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