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system-linux: check ioctl return value in system_if_flags()
[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 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
785 return -1;
786
787 ifr.ifr_flags |= add;
788 ifr.ifr_flags &= ~rem;
789 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
790 }
791
792 struct clear_data {
793 struct nl_msg *msg;
794 struct device *dev;
795 int type;
796 int size;
797 int af;
798 };
799
800
801 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
802 {
803 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
804
805 return ifa->ifa_index == ifindex;
806 }
807
808 static bool check_route(struct nlmsghdr *hdr, int ifindex)
809 {
810 struct rtmsg *r = NLMSG_DATA(hdr);
811 struct nlattr *tb[__RTA_MAX];
812
813 if (r->rtm_protocol == RTPROT_KERNEL &&
814 r->rtm_family == AF_INET6)
815 return false;
816
817 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
818 if (!tb[RTA_OIF])
819 return false;
820
821 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
822 }
823
824 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
825 {
826 return true;
827 }
828
829 static int cb_clear_event(struct nl_msg *msg, void *arg)
830 {
831 struct clear_data *clr = arg;
832 struct nlmsghdr *hdr = nlmsg_hdr(msg);
833 bool (*cb)(struct nlmsghdr *, int ifindex);
834 int type;
835
836 switch(clr->type) {
837 case RTM_GETADDR:
838 type = RTM_DELADDR;
839 if (hdr->nlmsg_type != RTM_NEWADDR)
840 return NL_SKIP;
841
842 cb = check_ifaddr;
843 break;
844 case RTM_GETROUTE:
845 type = RTM_DELROUTE;
846 if (hdr->nlmsg_type != RTM_NEWROUTE)
847 return NL_SKIP;
848
849 cb = check_route;
850 break;
851 case RTM_GETRULE:
852 type = RTM_DELRULE;
853 if (hdr->nlmsg_type != RTM_NEWRULE)
854 return NL_SKIP;
855
856 cb = check_rule;
857 break;
858 default:
859 return NL_SKIP;
860 }
861
862 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
863 return NL_SKIP;
864
865 if (type == RTM_DELRULE)
866 D(SYSTEM, "Remove a rule\n");
867 else
868 D(SYSTEM, "Remove %s from device %s\n",
869 type == RTM_DELADDR ? "an address" : "a route",
870 clr->dev->ifname);
871 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
872 hdr = nlmsg_hdr(clr->msg);
873 hdr->nlmsg_type = type;
874 hdr->nlmsg_flags = NLM_F_REQUEST;
875
876 nl_socket_disable_auto_ack(sock_rtnl);
877 nl_send_auto_complete(sock_rtnl, clr->msg);
878 nl_socket_enable_auto_ack(sock_rtnl);
879
880 return NL_SKIP;
881 }
882
883 static int
884 cb_finish_event(struct nl_msg *msg, void *arg)
885 {
886 int *pending = arg;
887 *pending = 0;
888 return NL_STOP;
889 }
890
891 static int
892 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
893 {
894 int *pending = arg;
895 *pending = err->error;
896 return NL_STOP;
897 }
898
899 static void
900 system_if_clear_entries(struct device *dev, int type, int af)
901 {
902 struct clear_data clr;
903 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
904 struct rtmsg rtm = {
905 .rtm_family = af,
906 .rtm_flags = RTM_F_CLONED,
907 };
908 int flags = NLM_F_DUMP;
909 int pending = 1;
910
911 clr.af = af;
912 clr.dev = dev;
913 clr.type = type;
914 switch (type) {
915 case RTM_GETADDR:
916 case RTM_GETRULE:
917 clr.size = sizeof(struct rtgenmsg);
918 break;
919 case RTM_GETROUTE:
920 clr.size = sizeof(struct rtmsg);
921 break;
922 default:
923 return;
924 }
925
926 if (!cb)
927 return;
928
929 clr.msg = nlmsg_alloc_simple(type, flags);
930 if (!clr.msg)
931 goto out;
932
933 nlmsg_append(clr.msg, &rtm, clr.size, 0);
934 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
935 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
936 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
937
938 nl_send_auto_complete(sock_rtnl, clr.msg);
939 while (pending > 0)
940 nl_recvmsgs(sock_rtnl, cb);
941
942 nlmsg_free(clr.msg);
943 out:
944 nl_cb_put(cb);
945 }
946
947 /*
948 * Clear bridge (membership) state and bring down device
949 */
950 void system_if_clear_state(struct device *dev)
951 {
952 static char buf[256];
953 char *bridge;
954
955 device_set_ifindex(dev, system_if_resolve(dev));
956 if (dev->external || !dev->ifindex)
957 return;
958
959 system_if_flags(dev->ifname, 0, IFF_UP);
960
961 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
962 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
963 system_bridge_delbr(dev);
964 return;
965 }
966
967 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
968 if (bridge) {
969 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
970 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
971 }
972
973 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
974 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
975 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
976 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
977 system_set_disable_ipv6(dev, "0");
978 }
979
980 static inline unsigned long
981 sec_to_jiffies(int val)
982 {
983 return (unsigned long) val * 100;
984 }
985
986 static void system_bridge_conf_multicast_deps(struct device *bridge,
987 struct bridge_config *cfg,
988 char *buf,
989 int buf_len)
990 {
991 int val;
992
993 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
994 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
995 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
996 val = cfg->robustness * cfg->query_interval +
997 cfg->query_response_interval;
998
999 snprintf(buf, buf_len, "%i", val);
1000 system_bridge_set_membership_interval(bridge, buf);
1001
1002 val = cfg->robustness * cfg->query_interval +
1003 cfg->query_response_interval / 2;
1004
1005 snprintf(buf, buf_len, "%i", val);
1006 system_bridge_set_other_querier_timeout(bridge, buf);
1007 }
1008
1009 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1010 val = cfg->query_interval / 4;
1011
1012 snprintf(buf, buf_len, "%i", val);
1013 system_bridge_set_startup_query_interval(bridge, buf);
1014 }
1015 }
1016
1017 static void system_bridge_conf_multicast(struct device *bridge,
1018 struct bridge_config *cfg,
1019 char *buf,
1020 int buf_len)
1021 {
1022 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1023 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1024
1025 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1026 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1027
1028 snprintf(buf, buf_len, "%i", cfg->hash_max);
1029 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1030 bridge->ifname, buf);
1031
1032 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1033 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1034 system_bridge_set_multicast_router(bridge, buf, true);
1035 }
1036
1037 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1038 snprintf(buf, buf_len, "%i", cfg->robustness);
1039 system_bridge_set_robustness(bridge, buf);
1040 }
1041
1042 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1043 snprintf(buf, buf_len, "%i", cfg->query_interval);
1044 system_bridge_set_query_interval(bridge, buf);
1045 }
1046
1047 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1048 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1049 system_bridge_set_query_response_interval(bridge, buf);
1050 }
1051
1052 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1053 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1054 system_bridge_set_last_member_interval(bridge, buf);
1055 }
1056
1057 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1058 }
1059
1060 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1061 {
1062 char buf[64];
1063 unsigned long args[4] = {};
1064
1065 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1066 return -1;
1067
1068 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1069 args[1] = !!cfg->stp;
1070 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1071
1072 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1073 args[1] = sec_to_jiffies(cfg->forward_delay);
1074 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1075
1076 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1077
1078 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1079 args[1] = cfg->priority;
1080 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1081
1082 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1083 args[0] = BRCTL_SET_AGEING_TIME;
1084 args[1] = sec_to_jiffies(cfg->ageing_time);
1085 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1086 }
1087
1088 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1089 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1090 args[1] = sec_to_jiffies(cfg->hello_time);
1091 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1092 }
1093
1094 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1095 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1096 args[1] = sec_to_jiffies(cfg->max_age);
1097 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1098 }
1099
1100 return 0;
1101 }
1102
1103 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1104 {
1105 struct nl_msg *msg;
1106 struct nlattr *linkinfo, *data;
1107 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1108 int i, rv;
1109 static const struct {
1110 const char *name;
1111 enum macvlan_mode val;
1112 } modes[] = {
1113 { "private", MACVLAN_MODE_PRIVATE },
1114 { "vepa", MACVLAN_MODE_VEPA },
1115 { "bridge", MACVLAN_MODE_BRIDGE },
1116 { "passthru", MACVLAN_MODE_PASSTHRU },
1117 };
1118
1119 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1120
1121 if (!msg)
1122 return -1;
1123
1124 nlmsg_append(msg, &iim, sizeof(iim), 0);
1125
1126 if (cfg->flags & MACVLAN_OPT_MACADDR)
1127 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1128 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1129 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1130
1131 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1132 goto nla_put_failure;
1133
1134 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1135
1136 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1137 goto nla_put_failure;
1138
1139 if (cfg->mode) {
1140 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1141 if (strcmp(cfg->mode, modes[i].name) != 0)
1142 continue;
1143
1144 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1145 break;
1146 }
1147 }
1148
1149 nla_nest_end(msg, data);
1150 nla_nest_end(msg, linkinfo);
1151
1152 rv = system_rtnl_call(msg);
1153 if (rv)
1154 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1155
1156 return rv;
1157
1158 nla_put_failure:
1159 nlmsg_free(msg);
1160 return -ENOMEM;
1161 }
1162
1163 static int system_link_del(const char *ifname)
1164 {
1165 struct nl_msg *msg;
1166 struct ifinfomsg iim = {
1167 .ifi_family = AF_UNSPEC,
1168 .ifi_index = 0,
1169 };
1170
1171 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1172
1173 if (!msg)
1174 return -1;
1175
1176 nlmsg_append(msg, &iim, sizeof(iim), 0);
1177 nla_put_string(msg, IFLA_IFNAME, ifname);
1178 return system_rtnl_call(msg);
1179 }
1180
1181 int system_macvlan_del(struct device *macvlan)
1182 {
1183 return system_link_del(macvlan->ifname);
1184 }
1185
1186 int system_veth_add(struct device *veth, struct veth_config *cfg)
1187 {
1188 struct nl_msg *msg;
1189 struct ifinfomsg empty_iim = {};
1190 struct nlattr *linkinfo, *data, *veth_info;
1191 int rv;
1192
1193 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1194
1195 if (!msg)
1196 return -1;
1197
1198 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1199
1200 if (cfg->flags & VETH_OPT_MACADDR)
1201 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1202 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1203
1204 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1205 goto nla_put_failure;
1206
1207 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1208
1209 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1210 goto nla_put_failure;
1211
1212 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1213 goto nla_put_failure;
1214
1215 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1216
1217 if (cfg->flags & VETH_OPT_PEER_NAME)
1218 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1219 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1220 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1221
1222 nla_nest_end(msg, veth_info);
1223 nla_nest_end(msg, data);
1224 nla_nest_end(msg, linkinfo);
1225
1226 rv = system_rtnl_call(msg);
1227 if (rv) {
1228 if (cfg->flags & VETH_OPT_PEER_NAME)
1229 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1230 else
1231 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1232 }
1233
1234 return rv;
1235
1236 nla_put_failure:
1237 nlmsg_free(msg);
1238 return -ENOMEM;
1239 }
1240
1241 int system_veth_del(struct device *veth)
1242 {
1243 return system_link_del(veth->ifname);
1244 }
1245
1246 static int system_vlan(struct device *dev, int id)
1247 {
1248 struct vlan_ioctl_args ifr = {
1249 .cmd = SET_VLAN_NAME_TYPE_CMD,
1250 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1251 };
1252
1253 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1254
1255 if (id < 0) {
1256 ifr.cmd = DEL_VLAN_CMD;
1257 ifr.u.VID = 0;
1258 } else {
1259 ifr.cmd = ADD_VLAN_CMD;
1260 ifr.u.VID = id;
1261 }
1262 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1263 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1264 }
1265
1266 int system_vlan_add(struct device *dev, int id)
1267 {
1268 return system_vlan(dev, id);
1269 }
1270
1271 int system_vlan_del(struct device *dev)
1272 {
1273 return system_vlan(dev, -1);
1274 }
1275
1276 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1277 {
1278 struct nl_msg *msg;
1279 struct nlattr *linkinfo, *data;
1280 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1281 int rv;
1282
1283 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1284
1285 if (!msg)
1286 return -1;
1287
1288 nlmsg_append(msg, &iim, sizeof(iim), 0);
1289 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1290 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1291
1292 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1293 goto nla_put_failure;
1294
1295 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1296
1297 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1298 goto nla_put_failure;
1299
1300 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1301
1302 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1303 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1304 #else
1305 if(cfg->proto == VLAN_PROTO_8021AD)
1306 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);
1307 #endif
1308
1309 nla_nest_end(msg, data);
1310 nla_nest_end(msg, linkinfo);
1311
1312 rv = system_rtnl_call(msg);
1313 if (rv)
1314 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1315
1316 return rv;
1317
1318 nla_put_failure:
1319 nlmsg_free(msg);
1320 return -ENOMEM;
1321 }
1322
1323 int system_vlandev_del(struct device *vlandev)
1324 {
1325 return system_link_del(vlandev->ifname);
1326 }
1327
1328 void
1329 system_if_get_settings(struct device *dev, struct device_settings *s)
1330 {
1331 struct ifreq ifr;
1332 char buf[10];
1333
1334 memset(&ifr, 0, sizeof(ifr));
1335 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1336
1337 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1338 s->mtu = ifr.ifr_mtu;
1339 s->flags |= DEV_OPT_MTU;
1340 }
1341
1342 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1343 if (s->mtu6 > 0)
1344 s->flags |= DEV_OPT_MTU6;
1345
1346 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1347 s->txqueuelen = ifr.ifr_qlen;
1348 s->flags |= DEV_OPT_TXQUEUELEN;
1349 }
1350
1351 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1352 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1353 s->flags |= DEV_OPT_MACADDR;
1354 }
1355
1356 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1357 s->ipv6 = !strtoul(buf, NULL, 0);
1358 s->flags |= DEV_OPT_IPV6;
1359 }
1360
1361 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1362 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1363 s->flags |= DEV_OPT_PROMISC;
1364
1365 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1366 s->flags |= DEV_OPT_MULTICAST;
1367 }
1368
1369 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1370 s->rpfilter = strtoul(buf, NULL, 0);
1371 s->flags |= DEV_OPT_RPFILTER;
1372 }
1373
1374 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1375 s->acceptlocal = strtoul(buf, NULL, 0);
1376 s->flags |= DEV_OPT_ACCEPTLOCAL;
1377 }
1378
1379 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1380 s->igmpversion = strtoul(buf, NULL, 0);
1381 s->flags |= DEV_OPT_IGMPVERSION;
1382 }
1383
1384 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1385 s->mldversion = strtoul(buf, NULL, 0);
1386 s->flags |= DEV_OPT_MLDVERSION;
1387 }
1388
1389 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1390 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1391 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1392 }
1393
1394 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1395 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1396 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1397 }
1398
1399 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1400 s->neigh4locktime = strtol(buf, NULL, 0);
1401 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1402 }
1403
1404 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1405 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1406 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1407 }
1408
1409 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1410 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1411 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1412 }
1413
1414 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1415 s->dadtransmits = strtoul(buf, NULL, 0);
1416 s->flags |= DEV_OPT_DADTRANSMITS;
1417 }
1418
1419 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1420 s->sendredirects = strtoul(buf, NULL, 0);
1421 s->flags |= DEV_OPT_SENDREDIRECTS;
1422 }
1423 }
1424
1425 void
1426 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1427 {
1428 struct ifreq ifr;
1429 char buf[12];
1430
1431 memset(&ifr, 0, sizeof(ifr));
1432 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1433 if (s->flags & DEV_OPT_MTU & apply_mask) {
1434 ifr.ifr_mtu = s->mtu;
1435 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1436 s->flags &= ~DEV_OPT_MTU;
1437 }
1438 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1439 system_update_ipv6_mtu(dev, s->mtu6);
1440 }
1441 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1442 ifr.ifr_qlen = s->txqueuelen;
1443 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1444 s->flags &= ~DEV_OPT_TXQUEUELEN;
1445 }
1446 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1447 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1448 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1449 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1450 s->flags &= ~DEV_OPT_MACADDR;
1451 }
1452 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1453 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1454 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1455 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1456 !s->promisc ? IFF_PROMISC : 0) < 0)
1457 s->flags &= ~DEV_OPT_PROMISC;
1458 }
1459 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1460 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1461 system_set_rpfilter(dev, buf);
1462 }
1463 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1464 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1465 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1466 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1467 system_set_igmpversion(dev, buf);
1468 }
1469 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1470 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1471 system_set_mldversion(dev, buf);
1472 }
1473 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1474 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1475 system_set_neigh4reachabletime(dev, buf);
1476 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1477 system_set_neigh6reachabletime(dev, buf);
1478 }
1479 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1480 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1481 system_set_neigh4locktime(dev, buf);
1482 }
1483 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1484 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1485 system_set_neigh4gcstaletime(dev, buf);
1486 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1487 system_set_neigh6gcstaletime(dev, buf);
1488 }
1489 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1490 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1491 system_set_dadtransmits(dev, buf);
1492 }
1493 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1494 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1495 !s->multicast ? IFF_MULTICAST : 0) < 0)
1496 s->flags &= ~DEV_OPT_MULTICAST;
1497 }
1498 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1499 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1500 }
1501
1502 int system_if_up(struct device *dev)
1503 {
1504 system_if_get_settings(dev, &dev->orig_settings);
1505 /* Only keep orig settings based on what needs to be set */
1506 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1507 dev->orig_settings.flags &= dev->settings.flags;
1508 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1509 return system_if_flags(dev->ifname, IFF_UP, 0);
1510 }
1511
1512 int system_if_down(struct device *dev)
1513 {
1514 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1515 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1516 return ret;
1517 }
1518
1519 struct if_check_data {
1520 struct device *dev;
1521 int pending;
1522 int ret;
1523 };
1524
1525 #ifndef IFF_LOWER_UP
1526 #define IFF_LOWER_UP 0x10000
1527 #endif
1528
1529 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1530 {
1531 struct nlmsghdr *nh = nlmsg_hdr(msg);
1532 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1533 struct if_check_data *chk = (struct if_check_data *)arg;
1534
1535 if (nh->nlmsg_type != RTM_NEWLINK)
1536 return NL_SKIP;
1537
1538 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1539 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1540
1541 return NL_OK;
1542 }
1543
1544 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1545 {
1546 struct if_check_data *chk = (struct if_check_data *)arg;
1547 chk->pending = 0;
1548 return NL_STOP;
1549 }
1550
1551 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1552 {
1553 struct if_check_data *chk = (struct if_check_data *)arg;
1554
1555 device_set_present(chk->dev, false);
1556 device_set_link(chk->dev, false);
1557 chk->pending = err->error;
1558
1559 return NL_STOP;
1560 }
1561
1562 int system_if_check(struct device *dev)
1563 {
1564 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1565 struct nl_msg *msg;
1566 struct ifinfomsg ifi = {
1567 .ifi_family = AF_UNSPEC,
1568 .ifi_index = 0,
1569 };
1570 struct if_check_data chk = {
1571 .dev = dev,
1572 .pending = 1,
1573 };
1574 int ret = 1;
1575
1576 if (!cb)
1577 return ret;
1578
1579 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1580 if (!msg)
1581 goto out;
1582
1583 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1584 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1585 goto free;
1586
1587 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1588 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1589 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1590
1591 nl_send_auto_complete(sock_rtnl, msg);
1592 while (chk.pending > 0)
1593 nl_recvmsgs(sock_rtnl, cb);
1594
1595 ret = chk.pending;
1596
1597 free:
1598 nlmsg_free(msg);
1599 out:
1600 nl_cb_put(cb);
1601 return ret;
1602 }
1603
1604 struct device *
1605 system_if_get_parent(struct device *dev)
1606 {
1607 char buf[64], *devname;
1608 int ifindex, iflink, len;
1609 FILE *f;
1610
1611 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1612 f = fopen(buf, "r");
1613 if (!f)
1614 return NULL;
1615
1616 len = fread(buf, 1, sizeof(buf) - 1, f);
1617 fclose(f);
1618
1619 if (len <= 0)
1620 return NULL;
1621
1622 buf[len] = 0;
1623 iflink = strtoul(buf, NULL, 0);
1624 ifindex = system_if_resolve(dev);
1625 if (!iflink || iflink == ifindex)
1626 return NULL;
1627
1628 devname = if_indextoname(iflink, buf);
1629 if (!devname)
1630 return NULL;
1631
1632 return device_get(devname, true);
1633 }
1634
1635 static bool
1636 read_string_file(int dir_fd, const char *file, char *buf, int len)
1637 {
1638 bool ret = false;
1639 char *c;
1640 int fd;
1641
1642 fd = openat(dir_fd, file, O_RDONLY);
1643 if (fd < 0)
1644 return false;
1645
1646 retry:
1647 len = read(fd, buf, len - 1);
1648 if (len < 0) {
1649 if (errno == EINTR)
1650 goto retry;
1651 } else if (len > 0) {
1652 buf[len] = 0;
1653
1654 c = strchr(buf, '\n');
1655 if (c)
1656 *c = 0;
1657
1658 ret = true;
1659 }
1660
1661 close(fd);
1662
1663 return ret;
1664 }
1665
1666 static bool
1667 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1668 {
1669 char buf[64];
1670 bool ret = false;
1671
1672 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1673 if (ret)
1674 *val = strtoull(buf, NULL, 0);
1675
1676 return ret;
1677 }
1678
1679 /* Assume advertised flags == supported flags */
1680 static const struct {
1681 uint32_t mask;
1682 const char *name;
1683 } ethtool_link_modes[] = {
1684 { ADVERTISED_10baseT_Half, "10H" },
1685 { ADVERTISED_10baseT_Full, "10F" },
1686 { ADVERTISED_100baseT_Half, "100H" },
1687 { ADVERTISED_100baseT_Full, "100F" },
1688 { ADVERTISED_1000baseT_Half, "1000H" },
1689 { ADVERTISED_1000baseT_Full, "1000F" },
1690 };
1691
1692 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1693 {
1694 int i;
1695 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1696 if (mask & ethtool_link_modes[i].mask)
1697 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1698 }
1699 }
1700
1701 bool
1702 system_if_force_external(const char *ifname)
1703 {
1704 char buf[64];
1705 struct stat s;
1706
1707 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1708 return stat(buf, &s) == 0;
1709 }
1710
1711 int
1712 system_if_dump_info(struct device *dev, struct blob_buf *b)
1713 {
1714 struct ethtool_cmd ecmd;
1715 struct ifreq ifr;
1716 char *s;
1717 void *c;
1718
1719 memset(&ecmd, 0, sizeof(ecmd));
1720 memset(&ifr, 0, sizeof(ifr));
1721 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1722 ifr.ifr_data = (caddr_t) &ecmd;
1723 ecmd.cmd = ETHTOOL_GSET;
1724
1725 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1726 c = blobmsg_open_array(b, "link-advertising");
1727 system_add_link_modes(b, ecmd.advertising);
1728 blobmsg_close_array(b, c);
1729
1730 c = blobmsg_open_array(b, "link-supported");
1731 system_add_link_modes(b, ecmd.supported);
1732 blobmsg_close_array(b, c);
1733
1734 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1735 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1736 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1737 blobmsg_add_string_buffer(b);
1738 }
1739
1740 return 0;
1741 }
1742
1743 int
1744 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1745 {
1746 const char *const counters[] = {
1747 "collisions", "rx_frame_errors", "tx_compressed",
1748 "multicast", "rx_length_errors", "tx_dropped",
1749 "rx_bytes", "rx_missed_errors", "tx_errors",
1750 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1751 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1752 "rx_dropped", "tx_aborted_errors", "tx_packets",
1753 "rx_errors", "tx_bytes", "tx_window_errors",
1754 "rx_fifo_errors", "tx_carrier_errors",
1755 };
1756 char buf[64];
1757 int stats_dir;
1758 int i;
1759 uint64_t val = 0;
1760
1761 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1762 stats_dir = open(buf, O_DIRECTORY);
1763 if (stats_dir < 0)
1764 return -1;
1765
1766 for (i = 0; i < ARRAY_SIZE(counters); i++)
1767 if (read_uint64_file(stats_dir, counters[i], &val))
1768 blobmsg_add_u64(b, counters[i], val);
1769
1770 close(stats_dir);
1771 return 0;
1772 }
1773
1774 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1775 {
1776 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1777 int alen = v4 ? 4 : 16;
1778 unsigned int flags = 0;
1779 struct ifaddrmsg ifa = {
1780 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1781 .ifa_prefixlen = addr->mask,
1782 .ifa_index = dev->ifindex,
1783 };
1784
1785 struct nl_msg *msg;
1786 if (cmd == RTM_NEWADDR)
1787 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1788
1789 msg = nlmsg_alloc_simple(cmd, flags);
1790 if (!msg)
1791 return -1;
1792
1793 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1794 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1795 if (v4) {
1796 if (addr->broadcast)
1797 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1798 if (addr->point_to_point)
1799 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1800 } else {
1801 time_t now = system_get_rtime();
1802 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1803
1804 if (addr->preferred_until) {
1805 int64_t preferred = addr->preferred_until - now;
1806 if (preferred < 0)
1807 preferred = 0;
1808 else if (preferred > UINT32_MAX)
1809 preferred = UINT32_MAX;
1810
1811 cinfo.ifa_prefered = preferred;
1812 }
1813
1814 if (addr->valid_until) {
1815 int64_t valid = addr->valid_until - now;
1816 if (valid <= 0) {
1817 nlmsg_free(msg);
1818 return -1;
1819 }
1820 else if (valid > UINT32_MAX)
1821 valid = UINT32_MAX;
1822
1823 cinfo.ifa_valid = valid;
1824 }
1825
1826 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1827
1828 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1829 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1830 }
1831
1832 return system_rtnl_call(msg);
1833 }
1834
1835 int system_add_address(struct device *dev, struct device_addr *addr)
1836 {
1837 return system_addr(dev, addr, RTM_NEWADDR);
1838 }
1839
1840 int system_del_address(struct device *dev, struct device_addr *addr)
1841 {
1842 return system_addr(dev, addr, RTM_DELADDR);
1843 }
1844
1845 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1846 {
1847 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1848 bool have_gw;
1849 unsigned int flags = 0;
1850
1851 if (alen == 4)
1852 have_gw = !!route->nexthop.in.s_addr;
1853 else
1854 have_gw = route->nexthop.in6.s6_addr32[0] ||
1855 route->nexthop.in6.s6_addr32[1] ||
1856 route->nexthop.in6.s6_addr32[2] ||
1857 route->nexthop.in6.s6_addr32[3];
1858
1859 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1860 ? route->table : RT_TABLE_MAIN;
1861
1862 struct rtmsg rtm = {
1863 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1864 .rtm_dst_len = route->mask,
1865 .rtm_src_len = route->sourcemask,
1866 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1867 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1868 .rtm_scope = RT_SCOPE_NOWHERE,
1869 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1870 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1871 };
1872 struct nl_msg *msg;
1873
1874 if (cmd == RTM_NEWROUTE) {
1875 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1876
1877 if (!dev) { // Add null-route
1878 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1879 rtm.rtm_type = RTN_UNREACHABLE;
1880 }
1881 else
1882 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1883 }
1884
1885 if (route->flags & DEVROUTE_TYPE) {
1886 rtm.rtm_type = route->type;
1887 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1888 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1889 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1890 rtm.rtm_table = RT_TABLE_LOCAL;
1891 }
1892
1893 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1894 rtm.rtm_scope = RT_SCOPE_HOST;
1895 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1896 rtm.rtm_type == RTN_ANYCAST) {
1897 rtm.rtm_scope = RT_SCOPE_LINK;
1898 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1899 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1900 rtm.rtm_type == RTN_THROW) {
1901 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1902 dev = NULL;
1903 }
1904 }
1905
1906 msg = nlmsg_alloc_simple(cmd, flags);
1907 if (!msg)
1908 return -1;
1909
1910 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1911
1912 if (route->mask)
1913 nla_put(msg, RTA_DST, alen, &route->addr);
1914
1915 if (route->sourcemask) {
1916 if (rtm.rtm_family == AF_INET)
1917 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1918 else
1919 nla_put(msg, RTA_SRC, alen, &route->source);
1920 }
1921
1922 if (route->metric > 0)
1923 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1924
1925 if (have_gw)
1926 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1927
1928 if (dev)
1929 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1930
1931 if (table >= 256)
1932 nla_put_u32(msg, RTA_TABLE, table);
1933
1934 if (route->flags & DEVROUTE_MTU) {
1935 struct nlattr *metrics;
1936
1937 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1938 goto nla_put_failure;
1939
1940 nla_put_u32(msg, RTAX_MTU, route->mtu);
1941
1942 nla_nest_end(msg, metrics);
1943 }
1944
1945 return system_rtnl_call(msg);
1946
1947 nla_put_failure:
1948 nlmsg_free(msg);
1949 return -ENOMEM;
1950 }
1951
1952 int system_add_route(struct device *dev, struct device_route *route)
1953 {
1954 return system_rt(dev, route, RTM_NEWROUTE);
1955 }
1956
1957 int system_del_route(struct device *dev, struct device_route *route)
1958 {
1959 return system_rt(dev, route, RTM_DELROUTE);
1960 }
1961
1962 int system_flush_routes(void)
1963 {
1964 const char *names[] = {
1965 "/proc/sys/net/ipv4/route/flush",
1966 "/proc/sys/net/ipv6/route/flush"
1967 };
1968 int fd, i;
1969
1970 for (i = 0; i < ARRAY_SIZE(names); i++) {
1971 fd = open(names[i], O_WRONLY);
1972 if (fd < 0)
1973 continue;
1974
1975 if (write(fd, "-1", 2)) {}
1976 close(fd);
1977 }
1978 return 0;
1979 }
1980
1981 bool system_resolve_rt_type(const char *type, unsigned int *id)
1982 {
1983 return system_rtn_aton(type, id);
1984 }
1985
1986 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1987 {
1988 FILE *f;
1989 char *e, buf[128];
1990 unsigned int n, proto = 256;
1991 n = strtoul(type, &e, 0);
1992 if (!*e && e != type)
1993 proto = n;
1994 else if (!strcmp(type, "unspec"))
1995 proto = RTPROT_UNSPEC;
1996 else if (!strcmp(type, "kernel"))
1997 proto = RTPROT_KERNEL;
1998 else if (!strcmp(type, "boot"))
1999 proto = RTPROT_BOOT;
2000 else if (!strcmp(type, "static"))
2001 proto = RTPROT_STATIC;
2002 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2003 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2004 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2005 continue;
2006
2007 n = strtoul(e, NULL, 10);
2008 e = strtok(NULL, " \t\n");
2009
2010 if (e && !strcmp(e, type)) {
2011 proto = n;
2012 break;
2013 }
2014 }
2015 fclose(f);
2016 }
2017
2018 if (proto > 255)
2019 return false;
2020
2021 *id = proto;
2022 return true;
2023 }
2024
2025 bool system_resolve_rt_table(const char *name, unsigned int *id)
2026 {
2027 FILE *f;
2028 char *e, buf[128];
2029 unsigned int n, table = RT_TABLE_UNSPEC;
2030
2031 /* first try to parse table as number */
2032 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2033 table = n;
2034
2035 /* handle well known aliases */
2036 else if (!strcmp(name, "default"))
2037 table = RT_TABLE_DEFAULT;
2038 else if (!strcmp(name, "main"))
2039 table = RT_TABLE_MAIN;
2040 else if (!strcmp(name, "local"))
2041 table = RT_TABLE_LOCAL;
2042
2043 /* try to look up name in /etc/iproute2/rt_tables */
2044 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2045 {
2046 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2047 {
2048 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2049 continue;
2050
2051 n = strtoul(e, NULL, 10);
2052 e = strtok(NULL, " \t\n");
2053
2054 if (e && !strcmp(e, name))
2055 {
2056 table = n;
2057 break;
2058 }
2059 }
2060
2061 fclose(f);
2062 }
2063
2064 if (table == RT_TABLE_UNSPEC)
2065 return false;
2066
2067 *id = table;
2068 return true;
2069 }
2070
2071 bool system_is_default_rt_table(unsigned int id)
2072 {
2073 return (id == RT_TABLE_MAIN);
2074 }
2075
2076 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2077 {
2078 char *e;
2079 unsigned int n;
2080
2081 if (!strcmp(filter, "strict"))
2082 n = 1;
2083 else if (!strcmp(filter, "loose"))
2084 n = 2;
2085 else {
2086 n = strtoul(filter, &e, 0);
2087 if (*e || e == filter || n > 2)
2088 return false;
2089 }
2090
2091 *id = n;
2092 return true;
2093 }
2094
2095 static int system_iprule(struct iprule *rule, int cmd)
2096 {
2097 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2098
2099 struct nl_msg *msg;
2100 struct rtmsg rtm = {
2101 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2102 .rtm_protocol = RTPROT_STATIC,
2103 .rtm_scope = RT_SCOPE_UNIVERSE,
2104 .rtm_table = RT_TABLE_UNSPEC,
2105 .rtm_type = RTN_UNSPEC,
2106 .rtm_flags = 0,
2107 };
2108
2109 if (cmd == RTM_NEWRULE)
2110 rtm.rtm_type = RTN_UNICAST;
2111
2112 if (rule->invert)
2113 rtm.rtm_flags |= FIB_RULE_INVERT;
2114
2115 if (rule->flags & IPRULE_SRC)
2116 rtm.rtm_src_len = rule->src_mask;
2117
2118 if (rule->flags & IPRULE_DEST)
2119 rtm.rtm_dst_len = rule->dest_mask;
2120
2121 if (rule->flags & IPRULE_TOS)
2122 rtm.rtm_tos = rule->tos;
2123
2124 if (rule->flags & IPRULE_LOOKUP) {
2125 if (rule->lookup < 256)
2126 rtm.rtm_table = rule->lookup;
2127 }
2128
2129 if (rule->flags & IPRULE_ACTION)
2130 rtm.rtm_type = rule->action;
2131 else if (rule->flags & IPRULE_GOTO)
2132 rtm.rtm_type = FR_ACT_GOTO;
2133 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2134 rtm.rtm_type = FR_ACT_NOP;
2135
2136 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2137
2138 if (!msg)
2139 return -1;
2140
2141 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2142
2143 if (rule->flags & IPRULE_IN)
2144 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2145
2146 if (rule->flags & IPRULE_OUT)
2147 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2148
2149 if (rule->flags & IPRULE_SRC)
2150 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2151
2152 if (rule->flags & IPRULE_DEST)
2153 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2154
2155 if (rule->flags & IPRULE_PRIORITY)
2156 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2157 else if (cmd == RTM_NEWRULE)
2158 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2159
2160 if (rule->flags & IPRULE_FWMARK)
2161 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2162
2163 if (rule->flags & IPRULE_FWMASK)
2164 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2165
2166 if (rule->flags & IPRULE_LOOKUP) {
2167 if (rule->lookup >= 256)
2168 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2169 }
2170
2171 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2172 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2173
2174 if (rule->flags & IPRULE_GOTO)
2175 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2176
2177 return system_rtnl_call(msg);
2178 }
2179
2180 int system_add_iprule(struct iprule *rule)
2181 {
2182 return system_iprule(rule, RTM_NEWRULE);
2183 }
2184
2185 int system_del_iprule(struct iprule *rule)
2186 {
2187 return system_iprule(rule, RTM_DELRULE);
2188 }
2189
2190 int system_flush_iprules(void)
2191 {
2192 int rv = 0;
2193 struct iprule rule;
2194
2195 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2196 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2197
2198 memset(&rule, 0, sizeof(rule));
2199
2200
2201 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2202
2203 rule.priority = 0;
2204 rule.lookup = RT_TABLE_LOCAL;
2205 rv |= system_iprule(&rule, RTM_NEWRULE);
2206
2207 rule.priority = 32766;
2208 rule.lookup = RT_TABLE_MAIN;
2209 rv |= system_iprule(&rule, RTM_NEWRULE);
2210
2211 rule.priority = 32767;
2212 rule.lookup = RT_TABLE_DEFAULT;
2213 rv |= system_iprule(&rule, RTM_NEWRULE);
2214
2215
2216 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2217
2218 rule.priority = 0;
2219 rule.lookup = RT_TABLE_LOCAL;
2220 rv |= system_iprule(&rule, RTM_NEWRULE);
2221
2222 rule.priority = 32766;
2223 rule.lookup = RT_TABLE_MAIN;
2224 rv |= system_iprule(&rule, RTM_NEWRULE);
2225
2226 return rv;
2227 }
2228
2229 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2230 {
2231 return system_rtn_aton(action, id);
2232 }
2233
2234 time_t system_get_rtime(void)
2235 {
2236 struct timespec ts;
2237 struct timeval tv;
2238
2239 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2240 return ts.tv_sec;
2241
2242 if (gettimeofday(&tv, NULL) == 0)
2243 return tv.tv_sec;
2244
2245 return 0;
2246 }
2247
2248 #ifndef IP_DF
2249 #define IP_DF 0x4000
2250 #endif
2251
2252 static int tunnel_ioctl(const char *name, int cmd, void *p)
2253 {
2254 struct ifreq ifr;
2255
2256 memset(&ifr, 0, sizeof(ifr));
2257 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2258 ifr.ifr_ifru.ifru_data = p;
2259 return ioctl(sock_ioctl, cmd, &ifr);
2260 }
2261
2262 #ifdef IFLA_IPTUN_MAX
2263 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2264 struct blob_attr **tb)
2265 {
2266 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2267 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2268 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2269 struct blob_attr *cur;
2270 int ret = 0, ttl = 0;
2271
2272 if (!nlm)
2273 return -1;
2274
2275 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2276 nla_put_string(nlm, IFLA_IFNAME, name);
2277
2278 if (link)
2279 nla_put_u32(nlm, IFLA_LINK, link);
2280
2281 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2282 if (!linkinfo) {
2283 ret = -ENOMEM;
2284 goto failure;
2285 }
2286
2287 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2288 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2289 if (!infodata) {
2290 ret = -ENOMEM;
2291 goto failure;
2292 }
2293
2294 if (link)
2295 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2296
2297 if ((cur = tb[TUNNEL_ATTR_TTL]))
2298 ttl = blobmsg_get_u32(cur);
2299
2300 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2301 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2302 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2303
2304 struct in6_addr in6buf;
2305 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2306 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2307 ret = -EINVAL;
2308 goto failure;
2309 }
2310 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2311 }
2312
2313 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2314 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2315 ret = -EINVAL;
2316 goto failure;
2317 }
2318 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2319 }
2320
2321 #ifdef IFLA_IPTUN_FMR_MAX
2322 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2323 struct blob_attr *dcur;
2324 unsigned drem, fmrcnt = 0;
2325 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2326
2327 if (!fmrs) {
2328 ret = -ENOMEM;
2329 goto failure;
2330 }
2331
2332 blobmsg_for_each_attr(dcur, cur, drem) {
2333 if (blobmsg_type(dcur) != BLOBMSG_TYPE_ARRAY ||
2334 strcmp(blobmsg_name(dcur), "fmrs") ||
2335 blobmsg_check_array(dcur, BLOBMSG_TYPE_UNSPEC) <= 0)
2336 continue;
2337
2338 struct blob_attr *rcur;
2339 unsigned rrem;
2340 blobmsg_for_each_attr(rcur, dcur, rrem) {
2341 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2342 struct in6_addr ip6prefix;
2343 struct in_addr ip4prefix;
2344 unsigned ip4len, ip6len, ealen, offset;
2345
2346 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2347 blobmsg_data(rcur), blobmsg_len(rcur));
2348
2349 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2350 !parse_ip_and_netmask(AF_INET6,
2351 blobmsg_data(tb_cur), &ip6prefix,
2352 &ip6len)) {
2353 ret = -EINVAL;
2354 goto failure;
2355 }
2356
2357 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2358 !parse_ip_and_netmask(AF_INET,
2359 blobmsg_data(tb_cur), &ip4prefix,
2360 &ip4len)) {
2361 ret = -EINVAL;
2362 goto failure;
2363 }
2364
2365 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2366 ret = -EINVAL;
2367 goto failure;
2368 }
2369 ealen = blobmsg_get_u32(tb_cur);
2370
2371 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2372 ret = -EINVAL;
2373 goto failure;
2374 }
2375 offset = blobmsg_get_u32(tb_cur);
2376
2377 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2378 if (!rule) {
2379 ret = -ENOMEM;
2380 goto failure;
2381 }
2382
2383 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2384 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2385 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2386 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2387 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2388 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2389
2390 nla_nest_end(nlm, rule);
2391 }
2392 }
2393 nla_nest_end(nlm, fmrs);
2394 }
2395 #endif
2396
2397 nla_nest_end(nlm, infodata);
2398 nla_nest_end(nlm, linkinfo);
2399
2400 return system_rtnl_call(nlm);
2401
2402 failure:
2403 nlmsg_free(nlm);
2404 return ret;
2405 }
2406 #endif
2407
2408 #ifdef IFLA_IPTUN_MAX
2409 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2410 static int system_add_gre_tunnel(const char *name, const char *kind,
2411 const unsigned int link, struct blob_attr **tb, bool v6)
2412 {
2413 struct nl_msg *nlm;
2414 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2415 struct blob_attr *cur;
2416 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2417 uint16_t iflags = 0, oflags = 0;
2418 uint8_t tos = 0;
2419 int ret = 0, ttl = 0;
2420
2421 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2422 if (!nlm)
2423 return -1;
2424
2425 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2426 nla_put_string(nlm, IFLA_IFNAME, name);
2427
2428 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2429 if (!linkinfo) {
2430 ret = -ENOMEM;
2431 goto failure;
2432 }
2433
2434 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2435 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2436 if (!infodata) {
2437 ret = -ENOMEM;
2438 goto failure;
2439 }
2440
2441 if (link)
2442 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2443
2444 if ((cur = tb[TUNNEL_ATTR_TTL]))
2445 ttl = blobmsg_get_u32(cur);
2446
2447 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2448 char *str = blobmsg_get_string(cur);
2449 if (strcmp(str, "inherit")) {
2450 unsigned uval;
2451
2452 if (!system_tos_aton(str, &uval)) {
2453 ret = -EINVAL;
2454 goto failure;
2455 }
2456
2457 if (v6)
2458 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2459 else
2460 tos = uval;
2461 } else {
2462 if (v6)
2463 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2464 else
2465 tos = 1;
2466 }
2467 }
2468
2469 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2470 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2471
2472 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2473 blobmsg_data(cur), blobmsg_len(cur));
2474
2475 if ((cur = tb_data[GRE_DATA_IKEY])) {
2476 if ((ikey = blobmsg_get_u32(cur)))
2477 iflags |= GRE_KEY;
2478 }
2479
2480 if ((cur = tb_data[GRE_DATA_OKEY])) {
2481 if ((okey = blobmsg_get_u32(cur)))
2482 oflags |= GRE_KEY;
2483 }
2484
2485 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2486 if (blobmsg_get_bool(cur))
2487 iflags |= GRE_CSUM;
2488 }
2489
2490 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2491 if (blobmsg_get_bool(cur))
2492 oflags |= GRE_CSUM;
2493 }
2494
2495 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2496 if (blobmsg_get_bool(cur))
2497 iflags |= GRE_SEQ;
2498 }
2499
2500 if ((cur = tb[GRE_DATA_OSEQNO])) {
2501 if (blobmsg_get_bool(cur))
2502 oflags |= GRE_SEQ;
2503 }
2504 }
2505
2506 if (v6) {
2507 struct in6_addr in6buf;
2508 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2509 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2510 ret = -EINVAL;
2511 goto failure;
2512 }
2513 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2514 }
2515
2516 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2517 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2518 ret = -EINVAL;
2519 goto failure;
2520 }
2521 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2522 }
2523 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2524
2525 if (flowinfo)
2526 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2527
2528 if (flags)
2529 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2530
2531 if (!ttl)
2532 ttl = 64;
2533 } else {
2534 struct in_addr inbuf;
2535 bool set_df = true;
2536
2537 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2538 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2539 ret = -EINVAL;
2540 goto failure;
2541 }
2542 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2543 }
2544
2545 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2546 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2547 ret = -EINVAL;
2548 goto failure;
2549 }
2550 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2551
2552 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2553 if (!okey) {
2554 okey = inbuf.s_addr;
2555 oflags |= GRE_KEY;
2556 }
2557
2558 if (!ikey) {
2559 ikey = inbuf.s_addr;
2560 iflags |= GRE_KEY;
2561 }
2562 }
2563 }
2564
2565 if ((cur = tb[TUNNEL_ATTR_DF]))
2566 set_df = blobmsg_get_bool(cur);
2567
2568 if (!set_df) {
2569 /* ttl != 0 and nopmtudisc are incompatible */
2570 if (ttl) {
2571 ret = -EINVAL;
2572 goto failure;
2573 }
2574 } else if (!ttl)
2575 ttl = 64;
2576
2577 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2578
2579 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2580 }
2581
2582 if (ttl)
2583 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2584
2585 if (oflags)
2586 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2587
2588 if (iflags)
2589 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2590
2591 if (okey)
2592 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2593
2594 if (ikey)
2595 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2596
2597 nla_nest_end(nlm, infodata);
2598 nla_nest_end(nlm, linkinfo);
2599
2600 return system_rtnl_call(nlm);
2601
2602 failure:
2603 nlmsg_free(nlm);
2604 return ret;
2605 }
2606 #endif
2607
2608 #ifdef IFLA_VTI_MAX
2609 static int system_add_vti_tunnel(const char *name, const char *kind,
2610 const unsigned int link, struct blob_attr **tb, bool v6)
2611 {
2612 struct nl_msg *nlm;
2613 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2614 struct blob_attr *cur;
2615 int ret = 0;
2616
2617 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2618 if (!nlm)
2619 return -1;
2620
2621 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2622 nla_put_string(nlm, IFLA_IFNAME, name);
2623
2624 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2625 if (!linkinfo) {
2626 ret = -ENOMEM;
2627 goto failure;
2628 }
2629
2630 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2631 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2632 if (!infodata) {
2633 ret = -ENOMEM;
2634 goto failure;
2635 }
2636
2637 if (link)
2638 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2639
2640 if (v6) {
2641 struct in6_addr in6buf;
2642 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2643 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2644 ret = -EINVAL;
2645 goto failure;
2646 }
2647 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2648 }
2649
2650 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2651 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2652 ret = -EINVAL;
2653 goto failure;
2654 }
2655 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2656 }
2657
2658 } else {
2659 struct in_addr inbuf;
2660
2661 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2662 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2663 ret = -EINVAL;
2664 goto failure;
2665 }
2666 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2667 }
2668
2669 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2670 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2671 ret = -EINVAL;
2672 goto failure;
2673 }
2674 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2675 }
2676
2677 }
2678
2679 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2680 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2681 uint32_t ikey = 0, okey = 0;
2682
2683 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2684 blobmsg_data(cur), blobmsg_len(cur));
2685
2686 if ((cur = tb_data[VTI_DATA_IKEY])) {
2687 if ((ikey = blobmsg_get_u32(cur)))
2688 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2689 }
2690
2691 if ((cur = tb_data[VTI_DATA_OKEY])) {
2692 if ((okey = blobmsg_get_u32(cur)))
2693 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2694 }
2695 }
2696
2697 nla_nest_end(nlm, infodata);
2698 nla_nest_end(nlm, linkinfo);
2699
2700 return system_rtnl_call(nlm);
2701
2702 failure:
2703 nlmsg_free(nlm);
2704 return ret;
2705 }
2706 #endif
2707
2708 #ifdef IFLA_VXLAN_MAX
2709 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2710 {
2711 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2712 struct nl_msg *msg;
2713 struct nlattr *linkinfo, *data;
2714 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2715 struct blob_attr *cur;
2716 int ret = 0;
2717
2718 if ((cur = tb[TUNNEL_ATTR_DATA]))
2719 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2720 blobmsg_data(cur), blobmsg_len(cur));
2721 else
2722 return -EINVAL;
2723
2724 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2725
2726 if (!msg)
2727 return -1;
2728
2729 nlmsg_append(msg, &iim, sizeof(iim), 0);
2730
2731 nla_put_string(msg, IFLA_IFNAME, name);
2732
2733 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2734 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2735 if (!ea) {
2736 ret = -EINVAL;
2737 goto failure;
2738 }
2739
2740 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2741 }
2742
2743 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2744 uint32_t mtu = blobmsg_get_u32(cur);
2745 nla_put_u32(msg, IFLA_MTU, mtu);
2746 }
2747
2748 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2749 ret = -ENOMEM;
2750 goto failure;
2751 }
2752
2753 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2754
2755 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2756 ret = -ENOMEM;
2757 goto failure;
2758 }
2759
2760 if (link)
2761 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2762
2763 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2764 uint32_t id = blobmsg_get_u32(cur);
2765 if (id >= (1u << 24) - 1) {
2766 ret = -EINVAL;
2767 goto failure;
2768 }
2769
2770 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2771 }
2772
2773 if (v6) {
2774 struct in6_addr in6buf;
2775 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2776 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2777 ret = -EINVAL;
2778 goto failure;
2779 }
2780 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2781 }
2782
2783 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2784 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2785 ret = -EINVAL;
2786 goto failure;
2787 }
2788 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2789 }
2790 } else {
2791 struct in_addr inbuf;
2792
2793 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2794 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2795 ret = -EINVAL;
2796 goto failure;
2797 }
2798 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2799 }
2800
2801 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2802 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2803 ret = -EINVAL;
2804 goto failure;
2805 }
2806 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2807 }
2808 }
2809
2810 uint32_t port = 4789;
2811 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2812 port = blobmsg_get_u32(cur);
2813 if (port < 1 || port > 65535) {
2814 ret = -EINVAL;
2815 goto failure;
2816 }
2817 }
2818 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2819
2820 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2821 bool rxcsum = blobmsg_get_bool(cur);
2822 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2823 }
2824
2825 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
2826 bool txcsum = blobmsg_get_bool(cur);
2827 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
2828 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
2829 }
2830
2831 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2832 char *str = blobmsg_get_string(cur);
2833 unsigned tos = 1;
2834
2835 if (strcmp(str, "inherit")) {
2836 if (!system_tos_aton(str, &tos)) {
2837 ret = -EINVAL;
2838 goto failure;
2839 }
2840 }
2841
2842 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2843 }
2844
2845 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2846 uint32_t ttl = blobmsg_get_u32(cur);
2847 if (ttl < 1 || ttl > 255) {
2848 ret = -EINVAL;
2849 goto failure;
2850 }
2851
2852 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2853 }
2854
2855 nla_nest_end(msg, data);
2856 nla_nest_end(msg, linkinfo);
2857
2858 ret = system_rtnl_call(msg);
2859 if (ret)
2860 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2861
2862 return ret;
2863
2864 failure:
2865 nlmsg_free(msg);
2866 return ret;
2867 }
2868 #endif
2869
2870 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2871 {
2872 struct blob_attr *cur;
2873 int ret = 0;
2874
2875 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2876 return -1;
2877
2878 #ifdef SIOCADD6RD
2879 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2880 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2881 unsigned int mask;
2882 struct ip_tunnel_6rd p6;
2883
2884 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2885 blobmsg_data(cur), blobmsg_len(cur));
2886
2887 memset(&p6, 0, sizeof(p6));
2888
2889 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2890 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2891 &p6.prefix, &mask) || mask > 128) {
2892 ret = -EINVAL;
2893 goto failure;
2894 }
2895
2896 p6.prefixlen = mask;
2897 }
2898
2899 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2900 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2901 &p6.relay_prefix, &mask) || mask > 32) {
2902 ret = -EINVAL;
2903 goto failure;
2904 }
2905
2906 p6.relay_prefixlen = mask;
2907 }
2908
2909 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2910 ret = -1;
2911 goto failure;
2912 }
2913 }
2914 #endif
2915
2916 return ret;
2917
2918 failure:
2919 __system_del_ip_tunnel(name, tb);
2920 return ret;
2921 }
2922
2923 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2924 {
2925 struct blob_attr *cur;
2926 bool set_df = true;
2927 struct ip_tunnel_parm p = {
2928 .link = link,
2929 .iph = {
2930 .version = 4,
2931 .ihl = 5,
2932 .protocol = proto,
2933 }
2934 };
2935
2936 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2937 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2938 return -EINVAL;
2939
2940 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2941 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2942 return -EINVAL;
2943
2944 if ((cur = tb[TUNNEL_ATTR_DF]))
2945 set_df = blobmsg_get_bool(cur);
2946
2947 if ((cur = tb[TUNNEL_ATTR_TTL]))
2948 p.iph.ttl = blobmsg_get_u32(cur);
2949
2950 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2951 char *str = blobmsg_get_string(cur);
2952 if (strcmp(str, "inherit")) {
2953 unsigned uval;
2954
2955 if (!system_tos_aton(str, &uval))
2956 return -EINVAL;
2957
2958 p.iph.tos = uval;
2959 } else
2960 p.iph.tos = 1;
2961 }
2962
2963 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2964 /* ttl !=0 and nopmtudisc are incompatible */
2965 if (p.iph.ttl && p.iph.frag_off == 0)
2966 return -EINVAL;
2967
2968 strncpy(p.name, name, sizeof(p.name));
2969
2970 switch (p.iph.protocol) {
2971 case IPPROTO_IPIP:
2972 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2973 case IPPROTO_IPV6:
2974 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2975 default:
2976 break;
2977 }
2978 return -1;
2979 }
2980
2981 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2982 {
2983 struct blob_attr *cur;
2984 const char *str;
2985
2986 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2987 return -EINVAL;
2988 str = blobmsg_data(cur);
2989
2990 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2991 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2992 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2993 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2994 return system_link_del(name);
2995 else
2996 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2997 }
2998
2999 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3000 {
3001 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3002
3003 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3004 blob_data(attr), blob_len(attr));
3005
3006 return __system_del_ip_tunnel(name, tb);
3007 }
3008
3009 int system_update_ipv6_mtu(struct device *dev, int mtu)
3010 {
3011 int ret = -1;
3012 char buf[64];
3013 int fd;
3014
3015 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3016 dev->ifname);
3017
3018 fd = open(buf, O_RDWR);
3019 if (fd < 0)
3020 return ret;
3021
3022 if (!mtu) {
3023 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3024 if (len < 0)
3025 goto out;
3026
3027 buf[len] = 0;
3028 ret = atoi(buf);
3029 } else {
3030 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3031 ret = mtu;
3032 }
3033
3034 out:
3035 close(fd);
3036 return ret;
3037 }
3038
3039 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3040 {
3041 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3042 struct blob_attr *cur;
3043 const char *str;
3044
3045 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3046 blob_data(attr), blob_len(attr));
3047
3048 __system_del_ip_tunnel(name, tb);
3049
3050 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3051 return -EINVAL;
3052 str = blobmsg_data(cur);
3053
3054 unsigned int ttl = 0;
3055 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3056 ttl = blobmsg_get_u32(cur);
3057 if (ttl > 255)
3058 return -EINVAL;
3059 }
3060
3061 unsigned int link = 0;
3062 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3063 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3064 if (!iface)
3065 return -EINVAL;
3066
3067 if (iface->l3_dev.dev)
3068 link = iface->l3_dev.dev->ifindex;
3069 }
3070
3071 if (!strcmp(str, "sit"))
3072 return system_add_sit_tunnel(name, link, tb);
3073 #ifdef IFLA_IPTUN_MAX
3074 else if (!strcmp(str, "ipip6")) {
3075 return system_add_ip6_tunnel(name, link, tb);
3076 } else if (!strcmp(str, "greip")) {
3077 return system_add_gre_tunnel(name, "gre", link, tb, false);
3078 } else if (!strcmp(str, "gretapip")) {
3079 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3080 } else if (!strcmp(str, "greip6")) {
3081 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3082 } else if (!strcmp(str, "gretapip6")) {
3083 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3084 #ifdef IFLA_VTI_MAX
3085 } else if (!strcmp(str, "vtiip")) {
3086 return system_add_vti_tunnel(name, "vti", link, tb, false);
3087 } else if (!strcmp(str, "vtiip6")) {
3088 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3089 #endif
3090 #ifdef IFLA_VXLAN_MAX
3091 } else if(!strcmp(str, "vxlan")) {
3092 return system_add_vxlan(name, link, tb, false);
3093 } else if(!strcmp(str, "vxlan6")) {
3094 return system_add_vxlan(name, link, tb, true);
3095 #endif
3096 #endif
3097 } else if (!strcmp(str, "ipip")) {
3098 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3099 }
3100 else
3101 return -EINVAL;
3102
3103 return 0;
3104 }
OpenWrt Network interface configuration daemon