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interface: add neighbor config support
[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 int rval = system_neigh(dev, neighbor, RTM_DELNEIGH);
1977 netifd_log_message(L_NOTICE,"return delete %d", rval);
1978 return rval;
1979 }
1980
1981 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1982 {
1983 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1984 bool have_gw;
1985 unsigned int flags = 0;
1986
1987 if (alen == 4)
1988 have_gw = !!route->nexthop.in.s_addr;
1989 else
1990 have_gw = route->nexthop.in6.s6_addr32[0] ||
1991 route->nexthop.in6.s6_addr32[1] ||
1992 route->nexthop.in6.s6_addr32[2] ||
1993 route->nexthop.in6.s6_addr32[3];
1994
1995 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1996 ? route->table : RT_TABLE_MAIN;
1997
1998 struct rtmsg rtm = {
1999 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2000 .rtm_dst_len = route->mask,
2001 .rtm_src_len = route->sourcemask,
2002 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2003 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2004 .rtm_scope = RT_SCOPE_NOWHERE,
2005 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2006 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2007 };
2008 struct nl_msg *msg;
2009
2010 if (cmd == RTM_NEWROUTE) {
2011 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2012
2013 if (!dev) { /* Add null-route */
2014 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2015 rtm.rtm_type = RTN_UNREACHABLE;
2016 }
2017 else
2018 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2019 }
2020
2021 if (route->flags & DEVROUTE_TYPE) {
2022 rtm.rtm_type = route->type;
2023 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2024 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2025 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2026 rtm.rtm_table = RT_TABLE_LOCAL;
2027 }
2028
2029 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2030 rtm.rtm_scope = RT_SCOPE_HOST;
2031 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2032 rtm.rtm_type == RTN_ANYCAST) {
2033 rtm.rtm_scope = RT_SCOPE_LINK;
2034 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2035 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2036 rtm.rtm_type == RTN_THROW) {
2037 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2038 dev = NULL;
2039 }
2040 }
2041
2042 msg = nlmsg_alloc_simple(cmd, flags);
2043 if (!msg)
2044 return -1;
2045
2046 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2047
2048 if (route->mask)
2049 nla_put(msg, RTA_DST, alen, &route->addr);
2050
2051 if (route->sourcemask) {
2052 if (rtm.rtm_family == AF_INET)
2053 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2054 else
2055 nla_put(msg, RTA_SRC, alen, &route->source);
2056 }
2057
2058 if (route->metric > 0)
2059 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2060
2061 if (have_gw)
2062 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2063
2064 if (dev)
2065 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2066
2067 if (table >= 256)
2068 nla_put_u32(msg, RTA_TABLE, table);
2069
2070 if (route->flags & DEVROUTE_MTU) {
2071 struct nlattr *metrics;
2072
2073 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2074 goto nla_put_failure;
2075
2076 nla_put_u32(msg, RTAX_MTU, route->mtu);
2077
2078 nla_nest_end(msg, metrics);
2079 }
2080
2081 return system_rtnl_call(msg);
2082
2083 nla_put_failure:
2084 nlmsg_free(msg);
2085 return -ENOMEM;
2086 }
2087
2088 int system_add_route(struct device *dev, struct device_route *route)
2089 {
2090 return system_rt(dev, route, RTM_NEWROUTE);
2091 }
2092
2093 int system_del_route(struct device *dev, struct device_route *route)
2094 {
2095 return system_rt(dev, route, RTM_DELROUTE);
2096 }
2097
2098 int system_flush_routes(void)
2099 {
2100 const char *names[] = {
2101 "/proc/sys/net/ipv4/route/flush",
2102 "/proc/sys/net/ipv6/route/flush"
2103 };
2104 int fd, i;
2105
2106 for (i = 0; i < ARRAY_SIZE(names); i++) {
2107 fd = open(names[i], O_WRONLY);
2108 if (fd < 0)
2109 continue;
2110
2111 if (write(fd, "-1", 2)) {}
2112 close(fd);
2113 }
2114 return 0;
2115 }
2116
2117 bool system_resolve_rt_type(const char *type, unsigned int *id)
2118 {
2119 return system_rtn_aton(type, id);
2120 }
2121
2122 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2123 {
2124 FILE *f;
2125 char *e, buf[128];
2126 unsigned int n, proto = 256;
2127 n = strtoul(type, &e, 0);
2128 if (!*e && e != type)
2129 proto = n;
2130 else if (!strcmp(type, "unspec"))
2131 proto = RTPROT_UNSPEC;
2132 else if (!strcmp(type, "kernel"))
2133 proto = RTPROT_KERNEL;
2134 else if (!strcmp(type, "boot"))
2135 proto = RTPROT_BOOT;
2136 else if (!strcmp(type, "static"))
2137 proto = RTPROT_STATIC;
2138 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2139 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2140 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2141 continue;
2142
2143 n = strtoul(e, NULL, 10);
2144 e = strtok(NULL, " \t\n");
2145
2146 if (e && !strcmp(e, type)) {
2147 proto = n;
2148 break;
2149 }
2150 }
2151 fclose(f);
2152 }
2153
2154 if (proto > 255)
2155 return false;
2156
2157 *id = proto;
2158 return true;
2159 }
2160
2161 bool system_resolve_rt_table(const char *name, unsigned int *id)
2162 {
2163 FILE *f;
2164 char *e, buf[128];
2165 unsigned int n, table = RT_TABLE_UNSPEC;
2166
2167 /* first try to parse table as number */
2168 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2169 table = n;
2170
2171 /* handle well known aliases */
2172 else if (!strcmp(name, "default"))
2173 table = RT_TABLE_DEFAULT;
2174 else if (!strcmp(name, "main"))
2175 table = RT_TABLE_MAIN;
2176 else if (!strcmp(name, "local"))
2177 table = RT_TABLE_LOCAL;
2178
2179 /* try to look up name in /etc/iproute2/rt_tables */
2180 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2181 {
2182 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2183 {
2184 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2185 continue;
2186
2187 n = strtoul(e, NULL, 10);
2188 e = strtok(NULL, " \t\n");
2189
2190 if (e && !strcmp(e, name))
2191 {
2192 table = n;
2193 break;
2194 }
2195 }
2196
2197 fclose(f);
2198 }
2199
2200 if (table == RT_TABLE_UNSPEC)
2201 return false;
2202
2203 *id = table;
2204 return true;
2205 }
2206
2207 bool system_is_default_rt_table(unsigned int id)
2208 {
2209 return (id == RT_TABLE_MAIN);
2210 }
2211
2212 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2213 {
2214 char *e;
2215 unsigned int n;
2216
2217 if (!strcmp(filter, "strict"))
2218 n = 1;
2219 else if (!strcmp(filter, "loose"))
2220 n = 2;
2221 else {
2222 n = strtoul(filter, &e, 0);
2223 if (*e || e == filter || n > 2)
2224 return false;
2225 }
2226
2227 *id = n;
2228 return true;
2229 }
2230
2231 static int system_iprule(struct iprule *rule, int cmd)
2232 {
2233 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2234
2235 struct nl_msg *msg;
2236 struct rtmsg rtm = {
2237 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2238 .rtm_protocol = RTPROT_STATIC,
2239 .rtm_scope = RT_SCOPE_UNIVERSE,
2240 .rtm_table = RT_TABLE_UNSPEC,
2241 .rtm_type = RTN_UNSPEC,
2242 .rtm_flags = 0,
2243 };
2244
2245 if (cmd == RTM_NEWRULE)
2246 rtm.rtm_type = RTN_UNICAST;
2247
2248 if (rule->invert)
2249 rtm.rtm_flags |= FIB_RULE_INVERT;
2250
2251 if (rule->flags & IPRULE_SRC)
2252 rtm.rtm_src_len = rule->src_mask;
2253
2254 if (rule->flags & IPRULE_DEST)
2255 rtm.rtm_dst_len = rule->dest_mask;
2256
2257 if (rule->flags & IPRULE_TOS)
2258 rtm.rtm_tos = rule->tos;
2259
2260 if (rule->flags & IPRULE_LOOKUP) {
2261 if (rule->lookup < 256)
2262 rtm.rtm_table = rule->lookup;
2263 }
2264
2265 if (rule->flags & IPRULE_ACTION)
2266 rtm.rtm_type = rule->action;
2267 else if (rule->flags & IPRULE_GOTO)
2268 rtm.rtm_type = FR_ACT_GOTO;
2269 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2270 rtm.rtm_type = FR_ACT_NOP;
2271
2272 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2273
2274 if (!msg)
2275 return -1;
2276
2277 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2278
2279 if (rule->flags & IPRULE_IN)
2280 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2281
2282 if (rule->flags & IPRULE_OUT)
2283 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2284
2285 if (rule->flags & IPRULE_SRC)
2286 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2287
2288 if (rule->flags & IPRULE_DEST)
2289 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2290
2291 if (rule->flags & IPRULE_PRIORITY)
2292 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2293 else if (cmd == RTM_NEWRULE)
2294 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2295
2296 if (rule->flags & IPRULE_FWMARK)
2297 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2298
2299 if (rule->flags & IPRULE_FWMASK)
2300 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2301
2302 if (rule->flags & IPRULE_LOOKUP) {
2303 if (rule->lookup >= 256)
2304 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2305 }
2306
2307 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2308 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2309
2310 if (rule->flags & IPRULE_GOTO)
2311 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2312
2313 return system_rtnl_call(msg);
2314 }
2315
2316 int system_add_iprule(struct iprule *rule)
2317 {
2318 return system_iprule(rule, RTM_NEWRULE);
2319 }
2320
2321 int system_del_iprule(struct iprule *rule)
2322 {
2323 return system_iprule(rule, RTM_DELRULE);
2324 }
2325
2326 int system_flush_iprules(void)
2327 {
2328 int rv = 0;
2329 struct iprule rule;
2330
2331 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2332 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2333
2334 memset(&rule, 0, sizeof(rule));
2335
2336
2337 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2338
2339 rule.priority = 0;
2340 rule.lookup = RT_TABLE_LOCAL;
2341 rv |= system_iprule(&rule, RTM_NEWRULE);
2342
2343 rule.priority = 32766;
2344 rule.lookup = RT_TABLE_MAIN;
2345 rv |= system_iprule(&rule, RTM_NEWRULE);
2346
2347 rule.priority = 32767;
2348 rule.lookup = RT_TABLE_DEFAULT;
2349 rv |= system_iprule(&rule, RTM_NEWRULE);
2350
2351
2352 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2353
2354 rule.priority = 0;
2355 rule.lookup = RT_TABLE_LOCAL;
2356 rv |= system_iprule(&rule, RTM_NEWRULE);
2357
2358 rule.priority = 32766;
2359 rule.lookup = RT_TABLE_MAIN;
2360 rv |= system_iprule(&rule, RTM_NEWRULE);
2361
2362 return rv;
2363 }
2364
2365 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2366 {
2367 return system_rtn_aton(action, id);
2368 }
2369
2370 time_t system_get_rtime(void)
2371 {
2372 struct timespec ts;
2373 struct timeval tv;
2374
2375 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2376 return ts.tv_sec;
2377
2378 if (gettimeofday(&tv, NULL) == 0)
2379 return tv.tv_sec;
2380
2381 return 0;
2382 }
2383
2384 #ifndef IP_DF
2385 #define IP_DF 0x4000
2386 #endif
2387
2388 static int tunnel_ioctl(const char *name, int cmd, void *p)
2389 {
2390 struct ifreq ifr;
2391
2392 memset(&ifr, 0, sizeof(ifr));
2393 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2394 ifr.ifr_ifru.ifru_data = p;
2395 return ioctl(sock_ioctl, cmd, &ifr);
2396 }
2397
2398 #ifdef IFLA_IPTUN_MAX
2399 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2400 struct blob_attr **tb)
2401 {
2402 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2403 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2404 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2405 struct blob_attr *cur;
2406 int ret = 0, ttl = 0;
2407
2408 if (!nlm)
2409 return -1;
2410
2411 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2412 nla_put_string(nlm, IFLA_IFNAME, name);
2413
2414 if (link)
2415 nla_put_u32(nlm, IFLA_LINK, link);
2416
2417 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2418 if (!linkinfo) {
2419 ret = -ENOMEM;
2420 goto failure;
2421 }
2422
2423 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2424 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2425 if (!infodata) {
2426 ret = -ENOMEM;
2427 goto failure;
2428 }
2429
2430 if (link)
2431 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2432
2433 if ((cur = tb[TUNNEL_ATTR_TTL]))
2434 ttl = blobmsg_get_u32(cur);
2435
2436 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2437 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2438
2439 struct in6_addr in6buf;
2440 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2441 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2442 ret = -EINVAL;
2443 goto failure;
2444 }
2445 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2446 }
2447
2448 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2449 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2450 ret = -EINVAL;
2451 goto failure;
2452 }
2453 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2454 }
2455
2456 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2457 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2458 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2459
2460 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2461 blobmsg_data(cur), blobmsg_len(cur));
2462
2463 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2464 char *str = blobmsg_get_string(cur);
2465
2466 if (strcmp(str, "ignore")) {
2467 char *e;
2468 unsigned encap_limit = strtoul(str, &e, 0);
2469
2470 if (e == str || *e || encap_limit > 255) {
2471 ret = -EINVAL;
2472 goto failure;
2473 }
2474
2475 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2476 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2477 }
2478 }
2479
2480 #ifdef IFLA_IPTUN_FMR_MAX
2481 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2482 struct blob_attr *rcur;
2483 unsigned rrem, fmrcnt = 0;
2484 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2485
2486 if (!fmrs) {
2487 ret = -ENOMEM;
2488 goto failure;
2489 }
2490
2491 blobmsg_for_each_attr(rcur, cur, rrem) {
2492 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2493 struct in6_addr ip6prefix;
2494 struct in_addr ip4prefix;
2495 unsigned ip4len, ip6len, ealen, offset;
2496
2497 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2498 blobmsg_data(rcur), blobmsg_len(rcur));
2499
2500 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2501 !parse_ip_and_netmask(AF_INET6,
2502 blobmsg_data(tb_cur), &ip6prefix,
2503 &ip6len)) {
2504 ret = -EINVAL;
2505 goto failure;
2506 }
2507
2508 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2509 !parse_ip_and_netmask(AF_INET,
2510 blobmsg_data(tb_cur), &ip4prefix,
2511 &ip4len)) {
2512 ret = -EINVAL;
2513 goto failure;
2514 }
2515
2516 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2517 ret = -EINVAL;
2518 goto failure;
2519 }
2520 ealen = blobmsg_get_u32(tb_cur);
2521
2522 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2523 ret = -EINVAL;
2524 goto failure;
2525 }
2526 offset = blobmsg_get_u32(tb_cur);
2527
2528 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2529 if (!rule) {
2530 ret = -ENOMEM;
2531 goto failure;
2532 }
2533
2534 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2535 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2536 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2537 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2538 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2539 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2540
2541 nla_nest_end(nlm, rule);
2542 }
2543
2544 nla_nest_end(nlm, fmrs);
2545 }
2546 #endif
2547 if (tun_flags)
2548 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2549 }
2550
2551 nla_nest_end(nlm, infodata);
2552 nla_nest_end(nlm, linkinfo);
2553
2554 return system_rtnl_call(nlm);
2555
2556 failure:
2557 nlmsg_free(nlm);
2558 return ret;
2559 }
2560 #endif
2561
2562 #ifdef IFLA_IPTUN_MAX
2563 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2564 static int system_add_gre_tunnel(const char *name, const char *kind,
2565 const unsigned int link, struct blob_attr **tb, bool v6)
2566 {
2567 struct nl_msg *nlm;
2568 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2569 struct blob_attr *cur;
2570 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2571 uint16_t iflags = 0, oflags = 0;
2572 uint8_t tos = 0;
2573 int ret = 0, ttl = 0;
2574 unsigned encap_limit = 0;
2575
2576 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2577 if (!nlm)
2578 return -1;
2579
2580 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2581 nla_put_string(nlm, IFLA_IFNAME, name);
2582
2583 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2584 if (!linkinfo) {
2585 ret = -ENOMEM;
2586 goto failure;
2587 }
2588
2589 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2590 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2591 if (!infodata) {
2592 ret = -ENOMEM;
2593 goto failure;
2594 }
2595
2596 if (link)
2597 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2598
2599 if ((cur = tb[TUNNEL_ATTR_TTL]))
2600 ttl = blobmsg_get_u32(cur);
2601
2602 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2603 char *str = blobmsg_get_string(cur);
2604 if (strcmp(str, "inherit")) {
2605 unsigned uval;
2606
2607 if (!system_tos_aton(str, &uval)) {
2608 ret = -EINVAL;
2609 goto failure;
2610 }
2611
2612 if (v6)
2613 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2614 else
2615 tos = uval;
2616 } else {
2617 if (v6)
2618 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2619 else
2620 tos = 1;
2621 }
2622 }
2623
2624 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2625 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2626
2627 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2628 blobmsg_data(cur), blobmsg_len(cur));
2629
2630 if ((cur = tb_data[GRE_DATA_IKEY])) {
2631 if ((ikey = blobmsg_get_u32(cur)))
2632 iflags |= GRE_KEY;
2633 }
2634
2635 if ((cur = tb_data[GRE_DATA_OKEY])) {
2636 if ((okey = blobmsg_get_u32(cur)))
2637 oflags |= GRE_KEY;
2638 }
2639
2640 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2641 if (blobmsg_get_bool(cur))
2642 iflags |= GRE_CSUM;
2643 }
2644
2645 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2646 if (blobmsg_get_bool(cur))
2647 oflags |= GRE_CSUM;
2648 }
2649
2650 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2651 if (blobmsg_get_bool(cur))
2652 iflags |= GRE_SEQ;
2653 }
2654
2655 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2656 if (blobmsg_get_bool(cur))
2657 oflags |= GRE_SEQ;
2658 }
2659
2660 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2661 char *str = blobmsg_get_string(cur);
2662
2663 if (strcmp(str, "ignore")) {
2664 char *e;
2665
2666 encap_limit = strtoul(str, &e, 0);
2667
2668 if (e == str || *e || encap_limit > 255) {
2669 ret = -EINVAL;
2670 goto failure;
2671 }
2672
2673 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2674 }
2675 }
2676 }
2677
2678 if (v6) {
2679 struct in6_addr in6buf;
2680 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2681 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2682 ret = -EINVAL;
2683 goto failure;
2684 }
2685 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2686 }
2687
2688 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2689 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2690 ret = -EINVAL;
2691 goto failure;
2692 }
2693 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2694 }
2695
2696 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2697 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2698
2699 if (flowinfo)
2700 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2701
2702 if (flags6)
2703 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2704
2705 if (!ttl)
2706 ttl = 64;
2707 } else {
2708 struct in_addr inbuf;
2709 bool set_df = true;
2710
2711 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2712 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2713 ret = -EINVAL;
2714 goto failure;
2715 }
2716 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2717 }
2718
2719 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2720 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2721 ret = -EINVAL;
2722 goto failure;
2723 }
2724 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2725
2726 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2727 if (!okey) {
2728 okey = inbuf.s_addr;
2729 oflags |= GRE_KEY;
2730 }
2731
2732 if (!ikey) {
2733 ikey = inbuf.s_addr;
2734 iflags |= GRE_KEY;
2735 }
2736 }
2737 }
2738
2739 if ((cur = tb[TUNNEL_ATTR_DF]))
2740 set_df = blobmsg_get_bool(cur);
2741
2742 if (!set_df) {
2743 /* ttl != 0 and nopmtudisc are incompatible */
2744 if (ttl) {
2745 ret = -EINVAL;
2746 goto failure;
2747 }
2748 } else if (!ttl)
2749 ttl = 64;
2750
2751 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2752
2753 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2754 }
2755
2756 if (ttl)
2757 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2758
2759 if (oflags)
2760 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2761
2762 if (iflags)
2763 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2764
2765 if (okey)
2766 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2767
2768 if (ikey)
2769 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2770
2771 nla_nest_end(nlm, infodata);
2772 nla_nest_end(nlm, linkinfo);
2773
2774 return system_rtnl_call(nlm);
2775
2776 failure:
2777 nlmsg_free(nlm);
2778 return ret;
2779 }
2780 #endif
2781
2782 #ifdef IFLA_VTI_MAX
2783 static int system_add_vti_tunnel(const char *name, const char *kind,
2784 const unsigned int link, struct blob_attr **tb, bool v6)
2785 {
2786 struct nl_msg *nlm;
2787 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2788 struct blob_attr *cur;
2789 int ret = 0;
2790
2791 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2792 if (!nlm)
2793 return -1;
2794
2795 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2796 nla_put_string(nlm, IFLA_IFNAME, name);
2797
2798 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2799 if (!linkinfo) {
2800 ret = -ENOMEM;
2801 goto failure;
2802 }
2803
2804 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2805 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2806 if (!infodata) {
2807 ret = -ENOMEM;
2808 goto failure;
2809 }
2810
2811 if (link)
2812 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2813
2814 if (v6) {
2815 struct in6_addr in6buf;
2816 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2817 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2818 ret = -EINVAL;
2819 goto failure;
2820 }
2821 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2822 }
2823
2824 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2825 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2826 ret = -EINVAL;
2827 goto failure;
2828 }
2829 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2830 }
2831
2832 } else {
2833 struct in_addr inbuf;
2834
2835 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2836 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2837 ret = -EINVAL;
2838 goto failure;
2839 }
2840 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2841 }
2842
2843 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2844 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2845 ret = -EINVAL;
2846 goto failure;
2847 }
2848 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2849 }
2850
2851 }
2852
2853 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2854 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2855 uint32_t ikey = 0, okey = 0;
2856
2857 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2858 blobmsg_data(cur), blobmsg_len(cur));
2859
2860 if ((cur = tb_data[VTI_DATA_IKEY])) {
2861 if ((ikey = blobmsg_get_u32(cur)))
2862 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2863 }
2864
2865 if ((cur = tb_data[VTI_DATA_OKEY])) {
2866 if ((okey = blobmsg_get_u32(cur)))
2867 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2868 }
2869 }
2870
2871 nla_nest_end(nlm, infodata);
2872 nla_nest_end(nlm, linkinfo);
2873
2874 return system_rtnl_call(nlm);
2875
2876 failure:
2877 nlmsg_free(nlm);
2878 return ret;
2879 }
2880 #endif
2881
2882 #ifdef IFLA_VXLAN_MAX
2883 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2884 {
2885 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2886 struct nl_msg *msg;
2887 struct nlattr *linkinfo, *data;
2888 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2889 struct blob_attr *cur;
2890 int ret = 0;
2891
2892 if ((cur = tb[TUNNEL_ATTR_DATA]))
2893 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2894 blobmsg_data(cur), blobmsg_len(cur));
2895 else
2896 return -EINVAL;
2897
2898 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2899
2900 if (!msg)
2901 return -1;
2902
2903 nlmsg_append(msg, &iim, sizeof(iim), 0);
2904
2905 nla_put_string(msg, IFLA_IFNAME, name);
2906
2907 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2908 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2909 if (!ea) {
2910 ret = -EINVAL;
2911 goto failure;
2912 }
2913
2914 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2915 }
2916
2917 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2918 uint32_t mtu = blobmsg_get_u32(cur);
2919 nla_put_u32(msg, IFLA_MTU, mtu);
2920 }
2921
2922 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2923 ret = -ENOMEM;
2924 goto failure;
2925 }
2926
2927 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2928
2929 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2930 ret = -ENOMEM;
2931 goto failure;
2932 }
2933
2934 if (link)
2935 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2936
2937 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2938 uint32_t id = blobmsg_get_u32(cur);
2939 if (id >= (1u << 24) - 1) {
2940 ret = -EINVAL;
2941 goto failure;
2942 }
2943
2944 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2945 }
2946
2947 if (v6) {
2948 struct in6_addr in6buf;
2949 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2950 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2951 ret = -EINVAL;
2952 goto failure;
2953 }
2954 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2955 }
2956
2957 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2958 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2959 ret = -EINVAL;
2960 goto failure;
2961 }
2962 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2963 }
2964 } else {
2965 struct in_addr inbuf;
2966
2967 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2968 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2969 ret = -EINVAL;
2970 goto failure;
2971 }
2972 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2973 }
2974
2975 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2976 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2977 ret = -EINVAL;
2978 goto failure;
2979 }
2980 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2981 }
2982 }
2983
2984 uint32_t port = 4789;
2985 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2986 port = blobmsg_get_u32(cur);
2987 if (port < 1 || port > 65535) {
2988 ret = -EINVAL;
2989 goto failure;
2990 }
2991 }
2992 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2993
2994 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2995 bool rxcsum = blobmsg_get_bool(cur);
2996 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2997 }
2998
2999 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
3000 bool txcsum = blobmsg_get_bool(cur);
3001 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
3002 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
3003 }
3004
3005 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3006 char *str = blobmsg_get_string(cur);
3007 unsigned tos = 1;
3008
3009 if (strcmp(str, "inherit")) {
3010 if (!system_tos_aton(str, &tos)) {
3011 ret = -EINVAL;
3012 goto failure;
3013 }
3014 }
3015
3016 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3017 }
3018
3019 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3020 uint32_t ttl = blobmsg_get_u32(cur);
3021 if (ttl < 1 || ttl > 255) {
3022 ret = -EINVAL;
3023 goto failure;
3024 }
3025
3026 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3027 }
3028
3029 nla_nest_end(msg, data);
3030 nla_nest_end(msg, linkinfo);
3031
3032 ret = system_rtnl_call(msg);
3033 if (ret)
3034 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3035
3036 return ret;
3037
3038 failure:
3039 nlmsg_free(msg);
3040 return ret;
3041 }
3042 #endif
3043
3044 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3045 {
3046 struct blob_attr *cur;
3047 int ret = 0;
3048
3049 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3050 return -1;
3051
3052 #ifdef SIOCADD6RD
3053 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3054 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3055 unsigned int mask;
3056 struct ip_tunnel_6rd p6;
3057
3058 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3059 blobmsg_data(cur), blobmsg_len(cur));
3060
3061 memset(&p6, 0, sizeof(p6));
3062
3063 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3064 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3065 &p6.prefix, &mask) || mask > 128) {
3066 ret = -EINVAL;
3067 goto failure;
3068 }
3069
3070 p6.prefixlen = mask;
3071 }
3072
3073 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3074 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3075 &p6.relay_prefix, &mask) || mask > 32) {
3076 ret = -EINVAL;
3077 goto failure;
3078 }
3079
3080 p6.relay_prefixlen = mask;
3081 }
3082
3083 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3084 ret = -1;
3085 goto failure;
3086 }
3087 }
3088 #endif
3089
3090 return ret;
3091
3092 failure:
3093 __system_del_ip_tunnel(name, tb);
3094 return ret;
3095 }
3096
3097 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3098 {
3099 struct blob_attr *cur;
3100 bool set_df = true;
3101 struct ip_tunnel_parm p = {
3102 .link = link,
3103 .iph = {
3104 .version = 4,
3105 .ihl = 5,
3106 .protocol = proto,
3107 }
3108 };
3109
3110 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3111 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3112 return -EINVAL;
3113
3114 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3115 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3116 return -EINVAL;
3117
3118 if ((cur = tb[TUNNEL_ATTR_DF]))
3119 set_df = blobmsg_get_bool(cur);
3120
3121 if ((cur = tb[TUNNEL_ATTR_TTL]))
3122 p.iph.ttl = blobmsg_get_u32(cur);
3123
3124 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3125 char *str = blobmsg_get_string(cur);
3126 if (strcmp(str, "inherit")) {
3127 unsigned uval;
3128
3129 if (!system_tos_aton(str, &uval))
3130 return -EINVAL;
3131
3132 p.iph.tos = uval;
3133 } else
3134 p.iph.tos = 1;
3135 }
3136
3137 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3138 /* ttl !=0 and nopmtudisc are incompatible */
3139 if (p.iph.ttl && p.iph.frag_off == 0)
3140 return -EINVAL;
3141
3142 strncpy(p.name, name, sizeof(p.name) - 1);
3143
3144 switch (p.iph.protocol) {
3145 case IPPROTO_IPIP:
3146 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3147 case IPPROTO_IPV6:
3148 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3149 default:
3150 break;
3151 }
3152 return -1;
3153 }
3154
3155 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3156 {
3157 struct blob_attr *cur;
3158 const char *str;
3159
3160 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3161 return -EINVAL;
3162 str = blobmsg_data(cur);
3163
3164 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3165 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3166 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3167 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
3168 return system_link_del(name);
3169 else
3170 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3171 }
3172
3173 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3174 {
3175 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3176
3177 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3178 blob_data(attr), blob_len(attr));
3179
3180 return __system_del_ip_tunnel(name, tb);
3181 }
3182
3183 int system_update_ipv6_mtu(struct device *dev, int mtu)
3184 {
3185 int ret = -1;
3186 char buf[64];
3187 int fd;
3188
3189 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3190 dev->ifname);
3191
3192 fd = open(buf, O_RDWR);
3193 if (fd < 0)
3194 return ret;
3195
3196 if (!mtu) {
3197 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3198 if (len < 0)
3199 goto out;
3200
3201 buf[len] = 0;
3202 ret = atoi(buf);
3203 } else {
3204 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3205 ret = mtu;
3206 }
3207
3208 out:
3209 close(fd);
3210 return ret;
3211 }
3212
3213 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3214 {
3215 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3216 struct blob_attr *cur;
3217 const char *str;
3218
3219 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3220 blob_data(attr), blob_len(attr));
3221
3222 __system_del_ip_tunnel(name, tb);
3223
3224 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3225 return -EINVAL;
3226 str = blobmsg_data(cur);
3227
3228 unsigned int ttl = 0;
3229 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3230 ttl = blobmsg_get_u32(cur);
3231 if (ttl > 255)
3232 return -EINVAL;
3233 }
3234
3235 unsigned int link = 0;
3236 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3237 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3238 if (!iface)
3239 return -EINVAL;
3240
3241 if (iface->l3_dev.dev)
3242 link = iface->l3_dev.dev->ifindex;
3243 }
3244
3245 if (!strcmp(str, "sit"))
3246 return system_add_sit_tunnel(name, link, tb);
3247 #ifdef IFLA_IPTUN_MAX
3248 else if (!strcmp(str, "ipip6")) {
3249 return system_add_ip6_tunnel(name, link, tb);
3250 } else if (!strcmp(str, "greip")) {
3251 return system_add_gre_tunnel(name, "gre", link, tb, false);
3252 } else if (!strcmp(str, "gretapip")) {
3253 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3254 } else if (!strcmp(str, "greip6")) {
3255 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3256 } else if (!strcmp(str, "gretapip6")) {
3257 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3258 #ifdef IFLA_VTI_MAX
3259 } else if (!strcmp(str, "vtiip")) {
3260 return system_add_vti_tunnel(name, "vti", link, tb, false);
3261 } else if (!strcmp(str, "vtiip6")) {
3262 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3263 #endif
3264 #ifdef IFLA_VXLAN_MAX
3265 } else if(!strcmp(str, "vxlan")) {
3266 return system_add_vxlan(name, link, tb, false);
3267 } else if(!strcmp(str, "vxlan6")) {
3268 return system_add_vxlan(name, link, tb, true);
3269 #endif
3270 #endif
3271 } else if (!strcmp(str, "ipip")) {
3272 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3273 }
3274 else
3275 return -EINVAL;
3276
3277 return 0;
3278 }
OpenWrt Network interface configuration daemon