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add basic support for jail network namespaces
[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 #include <sched.h>
49
50 #ifndef RTN_FAILED_POLICY
51 #define RTN_FAILED_POLICY 12
52 #endif
53
54 #ifndef IFA_F_NOPREFIXROUTE
55 #define IFA_F_NOPREFIXROUTE 0x200
56 #endif
57
58 #ifndef IFA_FLAGS
59 #define IFA_FLAGS (IFA_MULTICAST + 1)
60 #endif
61
62 #include <string.h>
63 #include <fcntl.h>
64 #include <glob.h>
65 #include <time.h>
66 #include <unistd.h>
67
68 #include <netlink/msg.h>
69 #include <netlink/attr.h>
70 #include <netlink/socket.h>
71 #include <libubox/uloop.h>
72
73 #include "netifd.h"
74 #include "device.h"
75 #include "system.h"
76
77 struct event_socket {
78 struct uloop_fd uloop;
79 struct nl_sock *sock;
80 int bufsize;
81 };
82
83 static int sock_ioctl = -1;
84 static struct nl_sock *sock_rtnl = NULL;
85
86 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
87 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
88 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
89 const unsigned int link, struct blob_attr **tb);
90 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
91
92 static char dev_buf[256];
93
94 static void
95 handler_nl_event(struct uloop_fd *u, unsigned int events)
96 {
97 struct event_socket *ev = container_of(u, struct event_socket, uloop);
98 int err;
99 socklen_t errlen = sizeof(err);
100
101 if (!u->error) {
102 nl_recvmsgs_default(ev->sock);
103 return;
104 }
105
106 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
107 goto abort;
108
109 switch(err) {
110 case ENOBUFS:
111 /* Increase rx buffer size on netlink socket */
112 ev->bufsize *= 2;
113 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
114 goto abort;
115
116 /* Request full dump since some info got dropped */
117 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
118 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
119 break;
120
121 default:
122 goto abort;
123 }
124 u->error = false;
125 return;
126
127 abort:
128 uloop_fd_delete(&ev->uloop);
129 return;
130 }
131
132 static struct nl_sock *
133 create_socket(int protocol, int groups)
134 {
135 struct nl_sock *sock;
136
137 sock = nl_socket_alloc();
138 if (!sock)
139 return NULL;
140
141 if (groups)
142 nl_join_groups(sock, groups);
143
144 if (nl_connect(sock, protocol)) {
145 nl_socket_free(sock);
146 return NULL;
147 }
148
149 return sock;
150 }
151
152 static bool
153 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
154 uloop_fd_handler cb, int flags)
155 {
156 ev->sock = create_socket(protocol, groups);
157 if (!ev->sock)
158 return false;
159
160 ev->uloop.fd = nl_socket_get_fd(ev->sock);
161 ev->uloop.cb = cb;
162 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
163 return false;
164
165 return true;
166 }
167
168 static bool
169 create_event_socket(struct event_socket *ev, int protocol,
170 int (*cb)(struct nl_msg *msg, void *arg))
171 {
172 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
173 return false;
174
175 /* Install the valid custom callback handler */
176 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
177
178 /* Disable sequence number checking on event sockets */
179 nl_socket_disable_seq_check(ev->sock);
180
181 /* Increase rx buffer size to 65K on event sockets */
182 ev->bufsize = 65535;
183 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
184 return false;
185
186 return true;
187 }
188
189 static bool
190 create_hotplug_event_socket(struct event_socket *ev, int protocol,
191 void (*cb)(struct uloop_fd *u, unsigned int events))
192 {
193 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
194 return false;
195
196 /* Increase rx buffer size to 65K on event sockets */
197 ev->bufsize = 65535;
198 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
199 return false;
200
201 return true;
202 }
203
204 static bool
205 system_rtn_aton(const char *src, unsigned int *dst)
206 {
207 char *e;
208 unsigned int n;
209
210 if (!strcmp(src, "local"))
211 n = RTN_LOCAL;
212 else if (!strcmp(src, "nat"))
213 n = RTN_NAT;
214 else if (!strcmp(src, "broadcast"))
215 n = RTN_BROADCAST;
216 else if (!strcmp(src, "anycast"))
217 n = RTN_ANYCAST;
218 else if (!strcmp(src, "multicast"))
219 n = RTN_MULTICAST;
220 else if (!strcmp(src, "prohibit"))
221 n = RTN_PROHIBIT;
222 else if (!strcmp(src, "unreachable"))
223 n = RTN_UNREACHABLE;
224 else if (!strcmp(src, "blackhole"))
225 n = RTN_BLACKHOLE;
226 else if (!strcmp(src, "xresolve"))
227 n = RTN_XRESOLVE;
228 else if (!strcmp(src, "unicast"))
229 n = RTN_UNICAST;
230 else if (!strcmp(src, "throw"))
231 n = RTN_THROW;
232 else if (!strcmp(src, "failed_policy"))
233 n = RTN_FAILED_POLICY;
234 else {
235 n = strtoul(src, &e, 0);
236 if (!e || *e || e == src || n > 255)
237 return false;
238 }
239
240 *dst = n;
241 return true;
242 }
243
244 static bool
245 system_tos_aton(const char *src, unsigned *dst)
246 {
247 char *e;
248
249 *dst = strtoul(src, &e, 16);
250 if (e == src || *e || *dst > 255)
251 return false;
252
253 return true;
254 }
255
256 int system_init(void)
257 {
258 static struct event_socket rtnl_event;
259 static struct event_socket hotplug_event;
260
261 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
262 system_fd_set_cloexec(sock_ioctl);
263
264 /* Prepare socket for routing / address control */
265 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
266 if (!sock_rtnl)
267 return -1;
268
269 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
270 return -1;
271
272 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
273 handle_hotplug_event))
274 return -1;
275
276 /* Receive network link events form kernel */
277 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
278
279 return 0;
280 }
281
282 static void system_set_sysctl(const char *path, const char *val)
283 {
284 int fd;
285
286 fd = open(path, O_WRONLY);
287 if (fd < 0)
288 return;
289
290 if (write(fd, val, strlen(val))) {}
291 close(fd);
292 }
293
294 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
295 {
296 snprintf(dev_buf, sizeof(dev_buf), path, device);
297 system_set_sysctl(dev_buf, val);
298 }
299
300 static void system_set_disable_ipv6(struct device *dev, const char *val)
301 {
302 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
303 }
304
305 static void system_set_rpfilter(struct device *dev, const char *val)
306 {
307 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
308 }
309
310 static void system_set_acceptlocal(struct device *dev, const char *val)
311 {
312 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
313 }
314
315 static void system_set_igmpversion(struct device *dev, const char *val)
316 {
317 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
318 }
319
320 static void system_set_mldversion(struct device *dev, const char *val)
321 {
322 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
323 }
324
325 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
326 {
327 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
328 }
329
330 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
331 {
332 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
333 }
334
335 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
336 {
337 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
338 }
339
340 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
341 {
342 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
343 }
344
345 static void system_set_neigh4locktime(struct device *dev, const char *val)
346 {
347 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
348 }
349
350 static void system_set_dadtransmits(struct device *dev, const char *val)
351 {
352 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
353 }
354
355 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
356 {
357 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
358 }
359
360 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
361 {
362 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
363 }
364
365 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
366 {
367 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
368 }
369
370 static void system_bridge_set_isolated(struct device *dev, const char *val)
371 {
372 system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val);
373 }
374
375 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
376 {
377 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
378 "/sys/class/net/%s/brport/multicast_router",
379 dev->ifname, val);
380 }
381
382 static void system_bridge_set_robustness(struct device *dev, const char *val)
383 {
384 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
385 dev->ifname, val);
386 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
387 dev->ifname, val);
388 }
389
390 static void system_bridge_set_query_interval(struct device *dev, const char *val)
391 {
392 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
393 dev->ifname, val);
394 }
395
396 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
397 {
398 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
399 dev->ifname, val);
400 }
401
402 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
403 {
404 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
405 dev->ifname, val);
406 }
407
408 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
409 {
410 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
411 dev->ifname, val);
412 }
413
414 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
415 {
416 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
417 dev->ifname, val);
418 }
419
420 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
421 {
422 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
423 dev->ifname, val);
424 }
425
426 static void system_bridge_set_stp_state(struct device *dev, const char *val)
427 {
428 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/stp_state", dev->ifname, val);
429 }
430
431 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
432 {
433 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/forward_delay", dev->ifname, val);
434 }
435
436 static void system_bridge_set_priority(struct device *dev, const char *val)
437 {
438 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/priority", dev->ifname, val);
439 }
440
441 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
442 {
443 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/ageing_time", dev->ifname, val);
444 }
445
446 static void system_bridge_set_hello_time(struct device *dev, const char *val)
447 {
448 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hello_time", dev->ifname, val);
449 }
450
451 static void system_bridge_set_max_age(struct device *dev, const char *val)
452 {
453 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/max_age", dev->ifname, val);
454 }
455
456 static void system_bridge_set_learning(struct device *dev, const char *val)
457 {
458 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
459 }
460
461 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
462 {
463 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
464 }
465
466 static void system_set_sendredirects(struct device *dev, const char *val)
467 {
468 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
469 }
470
471 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
472 {
473 int fd = -1, ret = -1;
474
475 fd = open(path, O_RDONLY);
476 if (fd < 0)
477 goto out;
478
479 ssize_t len = read(fd, buf, buf_sz - 1);
480 if (len < 0)
481 goto out;
482
483 ret = buf[len] = 0;
484
485 out:
486 if (fd >= 0)
487 close(fd);
488
489 return ret;
490 }
491
492 static int
493 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
494 {
495 snprintf(dev_buf, sizeof(dev_buf), path, device);
496 return system_get_sysctl(dev_buf, buf, buf_sz);
497 }
498
499 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
500 {
501 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
502 dev->ifname, buf, buf_sz);
503 }
504
505 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
506 {
507 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
508 dev->ifname, buf, buf_sz);
509 }
510
511 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
512 {
513 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
514 dev->ifname, buf, buf_sz);
515 }
516
517 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
518 {
519 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
520 dev->ifname, buf, buf_sz);
521 }
522
523 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
524 {
525 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
526 dev->ifname, buf, buf_sz);
527 }
528
529 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
530 {
531 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
532 dev->ifname, buf, buf_sz);
533 }
534
535 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
536 {
537 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
538 dev->ifname, buf, buf_sz);
539 }
540
541 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
542 {
543 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
544 dev->ifname, buf, buf_sz);
545 }
546
547 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
548 {
549 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
550 dev->ifname, buf, buf_sz);
551 }
552
553 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
554 {
555 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
556 dev->ifname, buf, buf_sz);
557 }
558
559 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
560 {
561 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
562 dev->ifname, buf, buf_sz);
563 }
564
565 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
566 {
567 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
568 dev->ifname, buf, buf_sz);
569 }
570
571 /* Evaluate netlink messages */
572 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
573 {
574 struct nlmsghdr *nh = nlmsg_hdr(msg);
575 struct nlattr *nla[__IFLA_MAX];
576 int link_state = 0;
577 char buf[10];
578
579 if (nh->nlmsg_type != RTM_NEWLINK)
580 goto out;
581
582 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
583 if (!nla[IFLA_IFNAME])
584 goto out;
585
586 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
587 if (!dev)
588 goto out;
589
590 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
591 link_state = strtoul(buf, NULL, 0);
592
593 device_set_link(dev, link_state ? true : false);
594
595 out:
596 return 0;
597 }
598
599 static void
600 handle_hotplug_msg(char *data, int size)
601 {
602 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
603 char *cur, *end, *sep;
604 struct device *dev;
605 int skip;
606 bool add, move = false;
607
608 if (!strncmp(data, "add@", 4))
609 add = true;
610 else if (!strncmp(data, "remove@", 7))
611 add = false;
612 else if (!strncmp(data, "move@", 5)) {
613 add = true;
614 move = true;
615 }
616 else
617 return;
618
619 skip = strlen(data) + 1;
620 end = data + size;
621
622 for (cur = data + skip; cur < end; cur += skip) {
623 skip = strlen(cur) + 1;
624
625 sep = strchr(cur, '=');
626 if (!sep)
627 continue;
628
629 *sep = 0;
630 if (!strcmp(cur, "INTERFACE"))
631 interface = sep + 1;
632 else if (!strcmp(cur, "SUBSYSTEM")) {
633 subsystem = sep + 1;
634 if (strcmp(subsystem, "net") != 0)
635 return;
636 } else if (!strcmp(cur, "DEVPATH_OLD")) {
637 interface_old = strrchr(sep + 1, '/');
638 if (interface_old)
639 interface_old++;
640 }
641 }
642
643 if (subsystem && interface) {
644 if (move && interface_old)
645 goto move;
646 else
647 goto found;
648 }
649
650 return;
651
652 move:
653 dev = device_find(interface_old);
654 if (!dev)
655 goto found;
656
657 if (dev->type != &simple_device_type)
658 goto found;
659
660 device_set_present(dev, false);
661
662 found:
663 dev = device_find(interface);
664 if (!dev)
665 return;
666
667 if (dev->type != &simple_device_type)
668 return;
669
670 if (add && system_if_force_external(dev->ifname))
671 return;
672
673 device_set_present(dev, add);
674 }
675
676 static void
677 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
678 {
679 struct event_socket *ev = container_of(u, struct event_socket, uloop);
680 struct sockaddr_nl nla;
681 unsigned char *buf = NULL;
682 int size;
683 int err;
684 socklen_t errlen = sizeof(err);
685
686 if (!u->error) {
687 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
688 if (nla.nl_pid == 0)
689 handle_hotplug_msg((char *) buf, size);
690
691 free(buf);
692 }
693 return;
694 }
695
696 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
697 goto abort;
698
699 switch(err) {
700 case ENOBUFS:
701 /* Increase rx buffer size on netlink socket */
702 ev->bufsize *= 2;
703 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
704 goto abort;
705 break;
706
707 default:
708 goto abort;
709 }
710 u->error = false;
711 return;
712
713 abort:
714 uloop_fd_delete(&ev->uloop);
715 return;
716 }
717
718 static int system_rtnl_call(struct nl_msg *msg)
719 {
720 int ret;
721
722 ret = nl_send_auto_complete(sock_rtnl, msg);
723 nlmsg_free(msg);
724
725 if (ret < 0)
726 return ret;
727
728 return nl_wait_for_ack(sock_rtnl);
729 }
730
731 int system_bridge_delbr(struct device *bridge)
732 {
733 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
734 }
735
736 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
737 {
738 struct ifreq ifr;
739
740 memset(&ifr, 0, sizeof(ifr));
741 if (dev)
742 ifr.ifr_ifindex = dev->ifindex;
743 else
744 ifr.ifr_data = data;
745 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
746 return ioctl(sock_ioctl, cmd, &ifr);
747 }
748
749 static bool system_is_bridge(const char *name, char *buf, int buflen)
750 {
751 struct stat st;
752
753 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
754 if (stat(buf, &st) < 0)
755 return false;
756
757 return true;
758 }
759
760 static char *system_get_bridge(const char *name, char *buf, int buflen)
761 {
762 char *path;
763 ssize_t len = -1;
764 glob_t gl;
765
766 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
767 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
768 return NULL;
769
770 if (gl.gl_pathc > 0)
771 len = readlink(gl.gl_pathv[0], buf, buflen);
772
773 globfree(&gl);
774
775 if (len < 0)
776 return NULL;
777
778 buf[len] = 0;
779 path = strrchr(buf, '/');
780 if (!path)
781 return NULL;
782
783 return path + 1;
784 }
785
786 static void
787 system_bridge_set_wireless(struct device *bridge, struct device *dev)
788 {
789 bool mcast_to_ucast = dev->wireless_ap;
790 bool hairpin = true;
791
792 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
793 !bridge->settings.multicast_to_unicast)
794 mcast_to_ucast = false;
795
796 if (!mcast_to_ucast || dev->wireless_isolate)
797 hairpin = false;
798
799 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
800 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
801 }
802
803 int system_bridge_addif(struct device *bridge, struct device *dev)
804 {
805 char buf[64];
806 char *oldbr;
807 int ret = 0;
808
809 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
810 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
811 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
812
813 if (dev->wireless)
814 system_bridge_set_wireless(bridge, dev);
815
816 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
817 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
818 system_bridge_set_multicast_router(dev, buf, false);
819 }
820
821 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
822 dev->settings.multicast_fast_leave)
823 system_bridge_set_multicast_fast_leave(dev, "1");
824
825 if (dev->settings.flags & DEV_OPT_LEARNING &&
826 !dev->settings.learning)
827 system_bridge_set_learning(dev, "0");
828
829 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
830 !dev->settings.unicast_flood)
831 system_bridge_set_unicast_flood(dev, "0");
832
833 if (dev->settings.flags & DEV_OPT_ISOLATE &&
834 dev->settings.isolate)
835 system_bridge_set_isolated(dev, "1");
836
837 return ret;
838 }
839
840 int system_bridge_delif(struct device *bridge, struct device *dev)
841 {
842 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
843 }
844
845 int system_if_resolve(struct device *dev)
846 {
847 struct ifreq ifr;
848 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
849 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
850 return ifr.ifr_ifindex;
851 else
852 return 0;
853 }
854
855 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
856 {
857 struct ifreq ifr;
858
859 memset(&ifr, 0, sizeof(ifr));
860 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
861 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
862 return -1;
863
864 ifr.ifr_flags |= add;
865 ifr.ifr_flags &= ~rem;
866 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
867 }
868
869 struct clear_data {
870 struct nl_msg *msg;
871 struct device *dev;
872 int type;
873 int size;
874 int af;
875 };
876
877
878 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
879 {
880 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
881
882 return ifa->ifa_index == ifindex;
883 }
884
885 static bool check_route(struct nlmsghdr *hdr, int ifindex)
886 {
887 struct rtmsg *r = NLMSG_DATA(hdr);
888 struct nlattr *tb[__RTA_MAX];
889
890 if (r->rtm_protocol == RTPROT_KERNEL &&
891 r->rtm_family == AF_INET6)
892 return false;
893
894 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
895 if (!tb[RTA_OIF])
896 return false;
897
898 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
899 }
900
901 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
902 {
903 return true;
904 }
905
906 static int cb_clear_event(struct nl_msg *msg, void *arg)
907 {
908 struct clear_data *clr = arg;
909 struct nlmsghdr *hdr = nlmsg_hdr(msg);
910 bool (*cb)(struct nlmsghdr *, int ifindex);
911 int type, ret;
912
913 switch(clr->type) {
914 case RTM_GETADDR:
915 type = RTM_DELADDR;
916 if (hdr->nlmsg_type != RTM_NEWADDR)
917 return NL_SKIP;
918
919 cb = check_ifaddr;
920 break;
921 case RTM_GETROUTE:
922 type = RTM_DELROUTE;
923 if (hdr->nlmsg_type != RTM_NEWROUTE)
924 return NL_SKIP;
925
926 cb = check_route;
927 break;
928 case RTM_GETRULE:
929 type = RTM_DELRULE;
930 if (hdr->nlmsg_type != RTM_NEWRULE)
931 return NL_SKIP;
932
933 cb = check_rule;
934 break;
935 default:
936 return NL_SKIP;
937 }
938
939 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
940 return NL_SKIP;
941
942 if (type == RTM_DELRULE)
943 D(SYSTEM, "Remove a rule\n");
944 else
945 D(SYSTEM, "Remove %s from device %s\n",
946 type == RTM_DELADDR ? "an address" : "a route",
947 clr->dev->ifname);
948
949 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
950 hdr = nlmsg_hdr(clr->msg);
951 hdr->nlmsg_type = type;
952 hdr->nlmsg_flags = NLM_F_REQUEST;
953
954 nl_socket_disable_auto_ack(sock_rtnl);
955 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
956 if (ret < 0) {
957 if (type == RTM_DELRULE)
958 D(SYSTEM, "Error deleting a rule: %d\n", ret);
959 else
960 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
961 type == RTM_DELADDR ? "an address" : "a route",
962 clr->dev->ifname, ret);
963 }
964
965 nl_socket_enable_auto_ack(sock_rtnl);
966
967 return NL_SKIP;
968 }
969
970 static int
971 cb_finish_event(struct nl_msg *msg, void *arg)
972 {
973 int *pending = arg;
974 *pending = 0;
975 return NL_STOP;
976 }
977
978 static int
979 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
980 {
981 int *pending = arg;
982 *pending = err->error;
983 return NL_STOP;
984 }
985
986 static void
987 system_if_clear_entries(struct device *dev, int type, int af)
988 {
989 struct clear_data clr;
990 struct nl_cb *cb;
991 struct rtmsg rtm = {
992 .rtm_family = af,
993 .rtm_flags = RTM_F_CLONED,
994 };
995 int flags = NLM_F_DUMP;
996 int pending = 1;
997
998 clr.af = af;
999 clr.dev = dev;
1000 clr.type = type;
1001 switch (type) {
1002 case RTM_GETADDR:
1003 case RTM_GETRULE:
1004 clr.size = sizeof(struct rtgenmsg);
1005 break;
1006 case RTM_GETROUTE:
1007 clr.size = sizeof(struct rtmsg);
1008 break;
1009 default:
1010 return;
1011 }
1012
1013 cb = nl_cb_alloc(NL_CB_DEFAULT);
1014 if (!cb)
1015 return;
1016
1017 clr.msg = nlmsg_alloc_simple(type, flags);
1018 if (!clr.msg)
1019 goto out;
1020
1021 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1022 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1023 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1024 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1025
1026 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1027 goto free;
1028
1029 while (pending > 0)
1030 nl_recvmsgs(sock_rtnl, cb);
1031
1032 free:
1033 nlmsg_free(clr.msg);
1034 out:
1035 nl_cb_put(cb);
1036 }
1037
1038 /*
1039 * Clear bridge (membership) state and bring down device
1040 */
1041 void system_if_clear_state(struct device *dev)
1042 {
1043 static char buf[256];
1044 char *bridge;
1045 device_set_ifindex(dev, system_if_resolve(dev));
1046
1047 if (dev->external || !dev->ifindex)
1048 return;
1049
1050 system_if_flags(dev->ifname, 0, IFF_UP);
1051
1052 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
1053 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1054 system_bridge_delbr(dev);
1055 return;
1056 }
1057
1058 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1059 if (bridge) {
1060 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1061 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1062 }
1063
1064 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1065 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1066 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1067 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1068 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1069 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1070 system_set_disable_ipv6(dev, "0");
1071 }
1072
1073 static inline unsigned long
1074 sec_to_jiffies(int val)
1075 {
1076 return (unsigned long) val * 100;
1077 }
1078
1079 static void system_bridge_conf_multicast_deps(struct device *bridge,
1080 struct bridge_config *cfg,
1081 char *buf,
1082 int buf_len)
1083 {
1084 int val;
1085
1086 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1087 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1088 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1089 val = cfg->robustness * cfg->query_interval +
1090 cfg->query_response_interval;
1091
1092 snprintf(buf, buf_len, "%i", val);
1093 system_bridge_set_membership_interval(bridge, buf);
1094
1095 val = cfg->robustness * cfg->query_interval +
1096 cfg->query_response_interval / 2;
1097
1098 snprintf(buf, buf_len, "%i", val);
1099 system_bridge_set_other_querier_timeout(bridge, buf);
1100 }
1101
1102 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1103 val = cfg->query_interval / 4;
1104
1105 snprintf(buf, buf_len, "%i", val);
1106 system_bridge_set_startup_query_interval(bridge, buf);
1107 }
1108 }
1109
1110 static void system_bridge_conf_multicast(struct device *bridge,
1111 struct bridge_config *cfg,
1112 char *buf,
1113 int buf_len)
1114 {
1115 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1116 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1117
1118 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1119 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1120
1121 snprintf(buf, buf_len, "%i", cfg->hash_max);
1122 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1123 bridge->ifname, buf);
1124
1125 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1126 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1127 system_bridge_set_multicast_router(bridge, buf, true);
1128 }
1129
1130 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1131 snprintf(buf, buf_len, "%i", cfg->robustness);
1132 system_bridge_set_robustness(bridge, buf);
1133 }
1134
1135 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1136 snprintf(buf, buf_len, "%i", cfg->query_interval);
1137 system_bridge_set_query_interval(bridge, buf);
1138 }
1139
1140 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1141 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1142 system_bridge_set_query_response_interval(bridge, buf);
1143 }
1144
1145 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1146 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1147 system_bridge_set_last_member_interval(bridge, buf);
1148 }
1149
1150 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1151 }
1152
1153 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1154 {
1155 char buf[64];
1156
1157 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1158 return -1;
1159
1160 system_bridge_set_stp_state(bridge, cfg->stp ? "1" : "0");
1161
1162 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1163 system_bridge_set_forward_delay(bridge, buf);
1164
1165 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1166
1167 snprintf(buf, sizeof(buf), "%d", cfg->priority);
1168 system_bridge_set_priority(bridge, buf);
1169
1170 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1171 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1172 system_bridge_set_ageing_time(bridge, buf);
1173 }
1174
1175 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1176 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1177 system_bridge_set_hello_time(bridge, buf);
1178 }
1179
1180 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1181 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1182 system_bridge_set_max_age(bridge, buf);
1183 }
1184
1185 return 0;
1186 }
1187
1188 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1189 {
1190 struct nl_msg *msg;
1191 struct nlattr *linkinfo, *data;
1192 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1193 int i, rv;
1194 static const struct {
1195 const char *name;
1196 enum macvlan_mode val;
1197 } modes[] = {
1198 { "private", MACVLAN_MODE_PRIVATE },
1199 { "vepa", MACVLAN_MODE_VEPA },
1200 { "bridge", MACVLAN_MODE_BRIDGE },
1201 { "passthru", MACVLAN_MODE_PASSTHRU },
1202 };
1203
1204 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1205
1206 if (!msg)
1207 return -1;
1208
1209 nlmsg_append(msg, &iim, sizeof(iim), 0);
1210
1211 if (cfg->flags & MACVLAN_OPT_MACADDR)
1212 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1213 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1214 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1215
1216 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1217 goto nla_put_failure;
1218
1219 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1220
1221 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1222 goto nla_put_failure;
1223
1224 if (cfg->mode) {
1225 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1226 if (strcmp(cfg->mode, modes[i].name) != 0)
1227 continue;
1228
1229 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1230 break;
1231 }
1232 }
1233
1234 nla_nest_end(msg, data);
1235 nla_nest_end(msg, linkinfo);
1236
1237 rv = system_rtnl_call(msg);
1238 if (rv)
1239 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1240
1241 return rv;
1242
1243 nla_put_failure:
1244 nlmsg_free(msg);
1245 return -ENOMEM;
1246 }
1247
1248 int system_link_netns_move(const char *ifname, int netns_fd)
1249 {
1250 struct nl_msg *msg;
1251 struct ifinfomsg iim = {
1252 .ifi_family = AF_UNSPEC,
1253 .ifi_index = 0,
1254 };
1255
1256 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1257
1258 if (!msg)
1259 return -1;
1260
1261 nlmsg_append(msg, &iim, sizeof(iim), 0);
1262 nla_put_string(msg, IFLA_IFNAME, ifname);
1263 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1264 return system_rtnl_call(msg);
1265 }
1266
1267 static int system_link_del(const char *ifname)
1268 {
1269 struct nl_msg *msg;
1270 struct ifinfomsg iim = {
1271 .ifi_family = AF_UNSPEC,
1272 .ifi_index = 0,
1273 };
1274
1275 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1276
1277 if (!msg)
1278 return -1;
1279
1280 nlmsg_append(msg, &iim, sizeof(iim), 0);
1281 nla_put_string(msg, IFLA_IFNAME, ifname);
1282 return system_rtnl_call(msg);
1283 }
1284
1285 int system_macvlan_del(struct device *macvlan)
1286 {
1287 return system_link_del(macvlan->ifname);
1288 }
1289
1290 int system_netns_open(const pid_t target_ns)
1291 {
1292 char pid_net_path[PATH_MAX];
1293
1294 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1295
1296 return open(pid_net_path, O_RDONLY);
1297 }
1298
1299 int system_netns_set(int netns_fd)
1300 {
1301 return setns(netns_fd, CLONE_NEWNET);
1302 }
1303
1304 int system_veth_add(struct device *veth, struct veth_config *cfg)
1305 {
1306 struct nl_msg *msg;
1307 struct ifinfomsg empty_iim = {};
1308 struct nlattr *linkinfo, *data, *veth_info;
1309 int rv;
1310
1311 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1312
1313 if (!msg)
1314 return -1;
1315
1316 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1317
1318 if (cfg->flags & VETH_OPT_MACADDR)
1319 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1320 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1321
1322 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1323 goto nla_put_failure;
1324
1325 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1326
1327 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1328 goto nla_put_failure;
1329
1330 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1331 goto nla_put_failure;
1332
1333 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1334
1335 if (cfg->flags & VETH_OPT_PEER_NAME)
1336 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1337 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1338 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1339
1340 nla_nest_end(msg, veth_info);
1341 nla_nest_end(msg, data);
1342 nla_nest_end(msg, linkinfo);
1343
1344 rv = system_rtnl_call(msg);
1345 if (rv) {
1346 if (cfg->flags & VETH_OPT_PEER_NAME)
1347 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1348 else
1349 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1350 }
1351
1352 return rv;
1353
1354 nla_put_failure:
1355 nlmsg_free(msg);
1356 return -ENOMEM;
1357 }
1358
1359 int system_veth_del(struct device *veth)
1360 {
1361 return system_link_del(veth->ifname);
1362 }
1363
1364 static int system_vlan(struct device *dev, int id)
1365 {
1366 struct vlan_ioctl_args ifr = {
1367 .cmd = SET_VLAN_NAME_TYPE_CMD,
1368 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1369 };
1370
1371 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1372 return -1;
1373
1374 if (id < 0) {
1375 ifr.cmd = DEL_VLAN_CMD;
1376 ifr.u.VID = 0;
1377 } else {
1378 ifr.cmd = ADD_VLAN_CMD;
1379 ifr.u.VID = id;
1380 }
1381 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1382 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1383 }
1384
1385 int system_vlan_add(struct device *dev, int id)
1386 {
1387 return system_vlan(dev, id);
1388 }
1389
1390 int system_vlan_del(struct device *dev)
1391 {
1392 return system_vlan(dev, -1);
1393 }
1394
1395 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1396 {
1397 struct nl_msg *msg;
1398 struct nlattr *linkinfo, *data;
1399 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1400 int rv;
1401
1402 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1403
1404 if (!msg)
1405 return -1;
1406
1407 nlmsg_append(msg, &iim, sizeof(iim), 0);
1408 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1409 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1410
1411 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1412 goto nla_put_failure;
1413
1414 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1415
1416 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1417 goto nla_put_failure;
1418
1419 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1420
1421 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1422 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1423 #else
1424 if(cfg->proto == VLAN_PROTO_8021AD)
1425 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);
1426 #endif
1427
1428 nla_nest_end(msg, data);
1429 nla_nest_end(msg, linkinfo);
1430
1431 rv = system_rtnl_call(msg);
1432 if (rv)
1433 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1434
1435 return rv;
1436
1437 nla_put_failure:
1438 nlmsg_free(msg);
1439 return -ENOMEM;
1440 }
1441
1442 int system_vlandev_del(struct device *vlandev)
1443 {
1444 return system_link_del(vlandev->ifname);
1445 }
1446
1447 void
1448 system_if_get_settings(struct device *dev, struct device_settings *s)
1449 {
1450 struct ifreq ifr;
1451 char buf[10];
1452
1453 memset(&ifr, 0, sizeof(ifr));
1454 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1455
1456 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1457 s->mtu = ifr.ifr_mtu;
1458 s->flags |= DEV_OPT_MTU;
1459 }
1460
1461 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1462 if (s->mtu6 > 0)
1463 s->flags |= DEV_OPT_MTU6;
1464
1465 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1466 s->txqueuelen = ifr.ifr_qlen;
1467 s->flags |= DEV_OPT_TXQUEUELEN;
1468 }
1469
1470 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1471 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1472 s->flags |= DEV_OPT_MACADDR;
1473 }
1474
1475 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1476 s->ipv6 = !strtoul(buf, NULL, 0);
1477 s->flags |= DEV_OPT_IPV6;
1478 }
1479
1480 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1481 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1482 s->flags |= DEV_OPT_PROMISC;
1483
1484 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1485 s->flags |= DEV_OPT_MULTICAST;
1486 }
1487
1488 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1489 s->rpfilter = strtoul(buf, NULL, 0);
1490 s->flags |= DEV_OPT_RPFILTER;
1491 }
1492
1493 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1494 s->acceptlocal = strtoul(buf, NULL, 0);
1495 s->flags |= DEV_OPT_ACCEPTLOCAL;
1496 }
1497
1498 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1499 s->igmpversion = strtoul(buf, NULL, 0);
1500 s->flags |= DEV_OPT_IGMPVERSION;
1501 }
1502
1503 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1504 s->mldversion = strtoul(buf, NULL, 0);
1505 s->flags |= DEV_OPT_MLDVERSION;
1506 }
1507
1508 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1509 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1510 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1511 }
1512
1513 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1514 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1515 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1516 }
1517
1518 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1519 s->neigh4locktime = strtol(buf, NULL, 0);
1520 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1521 }
1522
1523 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1524 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1525 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1526 }
1527
1528 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1529 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1530 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1531 }
1532
1533 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1534 s->dadtransmits = strtoul(buf, NULL, 0);
1535 s->flags |= DEV_OPT_DADTRANSMITS;
1536 }
1537
1538 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1539 s->sendredirects = strtoul(buf, NULL, 0);
1540 s->flags |= DEV_OPT_SENDREDIRECTS;
1541 }
1542 }
1543
1544 void
1545 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1546 {
1547 struct ifreq ifr;
1548 char buf[12];
1549
1550 memset(&ifr, 0, sizeof(ifr));
1551 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1552 if (s->flags & DEV_OPT_MTU & apply_mask) {
1553 ifr.ifr_mtu = s->mtu;
1554 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1555 s->flags &= ~DEV_OPT_MTU;
1556 }
1557 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1558 system_update_ipv6_mtu(dev, s->mtu6);
1559 }
1560 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1561 ifr.ifr_qlen = s->txqueuelen;
1562 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1563 s->flags &= ~DEV_OPT_TXQUEUELEN;
1564 }
1565 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1566 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1567 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1568 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1569 s->flags &= ~DEV_OPT_MACADDR;
1570 }
1571 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1572 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1573 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1574 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1575 !s->promisc ? IFF_PROMISC : 0) < 0)
1576 s->flags &= ~DEV_OPT_PROMISC;
1577 }
1578 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1579 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1580 system_set_rpfilter(dev, buf);
1581 }
1582 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1583 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1584 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1585 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1586 system_set_igmpversion(dev, buf);
1587 }
1588 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1589 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1590 system_set_mldversion(dev, buf);
1591 }
1592 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1593 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1594 system_set_neigh4reachabletime(dev, buf);
1595 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1596 system_set_neigh6reachabletime(dev, buf);
1597 }
1598 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1599 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1600 system_set_neigh4locktime(dev, buf);
1601 }
1602 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1603 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1604 system_set_neigh4gcstaletime(dev, buf);
1605 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1606 system_set_neigh6gcstaletime(dev, buf);
1607 }
1608 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1609 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1610 system_set_dadtransmits(dev, buf);
1611 }
1612 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1613 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1614 !s->multicast ? IFF_MULTICAST : 0) < 0)
1615 s->flags &= ~DEV_OPT_MULTICAST;
1616 }
1617 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1618 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1619 }
1620
1621 int system_if_up(struct device *dev)
1622 {
1623 system_if_get_settings(dev, &dev->orig_settings);
1624 /* Only keep orig settings based on what needs to be set */
1625 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1626 dev->orig_settings.flags &= dev->settings.flags;
1627 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1628 return system_if_flags(dev->ifname, IFF_UP, 0);
1629 }
1630
1631 int system_if_down(struct device *dev)
1632 {
1633 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1634 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1635 return ret;
1636 }
1637
1638 struct if_check_data {
1639 struct device *dev;
1640 int pending;
1641 int ret;
1642 };
1643
1644 #ifndef IFF_LOWER_UP
1645 #define IFF_LOWER_UP 0x10000
1646 #endif
1647
1648 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1649 {
1650 struct nlmsghdr *nh = nlmsg_hdr(msg);
1651 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1652 struct if_check_data *chk = (struct if_check_data *)arg;
1653
1654 if (nh->nlmsg_type != RTM_NEWLINK)
1655 return NL_SKIP;
1656
1657 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1658 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1659
1660 return NL_OK;
1661 }
1662
1663 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1664 {
1665 struct if_check_data *chk = (struct if_check_data *)arg;
1666 chk->pending = 0;
1667 return NL_STOP;
1668 }
1669
1670 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1671 {
1672 struct if_check_data *chk = (struct if_check_data *)arg;
1673
1674 device_set_present(chk->dev, false);
1675 device_set_link(chk->dev, false);
1676 chk->pending = err->error;
1677
1678 return NL_STOP;
1679 }
1680
1681 int system_if_check(struct device *dev)
1682 {
1683 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1684 struct nl_msg *msg;
1685 struct ifinfomsg ifi = {
1686 .ifi_family = AF_UNSPEC,
1687 .ifi_index = 0,
1688 };
1689 struct if_check_data chk = {
1690 .dev = dev,
1691 .pending = 1,
1692 };
1693 int ret = 1;
1694
1695 if (!cb)
1696 return ret;
1697
1698 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1699 if (!msg)
1700 goto out;
1701
1702 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1703 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1704 goto free;
1705
1706 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1707 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1708 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1709
1710 ret = nl_send_auto_complete(sock_rtnl, msg);
1711 if (ret < 0)
1712 goto free;
1713
1714 while (chk.pending > 0)
1715 nl_recvmsgs(sock_rtnl, cb);
1716
1717 ret = chk.pending;
1718
1719 free:
1720 nlmsg_free(msg);
1721 out:
1722 nl_cb_put(cb);
1723 return ret;
1724 }
1725
1726 struct device *
1727 system_if_get_parent(struct device *dev)
1728 {
1729 char buf[64], *devname;
1730 int ifindex, iflink, len;
1731 FILE *f;
1732
1733 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1734 f = fopen(buf, "r");
1735 if (!f)
1736 return NULL;
1737
1738 len = fread(buf, 1, sizeof(buf) - 1, f);
1739 fclose(f);
1740
1741 if (len <= 0)
1742 return NULL;
1743
1744 buf[len] = 0;
1745 iflink = strtoul(buf, NULL, 0);
1746 ifindex = system_if_resolve(dev);
1747 if (!iflink || iflink == ifindex)
1748 return NULL;
1749
1750 devname = if_indextoname(iflink, buf);
1751 if (!devname)
1752 return NULL;
1753
1754 return device_get(devname, true);
1755 }
1756
1757 static bool
1758 read_string_file(int dir_fd, const char *file, char *buf, int len)
1759 {
1760 bool ret = false;
1761 char *c;
1762 int fd;
1763
1764 fd = openat(dir_fd, file, O_RDONLY);
1765 if (fd < 0)
1766 return false;
1767
1768 retry:
1769 len = read(fd, buf, len - 1);
1770 if (len < 0) {
1771 if (errno == EINTR)
1772 goto retry;
1773 } else if (len > 0) {
1774 buf[len] = 0;
1775
1776 c = strchr(buf, '\n');
1777 if (c)
1778 *c = 0;
1779
1780 ret = true;
1781 }
1782
1783 close(fd);
1784
1785 return ret;
1786 }
1787
1788 static bool
1789 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1790 {
1791 char buf[64];
1792 bool ret = false;
1793
1794 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1795 if (ret)
1796 *val = strtoull(buf, NULL, 0);
1797
1798 return ret;
1799 }
1800
1801 /* Assume advertised flags == supported flags */
1802 static const struct {
1803 uint32_t mask;
1804 const char *name;
1805 } ethtool_link_modes[] = {
1806 { ADVERTISED_10baseT_Half, "10baseT-H" },
1807 { ADVERTISED_10baseT_Full, "10baseT-F" },
1808 { ADVERTISED_100baseT_Half, "100baseT-H" },
1809 { ADVERTISED_100baseT_Full, "100baseT-F" },
1810 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1811 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1812 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1813 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1814 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1815 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1816 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1817 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1818 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1819 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1820 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1821 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1822 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1823 #ifdef ADVERTISED_56000baseKR4_Full
1824 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1825 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1826 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1827 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1828 #endif
1829 };
1830
1831 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1832 {
1833 int i;
1834 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1835 if (mask & ethtool_link_modes[i].mask)
1836 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1837 }
1838 }
1839
1840 bool
1841 system_if_force_external(const char *ifname)
1842 {
1843 char buf[64];
1844 struct stat s;
1845
1846 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1847 return stat(buf, &s) == 0;
1848 }
1849
1850 int
1851 system_if_dump_info(struct device *dev, struct blob_buf *b)
1852 {
1853 struct ethtool_cmd ecmd;
1854 struct ifreq ifr;
1855 char *s;
1856 void *c;
1857
1858 memset(&ecmd, 0, sizeof(ecmd));
1859 memset(&ifr, 0, sizeof(ifr));
1860 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1861 ifr.ifr_data = (caddr_t) &ecmd;
1862 ecmd.cmd = ETHTOOL_GSET;
1863
1864 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1865 c = blobmsg_open_array(b, "link-advertising");
1866 system_add_link_modes(b, ecmd.advertising);
1867 blobmsg_close_array(b, c);
1868
1869 c = blobmsg_open_array(b, "link-partner-advertising");
1870 system_add_link_modes(b, ecmd.lp_advertising);
1871 blobmsg_close_array(b, c);
1872
1873 c = blobmsg_open_array(b, "link-supported");
1874 system_add_link_modes(b, ecmd.supported);
1875 blobmsg_close_array(b, c);
1876
1877 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1878 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1879 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1880 blobmsg_add_string_buffer(b);
1881
1882 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1883 }
1884
1885 return 0;
1886 }
1887
1888 int
1889 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1890 {
1891 const char *const counters[] = {
1892 "collisions", "rx_frame_errors", "tx_compressed",
1893 "multicast", "rx_length_errors", "tx_dropped",
1894 "rx_bytes", "rx_missed_errors", "tx_errors",
1895 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1896 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1897 "rx_dropped", "tx_aborted_errors", "tx_packets",
1898 "rx_errors", "tx_bytes", "tx_window_errors",
1899 "rx_fifo_errors", "tx_carrier_errors",
1900 };
1901 char buf[64];
1902 int stats_dir;
1903 int i;
1904 uint64_t val = 0;
1905
1906 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1907 stats_dir = open(buf, O_DIRECTORY);
1908 if (stats_dir < 0)
1909 return -1;
1910
1911 for (i = 0; i < ARRAY_SIZE(counters); i++)
1912 if (read_uint64_file(stats_dir, counters[i], &val))
1913 blobmsg_add_u64(b, counters[i], val);
1914
1915 close(stats_dir);
1916 return 0;
1917 }
1918
1919 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1920 {
1921 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1922 int alen = v4 ? 4 : 16;
1923 unsigned int flags = 0;
1924 struct ifaddrmsg ifa = {
1925 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1926 .ifa_prefixlen = addr->mask,
1927 .ifa_index = dev->ifindex,
1928 };
1929
1930 struct nl_msg *msg;
1931 if (cmd == RTM_NEWADDR)
1932 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1933
1934 msg = nlmsg_alloc_simple(cmd, flags);
1935 if (!msg)
1936 return -1;
1937
1938 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1939 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1940 if (v4) {
1941 if (addr->broadcast)
1942 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1943 if (addr->point_to_point)
1944 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1945 } else {
1946 time_t now = system_get_rtime();
1947 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1948
1949 if (addr->preferred_until) {
1950 int64_t preferred = addr->preferred_until - now;
1951 if (preferred < 0)
1952 preferred = 0;
1953 else if (preferred > UINT32_MAX)
1954 preferred = UINT32_MAX;
1955
1956 cinfo.ifa_prefered = preferred;
1957 }
1958
1959 if (addr->valid_until) {
1960 int64_t valid = addr->valid_until - now;
1961 if (valid <= 0) {
1962 nlmsg_free(msg);
1963 return -1;
1964 }
1965 else if (valid > UINT32_MAX)
1966 valid = UINT32_MAX;
1967
1968 cinfo.ifa_valid = valid;
1969 }
1970
1971 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1972
1973 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1974 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1975 }
1976
1977 return system_rtnl_call(msg);
1978 }
1979
1980 int system_add_address(struct device *dev, struct device_addr *addr)
1981 {
1982 return system_addr(dev, addr, RTM_NEWADDR);
1983 }
1984
1985 int system_del_address(struct device *dev, struct device_addr *addr)
1986 {
1987 return system_addr(dev, addr, RTM_DELADDR);
1988 }
1989
1990 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
1991 {
1992 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1993 unsigned int flags = 0;
1994 struct ndmsg ndm = {
1995 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
1996 .ndm_ifindex = dev->ifindex,
1997 .ndm_state = NUD_PERMANENT,
1998 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
1999 };
2000 struct nl_msg *msg;
2001
2002 if (cmd == RTM_NEWNEIGH)
2003 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2004
2005 msg = nlmsg_alloc_simple(cmd, flags);
2006
2007 if (!msg)
2008 return -1;
2009
2010 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2011
2012 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2013 if (neighbor->flags & DEVNEIGH_MAC)
2014 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2015
2016
2017 return system_rtnl_call(msg);
2018 }
2019
2020 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2021 {
2022 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2023 }
2024
2025 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2026 {
2027 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2028 }
2029
2030 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2031 {
2032 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2033 bool have_gw;
2034 unsigned int flags = 0;
2035
2036 if (alen == 4)
2037 have_gw = !!route->nexthop.in.s_addr;
2038 else
2039 have_gw = route->nexthop.in6.s6_addr32[0] ||
2040 route->nexthop.in6.s6_addr32[1] ||
2041 route->nexthop.in6.s6_addr32[2] ||
2042 route->nexthop.in6.s6_addr32[3];
2043
2044 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2045 ? route->table : RT_TABLE_MAIN;
2046
2047 struct rtmsg rtm = {
2048 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2049 .rtm_dst_len = route->mask,
2050 .rtm_src_len = route->sourcemask,
2051 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2052 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2053 .rtm_scope = RT_SCOPE_NOWHERE,
2054 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2055 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2056 };
2057 struct nl_msg *msg;
2058
2059 if (cmd == RTM_NEWROUTE) {
2060 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2061
2062 if (!dev) { /* Add null-route */
2063 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2064 rtm.rtm_type = RTN_UNREACHABLE;
2065 }
2066 else
2067 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2068 }
2069
2070 if (route->flags & DEVROUTE_TYPE) {
2071 rtm.rtm_type = route->type;
2072 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2073 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2074 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2075 rtm.rtm_table = RT_TABLE_LOCAL;
2076 }
2077
2078 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2079 rtm.rtm_scope = RT_SCOPE_HOST;
2080 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2081 rtm.rtm_type == RTN_ANYCAST) {
2082 rtm.rtm_scope = RT_SCOPE_LINK;
2083 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2084 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2085 rtm.rtm_type == RTN_THROW) {
2086 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2087 dev = NULL;
2088 }
2089 }
2090
2091 msg = nlmsg_alloc_simple(cmd, flags);
2092 if (!msg)
2093 return -1;
2094
2095 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2096
2097 if (route->mask)
2098 nla_put(msg, RTA_DST, alen, &route->addr);
2099
2100 if (route->sourcemask) {
2101 if (rtm.rtm_family == AF_INET)
2102 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2103 else
2104 nla_put(msg, RTA_SRC, alen, &route->source);
2105 }
2106
2107 if (route->metric > 0)
2108 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2109
2110 if (have_gw)
2111 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2112
2113 if (dev)
2114 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2115
2116 if (table >= 256)
2117 nla_put_u32(msg, RTA_TABLE, table);
2118
2119 if (route->flags & DEVROUTE_MTU) {
2120 struct nlattr *metrics;
2121
2122 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2123 goto nla_put_failure;
2124
2125 nla_put_u32(msg, RTAX_MTU, route->mtu);
2126
2127 nla_nest_end(msg, metrics);
2128 }
2129
2130 return system_rtnl_call(msg);
2131
2132 nla_put_failure:
2133 nlmsg_free(msg);
2134 return -ENOMEM;
2135 }
2136
2137 int system_add_route(struct device *dev, struct device_route *route)
2138 {
2139 return system_rt(dev, route, RTM_NEWROUTE);
2140 }
2141
2142 int system_del_route(struct device *dev, struct device_route *route)
2143 {
2144 return system_rt(dev, route, RTM_DELROUTE);
2145 }
2146
2147 int system_flush_routes(void)
2148 {
2149 const char *names[] = {
2150 "/proc/sys/net/ipv4/route/flush",
2151 "/proc/sys/net/ipv6/route/flush"
2152 };
2153 int fd, i;
2154
2155 for (i = 0; i < ARRAY_SIZE(names); i++) {
2156 fd = open(names[i], O_WRONLY);
2157 if (fd < 0)
2158 continue;
2159
2160 if (write(fd, "-1", 2)) {}
2161 close(fd);
2162 }
2163 return 0;
2164 }
2165
2166 bool system_resolve_rt_type(const char *type, unsigned int *id)
2167 {
2168 return system_rtn_aton(type, id);
2169 }
2170
2171 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2172 {
2173 FILE *f;
2174 char *e, buf[128];
2175 unsigned int n, proto = 256;
2176 n = strtoul(type, &e, 0);
2177 if (!*e && e != type)
2178 proto = n;
2179 else if (!strcmp(type, "unspec"))
2180 proto = RTPROT_UNSPEC;
2181 else if (!strcmp(type, "kernel"))
2182 proto = RTPROT_KERNEL;
2183 else if (!strcmp(type, "boot"))
2184 proto = RTPROT_BOOT;
2185 else if (!strcmp(type, "static"))
2186 proto = RTPROT_STATIC;
2187 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2188 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2189 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2190 continue;
2191
2192 n = strtoul(e, NULL, 10);
2193 e = strtok(NULL, " \t\n");
2194
2195 if (e && !strcmp(e, type)) {
2196 proto = n;
2197 break;
2198 }
2199 }
2200 fclose(f);
2201 }
2202
2203 if (proto > 255)
2204 return false;
2205
2206 *id = proto;
2207 return true;
2208 }
2209
2210 bool system_resolve_rt_table(const char *name, unsigned int *id)
2211 {
2212 FILE *f;
2213 char *e, buf[128];
2214 unsigned int n, table = RT_TABLE_UNSPEC;
2215
2216 /* first try to parse table as number */
2217 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2218 table = n;
2219
2220 /* handle well known aliases */
2221 else if (!strcmp(name, "default"))
2222 table = RT_TABLE_DEFAULT;
2223 else if (!strcmp(name, "main"))
2224 table = RT_TABLE_MAIN;
2225 else if (!strcmp(name, "local"))
2226 table = RT_TABLE_LOCAL;
2227
2228 /* try to look up name in /etc/iproute2/rt_tables */
2229 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2230 {
2231 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2232 {
2233 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2234 continue;
2235
2236 n = strtoul(e, NULL, 10);
2237 e = strtok(NULL, " \t\n");
2238
2239 if (e && !strcmp(e, name))
2240 {
2241 table = n;
2242 break;
2243 }
2244 }
2245
2246 fclose(f);
2247 }
2248
2249 if (table == RT_TABLE_UNSPEC)
2250 return false;
2251
2252 *id = table;
2253 return true;
2254 }
2255
2256 bool system_is_default_rt_table(unsigned int id)
2257 {
2258 return (id == RT_TABLE_MAIN);
2259 }
2260
2261 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2262 {
2263 char *e;
2264 unsigned int n;
2265
2266 if (!strcmp(filter, "strict"))
2267 n = 1;
2268 else if (!strcmp(filter, "loose"))
2269 n = 2;
2270 else {
2271 n = strtoul(filter, &e, 0);
2272 if (*e || e == filter || n > 2)
2273 return false;
2274 }
2275
2276 *id = n;
2277 return true;
2278 }
2279
2280 static int system_iprule(struct iprule *rule, int cmd)
2281 {
2282 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2283
2284 struct nl_msg *msg;
2285 struct rtmsg rtm = {
2286 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2287 .rtm_protocol = RTPROT_STATIC,
2288 .rtm_scope = RT_SCOPE_UNIVERSE,
2289 .rtm_table = RT_TABLE_UNSPEC,
2290 .rtm_type = RTN_UNSPEC,
2291 .rtm_flags = 0,
2292 };
2293
2294 if (cmd == RTM_NEWRULE)
2295 rtm.rtm_type = RTN_UNICAST;
2296
2297 if (rule->invert)
2298 rtm.rtm_flags |= FIB_RULE_INVERT;
2299
2300 if (rule->flags & IPRULE_SRC)
2301 rtm.rtm_src_len = rule->src_mask;
2302
2303 if (rule->flags & IPRULE_DEST)
2304 rtm.rtm_dst_len = rule->dest_mask;
2305
2306 if (rule->flags & IPRULE_TOS)
2307 rtm.rtm_tos = rule->tos;
2308
2309 if (rule->flags & IPRULE_LOOKUP) {
2310 if (rule->lookup < 256)
2311 rtm.rtm_table = rule->lookup;
2312 }
2313
2314 if (rule->flags & IPRULE_ACTION)
2315 rtm.rtm_type = rule->action;
2316 else if (rule->flags & IPRULE_GOTO)
2317 rtm.rtm_type = FR_ACT_GOTO;
2318 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2319 rtm.rtm_type = FR_ACT_NOP;
2320
2321 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2322
2323 if (!msg)
2324 return -1;
2325
2326 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2327
2328 if (rule->flags & IPRULE_IN)
2329 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2330
2331 if (rule->flags & IPRULE_OUT)
2332 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2333
2334 if (rule->flags & IPRULE_SRC)
2335 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2336
2337 if (rule->flags & IPRULE_DEST)
2338 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2339
2340 if (rule->flags & IPRULE_PRIORITY)
2341 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2342 else if (cmd == RTM_NEWRULE)
2343 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2344
2345 if (rule->flags & IPRULE_FWMARK)
2346 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2347
2348 if (rule->flags & IPRULE_FWMASK)
2349 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2350
2351 if (rule->flags & IPRULE_LOOKUP) {
2352 if (rule->lookup >= 256)
2353 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2354 }
2355
2356 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2357 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2358
2359 if (rule->flags & IPRULE_GOTO)
2360 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2361
2362 return system_rtnl_call(msg);
2363 }
2364
2365 int system_add_iprule(struct iprule *rule)
2366 {
2367 return system_iprule(rule, RTM_NEWRULE);
2368 }
2369
2370 int system_del_iprule(struct iprule *rule)
2371 {
2372 return system_iprule(rule, RTM_DELRULE);
2373 }
2374
2375 int system_flush_iprules(void)
2376 {
2377 int rv = 0;
2378 struct iprule rule;
2379
2380 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2381 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2382
2383 memset(&rule, 0, sizeof(rule));
2384
2385
2386 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2387
2388 rule.priority = 0;
2389 rule.lookup = RT_TABLE_LOCAL;
2390 rv |= system_iprule(&rule, RTM_NEWRULE);
2391
2392 rule.priority = 32766;
2393 rule.lookup = RT_TABLE_MAIN;
2394 rv |= system_iprule(&rule, RTM_NEWRULE);
2395
2396 rule.priority = 32767;
2397 rule.lookup = RT_TABLE_DEFAULT;
2398 rv |= system_iprule(&rule, RTM_NEWRULE);
2399
2400
2401 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2402
2403 rule.priority = 0;
2404 rule.lookup = RT_TABLE_LOCAL;
2405 rv |= system_iprule(&rule, RTM_NEWRULE);
2406
2407 rule.priority = 32766;
2408 rule.lookup = RT_TABLE_MAIN;
2409 rv |= system_iprule(&rule, RTM_NEWRULE);
2410
2411 return rv;
2412 }
2413
2414 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2415 {
2416 return system_rtn_aton(action, id);
2417 }
2418
2419 time_t system_get_rtime(void)
2420 {
2421 struct timespec ts;
2422 struct timeval tv;
2423
2424 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2425 return ts.tv_sec;
2426
2427 if (gettimeofday(&tv, NULL) == 0)
2428 return tv.tv_sec;
2429
2430 return 0;
2431 }
2432
2433 #ifndef IP_DF
2434 #define IP_DF 0x4000
2435 #endif
2436
2437 static int tunnel_ioctl(const char *name, int cmd, void *p)
2438 {
2439 struct ifreq ifr;
2440
2441 memset(&ifr, 0, sizeof(ifr));
2442 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2443 ifr.ifr_ifru.ifru_data = p;
2444 return ioctl(sock_ioctl, cmd, &ifr);
2445 }
2446
2447 #ifdef IFLA_IPTUN_MAX
2448 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2449 struct blob_attr **tb)
2450 {
2451 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2452 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2453 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2454 struct blob_attr *cur;
2455 int ret = 0, ttl = 0;
2456
2457 if (!nlm)
2458 return -1;
2459
2460 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2461 nla_put_string(nlm, IFLA_IFNAME, name);
2462
2463 if (link)
2464 nla_put_u32(nlm, IFLA_LINK, link);
2465
2466 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2467 if (!linkinfo) {
2468 ret = -ENOMEM;
2469 goto failure;
2470 }
2471
2472 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2473 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2474 if (!infodata) {
2475 ret = -ENOMEM;
2476 goto failure;
2477 }
2478
2479 if (link)
2480 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2481
2482 if ((cur = tb[TUNNEL_ATTR_TTL]))
2483 ttl = blobmsg_get_u32(cur);
2484
2485 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2486 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2487
2488 struct in6_addr in6buf;
2489 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2490 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2491 ret = -EINVAL;
2492 goto failure;
2493 }
2494 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2495 }
2496
2497 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2498 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2499 ret = -EINVAL;
2500 goto failure;
2501 }
2502 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2503 }
2504
2505 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2506 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2507 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2508
2509 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2510 blobmsg_data(cur), blobmsg_len(cur));
2511
2512 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2513 char *str = blobmsg_get_string(cur);
2514
2515 if (strcmp(str, "ignore")) {
2516 char *e;
2517 unsigned encap_limit = strtoul(str, &e, 0);
2518
2519 if (e == str || *e || encap_limit > 255) {
2520 ret = -EINVAL;
2521 goto failure;
2522 }
2523
2524 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2525 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2526 }
2527 }
2528
2529 #ifdef IFLA_IPTUN_FMR_MAX
2530 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2531 struct blob_attr *rcur;
2532 unsigned rrem, fmrcnt = 0;
2533 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2534
2535 if (!fmrs) {
2536 ret = -ENOMEM;
2537 goto failure;
2538 }
2539
2540 blobmsg_for_each_attr(rcur, cur, rrem) {
2541 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2542 struct in6_addr ip6prefix;
2543 struct in_addr ip4prefix;
2544 unsigned ip4len, ip6len, ealen, offset;
2545
2546 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2547 blobmsg_data(rcur), blobmsg_len(rcur));
2548
2549 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2550 !parse_ip_and_netmask(AF_INET6,
2551 blobmsg_data(tb_cur), &ip6prefix,
2552 &ip6len)) {
2553 ret = -EINVAL;
2554 goto failure;
2555 }
2556
2557 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2558 !parse_ip_and_netmask(AF_INET,
2559 blobmsg_data(tb_cur), &ip4prefix,
2560 &ip4len)) {
2561 ret = -EINVAL;
2562 goto failure;
2563 }
2564
2565 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2566 ret = -EINVAL;
2567 goto failure;
2568 }
2569 ealen = blobmsg_get_u32(tb_cur);
2570
2571 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2572 ret = -EINVAL;
2573 goto failure;
2574 }
2575 offset = blobmsg_get_u32(tb_cur);
2576
2577 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2578 if (!rule) {
2579 ret = -ENOMEM;
2580 goto failure;
2581 }
2582
2583 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2584 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2585 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2586 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2587 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2588 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2589
2590 nla_nest_end(nlm, rule);
2591 }
2592
2593 nla_nest_end(nlm, fmrs);
2594 }
2595 #endif
2596 if (tun_flags)
2597 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2598 }
2599
2600 nla_nest_end(nlm, infodata);
2601 nla_nest_end(nlm, linkinfo);
2602
2603 return system_rtnl_call(nlm);
2604
2605 failure:
2606 nlmsg_free(nlm);
2607 return ret;
2608 }
2609 #endif
2610
2611 #ifdef IFLA_IPTUN_MAX
2612 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2613 static int system_add_gre_tunnel(const char *name, const char *kind,
2614 const unsigned int link, struct blob_attr **tb, bool v6)
2615 {
2616 struct nl_msg *nlm;
2617 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2618 struct blob_attr *cur;
2619 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2620 uint16_t iflags = 0, oflags = 0;
2621 uint8_t tos = 0;
2622 int ret = 0, ttl = 0;
2623 unsigned encap_limit = 0;
2624
2625 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2626 if (!nlm)
2627 return -1;
2628
2629 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2630 nla_put_string(nlm, IFLA_IFNAME, name);
2631
2632 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2633 if (!linkinfo) {
2634 ret = -ENOMEM;
2635 goto failure;
2636 }
2637
2638 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2639 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2640 if (!infodata) {
2641 ret = -ENOMEM;
2642 goto failure;
2643 }
2644
2645 if (link)
2646 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2647
2648 if ((cur = tb[TUNNEL_ATTR_TTL]))
2649 ttl = blobmsg_get_u32(cur);
2650
2651 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2652 char *str = blobmsg_get_string(cur);
2653 if (strcmp(str, "inherit")) {
2654 unsigned uval;
2655
2656 if (!system_tos_aton(str, &uval)) {
2657 ret = -EINVAL;
2658 goto failure;
2659 }
2660
2661 if (v6)
2662 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2663 else
2664 tos = uval;
2665 } else {
2666 if (v6)
2667 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2668 else
2669 tos = 1;
2670 }
2671 }
2672
2673 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2674 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2675
2676 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2677 blobmsg_data(cur), blobmsg_len(cur));
2678
2679 if ((cur = tb_data[GRE_DATA_IKEY])) {
2680 if ((ikey = blobmsg_get_u32(cur)))
2681 iflags |= GRE_KEY;
2682 }
2683
2684 if ((cur = tb_data[GRE_DATA_OKEY])) {
2685 if ((okey = blobmsg_get_u32(cur)))
2686 oflags |= GRE_KEY;
2687 }
2688
2689 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2690 if (blobmsg_get_bool(cur))
2691 iflags |= GRE_CSUM;
2692 }
2693
2694 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2695 if (blobmsg_get_bool(cur))
2696 oflags |= GRE_CSUM;
2697 }
2698
2699 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2700 if (blobmsg_get_bool(cur))
2701 iflags |= GRE_SEQ;
2702 }
2703
2704 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2705 if (blobmsg_get_bool(cur))
2706 oflags |= GRE_SEQ;
2707 }
2708
2709 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2710 char *str = blobmsg_get_string(cur);
2711
2712 if (strcmp(str, "ignore")) {
2713 char *e;
2714
2715 encap_limit = strtoul(str, &e, 0);
2716
2717 if (e == str || *e || encap_limit > 255) {
2718 ret = -EINVAL;
2719 goto failure;
2720 }
2721
2722 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2723 }
2724 }
2725 }
2726
2727 if (v6) {
2728 struct in6_addr in6buf;
2729 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2730 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2731 ret = -EINVAL;
2732 goto failure;
2733 }
2734 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2735 }
2736
2737 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2738 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2739 ret = -EINVAL;
2740 goto failure;
2741 }
2742 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2743 }
2744
2745 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2746 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2747
2748 if (flowinfo)
2749 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2750
2751 if (flags6)
2752 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2753
2754 if (!ttl)
2755 ttl = 64;
2756 } else {
2757 struct in_addr inbuf;
2758 bool set_df = true;
2759
2760 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2761 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2762 ret = -EINVAL;
2763 goto failure;
2764 }
2765 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2766 }
2767
2768 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2769 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2770 ret = -EINVAL;
2771 goto failure;
2772 }
2773 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2774
2775 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2776 if (!okey) {
2777 okey = inbuf.s_addr;
2778 oflags |= GRE_KEY;
2779 }
2780
2781 if (!ikey) {
2782 ikey = inbuf.s_addr;
2783 iflags |= GRE_KEY;
2784 }
2785 }
2786 }
2787
2788 if ((cur = tb[TUNNEL_ATTR_DF]))
2789 set_df = blobmsg_get_bool(cur);
2790
2791 if (!set_df) {
2792 /* ttl != 0 and nopmtudisc are incompatible */
2793 if (ttl) {
2794 ret = -EINVAL;
2795 goto failure;
2796 }
2797 } else if (!ttl)
2798 ttl = 64;
2799
2800 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2801
2802 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2803 }
2804
2805 if (ttl)
2806 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2807
2808 if (oflags)
2809 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2810
2811 if (iflags)
2812 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2813
2814 if (okey)
2815 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2816
2817 if (ikey)
2818 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2819
2820 nla_nest_end(nlm, infodata);
2821 nla_nest_end(nlm, linkinfo);
2822
2823 return system_rtnl_call(nlm);
2824
2825 failure:
2826 nlmsg_free(nlm);
2827 return ret;
2828 }
2829 #endif
2830
2831 #ifdef IFLA_VTI_MAX
2832 static int system_add_vti_tunnel(const char *name, const char *kind,
2833 const unsigned int link, struct blob_attr **tb, bool v6)
2834 {
2835 struct nl_msg *nlm;
2836 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2837 struct blob_attr *cur;
2838 int ret = 0;
2839
2840 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2841 if (!nlm)
2842 return -1;
2843
2844 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2845 nla_put_string(nlm, IFLA_IFNAME, name);
2846
2847 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2848 if (!linkinfo) {
2849 ret = -ENOMEM;
2850 goto failure;
2851 }
2852
2853 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2854 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2855 if (!infodata) {
2856 ret = -ENOMEM;
2857 goto failure;
2858 }
2859
2860 if (link)
2861 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2862
2863 if (v6) {
2864 struct in6_addr in6buf;
2865 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2866 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2867 ret = -EINVAL;
2868 goto failure;
2869 }
2870 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2871 }
2872
2873 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2874 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2875 ret = -EINVAL;
2876 goto failure;
2877 }
2878 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2879 }
2880
2881 } else {
2882 struct in_addr inbuf;
2883
2884 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2885 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2886 ret = -EINVAL;
2887 goto failure;
2888 }
2889 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2890 }
2891
2892 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2893 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2894 ret = -EINVAL;
2895 goto failure;
2896 }
2897 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2898 }
2899
2900 }
2901
2902 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2903 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2904 uint32_t ikey = 0, okey = 0;
2905
2906 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2907 blobmsg_data(cur), blobmsg_len(cur));
2908
2909 if ((cur = tb_data[VTI_DATA_IKEY])) {
2910 if ((ikey = blobmsg_get_u32(cur)))
2911 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2912 }
2913
2914 if ((cur = tb_data[VTI_DATA_OKEY])) {
2915 if ((okey = blobmsg_get_u32(cur)))
2916 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2917 }
2918 }
2919
2920 nla_nest_end(nlm, infodata);
2921 nla_nest_end(nlm, linkinfo);
2922
2923 return system_rtnl_call(nlm);
2924
2925 failure:
2926 nlmsg_free(nlm);
2927 return ret;
2928 }
2929 #endif
2930
2931 #ifdef IFLA_XFRM_MAX
2932 static int system_add_xfrm_tunnel(const char *name, const char *kind,
2933 const unsigned int link, struct blob_attr **tb)
2934 {
2935 struct nl_msg *nlm;
2936 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2937 struct blob_attr *cur;
2938 int ret = 0;
2939
2940 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2941 if (!nlm)
2942 return -1;
2943
2944 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2945 nla_put_string(nlm, IFLA_IFNAME, name);
2946
2947 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2948 if (!linkinfo) {
2949 ret = -ENOMEM;
2950 goto failure;
2951 }
2952
2953 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2954 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2955 if (!infodata) {
2956 ret = -ENOMEM;
2957 goto failure;
2958 }
2959
2960 if (link)
2961 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
2962
2963 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2964 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
2965 uint32_t if_id = 0;
2966
2967 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
2968 blobmsg_data(cur), blobmsg_len(cur));
2969
2970 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
2971 if ((if_id = blobmsg_get_u32(cur)))
2972 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
2973 }
2974
2975 }
2976
2977 nla_nest_end(nlm, infodata);
2978 nla_nest_end(nlm, linkinfo);
2979
2980 return system_rtnl_call(nlm);
2981
2982 failure:
2983 nlmsg_free(nlm);
2984 return ret;
2985 }
2986 #endif
2987
2988 #ifdef IFLA_VXLAN_MAX
2989 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2990 {
2991 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2992 struct nl_msg *msg;
2993 struct nlattr *linkinfo, *data;
2994 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2995 struct blob_attr *cur;
2996 int ret = 0;
2997
2998 if ((cur = tb[TUNNEL_ATTR_DATA]))
2999 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3000 blobmsg_data(cur), blobmsg_len(cur));
3001 else
3002 return -EINVAL;
3003
3004 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3005
3006 if (!msg)
3007 return -1;
3008
3009 nlmsg_append(msg, &iim, sizeof(iim), 0);
3010
3011 nla_put_string(msg, IFLA_IFNAME, name);
3012
3013 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3014 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3015 if (!ea) {
3016 ret = -EINVAL;
3017 goto failure;
3018 }
3019
3020 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3021 }
3022
3023 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3024 uint32_t mtu = blobmsg_get_u32(cur);
3025 nla_put_u32(msg, IFLA_MTU, mtu);
3026 }
3027
3028 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3029 ret = -ENOMEM;
3030 goto failure;
3031 }
3032
3033 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3034
3035 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3036 ret = -ENOMEM;
3037 goto failure;
3038 }
3039
3040 if (link)
3041 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3042
3043 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3044 uint32_t id = blobmsg_get_u32(cur);
3045 if (id >= (1u << 24) - 1) {
3046 ret = -EINVAL;
3047 goto failure;
3048 }
3049
3050 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3051 }
3052
3053 if (v6) {
3054 struct in6_addr in6buf;
3055 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3056 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3057 ret = -EINVAL;
3058 goto failure;
3059 }
3060 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3061 }
3062
3063 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3064 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3065 ret = -EINVAL;
3066 goto failure;
3067 }
3068 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3069 }
3070 } else {
3071 struct in_addr inbuf;
3072
3073 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3074 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3075 ret = -EINVAL;
3076 goto failure;
3077 }
3078 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3079 }
3080
3081 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3082 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3083 ret = -EINVAL;
3084 goto failure;
3085 }
3086 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3087 }
3088 }
3089
3090 uint32_t port = 4789;
3091 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3092 port = blobmsg_get_u32(cur);
3093 if (port < 1 || port > 65535) {
3094 ret = -EINVAL;
3095 goto failure;
3096 }
3097 }
3098 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3099
3100 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
3101 bool rxcsum = blobmsg_get_bool(cur);
3102 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
3103 }
3104
3105 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
3106 bool txcsum = blobmsg_get_bool(cur);
3107 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
3108 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
3109 }
3110
3111 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3112 char *str = blobmsg_get_string(cur);
3113 unsigned tos = 1;
3114
3115 if (strcmp(str, "inherit")) {
3116 if (!system_tos_aton(str, &tos)) {
3117 ret = -EINVAL;
3118 goto failure;
3119 }
3120 }
3121
3122 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3123 }
3124
3125 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3126 uint32_t ttl = blobmsg_get_u32(cur);
3127 if (ttl < 1 || ttl > 255) {
3128 ret = -EINVAL;
3129 goto failure;
3130 }
3131
3132 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3133 }
3134
3135 nla_nest_end(msg, data);
3136 nla_nest_end(msg, linkinfo);
3137
3138 ret = system_rtnl_call(msg);
3139 if (ret)
3140 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3141
3142 return ret;
3143
3144 failure:
3145 nlmsg_free(msg);
3146 return ret;
3147 }
3148 #endif
3149
3150 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3151 {
3152 struct blob_attr *cur;
3153 int ret = 0;
3154
3155 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3156 return -1;
3157
3158 #ifdef SIOCADD6RD
3159 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3160 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3161 unsigned int mask;
3162 struct ip_tunnel_6rd p6;
3163
3164 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3165 blobmsg_data(cur), blobmsg_len(cur));
3166
3167 memset(&p6, 0, sizeof(p6));
3168
3169 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3170 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3171 &p6.prefix, &mask) || mask > 128) {
3172 ret = -EINVAL;
3173 goto failure;
3174 }
3175
3176 p6.prefixlen = mask;
3177 }
3178
3179 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3180 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3181 &p6.relay_prefix, &mask) || mask > 32) {
3182 ret = -EINVAL;
3183 goto failure;
3184 }
3185
3186 p6.relay_prefixlen = mask;
3187 }
3188
3189 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3190 ret = -1;
3191 goto failure;
3192 }
3193 }
3194 #endif
3195
3196 return ret;
3197
3198 failure:
3199 __system_del_ip_tunnel(name, tb);
3200 return ret;
3201 }
3202
3203 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3204 {
3205 struct blob_attr *cur;
3206 bool set_df = true;
3207 struct ip_tunnel_parm p = {
3208 .link = link,
3209 .iph = {
3210 .version = 4,
3211 .ihl = 5,
3212 .protocol = proto,
3213 }
3214 };
3215
3216 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3217 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3218 return -EINVAL;
3219
3220 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3221 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3222 return -EINVAL;
3223
3224 if ((cur = tb[TUNNEL_ATTR_DF]))
3225 set_df = blobmsg_get_bool(cur);
3226
3227 if ((cur = tb[TUNNEL_ATTR_TTL]))
3228 p.iph.ttl = blobmsg_get_u32(cur);
3229
3230 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3231 char *str = blobmsg_get_string(cur);
3232 if (strcmp(str, "inherit")) {
3233 unsigned uval;
3234
3235 if (!system_tos_aton(str, &uval))
3236 return -EINVAL;
3237
3238 p.iph.tos = uval;
3239 } else
3240 p.iph.tos = 1;
3241 }
3242
3243 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3244 /* ttl !=0 and nopmtudisc are incompatible */
3245 if (p.iph.ttl && p.iph.frag_off == 0)
3246 return -EINVAL;
3247
3248 strncpy(p.name, name, sizeof(p.name) - 1);
3249
3250 switch (p.iph.protocol) {
3251 case IPPROTO_IPIP:
3252 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3253 case IPPROTO_IPV6:
3254 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3255 default:
3256 break;
3257 }
3258 return -1;
3259 }
3260
3261 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3262 {
3263 struct blob_attr *cur;
3264 const char *str;
3265
3266 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3267 return -EINVAL;
3268 str = blobmsg_data(cur);
3269
3270 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3271 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3272 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3273 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3274 !strcmp(str, "xfrm"))
3275 return system_link_del(name);
3276 else
3277 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3278 }
3279
3280 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3281 {
3282 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3283
3284 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3285 blob_data(attr), blob_len(attr));
3286
3287 return __system_del_ip_tunnel(name, tb);
3288 }
3289
3290 int system_update_ipv6_mtu(struct device *dev, int mtu)
3291 {
3292 int ret = -1;
3293 char buf[64];
3294 int fd;
3295
3296 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3297 dev->ifname);
3298
3299 fd = open(buf, O_RDWR);
3300 if (fd < 0)
3301 return ret;
3302
3303 if (!mtu) {
3304 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3305 if (len < 0)
3306 goto out;
3307
3308 buf[len] = 0;
3309 ret = atoi(buf);
3310 } else {
3311 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3312 ret = mtu;
3313 }
3314
3315 out:
3316 close(fd);
3317 return ret;
3318 }
3319
3320 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3321 {
3322 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3323 struct blob_attr *cur;
3324 const char *str;
3325
3326 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3327 blob_data(attr), blob_len(attr));
3328
3329 __system_del_ip_tunnel(name, tb);
3330
3331 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3332 return -EINVAL;
3333 str = blobmsg_data(cur);
3334
3335 unsigned int ttl = 0;
3336 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3337 ttl = blobmsg_get_u32(cur);
3338 if (ttl > 255)
3339 return -EINVAL;
3340 }
3341
3342 unsigned int link = 0;
3343 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3344 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3345 if (!iface)
3346 return -EINVAL;
3347
3348 if (iface->l3_dev.dev)
3349 link = iface->l3_dev.dev->ifindex;
3350 }
3351
3352 if (!strcmp(str, "sit"))
3353 return system_add_sit_tunnel(name, link, tb);
3354 #ifdef IFLA_IPTUN_MAX
3355 else if (!strcmp(str, "ipip6")) {
3356 return system_add_ip6_tunnel(name, link, tb);
3357 } else if (!strcmp(str, "greip")) {
3358 return system_add_gre_tunnel(name, "gre", link, tb, false);
3359 } else if (!strcmp(str, "gretapip")) {
3360 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3361 } else if (!strcmp(str, "greip6")) {
3362 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3363 } else if (!strcmp(str, "gretapip6")) {
3364 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3365 #ifdef IFLA_VTI_MAX
3366 } else if (!strcmp(str, "vtiip")) {
3367 return system_add_vti_tunnel(name, "vti", link, tb, false);
3368 } else if (!strcmp(str, "vtiip6")) {
3369 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3370 #endif
3371 #ifdef IFLA_XFRM_MAX
3372 } else if (!strcmp(str, "xfrm")) {
3373 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3374 #endif
3375 #ifdef IFLA_VXLAN_MAX
3376 } else if(!strcmp(str, "vxlan")) {
3377 return system_add_vxlan(name, link, tb, false);
3378 } else if(!strcmp(str, "vxlan6")) {
3379 return system_add_vxlan(name, link, tb, true);
3380 #endif
3381 #endif
3382 } else if (!strcmp(str, "ipip")) {
3383 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3384 }
3385 else
3386 return -EINVAL;
3387
3388 return 0;
3389 }
OpenWrt Network interface configuration daemon