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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" | |
ce2f5ae8 | 32 | #include "list.h" |
28d9e29e CB |
33 | #include "log.h" |
34 | #include "lxccontainer.h" | |
811ef482 | 35 | #include "network.h" |
f9373e40 | 36 | #include "parse.h" |
0b843d35 CB |
37 | #include "utils.h" |
38 | ||
ce2f5ae8 CB |
39 | lxc_log_define(lxc_confile_utils, lxc); |
40 | ||
0b843d35 CB |
41 | int parse_idmaps(const char *idmap, char *type, unsigned long *nsid, |
42 | unsigned long *hostid, unsigned long *range) | |
43 | { | |
44 | int ret = -1; | |
45 | unsigned long tmp_hostid, tmp_nsid, tmp_range; | |
46 | char tmp_type; | |
47 | char *window, *slide; | |
48 | char *dup = NULL; | |
49 | ||
50 | /* Duplicate string. */ | |
51 | dup = strdup(idmap); | |
52 | if (!dup) | |
53 | goto on_error; | |
54 | ||
55 | /* A prototypical idmap entry would be: "u 1000 1000000 65536" */ | |
56 | ||
57 | /* align */ | |
58 | slide = window = dup; | |
59 | /* skip whitespace */ | |
60 | slide += strspn(slide, " \t\r"); | |
61 | if (slide != window && *slide == '\0') | |
62 | goto on_error; | |
63 | ||
64 | /* Validate type. */ | |
65 | if (*slide != 'u' && *slide != 'g') | |
66 | goto on_error; | |
67 | /* Assign type. */ | |
68 | tmp_type = *slide; | |
69 | ||
70 | /* move beyond type */ | |
71 | slide++; | |
72 | /* align */ | |
73 | window = slide; | |
74 | /* Validate that only whitespace follows. */ | |
75 | slide += strspn(slide, " \t\r"); | |
76 | /* There must be whitespace. */ | |
77 | if (slide == window) | |
78 | goto on_error; | |
79 | ||
80 | /* Mark beginning of nsuid. */ | |
81 | window = slide; | |
82 | /* Validate that non-whitespace follows. */ | |
83 | slide += strcspn(slide, " \t\r"); | |
84 | /* There must be non-whitespace. */ | |
85 | if (slide == window || *slide == '\0') | |
86 | goto on_error; | |
87 | /* Mark end of nsuid. */ | |
88 | *slide = '\0'; | |
89 | ||
90 | /* Parse nsuid. */ | |
91 | if (lxc_safe_ulong(window, &tmp_nsid) < 0) | |
92 | goto on_error; | |
93 | ||
94 | /* Move beyond \0. */ | |
95 | slide++; | |
0b843d35 CB |
96 | /* Validate that only whitespace follows. */ |
97 | slide += strspn(slide, " \t\r"); | |
98 | /* If there was only one whitespace then we whiped it with our \0 above. | |
99 | * So only ensure that we're not at the end of the string. | |
100 | */ | |
101 | if (*slide == '\0') | |
102 | goto on_error; | |
103 | ||
104 | /* Mark beginning of hostid. */ | |
105 | window = slide; | |
106 | /* Validate that non-whitespace follows. */ | |
107 | slide += strcspn(slide, " \t\r"); | |
108 | /* There must be non-whitespace. */ | |
109 | if (slide == window || *slide == '\0') | |
110 | goto on_error; | |
111 | /* Mark end of nsuid. */ | |
112 | *slide = '\0'; | |
113 | ||
114 | /* Parse hostid. */ | |
115 | if (lxc_safe_ulong(window, &tmp_hostid) < 0) | |
116 | goto on_error; | |
117 | ||
118 | /* Move beyond \0. */ | |
119 | slide++; | |
0b843d35 CB |
120 | /* Validate that only whitespace follows. */ |
121 | slide += strspn(slide, " \t\r"); | |
122 | /* If there was only one whitespace then we whiped it with our \0 above. | |
123 | * So only ensure that we're not at the end of the string. | |
124 | */ | |
125 | if (*slide == '\0') | |
126 | goto on_error; | |
127 | ||
128 | /* Mark beginning of range. */ | |
129 | window = slide; | |
130 | /* Validate that non-whitespace follows. */ | |
131 | slide += strcspn(slide, " \t\r"); | |
132 | /* There must be non-whitespace. */ | |
133 | if (slide == window) | |
134 | goto on_error; | |
135 | ||
136 | /* The range is the last valid entry we expect. So make sure that there | |
137 | * is not trailing garbage and if there is, error out. | |
138 | */ | |
139 | if (*(slide + strspn(slide, " \t\r\n")) != '\0') | |
140 | goto on_error; | |
141 | /* Mark end of range. */ | |
142 | *slide = '\0'; | |
143 | ||
144 | /* Parse range. */ | |
145 | if (lxc_safe_ulong(window, &tmp_range) < 0) | |
146 | goto on_error; | |
147 | ||
148 | *type = tmp_type; | |
149 | *nsid = tmp_nsid; | |
150 | *hostid = tmp_hostid; | |
151 | *range = tmp_range; | |
152 | ||
153 | /* Yay, we survived. */ | |
154 | ret = 0; | |
155 | ||
156 | on_error: | |
157 | free(dup); | |
158 | ||
159 | return ret; | |
160 | } | |
663e9916 CB |
161 | |
162 | bool lxc_config_value_empty(const char *value) | |
163 | { | |
164 | if (value && strlen(value) > 0) | |
165 | return false; | |
166 | ||
167 | return true; | |
168 | } | |
ce2f5ae8 | 169 | |
c302b476 | 170 | struct lxc_netdev *lxc_network_add(struct lxc_list *networks, int idx, bool tail) |
ce2f5ae8 CB |
171 | { |
172 | struct lxc_list *newlist; | |
173 | struct lxc_netdev *netdev = NULL; | |
ce2f5ae8 CB |
174 | |
175 | /* network does not exist */ | |
176 | netdev = malloc(sizeof(*netdev)); | |
177 | if (!netdev) | |
178 | return NULL; | |
179 | ||
180 | memset(netdev, 0, sizeof(*netdev)); | |
181 | lxc_list_init(&netdev->ipv4); | |
182 | lxc_list_init(&netdev->ipv6); | |
183 | ||
184 | /* give network a unique index */ | |
185 | netdev->idx = idx; | |
186 | ||
187 | /* prepare new list */ | |
188 | newlist = malloc(sizeof(*newlist)); | |
189 | if (!newlist) { | |
190 | free(netdev); | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | lxc_list_init(newlist); | |
195 | newlist->elem = netdev; | |
196 | ||
c302b476 CB |
197 | if (tail) |
198 | lxc_list_add_tail(networks, newlist); | |
199 | else | |
200 | lxc_list_add(networks, newlist); | |
ce2f5ae8 CB |
201 | return netdev; |
202 | } | |
1ed6ba91 | 203 | |
c302b476 CB |
204 | /* Takes care of finding the correct netdev struct in the networks list or |
205 | * allocates a new one if it couldn't be found. | |
206 | */ | |
207 | struct lxc_netdev *lxc_get_netdev_by_idx(struct lxc_conf *conf, | |
208 | unsigned int idx, bool allocate) | |
209 | { | |
210 | struct lxc_netdev *netdev = NULL; | |
211 | struct lxc_list *networks = &conf->network; | |
212 | struct lxc_list *insert = networks; | |
213 | ||
214 | /* lookup network */ | |
215 | if (!lxc_list_empty(networks)) { | |
216 | lxc_list_for_each(insert, networks) { | |
217 | netdev = insert->elem; | |
218 | if (netdev->idx == idx) | |
219 | return netdev; | |
220 | else if (netdev->idx > idx) | |
221 | break; | |
222 | } | |
223 | } | |
224 | ||
225 | if (!allocate) | |
226 | return NULL; | |
227 | ||
228 | return lxc_network_add(insert, idx, true); | |
229 | } | |
230 | ||
1ed6ba91 CB |
231 | void lxc_log_configured_netdevs(const struct lxc_conf *conf) |
232 | { | |
233 | struct lxc_netdev *netdev; | |
234 | struct lxc_list *it = (struct lxc_list *)&conf->network;; | |
235 | ||
236 | if ((conf->loglevel != LXC_LOG_LEVEL_TRACE) && | |
237 | (lxc_log_get_level() != LXC_LOG_LEVEL_TRACE)) | |
238 | return; | |
239 | ||
240 | if (lxc_list_empty(it)) { | |
241 | TRACE("container has no networks configured"); | |
242 | return; | |
243 | } | |
244 | ||
245 | lxc_list_for_each(it, &conf->network) { | |
9b0df30f CB |
246 | struct lxc_list *cur, *next; |
247 | struct lxc_inetdev *inet4dev; | |
248 | struct lxc_inet6dev *inet6dev; | |
249 | char bufinet4[INET_ADDRSTRLEN], bufinet6[INET6_ADDRSTRLEN]; | |
250 | ||
1ed6ba91 CB |
251 | netdev = it->elem; |
252 | ||
c302b476 | 253 | TRACE("index: %zd", netdev->idx); |
7a582518 | 254 | TRACE("ifindex: %d", netdev->ifindex); |
1ed6ba91 CB |
255 | switch (netdev->type) { |
256 | case LXC_NET_VETH: | |
257 | TRACE("type: veth"); | |
de4855a8 | 258 | if (netdev->priv.veth_attr.pair[0] != '\0') |
9b0df30f CB |
259 | TRACE("veth pair: %s", |
260 | netdev->priv.veth_attr.pair); | |
8ce727fc CB |
261 | if (netdev->priv.veth_attr.veth1[0] != '\0') |
262 | TRACE("veth1 : %s", | |
263 | netdev->priv.veth_attr.veth1); | |
d952b351 CB |
264 | if (netdev->priv.veth_attr.ifindex > 0) |
265 | TRACE("host side ifindex for veth device: %d", | |
266 | netdev->priv.veth_attr.ifindex); | |
1ed6ba91 CB |
267 | break; |
268 | case LXC_NET_MACVLAN: | |
269 | TRACE("type: macvlan"); | |
9b0df30f CB |
270 | if (netdev->priv.macvlan_attr.mode > 0) { |
271 | char *macvlan_mode; | |
272 | macvlan_mode = lxc_macvlan_flag_to_mode( | |
273 | netdev->priv.macvlan_attr.mode); | |
274 | TRACE("macvlan mode: %s", | |
275 | macvlan_mode ? macvlan_mode | |
276 | : "(invalid mode)"); | |
277 | } | |
1ed6ba91 CB |
278 | break; |
279 | case LXC_NET_VLAN: | |
280 | TRACE("type: vlan"); | |
9b0df30f | 281 | TRACE("vlan id: %d", netdev->priv.vlan_attr.vid); |
1ed6ba91 CB |
282 | break; |
283 | case LXC_NET_PHYS: | |
284 | TRACE("type: phys"); | |
b809f232 CB |
285 | if (netdev->priv.phys_attr.ifindex > 0) { |
286 | TRACE("host side ifindex for phys device: %d", | |
287 | netdev->priv.phys_attr.ifindex); | |
288 | } | |
1ed6ba91 CB |
289 | break; |
290 | case LXC_NET_EMPTY: | |
291 | TRACE("type: empty"); | |
292 | break; | |
293 | case LXC_NET_NONE: | |
294 | TRACE("type: none"); | |
295 | break; | |
296 | default: | |
297 | ERROR("invalid network type %d", netdev->type); | |
298 | return; | |
299 | } | |
300 | ||
9b0df30f CB |
301 | if (netdev->type != LXC_NET_EMPTY) { |
302 | TRACE("flags: %s", | |
303 | netdev->flags == IFF_UP ? "up" : "none"); | |
de4855a8 | 304 | if (netdev->link[0] != '\0') |
9b0df30f | 305 | TRACE("link: %s", netdev->link); |
de4855a8 | 306 | if (netdev->name[0] != '\0') |
9b0df30f CB |
307 | TRACE("name: %s", netdev->name); |
308 | if (netdev->hwaddr) | |
309 | TRACE("hwaddr: %s", netdev->hwaddr); | |
310 | if (netdev->mtu) | |
311 | TRACE("mtu: %s", netdev->mtu); | |
312 | if (netdev->upscript) | |
313 | TRACE("upscript: %s", netdev->upscript); | |
314 | if (netdev->downscript) | |
315 | TRACE("downscript: %s", netdev->downscript); | |
316 | ||
317 | TRACE("ipv4 gateway auto: %s", | |
318 | netdev->ipv4_gateway_auto ? "true" : "false"); | |
319 | ||
320 | if (netdev->ipv4_gateway) { | |
321 | inet_ntop(AF_INET, netdev->ipv4_gateway, | |
322 | bufinet4, sizeof(bufinet4)); | |
323 | TRACE("ipv4 gateway: %s", bufinet4); | |
324 | } | |
325 | ||
326 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { | |
327 | inet4dev = cur->elem; | |
328 | inet_ntop(AF_INET, &inet4dev->addr, bufinet4, | |
329 | sizeof(bufinet4)); | |
330 | TRACE("ipv4 addr: %s", bufinet4); | |
331 | } | |
332 | ||
333 | TRACE("ipv6 gateway auto: %s", | |
334 | netdev->ipv6_gateway_auto ? "true" : "false"); | |
335 | if (netdev->ipv6_gateway) { | |
336 | inet_ntop(AF_INET6, netdev->ipv6_gateway, | |
337 | bufinet6, sizeof(bufinet6)); | |
338 | TRACE("ipv6 gateway: %s", bufinet6); | |
339 | } | |
340 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
341 | inet6dev = cur->elem; | |
342 | inet_ntop(AF_INET6, &inet6dev->addr, bufinet6, | |
343 | sizeof(bufinet6)); | |
344 | TRACE("ipv6 addr: %s", bufinet6); | |
345 | } | |
346 | } | |
1ed6ba91 CB |
347 | } |
348 | } | |
519df1c1 | 349 | |
e5d2fd7c CB |
350 | static void lxc_free_netdev(struct lxc_netdev *netdev) |
351 | { | |
352 | struct lxc_list *cur, *next; | |
353 | ||
e5d2fd7c CB |
354 | free(netdev->upscript); |
355 | free(netdev->downscript); | |
356 | free(netdev->hwaddr); | |
357 | free(netdev->mtu); | |
358 | ||
359 | free(netdev->ipv4_gateway); | |
360 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { | |
361 | lxc_list_del(cur); | |
362 | free(cur->elem); | |
363 | free(cur); | |
364 | } | |
365 | ||
366 | free(netdev->ipv6_gateway); | |
367 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
368 | lxc_list_del(cur); | |
369 | free(cur->elem); | |
370 | free(cur); | |
371 | } | |
372 | ||
373 | free(netdev); | |
374 | } | |
375 | ||
519df1c1 CB |
376 | bool lxc_remove_nic_by_idx(struct lxc_conf *conf, unsigned int idx) |
377 | { | |
e5d2fd7c | 378 | struct lxc_list *cur, *next; |
519df1c1 CB |
379 | struct lxc_netdev *netdev; |
380 | bool found = false; | |
381 | ||
382 | lxc_list_for_each_safe(cur, &conf->network, next) { | |
383 | netdev = cur->elem; | |
384 | if (netdev->idx != idx) | |
385 | continue; | |
386 | ||
387 | lxc_list_del(cur); | |
388 | found = true; | |
389 | break; | |
390 | } | |
391 | ||
392 | if (!found) | |
393 | return false; | |
394 | ||
e5d2fd7c | 395 | lxc_free_netdev(netdev); |
519df1c1 CB |
396 | free(cur); |
397 | ||
398 | return true; | |
399 | } | |
e5d2fd7c | 400 | |
c302b476 | 401 | void lxc_free_networks(struct lxc_list *networks) |
e5d2fd7c CB |
402 | { |
403 | struct lxc_list *cur, *next; | |
404 | struct lxc_netdev *netdev; | |
405 | ||
c302b476 | 406 | lxc_list_for_each_safe(cur, networks, next) { |
e5d2fd7c CB |
407 | netdev = cur->elem; |
408 | lxc_free_netdev(netdev); | |
409 | free(cur); | |
410 | } | |
411 | ||
412 | /* prevent segfaults */ | |
c302b476 | 413 | lxc_list_init(networks); |
e5d2fd7c | 414 | } |
9b0df30f CB |
415 | |
416 | static struct macvlan_mode { | |
417 | char *name; | |
418 | int mode; | |
419 | } macvlan_mode[] = { | |
420 | { "private", MACVLAN_MODE_PRIVATE }, | |
421 | { "vepa", MACVLAN_MODE_VEPA }, | |
422 | { "bridge", MACVLAN_MODE_BRIDGE }, | |
423 | { "passthru", MACVLAN_MODE_PASSTHRU }, | |
424 | }; | |
425 | ||
426 | int lxc_macvlan_mode_to_flag(int *mode, const char *value) | |
427 | { | |
428 | size_t i; | |
429 | ||
430 | for (i = 0; i < sizeof(macvlan_mode) / sizeof(macvlan_mode[0]); i++) { | |
431 | if (strcmp(macvlan_mode[i].name, value)) | |
432 | continue; | |
433 | ||
434 | *mode = macvlan_mode[i].mode; | |
435 | return 0; | |
436 | } | |
437 | ||
438 | return -1; | |
439 | } | |
440 | ||
441 | char *lxc_macvlan_flag_to_mode(int mode) | |
442 | { | |
443 | size_t i; | |
444 | ||
445 | for (i = 0; i < sizeof(macvlan_mode) / sizeof(macvlan_mode[0]); i++) { | |
446 | if (macvlan_mode[i].mode == mode) | |
447 | continue; | |
448 | ||
449 | return macvlan_mode[i].name; | |
450 | } | |
451 | ||
452 | return NULL; | |
453 | } | |
f9373e40 CB |
454 | |
455 | int set_config_string_item(char **conf_item, const char *value) | |
456 | { | |
457 | char *new_value; | |
458 | ||
459 | if (lxc_config_value_empty(value)) { | |
460 | free(*conf_item); | |
461 | *conf_item = NULL; | |
462 | return 0; | |
463 | } | |
464 | ||
465 | new_value = strdup(value); | |
466 | if (!new_value) { | |
467 | SYSERROR("failed to duplicate string \"%s\"", value); | |
468 | return -1; | |
469 | } | |
470 | ||
471 | free(*conf_item); | |
472 | *conf_item = new_value; | |
473 | return 0; | |
474 | } | |
475 | ||
476 | int set_config_string_item_max(char **conf_item, const char *value, size_t max) | |
477 | { | |
478 | if (strlen(value) >= max) { | |
479 | ERROR("%s is too long (>= %lu)", value, (unsigned long)max); | |
480 | return -1; | |
481 | } | |
482 | ||
483 | return set_config_string_item(conf_item, value); | |
484 | } | |
485 | ||
486 | int set_config_path_item(char **conf_item, const char *value) | |
487 | { | |
488 | return set_config_string_item_max(conf_item, value, PATH_MAX); | |
489 | } | |
490 | ||
491 | int config_ip_prefix(struct in_addr *addr) | |
492 | { | |
493 | if (IN_CLASSA(addr->s_addr)) | |
494 | return 32 - IN_CLASSA_NSHIFT; | |
495 | if (IN_CLASSB(addr->s_addr)) | |
496 | return 32 - IN_CLASSB_NSHIFT; | |
497 | if (IN_CLASSC(addr->s_addr)) | |
498 | return 32 - IN_CLASSC_NSHIFT; | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
de4855a8 | 503 | int network_ifname(char *valuep, const char *value) |
f9373e40 | 504 | { |
de4855a8 CB |
505 | if (strlen(value) >= IFNAMSIZ) { |
506 | ERROR("Network devie name \"%s\" is too long (>= %zu)", value, | |
507 | (size_t)IFNAMSIZ); | |
508 | } | |
509 | ||
510 | strcpy(valuep, value); | |
511 | return 0; | |
f9373e40 CB |
512 | } |
513 | ||
514 | int rand_complete_hwaddr(char *hwaddr) | |
515 | { | |
516 | const char hex[] = "0123456789abcdef"; | |
517 | char *curs = hwaddr; | |
518 | ||
519 | #ifndef HAVE_RAND_R | |
520 | randseed(true); | |
521 | #else | |
522 | unsigned int seed; | |
523 | ||
524 | seed = randseed(false); | |
525 | #endif | |
526 | while (*curs != '\0' && *curs != '\n') { | |
527 | if (*curs == 'x' || *curs == 'X') { | |
528 | if (curs - hwaddr == 1) { | |
529 | /* ensure address is unicast */ | |
530 | #ifdef HAVE_RAND_R | |
531 | *curs = hex[rand_r(&seed) & 0x0E]; | |
532 | } else { | |
533 | *curs = hex[rand_r(&seed) & 0x0F]; | |
534 | #else | |
535 | *curs = hex[rand() & 0x0E]; | |
536 | } else { | |
537 | *curs = hex[rand() & 0x0F]; | |
538 | #endif | |
539 | } | |
540 | } | |
541 | curs++; | |
542 | } | |
543 | return 0; | |
544 | } | |
545 | ||
ce4be612 | 546 | bool lxc_config_net_hwaddr(const char *line) |
547 | { | |
44047b2b FA |
548 | unsigned index; |
549 | char tmp[7]; | |
ce4be612 | 550 | |
551 | if (strncmp(line, "lxc.net", 7) != 0) | |
552 | return false; | |
44047b2b | 553 | if (strncmp(line, "lxc.net.hwaddr", 14) == 0) |
ce4be612 | 554 | return true; |
44047b2b | 555 | if (strncmp(line, "lxc.network.hwaddr", 18) == 0) |
ce4be612 | 556 | return true; |
44047b2b FA |
557 | if (sscanf(line, "lxc.net.%u.%6s", &index, tmp) == 2 || sscanf(line, "lxc.network.%u.%6s", &index, tmp) == 2) |
558 | return strncmp(tmp, "hwaddr", 6) == 0; | |
ce4be612 | 559 | |
ce4be612 | 560 | return false; |
561 | } | |
562 | ||
f9373e40 | 563 | /* |
ae1dc8b4 | 564 | * If we find a lxc.net.[i].hwaddr or lxc.network.hwaddr in the original config |
565 | * file, we expand it in the unexpanded_config, so that after a save_config we | |
566 | * store the hwaddr for re-use. | |
f9373e40 CB |
567 | * This is only called when reading the config file, not when executing a |
568 | * lxc.include. | |
569 | * 'x' and 'X' are substituted in-place. | |
570 | */ | |
571 | void update_hwaddr(const char *line) | |
572 | { | |
573 | char *p; | |
574 | ||
575 | line += lxc_char_left_gc(line, strlen(line)); | |
576 | if (line[0] == '#') | |
577 | return; | |
578 | ||
ae1dc8b4 | 579 | if (!lxc_config_net_hwaddr(line)) |
f9373e40 CB |
580 | return; |
581 | ||
582 | /* Let config_net_hwaddr raise the error. */ | |
583 | p = strchr(line, '='); | |
584 | if (!p) | |
585 | return; | |
586 | p++; | |
587 | ||
588 | while (isblank(*p)) | |
589 | p++; | |
590 | ||
591 | if (!*p) | |
592 | return; | |
593 | ||
594 | rand_complete_hwaddr(p); | |
595 | } | |
596 | ||
597 | bool new_hwaddr(char *hwaddr) | |
598 | { | |
599 | int ret; | |
600 | ||
601 | (void)randseed(true); | |
602 | ||
603 | ret = snprintf(hwaddr, 18, "00:16:3e:%02x:%02x:%02x", rand() % 255, | |
604 | rand() % 255, rand() % 255); | |
605 | if (ret < 0 || ret >= 18) { | |
606 | SYSERROR("Failed to call snprintf()."); | |
607 | return false; | |
608 | } | |
609 | ||
610 | return true; | |
611 | } | |
953fe44f CB |
612 | |
613 | int lxc_get_conf_str(char *retv, int inlen, const char *value) | |
614 | { | |
615 | if (!value) | |
616 | return 0; | |
617 | if (retv && inlen >= strlen(value) + 1) | |
618 | strncpy(retv, value, strlen(value) + 1); | |
619 | ||
620 | return strlen(value); | |
621 | } | |
622 | ||
623 | int lxc_get_conf_int(struct lxc_conf *c, char *retv, int inlen, int v) | |
624 | { | |
625 | if (!retv) | |
626 | inlen = 0; | |
627 | else | |
628 | memset(retv, 0, inlen); | |
629 | ||
630 | return snprintf(retv, inlen, "%d", v); | |
631 | } | |
240d4b74 | 632 | |
2ea479c9 CB |
633 | int lxc_get_conf_uint64(struct lxc_conf *c, char *retv, int inlen, uint64_t v) |
634 | { | |
635 | if (!retv) | |
636 | inlen = 0; | |
637 | else | |
638 | memset(retv, 0, inlen); | |
639 | ||
640 | return snprintf(retv, inlen, "%"PRIu64, v); | |
641 | } | |
642 | ||
71460831 | 643 | bool parse_limit_value(const char **value, rlim_t *res) |
240d4b74 | 644 | { |
645 | char *endptr = NULL; | |
646 | ||
647 | if (strncmp(*value, "unlimited", sizeof("unlimited") - 1) == 0) { | |
648 | *res = RLIM_INFINITY; | |
649 | *value += sizeof("unlimited") - 1; | |
650 | return true; | |
651 | } | |
652 | ||
653 | errno = 0; | |
71460831 | 654 | *res = strtoull(*value, &endptr, 10); |
240d4b74 | 655 | if (errno || !endptr) |
656 | return false; | |
657 | *value = endptr; | |
658 | ||
659 | return true; | |
660 | } | |
28d9e29e CB |
661 | |
662 | static int lxc_container_name_to_pid(const char *lxcname_or_pid, | |
663 | const char *lxcpath) | |
664 | { | |
665 | int ret; | |
666 | signed long int pid; | |
667 | char *err = NULL; | |
668 | ||
669 | pid = strtol(lxcname_or_pid, &err, 10); | |
670 | if (*err != '\0' || pid < 1) { | |
671 | struct lxc_container *c; | |
672 | ||
673 | c = lxc_container_new(lxcname_or_pid, lxcpath); | |
674 | if (!c) { | |
675 | ERROR("\"%s\" is not a valid pid nor a container name", | |
676 | lxcname_or_pid); | |
677 | return -1; | |
678 | } | |
679 | ||
680 | if (!c->may_control(c)) { | |
681 | ERROR("Insufficient privileges to control container " | |
682 | "\"%s\"", c->name); | |
683 | lxc_container_put(c); | |
684 | return -1; | |
685 | } | |
686 | ||
687 | pid = c->init_pid(c); | |
688 | if (pid < 1) { | |
689 | ERROR("Container \"%s\" is not running", c->name); | |
690 | lxc_container_put(c); | |
691 | return -1; | |
692 | } | |
693 | ||
694 | lxc_container_put(c); | |
695 | } | |
696 | ||
697 | ret = kill(pid, 0); | |
698 | if (ret < 0) { | |
699 | ERROR("%s - Failed to send signal to pid %d", strerror(errno), | |
700 | (int)pid); | |
701 | return -EPERM; | |
702 | } | |
703 | ||
704 | return pid; | |
705 | } | |
706 | ||
707 | int lxc_inherit_namespace(const char *lxcname_or_pid, const char *lxcpath, | |
708 | const char *namespace) | |
709 | { | |
710 | int fd, pid; | |
711 | char *dup, *lastslash; | |
712 | ||
713 | lastslash = strrchr(lxcname_or_pid, '/'); | |
714 | if (lastslash) { | |
715 | dup = strdup(lxcname_or_pid); | |
716 | if (!dup) | |
717 | return -ENOMEM; | |
718 | ||
71649566 L |
719 | dup[lastslash - lxcname_or_pid] = '\0'; |
720 | pid = lxc_container_name_to_pid(lastslash + 1, dup); | |
28d9e29e CB |
721 | free(dup); |
722 | } else { | |
723 | pid = lxc_container_name_to_pid(lxcname_or_pid, lxcpath); | |
724 | } | |
725 | ||
726 | if (pid < 0) | |
727 | return -EINVAL; | |
728 | ||
729 | fd = lxc_preserve_ns(pid, namespace); | |
730 | if (fd < 0) | |
731 | return -EINVAL; | |
732 | ||
733 | return fd; | |
734 | } |