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9846e98882362079e0ff8fda25591221cc10755c
[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 static const char *
2399 system_netdevtype_name(unsigned short dev_type)
2400 {
2401 unsigned int i;
2402
2403 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2404 if (netdev_types[i].id == dev_type)
2405 return netdev_types[i].name;
2406 }
2407
2408 /* the last key is used by default */
2409 i = ARRAY_SIZE(netdev_types) - 1;
2410
2411 return netdev_types[i].name;
2412 }
2413
2414 static void
2415 system_add_devtype(struct blob_buf *b, const char *ifname)
2416 {
2417 char buf[100];
2418 bool found = false;
2419
2420 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2421 const char *info = "DEVTYPE=";
2422 char *context = NULL;
2423 const char *line = strtok_r(buf, "\r\n", &context);
2424
2425 while (line != NULL) {
2426 char *index = strstr(line, info);
2427
2428 if (index != NULL) {
2429 blobmsg_add_string(b, "devtype", index + strlen(info));
2430 found = true;
2431 break;
2432 }
2433
2434 line = strtok_r(NULL, "\r\n", &context);
2435 }
2436 }
2437
2438 if (!found) {
2439 unsigned short number = 0;
2440 const char *name = NULL;
2441
2442 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2443 number = strtoul(buf, NULL, 0);
2444 name = system_netdevtype_name(number);
2445 blobmsg_add_string(b, "devtype", name);
2446 }
2447 }
2448 }
2449
2450 int
2451 system_if_dump_info(struct device *dev, struct blob_buf *b)
2452 {
2453 struct ethtool_cmd ecmd;
2454 struct ifreq ifr;
2455 char *s;
2456 void *c;
2457
2458 memset(&ecmd, 0, sizeof(ecmd));
2459 memset(&ifr, 0, sizeof(ifr));
2460 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2461 ifr.ifr_data = (caddr_t) &ecmd;
2462 ecmd.cmd = ETHTOOL_GSET;
2463
2464 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2465 c = blobmsg_open_array(b, "link-advertising");
2466 system_add_link_modes(b, ecmd.advertising);
2467 blobmsg_close_array(b, c);
2468
2469 c = blobmsg_open_array(b, "link-partner-advertising");
2470 system_add_link_modes(b, ecmd.lp_advertising);
2471 blobmsg_close_array(b, c);
2472
2473 c = blobmsg_open_array(b, "link-supported");
2474 system_add_link_modes(b, ecmd.supported);
2475 blobmsg_close_array(b, c);
2476
2477 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2478 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2479 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2480 blobmsg_add_string_buffer(b);
2481
2482 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2483 }
2484
2485 system_add_devtype(b, dev->ifname);
2486
2487 return 0;
2488 }
2489
2490 int
2491 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2492 {
2493 const char *const counters[] = {
2494 "collisions", "rx_frame_errors", "tx_compressed",
2495 "multicast", "rx_length_errors", "tx_dropped",
2496 "rx_bytes", "rx_missed_errors", "tx_errors",
2497 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2498 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2499 "rx_dropped", "tx_aborted_errors", "tx_packets",
2500 "rx_errors", "tx_bytes", "tx_window_errors",
2501 "rx_fifo_errors", "tx_carrier_errors",
2502 };
2503 int stats_dir;
2504 int i;
2505 uint64_t val = 0;
2506
2507 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2508 if (stats_dir < 0)
2509 return -1;
2510
2511 for (i = 0; i < ARRAY_SIZE(counters); i++)
2512 if (read_uint64_file(stats_dir, counters[i], &val))
2513 blobmsg_add_u64(b, counters[i], val);
2514
2515 close(stats_dir);
2516 return 0;
2517 }
2518
2519 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2520 {
2521 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2522 int alen = v4 ? 4 : 16;
2523 unsigned int flags = 0;
2524 struct ifaddrmsg ifa = {
2525 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2526 .ifa_prefixlen = addr->mask,
2527 .ifa_index = dev->ifindex,
2528 };
2529
2530 struct nl_msg *msg;
2531 if (cmd == RTM_NEWADDR)
2532 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2533
2534 msg = nlmsg_alloc_simple(cmd, flags);
2535 if (!msg)
2536 return -1;
2537
2538 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2539 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2540 if (v4) {
2541 if (addr->broadcast)
2542 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2543 if (addr->point_to_point)
2544 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2545 } else {
2546 time_t now = system_get_rtime();
2547 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2548
2549 if (addr->preferred_until) {
2550 int64_t preferred = addr->preferred_until - now;
2551 if (preferred < 0)
2552 preferred = 0;
2553 else if (preferred > UINT32_MAX)
2554 preferred = UINT32_MAX;
2555
2556 cinfo.ifa_prefered = preferred;
2557 }
2558
2559 if (addr->valid_until) {
2560 int64_t valid = addr->valid_until - now;
2561 if (valid <= 0) {
2562 nlmsg_free(msg);
2563 return -1;
2564 }
2565 else if (valid > UINT32_MAX)
2566 valid = UINT32_MAX;
2567
2568 cinfo.ifa_valid = valid;
2569 }
2570
2571 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2572
2573 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2574 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2575 }
2576
2577 return system_rtnl_call(msg);
2578 }
2579
2580 int system_add_address(struct device *dev, struct device_addr *addr)
2581 {
2582 return system_addr(dev, addr, RTM_NEWADDR);
2583 }
2584
2585 int system_del_address(struct device *dev, struct device_addr *addr)
2586 {
2587 return system_addr(dev, addr, RTM_DELADDR);
2588 }
2589
2590 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2591 {
2592 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2593 unsigned int flags = 0;
2594 struct ndmsg ndm = {
2595 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2596 .ndm_ifindex = dev->ifindex,
2597 .ndm_state = NUD_PERMANENT,
2598 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2599 };
2600 struct nl_msg *msg;
2601
2602 if (cmd == RTM_NEWNEIGH)
2603 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2604
2605 msg = nlmsg_alloc_simple(cmd, flags);
2606
2607 if (!msg)
2608 return -1;
2609
2610 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2611
2612 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2613 if (neighbor->flags & DEVNEIGH_MAC)
2614 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2615
2616
2617 return system_rtnl_call(msg);
2618 }
2619
2620 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2621 {
2622 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2623 }
2624
2625 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2626 {
2627 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2628 }
2629
2630 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2631 {
2632 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2633 bool have_gw;
2634 unsigned int flags = 0;
2635
2636 if (alen == 4)
2637 have_gw = !!route->nexthop.in.s_addr;
2638 else
2639 have_gw = route->nexthop.in6.s6_addr32[0] ||
2640 route->nexthop.in6.s6_addr32[1] ||
2641 route->nexthop.in6.s6_addr32[2] ||
2642 route->nexthop.in6.s6_addr32[3];
2643
2644 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2645 ? route->table : RT_TABLE_MAIN;
2646
2647 struct rtmsg rtm = {
2648 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2649 .rtm_dst_len = route->mask,
2650 .rtm_src_len = route->sourcemask,
2651 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2652 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2653 .rtm_scope = RT_SCOPE_NOWHERE,
2654 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2655 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2656 };
2657 struct nl_msg *msg;
2658
2659 if (cmd == RTM_NEWROUTE) {
2660 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2661
2662 if (!dev) { /* Add null-route */
2663 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2664 rtm.rtm_type = RTN_UNREACHABLE;
2665 }
2666 else
2667 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2668 }
2669
2670 if (route->flags & DEVROUTE_TYPE) {
2671 rtm.rtm_type = route->type;
2672 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2673 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2674 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2675 rtm.rtm_table = RT_TABLE_LOCAL;
2676 }
2677
2678 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2679 rtm.rtm_scope = RT_SCOPE_HOST;
2680 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2681 rtm.rtm_type == RTN_ANYCAST) {
2682 rtm.rtm_scope = RT_SCOPE_LINK;
2683 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2684 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2685 rtm.rtm_type == RTN_THROW) {
2686 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2687 dev = NULL;
2688 }
2689 }
2690
2691 msg = nlmsg_alloc_simple(cmd, flags);
2692 if (!msg)
2693 return -1;
2694
2695 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2696
2697 if (route->mask)
2698 nla_put(msg, RTA_DST, alen, &route->addr);
2699
2700 if (route->sourcemask) {
2701 if (rtm.rtm_family == AF_INET)
2702 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2703 else
2704 nla_put(msg, RTA_SRC, alen, &route->source);
2705 }
2706
2707 if (route->metric > 0)
2708 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2709
2710 if (have_gw)
2711 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2712
2713 if (dev)
2714 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2715
2716 if (table >= 256)
2717 nla_put_u32(msg, RTA_TABLE, table);
2718
2719 if (route->flags & DEVROUTE_MTU) {
2720 struct nlattr *metrics;
2721
2722 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2723 goto nla_put_failure;
2724
2725 nla_put_u32(msg, RTAX_MTU, route->mtu);
2726
2727 nla_nest_end(msg, metrics);
2728 }
2729
2730 return system_rtnl_call(msg);
2731
2732 nla_put_failure:
2733 nlmsg_free(msg);
2734 return -ENOMEM;
2735 }
2736
2737 int system_add_route(struct device *dev, struct device_route *route)
2738 {
2739 return system_rt(dev, route, RTM_NEWROUTE);
2740 }
2741
2742 int system_del_route(struct device *dev, struct device_route *route)
2743 {
2744 return system_rt(dev, route, RTM_DELROUTE);
2745 }
2746
2747 int system_flush_routes(void)
2748 {
2749 const char *names[] = { "ipv4", "ipv6" };
2750 int fd, i;
2751
2752 for (i = 0; i < ARRAY_SIZE(names); i++) {
2753 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
2754 fd = open(dev_buf, O_WRONLY);
2755 if (fd < 0)
2756 continue;
2757
2758 if (write(fd, "-1", 2)) {}
2759 close(fd);
2760 }
2761 return 0;
2762 }
2763
2764 bool system_resolve_rt_type(const char *type, unsigned int *id)
2765 {
2766 return system_rtn_aton(type, id);
2767 }
2768
2769 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2770 {
2771 FILE *f;
2772 char *e, buf[128];
2773 unsigned int n, proto = 256;
2774 n = strtoul(type, &e, 0);
2775 if (!*e && e != type)
2776 proto = n;
2777 else if (!strcmp(type, "unspec"))
2778 proto = RTPROT_UNSPEC;
2779 else if (!strcmp(type, "kernel"))
2780 proto = RTPROT_KERNEL;
2781 else if (!strcmp(type, "boot"))
2782 proto = RTPROT_BOOT;
2783 else if (!strcmp(type, "static"))
2784 proto = RTPROT_STATIC;
2785 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2786 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2787 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2788 continue;
2789
2790 n = strtoul(e, NULL, 10);
2791 e = strtok(NULL, " \t\n");
2792
2793 if (e && !strcmp(e, type)) {
2794 proto = n;
2795 break;
2796 }
2797 }
2798 fclose(f);
2799 }
2800
2801 if (proto > 255)
2802 return false;
2803
2804 *id = proto;
2805 return true;
2806 }
2807
2808 bool system_resolve_rt_table(const char *name, unsigned int *id)
2809 {
2810 FILE *f;
2811 char *e, buf[128];
2812 unsigned int n, table = RT_TABLE_UNSPEC;
2813
2814 /* first try to parse table as number */
2815 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2816 table = n;
2817
2818 /* handle well known aliases */
2819 else if (!strcmp(name, "default"))
2820 table = RT_TABLE_DEFAULT;
2821 else if (!strcmp(name, "main"))
2822 table = RT_TABLE_MAIN;
2823 else if (!strcmp(name, "local"))
2824 table = RT_TABLE_LOCAL;
2825
2826 /* try to look up name in /etc/iproute2/rt_tables */
2827 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2828 {
2829 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2830 {
2831 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2832 continue;
2833
2834 n = strtoul(e, NULL, 10);
2835 e = strtok(NULL, " \t\n");
2836
2837 if (e && !strcmp(e, name))
2838 {
2839 table = n;
2840 break;
2841 }
2842 }
2843
2844 fclose(f);
2845 }
2846
2847 if (table == RT_TABLE_UNSPEC)
2848 return false;
2849
2850 *id = table;
2851 return true;
2852 }
2853
2854 bool system_is_default_rt_table(unsigned int id)
2855 {
2856 return (id == RT_TABLE_MAIN);
2857 }
2858
2859 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2860 {
2861 char *e;
2862 unsigned int n;
2863
2864 if (!strcmp(filter, "strict"))
2865 n = 1;
2866 else if (!strcmp(filter, "loose"))
2867 n = 2;
2868 else {
2869 n = strtoul(filter, &e, 0);
2870 if (*e || e == filter || n > 2)
2871 return false;
2872 }
2873
2874 *id = n;
2875 return true;
2876 }
2877
2878 static int system_iprule(struct iprule *rule, int cmd)
2879 {
2880 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2881
2882 struct nl_msg *msg;
2883 struct rtmsg rtm = {
2884 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2885 .rtm_protocol = RTPROT_STATIC,
2886 .rtm_scope = RT_SCOPE_UNIVERSE,
2887 .rtm_table = RT_TABLE_UNSPEC,
2888 .rtm_type = RTN_UNSPEC,
2889 .rtm_flags = 0,
2890 };
2891
2892 if (cmd == RTM_NEWRULE)
2893 rtm.rtm_type = RTN_UNICAST;
2894
2895 if (rule->invert)
2896 rtm.rtm_flags |= FIB_RULE_INVERT;
2897
2898 if (rule->flags & IPRULE_SRC)
2899 rtm.rtm_src_len = rule->src_mask;
2900
2901 if (rule->flags & IPRULE_DEST)
2902 rtm.rtm_dst_len = rule->dest_mask;
2903
2904 if (rule->flags & IPRULE_TOS)
2905 rtm.rtm_tos = rule->tos;
2906
2907 if (rule->flags & IPRULE_LOOKUP) {
2908 if (rule->lookup < 256)
2909 rtm.rtm_table = rule->lookup;
2910 }
2911
2912 if (rule->flags & IPRULE_ACTION)
2913 rtm.rtm_type = rule->action;
2914 else if (rule->flags & IPRULE_GOTO)
2915 rtm.rtm_type = FR_ACT_GOTO;
2916 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2917 rtm.rtm_type = FR_ACT_NOP;
2918
2919 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2920
2921 if (!msg)
2922 return -1;
2923
2924 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2925
2926 if (rule->flags & IPRULE_IN)
2927 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2928
2929 if (rule->flags & IPRULE_OUT)
2930 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2931
2932 if (rule->flags & IPRULE_SRC)
2933 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2934
2935 if (rule->flags & IPRULE_DEST)
2936 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2937
2938 if (rule->flags & IPRULE_PRIORITY)
2939 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2940 else if (cmd == RTM_NEWRULE)
2941 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2942
2943 if (rule->flags & IPRULE_FWMARK)
2944 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2945
2946 if (rule->flags & IPRULE_FWMASK)
2947 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2948
2949 if (rule->flags & IPRULE_LOOKUP) {
2950 if (rule->lookup >= 256)
2951 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2952 }
2953
2954 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2955 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2956
2957 if (rule->flags & IPRULE_UIDRANGE) {
2958 struct fib_rule_uid_range uidrange = {
2959 .start = rule->uidrange_start,
2960 .end = rule->uidrange_end
2961 };
2962
2963 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
2964 }
2965
2966 if (rule->flags & IPRULE_GOTO)
2967 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2968
2969 return system_rtnl_call(msg);
2970 }
2971
2972 int system_add_iprule(struct iprule *rule)
2973 {
2974 return system_iprule(rule, RTM_NEWRULE);
2975 }
2976
2977 int system_del_iprule(struct iprule *rule)
2978 {
2979 return system_iprule(rule, RTM_DELRULE);
2980 }
2981
2982 int system_flush_iprules(void)
2983 {
2984 int rv = 0;
2985 struct iprule rule;
2986
2987 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2988 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2989
2990 memset(&rule, 0, sizeof(rule));
2991
2992
2993 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2994
2995 rule.priority = 0;
2996 rule.lookup = RT_TABLE_LOCAL;
2997 rv |= system_iprule(&rule, RTM_NEWRULE);
2998
2999 rule.priority = 32766;
3000 rule.lookup = RT_TABLE_MAIN;
3001 rv |= system_iprule(&rule, RTM_NEWRULE);
3002
3003 rule.priority = 32767;
3004 rule.lookup = RT_TABLE_DEFAULT;
3005 rv |= system_iprule(&rule, RTM_NEWRULE);
3006
3007
3008 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3009
3010 rule.priority = 0;
3011 rule.lookup = RT_TABLE_LOCAL;
3012 rv |= system_iprule(&rule, RTM_NEWRULE);
3013
3014 rule.priority = 32766;
3015 rule.lookup = RT_TABLE_MAIN;
3016 rv |= system_iprule(&rule, RTM_NEWRULE);
3017
3018 return rv;
3019 }
3020
3021 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3022 {
3023 return system_rtn_aton(action, id);
3024 }
3025
3026 time_t system_get_rtime(void)
3027 {
3028 struct timespec ts;
3029 struct timeval tv;
3030
3031 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3032 return ts.tv_sec;
3033
3034 if (gettimeofday(&tv, NULL) == 0)
3035 return tv.tv_sec;
3036
3037 return 0;
3038 }
3039
3040 #ifndef IP_DF
3041 #define IP_DF 0x4000
3042 #endif
3043
3044 static int tunnel_ioctl(const char *name, int cmd, void *p)
3045 {
3046 struct ifreq ifr;
3047
3048 memset(&ifr, 0, sizeof(ifr));
3049 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3050 ifr.ifr_ifru.ifru_data = p;
3051 return ioctl(sock_ioctl, cmd, &ifr);
3052 }
3053
3054 #ifdef IFLA_IPTUN_MAX
3055 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3056 struct blob_attr **tb)
3057 {
3058 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3059 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3060 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3061 struct blob_attr *cur;
3062 int ret = 0, ttl = 0;
3063
3064 if (!nlm)
3065 return -1;
3066
3067 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3068 nla_put_string(nlm, IFLA_IFNAME, name);
3069
3070 if (link)
3071 nla_put_u32(nlm, IFLA_LINK, link);
3072
3073 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3074 if (!linkinfo) {
3075 ret = -ENOMEM;
3076 goto failure;
3077 }
3078
3079 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3080 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3081 if (!infodata) {
3082 ret = -ENOMEM;
3083 goto failure;
3084 }
3085
3086 if (link)
3087 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3088
3089 if ((cur = tb[TUNNEL_ATTR_TTL]))
3090 ttl = blobmsg_get_u32(cur);
3091
3092 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3093 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3094
3095 struct in6_addr in6buf;
3096 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3097 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3098 ret = -EINVAL;
3099 goto failure;
3100 }
3101 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3102 }
3103
3104 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3105 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3106 ret = -EINVAL;
3107 goto failure;
3108 }
3109 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3110 }
3111
3112 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3113 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3114 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3115
3116 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3117 blobmsg_data(cur), blobmsg_len(cur));
3118
3119 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3120 char *str = blobmsg_get_string(cur);
3121
3122 if (strcmp(str, "ignore")) {
3123 char *e;
3124 unsigned encap_limit = strtoul(str, &e, 0);
3125
3126 if (e == str || *e || encap_limit > 255) {
3127 ret = -EINVAL;
3128 goto failure;
3129 }
3130
3131 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3132 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3133 }
3134 }
3135
3136 #ifdef IFLA_IPTUN_FMR_MAX
3137 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3138 struct blob_attr *rcur;
3139 unsigned rrem, fmrcnt = 0;
3140 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3141
3142 if (!fmrs) {
3143 ret = -ENOMEM;
3144 goto failure;
3145 }
3146
3147 blobmsg_for_each_attr(rcur, cur, rrem) {
3148 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3149 struct in6_addr ip6prefix;
3150 struct in_addr ip4prefix;
3151 unsigned ip4len, ip6len, ealen, offset;
3152
3153 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3154 blobmsg_data(rcur), blobmsg_len(rcur));
3155
3156 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3157 !parse_ip_and_netmask(AF_INET6,
3158 blobmsg_data(tb_cur), &ip6prefix,
3159 &ip6len)) {
3160 ret = -EINVAL;
3161 goto failure;
3162 }
3163
3164 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3165 !parse_ip_and_netmask(AF_INET,
3166 blobmsg_data(tb_cur), &ip4prefix,
3167 &ip4len)) {
3168 ret = -EINVAL;
3169 goto failure;
3170 }
3171
3172 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3173 ret = -EINVAL;
3174 goto failure;
3175 }
3176 ealen = blobmsg_get_u32(tb_cur);
3177
3178 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3179 ret = -EINVAL;
3180 goto failure;
3181 }
3182 offset = blobmsg_get_u32(tb_cur);
3183
3184 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3185 if (!rule) {
3186 ret = -ENOMEM;
3187 goto failure;
3188 }
3189
3190 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3191 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3192 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3193 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3194 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3195 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3196
3197 nla_nest_end(nlm, rule);
3198 }
3199
3200 nla_nest_end(nlm, fmrs);
3201 }
3202 #endif
3203 if (tun_flags)
3204 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3205 }
3206
3207 nla_nest_end(nlm, infodata);
3208 nla_nest_end(nlm, linkinfo);
3209
3210 return system_rtnl_call(nlm);
3211
3212 failure:
3213 nlmsg_free(nlm);
3214 return ret;
3215 }
3216 #endif
3217
3218 #ifdef IFLA_IPTUN_MAX
3219 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3220 static int system_add_gre_tunnel(const char *name, const char *kind,
3221 const unsigned int link, struct blob_attr **tb, bool v6)
3222 {
3223 struct nl_msg *nlm;
3224 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3225 struct blob_attr *cur;
3226 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3227 uint16_t iflags = 0, oflags = 0;
3228 uint8_t tos = 0;
3229 int ret = 0, ttl = 0;
3230 unsigned encap_limit = 0;
3231
3232 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3233 if (!nlm)
3234 return -1;
3235
3236 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3237 nla_put_string(nlm, IFLA_IFNAME, name);
3238
3239 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3240 if (!linkinfo) {
3241 ret = -ENOMEM;
3242 goto failure;
3243 }
3244
3245 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3246 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3247 if (!infodata) {
3248 ret = -ENOMEM;
3249 goto failure;
3250 }
3251
3252 if (link)
3253 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3254
3255 if ((cur = tb[TUNNEL_ATTR_TTL]))
3256 ttl = blobmsg_get_u32(cur);
3257
3258 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3259 char *str = blobmsg_get_string(cur);
3260 if (strcmp(str, "inherit")) {
3261 unsigned uval;
3262
3263 if (!system_tos_aton(str, &uval)) {
3264 ret = -EINVAL;
3265 goto failure;
3266 }
3267
3268 if (v6)
3269 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3270 else
3271 tos = uval;
3272 } else {
3273 if (v6)
3274 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3275 else
3276 tos = 1;
3277 }
3278 }
3279
3280 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3281 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3282
3283 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3284 blobmsg_data(cur), blobmsg_len(cur));
3285
3286 if ((cur = tb_data[GRE_DATA_IKEY])) {
3287 if ((ikey = blobmsg_get_u32(cur)))
3288 iflags |= GRE_KEY;
3289 }
3290
3291 if ((cur = tb_data[GRE_DATA_OKEY])) {
3292 if ((okey = blobmsg_get_u32(cur)))
3293 oflags |= GRE_KEY;
3294 }
3295
3296 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3297 if (blobmsg_get_bool(cur))
3298 iflags |= GRE_CSUM;
3299 }
3300
3301 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3302 if (blobmsg_get_bool(cur))
3303 oflags |= GRE_CSUM;
3304 }
3305
3306 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3307 if (blobmsg_get_bool(cur))
3308 iflags |= GRE_SEQ;
3309 }
3310
3311 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3312 if (blobmsg_get_bool(cur))
3313 oflags |= GRE_SEQ;
3314 }
3315
3316 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3317 char *str = blobmsg_get_string(cur);
3318
3319 if (strcmp(str, "ignore")) {
3320 char *e;
3321
3322 encap_limit = strtoul(str, &e, 0);
3323
3324 if (e == str || *e || encap_limit > 255) {
3325 ret = -EINVAL;
3326 goto failure;
3327 }
3328
3329 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3330 }
3331 }
3332 }
3333
3334 if (v6) {
3335 struct in6_addr in6buf;
3336 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3337 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3338 ret = -EINVAL;
3339 goto failure;
3340 }
3341 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3342 }
3343
3344 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3345 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3346 ret = -EINVAL;
3347 goto failure;
3348 }
3349 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3350 }
3351
3352 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3353 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3354
3355 if (flowinfo)
3356 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3357
3358 if (flags6)
3359 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3360
3361 if (!ttl)
3362 ttl = 64;
3363 } else {
3364 struct in_addr inbuf;
3365 bool set_df = true;
3366
3367 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3368 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3369 ret = -EINVAL;
3370 goto failure;
3371 }
3372 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3373 }
3374
3375 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3376 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3377 ret = -EINVAL;
3378 goto failure;
3379 }
3380 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3381
3382 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3383 if (!okey) {
3384 okey = inbuf.s_addr;
3385 oflags |= GRE_KEY;
3386 }
3387
3388 if (!ikey) {
3389 ikey = inbuf.s_addr;
3390 iflags |= GRE_KEY;
3391 }
3392 }
3393 }
3394
3395 if ((cur = tb[TUNNEL_ATTR_DF]))
3396 set_df = blobmsg_get_bool(cur);
3397
3398 if (!set_df) {
3399 /* ttl != 0 and nopmtudisc are incompatible */
3400 if (ttl) {
3401 ret = -EINVAL;
3402 goto failure;
3403 }
3404 } else if (!ttl)
3405 ttl = 64;
3406
3407 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3408
3409 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3410 }
3411
3412 if (ttl)
3413 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3414
3415 if (oflags)
3416 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3417
3418 if (iflags)
3419 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3420
3421 if (okey)
3422 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3423
3424 if (ikey)
3425 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3426
3427 nla_nest_end(nlm, infodata);
3428 nla_nest_end(nlm, linkinfo);
3429
3430 return system_rtnl_call(nlm);
3431
3432 failure:
3433 nlmsg_free(nlm);
3434 return ret;
3435 }
3436 #endif
3437
3438 #ifdef IFLA_VTI_MAX
3439 static int system_add_vti_tunnel(const char *name, const char *kind,
3440 const unsigned int link, struct blob_attr **tb, bool v6)
3441 {
3442 struct nl_msg *nlm;
3443 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3444 struct blob_attr *cur;
3445 int ret = 0;
3446
3447 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3448 if (!nlm)
3449 return -1;
3450
3451 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3452 nla_put_string(nlm, IFLA_IFNAME, name);
3453
3454 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3455 if (!linkinfo) {
3456 ret = -ENOMEM;
3457 goto failure;
3458 }
3459
3460 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3461 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3462 if (!infodata) {
3463 ret = -ENOMEM;
3464 goto failure;
3465 }
3466
3467 if (link)
3468 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3469
3470 if (v6) {
3471 struct in6_addr in6buf;
3472 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3473 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3474 ret = -EINVAL;
3475 goto failure;
3476 }
3477 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3478 }
3479
3480 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3481 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3482 ret = -EINVAL;
3483 goto failure;
3484 }
3485 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3486 }
3487
3488 } else {
3489 struct in_addr inbuf;
3490
3491 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3492 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3493 ret = -EINVAL;
3494 goto failure;
3495 }
3496 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3497 }
3498
3499 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3500 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3501 ret = -EINVAL;
3502 goto failure;
3503 }
3504 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3505 }
3506
3507 }
3508
3509 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3510 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3511 uint32_t ikey = 0, okey = 0;
3512
3513 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3514 blobmsg_data(cur), blobmsg_len(cur));
3515
3516 if ((cur = tb_data[VTI_DATA_IKEY])) {
3517 if ((ikey = blobmsg_get_u32(cur)))
3518 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3519 }
3520
3521 if ((cur = tb_data[VTI_DATA_OKEY])) {
3522 if ((okey = blobmsg_get_u32(cur)))
3523 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3524 }
3525 }
3526
3527 nla_nest_end(nlm, infodata);
3528 nla_nest_end(nlm, linkinfo);
3529
3530 return system_rtnl_call(nlm);
3531
3532 failure:
3533 nlmsg_free(nlm);
3534 return ret;
3535 }
3536 #endif
3537
3538 #ifdef IFLA_XFRM_MAX
3539 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3540 const unsigned int link, struct blob_attr **tb)
3541 {
3542 struct nl_msg *nlm;
3543 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3544 struct blob_attr *cur;
3545 int ret = 0;
3546
3547 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3548 if (!nlm)
3549 return -1;
3550
3551 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3552 nla_put_string(nlm, IFLA_IFNAME, name);
3553
3554 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3555 if (!linkinfo) {
3556 ret = -ENOMEM;
3557 goto failure;
3558 }
3559
3560 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3561 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3562 if (!infodata) {
3563 ret = -ENOMEM;
3564 goto failure;
3565 }
3566
3567 if (link)
3568 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3569
3570 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3571 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3572 uint32_t if_id = 0;
3573
3574 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3575 blobmsg_data(cur), blobmsg_len(cur));
3576
3577 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3578 if ((if_id = blobmsg_get_u32(cur)))
3579 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3580 }
3581
3582 }
3583
3584 nla_nest_end(nlm, infodata);
3585 nla_nest_end(nlm, linkinfo);
3586
3587 return system_rtnl_call(nlm);
3588
3589 failure:
3590 nlmsg_free(nlm);
3591 return ret;
3592 }
3593 #endif
3594
3595 #ifdef IFLA_VXLAN_MAX
3596 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3597 struct blob_attr *cur;
3598 if ((cur = tb_data[vxlandatatype])) {
3599 bool val = blobmsg_get_bool(cur);
3600 if (invert)
3601 val = !val;
3602
3603 if ((attrtype == IFLA_VXLAN_GBP) && val)
3604 nla_put_flag(msg, attrtype);
3605 else
3606 nla_put_u8(msg, attrtype, val);
3607
3608 }
3609 }
3610
3611 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3612 {
3613 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3614 struct nl_msg *msg;
3615 struct nlattr *linkinfo, *data;
3616 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3617 struct blob_attr *cur;
3618 int ret = 0;
3619
3620 if ((cur = tb[TUNNEL_ATTR_DATA]))
3621 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3622 blobmsg_data(cur), blobmsg_len(cur));
3623 else
3624 return -EINVAL;
3625
3626 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3627
3628 if (!msg)
3629 return -1;
3630
3631 nlmsg_append(msg, &iim, sizeof(iim), 0);
3632
3633 nla_put_string(msg, IFLA_IFNAME, name);
3634
3635 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3636 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3637 if (!ea) {
3638 ret = -EINVAL;
3639 goto failure;
3640 }
3641
3642 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3643 }
3644
3645 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3646 uint32_t mtu = blobmsg_get_u32(cur);
3647 nla_put_u32(msg, IFLA_MTU, mtu);
3648 }
3649
3650 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3651 ret = -ENOMEM;
3652 goto failure;
3653 }
3654
3655 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3656
3657 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3658 ret = -ENOMEM;
3659 goto failure;
3660 }
3661
3662 if (link)
3663 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3664
3665 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3666 uint32_t id = blobmsg_get_u32(cur);
3667 if (id >= (1u << 24) - 1) {
3668 ret = -EINVAL;
3669 goto failure;
3670 }
3671
3672 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3673 }
3674
3675 if (v6) {
3676 struct in6_addr in6buf;
3677 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3678 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3679 ret = -EINVAL;
3680 goto failure;
3681 }
3682 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3683 }
3684
3685 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3686 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3687 ret = -EINVAL;
3688 goto failure;
3689 }
3690 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3691 }
3692 } else {
3693 struct in_addr inbuf;
3694
3695 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3696 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3697 ret = -EINVAL;
3698 goto failure;
3699 }
3700 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3701 }
3702
3703 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3704 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3705 ret = -EINVAL;
3706 goto failure;
3707 }
3708 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3709 }
3710 }
3711
3712 uint32_t port = 4789;
3713 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3714 port = blobmsg_get_u32(cur);
3715 if (port < 1 || port > 65535) {
3716 ret = -EINVAL;
3717 goto failure;
3718 }
3719 }
3720 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3721
3722 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3723 struct ifla_vxlan_port_range srcports = {0,0};
3724
3725 uint32_t low = blobmsg_get_u32(cur);
3726 if (low < 1 || low > 65535 - 1) {
3727 ret = -EINVAL;
3728 goto failure;
3729 }
3730
3731 srcports.low = htons((uint16_t) low);
3732 srcports.high = htons((uint16_t) (low+1));
3733
3734 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3735 uint32_t high = blobmsg_get_u32(cur);
3736 if (high < 1 || high > 65535) {
3737 ret = -EINVAL;
3738 goto failure;
3739 }
3740
3741 if (high > low)
3742 srcports.high = htons((uint16_t) high);
3743 }
3744
3745 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3746 }
3747
3748 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3749 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3750 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3751 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3752 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3753 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3754 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3755 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3756 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3757
3758 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3759 uint32_t ageing = blobmsg_get_u32(cur);
3760 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3761 }
3762
3763 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3764 uint32_t maxaddress = blobmsg_get_u32(cur);
3765 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3766 }
3767
3768 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3769 char *str = blobmsg_get_string(cur);
3770 unsigned tos = 1;
3771
3772 if (strcmp(str, "inherit")) {
3773 if (!system_tos_aton(str, &tos)) {
3774 ret = -EINVAL;
3775 goto failure;
3776 }
3777 }
3778
3779 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3780 }
3781
3782 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3783 uint32_t ttl = blobmsg_get_u32(cur);
3784 if (ttl < 1 || ttl > 255) {
3785 ret = -EINVAL;
3786 goto failure;
3787 }
3788
3789 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3790 }
3791
3792 nla_nest_end(msg, data);
3793 nla_nest_end(msg, linkinfo);
3794
3795 ret = system_rtnl_call(msg);
3796 if (ret)
3797 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3798
3799 return ret;
3800
3801 failure:
3802 nlmsg_free(msg);
3803 return ret;
3804 }
3805 #endif
3806
3807 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3808 {
3809 struct blob_attr *cur;
3810 int ret = 0;
3811
3812 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3813 return -1;
3814
3815 #ifdef SIOCADD6RD
3816 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3817 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3818 unsigned int mask;
3819 struct ip_tunnel_6rd p6;
3820
3821 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3822 blobmsg_data(cur), blobmsg_len(cur));
3823
3824 memset(&p6, 0, sizeof(p6));
3825
3826 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3827 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3828 &p6.prefix, &mask) || mask > 128) {
3829 ret = -EINVAL;
3830 goto failure;
3831 }
3832
3833 p6.prefixlen = mask;
3834 }
3835
3836 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3837 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3838 &p6.relay_prefix, &mask) || mask > 32) {
3839 ret = -EINVAL;
3840 goto failure;
3841 }
3842
3843 p6.relay_prefixlen = mask;
3844 }
3845
3846 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3847 ret = -1;
3848 goto failure;
3849 }
3850 }
3851 #endif
3852
3853 return ret;
3854
3855 failure:
3856 system_link_del(name);
3857 return ret;
3858 }
3859
3860 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3861 {
3862 struct blob_attr *cur;
3863 bool set_df = true;
3864 struct ip_tunnel_parm p = {
3865 .link = link,
3866 .iph = {
3867 .version = 4,
3868 .ihl = 5,
3869 .protocol = proto,
3870 }
3871 };
3872
3873 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3874 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3875 return -EINVAL;
3876
3877 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3878 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3879 return -EINVAL;
3880
3881 if ((cur = tb[TUNNEL_ATTR_DF]))
3882 set_df = blobmsg_get_bool(cur);
3883
3884 if ((cur = tb[TUNNEL_ATTR_TTL]))
3885 p.iph.ttl = blobmsg_get_u32(cur);
3886
3887 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3888 char *str = blobmsg_get_string(cur);
3889 if (strcmp(str, "inherit")) {
3890 unsigned uval;
3891
3892 if (!system_tos_aton(str, &uval))
3893 return -EINVAL;
3894
3895 p.iph.tos = uval;
3896 } else
3897 p.iph.tos = 1;
3898 }
3899
3900 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3901 /* ttl !=0 and nopmtudisc are incompatible */
3902 if (p.iph.ttl && p.iph.frag_off == 0)
3903 return -EINVAL;
3904
3905 strncpy(p.name, name, sizeof(p.name) - 1);
3906
3907 switch (p.iph.protocol) {
3908 case IPPROTO_IPIP:
3909 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3910 case IPPROTO_IPV6:
3911 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3912 default:
3913 break;
3914 }
3915 return -1;
3916 }
3917
3918 int system_del_ip_tunnel(const struct device *dev)
3919 {
3920 return system_link_del(dev->ifname);
3921 }
3922
3923 int system_update_ipv6_mtu(struct device *dev, int mtu)
3924 {
3925 int ret = -1;
3926 char buf[64];
3927 int fd;
3928
3929 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
3930 if (fd < 0)
3931 return ret;
3932
3933 if (!mtu) {
3934 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3935 if (len < 0)
3936 goto out;
3937
3938 buf[len] = 0;
3939 ret = atoi(buf);
3940 } else {
3941 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3942 ret = mtu;
3943 }
3944
3945 out:
3946 close(fd);
3947 return ret;
3948 }
3949
3950 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
3951 {
3952 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3953 struct blob_attr *cur;
3954 const char *str;
3955
3956 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3957 blob_data(attr), blob_len(attr));
3958
3959 system_link_del(dev->ifname);
3960
3961 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3962 return -EINVAL;
3963 str = blobmsg_data(cur);
3964
3965 unsigned int ttl = 0;
3966 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3967 ttl = blobmsg_get_u32(cur);
3968 if (ttl > 255)
3969 return -EINVAL;
3970 }
3971
3972 unsigned int link = 0;
3973 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3974 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3975 if (!iface)
3976 return -EINVAL;
3977
3978 if (iface->l3_dev.dev)
3979 link = iface->l3_dev.dev->ifindex;
3980 }
3981
3982 if (!strcmp(str, "sit"))
3983 return system_add_sit_tunnel(dev->ifname, link, tb);
3984 #ifdef IFLA_IPTUN_MAX
3985 else if (!strcmp(str, "ipip6")) {
3986 return system_add_ip6_tunnel(dev->ifname, link, tb);
3987 } else if (!strcmp(str, "greip")) {
3988 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
3989 } else if (!strcmp(str, "gretapip")) {
3990 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
3991 } else if (!strcmp(str, "greip6")) {
3992 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
3993 } else if (!strcmp(str, "gretapip6")) {
3994 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
3995 #ifdef IFLA_VTI_MAX
3996 } else if (!strcmp(str, "vtiip")) {
3997 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
3998 } else if (!strcmp(str, "vtiip6")) {
3999 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4000 #endif
4001 #ifdef IFLA_XFRM_MAX
4002 } else if (!strcmp(str, "xfrm")) {
4003 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4004 #endif
4005 #ifdef IFLA_VXLAN_MAX
4006 } else if(!strcmp(str, "vxlan")) {
4007 return system_add_vxlan(dev->ifname, link, tb, false);
4008 } else if(!strcmp(str, "vxlan6")) {
4009 return system_add_vxlan(dev->ifname, link, tb, true);
4010 #endif
4011 #endif
4012 } else if (!strcmp(str, "ipip")) {
4013 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4014 }
4015 else
4016 return -EINVAL;
4017
4018 return 0;
4019 }
OpenWrt Network interface configuration daemon