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