d",
-		i,
-		print_in_addr_t ((in_addr_t) net, 0, &gc),
-		print_in_addr_t ((in_addr_t) mask, 0, &gc),
-		(int)index,
-		(int)metric);
-
-	  if (!net && !mask && metric < lowest_metric)
-	    {
-	      ret = row;
-	      lowest_metric = metric;
-	      best = i;
-	    }
-	}
-    }
-
-  dmsg (D_ROUTE_DEBUG, "GDGR: best=%d lm=%u", best, (unsigned int)lowest_metric);
-
-  gc_free (&gc);
-  return ret;
-}
-
-bool
-get_default_gateway (in_addr_t *gw, in_addr_t *netmask)
-{
-  struct gc_arena gc = gc_new ();
-  bool ret_bool = false;
-
-  const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
-  const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc);
-  const MIB_IPFORWARDROW *row = get_default_gateway_row (routes);
-
-  if (row)
-    {
-      *gw = ntohl (row->dwForwardNextHop);
-      if (netmask)
-	{
-	  if (adapter_index_of_ip (adapters, *gw, NULL, netmask) == ~0)
-	    *netmask = ~0;
-	}
-      ret_bool = true;
-    }
-
-  gc_free (&gc);
-  return ret_bool;
-}
-
-static DWORD
-windows_route_find_if_index (const struct route *r, const struct tuntap *tt)
-{
-  struct gc_arena gc = gc_new ();
-  DWORD ret = ~0;
-  int count = 0;
-  const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
-  const IP_ADAPTER_INFO *tun_adapter = get_tun_adapter (tt, adapters);
-  bool on_tun = false;
-
-  /* first test on tun interface */
-  if (is_ip_in_adapter_subnet (tun_adapter, r->gateway, NULL))
-    {
-      ret = tun_adapter->Index;
-      count = 1;
-      on_tun = true;
-    }
-  else /* test on other interfaces */
-    {
-      count = test_route (adapters, r->gateway, &ret);
-    }
-
-  if (count == 0)
-    {
-      msg (M_WARN, "Warning: route gateway is not reachable on any active network adapters: %s",
-	   print_in_addr_t (r->gateway, 0, &gc));
-      ret = ~0;
-    }
-  else if (count > 1)
-    {
-      msg (M_WARN, "Warning: route gateway is ambiguous: %s (%d matches)",
-	   print_in_addr_t (r->gateway, 0, &gc),
-	   count);
-      ret = ~0;
-    }
-
-  dmsg (D_ROUTE_DEBUG, "DEBUG: route find if: on_tun=%d count=%d index=%d",
-       on_tun,
-       count,
-       (int)ret);
-
-  gc_free (&gc);
-  return ret;
-}
-
-bool
-add_route_ipapi (const struct route *r, const struct tuntap *tt)
-{
-  struct gc_arena gc = gc_new ();
-  bool ret = false;
-  DWORD status;
-  const DWORD if_index = windows_route_find_if_index (r, tt);  
-
-  if (if_index != ~0)
-    {
-      MIB_IPFORWARDROW fr;
-      CLEAR (fr);
-      fr.dwForwardDest = htonl (r->network);
-      fr.dwForwardMask = htonl (r->netmask);
-      fr.dwForwardPolicy = 0;
-      fr.dwForwardNextHop = htonl (r->gateway);
-      fr.dwForwardIfIndex = if_index;
-      fr.dwForwardType = 4;  /* the next hop is not the final dest */
-      fr.dwForwardProto = 3; /* PROTO_IP_NETMGMT */
-      fr.dwForwardAge = 0;
-      fr.dwForwardNextHopAS = 0;
-      fr.dwForwardMetric1 = r->metric_defined ? r->metric : 1;
-      fr.dwForwardMetric2 = ~0;
-      fr.dwForwardMetric3 = ~0;
-      fr.dwForwardMetric4 = ~0;
-      fr.dwForwardMetric5 = ~0;
-
-      if ((r->network & r->netmask) != r->network)
-	msg (M_WARN, "Warning: address %s is not a network address in relation to netmask %s",
-	     print_in_addr_t (r->network, 0, &gc),
-	     print_in_addr_t (r->netmask, 0, &gc));
-
-      status = CreateIpForwardEntry (&fr);
-
-      if (status == NO_ERROR)
-	ret = true;
-      else
-	{
-	  /* failed, try increasing the metric to work around Vista issue */
-	  const unsigned int forward_metric_limit = 2048; /* iteratively retry higher metrics up to this limit */
-
-	  for ( ; fr.dwForwardMetric1 <= forward_metric_limit; ++fr.dwForwardMetric1)
-	    {
-	      /* try a different forward type=3 ("the next hop is the final dest") in addition to 4.
-		 --redirect-gateway over RRAS seems to need this. */
-	      for (fr.dwForwardType = 4; fr.dwForwardType >= 3; --fr.dwForwardType)
-		{
-		  status = CreateIpForwardEntry (&fr);
-		  if (status == NO_ERROR)
-		    {
-		      msg (D_ROUTE, "ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=%u and dwForwardType=%u",
-			   (unsigned int)fr.dwForwardMetric1,
-			   (unsigned int)fr.dwForwardType);
-		      ret = true;
-		      goto doublebreak;
-		    }
-		  else if (status != ERROR_BAD_ARGUMENTS)
-		    goto doublebreak;
-		}
-	    }
-
-	doublebreak:
-	  if (status != NO_ERROR)
-	    msg (M_WARN, "ROUTE: route addition failed using CreateIpForwardEntry: %s [status=%u if_index=%u]",
-		 strerror_win32 (status, &gc),
-		 (unsigned int)status,
-		 (unsigned int)if_index);
-	}
-    }
-
-  gc_free (&gc);
-  return ret;
-}
-
-bool
-del_route_ipapi (const struct route *r, const struct tuntap *tt)
-{
-  struct gc_arena gc = gc_new ();
-  bool ret = false;
-  DWORD status;
-  const DWORD if_index = windows_route_find_if_index (r, tt);
-
-  if (if_index != ~0)
-    {
-      MIB_IPFORWARDROW fr;
-      CLEAR (fr);
-
-      fr.dwForwardDest = htonl (r->network);
-      fr.dwForwardMask = htonl (r->netmask);
-      fr.dwForwardPolicy = 0;
-      fr.dwForwardNextHop = htonl (r->gateway);
-      fr.dwForwardIfIndex = if_index;
-
-      status = DeleteIpForwardEntry (&fr);
-
-      if (status == NO_ERROR)
-	ret = true;
-      else
-	msg (M_WARN, "ROUTE: route deletion failed using DeleteIpForwardEntry: %s",
-	     strerror_win32 (status, &gc));
-    }
-
-  gc_free (&gc);
-  return ret;
-}
-
-static const char *
-format_route_entry (const MIB_IPFORWARDROW *r, struct gc_arena *gc)
-{
-  struct buffer out = alloc_buf_gc (256, gc);
-  buf_printf (&out, "%s %s %s p=%d i=%d t=%d pr=%d a=%d h=%d m=%d/%d/%d/%d/%d", 
-	      print_in_addr_t (r->dwForwardDest, IA_NET_ORDER, gc),
-	      print_in_addr_t (r->dwForwardMask, IA_NET_ORDER, gc),
-	      print_in_addr_t (r->dwForwardNextHop, IA_NET_ORDER, gc),
-	      (int)r->dwForwardPolicy,
-	      (int)r->dwForwardIfIndex,
-	      (int)r->dwForwardType,
-	      (int)r->dwForwardProto,
-	      (int)r->dwForwardAge,
-	      (int)r->dwForwardNextHopAS,
-	      (int)r->dwForwardMetric1,
-	      (int)r->dwForwardMetric2,
-	      (int)r->dwForwardMetric3,
-	      (int)r->dwForwardMetric4,
-	      (int)r->dwForwardMetric5);
-  return BSTR (&out);
-}
-
-/*
- * Show current routing table
- */
-void
-show_routes (int msglev)
-{
-  struct gc_arena gc = gc_new ();
-  int i;
-
-  const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc);
-
-  msg (msglev, "SYSTEM ROUTING TABLE");
-  if (rt)
-    {
-      for (i = 0; i < rt->dwNumEntries; ++i)
-	{
-	  msg (msglev, "%s", format_route_entry (&rt->table[i], &gc));
-	}
-    }
-  gc_free (&gc);
-}
-
-#elif defined(TARGET_LINUX)
-
-bool
-get_default_gateway (in_addr_t *gateway, in_addr_t *netmask)
-{
-  struct gc_arena gc = gc_new ();
-  bool ret = false;
-  FILE *fp = fopen ("/proc/net/route", "r");
-  if (fp)
-    {
-      char line[256];
-      int count = 0;
-      int best_count = 0;
-      unsigned int lowest_metric = ~0;
-      in_addr_t best_gw = 0;
-      while (fgets (line, sizeof (line), fp) != NULL)
-	{
-	  if (count)
-	    {
-	      unsigned int net_x = 0;
-	      unsigned int mask_x = 0;
-	      unsigned int gw_x = 0;
-	      unsigned int metric = 0;
-	      const int np = sscanf (line, "%*s\t%x\t%x\t%*s\t%*s\t%*s\t%d\t%x",
-				     &net_x,
-				     &gw_x,
-				     &metric,
-				     &mask_x);
-	      if (np == 4)
-		{
-		  const in_addr_t net = ntohl (net_x);
-		  const in_addr_t mask = ntohl (mask_x);
-		  const in_addr_t gw = ntohl (gw_x);
-
-		  dmsg (D_ROUTE_DEBUG, "GDG: route[%d] %s/%s/%s m=%u",
-			count,
-			print_in_addr_t ((in_addr_t) net, 0, &gc),
-			print_in_addr_t ((in_addr_t) mask, 0, &gc),
-			print_in_addr_t ((in_addr_t) gw, 0, &gc),
-			metric);
-
-		  if (!net && !mask && metric < lowest_metric)
-		    {
-		      best_gw = gw;
-		      lowest_metric = metric;
-		      best_count = count;
-		    }
-		}
-	    }
-	  ++count;
-	}
-      fclose (fp);
-
-      if (best_gw)
-	{
-	  *gateway = best_gw;
-	  if (netmask)
-	    {
-	      *netmask = 0xFFFFFF00; /* FIXME -- get the real netmask of the adapter containing the default gateway */
-	    }
-	  ret = true;
-	}
-
-      dmsg (D_ROUTE_DEBUG, "GDG: best=%s[%d] lm=%u",
-	    print_in_addr_t ((in_addr_t) best_gw, 0, &gc),
-	    best_count,
-	    (unsigned int)lowest_metric);
-    }
-
-  gc_free (&gc);
-  return ret;
-}
-
-#elif defined(TARGET_FREEBSD)||defined(TARGET_DRAGONFLY)
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-
-/* all of this is taken from <net/route.h> in FreeBSD */
-#define RTA_DST     0x1
-#define RTA_GATEWAY 0x2
-#define RTA_NETMASK 0x4
-
-#define RTM_GET     0x4
-#define RTM_VERSION 5
-
-#define RTF_UP      0x1
-#define RTF_GATEWAY 0x2
-
-/*
- * These numbers are used by reliable protocols for determining
- * retransmission behavior and are included in the routing structure.
- */
-struct rt_metrics {
-        u_long  rmx_locks;      /* Kernel must leave these values alone */
-        u_long  rmx_mtu;        /* MTU for this path */
-        u_long  rmx_hopcount;   /* max hops expected */
-        u_long  rmx_expire;     /* lifetime for route, e.g. redirect */
-        u_long  rmx_recvpipe;   /* inbound delay-bandwidth product */
-        u_long  rmx_sendpipe;   /* outbound delay-bandwidth product */
-        u_long  rmx_ssthresh;   /* outbound gateway buffer limit */
-        u_long  rmx_rtt;        /* estimated round trip time */
-        u_long  rmx_rttvar;     /* estimated rtt variance */
-        u_long  rmx_pksent;     /* packets sent using this route */
-        u_long  rmx_filler[4];  /* will be used for T/TCP later */
-};
-
-/*
- * Structures for routing messages.
- */
-struct rt_msghdr {
-        u_short rtm_msglen;     /* to skip over non-understood messages */
-        u_char  rtm_version;    /* future binary compatibility */
-        u_char  rtm_type;       /* message type */
-        u_short rtm_index;      /* index for associated ifp */
-        int     rtm_flags;      /* flags, incl. kern & message, e.g. DONE */
-        int     rtm_addrs;      /* bitmask identifying sockaddrs in msg */
-        pid_t   rtm_pid;        /* identify sender */
-        int     rtm_seq;        /* for sender to identify action */
-        int     rtm_errno;      /* why failed */
-        int     rtm_use;        /* from rtentry */
-        u_long  rtm_inits;      /* which metrics we are initializing */
-        struct  rt_metrics rtm_rmx; /* metrics themselves */
-};
-
-struct {
-  struct rt_msghdr m_rtm;
-  char       m_space[512];
-} m_rtmsg;
-
-#define ROUNDUP(a) \
-        ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
-
-bool
-get_default_gateway (in_addr_t *ret, in_addr_t *netmask)
-{
-  struct gc_arena gc = gc_new ();
-  int s, seq, l, pid, rtm_addrs, i;
-  struct sockaddr so_dst, so_mask;
-  char *cp = m_rtmsg.m_space; 
-  struct sockaddr *gate = NULL, *sa;
-  struct  rt_msghdr *rtm_aux;
-
-#define NEXTADDR(w, u) \
-        if (rtm_addrs & (w)) {\
-            l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
-        }
-
-#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
-
-#define rtm m_rtmsg.m_rtm
-
-  pid = getpid();
-  seq = 0;
-  rtm_addrs = RTA_DST | RTA_NETMASK;
-
-  bzero(&so_dst, sizeof(so_dst));
-  bzero(&so_mask, sizeof(so_mask));
-  bzero(&rtm, sizeof(struct rt_msghdr));
-
-  rtm.rtm_type = RTM_GET;
-  rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
-  rtm.rtm_version = RTM_VERSION;
-  rtm.rtm_seq = ++seq;
-  rtm.rtm_addrs = rtm_addrs; 
-
-  so_dst.sa_family = AF_INET;
-  so_dst.sa_len = sizeof(struct sockaddr_in);
-  so_mask.sa_family = AF_INET;
-  so_mask.sa_len = sizeof(struct sockaddr_in);
-
-  NEXTADDR(RTA_DST, so_dst);
-  NEXTADDR(RTA_NETMASK, so_mask);
-
-  rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
-
-  s = socket(PF_ROUTE, SOCK_RAW, 0);
-
-  if (write(s, (char *)&m_rtmsg, l) < 0)
-    {
-      warn("writing to routing socket");
-      gc_free (&gc);
-      close(s);
-      return false;
-    }
-
-  do {
-    l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
-  } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
-                        
-  close(s);
-
-  rtm_aux = &rtm;
-
-  cp = ((char *)(rtm_aux + 1));
-  if (rtm_aux->rtm_addrs) {
-    for (i = 1; i; i <<= 1)
-      if (i & rtm_aux->rtm_addrs) {
-	sa = (struct sockaddr *)cp;
-	if (i == RTA_GATEWAY )
-	  gate = sa;
-	ADVANCE(cp, sa);
-      }
-  }
-  else
-    {
-      gc_free (&gc);
-      return false;
-    }
-
-
-  if (gate != NULL )
-    {
-      *ret = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
-#if 0
-      msg (M_INFO, "gw %s",
-	   print_in_addr_t ((in_addr_t) *ret, 0, &gc));
-#endif
-
-      if (netmask)
-	{
-	  *netmask = 0xFFFFFF00; // FIXME -- get the real netmask of the adapter containing the default gateway
-	}
-
-      gc_free (&gc);
-      return true;
-    }
-  else
-    {
-      gc_free (&gc);
-      return false;
-    }
-}
-
-#elif defined(TARGET_DARWIN)
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-
-/* all of this is taken from <net/route.h> in Darwin */
-#define RTA_DST     0x1
-#define RTA_GATEWAY 0x2
-#define RTA_NETMASK 0x4
-
-#define RTM_GET     0x4
-#define RTM_VERSION 5
-
-#define RTF_UP      0x1
-#define RTF_GATEWAY 0x2
-
-/*
- * These numbers are used by reliable protocols for determining
- * retransmission behavior and are included in the routing structure.
- */
-struct rt_metrics {
-        u_long  rmx_locks;      /* Kernel must leave these values alone */
-        u_long  rmx_mtu;        /* MTU for this path */
-        u_long  rmx_hopcount;   /* max hops expected */
-        u_long  rmx_expire;     /* lifetime for route, e.g. redirect */
-        u_long  rmx_recvpipe;   /* inbound delay-bandwidth product */
-        u_long  rmx_sendpipe;   /* outbound delay-bandwidth product */
-        u_long  rmx_ssthresh;   /* outbound gateway buffer limit */
-        u_long  rmx_rtt;        /* estimated round trip time */
-        u_long  rmx_rttvar;     /* estimated rtt variance */
-        u_long  rmx_pksent;     /* packets sent using this route */
-        u_long  rmx_filler[4];  /* will be used for T/TCP later */
-};
-
-/*
- * Structures for routing messages.
- */
-struct rt_msghdr {
-        u_short rtm_msglen;     /* to skip over non-understood messages */
-        u_char  rtm_version;    /* future binary compatibility */
-        u_char  rtm_type;       /* message type */
-        u_short rtm_index;      /* index for associated ifp */
-        int     rtm_flags;      /* flags, incl. kern & message, e.g. DONE */
-        int     rtm_addrs;      /* bitmask identifying sockaddrs in msg */
-        pid_t   rtm_pid;        /* identify sender */
-        int     rtm_seq;        /* for sender to identify action */
-        int     rtm_errno;      /* why failed */
-        int     rtm_use;        /* from rtentry */
-        u_long  rtm_inits;      /* which metrics we are initializing */
-        struct  rt_metrics rtm_rmx; /* metrics themselves */
-};
-
-struct {
-  struct rt_msghdr m_rtm;
-  char       m_space[512];
-} m_rtmsg;
-
-#define ROUNDUP(a) \
-        ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
-
-bool
-get_default_gateway (in_addr_t *ret, in_addr_t *netmask)
-{
-  struct gc_arena gc = gc_new ();
-  int s, seq, l, pid, rtm_addrs, i;
-  struct sockaddr so_dst, so_mask;
-  char *cp = m_rtmsg.m_space; 
-  struct sockaddr *gate = NULL, *sa;
-  struct  rt_msghdr *rtm_aux;
-
-#define NEXTADDR(w, u) \
-        if (rtm_addrs & (w)) {\
-            l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
-        }
-
-#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
-
-#define rtm m_rtmsg.m_rtm
-
-  pid = getpid();
-  seq = 0;
-  rtm_addrs = RTA_DST | RTA_NETMASK;
-
-  bzero(&so_dst, sizeof(so_dst));
-  bzero(&so_mask, sizeof(so_mask));
-  bzero(&rtm, sizeof(struct rt_msghdr));
-
-  rtm.rtm_type = RTM_GET;
-  rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
-  rtm.rtm_version = RTM_VERSION;
-  rtm.rtm_seq = ++seq;
-  rtm.rtm_addrs = rtm_addrs; 
-
-  so_dst.sa_family = AF_INET;
-  so_dst.sa_len = sizeof(struct sockaddr_in);
-  so_mask.sa_family = AF_INET;
-  so_mask.sa_len = sizeof(struct sockaddr_in);
-
-  NEXTADDR(RTA_DST, so_dst);
-  NEXTADDR(RTA_NETMASK, so_mask);
-
-  rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
-
-  s = socket(PF_ROUTE, SOCK_RAW, 0);
-
-  if (write(s, (char *)&m_rtmsg, l) < 0)
-    {
-      msg (M_WARN, "ROUTE: problem writing to routing socket");
-      gc_free (&gc);
-      close(s);
-      return false;
-    }
-
-  do {
-    l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
-  } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
-                        
-  close(s);
-
-  rtm_aux = &rtm;
-
-  cp = ((char *)(rtm_aux + 1));
-  if (rtm_aux->rtm_addrs) {
-    for (i = 1; i; i <<= 1)
-      if (i & rtm_aux->rtm_addrs) {
-	sa = (struct sockaddr *)cp;
-	if (i == RTA_GATEWAY )
-	  gate = sa;
-	ADVANCE(cp, sa);
-      }
-  }
-  else
-    {
-      gc_free (&gc);
-      return false;
-    }
-
-
-  if (gate != NULL )
-    {
-      *ret = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
-#if 0
-      msg (M_INFO, "gw %s",
-	   print_in_addr_t ((in_addr_t) *ret, 0, &gc));
-#endif
-
-      if (netmask)
-	{
-	  *netmask = 0xFFFFFF00; // FIXME -- get the real netmask of the adapter containing the default gateway
-	}
-
-      gc_free (&gc);
-      return true;
-    }
-  else
-    {
-      gc_free (&gc);
-      return false;
-    }
-}
-
-#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-
-/* all of this is taken from <net/route.h> in OpenBSD 3.6 */
-#define RTA_DST		0x1	/* destination sockaddr present */
-#define RTA_GATEWAY	0x2	/* gateway sockaddr present */
-#define RTA_NETMASK	0x4	/* netmask sockaddr present */
-
-#define RTM_GET		0x4	/* Report Metrics */
-
-#define RTM_VERSION	3	/* Up the ante and ignore older versions */
-
-#define	RTF_UP		0x1		/* route usable */
-#define	RTF_GATEWAY	0x2		/* destination is a gateway */
-
-/*
- * Huge version for userland compatibility.
- */
-struct rt_metrics {
-	u_long	rmx_locks;	/* Kernel must leave these values alone */
-	u_long	rmx_mtu;	/* MTU for this path */
-	u_long	rmx_hopcount;	/* max hops expected */
-	u_long	rmx_expire;	/* lifetime for route, e.g. redirect */
-	u_long	rmx_recvpipe;	/* inbound delay-bandwidth product */
-	u_long	rmx_sendpipe;	/* outbound delay-bandwidth product */
-	u_long	rmx_ssthresh;	/* outbound gateway buffer limit */
-	u_long	rmx_rtt;	/* estimated round trip time */
-	u_long	rmx_rttvar;	/* estimated rtt variance */
-	u_long	rmx_pksent;	/* packets sent using this route */
-};
-
-/*
- * Structures for routing messages.
- */
-struct rt_msghdr {
-	u_short	rtm_msglen;	/* to skip over non-understood messages */
-	u_char	rtm_version;	/* future binary compatibility */
-	u_char	rtm_type;	/* message type */
-	u_short	rtm_index;	/* index for associated ifp */
-	int	rtm_flags;	/* flags, incl. kern & message, e.g. DONE */
-	int	rtm_addrs;	/* bitmask identifying sockaddrs in msg */
-	pid_t	rtm_pid;	/* identify sender */
-	int	rtm_seq;	/* for sender to identify action */
-	int	rtm_errno;	/* why failed */
-	int	rtm_use;	/* from rtentry */
-	u_long	rtm_inits;	/* which metrics we are initializing */
-	struct	rt_metrics rtm_rmx; /* metrics themselves */
-};
-
-struct {
-  struct rt_msghdr m_rtm;
-  char       m_space[512];
-} m_rtmsg;
-
-#define ROUNDUP(a) \
-        ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
-
-bool
-get_default_gateway (in_addr_t *ret, in_addr_t *netmask)
-{
-  struct gc_arena gc = gc_new ();
-  int s, seq, l, rtm_addrs, i;
-  pid_t pid;
-  struct sockaddr so_dst, so_mask;
-  char *cp = m_rtmsg.m_space; 
-  struct sockaddr *gate = NULL, *sa;
-  struct  rt_msghdr *rtm_aux;
-
-#define NEXTADDR(w, u) \
-        if (rtm_addrs & (w)) {\
-            l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
-        }
-
-#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
-
-#define rtm m_rtmsg.m_rtm
-
-  pid = getpid();
-  seq = 0;
-  rtm_addrs = RTA_DST | RTA_NETMASK;
-
-  bzero(&so_dst, sizeof(so_dst));
-  bzero(&so_mask, sizeof(so_mask));
-  bzero(&rtm, sizeof(struct rt_msghdr));
-
-  rtm.rtm_type = RTM_GET;
-  rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
-  rtm.rtm_version = RTM_VERSION;
-  rtm.rtm_seq = ++seq;
-  rtm.rtm_addrs = rtm_addrs; 
-
-  so_dst.sa_family = AF_INET;
-  so_dst.sa_len = sizeof(struct sockaddr_in);
-  so_mask.sa_family = AF_INET;
-  so_mask.sa_len = sizeof(struct sockaddr_in);
-
-  NEXTADDR(RTA_DST, so_dst);
-  NEXTADDR(RTA_NETMASK, so_mask);
-
-  rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
-
-  s = socket(PF_ROUTE, SOCK_RAW, 0);
-
-  if (write(s, (char *)&m_rtmsg, l) < 0)
-    {
-      warn("writing to routing socket");
-      gc_free (&gc);
-      close(s);
-      return false;
-    }
-
-  do {
-    l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
-  } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
-                        
-  close(s);
-
-  rtm_aux = &rtm;
-
-  cp = ((char *)(rtm_aux + 1));
-  if (rtm_aux->rtm_addrs) {
-    for (i = 1; i; i <<= 1)
-      if (i & rtm_aux->rtm_addrs) {
-	sa = (struct sockaddr *)cp;
-	if (i == RTA_GATEWAY )
-	  gate = sa;
-	ADVANCE(cp, sa);
-      }
-  }
-  else
-    {
-      gc_free (&gc);
-      return false;
-    }
-
-
-  if (gate != NULL )
-    {
-      *ret = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
-#if 0
-      msg (M_INFO, "gw %s",
-	   print_in_addr_t ((in_addr_t) *ret, 0, &gc));
-#endif
-
-      if (netmask)
-	{
-	  *netmask = 0xFFFFFF00; // FIXME -- get the real netmask of the adapter containing the default gateway
-	}
-
-      gc_free (&gc);
-      return true;
-    }
-  else
-    {
-      gc_free (&gc);
-      return false;
-    }
-}
-
-#else
-
-bool
-get_default_gateway (in_addr_t *ret, in_addr_t *netmask)  /* PLATFORM-SPECIFIC */
-{
-  return false;
-}
-
-#endif
-
-bool
-netmask_to_netbits (const in_addr_t network, const in_addr_t netmask, int *netbits)
-{
-  int i;
-  const int addrlen = sizeof (in_addr_t) * 8;
-
-  if ((network & netmask) == network)
-    {
-      for (i = 0; i <= addrlen; ++i)
-	{
-	  in_addr_t mask = netbits_to_netmask (i);
-	  if (mask == netmask)
-	    {
-	      if (i == addrlen)
-		*netbits = -1;
-	      else
-		*netbits = i;
-	      return true;
-	    }
-	}
-    }
-  return false;
-}
-
-/*
- * get_bypass_addresses() is used by the redirect-gateway bypass-x
- * functions to build a route bypass to selected DHCP/DNS servers,
- * so that outgoing packets to these servers don't end up in the tunnel.
- */
-
-#if defined(WIN32)
-
-static void
-add_host_route_if_nonlocal (struct route_bypass *rb, const in_addr_t addr)
-{
-  if (test_local_addr(addr) == TLA_NONLOCAL && addr != 0 && addr != ~0) {
-    int i;
-    for (i = 0; i < rb->n_bypass; ++i)
-      {
-        if (addr == rb->bypass[i]) /* avoid duplicates */
-          return;
-      }
-    if (rb->n_bypass < N_ROUTE_BYPASS)
-      {
-        rb->bypass[rb->n_bypass++] = addr;
-      }
-  }
-}
-
-static void
-add_host_route_array (struct route_bypass *rb, const IP_ADDR_STRING *iplist)
-{
-  while (iplist)
-    {
-      bool succeed = false;
-      const in_addr_t ip = getaddr (GETADDR_HOST_ORDER, iplist->IpAddress.String, 0, &succeed, NULL);
-      if (succeed)
-	{
-	  add_host_route_if_nonlocal (rb, ip);
-	}
-      iplist = iplist->Next;
-    }
-}
-
-static void
-get_bypass_addresses (struct route_bypass *rb, const unsigned int flags)
-{
-  struct gc_arena gc = gc_new ();
-  /*bool ret_bool = false;*/
-
-  /* get full routing table */
-  const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc);
-
-  /* get the route which represents the default gateway */
-  const MIB_IPFORWARDROW *row = get_default_gateway_row (routes);
-
-  if (row)
-    {
-      /* get the adapter which the default gateway is associated with */
-      const IP_ADAPTER_INFO *dgi = get_adapter_info (row->dwForwardIfIndex, &gc);
-
-      /* get extra adapter info, such as DNS addresses */
-      const IP_PER_ADAPTER_INFO *pai = get_per_adapter_info (row->dwForwardIfIndex, &gc);
-
-      /* Bypass DHCP server address */
-      if ((flags & RG_BYPASS_DHCP) && dgi && dgi->DhcpEnabled)
-	add_host_route_array (rb, &dgi->DhcpServer);
-
-      /* Bypass DNS server addresses */
-      if ((flags & RG_BYPASS_DNS) && pai)
-	add_host_route_array (rb, &pai->DnsServerList);
-    }
-
-  gc_free (&gc);
-}
-
-#else
-
-static void
-get_bypass_addresses (struct route_bypass *rb, const unsigned int flags)  /* PLATFORM-SPECIFIC */
-{
-}
-
-#endif
-
-#if AUTO_USERID || defined(ENABLE_PUSH_PEER_INFO)
-
-#if defined(TARGET_LINUX)
-
-bool
-get_default_gateway_mac_addr (unsigned char *macaddr)
-{
-  struct ifreq *ifr, *ifend;
-  in_addr_t ina, mask;
-  struct ifreq ifreq;
-  struct ifconf ifc;
-  struct ifreq ifs[20]; // Maximum number of interfaces to scan
-  int sd = -1;
-  in_addr_t gwip = 0;
-  bool ret = false;
-
-  if (!get_default_gateway (&gwip, NULL))
-    {
-      msg (M_WARN, "GDGMA: get_default_gateway failed");
-      goto err;
-    }
-
-  if ((sd = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
-    {
-      msg (M_WARN, "GDGMA: socket() failed");
-      goto err;
-    }
-
-  ifc.ifc_len = sizeof (ifs);
-  ifc.ifc_req = ifs;
-  if (ioctl (sd, SIOCGIFCONF, &ifc) < 0)
-    {
-      msg (M_WARN, "GDGMA: ioctl(SIOCGIFCONF) failed");
-      goto err;
-    }
-
-  /* scan through interface list */
-  ifend = ifs + (ifc.ifc_len / sizeof (struct ifreq));
-  for (ifr = ifc.ifc_req; ifr < ifend; ifr++)
-    {
-      if (ifr->ifr_addr.sa_family == AF_INET)
-	{
-	  ina = ntohl(((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr);
-	  strncpynt (ifreq.ifr_name, ifr->ifr_name, sizeof (ifreq.ifr_name));
-
-	  dmsg (D_AUTO_USERID, "GDGMA: %s", ifreq.ifr_name);
-
-	  /* check that the interface is up, and not point-to-point or loopback */
-	  if (ioctl (sd, SIOCGIFFLAGS, &ifreq) < 0)
-	    {
-	      dmsg (D_AUTO_USERID, "GDGMA: SIOCGIFFLAGS(%s) failed", ifreq.ifr_name);
-	      continue;
-	    }
-
-	  if ((ifreq.ifr_flags & (IFF_UP|IFF_LOOPBACK)) != IFF_UP)
-	    {
-	      dmsg (D_AUTO_USERID, "GDGMA: interface %s is down or loopback", ifreq.ifr_name);
-	      continue;
-	    }
-
-	  /* get interface netmask and check for correct subnet */
-	  if (ioctl (sd, SIOCGIFNETMASK, &ifreq) < 0)
-	    {
-	      dmsg (D_AUTO_USERID, "GDGMA: SIOCGIFNETMASK(%s) failed", ifreq.ifr_name);
-	      continue;
-	    }
-
-	  mask = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr);
-	  if (((gwip ^ ina) & mask) != 0)
-	    {
-	      dmsg (D_AUTO_USERID, "GDGMA: gwip=0x%08x ina=0x%08x mask=0x%08x",
-		    (unsigned int)gwip,
-		    (unsigned int)ina,
-		    (unsigned int)mask);
-	      continue;
-	    }
-	  break;
-	}
-    }
-  if (ifr >= ifend)
-    {
-      msg (M_WARN, "GDGMA: couldn't find gw interface");
-      goto err;
-    }
-
-  /* now get the hardware address. */
-  memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
-  if (ioctl (sd, SIOCGIFHWADDR, &ifreq) < 0)
-    {
-      msg (M_WARN, "GDGMA: SIOCGIFHWADDR(%s) failed", ifreq.ifr_name);
-      goto err;
-    }
-
-  memcpy (macaddr, &ifreq.ifr_hwaddr.sa_data, 6);
-  ret = true;
-
- err:
-  if (sd >= 0)
-    close (sd);
-  return ret;
-}
-
-#elif defined(WIN32)
-
-bool
-get_default_gateway_mac_addr (unsigned char *macaddr)
-{
-  struct gc_arena gc = gc_new ();
-  const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
-  in_addr_t gwip = 0;
-  DWORD a_index;
-  const IP_ADAPTER_INFO *ai;
-
-  if (!get_default_gateway (&gwip, NULL))
-    {
-      msg (M_WARN, "GDGMA: get_default_gateway failed");
-      goto err;
-    }
-
-  a_index = adapter_index_of_ip (adapters, gwip, NULL, NULL);
-  ai = get_adapter (adapters, a_index);
-
-  if (!ai)
-    {
-      msg (M_WARN, "GDGMA: couldn't find gw interface");
-      goto err;
-    }
-
-  memcpy (macaddr, ai->Address, 6);
-
-  gc_free (&gc);
-  return true;
-
- err:
-  gc_free (&gc);
-  return false;
-}
-
-#else
-
-bool
-get_default_gateway_mac_addr (unsigned char *macaddr) /* PLATFORM-SPECIFIC */
-{
-  return false;
-}
-
-#endif
-#endif /* AUTO_USERID */
-
-/*
- * Test if addr is reachable via a local interface (return ILA_LOCAL),
- * or if it needs to be routed via the default gateway (return
- * ILA_NONLOCAL).  If the target platform doesn't implement this
- * function, return ILA_NOT_IMPLEMENTED.
- *
- * Used by redirect-gateway autolocal feature
- */
-
-#if defined(WIN32)
-
-int
-test_local_addr (const in_addr_t addr)
-{
-  struct gc_arena gc = gc_new ();
-  const in_addr_t nonlocal_netmask = 0x80000000L; /* routes with netmask <= to this are considered non-local */
-  bool ret = TLA_NONLOCAL;
-
-  /* get full routing table */
-  const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc);
-  if (rt)
-    {
-      int i;
-      for (i = 0; i < rt->dwNumEntries; ++i)
-	{
-	  const MIB_IPFORWARDROW *row = &rt->table[i];
-	  const in_addr_t net = ntohl (row->dwForwardDest);
-	  const in_addr_t mask = ntohl (row->dwForwardMask);
-	  if (mask > nonlocal_netmask && (addr & mask) == net)
-	    {
-	      ret = TLA_LOCAL;
-	      break;
-	    }
-	}
-    }
-
-  gc_free (&gc);
-  return ret;
-}
-
-#else
-
-
-int
-test_local_addr (const in_addr_t addr) /* PLATFORM-SPECIFIC */
-{
-  return TLA_NOT_IMPLEMENTED;
-}
-
-#endif