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0b843d35 CB |
1 | /* liblxcapi |
2 | * | |
3 | * Copyright © 2017 Christian Brauner <christian.brauner@ubuntu.com>. | |
4 | * Copyright © 2017 Canonical Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2, as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
19 | ||
ce2f5ae8 CB |
20 | #include "config.h" |
21 | ||
f9373e40 | 22 | #include <ctype.h> |
0b843d35 | 23 | #include <stdio.h> |
ce2f5ae8 | 24 | #include <stdlib.h> |
0b843d35 | 25 | #include <string.h> |
9b0df30f | 26 | #include <arpa/inet.h> |
0b843d35 | 27 | |
663e9916 | 28 | #include "conf.h" |
ce2f5ae8 CB |
29 | #include "confile.h" |
30 | #include "confile_utils.h" | |
31 | #include "error.h" | |
663e9916 | 32 | #include "log.h" |
ce2f5ae8 | 33 | #include "list.h" |
811ef482 | 34 | #include "network.h" |
f9373e40 | 35 | #include "parse.h" |
0b843d35 CB |
36 | #include "utils.h" |
37 | ||
ce2f5ae8 CB |
38 | lxc_log_define(lxc_confile_utils, lxc); |
39 | ||
0b843d35 CB |
40 | int parse_idmaps(const char *idmap, char *type, unsigned long *nsid, |
41 | unsigned long *hostid, unsigned long *range) | |
42 | { | |
43 | int ret = -1; | |
44 | unsigned long tmp_hostid, tmp_nsid, tmp_range; | |
45 | char tmp_type; | |
46 | char *window, *slide; | |
47 | char *dup = NULL; | |
48 | ||
49 | /* Duplicate string. */ | |
50 | dup = strdup(idmap); | |
51 | if (!dup) | |
52 | goto on_error; | |
53 | ||
54 | /* A prototypical idmap entry would be: "u 1000 1000000 65536" */ | |
55 | ||
56 | /* align */ | |
57 | slide = window = dup; | |
58 | /* skip whitespace */ | |
59 | slide += strspn(slide, " \t\r"); | |
60 | if (slide != window && *slide == '\0') | |
61 | goto on_error; | |
62 | ||
63 | /* Validate type. */ | |
64 | if (*slide != 'u' && *slide != 'g') | |
65 | goto on_error; | |
66 | /* Assign type. */ | |
67 | tmp_type = *slide; | |
68 | ||
69 | /* move beyond type */ | |
70 | slide++; | |
71 | /* align */ | |
72 | window = slide; | |
73 | /* Validate that only whitespace follows. */ | |
74 | slide += strspn(slide, " \t\r"); | |
75 | /* There must be whitespace. */ | |
76 | if (slide == window) | |
77 | goto on_error; | |
78 | ||
79 | /* Mark beginning of nsuid. */ | |
80 | window = slide; | |
81 | /* Validate that non-whitespace follows. */ | |
82 | slide += strcspn(slide, " \t\r"); | |
83 | /* There must be non-whitespace. */ | |
84 | if (slide == window || *slide == '\0') | |
85 | goto on_error; | |
86 | /* Mark end of nsuid. */ | |
87 | *slide = '\0'; | |
88 | ||
89 | /* Parse nsuid. */ | |
90 | if (lxc_safe_ulong(window, &tmp_nsid) < 0) | |
91 | goto on_error; | |
92 | ||
93 | /* Move beyond \0. */ | |
94 | slide++; | |
0b843d35 CB |
95 | /* Validate that only whitespace follows. */ |
96 | slide += strspn(slide, " \t\r"); | |
97 | /* If there was only one whitespace then we whiped it with our \0 above. | |
98 | * So only ensure that we're not at the end of the string. | |
99 | */ | |
100 | if (*slide == '\0') | |
101 | goto on_error; | |
102 | ||
103 | /* Mark beginning of hostid. */ | |
104 | window = slide; | |
105 | /* Validate that non-whitespace follows. */ | |
106 | slide += strcspn(slide, " \t\r"); | |
107 | /* There must be non-whitespace. */ | |
108 | if (slide == window || *slide == '\0') | |
109 | goto on_error; | |
110 | /* Mark end of nsuid. */ | |
111 | *slide = '\0'; | |
112 | ||
113 | /* Parse hostid. */ | |
114 | if (lxc_safe_ulong(window, &tmp_hostid) < 0) | |
115 | goto on_error; | |
116 | ||
117 | /* Move beyond \0. */ | |
118 | slide++; | |
0b843d35 CB |
119 | /* Validate that only whitespace follows. */ |
120 | slide += strspn(slide, " \t\r"); | |
121 | /* If there was only one whitespace then we whiped it with our \0 above. | |
122 | * So only ensure that we're not at the end of the string. | |
123 | */ | |
124 | if (*slide == '\0') | |
125 | goto on_error; | |
126 | ||
127 | /* Mark beginning of range. */ | |
128 | window = slide; | |
129 | /* Validate that non-whitespace follows. */ | |
130 | slide += strcspn(slide, " \t\r"); | |
131 | /* There must be non-whitespace. */ | |
132 | if (slide == window) | |
133 | goto on_error; | |
134 | ||
135 | /* The range is the last valid entry we expect. So make sure that there | |
136 | * is not trailing garbage and if there is, error out. | |
137 | */ | |
138 | if (*(slide + strspn(slide, " \t\r\n")) != '\0') | |
139 | goto on_error; | |
140 | /* Mark end of range. */ | |
141 | *slide = '\0'; | |
142 | ||
143 | /* Parse range. */ | |
144 | if (lxc_safe_ulong(window, &tmp_range) < 0) | |
145 | goto on_error; | |
146 | ||
147 | *type = tmp_type; | |
148 | *nsid = tmp_nsid; | |
149 | *hostid = tmp_hostid; | |
150 | *range = tmp_range; | |
151 | ||
152 | /* Yay, we survived. */ | |
153 | ret = 0; | |
154 | ||
155 | on_error: | |
156 | free(dup); | |
157 | ||
158 | return ret; | |
159 | } | |
663e9916 CB |
160 | |
161 | bool lxc_config_value_empty(const char *value) | |
162 | { | |
163 | if (value && strlen(value) > 0) | |
164 | return false; | |
165 | ||
166 | return true; | |
167 | } | |
ce2f5ae8 | 168 | |
c302b476 | 169 | struct lxc_netdev *lxc_network_add(struct lxc_list *networks, int idx, bool tail) |
ce2f5ae8 CB |
170 | { |
171 | struct lxc_list *newlist; | |
172 | struct lxc_netdev *netdev = NULL; | |
ce2f5ae8 CB |
173 | |
174 | /* network does not exist */ | |
175 | netdev = malloc(sizeof(*netdev)); | |
176 | if (!netdev) | |
177 | return NULL; | |
178 | ||
179 | memset(netdev, 0, sizeof(*netdev)); | |
180 | lxc_list_init(&netdev->ipv4); | |
181 | lxc_list_init(&netdev->ipv6); | |
182 | ||
183 | /* give network a unique index */ | |
184 | netdev->idx = idx; | |
185 | ||
186 | /* prepare new list */ | |
187 | newlist = malloc(sizeof(*newlist)); | |
188 | if (!newlist) { | |
189 | free(netdev); | |
190 | return NULL; | |
191 | } | |
192 | ||
193 | lxc_list_init(newlist); | |
194 | newlist->elem = netdev; | |
195 | ||
c302b476 CB |
196 | if (tail) |
197 | lxc_list_add_tail(networks, newlist); | |
198 | else | |
199 | lxc_list_add(networks, newlist); | |
ce2f5ae8 CB |
200 | return netdev; |
201 | } | |
1ed6ba91 | 202 | |
c302b476 CB |
203 | /* Takes care of finding the correct netdev struct in the networks list or |
204 | * allocates a new one if it couldn't be found. | |
205 | */ | |
206 | struct lxc_netdev *lxc_get_netdev_by_idx(struct lxc_conf *conf, | |
207 | unsigned int idx, bool allocate) | |
208 | { | |
209 | struct lxc_netdev *netdev = NULL; | |
210 | struct lxc_list *networks = &conf->network; | |
211 | struct lxc_list *insert = networks; | |
212 | ||
213 | /* lookup network */ | |
214 | if (!lxc_list_empty(networks)) { | |
215 | lxc_list_for_each(insert, networks) { | |
216 | netdev = insert->elem; | |
217 | if (netdev->idx == idx) | |
218 | return netdev; | |
219 | else if (netdev->idx > idx) | |
220 | break; | |
221 | } | |
222 | } | |
223 | ||
224 | if (!allocate) | |
225 | return NULL; | |
226 | ||
227 | return lxc_network_add(insert, idx, true); | |
228 | } | |
229 | ||
1ed6ba91 CB |
230 | void lxc_log_configured_netdevs(const struct lxc_conf *conf) |
231 | { | |
232 | struct lxc_netdev *netdev; | |
233 | struct lxc_list *it = (struct lxc_list *)&conf->network;; | |
234 | ||
235 | if ((conf->loglevel != LXC_LOG_LEVEL_TRACE) && | |
236 | (lxc_log_get_level() != LXC_LOG_LEVEL_TRACE)) | |
237 | return; | |
238 | ||
239 | if (lxc_list_empty(it)) { | |
240 | TRACE("container has no networks configured"); | |
241 | return; | |
242 | } | |
243 | ||
244 | lxc_list_for_each(it, &conf->network) { | |
9b0df30f CB |
245 | struct lxc_list *cur, *next; |
246 | struct lxc_inetdev *inet4dev; | |
247 | struct lxc_inet6dev *inet6dev; | |
248 | char bufinet4[INET_ADDRSTRLEN], bufinet6[INET6_ADDRSTRLEN]; | |
249 | ||
1ed6ba91 CB |
250 | netdev = it->elem; |
251 | ||
c302b476 | 252 | TRACE("index: %zd", netdev->idx); |
7a582518 | 253 | TRACE("ifindex: %d", netdev->ifindex); |
1ed6ba91 CB |
254 | switch (netdev->type) { |
255 | case LXC_NET_VETH: | |
256 | TRACE("type: veth"); | |
de4855a8 | 257 | if (netdev->priv.veth_attr.pair[0] != '\0') |
9b0df30f CB |
258 | TRACE("veth pair: %s", |
259 | netdev->priv.veth_attr.pair); | |
8ce727fc CB |
260 | if (netdev->priv.veth_attr.veth1[0] != '\0') |
261 | TRACE("veth1 : %s", | |
262 | netdev->priv.veth_attr.veth1); | |
d952b351 CB |
263 | if (netdev->priv.veth_attr.ifindex > 0) |
264 | TRACE("host side ifindex for veth device: %d", | |
265 | netdev->priv.veth_attr.ifindex); | |
1ed6ba91 CB |
266 | break; |
267 | case LXC_NET_MACVLAN: | |
268 | TRACE("type: macvlan"); | |
9b0df30f CB |
269 | if (netdev->priv.macvlan_attr.mode > 0) { |
270 | char *macvlan_mode; | |
271 | macvlan_mode = lxc_macvlan_flag_to_mode( | |
272 | netdev->priv.macvlan_attr.mode); | |
273 | TRACE("macvlan mode: %s", | |
274 | macvlan_mode ? macvlan_mode | |
275 | : "(invalid mode)"); | |
276 | } | |
1ed6ba91 CB |
277 | break; |
278 | case LXC_NET_VLAN: | |
279 | TRACE("type: vlan"); | |
9b0df30f | 280 | TRACE("vlan id: %d", netdev->priv.vlan_attr.vid); |
1ed6ba91 CB |
281 | break; |
282 | case LXC_NET_PHYS: | |
283 | TRACE("type: phys"); | |
b809f232 CB |
284 | if (netdev->priv.phys_attr.ifindex > 0) { |
285 | TRACE("host side ifindex for phys device: %d", | |
286 | netdev->priv.phys_attr.ifindex); | |
287 | } | |
1ed6ba91 CB |
288 | break; |
289 | case LXC_NET_EMPTY: | |
290 | TRACE("type: empty"); | |
291 | break; | |
292 | case LXC_NET_NONE: | |
293 | TRACE("type: none"); | |
294 | break; | |
295 | default: | |
296 | ERROR("invalid network type %d", netdev->type); | |
297 | return; | |
298 | } | |
299 | ||
9b0df30f CB |
300 | if (netdev->type != LXC_NET_EMPTY) { |
301 | TRACE("flags: %s", | |
302 | netdev->flags == IFF_UP ? "up" : "none"); | |
de4855a8 | 303 | if (netdev->link[0] != '\0') |
9b0df30f | 304 | TRACE("link: %s", netdev->link); |
de4855a8 | 305 | if (netdev->name[0] != '\0') |
9b0df30f CB |
306 | TRACE("name: %s", netdev->name); |
307 | if (netdev->hwaddr) | |
308 | TRACE("hwaddr: %s", netdev->hwaddr); | |
309 | if (netdev->mtu) | |
310 | TRACE("mtu: %s", netdev->mtu); | |
311 | if (netdev->upscript) | |
312 | TRACE("upscript: %s", netdev->upscript); | |
313 | if (netdev->downscript) | |
314 | TRACE("downscript: %s", netdev->downscript); | |
315 | ||
316 | TRACE("ipv4 gateway auto: %s", | |
317 | netdev->ipv4_gateway_auto ? "true" : "false"); | |
318 | ||
319 | if (netdev->ipv4_gateway) { | |
320 | inet_ntop(AF_INET, netdev->ipv4_gateway, | |
321 | bufinet4, sizeof(bufinet4)); | |
322 | TRACE("ipv4 gateway: %s", bufinet4); | |
323 | } | |
324 | ||
325 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { | |
326 | inet4dev = cur->elem; | |
327 | inet_ntop(AF_INET, &inet4dev->addr, bufinet4, | |
328 | sizeof(bufinet4)); | |
329 | TRACE("ipv4 addr: %s", bufinet4); | |
330 | } | |
331 | ||
332 | TRACE("ipv6 gateway auto: %s", | |
333 | netdev->ipv6_gateway_auto ? "true" : "false"); | |
334 | if (netdev->ipv6_gateway) { | |
335 | inet_ntop(AF_INET6, netdev->ipv6_gateway, | |
336 | bufinet6, sizeof(bufinet6)); | |
337 | TRACE("ipv6 gateway: %s", bufinet6); | |
338 | } | |
339 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
340 | inet6dev = cur->elem; | |
341 | inet_ntop(AF_INET6, &inet6dev->addr, bufinet6, | |
342 | sizeof(bufinet6)); | |
343 | TRACE("ipv6 addr: %s", bufinet6); | |
344 | } | |
345 | } | |
1ed6ba91 CB |
346 | } |
347 | } | |
519df1c1 | 348 | |
e5d2fd7c CB |
349 | static void lxc_free_netdev(struct lxc_netdev *netdev) |
350 | { | |
351 | struct lxc_list *cur, *next; | |
352 | ||
e5d2fd7c CB |
353 | free(netdev->upscript); |
354 | free(netdev->downscript); | |
355 | free(netdev->hwaddr); | |
356 | free(netdev->mtu); | |
357 | ||
358 | free(netdev->ipv4_gateway); | |
359 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { | |
360 | lxc_list_del(cur); | |
361 | free(cur->elem); | |
362 | free(cur); | |
363 | } | |
364 | ||
365 | free(netdev->ipv6_gateway); | |
366 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
367 | lxc_list_del(cur); | |
368 | free(cur->elem); | |
369 | free(cur); | |
370 | } | |
371 | ||
372 | free(netdev); | |
373 | } | |
374 | ||
519df1c1 CB |
375 | bool lxc_remove_nic_by_idx(struct lxc_conf *conf, unsigned int idx) |
376 | { | |
e5d2fd7c | 377 | struct lxc_list *cur, *next; |
519df1c1 CB |
378 | struct lxc_netdev *netdev; |
379 | bool found = false; | |
380 | ||
381 | lxc_list_for_each_safe(cur, &conf->network, next) { | |
382 | netdev = cur->elem; | |
383 | if (netdev->idx != idx) | |
384 | continue; | |
385 | ||
386 | lxc_list_del(cur); | |
387 | found = true; | |
388 | break; | |
389 | } | |
390 | ||
391 | if (!found) | |
392 | return false; | |
393 | ||
e5d2fd7c | 394 | lxc_free_netdev(netdev); |
519df1c1 CB |
395 | free(cur); |
396 | ||
397 | return true; | |
398 | } | |
e5d2fd7c | 399 | |
c302b476 | 400 | void lxc_free_networks(struct lxc_list *networks) |
e5d2fd7c CB |
401 | { |
402 | struct lxc_list *cur, *next; | |
403 | struct lxc_netdev *netdev; | |
404 | ||
c302b476 | 405 | lxc_list_for_each_safe(cur, networks, next) { |
e5d2fd7c CB |
406 | netdev = cur->elem; |
407 | lxc_free_netdev(netdev); | |
408 | free(cur); | |
409 | } | |
410 | ||
411 | /* prevent segfaults */ | |
c302b476 | 412 | lxc_list_init(networks); |
e5d2fd7c | 413 | } |
9b0df30f CB |
414 | |
415 | static struct macvlan_mode { | |
416 | char *name; | |
417 | int mode; | |
418 | } macvlan_mode[] = { | |
419 | { "private", MACVLAN_MODE_PRIVATE }, | |
420 | { "vepa", MACVLAN_MODE_VEPA }, | |
421 | { "bridge", MACVLAN_MODE_BRIDGE }, | |
422 | { "passthru", MACVLAN_MODE_PASSTHRU }, | |
423 | }; | |
424 | ||
425 | int lxc_macvlan_mode_to_flag(int *mode, const char *value) | |
426 | { | |
427 | size_t i; | |
428 | ||
429 | for (i = 0; i < sizeof(macvlan_mode) / sizeof(macvlan_mode[0]); i++) { | |
430 | if (strcmp(macvlan_mode[i].name, value)) | |
431 | continue; | |
432 | ||
433 | *mode = macvlan_mode[i].mode; | |
434 | return 0; | |
435 | } | |
436 | ||
437 | return -1; | |
438 | } | |
439 | ||
440 | char *lxc_macvlan_flag_to_mode(int mode) | |
441 | { | |
442 | size_t i; | |
443 | ||
444 | for (i = 0; i < sizeof(macvlan_mode) / sizeof(macvlan_mode[0]); i++) { | |
445 | if (macvlan_mode[i].mode == mode) | |
446 | continue; | |
447 | ||
448 | return macvlan_mode[i].name; | |
449 | } | |
450 | ||
451 | return NULL; | |
452 | } | |
f9373e40 CB |
453 | |
454 | int set_config_string_item(char **conf_item, const char *value) | |
455 | { | |
456 | char *new_value; | |
457 | ||
458 | if (lxc_config_value_empty(value)) { | |
459 | free(*conf_item); | |
460 | *conf_item = NULL; | |
461 | return 0; | |
462 | } | |
463 | ||
464 | new_value = strdup(value); | |
465 | if (!new_value) { | |
466 | SYSERROR("failed to duplicate string \"%s\"", value); | |
467 | return -1; | |
468 | } | |
469 | ||
470 | free(*conf_item); | |
471 | *conf_item = new_value; | |
472 | return 0; | |
473 | } | |
474 | ||
475 | int set_config_string_item_max(char **conf_item, const char *value, size_t max) | |
476 | { | |
477 | if (strlen(value) >= max) { | |
478 | ERROR("%s is too long (>= %lu)", value, (unsigned long)max); | |
479 | return -1; | |
480 | } | |
481 | ||
482 | return set_config_string_item(conf_item, value); | |
483 | } | |
484 | ||
485 | int set_config_path_item(char **conf_item, const char *value) | |
486 | { | |
487 | return set_config_string_item_max(conf_item, value, PATH_MAX); | |
488 | } | |
489 | ||
490 | int config_ip_prefix(struct in_addr *addr) | |
491 | { | |
492 | if (IN_CLASSA(addr->s_addr)) | |
493 | return 32 - IN_CLASSA_NSHIFT; | |
494 | if (IN_CLASSB(addr->s_addr)) | |
495 | return 32 - IN_CLASSB_NSHIFT; | |
496 | if (IN_CLASSC(addr->s_addr)) | |
497 | return 32 - IN_CLASSC_NSHIFT; | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
de4855a8 | 502 | int network_ifname(char *valuep, const char *value) |
f9373e40 | 503 | { |
de4855a8 CB |
504 | if (strlen(value) >= IFNAMSIZ) { |
505 | ERROR("Network devie name \"%s\" is too long (>= %zu)", value, | |
506 | (size_t)IFNAMSIZ); | |
507 | } | |
508 | ||
509 | strcpy(valuep, value); | |
510 | return 0; | |
f9373e40 CB |
511 | } |
512 | ||
513 | int rand_complete_hwaddr(char *hwaddr) | |
514 | { | |
515 | const char hex[] = "0123456789abcdef"; | |
516 | char *curs = hwaddr; | |
517 | ||
518 | #ifndef HAVE_RAND_R | |
519 | randseed(true); | |
520 | #else | |
521 | unsigned int seed; | |
522 | ||
523 | seed = randseed(false); | |
524 | #endif | |
525 | while (*curs != '\0' && *curs != '\n') { | |
526 | if (*curs == 'x' || *curs == 'X') { | |
527 | if (curs - hwaddr == 1) { | |
528 | /* ensure address is unicast */ | |
529 | #ifdef HAVE_RAND_R | |
530 | *curs = hex[rand_r(&seed) & 0x0E]; | |
531 | } else { | |
532 | *curs = hex[rand_r(&seed) & 0x0F]; | |
533 | #else | |
534 | *curs = hex[rand() & 0x0E]; | |
535 | } else { | |
536 | *curs = hex[rand() & 0x0F]; | |
537 | #endif | |
538 | } | |
539 | } | |
540 | curs++; | |
541 | } | |
542 | return 0; | |
543 | } | |
544 | ||
ce4be612 | 545 | bool lxc_config_net_hwaddr(const char *line) |
546 | { | |
547 | char *copy, *p; | |
548 | ||
549 | if (strncmp(line, "lxc.net", 7) != 0) | |
550 | return false; | |
551 | if (strncmp(line, "lxc.network.hwaddr", 18) == 0) | |
552 | return true; | |
553 | ||
554 | /* We have to dup the line, if line is something like | |
555 | * "lxc.net.[i].xxx = xxxxx ", we need to remove | |
556 | * '[i]' and compare its key with 'lxc.net.hwaddr'*/ | |
557 | copy = strdup(line); | |
558 | if (!copy) { | |
559 | SYSERROR("failed to allocate memory"); | |
560 | return false; | |
561 | } | |
562 | if (*(copy + 8) >= '0' && *(copy + 8) <= '9') { | |
563 | p = strchr(copy + 8, '.'); | |
564 | if (!p) { | |
565 | free(copy); | |
566 | return false; | |
567 | } | |
568 | /* strlen("hwaddr") = 6 */ | |
569 | strncpy(copy + 8, p + 1, 6); | |
570 | copy[8 + 6] = '\0'; | |
571 | } | |
572 | if (strncmp(copy, "lxc.net.hwaddr", 14) == 0) { | |
573 | free(copy); | |
574 | return true; | |
575 | } | |
576 | free(copy); | |
577 | ||
578 | /* We have to dup the line second time, if line is something like | |
579 | * "lxc.network.[i].xxx = xxxxx ", we need to remove | |
580 | * '[i]' and compare its key with 'lxc.network.hwaddr'*/ | |
581 | copy = strdup(line); | |
582 | if (!copy) { | |
583 | SYSERROR("failed to allocate memory"); | |
584 | return false; | |
585 | } | |
586 | if (*(copy + 12) >= '0' && *(copy + 12) <= '9') { | |
587 | p = strchr(copy + 12, '.'); | |
588 | if (!p) { | |
589 | free(copy); | |
590 | return false; | |
591 | } | |
592 | /* strlen("hwaddr") = 6 */ | |
593 | strncpy(copy + 12, p + 1, 6); | |
594 | copy[12 + 6] = '\0'; | |
595 | } | |
596 | if (strncmp(copy, "lxc.network.hwaddr", 18) == 0) { | |
597 | free(copy); | |
598 | return true; | |
599 | } | |
600 | ||
601 | free(copy); | |
602 | return false; | |
603 | } | |
604 | ||
f9373e40 | 605 | /* |
ae1dc8b4 | 606 | * If we find a lxc.net.[i].hwaddr or lxc.network.hwaddr in the original config |
607 | * file, we expand it in the unexpanded_config, so that after a save_config we | |
608 | * store the hwaddr for re-use. | |
f9373e40 CB |
609 | * This is only called when reading the config file, not when executing a |
610 | * lxc.include. | |
611 | * 'x' and 'X' are substituted in-place. | |
612 | */ | |
613 | void update_hwaddr(const char *line) | |
614 | { | |
615 | char *p; | |
616 | ||
617 | line += lxc_char_left_gc(line, strlen(line)); | |
618 | if (line[0] == '#') | |
619 | return; | |
620 | ||
ae1dc8b4 | 621 | if (!lxc_config_net_hwaddr(line)) |
f9373e40 CB |
622 | return; |
623 | ||
624 | /* Let config_net_hwaddr raise the error. */ | |
625 | p = strchr(line, '='); | |
626 | if (!p) | |
627 | return; | |
628 | p++; | |
629 | ||
630 | while (isblank(*p)) | |
631 | p++; | |
632 | ||
633 | if (!*p) | |
634 | return; | |
635 | ||
636 | rand_complete_hwaddr(p); | |
637 | } | |
638 | ||
639 | bool new_hwaddr(char *hwaddr) | |
640 | { | |
641 | int ret; | |
642 | ||
643 | (void)randseed(true); | |
644 | ||
645 | ret = snprintf(hwaddr, 18, "00:16:3e:%02x:%02x:%02x", rand() % 255, | |
646 | rand() % 255, rand() % 255); | |
647 | if (ret < 0 || ret >= 18) { | |
648 | SYSERROR("Failed to call snprintf()."); | |
649 | return false; | |
650 | } | |
651 | ||
652 | return true; | |
653 | } | |
953fe44f CB |
654 | |
655 | int lxc_get_conf_str(char *retv, int inlen, const char *value) | |
656 | { | |
657 | if (!value) | |
658 | return 0; | |
659 | if (retv && inlen >= strlen(value) + 1) | |
660 | strncpy(retv, value, strlen(value) + 1); | |
661 | ||
662 | return strlen(value); | |
663 | } | |
664 | ||
665 | int lxc_get_conf_int(struct lxc_conf *c, char *retv, int inlen, int v) | |
666 | { | |
667 | if (!retv) | |
668 | inlen = 0; | |
669 | else | |
670 | memset(retv, 0, inlen); | |
671 | ||
672 | return snprintf(retv, inlen, "%d", v); | |
673 | } | |
240d4b74 | 674 | |
71460831 | 675 | bool parse_limit_value(const char **value, rlim_t *res) |
240d4b74 | 676 | { |
677 | char *endptr = NULL; | |
678 | ||
679 | if (strncmp(*value, "unlimited", sizeof("unlimited") - 1) == 0) { | |
680 | *res = RLIM_INFINITY; | |
681 | *value += sizeof("unlimited") - 1; | |
682 | return true; | |
683 | } | |
684 | ||
685 | errno = 0; | |
71460831 | 686 | *res = strtoull(*value, &endptr, 10); |
240d4b74 | 687 | if (errno || !endptr) |
688 | return false; | |
689 | *value = endptr; | |
690 | ||
691 | return true; | |
692 | } |