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