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system-linux: only overwrite dev->present state on check_state for simple devices
[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 if (chk->dev->type == &simple_device_type)
1747 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1748 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1749
1750 return NL_OK;
1751 }
1752
1753 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1754 {
1755 struct if_check_data *chk = (struct if_check_data *)arg;
1756 chk->pending = 0;
1757 return NL_STOP;
1758 }
1759
1760 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1761 {
1762 struct if_check_data *chk = (struct if_check_data *)arg;
1763
1764 if (chk->dev->type == &simple_device_type)
1765 device_set_present(chk->dev, false);
1766 device_set_link(chk->dev, false);
1767 chk->pending = err->error;
1768
1769 return NL_STOP;
1770 }
1771
1772 int system_if_check(struct device *dev)
1773 {
1774 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1775 struct nl_msg *msg;
1776 struct ifinfomsg ifi = {
1777 .ifi_family = AF_UNSPEC,
1778 .ifi_index = 0,
1779 };
1780 struct if_check_data chk = {
1781 .dev = dev,
1782 .pending = 1,
1783 };
1784 int ret = 1;
1785
1786 if (!cb)
1787 return ret;
1788
1789 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1790 if (!msg)
1791 goto out;
1792
1793 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1794 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1795 goto free;
1796
1797 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1798 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1799 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1800
1801 ret = nl_send_auto_complete(sock_rtnl, msg);
1802 if (ret < 0)
1803 goto free;
1804
1805 while (chk.pending > 0)
1806 nl_recvmsgs(sock_rtnl, cb);
1807
1808 ret = chk.pending;
1809
1810 free:
1811 nlmsg_free(msg);
1812 out:
1813 nl_cb_put(cb);
1814 return ret;
1815 }
1816
1817 struct device *
1818 system_if_get_parent(struct device *dev)
1819 {
1820 char buf[64], *devname;
1821 int ifindex, iflink, len;
1822 FILE *f;
1823
1824 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1825 f = fopen(buf, "r");
1826 if (!f)
1827 return NULL;
1828
1829 len = fread(buf, 1, sizeof(buf) - 1, f);
1830 fclose(f);
1831
1832 if (len <= 0)
1833 return NULL;
1834
1835 buf[len] = 0;
1836 iflink = strtoul(buf, NULL, 0);
1837 ifindex = system_if_resolve(dev);
1838 if (!iflink || iflink == ifindex)
1839 return NULL;
1840
1841 devname = if_indextoname(iflink, buf);
1842 if (!devname)
1843 return NULL;
1844
1845 return device_get(devname, true);
1846 }
1847
1848 static bool
1849 read_string_file(int dir_fd, const char *file, char *buf, int len)
1850 {
1851 bool ret = false;
1852 char *c;
1853 int fd;
1854
1855 fd = openat(dir_fd, file, O_RDONLY);
1856 if (fd < 0)
1857 return false;
1858
1859 retry:
1860 len = read(fd, buf, len - 1);
1861 if (len < 0) {
1862 if (errno == EINTR)
1863 goto retry;
1864 } else if (len > 0) {
1865 buf[len] = 0;
1866
1867 c = strchr(buf, '\n');
1868 if (c)
1869 *c = 0;
1870
1871 ret = true;
1872 }
1873
1874 close(fd);
1875
1876 return ret;
1877 }
1878
1879 static bool
1880 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1881 {
1882 char buf[64];
1883 bool ret = false;
1884
1885 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1886 if (ret)
1887 *val = strtoull(buf, NULL, 0);
1888
1889 return ret;
1890 }
1891
1892 /* Assume advertised flags == supported flags */
1893 static const struct {
1894 uint32_t mask;
1895 const char *name;
1896 } ethtool_link_modes[] = {
1897 { ADVERTISED_10baseT_Half, "10baseT-H" },
1898 { ADVERTISED_10baseT_Full, "10baseT-F" },
1899 { ADVERTISED_100baseT_Half, "100baseT-H" },
1900 { ADVERTISED_100baseT_Full, "100baseT-F" },
1901 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1902 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1903 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1904 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1905 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1906 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1907 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1908 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1909 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1910 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1911 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1912 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1913 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1914 #ifdef ADVERTISED_56000baseKR4_Full
1915 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1916 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1917 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1918 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1919 #endif
1920 };
1921
1922 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1923 {
1924 int i;
1925 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1926 if (mask & ethtool_link_modes[i].mask)
1927 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1928 }
1929 }
1930
1931 bool
1932 system_if_force_external(const char *ifname)
1933 {
1934 char buf[64];
1935 struct stat s;
1936
1937 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1938 return stat(buf, &s) == 0;
1939 }
1940
1941 int
1942 system_if_dump_info(struct device *dev, struct blob_buf *b)
1943 {
1944 struct ethtool_cmd ecmd;
1945 struct ifreq ifr;
1946 char *s;
1947 void *c;
1948
1949 memset(&ecmd, 0, sizeof(ecmd));
1950 memset(&ifr, 0, sizeof(ifr));
1951 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1952 ifr.ifr_data = (caddr_t) &ecmd;
1953 ecmd.cmd = ETHTOOL_GSET;
1954
1955 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1956 c = blobmsg_open_array(b, "link-advertising");
1957 system_add_link_modes(b, ecmd.advertising);
1958 blobmsg_close_array(b, c);
1959
1960 c = blobmsg_open_array(b, "link-partner-advertising");
1961 system_add_link_modes(b, ecmd.lp_advertising);
1962 blobmsg_close_array(b, c);
1963
1964 c = blobmsg_open_array(b, "link-supported");
1965 system_add_link_modes(b, ecmd.supported);
1966 blobmsg_close_array(b, c);
1967
1968 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1969 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1970 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1971 blobmsg_add_string_buffer(b);
1972
1973 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1974 }
1975
1976 return 0;
1977 }
1978
1979 int
1980 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1981 {
1982 const char *const counters[] = {
1983 "collisions", "rx_frame_errors", "tx_compressed",
1984 "multicast", "rx_length_errors", "tx_dropped",
1985 "rx_bytes", "rx_missed_errors", "tx_errors",
1986 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1987 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1988 "rx_dropped", "tx_aborted_errors", "tx_packets",
1989 "rx_errors", "tx_bytes", "tx_window_errors",
1990 "rx_fifo_errors", "tx_carrier_errors",
1991 };
1992 char buf[64];
1993 int stats_dir;
1994 int i;
1995 uint64_t val = 0;
1996
1997 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1998 stats_dir = open(buf, O_DIRECTORY);
1999 if (stats_dir < 0)
2000 return -1;
2001
2002 for (i = 0; i < ARRAY_SIZE(counters); i++)
2003 if (read_uint64_file(stats_dir, counters[i], &val))
2004 blobmsg_add_u64(b, counters[i], val);
2005
2006 close(stats_dir);
2007 return 0;
2008 }
2009
2010 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2011 {
2012 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2013 int alen = v4 ? 4 : 16;
2014 unsigned int flags = 0;
2015 struct ifaddrmsg ifa = {
2016 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2017 .ifa_prefixlen = addr->mask,
2018 .ifa_index = dev->ifindex,
2019 };
2020
2021 struct nl_msg *msg;
2022 if (cmd == RTM_NEWADDR)
2023 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2024
2025 msg = nlmsg_alloc_simple(cmd, flags);
2026 if (!msg)
2027 return -1;
2028
2029 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2030 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2031 if (v4) {
2032 if (addr->broadcast)
2033 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2034 if (addr->point_to_point)
2035 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2036 } else {
2037 time_t now = system_get_rtime();
2038 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2039
2040 if (addr->preferred_until) {
2041 int64_t preferred = addr->preferred_until - now;
2042 if (preferred < 0)
2043 preferred = 0;
2044 else if (preferred > UINT32_MAX)
2045 preferred = UINT32_MAX;
2046
2047 cinfo.ifa_prefered = preferred;
2048 }
2049
2050 if (addr->valid_until) {
2051 int64_t valid = addr->valid_until - now;
2052 if (valid <= 0) {
2053 nlmsg_free(msg);
2054 return -1;
2055 }
2056 else if (valid > UINT32_MAX)
2057 valid = UINT32_MAX;
2058
2059 cinfo.ifa_valid = valid;
2060 }
2061
2062 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2063
2064 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2065 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2066 }
2067
2068 return system_rtnl_call(msg);
2069 }
2070
2071 int system_add_address(struct device *dev, struct device_addr *addr)
2072 {
2073 return system_addr(dev, addr, RTM_NEWADDR);
2074 }
2075
2076 int system_del_address(struct device *dev, struct device_addr *addr)
2077 {
2078 return system_addr(dev, addr, RTM_DELADDR);
2079 }
2080
2081 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2082 {
2083 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2084 unsigned int flags = 0;
2085 struct ndmsg ndm = {
2086 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2087 .ndm_ifindex = dev->ifindex,
2088 .ndm_state = NUD_PERMANENT,
2089 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2090 };
2091 struct nl_msg *msg;
2092
2093 if (cmd == RTM_NEWNEIGH)
2094 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2095
2096 msg = nlmsg_alloc_simple(cmd, flags);
2097
2098 if (!msg)
2099 return -1;
2100
2101 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2102
2103 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2104 if (neighbor->flags & DEVNEIGH_MAC)
2105 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2106
2107
2108 return system_rtnl_call(msg);
2109 }
2110
2111 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2112 {
2113 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2114 }
2115
2116 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2117 {
2118 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2119 }
2120
2121 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2122 {
2123 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2124 bool have_gw;
2125 unsigned int flags = 0;
2126
2127 if (alen == 4)
2128 have_gw = !!route->nexthop.in.s_addr;
2129 else
2130 have_gw = route->nexthop.in6.s6_addr32[0] ||
2131 route->nexthop.in6.s6_addr32[1] ||
2132 route->nexthop.in6.s6_addr32[2] ||
2133 route->nexthop.in6.s6_addr32[3];
2134
2135 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2136 ? route->table : RT_TABLE_MAIN;
2137
2138 struct rtmsg rtm = {
2139 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2140 .rtm_dst_len = route->mask,
2141 .rtm_src_len = route->sourcemask,
2142 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2143 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2144 .rtm_scope = RT_SCOPE_NOWHERE,
2145 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2146 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2147 };
2148 struct nl_msg *msg;
2149
2150 if (cmd == RTM_NEWROUTE) {
2151 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2152
2153 if (!dev) { /* Add null-route */
2154 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2155 rtm.rtm_type = RTN_UNREACHABLE;
2156 }
2157 else
2158 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2159 }
2160
2161 if (route->flags & DEVROUTE_TYPE) {
2162 rtm.rtm_type = route->type;
2163 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2164 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2165 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2166 rtm.rtm_table = RT_TABLE_LOCAL;
2167 }
2168
2169 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2170 rtm.rtm_scope = RT_SCOPE_HOST;
2171 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2172 rtm.rtm_type == RTN_ANYCAST) {
2173 rtm.rtm_scope = RT_SCOPE_LINK;
2174 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2175 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2176 rtm.rtm_type == RTN_THROW) {
2177 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2178 dev = NULL;
2179 }
2180 }
2181
2182 msg = nlmsg_alloc_simple(cmd, flags);
2183 if (!msg)
2184 return -1;
2185
2186 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2187
2188 if (route->mask)
2189 nla_put(msg, RTA_DST, alen, &route->addr);
2190
2191 if (route->sourcemask) {
2192 if (rtm.rtm_family == AF_INET)
2193 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2194 else
2195 nla_put(msg, RTA_SRC, alen, &route->source);
2196 }
2197
2198 if (route->metric > 0)
2199 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2200
2201 if (have_gw)
2202 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2203
2204 if (dev)
2205 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2206
2207 if (table >= 256)
2208 nla_put_u32(msg, RTA_TABLE, table);
2209
2210 if (route->flags & DEVROUTE_MTU) {
2211 struct nlattr *metrics;
2212
2213 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2214 goto nla_put_failure;
2215
2216 nla_put_u32(msg, RTAX_MTU, route->mtu);
2217
2218 nla_nest_end(msg, metrics);
2219 }
2220
2221 return system_rtnl_call(msg);
2222
2223 nla_put_failure:
2224 nlmsg_free(msg);
2225 return -ENOMEM;
2226 }
2227
2228 int system_add_route(struct device *dev, struct device_route *route)
2229 {
2230 return system_rt(dev, route, RTM_NEWROUTE);
2231 }
2232
2233 int system_del_route(struct device *dev, struct device_route *route)
2234 {
2235 return system_rt(dev, route, RTM_DELROUTE);
2236 }
2237
2238 int system_flush_routes(void)
2239 {
2240 const char *names[] = {
2241 "/proc/sys/net/ipv4/route/flush",
2242 "/proc/sys/net/ipv6/route/flush"
2243 };
2244 int fd, i;
2245
2246 for (i = 0; i < ARRAY_SIZE(names); i++) {
2247 fd = open(names[i], O_WRONLY);
2248 if (fd < 0)
2249 continue;
2250
2251 if (write(fd, "-1", 2)) {}
2252 close(fd);
2253 }
2254 return 0;
2255 }
2256
2257 bool system_resolve_rt_type(const char *type, unsigned int *id)
2258 {
2259 return system_rtn_aton(type, id);
2260 }
2261
2262 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2263 {
2264 FILE *f;
2265 char *e, buf[128];
2266 unsigned int n, proto = 256;
2267 n = strtoul(type, &e, 0);
2268 if (!*e && e != type)
2269 proto = n;
2270 else if (!strcmp(type, "unspec"))
2271 proto = RTPROT_UNSPEC;
2272 else if (!strcmp(type, "kernel"))
2273 proto = RTPROT_KERNEL;
2274 else if (!strcmp(type, "boot"))
2275 proto = RTPROT_BOOT;
2276 else if (!strcmp(type, "static"))
2277 proto = RTPROT_STATIC;
2278 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2279 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2280 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2281 continue;
2282
2283 n = strtoul(e, NULL, 10);
2284 e = strtok(NULL, " \t\n");
2285
2286 if (e && !strcmp(e, type)) {
2287 proto = n;
2288 break;
2289 }
2290 }
2291 fclose(f);
2292 }
2293
2294 if (proto > 255)
2295 return false;
2296
2297 *id = proto;
2298 return true;
2299 }
2300
2301 bool system_resolve_rt_table(const char *name, unsigned int *id)
2302 {
2303 FILE *f;
2304 char *e, buf[128];
2305 unsigned int n, table = RT_TABLE_UNSPEC;
2306
2307 /* first try to parse table as number */
2308 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2309 table = n;
2310
2311 /* handle well known aliases */
2312 else if (!strcmp(name, "default"))
2313 table = RT_TABLE_DEFAULT;
2314 else if (!strcmp(name, "main"))
2315 table = RT_TABLE_MAIN;
2316 else if (!strcmp(name, "local"))
2317 table = RT_TABLE_LOCAL;
2318
2319 /* try to look up name in /etc/iproute2/rt_tables */
2320 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2321 {
2322 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2323 {
2324 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2325 continue;
2326
2327 n = strtoul(e, NULL, 10);
2328 e = strtok(NULL, " \t\n");
2329
2330 if (e && !strcmp(e, name))
2331 {
2332 table = n;
2333 break;
2334 }
2335 }
2336
2337 fclose(f);
2338 }
2339
2340 if (table == RT_TABLE_UNSPEC)
2341 return false;
2342
2343 *id = table;
2344 return true;
2345 }
2346
2347 bool system_is_default_rt_table(unsigned int id)
2348 {
2349 return (id == RT_TABLE_MAIN);
2350 }
2351
2352 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2353 {
2354 char *e;
2355 unsigned int n;
2356
2357 if (!strcmp(filter, "strict"))
2358 n = 1;
2359 else if (!strcmp(filter, "loose"))
2360 n = 2;
2361 else {
2362 n = strtoul(filter, &e, 0);
2363 if (*e || e == filter || n > 2)
2364 return false;
2365 }
2366
2367 *id = n;
2368 return true;
2369 }
2370
2371 static int system_iprule(struct iprule *rule, int cmd)
2372 {
2373 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2374
2375 struct nl_msg *msg;
2376 struct rtmsg rtm = {
2377 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2378 .rtm_protocol = RTPROT_STATIC,
2379 .rtm_scope = RT_SCOPE_UNIVERSE,
2380 .rtm_table = RT_TABLE_UNSPEC,
2381 .rtm_type = RTN_UNSPEC,
2382 .rtm_flags = 0,
2383 };
2384
2385 if (cmd == RTM_NEWRULE)
2386 rtm.rtm_type = RTN_UNICAST;
2387
2388 if (rule->invert)
2389 rtm.rtm_flags |= FIB_RULE_INVERT;
2390
2391 if (rule->flags & IPRULE_SRC)
2392 rtm.rtm_src_len = rule->src_mask;
2393
2394 if (rule->flags & IPRULE_DEST)
2395 rtm.rtm_dst_len = rule->dest_mask;
2396
2397 if (rule->flags & IPRULE_TOS)
2398 rtm.rtm_tos = rule->tos;
2399
2400 if (rule->flags & IPRULE_LOOKUP) {
2401 if (rule->lookup < 256)
2402 rtm.rtm_table = rule->lookup;
2403 }
2404
2405 if (rule->flags & IPRULE_ACTION)
2406 rtm.rtm_type = rule->action;
2407 else if (rule->flags & IPRULE_GOTO)
2408 rtm.rtm_type = FR_ACT_GOTO;
2409 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2410 rtm.rtm_type = FR_ACT_NOP;
2411
2412 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2413
2414 if (!msg)
2415 return -1;
2416
2417 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2418
2419 if (rule->flags & IPRULE_IN)
2420 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2421
2422 if (rule->flags & IPRULE_OUT)
2423 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2424
2425 if (rule->flags & IPRULE_SRC)
2426 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2427
2428 if (rule->flags & IPRULE_DEST)
2429 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2430
2431 if (rule->flags & IPRULE_PRIORITY)
2432 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2433 else if (cmd == RTM_NEWRULE)
2434 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2435
2436 if (rule->flags & IPRULE_FWMARK)
2437 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2438
2439 if (rule->flags & IPRULE_FWMASK)
2440 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2441
2442 if (rule->flags & IPRULE_LOOKUP) {
2443 if (rule->lookup >= 256)
2444 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2445 }
2446
2447 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2448 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2449
2450 if (rule->flags & IPRULE_GOTO)
2451 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2452
2453 return system_rtnl_call(msg);
2454 }
2455
2456 int system_add_iprule(struct iprule *rule)
2457 {
2458 return system_iprule(rule, RTM_NEWRULE);
2459 }
2460
2461 int system_del_iprule(struct iprule *rule)
2462 {
2463 return system_iprule(rule, RTM_DELRULE);
2464 }
2465
2466 int system_flush_iprules(void)
2467 {
2468 int rv = 0;
2469 struct iprule rule;
2470
2471 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2472 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2473
2474 memset(&rule, 0, sizeof(rule));
2475
2476
2477 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2478
2479 rule.priority = 0;
2480 rule.lookup = RT_TABLE_LOCAL;
2481 rv |= system_iprule(&rule, RTM_NEWRULE);
2482
2483 rule.priority = 32766;
2484 rule.lookup = RT_TABLE_MAIN;
2485 rv |= system_iprule(&rule, RTM_NEWRULE);
2486
2487 rule.priority = 32767;
2488 rule.lookup = RT_TABLE_DEFAULT;
2489 rv |= system_iprule(&rule, RTM_NEWRULE);
2490
2491
2492 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2493
2494 rule.priority = 0;
2495 rule.lookup = RT_TABLE_LOCAL;
2496 rv |= system_iprule(&rule, RTM_NEWRULE);
2497
2498 rule.priority = 32766;
2499 rule.lookup = RT_TABLE_MAIN;
2500 rv |= system_iprule(&rule, RTM_NEWRULE);
2501
2502 return rv;
2503 }
2504
2505 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2506 {
2507 return system_rtn_aton(action, id);
2508 }
2509
2510 time_t system_get_rtime(void)
2511 {
2512 struct timespec ts;
2513 struct timeval tv;
2514
2515 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2516 return ts.tv_sec;
2517
2518 if (gettimeofday(&tv, NULL) == 0)
2519 return tv.tv_sec;
2520
2521 return 0;
2522 }
2523
2524 #ifndef IP_DF
2525 #define IP_DF 0x4000
2526 #endif
2527
2528 static int tunnel_ioctl(const char *name, int cmd, void *p)
2529 {
2530 struct ifreq ifr;
2531
2532 memset(&ifr, 0, sizeof(ifr));
2533 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2534 ifr.ifr_ifru.ifru_data = p;
2535 return ioctl(sock_ioctl, cmd, &ifr);
2536 }
2537
2538 #ifdef IFLA_IPTUN_MAX
2539 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2540 struct blob_attr **tb)
2541 {
2542 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2543 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2544 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2545 struct blob_attr *cur;
2546 int ret = 0, ttl = 0;
2547
2548 if (!nlm)
2549 return -1;
2550
2551 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2552 nla_put_string(nlm, IFLA_IFNAME, name);
2553
2554 if (link)
2555 nla_put_u32(nlm, IFLA_LINK, link);
2556
2557 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2558 if (!linkinfo) {
2559 ret = -ENOMEM;
2560 goto failure;
2561 }
2562
2563 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2564 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2565 if (!infodata) {
2566 ret = -ENOMEM;
2567 goto failure;
2568 }
2569
2570 if (link)
2571 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2572
2573 if ((cur = tb[TUNNEL_ATTR_TTL]))
2574 ttl = blobmsg_get_u32(cur);
2575
2576 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2577 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2578
2579 struct in6_addr in6buf;
2580 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2581 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2582 ret = -EINVAL;
2583 goto failure;
2584 }
2585 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2586 }
2587
2588 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2589 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2590 ret = -EINVAL;
2591 goto failure;
2592 }
2593 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2594 }
2595
2596 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2597 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2598 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2599
2600 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2601 blobmsg_data(cur), blobmsg_len(cur));
2602
2603 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2604 char *str = blobmsg_get_string(cur);
2605
2606 if (strcmp(str, "ignore")) {
2607 char *e;
2608 unsigned encap_limit = strtoul(str, &e, 0);
2609
2610 if (e == str || *e || encap_limit > 255) {
2611 ret = -EINVAL;
2612 goto failure;
2613 }
2614
2615 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2616 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2617 }
2618 }
2619
2620 #ifdef IFLA_IPTUN_FMR_MAX
2621 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2622 struct blob_attr *rcur;
2623 unsigned rrem, fmrcnt = 0;
2624 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2625
2626 if (!fmrs) {
2627 ret = -ENOMEM;
2628 goto failure;
2629 }
2630
2631 blobmsg_for_each_attr(rcur, cur, rrem) {
2632 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2633 struct in6_addr ip6prefix;
2634 struct in_addr ip4prefix;
2635 unsigned ip4len, ip6len, ealen, offset;
2636
2637 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2638 blobmsg_data(rcur), blobmsg_len(rcur));
2639
2640 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2641 !parse_ip_and_netmask(AF_INET6,
2642 blobmsg_data(tb_cur), &ip6prefix,
2643 &ip6len)) {
2644 ret = -EINVAL;
2645 goto failure;
2646 }
2647
2648 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2649 !parse_ip_and_netmask(AF_INET,
2650 blobmsg_data(tb_cur), &ip4prefix,
2651 &ip4len)) {
2652 ret = -EINVAL;
2653 goto failure;
2654 }
2655
2656 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2657 ret = -EINVAL;
2658 goto failure;
2659 }
2660 ealen = blobmsg_get_u32(tb_cur);
2661
2662 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2663 ret = -EINVAL;
2664 goto failure;
2665 }
2666 offset = blobmsg_get_u32(tb_cur);
2667
2668 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2669 if (!rule) {
2670 ret = -ENOMEM;
2671 goto failure;
2672 }
2673
2674 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2675 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2676 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2677 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2678 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2679 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2680
2681 nla_nest_end(nlm, rule);
2682 }
2683
2684 nla_nest_end(nlm, fmrs);
2685 }
2686 #endif
2687 if (tun_flags)
2688 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2689 }
2690
2691 nla_nest_end(nlm, infodata);
2692 nla_nest_end(nlm, linkinfo);
2693
2694 return system_rtnl_call(nlm);
2695
2696 failure:
2697 nlmsg_free(nlm);
2698 return ret;
2699 }
2700 #endif
2701
2702 #ifdef IFLA_IPTUN_MAX
2703 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2704 static int system_add_gre_tunnel(const char *name, const char *kind,
2705 const unsigned int link, struct blob_attr **tb, bool v6)
2706 {
2707 struct nl_msg *nlm;
2708 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2709 struct blob_attr *cur;
2710 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2711 uint16_t iflags = 0, oflags = 0;
2712 uint8_t tos = 0;
2713 int ret = 0, ttl = 0;
2714 unsigned encap_limit = 0;
2715
2716 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2717 if (!nlm)
2718 return -1;
2719
2720 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2721 nla_put_string(nlm, IFLA_IFNAME, name);
2722
2723 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2724 if (!linkinfo) {
2725 ret = -ENOMEM;
2726 goto failure;
2727 }
2728
2729 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2730 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2731 if (!infodata) {
2732 ret = -ENOMEM;
2733 goto failure;
2734 }
2735
2736 if (link)
2737 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2738
2739 if ((cur = tb[TUNNEL_ATTR_TTL]))
2740 ttl = blobmsg_get_u32(cur);
2741
2742 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2743 char *str = blobmsg_get_string(cur);
2744 if (strcmp(str, "inherit")) {
2745 unsigned uval;
2746
2747 if (!system_tos_aton(str, &uval)) {
2748 ret = -EINVAL;
2749 goto failure;
2750 }
2751
2752 if (v6)
2753 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2754 else
2755 tos = uval;
2756 } else {
2757 if (v6)
2758 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2759 else
2760 tos = 1;
2761 }
2762 }
2763
2764 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2765 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2766
2767 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2768 blobmsg_data(cur), blobmsg_len(cur));
2769
2770 if ((cur = tb_data[GRE_DATA_IKEY])) {
2771 if ((ikey = blobmsg_get_u32(cur)))
2772 iflags |= GRE_KEY;
2773 }
2774
2775 if ((cur = tb_data[GRE_DATA_OKEY])) {
2776 if ((okey = blobmsg_get_u32(cur)))
2777 oflags |= GRE_KEY;
2778 }
2779
2780 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2781 if (blobmsg_get_bool(cur))
2782 iflags |= GRE_CSUM;
2783 }
2784
2785 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2786 if (blobmsg_get_bool(cur))
2787 oflags |= GRE_CSUM;
2788 }
2789
2790 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2791 if (blobmsg_get_bool(cur))
2792 iflags |= GRE_SEQ;
2793 }
2794
2795 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2796 if (blobmsg_get_bool(cur))
2797 oflags |= GRE_SEQ;
2798 }
2799
2800 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2801 char *str = blobmsg_get_string(cur);
2802
2803 if (strcmp(str, "ignore")) {
2804 char *e;
2805
2806 encap_limit = strtoul(str, &e, 0);
2807
2808 if (e == str || *e || encap_limit > 255) {
2809 ret = -EINVAL;
2810 goto failure;
2811 }
2812
2813 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2814 }
2815 }
2816 }
2817
2818 if (v6) {
2819 struct in6_addr in6buf;
2820 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2821 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2822 ret = -EINVAL;
2823 goto failure;
2824 }
2825 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2826 }
2827
2828 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2829 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2830 ret = -EINVAL;
2831 goto failure;
2832 }
2833 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2834 }
2835
2836 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2837 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2838
2839 if (flowinfo)
2840 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2841
2842 if (flags6)
2843 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2844
2845 if (!ttl)
2846 ttl = 64;
2847 } else {
2848 struct in_addr inbuf;
2849 bool set_df = true;
2850
2851 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2852 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2853 ret = -EINVAL;
2854 goto failure;
2855 }
2856 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2857 }
2858
2859 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2860 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2861 ret = -EINVAL;
2862 goto failure;
2863 }
2864 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2865
2866 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2867 if (!okey) {
2868 okey = inbuf.s_addr;
2869 oflags |= GRE_KEY;
2870 }
2871
2872 if (!ikey) {
2873 ikey = inbuf.s_addr;
2874 iflags |= GRE_KEY;
2875 }
2876 }
2877 }
2878
2879 if ((cur = tb[TUNNEL_ATTR_DF]))
2880 set_df = blobmsg_get_bool(cur);
2881
2882 if (!set_df) {
2883 /* ttl != 0 and nopmtudisc are incompatible */
2884 if (ttl) {
2885 ret = -EINVAL;
2886 goto failure;
2887 }
2888 } else if (!ttl)
2889 ttl = 64;
2890
2891 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2892
2893 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2894 }
2895
2896 if (ttl)
2897 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2898
2899 if (oflags)
2900 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2901
2902 if (iflags)
2903 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2904
2905 if (okey)
2906 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2907
2908 if (ikey)
2909 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2910
2911 nla_nest_end(nlm, infodata);
2912 nla_nest_end(nlm, linkinfo);
2913
2914 return system_rtnl_call(nlm);
2915
2916 failure:
2917 nlmsg_free(nlm);
2918 return ret;
2919 }
2920 #endif
2921
2922 #ifdef IFLA_VTI_MAX
2923 static int system_add_vti_tunnel(const char *name, const char *kind,
2924 const unsigned int link, struct blob_attr **tb, bool v6)
2925 {
2926 struct nl_msg *nlm;
2927 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2928 struct blob_attr *cur;
2929 int ret = 0;
2930
2931 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2932 if (!nlm)
2933 return -1;
2934
2935 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2936 nla_put_string(nlm, IFLA_IFNAME, name);
2937
2938 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2939 if (!linkinfo) {
2940 ret = -ENOMEM;
2941 goto failure;
2942 }
2943
2944 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2945 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2946 if (!infodata) {
2947 ret = -ENOMEM;
2948 goto failure;
2949 }
2950
2951 if (link)
2952 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2953
2954 if (v6) {
2955 struct in6_addr in6buf;
2956 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2957 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2958 ret = -EINVAL;
2959 goto failure;
2960 }
2961 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2962 }
2963
2964 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2965 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2966 ret = -EINVAL;
2967 goto failure;
2968 }
2969 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2970 }
2971
2972 } else {
2973 struct in_addr inbuf;
2974
2975 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2976 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2977 ret = -EINVAL;
2978 goto failure;
2979 }
2980 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2981 }
2982
2983 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2984 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2985 ret = -EINVAL;
2986 goto failure;
2987 }
2988 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2989 }
2990
2991 }
2992
2993 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2994 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2995 uint32_t ikey = 0, okey = 0;
2996
2997 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2998 blobmsg_data(cur), blobmsg_len(cur));
2999
3000 if ((cur = tb_data[VTI_DATA_IKEY])) {
3001 if ((ikey = blobmsg_get_u32(cur)))
3002 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3003 }
3004
3005 if ((cur = tb_data[VTI_DATA_OKEY])) {
3006 if ((okey = blobmsg_get_u32(cur)))
3007 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3008 }
3009 }
3010
3011 nla_nest_end(nlm, infodata);
3012 nla_nest_end(nlm, linkinfo);
3013
3014 return system_rtnl_call(nlm);
3015
3016 failure:
3017 nlmsg_free(nlm);
3018 return ret;
3019 }
3020 #endif
3021
3022 #ifdef IFLA_XFRM_MAX
3023 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3024 const unsigned int link, struct blob_attr **tb)
3025 {
3026 struct nl_msg *nlm;
3027 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3028 struct blob_attr *cur;
3029 int ret = 0;
3030
3031 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3032 if (!nlm)
3033 return -1;
3034
3035 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3036 nla_put_string(nlm, IFLA_IFNAME, name);
3037
3038 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3039 if (!linkinfo) {
3040 ret = -ENOMEM;
3041 goto failure;
3042 }
3043
3044 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3045 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3046 if (!infodata) {
3047 ret = -ENOMEM;
3048 goto failure;
3049 }
3050
3051 if (link)
3052 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3053
3054 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3055 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3056 uint32_t if_id = 0;
3057
3058 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3059 blobmsg_data(cur), blobmsg_len(cur));
3060
3061 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3062 if ((if_id = blobmsg_get_u32(cur)))
3063 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3064 }
3065
3066 }
3067
3068 nla_nest_end(nlm, infodata);
3069 nla_nest_end(nlm, linkinfo);
3070
3071 return system_rtnl_call(nlm);
3072
3073 failure:
3074 nlmsg_free(nlm);
3075 return ret;
3076 }
3077 #endif
3078
3079 #ifdef IFLA_VXLAN_MAX
3080 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3081 struct blob_attr *cur;
3082 if ((cur = tb_data[vxlandatatype])) {
3083 bool val = blobmsg_get_bool(cur);
3084 if (invert)
3085 val = !val;
3086
3087 if ((attrtype == IFLA_VXLAN_GBP) && val)
3088 nla_put_flag(msg, attrtype);
3089 else
3090 nla_put_u8(msg, attrtype, val);
3091
3092 }
3093 }
3094
3095 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3096 {
3097 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3098 struct nl_msg *msg;
3099 struct nlattr *linkinfo, *data;
3100 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3101 struct blob_attr *cur;
3102 int ret = 0;
3103
3104 if ((cur = tb[TUNNEL_ATTR_DATA]))
3105 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3106 blobmsg_data(cur), blobmsg_len(cur));
3107 else
3108 return -EINVAL;
3109
3110 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3111
3112 if (!msg)
3113 return -1;
3114
3115 nlmsg_append(msg, &iim, sizeof(iim), 0);
3116
3117 nla_put_string(msg, IFLA_IFNAME, name);
3118
3119 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3120 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3121 if (!ea) {
3122 ret = -EINVAL;
3123 goto failure;
3124 }
3125
3126 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3127 }
3128
3129 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3130 uint32_t mtu = blobmsg_get_u32(cur);
3131 nla_put_u32(msg, IFLA_MTU, mtu);
3132 }
3133
3134 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3135 ret = -ENOMEM;
3136 goto failure;
3137 }
3138
3139 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3140
3141 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3142 ret = -ENOMEM;
3143 goto failure;
3144 }
3145
3146 if (link)
3147 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3148
3149 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3150 uint32_t id = blobmsg_get_u32(cur);
3151 if (id >= (1u << 24) - 1) {
3152 ret = -EINVAL;
3153 goto failure;
3154 }
3155
3156 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3157 }
3158
3159 if (v6) {
3160 struct in6_addr in6buf;
3161 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3162 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3163 ret = -EINVAL;
3164 goto failure;
3165 }
3166 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3167 }
3168
3169 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3170 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3171 ret = -EINVAL;
3172 goto failure;
3173 }
3174 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3175 }
3176 } else {
3177 struct in_addr inbuf;
3178
3179 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3180 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3181 ret = -EINVAL;
3182 goto failure;
3183 }
3184 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3185 }
3186
3187 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3188 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3189 ret = -EINVAL;
3190 goto failure;
3191 }
3192 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3193 }
3194 }
3195
3196 uint32_t port = 4789;
3197 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3198 port = blobmsg_get_u32(cur);
3199 if (port < 1 || port > 65535) {
3200 ret = -EINVAL;
3201 goto failure;
3202 }
3203 }
3204 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3205
3206 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3207 struct ifla_vxlan_port_range srcports = {0,0};
3208
3209 uint32_t low = blobmsg_get_u32(cur);
3210 if (low < 1 || low > 65535 - 1) {
3211 ret = -EINVAL;
3212 goto failure;
3213 }
3214
3215 srcports.low = htons((uint16_t) low);
3216 srcports.high = htons((uint16_t) (low+1));
3217
3218 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3219 uint32_t high = blobmsg_get_u32(cur);
3220 if (high < 1 || high > 65535) {
3221 ret = -EINVAL;
3222 goto failure;
3223 }
3224
3225 if (high > low)
3226 srcports.high = htons((uint16_t) high);
3227 }
3228
3229 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3230 }
3231
3232 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3233 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3234 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3235 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3236 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3237 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3238 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3239 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3240 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3241
3242 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3243 uint32_t ageing = blobmsg_get_u32(cur);
3244 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3245 }
3246
3247 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3248 uint32_t maxaddress = blobmsg_get_u32(cur);
3249 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3250 }
3251
3252 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3253 char *str = blobmsg_get_string(cur);
3254 unsigned tos = 1;
3255
3256 if (strcmp(str, "inherit")) {
3257 if (!system_tos_aton(str, &tos)) {
3258 ret = -EINVAL;
3259 goto failure;
3260 }
3261 }
3262
3263 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3264 }
3265
3266 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3267 uint32_t ttl = blobmsg_get_u32(cur);
3268 if (ttl < 1 || ttl > 255) {
3269 ret = -EINVAL;
3270 goto failure;
3271 }
3272
3273 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3274 }
3275
3276 nla_nest_end(msg, data);
3277 nla_nest_end(msg, linkinfo);
3278
3279 ret = system_rtnl_call(msg);
3280 if (ret)
3281 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3282
3283 return ret;
3284
3285 failure:
3286 nlmsg_free(msg);
3287 return ret;
3288 }
3289 #endif
3290
3291 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3292 {
3293 struct blob_attr *cur;
3294 int ret = 0;
3295
3296 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3297 return -1;
3298
3299 #ifdef SIOCADD6RD
3300 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3301 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3302 unsigned int mask;
3303 struct ip_tunnel_6rd p6;
3304
3305 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3306 blobmsg_data(cur), blobmsg_len(cur));
3307
3308 memset(&p6, 0, sizeof(p6));
3309
3310 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3311 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3312 &p6.prefix, &mask) || mask > 128) {
3313 ret = -EINVAL;
3314 goto failure;
3315 }
3316
3317 p6.prefixlen = mask;
3318 }
3319
3320 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3321 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3322 &p6.relay_prefix, &mask) || mask > 32) {
3323 ret = -EINVAL;
3324 goto failure;
3325 }
3326
3327 p6.relay_prefixlen = mask;
3328 }
3329
3330 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3331 ret = -1;
3332 goto failure;
3333 }
3334 }
3335 #endif
3336
3337 return ret;
3338
3339 failure:
3340 __system_del_ip_tunnel(name, tb);
3341 return ret;
3342 }
3343
3344 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3345 {
3346 struct blob_attr *cur;
3347 bool set_df = true;
3348 struct ip_tunnel_parm p = {
3349 .link = link,
3350 .iph = {
3351 .version = 4,
3352 .ihl = 5,
3353 .protocol = proto,
3354 }
3355 };
3356
3357 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3358 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3359 return -EINVAL;
3360
3361 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3362 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3363 return -EINVAL;
3364
3365 if ((cur = tb[TUNNEL_ATTR_DF]))
3366 set_df = blobmsg_get_bool(cur);
3367
3368 if ((cur = tb[TUNNEL_ATTR_TTL]))
3369 p.iph.ttl = blobmsg_get_u32(cur);
3370
3371 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3372 char *str = blobmsg_get_string(cur);
3373 if (strcmp(str, "inherit")) {
3374 unsigned uval;
3375
3376 if (!system_tos_aton(str, &uval))
3377 return -EINVAL;
3378
3379 p.iph.tos = uval;
3380 } else
3381 p.iph.tos = 1;
3382 }
3383
3384 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3385 /* ttl !=0 and nopmtudisc are incompatible */
3386 if (p.iph.ttl && p.iph.frag_off == 0)
3387 return -EINVAL;
3388
3389 strncpy(p.name, name, sizeof(p.name) - 1);
3390
3391 switch (p.iph.protocol) {
3392 case IPPROTO_IPIP:
3393 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3394 case IPPROTO_IPV6:
3395 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3396 default:
3397 break;
3398 }
3399 return -1;
3400 }
3401
3402 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3403 {
3404 struct blob_attr *cur;
3405 const char *str;
3406
3407 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3408 return -EINVAL;
3409 str = blobmsg_data(cur);
3410
3411 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3412 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3413 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3414 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3415 !strcmp(str, "xfrm"))
3416 return system_link_del(name);
3417 else
3418 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3419 }
3420
3421 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3422 {
3423 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3424
3425 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3426 blob_data(attr), blob_len(attr));
3427
3428 return __system_del_ip_tunnel(name, tb);
3429 }
3430
3431 int system_update_ipv6_mtu(struct device *dev, int mtu)
3432 {
3433 int ret = -1;
3434 char buf[64];
3435 int fd;
3436
3437 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3438 dev->ifname);
3439
3440 fd = open(buf, O_RDWR);
3441 if (fd < 0)
3442 return ret;
3443
3444 if (!mtu) {
3445 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3446 if (len < 0)
3447 goto out;
3448
3449 buf[len] = 0;
3450 ret = atoi(buf);
3451 } else {
3452 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3453 ret = mtu;
3454 }
3455
3456 out:
3457 close(fd);
3458 return ret;
3459 }
3460
3461 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3462 {
3463 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3464 struct blob_attr *cur;
3465 const char *str;
3466
3467 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3468 blob_data(attr), blob_len(attr));
3469
3470 __system_del_ip_tunnel(name, tb);
3471
3472 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3473 return -EINVAL;
3474 str = blobmsg_data(cur);
3475
3476 unsigned int ttl = 0;
3477 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3478 ttl = blobmsg_get_u32(cur);
3479 if (ttl > 255)
3480 return -EINVAL;
3481 }
3482
3483 unsigned int link = 0;
3484 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3485 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3486 if (!iface)
3487 return -EINVAL;
3488
3489 if (iface->l3_dev.dev)
3490 link = iface->l3_dev.dev->ifindex;
3491 }
3492
3493 if (!strcmp(str, "sit"))
3494 return system_add_sit_tunnel(name, link, tb);
3495 #ifdef IFLA_IPTUN_MAX
3496 else if (!strcmp(str, "ipip6")) {
3497 return system_add_ip6_tunnel(name, link, tb);
3498 } else if (!strcmp(str, "greip")) {
3499 return system_add_gre_tunnel(name, "gre", link, tb, false);
3500 } else if (!strcmp(str, "gretapip")) {
3501 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3502 } else if (!strcmp(str, "greip6")) {
3503 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3504 } else if (!strcmp(str, "gretapip6")) {
3505 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3506 #ifdef IFLA_VTI_MAX
3507 } else if (!strcmp(str, "vtiip")) {
3508 return system_add_vti_tunnel(name, "vti", link, tb, false);
3509 } else if (!strcmp(str, "vtiip6")) {
3510 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3511 #endif
3512 #ifdef IFLA_XFRM_MAX
3513 } else if (!strcmp(str, "xfrm")) {
3514 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3515 #endif
3516 #ifdef IFLA_VXLAN_MAX
3517 } else if(!strcmp(str, "vxlan")) {
3518 return system_add_vxlan(name, link, tb, false);
3519 } else if(!strcmp(str, "vxlan6")) {
3520 return system_add_vxlan(name, link, tb, true);
3521 #endif
3522 #endif
3523 } else if (!strcmp(str, "ipip")) {
3524 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3525 }
3526 else
3527 return -EINVAL;
3528
3529 return 0;
3530 }
OpenWrt Network interface configuration daemon