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