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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Tom Gundersen <teg@jklm.no> | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <ctype.h> | |
23 | #include <net/if.h> | |
24 | ||
25 | #include "networkd.h" | |
26 | #include "networkd-netdev.h" | |
27 | #include "networkd-link.h" | |
28 | #include "network-internal.h" | |
29 | #include "path-util.h" | |
30 | #include "conf-files.h" | |
31 | #include "conf-parser.h" | |
32 | #include "util.h" | |
33 | ||
34 | static int network_load_one(Manager *manager, const char *filename) { | |
35 | _cleanup_network_free_ Network *network = NULL; | |
36 | _cleanup_fclose_ FILE *file = NULL; | |
37 | Route *route; | |
38 | Address *address; | |
39 | int r; | |
40 | ||
41 | assert(manager); | |
42 | assert(filename); | |
43 | ||
44 | file = fopen(filename, "re"); | |
45 | if (!file) { | |
46 | if (errno == ENOENT) | |
47 | return 0; | |
48 | else | |
49 | return -errno; | |
50 | } | |
51 | ||
52 | if (null_or_empty_fd(fileno(file))) { | |
53 | log_debug("Skipping empty file: %s", filename); | |
54 | return 0; | |
55 | } | |
56 | ||
57 | network = new0(Network, 1); | |
58 | if (!network) | |
59 | return log_oom(); | |
60 | ||
61 | network->manager = manager; | |
62 | ||
63 | LIST_HEAD_INIT(network->static_addresses); | |
64 | LIST_HEAD_INIT(network->static_routes); | |
65 | ||
66 | network->stacked_netdevs = hashmap_new(&string_hash_ops); | |
67 | if (!network->stacked_netdevs) | |
68 | return log_oom(); | |
69 | ||
70 | network->addresses_by_section = hashmap_new(NULL); | |
71 | if (!network->addresses_by_section) | |
72 | return log_oom(); | |
73 | ||
74 | network->routes_by_section = hashmap_new(NULL); | |
75 | if (!network->routes_by_section) | |
76 | return log_oom(); | |
77 | ||
78 | network->filename = strdup(filename); | |
79 | if (!network->filename) | |
80 | return log_oom(); | |
81 | ||
82 | network->dhcp = DHCP_SUPPORT_NONE; | |
83 | network->dhcp_ntp = true; | |
84 | network->dhcp_dns = true; | |
85 | network->dhcp_hostname = true; | |
86 | network->dhcp_routes = true; | |
87 | network->dhcp_sendhost = true; | |
88 | network->dhcp_route_metric = DHCP_ROUTE_METRIC; | |
89 | ||
90 | network->llmnr = LLMNR_SUPPORT_YES; | |
91 | ||
92 | r = config_parse(NULL, filename, file, | |
93 | "Match\0Network\0Address\0Route\0DHCP\0DHCPv4\0", | |
94 | config_item_perf_lookup, network_network_gperf_lookup, | |
95 | false, false, true, network); | |
96 | if (r < 0) | |
97 | return r; | |
98 | ||
99 | LIST_PREPEND(networks, manager->networks, network); | |
100 | ||
101 | LIST_FOREACH(routes, route, network->static_routes) { | |
102 | if (!route->family) { | |
103 | log_warning("Route section without Gateway field configured in %s. " | |
104 | "Ignoring", filename); | |
105 | return 0; | |
106 | } | |
107 | } | |
108 | ||
109 | LIST_FOREACH(addresses, address, network->static_addresses) { | |
110 | if (!address->family) { | |
111 | log_warning("Address section without Address field configured in %s. " | |
112 | "Ignoring", filename); | |
113 | return 0; | |
114 | } | |
115 | } | |
116 | ||
117 | network = NULL; | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | int network_load(Manager *manager) { | |
123 | Network *network; | |
124 | _cleanup_strv_free_ char **files = NULL; | |
125 | char **f; | |
126 | int r; | |
127 | ||
128 | assert(manager); | |
129 | ||
130 | while ((network = manager->networks)) | |
131 | network_free(network); | |
132 | ||
133 | r = conf_files_list_strv(&files, ".network", NULL, network_dirs); | |
134 | if (r < 0) | |
135 | return log_error_errno(r, "Failed to enumerate network files: %m"); | |
136 | ||
137 | STRV_FOREACH_BACKWARDS(f, files) { | |
138 | r = network_load_one(manager, *f); | |
139 | if (r < 0) | |
140 | return r; | |
141 | } | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | void network_free(Network *network) { | |
147 | NetDev *netdev; | |
148 | Route *route; | |
149 | Address *address; | |
150 | Iterator i; | |
151 | ||
152 | if (!network) | |
153 | return; | |
154 | ||
155 | free(network->filename); | |
156 | ||
157 | free(network->match_mac); | |
158 | free(network->match_path); | |
159 | free(network->match_driver); | |
160 | free(network->match_type); | |
161 | free(network->match_name); | |
162 | ||
163 | free(network->description); | |
164 | free(network->dhcp_vendor_class_identifier); | |
165 | ||
166 | strv_free(network->ntp); | |
167 | strv_free(network->dns); | |
168 | strv_free(network->domains); | |
169 | ||
170 | netdev_unref(network->bridge); | |
171 | ||
172 | netdev_unref(network->bond); | |
173 | ||
174 | HASHMAP_FOREACH(netdev, network->stacked_netdevs, i) { | |
175 | hashmap_remove(network->stacked_netdevs, netdev->ifname); | |
176 | netdev_unref(netdev); | |
177 | } | |
178 | hashmap_free(network->stacked_netdevs); | |
179 | ||
180 | while ((route = network->static_routes)) | |
181 | route_free(route); | |
182 | ||
183 | while ((address = network->static_addresses)) | |
184 | address_free(address); | |
185 | ||
186 | hashmap_free(network->addresses_by_section); | |
187 | hashmap_free(network->routes_by_section); | |
188 | ||
189 | if (network->manager && network->manager->networks) | |
190 | LIST_REMOVE(networks, network->manager->networks, network); | |
191 | ||
192 | condition_free_list(network->match_host); | |
193 | condition_free_list(network->match_virt); | |
194 | condition_free_list(network->match_kernel); | |
195 | condition_free_list(network->match_arch); | |
196 | ||
197 | free(network); | |
198 | } | |
199 | ||
200 | int network_get(Manager *manager, struct udev_device *device, | |
201 | const char *ifname, const struct ether_addr *address, | |
202 | Network **ret) { | |
203 | Network *network; | |
204 | ||
205 | assert(manager); | |
206 | assert(ret); | |
207 | ||
208 | LIST_FOREACH(networks, network, manager->networks) { | |
209 | if (net_match_config(network->match_mac, network->match_path, | |
210 | network->match_driver, network->match_type, | |
211 | network->match_name, network->match_host, | |
212 | network->match_virt, network->match_kernel, | |
213 | network->match_arch, | |
214 | address, | |
215 | udev_device_get_property_value(device, "ID_PATH"), | |
216 | udev_device_get_driver(udev_device_get_parent(device)), | |
217 | udev_device_get_property_value(device, "ID_NET_DRIVER"), | |
218 | udev_device_get_devtype(device), | |
219 | ifname)) { | |
220 | log_debug("%-*s: found matching network '%s'", IFNAMSIZ, ifname, | |
221 | network->filename); | |
222 | *ret = network; | |
223 | return 0; | |
224 | } | |
225 | } | |
226 | ||
227 | *ret = NULL; | |
228 | ||
229 | return -ENOENT; | |
230 | } | |
231 | ||
232 | int network_apply(Manager *manager, Network *network, Link *link) { | |
233 | int r; | |
234 | ||
235 | link->network = network; | |
236 | ||
237 | if (network->ipv4ll_route) { | |
238 | Route *route; | |
239 | ||
240 | r = route_new_static(network, 0, &route); | |
241 | if (r < 0) | |
242 | return r; | |
243 | ||
244 | r = inet_pton(AF_INET, "169.254.0.0", &route->dst_addr.in); | |
245 | if (r == 0) | |
246 | return -EINVAL; | |
247 | if (r < 0) | |
248 | return -errno; | |
249 | ||
250 | route->family = AF_INET; | |
251 | route->dst_prefixlen = 16; | |
252 | route->scope = RT_SCOPE_LINK; | |
253 | route->metrics = IPV4LL_ROUTE_METRIC; | |
254 | route->protocol = RTPROT_STATIC; | |
255 | } | |
256 | ||
257 | if (network->dns || network->ntp) { | |
258 | r = link_save(link); | |
259 | if (r < 0) | |
260 | return r; | |
261 | } | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | int config_parse_netdev(const char *unit, | |
267 | const char *filename, | |
268 | unsigned line, | |
269 | const char *section, | |
270 | unsigned section_line, | |
271 | const char *lvalue, | |
272 | int ltype, | |
273 | const char *rvalue, | |
274 | void *data, | |
275 | void *userdata) { | |
276 | Network *network = userdata; | |
277 | _cleanup_free_ char *kind_string = NULL; | |
278 | char *p; | |
279 | NetDev *netdev; | |
280 | NetDevKind kind; | |
281 | int r; | |
282 | ||
283 | assert(filename); | |
284 | assert(lvalue); | |
285 | assert(rvalue); | |
286 | assert(data); | |
287 | ||
288 | kind_string = strdup(lvalue); | |
289 | if (!kind_string) | |
290 | return log_oom(); | |
291 | ||
292 | /* the keys are CamelCase versions of the kind */ | |
293 | for (p = kind_string; *p; p++) | |
294 | *p = tolower(*p); | |
295 | ||
296 | kind = netdev_kind_from_string(kind_string); | |
297 | if (kind == _NETDEV_KIND_INVALID) { | |
298 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
299 | "Invalid NetDev kind: %s", lvalue); | |
300 | return 0; | |
301 | } | |
302 | ||
303 | r = netdev_get(network->manager, rvalue, &netdev); | |
304 | if (r < 0) { | |
305 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
306 | "%s could not be found, ignoring assignment: %s", lvalue, rvalue); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | if (netdev->kind != kind) { | |
311 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
312 | "NetDev is not a %s, ignoring assignment: %s", lvalue, rvalue); | |
313 | return 0; | |
314 | } | |
315 | ||
316 | switch (kind) { | |
317 | case NETDEV_KIND_BRIDGE: | |
318 | network->bridge = netdev; | |
319 | ||
320 | break; | |
321 | case NETDEV_KIND_BOND: | |
322 | network->bond = netdev; | |
323 | ||
324 | break; | |
325 | case NETDEV_KIND_VLAN: | |
326 | case NETDEV_KIND_MACVLAN: | |
327 | case NETDEV_KIND_VXLAN: | |
328 | r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev); | |
329 | if (r < 0) { | |
330 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
331 | "Can not add VLAN '%s' to network: %s", | |
332 | rvalue, strerror(-r)); | |
333 | return 0; | |
334 | } | |
335 | ||
336 | break; | |
337 | default: | |
338 | assert_not_reached("Can not parse NetDev"); | |
339 | } | |
340 | ||
341 | netdev_ref(netdev); | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
346 | int config_parse_domains(const char *unit, | |
347 | const char *filename, | |
348 | unsigned line, | |
349 | const char *section, | |
350 | unsigned section_line, | |
351 | const char *lvalue, | |
352 | int ltype, | |
353 | const char *rvalue, | |
354 | void *data, | |
355 | void *userdata) { | |
356 | Network *network = userdata; | |
357 | char ***domains = data; | |
358 | char **domain; | |
359 | int r; | |
360 | ||
361 | r = config_parse_strv(unit, filename, line, section, section_line, | |
362 | lvalue, ltype, rvalue, domains, userdata); | |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
366 | strv_uniq(*domains); | |
367 | network->wildcard_domain = !!strv_find(*domains, "*"); | |
368 | ||
369 | STRV_FOREACH(domain, *domains) { | |
370 | if (is_localhost(*domain)) | |
371 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, "'localhost' domain names may not be configured, ignoring assignment: %s", *domain); | |
372 | else if (!hostname_is_valid(*domain)) { | |
373 | if (!streq(*domain, "*")) | |
374 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, "domain name is not valid, ignoring assignment: %s", *domain); | |
375 | } else | |
376 | continue; | |
377 | ||
378 | strv_remove(*domains, *domain); | |
379 | ||
380 | /* We removed one entry, make sure we don't skip the next one */ | |
381 | domain--; | |
382 | } | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | int config_parse_tunnel(const char *unit, | |
388 | const char *filename, | |
389 | unsigned line, | |
390 | const char *section, | |
391 | unsigned section_line, | |
392 | const char *lvalue, | |
393 | int ltype, | |
394 | const char *rvalue, | |
395 | void *data, | |
396 | void *userdata) { | |
397 | Network *network = userdata; | |
398 | NetDev *netdev; | |
399 | int r; | |
400 | ||
401 | assert(filename); | |
402 | assert(lvalue); | |
403 | assert(rvalue); | |
404 | assert(data); | |
405 | ||
406 | r = netdev_get(network->manager, rvalue, &netdev); | |
407 | if (r < 0) { | |
408 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
409 | "Tunnel is invalid, ignoring assignment: %s", rvalue); | |
410 | return 0; | |
411 | } | |
412 | ||
413 | if (netdev->kind != NETDEV_KIND_IPIP && | |
414 | netdev->kind != NETDEV_KIND_SIT && | |
415 | netdev->kind != NETDEV_KIND_GRE && | |
416 | netdev->kind != NETDEV_KIND_VTI) { | |
417 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
418 | "NetDev is not a tunnel, ignoring assignment: %s", rvalue); | |
419 | return 0; | |
420 | } | |
421 | ||
422 | r = hashmap_put(network->stacked_netdevs, netdev->ifname, netdev); | |
423 | if (r < 0) { | |
424 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
425 | "Can not add VLAN '%s' to network: %s", | |
426 | rvalue, strerror(-r)); | |
427 | return 0; | |
428 | } | |
429 | ||
430 | netdev_ref(netdev); | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
435 | static const char* const dhcp_support_table[_DHCP_SUPPORT_MAX] = { | |
436 | [DHCP_SUPPORT_NONE] = "none", | |
437 | [DHCP_SUPPORT_BOTH] = "both", | |
438 | [DHCP_SUPPORT_V4] = "v4", | |
439 | [DHCP_SUPPORT_V6] = "v6", | |
440 | }; | |
441 | ||
442 | DEFINE_STRING_TABLE_LOOKUP(dhcp_support, DHCPSupport); | |
443 | ||
444 | int config_parse_dhcp( | |
445 | const char* unit, | |
446 | const char *filename, | |
447 | unsigned line, | |
448 | const char *section, | |
449 | unsigned section_line, | |
450 | const char *lvalue, | |
451 | int ltype, | |
452 | const char *rvalue, | |
453 | void *data, | |
454 | void *userdata) { | |
455 | ||
456 | DHCPSupport *dhcp = data; | |
457 | int k; | |
458 | ||
459 | assert(filename); | |
460 | assert(lvalue); | |
461 | assert(rvalue); | |
462 | assert(data); | |
463 | ||
464 | /* Our enum shall be a superset of booleans, hence first try | |
465 | * to parse as boolean, and then as enum */ | |
466 | ||
467 | k = parse_boolean(rvalue); | |
468 | if (k > 0) | |
469 | *dhcp = DHCP_SUPPORT_BOTH; | |
470 | else if (k == 0) | |
471 | *dhcp = DHCP_SUPPORT_NONE; | |
472 | else { | |
473 | DHCPSupport s; | |
474 | ||
475 | s = dhcp_support_from_string(rvalue); | |
476 | if (s < 0){ | |
477 | log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse DHCP option, ignoring: %s", rvalue); | |
478 | return 0; | |
479 | } | |
480 | ||
481 | *dhcp = s; | |
482 | } | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static const char* const llmnr_support_table[_LLMNR_SUPPORT_MAX] = { | |
488 | [LLMNR_SUPPORT_NO] = "no", | |
489 | [LLMNR_SUPPORT_YES] = "yes", | |
490 | [LLMNR_SUPPORT_RESOLVE] = "resolve", | |
491 | }; | |
492 | ||
493 | DEFINE_STRING_TABLE_LOOKUP(llmnr_support, LLMNRSupport); | |
494 | ||
495 | int config_parse_llmnr( | |
496 | const char* unit, | |
497 | const char *filename, | |
498 | unsigned line, | |
499 | const char *section, | |
500 | unsigned section_line, | |
501 | const char *lvalue, | |
502 | int ltype, | |
503 | const char *rvalue, | |
504 | void *data, | |
505 | void *userdata) { | |
506 | ||
507 | LLMNRSupport *llmnr = data; | |
508 | int k; | |
509 | ||
510 | assert(filename); | |
511 | assert(lvalue); | |
512 | assert(rvalue); | |
513 | assert(data); | |
514 | ||
515 | /* Our enum shall be a superset of booleans, hence first try | |
516 | * to parse as boolean, and then as enum */ | |
517 | ||
518 | k = parse_boolean(rvalue); | |
519 | if (k > 0) | |
520 | *llmnr = LLMNR_SUPPORT_YES; | |
521 | else if (k == 0) | |
522 | *llmnr = LLMNR_SUPPORT_NO; | |
523 | else { | |
524 | LLMNRSupport s; | |
525 | ||
526 | s = llmnr_support_from_string(rvalue); | |
527 | if (s < 0){ | |
528 | log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse LLMNR option, ignoring: %s", rvalue); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | *llmnr = s; | |
533 | } | |
534 | ||
535 | return 0; | |
536 | } |