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Commit | Line | Data |
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d506b89c | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
e5719363 | 2 | /*** |
96b2fb93 | 3 | Copyright © 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. |
e5719363 JT |
4 | ***/ |
5 | ||
6 | #include <sys/ioctl.h> | |
7 | #include <net/if.h> | |
8 | ||
8173d1d0 YW |
9 | #include "sd-resolve.h" |
10 | ||
e5719363 | 11 | #include "alloc-util.h" |
e5719363 | 12 | #include "fd-util.h" |
e5719363 | 13 | #include "hexdecoct.h" |
e5719363 | 14 | #include "networkd-link.h" |
e5719363 | 15 | #include "networkd-manager.h" |
a4c9ae40 YW |
16 | #include "networkd-util.h" |
17 | #include "parse-util.h" | |
1061dab1 | 18 | #include "resolve-private.h" |
a4c9ae40 YW |
19 | #include "string-util.h" |
20 | #include "strv.h" | |
21 | #include "wireguard.h" | |
e5719363 JT |
22 | #include "wireguard-netlink.h" |
23 | ||
24 | static void resolve_endpoints(NetDev *netdev); | |
25 | ||
26 | static WireguardPeer *wireguard_peer_new(Wireguard *w, unsigned section) { | |
27 | WireguardPeer *peer; | |
28 | ||
29 | assert(w); | |
30 | ||
31 | if (w->last_peer_section == section && w->peers) | |
32 | return w->peers; | |
33 | ||
fc721553 | 34 | peer = new(WireguardPeer, 1); |
e5719363 JT |
35 | if (!peer) |
36 | return NULL; | |
fc721553 YW |
37 | |
38 | *peer = (WireguardPeer) { | |
39 | .flags = WGPEER_F_REPLACE_ALLOWEDIPS, | |
40 | }; | |
e5719363 JT |
41 | |
42 | LIST_PREPEND(peers, w->peers, peer); | |
43 | w->last_peer_section = section; | |
44 | ||
45 | return peer; | |
46 | } | |
47 | ||
e1f717d4 | 48 | static int wireguard_set_ipmask_one(NetDev *netdev, sd_netlink_message *message, const WireguardIPmask *mask, uint16_t index) { |
e5719363 | 49 | int r; |
e1f717d4 YW |
50 | |
51 | assert(message); | |
52 | assert(mask); | |
53 | assert(index > 0); | |
54 | ||
55 | /* This returns 1 on success, 0 on recoverable error, and negative errno on failure. */ | |
56 | ||
57 | r = sd_netlink_message_open_array(message, index); | |
58 | if (r < 0) | |
59 | return 0; | |
60 | ||
61 | r = sd_netlink_message_append_u16(message, WGALLOWEDIP_A_FAMILY, mask->family); | |
62 | if (r < 0) | |
63 | goto cancel; | |
64 | ||
65 | if (mask->family == AF_INET) | |
66 | r = sd_netlink_message_append_in_addr(message, WGALLOWEDIP_A_IPADDR, &mask->ip.in); | |
67 | else if (mask->family == AF_INET6) | |
68 | r = sd_netlink_message_append_in6_addr(message, WGALLOWEDIP_A_IPADDR, &mask->ip.in6); | |
69 | if (r < 0) | |
70 | goto cancel; | |
71 | ||
72 | r = sd_netlink_message_append_u8(message, WGALLOWEDIP_A_CIDR_MASK, mask->cidr); | |
73 | if (r < 0) | |
74 | goto cancel; | |
75 | ||
76 | r = sd_netlink_message_close_container(message); | |
77 | if (r < 0) | |
78 | return log_netdev_error_errno(netdev, r, "Could not add wireguard allowed ip: %m"); | |
79 | ||
80 | return 1; | |
81 | ||
82 | cancel: | |
83 | r = sd_netlink_message_cancel_array(message); | |
84 | if (r < 0) | |
85 | return log_netdev_error_errno(netdev, r, "Could not cancel wireguard allowed ip message attribute: %m"); | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
90 | static int wireguard_set_peer_one(NetDev *netdev, sd_netlink_message *message, const WireguardPeer *peer, uint16_t index, WireguardIPmask **mask_start) { | |
91 | WireguardIPmask *mask, *start; | |
92 | uint16_t j = 0; | |
93 | int r; | |
94 | ||
95 | assert(message); | |
96 | assert(peer); | |
97 | assert(index > 0); | |
98 | assert(mask_start); | |
99 | ||
100 | /* This returns 1 on success, 0 on recoverable error, and negative errno on failure. */ | |
101 | ||
102 | start = *mask_start ?: peer->ipmasks; | |
103 | ||
104 | r = sd_netlink_message_open_array(message, index); | |
105 | if (r < 0) | |
106 | return 0; | |
107 | ||
108 | r = sd_netlink_message_append_data(message, WGPEER_A_PUBLIC_KEY, &peer->public_key, sizeof(peer->public_key)); | |
109 | if (r < 0) | |
110 | goto cancel; | |
111 | ||
112 | if (!start) { | |
113 | r = sd_netlink_message_append_data(message, WGPEER_A_PRESHARED_KEY, &peer->preshared_key, WG_KEY_LEN); | |
114 | if (r < 0) | |
115 | goto cancel; | |
116 | ||
117 | r = sd_netlink_message_append_u32(message, WGPEER_A_FLAGS, peer->flags); | |
118 | if (r < 0) | |
119 | goto cancel; | |
120 | ||
121 | r = sd_netlink_message_append_u16(message, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, peer->persistent_keepalive_interval); | |
122 | if (r < 0) | |
123 | goto cancel; | |
124 | ||
125 | if (peer->endpoint.sa.sa_family == AF_INET) | |
126 | r = sd_netlink_message_append_data(message, WGPEER_A_ENDPOINT, &peer->endpoint.in, sizeof(peer->endpoint.in)); | |
127 | else if (peer->endpoint.sa.sa_family == AF_INET6) | |
128 | r = sd_netlink_message_append_data(message, WGPEER_A_ENDPOINT, &peer->endpoint.in6, sizeof(peer->endpoint.in6)); | |
129 | if (r < 0) | |
130 | goto cancel; | |
131 | } | |
132 | ||
133 | r = sd_netlink_message_open_container(message, WGPEER_A_ALLOWEDIPS); | |
134 | if (r < 0) | |
135 | goto cancel; | |
136 | ||
137 | LIST_FOREACH(ipmasks, mask, start) { | |
138 | r = wireguard_set_ipmask_one(netdev, message, mask, ++j); | |
139 | if (r < 0) | |
140 | return r; | |
141 | if (r == 0) | |
142 | break; | |
143 | } | |
144 | ||
145 | r = sd_netlink_message_close_container(message); | |
146 | if (r < 0) | |
147 | return log_netdev_error_errno(netdev, r, "Could not add wireguard allowed ip: %m"); | |
148 | ||
149 | r = sd_netlink_message_close_container(message); | |
150 | if (r < 0) | |
151 | return log_netdev_error_errno(netdev, r, "Could not add wireguard peer: %m"); | |
152 | ||
153 | *mask_start = mask; /* Start next cycle from this mask. */ | |
154 | return !mask; | |
155 | ||
156 | cancel: | |
157 | r = sd_netlink_message_cancel_array(message); | |
158 | if (r < 0) | |
159 | return log_netdev_error_errno(netdev, r, "Could not cancel wireguard peers: %m"); | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static int wireguard_set_interface(NetDev *netdev) { | |
e5719363 | 165 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL; |
e1f717d4 YW |
166 | WireguardIPmask *mask_start = NULL; |
167 | WireguardPeer *peer, *peer_start; | |
e5719363 | 168 | uint32_t serial; |
e1f717d4 YW |
169 | Wireguard *w; |
170 | int r; | |
e5719363 JT |
171 | |
172 | assert(netdev); | |
173 | w = WIREGUARD(netdev); | |
174 | assert(w); | |
175 | ||
e1f717d4 YW |
176 | for (peer_start = w->peers; peer_start; ) { |
177 | uint16_t i = 0; | |
e5719363 | 178 | |
e5719363 JT |
179 | message = sd_netlink_message_unref(message); |
180 | ||
181 | r = sd_genl_message_new(netdev->manager->genl, SD_GENL_WIREGUARD, WG_CMD_SET_DEVICE, &message); | |
182 | if (r < 0) | |
183 | return log_netdev_error_errno(netdev, r, "Failed to allocate generic netlink message: %m"); | |
184 | ||
185 | r = sd_netlink_message_append_string(message, WGDEVICE_A_IFNAME, netdev->ifname); | |
186 | if (r < 0) | |
187 | return log_netdev_error_errno(netdev, r, "Could not append wireguard interface name: %m"); | |
188 | ||
189 | if (peer_start == w->peers) { | |
190 | r = sd_netlink_message_append_data(message, WGDEVICE_A_PRIVATE_KEY, &w->private_key, WG_KEY_LEN); | |
191 | if (r < 0) | |
192 | return log_netdev_error_errno(netdev, r, "Could not append wireguard private key: %m"); | |
193 | ||
194 | r = sd_netlink_message_append_u16(message, WGDEVICE_A_LISTEN_PORT, w->port); | |
195 | if (r < 0) | |
196 | return log_netdev_error_errno(netdev, r, "Could not append wireguard port: %m"); | |
197 | ||
198 | r = sd_netlink_message_append_u32(message, WGDEVICE_A_FWMARK, w->fwmark); | |
199 | if (r < 0) | |
200 | return log_netdev_error_errno(netdev, r, "Could not append wireguard fwmark: %m"); | |
201 | ||
202 | r = sd_netlink_message_append_u32(message, WGDEVICE_A_FLAGS, w->flags); | |
203 | if (r < 0) | |
204 | return log_netdev_error_errno(netdev, r, "Could not append wireguard flags: %m"); | |
205 | } | |
206 | ||
207 | r = sd_netlink_message_open_container(message, WGDEVICE_A_PEERS); | |
208 | if (r < 0) | |
209 | return log_netdev_error_errno(netdev, r, "Could not append wireguard peer attributes: %m"); | |
210 | ||
e5719363 | 211 | LIST_FOREACH(peers, peer, peer_start) { |
e1f717d4 | 212 | r = wireguard_set_peer_one(netdev, message, peer, ++i, &mask_start); |
e5719363 | 213 | if (r < 0) |
e1f717d4 YW |
214 | return r; |
215 | if (r == 0) | |
e5719363 | 216 | break; |
e5719363 | 217 | } |
e1f717d4 | 218 | peer_start = peer; /* Start next cycle from this peer. */ |
e5719363 JT |
219 | |
220 | r = sd_netlink_message_close_container(message); | |
221 | if (r < 0) | |
222 | return log_netdev_error_errno(netdev, r, "Could not close wireguard container: %m"); | |
223 | ||
224 | r = sd_netlink_send(netdev->manager->genl, message, &serial); | |
225 | if (r < 0) | |
226 | return log_netdev_error_errno(netdev, r, "Could not set wireguard device: %m"); | |
e1f717d4 | 227 | } |
e5719363 JT |
228 | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static WireguardEndpoint* wireguard_endpoint_free(WireguardEndpoint *e) { | |
233 | if (!e) | |
234 | return NULL; | |
e5719363 JT |
235 | e->host = mfree(e->host); |
236 | e->port = mfree(e->port); | |
237 | return mfree(e); | |
238 | } | |
239 | ||
1061dab1 | 240 | static void wireguard_endpoint_destroy_callback(WireguardEndpoint *e) { |
8173d1d0 YW |
241 | assert(e); |
242 | assert(e->netdev); | |
243 | ||
244 | netdev_unref(e->netdev); | |
245 | wireguard_endpoint_free(e); | |
246 | } | |
247 | ||
e5719363 JT |
248 | DEFINE_TRIVIAL_CLEANUP_FUNC(WireguardEndpoint*, wireguard_endpoint_free); |
249 | ||
250 | static int on_resolve_retry(sd_event_source *s, usec_t usec, void *userdata) { | |
251 | NetDev *netdev = userdata; | |
252 | Wireguard *w; | |
253 | ||
254 | assert(netdev); | |
255 | w = WIREGUARD(netdev); | |
256 | assert(w); | |
257 | ||
9e2bbf99 | 258 | if (!netdev_is_managed(netdev)) |
56ba90c2 | 259 | return 0; |
e5719363 | 260 | |
56ba90c2 | 261 | assert(!w->unresolved_endpoints); |
ae2a15bc | 262 | w->unresolved_endpoints = TAKE_PTR(w->failed_endpoints); |
e5719363 JT |
263 | |
264 | resolve_endpoints(netdev); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Given the number of retries this function will return will an exponential | |
271 | * increasing time in milliseconds to wait starting at 200ms and capped at 25 seconds. | |
272 | */ | |
273 | static int exponential_backoff_milliseconds(unsigned n_retries) { | |
274 | return (2 << MAX(n_retries, 7U)) * 100 * USEC_PER_MSEC; | |
275 | } | |
276 | ||
277 | static int wireguard_resolve_handler(sd_resolve_query *q, | |
278 | int ret, | |
279 | const struct addrinfo *ai, | |
1061dab1 | 280 | WireguardEndpoint *e) { |
8173d1d0 | 281 | _cleanup_(netdev_unrefp) NetDev *netdev_will_unrefed = NULL; |
1061dab1 | 282 | NetDev *netdev; |
e5719363 | 283 | Wireguard *w; |
e5719363 JT |
284 | int r; |
285 | ||
1061dab1 YW |
286 | assert(e); |
287 | assert(e->netdev); | |
e5719363 | 288 | |
1061dab1 | 289 | netdev = e->netdev; |
e5719363 JT |
290 | w = WIREGUARD(netdev); |
291 | assert(w); | |
292 | ||
9e2bbf99 | 293 | if (!netdev_is_managed(netdev)) |
8173d1d0 | 294 | return 0; |
e5719363 JT |
295 | |
296 | if (ret != 0) { | |
297 | log_netdev_error(netdev, "Failed to resolve host '%s:%s': %s", e->host, e->port, gai_strerror(ret)); | |
298 | LIST_PREPEND(endpoints, w->failed_endpoints, e); | |
8173d1d0 YW |
299 | (void) sd_resolve_query_set_destroy_callback(q, NULL); /* Avoid freeing endpoint by destroy callback. */ |
300 | netdev_will_unrefed = netdev; /* But netdev needs to be unrefed. */ | |
e5719363 | 301 | } else if ((ai->ai_family == AF_INET && ai->ai_addrlen == sizeof(struct sockaddr_in)) || |
8173d1d0 | 302 | (ai->ai_family == AF_INET6 && ai->ai_addrlen == sizeof(struct sockaddr_in6))) |
e5719363 JT |
303 | memcpy(&e->peer->endpoint, ai->ai_addr, ai->ai_addrlen); |
304 | else | |
305 | log_netdev_error(netdev, "Neither IPv4 nor IPv6 address found for peer endpoint: %s:%s", e->host, e->port); | |
306 | ||
307 | if (w->unresolved_endpoints) { | |
308 | resolve_endpoints(netdev); | |
309 | return 0; | |
310 | } | |
311 | ||
e1f717d4 | 312 | (void) wireguard_set_interface(netdev); |
e5719363 | 313 | if (w->failed_endpoints) { |
56ba90c2 YW |
314 | _cleanup_(sd_event_source_unrefp) sd_event_source *s = NULL; |
315 | ||
e5719363 JT |
316 | w->n_retries++; |
317 | r = sd_event_add_time(netdev->manager->event, | |
56ba90c2 | 318 | &s, |
e5719363 JT |
319 | CLOCK_MONOTONIC, |
320 | now(CLOCK_MONOTONIC) + exponential_backoff_milliseconds(w->n_retries), | |
321 | 0, | |
322 | on_resolve_retry, | |
323 | netdev); | |
56ba90c2 | 324 | if (r < 0) { |
e5719363 | 325 | log_netdev_warning_errno(netdev, r, "Could not arm resolve retry handler: %m"); |
56ba90c2 YW |
326 | return 0; |
327 | } | |
328 | ||
302a796f | 329 | r = sd_event_source_set_destroy_callback(s, (sd_event_destroy_t) netdev_destroy_callback); |
56ba90c2 YW |
330 | if (r < 0) { |
331 | log_netdev_warning_errno(netdev, r, "Failed to set destroy callback to event source: %m"); | |
332 | return 0; | |
333 | } | |
334 | ||
335 | (void) sd_event_source_set_floating(s, true); | |
336 | netdev_ref(netdev); | |
e5719363 JT |
337 | } |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static void resolve_endpoints(NetDev *netdev) { | |
e5719363 JT |
343 | static const struct addrinfo hints = { |
344 | .ai_family = AF_UNSPEC, | |
345 | .ai_socktype = SOCK_DGRAM, | |
346 | .ai_protocol = IPPROTO_UDP | |
347 | }; | |
8173d1d0 YW |
348 | WireguardEndpoint *endpoint; |
349 | Wireguard *w; | |
350 | int r = 0; | |
e5719363 JT |
351 | |
352 | assert(netdev); | |
353 | w = WIREGUARD(netdev); | |
354 | assert(w); | |
355 | ||
356 | LIST_FOREACH(endpoints, endpoint, w->unresolved_endpoints) { | |
1061dab1 YW |
357 | r = resolve_getaddrinfo(netdev->manager->resolve, |
358 | NULL, | |
359 | endpoint->host, | |
360 | endpoint->port, | |
361 | &hints, | |
362 | wireguard_resolve_handler, | |
363 | wireguard_endpoint_destroy_callback, | |
364 | endpoint); | |
e5719363 JT |
365 | |
366 | if (r == -ENOBUFS) | |
367 | break; | |
8173d1d0 YW |
368 | if (r < 0) { |
369 | log_netdev_error_errno(netdev, r, "Failed to create resolver: %m"); | |
370 | continue; | |
371 | } | |
e5719363 | 372 | |
8173d1d0 YW |
373 | /* Avoid freeing netdev. It will be unrefed by the destroy callback. */ |
374 | netdev_ref(netdev); | |
375 | ||
376 | LIST_REMOVE(endpoints, w->unresolved_endpoints, endpoint); | |
e5719363 JT |
377 | } |
378 | } | |
379 | ||
e5719363 JT |
380 | static int netdev_wireguard_post_create(NetDev *netdev, Link *link, sd_netlink_message *m) { |
381 | Wireguard *w; | |
382 | ||
383 | assert(netdev); | |
384 | w = WIREGUARD(netdev); | |
385 | assert(w); | |
386 | ||
e1f717d4 | 387 | (void) wireguard_set_interface(netdev); |
e5719363 JT |
388 | resolve_endpoints(netdev); |
389 | return 0; | |
390 | } | |
391 | ||
392 | int config_parse_wireguard_listen_port(const char *unit, | |
393 | const char *filename, | |
394 | unsigned line, | |
395 | const char *section, | |
396 | unsigned section_line, | |
397 | const char *lvalue, | |
398 | int ltype, | |
399 | const char *rvalue, | |
400 | void *data, | |
401 | void *userdata) { | |
402 | uint16_t *s = data; | |
403 | uint16_t port = 0; | |
404 | int r; | |
405 | ||
406 | assert(rvalue); | |
407 | assert(data); | |
408 | ||
409 | if (!streq(rvalue, "auto")) { | |
410 | r = parse_ip_port(rvalue, &port); | |
411 | if (r < 0) | |
412 | log_syntax(unit, LOG_ERR, filename, line, r, "Invalid port specification, ignoring assignment: %s", rvalue); | |
413 | } | |
414 | ||
415 | *s = port; | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | static int parse_wireguard_key(const char *unit, | |
421 | const char *filename, | |
422 | unsigned line, | |
423 | const char *section, | |
424 | unsigned section_line, | |
425 | const char *lvalue, | |
426 | int ltype, | |
427 | const char *rvalue, | |
428 | void *data, | |
429 | void *userdata) { | |
430 | _cleanup_free_ void *key = NULL; | |
431 | size_t len; | |
432 | int r; | |
433 | ||
434 | assert(filename); | |
435 | assert(rvalue); | |
436 | assert(userdata); | |
437 | ||
438 | r = unbase64mem(rvalue, strlen(rvalue), &key, &len); | |
439 | if (r < 0) { | |
440 | log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse wireguard key \"%s\", ignoring assignment: %m", rvalue); | |
441 | return 0; | |
442 | } | |
443 | if (len != WG_KEY_LEN) { | |
444 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
445 | "Wireguard key is too short, ignoring assignment: %s", rvalue); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | memcpy(userdata, key, WG_KEY_LEN); | |
450 | return true; | |
451 | } | |
452 | ||
453 | int config_parse_wireguard_private_key(const char *unit, | |
454 | const char *filename, | |
455 | unsigned line, | |
456 | const char *section, | |
457 | unsigned section_line, | |
458 | const char *lvalue, | |
459 | int ltype, | |
460 | const char *rvalue, | |
461 | void *data, | |
462 | void *userdata) { | |
463 | Wireguard *w; | |
464 | ||
465 | assert(data); | |
466 | ||
467 | w = WIREGUARD(data); | |
468 | ||
469 | assert(w); | |
470 | ||
471 | return parse_wireguard_key(unit, | |
472 | filename, | |
473 | line, | |
474 | section, | |
475 | section_line, | |
476 | lvalue, | |
477 | ltype, | |
478 | rvalue, | |
479 | data, | |
480 | &w->private_key); | |
481 | ||
482 | } | |
483 | ||
484 | int config_parse_wireguard_preshared_key(const char *unit, | |
485 | const char *filename, | |
486 | unsigned line, | |
487 | const char *section, | |
488 | unsigned section_line, | |
489 | const char *lvalue, | |
490 | int ltype, | |
491 | const char *rvalue, | |
492 | void *data, | |
493 | void *userdata) { | |
494 | Wireguard *w; | |
495 | WireguardPeer *peer; | |
496 | ||
497 | assert(data); | |
498 | ||
499 | w = WIREGUARD(data); | |
500 | ||
501 | assert(w); | |
502 | ||
503 | peer = wireguard_peer_new(w, section_line); | |
504 | if (!peer) | |
505 | return log_oom(); | |
506 | ||
507 | return parse_wireguard_key(unit, | |
508 | filename, | |
509 | line, | |
510 | section, | |
511 | section_line, | |
512 | lvalue, | |
513 | ltype, | |
514 | rvalue, | |
515 | data, | |
516 | peer->preshared_key); | |
517 | } | |
518 | ||
e5719363 JT |
519 | int config_parse_wireguard_public_key(const char *unit, |
520 | const char *filename, | |
521 | unsigned line, | |
522 | const char *section, | |
523 | unsigned section_line, | |
524 | const char *lvalue, | |
525 | int ltype, | |
526 | const char *rvalue, | |
527 | void *data, | |
528 | void *userdata) { | |
529 | Wireguard *w; | |
530 | WireguardPeer *peer; | |
531 | ||
532 | assert(data); | |
533 | ||
534 | w = WIREGUARD(data); | |
535 | ||
536 | assert(w); | |
537 | ||
538 | peer = wireguard_peer_new(w, section_line); | |
539 | if (!peer) | |
540 | return log_oom(); | |
541 | ||
542 | return parse_wireguard_key(unit, | |
543 | filename, | |
544 | line, | |
545 | section, | |
546 | section_line, | |
547 | lvalue, | |
548 | ltype, | |
549 | rvalue, | |
550 | data, | |
551 | peer->public_key); | |
552 | } | |
553 | ||
554 | int config_parse_wireguard_allowed_ips(const char *unit, | |
555 | const char *filename, | |
556 | unsigned line, | |
557 | const char *section, | |
558 | unsigned section_line, | |
559 | const char *lvalue, | |
560 | int ltype, | |
561 | const char *rvalue, | |
562 | void *data, | |
563 | void *userdata) { | |
564 | union in_addr_union addr; | |
565 | unsigned char prefixlen; | |
566 | int r, family; | |
567 | Wireguard *w; | |
568 | WireguardPeer *peer; | |
569 | WireguardIPmask *ipmask; | |
570 | ||
571 | assert(rvalue); | |
572 | assert(data); | |
573 | ||
574 | w = WIREGUARD(data); | |
575 | ||
576 | peer = wireguard_peer_new(w, section_line); | |
577 | if (!peer) | |
578 | return log_oom(); | |
579 | ||
580 | for (;;) { | |
581 | _cleanup_free_ char *word = NULL; | |
582 | ||
583 | r = extract_first_word(&rvalue, &word, "," WHITESPACE, 0); | |
584 | if (r == 0) | |
585 | break; | |
586 | if (r == -ENOMEM) | |
587 | return log_oom(); | |
588 | if (r < 0) { | |
589 | log_syntax(unit, LOG_ERR, filename, line, r, "Failed to split allowed ips \"%s\" option: %m", rvalue); | |
590 | break; | |
591 | } | |
592 | ||
593 | r = in_addr_prefix_from_string_auto(word, &family, &addr, &prefixlen); | |
594 | if (r < 0) { | |
595 | log_syntax(unit, LOG_ERR, filename, line, r, "Network address is invalid, ignoring assignment: %s", word); | |
596 | return 0; | |
597 | } | |
598 | ||
fc721553 | 599 | ipmask = new(WireguardIPmask, 1); |
e5719363 JT |
600 | if (!ipmask) |
601 | return log_oom(); | |
fc721553 YW |
602 | |
603 | *ipmask = (WireguardIPmask) { | |
604 | .family = family, | |
605 | .ip.in6 = addr.in6, | |
606 | .cidr = prefixlen, | |
607 | }; | |
e5719363 JT |
608 | |
609 | LIST_PREPEND(ipmasks, peer->ipmasks, ipmask); | |
610 | } | |
611 | ||
612 | return 0; | |
613 | } | |
614 | ||
615 | int config_parse_wireguard_endpoint(const char *unit, | |
616 | const char *filename, | |
617 | unsigned line, | |
618 | const char *section, | |
619 | unsigned section_line, | |
620 | const char *lvalue, | |
621 | int ltype, | |
622 | const char *rvalue, | |
623 | void *data, | |
624 | void *userdata) { | |
625 | Wireguard *w; | |
626 | WireguardPeer *peer; | |
627 | size_t len; | |
628 | const char *begin, *end = NULL; | |
629 | _cleanup_free_ char *host = NULL, *port = NULL; | |
630 | _cleanup_(wireguard_endpoint_freep) WireguardEndpoint *endpoint = NULL; | |
631 | ||
632 | assert(data); | |
633 | assert(rvalue); | |
634 | ||
635 | w = WIREGUARD(data); | |
636 | ||
637 | assert(w); | |
638 | ||
639 | peer = wireguard_peer_new(w, section_line); | |
640 | if (!peer) | |
641 | return log_oom(); | |
642 | ||
e5719363 JT |
643 | if (rvalue[0] == '[') { |
644 | begin = &rvalue[1]; | |
645 | end = strchr(rvalue, ']'); | |
646 | if (!end) { | |
647 | log_syntax(unit, LOG_ERR, filename, line, 0, "Unable to find matching brace of endpoint, ignoring assignment: %s", rvalue); | |
648 | return 0; | |
649 | } | |
650 | len = end - begin; | |
651 | ++end; | |
652 | if (*end != ':' || !*(end + 1)) { | |
653 | log_syntax(unit, LOG_ERR, filename, line, 0, "Unable to find port of endpoint: %s", rvalue); | |
654 | return 0; | |
655 | } | |
656 | ++end; | |
657 | } else { | |
658 | begin = rvalue; | |
659 | end = strrchr(rvalue, ':'); | |
660 | if (!end || !*(end + 1)) { | |
661 | log_syntax(unit, LOG_ERR, filename, line, 0, "Unable to find port of endpoint: %s", rvalue); | |
662 | return 0; | |
663 | } | |
664 | len = end - begin; | |
665 | ++end; | |
666 | } | |
667 | ||
668 | host = strndup(begin, len); | |
669 | if (!host) | |
670 | return log_oom(); | |
671 | ||
672 | port = strdup(end); | |
673 | if (!port) | |
674 | return log_oom(); | |
675 | ||
fc721553 YW |
676 | endpoint = new(WireguardEndpoint, 1); |
677 | if (!endpoint) | |
678 | return log_oom(); | |
679 | ||
680 | *endpoint = (WireguardEndpoint) { | |
681 | .peer = TAKE_PTR(peer), | |
682 | .host = TAKE_PTR(host), | |
683 | .port = TAKE_PTR(port), | |
684 | .netdev = data, | |
685 | }; | |
8173d1d0 | 686 | LIST_PREPEND(endpoints, w->unresolved_endpoints, TAKE_PTR(endpoint)); |
e5719363 JT |
687 | |
688 | return 0; | |
689 | } | |
690 | ||
691 | int config_parse_wireguard_keepalive(const char *unit, | |
692 | const char *filename, | |
693 | unsigned line, | |
694 | const char *section, | |
695 | unsigned section_line, | |
696 | const char *lvalue, | |
697 | int ltype, | |
698 | const char *rvalue, | |
699 | void *data, | |
700 | void *userdata) { | |
701 | int r; | |
702 | uint16_t keepalive = 0; | |
703 | Wireguard *w; | |
704 | WireguardPeer *peer; | |
705 | ||
706 | assert(rvalue); | |
707 | assert(data); | |
708 | ||
709 | w = WIREGUARD(data); | |
710 | ||
711 | assert(w); | |
712 | ||
713 | peer = wireguard_peer_new(w, section_line); | |
714 | if (!peer) | |
715 | return log_oom(); | |
716 | ||
717 | if (streq(rvalue, "off")) | |
718 | keepalive = 0; | |
719 | else { | |
720 | r = safe_atou16(rvalue, &keepalive); | |
721 | if (r < 0) | |
722 | log_syntax(unit, LOG_ERR, filename, line, r, "The persistent keepalive interval must be 0-65535. Ignore assignment: %s", rvalue); | |
723 | } | |
724 | ||
725 | peer->persistent_keepalive_interval = keepalive; | |
726 | return 0; | |
727 | } | |
728 | ||
729 | static void wireguard_init(NetDev *netdev) { | |
730 | Wireguard *w; | |
731 | ||
732 | assert(netdev); | |
733 | ||
734 | w = WIREGUARD(netdev); | |
735 | ||
736 | assert(w); | |
737 | ||
738 | w->flags = WGDEVICE_F_REPLACE_PEERS; | |
739 | } | |
740 | ||
741 | static void wireguard_done(NetDev *netdev) { | |
742 | Wireguard *w; | |
743 | WireguardPeer *peer; | |
744 | WireguardIPmask *mask; | |
c195364d | 745 | WireguardEndpoint *e; |
e5719363 JT |
746 | |
747 | assert(netdev); | |
748 | w = WIREGUARD(netdev); | |
c195364d | 749 | assert(w); |
e5719363 JT |
750 | |
751 | while ((peer = w->peers)) { | |
752 | LIST_REMOVE(peers, w->peers, peer); | |
753 | while ((mask = peer->ipmasks)) { | |
754 | LIST_REMOVE(ipmasks, peer->ipmasks, mask); | |
755 | free(mask); | |
756 | } | |
757 | free(peer); | |
758 | } | |
c195364d YW |
759 | |
760 | while ((e = w->unresolved_endpoints)) { | |
761 | LIST_REMOVE(endpoints, w->unresolved_endpoints, e); | |
762 | wireguard_endpoint_free(e); | |
763 | } | |
764 | ||
765 | while ((e = w->failed_endpoints)) { | |
766 | LIST_REMOVE(endpoints, w->failed_endpoints, e); | |
767 | wireguard_endpoint_free(e); | |
768 | } | |
e5719363 JT |
769 | } |
770 | ||
771 | const NetDevVTable wireguard_vtable = { | |
772 | .object_size = sizeof(Wireguard), | |
773 | .sections = "Match\0NetDev\0WireGuard\0WireGuardPeer\0", | |
774 | .post_create = netdev_wireguard_post_create, | |
775 | .init = wireguard_init, | |
776 | .done = wireguard_done, | |
777 | .create_type = NETDEV_CREATE_INDEPENDENT, | |
778 | }; |