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