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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 | ||
18cd4b54 DJ |
39 | #ifndef HAVE_STRLCPY |
40 | #include "include/strlcpy.h" | |
41 | #endif | |
42 | ||
ac2cecc4 | 43 | lxc_log_define(confile_utils, lxc); |
ce2f5ae8 | 44 | |
0b843d35 CB |
45 | int parse_idmaps(const char *idmap, char *type, unsigned long *nsid, |
46 | unsigned long *hostid, unsigned long *range) | |
47 | { | |
48 | int ret = -1; | |
49 | unsigned long tmp_hostid, tmp_nsid, tmp_range; | |
50 | char tmp_type; | |
51 | char *window, *slide; | |
52 | char *dup = NULL; | |
53 | ||
54 | /* Duplicate string. */ | |
55 | dup = strdup(idmap); | |
56 | if (!dup) | |
57 | goto on_error; | |
58 | ||
59 | /* A prototypical idmap entry would be: "u 1000 1000000 65536" */ | |
60 | ||
61 | /* align */ | |
62 | slide = window = dup; | |
63 | /* skip whitespace */ | |
64 | slide += strspn(slide, " \t\r"); | |
65 | if (slide != window && *slide == '\0') | |
66 | goto on_error; | |
67 | ||
68 | /* Validate type. */ | |
a8b1ac78 | 69 | if (*slide != 'u' && *slide != 'g') { |
f37d1c22 | 70 | ERROR("Invalid id mapping type: %c", *slide); |
0b843d35 | 71 | goto on_error; |
a8b1ac78 TA |
72 | } |
73 | ||
0b843d35 CB |
74 | /* Assign type. */ |
75 | tmp_type = *slide; | |
76 | ||
77 | /* move beyond type */ | |
78 | slide++; | |
79 | /* align */ | |
80 | window = slide; | |
81 | /* Validate that only whitespace follows. */ | |
82 | slide += strspn(slide, " \t\r"); | |
83 | /* There must be whitespace. */ | |
84 | if (slide == window) | |
85 | goto on_error; | |
86 | ||
f37d1c22 | 87 | /* Mark beginning of nsid. */ |
0b843d35 CB |
88 | window = slide; |
89 | /* Validate that non-whitespace follows. */ | |
90 | slide += strcspn(slide, " \t\r"); | |
91 | /* There must be non-whitespace. */ | |
92 | if (slide == window || *slide == '\0') | |
93 | goto on_error; | |
f37d1c22 | 94 | /* Mark end of nsid. */ |
0b843d35 CB |
95 | *slide = '\0'; |
96 | ||
f37d1c22 | 97 | /* Parse nsid. */ |
a8b1ac78 | 98 | if (lxc_safe_ulong(window, &tmp_nsid) < 0) { |
f37d1c22 | 99 | ERROR("Failed to parse nsid: %s", window); |
0b843d35 | 100 | goto on_error; |
a8b1ac78 | 101 | } |
0b843d35 CB |
102 | |
103 | /* Move beyond \0. */ | |
104 | slide++; | |
0b843d35 CB |
105 | /* Validate that only whitespace follows. */ |
106 | slide += strspn(slide, " \t\r"); | |
107 | /* If there was only one whitespace then we whiped it with our \0 above. | |
108 | * So only ensure that we're not at the end of the string. | |
109 | */ | |
110 | if (*slide == '\0') | |
111 | goto on_error; | |
112 | ||
113 | /* Mark beginning of hostid. */ | |
114 | window = slide; | |
115 | /* Validate that non-whitespace follows. */ | |
116 | slide += strcspn(slide, " \t\r"); | |
117 | /* There must be non-whitespace. */ | |
118 | if (slide == window || *slide == '\0') | |
119 | goto on_error; | |
f37d1c22 | 120 | /* Mark end of nsid. */ |
0b843d35 CB |
121 | *slide = '\0'; |
122 | ||
123 | /* Parse hostid. */ | |
a8b1ac78 | 124 | if (lxc_safe_ulong(window, &tmp_hostid) < 0) { |
f37d1c22 | 125 | ERROR("Failed to parse hostid: %s", window); |
0b843d35 | 126 | goto on_error; |
a8b1ac78 | 127 | } |
0b843d35 CB |
128 | |
129 | /* Move beyond \0. */ | |
130 | slide++; | |
0b843d35 CB |
131 | /* Validate that only whitespace follows. */ |
132 | slide += strspn(slide, " \t\r"); | |
133 | /* If there was only one whitespace then we whiped it with our \0 above. | |
134 | * So only ensure that we're not at the end of the string. | |
135 | */ | |
136 | if (*slide == '\0') | |
137 | goto on_error; | |
138 | ||
139 | /* Mark beginning of range. */ | |
140 | window = slide; | |
141 | /* Validate that non-whitespace follows. */ | |
142 | slide += strcspn(slide, " \t\r"); | |
143 | /* There must be non-whitespace. */ | |
144 | if (slide == window) | |
145 | goto on_error; | |
146 | ||
147 | /* The range is the last valid entry we expect. So make sure that there | |
f37d1c22 | 148 | * is no trailing garbage and if there is, error out. |
0b843d35 CB |
149 | */ |
150 | if (*(slide + strspn(slide, " \t\r\n")) != '\0') | |
151 | goto on_error; | |
29c98ddd | 152 | |
0b843d35 CB |
153 | /* Mark end of range. */ |
154 | *slide = '\0'; | |
155 | ||
156 | /* Parse range. */ | |
a8b1ac78 | 157 | if (lxc_safe_ulong(window, &tmp_range) < 0) { |
f37d1c22 | 158 | ERROR("Failed to parse id mapping range: %s", window); |
0b843d35 | 159 | goto on_error; |
a8b1ac78 | 160 | } |
0b843d35 CB |
161 | |
162 | *type = tmp_type; | |
163 | *nsid = tmp_nsid; | |
164 | *hostid = tmp_hostid; | |
165 | *range = tmp_range; | |
166 | ||
167 | /* Yay, we survived. */ | |
168 | ret = 0; | |
169 | ||
170 | on_error: | |
171 | free(dup); | |
172 | ||
173 | return ret; | |
174 | } | |
663e9916 CB |
175 | |
176 | bool lxc_config_value_empty(const char *value) | |
177 | { | |
178 | if (value && strlen(value) > 0) | |
179 | return false; | |
180 | ||
181 | return true; | |
182 | } | |
ce2f5ae8 | 183 | |
c302b476 | 184 | struct lxc_netdev *lxc_network_add(struct lxc_list *networks, int idx, bool tail) |
ce2f5ae8 CB |
185 | { |
186 | struct lxc_list *newlist; | |
187 | struct lxc_netdev *netdev = NULL; | |
ce2f5ae8 CB |
188 | |
189 | /* network does not exist */ | |
190 | netdev = malloc(sizeof(*netdev)); | |
191 | if (!netdev) | |
192 | return NULL; | |
193 | ||
194 | memset(netdev, 0, sizeof(*netdev)); | |
195 | lxc_list_init(&netdev->ipv4); | |
196 | lxc_list_init(&netdev->ipv6); | |
197 | ||
198 | /* give network a unique index */ | |
199 | netdev->idx = idx; | |
200 | ||
201 | /* prepare new list */ | |
202 | newlist = malloc(sizeof(*newlist)); | |
203 | if (!newlist) { | |
204 | free(netdev); | |
205 | return NULL; | |
206 | } | |
207 | ||
208 | lxc_list_init(newlist); | |
209 | newlist->elem = netdev; | |
210 | ||
c302b476 CB |
211 | if (tail) |
212 | lxc_list_add_tail(networks, newlist); | |
213 | else | |
214 | lxc_list_add(networks, newlist); | |
29c98ddd | 215 | |
ce2f5ae8 CB |
216 | return netdev; |
217 | } | |
1ed6ba91 | 218 | |
c302b476 CB |
219 | /* Takes care of finding the correct netdev struct in the networks list or |
220 | * allocates a new one if it couldn't be found. | |
221 | */ | |
222 | struct lxc_netdev *lxc_get_netdev_by_idx(struct lxc_conf *conf, | |
223 | unsigned int idx, bool allocate) | |
224 | { | |
225 | struct lxc_netdev *netdev = NULL; | |
226 | struct lxc_list *networks = &conf->network; | |
227 | struct lxc_list *insert = networks; | |
228 | ||
229 | /* lookup network */ | |
230 | if (!lxc_list_empty(networks)) { | |
231 | lxc_list_for_each(insert, networks) { | |
232 | netdev = insert->elem; | |
233 | if (netdev->idx == idx) | |
234 | return netdev; | |
235 | else if (netdev->idx > idx) | |
236 | break; | |
237 | } | |
238 | } | |
239 | ||
240 | if (!allocate) | |
241 | return NULL; | |
242 | ||
243 | return lxc_network_add(insert, idx, true); | |
244 | } | |
245 | ||
1ed6ba91 CB |
246 | void lxc_log_configured_netdevs(const struct lxc_conf *conf) |
247 | { | |
248 | struct lxc_netdev *netdev; | |
249 | struct lxc_list *it = (struct lxc_list *)&conf->network;; | |
250 | ||
251 | if ((conf->loglevel != LXC_LOG_LEVEL_TRACE) && | |
252 | (lxc_log_get_level() != LXC_LOG_LEVEL_TRACE)) | |
253 | return; | |
254 | ||
255 | if (lxc_list_empty(it)) { | |
256 | TRACE("container has no networks configured"); | |
257 | return; | |
258 | } | |
259 | ||
260 | lxc_list_for_each(it, &conf->network) { | |
9b0df30f CB |
261 | struct lxc_list *cur, *next; |
262 | struct lxc_inetdev *inet4dev; | |
263 | struct lxc_inet6dev *inet6dev; | |
264 | char bufinet4[INET_ADDRSTRLEN], bufinet6[INET6_ADDRSTRLEN]; | |
265 | ||
1ed6ba91 CB |
266 | netdev = it->elem; |
267 | ||
c302b476 | 268 | TRACE("index: %zd", netdev->idx); |
7a582518 | 269 | TRACE("ifindex: %d", netdev->ifindex); |
29c98ddd | 270 | |
1ed6ba91 CB |
271 | switch (netdev->type) { |
272 | case LXC_NET_VETH: | |
273 | TRACE("type: veth"); | |
29c98ddd | 274 | |
de4855a8 | 275 | if (netdev->priv.veth_attr.pair[0] != '\0') |
9b0df30f CB |
276 | TRACE("veth pair: %s", |
277 | netdev->priv.veth_attr.pair); | |
29c98ddd | 278 | |
8ce727fc CB |
279 | if (netdev->priv.veth_attr.veth1[0] != '\0') |
280 | TRACE("veth1 : %s", | |
281 | netdev->priv.veth_attr.veth1); | |
29c98ddd | 282 | |
d952b351 CB |
283 | if (netdev->priv.veth_attr.ifindex > 0) |
284 | TRACE("host side ifindex for veth device: %d", | |
285 | netdev->priv.veth_attr.ifindex); | |
1ed6ba91 CB |
286 | break; |
287 | case LXC_NET_MACVLAN: | |
288 | TRACE("type: macvlan"); | |
29c98ddd | 289 | |
9b0df30f CB |
290 | if (netdev->priv.macvlan_attr.mode > 0) { |
291 | char *macvlan_mode; | |
29c98ddd | 292 | |
9b0df30f CB |
293 | macvlan_mode = lxc_macvlan_flag_to_mode( |
294 | netdev->priv.macvlan_attr.mode); | |
295 | TRACE("macvlan mode: %s", | |
296 | macvlan_mode ? macvlan_mode | |
297 | : "(invalid mode)"); | |
298 | } | |
1ed6ba91 CB |
299 | break; |
300 | case LXC_NET_VLAN: | |
301 | TRACE("type: vlan"); | |
9b0df30f | 302 | TRACE("vlan id: %d", netdev->priv.vlan_attr.vid); |
1ed6ba91 CB |
303 | break; |
304 | case LXC_NET_PHYS: | |
305 | TRACE("type: phys"); | |
29c98ddd | 306 | |
307 | if (netdev->priv.phys_attr.ifindex > 0) | |
b809f232 CB |
308 | TRACE("host side ifindex for phys device: %d", |
309 | netdev->priv.phys_attr.ifindex); | |
1ed6ba91 CB |
310 | break; |
311 | case LXC_NET_EMPTY: | |
312 | TRACE("type: empty"); | |
313 | break; | |
314 | case LXC_NET_NONE: | |
315 | TRACE("type: none"); | |
316 | break; | |
317 | default: | |
318 | ERROR("invalid network type %d", netdev->type); | |
319 | return; | |
320 | } | |
321 | ||
9b0df30f CB |
322 | if (netdev->type != LXC_NET_EMPTY) { |
323 | TRACE("flags: %s", | |
324 | netdev->flags == IFF_UP ? "up" : "none"); | |
29c98ddd | 325 | |
de4855a8 | 326 | if (netdev->link[0] != '\0') |
9b0df30f | 327 | TRACE("link: %s", netdev->link); |
29c98ddd | 328 | |
de4855a8 | 329 | if (netdev->name[0] != '\0') |
9b0df30f | 330 | TRACE("name: %s", netdev->name); |
29c98ddd | 331 | |
9b0df30f CB |
332 | if (netdev->hwaddr) |
333 | TRACE("hwaddr: %s", netdev->hwaddr); | |
29c98ddd | 334 | |
9b0df30f CB |
335 | if (netdev->mtu) |
336 | TRACE("mtu: %s", netdev->mtu); | |
29c98ddd | 337 | |
9b0df30f CB |
338 | if (netdev->upscript) |
339 | TRACE("upscript: %s", netdev->upscript); | |
29c98ddd | 340 | |
9b0df30f CB |
341 | if (netdev->downscript) |
342 | TRACE("downscript: %s", netdev->downscript); | |
343 | ||
344 | TRACE("ipv4 gateway auto: %s", | |
345 | netdev->ipv4_gateway_auto ? "true" : "false"); | |
346 | ||
347 | if (netdev->ipv4_gateway) { | |
348 | inet_ntop(AF_INET, netdev->ipv4_gateway, | |
349 | bufinet4, sizeof(bufinet4)); | |
350 | TRACE("ipv4 gateway: %s", bufinet4); | |
351 | } | |
352 | ||
353 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { | |
354 | inet4dev = cur->elem; | |
355 | inet_ntop(AF_INET, &inet4dev->addr, bufinet4, | |
356 | sizeof(bufinet4)); | |
357 | TRACE("ipv4 addr: %s", bufinet4); | |
358 | } | |
359 | ||
360 | TRACE("ipv6 gateway auto: %s", | |
361 | netdev->ipv6_gateway_auto ? "true" : "false"); | |
29c98ddd | 362 | |
9b0df30f CB |
363 | if (netdev->ipv6_gateway) { |
364 | inet_ntop(AF_INET6, netdev->ipv6_gateway, | |
365 | bufinet6, sizeof(bufinet6)); | |
366 | TRACE("ipv6 gateway: %s", bufinet6); | |
367 | } | |
29c98ddd | 368 | |
9b0df30f CB |
369 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { |
370 | inet6dev = cur->elem; | |
371 | inet_ntop(AF_INET6, &inet6dev->addr, bufinet6, | |
372 | sizeof(bufinet6)); | |
373 | TRACE("ipv6 addr: %s", bufinet6); | |
374 | } | |
375 | } | |
1ed6ba91 CB |
376 | } |
377 | } | |
519df1c1 | 378 | |
e5d2fd7c CB |
379 | static void lxc_free_netdev(struct lxc_netdev *netdev) |
380 | { | |
381 | struct lxc_list *cur, *next; | |
382 | ||
e5d2fd7c CB |
383 | free(netdev->upscript); |
384 | free(netdev->downscript); | |
385 | free(netdev->hwaddr); | |
386 | free(netdev->mtu); | |
387 | ||
388 | free(netdev->ipv4_gateway); | |
389 | lxc_list_for_each_safe(cur, &netdev->ipv4, next) { | |
390 | lxc_list_del(cur); | |
391 | free(cur->elem); | |
392 | free(cur); | |
393 | } | |
394 | ||
395 | free(netdev->ipv6_gateway); | |
396 | lxc_list_for_each_safe(cur, &netdev->ipv6, next) { | |
397 | lxc_list_del(cur); | |
398 | free(cur->elem); | |
399 | free(cur); | |
400 | } | |
401 | ||
402 | free(netdev); | |
403 | } | |
404 | ||
519df1c1 CB |
405 | bool lxc_remove_nic_by_idx(struct lxc_conf *conf, unsigned int idx) |
406 | { | |
e5d2fd7c | 407 | struct lxc_list *cur, *next; |
519df1c1 CB |
408 | struct lxc_netdev *netdev; |
409 | bool found = false; | |
410 | ||
411 | lxc_list_for_each_safe(cur, &conf->network, next) { | |
412 | netdev = cur->elem; | |
413 | if (netdev->idx != idx) | |
414 | continue; | |
415 | ||
416 | lxc_list_del(cur); | |
417 | found = true; | |
418 | break; | |
419 | } | |
420 | ||
421 | if (!found) | |
422 | return false; | |
423 | ||
e5d2fd7c | 424 | lxc_free_netdev(netdev); |
519df1c1 CB |
425 | free(cur); |
426 | ||
427 | return true; | |
428 | } | |
e5d2fd7c | 429 | |
c302b476 | 430 | void lxc_free_networks(struct lxc_list *networks) |
e5d2fd7c CB |
431 | { |
432 | struct lxc_list *cur, *next; | |
433 | struct lxc_netdev *netdev; | |
434 | ||
c302b476 | 435 | lxc_list_for_each_safe(cur, networks, next) { |
e5d2fd7c CB |
436 | netdev = cur->elem; |
437 | lxc_free_netdev(netdev); | |
438 | free(cur); | |
439 | } | |
440 | ||
441 | /* prevent segfaults */ | |
c302b476 | 442 | lxc_list_init(networks); |
e5d2fd7c | 443 | } |
9b0df30f CB |
444 | |
445 | static struct macvlan_mode { | |
446 | char *name; | |
447 | int mode; | |
448 | } macvlan_mode[] = { | |
449 | { "private", MACVLAN_MODE_PRIVATE }, | |
450 | { "vepa", MACVLAN_MODE_VEPA }, | |
451 | { "bridge", MACVLAN_MODE_BRIDGE }, | |
452 | { "passthru", MACVLAN_MODE_PASSTHRU }, | |
453 | }; | |
454 | ||
455 | int lxc_macvlan_mode_to_flag(int *mode, const char *value) | |
456 | { | |
457 | size_t i; | |
458 | ||
459 | for (i = 0; i < sizeof(macvlan_mode) / sizeof(macvlan_mode[0]); i++) { | |
460 | if (strcmp(macvlan_mode[i].name, value)) | |
461 | continue; | |
462 | ||
463 | *mode = macvlan_mode[i].mode; | |
464 | return 0; | |
465 | } | |
466 | ||
467 | return -1; | |
468 | } | |
469 | ||
470 | char *lxc_macvlan_flag_to_mode(int mode) | |
471 | { | |
472 | size_t i; | |
473 | ||
474 | for (i = 0; i < sizeof(macvlan_mode) / sizeof(macvlan_mode[0]); i++) { | |
475 | if (macvlan_mode[i].mode == mode) | |
476 | continue; | |
477 | ||
478 | return macvlan_mode[i].name; | |
479 | } | |
480 | ||
481 | return NULL; | |
482 | } | |
f9373e40 CB |
483 | |
484 | int set_config_string_item(char **conf_item, const char *value) | |
485 | { | |
486 | char *new_value; | |
487 | ||
488 | if (lxc_config_value_empty(value)) { | |
489 | free(*conf_item); | |
490 | *conf_item = NULL; | |
491 | return 0; | |
492 | } | |
493 | ||
494 | new_value = strdup(value); | |
495 | if (!new_value) { | |
29c98ddd | 496 | SYSERROR("Failed to duplicate string \"%s\"", value); |
f9373e40 CB |
497 | return -1; |
498 | } | |
499 | ||
500 | free(*conf_item); | |
501 | *conf_item = new_value; | |
502 | return 0; | |
503 | } | |
504 | ||
505 | int set_config_string_item_max(char **conf_item, const char *value, size_t max) | |
506 | { | |
507 | if (strlen(value) >= max) { | |
508 | ERROR("%s is too long (>= %lu)", value, (unsigned long)max); | |
509 | return -1; | |
510 | } | |
511 | ||
512 | return set_config_string_item(conf_item, value); | |
513 | } | |
514 | ||
515 | int set_config_path_item(char **conf_item, const char *value) | |
516 | { | |
517 | return set_config_string_item_max(conf_item, value, PATH_MAX); | |
518 | } | |
519 | ||
520 | int config_ip_prefix(struct in_addr *addr) | |
521 | { | |
522 | if (IN_CLASSA(addr->s_addr)) | |
523 | return 32 - IN_CLASSA_NSHIFT; | |
29c98ddd | 524 | |
f9373e40 CB |
525 | if (IN_CLASSB(addr->s_addr)) |
526 | return 32 - IN_CLASSB_NSHIFT; | |
29c98ddd | 527 | |
f9373e40 CB |
528 | if (IN_CLASSC(addr->s_addr)) |
529 | return 32 - IN_CLASSC_NSHIFT; | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
18cd4b54 | 534 | int network_ifname(char *valuep, const char *value, size_t size) |
f9373e40 | 535 | { |
18cd4b54 DJ |
536 | size_t retlen; |
537 | ||
538 | if (!valuep || !value) | |
539 | return -1; | |
540 | ||
541 | retlen = strlcpy(valuep, value, size); | |
29c98ddd | 542 | if (retlen >= size) |
de4855a8 | 543 | ERROR("Network devie name \"%s\" is too long (>= %zu)", value, |
18cd4b54 | 544 | size); |
de4855a8 | 545 | |
de4855a8 | 546 | return 0; |
f9373e40 CB |
547 | } |
548 | ||
29c98ddd | 549 | void rand_complete_hwaddr(char *hwaddr) |
f9373e40 CB |
550 | { |
551 | const char hex[] = "0123456789abcdef"; | |
552 | char *curs = hwaddr; | |
553 | ||
554 | #ifndef HAVE_RAND_R | |
555 | randseed(true); | |
556 | #else | |
557 | unsigned int seed; | |
558 | ||
559 | seed = randseed(false); | |
560 | #endif | |
561 | while (*curs != '\0' && *curs != '\n') { | |
562 | if (*curs == 'x' || *curs == 'X') { | |
563 | if (curs - hwaddr == 1) { | |
564 | /* ensure address is unicast */ | |
565 | #ifdef HAVE_RAND_R | |
566 | *curs = hex[rand_r(&seed) & 0x0E]; | |
567 | } else { | |
568 | *curs = hex[rand_r(&seed) & 0x0F]; | |
569 | #else | |
570 | *curs = hex[rand() & 0x0E]; | |
571 | } else { | |
572 | *curs = hex[rand() & 0x0F]; | |
573 | #endif | |
574 | } | |
575 | } | |
576 | curs++; | |
577 | } | |
f9373e40 CB |
578 | } |
579 | ||
ce4be612 | 580 | bool lxc_config_net_hwaddr(const char *line) |
581 | { | |
44047b2b FA |
582 | unsigned index; |
583 | char tmp[7]; | |
ce4be612 | 584 | |
585 | if (strncmp(line, "lxc.net", 7) != 0) | |
586 | return false; | |
29c98ddd | 587 | |
44047b2b | 588 | if (strncmp(line, "lxc.net.hwaddr", 14) == 0) |
ce4be612 | 589 | return true; |
29c98ddd | 590 | |
44047b2b | 591 | if (strncmp(line, "lxc.network.hwaddr", 18) == 0) |
ce4be612 | 592 | return true; |
29c98ddd | 593 | |
594 | if (sscanf(line, "lxc.net.%u.%6s", &index, tmp) == 2 || | |
595 | sscanf(line, "lxc.network.%u.%6s", &index, tmp) == 2) | |
44047b2b | 596 | return strncmp(tmp, "hwaddr", 6) == 0; |
ce4be612 | 597 | |
ce4be612 | 598 | return false; |
599 | } | |
600 | ||
f9373e40 | 601 | /* |
ae1dc8b4 | 602 | * If we find a lxc.net.[i].hwaddr or lxc.network.hwaddr in the original config |
603 | * file, we expand it in the unexpanded_config, so that after a save_config we | |
604 | * store the hwaddr for re-use. | |
f9373e40 CB |
605 | * This is only called when reading the config file, not when executing a |
606 | * lxc.include. | |
607 | * 'x' and 'X' are substituted in-place. | |
608 | */ | |
609 | void update_hwaddr(const char *line) | |
610 | { | |
611 | char *p; | |
612 | ||
613 | line += lxc_char_left_gc(line, strlen(line)); | |
614 | if (line[0] == '#') | |
615 | return; | |
616 | ||
ae1dc8b4 | 617 | if (!lxc_config_net_hwaddr(line)) |
f9373e40 CB |
618 | return; |
619 | ||
620 | /* Let config_net_hwaddr raise the error. */ | |
621 | p = strchr(line, '='); | |
622 | if (!p) | |
623 | return; | |
624 | p++; | |
625 | ||
626 | while (isblank(*p)) | |
627 | p++; | |
628 | ||
629 | if (!*p) | |
630 | return; | |
631 | ||
632 | rand_complete_hwaddr(p); | |
633 | } | |
634 | ||
635 | bool new_hwaddr(char *hwaddr) | |
636 | { | |
637 | int ret; | |
638 | ||
639 | (void)randseed(true); | |
640 | ||
641 | ret = snprintf(hwaddr, 18, "00:16:3e:%02x:%02x:%02x", rand() % 255, | |
642 | rand() % 255, rand() % 255); | |
643 | if (ret < 0 || ret >= 18) { | |
644 | SYSERROR("Failed to call snprintf()."); | |
645 | return false; | |
646 | } | |
647 | ||
648 | return true; | |
649 | } | |
953fe44f CB |
650 | |
651 | int lxc_get_conf_str(char *retv, int inlen, const char *value) | |
652 | { | |
d3bdf12c CB |
653 | size_t value_len; |
654 | ||
953fe44f CB |
655 | if (!value) |
656 | return 0; | |
d3bdf12c CB |
657 | |
658 | value_len = strlen(value); | |
659 | if (retv && inlen >= value_len + 1) | |
660 | memcpy(retv, value, value_len + 1); | |
953fe44f | 661 | |
29c98ddd | 662 | return value_len; |
953fe44f CB |
663 | } |
664 | ||
665 | int lxc_get_conf_int(struct lxc_conf *c, char *retv, int inlen, int v) | |
666 | { | |
1396b610 DJ |
667 | int len; |
668 | int fulllen = 0; | |
669 | ||
953fe44f CB |
670 | if (!retv) |
671 | inlen = 0; | |
672 | else | |
673 | memset(retv, 0, inlen); | |
674 | ||
1396b610 DJ |
675 | strprint(retv, inlen, "%d", v); |
676 | ||
677 | return fulllen; | |
953fe44f | 678 | } |
240d4b74 | 679 | |
885766f5 CB |
680 | int lxc_get_conf_size_t(struct lxc_conf *c, char *retv, int inlen, size_t v) |
681 | { | |
1396b610 DJ |
682 | int len; |
683 | int fulllen = 0; | |
684 | ||
885766f5 CB |
685 | if (!retv) |
686 | inlen = 0; | |
687 | else | |
688 | memset(retv, 0, inlen); | |
689 | ||
1396b610 DJ |
690 | strprint(retv, inlen, "%zu", v); |
691 | ||
692 | return fulllen; | |
885766f5 CB |
693 | } |
694 | ||
2ea479c9 CB |
695 | int lxc_get_conf_uint64(struct lxc_conf *c, char *retv, int inlen, uint64_t v) |
696 | { | |
1396b610 DJ |
697 | int len; |
698 | int fulllen = 0; | |
699 | ||
2ea479c9 CB |
700 | if (!retv) |
701 | inlen = 0; | |
702 | else | |
703 | memset(retv, 0, inlen); | |
704 | ||
1396b610 DJ |
705 | strprint(retv, inlen, "%"PRIu64, v); |
706 | ||
707 | return fulllen; | |
2ea479c9 CB |
708 | } |
709 | ||
71460831 | 710 | bool parse_limit_value(const char **value, rlim_t *res) |
240d4b74 | 711 | { |
712 | char *endptr = NULL; | |
713 | ||
714 | if (strncmp(*value, "unlimited", sizeof("unlimited") - 1) == 0) { | |
715 | *res = RLIM_INFINITY; | |
716 | *value += sizeof("unlimited") - 1; | |
717 | return true; | |
718 | } | |
719 | ||
720 | errno = 0; | |
71460831 | 721 | *res = strtoull(*value, &endptr, 10); |
240d4b74 | 722 | if (errno || !endptr) |
723 | return false; | |
29c98ddd | 724 | |
240d4b74 | 725 | *value = endptr; |
726 | ||
727 | return true; | |
728 | } | |
28d9e29e CB |
729 | |
730 | static int lxc_container_name_to_pid(const char *lxcname_or_pid, | |
731 | const char *lxcpath) | |
732 | { | |
733 | int ret; | |
734 | signed long int pid; | |
735 | char *err = NULL; | |
736 | ||
737 | pid = strtol(lxcname_or_pid, &err, 10); | |
738 | if (*err != '\0' || pid < 1) { | |
739 | struct lxc_container *c; | |
740 | ||
741 | c = lxc_container_new(lxcname_or_pid, lxcpath); | |
742 | if (!c) { | |
743 | ERROR("\"%s\" is not a valid pid nor a container name", | |
744 | lxcname_or_pid); | |
745 | return -1; | |
746 | } | |
747 | ||
748 | if (!c->may_control(c)) { | |
749 | ERROR("Insufficient privileges to control container " | |
750 | "\"%s\"", c->name); | |
751 | lxc_container_put(c); | |
752 | return -1; | |
753 | } | |
754 | ||
755 | pid = c->init_pid(c); | |
756 | if (pid < 1) { | |
757 | ERROR("Container \"%s\" is not running", c->name); | |
758 | lxc_container_put(c); | |
759 | return -1; | |
760 | } | |
761 | ||
762 | lxc_container_put(c); | |
763 | } | |
764 | ||
765 | ret = kill(pid, 0); | |
766 | if (ret < 0) { | |
6d1400b5 | 767 | SYSERROR("Failed to send signal to pid %d", (int)pid); |
29c98ddd | 768 | return -1; |
28d9e29e CB |
769 | } |
770 | ||
771 | return pid; | |
772 | } | |
773 | ||
774 | int lxc_inherit_namespace(const char *lxcname_or_pid, const char *lxcpath, | |
775 | const char *namespace) | |
776 | { | |
777 | int fd, pid; | |
778 | char *dup, *lastslash; | |
779 | ||
780 | lastslash = strrchr(lxcname_or_pid, '/'); | |
781 | if (lastslash) { | |
782 | dup = strdup(lxcname_or_pid); | |
783 | if (!dup) | |
29c98ddd | 784 | return -1; |
28d9e29e | 785 | |
71649566 L |
786 | dup[lastslash - lxcname_or_pid] = '\0'; |
787 | pid = lxc_container_name_to_pid(lastslash + 1, dup); | |
28d9e29e CB |
788 | free(dup); |
789 | } else { | |
790 | pid = lxc_container_name_to_pid(lxcname_or_pid, lxcpath); | |
791 | } | |
792 | ||
793 | if (pid < 0) | |
29c98ddd | 794 | return -1; |
28d9e29e CB |
795 | |
796 | fd = lxc_preserve_ns(pid, namespace); | |
797 | if (fd < 0) | |
29c98ddd | 798 | return -1; |
28d9e29e CB |
799 | |
800 | return fd; | |
801 | } | |
f6e32eb0 CB |
802 | |
803 | struct signame { | |
804 | int num; | |
805 | const char *name; | |
806 | }; | |
807 | ||
808 | static const struct signame signames[] = { | |
809 | { SIGHUP, "HUP" }, | |
810 | { SIGINT, "INT" }, | |
811 | { SIGQUIT, "QUIT" }, | |
812 | { SIGILL, "ILL" }, | |
813 | { SIGABRT, "ABRT" }, | |
814 | { SIGFPE, "FPE" }, | |
815 | { SIGKILL, "KILL" }, | |
816 | { SIGSEGV, "SEGV" }, | |
817 | { SIGPIPE, "PIPE" }, | |
818 | { SIGALRM, "ALRM" }, | |
819 | { SIGTERM, "TERM" }, | |
820 | { SIGUSR1, "USR1" }, | |
821 | { SIGUSR2, "USR2" }, | |
822 | { SIGCHLD, "CHLD" }, | |
823 | { SIGCONT, "CONT" }, | |
824 | { SIGSTOP, "STOP" }, | |
825 | { SIGTSTP, "TSTP" }, | |
826 | { SIGTTIN, "TTIN" }, | |
827 | { SIGTTOU, "TTOU" }, | |
828 | #ifdef SIGTRAP | |
829 | { SIGTRAP, "TRAP" }, | |
830 | #endif | |
831 | #ifdef SIGIOT | |
832 | { SIGIOT, "IOT" }, | |
833 | #endif | |
834 | #ifdef SIGEMT | |
835 | { SIGEMT, "EMT" }, | |
836 | #endif | |
837 | #ifdef SIGBUS | |
838 | { SIGBUS, "BUS" }, | |
839 | #endif | |
840 | #ifdef SIGSTKFLT | |
841 | { SIGSTKFLT, "STKFLT" }, | |
842 | #endif | |
843 | #ifdef SIGCLD | |
844 | { SIGCLD, "CLD" }, | |
845 | #endif | |
846 | #ifdef SIGURG | |
847 | { SIGURG, "URG" }, | |
848 | #endif | |
849 | #ifdef SIGXCPU | |
850 | { SIGXCPU, "XCPU" }, | |
851 | #endif | |
852 | #ifdef SIGXFSZ | |
853 | { SIGXFSZ, "XFSZ" }, | |
854 | #endif | |
855 | #ifdef SIGVTALRM | |
856 | { SIGVTALRM, "VTALRM" }, | |
857 | #endif | |
858 | #ifdef SIGPROF | |
859 | { SIGPROF, "PROF" }, | |
860 | #endif | |
861 | #ifdef SIGWINCH | |
862 | { SIGWINCH, "WINCH" }, | |
863 | #endif | |
864 | #ifdef SIGIO | |
865 | { SIGIO, "IO" }, | |
866 | #endif | |
867 | #ifdef SIGPOLL | |
868 | { SIGPOLL, "POLL" }, | |
869 | #endif | |
870 | #ifdef SIGINFO | |
871 | { SIGINFO, "INFO" }, | |
872 | #endif | |
873 | #ifdef SIGLOST | |
874 | { SIGLOST, "LOST" }, | |
875 | #endif | |
876 | #ifdef SIGPWR | |
877 | { SIGPWR, "PWR" }, | |
878 | #endif | |
879 | #ifdef SIGUNUSED | |
880 | { SIGUNUSED, "UNUSED" }, | |
881 | #endif | |
882 | #ifdef SIGSYS | |
883 | { SIGSYS, "SYS" }, | |
884 | #endif | |
885 | }; | |
886 | ||
887 | static int sig_num(const char *sig) | |
888 | { | |
889 | unsigned int signum; | |
890 | ||
891 | if (lxc_safe_uint(sig, &signum) < 0) | |
892 | return -1; | |
893 | ||
894 | return signum; | |
895 | } | |
896 | ||
897 | static int rt_sig_num(const char *signame) | |
898 | { | |
899 | int rtmax = 0, sig_n = 0; | |
900 | ||
29c98ddd | 901 | if (strncasecmp(signame, "max-", 4) == 0) |
f6e32eb0 | 902 | rtmax = 1; |
f6e32eb0 CB |
903 | |
904 | signame += 4; | |
905 | if (!isdigit(*signame)) | |
906 | return -1; | |
907 | ||
908 | sig_n = sig_num(signame); | |
909 | sig_n = rtmax ? SIGRTMAX - sig_n : SIGRTMIN + sig_n; | |
910 | if (sig_n > SIGRTMAX || sig_n < SIGRTMIN) | |
911 | return -1; | |
912 | ||
913 | return sig_n; | |
914 | } | |
915 | ||
916 | int sig_parse(const char *signame) | |
917 | { | |
918 | size_t n; | |
919 | ||
920 | if (isdigit(*signame)) { | |
921 | return sig_num(signame); | |
922 | } else if (strncasecmp(signame, "sig", 3) == 0) { | |
923 | signame += 3; | |
924 | if (strncasecmp(signame, "rt", 2) == 0) | |
925 | return rt_sig_num(signame + 2); | |
29c98ddd | 926 | |
927 | for (n = 0; n < sizeof(signames) / sizeof((signames)[0]); n++) | |
f6e32eb0 CB |
928 | if (strcasecmp(signames[n].name, signame) == 0) |
929 | return signames[n].num; | |
f6e32eb0 CB |
930 | } |
931 | ||
932 | return -1; | |
933 | } |