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5fde13d7 TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright (C) 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 <netinet/ether.h> | |
d2df0d0e | 23 | #include <linux/if.h> |
f5284182 | 24 | #include <arpa/inet.h> |
5fde13d7 | 25 | |
b5db00e5 UTL |
26 | #include "strv.h" |
27 | #include "siphash24.h" | |
e1ea665e | 28 | #include "dhcp-lease-internal.h" |
be32eb9b | 29 | #include "log.h" |
5fde13d7 | 30 | #include "utf8.h" |
a12fa420 | 31 | #include "util.h" |
5fde13d7 | 32 | #include "conf-parser.h" |
134e56dc | 33 | #include "condition.h" |
44e7b949 | 34 | #include "network-internal.h" |
5fde13d7 | 35 | |
fc541430 | 36 | const char *net_get_name(struct udev_device *device) { |
44e7b949 | 37 | const char *name, *field; |
fc541430 TG |
38 | |
39 | assert(device); | |
b5db00e5 UTL |
40 | |
41 | /* fetch some persistent data unique (on this machine) to this device */ | |
44e7b949 | 42 | FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC") { |
b5db00e5 UTL |
43 | name = udev_device_get_property_value(device, field); |
44 | if (name) | |
44e7b949 | 45 | return name; |
b5db00e5 UTL |
46 | } |
47 | ||
44e7b949 | 48 | return NULL; |
fc541430 TG |
49 | } |
50 | ||
51 | #define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a) | |
52 | ||
53 | int net_get_unique_predictable_data(struct udev_device *device, uint8_t result[8]) { | |
54 | size_t l, sz = 0; | |
55 | const char *name = NULL; | |
56 | int r; | |
57 | uint8_t *v; | |
58 | ||
59 | assert(device); | |
60 | ||
61 | name = net_get_name(device); | |
b5db00e5 UTL |
62 | if (!name) |
63 | return -ENOENT; | |
64 | ||
65 | l = strlen(name); | |
66 | sz = sizeof(sd_id128_t) + l; | |
67 | v = alloca(sz); | |
68 | ||
69 | /* fetch some persistent data unique to this machine */ | |
70 | r = sd_id128_get_machine((sd_id128_t*) v); | |
71 | if (r < 0) | |
72 | return r; | |
73 | memcpy(v + sizeof(sd_id128_t), name, l); | |
74 | ||
75 | /* Let's hash the machine ID plus the device name. We | |
76 | * use a fixed, but originally randomly created hash | |
77 | * key here. */ | |
78 | siphash24(result, v, sz, HASH_KEY.bytes); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
be32eb9b | 83 | bool net_match_config(const struct ether_addr *match_mac, |
5256e00e TG |
84 | char * const *match_paths, |
85 | char * const *match_drivers, | |
86 | char * const *match_types, | |
87 | char * const *match_names, | |
2cc412b5 TG |
88 | Condition *match_host, |
89 | Condition *match_virt, | |
90 | Condition *match_kernel, | |
edbb03e9 | 91 | Condition *match_arch, |
505f8da7 | 92 | const struct ether_addr *dev_mac, |
b3e01314 | 93 | const char *dev_path, |
bf175aaf | 94 | const char *dev_parent_driver, |
b3e01314 TG |
95 | const char *dev_driver, |
96 | const char *dev_type, | |
32bc8adc | 97 | const char *dev_name) { |
be32eb9b | 98 | |
a4705396 | 99 | if (match_host && !condition_test(match_host)) |
7eb08da4 | 100 | return false; |
2cc412b5 | 101 | |
a4705396 | 102 | if (match_virt && !condition_test(match_virt)) |
7eb08da4 | 103 | return false; |
2cc412b5 | 104 | |
a4705396 | 105 | if (match_kernel && !condition_test(match_kernel)) |
7eb08da4 | 106 | return false; |
2cc412b5 | 107 | |
a4705396 | 108 | if (match_arch && !condition_test(match_arch)) |
7eb08da4 | 109 | return false; |
edbb03e9 | 110 | |
505f8da7 | 111 | if (match_mac && (!dev_mac || memcmp(match_mac, dev_mac, ETH_ALEN))) |
7eb08da4 | 112 | return false; |
be32eb9b | 113 | |
d49dc812 | 114 | if (!strv_isempty(match_paths) && |
2404701e | 115 | (!dev_path || !strv_fnmatch(match_paths, dev_path, 0))) |
ee5de57b | 116 | return false; |
5256e00e | 117 | |
d49dc812 | 118 | if (!strv_isempty(match_drivers) && |
2404701e | 119 | (!dev_driver || !strv_fnmatch(match_drivers, dev_driver, 0))) |
ee5de57b | 120 | return false; |
5256e00e | 121 | |
d49dc812 | 122 | if (!strv_isempty(match_types) && |
2404701e | 123 | (!dev_type || !strv_fnmatch_or_empty(match_types, dev_type, 0))) |
ee5de57b | 124 | return false; |
5256e00e | 125 | |
d49dc812 | 126 | if (!strv_isempty(match_names) && |
2404701e | 127 | (!dev_name || !strv_fnmatch_or_empty(match_names, dev_name, 0))) |
ee5de57b | 128 | return false; |
5256e00e | 129 | |
7eb08da4 | 130 | return true; |
be32eb9b | 131 | } |
5fde13d7 | 132 | |
2cc412b5 TG |
133 | int config_parse_net_condition(const char *unit, |
134 | const char *filename, | |
135 | unsigned line, | |
136 | const char *section, | |
137 | unsigned section_line, | |
138 | const char *lvalue, | |
139 | int ltype, | |
140 | const char *rvalue, | |
141 | void *data, | |
142 | void *userdata) { | |
143 | ||
144 | ConditionType cond = ltype; | |
145 | Condition **ret = data; | |
146 | bool negate; | |
147 | Condition *c; | |
148 | _cleanup_free_ char *s = NULL; | |
149 | ||
150 | assert(filename); | |
151 | assert(lvalue); | |
152 | assert(rvalue); | |
153 | assert(data); | |
154 | ||
155 | negate = rvalue[0] == '!'; | |
156 | if (negate) | |
157 | rvalue++; | |
158 | ||
159 | s = strdup(rvalue); | |
160 | if (!s) | |
161 | return log_oom(); | |
162 | ||
163 | c = condition_new(cond, s, false, negate); | |
164 | if (!c) | |
165 | return log_oom(); | |
166 | ||
167 | if (*ret) | |
168 | condition_free(*ret); | |
169 | ||
170 | *ret = c; | |
171 | return 0; | |
172 | } | |
173 | ||
5fde13d7 TG |
174 | int config_parse_ifname(const char *unit, |
175 | const char *filename, | |
176 | unsigned line, | |
177 | const char *section, | |
71a61510 | 178 | unsigned section_line, |
5fde13d7 TG |
179 | const char *lvalue, |
180 | int ltype, | |
181 | const char *rvalue, | |
182 | void *data, | |
183 | void *userdata) { | |
184 | ||
185 | char **s = data; | |
5a3f1989 | 186 | _cleanup_free_ char *n = NULL; |
5fde13d7 TG |
187 | |
188 | assert(filename); | |
189 | assert(lvalue); | |
190 | assert(rvalue); | |
191 | assert(data); | |
192 | ||
193 | n = strdup(rvalue); | |
194 | if (!n) | |
195 | return log_oom(); | |
196 | ||
197 | if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) { | |
198 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
199 | "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue); | |
5fde13d7 TG |
200 | return 0; |
201 | } | |
202 | ||
203 | free(*s); | |
5a3f1989 | 204 | if (*n) { |
5fde13d7 | 205 | *s = n; |
5a3f1989 TG |
206 | n = NULL; |
207 | } else | |
5fde13d7 | 208 | *s = NULL; |
5fde13d7 TG |
209 | |
210 | return 0; | |
211 | } | |
212 | ||
5256e00e TG |
213 | int config_parse_ifnames(const char *unit, |
214 | const char *filename, | |
215 | unsigned line, | |
216 | const char *section, | |
217 | unsigned section_line, | |
218 | const char *lvalue, | |
219 | int ltype, | |
220 | const char *rvalue, | |
221 | void *data, | |
222 | void *userdata) { | |
223 | ||
224 | char ***sv = data; | |
225 | const char *word, *state; | |
226 | size_t l; | |
227 | int r; | |
228 | ||
229 | assert(filename); | |
230 | assert(lvalue); | |
231 | assert(rvalue); | |
232 | assert(data); | |
233 | ||
234 | FOREACH_WORD(word, l, rvalue, state) { | |
235 | char *n; | |
236 | ||
237 | n = strndup(word, l); | |
238 | if (!n) | |
239 | return log_oom(); | |
240 | ||
241 | if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) { | |
242 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
243 | "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue); | |
244 | free(n); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | r = strv_consume(sv, n); | |
249 | if (r < 0) | |
250 | return log_oom(); | |
251 | } | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
d2df0d0e TG |
256 | int config_parse_ifalias(const char *unit, |
257 | const char *filename, | |
258 | unsigned line, | |
259 | const char *section, | |
71a61510 | 260 | unsigned section_line, |
d2df0d0e TG |
261 | const char *lvalue, |
262 | int ltype, | |
263 | const char *rvalue, | |
264 | void *data, | |
265 | void *userdata) { | |
266 | ||
267 | char **s = data; | |
9c39eb5c | 268 | _cleanup_free_ char *n = NULL; |
d2df0d0e TG |
269 | |
270 | assert(filename); | |
271 | assert(lvalue); | |
272 | assert(rvalue); | |
273 | assert(data); | |
274 | ||
275 | n = strdup(rvalue); | |
276 | if (!n) | |
277 | return log_oom(); | |
278 | ||
279 | if (!ascii_is_valid(n) || strlen(n) >= IFALIASZ) { | |
280 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
281 | "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue); | |
d2df0d0e TG |
282 | return 0; |
283 | } | |
284 | ||
285 | free(*s); | |
9c39eb5c | 286 | if (*n) { |
d2df0d0e | 287 | *s = n; |
9c39eb5c TG |
288 | n = NULL; |
289 | } else | |
d2df0d0e | 290 | *s = NULL; |
d2df0d0e TG |
291 | |
292 | return 0; | |
293 | } | |
294 | ||
5fde13d7 TG |
295 | int config_parse_hwaddr(const char *unit, |
296 | const char *filename, | |
297 | unsigned line, | |
298 | const char *section, | |
71a61510 | 299 | unsigned section_line, |
5fde13d7 TG |
300 | const char *lvalue, |
301 | int ltype, | |
302 | const char *rvalue, | |
303 | void *data, | |
304 | void *userdata) { | |
305 | struct ether_addr **hwaddr = data; | |
306 | struct ether_addr *n; | |
307 | int r; | |
308 | ||
309 | assert(filename); | |
310 | assert(lvalue); | |
311 | assert(rvalue); | |
312 | assert(data); | |
313 | ||
a12fa420 | 314 | n = new0(struct ether_addr, 1); |
5fde13d7 TG |
315 | if (!n) |
316 | return log_oom(); | |
317 | ||
318 | r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
319 | &n->ether_addr_octet[0], | |
320 | &n->ether_addr_octet[1], | |
321 | &n->ether_addr_octet[2], | |
322 | &n->ether_addr_octet[3], | |
323 | &n->ether_addr_octet[4], | |
324 | &n->ether_addr_octet[5]); | |
325 | if (r != 6) { | |
326 | log_syntax(unit, LOG_ERR, filename, line, EINVAL, | |
327 | "Not a valid MAC address, ignoring assignment: %s", rvalue); | |
328 | free(n); | |
329 | return 0; | |
330 | } | |
331 | ||
332 | free(*hwaddr); | |
333 | *hwaddr = n; | |
334 | ||
335 | return 0; | |
336 | } | |
f5284182 | 337 | |
b0e39c82 | 338 | void serialize_in_addrs(FILE *f, const struct in_addr *addresses, size_t size) { |
09bee74d TG |
339 | unsigned i; |
340 | ||
341 | assert(f); | |
09bee74d TG |
342 | assert(addresses); |
343 | assert(size); | |
344 | ||
09bee74d TG |
345 | for (i = 0; i < size; i++) |
346 | fprintf(f, "%s%s", inet_ntoa(addresses[i]), | |
347 | (i < (size - 1)) ? " ": ""); | |
09bee74d TG |
348 | } |
349 | ||
a2ba62c7 | 350 | int deserialize_in_addrs(struct in_addr **ret, const char *string) { |
09bee74d | 351 | _cleanup_free_ struct in_addr *addresses = NULL; |
a2ba62c7 | 352 | int size = 0; |
a2a5291b | 353 | const char *word, *state; |
09bee74d TG |
354 | size_t len; |
355 | ||
356 | assert(ret); | |
09bee74d TG |
357 | assert(string); |
358 | ||
359 | FOREACH_WORD(word, len, string, state) { | |
360 | _cleanup_free_ char *addr_str = NULL; | |
361 | struct in_addr *new_addresses; | |
362 | int r; | |
363 | ||
364 | new_addresses = realloc(addresses, (size + 1) * sizeof(struct in_addr)); | |
365 | if (!new_addresses) | |
366 | return -ENOMEM; | |
367 | else | |
368 | addresses = new_addresses; | |
369 | ||
370 | addr_str = strndup(word, len); | |
371 | if (!addr_str) | |
372 | return -ENOMEM; | |
373 | ||
374 | r = inet_pton(AF_INET, addr_str, &(addresses[size])); | |
375 | if (r <= 0) | |
376 | continue; | |
377 | ||
378 | size ++; | |
379 | } | |
380 | ||
09bee74d TG |
381 | *ret = addresses; |
382 | addresses = NULL; | |
383 | ||
a2ba62c7 | 384 | return size; |
09bee74d TG |
385 | } |
386 | ||
a2ba62c7 | 387 | int deserialize_in6_addrs(struct in6_addr **ret, const char *string) { |
09bee74d | 388 | _cleanup_free_ struct in6_addr *addresses = NULL; |
a2ba62c7 | 389 | int size = 0; |
a2a5291b | 390 | const char *word, *state; |
09bee74d TG |
391 | size_t len; |
392 | ||
393 | assert(ret); | |
09bee74d TG |
394 | assert(string); |
395 | ||
396 | FOREACH_WORD(word, len, string, state) { | |
397 | _cleanup_free_ char *addr_str = NULL; | |
398 | struct in6_addr *new_addresses; | |
399 | int r; | |
400 | ||
401 | new_addresses = realloc(addresses, (size + 1) * sizeof(struct in6_addr)); | |
402 | if (!new_addresses) | |
403 | return -ENOMEM; | |
404 | else | |
405 | addresses = new_addresses; | |
406 | ||
407 | addr_str = strndup(word, len); | |
408 | if (!addr_str) | |
409 | return -ENOMEM; | |
410 | ||
411 | r = inet_pton(AF_INET6, addr_str, &(addresses[size])); | |
412 | if (r <= 0) | |
413 | continue; | |
414 | ||
415 | size++; | |
416 | } | |
417 | ||
09bee74d TG |
418 | *ret = addresses; |
419 | addresses = NULL; | |
420 | ||
a2ba62c7 | 421 | return size; |
09bee74d | 422 | } |
e1ea665e EY |
423 | |
424 | void serialize_dhcp_routes(FILE *f, const char *key, struct sd_dhcp_route *routes, size_t size) { | |
425 | unsigned i; | |
426 | ||
427 | assert(f); | |
428 | assert(key); | |
429 | assert(routes); | |
430 | assert(size); | |
431 | ||
432 | fprintf(f, "%s=", key); | |
433 | ||
fbf7dcb5 DW |
434 | for (i = 0; i < size; i++) { |
435 | fprintf(f, "%s/%" PRIu8, inet_ntoa(routes[i].dst_addr), | |
436 | routes[i].dst_prefixlen); | |
437 | fprintf(f, ",%s%s", inet_ntoa(routes[i].gw_addr), | |
e1ea665e | 438 | (i < (size - 1)) ? " ": ""); |
fbf7dcb5 | 439 | } |
e1ea665e EY |
440 | |
441 | fputs("\n", f); | |
442 | } | |
443 | ||
444 | int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, size_t *ret_allocated, const char *string) { | |
445 | _cleanup_free_ struct sd_dhcp_route *routes = NULL; | |
446 | size_t size = 0, allocated = 0; | |
a2a5291b | 447 | const char *word, *state; |
e1ea665e EY |
448 | size_t len; |
449 | ||
450 | assert(ret); | |
451 | assert(ret_size); | |
452 | assert(ret_allocated); | |
453 | assert(string); | |
454 | ||
455 | FOREACH_WORD(word, len, string, state) { | |
456 | /* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */ | |
69f08c83 | 457 | _cleanup_free_ char* entry = NULL; |
e1ea665e EY |
458 | char *tok, *tok_end; |
459 | unsigned n; | |
460 | int r; | |
461 | ||
462 | if (!GREEDY_REALLOC(routes, allocated, size + 1)) | |
463 | return -ENOMEM; | |
464 | ||
465 | entry = strndup(word, len); | |
31db0120 SS |
466 | if(!entry) |
467 | return -ENOMEM; | |
e1ea665e EY |
468 | |
469 | tok = entry; | |
470 | ||
471 | /* get the subnet */ | |
472 | tok_end = strchr(tok, '/'); | |
473 | if (!tok_end) | |
474 | continue; | |
475 | *tok_end = '\0'; | |
476 | ||
477 | r = inet_aton(tok, &routes[size].dst_addr); | |
478 | if (r == 0) | |
479 | continue; | |
480 | ||
481 | tok = tok_end + 1; | |
482 | ||
483 | /* get the prefixlen */ | |
484 | tok_end = strchr(tok, ','); | |
485 | if (!tok_end) | |
486 | continue; | |
487 | ||
488 | *tok_end = '\0'; | |
489 | ||
490 | r = safe_atou(tok, &n); | |
491 | if (r < 0 || n > 32) | |
492 | continue; | |
493 | ||
494 | routes[size].dst_prefixlen = (uint8_t) n; | |
495 | tok = tok_end + 1; | |
496 | ||
497 | /* get the gateway */ | |
498 | r = inet_aton(tok, &routes[size].gw_addr); | |
499 | if (r == 0) | |
500 | continue; | |
501 | ||
502 | size++; | |
503 | } | |
504 | ||
505 | *ret_size = size; | |
506 | *ret_allocated = allocated; | |
507 | *ret = routes; | |
508 | routes = NULL; | |
509 | ||
510 | return 0; | |
511 | } | |
a073309f AC |
512 | |
513 | int serialize_dhcp_option(FILE *f, const char *key, const uint8_t *data, size_t size) { | |
514 | _cleanup_free_ char *hex_buf = NULL; | |
515 | ||
516 | assert(f); | |
517 | assert(key); | |
518 | assert(data); | |
519 | ||
520 | hex_buf = hexmem(data, size); | |
521 | if (hex_buf == NULL) | |
522 | return -ENOMEM; | |
523 | ||
524 | fprintf(f, "%s=%s\n", key, hex_buf); | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | int deserialize_dhcp_option(uint8_t **data, size_t *data_len, const char *string) { | |
530 | assert(data); | |
531 | assert(data_len); | |
532 | assert(string); | |
533 | ||
534 | if (strlen(string) % 2) | |
535 | return -EINVAL; | |
536 | ||
537 | return unhexmem(string, strlen(string), (void **)data, data_len); | |
538 | } |