projects / project / netifd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
netifd: add devtype to ubus call
[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 <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/in.h>
32 #include <netinet/ether.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #ifndef RTN_FAILED_POLICY
52 #define RTN_FAILED_POLICY 12
53 #endif
54
55 #ifndef IFA_F_NOPREFIXROUTE
56 #define IFA_F_NOPREFIXROUTE 0x200
57 #endif
58
59 #ifndef IFA_FLAGS
60 #define IFA_FLAGS (IFA_MULTICAST + 1)
61 #endif
62
63 #include <string.h>
64 #include <fcntl.h>
65 #include <glob.h>
66 #include <time.h>
67 #include <unistd.h>
68
69 #include <netlink/msg.h>
70 #include <netlink/attr.h>
71 #include <netlink/socket.h>
72 #include <libubox/uloop.h>
73
74 #include "netifd.h"
75 #include "device.h"
76 #include "system.h"
77 #include "utils.h"
78
79 struct event_socket {
80 struct uloop_fd uloop;
81 struct nl_sock *sock;
82 int bufsize;
83 };
84
85 static int sock_ioctl = -1;
86 static struct nl_sock *sock_rtnl = NULL;
87
88 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
89 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
90 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
91 const unsigned int link, struct blob_attr **tb);
92
93 static char dev_buf[256];
94 static const char *proc_path = "/proc";
95 static const char *sysfs_path = "/sys";
96
97 static void
98 handler_nl_event(struct uloop_fd *u, unsigned int events)
99 {
100 struct event_socket *ev = container_of(u, struct event_socket, uloop);
101 int err;
102 socklen_t errlen = sizeof(err);
103
104 if (!u->error) {
105 nl_recvmsgs_default(ev->sock);
106 return;
107 }
108
109 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
110 goto abort;
111
112 switch(err) {
113 case ENOBUFS:
114 /* Increase rx buffer size on netlink socket */
115 ev->bufsize *= 2;
116 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
117 goto abort;
118
119 /* Request full dump since some info got dropped */
120 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
121 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
122 break;
123
124 default:
125 goto abort;
126 }
127 u->error = false;
128 return;
129
130 abort:
131 uloop_fd_delete(&ev->uloop);
132 return;
133 }
134
135 static struct nl_sock *
136 create_socket(int protocol, int groups)
137 {
138 struct nl_sock *sock;
139
140 sock = nl_socket_alloc();
141 if (!sock)
142 return NULL;
143
144 if (groups)
145 nl_join_groups(sock, groups);
146
147 if (nl_connect(sock, protocol)) {
148 nl_socket_free(sock);
149 return NULL;
150 }
151
152 return sock;
153 }
154
155 static bool
156 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
157 uloop_fd_handler cb, int flags)
158 {
159 ev->sock = create_socket(protocol, groups);
160 if (!ev->sock)
161 return false;
162
163 ev->uloop.fd = nl_socket_get_fd(ev->sock);
164 ev->uloop.cb = cb;
165 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
166 return false;
167
168 return true;
169 }
170
171 static bool
172 create_event_socket(struct event_socket *ev, int protocol,
173 int (*cb)(struct nl_msg *msg, void *arg))
174 {
175 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
176 return false;
177
178 /* Install the valid custom callback handler */
179 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
180
181 /* Disable sequence number checking on event sockets */
182 nl_socket_disable_seq_check(ev->sock);
183
184 /* Increase rx buffer size to 65K on event sockets */
185 ev->bufsize = 65535;
186 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
187 return false;
188
189 return true;
190 }
191
192 static bool
193 create_hotplug_event_socket(struct event_socket *ev, int protocol,
194 void (*cb)(struct uloop_fd *u, unsigned int events))
195 {
196 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
197 return false;
198
199 /* Increase rx buffer size to 65K on event sockets */
200 ev->bufsize = 65535;
201 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
202 return false;
203
204 return true;
205 }
206
207 static bool
208 system_rtn_aton(const char *src, unsigned int *dst)
209 {
210 char *e;
211 unsigned int n;
212
213 if (!strcmp(src, "local"))
214 n = RTN_LOCAL;
215 else if (!strcmp(src, "nat"))
216 n = RTN_NAT;
217 else if (!strcmp(src, "broadcast"))
218 n = RTN_BROADCAST;
219 else if (!strcmp(src, "anycast"))
220 n = RTN_ANYCAST;
221 else if (!strcmp(src, "multicast"))
222 n = RTN_MULTICAST;
223 else if (!strcmp(src, "prohibit"))
224 n = RTN_PROHIBIT;
225 else if (!strcmp(src, "unreachable"))
226 n = RTN_UNREACHABLE;
227 else if (!strcmp(src, "blackhole"))
228 n = RTN_BLACKHOLE;
229 else if (!strcmp(src, "xresolve"))
230 n = RTN_XRESOLVE;
231 else if (!strcmp(src, "unicast"))
232 n = RTN_UNICAST;
233 else if (!strcmp(src, "throw"))
234 n = RTN_THROW;
235 else if (!strcmp(src, "failed_policy"))
236 n = RTN_FAILED_POLICY;
237 else {
238 n = strtoul(src, &e, 0);
239 if (!e || *e || e == src || n > 255)
240 return false;
241 }
242
243 *dst = n;
244 return true;
245 }
246
247 static bool
248 system_tos_aton(const char *src, unsigned *dst)
249 {
250 char *e;
251
252 *dst = strtoul(src, &e, 16);
253 if (e == src || *e || *dst > 255)
254 return false;
255
256 return true;
257 }
258
259 int system_init(void)
260 {
261 static struct event_socket rtnl_event;
262 static struct event_socket hotplug_event;
263
264 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
265 system_fd_set_cloexec(sock_ioctl);
266
267 /* Prepare socket for routing / address control */
268 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
269 if (!sock_rtnl)
270 return -1;
271
272 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
273 return -1;
274
275 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
276 handle_hotplug_event))
277 return -1;
278
279 /* Receive network link events form kernel */
280 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
281
282 return 0;
283 }
284
285 static void write_file(const char *path, const char *val)
286 {
287 int fd;
288
289 fd = open(path, O_WRONLY);
290 if (fd < 0)
291 return;
292
293 if (write(fd, val, strlen(val))) {}
294 close(fd);
295 }
296
297 static int read_file(const char *path, char *buf, const size_t buf_sz)
298 {
299 int fd = -1, ret = -1;
300
301 fd = open(path, O_RDONLY);
302 if (fd < 0)
303 goto out;
304
305 ssize_t len = read(fd, buf, buf_sz - 1);
306 if (len < 0)
307 goto out;
308
309 ret = buf[len] = 0;
310
311 out:
312 if (fd >= 0)
313 close(fd);
314
315 return ret;
316 }
317
318
319 static const char *
320 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
321 {
322 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
323
324 return dev_buf;
325 }
326
327 static const char *
328 dev_sysfs_path(const char *ifname, const char *file)
329 {
330 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
331
332 return dev_buf;
333 }
334
335 static void
336 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
337 const char *val)
338 {
339 write_file(dev_sysctl_path(prefix, ifname, file), val);
340 }
341
342 static int
343 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
344 char *buf, size_t buf_sz)
345 {
346 return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
347 }
348
349 static void
350 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
351 {
352 if (!val)
353 return;
354
355 write_file(dev_sysfs_path(ifname, file), val);
356 }
357
358 static void
359 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
360 {
361 char buf[16];
362
363 snprintf(buf, sizeof(buf), "%d", val);
364 system_set_dev_sysfs(file, ifname, buf);
365 }
366
367 static int
368 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
369 {
370 return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
371 }
372
373 static void system_set_disable_ipv6(struct device *dev, const char *val)
374 {
375 system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
376 }
377
378 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
379 {
380 system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
381 }
382
383 static void system_set_rpfilter(struct device *dev, const char *val)
384 {
385 system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
386 }
387
388 static void system_set_acceptlocal(struct device *dev, const char *val)
389 {
390 system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
391 }
392
393 static void system_set_igmpversion(struct device *dev, const char *val)
394 {
395 system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
396 }
397
398 static void system_set_mldversion(struct device *dev, const char *val)
399 {
400 system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
401 }
402
403 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
404 {
405 system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
406 }
407
408 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
409 {
410 system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
411 }
412
413 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
414 {
415 system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
416 }
417
418 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
419 {
420 system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
421 }
422
423 static void system_set_neigh4locktime(struct device *dev, const char *val)
424 {
425 system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
426 }
427
428 static void system_set_dadtransmits(struct device *dev, const char *val)
429 {
430 system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
431 }
432
433 static void system_set_sendredirects(struct device *dev, const char *val)
434 {
435 system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
436 }
437
438 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
439 {
440 system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
441 }
442
443 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
444 {
445 system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
446 }
447
448 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
449 {
450 system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
451 }
452
453 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
454 {
455 system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
456 }
457
458 static void system_set_arp_accept(struct device *dev, const char *val)
459 {
460 system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
461 }
462
463 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
464 {
465 system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
466 }
467
468 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
469 {
470 system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
471 }
472
473 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
474 {
475 system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
476 }
477
478 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
479 {
480 system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
481 }
482
483 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
484 {
485 system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
486 }
487
488 static void system_bridge_set_isolated(struct device *dev, const char *val)
489 {
490 system_set_dev_sysfs("brport/isolated", dev->ifname, val);
491 }
492
493 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
494 {
495 system_set_dev_sysfs(bridge ? "bridge/multicast_router" :
496 "brport/multicast_router",
497 dev->ifname, val);
498 }
499
500 static void system_bridge_set_robustness(struct device *dev, const char *val)
501 {
502 system_set_dev_sysfs("bridge/multicast_startup_query_count",
503 dev->ifname, val);
504 system_set_dev_sysfs("bridge/multicast_last_member_count",
505 dev->ifname, val);
506 }
507
508 static void system_bridge_set_query_interval(struct device *dev, const char *val)
509 {
510 system_set_dev_sysfs("bridge/multicast_query_interval",
511 dev->ifname, val);
512 }
513
514 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
515 {
516 system_set_dev_sysfs("bridge/multicast_query_response_interval",
517 dev->ifname, val);
518 }
519
520 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
521 {
522 system_set_dev_sysfs("bridge/multicast_last_member_interval",
523 dev->ifname, val);
524 }
525
526 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
527 {
528 system_set_dev_sysfs("bridge/multicast_membership_interval",
529 dev->ifname, val);
530 }
531
532 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
533 {
534 system_set_dev_sysfs("bridge/multicast_querier_interval",
535 dev->ifname, val);
536 }
537
538 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
539 {
540 system_set_dev_sysfs("bridge/multicast_startup_query_interval",
541 dev->ifname, val);
542 }
543
544 void system_bridge_set_stp_state(struct device *dev, bool val)
545 {
546 const char *valstr = val ? "1" : "0";
547
548 system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
549 }
550
551 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
552 {
553 system_set_dev_sysfs("bridge/forward_delay", dev->ifname, val);
554 }
555
556 static void system_bridge_set_priority(struct device *dev, const char *val)
557 {
558 system_set_dev_sysfs("bridge/priority", dev->ifname, val);
559 }
560
561 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
562 {
563 system_set_dev_sysfs("bridge/ageing_time", dev->ifname, val);
564 }
565
566 static void system_bridge_set_hello_time(struct device *dev, const char *val)
567 {
568 system_set_dev_sysfs("bridge/hello_time", dev->ifname, val);
569 }
570
571 static void system_bridge_set_max_age(struct device *dev, const char *val)
572 {
573 system_set_dev_sysfs("bridge/max_age", dev->ifname, val);
574 }
575
576 static void system_bridge_set_learning(struct device *dev, const char *val)
577 {
578 system_set_dev_sysfs("brport/learning", dev->ifname, val);
579 }
580
581 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
582 {
583 system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
584 }
585
586 static void system_bridge_set_vlan_filtering(struct device *dev, const char *val)
587 {
588 system_set_dev_sysfs("bridge/vlan_filtering", dev->ifname, val);
589 }
590
591 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
592 {
593 return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
594 dev->ifname, buf, buf_sz);
595 }
596
597 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
598 {
599 return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
600 dev->ifname, buf, buf_sz);
601 }
602
603 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
604 {
605 return system_get_dev_sysctl("ipv4/conf", "rp_filter",
606 dev->ifname, buf, buf_sz);
607 }
608
609 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
610 {
611 return system_get_dev_sysctl("ipv4/conf", "accept_local",
612 dev->ifname, buf, buf_sz);
613 }
614
615 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
616 {
617 return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
618 dev->ifname, buf, buf_sz);
619 }
620
621 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
622 {
623 return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
624 dev->ifname, buf, buf_sz);
625 }
626
627 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
628 {
629 return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
630 dev->ifname, buf, buf_sz);
631 }
632
633 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
634 {
635 return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
636 dev->ifname, buf, buf_sz);
637 }
638
639 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
640 {
641 return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
642 dev->ifname, buf, buf_sz);
643 }
644
645 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
646 {
647 return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
648 dev->ifname, buf, buf_sz);
649 }
650
651 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
652 {
653 return system_get_dev_sysctl("ipv4/neigh", "locktime",
654 dev->ifname, buf, buf_sz);
655 }
656
657 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
658 {
659 return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
660 dev->ifname, buf, buf_sz);
661 }
662
663 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
664 {
665 return system_get_dev_sysctl("ipv4/conf", "send_redirects",
666 dev->ifname, buf, buf_sz);
667 }
668
669
670 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
671 {
672 return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
673 dev->ifname, buf, buf_sz);
674 }
675
676 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
677 {
678 return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
679 dev->ifname, buf, buf_sz);
680 }
681
682 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
683 {
684 return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
685 dev->ifname, buf, buf_sz);
686 }
687
688 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
689 {
690 return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
691 dev->ifname, buf, buf_sz);
692 }
693
694 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
695 {
696 return system_get_dev_sysctl("ipv4/conf", "arp_accept",
697 dev->ifname, buf, buf_sz);
698 }
699
700 /* Evaluate netlink messages */
701 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
702 {
703 struct nlmsghdr *nh = nlmsg_hdr(msg);
704 struct nlattr *nla[__IFLA_MAX];
705 int link_state = 0;
706 char buf[10];
707
708 if (nh->nlmsg_type != RTM_NEWLINK)
709 goto out;
710
711 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
712 if (!nla[IFLA_IFNAME])
713 goto out;
714
715 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
716 if (!dev)
717 goto out;
718
719 if (!system_get_dev_sysfs("carrier", dev->ifname, buf, sizeof(buf)))
720 link_state = strtoul(buf, NULL, 0);
721
722 if (dev->type == &simple_device_type)
723 device_set_present(dev, true);
724
725 device_set_link(dev, link_state ? true : false);
726
727 out:
728 return 0;
729 }
730
731 static void
732 handle_hotplug_msg(char *data, int size)
733 {
734 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
735 char *cur, *end, *sep;
736 int skip;
737 bool add;
738
739 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
740 add = true;
741 else if (!strncmp(data, "remove@", 7))
742 add = false;
743 else
744 return;
745
746 skip = strlen(data) + 1;
747 end = data + size;
748
749 for (cur = data + skip; cur < end; cur += skip) {
750 skip = strlen(cur) + 1;
751
752 sep = strchr(cur, '=');
753 if (!sep)
754 continue;
755
756 *sep = 0;
757 if (!strcmp(cur, "INTERFACE"))
758 interface = sep + 1;
759 else if (!strcmp(cur, "SUBSYSTEM")) {
760 subsystem = sep + 1;
761 if (strcmp(subsystem, "net") != 0)
762 return;
763 } else if (!strcmp(cur, "DEVPATH_OLD")) {
764 interface_old = strrchr(sep + 1, '/');
765 if (interface_old)
766 interface_old++;
767 }
768 }
769
770 if (!subsystem || !interface)
771 return;
772
773 if (interface_old)
774 device_hotplug_event(interface_old, false);
775
776 device_hotplug_event(interface, add);
777 }
778
779 static void
780 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
781 {
782 struct event_socket *ev = container_of(u, struct event_socket, uloop);
783 struct sockaddr_nl nla;
784 unsigned char *buf = NULL;
785 int size;
786 int err;
787 socklen_t errlen = sizeof(err);
788
789 if (!u->error) {
790 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
791 if (nla.nl_pid == 0)
792 handle_hotplug_msg((char *) buf, size);
793
794 free(buf);
795 }
796 return;
797 }
798
799 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
800 goto abort;
801
802 switch(err) {
803 case ENOBUFS:
804 /* Increase rx buffer size on netlink socket */
805 ev->bufsize *= 2;
806 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
807 goto abort;
808 break;
809
810 default:
811 goto abort;
812 }
813 u->error = false;
814 return;
815
816 abort:
817 uloop_fd_delete(&ev->uloop);
818 return;
819 }
820
821 static int system_rtnl_call(struct nl_msg *msg)
822 {
823 int ret;
824
825 ret = nl_send_auto_complete(sock_rtnl, msg);
826 nlmsg_free(msg);
827
828 if (ret < 0)
829 return ret;
830
831 return nl_wait_for_ack(sock_rtnl);
832 }
833
834 int system_bridge_delbr(struct device *bridge)
835 {
836 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
837 }
838
839 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
840 {
841 struct ifreq ifr;
842
843 memset(&ifr, 0, sizeof(ifr));
844 if (dev)
845 ifr.ifr_ifindex = dev->ifindex;
846 else
847 ifr.ifr_data = data;
848 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
849 return ioctl(sock_ioctl, cmd, &ifr);
850 }
851
852 static bool system_is_bridge(const char *name)
853 {
854 struct stat st;
855
856 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
857 }
858
859 static char *system_get_bridge(const char *name, char *buf, int buflen)
860 {
861 char *path;
862 ssize_t len = -1;
863 glob_t gl;
864
865 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
866 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
867 return NULL;
868
869 if (gl.gl_pathc > 0)
870 len = readlink(gl.gl_pathv[0], buf, buflen);
871
872 globfree(&gl);
873
874 if (len < 0)
875 return NULL;
876
877 buf[len] = 0;
878 path = strrchr(buf, '/');
879 if (!path)
880 return NULL;
881
882 return path + 1;
883 }
884
885 static void
886 system_bridge_set_wireless(struct device *bridge, struct device *dev)
887 {
888 bool mcast_to_ucast = dev->wireless_ap;
889 bool hairpin;
890
891 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
892 !bridge->settings.multicast_to_unicast)
893 mcast_to_ucast = false;
894
895 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
896 if (dev->wireless_isolate)
897 hairpin = false;
898
899 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
900 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
901 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
902 }
903
904 int system_bridge_addif(struct device *bridge, struct device *dev)
905 {
906 char buf[64];
907 char *oldbr;
908 int tries = 0;
909 int ret;
910
911 retry:
912 ret = 0;
913 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
914 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
915 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
916 tries++;
917 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
918 dev->ifname, bridge->ifname, tries, strerror(errno));
919 if (tries <= 3)
920 goto retry;
921 }
922
923 if (dev->wireless)
924 system_bridge_set_wireless(bridge, dev);
925
926 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
927 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
928 system_bridge_set_multicast_router(dev, buf, false);
929 }
930
931 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
932 dev->settings.multicast_fast_leave)
933 system_bridge_set_multicast_fast_leave(dev, "1");
934
935 if (dev->settings.flags & DEV_OPT_LEARNING &&
936 !dev->settings.learning)
937 system_bridge_set_learning(dev, "0");
938
939 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
940 !dev->settings.unicast_flood)
941 system_bridge_set_unicast_flood(dev, "0");
942
943 if (dev->settings.flags & DEV_OPT_ISOLATE &&
944 dev->settings.isolate)
945 system_bridge_set_isolated(dev, "1");
946
947 if (dev->bpdu_filter)
948 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
949
950 return ret;
951 }
952
953 int system_bridge_delif(struct device *bridge, struct device *dev)
954 {
955 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
956 }
957
958 int system_bridge_vlan(const char *iface, uint16_t vid, bool add, unsigned int vflags)
959 {
960 struct ifinfomsg ifi = { .ifi_family = PF_BRIDGE, };
961 struct bridge_vlan_info vinfo = { .vid = vid, };
962 unsigned short flags = 0;
963 struct nlattr *afspec;
964 struct nl_msg *nlm;
965 int ret = 0;
966
967 ifi.ifi_index = if_nametoindex(iface);
968 if (!ifi.ifi_index)
969 return -1;
970
971 nlm = nlmsg_alloc_simple(add ? RTM_SETLINK : RTM_DELLINK, NLM_F_REQUEST);
972 if (!nlm)
973 return -1;
974
975 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
976
977 if (vflags & BRVLAN_F_SELF)
978 flags |= BRIDGE_FLAGS_SELF;
979
980 if (vflags & BRVLAN_F_PVID)
981 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
982
983 if (vflags & BRVLAN_F_UNTAGGED)
984 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
985
986 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
987 if (!afspec) {
988 ret = -ENOMEM;
989 goto failure;
990 }
991
992 if (flags)
993 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
994
995 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
996 nla_nest_end(nlm, afspec);
997
998 return system_rtnl_call(nlm);
999
1000 failure:
1001 nlmsg_free(nlm);
1002 return ret;
1003 }
1004
1005 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1006 {
1007 const char *ifname = dev->ifname;
1008 struct blob_attr *cur;
1009 char op = cfg ? '+' : '-';
1010 char buf[64];
1011 int rem;
1012
1013 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1014 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1015 write_file(dev_buf, buf);
1016
1017 if (!cfg)
1018 return 0;
1019
1020 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1021
1022 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1023
1024 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1025 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1026 cfg->policy == BONDING_MODE_8023AD)
1027 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1028
1029 if (cfg->policy == BONDING_MODE_8023AD) {
1030 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1031 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1032 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1033 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1034 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1035 }
1036
1037 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1038 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1039
1040 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1041 cfg->policy == BONDING_MODE_BALANCE_ALB)
1042 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1043
1044 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1045 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1046 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1047 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1048 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1049 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1050
1051 system_set_dev_sysfs_int((cfg->monitor_arp ?
1052 "bonding/arp_interval" :
1053 "bonding/miimon"), ifname, cfg->monitor_interval);
1054
1055 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1056 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1057 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1058 }
1059
1060 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1061 if (cfg->policy < BONDING_MODE_8023AD)
1062 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1063 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1064 if (!cfg->monitor_arp && cfg->monitor_interval) {
1065 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1066 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1067 }
1068
1069 return 0;
1070 }
1071
1072 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1073 {
1074 const char *port_name = port->ifname;
1075 const char op_ch = add ? '+' : '-';
1076 char buf[IFNAMSIZ + 2];
1077
1078 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1079 system_if_down(port);
1080 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1081 system_if_up(port);
1082
1083 if (primary)
1084 system_set_dev_sysfs("bonding/primary", dev->ifname,
1085 add ? port_name : "");
1086
1087 return 0;
1088 }
1089
1090 int system_if_resolve(struct device *dev)
1091 {
1092 struct ifreq ifr;
1093
1094 memset(&ifr, 0, sizeof(ifr));
1095 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1096 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1097 return ifr.ifr_ifindex;
1098 else
1099 return 0;
1100 }
1101
1102 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1103 {
1104 struct ifreq ifr;
1105
1106 memset(&ifr, 0, sizeof(ifr));
1107 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1108 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1109 return -1;
1110
1111 ifr.ifr_flags |= add;
1112 ifr.ifr_flags &= ~rem;
1113 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1114 }
1115
1116 struct clear_data {
1117 struct nl_msg *msg;
1118 struct device *dev;
1119 int type;
1120 int size;
1121 int af;
1122 };
1123
1124
1125 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1126 {
1127 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1128
1129 return ifa->ifa_index == ifindex;
1130 }
1131
1132 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1133 {
1134 struct rtmsg *r = NLMSG_DATA(hdr);
1135 struct nlattr *tb[__RTA_MAX];
1136
1137 if (r->rtm_protocol == RTPROT_KERNEL &&
1138 r->rtm_family == AF_INET6)
1139 return false;
1140
1141 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1142 if (!tb[RTA_OIF])
1143 return false;
1144
1145 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1146 }
1147
1148 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1149 {
1150 return true;
1151 }
1152
1153 static int cb_clear_event(struct nl_msg *msg, void *arg)
1154 {
1155 struct clear_data *clr = arg;
1156 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1157 bool (*cb)(struct nlmsghdr *, int ifindex);
1158 int type, ret;
1159
1160 switch(clr->type) {
1161 case RTM_GETADDR:
1162 type = RTM_DELADDR;
1163 if (hdr->nlmsg_type != RTM_NEWADDR)
1164 return NL_SKIP;
1165
1166 cb = check_ifaddr;
1167 break;
1168 case RTM_GETROUTE:
1169 type = RTM_DELROUTE;
1170 if (hdr->nlmsg_type != RTM_NEWROUTE)
1171 return NL_SKIP;
1172
1173 cb = check_route;
1174 break;
1175 case RTM_GETRULE:
1176 type = RTM_DELRULE;
1177 if (hdr->nlmsg_type != RTM_NEWRULE)
1178 return NL_SKIP;
1179
1180 cb = check_rule;
1181 break;
1182 default:
1183 return NL_SKIP;
1184 }
1185
1186 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1187 return NL_SKIP;
1188
1189 if (type == RTM_DELRULE)
1190 D(SYSTEM, "Remove a rule\n");
1191 else
1192 D(SYSTEM, "Remove %s from device %s\n",
1193 type == RTM_DELADDR ? "an address" : "a route",
1194 clr->dev->ifname);
1195
1196 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1197 hdr = nlmsg_hdr(clr->msg);
1198 hdr->nlmsg_type = type;
1199 hdr->nlmsg_flags = NLM_F_REQUEST;
1200
1201 nl_socket_disable_auto_ack(sock_rtnl);
1202 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1203 if (ret < 0) {
1204 if (type == RTM_DELRULE)
1205 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1206 else
1207 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1208 type == RTM_DELADDR ? "an address" : "a route",
1209 clr->dev->ifname, ret);
1210 }
1211
1212 nl_socket_enable_auto_ack(sock_rtnl);
1213
1214 return NL_SKIP;
1215 }
1216
1217 static int
1218 cb_finish_event(struct nl_msg *msg, void *arg)
1219 {
1220 int *pending = arg;
1221 *pending = 0;
1222 return NL_STOP;
1223 }
1224
1225 static int
1226 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1227 {
1228 int *pending = arg;
1229 *pending = err->error;
1230 return NL_STOP;
1231 }
1232
1233 static void
1234 system_if_clear_entries(struct device *dev, int type, int af)
1235 {
1236 struct clear_data clr;
1237 struct nl_cb *cb;
1238 struct rtmsg rtm = {
1239 .rtm_family = af,
1240 .rtm_flags = RTM_F_CLONED,
1241 };
1242 int flags = NLM_F_DUMP;
1243 int pending = 1;
1244
1245 clr.af = af;
1246 clr.dev = dev;
1247 clr.type = type;
1248 switch (type) {
1249 case RTM_GETADDR:
1250 case RTM_GETRULE:
1251 clr.size = sizeof(struct rtgenmsg);
1252 break;
1253 case RTM_GETROUTE:
1254 clr.size = sizeof(struct rtmsg);
1255 break;
1256 default:
1257 return;
1258 }
1259
1260 cb = nl_cb_alloc(NL_CB_DEFAULT);
1261 if (!cb)
1262 return;
1263
1264 clr.msg = nlmsg_alloc_simple(type, flags);
1265 if (!clr.msg)
1266 goto out;
1267
1268 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1269 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1270 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1271 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1272
1273 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1274 goto free;
1275
1276 while (pending > 0)
1277 nl_recvmsgs(sock_rtnl, cb);
1278
1279 free:
1280 nlmsg_free(clr.msg);
1281 out:
1282 nl_cb_put(cb);
1283 }
1284
1285 /*
1286 * Clear bridge (membership) state and bring down device
1287 */
1288 void system_if_clear_state(struct device *dev)
1289 {
1290 static char buf[256];
1291 char *bridge;
1292 device_set_ifindex(dev, system_if_resolve(dev));
1293
1294 if (dev->external || !dev->ifindex)
1295 return;
1296
1297 system_if_flags(dev->ifname, 0, IFF_UP);
1298
1299 if (system_is_bridge(dev->ifname)) {
1300 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1301 system_bridge_delbr(dev);
1302 return;
1303 }
1304
1305 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1306 if (bridge) {
1307 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1308 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1309 }
1310
1311 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1312 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1313 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1314 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1315 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1316 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1317 system_set_disable_ipv6(dev, "0");
1318 }
1319
1320 static inline unsigned long
1321 sec_to_jiffies(int val)
1322 {
1323 return (unsigned long) val * 100;
1324 }
1325
1326 static void system_bridge_conf_multicast_deps(struct device *bridge,
1327 struct bridge_config *cfg,
1328 char *buf,
1329 int buf_len)
1330 {
1331 int val;
1332
1333 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1334 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1335 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1336 val = cfg->robustness * cfg->query_interval +
1337 cfg->query_response_interval;
1338
1339 snprintf(buf, buf_len, "%i", val);
1340 system_bridge_set_membership_interval(bridge, buf);
1341
1342 val = cfg->robustness * cfg->query_interval +
1343 cfg->query_response_interval / 2;
1344
1345 snprintf(buf, buf_len, "%i", val);
1346 system_bridge_set_other_querier_timeout(bridge, buf);
1347 }
1348
1349 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1350 val = cfg->query_interval / 4;
1351
1352 snprintf(buf, buf_len, "%i", val);
1353 system_bridge_set_startup_query_interval(bridge, buf);
1354 }
1355 }
1356
1357 static void system_bridge_conf_multicast(struct device *bridge,
1358 struct bridge_config *cfg,
1359 char *buf,
1360 int buf_len)
1361 {
1362 system_set_dev_sysfs("bridge/multicast_snooping",
1363 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1364
1365 system_set_dev_sysfs("bridge/multicast_querier",
1366 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1367
1368 snprintf(buf, buf_len, "%i", cfg->hash_max);
1369 system_set_dev_sysfs("/bridge/hash_max",
1370 bridge->ifname, buf);
1371
1372 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1373 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1374 system_bridge_set_multicast_router(bridge, buf, true);
1375 }
1376
1377 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1378 snprintf(buf, buf_len, "%i", cfg->robustness);
1379 system_bridge_set_robustness(bridge, buf);
1380 }
1381
1382 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1383 snprintf(buf, buf_len, "%i", cfg->query_interval);
1384 system_bridge_set_query_interval(bridge, buf);
1385 }
1386
1387 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1388 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1389 system_bridge_set_query_response_interval(bridge, buf);
1390 }
1391
1392 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1393 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1394 system_bridge_set_last_member_interval(bridge, buf);
1395 }
1396
1397 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1398 }
1399
1400 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1401 {
1402 char buf[64];
1403
1404 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1405 return -1;
1406
1407 system_bridge_set_stp_state(bridge, cfg->stp);
1408
1409 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1410 system_bridge_set_forward_delay(bridge, buf);
1411
1412 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1413 system_bridge_set_vlan_filtering(bridge, cfg->vlan_filtering ? "1" : "0");
1414
1415 snprintf(buf, sizeof(buf), "%d", cfg->priority);
1416 system_bridge_set_priority(bridge, buf);
1417
1418 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1419 system_bridge_set_hello_time(bridge, buf);
1420
1421 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1422 system_bridge_set_max_age(bridge, buf);
1423
1424 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1425 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1426 system_bridge_set_ageing_time(bridge, buf);
1427 }
1428
1429 return 0;
1430 }
1431
1432 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1433 {
1434 struct nl_msg *msg;
1435 struct nlattr *linkinfo, *data;
1436 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1437 int i, rv;
1438 static const struct {
1439 const char *name;
1440 enum macvlan_mode val;
1441 } modes[] = {
1442 { "private", MACVLAN_MODE_PRIVATE },
1443 { "vepa", MACVLAN_MODE_VEPA },
1444 { "bridge", MACVLAN_MODE_BRIDGE },
1445 { "passthru", MACVLAN_MODE_PASSTHRU },
1446 };
1447
1448 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1449
1450 if (!msg)
1451 return -1;
1452
1453 nlmsg_append(msg, &iim, sizeof(iim), 0);
1454
1455 if (cfg->flags & MACVLAN_OPT_MACADDR)
1456 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1457 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1458 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1459
1460 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1461 goto nla_put_failure;
1462
1463 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1464
1465 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1466 goto nla_put_failure;
1467
1468 if (cfg->mode) {
1469 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1470 if (strcmp(cfg->mode, modes[i].name) != 0)
1471 continue;
1472
1473 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1474 break;
1475 }
1476 }
1477
1478 nla_nest_end(msg, data);
1479 nla_nest_end(msg, linkinfo);
1480
1481 rv = system_rtnl_call(msg);
1482 if (rv)
1483 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1484
1485 return rv;
1486
1487 nla_put_failure:
1488 nlmsg_free(msg);
1489 return -ENOMEM;
1490 }
1491
1492 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1493 {
1494 struct nl_msg *msg;
1495 struct ifinfomsg iim = {
1496 .ifi_family = AF_UNSPEC,
1497 };
1498
1499 if (!dev)
1500 return -1;
1501
1502 iim.ifi_index = system_if_resolve(dev);
1503 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1504
1505 if (!msg)
1506 return -1;
1507
1508 nlmsg_append(msg, &iim, sizeof(iim), 0);
1509 if (target_ifname)
1510 nla_put_string(msg, IFLA_IFNAME, target_ifname);
1511
1512 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1513 return system_rtnl_call(msg);
1514 }
1515
1516 static int system_link_del(const char *ifname)
1517 {
1518 struct nl_msg *msg;
1519 struct ifinfomsg iim = {
1520 .ifi_family = AF_UNSPEC,
1521 .ifi_index = 0,
1522 };
1523
1524 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1525
1526 if (!msg)
1527 return -1;
1528
1529 nlmsg_append(msg, &iim, sizeof(iim), 0);
1530 nla_put_string(msg, IFLA_IFNAME, ifname);
1531 return system_rtnl_call(msg);
1532 }
1533
1534 int system_macvlan_del(struct device *macvlan)
1535 {
1536 return system_link_del(macvlan->ifname);
1537 }
1538
1539 int system_netns_open(const pid_t target_ns)
1540 {
1541 char pid_net_path[PATH_MAX];
1542
1543 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1544
1545 return open(pid_net_path, O_RDONLY);
1546 }
1547
1548 int system_netns_set(int netns_fd)
1549 {
1550 return setns(netns_fd, CLONE_NEWNET);
1551 }
1552
1553 int system_veth_add(struct device *veth, struct veth_config *cfg)
1554 {
1555 struct nl_msg *msg;
1556 struct ifinfomsg empty_iim = {};
1557 struct nlattr *linkinfo, *data, *veth_info;
1558 int rv;
1559
1560 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1561
1562 if (!msg)
1563 return -1;
1564
1565 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1566
1567 if (cfg->flags & VETH_OPT_MACADDR)
1568 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1569 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1570
1571 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1572 goto nla_put_failure;
1573
1574 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1575
1576 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1577 goto nla_put_failure;
1578
1579 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1580 goto nla_put_failure;
1581
1582 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1583
1584 if (cfg->flags & VETH_OPT_PEER_NAME)
1585 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1586 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1587 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1588
1589 nla_nest_end(msg, veth_info);
1590 nla_nest_end(msg, data);
1591 nla_nest_end(msg, linkinfo);
1592
1593 rv = system_rtnl_call(msg);
1594 if (rv) {
1595 if (cfg->flags & VETH_OPT_PEER_NAME)
1596 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1597 else
1598 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1599 }
1600
1601 return rv;
1602
1603 nla_put_failure:
1604 nlmsg_free(msg);
1605 return -ENOMEM;
1606 }
1607
1608 int system_veth_del(struct device *veth)
1609 {
1610 return system_link_del(veth->ifname);
1611 }
1612
1613 static int system_vlan(struct device *dev, int id)
1614 {
1615 struct vlan_ioctl_args ifr = {
1616 .cmd = SET_VLAN_NAME_TYPE_CMD,
1617 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1618 };
1619
1620 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1621 return -1;
1622
1623 if (id < 0) {
1624 ifr.cmd = DEL_VLAN_CMD;
1625 ifr.u.VID = 0;
1626 } else {
1627 ifr.cmd = ADD_VLAN_CMD;
1628 ifr.u.VID = id;
1629 }
1630 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1631 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1632 }
1633
1634 int system_vlan_add(struct device *dev, int id)
1635 {
1636 return system_vlan(dev, id);
1637 }
1638
1639 int system_vlan_del(struct device *dev)
1640 {
1641 return system_vlan(dev, -1);
1642 }
1643
1644 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1645 {
1646 struct nl_msg *msg;
1647 struct nlattr *linkinfo, *data, *qos;
1648 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1649 struct vlan_qos_mapping *elem;
1650 struct ifla_vlan_qos_mapping nl_qos_map;
1651 int rv;
1652
1653 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1654
1655 if (!msg)
1656 return -1;
1657
1658 nlmsg_append(msg, &iim, sizeof(iim), 0);
1659 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1660 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1661
1662 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1663 goto nla_put_failure;
1664
1665 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1666
1667 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1668 goto nla_put_failure;
1669
1670 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1671
1672 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1673 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1674 #else
1675 if(cfg->proto == VLAN_PROTO_8021AD)
1676 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);
1677 #endif
1678
1679 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1680 goto nla_put_failure;
1681
1682 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1683 nl_qos_map.from = elem->from;
1684 nl_qos_map.to = elem->to;
1685 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1686 }
1687 nla_nest_end(msg, qos);
1688
1689 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1690 goto nla_put_failure;
1691
1692 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1693 nl_qos_map.from = elem->from;
1694 nl_qos_map.to = elem->to;
1695 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1696 }
1697 nla_nest_end(msg, qos);
1698
1699 nla_nest_end(msg, data);
1700 nla_nest_end(msg, linkinfo);
1701
1702 rv = system_rtnl_call(msg);
1703 if (rv)
1704 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1705
1706 return rv;
1707
1708 nla_put_failure:
1709 nlmsg_free(msg);
1710 return -ENOMEM;
1711 }
1712
1713 int system_vlandev_del(struct device *vlandev)
1714 {
1715 return system_link_del(vlandev->ifname);
1716 }
1717
1718 static void
1719 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1720 {
1721 struct ethtool_cmd ecmd = {
1722 .cmd = ETHTOOL_GSET,
1723 };
1724 struct ifreq ifr = {
1725 .ifr_data = (caddr_t)&ecmd,
1726 };
1727 static const struct {
1728 int speed;
1729 uint8_t bit_half;
1730 uint8_t bit_full;
1731 } speed_mask[] = {
1732 { 10, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT },
1733 { 100, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT },
1734 { 1000, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT },
1735 };
1736 uint32_t adv;
1737 int i;
1738
1739 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1740
1741 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
1742 return;
1743
1744 adv = ecmd.supported;
1745 for (i = 0; i < ARRAY_SIZE(speed_mask); i++) {
1746 if (s->flags & DEV_OPT_DUPLEX) {
1747 int bit = s->duplex ? speed_mask[i].bit_half : speed_mask[i].bit_full;
1748 adv &= ~(1 << bit);
1749 }
1750
1751 if (!(s->flags & DEV_OPT_SPEED) ||
1752 s->speed == speed_mask[i].speed)
1753 continue;
1754
1755 adv &= ~(1 << speed_mask[i].bit_full);
1756 adv &= ~(1 << speed_mask[i].bit_half);
1757 }
1758
1759
1760 if (ecmd.autoneg && ecmd.advertising == adv)
1761 return;
1762
1763 ecmd.autoneg = 1;
1764 ecmd.advertising = adv;
1765 ecmd.cmd = ETHTOOL_SSET;
1766 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1767 }
1768
1769 void
1770 system_if_get_settings(struct device *dev, struct device_settings *s)
1771 {
1772 struct ifreq ifr;
1773 char buf[10];
1774
1775 memset(&ifr, 0, sizeof(ifr));
1776 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1777
1778 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1779 s->mtu = ifr.ifr_mtu;
1780 s->flags |= DEV_OPT_MTU;
1781 }
1782
1783 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1784 if (s->mtu6 > 0)
1785 s->flags |= DEV_OPT_MTU6;
1786
1787 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1788 s->txqueuelen = ifr.ifr_qlen;
1789 s->flags |= DEV_OPT_TXQUEUELEN;
1790 }
1791
1792 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1793 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1794 s->flags |= DEV_OPT_MACADDR;
1795 }
1796
1797 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1798 s->ipv6 = !strtoul(buf, NULL, 0);
1799 s->flags |= DEV_OPT_IPV6;
1800 }
1801
1802 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1803 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1804 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1805 }
1806
1807 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1808 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1809 s->flags |= DEV_OPT_PROMISC;
1810
1811 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1812 s->flags |= DEV_OPT_MULTICAST;
1813 }
1814
1815 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1816 s->rpfilter = strtoul(buf, NULL, 0);
1817 s->flags |= DEV_OPT_RPFILTER;
1818 }
1819
1820 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1821 s->acceptlocal = strtoul(buf, NULL, 0);
1822 s->flags |= DEV_OPT_ACCEPTLOCAL;
1823 }
1824
1825 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1826 s->igmpversion = strtoul(buf, NULL, 0);
1827 s->flags |= DEV_OPT_IGMPVERSION;
1828 }
1829
1830 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1831 s->mldversion = strtoul(buf, NULL, 0);
1832 s->flags |= DEV_OPT_MLDVERSION;
1833 }
1834
1835 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1836 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1837 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1838 }
1839
1840 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1841 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1842 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1843 }
1844
1845 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1846 s->neigh4locktime = strtol(buf, NULL, 0);
1847 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1848 }
1849
1850 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1851 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1852 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1853 }
1854
1855 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1856 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1857 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1858 }
1859
1860 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1861 s->dadtransmits = strtoul(buf, NULL, 0);
1862 s->flags |= DEV_OPT_DADTRANSMITS;
1863 }
1864
1865 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1866 s->sendredirects = strtoul(buf, NULL, 0);
1867 s->flags |= DEV_OPT_SENDREDIRECTS;
1868 }
1869
1870 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1871 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1872 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1873 }
1874
1875 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1876 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1877 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1878 }
1879
1880 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1881 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1882 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1883 }
1884
1885 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1886 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1887 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1888 }
1889
1890 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1891 s->arp_accept = strtoul(buf, NULL, 0);
1892 s->flags |= DEV_OPT_ARP_ACCEPT;
1893 }
1894 }
1895
1896 void
1897 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1898 {
1899 struct ifreq ifr;
1900 char buf[12];
1901
1902 apply_mask &= s->flags;
1903
1904 memset(&ifr, 0, sizeof(ifr));
1905 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1906 if (apply_mask & DEV_OPT_MTU) {
1907 ifr.ifr_mtu = s->mtu;
1908 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1909 s->flags &= ~DEV_OPT_MTU;
1910 }
1911 if (apply_mask & DEV_OPT_MTU6) {
1912 system_update_ipv6_mtu(dev, s->mtu6);
1913 }
1914 if (apply_mask & DEV_OPT_TXQUEUELEN) {
1915 ifr.ifr_qlen = s->txqueuelen;
1916 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1917 s->flags &= ~DEV_OPT_TXQUEUELEN;
1918 }
1919 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
1920 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1921 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1922 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1923 s->flags &= ~DEV_OPT_MACADDR;
1924 }
1925 if (apply_mask & DEV_OPT_IPV6)
1926 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1927 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
1928 struct device dummy = {
1929 .ifname = "all",
1930 };
1931 bool ip6segmentrouting = device_check_ip6segmentrouting();
1932
1933 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
1934 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
1935 }
1936 if (apply_mask & DEV_OPT_PROMISC) {
1937 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1938 !s->promisc ? IFF_PROMISC : 0) < 0)
1939 s->flags &= ~DEV_OPT_PROMISC;
1940 }
1941 if (apply_mask & DEV_OPT_RPFILTER) {
1942 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1943 system_set_rpfilter(dev, buf);
1944 }
1945 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
1946 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1947 if (apply_mask & DEV_OPT_IGMPVERSION) {
1948 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1949 system_set_igmpversion(dev, buf);
1950 }
1951 if (apply_mask & DEV_OPT_MLDVERSION) {
1952 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1953 system_set_mldversion(dev, buf);
1954 }
1955 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
1956 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1957 system_set_neigh4reachabletime(dev, buf);
1958 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1959 system_set_neigh6reachabletime(dev, buf);
1960 }
1961 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
1962 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1963 system_set_neigh4locktime(dev, buf);
1964 }
1965 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
1966 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1967 system_set_neigh4gcstaletime(dev, buf);
1968 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1969 system_set_neigh6gcstaletime(dev, buf);
1970 }
1971 if (apply_mask & DEV_OPT_DADTRANSMITS) {
1972 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1973 system_set_dadtransmits(dev, buf);
1974 }
1975 if (apply_mask & DEV_OPT_MULTICAST) {
1976 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1977 !s->multicast ? IFF_MULTICAST : 0) < 0)
1978 s->flags &= ~DEV_OPT_MULTICAST;
1979 }
1980 if (apply_mask & DEV_OPT_SENDREDIRECTS)
1981 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1982 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1983 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
1984 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1985 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
1986 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
1987 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
1988 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
1989 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
1990 if (apply_mask & DEV_OPT_ARP_ACCEPT)
1991 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
1992 system_set_ethtool_settings(dev, s);
1993 }
1994
1995 int system_if_up(struct device *dev)
1996 {
1997 return system_if_flags(dev->ifname, IFF_UP, 0);
1998 }
1999
2000 int system_if_down(struct device *dev)
2001 {
2002 return system_if_flags(dev->ifname, 0, IFF_UP);
2003 }
2004
2005 struct if_check_data {
2006 struct device *dev;
2007 int pending;
2008 int ret;
2009 };
2010
2011 #ifndef IFF_LOWER_UP
2012 #define IFF_LOWER_UP 0x10000
2013 #endif
2014
2015 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2016 {
2017 struct nlmsghdr *nh = nlmsg_hdr(msg);
2018 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2019 struct if_check_data *chk = (struct if_check_data *)arg;
2020
2021 if (nh->nlmsg_type != RTM_NEWLINK)
2022 return NL_SKIP;
2023
2024 if (chk->dev->type == &simple_device_type)
2025 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
2026 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
2027
2028 return NL_OK;
2029 }
2030
2031 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2032 {
2033 struct if_check_data *chk = (struct if_check_data *)arg;
2034 chk->pending = 0;
2035 return NL_STOP;
2036 }
2037
2038 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2039 {
2040 struct if_check_data *chk = (struct if_check_data *)arg;
2041
2042 if (chk->dev->type == &simple_device_type)
2043 device_set_present(chk->dev, false);
2044 device_set_link(chk->dev, false);
2045 chk->pending = err->error;
2046
2047 return NL_STOP;
2048 }
2049
2050 struct bridge_vlan_check_data {
2051 struct device *check_dev;
2052 int ifindex;
2053 int ret;
2054 bool pending;
2055 };
2056
2057 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2058 struct bridge_vlan_port *port,
2059 struct bridge_vlan_info *vinfo)
2060 {
2061 uint16_t flags = 0, diff, mask;
2062
2063 if (port->flags & BRVLAN_F_PVID)
2064 flags |= BRIDGE_VLAN_INFO_PVID;
2065 if (port->flags & BRVLAN_F_UNTAGGED)
2066 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2067
2068 diff = vinfo->flags ^ flags;
2069 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2070 if (diff & mask) {
2071 data->ret = 1;
2072 data->pending = false;
2073 }
2074
2075 port->check = 1;
2076 }
2077
2078 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2079 struct rtattr *attr)
2080 {
2081 struct bridge_vlan_hotplug_port *port;
2082 struct bridge_vlan_info *vinfo;
2083 struct bridge_vlan *vlan;
2084 struct rtattr *cur;
2085 int rem = RTA_PAYLOAD(attr);
2086 int i;
2087
2088 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2089 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2090 continue;
2091
2092 vinfo = RTA_DATA(cur);
2093 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2094 if (!vlan) {
2095 data->ret = 1;
2096 data->pending = false;
2097 return;
2098 }
2099
2100 for (i = 0; i < vlan->n_ports; i++)
2101 if (!vlan->ports[i].check)
2102 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2103
2104 list_for_each_entry(port, &vlan->hotplug_ports, list)
2105 if (!port->port.check)
2106 bridge_vlan_check_port(data, &port->port, vinfo);
2107 }
2108 }
2109
2110 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2111 {
2112 struct bridge_vlan_check_data *data = arg;
2113 struct nlmsghdr *nh = nlmsg_hdr(msg);
2114 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2115 struct rtattr *attr;
2116 int rem;
2117
2118 if (nh->nlmsg_type != RTM_NEWLINK)
2119 return NL_SKIP;
2120
2121 if (ifi->ifi_family != AF_BRIDGE)
2122 return NL_SKIP;
2123
2124 if (ifi->ifi_index != data->ifindex)
2125 return NL_SKIP;
2126
2127 attr = IFLA_RTA(ifi);
2128 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2129 while (RTA_OK(attr, rem)) {
2130 if (attr->rta_type == IFLA_AF_SPEC)
2131 bridge_vlan_check_attr(data, attr);
2132
2133 attr = RTA_NEXT(attr, rem);
2134 }
2135
2136 return NL_SKIP;
2137 }
2138
2139 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2140 {
2141 struct bridge_vlan_check_data *data = arg;
2142 data->pending = false;
2143 return NL_STOP;
2144 }
2145
2146 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2147 {
2148 struct bridge_vlan_check_data *data = arg;
2149 data->pending = false;
2150 return NL_STOP;
2151 }
2152
2153 int system_bridge_vlan_check(struct device *dev, char *ifname)
2154 {
2155 struct bridge_vlan_check_data data = {
2156 .check_dev = dev,
2157 .ifindex = if_nametoindex(ifname),
2158 .ret = -1,
2159 .pending = true,
2160 };
2161 static struct ifinfomsg ifi = {
2162 .ifi_family = AF_BRIDGE
2163 };
2164 static struct rtattr ext_req = {
2165 .rta_type = IFLA_EXT_MASK,
2166 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2167 };
2168 uint32_t filter = RTEXT_FILTER_BRVLAN;
2169 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2170 struct bridge_vlan *vlan;
2171 struct nl_msg *msg;
2172 int i;
2173
2174 if (!data.ifindex)
2175 return 0;
2176
2177 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2178
2179 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2180 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2181 nlmsg_append(msg, &filter, sizeof(filter), 0))
2182 goto free;
2183
2184 vlist_for_each_element(&dev->vlans, vlan, node) {
2185 struct bridge_vlan_hotplug_port *port;
2186
2187 for (i = 0; i < vlan->n_ports; i++) {
2188 if (!strcmp(vlan->ports[i].ifname, ifname))
2189 vlan->ports[i].check = 0;
2190 else
2191 vlan->ports[i].check = -1;
2192 }
2193
2194 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2195 if (!strcmp(port->port.ifname, ifname))
2196 port->port.check = 0;
2197 else
2198 port->port.check = -1;
2199 }
2200 }
2201
2202 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2203 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2204 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2205 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2206
2207 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2208 goto free;
2209
2210 data.ret = 0;
2211 while (data.pending)
2212 nl_recvmsgs(sock_rtnl, cb);
2213
2214 vlist_for_each_element(&dev->vlans, vlan, node) {
2215 struct bridge_vlan_hotplug_port *port;
2216
2217 for (i = 0; i < vlan->n_ports; i++) {
2218 if (!vlan->ports[i].check) {
2219 data.ret = 1;
2220 break;
2221 }
2222 }
2223
2224 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2225 if (!port->port.check) {
2226 data.ret = 1;
2227 break;
2228 }
2229 }
2230 }
2231
2232 goto out;
2233
2234 free:
2235 nlmsg_free(msg);
2236 out:
2237 nl_cb_put(cb);
2238 return data.ret;
2239 }
2240
2241 int system_if_check(struct device *dev)
2242 {
2243 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2244 struct nl_msg *msg;
2245 struct ifinfomsg ifi = {
2246 .ifi_family = AF_UNSPEC,
2247 .ifi_index = 0,
2248 };
2249 struct if_check_data chk = {
2250 .dev = dev,
2251 .pending = 1,
2252 };
2253 int ret = 1;
2254
2255 if (!cb)
2256 return ret;
2257
2258 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2259 if (!msg)
2260 goto out;
2261
2262 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2263 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2264 goto free;
2265
2266 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2267 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2268 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2269
2270 ret = nl_send_auto_complete(sock_rtnl, msg);
2271 if (ret < 0)
2272 goto free;
2273
2274 while (chk.pending > 0)
2275 nl_recvmsgs(sock_rtnl, cb);
2276
2277 ret = chk.pending;
2278
2279 free:
2280 nlmsg_free(msg);
2281 out:
2282 nl_cb_put(cb);
2283 return ret;
2284 }
2285
2286 struct device *
2287 system_if_get_parent(struct device *dev)
2288 {
2289 char buf[64], *devname;
2290 int ifindex, iflink;
2291
2292 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2293 return NULL;
2294
2295 iflink = strtoul(buf, NULL, 0);
2296 ifindex = system_if_resolve(dev);
2297 if (!iflink || iflink == ifindex)
2298 return NULL;
2299
2300 devname = if_indextoname(iflink, buf);
2301 if (!devname)
2302 return NULL;
2303
2304 return device_get(devname, true);
2305 }
2306
2307 static bool
2308 read_string_file(int dir_fd, const char *file, char *buf, int len)
2309 {
2310 bool ret = false;
2311 char *c;
2312 int fd;
2313
2314 fd = openat(dir_fd, file, O_RDONLY);
2315 if (fd < 0)
2316 return false;
2317
2318 retry:
2319 len = read(fd, buf, len - 1);
2320 if (len < 0) {
2321 if (errno == EINTR)
2322 goto retry;
2323 } else if (len > 0) {
2324 buf[len] = 0;
2325
2326 c = strchr(buf, '\n');
2327 if (c)
2328 *c = 0;
2329
2330 ret = true;
2331 }
2332
2333 close(fd);
2334
2335 return ret;
2336 }
2337
2338 static bool
2339 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2340 {
2341 char buf[64];
2342 bool ret = false;
2343
2344 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2345 if (ret)
2346 *val = strtoull(buf, NULL, 0);
2347
2348 return ret;
2349 }
2350
2351 /* Assume advertised flags == supported flags */
2352 static const struct {
2353 uint32_t mask;
2354 const char *name;
2355 } ethtool_link_modes[] = {
2356 { ADVERTISED_10baseT_Half, "10baseT-H" },
2357 { ADVERTISED_10baseT_Full, "10baseT-F" },
2358 { ADVERTISED_100baseT_Half, "100baseT-H" },
2359 { ADVERTISED_100baseT_Full, "100baseT-F" },
2360 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
2361 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
2362 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
2363 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
2364 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
2365 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
2366 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
2367 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
2368 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
2369 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
2370 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
2371 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
2372 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
2373 #ifdef ADVERTISED_56000baseKR4_Full
2374 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
2375 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
2376 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
2377 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
2378 #endif
2379 };
2380
2381 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
2382 {
2383 int i;
2384 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
2385 if (mask & ethtool_link_modes[i].mask)
2386 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
2387 }
2388 }
2389
2390 bool
2391 system_if_force_external(const char *ifname)
2392 {
2393 struct stat s;
2394
2395 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2396 }
2397
2398 int
2399 system_if_dump_info(struct device *dev, struct blob_buf *b)
2400 {
2401 struct ethtool_cmd ecmd;
2402 struct ifreq ifr;
2403 char *s;
2404 void *c;
2405
2406 memset(&ecmd, 0, sizeof(ecmd));
2407 memset(&ifr, 0, sizeof(ifr));
2408 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2409 ifr.ifr_data = (caddr_t) &ecmd;
2410 ecmd.cmd = ETHTOOL_GSET;
2411
2412 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2413 c = blobmsg_open_array(b, "link-advertising");
2414 system_add_link_modes(b, ecmd.advertising);
2415 blobmsg_close_array(b, c);
2416
2417 c = blobmsg_open_array(b, "link-partner-advertising");
2418 system_add_link_modes(b, ecmd.lp_advertising);
2419 blobmsg_close_array(b, c);
2420
2421 c = blobmsg_open_array(b, "link-supported");
2422 system_add_link_modes(b, ecmd.supported);
2423 blobmsg_close_array(b, c);
2424
2425 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2426 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2427 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2428 blobmsg_add_string_buffer(b);
2429
2430 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2431 }
2432
2433 return 0;
2434 }
2435
2436 int
2437 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2438 {
2439 const char *const counters[] = {
2440 "collisions", "rx_frame_errors", "tx_compressed",
2441 "multicast", "rx_length_errors", "tx_dropped",
2442 "rx_bytes", "rx_missed_errors", "tx_errors",
2443 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2444 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2445 "rx_dropped", "tx_aborted_errors", "tx_packets",
2446 "rx_errors", "tx_bytes", "tx_window_errors",
2447 "rx_fifo_errors", "tx_carrier_errors",
2448 };
2449 int stats_dir;
2450 int i;
2451 uint64_t val = 0;
2452
2453 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2454 if (stats_dir < 0)
2455 return -1;
2456
2457 for (i = 0; i < ARRAY_SIZE(counters); i++)
2458 if (read_uint64_file(stats_dir, counters[i], &val))
2459 blobmsg_add_u64(b, counters[i], val);
2460
2461 close(stats_dir);
2462 return 0;
2463 }
2464
2465 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2466 {
2467 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2468 int alen = v4 ? 4 : 16;
2469 unsigned int flags = 0;
2470 struct ifaddrmsg ifa = {
2471 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2472 .ifa_prefixlen = addr->mask,
2473 .ifa_index = dev->ifindex,
2474 };
2475
2476 struct nl_msg *msg;
2477 if (cmd == RTM_NEWADDR)
2478 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2479
2480 msg = nlmsg_alloc_simple(cmd, flags);
2481 if (!msg)
2482 return -1;
2483
2484 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2485 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2486 if (v4) {
2487 if (addr->broadcast)
2488 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2489 if (addr->point_to_point)
2490 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2491 } else {
2492 time_t now = system_get_rtime();
2493 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2494
2495 if (addr->preferred_until) {
2496 int64_t preferred = addr->preferred_until - now;
2497 if (preferred < 0)
2498 preferred = 0;
2499 else if (preferred > UINT32_MAX)
2500 preferred = UINT32_MAX;
2501
2502 cinfo.ifa_prefered = preferred;
2503 }
2504
2505 if (addr->valid_until) {
2506 int64_t valid = addr->valid_until - now;
2507 if (valid <= 0) {
2508 nlmsg_free(msg);
2509 return -1;
2510 }
2511 else if (valid > UINT32_MAX)
2512 valid = UINT32_MAX;
2513
2514 cinfo.ifa_valid = valid;
2515 }
2516
2517 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2518
2519 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2520 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2521 }
2522
2523 return system_rtnl_call(msg);
2524 }
2525
2526 int system_add_address(struct device *dev, struct device_addr *addr)
2527 {
2528 return system_addr(dev, addr, RTM_NEWADDR);
2529 }
2530
2531 int system_del_address(struct device *dev, struct device_addr *addr)
2532 {
2533 return system_addr(dev, addr, RTM_DELADDR);
2534 }
2535
2536 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2537 {
2538 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2539 unsigned int flags = 0;
2540 struct ndmsg ndm = {
2541 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2542 .ndm_ifindex = dev->ifindex,
2543 .ndm_state = NUD_PERMANENT,
2544 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2545 };
2546 struct nl_msg *msg;
2547
2548 if (cmd == RTM_NEWNEIGH)
2549 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2550
2551 msg = nlmsg_alloc_simple(cmd, flags);
2552
2553 if (!msg)
2554 return -1;
2555
2556 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2557
2558 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2559 if (neighbor->flags & DEVNEIGH_MAC)
2560 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2561
2562
2563 return system_rtnl_call(msg);
2564 }
2565
2566 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2567 {
2568 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2569 }
2570
2571 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2572 {
2573 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2574 }
2575
2576 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2577 {
2578 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2579 bool have_gw;
2580 unsigned int flags = 0;
2581
2582 if (alen == 4)
2583 have_gw = !!route->nexthop.in.s_addr;
2584 else
2585 have_gw = route->nexthop.in6.s6_addr32[0] ||
2586 route->nexthop.in6.s6_addr32[1] ||
2587 route->nexthop.in6.s6_addr32[2] ||
2588 route->nexthop.in6.s6_addr32[3];
2589
2590 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2591 ? route->table : RT_TABLE_MAIN;
2592
2593 struct rtmsg rtm = {
2594 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2595 .rtm_dst_len = route->mask,
2596 .rtm_src_len = route->sourcemask,
2597 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2598 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2599 .rtm_scope = RT_SCOPE_NOWHERE,
2600 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2601 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2602 };
2603 struct nl_msg *msg;
2604
2605 if (cmd == RTM_NEWROUTE) {
2606 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2607
2608 if (!dev) { /* Add null-route */
2609 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2610 rtm.rtm_type = RTN_UNREACHABLE;
2611 }
2612 else
2613 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2614 }
2615
2616 if (route->flags & DEVROUTE_TYPE) {
2617 rtm.rtm_type = route->type;
2618 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2619 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2620 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2621 rtm.rtm_table = RT_TABLE_LOCAL;
2622 }
2623
2624 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2625 rtm.rtm_scope = RT_SCOPE_HOST;
2626 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2627 rtm.rtm_type == RTN_ANYCAST) {
2628 rtm.rtm_scope = RT_SCOPE_LINK;
2629 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2630 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2631 rtm.rtm_type == RTN_THROW) {
2632 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2633 dev = NULL;
2634 }
2635 }
2636
2637 msg = nlmsg_alloc_simple(cmd, flags);
2638 if (!msg)
2639 return -1;
2640
2641 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2642
2643 if (route->mask)
2644 nla_put(msg, RTA_DST, alen, &route->addr);
2645
2646 if (route->sourcemask) {
2647 if (rtm.rtm_family == AF_INET)
2648 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2649 else
2650 nla_put(msg, RTA_SRC, alen, &route->source);
2651 }
2652
2653 if (route->metric > 0)
2654 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2655
2656 if (have_gw)
2657 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2658
2659 if (dev)
2660 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2661
2662 if (table >= 256)
2663 nla_put_u32(msg, RTA_TABLE, table);
2664
2665 if (route->flags & DEVROUTE_MTU) {
2666 struct nlattr *metrics;
2667
2668 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2669 goto nla_put_failure;
2670
2671 nla_put_u32(msg, RTAX_MTU, route->mtu);
2672
2673 nla_nest_end(msg, metrics);
2674 }
2675
2676 return system_rtnl_call(msg);
2677
2678 nla_put_failure:
2679 nlmsg_free(msg);
2680 return -ENOMEM;
2681 }
2682
2683 int system_add_route(struct device *dev, struct device_route *route)
2684 {
2685 return system_rt(dev, route, RTM_NEWROUTE);
2686 }
2687
2688 int system_del_route(struct device *dev, struct device_route *route)
2689 {
2690 return system_rt(dev, route, RTM_DELROUTE);
2691 }
2692
2693 int system_flush_routes(void)
2694 {
2695 const char *names[] = { "ipv4", "ipv6" };
2696 int fd, i;
2697
2698 for (i = 0; i < ARRAY_SIZE(names); i++) {
2699 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
2700 fd = open(dev_buf, O_WRONLY);
2701 if (fd < 0)
2702 continue;
2703
2704 if (write(fd, "-1", 2)) {}
2705 close(fd);
2706 }
2707 return 0;
2708 }
2709
2710 bool system_resolve_rt_type(const char *type, unsigned int *id)
2711 {
2712 return system_rtn_aton(type, id);
2713 }
2714
2715 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2716 {
2717 FILE *f;
2718 char *e, buf[128];
2719 unsigned int n, proto = 256;
2720 n = strtoul(type, &e, 0);
2721 if (!*e && e != type)
2722 proto = n;
2723 else if (!strcmp(type, "unspec"))
2724 proto = RTPROT_UNSPEC;
2725 else if (!strcmp(type, "kernel"))
2726 proto = RTPROT_KERNEL;
2727 else if (!strcmp(type, "boot"))
2728 proto = RTPROT_BOOT;
2729 else if (!strcmp(type, "static"))
2730 proto = RTPROT_STATIC;
2731 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2732 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2733 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2734 continue;
2735
2736 n = strtoul(e, NULL, 10);
2737 e = strtok(NULL, " \t\n");
2738
2739 if (e && !strcmp(e, type)) {
2740 proto = n;
2741 break;
2742 }
2743 }
2744 fclose(f);
2745 }
2746
2747 if (proto > 255)
2748 return false;
2749
2750 *id = proto;
2751 return true;
2752 }
2753
2754 bool system_resolve_rt_table(const char *name, unsigned int *id)
2755 {
2756 FILE *f;
2757 char *e, buf[128];
2758 unsigned int n, table = RT_TABLE_UNSPEC;
2759
2760 /* first try to parse table as number */
2761 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2762 table = n;
2763
2764 /* handle well known aliases */
2765 else if (!strcmp(name, "default"))
2766 table = RT_TABLE_DEFAULT;
2767 else if (!strcmp(name, "main"))
2768 table = RT_TABLE_MAIN;
2769 else if (!strcmp(name, "local"))
2770 table = RT_TABLE_LOCAL;
2771
2772 /* try to look up name in /etc/iproute2/rt_tables */
2773 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2774 {
2775 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2776 {
2777 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2778 continue;
2779
2780 n = strtoul(e, NULL, 10);
2781 e = strtok(NULL, " \t\n");
2782
2783 if (e && !strcmp(e, name))
2784 {
2785 table = n;
2786 break;
2787 }
2788 }
2789
2790 fclose(f);
2791 }
2792
2793 if (table == RT_TABLE_UNSPEC)
2794 return false;
2795
2796 *id = table;
2797 return true;
2798 }
2799
2800 bool system_is_default_rt_table(unsigned int id)
2801 {
2802 return (id == RT_TABLE_MAIN);
2803 }
2804
2805 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2806 {
2807 char *e;
2808 unsigned int n;
2809
2810 if (!strcmp(filter, "strict"))
2811 n = 1;
2812 else if (!strcmp(filter, "loose"))
2813 n = 2;
2814 else {
2815 n = strtoul(filter, &e, 0);
2816 if (*e || e == filter || n > 2)
2817 return false;
2818 }
2819
2820 *id = n;
2821 return true;
2822 }
2823
2824 static int system_iprule(struct iprule *rule, int cmd)
2825 {
2826 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2827
2828 struct nl_msg *msg;
2829 struct rtmsg rtm = {
2830 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2831 .rtm_protocol = RTPROT_STATIC,
2832 .rtm_scope = RT_SCOPE_UNIVERSE,
2833 .rtm_table = RT_TABLE_UNSPEC,
2834 .rtm_type = RTN_UNSPEC,
2835 .rtm_flags = 0,
2836 };
2837
2838 if (cmd == RTM_NEWRULE)
2839 rtm.rtm_type = RTN_UNICAST;
2840
2841 if (rule->invert)
2842 rtm.rtm_flags |= FIB_RULE_INVERT;
2843
2844 if (rule->flags & IPRULE_SRC)
2845 rtm.rtm_src_len = rule->src_mask;
2846
2847 if (rule->flags & IPRULE_DEST)
2848 rtm.rtm_dst_len = rule->dest_mask;
2849
2850 if (rule->flags & IPRULE_TOS)
2851 rtm.rtm_tos = rule->tos;
2852
2853 if (rule->flags & IPRULE_LOOKUP) {
2854 if (rule->lookup < 256)
2855 rtm.rtm_table = rule->lookup;
2856 }
2857
2858 if (rule->flags & IPRULE_ACTION)
2859 rtm.rtm_type = rule->action;
2860 else if (rule->flags & IPRULE_GOTO)
2861 rtm.rtm_type = FR_ACT_GOTO;
2862 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2863 rtm.rtm_type = FR_ACT_NOP;
2864
2865 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2866
2867 if (!msg)
2868 return -1;
2869
2870 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2871
2872 if (rule->flags & IPRULE_IN)
2873 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2874
2875 if (rule->flags & IPRULE_OUT)
2876 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2877
2878 if (rule->flags & IPRULE_SRC)
2879 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2880
2881 if (rule->flags & IPRULE_DEST)
2882 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2883
2884 if (rule->flags & IPRULE_PRIORITY)
2885 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2886 else if (cmd == RTM_NEWRULE)
2887 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2888
2889 if (rule->flags & IPRULE_FWMARK)
2890 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2891
2892 if (rule->flags & IPRULE_FWMASK)
2893 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2894
2895 if (rule->flags & IPRULE_LOOKUP) {
2896 if (rule->lookup >= 256)
2897 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2898 }
2899
2900 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2901 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2902
2903 if (rule->flags & IPRULE_GOTO)
2904 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2905
2906 return system_rtnl_call(msg);
2907 }
2908
2909 int system_add_iprule(struct iprule *rule)
2910 {
2911 return system_iprule(rule, RTM_NEWRULE);
2912 }
2913
2914 int system_del_iprule(struct iprule *rule)
2915 {
2916 return system_iprule(rule, RTM_DELRULE);
2917 }
2918
2919 int system_flush_iprules(void)
2920 {
2921 int rv = 0;
2922 struct iprule rule;
2923
2924 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2925 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2926
2927 memset(&rule, 0, sizeof(rule));
2928
2929
2930 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2931
2932 rule.priority = 0;
2933 rule.lookup = RT_TABLE_LOCAL;
2934 rv |= system_iprule(&rule, RTM_NEWRULE);
2935
2936 rule.priority = 32766;
2937 rule.lookup = RT_TABLE_MAIN;
2938 rv |= system_iprule(&rule, RTM_NEWRULE);
2939
2940 rule.priority = 32767;
2941 rule.lookup = RT_TABLE_DEFAULT;
2942 rv |= system_iprule(&rule, RTM_NEWRULE);
2943
2944
2945 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2946
2947 rule.priority = 0;
2948 rule.lookup = RT_TABLE_LOCAL;
2949 rv |= system_iprule(&rule, RTM_NEWRULE);
2950
2951 rule.priority = 32766;
2952 rule.lookup = RT_TABLE_MAIN;
2953 rv |= system_iprule(&rule, RTM_NEWRULE);
2954
2955 return rv;
2956 }
2957
2958 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2959 {
2960 return system_rtn_aton(action, id);
2961 }
2962
2963 time_t system_get_rtime(void)
2964 {
2965 struct timespec ts;
2966 struct timeval tv;
2967
2968 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2969 return ts.tv_sec;
2970
2971 if (gettimeofday(&tv, NULL) == 0)
2972 return tv.tv_sec;
2973
2974 return 0;
2975 }
2976
2977 #ifndef IP_DF
2978 #define IP_DF 0x4000
2979 #endif
2980
2981 static int tunnel_ioctl(const char *name, int cmd, void *p)
2982 {
2983 struct ifreq ifr;
2984
2985 memset(&ifr, 0, sizeof(ifr));
2986 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2987 ifr.ifr_ifru.ifru_data = p;
2988 return ioctl(sock_ioctl, cmd, &ifr);
2989 }
2990
2991 #ifdef IFLA_IPTUN_MAX
2992 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2993 struct blob_attr **tb)
2994 {
2995 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2996 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2997 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2998 struct blob_attr *cur;
2999 int ret = 0, ttl = 0;
3000
3001 if (!nlm)
3002 return -1;
3003
3004 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3005 nla_put_string(nlm, IFLA_IFNAME, name);
3006
3007 if (link)
3008 nla_put_u32(nlm, IFLA_LINK, link);
3009
3010 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3011 if (!linkinfo) {
3012 ret = -ENOMEM;
3013 goto failure;
3014 }
3015
3016 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3017 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3018 if (!infodata) {
3019 ret = -ENOMEM;
3020 goto failure;
3021 }
3022
3023 if (link)
3024 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3025
3026 if ((cur = tb[TUNNEL_ATTR_TTL]))
3027 ttl = blobmsg_get_u32(cur);
3028
3029 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3030 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3031
3032 struct in6_addr in6buf;
3033 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3034 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3035 ret = -EINVAL;
3036 goto failure;
3037 }
3038 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3039 }
3040
3041 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3042 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3043 ret = -EINVAL;
3044 goto failure;
3045 }
3046 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3047 }
3048
3049 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3050 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3051 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3052
3053 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3054 blobmsg_data(cur), blobmsg_len(cur));
3055
3056 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3057 char *str = blobmsg_get_string(cur);
3058
3059 if (strcmp(str, "ignore")) {
3060 char *e;
3061 unsigned encap_limit = strtoul(str, &e, 0);
3062
3063 if (e == str || *e || encap_limit > 255) {
3064 ret = -EINVAL;
3065 goto failure;
3066 }
3067
3068 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3069 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3070 }
3071 }
3072
3073 #ifdef IFLA_IPTUN_FMR_MAX
3074 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3075 struct blob_attr *rcur;
3076 unsigned rrem, fmrcnt = 0;
3077 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3078
3079 if (!fmrs) {
3080 ret = -ENOMEM;
3081 goto failure;
3082 }
3083
3084 blobmsg_for_each_attr(rcur, cur, rrem) {
3085 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3086 struct in6_addr ip6prefix;
3087 struct in_addr ip4prefix;
3088 unsigned ip4len, ip6len, ealen, offset;
3089
3090 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3091 blobmsg_data(rcur), blobmsg_len(rcur));
3092
3093 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3094 !parse_ip_and_netmask(AF_INET6,
3095 blobmsg_data(tb_cur), &ip6prefix,
3096 &ip6len)) {
3097 ret = -EINVAL;
3098 goto failure;
3099 }
3100
3101 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3102 !parse_ip_and_netmask(AF_INET,
3103 blobmsg_data(tb_cur), &ip4prefix,
3104 &ip4len)) {
3105 ret = -EINVAL;
3106 goto failure;
3107 }
3108
3109 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3110 ret = -EINVAL;
3111 goto failure;
3112 }
3113 ealen = blobmsg_get_u32(tb_cur);
3114
3115 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3116 ret = -EINVAL;
3117 goto failure;
3118 }
3119 offset = blobmsg_get_u32(tb_cur);
3120
3121 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3122 if (!rule) {
3123 ret = -ENOMEM;
3124 goto failure;
3125 }
3126
3127 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3128 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3129 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3130 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3131 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3132 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3133
3134 nla_nest_end(nlm, rule);
3135 }
3136
3137 nla_nest_end(nlm, fmrs);
3138 }
3139 #endif
3140 if (tun_flags)
3141 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3142 }
3143
3144 nla_nest_end(nlm, infodata);
3145 nla_nest_end(nlm, linkinfo);
3146
3147 return system_rtnl_call(nlm);
3148
3149 failure:
3150 nlmsg_free(nlm);
3151 return ret;
3152 }
3153 #endif
3154
3155 #ifdef IFLA_IPTUN_MAX
3156 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3157 static int system_add_gre_tunnel(const char *name, const char *kind,
3158 const unsigned int link, struct blob_attr **tb, bool v6)
3159 {
3160 struct nl_msg *nlm;
3161 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3162 struct blob_attr *cur;
3163 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3164 uint16_t iflags = 0, oflags = 0;
3165 uint8_t tos = 0;
3166 int ret = 0, ttl = 0;
3167 unsigned encap_limit = 0;
3168
3169 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3170 if (!nlm)
3171 return -1;
3172
3173 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3174 nla_put_string(nlm, IFLA_IFNAME, name);
3175
3176 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3177 if (!linkinfo) {
3178 ret = -ENOMEM;
3179 goto failure;
3180 }
3181
3182 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3183 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3184 if (!infodata) {
3185 ret = -ENOMEM;
3186 goto failure;
3187 }
3188
3189 if (link)
3190 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3191
3192 if ((cur = tb[TUNNEL_ATTR_TTL]))
3193 ttl = blobmsg_get_u32(cur);
3194
3195 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3196 char *str = blobmsg_get_string(cur);
3197 if (strcmp(str, "inherit")) {
3198 unsigned uval;
3199
3200 if (!system_tos_aton(str, &uval)) {
3201 ret = -EINVAL;
3202 goto failure;
3203 }
3204
3205 if (v6)
3206 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3207 else
3208 tos = uval;
3209 } else {
3210 if (v6)
3211 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3212 else
3213 tos = 1;
3214 }
3215 }
3216
3217 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3218 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3219
3220 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3221 blobmsg_data(cur), blobmsg_len(cur));
3222
3223 if ((cur = tb_data[GRE_DATA_IKEY])) {
3224 if ((ikey = blobmsg_get_u32(cur)))
3225 iflags |= GRE_KEY;
3226 }
3227
3228 if ((cur = tb_data[GRE_DATA_OKEY])) {
3229 if ((okey = blobmsg_get_u32(cur)))
3230 oflags |= GRE_KEY;
3231 }
3232
3233 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3234 if (blobmsg_get_bool(cur))
3235 iflags |= GRE_CSUM;
3236 }
3237
3238 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3239 if (blobmsg_get_bool(cur))
3240 oflags |= GRE_CSUM;
3241 }
3242
3243 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3244 if (blobmsg_get_bool(cur))
3245 iflags |= GRE_SEQ;
3246 }
3247
3248 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3249 if (blobmsg_get_bool(cur))
3250 oflags |= GRE_SEQ;
3251 }
3252
3253 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3254 char *str = blobmsg_get_string(cur);
3255
3256 if (strcmp(str, "ignore")) {
3257 char *e;
3258
3259 encap_limit = strtoul(str, &e, 0);
3260
3261 if (e == str || *e || encap_limit > 255) {
3262 ret = -EINVAL;
3263 goto failure;
3264 }
3265
3266 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3267 }
3268 }
3269 }
3270
3271 if (v6) {
3272 struct in6_addr in6buf;
3273 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3274 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3275 ret = -EINVAL;
3276 goto failure;
3277 }
3278 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3279 }
3280
3281 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3282 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3283 ret = -EINVAL;
3284 goto failure;
3285 }
3286 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3287 }
3288
3289 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3290 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3291
3292 if (flowinfo)
3293 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3294
3295 if (flags6)
3296 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3297
3298 if (!ttl)
3299 ttl = 64;
3300 } else {
3301 struct in_addr inbuf;
3302 bool set_df = true;
3303
3304 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3305 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3306 ret = -EINVAL;
3307 goto failure;
3308 }
3309 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3310 }
3311
3312 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3313 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3314 ret = -EINVAL;
3315 goto failure;
3316 }
3317 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3318
3319 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3320 if (!okey) {
3321 okey = inbuf.s_addr;
3322 oflags |= GRE_KEY;
3323 }
3324
3325 if (!ikey) {
3326 ikey = inbuf.s_addr;
3327 iflags |= GRE_KEY;
3328 }
3329 }
3330 }
3331
3332 if ((cur = tb[TUNNEL_ATTR_DF]))
3333 set_df = blobmsg_get_bool(cur);
3334
3335 if (!set_df) {
3336 /* ttl != 0 and nopmtudisc are incompatible */
3337 if (ttl) {
3338 ret = -EINVAL;
3339 goto failure;
3340 }
3341 } else if (!ttl)
3342 ttl = 64;
3343
3344 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3345
3346 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3347 }
3348
3349 if (ttl)
3350 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3351
3352 if (oflags)
3353 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3354
3355 if (iflags)
3356 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3357
3358 if (okey)
3359 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3360
3361 if (ikey)
3362 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3363
3364 nla_nest_end(nlm, infodata);
3365 nla_nest_end(nlm, linkinfo);
3366
3367 return system_rtnl_call(nlm);
3368
3369 failure:
3370 nlmsg_free(nlm);
3371 return ret;
3372 }
3373 #endif
3374
3375 #ifdef IFLA_VTI_MAX
3376 static int system_add_vti_tunnel(const char *name, const char *kind,
3377 const unsigned int link, struct blob_attr **tb, bool v6)
3378 {
3379 struct nl_msg *nlm;
3380 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3381 struct blob_attr *cur;
3382 int ret = 0;
3383
3384 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3385 if (!nlm)
3386 return -1;
3387
3388 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3389 nla_put_string(nlm, IFLA_IFNAME, name);
3390
3391 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3392 if (!linkinfo) {
3393 ret = -ENOMEM;
3394 goto failure;
3395 }
3396
3397 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3398 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3399 if (!infodata) {
3400 ret = -ENOMEM;
3401 goto failure;
3402 }
3403
3404 if (link)
3405 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3406
3407 if (v6) {
3408 struct in6_addr in6buf;
3409 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3410 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3411 ret = -EINVAL;
3412 goto failure;
3413 }
3414 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3415 }
3416
3417 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3418 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3419 ret = -EINVAL;
3420 goto failure;
3421 }
3422 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3423 }
3424
3425 } else {
3426 struct in_addr inbuf;
3427
3428 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3429 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3430 ret = -EINVAL;
3431 goto failure;
3432 }
3433 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3434 }
3435
3436 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3437 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3438 ret = -EINVAL;
3439 goto failure;
3440 }
3441 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3442 }
3443
3444 }
3445
3446 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3447 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3448 uint32_t ikey = 0, okey = 0;
3449
3450 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3451 blobmsg_data(cur), blobmsg_len(cur));
3452
3453 if ((cur = tb_data[VTI_DATA_IKEY])) {
3454 if ((ikey = blobmsg_get_u32(cur)))
3455 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3456 }
3457
3458 if ((cur = tb_data[VTI_DATA_OKEY])) {
3459 if ((okey = blobmsg_get_u32(cur)))
3460 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3461 }
3462 }
3463
3464 nla_nest_end(nlm, infodata);
3465 nla_nest_end(nlm, linkinfo);
3466
3467 return system_rtnl_call(nlm);
3468
3469 failure:
3470 nlmsg_free(nlm);
3471 return ret;
3472 }
3473 #endif
3474
3475 #ifdef IFLA_XFRM_MAX
3476 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3477 const unsigned int link, struct blob_attr **tb)
3478 {
3479 struct nl_msg *nlm;
3480 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3481 struct blob_attr *cur;
3482 int ret = 0;
3483
3484 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3485 if (!nlm)
3486 return -1;
3487
3488 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3489 nla_put_string(nlm, IFLA_IFNAME, name);
3490
3491 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3492 if (!linkinfo) {
3493 ret = -ENOMEM;
3494 goto failure;
3495 }
3496
3497 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3498 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3499 if (!infodata) {
3500 ret = -ENOMEM;
3501 goto failure;
3502 }
3503
3504 if (link)
3505 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3506
3507 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3508 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3509 uint32_t if_id = 0;
3510
3511 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3512 blobmsg_data(cur), blobmsg_len(cur));
3513
3514 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3515 if ((if_id = blobmsg_get_u32(cur)))
3516 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3517 }
3518
3519 }
3520
3521 nla_nest_end(nlm, infodata);
3522 nla_nest_end(nlm, linkinfo);
3523
3524 return system_rtnl_call(nlm);
3525
3526 failure:
3527 nlmsg_free(nlm);
3528 return ret;
3529 }
3530 #endif
3531
3532 #ifdef IFLA_VXLAN_MAX
3533 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3534 struct blob_attr *cur;
3535 if ((cur = tb_data[vxlandatatype])) {
3536 bool val = blobmsg_get_bool(cur);
3537 if (invert)
3538 val = !val;
3539
3540 if ((attrtype == IFLA_VXLAN_GBP) && val)
3541 nla_put_flag(msg, attrtype);
3542 else
3543 nla_put_u8(msg, attrtype, val);
3544
3545 }
3546 }
3547
3548 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3549 {
3550 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3551 struct nl_msg *msg;
3552 struct nlattr *linkinfo, *data;
3553 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3554 struct blob_attr *cur;
3555 int ret = 0;
3556
3557 if ((cur = tb[TUNNEL_ATTR_DATA]))
3558 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3559 blobmsg_data(cur), blobmsg_len(cur));
3560 else
3561 return -EINVAL;
3562
3563 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3564
3565 if (!msg)
3566 return -1;
3567
3568 nlmsg_append(msg, &iim, sizeof(iim), 0);
3569
3570 nla_put_string(msg, IFLA_IFNAME, name);
3571
3572 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3573 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3574 if (!ea) {
3575 ret = -EINVAL;
3576 goto failure;
3577 }
3578
3579 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3580 }
3581
3582 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3583 uint32_t mtu = blobmsg_get_u32(cur);
3584 nla_put_u32(msg, IFLA_MTU, mtu);
3585 }
3586
3587 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3588 ret = -ENOMEM;
3589 goto failure;
3590 }
3591
3592 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3593
3594 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3595 ret = -ENOMEM;
3596 goto failure;
3597 }
3598
3599 if (link)
3600 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3601
3602 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3603 uint32_t id = blobmsg_get_u32(cur);
3604 if (id >= (1u << 24) - 1) {
3605 ret = -EINVAL;
3606 goto failure;
3607 }
3608
3609 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3610 }
3611
3612 if (v6) {
3613 struct in6_addr in6buf;
3614 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3615 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3616 ret = -EINVAL;
3617 goto failure;
3618 }
3619 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3620 }
3621
3622 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3623 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3624 ret = -EINVAL;
3625 goto failure;
3626 }
3627 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3628 }
3629 } else {
3630 struct in_addr inbuf;
3631
3632 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3633 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3634 ret = -EINVAL;
3635 goto failure;
3636 }
3637 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3638 }
3639
3640 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3641 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3642 ret = -EINVAL;
3643 goto failure;
3644 }
3645 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3646 }
3647 }
3648
3649 uint32_t port = 4789;
3650 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3651 port = blobmsg_get_u32(cur);
3652 if (port < 1 || port > 65535) {
3653 ret = -EINVAL;
3654 goto failure;
3655 }
3656 }
3657 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3658
3659 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3660 struct ifla_vxlan_port_range srcports = {0,0};
3661
3662 uint32_t low = blobmsg_get_u32(cur);
3663 if (low < 1 || low > 65535 - 1) {
3664 ret = -EINVAL;
3665 goto failure;
3666 }
3667
3668 srcports.low = htons((uint16_t) low);
3669 srcports.high = htons((uint16_t) (low+1));
3670
3671 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3672 uint32_t high = blobmsg_get_u32(cur);
3673 if (high < 1 || high > 65535) {
3674 ret = -EINVAL;
3675 goto failure;
3676 }
3677
3678 if (high > low)
3679 srcports.high = htons((uint16_t) high);
3680 }
3681
3682 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3683 }
3684
3685 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3686 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3687 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3688 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3689 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3690 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3691 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3692 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3693 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3694
3695 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3696 uint32_t ageing = blobmsg_get_u32(cur);
3697 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3698 }
3699
3700 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3701 uint32_t maxaddress = blobmsg_get_u32(cur);
3702 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3703 }
3704
3705 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3706 char *str = blobmsg_get_string(cur);
3707 unsigned tos = 1;
3708
3709 if (strcmp(str, "inherit")) {
3710 if (!system_tos_aton(str, &tos)) {
3711 ret = -EINVAL;
3712 goto failure;
3713 }
3714 }
3715
3716 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3717 }
3718
3719 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3720 uint32_t ttl = blobmsg_get_u32(cur);
3721 if (ttl < 1 || ttl > 255) {
3722 ret = -EINVAL;
3723 goto failure;
3724 }
3725
3726 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3727 }
3728
3729 nla_nest_end(msg, data);
3730 nla_nest_end(msg, linkinfo);
3731
3732 ret = system_rtnl_call(msg);
3733 if (ret)
3734 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3735
3736 return ret;
3737
3738 failure:
3739 nlmsg_free(msg);
3740 return ret;
3741 }
3742 #endif
3743
3744 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3745 {
3746 struct blob_attr *cur;
3747 int ret = 0;
3748
3749 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3750 return -1;
3751
3752 #ifdef SIOCADD6RD
3753 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3754 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3755 unsigned int mask;
3756 struct ip_tunnel_6rd p6;
3757
3758 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3759 blobmsg_data(cur), blobmsg_len(cur));
3760
3761 memset(&p6, 0, sizeof(p6));
3762
3763 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3764 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3765 &p6.prefix, &mask) || mask > 128) {
3766 ret = -EINVAL;
3767 goto failure;
3768 }
3769
3770 p6.prefixlen = mask;
3771 }
3772
3773 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3774 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3775 &p6.relay_prefix, &mask) || mask > 32) {
3776 ret = -EINVAL;
3777 goto failure;
3778 }
3779
3780 p6.relay_prefixlen = mask;
3781 }
3782
3783 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3784 ret = -1;
3785 goto failure;
3786 }
3787 }
3788 #endif
3789
3790 return ret;
3791
3792 failure:
3793 system_link_del(name);
3794 return ret;
3795 }
3796
3797 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3798 {
3799 struct blob_attr *cur;
3800 bool set_df = true;
3801 struct ip_tunnel_parm p = {
3802 .link = link,
3803 .iph = {
3804 .version = 4,
3805 .ihl = 5,
3806 .protocol = proto,
3807 }
3808 };
3809
3810 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3811 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3812 return -EINVAL;
3813
3814 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3815 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3816 return -EINVAL;
3817
3818 if ((cur = tb[TUNNEL_ATTR_DF]))
3819 set_df = blobmsg_get_bool(cur);
3820
3821 if ((cur = tb[TUNNEL_ATTR_TTL]))
3822 p.iph.ttl = blobmsg_get_u32(cur);
3823
3824 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3825 char *str = blobmsg_get_string(cur);
3826 if (strcmp(str, "inherit")) {
3827 unsigned uval;
3828
3829 if (!system_tos_aton(str, &uval))
3830 return -EINVAL;
3831
3832 p.iph.tos = uval;
3833 } else
3834 p.iph.tos = 1;
3835 }
3836
3837 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3838 /* ttl !=0 and nopmtudisc are incompatible */
3839 if (p.iph.ttl && p.iph.frag_off == 0)
3840 return -EINVAL;
3841
3842 strncpy(p.name, name, sizeof(p.name) - 1);
3843
3844 switch (p.iph.protocol) {
3845 case IPPROTO_IPIP:
3846 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3847 case IPPROTO_IPV6:
3848 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3849 default:
3850 break;
3851 }
3852 return -1;
3853 }
3854
3855 int system_del_ip_tunnel(const struct device *dev)
3856 {
3857 return system_link_del(dev->ifname);
3858 }
3859
3860 int system_update_ipv6_mtu(struct device *dev, int mtu)
3861 {
3862 int ret = -1;
3863 char buf[64];
3864 int fd;
3865
3866 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
3867 if (fd < 0)
3868 return ret;
3869
3870 if (!mtu) {
3871 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3872 if (len < 0)
3873 goto out;
3874
3875 buf[len] = 0;
3876 ret = atoi(buf);
3877 } else {
3878 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3879 ret = mtu;
3880 }
3881
3882 out:
3883 close(fd);
3884 return ret;
3885 }
3886
3887 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
3888 {
3889 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3890 struct blob_attr *cur;
3891 const char *str;
3892
3893 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3894 blob_data(attr), blob_len(attr));
3895
3896 system_link_del(dev->ifname);
3897
3898 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3899 return -EINVAL;
3900 str = blobmsg_data(cur);
3901
3902 unsigned int ttl = 0;
3903 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3904 ttl = blobmsg_get_u32(cur);
3905 if (ttl > 255)
3906 return -EINVAL;
3907 }
3908
3909 unsigned int link = 0;
3910 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3911 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3912 if (!iface)
3913 return -EINVAL;
3914
3915 if (iface->l3_dev.dev)
3916 link = iface->l3_dev.dev->ifindex;
3917 }
3918
3919 if (!strcmp(str, "sit"))
3920 return system_add_sit_tunnel(dev->ifname, link, tb);
3921 #ifdef IFLA_IPTUN_MAX
3922 else if (!strcmp(str, "ipip6")) {
3923 return system_add_ip6_tunnel(dev->ifname, link, tb);
3924 } else if (!strcmp(str, "greip")) {
3925 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
3926 } else if (!strcmp(str, "gretapip")) {
3927 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
3928 } else if (!strcmp(str, "greip6")) {
3929 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
3930 } else if (!strcmp(str, "gretapip6")) {
3931 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
3932 #ifdef IFLA_VTI_MAX
3933 } else if (!strcmp(str, "vtiip")) {
3934 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
3935 } else if (!strcmp(str, "vtiip6")) {
3936 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
3937 #endif
3938 #ifdef IFLA_XFRM_MAX
3939 } else if (!strcmp(str, "xfrm")) {
3940 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
3941 #endif
3942 #ifdef IFLA_VXLAN_MAX
3943 } else if(!strcmp(str, "vxlan")) {
3944 return system_add_vxlan(dev->ifname, link, tb, false);
3945 } else if(!strcmp(str, "vxlan6")) {
3946 return system_add_vxlan(dev->ifname, link, tb, true);
3947 #endif
3948 #endif
3949 } else if (!strcmp(str, "ipip")) {
3950 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
3951 }
3952 else
3953 return -EINVAL;
3954
3955 return 0;
3956 }
OpenWrt Network interface configuration daemon