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