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