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