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bridge: tune default stp parameters
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19 #define _GNU_SOURCE
20
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/stat.h>
24 #include <sys/syscall.h>
25
26 #include <net/if.h>
27 #include <net/if_arp.h>
28
29 #include <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/in.h>
32 #include <netinet/ether.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #ifndef RTN_FAILED_POLICY
52 #define RTN_FAILED_POLICY 12
53 #endif
54
55 #ifndef IFA_F_NOPREFIXROUTE
56 #define IFA_F_NOPREFIXROUTE 0x200
57 #endif
58
59 #ifndef IFA_FLAGS
60 #define IFA_FLAGS (IFA_MULTICAST + 1)
61 #endif
62
63 #include <string.h>
64 #include <fcntl.h>
65 #include <glob.h>
66 #include <time.h>
67 #include <unistd.h>
68
69 #include <netlink/msg.h>
70 #include <netlink/attr.h>
71 #include <netlink/socket.h>
72 #include <libubox/uloop.h>
73
74 #include "netifd.h"
75 #include "device.h"
76 #include "system.h"
77 #include "utils.h"
78
79 struct event_socket {
80 struct uloop_fd uloop;
81 struct nl_sock *sock;
82 int bufsize;
83 };
84
85 static int sock_ioctl = -1;
86 static struct nl_sock *sock_rtnl = NULL;
87
88 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
89 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
90 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
91 const unsigned int link, struct blob_attr **tb);
92 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
93
94 static char dev_buf[256];
95
96 static void
97 handler_nl_event(struct uloop_fd *u, unsigned int events)
98 {
99 struct event_socket *ev = container_of(u, struct event_socket, uloop);
100 int err;
101 socklen_t errlen = sizeof(err);
102
103 if (!u->error) {
104 nl_recvmsgs_default(ev->sock);
105 return;
106 }
107
108 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
109 goto abort;
110
111 switch(err) {
112 case ENOBUFS:
113 /* Increase rx buffer size on netlink socket */
114 ev->bufsize *= 2;
115 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
116 goto abort;
117
118 /* Request full dump since some info got dropped */
119 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
120 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
121 break;
122
123 default:
124 goto abort;
125 }
126 u->error = false;
127 return;
128
129 abort:
130 uloop_fd_delete(&ev->uloop);
131 return;
132 }
133
134 static struct nl_sock *
135 create_socket(int protocol, int groups)
136 {
137 struct nl_sock *sock;
138
139 sock = nl_socket_alloc();
140 if (!sock)
141 return NULL;
142
143 if (groups)
144 nl_join_groups(sock, groups);
145
146 if (nl_connect(sock, protocol)) {
147 nl_socket_free(sock);
148 return NULL;
149 }
150
151 return sock;
152 }
153
154 static bool
155 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
156 uloop_fd_handler cb, int flags)
157 {
158 ev->sock = create_socket(protocol, groups);
159 if (!ev->sock)
160 return false;
161
162 ev->uloop.fd = nl_socket_get_fd(ev->sock);
163 ev->uloop.cb = cb;
164 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
165 return false;
166
167 return true;
168 }
169
170 static bool
171 create_event_socket(struct event_socket *ev, int protocol,
172 int (*cb)(struct nl_msg *msg, void *arg))
173 {
174 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
175 return false;
176
177 /* Install the valid custom callback handler */
178 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
179
180 /* Disable sequence number checking on event sockets */
181 nl_socket_disable_seq_check(ev->sock);
182
183 /* Increase rx buffer size to 65K on event sockets */
184 ev->bufsize = 65535;
185 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
186 return false;
187
188 return true;
189 }
190
191 static bool
192 create_hotplug_event_socket(struct event_socket *ev, int protocol,
193 void (*cb)(struct uloop_fd *u, unsigned int events))
194 {
195 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
196 return false;
197
198 /* Increase rx buffer size to 65K on event sockets */
199 ev->bufsize = 65535;
200 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
201 return false;
202
203 return true;
204 }
205
206 static bool
207 system_rtn_aton(const char *src, unsigned int *dst)
208 {
209 char *e;
210 unsigned int n;
211
212 if (!strcmp(src, "local"))
213 n = RTN_LOCAL;
214 else if (!strcmp(src, "nat"))
215 n = RTN_NAT;
216 else if (!strcmp(src, "broadcast"))
217 n = RTN_BROADCAST;
218 else if (!strcmp(src, "anycast"))
219 n = RTN_ANYCAST;
220 else if (!strcmp(src, "multicast"))
221 n = RTN_MULTICAST;
222 else if (!strcmp(src, "prohibit"))
223 n = RTN_PROHIBIT;
224 else if (!strcmp(src, "unreachable"))
225 n = RTN_UNREACHABLE;
226 else if (!strcmp(src, "blackhole"))
227 n = RTN_BLACKHOLE;
228 else if (!strcmp(src, "xresolve"))
229 n = RTN_XRESOLVE;
230 else if (!strcmp(src, "unicast"))
231 n = RTN_UNICAST;
232 else if (!strcmp(src, "throw"))
233 n = RTN_THROW;
234 else if (!strcmp(src, "failed_policy"))
235 n = RTN_FAILED_POLICY;
236 else {
237 n = strtoul(src, &e, 0);
238 if (!e || *e || e == src || n > 255)
239 return false;
240 }
241
242 *dst = n;
243 return true;
244 }
245
246 static bool
247 system_tos_aton(const char *src, unsigned *dst)
248 {
249 char *e;
250
251 *dst = strtoul(src, &e, 16);
252 if (e == src || *e || *dst > 255)
253 return false;
254
255 return true;
256 }
257
258 int system_init(void)
259 {
260 static struct event_socket rtnl_event;
261 static struct event_socket hotplug_event;
262
263 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
264 system_fd_set_cloexec(sock_ioctl);
265
266 /* Prepare socket for routing / address control */
267 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
268 if (!sock_rtnl)
269 return -1;
270
271 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
272 return -1;
273
274 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
275 handle_hotplug_event))
276 return -1;
277
278 /* Receive network link events form kernel */
279 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
280
281 return 0;
282 }
283
284 static void system_set_sysctl(const char *path, const char *val)
285 {
286 int fd;
287
288 fd = open(path, O_WRONLY);
289 if (fd < 0)
290 return;
291
292 if (write(fd, val, strlen(val))) {}
293 close(fd);
294 }
295
296 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
297 {
298 snprintf(dev_buf, sizeof(dev_buf), path, device);
299 system_set_sysctl(dev_buf, val);
300 }
301
302 static void system_set_disable_ipv6(struct device *dev, const char *val)
303 {
304 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
305 }
306
307 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
308 {
309 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/seg6_enabled", dev->ifname, val);
310 }
311
312 static void system_set_rpfilter(struct device *dev, const char *val)
313 {
314 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
315 }
316
317 static void system_set_acceptlocal(struct device *dev, const char *val)
318 {
319 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
320 }
321
322 static void system_set_igmpversion(struct device *dev, const char *val)
323 {
324 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
325 }
326
327 static void system_set_mldversion(struct device *dev, const char *val)
328 {
329 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
330 }
331
332 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
333 {
334 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
335 }
336
337 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
338 {
339 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
340 }
341
342 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
343 {
344 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
345 }
346
347 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
348 {
349 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
350 }
351
352 static void system_set_neigh4locktime(struct device *dev, const char *val)
353 {
354 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
355 }
356
357 static void system_set_dadtransmits(struct device *dev, const char *val)
358 {
359 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
360 }
361
362 static void system_set_sendredirects(struct device *dev, const char *val)
363 {
364 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
365 }
366
367 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
368 {
369 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/drop_unicast_in_l2_multicast", dev->ifname, val);
370 }
371
372 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
373 {
374 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/drop_unicast_in_l2_multicast", dev->ifname, val);
375 }
376
377 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
378 {
379 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/drop_gratuitous_arp", dev->ifname, val);
380 }
381
382 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
383 {
384 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/drop_unsolicited_na", dev->ifname, val);
385 }
386
387 static void system_set_arp_accept(struct device *dev, const char *val)
388 {
389 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/arp_accept", dev->ifname, val);
390 }
391
392 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
393 {
394 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
395 }
396
397 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
398 {
399 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
400 }
401
402 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
403 {
404 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
405 }
406
407 static void system_bridge_set_isolated(struct device *dev, const char *val)
408 {
409 system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val);
410 }
411
412 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
413 {
414 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
415 "/sys/class/net/%s/brport/multicast_router",
416 dev->ifname, val);
417 }
418
419 static void system_bridge_set_robustness(struct device *dev, const char *val)
420 {
421 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
422 dev->ifname, val);
423 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
424 dev->ifname, val);
425 }
426
427 static void system_bridge_set_query_interval(struct device *dev, const char *val)
428 {
429 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
430 dev->ifname, val);
431 }
432
433 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
434 {
435 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
436 dev->ifname, val);
437 }
438
439 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
440 {
441 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
442 dev->ifname, val);
443 }
444
445 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
446 {
447 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
448 dev->ifname, val);
449 }
450
451 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
452 {
453 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
454 dev->ifname, val);
455 }
456
457 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
458 {
459 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
460 dev->ifname, val);
461 }
462
463 void system_bridge_set_stp_state(struct device *dev, bool val)
464 {
465 const char *valstr = val ? "1" : "0";
466
467 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/stp_state", dev->ifname, valstr);
468 }
469
470 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
471 {
472 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/forward_delay", dev->ifname, val);
473 }
474
475 static void system_bridge_set_priority(struct device *dev, const char *val)
476 {
477 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/priority", dev->ifname, val);
478 }
479
480 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
481 {
482 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/ageing_time", dev->ifname, val);
483 }
484
485 static void system_bridge_set_hello_time(struct device *dev, const char *val)
486 {
487 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hello_time", dev->ifname, val);
488 }
489
490 static void system_bridge_set_max_age(struct device *dev, const char *val)
491 {
492 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/max_age", dev->ifname, val);
493 }
494
495 static void system_bridge_set_learning(struct device *dev, const char *val)
496 {
497 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
498 }
499
500 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
501 {
502 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
503 }
504
505 static void system_bridge_set_vlan_filtering(struct device *dev, const char *val)
506 {
507 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/vlan_filtering", dev->ifname, val);
508 }
509
510 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
511 {
512 int fd = -1, ret = -1;
513
514 fd = open(path, O_RDONLY);
515 if (fd < 0)
516 goto out;
517
518 ssize_t len = read(fd, buf, buf_sz - 1);
519 if (len < 0)
520 goto out;
521
522 ret = buf[len] = 0;
523
524 out:
525 if (fd >= 0)
526 close(fd);
527
528 return ret;
529 }
530
531 static int
532 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
533 {
534 snprintf(dev_buf, sizeof(dev_buf), path, device);
535 return system_get_sysctl(dev_buf, buf, buf_sz);
536 }
537
538 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
539 {
540 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
541 dev->ifname, buf, buf_sz);
542 }
543
544 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
545 {
546 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/seg6_enabled",
547 dev->ifname, buf, buf_sz);
548 }
549
550 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
551 {
552 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
553 dev->ifname, buf, buf_sz);
554 }
555
556 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
557 {
558 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
559 dev->ifname, buf, buf_sz);
560 }
561
562 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
563 {
564 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
565 dev->ifname, buf, buf_sz);
566 }
567
568 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
569 {
570 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
571 dev->ifname, buf, buf_sz);
572 }
573
574 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
575 {
576 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
577 dev->ifname, buf, buf_sz);
578 }
579
580 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
581 {
582 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
583 dev->ifname, buf, buf_sz);
584 }
585
586 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
587 {
588 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
589 dev->ifname, buf, buf_sz);
590 }
591
592 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
593 {
594 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
595 dev->ifname, buf, buf_sz);
596 }
597
598 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
599 {
600 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
601 dev->ifname, buf, buf_sz);
602 }
603
604 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
605 {
606 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
607 dev->ifname, buf, buf_sz);
608 }
609
610 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
611 {
612 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
613 dev->ifname, buf, buf_sz);
614 }
615
616
617 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
618 {
619 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/drop_unicast_in_l2_multicast",
620 dev->ifname, buf, buf_sz);
621 }
622
623 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
624 {
625 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/drop_unicast_in_l2_multicast",
626 dev->ifname, buf, buf_sz);
627 }
628
629 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
630 {
631 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/drop_gratuitous_arp",
632 dev->ifname, buf, buf_sz);
633 }
634
635 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
636 {
637 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/drop_unsolicited_na",
638 dev->ifname, buf, buf_sz);
639 }
640
641 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
642 {
643 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/arp_accept",
644 dev->ifname, buf, buf_sz);
645 }
646
647 /* Evaluate netlink messages */
648 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
649 {
650 struct nlmsghdr *nh = nlmsg_hdr(msg);
651 struct nlattr *nla[__IFLA_MAX];
652 int link_state = 0;
653 char buf[10];
654
655 if (nh->nlmsg_type != RTM_NEWLINK)
656 goto out;
657
658 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
659 if (!nla[IFLA_IFNAME])
660 goto out;
661
662 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
663 if (!dev)
664 goto out;
665
666 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
667 link_state = strtoul(buf, NULL, 0);
668
669 if (dev->type == &simple_device_type)
670 device_set_present(dev, true);
671
672 device_set_link(dev, link_state ? true : false);
673
674 out:
675 return 0;
676 }
677
678 static void
679 handle_hotplug_msg(char *data, int size)
680 {
681 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
682 char *cur, *end, *sep;
683 int skip;
684 bool add;
685
686 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
687 add = true;
688 else if (!strncmp(data, "remove@", 7))
689 add = false;
690 else
691 return;
692
693 skip = strlen(data) + 1;
694 end = data + size;
695
696 for (cur = data + skip; cur < end; cur += skip) {
697 skip = strlen(cur) + 1;
698
699 sep = strchr(cur, '=');
700 if (!sep)
701 continue;
702
703 *sep = 0;
704 if (!strcmp(cur, "INTERFACE"))
705 interface = sep + 1;
706 else if (!strcmp(cur, "SUBSYSTEM")) {
707 subsystem = sep + 1;
708 if (strcmp(subsystem, "net") != 0)
709 return;
710 } else if (!strcmp(cur, "DEVPATH_OLD")) {
711 interface_old = strrchr(sep + 1, '/');
712 if (interface_old)
713 interface_old++;
714 }
715 }
716
717 if (!subsystem || !interface)
718 return;
719
720 if (interface_old)
721 device_hotplug_event(interface_old, false);
722
723 device_hotplug_event(interface, add);
724 }
725
726 static void
727 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
728 {
729 struct event_socket *ev = container_of(u, struct event_socket, uloop);
730 struct sockaddr_nl nla;
731 unsigned char *buf = NULL;
732 int size;
733 int err;
734 socklen_t errlen = sizeof(err);
735
736 if (!u->error) {
737 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
738 if (nla.nl_pid == 0)
739 handle_hotplug_msg((char *) buf, size);
740
741 free(buf);
742 }
743 return;
744 }
745
746 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
747 goto abort;
748
749 switch(err) {
750 case ENOBUFS:
751 /* Increase rx buffer size on netlink socket */
752 ev->bufsize *= 2;
753 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
754 goto abort;
755 break;
756
757 default:
758 goto abort;
759 }
760 u->error = false;
761 return;
762
763 abort:
764 uloop_fd_delete(&ev->uloop);
765 return;
766 }
767
768 static int system_rtnl_call(struct nl_msg *msg)
769 {
770 int ret;
771
772 ret = nl_send_auto_complete(sock_rtnl, msg);
773 nlmsg_free(msg);
774
775 if (ret < 0)
776 return ret;
777
778 return nl_wait_for_ack(sock_rtnl);
779 }
780
781 int system_bridge_delbr(struct device *bridge)
782 {
783 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
784 }
785
786 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
787 {
788 struct ifreq ifr;
789
790 memset(&ifr, 0, sizeof(ifr));
791 if (dev)
792 ifr.ifr_ifindex = dev->ifindex;
793 else
794 ifr.ifr_data = data;
795 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
796 return ioctl(sock_ioctl, cmd, &ifr);
797 }
798
799 static bool system_is_bridge(const char *name, char *buf, int buflen)
800 {
801 struct stat st;
802
803 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
804 if (stat(buf, &st) < 0)
805 return false;
806
807 return true;
808 }
809
810 static char *system_get_bridge(const char *name, char *buf, int buflen)
811 {
812 char *path;
813 ssize_t len = -1;
814 glob_t gl;
815
816 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
817 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
818 return NULL;
819
820 if (gl.gl_pathc > 0)
821 len = readlink(gl.gl_pathv[0], buf, buflen);
822
823 globfree(&gl);
824
825 if (len < 0)
826 return NULL;
827
828 buf[len] = 0;
829 path = strrchr(buf, '/');
830 if (!path)
831 return NULL;
832
833 return path + 1;
834 }
835
836 static void
837 system_bridge_set_wireless(struct device *bridge, struct device *dev)
838 {
839 bool mcast_to_ucast = dev->wireless_ap;
840 bool hairpin = true;
841
842 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
843 !bridge->settings.multicast_to_unicast)
844 mcast_to_ucast = false;
845
846 if (!mcast_to_ucast || dev->wireless_isolate)
847 hairpin = false;
848
849 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
850 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
851 }
852
853 int system_bridge_addif(struct device *bridge, struct device *dev)
854 {
855 char buf[64];
856 char *oldbr;
857 int tries = 0;
858 int ret;
859
860 retry:
861 ret = 0;
862 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
863 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
864 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
865 tries++;
866 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
867 dev->ifname, bridge->ifname, tries, strerror(errno));
868 if (tries <= 3)
869 goto retry;
870 }
871
872 if (dev->wireless)
873 system_bridge_set_wireless(bridge, dev);
874
875 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
876 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
877 system_bridge_set_multicast_router(dev, buf, false);
878 }
879
880 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
881 dev->settings.multicast_fast_leave)
882 system_bridge_set_multicast_fast_leave(dev, "1");
883
884 if (dev->settings.flags & DEV_OPT_LEARNING &&
885 !dev->settings.learning)
886 system_bridge_set_learning(dev, "0");
887
888 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
889 !dev->settings.unicast_flood)
890 system_bridge_set_unicast_flood(dev, "0");
891
892 if (dev->settings.flags & DEV_OPT_ISOLATE &&
893 dev->settings.isolate)
894 system_bridge_set_isolated(dev, "1");
895
896 return ret;
897 }
898
899 int system_bridge_delif(struct device *bridge, struct device *dev)
900 {
901 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
902 }
903
904 int system_bridge_vlan(const char *iface, uint16_t vid, bool add, unsigned int vflags)
905 {
906 struct ifinfomsg ifi = { .ifi_family = PF_BRIDGE, };
907 struct bridge_vlan_info vinfo = { .vid = vid, };
908 unsigned short flags = 0;
909 struct nlattr *afspec;
910 struct nl_msg *nlm;
911 int ret = 0;
912
913 ifi.ifi_index = if_nametoindex(iface);
914 if (!ifi.ifi_index)
915 return -1;
916
917 nlm = nlmsg_alloc_simple(add ? RTM_SETLINK : RTM_DELLINK, NLM_F_REQUEST);
918 if (!nlm)
919 return -1;
920
921 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
922
923 if (vflags & BRVLAN_F_SELF)
924 flags |= BRIDGE_FLAGS_SELF;
925
926 if (vflags & BRVLAN_F_PVID)
927 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
928
929 if (vflags & BRVLAN_F_UNTAGGED)
930 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
931
932 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
933 if (!afspec) {
934 ret = -ENOMEM;
935 goto failure;
936 }
937
938 if (flags)
939 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
940
941 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
942 nla_nest_end(nlm, afspec);
943
944 return system_rtnl_call(nlm);
945
946 failure:
947 nlmsg_free(nlm);
948 return ret;
949 }
950
951 int system_if_resolve(struct device *dev)
952 {
953 struct ifreq ifr;
954
955 memset(&ifr, 0, sizeof(ifr));
956 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
957 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
958 return ifr.ifr_ifindex;
959 else
960 return 0;
961 }
962
963 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
964 {
965 struct ifreq ifr;
966
967 memset(&ifr, 0, sizeof(ifr));
968 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
969 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
970 return -1;
971
972 ifr.ifr_flags |= add;
973 ifr.ifr_flags &= ~rem;
974 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
975 }
976
977 struct clear_data {
978 struct nl_msg *msg;
979 struct device *dev;
980 int type;
981 int size;
982 int af;
983 };
984
985
986 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
987 {
988 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
989
990 return ifa->ifa_index == ifindex;
991 }
992
993 static bool check_route(struct nlmsghdr *hdr, int ifindex)
994 {
995 struct rtmsg *r = NLMSG_DATA(hdr);
996 struct nlattr *tb[__RTA_MAX];
997
998 if (r->rtm_protocol == RTPROT_KERNEL &&
999 r->rtm_family == AF_INET6)
1000 return false;
1001
1002 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1003 if (!tb[RTA_OIF])
1004 return false;
1005
1006 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1007 }
1008
1009 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1010 {
1011 return true;
1012 }
1013
1014 static int cb_clear_event(struct nl_msg *msg, void *arg)
1015 {
1016 struct clear_data *clr = arg;
1017 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1018 bool (*cb)(struct nlmsghdr *, int ifindex);
1019 int type, ret;
1020
1021 switch(clr->type) {
1022 case RTM_GETADDR:
1023 type = RTM_DELADDR;
1024 if (hdr->nlmsg_type != RTM_NEWADDR)
1025 return NL_SKIP;
1026
1027 cb = check_ifaddr;
1028 break;
1029 case RTM_GETROUTE:
1030 type = RTM_DELROUTE;
1031 if (hdr->nlmsg_type != RTM_NEWROUTE)
1032 return NL_SKIP;
1033
1034 cb = check_route;
1035 break;
1036 case RTM_GETRULE:
1037 type = RTM_DELRULE;
1038 if (hdr->nlmsg_type != RTM_NEWRULE)
1039 return NL_SKIP;
1040
1041 cb = check_rule;
1042 break;
1043 default:
1044 return NL_SKIP;
1045 }
1046
1047 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1048 return NL_SKIP;
1049
1050 if (type == RTM_DELRULE)
1051 D(SYSTEM, "Remove a rule\n");
1052 else
1053 D(SYSTEM, "Remove %s from device %s\n",
1054 type == RTM_DELADDR ? "an address" : "a route",
1055 clr->dev->ifname);
1056
1057 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1058 hdr = nlmsg_hdr(clr->msg);
1059 hdr->nlmsg_type = type;
1060 hdr->nlmsg_flags = NLM_F_REQUEST;
1061
1062 nl_socket_disable_auto_ack(sock_rtnl);
1063 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1064 if (ret < 0) {
1065 if (type == RTM_DELRULE)
1066 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1067 else
1068 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1069 type == RTM_DELADDR ? "an address" : "a route",
1070 clr->dev->ifname, ret);
1071 }
1072
1073 nl_socket_enable_auto_ack(sock_rtnl);
1074
1075 return NL_SKIP;
1076 }
1077
1078 static int
1079 cb_finish_event(struct nl_msg *msg, void *arg)
1080 {
1081 int *pending = arg;
1082 *pending = 0;
1083 return NL_STOP;
1084 }
1085
1086 static int
1087 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1088 {
1089 int *pending = arg;
1090 *pending = err->error;
1091 return NL_STOP;
1092 }
1093
1094 static void
1095 system_if_clear_entries(struct device *dev, int type, int af)
1096 {
1097 struct clear_data clr;
1098 struct nl_cb *cb;
1099 struct rtmsg rtm = {
1100 .rtm_family = af,
1101 .rtm_flags = RTM_F_CLONED,
1102 };
1103 int flags = NLM_F_DUMP;
1104 int pending = 1;
1105
1106 clr.af = af;
1107 clr.dev = dev;
1108 clr.type = type;
1109 switch (type) {
1110 case RTM_GETADDR:
1111 case RTM_GETRULE:
1112 clr.size = sizeof(struct rtgenmsg);
1113 break;
1114 case RTM_GETROUTE:
1115 clr.size = sizeof(struct rtmsg);
1116 break;
1117 default:
1118 return;
1119 }
1120
1121 cb = nl_cb_alloc(NL_CB_DEFAULT);
1122 if (!cb)
1123 return;
1124
1125 clr.msg = nlmsg_alloc_simple(type, flags);
1126 if (!clr.msg)
1127 goto out;
1128
1129 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1130 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1131 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1132 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1133
1134 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1135 goto free;
1136
1137 while (pending > 0)
1138 nl_recvmsgs(sock_rtnl, cb);
1139
1140 free:
1141 nlmsg_free(clr.msg);
1142 out:
1143 nl_cb_put(cb);
1144 }
1145
1146 /*
1147 * Clear bridge (membership) state and bring down device
1148 */
1149 void system_if_clear_state(struct device *dev)
1150 {
1151 static char buf[256];
1152 char *bridge;
1153 device_set_ifindex(dev, system_if_resolve(dev));
1154
1155 if (dev->external || !dev->ifindex)
1156 return;
1157
1158 system_if_flags(dev->ifname, 0, IFF_UP);
1159
1160 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
1161 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1162 system_bridge_delbr(dev);
1163 return;
1164 }
1165
1166 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1167 if (bridge) {
1168 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1169 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1170 }
1171
1172 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1173 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1174 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1175 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1176 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1177 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1178 system_set_disable_ipv6(dev, "0");
1179 }
1180
1181 static inline unsigned long
1182 sec_to_jiffies(int val)
1183 {
1184 return (unsigned long) val * 100;
1185 }
1186
1187 static void system_bridge_conf_multicast_deps(struct device *bridge,
1188 struct bridge_config *cfg,
1189 char *buf,
1190 int buf_len)
1191 {
1192 int val;
1193
1194 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1195 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1196 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1197 val = cfg->robustness * cfg->query_interval +
1198 cfg->query_response_interval;
1199
1200 snprintf(buf, buf_len, "%i", val);
1201 system_bridge_set_membership_interval(bridge, buf);
1202
1203 val = cfg->robustness * cfg->query_interval +
1204 cfg->query_response_interval / 2;
1205
1206 snprintf(buf, buf_len, "%i", val);
1207 system_bridge_set_other_querier_timeout(bridge, buf);
1208 }
1209
1210 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1211 val = cfg->query_interval / 4;
1212
1213 snprintf(buf, buf_len, "%i", val);
1214 system_bridge_set_startup_query_interval(bridge, buf);
1215 }
1216 }
1217
1218 static void system_bridge_conf_multicast(struct device *bridge,
1219 struct bridge_config *cfg,
1220 char *buf,
1221 int buf_len)
1222 {
1223 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1224 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1225
1226 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1227 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1228
1229 snprintf(buf, buf_len, "%i", cfg->hash_max);
1230 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1231 bridge->ifname, buf);
1232
1233 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1234 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1235 system_bridge_set_multicast_router(bridge, buf, true);
1236 }
1237
1238 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1239 snprintf(buf, buf_len, "%i", cfg->robustness);
1240 system_bridge_set_robustness(bridge, buf);
1241 }
1242
1243 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1244 snprintf(buf, buf_len, "%i", cfg->query_interval);
1245 system_bridge_set_query_interval(bridge, buf);
1246 }
1247
1248 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1249 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1250 system_bridge_set_query_response_interval(bridge, buf);
1251 }
1252
1253 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1254 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1255 system_bridge_set_last_member_interval(bridge, buf);
1256 }
1257
1258 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1259 }
1260
1261 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1262 {
1263 char buf[64];
1264
1265 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1266 return -1;
1267
1268 system_bridge_set_stp_state(bridge, cfg->stp);
1269
1270 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1271 system_bridge_set_forward_delay(bridge, buf);
1272
1273 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1274 system_bridge_set_vlan_filtering(bridge, cfg->vlan_filtering ? "1" : "0");
1275
1276 snprintf(buf, sizeof(buf), "%d", cfg->priority);
1277 system_bridge_set_priority(bridge, buf);
1278
1279 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1280 system_bridge_set_hello_time(bridge, buf);
1281
1282 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1283 system_bridge_set_max_age(bridge, buf);
1284
1285 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1286 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1287 system_bridge_set_ageing_time(bridge, buf);
1288 }
1289
1290 return 0;
1291 }
1292
1293 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1294 {
1295 struct nl_msg *msg;
1296 struct nlattr *linkinfo, *data;
1297 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1298 int i, rv;
1299 static const struct {
1300 const char *name;
1301 enum macvlan_mode val;
1302 } modes[] = {
1303 { "private", MACVLAN_MODE_PRIVATE },
1304 { "vepa", MACVLAN_MODE_VEPA },
1305 { "bridge", MACVLAN_MODE_BRIDGE },
1306 { "passthru", MACVLAN_MODE_PASSTHRU },
1307 };
1308
1309 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1310
1311 if (!msg)
1312 return -1;
1313
1314 nlmsg_append(msg, &iim, sizeof(iim), 0);
1315
1316 if (cfg->flags & MACVLAN_OPT_MACADDR)
1317 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1318 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1319 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1320
1321 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1322 goto nla_put_failure;
1323
1324 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1325
1326 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1327 goto nla_put_failure;
1328
1329 if (cfg->mode) {
1330 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1331 if (strcmp(cfg->mode, modes[i].name) != 0)
1332 continue;
1333
1334 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1335 break;
1336 }
1337 }
1338
1339 nla_nest_end(msg, data);
1340 nla_nest_end(msg, linkinfo);
1341
1342 rv = system_rtnl_call(msg);
1343 if (rv)
1344 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1345
1346 return rv;
1347
1348 nla_put_failure:
1349 nlmsg_free(msg);
1350 return -ENOMEM;
1351 }
1352
1353 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1354 {
1355 struct nl_msg *msg;
1356 struct ifinfomsg iim = {
1357 .ifi_family = AF_UNSPEC,
1358 };
1359
1360 if (!dev)
1361 return -1;
1362
1363 iim.ifi_index = system_if_resolve(dev);
1364 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1365
1366 if (!msg)
1367 return -1;
1368
1369 nlmsg_append(msg, &iim, sizeof(iim), 0);
1370 if (target_ifname)
1371 nla_put_string(msg, IFLA_IFNAME, target_ifname);
1372
1373 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1374 return system_rtnl_call(msg);
1375 }
1376
1377 static int system_link_del(const char *ifname)
1378 {
1379 struct nl_msg *msg;
1380 struct ifinfomsg iim = {
1381 .ifi_family = AF_UNSPEC,
1382 .ifi_index = 0,
1383 };
1384
1385 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1386
1387 if (!msg)
1388 return -1;
1389
1390 nlmsg_append(msg, &iim, sizeof(iim), 0);
1391 nla_put_string(msg, IFLA_IFNAME, ifname);
1392 return system_rtnl_call(msg);
1393 }
1394
1395 int system_macvlan_del(struct device *macvlan)
1396 {
1397 return system_link_del(macvlan->ifname);
1398 }
1399
1400 int system_netns_open(const pid_t target_ns)
1401 {
1402 char pid_net_path[PATH_MAX];
1403
1404 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1405
1406 return open(pid_net_path, O_RDONLY);
1407 }
1408
1409 int system_netns_set(int netns_fd)
1410 {
1411 return setns(netns_fd, CLONE_NEWNET);
1412 }
1413
1414 int system_veth_add(struct device *veth, struct veth_config *cfg)
1415 {
1416 struct nl_msg *msg;
1417 struct ifinfomsg empty_iim = {};
1418 struct nlattr *linkinfo, *data, *veth_info;
1419 int rv;
1420
1421 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1422
1423 if (!msg)
1424 return -1;
1425
1426 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1427
1428 if (cfg->flags & VETH_OPT_MACADDR)
1429 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1430 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1431
1432 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1433 goto nla_put_failure;
1434
1435 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1436
1437 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1438 goto nla_put_failure;
1439
1440 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1441 goto nla_put_failure;
1442
1443 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1444
1445 if (cfg->flags & VETH_OPT_PEER_NAME)
1446 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1447 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1448 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1449
1450 nla_nest_end(msg, veth_info);
1451 nla_nest_end(msg, data);
1452 nla_nest_end(msg, linkinfo);
1453
1454 rv = system_rtnl_call(msg);
1455 if (rv) {
1456 if (cfg->flags & VETH_OPT_PEER_NAME)
1457 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1458 else
1459 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1460 }
1461
1462 return rv;
1463
1464 nla_put_failure:
1465 nlmsg_free(msg);
1466 return -ENOMEM;
1467 }
1468
1469 int system_veth_del(struct device *veth)
1470 {
1471 return system_link_del(veth->ifname);
1472 }
1473
1474 static int system_vlan(struct device *dev, int id)
1475 {
1476 struct vlan_ioctl_args ifr = {
1477 .cmd = SET_VLAN_NAME_TYPE_CMD,
1478 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1479 };
1480
1481 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1482 return -1;
1483
1484 if (id < 0) {
1485 ifr.cmd = DEL_VLAN_CMD;
1486 ifr.u.VID = 0;
1487 } else {
1488 ifr.cmd = ADD_VLAN_CMD;
1489 ifr.u.VID = id;
1490 }
1491 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1492 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1493 }
1494
1495 int system_vlan_add(struct device *dev, int id)
1496 {
1497 return system_vlan(dev, id);
1498 }
1499
1500 int system_vlan_del(struct device *dev)
1501 {
1502 return system_vlan(dev, -1);
1503 }
1504
1505 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1506 {
1507 struct nl_msg *msg;
1508 struct nlattr *linkinfo, *data, *qos;
1509 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1510 struct vlan_qos_mapping *elem;
1511 struct ifla_vlan_qos_mapping nl_qos_map;
1512 int rv;
1513
1514 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1515
1516 if (!msg)
1517 return -1;
1518
1519 nlmsg_append(msg, &iim, sizeof(iim), 0);
1520 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1521 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1522
1523 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1524 goto nla_put_failure;
1525
1526 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1527
1528 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1529 goto nla_put_failure;
1530
1531 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1532
1533 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1534 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1535 #else
1536 if(cfg->proto == VLAN_PROTO_8021AD)
1537 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);
1538 #endif
1539
1540 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1541 goto nla_put_failure;
1542
1543 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1544 nl_qos_map.from = elem->from;
1545 nl_qos_map.to = elem->to;
1546 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1547 }
1548 nla_nest_end(msg, qos);
1549
1550 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1551 goto nla_put_failure;
1552
1553 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1554 nl_qos_map.from = elem->from;
1555 nl_qos_map.to = elem->to;
1556 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1557 }
1558 nla_nest_end(msg, qos);
1559
1560 nla_nest_end(msg, data);
1561 nla_nest_end(msg, linkinfo);
1562
1563 rv = system_rtnl_call(msg);
1564 if (rv)
1565 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1566
1567 return rv;
1568
1569 nla_put_failure:
1570 nlmsg_free(msg);
1571 return -ENOMEM;
1572 }
1573
1574 int system_vlandev_del(struct device *vlandev)
1575 {
1576 return system_link_del(vlandev->ifname);
1577 }
1578
1579 static void
1580 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1581 {
1582 struct ethtool_cmd ecmd = {
1583 .cmd = ETHTOOL_GSET,
1584 };
1585 struct ifreq ifr = {
1586 .ifr_data = (caddr_t)&ecmd,
1587 };
1588 static const struct {
1589 int speed;
1590 uint8_t bit_half;
1591 uint8_t bit_full;
1592 } speed_mask[] = {
1593 { 10, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT },
1594 { 100, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT },
1595 { 1000, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT },
1596 };
1597 uint32_t adv;
1598 int i;
1599
1600 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1601
1602 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
1603 return;
1604
1605 adv = ecmd.supported;
1606 for (i = 0; i < ARRAY_SIZE(speed_mask); i++) {
1607 if (s->flags & DEV_OPT_DUPLEX) {
1608 int bit = s->duplex ? speed_mask[i].bit_half : speed_mask[i].bit_full;
1609 adv &= ~(1 << bit);
1610 }
1611
1612 if (!(s->flags & DEV_OPT_SPEED) ||
1613 s->speed == speed_mask[i].speed)
1614 continue;
1615
1616 adv &= ~(1 << speed_mask[i].bit_full);
1617 adv &= ~(1 << speed_mask[i].bit_half);
1618 }
1619
1620
1621 if (ecmd.autoneg && ecmd.advertising == adv)
1622 return;
1623
1624 ecmd.autoneg = 1;
1625 ecmd.advertising = adv;
1626 ecmd.cmd = ETHTOOL_SSET;
1627 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1628 }
1629
1630 void
1631 system_if_get_settings(struct device *dev, struct device_settings *s)
1632 {
1633 struct ifreq ifr;
1634 char buf[10];
1635
1636 memset(&ifr, 0, sizeof(ifr));
1637 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1638
1639 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1640 s->mtu = ifr.ifr_mtu;
1641 s->flags |= DEV_OPT_MTU;
1642 }
1643
1644 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1645 if (s->mtu6 > 0)
1646 s->flags |= DEV_OPT_MTU6;
1647
1648 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1649 s->txqueuelen = ifr.ifr_qlen;
1650 s->flags |= DEV_OPT_TXQUEUELEN;
1651 }
1652
1653 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1654 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1655 s->flags |= DEV_OPT_MACADDR;
1656 }
1657
1658 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1659 s->ipv6 = !strtoul(buf, NULL, 0);
1660 s->flags |= DEV_OPT_IPV6;
1661 }
1662
1663 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1664 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1665 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1666 }
1667
1668 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1669 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1670 s->flags |= DEV_OPT_PROMISC;
1671
1672 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1673 s->flags |= DEV_OPT_MULTICAST;
1674 }
1675
1676 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1677 s->rpfilter = strtoul(buf, NULL, 0);
1678 s->flags |= DEV_OPT_RPFILTER;
1679 }
1680
1681 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1682 s->acceptlocal = strtoul(buf, NULL, 0);
1683 s->flags |= DEV_OPT_ACCEPTLOCAL;
1684 }
1685
1686 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1687 s->igmpversion = strtoul(buf, NULL, 0);
1688 s->flags |= DEV_OPT_IGMPVERSION;
1689 }
1690
1691 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1692 s->mldversion = strtoul(buf, NULL, 0);
1693 s->flags |= DEV_OPT_MLDVERSION;
1694 }
1695
1696 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1697 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1698 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1699 }
1700
1701 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1702 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1703 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1704 }
1705
1706 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1707 s->neigh4locktime = strtol(buf, NULL, 0);
1708 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1709 }
1710
1711 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1712 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1713 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1714 }
1715
1716 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1717 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1718 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1719 }
1720
1721 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1722 s->dadtransmits = strtoul(buf, NULL, 0);
1723 s->flags |= DEV_OPT_DADTRANSMITS;
1724 }
1725
1726 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1727 s->sendredirects = strtoul(buf, NULL, 0);
1728 s->flags |= DEV_OPT_SENDREDIRECTS;
1729 }
1730
1731 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1732 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1733 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1734 }
1735
1736 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1737 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1738 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1739 }
1740
1741 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1742 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1743 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1744 }
1745
1746 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1747 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1748 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1749 }
1750
1751 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1752 s->arp_accept = strtoul(buf, NULL, 0);
1753 s->flags |= DEV_OPT_ARP_ACCEPT;
1754 }
1755 }
1756
1757 void
1758 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1759 {
1760 struct ifreq ifr;
1761 char buf[12];
1762
1763 apply_mask &= s->flags;
1764
1765 memset(&ifr, 0, sizeof(ifr));
1766 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1767 if (apply_mask & DEV_OPT_MTU) {
1768 ifr.ifr_mtu = s->mtu;
1769 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1770 s->flags &= ~DEV_OPT_MTU;
1771 }
1772 if (apply_mask & DEV_OPT_MTU6) {
1773 system_update_ipv6_mtu(dev, s->mtu6);
1774 }
1775 if (apply_mask & DEV_OPT_TXQUEUELEN) {
1776 ifr.ifr_qlen = s->txqueuelen;
1777 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1778 s->flags &= ~DEV_OPT_TXQUEUELEN;
1779 }
1780 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
1781 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1782 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1783 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1784 s->flags &= ~DEV_OPT_MACADDR;
1785 }
1786 if (apply_mask & DEV_OPT_IPV6)
1787 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1788 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
1789 struct device dummy = {
1790 .ifname = "all",
1791 };
1792 bool ip6segmentrouting = device_check_ip6segmentrouting();
1793
1794 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
1795 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
1796 }
1797 if (apply_mask & DEV_OPT_PROMISC) {
1798 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1799 !s->promisc ? IFF_PROMISC : 0) < 0)
1800 s->flags &= ~DEV_OPT_PROMISC;
1801 }
1802 if (apply_mask & DEV_OPT_RPFILTER) {
1803 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1804 system_set_rpfilter(dev, buf);
1805 }
1806 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
1807 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1808 if (apply_mask & DEV_OPT_IGMPVERSION) {
1809 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1810 system_set_igmpversion(dev, buf);
1811 }
1812 if (apply_mask & DEV_OPT_MLDVERSION) {
1813 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1814 system_set_mldversion(dev, buf);
1815 }
1816 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
1817 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1818 system_set_neigh4reachabletime(dev, buf);
1819 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1820 system_set_neigh6reachabletime(dev, buf);
1821 }
1822 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
1823 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1824 system_set_neigh4locktime(dev, buf);
1825 }
1826 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
1827 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1828 system_set_neigh4gcstaletime(dev, buf);
1829 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1830 system_set_neigh6gcstaletime(dev, buf);
1831 }
1832 if (apply_mask & DEV_OPT_DADTRANSMITS) {
1833 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1834 system_set_dadtransmits(dev, buf);
1835 }
1836 if (apply_mask & DEV_OPT_MULTICAST) {
1837 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1838 !s->multicast ? IFF_MULTICAST : 0) < 0)
1839 s->flags &= ~DEV_OPT_MULTICAST;
1840 }
1841 if (apply_mask & DEV_OPT_SENDREDIRECTS)
1842 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1843 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1844 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
1845 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1846 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
1847 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
1848 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
1849 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
1850 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
1851 if (apply_mask & DEV_OPT_ARP_ACCEPT)
1852 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
1853 system_set_ethtool_settings(dev, s);
1854 }
1855
1856 int system_if_up(struct device *dev)
1857 {
1858 return system_if_flags(dev->ifname, IFF_UP, 0);
1859 }
1860
1861 int system_if_down(struct device *dev)
1862 {
1863 return system_if_flags(dev->ifname, 0, IFF_UP);
1864 }
1865
1866 struct if_check_data {
1867 struct device *dev;
1868 int pending;
1869 int ret;
1870 };
1871
1872 #ifndef IFF_LOWER_UP
1873 #define IFF_LOWER_UP 0x10000
1874 #endif
1875
1876 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1877 {
1878 struct nlmsghdr *nh = nlmsg_hdr(msg);
1879 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1880 struct if_check_data *chk = (struct if_check_data *)arg;
1881
1882 if (nh->nlmsg_type != RTM_NEWLINK)
1883 return NL_SKIP;
1884
1885 if (chk->dev->type == &simple_device_type)
1886 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1887 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1888
1889 return NL_OK;
1890 }
1891
1892 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1893 {
1894 struct if_check_data *chk = (struct if_check_data *)arg;
1895 chk->pending = 0;
1896 return NL_STOP;
1897 }
1898
1899 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1900 {
1901 struct if_check_data *chk = (struct if_check_data *)arg;
1902
1903 if (chk->dev->type == &simple_device_type)
1904 device_set_present(chk->dev, false);
1905 device_set_link(chk->dev, false);
1906 chk->pending = err->error;
1907
1908 return NL_STOP;
1909 }
1910
1911 struct bridge_vlan_check_data {
1912 struct device *check_dev;
1913 int ifindex;
1914 int ret;
1915 bool pending;
1916 };
1917
1918 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
1919 struct bridge_vlan_port *port,
1920 struct bridge_vlan_info *vinfo)
1921 {
1922 uint16_t flags = 0, diff, mask;
1923
1924 if (port->flags & BRVLAN_F_PVID)
1925 flags |= BRIDGE_VLAN_INFO_PVID;
1926 if (port->flags & BRVLAN_F_UNTAGGED)
1927 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1928
1929 diff = vinfo->flags ^ flags;
1930 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
1931 if (diff & mask) {
1932 data->ret = 1;
1933 data->pending = false;
1934 }
1935
1936 port->check = 1;
1937 }
1938
1939 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
1940 struct rtattr *attr)
1941 {
1942 struct bridge_vlan_hotplug_port *port;
1943 struct bridge_vlan_info *vinfo;
1944 struct bridge_vlan *vlan;
1945 struct rtattr *cur;
1946 int rem = RTA_PAYLOAD(attr);
1947 int i;
1948
1949 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1950 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
1951 continue;
1952
1953 vinfo = RTA_DATA(cur);
1954 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
1955 if (!vlan) {
1956 data->ret = 1;
1957 data->pending = false;
1958 return;
1959 }
1960
1961 for (i = 0; i < vlan->n_ports; i++)
1962 if (!vlan->ports[i].check)
1963 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
1964
1965 list_for_each_entry(port, &vlan->hotplug_ports, list)
1966 if (!port->port.check)
1967 bridge_vlan_check_port(data, &port->port, vinfo);
1968 }
1969 }
1970
1971 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
1972 {
1973 struct bridge_vlan_check_data *data = arg;
1974 struct nlmsghdr *nh = nlmsg_hdr(msg);
1975 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1976 struct rtattr *attr;
1977 int rem;
1978
1979 if (nh->nlmsg_type != RTM_NEWLINK)
1980 return NL_SKIP;
1981
1982 if (ifi->ifi_family != AF_BRIDGE)
1983 return NL_SKIP;
1984
1985 if (ifi->ifi_index != data->ifindex)
1986 return NL_SKIP;
1987
1988 attr = IFLA_RTA(ifi);
1989 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
1990 while (RTA_OK(attr, rem)) {
1991 if (attr->rta_type == IFLA_AF_SPEC)
1992 bridge_vlan_check_attr(data, attr);
1993
1994 attr = RTA_NEXT(attr, rem);
1995 }
1996
1997 return NL_SKIP;
1998 }
1999
2000 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2001 {
2002 struct bridge_vlan_check_data *data = arg;
2003 data->pending = false;
2004 return NL_STOP;
2005 }
2006
2007 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2008 {
2009 struct bridge_vlan_check_data *data = arg;
2010 data->pending = false;
2011 return NL_STOP;
2012 }
2013
2014 int system_bridge_vlan_check(struct device *dev, char *ifname)
2015 {
2016 struct bridge_vlan_check_data data = {
2017 .check_dev = dev,
2018 .ifindex = if_nametoindex(ifname),
2019 .ret = -1,
2020 .pending = true,
2021 };
2022 static struct ifinfomsg ifi = {
2023 .ifi_family = AF_BRIDGE
2024 };
2025 static struct rtattr ext_req = {
2026 .rta_type = IFLA_EXT_MASK,
2027 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2028 };
2029 uint32_t filter = RTEXT_FILTER_BRVLAN;
2030 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2031 struct bridge_vlan *vlan;
2032 struct nl_msg *msg;
2033 int i;
2034
2035 if (!data.ifindex)
2036 return 0;
2037
2038 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2039
2040 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2041 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2042 nlmsg_append(msg, &filter, sizeof(filter), 0))
2043 goto free;
2044
2045 vlist_for_each_element(&dev->vlans, vlan, node) {
2046 struct bridge_vlan_hotplug_port *port;
2047
2048 for (i = 0; i < vlan->n_ports; i++) {
2049 if (!strcmp(vlan->ports[i].ifname, ifname))
2050 vlan->ports[i].check = 0;
2051 else
2052 vlan->ports[i].check = -1;
2053 }
2054
2055 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2056 if (!strcmp(port->port.ifname, ifname))
2057 port->port.check = 0;
2058 else
2059 port->port.check = -1;
2060 }
2061 }
2062
2063 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2064 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2065 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2066 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2067
2068 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2069 goto free;
2070
2071 data.ret = 0;
2072 while (data.pending)
2073 nl_recvmsgs(sock_rtnl, cb);
2074
2075 vlist_for_each_element(&dev->vlans, vlan, node) {
2076 struct bridge_vlan_hotplug_port *port;
2077
2078 for (i = 0; i < vlan->n_ports; i++) {
2079 if (!vlan->ports[i].check) {
2080 data.ret = 1;
2081 break;
2082 }
2083 }
2084
2085 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2086 if (!port->port.check) {
2087 data.ret = 1;
2088 break;
2089 }
2090 }
2091 }
2092
2093 goto out;
2094
2095 free:
2096 nlmsg_free(msg);
2097 out:
2098 nl_cb_put(cb);
2099 return data.ret;
2100 }
2101
2102 int system_if_check(struct device *dev)
2103 {
2104 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2105 struct nl_msg *msg;
2106 struct ifinfomsg ifi = {
2107 .ifi_family = AF_UNSPEC,
2108 .ifi_index = 0,
2109 };
2110 struct if_check_data chk = {
2111 .dev = dev,
2112 .pending = 1,
2113 };
2114 int ret = 1;
2115
2116 if (!cb)
2117 return ret;
2118
2119 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2120 if (!msg)
2121 goto out;
2122
2123 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2124 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2125 goto free;
2126
2127 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2128 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2129 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2130
2131 ret = nl_send_auto_complete(sock_rtnl, msg);
2132 if (ret < 0)
2133 goto free;
2134
2135 while (chk.pending > 0)
2136 nl_recvmsgs(sock_rtnl, cb);
2137
2138 ret = chk.pending;
2139
2140 free:
2141 nlmsg_free(msg);
2142 out:
2143 nl_cb_put(cb);
2144 return ret;
2145 }
2146
2147 struct device *
2148 system_if_get_parent(struct device *dev)
2149 {
2150 char buf[64], *devname;
2151 int ifindex, iflink, len;
2152 FILE *f;
2153
2154 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
2155 f = fopen(buf, "r");
2156 if (!f)
2157 return NULL;
2158
2159 len = fread(buf, 1, sizeof(buf) - 1, f);
2160 fclose(f);
2161
2162 if (len <= 0)
2163 return NULL;
2164
2165 buf[len] = 0;
2166 iflink = strtoul(buf, NULL, 0);
2167 ifindex = system_if_resolve(dev);
2168 if (!iflink || iflink == ifindex)
2169 return NULL;
2170
2171 devname = if_indextoname(iflink, buf);
2172 if (!devname)
2173 return NULL;
2174
2175 return device_get(devname, true);
2176 }
2177
2178 static bool
2179 read_string_file(int dir_fd, const char *file, char *buf, int len)
2180 {
2181 bool ret = false;
2182 char *c;
2183 int fd;
2184
2185 fd = openat(dir_fd, file, O_RDONLY);
2186 if (fd < 0)
2187 return false;
2188
2189 retry:
2190 len = read(fd, buf, len - 1);
2191 if (len < 0) {
2192 if (errno == EINTR)
2193 goto retry;
2194 } else if (len > 0) {
2195 buf[len] = 0;
2196
2197 c = strchr(buf, '\n');
2198 if (c)
2199 *c = 0;
2200
2201 ret = true;
2202 }
2203
2204 close(fd);
2205
2206 return ret;
2207 }
2208
2209 static bool
2210 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2211 {
2212 char buf[64];
2213 bool ret = false;
2214
2215 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2216 if (ret)
2217 *val = strtoull(buf, NULL, 0);
2218
2219 return ret;
2220 }
2221
2222 /* Assume advertised flags == supported flags */
2223 static const struct {
2224 uint32_t mask;
2225 const char *name;
2226 } ethtool_link_modes[] = {
2227 { ADVERTISED_10baseT_Half, "10baseT-H" },
2228 { ADVERTISED_10baseT_Full, "10baseT-F" },
2229 { ADVERTISED_100baseT_Half, "100baseT-H" },
2230 { ADVERTISED_100baseT_Full, "100baseT-F" },
2231 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
2232 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
2233 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
2234 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
2235 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
2236 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
2237 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
2238 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
2239 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
2240 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
2241 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
2242 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
2243 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
2244 #ifdef ADVERTISED_56000baseKR4_Full
2245 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
2246 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
2247 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
2248 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
2249 #endif
2250 };
2251
2252 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
2253 {
2254 int i;
2255 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
2256 if (mask & ethtool_link_modes[i].mask)
2257 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
2258 }
2259 }
2260
2261 bool
2262 system_if_force_external(const char *ifname)
2263 {
2264 char buf[64];
2265 struct stat s;
2266
2267 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
2268 return stat(buf, &s) == 0;
2269 }
2270
2271 int
2272 system_if_dump_info(struct device *dev, struct blob_buf *b)
2273 {
2274 struct ethtool_cmd ecmd;
2275 struct ifreq ifr;
2276 char *s;
2277 void *c;
2278
2279 memset(&ecmd, 0, sizeof(ecmd));
2280 memset(&ifr, 0, sizeof(ifr));
2281 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2282 ifr.ifr_data = (caddr_t) &ecmd;
2283 ecmd.cmd = ETHTOOL_GSET;
2284
2285 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2286 c = blobmsg_open_array(b, "link-advertising");
2287 system_add_link_modes(b, ecmd.advertising);
2288 blobmsg_close_array(b, c);
2289
2290 c = blobmsg_open_array(b, "link-partner-advertising");
2291 system_add_link_modes(b, ecmd.lp_advertising);
2292 blobmsg_close_array(b, c);
2293
2294 c = blobmsg_open_array(b, "link-supported");
2295 system_add_link_modes(b, ecmd.supported);
2296 blobmsg_close_array(b, c);
2297
2298 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2299 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2300 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2301 blobmsg_add_string_buffer(b);
2302
2303 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2304 }
2305
2306 return 0;
2307 }
2308
2309 int
2310 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2311 {
2312 const char *const counters[] = {
2313 "collisions", "rx_frame_errors", "tx_compressed",
2314 "multicast", "rx_length_errors", "tx_dropped",
2315 "rx_bytes", "rx_missed_errors", "tx_errors",
2316 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2317 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2318 "rx_dropped", "tx_aborted_errors", "tx_packets",
2319 "rx_errors", "tx_bytes", "tx_window_errors",
2320 "rx_fifo_errors", "tx_carrier_errors",
2321 };
2322 char buf[64];
2323 int stats_dir;
2324 int i;
2325 uint64_t val = 0;
2326
2327 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
2328 stats_dir = open(buf, O_DIRECTORY);
2329 if (stats_dir < 0)
2330 return -1;
2331
2332 for (i = 0; i < ARRAY_SIZE(counters); i++)
2333 if (read_uint64_file(stats_dir, counters[i], &val))
2334 blobmsg_add_u64(b, counters[i], val);
2335
2336 close(stats_dir);
2337 return 0;
2338 }
2339
2340 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2341 {
2342 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2343 int alen = v4 ? 4 : 16;
2344 unsigned int flags = 0;
2345 struct ifaddrmsg ifa = {
2346 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2347 .ifa_prefixlen = addr->mask,
2348 .ifa_index = dev->ifindex,
2349 };
2350
2351 struct nl_msg *msg;
2352 if (cmd == RTM_NEWADDR)
2353 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2354
2355 msg = nlmsg_alloc_simple(cmd, flags);
2356 if (!msg)
2357 return -1;
2358
2359 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2360 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2361 if (v4) {
2362 if (addr->broadcast)
2363 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2364 if (addr->point_to_point)
2365 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2366 } else {
2367 time_t now = system_get_rtime();
2368 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2369
2370 if (addr->preferred_until) {
2371 int64_t preferred = addr->preferred_until - now;
2372 if (preferred < 0)
2373 preferred = 0;
2374 else if (preferred > UINT32_MAX)
2375 preferred = UINT32_MAX;
2376
2377 cinfo.ifa_prefered = preferred;
2378 }
2379
2380 if (addr->valid_until) {
2381 int64_t valid = addr->valid_until - now;
2382 if (valid <= 0) {
2383 nlmsg_free(msg);
2384 return -1;
2385 }
2386 else if (valid > UINT32_MAX)
2387 valid = UINT32_MAX;
2388
2389 cinfo.ifa_valid = valid;
2390 }
2391
2392 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2393
2394 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2395 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2396 }
2397
2398 return system_rtnl_call(msg);
2399 }
2400
2401 int system_add_address(struct device *dev, struct device_addr *addr)
2402 {
2403 return system_addr(dev, addr, RTM_NEWADDR);
2404 }
2405
2406 int system_del_address(struct device *dev, struct device_addr *addr)
2407 {
2408 return system_addr(dev, addr, RTM_DELADDR);
2409 }
2410
2411 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2412 {
2413 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2414 unsigned int flags = 0;
2415 struct ndmsg ndm = {
2416 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2417 .ndm_ifindex = dev->ifindex,
2418 .ndm_state = NUD_PERMANENT,
2419 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2420 };
2421 struct nl_msg *msg;
2422
2423 if (cmd == RTM_NEWNEIGH)
2424 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2425
2426 msg = nlmsg_alloc_simple(cmd, flags);
2427
2428 if (!msg)
2429 return -1;
2430
2431 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2432
2433 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2434 if (neighbor->flags & DEVNEIGH_MAC)
2435 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2436
2437
2438 return system_rtnl_call(msg);
2439 }
2440
2441 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2442 {
2443 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2444 }
2445
2446 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2447 {
2448 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2449 }
2450
2451 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2452 {
2453 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2454 bool have_gw;
2455 unsigned int flags = 0;
2456
2457 if (alen == 4)
2458 have_gw = !!route->nexthop.in.s_addr;
2459 else
2460 have_gw = route->nexthop.in6.s6_addr32[0] ||
2461 route->nexthop.in6.s6_addr32[1] ||
2462 route->nexthop.in6.s6_addr32[2] ||
2463 route->nexthop.in6.s6_addr32[3];
2464
2465 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2466 ? route->table : RT_TABLE_MAIN;
2467
2468 struct rtmsg rtm = {
2469 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2470 .rtm_dst_len = route->mask,
2471 .rtm_src_len = route->sourcemask,
2472 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2473 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2474 .rtm_scope = RT_SCOPE_NOWHERE,
2475 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2476 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2477 };
2478 struct nl_msg *msg;
2479
2480 if (cmd == RTM_NEWROUTE) {
2481 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2482
2483 if (!dev) { /* Add null-route */
2484 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2485 rtm.rtm_type = RTN_UNREACHABLE;
2486 }
2487 else
2488 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2489 }
2490
2491 if (route->flags & DEVROUTE_TYPE) {
2492 rtm.rtm_type = route->type;
2493 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2494 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2495 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2496 rtm.rtm_table = RT_TABLE_LOCAL;
2497 }
2498
2499 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2500 rtm.rtm_scope = RT_SCOPE_HOST;
2501 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2502 rtm.rtm_type == RTN_ANYCAST) {
2503 rtm.rtm_scope = RT_SCOPE_LINK;
2504 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2505 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2506 rtm.rtm_type == RTN_THROW) {
2507 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2508 dev = NULL;
2509 }
2510 }
2511
2512 msg = nlmsg_alloc_simple(cmd, flags);
2513 if (!msg)
2514 return -1;
2515
2516 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2517
2518 if (route->mask)
2519 nla_put(msg, RTA_DST, alen, &route->addr);
2520
2521 if (route->sourcemask) {
2522 if (rtm.rtm_family == AF_INET)
2523 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2524 else
2525 nla_put(msg, RTA_SRC, alen, &route->source);
2526 }
2527
2528 if (route->metric > 0)
2529 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2530
2531 if (have_gw)
2532 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2533
2534 if (dev)
2535 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2536
2537 if (table >= 256)
2538 nla_put_u32(msg, RTA_TABLE, table);
2539
2540 if (route->flags & DEVROUTE_MTU) {
2541 struct nlattr *metrics;
2542
2543 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2544 goto nla_put_failure;
2545
2546 nla_put_u32(msg, RTAX_MTU, route->mtu);
2547
2548 nla_nest_end(msg, metrics);
2549 }
2550
2551 return system_rtnl_call(msg);
2552
2553 nla_put_failure:
2554 nlmsg_free(msg);
2555 return -ENOMEM;
2556 }
2557
2558 int system_add_route(struct device *dev, struct device_route *route)
2559 {
2560 return system_rt(dev, route, RTM_NEWROUTE);
2561 }
2562
2563 int system_del_route(struct device *dev, struct device_route *route)
2564 {
2565 return system_rt(dev, route, RTM_DELROUTE);
2566 }
2567
2568 int system_flush_routes(void)
2569 {
2570 const char *names[] = {
2571 "/proc/sys/net/ipv4/route/flush",
2572 "/proc/sys/net/ipv6/route/flush"
2573 };
2574 int fd, i;
2575
2576 for (i = 0; i < ARRAY_SIZE(names); i++) {
2577 fd = open(names[i], O_WRONLY);
2578 if (fd < 0)
2579 continue;
2580
2581 if (write(fd, "-1", 2)) {}
2582 close(fd);
2583 }
2584 return 0;
2585 }
2586
2587 bool system_resolve_rt_type(const char *type, unsigned int *id)
2588 {
2589 return system_rtn_aton(type, id);
2590 }
2591
2592 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2593 {
2594 FILE *f;
2595 char *e, buf[128];
2596 unsigned int n, proto = 256;
2597 n = strtoul(type, &e, 0);
2598 if (!*e && e != type)
2599 proto = n;
2600 else if (!strcmp(type, "unspec"))
2601 proto = RTPROT_UNSPEC;
2602 else if (!strcmp(type, "kernel"))
2603 proto = RTPROT_KERNEL;
2604 else if (!strcmp(type, "boot"))
2605 proto = RTPROT_BOOT;
2606 else if (!strcmp(type, "static"))
2607 proto = RTPROT_STATIC;
2608 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2609 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2610 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2611 continue;
2612
2613 n = strtoul(e, NULL, 10);
2614 e = strtok(NULL, " \t\n");
2615
2616 if (e && !strcmp(e, type)) {
2617 proto = n;
2618 break;
2619 }
2620 }
2621 fclose(f);
2622 }
2623
2624 if (proto > 255)
2625 return false;
2626
2627 *id = proto;
2628 return true;
2629 }
2630
2631 bool system_resolve_rt_table(const char *name, unsigned int *id)
2632 {
2633 FILE *f;
2634 char *e, buf[128];
2635 unsigned int n, table = RT_TABLE_UNSPEC;
2636
2637 /* first try to parse table as number */
2638 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2639 table = n;
2640
2641 /* handle well known aliases */
2642 else if (!strcmp(name, "default"))
2643 table = RT_TABLE_DEFAULT;
2644 else if (!strcmp(name, "main"))
2645 table = RT_TABLE_MAIN;
2646 else if (!strcmp(name, "local"))
2647 table = RT_TABLE_LOCAL;
2648
2649 /* try to look up name in /etc/iproute2/rt_tables */
2650 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2651 {
2652 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2653 {
2654 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2655 continue;
2656
2657 n = strtoul(e, NULL, 10);
2658 e = strtok(NULL, " \t\n");
2659
2660 if (e && !strcmp(e, name))
2661 {
2662 table = n;
2663 break;
2664 }
2665 }
2666
2667 fclose(f);
2668 }
2669
2670 if (table == RT_TABLE_UNSPEC)
2671 return false;
2672
2673 *id = table;
2674 return true;
2675 }
2676
2677 bool system_is_default_rt_table(unsigned int id)
2678 {
2679 return (id == RT_TABLE_MAIN);
2680 }
2681
2682 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2683 {
2684 char *e;
2685 unsigned int n;
2686
2687 if (!strcmp(filter, "strict"))
2688 n = 1;
2689 else if (!strcmp(filter, "loose"))
2690 n = 2;
2691 else {
2692 n = strtoul(filter, &e, 0);
2693 if (*e || e == filter || n > 2)
2694 return false;
2695 }
2696
2697 *id = n;
2698 return true;
2699 }
2700
2701 static int system_iprule(struct iprule *rule, int cmd)
2702 {
2703 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2704
2705 struct nl_msg *msg;
2706 struct rtmsg rtm = {
2707 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2708 .rtm_protocol = RTPROT_STATIC,
2709 .rtm_scope = RT_SCOPE_UNIVERSE,
2710 .rtm_table = RT_TABLE_UNSPEC,
2711 .rtm_type = RTN_UNSPEC,
2712 .rtm_flags = 0,
2713 };
2714
2715 if (cmd == RTM_NEWRULE)
2716 rtm.rtm_type = RTN_UNICAST;
2717
2718 if (rule->invert)
2719 rtm.rtm_flags |= FIB_RULE_INVERT;
2720
2721 if (rule->flags & IPRULE_SRC)
2722 rtm.rtm_src_len = rule->src_mask;
2723
2724 if (rule->flags & IPRULE_DEST)
2725 rtm.rtm_dst_len = rule->dest_mask;
2726
2727 if (rule->flags & IPRULE_TOS)
2728 rtm.rtm_tos = rule->tos;
2729
2730 if (rule->flags & IPRULE_LOOKUP) {
2731 if (rule->lookup < 256)
2732 rtm.rtm_table = rule->lookup;
2733 }
2734
2735 if (rule->flags & IPRULE_ACTION)
2736 rtm.rtm_type = rule->action;
2737 else if (rule->flags & IPRULE_GOTO)
2738 rtm.rtm_type = FR_ACT_GOTO;
2739 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2740 rtm.rtm_type = FR_ACT_NOP;
2741
2742 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2743
2744 if (!msg)
2745 return -1;
2746
2747 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2748
2749 if (rule->flags & IPRULE_IN)
2750 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2751
2752 if (rule->flags & IPRULE_OUT)
2753 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2754
2755 if (rule->flags & IPRULE_SRC)
2756 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2757
2758 if (rule->flags & IPRULE_DEST)
2759 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2760
2761 if (rule->flags & IPRULE_PRIORITY)
2762 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2763 else if (cmd == RTM_NEWRULE)
2764 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2765
2766 if (rule->flags & IPRULE_FWMARK)
2767 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2768
2769 if (rule->flags & IPRULE_FWMASK)
2770 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2771
2772 if (rule->flags & IPRULE_LOOKUP) {
2773 if (rule->lookup >= 256)
2774 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2775 }
2776
2777 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2778 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2779
2780 if (rule->flags & IPRULE_GOTO)
2781 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2782
2783 return system_rtnl_call(msg);
2784 }
2785
2786 int system_add_iprule(struct iprule *rule)
2787 {
2788 return system_iprule(rule, RTM_NEWRULE);
2789 }
2790
2791 int system_del_iprule(struct iprule *rule)
2792 {
2793 return system_iprule(rule, RTM_DELRULE);
2794 }
2795
2796 int system_flush_iprules(void)
2797 {
2798 int rv = 0;
2799 struct iprule rule;
2800
2801 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2802 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2803
2804 memset(&rule, 0, sizeof(rule));
2805
2806
2807 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2808
2809 rule.priority = 0;
2810 rule.lookup = RT_TABLE_LOCAL;
2811 rv |= system_iprule(&rule, RTM_NEWRULE);
2812
2813 rule.priority = 32766;
2814 rule.lookup = RT_TABLE_MAIN;
2815 rv |= system_iprule(&rule, RTM_NEWRULE);
2816
2817 rule.priority = 32767;
2818 rule.lookup = RT_TABLE_DEFAULT;
2819 rv |= system_iprule(&rule, RTM_NEWRULE);
2820
2821
2822 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2823
2824 rule.priority = 0;
2825 rule.lookup = RT_TABLE_LOCAL;
2826 rv |= system_iprule(&rule, RTM_NEWRULE);
2827
2828 rule.priority = 32766;
2829 rule.lookup = RT_TABLE_MAIN;
2830 rv |= system_iprule(&rule, RTM_NEWRULE);
2831
2832 return rv;
2833 }
2834
2835 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2836 {
2837 return system_rtn_aton(action, id);
2838 }
2839
2840 time_t system_get_rtime(void)
2841 {
2842 struct timespec ts;
2843 struct timeval tv;
2844
2845 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2846 return ts.tv_sec;
2847
2848 if (gettimeofday(&tv, NULL) == 0)
2849 return tv.tv_sec;
2850
2851 return 0;
2852 }
2853
2854 #ifndef IP_DF
2855 #define IP_DF 0x4000
2856 #endif
2857
2858 static int tunnel_ioctl(const char *name, int cmd, void *p)
2859 {
2860 struct ifreq ifr;
2861
2862 memset(&ifr, 0, sizeof(ifr));
2863 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2864 ifr.ifr_ifru.ifru_data = p;
2865 return ioctl(sock_ioctl, cmd, &ifr);
2866 }
2867
2868 #ifdef IFLA_IPTUN_MAX
2869 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2870 struct blob_attr **tb)
2871 {
2872 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2873 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2874 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2875 struct blob_attr *cur;
2876 int ret = 0, ttl = 0;
2877
2878 if (!nlm)
2879 return -1;
2880
2881 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2882 nla_put_string(nlm, IFLA_IFNAME, name);
2883
2884 if (link)
2885 nla_put_u32(nlm, IFLA_LINK, link);
2886
2887 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2888 if (!linkinfo) {
2889 ret = -ENOMEM;
2890 goto failure;
2891 }
2892
2893 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2894 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2895 if (!infodata) {
2896 ret = -ENOMEM;
2897 goto failure;
2898 }
2899
2900 if (link)
2901 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2902
2903 if ((cur = tb[TUNNEL_ATTR_TTL]))
2904 ttl = blobmsg_get_u32(cur);
2905
2906 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2907 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2908
2909 struct in6_addr in6buf;
2910 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2911 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2912 ret = -EINVAL;
2913 goto failure;
2914 }
2915 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2916 }
2917
2918 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2919 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2920 ret = -EINVAL;
2921 goto failure;
2922 }
2923 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2924 }
2925
2926 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2927 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2928 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2929
2930 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2931 blobmsg_data(cur), blobmsg_len(cur));
2932
2933 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2934 char *str = blobmsg_get_string(cur);
2935
2936 if (strcmp(str, "ignore")) {
2937 char *e;
2938 unsigned encap_limit = strtoul(str, &e, 0);
2939
2940 if (e == str || *e || encap_limit > 255) {
2941 ret = -EINVAL;
2942 goto failure;
2943 }
2944
2945 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2946 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2947 }
2948 }
2949
2950 #ifdef IFLA_IPTUN_FMR_MAX
2951 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2952 struct blob_attr *rcur;
2953 unsigned rrem, fmrcnt = 0;
2954 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2955
2956 if (!fmrs) {
2957 ret = -ENOMEM;
2958 goto failure;
2959 }
2960
2961 blobmsg_for_each_attr(rcur, cur, rrem) {
2962 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2963 struct in6_addr ip6prefix;
2964 struct in_addr ip4prefix;
2965 unsigned ip4len, ip6len, ealen, offset;
2966
2967 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2968 blobmsg_data(rcur), blobmsg_len(rcur));
2969
2970 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2971 !parse_ip_and_netmask(AF_INET6,
2972 blobmsg_data(tb_cur), &ip6prefix,
2973 &ip6len)) {
2974 ret = -EINVAL;
2975 goto failure;
2976 }
2977
2978 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2979 !parse_ip_and_netmask(AF_INET,
2980 blobmsg_data(tb_cur), &ip4prefix,
2981 &ip4len)) {
2982 ret = -EINVAL;
2983 goto failure;
2984 }
2985
2986 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2987 ret = -EINVAL;
2988 goto failure;
2989 }
2990 ealen = blobmsg_get_u32(tb_cur);
2991
2992 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2993 ret = -EINVAL;
2994 goto failure;
2995 }
2996 offset = blobmsg_get_u32(tb_cur);
2997
2998 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2999 if (!rule) {
3000 ret = -ENOMEM;
3001 goto failure;
3002 }
3003
3004 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3005 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3006 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3007 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3008 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3009 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3010
3011 nla_nest_end(nlm, rule);
3012 }
3013
3014 nla_nest_end(nlm, fmrs);
3015 }
3016 #endif
3017 if (tun_flags)
3018 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3019 }
3020
3021 nla_nest_end(nlm, infodata);
3022 nla_nest_end(nlm, linkinfo);
3023
3024 return system_rtnl_call(nlm);
3025
3026 failure:
3027 nlmsg_free(nlm);
3028 return ret;
3029 }
3030 #endif
3031
3032 #ifdef IFLA_IPTUN_MAX
3033 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3034 static int system_add_gre_tunnel(const char *name, const char *kind,
3035 const unsigned int link, struct blob_attr **tb, bool v6)
3036 {
3037 struct nl_msg *nlm;
3038 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3039 struct blob_attr *cur;
3040 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3041 uint16_t iflags = 0, oflags = 0;
3042 uint8_t tos = 0;
3043 int ret = 0, ttl = 0;
3044 unsigned encap_limit = 0;
3045
3046 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3047 if (!nlm)
3048 return -1;
3049
3050 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3051 nla_put_string(nlm, IFLA_IFNAME, name);
3052
3053 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3054 if (!linkinfo) {
3055 ret = -ENOMEM;
3056 goto failure;
3057 }
3058
3059 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3060 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3061 if (!infodata) {
3062 ret = -ENOMEM;
3063 goto failure;
3064 }
3065
3066 if (link)
3067 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3068
3069 if ((cur = tb[TUNNEL_ATTR_TTL]))
3070 ttl = blobmsg_get_u32(cur);
3071
3072 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3073 char *str = blobmsg_get_string(cur);
3074 if (strcmp(str, "inherit")) {
3075 unsigned uval;
3076
3077 if (!system_tos_aton(str, &uval)) {
3078 ret = -EINVAL;
3079 goto failure;
3080 }
3081
3082 if (v6)
3083 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3084 else
3085 tos = uval;
3086 } else {
3087 if (v6)
3088 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3089 else
3090 tos = 1;
3091 }
3092 }
3093
3094 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3095 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3096
3097 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3098 blobmsg_data(cur), blobmsg_len(cur));
3099
3100 if ((cur = tb_data[GRE_DATA_IKEY])) {
3101 if ((ikey = blobmsg_get_u32(cur)))
3102 iflags |= GRE_KEY;
3103 }
3104
3105 if ((cur = tb_data[GRE_DATA_OKEY])) {
3106 if ((okey = blobmsg_get_u32(cur)))
3107 oflags |= GRE_KEY;
3108 }
3109
3110 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3111 if (blobmsg_get_bool(cur))
3112 iflags |= GRE_CSUM;
3113 }
3114
3115 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3116 if (blobmsg_get_bool(cur))
3117 oflags |= GRE_CSUM;
3118 }
3119
3120 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3121 if (blobmsg_get_bool(cur))
3122 iflags |= GRE_SEQ;
3123 }
3124
3125 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3126 if (blobmsg_get_bool(cur))
3127 oflags |= GRE_SEQ;
3128 }
3129
3130 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3131 char *str = blobmsg_get_string(cur);
3132
3133 if (strcmp(str, "ignore")) {
3134 char *e;
3135
3136 encap_limit = strtoul(str, &e, 0);
3137
3138 if (e == str || *e || encap_limit > 255) {
3139 ret = -EINVAL;
3140 goto failure;
3141 }
3142
3143 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3144 }
3145 }
3146 }
3147
3148 if (v6) {
3149 struct in6_addr in6buf;
3150 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3151 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3152 ret = -EINVAL;
3153 goto failure;
3154 }
3155 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3156 }
3157
3158 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3159 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3160 ret = -EINVAL;
3161 goto failure;
3162 }
3163 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3164 }
3165
3166 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3167 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3168
3169 if (flowinfo)
3170 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3171
3172 if (flags6)
3173 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3174
3175 if (!ttl)
3176 ttl = 64;
3177 } else {
3178 struct in_addr inbuf;
3179 bool set_df = true;
3180
3181 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3182 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3183 ret = -EINVAL;
3184 goto failure;
3185 }
3186 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3187 }
3188
3189 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3190 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3191 ret = -EINVAL;
3192 goto failure;
3193 }
3194 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3195
3196 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3197 if (!okey) {
3198 okey = inbuf.s_addr;
3199 oflags |= GRE_KEY;
3200 }
3201
3202 if (!ikey) {
3203 ikey = inbuf.s_addr;
3204 iflags |= GRE_KEY;
3205 }
3206 }
3207 }
3208
3209 if ((cur = tb[TUNNEL_ATTR_DF]))
3210 set_df = blobmsg_get_bool(cur);
3211
3212 if (!set_df) {
3213 /* ttl != 0 and nopmtudisc are incompatible */
3214 if (ttl) {
3215 ret = -EINVAL;
3216 goto failure;
3217 }
3218 } else if (!ttl)
3219 ttl = 64;
3220
3221 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3222
3223 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3224 }
3225
3226 if (ttl)
3227 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3228
3229 if (oflags)
3230 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3231
3232 if (iflags)
3233 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3234
3235 if (okey)
3236 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3237
3238 if (ikey)
3239 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3240
3241 nla_nest_end(nlm, infodata);
3242 nla_nest_end(nlm, linkinfo);
3243
3244 return system_rtnl_call(nlm);
3245
3246 failure:
3247 nlmsg_free(nlm);
3248 return ret;
3249 }
3250 #endif
3251
3252 #ifdef IFLA_VTI_MAX
3253 static int system_add_vti_tunnel(const char *name, const char *kind,
3254 const unsigned int link, struct blob_attr **tb, bool v6)
3255 {
3256 struct nl_msg *nlm;
3257 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3258 struct blob_attr *cur;
3259 int ret = 0;
3260
3261 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3262 if (!nlm)
3263 return -1;
3264
3265 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3266 nla_put_string(nlm, IFLA_IFNAME, name);
3267
3268 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3269 if (!linkinfo) {
3270 ret = -ENOMEM;
3271 goto failure;
3272 }
3273
3274 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3275 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3276 if (!infodata) {
3277 ret = -ENOMEM;
3278 goto failure;
3279 }
3280
3281 if (link)
3282 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3283
3284 if (v6) {
3285 struct in6_addr in6buf;
3286 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3287 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3288 ret = -EINVAL;
3289 goto failure;
3290 }
3291 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3292 }
3293
3294 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3295 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3296 ret = -EINVAL;
3297 goto failure;
3298 }
3299 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3300 }
3301
3302 } else {
3303 struct in_addr inbuf;
3304
3305 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3306 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3307 ret = -EINVAL;
3308 goto failure;
3309 }
3310 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3311 }
3312
3313 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3314 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3315 ret = -EINVAL;
3316 goto failure;
3317 }
3318 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3319 }
3320
3321 }
3322
3323 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3324 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3325 uint32_t ikey = 0, okey = 0;
3326
3327 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3328 blobmsg_data(cur), blobmsg_len(cur));
3329
3330 if ((cur = tb_data[VTI_DATA_IKEY])) {
3331 if ((ikey = blobmsg_get_u32(cur)))
3332 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3333 }
3334
3335 if ((cur = tb_data[VTI_DATA_OKEY])) {
3336 if ((okey = blobmsg_get_u32(cur)))
3337 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3338 }
3339 }
3340
3341 nla_nest_end(nlm, infodata);
3342 nla_nest_end(nlm, linkinfo);
3343
3344 return system_rtnl_call(nlm);
3345
3346 failure:
3347 nlmsg_free(nlm);
3348 return ret;
3349 }
3350 #endif
3351
3352 #ifdef IFLA_XFRM_MAX
3353 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3354 const unsigned int link, struct blob_attr **tb)
3355 {
3356 struct nl_msg *nlm;
3357 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3358 struct blob_attr *cur;
3359 int ret = 0;
3360
3361 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3362 if (!nlm)
3363 return -1;
3364
3365 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3366 nla_put_string(nlm, IFLA_IFNAME, name);
3367
3368 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3369 if (!linkinfo) {
3370 ret = -ENOMEM;
3371 goto failure;
3372 }
3373
3374 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3375 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3376 if (!infodata) {
3377 ret = -ENOMEM;
3378 goto failure;
3379 }
3380
3381 if (link)
3382 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3383
3384 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3385 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3386 uint32_t if_id = 0;
3387
3388 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3389 blobmsg_data(cur), blobmsg_len(cur));
3390
3391 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3392 if ((if_id = blobmsg_get_u32(cur)))
3393 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3394 }
3395
3396 }
3397
3398 nla_nest_end(nlm, infodata);
3399 nla_nest_end(nlm, linkinfo);
3400
3401 return system_rtnl_call(nlm);
3402
3403 failure:
3404 nlmsg_free(nlm);
3405 return ret;
3406 }
3407 #endif
3408
3409 #ifdef IFLA_VXLAN_MAX
3410 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3411 struct blob_attr *cur;
3412 if ((cur = tb_data[vxlandatatype])) {
3413 bool val = blobmsg_get_bool(cur);
3414 if (invert)
3415 val = !val;
3416
3417 if ((attrtype == IFLA_VXLAN_GBP) && val)
3418 nla_put_flag(msg, attrtype);
3419 else
3420 nla_put_u8(msg, attrtype, val);
3421
3422 }
3423 }
3424
3425 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3426 {
3427 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3428 struct nl_msg *msg;
3429 struct nlattr *linkinfo, *data;
3430 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3431 struct blob_attr *cur;
3432 int ret = 0;
3433
3434 if ((cur = tb[TUNNEL_ATTR_DATA]))
3435 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3436 blobmsg_data(cur), blobmsg_len(cur));
3437 else
3438 return -EINVAL;
3439
3440 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3441
3442 if (!msg)
3443 return -1;
3444
3445 nlmsg_append(msg, &iim, sizeof(iim), 0);
3446
3447 nla_put_string(msg, IFLA_IFNAME, name);
3448
3449 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3450 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3451 if (!ea) {
3452 ret = -EINVAL;
3453 goto failure;
3454 }
3455
3456 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3457 }
3458
3459 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3460 uint32_t mtu = blobmsg_get_u32(cur);
3461 nla_put_u32(msg, IFLA_MTU, mtu);
3462 }
3463
3464 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3465 ret = -ENOMEM;
3466 goto failure;
3467 }
3468
3469 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3470
3471 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3472 ret = -ENOMEM;
3473 goto failure;
3474 }
3475
3476 if (link)
3477 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3478
3479 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3480 uint32_t id = blobmsg_get_u32(cur);
3481 if (id >= (1u << 24) - 1) {
3482 ret = -EINVAL;
3483 goto failure;
3484 }
3485
3486 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3487 }
3488
3489 if (v6) {
3490 struct in6_addr in6buf;
3491 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3492 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3493 ret = -EINVAL;
3494 goto failure;
3495 }
3496 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3497 }
3498
3499 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3500 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3501 ret = -EINVAL;
3502 goto failure;
3503 }
3504 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3505 }
3506 } else {
3507 struct in_addr inbuf;
3508
3509 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3510 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3511 ret = -EINVAL;
3512 goto failure;
3513 }
3514 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3515 }
3516
3517 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3518 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3519 ret = -EINVAL;
3520 goto failure;
3521 }
3522 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3523 }
3524 }
3525
3526 uint32_t port = 4789;
3527 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3528 port = blobmsg_get_u32(cur);
3529 if (port < 1 || port > 65535) {
3530 ret = -EINVAL;
3531 goto failure;
3532 }
3533 }
3534 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3535
3536 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3537 struct ifla_vxlan_port_range srcports = {0,0};
3538
3539 uint32_t low = blobmsg_get_u32(cur);
3540 if (low < 1 || low > 65535 - 1) {
3541 ret = -EINVAL;
3542 goto failure;
3543 }
3544
3545 srcports.low = htons((uint16_t) low);
3546 srcports.high = htons((uint16_t) (low+1));
3547
3548 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3549 uint32_t high = blobmsg_get_u32(cur);
3550 if (high < 1 || high > 65535) {
3551 ret = -EINVAL;
3552 goto failure;
3553 }
3554
3555 if (high > low)
3556 srcports.high = htons((uint16_t) high);
3557 }
3558
3559 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3560 }
3561
3562 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3563 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3564 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3565 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3566 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3567 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3568 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3569 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3570 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3571
3572 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3573 uint32_t ageing = blobmsg_get_u32(cur);
3574 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3575 }
3576
3577 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3578 uint32_t maxaddress = blobmsg_get_u32(cur);
3579 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3580 }
3581
3582 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3583 char *str = blobmsg_get_string(cur);
3584 unsigned tos = 1;
3585
3586 if (strcmp(str, "inherit")) {
3587 if (!system_tos_aton(str, &tos)) {
3588 ret = -EINVAL;
3589 goto failure;
3590 }
3591 }
3592
3593 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3594 }
3595
3596 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3597 uint32_t ttl = blobmsg_get_u32(cur);
3598 if (ttl < 1 || ttl > 255) {
3599 ret = -EINVAL;
3600 goto failure;
3601 }
3602
3603 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3604 }
3605
3606 nla_nest_end(msg, data);
3607 nla_nest_end(msg, linkinfo);
3608
3609 ret = system_rtnl_call(msg);
3610 if (ret)
3611 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3612
3613 return ret;
3614
3615 failure:
3616 nlmsg_free(msg);
3617 return ret;
3618 }
3619 #endif
3620
3621 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3622 {
3623 struct blob_attr *cur;
3624 int ret = 0;
3625
3626 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3627 return -1;
3628
3629 #ifdef SIOCADD6RD
3630 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3631 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3632 unsigned int mask;
3633 struct ip_tunnel_6rd p6;
3634
3635 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3636 blobmsg_data(cur), blobmsg_len(cur));
3637
3638 memset(&p6, 0, sizeof(p6));
3639
3640 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3641 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3642 &p6.prefix, &mask) || mask > 128) {
3643 ret = -EINVAL;
3644 goto failure;
3645 }
3646
3647 p6.prefixlen = mask;
3648 }
3649
3650 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3651 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3652 &p6.relay_prefix, &mask) || mask > 32) {
3653 ret = -EINVAL;
3654 goto failure;
3655 }
3656
3657 p6.relay_prefixlen = mask;
3658 }
3659
3660 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3661 ret = -1;
3662 goto failure;
3663 }
3664 }
3665 #endif
3666
3667 return ret;
3668
3669 failure:
3670 __system_del_ip_tunnel(name, tb);
3671 return ret;
3672 }
3673
3674 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3675 {
3676 struct blob_attr *cur;
3677 bool set_df = true;
3678 struct ip_tunnel_parm p = {
3679 .link = link,
3680 .iph = {
3681 .version = 4,
3682 .ihl = 5,
3683 .protocol = proto,
3684 }
3685 };
3686
3687 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3688 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3689 return -EINVAL;
3690
3691 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3692 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3693 return -EINVAL;
3694
3695 if ((cur = tb[TUNNEL_ATTR_DF]))
3696 set_df = blobmsg_get_bool(cur);
3697
3698 if ((cur = tb[TUNNEL_ATTR_TTL]))
3699 p.iph.ttl = blobmsg_get_u32(cur);
3700
3701 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3702 char *str = blobmsg_get_string(cur);
3703 if (strcmp(str, "inherit")) {
3704 unsigned uval;
3705
3706 if (!system_tos_aton(str, &uval))
3707 return -EINVAL;
3708
3709 p.iph.tos = uval;
3710 } else
3711 p.iph.tos = 1;
3712 }
3713
3714 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3715 /* ttl !=0 and nopmtudisc are incompatible */
3716 if (p.iph.ttl && p.iph.frag_off == 0)
3717 return -EINVAL;
3718
3719 strncpy(p.name, name, sizeof(p.name) - 1);
3720
3721 switch (p.iph.protocol) {
3722 case IPPROTO_IPIP:
3723 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3724 case IPPROTO_IPV6:
3725 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3726 default:
3727 break;
3728 }
3729 return -1;
3730 }
3731
3732 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3733 {
3734 struct blob_attr *cur;
3735 const char *str;
3736
3737 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3738 return -EINVAL;
3739 str = blobmsg_data(cur);
3740
3741 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3742 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3743 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3744 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3745 !strcmp(str, "xfrm"))
3746 return system_link_del(name);
3747 else
3748 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3749 }
3750
3751 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3752 {
3753 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3754
3755 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3756 blob_data(attr), blob_len(attr));
3757
3758 return __system_del_ip_tunnel(name, tb);
3759 }
3760
3761 int system_update_ipv6_mtu(struct device *dev, int mtu)
3762 {
3763 int ret = -1;
3764 char buf[64];
3765 int fd;
3766
3767 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3768 dev->ifname);
3769
3770 fd = open(buf, O_RDWR);
3771 if (fd < 0)
3772 return ret;
3773
3774 if (!mtu) {
3775 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3776 if (len < 0)
3777 goto out;
3778
3779 buf[len] = 0;
3780 ret = atoi(buf);
3781 } else {
3782 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3783 ret = mtu;
3784 }
3785
3786 out:
3787 close(fd);
3788 return ret;
3789 }
3790
3791 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3792 {
3793 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3794 struct blob_attr *cur;
3795 const char *str;
3796
3797 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3798 blob_data(attr), blob_len(attr));
3799
3800 __system_del_ip_tunnel(name, tb);
3801
3802 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3803 return -EINVAL;
3804 str = blobmsg_data(cur);
3805
3806 unsigned int ttl = 0;
3807 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3808 ttl = blobmsg_get_u32(cur);
3809 if (ttl > 255)
3810 return -EINVAL;
3811 }
3812
3813 unsigned int link = 0;
3814 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3815 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3816 if (!iface)
3817 return -EINVAL;
3818
3819 if (iface->l3_dev.dev)
3820 link = iface->l3_dev.dev->ifindex;
3821 }
3822
3823 if (!strcmp(str, "sit"))
3824 return system_add_sit_tunnel(name, link, tb);
3825 #ifdef IFLA_IPTUN_MAX
3826 else if (!strcmp(str, "ipip6")) {
3827 return system_add_ip6_tunnel(name, link, tb);
3828 } else if (!strcmp(str, "greip")) {
3829 return system_add_gre_tunnel(name, "gre", link, tb, false);
3830 } else if (!strcmp(str, "gretapip")) {
3831 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3832 } else if (!strcmp(str, "greip6")) {
3833 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3834 } else if (!strcmp(str, "gretapip6")) {
3835 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3836 #ifdef IFLA_VTI_MAX
3837 } else if (!strcmp(str, "vtiip")) {
3838 return system_add_vti_tunnel(name, "vti", link, tb, false);
3839 } else if (!strcmp(str, "vtiip6")) {
3840 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3841 #endif
3842 #ifdef IFLA_XFRM_MAX
3843 } else if (!strcmp(str, "xfrm")) {
3844 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3845 #endif
3846 #ifdef IFLA_VXLAN_MAX
3847 } else if(!strcmp(str, "vxlan")) {
3848 return system_add_vxlan(name, link, tb, false);
3849 } else if(!strcmp(str, "vxlan6")) {
3850 return system_add_vxlan(name, link, tb, true);
3851 #endif
3852 #endif
3853 } else if (!strcmp(str, "ipip")) {
3854 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3855 }
3856 else
3857 return -EINVAL;
3858
3859 return 0;
3860 }
OpenWrt Network interface configuration daemon