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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 * |
d0085293 | 95 | new_route_option_list (struct gc_arena *a) |
6fbf66fa JY |
96 | { |
97 | struct route_option_list *ret; | |
d0085293 HH |
98 | ALLOC_OBJ_CLEAR_GC (ret, struct route_option_list, a); |
99 | ret->gc = a; | |
6fbf66fa JY |
100 | return ret; |
101 | } | |
102 | ||
512cda46 | 103 | struct route_ipv6_option_list * |
d0085293 | 104 | new_route_ipv6_option_list (struct gc_arena *a) |
512cda46 GD |
105 | { |
106 | struct route_ipv6_option_list *ret; | |
d0085293 HH |
107 | ALLOC_OBJ_CLEAR_GC (ret, struct route_ipv6_option_list, a); |
108 | ret->gc = a; | |
512cda46 GD |
109 | return ret; |
110 | } | |
111 | ||
d0085293 HH |
112 | /* |
113 | * NOTE: structs are cloned/copied shallow by design. | |
114 | * The routes list from src will stay intact since it is allocated using | |
115 | * the options->gc. The cloned/copied lists will share this common tail | |
116 | * to avoid copying the data around between pulls. Pulled routes use | |
117 | * the c2->gc so they get freed immediately after a reconnect. | |
118 | */ | |
673f583f JY |
119 | struct route_option_list * |
120 | clone_route_option_list (const struct route_option_list *src, struct gc_arena *a) | |
121 | { | |
d0085293 HH |
122 | struct route_option_list *ret; |
123 | ALLOC_OBJ_GC (ret, struct route_option_list, a); | |
124 | *ret = *src; | |
673f583f JY |
125 | return ret; |
126 | } | |
127 | ||
91402236 GD |
128 | struct route_ipv6_option_list * |
129 | clone_route_ipv6_option_list (const struct route_ipv6_option_list *src, struct gc_arena *a) | |
130 | { | |
d0085293 HH |
131 | struct route_ipv6_option_list *ret; |
132 | ALLOC_OBJ_GC (ret, struct route_ipv6_option_list, a); | |
133 | *ret = *src; | |
91402236 GD |
134 | return ret; |
135 | } | |
136 | ||
673f583f | 137 | void |
d0085293 | 138 | copy_route_option_list (struct route_option_list *dest, const struct route_option_list *src, struct gc_arena *a) |
673f583f | 139 | { |
d0085293 HH |
140 | *dest = *src; |
141 | dest->gc = a; | |
673f583f JY |
142 | } |
143 | ||
91402236 GD |
144 | void |
145 | copy_route_ipv6_option_list (struct route_ipv6_option_list *dest, | |
d0085293 HH |
146 | const struct route_ipv6_option_list *src, |
147 | struct gc_arena *a) | |
512cda46 | 148 | { |
d0085293 HH |
149 | *dest = *src; |
150 | dest->gc = a; | |
512cda46 GD |
151 | } |
152 | ||
6fbf66fa | 153 | static const char * |
b57e005b | 154 | route_string (const struct route_ipv4 *r, struct gc_arena *gc) |
6fbf66fa JY |
155 | { |
156 | struct buffer out = alloc_buf_gc (256, gc); | |
157 | buf_printf (&out, "ROUTE network %s netmask %s gateway %s", | |
158 | print_in_addr_t (r->network, 0, gc), | |
159 | print_in_addr_t (r->netmask, 0, gc), | |
160 | print_in_addr_t (r->gateway, 0, gc) | |
161 | ); | |
7fb0e07e | 162 | if (r->flags & RT_METRIC_DEFINED) |
6fbf66fa JY |
163 | buf_printf (&out, " metric %d", r->metric); |
164 | return BSTR (&out); | |
165 | } | |
166 | ||
167 | static bool | |
168 | is_route_parm_defined (const char *parm) | |
169 | { | |
170 | if (!parm) | |
171 | return false; | |
172 | if (!strcmp (parm, "default")) | |
173 | return false; | |
174 | return true; | |
175 | } | |
176 | ||
177 | static void | |
178 | setenv_route_addr (struct env_set *es, const char *key, const in_addr_t addr, int i) | |
179 | { | |
180 | struct gc_arena gc = gc_new (); | |
181 | struct buffer name = alloc_buf_gc (256, &gc); | |
182 | if (i >= 0) | |
183 | buf_printf (&name, "route_%s_%d", key, i); | |
184 | else | |
185 | buf_printf (&name, "route_%s", key); | |
186 | setenv_str (es, BSTR (&name), print_in_addr_t (addr, 0, &gc)); | |
187 | gc_free (&gc); | |
188 | } | |
189 | ||
190 | static bool | |
7fb0e07e | 191 | get_special_addr (const struct route_list *rl, |
6fbf66fa JY |
192 | const char *string, |
193 | in_addr_t *out, | |
194 | bool *status) | |
195 | { | |
b4073a76 JY |
196 | if (status) |
197 | *status = true; | |
6fbf66fa JY |
198 | if (!strcmp (string, "vpn_gateway")) |
199 | { | |
7fb0e07e | 200 | if (rl) |
6fbf66fa | 201 | { |
7fb0e07e JY |
202 | if (rl->spec.flags & RTSA_REMOTE_ENDPOINT) |
203 | *out = rl->spec.remote_endpoint; | |
b4073a76 JY |
204 | else |
205 | { | |
206 | msg (M_INFO, PACKAGE_NAME " ROUTE: vpn_gateway undefined"); | |
207 | if (status) | |
208 | *status = false; | |
209 | } | |
6fbf66fa JY |
210 | } |
211 | return true; | |
212 | } | |
213 | else if (!strcmp (string, "net_gateway")) | |
214 | { | |
7fb0e07e | 215 | if (rl) |
6fbf66fa | 216 | { |
7fb0e07e JY |
217 | if (rl->rgi.flags & RGI_ADDR_DEFINED) |
218 | *out = rl->rgi.gateway.addr; | |
b4073a76 JY |
219 | else |
220 | { | |
221 | msg (M_INFO, PACKAGE_NAME " ROUTE: net_gateway undefined -- unable to get default gateway from system"); | |
222 | if (status) | |
223 | *status = false; | |
224 | } | |
6fbf66fa JY |
225 | } |
226 | return true; | |
227 | } | |
228 | else if (!strcmp (string, "remote_host")) | |
229 | { | |
7fb0e07e | 230 | if (rl) |
6fbf66fa | 231 | { |
7fb0e07e JY |
232 | if (rl->spec.flags & RTSA_REMOTE_HOST) |
233 | *out = rl->spec.remote_host; | |
b4073a76 JY |
234 | else |
235 | { | |
236 | msg (M_INFO, PACKAGE_NAME " ROUTE: remote_host undefined"); | |
237 | if (status) | |
238 | *status = false; | |
239 | } | |
6fbf66fa JY |
240 | } |
241 | return true; | |
242 | } | |
243 | return false; | |
244 | } | |
245 | ||
b4073a76 JY |
246 | bool |
247 | is_special_addr (const char *addr_str) | |
248 | { | |
249 | if (addr_str) | |
250 | return get_special_addr (NULL, addr_str, NULL, NULL); | |
251 | else | |
252 | return false; | |
253 | } | |
254 | ||
6fbf66fa | 255 | static bool |
b57e005b | 256 | init_route (struct route_ipv4 *r, |
f2d6f3bc | 257 | struct addrinfo **network_list, |
6fbf66fa | 258 | const struct route_option *ro, |
7fb0e07e | 259 | const struct route_list *rl) |
6fbf66fa | 260 | { |
32e576d2 | 261 | const in_addr_t default_netmask = IPV4_NETMASK_HOST; |
6fbf66fa | 262 | bool status; |
f2d6f3bc AS |
263 | int ret; |
264 | struct in_addr special; | |
6fbf66fa | 265 | |
7fb0e07e | 266 | CLEAR (*r); |
6fbf66fa | 267 | r->option = ro; |
6fbf66fa JY |
268 | |
269 | /* network */ | |
270 | ||
271 | if (!is_route_parm_defined (ro->network)) | |
272 | { | |
273 | goto fail; | |
274 | } | |
f2d6f3bc AS |
275 | |
276 | ||
277 | /* get_special_addr replaces specialaddr with a special ip addr | |
278 | like gw. getaddrinfo is called to convert a a addrinfo struct */ | |
279 | ||
a2466d9e | 280 | if(get_special_addr (rl, ro->network, (in_addr_t *) &special.s_addr, &status)) |
6fbf66fa | 281 | { |
f2d6f3bc | 282 | special.s_addr = htonl(special.s_addr); |
076fd3e4 | 283 | ret = openvpn_getaddrinfo(0, inet_ntoa(special), NULL, 0, NULL, |
f2d6f3bc | 284 | AF_INET, network_list); |
6fbf66fa | 285 | } |
f2d6f3bc AS |
286 | else |
287 | ret = openvpn_getaddrinfo(GETADDR_RESOLVE | GETADDR_WARN_ON_SIGNAL, | |
076fd3e4 | 288 | ro->network, NULL, 0, NULL, AF_INET, network_list); |
f2d6f3bc AS |
289 | |
290 | status = (ret == 0); | |
6fbf66fa JY |
291 | |
292 | if (!status) | |
293 | goto fail; | |
294 | ||
295 | /* netmask */ | |
296 | ||
297 | if (is_route_parm_defined (ro->netmask)) | |
298 | { | |
299 | r->netmask = getaddr ( | |
300 | GETADDR_HOST_ORDER | |
301 | | GETADDR_WARN_ON_SIGNAL, | |
302 | ro->netmask, | |
303 | 0, | |
304 | &status, | |
305 | NULL); | |
306 | if (!status) | |
307 | goto fail; | |
308 | } | |
309 | else | |
310 | r->netmask = default_netmask; | |
311 | ||
312 | /* gateway */ | |
313 | ||
314 | if (is_route_parm_defined (ro->gateway)) | |
315 | { | |
7fb0e07e | 316 | if (!get_special_addr (rl, ro->gateway, &r->gateway, &status)) |
6fbf66fa JY |
317 | { |
318 | r->gateway = getaddr ( | |
319 | GETADDR_RESOLVE | |
320 | | GETADDR_HOST_ORDER | |
321 | | GETADDR_WARN_ON_SIGNAL, | |
322 | ro->gateway, | |
323 | 0, | |
324 | &status, | |
325 | NULL); | |
326 | } | |
327 | if (!status) | |
328 | goto fail; | |
329 | } | |
330 | else | |
331 | { | |
7fb0e07e JY |
332 | if (rl->spec.flags & RTSA_REMOTE_ENDPOINT) |
333 | r->gateway = rl->spec.remote_endpoint; | |
6fbf66fa JY |
334 | else |
335 | { | |
336 | 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"); | |
337 | goto fail; | |
338 | } | |
339 | } | |
340 | ||
341 | /* metric */ | |
342 | ||
6fbf66fa JY |
343 | r->metric = 0; |
344 | if (is_route_parm_defined (ro->metric)) | |
345 | { | |
346 | r->metric = atoi (ro->metric); | |
347 | if (r->metric < 0) | |
348 | { | |
349 | msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0", | |
350 | ro->network, | |
351 | ro->metric); | |
352 | goto fail; | |
353 | } | |
7fb0e07e | 354 | r->flags |= RT_METRIC_DEFINED; |
6fbf66fa | 355 | } |
7fb0e07e | 356 | else if (rl->spec.flags & RTSA_DEFAULT_METRIC) |
6fbf66fa | 357 | { |
7fb0e07e JY |
358 | r->metric = rl->spec.default_metric; |
359 | r->flags |= RT_METRIC_DEFINED; | |
6fbf66fa JY |
360 | } |
361 | ||
7fb0e07e | 362 | r->flags |= RT_DEFINED; |
6fbf66fa JY |
363 | |
364 | return true; | |
365 | ||
366 | fail: | |
367 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s", | |
368 | ro->network); | |
6fbf66fa JY |
369 | return false; |
370 | } | |
371 | ||
512cda46 GD |
372 | static bool |
373 | init_route_ipv6 (struct route_ipv6 *r6, | |
374 | const struct route_ipv6_option *r6o, | |
375 | const struct route_ipv6_list *rl6 ) | |
376 | { | |
512cda46 GD |
377 | r6->defined = false; |
378 | ||
1840c852 | 379 | if ( !get_ipv6_addr( r6o->prefix, &r6->network, &r6->netbits, NULL, M_WARN )) |
512cda46 GD |
380 | goto fail; |
381 | ||
382 | /* gateway */ | |
383 | if (is_route_parm_defined (r6o->gateway)) | |
384 | { | |
385 | if ( inet_pton( AF_INET6, r6o->gateway, &r6->gateway ) != 1 ) | |
386 | { | |
387 | msg( M_WARN, PACKAGE_NAME "ROUTE6: cannot parse gateway spec '%s'", r6o->gateway ); | |
388 | } | |
389 | } | |
390 | else if (rl6->remote_endpoint_defined) | |
391 | { | |
392 | r6->gateway = rl6->remote_endpoint_ipv6; | |
393 | } | |
394 | else | |
395 | { | |
396 | 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"); | |
397 | goto fail; | |
398 | } | |
399 | ||
400 | /* metric */ | |
401 | ||
402 | r6->metric_defined = false; | |
c37d9135 | 403 | r6->metric = -1; |
512cda46 GD |
404 | if (is_route_parm_defined (r6o->metric)) |
405 | { | |
406 | r6->metric = atoi (r6o->metric); | |
407 | if (r6->metric < 0) | |
408 | { | |
409 | msg (M_WARN, PACKAGE_NAME " ROUTE: route metric for network %s (%s) must be >= 0", | |
410 | r6o->prefix, | |
411 | r6o->metric); | |
412 | goto fail; | |
413 | } | |
414 | r6->metric_defined = true; | |
415 | } | |
416 | else if (rl6->default_metric_defined) | |
417 | { | |
418 | r6->metric = rl6->default_metric; | |
419 | r6->metric_defined = true; | |
420 | } | |
421 | ||
422 | r6->defined = true; | |
423 | ||
424 | return true; | |
425 | ||
426 | fail: | |
427 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve route for host/network: %s", | |
428 | r6o->prefix); | |
429 | r6->defined = false; | |
430 | return false; | |
431 | } | |
432 | ||
6fbf66fa JY |
433 | void |
434 | add_route_to_option_list (struct route_option_list *l, | |
435 | const char *network, | |
436 | const char *netmask, | |
437 | const char *gateway, | |
438 | const char *metric) | |
439 | { | |
440 | struct route_option *ro; | |
d0085293 | 441 | ALLOC_OBJ_GC (ro, struct route_option, l->gc); |
6fbf66fa JY |
442 | ro->network = network; |
443 | ro->netmask = netmask; | |
444 | ro->gateway = gateway; | |
445 | ro->metric = metric; | |
d0085293 HH |
446 | ro->next = l->routes; |
447 | l->routes = ro; | |
448 | ||
6fbf66fa JY |
449 | } |
450 | ||
512cda46 GD |
451 | void |
452 | add_route_ipv6_to_option_list (struct route_ipv6_option_list *l, | |
453 | const char *prefix, | |
454 | const char *gateway, | |
455 | const char *metric) | |
456 | { | |
457 | struct route_ipv6_option *ro; | |
d0085293 | 458 | ALLOC_OBJ_GC (ro, struct route_ipv6_option, l->gc); |
512cda46 GD |
459 | ro->prefix = prefix; |
460 | ro->gateway = gateway; | |
461 | ro->metric = metric; | |
d0085293 HH |
462 | ro->next = l->routes_ipv6; |
463 | l->routes_ipv6 = ro; | |
512cda46 GD |
464 | } |
465 | ||
6fbf66fa JY |
466 | void |
467 | clear_route_list (struct route_list *rl) | |
468 | { | |
d0085293 HH |
469 | gc_free (&rl->gc); |
470 | CLEAR (*rl); | |
6fbf66fa JY |
471 | } |
472 | ||
512cda46 GD |
473 | void |
474 | clear_route_ipv6_list (struct route_ipv6_list *rl6) | |
475 | { | |
d0085293 HH |
476 | gc_free (&rl6->gc); |
477 | CLEAR (*rl6); | |
512cda46 GD |
478 | } |
479 | ||
03731db3 | 480 | void |
7fb0e07e JY |
481 | route_list_add_vpn_gateway (struct route_list *rl, |
482 | struct env_set *es, | |
483 | const in_addr_t addr) | |
03731db3 | 484 | { |
eb95f367 | 485 | ASSERT(rl); |
03731db3 | 486 | rl->spec.remote_endpoint = addr; |
7fb0e07e | 487 | rl->spec.flags |= RTSA_REMOTE_ENDPOINT; |
03731db3 JY |
488 | setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1); |
489 | } | |
490 | ||
7fb0e07e JY |
491 | static void |
492 | add_block_local_item (struct route_list *rl, | |
493 | const struct route_gateway_address *gateway, | |
494 | in_addr_t target) | |
495 | { | |
496 | const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED); | |
497 | if ((rl->rgi.flags & rgi_needed) == rgi_needed | |
d0085293 | 498 | && rl->rgi.gateway.netmask < 0xFFFFFFFF) |
7fb0e07e | 499 | { |
d0085293 | 500 | struct route_ipv4 *r1, *r2; |
7fb0e07e JY |
501 | unsigned int l2; |
502 | ||
d0085293 HH |
503 | ALLOC_OBJ_GC (r1, struct route_ipv4, &rl->gc); |
504 | ALLOC_OBJ_GC (r2, struct route_ipv4, &rl->gc); | |
505 | ||
7fb0e07e | 506 | /* split a route into two smaller blocking routes, and direct them to target */ |
7fb0e07e | 507 | l2 = ((~gateway->netmask)+1)>>1; |
d0085293 HH |
508 | r1->flags = RT_DEFINED; |
509 | r1->gateway = target; | |
510 | r1->network = gateway->addr & gateway->netmask; | |
511 | r1->netmask = ~(l2-1); | |
512 | r1->next = rl->routes; | |
513 | rl->routes = r1; | |
514 | ||
515 | *r2 = *r1; | |
516 | r2->network += l2; | |
517 | r2->next = rl->routes; | |
518 | rl->routes = r2; | |
7fb0e07e JY |
519 | } |
520 | } | |
521 | ||
522 | static void | |
523 | add_block_local (struct route_list *rl) | |
524 | { | |
525 | const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED); | |
526 | if ((rl->flags & RG_BLOCK_LOCAL) | |
527 | && (rl->rgi.flags & rgi_needed) == rgi_needed | |
528 | && (rl->spec.flags & RTSA_REMOTE_ENDPOINT) | |
529 | && rl->spec.remote_host_local != TLA_LOCAL) | |
530 | { | |
531 | size_t i; | |
532 | ||
533 | /* add bypass for gateway addr */ | |
534 | add_bypass_address (&rl->spec.bypass, rl->rgi.gateway.addr); | |
535 | ||
536 | /* block access to local subnet */ | |
537 | add_block_local_item (rl, &rl->rgi.gateway, rl->spec.remote_endpoint); | |
538 | ||
539 | /* process additional subnets on gateway interface */ | |
540 | for (i = 0; i < rl->rgi.n_addrs; ++i) | |
541 | { | |
542 | const struct route_gateway_address *gwa = &rl->rgi.addrs[i]; | |
543 | /* omit the add/subnet in &rl->rgi which we processed above */ | |
544 | if (!((rl->rgi.gateway.addr & rl->rgi.gateway.netmask) == (gwa->addr & gwa->netmask) | |
545 | && rl->rgi.gateway.netmask == gwa->netmask)) | |
546 | add_block_local_item (rl, gwa, rl->spec.remote_endpoint); | |
547 | } | |
548 | } | |
549 | } | |
550 | ||
6fbf66fa JY |
551 | bool |
552 | init_route_list (struct route_list *rl, | |
553 | const struct route_option_list *opt, | |
554 | const char *remote_endpoint, | |
40ac3d7a | 555 | int default_metric, |
6fbf66fa JY |
556 | in_addr_t remote_host, |
557 | struct env_set *es) | |
558 | { | |
3c7f2f55 | 559 | struct gc_arena gc = gc_new (); |
6fbf66fa JY |
560 | bool ret = true; |
561 | ||
562 | clear_route_list (rl); | |
563 | ||
3c7f2f55 JY |
564 | rl->flags = opt->flags; |
565 | ||
6fbf66fa JY |
566 | if (remote_host) |
567 | { | |
568 | rl->spec.remote_host = remote_host; | |
7fb0e07e | 569 | rl->spec.flags |= RTSA_REMOTE_HOST; |
6fbf66fa JY |
570 | } |
571 | ||
40ac3d7a JY |
572 | if (default_metric) |
573 | { | |
574 | rl->spec.default_metric = default_metric; | |
7fb0e07e | 575 | rl->spec.flags |= RTSA_DEFAULT_METRIC; |
40ac3d7a JY |
576 | } |
577 | ||
7fb0e07e JY |
578 | get_default_gateway (&rl->rgi); |
579 | if (rl->rgi.flags & RGI_ADDR_DEFINED) | |
6fbf66fa | 580 | { |
7fb0e07e | 581 | setenv_route_addr (es, "net_gateway", rl->rgi.gateway.addr, -1); |
c29e08a2 | 582 | #if defined(ENABLE_DEBUG) && !defined(ENABLE_SMALL) |
7fb0e07e JY |
583 | print_default_gateway (D_ROUTE, &rl->rgi); |
584 | #endif | |
3c7f2f55 | 585 | } |
03653f42 JY |
586 | else |
587 | { | |
775a6ac2 | 588 | dmsg (D_ROUTE, "ROUTE: default_gateway=UNDEF"); |
03653f42 | 589 | } |
3c7f2f55 | 590 | |
7fb0e07e JY |
591 | if (rl->spec.flags & RTSA_REMOTE_HOST) |
592 | rl->spec.remote_host_local = test_local_addr (remote_host, &rl->rgi); | |
6fbf66fa JY |
593 | |
594 | if (is_route_parm_defined (remote_endpoint)) | |
595 | { | |
7fb0e07e | 596 | bool defined = false; |
6fbf66fa JY |
597 | rl->spec.remote_endpoint = getaddr ( |
598 | GETADDR_RESOLVE | |
599 | | GETADDR_HOST_ORDER | |
600 | | GETADDR_WARN_ON_SIGNAL, | |
601 | remote_endpoint, | |
602 | 0, | |
7fb0e07e | 603 | &defined, |
6fbf66fa JY |
604 | NULL); |
605 | ||
7fb0e07e | 606 | if (defined) |
6fbf66fa JY |
607 | { |
608 | setenv_route_addr (es, "vpn_gateway", rl->spec.remote_endpoint, -1); | |
7fb0e07e | 609 | rl->spec.flags |= RTSA_REMOTE_ENDPOINT; |
6fbf66fa JY |
610 | } |
611 | else | |
612 | { | |
613 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s", | |
614 | remote_endpoint); | |
615 | ret = false; | |
616 | } | |
617 | } | |
7fb0e07e JY |
618 | |
619 | if (rl->flags & RG_ENABLE) | |
620 | { | |
621 | add_block_local (rl); | |
622 | get_bypass_addresses (&rl->spec.bypass, rl->flags); | |
623 | #ifdef ENABLE_DEBUG | |
624 | print_bypass_addresses (&rl->spec.bypass); | |
625 | #endif | |
626 | } | |
6fbf66fa | 627 | |
6fbf66fa JY |
628 | /* parse the routes from opt to rl */ |
629 | { | |
d0085293 HH |
630 | struct route_option *ro; |
631 | for (ro = opt->routes; ro; ro = ro->next) | |
6fbf66fa | 632 | { |
f2d6f3bc | 633 | struct addrinfo* netlist; |
b57e005b | 634 | struct route_ipv4 r; |
59afc4a5 | 635 | |
d0085293 | 636 | if (!init_route (&r, &netlist, ro, rl)) |
6fbf66fa JY |
637 | ret = false; |
638 | else | |
f9b2ada0 | 639 | { |
f2d6f3bc | 640 | struct addrinfo* curele; |
e719a053 | 641 | gc_addspecial(netlist, &gc_freeaddrinfo_callback, &gc); |
f2d6f3bc | 642 | for (curele = netlist; curele; curele = curele->ai_next) |
f9b2ada0 | 643 | { |
d0085293 HH |
644 | struct route_ipv4 *new; |
645 | ALLOC_OBJ_GC (new, struct route_ipv4, &rl->gc); | |
646 | *new = r; | |
647 | new->network = ntohl (((struct sockaddr_in*)curele->ai_addr)->sin_addr.s_addr); | |
648 | new->next = rl->routes; | |
649 | rl->routes = new; | |
f9b2ada0 JY |
650 | } |
651 | } | |
6fbf66fa | 652 | } |
6fbf66fa JY |
653 | } |
654 | ||
3c7f2f55 | 655 | gc_free (&gc); |
6fbf66fa JY |
656 | return ret; |
657 | } | |
658 | ||
512cda46 GD |
659 | bool |
660 | init_route_ipv6_list (struct route_ipv6_list *rl6, | |
661 | const struct route_ipv6_option_list *opt6, | |
662 | const char *remote_endpoint, | |
663 | int default_metric, | |
664 | struct env_set *es) | |
665 | { | |
666 | struct gc_arena gc = gc_new (); | |
667 | bool ret = true; | |
668 | ||
669 | clear_route_ipv6_list (rl6); | |
670 | ||
671 | rl6->flags = opt6->flags; | |
672 | ||
c37d9135 | 673 | if (default_metric >= 0 ) |
512cda46 GD |
674 | { |
675 | rl6->default_metric = default_metric; | |
676 | rl6->default_metric_defined = true; | |
677 | } | |
678 | ||
679 | /* "default_gateway" is stuff for "redirect-gateway", which we don't | |
680 | * do for IPv6 yet -> TODO | |
681 | */ | |
682 | { | |
683 | dmsg (D_ROUTE, "ROUTE6: default_gateway=UNDEF"); | |
684 | } | |
685 | ||
686 | if ( is_route_parm_defined( remote_endpoint )) | |
687 | { | |
688 | if ( inet_pton( AF_INET6, remote_endpoint, | |
689 | &rl6->remote_endpoint_ipv6) == 1 ) | |
690 | { | |
691 | rl6->remote_endpoint_defined = true; | |
692 | } | |
693 | else | |
694 | { | |
695 | msg (M_WARN, PACKAGE_NAME " ROUTE: failed to parse/resolve default gateway: %s", remote_endpoint); | |
696 | ret = false; | |
697 | } | |
698 | } | |
699 | else | |
700 | rl6->remote_endpoint_defined = false; | |
701 | ||
702 | ||
d0085293 | 703 | /* parse the routes from opt6 to rl6 */ |
512cda46 | 704 | { |
d0085293 HH |
705 | struct route_ipv6_option *ro6; |
706 | for (ro6 = opt6->routes_ipv6; ro6; ro6 = ro6->next) | |
512cda46 | 707 | { |
d0085293 HH |
708 | struct route_ipv6 *r6; |
709 | ALLOC_OBJ_GC (r6, struct route_ipv6, &rl6->gc); | |
710 | if (!init_route_ipv6 (r6, ro6, rl6)) | |
512cda46 GD |
711 | ret = false; |
712 | else | |
d0085293 HH |
713 | { |
714 | r6->next = rl6->routes_ipv6; | |
715 | rl6->routes_ipv6 = r6; | |
716 | } | |
512cda46 | 717 | } |
512cda46 GD |
718 | } |
719 | ||
720 | gc_free (&gc); | |
721 | return ret; | |
722 | } | |
723 | ||
6fbf66fa JY |
724 | static void |
725 | add_route3 (in_addr_t network, | |
726 | in_addr_t netmask, | |
727 | in_addr_t gateway, | |
728 | const struct tuntap *tt, | |
729 | unsigned int flags, | |
7fb0e07e | 730 | const struct route_gateway_info *rgi, |
6fbf66fa JY |
731 | const struct env_set *es) |
732 | { | |
b57e005b | 733 | struct route_ipv4 r; |
6fbf66fa | 734 | CLEAR (r); |
7fb0e07e | 735 | r.flags = RT_DEFINED; |
6fbf66fa JY |
736 | r.network = network; |
737 | r.netmask = netmask; | |
738 | r.gateway = gateway; | |
7fb0e07e | 739 | add_route (&r, tt, flags, rgi, es); |
6fbf66fa JY |
740 | } |
741 | ||
742 | static void | |
743 | del_route3 (in_addr_t network, | |
744 | in_addr_t netmask, | |
745 | in_addr_t gateway, | |
746 | const struct tuntap *tt, | |
747 | unsigned int flags, | |
7fb0e07e | 748 | const struct route_gateway_info *rgi, |
6fbf66fa JY |
749 | const struct env_set *es) |
750 | { | |
b57e005b | 751 | struct route_ipv4 r; |
6fbf66fa | 752 | CLEAR (r); |
7fb0e07e | 753 | r.flags = RT_DEFINED|RT_ADDED; |
6fbf66fa JY |
754 | r.network = network; |
755 | r.netmask = netmask; | |
756 | r.gateway = gateway; | |
7fb0e07e | 757 | delete_route (&r, tt, flags, rgi, es); |
6fbf66fa JY |
758 | } |
759 | ||
3c7f2f55 JY |
760 | static void |
761 | add_bypass_routes (struct route_bypass *rb, | |
762 | in_addr_t gateway, | |
763 | const struct tuntap *tt, | |
764 | unsigned int flags, | |
7fb0e07e | 765 | const struct route_gateway_info *rgi, |
3c7f2f55 JY |
766 | const struct env_set *es) |
767 | { | |
768 | int i; | |
769 | for (i = 0; i < rb->n_bypass; ++i) | |
770 | { | |
7fb0e07e | 771 | if (rb->bypass[i]) |
3c7f2f55 | 772 | add_route3 (rb->bypass[i], |
32e576d2 | 773 | IPV4_NETMASK_HOST, |
3c7f2f55 JY |
774 | gateway, |
775 | tt, | |
8fc83a2d | 776 | flags | ROUTE_REF_GW, |
7fb0e07e | 777 | rgi, |
3c7f2f55 JY |
778 | es); |
779 | } | |
780 | } | |
781 | ||
782 | static void | |
783 | del_bypass_routes (struct route_bypass *rb, | |
784 | in_addr_t gateway, | |
785 | const struct tuntap *tt, | |
786 | unsigned int flags, | |
7fb0e07e | 787 | const struct route_gateway_info *rgi, |
3c7f2f55 JY |
788 | const struct env_set *es) |
789 | { | |
790 | int i; | |
791 | for (i = 0; i < rb->n_bypass; ++i) | |
792 | { | |
7fb0e07e | 793 | if (rb->bypass[i]) |
3c7f2f55 | 794 | del_route3 (rb->bypass[i], |
32e576d2 | 795 | IPV4_NETMASK_HOST, |
3c7f2f55 JY |
796 | gateway, |
797 | tt, | |
8fc83a2d | 798 | flags | ROUTE_REF_GW, |
7fb0e07e | 799 | rgi, |
3c7f2f55 JY |
800 | es); |
801 | } | |
802 | } | |
803 | ||
6fbf66fa JY |
804 | static void |
805 | redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
806 | { | |
807 | const char err[] = "NOTE: unable to redirect default gateway --"; | |
808 | ||
f0257abb | 809 | if ( rl && rl->flags & RG_ENABLE ) |
6fbf66fa | 810 | { |
7fb0e07e | 811 | if (!(rl->spec.flags & RTSA_REMOTE_ENDPOINT)) |
6fbf66fa JY |
812 | { |
813 | msg (M_WARN, "%s VPN gateway parameter (--route-gateway or --ifconfig) is missing", err); | |
814 | } | |
7fb0e07e | 815 | else if (!(rl->rgi.flags & RGI_ADDR_DEFINED)) |
6fbf66fa JY |
816 | { |
817 | msg (M_WARN, "%s Cannot read current default gateway from system", err); | |
818 | } | |
7fb0e07e | 819 | else if (!(rl->spec.flags & RTSA_REMOTE_HOST)) |
6fbf66fa JY |
820 | { |
821 | msg (M_WARN, "%s Cannot obtain current remote host address", err); | |
822 | } | |
823 | else | |
824 | { | |
775a6ac2 JY |
825 | bool local = BOOL_CAST(rl->flags & RG_LOCAL); |
826 | if (rl->flags & RG_AUTO_LOCAL) { | |
7fb0e07e | 827 | const int tla = rl->spec.remote_host_local; |
775a6ac2 JY |
828 | if (tla == TLA_NONLOCAL) |
829 | { | |
830 | dmsg (D_ROUTE, "ROUTE remote_host is NOT LOCAL"); | |
831 | local = false; | |
832 | } | |
833 | else if (tla == TLA_LOCAL) | |
834 | { | |
835 | dmsg (D_ROUTE, "ROUTE remote_host is LOCAL"); | |
836 | local = true; | |
837 | } | |
838 | } | |
839 | if (!local) | |
840 | { | |
841 | /* route remote host to original default gateway */ | |
6caf7f3d JC |
842 | /* if remote_host is not ipv4 (ie: ipv6), just skip |
843 | * adding this special /32 route */ | |
9d4c64b5 | 844 | if (rl->spec.remote_host != IPV4_INVALID_ADDR) { |
efa85c8b | 845 | add_route3 (rl->spec.remote_host, |
32e576d2 | 846 | IPV4_NETMASK_HOST, |
576dc96c | 847 | rl->rgi.gateway.addr, |
efa85c8b | 848 | tt, |
8fc83a2d | 849 | flags | ROUTE_REF_GW, |
576dc96c | 850 | &rl->rgi, |
efa85c8b | 851 | es); |
576dc96c | 852 | rl->iflags |= RL_DID_LOCAL; |
efa85c8b JC |
853 | } else { |
854 | dmsg (D_ROUTE, "ROUTE remote_host protocol differs from tunneled"); | |
855 | } | |
775a6ac2 | 856 | } |
6fbf66fa | 857 | |
3c7f2f55 | 858 | /* route DHCP/DNS server traffic through original default gateway */ |
7fb0e07e | 859 | add_bypass_routes (&rl->spec.bypass, rl->rgi.gateway.addr, tt, flags, &rl->rgi, es); |
3c7f2f55 | 860 | |
b723833b JY |
861 | if (rl->flags & RG_REROUTE_GW) |
862 | { | |
863 | if (rl->flags & RG_DEF1) | |
864 | { | |
865 | /* add new default route (1st component) */ | |
866 | add_route3 (0x00000000, | |
867 | 0x80000000, | |
868 | rl->spec.remote_endpoint, | |
869 | tt, | |
870 | flags, | |
7fb0e07e | 871 | &rl->rgi, |
b723833b JY |
872 | es); |
873 | ||
874 | /* add new default route (2nd component) */ | |
875 | add_route3 (0x80000000, | |
876 | 0x80000000, | |
877 | rl->spec.remote_endpoint, | |
878 | tt, | |
879 | flags, | |
7fb0e07e | 880 | &rl->rgi, |
b723833b JY |
881 | es); |
882 | } | |
883 | else | |
884 | { | |
885 | /* delete default route */ | |
886 | del_route3 (0, | |
887 | 0, | |
7fb0e07e | 888 | rl->rgi.gateway.addr, |
b723833b | 889 | tt, |
8fc83a2d | 890 | flags | ROUTE_REF_GW, |
7fb0e07e | 891 | &rl->rgi, |
b723833b JY |
892 | es); |
893 | ||
894 | /* add new default route */ | |
895 | add_route3 (0, | |
896 | 0, | |
897 | rl->spec.remote_endpoint, | |
898 | tt, | |
899 | flags, | |
7fb0e07e | 900 | &rl->rgi, |
b723833b JY |
901 | es); |
902 | } | |
903 | } | |
904 | ||
905 | /* set a flag so we can undo later */ | |
7fb0e07e | 906 | rl->iflags |= RL_DID_REDIRECT_DEFAULT_GATEWAY; |
b723833b JY |
907 | } |
908 | } | |
909 | } | |
910 | ||
911 | static void | |
912 | undo_redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
913 | { | |
f0257abb | 914 | if ( rl && rl->iflags & RL_DID_REDIRECT_DEFAULT_GATEWAY ) |
b723833b JY |
915 | { |
916 | /* delete remote host route */ | |
7fb0e07e | 917 | if (rl->iflags & RL_DID_LOCAL) |
775a6ac2 JY |
918 | { |
919 | del_route3 (rl->spec.remote_host, | |
32e576d2 | 920 | IPV4_NETMASK_HOST, |
7fb0e07e | 921 | rl->rgi.gateway.addr, |
775a6ac2 | 922 | tt, |
8fc83a2d | 923 | flags | ROUTE_REF_GW, |
7fb0e07e | 924 | &rl->rgi, |
775a6ac2 | 925 | es); |
7fb0e07e | 926 | rl->iflags &= ~RL_DID_LOCAL; |
775a6ac2 | 927 | } |
b723833b JY |
928 | |
929 | /* delete special DHCP/DNS bypass route */ | |
7fb0e07e | 930 | del_bypass_routes (&rl->spec.bypass, rl->rgi.gateway.addr, tt, flags, &rl->rgi, es); |
b723833b JY |
931 | |
932 | if (rl->flags & RG_REROUTE_GW) | |
933 | { | |
3c7f2f55 | 934 | if (rl->flags & RG_DEF1) |
6fbf66fa | 935 | { |
b723833b JY |
936 | /* delete default route (1st component) */ |
937 | del_route3 (0x00000000, | |
6fbf66fa JY |
938 | 0x80000000, |
939 | rl->spec.remote_endpoint, | |
940 | tt, | |
941 | flags, | |
7fb0e07e | 942 | &rl->rgi, |
6fbf66fa JY |
943 | es); |
944 | ||
b723833b JY |
945 | /* delete default route (2nd component) */ |
946 | del_route3 (0x80000000, | |
6fbf66fa JY |
947 | 0x80000000, |
948 | rl->spec.remote_endpoint, | |
949 | tt, | |
950 | flags, | |
7fb0e07e | 951 | &rl->rgi, |
6fbf66fa JY |
952 | es); |
953 | } | |
954 | else | |
955 | { | |
956 | /* delete default route */ | |
957 | del_route3 (0, | |
958 | 0, | |
b723833b | 959 | rl->spec.remote_endpoint, |
6fbf66fa JY |
960 | tt, |
961 | flags, | |
7fb0e07e | 962 | &rl->rgi, |
6fbf66fa JY |
963 | es); |
964 | ||
b723833b | 965 | /* restore original default route */ |
6fbf66fa JY |
966 | add_route3 (0, |
967 | 0, | |
7fb0e07e | 968 | rl->rgi.gateway.addr, |
6fbf66fa | 969 | tt, |
8fc83a2d | 970 | flags | ROUTE_REF_GW, |
7fb0e07e | 971 | &rl->rgi, |
6fbf66fa JY |
972 | es); |
973 | } | |
6fbf66fa JY |
974 | } |
975 | ||
7fb0e07e | 976 | rl->iflags &= ~RL_DID_REDIRECT_DEFAULT_GATEWAY; |
6fbf66fa JY |
977 | } |
978 | } | |
979 | ||
980 | void | |
576dc96c | 981 | add_routes (struct route_list *rl, struct route_ipv6_list *rl6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) |
6fbf66fa | 982 | { |
d02a86d3 | 983 | redirect_default_route_to_vpn (rl, tt, flags, es); |
f0257abb | 984 | if ( rl && !(rl->iflags & RL_ROUTES_ADDED) ) |
6fbf66fa | 985 | { |
d0085293 | 986 | struct route_ipv4 *r; |
6fbf66fa JY |
987 | |
988 | #ifdef ENABLE_MANAGEMENT | |
d0085293 | 989 | if (management && rl->routes) |
6fbf66fa JY |
990 | { |
991 | management_set_state (management, | |
992 | OPENVPN_STATE_ADD_ROUTES, | |
993 | NULL, | |
5ad84585 | 994 | 0, |
6fbf66fa JY |
995 | 0); |
996 | } | |
997 | #endif | |
d0085293 HH |
998 | |
999 | for (r = rl->routes; r; r = r->next) | |
6fbf66fa | 1000 | { |
f77c60d3 | 1001 | check_subnet_conflict (r->network, r->netmask, "route"); |
6fbf66fa | 1002 | if (flags & ROUTE_DELETE_FIRST) |
7fb0e07e JY |
1003 | delete_route (r, tt, flags, &rl->rgi, es); |
1004 | add_route (r, tt, flags, &rl->rgi, es); | |
6fbf66fa | 1005 | } |
7fb0e07e | 1006 | rl->iflags |= RL_ROUTES_ADDED; |
6fbf66fa | 1007 | } |
512cda46 GD |
1008 | if (rl6 && !rl6->routes_added) |
1009 | { | |
d0085293 HH |
1010 | struct route_ipv6 *r; |
1011 | for (r = rl6->routes_ipv6; r; r = r->next) | |
512cda46 | 1012 | { |
512cda46 GD |
1013 | if (flags & ROUTE_DELETE_FIRST) |
1014 | delete_route_ipv6 (r, tt, flags, es); | |
1015 | add_route_ipv6 (r, tt, flags, es); | |
1016 | } | |
1017 | rl6->routes_added = true; | |
1018 | } | |
6fbf66fa JY |
1019 | } |
1020 | ||
1021 | void | |
512cda46 GD |
1022 | delete_routes (struct route_list *rl, struct route_ipv6_list *rl6, |
1023 | const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
6fbf66fa | 1024 | { |
f0257abb | 1025 | if ( rl && rl->iflags & RL_ROUTES_ADDED ) |
6fbf66fa | 1026 | { |
d0085293 HH |
1027 | struct route_ipv4 *r; |
1028 | for (r = rl->routes; r; r = r->next) | |
6fbf66fa | 1029 | { |
7fb0e07e | 1030 | delete_route (r, tt, flags, &rl->rgi, es); |
6fbf66fa | 1031 | } |
7fb0e07e | 1032 | rl->iflags &= ~RL_ROUTES_ADDED; |
6fbf66fa | 1033 | } |
6fbf66fa | 1034 | |
576dc96c | 1035 | undo_redirect_default_route_to_vpn (rl, tt, flags, es); |
f0257abb GD |
1036 | |
1037 | if ( rl ) | |
1038 | { | |
1039 | clear_route_list (rl); | |
1040 | } | |
512cda46 GD |
1041 | |
1042 | if ( rl6 && rl6->routes_added ) | |
1043 | { | |
d0085293 HH |
1044 | struct route_ipv6 *r6; |
1045 | for (r6 = rl6->routes_ipv6; r6; r6 = r6->next) | |
512cda46 | 1046 | { |
512cda46 GD |
1047 | delete_route_ipv6 (r6, tt, flags, es); |
1048 | } | |
1049 | rl6->routes_added = false; | |
1050 | } | |
1051 | ||
1052 | if ( rl6 ) | |
1053 | { | |
1054 | clear_route_ipv6_list (rl6); | |
1055 | } | |
6fbf66fa JY |
1056 | } |
1057 | ||
6c61d0dd | 1058 | #ifndef ENABLE_SMALL |
6fbf66fa JY |
1059 | |
1060 | static const char * | |
1061 | show_opt (const char *option) | |
1062 | { | |
1063 | if (!option) | |
1064 | return "nil"; | |
1065 | else | |
1066 | return option; | |
1067 | } | |
1068 | ||
1069 | static void | |
1070 | print_route_option (const struct route_option *ro, int level) | |
1071 | { | |
1072 | msg (level, " route %s/%s/%s/%s", | |
1073 | show_opt (ro->network), | |
1074 | show_opt (ro->netmask), | |
1075 | show_opt (ro->gateway), | |
1076 | show_opt (ro->metric)); | |
1077 | } | |
1078 | ||
1079 | void | |
1080 | print_route_options (const struct route_option_list *rol, | |
1081 | int level) | |
1082 | { | |
d0085293 | 1083 | struct route_option *ro; |
3c7f2f55 | 1084 | if (rol->flags & RG_ENABLE) |
6fbf66fa | 1085 | msg (level, " [redirect_default_gateway local=%d]", |
3c7f2f55 | 1086 | (rol->flags & RG_LOCAL) != 0); |
d0085293 HH |
1087 | for (ro = rol->routes; ro; ro = ro->next) |
1088 | print_route_option (ro, level); | |
6fbf66fa JY |
1089 | } |
1090 | ||
7fb0e07e JY |
1091 | void |
1092 | print_default_gateway(const int msglevel, const struct route_gateway_info *rgi) | |
1093 | { | |
1094 | struct gc_arena gc = gc_new (); | |
1095 | if (rgi->flags & RGI_ADDR_DEFINED) | |
1096 | { | |
1097 | struct buffer out = alloc_buf_gc (256, &gc); | |
1098 | buf_printf (&out, "ROUTE_GATEWAY"); | |
8fc83a2d JY |
1099 | if (rgi->flags & RGI_ON_LINK) |
1100 | buf_printf (&out, " ON_LINK"); | |
1101 | else | |
1102 | buf_printf (&out, " %s", print_in_addr_t (rgi->gateway.addr, 0, &gc)); | |
7fb0e07e JY |
1103 | if (rgi->flags & RGI_NETMASK_DEFINED) |
1104 | buf_printf (&out, "/%s", print_in_addr_t (rgi->gateway.netmask, 0, &gc)); | |
1105 | #ifdef WIN32 | |
1106 | if (rgi->flags & RGI_IFACE_DEFINED) | |
1107 | buf_printf (&out, " I=%u", (unsigned int)rgi->adapter_index); | |
1108 | #else | |
1109 | if (rgi->flags & RGI_IFACE_DEFINED) | |
1110 | buf_printf (&out, " IFACE=%s", rgi->iface); | |
1111 | #endif | |
1112 | if (rgi->flags & RGI_HWADDR_DEFINED) | |
1113 | buf_printf (&out, " HWADDR=%s", format_hex_ex (rgi->hwaddr, 6, 0, 1, ":", &gc)); | |
1114 | msg (msglevel, "%s", BSTR (&out)); | |
1115 | } | |
1116 | gc_free (&gc); | |
1117 | } | |
1118 | ||
6fbf66fa JY |
1119 | #endif |
1120 | ||
1121 | static void | |
b57e005b | 1122 | print_route (const struct route_ipv4 *r, int level) |
6fbf66fa JY |
1123 | { |
1124 | struct gc_arena gc = gc_new (); | |
7fb0e07e | 1125 | if (r->flags & RT_DEFINED) |
6fbf66fa JY |
1126 | msg (level, "%s", route_string (r, &gc)); |
1127 | gc_free (&gc); | |
1128 | } | |
1129 | ||
1130 | void | |
1131 | print_routes (const struct route_list *rl, int level) | |
1132 | { | |
d0085293 HH |
1133 | struct route_ipv4 *r; |
1134 | for (r = rl->routes; r; r = r->next) | |
1135 | print_route (r, level); | |
6fbf66fa JY |
1136 | } |
1137 | ||
1138 | static void | |
b57e005b | 1139 | setenv_route (struct env_set *es, const struct route_ipv4 *r, int i) |
6fbf66fa JY |
1140 | { |
1141 | struct gc_arena gc = gc_new (); | |
7fb0e07e | 1142 | if (r->flags & RT_DEFINED) |
6fbf66fa JY |
1143 | { |
1144 | setenv_route_addr (es, "network", r->network, i); | |
1145 | setenv_route_addr (es, "netmask", r->netmask, i); | |
1146 | setenv_route_addr (es, "gateway", r->gateway, i); | |
1147 | ||
7fb0e07e | 1148 | if (r->flags & RT_METRIC_DEFINED) |
6fbf66fa JY |
1149 | { |
1150 | struct buffer name = alloc_buf_gc (256, &gc); | |
1151 | buf_printf (&name, "route_metric_%d", i); | |
1152 | setenv_int (es, BSTR (&name), r->metric); | |
1153 | } | |
1154 | } | |
1155 | gc_free (&gc); | |
1156 | } | |
1157 | ||
1158 | void | |
1159 | setenv_routes (struct env_set *es, const struct route_list *rl) | |
1160 | { | |
d0085293 HH |
1161 | int i = 1; |
1162 | struct route_ipv4 *r; | |
1163 | for (r = rl->routes; r; r = r->next) | |
1164 | setenv_route (es, r, i++); | |
6fbf66fa JY |
1165 | } |
1166 | ||
512cda46 GD |
1167 | static void |
1168 | setenv_route_ipv6 (struct env_set *es, const struct route_ipv6 *r6, int i) | |
1169 | { | |
1170 | struct gc_arena gc = gc_new (); | |
1171 | if (r6->defined) | |
1172 | { | |
1173 | struct buffer name1 = alloc_buf_gc( 256, &gc ); | |
1174 | struct buffer val = alloc_buf_gc( 256, &gc ); | |
1175 | struct buffer name2 = alloc_buf_gc( 256, &gc ); | |
1176 | ||
1177 | buf_printf( &name1, "route_ipv6_network_%d", i ); | |
1178 | buf_printf( &val, "%s/%d", print_in6_addr( r6->network, 0, &gc ), | |
1179 | r6->netbits ); | |
1180 | setenv_str( es, BSTR(&name1), BSTR(&val) ); | |
1181 | ||
1182 | buf_printf( &name2, "route_ipv6_gateway_%d", i ); | |
1183 | setenv_str( es, BSTR(&name2), print_in6_addr( r6->gateway, 0, &gc )); | |
1184 | } | |
1185 | gc_free (&gc); | |
1186 | } | |
1187 | void | |
1188 | setenv_routes_ipv6 (struct env_set *es, const struct route_ipv6_list *rl6) | |
1189 | { | |
d0085293 HH |
1190 | int i = 1; |
1191 | struct route_ipv6 *r6; | |
1192 | for (r6 = rl6->routes_ipv6; r6; r6 = r6->next) | |
1193 | setenv_route_ipv6 (es, r6, i++); | |
512cda46 GD |
1194 | } |
1195 | ||
7fb0e07e JY |
1196 | /* |
1197 | * local_route() determines whether the gateway of a provided host | |
1198 | * route is on the same interface that owns the default gateway. | |
1199 | * It uses the data structure | |
1200 | * returned by get_default_gateway() (struct route_gateway_info) | |
1201 | * to determine this. If the route is local, LR_MATCH is returned. | |
1202 | * When adding routes into the kernel, if LR_MATCH is defined for | |
1203 | * a given route, the route should explicitly reference the default | |
1204 | * gateway interface as the route destination. For example, here | |
1205 | * is an example on Linux that uses LR_MATCH: | |
1206 | * | |
576dc96c | 1207 | * route add -net 10.10.0.1 netmask 255.255.255.255 dev eth0 |
7fb0e07e JY |
1208 | * |
1209 | * This capability is needed by the "default-gateway block-local" | |
1210 | * directive, to allow client access to the local subnet to be | |
1211 | * blocked but still allow access to the local default gateway. | |
1212 | */ | |
1213 | ||
1214 | /* local_route() return values */ | |
1215 | #define LR_NOMATCH 0 /* route is not local */ | |
1216 | #define LR_MATCH 1 /* route is local */ | |
1217 | #define LR_ERROR 2 /* caller should abort adding route */ | |
1218 | ||
1219 | static int | |
1220 | local_route (in_addr_t network, | |
1221 | in_addr_t netmask, | |
1222 | in_addr_t gateway, | |
1223 | const struct route_gateway_info *rgi) | |
1224 | { | |
1225 | /* set LR_MATCH on local host routes */ | |
1226 | const int rgi_needed = (RGI_ADDR_DEFINED|RGI_NETMASK_DEFINED|RGI_IFACE_DEFINED); | |
1227 | if (rgi | |
1228 | && (rgi->flags & rgi_needed) == rgi_needed | |
1229 | && gateway == rgi->gateway.addr | |
1230 | && netmask == 0xFFFFFFFF) | |
1231 | { | |
1232 | if (((network ^ rgi->gateway.addr) & rgi->gateway.netmask) == 0) | |
1233 | return LR_MATCH; | |
1234 | else | |
1235 | { | |
1236 | /* examine additional subnets on gateway interface */ | |
1237 | size_t i; | |
1238 | for (i = 0; i < rgi->n_addrs; ++i) | |
1239 | { | |
1240 | const struct route_gateway_address *gwa = &rgi->addrs[i]; | |
1241 | if (((network ^ gwa->addr) & gwa->netmask) == 0) | |
1242 | return LR_MATCH; | |
1243 | } | |
1244 | } | |
1245 | } | |
1246 | return LR_NOMATCH; | |
1247 | } | |
1248 | ||
8fc83a2d JY |
1249 | /* Return true if the "on-link" form of the route should be used. This is when the gateway for a |
1250 | a route is specified as an interface rather than an address. */ | |
1251 | static inline bool | |
1252 | is_on_link (const int is_local_route, const unsigned int flags, const struct route_gateway_info *rgi) | |
1253 | { | |
1254 | return rgi && (is_local_route == LR_MATCH || ((flags & ROUTE_REF_GW) && (rgi->flags & RGI_ON_LINK))); | |
1255 | } | |
1256 | ||
6d5d1010 | 1257 | void |
b57e005b | 1258 | add_route (struct route_ipv4 *r, |
7fb0e07e JY |
1259 | const struct tuntap *tt, |
1260 | unsigned int flags, | |
1261 | const struct route_gateway_info *rgi, /* may be NULL */ | |
1262 | const struct env_set *es) | |
6fbf66fa JY |
1263 | { |
1264 | struct gc_arena gc; | |
5a2e9a25 | 1265 | struct argv argv; |
6fbf66fa JY |
1266 | const char *network; |
1267 | const char *netmask; | |
1268 | const char *gateway; | |
1269 | bool status = false; | |
7fb0e07e | 1270 | int is_local_route; |
6fbf66fa | 1271 | |
7fb0e07e | 1272 | if (!(r->flags & RT_DEFINED)) |
6fbf66fa JY |
1273 | return; |
1274 | ||
1275 | gc_init (&gc); | |
5a2e9a25 | 1276 | argv_init (&argv); |
6fbf66fa JY |
1277 | |
1278 | network = print_in_addr_t (r->network, 0, &gc); | |
1279 | netmask = print_in_addr_t (r->netmask, 0, &gc); | |
1280 | gateway = print_in_addr_t (r->gateway, 0, &gc); | |
1281 | ||
7fb0e07e JY |
1282 | is_local_route = local_route(r->network, r->netmask, r->gateway, rgi); |
1283 | if (is_local_route == LR_ERROR) | |
1284 | goto done; | |
6fbf66fa JY |
1285 | |
1286 | #if defined(TARGET_LINUX) | |
51bd56f4 | 1287 | #ifdef ENABLE_IPROUTE |
baa195b9 | 1288 | argv_printf (&argv, "%s route add %s/%d", |
0aee9ca7 | 1289 | iproute_path, |
6fbf66fa | 1290 | network, |
baa195b9 PH |
1291 | count_netmask_bits(netmask)); |
1292 | ||
7fb0e07e | 1293 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1294 | argv_printf_cat (&argv, "metric %d", r->metric); |
6fbf66fa | 1295 | |
baa195b9 PH |
1296 | if (is_on_link (is_local_route, flags, rgi)) |
1297 | argv_printf_cat (&argv, "dev %s", rgi->iface); | |
1298 | else | |
1299 | argv_printf_cat (&argv, "via %s", gateway); | |
6fbf66fa | 1300 | #else |
7fb0e07e JY |
1301 | argv_printf (&argv, "%s add -net %s netmask %s", |
1302 | ROUTE_PATH, | |
1303 | network, | |
1304 | netmask); | |
1305 | if (r->flags & RT_METRIC_DEFINED) | |
5a2e9a25 | 1306 | argv_printf_cat (&argv, "metric %d", r->metric); |
8fc83a2d | 1307 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e JY |
1308 | argv_printf_cat (&argv, "dev %s", rgi->iface); |
1309 | else | |
1310 | argv_printf_cat (&argv, "gw %s", gateway); | |
1311 | ||
51bd56f4 | 1312 | #endif /*ENABLE_IPROUTE*/ |
5a2e9a25 JY |
1313 | argv_msg (D_ROUTE, &argv); |
1314 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route add command failed"); | |
6fbf66fa | 1315 | |
a55b3cdb | 1316 | #elif defined (TARGET_ANDROID) |
05660e78 | 1317 | struct buffer out = alloc_buf_gc (128, &gc); |
a55b3cdb | 1318 | |
05660e78 AS |
1319 | if (rgi) |
1320 | buf_printf (&out, "%s %s %s dev %s", network, netmask, gateway, rgi->iface); | |
1321 | else | |
1322 | buf_printf (&out, "%s %s %s", network, netmask, gateway); | |
a55b3cdb AS |
1323 | management_android_control (management, "ROUTE", buf_bptr(&out)); |
1324 | ||
6fbf66fa | 1325 | #elif defined (WIN32) |
7fb0e07e | 1326 | { |
12e46092 | 1327 | DWORD ai = TUN_ADAPTER_INDEX_INVALID; |
7fb0e07e JY |
1328 | argv_printf (&argv, "%s%sc ADD %s MASK %s %s", |
1329 | get_win_sys_path(), | |
1330 | WIN_ROUTE_PATH_SUFFIX, | |
1331 | network, | |
1332 | netmask, | |
1333 | gateway); | |
1334 | if (r->flags & RT_METRIC_DEFINED) | |
1335 | argv_printf_cat (&argv, "METRIC %d", r->metric); | |
8fc83a2d | 1336 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e JY |
1337 | { |
1338 | ai = rgi->adapter_index; | |
1339 | argv_printf_cat (&argv, "IF %u", (unsigned int)ai); | |
1340 | } | |
6fbf66fa | 1341 | |
7fb0e07e | 1342 | argv_msg (D_ROUTE, &argv); |
6fbf66fa | 1343 | |
7fb0e07e JY |
1344 | if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI) |
1345 | { | |
1346 | status = add_route_ipapi (r, tt, ai); | |
1347 | msg (D_ROUTE, "Route addition via IPAPI %s", status ? "succeeded" : "failed"); | |
1348 | } | |
1349 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE) | |
1350 | { | |
1351 | netcmd_semaphore_lock (); | |
1352 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed"); | |
1353 | netcmd_semaphore_release (); | |
1354 | } | |
1355 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE) | |
1356 | { | |
1357 | status = add_route_ipapi (r, tt, ai); | |
1358 | msg (D_ROUTE, "Route addition via IPAPI %s [adaptive]", status ? "succeeded" : "failed"); | |
1359 | if (!status) | |
1360 | { | |
1361 | msg (D_ROUTE, "Route addition fallback to route.exe"); | |
1362 | netcmd_semaphore_lock (); | |
1363 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add command failed [adaptive]"); | |
1364 | netcmd_semaphore_release (); | |
1365 | } | |
1366 | } | |
1367 | else | |
1368 | { | |
1369 | ASSERT (0); | |
1370 | } | |
1371 | } | |
6fbf66fa JY |
1372 | |
1373 | #elif defined (TARGET_SOLARIS) | |
1374 | ||
1375 | /* example: route add 192.0.2.32 -netmask 255.255.255.224 somegateway */ | |
1376 | ||
5a2e9a25 JY |
1377 | argv_printf (&argv, "%s add", |
1378 | ROUTE_PATH); | |
6fbf66fa | 1379 | |
5a2e9a25 | 1380 | argv_printf_cat (&argv, "%s -netmask %s %s", |
6fbf66fa JY |
1381 | network, |
1382 | netmask, | |
1383 | gateway); | |
1384 | ||
792e8956 GD |
1385 | /* Solaris can only distinguish between "metric 0" == "on-link on the |
1386 | * interface where the IP address given is configured" and "metric > 0" | |
1387 | * == "use gateway specified" (no finer-grained route metrics available) | |
1388 | * | |
1389 | * More recent versions of Solaris can also do "-interface", but that | |
1390 | * would break backwards compatibility with older versions for no gain. | |
1391 | */ | |
1392 | if (r->flags & RT_METRIC_DEFINED ) | |
1393 | argv_printf_cat (&argv, "%d", r->metric); | |
f0eac1a5 | 1394 | |
5a2e9a25 JY |
1395 | argv_msg (D_ROUTE, &argv); |
1396 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add command failed"); | |
6fbf66fa JY |
1397 | |
1398 | #elif defined(TARGET_FREEBSD) | |
1399 | ||
5a2e9a25 JY |
1400 | argv_printf (&argv, "%s add", |
1401 | ROUTE_PATH); | |
6fbf66fa JY |
1402 | |
1403 | #if 0 | |
7fb0e07e | 1404 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1405 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
6fbf66fa JY |
1406 | #endif |
1407 | ||
5a2e9a25 | 1408 | argv_printf_cat (&argv, "-net %s %s %s", |
6fbf66fa JY |
1409 | network, |
1410 | gateway, | |
1411 | netmask); | |
1412 | ||
8fc83a2d | 1413 | /* FIXME -- add on-link support for FreeBSD */ |
7fb0e07e | 1414 | |
5a2e9a25 JY |
1415 | argv_msg (D_ROUTE, &argv); |
1416 | status = openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route add command failed"); | |
6fbf66fa | 1417 | |
1bda73a7 JY |
1418 | #elif defined(TARGET_DRAGONFLY) |
1419 | ||
5a2e9a25 JY |
1420 | argv_printf (&argv, "%s add", |
1421 | ROUTE_PATH); | |
1bda73a7 JY |
1422 | |
1423 | #if 0 | |
7fb0e07e | 1424 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1425 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
1bda73a7 JY |
1426 | #endif |
1427 | ||
5a2e9a25 | 1428 | argv_printf_cat (&argv, "-net %s %s %s", |
1bda73a7 JY |
1429 | network, |
1430 | gateway, | |
1431 | netmask); | |
1432 | ||
8fc83a2d | 1433 | /* FIXME -- add on-link support for Dragonfly */ |
7fb0e07e | 1434 | |
5a2e9a25 JY |
1435 | argv_msg (D_ROUTE, &argv); |
1436 | status = openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route add command failed"); | |
1bda73a7 | 1437 | |
6fbf66fa JY |
1438 | #elif defined(TARGET_DARWIN) |
1439 | ||
5a2e9a25 JY |
1440 | argv_printf (&argv, "%s add", |
1441 | ROUTE_PATH); | |
6fbf66fa JY |
1442 | |
1443 | #if 0 | |
7fb0e07e | 1444 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1445 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
6fbf66fa JY |
1446 | #endif |
1447 | ||
8fc83a2d | 1448 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e | 1449 | { |
8fc83a2d | 1450 | /* Mac OS X route syntax for ON_LINK: |
7fb0e07e JY |
1451 | route add -cloning -net 10.10.0.1 -netmask 255.255.255.255 -interface en0 */ |
1452 | argv_printf_cat (&argv, "-cloning -net %s -netmask %s -interface %s", | |
1453 | network, | |
1454 | netmask, | |
1455 | rgi->iface); | |
1456 | } | |
1457 | else | |
1458 | { | |
1459 | argv_printf_cat (&argv, "-net %s %s %s", | |
1460 | network, | |
1461 | gateway, | |
1462 | netmask); | |
1463 | } | |
6fbf66fa | 1464 | |
5a2e9a25 JY |
1465 | argv_msg (D_ROUTE, &argv); |
1466 | status = openvpn_execve_check (&argv, es, 0, "ERROR: OS X route add command failed"); | |
6fbf66fa JY |
1467 | |
1468 | #elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) | |
1469 | ||
5a2e9a25 JY |
1470 | argv_printf (&argv, "%s add", |
1471 | ROUTE_PATH); | |
6fbf66fa JY |
1472 | |
1473 | #if 0 | |
7fb0e07e | 1474 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 | 1475 | argv_printf_cat (&argv, "-rtt %d", r->metric); |
6fbf66fa JY |
1476 | #endif |
1477 | ||
5a2e9a25 | 1478 | argv_printf_cat (&argv, "-net %s %s -netmask %s", |
6fbf66fa JY |
1479 | network, |
1480 | gateway, | |
1481 | netmask); | |
1482 | ||
8fc83a2d | 1483 | /* FIXME -- add on-link support for OpenBSD/NetBSD */ |
7fb0e07e | 1484 | |
5a2e9a25 JY |
1485 | argv_msg (D_ROUTE, &argv); |
1486 | status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route add command failed"); | |
6fbf66fa | 1487 | |
b4b92ae5 GD |
1488 | #elif defined(TARGET_AIX) |
1489 | ||
1490 | { | |
1491 | int netbits = netmask_to_netbits2(r->netmask); | |
1492 | argv_printf (&argv, "%s add -net %s/%d %s", | |
1493 | ROUTE_PATH, | |
1494 | network, netbits, gateway); | |
1495 | argv_msg (D_ROUTE, &argv); | |
1496 | status = openvpn_execve_check (&argv, es, 0, "ERROR: AIX route add command failed"); | |
1497 | } | |
1498 | ||
6fbf66fa JY |
1499 | #else |
1500 | 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"); | |
1501 | #endif | |
1502 | ||
1503 | done: | |
7fb0e07e JY |
1504 | if (status) |
1505 | r->flags |= RT_ADDED; | |
1506 | else | |
1507 | r->flags &= ~RT_ADDED; | |
5a2e9a25 | 1508 | argv_reset (&argv); |
6fbf66fa JY |
1509 | gc_free (&gc); |
1510 | } | |
1511 | ||
b55e49bd GD |
1512 | |
1513 | static const char * | |
1514 | print_in6_addr_netbits_only( struct in6_addr network_copy, int netbits, | |
1515 | struct gc_arena * gc) | |
1516 | { | |
1517 | /* clear host bit parts of route | |
1518 | * (needed if routes are specified improperly, or if we need to | |
1519 | * explicitely setup/clear the "connected" network routes on some OSes) | |
1520 | */ | |
1521 | int byte = 15; | |
1522 | int bits_to_clear = 128 - netbits; | |
1523 | ||
1524 | while( byte >= 0 && bits_to_clear > 0 ) | |
1525 | { | |
1526 | if ( bits_to_clear >= 8 ) | |
1527 | { network_copy.s6_addr[byte--] = 0; bits_to_clear -= 8; } | |
1528 | else | |
ffa1184d | 1529 | { network_copy.s6_addr[byte--] &= (0xff << bits_to_clear); bits_to_clear = 0; } |
b55e49bd GD |
1530 | } |
1531 | ||
1532 | return print_in6_addr( network_copy, 0, gc); | |
1533 | } | |
1534 | ||
512cda46 GD |
1535 | void |
1536 | add_route_ipv6 (struct route_ipv6 *r6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) | |
1537 | { | |
1538 | struct gc_arena gc; | |
1539 | struct argv argv; | |
1540 | ||
1541 | const char *network; | |
1542 | const char *gateway; | |
1543 | bool status = false; | |
1544 | const char *device = tt->actual_name; | |
512cda46 | 1545 | |
ff9c39b6 GD |
1546 | bool gateway_needed = false; |
1547 | ||
512cda46 GD |
1548 | if (!r6->defined) |
1549 | return; | |
1550 | ||
1551 | gc_init (&gc); | |
1552 | argv_init (&argv); | |
1553 | ||
b55e49bd | 1554 | network = print_in6_addr_netbits_only( r6->network, r6->netbits, &gc); |
512cda46 GD |
1555 | gateway = print_in6_addr( r6->gateway, 0, &gc); |
1556 | ||
1840c852 GD |
1557 | if ( !tt->ipv6 ) |
1558 | { | |
1559 | msg( M_INFO, "add_route_ipv6(): not adding %s/%d, no IPv6 on if %s", | |
1560 | network, r6->netbits, device ); | |
1561 | return; | |
1562 | } | |
1563 | ||
512cda46 GD |
1564 | msg( M_INFO, "add_route_ipv6(%s/%d -> %s metric %d) dev %s", |
1565 | network, r6->netbits, gateway, r6->metric, device ); | |
1566 | ||
1567 | /* | |
1568 | * Filter out routes which are essentially no-ops | |
1569 | * (not currently done for IPv6) | |
1570 | */ | |
1571 | ||
ff9c39b6 GD |
1572 | /* On "tun" interface, we never set a gateway if the operating system |
1573 | * can do "route to interface" - it does not add value, as the target | |
1574 | * dev already fully qualifies the route destination on point-to-point | |
1575 | * interfaces. OTOH, on "tap" interface, we must always set the | |
1576 | * gateway unless the route is to be an on-link network | |
1577 | */ | |
1578 | if ( tt->type == DEV_TYPE_TAP && | |
1579 | !(r6->metric_defined && r6->metric == 0 ) ) | |
1580 | { | |
1581 | gateway_needed = true; | |
1582 | } | |
1583 | ||
512cda46 | 1584 | #if defined(TARGET_LINUX) |
51bd56f4 | 1585 | #ifdef ENABLE_IPROUTE |
512cda46 GD |
1586 | argv_printf (&argv, "%s -6 route add %s/%d dev %s", |
1587 | iproute_path, | |
1588 | network, | |
1589 | r6->netbits, | |
1590 | device); | |
ff9c39b6 GD |
1591 | if (gateway_needed) |
1592 | argv_printf_cat (&argv, "via %s", gateway); | |
c37d9135 | 1593 | if (r6->metric_defined && r6->metric > 0 ) |
512cda46 GD |
1594 | argv_printf_cat (&argv, " metric %d", r6->metric); |
1595 | ||
1596 | #else | |
1597 | argv_printf (&argv, "%s -A inet6 add %s/%d dev %s", | |
1598 | ROUTE_PATH, | |
1599 | network, | |
1600 | r6->netbits, | |
1601 | device); | |
ff9c39b6 GD |
1602 | if (gateway_needed) |
1603 | argv_printf_cat (&argv, "gw %s", gateway); | |
c37d9135 | 1604 | if (r6->metric_defined && r6->metric > 0 ) |
512cda46 | 1605 | argv_printf_cat (&argv, " metric %d", r6->metric); |
51bd56f4 | 1606 | #endif /*ENABLE_IPROUTE*/ |
512cda46 GD |
1607 | argv_msg (D_ROUTE, &argv); |
1608 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Linux route -6/-A inet6 add command failed"); | |
1609 | ||
a55b3cdb AS |
1610 | #elif defined (TARGET_ANDROID) |
1611 | struct buffer out = alloc_buf_gc (64, &gc); | |
1612 | ||
05660e78 | 1613 | buf_printf (&out, "%s/%d %s", network, r6->netbits, device); |
a55b3cdb AS |
1614 | |
1615 | management_android_control (management, "ROUTE6", buf_bptr(&out)); | |
1616 | ||
512cda46 GD |
1617 | #elif defined (WIN32) |
1618 | ||
6607def8 GD |
1619 | /* netsh interface ipv6 add route 2001:db8::/32 MyTunDevice */ |
1620 | argv_printf (&argv, "%s%sc interface ipv6 add route %s/%d %s", | |
1621 | get_win_sys_path(), | |
1622 | NETSH_PATH_SUFFIX, | |
1623 | network, | |
1624 | r6->netbits, | |
1625 | device); | |
1626 | ||
a9557fcb GD |
1627 | /* next-hop depends on TUN or TAP mode: |
1628 | * - in TAP mode, we use the "real" next-hop | |
1629 | * - in TUN mode we use a special-case link-local address that the tapdrvr | |
1630 | * knows about and will answer ND (neighbor discovery) packets for | |
1631 | */ | |
1632 | if ( tt->type == DEV_TYPE_TUN ) | |
1633 | argv_printf_cat( &argv, " %s", "fe80::8" ); | |
1634 | else | |
1635 | argv_printf_cat( &argv, " %s", gateway ); | |
1636 | ||
6607def8 GD |
1637 | #if 0 |
1638 | if (r->metric_defined) | |
a9557fcb | 1639 | argv_printf_cat (&argv, " METRIC %d", r->metric); |
6607def8 GD |
1640 | #endif |
1641 | ||
b55e49bd GD |
1642 | /* in some versions of Windows, routes are persistent across reboots by |
1643 | * default, unless "store=active" is set (pointed out by Tony Lim, thanks) | |
1644 | */ | |
1645 | argv_printf_cat( &argv, " store=active" ); | |
1646 | ||
6607def8 GD |
1647 | argv_msg (D_ROUTE, &argv); |
1648 | ||
1649 | netcmd_semaphore_lock (); | |
1650 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Windows route add ipv6 command failed"); | |
1651 | netcmd_semaphore_release (); | |
512cda46 GD |
1652 | |
1653 | #elif defined (TARGET_SOLARIS) | |
1654 | ||
1655 | /* example: route add -inet6 2001:db8::/32 somegateway 0 */ | |
1656 | ||
1657 | /* for some weird reason, this does not work for me unless I set | |
1658 | * "metric 0" - otherwise, the routes will be nicely installed, but | |
1659 | * packets will just disappear somewhere. So we use "0" now... | |
1660 | */ | |
1661 | ||
1662 | argv_printf (&argv, "%s add -inet6 %s/%d %s 0", | |
1663 | ROUTE_PATH, | |
1664 | network, | |
1665 | r6->netbits, | |
1666 | gateway ); | |
1667 | ||
1668 | argv_msg (D_ROUTE, &argv); | |
1669 | status = openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route add -inet6 command failed"); | |
1670 | ||
1671 | #elif defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) | |
1672 | ||
ff9c39b6 | 1673 | argv_printf (&argv, "%s add -inet6 %s/%d", |
512cda46 GD |
1674 | ROUTE_PATH, |
1675 | network, | |
ff9c39b6 GD |
1676 | r6->netbits); |
1677 | ||
1678 | if (gateway_needed) | |
1679 | argv_printf_cat (&argv, "%s", gateway); | |
1680 | else | |
1681 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
1682 | |
1683 | argv_msg (D_ROUTE, &argv); | |
1684 | status = openvpn_execve_check (&argv, es, 0, "ERROR: *BSD route add -inet6 command failed"); | |
1685 | ||
1686 | #elif defined(TARGET_DARWIN) | |
1687 | ||
ff9c39b6 | 1688 | argv_printf (&argv, "%s add -inet6 %s -prefixlen %d", |
512cda46 | 1689 | ROUTE_PATH, |
ff9c39b6 GD |
1690 | network, r6->netbits ); |
1691 | ||
1692 | if (gateway_needed) | |
1693 | argv_printf_cat (&argv, "%s", gateway); | |
1694 | else | |
1695 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
1696 | |
1697 | argv_msg (D_ROUTE, &argv); | |
1698 | status = openvpn_execve_check (&argv, es, 0, "ERROR: MacOS X route add -inet6 command failed"); | |
1699 | ||
ada9769e | 1700 | #elif defined(TARGET_OPENBSD) |
512cda46 | 1701 | |
ada9769e GD |
1702 | argv_printf (&argv, "%s add -inet6 %s -prefixlen %d %s", |
1703 | ROUTE_PATH, | |
1704 | network, r6->netbits, gateway ); | |
1705 | ||
1706 | argv_msg (D_ROUTE, &argv); | |
1707 | status = openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD route add -inet6 command failed"); | |
1708 | ||
1709 | #elif defined(TARGET_NETBSD) | |
512cda46 GD |
1710 | |
1711 | argv_printf (&argv, "%s add -inet6 %s/%d %s", | |
1712 | ROUTE_PATH, | |
1713 | network, r6->netbits, gateway ); | |
1714 | ||
1715 | argv_msg (D_ROUTE, &argv); | |
ada9769e | 1716 | status = openvpn_execve_check (&argv, es, 0, "ERROR: NetBSD route add -inet6 command failed"); |
512cda46 | 1717 | |
b4b92ae5 GD |
1718 | #elif defined(TARGET_AIX) |
1719 | ||
1720 | argv_printf (&argv, "%s add -inet6 %s/%d %s", | |
1721 | ROUTE_PATH, | |
1722 | network, r6->netbits, gateway); | |
1723 | argv_msg (D_ROUTE, &argv); | |
1724 | status = openvpn_execve_check (&argv, es, 0, "ERROR: AIX route add command failed"); | |
1725 | ||
512cda46 GD |
1726 | #else |
1727 | 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"); | |
1728 | #endif | |
1729 | ||
1730 | r6->defined = status; | |
1731 | argv_reset (&argv); | |
1732 | gc_free (&gc); | |
1733 | } | |
1734 | ||
6fbf66fa | 1735 | static void |
b57e005b | 1736 | delete_route (struct route_ipv4 *r, |
7fb0e07e JY |
1737 | const struct tuntap *tt, |
1738 | unsigned int flags, | |
1739 | const struct route_gateway_info *rgi, | |
1740 | const struct env_set *es) | |
6fbf66fa JY |
1741 | { |
1742 | struct gc_arena gc; | |
5a2e9a25 | 1743 | struct argv argv; |
6fbf66fa JY |
1744 | const char *network; |
1745 | const char *netmask; | |
1746 | const char *gateway; | |
7fb0e07e | 1747 | int is_local_route; |
6fbf66fa | 1748 | |
7fb0e07e | 1749 | if ((r->flags & (RT_DEFINED|RT_ADDED)) != (RT_DEFINED|RT_ADDED)) |
6fbf66fa JY |
1750 | return; |
1751 | ||
1752 | gc_init (&gc); | |
5a2e9a25 | 1753 | argv_init (&argv); |
6fbf66fa | 1754 | |
6fbf66fa JY |
1755 | network = print_in_addr_t (r->network, 0, &gc); |
1756 | netmask = print_in_addr_t (r->netmask, 0, &gc); | |
1757 | gateway = print_in_addr_t (r->gateway, 0, &gc); | |
1758 | ||
7fb0e07e JY |
1759 | is_local_route = local_route(r->network, r->netmask, r->gateway, rgi); |
1760 | if (is_local_route == LR_ERROR) | |
1761 | goto done; | |
1762 | ||
6fbf66fa | 1763 | #if defined(TARGET_LINUX) |
51bd56f4 | 1764 | #ifdef ENABLE_IPROUTE |
5a2e9a25 | 1765 | argv_printf (&argv, "%s route del %s/%d", |
0aee9ca7 | 1766 | iproute_path, |
6fbf66fa JY |
1767 | network, |
1768 | count_netmask_bits(netmask)); | |
1769 | #else | |
5a2e9a25 | 1770 | argv_printf (&argv, "%s del -net %s netmask %s", |
7fb0e07e JY |
1771 | ROUTE_PATH, |
1772 | network, | |
1773 | netmask); | |
51bd56f4 | 1774 | #endif /*ENABLE_IPROUTE*/ |
7fb0e07e | 1775 | if (r->flags & RT_METRIC_DEFINED) |
5a2e9a25 JY |
1776 | argv_printf_cat (&argv, "metric %d", r->metric); |
1777 | argv_msg (D_ROUTE, &argv); | |
1778 | openvpn_execve_check (&argv, es, 0, "ERROR: Linux route delete command failed"); | |
6fbf66fa JY |
1779 | |
1780 | #elif defined (WIN32) | |
1781 | ||
a8281352 | 1782 | argv_printf (&argv, "%s%sc DELETE %s MASK %s %s", |
5a2e9a25 JY |
1783 | get_win_sys_path(), |
1784 | WIN_ROUTE_PATH_SUFFIX, | |
1785 | network, | |
1786 | netmask, | |
1787 | gateway); | |
6fbf66fa | 1788 | |
5a2e9a25 | 1789 | argv_msg (D_ROUTE, &argv); |
6fbf66fa JY |
1790 | |
1791 | if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_IPAPI) | |
1792 | { | |
1793 | const bool status = del_route_ipapi (r, tt); | |
1794 | msg (D_ROUTE, "Route deletion via IPAPI %s", status ? "succeeded" : "failed"); | |
1795 | } | |
1796 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_EXE) | |
1797 | { | |
1798 | netcmd_semaphore_lock (); | |
5a2e9a25 | 1799 | openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed"); |
6fbf66fa JY |
1800 | netcmd_semaphore_release (); |
1801 | } | |
6215931b JY |
1802 | else if ((flags & ROUTE_METHOD_MASK) == ROUTE_METHOD_ADAPTIVE) |
1803 | { | |
1804 | const bool status = del_route_ipapi (r, tt); | |
1805 | msg (D_ROUTE, "Route deletion via IPAPI %s [adaptive]", status ? "succeeded" : "failed"); | |
1806 | if (!status) | |
1807 | { | |
1808 | msg (D_ROUTE, "Route deletion fallback to route.exe"); | |
1809 | netcmd_semaphore_lock (); | |
5a2e9a25 | 1810 | openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete command failed [adaptive]"); |
6215931b JY |
1811 | netcmd_semaphore_release (); |
1812 | } | |
1813 | } | |
6fbf66fa JY |
1814 | else |
1815 | { | |
1816 | ASSERT (0); | |
1817 | } | |
1818 | ||
1819 | #elif defined (TARGET_SOLARIS) | |
1820 | ||
5a2e9a25 JY |
1821 | argv_printf (&argv, "%s delete %s -netmask %s %s", |
1822 | ROUTE_PATH, | |
6fbf66fa JY |
1823 | network, |
1824 | netmask, | |
1825 | gateway); | |
1826 | ||
5a2e9a25 JY |
1827 | argv_msg (D_ROUTE, &argv); |
1828 | openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete command failed"); | |
6fbf66fa JY |
1829 | |
1830 | #elif defined(TARGET_FREEBSD) | |
1831 | ||
5a2e9a25 JY |
1832 | argv_printf (&argv, "%s delete -net %s %s %s", |
1833 | ROUTE_PATH, | |
6fbf66fa JY |
1834 | network, |
1835 | gateway, | |
1836 | netmask); | |
1837 | ||
5a2e9a25 JY |
1838 | argv_msg (D_ROUTE, &argv); |
1839 | openvpn_execve_check (&argv, es, 0, "ERROR: FreeBSD route delete command failed"); | |
6fbf66fa | 1840 | |
1bda73a7 JY |
1841 | #elif defined(TARGET_DRAGONFLY) |
1842 | ||
5a2e9a25 JY |
1843 | argv_printf (&argv, "%s delete -net %s %s %s", |
1844 | ROUTE_PATH, | |
1bda73a7 JY |
1845 | network, |
1846 | gateway, | |
1847 | netmask); | |
1848 | ||
5a2e9a25 JY |
1849 | argv_msg (D_ROUTE, &argv); |
1850 | openvpn_execve_check (&argv, es, 0, "ERROR: DragonFly route delete command failed"); | |
1bda73a7 | 1851 | |
6fbf66fa JY |
1852 | #elif defined(TARGET_DARWIN) |
1853 | ||
8fc83a2d | 1854 | if (is_on_link (is_local_route, flags, rgi)) |
7fb0e07e JY |
1855 | { |
1856 | argv_printf (&argv, "%s delete -cloning -net %s -netmask %s -interface %s", | |
1857 | ROUTE_PATH, | |
1858 | network, | |
1859 | netmask, | |
1860 | rgi->iface); | |
1861 | } | |
1862 | else | |
1863 | { | |
1864 | argv_printf (&argv, "%s delete -net %s %s %s", | |
1865 | ROUTE_PATH, | |
1866 | network, | |
1867 | gateway, | |
1868 | netmask); | |
1869 | } | |
6fbf66fa | 1870 | |
5a2e9a25 JY |
1871 | argv_msg (D_ROUTE, &argv); |
1872 | openvpn_execve_check (&argv, es, 0, "ERROR: OS X route delete command failed"); | |
6fbf66fa JY |
1873 | |
1874 | #elif defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) | |
1875 | ||
5a2e9a25 JY |
1876 | argv_printf (&argv, "%s delete -net %s %s -netmask %s", |
1877 | ROUTE_PATH, | |
6fbf66fa JY |
1878 | network, |
1879 | gateway, | |
1880 | netmask); | |
1881 | ||
5a2e9a25 JY |
1882 | argv_msg (D_ROUTE, &argv); |
1883 | openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD/NetBSD route delete command failed"); | |
b4b92ae5 | 1884 | |
a55b3cdb AS |
1885 | #elif defined(TARGET_ANDROID) |
1886 | msg (M_NONFATAL, "Sorry, deleting routes on Android is not possible. The VpnService API allows routes to be set on connect only."); | |
b4b92ae5 GD |
1887 | |
1888 | #elif defined(TARGET_AIX) | |
1889 | ||
1890 | { | |
1891 | int netbits = netmask_to_netbits2(r->netmask); | |
1892 | argv_printf (&argv, "%s delete -net %s/%d %s", | |
1893 | ROUTE_PATH, | |
1894 | network, netbits, gateway); | |
1895 | argv_msg (D_ROUTE, &argv); | |
1896 | openvpn_execve_check (&argv, es, 0, "ERROR: AIX route delete command failed"); | |
1897 | } | |
1898 | ||
6fbf66fa JY |
1899 | #else |
1900 | 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"); | |
1901 | #endif | |
1902 | ||
7fb0e07e JY |
1903 | done: |
1904 | r->flags &= ~RT_ADDED; | |
5a2e9a25 | 1905 | argv_reset (&argv); |
6fbf66fa JY |
1906 | gc_free (&gc); |
1907 | } | |
1908 | ||
b55e49bd | 1909 | void |
512cda46 GD |
1910 | delete_route_ipv6 (const struct route_ipv6 *r6, const struct tuntap *tt, unsigned int flags, const struct env_set *es) |
1911 | { | |
1912 | struct gc_arena gc; | |
1913 | struct argv argv; | |
1914 | const char *network; | |
1915 | const char *gateway; | |
1916 | const char *device = tt->actual_name; | |
ff9c39b6 | 1917 | bool gateway_needed = false; |
512cda46 GD |
1918 | |
1919 | if (!r6->defined) | |
1920 | return; | |
1921 | ||
1922 | gc_init (&gc); | |
1923 | argv_init (&argv); | |
1924 | ||
b55e49bd | 1925 | network = print_in6_addr_netbits_only( r6->network, r6->netbits, &gc); |
512cda46 GD |
1926 | gateway = print_in6_addr( r6->gateway, 0, &gc); |
1927 | ||
1840c852 GD |
1928 | if ( !tt->ipv6 ) |
1929 | { | |
1930 | msg( M_INFO, "delete_route_ipv6(): not deleting %s/%d, no IPv6 on if %s", | |
1931 | network, r6->netbits, device ); | |
1932 | return; | |
1933 | } | |
1934 | ||
512cda46 GD |
1935 | msg( M_INFO, "delete_route_ipv6(%s/%d)", network, r6->netbits ); |
1936 | ||
ff9c39b6 GD |
1937 | /* if we used a gateway on "add route", we also need to specify it on |
1938 | * delete, otherwise some OSes will refuse to delete the route | |
1939 | */ | |
1940 | if ( tt->type == DEV_TYPE_TAP && | |
1941 | !(r6->metric_defined && r6->metric == 0 ) ) | |
1942 | { | |
1943 | gateway_needed = true; | |
1944 | } | |
1945 | ||
1946 | ||
512cda46 | 1947 | #if defined(TARGET_LINUX) |
51bd56f4 | 1948 | #ifdef ENABLE_IPROUTE |
512cda46 GD |
1949 | argv_printf (&argv, "%s -6 route del %s/%d dev %s", |
1950 | iproute_path, | |
1951 | network, | |
1952 | r6->netbits, | |
1953 | device); | |
ff9c39b6 GD |
1954 | if (gateway_needed) |
1955 | argv_printf_cat (&argv, "via %s", gateway); | |
512cda46 GD |
1956 | #else |
1957 | argv_printf (&argv, "%s -A inet6 del %s/%d dev %s", | |
1958 | ROUTE_PATH, | |
1959 | network, | |
1960 | r6->netbits, | |
1961 | device); | |
ff9c39b6 GD |
1962 | if (gateway_needed) |
1963 | argv_printf_cat (&argv, "gw %s", gateway); | |
1964 | if (r6->metric_defined && r6->metric > 0 ) | |
1965 | argv_printf_cat (&argv, " metric %d", r6->metric); | |
51bd56f4 | 1966 | #endif /*ENABLE_IPROUTE*/ |
512cda46 GD |
1967 | argv_msg (D_ROUTE, &argv); |
1968 | openvpn_execve_check (&argv, es, 0, "ERROR: Linux route -6/-A inet6 del command failed"); | |
1969 | ||
1970 | #elif defined (WIN32) | |
1971 | ||
6607def8 GD |
1972 | /* netsh interface ipv6 delete route 2001:db8::/32 MyTunDevice */ |
1973 | argv_printf (&argv, "%s%sc interface ipv6 delete route %s/%d %s", | |
1974 | get_win_sys_path(), | |
1975 | NETSH_PATH_SUFFIX, | |
1976 | network, | |
1977 | r6->netbits, | |
1978 | device); | |
1979 | ||
94d50a17 GD |
1980 | /* next-hop depends on TUN or TAP mode: |
1981 | * - in TAP mode, we use the "real" next-hop | |
1982 | * - in TUN mode we use a special-case link-local address that the tapdrvr | |
1983 | * knows about and will answer ND (neighbor discovery) packets for | |
1984 | * (and "route deletion without specifying next-hop" does not work...) | |
1985 | */ | |
1986 | if ( tt->type == DEV_TYPE_TUN ) | |
1987 | argv_printf_cat( &argv, " %s", "fe80::8" ); | |
1988 | else | |
1989 | argv_printf_cat( &argv, " %s", gateway ); | |
1990 | ||
6607def8 GD |
1991 | #if 0 |
1992 | if (r->metric_defined) | |
1993 | argv_printf_cat (&argv, "METRIC %d", r->metric); | |
1994 | #endif | |
1995 | ||
4b4fac91 GD |
1996 | /* Windows XP to 7 "just delete" routes, wherever they came from, but |
1997 | * in Windows 8(.1?), if you create them with "store=active", this is | |
1998 | * how you should delete them as well (pointed out by Cedric Tabary) | |
1999 | */ | |
2000 | argv_printf_cat( &argv, " store=active" ); | |
2001 | ||
6607def8 GD |
2002 | argv_msg (D_ROUTE, &argv); |
2003 | ||
2004 | netcmd_semaphore_lock (); | |
4b4fac91 | 2005 | openvpn_execve_check (&argv, es, 0, "ERROR: Windows route delete ipv6 command failed"); |
6607def8 | 2006 | netcmd_semaphore_release (); |
512cda46 GD |
2007 | |
2008 | #elif defined (TARGET_SOLARIS) | |
2009 | ||
2010 | /* example: route delete -inet6 2001:db8::/32 somegateway */ | |
2011 | /* GERT-TODO: this is untested, but should work */ | |
2012 | ||
2013 | argv_printf (&argv, "%s delete -inet6 %s/%d %s", | |
2014 | ROUTE_PATH, | |
2015 | network, | |
2016 | r6->netbits, | |
2017 | gateway ); | |
2018 | ||
2019 | argv_msg (D_ROUTE, &argv); | |
2020 | openvpn_execve_check (&argv, es, 0, "ERROR: Solaris route delete -inet6 command failed"); | |
2021 | ||
2022 | #elif defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) | |
2023 | ||
ff9c39b6 | 2024 | argv_printf (&argv, "%s delete -inet6 %s/%d", |
512cda46 GD |
2025 | ROUTE_PATH, |
2026 | network, | |
ff9c39b6 GD |
2027 | r6->netbits ); |
2028 | ||
2029 | if (gateway_needed) | |
2030 | argv_printf_cat (&argv, "%s", gateway); | |
2031 | else | |
2032 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
2033 | |
2034 | argv_msg (D_ROUTE, &argv); | |
2035 | openvpn_execve_check (&argv, es, 0, "ERROR: *BSD route delete -inet6 command failed"); | |
2036 | ||
2037 | #elif defined(TARGET_DARWIN) | |
2038 | ||
ff9c39b6 | 2039 | argv_printf (&argv, "%s delete -inet6 %s -prefixlen %d", |
512cda46 | 2040 | ROUTE_PATH, |
ff9c39b6 GD |
2041 | network, r6->netbits ); |
2042 | ||
2043 | if (gateway_needed) | |
2044 | argv_printf_cat (&argv, "%s", gateway); | |
2045 | else | |
2046 | argv_printf_cat (&argv, "-iface %s", device); | |
512cda46 GD |
2047 | |
2048 | argv_msg (D_ROUTE, &argv); | |
ff9c39b6 | 2049 | openvpn_execve_check (&argv, es, 0, "ERROR: MacOS X route delete -inet6 command failed"); |
512cda46 | 2050 | |
ada9769e | 2051 | #elif defined(TARGET_OPENBSD) |
512cda46 | 2052 | |
ada9769e GD |
2053 | argv_printf (&argv, "%s delete -inet6 %s -prefixlen %d %s", |
2054 | ROUTE_PATH, | |
2055 | network, r6->netbits, gateway ); | |
2056 | ||
2057 | argv_msg (D_ROUTE, &argv); | |
2058 | openvpn_execve_check (&argv, es, 0, "ERROR: OpenBSD route delete -inet6 command failed"); | |
2059 | ||
2060 | #elif defined(TARGET_NETBSD) | |
512cda46 GD |
2061 | |
2062 | argv_printf (&argv, "%s delete -inet6 %s/%d %s", | |
2063 | ROUTE_PATH, | |
2064 | network, r6->netbits, gateway ); | |
2065 | ||
2066 | argv_msg (D_ROUTE, &argv); | |
ada9769e | 2067 | openvpn_execve_check (&argv, es, 0, "ERROR: NetBSD route delete -inet6 command failed"); |
512cda46 | 2068 | |
b4b92ae5 GD |
2069 | #elif defined(TARGET_AIX) |
2070 | ||
2071 | argv_printf (&argv, "%s delete -inet6 %s/%d %s", | |
2072 | ROUTE_PATH, | |
2073 | network, r6->netbits, gateway); | |
2074 | argv_msg (D_ROUTE, &argv); | |
2075 | openvpn_execve_check (&argv, es, 0, "ERROR: AIX route add command failed"); | |
2076 | ||
512cda46 GD |
2077 | #else |
2078 | 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"); | |
2079 | #endif | |
2080 | ||
2081 | argv_reset (&argv); | |
2082 | gc_free (&gc); | |
2083 | } | |
2084 | ||
6fbf66fa JY |
2085 | /* |
2086 | * The --redirect-gateway option requires OS-specific code below | |
2087 | * to get the current default gateway. | |
2088 | */ | |
2089 | ||
2090 | #if defined(WIN32) | |
2091 | ||
2092 | static const MIB_IPFORWARDTABLE * | |
2093 | get_windows_routing_table (struct gc_arena *gc) | |
2094 | { | |
2095 | ULONG size = 0; | |
2096 | PMIB_IPFORWARDTABLE rt = NULL; | |
2097 | DWORD status; | |
2098 | ||
2099 | status = GetIpForwardTable (NULL, &size, TRUE); | |
2100 | if (status == ERROR_INSUFFICIENT_BUFFER) | |
2101 | { | |
2102 | rt = (PMIB_IPFORWARDTABLE) gc_malloc (size, false, gc); | |
2103 | status = GetIpForwardTable (rt, &size, TRUE); | |
2104 | if (status != NO_ERROR) | |
2105 | { | |
2106 | msg (D_ROUTE, "NOTE: GetIpForwardTable returned error: %s (code=%u)", | |
2107 | strerror_win32 (status, gc), | |
2108 | (unsigned int)status); | |
2109 | rt = NULL; | |
2110 | } | |
2111 | } | |
2112 | return rt; | |
2113 | } | |
2114 | ||
2115 | static int | |
2116 | test_route (const IP_ADAPTER_INFO *adapters, | |
2117 | const in_addr_t gateway, | |
2118 | DWORD *index) | |
2119 | { | |
2120 | int count = 0; | |
f77c60d3 | 2121 | DWORD i = adapter_index_of_ip (adapters, gateway, &count, NULL); |
6fbf66fa JY |
2122 | if (index) |
2123 | *index = i; | |
2124 | return count; | |
2125 | } | |
2126 | ||
2127 | static void | |
2128 | test_route_helper (bool *ret, | |
2129 | int *count, | |
2130 | int *good, | |
2131 | int *ambig, | |
2132 | const IP_ADAPTER_INFO *adapters, | |
2133 | const in_addr_t gateway) | |
2134 | { | |
2135 | int c; | |
2136 | ||
2137 | ++*count; | |
2138 | c = test_route (adapters, gateway, NULL); | |
2139 | if (c == 0) | |
2140 | *ret = false; | |
2141 | else | |
2142 | ++*good; | |
2143 | if (c > 1) | |
2144 | ++*ambig; | |
2145 | } | |
2146 | ||
2147 | /* | |
2148 | * If we tried to add routes now, would we succeed? | |
2149 | */ | |
2150 | bool | |
2151 | test_routes (const struct route_list *rl, const struct tuntap *tt) | |
2152 | { | |
2153 | struct gc_arena gc = gc_new (); | |
2154 | const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); | |
2155 | bool ret = false; | |
2156 | int count = 0; | |
2157 | int good = 0; | |
2158 | int ambig = 0; | |
d0085293 | 2159 | int len = -1; |
6fbf66fa JY |
2160 | bool adapter_up = false; |
2161 | ||
2162 | if (is_adapter_up (tt, adapters)) | |
2163 | { | |
2164 | ret = true; | |
2165 | adapter_up = true; | |
2166 | ||
2167 | if (rl) | |
2168 | { | |
60b40a58 | 2169 | struct route_ipv4 *r; |
d0085293 HH |
2170 | for (r = rl->routes, len = 0; r; r = r->next, ++len) |
2171 | test_route_helper (&ret, &count, &good, &ambig, adapters, r->gateway); | |
6fbf66fa | 2172 | |
7fb0e07e | 2173 | if ((rl->flags & RG_ENABLE) && (rl->spec.flags & RTSA_REMOTE_ENDPOINT)) |
6fbf66fa JY |
2174 | test_route_helper (&ret, &count, &good, &ambig, adapters, rl->spec.remote_endpoint); |
2175 | } | |
2176 | } | |
2177 | ||
2178 | msg (D_ROUTE, "TEST ROUTES: %d/%d succeeded len=%d ret=%d a=%d u/d=%s", | |
2179 | good, | |
2180 | count, | |
d0085293 | 2181 | len, |
6fbf66fa JY |
2182 | (int)ret, |
2183 | ambig, | |
2184 | adapter_up ? "up" : "down"); | |
2185 | ||
2186 | gc_free (&gc); | |
2187 | return ret; | |
2188 | } | |
2189 | ||
3c7f2f55 JY |
2190 | static const MIB_IPFORWARDROW * |
2191 | get_default_gateway_row (const MIB_IPFORWARDTABLE *routes) | |
6fbf66fa | 2192 | { |
348fb443 | 2193 | struct gc_arena gc = gc_new (); |
12e46092 | 2194 | DWORD lowest_metric = MAXDWORD; |
3c7f2f55 | 2195 | const MIB_IPFORWARDROW *ret = NULL; |
6fbf66fa | 2196 | int i; |
348fb443 | 2197 | int best = -1; |
6fbf66fa | 2198 | |
3c7f2f55 | 2199 | if (routes) |
6fbf66fa | 2200 | { |
3c7f2f55 JY |
2201 | for (i = 0; i < routes->dwNumEntries; ++i) |
2202 | { | |
2203 | const MIB_IPFORWARDROW *row = &routes->table[i]; | |
2204 | const in_addr_t net = ntohl (row->dwForwardDest); | |
2205 | const in_addr_t mask = ntohl (row->dwForwardMask); | |
2206 | const DWORD index = row->dwForwardIfIndex; | |
348fb443 | 2207 | const DWORD metric = row->dwForwardMetric1; |
6fbf66fa | 2208 | |
348fb443 JY |
2209 | dmsg (D_ROUTE_DEBUG, "GDGR: route[%d] %s/%s i=%d m=%d", |
2210 | i, | |
2211 | print_in_addr_t ((in_addr_t) net, 0, &gc), | |
2212 | print_in_addr_t ((in_addr_t) mask, 0, &gc), | |
2213 | (int)index, | |
2214 | (int)metric); | |
3c7f2f55 | 2215 | |
348fb443 | 2216 | if (!net && !mask && metric < lowest_metric) |
3c7f2f55 JY |
2217 | { |
2218 | ret = row; | |
348fb443 JY |
2219 | lowest_metric = metric; |
2220 | best = i; | |
3c7f2f55 | 2221 | } |
6fbf66fa JY |
2222 | } |
2223 | } | |
348fb443 JY |
2224 | |
2225 | dmsg (D_ROUTE_DEBUG, "GDGR: best=%d lm=%u", best, (unsigned int)lowest_metric); | |
2226 | ||
2227 | gc_free (&gc); | |
3c7f2f55 JY |
2228 | return ret; |
2229 | } | |
2230 | ||
7fb0e07e JY |
2231 | void |
2232 | get_default_gateway (struct route_gateway_info *rgi) | |
3c7f2f55 JY |
2233 | { |
2234 | struct gc_arena gc = gc_new (); | |
3c7f2f55 | 2235 | |
f77c60d3 | 2236 | const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); |
3c7f2f55 JY |
2237 | const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc); |
2238 | const MIB_IPFORWARDROW *row = get_default_gateway_row (routes); | |
7fb0e07e JY |
2239 | DWORD a_index; |
2240 | const IP_ADAPTER_INFO *ai; | |
2241 | ||
2242 | CLEAR(*rgi); | |
3c7f2f55 JY |
2243 | |
2244 | if (row) | |
2245 | { | |
7fb0e07e JY |
2246 | rgi->gateway.addr = ntohl (row->dwForwardNextHop); |
2247 | if (rgi->gateway.addr) | |
f77c60d3 | 2248 | { |
7fb0e07e JY |
2249 | rgi->flags |= RGI_ADDR_DEFINED; |
2250 | a_index = adapter_index_of_ip (adapters, rgi->gateway.addr, NULL, &rgi->gateway.netmask); | |
12e46092 | 2251 | if (a_index != TUN_ADAPTER_INDEX_INVALID) |
7fb0e07e JY |
2252 | { |
2253 | rgi->adapter_index = a_index; | |
2254 | rgi->flags |= (RGI_IFACE_DEFINED|RGI_NETMASK_DEFINED); | |
2255 | ai = get_adapter (adapters, a_index); | |
2256 | if (ai) | |
2257 | { | |
2258 | memcpy (rgi->hwaddr, ai->Address, 6); | |
2259 | rgi->flags |= RGI_HWADDR_DEFINED; | |
2260 | } | |
2261 | } | |
f77c60d3 | 2262 | } |
3c7f2f55 JY |
2263 | } |
2264 | ||
6fbf66fa | 2265 | gc_free (&gc); |
6fbf66fa JY |
2266 | } |
2267 | ||
2268 | static DWORD | |
b57e005b | 2269 | windows_route_find_if_index (const struct route_ipv4 *r, const struct tuntap *tt) |
6fbf66fa JY |
2270 | { |
2271 | struct gc_arena gc = gc_new (); | |
12e46092 | 2272 | DWORD ret = TUN_ADAPTER_INDEX_INVALID; |
6fbf66fa JY |
2273 | int count = 0; |
2274 | const IP_ADAPTER_INFO *adapters = get_adapter_info_list (&gc); | |
2275 | const IP_ADAPTER_INFO *tun_adapter = get_tun_adapter (tt, adapters); | |
2276 | bool on_tun = false; | |
2277 | ||
2278 | /* first test on tun interface */ | |
2279 | if (is_ip_in_adapter_subnet (tun_adapter, r->gateway, NULL)) | |
2280 | { | |
2281 | ret = tun_adapter->Index; | |
2282 | count = 1; | |
2283 | on_tun = true; | |
2284 | } | |
2285 | else /* test on other interfaces */ | |
2286 | { | |
2287 | count = test_route (adapters, r->gateway, &ret); | |
2288 | } | |
2289 | ||
2290 | if (count == 0) | |
2291 | { | |
2292 | msg (M_WARN, "Warning: route gateway is not reachable on any active network adapters: %s", | |
2293 | print_in_addr_t (r->gateway, 0, &gc)); | |
12e46092 | 2294 | ret = TUN_ADAPTER_INDEX_INVALID; |
6fbf66fa JY |
2295 | } |
2296 | else if (count > 1) | |
2297 | { | |
2298 | msg (M_WARN, "Warning: route gateway is ambiguous: %s (%d matches)", | |
2299 | print_in_addr_t (r->gateway, 0, &gc), | |
2300 | count); | |
12e46092 | 2301 | ret = TUN_ADAPTER_INDEX_INVALID; |
6fbf66fa JY |
2302 | } |
2303 | ||
2304 | dmsg (D_ROUTE_DEBUG, "DEBUG: route find if: on_tun=%d count=%d index=%d", | |
2305 | on_tun, | |
2306 | count, | |
2307 | (int)ret); | |
2308 | ||
2309 | gc_free (&gc); | |
2310 | return ret; | |
2311 | } | |
2312 | ||
2313 | bool | |
b57e005b | 2314 | add_route_ipapi (const struct route_ipv4 *r, const struct tuntap *tt, DWORD adapter_index) |
6fbf66fa JY |
2315 | { |
2316 | struct gc_arena gc = gc_new (); | |
2317 | bool ret = false; | |
2318 | DWORD status; | |
12e46092 | 2319 | const DWORD if_index = (adapter_index == TUN_ADAPTER_INDEX_INVALID) ? windows_route_find_if_index (r, tt) : adapter_index; |
6fbf66fa | 2320 | |
12e46092 | 2321 | if (if_index != TUN_ADAPTER_INDEX_INVALID) |
6fbf66fa JY |
2322 | { |
2323 | MIB_IPFORWARDROW fr; | |
2324 | CLEAR (fr); | |
2325 | fr.dwForwardDest = htonl (r->network); | |
2326 | fr.dwForwardMask = htonl (r->netmask); | |
2327 | fr.dwForwardPolicy = 0; | |
2328 | fr.dwForwardNextHop = htonl (r->gateway); | |
2329 | fr.dwForwardIfIndex = if_index; | |
2330 | fr.dwForwardType = 4; /* the next hop is not the final dest */ | |
2331 | fr.dwForwardProto = 3; /* PROTO_IP_NETMGMT */ | |
2332 | fr.dwForwardAge = 0; | |
2333 | fr.dwForwardNextHopAS = 0; | |
7fb0e07e | 2334 | fr.dwForwardMetric1 = (r->flags & RT_METRIC_DEFINED) ? r->metric : 1; |
12e46092 ABL |
2335 | fr.dwForwardMetric2 = METRIC_NOT_USED; |
2336 | fr.dwForwardMetric3 = METRIC_NOT_USED; | |
2337 | fr.dwForwardMetric4 = METRIC_NOT_USED; | |
2338 | fr.dwForwardMetric5 = METRIC_NOT_USED; | |
6fbf66fa JY |
2339 | |
2340 | if ((r->network & r->netmask) != r->network) | |
2341 | msg (M_WARN, "Warning: address %s is not a network address in relation to netmask %s", | |
2342 | print_in_addr_t (r->network, 0, &gc), | |
2343 | print_in_addr_t (r->netmask, 0, &gc)); | |
2344 | ||
2345 | status = CreateIpForwardEntry (&fr); | |
2346 | ||
2347 | if (status == NO_ERROR) | |
2348 | ret = true; | |
2349 | else | |
2350 | { | |
94a43500 JY |
2351 | /* failed, try increasing the metric to work around Vista issue */ |
2352 | const unsigned int forward_metric_limit = 2048; /* iteratively retry higher metrics up to this limit */ | |
6fbf66fa | 2353 | |
94a43500 JY |
2354 | for ( ; fr.dwForwardMetric1 <= forward_metric_limit; ++fr.dwForwardMetric1) |
2355 | { | |
2356 | /* try a different forward type=3 ("the next hop is the final dest") in addition to 4. | |
2357 | --redirect-gateway over RRAS seems to need this. */ | |
2358 | for (fr.dwForwardType = 4; fr.dwForwardType >= 3; --fr.dwForwardType) | |
2359 | { | |
2360 | status = CreateIpForwardEntry (&fr); | |
2361 | if (status == NO_ERROR) | |
2362 | { | |
2363 | msg (D_ROUTE, "ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=%u and dwForwardType=%u", | |
2364 | (unsigned int)fr.dwForwardMetric1, | |
2365 | (unsigned int)fr.dwForwardType); | |
2366 | ret = true; | |
2367 | goto doublebreak; | |
2368 | } | |
2369 | else if (status != ERROR_BAD_ARGUMENTS) | |
2370 | goto doublebreak; | |
2371 | } | |
2372 | } | |
6fbf66fa | 2373 | |
94a43500 JY |
2374 | doublebreak: |
2375 | if (status != NO_ERROR) | |
2376 | msg (M_WARN, "ROUTE: route addition failed using CreateIpForwardEntry: %s [status=%u if_index=%u]", | |
6fbf66fa | 2377 | strerror_win32 (status, &gc), |
94a43500 | 2378 | (unsigned int)status, |
6fbf66fa JY |
2379 | (unsigned int)if_index); |
2380 | } | |
2381 | } | |
2382 | ||
2383 | gc_free (&gc); | |
2384 | return ret; | |
2385 | } | |
2386 | ||
2387 | bool | |
b57e005b | 2388 | del_route_ipapi (const struct route_ipv4 *r, const struct tuntap *tt) |
6fbf66fa JY |
2389 | { |
2390 | struct gc_arena gc = gc_new (); | |
2391 | bool ret = false; | |
2392 | DWORD status; | |
2393 | const DWORD if_index = windows_route_find_if_index (r, tt); | |
2394 | ||
12e46092 | 2395 | if (if_index != TUN_ADAPTER_INDEX_INVALID) |
6fbf66fa JY |
2396 | { |
2397 | MIB_IPFORWARDROW fr; | |
2398 | CLEAR (fr); | |
2399 | ||
2400 | fr.dwForwardDest = htonl (r->network); | |
2401 | fr.dwForwardMask = htonl (r->netmask); | |
2402 | fr.dwForwardPolicy = 0; | |
2403 | fr.dwForwardNextHop = htonl (r->gateway); | |
2404 | fr.dwForwardIfIndex = if_index; | |
2405 | ||
2406 | status = DeleteIpForwardEntry (&fr); | |
2407 | ||
2408 | if (status == NO_ERROR) | |
2409 | ret = true; | |
2410 | else | |
2411 | msg (M_WARN, "ROUTE: route deletion failed using DeleteIpForwardEntry: %s", | |
2412 | strerror_win32 (status, &gc)); | |
2413 | } | |
2414 | ||
2415 | gc_free (&gc); | |
2416 | return ret; | |
2417 | } | |
2418 | ||
2419 | static const char * | |
2420 | format_route_entry (const MIB_IPFORWARDROW *r, struct gc_arena *gc) | |
2421 | { | |
2422 | struct buffer out = alloc_buf_gc (256, gc); | |
2423 | buf_printf (&out, "%s %s %s p=%d i=%d t=%d pr=%d a=%d h=%d m=%d/%d/%d/%d/%d", | |
2424 | print_in_addr_t (r->dwForwardDest, IA_NET_ORDER, gc), | |
2425 | print_in_addr_t (r->dwForwardMask, IA_NET_ORDER, gc), | |
2426 | print_in_addr_t (r->dwForwardNextHop, IA_NET_ORDER, gc), | |
2427 | (int)r->dwForwardPolicy, | |
2428 | (int)r->dwForwardIfIndex, | |
2429 | (int)r->dwForwardType, | |
2430 | (int)r->dwForwardProto, | |
2431 | (int)r->dwForwardAge, | |
2432 | (int)r->dwForwardNextHopAS, | |
2433 | (int)r->dwForwardMetric1, | |
2434 | (int)r->dwForwardMetric2, | |
2435 | (int)r->dwForwardMetric3, | |
2436 | (int)r->dwForwardMetric4, | |
2437 | (int)r->dwForwardMetric5); | |
2438 | return BSTR (&out); | |
2439 | } | |
2440 | ||
2441 | /* | |
2442 | * Show current routing table | |
2443 | */ | |
2444 | void | |
2445 | show_routes (int msglev) | |
2446 | { | |
2447 | struct gc_arena gc = gc_new (); | |
2448 | int i; | |
2449 | ||
2450 | const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc); | |
2451 | ||
2452 | msg (msglev, "SYSTEM ROUTING TABLE"); | |
2453 | if (rt) | |
2454 | { | |
2455 | for (i = 0; i < rt->dwNumEntries; ++i) | |
2456 | { | |
2457 | msg (msglev, "%s", format_route_entry (&rt->table[i], &gc)); | |
2458 | } | |
2459 | } | |
2460 | gc_free (&gc); | |
2461 | } | |
2462 | ||
a55b3cdb | 2463 | #elif defined(TARGET_LINUX) || defined(TARGET_ANDROID) |
6fbf66fa | 2464 | |
7fb0e07e JY |
2465 | void |
2466 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa JY |
2467 | { |
2468 | struct gc_arena gc = gc_new (); | |
7fb0e07e | 2469 | int sd = -1; |
8fc83a2d JY |
2470 | char best_name[16]; |
2471 | best_name[0] = 0; | |
7fb0e07e JY |
2472 | |
2473 | CLEAR(*rgi); | |
2474 | ||
2475 | /* get default gateway IP addr */ | |
2476 | { | |
2477 | FILE *fp = fopen ("/proc/net/route", "r"); | |
2478 | if (fp) | |
2479 | { | |
2480 | char line[256]; | |
2481 | int count = 0; | |
112731fc | 2482 | unsigned int lowest_metric = UINT_MAX; |
7fb0e07e | 2483 | in_addr_t best_gw = 0; |
8fc83a2d | 2484 | bool found = false; |
7fb0e07e JY |
2485 | while (fgets (line, sizeof (line), fp) != NULL) |
2486 | { | |
2487 | if (count) | |
2488 | { | |
2489 | unsigned int net_x = 0; | |
2490 | unsigned int mask_x = 0; | |
2491 | unsigned int gw_x = 0; | |
2492 | unsigned int metric = 0; | |
2493 | unsigned int flags = 0; | |
8fc83a2d JY |
2494 | char name[16]; |
2495 | name[0] = 0; | |
2496 | const int np = sscanf (line, "%15s\t%x\t%x\t%x\t%*s\t%*s\t%d\t%x", | |
2497 | name, | |
7fb0e07e JY |
2498 | &net_x, |
2499 | &gw_x, | |
2500 | &flags, | |
2501 | &metric, | |
2502 | &mask_x); | |
8fc83a2d | 2503 | if (np == 6 && (flags & IFF_UP)) |
7fb0e07e JY |
2504 | { |
2505 | const in_addr_t net = ntohl (net_x); | |
2506 | const in_addr_t mask = ntohl (mask_x); | |
2507 | const in_addr_t gw = ntohl (gw_x); | |
2508 | ||
2509 | if (!net && !mask && metric < lowest_metric) | |
2510 | { | |
8fc83a2d | 2511 | found = true; |
7fb0e07e | 2512 | best_gw = gw; |
8fc83a2d | 2513 | strcpy (best_name, name); |
7fb0e07e JY |
2514 | lowest_metric = metric; |
2515 | } | |
2516 | } | |
2517 | } | |
2518 | ++count; | |
2519 | } | |
2520 | fclose (fp); | |
2521 | ||
8fc83a2d | 2522 | if (found) |
7fb0e07e JY |
2523 | { |
2524 | rgi->gateway.addr = best_gw; | |
2525 | rgi->flags |= RGI_ADDR_DEFINED; | |
8fc83a2d JY |
2526 | if (!rgi->gateway.addr && best_name[0]) |
2527 | rgi->flags |= RGI_ON_LINK; | |
7fb0e07e JY |
2528 | } |
2529 | } | |
2530 | } | |
2531 | ||
2532 | /* scan adapter list */ | |
2533 | if (rgi->flags & RGI_ADDR_DEFINED) | |
2534 | { | |
2535 | struct ifreq *ifr, *ifend; | |
2536 | in_addr_t addr, netmask; | |
2537 | struct ifreq ifreq; | |
2538 | struct ifconf ifc; | |
2539 | struct ifreq ifs[20]; /* Maximum number of interfaces to scan */ | |
2540 | ||
2541 | if ((sd = socket (AF_INET, SOCK_DGRAM, 0)) < 0) | |
6fbf66fa | 2542 | { |
7fb0e07e JY |
2543 | msg (M_WARN, "GDG: socket() failed"); |
2544 | goto done; | |
2545 | } | |
2546 | ifc.ifc_len = sizeof (ifs); | |
2547 | ifc.ifc_req = ifs; | |
2548 | if (ioctl (sd, SIOCGIFCONF, &ifc) < 0) | |
2549 | { | |
2550 | msg (M_WARN, "GDG: ioctl(SIOCGIFCONF) failed"); | |
2551 | goto done; | |
6fbf66fa | 2552 | } |
c9241348 | 2553 | |
7fb0e07e JY |
2554 | /* scan through interface list */ |
2555 | ifend = ifs + (ifc.ifc_len / sizeof (struct ifreq)); | |
2556 | for (ifr = ifc.ifc_req; ifr < ifend; ifr++) | |
03653f42 | 2557 | { |
7fb0e07e | 2558 | if (ifr->ifr_addr.sa_family == AF_INET) |
f77c60d3 | 2559 | { |
7fb0e07e JY |
2560 | /* get interface addr */ |
2561 | addr = ntohl(((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr); | |
2562 | ||
2563 | /* get interface name */ | |
2564 | strncpynt (ifreq.ifr_name, ifr->ifr_name, sizeof (ifreq.ifr_name)); | |
2565 | ||
8fc83a2d | 2566 | /* check that the interface is up */ |
7fb0e07e JY |
2567 | if (ioctl (sd, SIOCGIFFLAGS, &ifreq) < 0) |
2568 | continue; | |
2569 | if (!(ifreq.ifr_flags & IFF_UP)) | |
2570 | continue; | |
2571 | ||
8fc83a2d JY |
2572 | if (rgi->flags & RGI_ON_LINK) |
2573 | { | |
2574 | /* check that interface name of current interface | |
2575 | matches interface name of best default route */ | |
2576 | if (strcmp(ifreq.ifr_name, best_name)) | |
2577 | continue; | |
2578 | #if 0 | |
2579 | /* if point-to-point link, use remote addr as route gateway */ | |
2580 | if ((ifreq.ifr_flags & IFF_POINTOPOINT) && ioctl (sd, SIOCGIFDSTADDR, &ifreq) >= 0) | |
2581 | { | |
2582 | rgi->gateway.addr = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr); | |
2583 | if (rgi->gateway.addr) | |
2584 | rgi->flags &= ~RGI_ON_LINK; | |
2585 | } | |
2586 | #endif | |
2587 | } | |
2588 | else | |
2589 | { | |
2590 | /* get interface netmask */ | |
2591 | if (ioctl (sd, SIOCGIFNETMASK, &ifreq) < 0) | |
2592 | continue; | |
2593 | netmask = ntohl(((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr.s_addr); | |
2594 | ||
2595 | /* check that interface matches default route */ | |
2596 | if (((rgi->gateway.addr ^ addr) & netmask) != 0) | |
2597 | continue; | |
2598 | ||
2599 | /* save netmask */ | |
2600 | rgi->gateway.netmask = netmask; | |
2601 | rgi->flags |= RGI_NETMASK_DEFINED; | |
2602 | } | |
7fb0e07e | 2603 | |
8fc83a2d | 2604 | /* save iface name */ |
7fb0e07e | 2605 | strncpynt (rgi->iface, ifreq.ifr_name, sizeof(rgi->iface)); |
8fc83a2d | 2606 | rgi->flags |= RGI_IFACE_DEFINED; |
576dc96c | 2607 | |
7fb0e07e JY |
2608 | /* now get the hardware address. */ |
2609 | memset (&ifreq.ifr_hwaddr, 0, sizeof (struct sockaddr)); | |
2610 | if (ioctl (sd, SIOCGIFHWADDR, &ifreq) < 0) | |
2611 | { | |
2612 | msg (M_WARN, "GDG: SIOCGIFHWADDR(%s) failed", ifreq.ifr_name); | |
2613 | goto done; | |
2614 | } | |
2615 | memcpy (rgi->hwaddr, &ifreq.ifr_hwaddr.sa_data, 6); | |
2616 | rgi->flags |= RGI_HWADDR_DEFINED; | |
2617 | ||
2618 | break; | |
f77c60d3 | 2619 | } |
03653f42 | 2620 | } |
6fbf66fa JY |
2621 | } |
2622 | ||
7fb0e07e JY |
2623 | done: |
2624 | if (sd >= 0) | |
2625 | close (sd); | |
6fbf66fa | 2626 | gc_free (&gc); |
6fbf66fa JY |
2627 | } |
2628 | ||
cab6305b GD |
2629 | #elif defined(TARGET_DARWIN) || \ |
2630 | defined(TARGET_FREEBSD) || defined(TARGET_DRAGONFLY) || \ | |
2631 | defined(TARGET_OPENBSD) || defined(TARGET_NETBSD) | |
6fbf66fa JY |
2632 | |
2633 | #include <sys/types.h> | |
2634 | #include <sys/socket.h> | |
2635 | #include <netinet/in.h> | |
6a8ea970 JY |
2636 | #include <net/route.h> |
2637 | #include <net/if_dl.h> | |
6fbf66fa | 2638 | |
6a8ea970 | 2639 | struct rtmsg { |
6fbf66fa JY |
2640 | struct rt_msghdr m_rtm; |
2641 | char m_space[512]; | |
6a8ea970 | 2642 | }; |
6fbf66fa | 2643 | |
cab6305b GD |
2644 | /* the route socket code is identical for all 4 supported BSDs and for |
2645 | * MacOS X (Darwin), with one crucial difference: when going from | |
2646 | * 32 bit to 64 bit, the BSDs increased the structure size but kept | |
2647 | * source code compatibility by keeping the use of "long", while | |
2648 | * MacOS X decided to keep binary compatibility by *changing* the API | |
2649 | * to use "uint32_t", thus 32 bit on all OS X variants | |
2650 | * | |
2651 | * We used to have a large amount of duplicate code here which really | |
2652 | * differed only in this (long) vs. (uint32_t) - IMHO, worse than | |
2653 | * having a combined block for all BSDs with this single #ifdef inside | |
2654 | */ | |
2655 | ||
2656 | #if defined(TARGET_DARWIN) | |
2657 | # define ROUNDUP(a) \ | |
3f7c03a2 | 2658 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(uint32_t) - 1))) : sizeof(uint32_t)) |
cab6305b GD |
2659 | #else |
2660 | # define ROUNDUP(a) \ | |
2661 | ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) | |
2662 | #endif | |
6fbf66fa | 2663 | |
7fb0e07e JY |
2664 | #define NEXTADDR(w, u) \ |
2665 | if (rtm_addrs & (w)) {\ | |
2666 | l = ROUNDUP(u.sa_len); memmove(cp, &(u), l); cp += l;\ | |
2667 | } | |
2668 | ||
2669 | #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) | |
2670 | ||
2671 | #define max(a,b) ((a) > (b) ? (a) : (b)) | |
2672 | ||
2673 | void | |
2674 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa JY |
2675 | { |
2676 | struct gc_arena gc = gc_new (); | |
6a8ea970 | 2677 | struct rtmsg m_rtmsg; |
7fb0e07e JY |
2678 | int sockfd = -1; |
2679 | int seq, l, pid, rtm_addrs, i; | |
6fbf66fa JY |
2680 | struct sockaddr so_dst, so_mask; |
2681 | char *cp = m_rtmsg.m_space; | |
6a8ea970 | 2682 | struct sockaddr *gate = NULL, *ifp = NULL, *sa; |
6fbf66fa JY |
2683 | struct rt_msghdr *rtm_aux; |
2684 | ||
7fb0e07e | 2685 | # define rtm m_rtmsg.m_rtm |
6fbf66fa | 2686 | |
7fb0e07e | 2687 | CLEAR(*rgi); |
6fbf66fa | 2688 | |
7fb0e07e | 2689 | /* setup data to send to routing socket */ |
6fbf66fa JY |
2690 | pid = getpid(); |
2691 | seq = 0; | |
6a8ea970 | 2692 | rtm_addrs = RTA_DST | RTA_NETMASK | RTA_IFP; |
6fbf66fa | 2693 | |
6a8ea970 | 2694 | bzero(&m_rtmsg, sizeof(m_rtmsg)); |
6fbf66fa JY |
2695 | bzero(&so_dst, sizeof(so_dst)); |
2696 | bzero(&so_mask, sizeof(so_mask)); | |
2697 | bzero(&rtm, sizeof(struct rt_msghdr)); | |
2698 | ||
2699 | rtm.rtm_type = RTM_GET; | |
2700 | rtm.rtm_flags = RTF_UP | RTF_GATEWAY; | |
2701 | rtm.rtm_version = RTM_VERSION; | |
2702 | rtm.rtm_seq = ++seq; | |
2703 | rtm.rtm_addrs = rtm_addrs; | |
2704 | ||
2705 | so_dst.sa_family = AF_INET; | |
2706 | so_dst.sa_len = sizeof(struct sockaddr_in); | |
2707 | so_mask.sa_family = AF_INET; | |
2708 | so_mask.sa_len = sizeof(struct sockaddr_in); | |
2709 | ||
2710 | NEXTADDR(RTA_DST, so_dst); | |
2711 | NEXTADDR(RTA_NETMASK, so_mask); | |
2712 | ||
2713 | rtm.rtm_msglen = l = cp - (char *)&m_rtmsg; | |
2714 | ||
7fb0e07e JY |
2715 | /* transact with routing socket */ |
2716 | sockfd = socket(PF_ROUTE, SOCK_RAW, 0); | |
2717 | if (sockfd < 0) | |
6fbf66fa | 2718 | { |
7fb0e07e JY |
2719 | msg (M_WARN, "GDG: socket #1 failed"); |
2720 | goto done; | |
2721 | } | |
2722 | if (write(sockfd, (char *)&m_rtmsg, l) < 0) | |
2723 | { | |
2724 | msg (M_WARN, "GDG: problem writing to routing socket"); | |
2725 | goto done; | |
6fbf66fa | 2726 | } |
6fbf66fa | 2727 | do { |
7fb0e07e | 2728 | l = read(sockfd, (char *)&m_rtmsg, sizeof(m_rtmsg)); |
6fbf66fa | 2729 | } while (l > 0 && (rtm.rtm_seq != seq || rtm.rtm_pid != pid)); |
7fb0e07e JY |
2730 | close(sockfd); |
2731 | sockfd = -1; | |
6fbf66fa | 2732 | |
7fb0e07e | 2733 | /* extract return data from routing socket */ |
6fbf66fa | 2734 | rtm_aux = &rtm; |
6fbf66fa | 2735 | cp = ((char *)(rtm_aux + 1)); |
7fb0e07e JY |
2736 | if (rtm_aux->rtm_addrs) |
2737 | { | |
2738 | for (i = 1; i; i <<= 1) | |
2739 | { | |
2740 | if (i & rtm_aux->rtm_addrs) | |
2741 | { | |
2742 | sa = (struct sockaddr *)cp; | |
2743 | if (i == RTA_GATEWAY ) | |
2744 | gate = sa; | |
2745 | else if (i == RTA_IFP) | |
2746 | ifp = sa; | |
2747 | ADVANCE(cp, sa); | |
2748 | } | |
2749 | } | |
2750 | } | |
6fbf66fa | 2751 | else |
7fb0e07e JY |
2752 | goto done; |
2753 | ||
2754 | /* get gateway addr and interface name */ | |
2755 | if (gate != NULL ) | |
6fbf66fa | 2756 | { |
7fb0e07e JY |
2757 | /* get default gateway addr */ |
2758 | rgi->gateway.addr = ntohl(((struct sockaddr_in *)gate)->sin_addr.s_addr); | |
2759 | if (rgi->gateway.addr) | |
2760 | rgi->flags |= RGI_ADDR_DEFINED; | |
2761 | ||
2762 | if (ifp) | |
2763 | { | |
2764 | /* get interface name */ | |
2765 | const struct sockaddr_dl *adl = (struct sockaddr_dl *) ifp; | |
7fb0e07e JY |
2766 | if (adl->sdl_nlen && adl->sdl_nlen < sizeof(rgi->iface)) |
2767 | { | |
2768 | memcpy (rgi->iface, adl->sdl_data, adl->sdl_nlen); | |
2769 | rgi->iface[adl->sdl_nlen] = '\0'; | |
2770 | rgi->flags |= RGI_IFACE_DEFINED; | |
2771 | } | |
2772 | } | |
6fbf66fa JY |
2773 | } |
2774 | ||
7fb0e07e JY |
2775 | /* get netmask of interface that owns default gateway */ |
2776 | if (rgi->flags & RGI_IFACE_DEFINED) { | |
2777 | struct ifreq ifr; | |
6fbf66fa | 2778 | |
7fb0e07e JY |
2779 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); |
2780 | if (sockfd < 0) | |
2781 | { | |
2782 | msg (M_WARN, "GDG: socket #2 failed"); | |
2783 | goto done; | |
2784 | } | |
2785 | ||
2786 | CLEAR(ifr); | |
2787 | ifr.ifr_addr.sa_family = AF_INET; | |
2788 | strncpynt(ifr.ifr_name, rgi->iface, IFNAMSIZ); | |
2789 | ||
2790 | if (ioctl(sockfd, SIOCGIFNETMASK, (char *)&ifr) < 0) | |
2791 | { | |
2792 | msg (M_WARN, "GDG: ioctl #1 failed"); | |
2793 | goto done; | |
2794 | } | |
2795 | close(sockfd); | |
2796 | sockfd = -1; | |
2797 | ||
2798 | rgi->gateway.netmask = ntohl(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr); | |
2799 | rgi->flags |= RGI_NETMASK_DEFINED; | |
2800 | } | |
2801 | ||
2802 | /* try to read MAC addr associated with interface that owns default gateway */ | |
2803 | if (rgi->flags & RGI_IFACE_DEFINED) | |
6fbf66fa | 2804 | { |
7fb0e07e JY |
2805 | struct ifconf ifc; |
2806 | struct ifreq *ifr; | |
2807 | const int bufsize = 4096; | |
2808 | char *buffer; | |
6fbf66fa | 2809 | |
7fb0e07e JY |
2810 | buffer = (char *) gc_malloc (bufsize, true, &gc); |
2811 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); | |
2812 | if (sockfd < 0) | |
f77c60d3 | 2813 | { |
7fb0e07e JY |
2814 | msg (M_WARN, "GDG: socket #3 failed"); |
2815 | goto done; | |
f77c60d3 JY |
2816 | } |
2817 | ||
7fb0e07e JY |
2818 | ifc.ifc_len = bufsize; |
2819 | ifc.ifc_buf = buffer; | |
2820 | ||
2821 | if (ioctl(sockfd, SIOCGIFCONF, (char *)&ifc) < 0) | |
6a8ea970 | 2822 | { |
7fb0e07e JY |
2823 | msg (M_WARN, "GDG: ioctl #2 failed"); |
2824 | goto done; | |
6a8ea970 | 2825 | } |
7fb0e07e JY |
2826 | close(sockfd); |
2827 | sockfd = -1; | |
6a8ea970 | 2828 | |
7fb0e07e JY |
2829 | for (cp = buffer; cp <= buffer + ifc.ifc_len - sizeof(struct ifreq); ) |
2830 | { | |
2831 | ifr = (struct ifreq *)cp; | |
2832 | const size_t len = sizeof(ifr->ifr_name) + max(sizeof(ifr->ifr_addr), ifr->ifr_addr.sa_len); | |
2833 | if (!ifr->ifr_addr.sa_family) | |
2834 | break; | |
2835 | if (!strncmp(ifr->ifr_name, rgi->iface, IFNAMSIZ)) | |
2836 | { | |
2837 | if (ifr->ifr_addr.sa_family == AF_LINK) | |
2838 | { | |
2839 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr; | |
2840 | memcpy(rgi->hwaddr, LLADDR(sdl), 6); | |
2841 | rgi->flags |= RGI_HWADDR_DEFINED; | |
2842 | } | |
2843 | } | |
2844 | cp += len; | |
2845 | } | |
6fbf66fa | 2846 | } |
6fbf66fa | 2847 | |
7fb0e07e JY |
2848 | done: |
2849 | if (sockfd >= 0) | |
2850 | close(sockfd); | |
2851 | gc_free (&gc); | |
6a8ea970 JY |
2852 | } |
2853 | ||
7fb0e07e JY |
2854 | #undef max |
2855 | ||
6fbf66fa JY |
2856 | #else |
2857 | ||
7fb0e07e JY |
2858 | /* |
2859 | * This is a platform-specific method that returns data about | |
2860 | * the current default gateway. Return data is placed into | |
2861 | * a struct route_gateway_info object provided by caller. The | |
2862 | * implementation should CLEAR the structure before adding | |
2863 | * data to it. | |
2864 | * | |
2865 | * Data returned includes: | |
2866 | * 1. default gateway address (rgi->gateway.addr) | |
2867 | * 2. netmask of interface that owns default gateway | |
2868 | * (rgi->gateway.netmask) | |
2869 | * 3. hardware address (i.e. MAC address) of interface that owns | |
2870 | * default gateway (rgi->hwaddr) | |
2871 | * 4. interface name (or adapter index on Windows) that owns default | |
2872 | * gateway (rgi->iface or rgi->adapter_index) | |
2873 | * 5. an array of additional address/netmask pairs defined by | |
2874 | * interface that owns default gateway (rgi->addrs with length | |
2875 | * given in rgi->n_addrs) | |
2876 | * | |
2877 | * The flags RGI_x_DEFINED may be used to indicate which of the data | |
2878 | * members were successfully returned (set in rgi->flags). All of | |
2879 | * the data members are optional, however certain OpenVPN functionality | |
2880 | * may be disabled by missing items. | |
2881 | */ | |
2882 | void | |
2883 | get_default_gateway (struct route_gateway_info *rgi) | |
6fbf66fa | 2884 | { |
7fb0e07e | 2885 | CLEAR(*rgi); |
6fbf66fa JY |
2886 | } |
2887 | ||
2888 | #endif | |
2889 | ||
2890 | bool | |
2891 | netmask_to_netbits (const in_addr_t network, const in_addr_t netmask, int *netbits) | |
2892 | { | |
2893 | int i; | |
2894 | const int addrlen = sizeof (in_addr_t) * 8; | |
2895 | ||
2896 | if ((network & netmask) == network) | |
2897 | { | |
2898 | for (i = 0; i <= addrlen; ++i) | |
2899 | { | |
2900 | in_addr_t mask = netbits_to_netmask (i); | |
2901 | if (mask == netmask) | |
2902 | { | |
2903 | if (i == addrlen) | |
2904 | *netbits = -1; | |
2905 | else | |
2906 | *netbits = i; | |
2907 | return true; | |
2908 | } | |
2909 | } | |
2910 | } | |
2911 | return false; | |
2912 | } | |
3c7f2f55 | 2913 | |
b4b92ae5 GD |
2914 | /* similar to netmask_to_netbits(), but don't mess with base address |
2915 | * etc., just convert to netbits - non-mappable masks are returned as "-1" | |
2916 | */ | |
2917 | int netmask_to_netbits2 (in_addr_t netmask) | |
2918 | { | |
2919 | int i; | |
2920 | const int addrlen = sizeof (in_addr_t) * 8; | |
2921 | ||
2922 | for (i = 0; i <= addrlen; ++i) | |
2923 | { | |
2924 | in_addr_t mask = netbits_to_netmask (i); | |
2925 | if (mask == netmask) | |
2926 | { | |
2927 | return i; | |
2928 | } | |
2929 | } | |
2930 | return -1; | |
2931 | } | |
2932 | ||
2933 | ||
3c7f2f55 JY |
2934 | /* |
2935 | * get_bypass_addresses() is used by the redirect-gateway bypass-x | |
2936 | * functions to build a route bypass to selected DHCP/DNS servers, | |
2937 | * so that outgoing packets to these servers don't end up in the tunnel. | |
2938 | */ | |
2939 | ||
2940 | #if defined(WIN32) | |
2941 | ||
2942 | static void | |
775a6ac2 | 2943 | add_host_route_if_nonlocal (struct route_bypass *rb, const in_addr_t addr) |
3c7f2f55 | 2944 | { |
32e576d2 | 2945 | if (test_local_addr(addr, NULL) == TLA_NONLOCAL && addr != 0 && addr != IPV4_NETMASK_HOST) |
d02a86d3 | 2946 | add_bypass_address (rb, addr); |
3c7f2f55 JY |
2947 | } |
2948 | ||
2949 | static void | |
775a6ac2 | 2950 | add_host_route_array (struct route_bypass *rb, const IP_ADDR_STRING *iplist) |
3c7f2f55 JY |
2951 | { |
2952 | while (iplist) | |
2953 | { | |
2954 | bool succeed = false; | |
2955 | const in_addr_t ip = getaddr (GETADDR_HOST_ORDER, iplist->IpAddress.String, 0, &succeed, NULL); | |
2956 | if (succeed) | |
2957 | { | |
775a6ac2 | 2958 | add_host_route_if_nonlocal (rb, ip); |
3c7f2f55 JY |
2959 | } |
2960 | iplist = iplist->Next; | |
2961 | } | |
2962 | } | |
2963 | ||
2964 | static void | |
2965 | get_bypass_addresses (struct route_bypass *rb, const unsigned int flags) | |
2966 | { | |
2967 | struct gc_arena gc = gc_new (); | |
c373382c | 2968 | /*bool ret_bool = false;*/ |
3c7f2f55 JY |
2969 | |
2970 | /* get full routing table */ | |
2971 | const MIB_IPFORWARDTABLE *routes = get_windows_routing_table (&gc); | |
2972 | ||
2973 | /* get the route which represents the default gateway */ | |
2974 | const MIB_IPFORWARDROW *row = get_default_gateway_row (routes); | |
2975 | ||
2976 | if (row) | |
2977 | { | |
2978 | /* get the adapter which the default gateway is associated with */ | |
2979 | const IP_ADAPTER_INFO *dgi = get_adapter_info (row->dwForwardIfIndex, &gc); | |
2980 | ||
2981 | /* get extra adapter info, such as DNS addresses */ | |
2982 | const IP_PER_ADAPTER_INFO *pai = get_per_adapter_info (row->dwForwardIfIndex, &gc); | |
2983 | ||
2984 | /* Bypass DHCP server address */ | |
2985 | if ((flags & RG_BYPASS_DHCP) && dgi && dgi->DhcpEnabled) | |
775a6ac2 | 2986 | add_host_route_array (rb, &dgi->DhcpServer); |
3c7f2f55 JY |
2987 | |
2988 | /* Bypass DNS server addresses */ | |
2989 | if ((flags & RG_BYPASS_DNS) && pai) | |
775a6ac2 | 2990 | add_host_route_array (rb, &pai->DnsServerList); |
3c7f2f55 JY |
2991 | } |
2992 | ||
2993 | gc_free (&gc); | |
2994 | } | |
2995 | ||
2996 | #else | |
2997 | ||
2998 | static void | |
c705be2a | 2999 | get_bypass_addresses (struct route_bypass *rb, const unsigned int flags) /* PLATFORM-SPECIFIC */ |
3c7f2f55 JY |
3000 | { |
3001 | } | |
3002 | ||
3003 | #endif | |
5f31881e | 3004 | |
775a6ac2 JY |
3005 | /* |
3006 | * Test if addr is reachable via a local interface (return ILA_LOCAL), | |
3007 | * or if it needs to be routed via the default gateway (return | |
3008 | * ILA_NONLOCAL). If the target platform doesn't implement this | |
3009 | * function, return ILA_NOT_IMPLEMENTED. | |
3010 | * | |
3011 | * Used by redirect-gateway autolocal feature | |
3012 | */ | |
3013 | ||
3014 | #if defined(WIN32) | |
3015 | ||
3016 | int | |
7fb0e07e | 3017 | test_local_addr (const in_addr_t addr, const struct route_gateway_info *rgi) |
775a6ac2 JY |
3018 | { |
3019 | struct gc_arena gc = gc_new (); | |
3020 | const in_addr_t nonlocal_netmask = 0x80000000L; /* routes with netmask <= to this are considered non-local */ | |
3021 | bool ret = TLA_NONLOCAL; | |
3022 | ||
3023 | /* get full routing table */ | |
3024 | const MIB_IPFORWARDTABLE *rt = get_windows_routing_table (&gc); | |
3025 | if (rt) | |
3026 | { | |
3027 | int i; | |
3028 | for (i = 0; i < rt->dwNumEntries; ++i) | |
3029 | { | |
3030 | const MIB_IPFORWARDROW *row = &rt->table[i]; | |
3031 | const in_addr_t net = ntohl (row->dwForwardDest); | |
3032 | const in_addr_t mask = ntohl (row->dwForwardMask); | |
3033 | if (mask > nonlocal_netmask && (addr & mask) == net) | |
3034 | { | |
3035 | ret = TLA_LOCAL; | |
3036 | break; | |
3037 | } | |
3038 | } | |
3039 | } | |
3040 | ||
3041 | gc_free (&gc); | |
3042 | return ret; | |
3043 | } | |
3044 | ||
3045 | #else | |
3046 | ||
775a6ac2 | 3047 | int |
7fb0e07e | 3048 | test_local_addr (const in_addr_t addr, const struct route_gateway_info *rgi) /* PLATFORM-SPECIFIC */ |
775a6ac2 | 3049 | { |
7fb0e07e JY |
3050 | if (rgi) |
3051 | { | |
3052 | if (local_route (addr, 0xFFFFFFFF, rgi->gateway.addr, rgi)) | |
3053 | return TLA_LOCAL; | |
3054 | else | |
3055 | return TLA_NONLOCAL; | |
3056 | } | |
775a6ac2 JY |
3057 | return TLA_NOT_IMPLEMENTED; |
3058 | } | |
3059 | ||
3060 | #endif |