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