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system-linux: fix PATH_MAX undeclared compilation error
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19 #define _GNU_SOURCE
20
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/stat.h>
24 #include <sys/syscall.h>
25
26 #include <net/if.h>
27 #include <net/if_arp.h>
28
29 #include <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/ether.h>
32 #include <netinet/in.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #ifndef RTN_FAILED_POLICY
52 #define RTN_FAILED_POLICY 12
53 #endif
54
55 #ifndef IFA_F_NOPREFIXROUTE
56 #define IFA_F_NOPREFIXROUTE 0x200
57 #endif
58
59 #ifndef IFA_FLAGS
60 #define IFA_FLAGS (IFA_MULTICAST + 1)
61 #endif
62
63 #include <string.h>
64 #include <fcntl.h>
65 #include <glob.h>
66 #include <time.h>
67 #include <unistd.h>
68
69 #include <netlink/msg.h>
70 #include <netlink/attr.h>
71 #include <netlink/socket.h>
72 #include <libubox/uloop.h>
73
74 #include "netifd.h"
75 #include "device.h"
76 #include "system.h"
77
78 struct event_socket {
79 struct uloop_fd uloop;
80 struct nl_sock *sock;
81 int bufsize;
82 };
83
84 static int sock_ioctl = -1;
85 static struct nl_sock *sock_rtnl = NULL;
86
87 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
88 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
89 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
90 const unsigned int link, struct blob_attr **tb);
91 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
92
93 static char dev_buf[256];
94
95 static void
96 handler_nl_event(struct uloop_fd *u, unsigned int events)
97 {
98 struct event_socket *ev = container_of(u, struct event_socket, uloop);
99 int err;
100 socklen_t errlen = sizeof(err);
101
102 if (!u->error) {
103 nl_recvmsgs_default(ev->sock);
104 return;
105 }
106
107 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
108 goto abort;
109
110 switch(err) {
111 case ENOBUFS:
112 /* Increase rx buffer size on netlink socket */
113 ev->bufsize *= 2;
114 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
115 goto abort;
116
117 /* Request full dump since some info got dropped */
118 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
119 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
120 break;
121
122 default:
123 goto abort;
124 }
125 u->error = false;
126 return;
127
128 abort:
129 uloop_fd_delete(&ev->uloop);
130 return;
131 }
132
133 static struct nl_sock *
134 create_socket(int protocol, int groups)
135 {
136 struct nl_sock *sock;
137
138 sock = nl_socket_alloc();
139 if (!sock)
140 return NULL;
141
142 if (groups)
143 nl_join_groups(sock, groups);
144
145 if (nl_connect(sock, protocol)) {
146 nl_socket_free(sock);
147 return NULL;
148 }
149
150 return sock;
151 }
152
153 static bool
154 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
155 uloop_fd_handler cb, int flags)
156 {
157 ev->sock = create_socket(protocol, groups);
158 if (!ev->sock)
159 return false;
160
161 ev->uloop.fd = nl_socket_get_fd(ev->sock);
162 ev->uloop.cb = cb;
163 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
164 return false;
165
166 return true;
167 }
168
169 static bool
170 create_event_socket(struct event_socket *ev, int protocol,
171 int (*cb)(struct nl_msg *msg, void *arg))
172 {
173 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
174 return false;
175
176 /* Install the valid custom callback handler */
177 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
178
179 /* Disable sequence number checking on event sockets */
180 nl_socket_disable_seq_check(ev->sock);
181
182 /* Increase rx buffer size to 65K on event sockets */
183 ev->bufsize = 65535;
184 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
185 return false;
186
187 return true;
188 }
189
190 static bool
191 create_hotplug_event_socket(struct event_socket *ev, int protocol,
192 void (*cb)(struct uloop_fd *u, unsigned int events))
193 {
194 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
195 return false;
196
197 /* Increase rx buffer size to 65K on event sockets */
198 ev->bufsize = 65535;
199 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
200 return false;
201
202 return true;
203 }
204
205 static bool
206 system_rtn_aton(const char *src, unsigned int *dst)
207 {
208 char *e;
209 unsigned int n;
210
211 if (!strcmp(src, "local"))
212 n = RTN_LOCAL;
213 else if (!strcmp(src, "nat"))
214 n = RTN_NAT;
215 else if (!strcmp(src, "broadcast"))
216 n = RTN_BROADCAST;
217 else if (!strcmp(src, "anycast"))
218 n = RTN_ANYCAST;
219 else if (!strcmp(src, "multicast"))
220 n = RTN_MULTICAST;
221 else if (!strcmp(src, "prohibit"))
222 n = RTN_PROHIBIT;
223 else if (!strcmp(src, "unreachable"))
224 n = RTN_UNREACHABLE;
225 else if (!strcmp(src, "blackhole"))
226 n = RTN_BLACKHOLE;
227 else if (!strcmp(src, "xresolve"))
228 n = RTN_XRESOLVE;
229 else if (!strcmp(src, "unicast"))
230 n = RTN_UNICAST;
231 else if (!strcmp(src, "throw"))
232 n = RTN_THROW;
233 else if (!strcmp(src, "failed_policy"))
234 n = RTN_FAILED_POLICY;
235 else {
236 n = strtoul(src, &e, 0);
237 if (!e || *e || e == src || n > 255)
238 return false;
239 }
240
241 *dst = n;
242 return true;
243 }
244
245 static bool
246 system_tos_aton(const char *src, unsigned *dst)
247 {
248 char *e;
249
250 *dst = strtoul(src, &e, 16);
251 if (e == src || *e || *dst > 255)
252 return false;
253
254 return true;
255 }
256
257 int system_init(void)
258 {
259 static struct event_socket rtnl_event;
260 static struct event_socket hotplug_event;
261
262 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
263 system_fd_set_cloexec(sock_ioctl);
264
265 /* Prepare socket for routing / address control */
266 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
267 if (!sock_rtnl)
268 return -1;
269
270 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
271 return -1;
272
273 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
274 handle_hotplug_event))
275 return -1;
276
277 /* Receive network link events form kernel */
278 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
279
280 return 0;
281 }
282
283 static void system_set_sysctl(const char *path, const char *val)
284 {
285 int fd;
286
287 fd = open(path, O_WRONLY);
288 if (fd < 0)
289 return;
290
291 if (write(fd, val, strlen(val))) {}
292 close(fd);
293 }
294
295 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
296 {
297 snprintf(dev_buf, sizeof(dev_buf), path, device);
298 system_set_sysctl(dev_buf, val);
299 }
300
301 static void system_set_disable_ipv6(struct device *dev, const char *val)
302 {
303 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
304 }
305
306 static void system_set_rpfilter(struct device *dev, const char *val)
307 {
308 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
309 }
310
311 static void system_set_acceptlocal(struct device *dev, const char *val)
312 {
313 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
314 }
315
316 static void system_set_igmpversion(struct device *dev, const char *val)
317 {
318 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
319 }
320
321 static void system_set_mldversion(struct device *dev, const char *val)
322 {
323 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
324 }
325
326 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
327 {
328 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
329 }
330
331 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
332 {
333 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
334 }
335
336 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
337 {
338 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
339 }
340
341 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
342 {
343 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
344 }
345
346 static void system_set_neigh4locktime(struct device *dev, const char *val)
347 {
348 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
349 }
350
351 static void system_set_dadtransmits(struct device *dev, const char *val)
352 {
353 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
354 }
355
356 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
357 {
358 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
359 }
360
361 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
362 {
363 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
364 }
365
366 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
367 {
368 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
369 }
370
371 static void system_bridge_set_isolated(struct device *dev, const char *val)
372 {
373 system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val);
374 }
375
376 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
377 {
378 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
379 "/sys/class/net/%s/brport/multicast_router",
380 dev->ifname, val);
381 }
382
383 static void system_bridge_set_robustness(struct device *dev, const char *val)
384 {
385 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
386 dev->ifname, val);
387 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
388 dev->ifname, val);
389 }
390
391 static void system_bridge_set_query_interval(struct device *dev, const char *val)
392 {
393 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
394 dev->ifname, val);
395 }
396
397 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
398 {
399 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
400 dev->ifname, val);
401 }
402
403 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
404 {
405 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
406 dev->ifname, val);
407 }
408
409 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
410 {
411 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
412 dev->ifname, val);
413 }
414
415 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
416 {
417 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
418 dev->ifname, val);
419 }
420
421 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
422 {
423 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
424 dev->ifname, val);
425 }
426
427 static void system_bridge_set_stp_state(struct device *dev, const char *val)
428 {
429 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/stp_state", dev->ifname, val);
430 }
431
432 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
433 {
434 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/forward_delay", dev->ifname, val);
435 }
436
437 static void system_bridge_set_priority(struct device *dev, const char *val)
438 {
439 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/priority", dev->ifname, val);
440 }
441
442 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
443 {
444 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/ageing_time", dev->ifname, val);
445 }
446
447 static void system_bridge_set_hello_time(struct device *dev, const char *val)
448 {
449 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hello_time", dev->ifname, val);
450 }
451
452 static void system_bridge_set_max_age(struct device *dev, const char *val)
453 {
454 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/max_age", dev->ifname, val);
455 }
456
457 static void system_bridge_set_learning(struct device *dev, const char *val)
458 {
459 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
460 }
461
462 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
463 {
464 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
465 }
466
467 static void system_set_sendredirects(struct device *dev, const char *val)
468 {
469 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
470 }
471
472 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
473 {
474 int fd = -1, ret = -1;
475
476 fd = open(path, O_RDONLY);
477 if (fd < 0)
478 goto out;
479
480 ssize_t len = read(fd, buf, buf_sz - 1);
481 if (len < 0)
482 goto out;
483
484 ret = buf[len] = 0;
485
486 out:
487 if (fd >= 0)
488 close(fd);
489
490 return ret;
491 }
492
493 static int
494 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
495 {
496 snprintf(dev_buf, sizeof(dev_buf), path, device);
497 return system_get_sysctl(dev_buf, buf, buf_sz);
498 }
499
500 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
501 {
502 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
503 dev->ifname, buf, buf_sz);
504 }
505
506 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
507 {
508 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
509 dev->ifname, buf, buf_sz);
510 }
511
512 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
513 {
514 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
515 dev->ifname, buf, buf_sz);
516 }
517
518 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
519 {
520 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
521 dev->ifname, buf, buf_sz);
522 }
523
524 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
525 {
526 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
527 dev->ifname, buf, buf_sz);
528 }
529
530 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
531 {
532 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
533 dev->ifname, buf, buf_sz);
534 }
535
536 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
537 {
538 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
539 dev->ifname, buf, buf_sz);
540 }
541
542 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
543 {
544 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
545 dev->ifname, buf, buf_sz);
546 }
547
548 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
549 {
550 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
551 dev->ifname, buf, buf_sz);
552 }
553
554 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
555 {
556 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
557 dev->ifname, buf, buf_sz);
558 }
559
560 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
561 {
562 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
563 dev->ifname, buf, buf_sz);
564 }
565
566 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
567 {
568 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
569 dev->ifname, buf, buf_sz);
570 }
571
572 /* Evaluate netlink messages */
573 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
574 {
575 struct nlmsghdr *nh = nlmsg_hdr(msg);
576 struct nlattr *nla[__IFLA_MAX];
577 int link_state = 0;
578 char buf[10];
579
580 if (nh->nlmsg_type != RTM_NEWLINK)
581 goto out;
582
583 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
584 if (!nla[IFLA_IFNAME])
585 goto out;
586
587 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
588 if (!dev)
589 goto out;
590
591 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
592 link_state = strtoul(buf, NULL, 0);
593
594 device_set_link(dev, link_state ? true : false);
595
596 out:
597 return 0;
598 }
599
600 static void
601 handle_hotplug_msg(char *data, int size)
602 {
603 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
604 char *cur, *end, *sep;
605 struct device *dev;
606 int skip;
607 bool add, move = false;
608
609 if (!strncmp(data, "add@", 4))
610 add = true;
611 else if (!strncmp(data, "remove@", 7))
612 add = false;
613 else if (!strncmp(data, "move@", 5)) {
614 add = true;
615 move = true;
616 }
617 else
618 return;
619
620 skip = strlen(data) + 1;
621 end = data + size;
622
623 for (cur = data + skip; cur < end; cur += skip) {
624 skip = strlen(cur) + 1;
625
626 sep = strchr(cur, '=');
627 if (!sep)
628 continue;
629
630 *sep = 0;
631 if (!strcmp(cur, "INTERFACE"))
632 interface = sep + 1;
633 else if (!strcmp(cur, "SUBSYSTEM")) {
634 subsystem = sep + 1;
635 if (strcmp(subsystem, "net") != 0)
636 return;
637 } else if (!strcmp(cur, "DEVPATH_OLD")) {
638 interface_old = strrchr(sep + 1, '/');
639 if (interface_old)
640 interface_old++;
641 }
642 }
643
644 if (subsystem && interface) {
645 if (move && interface_old)
646 goto move;
647 else
648 goto found;
649 }
650
651 return;
652
653 move:
654 dev = device_find(interface_old);
655 if (!dev)
656 goto found;
657
658 if (dev->type != &simple_device_type)
659 goto found;
660
661 device_set_present(dev, false);
662
663 found:
664 dev = device_find(interface);
665 if (!dev)
666 return;
667
668 if (dev->type != &simple_device_type)
669 return;
670
671 if (add && system_if_force_external(dev->ifname))
672 return;
673
674 device_set_present(dev, add);
675 }
676
677 static void
678 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
679 {
680 struct event_socket *ev = container_of(u, struct event_socket, uloop);
681 struct sockaddr_nl nla;
682 unsigned char *buf = NULL;
683 int size;
684 int err;
685 socklen_t errlen = sizeof(err);
686
687 if (!u->error) {
688 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
689 if (nla.nl_pid == 0)
690 handle_hotplug_msg((char *) buf, size);
691
692 free(buf);
693 }
694 return;
695 }
696
697 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
698 goto abort;
699
700 switch(err) {
701 case ENOBUFS:
702 /* Increase rx buffer size on netlink socket */
703 ev->bufsize *= 2;
704 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
705 goto abort;
706 break;
707
708 default:
709 goto abort;
710 }
711 u->error = false;
712 return;
713
714 abort:
715 uloop_fd_delete(&ev->uloop);
716 return;
717 }
718
719 static int system_rtnl_call(struct nl_msg *msg)
720 {
721 int ret;
722
723 ret = nl_send_auto_complete(sock_rtnl, msg);
724 nlmsg_free(msg);
725
726 if (ret < 0)
727 return ret;
728
729 return nl_wait_for_ack(sock_rtnl);
730 }
731
732 int system_bridge_delbr(struct device *bridge)
733 {
734 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
735 }
736
737 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
738 {
739 struct ifreq ifr;
740
741 memset(&ifr, 0, sizeof(ifr));
742 if (dev)
743 ifr.ifr_ifindex = dev->ifindex;
744 else
745 ifr.ifr_data = data;
746 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
747 return ioctl(sock_ioctl, cmd, &ifr);
748 }
749
750 static bool system_is_bridge(const char *name, char *buf, int buflen)
751 {
752 struct stat st;
753
754 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
755 if (stat(buf, &st) < 0)
756 return false;
757
758 return true;
759 }
760
761 static char *system_get_bridge(const char *name, char *buf, int buflen)
762 {
763 char *path;
764 ssize_t len = -1;
765 glob_t gl;
766
767 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
768 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
769 return NULL;
770
771 if (gl.gl_pathc > 0)
772 len = readlink(gl.gl_pathv[0], buf, buflen);
773
774 globfree(&gl);
775
776 if (len < 0)
777 return NULL;
778
779 buf[len] = 0;
780 path = strrchr(buf, '/');
781 if (!path)
782 return NULL;
783
784 return path + 1;
785 }
786
787 static void
788 system_bridge_set_wireless(struct device *bridge, struct device *dev)
789 {
790 bool mcast_to_ucast = dev->wireless_ap;
791 bool hairpin = true;
792
793 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
794 !bridge->settings.multicast_to_unicast)
795 mcast_to_ucast = false;
796
797 if (!mcast_to_ucast || dev->wireless_isolate)
798 hairpin = false;
799
800 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
801 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
802 }
803
804 int system_bridge_addif(struct device *bridge, struct device *dev)
805 {
806 char buf[64];
807 char *oldbr;
808 int ret = 0;
809
810 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
811 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
812 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
813
814 if (dev->wireless)
815 system_bridge_set_wireless(bridge, dev);
816
817 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
818 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
819 system_bridge_set_multicast_router(dev, buf, false);
820 }
821
822 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
823 dev->settings.multicast_fast_leave)
824 system_bridge_set_multicast_fast_leave(dev, "1");
825
826 if (dev->settings.flags & DEV_OPT_LEARNING &&
827 !dev->settings.learning)
828 system_bridge_set_learning(dev, "0");
829
830 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
831 !dev->settings.unicast_flood)
832 system_bridge_set_unicast_flood(dev, "0");
833
834 if (dev->settings.flags & DEV_OPT_ISOLATE &&
835 dev->settings.isolate)
836 system_bridge_set_isolated(dev, "1");
837
838 return ret;
839 }
840
841 int system_bridge_delif(struct device *bridge, struct device *dev)
842 {
843 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
844 }
845
846 int system_if_resolve(struct device *dev)
847 {
848 struct ifreq ifr;
849 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
850 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
851 return ifr.ifr_ifindex;
852 else
853 return 0;
854 }
855
856 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
857 {
858 struct ifreq ifr;
859
860 memset(&ifr, 0, sizeof(ifr));
861 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
862 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
863 return -1;
864
865 ifr.ifr_flags |= add;
866 ifr.ifr_flags &= ~rem;
867 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
868 }
869
870 struct clear_data {
871 struct nl_msg *msg;
872 struct device *dev;
873 int type;
874 int size;
875 int af;
876 };
877
878
879 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
880 {
881 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
882
883 return ifa->ifa_index == ifindex;
884 }
885
886 static bool check_route(struct nlmsghdr *hdr, int ifindex)
887 {
888 struct rtmsg *r = NLMSG_DATA(hdr);
889 struct nlattr *tb[__RTA_MAX];
890
891 if (r->rtm_protocol == RTPROT_KERNEL &&
892 r->rtm_family == AF_INET6)
893 return false;
894
895 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
896 if (!tb[RTA_OIF])
897 return false;
898
899 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
900 }
901
902 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
903 {
904 return true;
905 }
906
907 static int cb_clear_event(struct nl_msg *msg, void *arg)
908 {
909 struct clear_data *clr = arg;
910 struct nlmsghdr *hdr = nlmsg_hdr(msg);
911 bool (*cb)(struct nlmsghdr *, int ifindex);
912 int type, ret;
913
914 switch(clr->type) {
915 case RTM_GETADDR:
916 type = RTM_DELADDR;
917 if (hdr->nlmsg_type != RTM_NEWADDR)
918 return NL_SKIP;
919
920 cb = check_ifaddr;
921 break;
922 case RTM_GETROUTE:
923 type = RTM_DELROUTE;
924 if (hdr->nlmsg_type != RTM_NEWROUTE)
925 return NL_SKIP;
926
927 cb = check_route;
928 break;
929 case RTM_GETRULE:
930 type = RTM_DELRULE;
931 if (hdr->nlmsg_type != RTM_NEWRULE)
932 return NL_SKIP;
933
934 cb = check_rule;
935 break;
936 default:
937 return NL_SKIP;
938 }
939
940 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
941 return NL_SKIP;
942
943 if (type == RTM_DELRULE)
944 D(SYSTEM, "Remove a rule\n");
945 else
946 D(SYSTEM, "Remove %s from device %s\n",
947 type == RTM_DELADDR ? "an address" : "a route",
948 clr->dev->ifname);
949
950 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
951 hdr = nlmsg_hdr(clr->msg);
952 hdr->nlmsg_type = type;
953 hdr->nlmsg_flags = NLM_F_REQUEST;
954
955 nl_socket_disable_auto_ack(sock_rtnl);
956 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
957 if (ret < 0) {
958 if (type == RTM_DELRULE)
959 D(SYSTEM, "Error deleting a rule: %d\n", ret);
960 else
961 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
962 type == RTM_DELADDR ? "an address" : "a route",
963 clr->dev->ifname, ret);
964 }
965
966 nl_socket_enable_auto_ack(sock_rtnl);
967
968 return NL_SKIP;
969 }
970
971 static int
972 cb_finish_event(struct nl_msg *msg, void *arg)
973 {
974 int *pending = arg;
975 *pending = 0;
976 return NL_STOP;
977 }
978
979 static int
980 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
981 {
982 int *pending = arg;
983 *pending = err->error;
984 return NL_STOP;
985 }
986
987 static void
988 system_if_clear_entries(struct device *dev, int type, int af)
989 {
990 struct clear_data clr;
991 struct nl_cb *cb;
992 struct rtmsg rtm = {
993 .rtm_family = af,
994 .rtm_flags = RTM_F_CLONED,
995 };
996 int flags = NLM_F_DUMP;
997 int pending = 1;
998
999 clr.af = af;
1000 clr.dev = dev;
1001 clr.type = type;
1002 switch (type) {
1003 case RTM_GETADDR:
1004 case RTM_GETRULE:
1005 clr.size = sizeof(struct rtgenmsg);
1006 break;
1007 case RTM_GETROUTE:
1008 clr.size = sizeof(struct rtmsg);
1009 break;
1010 default:
1011 return;
1012 }
1013
1014 cb = nl_cb_alloc(NL_CB_DEFAULT);
1015 if (!cb)
1016 return;
1017
1018 clr.msg = nlmsg_alloc_simple(type, flags);
1019 if (!clr.msg)
1020 goto out;
1021
1022 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1023 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1024 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1025 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1026
1027 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1028 goto free;
1029
1030 while (pending > 0)
1031 nl_recvmsgs(sock_rtnl, cb);
1032
1033 free:
1034 nlmsg_free(clr.msg);
1035 out:
1036 nl_cb_put(cb);
1037 }
1038
1039 /*
1040 * Clear bridge (membership) state and bring down device
1041 */
1042 void system_if_clear_state(struct device *dev)
1043 {
1044 static char buf[256];
1045 char *bridge;
1046 device_set_ifindex(dev, system_if_resolve(dev));
1047
1048 if (dev->external || !dev->ifindex)
1049 return;
1050
1051 system_if_flags(dev->ifname, 0, IFF_UP);
1052
1053 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
1054 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1055 system_bridge_delbr(dev);
1056 return;
1057 }
1058
1059 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1060 if (bridge) {
1061 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1062 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1063 }
1064
1065 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1066 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1067 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1068 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1069 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1070 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1071 system_set_disable_ipv6(dev, "0");
1072 }
1073
1074 static inline unsigned long
1075 sec_to_jiffies(int val)
1076 {
1077 return (unsigned long) val * 100;
1078 }
1079
1080 static void system_bridge_conf_multicast_deps(struct device *bridge,
1081 struct bridge_config *cfg,
1082 char *buf,
1083 int buf_len)
1084 {
1085 int val;
1086
1087 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1088 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1089 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1090 val = cfg->robustness * cfg->query_interval +
1091 cfg->query_response_interval;
1092
1093 snprintf(buf, buf_len, "%i", val);
1094 system_bridge_set_membership_interval(bridge, buf);
1095
1096 val = cfg->robustness * cfg->query_interval +
1097 cfg->query_response_interval / 2;
1098
1099 snprintf(buf, buf_len, "%i", val);
1100 system_bridge_set_other_querier_timeout(bridge, buf);
1101 }
1102
1103 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1104 val = cfg->query_interval / 4;
1105
1106 snprintf(buf, buf_len, "%i", val);
1107 system_bridge_set_startup_query_interval(bridge, buf);
1108 }
1109 }
1110
1111 static void system_bridge_conf_multicast(struct device *bridge,
1112 struct bridge_config *cfg,
1113 char *buf,
1114 int buf_len)
1115 {
1116 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1117 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1118
1119 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1120 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1121
1122 snprintf(buf, buf_len, "%i", cfg->hash_max);
1123 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1124 bridge->ifname, buf);
1125
1126 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1127 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1128 system_bridge_set_multicast_router(bridge, buf, true);
1129 }
1130
1131 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1132 snprintf(buf, buf_len, "%i", cfg->robustness);
1133 system_bridge_set_robustness(bridge, buf);
1134 }
1135
1136 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1137 snprintf(buf, buf_len, "%i", cfg->query_interval);
1138 system_bridge_set_query_interval(bridge, buf);
1139 }
1140
1141 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1142 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1143 system_bridge_set_query_response_interval(bridge, buf);
1144 }
1145
1146 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1147 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1148 system_bridge_set_last_member_interval(bridge, buf);
1149 }
1150
1151 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1152 }
1153
1154 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1155 {
1156 char buf[64];
1157
1158 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1159 return -1;
1160
1161 system_bridge_set_stp_state(bridge, cfg->stp ? "1" : "0");
1162
1163 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1164 system_bridge_set_forward_delay(bridge, buf);
1165
1166 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1167
1168 snprintf(buf, sizeof(buf), "%d", cfg->priority);
1169 system_bridge_set_priority(bridge, buf);
1170
1171 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1172 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1173 system_bridge_set_ageing_time(bridge, buf);
1174 }
1175
1176 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1177 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1178 system_bridge_set_hello_time(bridge, buf);
1179 }
1180
1181 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1182 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1183 system_bridge_set_max_age(bridge, buf);
1184 }
1185
1186 return 0;
1187 }
1188
1189 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1190 {
1191 struct nl_msg *msg;
1192 struct nlattr *linkinfo, *data;
1193 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1194 int i, rv;
1195 static const struct {
1196 const char *name;
1197 enum macvlan_mode val;
1198 } modes[] = {
1199 { "private", MACVLAN_MODE_PRIVATE },
1200 { "vepa", MACVLAN_MODE_VEPA },
1201 { "bridge", MACVLAN_MODE_BRIDGE },
1202 { "passthru", MACVLAN_MODE_PASSTHRU },
1203 };
1204
1205 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1206
1207 if (!msg)
1208 return -1;
1209
1210 nlmsg_append(msg, &iim, sizeof(iim), 0);
1211
1212 if (cfg->flags & MACVLAN_OPT_MACADDR)
1213 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1214 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1215 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1216
1217 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1218 goto nla_put_failure;
1219
1220 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1221
1222 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1223 goto nla_put_failure;
1224
1225 if (cfg->mode) {
1226 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1227 if (strcmp(cfg->mode, modes[i].name) != 0)
1228 continue;
1229
1230 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1231 break;
1232 }
1233 }
1234
1235 nla_nest_end(msg, data);
1236 nla_nest_end(msg, linkinfo);
1237
1238 rv = system_rtnl_call(msg);
1239 if (rv)
1240 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1241
1242 return rv;
1243
1244 nla_put_failure:
1245 nlmsg_free(msg);
1246 return -ENOMEM;
1247 }
1248
1249 int system_link_netns_move(const char *ifname, int netns_fd)
1250 {
1251 struct nl_msg *msg;
1252 struct ifinfomsg iim = {
1253 .ifi_family = AF_UNSPEC,
1254 .ifi_index = 0,
1255 };
1256
1257 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1258
1259 if (!msg)
1260 return -1;
1261
1262 nlmsg_append(msg, &iim, sizeof(iim), 0);
1263 nla_put_string(msg, IFLA_IFNAME, ifname);
1264 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1265 return system_rtnl_call(msg);
1266 }
1267
1268 static int system_link_del(const char *ifname)
1269 {
1270 struct nl_msg *msg;
1271 struct ifinfomsg iim = {
1272 .ifi_family = AF_UNSPEC,
1273 .ifi_index = 0,
1274 };
1275
1276 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1277
1278 if (!msg)
1279 return -1;
1280
1281 nlmsg_append(msg, &iim, sizeof(iim), 0);
1282 nla_put_string(msg, IFLA_IFNAME, ifname);
1283 return system_rtnl_call(msg);
1284 }
1285
1286 int system_macvlan_del(struct device *macvlan)
1287 {
1288 return system_link_del(macvlan->ifname);
1289 }
1290
1291 int system_netns_open(const pid_t target_ns)
1292 {
1293 char pid_net_path[PATH_MAX];
1294
1295 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1296
1297 return open(pid_net_path, O_RDONLY);
1298 }
1299
1300 int system_netns_set(int netns_fd)
1301 {
1302 return setns(netns_fd, CLONE_NEWNET);
1303 }
1304
1305 int system_veth_add(struct device *veth, struct veth_config *cfg)
1306 {
1307 struct nl_msg *msg;
1308 struct ifinfomsg empty_iim = {};
1309 struct nlattr *linkinfo, *data, *veth_info;
1310 int rv;
1311
1312 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1313
1314 if (!msg)
1315 return -1;
1316
1317 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1318
1319 if (cfg->flags & VETH_OPT_MACADDR)
1320 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1321 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1322
1323 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1324 goto nla_put_failure;
1325
1326 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1327
1328 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1329 goto nla_put_failure;
1330
1331 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1332 goto nla_put_failure;
1333
1334 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1335
1336 if (cfg->flags & VETH_OPT_PEER_NAME)
1337 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1338 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1339 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1340
1341 nla_nest_end(msg, veth_info);
1342 nla_nest_end(msg, data);
1343 nla_nest_end(msg, linkinfo);
1344
1345 rv = system_rtnl_call(msg);
1346 if (rv) {
1347 if (cfg->flags & VETH_OPT_PEER_NAME)
1348 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1349 else
1350 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1351 }
1352
1353 return rv;
1354
1355 nla_put_failure:
1356 nlmsg_free(msg);
1357 return -ENOMEM;
1358 }
1359
1360 int system_veth_del(struct device *veth)
1361 {
1362 return system_link_del(veth->ifname);
1363 }
1364
1365 static int system_vlan(struct device *dev, int id)
1366 {
1367 struct vlan_ioctl_args ifr = {
1368 .cmd = SET_VLAN_NAME_TYPE_CMD,
1369 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1370 };
1371
1372 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1373 return -1;
1374
1375 if (id < 0) {
1376 ifr.cmd = DEL_VLAN_CMD;
1377 ifr.u.VID = 0;
1378 } else {
1379 ifr.cmd = ADD_VLAN_CMD;
1380 ifr.u.VID = id;
1381 }
1382 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1383 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1384 }
1385
1386 int system_vlan_add(struct device *dev, int id)
1387 {
1388 return system_vlan(dev, id);
1389 }
1390
1391 int system_vlan_del(struct device *dev)
1392 {
1393 return system_vlan(dev, -1);
1394 }
1395
1396 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1397 {
1398 struct nl_msg *msg;
1399 struct nlattr *linkinfo, *data;
1400 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1401 int rv;
1402
1403 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1404
1405 if (!msg)
1406 return -1;
1407
1408 nlmsg_append(msg, &iim, sizeof(iim), 0);
1409 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1410 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1411
1412 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1413 goto nla_put_failure;
1414
1415 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1416
1417 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1418 goto nla_put_failure;
1419
1420 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1421
1422 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1423 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1424 #else
1425 if(cfg->proto == VLAN_PROTO_8021AD)
1426 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);
1427 #endif
1428
1429 nla_nest_end(msg, data);
1430 nla_nest_end(msg, linkinfo);
1431
1432 rv = system_rtnl_call(msg);
1433 if (rv)
1434 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1435
1436 return rv;
1437
1438 nla_put_failure:
1439 nlmsg_free(msg);
1440 return -ENOMEM;
1441 }
1442
1443 int system_vlandev_del(struct device *vlandev)
1444 {
1445 return system_link_del(vlandev->ifname);
1446 }
1447
1448 void
1449 system_if_get_settings(struct device *dev, struct device_settings *s)
1450 {
1451 struct ifreq ifr;
1452 char buf[10];
1453
1454 memset(&ifr, 0, sizeof(ifr));
1455 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1456
1457 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1458 s->mtu = ifr.ifr_mtu;
1459 s->flags |= DEV_OPT_MTU;
1460 }
1461
1462 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1463 if (s->mtu6 > 0)
1464 s->flags |= DEV_OPT_MTU6;
1465
1466 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1467 s->txqueuelen = ifr.ifr_qlen;
1468 s->flags |= DEV_OPT_TXQUEUELEN;
1469 }
1470
1471 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1472 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1473 s->flags |= DEV_OPT_MACADDR;
1474 }
1475
1476 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1477 s->ipv6 = !strtoul(buf, NULL, 0);
1478 s->flags |= DEV_OPT_IPV6;
1479 }
1480
1481 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1482 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1483 s->flags |= DEV_OPT_PROMISC;
1484
1485 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1486 s->flags |= DEV_OPT_MULTICAST;
1487 }
1488
1489 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1490 s->rpfilter = strtoul(buf, NULL, 0);
1491 s->flags |= DEV_OPT_RPFILTER;
1492 }
1493
1494 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1495 s->acceptlocal = strtoul(buf, NULL, 0);
1496 s->flags |= DEV_OPT_ACCEPTLOCAL;
1497 }
1498
1499 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1500 s->igmpversion = strtoul(buf, NULL, 0);
1501 s->flags |= DEV_OPT_IGMPVERSION;
1502 }
1503
1504 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1505 s->mldversion = strtoul(buf, NULL, 0);
1506 s->flags |= DEV_OPT_MLDVERSION;
1507 }
1508
1509 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1510 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1511 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1512 }
1513
1514 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1515 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1516 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1517 }
1518
1519 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1520 s->neigh4locktime = strtol(buf, NULL, 0);
1521 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1522 }
1523
1524 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1525 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1526 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1527 }
1528
1529 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1530 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1531 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1532 }
1533
1534 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1535 s->dadtransmits = strtoul(buf, NULL, 0);
1536 s->flags |= DEV_OPT_DADTRANSMITS;
1537 }
1538
1539 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1540 s->sendredirects = strtoul(buf, NULL, 0);
1541 s->flags |= DEV_OPT_SENDREDIRECTS;
1542 }
1543 }
1544
1545 void
1546 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1547 {
1548 struct ifreq ifr;
1549 char buf[12];
1550
1551 memset(&ifr, 0, sizeof(ifr));
1552 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1553 if (s->flags & DEV_OPT_MTU & apply_mask) {
1554 ifr.ifr_mtu = s->mtu;
1555 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1556 s->flags &= ~DEV_OPT_MTU;
1557 }
1558 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1559 system_update_ipv6_mtu(dev, s->mtu6);
1560 }
1561 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1562 ifr.ifr_qlen = s->txqueuelen;
1563 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1564 s->flags &= ~DEV_OPT_TXQUEUELEN;
1565 }
1566 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1567 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1568 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1569 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1570 s->flags &= ~DEV_OPT_MACADDR;
1571 }
1572 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1573 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1574 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1575 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1576 !s->promisc ? IFF_PROMISC : 0) < 0)
1577 s->flags &= ~DEV_OPT_PROMISC;
1578 }
1579 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1580 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1581 system_set_rpfilter(dev, buf);
1582 }
1583 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1584 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1585 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1586 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1587 system_set_igmpversion(dev, buf);
1588 }
1589 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1590 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1591 system_set_mldversion(dev, buf);
1592 }
1593 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1594 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1595 system_set_neigh4reachabletime(dev, buf);
1596 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1597 system_set_neigh6reachabletime(dev, buf);
1598 }
1599 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1600 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1601 system_set_neigh4locktime(dev, buf);
1602 }
1603 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1604 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1605 system_set_neigh4gcstaletime(dev, buf);
1606 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1607 system_set_neigh6gcstaletime(dev, buf);
1608 }
1609 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1610 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1611 system_set_dadtransmits(dev, buf);
1612 }
1613 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1614 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1615 !s->multicast ? IFF_MULTICAST : 0) < 0)
1616 s->flags &= ~DEV_OPT_MULTICAST;
1617 }
1618 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1619 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1620 }
1621
1622 int system_if_up(struct device *dev)
1623 {
1624 system_if_get_settings(dev, &dev->orig_settings);
1625 /* Only keep orig settings based on what needs to be set */
1626 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1627 dev->orig_settings.flags &= dev->settings.flags;
1628 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1629 return system_if_flags(dev->ifname, IFF_UP, 0);
1630 }
1631
1632 int system_if_down(struct device *dev)
1633 {
1634 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1635 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1636 return ret;
1637 }
1638
1639 struct if_check_data {
1640 struct device *dev;
1641 int pending;
1642 int ret;
1643 };
1644
1645 #ifndef IFF_LOWER_UP
1646 #define IFF_LOWER_UP 0x10000
1647 #endif
1648
1649 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1650 {
1651 struct nlmsghdr *nh = nlmsg_hdr(msg);
1652 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1653 struct if_check_data *chk = (struct if_check_data *)arg;
1654
1655 if (nh->nlmsg_type != RTM_NEWLINK)
1656 return NL_SKIP;
1657
1658 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1659 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1660
1661 return NL_OK;
1662 }
1663
1664 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1665 {
1666 struct if_check_data *chk = (struct if_check_data *)arg;
1667 chk->pending = 0;
1668 return NL_STOP;
1669 }
1670
1671 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1672 {
1673 struct if_check_data *chk = (struct if_check_data *)arg;
1674
1675 device_set_present(chk->dev, false);
1676 device_set_link(chk->dev, false);
1677 chk->pending = err->error;
1678
1679 return NL_STOP;
1680 }
1681
1682 int system_if_check(struct device *dev)
1683 {
1684 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1685 struct nl_msg *msg;
1686 struct ifinfomsg ifi = {
1687 .ifi_family = AF_UNSPEC,
1688 .ifi_index = 0,
1689 };
1690 struct if_check_data chk = {
1691 .dev = dev,
1692 .pending = 1,
1693 };
1694 int ret = 1;
1695
1696 if (!cb)
1697 return ret;
1698
1699 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1700 if (!msg)
1701 goto out;
1702
1703 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1704 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1705 goto free;
1706
1707 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1708 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1709 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1710
1711 ret = nl_send_auto_complete(sock_rtnl, msg);
1712 if (ret < 0)
1713 goto free;
1714
1715 while (chk.pending > 0)
1716 nl_recvmsgs(sock_rtnl, cb);
1717
1718 ret = chk.pending;
1719
1720 free:
1721 nlmsg_free(msg);
1722 out:
1723 nl_cb_put(cb);
1724 return ret;
1725 }
1726
1727 struct device *
1728 system_if_get_parent(struct device *dev)
1729 {
1730 char buf[64], *devname;
1731 int ifindex, iflink, len;
1732 FILE *f;
1733
1734 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1735 f = fopen(buf, "r");
1736 if (!f)
1737 return NULL;
1738
1739 len = fread(buf, 1, sizeof(buf) - 1, f);
1740 fclose(f);
1741
1742 if (len <= 0)
1743 return NULL;
1744
1745 buf[len] = 0;
1746 iflink = strtoul(buf, NULL, 0);
1747 ifindex = system_if_resolve(dev);
1748 if (!iflink || iflink == ifindex)
1749 return NULL;
1750
1751 devname = if_indextoname(iflink, buf);
1752 if (!devname)
1753 return NULL;
1754
1755 return device_get(devname, true);
1756 }
1757
1758 static bool
1759 read_string_file(int dir_fd, const char *file, char *buf, int len)
1760 {
1761 bool ret = false;
1762 char *c;
1763 int fd;
1764
1765 fd = openat(dir_fd, file, O_RDONLY);
1766 if (fd < 0)
1767 return false;
1768
1769 retry:
1770 len = read(fd, buf, len - 1);
1771 if (len < 0) {
1772 if (errno == EINTR)
1773 goto retry;
1774 } else if (len > 0) {
1775 buf[len] = 0;
1776
1777 c = strchr(buf, '\n');
1778 if (c)
1779 *c = 0;
1780
1781 ret = true;
1782 }
1783
1784 close(fd);
1785
1786 return ret;
1787 }
1788
1789 static bool
1790 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1791 {
1792 char buf[64];
1793 bool ret = false;
1794
1795 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1796 if (ret)
1797 *val = strtoull(buf, NULL, 0);
1798
1799 return ret;
1800 }
1801
1802 /* Assume advertised flags == supported flags */
1803 static const struct {
1804 uint32_t mask;
1805 const char *name;
1806 } ethtool_link_modes[] = {
1807 { ADVERTISED_10baseT_Half, "10baseT-H" },
1808 { ADVERTISED_10baseT_Full, "10baseT-F" },
1809 { ADVERTISED_100baseT_Half, "100baseT-H" },
1810 { ADVERTISED_100baseT_Full, "100baseT-F" },
1811 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1812 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1813 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1814 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1815 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1816 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1817 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1818 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1819 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1820 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1821 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1822 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1823 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1824 #ifdef ADVERTISED_56000baseKR4_Full
1825 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1826 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1827 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1828 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1829 #endif
1830 };
1831
1832 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1833 {
1834 int i;
1835 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1836 if (mask & ethtool_link_modes[i].mask)
1837 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1838 }
1839 }
1840
1841 bool
1842 system_if_force_external(const char *ifname)
1843 {
1844 char buf[64];
1845 struct stat s;
1846
1847 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1848 return stat(buf, &s) == 0;
1849 }
1850
1851 int
1852 system_if_dump_info(struct device *dev, struct blob_buf *b)
1853 {
1854 struct ethtool_cmd ecmd;
1855 struct ifreq ifr;
1856 char *s;
1857 void *c;
1858
1859 memset(&ecmd, 0, sizeof(ecmd));
1860 memset(&ifr, 0, sizeof(ifr));
1861 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1862 ifr.ifr_data = (caddr_t) &ecmd;
1863 ecmd.cmd = ETHTOOL_GSET;
1864
1865 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1866 c = blobmsg_open_array(b, "link-advertising");
1867 system_add_link_modes(b, ecmd.advertising);
1868 blobmsg_close_array(b, c);
1869
1870 c = blobmsg_open_array(b, "link-partner-advertising");
1871 system_add_link_modes(b, ecmd.lp_advertising);
1872 blobmsg_close_array(b, c);
1873
1874 c = blobmsg_open_array(b, "link-supported");
1875 system_add_link_modes(b, ecmd.supported);
1876 blobmsg_close_array(b, c);
1877
1878 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1879 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1880 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1881 blobmsg_add_string_buffer(b);
1882
1883 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1884 }
1885
1886 return 0;
1887 }
1888
1889 int
1890 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1891 {
1892 const char *const counters[] = {
1893 "collisions", "rx_frame_errors", "tx_compressed",
1894 "multicast", "rx_length_errors", "tx_dropped",
1895 "rx_bytes", "rx_missed_errors", "tx_errors",
1896 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1897 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1898 "rx_dropped", "tx_aborted_errors", "tx_packets",
1899 "rx_errors", "tx_bytes", "tx_window_errors",
1900 "rx_fifo_errors", "tx_carrier_errors",
1901 };
1902 char buf[64];
1903 int stats_dir;
1904 int i;
1905 uint64_t val = 0;
1906
1907 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1908 stats_dir = open(buf, O_DIRECTORY);
1909 if (stats_dir < 0)
1910 return -1;
1911
1912 for (i = 0; i < ARRAY_SIZE(counters); i++)
1913 if (read_uint64_file(stats_dir, counters[i], &val))
1914 blobmsg_add_u64(b, counters[i], val);
1915
1916 close(stats_dir);
1917 return 0;
1918 }
1919
1920 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1921 {
1922 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1923 int alen = v4 ? 4 : 16;
1924 unsigned int flags = 0;
1925 struct ifaddrmsg ifa = {
1926 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1927 .ifa_prefixlen = addr->mask,
1928 .ifa_index = dev->ifindex,
1929 };
1930
1931 struct nl_msg *msg;
1932 if (cmd == RTM_NEWADDR)
1933 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1934
1935 msg = nlmsg_alloc_simple(cmd, flags);
1936 if (!msg)
1937 return -1;
1938
1939 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1940 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1941 if (v4) {
1942 if (addr->broadcast)
1943 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1944 if (addr->point_to_point)
1945 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1946 } else {
1947 time_t now = system_get_rtime();
1948 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1949
1950 if (addr->preferred_until) {
1951 int64_t preferred = addr->preferred_until - now;
1952 if (preferred < 0)
1953 preferred = 0;
1954 else if (preferred > UINT32_MAX)
1955 preferred = UINT32_MAX;
1956
1957 cinfo.ifa_prefered = preferred;
1958 }
1959
1960 if (addr->valid_until) {
1961 int64_t valid = addr->valid_until - now;
1962 if (valid <= 0) {
1963 nlmsg_free(msg);
1964 return -1;
1965 }
1966 else if (valid > UINT32_MAX)
1967 valid = UINT32_MAX;
1968
1969 cinfo.ifa_valid = valid;
1970 }
1971
1972 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1973
1974 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1975 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1976 }
1977
1978 return system_rtnl_call(msg);
1979 }
1980
1981 int system_add_address(struct device *dev, struct device_addr *addr)
1982 {
1983 return system_addr(dev, addr, RTM_NEWADDR);
1984 }
1985
1986 int system_del_address(struct device *dev, struct device_addr *addr)
1987 {
1988 return system_addr(dev, addr, RTM_DELADDR);
1989 }
1990
1991 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
1992 {
1993 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1994 unsigned int flags = 0;
1995 struct ndmsg ndm = {
1996 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
1997 .ndm_ifindex = dev->ifindex,
1998 .ndm_state = NUD_PERMANENT,
1999 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2000 };
2001 struct nl_msg *msg;
2002
2003 if (cmd == RTM_NEWNEIGH)
2004 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2005
2006 msg = nlmsg_alloc_simple(cmd, flags);
2007
2008 if (!msg)
2009 return -1;
2010
2011 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2012
2013 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2014 if (neighbor->flags & DEVNEIGH_MAC)
2015 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2016
2017
2018 return system_rtnl_call(msg);
2019 }
2020
2021 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2022 {
2023 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2024 }
2025
2026 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2027 {
2028 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2029 }
2030
2031 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2032 {
2033 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2034 bool have_gw;
2035 unsigned int flags = 0;
2036
2037 if (alen == 4)
2038 have_gw = !!route->nexthop.in.s_addr;
2039 else
2040 have_gw = route->nexthop.in6.s6_addr32[0] ||
2041 route->nexthop.in6.s6_addr32[1] ||
2042 route->nexthop.in6.s6_addr32[2] ||
2043 route->nexthop.in6.s6_addr32[3];
2044
2045 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2046 ? route->table : RT_TABLE_MAIN;
2047
2048 struct rtmsg rtm = {
2049 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2050 .rtm_dst_len = route->mask,
2051 .rtm_src_len = route->sourcemask,
2052 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2053 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2054 .rtm_scope = RT_SCOPE_NOWHERE,
2055 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2056 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2057 };
2058 struct nl_msg *msg;
2059
2060 if (cmd == RTM_NEWROUTE) {
2061 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2062
2063 if (!dev) { /* Add null-route */
2064 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2065 rtm.rtm_type = RTN_UNREACHABLE;
2066 }
2067 else
2068 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2069 }
2070
2071 if (route->flags & DEVROUTE_TYPE) {
2072 rtm.rtm_type = route->type;
2073 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2074 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2075 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2076 rtm.rtm_table = RT_TABLE_LOCAL;
2077 }
2078
2079 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2080 rtm.rtm_scope = RT_SCOPE_HOST;
2081 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2082 rtm.rtm_type == RTN_ANYCAST) {
2083 rtm.rtm_scope = RT_SCOPE_LINK;
2084 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2085 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2086 rtm.rtm_type == RTN_THROW) {
2087 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2088 dev = NULL;
2089 }
2090 }
2091
2092 msg = nlmsg_alloc_simple(cmd, flags);
2093 if (!msg)
2094 return -1;
2095
2096 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2097
2098 if (route->mask)
2099 nla_put(msg, RTA_DST, alen, &route->addr);
2100
2101 if (route->sourcemask) {
2102 if (rtm.rtm_family == AF_INET)
2103 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2104 else
2105 nla_put(msg, RTA_SRC, alen, &route->source);
2106 }
2107
2108 if (route->metric > 0)
2109 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2110
2111 if (have_gw)
2112 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2113
2114 if (dev)
2115 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2116
2117 if (table >= 256)
2118 nla_put_u32(msg, RTA_TABLE, table);
2119
2120 if (route->flags & DEVROUTE_MTU) {
2121 struct nlattr *metrics;
2122
2123 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2124 goto nla_put_failure;
2125
2126 nla_put_u32(msg, RTAX_MTU, route->mtu);
2127
2128 nla_nest_end(msg, metrics);
2129 }
2130
2131 return system_rtnl_call(msg);
2132
2133 nla_put_failure:
2134 nlmsg_free(msg);
2135 return -ENOMEM;
2136 }
2137
2138 int system_add_route(struct device *dev, struct device_route *route)
2139 {
2140 return system_rt(dev, route, RTM_NEWROUTE);
2141 }
2142
2143 int system_del_route(struct device *dev, struct device_route *route)
2144 {
2145 return system_rt(dev, route, RTM_DELROUTE);
2146 }
2147
2148 int system_flush_routes(void)
2149 {
2150 const char *names[] = {
2151 "/proc/sys/net/ipv4/route/flush",
2152 "/proc/sys/net/ipv6/route/flush"
2153 };
2154 int fd, i;
2155
2156 for (i = 0; i < ARRAY_SIZE(names); i++) {
2157 fd = open(names[i], O_WRONLY);
2158 if (fd < 0)
2159 continue;
2160
2161 if (write(fd, "-1", 2)) {}
2162 close(fd);
2163 }
2164 return 0;
2165 }
2166
2167 bool system_resolve_rt_type(const char *type, unsigned int *id)
2168 {
2169 return system_rtn_aton(type, id);
2170 }
2171
2172 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2173 {
2174 FILE *f;
2175 char *e, buf[128];
2176 unsigned int n, proto = 256;
2177 n = strtoul(type, &e, 0);
2178 if (!*e && e != type)
2179 proto = n;
2180 else if (!strcmp(type, "unspec"))
2181 proto = RTPROT_UNSPEC;
2182 else if (!strcmp(type, "kernel"))
2183 proto = RTPROT_KERNEL;
2184 else if (!strcmp(type, "boot"))
2185 proto = RTPROT_BOOT;
2186 else if (!strcmp(type, "static"))
2187 proto = RTPROT_STATIC;
2188 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2189 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2190 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2191 continue;
2192
2193 n = strtoul(e, NULL, 10);
2194 e = strtok(NULL, " \t\n");
2195
2196 if (e && !strcmp(e, type)) {
2197 proto = n;
2198 break;
2199 }
2200 }
2201 fclose(f);
2202 }
2203
2204 if (proto > 255)
2205 return false;
2206
2207 *id = proto;
2208 return true;
2209 }
2210
2211 bool system_resolve_rt_table(const char *name, unsigned int *id)
2212 {
2213 FILE *f;
2214 char *e, buf[128];
2215 unsigned int n, table = RT_TABLE_UNSPEC;
2216
2217 /* first try to parse table as number */
2218 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2219 table = n;
2220
2221 /* handle well known aliases */
2222 else if (!strcmp(name, "default"))
2223 table = RT_TABLE_DEFAULT;
2224 else if (!strcmp(name, "main"))
2225 table = RT_TABLE_MAIN;
2226 else if (!strcmp(name, "local"))
2227 table = RT_TABLE_LOCAL;
2228
2229 /* try to look up name in /etc/iproute2/rt_tables */
2230 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2231 {
2232 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2233 {
2234 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2235 continue;
2236
2237 n = strtoul(e, NULL, 10);
2238 e = strtok(NULL, " \t\n");
2239
2240 if (e && !strcmp(e, name))
2241 {
2242 table = n;
2243 break;
2244 }
2245 }
2246
2247 fclose(f);
2248 }
2249
2250 if (table == RT_TABLE_UNSPEC)
2251 return false;
2252
2253 *id = table;
2254 return true;
2255 }
2256
2257 bool system_is_default_rt_table(unsigned int id)
2258 {
2259 return (id == RT_TABLE_MAIN);
2260 }
2261
2262 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2263 {
2264 char *e;
2265 unsigned int n;
2266
2267 if (!strcmp(filter, "strict"))
2268 n = 1;
2269 else if (!strcmp(filter, "loose"))
2270 n = 2;
2271 else {
2272 n = strtoul(filter, &e, 0);
2273 if (*e || e == filter || n > 2)
2274 return false;
2275 }
2276
2277 *id = n;
2278 return true;
2279 }
2280
2281 static int system_iprule(struct iprule *rule, int cmd)
2282 {
2283 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2284
2285 struct nl_msg *msg;
2286 struct rtmsg rtm = {
2287 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2288 .rtm_protocol = RTPROT_STATIC,
2289 .rtm_scope = RT_SCOPE_UNIVERSE,
2290 .rtm_table = RT_TABLE_UNSPEC,
2291 .rtm_type = RTN_UNSPEC,
2292 .rtm_flags = 0,
2293 };
2294
2295 if (cmd == RTM_NEWRULE)
2296 rtm.rtm_type = RTN_UNICAST;
2297
2298 if (rule->invert)
2299 rtm.rtm_flags |= FIB_RULE_INVERT;
2300
2301 if (rule->flags & IPRULE_SRC)
2302 rtm.rtm_src_len = rule->src_mask;
2303
2304 if (rule->flags & IPRULE_DEST)
2305 rtm.rtm_dst_len = rule->dest_mask;
2306
2307 if (rule->flags & IPRULE_TOS)
2308 rtm.rtm_tos = rule->tos;
2309
2310 if (rule->flags & IPRULE_LOOKUP) {
2311 if (rule->lookup < 256)
2312 rtm.rtm_table = rule->lookup;
2313 }
2314
2315 if (rule->flags & IPRULE_ACTION)
2316 rtm.rtm_type = rule->action;
2317 else if (rule->flags & IPRULE_GOTO)
2318 rtm.rtm_type = FR_ACT_GOTO;
2319 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2320 rtm.rtm_type = FR_ACT_NOP;
2321
2322 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2323
2324 if (!msg)
2325 return -1;
2326
2327 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2328
2329 if (rule->flags & IPRULE_IN)
2330 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2331
2332 if (rule->flags & IPRULE_OUT)
2333 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2334
2335 if (rule->flags & IPRULE_SRC)
2336 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2337
2338 if (rule->flags & IPRULE_DEST)
2339 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2340
2341 if (rule->flags & IPRULE_PRIORITY)
2342 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2343 else if (cmd == RTM_NEWRULE)
2344 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2345
2346 if (rule->flags & IPRULE_FWMARK)
2347 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2348
2349 if (rule->flags & IPRULE_FWMASK)
2350 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2351
2352 if (rule->flags & IPRULE_LOOKUP) {
2353 if (rule->lookup >= 256)
2354 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2355 }
2356
2357 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2358 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2359
2360 if (rule->flags & IPRULE_GOTO)
2361 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2362
2363 return system_rtnl_call(msg);
2364 }
2365
2366 int system_add_iprule(struct iprule *rule)
2367 {
2368 return system_iprule(rule, RTM_NEWRULE);
2369 }
2370
2371 int system_del_iprule(struct iprule *rule)
2372 {
2373 return system_iprule(rule, RTM_DELRULE);
2374 }
2375
2376 int system_flush_iprules(void)
2377 {
2378 int rv = 0;
2379 struct iprule rule;
2380
2381 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2382 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2383
2384 memset(&rule, 0, sizeof(rule));
2385
2386
2387 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2388
2389 rule.priority = 0;
2390 rule.lookup = RT_TABLE_LOCAL;
2391 rv |= system_iprule(&rule, RTM_NEWRULE);
2392
2393 rule.priority = 32766;
2394 rule.lookup = RT_TABLE_MAIN;
2395 rv |= system_iprule(&rule, RTM_NEWRULE);
2396
2397 rule.priority = 32767;
2398 rule.lookup = RT_TABLE_DEFAULT;
2399 rv |= system_iprule(&rule, RTM_NEWRULE);
2400
2401
2402 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2403
2404 rule.priority = 0;
2405 rule.lookup = RT_TABLE_LOCAL;
2406 rv |= system_iprule(&rule, RTM_NEWRULE);
2407
2408 rule.priority = 32766;
2409 rule.lookup = RT_TABLE_MAIN;
2410 rv |= system_iprule(&rule, RTM_NEWRULE);
2411
2412 return rv;
2413 }
2414
2415 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2416 {
2417 return system_rtn_aton(action, id);
2418 }
2419
2420 time_t system_get_rtime(void)
2421 {
2422 struct timespec ts;
2423 struct timeval tv;
2424
2425 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2426 return ts.tv_sec;
2427
2428 if (gettimeofday(&tv, NULL) == 0)
2429 return tv.tv_sec;
2430
2431 return 0;
2432 }
2433
2434 #ifndef IP_DF
2435 #define IP_DF 0x4000
2436 #endif
2437
2438 static int tunnel_ioctl(const char *name, int cmd, void *p)
2439 {
2440 struct ifreq ifr;
2441
2442 memset(&ifr, 0, sizeof(ifr));
2443 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2444 ifr.ifr_ifru.ifru_data = p;
2445 return ioctl(sock_ioctl, cmd, &ifr);
2446 }
2447
2448 #ifdef IFLA_IPTUN_MAX
2449 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2450 struct blob_attr **tb)
2451 {
2452 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2453 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2454 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2455 struct blob_attr *cur;
2456 int ret = 0, ttl = 0;
2457
2458 if (!nlm)
2459 return -1;
2460
2461 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2462 nla_put_string(nlm, IFLA_IFNAME, name);
2463
2464 if (link)
2465 nla_put_u32(nlm, IFLA_LINK, link);
2466
2467 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2468 if (!linkinfo) {
2469 ret = -ENOMEM;
2470 goto failure;
2471 }
2472
2473 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2474 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2475 if (!infodata) {
2476 ret = -ENOMEM;
2477 goto failure;
2478 }
2479
2480 if (link)
2481 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2482
2483 if ((cur = tb[TUNNEL_ATTR_TTL]))
2484 ttl = blobmsg_get_u32(cur);
2485
2486 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2487 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2488
2489 struct in6_addr in6buf;
2490 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2491 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2492 ret = -EINVAL;
2493 goto failure;
2494 }
2495 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2496 }
2497
2498 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2499 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2500 ret = -EINVAL;
2501 goto failure;
2502 }
2503 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2504 }
2505
2506 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2507 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2508 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2509
2510 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2511 blobmsg_data(cur), blobmsg_len(cur));
2512
2513 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2514 char *str = blobmsg_get_string(cur);
2515
2516 if (strcmp(str, "ignore")) {
2517 char *e;
2518 unsigned encap_limit = strtoul(str, &e, 0);
2519
2520 if (e == str || *e || encap_limit > 255) {
2521 ret = -EINVAL;
2522 goto failure;
2523 }
2524
2525 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2526 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2527 }
2528 }
2529
2530 #ifdef IFLA_IPTUN_FMR_MAX
2531 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2532 struct blob_attr *rcur;
2533 unsigned rrem, fmrcnt = 0;
2534 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2535
2536 if (!fmrs) {
2537 ret = -ENOMEM;
2538 goto failure;
2539 }
2540
2541 blobmsg_for_each_attr(rcur, cur, rrem) {
2542 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2543 struct in6_addr ip6prefix;
2544 struct in_addr ip4prefix;
2545 unsigned ip4len, ip6len, ealen, offset;
2546
2547 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2548 blobmsg_data(rcur), blobmsg_len(rcur));
2549
2550 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2551 !parse_ip_and_netmask(AF_INET6,
2552 blobmsg_data(tb_cur), &ip6prefix,
2553 &ip6len)) {
2554 ret = -EINVAL;
2555 goto failure;
2556 }
2557
2558 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2559 !parse_ip_and_netmask(AF_INET,
2560 blobmsg_data(tb_cur), &ip4prefix,
2561 &ip4len)) {
2562 ret = -EINVAL;
2563 goto failure;
2564 }
2565
2566 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2567 ret = -EINVAL;
2568 goto failure;
2569 }
2570 ealen = blobmsg_get_u32(tb_cur);
2571
2572 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2573 ret = -EINVAL;
2574 goto failure;
2575 }
2576 offset = blobmsg_get_u32(tb_cur);
2577
2578 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2579 if (!rule) {
2580 ret = -ENOMEM;
2581 goto failure;
2582 }
2583
2584 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2585 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2586 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2587 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2588 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2589 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2590
2591 nla_nest_end(nlm, rule);
2592 }
2593
2594 nla_nest_end(nlm, fmrs);
2595 }
2596 #endif
2597 if (tun_flags)
2598 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2599 }
2600
2601 nla_nest_end(nlm, infodata);
2602 nla_nest_end(nlm, linkinfo);
2603
2604 return system_rtnl_call(nlm);
2605
2606 failure:
2607 nlmsg_free(nlm);
2608 return ret;
2609 }
2610 #endif
2611
2612 #ifdef IFLA_IPTUN_MAX
2613 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2614 static int system_add_gre_tunnel(const char *name, const char *kind,
2615 const unsigned int link, struct blob_attr **tb, bool v6)
2616 {
2617 struct nl_msg *nlm;
2618 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2619 struct blob_attr *cur;
2620 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2621 uint16_t iflags = 0, oflags = 0;
2622 uint8_t tos = 0;
2623 int ret = 0, ttl = 0;
2624 unsigned encap_limit = 0;
2625
2626 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2627 if (!nlm)
2628 return -1;
2629
2630 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2631 nla_put_string(nlm, IFLA_IFNAME, name);
2632
2633 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2634 if (!linkinfo) {
2635 ret = -ENOMEM;
2636 goto failure;
2637 }
2638
2639 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2640 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2641 if (!infodata) {
2642 ret = -ENOMEM;
2643 goto failure;
2644 }
2645
2646 if (link)
2647 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2648
2649 if ((cur = tb[TUNNEL_ATTR_TTL]))
2650 ttl = blobmsg_get_u32(cur);
2651
2652 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2653 char *str = blobmsg_get_string(cur);
2654 if (strcmp(str, "inherit")) {
2655 unsigned uval;
2656
2657 if (!system_tos_aton(str, &uval)) {
2658 ret = -EINVAL;
2659 goto failure;
2660 }
2661
2662 if (v6)
2663 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2664 else
2665 tos = uval;
2666 } else {
2667 if (v6)
2668 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2669 else
2670 tos = 1;
2671 }
2672 }
2673
2674 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2675 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2676
2677 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2678 blobmsg_data(cur), blobmsg_len(cur));
2679
2680 if ((cur = tb_data[GRE_DATA_IKEY])) {
2681 if ((ikey = blobmsg_get_u32(cur)))
2682 iflags |= GRE_KEY;
2683 }
2684
2685 if ((cur = tb_data[GRE_DATA_OKEY])) {
2686 if ((okey = blobmsg_get_u32(cur)))
2687 oflags |= GRE_KEY;
2688 }
2689
2690 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2691 if (blobmsg_get_bool(cur))
2692 iflags |= GRE_CSUM;
2693 }
2694
2695 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2696 if (blobmsg_get_bool(cur))
2697 oflags |= GRE_CSUM;
2698 }
2699
2700 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2701 if (blobmsg_get_bool(cur))
2702 iflags |= GRE_SEQ;
2703 }
2704
2705 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2706 if (blobmsg_get_bool(cur))
2707 oflags |= GRE_SEQ;
2708 }
2709
2710 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2711 char *str = blobmsg_get_string(cur);
2712
2713 if (strcmp(str, "ignore")) {
2714 char *e;
2715
2716 encap_limit = strtoul(str, &e, 0);
2717
2718 if (e == str || *e || encap_limit > 255) {
2719 ret = -EINVAL;
2720 goto failure;
2721 }
2722
2723 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2724 }
2725 }
2726 }
2727
2728 if (v6) {
2729 struct in6_addr in6buf;
2730 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2731 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2732 ret = -EINVAL;
2733 goto failure;
2734 }
2735 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2736 }
2737
2738 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2739 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2740 ret = -EINVAL;
2741 goto failure;
2742 }
2743 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2744 }
2745
2746 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2747 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2748
2749 if (flowinfo)
2750 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2751
2752 if (flags6)
2753 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2754
2755 if (!ttl)
2756 ttl = 64;
2757 } else {
2758 struct in_addr inbuf;
2759 bool set_df = true;
2760
2761 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2762 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2763 ret = -EINVAL;
2764 goto failure;
2765 }
2766 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2767 }
2768
2769 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2770 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2771 ret = -EINVAL;
2772 goto failure;
2773 }
2774 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2775
2776 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2777 if (!okey) {
2778 okey = inbuf.s_addr;
2779 oflags |= GRE_KEY;
2780 }
2781
2782 if (!ikey) {
2783 ikey = inbuf.s_addr;
2784 iflags |= GRE_KEY;
2785 }
2786 }
2787 }
2788
2789 if ((cur = tb[TUNNEL_ATTR_DF]))
2790 set_df = blobmsg_get_bool(cur);
2791
2792 if (!set_df) {
2793 /* ttl != 0 and nopmtudisc are incompatible */
2794 if (ttl) {
2795 ret = -EINVAL;
2796 goto failure;
2797 }
2798 } else if (!ttl)
2799 ttl = 64;
2800
2801 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2802
2803 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2804 }
2805
2806 if (ttl)
2807 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2808
2809 if (oflags)
2810 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2811
2812 if (iflags)
2813 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2814
2815 if (okey)
2816 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2817
2818 if (ikey)
2819 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2820
2821 nla_nest_end(nlm, infodata);
2822 nla_nest_end(nlm, linkinfo);
2823
2824 return system_rtnl_call(nlm);
2825
2826 failure:
2827 nlmsg_free(nlm);
2828 return ret;
2829 }
2830 #endif
2831
2832 #ifdef IFLA_VTI_MAX
2833 static int system_add_vti_tunnel(const char *name, const char *kind,
2834 const unsigned int link, struct blob_attr **tb, bool v6)
2835 {
2836 struct nl_msg *nlm;
2837 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2838 struct blob_attr *cur;
2839 int ret = 0;
2840
2841 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2842 if (!nlm)
2843 return -1;
2844
2845 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2846 nla_put_string(nlm, IFLA_IFNAME, name);
2847
2848 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2849 if (!linkinfo) {
2850 ret = -ENOMEM;
2851 goto failure;
2852 }
2853
2854 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2855 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2856 if (!infodata) {
2857 ret = -ENOMEM;
2858 goto failure;
2859 }
2860
2861 if (link)
2862 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2863
2864 if (v6) {
2865 struct in6_addr in6buf;
2866 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2867 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2868 ret = -EINVAL;
2869 goto failure;
2870 }
2871 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2872 }
2873
2874 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2875 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2876 ret = -EINVAL;
2877 goto failure;
2878 }
2879 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2880 }
2881
2882 } else {
2883 struct in_addr inbuf;
2884
2885 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2886 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2887 ret = -EINVAL;
2888 goto failure;
2889 }
2890 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2891 }
2892
2893 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2894 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2895 ret = -EINVAL;
2896 goto failure;
2897 }
2898 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2899 }
2900
2901 }
2902
2903 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2904 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2905 uint32_t ikey = 0, okey = 0;
2906
2907 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2908 blobmsg_data(cur), blobmsg_len(cur));
2909
2910 if ((cur = tb_data[VTI_DATA_IKEY])) {
2911 if ((ikey = blobmsg_get_u32(cur)))
2912 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2913 }
2914
2915 if ((cur = tb_data[VTI_DATA_OKEY])) {
2916 if ((okey = blobmsg_get_u32(cur)))
2917 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2918 }
2919 }
2920
2921 nla_nest_end(nlm, infodata);
2922 nla_nest_end(nlm, linkinfo);
2923
2924 return system_rtnl_call(nlm);
2925
2926 failure:
2927 nlmsg_free(nlm);
2928 return ret;
2929 }
2930 #endif
2931
2932 #ifdef IFLA_XFRM_MAX
2933 static int system_add_xfrm_tunnel(const char *name, const char *kind,
2934 const unsigned int link, struct blob_attr **tb)
2935 {
2936 struct nl_msg *nlm;
2937 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2938 struct blob_attr *cur;
2939 int ret = 0;
2940
2941 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2942 if (!nlm)
2943 return -1;
2944
2945 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2946 nla_put_string(nlm, IFLA_IFNAME, name);
2947
2948 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2949 if (!linkinfo) {
2950 ret = -ENOMEM;
2951 goto failure;
2952 }
2953
2954 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2955 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2956 if (!infodata) {
2957 ret = -ENOMEM;
2958 goto failure;
2959 }
2960
2961 if (link)
2962 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
2963
2964 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2965 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
2966 uint32_t if_id = 0;
2967
2968 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
2969 blobmsg_data(cur), blobmsg_len(cur));
2970
2971 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
2972 if ((if_id = blobmsg_get_u32(cur)))
2973 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
2974 }
2975
2976 }
2977
2978 nla_nest_end(nlm, infodata);
2979 nla_nest_end(nlm, linkinfo);
2980
2981 return system_rtnl_call(nlm);
2982
2983 failure:
2984 nlmsg_free(nlm);
2985 return ret;
2986 }
2987 #endif
2988
2989 #ifdef IFLA_VXLAN_MAX
2990 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2991 {
2992 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2993 struct nl_msg *msg;
2994 struct nlattr *linkinfo, *data;
2995 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2996 struct blob_attr *cur;
2997 int ret = 0;
2998
2999 if ((cur = tb[TUNNEL_ATTR_DATA]))
3000 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3001 blobmsg_data(cur), blobmsg_len(cur));
3002 else
3003 return -EINVAL;
3004
3005 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3006
3007 if (!msg)
3008 return -1;
3009
3010 nlmsg_append(msg, &iim, sizeof(iim), 0);
3011
3012 nla_put_string(msg, IFLA_IFNAME, name);
3013
3014 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3015 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3016 if (!ea) {
3017 ret = -EINVAL;
3018 goto failure;
3019 }
3020
3021 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3022 }
3023
3024 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3025 uint32_t mtu = blobmsg_get_u32(cur);
3026 nla_put_u32(msg, IFLA_MTU, mtu);
3027 }
3028
3029 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3030 ret = -ENOMEM;
3031 goto failure;
3032 }
3033
3034 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3035
3036 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3037 ret = -ENOMEM;
3038 goto failure;
3039 }
3040
3041 if (link)
3042 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3043
3044 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3045 uint32_t id = blobmsg_get_u32(cur);
3046 if (id >= (1u << 24) - 1) {
3047 ret = -EINVAL;
3048 goto failure;
3049 }
3050
3051 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3052 }
3053
3054 if (v6) {
3055 struct in6_addr in6buf;
3056 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3057 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3058 ret = -EINVAL;
3059 goto failure;
3060 }
3061 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3062 }
3063
3064 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3065 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3066 ret = -EINVAL;
3067 goto failure;
3068 }
3069 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3070 }
3071 } else {
3072 struct in_addr inbuf;
3073
3074 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3075 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3076 ret = -EINVAL;
3077 goto failure;
3078 }
3079 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3080 }
3081
3082 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3083 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3084 ret = -EINVAL;
3085 goto failure;
3086 }
3087 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3088 }
3089 }
3090
3091 uint32_t port = 4789;
3092 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3093 port = blobmsg_get_u32(cur);
3094 if (port < 1 || port > 65535) {
3095 ret = -EINVAL;
3096 goto failure;
3097 }
3098 }
3099 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3100
3101 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
3102 bool rxcsum = blobmsg_get_bool(cur);
3103 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
3104 }
3105
3106 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
3107 bool txcsum = blobmsg_get_bool(cur);
3108 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
3109 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
3110 }
3111
3112 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3113 char *str = blobmsg_get_string(cur);
3114 unsigned tos = 1;
3115
3116 if (strcmp(str, "inherit")) {
3117 if (!system_tos_aton(str, &tos)) {
3118 ret = -EINVAL;
3119 goto failure;
3120 }
3121 }
3122
3123 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3124 }
3125
3126 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3127 uint32_t ttl = blobmsg_get_u32(cur);
3128 if (ttl < 1 || ttl > 255) {
3129 ret = -EINVAL;
3130 goto failure;
3131 }
3132
3133 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3134 }
3135
3136 nla_nest_end(msg, data);
3137 nla_nest_end(msg, linkinfo);
3138
3139 ret = system_rtnl_call(msg);
3140 if (ret)
3141 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3142
3143 return ret;
3144
3145 failure:
3146 nlmsg_free(msg);
3147 return ret;
3148 }
3149 #endif
3150
3151 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3152 {
3153 struct blob_attr *cur;
3154 int ret = 0;
3155
3156 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3157 return -1;
3158
3159 #ifdef SIOCADD6RD
3160 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3161 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3162 unsigned int mask;
3163 struct ip_tunnel_6rd p6;
3164
3165 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3166 blobmsg_data(cur), blobmsg_len(cur));
3167
3168 memset(&p6, 0, sizeof(p6));
3169
3170 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3171 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3172 &p6.prefix, &mask) || mask > 128) {
3173 ret = -EINVAL;
3174 goto failure;
3175 }
3176
3177 p6.prefixlen = mask;
3178 }
3179
3180 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3181 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3182 &p6.relay_prefix, &mask) || mask > 32) {
3183 ret = -EINVAL;
3184 goto failure;
3185 }
3186
3187 p6.relay_prefixlen = mask;
3188 }
3189
3190 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3191 ret = -1;
3192 goto failure;
3193 }
3194 }
3195 #endif
3196
3197 return ret;
3198
3199 failure:
3200 __system_del_ip_tunnel(name, tb);
3201 return ret;
3202 }
3203
3204 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3205 {
3206 struct blob_attr *cur;
3207 bool set_df = true;
3208 struct ip_tunnel_parm p = {
3209 .link = link,
3210 .iph = {
3211 .version = 4,
3212 .ihl = 5,
3213 .protocol = proto,
3214 }
3215 };
3216
3217 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3218 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3219 return -EINVAL;
3220
3221 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3222 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3223 return -EINVAL;
3224
3225 if ((cur = tb[TUNNEL_ATTR_DF]))
3226 set_df = blobmsg_get_bool(cur);
3227
3228 if ((cur = tb[TUNNEL_ATTR_TTL]))
3229 p.iph.ttl = blobmsg_get_u32(cur);
3230
3231 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3232 char *str = blobmsg_get_string(cur);
3233 if (strcmp(str, "inherit")) {
3234 unsigned uval;
3235
3236 if (!system_tos_aton(str, &uval))
3237 return -EINVAL;
3238
3239 p.iph.tos = uval;
3240 } else
3241 p.iph.tos = 1;
3242 }
3243
3244 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3245 /* ttl !=0 and nopmtudisc are incompatible */
3246 if (p.iph.ttl && p.iph.frag_off == 0)
3247 return -EINVAL;
3248
3249 strncpy(p.name, name, sizeof(p.name) - 1);
3250
3251 switch (p.iph.protocol) {
3252 case IPPROTO_IPIP:
3253 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3254 case IPPROTO_IPV6:
3255 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3256 default:
3257 break;
3258 }
3259 return -1;
3260 }
3261
3262 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3263 {
3264 struct blob_attr *cur;
3265 const char *str;
3266
3267 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3268 return -EINVAL;
3269 str = blobmsg_data(cur);
3270
3271 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3272 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3273 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3274 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3275 !strcmp(str, "xfrm"))
3276 return system_link_del(name);
3277 else
3278 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3279 }
3280
3281 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3282 {
3283 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3284
3285 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3286 blob_data(attr), blob_len(attr));
3287
3288 return __system_del_ip_tunnel(name, tb);
3289 }
3290
3291 int system_update_ipv6_mtu(struct device *dev, int mtu)
3292 {
3293 int ret = -1;
3294 char buf[64];
3295 int fd;
3296
3297 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3298 dev->ifname);
3299
3300 fd = open(buf, O_RDWR);
3301 if (fd < 0)
3302 return ret;
3303
3304 if (!mtu) {
3305 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3306 if (len < 0)
3307 goto out;
3308
3309 buf[len] = 0;
3310 ret = atoi(buf);
3311 } else {
3312 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3313 ret = mtu;
3314 }
3315
3316 out:
3317 close(fd);
3318 return ret;
3319 }
3320
3321 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3322 {
3323 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3324 struct blob_attr *cur;
3325 const char *str;
3326
3327 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3328 blob_data(attr), blob_len(attr));
3329
3330 __system_del_ip_tunnel(name, tb);
3331
3332 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3333 return -EINVAL;
3334 str = blobmsg_data(cur);
3335
3336 unsigned int ttl = 0;
3337 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3338 ttl = blobmsg_get_u32(cur);
3339 if (ttl > 255)
3340 return -EINVAL;
3341 }
3342
3343 unsigned int link = 0;
3344 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3345 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3346 if (!iface)
3347 return -EINVAL;
3348
3349 if (iface->l3_dev.dev)
3350 link = iface->l3_dev.dev->ifindex;
3351 }
3352
3353 if (!strcmp(str, "sit"))
3354 return system_add_sit_tunnel(name, link, tb);
3355 #ifdef IFLA_IPTUN_MAX
3356 else if (!strcmp(str, "ipip6")) {
3357 return system_add_ip6_tunnel(name, link, tb);
3358 } else if (!strcmp(str, "greip")) {
3359 return system_add_gre_tunnel(name, "gre", link, tb, false);
3360 } else if (!strcmp(str, "gretapip")) {
3361 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3362 } else if (!strcmp(str, "greip6")) {
3363 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3364 } else if (!strcmp(str, "gretapip6")) {
3365 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3366 #ifdef IFLA_VTI_MAX
3367 } else if (!strcmp(str, "vtiip")) {
3368 return system_add_vti_tunnel(name, "vti", link, tb, false);
3369 } else if (!strcmp(str, "vtiip6")) {
3370 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3371 #endif
3372 #ifdef IFLA_XFRM_MAX
3373 } else if (!strcmp(str, "xfrm")) {
3374 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3375 #endif
3376 #ifdef IFLA_VXLAN_MAX
3377 } else if(!strcmp(str, "vxlan")) {
3378 return system_add_vxlan(name, link, tb, false);
3379 } else if(!strcmp(str, "vxlan6")) {
3380 return system_add_vxlan(name, link, tb, true);
3381 #endif
3382 #endif
3383 } else if (!strcmp(str, "ipip")) {
3384 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3385 }
3386 else
3387 return -EINVAL;
3388
3389 return 0;
3390 }
OpenWrt Network interface configuration daemon