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bridge: add support for adding vlans to a bridge
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation
13 *
14 * This program 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
17 * GNU General Public License for more details.
18 */
19 #define _GNU_SOURCE
20
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/stat.h>
24 #include <sys/syscall.h>
25
26 #include <net/if.h>
27 #include <net/if_arp.h>
28
29 #include <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/ether.h>
32 #include <netinet/in.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #ifndef RTN_FAILED_POLICY
52 #define RTN_FAILED_POLICY 12
53 #endif
54
55 #ifndef IFA_F_NOPREFIXROUTE
56 #define IFA_F_NOPREFIXROUTE 0x200
57 #endif
58
59 #ifndef IFA_FLAGS
60 #define IFA_FLAGS (IFA_MULTICAST + 1)
61 #endif
62
63 #include <string.h>
64 #include <fcntl.h>
65 #include <glob.h>
66 #include <time.h>
67 #include <unistd.h>
68
69 #include <netlink/msg.h>
70 #include <netlink/attr.h>
71 #include <netlink/socket.h>
72 #include <libubox/uloop.h>
73
74 #include "netifd.h"
75 #include "device.h"
76 #include "system.h"
77 #include "utils.h"
78
79 struct event_socket {
80 struct uloop_fd uloop;
81 struct nl_sock *sock;
82 int bufsize;
83 };
84
85 static int sock_ioctl = -1;
86 static struct nl_sock *sock_rtnl = NULL;
87
88 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
89 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
90 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
91 const unsigned int link, struct blob_attr **tb);
92 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
93
94 static char dev_buf[256];
95
96 static void
97 handler_nl_event(struct uloop_fd *u, unsigned int events)
98 {
99 struct event_socket *ev = container_of(u, struct event_socket, uloop);
100 int err;
101 socklen_t errlen = sizeof(err);
102
103 if (!u->error) {
104 nl_recvmsgs_default(ev->sock);
105 return;
106 }
107
108 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
109 goto abort;
110
111 switch(err) {
112 case ENOBUFS:
113 /* Increase rx buffer size on netlink socket */
114 ev->bufsize *= 2;
115 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
116 goto abort;
117
118 /* Request full dump since some info got dropped */
119 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
120 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
121 break;
122
123 default:
124 goto abort;
125 }
126 u->error = false;
127 return;
128
129 abort:
130 uloop_fd_delete(&ev->uloop);
131 return;
132 }
133
134 static struct nl_sock *
135 create_socket(int protocol, int groups)
136 {
137 struct nl_sock *sock;
138
139 sock = nl_socket_alloc();
140 if (!sock)
141 return NULL;
142
143 if (groups)
144 nl_join_groups(sock, groups);
145
146 if (nl_connect(sock, protocol)) {
147 nl_socket_free(sock);
148 return NULL;
149 }
150
151 return sock;
152 }
153
154 static bool
155 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
156 uloop_fd_handler cb, int flags)
157 {
158 ev->sock = create_socket(protocol, groups);
159 if (!ev->sock)
160 return false;
161
162 ev->uloop.fd = nl_socket_get_fd(ev->sock);
163 ev->uloop.cb = cb;
164 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
165 return false;
166
167 return true;
168 }
169
170 static bool
171 create_event_socket(struct event_socket *ev, int protocol,
172 int (*cb)(struct nl_msg *msg, void *arg))
173 {
174 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
175 return false;
176
177 /* Install the valid custom callback handler */
178 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
179
180 /* Disable sequence number checking on event sockets */
181 nl_socket_disable_seq_check(ev->sock);
182
183 /* Increase rx buffer size to 65K on event sockets */
184 ev->bufsize = 65535;
185 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
186 return false;
187
188 return true;
189 }
190
191 static bool
192 create_hotplug_event_socket(struct event_socket *ev, int protocol,
193 void (*cb)(struct uloop_fd *u, unsigned int events))
194 {
195 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
196 return false;
197
198 /* Increase rx buffer size to 65K on event sockets */
199 ev->bufsize = 65535;
200 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
201 return false;
202
203 return true;
204 }
205
206 static bool
207 system_rtn_aton(const char *src, unsigned int *dst)
208 {
209 char *e;
210 unsigned int n;
211
212 if (!strcmp(src, "local"))
213 n = RTN_LOCAL;
214 else if (!strcmp(src, "nat"))
215 n = RTN_NAT;
216 else if (!strcmp(src, "broadcast"))
217 n = RTN_BROADCAST;
218 else if (!strcmp(src, "anycast"))
219 n = RTN_ANYCAST;
220 else if (!strcmp(src, "multicast"))
221 n = RTN_MULTICAST;
222 else if (!strcmp(src, "prohibit"))
223 n = RTN_PROHIBIT;
224 else if (!strcmp(src, "unreachable"))
225 n = RTN_UNREACHABLE;
226 else if (!strcmp(src, "blackhole"))
227 n = RTN_BLACKHOLE;
228 else if (!strcmp(src, "xresolve"))
229 n = RTN_XRESOLVE;
230 else if (!strcmp(src, "unicast"))
231 n = RTN_UNICAST;
232 else if (!strcmp(src, "throw"))
233 n = RTN_THROW;
234 else if (!strcmp(src, "failed_policy"))
235 n = RTN_FAILED_POLICY;
236 else {
237 n = strtoul(src, &e, 0);
238 if (!e || *e || e == src || n > 255)
239 return false;
240 }
241
242 *dst = n;
243 return true;
244 }
245
246 static bool
247 system_tos_aton(const char *src, unsigned *dst)
248 {
249 char *e;
250
251 *dst = strtoul(src, &e, 16);
252 if (e == src || *e || *dst > 255)
253 return false;
254
255 return true;
256 }
257
258 int system_init(void)
259 {
260 static struct event_socket rtnl_event;
261 static struct event_socket hotplug_event;
262
263 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
264 system_fd_set_cloexec(sock_ioctl);
265
266 /* Prepare socket for routing / address control */
267 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
268 if (!sock_rtnl)
269 return -1;
270
271 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
272 return -1;
273
274 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
275 handle_hotplug_event))
276 return -1;
277
278 /* Receive network link events form kernel */
279 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
280
281 return 0;
282 }
283
284 static void system_set_sysctl(const char *path, const char *val)
285 {
286 int fd;
287
288 fd = open(path, O_WRONLY);
289 if (fd < 0)
290 return;
291
292 if (write(fd, val, strlen(val))) {}
293 close(fd);
294 }
295
296 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
297 {
298 snprintf(dev_buf, sizeof(dev_buf), path, device);
299 system_set_sysctl(dev_buf, val);
300 }
301
302 static void system_set_disable_ipv6(struct device *dev, const char *val)
303 {
304 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
305 }
306
307 static void system_set_rpfilter(struct device *dev, const char *val)
308 {
309 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
310 }
311
312 static void system_set_acceptlocal(struct device *dev, const char *val)
313 {
314 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
315 }
316
317 static void system_set_igmpversion(struct device *dev, const char *val)
318 {
319 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
320 }
321
322 static void system_set_mldversion(struct device *dev, const char *val)
323 {
324 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
325 }
326
327 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
328 {
329 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
330 }
331
332 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
333 {
334 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
335 }
336
337 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
338 {
339 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
340 }
341
342 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
343 {
344 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
345 }
346
347 static void system_set_neigh4locktime(struct device *dev, const char *val)
348 {
349 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
350 }
351
352 static void system_set_dadtransmits(struct device *dev, const char *val)
353 {
354 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
355 }
356
357 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
358 {
359 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
360 }
361
362 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
363 {
364 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
365 }
366
367 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
368 {
369 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
370 }
371
372 static void system_bridge_set_isolated(struct device *dev, const char *val)
373 {
374 system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val);
375 }
376
377 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
378 {
379 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
380 "/sys/class/net/%s/brport/multicast_router",
381 dev->ifname, val);
382 }
383
384 static void system_bridge_set_robustness(struct device *dev, const char *val)
385 {
386 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
387 dev->ifname, val);
388 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
389 dev->ifname, val);
390 }
391
392 static void system_bridge_set_query_interval(struct device *dev, const char *val)
393 {
394 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
395 dev->ifname, val);
396 }
397
398 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
399 {
400 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
401 dev->ifname, val);
402 }
403
404 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
405 {
406 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
407 dev->ifname, val);
408 }
409
410 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
411 {
412 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
413 dev->ifname, val);
414 }
415
416 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
417 {
418 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
419 dev->ifname, val);
420 }
421
422 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
423 {
424 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
425 dev->ifname, val);
426 }
427
428 static void system_bridge_set_stp_state(struct device *dev, const char *val)
429 {
430 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/stp_state", dev->ifname, val);
431 }
432
433 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
434 {
435 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/forward_delay", dev->ifname, val);
436 }
437
438 static void system_bridge_set_priority(struct device *dev, const char *val)
439 {
440 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/priority", dev->ifname, val);
441 }
442
443 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
444 {
445 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/ageing_time", dev->ifname, val);
446 }
447
448 static void system_bridge_set_hello_time(struct device *dev, const char *val)
449 {
450 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hello_time", dev->ifname, val);
451 }
452
453 static void system_bridge_set_max_age(struct device *dev, const char *val)
454 {
455 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/max_age", dev->ifname, val);
456 }
457
458 static void system_bridge_set_learning(struct device *dev, const char *val)
459 {
460 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
461 }
462
463 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
464 {
465 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
466 }
467
468 static void system_set_sendredirects(struct device *dev, const char *val)
469 {
470 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
471 }
472
473 static void system_bridge_set_vlan_filtering(struct device *dev, const char *val)
474 {
475 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/vlan_filtering", dev->ifname, val);
476 }
477
478 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
479 {
480 int fd = -1, ret = -1;
481
482 fd = open(path, O_RDONLY);
483 if (fd < 0)
484 goto out;
485
486 ssize_t len = read(fd, buf, buf_sz - 1);
487 if (len < 0)
488 goto out;
489
490 ret = buf[len] = 0;
491
492 out:
493 if (fd >= 0)
494 close(fd);
495
496 return ret;
497 }
498
499 static int
500 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
501 {
502 snprintf(dev_buf, sizeof(dev_buf), path, device);
503 return system_get_sysctl(dev_buf, buf, buf_sz);
504 }
505
506 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
507 {
508 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
509 dev->ifname, buf, buf_sz);
510 }
511
512 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
513 {
514 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
515 dev->ifname, buf, buf_sz);
516 }
517
518 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
519 {
520 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
521 dev->ifname, buf, buf_sz);
522 }
523
524 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
525 {
526 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
527 dev->ifname, buf, buf_sz);
528 }
529
530 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
531 {
532 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
533 dev->ifname, buf, buf_sz);
534 }
535
536 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
537 {
538 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
539 dev->ifname, buf, buf_sz);
540 }
541
542 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
543 {
544 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
545 dev->ifname, buf, buf_sz);
546 }
547
548 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
549 {
550 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
551 dev->ifname, buf, buf_sz);
552 }
553
554 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
555 {
556 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
557 dev->ifname, buf, buf_sz);
558 }
559
560 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
561 {
562 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
563 dev->ifname, buf, buf_sz);
564 }
565
566 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
567 {
568 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
569 dev->ifname, buf, buf_sz);
570 }
571
572 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
573 {
574 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
575 dev->ifname, buf, buf_sz);
576 }
577
578 /* Evaluate netlink messages */
579 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
580 {
581 struct nlmsghdr *nh = nlmsg_hdr(msg);
582 struct nlattr *nla[__IFLA_MAX];
583 int link_state = 0;
584 char buf[10];
585
586 if (nh->nlmsg_type != RTM_NEWLINK)
587 goto out;
588
589 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
590 if (!nla[IFLA_IFNAME])
591 goto out;
592
593 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
594 if (!dev)
595 goto out;
596
597 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
598 link_state = strtoul(buf, NULL, 0);
599
600 if (dev->type == &simple_device_type && !system_if_force_external(dev->ifname))
601 device_set_present(dev, true);
602
603 device_set_link(dev, link_state ? true : false);
604
605 out:
606 return 0;
607 }
608
609 static void
610 handle_hotplug_msg(char *data, int size)
611 {
612 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
613 char *cur, *end, *sep;
614 struct device *dev;
615 int skip;
616 bool add, move = false;
617
618 if (!strncmp(data, "add@", 4))
619 add = true;
620 else if (!strncmp(data, "remove@", 7))
621 add = false;
622 else if (!strncmp(data, "move@", 5)) {
623 add = true;
624 move = true;
625 }
626 else
627 return;
628
629 skip = strlen(data) + 1;
630 end = data + size;
631
632 for (cur = data + skip; cur < end; cur += skip) {
633 skip = strlen(cur) + 1;
634
635 sep = strchr(cur, '=');
636 if (!sep)
637 continue;
638
639 *sep = 0;
640 if (!strcmp(cur, "INTERFACE"))
641 interface = sep + 1;
642 else if (!strcmp(cur, "SUBSYSTEM")) {
643 subsystem = sep + 1;
644 if (strcmp(subsystem, "net") != 0)
645 return;
646 } else if (!strcmp(cur, "DEVPATH_OLD")) {
647 interface_old = strrchr(sep + 1, '/');
648 if (interface_old)
649 interface_old++;
650 }
651 }
652
653 if (subsystem && interface) {
654 if (move && interface_old)
655 goto move;
656 else
657 goto found;
658 }
659
660 return;
661
662 move:
663 dev = device_find(interface_old);
664 if (!dev)
665 return;
666
667 if (dev->type != &simple_device_type)
668 goto found;
669
670 device_set_present(dev, false);
671
672 return;
673
674 found:
675 dev = device_find(interface);
676 if (!dev)
677 return;
678
679 if (dev->type != &simple_device_type)
680 return;
681
682 if (add && system_if_force_external(dev->ifname))
683 return;
684
685 device_set_present(dev, add);
686 }
687
688 static void
689 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
690 {
691 struct event_socket *ev = container_of(u, struct event_socket, uloop);
692 struct sockaddr_nl nla;
693 unsigned char *buf = NULL;
694 int size;
695 int err;
696 socklen_t errlen = sizeof(err);
697
698 if (!u->error) {
699 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
700 if (nla.nl_pid == 0)
701 handle_hotplug_msg((char *) buf, size);
702
703 free(buf);
704 }
705 return;
706 }
707
708 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
709 goto abort;
710
711 switch(err) {
712 case ENOBUFS:
713 /* Increase rx buffer size on netlink socket */
714 ev->bufsize *= 2;
715 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
716 goto abort;
717 break;
718
719 default:
720 goto abort;
721 }
722 u->error = false;
723 return;
724
725 abort:
726 uloop_fd_delete(&ev->uloop);
727 return;
728 }
729
730 static int system_rtnl_call(struct nl_msg *msg)
731 {
732 int ret;
733
734 ret = nl_send_auto_complete(sock_rtnl, msg);
735 nlmsg_free(msg);
736
737 if (ret < 0)
738 return ret;
739
740 return nl_wait_for_ack(sock_rtnl);
741 }
742
743 int system_bridge_delbr(struct device *bridge)
744 {
745 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
746 }
747
748 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
749 {
750 struct ifreq ifr;
751
752 memset(&ifr, 0, sizeof(ifr));
753 if (dev)
754 ifr.ifr_ifindex = dev->ifindex;
755 else
756 ifr.ifr_data = data;
757 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
758 return ioctl(sock_ioctl, cmd, &ifr);
759 }
760
761 static bool system_is_bridge(const char *name, char *buf, int buflen)
762 {
763 struct stat st;
764
765 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
766 if (stat(buf, &st) < 0)
767 return false;
768
769 return true;
770 }
771
772 static char *system_get_bridge(const char *name, char *buf, int buflen)
773 {
774 char *path;
775 ssize_t len = -1;
776 glob_t gl;
777
778 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
779 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
780 return NULL;
781
782 if (gl.gl_pathc > 0)
783 len = readlink(gl.gl_pathv[0], buf, buflen);
784
785 globfree(&gl);
786
787 if (len < 0)
788 return NULL;
789
790 buf[len] = 0;
791 path = strrchr(buf, '/');
792 if (!path)
793 return NULL;
794
795 return path + 1;
796 }
797
798 static void
799 system_bridge_set_wireless(struct device *bridge, struct device *dev)
800 {
801 bool mcast_to_ucast = dev->wireless_ap;
802 bool hairpin = true;
803
804 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
805 !bridge->settings.multicast_to_unicast)
806 mcast_to_ucast = false;
807
808 if (!mcast_to_ucast || dev->wireless_isolate)
809 hairpin = false;
810
811 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
812 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
813 }
814
815 int system_bridge_addif(struct device *bridge, struct device *dev)
816 {
817 char buf[64];
818 char *oldbr;
819 int ret = 0;
820
821 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
822 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
823 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
824
825 if (dev->wireless)
826 system_bridge_set_wireless(bridge, dev);
827
828 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
829 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
830 system_bridge_set_multicast_router(dev, buf, false);
831 }
832
833 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
834 dev->settings.multicast_fast_leave)
835 system_bridge_set_multicast_fast_leave(dev, "1");
836
837 if (dev->settings.flags & DEV_OPT_LEARNING &&
838 !dev->settings.learning)
839 system_bridge_set_learning(dev, "0");
840
841 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
842 !dev->settings.unicast_flood)
843 system_bridge_set_unicast_flood(dev, "0");
844
845 if (dev->settings.flags & DEV_OPT_ISOLATE &&
846 dev->settings.isolate)
847 system_bridge_set_isolated(dev, "1");
848
849 return ret;
850 }
851
852 int system_bridge_delif(struct device *bridge, struct device *dev)
853 {
854 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
855 }
856
857 int system_bridge_vlan(const char *iface, uint16_t vid, bool add, unsigned int vflags)
858 {
859 struct ifinfomsg ifi = { .ifi_family = PF_BRIDGE, };
860 struct bridge_vlan_info vinfo = { .vid = vid, };
861 unsigned short flags = 0;
862 struct nlattr *afspec;
863 struct nl_msg *nlm;
864 int ret = 0;
865
866 ifi.ifi_index = if_nametoindex(iface);
867 if (!ifi.ifi_index)
868 return -1;
869
870 nlm = nlmsg_alloc_simple(add ? RTM_SETLINK : RTM_DELLINK, NLM_F_REQUEST);
871 if (!nlm)
872 return -1;
873
874 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
875
876 if (vflags & BRVLAN_F_SELF)
877 flags |= BRIDGE_FLAGS_SELF;
878
879 if (vflags & BRVLAN_F_PVID)
880 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
881
882 if (vflags & BRVLAN_F_UNTAGGED)
883 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
884
885 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
886 if (!afspec) {
887 ret = -ENOMEM;
888 goto failure;
889 }
890
891 if (flags)
892 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
893
894 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
895 nla_nest_end(nlm, afspec);
896
897 return system_rtnl_call(nlm);
898
899 failure:
900 nlmsg_free(nlm);
901 return ret;
902 }
903
904 int system_if_resolve(struct device *dev)
905 {
906 struct ifreq ifr;
907 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
908 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
909 return ifr.ifr_ifindex;
910 else
911 return 0;
912 }
913
914 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
915 {
916 struct ifreq ifr;
917
918 memset(&ifr, 0, sizeof(ifr));
919 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
920 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
921 return -1;
922
923 ifr.ifr_flags |= add;
924 ifr.ifr_flags &= ~rem;
925 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
926 }
927
928 struct clear_data {
929 struct nl_msg *msg;
930 struct device *dev;
931 int type;
932 int size;
933 int af;
934 };
935
936
937 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
938 {
939 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
940
941 return ifa->ifa_index == ifindex;
942 }
943
944 static bool check_route(struct nlmsghdr *hdr, int ifindex)
945 {
946 struct rtmsg *r = NLMSG_DATA(hdr);
947 struct nlattr *tb[__RTA_MAX];
948
949 if (r->rtm_protocol == RTPROT_KERNEL &&
950 r->rtm_family == AF_INET6)
951 return false;
952
953 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
954 if (!tb[RTA_OIF])
955 return false;
956
957 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
958 }
959
960 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
961 {
962 return true;
963 }
964
965 static int cb_clear_event(struct nl_msg *msg, void *arg)
966 {
967 struct clear_data *clr = arg;
968 struct nlmsghdr *hdr = nlmsg_hdr(msg);
969 bool (*cb)(struct nlmsghdr *, int ifindex);
970 int type, ret;
971
972 switch(clr->type) {
973 case RTM_GETADDR:
974 type = RTM_DELADDR;
975 if (hdr->nlmsg_type != RTM_NEWADDR)
976 return NL_SKIP;
977
978 cb = check_ifaddr;
979 break;
980 case RTM_GETROUTE:
981 type = RTM_DELROUTE;
982 if (hdr->nlmsg_type != RTM_NEWROUTE)
983 return NL_SKIP;
984
985 cb = check_route;
986 break;
987 case RTM_GETRULE:
988 type = RTM_DELRULE;
989 if (hdr->nlmsg_type != RTM_NEWRULE)
990 return NL_SKIP;
991
992 cb = check_rule;
993 break;
994 default:
995 return NL_SKIP;
996 }
997
998 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
999 return NL_SKIP;
1000
1001 if (type == RTM_DELRULE)
1002 D(SYSTEM, "Remove a rule\n");
1003 else
1004 D(SYSTEM, "Remove %s from device %s\n",
1005 type == RTM_DELADDR ? "an address" : "a route",
1006 clr->dev->ifname);
1007
1008 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1009 hdr = nlmsg_hdr(clr->msg);
1010 hdr->nlmsg_type = type;
1011 hdr->nlmsg_flags = NLM_F_REQUEST;
1012
1013 nl_socket_disable_auto_ack(sock_rtnl);
1014 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1015 if (ret < 0) {
1016 if (type == RTM_DELRULE)
1017 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1018 else
1019 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1020 type == RTM_DELADDR ? "an address" : "a route",
1021 clr->dev->ifname, ret);
1022 }
1023
1024 nl_socket_enable_auto_ack(sock_rtnl);
1025
1026 return NL_SKIP;
1027 }
1028
1029 static int
1030 cb_finish_event(struct nl_msg *msg, void *arg)
1031 {
1032 int *pending = arg;
1033 *pending = 0;
1034 return NL_STOP;
1035 }
1036
1037 static int
1038 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1039 {
1040 int *pending = arg;
1041 *pending = err->error;
1042 return NL_STOP;
1043 }
1044
1045 static void
1046 system_if_clear_entries(struct device *dev, int type, int af)
1047 {
1048 struct clear_data clr;
1049 struct nl_cb *cb;
1050 struct rtmsg rtm = {
1051 .rtm_family = af,
1052 .rtm_flags = RTM_F_CLONED,
1053 };
1054 int flags = NLM_F_DUMP;
1055 int pending = 1;
1056
1057 clr.af = af;
1058 clr.dev = dev;
1059 clr.type = type;
1060 switch (type) {
1061 case RTM_GETADDR:
1062 case RTM_GETRULE:
1063 clr.size = sizeof(struct rtgenmsg);
1064 break;
1065 case RTM_GETROUTE:
1066 clr.size = sizeof(struct rtmsg);
1067 break;
1068 default:
1069 return;
1070 }
1071
1072 cb = nl_cb_alloc(NL_CB_DEFAULT);
1073 if (!cb)
1074 return;
1075
1076 clr.msg = nlmsg_alloc_simple(type, flags);
1077 if (!clr.msg)
1078 goto out;
1079
1080 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1081 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1082 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1083 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1084
1085 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1086 goto free;
1087
1088 while (pending > 0)
1089 nl_recvmsgs(sock_rtnl, cb);
1090
1091 free:
1092 nlmsg_free(clr.msg);
1093 out:
1094 nl_cb_put(cb);
1095 }
1096
1097 /*
1098 * Clear bridge (membership) state and bring down device
1099 */
1100 void system_if_clear_state(struct device *dev)
1101 {
1102 static char buf[256];
1103 char *bridge;
1104 device_set_ifindex(dev, system_if_resolve(dev));
1105
1106 if (dev->external || !dev->ifindex)
1107 return;
1108
1109 system_if_flags(dev->ifname, 0, IFF_UP);
1110
1111 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
1112 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1113 system_bridge_delbr(dev);
1114 return;
1115 }
1116
1117 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1118 if (bridge) {
1119 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1120 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1121 }
1122
1123 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1124 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1125 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1126 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1127 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1128 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1129 system_set_disable_ipv6(dev, "0");
1130 }
1131
1132 static inline unsigned long
1133 sec_to_jiffies(int val)
1134 {
1135 return (unsigned long) val * 100;
1136 }
1137
1138 static void system_bridge_conf_multicast_deps(struct device *bridge,
1139 struct bridge_config *cfg,
1140 char *buf,
1141 int buf_len)
1142 {
1143 int val;
1144
1145 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1146 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1147 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1148 val = cfg->robustness * cfg->query_interval +
1149 cfg->query_response_interval;
1150
1151 snprintf(buf, buf_len, "%i", val);
1152 system_bridge_set_membership_interval(bridge, buf);
1153
1154 val = cfg->robustness * cfg->query_interval +
1155 cfg->query_response_interval / 2;
1156
1157 snprintf(buf, buf_len, "%i", val);
1158 system_bridge_set_other_querier_timeout(bridge, buf);
1159 }
1160
1161 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1162 val = cfg->query_interval / 4;
1163
1164 snprintf(buf, buf_len, "%i", val);
1165 system_bridge_set_startup_query_interval(bridge, buf);
1166 }
1167 }
1168
1169 static void system_bridge_conf_multicast(struct device *bridge,
1170 struct bridge_config *cfg,
1171 char *buf,
1172 int buf_len)
1173 {
1174 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1175 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1176
1177 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1178 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1179
1180 snprintf(buf, buf_len, "%i", cfg->hash_max);
1181 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1182 bridge->ifname, buf);
1183
1184 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1185 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1186 system_bridge_set_multicast_router(bridge, buf, true);
1187 }
1188
1189 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1190 snprintf(buf, buf_len, "%i", cfg->robustness);
1191 system_bridge_set_robustness(bridge, buf);
1192 }
1193
1194 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1195 snprintf(buf, buf_len, "%i", cfg->query_interval);
1196 system_bridge_set_query_interval(bridge, buf);
1197 }
1198
1199 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1200 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1201 system_bridge_set_query_response_interval(bridge, buf);
1202 }
1203
1204 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1205 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1206 system_bridge_set_last_member_interval(bridge, buf);
1207 }
1208
1209 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1210 }
1211
1212 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1213 {
1214 char buf[64];
1215
1216 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1217 return -1;
1218
1219 system_bridge_set_stp_state(bridge, cfg->stp ? "1" : "0");
1220
1221 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1222 system_bridge_set_forward_delay(bridge, buf);
1223
1224 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1225 system_bridge_set_vlan_filtering(bridge, cfg->vlan_filtering ? "1" : "0");
1226
1227 snprintf(buf, sizeof(buf), "%d", cfg->priority);
1228 system_bridge_set_priority(bridge, buf);
1229
1230 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1231 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1232 system_bridge_set_ageing_time(bridge, buf);
1233 }
1234
1235 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1236 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1237 system_bridge_set_hello_time(bridge, buf);
1238 }
1239
1240 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1241 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1242 system_bridge_set_max_age(bridge, buf);
1243 }
1244
1245 return 0;
1246 }
1247
1248 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1249 {
1250 struct nl_msg *msg;
1251 struct nlattr *linkinfo, *data;
1252 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1253 int i, rv;
1254 static const struct {
1255 const char *name;
1256 enum macvlan_mode val;
1257 } modes[] = {
1258 { "private", MACVLAN_MODE_PRIVATE },
1259 { "vepa", MACVLAN_MODE_VEPA },
1260 { "bridge", MACVLAN_MODE_BRIDGE },
1261 { "passthru", MACVLAN_MODE_PASSTHRU },
1262 };
1263
1264 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1265
1266 if (!msg)
1267 return -1;
1268
1269 nlmsg_append(msg, &iim, sizeof(iim), 0);
1270
1271 if (cfg->flags & MACVLAN_OPT_MACADDR)
1272 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1273 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1274 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1275
1276 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1277 goto nla_put_failure;
1278
1279 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1280
1281 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1282 goto nla_put_failure;
1283
1284 if (cfg->mode) {
1285 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1286 if (strcmp(cfg->mode, modes[i].name) != 0)
1287 continue;
1288
1289 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1290 break;
1291 }
1292 }
1293
1294 nla_nest_end(msg, data);
1295 nla_nest_end(msg, linkinfo);
1296
1297 rv = system_rtnl_call(msg);
1298 if (rv)
1299 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1300
1301 return rv;
1302
1303 nla_put_failure:
1304 nlmsg_free(msg);
1305 return -ENOMEM;
1306 }
1307
1308 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1309 {
1310 struct nl_msg *msg;
1311 struct ifinfomsg iim = {
1312 .ifi_family = AF_UNSPEC,
1313 };
1314
1315 if (!dev)
1316 return -1;
1317
1318 iim.ifi_index = system_if_resolve(dev);
1319 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1320
1321 if (!msg)
1322 return -1;
1323
1324 nlmsg_append(msg, &iim, sizeof(iim), 0);
1325 if (target_ifname)
1326 nla_put_string(msg, IFLA_IFNAME, target_ifname);
1327
1328 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1329 return system_rtnl_call(msg);
1330 }
1331
1332 static int system_link_del(const char *ifname)
1333 {
1334 struct nl_msg *msg;
1335 struct ifinfomsg iim = {
1336 .ifi_family = AF_UNSPEC,
1337 .ifi_index = 0,
1338 };
1339
1340 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1341
1342 if (!msg)
1343 return -1;
1344
1345 nlmsg_append(msg, &iim, sizeof(iim), 0);
1346 nla_put_string(msg, IFLA_IFNAME, ifname);
1347 return system_rtnl_call(msg);
1348 }
1349
1350 int system_macvlan_del(struct device *macvlan)
1351 {
1352 return system_link_del(macvlan->ifname);
1353 }
1354
1355 int system_netns_open(const pid_t target_ns)
1356 {
1357 char pid_net_path[PATH_MAX];
1358
1359 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1360
1361 return open(pid_net_path, O_RDONLY);
1362 }
1363
1364 int system_netns_set(int netns_fd)
1365 {
1366 return setns(netns_fd, CLONE_NEWNET);
1367 }
1368
1369 int system_veth_add(struct device *veth, struct veth_config *cfg)
1370 {
1371 struct nl_msg *msg;
1372 struct ifinfomsg empty_iim = {};
1373 struct nlattr *linkinfo, *data, *veth_info;
1374 int rv;
1375
1376 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1377
1378 if (!msg)
1379 return -1;
1380
1381 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1382
1383 if (cfg->flags & VETH_OPT_MACADDR)
1384 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1385 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1386
1387 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1388 goto nla_put_failure;
1389
1390 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1391
1392 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1393 goto nla_put_failure;
1394
1395 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1396 goto nla_put_failure;
1397
1398 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1399
1400 if (cfg->flags & VETH_OPT_PEER_NAME)
1401 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1402 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1403 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1404
1405 nla_nest_end(msg, veth_info);
1406 nla_nest_end(msg, data);
1407 nla_nest_end(msg, linkinfo);
1408
1409 rv = system_rtnl_call(msg);
1410 if (rv) {
1411 if (cfg->flags & VETH_OPT_PEER_NAME)
1412 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1413 else
1414 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1415 }
1416
1417 return rv;
1418
1419 nla_put_failure:
1420 nlmsg_free(msg);
1421 return -ENOMEM;
1422 }
1423
1424 int system_veth_del(struct device *veth)
1425 {
1426 return system_link_del(veth->ifname);
1427 }
1428
1429 static int system_vlan(struct device *dev, int id)
1430 {
1431 struct vlan_ioctl_args ifr = {
1432 .cmd = SET_VLAN_NAME_TYPE_CMD,
1433 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1434 };
1435
1436 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1437 return -1;
1438
1439 if (id < 0) {
1440 ifr.cmd = DEL_VLAN_CMD;
1441 ifr.u.VID = 0;
1442 } else {
1443 ifr.cmd = ADD_VLAN_CMD;
1444 ifr.u.VID = id;
1445 }
1446 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1447 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1448 }
1449
1450 int system_vlan_add(struct device *dev, int id)
1451 {
1452 return system_vlan(dev, id);
1453 }
1454
1455 int system_vlan_del(struct device *dev)
1456 {
1457 return system_vlan(dev, -1);
1458 }
1459
1460 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1461 {
1462 struct nl_msg *msg;
1463 struct nlattr *linkinfo, *data, *qos;
1464 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1465 struct vlan_qos_mapping *elem;
1466 struct ifla_vlan_qos_mapping nl_qos_map;
1467 int rv;
1468
1469 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1470
1471 if (!msg)
1472 return -1;
1473
1474 nlmsg_append(msg, &iim, sizeof(iim), 0);
1475 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1476 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1477
1478 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1479 goto nla_put_failure;
1480
1481 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1482
1483 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1484 goto nla_put_failure;
1485
1486 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1487
1488 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1489 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1490 #else
1491 if(cfg->proto == VLAN_PROTO_8021AD)
1492 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev->type->name);
1493 #endif
1494
1495 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1496 goto nla_put_failure;
1497
1498 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1499 nl_qos_map.from = elem->from;
1500 nl_qos_map.to = elem->to;
1501 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1502 }
1503 nla_nest_end(msg, qos);
1504
1505 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1506 goto nla_put_failure;
1507
1508 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1509 nl_qos_map.from = elem->from;
1510 nl_qos_map.to = elem->to;
1511 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1512 }
1513 nla_nest_end(msg, qos);
1514
1515 nla_nest_end(msg, data);
1516 nla_nest_end(msg, linkinfo);
1517
1518 rv = system_rtnl_call(msg);
1519 if (rv)
1520 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1521
1522 return rv;
1523
1524 nla_put_failure:
1525 nlmsg_free(msg);
1526 return -ENOMEM;
1527 }
1528
1529 int system_vlandev_del(struct device *vlandev)
1530 {
1531 return system_link_del(vlandev->ifname);
1532 }
1533
1534 void
1535 system_if_get_settings(struct device *dev, struct device_settings *s)
1536 {
1537 struct ifreq ifr;
1538 char buf[10];
1539
1540 memset(&ifr, 0, sizeof(ifr));
1541 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1542
1543 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1544 s->mtu = ifr.ifr_mtu;
1545 s->flags |= DEV_OPT_MTU;
1546 }
1547
1548 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1549 if (s->mtu6 > 0)
1550 s->flags |= DEV_OPT_MTU6;
1551
1552 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1553 s->txqueuelen = ifr.ifr_qlen;
1554 s->flags |= DEV_OPT_TXQUEUELEN;
1555 }
1556
1557 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1558 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1559 s->flags |= DEV_OPT_MACADDR;
1560 }
1561
1562 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1563 s->ipv6 = !strtoul(buf, NULL, 0);
1564 s->flags |= DEV_OPT_IPV6;
1565 }
1566
1567 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1568 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1569 s->flags |= DEV_OPT_PROMISC;
1570
1571 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1572 s->flags |= DEV_OPT_MULTICAST;
1573 }
1574
1575 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1576 s->rpfilter = strtoul(buf, NULL, 0);
1577 s->flags |= DEV_OPT_RPFILTER;
1578 }
1579
1580 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1581 s->acceptlocal = strtoul(buf, NULL, 0);
1582 s->flags |= DEV_OPT_ACCEPTLOCAL;
1583 }
1584
1585 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1586 s->igmpversion = strtoul(buf, NULL, 0);
1587 s->flags |= DEV_OPT_IGMPVERSION;
1588 }
1589
1590 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1591 s->mldversion = strtoul(buf, NULL, 0);
1592 s->flags |= DEV_OPT_MLDVERSION;
1593 }
1594
1595 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1596 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1597 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1598 }
1599
1600 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1601 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1602 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1603 }
1604
1605 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1606 s->neigh4locktime = strtol(buf, NULL, 0);
1607 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1608 }
1609
1610 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1611 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1612 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1613 }
1614
1615 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1616 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1617 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1618 }
1619
1620 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1621 s->dadtransmits = strtoul(buf, NULL, 0);
1622 s->flags |= DEV_OPT_DADTRANSMITS;
1623 }
1624
1625 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1626 s->sendredirects = strtoul(buf, NULL, 0);
1627 s->flags |= DEV_OPT_SENDREDIRECTS;
1628 }
1629 }
1630
1631 void
1632 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1633 {
1634 struct ifreq ifr;
1635 char buf[12];
1636
1637 memset(&ifr, 0, sizeof(ifr));
1638 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1639 if (s->flags & DEV_OPT_MTU & apply_mask) {
1640 ifr.ifr_mtu = s->mtu;
1641 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1642 s->flags &= ~DEV_OPT_MTU;
1643 }
1644 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1645 system_update_ipv6_mtu(dev, s->mtu6);
1646 }
1647 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1648 ifr.ifr_qlen = s->txqueuelen;
1649 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1650 s->flags &= ~DEV_OPT_TXQUEUELEN;
1651 }
1652 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1653 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1654 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1655 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1656 s->flags &= ~DEV_OPT_MACADDR;
1657 }
1658 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1659 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1660 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1661 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1662 !s->promisc ? IFF_PROMISC : 0) < 0)
1663 s->flags &= ~DEV_OPT_PROMISC;
1664 }
1665 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1666 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1667 system_set_rpfilter(dev, buf);
1668 }
1669 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1670 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1671 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1672 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1673 system_set_igmpversion(dev, buf);
1674 }
1675 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1676 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1677 system_set_mldversion(dev, buf);
1678 }
1679 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1680 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1681 system_set_neigh4reachabletime(dev, buf);
1682 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1683 system_set_neigh6reachabletime(dev, buf);
1684 }
1685 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1686 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1687 system_set_neigh4locktime(dev, buf);
1688 }
1689 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1690 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1691 system_set_neigh4gcstaletime(dev, buf);
1692 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1693 system_set_neigh6gcstaletime(dev, buf);
1694 }
1695 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1696 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1697 system_set_dadtransmits(dev, buf);
1698 }
1699 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1700 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1701 !s->multicast ? IFF_MULTICAST : 0) < 0)
1702 s->flags &= ~DEV_OPT_MULTICAST;
1703 }
1704 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1705 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1706 }
1707
1708 int system_if_up(struct device *dev)
1709 {
1710 system_if_get_settings(dev, &dev->orig_settings);
1711 /* Only keep orig settings based on what needs to be set */
1712 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1713 dev->orig_settings.flags &= dev->settings.flags;
1714 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1715 return system_if_flags(dev->ifname, IFF_UP, 0);
1716 }
1717
1718 int system_if_down(struct device *dev)
1719 {
1720 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1721 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1722 return ret;
1723 }
1724
1725 struct if_check_data {
1726 struct device *dev;
1727 int pending;
1728 int ret;
1729 };
1730
1731 #ifndef IFF_LOWER_UP
1732 #define IFF_LOWER_UP 0x10000
1733 #endif
1734
1735 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1736 {
1737 struct nlmsghdr *nh = nlmsg_hdr(msg);
1738 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1739 struct if_check_data *chk = (struct if_check_data *)arg;
1740
1741 if (nh->nlmsg_type != RTM_NEWLINK)
1742 return NL_SKIP;
1743
1744 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1745 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1746
1747 return NL_OK;
1748 }
1749
1750 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1751 {
1752 struct if_check_data *chk = (struct if_check_data *)arg;
1753 chk->pending = 0;
1754 return NL_STOP;
1755 }
1756
1757 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1758 {
1759 struct if_check_data *chk = (struct if_check_data *)arg;
1760
1761 device_set_present(chk->dev, false);
1762 device_set_link(chk->dev, false);
1763 chk->pending = err->error;
1764
1765 return NL_STOP;
1766 }
1767
1768 int system_if_check(struct device *dev)
1769 {
1770 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1771 struct nl_msg *msg;
1772 struct ifinfomsg ifi = {
1773 .ifi_family = AF_UNSPEC,
1774 .ifi_index = 0,
1775 };
1776 struct if_check_data chk = {
1777 .dev = dev,
1778 .pending = 1,
1779 };
1780 int ret = 1;
1781
1782 if (!cb)
1783 return ret;
1784
1785 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1786 if (!msg)
1787 goto out;
1788
1789 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1790 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1791 goto free;
1792
1793 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1794 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1795 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1796
1797 ret = nl_send_auto_complete(sock_rtnl, msg);
1798 if (ret < 0)
1799 goto free;
1800
1801 while (chk.pending > 0)
1802 nl_recvmsgs(sock_rtnl, cb);
1803
1804 ret = chk.pending;
1805
1806 free:
1807 nlmsg_free(msg);
1808 out:
1809 nl_cb_put(cb);
1810 return ret;
1811 }
1812
1813 struct device *
1814 system_if_get_parent(struct device *dev)
1815 {
1816 char buf[64], *devname;
1817 int ifindex, iflink, len;
1818 FILE *f;
1819
1820 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1821 f = fopen(buf, "r");
1822 if (!f)
1823 return NULL;
1824
1825 len = fread(buf, 1, sizeof(buf) - 1, f);
1826 fclose(f);
1827
1828 if (len <= 0)
1829 return NULL;
1830
1831 buf[len] = 0;
1832 iflink = strtoul(buf, NULL, 0);
1833 ifindex = system_if_resolve(dev);
1834 if (!iflink || iflink == ifindex)
1835 return NULL;
1836
1837 devname = if_indextoname(iflink, buf);
1838 if (!devname)
1839 return NULL;
1840
1841 return device_get(devname, true);
1842 }
1843
1844 static bool
1845 read_string_file(int dir_fd, const char *file, char *buf, int len)
1846 {
1847 bool ret = false;
1848 char *c;
1849 int fd;
1850
1851 fd = openat(dir_fd, file, O_RDONLY);
1852 if (fd < 0)
1853 return false;
1854
1855 retry:
1856 len = read(fd, buf, len - 1);
1857 if (len < 0) {
1858 if (errno == EINTR)
1859 goto retry;
1860 } else if (len > 0) {
1861 buf[len] = 0;
1862
1863 c = strchr(buf, '\n');
1864 if (c)
1865 *c = 0;
1866
1867 ret = true;
1868 }
1869
1870 close(fd);
1871
1872 return ret;
1873 }
1874
1875 static bool
1876 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1877 {
1878 char buf[64];
1879 bool ret = false;
1880
1881 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1882 if (ret)
1883 *val = strtoull(buf, NULL, 0);
1884
1885 return ret;
1886 }
1887
1888 /* Assume advertised flags == supported flags */
1889 static const struct {
1890 uint32_t mask;
1891 const char *name;
1892 } ethtool_link_modes[] = {
1893 { ADVERTISED_10baseT_Half, "10baseT-H" },
1894 { ADVERTISED_10baseT_Full, "10baseT-F" },
1895 { ADVERTISED_100baseT_Half, "100baseT-H" },
1896 { ADVERTISED_100baseT_Full, "100baseT-F" },
1897 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1898 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1899 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1900 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1901 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1902 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1903 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1904 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1905 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1906 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1907 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1908 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1909 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1910 #ifdef ADVERTISED_56000baseKR4_Full
1911 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1912 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1913 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1914 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1915 #endif
1916 };
1917
1918 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1919 {
1920 int i;
1921 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1922 if (mask & ethtool_link_modes[i].mask)
1923 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1924 }
1925 }
1926
1927 bool
1928 system_if_force_external(const char *ifname)
1929 {
1930 char buf[64];
1931 struct stat s;
1932
1933 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1934 return stat(buf, &s) == 0;
1935 }
1936
1937 int
1938 system_if_dump_info(struct device *dev, struct blob_buf *b)
1939 {
1940 struct ethtool_cmd ecmd;
1941 struct ifreq ifr;
1942 char *s;
1943 void *c;
1944
1945 memset(&ecmd, 0, sizeof(ecmd));
1946 memset(&ifr, 0, sizeof(ifr));
1947 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1948 ifr.ifr_data = (caddr_t) &ecmd;
1949 ecmd.cmd = ETHTOOL_GSET;
1950
1951 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1952 c = blobmsg_open_array(b, "link-advertising");
1953 system_add_link_modes(b, ecmd.advertising);
1954 blobmsg_close_array(b, c);
1955
1956 c = blobmsg_open_array(b, "link-partner-advertising");
1957 system_add_link_modes(b, ecmd.lp_advertising);
1958 blobmsg_close_array(b, c);
1959
1960 c = blobmsg_open_array(b, "link-supported");
1961 system_add_link_modes(b, ecmd.supported);
1962 blobmsg_close_array(b, c);
1963
1964 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1965 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1966 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1967 blobmsg_add_string_buffer(b);
1968
1969 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1970 }
1971
1972 return 0;
1973 }
1974
1975 int
1976 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1977 {
1978 const char *const counters[] = {
1979 "collisions", "rx_frame_errors", "tx_compressed",
1980 "multicast", "rx_length_errors", "tx_dropped",
1981 "rx_bytes", "rx_missed_errors", "tx_errors",
1982 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1983 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1984 "rx_dropped", "tx_aborted_errors", "tx_packets",
1985 "rx_errors", "tx_bytes", "tx_window_errors",
1986 "rx_fifo_errors", "tx_carrier_errors",
1987 };
1988 char buf[64];
1989 int stats_dir;
1990 int i;
1991 uint64_t val = 0;
1992
1993 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1994 stats_dir = open(buf, O_DIRECTORY);
1995 if (stats_dir < 0)
1996 return -1;
1997
1998 for (i = 0; i < ARRAY_SIZE(counters); i++)
1999 if (read_uint64_file(stats_dir, counters[i], &val))
2000 blobmsg_add_u64(b, counters[i], val);
2001
2002 close(stats_dir);
2003 return 0;
2004 }
2005
2006 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2007 {
2008 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2009 int alen = v4 ? 4 : 16;
2010 unsigned int flags = 0;
2011 struct ifaddrmsg ifa = {
2012 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2013 .ifa_prefixlen = addr->mask,
2014 .ifa_index = dev->ifindex,
2015 };
2016
2017 struct nl_msg *msg;
2018 if (cmd == RTM_NEWADDR)
2019 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2020
2021 msg = nlmsg_alloc_simple(cmd, flags);
2022 if (!msg)
2023 return -1;
2024
2025 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2026 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2027 if (v4) {
2028 if (addr->broadcast)
2029 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2030 if (addr->point_to_point)
2031 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2032 } else {
2033 time_t now = system_get_rtime();
2034 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2035
2036 if (addr->preferred_until) {
2037 int64_t preferred = addr->preferred_until - now;
2038 if (preferred < 0)
2039 preferred = 0;
2040 else if (preferred > UINT32_MAX)
2041 preferred = UINT32_MAX;
2042
2043 cinfo.ifa_prefered = preferred;
2044 }
2045
2046 if (addr->valid_until) {
2047 int64_t valid = addr->valid_until - now;
2048 if (valid <= 0) {
2049 nlmsg_free(msg);
2050 return -1;
2051 }
2052 else if (valid > UINT32_MAX)
2053 valid = UINT32_MAX;
2054
2055 cinfo.ifa_valid = valid;
2056 }
2057
2058 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2059
2060 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2061 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2062 }
2063
2064 return system_rtnl_call(msg);
2065 }
2066
2067 int system_add_address(struct device *dev, struct device_addr *addr)
2068 {
2069 return system_addr(dev, addr, RTM_NEWADDR);
2070 }
2071
2072 int system_del_address(struct device *dev, struct device_addr *addr)
2073 {
2074 return system_addr(dev, addr, RTM_DELADDR);
2075 }
2076
2077 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2078 {
2079 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2080 unsigned int flags = 0;
2081 struct ndmsg ndm = {
2082 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2083 .ndm_ifindex = dev->ifindex,
2084 .ndm_state = NUD_PERMANENT,
2085 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2086 };
2087 struct nl_msg *msg;
2088
2089 if (cmd == RTM_NEWNEIGH)
2090 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2091
2092 msg = nlmsg_alloc_simple(cmd, flags);
2093
2094 if (!msg)
2095 return -1;
2096
2097 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2098
2099 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2100 if (neighbor->flags & DEVNEIGH_MAC)
2101 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2102
2103
2104 return system_rtnl_call(msg);
2105 }
2106
2107 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2108 {
2109 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2110 }
2111
2112 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2113 {
2114 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2115 }
2116
2117 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2118 {
2119 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2120 bool have_gw;
2121 unsigned int flags = 0;
2122
2123 if (alen == 4)
2124 have_gw = !!route->nexthop.in.s_addr;
2125 else
2126 have_gw = route->nexthop.in6.s6_addr32[0] ||
2127 route->nexthop.in6.s6_addr32[1] ||
2128 route->nexthop.in6.s6_addr32[2] ||
2129 route->nexthop.in6.s6_addr32[3];
2130
2131 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2132 ? route->table : RT_TABLE_MAIN;
2133
2134 struct rtmsg rtm = {
2135 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2136 .rtm_dst_len = route->mask,
2137 .rtm_src_len = route->sourcemask,
2138 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2139 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2140 .rtm_scope = RT_SCOPE_NOWHERE,
2141 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2142 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2143 };
2144 struct nl_msg *msg;
2145
2146 if (cmd == RTM_NEWROUTE) {
2147 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2148
2149 if (!dev) { /* Add null-route */
2150 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2151 rtm.rtm_type = RTN_UNREACHABLE;
2152 }
2153 else
2154 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2155 }
2156
2157 if (route->flags & DEVROUTE_TYPE) {
2158 rtm.rtm_type = route->type;
2159 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2160 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2161 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2162 rtm.rtm_table = RT_TABLE_LOCAL;
2163 }
2164
2165 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2166 rtm.rtm_scope = RT_SCOPE_HOST;
2167 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2168 rtm.rtm_type == RTN_ANYCAST) {
2169 rtm.rtm_scope = RT_SCOPE_LINK;
2170 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2171 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2172 rtm.rtm_type == RTN_THROW) {
2173 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2174 dev = NULL;
2175 }
2176 }
2177
2178 msg = nlmsg_alloc_simple(cmd, flags);
2179 if (!msg)
2180 return -1;
2181
2182 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2183
2184 if (route->mask)
2185 nla_put(msg, RTA_DST, alen, &route->addr);
2186
2187 if (route->sourcemask) {
2188 if (rtm.rtm_family == AF_INET)
2189 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2190 else
2191 nla_put(msg, RTA_SRC, alen, &route->source);
2192 }
2193
2194 if (route->metric > 0)
2195 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2196
2197 if (have_gw)
2198 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2199
2200 if (dev)
2201 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2202
2203 if (table >= 256)
2204 nla_put_u32(msg, RTA_TABLE, table);
2205
2206 if (route->flags & DEVROUTE_MTU) {
2207 struct nlattr *metrics;
2208
2209 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2210 goto nla_put_failure;
2211
2212 nla_put_u32(msg, RTAX_MTU, route->mtu);
2213
2214 nla_nest_end(msg, metrics);
2215 }
2216
2217 return system_rtnl_call(msg);
2218
2219 nla_put_failure:
2220 nlmsg_free(msg);
2221 return -ENOMEM;
2222 }
2223
2224 int system_add_route(struct device *dev, struct device_route *route)
2225 {
2226 return system_rt(dev, route, RTM_NEWROUTE);
2227 }
2228
2229 int system_del_route(struct device *dev, struct device_route *route)
2230 {
2231 return system_rt(dev, route, RTM_DELROUTE);
2232 }
2233
2234 int system_flush_routes(void)
2235 {
2236 const char *names[] = {
2237 "/proc/sys/net/ipv4/route/flush",
2238 "/proc/sys/net/ipv6/route/flush"
2239 };
2240 int fd, i;
2241
2242 for (i = 0; i < ARRAY_SIZE(names); i++) {
2243 fd = open(names[i], O_WRONLY);
2244 if (fd < 0)
2245 continue;
2246
2247 if (write(fd, "-1", 2)) {}
2248 close(fd);
2249 }
2250 return 0;
2251 }
2252
2253 bool system_resolve_rt_type(const char *type, unsigned int *id)
2254 {
2255 return system_rtn_aton(type, id);
2256 }
2257
2258 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2259 {
2260 FILE *f;
2261 char *e, buf[128];
2262 unsigned int n, proto = 256;
2263 n = strtoul(type, &e, 0);
2264 if (!*e && e != type)
2265 proto = n;
2266 else if (!strcmp(type, "unspec"))
2267 proto = RTPROT_UNSPEC;
2268 else if (!strcmp(type, "kernel"))
2269 proto = RTPROT_KERNEL;
2270 else if (!strcmp(type, "boot"))
2271 proto = RTPROT_BOOT;
2272 else if (!strcmp(type, "static"))
2273 proto = RTPROT_STATIC;
2274 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2275 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2276 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2277 continue;
2278
2279 n = strtoul(e, NULL, 10);
2280 e = strtok(NULL, " \t\n");
2281
2282 if (e && !strcmp(e, type)) {
2283 proto = n;
2284 break;
2285 }
2286 }
2287 fclose(f);
2288 }
2289
2290 if (proto > 255)
2291 return false;
2292
2293 *id = proto;
2294 return true;
2295 }
2296
2297 bool system_resolve_rt_table(const char *name, unsigned int *id)
2298 {
2299 FILE *f;
2300 char *e, buf[128];
2301 unsigned int n, table = RT_TABLE_UNSPEC;
2302
2303 /* first try to parse table as number */
2304 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2305 table = n;
2306
2307 /* handle well known aliases */
2308 else if (!strcmp(name, "default"))
2309 table = RT_TABLE_DEFAULT;
2310 else if (!strcmp(name, "main"))
2311 table = RT_TABLE_MAIN;
2312 else if (!strcmp(name, "local"))
2313 table = RT_TABLE_LOCAL;
2314
2315 /* try to look up name in /etc/iproute2/rt_tables */
2316 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2317 {
2318 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2319 {
2320 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2321 continue;
2322
2323 n = strtoul(e, NULL, 10);
2324 e = strtok(NULL, " \t\n");
2325
2326 if (e && !strcmp(e, name))
2327 {
2328 table = n;
2329 break;
2330 }
2331 }
2332
2333 fclose(f);
2334 }
2335
2336 if (table == RT_TABLE_UNSPEC)
2337 return false;
2338
2339 *id = table;
2340 return true;
2341 }
2342
2343 bool system_is_default_rt_table(unsigned int id)
2344 {
2345 return (id == RT_TABLE_MAIN);
2346 }
2347
2348 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2349 {
2350 char *e;
2351 unsigned int n;
2352
2353 if (!strcmp(filter, "strict"))
2354 n = 1;
2355 else if (!strcmp(filter, "loose"))
2356 n = 2;
2357 else {
2358 n = strtoul(filter, &e, 0);
2359 if (*e || e == filter || n > 2)
2360 return false;
2361 }
2362
2363 *id = n;
2364 return true;
2365 }
2366
2367 static int system_iprule(struct iprule *rule, int cmd)
2368 {
2369 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2370
2371 struct nl_msg *msg;
2372 struct rtmsg rtm = {
2373 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2374 .rtm_protocol = RTPROT_STATIC,
2375 .rtm_scope = RT_SCOPE_UNIVERSE,
2376 .rtm_table = RT_TABLE_UNSPEC,
2377 .rtm_type = RTN_UNSPEC,
2378 .rtm_flags = 0,
2379 };
2380
2381 if (cmd == RTM_NEWRULE)
2382 rtm.rtm_type = RTN_UNICAST;
2383
2384 if (rule->invert)
2385 rtm.rtm_flags |= FIB_RULE_INVERT;
2386
2387 if (rule->flags & IPRULE_SRC)
2388 rtm.rtm_src_len = rule->src_mask;
2389
2390 if (rule->flags & IPRULE_DEST)
2391 rtm.rtm_dst_len = rule->dest_mask;
2392
2393 if (rule->flags & IPRULE_TOS)
2394 rtm.rtm_tos = rule->tos;
2395
2396 if (rule->flags & IPRULE_LOOKUP) {
2397 if (rule->lookup < 256)
2398 rtm.rtm_table = rule->lookup;
2399 }
2400
2401 if (rule->flags & IPRULE_ACTION)
2402 rtm.rtm_type = rule->action;
2403 else if (rule->flags & IPRULE_GOTO)
2404 rtm.rtm_type = FR_ACT_GOTO;
2405 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2406 rtm.rtm_type = FR_ACT_NOP;
2407
2408 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2409
2410 if (!msg)
2411 return -1;
2412
2413 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2414
2415 if (rule->flags & IPRULE_IN)
2416 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2417
2418 if (rule->flags & IPRULE_OUT)
2419 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2420
2421 if (rule->flags & IPRULE_SRC)
2422 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2423
2424 if (rule->flags & IPRULE_DEST)
2425 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2426
2427 if (rule->flags & IPRULE_PRIORITY)
2428 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2429 else if (cmd == RTM_NEWRULE)
2430 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2431
2432 if (rule->flags & IPRULE_FWMARK)
2433 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2434
2435 if (rule->flags & IPRULE_FWMASK)
2436 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2437
2438 if (rule->flags & IPRULE_LOOKUP) {
2439 if (rule->lookup >= 256)
2440 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2441 }
2442
2443 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2444 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2445
2446 if (rule->flags & IPRULE_GOTO)
2447 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2448
2449 return system_rtnl_call(msg);
2450 }
2451
2452 int system_add_iprule(struct iprule *rule)
2453 {
2454 return system_iprule(rule, RTM_NEWRULE);
2455 }
2456
2457 int system_del_iprule(struct iprule *rule)
2458 {
2459 return system_iprule(rule, RTM_DELRULE);
2460 }
2461
2462 int system_flush_iprules(void)
2463 {
2464 int rv = 0;
2465 struct iprule rule;
2466
2467 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2468 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2469
2470 memset(&rule, 0, sizeof(rule));
2471
2472
2473 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2474
2475 rule.priority = 0;
2476 rule.lookup = RT_TABLE_LOCAL;
2477 rv |= system_iprule(&rule, RTM_NEWRULE);
2478
2479 rule.priority = 32766;
2480 rule.lookup = RT_TABLE_MAIN;
2481 rv |= system_iprule(&rule, RTM_NEWRULE);
2482
2483 rule.priority = 32767;
2484 rule.lookup = RT_TABLE_DEFAULT;
2485 rv |= system_iprule(&rule, RTM_NEWRULE);
2486
2487
2488 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2489
2490 rule.priority = 0;
2491 rule.lookup = RT_TABLE_LOCAL;
2492 rv |= system_iprule(&rule, RTM_NEWRULE);
2493
2494 rule.priority = 32766;
2495 rule.lookup = RT_TABLE_MAIN;
2496 rv |= system_iprule(&rule, RTM_NEWRULE);
2497
2498 return rv;
2499 }
2500
2501 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2502 {
2503 return system_rtn_aton(action, id);
2504 }
2505
2506 time_t system_get_rtime(void)
2507 {
2508 struct timespec ts;
2509 struct timeval tv;
2510
2511 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2512 return ts.tv_sec;
2513
2514 if (gettimeofday(&tv, NULL) == 0)
2515 return tv.tv_sec;
2516
2517 return 0;
2518 }
2519
2520 #ifndef IP_DF
2521 #define IP_DF 0x4000
2522 #endif
2523
2524 static int tunnel_ioctl(const char *name, int cmd, void *p)
2525 {
2526 struct ifreq ifr;
2527
2528 memset(&ifr, 0, sizeof(ifr));
2529 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2530 ifr.ifr_ifru.ifru_data = p;
2531 return ioctl(sock_ioctl, cmd, &ifr);
2532 }
2533
2534 #ifdef IFLA_IPTUN_MAX
2535 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2536 struct blob_attr **tb)
2537 {
2538 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2539 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2540 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2541 struct blob_attr *cur;
2542 int ret = 0, ttl = 0;
2543
2544 if (!nlm)
2545 return -1;
2546
2547 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2548 nla_put_string(nlm, IFLA_IFNAME, name);
2549
2550 if (link)
2551 nla_put_u32(nlm, IFLA_LINK, link);
2552
2553 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2554 if (!linkinfo) {
2555 ret = -ENOMEM;
2556 goto failure;
2557 }
2558
2559 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2560 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2561 if (!infodata) {
2562 ret = -ENOMEM;
2563 goto failure;
2564 }
2565
2566 if (link)
2567 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2568
2569 if ((cur = tb[TUNNEL_ATTR_TTL]))
2570 ttl = blobmsg_get_u32(cur);
2571
2572 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2573 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2574
2575 struct in6_addr in6buf;
2576 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2577 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2578 ret = -EINVAL;
2579 goto failure;
2580 }
2581 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2582 }
2583
2584 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2585 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2586 ret = -EINVAL;
2587 goto failure;
2588 }
2589 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2590 }
2591
2592 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2593 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2594 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2595
2596 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2597 blobmsg_data(cur), blobmsg_len(cur));
2598
2599 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2600 char *str = blobmsg_get_string(cur);
2601
2602 if (strcmp(str, "ignore")) {
2603 char *e;
2604 unsigned encap_limit = strtoul(str, &e, 0);
2605
2606 if (e == str || *e || encap_limit > 255) {
2607 ret = -EINVAL;
2608 goto failure;
2609 }
2610
2611 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2612 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2613 }
2614 }
2615
2616 #ifdef IFLA_IPTUN_FMR_MAX
2617 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2618 struct blob_attr *rcur;
2619 unsigned rrem, fmrcnt = 0;
2620 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2621
2622 if (!fmrs) {
2623 ret = -ENOMEM;
2624 goto failure;
2625 }
2626
2627 blobmsg_for_each_attr(rcur, cur, rrem) {
2628 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2629 struct in6_addr ip6prefix;
2630 struct in_addr ip4prefix;
2631 unsigned ip4len, ip6len, ealen, offset;
2632
2633 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2634 blobmsg_data(rcur), blobmsg_len(rcur));
2635
2636 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2637 !parse_ip_and_netmask(AF_INET6,
2638 blobmsg_data(tb_cur), &ip6prefix,
2639 &ip6len)) {
2640 ret = -EINVAL;
2641 goto failure;
2642 }
2643
2644 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2645 !parse_ip_and_netmask(AF_INET,
2646 blobmsg_data(tb_cur), &ip4prefix,
2647 &ip4len)) {
2648 ret = -EINVAL;
2649 goto failure;
2650 }
2651
2652 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2653 ret = -EINVAL;
2654 goto failure;
2655 }
2656 ealen = blobmsg_get_u32(tb_cur);
2657
2658 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2659 ret = -EINVAL;
2660 goto failure;
2661 }
2662 offset = blobmsg_get_u32(tb_cur);
2663
2664 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2665 if (!rule) {
2666 ret = -ENOMEM;
2667 goto failure;
2668 }
2669
2670 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2671 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2672 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2673 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2674 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2675 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2676
2677 nla_nest_end(nlm, rule);
2678 }
2679
2680 nla_nest_end(nlm, fmrs);
2681 }
2682 #endif
2683 if (tun_flags)
2684 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2685 }
2686
2687 nla_nest_end(nlm, infodata);
2688 nla_nest_end(nlm, linkinfo);
2689
2690 return system_rtnl_call(nlm);
2691
2692 failure:
2693 nlmsg_free(nlm);
2694 return ret;
2695 }
2696 #endif
2697
2698 #ifdef IFLA_IPTUN_MAX
2699 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2700 static int system_add_gre_tunnel(const char *name, const char *kind,
2701 const unsigned int link, struct blob_attr **tb, bool v6)
2702 {
2703 struct nl_msg *nlm;
2704 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2705 struct blob_attr *cur;
2706 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2707 uint16_t iflags = 0, oflags = 0;
2708 uint8_t tos = 0;
2709 int ret = 0, ttl = 0;
2710 unsigned encap_limit = 0;
2711
2712 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2713 if (!nlm)
2714 return -1;
2715
2716 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2717 nla_put_string(nlm, IFLA_IFNAME, name);
2718
2719 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2720 if (!linkinfo) {
2721 ret = -ENOMEM;
2722 goto failure;
2723 }
2724
2725 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2726 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2727 if (!infodata) {
2728 ret = -ENOMEM;
2729 goto failure;
2730 }
2731
2732 if (link)
2733 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2734
2735 if ((cur = tb[TUNNEL_ATTR_TTL]))
2736 ttl = blobmsg_get_u32(cur);
2737
2738 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2739 char *str = blobmsg_get_string(cur);
2740 if (strcmp(str, "inherit")) {
2741 unsigned uval;
2742
2743 if (!system_tos_aton(str, &uval)) {
2744 ret = -EINVAL;
2745 goto failure;
2746 }
2747
2748 if (v6)
2749 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2750 else
2751 tos = uval;
2752 } else {
2753 if (v6)
2754 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2755 else
2756 tos = 1;
2757 }
2758 }
2759
2760 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2761 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2762
2763 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2764 blobmsg_data(cur), blobmsg_len(cur));
2765
2766 if ((cur = tb_data[GRE_DATA_IKEY])) {
2767 if ((ikey = blobmsg_get_u32(cur)))
2768 iflags |= GRE_KEY;
2769 }
2770
2771 if ((cur = tb_data[GRE_DATA_OKEY])) {
2772 if ((okey = blobmsg_get_u32(cur)))
2773 oflags |= GRE_KEY;
2774 }
2775
2776 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2777 if (blobmsg_get_bool(cur))
2778 iflags |= GRE_CSUM;
2779 }
2780
2781 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2782 if (blobmsg_get_bool(cur))
2783 oflags |= GRE_CSUM;
2784 }
2785
2786 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2787 if (blobmsg_get_bool(cur))
2788 iflags |= GRE_SEQ;
2789 }
2790
2791 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2792 if (blobmsg_get_bool(cur))
2793 oflags |= GRE_SEQ;
2794 }
2795
2796 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2797 char *str = blobmsg_get_string(cur);
2798
2799 if (strcmp(str, "ignore")) {
2800 char *e;
2801
2802 encap_limit = strtoul(str, &e, 0);
2803
2804 if (e == str || *e || encap_limit > 255) {
2805 ret = -EINVAL;
2806 goto failure;
2807 }
2808
2809 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2810 }
2811 }
2812 }
2813
2814 if (v6) {
2815 struct in6_addr in6buf;
2816 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2817 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2818 ret = -EINVAL;
2819 goto failure;
2820 }
2821 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2822 }
2823
2824 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2825 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2826 ret = -EINVAL;
2827 goto failure;
2828 }
2829 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2830 }
2831
2832 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2833 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2834
2835 if (flowinfo)
2836 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2837
2838 if (flags6)
2839 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2840
2841 if (!ttl)
2842 ttl = 64;
2843 } else {
2844 struct in_addr inbuf;
2845 bool set_df = true;
2846
2847 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2848 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2849 ret = -EINVAL;
2850 goto failure;
2851 }
2852 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2853 }
2854
2855 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2856 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2857 ret = -EINVAL;
2858 goto failure;
2859 }
2860 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2861
2862 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2863 if (!okey) {
2864 okey = inbuf.s_addr;
2865 oflags |= GRE_KEY;
2866 }
2867
2868 if (!ikey) {
2869 ikey = inbuf.s_addr;
2870 iflags |= GRE_KEY;
2871 }
2872 }
2873 }
2874
2875 if ((cur = tb[TUNNEL_ATTR_DF]))
2876 set_df = blobmsg_get_bool(cur);
2877
2878 if (!set_df) {
2879 /* ttl != 0 and nopmtudisc are incompatible */
2880 if (ttl) {
2881 ret = -EINVAL;
2882 goto failure;
2883 }
2884 } else if (!ttl)
2885 ttl = 64;
2886
2887 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2888
2889 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2890 }
2891
2892 if (ttl)
2893 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2894
2895 if (oflags)
2896 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2897
2898 if (iflags)
2899 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2900
2901 if (okey)
2902 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2903
2904 if (ikey)
2905 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2906
2907 nla_nest_end(nlm, infodata);
2908 nla_nest_end(nlm, linkinfo);
2909
2910 return system_rtnl_call(nlm);
2911
2912 failure:
2913 nlmsg_free(nlm);
2914 return ret;
2915 }
2916 #endif
2917
2918 #ifdef IFLA_VTI_MAX
2919 static int system_add_vti_tunnel(const char *name, const char *kind,
2920 const unsigned int link, struct blob_attr **tb, bool v6)
2921 {
2922 struct nl_msg *nlm;
2923 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2924 struct blob_attr *cur;
2925 int ret = 0;
2926
2927 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2928 if (!nlm)
2929 return -1;
2930
2931 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2932 nla_put_string(nlm, IFLA_IFNAME, name);
2933
2934 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2935 if (!linkinfo) {
2936 ret = -ENOMEM;
2937 goto failure;
2938 }
2939
2940 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2941 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2942 if (!infodata) {
2943 ret = -ENOMEM;
2944 goto failure;
2945 }
2946
2947 if (link)
2948 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2949
2950 if (v6) {
2951 struct in6_addr in6buf;
2952 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2953 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2954 ret = -EINVAL;
2955 goto failure;
2956 }
2957 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2958 }
2959
2960 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2961 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2962 ret = -EINVAL;
2963 goto failure;
2964 }
2965 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2966 }
2967
2968 } else {
2969 struct in_addr inbuf;
2970
2971 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2972 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2973 ret = -EINVAL;
2974 goto failure;
2975 }
2976 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2977 }
2978
2979 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2980 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2981 ret = -EINVAL;
2982 goto failure;
2983 }
2984 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2985 }
2986
2987 }
2988
2989 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2990 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2991 uint32_t ikey = 0, okey = 0;
2992
2993 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2994 blobmsg_data(cur), blobmsg_len(cur));
2995
2996 if ((cur = tb_data[VTI_DATA_IKEY])) {
2997 if ((ikey = blobmsg_get_u32(cur)))
2998 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2999 }
3000
3001 if ((cur = tb_data[VTI_DATA_OKEY])) {
3002 if ((okey = blobmsg_get_u32(cur)))
3003 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3004 }
3005 }
3006
3007 nla_nest_end(nlm, infodata);
3008 nla_nest_end(nlm, linkinfo);
3009
3010 return system_rtnl_call(nlm);
3011
3012 failure:
3013 nlmsg_free(nlm);
3014 return ret;
3015 }
3016 #endif
3017
3018 #ifdef IFLA_XFRM_MAX
3019 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3020 const unsigned int link, struct blob_attr **tb)
3021 {
3022 struct nl_msg *nlm;
3023 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3024 struct blob_attr *cur;
3025 int ret = 0;
3026
3027 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3028 if (!nlm)
3029 return -1;
3030
3031 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3032 nla_put_string(nlm, IFLA_IFNAME, name);
3033
3034 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3035 if (!linkinfo) {
3036 ret = -ENOMEM;
3037 goto failure;
3038 }
3039
3040 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3041 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3042 if (!infodata) {
3043 ret = -ENOMEM;
3044 goto failure;
3045 }
3046
3047 if (link)
3048 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3049
3050 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3051 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3052 uint32_t if_id = 0;
3053
3054 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3055 blobmsg_data(cur), blobmsg_len(cur));
3056
3057 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3058 if ((if_id = blobmsg_get_u32(cur)))
3059 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3060 }
3061
3062 }
3063
3064 nla_nest_end(nlm, infodata);
3065 nla_nest_end(nlm, linkinfo);
3066
3067 return system_rtnl_call(nlm);
3068
3069 failure:
3070 nlmsg_free(nlm);
3071 return ret;
3072 }
3073 #endif
3074
3075 #ifdef IFLA_VXLAN_MAX
3076 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3077 {
3078 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3079 struct nl_msg *msg;
3080 struct nlattr *linkinfo, *data;
3081 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3082 struct blob_attr *cur;
3083 int ret = 0;
3084
3085 if ((cur = tb[TUNNEL_ATTR_DATA]))
3086 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3087 blobmsg_data(cur), blobmsg_len(cur));
3088 else
3089 return -EINVAL;
3090
3091 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3092
3093 if (!msg)
3094 return -1;
3095
3096 nlmsg_append(msg, &iim, sizeof(iim), 0);
3097
3098 nla_put_string(msg, IFLA_IFNAME, name);
3099
3100 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3101 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3102 if (!ea) {
3103 ret = -EINVAL;
3104 goto failure;
3105 }
3106
3107 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3108 }
3109
3110 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3111 uint32_t mtu = blobmsg_get_u32(cur);
3112 nla_put_u32(msg, IFLA_MTU, mtu);
3113 }
3114
3115 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3116 ret = -ENOMEM;
3117 goto failure;
3118 }
3119
3120 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3121
3122 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3123 ret = -ENOMEM;
3124 goto failure;
3125 }
3126
3127 if (link)
3128 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3129
3130 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3131 uint32_t id = blobmsg_get_u32(cur);
3132 if (id >= (1u << 24) - 1) {
3133 ret = -EINVAL;
3134 goto failure;
3135 }
3136
3137 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3138 }
3139
3140 if (v6) {
3141 struct in6_addr in6buf;
3142 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3143 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3144 ret = -EINVAL;
3145 goto failure;
3146 }
3147 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3148 }
3149
3150 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3151 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3152 ret = -EINVAL;
3153 goto failure;
3154 }
3155 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3156 }
3157 } else {
3158 struct in_addr inbuf;
3159
3160 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3161 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3162 ret = -EINVAL;
3163 goto failure;
3164 }
3165 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3166 }
3167
3168 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3169 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3170 ret = -EINVAL;
3171 goto failure;
3172 }
3173 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3174 }
3175 }
3176
3177 uint32_t port = 4789;
3178 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3179 port = blobmsg_get_u32(cur);
3180 if (port < 1 || port > 65535) {
3181 ret = -EINVAL;
3182 goto failure;
3183 }
3184 }
3185 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3186
3187 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
3188 bool rxcsum = blobmsg_get_bool(cur);
3189 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
3190 }
3191
3192 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
3193 bool txcsum = blobmsg_get_bool(cur);
3194 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
3195 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
3196 }
3197
3198 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3199 char *str = blobmsg_get_string(cur);
3200 unsigned tos = 1;
3201
3202 if (strcmp(str, "inherit")) {
3203 if (!system_tos_aton(str, &tos)) {
3204 ret = -EINVAL;
3205 goto failure;
3206 }
3207 }
3208
3209 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3210 }
3211
3212 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3213 uint32_t ttl = blobmsg_get_u32(cur);
3214 if (ttl < 1 || ttl > 255) {
3215 ret = -EINVAL;
3216 goto failure;
3217 }
3218
3219 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3220 }
3221
3222 nla_nest_end(msg, data);
3223 nla_nest_end(msg, linkinfo);
3224
3225 ret = system_rtnl_call(msg);
3226 if (ret)
3227 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3228
3229 return ret;
3230
3231 failure:
3232 nlmsg_free(msg);
3233 return ret;
3234 }
3235 #endif
3236
3237 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3238 {
3239 struct blob_attr *cur;
3240 int ret = 0;
3241
3242 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3243 return -1;
3244
3245 #ifdef SIOCADD6RD
3246 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3247 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3248 unsigned int mask;
3249 struct ip_tunnel_6rd p6;
3250
3251 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3252 blobmsg_data(cur), blobmsg_len(cur));
3253
3254 memset(&p6, 0, sizeof(p6));
3255
3256 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3257 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3258 &p6.prefix, &mask) || mask > 128) {
3259 ret = -EINVAL;
3260 goto failure;
3261 }
3262
3263 p6.prefixlen = mask;
3264 }
3265
3266 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3267 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3268 &p6.relay_prefix, &mask) || mask > 32) {
3269 ret = -EINVAL;
3270 goto failure;
3271 }
3272
3273 p6.relay_prefixlen = mask;
3274 }
3275
3276 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3277 ret = -1;
3278 goto failure;
3279 }
3280 }
3281 #endif
3282
3283 return ret;
3284
3285 failure:
3286 __system_del_ip_tunnel(name, tb);
3287 return ret;
3288 }
3289
3290 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3291 {
3292 struct blob_attr *cur;
3293 bool set_df = true;
3294 struct ip_tunnel_parm p = {
3295 .link = link,
3296 .iph = {
3297 .version = 4,
3298 .ihl = 5,
3299 .protocol = proto,
3300 }
3301 };
3302
3303 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3304 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3305 return -EINVAL;
3306
3307 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3308 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3309 return -EINVAL;
3310
3311 if ((cur = tb[TUNNEL_ATTR_DF]))
3312 set_df = blobmsg_get_bool(cur);
3313
3314 if ((cur = tb[TUNNEL_ATTR_TTL]))
3315 p.iph.ttl = blobmsg_get_u32(cur);
3316
3317 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3318 char *str = blobmsg_get_string(cur);
3319 if (strcmp(str, "inherit")) {
3320 unsigned uval;
3321
3322 if (!system_tos_aton(str, &uval))
3323 return -EINVAL;
3324
3325 p.iph.tos = uval;
3326 } else
3327 p.iph.tos = 1;
3328 }
3329
3330 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3331 /* ttl !=0 and nopmtudisc are incompatible */
3332 if (p.iph.ttl && p.iph.frag_off == 0)
3333 return -EINVAL;
3334
3335 strncpy(p.name, name, sizeof(p.name) - 1);
3336
3337 switch (p.iph.protocol) {
3338 case IPPROTO_IPIP:
3339 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3340 case IPPROTO_IPV6:
3341 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3342 default:
3343 break;
3344 }
3345 return -1;
3346 }
3347
3348 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3349 {
3350 struct blob_attr *cur;
3351 const char *str;
3352
3353 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3354 return -EINVAL;
3355 str = blobmsg_data(cur);
3356
3357 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3358 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3359 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3360 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3361 !strcmp(str, "xfrm"))
3362 return system_link_del(name);
3363 else
3364 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3365 }
3366
3367 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3368 {
3369 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3370
3371 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3372 blob_data(attr), blob_len(attr));
3373
3374 return __system_del_ip_tunnel(name, tb);
3375 }
3376
3377 int system_update_ipv6_mtu(struct device *dev, int mtu)
3378 {
3379 int ret = -1;
3380 char buf[64];
3381 int fd;
3382
3383 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3384 dev->ifname);
3385
3386 fd = open(buf, O_RDWR);
3387 if (fd < 0)
3388 return ret;
3389
3390 if (!mtu) {
3391 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3392 if (len < 0)
3393 goto out;
3394
3395 buf[len] = 0;
3396 ret = atoi(buf);
3397 } else {
3398 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3399 ret = mtu;
3400 }
3401
3402 out:
3403 close(fd);
3404 return ret;
3405 }
3406
3407 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3408 {
3409 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3410 struct blob_attr *cur;
3411 const char *str;
3412
3413 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3414 blob_data(attr), blob_len(attr));
3415
3416 __system_del_ip_tunnel(name, tb);
3417
3418 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3419 return -EINVAL;
3420 str = blobmsg_data(cur);
3421
3422 unsigned int ttl = 0;
3423 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3424 ttl = blobmsg_get_u32(cur);
3425 if (ttl > 255)
3426 return -EINVAL;
3427 }
3428
3429 unsigned int link = 0;
3430 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3431 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3432 if (!iface)
3433 return -EINVAL;
3434
3435 if (iface->l3_dev.dev)
3436 link = iface->l3_dev.dev->ifindex;
3437 }
3438
3439 if (!strcmp(str, "sit"))
3440 return system_add_sit_tunnel(name, link, tb);
3441 #ifdef IFLA_IPTUN_MAX
3442 else if (!strcmp(str, "ipip6")) {
3443 return system_add_ip6_tunnel(name, link, tb);
3444 } else if (!strcmp(str, "greip")) {
3445 return system_add_gre_tunnel(name, "gre", link, tb, false);
3446 } else if (!strcmp(str, "gretapip")) {
3447 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3448 } else if (!strcmp(str, "greip6")) {
3449 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3450 } else if (!strcmp(str, "gretapip6")) {
3451 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3452 #ifdef IFLA_VTI_MAX
3453 } else if (!strcmp(str, "vtiip")) {
3454 return system_add_vti_tunnel(name, "vti", link, tb, false);
3455 } else if (!strcmp(str, "vtiip6")) {
3456 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3457 #endif
3458 #ifdef IFLA_XFRM_MAX
3459 } else if (!strcmp(str, "xfrm")) {
3460 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3461 #endif
3462 #ifdef IFLA_VXLAN_MAX
3463 } else if(!strcmp(str, "vxlan")) {
3464 return system_add_vxlan(name, link, tb, false);
3465 } else if(!strcmp(str, "vxlan6")) {
3466 return system_add_vxlan(name, link, tb, true);
3467 #endif
3468 #endif
3469 } else if (!strcmp(str, "ipip")) {
3470 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3471 }
3472 else
3473 return -EINVAL;
3474
3475 return 0;
3476 }
OpenWrt Network interface configuration daemon