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system-linux: fix memory leak on error in system_add_vxlan()
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18 #define _GNU_SOURCE
19
20 #include <sys/socket.h>
21 #include <sys/ioctl.h>
22 #include <sys/stat.h>
23 #include <sys/syscall.h>
24
25 #include <net/if.h>
26 #include <net/if_arp.h>
27
28 #include <arpa/inet.h>
29 #include <netinet/ether.h>
30 #include <netinet/in.h>
31
32 #include <linux/rtnetlink.h>
33 #include <linux/sockios.h>
34 #include <linux/ip.h>
35 #include <linux/if_addr.h>
36 #include <linux/if_link.h>
37 #include <linux/if_vlan.h>
38 #include <linux/if_bridge.h>
39 #include <linux/if_tunnel.h>
40 #include <linux/ip6_tunnel.h>
41 #include <linux/ethtool.h>
42 #include <linux/fib_rules.h>
43 #include <linux/veth.h>
44 #include <linux/version.h>
45
46 #ifndef RTN_FAILED_POLICY
47 #define RTN_FAILED_POLICY 12
48 #endif
49
50 #ifndef IFA_F_NOPREFIXROUTE
51 #define IFA_F_NOPREFIXROUTE 0x200
52 #endif
53
54 #ifndef IFA_FLAGS
55 #define IFA_FLAGS (IFA_MULTICAST + 1)
56 #endif
57
58 #include <string.h>
59 #include <fcntl.h>
60 #include <glob.h>
61 #include <time.h>
62 #include <unistd.h>
63
64 #include <netlink/msg.h>
65 #include <netlink/attr.h>
66 #include <netlink/socket.h>
67 #include <libubox/uloop.h>
68
69 #include "netifd.h"
70 #include "device.h"
71 #include "system.h"
72
73 struct event_socket {
74 struct uloop_fd uloop;
75 struct nl_sock *sock;
76 int bufsize;
77 };
78
79 static int sock_ioctl = -1;
80 static struct nl_sock *sock_rtnl = NULL;
81
82 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
83 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
84 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
85 const unsigned int link, struct blob_attr **tb);
86 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
87
88 static char dev_buf[256];
89
90 static void
91 handler_nl_event(struct uloop_fd *u, unsigned int events)
92 {
93 struct event_socket *ev = container_of(u, struct event_socket, uloop);
94 int err;
95 socklen_t errlen = sizeof(err);
96
97 if (!u->error) {
98 nl_recvmsgs_default(ev->sock);
99 return;
100 }
101
102 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
103 goto abort;
104
105 switch(err) {
106 case ENOBUFS:
107 // Increase rx buffer size on netlink socket
108 ev->bufsize *= 2;
109 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
110 goto abort;
111
112 // Request full dump since some info got dropped
113 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
114 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
115 break;
116
117 default:
118 goto abort;
119 }
120 u->error = false;
121 return;
122
123 abort:
124 uloop_fd_delete(&ev->uloop);
125 return;
126 }
127
128 static struct nl_sock *
129 create_socket(int protocol, int groups)
130 {
131 struct nl_sock *sock;
132
133 sock = nl_socket_alloc();
134 if (!sock)
135 return NULL;
136
137 if (groups)
138 nl_join_groups(sock, groups);
139
140 if (nl_connect(sock, protocol))
141 return NULL;
142
143 return sock;
144 }
145
146 static bool
147 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
148 uloop_fd_handler cb, int flags)
149 {
150 ev->sock = create_socket(protocol, groups);
151 if (!ev->sock)
152 return false;
153
154 ev->uloop.fd = nl_socket_get_fd(ev->sock);
155 ev->uloop.cb = cb;
156 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
157 return false;
158
159 return true;
160 }
161
162 static bool
163 create_event_socket(struct event_socket *ev, int protocol,
164 int (*cb)(struct nl_msg *msg, void *arg))
165 {
166 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
167 return false;
168
169 // Install the valid custom callback handler
170 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
171
172 // Disable sequence number checking on event sockets
173 nl_socket_disable_seq_check(ev->sock);
174
175 // Increase rx buffer size to 65K on event sockets
176 ev->bufsize = 65535;
177 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
178 return false;
179
180 return true;
181 }
182
183 static bool
184 system_rtn_aton(const char *src, unsigned int *dst)
185 {
186 char *e;
187 unsigned int n;
188
189 if (!strcmp(src, "local"))
190 n = RTN_LOCAL;
191 else if (!strcmp(src, "nat"))
192 n = RTN_NAT;
193 else if (!strcmp(src, "broadcast"))
194 n = RTN_BROADCAST;
195 else if (!strcmp(src, "anycast"))
196 n = RTN_ANYCAST;
197 else if (!strcmp(src, "multicast"))
198 n = RTN_MULTICAST;
199 else if (!strcmp(src, "prohibit"))
200 n = RTN_PROHIBIT;
201 else if (!strcmp(src, "unreachable"))
202 n = RTN_UNREACHABLE;
203 else if (!strcmp(src, "blackhole"))
204 n = RTN_BLACKHOLE;
205 else if (!strcmp(src, "xresolve"))
206 n = RTN_XRESOLVE;
207 else if (!strcmp(src, "unicast"))
208 n = RTN_UNICAST;
209 else if (!strcmp(src, "throw"))
210 n = RTN_THROW;
211 else if (!strcmp(src, "failed_policy"))
212 n = RTN_FAILED_POLICY;
213 else {
214 n = strtoul(src, &e, 0);
215 if (!e || *e || e == src || n > 255)
216 return false;
217 }
218
219 *dst = n;
220 return true;
221 }
222
223 static bool
224 system_tos_aton(const char *src, unsigned *dst)
225 {
226 char *e;
227
228 *dst = strtoul(src, &e, 16);
229 if (e == src || *e || *dst > 255)
230 return false;
231
232 return true;
233 }
234
235 int system_init(void)
236 {
237 static struct event_socket rtnl_event;
238 static struct event_socket hotplug_event;
239
240 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
241 system_fd_set_cloexec(sock_ioctl);
242
243 // Prepare socket for routing / address control
244 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
245 if (!sock_rtnl)
246 return -1;
247
248 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
249 return -1;
250
251 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
252 handle_hotplug_event, 0))
253 return -1;
254
255 // Receive network link events form kernel
256 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
257
258 return 0;
259 }
260
261 static void system_set_sysctl(const char *path, const char *val)
262 {
263 int fd;
264
265 fd = open(path, O_WRONLY);
266 if (fd < 0)
267 return;
268
269 if (write(fd, val, strlen(val))) {}
270 close(fd);
271 }
272
273 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
274 {
275 snprintf(dev_buf, sizeof(dev_buf), path, device);
276 system_set_sysctl(dev_buf, val);
277 }
278
279 static void system_set_disable_ipv6(struct device *dev, const char *val)
280 {
281 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
282 }
283
284 static void system_set_rpfilter(struct device *dev, const char *val)
285 {
286 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
287 }
288
289 static void system_set_acceptlocal(struct device *dev, const char *val)
290 {
291 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
292 }
293
294 static void system_set_igmpversion(struct device *dev, const char *val)
295 {
296 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
297 }
298
299 static void system_set_mldversion(struct device *dev, const char *val)
300 {
301 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
302 }
303
304 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
305 {
306 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
307 }
308
309 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
310 {
311 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
312 }
313
314 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
315 {
316 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
317 }
318
319 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
320 {
321 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
322 }
323
324 static void system_set_neigh4locktime(struct device *dev, const char *val)
325 {
326 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
327 }
328
329 static void system_set_dadtransmits(struct device *dev, const char *val)
330 {
331 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
332 }
333
334 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
335 {
336 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
337 }
338
339 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
340 {
341 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
342 }
343
344 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
345 {
346 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
347 }
348
349 static void system_bridge_set_isolate_mode(struct device *dev, const char *val)
350 {
351 system_set_dev_sysctl("/sys/class/net/%s/brport/isolate_mode", dev->ifname, val);
352 }
353
354 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
355 {
356 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
357 "/sys/class/net/%s/brport/multicast_router",
358 dev->ifname, val);
359 }
360
361 static void system_bridge_set_robustness(struct device *dev, const char *val)
362 {
363 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
364 dev->ifname, val);
365 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
366 dev->ifname, val);
367 }
368
369 static void system_bridge_set_query_interval(struct device *dev, const char *val)
370 {
371 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
372 dev->ifname, val);
373 }
374
375 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
376 {
377 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
378 dev->ifname, val);
379 }
380
381 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
382 {
383 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
384 dev->ifname, val);
385 }
386
387 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
388 {
389 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
390 dev->ifname, val);
391 }
392
393 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
394 {
395 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
396 dev->ifname, val);
397 }
398
399 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
400 {
401 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
402 dev->ifname, val);
403 }
404
405 static void system_bridge_set_learning(struct device *dev, const char *val)
406 {
407 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
408 }
409
410 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
411 {
412 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
413 }
414
415 static void system_set_sendredirects(struct device *dev, const char *val)
416 {
417 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
418 }
419
420 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
421 {
422 int fd = -1, ret = -1;
423
424 fd = open(path, O_RDONLY);
425 if (fd < 0)
426 goto out;
427
428 ssize_t len = read(fd, buf, buf_sz - 1);
429 if (len < 0)
430 goto out;
431
432 ret = buf[len] = 0;
433
434 out:
435 if (fd >= 0)
436 close(fd);
437
438 return ret;
439 }
440
441 static int
442 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
443 {
444 snprintf(dev_buf, sizeof(dev_buf), path, device);
445 return system_get_sysctl(dev_buf, buf, buf_sz);
446 }
447
448 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
449 {
450 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
451 dev->ifname, buf, buf_sz);
452 }
453
454 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
455 {
456 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
457 dev->ifname, buf, buf_sz);
458 }
459
460 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
461 {
462 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
463 dev->ifname, buf, buf_sz);
464 }
465
466 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
467 {
468 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
469 dev->ifname, buf, buf_sz);
470 }
471
472 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
473 {
474 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
475 dev->ifname, buf, buf_sz);
476 }
477
478 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
479 {
480 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
481 dev->ifname, buf, buf_sz);
482 }
483
484 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
485 {
486 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
487 dev->ifname, buf, buf_sz);
488 }
489
490 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
491 {
492 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
493 dev->ifname, buf, buf_sz);
494 }
495
496 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
497 {
498 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
499 dev->ifname, buf, buf_sz);
500 }
501
502 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
503 {
504 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
505 dev->ifname, buf, buf_sz);
506 }
507
508 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
509 {
510 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
511 dev->ifname, buf, buf_sz);
512 }
513
514 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
515 {
516 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
517 dev->ifname, buf, buf_sz);
518 }
519
520 // Evaluate netlink messages
521 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
522 {
523 struct nlmsghdr *nh = nlmsg_hdr(msg);
524 struct nlattr *nla[__IFLA_MAX];
525 int link_state = 0;
526 char buf[10];
527
528 if (nh->nlmsg_type != RTM_NEWLINK)
529 goto out;
530
531 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
532 if (!nla[IFLA_IFNAME])
533 goto out;
534
535 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
536 if (!dev)
537 goto out;
538
539 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
540 link_state = strtoul(buf, NULL, 0);
541
542 device_set_link(dev, link_state ? true : false);
543
544 out:
545 return 0;
546 }
547
548 static void
549 handle_hotplug_msg(char *data, int size)
550 {
551 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
552 char *cur, *end, *sep;
553 struct device *dev;
554 int skip;
555 bool add, move = false;
556
557 if (!strncmp(data, "add@", 4))
558 add = true;
559 else if (!strncmp(data, "remove@", 7))
560 add = false;
561 else if (!strncmp(data, "move@", 5)) {
562 add = true;
563 move = true;
564 }
565 else
566 return;
567
568 skip = strlen(data) + 1;
569 end = data + size;
570
571 for (cur = data + skip; cur < end; cur += skip) {
572 skip = strlen(cur) + 1;
573
574 sep = strchr(cur, '=');
575 if (!sep)
576 continue;
577
578 *sep = 0;
579 if (!strcmp(cur, "INTERFACE"))
580 interface = sep + 1;
581 else if (!strcmp(cur, "SUBSYSTEM")) {
582 subsystem = sep + 1;
583 if (strcmp(subsystem, "net") != 0)
584 return;
585 } else if (!strcmp(cur, "DEVPATH_OLD")) {
586 interface_old = strrchr(sep + 1, '/');
587 if (interface_old)
588 interface_old++;
589 }
590 }
591
592 if (subsystem && interface) {
593 if (move && interface_old)
594 goto move;
595 else
596 goto found;
597 }
598
599 return;
600
601 move:
602 dev = device_find(interface_old);
603 if (!dev)
604 goto found;
605
606 if (dev->type != &simple_device_type)
607 goto found;
608
609 device_set_present(dev, false);
610
611 found:
612 dev = device_find(interface);
613 if (!dev)
614 return;
615
616 if (dev->type != &simple_device_type)
617 return;
618
619 if (add && system_if_force_external(dev->ifname))
620 return;
621
622 device_set_present(dev, add);
623 }
624
625 static void
626 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
627 {
628 struct event_socket *ev = container_of(u, struct event_socket, uloop);
629 struct sockaddr_nl nla;
630 unsigned char *buf = NULL;
631 int size;
632
633 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
634 if (nla.nl_pid == 0)
635 handle_hotplug_msg((char *) buf, size);
636
637 free(buf);
638 }
639 }
640
641 static int system_rtnl_call(struct nl_msg *msg)
642 {
643 int ret;
644
645 ret = nl_send_auto_complete(sock_rtnl, msg);
646 nlmsg_free(msg);
647
648 if (ret < 0)
649 return ret;
650
651 return nl_wait_for_ack(sock_rtnl);
652 }
653
654 int system_bridge_delbr(struct device *bridge)
655 {
656 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
657 }
658
659 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
660 {
661 struct ifreq ifr;
662
663 memset(&ifr, 0, sizeof(ifr));
664 if (dev)
665 ifr.ifr_ifindex = dev->ifindex;
666 else
667 ifr.ifr_data = data;
668 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
669 return ioctl(sock_ioctl, cmd, &ifr);
670 }
671
672 static bool system_is_bridge(const char *name, char *buf, int buflen)
673 {
674 struct stat st;
675
676 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
677 if (stat(buf, &st) < 0)
678 return false;
679
680 return true;
681 }
682
683 static char *system_get_bridge(const char *name, char *buf, int buflen)
684 {
685 char *path;
686 ssize_t len = -1;
687 glob_t gl;
688
689 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
690 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
691 return NULL;
692
693 if (gl.gl_pathc > 0)
694 len = readlink(gl.gl_pathv[0], buf, buflen);
695
696 globfree(&gl);
697
698 if (len < 0)
699 return NULL;
700
701 buf[len] = 0;
702 path = strrchr(buf, '/');
703 if (!path)
704 return NULL;
705
706 return path + 1;
707 }
708
709 static void
710 system_bridge_set_wireless(struct device *bridge, struct device *dev)
711 {
712 bool mcast_to_ucast = dev->wireless_ap;
713 bool hairpin = true;
714
715 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
716 !bridge->settings.multicast_to_unicast)
717 mcast_to_ucast = false;
718
719 if (!mcast_to_ucast || dev->wireless_isolate)
720 hairpin = false;
721
722 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
723 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
724 }
725
726 int system_bridge_addif(struct device *bridge, struct device *dev)
727 {
728 char buf[64];
729 char *oldbr;
730 int ret = 0;
731
732 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
733 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
734 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
735
736 if (dev->wireless)
737 system_bridge_set_wireless(bridge, dev);
738
739 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
740 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
741 system_bridge_set_multicast_router(dev, buf, false);
742 }
743
744 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
745 dev->settings.multicast_fast_leave)
746 system_bridge_set_multicast_fast_leave(dev, "1");
747
748 if (dev->settings.flags & DEV_OPT_LEARNING &&
749 !dev->settings.learning)
750 system_bridge_set_learning(dev, "0");
751
752 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
753 !dev->settings.unicast_flood)
754 system_bridge_set_unicast_flood(dev, "0");
755
756 if (dev->settings.flags & DEV_OPT_ISOLATE &&
757 dev->settings.isolate)
758 system_bridge_set_isolate_mode(dev, "1");
759
760 return ret;
761 }
762
763 int system_bridge_delif(struct device *bridge, struct device *dev)
764 {
765 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
766 }
767
768 int system_if_resolve(struct device *dev)
769 {
770 struct ifreq ifr;
771 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
772 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
773 return ifr.ifr_ifindex;
774 else
775 return 0;
776 }
777
778 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
779 {
780 struct ifreq ifr;
781
782 memset(&ifr, 0, sizeof(ifr));
783 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
784 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
785 ifr.ifr_flags |= add;
786 ifr.ifr_flags &= ~rem;
787 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
788 }
789
790 struct clear_data {
791 struct nl_msg *msg;
792 struct device *dev;
793 int type;
794 int size;
795 int af;
796 };
797
798
799 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
800 {
801 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
802
803 return ifa->ifa_index == ifindex;
804 }
805
806 static bool check_route(struct nlmsghdr *hdr, int ifindex)
807 {
808 struct rtmsg *r = NLMSG_DATA(hdr);
809 struct nlattr *tb[__RTA_MAX];
810
811 if (r->rtm_protocol == RTPROT_KERNEL &&
812 r->rtm_family == AF_INET6)
813 return false;
814
815 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
816 if (!tb[RTA_OIF])
817 return false;
818
819 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
820 }
821
822 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
823 {
824 return true;
825 }
826
827 static int cb_clear_event(struct nl_msg *msg, void *arg)
828 {
829 struct clear_data *clr = arg;
830 struct nlmsghdr *hdr = nlmsg_hdr(msg);
831 bool (*cb)(struct nlmsghdr *, int ifindex);
832 int type;
833
834 switch(clr->type) {
835 case RTM_GETADDR:
836 type = RTM_DELADDR;
837 if (hdr->nlmsg_type != RTM_NEWADDR)
838 return NL_SKIP;
839
840 cb = check_ifaddr;
841 break;
842 case RTM_GETROUTE:
843 type = RTM_DELROUTE;
844 if (hdr->nlmsg_type != RTM_NEWROUTE)
845 return NL_SKIP;
846
847 cb = check_route;
848 break;
849 case RTM_GETRULE:
850 type = RTM_DELRULE;
851 if (hdr->nlmsg_type != RTM_NEWRULE)
852 return NL_SKIP;
853
854 cb = check_rule;
855 break;
856 default:
857 return NL_SKIP;
858 }
859
860 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
861 return NL_SKIP;
862
863 if (type == RTM_DELRULE)
864 D(SYSTEM, "Remove a rule\n");
865 else
866 D(SYSTEM, "Remove %s from device %s\n",
867 type == RTM_DELADDR ? "an address" : "a route",
868 clr->dev->ifname);
869 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
870 hdr = nlmsg_hdr(clr->msg);
871 hdr->nlmsg_type = type;
872 hdr->nlmsg_flags = NLM_F_REQUEST;
873
874 nl_socket_disable_auto_ack(sock_rtnl);
875 nl_send_auto_complete(sock_rtnl, clr->msg);
876 nl_socket_enable_auto_ack(sock_rtnl);
877
878 return NL_SKIP;
879 }
880
881 static int
882 cb_finish_event(struct nl_msg *msg, void *arg)
883 {
884 int *pending = arg;
885 *pending = 0;
886 return NL_STOP;
887 }
888
889 static int
890 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
891 {
892 int *pending = arg;
893 *pending = err->error;
894 return NL_STOP;
895 }
896
897 static void
898 system_if_clear_entries(struct device *dev, int type, int af)
899 {
900 struct clear_data clr;
901 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
902 struct rtmsg rtm = {
903 .rtm_family = af,
904 .rtm_flags = RTM_F_CLONED,
905 };
906 int flags = NLM_F_DUMP;
907 int pending = 1;
908
909 clr.af = af;
910 clr.dev = dev;
911 clr.type = type;
912 switch (type) {
913 case RTM_GETADDR:
914 case RTM_GETRULE:
915 clr.size = sizeof(struct rtgenmsg);
916 break;
917 case RTM_GETROUTE:
918 clr.size = sizeof(struct rtmsg);
919 break;
920 default:
921 return;
922 }
923
924 if (!cb)
925 return;
926
927 clr.msg = nlmsg_alloc_simple(type, flags);
928 if (!clr.msg)
929 goto out;
930
931 nlmsg_append(clr.msg, &rtm, clr.size, 0);
932 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
933 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
934 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
935
936 nl_send_auto_complete(sock_rtnl, clr.msg);
937 while (pending > 0)
938 nl_recvmsgs(sock_rtnl, cb);
939
940 nlmsg_free(clr.msg);
941 out:
942 nl_cb_put(cb);
943 }
944
945 /*
946 * Clear bridge (membership) state and bring down device
947 */
948 void system_if_clear_state(struct device *dev)
949 {
950 static char buf[256];
951 char *bridge;
952
953 device_set_ifindex(dev, system_if_resolve(dev));
954 if (dev->external || !dev->ifindex)
955 return;
956
957 system_if_flags(dev->ifname, 0, IFF_UP);
958
959 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
960 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
961 system_bridge_delbr(dev);
962 return;
963 }
964
965 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
966 if (bridge) {
967 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
968 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
969 }
970
971 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
972 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
973 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
974 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
975 system_set_disable_ipv6(dev, "0");
976 }
977
978 static inline unsigned long
979 sec_to_jiffies(int val)
980 {
981 return (unsigned long) val * 100;
982 }
983
984 static void system_bridge_conf_multicast_deps(struct device *bridge,
985 struct bridge_config *cfg,
986 char *buf,
987 int buf_len)
988 {
989 int val;
990
991 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
992 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
993 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
994 val = cfg->robustness * cfg->query_interval +
995 cfg->query_response_interval;
996
997 snprintf(buf, buf_len, "%i", val);
998 system_bridge_set_membership_interval(bridge, buf);
999
1000 val = cfg->robustness * cfg->query_interval +
1001 cfg->query_response_interval / 2;
1002
1003 snprintf(buf, buf_len, "%i", val);
1004 system_bridge_set_other_querier_timeout(bridge, buf);
1005 }
1006
1007 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1008 val = cfg->query_interval / 4;
1009
1010 snprintf(buf, buf_len, "%i", val);
1011 system_bridge_set_startup_query_interval(bridge, buf);
1012 }
1013 }
1014
1015 static void system_bridge_conf_multicast(struct device *bridge,
1016 struct bridge_config *cfg,
1017 char *buf,
1018 int buf_len)
1019 {
1020 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1021 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1022
1023 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1024 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1025
1026 snprintf(buf, buf_len, "%i", cfg->hash_max);
1027 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1028 bridge->ifname, buf);
1029
1030 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1031 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1032 system_bridge_set_multicast_router(bridge, buf, true);
1033 }
1034
1035 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1036 snprintf(buf, buf_len, "%i", cfg->robustness);
1037 system_bridge_set_robustness(bridge, buf);
1038 }
1039
1040 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1041 snprintf(buf, buf_len, "%i", cfg->query_interval);
1042 system_bridge_set_query_interval(bridge, buf);
1043 }
1044
1045 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1046 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1047 system_bridge_set_query_response_interval(bridge, buf);
1048 }
1049
1050 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1051 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1052 system_bridge_set_last_member_interval(bridge, buf);
1053 }
1054
1055 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1056 }
1057
1058 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1059 {
1060 char buf[64];
1061 unsigned long args[4] = {};
1062
1063 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1064 return -1;
1065
1066 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1067 args[1] = !!cfg->stp;
1068 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1069
1070 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1071 args[1] = sec_to_jiffies(cfg->forward_delay);
1072 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1073
1074 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1075
1076 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1077 args[1] = cfg->priority;
1078 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1079
1080 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1081 args[0] = BRCTL_SET_AGEING_TIME;
1082 args[1] = sec_to_jiffies(cfg->ageing_time);
1083 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1084 }
1085
1086 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1087 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1088 args[1] = sec_to_jiffies(cfg->hello_time);
1089 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1090 }
1091
1092 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1093 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1094 args[1] = sec_to_jiffies(cfg->max_age);
1095 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1096 }
1097
1098 return 0;
1099 }
1100
1101 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1102 {
1103 struct nl_msg *msg;
1104 struct nlattr *linkinfo, *data;
1105 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1106 int i, rv;
1107 static const struct {
1108 const char *name;
1109 enum macvlan_mode val;
1110 } modes[] = {
1111 { "private", MACVLAN_MODE_PRIVATE },
1112 { "vepa", MACVLAN_MODE_VEPA },
1113 { "bridge", MACVLAN_MODE_BRIDGE },
1114 { "passthru", MACVLAN_MODE_PASSTHRU },
1115 };
1116
1117 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1118
1119 if (!msg)
1120 return -1;
1121
1122 nlmsg_append(msg, &iim, sizeof(iim), 0);
1123
1124 if (cfg->flags & MACVLAN_OPT_MACADDR)
1125 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1126 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1127 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1128
1129 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1130 goto nla_put_failure;
1131
1132 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1133
1134 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1135 goto nla_put_failure;
1136
1137 if (cfg->mode) {
1138 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1139 if (strcmp(cfg->mode, modes[i].name) != 0)
1140 continue;
1141
1142 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1143 break;
1144 }
1145 }
1146
1147 nla_nest_end(msg, data);
1148 nla_nest_end(msg, linkinfo);
1149
1150 rv = system_rtnl_call(msg);
1151 if (rv)
1152 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1153
1154 return rv;
1155
1156 nla_put_failure:
1157 nlmsg_free(msg);
1158 return -ENOMEM;
1159 }
1160
1161 static int system_link_del(const char *ifname)
1162 {
1163 struct nl_msg *msg;
1164 struct ifinfomsg iim = {
1165 .ifi_family = AF_UNSPEC,
1166 .ifi_index = 0,
1167 };
1168
1169 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1170
1171 if (!msg)
1172 return -1;
1173
1174 nlmsg_append(msg, &iim, sizeof(iim), 0);
1175 nla_put_string(msg, IFLA_IFNAME, ifname);
1176 return system_rtnl_call(msg);
1177 }
1178
1179 int system_macvlan_del(struct device *macvlan)
1180 {
1181 return system_link_del(macvlan->ifname);
1182 }
1183
1184 int system_veth_add(struct device *veth, struct veth_config *cfg)
1185 {
1186 struct nl_msg *msg;
1187 struct ifinfomsg empty_iim = {};
1188 struct nlattr *linkinfo, *data, *veth_info;
1189 int rv;
1190
1191 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1192
1193 if (!msg)
1194 return -1;
1195
1196 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1197
1198 if (cfg->flags & VETH_OPT_MACADDR)
1199 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1200 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1201
1202 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1203 goto nla_put_failure;
1204
1205 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1206
1207 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1208 goto nla_put_failure;
1209
1210 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1211 goto nla_put_failure;
1212
1213 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1214
1215 if (cfg->flags & VETH_OPT_PEER_NAME)
1216 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1217 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1218 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1219
1220 nla_nest_end(msg, veth_info);
1221 nla_nest_end(msg, data);
1222 nla_nest_end(msg, linkinfo);
1223
1224 rv = system_rtnl_call(msg);
1225 if (rv) {
1226 if (cfg->flags & VETH_OPT_PEER_NAME)
1227 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1228 else
1229 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1230 }
1231
1232 return rv;
1233
1234 nla_put_failure:
1235 nlmsg_free(msg);
1236 return -ENOMEM;
1237 }
1238
1239 int system_veth_del(struct device *veth)
1240 {
1241 return system_link_del(veth->ifname);
1242 }
1243
1244 static int system_vlan(struct device *dev, int id)
1245 {
1246 struct vlan_ioctl_args ifr = {
1247 .cmd = SET_VLAN_NAME_TYPE_CMD,
1248 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1249 };
1250
1251 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1252
1253 if (id < 0) {
1254 ifr.cmd = DEL_VLAN_CMD;
1255 ifr.u.VID = 0;
1256 } else {
1257 ifr.cmd = ADD_VLAN_CMD;
1258 ifr.u.VID = id;
1259 }
1260 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1261 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1262 }
1263
1264 int system_vlan_add(struct device *dev, int id)
1265 {
1266 return system_vlan(dev, id);
1267 }
1268
1269 int system_vlan_del(struct device *dev)
1270 {
1271 return system_vlan(dev, -1);
1272 }
1273
1274 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1275 {
1276 struct nl_msg *msg;
1277 struct nlattr *linkinfo, *data;
1278 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1279 int rv;
1280
1281 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1282
1283 if (!msg)
1284 return -1;
1285
1286 nlmsg_append(msg, &iim, sizeof(iim), 0);
1287 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1288 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1289
1290 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1291 goto nla_put_failure;
1292
1293 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1294
1295 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1296 goto nla_put_failure;
1297
1298 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1299
1300 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1301 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1302 #else
1303 if(cfg->proto == VLAN_PROTO_8021AD)
1304 netifd_log_message(L_WARNING, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev->type->name);
1305 #endif
1306
1307 nla_nest_end(msg, data);
1308 nla_nest_end(msg, linkinfo);
1309
1310 rv = system_rtnl_call(msg);
1311 if (rv)
1312 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1313
1314 return rv;
1315
1316 nla_put_failure:
1317 nlmsg_free(msg);
1318 return -ENOMEM;
1319 }
1320
1321 int system_vlandev_del(struct device *vlandev)
1322 {
1323 return system_link_del(vlandev->ifname);
1324 }
1325
1326 void
1327 system_if_get_settings(struct device *dev, struct device_settings *s)
1328 {
1329 struct ifreq ifr;
1330 char buf[10];
1331
1332 memset(&ifr, 0, sizeof(ifr));
1333 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1334
1335 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1336 s->mtu = ifr.ifr_mtu;
1337 s->flags |= DEV_OPT_MTU;
1338 }
1339
1340 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1341 if (s->mtu6 > 0)
1342 s->flags |= DEV_OPT_MTU6;
1343
1344 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1345 s->txqueuelen = ifr.ifr_qlen;
1346 s->flags |= DEV_OPT_TXQUEUELEN;
1347 }
1348
1349 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1350 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1351 s->flags |= DEV_OPT_MACADDR;
1352 }
1353
1354 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1355 s->ipv6 = !strtoul(buf, NULL, 0);
1356 s->flags |= DEV_OPT_IPV6;
1357 }
1358
1359 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1360 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1361 s->flags |= DEV_OPT_PROMISC;
1362
1363 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1364 s->flags |= DEV_OPT_MULTICAST;
1365 }
1366
1367 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1368 s->rpfilter = strtoul(buf, NULL, 0);
1369 s->flags |= DEV_OPT_RPFILTER;
1370 }
1371
1372 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1373 s->acceptlocal = strtoul(buf, NULL, 0);
1374 s->flags |= DEV_OPT_ACCEPTLOCAL;
1375 }
1376
1377 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1378 s->igmpversion = strtoul(buf, NULL, 0);
1379 s->flags |= DEV_OPT_IGMPVERSION;
1380 }
1381
1382 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1383 s->mldversion = strtoul(buf, NULL, 0);
1384 s->flags |= DEV_OPT_MLDVERSION;
1385 }
1386
1387 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1388 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1389 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1390 }
1391
1392 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1393 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1394 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1395 }
1396
1397 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1398 s->neigh4locktime = strtol(buf, NULL, 0);
1399 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1400 }
1401
1402 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1403 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1404 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1405 }
1406
1407 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1408 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1409 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1410 }
1411
1412 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1413 s->dadtransmits = strtoul(buf, NULL, 0);
1414 s->flags |= DEV_OPT_DADTRANSMITS;
1415 }
1416
1417 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1418 s->sendredirects = strtoul(buf, NULL, 0);
1419 s->flags |= DEV_OPT_SENDREDIRECTS;
1420 }
1421 }
1422
1423 void
1424 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1425 {
1426 struct ifreq ifr;
1427 char buf[12];
1428
1429 memset(&ifr, 0, sizeof(ifr));
1430 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1431 if (s->flags & DEV_OPT_MTU & apply_mask) {
1432 ifr.ifr_mtu = s->mtu;
1433 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1434 s->flags &= ~DEV_OPT_MTU;
1435 }
1436 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1437 system_update_ipv6_mtu(dev, s->mtu6);
1438 }
1439 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1440 ifr.ifr_qlen = s->txqueuelen;
1441 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1442 s->flags &= ~DEV_OPT_TXQUEUELEN;
1443 }
1444 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1445 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1446 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1447 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1448 s->flags &= ~DEV_OPT_MACADDR;
1449 }
1450 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1451 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1452 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1453 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1454 !s->promisc ? IFF_PROMISC : 0) < 0)
1455 s->flags &= ~DEV_OPT_PROMISC;
1456 }
1457 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1458 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1459 system_set_rpfilter(dev, buf);
1460 }
1461 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1462 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1463 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1464 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1465 system_set_igmpversion(dev, buf);
1466 }
1467 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1468 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1469 system_set_mldversion(dev, buf);
1470 }
1471 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1472 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1473 system_set_neigh4reachabletime(dev, buf);
1474 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1475 system_set_neigh6reachabletime(dev, buf);
1476 }
1477 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1478 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1479 system_set_neigh4locktime(dev, buf);
1480 }
1481 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1482 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1483 system_set_neigh4gcstaletime(dev, buf);
1484 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1485 system_set_neigh6gcstaletime(dev, buf);
1486 }
1487 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1488 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1489 system_set_dadtransmits(dev, buf);
1490 }
1491 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1492 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1493 !s->multicast ? IFF_MULTICAST : 0) < 0)
1494 s->flags &= ~DEV_OPT_MULTICAST;
1495 }
1496 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1497 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1498 }
1499
1500 int system_if_up(struct device *dev)
1501 {
1502 system_if_get_settings(dev, &dev->orig_settings);
1503 /* Only keep orig settings based on what needs to be set */
1504 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1505 dev->orig_settings.flags &= dev->settings.flags;
1506 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1507 return system_if_flags(dev->ifname, IFF_UP, 0);
1508 }
1509
1510 int system_if_down(struct device *dev)
1511 {
1512 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1513 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1514 return ret;
1515 }
1516
1517 struct if_check_data {
1518 struct device *dev;
1519 int pending;
1520 int ret;
1521 };
1522
1523 #ifndef IFF_LOWER_UP
1524 #define IFF_LOWER_UP 0x10000
1525 #endif
1526
1527 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1528 {
1529 struct nlmsghdr *nh = nlmsg_hdr(msg);
1530 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1531 struct if_check_data *chk = (struct if_check_data *)arg;
1532
1533 if (nh->nlmsg_type != RTM_NEWLINK)
1534 return NL_SKIP;
1535
1536 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1537 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1538
1539 return NL_OK;
1540 }
1541
1542 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1543 {
1544 struct if_check_data *chk = (struct if_check_data *)arg;
1545 chk->pending = 0;
1546 return NL_STOP;
1547 }
1548
1549 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1550 {
1551 struct if_check_data *chk = (struct if_check_data *)arg;
1552
1553 device_set_present(chk->dev, false);
1554 device_set_link(chk->dev, false);
1555 chk->pending = err->error;
1556
1557 return NL_STOP;
1558 }
1559
1560 int system_if_check(struct device *dev)
1561 {
1562 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1563 struct nl_msg *msg;
1564 struct ifinfomsg ifi = {
1565 .ifi_family = AF_UNSPEC,
1566 .ifi_index = 0,
1567 };
1568 struct if_check_data chk = {
1569 .dev = dev,
1570 .pending = 1,
1571 };
1572 int ret = 1;
1573
1574 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1575 if (!msg)
1576 goto out;
1577
1578 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1579 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1580 goto free;
1581
1582 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1583 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1584 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1585
1586 nl_send_auto_complete(sock_rtnl, msg);
1587 while (chk.pending > 0)
1588 nl_recvmsgs(sock_rtnl, cb);
1589
1590 ret = chk.pending;
1591
1592 free:
1593 nlmsg_free(msg);
1594 out:
1595 nl_cb_put(cb);
1596 return ret;
1597 }
1598
1599 struct device *
1600 system_if_get_parent(struct device *dev)
1601 {
1602 char buf[64], *devname;
1603 int ifindex, iflink, len;
1604 FILE *f;
1605
1606 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1607 f = fopen(buf, "r");
1608 if (!f)
1609 return NULL;
1610
1611 len = fread(buf, 1, sizeof(buf) - 1, f);
1612 fclose(f);
1613
1614 if (len <= 0)
1615 return NULL;
1616
1617 buf[len] = 0;
1618 iflink = strtoul(buf, NULL, 0);
1619 ifindex = system_if_resolve(dev);
1620 if (!iflink || iflink == ifindex)
1621 return NULL;
1622
1623 devname = if_indextoname(iflink, buf);
1624 if (!devname)
1625 return NULL;
1626
1627 return device_get(devname, true);
1628 }
1629
1630 static bool
1631 read_string_file(int dir_fd, const char *file, char *buf, int len)
1632 {
1633 bool ret = false;
1634 char *c;
1635 int fd;
1636
1637 fd = openat(dir_fd, file, O_RDONLY);
1638 if (fd < 0)
1639 return false;
1640
1641 retry:
1642 len = read(fd, buf, len - 1);
1643 if (len < 0) {
1644 if (errno == EINTR)
1645 goto retry;
1646 } else if (len > 0) {
1647 buf[len] = 0;
1648
1649 c = strchr(buf, '\n');
1650 if (c)
1651 *c = 0;
1652
1653 ret = true;
1654 }
1655
1656 close(fd);
1657
1658 return ret;
1659 }
1660
1661 static bool
1662 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1663 {
1664 char buf[64];
1665 bool ret = false;
1666
1667 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1668 if (ret)
1669 *val = strtoull(buf, NULL, 0);
1670
1671 return ret;
1672 }
1673
1674 /* Assume advertised flags == supported flags */
1675 static const struct {
1676 uint32_t mask;
1677 const char *name;
1678 } ethtool_link_modes[] = {
1679 { ADVERTISED_10baseT_Half, "10H" },
1680 { ADVERTISED_10baseT_Full, "10F" },
1681 { ADVERTISED_100baseT_Half, "100H" },
1682 { ADVERTISED_100baseT_Full, "100F" },
1683 { ADVERTISED_1000baseT_Half, "1000H" },
1684 { ADVERTISED_1000baseT_Full, "1000F" },
1685 };
1686
1687 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1688 {
1689 int i;
1690 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1691 if (mask & ethtool_link_modes[i].mask)
1692 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1693 }
1694 }
1695
1696 bool
1697 system_if_force_external(const char *ifname)
1698 {
1699 char buf[64];
1700 struct stat s;
1701
1702 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1703 return stat(buf, &s) == 0;
1704 }
1705
1706 int
1707 system_if_dump_info(struct device *dev, struct blob_buf *b)
1708 {
1709 struct ethtool_cmd ecmd;
1710 struct ifreq ifr;
1711 char buf[64], *s;
1712 void *c;
1713 int dir_fd;
1714
1715 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1716 dir_fd = open(buf, O_DIRECTORY);
1717
1718 memset(&ecmd, 0, sizeof(ecmd));
1719 memset(&ifr, 0, sizeof(ifr));
1720 strcpy(ifr.ifr_name, dev->ifname);
1721 ifr.ifr_data = (caddr_t) &ecmd;
1722 ecmd.cmd = ETHTOOL_GSET;
1723
1724 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1725 c = blobmsg_open_array(b, "link-advertising");
1726 system_add_link_modes(b, ecmd.advertising);
1727 blobmsg_close_array(b, c);
1728
1729 c = blobmsg_open_array(b, "link-supported");
1730 system_add_link_modes(b, ecmd.supported);
1731 blobmsg_close_array(b, c);
1732
1733 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1734 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1735 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1736 blobmsg_add_string_buffer(b);
1737 }
1738
1739 close(dir_fd);
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 nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2324 struct blob_attr *dcur;
2325 unsigned drem, fmrcnt = 0;
2326
2327 blobmsg_for_each_attr(dcur, cur, drem) {
2328 if (blobmsg_type(dcur) != BLOBMSG_TYPE_ARRAY ||
2329 strcmp(blobmsg_name(dcur), "fmrs") ||
2330 blobmsg_check_array(dcur, BLOBMSG_TYPE_UNSPEC) <= 0)
2331 continue;
2332
2333 struct blob_attr *rcur;
2334 unsigned rrem;
2335 blobmsg_for_each_attr(rcur, dcur, rrem) {
2336 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2337 struct in6_addr ip6prefix;
2338 struct in_addr ip4prefix;
2339 unsigned ip4len, ip6len, ealen, offset;
2340
2341 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2342 blobmsg_data(rcur), blobmsg_len(rcur));
2343
2344 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2345 !parse_ip_and_netmask(AF_INET6,
2346 blobmsg_data(tb_cur), &ip6prefix,
2347 &ip6len)) {
2348 ret = -EINVAL;
2349 goto failure;
2350 }
2351
2352 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2353 !parse_ip_and_netmask(AF_INET,
2354 blobmsg_data(tb_cur), &ip4prefix,
2355 &ip4len)) {
2356 ret = -EINVAL;
2357 goto failure;
2358 }
2359
2360 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2361 ret = -EINVAL;
2362 goto failure;
2363 }
2364 ealen = blobmsg_get_u32(tb_cur);
2365
2366 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2367 ret = -EINVAL;
2368 goto failure;
2369 }
2370 offset = blobmsg_get_u32(tb_cur);
2371
2372 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2373
2374 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2375 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2376 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2377 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2378 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2379 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2380
2381 nla_nest_end(nlm, rule);
2382 }
2383 }
2384 nla_nest_end(nlm, fmrs);
2385 }
2386 #endif
2387
2388 nla_nest_end(nlm, infodata);
2389 nla_nest_end(nlm, linkinfo);
2390
2391 return system_rtnl_call(nlm);
2392
2393 failure:
2394 nlmsg_free(nlm);
2395 return ret;
2396 }
2397 #endif
2398
2399 #ifdef IFLA_IPTUN_MAX
2400 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2401 static int system_add_gre_tunnel(const char *name, const char *kind,
2402 const unsigned int link, struct blob_attr **tb, bool v6)
2403 {
2404 struct nl_msg *nlm;
2405 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2406 struct blob_attr *cur;
2407 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2408 uint16_t iflags = 0, oflags = 0;
2409 uint8_t tos = 0;
2410 int ret = 0, ttl = 0;
2411
2412 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2413 if (!nlm)
2414 return -1;
2415
2416 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2417 nla_put_string(nlm, IFLA_IFNAME, name);
2418
2419 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2420 if (!linkinfo) {
2421 ret = -ENOMEM;
2422 goto failure;
2423 }
2424
2425 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2426 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2427 if (!infodata) {
2428 ret = -ENOMEM;
2429 goto failure;
2430 }
2431
2432 if (link)
2433 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2434
2435 if ((cur = tb[TUNNEL_ATTR_TTL]))
2436 ttl = blobmsg_get_u32(cur);
2437
2438 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2439 char *str = blobmsg_get_string(cur);
2440 if (strcmp(str, "inherit")) {
2441 unsigned uval;
2442
2443 if (!system_tos_aton(str, &uval)) {
2444 ret = -EINVAL;
2445 goto failure;
2446 }
2447
2448 if (v6)
2449 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2450 else
2451 tos = uval;
2452 } else {
2453 if (v6)
2454 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2455 else
2456 tos = 1;
2457 }
2458 }
2459
2460 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2461 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2462
2463 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2464 blobmsg_data(cur), blobmsg_len(cur));
2465
2466 if ((cur = tb_data[GRE_DATA_IKEY])) {
2467 if ((ikey = blobmsg_get_u32(cur)))
2468 iflags |= GRE_KEY;
2469 }
2470
2471 if ((cur = tb_data[GRE_DATA_OKEY])) {
2472 if ((okey = blobmsg_get_u32(cur)))
2473 oflags |= GRE_KEY;
2474 }
2475
2476 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2477 if (blobmsg_get_bool(cur))
2478 iflags |= GRE_CSUM;
2479 }
2480
2481 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2482 if (blobmsg_get_bool(cur))
2483 oflags |= GRE_CSUM;
2484 }
2485
2486 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2487 if (blobmsg_get_bool(cur))
2488 iflags |= GRE_SEQ;
2489 }
2490
2491 if ((cur = tb[GRE_DATA_OSEQNO])) {
2492 if (blobmsg_get_bool(cur))
2493 oflags |= GRE_SEQ;
2494 }
2495 }
2496
2497 if (v6) {
2498 struct in6_addr in6buf;
2499 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2500 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2501 ret = -EINVAL;
2502 goto failure;
2503 }
2504 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2505 }
2506
2507 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2508 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2509 ret = -EINVAL;
2510 goto failure;
2511 }
2512 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2513 }
2514 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2515
2516 if (flowinfo)
2517 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2518
2519 if (flags)
2520 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2521
2522 if (!ttl)
2523 ttl = 64;
2524 } else {
2525 struct in_addr inbuf;
2526 bool set_df = true;
2527
2528 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2529 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2530 ret = -EINVAL;
2531 goto failure;
2532 }
2533 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2534 }
2535
2536 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2537 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2538 ret = -EINVAL;
2539 goto failure;
2540 }
2541 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2542
2543 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2544 if (!okey) {
2545 okey = inbuf.s_addr;
2546 oflags |= GRE_KEY;
2547 }
2548
2549 if (!ikey) {
2550 ikey = inbuf.s_addr;
2551 iflags |= GRE_KEY;
2552 }
2553 }
2554 }
2555
2556 if ((cur = tb[TUNNEL_ATTR_DF]))
2557 set_df = blobmsg_get_bool(cur);
2558
2559 if (!set_df) {
2560 /* ttl != 0 and nopmtudisc are incompatible */
2561 if (ttl) {
2562 ret = -EINVAL;
2563 goto failure;
2564 }
2565 } else if (!ttl)
2566 ttl = 64;
2567
2568 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2569
2570 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2571 }
2572
2573 if (ttl)
2574 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2575
2576 if (oflags)
2577 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2578
2579 if (iflags)
2580 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2581
2582 if (okey)
2583 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2584
2585 if (ikey)
2586 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2587
2588 nla_nest_end(nlm, infodata);
2589 nla_nest_end(nlm, linkinfo);
2590
2591 return system_rtnl_call(nlm);
2592
2593 failure:
2594 nlmsg_free(nlm);
2595 return ret;
2596 }
2597 #endif
2598
2599 #ifdef IFLA_VTI_MAX
2600 static int system_add_vti_tunnel(const char *name, const char *kind,
2601 const unsigned int link, struct blob_attr **tb, bool v6)
2602 {
2603 struct nl_msg *nlm;
2604 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2605 struct blob_attr *cur;
2606 int ret = 0;
2607
2608 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2609 if (!nlm)
2610 return -1;
2611
2612 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2613 nla_put_string(nlm, IFLA_IFNAME, name);
2614
2615 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2616 if (!linkinfo) {
2617 ret = -ENOMEM;
2618 goto failure;
2619 }
2620
2621 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2622 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2623 if (!infodata) {
2624 ret = -ENOMEM;
2625 goto failure;
2626 }
2627
2628 if (link)
2629 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2630
2631 if (v6) {
2632 struct in6_addr in6buf;
2633 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2634 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2635 ret = -EINVAL;
2636 goto failure;
2637 }
2638 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2639 }
2640
2641 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2642 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2643 ret = -EINVAL;
2644 goto failure;
2645 }
2646 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2647 }
2648
2649 } else {
2650 struct in_addr inbuf;
2651
2652 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2653 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2654 ret = -EINVAL;
2655 goto failure;
2656 }
2657 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2658 }
2659
2660 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2661 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2662 ret = -EINVAL;
2663 goto failure;
2664 }
2665 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2666 }
2667
2668 }
2669
2670 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2671 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2672 uint32_t ikey = 0, okey = 0;
2673
2674 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2675 blobmsg_data(cur), blobmsg_len(cur));
2676
2677 if ((cur = tb_data[VTI_DATA_IKEY])) {
2678 if ((ikey = blobmsg_get_u32(cur)))
2679 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2680 }
2681
2682 if ((cur = tb_data[VTI_DATA_OKEY])) {
2683 if ((okey = blobmsg_get_u32(cur)))
2684 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2685 }
2686 }
2687
2688 nla_nest_end(nlm, infodata);
2689 nla_nest_end(nlm, linkinfo);
2690
2691 return system_rtnl_call(nlm);
2692
2693 failure:
2694 nlmsg_free(nlm);
2695 return ret;
2696 }
2697 #endif
2698
2699 #ifdef IFLA_VXLAN_MAX
2700 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2701 {
2702 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2703 struct nl_msg *msg;
2704 struct nlattr *linkinfo, *data;
2705 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2706 struct blob_attr *cur;
2707 int ret = 0;
2708
2709 if ((cur = tb[TUNNEL_ATTR_DATA]))
2710 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2711 blobmsg_data(cur), blobmsg_len(cur));
2712 else
2713 return -EINVAL;
2714
2715 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2716
2717 if (!msg)
2718 return -1;
2719
2720 nlmsg_append(msg, &iim, sizeof(iim), 0);
2721
2722 nla_put_string(msg, IFLA_IFNAME, name);
2723
2724 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2725 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2726 if (!ea) {
2727 ret = -EINVAL;
2728 goto failure;
2729 }
2730
2731 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2732 }
2733
2734 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2735 uint32_t mtu = blobmsg_get_u32(cur);
2736 nla_put_u32(msg, IFLA_MTU, mtu);
2737 }
2738
2739 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2740 ret = -ENOMEM;
2741 goto failure;
2742 }
2743
2744 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2745
2746 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2747 ret = -ENOMEM;
2748 goto failure;
2749 }
2750
2751 if (link)
2752 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2753
2754 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2755 uint32_t id = blobmsg_get_u32(cur);
2756 if (id >= (1u << 24) - 1) {
2757 ret = -EINVAL;
2758 goto failure;
2759 }
2760
2761 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2762 }
2763
2764 if (v6) {
2765 struct in6_addr in6buf;
2766 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2767 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2768 ret = -EINVAL;
2769 goto failure;
2770 }
2771 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2772 }
2773
2774 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2775 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2776 ret = -EINVAL;
2777 goto failure;
2778 }
2779 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2780 }
2781 } else {
2782 struct in_addr inbuf;
2783
2784 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2785 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2786 ret = -EINVAL;
2787 goto failure;
2788 }
2789 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2790 }
2791
2792 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2793 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2794 ret = -EINVAL;
2795 goto failure;
2796 }
2797 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2798 }
2799 }
2800
2801 uint32_t port = 4789;
2802 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2803 port = blobmsg_get_u32(cur);
2804 if (port < 1 || port > 65535) {
2805 ret = -EINVAL;
2806 goto failure;
2807 }
2808 }
2809 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2810
2811 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2812 bool rxcsum = blobmsg_get_bool(cur);
2813 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2814 }
2815
2816 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
2817 bool txcsum = blobmsg_get_bool(cur);
2818 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
2819 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
2820 }
2821
2822 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2823 char *str = blobmsg_get_string(cur);
2824 unsigned tos = 1;
2825
2826 if (strcmp(str, "inherit")) {
2827 if (!system_tos_aton(str, &tos)) {
2828 ret = -EINVAL;
2829 goto failure;
2830 }
2831 }
2832
2833 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2834 }
2835
2836 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2837 uint32_t ttl = blobmsg_get_u32(cur);
2838 if (ttl < 1 || ttl > 255) {
2839 ret = -EINVAL;
2840 goto failure;
2841 }
2842
2843 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2844 }
2845
2846 nla_nest_end(msg, data);
2847 nla_nest_end(msg, linkinfo);
2848
2849 ret = system_rtnl_call(msg);
2850 if (ret)
2851 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2852
2853 return ret;
2854
2855 failure:
2856 nlmsg_free(msg);
2857 return ret;
2858 }
2859 #endif
2860
2861 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2862 {
2863 struct blob_attr *cur;
2864 int ret = 0;
2865
2866 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2867 return -1;
2868
2869 #ifdef SIOCADD6RD
2870 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2871 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2872 unsigned int mask;
2873 struct ip_tunnel_6rd p6;
2874
2875 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2876 blobmsg_data(cur), blobmsg_len(cur));
2877
2878 memset(&p6, 0, sizeof(p6));
2879
2880 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2881 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2882 &p6.prefix, &mask) || mask > 128) {
2883 ret = -EINVAL;
2884 goto failure;
2885 }
2886
2887 p6.prefixlen = mask;
2888 }
2889
2890 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2891 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2892 &p6.relay_prefix, &mask) || mask > 32) {
2893 ret = -EINVAL;
2894 goto failure;
2895 }
2896
2897 p6.relay_prefixlen = mask;
2898 }
2899
2900 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2901 ret = -1;
2902 goto failure;
2903 }
2904 }
2905 #endif
2906
2907 return ret;
2908
2909 failure:
2910 __system_del_ip_tunnel(name, tb);
2911 return ret;
2912 }
2913
2914 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2915 {
2916 struct blob_attr *cur;
2917 bool set_df = true;
2918 struct ip_tunnel_parm p = {
2919 .link = link,
2920 .iph = {
2921 .version = 4,
2922 .ihl = 5,
2923 .protocol = proto,
2924 }
2925 };
2926
2927 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2928 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2929 return -EINVAL;
2930
2931 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2932 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2933 return -EINVAL;
2934
2935 if ((cur = tb[TUNNEL_ATTR_DF]))
2936 set_df = blobmsg_get_bool(cur);
2937
2938 if ((cur = tb[TUNNEL_ATTR_TTL]))
2939 p.iph.ttl = blobmsg_get_u32(cur);
2940
2941 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2942 char *str = blobmsg_get_string(cur);
2943 if (strcmp(str, "inherit")) {
2944 unsigned uval;
2945
2946 if (!system_tos_aton(str, &uval))
2947 return -EINVAL;
2948
2949 p.iph.tos = uval;
2950 } else
2951 p.iph.tos = 1;
2952 }
2953
2954 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2955 /* ttl !=0 and nopmtudisc are incompatible */
2956 if (p.iph.ttl && p.iph.frag_off == 0)
2957 return -EINVAL;
2958
2959 strncpy(p.name, name, sizeof(p.name));
2960
2961 switch (p.iph.protocol) {
2962 case IPPROTO_IPIP:
2963 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2964 case IPPROTO_IPV6:
2965 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2966 default:
2967 break;
2968 }
2969 return -1;
2970 }
2971
2972 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2973 {
2974 struct blob_attr *cur;
2975 const char *str;
2976
2977 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2978 return -EINVAL;
2979 str = blobmsg_data(cur);
2980
2981 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2982 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2983 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2984 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2985 return system_link_del(name);
2986 else
2987 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2988 }
2989
2990 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2991 {
2992 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2993
2994 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2995 blob_data(attr), blob_len(attr));
2996
2997 return __system_del_ip_tunnel(name, tb);
2998 }
2999
3000 int system_update_ipv6_mtu(struct device *dev, int mtu)
3001 {
3002 int ret = -1;
3003 char buf[64];
3004 int fd;
3005
3006 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3007 dev->ifname);
3008
3009 fd = open(buf, O_RDWR);
3010 if (fd < 0)
3011 return ret;
3012
3013 if (!mtu) {
3014 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3015 if (len < 0)
3016 goto out;
3017
3018 buf[len] = 0;
3019 ret = atoi(buf);
3020 } else {
3021 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3022 ret = mtu;
3023 }
3024
3025 out:
3026 close(fd);
3027 return ret;
3028 }
3029
3030 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3031 {
3032 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3033 struct blob_attr *cur;
3034 const char *str;
3035
3036 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3037 blob_data(attr), blob_len(attr));
3038
3039 __system_del_ip_tunnel(name, tb);
3040
3041 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3042 return -EINVAL;
3043 str = blobmsg_data(cur);
3044
3045 unsigned int ttl = 0;
3046 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3047 ttl = blobmsg_get_u32(cur);
3048 if (ttl > 255)
3049 return -EINVAL;
3050 }
3051
3052 unsigned int link = 0;
3053 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3054 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3055 if (!iface)
3056 return -EINVAL;
3057
3058 if (iface->l3_dev.dev)
3059 link = iface->l3_dev.dev->ifindex;
3060 }
3061
3062 if (!strcmp(str, "sit"))
3063 return system_add_sit_tunnel(name, link, tb);
3064 #ifdef IFLA_IPTUN_MAX
3065 else if (!strcmp(str, "ipip6")) {
3066 return system_add_ip6_tunnel(name, link, tb);
3067 } else if (!strcmp(str, "greip")) {
3068 return system_add_gre_tunnel(name, "gre", link, tb, false);
3069 } else if (!strcmp(str, "gretapip")) {
3070 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3071 } else if (!strcmp(str, "greip6")) {
3072 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3073 } else if (!strcmp(str, "gretapip6")) {
3074 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3075 #ifdef IFLA_VTI_MAX
3076 } else if (!strcmp(str, "vtiip")) {
3077 return system_add_vti_tunnel(name, "vti", link, tb, false);
3078 } else if (!strcmp(str, "vtiip6")) {
3079 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3080 #endif
3081 #ifdef IFLA_VXLAN_MAX
3082 } else if(!strcmp(str, "vxlan")) {
3083 return system_add_vxlan(name, link, tb, false);
3084 } else if(!strcmp(str, "vxlan6")) {
3085 return system_add_vxlan(name, link, tb, true);
3086 #endif
3087 #endif
3088 } else if (!strcmp(str, "ipip")) {
3089 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3090 }
3091 else
3092 return -EINVAL;
3093
3094 return 0;
3095 }
OpenWrt Network interface configuration daemon