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system-linux: make encaplimit configurable for ip6 tunnels (FS#1501)
[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) - 1);
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) - 1);
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) - 1);
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 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1254 return -1;
1255
1256 if (id < 0) {
1257 ifr.cmd = DEL_VLAN_CMD;
1258 ifr.u.VID = 0;
1259 } else {
1260 ifr.cmd = ADD_VLAN_CMD;
1261 ifr.u.VID = id;
1262 }
1263 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1264 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1265 }
1266
1267 int system_vlan_add(struct device *dev, int id)
1268 {
1269 return system_vlan(dev, id);
1270 }
1271
1272 int system_vlan_del(struct device *dev)
1273 {
1274 return system_vlan(dev, -1);
1275 }
1276
1277 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1278 {
1279 struct nl_msg *msg;
1280 struct nlattr *linkinfo, *data;
1281 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1282 int rv;
1283
1284 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1285
1286 if (!msg)
1287 return -1;
1288
1289 nlmsg_append(msg, &iim, sizeof(iim), 0);
1290 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1291 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1292
1293 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1294 goto nla_put_failure;
1295
1296 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1297
1298 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1299 goto nla_put_failure;
1300
1301 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1302
1303 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1304 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1305 #else
1306 if(cfg->proto == VLAN_PROTO_8021AD)
1307 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);
1308 #endif
1309
1310 nla_nest_end(msg, data);
1311 nla_nest_end(msg, linkinfo);
1312
1313 rv = system_rtnl_call(msg);
1314 if (rv)
1315 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1316
1317 return rv;
1318
1319 nla_put_failure:
1320 nlmsg_free(msg);
1321 return -ENOMEM;
1322 }
1323
1324 int system_vlandev_del(struct device *vlandev)
1325 {
1326 return system_link_del(vlandev->ifname);
1327 }
1328
1329 void
1330 system_if_get_settings(struct device *dev, struct device_settings *s)
1331 {
1332 struct ifreq ifr;
1333 char buf[10];
1334
1335 memset(&ifr, 0, sizeof(ifr));
1336 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1337
1338 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1339 s->mtu = ifr.ifr_mtu;
1340 s->flags |= DEV_OPT_MTU;
1341 }
1342
1343 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1344 if (s->mtu6 > 0)
1345 s->flags |= DEV_OPT_MTU6;
1346
1347 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1348 s->txqueuelen = ifr.ifr_qlen;
1349 s->flags |= DEV_OPT_TXQUEUELEN;
1350 }
1351
1352 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1353 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1354 s->flags |= DEV_OPT_MACADDR;
1355 }
1356
1357 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1358 s->ipv6 = !strtoul(buf, NULL, 0);
1359 s->flags |= DEV_OPT_IPV6;
1360 }
1361
1362 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1363 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1364 s->flags |= DEV_OPT_PROMISC;
1365
1366 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1367 s->flags |= DEV_OPT_MULTICAST;
1368 }
1369
1370 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1371 s->rpfilter = strtoul(buf, NULL, 0);
1372 s->flags |= DEV_OPT_RPFILTER;
1373 }
1374
1375 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1376 s->acceptlocal = strtoul(buf, NULL, 0);
1377 s->flags |= DEV_OPT_ACCEPTLOCAL;
1378 }
1379
1380 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1381 s->igmpversion = strtoul(buf, NULL, 0);
1382 s->flags |= DEV_OPT_IGMPVERSION;
1383 }
1384
1385 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1386 s->mldversion = strtoul(buf, NULL, 0);
1387 s->flags |= DEV_OPT_MLDVERSION;
1388 }
1389
1390 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1391 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1392 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1393 }
1394
1395 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1396 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1397 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1398 }
1399
1400 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1401 s->neigh4locktime = strtol(buf, NULL, 0);
1402 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1403 }
1404
1405 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1406 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1407 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1408 }
1409
1410 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1411 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1412 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1413 }
1414
1415 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1416 s->dadtransmits = strtoul(buf, NULL, 0);
1417 s->flags |= DEV_OPT_DADTRANSMITS;
1418 }
1419
1420 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1421 s->sendredirects = strtoul(buf, NULL, 0);
1422 s->flags |= DEV_OPT_SENDREDIRECTS;
1423 }
1424 }
1425
1426 void
1427 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1428 {
1429 struct ifreq ifr;
1430 char buf[12];
1431
1432 memset(&ifr, 0, sizeof(ifr));
1433 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1434 if (s->flags & DEV_OPT_MTU & apply_mask) {
1435 ifr.ifr_mtu = s->mtu;
1436 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1437 s->flags &= ~DEV_OPT_MTU;
1438 }
1439 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1440 system_update_ipv6_mtu(dev, s->mtu6);
1441 }
1442 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1443 ifr.ifr_qlen = s->txqueuelen;
1444 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1445 s->flags &= ~DEV_OPT_TXQUEUELEN;
1446 }
1447 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1448 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1449 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1450 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1451 s->flags &= ~DEV_OPT_MACADDR;
1452 }
1453 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1454 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1455 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1456 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1457 !s->promisc ? IFF_PROMISC : 0) < 0)
1458 s->flags &= ~DEV_OPT_PROMISC;
1459 }
1460 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1461 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1462 system_set_rpfilter(dev, buf);
1463 }
1464 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1465 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1466 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1467 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1468 system_set_igmpversion(dev, buf);
1469 }
1470 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1471 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1472 system_set_mldversion(dev, buf);
1473 }
1474 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1475 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1476 system_set_neigh4reachabletime(dev, buf);
1477 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1478 system_set_neigh6reachabletime(dev, buf);
1479 }
1480 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1481 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1482 system_set_neigh4locktime(dev, buf);
1483 }
1484 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1485 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1486 system_set_neigh4gcstaletime(dev, buf);
1487 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1488 system_set_neigh6gcstaletime(dev, buf);
1489 }
1490 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1491 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1492 system_set_dadtransmits(dev, buf);
1493 }
1494 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1495 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1496 !s->multicast ? IFF_MULTICAST : 0) < 0)
1497 s->flags &= ~DEV_OPT_MULTICAST;
1498 }
1499 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1500 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1501 }
1502
1503 int system_if_up(struct device *dev)
1504 {
1505 system_if_get_settings(dev, &dev->orig_settings);
1506 /* Only keep orig settings based on what needs to be set */
1507 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1508 dev->orig_settings.flags &= dev->settings.flags;
1509 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1510 return system_if_flags(dev->ifname, IFF_UP, 0);
1511 }
1512
1513 int system_if_down(struct device *dev)
1514 {
1515 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1516 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1517 return ret;
1518 }
1519
1520 struct if_check_data {
1521 struct device *dev;
1522 int pending;
1523 int ret;
1524 };
1525
1526 #ifndef IFF_LOWER_UP
1527 #define IFF_LOWER_UP 0x10000
1528 #endif
1529
1530 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1531 {
1532 struct nlmsghdr *nh = nlmsg_hdr(msg);
1533 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1534 struct if_check_data *chk = (struct if_check_data *)arg;
1535
1536 if (nh->nlmsg_type != RTM_NEWLINK)
1537 return NL_SKIP;
1538
1539 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1540 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1541
1542 return NL_OK;
1543 }
1544
1545 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1546 {
1547 struct if_check_data *chk = (struct if_check_data *)arg;
1548 chk->pending = 0;
1549 return NL_STOP;
1550 }
1551
1552 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1553 {
1554 struct if_check_data *chk = (struct if_check_data *)arg;
1555
1556 device_set_present(chk->dev, false);
1557 device_set_link(chk->dev, false);
1558 chk->pending = err->error;
1559
1560 return NL_STOP;
1561 }
1562
1563 int system_if_check(struct device *dev)
1564 {
1565 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1566 struct nl_msg *msg;
1567 struct ifinfomsg ifi = {
1568 .ifi_family = AF_UNSPEC,
1569 .ifi_index = 0,
1570 };
1571 struct if_check_data chk = {
1572 .dev = dev,
1573 .pending = 1,
1574 };
1575 int ret = 1;
1576
1577 if (!cb)
1578 return ret;
1579
1580 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1581 if (!msg)
1582 goto out;
1583
1584 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1585 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1586 goto free;
1587
1588 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1589 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1590 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1591
1592 nl_send_auto_complete(sock_rtnl, msg);
1593 while (chk.pending > 0)
1594 nl_recvmsgs(sock_rtnl, cb);
1595
1596 ret = chk.pending;
1597
1598 free:
1599 nlmsg_free(msg);
1600 out:
1601 nl_cb_put(cb);
1602 return ret;
1603 }
1604
1605 struct device *
1606 system_if_get_parent(struct device *dev)
1607 {
1608 char buf[64], *devname;
1609 int ifindex, iflink, len;
1610 FILE *f;
1611
1612 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1613 f = fopen(buf, "r");
1614 if (!f)
1615 return NULL;
1616
1617 len = fread(buf, 1, sizeof(buf) - 1, f);
1618 fclose(f);
1619
1620 if (len <= 0)
1621 return NULL;
1622
1623 buf[len] = 0;
1624 iflink = strtoul(buf, NULL, 0);
1625 ifindex = system_if_resolve(dev);
1626 if (!iflink || iflink == ifindex)
1627 return NULL;
1628
1629 devname = if_indextoname(iflink, buf);
1630 if (!devname)
1631 return NULL;
1632
1633 return device_get(devname, true);
1634 }
1635
1636 static bool
1637 read_string_file(int dir_fd, const char *file, char *buf, int len)
1638 {
1639 bool ret = false;
1640 char *c;
1641 int fd;
1642
1643 fd = openat(dir_fd, file, O_RDONLY);
1644 if (fd < 0)
1645 return false;
1646
1647 retry:
1648 len = read(fd, buf, len - 1);
1649 if (len < 0) {
1650 if (errno == EINTR)
1651 goto retry;
1652 } else if (len > 0) {
1653 buf[len] = 0;
1654
1655 c = strchr(buf, '\n');
1656 if (c)
1657 *c = 0;
1658
1659 ret = true;
1660 }
1661
1662 close(fd);
1663
1664 return ret;
1665 }
1666
1667 static bool
1668 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1669 {
1670 char buf[64];
1671 bool ret = false;
1672
1673 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1674 if (ret)
1675 *val = strtoull(buf, NULL, 0);
1676
1677 return ret;
1678 }
1679
1680 /* Assume advertised flags == supported flags */
1681 static const struct {
1682 uint32_t mask;
1683 const char *name;
1684 } ethtool_link_modes[] = {
1685 { ADVERTISED_10baseT_Half, "10H" },
1686 { ADVERTISED_10baseT_Full, "10F" },
1687 { ADVERTISED_100baseT_Half, "100H" },
1688 { ADVERTISED_100baseT_Full, "100F" },
1689 { ADVERTISED_1000baseT_Half, "1000H" },
1690 { ADVERTISED_1000baseT_Full, "1000F" },
1691 };
1692
1693 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1694 {
1695 int i;
1696 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1697 if (mask & ethtool_link_modes[i].mask)
1698 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1699 }
1700 }
1701
1702 bool
1703 system_if_force_external(const char *ifname)
1704 {
1705 char buf[64];
1706 struct stat s;
1707
1708 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1709 return stat(buf, &s) == 0;
1710 }
1711
1712 int
1713 system_if_dump_info(struct device *dev, struct blob_buf *b)
1714 {
1715 struct ethtool_cmd ecmd;
1716 struct ifreq ifr;
1717 char *s;
1718 void *c;
1719
1720 memset(&ecmd, 0, sizeof(ecmd));
1721 memset(&ifr, 0, sizeof(ifr));
1722 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1723 ifr.ifr_data = (caddr_t) &ecmd;
1724 ecmd.cmd = ETHTOOL_GSET;
1725
1726 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1727 c = blobmsg_open_array(b, "link-advertising");
1728 system_add_link_modes(b, ecmd.advertising);
1729 blobmsg_close_array(b, c);
1730
1731 c = blobmsg_open_array(b, "link-supported");
1732 system_add_link_modes(b, ecmd.supported);
1733 blobmsg_close_array(b, c);
1734
1735 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1736 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1737 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1738 blobmsg_add_string_buffer(b);
1739 }
1740
1741 return 0;
1742 }
1743
1744 int
1745 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1746 {
1747 const char *const counters[] = {
1748 "collisions", "rx_frame_errors", "tx_compressed",
1749 "multicast", "rx_length_errors", "tx_dropped",
1750 "rx_bytes", "rx_missed_errors", "tx_errors",
1751 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1752 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1753 "rx_dropped", "tx_aborted_errors", "tx_packets",
1754 "rx_errors", "tx_bytes", "tx_window_errors",
1755 "rx_fifo_errors", "tx_carrier_errors",
1756 };
1757 char buf[64];
1758 int stats_dir;
1759 int i;
1760 uint64_t val = 0;
1761
1762 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1763 stats_dir = open(buf, O_DIRECTORY);
1764 if (stats_dir < 0)
1765 return -1;
1766
1767 for (i = 0; i < ARRAY_SIZE(counters); i++)
1768 if (read_uint64_file(stats_dir, counters[i], &val))
1769 blobmsg_add_u64(b, counters[i], val);
1770
1771 close(stats_dir);
1772 return 0;
1773 }
1774
1775 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1776 {
1777 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1778 int alen = v4 ? 4 : 16;
1779 unsigned int flags = 0;
1780 struct ifaddrmsg ifa = {
1781 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1782 .ifa_prefixlen = addr->mask,
1783 .ifa_index = dev->ifindex,
1784 };
1785
1786 struct nl_msg *msg;
1787 if (cmd == RTM_NEWADDR)
1788 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1789
1790 msg = nlmsg_alloc_simple(cmd, flags);
1791 if (!msg)
1792 return -1;
1793
1794 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1795 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1796 if (v4) {
1797 if (addr->broadcast)
1798 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1799 if (addr->point_to_point)
1800 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1801 } else {
1802 time_t now = system_get_rtime();
1803 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1804
1805 if (addr->preferred_until) {
1806 int64_t preferred = addr->preferred_until - now;
1807 if (preferred < 0)
1808 preferred = 0;
1809 else if (preferred > UINT32_MAX)
1810 preferred = UINT32_MAX;
1811
1812 cinfo.ifa_prefered = preferred;
1813 }
1814
1815 if (addr->valid_until) {
1816 int64_t valid = addr->valid_until - now;
1817 if (valid <= 0) {
1818 nlmsg_free(msg);
1819 return -1;
1820 }
1821 else if (valid > UINT32_MAX)
1822 valid = UINT32_MAX;
1823
1824 cinfo.ifa_valid = valid;
1825 }
1826
1827 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1828
1829 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1830 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1831 }
1832
1833 return system_rtnl_call(msg);
1834 }
1835
1836 int system_add_address(struct device *dev, struct device_addr *addr)
1837 {
1838 return system_addr(dev, addr, RTM_NEWADDR);
1839 }
1840
1841 int system_del_address(struct device *dev, struct device_addr *addr)
1842 {
1843 return system_addr(dev, addr, RTM_DELADDR);
1844 }
1845
1846 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1847 {
1848 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1849 bool have_gw;
1850 unsigned int flags = 0;
1851
1852 if (alen == 4)
1853 have_gw = !!route->nexthop.in.s_addr;
1854 else
1855 have_gw = route->nexthop.in6.s6_addr32[0] ||
1856 route->nexthop.in6.s6_addr32[1] ||
1857 route->nexthop.in6.s6_addr32[2] ||
1858 route->nexthop.in6.s6_addr32[3];
1859
1860 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1861 ? route->table : RT_TABLE_MAIN;
1862
1863 struct rtmsg rtm = {
1864 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1865 .rtm_dst_len = route->mask,
1866 .rtm_src_len = route->sourcemask,
1867 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1868 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1869 .rtm_scope = RT_SCOPE_NOWHERE,
1870 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1871 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1872 };
1873 struct nl_msg *msg;
1874
1875 if (cmd == RTM_NEWROUTE) {
1876 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1877
1878 if (!dev) { // Add null-route
1879 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1880 rtm.rtm_type = RTN_UNREACHABLE;
1881 }
1882 else
1883 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1884 }
1885
1886 if (route->flags & DEVROUTE_TYPE) {
1887 rtm.rtm_type = route->type;
1888 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1889 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1890 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1891 rtm.rtm_table = RT_TABLE_LOCAL;
1892 }
1893
1894 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1895 rtm.rtm_scope = RT_SCOPE_HOST;
1896 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1897 rtm.rtm_type == RTN_ANYCAST) {
1898 rtm.rtm_scope = RT_SCOPE_LINK;
1899 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1900 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1901 rtm.rtm_type == RTN_THROW) {
1902 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1903 dev = NULL;
1904 }
1905 }
1906
1907 msg = nlmsg_alloc_simple(cmd, flags);
1908 if (!msg)
1909 return -1;
1910
1911 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1912
1913 if (route->mask)
1914 nla_put(msg, RTA_DST, alen, &route->addr);
1915
1916 if (route->sourcemask) {
1917 if (rtm.rtm_family == AF_INET)
1918 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1919 else
1920 nla_put(msg, RTA_SRC, alen, &route->source);
1921 }
1922
1923 if (route->metric > 0)
1924 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1925
1926 if (have_gw)
1927 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1928
1929 if (dev)
1930 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1931
1932 if (table >= 256)
1933 nla_put_u32(msg, RTA_TABLE, table);
1934
1935 if (route->flags & DEVROUTE_MTU) {
1936 struct nlattr *metrics;
1937
1938 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1939 goto nla_put_failure;
1940
1941 nla_put_u32(msg, RTAX_MTU, route->mtu);
1942
1943 nla_nest_end(msg, metrics);
1944 }
1945
1946 return system_rtnl_call(msg);
1947
1948 nla_put_failure:
1949 nlmsg_free(msg);
1950 return -ENOMEM;
1951 }
1952
1953 int system_add_route(struct device *dev, struct device_route *route)
1954 {
1955 return system_rt(dev, route, RTM_NEWROUTE);
1956 }
1957
1958 int system_del_route(struct device *dev, struct device_route *route)
1959 {
1960 return system_rt(dev, route, RTM_DELROUTE);
1961 }
1962
1963 int system_flush_routes(void)
1964 {
1965 const char *names[] = {
1966 "/proc/sys/net/ipv4/route/flush",
1967 "/proc/sys/net/ipv6/route/flush"
1968 };
1969 int fd, i;
1970
1971 for (i = 0; i < ARRAY_SIZE(names); i++) {
1972 fd = open(names[i], O_WRONLY);
1973 if (fd < 0)
1974 continue;
1975
1976 if (write(fd, "-1", 2)) {}
1977 close(fd);
1978 }
1979 return 0;
1980 }
1981
1982 bool system_resolve_rt_type(const char *type, unsigned int *id)
1983 {
1984 return system_rtn_aton(type, id);
1985 }
1986
1987 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1988 {
1989 FILE *f;
1990 char *e, buf[128];
1991 unsigned int n, proto = 256;
1992 n = strtoul(type, &e, 0);
1993 if (!*e && e != type)
1994 proto = n;
1995 else if (!strcmp(type, "unspec"))
1996 proto = RTPROT_UNSPEC;
1997 else if (!strcmp(type, "kernel"))
1998 proto = RTPROT_KERNEL;
1999 else if (!strcmp(type, "boot"))
2000 proto = RTPROT_BOOT;
2001 else if (!strcmp(type, "static"))
2002 proto = RTPROT_STATIC;
2003 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2004 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2005 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2006 continue;
2007
2008 n = strtoul(e, NULL, 10);
2009 e = strtok(NULL, " \t\n");
2010
2011 if (e && !strcmp(e, type)) {
2012 proto = n;
2013 break;
2014 }
2015 }
2016 fclose(f);
2017 }
2018
2019 if (proto > 255)
2020 return false;
2021
2022 *id = proto;
2023 return true;
2024 }
2025
2026 bool system_resolve_rt_table(const char *name, unsigned int *id)
2027 {
2028 FILE *f;
2029 char *e, buf[128];
2030 unsigned int n, table = RT_TABLE_UNSPEC;
2031
2032 /* first try to parse table as number */
2033 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2034 table = n;
2035
2036 /* handle well known aliases */
2037 else if (!strcmp(name, "default"))
2038 table = RT_TABLE_DEFAULT;
2039 else if (!strcmp(name, "main"))
2040 table = RT_TABLE_MAIN;
2041 else if (!strcmp(name, "local"))
2042 table = RT_TABLE_LOCAL;
2043
2044 /* try to look up name in /etc/iproute2/rt_tables */
2045 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2046 {
2047 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2048 {
2049 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2050 continue;
2051
2052 n = strtoul(e, NULL, 10);
2053 e = strtok(NULL, " \t\n");
2054
2055 if (e && !strcmp(e, name))
2056 {
2057 table = n;
2058 break;
2059 }
2060 }
2061
2062 fclose(f);
2063 }
2064
2065 if (table == RT_TABLE_UNSPEC)
2066 return false;
2067
2068 *id = table;
2069 return true;
2070 }
2071
2072 bool system_is_default_rt_table(unsigned int id)
2073 {
2074 return (id == RT_TABLE_MAIN);
2075 }
2076
2077 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2078 {
2079 char *e;
2080 unsigned int n;
2081
2082 if (!strcmp(filter, "strict"))
2083 n = 1;
2084 else if (!strcmp(filter, "loose"))
2085 n = 2;
2086 else {
2087 n = strtoul(filter, &e, 0);
2088 if (*e || e == filter || n > 2)
2089 return false;
2090 }
2091
2092 *id = n;
2093 return true;
2094 }
2095
2096 static int system_iprule(struct iprule *rule, int cmd)
2097 {
2098 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2099
2100 struct nl_msg *msg;
2101 struct rtmsg rtm = {
2102 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2103 .rtm_protocol = RTPROT_STATIC,
2104 .rtm_scope = RT_SCOPE_UNIVERSE,
2105 .rtm_table = RT_TABLE_UNSPEC,
2106 .rtm_type = RTN_UNSPEC,
2107 .rtm_flags = 0,
2108 };
2109
2110 if (cmd == RTM_NEWRULE)
2111 rtm.rtm_type = RTN_UNICAST;
2112
2113 if (rule->invert)
2114 rtm.rtm_flags |= FIB_RULE_INVERT;
2115
2116 if (rule->flags & IPRULE_SRC)
2117 rtm.rtm_src_len = rule->src_mask;
2118
2119 if (rule->flags & IPRULE_DEST)
2120 rtm.rtm_dst_len = rule->dest_mask;
2121
2122 if (rule->flags & IPRULE_TOS)
2123 rtm.rtm_tos = rule->tos;
2124
2125 if (rule->flags & IPRULE_LOOKUP) {
2126 if (rule->lookup < 256)
2127 rtm.rtm_table = rule->lookup;
2128 }
2129
2130 if (rule->flags & IPRULE_ACTION)
2131 rtm.rtm_type = rule->action;
2132 else if (rule->flags & IPRULE_GOTO)
2133 rtm.rtm_type = FR_ACT_GOTO;
2134 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2135 rtm.rtm_type = FR_ACT_NOP;
2136
2137 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2138
2139 if (!msg)
2140 return -1;
2141
2142 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2143
2144 if (rule->flags & IPRULE_IN)
2145 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2146
2147 if (rule->flags & IPRULE_OUT)
2148 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2149
2150 if (rule->flags & IPRULE_SRC)
2151 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2152
2153 if (rule->flags & IPRULE_DEST)
2154 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2155
2156 if (rule->flags & IPRULE_PRIORITY)
2157 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2158 else if (cmd == RTM_NEWRULE)
2159 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2160
2161 if (rule->flags & IPRULE_FWMARK)
2162 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2163
2164 if (rule->flags & IPRULE_FWMASK)
2165 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2166
2167 if (rule->flags & IPRULE_LOOKUP) {
2168 if (rule->lookup >= 256)
2169 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2170 }
2171
2172 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2173 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2174
2175 if (rule->flags & IPRULE_GOTO)
2176 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2177
2178 return system_rtnl_call(msg);
2179 }
2180
2181 int system_add_iprule(struct iprule *rule)
2182 {
2183 return system_iprule(rule, RTM_NEWRULE);
2184 }
2185
2186 int system_del_iprule(struct iprule *rule)
2187 {
2188 return system_iprule(rule, RTM_DELRULE);
2189 }
2190
2191 int system_flush_iprules(void)
2192 {
2193 int rv = 0;
2194 struct iprule rule;
2195
2196 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2197 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2198
2199 memset(&rule, 0, sizeof(rule));
2200
2201
2202 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2203
2204 rule.priority = 0;
2205 rule.lookup = RT_TABLE_LOCAL;
2206 rv |= system_iprule(&rule, RTM_NEWRULE);
2207
2208 rule.priority = 32766;
2209 rule.lookup = RT_TABLE_MAIN;
2210 rv |= system_iprule(&rule, RTM_NEWRULE);
2211
2212 rule.priority = 32767;
2213 rule.lookup = RT_TABLE_DEFAULT;
2214 rv |= system_iprule(&rule, RTM_NEWRULE);
2215
2216
2217 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2218
2219 rule.priority = 0;
2220 rule.lookup = RT_TABLE_LOCAL;
2221 rv |= system_iprule(&rule, RTM_NEWRULE);
2222
2223 rule.priority = 32766;
2224 rule.lookup = RT_TABLE_MAIN;
2225 rv |= system_iprule(&rule, RTM_NEWRULE);
2226
2227 return rv;
2228 }
2229
2230 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2231 {
2232 return system_rtn_aton(action, id);
2233 }
2234
2235 time_t system_get_rtime(void)
2236 {
2237 struct timespec ts;
2238 struct timeval tv;
2239
2240 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2241 return ts.tv_sec;
2242
2243 if (gettimeofday(&tv, NULL) == 0)
2244 return tv.tv_sec;
2245
2246 return 0;
2247 }
2248
2249 #ifndef IP_DF
2250 #define IP_DF 0x4000
2251 #endif
2252
2253 static int tunnel_ioctl(const char *name, int cmd, void *p)
2254 {
2255 struct ifreq ifr;
2256
2257 memset(&ifr, 0, sizeof(ifr));
2258 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2259 ifr.ifr_ifru.ifru_data = p;
2260 return ioctl(sock_ioctl, cmd, &ifr);
2261 }
2262
2263 #ifdef IFLA_IPTUN_MAX
2264 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2265 struct blob_attr **tb)
2266 {
2267 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2268 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2269 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2270 struct blob_attr *cur;
2271 int ret = 0, ttl = 0;
2272
2273 if (!nlm)
2274 return -1;
2275
2276 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2277 nla_put_string(nlm, IFLA_IFNAME, name);
2278
2279 if (link)
2280 nla_put_u32(nlm, IFLA_LINK, link);
2281
2282 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2283 if (!linkinfo) {
2284 ret = -ENOMEM;
2285 goto failure;
2286 }
2287
2288 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2289 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2290 if (!infodata) {
2291 ret = -ENOMEM;
2292 goto failure;
2293 }
2294
2295 if (link)
2296 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2297
2298 if ((cur = tb[TUNNEL_ATTR_TTL]))
2299 ttl = blobmsg_get_u32(cur);
2300
2301 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2302 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
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 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2322 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2323
2324 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2325 blobmsg_data(cur), blobmsg_len(cur));
2326
2327 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2328 char *str = blobmsg_get_string(cur);
2329
2330 if (strcmp(str, "ignore")) {
2331 char *e;
2332 unsigned encap_limit = strtoul(str, &e, 0);
2333
2334 if (e == str || *e || encap_limit > 255) {
2335 ret = -EINVAL;
2336 goto failure;
2337 }
2338
2339 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2340 } else
2341 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, IP6_TNL_F_IGN_ENCAP_LIMIT);
2342 }
2343
2344 #ifdef IFLA_IPTUN_FMR_MAX
2345 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2346 struct blob_attr *rcur;
2347 unsigned rrem, fmrcnt = 0;
2348 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2349
2350 if (!fmrs) {
2351 ret = -ENOMEM;
2352 goto failure;
2353 }
2354
2355 blobmsg_for_each_attr(rcur, cur, rrem) {
2356 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2357 struct in6_addr ip6prefix;
2358 struct in_addr ip4prefix;
2359 unsigned ip4len, ip6len, ealen, offset;
2360
2361 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2362 blobmsg_data(rcur), blobmsg_len(rcur));
2363
2364 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2365 !parse_ip_and_netmask(AF_INET6,
2366 blobmsg_data(tb_cur), &ip6prefix,
2367 &ip6len)) {
2368 ret = -EINVAL;
2369 goto failure;
2370 }
2371
2372 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2373 !parse_ip_and_netmask(AF_INET,
2374 blobmsg_data(tb_cur), &ip4prefix,
2375 &ip4len)) {
2376 ret = -EINVAL;
2377 goto failure;
2378 }
2379
2380 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2381 ret = -EINVAL;
2382 goto failure;
2383 }
2384 ealen = blobmsg_get_u32(tb_cur);
2385
2386 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2387 ret = -EINVAL;
2388 goto failure;
2389 }
2390 offset = blobmsg_get_u32(tb_cur);
2391
2392 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2393 if (!rule) {
2394 ret = -ENOMEM;
2395 goto failure;
2396 }
2397
2398 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2399 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2400 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2401 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2402 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2403 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2404
2405 nla_nest_end(nlm, rule);
2406 }
2407
2408 nla_nest_end(nlm, fmrs);
2409 }
2410 #endif
2411 }
2412
2413 nla_nest_end(nlm, infodata);
2414 nla_nest_end(nlm, linkinfo);
2415
2416 return system_rtnl_call(nlm);
2417
2418 failure:
2419 nlmsg_free(nlm);
2420 return ret;
2421 }
2422 #endif
2423
2424 #ifdef IFLA_IPTUN_MAX
2425 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2426 static int system_add_gre_tunnel(const char *name, const char *kind,
2427 const unsigned int link, struct blob_attr **tb, bool v6)
2428 {
2429 struct nl_msg *nlm;
2430 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2431 struct blob_attr *cur;
2432 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2433 uint16_t iflags = 0, oflags = 0;
2434 uint8_t tos = 0;
2435 int ret = 0, ttl = 0;
2436
2437 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2438 if (!nlm)
2439 return -1;
2440
2441 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2442 nla_put_string(nlm, IFLA_IFNAME, name);
2443
2444 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2445 if (!linkinfo) {
2446 ret = -ENOMEM;
2447 goto failure;
2448 }
2449
2450 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2451 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2452 if (!infodata) {
2453 ret = -ENOMEM;
2454 goto failure;
2455 }
2456
2457 if (link)
2458 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2459
2460 if ((cur = tb[TUNNEL_ATTR_TTL]))
2461 ttl = blobmsg_get_u32(cur);
2462
2463 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2464 char *str = blobmsg_get_string(cur);
2465 if (strcmp(str, "inherit")) {
2466 unsigned uval;
2467
2468 if (!system_tos_aton(str, &uval)) {
2469 ret = -EINVAL;
2470 goto failure;
2471 }
2472
2473 if (v6)
2474 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2475 else
2476 tos = uval;
2477 } else {
2478 if (v6)
2479 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2480 else
2481 tos = 1;
2482 }
2483 }
2484
2485 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2486 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2487
2488 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2489 blobmsg_data(cur), blobmsg_len(cur));
2490
2491 if ((cur = tb_data[GRE_DATA_IKEY])) {
2492 if ((ikey = blobmsg_get_u32(cur)))
2493 iflags |= GRE_KEY;
2494 }
2495
2496 if ((cur = tb_data[GRE_DATA_OKEY])) {
2497 if ((okey = blobmsg_get_u32(cur)))
2498 oflags |= GRE_KEY;
2499 }
2500
2501 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2502 if (blobmsg_get_bool(cur))
2503 iflags |= GRE_CSUM;
2504 }
2505
2506 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2507 if (blobmsg_get_bool(cur))
2508 oflags |= GRE_CSUM;
2509 }
2510
2511 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2512 if (blobmsg_get_bool(cur))
2513 iflags |= GRE_SEQ;
2514 }
2515
2516 if ((cur = tb[GRE_DATA_OSEQNO])) {
2517 if (blobmsg_get_bool(cur))
2518 oflags |= GRE_SEQ;
2519 }
2520 }
2521
2522 if (v6) {
2523 struct in6_addr in6buf;
2524 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2525 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2526 ret = -EINVAL;
2527 goto failure;
2528 }
2529 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2530 }
2531
2532 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2533 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2534 ret = -EINVAL;
2535 goto failure;
2536 }
2537 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2538 }
2539 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2540
2541 if (flowinfo)
2542 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2543
2544 if (flags)
2545 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2546
2547 if (!ttl)
2548 ttl = 64;
2549 } else {
2550 struct in_addr inbuf;
2551 bool set_df = true;
2552
2553 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2554 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2555 ret = -EINVAL;
2556 goto failure;
2557 }
2558 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2559 }
2560
2561 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2562 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2563 ret = -EINVAL;
2564 goto failure;
2565 }
2566 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2567
2568 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2569 if (!okey) {
2570 okey = inbuf.s_addr;
2571 oflags |= GRE_KEY;
2572 }
2573
2574 if (!ikey) {
2575 ikey = inbuf.s_addr;
2576 iflags |= GRE_KEY;
2577 }
2578 }
2579 }
2580
2581 if ((cur = tb[TUNNEL_ATTR_DF]))
2582 set_df = blobmsg_get_bool(cur);
2583
2584 if (!set_df) {
2585 /* ttl != 0 and nopmtudisc are incompatible */
2586 if (ttl) {
2587 ret = -EINVAL;
2588 goto failure;
2589 }
2590 } else if (!ttl)
2591 ttl = 64;
2592
2593 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2594
2595 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2596 }
2597
2598 if (ttl)
2599 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2600
2601 if (oflags)
2602 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2603
2604 if (iflags)
2605 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2606
2607 if (okey)
2608 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2609
2610 if (ikey)
2611 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2612
2613 nla_nest_end(nlm, infodata);
2614 nla_nest_end(nlm, linkinfo);
2615
2616 return system_rtnl_call(nlm);
2617
2618 failure:
2619 nlmsg_free(nlm);
2620 return ret;
2621 }
2622 #endif
2623
2624 #ifdef IFLA_VTI_MAX
2625 static int system_add_vti_tunnel(const char *name, const char *kind,
2626 const unsigned int link, struct blob_attr **tb, bool v6)
2627 {
2628 struct nl_msg *nlm;
2629 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2630 struct blob_attr *cur;
2631 int ret = 0;
2632
2633 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2634 if (!nlm)
2635 return -1;
2636
2637 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2638 nla_put_string(nlm, IFLA_IFNAME, name);
2639
2640 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2641 if (!linkinfo) {
2642 ret = -ENOMEM;
2643 goto failure;
2644 }
2645
2646 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2647 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2648 if (!infodata) {
2649 ret = -ENOMEM;
2650 goto failure;
2651 }
2652
2653 if (link)
2654 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2655
2656 if (v6) {
2657 struct in6_addr in6buf;
2658 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2659 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2660 ret = -EINVAL;
2661 goto failure;
2662 }
2663 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2664 }
2665
2666 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2667 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2668 ret = -EINVAL;
2669 goto failure;
2670 }
2671 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2672 }
2673
2674 } else {
2675 struct in_addr inbuf;
2676
2677 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2678 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2679 ret = -EINVAL;
2680 goto failure;
2681 }
2682 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2683 }
2684
2685 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2686 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2687 ret = -EINVAL;
2688 goto failure;
2689 }
2690 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2691 }
2692
2693 }
2694
2695 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2696 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2697 uint32_t ikey = 0, okey = 0;
2698
2699 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2700 blobmsg_data(cur), blobmsg_len(cur));
2701
2702 if ((cur = tb_data[VTI_DATA_IKEY])) {
2703 if ((ikey = blobmsg_get_u32(cur)))
2704 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2705 }
2706
2707 if ((cur = tb_data[VTI_DATA_OKEY])) {
2708 if ((okey = blobmsg_get_u32(cur)))
2709 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2710 }
2711 }
2712
2713 nla_nest_end(nlm, infodata);
2714 nla_nest_end(nlm, linkinfo);
2715
2716 return system_rtnl_call(nlm);
2717
2718 failure:
2719 nlmsg_free(nlm);
2720 return ret;
2721 }
2722 #endif
2723
2724 #ifdef IFLA_VXLAN_MAX
2725 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2726 {
2727 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2728 struct nl_msg *msg;
2729 struct nlattr *linkinfo, *data;
2730 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2731 struct blob_attr *cur;
2732 int ret = 0;
2733
2734 if ((cur = tb[TUNNEL_ATTR_DATA]))
2735 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2736 blobmsg_data(cur), blobmsg_len(cur));
2737 else
2738 return -EINVAL;
2739
2740 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2741
2742 if (!msg)
2743 return -1;
2744
2745 nlmsg_append(msg, &iim, sizeof(iim), 0);
2746
2747 nla_put_string(msg, IFLA_IFNAME, name);
2748
2749 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2750 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2751 if (!ea) {
2752 ret = -EINVAL;
2753 goto failure;
2754 }
2755
2756 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2757 }
2758
2759 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2760 uint32_t mtu = blobmsg_get_u32(cur);
2761 nla_put_u32(msg, IFLA_MTU, mtu);
2762 }
2763
2764 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2765 ret = -ENOMEM;
2766 goto failure;
2767 }
2768
2769 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2770
2771 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2772 ret = -ENOMEM;
2773 goto failure;
2774 }
2775
2776 if (link)
2777 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2778
2779 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2780 uint32_t id = blobmsg_get_u32(cur);
2781 if (id >= (1u << 24) - 1) {
2782 ret = -EINVAL;
2783 goto failure;
2784 }
2785
2786 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2787 }
2788
2789 if (v6) {
2790 struct in6_addr in6buf;
2791 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2792 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2793 ret = -EINVAL;
2794 goto failure;
2795 }
2796 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2797 }
2798
2799 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2800 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2801 ret = -EINVAL;
2802 goto failure;
2803 }
2804 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2805 }
2806 } else {
2807 struct in_addr inbuf;
2808
2809 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2810 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2811 ret = -EINVAL;
2812 goto failure;
2813 }
2814 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2815 }
2816
2817 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2818 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2819 ret = -EINVAL;
2820 goto failure;
2821 }
2822 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2823 }
2824 }
2825
2826 uint32_t port = 4789;
2827 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2828 port = blobmsg_get_u32(cur);
2829 if (port < 1 || port > 65535) {
2830 ret = -EINVAL;
2831 goto failure;
2832 }
2833 }
2834 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2835
2836 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2837 bool rxcsum = blobmsg_get_bool(cur);
2838 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2839 }
2840
2841 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
2842 bool txcsum = blobmsg_get_bool(cur);
2843 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
2844 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
2845 }
2846
2847 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2848 char *str = blobmsg_get_string(cur);
2849 unsigned tos = 1;
2850
2851 if (strcmp(str, "inherit")) {
2852 if (!system_tos_aton(str, &tos)) {
2853 ret = -EINVAL;
2854 goto failure;
2855 }
2856 }
2857
2858 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2859 }
2860
2861 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2862 uint32_t ttl = blobmsg_get_u32(cur);
2863 if (ttl < 1 || ttl > 255) {
2864 ret = -EINVAL;
2865 goto failure;
2866 }
2867
2868 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2869 }
2870
2871 nla_nest_end(msg, data);
2872 nla_nest_end(msg, linkinfo);
2873
2874 ret = system_rtnl_call(msg);
2875 if (ret)
2876 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2877
2878 return ret;
2879
2880 failure:
2881 nlmsg_free(msg);
2882 return ret;
2883 }
2884 #endif
2885
2886 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2887 {
2888 struct blob_attr *cur;
2889 int ret = 0;
2890
2891 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2892 return -1;
2893
2894 #ifdef SIOCADD6RD
2895 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2896 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2897 unsigned int mask;
2898 struct ip_tunnel_6rd p6;
2899
2900 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2901 blobmsg_data(cur), blobmsg_len(cur));
2902
2903 memset(&p6, 0, sizeof(p6));
2904
2905 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2906 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2907 &p6.prefix, &mask) || mask > 128) {
2908 ret = -EINVAL;
2909 goto failure;
2910 }
2911
2912 p6.prefixlen = mask;
2913 }
2914
2915 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2916 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2917 &p6.relay_prefix, &mask) || mask > 32) {
2918 ret = -EINVAL;
2919 goto failure;
2920 }
2921
2922 p6.relay_prefixlen = mask;
2923 }
2924
2925 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2926 ret = -1;
2927 goto failure;
2928 }
2929 }
2930 #endif
2931
2932 return ret;
2933
2934 failure:
2935 __system_del_ip_tunnel(name, tb);
2936 return ret;
2937 }
2938
2939 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2940 {
2941 struct blob_attr *cur;
2942 bool set_df = true;
2943 struct ip_tunnel_parm p = {
2944 .link = link,
2945 .iph = {
2946 .version = 4,
2947 .ihl = 5,
2948 .protocol = proto,
2949 }
2950 };
2951
2952 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2953 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2954 return -EINVAL;
2955
2956 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2957 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2958 return -EINVAL;
2959
2960 if ((cur = tb[TUNNEL_ATTR_DF]))
2961 set_df = blobmsg_get_bool(cur);
2962
2963 if ((cur = tb[TUNNEL_ATTR_TTL]))
2964 p.iph.ttl = blobmsg_get_u32(cur);
2965
2966 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2967 char *str = blobmsg_get_string(cur);
2968 if (strcmp(str, "inherit")) {
2969 unsigned uval;
2970
2971 if (!system_tos_aton(str, &uval))
2972 return -EINVAL;
2973
2974 p.iph.tos = uval;
2975 } else
2976 p.iph.tos = 1;
2977 }
2978
2979 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2980 /* ttl !=0 and nopmtudisc are incompatible */
2981 if (p.iph.ttl && p.iph.frag_off == 0)
2982 return -EINVAL;
2983
2984 strncpy(p.name, name, sizeof(p.name) - 1);
2985
2986 switch (p.iph.protocol) {
2987 case IPPROTO_IPIP:
2988 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2989 case IPPROTO_IPV6:
2990 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2991 default:
2992 break;
2993 }
2994 return -1;
2995 }
2996
2997 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2998 {
2999 struct blob_attr *cur;
3000 const char *str;
3001
3002 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3003 return -EINVAL;
3004 str = blobmsg_data(cur);
3005
3006 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3007 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3008 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3009 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
3010 return system_link_del(name);
3011 else
3012 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3013 }
3014
3015 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3016 {
3017 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3018
3019 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3020 blob_data(attr), blob_len(attr));
3021
3022 return __system_del_ip_tunnel(name, tb);
3023 }
3024
3025 int system_update_ipv6_mtu(struct device *dev, int mtu)
3026 {
3027 int ret = -1;
3028 char buf[64];
3029 int fd;
3030
3031 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3032 dev->ifname);
3033
3034 fd = open(buf, O_RDWR);
3035 if (fd < 0)
3036 return ret;
3037
3038 if (!mtu) {
3039 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3040 if (len < 0)
3041 goto out;
3042
3043 buf[len] = 0;
3044 ret = atoi(buf);
3045 } else {
3046 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3047 ret = mtu;
3048 }
3049
3050 out:
3051 close(fd);
3052 return ret;
3053 }
3054
3055 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3056 {
3057 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3058 struct blob_attr *cur;
3059 const char *str;
3060
3061 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3062 blob_data(attr), blob_len(attr));
3063
3064 __system_del_ip_tunnel(name, tb);
3065
3066 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3067 return -EINVAL;
3068 str = blobmsg_data(cur);
3069
3070 unsigned int ttl = 0;
3071 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3072 ttl = blobmsg_get_u32(cur);
3073 if (ttl > 255)
3074 return -EINVAL;
3075 }
3076
3077 unsigned int link = 0;
3078 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3079 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3080 if (!iface)
3081 return -EINVAL;
3082
3083 if (iface->l3_dev.dev)
3084 link = iface->l3_dev.dev->ifindex;
3085 }
3086
3087 if (!strcmp(str, "sit"))
3088 return system_add_sit_tunnel(name, link, tb);
3089 #ifdef IFLA_IPTUN_MAX
3090 else if (!strcmp(str, "ipip6")) {
3091 return system_add_ip6_tunnel(name, link, tb);
3092 } else if (!strcmp(str, "greip")) {
3093 return system_add_gre_tunnel(name, "gre", link, tb, false);
3094 } else if (!strcmp(str, "gretapip")) {
3095 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3096 } else if (!strcmp(str, "greip6")) {
3097 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3098 } else if (!strcmp(str, "gretapip6")) {
3099 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3100 #ifdef IFLA_VTI_MAX
3101 } else if (!strcmp(str, "vtiip")) {
3102 return system_add_vti_tunnel(name, "vti", link, tb, false);
3103 } else if (!strcmp(str, "vtiip6")) {
3104 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3105 #endif
3106 #ifdef IFLA_VXLAN_MAX
3107 } else if(!strcmp(str, "vxlan")) {
3108 return system_add_vxlan(name, link, tb, false);
3109 } else if(!strcmp(str, "vxlan6")) {
3110 return system_add_vxlan(name, link, tb, true);
3111 #endif
3112 #endif
3113 } else if (!strcmp(str, "ipip")) {
3114 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3115 }
3116 else
3117 return -EINVAL;
3118
3119 return 0;
3120 }
OpenWrt Network interface configuration daemon