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-rw-r--r--src/openvpn/route.c1814
1 files changed, 0 insertions, 1814 deletions
diff --git a/src/openvpn/route.c b/src/openvpn/route.c
deleted file mode 100644
index cbcbf12..0000000
--- a/src/openvpn/route.c
+++ /dev/null
@@ -1,1814 +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) 2002-2005 OpenVPN Solutions LLC <info@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.
- */
-
-#ifdef WIN32
-#include "config-win32.h"
-#else
-#include "config.h"
-#endif
-
-#include "syshead.h"
-
-#include "common.h"
-#include "error.h"
-#include "route.h"
-#include "misc.h"
-#include "socket.h"
-#include "manage.h"
-
-#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);
-
-struct route_option_list *
-new_route_option_list (struct gc_arena *a)
-{
- struct route_option_list *ret;
- ALLOC_OBJ_CLEAR_GC (ret, struct route_option_list, a);
- return ret;
-}
-
-struct route_list *
-new_route_list (struct gc_arena *a)
-{
- struct route_list *ret;
- ALLOC_OBJ_CLEAR_GC (ret, struct route_list, a);
- 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)
-{
- *status = true;
- if (!strcmp (string, "vpn_gateway"))
- {
- if (spec->remote_endpoint_defined)
- *out = spec->remote_endpoint;
- else
- {
- msg (M_INFO, PACKAGE_NAME " ROUTE: vpn_gateway undefined");
- *status = false;
- }
- return true;
- }
- else if (!strcmp (string, "net_gateway"))
- {
- 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");
- *status = false;
- }
- return true;
- }
- else if (!strcmp (string, "remote_host"))
- {
- if (spec->remote_host_defined)
- *out = spec->remote_host;
- else
- {
- msg (M_INFO, PACKAGE_NAME " ROUTE: remote_host undefined");
- *status = false;
- }
- return true;
- }
- return false;
-}
-
-static bool
-init_route (struct route *r,
- 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 (
- GETADDR_RESOLVE
- | GETADDR_HOST_ORDER
- | GETADDR_WARN_ON_SIGNAL,
- ro->network,
- 0,
- &status,
- NULL);
- }
-
- 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
- {
- r->metric = 0;
- r->metric_defined = false;
- }
-
- 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 >= MAX_ROUTES)
- msg (M_FATAL, PACKAGE_NAME " ROUTE: cannot add more than %d routes",
- MAX_ROUTES);
- 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)
-{
- CLEAR (*rl);
-}
-
-bool
-init_route_list (struct route_list *rl,
- const struct route_option_list *opt,
- const char *remote_endpoint,
- in_addr_t remote_host,
- struct env_set *es)
-{
- struct gc_arena gc = gc_new ();
- bool ret = true;
-
- clear_route_list (rl);
-
- if (remote_host)
- {
- rl->spec.remote_host = remote_host;
- rl->spec.remote_host_defined = true;
- }
-
- rl->spec.net_gateway_defined = get_default_gateway (&rl->spec.net_gateway);
- if (rl->spec.net_gateway_defined)
- {
- setenv_route_addr (es, "net_gateway", rl->spec.net_gateway, -1);
- dmsg (D_ROUTE_DEBUG, "ROUTE: default_gateway=%s", print_in_addr_t (rl->spec.net_gateway, 0, &gc));
- }
- else
- {
- dmsg (D_ROUTE_DEBUG, "ROUTE: default_gateway=UNDEF");
- }
- rl->redirect_default_gateway = opt->redirect_default_gateway;
- rl->redirect_local = opt->redirect_local;
- rl->redirect_def1 = opt->redirect_def1;
-
- 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;
-
- ASSERT (opt->n >= 0 && opt->n < MAX_ROUTES);
-
- /* parse the routes from opt to rl */
- {
- int i, j = 0;
- for (i = 0; i < opt->n; ++i)
- {
- if (!init_route (&rl->routes[j],
- &opt->routes[i],
- &rl->spec))
- ret = false;
- else
- ++j;
- }
- 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
-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->redirect_default_gateway)
- {
- 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
- {
- /* route remote host to original default gateway */
- if (!rl->redirect_local)
- add_route3 (rl->spec.remote_host,
- ~0,
- rl->spec.net_gateway,
- tt,
- flags,
- es);
-
- if (rl->redirect_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->redirect_local)
- del_route3 (rl->spec.remote_host,
- ~0,
- rl->spec.net_gateway,
- tt,
- flags,
- es);
-
- if (rl->redirect_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);
- }
-#endif
-
- for (i = 0; i < rl->n; ++i)
- {
- if (flags & ROUTE_DELETE_FIRST)
- delete_route (&rl->routes[i], tt, flags, es);
- add_route (&rl->routes[i], 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 (*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->redirect_default_gateway)
- msg (level, " [redirect_default_gateway local=%d]",
- rol->redirect_local);
- 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);
-}
-
-static void
-add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
-{
- struct gc_arena gc;
- struct buffer buf;
- const char *network;
- const char *netmask;
- const char *gateway;
- bool status = false;
-
- if (!r->defined)
- return;
-
- gc_init (&gc);
- buf = alloc_buf_gc (256, &gc);
-
- 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
- buf_printf (&buf, IPROUTE_PATH " route add %s/%d via %s",
- network,
- count_netmask_bits(netmask),
- gateway);
- if (r->metric_defined)
- buf_printf (&buf, " metric %d", r->metric);
-
-#else
- buf_printf (&buf, ROUTE_PATH " add -net %s netmask %s gw %s",
- network,
- netmask,
- gateway);
- if (r->metric_defined)
- buf_printf (&buf, " metric %d", r->metric);
-#endif /*CONFIG_FEATURE_IPROUTE*/
- msg (D_ROUTE, "%s", BSTR (&buf));
- status = system_check (BSTR (&buf), es, 0, "ERROR: Linux route add command failed");
-
-#elif defined (WIN32)
-
- buf_printf (&buf, ROUTE_PATH " ADD %s MASK %s %s",
- network,
- netmask,
- gateway);
- if (r->metric_defined)
- buf_printf (&buf, " METRIC %d", r->metric);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
-
- 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 = system_check (BSTR (&buf), es, 0, "ERROR: Windows route add command failed");
- netcmd_semaphore_release ();
- }
- else
- {
- ASSERT (0);
- }
-
-#elif defined (TARGET_SOLARIS)
-
- /* example: route add 192.0.2.32 -netmask 255.255.255.224 somegateway */
-
- buf_printf (&buf, ROUTE_PATH " add");
-
-#if 0
- if (r->metric_defined)
- buf_printf (&buf, " -rtt %d", r->metric);
-#endif
-
- buf_printf (&buf, " %s -netmask %s %s",
- network,
- netmask,
- gateway);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- status = system_check (BSTR (&buf), es, 0, "ERROR: Solaris route add command failed");
-
-#elif defined(TARGET_FREEBSD)
-
- buf_printf (&buf, ROUTE_PATH " add");
-
-#if 0
- if (r->metric_defined)
- buf_printf (&buf, " -rtt %d", r->metric);
-#endif
-
- buf_printf (&buf, " -net %s %s %s",
- network,
- gateway,
- netmask);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- status = system_check (BSTR (&buf), es, 0, "ERROR: FreeBSD route add command failed");
-
-#elif defined(TARGET_DARWIN)
-
- buf_printf (&buf, ROUTE_PATH " add");
-
-#if 0
- if (r->metric_defined)
- buf_printf (&buf, " -rtt %d", r->metric);
-#endif
-
- buf_printf (&buf, " -net %s %s %s",
- network,
- gateway,
- netmask);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- status = system_check (BSTR (&buf), es, 0, "ERROR: OS X route add command failed");
-
-#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
-
- buf_printf (&buf, ROUTE_PATH " add");
-
-#if 0
- if (r->metric_defined)
- buf_printf (&buf, " -rtt %d", r->metric);
-#endif
-
- buf_printf (&buf, " -net %s %s -netmask %s",
- network,
- gateway,
- netmask);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- status = system_check (BSTR (&buf), 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;
- 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 buffer buf;
- const char *network;
- const char *netmask;
- const char *gateway;
-
- if (!r->defined)
- return;
-
- gc_init (&gc);
-
- buf = alloc_buf_gc (256, &gc);
- 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
- buf_printf (&buf, IPROUTE_PATH " route del %s/%d",
- network,
- count_netmask_bits(netmask));
-#else
-
- buf_printf (&buf, ROUTE_PATH " del -net %s netmask %s",
- network,
- netmask);
-#endif /*CONFIG_FEATURE_IPROUTE*/
- if (r->metric_defined)
- buf_printf (&buf, " metric %d", r->metric);
- msg (D_ROUTE, "%s", BSTR (&buf));
- system_check (BSTR (&buf), es, 0, "ERROR: Linux route delete command failed");
-
-#elif defined (WIN32)
-
- buf_printf (&buf, ROUTE_PATH " DELETE %s MASK %s %s",
- network,
- netmask,
- gateway);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
-
- 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 ();
- system_check (BSTR (&buf), es, 0, "ERROR: Windows route delete command failed");
- netcmd_semaphore_release ();
- }
- else
- {
- ASSERT (0);
- }
-
-#elif defined (TARGET_SOLARIS)
-
- buf_printf (&buf, ROUTE_PATH " delete %s -netmask %s %s",
- network,
- netmask,
- gateway);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- system_check (BSTR (&buf), es, 0, "ERROR: Solaris route delete command failed");
-
-#elif defined(TARGET_FREEBSD)
-
- buf_printf (&buf, ROUTE_PATH " delete -net %s %s %s",
- network,
- gateway,
- netmask);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- system_check (BSTR (&buf), es, 0, "ERROR: FreeBSD route delete command failed");
-
-#elif defined(TARGET_DARWIN)
-
- buf_printf (&buf, ROUTE_PATH " delete -net %s %s %s",
- network,
- gateway,
- netmask);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- system_check (BSTR (&buf), es, 0, "ERROR: OS X route delete command failed");
-
-#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
-
- buf_printf (&buf, ROUTE_PATH " delete -net %s %s -netmask %s",
- network,
- gateway,
- netmask);
-
- msg (D_ROUTE, "%s", BSTR (&buf));
- system_check (BSTR (&buf), 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
-
- 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);
- 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->redirect_default_gateway && 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 bool
-get_default_gateway (in_addr_t *gateway)
-{
- struct gc_arena gc = gc_new ();
- int i;
- const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc);
- DWORD lowest_metric = ~0;
- in_addr_t ret = 0;
- int best = -1;
-
- if (!routes)
- goto done;
-
- 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 in_addr_t gw = ntohl (row->dwForwardNextHop);
- const DWORD metric = row->dwForwardMetric1;
-
- msg (D_ROUTE_DEBUG, "GDG: route[%d] %s %s %s m=%u",
- i,
- 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),
- (unsigned int)metric);
-
- if (!net && !mask && metric < lowest_metric)
- {
- ret = gw;
- lowest_metric = metric;
- best = i;
- }
- }
-
- done:
- gc_free (&gc);
-
- if (ret)
- {
- dmsg (D_ROUTE_DEBUG, "GDGR: best=%d lm=%u", best, (unsigned int)lowest_metric);
- *gateway = ret;
- return true;
- }
- else
- return false;
-}
-
-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 a different forward type (--redirect-gateway over RRAS seems to need this) */
- fr.dwForwardType = 3; /* the next hop is the final dest */
-
- status = CreateIpForwardEntry (&fr);
-
- if (status == NO_ERROR)
- ret = true;
- else
- msg (M_WARN, "ROUTE: route addition failed using CreateIpForwardEntry: %s [if_index=%u]",
- strerror_win32 (status, &gc),
- (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)
-
-static bool
-get_default_gateway (in_addr_t *gateway)
-{
- 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;
- 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)
-
-#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))
-
-static bool
-get_default_gateway (in_addr_t *ret)
-{
- 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 1
- msg (M_INFO, "gw %s",
- print_in_addr_t ((in_addr_t) *ret, 0, &gc));
-#endif
-
- 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))
-
-static bool
-get_default_gateway (in_addr_t *ret)
-{
- 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 1
- msg (M_INFO, "gw %s",
- print_in_addr_t ((in_addr_t) *ret, 0, &gc));
-#endif
-
- 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))
-
-static bool
-get_default_gateway (in_addr_t *ret)
-{
- 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 1
- msg (M_INFO, "gw %s",
- print_in_addr_t ((in_addr_t) *ret, 0, &gc));
-#endif
-
- gc_free (&gc);
- return true;
- }
- else
- {
- gc_free (&gc);
- return false;
- }
-}
-
-#else
-
-static bool
-get_default_gateway (in_addr_t *ret)
-{
- 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;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-16 03:55:12 +0000