2
* OpenVPN -- An application to securely tunnel IP networks
3
* over a single TCP/UDP port, with support for SSL/TLS-based
4
* session authentication and key exchange,
5
* packet encryption, packet authentication, and
8
* Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>
10
* This program is free software; you can redistribute it and/or modify
11
* it under the terms of the GNU General Public License version 2
12
* as published by the Free Software Foundation.
14
* This program is distributed in the hope that it will be useful,
15
* but WITHOUT ANY WARRANTY; without even the implied warranty of
16
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17
* GNU General Public License for more details.
19
* You should have received a copy of the GNU General Public License
20
* along with this program (see the file COPYING included with this
21
* distribution); if not, write to the Free Software Foundation, Inc.,
22
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26
* Support routines for adding/deleting network routes.
41
static void delete_route (const struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es);
42
static void get_bypass_addresses (struct route_bypass *rb, const unsigned int flags);
47
print_bypass_addresses (const struct route_bypass *rb)
49
struct gc_arena gc = gc_new ();
51
for (i = 0; i < rb->n_bypass; ++i)
53
msg (D_ROUTE, "ROUTE: bypass_host_route[%d]=%s",
55
print_in_addr_t (rb->bypass[i], 0, &gc));
63
add_bypass_address (struct route_bypass *rb, const in_addr_t a)
66
for (i = 0; i < rb->n_bypass; ++i)
68
if (a == rb->bypass[i]) /* avoid duplicates */
71
if (rb->n_bypass < N_ROUTE_BYPASS)
73
rb->bypass[rb->n_bypass++] = a;
82
struct route_option_list *
83
new_route_option_list (const int max_routes, struct gc_arena *a)
85
struct route_option_list *ret;
86
ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_option_list, struct route_option, max_routes, a);
87
ret->capacity = max_routes;
91
struct route_option_list *
92
clone_route_option_list (const struct route_option_list *src, struct gc_arena *a)
94
const size_t rl_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list));
95
struct route_option_list *ret = gc_malloc (rl_size, false, a);
96
memcpy (ret, src, rl_size);
101
copy_route_option_list (struct route_option_list *dest, const struct route_option_list *src)
103
const size_t src_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list));
104
if (src->n > dest->capacity)
105
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);
106
memcpy (dest, src, src_size);
110
new_route_list (const int max_routes, struct gc_arena *a)
112
struct route_list *ret;
113
ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_list, struct route, max_routes, a);
114
ret->capacity = max_routes;
119
route_string (const struct route *r, struct gc_arena *gc)
121
struct buffer out = alloc_buf_gc (256, gc);
122
buf_printf (&out, "ROUTE network %s netmask %s gateway %s",
123
print_in_addr_t (r->network, 0, gc),
124
print_in_addr_t (r->netmask, 0, gc),
125
print_in_addr_t (r->gateway, 0, gc)
127
if (r->metric_defined)
128
buf_printf (&out, " metric %d", r->metric);
133
is_route_parm_defined (const char *parm)
137
if (!strcmp (parm, "default"))
143
setenv_route_addr (struct env_set *es, const char *key, const in_addr_t addr, int i)
145
struct gc_arena gc = gc_new ();
146
struct buffer name = alloc_buf_gc (256, &gc);
148
buf_printf (&name, "route_%s_%d", key, i);
150
buf_printf (&name, "route_%s", key);
151
setenv_str (es, BSTR (&name), print_in_addr_t (addr, 0, &gc));
156
get_special_addr (const struct route_special_addr *spec,
163
if (!strcmp (string, "vpn_gateway"))
167
if (spec->remote_endpoint_defined)
168
*out = spec->remote_endpoint;
171
msg (M_INFO, PACKAGE_NAME " ROUTE: vpn_gateway undefined");
178
else if (!strcmp (string, "net_gateway"))
182
if (spec->net_gateway_defined)
183
*out = spec->net_gateway;
186
msg (M_INFO, PACKAGE_NAME " ROUTE: net_gateway undefined -- unable to get default gateway from system");
193
else if (!strcmp (string, "remote_host"))
197
if (spec->remote_host_defined)
198
*out = spec->remote_host;
201
msg (M_INFO, PACKAGE_NAME " ROUTE: remote_host undefined");
212
is_special_addr (const char *addr_str)
215
return get_special_addr (NULL, addr_str, NULL, NULL);
221
init_route (struct route *r,
222
const struct route_option *ro,
223
const struct route_special_addr *spec)
225
const in_addr_t default_netmask = ~0;
233
if (!is_route_parm_defined (ro->network))
238
if (!get_special_addr (spec, ro->network, &r->network, &status))
240
r->network = getaddr (
243
| GETADDR_WARN_ON_SIGNAL,
255
if (is_route_parm_defined (ro->netmask))
257
r->netmask = getaddr (
259
| GETADDR_WARN_ON_SIGNAL,
268
r->netmask = default_netmask;
272
if (is_route_parm_defined (ro->gateway))
274
if (!get_special_addr (spec, ro->gateway, &r->gateway, &status))
276
r->gateway = getaddr (
279
| GETADDR_WARN_ON_SIGNAL,
290
if (spec->remote_endpoint_defined)
291
r->gateway = spec->remote_endpoint;
294
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");
301
r->metric_defined = false;
303
if (is_route_parm_defined (ro->metric))
305
r->metric = atoi (ro->metric);
308
msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0",
313
r->metric_defined = true;
315
else if (spec->default_metric_defined)
317
r->metric = spec->default_metric;
318
r->metric_defined = true;
326
msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s",
333
add_route_to_option_list (struct route_option_list *l,
339
struct route_option *ro;
340
if (l->n >= l->capacity)
341
msg (M_FATAL, PACKAGE_NAME " ROUTE: cannot add more than %d routes -- please increase the max-routes option in the client configuration file",
343
ro = &l->routes[l->n];
344
ro->network = network;
345
ro->netmask = netmask;
346
ro->gateway = gateway;
352
clear_route_list (struct route_list *rl)
354
const int capacity = rl->capacity;
355
const size_t rl_size = array_mult_safe (sizeof(struct route), capacity, sizeof(struct route_list));
356
memset(rl, 0, rl_size);
357
rl->capacity = capacity;
361
route_list_add_default_gateway (struct route_list *rl,
363
const in_addr_t addr)
365
rl->spec.remote_endpoint = addr;
366
rl->spec.remote_endpoint_defined = true;
367
setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1);
371
init_route_list (struct route_list *rl,
372
const struct route_option_list *opt,
373
const char *remote_endpoint,
375
in_addr_t remote_host,
378
struct gc_arena gc = gc_new ();
381
clear_route_list (rl);
383
rl->flags = opt->flags;
387
rl->spec.remote_host = remote_host;
388
rl->spec.remote_host_defined = true;
393
rl->spec.default_metric = default_metric;
394
rl->spec.default_metric_defined = true;
397
rl->spec.net_gateway_defined = get_default_gateway (&rl->spec.net_gateway, NULL);
398
if (rl->spec.net_gateway_defined)
400
setenv_route_addr (es, "net_gateway", rl->spec.net_gateway, -1);
401
dmsg (D_ROUTE, "ROUTE default_gateway=%s", print_in_addr_t (rl->spec.net_gateway, 0, &gc));
405
dmsg (D_ROUTE, "ROUTE: default_gateway=UNDEF");
408
if (rl->flags & RG_ENABLE)
410
get_bypass_addresses (&rl->spec.bypass, rl->flags);
412
print_bypass_addresses (&rl->spec.bypass);
416
if (is_route_parm_defined (remote_endpoint))
418
rl->spec.remote_endpoint = getaddr (
421
| GETADDR_WARN_ON_SIGNAL,
424
&rl->spec.remote_endpoint_defined,
427
if (rl->spec.remote_endpoint_defined)
429
setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1);
433
msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s",
439
rl->spec.remote_endpoint_defined = false;
441
if (!(opt->n >= 0 && opt->n <= rl->capacity))
442
msg (M_FATAL, PACKAGE_NAME " ROUTE: (init) number of route options (%d) is greater than route list capacity (%d)", opt->n, rl->capacity);
444
/* parse the routes from opt to rl */
447
for (i = 0; i < opt->n; ++i)
449
if (!init_route (&rl->routes[j],
464
add_route3 (in_addr_t network,
467
const struct tuntap *tt,
469
const struct env_set *es)
477
add_route (&r, tt, flags, es);
481
del_route3 (in_addr_t network,
484
const struct tuntap *tt,
486
const struct env_set *es)
494
delete_route (&r, tt, flags, es);
498
add_bypass_routes (struct route_bypass *rb,
500
const struct tuntap *tt,
502
const struct env_set *es)
505
for (i = 0; i < rb->n_bypass; ++i)
507
if (rb->bypass[i] != gateway)
508
add_route3 (rb->bypass[i],
518
del_bypass_routes (struct route_bypass *rb,
520
const struct tuntap *tt,
522
const struct env_set *es)
525
for (i = 0; i < rb->n_bypass; ++i)
527
if (rb->bypass[i] != gateway)
528
del_route3 (rb->bypass[i],
538
redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
540
const char err[] = "NOTE: unable to redirect default gateway --";
542
if (rl->flags & RG_ENABLE)
544
if (!rl->spec.remote_endpoint_defined)
546
msg (M_WARN, "%s VPN gateway parameter (--route-gateway or --ifconfig) is missing", err);
548
else if (!rl->spec.net_gateway_defined)
550
msg (M_WARN, "%s Cannot read current default gateway from system", err);
552
else if (!rl->spec.remote_host_defined)
554
msg (M_WARN, "%s Cannot obtain current remote host address", err);
558
bool local = BOOL_CAST(rl->flags & RG_LOCAL);
559
if (rl->flags & RG_AUTO_LOCAL) {
560
const int tla = test_local_addr (rl->spec.remote_host);
561
if (tla == TLA_NONLOCAL)
563
dmsg (D_ROUTE, "ROUTE remote_host is NOT LOCAL");
566
else if (tla == TLA_LOCAL)
568
dmsg (D_ROUTE, "ROUTE remote_host is LOCAL");
574
/* route remote host to original default gateway */
575
add_route3 (rl->spec.remote_host,
577
rl->spec.net_gateway,
581
rl->did_local = true;
584
/* route DHCP/DNS server traffic through original default gateway */
585
add_bypass_routes (&rl->spec.bypass, rl->spec.net_gateway, tt, flags, es);
587
if (rl->flags & RG_REROUTE_GW)
589
if (rl->flags & RG_DEF1)
591
/* add new default route (1st component) */
592
add_route3 (0x00000000,
594
rl->spec.remote_endpoint,
599
/* add new default route (2nd component) */
600
add_route3 (0x80000000,
602
rl->spec.remote_endpoint,
609
/* delete default route */
612
rl->spec.net_gateway,
617
/* add new default route */
620
rl->spec.remote_endpoint,
627
/* set a flag so we can undo later */
628
rl->did_redirect_default_gateway = true;
634
undo_redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
636
if (rl->did_redirect_default_gateway)
638
/* delete remote host route */
641
del_route3 (rl->spec.remote_host,
643
rl->spec.net_gateway,
647
rl->did_local = false;
650
/* delete special DHCP/DNS bypass route */
651
del_bypass_routes (&rl->spec.bypass, rl->spec.net_gateway, tt, flags, es);
653
if (rl->flags & RG_REROUTE_GW)
655
if (rl->flags & RG_DEF1)
657
/* delete default route (1st component) */
658
del_route3 (0x00000000,
660
rl->spec.remote_endpoint,
665
/* delete default route (2nd component) */
666
del_route3 (0x80000000,
668
rl->spec.remote_endpoint,
675
/* delete default route */
678
rl->spec.remote_endpoint,
683
/* restore original default route */
686
rl->spec.net_gateway,
693
rl->did_redirect_default_gateway = false;
698
add_routes (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
700
redirect_default_route_to_vpn (rl, tt, flags, es);
701
if (!rl->routes_added)
705
#ifdef ENABLE_MANAGEMENT
706
if (management && rl->n)
708
management_set_state (management,
709
OPENVPN_STATE_ADD_ROUTES,
716
for (i = 0; i < rl->n; ++i)
718
struct route *r = &rl->routes[i];
719
check_subnet_conflict (r->network, r->netmask, "route");
720
if (flags & ROUTE_DELETE_FIRST)
721
delete_route (r, tt, flags, es);
722
add_route (r, tt, flags, es);
724
rl->routes_added = true;
729
delete_routes (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
731
if (rl->routes_added)
734
for (i = rl->n - 1; i >= 0; --i)
736
const struct route *r = &rl->routes[i];
737
delete_route (r, tt, flags, es);
739
rl->routes_added = false;
741
undo_redirect_default_route_to_vpn (rl, tt, flags, es);
743
clear_route_list (rl);
749
show_opt (const char *option)
758
print_route_option (const struct route_option *ro, int level)
760
msg (level, " route %s/%s/%s/%s",
761
show_opt (ro->network),
762
show_opt (ro->netmask),
763
show_opt (ro->gateway),
764
show_opt (ro->metric));
768
print_route_options (const struct route_option_list *rol,
772
if (rol->flags & RG_ENABLE)
773
msg (level, " [redirect_default_gateway local=%d]",
774
(rol->flags & RG_LOCAL) != 0);
775
for (i = 0; i < rol->n; ++i)
776
print_route_option (&rol->routes[i], level);
782
print_route (const struct route *r, int level)
784
struct gc_arena gc = gc_new ();
786
msg (level, "%s", route_string (r, &gc));
791
print_routes (const struct route_list *rl, int level)
794
for (i = 0; i < rl->n; ++i)
795
print_route (&rl->routes[i], level);
799
setenv_route (struct env_set *es, const struct route *r, int i)
801
struct gc_arena gc = gc_new ();
804
setenv_route_addr (es, "network", r->network, i);
805
setenv_route_addr (es, "netmask", r->netmask, i);
806
setenv_route_addr (es, "gateway", r->gateway, i);
808
if (r->metric_defined)
810
struct buffer name = alloc_buf_gc (256, &gc);
811
buf_printf (&name, "route_metric_%d", i);
812
setenv_int (es, BSTR (&name), r->metric);
819
setenv_routes (struct env_set *es, const struct route_list *rl)
822
for (i = 0; i < rl->n; ++i)
823
setenv_route (es, &rl->routes[i], i + 1);
827
add_route (struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
842
network = print_in_addr_t (r->network, 0, &gc);
843
netmask = print_in_addr_t (r->netmask, 0, &gc);
844
gateway = print_in_addr_t (r->gateway, 0, &gc);
847
* Filter out routes which are essentially no-ops
849
if (r->network == r->gateway && r->netmask == 0xFFFFFFFF)
851
msg (M_INFO, PACKAGE_NAME " ROUTE: omitted no-op route: %s/%s -> %s",
852
network, netmask, gateway);
856
#if defined(TARGET_LINUX)
857
#ifdef CONFIG_FEATURE_IPROUTE
858
argv_printf (&argv, "%s route add %s/%d via %s",
861
count_netmask_bits(netmask),
863
if (r->metric_defined)
864
argv_printf_cat (&argv, "metric %d", r->metric);
867
argv_printf (&argv, "%s add -net %s netmask %s gw %s",
872
if (r->metric_defined)
873
argv_printf_cat (&argv, "metric %d", r->metric);
874
#endif /*CONFIG_FEATURE_IPROUTE*/
875
argv_msg (D_ROUTE, &argv);
876
status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route add command failed");
878
#elif defined (WIN32)
880
argv_printf (&argv, "%s%sc ADD %s MASK %s %s",
882
WIN_ROUTE_PATH_SUFFIX,
886
if (r->metric_defined)
887
argv_printf_cat (&argv, "METRIC %d", r->metric);
889
argv_msg (D_ROUTE, &argv);
891
if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI)
893
status = add_route_ipapi (r, tt);
894
msg (D_ROUTE, "Route addition via IPAPI %s", status ? "succeeded" : "failed");
896
else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE)
898
netcmd_semaphore_lock ();
899
status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed");
900
netcmd_semaphore_release ();
902
else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE)
904
status = add_route_ipapi (r, tt);
905
msg (D_ROUTE, "Route addition via IPAPI %s [adaptive]", status ? "succeeded" : "failed");
908
msg (D_ROUTE, "Route addition fallback to route.exe");
909
netcmd_semaphore_lock ();
910
status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed [adaptive]");
911
netcmd_semaphore_release ();
919
#elif defined (TARGET_SOLARIS)
921
/* example: route add 192.0.2.32 -netmask 255.255.255.224 somegateway */
923
argv_printf (&argv, "%s add",
927
if (r->metric_defined)
928
argv_printf_cat (&argv, "-rtt %d", r->metric);
931
argv_printf_cat (&argv, "%s -netmask %s %s",
936
argv_msg (D_ROUTE, &argv);
937
status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add command failed");
939
#elif defined(TARGET_FREEBSD)
941
argv_printf (&argv, "%s add",
945
if (r->metric_defined)
946
argv_printf_cat (&argv, "-rtt %d", r->metric);
949
argv_printf_cat (&argv, "-net %s %s %s",
954
argv_msg (D_ROUTE, &argv);
955
status = openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route add command failed");
957
#elif defined(TARGET_DRAGONFLY)
959
argv_printf (&argv, "%s add",
963
if (r->metric_defined)
964
argv_printf_cat (&argv, "-rtt %d", r->metric);
967
argv_printf_cat (&argv, "-net %s %s %s",
972
argv_msg (D_ROUTE, &argv);
973
status = openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route add command failed");
975
#elif defined(TARGET_DARWIN)
977
argv_printf (&argv, "%s add",
981
if (r->metric_defined)
982
argv_printf_cat (&argv, "-rtt %d", r->metric);
985
argv_printf_cat (&argv, "-net %s %s %s",
990
argv_msg (D_ROUTE, &argv);
991
status = openvpn_execve_check (&argv, es, 0, "ERROR: OS X route add command failed");
993
#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
995
argv_printf (&argv, "%s add",
999
if (r->metric_defined)
1000
argv_printf_cat (&argv, "-rtt %d", r->metric);
1003
argv_printf_cat (&argv, "-net %s %s -netmask %s",
1008
argv_msg (D_ROUTE, &argv);
1009
status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route add command failed");
1012
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");
1016
r->defined = status;
1022
delete_route (const struct route *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es)
1026
const char *network;
1027
const char *netmask;
1028
const char *gateway;
1036
network = print_in_addr_t (r->network, 0, &gc);
1037
netmask = print_in_addr_t (r->netmask, 0, &gc);
1038
gateway = print_in_addr_t (r->gateway, 0, &gc);
1040
#if defined(TARGET_LINUX)
1041
#ifdef CONFIG_FEATURE_IPROUTE
1042
argv_printf (&argv, "%s route del %s/%d",
1045
count_netmask_bits(netmask));
1048
argv_printf (&argv, "%s del -net %s netmask %s",
1052
#endif /*CONFIG_FEATURE_IPROUTE*/
1053
if (r->metric_defined)
1054
argv_printf_cat (&argv, "metric %d", r->metric);
1055
argv_msg (D_ROUTE, &argv);
1056
openvpn_execve_check (&argv, es, 0, "ERROR: Linux route delete command failed");
1058
#elif defined (WIN32)
1060
argv_printf (&argv, "%s%sc DELETE %s MASK %s %s",
1062
WIN_ROUTE_PATH_SUFFIX,
1067
argv_msg (D_ROUTE, &argv);
1069
if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI)
1071
const bool status = del_route_ipapi (r, tt);
1072
msg (D_ROUTE, "Route deletion via IPAPI %s", status ? "succeeded" : "failed");
1074
else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE)
1076
netcmd_semaphore_lock ();
1077
openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed");
1078
netcmd_semaphore_release ();
1080
else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE)
1082
const bool status = del_route_ipapi (r, tt);
1083
msg (D_ROUTE, "Route deletion via IPAPI %s [adaptive]", status ? "succeeded" : "failed");
1086
msg (D_ROUTE, "Route deletion fallback to route.exe");
1087
netcmd_semaphore_lock ();
1088
openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed [adaptive]");
1089
netcmd_semaphore_release ();
1097
#elif defined (TARGET_SOLARIS)
1099
argv_printf (&argv, "%s delete %s -netmask %s %s",
1105
argv_msg (D_ROUTE, &argv);
1106
openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete command failed");
1108
#elif defined(TARGET_FREEBSD)
1110
argv_printf (&argv, "%s delete -net %s %s %s",
1116
argv_msg (D_ROUTE, &argv);
1117
openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route delete command failed");
1119
#elif defined(TARGET_DRAGONFLY)
1121
argv_printf (&argv, "%s delete -net %s %s %s",
1127
argv_msg (D_ROUTE, &argv);
1128
openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route delete command failed");
1130
#elif defined(TARGET_DARWIN)
1132
argv_printf (&argv, "%s delete -net %s %s %s",
1138
argv_msg (D_ROUTE, &argv);
1139
openvpn_execve_check (&argv, es, 0, "ERROR: OS X route delete command failed");
1141
#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
1143
argv_printf (&argv, "%s delete -net %s %s -netmask %s",
1149
argv_msg (D_ROUTE, &argv);
1150
openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route delete command failed");
1153
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");
1161
* The --redirect-gateway option requires OS-specific code below
1162
* to get the current default gateway.
1167
static const MIB_IPFORWARDTABLE *
1168
get_windows_routing_table (struct gc_arena *gc)
1171
PMIB_IPFORWARDTABLE rt = NULL;
1174
status = GetIpForwardTable (NULL, &size, TRUE);
1175
if (status == ERROR_INSUFFICIENT_BUFFER)
1177
rt = (PMIB_IPFORWARDTABLE) gc_malloc (size, false, gc);
1178
status = GetIpForwardTable (rt, &size, TRUE);
1179
if (status != NO_ERROR)
1181
msg (D_ROUTE, "NOTE: GetIpForwardTable returned error: %s (code=%u)",
1182
strerror_win32 (status, gc),
1183
(unsigned int)status);
1191
test_route (const IP_ADAPTER_INFO *adapters,
1192
const in_addr_t gateway,
1196
DWORD i = adapter_index_of_ip (adapters, gateway, &count, NULL);
1203
test_route_helper (bool *ret,
1207
const IP_ADAPTER_INFO *adapters,
1208
const in_addr_t gateway)
1213
c = test_route (adapters, gateway, NULL);
1223
* If we tried to add routes now, would we succeed?
1226
test_routes (const struct route_list *rl, const struct tuntap *tt)
1228
struct gc_arena gc = gc_new ();
1229
const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
1234
bool adapter_up = false;
1236
if (is_adapter_up (tt, adapters))
1244
for (i = 0; i < rl->n; ++i)
1245
test_route_helper (&ret, &count, &good, &ambig, adapters, rl->routes[i].gateway);
1247
if ((rl->flags & RG_ENABLE) && rl->spec.remote_endpoint_defined)
1248
test_route_helper (&ret, &count, &good, &ambig, adapters, rl->spec.remote_endpoint);
1252
msg (D_ROUTE, "TEST ROUTES: %d/%d succeeded len=%d ret=%d a=%d u/d=%s",
1258
adapter_up ? "up" : "down");
1264
static const MIB_IPFORWARDROW *
1265
get_default_gateway_row (const MIB_IPFORWARDTABLE *routes)
1267
struct gc_arena gc = gc_new ();
1268
DWORD lowest_metric = ~0;
1269
const MIB_IPFORWARDROW *ret = NULL;
1275
for (i = 0; i < routes->dwNumEntries; ++i)
1277
const MIB_IPFORWARDROW *row = &routes->table[i];
1278
const in_addr_t net = ntohl (row->dwForwardDest);
1279
const in_addr_t mask = ntohl (row->dwForwardMask);
1280
const DWORD index = row->dwForwardIfIndex;
1281
const DWORD metric = row->dwForwardMetric1;
1283
dmsg (D_ROUTE_DEBUG, "GDGR: route[%d] %s/%s i=%d m=%d",
1285
print_in_addr_t ((in_addr_t) net, 0, &gc),
1286
print_in_addr_t ((in_addr_t) mask, 0, &gc),
1290
if (!net && !mask && metric < lowest_metric)
1293
lowest_metric = metric;
1299
dmsg (D_ROUTE_DEBUG, "GDGR: best=%d lm=%u", best, (unsigned int)lowest_metric);
1306
get_default_gateway (in_addr_t *gw, in_addr_t *netmask)
1308
struct gc_arena gc = gc_new ();
1309
bool ret_bool = false;
1311
const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
1312
const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc);
1313
const MIB_IPFORWARDROW *row = get_default_gateway_row (routes);
1317
*gw = ntohl (row->dwForwardNextHop);
1320
if (adapter_index_of_ip (adapters, *gw, NULL, netmask) == ~0)
1331
windows_route_find_if_index (const struct route *r, const struct tuntap *tt)
1333
struct gc_arena gc = gc_new ();
1336
const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
1337
const IP_ADAPTER_INFO *tun_adapter = get_tun_adapter (tt, adapters);
1338
bool on_tun = false;
1340
/* first test on tun interface */
1341
if (is_ip_in_adapter_subnet (tun_adapter, r->gateway, NULL))
1343
ret = tun_adapter->Index;
1347
else /* test on other interfaces */
1349
count = test_route (adapters, r->gateway, &ret);
1354
msg (M_WARN, "Warning: route gateway is not reachable on any active network adapters: %s",
1355
print_in_addr_t (r->gateway, 0, &gc));
1360
msg (M_WARN, "Warning: route gateway is ambiguous: %s (%d matches)",
1361
print_in_addr_t (r->gateway, 0, &gc),
1366
dmsg (D_ROUTE_DEBUG, "DEBUG: route find if: on_tun=%d count=%d index=%d",
1376
add_route_ipapi (const struct route *r, const struct tuntap *tt)
1378
struct gc_arena gc = gc_new ();
1381
const DWORD if_index = windows_route_find_if_index (r, tt);
1385
MIB_IPFORWARDROW fr;
1387
fr.dwForwardDest = htonl (r->network);
1388
fr.dwForwardMask = htonl (r->netmask);
1389
fr.dwForwardPolicy = 0;
1390
fr.dwForwardNextHop = htonl (r->gateway);
1391
fr.dwForwardIfIndex = if_index;
1392
fr.dwForwardType = 4; /* the next hop is not the final dest */
1393
fr.dwForwardProto = 3; /* PROTO_IP_NETMGMT */
1394
fr.dwForwardAge = 0;
1395
fr.dwForwardNextHopAS = 0;
1396
fr.dwForwardMetric1 = r->metric_defined ? r->metric : 1;
1397
fr.dwForwardMetric2 = ~0;
1398
fr.dwForwardMetric3 = ~0;
1399
fr.dwForwardMetric4 = ~0;
1400
fr.dwForwardMetric5 = ~0;
1402
if ((r->network & r->netmask) != r->network)
1403
msg (M_WARN, "Warning: address %s is not a network address in relation to netmask %s",
1404
print_in_addr_t (r->network, 0, &gc),
1405
print_in_addr_t (r->netmask, 0, &gc));
1407
status = CreateIpForwardEntry (&fr);
1409
if (status == NO_ERROR)
1413
/* failed, try increasing the metric to work around Vista issue */
1414
const unsigned int forward_metric_limit = 2048; /* iteratively retry higher metrics up to this limit */
1416
for ( ; fr.dwForwardMetric1 <= forward_metric_limit; ++fr.dwForwardMetric1)
1418
/* try a different forward type=3 ("the next hop is the final dest") in addition to 4.
1419
--redirect-gateway over RRAS seems to need this. */
1420
for (fr.dwForwardType = 4; fr.dwForwardType >= 3; --fr.dwForwardType)
1422
status = CreateIpForwardEntry (&fr);
1423
if (status == NO_ERROR)
1425
msg (D_ROUTE, "ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=%u and dwForwardType=%u",
1426
(unsigned int)fr.dwForwardMetric1,
1427
(unsigned int)fr.dwForwardType);
1431
else if (status != ERROR_BAD_ARGUMENTS)
1437
if (status != NO_ERROR)
1438
msg (M_WARN, "ROUTE: route addition failed using CreateIpForwardEntry: %s [status=%u if_index=%u]",
1439
strerror_win32 (status, &gc),
1440
(unsigned int)status,
1441
(unsigned int)if_index);
1450
del_route_ipapi (const struct route *r, const struct tuntap *tt)
1452
struct gc_arena gc = gc_new ();
1455
const DWORD if_index = windows_route_find_if_index (r, tt);
1459
MIB_IPFORWARDROW fr;
1462
fr.dwForwardDest = htonl (r->network);
1463
fr.dwForwardMask = htonl (r->netmask);
1464
fr.dwForwardPolicy = 0;
1465
fr.dwForwardNextHop = htonl (r->gateway);
1466
fr.dwForwardIfIndex = if_index;
1468
status = DeleteIpForwardEntry (&fr);
1470
if (status == NO_ERROR)
1473
msg (M_WARN, "ROUTE: route deletion failed using DeleteIpForwardEntry: %s",
1474
strerror_win32 (status, &gc));
1482
format_route_entry (const MIB_IPFORWARDROW *r, struct gc_arena *gc)
1484
struct buffer out = alloc_buf_gc (256, gc);
1485
buf_printf (&out, "%s %s %s p=%d i=%d t=%d pr=%d a=%d h=%d m=%d/%d/%d/%d/%d",
1486
print_in_addr_t (r->dwForwardDest, IA_NET_ORDER, gc),
1487
print_in_addr_t (r->dwForwardMask, IA_NET_ORDER, gc),
1488
print_in_addr_t (r->dwForwardNextHop, IA_NET_ORDER, gc),
1489
(int)r->dwForwardPolicy,
1490
(int)r->dwForwardIfIndex,
1491
(int)r->dwForwardType,
1492
(int)r->dwForwardProto,
1493
(int)r->dwForwardAge,
1494
(int)r->dwForwardNextHopAS,
1495
(int)r->dwForwardMetric1,
1496
(int)r->dwForwardMetric2,
1497
(int)r->dwForwardMetric3,
1498
(int)r->dwForwardMetric4,
1499
(int)r->dwForwardMetric5);
1504
* Show current routing table
1507
show_routes (int msglev)
1509
struct gc_arena gc = gc_new ();
1512
const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc);
1514
msg (msglev, "SYSTEM ROUTING TABLE");
1517
for (i = 0; i < rt->dwNumEntries; ++i)
1519
msg (msglev, "%s", format_route_entry (&rt->table[i], &gc));
1525
#elif defined(TARGET_LINUX)
1528
get_default_gateway (in_addr_t *gateway, in_addr_t *netmask)
1530
struct gc_arena gc = gc_new ();
1532
FILE *fp = fopen ("/proc/net/route", "r");
1538
unsigned int lowest_metric = ~0;
1539
in_addr_t best_gw = 0;
1540
while (fgets (line, sizeof (line), fp) != NULL)
1544
unsigned int net_x = 0;
1545
unsigned int mask_x = 0;
1546
unsigned int gw_x = 0;
1547
unsigned int metric = 0;
1548
const int np = sscanf (line, "%*s\t%x\t%x\t%*s\t%*s\t%*s\t%d\t%x",
1555
const in_addr_t net = ntohl (net_x);
1556
const in_addr_t mask = ntohl (mask_x);
1557
const in_addr_t gw = ntohl (gw_x);
1559
dmsg (D_ROUTE_DEBUG, "GDG: route[%d] %s/%s/%s m=%u",
1561
print_in_addr_t ((in_addr_t) net, 0, &gc),
1562
print_in_addr_t ((in_addr_t) mask, 0, &gc),
1563
print_in_addr_t ((in_addr_t) gw, 0, &gc),
1566
if (!net && !mask && metric < lowest_metric)
1569
lowest_metric = metric;
1583
*netmask = 0xFFFFFF00; /* FIXME -- get the real netmask of the adapter containing the default gateway */
1588
dmsg (D_ROUTE_DEBUG, "GDG: best=%s[%d] lm=%u",
1589
print_in_addr_t ((in_addr_t) best_gw, 0, &gc),
1591
(unsigned int)lowest_metric);
1598
#elif defined(TARGET_FREEBSD)||defined(TARGET_DRAGONFLY)
1600
#include <sys/types.h>
1601
#include <sys/socket.h>
1602
#include <netinet/in.h>
1604
/* all of this is taken from <net/route.h> in FreeBSD */
1606
#define RTA_GATEWAY 0x2
1607
#define RTA_NETMASK 0x4
1610
#define RTM_VERSION 5
1613
#define RTF_GATEWAY 0x2
1616
* These numbers are used by reliable protocols for determining
1617
* retransmission behavior and are included in the routing structure.
1620
u_long rmx_locks; /* Kernel must leave these values alone */
1621
u_long rmx_mtu; /* MTU for this path */
1622
u_long rmx_hopcount; /* max hops expected */
1623
u_long rmx_expire; /* lifetime for route, e.g. redirect */
1624
u_long rmx_recvpipe; /* inbound delay-bandwidth product */
1625
u_long rmx_sendpipe; /* outbound delay-bandwidth product */
1626
u_long rmx_ssthresh; /* outbound gateway buffer limit */
1627
u_long rmx_rtt; /* estimated round trip time */
1628
u_long rmx_rttvar; /* estimated rtt variance */
1629
u_long rmx_pksent; /* packets sent using this route */
1630
u_long rmx_filler[4]; /* will be used for T/TCP later */
1634
* Structures for routing messages.
1637
u_short rtm_msglen; /* to skip over non-understood messages */
1638
u_char rtm_version; /* future binary compatibility */
1639
u_char rtm_type; /* message type */
1640
u_short rtm_index; /* index for associated ifp */
1641
int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
1642
int rtm_addrs; /* bitmask identifying sockaddrs in msg */
1643
pid_t rtm_pid; /* identify sender */
1644
int rtm_seq; /* for sender to identify action */
1645
int rtm_errno; /* why failed */
1646
int rtm_use; /* from rtentry */
1647
u_long rtm_inits; /* which metrics we are initializing */
1648
struct rt_metrics rtm_rmx; /* metrics themselves */
1652
struct rt_msghdr m_rtm;
1656
#define ROUNDUP(a) \
1657
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
1660
get_default_gateway (in_addr_t *ret, in_addr_t *netmask)
1662
struct gc_arena gc = gc_new ();
1663
int s, seq, l, pid, rtm_addrs, i;
1664
struct sockaddr so_dst, so_mask;
1665
char *cp = m_rtmsg.m_space;
1666
struct sockaddr *gate = NULL, *sa;
1667
struct rt_msghdr *rtm_aux;
1669
#define NEXTADDR(w, u) \
1670
if (rtm_addrs & (w)) {\
1671
l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
1674
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
1676
#define rtm m_rtmsg.m_rtm
1680
rtm_addrs = RTA_DST | RTA_NETMASK;
1682
bzero(&so_dst, sizeof(so_dst));
1683
bzero(&so_mask, sizeof(so_mask));
1684
bzero(&rtm, sizeof(struct rt_msghdr));
1686
rtm.rtm_type = RTM_GET;
1687
rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
1688
rtm.rtm_version = RTM_VERSION;
1689
rtm.rtm_seq = ++seq;
1690
rtm.rtm_addrs = rtm_addrs;
1692
so_dst.sa_family = AF_INET;
1693
so_dst.sa_len = sizeof(struct sockaddr_in);
1694
so_mask.sa_family = AF_INET;
1695
so_mask.sa_len = sizeof(struct sockaddr_in);
1697
NEXTADDR(RTA_DST, so_dst);
1698
NEXTADDR(RTA_NETMASK, so_mask);
1700
rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1702
s = socket(PF_ROUTE, SOCK_RAW, 0);
1704
if (write(s, (char *)&m_rtmsg, l) < 0)
1706
warn("writing to routing socket");
1713
l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1714
} while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1720
cp = ((char *)(rtm_aux + 1));
1721
if (rtm_aux->rtm_addrs) {
1722
for (i = 1; i; i <<= 1)
1723
if (i & rtm_aux->rtm_addrs) {
1724
sa = (struct sockaddr *)cp;
1725
if (i == RTA_GATEWAY )
1739
*ret = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
1741
msg (M_INFO, "gw %s",
1742
print_in_addr_t ((in_addr_t) *ret, 0, &gc));
1747
*netmask = 0xFFFFFF00; // FIXME -- get the real netmask of the adapter containing the default gateway
1760
#elif defined(TARGET_DARWIN)
1762
#include <sys/types.h>
1763
#include <sys/socket.h>
1764
#include <netinet/in.h>
1766
/* all of this is taken from <net/route.h> in Darwin */
1768
#define RTA_GATEWAY 0x2
1769
#define RTA_NETMASK 0x4
1772
#define RTM_VERSION 5
1775
#define RTF_GATEWAY 0x2
1778
* These numbers are used by reliable protocols for determining
1779
* retransmission behavior and are included in the routing structure.
1782
u_long rmx_locks; /* Kernel must leave these values alone */
1783
u_long rmx_mtu; /* MTU for this path */
1784
u_long rmx_hopcount; /* max hops expected */
1785
u_long rmx_expire; /* lifetime for route, e.g. redirect */
1786
u_long rmx_recvpipe; /* inbound delay-bandwidth product */
1787
u_long rmx_sendpipe; /* outbound delay-bandwidth product */
1788
u_long rmx_ssthresh; /* outbound gateway buffer limit */
1789
u_long rmx_rtt; /* estimated round trip time */
1790
u_long rmx_rttvar; /* estimated rtt variance */
1791
u_long rmx_pksent; /* packets sent using this route */
1792
u_long rmx_filler[4]; /* will be used for T/TCP later */
1796
* Structures for routing messages.
1799
u_short rtm_msglen; /* to skip over non-understood messages */
1800
u_char rtm_version; /* future binary compatibility */
1801
u_char rtm_type; /* message type */
1802
u_short rtm_index; /* index for associated ifp */
1803
int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
1804
int rtm_addrs; /* bitmask identifying sockaddrs in msg */
1805
pid_t rtm_pid; /* identify sender */
1806
int rtm_seq; /* for sender to identify action */
1807
int rtm_errno; /* why failed */
1808
int rtm_use; /* from rtentry */
1809
u_long rtm_inits; /* which metrics we are initializing */
1810
struct rt_metrics rtm_rmx; /* metrics themselves */
1814
struct rt_msghdr m_rtm;
1818
#define ROUNDUP(a) \
1819
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
1822
get_default_gateway (in_addr_t *ret, in_addr_t *netmask)
1824
struct gc_arena gc = gc_new ();
1825
int s, seq, l, pid, rtm_addrs, i;
1826
struct sockaddr so_dst, so_mask;
1827
char *cp = m_rtmsg.m_space;
1828
struct sockaddr *gate = NULL, *sa;
1829
struct rt_msghdr *rtm_aux;
1831
#define NEXTADDR(w, u) \
1832
if (rtm_addrs & (w)) {\
1833
l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
1836
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
1838
#define rtm m_rtmsg.m_rtm
1842
rtm_addrs = RTA_DST | RTA_NETMASK;
1844
bzero(&so_dst, sizeof(so_dst));
1845
bzero(&so_mask, sizeof(so_mask));
1846
bzero(&rtm, sizeof(struct rt_msghdr));
1848
rtm.rtm_type = RTM_GET;
1849
rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
1850
rtm.rtm_version = RTM_VERSION;
1851
rtm.rtm_seq = ++seq;
1852
rtm.rtm_addrs = rtm_addrs;
1854
so_dst.sa_family = AF_INET;
1855
so_dst.sa_len = sizeof(struct sockaddr_in);
1856
so_mask.sa_family = AF_INET;
1857
so_mask.sa_len = sizeof(struct sockaddr_in);
1859
NEXTADDR(RTA_DST, so_dst);
1860
NEXTADDR(RTA_NETMASK, so_mask);
1862
rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
1864
s = socket(PF_ROUTE, SOCK_RAW, 0);
1866
if (write(s, (char *)&m_rtmsg, l) < 0)
1868
msg (M_WARN, "ROUTE: problem writing to routing socket");
1875
l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
1876
} while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
1882
cp = ((char *)(rtm_aux + 1));
1883
if (rtm_aux->rtm_addrs) {
1884
for (i = 1; i; i <<= 1)
1885
if (i & rtm_aux->rtm_addrs) {
1886
sa = (struct sockaddr *)cp;
1887
if (i == RTA_GATEWAY )
1901
*ret = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
1903
msg (M_INFO, "gw %s",
1904
print_in_addr_t ((in_addr_t) *ret, 0, &gc));
1909
*netmask = 0xFFFFFF00; // FIXME -- get the real netmask of the adapter containing the default gateway
1922
#elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD)
1924
#include <sys/types.h>
1925
#include <sys/socket.h>
1926
#include <netinet/in.h>
1928
/* all of this is taken from <net/route.h> in OpenBSD 3.6 */
1929
#define RTA_DST 0x1 /* destination sockaddr present */
1930
#define RTA_GATEWAY 0x2 /* gateway sockaddr present */
1931
#define RTA_NETMASK 0x4 /* netmask sockaddr present */
1933
#define RTM_GET 0x4 /* Report Metrics */
1935
#define RTM_VERSION 3 /* Up the ante and ignore older versions */
1937
#define RTF_UP 0x1 /* route usable */
1938
#define RTF_GATEWAY 0x2 /* destination is a gateway */
1941
* Huge version for userland compatibility.
1944
u_long rmx_locks; /* Kernel must leave these values alone */
1945
u_long rmx_mtu; /* MTU for this path */
1946
u_long rmx_hopcount; /* max hops expected */
1947
u_long rmx_expire; /* lifetime for route, e.g. redirect */
1948
u_long rmx_recvpipe; /* inbound delay-bandwidth product */
1949
u_long rmx_sendpipe; /* outbound delay-bandwidth product */
1950
u_long rmx_ssthresh; /* outbound gateway buffer limit */
1951
u_long rmx_rtt; /* estimated round trip time */
1952
u_long rmx_rttvar; /* estimated rtt variance */
1953
u_long rmx_pksent; /* packets sent using this route */
1957
* Structures for routing messages.
1960
u_short rtm_msglen; /* to skip over non-understood messages */
1961
u_char rtm_version; /* future binary compatibility */
1962
u_char rtm_type; /* message type */
1963
u_short rtm_index; /* index for associated ifp */
1964
int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
1965
int rtm_addrs; /* bitmask identifying sockaddrs in msg */
1966
pid_t rtm_pid; /* identify sender */
1967
int rtm_seq; /* for sender to identify action */
1968
int rtm_errno; /* why failed */
1969
int rtm_use; /* from rtentry */
1970
u_long rtm_inits; /* which metrics we are initializing */
1971
struct rt_metrics rtm_rmx; /* metrics themselves */
1975
struct rt_msghdr m_rtm;
1979
#define ROUNDUP(a) \
1980
((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
1983
get_default_gateway (in_addr_t *ret, in_addr_t *netmask)
1985
struct gc_arena gc = gc_new ();
1986
int s, seq, l, rtm_addrs, i;
1988
struct sockaddr so_dst, so_mask;
1989
char *cp = m_rtmsg.m_space;
1990
struct sockaddr *gate = NULL, *sa;
1991
struct rt_msghdr *rtm_aux;
1993
#define NEXTADDR(w, u) \
1994
if (rtm_addrs & (w)) {\
1995
l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\
1998
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
2000
#define rtm m_rtmsg.m_rtm
2004
rtm_addrs = RTA_DST | RTA_NETMASK;
2006
bzero(&so_dst, sizeof(so_dst));
2007
bzero(&so_mask, sizeof(so_mask));
2008
bzero(&rtm, sizeof(struct rt_msghdr));
2010
rtm.rtm_type = RTM_GET;
2011
rtm.rtm_flags = RTF_UP | RTF_GATEWAY;
2012
rtm.rtm_version = RTM_VERSION;
2013
rtm.rtm_seq = ++seq;
2014
rtm.rtm_addrs = rtm_addrs;
2016
so_dst.sa_family = AF_INET;
2017
so_dst.sa_len = sizeof(struct sockaddr_in);
2018
so_mask.sa_family = AF_INET;
2019
so_mask.sa_len = sizeof(struct sockaddr_in);
2021
NEXTADDR(RTA_DST, so_dst);
2022
NEXTADDR(RTA_NETMASK, so_mask);
2024
rtm.rtm_msglen = l = cp - (char *)&m_rtmsg;
2026
s = socket(PF_ROUTE, SOCK_RAW, 0);
2028
if (write(s, (char *)&m_rtmsg, l) < 0)
2030
warn("writing to routing socket");
2037
l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
2038
} while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid));
2044
cp = ((char *)(rtm_aux + 1));
2045
if (rtm_aux->rtm_addrs) {
2046
for (i = 1; i; i <<= 1)
2047
if (i & rtm_aux->rtm_addrs) {
2048
sa = (struct sockaddr *)cp;
2049
if (i == RTA_GATEWAY )
2063
*ret = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr);
2065
msg (M_INFO, "gw %s",
2066
print_in_addr_t ((in_addr_t) *ret, 0, &gc));
2071
*netmask = 0xFFFFFF00; // FIXME -- get the real netmask of the adapter containing the default gateway
2087
get_default_gateway (in_addr_t *ret, in_addr_t *netmask) /* PLATFORM-SPECIFIC */
2095
netmask_to_netbits (const in_addr_t network, const in_addr_t netmask, int *netbits)
2098
const int addrlen = sizeof (in_addr_t) * 8;
2100
if ((network & netmask) == network)
2102
for (i = 0; i <= addrlen; ++i)
2104
in_addr_t mask = netbits_to_netmask (i);
2105
if (mask == netmask)
2119
* get_bypass_addresses() is used by the redirect-gateway bypass-x
2120
* functions to build a route bypass to selected DHCP/DNS servers,
2121
* so that outgoing packets to these servers don't end up in the tunnel.
2127
add_host_route_if_nonlocal (struct route_bypass *rb, const in_addr_t addr)
2129
if (test_local_addr(addr) == TLA_NONLOCAL && addr != 0 && addr != ~0)
2130
add_bypass_address (rb, addr);
2134
add_host_route_array (struct route_bypass *rb, const IP_ADDR_STRING *iplist)
2138
bool succeed = false;
2139
const in_addr_t ip = getaddr (GETADDR_HOST_ORDER, iplist->IpAddress.String, 0, &succeed, NULL);
2142
add_host_route_if_nonlocal (rb, ip);
2144
iplist = iplist->Next;
2149
get_bypass_addresses (struct route_bypass *rb, const unsigned int flags)
2151
struct gc_arena gc = gc_new ();
2152
/*bool ret_bool = false;*/
2154
/* get full routing table */
2155
const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc);
2157
/* get the route which represents the default gateway */
2158
const MIB_IPFORWARDROW *row = get_default_gateway_row (routes);
2162
/* get the adapter which the default gateway is associated with */
2163
const IP_ADAPTER_INFO *dgi = get_adapter_info (row->dwForwardIfIndex, &gc);
2165
/* get extra adapter info, such as DNS addresses */
2166
const IP_PER_ADAPTER_INFO *pai = get_per_adapter_info (row->dwForwardIfIndex, &gc);
2168
/* Bypass DHCP server address */
2169
if ((flags & RG_BYPASS_DHCP) && dgi && dgi->DhcpEnabled)
2170
add_host_route_array (rb, &dgi->DhcpServer);
2172
/* Bypass DNS server addresses */
2173
if ((flags & RG_BYPASS_DNS) && pai)
2174
add_host_route_array (rb, &pai->DnsServerList);
2183
get_bypass_addresses (struct route_bypass *rb, const unsigned int flags) /* PLATFORM-SPECIFIC */
2191
#if defined(TARGET_LINUX)
2194
get_default_gateway_mac_addr (unsigned char *macaddr)
2196
struct ifreq *ifr, *ifend;
2197
in_addr_t ina, mask;
2200
struct ifreq ifs[20]; // Maximum number of interfaces to scan
2205
if (!get_default_gateway (&gwip, NULL))
2207
msg (M_WARN, "GDGMA: get_default_gateway failed");
2211
if ((sd = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
2213
msg (M_WARN, "GDGMA: socket() failed");
2217
ifc.ifc_len = sizeof (ifs);
2219
if (ioctl (sd, SIOCGIFCONF, &ifc) < 0)
2221
msg (M_WARN, "GDGMA: ioctl(SIOCGIFCONF) failed");
2225
/* scan through interface list */
2226
ifend = ifs + (ifc.ifc_len / sizeof (struct ifreq));
2227
for (ifr = ifc.ifc_req; ifr < ifend; ifr++)
2229
if (ifr->ifr_addr.sa_family == AF_INET)
2231
ina = ntohl(((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr);
2232
strncpynt (ifreq.ifr_name, ifr->ifr_name, sizeof (ifreq.ifr_name));
2234
dmsg (D_AUTO_USERID, "GDGMA: %s", ifreq.ifr_name);
2236
/* check that the interface is up, and not point-to-point or loopback */
2237
if (ioctl (sd, SIOCGIFFLAGS, &ifreq) < 0)
2239
dmsg (D_AUTO_USERID, "GDGMA: SIOCGIFFLAGS(%s) failed", ifreq.ifr_name);
2243
if ((ifreq.ifr_flags & (IFF_UP|IFF_LOOPBACK)) != IFF_UP)
2245
dmsg (D_AUTO_USERID, "GDGMA: interface %s is down or loopback", ifreq.ifr_name);
2249
/* get interface netmask and check for correct subnet */
2250
if (ioctl (sd, SIOCGIFNETMASK, &ifreq) < 0)
2252
dmsg (D_AUTO_USERID, "GDGMA: SIOCGIFNETMASK(%s) failed", ifreq.ifr_name);
2256
mask = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr);
2257
if (((gwip ^ ina) & mask) != 0)
2259
dmsg (D_AUTO_USERID, "GDGMA: gwip=0x%08x ina=0x%08x mask=0x%08x",
2262
(unsigned int)mask);
2270
msg (M_WARN, "GDGMA: couldn't find gw interface");
2274
/* now get the hardware address. */
2275
memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr));
2276
if (ioctl (sd, SIOCGIFHWADDR, &ifreq) < 0)
2278
msg (M_WARN, "GDGMA: SIOCGIFHWADDR(%s) failed", ifreq.ifr_name);
2282
memcpy (macaddr, &ifreq.ifr_hwaddr.sa_data, 6);
2291
#elif defined(WIN32)
2294
get_default_gateway_mac_addr (unsigned char *macaddr)
2296
struct gc_arena gc = gc_new ();
2297
const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc);
2300
const IP_ADAPTER_INFO *ai;
2302
if (!get_default_gateway (&gwip, NULL))
2304
msg (M_WARN, "GDGMA: get_default_gateway failed");
2308
a_index = adapter_index_of_ip (adapters, gwip, NULL, NULL);
2309
ai = get_adapter (adapters, a_index);
2313
msg (M_WARN, "GDGMA: couldn't find gw interface");
2317
memcpy (macaddr, ai->Address, 6);
2330
get_default_gateway_mac_addr (unsigned char *macaddr) /* PLATFORM-SPECIFIC */
2336
#endif /* AUTO_USERID */
2339
* Test if addr is reachable via a local interface (return ILA_LOCAL),
2340
* or if it needs to be routed via the default gateway (return
2341
* ILA_NONLOCAL). If the target platform doesn't implement this
2342
* function, return ILA_NOT_IMPLEMENTED.
2344
* Used by redirect-gateway autolocal feature
2350
test_local_addr (const in_addr_t addr)
2352
struct gc_arena gc = gc_new ();
2353
const in_addr_t nonlocal_netmask = 0x80000000L; /* routes with netmask <= to this are considered non-local */
2354
bool ret = TLA_NONLOCAL;
2356
/* get full routing table */
2357
const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc);
2361
for (i = 0; i < rt->dwNumEntries; ++i)
2363
const MIB_IPFORWARDROW *row = &rt->table[i];
2364
const in_addr_t net = ntohl (row->dwForwardDest);
2365
const in_addr_t mask = ntohl (row->dwForwardMask);
2366
if (mask > nonlocal_netmask && (addr & mask) == net)
2382
test_local_addr (const in_addr_t addr) /* PLATFORM-SPECIFIC */
2384
return TLA_NOT_IMPLEMENTED;