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