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