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device: add support for configuring device link speed/duplex
[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 static void
1582 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1583 {
1584 struct ethtool_cmd ecmd = {
1585 .cmd = ETHTOOL_GSET,
1586 };
1587 struct ifreq ifr = {
1588 .ifr_data = (caddr_t)&ecmd,
1589 };
1590 static const struct {
1591 int speed;
1592 uint8_t bit_half;
1593 uint8_t bit_full;
1594 } speed_mask[] = {
1595 { 10, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT },
1596 { 100, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT },
1597 { 1000, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT },
1598 };
1599 uint32_t adv;
1600 int i;
1601
1602 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1603
1604 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
1605 return;
1606
1607 adv = ecmd.supported;
1608 for (i = 0; i < ARRAY_SIZE(speed_mask); i++) {
1609 if (s->flags & DEV_OPT_DUPLEX) {
1610 int bit = s->duplex ? speed_mask[i].bit_half : speed_mask[i].bit_full;
1611 adv &= ~(1 << bit);
1612 }
1613
1614 if (!(s->flags & DEV_OPT_SPEED) ||
1615 s->speed == speed_mask[i].speed)
1616 continue;
1617
1618 adv &= ~(1 << speed_mask[i].bit_full);
1619 adv &= ~(1 << speed_mask[i].bit_half);
1620 }
1621
1622
1623 if (ecmd.autoneg && ecmd.advertising == adv)
1624 return;
1625
1626 ecmd.autoneg = 1;
1627 ecmd.advertising = adv;
1628 ecmd.cmd = ETHTOOL_SSET;
1629 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1630 }
1631
1632 void
1633 system_if_get_settings(struct device *dev, struct device_settings *s)
1634 {
1635 struct ifreq ifr;
1636 char buf[10];
1637
1638 memset(&ifr, 0, sizeof(ifr));
1639 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1640
1641 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1642 s->mtu = ifr.ifr_mtu;
1643 s->flags |= DEV_OPT_MTU;
1644 }
1645
1646 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1647 if (s->mtu6 > 0)
1648 s->flags |= DEV_OPT_MTU6;
1649
1650 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1651 s->txqueuelen = ifr.ifr_qlen;
1652 s->flags |= DEV_OPT_TXQUEUELEN;
1653 }
1654
1655 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1656 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1657 s->flags |= DEV_OPT_MACADDR;
1658 }
1659
1660 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1661 s->ipv6 = !strtoul(buf, NULL, 0);
1662 s->flags |= DEV_OPT_IPV6;
1663 }
1664
1665 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1666 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1667 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1668 }
1669
1670 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1671 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1672 s->flags |= DEV_OPT_PROMISC;
1673
1674 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1675 s->flags |= DEV_OPT_MULTICAST;
1676 }
1677
1678 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1679 s->rpfilter = strtoul(buf, NULL, 0);
1680 s->flags |= DEV_OPT_RPFILTER;
1681 }
1682
1683 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1684 s->acceptlocal = strtoul(buf, NULL, 0);
1685 s->flags |= DEV_OPT_ACCEPTLOCAL;
1686 }
1687
1688 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1689 s->igmpversion = strtoul(buf, NULL, 0);
1690 s->flags |= DEV_OPT_IGMPVERSION;
1691 }
1692
1693 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1694 s->mldversion = strtoul(buf, NULL, 0);
1695 s->flags |= DEV_OPT_MLDVERSION;
1696 }
1697
1698 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1699 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1700 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1701 }
1702
1703 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1704 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1705 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1706 }
1707
1708 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1709 s->neigh4locktime = strtol(buf, NULL, 0);
1710 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1711 }
1712
1713 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1714 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1715 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1716 }
1717
1718 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1719 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1720 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1721 }
1722
1723 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1724 s->dadtransmits = strtoul(buf, NULL, 0);
1725 s->flags |= DEV_OPT_DADTRANSMITS;
1726 }
1727
1728 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1729 s->sendredirects = strtoul(buf, NULL, 0);
1730 s->flags |= DEV_OPT_SENDREDIRECTS;
1731 }
1732
1733 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1734 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1735 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1736 }
1737
1738 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1739 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1740 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1741 }
1742
1743 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1744 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1745 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1746 }
1747
1748 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1749 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1750 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1751 }
1752
1753 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1754 s->arp_accept = strtoul(buf, NULL, 0);
1755 s->flags |= DEV_OPT_ARP_ACCEPT;
1756 }
1757 }
1758
1759 void
1760 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1761 {
1762 struct ifreq ifr;
1763 char buf[12];
1764
1765 apply_mask &= s->flags;
1766
1767 memset(&ifr, 0, sizeof(ifr));
1768 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1769 if (apply_mask & DEV_OPT_MTU) {
1770 ifr.ifr_mtu = s->mtu;
1771 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1772 s->flags &= ~DEV_OPT_MTU;
1773 }
1774 if (apply_mask & DEV_OPT_MTU6) {
1775 system_update_ipv6_mtu(dev, s->mtu6);
1776 }
1777 if (apply_mask & DEV_OPT_TXQUEUELEN) {
1778 ifr.ifr_qlen = s->txqueuelen;
1779 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1780 s->flags &= ~DEV_OPT_TXQUEUELEN;
1781 }
1782 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
1783 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1784 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1785 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1786 s->flags &= ~DEV_OPT_MACADDR;
1787 }
1788 if (apply_mask & DEV_OPT_IPV6)
1789 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1790 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
1791 struct device dummy = {
1792 .ifname = "all",
1793 };
1794 bool ip6segmentrouting = device_check_ip6segmentrouting();
1795
1796 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
1797 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
1798 }
1799 if (apply_mask & DEV_OPT_PROMISC) {
1800 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1801 !s->promisc ? IFF_PROMISC : 0) < 0)
1802 s->flags &= ~DEV_OPT_PROMISC;
1803 }
1804 if (apply_mask & DEV_OPT_RPFILTER) {
1805 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1806 system_set_rpfilter(dev, buf);
1807 }
1808 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
1809 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1810 if (apply_mask & DEV_OPT_IGMPVERSION) {
1811 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1812 system_set_igmpversion(dev, buf);
1813 }
1814 if (apply_mask & DEV_OPT_MLDVERSION) {
1815 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1816 system_set_mldversion(dev, buf);
1817 }
1818 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
1819 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1820 system_set_neigh4reachabletime(dev, buf);
1821 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1822 system_set_neigh6reachabletime(dev, buf);
1823 }
1824 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
1825 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1826 system_set_neigh4locktime(dev, buf);
1827 }
1828 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
1829 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1830 system_set_neigh4gcstaletime(dev, buf);
1831 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1832 system_set_neigh6gcstaletime(dev, buf);
1833 }
1834 if (apply_mask & DEV_OPT_DADTRANSMITS) {
1835 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1836 system_set_dadtransmits(dev, buf);
1837 }
1838 if (apply_mask & DEV_OPT_MULTICAST) {
1839 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1840 !s->multicast ? IFF_MULTICAST : 0) < 0)
1841 s->flags &= ~DEV_OPT_MULTICAST;
1842 }
1843 if (apply_mask & DEV_OPT_SENDREDIRECTS)
1844 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1845 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1846 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
1847 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1848 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
1849 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
1850 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
1851 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
1852 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
1853 if (apply_mask & DEV_OPT_ARP_ACCEPT)
1854 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
1855 system_set_ethtool_settings(dev, s);
1856 }
1857
1858 int system_if_up(struct device *dev)
1859 {
1860 return system_if_flags(dev->ifname, IFF_UP, 0);
1861 }
1862
1863 int system_if_down(struct device *dev)
1864 {
1865 return system_if_flags(dev->ifname, 0, IFF_UP);
1866 }
1867
1868 struct if_check_data {
1869 struct device *dev;
1870 int pending;
1871 int ret;
1872 };
1873
1874 #ifndef IFF_LOWER_UP
1875 #define IFF_LOWER_UP 0x10000
1876 #endif
1877
1878 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1879 {
1880 struct nlmsghdr *nh = nlmsg_hdr(msg);
1881 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1882 struct if_check_data *chk = (struct if_check_data *)arg;
1883
1884 if (nh->nlmsg_type != RTM_NEWLINK)
1885 return NL_SKIP;
1886
1887 if (chk->dev->type == &simple_device_type)
1888 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1889 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1890
1891 return NL_OK;
1892 }
1893
1894 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1895 {
1896 struct if_check_data *chk = (struct if_check_data *)arg;
1897 chk->pending = 0;
1898 return NL_STOP;
1899 }
1900
1901 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1902 {
1903 struct if_check_data *chk = (struct if_check_data *)arg;
1904
1905 if (chk->dev->type == &simple_device_type)
1906 device_set_present(chk->dev, false);
1907 device_set_link(chk->dev, false);
1908 chk->pending = err->error;
1909
1910 return NL_STOP;
1911 }
1912
1913 struct bridge_vlan_check_data {
1914 struct device *check_dev;
1915 int ifindex;
1916 int ret;
1917 bool pending;
1918 };
1919
1920 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
1921 struct bridge_vlan_port *port,
1922 struct bridge_vlan_info *vinfo)
1923 {
1924 uint16_t flags = 0, diff, mask;
1925
1926 if (port->flags & BRVLAN_F_PVID)
1927 flags |= BRIDGE_VLAN_INFO_PVID;
1928 if (port->flags & BRVLAN_F_UNTAGGED)
1929 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1930
1931 diff = vinfo->flags ^ flags;
1932 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
1933 if (diff & mask) {
1934 data->ret = 1;
1935 data->pending = false;
1936 }
1937
1938 port->check = 1;
1939 }
1940
1941 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
1942 struct rtattr *attr)
1943 {
1944 struct bridge_vlan_hotplug_port *port;
1945 struct bridge_vlan_info *vinfo;
1946 struct bridge_vlan *vlan;
1947 struct rtattr *cur;
1948 int rem = RTA_PAYLOAD(attr);
1949 int i;
1950
1951 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1952 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
1953 continue;
1954
1955 vinfo = RTA_DATA(cur);
1956 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
1957 if (!vlan) {
1958 data->ret = 1;
1959 data->pending = false;
1960 return;
1961 }
1962
1963 for (i = 0; i < vlan->n_ports; i++)
1964 if (!vlan->ports[i].check)
1965 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
1966
1967 list_for_each_entry(port, &vlan->hotplug_ports, list)
1968 if (!port->port.check)
1969 bridge_vlan_check_port(data, &port->port, vinfo);
1970 }
1971 }
1972
1973 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
1974 {
1975 struct bridge_vlan_check_data *data = arg;
1976 struct nlmsghdr *nh = nlmsg_hdr(msg);
1977 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1978 struct rtattr *attr;
1979 int rem;
1980
1981 if (nh->nlmsg_type != RTM_NEWLINK)
1982 return NL_SKIP;
1983
1984 if (ifi->ifi_family != AF_BRIDGE)
1985 return NL_SKIP;
1986
1987 if (ifi->ifi_index != data->ifindex)
1988 return NL_SKIP;
1989
1990 attr = IFLA_RTA(ifi);
1991 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
1992 while (RTA_OK(attr, rem)) {
1993 if (attr->rta_type == IFLA_AF_SPEC)
1994 bridge_vlan_check_attr(data, attr);
1995
1996 attr = RTA_NEXT(attr, rem);
1997 }
1998
1999 return NL_SKIP;
2000 }
2001
2002 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2003 {
2004 struct bridge_vlan_check_data *data = arg;
2005 data->pending = false;
2006 return NL_STOP;
2007 }
2008
2009 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2010 {
2011 struct bridge_vlan_check_data *data = arg;
2012 data->pending = false;
2013 return NL_STOP;
2014 }
2015
2016 int system_bridge_vlan_check(struct device *dev, char *ifname)
2017 {
2018 struct bridge_vlan_check_data data = {
2019 .check_dev = dev,
2020 .ifindex = if_nametoindex(ifname),
2021 .ret = -1,
2022 .pending = true,
2023 };
2024 static struct ifinfomsg ifi = {
2025 .ifi_family = AF_BRIDGE
2026 };
2027 static struct rtattr ext_req = {
2028 .rta_type = IFLA_EXT_MASK,
2029 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2030 };
2031 uint32_t filter = RTEXT_FILTER_BRVLAN;
2032 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2033 struct bridge_vlan *vlan;
2034 struct nl_msg *msg;
2035 int i;
2036
2037 if (!data.ifindex)
2038 return 0;
2039
2040 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2041
2042 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2043 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2044 nlmsg_append(msg, &filter, sizeof(filter), 0))
2045 goto free;
2046
2047 vlist_for_each_element(&dev->vlans, vlan, node) {
2048 struct bridge_vlan_hotplug_port *port;
2049
2050 for (i = 0; i < vlan->n_ports; i++) {
2051 if (!strcmp(vlan->ports[i].ifname, ifname))
2052 vlan->ports[i].check = 0;
2053 else
2054 vlan->ports[i].check = -1;
2055 }
2056
2057 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2058 if (!strcmp(port->port.ifname, ifname))
2059 port->port.check = 0;
2060 else
2061 port->port.check = -1;
2062 }
2063 }
2064
2065 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2066 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2067 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2068 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2069
2070 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2071 goto free;
2072
2073 data.ret = 0;
2074 while (data.pending)
2075 nl_recvmsgs(sock_rtnl, cb);
2076
2077 vlist_for_each_element(&dev->vlans, vlan, node) {
2078 struct bridge_vlan_hotplug_port *port;
2079
2080 for (i = 0; i < vlan->n_ports; i++) {
2081 if (!vlan->ports[i].check) {
2082 data.ret = 1;
2083 break;
2084 }
2085 }
2086
2087 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2088 if (!port->port.check) {
2089 data.ret = 1;
2090 break;
2091 }
2092 }
2093 }
2094
2095 goto out;
2096
2097 free:
2098 nlmsg_free(msg);
2099 out:
2100 nl_cb_put(cb);
2101 return data.ret;
2102 }
2103
2104 int system_if_check(struct device *dev)
2105 {
2106 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2107 struct nl_msg *msg;
2108 struct ifinfomsg ifi = {
2109 .ifi_family = AF_UNSPEC,
2110 .ifi_index = 0,
2111 };
2112 struct if_check_data chk = {
2113 .dev = dev,
2114 .pending = 1,
2115 };
2116 int ret = 1;
2117
2118 if (!cb)
2119 return ret;
2120
2121 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2122 if (!msg)
2123 goto out;
2124
2125 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2126 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2127 goto free;
2128
2129 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2130 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2131 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2132
2133 ret = nl_send_auto_complete(sock_rtnl, msg);
2134 if (ret < 0)
2135 goto free;
2136
2137 while (chk.pending > 0)
2138 nl_recvmsgs(sock_rtnl, cb);
2139
2140 ret = chk.pending;
2141
2142 free:
2143 nlmsg_free(msg);
2144 out:
2145 nl_cb_put(cb);
2146 return ret;
2147 }
2148
2149 struct device *
2150 system_if_get_parent(struct device *dev)
2151 {
2152 char buf[64], *devname;
2153 int ifindex, iflink, len;
2154 FILE *f;
2155
2156 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
2157 f = fopen(buf, "r");
2158 if (!f)
2159 return NULL;
2160
2161 len = fread(buf, 1, sizeof(buf) - 1, f);
2162 fclose(f);
2163
2164 if (len <= 0)
2165 return NULL;
2166
2167 buf[len] = 0;
2168 iflink = strtoul(buf, NULL, 0);
2169 ifindex = system_if_resolve(dev);
2170 if (!iflink || iflink == ifindex)
2171 return NULL;
2172
2173 devname = if_indextoname(iflink, buf);
2174 if (!devname)
2175 return NULL;
2176
2177 return device_get(devname, true);
2178 }
2179
2180 static bool
2181 read_string_file(int dir_fd, const char *file, char *buf, int len)
2182 {
2183 bool ret = false;
2184 char *c;
2185 int fd;
2186
2187 fd = openat(dir_fd, file, O_RDONLY);
2188 if (fd < 0)
2189 return false;
2190
2191 retry:
2192 len = read(fd, buf, len - 1);
2193 if (len < 0) {
2194 if (errno == EINTR)
2195 goto retry;
2196 } else if (len > 0) {
2197 buf[len] = 0;
2198
2199 c = strchr(buf, '\n');
2200 if (c)
2201 *c = 0;
2202
2203 ret = true;
2204 }
2205
2206 close(fd);
2207
2208 return ret;
2209 }
2210
2211 static bool
2212 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2213 {
2214 char buf[64];
2215 bool ret = false;
2216
2217 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2218 if (ret)
2219 *val = strtoull(buf, NULL, 0);
2220
2221 return ret;
2222 }
2223
2224 /* Assume advertised flags == supported flags */
2225 static const struct {
2226 uint32_t mask;
2227 const char *name;
2228 } ethtool_link_modes[] = {
2229 { ADVERTISED_10baseT_Half, "10baseT-H" },
2230 { ADVERTISED_10baseT_Full, "10baseT-F" },
2231 { ADVERTISED_100baseT_Half, "100baseT-H" },
2232 { ADVERTISED_100baseT_Full, "100baseT-F" },
2233 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
2234 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
2235 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
2236 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
2237 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
2238 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
2239 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
2240 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
2241 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
2242 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
2243 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
2244 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
2245 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
2246 #ifdef ADVERTISED_56000baseKR4_Full
2247 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
2248 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
2249 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
2250 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
2251 #endif
2252 };
2253
2254 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
2255 {
2256 int i;
2257 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
2258 if (mask & ethtool_link_modes[i].mask)
2259 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
2260 }
2261 }
2262
2263 bool
2264 system_if_force_external(const char *ifname)
2265 {
2266 char buf[64];
2267 struct stat s;
2268
2269 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
2270 return stat(buf, &s) == 0;
2271 }
2272
2273 int
2274 system_if_dump_info(struct device *dev, struct blob_buf *b)
2275 {
2276 struct ethtool_cmd ecmd;
2277 struct ifreq ifr;
2278 char *s;
2279 void *c;
2280
2281 memset(&ecmd, 0, sizeof(ecmd));
2282 memset(&ifr, 0, sizeof(ifr));
2283 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2284 ifr.ifr_data = (caddr_t) &ecmd;
2285 ecmd.cmd = ETHTOOL_GSET;
2286
2287 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2288 c = blobmsg_open_array(b, "link-advertising");
2289 system_add_link_modes(b, ecmd.advertising);
2290 blobmsg_close_array(b, c);
2291
2292 c = blobmsg_open_array(b, "link-partner-advertising");
2293 system_add_link_modes(b, ecmd.lp_advertising);
2294 blobmsg_close_array(b, c);
2295
2296 c = blobmsg_open_array(b, "link-supported");
2297 system_add_link_modes(b, ecmd.supported);
2298 blobmsg_close_array(b, c);
2299
2300 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2301 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2302 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2303 blobmsg_add_string_buffer(b);
2304
2305 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2306 }
2307
2308 return 0;
2309 }
2310
2311 int
2312 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2313 {
2314 const char *const counters[] = {
2315 "collisions", "rx_frame_errors", "tx_compressed",
2316 "multicast", "rx_length_errors", "tx_dropped",
2317 "rx_bytes", "rx_missed_errors", "tx_errors",
2318 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2319 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2320 "rx_dropped", "tx_aborted_errors", "tx_packets",
2321 "rx_errors", "tx_bytes", "tx_window_errors",
2322 "rx_fifo_errors", "tx_carrier_errors",
2323 };
2324 char buf[64];
2325 int stats_dir;
2326 int i;
2327 uint64_t val = 0;
2328
2329 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
2330 stats_dir = open(buf, O_DIRECTORY);
2331 if (stats_dir < 0)
2332 return -1;
2333
2334 for (i = 0; i < ARRAY_SIZE(counters); i++)
2335 if (read_uint64_file(stats_dir, counters[i], &val))
2336 blobmsg_add_u64(b, counters[i], val);
2337
2338 close(stats_dir);
2339 return 0;
2340 }
2341
2342 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2343 {
2344 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2345 int alen = v4 ? 4 : 16;
2346 unsigned int flags = 0;
2347 struct ifaddrmsg ifa = {
2348 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2349 .ifa_prefixlen = addr->mask,
2350 .ifa_index = dev->ifindex,
2351 };
2352
2353 struct nl_msg *msg;
2354 if (cmd == RTM_NEWADDR)
2355 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2356
2357 msg = nlmsg_alloc_simple(cmd, flags);
2358 if (!msg)
2359 return -1;
2360
2361 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2362 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2363 if (v4) {
2364 if (addr->broadcast)
2365 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2366 if (addr->point_to_point)
2367 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2368 } else {
2369 time_t now = system_get_rtime();
2370 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2371
2372 if (addr->preferred_until) {
2373 int64_t preferred = addr->preferred_until - now;
2374 if (preferred < 0)
2375 preferred = 0;
2376 else if (preferred > UINT32_MAX)
2377 preferred = UINT32_MAX;
2378
2379 cinfo.ifa_prefered = preferred;
2380 }
2381
2382 if (addr->valid_until) {
2383 int64_t valid = addr->valid_until - now;
2384 if (valid <= 0) {
2385 nlmsg_free(msg);
2386 return -1;
2387 }
2388 else if (valid > UINT32_MAX)
2389 valid = UINT32_MAX;
2390
2391 cinfo.ifa_valid = valid;
2392 }
2393
2394 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2395
2396 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2397 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2398 }
2399
2400 return system_rtnl_call(msg);
2401 }
2402
2403 int system_add_address(struct device *dev, struct device_addr *addr)
2404 {
2405 return system_addr(dev, addr, RTM_NEWADDR);
2406 }
2407
2408 int system_del_address(struct device *dev, struct device_addr *addr)
2409 {
2410 return system_addr(dev, addr, RTM_DELADDR);
2411 }
2412
2413 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2414 {
2415 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2416 unsigned int flags = 0;
2417 struct ndmsg ndm = {
2418 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2419 .ndm_ifindex = dev->ifindex,
2420 .ndm_state = NUD_PERMANENT,
2421 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2422 };
2423 struct nl_msg *msg;
2424
2425 if (cmd == RTM_NEWNEIGH)
2426 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2427
2428 msg = nlmsg_alloc_simple(cmd, flags);
2429
2430 if (!msg)
2431 return -1;
2432
2433 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2434
2435 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2436 if (neighbor->flags & DEVNEIGH_MAC)
2437 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2438
2439
2440 return system_rtnl_call(msg);
2441 }
2442
2443 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2444 {
2445 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2446 }
2447
2448 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2449 {
2450 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2451 }
2452
2453 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2454 {
2455 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2456 bool have_gw;
2457 unsigned int flags = 0;
2458
2459 if (alen == 4)
2460 have_gw = !!route->nexthop.in.s_addr;
2461 else
2462 have_gw = route->nexthop.in6.s6_addr32[0] ||
2463 route->nexthop.in6.s6_addr32[1] ||
2464 route->nexthop.in6.s6_addr32[2] ||
2465 route->nexthop.in6.s6_addr32[3];
2466
2467 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2468 ? route->table : RT_TABLE_MAIN;
2469
2470 struct rtmsg rtm = {
2471 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2472 .rtm_dst_len = route->mask,
2473 .rtm_src_len = route->sourcemask,
2474 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2475 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2476 .rtm_scope = RT_SCOPE_NOWHERE,
2477 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2478 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2479 };
2480 struct nl_msg *msg;
2481
2482 if (cmd == RTM_NEWROUTE) {
2483 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2484
2485 if (!dev) { /* Add null-route */
2486 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2487 rtm.rtm_type = RTN_UNREACHABLE;
2488 }
2489 else
2490 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2491 }
2492
2493 if (route->flags & DEVROUTE_TYPE) {
2494 rtm.rtm_type = route->type;
2495 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2496 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2497 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2498 rtm.rtm_table = RT_TABLE_LOCAL;
2499 }
2500
2501 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2502 rtm.rtm_scope = RT_SCOPE_HOST;
2503 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2504 rtm.rtm_type == RTN_ANYCAST) {
2505 rtm.rtm_scope = RT_SCOPE_LINK;
2506 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2507 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2508 rtm.rtm_type == RTN_THROW) {
2509 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2510 dev = NULL;
2511 }
2512 }
2513
2514 msg = nlmsg_alloc_simple(cmd, flags);
2515 if (!msg)
2516 return -1;
2517
2518 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2519
2520 if (route->mask)
2521 nla_put(msg, RTA_DST, alen, &route->addr);
2522
2523 if (route->sourcemask) {
2524 if (rtm.rtm_family == AF_INET)
2525 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2526 else
2527 nla_put(msg, RTA_SRC, alen, &route->source);
2528 }
2529
2530 if (route->metric > 0)
2531 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2532
2533 if (have_gw)
2534 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2535
2536 if (dev)
2537 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2538
2539 if (table >= 256)
2540 nla_put_u32(msg, RTA_TABLE, table);
2541
2542 if (route->flags & DEVROUTE_MTU) {
2543 struct nlattr *metrics;
2544
2545 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2546 goto nla_put_failure;
2547
2548 nla_put_u32(msg, RTAX_MTU, route->mtu);
2549
2550 nla_nest_end(msg, metrics);
2551 }
2552
2553 return system_rtnl_call(msg);
2554
2555 nla_put_failure:
2556 nlmsg_free(msg);
2557 return -ENOMEM;
2558 }
2559
2560 int system_add_route(struct device *dev, struct device_route *route)
2561 {
2562 return system_rt(dev, route, RTM_NEWROUTE);
2563 }
2564
2565 int system_del_route(struct device *dev, struct device_route *route)
2566 {
2567 return system_rt(dev, route, RTM_DELROUTE);
2568 }
2569
2570 int system_flush_routes(void)
2571 {
2572 const char *names[] = {
2573 "/proc/sys/net/ipv4/route/flush",
2574 "/proc/sys/net/ipv6/route/flush"
2575 };
2576 int fd, i;
2577
2578 for (i = 0; i < ARRAY_SIZE(names); i++) {
2579 fd = open(names[i], O_WRONLY);
2580 if (fd < 0)
2581 continue;
2582
2583 if (write(fd, "-1", 2)) {}
2584 close(fd);
2585 }
2586 return 0;
2587 }
2588
2589 bool system_resolve_rt_type(const char *type, unsigned int *id)
2590 {
2591 return system_rtn_aton(type, id);
2592 }
2593
2594 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2595 {
2596 FILE *f;
2597 char *e, buf[128];
2598 unsigned int n, proto = 256;
2599 n = strtoul(type, &e, 0);
2600 if (!*e && e != type)
2601 proto = n;
2602 else if (!strcmp(type, "unspec"))
2603 proto = RTPROT_UNSPEC;
2604 else if (!strcmp(type, "kernel"))
2605 proto = RTPROT_KERNEL;
2606 else if (!strcmp(type, "boot"))
2607 proto = RTPROT_BOOT;
2608 else if (!strcmp(type, "static"))
2609 proto = RTPROT_STATIC;
2610 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2611 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2612 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2613 continue;
2614
2615 n = strtoul(e, NULL, 10);
2616 e = strtok(NULL, " \t\n");
2617
2618 if (e && !strcmp(e, type)) {
2619 proto = n;
2620 break;
2621 }
2622 }
2623 fclose(f);
2624 }
2625
2626 if (proto > 255)
2627 return false;
2628
2629 *id = proto;
2630 return true;
2631 }
2632
2633 bool system_resolve_rt_table(const char *name, unsigned int *id)
2634 {
2635 FILE *f;
2636 char *e, buf[128];
2637 unsigned int n, table = RT_TABLE_UNSPEC;
2638
2639 /* first try to parse table as number */
2640 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2641 table = n;
2642
2643 /* handle well known aliases */
2644 else if (!strcmp(name, "default"))
2645 table = RT_TABLE_DEFAULT;
2646 else if (!strcmp(name, "main"))
2647 table = RT_TABLE_MAIN;
2648 else if (!strcmp(name, "local"))
2649 table = RT_TABLE_LOCAL;
2650
2651 /* try to look up name in /etc/iproute2/rt_tables */
2652 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2653 {
2654 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2655 {
2656 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2657 continue;
2658
2659 n = strtoul(e, NULL, 10);
2660 e = strtok(NULL, " \t\n");
2661
2662 if (e && !strcmp(e, name))
2663 {
2664 table = n;
2665 break;
2666 }
2667 }
2668
2669 fclose(f);
2670 }
2671
2672 if (table == RT_TABLE_UNSPEC)
2673 return false;
2674
2675 *id = table;
2676 return true;
2677 }
2678
2679 bool system_is_default_rt_table(unsigned int id)
2680 {
2681 return (id == RT_TABLE_MAIN);
2682 }
2683
2684 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2685 {
2686 char *e;
2687 unsigned int n;
2688
2689 if (!strcmp(filter, "strict"))
2690 n = 1;
2691 else if (!strcmp(filter, "loose"))
2692 n = 2;
2693 else {
2694 n = strtoul(filter, &e, 0);
2695 if (*e || e == filter || n > 2)
2696 return false;
2697 }
2698
2699 *id = n;
2700 return true;
2701 }
2702
2703 static int system_iprule(struct iprule *rule, int cmd)
2704 {
2705 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2706
2707 struct nl_msg *msg;
2708 struct rtmsg rtm = {
2709 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2710 .rtm_protocol = RTPROT_STATIC,
2711 .rtm_scope = RT_SCOPE_UNIVERSE,
2712 .rtm_table = RT_TABLE_UNSPEC,
2713 .rtm_type = RTN_UNSPEC,
2714 .rtm_flags = 0,
2715 };
2716
2717 if (cmd == RTM_NEWRULE)
2718 rtm.rtm_type = RTN_UNICAST;
2719
2720 if (rule->invert)
2721 rtm.rtm_flags |= FIB_RULE_INVERT;
2722
2723 if (rule->flags & IPRULE_SRC)
2724 rtm.rtm_src_len = rule->src_mask;
2725
2726 if (rule->flags & IPRULE_DEST)
2727 rtm.rtm_dst_len = rule->dest_mask;
2728
2729 if (rule->flags & IPRULE_TOS)
2730 rtm.rtm_tos = rule->tos;
2731
2732 if (rule->flags & IPRULE_LOOKUP) {
2733 if (rule->lookup < 256)
2734 rtm.rtm_table = rule->lookup;
2735 }
2736
2737 if (rule->flags & IPRULE_ACTION)
2738 rtm.rtm_type = rule->action;
2739 else if (rule->flags & IPRULE_GOTO)
2740 rtm.rtm_type = FR_ACT_GOTO;
2741 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2742 rtm.rtm_type = FR_ACT_NOP;
2743
2744 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2745
2746 if (!msg)
2747 return -1;
2748
2749 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2750
2751 if (rule->flags & IPRULE_IN)
2752 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2753
2754 if (rule->flags & IPRULE_OUT)
2755 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2756
2757 if (rule->flags & IPRULE_SRC)
2758 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2759
2760 if (rule->flags & IPRULE_DEST)
2761 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2762
2763 if (rule->flags & IPRULE_PRIORITY)
2764 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2765 else if (cmd == RTM_NEWRULE)
2766 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2767
2768 if (rule->flags & IPRULE_FWMARK)
2769 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2770
2771 if (rule->flags & IPRULE_FWMASK)
2772 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2773
2774 if (rule->flags & IPRULE_LOOKUP) {
2775 if (rule->lookup >= 256)
2776 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2777 }
2778
2779 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2780 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2781
2782 if (rule->flags & IPRULE_GOTO)
2783 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2784
2785 return system_rtnl_call(msg);
2786 }
2787
2788 int system_add_iprule(struct iprule *rule)
2789 {
2790 return system_iprule(rule, RTM_NEWRULE);
2791 }
2792
2793 int system_del_iprule(struct iprule *rule)
2794 {
2795 return system_iprule(rule, RTM_DELRULE);
2796 }
2797
2798 int system_flush_iprules(void)
2799 {
2800 int rv = 0;
2801 struct iprule rule;
2802
2803 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2804 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2805
2806 memset(&rule, 0, sizeof(rule));
2807
2808
2809 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2810
2811 rule.priority = 0;
2812 rule.lookup = RT_TABLE_LOCAL;
2813 rv |= system_iprule(&rule, RTM_NEWRULE);
2814
2815 rule.priority = 32766;
2816 rule.lookup = RT_TABLE_MAIN;
2817 rv |= system_iprule(&rule, RTM_NEWRULE);
2818
2819 rule.priority = 32767;
2820 rule.lookup = RT_TABLE_DEFAULT;
2821 rv |= system_iprule(&rule, RTM_NEWRULE);
2822
2823
2824 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2825
2826 rule.priority = 0;
2827 rule.lookup = RT_TABLE_LOCAL;
2828 rv |= system_iprule(&rule, RTM_NEWRULE);
2829
2830 rule.priority = 32766;
2831 rule.lookup = RT_TABLE_MAIN;
2832 rv |= system_iprule(&rule, RTM_NEWRULE);
2833
2834 return rv;
2835 }
2836
2837 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2838 {
2839 return system_rtn_aton(action, id);
2840 }
2841
2842 time_t system_get_rtime(void)
2843 {
2844 struct timespec ts;
2845 struct timeval tv;
2846
2847 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2848 return ts.tv_sec;
2849
2850 if (gettimeofday(&tv, NULL) == 0)
2851 return tv.tv_sec;
2852
2853 return 0;
2854 }
2855
2856 #ifndef IP_DF
2857 #define IP_DF 0x4000
2858 #endif
2859
2860 static int tunnel_ioctl(const char *name, int cmd, void *p)
2861 {
2862 struct ifreq ifr;
2863
2864 memset(&ifr, 0, sizeof(ifr));
2865 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2866 ifr.ifr_ifru.ifru_data = p;
2867 return ioctl(sock_ioctl, cmd, &ifr);
2868 }
2869
2870 #ifdef IFLA_IPTUN_MAX
2871 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2872 struct blob_attr **tb)
2873 {
2874 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2875 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2876 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2877 struct blob_attr *cur;
2878 int ret = 0, ttl = 0;
2879
2880 if (!nlm)
2881 return -1;
2882
2883 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2884 nla_put_string(nlm, IFLA_IFNAME, name);
2885
2886 if (link)
2887 nla_put_u32(nlm, IFLA_LINK, link);
2888
2889 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2890 if (!linkinfo) {
2891 ret = -ENOMEM;
2892 goto failure;
2893 }
2894
2895 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2896 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2897 if (!infodata) {
2898 ret = -ENOMEM;
2899 goto failure;
2900 }
2901
2902 if (link)
2903 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2904
2905 if ((cur = tb[TUNNEL_ATTR_TTL]))
2906 ttl = blobmsg_get_u32(cur);
2907
2908 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2909 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2910
2911 struct in6_addr in6buf;
2912 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2913 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2914 ret = -EINVAL;
2915 goto failure;
2916 }
2917 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2918 }
2919
2920 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2921 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2922 ret = -EINVAL;
2923 goto failure;
2924 }
2925 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2926 }
2927
2928 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2929 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2930 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2931
2932 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2933 blobmsg_data(cur), blobmsg_len(cur));
2934
2935 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2936 char *str = blobmsg_get_string(cur);
2937
2938 if (strcmp(str, "ignore")) {
2939 char *e;
2940 unsigned encap_limit = strtoul(str, &e, 0);
2941
2942 if (e == str || *e || encap_limit > 255) {
2943 ret = -EINVAL;
2944 goto failure;
2945 }
2946
2947 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2948 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2949 }
2950 }
2951
2952 #ifdef IFLA_IPTUN_FMR_MAX
2953 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2954 struct blob_attr *rcur;
2955 unsigned rrem, fmrcnt = 0;
2956 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2957
2958 if (!fmrs) {
2959 ret = -ENOMEM;
2960 goto failure;
2961 }
2962
2963 blobmsg_for_each_attr(rcur, cur, rrem) {
2964 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2965 struct in6_addr ip6prefix;
2966 struct in_addr ip4prefix;
2967 unsigned ip4len, ip6len, ealen, offset;
2968
2969 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2970 blobmsg_data(rcur), blobmsg_len(rcur));
2971
2972 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2973 !parse_ip_and_netmask(AF_INET6,
2974 blobmsg_data(tb_cur), &ip6prefix,
2975 &ip6len)) {
2976 ret = -EINVAL;
2977 goto failure;
2978 }
2979
2980 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2981 !parse_ip_and_netmask(AF_INET,
2982 blobmsg_data(tb_cur), &ip4prefix,
2983 &ip4len)) {
2984 ret = -EINVAL;
2985 goto failure;
2986 }
2987
2988 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2989 ret = -EINVAL;
2990 goto failure;
2991 }
2992 ealen = blobmsg_get_u32(tb_cur);
2993
2994 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2995 ret = -EINVAL;
2996 goto failure;
2997 }
2998 offset = blobmsg_get_u32(tb_cur);
2999
3000 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3001 if (!rule) {
3002 ret = -ENOMEM;
3003 goto failure;
3004 }
3005
3006 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3007 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3008 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3009 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3010 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3011 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3012
3013 nla_nest_end(nlm, rule);
3014 }
3015
3016 nla_nest_end(nlm, fmrs);
3017 }
3018 #endif
3019 if (tun_flags)
3020 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3021 }
3022
3023 nla_nest_end(nlm, infodata);
3024 nla_nest_end(nlm, linkinfo);
3025
3026 return system_rtnl_call(nlm);
3027
3028 failure:
3029 nlmsg_free(nlm);
3030 return ret;
3031 }
3032 #endif
3033
3034 #ifdef IFLA_IPTUN_MAX
3035 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3036 static int system_add_gre_tunnel(const char *name, const char *kind,
3037 const unsigned int link, struct blob_attr **tb, bool v6)
3038 {
3039 struct nl_msg *nlm;
3040 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3041 struct blob_attr *cur;
3042 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3043 uint16_t iflags = 0, oflags = 0;
3044 uint8_t tos = 0;
3045 int ret = 0, ttl = 0;
3046 unsigned encap_limit = 0;
3047
3048 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3049 if (!nlm)
3050 return -1;
3051
3052 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3053 nla_put_string(nlm, IFLA_IFNAME, name);
3054
3055 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3056 if (!linkinfo) {
3057 ret = -ENOMEM;
3058 goto failure;
3059 }
3060
3061 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3062 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3063 if (!infodata) {
3064 ret = -ENOMEM;
3065 goto failure;
3066 }
3067
3068 if (link)
3069 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3070
3071 if ((cur = tb[TUNNEL_ATTR_TTL]))
3072 ttl = blobmsg_get_u32(cur);
3073
3074 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3075 char *str = blobmsg_get_string(cur);
3076 if (strcmp(str, "inherit")) {
3077 unsigned uval;
3078
3079 if (!system_tos_aton(str, &uval)) {
3080 ret = -EINVAL;
3081 goto failure;
3082 }
3083
3084 if (v6)
3085 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3086 else
3087 tos = uval;
3088 } else {
3089 if (v6)
3090 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3091 else
3092 tos = 1;
3093 }
3094 }
3095
3096 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3097 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3098
3099 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3100 blobmsg_data(cur), blobmsg_len(cur));
3101
3102 if ((cur = tb_data[GRE_DATA_IKEY])) {
3103 if ((ikey = blobmsg_get_u32(cur)))
3104 iflags |= GRE_KEY;
3105 }
3106
3107 if ((cur = tb_data[GRE_DATA_OKEY])) {
3108 if ((okey = blobmsg_get_u32(cur)))
3109 oflags |= GRE_KEY;
3110 }
3111
3112 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3113 if (blobmsg_get_bool(cur))
3114 iflags |= GRE_CSUM;
3115 }
3116
3117 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3118 if (blobmsg_get_bool(cur))
3119 oflags |= GRE_CSUM;
3120 }
3121
3122 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3123 if (blobmsg_get_bool(cur))
3124 iflags |= GRE_SEQ;
3125 }
3126
3127 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3128 if (blobmsg_get_bool(cur))
3129 oflags |= GRE_SEQ;
3130 }
3131
3132 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3133 char *str = blobmsg_get_string(cur);
3134
3135 if (strcmp(str, "ignore")) {
3136 char *e;
3137
3138 encap_limit = strtoul(str, &e, 0);
3139
3140 if (e == str || *e || encap_limit > 255) {
3141 ret = -EINVAL;
3142 goto failure;
3143 }
3144
3145 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3146 }
3147 }
3148 }
3149
3150 if (v6) {
3151 struct in6_addr in6buf;
3152 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3153 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3154 ret = -EINVAL;
3155 goto failure;
3156 }
3157 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3158 }
3159
3160 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3161 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3162 ret = -EINVAL;
3163 goto failure;
3164 }
3165 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3166 }
3167
3168 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3169 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3170
3171 if (flowinfo)
3172 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3173
3174 if (flags6)
3175 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3176
3177 if (!ttl)
3178 ttl = 64;
3179 } else {
3180 struct in_addr inbuf;
3181 bool set_df = true;
3182
3183 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3184 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3185 ret = -EINVAL;
3186 goto failure;
3187 }
3188 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3189 }
3190
3191 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3192 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3193 ret = -EINVAL;
3194 goto failure;
3195 }
3196 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3197
3198 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3199 if (!okey) {
3200 okey = inbuf.s_addr;
3201 oflags |= GRE_KEY;
3202 }
3203
3204 if (!ikey) {
3205 ikey = inbuf.s_addr;
3206 iflags |= GRE_KEY;
3207 }
3208 }
3209 }
3210
3211 if ((cur = tb[TUNNEL_ATTR_DF]))
3212 set_df = blobmsg_get_bool(cur);
3213
3214 if (!set_df) {
3215 /* ttl != 0 and nopmtudisc are incompatible */
3216 if (ttl) {
3217 ret = -EINVAL;
3218 goto failure;
3219 }
3220 } else if (!ttl)
3221 ttl = 64;
3222
3223 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3224
3225 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3226 }
3227
3228 if (ttl)
3229 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3230
3231 if (oflags)
3232 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3233
3234 if (iflags)
3235 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3236
3237 if (okey)
3238 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3239
3240 if (ikey)
3241 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3242
3243 nla_nest_end(nlm, infodata);
3244 nla_nest_end(nlm, linkinfo);
3245
3246 return system_rtnl_call(nlm);
3247
3248 failure:
3249 nlmsg_free(nlm);
3250 return ret;
3251 }
3252 #endif
3253
3254 #ifdef IFLA_VTI_MAX
3255 static int system_add_vti_tunnel(const char *name, const char *kind,
3256 const unsigned int link, struct blob_attr **tb, bool v6)
3257 {
3258 struct nl_msg *nlm;
3259 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3260 struct blob_attr *cur;
3261 int ret = 0;
3262
3263 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3264 if (!nlm)
3265 return -1;
3266
3267 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3268 nla_put_string(nlm, IFLA_IFNAME, name);
3269
3270 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3271 if (!linkinfo) {
3272 ret = -ENOMEM;
3273 goto failure;
3274 }
3275
3276 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3277 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3278 if (!infodata) {
3279 ret = -ENOMEM;
3280 goto failure;
3281 }
3282
3283 if (link)
3284 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3285
3286 if (v6) {
3287 struct in6_addr in6buf;
3288 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3289 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3290 ret = -EINVAL;
3291 goto failure;
3292 }
3293 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3294 }
3295
3296 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3297 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3298 ret = -EINVAL;
3299 goto failure;
3300 }
3301 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3302 }
3303
3304 } else {
3305 struct in_addr inbuf;
3306
3307 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3308 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3309 ret = -EINVAL;
3310 goto failure;
3311 }
3312 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3313 }
3314
3315 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3316 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3317 ret = -EINVAL;
3318 goto failure;
3319 }
3320 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3321 }
3322
3323 }
3324
3325 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3326 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3327 uint32_t ikey = 0, okey = 0;
3328
3329 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3330 blobmsg_data(cur), blobmsg_len(cur));
3331
3332 if ((cur = tb_data[VTI_DATA_IKEY])) {
3333 if ((ikey = blobmsg_get_u32(cur)))
3334 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3335 }
3336
3337 if ((cur = tb_data[VTI_DATA_OKEY])) {
3338 if ((okey = blobmsg_get_u32(cur)))
3339 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3340 }
3341 }
3342
3343 nla_nest_end(nlm, infodata);
3344 nla_nest_end(nlm, linkinfo);
3345
3346 return system_rtnl_call(nlm);
3347
3348 failure:
3349 nlmsg_free(nlm);
3350 return ret;
3351 }
3352 #endif
3353
3354 #ifdef IFLA_XFRM_MAX
3355 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3356 const unsigned int link, struct blob_attr **tb)
3357 {
3358 struct nl_msg *nlm;
3359 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3360 struct blob_attr *cur;
3361 int ret = 0;
3362
3363 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3364 if (!nlm)
3365 return -1;
3366
3367 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3368 nla_put_string(nlm, IFLA_IFNAME, name);
3369
3370 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3371 if (!linkinfo) {
3372 ret = -ENOMEM;
3373 goto failure;
3374 }
3375
3376 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3377 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3378 if (!infodata) {
3379 ret = -ENOMEM;
3380 goto failure;
3381 }
3382
3383 if (link)
3384 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3385
3386 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3387 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3388 uint32_t if_id = 0;
3389
3390 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3391 blobmsg_data(cur), blobmsg_len(cur));
3392
3393 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3394 if ((if_id = blobmsg_get_u32(cur)))
3395 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3396 }
3397
3398 }
3399
3400 nla_nest_end(nlm, infodata);
3401 nla_nest_end(nlm, linkinfo);
3402
3403 return system_rtnl_call(nlm);
3404
3405 failure:
3406 nlmsg_free(nlm);
3407 return ret;
3408 }
3409 #endif
3410
3411 #ifdef IFLA_VXLAN_MAX
3412 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3413 struct blob_attr *cur;
3414 if ((cur = tb_data[vxlandatatype])) {
3415 bool val = blobmsg_get_bool(cur);
3416 if (invert)
3417 val = !val;
3418
3419 if ((attrtype == IFLA_VXLAN_GBP) && val)
3420 nla_put_flag(msg, attrtype);
3421 else
3422 nla_put_u8(msg, attrtype, val);
3423
3424 }
3425 }
3426
3427 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3428 {
3429 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3430 struct nl_msg *msg;
3431 struct nlattr *linkinfo, *data;
3432 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3433 struct blob_attr *cur;
3434 int ret = 0;
3435
3436 if ((cur = tb[TUNNEL_ATTR_DATA]))
3437 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3438 blobmsg_data(cur), blobmsg_len(cur));
3439 else
3440 return -EINVAL;
3441
3442 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3443
3444 if (!msg)
3445 return -1;
3446
3447 nlmsg_append(msg, &iim, sizeof(iim), 0);
3448
3449 nla_put_string(msg, IFLA_IFNAME, name);
3450
3451 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3452 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3453 if (!ea) {
3454 ret = -EINVAL;
3455 goto failure;
3456 }
3457
3458 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3459 }
3460
3461 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3462 uint32_t mtu = blobmsg_get_u32(cur);
3463 nla_put_u32(msg, IFLA_MTU, mtu);
3464 }
3465
3466 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3467 ret = -ENOMEM;
3468 goto failure;
3469 }
3470
3471 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3472
3473 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3474 ret = -ENOMEM;
3475 goto failure;
3476 }
3477
3478 if (link)
3479 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3480
3481 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3482 uint32_t id = blobmsg_get_u32(cur);
3483 if (id >= (1u << 24) - 1) {
3484 ret = -EINVAL;
3485 goto failure;
3486 }
3487
3488 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3489 }
3490
3491 if (v6) {
3492 struct in6_addr in6buf;
3493 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3494 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3495 ret = -EINVAL;
3496 goto failure;
3497 }
3498 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3499 }
3500
3501 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3502 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3503 ret = -EINVAL;
3504 goto failure;
3505 }
3506 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3507 }
3508 } else {
3509 struct in_addr inbuf;
3510
3511 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3512 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3513 ret = -EINVAL;
3514 goto failure;
3515 }
3516 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3517 }
3518
3519 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3520 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3521 ret = -EINVAL;
3522 goto failure;
3523 }
3524 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3525 }
3526 }
3527
3528 uint32_t port = 4789;
3529 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3530 port = blobmsg_get_u32(cur);
3531 if (port < 1 || port > 65535) {
3532 ret = -EINVAL;
3533 goto failure;
3534 }
3535 }
3536 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3537
3538 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3539 struct ifla_vxlan_port_range srcports = {0,0};
3540
3541 uint32_t low = blobmsg_get_u32(cur);
3542 if (low < 1 || low > 65535 - 1) {
3543 ret = -EINVAL;
3544 goto failure;
3545 }
3546
3547 srcports.low = htons((uint16_t) low);
3548 srcports.high = htons((uint16_t) (low+1));
3549
3550 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3551 uint32_t high = blobmsg_get_u32(cur);
3552 if (high < 1 || high > 65535) {
3553 ret = -EINVAL;
3554 goto failure;
3555 }
3556
3557 if (high > low)
3558 srcports.high = htons((uint16_t) high);
3559 }
3560
3561 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3562 }
3563
3564 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3565 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3566 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3567 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3568 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3569 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3570 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3571 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3572 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3573
3574 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3575 uint32_t ageing = blobmsg_get_u32(cur);
3576 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3577 }
3578
3579 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3580 uint32_t maxaddress = blobmsg_get_u32(cur);
3581 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3582 }
3583
3584 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3585 char *str = blobmsg_get_string(cur);
3586 unsigned tos = 1;
3587
3588 if (strcmp(str, "inherit")) {
3589 if (!system_tos_aton(str, &tos)) {
3590 ret = -EINVAL;
3591 goto failure;
3592 }
3593 }
3594
3595 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3596 }
3597
3598 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3599 uint32_t ttl = blobmsg_get_u32(cur);
3600 if (ttl < 1 || ttl > 255) {
3601 ret = -EINVAL;
3602 goto failure;
3603 }
3604
3605 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3606 }
3607
3608 nla_nest_end(msg, data);
3609 nla_nest_end(msg, linkinfo);
3610
3611 ret = system_rtnl_call(msg);
3612 if (ret)
3613 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3614
3615 return ret;
3616
3617 failure:
3618 nlmsg_free(msg);
3619 return ret;
3620 }
3621 #endif
3622
3623 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3624 {
3625 struct blob_attr *cur;
3626 int ret = 0;
3627
3628 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3629 return -1;
3630
3631 #ifdef SIOCADD6RD
3632 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3633 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3634 unsigned int mask;
3635 struct ip_tunnel_6rd p6;
3636
3637 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3638 blobmsg_data(cur), blobmsg_len(cur));
3639
3640 memset(&p6, 0, sizeof(p6));
3641
3642 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3643 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3644 &p6.prefix, &mask) || mask > 128) {
3645 ret = -EINVAL;
3646 goto failure;
3647 }
3648
3649 p6.prefixlen = mask;
3650 }
3651
3652 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3653 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3654 &p6.relay_prefix, &mask) || mask > 32) {
3655 ret = -EINVAL;
3656 goto failure;
3657 }
3658
3659 p6.relay_prefixlen = mask;
3660 }
3661
3662 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3663 ret = -1;
3664 goto failure;
3665 }
3666 }
3667 #endif
3668
3669 return ret;
3670
3671 failure:
3672 __system_del_ip_tunnel(name, tb);
3673 return ret;
3674 }
3675
3676 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3677 {
3678 struct blob_attr *cur;
3679 bool set_df = true;
3680 struct ip_tunnel_parm p = {
3681 .link = link,
3682 .iph = {
3683 .version = 4,
3684 .ihl = 5,
3685 .protocol = proto,
3686 }
3687 };
3688
3689 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3690 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3691 return -EINVAL;
3692
3693 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3694 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3695 return -EINVAL;
3696
3697 if ((cur = tb[TUNNEL_ATTR_DF]))
3698 set_df = blobmsg_get_bool(cur);
3699
3700 if ((cur = tb[TUNNEL_ATTR_TTL]))
3701 p.iph.ttl = blobmsg_get_u32(cur);
3702
3703 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3704 char *str = blobmsg_get_string(cur);
3705 if (strcmp(str, "inherit")) {
3706 unsigned uval;
3707
3708 if (!system_tos_aton(str, &uval))
3709 return -EINVAL;
3710
3711 p.iph.tos = uval;
3712 } else
3713 p.iph.tos = 1;
3714 }
3715
3716 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3717 /* ttl !=0 and nopmtudisc are incompatible */
3718 if (p.iph.ttl && p.iph.frag_off == 0)
3719 return -EINVAL;
3720
3721 strncpy(p.name, name, sizeof(p.name) - 1);
3722
3723 switch (p.iph.protocol) {
3724 case IPPROTO_IPIP:
3725 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3726 case IPPROTO_IPV6:
3727 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3728 default:
3729 break;
3730 }
3731 return -1;
3732 }
3733
3734 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3735 {
3736 struct blob_attr *cur;
3737 const char *str;
3738
3739 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3740 return -EINVAL;
3741 str = blobmsg_data(cur);
3742
3743 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3744 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3745 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3746 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3747 !strcmp(str, "xfrm"))
3748 return system_link_del(name);
3749 else
3750 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3751 }
3752
3753 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3754 {
3755 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3756
3757 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3758 blob_data(attr), blob_len(attr));
3759
3760 return __system_del_ip_tunnel(name, tb);
3761 }
3762
3763 int system_update_ipv6_mtu(struct device *dev, int mtu)
3764 {
3765 int ret = -1;
3766 char buf[64];
3767 int fd;
3768
3769 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3770 dev->ifname);
3771
3772 fd = open(buf, O_RDWR);
3773 if (fd < 0)
3774 return ret;
3775
3776 if (!mtu) {
3777 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3778 if (len < 0)
3779 goto out;
3780
3781 buf[len] = 0;
3782 ret = atoi(buf);
3783 } else {
3784 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3785 ret = mtu;
3786 }
3787
3788 out:
3789 close(fd);
3790 return ret;
3791 }
3792
3793 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3794 {
3795 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3796 struct blob_attr *cur;
3797 const char *str;
3798
3799 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3800 blob_data(attr), blob_len(attr));
3801
3802 __system_del_ip_tunnel(name, tb);
3803
3804 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3805 return -EINVAL;
3806 str = blobmsg_data(cur);
3807
3808 unsigned int ttl = 0;
3809 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3810 ttl = blobmsg_get_u32(cur);
3811 if (ttl > 255)
3812 return -EINVAL;
3813 }
3814
3815 unsigned int link = 0;
3816 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3817 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3818 if (!iface)
3819 return -EINVAL;
3820
3821 if (iface->l3_dev.dev)
3822 link = iface->l3_dev.dev->ifindex;
3823 }
3824
3825 if (!strcmp(str, "sit"))
3826 return system_add_sit_tunnel(name, link, tb);
3827 #ifdef IFLA_IPTUN_MAX
3828 else if (!strcmp(str, "ipip6")) {
3829 return system_add_ip6_tunnel(name, link, tb);
3830 } else if (!strcmp(str, "greip")) {
3831 return system_add_gre_tunnel(name, "gre", link, tb, false);
3832 } else if (!strcmp(str, "gretapip")) {
3833 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3834 } else if (!strcmp(str, "greip6")) {
3835 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3836 } else if (!strcmp(str, "gretapip6")) {
3837 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3838 #ifdef IFLA_VTI_MAX
3839 } else if (!strcmp(str, "vtiip")) {
3840 return system_add_vti_tunnel(name, "vti", link, tb, false);
3841 } else if (!strcmp(str, "vtiip6")) {
3842 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3843 #endif
3844 #ifdef IFLA_XFRM_MAX
3845 } else if (!strcmp(str, "xfrm")) {
3846 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3847 #endif
3848 #ifdef IFLA_VXLAN_MAX
3849 } else if(!strcmp(str, "vxlan")) {
3850 return system_add_vxlan(name, link, tb, false);
3851 } else if(!strcmp(str, "vxlan6")) {
3852 return system_add_vxlan(name, link, tb, true);
3853 #endif
3854 #endif
3855 } else if (!strcmp(str, "ipip")) {
3856 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3857 }
3858 else
3859 return -EINVAL;
3860
3861 return 0;
3862 }
OpenWrt Network interface configuration daemon