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Commit | Line | Data |
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5fde13d7 TG |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright (C) 2013 Tom Gundersen <teg@jklm.no> | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
f5284182 | 20 | #include <arpa/inet.h> |
07630cea LP |
21 | #include <linux/if.h> |
22 | #include <netinet/ether.h> | |
5fde13d7 | 23 | |
07630cea LP |
24 | #include "sd-ndisc.h" |
25 | ||
b5efdb8a | 26 | #include "alloc-util.h" |
07630cea LP |
27 | #include "condition.h" |
28 | #include "conf-parser.h" | |
e1ea665e | 29 | #include "dhcp-lease-internal.h" |
cf0fbc49 | 30 | #include "hexdecoct.h" |
be32eb9b | 31 | #include "log.h" |
6bedfcbb LP |
32 | #include "network-internal.h" |
33 | #include "parse-util.h" | |
07630cea LP |
34 | #include "siphash24.h" |
35 | #include "string-util.h" | |
36 | #include "strv.h" | |
5fde13d7 | 37 | #include "utf8.h" |
a12fa420 | 38 | #include "util.h" |
5fde13d7 | 39 | |
fc541430 | 40 | const char *net_get_name(struct udev_device *device) { |
44e7b949 | 41 | const char *name, *field; |
fc541430 TG |
42 | |
43 | assert(device); | |
b5db00e5 UTL |
44 | |
45 | /* fetch some persistent data unique (on this machine) to this device */ | |
44e7b949 | 46 | FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC") { |
b5db00e5 UTL |
47 | name = udev_device_get_property_value(device, field); |
48 | if (name) | |
44e7b949 | 49 | return name; |
b5db00e5 UTL |
50 | } |
51 | ||
44e7b949 | 52 | return NULL; |
fc541430 TG |
53 | } |
54 | ||
55 | #define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a) | |
56 | ||
dbe81cbd | 57 | int net_get_unique_predictable_data(struct udev_device *device, uint64_t *result) { |
fc541430 TG |
58 | size_t l, sz = 0; |
59 | const char *name = NULL; | |
60 | int r; | |
61 | uint8_t *v; | |
62 | ||
63 | assert(device); | |
64 | ||
65 | name = net_get_name(device); | |
b5db00e5 UTL |
66 | if (!name) |
67 | return -ENOENT; | |
68 | ||
69 | l = strlen(name); | |
70 | sz = sizeof(sd_id128_t) + l; | |
71 | v = alloca(sz); | |
72 | ||
73 | /* fetch some persistent data unique to this machine */ | |
74 | r = sd_id128_get_machine((sd_id128_t*) v); | |
75 | if (r < 0) | |
76 | return r; | |
77 | memcpy(v + sizeof(sd_id128_t), name, l); | |
78 | ||
79 | /* Let's hash the machine ID plus the device name. We | |
80 | * use a fixed, but originally randomly created hash | |
81 | * key here. */ | |
933f9cae | 82 | *result = htole64(siphash24(v, sz, HASH_KEY.bytes)); |
b5db00e5 UTL |
83 | |
84 | return 0; | |
85 | } | |
86 | ||
be32eb9b | 87 | bool net_match_config(const struct ether_addr *match_mac, |
5256e00e TG |
88 | char * const *match_paths, |
89 | char * const *match_drivers, | |
90 | char * const *match_types, | |
91 | char * const *match_names, | |
2cc412b5 TG |
92 | Condition *match_host, |
93 | Condition *match_virt, | |
94 | Condition *match_kernel, | |
edbb03e9 | 95 | Condition *match_arch, |
505f8da7 | 96 | const struct ether_addr *dev_mac, |
b3e01314 | 97 | const char *dev_path, |
bf175aaf | 98 | const char *dev_parent_driver, |
b3e01314 TG |
99 | const char *dev_driver, |
100 | const char *dev_type, | |
32bc8adc | 101 | const char *dev_name) { |
be32eb9b | 102 | |
a4705396 | 103 | if (match_host && !condition_test(match_host)) |
7eb08da4 | 104 | return false; |
2cc412b5 | 105 | |
a4705396 | 106 | if (match_virt && !condition_test(match_virt)) |
7eb08da4 | 107 | return false; |
2cc412b5 | 108 | |
a4705396 | 109 | if (match_kernel && !condition_test(match_kernel)) |
7eb08da4 | 110 | return false; |
2cc412b5 | 111 | |
a4705396 | 112 | if (match_arch && !condition_test(match_arch)) |
7eb08da4 | 113 | return false; |
edbb03e9 | 114 | |
505f8da7 | 115 | if (match_mac && (!dev_mac || memcmp(match_mac, dev_mac, ETH_ALEN))) |
7eb08da4 | 116 | return false; |
be32eb9b | 117 | |
d49dc812 | 118 | if (!strv_isempty(match_paths) && |
2404701e | 119 | (!dev_path || !strv_fnmatch(match_paths, dev_path, 0))) |
ee5de57b | 120 | return false; |
5256e00e | 121 | |
d49dc812 | 122 | if (!strv_isempty(match_drivers) && |
2404701e | 123 | (!dev_driver || !strv_fnmatch(match_drivers, dev_driver, 0))) |
ee5de57b | 124 | return false; |
5256e00e | 125 | |
d49dc812 | 126 | if (!strv_isempty(match_types) && |
2404701e | 127 | (!dev_type || !strv_fnmatch_or_empty(match_types, dev_type, 0))) |
ee5de57b | 128 | return false; |
5256e00e | 129 | |
d49dc812 | 130 | if (!strv_isempty(match_names) && |
2404701e | 131 | (!dev_name || !strv_fnmatch_or_empty(match_names, dev_name, 0))) |
ee5de57b | 132 | return false; |
5256e00e | 133 | |
7eb08da4 | 134 | return true; |
be32eb9b | 135 | } |
5fde13d7 | 136 | |
2cc412b5 TG |
137 | int config_parse_net_condition(const char *unit, |
138 | const char *filename, | |
139 | unsigned line, | |
140 | const char *section, | |
141 | unsigned section_line, | |
142 | const char *lvalue, | |
143 | int ltype, | |
144 | const char *rvalue, | |
145 | void *data, | |
146 | void *userdata) { | |
147 | ||
148 | ConditionType cond = ltype; | |
149 | Condition **ret = data; | |
150 | bool negate; | |
151 | Condition *c; | |
152 | _cleanup_free_ char *s = NULL; | |
153 | ||
154 | assert(filename); | |
155 | assert(lvalue); | |
156 | assert(rvalue); | |
157 | assert(data); | |
158 | ||
159 | negate = rvalue[0] == '!'; | |
160 | if (negate) | |
161 | rvalue++; | |
162 | ||
163 | s = strdup(rvalue); | |
164 | if (!s) | |
165 | return log_oom(); | |
166 | ||
167 | c = condition_new(cond, s, false, negate); | |
168 | if (!c) | |
169 | return log_oom(); | |
170 | ||
171 | if (*ret) | |
172 | condition_free(*ret); | |
173 | ||
174 | *ret = c; | |
175 | return 0; | |
176 | } | |
177 | ||
5fde13d7 TG |
178 | int config_parse_ifname(const char *unit, |
179 | const char *filename, | |
180 | unsigned line, | |
181 | const char *section, | |
71a61510 | 182 | unsigned section_line, |
5fde13d7 TG |
183 | const char *lvalue, |
184 | int ltype, | |
185 | const char *rvalue, | |
186 | void *data, | |
187 | void *userdata) { | |
188 | ||
189 | char **s = data; | |
5a3f1989 | 190 | _cleanup_free_ char *n = NULL; |
5fde13d7 TG |
191 | |
192 | assert(filename); | |
193 | assert(lvalue); | |
194 | assert(rvalue); | |
195 | assert(data); | |
196 | ||
197 | n = strdup(rvalue); | |
198 | if (!n) | |
199 | return log_oom(); | |
200 | ||
201 | if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) { | |
12ca818f | 202 | log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue); |
5fde13d7 TG |
203 | return 0; |
204 | } | |
205 | ||
206 | free(*s); | |
5a3f1989 | 207 | if (*n) { |
5fde13d7 | 208 | *s = n; |
5a3f1989 TG |
209 | n = NULL; |
210 | } else | |
5fde13d7 | 211 | *s = NULL; |
5fde13d7 TG |
212 | |
213 | return 0; | |
214 | } | |
215 | ||
5256e00e TG |
216 | int config_parse_ifnames(const char *unit, |
217 | const char *filename, | |
218 | unsigned line, | |
219 | const char *section, | |
220 | unsigned section_line, | |
221 | const char *lvalue, | |
222 | int ltype, | |
223 | const char *rvalue, | |
224 | void *data, | |
225 | void *userdata) { | |
226 | ||
227 | char ***sv = data; | |
228 | const char *word, *state; | |
229 | size_t l; | |
230 | int r; | |
231 | ||
232 | assert(filename); | |
233 | assert(lvalue); | |
234 | assert(rvalue); | |
235 | assert(data); | |
236 | ||
237 | FOREACH_WORD(word, l, rvalue, state) { | |
238 | char *n; | |
239 | ||
240 | n = strndup(word, l); | |
241 | if (!n) | |
242 | return log_oom(); | |
243 | ||
244 | if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) { | |
12ca818f | 245 | log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue); |
5256e00e TG |
246 | free(n); |
247 | return 0; | |
248 | } | |
249 | ||
250 | r = strv_consume(sv, n); | |
251 | if (r < 0) | |
252 | return log_oom(); | |
253 | } | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
d2df0d0e TG |
258 | int config_parse_ifalias(const char *unit, |
259 | const char *filename, | |
260 | unsigned line, | |
261 | const char *section, | |
71a61510 | 262 | unsigned section_line, |
d2df0d0e TG |
263 | const char *lvalue, |
264 | int ltype, | |
265 | const char *rvalue, | |
266 | void *data, | |
267 | void *userdata) { | |
268 | ||
269 | char **s = data; | |
9c39eb5c | 270 | _cleanup_free_ char *n = NULL; |
d2df0d0e TG |
271 | |
272 | assert(filename); | |
273 | assert(lvalue); | |
274 | assert(rvalue); | |
275 | assert(data); | |
276 | ||
277 | n = strdup(rvalue); | |
278 | if (!n) | |
279 | return log_oom(); | |
280 | ||
281 | if (!ascii_is_valid(n) || strlen(n) >= IFALIASZ) { | |
12ca818f | 282 | log_syntax(unit, LOG_ERR, filename, line, 0, "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue); |
d2df0d0e TG |
283 | return 0; |
284 | } | |
285 | ||
286 | free(*s); | |
9c39eb5c | 287 | if (*n) { |
d2df0d0e | 288 | *s = n; |
9c39eb5c TG |
289 | n = NULL; |
290 | } else | |
d2df0d0e | 291 | *s = NULL; |
d2df0d0e TG |
292 | |
293 | return 0; | |
294 | } | |
295 | ||
5fde13d7 TG |
296 | int config_parse_hwaddr(const char *unit, |
297 | const char *filename, | |
298 | unsigned line, | |
299 | const char *section, | |
71a61510 | 300 | unsigned section_line, |
5fde13d7 TG |
301 | const char *lvalue, |
302 | int ltype, | |
303 | const char *rvalue, | |
304 | void *data, | |
305 | void *userdata) { | |
306 | struct ether_addr **hwaddr = data; | |
307 | struct ether_addr *n; | |
308 | int r; | |
309 | ||
310 | assert(filename); | |
311 | assert(lvalue); | |
312 | assert(rvalue); | |
313 | assert(data); | |
314 | ||
a12fa420 | 315 | n = new0(struct ether_addr, 1); |
5fde13d7 TG |
316 | if (!n) |
317 | return log_oom(); | |
318 | ||
319 | r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
320 | &n->ether_addr_octet[0], | |
321 | &n->ether_addr_octet[1], | |
322 | &n->ether_addr_octet[2], | |
323 | &n->ether_addr_octet[3], | |
324 | &n->ether_addr_octet[4], | |
325 | &n->ether_addr_octet[5]); | |
326 | if (r != 6) { | |
12ca818f | 327 | log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue); |
5fde13d7 TG |
328 | free(n); |
329 | return 0; | |
330 | } | |
331 | ||
332 | free(*hwaddr); | |
333 | *hwaddr = n; | |
334 | ||
335 | return 0; | |
336 | } | |
f5284182 | 337 | |
413708d1 VK |
338 | int config_parse_iaid(const char *unit, |
339 | const char *filename, | |
340 | unsigned line, | |
341 | const char *section, | |
342 | unsigned section_line, | |
343 | const char *lvalue, | |
344 | int ltype, | |
345 | const char *rvalue, | |
346 | void *data, | |
347 | void *userdata) { | |
348 | uint32_t iaid; | |
349 | int r; | |
350 | ||
351 | assert(filename); | |
352 | assert(lvalue); | |
353 | assert(rvalue); | |
354 | assert(data); | |
355 | ||
356 | r = safe_atou32(rvalue, &iaid); | |
357 | if (r < 0) { | |
358 | log_syntax(unit, LOG_ERR, filename, line, 0, "Unable to read IAID: %s", rvalue); | |
359 | return r; | |
360 | } | |
361 | ||
362 | *((uint32_t *)data) = iaid; | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
b0e39c82 | 367 | void serialize_in_addrs(FILE *f, const struct in_addr *addresses, size_t size) { |
09bee74d TG |
368 | unsigned i; |
369 | ||
370 | assert(f); | |
09bee74d TG |
371 | assert(addresses); |
372 | assert(size); | |
373 | ||
09bee74d TG |
374 | for (i = 0; i < size; i++) |
375 | fprintf(f, "%s%s", inet_ntoa(addresses[i]), | |
376 | (i < (size - 1)) ? " ": ""); | |
09bee74d TG |
377 | } |
378 | ||
a2ba62c7 | 379 | int deserialize_in_addrs(struct in_addr **ret, const char *string) { |
09bee74d | 380 | _cleanup_free_ struct in_addr *addresses = NULL; |
a2ba62c7 | 381 | int size = 0; |
a2a5291b | 382 | const char *word, *state; |
09bee74d TG |
383 | size_t len; |
384 | ||
385 | assert(ret); | |
09bee74d TG |
386 | assert(string); |
387 | ||
388 | FOREACH_WORD(word, len, string, state) { | |
389 | _cleanup_free_ char *addr_str = NULL; | |
390 | struct in_addr *new_addresses; | |
391 | int r; | |
392 | ||
393 | new_addresses = realloc(addresses, (size + 1) * sizeof(struct in_addr)); | |
394 | if (!new_addresses) | |
395 | return -ENOMEM; | |
396 | else | |
397 | addresses = new_addresses; | |
398 | ||
399 | addr_str = strndup(word, len); | |
400 | if (!addr_str) | |
401 | return -ENOMEM; | |
402 | ||
403 | r = inet_pton(AF_INET, addr_str, &(addresses[size])); | |
404 | if (r <= 0) | |
405 | continue; | |
406 | ||
313cefa1 | 407 | size++; |
09bee74d TG |
408 | } |
409 | ||
09bee74d TG |
410 | *ret = addresses; |
411 | addresses = NULL; | |
412 | ||
a2ba62c7 | 413 | return size; |
09bee74d TG |
414 | } |
415 | ||
b729fa14 PF |
416 | void serialize_in6_addrs(FILE *f, const struct in6_addr *addresses, |
417 | size_t size) { | |
418 | unsigned i; | |
419 | ||
420 | assert(f); | |
421 | assert(addresses); | |
422 | assert(size); | |
423 | ||
424 | for (i = 0; i < size; i++) | |
4d7b83da TG |
425 | fprintf(f, SD_NDISC_ADDRESS_FORMAT_STR"%s", |
426 | SD_NDISC_ADDRESS_FORMAT_VAL(addresses[i]), | |
b729fa14 PF |
427 | (i < (size - 1)) ? " ": ""); |
428 | } | |
429 | ||
a2ba62c7 | 430 | int deserialize_in6_addrs(struct in6_addr **ret, const char *string) { |
09bee74d | 431 | _cleanup_free_ struct in6_addr *addresses = NULL; |
a2ba62c7 | 432 | int size = 0; |
a2a5291b | 433 | const char *word, *state; |
09bee74d TG |
434 | size_t len; |
435 | ||
436 | assert(ret); | |
09bee74d TG |
437 | assert(string); |
438 | ||
439 | FOREACH_WORD(word, len, string, state) { | |
440 | _cleanup_free_ char *addr_str = NULL; | |
441 | struct in6_addr *new_addresses; | |
442 | int r; | |
443 | ||
444 | new_addresses = realloc(addresses, (size + 1) * sizeof(struct in6_addr)); | |
445 | if (!new_addresses) | |
446 | return -ENOMEM; | |
447 | else | |
448 | addresses = new_addresses; | |
449 | ||
450 | addr_str = strndup(word, len); | |
451 | if (!addr_str) | |
452 | return -ENOMEM; | |
453 | ||
454 | r = inet_pton(AF_INET6, addr_str, &(addresses[size])); | |
455 | if (r <= 0) | |
456 | continue; | |
457 | ||
458 | size++; | |
459 | } | |
460 | ||
09bee74d TG |
461 | *ret = addresses; |
462 | addresses = NULL; | |
463 | ||
a2ba62c7 | 464 | return size; |
09bee74d | 465 | } |
e1ea665e | 466 | |
f8693fc7 | 467 | void serialize_dhcp_routes(FILE *f, const char *key, sd_dhcp_route **routes, size_t size) { |
e1ea665e EY |
468 | unsigned i; |
469 | ||
470 | assert(f); | |
471 | assert(key); | |
472 | assert(routes); | |
473 | assert(size); | |
474 | ||
475 | fprintf(f, "%s=", key); | |
476 | ||
fbf7dcb5 | 477 | for (i = 0; i < size; i++) { |
f8693fc7 BG |
478 | struct in_addr dest, gw; |
479 | uint8_t length; | |
480 | ||
481 | assert_se(sd_dhcp_route_get_destination(routes[i], &dest) >= 0); | |
482 | assert_se(sd_dhcp_route_get_gateway(routes[i], &gw) >= 0); | |
483 | assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &length) >= 0); | |
484 | ||
485 | fprintf(f, "%s/%" PRIu8, inet_ntoa(dest), length); | |
486 | fprintf(f, ",%s%s", inet_ntoa(gw), (i < (size - 1)) ? " ": ""); | |
fbf7dcb5 | 487 | } |
e1ea665e EY |
488 | |
489 | fputs("\n", f); | |
490 | } | |
491 | ||
492 | int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, size_t *ret_allocated, const char *string) { | |
493 | _cleanup_free_ struct sd_dhcp_route *routes = NULL; | |
494 | size_t size = 0, allocated = 0; | |
a2a5291b | 495 | const char *word, *state; |
e1ea665e EY |
496 | size_t len; |
497 | ||
498 | assert(ret); | |
499 | assert(ret_size); | |
500 | assert(ret_allocated); | |
501 | assert(string); | |
502 | ||
503 | FOREACH_WORD(word, len, string, state) { | |
504 | /* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */ | |
69f08c83 | 505 | _cleanup_free_ char* entry = NULL; |
e1ea665e EY |
506 | char *tok, *tok_end; |
507 | unsigned n; | |
508 | int r; | |
509 | ||
510 | if (!GREEDY_REALLOC(routes, allocated, size + 1)) | |
511 | return -ENOMEM; | |
512 | ||
513 | entry = strndup(word, len); | |
9ed794a3 | 514 | if (!entry) |
31db0120 | 515 | return -ENOMEM; |
e1ea665e EY |
516 | |
517 | tok = entry; | |
518 | ||
519 | /* get the subnet */ | |
520 | tok_end = strchr(tok, '/'); | |
521 | if (!tok_end) | |
522 | continue; | |
523 | *tok_end = '\0'; | |
524 | ||
525 | r = inet_aton(tok, &routes[size].dst_addr); | |
526 | if (r == 0) | |
527 | continue; | |
528 | ||
529 | tok = tok_end + 1; | |
530 | ||
531 | /* get the prefixlen */ | |
532 | tok_end = strchr(tok, ','); | |
533 | if (!tok_end) | |
534 | continue; | |
535 | ||
536 | *tok_end = '\0'; | |
537 | ||
538 | r = safe_atou(tok, &n); | |
539 | if (r < 0 || n > 32) | |
540 | continue; | |
541 | ||
542 | routes[size].dst_prefixlen = (uint8_t) n; | |
543 | tok = tok_end + 1; | |
544 | ||
545 | /* get the gateway */ | |
546 | r = inet_aton(tok, &routes[size].gw_addr); | |
547 | if (r == 0) | |
548 | continue; | |
549 | ||
550 | size++; | |
551 | } | |
552 | ||
553 | *ret_size = size; | |
554 | *ret_allocated = allocated; | |
555 | *ret = routes; | |
556 | routes = NULL; | |
557 | ||
558 | return 0; | |
559 | } | |
a073309f | 560 | |
e4735228 | 561 | int serialize_dhcp_option(FILE *f, const char *key, const void *data, size_t size) { |
a073309f AC |
562 | _cleanup_free_ char *hex_buf = NULL; |
563 | ||
564 | assert(f); | |
565 | assert(key); | |
566 | assert(data); | |
567 | ||
568 | hex_buf = hexmem(data, size); | |
569 | if (hex_buf == NULL) | |
570 | return -ENOMEM; | |
571 | ||
572 | fprintf(f, "%s=%s\n", key, hex_buf); | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
e4735228 | 577 | int deserialize_dhcp_option(void **data, size_t *data_len, const char *string) { |
a073309f AC |
578 | assert(data); |
579 | assert(data_len); | |
580 | assert(string); | |
581 | ||
582 | if (strlen(string) % 2) | |
583 | return -EINVAL; | |
584 | ||
585 | return unhexmem(string, strlen(string), (void **)data, data_len); | |
586 | } |