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