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Commit | Line | Data |
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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
0ad19a3f | 8 | * |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
0ad19a3f | 22 | */ |
cb0dc11b | 23 | |
d38dd64a CB |
24 | #ifndef _GNU_SOURCE |
25 | #define _GNU_SOURCE 1 | |
26 | #endif | |
27 | #include <arpa/inet.h> | |
cb0dc11b CB |
28 | #include <ctype.h> |
29 | #include <errno.h> | |
30 | #include <fcntl.h> | |
0ad19a3f | 31 | #include <linux/netlink.h> |
32 | #include <linux/rtnetlink.h> | |
33 | #include <linux/sockios.h> | |
cb0dc11b CB |
34 | #include <net/ethernet.h> |
35 | #include <net/if.h> | |
36 | #include <net/if_arp.h> | |
37 | #include <netinet/in.h> | |
d38dd64a CB |
38 | #include <stdio.h> |
39 | #include <stdlib.h> | |
40 | #include <string.h> | |
cb0dc11b CB |
41 | #include <sys/inotify.h> |
42 | #include <sys/ioctl.h> | |
43 | #include <sys/param.h> | |
44 | #include <sys/socket.h> | |
45 | #include <sys/stat.h> | |
46 | #include <sys/types.h> | |
d38dd64a CB |
47 | #include <time.h> |
48 | #include <unistd.h> | |
f549edcc | 49 | |
d38dd64a | 50 | #include "../include/netns_ifaddrs.h" |
7ab1ba02 | 51 | #include "af_unix.h" |
72d0e1cb | 52 | #include "conf.h" |
811ef482 | 53 | #include "config.h" |
e3233f26 | 54 | #include "file_utils.h" |
cb0dc11b | 55 | #include "log.h" |
8335fd40 | 56 | #include "macro.h" |
cb0dc11b CB |
57 | #include "network.h" |
58 | #include "nl.h" | |
d7b58715 | 59 | #include "raw_syscalls.h" |
59524108 | 60 | #include "syscall_wrappers.h" |
0d204771 | 61 | #include "utils.h" |
0ad19a3f | 62 | |
9de31d5a CB |
63 | #ifndef HAVE_STRLCPY |
64 | #include "include/strlcpy.h" | |
65 | #endif | |
66 | ||
ac2cecc4 | 67 | lxc_log_define(network, lxc); |
f8fee0e2 | 68 | |
811ef482 CB |
69 | typedef int (*instantiate_cb)(struct lxc_handler *, struct lxc_netdev *); |
70 | ||
71 | static int instantiate_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
72 | { | |
73 | int bridge_index, err; | |
74 | char *veth1, *veth2; | |
75 | char veth1buf[IFNAMSIZ], veth2buf[IFNAMSIZ]; | |
76 | unsigned int mtu = 0; | |
77 | ||
de4855a8 | 78 | if (netdev->priv.veth_attr.pair[0] != '\0') { |
811ef482 CB |
79 | veth1 = netdev->priv.veth_attr.pair; |
80 | if (handler->conf->reboot) | |
81 | lxc_netdev_delete_by_name(veth1); | |
82 | } else { | |
83 | err = snprintf(veth1buf, sizeof(veth1buf), "vethXXXXXX"); | |
84 | if (err < 0 || (size_t)err >= sizeof(veth1buf)) | |
85 | return -1; | |
86 | ||
87 | veth1 = lxc_mkifname(veth1buf); | |
88 | if (!veth1) | |
89 | return -1; | |
90 | ||
91 | /* store away for deconf */ | |
92 | memcpy(netdev->priv.veth_attr.veth1, veth1, IFNAMSIZ); | |
93 | } | |
94 | ||
d34212ad CB |
95 | err = snprintf(veth2buf, sizeof(veth2buf), "vethXXXXXX"); |
96 | if (err < 0 || (size_t)err >= sizeof(veth2buf)) | |
97 | return -1; | |
98 | ||
811ef482 CB |
99 | veth2 = lxc_mkifname(veth2buf); |
100 | if (!veth2) | |
101 | goto out_delete; | |
102 | ||
103 | err = lxc_veth_create(veth1, veth2); | |
104 | if (err) { | |
6d1400b5 | 105 | errno = -err; |
106 | SYSERROR("Failed to create veth pair \"%s\" and \"%s\"", veth1, veth2); | |
811ef482 CB |
107 | goto out_delete; |
108 | } | |
109 | ||
110 | /* changing the high byte of the mac address to 0xfe, the bridge interface | |
111 | * will always keep the host's mac address and not take the mac address | |
112 | * of a container */ | |
113 | err = setup_private_host_hw_addr(veth1); | |
114 | if (err) { | |
6d1400b5 | 115 | errno = -err; |
116 | SYSERROR("Failed to change mac address of host interface \"%s\"", veth1); | |
811ef482 CB |
117 | goto out_delete; |
118 | } | |
119 | ||
8da62485 CB |
120 | /* Retrieve ifindex of the host's veth device. */ |
121 | netdev->priv.veth_attr.ifindex = if_nametoindex(veth1); | |
122 | if (!netdev->priv.veth_attr.ifindex) { | |
123 | ERROR("Failed to retrieve ifindex for \"%s\"", veth1); | |
124 | goto out_delete; | |
125 | } | |
126 | ||
127 | /* Note that we're retrieving the container's ifindex in the host's | |
128 | * network namespace because we need it to move the device from the | |
129 | * host's network namespace to the container's network namespace later | |
130 | * on. | |
131 | */ | |
811ef482 CB |
132 | netdev->ifindex = if_nametoindex(veth2); |
133 | if (!netdev->ifindex) { | |
134 | ERROR("Failed to retrieve ifindex for \"%s\"", veth2); | |
135 | goto out_delete; | |
136 | } | |
137 | ||
138 | if (netdev->mtu) { | |
139 | if (lxc_safe_uint(netdev->mtu, &mtu) < 0) | |
140 | WARN("Failed to parse mtu"); | |
141 | else | |
142 | INFO("Retrieved mtu %d", mtu); | |
de4855a8 | 143 | } else if (netdev->link[0] != '\0') { |
811ef482 CB |
144 | bridge_index = if_nametoindex(netdev->link); |
145 | if (bridge_index) { | |
146 | mtu = netdev_get_mtu(bridge_index); | |
147 | INFO("Retrieved mtu %d from %s", mtu, netdev->link); | |
148 | } else { | |
149 | mtu = netdev_get_mtu(netdev->ifindex); | |
150 | INFO("Retrieved mtu %d from %s", mtu, veth2); | |
151 | } | |
152 | } | |
153 | ||
154 | if (mtu) { | |
155 | err = lxc_netdev_set_mtu(veth1, mtu); | |
156 | if (!err) | |
157 | err = lxc_netdev_set_mtu(veth2, mtu); | |
6d1400b5 | 158 | |
811ef482 | 159 | if (err) { |
6d1400b5 | 160 | errno = -err; |
161 | SYSERROR("Failed to set mtu \"%d\" for veth pair \"%s\" " | |
162 | "and \"%s\"", mtu, veth1, veth2); | |
811ef482 CB |
163 | goto out_delete; |
164 | } | |
165 | } | |
166 | ||
de4855a8 | 167 | if (netdev->link[0] != '\0') { |
811ef482 CB |
168 | err = lxc_bridge_attach(netdev->link, veth1); |
169 | if (err) { | |
6d1400b5 | 170 | errno = -err; |
171 | SYSERROR("Failed to attach \"%s\" to bridge \"%s\"", | |
172 | veth1, netdev->link); | |
811ef482 CB |
173 | goto out_delete; |
174 | } | |
175 | INFO("Attached \"%s\" to bridge \"%s\"", veth1, netdev->link); | |
176 | } | |
177 | ||
178 | err = lxc_netdev_up(veth1); | |
179 | if (err) { | |
6d1400b5 | 180 | errno = -err; |
181 | SYSERROR("Failed to set \"%s\" up", veth1); | |
811ef482 CB |
182 | goto out_delete; |
183 | } | |
184 | ||
185 | if (netdev->upscript) { | |
14a7b0f9 CB |
186 | char *argv[] = { |
187 | "veth", | |
188 | netdev->link, | |
990b9ac3 | 189 | veth1, |
14a7b0f9 CB |
190 | NULL, |
191 | }; | |
192 | ||
193 | err = run_script_argv(handler->name, | |
194 | handler->conf->hooks_version, "net", | |
195 | netdev->upscript, "up", argv); | |
196 | if (err < 0) | |
811ef482 CB |
197 | goto out_delete; |
198 | } | |
199 | ||
200 | DEBUG("Instantiated veth \"%s/%s\", index is \"%d\"", veth1, veth2, | |
201 | netdev->ifindex); | |
202 | ||
203 | return 0; | |
204 | ||
205 | out_delete: | |
206 | if (netdev->ifindex != 0) | |
207 | lxc_netdev_delete_by_name(veth1); | |
811ef482 CB |
208 | return -1; |
209 | } | |
210 | ||
211 | static int instantiate_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
212 | { | |
213 | char peerbuf[IFNAMSIZ], *peer; | |
214 | int err; | |
215 | ||
de4855a8 | 216 | if (netdev->link[0] == '\0') { |
811ef482 CB |
217 | ERROR("No link for macvlan network device specified"); |
218 | return -1; | |
219 | } | |
220 | ||
221 | err = snprintf(peerbuf, sizeof(peerbuf), "mcXXXXXX"); | |
222 | if (err < 0 || (size_t)err >= sizeof(peerbuf)) | |
223 | return -1; | |
224 | ||
225 | peer = lxc_mkifname(peerbuf); | |
226 | if (!peer) | |
227 | return -1; | |
228 | ||
229 | err = lxc_macvlan_create(netdev->link, peer, | |
230 | netdev->priv.macvlan_attr.mode); | |
231 | if (err) { | |
6d1400b5 | 232 | errno = -err; |
233 | SYSERROR("Failed to create macvlan interface \"%s\" on \"%s\"", | |
234 | peer, netdev->link); | |
966e9f1f | 235 | goto on_error; |
811ef482 CB |
236 | } |
237 | ||
238 | netdev->ifindex = if_nametoindex(peer); | |
239 | if (!netdev->ifindex) { | |
240 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
966e9f1f | 241 | goto on_error; |
811ef482 CB |
242 | } |
243 | ||
244 | if (netdev->upscript) { | |
14a7b0f9 CB |
245 | char *argv[] = { |
246 | "macvlan", | |
247 | netdev->link, | |
248 | NULL, | |
249 | }; | |
250 | ||
251 | err = run_script_argv(handler->name, | |
252 | handler->conf->hooks_version, "net", | |
253 | netdev->upscript, "up", argv); | |
254 | if (err < 0) | |
966e9f1f | 255 | goto on_error; |
811ef482 CB |
256 | } |
257 | ||
258 | DEBUG("Instantiated macvlan \"%s\" with ifindex is %d and mode %d", | |
259 | peer, netdev->ifindex, netdev->priv.macvlan_attr.mode); | |
260 | ||
261 | return 0; | |
966e9f1f CB |
262 | |
263 | on_error: | |
811ef482 | 264 | lxc_netdev_delete_by_name(peer); |
811ef482 CB |
265 | return -1; |
266 | } | |
267 | ||
268 | static int instantiate_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
269 | { | |
270 | char peer[IFNAMSIZ]; | |
271 | int err; | |
272 | static uint16_t vlan_cntr = 0; | |
273 | unsigned int mtu = 0; | |
274 | ||
de4855a8 | 275 | if (netdev->link[0] == '\0') { |
811ef482 CB |
276 | ERROR("No link for vlan network device specified"); |
277 | return -1; | |
278 | } | |
279 | ||
280 | err = snprintf(peer, sizeof(peer), "vlan%d-%d", netdev->priv.vlan_attr.vid, vlan_cntr++); | |
281 | if (err < 0 || (size_t)err >= sizeof(peer)) | |
282 | return -1; | |
283 | ||
284 | err = lxc_vlan_create(netdev->link, peer, netdev->priv.vlan_attr.vid); | |
285 | if (err) { | |
6d1400b5 | 286 | errno = -err; |
287 | SYSERROR("Failed to create vlan interface \"%s\" on \"%s\"", | |
288 | peer, netdev->link); | |
811ef482 CB |
289 | return -1; |
290 | } | |
291 | ||
292 | netdev->ifindex = if_nametoindex(peer); | |
293 | if (!netdev->ifindex) { | |
294 | ERROR("Failed to retrieve ifindex for \"%s\"", peer); | |
295 | lxc_netdev_delete_by_name(peer); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | DEBUG("Instantiated vlan \"%s\" with ifindex is \"%d\" (vlan1000)", | |
300 | peer, netdev->ifindex); | |
301 | if (netdev->mtu) { | |
302 | if (lxc_safe_uint(netdev->mtu, &mtu) < 0) { | |
303 | ERROR("Failed to retrieve mtu from \"%d\"/\"%s\".", | |
304 | netdev->ifindex, | |
de4855a8 | 305 | netdev->name[0] != '\0' ? netdev->name : "(null)"); |
811ef482 CB |
306 | return -1; |
307 | } | |
6d1400b5 | 308 | |
811ef482 CB |
309 | err = lxc_netdev_set_mtu(peer, mtu); |
310 | if (err) { | |
6d1400b5 | 311 | errno = -err; |
312 | SYSERROR("Failed to set mtu \"%s\" for \"%s\"", | |
313 | netdev->mtu, peer); | |
811ef482 CB |
314 | lxc_netdev_delete_by_name(peer); |
315 | return -1; | |
316 | } | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static int instantiate_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
323 | { | |
14a7b0f9 CB |
324 | int ret; |
325 | char *argv[] = { | |
326 | "phys", | |
327 | netdev->link, | |
328 | NULL, | |
329 | }; | |
330 | ||
de4855a8 | 331 | if (netdev->link[0] == '\0') { |
811ef482 CB |
332 | ERROR("No link for physical interface specified"); |
333 | return -1; | |
334 | } | |
335 | ||
790255cf CB |
336 | /* Note that we're retrieving the container's ifindex in the host's |
337 | * network namespace because we need it to move the device from the | |
338 | * host's network namespace to the container's network namespace later | |
339 | * on. | |
340 | * Note that netdev->link will contain the name of the physical network | |
341 | * device in the host's namespace. | |
342 | */ | |
811ef482 CB |
343 | netdev->ifindex = if_nametoindex(netdev->link); |
344 | if (!netdev->ifindex) { | |
345 | ERROR("Failed to retrieve ifindex for \"%s\"", netdev->link); | |
346 | return -1; | |
347 | } | |
348 | ||
790255cf CB |
349 | /* Store the ifindex of the host's network device in the host's |
350 | * namespace. | |
351 | */ | |
352 | netdev->priv.phys_attr.ifindex = netdev->ifindex; | |
353 | ||
14a7b0f9 CB |
354 | if (!netdev->upscript) |
355 | return 0; | |
356 | ||
357 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
358 | "net", netdev->upscript, "up", argv); | |
359 | if (ret < 0) | |
360 | return -1; | |
811ef482 CB |
361 | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static int instantiate_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
366 | { | |
14a7b0f9 CB |
367 | int ret; |
368 | char *argv[] = { | |
369 | "empty", | |
370 | NULL, | |
371 | }; | |
372 | ||
811ef482 | 373 | netdev->ifindex = 0; |
14a7b0f9 CB |
374 | if (!netdev->upscript) |
375 | return 0; | |
376 | ||
377 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
378 | "net", netdev->upscript, "up", argv); | |
379 | if (ret < 0) | |
380 | return -1; | |
381 | ||
811ef482 CB |
382 | return 0; |
383 | } | |
384 | ||
385 | static int instantiate_none(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
386 | { | |
387 | netdev->ifindex = 0; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | static instantiate_cb netdev_conf[LXC_NET_MAXCONFTYPE + 1] = { | |
392 | [LXC_NET_VETH] = instantiate_veth, | |
393 | [LXC_NET_MACVLAN] = instantiate_macvlan, | |
394 | [LXC_NET_VLAN] = instantiate_vlan, | |
395 | [LXC_NET_PHYS] = instantiate_phys, | |
396 | [LXC_NET_EMPTY] = instantiate_empty, | |
397 | [LXC_NET_NONE] = instantiate_none, | |
398 | }; | |
399 | ||
400 | static int shutdown_veth(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
401 | { | |
14a7b0f9 CB |
402 | int ret; |
403 | char *argv[] = { | |
404 | "veth", | |
405 | netdev->link, | |
406 | NULL, | |
407 | NULL, | |
408 | }; | |
409 | ||
410 | if (!netdev->downscript) | |
411 | return 0; | |
811ef482 | 412 | |
de4855a8 | 413 | if (netdev->priv.veth_attr.pair[0] != '\0') |
14a7b0f9 | 414 | argv[2] = netdev->priv.veth_attr.pair; |
811ef482 | 415 | else |
14a7b0f9 CB |
416 | argv[2] = netdev->priv.veth_attr.veth1; |
417 | ||
418 | ret = run_script_argv(handler->name, | |
419 | handler->conf->hooks_version, "net", | |
420 | netdev->downscript, "down", argv); | |
421 | if (ret < 0) | |
422 | return -1; | |
811ef482 | 423 | |
811ef482 CB |
424 | return 0; |
425 | } | |
426 | ||
427 | static int shutdown_macvlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
428 | { | |
14a7b0f9 CB |
429 | int ret; |
430 | char *argv[] = { | |
431 | "macvlan", | |
432 | netdev->link, | |
433 | NULL, | |
434 | }; | |
435 | ||
436 | if (!netdev->downscript) | |
437 | return 0; | |
438 | ||
439 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
440 | "net", netdev->downscript, "down", argv); | |
441 | if (ret < 0) | |
442 | return -1; | |
811ef482 | 443 | |
811ef482 CB |
444 | return 0; |
445 | } | |
446 | ||
447 | static int shutdown_vlan(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
448 | { | |
449 | return 0; | |
450 | } | |
451 | ||
452 | static int shutdown_phys(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
453 | { | |
14a7b0f9 CB |
454 | int ret; |
455 | char *argv[] = { | |
456 | "phys", | |
457 | netdev->link, | |
458 | NULL, | |
459 | }; | |
460 | ||
461 | if (!netdev->downscript) | |
462 | return 0; | |
463 | ||
464 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
465 | "net", netdev->downscript, "down", argv); | |
466 | if (ret < 0) | |
467 | return -1; | |
811ef482 | 468 | |
811ef482 CB |
469 | return 0; |
470 | } | |
471 | ||
472 | static int shutdown_empty(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
473 | { | |
14a7b0f9 CB |
474 | int ret; |
475 | char *argv[] = { | |
476 | "empty", | |
477 | NULL, | |
478 | }; | |
479 | ||
480 | if (!netdev->downscript) | |
481 | return 0; | |
482 | ||
483 | ret = run_script_argv(handler->name, handler->conf->hooks_version, | |
484 | "net", netdev->downscript, "down", argv); | |
485 | if (ret < 0) | |
486 | return -1; | |
811ef482 | 487 | |
811ef482 CB |
488 | return 0; |
489 | } | |
490 | ||
491 | static int shutdown_none(struct lxc_handler *handler, struct lxc_netdev *netdev) | |
492 | { | |
493 | return 0; | |
494 | } | |
495 | ||
496 | static instantiate_cb netdev_deconf[LXC_NET_MAXCONFTYPE + 1] = { | |
497 | [LXC_NET_VETH] = shutdown_veth, | |
498 | [LXC_NET_MACVLAN] = shutdown_macvlan, | |
499 | [LXC_NET_VLAN] = shutdown_vlan, | |
500 | [LXC_NET_PHYS] = shutdown_phys, | |
501 | [LXC_NET_EMPTY] = shutdown_empty, | |
502 | [LXC_NET_NONE] = shutdown_none, | |
503 | }; | |
504 | ||
ebc73a67 | 505 | int lxc_netdev_move_by_index(int ifindex, pid_t pid, const char *ifname) |
0ad19a3f | 506 | { |
ebc73a67 | 507 | int err; |
0ad19a3f | 508 | struct nl_handler nlh; |
06f976ca | 509 | struct ifinfomsg *ifi; |
ebc73a67 | 510 | struct nlmsg *nlmsg = NULL; |
0ad19a3f | 511 | |
3cfc0f3a MN |
512 | err = netlink_open(&nlh, NETLINK_ROUTE); |
513 | if (err) | |
514 | return err; | |
0ad19a3f | 515 | |
3cfc0f3a | 516 | err = -ENOMEM; |
0ad19a3f | 517 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
518 | if (!nlmsg) | |
519 | goto out; | |
520 | ||
ebc73a67 | 521 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
522 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
523 | ||
524 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
525 | if (!ifi) |
526 | goto out; | |
06f976ca SZ |
527 | ifi->ifi_family = AF_UNSPEC; |
528 | ifi->ifi_index = ifindex; | |
0ad19a3f | 529 | |
530 | if (nla_put_u32(nlmsg, IFLA_NET_NS_PID, pid)) | |
531 | goto out; | |
532 | ||
8d357196 DY |
533 | if (ifname != NULL) { |
534 | if (nla_put_string(nlmsg, IFLA_IFNAME, ifname)) | |
535 | goto out; | |
536 | } | |
537 | ||
3cfc0f3a | 538 | err = netlink_transaction(&nlh, nlmsg, nlmsg); |
0ad19a3f | 539 | out: |
540 | netlink_close(&nlh); | |
541 | nlmsg_free(nlmsg); | |
542 | return err; | |
543 | } | |
544 | ||
ebc73a67 CB |
545 | /* If we are asked to move a wireless interface, then we must actually move its |
546 | * phyN device. Detect that condition and return the physname here. The physname | |
547 | * will be passed to lxc_netdev_move_wlan() which will free it when done. | |
e5848d39 SH |
548 | */ |
549 | #define PHYSNAME "/sys/class/net/%s/phy80211/name" | |
ebc73a67 | 550 | static char *is_wlan(const char *ifname) |
e5848d39 | 551 | { |
ebc73a67 | 552 | int i, ret; |
e5848d39 | 553 | long physlen; |
ebc73a67 CB |
554 | size_t len; |
555 | char *path; | |
e5848d39 | 556 | FILE *f; |
ebc73a67 | 557 | char *physname = NULL; |
e5848d39 | 558 | |
ebc73a67 CB |
559 | len = strlen(ifname) + strlen(PHYSNAME) - 1; |
560 | path = alloca(len + 1); | |
e5848d39 | 561 | ret = snprintf(path, len, PHYSNAME, ifname); |
ebc73a67 | 562 | if (ret < 0 || (size_t)ret >= len) |
e5848d39 | 563 | goto bad; |
ebc73a67 | 564 | |
ebc73a67 CB |
565 | f = fopen(path, "r"); |
566 | if (!f) | |
e5848d39 | 567 | goto bad; |
ebc73a67 | 568 | |
1a0e70ac | 569 | /* Feh - sb.st_size is always 4096. */ |
e5848d39 SH |
570 | fseek(f, 0, SEEK_END); |
571 | physlen = ftell(f); | |
572 | fseek(f, 0, SEEK_SET); | |
7d1cde93 SX |
573 | if (physlen < 0) { |
574 | fclose(f); | |
0382c0da | 575 | goto bad; |
7d1cde93 | 576 | } |
ebc73a67 CB |
577 | |
578 | physname = malloc(physlen + 1); | |
ee54ea9a | 579 | if (!physname) { |
acf47e1b | 580 | fclose(f); |
e5848d39 | 581 | goto bad; |
ee54ea9a | 582 | } |
ebc73a67 CB |
583 | |
584 | memset(physname, 0, physlen + 1); | |
e5848d39 SH |
585 | ret = fread(physname, 1, physlen, f); |
586 | fclose(f); | |
587 | if (ret < 0) | |
588 | goto bad; | |
589 | ||
ebc73a67 | 590 | for (i = 0; i < physlen; i++) { |
e5848d39 SH |
591 | if (physname[i] == '\n') |
592 | physname[i] = '\0'; | |
ebc73a67 | 593 | |
e5848d39 SH |
594 | if (physname[i] == '\0') |
595 | break; | |
596 | } | |
597 | ||
598 | return physname; | |
599 | ||
600 | bad: | |
f10fad2f | 601 | free(physname); |
e5848d39 SH |
602 | return NULL; |
603 | } | |
604 | ||
ebc73a67 CB |
605 | static int lxc_netdev_rename_by_name_in_netns(pid_t pid, const char *old, |
606 | const char *new) | |
e5848d39 | 607 | { |
ebc73a67 | 608 | pid_t fpid; |
e5848d39 | 609 | |
ebc73a67 | 610 | fpid = fork(); |
e5848d39 SH |
611 | if (fpid < 0) |
612 | return -1; | |
ebc73a67 | 613 | |
e5848d39 SH |
614 | if (fpid != 0) |
615 | return wait_for_pid(fpid); | |
ebc73a67 | 616 | |
e5848d39 SH |
617 | if (!switch_to_ns(pid, "net")) |
618 | return -1; | |
ebc73a67 | 619 | |
05ec44f8 | 620 | _exit(lxc_netdev_rename_by_name(old, new)); |
e5848d39 SH |
621 | } |
622 | ||
ebc73a67 CB |
623 | static int lxc_netdev_move_wlan(char *physname, const char *ifname, pid_t pid, |
624 | const char *newname) | |
e5848d39 | 625 | { |
e5848d39 | 626 | char *cmd; |
ebc73a67 CB |
627 | pid_t fpid; |
628 | int err = -1; | |
e5848d39 SH |
629 | |
630 | /* Move phyN into the container. TODO - do this using netlink. | |
ebc73a67 CB |
631 | * However, IIUC this involves a bit more complicated work to talk to |
632 | * the 80211 module, so for now just call out to iw. | |
e5848d39 SH |
633 | */ |
634 | cmd = on_path("iw", NULL); | |
635 | if (!cmd) | |
636 | goto out1; | |
637 | free(cmd); | |
638 | ||
639 | fpid = fork(); | |
640 | if (fpid < 0) | |
641 | goto out1; | |
ebc73a67 | 642 | |
e5848d39 SH |
643 | if (fpid == 0) { |
644 | char pidstr[30]; | |
645 | sprintf(pidstr, "%d", pid); | |
ebc73a67 CB |
646 | execlp("iw", "iw", "phy", physname, "set", "netns", pidstr, |
647 | (char *)NULL); | |
ebd582ae | 648 | _exit(EXIT_FAILURE); |
e5848d39 | 649 | } |
ebc73a67 | 650 | |
e5848d39 SH |
651 | if (wait_for_pid(fpid)) |
652 | goto out1; | |
653 | ||
654 | err = 0; | |
655 | if (newname) | |
656 | err = lxc_netdev_rename_by_name_in_netns(pid, ifname, newname); | |
657 | ||
658 | out1: | |
659 | free(physname); | |
660 | return err; | |
661 | } | |
662 | ||
8d357196 | 663 | int lxc_netdev_move_by_name(const char *ifname, pid_t pid, const char* newname) |
8befa924 SH |
664 | { |
665 | int index; | |
e5848d39 | 666 | char *physname; |
8befa924 | 667 | |
8befa924 SH |
668 | if (!ifname) |
669 | return -EINVAL; | |
670 | ||
32571606 | 671 | index = if_nametoindex(ifname); |
49428bf3 DY |
672 | if (!index) |
673 | return -EINVAL; | |
32571606 | 674 | |
ebc73a67 CB |
675 | physname = is_wlan(ifname); |
676 | if (physname) | |
e5848d39 SH |
677 | return lxc_netdev_move_wlan(physname, ifname, pid, newname); |
678 | ||
8d357196 | 679 | return lxc_netdev_move_by_index(index, pid, newname); |
8befa924 SH |
680 | } |
681 | ||
b84f58b9 | 682 | int lxc_netdev_delete_by_index(int ifindex) |
0ad19a3f | 683 | { |
b84f58b9 | 684 | int err; |
ebc73a67 CB |
685 | struct ifinfomsg *ifi; |
686 | struct nl_handler nlh; | |
687 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
0ad19a3f | 688 | |
3cfc0f3a MN |
689 | err = netlink_open(&nlh, NETLINK_ROUTE); |
690 | if (err) | |
691 | return err; | |
0ad19a3f | 692 | |
3cfc0f3a | 693 | err = -ENOMEM; |
0ad19a3f | 694 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
695 | if (!nlmsg) | |
696 | goto out; | |
697 | ||
06f976ca | 698 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 699 | if (!answer) |
700 | goto out; | |
701 | ||
ebc73a67 | 702 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST; |
06f976ca SZ |
703 | nlmsg->nlmsghdr->nlmsg_type = RTM_DELLINK; |
704 | ||
705 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
706 | if (!ifi) |
707 | goto out; | |
06f976ca SZ |
708 | ifi->ifi_family = AF_UNSPEC; |
709 | ifi->ifi_index = ifindex; | |
0ad19a3f | 710 | |
3cfc0f3a | 711 | err = netlink_transaction(&nlh, nlmsg, answer); |
0ad19a3f | 712 | out: |
713 | netlink_close(&nlh); | |
714 | nlmsg_free(answer); | |
715 | nlmsg_free(nlmsg); | |
716 | return err; | |
717 | } | |
718 | ||
b84f58b9 DL |
719 | int lxc_netdev_delete_by_name(const char *name) |
720 | { | |
721 | int index; | |
722 | ||
723 | index = if_nametoindex(name); | |
724 | if (!index) | |
725 | return -EINVAL; | |
726 | ||
727 | return lxc_netdev_delete_by_index(index); | |
728 | } | |
729 | ||
730 | int lxc_netdev_rename_by_index(int ifindex, const char *newname) | |
b9a5bb58 | 731 | { |
ebc73a67 | 732 | int err, len; |
06f976ca | 733 | struct ifinfomsg *ifi; |
ebc73a67 CB |
734 | struct nl_handler nlh; |
735 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
b9a5bb58 | 736 | |
3cfc0f3a MN |
737 | err = netlink_open(&nlh, NETLINK_ROUTE); |
738 | if (err) | |
739 | return err; | |
b9a5bb58 | 740 | |
b84f58b9 | 741 | len = strlen(newname); |
dae3fdf6 | 742 | if (len == 1 || len >= IFNAMSIZ) |
b84f58b9 DL |
743 | goto out; |
744 | ||
3cfc0f3a | 745 | err = -ENOMEM; |
b9a5bb58 DL |
746 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
747 | if (!nlmsg) | |
748 | goto out; | |
749 | ||
06f976ca | 750 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
b9a5bb58 DL |
751 | if (!answer) |
752 | goto out; | |
753 | ||
ebc73a67 | 754 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_ACK | NLM_F_REQUEST; |
06f976ca SZ |
755 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
756 | ||
757 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
758 | if (!ifi) |
759 | goto out; | |
06f976ca SZ |
760 | ifi->ifi_family = AF_UNSPEC; |
761 | ifi->ifi_index = ifindex; | |
b84f58b9 DL |
762 | |
763 | if (nla_put_string(nlmsg, IFLA_IFNAME, newname)) | |
764 | goto out; | |
b9a5bb58 | 765 | |
3cfc0f3a | 766 | err = netlink_transaction(&nlh, nlmsg, answer); |
b9a5bb58 DL |
767 | out: |
768 | netlink_close(&nlh); | |
769 | nlmsg_free(answer); | |
770 | nlmsg_free(nlmsg); | |
771 | return err; | |
772 | } | |
773 | ||
b84f58b9 DL |
774 | int lxc_netdev_rename_by_name(const char *oldname, const char *newname) |
775 | { | |
776 | int len, index; | |
777 | ||
778 | len = strlen(oldname); | |
dae3fdf6 | 779 | if (len == 1 || len >= IFNAMSIZ) |
b84f58b9 DL |
780 | return -EINVAL; |
781 | ||
782 | index = if_nametoindex(oldname); | |
783 | if (!index) | |
784 | return -EINVAL; | |
785 | ||
786 | return lxc_netdev_rename_by_index(index, newname); | |
787 | } | |
788 | ||
8befa924 | 789 | int netdev_set_flag(const char *name, int flag) |
0ad19a3f | 790 | { |
ebc73a67 | 791 | int err, index, len; |
06f976ca | 792 | struct ifinfomsg *ifi; |
ebc73a67 CB |
793 | struct nl_handler nlh; |
794 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
0ad19a3f | 795 | |
3cfc0f3a MN |
796 | err = netlink_open(&nlh, NETLINK_ROUTE); |
797 | if (err) | |
798 | return err; | |
0ad19a3f | 799 | |
3cfc0f3a | 800 | err = -EINVAL; |
0ad19a3f | 801 | len = strlen(name); |
dae3fdf6 | 802 | if (len == 1 || len >= IFNAMSIZ) |
0ad19a3f | 803 | goto out; |
804 | ||
3cfc0f3a | 805 | err = -ENOMEM; |
0ad19a3f | 806 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
807 | if (!nlmsg) | |
808 | goto out; | |
809 | ||
06f976ca | 810 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 811 | if (!answer) |
812 | goto out; | |
813 | ||
3cfc0f3a | 814 | err = -EINVAL; |
0ad19a3f | 815 | index = if_nametoindex(name); |
816 | if (!index) | |
817 | goto out; | |
818 | ||
ebc73a67 | 819 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
820 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
821 | ||
822 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
823 | if (!ifi) { |
824 | err = -ENOMEM; | |
825 | goto out; | |
826 | } | |
06f976ca SZ |
827 | ifi->ifi_family = AF_UNSPEC; |
828 | ifi->ifi_index = index; | |
829 | ifi->ifi_change |= IFF_UP; | |
830 | ifi->ifi_flags |= flag; | |
0ad19a3f | 831 | |
832 | err = netlink_transaction(&nlh, nlmsg, answer); | |
0ad19a3f | 833 | out: |
834 | netlink_close(&nlh); | |
835 | nlmsg_free(nlmsg); | |
836 | nlmsg_free(answer); | |
837 | return err; | |
838 | } | |
839 | ||
ebc73a67 | 840 | int netdev_get_flag(const char *name, int *flag) |
efa1cf45 | 841 | { |
ebc73a67 | 842 | int err, index, len; |
a4318300 | 843 | struct ifinfomsg *ifi; |
ebc73a67 CB |
844 | struct nl_handler nlh; |
845 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
efa1cf45 DY |
846 | |
847 | if (!name) | |
848 | return -EINVAL; | |
849 | ||
850 | err = netlink_open(&nlh, NETLINK_ROUTE); | |
851 | if (err) | |
852 | return err; | |
853 | ||
854 | err = -EINVAL; | |
855 | len = strlen(name); | |
856 | if (len == 1 || len >= IFNAMSIZ) | |
857 | goto out; | |
858 | ||
859 | err = -ENOMEM; | |
860 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
861 | if (!nlmsg) | |
862 | goto out; | |
863 | ||
06f976ca | 864 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
efa1cf45 DY |
865 | if (!answer) |
866 | goto out; | |
867 | ||
868 | err = -EINVAL; | |
869 | index = if_nametoindex(name); | |
870 | if (!index) | |
871 | goto out; | |
872 | ||
06f976ca SZ |
873 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST; |
874 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETLINK; | |
875 | ||
876 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
877 | if (!ifi) { |
878 | err = -ENOMEM; | |
879 | goto out; | |
880 | } | |
06f976ca SZ |
881 | ifi->ifi_family = AF_UNSPEC; |
882 | ifi->ifi_index = index; | |
efa1cf45 DY |
883 | |
884 | err = netlink_transaction(&nlh, nlmsg, answer); | |
885 | if (err) | |
886 | goto out; | |
887 | ||
06f976ca | 888 | ifi = NLMSG_DATA(answer->nlmsghdr); |
efa1cf45 DY |
889 | |
890 | *flag = ifi->ifi_flags; | |
891 | out: | |
892 | netlink_close(&nlh); | |
893 | nlmsg_free(nlmsg); | |
894 | nlmsg_free(answer); | |
895 | return err; | |
896 | } | |
897 | ||
898 | /* | |
899 | * \brief Check a interface is up or not. | |
900 | * | |
901 | * \param name: name for the interface. | |
902 | * | |
903 | * \return int. | |
904 | * 0 means interface is down. | |
905 | * 1 means interface is up. | |
906 | * Others means error happened, and ret-value is the error number. | |
907 | */ | |
ebc73a67 | 908 | int lxc_netdev_isup(const char *name) |
efa1cf45 | 909 | { |
ebc73a67 | 910 | int err, flag; |
efa1cf45 DY |
911 | |
912 | err = netdev_get_flag(name, &flag); | |
913 | if (err) | |
ebc73a67 CB |
914 | return err; |
915 | ||
efa1cf45 DY |
916 | if (flag & IFF_UP) |
917 | return 1; | |
ebc73a67 | 918 | |
efa1cf45 | 919 | return 0; |
efa1cf45 DY |
920 | } |
921 | ||
0130df54 SH |
922 | int netdev_get_mtu(int ifindex) |
923 | { | |
ebc73a67 | 924 | int answer_len, err, res; |
0130df54 | 925 | struct nl_handler nlh; |
06f976ca | 926 | struct ifinfomsg *ifi; |
0130df54 | 927 | struct nlmsghdr *msg; |
ebc73a67 CB |
928 | int readmore = 0, recv_len = 0; |
929 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
0130df54 SH |
930 | |
931 | err = netlink_open(&nlh, NETLINK_ROUTE); | |
932 | if (err) | |
933 | return err; | |
934 | ||
935 | err = -ENOMEM; | |
936 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
937 | if (!nlmsg) | |
938 | goto out; | |
939 | ||
06f976ca | 940 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0130df54 SH |
941 | if (!answer) |
942 | goto out; | |
943 | ||
944 | /* Save the answer buffer length, since it will be overwritten | |
945 | * on the first receive (and we might need to receive more than | |
ebc73a67 CB |
946 | * once. |
947 | */ | |
06f976ca SZ |
948 | answer_len = answer->nlmsghdr->nlmsg_len; |
949 | ||
ebc73a67 | 950 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP; |
06f976ca | 951 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETLINK; |
0130df54 | 952 | |
06f976ca | 953 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); |
25a9939b WC |
954 | if (!ifi) |
955 | goto out; | |
06f976ca | 956 | ifi->ifi_family = AF_UNSPEC; |
0130df54 SH |
957 | |
958 | /* Send the request for addresses, which returns all addresses | |
959 | * on all interfaces. */ | |
960 | err = netlink_send(&nlh, nlmsg); | |
961 | if (err < 0) | |
962 | goto out; | |
963 | ||
6ce39620 CB |
964 | #pragma GCC diagnostic push |
965 | #pragma GCC diagnostic ignored "-Wcast-align" | |
966 | ||
0130df54 SH |
967 | do { |
968 | /* Restore the answer buffer length, it might have been | |
ebc73a67 CB |
969 | * overwritten by a previous receive. |
970 | */ | |
06f976ca | 971 | answer->nlmsghdr->nlmsg_len = answer_len; |
0130df54 SH |
972 | |
973 | /* Get the (next) batch of reply messages */ | |
974 | err = netlink_rcv(&nlh, answer); | |
975 | if (err < 0) | |
976 | goto out; | |
977 | ||
978 | recv_len = err; | |
0130df54 SH |
979 | |
980 | /* Satisfy the typing for the netlink macros */ | |
06f976ca | 981 | msg = answer->nlmsghdr; |
0130df54 SH |
982 | |
983 | while (NLMSG_OK(msg, recv_len)) { | |
984 | ||
985 | /* Stop reading if we see an error message */ | |
986 | if (msg->nlmsg_type == NLMSG_ERROR) { | |
ebc73a67 CB |
987 | struct nlmsgerr *errmsg = |
988 | (struct nlmsgerr *)NLMSG_DATA(msg); | |
0130df54 SH |
989 | err = errmsg->error; |
990 | goto out; | |
991 | } | |
992 | ||
993 | /* Stop reading if we see a NLMSG_DONE message */ | |
994 | if (msg->nlmsg_type == NLMSG_DONE) { | |
995 | readmore = 0; | |
996 | break; | |
997 | } | |
998 | ||
06f976ca | 999 | ifi = NLMSG_DATA(msg); |
0130df54 SH |
1000 | if (ifi->ifi_index == ifindex) { |
1001 | struct rtattr *rta = IFLA_RTA(ifi); | |
ebc73a67 CB |
1002 | int attr_len = |
1003 | msg->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi)); | |
0130df54 | 1004 | res = 0; |
ebc73a67 CB |
1005 | while (RTA_OK(rta, attr_len)) { |
1006 | /* Found a local address for the | |
1007 | * requested interface, return it. | |
1008 | */ | |
0130df54 | 1009 | if (rta->rta_type == IFLA_MTU) { |
ebc73a67 CB |
1010 | memcpy(&res, RTA_DATA(rta), |
1011 | sizeof(int)); | |
0130df54 SH |
1012 | err = res; |
1013 | goto out; | |
1014 | } | |
1015 | rta = RTA_NEXT(rta, attr_len); | |
1016 | } | |
0130df54 SH |
1017 | } |
1018 | ||
ebc73a67 CB |
1019 | /* Keep reading more data from the socket if the last |
1020 | * message had the NLF_F_MULTI flag set. | |
1021 | */ | |
0130df54 SH |
1022 | readmore = (msg->nlmsg_flags & NLM_F_MULTI); |
1023 | ||
ebc73a67 | 1024 | /* Look at the next message received in this buffer. */ |
0130df54 SH |
1025 | msg = NLMSG_NEXT(msg, recv_len); |
1026 | } | |
1027 | } while (readmore); | |
1028 | ||
6ce39620 CB |
1029 | #pragma GCC diagnostic pop |
1030 | ||
ebc73a67 | 1031 | /* If we end up here, we didn't find any result, so signal an error. */ |
0130df54 SH |
1032 | err = -1; |
1033 | ||
1034 | out: | |
1035 | netlink_close(&nlh); | |
1036 | nlmsg_free(answer); | |
1037 | nlmsg_free(nlmsg); | |
1038 | return err; | |
1039 | } | |
1040 | ||
d472214b | 1041 | int lxc_netdev_set_mtu(const char *name, int mtu) |
75d09f83 | 1042 | { |
ebc73a67 | 1043 | int err, index, len; |
06f976ca | 1044 | struct ifinfomsg *ifi; |
ebc73a67 CB |
1045 | struct nl_handler nlh; |
1046 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
75d09f83 | 1047 | |
3cfc0f3a MN |
1048 | err = netlink_open(&nlh, NETLINK_ROUTE); |
1049 | if (err) | |
1050 | return err; | |
75d09f83 | 1051 | |
3cfc0f3a | 1052 | err = -EINVAL; |
75d09f83 | 1053 | len = strlen(name); |
dae3fdf6 | 1054 | if (len == 1 || len >= IFNAMSIZ) |
75d09f83 DL |
1055 | goto out; |
1056 | ||
3cfc0f3a | 1057 | err = -ENOMEM; |
75d09f83 DL |
1058 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1059 | if (!nlmsg) | |
1060 | goto out; | |
1061 | ||
06f976ca | 1062 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
75d09f83 DL |
1063 | if (!answer) |
1064 | goto out; | |
1065 | ||
3cfc0f3a | 1066 | err = -EINVAL; |
75d09f83 DL |
1067 | index = if_nametoindex(name); |
1068 | if (!index) | |
1069 | goto out; | |
1070 | ||
ebc73a67 | 1071 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; |
06f976ca SZ |
1072 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1073 | ||
1074 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
1075 | if (!ifi) { |
1076 | err = -ENOMEM; | |
1077 | goto out; | |
1078 | } | |
06f976ca SZ |
1079 | ifi->ifi_family = AF_UNSPEC; |
1080 | ifi->ifi_index = index; | |
75d09f83 DL |
1081 | |
1082 | if (nla_put_u32(nlmsg, IFLA_MTU, mtu)) | |
1083 | goto out; | |
1084 | ||
1085 | err = netlink_transaction(&nlh, nlmsg, answer); | |
75d09f83 DL |
1086 | out: |
1087 | netlink_close(&nlh); | |
1088 | nlmsg_free(nlmsg); | |
1089 | nlmsg_free(answer); | |
1090 | return err; | |
1091 | } | |
1092 | ||
d472214b | 1093 | int lxc_netdev_up(const char *name) |
0ad19a3f | 1094 | { |
d472214b | 1095 | return netdev_set_flag(name, IFF_UP); |
0ad19a3f | 1096 | } |
1097 | ||
d472214b | 1098 | int lxc_netdev_down(const char *name) |
0ad19a3f | 1099 | { |
d472214b | 1100 | return netdev_set_flag(name, 0); |
0ad19a3f | 1101 | } |
1102 | ||
497353b6 | 1103 | int lxc_veth_create(const char *name1, const char *name2) |
0ad19a3f | 1104 | { |
ebc73a67 | 1105 | int err, len; |
06f976ca | 1106 | struct ifinfomsg *ifi; |
ebc73a67 | 1107 | struct nl_handler nlh; |
0ad19a3f | 1108 | struct rtattr *nest1, *nest2, *nest3; |
ebc73a67 | 1109 | struct nlmsg *answer = NULL, *nlmsg = NULL; |
0ad19a3f | 1110 | |
3cfc0f3a MN |
1111 | err = netlink_open(&nlh, NETLINK_ROUTE); |
1112 | if (err) | |
1113 | return err; | |
0ad19a3f | 1114 | |
3cfc0f3a | 1115 | err = -EINVAL; |
0ad19a3f | 1116 | len = strlen(name1); |
dae3fdf6 | 1117 | if (len == 1 || len >= IFNAMSIZ) |
0ad19a3f | 1118 | goto out; |
1119 | ||
1120 | len = strlen(name2); | |
dae3fdf6 | 1121 | if (len == 1 || len >= IFNAMSIZ) |
0ad19a3f | 1122 | goto out; |
1123 | ||
3cfc0f3a | 1124 | err = -ENOMEM; |
0ad19a3f | 1125 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1126 | if (!nlmsg) | |
1127 | goto out; | |
1128 | ||
06f976ca | 1129 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1130 | if (!answer) |
1131 | goto out; | |
1132 | ||
06f976ca | 1133 | nlmsg->nlmsghdr->nlmsg_flags = |
ebc73a67 | 1134 | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
1135 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1136 | ||
1137 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
1138 | if (!ifi) |
1139 | goto out; | |
06f976ca | 1140 | ifi->ifi_family = AF_UNSPEC; |
0ad19a3f | 1141 | |
3cfc0f3a | 1142 | err = -EINVAL; |
79e68309 | 1143 | nest1 = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
0ad19a3f | 1144 | if (!nest1) |
1145 | goto out; | |
1146 | ||
1147 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "veth")) | |
1148 | goto out; | |
1149 | ||
1150 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
1151 | if (!nest2) | |
1152 | goto out; | |
1153 | ||
1154 | nest3 = nla_begin_nested(nlmsg, VETH_INFO_PEER); | |
1155 | if (!nest3) | |
1156 | goto out; | |
1157 | ||
06f976ca | 1158 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); |
25a9939b WC |
1159 | if (!ifi) { |
1160 | err = -ENOMEM; | |
06f976ca | 1161 | goto out; |
25a9939b | 1162 | } |
0ad19a3f | 1163 | |
1164 | if (nla_put_string(nlmsg, IFLA_IFNAME, name2)) | |
1165 | goto out; | |
1166 | ||
1167 | nla_end_nested(nlmsg, nest3); | |
0ad19a3f | 1168 | nla_end_nested(nlmsg, nest2); |
0ad19a3f | 1169 | nla_end_nested(nlmsg, nest1); |
1170 | ||
1171 | if (nla_put_string(nlmsg, IFLA_IFNAME, name1)) | |
1172 | goto out; | |
1173 | ||
3cfc0f3a | 1174 | err = netlink_transaction(&nlh, nlmsg, answer); |
0ad19a3f | 1175 | out: |
1176 | netlink_close(&nlh); | |
1177 | nlmsg_free(answer); | |
1178 | nlmsg_free(nlmsg); | |
1179 | return err; | |
1180 | } | |
1181 | ||
ebc73a67 | 1182 | /* TODO: merge with lxc_macvlan_create */ |
7c11d57a | 1183 | int lxc_vlan_create(const char *master, const char *name, unsigned short vlanid) |
26c39028 | 1184 | { |
ebc73a67 | 1185 | int err, len, lindex; |
06f976ca | 1186 | struct ifinfomsg *ifi; |
ebc73a67 | 1187 | struct nl_handler nlh; |
26c39028 | 1188 | struct rtattr *nest, *nest2; |
ebc73a67 | 1189 | struct nlmsg *answer = NULL, *nlmsg = NULL; |
26c39028 | 1190 | |
3cfc0f3a MN |
1191 | err = netlink_open(&nlh, NETLINK_ROUTE); |
1192 | if (err) | |
1193 | return err; | |
26c39028 | 1194 | |
3cfc0f3a | 1195 | err = -EINVAL; |
26c39028 | 1196 | len = strlen(master); |
dae3fdf6 | 1197 | if (len == 1 || len >= IFNAMSIZ) |
26c39028 JHS |
1198 | goto err3; |
1199 | ||
1200 | len = strlen(name); | |
dae3fdf6 | 1201 | if (len == 1 || len >= IFNAMSIZ) |
26c39028 JHS |
1202 | goto err3; |
1203 | ||
3cfc0f3a | 1204 | err = -ENOMEM; |
26c39028 JHS |
1205 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1206 | if (!nlmsg) | |
1207 | goto err3; | |
1208 | ||
06f976ca | 1209 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
26c39028 JHS |
1210 | if (!answer) |
1211 | goto err2; | |
1212 | ||
3cfc0f3a | 1213 | err = -EINVAL; |
26c39028 JHS |
1214 | lindex = if_nametoindex(master); |
1215 | if (!lindex) | |
1216 | goto err1; | |
1217 | ||
06f976ca | 1218 | nlmsg->nlmsghdr->nlmsg_flags = |
ebc73a67 | 1219 | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
1220 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1221 | ||
1222 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
1223 | if (!ifi) { |
1224 | err = -ENOMEM; | |
1225 | goto err1; | |
1226 | } | |
06f976ca | 1227 | ifi->ifi_family = AF_UNSPEC; |
26c39028 | 1228 | |
79e68309 | 1229 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
26c39028 JHS |
1230 | if (!nest) |
1231 | goto err1; | |
1232 | ||
1233 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "vlan")) | |
1234 | goto err1; | |
1235 | ||
1236 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
1237 | if (!nest2) | |
1238 | goto err1; | |
e892973e | 1239 | |
26c39028 JHS |
1240 | if (nla_put_u16(nlmsg, IFLA_VLAN_ID, vlanid)) |
1241 | goto err1; | |
e892973e | 1242 | |
26c39028 | 1243 | nla_end_nested(nlmsg, nest2); |
26c39028 JHS |
1244 | nla_end_nested(nlmsg, nest); |
1245 | ||
1246 | if (nla_put_u32(nlmsg, IFLA_LINK, lindex)) | |
1247 | goto err1; | |
1248 | ||
1249 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
1250 | goto err1; | |
1251 | ||
3cfc0f3a | 1252 | err = netlink_transaction(&nlh, nlmsg, answer); |
26c39028 JHS |
1253 | err1: |
1254 | nlmsg_free(answer); | |
1255 | err2: | |
1256 | nlmsg_free(nlmsg); | |
1257 | err3: | |
1258 | netlink_close(&nlh); | |
1259 | return err; | |
1260 | } | |
1261 | ||
e892973e | 1262 | int lxc_macvlan_create(const char *master, const char *name, int mode) |
0ad19a3f | 1263 | { |
ebc73a67 | 1264 | int err, index, len; |
06f976ca | 1265 | struct ifinfomsg *ifi; |
ebc73a67 | 1266 | struct nl_handler nlh; |
e892973e | 1267 | struct rtattr *nest, *nest2; |
ebc73a67 | 1268 | struct nlmsg *answer = NULL, *nlmsg = NULL; |
0ad19a3f | 1269 | |
3cfc0f3a MN |
1270 | err = netlink_open(&nlh, NETLINK_ROUTE); |
1271 | if (err) | |
1272 | return err; | |
0ad19a3f | 1273 | |
3cfc0f3a | 1274 | err = -EINVAL; |
0ad19a3f | 1275 | len = strlen(master); |
dae3fdf6 | 1276 | if (len == 1 || len >= IFNAMSIZ) |
0ad19a3f | 1277 | goto out; |
1278 | ||
1279 | len = strlen(name); | |
dae3fdf6 | 1280 | if (len == 1 || len >= IFNAMSIZ) |
0ad19a3f | 1281 | goto out; |
1282 | ||
3cfc0f3a | 1283 | err = -ENOMEM; |
0ad19a3f | 1284 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1285 | if (!nlmsg) | |
1286 | goto out; | |
1287 | ||
06f976ca | 1288 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1289 | if (!answer) |
1290 | goto out; | |
1291 | ||
3cfc0f3a | 1292 | err = -EINVAL; |
0ad19a3f | 1293 | index = if_nametoindex(master); |
1294 | if (!index) | |
1295 | goto out; | |
1296 | ||
06f976ca | 1297 | nlmsg->nlmsghdr->nlmsg_flags = |
ebc73a67 | 1298 | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL | NLM_F_ACK; |
06f976ca SZ |
1299 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWLINK; |
1300 | ||
1301 | ifi = nlmsg_reserve(nlmsg, sizeof(struct ifinfomsg)); | |
25a9939b WC |
1302 | if (!ifi) { |
1303 | err = -ENOMEM; | |
1304 | goto out; | |
1305 | } | |
06f976ca | 1306 | ifi->ifi_family = AF_UNSPEC; |
0ad19a3f | 1307 | |
79e68309 | 1308 | nest = nla_begin_nested(nlmsg, IFLA_LINKINFO); |
0ad19a3f | 1309 | if (!nest) |
1310 | goto out; | |
1311 | ||
1312 | if (nla_put_string(nlmsg, IFLA_INFO_KIND, "macvlan")) | |
1313 | goto out; | |
1314 | ||
e892973e DL |
1315 | if (mode) { |
1316 | nest2 = nla_begin_nested(nlmsg, IFLA_INFO_DATA); | |
1317 | if (!nest2) | |
1318 | goto out; | |
1319 | ||
1320 | if (nla_put_u32(nlmsg, IFLA_MACVLAN_MODE, mode)) | |
1321 | goto out; | |
1322 | ||
1323 | nla_end_nested(nlmsg, nest2); | |
1324 | } | |
1325 | ||
0ad19a3f | 1326 | nla_end_nested(nlmsg, nest); |
1327 | ||
1328 | if (nla_put_u32(nlmsg, IFLA_LINK, index)) | |
1329 | goto out; | |
1330 | ||
1331 | if (nla_put_string(nlmsg, IFLA_IFNAME, name)) | |
1332 | goto out; | |
1333 | ||
3cfc0f3a | 1334 | err = netlink_transaction(&nlh, nlmsg, answer); |
0ad19a3f | 1335 | out: |
1336 | netlink_close(&nlh); | |
1337 | nlmsg_free(answer); | |
1338 | nlmsg_free(nlmsg); | |
1339 | return err; | |
1340 | } | |
1341 | ||
1342 | static int proc_sys_net_write(const char *path, const char *value) | |
1343 | { | |
ebc73a67 CB |
1344 | int fd; |
1345 | int err = 0; | |
0ad19a3f | 1346 | |
1347 | fd = open(path, O_WRONLY); | |
1348 | if (fd < 0) | |
1349 | return -errno; | |
1350 | ||
f640cf46 | 1351 | if (lxc_write_nointr(fd, value, strlen(value)) < 0) |
0ad19a3f | 1352 | err = -errno; |
1353 | ||
1354 | close(fd); | |
1355 | return err; | |
1356 | } | |
1357 | ||
0ad19a3f | 1358 | static int neigh_proxy_set(const char *ifname, int family, int flag) |
1359 | { | |
9ba8130c | 1360 | int ret; |
ebc73a67 | 1361 | char path[MAXPATHLEN]; |
0ad19a3f | 1362 | |
1363 | if (family != AF_INET && family != AF_INET6) | |
3cfc0f3a | 1364 | return -EINVAL; |
0ad19a3f | 1365 | |
9ba8130c | 1366 | ret = snprintf(path, MAXPATHLEN, "/proc/sys/net/%s/conf/%s/%s", |
ebc73a67 CB |
1367 | family == AF_INET ? "ipv4" : "ipv6", ifname, |
1368 | family == AF_INET ? "proxy_arp" : "proxy_ndp"); | |
1369 | if (ret < 0 || (size_t)ret >= MAXPATHLEN) | |
9ba8130c | 1370 | return -E2BIG; |
0ad19a3f | 1371 | |
ebc73a67 | 1372 | return proc_sys_net_write(path, flag ? "1" : "0"); |
0ad19a3f | 1373 | } |
1374 | ||
497353b6 | 1375 | int lxc_neigh_proxy_on(const char *name, int family) |
0ad19a3f | 1376 | { |
1377 | return neigh_proxy_set(name, family, 1); | |
1378 | } | |
1379 | ||
497353b6 | 1380 | int lxc_neigh_proxy_off(const char *name, int family) |
0ad19a3f | 1381 | { |
1382 | return neigh_proxy_set(name, family, 0); | |
1383 | } | |
1384 | ||
1385 | int lxc_convert_mac(char *macaddr, struct sockaddr *sockaddr) | |
1386 | { | |
1f1b18e7 DL |
1387 | int i = 0; |
1388 | unsigned val; | |
ebc73a67 CB |
1389 | char c; |
1390 | unsigned char *data; | |
1f1b18e7 DL |
1391 | |
1392 | sockaddr->sa_family = ARPHRD_ETHER; | |
1393 | data = (unsigned char *)sockaddr->sa_data; | |
1394 | ||
1395 | while ((*macaddr != '\0') && (i < ETH_ALEN)) { | |
ebc73a67 CB |
1396 | c = *macaddr++; |
1397 | if (isdigit(c)) | |
1398 | val = c - '0'; | |
1399 | else if (c >= 'a' && c <= 'f') | |
1400 | val = c - 'a' + 10; | |
1401 | else if (c >= 'A' && c <= 'F') | |
1402 | val = c - 'A' + 10; | |
1403 | else | |
1404 | return -EINVAL; | |
1405 | ||
1406 | val <<= 4; | |
1407 | c = *macaddr; | |
1408 | if (isdigit(c)) | |
1409 | val |= c - '0'; | |
1410 | else if (c >= 'a' && c <= 'f') | |
1411 | val |= c - 'a' + 10; | |
1412 | else if (c >= 'A' && c <= 'F') | |
1413 | val |= c - 'A' + 10; | |
1414 | else if (c == ':' || c == 0) | |
1415 | val >>= 4; | |
1416 | else | |
1417 | return -EINVAL; | |
1418 | if (c != 0) | |
1419 | macaddr++; | |
1420 | *data++ = (unsigned char)(val & 0377); | |
1421 | i++; | |
1422 | ||
1423 | if (*macaddr == ':') | |
1424 | macaddr++; | |
0ad19a3f | 1425 | } |
0ad19a3f | 1426 | |
1f1b18e7 | 1427 | return 0; |
0ad19a3f | 1428 | } |
1429 | ||
ebc73a67 CB |
1430 | static int ip_addr_add(int family, int ifindex, void *addr, void *bcast, |
1431 | void *acast, int prefix) | |
0ad19a3f | 1432 | { |
ebc73a67 | 1433 | int addrlen, err; |
06f976ca | 1434 | struct ifaddrmsg *ifa; |
ebc73a67 CB |
1435 | struct nl_handler nlh; |
1436 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
0ad19a3f | 1437 | |
ebc73a67 CB |
1438 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
1439 | : sizeof(struct in6_addr); | |
4bf1968d | 1440 | |
3cfc0f3a MN |
1441 | err = netlink_open(&nlh, NETLINK_ROUTE); |
1442 | if (err) | |
1443 | return err; | |
0ad19a3f | 1444 | |
3cfc0f3a | 1445 | err = -ENOMEM; |
0ad19a3f | 1446 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); |
1447 | if (!nlmsg) | |
1448 | goto out; | |
1449 | ||
06f976ca | 1450 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
0ad19a3f | 1451 | if (!answer) |
1452 | goto out; | |
1453 | ||
06f976ca | 1454 | nlmsg->nlmsghdr->nlmsg_flags = |
ebc73a67 | 1455 | NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
06f976ca SZ |
1456 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWADDR; |
1457 | ||
1458 | ifa = nlmsg_reserve(nlmsg, sizeof(struct ifaddrmsg)); | |
acf47e1b | 1459 | if (!ifa) |
25a9939b | 1460 | goto out; |
06f976ca SZ |
1461 | ifa->ifa_prefixlen = prefix; |
1462 | ifa->ifa_index = ifindex; | |
1463 | ifa->ifa_family = family; | |
1464 | ifa->ifa_scope = 0; | |
acf47e1b | 1465 | |
3cfc0f3a | 1466 | err = -EINVAL; |
4bf1968d | 1467 | if (nla_put_buffer(nlmsg, IFA_LOCAL, addr, addrlen)) |
0ad19a3f | 1468 | goto out; |
1469 | ||
4bf1968d | 1470 | if (nla_put_buffer(nlmsg, IFA_ADDRESS, addr, addrlen)) |
0ad19a3f | 1471 | goto out; |
1472 | ||
d8948a52 | 1473 | if (nla_put_buffer(nlmsg, IFA_BROADCAST, bcast, addrlen)) |
1f1b18e7 DL |
1474 | goto out; |
1475 | ||
ebc73a67 | 1476 | /* TODO: multicast, anycast with ipv6 */ |
7ddc8f24 | 1477 | err = -EPROTONOSUPPORT; |
79881dc6 DL |
1478 | if (family == AF_INET6 && |
1479 | (memcmp(bcast, &in6addr_any, sizeof(in6addr_any)) || | |
1480 | memcmp(acast, &in6addr_any, sizeof(in6addr_any)))) | |
1f1b18e7 | 1481 | goto out; |
0ad19a3f | 1482 | |
3cfc0f3a | 1483 | err = netlink_transaction(&nlh, nlmsg, answer); |
0ad19a3f | 1484 | out: |
1485 | netlink_close(&nlh); | |
1486 | nlmsg_free(answer); | |
1487 | nlmsg_free(nlmsg); | |
1488 | return err; | |
1489 | } | |
1490 | ||
1f1b18e7 | 1491 | int lxc_ipv6_addr_add(int ifindex, struct in6_addr *addr, |
ebc73a67 CB |
1492 | struct in6_addr *mcast, struct in6_addr *acast, |
1493 | int prefix) | |
1f1b18e7 DL |
1494 | { |
1495 | return ip_addr_add(AF_INET6, ifindex, addr, mcast, acast, prefix); | |
1496 | } | |
1497 | ||
ebc73a67 CB |
1498 | int lxc_ipv4_addr_add(int ifindex, struct in_addr *addr, struct in_addr *bcast, |
1499 | int prefix) | |
1f1b18e7 DL |
1500 | { |
1501 | return ip_addr_add(AF_INET, ifindex, addr, bcast, NULL, prefix); | |
1502 | } | |
1503 | ||
ebc73a67 CB |
1504 | /* Find an IFA_LOCAL (or IFA_ADDRESS if not IFA_LOCAL is present) address from |
1505 | * the given RTM_NEWADDR message. Allocates memory for the address and stores | |
1506 | * that pointer in *res (so res should be an in_addr** or in6_addr**). | |
19a26f82 | 1507 | */ |
6ce39620 CB |
1508 | #pragma GCC diagnostic push |
1509 | #pragma GCC diagnostic ignored "-Wcast-align" | |
1510 | ||
ebc73a67 CB |
1511 | static int ifa_get_local_ip(int family, struct nlmsghdr *msg, void **res) |
1512 | { | |
1513 | int addrlen; | |
06f976ca SZ |
1514 | struct ifaddrmsg *ifa = NLMSG_DATA(msg); |
1515 | struct rtattr *rta = IFA_RTA(ifa); | |
1516 | int attr_len = NLMSG_PAYLOAD(msg, sizeof(struct ifaddrmsg)); | |
19a26f82 | 1517 | |
06f976ca | 1518 | if (ifa->ifa_family != family) |
19a26f82 MK |
1519 | return 0; |
1520 | ||
ebc73a67 CB |
1521 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
1522 | : sizeof(struct in6_addr); | |
19a26f82 MK |
1523 | |
1524 | /* Loop over the rtattr's in this message */ | |
ebc73a67 | 1525 | while (RTA_OK(rta, attr_len)) { |
19a26f82 | 1526 | /* Found a local address for the requested interface, |
ebc73a67 CB |
1527 | * return it. |
1528 | */ | |
1529 | if (rta->rta_type == IFA_LOCAL || | |
1530 | rta->rta_type == IFA_ADDRESS) { | |
1531 | /* Sanity check. The family check above should make sure | |
1532 | * the address length is correct, but check here just in | |
1533 | * case. | |
1534 | */ | |
19a26f82 MK |
1535 | if (RTA_PAYLOAD(rta) != addrlen) |
1536 | return -1; | |
1537 | ||
ebc73a67 CB |
1538 | /* We might have found an IFA_ADDRESS before, which we |
1539 | * now overwrite with an IFA_LOCAL. | |
1540 | */ | |
dd66e5ad | 1541 | if (!*res) { |
19a26f82 | 1542 | *res = malloc(addrlen); |
dd66e5ad DE |
1543 | if (!*res) |
1544 | return -1; | |
1545 | } | |
19a26f82 MK |
1546 | |
1547 | memcpy(*res, RTA_DATA(rta), addrlen); | |
19a26f82 MK |
1548 | if (rta->rta_type == IFA_LOCAL) |
1549 | break; | |
1550 | } | |
1551 | rta = RTA_NEXT(rta, attr_len); | |
1552 | } | |
1553 | return 0; | |
1554 | } | |
1555 | ||
6ce39620 CB |
1556 | #pragma GCC diagnostic pop |
1557 | ||
19a26f82 MK |
1558 | static int ip_addr_get(int family, int ifindex, void **res) |
1559 | { | |
ebc73a67 | 1560 | int answer_len, err; |
06f976ca | 1561 | struct ifaddrmsg *ifa; |
ebc73a67 | 1562 | struct nl_handler nlh; |
19a26f82 | 1563 | struct nlmsghdr *msg; |
ebc73a67 CB |
1564 | int readmore = 0, recv_len = 0; |
1565 | struct nlmsg *answer = NULL, *nlmsg = NULL; | |
19a26f82 MK |
1566 | |
1567 | err = netlink_open(&nlh, NETLINK_ROUTE); | |
1568 | if (err) | |
1569 | return err; | |
1570 | ||
1571 | err = -ENOMEM; | |
1572 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1573 | if (!nlmsg) | |
1574 | goto out; | |
1575 | ||
06f976ca | 1576 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
19a26f82 MK |
1577 | if (!answer) |
1578 | goto out; | |
1579 | ||
ebc73a67 CB |
1580 | /* Save the answer buffer length, since it will be overwritten on the |
1581 | * first receive (and we might need to receive more than once). | |
1582 | */ | |
06f976ca SZ |
1583 | answer_len = answer->nlmsghdr->nlmsg_len; |
1584 | ||
ebc73a67 | 1585 | nlmsg->nlmsghdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ROOT; |
06f976ca | 1586 | nlmsg->nlmsghdr->nlmsg_type = RTM_GETADDR; |
19a26f82 | 1587 | |
06f976ca | 1588 | ifa = nlmsg_reserve(nlmsg, sizeof(struct ifaddrmsg)); |
25a9939b WC |
1589 | if (!ifa) |
1590 | goto out; | |
06f976ca | 1591 | ifa->ifa_family = family; |
19a26f82 | 1592 | |
ebc73a67 CB |
1593 | /* Send the request for addresses, which returns all addresses on all |
1594 | * interfaces. | |
1595 | */ | |
19a26f82 MK |
1596 | err = netlink_send(&nlh, nlmsg); |
1597 | if (err < 0) | |
1598 | goto out; | |
19a26f82 | 1599 | |
6ce39620 CB |
1600 | #pragma GCC diagnostic push |
1601 | #pragma GCC diagnostic ignored "-Wcast-align" | |
1602 | ||
19a26f82 MK |
1603 | do { |
1604 | /* Restore the answer buffer length, it might have been | |
ebc73a67 CB |
1605 | * overwritten by a previous receive. |
1606 | */ | |
06f976ca | 1607 | answer->nlmsghdr->nlmsg_len = answer_len; |
19a26f82 | 1608 | |
ebc73a67 | 1609 | /* Get the (next) batch of reply messages. */ |
19a26f82 MK |
1610 | err = netlink_rcv(&nlh, answer); |
1611 | if (err < 0) | |
1612 | goto out; | |
1613 | ||
1614 | recv_len = err; | |
1615 | err = 0; | |
1616 | ||
ebc73a67 | 1617 | /* Satisfy the typing for the netlink macros. */ |
06f976ca | 1618 | msg = answer->nlmsghdr; |
19a26f82 MK |
1619 | |
1620 | while (NLMSG_OK(msg, recv_len)) { | |
ebc73a67 | 1621 | /* Stop reading if we see an error message. */ |
19a26f82 | 1622 | if (msg->nlmsg_type == NLMSG_ERROR) { |
ebc73a67 CB |
1623 | struct nlmsgerr *errmsg = |
1624 | (struct nlmsgerr *)NLMSG_DATA(msg); | |
19a26f82 MK |
1625 | err = errmsg->error; |
1626 | goto out; | |
1627 | } | |
1628 | ||
ebc73a67 | 1629 | /* Stop reading if we see a NLMSG_DONE message. */ |
19a26f82 MK |
1630 | if (msg->nlmsg_type == NLMSG_DONE) { |
1631 | readmore = 0; | |
1632 | break; | |
1633 | } | |
1634 | ||
1635 | if (msg->nlmsg_type != RTM_NEWADDR) { | |
1636 | err = -1; | |
1637 | goto out; | |
1638 | } | |
1639 | ||
06f976ca SZ |
1640 | ifa = (struct ifaddrmsg *)NLMSG_DATA(msg); |
1641 | if (ifa->ifa_index == ifindex) { | |
1642 | if (ifa_get_local_ip(family, msg, res) < 0) { | |
51e7a874 SG |
1643 | err = -1; |
1644 | goto out; | |
1645 | } | |
1646 | ||
ebc73a67 | 1647 | /* Found a result, stop searching. */ |
19a26f82 MK |
1648 | if (*res) |
1649 | goto out; | |
1650 | } | |
1651 | ||
ebc73a67 CB |
1652 | /* Keep reading more data from the socket if the last |
1653 | * message had the NLF_F_MULTI flag set. | |
1654 | */ | |
19a26f82 MK |
1655 | readmore = (msg->nlmsg_flags & NLM_F_MULTI); |
1656 | ||
ebc73a67 | 1657 | /* Look at the next message received in this buffer. */ |
19a26f82 MK |
1658 | msg = NLMSG_NEXT(msg, recv_len); |
1659 | } | |
1660 | } while (readmore); | |
1661 | ||
6ce39620 CB |
1662 | #pragma GCC diagnostic pop |
1663 | ||
19a26f82 | 1664 | /* If we end up here, we didn't find any result, so signal an |
ebc73a67 CB |
1665 | * error. |
1666 | */ | |
19a26f82 MK |
1667 | err = -1; |
1668 | ||
1669 | out: | |
1670 | netlink_close(&nlh); | |
1671 | nlmsg_free(answer); | |
1672 | nlmsg_free(nlmsg); | |
1673 | return err; | |
1674 | } | |
1675 | ||
1676 | int lxc_ipv6_addr_get(int ifindex, struct in6_addr **res) | |
1677 | { | |
ebc73a67 | 1678 | return ip_addr_get(AF_INET6, ifindex, (void **)res); |
19a26f82 MK |
1679 | } |
1680 | ||
ebc73a67 | 1681 | int lxc_ipv4_addr_get(int ifindex, struct in_addr **res) |
19a26f82 | 1682 | { |
ebc73a67 | 1683 | return ip_addr_get(AF_INET, ifindex, (void **)res); |
19a26f82 MK |
1684 | } |
1685 | ||
f8fee0e2 MK |
1686 | static int ip_gateway_add(int family, int ifindex, void *gw) |
1687 | { | |
ebc73a67 | 1688 | int addrlen, err; |
f8fee0e2 | 1689 | struct nl_handler nlh; |
06f976ca | 1690 | struct rtmsg *rt; |
ebc73a67 | 1691 | struct nlmsg *answer = NULL, *nlmsg = NULL; |
f8fee0e2 | 1692 | |
ebc73a67 CB |
1693 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
1694 | : sizeof(struct in6_addr); | |
f8fee0e2 MK |
1695 | |
1696 | err = netlink_open(&nlh, NETLINK_ROUTE); | |
1697 | if (err) | |
1698 | return err; | |
1699 | ||
1700 | err = -ENOMEM; | |
1701 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1702 | if (!nlmsg) | |
1703 | goto out; | |
1704 | ||
06f976ca | 1705 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
f8fee0e2 MK |
1706 | if (!answer) |
1707 | goto out; | |
1708 | ||
06f976ca | 1709 | nlmsg->nlmsghdr->nlmsg_flags = |
ebc73a67 | 1710 | NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
06f976ca SZ |
1711 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWROUTE; |
1712 | ||
1713 | rt = nlmsg_reserve(nlmsg, sizeof(struct rtmsg)); | |
25a9939b WC |
1714 | if (!rt) |
1715 | goto out; | |
06f976ca SZ |
1716 | rt->rtm_family = family; |
1717 | rt->rtm_table = RT_TABLE_MAIN; | |
1718 | rt->rtm_scope = RT_SCOPE_UNIVERSE; | |
1719 | rt->rtm_protocol = RTPROT_BOOT; | |
1720 | rt->rtm_type = RTN_UNICAST; | |
f8fee0e2 | 1721 | /* "default" destination */ |
06f976ca | 1722 | rt->rtm_dst_len = 0; |
f8fee0e2 MK |
1723 | |
1724 | err = -EINVAL; | |
1725 | if (nla_put_buffer(nlmsg, RTA_GATEWAY, gw, addrlen)) | |
1726 | goto out; | |
1727 | ||
1728 | /* Adding the interface index enables the use of link-local | |
ebc73a67 CB |
1729 | * addresses for the gateway. |
1730 | */ | |
f8fee0e2 MK |
1731 | if (nla_put_u32(nlmsg, RTA_OIF, ifindex)) |
1732 | goto out; | |
1733 | ||
1734 | err = netlink_transaction(&nlh, nlmsg, answer); | |
1735 | out: | |
1736 | netlink_close(&nlh); | |
1737 | nlmsg_free(answer); | |
1738 | nlmsg_free(nlmsg); | |
1739 | return err; | |
1740 | } | |
1741 | ||
1742 | int lxc_ipv4_gateway_add(int ifindex, struct in_addr *gw) | |
1743 | { | |
1744 | return ip_gateway_add(AF_INET, ifindex, gw); | |
1745 | } | |
1746 | ||
1747 | int lxc_ipv6_gateway_add(int ifindex, struct in6_addr *gw) | |
1748 | { | |
1749 | return ip_gateway_add(AF_INET6, ifindex, gw); | |
1750 | } | |
1751 | ||
77dcf03a GL |
1752 | static int ip_route_dest_add(int family, int ifindex, void *dest) |
1753 | { | |
ebc73a67 | 1754 | int addrlen, err; |
77dcf03a | 1755 | struct nl_handler nlh; |
06f976ca | 1756 | struct rtmsg *rt; |
ebc73a67 | 1757 | struct nlmsg *answer = NULL, *nlmsg = NULL; |
acf47e1b | 1758 | |
ebc73a67 CB |
1759 | addrlen = family == AF_INET ? sizeof(struct in_addr) |
1760 | : sizeof(struct in6_addr); | |
acf47e1b | 1761 | |
77dcf03a GL |
1762 | err = netlink_open(&nlh, NETLINK_ROUTE); |
1763 | if (err) | |
1764 | return err; | |
acf47e1b | 1765 | |
77dcf03a GL |
1766 | err = -ENOMEM; |
1767 | nlmsg = nlmsg_alloc(NLMSG_GOOD_SIZE); | |
1768 | if (!nlmsg) | |
1769 | goto out; | |
acf47e1b | 1770 | |
06f976ca | 1771 | answer = nlmsg_alloc_reserve(NLMSG_GOOD_SIZE); |
77dcf03a GL |
1772 | if (!answer) |
1773 | goto out; | |
acf47e1b | 1774 | |
06f976ca | 1775 | nlmsg->nlmsghdr->nlmsg_flags = |
ebc73a67 | 1776 | NLM_F_ACK | NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; |
06f976ca SZ |
1777 | nlmsg->nlmsghdr->nlmsg_type = RTM_NEWROUTE; |
1778 | ||
1779 | rt = nlmsg_reserve(nlmsg, sizeof(struct rtmsg)); | |
25a9939b WC |
1780 | if (!rt) |
1781 | goto out; | |
06f976ca SZ |
1782 | rt->rtm_family = family; |
1783 | rt->rtm_table = RT_TABLE_MAIN; | |
1784 | rt->rtm_scope = RT_SCOPE_LINK; | |
1785 | rt->rtm_protocol = RTPROT_BOOT; | |
1786 | rt->rtm_type = RTN_UNICAST; | |
ebc73a67 | 1787 | rt->rtm_dst_len = addrlen * 8; |
acf47e1b | 1788 | |
77dcf03a GL |
1789 | err = -EINVAL; |
1790 | if (nla_put_buffer(nlmsg, RTA_DST, dest, addrlen)) | |
1791 | goto out; | |
1792 | if (nla_put_u32(nlmsg, RTA_OIF, ifindex)) | |
1793 | goto out; | |
1794 | err = netlink_transaction(&nlh, nlmsg, answer); | |
1795 | out: | |
1796 | netlink_close(&nlh); | |
1797 | nlmsg_free(answer); | |
1798 | nlmsg_free(nlmsg); | |
1799 | return err; | |
1800 | } | |
1801 | ||
1802 | int lxc_ipv4_dest_add(int ifindex, struct in_addr *dest) | |
1803 | { | |
1804 | return ip_route_dest_add(AF_INET, ifindex, dest); | |
1805 | } | |
1806 | ||
1807 | int lxc_ipv6_dest_add(int ifindex, struct in6_addr *dest) | |
1808 | { | |
1809 | return ip_route_dest_add(AF_INET6, ifindex, dest); | |
1810 | } | |
1811 | ||
581c75e7 | 1812 | bool is_ovs_bridge(const char *bridge) |
0d204771 | 1813 | { |
ebc73a67 | 1814 | int ret; |
0d204771 | 1815 | struct stat sb; |
ebc73a67 | 1816 | char brdirname[22 + IFNAMSIZ + 1] = {0}; |
0d204771 | 1817 | |
ebc73a67 CB |
1818 | ret = snprintf(brdirname, 22 + IFNAMSIZ + 1, "/sys/class/net/%s/bridge", |
1819 | bridge); | |
1820 | if (ret < 0 || (size_t)ret >= 22 + IFNAMSIZ + 1) | |
1821 | return false; | |
1822 | ||
1823 | ret = stat(brdirname, &sb); | |
1824 | if (ret < 0 && errno == ENOENT) | |
0d204771 | 1825 | return true; |
ebc73a67 | 1826 | |
0d204771 SH |
1827 | return false; |
1828 | } | |
1829 | ||
581c75e7 CB |
1830 | struct ovs_veth_args { |
1831 | const char *bridge; | |
1832 | const char *nic; | |
1833 | }; | |
1834 | ||
cb0dc11b CB |
1835 | /* Called from a background thread - when nic goes away, remove it from the |
1836 | * bridge. | |
c43cbc04 | 1837 | */ |
581c75e7 | 1838 | static int lxc_ovs_delete_port_exec(void *data) |
c43cbc04 | 1839 | { |
581c75e7 | 1840 | struct ovs_veth_args *args = data; |
cb0dc11b | 1841 | |
581c75e7 CB |
1842 | execlp("ovs-vsctl", "ovs-vsctl", "del-port", args->bridge, args->nic, |
1843 | (char *)NULL); | |
1844 | return -1; | |
c43cbc04 SH |
1845 | } |
1846 | ||
581c75e7 | 1847 | int lxc_ovs_delete_port(const char *bridge, const char *nic) |
0d204771 | 1848 | { |
c43cbc04 | 1849 | int ret; |
581c75e7 CB |
1850 | char cmd_output[MAXPATHLEN]; |
1851 | struct ovs_veth_args args; | |
6ad22d06 | 1852 | |
581c75e7 CB |
1853 | args.bridge = bridge; |
1854 | args.nic = nic; | |
1855 | ret = run_command(cmd_output, sizeof(cmd_output), | |
1856 | lxc_ovs_delete_port_exec, (void *)&args); | |
1857 | if (ret < 0) { | |
1858 | ERROR("Failed to delete \"%s\" from openvswitch bridge \"%s\": " | |
1859 | "%s", bridge, nic, cmd_output); | |
6ad22d06 | 1860 | return -1; |
581c75e7 | 1861 | } |
0d204771 | 1862 | |
581c75e7 CB |
1863 | return 0; |
1864 | } | |
ebc73a67 | 1865 | |
581c75e7 CB |
1866 | static int lxc_ovs_attach_bridge_exec(void *data) |
1867 | { | |
1868 | struct ovs_veth_args *args = data; | |
ebc73a67 | 1869 | |
581c75e7 CB |
1870 | execlp("ovs-vsctl", "ovs-vsctl", "add-port", args->bridge, args->nic, |
1871 | (char *)NULL); | |
1872 | return -1; | |
1873 | } | |
ebc73a67 | 1874 | |
581c75e7 CB |
1875 | static int lxc_ovs_attach_bridge(const char *bridge, const char *nic) |
1876 | { | |
1877 | int ret; | |
1878 | char cmd_output[MAXPATHLEN]; | |
1879 | struct ovs_veth_args args; | |
ebc73a67 | 1880 | |
581c75e7 CB |
1881 | args.bridge = bridge; |
1882 | args.nic = nic; | |
1883 | ret = run_command(cmd_output, sizeof(cmd_output), | |
1884 | lxc_ovs_attach_bridge_exec, (void *)&args); | |
1885 | if (ret < 0) { | |
1886 | ERROR("Failed to attach \"%s\" to openvswitch bridge \"%s\": %s", | |
1887 | bridge, nic, cmd_output); | |
1888 | return -1; | |
c43cbc04 | 1889 | } |
0d204771 | 1890 | |
581c75e7 | 1891 | return 0; |
0d204771 | 1892 | } |
0d204771 | 1893 | |
581c75e7 | 1894 | int lxc_bridge_attach(const char *bridge, const char *ifname) |
0ad19a3f | 1895 | { |
ebc73a67 | 1896 | int err, fd, index; |
9de31d5a | 1897 | size_t retlen; |
0ad19a3f | 1898 | struct ifreq ifr; |
1899 | ||
dae3fdf6 | 1900 | if (strlen(ifname) >= IFNAMSIZ) |
3cfc0f3a | 1901 | return -EINVAL; |
0ad19a3f | 1902 | |
1903 | index = if_nametoindex(ifname); | |
1904 | if (!index) | |
3cfc0f3a | 1905 | return -EINVAL; |
0ad19a3f | 1906 | |
0d204771 | 1907 | if (is_ovs_bridge(bridge)) |
581c75e7 | 1908 | return lxc_ovs_attach_bridge(bridge, ifname); |
0d204771 | 1909 | |
0ad19a3f | 1910 | fd = socket(AF_INET, SOCK_STREAM, 0); |
1911 | if (fd < 0) | |
3cfc0f3a | 1912 | return -errno; |
0ad19a3f | 1913 | |
9de31d5a | 1914 | retlen = strlcpy(ifr.ifr_name, bridge, IFNAMSIZ); |
42cc4083 CB |
1915 | if (retlen >= IFNAMSIZ) { |
1916 | close(fd); | |
9de31d5a | 1917 | return -E2BIG; |
42cc4083 | 1918 | } |
9de31d5a | 1919 | |
ebc73a67 | 1920 | ifr.ifr_name[IFNAMSIZ - 1] = '\0'; |
0ad19a3f | 1921 | ifr.ifr_ifindex = index; |
7d163508 | 1922 | err = ioctl(fd, SIOCBRADDIF, &ifr); |
0ad19a3f | 1923 | close(fd); |
3cfc0f3a MN |
1924 | if (err) |
1925 | err = -errno; | |
0ad19a3f | 1926 | |
1927 | return err; | |
1928 | } | |
72d0e1cb | 1929 | |
ebc73a67 | 1930 | static const char *const lxc_network_types[LXC_NET_MAXCONFTYPE + 1] = { |
b343592b | 1931 | [LXC_NET_EMPTY] = "empty", |
72d0e1cb SG |
1932 | [LXC_NET_VETH] = "veth", |
1933 | [LXC_NET_MACVLAN] = "macvlan", | |
72d0e1cb | 1934 | [LXC_NET_PHYS] = "phys", |
b343592b BP |
1935 | [LXC_NET_VLAN] = "vlan", |
1936 | [LXC_NET_NONE] = "none", | |
72d0e1cb SG |
1937 | }; |
1938 | ||
1939 | const char *lxc_net_type_to_str(int type) | |
1940 | { | |
1941 | if (type < 0 || type > LXC_NET_MAXCONFTYPE) | |
1942 | return NULL; | |
ebc73a67 | 1943 | |
72d0e1cb SG |
1944 | return lxc_network_types[type]; |
1945 | } | |
8befa924 | 1946 | |
ebc73a67 | 1947 | static const char padchar[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; |
a0265685 | 1948 | |
966e9f1f | 1949 | char *lxc_mkifname(char *template) |
a0265685 | 1950 | { |
2d7bf744 | 1951 | int ret; |
b1e44ed1 | 1952 | struct netns_ifaddrs *ifa, *ifaddr; |
966e9f1f CB |
1953 | char name[IFNAMSIZ]; |
1954 | bool exists = false; | |
1955 | size_t i = 0; | |
280cc35f | 1956 | #ifdef HAVE_RAND_R |
1957 | unsigned int seed; | |
1958 | ||
1959 | seed = randseed(false); | |
1960 | #else | |
1961 | ||
1962 | (void)randseed(true); | |
1963 | #endif | |
a0265685 | 1964 | |
535e8859 CB |
1965 | if (strlen(template) >= IFNAMSIZ) |
1966 | return NULL; | |
1967 | ||
ebc73a67 | 1968 | /* Get all the network interfaces. */ |
b1e44ed1 | 1969 | ret = netns_getifaddrs(&ifaddr, -1, &(bool){false}); |
2d7bf744 | 1970 | if (ret < 0) { |
6d1400b5 | 1971 | SYSERROR("Failed to get network interfaces"); |
2d7bf744 CB |
1972 | return NULL; |
1973 | } | |
a0265685 | 1974 | |
ebc73a67 CB |
1975 | /* Generate random names until we find one that doesn't exist. */ |
1976 | while (true) { | |
966e9f1f | 1977 | name[0] = '\0'; |
94b1cade | 1978 | (void)strlcpy(name, template, IFNAMSIZ); |
a0265685 | 1979 | |
966e9f1f | 1980 | exists = false; |
280cc35f | 1981 | |
a0265685 SG |
1982 | for (i = 0; i < strlen(name); i++) { |
1983 | if (name[i] == 'X') { | |
1984 | #ifdef HAVE_RAND_R | |
966e9f1f | 1985 | name[i] = padchar[rand_r(&seed) % (strlen(padchar) - 1)]; |
a0265685 SG |
1986 | #else |
1987 | name[i] = padchar[rand() % (strlen(padchar) - 1)]; | |
1988 | #endif | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { | |
966e9f1f CB |
1993 | if (!strcmp(ifa->ifa_name, name)) { |
1994 | exists = true; | |
a0265685 SG |
1995 | break; |
1996 | } | |
1997 | } | |
1998 | ||
966e9f1f | 1999 | if (!exists) |
a0265685 | 2000 | break; |
a0265685 SG |
2001 | } |
2002 | ||
b1e44ed1 | 2003 | netns_freeifaddrs(ifaddr); |
94b1cade DJ |
2004 | (void)strlcpy(template, name, strlen(template) + 1); |
2005 | ||
2006 | return template; | |
a0265685 SG |
2007 | } |
2008 | ||
8befa924 SH |
2009 | int setup_private_host_hw_addr(char *veth1) |
2010 | { | |
ebc73a67 | 2011 | int err, sockfd; |
8befa924 | 2012 | struct ifreq ifr; |
8befa924 | 2013 | |
8befa924 | 2014 | sockfd = socket(AF_INET, SOCK_DGRAM, 0); |
8befa924 SH |
2015 | if (sockfd < 0) |
2016 | return -errno; | |
2017 | ||
ebc73a67 | 2018 | err = snprintf((char *)ifr.ifr_name, IFNAMSIZ, "%s", veth1); |
87c6e5db DJ |
2019 | if (err < 0 || (size_t)err >= IFNAMSIZ) { |
2020 | close(sockfd); | |
ebc73a67 | 2021 | return -E2BIG; |
87c6e5db | 2022 | } |
ebc73a67 | 2023 | |
8befa924 SH |
2024 | err = ioctl(sockfd, SIOCGIFHWADDR, &ifr); |
2025 | if (err < 0) { | |
8befa924 | 2026 | close(sockfd); |
8befa924 SH |
2027 | return -errno; |
2028 | } | |
2029 | ||
2030 | ifr.ifr_hwaddr.sa_data[0] = 0xfe; | |
2031 | err = ioctl(sockfd, SIOCSIFHWADDR, &ifr); | |
8befa924 | 2032 | close(sockfd); |
8befa924 SH |
2033 | if (err < 0) |
2034 | return -errno; | |
2035 | ||
2036 | return 0; | |
2037 | } | |
811ef482 CB |
2038 | |
2039 | int lxc_find_gateway_addresses(struct lxc_handler *handler) | |
2040 | { | |
2041 | struct lxc_list *network = &handler->conf->network; | |
2042 | struct lxc_list *iterator; | |
2043 | struct lxc_netdev *netdev; | |
2044 | int link_index; | |
2045 | ||
2046 | lxc_list_for_each(iterator, network) { | |
2047 | netdev = iterator->elem; | |
2048 | ||
2049 | if (!netdev->ipv4_gateway_auto && !netdev->ipv6_gateway_auto) | |
2050 | continue; | |
2051 | ||
2052 | if (netdev->type != LXC_NET_VETH && netdev->type != LXC_NET_MACVLAN) { | |
2053 | ERROR("Automatic gateway detection is only supported " | |
2054 | "for veth and macvlan"); | |
2055 | return -1; | |
2056 | } | |
2057 | ||
de4855a8 | 2058 | if (netdev->link[0] == '\0') { |
811ef482 CB |
2059 | ERROR("Automatic gateway detection needs a link interface"); |
2060 | return -1; | |
2061 | } | |
2062 | ||
2063 | link_index = if_nametoindex(netdev->link); | |
2064 | if (!link_index) | |
2065 | return -EINVAL; | |
2066 | ||
2067 | if (netdev->ipv4_gateway_auto) { | |
2068 | if (lxc_ipv4_addr_get(link_index, &netdev->ipv4_gateway)) { | |
2069 | ERROR("Failed to automatically find ipv4 gateway " | |
2070 | "address from link interface \"%s\"", netdev->link); | |
2071 | return -1; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | if (netdev->ipv6_gateway_auto) { | |
2076 | if (lxc_ipv6_addr_get(link_index, &netdev->ipv6_gateway)) { | |
2077 | ERROR("Failed to automatically find ipv6 gateway " | |
2078 | "address from link interface \"%s\"", netdev->link); | |
2079 | return -1; | |
2080 | } | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | return 0; | |
2085 | } | |
2086 | ||
2087 | #define LXC_USERNIC_PATH LIBEXECDIR "/lxc/lxc-user-nic" | |
f0ecc19d | 2088 | static int lxc_create_network_unpriv_exec(const char *lxcpath, const char *lxcname, |
4d781681 | 2089 | struct lxc_netdev *netdev, pid_t pid, unsigned int hooks_version) |
811ef482 CB |
2090 | { |
2091 | int ret; | |
2092 | pid_t child; | |
2093 | int bytes, pipefd[2]; | |
2094 | char *token, *saveptr = NULL; | |
095ead80 | 2095 | char netdev_link[IFNAMSIZ]; |
811ef482 | 2096 | char buffer[MAXPATHLEN] = {0}; |
94b1cade | 2097 | size_t retlen; |
811ef482 CB |
2098 | |
2099 | if (netdev->type != LXC_NET_VETH) { | |
2100 | ERROR("Network type %d not support for unprivileged use", netdev->type); | |
2101 | return -1; | |
2102 | } | |
2103 | ||
2104 | ret = pipe(pipefd); | |
2105 | if (ret < 0) { | |
2106 | SYSERROR("Failed to create pipe"); | |
2107 | return -1; | |
2108 | } | |
2109 | ||
2110 | child = fork(); | |
2111 | if (child < 0) { | |
2112 | SYSERROR("Failed to create new process"); | |
2113 | close(pipefd[0]); | |
2114 | close(pipefd[1]); | |
2115 | return -1; | |
2116 | } | |
2117 | ||
2118 | if (child == 0) { | |
2119 | int ret; | |
9de31d5a | 2120 | size_t retlen; |
8335fd40 | 2121 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
811ef482 CB |
2122 | |
2123 | close(pipefd[0]); | |
2124 | ||
2125 | ret = dup2(pipefd[1], STDOUT_FILENO); | |
2126 | if (ret >= 0) | |
2127 | ret = dup2(pipefd[1], STDERR_FILENO); | |
2128 | close(pipefd[1]); | |
2129 | if (ret < 0) { | |
2130 | SYSERROR("Failed to duplicate std{err,out} file descriptor"); | |
78070056 | 2131 | _exit(EXIT_FAILURE); |
811ef482 CB |
2132 | } |
2133 | ||
de4855a8 | 2134 | if (netdev->link[0] != '\0') |
9de31d5a | 2135 | retlen = strlcpy(netdev_link, netdev->link, IFNAMSIZ); |
811ef482 | 2136 | else |
9de31d5a CB |
2137 | retlen = strlcpy(netdev_link, "none", IFNAMSIZ); |
2138 | if (retlen >= IFNAMSIZ) { | |
2139 | SYSERROR("Invalid network device name"); | |
2140 | _exit(EXIT_FAILURE); | |
2141 | } | |
811ef482 | 2142 | |
8335fd40 CB |
2143 | ret = snprintf(pidstr, sizeof(pidstr), "%d", pid); |
2144 | if (ret < 0 || ret >= sizeof(pidstr)) | |
78070056 | 2145 | _exit(EXIT_FAILURE); |
8335fd40 | 2146 | pidstr[sizeof(pidstr) - 1] = '\0'; |
811ef482 CB |
2147 | |
2148 | INFO("Execing lxc-user-nic create %s %s %s veth %s %s", lxcpath, | |
2149 | lxcname, pidstr, netdev_link, | |
de4855a8 CB |
2150 | netdev->name[0] != '\0' ? netdev->name : "(null)"); |
2151 | if (netdev->name[0] != '\0') | |
811ef482 CB |
2152 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "create", |
2153 | lxcpath, lxcname, pidstr, "veth", netdev_link, | |
2154 | netdev->name, (char *)NULL); | |
2155 | else | |
2156 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "create", | |
2157 | lxcpath, lxcname, pidstr, "veth", netdev_link, | |
2158 | (char *)NULL); | |
2159 | SYSERROR("Failed to execute lxc-user-nic"); | |
78070056 | 2160 | _exit(EXIT_FAILURE); |
811ef482 CB |
2161 | } |
2162 | ||
2163 | /* close the write-end of the pipe */ | |
2164 | close(pipefd[1]); | |
2165 | ||
c72cda4e | 2166 | bytes = lxc_read_nointr(pipefd[0], &buffer, MAXPATHLEN); |
811ef482 | 2167 | if (bytes < 0) { |
74c6e2b0 | 2168 | SYSERROR("Failed to read from pipe file descriptor"); |
811ef482 | 2169 | close(pipefd[0]); |
6b9f82a9 CB |
2170 | } else { |
2171 | buffer[bytes - 1] = '\0'; | |
811ef482 | 2172 | } |
811ef482 CB |
2173 | |
2174 | ret = wait_for_pid(child); | |
2175 | close(pipefd[0]); | |
6b9f82a9 | 2176 | if (ret != 0 || bytes < 0) { |
811ef482 CB |
2177 | ERROR("lxc-user-nic failed to configure requested network: %s", |
2178 | buffer[0] != '\0' ? buffer : "(null)"); | |
2179 | return -1; | |
2180 | } | |
2181 | TRACE("Received output \"%s\" from lxc-user-nic", buffer); | |
2182 | ||
2183 | /* netdev->name */ | |
2184 | token = strtok_r(buffer, ":", &saveptr); | |
74c6e2b0 CB |
2185 | if (!token) { |
2186 | ERROR("Failed to parse lxc-user-nic output"); | |
811ef482 | 2187 | return -1; |
74c6e2b0 | 2188 | } |
811ef482 | 2189 | |
def4def6 CB |
2190 | memset(netdev->name, 0, IFNAMSIZ); |
2191 | memcpy(netdev->name, token, IFNAMSIZ - 1); | |
811ef482 | 2192 | |
74c6e2b0 | 2193 | /* netdev->ifindex */ |
811ef482 | 2194 | token = strtok_r(NULL, ":", &saveptr); |
74c6e2b0 CB |
2195 | if (!token) { |
2196 | ERROR("Failed to parse lxc-user-nic output"); | |
811ef482 | 2197 | return -1; |
74c6e2b0 | 2198 | } |
811ef482 | 2199 | |
74c6e2b0 CB |
2200 | ret = lxc_safe_int(token, &netdev->ifindex); |
2201 | if (ret < 0) { | |
6d1400b5 | 2202 | errno = -ret; |
2203 | SYSERROR("Failed to convert string \"%s\" to integer", token); | |
811ef482 CB |
2204 | return -1; |
2205 | } | |
2206 | ||
74c6e2b0 | 2207 | /* netdev->priv.veth_attr.veth1 */ |
811ef482 | 2208 | token = strtok_r(NULL, ":", &saveptr); |
74c6e2b0 CB |
2209 | if (!token) { |
2210 | ERROR("Failed to parse lxc-user-nic output"); | |
811ef482 | 2211 | return -1; |
74c6e2b0 | 2212 | } |
811ef482 | 2213 | |
94b1cade DJ |
2214 | retlen = strlcpy(netdev->priv.veth_attr.veth1, token, IFNAMSIZ); |
2215 | if (retlen >= IFNAMSIZ) { | |
74c6e2b0 CB |
2216 | ERROR("Host side veth device name returned by lxc-user-nic is " |
2217 | "too long"); | |
2218 | return -E2BIG; | |
2219 | } | |
74c6e2b0 CB |
2220 | |
2221 | /* netdev->priv.veth_attr.ifindex */ | |
2222 | token = strtok_r(NULL, ":", &saveptr); | |
2223 | if (!token) { | |
2224 | ERROR("Failed to parse lxc-user-nic output"); | |
2225 | return -1; | |
2226 | } | |
2227 | ||
2228 | ret = lxc_safe_int(token, &netdev->priv.veth_attr.ifindex); | |
811ef482 | 2229 | if (ret < 0) { |
6d1400b5 | 2230 | errno = -ret; |
2231 | SYSERROR("Failed to convert string \"%s\" to integer", token); | |
811ef482 CB |
2232 | return -1; |
2233 | } | |
2234 | ||
4d781681 | 2235 | if (netdev->upscript) { |
2236 | char *argv[] = { | |
2237 | "veth", | |
2238 | netdev->link, | |
2239 | netdev->priv.veth_attr.veth1, | |
2240 | NULL, | |
2241 | }; | |
2242 | ||
2243 | ret = run_script_argv(lxcname, | |
2244 | hooks_version, "net", | |
2245 | netdev->upscript, "up", argv); | |
2246 | if (ret < 0) | |
2247 | return -1; | |
2248 | } | |
2249 | ||
811ef482 CB |
2250 | return 0; |
2251 | } | |
2252 | ||
f0ecc19d | 2253 | static int lxc_delete_network_unpriv_exec(const char *lxcpath, const char *lxcname, |
1bd8d726 CB |
2254 | struct lxc_netdev *netdev, |
2255 | const char *netns_path) | |
811ef482 CB |
2256 | { |
2257 | int bytes, ret; | |
2258 | pid_t child; | |
2259 | int pipefd[2]; | |
2260 | char buffer[MAXPATHLEN] = {0}; | |
2261 | ||
2262 | if (netdev->type != LXC_NET_VETH) { | |
2263 | ERROR("Network type %d not support for unprivileged use", netdev->type); | |
2264 | return -1; | |
2265 | } | |
2266 | ||
2267 | ret = pipe(pipefd); | |
2268 | if (ret < 0) { | |
2269 | SYSERROR("Failed to create pipe"); | |
2270 | return -1; | |
2271 | } | |
2272 | ||
2273 | child = fork(); | |
2274 | if (child < 0) { | |
2275 | SYSERROR("Failed to create new process"); | |
2276 | close(pipefd[0]); | |
2277 | close(pipefd[1]); | |
2278 | return -1; | |
2279 | } | |
2280 | ||
2281 | if (child == 0) { | |
8843fde4 | 2282 | char *hostveth; |
811ef482 | 2283 | int ret; |
811ef482 CB |
2284 | |
2285 | close(pipefd[0]); | |
2286 | ||
2287 | ret = dup2(pipefd[1], STDOUT_FILENO); | |
2288 | if (ret >= 0) | |
2289 | ret = dup2(pipefd[1], STDERR_FILENO); | |
2290 | close(pipefd[1]); | |
2291 | if (ret < 0) { | |
2292 | SYSERROR("Failed to duplicate std{err,out} file descriptor"); | |
a30b9023 | 2293 | _exit(EXIT_FAILURE); |
811ef482 CB |
2294 | } |
2295 | ||
8843fde4 CB |
2296 | if (netdev->priv.veth_attr.pair[0] != '\0') |
2297 | hostveth = netdev->priv.veth_attr.pair; | |
2298 | else | |
2299 | hostveth = netdev->priv.veth_attr.veth1; | |
2300 | if (hostveth[0] == '\0') { | |
74c6e2b0 | 2301 | SYSERROR("Host side veth device name is missing"); |
a30b9023 | 2302 | _exit(EXIT_FAILURE); |
74c6e2b0 CB |
2303 | } |
2304 | ||
de4855a8 | 2305 | if (netdev->link[0] == '\0') { |
811ef482 | 2306 | SYSERROR("Network link for network device \"%s\" is " |
74c6e2b0 | 2307 | "missing", netdev->priv.veth_attr.veth1); |
a30b9023 | 2308 | _exit(EXIT_FAILURE); |
74c6e2b0 | 2309 | } |
811ef482 | 2310 | |
811ef482 | 2311 | INFO("Execing lxc-user-nic delete %s %s %s veth %s %s", lxcpath, |
8843fde4 | 2312 | lxcname, netns_path, netdev->link, hostveth); |
811ef482 | 2313 | execlp(LXC_USERNIC_PATH, LXC_USERNIC_PATH, "delete", lxcpath, |
8843fde4 CB |
2314 | lxcname, netns_path, "veth", netdev->link, hostveth, |
2315 | (char *)NULL); | |
811ef482 | 2316 | SYSERROR("Failed to exec lxc-user-nic."); |
a30b9023 | 2317 | _exit(EXIT_FAILURE); |
811ef482 CB |
2318 | } |
2319 | ||
2320 | close(pipefd[1]); | |
2321 | ||
c72cda4e | 2322 | bytes = lxc_read_nointr(pipefd[0], &buffer, MAXPATHLEN); |
811ef482 CB |
2323 | if (bytes < 0) { |
2324 | SYSERROR("Failed to read from pipe file descriptor."); | |
2325 | close(pipefd[0]); | |
6b9f82a9 CB |
2326 | } else { |
2327 | buffer[bytes - 1] = '\0'; | |
811ef482 | 2328 | } |
811ef482 | 2329 | |
6b9f82a9 CB |
2330 | ret = wait_for_pid(child); |
2331 | close(pipefd[0]); | |
2332 | if (ret != 0 || bytes < 0) { | |
811ef482 CB |
2333 | ERROR("lxc-user-nic failed to delete requested network: %s", |
2334 | buffer[0] != '\0' ? buffer : "(null)"); | |
811ef482 CB |
2335 | return -1; |
2336 | } | |
2337 | ||
811ef482 CB |
2338 | return 0; |
2339 | } | |
2340 | ||
1bd8d726 CB |
2341 | bool lxc_delete_network_unpriv(struct lxc_handler *handler) |
2342 | { | |
2343 | int ret; | |
2344 | struct lxc_list *iterator; | |
2345 | struct lxc_list *network = &handler->conf->network; | |
2346 | /* strlen("/proc/") = 6 | |
2347 | * + | |
8335fd40 | 2348 | * INTTYPE_TO_STRLEN(pid_t) |
1bd8d726 CB |
2349 | * + |
2350 | * strlen("/fd/") = 4 | |
2351 | * + | |
8335fd40 | 2352 | * INTTYPE_TO_STRLEN(int) |
1bd8d726 CB |
2353 | * + |
2354 | * \0 | |
2355 | */ | |
8335fd40 | 2356 | char netns_path[6 + INTTYPE_TO_STRLEN(pid_t) + 4 + INTTYPE_TO_STRLEN(int) + 1]; |
1bd8d726 CB |
2357 | |
2358 | *netns_path = '\0'; | |
2359 | ||
28d9e29e | 2360 | if (handler->nsfd[LXC_NS_NET] < 0) { |
1bd8d726 CB |
2361 | DEBUG("Cannot not guarantee safe deletion of network devices. " |
2362 | "Manual cleanup maybe needed"); | |
2363 | return false; | |
2364 | } | |
2365 | ||
2366 | ret = snprintf(netns_path, sizeof(netns_path), "/proc/%d/fd/%d", | |
0059379f | 2367 | lxc_raw_getpid(), handler->nsfd[LXC_NS_NET]); |
1bd8d726 CB |
2368 | if (ret < 0 || ret >= sizeof(netns_path)) |
2369 | return false; | |
2370 | ||
2371 | lxc_list_for_each(iterator, network) { | |
2372 | char *hostveth = NULL; | |
2373 | struct lxc_netdev *netdev = iterator->elem; | |
2374 | ||
2375 | /* We can only delete devices whose ifindex we have. If we don't | |
2376 | * have the index it means that we didn't create it. | |
2377 | */ | |
2378 | if (!netdev->ifindex) | |
2379 | continue; | |
2380 | ||
2381 | if (netdev->type == LXC_NET_PHYS) { | |
2382 | ret = lxc_netdev_rename_by_index(netdev->ifindex, | |
2383 | netdev->link); | |
2384 | if (ret < 0) | |
2385 | WARN("Failed to rename interface with index %d " | |
2386 | "to its initial name \"%s\"", | |
2387 | netdev->ifindex, netdev->link); | |
2388 | else | |
2389 | TRACE("Renamed interface with index %d to its " | |
2390 | "initial name \"%s\"", | |
2391 | netdev->ifindex, netdev->link); | |
66a7c406 | 2392 | goto clear_ifindices; |
1bd8d726 CB |
2393 | } |
2394 | ||
2395 | ret = netdev_deconf[netdev->type](handler, netdev); | |
2396 | if (ret < 0) | |
2397 | WARN("Failed to deconfigure network device"); | |
2398 | ||
2399 | if (netdev->type != LXC_NET_VETH) | |
66a7c406 | 2400 | goto clear_ifindices; |
1bd8d726 | 2401 | |
c869be20 | 2402 | if (netdev->link[0] == '\0' || !is_ovs_bridge(netdev->link)) |
66a7c406 | 2403 | goto clear_ifindices; |
1bd8d726 | 2404 | |
8843fde4 CB |
2405 | if (netdev->priv.veth_attr.pair[0] != '\0') |
2406 | hostveth = netdev->priv.veth_attr.pair; | |
2407 | else | |
2408 | hostveth = netdev->priv.veth_attr.veth1; | |
2409 | if (hostveth[0] == '\0') | |
66a7c406 | 2410 | goto clear_ifindices; |
8843fde4 | 2411 | |
1bd8d726 CB |
2412 | ret = lxc_delete_network_unpriv_exec(handler->lxcpath, |
2413 | handler->name, netdev, | |
2414 | netns_path); | |
2415 | if (ret < 0) { | |
1bd8d726 | 2416 | WARN("Failed to remove port \"%s\" from openvswitch " |
8843fde4 | 2417 | "bridge \"%s\"", hostveth, netdev->link); |
66a7c406 | 2418 | goto clear_ifindices; |
1bd8d726 CB |
2419 | } |
2420 | INFO("Removed interface \"%s\" from \"%s\"", hostveth, | |
2421 | netdev->link); | |
66a7c406 CB |
2422 | |
2423 | clear_ifindices: | |
2424 | /* We need to clear any ifindeces we recorded so liblxc won't | |
2425 | * have cached stale data which would cause it to fail on reboot | |
2426 | * we're we don't re-read the on-disk config file. | |
2427 | */ | |
2428 | netdev->ifindex = 0; | |
2429 | if (netdev->type == LXC_NET_PHYS) { | |
2430 | netdev->priv.phys_attr.ifindex = 0; | |
2431 | } else if (netdev->type == LXC_NET_VETH) { | |
2432 | netdev->priv.veth_attr.veth1[0] = '\0'; | |
2433 | netdev->priv.veth_attr.ifindex = 0; | |
2434 | } | |
1bd8d726 CB |
2435 | } |
2436 | ||
bb84beda | 2437 | return true; |
1bd8d726 CB |
2438 | } |
2439 | ||
811ef482 CB |
2440 | int lxc_create_network_priv(struct lxc_handler *handler) |
2441 | { | |
811ef482 CB |
2442 | struct lxc_list *iterator; |
2443 | struct lxc_list *network = &handler->conf->network; | |
2444 | ||
d0fbc7ba | 2445 | if (!handler->am_root) |
811ef482 CB |
2446 | return 0; |
2447 | ||
2448 | lxc_list_for_each(iterator, network) { | |
2449 | struct lxc_netdev *netdev = iterator->elem; | |
2450 | ||
2451 | if (netdev->type < 0 || netdev->type > LXC_NET_MAXCONFTYPE) { | |
2452 | ERROR("Invalid network configuration type %d", netdev->type); | |
2453 | return -1; | |
2454 | } | |
2455 | ||
2456 | if (netdev_conf[netdev->type](handler, netdev)) { | |
2457 | ERROR("Failed to create network device"); | |
2458 | return -1; | |
2459 | } | |
2460 | ||
2461 | } | |
2462 | ||
2463 | return 0; | |
2464 | } | |
2465 | ||
f0ecc19d | 2466 | int lxc_network_move_created_netdev_priv(const char *lxcpath, const char *lxcname, |
74c6e2b0 | 2467 | struct lxc_list *network, pid_t pid) |
811ef482 | 2468 | { |
535e8859 | 2469 | int ret; |
811ef482 CB |
2470 | char ifname[IFNAMSIZ]; |
2471 | struct lxc_list *iterator; | |
2472 | ||
e0010464 | 2473 | if (am_guest_unpriv()) |
74c6e2b0 | 2474 | return 0; |
811ef482 CB |
2475 | |
2476 | lxc_list_for_each(iterator, network) { | |
2477 | struct lxc_netdev *netdev = iterator->elem; | |
2478 | ||
811ef482 CB |
2479 | if (!netdev->ifindex) |
2480 | continue; | |
2481 | ||
2482 | /* retrieve the name of the interface */ | |
2483 | if (!if_indextoname(netdev->ifindex, ifname)) { | |
2484 | ERROR("No interface corresponding to ifindex \"%d\"", | |
2485 | netdev->ifindex); | |
2486 | return -1; | |
2487 | } | |
2488 | ||
535e8859 CB |
2489 | ret = lxc_netdev_move_by_name(ifname, pid, NULL); |
2490 | if (ret) { | |
6d1400b5 | 2491 | errno = -ret; |
2492 | SYSERROR("Failed to move network device \"%s\" to " | |
2493 | "network namespace %d", ifname, pid); | |
811ef482 CB |
2494 | return -1; |
2495 | } | |
2496 | ||
2497 | DEBUG("Moved network device \"%s\"/\"%s\" to network namespace " | |
790255cf | 2498 | "of %d", |
535e8859 | 2499 | ifname, netdev->name[0] != '\0' ? netdev->name : "(null)", |
811ef482 CB |
2500 | pid); |
2501 | } | |
2502 | ||
2503 | return 0; | |
2504 | } | |
2505 | ||
f0ecc19d | 2506 | int lxc_create_network_unpriv(const char *lxcpath, const char *lxcname, |
4d781681 | 2507 | struct lxc_list *network, pid_t pid, unsigned int hooks_version) |
74c6e2b0 CB |
2508 | { |
2509 | struct lxc_list *iterator; | |
2510 | ||
e0010464 | 2511 | if (!am_guest_unpriv()) |
74c6e2b0 CB |
2512 | return 0; |
2513 | ||
2514 | lxc_list_for_each(iterator, network) { | |
2515 | struct lxc_netdev *netdev = iterator->elem; | |
2516 | ||
2517 | if (netdev->type == LXC_NET_EMPTY) | |
2518 | continue; | |
2519 | ||
2520 | if (netdev->type == LXC_NET_NONE) | |
2521 | continue; | |
2522 | ||
2523 | if (netdev->type != LXC_NET_VETH) { | |
2524 | ERROR("Networks of type %s are not supported by " | |
2525 | "unprivileged containers", | |
2526 | lxc_net_type_to_str(netdev->type)); | |
2527 | return -1; | |
2528 | } | |
2529 | ||
2530 | if (netdev->mtu) | |
2531 | INFO("mtu ignored due to insufficient privilege"); | |
2532 | ||
4d781681 | 2533 | if (lxc_create_network_unpriv_exec(lxcpath, lxcname, netdev, pid, hooks_version)) |
74c6e2b0 CB |
2534 | return -1; |
2535 | } | |
2536 | ||
2537 | return 0; | |
2538 | } | |
2539 | ||
1bd8d726 | 2540 | bool lxc_delete_network_priv(struct lxc_handler *handler) |
811ef482 CB |
2541 | { |
2542 | int ret; | |
2543 | struct lxc_list *iterator; | |
2544 | struct lxc_list *network = &handler->conf->network; | |
1bd8d726 | 2545 | |
811ef482 CB |
2546 | lxc_list_for_each(iterator, network) { |
2547 | char *hostveth = NULL; | |
2548 | struct lxc_netdev *netdev = iterator->elem; | |
2549 | ||
2550 | /* We can only delete devices whose ifindex we have. If we don't | |
2551 | * have the index it means that we didn't create it. | |
2552 | */ | |
2553 | if (!netdev->ifindex) | |
2554 | continue; | |
2555 | ||
2556 | if (netdev->type == LXC_NET_PHYS) { | |
2557 | ret = lxc_netdev_rename_by_index(netdev->ifindex, netdev->link); | |
2558 | if (ret < 0) | |
2559 | WARN("Failed to rename interface with index %d " | |
b809f232 CB |
2560 | "from \"%s\" to its initial name \"%s\"", |
2561 | netdev->ifindex, netdev->name, netdev->link); | |
811ef482 | 2562 | else |
29589196 CB |
2563 | TRACE("Renamed interface with index %d from " |
2564 | "\"%s\" to its initial name \"%s\"", | |
2565 | netdev->ifindex, netdev->name, | |
2566 | netdev->link); | |
66a7c406 | 2567 | goto clear_ifindices; |
811ef482 CB |
2568 | } |
2569 | ||
2570 | ret = netdev_deconf[netdev->type](handler, netdev); | |
2571 | if (ret < 0) | |
2572 | WARN("Failed to deconfigure network device"); | |
2573 | ||
2574 | /* Recent kernels remove the virtual interfaces when the network | |
2575 | * namespace is destroyed but in case we did not move the | |
2576 | * interface to the network namespace, we have to destroy it. | |
2577 | */ | |
1bd8d726 CB |
2578 | ret = lxc_netdev_delete_by_index(netdev->ifindex); |
2579 | if (-ret == ENODEV) { | |
2580 | INFO("Interface \"%s\" with index %d already " | |
52845118 CB |
2581 | "deleted or existing in different network " |
2582 | "namespace", | |
2583 | netdev->name[0] != '\0' ? netdev->name : "(null)", | |
2584 | netdev->ifindex); | |
1bd8d726 | 2585 | } else if (ret < 0) { |
a24c5678 | 2586 | errno = -ret; |
2587 | SYSWARN("Failed to remove interface \"%s\" with index %d", | |
2588 | netdev->name[0] != '\0' ? netdev->name : "(null)", | |
2589 | netdev->ifindex); | |
66a7c406 | 2590 | goto clear_ifindices; |
811ef482 | 2591 | } |
1bd8d726 | 2592 | INFO("Removed interface \"%s\" with index %d", |
52845118 CB |
2593 | netdev->name[0] != '\0' ? netdev->name : "(null)", |
2594 | netdev->ifindex); | |
811ef482 CB |
2595 | |
2596 | if (netdev->type != LXC_NET_VETH) | |
66a7c406 | 2597 | goto clear_ifindices; |
811ef482 | 2598 | |
811ef482 CB |
2599 | /* Explicitly delete host veth device to prevent lingering |
2600 | * devices. We had issues in LXD around this. | |
2601 | */ | |
de4855a8 | 2602 | if (netdev->priv.veth_attr.pair[0] != '\0') |
811ef482 CB |
2603 | hostveth = netdev->priv.veth_attr.pair; |
2604 | else | |
2605 | hostveth = netdev->priv.veth_attr.veth1; | |
de4855a8 | 2606 | if (hostveth[0] == '\0') |
66a7c406 | 2607 | goto clear_ifindices; |
811ef482 CB |
2608 | |
2609 | ret = lxc_netdev_delete_by_name(hostveth); | |
2610 | if (ret < 0) { | |
a24c5678 | 2611 | errno = -ret; |
2612 | SYSWARN("Failed to remove interface \"%s\" from \"%s\"", | |
2613 | hostveth, netdev->link); | |
66a7c406 | 2614 | goto clear_ifindices; |
811ef482 CB |
2615 | } |
2616 | INFO("Removed interface \"%s\" from \"%s\"", hostveth, netdev->link); | |
2617 | ||
c869be20 | 2618 | if (netdev->link[0] == '\0' || !is_ovs_bridge(netdev->link)) { |
811ef482 | 2619 | netdev->priv.veth_attr.veth1[0] = '\0'; |
66a7c406 CB |
2620 | netdev->ifindex = 0; |
2621 | netdev->priv.veth_attr.ifindex = 0; | |
2622 | goto clear_ifindices; | |
811ef482 CB |
2623 | } |
2624 | ||
2625 | /* Delete the openvswitch port. */ | |
2626 | ret = lxc_ovs_delete_port(netdev->link, hostveth); | |
2627 | if (ret < 0) | |
2628 | WARN("Failed to remove port \"%s\" from openvswitch " | |
2629 | "bridge \"%s\"", hostveth, netdev->link); | |
2630 | else | |
2631 | INFO("Removed port \"%s\" from openvswitch bridge \"%s\"", | |
2632 | hostveth, netdev->link); | |
2633 | ||
66a7c406 CB |
2634 | clear_ifindices: |
2635 | /* We need to clear any ifindeces we recorded so liblxc won't | |
2636 | * have cached stale data which would cause it to fail on reboot | |
2637 | * we're we don't re-read the on-disk config file. | |
2638 | */ | |
2639 | netdev->ifindex = 0; | |
2640 | if (netdev->type == LXC_NET_PHYS) { | |
2641 | netdev->priv.phys_attr.ifindex = 0; | |
2642 | } else if (netdev->type == LXC_NET_VETH) { | |
2643 | netdev->priv.veth_attr.veth1[0] = '\0'; | |
2644 | netdev->priv.veth_attr.ifindex = 0; | |
2645 | } | |
811ef482 CB |
2646 | } |
2647 | ||
bb84beda | 2648 | return true; |
811ef482 CB |
2649 | } |
2650 | ||
2651 | int lxc_requests_empty_network(struct lxc_handler *handler) | |
2652 | { | |
2653 | struct lxc_list *network = &handler->conf->network; | |
2654 | struct lxc_list *iterator; | |
2655 | bool found_none = false, found_nic = false; | |
2656 | ||
2657 | if (lxc_list_empty(network)) | |
2658 | return 0; | |
2659 | ||
2660 | lxc_list_for_each(iterator, network) { | |
2661 | struct lxc_netdev *netdev = iterator->elem; | |
2662 | ||
2663 | if (netdev->type == LXC_NET_NONE) | |
2664 | found_none = true; | |
2665 | else | |
2666 | found_nic = true; | |
2667 | } | |
2668 | if (found_none && !found_nic) | |
2669 | return 1; | |
2670 | return 0; | |
2671 | } | |
2672 | ||
2673 | /* try to move physical nics to the init netns */ | |
b809f232 | 2674 | int lxc_restore_phys_nics_to_netns(struct lxc_handler *handler) |
811ef482 CB |
2675 | { |
2676 | int ret; | |
b809f232 | 2677 | int oldfd; |
811ef482 | 2678 | char ifname[IFNAMSIZ]; |
b809f232 | 2679 | struct lxc_list *iterator; |
28d9e29e | 2680 | int netnsfd = handler->nsfd[LXC_NS_NET]; |
b809f232 | 2681 | struct lxc_conf *conf = handler->conf; |
811ef482 | 2682 | |
b809f232 CB |
2683 | /* We need CAP_NET_ADMIN in the parent namespace in order to setns() to |
2684 | * the parent network namespace. We won't have this capability if we are | |
2685 | * unprivileged. | |
2686 | */ | |
d0fbc7ba | 2687 | if (!handler->am_root) |
b809f232 | 2688 | return 0; |
811ef482 | 2689 | |
b809f232 | 2690 | TRACE("Moving physical network devices back to parent network namespace"); |
811ef482 | 2691 | |
0059379f | 2692 | oldfd = lxc_preserve_ns(lxc_raw_getpid(), "net"); |
811ef482 CB |
2693 | if (oldfd < 0) { |
2694 | SYSERROR("Failed to preserve network namespace"); | |
b809f232 | 2695 | return -1; |
811ef482 CB |
2696 | } |
2697 | ||
b809f232 | 2698 | ret = setns(netnsfd, CLONE_NEWNET); |
811ef482 CB |
2699 | if (ret < 0) { |
2700 | SYSERROR("Failed to enter network namespace"); | |
2701 | close(oldfd); | |
b809f232 | 2702 | return -1; |
811ef482 CB |
2703 | } |
2704 | ||
b809f232 CB |
2705 | lxc_list_for_each(iterator, &conf->network) { |
2706 | struct lxc_netdev *netdev = iterator->elem; | |
811ef482 | 2707 | |
b809f232 CB |
2708 | if (netdev->type != LXC_NET_PHYS) |
2709 | continue; | |
2710 | ||
2711 | /* Retrieve the name of the interface in the container's network | |
2712 | * namespace. | |
2713 | */ | |
2714 | if (!if_indextoname(netdev->ifindex, ifname)) { | |
811ef482 | 2715 | WARN("No interface corresponding to ifindex %d", |
b809f232 | 2716 | netdev->ifindex); |
811ef482 CB |
2717 | continue; |
2718 | } | |
b809f232 CB |
2719 | |
2720 | ret = lxc_netdev_move_by_name(ifname, 1, netdev->link); | |
2721 | if (ret < 0) | |
811ef482 CB |
2722 | WARN("Error moving network device \"%s\" back to " |
2723 | "network namespace", ifname); | |
b809f232 CB |
2724 | else |
2725 | TRACE("Moved network device \"%s\" back to network " | |
2726 | "namespace", ifname); | |
811ef482 | 2727 | } |
811ef482 | 2728 | |
b809f232 | 2729 | ret = setns(oldfd, CLONE_NEWNET); |
811ef482 | 2730 | close(oldfd); |
b809f232 CB |
2731 | if (ret < 0) { |
2732 | SYSERROR("Failed to enter network namespace"); | |
2733 | return -1; | |
2734 | } | |
2735 | ||
2736 | return 0; | |
811ef482 CB |
2737 | } |
2738 | ||
2739 | static int setup_hw_addr(char *hwaddr, const char *ifname) | |
2740 | { | |
2741 | struct sockaddr sockaddr; | |
2742 | struct ifreq ifr; | |
6d1400b5 | 2743 | int ret, fd; |
811ef482 CB |
2744 | |
2745 | ret = lxc_convert_mac(hwaddr, &sockaddr); | |
2746 | if (ret) { | |
6d1400b5 | 2747 | errno = -ret; |
2748 | SYSERROR("Mac address \"%s\" conversion failed", hwaddr); | |
811ef482 CB |
2749 | return -1; |
2750 | } | |
2751 | ||
2752 | memcpy(ifr.ifr_name, ifname, IFNAMSIZ); | |
2753 | ifr.ifr_name[IFNAMSIZ-1] = '\0'; | |
2754 | memcpy((char *) &ifr.ifr_hwaddr, (char *) &sockaddr, sizeof(sockaddr)); | |
2755 | ||
2756 | fd = socket(AF_INET, SOCK_DGRAM, 0); | |
2757 | if (fd < 0) | |
2758 | return -1; | |
2759 | ||
2760 | ret = ioctl(fd, SIOCSIFHWADDR, &ifr); | |
811ef482 | 2761 | if (ret) |
6d1400b5 | 2762 | SYSERROR("Failed to perform ioctl"); |
2763 | ||
2764 | close(fd); | |
811ef482 CB |
2765 | |
2766 | DEBUG("Mac address \"%s\" on \"%s\" has been setup", hwaddr, | |
2767 | ifr.ifr_name); | |
2768 | ||
2769 | return ret; | |
2770 | } | |
2771 | ||
2772 | static int setup_ipv4_addr(struct lxc_list *ip, int ifindex) | |
2773 | { | |
2774 | struct lxc_list *iterator; | |
2775 | int err; | |
2776 | ||
2777 | lxc_list_for_each(iterator, ip) { | |
2778 | struct lxc_inetdev *inetdev = iterator->elem; | |
2779 | ||
2780 | err = lxc_ipv4_addr_add(ifindex, &inetdev->addr, | |
2781 | &inetdev->bcast, inetdev->prefix); | |
2782 | if (err) { | |
6d1400b5 | 2783 | errno = -err; |
2784 | SYSERROR("Failed to setup ipv4 address for network device " | |
2785 | "with eifindex %d", ifindex); | |
811ef482 CB |
2786 | return -1; |
2787 | } | |
2788 | } | |
2789 | ||
2790 | return 0; | |
2791 | } | |
2792 | ||
2793 | static int setup_ipv6_addr(struct lxc_list *ip, int ifindex) | |
2794 | { | |
2795 | struct lxc_list *iterator; | |
2796 | int err; | |
2797 | ||
2798 | lxc_list_for_each(iterator, ip) { | |
2799 | struct lxc_inet6dev *inet6dev = iterator->elem; | |
2800 | ||
2801 | err = lxc_ipv6_addr_add(ifindex, &inet6dev->addr, | |
2802 | &inet6dev->mcast, &inet6dev->acast, | |
2803 | inet6dev->prefix); | |
2804 | if (err) { | |
6d1400b5 | 2805 | errno = -err; |
2806 | SYSERROR("Failed to setup ipv6 address for network device " | |
2807 | "with eifindex %d", ifindex); | |
811ef482 CB |
2808 | return -1; |
2809 | } | |
2810 | } | |
2811 | ||
2812 | return 0; | |
2813 | } | |
2814 | ||
2815 | static int lxc_setup_netdev_in_child_namespaces(struct lxc_netdev *netdev) | |
2816 | { | |
2817 | char ifname[IFNAMSIZ]; | |
2818 | int err; | |
2819 | const char *net_type_name; | |
2820 | char *current_ifname = ifname; | |
2821 | ||
2822 | /* empty network namespace */ | |
2823 | if (!netdev->ifindex) { | |
2824 | if (netdev->flags & IFF_UP) { | |
2825 | err = lxc_netdev_up("lo"); | |
2826 | if (err) { | |
6d1400b5 | 2827 | errno = -err; |
2828 | SYSERROR("Failed to set the loopback network device up"); | |
811ef482 CB |
2829 | return -1; |
2830 | } | |
2831 | } | |
2832 | ||
2833 | if (netdev->type == LXC_NET_EMPTY) | |
2834 | return 0; | |
2835 | ||
2836 | if (netdev->type == LXC_NET_NONE) | |
2837 | return 0; | |
2838 | ||
2839 | if (netdev->type != LXC_NET_VETH) { | |
2840 | net_type_name = lxc_net_type_to_str(netdev->type); | |
2841 | ERROR("%s networks are not supported for containers " | |
535e8859 | 2842 | "not setup up by privileged users", net_type_name); |
811ef482 CB |
2843 | return -1; |
2844 | } | |
2845 | ||
2846 | netdev->ifindex = if_nametoindex(netdev->name); | |
2847 | } | |
2848 | ||
2849 | /* get the new ifindex in case of physical netdev */ | |
2850 | if (netdev->type == LXC_NET_PHYS) { | |
2851 | netdev->ifindex = if_nametoindex(netdev->link); | |
2852 | if (!netdev->ifindex) { | |
2853 | ERROR("Failed to get ifindex for network device \"%s\"", | |
2854 | netdev->link); | |
2855 | return -1; | |
2856 | } | |
2857 | } | |
2858 | ||
2859 | /* retrieve the name of the interface */ | |
2860 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
2861 | ERROR("Failed get name for network device with ifindex %d", | |
2862 | netdev->ifindex); | |
2863 | return -1; | |
2864 | } | |
2865 | ||
2866 | /* Default: let the system to choose one interface name. | |
2867 | * When the IFLA_IFNAME attribute is passed something like "<prefix>%d" | |
2868 | * netlink will replace the format specifier with an appropriate index. | |
2869 | */ | |
de4855a8 CB |
2870 | if (netdev->name[0] == '\0') { |
2871 | if (netdev->type == LXC_NET_PHYS) | |
94b1cade | 2872 | (void)strlcpy(netdev->name, netdev->link, IFNAMSIZ); |
de4855a8 | 2873 | else |
94b1cade | 2874 | (void)strlcpy(netdev->name, "eth%d", IFNAMSIZ); |
de4855a8 | 2875 | } |
811ef482 CB |
2876 | |
2877 | /* rename the interface name */ | |
2878 | if (strcmp(ifname, netdev->name) != 0) { | |
2879 | err = lxc_netdev_rename_by_name(ifname, netdev->name); | |
2880 | if (err) { | |
6d1400b5 | 2881 | errno = -err; |
2882 | SYSERROR("Failed to rename network device \"%s\" to \"%s\"", | |
2883 | ifname, netdev->name); | |
811ef482 CB |
2884 | return -1; |
2885 | } | |
2886 | } | |
2887 | ||
2888 | /* Re-read the name of the interface because its name has changed | |
2889 | * and would be automatically allocated by the system | |
2890 | */ | |
2891 | if (!if_indextoname(netdev->ifindex, current_ifname)) { | |
2892 | ERROR("Failed get name for network device with ifindex %d", | |
2893 | netdev->ifindex); | |
2894 | return -1; | |
2895 | } | |
2896 | ||
790255cf CB |
2897 | /* Now update the recorded name of the network device to reflect the |
2898 | * name of the network device in the child's network namespace. We will | |
2899 | * later on send this information back to the parent. | |
2900 | */ | |
94b1cade | 2901 | (void)strlcpy(netdev->name, current_ifname, IFNAMSIZ); |
790255cf | 2902 | |
811ef482 CB |
2903 | /* set a mac address */ |
2904 | if (netdev->hwaddr) { | |
2905 | if (setup_hw_addr(netdev->hwaddr, current_ifname)) { | |
2906 | ERROR("Failed to setup hw address for network device \"%s\"", | |
2907 | current_ifname); | |
2908 | return -1; | |
2909 | } | |
2910 | } | |
2911 | ||
2912 | /* setup ipv4 addresses on the interface */ | |
2913 | if (setup_ipv4_addr(&netdev->ipv4, netdev->ifindex)) { | |
2914 | ERROR("Failed to setup ip addresses for network device \"%s\"", | |
2915 | ifname); | |
2916 | return -1; | |
2917 | } | |
2918 | ||
2919 | /* setup ipv6 addresses on the interface */ | |
2920 | if (setup_ipv6_addr(&netdev->ipv6, netdev->ifindex)) { | |
2921 | ERROR("Failed to setup ipv6 addresses for network device \"%s\"", | |
2922 | ifname); | |
2923 | return -1; | |
2924 | } | |
2925 | ||
2926 | /* set the network device up */ | |
2927 | if (netdev->flags & IFF_UP) { | |
2928 | int err; | |
2929 | ||
2930 | err = lxc_netdev_up(current_ifname); | |
2931 | if (err) { | |
6d1400b5 | 2932 | errno = -err; |
2933 | SYSERROR("Failed to set network device \"%s\" up", | |
2934 | current_ifname); | |
811ef482 CB |
2935 | return -1; |
2936 | } | |
2937 | ||
2938 | /* the network is up, make the loopback up too */ | |
2939 | err = lxc_netdev_up("lo"); | |
2940 | if (err) { | |
6d1400b5 | 2941 | errno = -err; |
2942 | SYSERROR("Failed to set the loopback network device up"); | |
811ef482 CB |
2943 | return -1; |
2944 | } | |
2945 | } | |
2946 | ||
2947 | /* We can only set up the default routes after bringing | |
2948 | * up the interface, sine bringing up the interface adds | |
2949 | * the link-local routes and we can't add a default | |
2950 | * route if the gateway is not reachable. */ | |
2951 | ||
2952 | /* setup ipv4 gateway on the interface */ | |
2953 | if (netdev->ipv4_gateway) { | |
2954 | if (!(netdev->flags & IFF_UP)) { | |
2955 | ERROR("Cannot add ipv4 gateway for network device " | |
2956 | "\"%s\" when not bringing up the interface", ifname); | |
2957 | return -1; | |
2958 | } | |
2959 | ||
2960 | if (lxc_list_empty(&netdev->ipv4)) { | |
2961 | ERROR("Cannot add ipv4 gateway for network device " | |
2962 | "\"%s\" when not assigning an address", ifname); | |
2963 | return -1; | |
2964 | } | |
2965 | ||
2966 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
2967 | if (err) { | |
2968 | err = lxc_ipv4_dest_add(netdev->ifindex, netdev->ipv4_gateway); | |
2969 | if (err) { | |
6d1400b5 | 2970 | errno = -err; |
2971 | SYSERROR("Failed to add ipv4 dest for network device \"%s\"", | |
2972 | ifname); | |
811ef482 CB |
2973 | } |
2974 | ||
2975 | err = lxc_ipv4_gateway_add(netdev->ifindex, netdev->ipv4_gateway); | |
2976 | if (err) { | |
6d1400b5 | 2977 | errno = -err; |
2978 | SYSERROR("Failed to setup ipv4 gateway for network device \"%s\"", | |
2979 | ifname); | |
2980 | ||
811ef482 CB |
2981 | if (netdev->ipv4_gateway_auto) { |
2982 | char buf[INET_ADDRSTRLEN]; | |
2983 | inet_ntop(AF_INET, netdev->ipv4_gateway, buf, sizeof(buf)); | |
2984 | ERROR("Fried to set autodetected ipv4 gateway \"%s\"", buf); | |
2985 | } | |
2986 | return -1; | |
2987 | } | |
2988 | } | |
2989 | } | |
2990 | ||
2991 | /* setup ipv6 gateway on the interface */ | |
2992 | if (netdev->ipv6_gateway) { | |
2993 | if (!(netdev->flags & IFF_UP)) { | |
2994 | ERROR("Cannot add ipv6 gateway for network device " | |
2995 | "\"%s\" when not bringing up the interface", ifname); | |
2996 | return -1; | |
2997 | } | |
2998 | ||
2999 | if (lxc_list_empty(&netdev->ipv6) && !IN6_IS_ADDR_LINKLOCAL(netdev->ipv6_gateway)) { | |
3000 | ERROR("Cannot add ipv6 gateway for network device " | |
3001 | "\"%s\" when not assigning an address", ifname); | |
3002 | return -1; | |
3003 | } | |
3004 | ||
3005 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
3006 | if (err) { | |
3007 | err = lxc_ipv6_dest_add(netdev->ifindex, netdev->ipv6_gateway); | |
3008 | if (err) { | |
6d1400b5 | 3009 | errno = -err; |
3010 | SYSERROR("Failed to add ipv6 dest for network device \"%s\"", | |
3011 | ifname); | |
811ef482 CB |
3012 | } |
3013 | ||
3014 | err = lxc_ipv6_gateway_add(netdev->ifindex, netdev->ipv6_gateway); | |
3015 | if (err) { | |
6d1400b5 | 3016 | errno = -err; |
3017 | SYSERROR("Failed to setup ipv6 gateway for network device \"%s\"", | |
3018 | ifname); | |
3019 | ||
811ef482 CB |
3020 | if (netdev->ipv6_gateway_auto) { |
3021 | char buf[INET6_ADDRSTRLEN]; | |
3022 | inet_ntop(AF_INET6, netdev->ipv6_gateway, buf, sizeof(buf)); | |
3023 | ERROR("Tried to set autodetected ipv6 " | |
3024 | "gateway for network device " | |
3025 | "\"%s\"", buf); | |
3026 | } | |
3027 | return -1; | |
3028 | } | |
3029 | } | |
3030 | } | |
3031 | ||
74c6e2b0 | 3032 | DEBUG("Network device \"%s\" has been setup", current_ifname); |
811ef482 CB |
3033 | |
3034 | return 0; | |
3035 | } | |
3036 | ||
3037 | int lxc_setup_network_in_child_namespaces(const struct lxc_conf *conf, | |
3038 | struct lxc_list *network) | |
3039 | { | |
3040 | struct lxc_list *iterator; | |
3041 | struct lxc_netdev *netdev; | |
3042 | ||
811ef482 CB |
3043 | lxc_list_for_each(iterator, network) { |
3044 | netdev = iterator->elem; | |
3045 | ||
811ef482 CB |
3046 | if (lxc_setup_netdev_in_child_namespaces(netdev)) { |
3047 | ERROR("failed to setup netdev"); | |
3048 | return -1; | |
3049 | } | |
3050 | } | |
3051 | ||
3052 | if (!lxc_list_empty(network)) | |
3053 | INFO("network has been setup"); | |
3054 | ||
3055 | return 0; | |
3056 | } | |
7ab1ba02 CB |
3057 | |
3058 | int lxc_network_send_veth_names_to_child(struct lxc_handler *handler) | |
3059 | { | |
3060 | struct lxc_list *iterator; | |
3061 | struct lxc_list *network = &handler->conf->network; | |
3062 | int data_sock = handler->data_sock[0]; | |
3063 | ||
d0fbc7ba | 3064 | if (handler->am_root) |
7ab1ba02 CB |
3065 | return 0; |
3066 | ||
3067 | lxc_list_for_each(iterator, network) { | |
3068 | int ret; | |
3069 | struct lxc_netdev *netdev = iterator->elem; | |
3070 | ||
3071 | if (netdev->type != LXC_NET_VETH) | |
3072 | continue; | |
3073 | ||
7fbb15ec | 3074 | ret = lxc_send_nointr(data_sock, netdev->name, IFNAMSIZ, MSG_NOSIGNAL); |
7729f8e5 | 3075 | if (ret < 0) |
7ab1ba02 | 3076 | return -1; |
7729f8e5 | 3077 | TRACE("Sent network device name \"%s\" to child", netdev->name); |
7ab1ba02 CB |
3078 | } |
3079 | ||
3080 | return 0; | |
3081 | } | |
3082 | ||
3083 | int lxc_network_recv_veth_names_from_parent(struct lxc_handler *handler) | |
3084 | { | |
3085 | struct lxc_list *iterator; | |
3086 | struct lxc_list *network = &handler->conf->network; | |
3087 | int data_sock = handler->data_sock[1]; | |
3088 | ||
d0fbc7ba | 3089 | if (handler->am_root) |
7ab1ba02 CB |
3090 | return 0; |
3091 | ||
3092 | lxc_list_for_each(iterator, network) { | |
3093 | int ret; | |
3094 | struct lxc_netdev *netdev = iterator->elem; | |
3095 | ||
3096 | if (netdev->type != LXC_NET_VETH) | |
3097 | continue; | |
3098 | ||
e3233f26 | 3099 | ret = lxc_recv_nointr(data_sock, netdev->name, IFNAMSIZ, 0); |
7729f8e5 | 3100 | if (ret < 0) |
7ab1ba02 | 3101 | return -1; |
7729f8e5 | 3102 | TRACE("Received network device name \"%s\" from parent", netdev->name); |
7ab1ba02 CB |
3103 | } |
3104 | ||
3105 | return 0; | |
3106 | } | |
a1ae535a CB |
3107 | |
3108 | int lxc_network_send_name_and_ifindex_to_parent(struct lxc_handler *handler) | |
3109 | { | |
3110 | struct lxc_list *iterator, *network; | |
3111 | int data_sock = handler->data_sock[0]; | |
3112 | ||
3113 | if (!handler->am_root) | |
3114 | return 0; | |
3115 | ||
3116 | network = &handler->conf->network; | |
3117 | lxc_list_for_each(iterator, network) { | |
3118 | int ret; | |
3119 | struct lxc_netdev *netdev = iterator->elem; | |
3120 | ||
3121 | /* Send network device name in the child's namespace to parent. */ | |
7fbb15ec | 3122 | ret = lxc_send_nointr(data_sock, netdev->name, IFNAMSIZ, MSG_NOSIGNAL); |
a1ae535a | 3123 | if (ret < 0) |
7729f8e5 | 3124 | return -1; |
a1ae535a CB |
3125 | |
3126 | /* Send network device ifindex in the child's namespace to | |
3127 | * parent. | |
3128 | */ | |
7fbb15ec | 3129 | ret = lxc_send_nointr(data_sock, &netdev->ifindex, sizeof(netdev->ifindex), MSG_NOSIGNAL); |
a1ae535a | 3130 | if (ret < 0) |
7729f8e5 | 3131 | return -1; |
a1ae535a CB |
3132 | } |
3133 | ||
3134 | TRACE("Sent network device names and ifindeces to parent"); | |
3135 | return 0; | |
a1ae535a CB |
3136 | } |
3137 | ||
3138 | int lxc_network_recv_name_and_ifindex_from_child(struct lxc_handler *handler) | |
3139 | { | |
3140 | struct lxc_list *iterator, *network; | |
3141 | int data_sock = handler->data_sock[1]; | |
3142 | ||
3143 | if (!handler->am_root) | |
3144 | return 0; | |
3145 | ||
3146 | network = &handler->conf->network; | |
3147 | lxc_list_for_each(iterator, network) { | |
3148 | int ret; | |
3149 | struct lxc_netdev *netdev = iterator->elem; | |
3150 | ||
3151 | /* Receive network device name in the child's namespace to | |
3152 | * parent. | |
3153 | */ | |
e3233f26 | 3154 | ret = lxc_recv_nointr(data_sock, netdev->name, IFNAMSIZ, 0); |
a1ae535a | 3155 | if (ret < 0) |
7729f8e5 | 3156 | return -1; |
a1ae535a CB |
3157 | |
3158 | /* Receive network device ifindex in the child's namespace to | |
3159 | * parent. | |
3160 | */ | |
e3233f26 | 3161 | ret = lxc_recv_nointr(data_sock, &netdev->ifindex, sizeof(netdev->ifindex), 0); |
a1ae535a | 3162 | if (ret < 0) |
7729f8e5 | 3163 | return -1; |
a1ae535a CB |
3164 | } |
3165 | ||
3166 | return 0; | |
a1ae535a | 3167 | } |
bb84beda CB |
3168 | |
3169 | void lxc_delete_network(struct lxc_handler *handler) | |
3170 | { | |
3171 | bool bret; | |
3172 | ||
3173 | if (handler->am_root) | |
3174 | bret = lxc_delete_network_priv(handler); | |
3175 | else | |
3176 | bret = lxc_delete_network_unpriv(handler); | |
3177 | if (!bret) | |
3178 | DEBUG("Failed to delete network devices"); | |
3179 | else | |
3180 | DEBUG("Deleted network devices"); | |
3181 | } | |
1cd95214 | 3182 | |
1cd95214 CB |
3183 | int lxc_netns_set_nsid(int fd) |
3184 | { | |
41a3300d | 3185 | int ret; |
0ce60f0d CB |
3186 | char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + |
3187 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) + | |
3188 | NLMSG_ALIGN(1024)]; | |
1cd95214 | 3189 | struct nl_handler nlh; |
0ce60f0d CB |
3190 | struct nlmsghdr *hdr; |
3191 | struct rtgenmsg *msg; | |
bfcedc7e | 3192 | int saved_errno; |
9d036caa CB |
3193 | const __s32 ns_id = -1; |
3194 | const __u32 netns_fd = fd; | |
1cd95214 CB |
3195 | |
3196 | ret = netlink_open(&nlh, NETLINK_ROUTE); | |
3197 | if (ret < 0) | |
41a3300d | 3198 | return -1; |
1cd95214 | 3199 | |
0ce60f0d | 3200 | memset(buf, 0, sizeof(buf)); |
6ce39620 CB |
3201 | |
3202 | #pragma GCC diagnostic push | |
3203 | #pragma GCC diagnostic ignored "-Wcast-align" | |
0ce60f0d CB |
3204 | hdr = (struct nlmsghdr *)buf; |
3205 | msg = (struct rtgenmsg *)NLMSG_DATA(hdr); | |
6ce39620 | 3206 | #pragma GCC diagnostic pop |
1cd95214 | 3207 | |
0ce60f0d CB |
3208 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*msg)); |
3209 | hdr->nlmsg_type = RTM_NEWNSID; | |
3210 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
3211 | hdr->nlmsg_pid = 0; | |
3212 | hdr->nlmsg_seq = RTM_NEWNSID; | |
3213 | msg->rtgen_family = AF_UNSPEC; | |
1cd95214 | 3214 | |
9d036caa CB |
3215 | ret = addattr(hdr, 1024, __LXC_NETNSA_FD, &netns_fd, sizeof(netns_fd)); |
3216 | if (ret < 0) | |
3217 | goto on_error; | |
3218 | ||
3219 | ret = addattr(hdr, 1024, __LXC_NETNSA_NSID, &ns_id, sizeof(ns_id)); | |
3220 | if (ret < 0) | |
3221 | goto on_error; | |
1cd95214 | 3222 | |
9fbbc427 | 3223 | ret = __netlink_transaction(&nlh, hdr, hdr); |
9d036caa CB |
3224 | |
3225 | on_error: | |
bfcedc7e | 3226 | saved_errno = errno; |
1cd95214 | 3227 | netlink_close(&nlh); |
bfcedc7e | 3228 | errno = saved_errno; |
1cd95214 | 3229 | |
9d036caa | 3230 | return ret; |
1cd95214 | 3231 | } |
938980ba CB |
3232 | |
3233 | static int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len) | |
3234 | { | |
3235 | ||
3236 | memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); | |
3237 | ||
3238 | while (RTA_OK(rta, len)) { | |
3239 | unsigned short type = rta->rta_type; | |
3240 | ||
3241 | if ((type <= max) && (!tb[type])) | |
3242 | tb[type] = rta; | |
3243 | ||
6ce39620 CB |
3244 | #pragma GCC diagnostic push |
3245 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba | 3246 | rta = RTA_NEXT(rta, len); |
6ce39620 | 3247 | #pragma GCC diagnostic pop |
938980ba CB |
3248 | } |
3249 | ||
3250 | return 0; | |
3251 | } | |
3252 | ||
3253 | static inline __s32 rta_getattr_s32(const struct rtattr *rta) | |
3254 | { | |
3255 | return *(__s32 *)RTA_DATA(rta); | |
3256 | } | |
3257 | ||
3258 | #ifndef NETNS_RTA | |
3259 | #define NETNS_RTA(r) \ | |
3260 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct rtgenmsg)))) | |
3261 | #endif | |
3262 | ||
3263 | int lxc_netns_get_nsid(int fd) | |
3264 | { | |
3265 | int ret; | |
3266 | ssize_t len; | |
3267 | char buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) + | |
9d036caa CB |
3268 | NLMSG_ALIGN(sizeof(struct rtgenmsg)) + |
3269 | NLMSG_ALIGN(1024)]; | |
938980ba CB |
3270 | struct rtattr *tb[__LXC_NETNSA_MAX + 1]; |
3271 | struct nl_handler nlh; | |
3272 | struct nlmsghdr *hdr; | |
3273 | struct rtgenmsg *msg; | |
3274 | int saved_errno; | |
3275 | __u32 netns_fd = fd; | |
3276 | ||
3277 | ret = netlink_open(&nlh, NETLINK_ROUTE); | |
3278 | if (ret < 0) | |
3279 | return -1; | |
3280 | ||
3281 | memset(buf, 0, sizeof(buf)); | |
6ce39620 CB |
3282 | |
3283 | #pragma GCC diagnostic push | |
3284 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba CB |
3285 | hdr = (struct nlmsghdr *)buf; |
3286 | msg = (struct rtgenmsg *)NLMSG_DATA(hdr); | |
6ce39620 | 3287 | #pragma GCC diagnostic pop |
938980ba CB |
3288 | |
3289 | hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*msg)); | |
3290 | hdr->nlmsg_type = RTM_GETNSID; | |
3291 | hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; | |
3292 | hdr->nlmsg_pid = 0; | |
3293 | hdr->nlmsg_seq = RTM_GETNSID; | |
3294 | msg->rtgen_family = AF_UNSPEC; | |
3295 | ||
9d036caa CB |
3296 | ret = addattr(hdr, 1024, __LXC_NETNSA_FD, &netns_fd, sizeof(netns_fd)); |
3297 | if (ret == 0) | |
3298 | ret = __netlink_transaction(&nlh, hdr, hdr); | |
938980ba | 3299 | |
938980ba CB |
3300 | saved_errno = errno; |
3301 | netlink_close(&nlh); | |
3302 | errno = saved_errno; | |
3303 | if (ret < 0) | |
3304 | return -1; | |
3305 | ||
9d036caa | 3306 | errno = EINVAL; |
938980ba CB |
3307 | msg = NLMSG_DATA(hdr); |
3308 | len = hdr->nlmsg_len - NLMSG_SPACE(sizeof(*msg)); | |
3309 | if (len < 0) | |
3310 | return -1; | |
3311 | ||
6ce39620 CB |
3312 | #pragma GCC diagnostic push |
3313 | #pragma GCC diagnostic ignored "-Wcast-align" | |
938980ba CB |
3314 | parse_rtattr(tb, __LXC_NETNSA_MAX, NETNS_RTA(msg), len); |
3315 | if (tb[__LXC_NETNSA_NSID]) | |
3316 | return rta_getattr_s32(tb[__LXC_NETNSA_NSID]); | |
6ce39620 | 3317 | #pragma GCC diagnostic pop |
938980ba CB |
3318 | |
3319 | return -1; | |
3320 | } |