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Commit | Line | Data |
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6fbf66fa JY |
1 | /* |
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 | |
6 | * packet compression. | |
7 | * | |
564a2109 | 8 | * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net> |
6fbf66fa JY |
9 | * |
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. | |
13 | * | |
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. | |
18 | * | |
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 | |
23 | */ | |
24 | ||
25 | /* | |
26 | * Support routines for adding/deleting network routes. | |
27 | */ | |
28 | ||
c110b289 ABL |
29 | #ifdef HAVE_CONFIG_H |
30 | #include "config.h" | |
31 | #elif defined(_MSC_VER) | |
32 | #include "config-msvc.h" | |
33 | #endif | |
34 | ||
6fbf66fa JY |
35 | #include "syshead.h" |
36 | ||
37 | #include "common.h" | |
38 | #include "error.h" | |
39 | #include "route.h" | |
40 | #include "misc.h" | |
41 | #include "socket.h" | |
42 | #include "manage.h" | |
5a2e9a25 | 43 | #include "win32.h" |
1840c852 | 44 | #include "options.h" |
6fbf66fa JY |
45 | |
46 | #include "memdbg.h" | |
47 | ||
12e46092 ABL |
48 | #ifdef WIN32 |
49 | #define METRIC_NOT_USED ((DWORD)-1) | |
50 | #endif | |
51 | ||
b57e005b | 52 | static void delete_route (struct route_ipv4 *r, const struct tuntap *tt, unsigned int flags, const struct route_gateway_info *rgi, const struct env_set *es); |
576dc96c | 53 | |
3c7f2f55 JY |
54 | static void get_bypass_addresses (struct route_bypass *rb, const unsigned int flags); |
55 | ||
56 | #ifdef ENABLE_DEBUG | |
57 | ||
58 | static void | |
59 | print_bypass_addresses (const struct route_bypass *rb) | |
60 | { | |
61 | struct gc_arena gc = gc_new (); | |
62 | int i; | |
63 | for (i = 0; i < rb->n_bypass; ++i) | |
64 | { | |
775a6ac2 | 65 | msg (D_ROUTE, "ROUTE: bypass_host_route[%d]=%s", |
3c7f2f55 JY |
66 | i, |
67 | print_in_addr_t (rb->bypass[i], 0, &gc)); | |
68 | } | |
69 | gc_free (&gc); | |
70 | } | |
71 | ||
72 | #endif | |
73 | ||
d02a86d3 JY |
74 | static bool |
75 | add_bypass_address (struct route_bypass *rb, const in_addr_t a) | |
76 | { | |
77 | int i; | |
78 | for (i = 0; i < rb->n_bypass; ++i) | |
79 | { | |
80 | if (a == rb->bypass[i]) /* avoid duplicates */ | |
81 | return true; | |
82 | } | |
83 | if (rb->n_bypass < N_ROUTE_BYPASS) | |
84 | { | |
85 | rb->bypass[rb->n_bypass++] = a; | |
86 | return true; | |
87 | } | |
88 | else | |
89 | { | |
90 | return false; | |
91 | } | |
92 | } | |
93 | ||
6fbf66fa | 94 | struct route_option_list * |
673f583f | 95 | new_route_option_list (const int max_routes, struct gc_arena *a) |
6fbf66fa JY |
96 | { |
97 | struct route_option_list *ret; | |
673f583f JY |
98 | ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_option_list, struct route_option, max_routes, a); |
99 | ret->capacity = max_routes; | |
6fbf66fa JY |
100 | return ret; |
101 | } | |
102 | ||
512cda46 GD |
103 | struct route_ipv6_option_list * |
104 | new_route_ipv6_option_list (const int max_routes, struct gc_arena *a) | |
105 | { | |
106 | struct route_ipv6_option_list *ret; | |
107 | ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_ipv6_option_list, struct route_ipv6_option, max_routes, a); | |
108 | ret->capacity = max_routes; | |
109 | return ret; | |
110 | } | |
111 | ||
673f583f JY |
112 | struct route_option_list * |
113 | clone_route_option_list (const struct route_option_list *src, struct gc_arena *a) | |
114 | { | |
115 | const size_t rl_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list)); | |
116 | struct route_option_list *ret = gc_malloc (rl_size, false, a); | |
117 | memcpy (ret, src, rl_size); | |
118 | return ret; | |
119 | } | |
120 | ||
91402236 GD |
121 | struct route_ipv6_option_list * |
122 | clone_route_ipv6_option_list (const struct route_ipv6_option_list *src, struct gc_arena *a) | |
123 | { | |
124 | const size_t rl_size = array_mult_safe (sizeof(struct route_ipv6_option), src->capacity, sizeof(struct route_ipv6_option_list)); | |
125 | struct route_ipv6_option_list *ret = gc_malloc (rl_size, false, a); | |
126 | memcpy (ret, src, rl_size); | |
127 | return ret; | |
128 | } | |
129 | ||
673f583f JY |
130 | void |
131 | copy_route_option_list (struct route_option_list *dest, const struct route_option_list *src) | |
132 | { | |
133 | const size_t src_size = array_mult_safe (sizeof(struct route_option), src->capacity, sizeof(struct route_option_list)); | |
6abb6cdd GD |
134 | if (src->capacity > dest->capacity) |
135 | msg (M_FATAL, PACKAGE_NAME " ROUTE: (copy) number of route options in src (%d) is greater than route list capacity in dest (%d)", src->capacity, dest->capacity); | |
673f583f JY |
136 | memcpy (dest, src, src_size); |
137 | } | |
138 | ||
91402236 GD |
139 | void |
140 | copy_route_ipv6_option_list (struct route_ipv6_option_list *dest, | |
141 | const struct route_ipv6_option_list *src) | |
142 | { | |
143 | const size_t src_size = array_mult_safe (sizeof(struct route_ipv6_option), src->capacity, sizeof(struct route_ipv6_option_list)); | |
6abb6cdd GD |
144 | if (src->capacity > dest->capacity) |
145 | msg (M_FATAL, PACKAGE_NAME " ROUTE: (copy) number of route options in src (%d) is greater than route list capacity in dest (%d)", src->capacity, dest->capacity); | |
91402236 GD |
146 | memcpy (dest, src, src_size); |
147 | } | |
148 | ||
6fbf66fa | 149 | struct route_list * |
673f583f | 150 | new_route_list (const int max_routes, struct gc_arena *a) |
6fbf66fa JY |
151 | { |
152 | struct route_list *ret; | |
b57e005b | 153 | ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_list, struct route_ipv4, max_routes, a); |
673f583f | 154 | ret->capacity = max_routes; |
6fbf66fa JY |
155 | return ret; |
156 | } | |
157 | ||
512cda46 GD |
158 | struct route_ipv6_list * |
159 | new_route_ipv6_list (const int max_routes, struct gc_arena *a) | |
160 | { | |
161 | struct route_ipv6_list *ret; | |
162 | ALLOC_VAR_ARRAY_CLEAR_GC (ret, struct route_ipv6_list, struct route_ipv6, max_routes, a); | |
163 | ret->capacity = max_routes; | |
164 | return ret; | |
165 | } | |
166 | ||
6fbf66fa | 167 | static const char * |
b57e005b | 168 | route_string (const struct route_ipv4 *r, struct gc_arena *gc) |
6fbf66fa JY |
169 | { |
170 | struct buffer out = alloc_buf_gc (256, gc); | |
171 | buf_printf (&out, "ROUTE network %s netmask %s gateway %s", | |
172 | print_in_addr_t (r->network, 0, gc), | |
173 | print_in_addr_t (r->netmask, 0, gc), | |
174 | print_in_addr_t (r->gateway, 0, gc) | |
175 | ); | |
7fb0e07e | 176 | if (r->flags & RT_METRIC_DEFINED) |
6fbf66fa JY |
177 | buf_printf (&out, " metric %d", r->metric); |
178 | return BSTR (&out); | |
179 | } | |
180 | ||
181 | static bool | |
182 | is_route_parm_defined (const char *parm) | |
183 | { | |
184 | if (!parm) | |
185 | return false; | |
186 | if (!strcmp (parm, "default")) | |
187 | return false; | |
188 | return true; | |
189 | } | |
190 | ||
191 | static void | |
192 | setenv_route_addr (struct env_set *es, const char *key, const in_addr_t addr, int i) | |
193 | { | |
194 | struct gc_arena gc = gc_new (); | |
195 | struct buffer name = alloc_buf_gc (256, &gc); | |
196 | if (i >= 0) | |
197 | buf_printf (&name, "route_%s_%d", key, i); | |
198 | else | |
199 | buf_printf (&name, "route_%s", key); | |
200 | setenv_str (es, BSTR (&name), print_in_addr_t (addr, 0, &gc)); | |
201 | gc_free (&gc); | |
202 | } | |
203 | ||
204 | static bool | |
7fb0e07e | 205 | get_special_addr (const struct route_list *rl, |
6fbf66fa JY |
206 | const char *string, |
207 | in_addr_t *out, | |
208 | bool *status) | |
209 | { | |
b4073a76 JY |
210 | if (status) |
211 | *status = true; | |
6fbf66fa JY |
212 | if (!strcmp (string, "vpn_gateway")) |
213 | { | |
7fb0e07e | 214 | if (rl) |
6fbf66fa | 215 | { |
7fb0e07e JY |
216 | if (rl->spec.flags & RTSA_REMOTE_ENDPOINT) |
217 | *out = rl->spec.remote_endpoint; | |
b4073a76 JY |
218 | else |
219 | { | |
220 | msg (M_INFO, PACKAGE_NAME " ROUTE: vpn_gateway undefined"); | |
221 | if (status) | |
222 | *status = false; | |
223 | } | |
6fbf66fa JY |
224 | } |
225 | return true; | |
226 | } | |
227 | else if (!strcmp (string, "net_gateway")) | |
228 | { | |
7fb0e07e | 229 | if (rl) |
6fbf66fa | 230 | { |
7fb0e07e JY |
231 | if (rl->rgi.flags & RGI_ADDR_DEFINED) |
232 | *out = rl->rgi.gateway.addr; | |
b4073a76 JY |
233 | else |
234 | { | |
235 | msg (M_INFO, PACKAGE_NAME " ROUTE: net_gateway undefined -- unable to get default gateway from system"); | |
236 | if (status) | |
237 | *status = false; | |
238 | } | |
6fbf66fa JY |
239 | } |
240 | return true; | |
241 | } | |
242 | else if (!strcmp (string, "remote_host")) | |
243 | { | |
7fb0e07e | 244 | if (rl) |
6fbf66fa | 245 | { |
7fb0e07e JY |
246 | if (rl->spec.flags & RTSA_REMOTE_HOST) |
247 | *out = rl->spec.remote_host; | |
b4073a76 JY |
248 | else |
249 | { | |
250 | msg (M_INFO, PACKAGE_NAME " ROUTE: remote_host undefined"); | |
251 | if (status) | |
252 | *status = false; | |
253 | } | |
6fbf66fa JY |
254 | } |
255 | return true; | |
256 | } | |
257 | return false; | |
258 | } | |
259 | ||
b4073a76 JY |
260 | bool |
261 | is_special_addr (const char *addr_str) | |
262 | { | |
263 | if (addr_str) | |
264 | return get_special_addr (NULL, addr_str, NULL, NULL); | |
265 | else | |
266 | return false; | |
267 | } | |
268 | ||
6fbf66fa | 269 | static bool |
b57e005b | 270 | init_route (struct route_ipv4 *r, |
f2d6f3bc | 271 | struct addrinfo **network_list, |
6fbf66fa | 272 | const struct route_option *ro, |
7fb0e07e | 273 | const struct route_list *rl) |
6fbf66fa | 274 | { |
32e576d2 | 275 | const in_addr_t default_netmask = IPV4_NETMASK_HOST; |
6fbf66fa | 276 | bool status; |
f2d6f3bc AS |
277 | int ret; |
278 | struct in_addr special; | |
6fbf66fa | 279 | |
7fb0e07e | 280 | CLEAR (*r); |
6fbf66fa | 281 | r->option = ro; |
6fbf66fa JY |
282 | |
283 | /* network */ | |
284 | ||
285 | if (!is_route_parm_defined (ro->network)) | |
286 | { | |
287 | goto fail; | |
288 | } | |
f2d6f3bc AS |
289 | |
290 | ||
291 | /* get_special_addr replaces specialaddr with a special ip addr | |
292 | like gw. getaddrinfo is called to convert a a addrinfo struct */ | |
293 | ||
294 | if(get_special_addr (rl, ro->network, &special.s_addr, &status)) | |
6fbf66fa | 295 | { |
f2d6f3bc | 296 | special.s_addr = htonl(special.s_addr); |
076fd3e4 | 297 | ret = openvpn_getaddrinfo(0, inet_ntoa(special), NULL, 0, NULL, |
f2d6f3bc | 298 | AF_INET, network_list); |
6fbf66fa | 299 | } |
f2d6f3bc AS |
300 | else |
301 | ret = openvpn_getaddrinfo(GETADDR_RESOLVE | GETADDR_WARN_ON_SIGNAL, | |
076fd3e4 | 302 | ro->network, NULL, 0, NULL, AF_INET, network_list); |
f2d6f3bc AS |
303 | |
304 | status = (ret == 0); | |
6fbf66fa JY |
305 | |
306 | if (!status) | |
307 | goto fail; | |
308 | ||
309 | /* netmask */ | |
310 | ||
311 | if (is_route_parm_defined (ro->netmask)) | |
312 | { | |
313 | r->netmask = getaddr ( | |
314 | GETADDR_HOST_ORDER | |
315 | | GETADDR_WARN_ON_SIGNAL, | |
316 | ro->netmask, | |
317 | 0, | |
318 | &status, | |
319 | NULL); | |
320 | if (!status) | |
321 | goto fail; | |
322 | } | |
323 | else | |
324 | r->netmask = default_netmask; | |
325 | ||
326 | /* gateway */ | |
327 | ||
328 | if (is_route_parm_defined (ro->gateway)) | |
329 | { | |
7fb0e07e | 330 | if (!get_special_addr (rl, ro->gateway, &r->gateway, &status)) |
6fbf66fa JY |
331 | { |
332 | r->gateway = getaddr ( | |
333 | GETADDR_RESOLVE | |
334 | | GETADDR_HOST_ORDER | |
335 | | GETADDR_WARN_ON_SIGNAL, | |
336 | ro->gateway, | |
337 | 0, | |
338 | &status, | |
339 | NULL); | |
340 | } | |
341 | if (!status) | |
342 | goto fail; | |
343 | } | |
344 | else | |
345 | { | |
7fb0e07e JY |
346 | if (rl->spec.flags & RTSA_REMOTE_ENDPOINT) |
347 | r->gateway = rl->spec.remote_endpoint; | |
6fbf66fa JY |
348 | else |
349 | { | |
350 | 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"); | |
351 | goto fail; | |
352 | } | |
353 | } | |
354 | ||
355 | /* metric */ | |
356 | ||
6fbf66fa JY |
357 | r->metric = 0; |
358 | if (is_route_parm_defined (ro->metric)) | |
359 | { | |
360 | r->metric = atoi (ro->metric); | |
361 | if (r->metric < 0) | |
362 | { | |
363 | msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0", | |
364 | ro->network, | |
365 | ro->metric); | |
366 | goto fail; | |
367 | } | |
7fb0e07e | 368 | r->flags |= RT_METRIC_DEFINED; |
6fbf66fa | 369 | } |
7fb0e07e | 370 | else if (rl->spec.flags & RTSA_DEFAULT_METRIC) |
6fbf66fa | 371 | { |
7fb0e07e JY |
372 | r->metric = rl->spec.default_metric; |
373 | r->flags |= RT_METRIC_DEFINED; | |
6fbf66fa JY |
374 | } |
375 | ||
7fb0e07e | 376 | r->flags |= RT_DEFINED; |
6fbf66fa JY |
377 | |
378 | return true; | |
379 | ||
380 | fail: | |
381 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s", | |
382 | ro->network); | |
6fbf66fa JY |
383 | return false; |
384 | } | |
385 | ||
512cda46 GD |
386 | static bool |
387 | init_route_ipv6 (struct route_ipv6 *r6, | |
388 | const struct route_ipv6_option *r6o, | |
389 | const struct route_ipv6_list *rl6 ) | |
390 | { | |
512cda46 GD |
391 | r6->defined = false; |
392 | ||
1840c852 | 393 | if ( !get_ipv6_addr( r6o->prefix, &r6->network, &r6->netbits, NULL, M_WARN )) |
512cda46 GD |
394 | goto fail; |
395 | ||
396 | /* gateway */ | |
397 | if (is_route_parm_defined (r6o->gateway)) | |
398 | { | |
399 | if ( inet_pton( AF_INET6, r6o->gateway, &r6->gateway ) != 1 ) | |
400 | { | |
401 | msg( M_WARN, PACKAGE_NAME "ROUTE6: cannot parse gateway spec '%s'", r6o->gateway ); | |
402 | } | |
403 | } | |
404 | else if (rl6->remote_endpoint_defined) | |
405 | { | |
406 | r6->gateway = rl6->remote_endpoint_ipv6; | |
407 | } | |
408 | else | |
409 | { | |
410 | msg (M_WARN, PACKAGE_NAME " ROUTE6: " PACKAGE_NAME " needs a gateway parameter for a --route-ipv6 option and no default was specified by either --route-ipv6-gateway or --ifconfig-ipv6 options"); | |
411 | goto fail; | |
412 | } | |
413 | ||
414 | /* metric */ | |
415 | ||
416 | r6->metric_defined = false; | |
c37d9135 | 417 | r6->metric = -1; |
512cda46 GD |
418 | if (is_route_parm_defined (r6o->metric)) |
419 | { | |
420 | r6->metric = atoi (r6o->metric); | |
421 | if (r6->metric < 0) | |
422 | { | |
423 | msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0", | |
424 | r6o->prefix, | |
425 | r6o->metric); | |
426 | goto fail; | |
427 | } | |
428 | r6->metric_defined = true; | |
429 | } | |
430 | else if (rl6->default_metric_defined) | |
431 | { | |
432 | r6->metric = rl6->default_metric; | |
433 | r6->metric_defined = true; | |
434 | } | |
435 | ||
436 | r6->defined = true; | |
437 | ||
438 | return true; | |
439 | ||
440 | fail: | |
441 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s", | |
442 | r6o->prefix); | |
443 | r6->defined = false; | |
444 | return false; | |
445 | } | |
446 | ||
6fbf66fa JY |
447 | void |
448 | add_route_to_option_list (struct route_option_list *l, | |
449 | const char *network, | |
450 | const char *netmask, | |
451 | const char *gateway, | |
452 | const char *metric) | |
453 | { | |
454 | struct route_option *ro; | |
673f583f JY |
455 | if (l->n >= l->capacity) |
456 | msg (M_FATAL, PACKAGE_NAME " ROUTE: cannot add more than %d routes -- please increase the max-routes option in the client configuration file", | |
457 | l->capacity); | |
6fbf66fa JY |
458 | ro = &l->routes[l->n]; |
459 | ro->network = network; | |
460 | ro->netmask = netmask; | |
461 | ro->gateway = gateway; | |
462 | ro->metric = metric; | |
463 | ++l->n; | |
464 | } | |
465 | ||
512cda46 GD |
466 | void |
467 | add_route_ipv6_to_option_list (struct route_ipv6_option_list *l, | |
468 | const char *prefix, | |
469 | const char *gateway, | |
470 | const char *metric) | |
471 | { | |
472 | struct route_ipv6_option *ro; | |
473 | if (l->n >= l->capacity) | |
474 | msg (M_FATAL, PACKAGE_NAME " ROUTE: cannot add more than %d IPv6 routes -- please increase the max-routes option in the client configuration file", | |
475 | l->capacity); | |
476 | ro = &l->routes_ipv6[l->n]; | |
477 | ro->prefix = prefix; | |
478 | ro->gateway = gateway; | |
479 | ro->metric = metric; | |
480 | ++l->n; | |
481 | } | |
482 | ||
6fbf66fa JY |
483 | void |
484 | clear_route_list (struct route_list *rl) | |
485 | { | |
673f583f | 486 | const int capacity = rl->capacity; |
b57e005b | 487 | const size_t rl_size = array_mult_safe (sizeof(struct route_ipv4), capacity, sizeof(struct route_list)); |
673f583f JY |
488 | memset(rl, 0, rl_size); |
489 | rl->capacity = capacity; | |
6fbf66fa JY |
490 | } |
491 | ||
512cda46 GD |
492 | void |
493 | clear_route_ipv6_list (struct route_ipv6_list *rl6) | |
494 | { | |
495 | const int capacity = rl6->capacity; | |
496 | const size_t rl6_size = array_mult_safe (sizeof(struct route_ipv6), capacity, sizeof(struct route_ipv6_list)); | |
497 | memset(rl6, 0, rl6_size); | |
498 | rl6->capacity = capacity; | |
499 | } | |
500 | ||
03731db3 | 501 | void |
7fb0e07e JY |
502 | route_list_add_vpn_gateway (struct route_list *rl, |
503 | struct env_set *es, | |
504 | const in_addr_t addr) | |
03731db3 | 505 | { |
eb95f367 | 506 | ASSERT(rl); |
03731db3 | 507 | rl->spec.remote_endpoint = addr; |
7fb0e07e | 508 | rl->spec.flags |= RTSA_REMOTE_ENDPOINT; |
03731db3 JY |
509 | setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1); |
510 | } | |
511 | ||
7fb0e07e JY |
512 | static void |
513 | add_block_local_item (struct route_list *rl, | |
514 | const struct route_gateway_address *gateway, | |
515 | in_addr_t target) | |
516 | { | |
517 | const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED); | |
518 | if ((rl->rgi.flags & rgi_needed) == rgi_needed | |
519 | && rl->rgi.gateway.netmask < 0xFFFFFFFF | |
520 | && (rl->n)+2 <= rl->capacity) | |
521 | { | |
b57e005b | 522 | struct route_ipv4 r; |
7fb0e07e JY |
523 | unsigned int l2; |
524 | ||
525 | /* split a route into two smaller blocking routes, and direct them to target */ | |
526 | CLEAR(r); | |
527 | r.flags = RT_DEFINED; | |
528 | r.gateway = target; | |
a3beba00 | 529 | r.network = gateway->addr & gateway->netmask; |
7fb0e07e JY |
530 | l2 = ((~gateway->netmask)+1)>>1; |
531 | r.netmask = ~(l2-1); | |
7fb0e07e JY |
532 | rl->routes[rl->n++] = r; |
533 | r.network += l2; | |
534 | rl->routes[rl->n++] = r; | |
535 | } | |
536 | } | |
537 | ||
538 | static void | |
539 | add_block_local (struct route_list *rl) | |
540 | { | |
541 | const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED); | |
542 | if ((rl->flags & RG_BLOCK_LOCAL) | |
543 | && (rl->rgi.flags & rgi_needed) == rgi_needed | |
544 | && (rl->spec.flags & RTSA_REMOTE_ENDPOINT) | |
545 | && rl->spec.remote_host_local != TLA_LOCAL) | |
546 | { | |
547 | size_t i; | |
548 | ||
549 | /* add bypass for gateway addr */ | |
550 | add_bypass_address (&rl->spec.bypass, rl->rgi.gateway.addr); | |
551 | ||
552 | /* block access to local subnet */ | |
553 | add_block_local_item (rl, &rl->rgi.gateway, rl->spec.remote_endpoint); | |
554 | ||
555 | /* process additional subnets on gateway interface */ | |
556 | for (i = 0; i < rl->rgi.n_addrs; ++i) | |
557 | { | |
558 | const struct route_gateway_address *gwa = &rl->rgi.addrs[i]; | |
559 | /* omit the add/subnet in &rl->rgi which we processed above */ | |
560 | if (!((rl->rgi.gateway.addr & rl->rgi.gateway.netmask) == (gwa->addr & gwa->netmask) | |
561 | && rl->rgi.gateway.netmask == gwa->netmask)) | |
562 | add_block_local_item (rl, gwa, rl->spec.remote_endpoint); | |
563 | } | |
564 | } | |
565 | } | |
566 | ||
6fbf66fa JY |
567 | bool |
568 | init_route_list (struct route_list *rl, | |
569 | const struct route_option_list *opt, | |
570 | const char *remote_endpoint, | |
40ac3d7a | 571 | int default_metric, |
6fbf66fa JY |
572 | in_addr_t remote_host, |
573 | struct env_set *es) | |
574 | { | |
3c7f2f55 | 575 | struct gc_arena gc = gc_new (); |
6fbf66fa JY |
576 | bool ret = true; |
577 | ||
578 | clear_route_list (rl); | |
579 | ||
3c7f2f55 JY |
580 | rl->flags = opt->flags; |
581 | ||
6fbf66fa JY |
582 | if (remote_host) |
583 | { | |
584 | rl->spec.remote_host = remote_host; | |
7fb0e07e | 585 | rl->spec.flags |= RTSA_REMOTE_HOST; |
6fbf66fa JY |
586 | } |
587 | ||
40ac3d7a JY |
588 | if (default_metric) |
589 | { | |
590 | rl->spec.default_metric = default_metric; | |
7fb0e07e | 591 | rl->spec.flags |= RTSA_DEFAULT_METRIC; |
40ac3d7a JY |
592 | } |
593 | ||
7fb0e07e JY |
594 | get_default_gateway (&rl->rgi); |
595 | if (rl->rgi.flags & RGI_ADDR_DEFINED) | |
6fbf66fa | 596 | { |
7fb0e07e JY |
597 | setenv_route_addr (es, "net_gateway", rl->rgi.gateway.addr, -1); |
598 | #ifdef ENABLE_DEBUG | |
599 | print_default_gateway (D_ROUTE, &rl->rgi); | |
600 | #endif | |
3c7f2f55 | 601 | } |
03653f42 JY |
602 | else |
603 | { | |
775a6ac2 | 604 | dmsg (D_ROUTE, "ROUTE: default_gateway=UNDEF"); |
03653f42 | 605 | } |
3c7f2f55 | 606 | |
7fb0e07e JY |
607 | if (rl->spec.flags & RTSA_REMOTE_HOST) |
608 | rl->spec.remote_host_local = test_local_addr (remote_host, &rl->rgi); | |
6fbf66fa JY |
609 | |
610 | if (is_route_parm_defined (remote_endpoint)) | |
611 | { | |
7fb0e07e | 612 | bool defined = false; |
6fbf66fa JY |
613 | rl->spec.remote_endpoint = getaddr ( |
614 | GETADDR_RESOLVE | |
615 | | GETADDR_HOST_ORDER | |
616 | | GETADDR_WARN_ON_SIGNAL, | |
617 | remote_endpoint, | |
618 | 0, | |
7fb0e07e | 619 | &defined, |
6fbf66fa JY |
620 | NULL); |
621 | ||
7fb0e07e | 622 | if (defined) |
6fbf66fa JY |
623 | { |
624 | setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1); | |
7fb0e07e | 625 | rl->spec.flags |= RTSA_REMOTE_ENDPOINT; |
6fbf66fa JY |
626 | } |
627 | else | |
628 | { | |
629 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s", | |
630 | remote_endpoint); | |
631 | ret = false; | |
632 | } | |
633 | } | |
7fb0e07e JY |
634 | |
635 | if (rl->flags & RG_ENABLE) | |
636 | { | |
637 | add_block_local (rl); | |
638 | get_bypass_addresses (&rl->spec.bypass, rl->flags); | |
639 | #ifdef ENABLE_DEBUG | |
640 | print_bypass_addresses (&rl->spec.bypass); | |
641 | #endif | |
642 | } | |
6fbf66fa | 643 | |
6fbf66fa JY |
644 | /* parse the routes from opt to rl */ |
645 | { | |
7fb0e07e JY |
646 | int i = 0; |
647 | int j = rl->n; | |
f9b2ada0 | 648 | bool warned = false; |
6fbf66fa JY |
649 | for (i = 0; i < opt->n; ++i) |
650 | { | |
f2d6f3bc | 651 | struct addrinfo* netlist; |
b57e005b | 652 | struct route_ipv4 r; |
59afc4a5 | 653 | |
f9b2ada0 JY |
654 | if (!init_route (&r, |
655 | &netlist, | |
6fbf66fa | 656 | &opt->routes[i], |
7fb0e07e | 657 | rl)) |
6fbf66fa JY |
658 | ret = false; |
659 | else | |
f9b2ada0 | 660 | { |
f2d6f3bc AS |
661 | struct addrinfo* curele; |
662 | for (curele = netlist; curele; curele = curele->ai_next) | |
f9b2ada0 JY |
663 | { |
664 | if (j < rl->capacity) | |
665 | { | |
f2d6f3bc | 666 | r.network = ntohl(((struct sockaddr_in*)(curele)->ai_addr)->sin_addr.s_addr); |
f9b2ada0 JY |
667 | rl->routes[j++] = r; |
668 | } | |
669 | else | |
670 | { | |
671 | if (!warned) | |
672 | { | |
673 | msg (M_WARN, PACKAGE_NAME " ROUTE: routes dropped because number of expanded routes is greater than route list capacity (%d)", rl->capacity); | |
674 | warned = true; | |
675 | } | |
676 | } | |
677 | } | |
f2d6f3bc | 678 | freeaddrinfo(netlist); |
f9b2ada0 | 679 | } |
6fbf66fa JY |
680 | } |
681 | rl->n = j; | |
682 | } | |
683 | ||
3c7f2f55 | 684 | gc_free (&gc); |
6fbf66fa JY |
685 | return ret; |
686 | } | |
687 | ||
512cda46 GD |
688 | bool |
689 | init_route_ipv6_list (struct route_ipv6_list *rl6, | |
690 | const struct route_ipv6_option_list *opt6, | |
691 | const char *remote_endpoint, | |
692 | int default_metric, | |
693 | struct env_set *es) | |
694 | { | |
695 | struct gc_arena gc = gc_new (); | |
696 | bool ret = true; | |
697 | ||
698 | clear_route_ipv6_list (rl6); | |
699 | ||
700 | rl6->flags = opt6->flags; | |
701 | ||
c37d9135 | 702 | if (default_metric >= 0 ) |
512cda46 GD |
703 | { |
704 | rl6->default_metric = default_metric; | |
705 | rl6->default_metric_defined = true; | |
706 | } | |
707 | ||
708 | /* "default_gateway" is stuff for "redirect-gateway", which we don't | |
709 | * do for IPv6 yet -> TODO | |
710 | */ | |
711 | { | |
712 | dmsg (D_ROUTE, "ROUTE6: default_gateway=UNDEF"); | |
713 | } | |
714 | ||
715 | if ( is_route_parm_defined( remote_endpoint )) | |
716 | { | |
717 | if ( inet_pton( AF_INET6, remote_endpoint, | |
718 | &rl6->remote_endpoint_ipv6) == 1 ) | |
719 | { | |
720 | rl6->remote_endpoint_defined = true; | |
721 | } | |
722 | else | |
723 | { | |
724 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s", remote_endpoint); | |
725 | ret = false; | |
726 | } | |
727 | } | |
728 | else | |
729 | rl6->remote_endpoint_defined = false; | |
730 | ||
731 | ||
732 | if (!(opt6->n >= 0 && opt6->n <= rl6->capacity)) | |
733 | msg (M_FATAL, PACKAGE_NAME " ROUTE6: (init) number of route options (%d) is greater than route list capacity (%d)", opt6->n, rl6->capacity); | |
734 | ||
735 | /* parse the routes from opt to rl6 */ | |
736 | { | |
737 | int i, j = 0; | |
738 | for (i = 0; i < opt6->n; ++i) | |
739 | { | |
740 | if (!init_route_ipv6 (&rl6->routes_ipv6[j], | |
741 | &opt6->routes_ipv6[i], | |
742 | rl6 )) | |
743 | ret = false; | |
744 | else | |
745 | ++j; | |
746 | } | |
747 | rl6->n = j; | |
748 | } | |
749 | ||
750 | gc_free (&gc); | |
751 | return ret; | |
752 | } | |
753 | ||
6fbf66fa JY |
754 | static void |
755 | add_route3 (in_addr_t network, | |
756 | in_addr_t netmask, | |
757 | in_addr_t gateway, | |
758 | const struct tuntap *tt, | |
759 | unsigned int flags, | |
7fb0e07e | 760 | const struct route_gateway_info *rgi, |
6fbf66fa JY |
761 | const struct env_set *es) |
762 | { | |
b57e005b | 763 | struct route_ipv4 r; |
6fbf66fa | 764 | CLEAR (r); |
7fb0e07e | 765 | r.flags = RT_DEFINED; |
6fbf66fa JY |
766 | r.network = network; |
767 | r.netmask = netmask; | |
768 | r.gateway = gateway; | |
7fb0e07e | 769 | add_route (&r, tt, flags, rgi, es); |
6fbf66fa JY |
770 | } |
771 | ||
772 | static void | |
773 | del_route3 (in_addr_t network, | |
774 | in_addr_t netmask, | |
775 | in_addr_t gateway, | |
776 | const struct tuntap *tt, | |
777 | unsigned int flags, | |
7fb0e07e | 778 | const struct route_gateway_info *rgi, |
6fbf66fa JY |
779 | const struct env_set *es) |
780 | { | |
b57e005b | 781 | struct route_ipv4 r; |
6fbf66fa | 782 | CLEAR (r); |
7fb0e07e | 783 | r.flags = RT_DEFINED|RT_ADDED; |
6fbf66fa JY |
784 | r.network = network; |
785 | r.netmask = netmask; | |
786 | r.gateway = gateway; | |
7fb0e07e | 787 | delete_route (&r, tt, flags, rgi, es); |
6fbf66fa JY |
788 | } |
789 | ||
3c7f2f55 JY |
790 | static void |
791 | add_bypass_routes (struct route_bypass *rb, | |
792 | in_addr_t gateway, | |
793 | const struct tuntap *tt, | |
794 | unsigned int flags, | |
7fb0e07e | 795 | const struct route_gateway_info *rgi, |
3c7f2f55 JY |
796 | const struct env_set *es) |
797 | { | |
798 | int i; | |
799 | for (i = 0; i < rb->n_bypass; ++i) | |
800 | { | |
7fb0e07e | 801 | if (rb->bypass[i]) |
3c7f2f55 | 802 | add_route3 (rb->bypass[i], |
32e576d2 | 803 | IPV4_NETMASK_HOST, |
3c7f2f55 JY |
804 | gateway, |
805 | tt, | |
8fc83a2d | 806 | flags | ROUTE_REF_GW, |
7fb0e07e | 807 | rgi, |
3c7f2f55 JY |
808 | es); |
809 | } | |
810 | } | |
811 | ||
812 | static void | |
813 | del_bypass_routes (struct route_bypass *rb, | |
814 | in_addr_t gateway, | |
815 | const struct tuntap *tt, | |
816 | unsigned int flags, | |
7fb0e07e | 817 | const struct route_gateway_info *rgi, |
3c7f2f55 JY |
818 | const struct env_set *es) |
819 | { | |
820 | int i; | |
821 | for (i = 0; i < rb->n_bypass; ++i) | |
822 | { | |
7fb0e07e | 823 | if (rb->bypass[i]) |
3c7f2f55 | 824 | del_route3 (rb->bypass[i], |
32e576d2 | 825 | IPV4_NETMASK_HOST, |
3c7f2f55 JY |
826 | gateway, |
827 | tt, | |
8fc83a2d | 828 | flags | ROUTE_REF_GW, |
7fb0e07e | 829 | rgi, |
3c7f2f55 JY |
830 | es); |
831 | } | |
832 | } | |
833 | ||
6fbf66fa JY |
834 | static void |
835 | redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
836 | { | |
837 | const char err[] = "NOTE: unable to redirect default gateway --"; | |
838 | ||
f0257abb | 839 | if ( rl && rl->flags & RG_ENABLE ) |
6fbf66fa | 840 | { |
7fb0e07e | 841 | if (!(rl->spec.flags & RTSA_REMOTE_ENDPOINT)) |
6fbf66fa JY |
842 | { |
843 | msg (M_WARN, "%s VPN gateway parameter (--route-gateway or --ifconfig) is missing", err); | |
844 | } | |
7fb0e07e | 845 | else if (!(rl->rgi.flags & RGI_ADDR_DEFINED)) |
6fbf66fa JY |
846 | { |
847 | msg (M_WARN, "%s Cannot read current default gateway from system", err); | |
848 | } | |
7fb0e07e | 849 | else if (!(rl->spec.flags & RTSA_REMOTE_HOST)) |
6fbf66fa JY |
850 | { |
851 | msg (M_WARN, "%s Cannot obtain current remote host address", err); | |
852 | } | |
853 | else | |
854 | { | |
775a6ac2 JY |
855 | bool local = BOOL_CAST(rl->flags & RG_LOCAL); |
856 | if (rl->flags & RG_AUTO_LOCAL) { | |
7fb0e07e | 857 | const int tla = rl->spec.remote_host_local; |
775a6ac2 JY |
858 | if (tla == TLA_NONLOCAL) |
859 | { | |
860 | dmsg (D_ROUTE, "ROUTE remote_host is NOT LOCAL"); | |
861 | local = false; | |
862 | } | |
863 | else if (tla == TLA_LOCAL) | |
864 | { | |
865 | dmsg (D_ROUTE, "ROUTE remote_host is LOCAL"); | |
866 | local = true; | |
867 | } | |
868 | } | |
869 | if (!local) | |
870 | { | |
871 | /* route remote host to original default gateway */ | |
6caf7f3d JC |
872 | /* if remote_host is not ipv4 (ie: ipv6), just skip |
873 | * adding this special /32 route */ | |
9d4c64b5 | 874 | if (rl->spec.remote_host != IPV4_INVALID_ADDR) { |
efa85c8b | 875 | add_route3 (rl->spec.remote_host, |
32e576d2 | 876 | IPV4_NETMASK_HOST, |
576dc96c | 877 | rl->rgi.gateway.addr, |
efa85c8b | 878 | tt, |
8fc83a2d | 879 | flags | ROUTE_REF_GW, |
576dc96c | 880 | &rl->rgi, |
efa85c8b | 881 | es); |
576dc96c | 882 | rl->iflags |= RL_DID_LOCAL; |
efa85c8b JC |
883 | } else { |
884 | dmsg (D_ROUTE, "ROUTE remote_host protocol differs from tunneled"); | |
885 | } | |
775a6ac2 | 886 | } |
6fbf66fa | 887 | |
3c7f2f55 | 888 | /* route DHCP/DNS server traffic through original default gateway */ |
7fb0e07e | 889 | add_bypass_routes (&rl->spec.bypass, rl->rgi.gateway.addr, tt, flags, &rl->rgi, es); |
3c7f2f55 | 890 | |
b723833b JY |
891 | if (rl->flags & RG_REROUTE_GW) |
892 | { | |
893 | if (rl->flags & RG_DEF1) | |
894 | { | |
895 | /* add new default route (1st component) */ | |
896 | add_route3 (0x00000000, | |
897 | 0x80000000, | |
898 | rl->spec.remote_endpoint, | |
899 | tt, | |
900 | flags, | |
7fb0e07e | 901 | &rl->rgi, |
b723833b JY |
902 | es); |
903 | ||
904 | /* add new default route (2nd component) */ | |
905 | add_route3 (0x80000000, | |
906 | 0x80000000, | |
907 | rl->spec.remote_endpoint, | |
908 | tt, | |
909 | flags, | |
7fb0e07e | 910 | &rl->rgi, |
b723833b JY |
911 | es); |
912 | } | |
913 | else | |
914 | { | |
915 | /* delete default route */ | |
916 | del_route3 (0, | |
917 | 0, | |
7fb0e07e | 918 | rl->rgi.gateway.addr, |
b723833b | 919 | tt, |
8fc83a2d | 920 | flags | ROUTE_REF_GW, |
7fb0e07e | 921 | &rl->rgi, |
b723833b JY |
922 | es); |
923 | ||
924 | /* add new default route */ | |
925 | add_route3 (0, | |
926 | 0, | |
927 | rl->spec.remote_endpoint, | |
928 | tt, | |
929 | flags, | |
7fb0e07e | 930 | &rl->rgi, |
b723833b JY |
931 | es); |
932 | } | |
933 | } | |
934 | ||
935 | /* set a flag so we can undo later */ | |
7fb0e07e | 936 | rl->iflags |= RL_DID_REDIRECT_DEFAULT_GATEWAY; |
b723833b JY |
937 | } |
938 | } | |
939 | } | |
940 | ||
941 | static void | |
942 | undo_redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
943 | { | |
f0257abb | 944 | if ( rl && rl->iflags & RL_DID_REDIRECT_DEFAULT_GATEWAY ) |
b723833b JY |
945 | { |
946 | /* delete remote host route */ | |
7fb0e07e | 947 | if (rl->iflags & RL_DID_LOCAL) |
775a6ac2 JY |
948 | { |
949 | del_route3 (rl->spec.remote_host, | |
32e576d2 | 950 | IPV4_NETMASK_HOST, |
7fb0e07e | 951 | rl->rgi.gateway.addr, |
775a6ac2 | 952 | tt, |
8fc83a2d | 953 | flags | ROUTE_REF_GW, |
7fb0e07e | 954 | &rl->rgi, |
775a6ac2 | 955 | es); |
7fb0e07e | 956 | rl->iflags &= ~RL_DID_LOCAL; |
775a6ac2 | 957 | } |
b723833b JY |
958 | |
959 | /* delete special DHCP/DNS bypass route */ | |
7fb0e07e | 960 | del_bypass_routes (&rl->spec.bypass, rl->rgi.gateway.addr, tt, flags, &rl->rgi, es); |
b723833b JY |
961 | |
962 | if (rl->flags & RG_REROUTE_GW) | |
963 | { | |
3c7f2f55 | 964 | if (rl->flags & RG_DEF1) |
6fbf66fa | 965 | { |
b723833b JY |
966 | /* delete default route (1st component) */ |
967 | del_route3 (0x00000000, | |
6fbf66fa JY |
968 | 0x80000000, |
969 | rl->spec.remote_endpoint, | |
970 | tt, | |
971 | flags, | |
7fb0e07e | 972 | &rl->rgi, |
6fbf66fa JY |
973 | es); |
974 | ||
b723833b JY |
975 | /* delete default route (2nd component) */ |
976 | del_route3 (0x80000000, | |
6fbf66fa JY |
977 | 0x80000000, |
978 | rl->spec.remote_endpoint, | |
979 | tt, | |
980 | flags, | |
7fb0e07e | 981 | &rl->rgi, |
6fbf66fa JY |
982 | es); |
983 | } | |
984 | else | |
985 | { | |
986 | /* delete default route */ | |
987 | del_route3 (0, | |
988 | 0, | |
b723833b | 989 | rl->spec.remote_endpoint, |
6fbf66fa JY |
990 | tt, |
991 | flags, | |
7fb0e07e | 992 | &rl->rgi, |
6fbf66fa JY |
993 | es); |
994 | ||
b723833b | 995 | /* restore original default route */ |
6fbf66fa JY |
996 | add_route3 (0, |
997 | 0, | |
7fb0e07e | 998 | rl->rgi.gateway.addr, |
6fbf66fa | 999 | tt, |
8fc83a2d | 1000 | flags | ROUTE_REF_GW, |
7fb0e07e | 1001 | &rl->rgi, |
6fbf66fa JY |
1002 | es); |
1003 | } | |
6fbf66fa JY |
1004 | } |
1005 | ||
7fb0e07e | 1006 | rl->iflags &= ~RL_DID_REDIRECT_DEFAULT_GATEWAY; |
6fbf66fa JY |
1007 | } |
1008 | } | |
1009 | ||
1010 | void | |
576dc96c | 1011 | add_routes (struct route_list *rl, struct route_ipv6_list *rl6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) |
6fbf66fa | 1012 | { |
d02a86d3 | 1013 | redirect_default_route_to_vpn (rl, tt, flags, es); |
f0257abb | 1014 | if ( rl && !(rl->iflags & RL_ROUTES_ADDED) ) |
6fbf66fa JY |
1015 | { |
1016 | int i; | |
1017 | ||
1018 | #ifdef ENABLE_MANAGEMENT | |
1019 | if (management && rl->n) | |
1020 | { | |
1021 | management_set_state (management, | |
1022 | OPENVPN_STATE_ADD_ROUTES, | |
1023 | NULL, | |
5ad84585 | 1024 | 0, |
6fbf66fa JY |
1025 | 0); |
1026 | } | |
1027 | #endif | |
1028 | ||
1029 | for (i = 0; i < rl->n; ++i) | |
1030 | { | |
b57e005b | 1031 | struct route_ipv4 *r = &rl->routes[i]; |
f77c60d3 | 1032 | check_subnet_conflict (r->network, r->netmask, "route"); |
6fbf66fa | 1033 | if (flags & ROUTE_DELETE_FIRST) |
7fb0e07e JY |
1034 | delete_route (r, tt, flags, &rl->rgi, es); |
1035 | add_route (r, tt, flags, &rl->rgi, es); | |
6fbf66fa | 1036 | } |
7fb0e07e | 1037 | rl->iflags |= RL_ROUTES_ADDED; |
6fbf66fa | 1038 | } |
512cda46 GD |
1039 | if (rl6 && !rl6->routes_added) |
1040 | { | |
1041 | int i; | |
1042 | ||
1043 | for (i = 0; i < rl6->n; ++i) | |
1044 | { | |
1045 | struct route_ipv6 *r = &rl6->routes_ipv6[i]; | |
1046 | if (flags & ROUTE_DELETE_FIRST) | |
1047 | delete_route_ipv6 (r, tt, flags, es); | |
1048 | add_route_ipv6 (r, tt, flags, es); | |
1049 | } | |
1050 | rl6->routes_added = true; | |
1051 | } | |
6fbf66fa JY |
1052 | } |
1053 | ||
1054 | void | |
512cda46 GD |
1055 | delete_routes (struct route_list *rl, struct route_ipv6_list *rl6, |
1056 | const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
6fbf66fa | 1057 | { |
f0257abb | 1058 | if ( rl && rl->iflags & RL_ROUTES_ADDED ) |
6fbf66fa JY |
1059 | { |
1060 | int i; | |
1061 | for (i = rl->n - 1; i >= 0; --i) | |
1062 | { | |
b57e005b | 1063 | struct route_ipv4 * r = &rl->routes[i]; |
7fb0e07e | 1064 | delete_route (r, tt, flags, &rl->rgi, es); |
6fbf66fa | 1065 | } |
7fb0e07e | 1066 | rl->iflags &= ~RL_ROUTES_ADDED; |
6fbf66fa | 1067 | } |
6fbf66fa | 1068 | |
576dc96c | 1069 | undo_redirect_default_route_to_vpn (rl, tt, flags, es); |
f0257abb GD |
1070 | |
1071 | if ( rl ) | |
1072 | { | |
1073 | clear_route_list (rl); | |
1074 | } | |
512cda46 GD |
1075 | |
1076 | if ( rl6 && rl6->routes_added ) | |
1077 | { | |
1078 | int i; | |
1079 | for (i = rl6->n - 1; i >= 0; --i) | |
1080 | { | |
1081 | const struct route_ipv6 *r6 = &rl6->routes_ipv6[i]; | |
1082 | delete_route_ipv6 (r6, tt, flags, es); | |
1083 | } | |
1084 | rl6->routes_added = false; | |
1085 | } | |
1086 | ||
1087 | if ( rl6 ) | |
1088 | { | |
1089 | clear_route_ipv6_list (rl6); | |
1090 | } | |
6fbf66fa JY |
1091 | } |
1092 | ||
6c61d0dd | 1093 | #ifndef ENABLE_SMALL |
6fbf66fa JY |
1094 | |
1095 | static const char * | |
1096 | show_opt (const char *option) | |
1097 | { | |
1098 | if (!option) | |
1099 | return "nil"; | |
1100 | else | |
1101 | return option; | |
1102 | } | |
1103 | ||
1104 | static void | |
1105 | print_route_option (const struct route_option *ro, int level) | |
1106 | { | |
1107 | msg (level, " route %s/%s/%s/%s", | |
1108 | show_opt (ro->network), | |
1109 | show_opt (ro->netmask), | |
1110 | show_opt (ro->gateway), | |
1111 | show_opt (ro->metric)); | |
1112 | } | |
1113 | ||
1114 | void | |
1115 | print_route_options (const struct route_option_list *rol, | |
1116 | int level) | |
1117 | { | |
1118 | int i; | |
3c7f2f55 | 1119 | if (rol->flags & RG_ENABLE) |
6fbf66fa | 1120 | msg (level, " [redirect_default_gateway local=%d]", |
3c7f2f55 | 1121 | (rol->flags & RG_LOCAL) != 0); |
6fbf66fa JY |
1122 | for (i = 0; i < rol->n; ++i) |
1123 | print_route_option (&rol->routes[i], level); | |
1124 | } | |
1125 | ||
7fb0e07e JY |
1126 | void |
1127 | print_default_gateway(const int msglevel, const struct route_gateway_info *rgi) | |
1128 | { | |
1129 | struct gc_arena gc = gc_new (); | |
1130 | if (rgi->flags & RGI_ADDR_DEFINED) | |
1131 | { | |
1132 | struct buffer out = alloc_buf_gc (256, &gc); | |
1133 | buf_printf (&out, "ROUTE_GATEWAY"); | |
8fc83a2d JY |
1134 | if (rgi->flags & RGI_ON_LINK) |
1135 | buf_printf (&out, " ON_LINK"); | |
1136 | else | |
1137 | buf_printf (&out, " %s", print_in_addr_t (rgi->gateway.addr, 0, &gc)); | |
7fb0e07e JY |
1138 | if (rgi->flags & RGI_NETMASK_DEFINED) |
1139 | buf_printf (&out, "/%s", print_in_addr_t (rgi->gateway.netmask, 0, &gc)); | |
1140 | #ifdef WIN32 | |
1141 | if (rgi->flags & RGI_IFACE_DEFINED) | |
1142 | buf_printf (&out, " I=%u", (unsigned int)rgi->adapter_index); | |
1143 | #else | |
1144 | if (rgi->flags & RGI_IFACE_DEFINED) | |
1145 | buf_printf (&out, " IFACE=%s", rgi->iface); | |
1146 | #endif | |
1147 | if (rgi->flags & RGI_HWADDR_DEFINED) | |
1148 | buf_printf (&out, " HWADDR=%s", format_hex_ex (rgi->hwaddr, 6, 0, 1, ":", &gc)); | |
1149 | msg (msglevel, "%s", BSTR (&out)); | |
1150 | } | |
1151 | gc_free (&gc); | |
1152 | } | |
1153 | ||
6fbf66fa JY |
1154 | #endif |
1155 | ||
1156 | static void | |
b57e005b | 1157 | print_route (const struct route_ipv4 *r, int level) |
6fbf66fa JY |
1158 | { |
1159 | struct gc_arena gc = gc_new (); | |
7fb0e07e | 1160 | if (r->flags & RT_DEFINED) |
6fbf66fa JY |
1161 | msg (level, "%s", route_string (r, &gc)); |
1162 | gc_free (&gc); | |
1163 | } | |
1164 | ||
1165 | void | |
1166 | print_routes (const struct route_list *rl, int level) | |
1167 | { | |
1168 | int i; | |
1169 | for (i = 0; i < rl->n; ++i) | |
1170 | print_route (&rl->routes[i], level); | |
1171 | } | |
1172 | ||
1173 | static void | |
b57e005b | 1174 | setenv_route (struct env_set *es, const struct route_ipv4 *r, int i) |
6fbf66fa JY |
1175 | { |
1176 | struct gc_arena gc = gc_new (); | |
7fb0e07e | 1177 | if (r->flags & RT_DEFINED) |
6fbf66fa JY |
1178 | { |
1179 | setenv_route_addr (es, "network", r->network, i); | |
1180 | setenv_route_addr (es, "netmask", r->netmask, i); | |
1181 | setenv_route_addr (es, "gateway", r->gateway, i); | |
1182 | ||
7fb0e07e | 1183 | if (r->flags & RT_METRIC_DEFINED) |
6fbf66fa JY |
1184 | { |
1185 | struct buffer name = alloc_buf_gc (256, &gc); | |
1186 | buf_printf (&name, "route_metric_%d", i); | |
1187 | setenv_int (es, BSTR (&name), r->metric); | |
1188 | } | |
1189 | } | |
1190 | gc_free (&gc); | |
1191 | } | |
1192 | ||
1193 | void | |
1194 | setenv_routes (struct env_set *es, const struct route_list *rl) | |
1195 | { | |
1196 | int i; | |
1197 | for (i = 0; i < rl->n; ++i) | |
1198 | setenv_route (es, &rl->routes[i], i + 1); | |
1199 | } | |
1200 | ||
512cda46 GD |
1201 | static void |
1202 | setenv_route_ipv6 (struct env_set *es, const struct route_ipv6 *r6, int i) | |
1203 | { | |
1204 | struct gc_arena gc = gc_new (); | |
1205 | if (r6->defined) | |
1206 | { | |
1207 | struct buffer name1 = alloc_buf_gc( 256, &gc ); | |
1208 | struct buffer val = alloc_buf_gc( 256, &gc ); | |
1209 | struct buffer name2 = alloc_buf_gc( 256, &gc ); | |
1210 | ||
1211 | buf_printf( &name1, "route_ipv6_network_%d", i ); | |
1212 | buf_printf( &val, "%s/%d", print_in6_addr( r6->network, 0, &gc ), | |
1213 | r6->netbits ); | |
1214 | setenv_str( es, BSTR(&name1), BSTR(&val) ); | |
1215 | ||
1216 | buf_printf( &name2, "route_ipv6_gateway_%d", i ); | |
1217 | setenv_str( es, BSTR(&name2), print_in6_addr( r6->gateway, 0, &gc )); | |
1218 | } | |
1219 | gc_free (&gc); | |
1220 | } | |
1221 | void | |
1222 | setenv_routes_ipv6 (struct env_set *es, const struct route_ipv6_list *rl6) | |
1223 | { | |
1224 | int i; | |
1225 | for (i = 0; i < rl6->n; ++i) | |
1226 | setenv_route_ipv6 (es, &rl6->routes_ipv6[i], i + 1); | |
1227 | } | |
1228 | ||
7fb0e07e JY |
1229 | /* |
1230 | * local_route() determines whether the gateway of a provided host | |
1231 | * route is on the same interface that owns the default gateway. | |
1232 | * It uses the data structure | |
1233 | * returned by get_default_gateway() (struct route_gateway_info) | |
1234 | * to determine this. If the route is local, LR_MATCH is returned. | |
1235 | * When adding routes into the kernel, if LR_MATCH is defined for | |
1236 | * a given route, the route should explicitly reference the default | |
1237 | * gateway interface as the route destination. For example, here | |
1238 | * is an example on Linux that uses LR_MATCH: | |
1239 | * | |
576dc96c | 1240 | * route add -net 10.10.0.1 netmask 255.255.255.255 dev eth0 |
7fb0e07e JY |
1241 | * |
1242 | * This capability is needed by the "default-gateway block-local" | |
1243 | * directive, to allow client access to the local subnet to be | |
1244 | * blocked but still allow access to the local default gateway. | |
1245 | */ | |
1246 | ||
1247 | /* local_route() return values */ | |
1248 | #define LR_NOMATCH 0 /* route is not local */ | |
1249 | #define LR_MATCH 1 /* route is local */ | |
1250 | #define LR_ERROR 2 /* caller should abort adding route */ | |
1251 | ||
1252 | static int | |
1253 | local_route (in_addr_t network, | |
1254 | in_addr_t netmask, | |
1255 | in_addr_t gateway, | |
1256 | const struct route_gateway_info *rgi) | |
1257 | { | |
1258 | /* set LR_MATCH on local host routes */ | |
1259 | const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED|RGI_IFACE_DEFINED); | |
1260 | if (rgi | |
1261 | && (rgi->flags & rgi_needed) == rgi_needed | |
1262 | && gateway == rgi->gateway.addr | |
1263 | && netmask == 0xFFFFFFFF) | |
1264 | { | |
1265 | if (((network ^ rgi->gateway.addr) & rgi->gateway.netmask) == 0) | |
1266 | return LR_MATCH; | |
1267 | else | |
1268 | { | |
1269 | /* examine additional subnets on gateway interface */ | |
1270 | size_t i; | |
1271 | for (i = 0; i < rgi->n_addrs; ++i) | |
1272 | { | |
1273 | const struct route_gateway_address *gwa = &rgi->addrs[i]; | |
1274 | if (((network ^ gwa->addr) & gwa->netmask) == 0) | |
1275 | return LR_MATCH; | |
1276 | } | |
1277 | } | |
1278 | } | |
1279 | return LR_NOMATCH; | |
1280 | } | |
1281 | ||
8fc83a2d JY |
1282 | /* Return true if the "on-link" form of the route should be used. This is when the gateway for a |
1283 | a route is specified as an interface rather than an address. */ | |
1284 | static inline bool | |
1285 | is_on_link (const int is_local_route, const unsigned int flags, const struct route_gateway_info *rgi) | |
1286 | { | |
1287 | return rgi && (is_local_route == LR_MATCH || ((flags & ROUTE_REF_GW) && (rgi->flags & RGI_ON_LINK))); | |
1288 | } | |
1289 | ||
6d5d1010 | 1290 | void |
b57e005b | 1291 | add_route (struct route_ipv4 *r, |
7fb0e07e JY |
1292 | const struct tuntap *tt, |
1293 | unsigned int flags, | |
1294 | const struct route_gateway_info *rgi, /* may be NULL */ | |
1295 | const struct env_set *es) | |
6fbf66fa JY |
1296 | { |
1297 | struct gc_arena gc; | |
5a2e9a25 | 1298 | struct argv argv; |
6fbf66fa JY |
1299 | const char *network; |
1300 | const char *netmask; | |
1301 | const char *gateway; | |
1302 | bool status = false; | |
7fb0e07e | 1303 | int is_local_route; |
6fbf66fa | 1304 | |
7fb0e07e | 1305 | if (!(r->flags & RT_DEFINED)) |
6fbf66fa JY |
1306 | return; |
1307 | ||
1308 | gc_init (&gc); | |
5a2e9a25 | 1309 | argv_init (&argv); |
6fbf66fa JY |
1310 | |
1311 | network = print_in_addr_t (r->network, 0, &gc); | |
1312 | netmask = print_in_addr_t (r->netmask, 0, &gc); | |
1313 | gateway = print_in_addr_t (r->gateway, 0, &gc); | |
1314 | ||
7fb0e07e JY |
1315 | is_local_route = local_route(r->network, r->netmask, r->gateway, rgi); |
1316 | if (is_local_route == LR_ERROR) | |
1317 | goto done; | |
6fbf66fa JY |
1318 | |
1319 | #if defined(TARGET_LINUX) | |
51bd56f4 ABL |
1320 | #ifdef ENABLE_IPROUTE |
1321 | /* FIXME -- add on-link support for ENABLE_IPROUTE */ | |
5a2e9a25 | 1322 | argv_printf (&argv, "%s route add %s/%d via %s", |
0aee9ca7 | 1323 | iproute_path, |
6fbf66fa JY |
1324 | network, |
1325 | count_netmask_bits(netmask), | |
1326 | gateway); | |
7fb0e07e | 1327 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1328 | argv_printf_cat (&argv, "metric %d", r->metric); |
6fbf66fa JY |
1329 | |
1330 | #else | |
7fb0e07e JY |
1331 | argv_printf (&argv, "%s add -net %s netmask %s", |
1332 | ROUTE_PATH, | |
1333 | network, | |
1334 | netmask); | |
1335 | if (r->flags & RT_METRIC_DEFINED) | |
5a2e9a25 | 1336 | argv_printf_cat (&argv, "metric %d", r->metric); |
8fc83a2d | 1337 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e JY |
1338 | argv_printf_cat (&argv, "dev %s", rgi->iface); |
1339 | else | |
1340 | argv_printf_cat (&argv, "gw %s", gateway); | |
1341 | ||
51bd56f4 | 1342 | #endif /*ENABLE_IPROUTE*/ |
5a2e9a25 JY |
1343 | argv_msg (D_ROUTE, &argv); |
1344 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route add command failed"); | |
6fbf66fa | 1345 | |
a55b3cdb AS |
1346 | #elif defined (TARGET_ANDROID) |
1347 | struct buffer out = alloc_buf_gc (64, &gc); | |
1348 | ||
1349 | buf_printf (&out, "%s %s", network, netmask); | |
1350 | management_android_control (management, "ROUTE", buf_bptr(&out)); | |
1351 | ||
6fbf66fa | 1352 | #elif defined (WIN32) |
7fb0e07e | 1353 | { |
12e46092 | 1354 | DWORD ai = TUN_ADAPTER_INDEX_INVALID; |
7fb0e07e JY |
1355 | argv_printf (&argv, "%s%sc ADD %s MASK %s %s", |
1356 | get_win_sys_path(), | |
1357 | WIN_ROUTE_PATH_SUFFIX, | |
1358 | network, | |
1359 | netmask, | |
1360 | gateway); | |
1361 | if (r->flags & RT_METRIC_DEFINED) | |
1362 | argv_printf_cat (&argv, "METRIC %d", r->metric); | |
8fc83a2d | 1363 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e JY |
1364 | { |
1365 | ai = rgi->adapter_index; | |
1366 | argv_printf_cat (&argv, "IF %u", (unsigned int)ai); | |
1367 | } | |
6fbf66fa | 1368 | |
7fb0e07e | 1369 | argv_msg (D_ROUTE, &argv); |
6fbf66fa | 1370 | |
7fb0e07e JY |
1371 | if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI) |
1372 | { | |
1373 | status = add_route_ipapi (r, tt, ai); | |
1374 | msg (D_ROUTE, "Route addition via IPAPI %s", status ? "succeeded" : "failed"); | |
1375 | } | |
1376 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE) | |
1377 | { | |
1378 | netcmd_semaphore_lock (); | |
1379 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed"); | |
1380 | netcmd_semaphore_release (); | |
1381 | } | |
1382 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE) | |
1383 | { | |
1384 | status = add_route_ipapi (r, tt, ai); | |
1385 | msg (D_ROUTE, "Route addition via IPAPI %s [adaptive]", status ? "succeeded" : "failed"); | |
1386 | if (!status) | |
1387 | { | |
1388 | msg (D_ROUTE, "Route addition fallback to route.exe"); | |
1389 | netcmd_semaphore_lock (); | |
1390 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed [adaptive]"); | |
1391 | netcmd_semaphore_release (); | |
1392 | } | |
1393 | } | |
1394 | else | |
1395 | { | |
1396 | ASSERT (0); | |
1397 | } | |
1398 | } | |
6fbf66fa JY |
1399 | |
1400 | #elif defined (TARGET_SOLARIS) | |
1401 | ||
1402 | /* example: route add 192.0.2.32 -netmask 255.255.255.224 somegateway */ | |
1403 | ||
5a2e9a25 JY |
1404 | argv_printf (&argv, "%s add", |
1405 | ROUTE_PATH); | |
6fbf66fa | 1406 | |
5a2e9a25 | 1407 | argv_printf_cat (&argv, "%s -netmask %s %s", |
6fbf66fa JY |
1408 | network, |
1409 | netmask, | |
1410 | gateway); | |
1411 | ||
792e8956 GD |
1412 | /* Solaris can only distinguish between "metric 0" == "on-link on the |
1413 | * interface where the IP address given is configured" and "metric > 0" | |
1414 | * == "use gateway specified" (no finer-grained route metrics available) | |
1415 | * | |
1416 | * More recent versions of Solaris can also do "-interface", but that | |
1417 | * would break backwards compatibility with older versions for no gain. | |
1418 | */ | |
1419 | if (r->flags & RT_METRIC_DEFINED ) | |
1420 | argv_printf_cat (&argv, "%d", r->metric); | |
f0eac1a5 | 1421 | |
5a2e9a25 JY |
1422 | argv_msg (D_ROUTE, &argv); |
1423 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add command failed"); | |
6fbf66fa JY |
1424 | |
1425 | #elif defined(TARGET_FREEBSD) | |
1426 | ||
5a2e9a25 JY |
1427 | argv_printf (&argv, "%s add", |
1428 | ROUTE_PATH); | |
6fbf66fa JY |
1429 | |
1430 | #if 0 | |
7fb0e07e | 1431 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1432 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
6fbf66fa JY |
1433 | #endif |
1434 | ||
5a2e9a25 | 1435 | argv_printf_cat (&argv, "-net %s %s %s", |
6fbf66fa JY |
1436 | network, |
1437 | gateway, | |
1438 | netmask); | |
1439 | ||
8fc83a2d | 1440 | /* FIXME -- add on-link support for FreeBSD */ |
7fb0e07e | 1441 | |
5a2e9a25 JY |
1442 | argv_msg (D_ROUTE, &argv); |
1443 | status = openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route add command failed"); | |
6fbf66fa | 1444 | |
1bda73a7 JY |
1445 | #elif defined(TARGET_DRAGONFLY) |
1446 | ||
5a2e9a25 JY |
1447 | argv_printf (&argv, "%s add", |
1448 | ROUTE_PATH); | |
1bda73a7 JY |
1449 | |
1450 | #if 0 | |
7fb0e07e | 1451 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1452 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
1bda73a7 JY |
1453 | #endif |
1454 | ||
5a2e9a25 | 1455 | argv_printf_cat (&argv, "-net %s %s %s", |
1bda73a7 JY |
1456 | network, |
1457 | gateway, | |
1458 | netmask); | |
1459 | ||
8fc83a2d | 1460 | /* FIXME -- add on-link support for Dragonfly */ |
7fb0e07e | 1461 | |
5a2e9a25 JY |
1462 | argv_msg (D_ROUTE, &argv); |
1463 | status = openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route add command failed"); | |
1bda73a7 | 1464 | |
6fbf66fa JY |
1465 | #elif defined(TARGET_DARWIN) |
1466 | ||
5a2e9a25 JY |
1467 | argv_printf (&argv, "%s add", |
1468 | ROUTE_PATH); | |
6fbf66fa JY |
1469 | |
1470 | #if 0 | |
7fb0e07e | 1471 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1472 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
6fbf66fa JY |
1473 | #endif |
1474 | ||
8fc83a2d | 1475 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e | 1476 | { |
8fc83a2d | 1477 | /* Mac OS X route syntax for ON_LINK: |
7fb0e07e JY |
1478 | route add -cloning -net 10.10.0.1 -netmask 255.255.255.255 -interface en0 */ |
1479 | argv_printf_cat (&argv, "-cloning -net %s -netmask %s -interface %s", | |
1480 | network, | |
1481 | netmask, | |
1482 | rgi->iface); | |
1483 | } | |
1484 | else | |
1485 | { | |
1486 | argv_printf_cat (&argv, "-net %s %s %s", | |
1487 | network, | |
1488 | gateway, | |
1489 | netmask); | |
1490 | } | |
6fbf66fa | 1491 | |
5a2e9a25 JY |
1492 | argv_msg (D_ROUTE, &argv); |
1493 | status = openvpn_execve_check (&argv, es, 0, "ERROR: OS X route add command failed"); | |
6fbf66fa JY |
1494 | |
1495 | #elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) | |
1496 | ||
5a2e9a25 JY |
1497 | argv_printf (&argv, "%s add", |
1498 | ROUTE_PATH); | |
6fbf66fa JY |
1499 | |
1500 | #if 0 | |
7fb0e07e | 1501 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1502 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
6fbf66fa JY |
1503 | #endif |
1504 | ||
5a2e9a25 | 1505 | argv_printf_cat (&argv, "-net %s %s -netmask %s", |
6fbf66fa JY |
1506 | network, |
1507 | gateway, | |
1508 | netmask); | |
1509 | ||
8fc83a2d | 1510 | /* FIXME -- add on-link support for OpenBSD/NetBSD */ |
7fb0e07e | 1511 | |
5a2e9a25 JY |
1512 | argv_msg (D_ROUTE, &argv); |
1513 | status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route add command failed"); | |
6fbf66fa JY |
1514 | |
1515 | #else | |
1516 | 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"); | |
1517 | #endif | |
1518 | ||
1519 | done: | |
7fb0e07e JY |
1520 | if (status) |
1521 | r->flags |= RT_ADDED; | |
1522 | else | |
1523 | r->flags &= ~RT_ADDED; | |
5a2e9a25 | 1524 | argv_reset (&argv); |
6fbf66fa JY |
1525 | gc_free (&gc); |
1526 | } | |
1527 | ||
b55e49bd GD |
1528 | |
1529 | static const char * | |
1530 | print_in6_addr_netbits_only( struct in6_addr network_copy, int netbits, | |
1531 | struct gc_arena * gc) | |
1532 | { | |
1533 | /* clear host bit parts of route | |
1534 | * (needed if routes are specified improperly, or if we need to | |
1535 | * explicitely setup/clear the "connected" network routes on some OSes) | |
1536 | */ | |
1537 | int byte = 15; | |
1538 | int bits_to_clear = 128 - netbits; | |
1539 | ||
1540 | while( byte >= 0 && bits_to_clear > 0 ) | |
1541 | { | |
1542 | if ( bits_to_clear >= 8 ) | |
1543 | { network_copy.s6_addr[byte--] = 0; bits_to_clear -= 8; } | |
1544 | else | |
ffa1184d | 1545 | { network_copy.s6_addr[byte--] &= (0xff << bits_to_clear); bits_to_clear = 0; } |
b55e49bd GD |
1546 | } |
1547 | ||
1548 | return print_in6_addr( network_copy, 0, gc); | |
1549 | } | |
1550 | ||
512cda46 GD |
1551 | void |
1552 | add_route_ipv6 (struct route_ipv6 *r6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
1553 | { | |
1554 | struct gc_arena gc; | |
1555 | struct argv argv; | |
1556 | ||
1557 | const char *network; | |
1558 | const char *gateway; | |
1559 | bool status = false; | |
1560 | const char *device = tt->actual_name; | |
512cda46 | 1561 | |
ff9c39b6 GD |
1562 | bool gateway_needed = false; |
1563 | ||
512cda46 GD |
1564 | if (!r6->defined) |
1565 | return; | |
1566 | ||
1567 | gc_init (&gc); | |
1568 | argv_init (&argv); | |
1569 | ||
b55e49bd | 1570 | network = print_in6_addr_netbits_only( r6->network, r6->netbits, &gc); |
512cda46 GD |
1571 | gateway = print_in6_addr( r6->gateway, 0, &gc); |
1572 | ||
1840c852 GD |
1573 | if ( !tt->ipv6 ) |
1574 | { | |
1575 | msg( M_INFO, "add_route_ipv6(): not adding %s/%d, no IPv6 on if %s", | |
1576 | network, r6->netbits, device ); | |
1577 | return; | |
1578 | } | |
1579 | ||
512cda46 GD |
1580 | msg( M_INFO, "add_route_ipv6(%s/%d -> %s metric %d) dev %s", |
1581 | network, r6->netbits, gateway, r6->metric, device ); | |
1582 | ||
1583 | /* | |
1584 | * Filter out routes which are essentially no-ops | |
1585 | * (not currently done for IPv6) | |
1586 | */ | |
1587 | ||
ff9c39b6 GD |
1588 | /* On "tun" interface, we never set a gateway if the operating system |
1589 | * can do "route to interface" - it does not add value, as the target | |
1590 | * dev already fully qualifies the route destination on point-to-point | |
1591 | * interfaces. OTOH, on "tap" interface, we must always set the | |
1592 | * gateway unless the route is to be an on-link network | |
1593 | */ | |
1594 | if ( tt->type == DEV_TYPE_TAP && | |
1595 | !(r6->metric_defined && r6->metric == 0 ) ) | |
1596 | { | |
1597 | gateway_needed = true; | |
1598 | } | |
1599 | ||
512cda46 | 1600 | #if defined(TARGET_LINUX) |
51bd56f4 | 1601 | #ifdef ENABLE_IPROUTE |
512cda46 GD |
1602 | argv_printf (&argv, "%s -6 route add %s/%d dev %s", |
1603 | iproute_path, | |
1604 | network, | |
1605 | r6->netbits, | |
1606 | device); | |
ff9c39b6 GD |
1607 | if (gateway_needed) |
1608 | argv_printf_cat (&argv, "via %s", gateway); | |
c37d9135 | 1609 | if (r6->metric_defined && r6->metric > 0 ) |
512cda46 GD |
1610 | argv_printf_cat (&argv, " metric %d", r6->metric); |
1611 | ||
1612 | #else | |
1613 | argv_printf (&argv, "%s -A inet6 add %s/%d dev %s", | |
1614 | ROUTE_PATH, | |
1615 | network, | |
1616 | r6->netbits, | |
1617 | device); | |
ff9c39b6 GD |
1618 | if (gateway_needed) |
1619 | argv_printf_cat (&argv, "gw %s", gateway); | |
c37d9135 | 1620 | if (r6->metric_defined && r6->metric > 0 ) |
512cda46 | 1621 | argv_printf_cat (&argv, " metric %d", r6->metric); |
51bd56f4 | 1622 | #endif /*ENABLE_IPROUTE*/ |
512cda46 GD |
1623 | argv_msg (D_ROUTE, &argv); |
1624 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route -6/-A inet6 add command failed"); | |
1625 | ||
a55b3cdb AS |
1626 | #elif defined (TARGET_ANDROID) |
1627 | struct buffer out = alloc_buf_gc (64, &gc); | |
1628 | ||
1629 | buf_printf (&out, "%s/%d", network, r6->netbits); | |
1630 | ||
1631 | management_android_control (management, "ROUTE6", buf_bptr(&out)); | |
1632 | ||
512cda46 GD |
1633 | #elif defined (WIN32) |
1634 | ||
6607def8 GD |
1635 | /* netsh interface ipv6 add route 2001:db8::/32 MyTunDevice */ |
1636 | argv_printf (&argv, "%s%sc interface ipv6 add route %s/%d %s", | |
1637 | get_win_sys_path(), | |
1638 | NETSH_PATH_SUFFIX, | |
1639 | network, | |
1640 | r6->netbits, | |
1641 | device); | |
1642 | ||
a9557fcb GD |
1643 | /* next-hop depends on TUN or TAP mode: |
1644 | * - in TAP mode, we use the "real" next-hop | |
1645 | * - in TUN mode we use a special-case link-local address that the tapdrvr | |
1646 | * knows about and will answer ND (neighbor discovery) packets for | |
1647 | */ | |
1648 | if ( tt->type == DEV_TYPE_TUN ) | |
1649 | argv_printf_cat( &argv, " %s", "fe80::8" ); | |
1650 | else | |
1651 | argv_printf_cat( &argv, " %s", gateway ); | |
1652 | ||
6607def8 GD |
1653 | #if 0 |
1654 | if (r->metric_defined) | |
a9557fcb | 1655 | argv_printf_cat (&argv, " METRIC %d", r->metric); |
6607def8 GD |
1656 | #endif |
1657 | ||
b55e49bd GD |
1658 | /* in some versions of Windows, routes are persistent across reboots by |
1659 | * default, unless "store=active" is set (pointed out by Tony Lim, thanks) | |
1660 | */ | |
1661 | argv_printf_cat( &argv, " store=active" ); | |
1662 | ||
6607def8 GD |
1663 | argv_msg (D_ROUTE, &argv); |
1664 | ||
1665 | netcmd_semaphore_lock (); | |
1666 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add ipv6 command failed"); | |
1667 | netcmd_semaphore_release (); | |
512cda46 GD |
1668 | |
1669 | #elif defined (TARGET_SOLARIS) | |
1670 | ||
1671 | /* example: route add -inet6 2001:db8::/32 somegateway 0 */ | |
1672 | ||
1673 | /* for some weird reason, this does not work for me unless I set | |
1674 | * "metric 0" - otherwise, the routes will be nicely installed, but | |
1675 | * packets will just disappear somewhere. So we use "0" now... | |
1676 | */ | |
1677 | ||
1678 | argv_printf (&argv, "%s add -inet6 %s/%d %s 0", | |
1679 | ROUTE_PATH, | |
1680 | network, | |
1681 | r6->netbits, | |
1682 | gateway ); | |
1683 | ||
1684 | argv_msg (D_ROUTE, &argv); | |
1685 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add -inet6 command failed"); | |
1686 | ||
1687 | #elif defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) | |
1688 | ||
ff9c39b6 | 1689 | argv_printf (&argv, "%s add -inet6 %s/%d", |
512cda46 GD |
1690 | ROUTE_PATH, |
1691 | network, | |
ff9c39b6 GD |
1692 | r6->netbits); |
1693 | ||
1694 | if (gateway_needed) | |
1695 | argv_printf_cat (&argv, "%s", gateway); | |
1696 | else | |
1697 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
1698 | |
1699 | argv_msg (D_ROUTE, &argv); | |
1700 | status = openvpn_execve_check (&argv, es, 0, "ERROR: *BSD route add -inet6 command failed"); | |
1701 | ||
1702 | #elif defined(TARGET_DARWIN) | |
1703 | ||
ff9c39b6 | 1704 | argv_printf (&argv, "%s add -inet6 %s -prefixlen %d", |
512cda46 | 1705 | ROUTE_PATH, |
ff9c39b6 GD |
1706 | network, r6->netbits ); |
1707 | ||
1708 | if (gateway_needed) | |
1709 | argv_printf_cat (&argv, "%s", gateway); | |
1710 | else | |
1711 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
1712 | |
1713 | argv_msg (D_ROUTE, &argv); | |
1714 | status = openvpn_execve_check (&argv, es, 0, "ERROR: MacOS X route add -inet6 command failed"); | |
1715 | ||
ada9769e | 1716 | #elif defined(TARGET_OPENBSD) |
512cda46 | 1717 | |
ada9769e GD |
1718 | argv_printf (&argv, "%s add -inet6 %s -prefixlen %d %s", |
1719 | ROUTE_PATH, | |
1720 | network, r6->netbits, gateway ); | |
1721 | ||
1722 | argv_msg (D_ROUTE, &argv); | |
1723 | status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD route add -inet6 command failed"); | |
1724 | ||
1725 | #elif defined(TARGET_NETBSD) | |
512cda46 GD |
1726 | |
1727 | argv_printf (&argv, "%s add -inet6 %s/%d %s", | |
1728 | ROUTE_PATH, | |
1729 | network, r6->netbits, gateway ); | |
1730 | ||
1731 | argv_msg (D_ROUTE, &argv); | |
ada9769e | 1732 | status = openvpn_execve_check (&argv, es, 0, "ERROR: NetBSD route add -inet6 command failed"); |
512cda46 GD |
1733 | |
1734 | #else | |
1735 | msg (M_FATAL, "Sorry, but I don't know how to do 'route ipv6' commands on this operating system. Try putting your routes in a --route-up script"); | |
1736 | #endif | |
1737 | ||
1738 | r6->defined = status; | |
1739 | argv_reset (&argv); | |
1740 | gc_free (&gc); | |
1741 | } | |
1742 | ||
6fbf66fa | 1743 | static void |
b57e005b | 1744 | delete_route (struct route_ipv4 *r, |
7fb0e07e JY |
1745 | const struct tuntap *tt, |
1746 | unsigned int flags, | |
1747 | const struct route_gateway_info *rgi, | |
1748 | const struct env_set *es) | |
6fbf66fa JY |
1749 | { |
1750 | struct gc_arena gc; | |
5a2e9a25 | 1751 | struct argv argv; |
6fbf66fa JY |
1752 | const char *network; |
1753 | const char *netmask; | |
1754 | const char *gateway; | |
7fb0e07e | 1755 | int is_local_route; |
6fbf66fa | 1756 | |
7fb0e07e | 1757 | if ((r->flags & (RT_DEFINED|RT_ADDED)) != (RT_DEFINED|RT_ADDED)) |
6fbf66fa JY |
1758 | return; |
1759 | ||
1760 | gc_init (&gc); | |
5a2e9a25 | 1761 | argv_init (&argv); |
6fbf66fa | 1762 | |
6fbf66fa JY |
1763 | network = print_in_addr_t (r->network, 0, &gc); |
1764 | netmask = print_in_addr_t (r->netmask, 0, &gc); | |
1765 | gateway = print_in_addr_t (r->gateway, 0, &gc); | |
1766 | ||
7fb0e07e JY |
1767 | is_local_route = local_route(r->network, r->netmask, r->gateway, rgi); |
1768 | if (is_local_route == LR_ERROR) | |
1769 | goto done; | |
1770 | ||
6fbf66fa | 1771 | #if defined(TARGET_LINUX) |
51bd56f4 | 1772 | #ifdef ENABLE_IPROUTE |
5a2e9a25 | 1773 | argv_printf (&argv, "%s route del %s/%d", |
0aee9ca7 | 1774 | iproute_path, |
6fbf66fa JY |
1775 | network, |
1776 | count_netmask_bits(netmask)); | |
1777 | #else | |
5a2e9a25 | 1778 | argv_printf (&argv, "%s del -net %s netmask %s", |
7fb0e07e JY |
1779 | ROUTE_PATH, |
1780 | network, | |
1781 | netmask); | |
51bd56f4 | 1782 | #endif /*ENABLE_IPROUTE*/ |
7fb0e07e | 1783 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 JY |
1784 | argv_printf_cat (&argv, "metric %d", r->metric); |
1785 | argv_msg (D_ROUTE, &argv); | |
1786 | openvpn_execve_check (&argv, es, 0, "ERROR: Linux route delete command failed"); | |
6fbf66fa JY |
1787 | |
1788 | #elif defined (WIN32) | |
1789 | ||
a8281352 | 1790 | argv_printf (&argv, "%s%sc DELETE %s MASK %s %s", |
5a2e9a25 JY |
1791 | get_win_sys_path(), |
1792 | WIN_ROUTE_PATH_SUFFIX, | |
1793 | network, | |
1794 | netmask, | |
1795 | gateway); | |
6fbf66fa | 1796 | |
5a2e9a25 | 1797 | argv_msg (D_ROUTE, &argv); |
6fbf66fa JY |
1798 | |
1799 | if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI) | |
1800 | { | |
1801 | const bool status = del_route_ipapi (r, tt); | |
1802 | msg (D_ROUTE, "Route deletion via IPAPI %s", status ? "succeeded" : "failed"); | |
1803 | } | |
1804 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE) | |
1805 | { | |
1806 | netcmd_semaphore_lock (); | |
5a2e9a25 | 1807 | openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed"); |
6fbf66fa JY |
1808 | netcmd_semaphore_release (); |
1809 | } | |
6215931b JY |
1810 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE) |
1811 | { | |
1812 | const bool status = del_route_ipapi (r, tt); | |
1813 | msg (D_ROUTE, "Route deletion via IPAPI %s [adaptive]", status ? "succeeded" : "failed"); | |
1814 | if (!status) | |
1815 | { | |
1816 | msg (D_ROUTE, "Route deletion fallback to route.exe"); | |
1817 | netcmd_semaphore_lock (); | |
5a2e9a25 | 1818 | openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed [adaptive]"); |
6215931b JY |
1819 | netcmd_semaphore_release (); |
1820 | } | |
1821 | } | |
6fbf66fa JY |
1822 | else |
1823 | { | |
1824 | ASSERT (0); | |
1825 | } | |
1826 | ||
1827 | #elif defined (TARGET_SOLARIS) | |
1828 | ||
5a2e9a25 JY |
1829 | argv_printf (&argv, "%s delete %s -netmask %s %s", |
1830 | ROUTE_PATH, | |
6fbf66fa JY |
1831 | network, |
1832 | netmask, | |
1833 | gateway); | |
1834 | ||
5a2e9a25 JY |
1835 | argv_msg (D_ROUTE, &argv); |
1836 | openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete command failed"); | |
6fbf66fa JY |
1837 | |
1838 | #elif defined(TARGET_FREEBSD) | |
1839 | ||
5a2e9a25 JY |
1840 | argv_printf (&argv, "%s delete -net %s %s %s", |
1841 | ROUTE_PATH, | |
6fbf66fa JY |
1842 | network, |
1843 | gateway, | |
1844 | netmask); | |
1845 | ||
5a2e9a25 JY |
1846 | argv_msg (D_ROUTE, &argv); |
1847 | openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route delete command failed"); | |
6fbf66fa | 1848 | |
1bda73a7 JY |
1849 | #elif defined(TARGET_DRAGONFLY) |
1850 | ||
5a2e9a25 JY |
1851 | argv_printf (&argv, "%s delete -net %s %s %s", |
1852 | ROUTE_PATH, | |
1bda73a7 JY |
1853 | network, |
1854 | gateway, | |
1855 | netmask); | |
1856 | ||
5a2e9a25 JY |
1857 | argv_msg (D_ROUTE, &argv); |
1858 | openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route delete command failed"); | |
1bda73a7 | 1859 | |
6fbf66fa JY |
1860 | #elif defined(TARGET_DARWIN) |
1861 | ||
8fc83a2d | 1862 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e JY |
1863 | { |
1864 | argv_printf (&argv, "%s delete -cloning -net %s -netmask %s -interface %s", | |
1865 | ROUTE_PATH, | |
1866 | network, | |
1867 | netmask, | |
1868 | rgi->iface); | |
1869 | } | |
1870 | else | |
1871 | { | |
1872 | argv_printf (&argv, "%s delete -net %s %s %s", | |
1873 | ROUTE_PATH, | |
1874 | network, | |
1875 | gateway, | |
1876 | netmask); | |
1877 | } | |
6fbf66fa | 1878 | |
5a2e9a25 JY |
1879 | argv_msg (D_ROUTE, &argv); |
1880 | openvpn_execve_check (&argv, es, 0, "ERROR: OS X route delete command failed"); | |
6fbf66fa JY |
1881 | |
1882 | #elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) | |
1883 | ||
5a2e9a25 JY |
1884 | argv_printf (&argv, "%s delete -net %s %s -netmask %s", |
1885 | ROUTE_PATH, | |
6fbf66fa JY |
1886 | network, |
1887 | gateway, | |
1888 | netmask); | |
1889 | ||
5a2e9a25 JY |
1890 | argv_msg (D_ROUTE, &argv); |
1891 | openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route delete command failed"); | |
a55b3cdb AS |
1892 | #elif defined(TARGET_ANDROID) |
1893 | msg (M_NONFATAL, "Sorry, deleting routes on Android is not possible. The VpnService API allows routes to be set on connect only."); | |
6fbf66fa JY |
1894 | #else |
1895 | 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"); | |
1896 | #endif | |
1897 | ||
7fb0e07e JY |
1898 | done: |
1899 | r->flags &= ~RT_ADDED; | |
5a2e9a25 | 1900 | argv_reset (&argv); |
6fbf66fa JY |
1901 | gc_free (&gc); |
1902 | } | |
1903 | ||
b55e49bd | 1904 | void |
512cda46 GD |
1905 | delete_route_ipv6 (const struct route_ipv6 *r6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) |
1906 | { | |
1907 | struct gc_arena gc; | |
1908 | struct argv argv; | |
1909 | const char *network; | |
1910 | const char *gateway; | |
1911 | const char *device = tt->actual_name; | |
ff9c39b6 | 1912 | bool gateway_needed = false; |
512cda46 GD |
1913 | |
1914 | if (!r6->defined) | |
1915 | return; | |
1916 | ||
1917 | gc_init (&gc); | |
1918 | argv_init (&argv); | |
1919 | ||
b55e49bd | 1920 | network = print_in6_addr_netbits_only( r6->network, r6->netbits, &gc); |
512cda46 GD |
1921 | gateway = print_in6_addr( r6->gateway, 0, &gc); |
1922 | ||
1840c852 GD |
1923 | if ( !tt->ipv6 ) |
1924 | { | |
1925 | msg( M_INFO, "delete_route_ipv6(): not deleting %s/%d, no IPv6 on if %s", | |
1926 | network, r6->netbits, device ); | |
1927 | return; | |
1928 | } | |
1929 | ||
512cda46 GD |
1930 | msg( M_INFO, "delete_route_ipv6(%s/%d)", network, r6->netbits ); |
1931 | ||
ff9c39b6 GD |
1932 | /* if we used a gateway on "add route", we also need to specify it on |
1933 | * delete, otherwise some OSes will refuse to delete the route | |
1934 | */ | |
1935 | if ( tt->type == DEV_TYPE_TAP && | |
1936 | !(r6->metric_defined && r6->metric == 0 ) ) | |
1937 | { | |
1938 | gateway_needed = true; | |
1939 | } | |
1940 | ||
1941 | ||
512cda46 | 1942 | #if defined(TARGET_LINUX) |
51bd56f4 | 1943 | #ifdef ENABLE_IPROUTE |
512cda46 GD |
1944 | argv_printf (&argv, "%s -6 route del %s/%d dev %s", |
1945 | iproute_path, | |
1946 | network, | |
1947 | r6->netbits, | |
1948 | device); | |
ff9c39b6 GD |
1949 | if (gateway_needed) |
1950 | argv_printf_cat (&argv, "via %s", gateway); | |
512cda46 GD |
1951 | #else |
1952 | argv_printf (&argv, "%s -A inet6 del %s/%d dev %s", | |
1953 | ROUTE_PATH, | |
1954 | network, | |
1955 | r6->netbits, | |
1956 | device); | |
ff9c39b6 GD |
1957 | if (gateway_needed) |
1958 | argv_printf_cat (&argv, "gw %s", gateway); | |
1959 | if (r6->metric_defined && r6->metric > 0 ) | |
1960 | argv_printf_cat (&argv, " metric %d", r6->metric); | |
51bd56f4 | 1961 | #endif /*ENABLE_IPROUTE*/ |
512cda46 GD |
1962 | argv_msg (D_ROUTE, &argv); |
1963 | openvpn_execve_check (&argv, es, 0, "ERROR: Linux route -6/-A inet6 del command failed"); | |
1964 | ||
1965 | #elif defined (WIN32) | |
1966 | ||
6607def8 GD |
1967 | /* netsh interface ipv6 delete route 2001:db8::/32 MyTunDevice */ |
1968 | argv_printf (&argv, "%s%sc interface ipv6 delete route %s/%d %s", | |
1969 | get_win_sys_path(), | |
1970 | NETSH_PATH_SUFFIX, | |
1971 | network, | |
1972 | r6->netbits, | |
1973 | device); | |
1974 | ||
94d50a17 GD |
1975 | /* next-hop depends on TUN or TAP mode: |
1976 | * - in TAP mode, we use the "real" next-hop | |
1977 | * - in TUN mode we use a special-case link-local address that the tapdrvr | |
1978 | * knows about and will answer ND (neighbor discovery) packets for | |
1979 | * (and "route deletion without specifying next-hop" does not work...) | |
1980 | */ | |
1981 | if ( tt->type == DEV_TYPE_TUN ) | |
1982 | argv_printf_cat( &argv, " %s", "fe80::8" ); | |
1983 | else | |
1984 | argv_printf_cat( &argv, " %s", gateway ); | |
1985 | ||
6607def8 GD |
1986 | #if 0 |
1987 | if (r->metric_defined) | |
1988 | argv_printf_cat (&argv, "METRIC %d", r->metric); | |
1989 | #endif | |
1990 | ||
1991 | argv_msg (D_ROUTE, &argv); | |
1992 | ||
1993 | netcmd_semaphore_lock (); | |
1994 | openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add ipv6 command failed"); | |
1995 | netcmd_semaphore_release (); | |
512cda46 GD |
1996 | |
1997 | #elif defined (TARGET_SOLARIS) | |
1998 | ||
1999 | /* example: route delete -inet6 2001:db8::/32 somegateway */ | |
2000 | /* GERT-TODO: this is untested, but should work */ | |
2001 | ||
2002 | argv_printf (&argv, "%s delete -inet6 %s/%d %s", | |
2003 | ROUTE_PATH, | |
2004 | network, | |
2005 | r6->netbits, | |
2006 | gateway ); | |
2007 | ||
2008 | argv_msg (D_ROUTE, &argv); | |
2009 | openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete -inet6 command failed"); | |
2010 | ||
2011 | #elif defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) | |
2012 | ||
ff9c39b6 | 2013 | argv_printf (&argv, "%s delete -inet6 %s/%d", |
512cda46 GD |
2014 | ROUTE_PATH, |
2015 | network, | |
ff9c39b6 GD |
2016 | r6->netbits ); |
2017 | ||
2018 | if (gateway_needed) | |
2019 | argv_printf_cat (&argv, "%s", gateway); | |
2020 | else | |
2021 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
2022 | |
2023 | argv_msg (D_ROUTE, &argv); | |
2024 | openvpn_execve_check (&argv, es, 0, "ERROR: *BSD route delete -inet6 command failed"); | |
2025 | ||
2026 | #elif defined(TARGET_DARWIN) | |
2027 | ||
ff9c39b6 | 2028 | argv_printf (&argv, "%s delete -inet6 %s -prefixlen %d", |
512cda46 | 2029 | ROUTE_PATH, |
ff9c39b6 GD |
2030 | network, r6->netbits ); |
2031 | ||
2032 | if (gateway_needed) | |
2033 | argv_printf_cat (&argv, "%s", gateway); | |
2034 | else | |
2035 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
2036 | |
2037 | argv_msg (D_ROUTE, &argv); | |
ff9c39b6 | 2038 | openvpn_execve_check (&argv, es, 0, "ERROR: MacOS X route delete -inet6 command failed"); |
512cda46 | 2039 | |
ada9769e | 2040 | #elif defined(TARGET_OPENBSD) |
512cda46 | 2041 | |
ada9769e GD |
2042 | argv_printf (&argv, "%s delete -inet6 %s -prefixlen %d %s", |
2043 | ROUTE_PATH, | |
2044 | network, r6->netbits, gateway ); | |
2045 | ||
2046 | argv_msg (D_ROUTE, &argv); | |
2047 | openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD route delete -inet6 command failed"); | |
2048 | ||
2049 | #elif defined(TARGET_NETBSD) | |
512cda46 GD |
2050 | |
2051 | argv_printf (&argv, "%s delete -inet6 %s/%d %s", | |
2052 | ROUTE_PATH, | |
2053 | network, r6->netbits, gateway ); | |
2054 | ||
2055 | argv_msg (D_ROUTE, &argv); | |
ada9769e | 2056 | openvpn_execve_check (&argv, es, 0, "ERROR: NetBSD route delete -inet6 command failed"); |
512cda46 GD |
2057 | |
2058 | #else | |
2059 | msg (M_FATAL, "Sorry, but I don't know how to do 'route ipv6' commands on this operating system. Try putting your routes in a --route-down script"); | |
2060 | #endif | |
2061 | ||
2062 | argv_reset (&argv); | |
2063 | gc_free (&gc); | |
2064 | } | |
2065 | ||
6fbf66fa JY |
2066 | /* |
2067 | * The --redirect-gateway option requires OS-specific code below | |
2068 | * to get the current default gateway. | |
2069 | */ | |
2070 | ||
2071 | #if defined(WIN32) | |
2072 | ||
2073 | static const MIB_IPFORWARDTABLE * | |
2074 | get_windows_routing_table (struct gc_arena *gc) | |
2075 | { | |
2076 | ULONG size = 0; | |
2077 | PMIB_IPFORWARDTABLE rt = NULL; | |
2078 | DWORD status; | |
2079 | ||
2080 | status = GetIpForwardTable (NULL, &size, TRUE); | |
2081 | if (status == ERROR_INSUFFICIENT_BUFFER) | |
2082 | { | |
2083 | rt = (PMIB_IPFORWARDTABLE) gc_malloc (size, false, gc); | |
2084 | status = GetIpForwardTable (rt, &size, TRUE); | |
2085 | if (status != NO_ERROR) | |
2086 | { | |
2087 | msg (D_ROUTE, "NOTE: GetIpForwardTable returned error: %s (code=%u)", | |
2088 | strerror_win32 (status, gc), | |
2089 | (unsigned int)status); | |
2090 | rt = NULL; | |
2091 | } | |
2092 | } | |
2093 | return rt; | |
2094 | } | |
2095 | ||
2096 | static int | |
2097 | test_route (const IP_ADAPTER_INFO *adapters, | |
2098 | const in_addr_t gateway, | |
2099 | DWORD *index) | |
2100 | { | |
2101 | int count = 0; | |
f77c60d3 | 2102 | DWORD i = adapter_index_of_ip (adapters, gateway, &count, NULL); |
6fbf66fa JY |
2103 | if (index) |
2104 | *index = i; | |
2105 | return count; | |
2106 | } | |
2107 | ||
2108 | static void | |
2109 | test_route_helper (bool *ret, | |
2110 | int *count, | |
2111 | int *good, | |
2112 | int *ambig, | |
2113 | const IP_ADAPTER_INFO *adapters, | |
2114 | const in_addr_t gateway) | |
2115 | { | |
2116 | int c; | |
2117 | ||
2118 | ++*count; | |
2119 | c = test_route (adapters, gateway, NULL); | |
2120 | if (c == 0) | |
2121 | *ret = false; | |
2122 | else | |
2123 | ++*good; | |
2124 | if (c > 1) | |
2125 | ++*ambig; | |
2126 | } | |
2127 | ||
2128 | /* | |
2129 | * If we tried to add routes now, would we succeed? | |
2130 | */ | |
2131 | bool | |
2132 | test_routes (const struct route_list *rl, const struct tuntap *tt) | |
2133 | { | |
2134 | struct gc_arena gc = gc_new (); | |
2135 | const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); | |
2136 | bool ret = false; | |
2137 | int count = 0; | |
2138 | int good = 0; | |
2139 | int ambig = 0; | |
2140 | bool adapter_up = false; | |
2141 | ||
2142 | if (is_adapter_up (tt, adapters)) | |
2143 | { | |
2144 | ret = true; | |
2145 | adapter_up = true; | |
2146 | ||
2147 | if (rl) | |
2148 | { | |
2149 | int i; | |
2150 | for (i = 0; i < rl->n; ++i) | |
2151 | test_route_helper (&ret, &count, &good, &ambig, adapters, rl->routes[i].gateway); | |
2152 | ||
7fb0e07e | 2153 | if ((rl->flags & RG_ENABLE) && (rl->spec.flags & RTSA_REMOTE_ENDPOINT)) |
6fbf66fa JY |
2154 | test_route_helper (&ret, &count, &good, &ambig, adapters, rl->spec.remote_endpoint); |
2155 | } | |
2156 | } | |
2157 | ||
2158 | msg (D_ROUTE, "TEST ROUTES: %d/%d succeeded len=%d ret=%d a=%d u/d=%s", | |
2159 | good, | |
2160 | count, | |
2161 | rl ? rl->n : -1, | |
2162 | (int)ret, | |
2163 | ambig, | |
2164 | adapter_up ? "up" : "down"); | |
2165 | ||
2166 | gc_free (&gc); | |
2167 | return ret; | |
2168 | } | |
2169 | ||
3c7f2f55 JY |
2170 | static const MIB_IPFORWARDROW * |
2171 | get_default_gateway_row (const MIB_IPFORWARDTABLE *routes) | |
6fbf66fa | 2172 | { |
348fb443 | 2173 | struct gc_arena gc = gc_new (); |
12e46092 | 2174 | DWORD lowest_metric = MAXDWORD; |
3c7f2f55 | 2175 | const MIB_IPFORWARDROW *ret = NULL; |
6fbf66fa | 2176 | int i; |
348fb443 | 2177 | int best = -1; |
6fbf66fa | 2178 | |
3c7f2f55 | 2179 | if (routes) |
6fbf66fa | 2180 | { |
3c7f2f55 JY |
2181 | for (i = 0; i < routes->dwNumEntries; ++i) |
2182 | { | |
2183 | const MIB_IPFORWARDROW *row = &routes->table[i]; | |
2184 | const in_addr_t net = ntohl (row->dwForwardDest); | |
2185 | const in_addr_t mask = ntohl (row->dwForwardMask); | |
2186 | const DWORD index = row->dwForwardIfIndex; | |
348fb443 | 2187 | const DWORD metric = row->dwForwardMetric1; |
6fbf66fa | 2188 | |
348fb443 JY |
2189 | dmsg (D_ROUTE_DEBUG, "GDGR: route[%d] %s/%s i=%d m=%d", |
2190 | i, | |
2191 | print_in_addr_t ((in_addr_t) net, 0, &gc), | |
2192 | print_in_addr_t ((in_addr_t) mask, 0, &gc), | |
2193 | (int)index, | |
2194 | (int)metric); | |
3c7f2f55 | 2195 | |
348fb443 | 2196 | if (!net && !mask && metric < lowest_metric) |
3c7f2f55 JY |
2197 | { |
2198 | ret = row; | |
348fb443 JY |
2199 | lowest_metric = metric; |
2200 | best = i; | |
3c7f2f55 | 2201 | } |
6fbf66fa JY |
2202 | } |
2203 | } | |
348fb443 JY |
2204 | |
2205 | dmsg (D_ROUTE_DEBUG, "GDGR: best=%d lm=%u", best, (unsigned int)lowest_metric); | |
2206 | ||
2207 | gc_free (&gc); | |
3c7f2f55 JY |
2208 | return ret; |
2209 | } | |
2210 | ||
7fb0e07e JY |
2211 | void |
2212 | get_default_gateway (struct route_gateway_info *rgi) | |
3c7f2f55 JY |
2213 | { |
2214 | struct gc_arena gc = gc_new (); | |
3c7f2f55 | 2215 | |
f77c60d3 | 2216 | const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); |
3c7f2f55 JY |
2217 | const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc); |
2218 | const MIB_IPFORWARDROW *row = get_default_gateway_row (routes); | |
7fb0e07e JY |
2219 | DWORD a_index; |
2220 | const IP_ADAPTER_INFO *ai; | |
2221 | ||
2222 | CLEAR(*rgi); | |
3c7f2f55 JY |
2223 | |
2224 | if (row) | |
2225 | { | |
7fb0e07e JY |
2226 | rgi->gateway.addr = ntohl (row->dwForwardNextHop); |
2227 | if (rgi->gateway.addr) | |
f77c60d3 | 2228 | { |
7fb0e07e JY |
2229 | rgi->flags |= RGI_ADDR_DEFINED; |
2230 | a_index = adapter_index_of_ip (adapters, rgi->gateway.addr, NULL, &rgi->gateway.netmask); | |
12e46092 | 2231 | if (a_index != TUN_ADAPTER_INDEX_INVALID) |
7fb0e07e JY |
2232 | { |
2233 | rgi->adapter_index = a_index; | |
2234 | rgi->flags |= (RGI_IFACE_DEFINED|RGI_NETMASK_DEFINED); | |
2235 | ai = get_adapter (adapters, a_index); | |
2236 | if (ai) | |
2237 | { | |
2238 | memcpy (rgi->hwaddr, ai->Address, 6); | |
2239 | rgi->flags |= RGI_HWADDR_DEFINED; | |
2240 | } | |
2241 | } | |
f77c60d3 | 2242 | } |
3c7f2f55 JY |
2243 | } |
2244 | ||
6fbf66fa | 2245 | gc_free (&gc); |
6fbf66fa JY |
2246 | } |
2247 | ||
2248 | static DWORD | |
b57e005b | 2249 | windows_route_find_if_index (const struct route_ipv4 *r, const struct tuntap *tt) |
6fbf66fa JY |
2250 | { |
2251 | struct gc_arena gc = gc_new (); | |
12e46092 | 2252 | DWORD ret = TUN_ADAPTER_INDEX_INVALID; |
6fbf66fa JY |
2253 | int count = 0; |
2254 | const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); | |
2255 | const IP_ADAPTER_INFO *tun_adapter = get_tun_adapter (tt, adapters); | |
2256 | bool on_tun = false; | |
2257 | ||
2258 | /* first test on tun interface */ | |
2259 | if (is_ip_in_adapter_subnet (tun_adapter, r->gateway, NULL)) | |
2260 | { | |
2261 | ret = tun_adapter->Index; | |
2262 | count = 1; | |
2263 | on_tun = true; | |
2264 | } | |
2265 | else /* test on other interfaces */ | |
2266 | { | |
2267 | count = test_route (adapters, r->gateway, &ret); | |
2268 | } | |
2269 | ||
2270 | if (count == 0) | |
2271 | { | |
2272 | msg (M_WARN, "Warning: route gateway is not reachable on any active network adapters: %s", | |
2273 | print_in_addr_t (r->gateway, 0, &gc)); | |
12e46092 | 2274 | ret = TUN_ADAPTER_INDEX_INVALID; |
6fbf66fa JY |
2275 | } |
2276 | else if (count > 1) | |
2277 | { | |
2278 | msg (M_WARN, "Warning: route gateway is ambiguous: %s (%d matches)", | |
2279 | print_in_addr_t (r->gateway, 0, &gc), | |
2280 | count); | |
12e46092 | 2281 | ret = TUN_ADAPTER_INDEX_INVALID; |
6fbf66fa JY |
2282 | } |
2283 | ||
2284 | dmsg (D_ROUTE_DEBUG, "DEBUG: route find if: on_tun=%d count=%d index=%d", | |
2285 | on_tun, | |
2286 | count, | |
2287 | (int)ret); | |
2288 | ||
2289 | gc_free (&gc); | |
2290 | return ret; | |
2291 | } | |
2292 | ||
2293 | bool | |
b57e005b | 2294 | add_route_ipapi (const struct route_ipv4 *r, const struct tuntap *tt, DWORD adapter_index) |
6fbf66fa JY |
2295 | { |
2296 | struct gc_arena gc = gc_new (); | |
2297 | bool ret = false; | |
2298 | DWORD status; | |
12e46092 | 2299 | const DWORD if_index = (adapter_index == TUN_ADAPTER_INDEX_INVALID) ? windows_route_find_if_index (r, tt) : adapter_index; |
6fbf66fa | 2300 | |
12e46092 | 2301 | if (if_index != TUN_ADAPTER_INDEX_INVALID) |
6fbf66fa JY |
2302 | { |
2303 | MIB_IPFORWARDROW fr; | |
2304 | CLEAR (fr); | |
2305 | fr.dwForwardDest = htonl (r->network); | |
2306 | fr.dwForwardMask = htonl (r->netmask); | |
2307 | fr.dwForwardPolicy = 0; | |
2308 | fr.dwForwardNextHop = htonl (r->gateway); | |
2309 | fr.dwForwardIfIndex = if_index; | |
2310 | fr.dwForwardType = 4; /* the next hop is not the final dest */ | |
2311 | fr.dwForwardProto = 3; /* PROTO_IP_NETMGMT */ | |
2312 | fr.dwForwardAge = 0; | |
2313 | fr.dwForwardNextHopAS = 0; | |
7fb0e07e | 2314 | fr.dwForwardMetric1 = (r->flags & RT_METRIC_DEFINED) ? r->metric : 1; |
12e46092 ABL |
2315 | fr.dwForwardMetric2 = METRIC_NOT_USED; |
2316 | fr.dwForwardMetric3 = METRIC_NOT_USED; | |
2317 | fr.dwForwardMetric4 = METRIC_NOT_USED; | |
2318 | fr.dwForwardMetric5 = METRIC_NOT_USED; | |
6fbf66fa JY |
2319 | |
2320 | if ((r->network & r->netmask) != r->network) | |
2321 | msg (M_WARN, "Warning: address %s is not a network address in relation to netmask %s", | |
2322 | print_in_addr_t (r->network, 0, &gc), | |
2323 | print_in_addr_t (r->netmask, 0, &gc)); | |
2324 | ||
2325 | status = CreateIpForwardEntry (&fr); | |
2326 | ||
2327 | if (status == NO_ERROR) | |
2328 | ret = true; | |
2329 | else | |
2330 | { | |
94a43500 JY |
2331 | /* failed, try increasing the metric to work around Vista issue */ |
2332 | const unsigned int forward_metric_limit = 2048; /* iteratively retry higher metrics up to this limit */ | |
6fbf66fa | 2333 | |
94a43500 JY |
2334 | for ( ; fr.dwForwardMetric1 <= forward_metric_limit; ++fr.dwForwardMetric1) |
2335 | { | |
2336 | /* try a different forward type=3 ("the next hop is the final dest") in addition to 4. | |
2337 | --redirect-gateway over RRAS seems to need this. */ | |
2338 | for (fr.dwForwardType = 4; fr.dwForwardType >= 3; --fr.dwForwardType) | |
2339 | { | |
2340 | status = CreateIpForwardEntry (&fr); | |
2341 | if (status == NO_ERROR) | |
2342 | { | |
2343 | msg (D_ROUTE, "ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=%u and dwForwardType=%u", | |
2344 | (unsigned int)fr.dwForwardMetric1, | |
2345 | (unsigned int)fr.dwForwardType); | |
2346 | ret = true; | |
2347 | goto doublebreak; | |
2348 | } | |
2349 | else if (status != ERROR_BAD_ARGUMENTS) | |
2350 | goto doublebreak; | |
2351 | } | |
2352 | } | |
6fbf66fa | 2353 | |
94a43500 JY |
2354 | doublebreak: |
2355 | if (status != NO_ERROR) | |
2356 | msg (M_WARN, "ROUTE: route addition failed using CreateIpForwardEntry: %s [status=%u if_index=%u]", | |
6fbf66fa | 2357 | strerror_win32 (status, &gc), |
94a43500 | 2358 | (unsigned int)status, |
6fbf66fa JY |
2359 | (unsigned int)if_index); |
2360 | } | |
2361 | } | |
2362 | ||
2363 | gc_free (&gc); | |
2364 | return ret; | |
2365 | } | |
2366 | ||
2367 | bool | |
b57e005b | 2368 | del_route_ipapi (const struct route_ipv4 *r, const struct tuntap *tt) |
6fbf66fa JY |
2369 | { |
2370 | struct gc_arena gc = gc_new (); | |
2371 | bool ret = false; | |
2372 | DWORD status; | |
2373 | const DWORD if_index = windows_route_find_if_index (r, tt); | |
2374 | ||
12e46092 | 2375 | if (if_index != TUN_ADAPTER_INDEX_INVALID) |
6fbf66fa JY |
2376 | { |
2377 | MIB_IPFORWARDROW fr; | |
2378 | CLEAR (fr); | |
2379 | ||
2380 | fr.dwForwardDest = htonl (r->network); | |
2381 | fr.dwForwardMask = htonl (r->netmask); | |
2382 | fr.dwForwardPolicy = 0; | |
2383 | fr.dwForwardNextHop = htonl (r->gateway); | |
2384 | fr.dwForwardIfIndex = if_index; | |
2385 | ||
2386 | status = DeleteIpForwardEntry (&fr); | |
2387 | ||
2388 | if (status == NO_ERROR) | |
2389 | ret = true; | |
2390 | else | |
2391 | msg (M_WARN, "ROUTE: route deletion failed using DeleteIpForwardEntry: %s", | |
2392 | strerror_win32 (status, &gc)); | |
2393 | } | |
2394 | ||
2395 | gc_free (&gc); | |
2396 | return ret; | |
2397 | } | |
2398 | ||
2399 | static const char * | |
2400 | format_route_entry (const MIB_IPFORWARDROW *r, struct gc_arena *gc) | |
2401 | { | |
2402 | struct buffer out = alloc_buf_gc (256, gc); | |
2403 | buf_printf (&out, "%s %s %s p=%d i=%d t=%d pr=%d a=%d h=%d m=%d/%d/%d/%d/%d", | |
2404 | print_in_addr_t (r->dwForwardDest, IA_NET_ORDER, gc), | |
2405 | print_in_addr_t (r->dwForwardMask, IA_NET_ORDER, gc), | |
2406 | print_in_addr_t (r->dwForwardNextHop, IA_NET_ORDER, gc), | |
2407 | (int)r->dwForwardPolicy, | |
2408 | (int)r->dwForwardIfIndex, | |
2409 | (int)r->dwForwardType, | |
2410 | (int)r->dwForwardProto, | |
2411 | (int)r->dwForwardAge, | |
2412 | (int)r->dwForwardNextHopAS, | |
2413 | (int)r->dwForwardMetric1, | |
2414 | (int)r->dwForwardMetric2, | |
2415 | (int)r->dwForwardMetric3, | |
2416 | (int)r->dwForwardMetric4, | |
2417 | (int)r->dwForwardMetric5); | |
2418 | return BSTR (&out); | |
2419 | } | |
2420 | ||
2421 | /* | |
2422 | * Show current routing table | |
2423 | */ | |
2424 | void | |
2425 | show_routes (int msglev) | |
2426 | { | |
2427 | struct gc_arena gc = gc_new (); | |
2428 | int i; | |
2429 | ||
2430 | const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc); | |
2431 | ||
2432 | msg (msglev, "SYSTEM ROUTING TABLE"); | |
2433 | if (rt) | |
2434 | { | |
2435 | for (i = 0; i < rt->dwNumEntries; ++i) | |
2436 | { | |
2437 | msg (msglev, "%s", format_route_entry (&rt->table[i], &gc)); | |
2438 | } | |
2439 | } | |
2440 | gc_free (&gc); | |
2441 | } | |
2442 | ||
a55b3cdb | 2443 | #elif defined(TARGET_LINUX) || defined(TARGET_ANDROID) |
6fbf66fa | 2444 | |
7fb0e07e JY |
2445 | void |
2446 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa JY |
2447 | { |
2448 | struct gc_arena gc = gc_new (); | |
7fb0e07e | 2449 | int sd = -1; |
8fc83a2d JY |
2450 | char best_name[16]; |
2451 | best_name[0] = 0; | |
7fb0e07e JY |
2452 | |
2453 | CLEAR(*rgi); | |
2454 | ||
2455 | /* get default gateway IP addr */ | |
2456 | { | |
2457 | FILE *fp = fopen ("/proc/net/route", "r"); | |
2458 | if (fp) | |
2459 | { | |
2460 | char line[256]; | |
2461 | int count = 0; | |
112731fc | 2462 | unsigned int lowest_metric = UINT_MAX; |
7fb0e07e | 2463 | in_addr_t best_gw = 0; |
8fc83a2d | 2464 | bool found = false; |
7fb0e07e JY |
2465 | while (fgets (line, sizeof (line), fp) != NULL) |
2466 | { | |
2467 | if (count) | |
2468 | { | |
2469 | unsigned int net_x = 0; | |
2470 | unsigned int mask_x = 0; | |
2471 | unsigned int gw_x = 0; | |
2472 | unsigned int metric = 0; | |
2473 | unsigned int flags = 0; | |
8fc83a2d JY |
2474 | char name[16]; |
2475 | name[0] = 0; | |
2476 | const int np = sscanf (line, "%15s\t%x\t%x\t%x\t%*s\t%*s\t%d\t%x", | |
2477 | name, | |
7fb0e07e JY |
2478 | &net_x, |
2479 | &gw_x, | |
2480 | &flags, | |
2481 | &metric, | |
2482 | &mask_x); | |
8fc83a2d | 2483 | if (np == 6 && (flags & IFF_UP)) |
7fb0e07e JY |
2484 | { |
2485 | const in_addr_t net = ntohl (net_x); | |
2486 | const in_addr_t mask = ntohl (mask_x); | |
2487 | const in_addr_t gw = ntohl (gw_x); | |
2488 | ||
2489 | if (!net && !mask && metric < lowest_metric) | |
2490 | { | |
8fc83a2d | 2491 | found = true; |
7fb0e07e | 2492 | best_gw = gw; |
8fc83a2d | 2493 | strcpy (best_name, name); |
7fb0e07e JY |
2494 | lowest_metric = metric; |
2495 | } | |
2496 | } | |
2497 | } | |
2498 | ++count; | |
2499 | } | |
2500 | fclose (fp); | |
2501 | ||
8fc83a2d | 2502 | if (found) |
7fb0e07e JY |
2503 | { |
2504 | rgi->gateway.addr = best_gw; | |
2505 | rgi->flags |= RGI_ADDR_DEFINED; | |
8fc83a2d JY |
2506 | if (!rgi->gateway.addr && best_name[0]) |
2507 | rgi->flags |= RGI_ON_LINK; | |
7fb0e07e JY |
2508 | } |
2509 | } | |
2510 | } | |
2511 | ||
2512 | /* scan adapter list */ | |
2513 | if (rgi->flags & RGI_ADDR_DEFINED) | |
2514 | { | |
2515 | struct ifreq *ifr, *ifend; | |
2516 | in_addr_t addr, netmask; | |
2517 | struct ifreq ifreq; | |
2518 | struct ifconf ifc; | |
2519 | struct ifreq ifs[20]; /* Maximum number of interfaces to scan */ | |
2520 | ||
2521 | if ((sd = socket (AF_INET, SOCK_DGRAM, 0)) < 0) | |
6fbf66fa | 2522 | { |
7fb0e07e JY |
2523 | msg (M_WARN, "GDG: socket() failed"); |
2524 | goto done; | |
2525 | } | |
2526 | ifc.ifc_len = sizeof (ifs); | |
2527 | ifc.ifc_req = ifs; | |
2528 | if (ioctl (sd, SIOCGIFCONF, &ifc) < 0) | |
2529 | { | |
2530 | msg (M_WARN, "GDG: ioctl(SIOCGIFCONF) failed"); | |
2531 | goto done; | |
6fbf66fa | 2532 | } |
c9241348 | 2533 | |
7fb0e07e JY |
2534 | /* scan through interface list */ |
2535 | ifend = ifs + (ifc.ifc_len / sizeof (struct ifreq)); | |
2536 | for (ifr = ifc.ifc_req; ifr < ifend; ifr++) | |
03653f42 | 2537 | { |
7fb0e07e | 2538 | if (ifr->ifr_addr.sa_family == AF_INET) |
f77c60d3 | 2539 | { |
7fb0e07e JY |
2540 | /* get interface addr */ |
2541 | addr = ntohl(((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr); | |
2542 | ||
2543 | /* get interface name */ | |
2544 | strncpynt (ifreq.ifr_name, ifr->ifr_name, sizeof (ifreq.ifr_name)); | |
2545 | ||
8fc83a2d | 2546 | /* check that the interface is up */ |
7fb0e07e JY |
2547 | if (ioctl (sd, SIOCGIFFLAGS, &ifreq) < 0) |
2548 | continue; | |
2549 | if (!(ifreq.ifr_flags & IFF_UP)) | |
2550 | continue; | |
2551 | ||
8fc83a2d JY |
2552 | if (rgi->flags & RGI_ON_LINK) |
2553 | { | |
2554 | /* check that interface name of current interface | |
2555 | matches interface name of best default route */ | |
2556 | if (strcmp(ifreq.ifr_name, best_name)) | |
2557 | continue; | |
2558 | #if 0 | |
2559 | /* if point-to-point link, use remote addr as route gateway */ | |
2560 | if ((ifreq.ifr_flags & IFF_POINTOPOINT) && ioctl (sd, SIOCGIFDSTADDR, &ifreq) >= 0) | |
2561 | { | |
2562 | rgi->gateway.addr = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr); | |
2563 | if (rgi->gateway.addr) | |
2564 | rgi->flags &= ~RGI_ON_LINK; | |
2565 | } | |
2566 | #endif | |
2567 | } | |
2568 | else | |
2569 | { | |
2570 | /* get interface netmask */ | |
2571 | if (ioctl (sd, SIOCGIFNETMASK, &ifreq) < 0) | |
2572 | continue; | |
2573 | netmask = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr); | |
2574 | ||
2575 | /* check that interface matches default route */ | |
2576 | if (((rgi->gateway.addr ^ addr) & netmask) != 0) | |
2577 | continue; | |
2578 | ||
2579 | /* save netmask */ | |
2580 | rgi->gateway.netmask = netmask; | |
2581 | rgi->flags |= RGI_NETMASK_DEFINED; | |
2582 | } | |
7fb0e07e | 2583 | |
8fc83a2d | 2584 | /* save iface name */ |
7fb0e07e | 2585 | strncpynt (rgi->iface, ifreq.ifr_name, sizeof(rgi->iface)); |
8fc83a2d | 2586 | rgi->flags |= RGI_IFACE_DEFINED; |
576dc96c | 2587 | |
7fb0e07e JY |
2588 | /* now get the hardware address. */ |
2589 | memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr)); | |
2590 | if (ioctl (sd, SIOCGIFHWADDR, &ifreq) < 0) | |
2591 | { | |
2592 | msg (M_WARN, "GDG: SIOCGIFHWADDR(%s) failed", ifreq.ifr_name); | |
2593 | goto done; | |
2594 | } | |
2595 | memcpy (rgi->hwaddr, &ifreq.ifr_hwaddr.sa_data, 6); | |
2596 | rgi->flags |= RGI_HWADDR_DEFINED; | |
2597 | ||
2598 | break; | |
f77c60d3 | 2599 | } |
03653f42 | 2600 | } |
6fbf66fa JY |
2601 | } |
2602 | ||
7fb0e07e JY |
2603 | done: |
2604 | if (sd >= 0) | |
2605 | close (sd); | |
6fbf66fa | 2606 | gc_free (&gc); |
6fbf66fa JY |
2607 | } |
2608 | ||
1bda73a7 | 2609 | #elif defined(TARGET_FREEBSD)||defined(TARGET_DRAGONFLY) |
6fbf66fa JY |
2610 | |
2611 | #include <sys/types.h> | |
2612 | #include <sys/socket.h> | |
2613 | #include <netinet/in.h> | |
615fb9ef | 2614 | #include <net/route.h> |
6fbf66fa JY |
2615 | |
2616 | struct { | |
2617 | struct rt_msghdr m_rtm; | |
2618 | char m_space[512]; | |
2619 | } m_rtmsg; | |
2620 | ||
2621 | #define ROUNDUP(a) \ | |
2622 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |
2623 | ||
7fb0e07e JY |
2624 | /* |
2625 | * FIXME -- add support for netmask, hwaddr, and iface | |
2626 | */ | |
2627 | void | |
2628 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa JY |
2629 | { |
2630 | struct gc_arena gc = gc_new (); | |
2631 | int s, seq, l, pid, rtm_addrs, i; | |
2632 | struct sockaddr so_dst, so_mask; | |
2633 | char *cp = m_rtmsg.m_space; | |
2634 | struct sockaddr *gate = NULL, *sa; | |
2635 | struct rt_msghdr *rtm_aux; | |
2636 | ||
2637 | #define NEXTADDR(w, u) \ | |
2638 | if (rtm_addrs & (w)) {\ | |
2639 | l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\ | |
2640 | } | |
2641 | ||
2642 | #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) | |
2643 | ||
2644 | #define rtm m_rtmsg.m_rtm | |
2645 | ||
7fb0e07e JY |
2646 | CLEAR(*rgi); |
2647 | ||
6fbf66fa JY |
2648 | pid = getpid(); |
2649 | seq = 0; | |
2650 | rtm_addrs = RTA_DST | RTA_NETMASK; | |
2651 | ||
2652 | bzero(&so_dst, sizeof(so_dst)); | |
2653 | bzero(&so_mask, sizeof(so_mask)); | |
2654 | bzero(&rtm, sizeof(struct rt_msghdr)); | |
2655 | ||
2656 | rtm.rtm_type = RTM_GET; | |
2657 | rtm.rtm_flags = RTF_UP | RTF_GATEWAY; | |
2658 | rtm.rtm_version = RTM_VERSION; | |
2659 | rtm.rtm_seq = ++seq; | |
2660 | rtm.rtm_addrs = rtm_addrs; | |
2661 | ||
2662 | so_dst.sa_family = AF_INET; | |
2663 | so_dst.sa_len = sizeof(struct sockaddr_in); | |
2664 | so_mask.sa_family = AF_INET; | |
2665 | so_mask.sa_len = sizeof(struct sockaddr_in); | |
2666 | ||
2667 | NEXTADDR(RTA_DST, so_dst); | |
2668 | NEXTADDR(RTA_NETMASK, so_mask); | |
2669 | ||
2670 | rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; | |
2671 | ||
2672 | s = socket(PF_ROUTE, SOCK_RAW, 0); | |
2673 | ||
2674 | if (write(s, (char *)&m_rtmsg, l) < 0) | |
2675 | { | |
b3f19cc4 | 2676 | msg(M_WARN|M_ERRNO, "Could not retrieve default gateway from route socket:"); |
6fbf66fa JY |
2677 | gc_free (&gc); |
2678 | close(s); | |
93626f2c | 2679 | return; |
6fbf66fa JY |
2680 | } |
2681 | ||
2682 | do { | |
2683 | l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); | |
2684 | } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); | |
2685 | ||
2686 | close(s); | |
2687 | ||
2688 | rtm_aux = &rtm; | |
2689 | ||
2690 | cp = ((char *)(rtm_aux + 1)); | |
2691 | if (rtm_aux->rtm_addrs) { | |
2692 | for (i = 1; i; i <<= 1) | |
2693 | if (i & rtm_aux->rtm_addrs) { | |
2694 | sa = (struct sockaddr *)cp; | |
2695 | if (i == RTA_GATEWAY ) | |
2696 | gate = sa; | |
2697 | ADVANCE(cp, sa); | |
2698 | } | |
2699 | } | |
2700 | else | |
2701 | { | |
2702 | gc_free (&gc); | |
93626f2c | 2703 | return; |
6fbf66fa JY |
2704 | } |
2705 | ||
2706 | ||
2707 | if (gate != NULL ) | |
2708 | { | |
7fb0e07e JY |
2709 | rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr); |
2710 | rgi->flags |= RGI_ADDR_DEFINED; | |
f77c60d3 | 2711 | |
6fbf66fa | 2712 | gc_free (&gc); |
6fbf66fa JY |
2713 | } |
2714 | else | |
2715 | { | |
2716 | gc_free (&gc); | |
6fbf66fa JY |
2717 | } |
2718 | } | |
2719 | ||
2720 | #elif defined(TARGET_DARWIN) | |
2721 | ||
2722 | #include <sys/types.h> | |
2723 | #include <sys/socket.h> | |
2724 | #include <netinet/in.h> | |
6a8ea970 JY |
2725 | #include <net/route.h> |
2726 | #include <net/if_dl.h> | |
6fbf66fa | 2727 | |
6a8ea970 | 2728 | struct rtmsg { |
6fbf66fa JY |
2729 | struct rt_msghdr m_rtm; |
2730 | char m_space[512]; | |
6a8ea970 | 2731 | }; |
6fbf66fa JY |
2732 | |
2733 | #define ROUNDUP(a) \ | |
3f7c03a2 | 2734 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t)) |
6fbf66fa | 2735 | |
7fb0e07e JY |
2736 | #define NEXTADDR(w, u) \ |
2737 | if (rtm_addrs & (w)) {\ | |
2738 | l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\ | |
2739 | } | |
2740 | ||
2741 | #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) | |
2742 | ||
2743 | #define max(a,b) ((a) > (b) ? (a) : (b)) | |
2744 | ||
2745 | void | |
2746 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa JY |
2747 | { |
2748 | struct gc_arena gc = gc_new (); | |
6a8ea970 | 2749 | struct rtmsg m_rtmsg; |
7fb0e07e JY |
2750 | int sockfd = -1; |
2751 | int seq, l, pid, rtm_addrs, i; | |
6fbf66fa JY |
2752 | struct sockaddr so_dst, so_mask; |
2753 | char *cp = m_rtmsg.m_space; | |
6a8ea970 | 2754 | struct sockaddr *gate = NULL, *ifp = NULL, *sa; |
6fbf66fa JY |
2755 | struct rt_msghdr *rtm_aux; |
2756 | ||
7fb0e07e | 2757 | # define rtm m_rtmsg.m_rtm |
6fbf66fa | 2758 | |
7fb0e07e | 2759 | CLEAR(*rgi); |
6fbf66fa | 2760 | |
7fb0e07e | 2761 | /* setup data to send to routing socket */ |
6fbf66fa JY |
2762 | pid = getpid(); |
2763 | seq = 0; | |
6a8ea970 | 2764 | rtm_addrs = RTA_DST | RTA_NETMASK | RTA_IFP; |
6fbf66fa | 2765 | |
6a8ea970 | 2766 | bzero(&m_rtmsg, sizeof(m_rtmsg)); |
6fbf66fa JY |
2767 | bzero(&so_dst, sizeof(so_dst)); |
2768 | bzero(&so_mask, sizeof(so_mask)); | |
2769 | bzero(&rtm, sizeof(struct rt_msghdr)); | |
2770 | ||
2771 | rtm.rtm_type = RTM_GET; | |
2772 | rtm.rtm_flags = RTF_UP | RTF_GATEWAY; | |
2773 | rtm.rtm_version = RTM_VERSION; | |
2774 | rtm.rtm_seq = ++seq; | |
2775 | rtm.rtm_addrs = rtm_addrs; | |
2776 | ||
2777 | so_dst.sa_family = AF_INET; | |
2778 | so_dst.sa_len = sizeof(struct sockaddr_in); | |
2779 | so_mask.sa_family = AF_INET; | |
2780 | so_mask.sa_len = sizeof(struct sockaddr_in); | |
2781 | ||
2782 | NEXTADDR(RTA_DST, so_dst); | |
2783 | NEXTADDR(RTA_NETMASK, so_mask); | |
2784 | ||
2785 | rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; | |
2786 | ||
7fb0e07e JY |
2787 | /* transact with routing socket */ |
2788 | sockfd = socket(PF_ROUTE, SOCK_RAW, 0); | |
2789 | if (sockfd < 0) | |
6fbf66fa | 2790 | { |
7fb0e07e JY |
2791 | msg (M_WARN, "GDG: socket #1 failed"); |
2792 | goto done; | |
2793 | } | |
2794 | if (write(sockfd, (char *)&m_rtmsg, l) < 0) | |
2795 | { | |
2796 | msg (M_WARN, "GDG: problem writing to routing socket"); | |
2797 | goto done; | |
6fbf66fa | 2798 | } |
6fbf66fa | 2799 | do { |
7fb0e07e | 2800 | l = read(sockfd, (char *)&m_rtmsg, sizeof(m_rtmsg)); |
6fbf66fa | 2801 | } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); |
7fb0e07e JY |
2802 | close(sockfd); |
2803 | sockfd = -1; | |
6fbf66fa | 2804 | |
7fb0e07e | 2805 | /* extract return data from routing socket */ |
6fbf66fa | 2806 | rtm_aux = &rtm; |
6fbf66fa | 2807 | cp = ((char *)(rtm_aux + 1)); |
7fb0e07e JY |
2808 | if (rtm_aux->rtm_addrs) |
2809 | { | |
2810 | for (i = 1; i; i <<= 1) | |
2811 | { | |
2812 | if (i & rtm_aux->rtm_addrs) | |
2813 | { | |
2814 | sa = (struct sockaddr *)cp; | |
2815 | if (i == RTA_GATEWAY ) | |
2816 | gate = sa; | |
2817 | else if (i == RTA_IFP) | |
2818 | ifp = sa; | |
2819 | ADVANCE(cp, sa); | |
2820 | } | |
2821 | } | |
2822 | } | |
6fbf66fa | 2823 | else |
7fb0e07e JY |
2824 | goto done; |
2825 | ||
2826 | /* get gateway addr and interface name */ | |
2827 | if (gate != NULL ) | |
6fbf66fa | 2828 | { |
7fb0e07e JY |
2829 | /* get default gateway addr */ |
2830 | rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr); | |
2831 | if (rgi->gateway.addr) | |
2832 | rgi->flags |= RGI_ADDR_DEFINED; | |
2833 | ||
2834 | if (ifp) | |
2835 | { | |
2836 | /* get interface name */ | |
2837 | const struct sockaddr_dl *adl = (struct sockaddr_dl *) ifp; | |
7fb0e07e JY |
2838 | if (adl->sdl_nlen && adl->sdl_nlen < sizeof(rgi->iface)) |
2839 | { | |
2840 | memcpy (rgi->iface, adl->sdl_data, adl->sdl_nlen); | |
2841 | rgi->iface[adl->sdl_nlen] = '\0'; | |
2842 | rgi->flags |= RGI_IFACE_DEFINED; | |
2843 | } | |
2844 | } | |
6fbf66fa JY |
2845 | } |
2846 | ||
7fb0e07e JY |
2847 | /* get netmask of interface that owns default gateway */ |
2848 | if (rgi->flags & RGI_IFACE_DEFINED) { | |
2849 | struct ifreq ifr; | |
6fbf66fa | 2850 | |
7fb0e07e JY |
2851 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); |
2852 | if (sockfd < 0) | |
2853 | { | |
2854 | msg (M_WARN, "GDG: socket #2 failed"); | |
2855 | goto done; | |
2856 | } | |
2857 | ||
2858 | CLEAR(ifr); | |
2859 | ifr.ifr_addr.sa_family = AF_INET; | |
2860 | strncpynt(ifr.ifr_name, rgi->iface, IFNAMSIZ); | |
2861 | ||
2862 | if (ioctl(sockfd, SIOCGIFNETMASK, (char *)&ifr) < 0) | |
2863 | { | |
2864 | msg (M_WARN, "GDG: ioctl #1 failed"); | |
2865 | goto done; | |
2866 | } | |
2867 | close(sockfd); | |
2868 | sockfd = -1; | |
2869 | ||
2870 | rgi->gateway.netmask = ntohl(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr); | |
2871 | rgi->flags |= RGI_NETMASK_DEFINED; | |
2872 | } | |
2873 | ||
2874 | /* try to read MAC addr associated with interface that owns default gateway */ | |
2875 | if (rgi->flags & RGI_IFACE_DEFINED) | |
6fbf66fa | 2876 | { |
7fb0e07e JY |
2877 | struct ifconf ifc; |
2878 | struct ifreq *ifr; | |
2879 | const int bufsize = 4096; | |
2880 | char *buffer; | |
6fbf66fa | 2881 | |
7fb0e07e JY |
2882 | buffer = (char *) gc_malloc (bufsize, true, &gc); |
2883 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
2884 | if (sockfd < 0) | |
f77c60d3 | 2885 | { |
7fb0e07e JY |
2886 | msg (M_WARN, "GDG: socket #3 failed"); |
2887 | goto done; | |
f77c60d3 JY |
2888 | } |
2889 | ||
7fb0e07e JY |
2890 | ifc.ifc_len = bufsize; |
2891 | ifc.ifc_buf = buffer; | |
2892 | ||
2893 | if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0) | |
6a8ea970 | 2894 | { |
7fb0e07e JY |
2895 | msg (M_WARN, "GDG: ioctl #2 failed"); |
2896 | goto done; | |
6a8ea970 | 2897 | } |
7fb0e07e JY |
2898 | close(sockfd); |
2899 | sockfd = -1; | |
6a8ea970 | 2900 | |
7fb0e07e JY |
2901 | for (cp = buffer; cp <= buffer + ifc.ifc_len - sizeof(struct ifreq); ) |
2902 | { | |
2903 | ifr = (struct ifreq *)cp; | |
2904 | const size_t len = sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len); | |
2905 | if (!ifr->ifr_addr.sa_family) | |
2906 | break; | |
2907 | if (!strncmp(ifr->ifr_name, rgi->iface, IFNAMSIZ)) | |
2908 | { | |
2909 | if (ifr->ifr_addr.sa_family == AF_LINK) | |
2910 | { | |
2911 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr; | |
2912 | memcpy(rgi->hwaddr, LLADDR(sdl), 6); | |
2913 | rgi->flags |= RGI_HWADDR_DEFINED; | |
2914 | } | |
2915 | } | |
2916 | cp += len; | |
2917 | } | |
6fbf66fa | 2918 | } |
6fbf66fa | 2919 | |
7fb0e07e JY |
2920 | done: |
2921 | if (sockfd >= 0) | |
2922 | close(sockfd); | |
2923 | gc_free (&gc); | |
6a8ea970 JY |
2924 | } |
2925 | ||
7fb0e07e JY |
2926 | #undef max |
2927 | ||
6fbf66fa JY |
2928 | #elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) |
2929 | ||
2930 | #include <sys/types.h> | |
2931 | #include <sys/socket.h> | |
2932 | #include <netinet/in.h> | |
615fb9ef | 2933 | #include <net/route.h> |
6fbf66fa JY |
2934 | |
2935 | struct { | |
2936 | struct rt_msghdr m_rtm; | |
2937 | char m_space[512]; | |
2938 | } m_rtmsg; | |
2939 | ||
2940 | #define ROUNDUP(a) \ | |
2941 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |
2942 | ||
7fb0e07e JY |
2943 | /* |
2944 | * FIXME -- add support for netmask, hwaddr, and iface | |
2945 | */ | |
2946 | void | |
2947 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa JY |
2948 | { |
2949 | struct gc_arena gc = gc_new (); | |
2950 | int s, seq, l, rtm_addrs, i; | |
2951 | pid_t pid; | |
2952 | struct sockaddr so_dst, so_mask; | |
2953 | char *cp = m_rtmsg.m_space; | |
2954 | struct sockaddr *gate = NULL, *sa; | |
2955 | struct rt_msghdr *rtm_aux; | |
2956 | ||
2957 | #define NEXTADDR(w, u) \ | |
2958 | if (rtm_addrs & (w)) {\ | |
2959 | l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\ | |
2960 | } | |
2961 | ||
2962 | #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) | |
2963 | ||
2964 | #define rtm m_rtmsg.m_rtm | |
2965 | ||
7fb0e07e JY |
2966 | CLEAR(*rgi); |
2967 | ||
6fbf66fa JY |
2968 | pid = getpid(); |
2969 | seq = 0; | |
2970 | rtm_addrs = RTA_DST | RTA_NETMASK; | |
2971 | ||
2972 | bzero(&so_dst, sizeof(so_dst)); | |
2973 | bzero(&so_mask, sizeof(so_mask)); | |
2974 | bzero(&rtm, sizeof(struct rt_msghdr)); | |
2975 | ||
2976 | rtm.rtm_type = RTM_GET; | |
2977 | rtm.rtm_flags = RTF_UP | RTF_GATEWAY; | |
2978 | rtm.rtm_version = RTM_VERSION; | |
2979 | rtm.rtm_seq = ++seq; | |
2980 | rtm.rtm_addrs = rtm_addrs; | |
2981 | ||
2982 | so_dst.sa_family = AF_INET; | |
2983 | so_dst.sa_len = sizeof(struct sockaddr_in); | |
2984 | so_mask.sa_family = AF_INET; | |
2985 | so_mask.sa_len = sizeof(struct sockaddr_in); | |
2986 | ||
2987 | NEXTADDR(RTA_DST, so_dst); | |
2988 | NEXTADDR(RTA_NETMASK, so_mask); | |
2989 | ||
2990 | rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; | |
2991 | ||
2992 | s = socket(PF_ROUTE, SOCK_RAW, 0); | |
2993 | ||
2994 | if (write(s, (char *)&m_rtmsg, l) < 0) | |
2995 | { | |
b3f19cc4 | 2996 | msg(M_WARN|M_ERRNO, "Could not retrieve default gateway from route socket:"); |
6fbf66fa JY |
2997 | gc_free (&gc); |
2998 | close(s); | |
93626f2c | 2999 | return; |
6fbf66fa JY |
3000 | } |
3001 | ||
3002 | do { | |
3003 | l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); | |
3004 | } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); | |
3005 | ||
3006 | close(s); | |
3007 | ||
3008 | rtm_aux = &rtm; | |
3009 | ||
3010 | cp = ((char *)(rtm_aux + 1)); | |
3011 | if (rtm_aux->rtm_addrs) { | |
3012 | for (i = 1; i; i <<= 1) | |
3013 | if (i & rtm_aux->rtm_addrs) { | |
3014 | sa = (struct sockaddr *)cp; | |
3015 | if (i == RTA_GATEWAY ) | |
3016 | gate = sa; | |
3017 | ADVANCE(cp, sa); | |
3018 | } | |
3019 | } | |
3020 | else | |
3021 | { | |
3022 | gc_free (&gc); | |
93626f2c | 3023 | return; |
6fbf66fa JY |
3024 | } |
3025 | ||
3026 | ||
3027 | if (gate != NULL ) | |
3028 | { | |
7fb0e07e JY |
3029 | rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr); |
3030 | rgi->flags |= RGI_ADDR_DEFINED; | |
f77c60d3 | 3031 | |
6fbf66fa | 3032 | gc_free (&gc); |
6fbf66fa JY |
3033 | } |
3034 | else | |
3035 | { | |
3036 | gc_free (&gc); | |
6fbf66fa JY |
3037 | } |
3038 | } | |
3039 | ||
3040 | #else | |
3041 | ||
7fb0e07e JY |
3042 | /* |
3043 | * This is a platform-specific method that returns data about | |
3044 | * the current default gateway. Return data is placed into | |
3045 | * a struct route_gateway_info object provided by caller. The | |
3046 | * implementation should CLEAR the structure before adding | |
3047 | * data to it. | |
3048 | * | |
3049 | * Data returned includes: | |
3050 | * 1. default gateway address (rgi->gateway.addr) | |
3051 | * 2. netmask of interface that owns default gateway | |
3052 | * (rgi->gateway.netmask) | |
3053 | * 3. hardware address (i.e. MAC address) of interface that owns | |
3054 | * default gateway (rgi->hwaddr) | |
3055 | * 4. interface name (or adapter index on Windows) that owns default | |
3056 | * gateway (rgi->iface or rgi->adapter_index) | |
3057 | * 5. an array of additional address/netmask pairs defined by | |
3058 | * interface that owns default gateway (rgi->addrs with length | |
3059 | * given in rgi->n_addrs) | |
3060 | * | |
3061 | * The flags RGI_x_DEFINED may be used to indicate which of the data | |
3062 | * members were successfully returned (set in rgi->flags). All of | |
3063 | * the data members are optional, however certain OpenVPN functionality | |
3064 | * may be disabled by missing items. | |
3065 | */ | |
3066 | void | |
3067 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa | 3068 | { |
7fb0e07e | 3069 | CLEAR(*rgi); |
6fbf66fa JY |
3070 | } |
3071 | ||
3072 | #endif | |
3073 | ||
3074 | bool | |
3075 | netmask_to_netbits (const in_addr_t network, const in_addr_t netmask, int *netbits) | |
3076 | { | |
3077 | int i; | |
3078 | const int addrlen = sizeof (in_addr_t) * 8; | |
3079 | ||
3080 | if ((network & netmask) == network) | |
3081 | { | |
3082 | for (i = 0; i <= addrlen; ++i) | |
3083 | { | |
3084 | in_addr_t mask = netbits_to_netmask (i); | |
3085 | if (mask == netmask) | |
3086 | { | |
3087 | if (i == addrlen) | |
3088 | *netbits = -1; | |
3089 | else | |
3090 | *netbits = i; | |
3091 | return true; | |
3092 | } | |
3093 | } | |
3094 | } | |
3095 | return false; | |
3096 | } | |
3c7f2f55 JY |
3097 | |
3098 | /* | |
3099 | * get_bypass_addresses() is used by the redirect-gateway bypass-x | |
3100 | * functions to build a route bypass to selected DHCP/DNS servers, | |
3101 | * so that outgoing packets to these servers don't end up in the tunnel. | |
3102 | */ | |
3103 | ||
3104 | #if defined(WIN32) | |
3105 | ||
3106 | static void | |
775a6ac2 | 3107 | add_host_route_if_nonlocal (struct route_bypass *rb, const in_addr_t addr) |
3c7f2f55 | 3108 | { |
32e576d2 | 3109 | if (test_local_addr(addr, NULL) == TLA_NONLOCAL && addr != 0 && addr != IPV4_NETMASK_HOST) |
d02a86d3 | 3110 | add_bypass_address (rb, addr); |
3c7f2f55 JY |
3111 | } |
3112 | ||
3113 | static void | |
775a6ac2 | 3114 | add_host_route_array (struct route_bypass *rb, const IP_ADDR_STRING *iplist) |
3c7f2f55 JY |
3115 | { |
3116 | while (iplist) | |
3117 | { | |
3118 | bool succeed = false; | |
3119 | const in_addr_t ip = getaddr (GETADDR_HOST_ORDER, iplist->IpAddress.String, 0, &succeed, NULL); | |
3120 | if (succeed) | |
3121 | { | |
775a6ac2 | 3122 | add_host_route_if_nonlocal (rb, ip); |
3c7f2f55 JY |
3123 | } |
3124 | iplist = iplist->Next; | |
3125 | } | |
3126 | } | |
3127 | ||
3128 | static void | |
3129 | get_bypass_addresses (struct route_bypass *rb, const unsigned int flags) | |
3130 | { | |
3131 | struct gc_arena gc = gc_new (); | |
c373382c | 3132 | /*bool ret_bool = false;*/ |
3c7f2f55 JY |
3133 | |
3134 | /* get full routing table */ | |
3135 | const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc); | |
3136 | ||
3137 | /* get the route which represents the default gateway */ | |
3138 | const MIB_IPFORWARDROW *row = get_default_gateway_row (routes); | |
3139 | ||
3140 | if (row) | |
3141 | { | |
3142 | /* get the adapter which the default gateway is associated with */ | |
3143 | const IP_ADAPTER_INFO *dgi = get_adapter_info (row->dwForwardIfIndex, &gc); | |
3144 | ||
3145 | /* get extra adapter info, such as DNS addresses */ | |
3146 | const IP_PER_ADAPTER_INFO *pai = get_per_adapter_info (row->dwForwardIfIndex, &gc); | |
3147 | ||
3148 | /* Bypass DHCP server address */ | |
3149 | if ((flags & RG_BYPASS_DHCP) && dgi && dgi->DhcpEnabled) | |
775a6ac2 | 3150 | add_host_route_array (rb, &dgi->DhcpServer); |
3c7f2f55 JY |
3151 | |
3152 | /* Bypass DNS server addresses */ | |
3153 | if ((flags & RG_BYPASS_DNS) && pai) | |
775a6ac2 | 3154 | add_host_route_array (rb, &pai->DnsServerList); |
3c7f2f55 JY |
3155 | } |
3156 | ||
3157 | gc_free (&gc); | |
3158 | } | |
3159 | ||
3160 | #else | |
3161 | ||
3162 | static void | |
c705be2a | 3163 | get_bypass_addresses (struct route_bypass *rb, const unsigned int flags) /* PLATFORM-SPECIFIC */ |
3c7f2f55 JY |
3164 | { |
3165 | } | |
3166 | ||
3167 | #endif | |
5f31881e | 3168 | |
775a6ac2 JY |
3169 | /* |
3170 | * Test if addr is reachable via a local interface (return ILA_LOCAL), | |
3171 | * or if it needs to be routed via the default gateway (return | |
3172 | * ILA_NONLOCAL). If the target platform doesn't implement this | |
3173 | * function, return ILA_NOT_IMPLEMENTED. | |
3174 | * | |
3175 | * Used by redirect-gateway autolocal feature | |
3176 | */ | |
3177 | ||
3178 | #if defined(WIN32) | |
3179 | ||
3180 | int | |
7fb0e07e | 3181 | test_local_addr (const in_addr_t addr, const struct route_gateway_info *rgi) |
775a6ac2 JY |
3182 | { |
3183 | struct gc_arena gc = gc_new (); | |
3184 | const in_addr_t nonlocal_netmask = 0x80000000L; /* routes with netmask <= to this are considered non-local */ | |
3185 | bool ret = TLA_NONLOCAL; | |
3186 | ||
3187 | /* get full routing table */ | |
3188 | const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc); | |
3189 | if (rt) | |
3190 | { | |
3191 | int i; | |
3192 | for (i = 0; i < rt->dwNumEntries; ++i) | |
3193 | { | |
3194 | const MIB_IPFORWARDROW *row = &rt->table[i]; | |
3195 | const in_addr_t net = ntohl (row->dwForwardDest); | |
3196 | const in_addr_t mask = ntohl (row->dwForwardMask); | |
3197 | if (mask > nonlocal_netmask && (addr & mask) == net) | |
3198 | { | |
3199 | ret = TLA_LOCAL; | |
3200 | break; | |
3201 | } | |
3202 | } | |
3203 | } | |
3204 | ||
3205 | gc_free (&gc); | |
3206 | return ret; | |
3207 | } | |
3208 | ||
3209 | #else | |
3210 | ||
775a6ac2 | 3211 | int |
7fb0e07e | 3212 | test_local_addr (const in_addr_t addr, const struct route_gateway_info *rgi) /* PLATFORM-SPECIFIC */ |
775a6ac2 | 3213 | { |
7fb0e07e JY |
3214 | if (rgi) |
3215 | { | |
3216 | if (local_route (addr, 0xFFFFFFFF, rgi->gateway.addr, rgi)) | |
3217 | return TLA_LOCAL; | |
3218 | else | |
3219 | return TLA_NONLOCAL; | |
3220 | } | |
775a6ac2 JY |
3221 | return TLA_NOT_IMPLEMENTED; |
3222 | } | |
3223 | ||
3224 | #endif |