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system-linux: fix segfault on alloc failure in system_if_check()
[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 if (!cb)
1575 return ret;
1576
1577 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1578 if (!msg)
1579 goto out;
1580
1581 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1582 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1583 goto free;
1584
1585 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1586 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1587 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1588
1589 nl_send_auto_complete(sock_rtnl, msg);
1590 while (chk.pending > 0)
1591 nl_recvmsgs(sock_rtnl, cb);
1592
1593 ret = chk.pending;
1594
1595 free:
1596 nlmsg_free(msg);
1597 out:
1598 nl_cb_put(cb);
1599 return ret;
1600 }
1601
1602 struct device *
1603 system_if_get_parent(struct device *dev)
1604 {
1605 char buf[64], *devname;
1606 int ifindex, iflink, len;
1607 FILE *f;
1608
1609 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1610 f = fopen(buf, "r");
1611 if (!f)
1612 return NULL;
1613
1614 len = fread(buf, 1, sizeof(buf) - 1, f);
1615 fclose(f);
1616
1617 if (len <= 0)
1618 return NULL;
1619
1620 buf[len] = 0;
1621 iflink = strtoul(buf, NULL, 0);
1622 ifindex = system_if_resolve(dev);
1623 if (!iflink || iflink == ifindex)
1624 return NULL;
1625
1626 devname = if_indextoname(iflink, buf);
1627 if (!devname)
1628 return NULL;
1629
1630 return device_get(devname, true);
1631 }
1632
1633 static bool
1634 read_string_file(int dir_fd, const char *file, char *buf, int len)
1635 {
1636 bool ret = false;
1637 char *c;
1638 int fd;
1639
1640 fd = openat(dir_fd, file, O_RDONLY);
1641 if (fd < 0)
1642 return false;
1643
1644 retry:
1645 len = read(fd, buf, len - 1);
1646 if (len < 0) {
1647 if (errno == EINTR)
1648 goto retry;
1649 } else if (len > 0) {
1650 buf[len] = 0;
1651
1652 c = strchr(buf, '\n');
1653 if (c)
1654 *c = 0;
1655
1656 ret = true;
1657 }
1658
1659 close(fd);
1660
1661 return ret;
1662 }
1663
1664 static bool
1665 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1666 {
1667 char buf[64];
1668 bool ret = false;
1669
1670 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1671 if (ret)
1672 *val = strtoull(buf, NULL, 0);
1673
1674 return ret;
1675 }
1676
1677 /* Assume advertised flags == supported flags */
1678 static const struct {
1679 uint32_t mask;
1680 const char *name;
1681 } ethtool_link_modes[] = {
1682 { ADVERTISED_10baseT_Half, "10H" },
1683 { ADVERTISED_10baseT_Full, "10F" },
1684 { ADVERTISED_100baseT_Half, "100H" },
1685 { ADVERTISED_100baseT_Full, "100F" },
1686 { ADVERTISED_1000baseT_Half, "1000H" },
1687 { ADVERTISED_1000baseT_Full, "1000F" },
1688 };
1689
1690 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1691 {
1692 int i;
1693 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1694 if (mask & ethtool_link_modes[i].mask)
1695 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1696 }
1697 }
1698
1699 bool
1700 system_if_force_external(const char *ifname)
1701 {
1702 char buf[64];
1703 struct stat s;
1704
1705 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1706 return stat(buf, &s) == 0;
1707 }
1708
1709 int
1710 system_if_dump_info(struct device *dev, struct blob_buf *b)
1711 {
1712 struct ethtool_cmd ecmd;
1713 struct ifreq ifr;
1714 char *s;
1715 void *c;
1716
1717 memset(&ecmd, 0, sizeof(ecmd));
1718 memset(&ifr, 0, sizeof(ifr));
1719 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1720 ifr.ifr_data = (caddr_t) &ecmd;
1721 ecmd.cmd = ETHTOOL_GSET;
1722
1723 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1724 c = blobmsg_open_array(b, "link-advertising");
1725 system_add_link_modes(b, ecmd.advertising);
1726 blobmsg_close_array(b, c);
1727
1728 c = blobmsg_open_array(b, "link-supported");
1729 system_add_link_modes(b, ecmd.supported);
1730 blobmsg_close_array(b, c);
1731
1732 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1733 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1734 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1735 blobmsg_add_string_buffer(b);
1736 }
1737
1738 return 0;
1739 }
1740
1741 int
1742 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1743 {
1744 const char *const counters[] = {
1745 "collisions", "rx_frame_errors", "tx_compressed",
1746 "multicast", "rx_length_errors", "tx_dropped",
1747 "rx_bytes", "rx_missed_errors", "tx_errors",
1748 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1749 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1750 "rx_dropped", "tx_aborted_errors", "tx_packets",
1751 "rx_errors", "tx_bytes", "tx_window_errors",
1752 "rx_fifo_errors", "tx_carrier_errors",
1753 };
1754 char buf[64];
1755 int stats_dir;
1756 int i;
1757 uint64_t val = 0;
1758
1759 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1760 stats_dir = open(buf, O_DIRECTORY);
1761 if (stats_dir < 0)
1762 return -1;
1763
1764 for (i = 0; i < ARRAY_SIZE(counters); i++)
1765 if (read_uint64_file(stats_dir, counters[i], &val))
1766 blobmsg_add_u64(b, counters[i], val);
1767
1768 close(stats_dir);
1769 return 0;
1770 }
1771
1772 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1773 {
1774 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1775 int alen = v4 ? 4 : 16;
1776 unsigned int flags = 0;
1777 struct ifaddrmsg ifa = {
1778 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1779 .ifa_prefixlen = addr->mask,
1780 .ifa_index = dev->ifindex,
1781 };
1782
1783 struct nl_msg *msg;
1784 if (cmd == RTM_NEWADDR)
1785 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1786
1787 msg = nlmsg_alloc_simple(cmd, flags);
1788 if (!msg)
1789 return -1;
1790
1791 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1792 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1793 if (v4) {
1794 if (addr->broadcast)
1795 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1796 if (addr->point_to_point)
1797 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1798 } else {
1799 time_t now = system_get_rtime();
1800 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1801
1802 if (addr->preferred_until) {
1803 int64_t preferred = addr->preferred_until - now;
1804 if (preferred < 0)
1805 preferred = 0;
1806 else if (preferred > UINT32_MAX)
1807 preferred = UINT32_MAX;
1808
1809 cinfo.ifa_prefered = preferred;
1810 }
1811
1812 if (addr->valid_until) {
1813 int64_t valid = addr->valid_until - now;
1814 if (valid <= 0) {
1815 nlmsg_free(msg);
1816 return -1;
1817 }
1818 else if (valid > UINT32_MAX)
1819 valid = UINT32_MAX;
1820
1821 cinfo.ifa_valid = valid;
1822 }
1823
1824 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1825
1826 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1827 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1828 }
1829
1830 return system_rtnl_call(msg);
1831 }
1832
1833 int system_add_address(struct device *dev, struct device_addr *addr)
1834 {
1835 return system_addr(dev, addr, RTM_NEWADDR);
1836 }
1837
1838 int system_del_address(struct device *dev, struct device_addr *addr)
1839 {
1840 return system_addr(dev, addr, RTM_DELADDR);
1841 }
1842
1843 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1844 {
1845 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1846 bool have_gw;
1847 unsigned int flags = 0;
1848
1849 if (alen == 4)
1850 have_gw = !!route->nexthop.in.s_addr;
1851 else
1852 have_gw = route->nexthop.in6.s6_addr32[0] ||
1853 route->nexthop.in6.s6_addr32[1] ||
1854 route->nexthop.in6.s6_addr32[2] ||
1855 route->nexthop.in6.s6_addr32[3];
1856
1857 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1858 ? route->table : RT_TABLE_MAIN;
1859
1860 struct rtmsg rtm = {
1861 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1862 .rtm_dst_len = route->mask,
1863 .rtm_src_len = route->sourcemask,
1864 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1865 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1866 .rtm_scope = RT_SCOPE_NOWHERE,
1867 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1868 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1869 };
1870 struct nl_msg *msg;
1871
1872 if (cmd == RTM_NEWROUTE) {
1873 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1874
1875 if (!dev) { // Add null-route
1876 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1877 rtm.rtm_type = RTN_UNREACHABLE;
1878 }
1879 else
1880 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1881 }
1882
1883 if (route->flags & DEVROUTE_TYPE) {
1884 rtm.rtm_type = route->type;
1885 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1886 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1887 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1888 rtm.rtm_table = RT_TABLE_LOCAL;
1889 }
1890
1891 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1892 rtm.rtm_scope = RT_SCOPE_HOST;
1893 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1894 rtm.rtm_type == RTN_ANYCAST) {
1895 rtm.rtm_scope = RT_SCOPE_LINK;
1896 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1897 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1898 rtm.rtm_type == RTN_THROW) {
1899 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1900 dev = NULL;
1901 }
1902 }
1903
1904 msg = nlmsg_alloc_simple(cmd, flags);
1905 if (!msg)
1906 return -1;
1907
1908 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1909
1910 if (route->mask)
1911 nla_put(msg, RTA_DST, alen, &route->addr);
1912
1913 if (route->sourcemask) {
1914 if (rtm.rtm_family == AF_INET)
1915 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1916 else
1917 nla_put(msg, RTA_SRC, alen, &route->source);
1918 }
1919
1920 if (route->metric > 0)
1921 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1922
1923 if (have_gw)
1924 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1925
1926 if (dev)
1927 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1928
1929 if (table >= 256)
1930 nla_put_u32(msg, RTA_TABLE, table);
1931
1932 if (route->flags & DEVROUTE_MTU) {
1933 struct nlattr *metrics;
1934
1935 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1936 goto nla_put_failure;
1937
1938 nla_put_u32(msg, RTAX_MTU, route->mtu);
1939
1940 nla_nest_end(msg, metrics);
1941 }
1942
1943 return system_rtnl_call(msg);
1944
1945 nla_put_failure:
1946 nlmsg_free(msg);
1947 return -ENOMEM;
1948 }
1949
1950 int system_add_route(struct device *dev, struct device_route *route)
1951 {
1952 return system_rt(dev, route, RTM_NEWROUTE);
1953 }
1954
1955 int system_del_route(struct device *dev, struct device_route *route)
1956 {
1957 return system_rt(dev, route, RTM_DELROUTE);
1958 }
1959
1960 int system_flush_routes(void)
1961 {
1962 const char *names[] = {
1963 "/proc/sys/net/ipv4/route/flush",
1964 "/proc/sys/net/ipv6/route/flush"
1965 };
1966 int fd, i;
1967
1968 for (i = 0; i < ARRAY_SIZE(names); i++) {
1969 fd = open(names[i], O_WRONLY);
1970 if (fd < 0)
1971 continue;
1972
1973 if (write(fd, "-1", 2)) {}
1974 close(fd);
1975 }
1976 return 0;
1977 }
1978
1979 bool system_resolve_rt_type(const char *type, unsigned int *id)
1980 {
1981 return system_rtn_aton(type, id);
1982 }
1983
1984 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1985 {
1986 FILE *f;
1987 char *e, buf[128];
1988 unsigned int n, proto = 256;
1989 n = strtoul(type, &e, 0);
1990 if (!*e && e != type)
1991 proto = n;
1992 else if (!strcmp(type, "unspec"))
1993 proto = RTPROT_UNSPEC;
1994 else if (!strcmp(type, "kernel"))
1995 proto = RTPROT_KERNEL;
1996 else if (!strcmp(type, "boot"))
1997 proto = RTPROT_BOOT;
1998 else if (!strcmp(type, "static"))
1999 proto = RTPROT_STATIC;
2000 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2001 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2002 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2003 continue;
2004
2005 n = strtoul(e, NULL, 10);
2006 e = strtok(NULL, " \t\n");
2007
2008 if (e && !strcmp(e, type)) {
2009 proto = n;
2010 break;
2011 }
2012 }
2013 fclose(f);
2014 }
2015
2016 if (proto > 255)
2017 return false;
2018
2019 *id = proto;
2020 return true;
2021 }
2022
2023 bool system_resolve_rt_table(const char *name, unsigned int *id)
2024 {
2025 FILE *f;
2026 char *e, buf[128];
2027 unsigned int n, table = RT_TABLE_UNSPEC;
2028
2029 /* first try to parse table as number */
2030 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2031 table = n;
2032
2033 /* handle well known aliases */
2034 else if (!strcmp(name, "default"))
2035 table = RT_TABLE_DEFAULT;
2036 else if (!strcmp(name, "main"))
2037 table = RT_TABLE_MAIN;
2038 else if (!strcmp(name, "local"))
2039 table = RT_TABLE_LOCAL;
2040
2041 /* try to look up name in /etc/iproute2/rt_tables */
2042 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2043 {
2044 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2045 {
2046 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2047 continue;
2048
2049 n = strtoul(e, NULL, 10);
2050 e = strtok(NULL, " \t\n");
2051
2052 if (e && !strcmp(e, name))
2053 {
2054 table = n;
2055 break;
2056 }
2057 }
2058
2059 fclose(f);
2060 }
2061
2062 if (table == RT_TABLE_UNSPEC)
2063 return false;
2064
2065 *id = table;
2066 return true;
2067 }
2068
2069 bool system_is_default_rt_table(unsigned int id)
2070 {
2071 return (id == RT_TABLE_MAIN);
2072 }
2073
2074 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2075 {
2076 char *e;
2077 unsigned int n;
2078
2079 if (!strcmp(filter, "strict"))
2080 n = 1;
2081 else if (!strcmp(filter, "loose"))
2082 n = 2;
2083 else {
2084 n = strtoul(filter, &e, 0);
2085 if (*e || e == filter || n > 2)
2086 return false;
2087 }
2088
2089 *id = n;
2090 return true;
2091 }
2092
2093 static int system_iprule(struct iprule *rule, int cmd)
2094 {
2095 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2096
2097 struct nl_msg *msg;
2098 struct rtmsg rtm = {
2099 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2100 .rtm_protocol = RTPROT_STATIC,
2101 .rtm_scope = RT_SCOPE_UNIVERSE,
2102 .rtm_table = RT_TABLE_UNSPEC,
2103 .rtm_type = RTN_UNSPEC,
2104 .rtm_flags = 0,
2105 };
2106
2107 if (cmd == RTM_NEWRULE)
2108 rtm.rtm_type = RTN_UNICAST;
2109
2110 if (rule->invert)
2111 rtm.rtm_flags |= FIB_RULE_INVERT;
2112
2113 if (rule->flags & IPRULE_SRC)
2114 rtm.rtm_src_len = rule->src_mask;
2115
2116 if (rule->flags & IPRULE_DEST)
2117 rtm.rtm_dst_len = rule->dest_mask;
2118
2119 if (rule->flags & IPRULE_TOS)
2120 rtm.rtm_tos = rule->tos;
2121
2122 if (rule->flags & IPRULE_LOOKUP) {
2123 if (rule->lookup < 256)
2124 rtm.rtm_table = rule->lookup;
2125 }
2126
2127 if (rule->flags & IPRULE_ACTION)
2128 rtm.rtm_type = rule->action;
2129 else if (rule->flags & IPRULE_GOTO)
2130 rtm.rtm_type = FR_ACT_GOTO;
2131 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2132 rtm.rtm_type = FR_ACT_NOP;
2133
2134 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2135
2136 if (!msg)
2137 return -1;
2138
2139 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2140
2141 if (rule->flags & IPRULE_IN)
2142 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2143
2144 if (rule->flags & IPRULE_OUT)
2145 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2146
2147 if (rule->flags & IPRULE_SRC)
2148 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2149
2150 if (rule->flags & IPRULE_DEST)
2151 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2152
2153 if (rule->flags & IPRULE_PRIORITY)
2154 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2155 else if (cmd == RTM_NEWRULE)
2156 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2157
2158 if (rule->flags & IPRULE_FWMARK)
2159 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2160
2161 if (rule->flags & IPRULE_FWMASK)
2162 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2163
2164 if (rule->flags & IPRULE_LOOKUP) {
2165 if (rule->lookup >= 256)
2166 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2167 }
2168
2169 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2170 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2171
2172 if (rule->flags & IPRULE_GOTO)
2173 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2174
2175 return system_rtnl_call(msg);
2176 }
2177
2178 int system_add_iprule(struct iprule *rule)
2179 {
2180 return system_iprule(rule, RTM_NEWRULE);
2181 }
2182
2183 int system_del_iprule(struct iprule *rule)
2184 {
2185 return system_iprule(rule, RTM_DELRULE);
2186 }
2187
2188 int system_flush_iprules(void)
2189 {
2190 int rv = 0;
2191 struct iprule rule;
2192
2193 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2194 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2195
2196 memset(&rule, 0, sizeof(rule));
2197
2198
2199 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2200
2201 rule.priority = 0;
2202 rule.lookup = RT_TABLE_LOCAL;
2203 rv |= system_iprule(&rule, RTM_NEWRULE);
2204
2205 rule.priority = 32766;
2206 rule.lookup = RT_TABLE_MAIN;
2207 rv |= system_iprule(&rule, RTM_NEWRULE);
2208
2209 rule.priority = 32767;
2210 rule.lookup = RT_TABLE_DEFAULT;
2211 rv |= system_iprule(&rule, RTM_NEWRULE);
2212
2213
2214 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2215
2216 rule.priority = 0;
2217 rule.lookup = RT_TABLE_LOCAL;
2218 rv |= system_iprule(&rule, RTM_NEWRULE);
2219
2220 rule.priority = 32766;
2221 rule.lookup = RT_TABLE_MAIN;
2222 rv |= system_iprule(&rule, RTM_NEWRULE);
2223
2224 return rv;
2225 }
2226
2227 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2228 {
2229 return system_rtn_aton(action, id);
2230 }
2231
2232 time_t system_get_rtime(void)
2233 {
2234 struct timespec ts;
2235 struct timeval tv;
2236
2237 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2238 return ts.tv_sec;
2239
2240 if (gettimeofday(&tv, NULL) == 0)
2241 return tv.tv_sec;
2242
2243 return 0;
2244 }
2245
2246 #ifndef IP_DF
2247 #define IP_DF 0x4000
2248 #endif
2249
2250 static int tunnel_ioctl(const char *name, int cmd, void *p)
2251 {
2252 struct ifreq ifr;
2253
2254 memset(&ifr, 0, sizeof(ifr));
2255 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2256 ifr.ifr_ifru.ifru_data = p;
2257 return ioctl(sock_ioctl, cmd, &ifr);
2258 }
2259
2260 #ifdef IFLA_IPTUN_MAX
2261 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2262 struct blob_attr **tb)
2263 {
2264 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2265 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2266 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2267 struct blob_attr *cur;
2268 int ret = 0, ttl = 0;
2269
2270 if (!nlm)
2271 return -1;
2272
2273 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2274 nla_put_string(nlm, IFLA_IFNAME, name);
2275
2276 if (link)
2277 nla_put_u32(nlm, IFLA_LINK, link);
2278
2279 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2280 if (!linkinfo) {
2281 ret = -ENOMEM;
2282 goto failure;
2283 }
2284
2285 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2286 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2287 if (!infodata) {
2288 ret = -ENOMEM;
2289 goto failure;
2290 }
2291
2292 if (link)
2293 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2294
2295 if ((cur = tb[TUNNEL_ATTR_TTL]))
2296 ttl = blobmsg_get_u32(cur);
2297
2298 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2299 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2300 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2301
2302 struct in6_addr in6buf;
2303 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2304 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2305 ret = -EINVAL;
2306 goto failure;
2307 }
2308 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2309 }
2310
2311 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2312 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2313 ret = -EINVAL;
2314 goto failure;
2315 }
2316 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2317 }
2318
2319 #ifdef IFLA_IPTUN_FMR_MAX
2320 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2321 struct blob_attr *dcur;
2322 unsigned drem, fmrcnt = 0;
2323 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2324
2325 if (!fmrs) {
2326 ret = -ENOMEM;
2327 goto failure;
2328 }
2329
2330 blobmsg_for_each_attr(dcur, cur, drem) {
2331 if (blobmsg_type(dcur) != BLOBMSG_TYPE_ARRAY ||
2332 strcmp(blobmsg_name(dcur), "fmrs") ||
2333 blobmsg_check_array(dcur, BLOBMSG_TYPE_UNSPEC) <= 0)
2334 continue;
2335
2336 struct blob_attr *rcur;
2337 unsigned rrem;
2338 blobmsg_for_each_attr(rcur, dcur, rrem) {
2339 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2340 struct in6_addr ip6prefix;
2341 struct in_addr ip4prefix;
2342 unsigned ip4len, ip6len, ealen, offset;
2343
2344 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2345 blobmsg_data(rcur), blobmsg_len(rcur));
2346
2347 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2348 !parse_ip_and_netmask(AF_INET6,
2349 blobmsg_data(tb_cur), &ip6prefix,
2350 &ip6len)) {
2351 ret = -EINVAL;
2352 goto failure;
2353 }
2354
2355 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2356 !parse_ip_and_netmask(AF_INET,
2357 blobmsg_data(tb_cur), &ip4prefix,
2358 &ip4len)) {
2359 ret = -EINVAL;
2360 goto failure;
2361 }
2362
2363 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2364 ret = -EINVAL;
2365 goto failure;
2366 }
2367 ealen = blobmsg_get_u32(tb_cur);
2368
2369 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2370 ret = -EINVAL;
2371 goto failure;
2372 }
2373 offset = blobmsg_get_u32(tb_cur);
2374
2375 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2376 if (!rule) {
2377 ret = -ENOMEM;
2378 goto failure;
2379 }
2380
2381 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2382 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2383 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2384 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2385 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2386 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2387
2388 nla_nest_end(nlm, rule);
2389 }
2390 }
2391 nla_nest_end(nlm, fmrs);
2392 }
2393 #endif
2394
2395 nla_nest_end(nlm, infodata);
2396 nla_nest_end(nlm, linkinfo);
2397
2398 return system_rtnl_call(nlm);
2399
2400 failure:
2401 nlmsg_free(nlm);
2402 return ret;
2403 }
2404 #endif
2405
2406 #ifdef IFLA_IPTUN_MAX
2407 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2408 static int system_add_gre_tunnel(const char *name, const char *kind,
2409 const unsigned int link, struct blob_attr **tb, bool v6)
2410 {
2411 struct nl_msg *nlm;
2412 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2413 struct blob_attr *cur;
2414 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2415 uint16_t iflags = 0, oflags = 0;
2416 uint8_t tos = 0;
2417 int ret = 0, ttl = 0;
2418
2419 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2420 if (!nlm)
2421 return -1;
2422
2423 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2424 nla_put_string(nlm, IFLA_IFNAME, name);
2425
2426 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2427 if (!linkinfo) {
2428 ret = -ENOMEM;
2429 goto failure;
2430 }
2431
2432 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2433 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2434 if (!infodata) {
2435 ret = -ENOMEM;
2436 goto failure;
2437 }
2438
2439 if (link)
2440 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2441
2442 if ((cur = tb[TUNNEL_ATTR_TTL]))
2443 ttl = blobmsg_get_u32(cur);
2444
2445 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2446 char *str = blobmsg_get_string(cur);
2447 if (strcmp(str, "inherit")) {
2448 unsigned uval;
2449
2450 if (!system_tos_aton(str, &uval)) {
2451 ret = -EINVAL;
2452 goto failure;
2453 }
2454
2455 if (v6)
2456 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2457 else
2458 tos = uval;
2459 } else {
2460 if (v6)
2461 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2462 else
2463 tos = 1;
2464 }
2465 }
2466
2467 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2468 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2469
2470 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2471 blobmsg_data(cur), blobmsg_len(cur));
2472
2473 if ((cur = tb_data[GRE_DATA_IKEY])) {
2474 if ((ikey = blobmsg_get_u32(cur)))
2475 iflags |= GRE_KEY;
2476 }
2477
2478 if ((cur = tb_data[GRE_DATA_OKEY])) {
2479 if ((okey = blobmsg_get_u32(cur)))
2480 oflags |= GRE_KEY;
2481 }
2482
2483 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2484 if (blobmsg_get_bool(cur))
2485 iflags |= GRE_CSUM;
2486 }
2487
2488 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2489 if (blobmsg_get_bool(cur))
2490 oflags |= GRE_CSUM;
2491 }
2492
2493 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2494 if (blobmsg_get_bool(cur))
2495 iflags |= GRE_SEQ;
2496 }
2497
2498 if ((cur = tb[GRE_DATA_OSEQNO])) {
2499 if (blobmsg_get_bool(cur))
2500 oflags |= GRE_SEQ;
2501 }
2502 }
2503
2504 if (v6) {
2505 struct in6_addr in6buf;
2506 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2507 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2508 ret = -EINVAL;
2509 goto failure;
2510 }
2511 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2512 }
2513
2514 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2515 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2516 ret = -EINVAL;
2517 goto failure;
2518 }
2519 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2520 }
2521 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2522
2523 if (flowinfo)
2524 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2525
2526 if (flags)
2527 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2528
2529 if (!ttl)
2530 ttl = 64;
2531 } else {
2532 struct in_addr inbuf;
2533 bool set_df = true;
2534
2535 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2536 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2537 ret = -EINVAL;
2538 goto failure;
2539 }
2540 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2541 }
2542
2543 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2544 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2545 ret = -EINVAL;
2546 goto failure;
2547 }
2548 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2549
2550 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2551 if (!okey) {
2552 okey = inbuf.s_addr;
2553 oflags |= GRE_KEY;
2554 }
2555
2556 if (!ikey) {
2557 ikey = inbuf.s_addr;
2558 iflags |= GRE_KEY;
2559 }
2560 }
2561 }
2562
2563 if ((cur = tb[TUNNEL_ATTR_DF]))
2564 set_df = blobmsg_get_bool(cur);
2565
2566 if (!set_df) {
2567 /* ttl != 0 and nopmtudisc are incompatible */
2568 if (ttl) {
2569 ret = -EINVAL;
2570 goto failure;
2571 }
2572 } else if (!ttl)
2573 ttl = 64;
2574
2575 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2576
2577 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2578 }
2579
2580 if (ttl)
2581 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2582
2583 if (oflags)
2584 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2585
2586 if (iflags)
2587 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2588
2589 if (okey)
2590 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2591
2592 if (ikey)
2593 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2594
2595 nla_nest_end(nlm, infodata);
2596 nla_nest_end(nlm, linkinfo);
2597
2598 return system_rtnl_call(nlm);
2599
2600 failure:
2601 nlmsg_free(nlm);
2602 return ret;
2603 }
2604 #endif
2605
2606 #ifdef IFLA_VTI_MAX
2607 static int system_add_vti_tunnel(const char *name, const char *kind,
2608 const unsigned int link, struct blob_attr **tb, bool v6)
2609 {
2610 struct nl_msg *nlm;
2611 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2612 struct blob_attr *cur;
2613 int ret = 0;
2614
2615 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2616 if (!nlm)
2617 return -1;
2618
2619 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2620 nla_put_string(nlm, IFLA_IFNAME, name);
2621
2622 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2623 if (!linkinfo) {
2624 ret = -ENOMEM;
2625 goto failure;
2626 }
2627
2628 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2629 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2630 if (!infodata) {
2631 ret = -ENOMEM;
2632 goto failure;
2633 }
2634
2635 if (link)
2636 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2637
2638 if (v6) {
2639 struct in6_addr in6buf;
2640 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2641 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2642 ret = -EINVAL;
2643 goto failure;
2644 }
2645 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2646 }
2647
2648 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2649 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2650 ret = -EINVAL;
2651 goto failure;
2652 }
2653 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2654 }
2655
2656 } else {
2657 struct in_addr inbuf;
2658
2659 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2660 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2661 ret = -EINVAL;
2662 goto failure;
2663 }
2664 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2665 }
2666
2667 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2668 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2669 ret = -EINVAL;
2670 goto failure;
2671 }
2672 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2673 }
2674
2675 }
2676
2677 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2678 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2679 uint32_t ikey = 0, okey = 0;
2680
2681 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2682 blobmsg_data(cur), blobmsg_len(cur));
2683
2684 if ((cur = tb_data[VTI_DATA_IKEY])) {
2685 if ((ikey = blobmsg_get_u32(cur)))
2686 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2687 }
2688
2689 if ((cur = tb_data[VTI_DATA_OKEY])) {
2690 if ((okey = blobmsg_get_u32(cur)))
2691 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2692 }
2693 }
2694
2695 nla_nest_end(nlm, infodata);
2696 nla_nest_end(nlm, linkinfo);
2697
2698 return system_rtnl_call(nlm);
2699
2700 failure:
2701 nlmsg_free(nlm);
2702 return ret;
2703 }
2704 #endif
2705
2706 #ifdef IFLA_VXLAN_MAX
2707 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2708 {
2709 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2710 struct nl_msg *msg;
2711 struct nlattr *linkinfo, *data;
2712 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2713 struct blob_attr *cur;
2714 int ret = 0;
2715
2716 if ((cur = tb[TUNNEL_ATTR_DATA]))
2717 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2718 blobmsg_data(cur), blobmsg_len(cur));
2719 else
2720 return -EINVAL;
2721
2722 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2723
2724 if (!msg)
2725 return -1;
2726
2727 nlmsg_append(msg, &iim, sizeof(iim), 0);
2728
2729 nla_put_string(msg, IFLA_IFNAME, name);
2730
2731 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2732 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2733 if (!ea) {
2734 ret = -EINVAL;
2735 goto failure;
2736 }
2737
2738 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2739 }
2740
2741 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2742 uint32_t mtu = blobmsg_get_u32(cur);
2743 nla_put_u32(msg, IFLA_MTU, mtu);
2744 }
2745
2746 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2747 ret = -ENOMEM;
2748 goto failure;
2749 }
2750
2751 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2752
2753 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2754 ret = -ENOMEM;
2755 goto failure;
2756 }
2757
2758 if (link)
2759 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2760
2761 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2762 uint32_t id = blobmsg_get_u32(cur);
2763 if (id >= (1u << 24) - 1) {
2764 ret = -EINVAL;
2765 goto failure;
2766 }
2767
2768 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2769 }
2770
2771 if (v6) {
2772 struct in6_addr in6buf;
2773 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2774 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2775 ret = -EINVAL;
2776 goto failure;
2777 }
2778 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2779 }
2780
2781 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2782 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2783 ret = -EINVAL;
2784 goto failure;
2785 }
2786 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2787 }
2788 } else {
2789 struct in_addr inbuf;
2790
2791 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2792 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2793 ret = -EINVAL;
2794 goto failure;
2795 }
2796 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2797 }
2798
2799 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2800 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2801 ret = -EINVAL;
2802 goto failure;
2803 }
2804 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2805 }
2806 }
2807
2808 uint32_t port = 4789;
2809 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2810 port = blobmsg_get_u32(cur);
2811 if (port < 1 || port > 65535) {
2812 ret = -EINVAL;
2813 goto failure;
2814 }
2815 }
2816 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2817
2818 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2819 bool rxcsum = blobmsg_get_bool(cur);
2820 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2821 }
2822
2823 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
2824 bool txcsum = blobmsg_get_bool(cur);
2825 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
2826 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
2827 }
2828
2829 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2830 char *str = blobmsg_get_string(cur);
2831 unsigned tos = 1;
2832
2833 if (strcmp(str, "inherit")) {
2834 if (!system_tos_aton(str, &tos)) {
2835 ret = -EINVAL;
2836 goto failure;
2837 }
2838 }
2839
2840 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2841 }
2842
2843 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2844 uint32_t ttl = blobmsg_get_u32(cur);
2845 if (ttl < 1 || ttl > 255) {
2846 ret = -EINVAL;
2847 goto failure;
2848 }
2849
2850 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2851 }
2852
2853 nla_nest_end(msg, data);
2854 nla_nest_end(msg, linkinfo);
2855
2856 ret = system_rtnl_call(msg);
2857 if (ret)
2858 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2859
2860 return ret;
2861
2862 failure:
2863 nlmsg_free(msg);
2864 return ret;
2865 }
2866 #endif
2867
2868 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2869 {
2870 struct blob_attr *cur;
2871 int ret = 0;
2872
2873 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2874 return -1;
2875
2876 #ifdef SIOCADD6RD
2877 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2878 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2879 unsigned int mask;
2880 struct ip_tunnel_6rd p6;
2881
2882 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2883 blobmsg_data(cur), blobmsg_len(cur));
2884
2885 memset(&p6, 0, sizeof(p6));
2886
2887 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2888 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2889 &p6.prefix, &mask) || mask > 128) {
2890 ret = -EINVAL;
2891 goto failure;
2892 }
2893
2894 p6.prefixlen = mask;
2895 }
2896
2897 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2898 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2899 &p6.relay_prefix, &mask) || mask > 32) {
2900 ret = -EINVAL;
2901 goto failure;
2902 }
2903
2904 p6.relay_prefixlen = mask;
2905 }
2906
2907 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2908 ret = -1;
2909 goto failure;
2910 }
2911 }
2912 #endif
2913
2914 return ret;
2915
2916 failure:
2917 __system_del_ip_tunnel(name, tb);
2918 return ret;
2919 }
2920
2921 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2922 {
2923 struct blob_attr *cur;
2924 bool set_df = true;
2925 struct ip_tunnel_parm p = {
2926 .link = link,
2927 .iph = {
2928 .version = 4,
2929 .ihl = 5,
2930 .protocol = proto,
2931 }
2932 };
2933
2934 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2935 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2936 return -EINVAL;
2937
2938 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2939 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2940 return -EINVAL;
2941
2942 if ((cur = tb[TUNNEL_ATTR_DF]))
2943 set_df = blobmsg_get_bool(cur);
2944
2945 if ((cur = tb[TUNNEL_ATTR_TTL]))
2946 p.iph.ttl = blobmsg_get_u32(cur);
2947
2948 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2949 char *str = blobmsg_get_string(cur);
2950 if (strcmp(str, "inherit")) {
2951 unsigned uval;
2952
2953 if (!system_tos_aton(str, &uval))
2954 return -EINVAL;
2955
2956 p.iph.tos = uval;
2957 } else
2958 p.iph.tos = 1;
2959 }
2960
2961 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2962 /* ttl !=0 and nopmtudisc are incompatible */
2963 if (p.iph.ttl && p.iph.frag_off == 0)
2964 return -EINVAL;
2965
2966 strncpy(p.name, name, sizeof(p.name));
2967
2968 switch (p.iph.protocol) {
2969 case IPPROTO_IPIP:
2970 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2971 case IPPROTO_IPV6:
2972 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2973 default:
2974 break;
2975 }
2976 return -1;
2977 }
2978
2979 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2980 {
2981 struct blob_attr *cur;
2982 const char *str;
2983
2984 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2985 return -EINVAL;
2986 str = blobmsg_data(cur);
2987
2988 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2989 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2990 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2991 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2992 return system_link_del(name);
2993 else
2994 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2995 }
2996
2997 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2998 {
2999 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3000
3001 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3002 blob_data(attr), blob_len(attr));
3003
3004 return __system_del_ip_tunnel(name, tb);
3005 }
3006
3007 int system_update_ipv6_mtu(struct device *dev, int mtu)
3008 {
3009 int ret = -1;
3010 char buf[64];
3011 int fd;
3012
3013 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3014 dev->ifname);
3015
3016 fd = open(buf, O_RDWR);
3017 if (fd < 0)
3018 return ret;
3019
3020 if (!mtu) {
3021 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3022 if (len < 0)
3023 goto out;
3024
3025 buf[len] = 0;
3026 ret = atoi(buf);
3027 } else {
3028 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3029 ret = mtu;
3030 }
3031
3032 out:
3033 close(fd);
3034 return ret;
3035 }
3036
3037 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3038 {
3039 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3040 struct blob_attr *cur;
3041 const char *str;
3042
3043 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3044 blob_data(attr), blob_len(attr));
3045
3046 __system_del_ip_tunnel(name, tb);
3047
3048 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3049 return -EINVAL;
3050 str = blobmsg_data(cur);
3051
3052 unsigned int ttl = 0;
3053 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3054 ttl = blobmsg_get_u32(cur);
3055 if (ttl > 255)
3056 return -EINVAL;
3057 }
3058
3059 unsigned int link = 0;
3060 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3061 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3062 if (!iface)
3063 return -EINVAL;
3064
3065 if (iface->l3_dev.dev)
3066 link = iface->l3_dev.dev->ifindex;
3067 }
3068
3069 if (!strcmp(str, "sit"))
3070 return system_add_sit_tunnel(name, link, tb);
3071 #ifdef IFLA_IPTUN_MAX
3072 else if (!strcmp(str, "ipip6")) {
3073 return system_add_ip6_tunnel(name, link, tb);
3074 } else if (!strcmp(str, "greip")) {
3075 return system_add_gre_tunnel(name, "gre", link, tb, false);
3076 } else if (!strcmp(str, "gretapip")) {
3077 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3078 } else if (!strcmp(str, "greip6")) {
3079 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3080 } else if (!strcmp(str, "gretapip6")) {
3081 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3082 #ifdef IFLA_VTI_MAX
3083 } else if (!strcmp(str, "vtiip")) {
3084 return system_add_vti_tunnel(name, "vti", link, tb, false);
3085 } else if (!strcmp(str, "vtiip6")) {
3086 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3087 #endif
3088 #ifdef IFLA_VXLAN_MAX
3089 } else if(!strcmp(str, "vxlan")) {
3090 return system_add_vxlan(name, link, tb, false);
3091 } else if(!strcmp(str, "vxlan6")) {
3092 return system_add_vxlan(name, link, tb, true);
3093 #endif
3094 #endif
3095 } else if (!strcmp(str, "ipip")) {
3096 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3097 }
3098 else
3099 return -EINVAL;
3100
3101 return 0;
3102 }
OpenWrt Network interface configuration daemon