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system-linux: initialize ifreq struct before using it
[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_bridge_vlan(const char *iface, uint16_t vid, bool add, unsigned int vflags)
858 {
859 struct ifinfomsg ifi = { .ifi_family = PF_BRIDGE, };
860 struct bridge_vlan_info vinfo = { .vid = vid, };
861 unsigned short flags = 0;
862 struct nlattr *afspec;
863 struct nl_msg *nlm;
864 int ret = 0;
865
866 ifi.ifi_index = if_nametoindex(iface);
867 if (!ifi.ifi_index)
868 return -1;
869
870 nlm = nlmsg_alloc_simple(add ? RTM_SETLINK : RTM_DELLINK, NLM_F_REQUEST);
871 if (!nlm)
872 return -1;
873
874 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
875
876 if (vflags & BRVLAN_F_SELF)
877 flags |= BRIDGE_FLAGS_SELF;
878
879 if (vflags & BRVLAN_F_PVID)
880 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
881
882 if (vflags & BRVLAN_F_UNTAGGED)
883 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
884
885 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
886 if (!afspec) {
887 ret = -ENOMEM;
888 goto failure;
889 }
890
891 if (flags)
892 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
893
894 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
895 nla_nest_end(nlm, afspec);
896
897 return system_rtnl_call(nlm);
898
899 failure:
900 nlmsg_free(nlm);
901 return ret;
902 }
903
904 int system_if_resolve(struct device *dev)
905 {
906 struct ifreq ifr;
907
908 memset(&ifr, 0, sizeof(ifr));
909 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
910 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
911 return ifr.ifr_ifindex;
912 else
913 return 0;
914 }
915
916 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
917 {
918 struct ifreq ifr;
919
920 memset(&ifr, 0, sizeof(ifr));
921 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
922 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
923 return -1;
924
925 ifr.ifr_flags |= add;
926 ifr.ifr_flags &= ~rem;
927 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
928 }
929
930 struct clear_data {
931 struct nl_msg *msg;
932 struct device *dev;
933 int type;
934 int size;
935 int af;
936 };
937
938
939 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
940 {
941 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
942
943 return ifa->ifa_index == ifindex;
944 }
945
946 static bool check_route(struct nlmsghdr *hdr, int ifindex)
947 {
948 struct rtmsg *r = NLMSG_DATA(hdr);
949 struct nlattr *tb[__RTA_MAX];
950
951 if (r->rtm_protocol == RTPROT_KERNEL &&
952 r->rtm_family == AF_INET6)
953 return false;
954
955 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
956 if (!tb[RTA_OIF])
957 return false;
958
959 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
960 }
961
962 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
963 {
964 return true;
965 }
966
967 static int cb_clear_event(struct nl_msg *msg, void *arg)
968 {
969 struct clear_data *clr = arg;
970 struct nlmsghdr *hdr = nlmsg_hdr(msg);
971 bool (*cb)(struct nlmsghdr *, int ifindex);
972 int type, ret;
973
974 switch(clr->type) {
975 case RTM_GETADDR:
976 type = RTM_DELADDR;
977 if (hdr->nlmsg_type != RTM_NEWADDR)
978 return NL_SKIP;
979
980 cb = check_ifaddr;
981 break;
982 case RTM_GETROUTE:
983 type = RTM_DELROUTE;
984 if (hdr->nlmsg_type != RTM_NEWROUTE)
985 return NL_SKIP;
986
987 cb = check_route;
988 break;
989 case RTM_GETRULE:
990 type = RTM_DELRULE;
991 if (hdr->nlmsg_type != RTM_NEWRULE)
992 return NL_SKIP;
993
994 cb = check_rule;
995 break;
996 default:
997 return NL_SKIP;
998 }
999
1000 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1001 return NL_SKIP;
1002
1003 if (type == RTM_DELRULE)
1004 D(SYSTEM, "Remove a rule\n");
1005 else
1006 D(SYSTEM, "Remove %s from device %s\n",
1007 type == RTM_DELADDR ? "an address" : "a route",
1008 clr->dev->ifname);
1009
1010 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1011 hdr = nlmsg_hdr(clr->msg);
1012 hdr->nlmsg_type = type;
1013 hdr->nlmsg_flags = NLM_F_REQUEST;
1014
1015 nl_socket_disable_auto_ack(sock_rtnl);
1016 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1017 if (ret < 0) {
1018 if (type == RTM_DELRULE)
1019 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1020 else
1021 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1022 type == RTM_DELADDR ? "an address" : "a route",
1023 clr->dev->ifname, ret);
1024 }
1025
1026 nl_socket_enable_auto_ack(sock_rtnl);
1027
1028 return NL_SKIP;
1029 }
1030
1031 static int
1032 cb_finish_event(struct nl_msg *msg, void *arg)
1033 {
1034 int *pending = arg;
1035 *pending = 0;
1036 return NL_STOP;
1037 }
1038
1039 static int
1040 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1041 {
1042 int *pending = arg;
1043 *pending = err->error;
1044 return NL_STOP;
1045 }
1046
1047 static void
1048 system_if_clear_entries(struct device *dev, int type, int af)
1049 {
1050 struct clear_data clr;
1051 struct nl_cb *cb;
1052 struct rtmsg rtm = {
1053 .rtm_family = af,
1054 .rtm_flags = RTM_F_CLONED,
1055 };
1056 int flags = NLM_F_DUMP;
1057 int pending = 1;
1058
1059 clr.af = af;
1060 clr.dev = dev;
1061 clr.type = type;
1062 switch (type) {
1063 case RTM_GETADDR:
1064 case RTM_GETRULE:
1065 clr.size = sizeof(struct rtgenmsg);
1066 break;
1067 case RTM_GETROUTE:
1068 clr.size = sizeof(struct rtmsg);
1069 break;
1070 default:
1071 return;
1072 }
1073
1074 cb = nl_cb_alloc(NL_CB_DEFAULT);
1075 if (!cb)
1076 return;
1077
1078 clr.msg = nlmsg_alloc_simple(type, flags);
1079 if (!clr.msg)
1080 goto out;
1081
1082 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1083 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1084 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1085 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1086
1087 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1088 goto free;
1089
1090 while (pending > 0)
1091 nl_recvmsgs(sock_rtnl, cb);
1092
1093 free:
1094 nlmsg_free(clr.msg);
1095 out:
1096 nl_cb_put(cb);
1097 }
1098
1099 /*
1100 * Clear bridge (membership) state and bring down device
1101 */
1102 void system_if_clear_state(struct device *dev)
1103 {
1104 static char buf[256];
1105 char *bridge;
1106 device_set_ifindex(dev, system_if_resolve(dev));
1107
1108 if (dev->external || !dev->ifindex)
1109 return;
1110
1111 system_if_flags(dev->ifname, 0, IFF_UP);
1112
1113 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
1114 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1115 system_bridge_delbr(dev);
1116 return;
1117 }
1118
1119 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1120 if (bridge) {
1121 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1122 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1123 }
1124
1125 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1126 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1127 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1128 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1129 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1130 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1131 system_set_disable_ipv6(dev, "0");
1132 }
1133
1134 static inline unsigned long
1135 sec_to_jiffies(int val)
1136 {
1137 return (unsigned long) val * 100;
1138 }
1139
1140 static void system_bridge_conf_multicast_deps(struct device *bridge,
1141 struct bridge_config *cfg,
1142 char *buf,
1143 int buf_len)
1144 {
1145 int val;
1146
1147 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1148 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1149 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1150 val = cfg->robustness * cfg->query_interval +
1151 cfg->query_response_interval;
1152
1153 snprintf(buf, buf_len, "%i", val);
1154 system_bridge_set_membership_interval(bridge, buf);
1155
1156 val = cfg->robustness * cfg->query_interval +
1157 cfg->query_response_interval / 2;
1158
1159 snprintf(buf, buf_len, "%i", val);
1160 system_bridge_set_other_querier_timeout(bridge, buf);
1161 }
1162
1163 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1164 val = cfg->query_interval / 4;
1165
1166 snprintf(buf, buf_len, "%i", val);
1167 system_bridge_set_startup_query_interval(bridge, buf);
1168 }
1169 }
1170
1171 static void system_bridge_conf_multicast(struct device *bridge,
1172 struct bridge_config *cfg,
1173 char *buf,
1174 int buf_len)
1175 {
1176 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1177 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1178
1179 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1180 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1181
1182 snprintf(buf, buf_len, "%i", cfg->hash_max);
1183 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1184 bridge->ifname, buf);
1185
1186 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1187 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1188 system_bridge_set_multicast_router(bridge, buf, true);
1189 }
1190
1191 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1192 snprintf(buf, buf_len, "%i", cfg->robustness);
1193 system_bridge_set_robustness(bridge, buf);
1194 }
1195
1196 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1197 snprintf(buf, buf_len, "%i", cfg->query_interval);
1198 system_bridge_set_query_interval(bridge, buf);
1199 }
1200
1201 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1202 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1203 system_bridge_set_query_response_interval(bridge, buf);
1204 }
1205
1206 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1207 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1208 system_bridge_set_last_member_interval(bridge, buf);
1209 }
1210
1211 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1212 }
1213
1214 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1215 {
1216 char buf[64];
1217
1218 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1219 return -1;
1220
1221 system_bridge_set_stp_state(bridge, cfg->stp ? "1" : "0");
1222
1223 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1224 system_bridge_set_forward_delay(bridge, buf);
1225
1226 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1227 system_bridge_set_vlan_filtering(bridge, cfg->vlan_filtering ? "1" : "0");
1228
1229 snprintf(buf, sizeof(buf), "%d", cfg->priority);
1230 system_bridge_set_priority(bridge, buf);
1231
1232 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1233 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1234 system_bridge_set_ageing_time(bridge, buf);
1235 }
1236
1237 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1238 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1239 system_bridge_set_hello_time(bridge, buf);
1240 }
1241
1242 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1243 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1244 system_bridge_set_max_age(bridge, buf);
1245 }
1246
1247 return 0;
1248 }
1249
1250 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1251 {
1252 struct nl_msg *msg;
1253 struct nlattr *linkinfo, *data;
1254 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1255 int i, rv;
1256 static const struct {
1257 const char *name;
1258 enum macvlan_mode val;
1259 } modes[] = {
1260 { "private", MACVLAN_MODE_PRIVATE },
1261 { "vepa", MACVLAN_MODE_VEPA },
1262 { "bridge", MACVLAN_MODE_BRIDGE },
1263 { "passthru", MACVLAN_MODE_PASSTHRU },
1264 };
1265
1266 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1267
1268 if (!msg)
1269 return -1;
1270
1271 nlmsg_append(msg, &iim, sizeof(iim), 0);
1272
1273 if (cfg->flags & MACVLAN_OPT_MACADDR)
1274 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1275 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1276 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1277
1278 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1279 goto nla_put_failure;
1280
1281 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1282
1283 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1284 goto nla_put_failure;
1285
1286 if (cfg->mode) {
1287 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1288 if (strcmp(cfg->mode, modes[i].name) != 0)
1289 continue;
1290
1291 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1292 break;
1293 }
1294 }
1295
1296 nla_nest_end(msg, data);
1297 nla_nest_end(msg, linkinfo);
1298
1299 rv = system_rtnl_call(msg);
1300 if (rv)
1301 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1302
1303 return rv;
1304
1305 nla_put_failure:
1306 nlmsg_free(msg);
1307 return -ENOMEM;
1308 }
1309
1310 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1311 {
1312 struct nl_msg *msg;
1313 struct ifinfomsg iim = {
1314 .ifi_family = AF_UNSPEC,
1315 };
1316
1317 if (!dev)
1318 return -1;
1319
1320 iim.ifi_index = system_if_resolve(dev);
1321 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1322
1323 if (!msg)
1324 return -1;
1325
1326 nlmsg_append(msg, &iim, sizeof(iim), 0);
1327 if (target_ifname)
1328 nla_put_string(msg, IFLA_IFNAME, target_ifname);
1329
1330 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1331 return system_rtnl_call(msg);
1332 }
1333
1334 static int system_link_del(const char *ifname)
1335 {
1336 struct nl_msg *msg;
1337 struct ifinfomsg iim = {
1338 .ifi_family = AF_UNSPEC,
1339 .ifi_index = 0,
1340 };
1341
1342 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1343
1344 if (!msg)
1345 return -1;
1346
1347 nlmsg_append(msg, &iim, sizeof(iim), 0);
1348 nla_put_string(msg, IFLA_IFNAME, ifname);
1349 return system_rtnl_call(msg);
1350 }
1351
1352 int system_macvlan_del(struct device *macvlan)
1353 {
1354 return system_link_del(macvlan->ifname);
1355 }
1356
1357 int system_netns_open(const pid_t target_ns)
1358 {
1359 char pid_net_path[PATH_MAX];
1360
1361 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1362
1363 return open(pid_net_path, O_RDONLY);
1364 }
1365
1366 int system_netns_set(int netns_fd)
1367 {
1368 return setns(netns_fd, CLONE_NEWNET);
1369 }
1370
1371 int system_veth_add(struct device *veth, struct veth_config *cfg)
1372 {
1373 struct nl_msg *msg;
1374 struct ifinfomsg empty_iim = {};
1375 struct nlattr *linkinfo, *data, *veth_info;
1376 int rv;
1377
1378 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1379
1380 if (!msg)
1381 return -1;
1382
1383 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1384
1385 if (cfg->flags & VETH_OPT_MACADDR)
1386 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1387 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1388
1389 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1390 goto nla_put_failure;
1391
1392 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1393
1394 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1395 goto nla_put_failure;
1396
1397 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1398 goto nla_put_failure;
1399
1400 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1401
1402 if (cfg->flags & VETH_OPT_PEER_NAME)
1403 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1404 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1405 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1406
1407 nla_nest_end(msg, veth_info);
1408 nla_nest_end(msg, data);
1409 nla_nest_end(msg, linkinfo);
1410
1411 rv = system_rtnl_call(msg);
1412 if (rv) {
1413 if (cfg->flags & VETH_OPT_PEER_NAME)
1414 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1415 else
1416 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1417 }
1418
1419 return rv;
1420
1421 nla_put_failure:
1422 nlmsg_free(msg);
1423 return -ENOMEM;
1424 }
1425
1426 int system_veth_del(struct device *veth)
1427 {
1428 return system_link_del(veth->ifname);
1429 }
1430
1431 static int system_vlan(struct device *dev, int id)
1432 {
1433 struct vlan_ioctl_args ifr = {
1434 .cmd = SET_VLAN_NAME_TYPE_CMD,
1435 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1436 };
1437
1438 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1439 return -1;
1440
1441 if (id < 0) {
1442 ifr.cmd = DEL_VLAN_CMD;
1443 ifr.u.VID = 0;
1444 } else {
1445 ifr.cmd = ADD_VLAN_CMD;
1446 ifr.u.VID = id;
1447 }
1448 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1449 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1450 }
1451
1452 int system_vlan_add(struct device *dev, int id)
1453 {
1454 return system_vlan(dev, id);
1455 }
1456
1457 int system_vlan_del(struct device *dev)
1458 {
1459 return system_vlan(dev, -1);
1460 }
1461
1462 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1463 {
1464 struct nl_msg *msg;
1465 struct nlattr *linkinfo, *data, *qos;
1466 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1467 struct vlan_qos_mapping *elem;
1468 struct ifla_vlan_qos_mapping nl_qos_map;
1469 int rv;
1470
1471 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1472
1473 if (!msg)
1474 return -1;
1475
1476 nlmsg_append(msg, &iim, sizeof(iim), 0);
1477 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1478 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1479
1480 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1481 goto nla_put_failure;
1482
1483 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1484
1485 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1486 goto nla_put_failure;
1487
1488 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1489
1490 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1491 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1492 #else
1493 if(cfg->proto == VLAN_PROTO_8021AD)
1494 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);
1495 #endif
1496
1497 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1498 goto nla_put_failure;
1499
1500 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1501 nl_qos_map.from = elem->from;
1502 nl_qos_map.to = elem->to;
1503 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1504 }
1505 nla_nest_end(msg, qos);
1506
1507 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1508 goto nla_put_failure;
1509
1510 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1511 nl_qos_map.from = elem->from;
1512 nl_qos_map.to = elem->to;
1513 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1514 }
1515 nla_nest_end(msg, qos);
1516
1517 nla_nest_end(msg, data);
1518 nla_nest_end(msg, linkinfo);
1519
1520 rv = system_rtnl_call(msg);
1521 if (rv)
1522 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1523
1524 return rv;
1525
1526 nla_put_failure:
1527 nlmsg_free(msg);
1528 return -ENOMEM;
1529 }
1530
1531 int system_vlandev_del(struct device *vlandev)
1532 {
1533 return system_link_del(vlandev->ifname);
1534 }
1535
1536 void
1537 system_if_get_settings(struct device *dev, struct device_settings *s)
1538 {
1539 struct ifreq ifr;
1540 char buf[10];
1541
1542 memset(&ifr, 0, sizeof(ifr));
1543 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1544
1545 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1546 s->mtu = ifr.ifr_mtu;
1547 s->flags |= DEV_OPT_MTU;
1548 }
1549
1550 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1551 if (s->mtu6 > 0)
1552 s->flags |= DEV_OPT_MTU6;
1553
1554 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1555 s->txqueuelen = ifr.ifr_qlen;
1556 s->flags |= DEV_OPT_TXQUEUELEN;
1557 }
1558
1559 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1560 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1561 s->flags |= DEV_OPT_MACADDR;
1562 }
1563
1564 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1565 s->ipv6 = !strtoul(buf, NULL, 0);
1566 s->flags |= DEV_OPT_IPV6;
1567 }
1568
1569 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1570 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1571 s->flags |= DEV_OPT_PROMISC;
1572
1573 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1574 s->flags |= DEV_OPT_MULTICAST;
1575 }
1576
1577 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1578 s->rpfilter = strtoul(buf, NULL, 0);
1579 s->flags |= DEV_OPT_RPFILTER;
1580 }
1581
1582 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1583 s->acceptlocal = strtoul(buf, NULL, 0);
1584 s->flags |= DEV_OPT_ACCEPTLOCAL;
1585 }
1586
1587 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1588 s->igmpversion = strtoul(buf, NULL, 0);
1589 s->flags |= DEV_OPT_IGMPVERSION;
1590 }
1591
1592 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1593 s->mldversion = strtoul(buf, NULL, 0);
1594 s->flags |= DEV_OPT_MLDVERSION;
1595 }
1596
1597 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1598 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1599 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1600 }
1601
1602 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1603 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1604 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1605 }
1606
1607 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1608 s->neigh4locktime = strtol(buf, NULL, 0);
1609 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1610 }
1611
1612 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1613 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1614 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1615 }
1616
1617 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1618 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1619 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1620 }
1621
1622 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1623 s->dadtransmits = strtoul(buf, NULL, 0);
1624 s->flags |= DEV_OPT_DADTRANSMITS;
1625 }
1626
1627 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1628 s->sendredirects = strtoul(buf, NULL, 0);
1629 s->flags |= DEV_OPT_SENDREDIRECTS;
1630 }
1631 }
1632
1633 void
1634 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1635 {
1636 struct ifreq ifr;
1637 char buf[12];
1638
1639 memset(&ifr, 0, sizeof(ifr));
1640 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1641 if (s->flags & DEV_OPT_MTU & apply_mask) {
1642 ifr.ifr_mtu = s->mtu;
1643 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1644 s->flags &= ~DEV_OPT_MTU;
1645 }
1646 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1647 system_update_ipv6_mtu(dev, s->mtu6);
1648 }
1649 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1650 ifr.ifr_qlen = s->txqueuelen;
1651 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1652 s->flags &= ~DEV_OPT_TXQUEUELEN;
1653 }
1654 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1655 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1656 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1657 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1658 s->flags &= ~DEV_OPT_MACADDR;
1659 }
1660 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1661 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1662 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1663 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1664 !s->promisc ? IFF_PROMISC : 0) < 0)
1665 s->flags &= ~DEV_OPT_PROMISC;
1666 }
1667 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1668 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1669 system_set_rpfilter(dev, buf);
1670 }
1671 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1672 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1673 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1674 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1675 system_set_igmpversion(dev, buf);
1676 }
1677 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1678 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1679 system_set_mldversion(dev, buf);
1680 }
1681 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1682 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1683 system_set_neigh4reachabletime(dev, buf);
1684 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1685 system_set_neigh6reachabletime(dev, buf);
1686 }
1687 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1688 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1689 system_set_neigh4locktime(dev, buf);
1690 }
1691 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1692 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1693 system_set_neigh4gcstaletime(dev, buf);
1694 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1695 system_set_neigh6gcstaletime(dev, buf);
1696 }
1697 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1698 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1699 system_set_dadtransmits(dev, buf);
1700 }
1701 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1702 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1703 !s->multicast ? IFF_MULTICAST : 0) < 0)
1704 s->flags &= ~DEV_OPT_MULTICAST;
1705 }
1706 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1707 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1708 }
1709
1710 int system_if_up(struct device *dev)
1711 {
1712 system_if_get_settings(dev, &dev->orig_settings);
1713 /* Only keep orig settings based on what needs to be set */
1714 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1715 dev->orig_settings.flags &= dev->settings.flags;
1716 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1717 return system_if_flags(dev->ifname, IFF_UP, 0);
1718 }
1719
1720 int system_if_down(struct device *dev)
1721 {
1722 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1723 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1724 return ret;
1725 }
1726
1727 struct if_check_data {
1728 struct device *dev;
1729 int pending;
1730 int ret;
1731 };
1732
1733 #ifndef IFF_LOWER_UP
1734 #define IFF_LOWER_UP 0x10000
1735 #endif
1736
1737 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1738 {
1739 struct nlmsghdr *nh = nlmsg_hdr(msg);
1740 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1741 struct if_check_data *chk = (struct if_check_data *)arg;
1742
1743 if (nh->nlmsg_type != RTM_NEWLINK)
1744 return NL_SKIP;
1745
1746 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1747 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1748
1749 return NL_OK;
1750 }
1751
1752 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1753 {
1754 struct if_check_data *chk = (struct if_check_data *)arg;
1755 chk->pending = 0;
1756 return NL_STOP;
1757 }
1758
1759 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1760 {
1761 struct if_check_data *chk = (struct if_check_data *)arg;
1762
1763 device_set_present(chk->dev, false);
1764 device_set_link(chk->dev, false);
1765 chk->pending = err->error;
1766
1767 return NL_STOP;
1768 }
1769
1770 int system_if_check(struct device *dev)
1771 {
1772 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1773 struct nl_msg *msg;
1774 struct ifinfomsg ifi = {
1775 .ifi_family = AF_UNSPEC,
1776 .ifi_index = 0,
1777 };
1778 struct if_check_data chk = {
1779 .dev = dev,
1780 .pending = 1,
1781 };
1782 int ret = 1;
1783
1784 if (!cb)
1785 return ret;
1786
1787 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1788 if (!msg)
1789 goto out;
1790
1791 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1792 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1793 goto free;
1794
1795 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1796 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1797 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1798
1799 ret = nl_send_auto_complete(sock_rtnl, msg);
1800 if (ret < 0)
1801 goto free;
1802
1803 while (chk.pending > 0)
1804 nl_recvmsgs(sock_rtnl, cb);
1805
1806 ret = chk.pending;
1807
1808 free:
1809 nlmsg_free(msg);
1810 out:
1811 nl_cb_put(cb);
1812 return ret;
1813 }
1814
1815 struct device *
1816 system_if_get_parent(struct device *dev)
1817 {
1818 char buf[64], *devname;
1819 int ifindex, iflink, len;
1820 FILE *f;
1821
1822 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1823 f = fopen(buf, "r");
1824 if (!f)
1825 return NULL;
1826
1827 len = fread(buf, 1, sizeof(buf) - 1, f);
1828 fclose(f);
1829
1830 if (len <= 0)
1831 return NULL;
1832
1833 buf[len] = 0;
1834 iflink = strtoul(buf, NULL, 0);
1835 ifindex = system_if_resolve(dev);
1836 if (!iflink || iflink == ifindex)
1837 return NULL;
1838
1839 devname = if_indextoname(iflink, buf);
1840 if (!devname)
1841 return NULL;
1842
1843 return device_get(devname, true);
1844 }
1845
1846 static bool
1847 read_string_file(int dir_fd, const char *file, char *buf, int len)
1848 {
1849 bool ret = false;
1850 char *c;
1851 int fd;
1852
1853 fd = openat(dir_fd, file, O_RDONLY);
1854 if (fd < 0)
1855 return false;
1856
1857 retry:
1858 len = read(fd, buf, len - 1);
1859 if (len < 0) {
1860 if (errno == EINTR)
1861 goto retry;
1862 } else if (len > 0) {
1863 buf[len] = 0;
1864
1865 c = strchr(buf, '\n');
1866 if (c)
1867 *c = 0;
1868
1869 ret = true;
1870 }
1871
1872 close(fd);
1873
1874 return ret;
1875 }
1876
1877 static bool
1878 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1879 {
1880 char buf[64];
1881 bool ret = false;
1882
1883 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1884 if (ret)
1885 *val = strtoull(buf, NULL, 0);
1886
1887 return ret;
1888 }
1889
1890 /* Assume advertised flags == supported flags */
1891 static const struct {
1892 uint32_t mask;
1893 const char *name;
1894 } ethtool_link_modes[] = {
1895 { ADVERTISED_10baseT_Half, "10baseT-H" },
1896 { ADVERTISED_10baseT_Full, "10baseT-F" },
1897 { ADVERTISED_100baseT_Half, "100baseT-H" },
1898 { ADVERTISED_100baseT_Full, "100baseT-F" },
1899 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1900 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1901 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1902 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1903 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1904 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1905 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1906 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1907 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1908 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1909 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1910 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1911 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1912 #ifdef ADVERTISED_56000baseKR4_Full
1913 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1914 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1915 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1916 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1917 #endif
1918 };
1919
1920 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1921 {
1922 int i;
1923 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1924 if (mask & ethtool_link_modes[i].mask)
1925 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1926 }
1927 }
1928
1929 bool
1930 system_if_force_external(const char *ifname)
1931 {
1932 char buf[64];
1933 struct stat s;
1934
1935 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1936 return stat(buf, &s) == 0;
1937 }
1938
1939 int
1940 system_if_dump_info(struct device *dev, struct blob_buf *b)
1941 {
1942 struct ethtool_cmd ecmd;
1943 struct ifreq ifr;
1944 char *s;
1945 void *c;
1946
1947 memset(&ecmd, 0, sizeof(ecmd));
1948 memset(&ifr, 0, sizeof(ifr));
1949 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1950 ifr.ifr_data = (caddr_t) &ecmd;
1951 ecmd.cmd = ETHTOOL_GSET;
1952
1953 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1954 c = blobmsg_open_array(b, "link-advertising");
1955 system_add_link_modes(b, ecmd.advertising);
1956 blobmsg_close_array(b, c);
1957
1958 c = blobmsg_open_array(b, "link-partner-advertising");
1959 system_add_link_modes(b, ecmd.lp_advertising);
1960 blobmsg_close_array(b, c);
1961
1962 c = blobmsg_open_array(b, "link-supported");
1963 system_add_link_modes(b, ecmd.supported);
1964 blobmsg_close_array(b, c);
1965
1966 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1967 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1968 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1969 blobmsg_add_string_buffer(b);
1970
1971 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1972 }
1973
1974 return 0;
1975 }
1976
1977 int
1978 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1979 {
1980 const char *const counters[] = {
1981 "collisions", "rx_frame_errors", "tx_compressed",
1982 "multicast", "rx_length_errors", "tx_dropped",
1983 "rx_bytes", "rx_missed_errors", "tx_errors",
1984 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1985 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1986 "rx_dropped", "tx_aborted_errors", "tx_packets",
1987 "rx_errors", "tx_bytes", "tx_window_errors",
1988 "rx_fifo_errors", "tx_carrier_errors",
1989 };
1990 char buf[64];
1991 int stats_dir;
1992 int i;
1993 uint64_t val = 0;
1994
1995 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1996 stats_dir = open(buf, O_DIRECTORY);
1997 if (stats_dir < 0)
1998 return -1;
1999
2000 for (i = 0; i < ARRAY_SIZE(counters); i++)
2001 if (read_uint64_file(stats_dir, counters[i], &val))
2002 blobmsg_add_u64(b, counters[i], val);
2003
2004 close(stats_dir);
2005 return 0;
2006 }
2007
2008 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2009 {
2010 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2011 int alen = v4 ? 4 : 16;
2012 unsigned int flags = 0;
2013 struct ifaddrmsg ifa = {
2014 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2015 .ifa_prefixlen = addr->mask,
2016 .ifa_index = dev->ifindex,
2017 };
2018
2019 struct nl_msg *msg;
2020 if (cmd == RTM_NEWADDR)
2021 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2022
2023 msg = nlmsg_alloc_simple(cmd, flags);
2024 if (!msg)
2025 return -1;
2026
2027 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2028 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2029 if (v4) {
2030 if (addr->broadcast)
2031 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2032 if (addr->point_to_point)
2033 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2034 } else {
2035 time_t now = system_get_rtime();
2036 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2037
2038 if (addr->preferred_until) {
2039 int64_t preferred = addr->preferred_until - now;
2040 if (preferred < 0)
2041 preferred = 0;
2042 else if (preferred > UINT32_MAX)
2043 preferred = UINT32_MAX;
2044
2045 cinfo.ifa_prefered = preferred;
2046 }
2047
2048 if (addr->valid_until) {
2049 int64_t valid = addr->valid_until - now;
2050 if (valid <= 0) {
2051 nlmsg_free(msg);
2052 return -1;
2053 }
2054 else if (valid > UINT32_MAX)
2055 valid = UINT32_MAX;
2056
2057 cinfo.ifa_valid = valid;
2058 }
2059
2060 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2061
2062 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2063 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2064 }
2065
2066 return system_rtnl_call(msg);
2067 }
2068
2069 int system_add_address(struct device *dev, struct device_addr *addr)
2070 {
2071 return system_addr(dev, addr, RTM_NEWADDR);
2072 }
2073
2074 int system_del_address(struct device *dev, struct device_addr *addr)
2075 {
2076 return system_addr(dev, addr, RTM_DELADDR);
2077 }
2078
2079 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2080 {
2081 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2082 unsigned int flags = 0;
2083 struct ndmsg ndm = {
2084 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2085 .ndm_ifindex = dev->ifindex,
2086 .ndm_state = NUD_PERMANENT,
2087 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2088 };
2089 struct nl_msg *msg;
2090
2091 if (cmd == RTM_NEWNEIGH)
2092 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2093
2094 msg = nlmsg_alloc_simple(cmd, flags);
2095
2096 if (!msg)
2097 return -1;
2098
2099 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2100
2101 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2102 if (neighbor->flags & DEVNEIGH_MAC)
2103 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2104
2105
2106 return system_rtnl_call(msg);
2107 }
2108
2109 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2110 {
2111 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2112 }
2113
2114 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2115 {
2116 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2117 }
2118
2119 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2120 {
2121 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2122 bool have_gw;
2123 unsigned int flags = 0;
2124
2125 if (alen == 4)
2126 have_gw = !!route->nexthop.in.s_addr;
2127 else
2128 have_gw = route->nexthop.in6.s6_addr32[0] ||
2129 route->nexthop.in6.s6_addr32[1] ||
2130 route->nexthop.in6.s6_addr32[2] ||
2131 route->nexthop.in6.s6_addr32[3];
2132
2133 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2134 ? route->table : RT_TABLE_MAIN;
2135
2136 struct rtmsg rtm = {
2137 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2138 .rtm_dst_len = route->mask,
2139 .rtm_src_len = route->sourcemask,
2140 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2141 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2142 .rtm_scope = RT_SCOPE_NOWHERE,
2143 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2144 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2145 };
2146 struct nl_msg *msg;
2147
2148 if (cmd == RTM_NEWROUTE) {
2149 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2150
2151 if (!dev) { /* Add null-route */
2152 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2153 rtm.rtm_type = RTN_UNREACHABLE;
2154 }
2155 else
2156 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2157 }
2158
2159 if (route->flags & DEVROUTE_TYPE) {
2160 rtm.rtm_type = route->type;
2161 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2162 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2163 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2164 rtm.rtm_table = RT_TABLE_LOCAL;
2165 }
2166
2167 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2168 rtm.rtm_scope = RT_SCOPE_HOST;
2169 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2170 rtm.rtm_type == RTN_ANYCAST) {
2171 rtm.rtm_scope = RT_SCOPE_LINK;
2172 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2173 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2174 rtm.rtm_type == RTN_THROW) {
2175 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2176 dev = NULL;
2177 }
2178 }
2179
2180 msg = nlmsg_alloc_simple(cmd, flags);
2181 if (!msg)
2182 return -1;
2183
2184 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2185
2186 if (route->mask)
2187 nla_put(msg, RTA_DST, alen, &route->addr);
2188
2189 if (route->sourcemask) {
2190 if (rtm.rtm_family == AF_INET)
2191 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2192 else
2193 nla_put(msg, RTA_SRC, alen, &route->source);
2194 }
2195
2196 if (route->metric > 0)
2197 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2198
2199 if (have_gw)
2200 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2201
2202 if (dev)
2203 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2204
2205 if (table >= 256)
2206 nla_put_u32(msg, RTA_TABLE, table);
2207
2208 if (route->flags & DEVROUTE_MTU) {
2209 struct nlattr *metrics;
2210
2211 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2212 goto nla_put_failure;
2213
2214 nla_put_u32(msg, RTAX_MTU, route->mtu);
2215
2216 nla_nest_end(msg, metrics);
2217 }
2218
2219 return system_rtnl_call(msg);
2220
2221 nla_put_failure:
2222 nlmsg_free(msg);
2223 return -ENOMEM;
2224 }
2225
2226 int system_add_route(struct device *dev, struct device_route *route)
2227 {
2228 return system_rt(dev, route, RTM_NEWROUTE);
2229 }
2230
2231 int system_del_route(struct device *dev, struct device_route *route)
2232 {
2233 return system_rt(dev, route, RTM_DELROUTE);
2234 }
2235
2236 int system_flush_routes(void)
2237 {
2238 const char *names[] = {
2239 "/proc/sys/net/ipv4/route/flush",
2240 "/proc/sys/net/ipv6/route/flush"
2241 };
2242 int fd, i;
2243
2244 for (i = 0; i < ARRAY_SIZE(names); i++) {
2245 fd = open(names[i], O_WRONLY);
2246 if (fd < 0)
2247 continue;
2248
2249 if (write(fd, "-1", 2)) {}
2250 close(fd);
2251 }
2252 return 0;
2253 }
2254
2255 bool system_resolve_rt_type(const char *type, unsigned int *id)
2256 {
2257 return system_rtn_aton(type, id);
2258 }
2259
2260 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2261 {
2262 FILE *f;
2263 char *e, buf[128];
2264 unsigned int n, proto = 256;
2265 n = strtoul(type, &e, 0);
2266 if (!*e && e != type)
2267 proto = n;
2268 else if (!strcmp(type, "unspec"))
2269 proto = RTPROT_UNSPEC;
2270 else if (!strcmp(type, "kernel"))
2271 proto = RTPROT_KERNEL;
2272 else if (!strcmp(type, "boot"))
2273 proto = RTPROT_BOOT;
2274 else if (!strcmp(type, "static"))
2275 proto = RTPROT_STATIC;
2276 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2277 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2278 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2279 continue;
2280
2281 n = strtoul(e, NULL, 10);
2282 e = strtok(NULL, " \t\n");
2283
2284 if (e && !strcmp(e, type)) {
2285 proto = n;
2286 break;
2287 }
2288 }
2289 fclose(f);
2290 }
2291
2292 if (proto > 255)
2293 return false;
2294
2295 *id = proto;
2296 return true;
2297 }
2298
2299 bool system_resolve_rt_table(const char *name, unsigned int *id)
2300 {
2301 FILE *f;
2302 char *e, buf[128];
2303 unsigned int n, table = RT_TABLE_UNSPEC;
2304
2305 /* first try to parse table as number */
2306 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2307 table = n;
2308
2309 /* handle well known aliases */
2310 else if (!strcmp(name, "default"))
2311 table = RT_TABLE_DEFAULT;
2312 else if (!strcmp(name, "main"))
2313 table = RT_TABLE_MAIN;
2314 else if (!strcmp(name, "local"))
2315 table = RT_TABLE_LOCAL;
2316
2317 /* try to look up name in /etc/iproute2/rt_tables */
2318 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2319 {
2320 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2321 {
2322 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2323 continue;
2324
2325 n = strtoul(e, NULL, 10);
2326 e = strtok(NULL, " \t\n");
2327
2328 if (e && !strcmp(e, name))
2329 {
2330 table = n;
2331 break;
2332 }
2333 }
2334
2335 fclose(f);
2336 }
2337
2338 if (table == RT_TABLE_UNSPEC)
2339 return false;
2340
2341 *id = table;
2342 return true;
2343 }
2344
2345 bool system_is_default_rt_table(unsigned int id)
2346 {
2347 return (id == RT_TABLE_MAIN);
2348 }
2349
2350 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2351 {
2352 char *e;
2353 unsigned int n;
2354
2355 if (!strcmp(filter, "strict"))
2356 n = 1;
2357 else if (!strcmp(filter, "loose"))
2358 n = 2;
2359 else {
2360 n = strtoul(filter, &e, 0);
2361 if (*e || e == filter || n > 2)
2362 return false;
2363 }
2364
2365 *id = n;
2366 return true;
2367 }
2368
2369 static int system_iprule(struct iprule *rule, int cmd)
2370 {
2371 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2372
2373 struct nl_msg *msg;
2374 struct rtmsg rtm = {
2375 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2376 .rtm_protocol = RTPROT_STATIC,
2377 .rtm_scope = RT_SCOPE_UNIVERSE,
2378 .rtm_table = RT_TABLE_UNSPEC,
2379 .rtm_type = RTN_UNSPEC,
2380 .rtm_flags = 0,
2381 };
2382
2383 if (cmd == RTM_NEWRULE)
2384 rtm.rtm_type = RTN_UNICAST;
2385
2386 if (rule->invert)
2387 rtm.rtm_flags |= FIB_RULE_INVERT;
2388
2389 if (rule->flags & IPRULE_SRC)
2390 rtm.rtm_src_len = rule->src_mask;
2391
2392 if (rule->flags & IPRULE_DEST)
2393 rtm.rtm_dst_len = rule->dest_mask;
2394
2395 if (rule->flags & IPRULE_TOS)
2396 rtm.rtm_tos = rule->tos;
2397
2398 if (rule->flags & IPRULE_LOOKUP) {
2399 if (rule->lookup < 256)
2400 rtm.rtm_table = rule->lookup;
2401 }
2402
2403 if (rule->flags & IPRULE_ACTION)
2404 rtm.rtm_type = rule->action;
2405 else if (rule->flags & IPRULE_GOTO)
2406 rtm.rtm_type = FR_ACT_GOTO;
2407 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2408 rtm.rtm_type = FR_ACT_NOP;
2409
2410 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2411
2412 if (!msg)
2413 return -1;
2414
2415 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2416
2417 if (rule->flags & IPRULE_IN)
2418 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2419
2420 if (rule->flags & IPRULE_OUT)
2421 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2422
2423 if (rule->flags & IPRULE_SRC)
2424 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2425
2426 if (rule->flags & IPRULE_DEST)
2427 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2428
2429 if (rule->flags & IPRULE_PRIORITY)
2430 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2431 else if (cmd == RTM_NEWRULE)
2432 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2433
2434 if (rule->flags & IPRULE_FWMARK)
2435 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2436
2437 if (rule->flags & IPRULE_FWMASK)
2438 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2439
2440 if (rule->flags & IPRULE_LOOKUP) {
2441 if (rule->lookup >= 256)
2442 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2443 }
2444
2445 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2446 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2447
2448 if (rule->flags & IPRULE_GOTO)
2449 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2450
2451 return system_rtnl_call(msg);
2452 }
2453
2454 int system_add_iprule(struct iprule *rule)
2455 {
2456 return system_iprule(rule, RTM_NEWRULE);
2457 }
2458
2459 int system_del_iprule(struct iprule *rule)
2460 {
2461 return system_iprule(rule, RTM_DELRULE);
2462 }
2463
2464 int system_flush_iprules(void)
2465 {
2466 int rv = 0;
2467 struct iprule rule;
2468
2469 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2470 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2471
2472 memset(&rule, 0, sizeof(rule));
2473
2474
2475 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2476
2477 rule.priority = 0;
2478 rule.lookup = RT_TABLE_LOCAL;
2479 rv |= system_iprule(&rule, RTM_NEWRULE);
2480
2481 rule.priority = 32766;
2482 rule.lookup = RT_TABLE_MAIN;
2483 rv |= system_iprule(&rule, RTM_NEWRULE);
2484
2485 rule.priority = 32767;
2486 rule.lookup = RT_TABLE_DEFAULT;
2487 rv |= system_iprule(&rule, RTM_NEWRULE);
2488
2489
2490 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2491
2492 rule.priority = 0;
2493 rule.lookup = RT_TABLE_LOCAL;
2494 rv |= system_iprule(&rule, RTM_NEWRULE);
2495
2496 rule.priority = 32766;
2497 rule.lookup = RT_TABLE_MAIN;
2498 rv |= system_iprule(&rule, RTM_NEWRULE);
2499
2500 return rv;
2501 }
2502
2503 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2504 {
2505 return system_rtn_aton(action, id);
2506 }
2507
2508 time_t system_get_rtime(void)
2509 {
2510 struct timespec ts;
2511 struct timeval tv;
2512
2513 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2514 return ts.tv_sec;
2515
2516 if (gettimeofday(&tv, NULL) == 0)
2517 return tv.tv_sec;
2518
2519 return 0;
2520 }
2521
2522 #ifndef IP_DF
2523 #define IP_DF 0x4000
2524 #endif
2525
2526 static int tunnel_ioctl(const char *name, int cmd, void *p)
2527 {
2528 struct ifreq ifr;
2529
2530 memset(&ifr, 0, sizeof(ifr));
2531 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2532 ifr.ifr_ifru.ifru_data = p;
2533 return ioctl(sock_ioctl, cmd, &ifr);
2534 }
2535
2536 #ifdef IFLA_IPTUN_MAX
2537 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2538 struct blob_attr **tb)
2539 {
2540 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2541 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2542 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2543 struct blob_attr *cur;
2544 int ret = 0, ttl = 0;
2545
2546 if (!nlm)
2547 return -1;
2548
2549 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2550 nla_put_string(nlm, IFLA_IFNAME, name);
2551
2552 if (link)
2553 nla_put_u32(nlm, IFLA_LINK, link);
2554
2555 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2556 if (!linkinfo) {
2557 ret = -ENOMEM;
2558 goto failure;
2559 }
2560
2561 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2562 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2563 if (!infodata) {
2564 ret = -ENOMEM;
2565 goto failure;
2566 }
2567
2568 if (link)
2569 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2570
2571 if ((cur = tb[TUNNEL_ATTR_TTL]))
2572 ttl = blobmsg_get_u32(cur);
2573
2574 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2575 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2576
2577 struct in6_addr in6buf;
2578 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2579 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2580 ret = -EINVAL;
2581 goto failure;
2582 }
2583 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2584 }
2585
2586 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2587 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2588 ret = -EINVAL;
2589 goto failure;
2590 }
2591 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2592 }
2593
2594 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2595 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2596 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2597
2598 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2599 blobmsg_data(cur), blobmsg_len(cur));
2600
2601 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2602 char *str = blobmsg_get_string(cur);
2603
2604 if (strcmp(str, "ignore")) {
2605 char *e;
2606 unsigned encap_limit = strtoul(str, &e, 0);
2607
2608 if (e == str || *e || encap_limit > 255) {
2609 ret = -EINVAL;
2610 goto failure;
2611 }
2612
2613 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2614 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2615 }
2616 }
2617
2618 #ifdef IFLA_IPTUN_FMR_MAX
2619 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2620 struct blob_attr *rcur;
2621 unsigned rrem, fmrcnt = 0;
2622 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2623
2624 if (!fmrs) {
2625 ret = -ENOMEM;
2626 goto failure;
2627 }
2628
2629 blobmsg_for_each_attr(rcur, cur, rrem) {
2630 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2631 struct in6_addr ip6prefix;
2632 struct in_addr ip4prefix;
2633 unsigned ip4len, ip6len, ealen, offset;
2634
2635 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2636 blobmsg_data(rcur), blobmsg_len(rcur));
2637
2638 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2639 !parse_ip_and_netmask(AF_INET6,
2640 blobmsg_data(tb_cur), &ip6prefix,
2641 &ip6len)) {
2642 ret = -EINVAL;
2643 goto failure;
2644 }
2645
2646 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2647 !parse_ip_and_netmask(AF_INET,
2648 blobmsg_data(tb_cur), &ip4prefix,
2649 &ip4len)) {
2650 ret = -EINVAL;
2651 goto failure;
2652 }
2653
2654 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2655 ret = -EINVAL;
2656 goto failure;
2657 }
2658 ealen = blobmsg_get_u32(tb_cur);
2659
2660 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2661 ret = -EINVAL;
2662 goto failure;
2663 }
2664 offset = blobmsg_get_u32(tb_cur);
2665
2666 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2667 if (!rule) {
2668 ret = -ENOMEM;
2669 goto failure;
2670 }
2671
2672 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2673 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2674 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2675 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2676 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2677 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2678
2679 nla_nest_end(nlm, rule);
2680 }
2681
2682 nla_nest_end(nlm, fmrs);
2683 }
2684 #endif
2685 if (tun_flags)
2686 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2687 }
2688
2689 nla_nest_end(nlm, infodata);
2690 nla_nest_end(nlm, linkinfo);
2691
2692 return system_rtnl_call(nlm);
2693
2694 failure:
2695 nlmsg_free(nlm);
2696 return ret;
2697 }
2698 #endif
2699
2700 #ifdef IFLA_IPTUN_MAX
2701 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2702 static int system_add_gre_tunnel(const char *name, const char *kind,
2703 const unsigned int link, struct blob_attr **tb, bool v6)
2704 {
2705 struct nl_msg *nlm;
2706 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2707 struct blob_attr *cur;
2708 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2709 uint16_t iflags = 0, oflags = 0;
2710 uint8_t tos = 0;
2711 int ret = 0, ttl = 0;
2712 unsigned encap_limit = 0;
2713
2714 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2715 if (!nlm)
2716 return -1;
2717
2718 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2719 nla_put_string(nlm, IFLA_IFNAME, name);
2720
2721 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2722 if (!linkinfo) {
2723 ret = -ENOMEM;
2724 goto failure;
2725 }
2726
2727 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2728 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2729 if (!infodata) {
2730 ret = -ENOMEM;
2731 goto failure;
2732 }
2733
2734 if (link)
2735 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2736
2737 if ((cur = tb[TUNNEL_ATTR_TTL]))
2738 ttl = blobmsg_get_u32(cur);
2739
2740 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2741 char *str = blobmsg_get_string(cur);
2742 if (strcmp(str, "inherit")) {
2743 unsigned uval;
2744
2745 if (!system_tos_aton(str, &uval)) {
2746 ret = -EINVAL;
2747 goto failure;
2748 }
2749
2750 if (v6)
2751 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2752 else
2753 tos = uval;
2754 } else {
2755 if (v6)
2756 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2757 else
2758 tos = 1;
2759 }
2760 }
2761
2762 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2763 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2764
2765 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2766 blobmsg_data(cur), blobmsg_len(cur));
2767
2768 if ((cur = tb_data[GRE_DATA_IKEY])) {
2769 if ((ikey = blobmsg_get_u32(cur)))
2770 iflags |= GRE_KEY;
2771 }
2772
2773 if ((cur = tb_data[GRE_DATA_OKEY])) {
2774 if ((okey = blobmsg_get_u32(cur)))
2775 oflags |= GRE_KEY;
2776 }
2777
2778 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2779 if (blobmsg_get_bool(cur))
2780 iflags |= GRE_CSUM;
2781 }
2782
2783 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2784 if (blobmsg_get_bool(cur))
2785 oflags |= GRE_CSUM;
2786 }
2787
2788 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2789 if (blobmsg_get_bool(cur))
2790 iflags |= GRE_SEQ;
2791 }
2792
2793 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2794 if (blobmsg_get_bool(cur))
2795 oflags |= GRE_SEQ;
2796 }
2797
2798 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2799 char *str = blobmsg_get_string(cur);
2800
2801 if (strcmp(str, "ignore")) {
2802 char *e;
2803
2804 encap_limit = strtoul(str, &e, 0);
2805
2806 if (e == str || *e || encap_limit > 255) {
2807 ret = -EINVAL;
2808 goto failure;
2809 }
2810
2811 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2812 }
2813 }
2814 }
2815
2816 if (v6) {
2817 struct in6_addr in6buf;
2818 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2819 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2820 ret = -EINVAL;
2821 goto failure;
2822 }
2823 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2824 }
2825
2826 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2827 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2828 ret = -EINVAL;
2829 goto failure;
2830 }
2831 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2832 }
2833
2834 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2835 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2836
2837 if (flowinfo)
2838 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2839
2840 if (flags6)
2841 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2842
2843 if (!ttl)
2844 ttl = 64;
2845 } else {
2846 struct in_addr inbuf;
2847 bool set_df = true;
2848
2849 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2850 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2851 ret = -EINVAL;
2852 goto failure;
2853 }
2854 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2855 }
2856
2857 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2858 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2859 ret = -EINVAL;
2860 goto failure;
2861 }
2862 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2863
2864 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2865 if (!okey) {
2866 okey = inbuf.s_addr;
2867 oflags |= GRE_KEY;
2868 }
2869
2870 if (!ikey) {
2871 ikey = inbuf.s_addr;
2872 iflags |= GRE_KEY;
2873 }
2874 }
2875 }
2876
2877 if ((cur = tb[TUNNEL_ATTR_DF]))
2878 set_df = blobmsg_get_bool(cur);
2879
2880 if (!set_df) {
2881 /* ttl != 0 and nopmtudisc are incompatible */
2882 if (ttl) {
2883 ret = -EINVAL;
2884 goto failure;
2885 }
2886 } else if (!ttl)
2887 ttl = 64;
2888
2889 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2890
2891 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2892 }
2893
2894 if (ttl)
2895 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2896
2897 if (oflags)
2898 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2899
2900 if (iflags)
2901 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2902
2903 if (okey)
2904 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2905
2906 if (ikey)
2907 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2908
2909 nla_nest_end(nlm, infodata);
2910 nla_nest_end(nlm, linkinfo);
2911
2912 return system_rtnl_call(nlm);
2913
2914 failure:
2915 nlmsg_free(nlm);
2916 return ret;
2917 }
2918 #endif
2919
2920 #ifdef IFLA_VTI_MAX
2921 static int system_add_vti_tunnel(const char *name, const char *kind,
2922 const unsigned int link, struct blob_attr **tb, bool v6)
2923 {
2924 struct nl_msg *nlm;
2925 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2926 struct blob_attr *cur;
2927 int ret = 0;
2928
2929 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2930 if (!nlm)
2931 return -1;
2932
2933 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2934 nla_put_string(nlm, IFLA_IFNAME, name);
2935
2936 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2937 if (!linkinfo) {
2938 ret = -ENOMEM;
2939 goto failure;
2940 }
2941
2942 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2943 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2944 if (!infodata) {
2945 ret = -ENOMEM;
2946 goto failure;
2947 }
2948
2949 if (link)
2950 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2951
2952 if (v6) {
2953 struct in6_addr in6buf;
2954 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2955 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2956 ret = -EINVAL;
2957 goto failure;
2958 }
2959 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2960 }
2961
2962 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2963 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2964 ret = -EINVAL;
2965 goto failure;
2966 }
2967 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2968 }
2969
2970 } else {
2971 struct in_addr inbuf;
2972
2973 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2974 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2975 ret = -EINVAL;
2976 goto failure;
2977 }
2978 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2979 }
2980
2981 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2982 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2983 ret = -EINVAL;
2984 goto failure;
2985 }
2986 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2987 }
2988
2989 }
2990
2991 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2992 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2993 uint32_t ikey = 0, okey = 0;
2994
2995 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2996 blobmsg_data(cur), blobmsg_len(cur));
2997
2998 if ((cur = tb_data[VTI_DATA_IKEY])) {
2999 if ((ikey = blobmsg_get_u32(cur)))
3000 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3001 }
3002
3003 if ((cur = tb_data[VTI_DATA_OKEY])) {
3004 if ((okey = blobmsg_get_u32(cur)))
3005 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3006 }
3007 }
3008
3009 nla_nest_end(nlm, infodata);
3010 nla_nest_end(nlm, linkinfo);
3011
3012 return system_rtnl_call(nlm);
3013
3014 failure:
3015 nlmsg_free(nlm);
3016 return ret;
3017 }
3018 #endif
3019
3020 #ifdef IFLA_XFRM_MAX
3021 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3022 const unsigned int link, struct blob_attr **tb)
3023 {
3024 struct nl_msg *nlm;
3025 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3026 struct blob_attr *cur;
3027 int ret = 0;
3028
3029 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3030 if (!nlm)
3031 return -1;
3032
3033 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3034 nla_put_string(nlm, IFLA_IFNAME, name);
3035
3036 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3037 if (!linkinfo) {
3038 ret = -ENOMEM;
3039 goto failure;
3040 }
3041
3042 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3043 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3044 if (!infodata) {
3045 ret = -ENOMEM;
3046 goto failure;
3047 }
3048
3049 if (link)
3050 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3051
3052 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3053 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3054 uint32_t if_id = 0;
3055
3056 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3057 blobmsg_data(cur), blobmsg_len(cur));
3058
3059 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3060 if ((if_id = blobmsg_get_u32(cur)))
3061 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3062 }
3063
3064 }
3065
3066 nla_nest_end(nlm, infodata);
3067 nla_nest_end(nlm, linkinfo);
3068
3069 return system_rtnl_call(nlm);
3070
3071 failure:
3072 nlmsg_free(nlm);
3073 return ret;
3074 }
3075 #endif
3076
3077 #ifdef IFLA_VXLAN_MAX
3078 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3079 struct blob_attr *cur;
3080 if ((cur = tb_data[vxlandatatype])) {
3081 bool val = blobmsg_get_bool(cur);
3082 if (invert)
3083 val = !val;
3084
3085 if ((attrtype == IFLA_VXLAN_GBP) && val)
3086 nla_put_flag(msg, attrtype);
3087 else
3088 nla_put_u8(msg, attrtype, val);
3089
3090 }
3091 }
3092
3093 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3094 {
3095 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3096 struct nl_msg *msg;
3097 struct nlattr *linkinfo, *data;
3098 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3099 struct blob_attr *cur;
3100 int ret = 0;
3101
3102 if ((cur = tb[TUNNEL_ATTR_DATA]))
3103 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3104 blobmsg_data(cur), blobmsg_len(cur));
3105 else
3106 return -EINVAL;
3107
3108 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3109
3110 if (!msg)
3111 return -1;
3112
3113 nlmsg_append(msg, &iim, sizeof(iim), 0);
3114
3115 nla_put_string(msg, IFLA_IFNAME, name);
3116
3117 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3118 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3119 if (!ea) {
3120 ret = -EINVAL;
3121 goto failure;
3122 }
3123
3124 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3125 }
3126
3127 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3128 uint32_t mtu = blobmsg_get_u32(cur);
3129 nla_put_u32(msg, IFLA_MTU, mtu);
3130 }
3131
3132 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3133 ret = -ENOMEM;
3134 goto failure;
3135 }
3136
3137 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3138
3139 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3140 ret = -ENOMEM;
3141 goto failure;
3142 }
3143
3144 if (link)
3145 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3146
3147 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3148 uint32_t id = blobmsg_get_u32(cur);
3149 if (id >= (1u << 24) - 1) {
3150 ret = -EINVAL;
3151 goto failure;
3152 }
3153
3154 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3155 }
3156
3157 if (v6) {
3158 struct in6_addr in6buf;
3159 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3160 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3161 ret = -EINVAL;
3162 goto failure;
3163 }
3164 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3165 }
3166
3167 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3168 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3169 ret = -EINVAL;
3170 goto failure;
3171 }
3172 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3173 }
3174 } else {
3175 struct in_addr inbuf;
3176
3177 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3178 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3179 ret = -EINVAL;
3180 goto failure;
3181 }
3182 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3183 }
3184
3185 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3186 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3187 ret = -EINVAL;
3188 goto failure;
3189 }
3190 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3191 }
3192 }
3193
3194 uint32_t port = 4789;
3195 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3196 port = blobmsg_get_u32(cur);
3197 if (port < 1 || port > 65535) {
3198 ret = -EINVAL;
3199 goto failure;
3200 }
3201 }
3202 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3203
3204 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3205 struct ifla_vxlan_port_range srcports = {0,0};
3206
3207 uint32_t low = blobmsg_get_u32(cur);
3208 if (low < 1 || low > 65535 - 1) {
3209 ret = -EINVAL;
3210 goto failure;
3211 }
3212
3213 srcports.low = htons((uint16_t) low);
3214 srcports.high = htons((uint16_t) (low+1));
3215
3216 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3217 uint32_t high = blobmsg_get_u32(cur);
3218 if (high < 1 || high > 65535) {
3219 ret = -EINVAL;
3220 goto failure;
3221 }
3222
3223 if (high > low)
3224 srcports.high = htons((uint16_t) high);
3225 }
3226
3227 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3228 }
3229
3230 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3231 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3232 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3233 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3234 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3235 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3236 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3237 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3238 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3239
3240 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3241 uint32_t ageing = blobmsg_get_u32(cur);
3242 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3243 }
3244
3245 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3246 uint32_t maxaddress = blobmsg_get_u32(cur);
3247 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3248 }
3249
3250 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3251 char *str = blobmsg_get_string(cur);
3252 unsigned tos = 1;
3253
3254 if (strcmp(str, "inherit")) {
3255 if (!system_tos_aton(str, &tos)) {
3256 ret = -EINVAL;
3257 goto failure;
3258 }
3259 }
3260
3261 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3262 }
3263
3264 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3265 uint32_t ttl = blobmsg_get_u32(cur);
3266 if (ttl < 1 || ttl > 255) {
3267 ret = -EINVAL;
3268 goto failure;
3269 }
3270
3271 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3272 }
3273
3274 nla_nest_end(msg, data);
3275 nla_nest_end(msg, linkinfo);
3276
3277 ret = system_rtnl_call(msg);
3278 if (ret)
3279 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3280
3281 return ret;
3282
3283 failure:
3284 nlmsg_free(msg);
3285 return ret;
3286 }
3287 #endif
3288
3289 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3290 {
3291 struct blob_attr *cur;
3292 int ret = 0;
3293
3294 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3295 return -1;
3296
3297 #ifdef SIOCADD6RD
3298 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3299 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3300 unsigned int mask;
3301 struct ip_tunnel_6rd p6;
3302
3303 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3304 blobmsg_data(cur), blobmsg_len(cur));
3305
3306 memset(&p6, 0, sizeof(p6));
3307
3308 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3309 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3310 &p6.prefix, &mask) || mask > 128) {
3311 ret = -EINVAL;
3312 goto failure;
3313 }
3314
3315 p6.prefixlen = mask;
3316 }
3317
3318 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3319 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3320 &p6.relay_prefix, &mask) || mask > 32) {
3321 ret = -EINVAL;
3322 goto failure;
3323 }
3324
3325 p6.relay_prefixlen = mask;
3326 }
3327
3328 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3329 ret = -1;
3330 goto failure;
3331 }
3332 }
3333 #endif
3334
3335 return ret;
3336
3337 failure:
3338 __system_del_ip_tunnel(name, tb);
3339 return ret;
3340 }
3341
3342 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3343 {
3344 struct blob_attr *cur;
3345 bool set_df = true;
3346 struct ip_tunnel_parm p = {
3347 .link = link,
3348 .iph = {
3349 .version = 4,
3350 .ihl = 5,
3351 .protocol = proto,
3352 }
3353 };
3354
3355 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3356 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3357 return -EINVAL;
3358
3359 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3360 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3361 return -EINVAL;
3362
3363 if ((cur = tb[TUNNEL_ATTR_DF]))
3364 set_df = blobmsg_get_bool(cur);
3365
3366 if ((cur = tb[TUNNEL_ATTR_TTL]))
3367 p.iph.ttl = blobmsg_get_u32(cur);
3368
3369 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3370 char *str = blobmsg_get_string(cur);
3371 if (strcmp(str, "inherit")) {
3372 unsigned uval;
3373
3374 if (!system_tos_aton(str, &uval))
3375 return -EINVAL;
3376
3377 p.iph.tos = uval;
3378 } else
3379 p.iph.tos = 1;
3380 }
3381
3382 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3383 /* ttl !=0 and nopmtudisc are incompatible */
3384 if (p.iph.ttl && p.iph.frag_off == 0)
3385 return -EINVAL;
3386
3387 strncpy(p.name, name, sizeof(p.name) - 1);
3388
3389 switch (p.iph.protocol) {
3390 case IPPROTO_IPIP:
3391 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3392 case IPPROTO_IPV6:
3393 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3394 default:
3395 break;
3396 }
3397 return -1;
3398 }
3399
3400 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3401 {
3402 struct blob_attr *cur;
3403 const char *str;
3404
3405 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3406 return -EINVAL;
3407 str = blobmsg_data(cur);
3408
3409 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3410 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3411 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3412 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3413 !strcmp(str, "xfrm"))
3414 return system_link_del(name);
3415 else
3416 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3417 }
3418
3419 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3420 {
3421 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3422
3423 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3424 blob_data(attr), blob_len(attr));
3425
3426 return __system_del_ip_tunnel(name, tb);
3427 }
3428
3429 int system_update_ipv6_mtu(struct device *dev, int mtu)
3430 {
3431 int ret = -1;
3432 char buf[64];
3433 int fd;
3434
3435 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3436 dev->ifname);
3437
3438 fd = open(buf, O_RDWR);
3439 if (fd < 0)
3440 return ret;
3441
3442 if (!mtu) {
3443 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3444 if (len < 0)
3445 goto out;
3446
3447 buf[len] = 0;
3448 ret = atoi(buf);
3449 } else {
3450 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3451 ret = mtu;
3452 }
3453
3454 out:
3455 close(fd);
3456 return ret;
3457 }
3458
3459 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3460 {
3461 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3462 struct blob_attr *cur;
3463 const char *str;
3464
3465 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3466 blob_data(attr), blob_len(attr));
3467
3468 __system_del_ip_tunnel(name, tb);
3469
3470 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3471 return -EINVAL;
3472 str = blobmsg_data(cur);
3473
3474 unsigned int ttl = 0;
3475 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3476 ttl = blobmsg_get_u32(cur);
3477 if (ttl > 255)
3478 return -EINVAL;
3479 }
3480
3481 unsigned int link = 0;
3482 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3483 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3484 if (!iface)
3485 return -EINVAL;
3486
3487 if (iface->l3_dev.dev)
3488 link = iface->l3_dev.dev->ifindex;
3489 }
3490
3491 if (!strcmp(str, "sit"))
3492 return system_add_sit_tunnel(name, link, tb);
3493 #ifdef IFLA_IPTUN_MAX
3494 else if (!strcmp(str, "ipip6")) {
3495 return system_add_ip6_tunnel(name, link, tb);
3496 } else if (!strcmp(str, "greip")) {
3497 return system_add_gre_tunnel(name, "gre", link, tb, false);
3498 } else if (!strcmp(str, "gretapip")) {
3499 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3500 } else if (!strcmp(str, "greip6")) {
3501 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3502 } else if (!strcmp(str, "gretapip6")) {
3503 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3504 #ifdef IFLA_VTI_MAX
3505 } else if (!strcmp(str, "vtiip")) {
3506 return system_add_vti_tunnel(name, "vti", link, tb, false);
3507 } else if (!strcmp(str, "vtiip6")) {
3508 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3509 #endif
3510 #ifdef IFLA_XFRM_MAX
3511 } else if (!strcmp(str, "xfrm")) {
3512 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3513 #endif
3514 #ifdef IFLA_VXLAN_MAX
3515 } else if(!strcmp(str, "vxlan")) {
3516 return system_add_vxlan(name, link, tb, false);
3517 } else if(!strcmp(str, "vxlan6")) {
3518 return system_add_vxlan(name, link, tb, true);
3519 #endif
3520 #endif
3521 } else if (!strcmp(str, "ipip")) {
3522 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3523 }
3524 else
3525 return -EINVAL;
3526
3527 return 0;
3528 }
OpenWrt Network interface configuration daemon