projects / project / netifd.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
system-linux: fix GRE ikey/okey endianness
[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_multicast_router(struct device *dev, const char *val, bool bridge)
350 {
351 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
352 "/sys/class/net/%s/brport/multicast_router",
353 dev->ifname, val);
354 }
355
356 static void system_bridge_set_robustness(struct device *dev, const char *val)
357 {
358 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
359 dev->ifname, val);
360 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
361 dev->ifname, val);
362 }
363
364 static void system_bridge_set_query_interval(struct device *dev, const char *val)
365 {
366 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
367 dev->ifname, val);
368 }
369
370 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
371 {
372 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
373 dev->ifname, val);
374 }
375
376 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
377 {
378 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
379 dev->ifname, val);
380 }
381
382 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
383 {
384 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
385 dev->ifname, val);
386 }
387
388 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
389 {
390 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
391 dev->ifname, val);
392 }
393
394 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
395 {
396 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
397 dev->ifname, val);
398 }
399
400 static void system_bridge_set_learning(struct device *dev, const char *val)
401 {
402 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
403 }
404
405 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
406 {
407 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
408 }
409
410 static void system_set_sendredirects(struct device *dev, const char *val)
411 {
412 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
413 }
414
415 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
416 {
417 int fd = -1, ret = -1;
418
419 fd = open(path, O_RDONLY);
420 if (fd < 0)
421 goto out;
422
423 ssize_t len = read(fd, buf, buf_sz - 1);
424 if (len < 0)
425 goto out;
426
427 ret = buf[len] = 0;
428
429 out:
430 if (fd >= 0)
431 close(fd);
432
433 return ret;
434 }
435
436 static int
437 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
438 {
439 snprintf(dev_buf, sizeof(dev_buf), path, device);
440 return system_get_sysctl(dev_buf, buf, buf_sz);
441 }
442
443 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
444 {
445 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
446 dev->ifname, buf, buf_sz);
447 }
448
449 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
450 {
451 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
452 dev->ifname, buf, buf_sz);
453 }
454
455 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
456 {
457 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
458 dev->ifname, buf, buf_sz);
459 }
460
461 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
462 {
463 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
464 dev->ifname, buf, buf_sz);
465 }
466
467 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
468 {
469 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
470 dev->ifname, buf, buf_sz);
471 }
472
473 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
474 {
475 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
476 dev->ifname, buf, buf_sz);
477 }
478
479 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
480 {
481 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
482 dev->ifname, buf, buf_sz);
483 }
484
485 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
486 {
487 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
488 dev->ifname, buf, buf_sz);
489 }
490
491 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
492 {
493 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
494 dev->ifname, buf, buf_sz);
495 }
496
497 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
498 {
499 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
500 dev->ifname, buf, buf_sz);
501 }
502
503 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
504 {
505 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
506 dev->ifname, buf, buf_sz);
507 }
508
509 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
510 {
511 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
512 dev->ifname, buf, buf_sz);
513 }
514
515 // Evaluate netlink messages
516 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
517 {
518 struct nlmsghdr *nh = nlmsg_hdr(msg);
519 struct nlattr *nla[__IFLA_MAX];
520 int link_state = 0;
521 char buf[10];
522
523 if (nh->nlmsg_type != RTM_NEWLINK)
524 goto out;
525
526 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
527 if (!nla[IFLA_IFNAME])
528 goto out;
529
530 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
531 if (!dev)
532 goto out;
533
534 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
535 link_state = strtoul(buf, NULL, 0);
536
537 device_set_link(dev, link_state ? true : false);
538
539 out:
540 return 0;
541 }
542
543 static void
544 handle_hotplug_msg(char *data, int size)
545 {
546 const char *subsystem = NULL, *interface = NULL;
547 char *cur, *end, *sep;
548 struct device *dev;
549 int skip;
550 bool add;
551
552 if (!strncmp(data, "add@", 4))
553 add = true;
554 else if (!strncmp(data, "remove@", 7))
555 add = false;
556 else
557 return;
558
559 skip = strlen(data) + 1;
560 end = data + size;
561
562 for (cur = data + skip; cur < end; cur += skip) {
563 skip = strlen(cur) + 1;
564
565 sep = strchr(cur, '=');
566 if (!sep)
567 continue;
568
569 *sep = 0;
570 if (!strcmp(cur, "INTERFACE"))
571 interface = sep + 1;
572 else if (!strcmp(cur, "SUBSYSTEM")) {
573 subsystem = sep + 1;
574 if (strcmp(subsystem, "net") != 0)
575 return;
576 }
577 if (subsystem && interface)
578 goto found;
579 }
580 return;
581
582 found:
583 dev = device_find(interface);
584 if (!dev)
585 return;
586
587 if (dev->type != &simple_device_type)
588 return;
589
590 if (add && system_if_force_external(dev->ifname))
591 return;
592
593 device_set_present(dev, add);
594 }
595
596 static void
597 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
598 {
599 struct event_socket *ev = container_of(u, struct event_socket, uloop);
600 struct sockaddr_nl nla;
601 unsigned char *buf = NULL;
602 int size;
603
604 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
605 if (nla.nl_pid == 0)
606 handle_hotplug_msg((char *) buf, size);
607
608 free(buf);
609 }
610 }
611
612 static int system_rtnl_call(struct nl_msg *msg)
613 {
614 int ret;
615
616 ret = nl_send_auto_complete(sock_rtnl, msg);
617 nlmsg_free(msg);
618
619 if (ret < 0)
620 return ret;
621
622 return nl_wait_for_ack(sock_rtnl);
623 }
624
625 int system_bridge_delbr(struct device *bridge)
626 {
627 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
628 }
629
630 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
631 {
632 struct ifreq ifr;
633
634 memset(&ifr, 0, sizeof(ifr));
635 if (dev)
636 ifr.ifr_ifindex = dev->ifindex;
637 else
638 ifr.ifr_data = data;
639 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
640 return ioctl(sock_ioctl, cmd, &ifr);
641 }
642
643 static bool system_is_bridge(const char *name, char *buf, int buflen)
644 {
645 struct stat st;
646
647 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
648 if (stat(buf, &st) < 0)
649 return false;
650
651 return true;
652 }
653
654 static char *system_get_bridge(const char *name, char *buf, int buflen)
655 {
656 char *path;
657 ssize_t len = -1;
658 glob_t gl;
659
660 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
661 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
662 return NULL;
663
664 if (gl.gl_pathc > 0)
665 len = readlink(gl.gl_pathv[0], buf, buflen);
666
667 globfree(&gl);
668
669 if (len < 0)
670 return NULL;
671
672 buf[len] = 0;
673 path = strrchr(buf, '/');
674 if (!path)
675 return NULL;
676
677 return path + 1;
678 }
679
680 static void
681 system_bridge_set_wireless(struct device *bridge, struct device *dev)
682 {
683 bool mcast_to_ucast = dev->wireless_ap;
684 bool hairpin = true;
685
686 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
687 !bridge->settings.multicast_to_unicast)
688 mcast_to_ucast = false;
689
690 if (!mcast_to_ucast || dev->wireless_isolate)
691 hairpin = false;
692
693 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
694 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
695 }
696
697 int system_bridge_addif(struct device *bridge, struct device *dev)
698 {
699 char buf[64];
700 char *oldbr;
701 int ret = 0;
702
703 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
704 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
705 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
706
707 if (dev->wireless)
708 system_bridge_set_wireless(bridge, dev);
709
710 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
711 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
712 system_bridge_set_multicast_router(dev, buf, false);
713 }
714
715 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
716 dev->settings.multicast_fast_leave)
717 system_bridge_set_multicast_fast_leave(dev, "1");
718
719 if (dev->settings.flags & DEV_OPT_LEARNING &&
720 !dev->settings.learning)
721 system_bridge_set_learning(dev, "0");
722
723 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
724 !dev->settings.unicast_flood)
725 system_bridge_set_unicast_flood(dev, "0");
726
727 return ret;
728 }
729
730 int system_bridge_delif(struct device *bridge, struct device *dev)
731 {
732 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
733 }
734
735 int system_if_resolve(struct device *dev)
736 {
737 struct ifreq ifr;
738 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
739 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
740 return ifr.ifr_ifindex;
741 else
742 return 0;
743 }
744
745 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
746 {
747 struct ifreq ifr;
748
749 memset(&ifr, 0, sizeof(ifr));
750 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
751 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
752 ifr.ifr_flags |= add;
753 ifr.ifr_flags &= ~rem;
754 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
755 }
756
757 struct clear_data {
758 struct nl_msg *msg;
759 struct device *dev;
760 int type;
761 int size;
762 int af;
763 };
764
765
766 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
767 {
768 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
769
770 return ifa->ifa_index == ifindex;
771 }
772
773 static bool check_route(struct nlmsghdr *hdr, int ifindex)
774 {
775 struct rtmsg *r = NLMSG_DATA(hdr);
776 struct nlattr *tb[__RTA_MAX];
777
778 if (r->rtm_protocol == RTPROT_KERNEL &&
779 r->rtm_family == AF_INET6)
780 return false;
781
782 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
783 if (!tb[RTA_OIF])
784 return false;
785
786 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
787 }
788
789 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
790 {
791 return true;
792 }
793
794 static int cb_clear_event(struct nl_msg *msg, void *arg)
795 {
796 struct clear_data *clr = arg;
797 struct nlmsghdr *hdr = nlmsg_hdr(msg);
798 bool (*cb)(struct nlmsghdr *, int ifindex);
799 int type;
800
801 switch(clr->type) {
802 case RTM_GETADDR:
803 type = RTM_DELADDR;
804 if (hdr->nlmsg_type != RTM_NEWADDR)
805 return NL_SKIP;
806
807 cb = check_ifaddr;
808 break;
809 case RTM_GETROUTE:
810 type = RTM_DELROUTE;
811 if (hdr->nlmsg_type != RTM_NEWROUTE)
812 return NL_SKIP;
813
814 cb = check_route;
815 break;
816 case RTM_GETRULE:
817 type = RTM_DELRULE;
818 if (hdr->nlmsg_type != RTM_NEWRULE)
819 return NL_SKIP;
820
821 cb = check_rule;
822 break;
823 default:
824 return NL_SKIP;
825 }
826
827 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
828 return NL_SKIP;
829
830 if (type == RTM_DELRULE)
831 D(SYSTEM, "Remove a rule\n");
832 else
833 D(SYSTEM, "Remove %s from device %s\n",
834 type == RTM_DELADDR ? "an address" : "a route",
835 clr->dev->ifname);
836 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
837 hdr = nlmsg_hdr(clr->msg);
838 hdr->nlmsg_type = type;
839 hdr->nlmsg_flags = NLM_F_REQUEST;
840
841 nl_socket_disable_auto_ack(sock_rtnl);
842 nl_send_auto_complete(sock_rtnl, clr->msg);
843 nl_socket_enable_auto_ack(sock_rtnl);
844
845 return NL_SKIP;
846 }
847
848 static int
849 cb_finish_event(struct nl_msg *msg, void *arg)
850 {
851 int *pending = arg;
852 *pending = 0;
853 return NL_STOP;
854 }
855
856 static int
857 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
858 {
859 int *pending = arg;
860 *pending = err->error;
861 return NL_STOP;
862 }
863
864 static void
865 system_if_clear_entries(struct device *dev, int type, int af)
866 {
867 struct clear_data clr;
868 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
869 struct rtmsg rtm = {
870 .rtm_family = af,
871 .rtm_flags = RTM_F_CLONED,
872 };
873 int flags = NLM_F_DUMP;
874 int pending = 1;
875
876 clr.af = af;
877 clr.dev = dev;
878 clr.type = type;
879 switch (type) {
880 case RTM_GETADDR:
881 case RTM_GETRULE:
882 clr.size = sizeof(struct rtgenmsg);
883 break;
884 case RTM_GETROUTE:
885 clr.size = sizeof(struct rtmsg);
886 break;
887 default:
888 return;
889 }
890
891 if (!cb)
892 return;
893
894 clr.msg = nlmsg_alloc_simple(type, flags);
895 if (!clr.msg)
896 goto out;
897
898 nlmsg_append(clr.msg, &rtm, clr.size, 0);
899 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
900 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
901 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
902
903 nl_send_auto_complete(sock_rtnl, clr.msg);
904 while (pending > 0)
905 nl_recvmsgs(sock_rtnl, cb);
906
907 nlmsg_free(clr.msg);
908 out:
909 nl_cb_put(cb);
910 }
911
912 /*
913 * Clear bridge (membership) state and bring down device
914 */
915 void system_if_clear_state(struct device *dev)
916 {
917 static char buf[256];
918 char *bridge;
919
920 device_set_ifindex(dev, system_if_resolve(dev));
921 if (dev->external || !dev->ifindex)
922 return;
923
924 system_if_flags(dev->ifname, 0, IFF_UP);
925
926 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
927 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
928 system_bridge_delbr(dev);
929 return;
930 }
931
932 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
933 if (bridge) {
934 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
935 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
936 }
937
938 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
939 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
940 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
941 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
942 system_set_disable_ipv6(dev, "0");
943 }
944
945 static inline unsigned long
946 sec_to_jiffies(int val)
947 {
948 return (unsigned long) val * 100;
949 }
950
951 static void system_bridge_conf_multicast_deps(struct device *bridge,
952 struct bridge_config *cfg,
953 char *buf,
954 int buf_len)
955 {
956 int val;
957
958 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
959 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
960 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
961 val = cfg->robustness * cfg->query_interval +
962 cfg->query_response_interval;
963
964 snprintf(buf, buf_len, "%i", val);
965 system_bridge_set_membership_interval(bridge, buf);
966
967 val = cfg->robustness * cfg->query_interval +
968 cfg->query_response_interval / 2;
969
970 snprintf(buf, buf_len, "%i", val);
971 system_bridge_set_other_querier_timeout(bridge, buf);
972 }
973
974 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
975 val = cfg->query_interval / 4;
976
977 snprintf(buf, buf_len, "%i", val);
978 system_bridge_set_startup_query_interval(bridge, buf);
979 }
980 }
981
982 static void system_bridge_conf_multicast(struct device *bridge,
983 struct bridge_config *cfg,
984 char *buf,
985 int buf_len)
986 {
987 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
988 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
989
990 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
991 bridge->ifname, cfg->multicast_querier ? "1" : "0");
992
993 snprintf(buf, buf_len, "%i", cfg->hash_max);
994 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
995 bridge->ifname, buf);
996
997 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
998 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
999 system_bridge_set_multicast_router(bridge, buf, true);
1000 }
1001
1002 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1003 snprintf(buf, buf_len, "%i", cfg->robustness);
1004 system_bridge_set_robustness(bridge, buf);
1005 }
1006
1007 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1008 snprintf(buf, buf_len, "%i", cfg->query_interval);
1009 system_bridge_set_query_interval(bridge, buf);
1010 }
1011
1012 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1013 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1014 system_bridge_set_query_response_interval(bridge, buf);
1015 }
1016
1017 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1018 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1019 system_bridge_set_last_member_interval(bridge, buf);
1020 }
1021
1022 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1023 }
1024
1025 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1026 {
1027 char buf[64];
1028 unsigned long args[4] = {};
1029
1030 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1031 return -1;
1032
1033 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1034 args[1] = !!cfg->stp;
1035 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1036
1037 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1038 args[1] = sec_to_jiffies(cfg->forward_delay);
1039 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1040
1041 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1042
1043 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1044 args[1] = cfg->priority;
1045 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1046
1047 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1048 args[0] = BRCTL_SET_AGEING_TIME;
1049 args[1] = sec_to_jiffies(cfg->ageing_time);
1050 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1051 }
1052
1053 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1054 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1055 args[1] = sec_to_jiffies(cfg->hello_time);
1056 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1057 }
1058
1059 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1060 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1061 args[1] = sec_to_jiffies(cfg->max_age);
1062 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1063 }
1064
1065 return 0;
1066 }
1067
1068 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1069 {
1070 struct nl_msg *msg;
1071 struct nlattr *linkinfo, *data;
1072 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1073 int i, rv;
1074 static const struct {
1075 const char *name;
1076 enum macvlan_mode val;
1077 } modes[] = {
1078 { "private", MACVLAN_MODE_PRIVATE },
1079 { "vepa", MACVLAN_MODE_VEPA },
1080 { "bridge", MACVLAN_MODE_BRIDGE },
1081 { "passthru", MACVLAN_MODE_PASSTHRU },
1082 };
1083
1084 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1085
1086 if (!msg)
1087 return -1;
1088
1089 nlmsg_append(msg, &iim, sizeof(iim), 0);
1090
1091 if (cfg->flags & MACVLAN_OPT_MACADDR)
1092 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1093 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1094 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1095
1096 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1097 goto nla_put_failure;
1098
1099 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1100
1101 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1102 goto nla_put_failure;
1103
1104 if (cfg->mode) {
1105 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1106 if (strcmp(cfg->mode, modes[i].name) != 0)
1107 continue;
1108
1109 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1110 break;
1111 }
1112 }
1113
1114 nla_nest_end(msg, data);
1115 nla_nest_end(msg, linkinfo);
1116
1117 rv = system_rtnl_call(msg);
1118 if (rv)
1119 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1120
1121 return rv;
1122
1123 nla_put_failure:
1124 nlmsg_free(msg);
1125 return -ENOMEM;
1126 }
1127
1128 static int system_link_del(const char *ifname)
1129 {
1130 struct nl_msg *msg;
1131 struct ifinfomsg iim = {
1132 .ifi_family = AF_UNSPEC,
1133 .ifi_index = 0,
1134 };
1135
1136 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1137
1138 if (!msg)
1139 return -1;
1140
1141 nlmsg_append(msg, &iim, sizeof(iim), 0);
1142 nla_put_string(msg, IFLA_IFNAME, ifname);
1143 return system_rtnl_call(msg);
1144 }
1145
1146 int system_macvlan_del(struct device *macvlan)
1147 {
1148 return system_link_del(macvlan->ifname);
1149 }
1150
1151 int system_veth_add(struct device *veth, struct veth_config *cfg)
1152 {
1153 struct nl_msg *msg;
1154 struct ifinfomsg empty_iim = {};
1155 struct nlattr *linkinfo, *data, *veth_info;
1156 int rv;
1157
1158 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1159
1160 if (!msg)
1161 return -1;
1162
1163 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1164
1165 if (cfg->flags & VETH_OPT_MACADDR)
1166 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1167 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1168
1169 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1170 goto nla_put_failure;
1171
1172 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1173
1174 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1175 goto nla_put_failure;
1176
1177 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1178 goto nla_put_failure;
1179
1180 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1181
1182 if (cfg->flags & VETH_OPT_PEER_NAME)
1183 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1184 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1185 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1186
1187 nla_nest_end(msg, veth_info);
1188 nla_nest_end(msg, data);
1189 nla_nest_end(msg, linkinfo);
1190
1191 rv = system_rtnl_call(msg);
1192 if (rv) {
1193 if (cfg->flags & VETH_OPT_PEER_NAME)
1194 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1195 else
1196 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1197 }
1198
1199 return rv;
1200
1201 nla_put_failure:
1202 nlmsg_free(msg);
1203 return -ENOMEM;
1204 }
1205
1206 int system_veth_del(struct device *veth)
1207 {
1208 return system_link_del(veth->ifname);
1209 }
1210
1211 static int system_vlan(struct device *dev, int id)
1212 {
1213 struct vlan_ioctl_args ifr = {
1214 .cmd = SET_VLAN_NAME_TYPE_CMD,
1215 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1216 };
1217
1218 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1219
1220 if (id < 0) {
1221 ifr.cmd = DEL_VLAN_CMD;
1222 ifr.u.VID = 0;
1223 } else {
1224 ifr.cmd = ADD_VLAN_CMD;
1225 ifr.u.VID = id;
1226 }
1227 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1228 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1229 }
1230
1231 int system_vlan_add(struct device *dev, int id)
1232 {
1233 return system_vlan(dev, id);
1234 }
1235
1236 int system_vlan_del(struct device *dev)
1237 {
1238 return system_vlan(dev, -1);
1239 }
1240
1241 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1242 {
1243 struct nl_msg *msg;
1244 struct nlattr *linkinfo, *data;
1245 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1246 int rv;
1247
1248 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1249
1250 if (!msg)
1251 return -1;
1252
1253 nlmsg_append(msg, &iim, sizeof(iim), 0);
1254 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1255 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1256
1257 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1258 goto nla_put_failure;
1259
1260 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1261
1262 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1263 goto nla_put_failure;
1264
1265 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1266
1267 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1268 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1269 #else
1270 if(cfg->proto == VLAN_PROTO_8021AD)
1271 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);
1272 #endif
1273
1274 nla_nest_end(msg, data);
1275 nla_nest_end(msg, linkinfo);
1276
1277 rv = system_rtnl_call(msg);
1278 if (rv)
1279 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1280
1281 return rv;
1282
1283 nla_put_failure:
1284 nlmsg_free(msg);
1285 return -ENOMEM;
1286 }
1287
1288 int system_vlandev_del(struct device *vlandev)
1289 {
1290 return system_link_del(vlandev->ifname);
1291 }
1292
1293 void
1294 system_if_get_settings(struct device *dev, struct device_settings *s)
1295 {
1296 struct ifreq ifr;
1297 char buf[10];
1298
1299 memset(&ifr, 0, sizeof(ifr));
1300 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1301
1302 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1303 s->mtu = ifr.ifr_mtu;
1304 s->flags |= DEV_OPT_MTU;
1305 }
1306
1307 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1308 if (s->mtu6 > 0)
1309 s->flags |= DEV_OPT_MTU6;
1310
1311 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1312 s->txqueuelen = ifr.ifr_qlen;
1313 s->flags |= DEV_OPT_TXQUEUELEN;
1314 }
1315
1316 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1317 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1318 s->flags |= DEV_OPT_MACADDR;
1319 }
1320
1321 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1322 s->ipv6 = !strtoul(buf, NULL, 0);
1323 s->flags |= DEV_OPT_IPV6;
1324 }
1325
1326 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1327 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1328 s->flags |= DEV_OPT_PROMISC;
1329
1330 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1331 s->flags |= DEV_OPT_MULTICAST;
1332 }
1333
1334 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1335 s->rpfilter = strtoul(buf, NULL, 0);
1336 s->flags |= DEV_OPT_RPFILTER;
1337 }
1338
1339 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1340 s->acceptlocal = strtoul(buf, NULL, 0);
1341 s->flags |= DEV_OPT_ACCEPTLOCAL;
1342 }
1343
1344 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1345 s->igmpversion = strtoul(buf, NULL, 0);
1346 s->flags |= DEV_OPT_IGMPVERSION;
1347 }
1348
1349 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1350 s->mldversion = strtoul(buf, NULL, 0);
1351 s->flags |= DEV_OPT_MLDVERSION;
1352 }
1353
1354 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1355 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1356 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1357 }
1358
1359 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1360 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1361 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1362 }
1363
1364 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1365 s->neigh4locktime = strtoul(buf, NULL, 0);
1366 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1367 }
1368
1369 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1370 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1371 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1372 }
1373
1374 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1375 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1376 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1377 }
1378
1379 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1380 s->dadtransmits = strtoul(buf, NULL, 0);
1381 s->flags |= DEV_OPT_DADTRANSMITS;
1382 }
1383
1384 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1385 s->sendredirects = strtoul(buf, NULL, 0);
1386 s->flags |= DEV_OPT_SENDREDIRECTS;
1387 }
1388 }
1389
1390 static void
1391 system_if_set_rps_xps_val(const char *path, int val)
1392 {
1393 char val_buf[8];
1394 glob_t gl;
1395 int i;
1396
1397 if (glob(path, 0, NULL, &gl))
1398 return;
1399
1400 snprintf(val_buf, sizeof(val_buf), "%x", val);
1401 for (i = 0; i < gl.gl_pathc; i++)
1402 system_set_sysctl(gl.gl_pathv[i], val_buf);
1403
1404 globfree(&gl);
1405 }
1406
1407 static void
1408 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1409 {
1410 long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1411 int val;
1412
1413 if (n_cpus < 2)
1414 return;
1415
1416 val = (1 << n_cpus) - 1;
1417 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1418 system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1419
1420 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1421 system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1422 }
1423
1424 void
1425 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1426 {
1427 struct ifreq ifr;
1428 char buf[12];
1429
1430 memset(&ifr, 0, sizeof(ifr));
1431 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1432 if (s->flags & DEV_OPT_MTU & apply_mask) {
1433 ifr.ifr_mtu = s->mtu;
1434 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1435 s->flags &= ~DEV_OPT_MTU;
1436 }
1437 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1438 system_update_ipv6_mtu(dev, s->mtu6);
1439 }
1440 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1441 ifr.ifr_qlen = s->txqueuelen;
1442 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1443 s->flags &= ~DEV_OPT_TXQUEUELEN;
1444 }
1445 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1446 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1447 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1448 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1449 s->flags &= ~DEV_OPT_MACADDR;
1450 }
1451 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1452 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1453 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1454 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1455 !s->promisc ? IFF_PROMISC : 0) < 0)
1456 s->flags &= ~DEV_OPT_PROMISC;
1457 }
1458 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1459 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1460 system_set_rpfilter(dev, buf);
1461 }
1462 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1463 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1464 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1465 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1466 system_set_igmpversion(dev, buf);
1467 }
1468 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1469 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1470 system_set_mldversion(dev, buf);
1471 }
1472 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1473 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1474 system_set_neigh4reachabletime(dev, buf);
1475 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1476 system_set_neigh6reachabletime(dev, buf);
1477 }
1478 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1479 snprintf(buf, sizeof(buf), "%u", s->neigh4locktime);
1480 system_set_neigh4locktime(dev, buf);
1481 }
1482 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1483 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1484 system_set_neigh4gcstaletime(dev, buf);
1485 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1486 system_set_neigh6gcstaletime(dev, buf);
1487 }
1488 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1489 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1490 system_set_dadtransmits(dev, buf);
1491 }
1492 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1493 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1494 !s->multicast ? IFF_MULTICAST : 0) < 0)
1495 s->flags &= ~DEV_OPT_MULTICAST;
1496 }
1497 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1498 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1499
1500 system_if_apply_rps_xps(dev, s);
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 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1578 if (!msg)
1579 goto out;
1580
1581 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1582 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1583 goto free;
1584
1585 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1586 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1587 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1588
1589 nl_send_auto_complete(sock_rtnl, msg);
1590 while (chk.pending > 0)
1591 nl_recvmsgs(sock_rtnl, cb);
1592
1593 ret = chk.pending;
1594
1595 free:
1596 nlmsg_free(msg);
1597 out:
1598 nl_cb_put(cb);
1599 return ret;
1600 }
1601
1602 struct device *
1603 system_if_get_parent(struct device *dev)
1604 {
1605 char buf[64], *devname;
1606 int ifindex, iflink, len;
1607 FILE *f;
1608
1609 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1610 f = fopen(buf, "r");
1611 if (!f)
1612 return NULL;
1613
1614 len = fread(buf, 1, sizeof(buf) - 1, f);
1615 fclose(f);
1616
1617 if (len <= 0)
1618 return NULL;
1619
1620 buf[len] = 0;
1621 iflink = strtoul(buf, NULL, 0);
1622 ifindex = system_if_resolve(dev);
1623 if (!iflink || iflink == ifindex)
1624 return NULL;
1625
1626 devname = if_indextoname(iflink, buf);
1627 if (!devname)
1628 return NULL;
1629
1630 return device_get(devname, true);
1631 }
1632
1633 static bool
1634 read_string_file(int dir_fd, const char *file, char *buf, int len)
1635 {
1636 bool ret = false;
1637 char *c;
1638 int fd;
1639
1640 fd = openat(dir_fd, file, O_RDONLY);
1641 if (fd < 0)
1642 return false;
1643
1644 retry:
1645 len = read(fd, buf, len - 1);
1646 if (len < 0) {
1647 if (errno == EINTR)
1648 goto retry;
1649 } else if (len > 0) {
1650 buf[len] = 0;
1651
1652 c = strchr(buf, '\n');
1653 if (c)
1654 *c = 0;
1655
1656 ret = true;
1657 }
1658
1659 close(fd);
1660
1661 return ret;
1662 }
1663
1664 static bool
1665 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1666 {
1667 char buf[64];
1668 bool ret = false;
1669
1670 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1671 if (ret)
1672 *val = strtoull(buf, NULL, 0);
1673
1674 return ret;
1675 }
1676
1677 /* Assume advertised flags == supported flags */
1678 static const struct {
1679 uint32_t mask;
1680 const char *name;
1681 } ethtool_link_modes[] = {
1682 { ADVERTISED_10baseT_Half, "10H" },
1683 { ADVERTISED_10baseT_Full, "10F" },
1684 { ADVERTISED_100baseT_Half, "100H" },
1685 { ADVERTISED_100baseT_Full, "100F" },
1686 { ADVERTISED_1000baseT_Half, "1000H" },
1687 { ADVERTISED_1000baseT_Full, "1000F" },
1688 };
1689
1690 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1691 {
1692 int i;
1693 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1694 if (mask & ethtool_link_modes[i].mask)
1695 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1696 }
1697 }
1698
1699 bool
1700 system_if_force_external(const char *ifname)
1701 {
1702 char buf[64];
1703 struct stat s;
1704
1705 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1706 return stat(buf, &s) == 0;
1707 }
1708
1709 int
1710 system_if_dump_info(struct device *dev, struct blob_buf *b)
1711 {
1712 struct ethtool_cmd ecmd;
1713 struct ifreq ifr;
1714 char buf[64], *s;
1715 void *c;
1716 int dir_fd;
1717
1718 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1719 dir_fd = open(buf, O_DIRECTORY);
1720
1721 memset(&ecmd, 0, sizeof(ecmd));
1722 memset(&ifr, 0, sizeof(ifr));
1723 strcpy(ifr.ifr_name, dev->ifname);
1724 ifr.ifr_data = (caddr_t) &ecmd;
1725 ecmd.cmd = ETHTOOL_GSET;
1726
1727 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1728 c = blobmsg_open_array(b, "link-advertising");
1729 system_add_link_modes(b, ecmd.advertising);
1730 blobmsg_close_array(b, c);
1731
1732 c = blobmsg_open_array(b, "link-supported");
1733 system_add_link_modes(b, ecmd.supported);
1734 blobmsg_close_array(b, c);
1735
1736 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1737 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1738 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1739 blobmsg_add_string_buffer(b);
1740 }
1741
1742 close(dir_fd);
1743 return 0;
1744 }
1745
1746 int
1747 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1748 {
1749 const char *const counters[] = {
1750 "collisions", "rx_frame_errors", "tx_compressed",
1751 "multicast", "rx_length_errors", "tx_dropped",
1752 "rx_bytes", "rx_missed_errors", "tx_errors",
1753 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1754 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1755 "rx_dropped", "tx_aborted_errors", "tx_packets",
1756 "rx_errors", "tx_bytes", "tx_window_errors",
1757 "rx_fifo_errors", "tx_carrier_errors",
1758 };
1759 char buf[64];
1760 int stats_dir;
1761 int i;
1762 uint64_t val = 0;
1763
1764 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1765 stats_dir = open(buf, O_DIRECTORY);
1766 if (stats_dir < 0)
1767 return -1;
1768
1769 for (i = 0; i < ARRAY_SIZE(counters); i++)
1770 if (read_uint64_file(stats_dir, counters[i], &val))
1771 blobmsg_add_u64(b, counters[i], val);
1772
1773 close(stats_dir);
1774 return 0;
1775 }
1776
1777 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1778 {
1779 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1780 int alen = v4 ? 4 : 16;
1781 unsigned int flags = 0;
1782 struct ifaddrmsg ifa = {
1783 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1784 .ifa_prefixlen = addr->mask,
1785 .ifa_index = dev->ifindex,
1786 };
1787
1788 struct nl_msg *msg;
1789 if (cmd == RTM_NEWADDR)
1790 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1791
1792 msg = nlmsg_alloc_simple(cmd, flags);
1793 if (!msg)
1794 return -1;
1795
1796 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1797 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1798 if (v4) {
1799 if (addr->broadcast)
1800 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1801 if (addr->point_to_point)
1802 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1803 } else {
1804 time_t now = system_get_rtime();
1805 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1806
1807 if (addr->preferred_until) {
1808 int64_t preferred = addr->preferred_until - now;
1809 if (preferred < 0)
1810 preferred = 0;
1811 else if (preferred > UINT32_MAX)
1812 preferred = UINT32_MAX;
1813
1814 cinfo.ifa_prefered = preferred;
1815 }
1816
1817 if (addr->valid_until) {
1818 int64_t valid = addr->valid_until - now;
1819 if (valid <= 0) {
1820 nlmsg_free(msg);
1821 return -1;
1822 }
1823 else if (valid > UINT32_MAX)
1824 valid = UINT32_MAX;
1825
1826 cinfo.ifa_valid = valid;
1827 }
1828
1829 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1830
1831 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1832 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1833 }
1834
1835 return system_rtnl_call(msg);
1836 }
1837
1838 int system_add_address(struct device *dev, struct device_addr *addr)
1839 {
1840 return system_addr(dev, addr, RTM_NEWADDR);
1841 }
1842
1843 int system_del_address(struct device *dev, struct device_addr *addr)
1844 {
1845 return system_addr(dev, addr, RTM_DELADDR);
1846 }
1847
1848 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1849 {
1850 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1851 bool have_gw;
1852 unsigned int flags = 0;
1853
1854 if (alen == 4)
1855 have_gw = !!route->nexthop.in.s_addr;
1856 else
1857 have_gw = route->nexthop.in6.s6_addr32[0] ||
1858 route->nexthop.in6.s6_addr32[1] ||
1859 route->nexthop.in6.s6_addr32[2] ||
1860 route->nexthop.in6.s6_addr32[3];
1861
1862 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1863 ? route->table : RT_TABLE_MAIN;
1864
1865 struct rtmsg rtm = {
1866 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1867 .rtm_dst_len = route->mask,
1868 .rtm_src_len = route->sourcemask,
1869 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1870 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1871 .rtm_scope = RT_SCOPE_NOWHERE,
1872 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1873 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1874 };
1875 struct nl_msg *msg;
1876
1877 if (cmd == RTM_NEWROUTE) {
1878 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1879
1880 if (!dev) { // Add null-route
1881 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1882 rtm.rtm_type = RTN_UNREACHABLE;
1883 }
1884 else
1885 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1886 }
1887
1888 if (route->flags & DEVROUTE_TYPE) {
1889 rtm.rtm_type = route->type;
1890 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1891 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1892 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1893 rtm.rtm_table = RT_TABLE_LOCAL;
1894 }
1895
1896 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1897 rtm.rtm_scope = RT_SCOPE_HOST;
1898 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1899 rtm.rtm_type == RTN_ANYCAST) {
1900 rtm.rtm_scope = RT_SCOPE_LINK;
1901 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1902 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1903 rtm.rtm_type == RTN_THROW) {
1904 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1905 dev = NULL;
1906 }
1907 }
1908
1909 msg = nlmsg_alloc_simple(cmd, flags);
1910 if (!msg)
1911 return -1;
1912
1913 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1914
1915 if (route->mask)
1916 nla_put(msg, RTA_DST, alen, &route->addr);
1917
1918 if (route->sourcemask) {
1919 if (rtm.rtm_family == AF_INET)
1920 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1921 else
1922 nla_put(msg, RTA_SRC, alen, &route->source);
1923 }
1924
1925 if (route->metric > 0)
1926 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1927
1928 if (have_gw)
1929 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1930
1931 if (dev)
1932 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1933
1934 if (table >= 256)
1935 nla_put_u32(msg, RTA_TABLE, table);
1936
1937 if (route->flags & DEVROUTE_MTU) {
1938 struct nlattr *metrics;
1939
1940 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1941 goto nla_put_failure;
1942
1943 nla_put_u32(msg, RTAX_MTU, route->mtu);
1944
1945 nla_nest_end(msg, metrics);
1946 }
1947
1948 return system_rtnl_call(msg);
1949
1950 nla_put_failure:
1951 nlmsg_free(msg);
1952 return -ENOMEM;
1953 }
1954
1955 int system_add_route(struct device *dev, struct device_route *route)
1956 {
1957 return system_rt(dev, route, RTM_NEWROUTE);
1958 }
1959
1960 int system_del_route(struct device *dev, struct device_route *route)
1961 {
1962 return system_rt(dev, route, RTM_DELROUTE);
1963 }
1964
1965 int system_flush_routes(void)
1966 {
1967 const char *names[] = {
1968 "/proc/sys/net/ipv4/route/flush",
1969 "/proc/sys/net/ipv6/route/flush"
1970 };
1971 int fd, i;
1972
1973 for (i = 0; i < ARRAY_SIZE(names); i++) {
1974 fd = open(names[i], O_WRONLY);
1975 if (fd < 0)
1976 continue;
1977
1978 if (write(fd, "-1", 2)) {}
1979 close(fd);
1980 }
1981 return 0;
1982 }
1983
1984 bool system_resolve_rt_type(const char *type, unsigned int *id)
1985 {
1986 return system_rtn_aton(type, id);
1987 }
1988
1989 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1990 {
1991 FILE *f;
1992 char *e, buf[128];
1993 unsigned int n, proto = 256;
1994 n = strtoul(type, &e, 0);
1995 if (!*e && e != type)
1996 proto = n;
1997 else if (!strcmp(type, "unspec"))
1998 proto = RTPROT_UNSPEC;
1999 else if (!strcmp(type, "kernel"))
2000 proto = RTPROT_KERNEL;
2001 else if (!strcmp(type, "boot"))
2002 proto = RTPROT_BOOT;
2003 else if (!strcmp(type, "static"))
2004 proto = RTPROT_STATIC;
2005 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2006 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2007 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2008 continue;
2009
2010 n = strtoul(e, NULL, 10);
2011 e = strtok(NULL, " \t\n");
2012
2013 if (e && !strcmp(e, type)) {
2014 proto = n;
2015 break;
2016 }
2017 }
2018 fclose(f);
2019 }
2020
2021 if (proto > 255)
2022 return false;
2023
2024 *id = proto;
2025 return true;
2026 }
2027
2028 bool system_resolve_rt_table(const char *name, unsigned int *id)
2029 {
2030 FILE *f;
2031 char *e, buf[128];
2032 unsigned int n, table = RT_TABLE_UNSPEC;
2033
2034 /* first try to parse table as number */
2035 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2036 table = n;
2037
2038 /* handle well known aliases */
2039 else if (!strcmp(name, "default"))
2040 table = RT_TABLE_DEFAULT;
2041 else if (!strcmp(name, "main"))
2042 table = RT_TABLE_MAIN;
2043 else if (!strcmp(name, "local"))
2044 table = RT_TABLE_LOCAL;
2045
2046 /* try to look up name in /etc/iproute2/rt_tables */
2047 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2048 {
2049 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2050 {
2051 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2052 continue;
2053
2054 n = strtoul(e, NULL, 10);
2055 e = strtok(NULL, " \t\n");
2056
2057 if (e && !strcmp(e, name))
2058 {
2059 table = n;
2060 break;
2061 }
2062 }
2063
2064 fclose(f);
2065 }
2066
2067 if (table == RT_TABLE_UNSPEC)
2068 return false;
2069
2070 *id = table;
2071 return true;
2072 }
2073
2074 bool system_is_default_rt_table(unsigned int id)
2075 {
2076 return (id == RT_TABLE_MAIN);
2077 }
2078
2079 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2080 {
2081 char *e;
2082 unsigned int n;
2083
2084 if (!strcmp(filter, "strict"))
2085 n = 1;
2086 else if (!strcmp(filter, "loose"))
2087 n = 2;
2088 else {
2089 n = strtoul(filter, &e, 0);
2090 if (*e || e == filter || n > 2)
2091 return false;
2092 }
2093
2094 *id = n;
2095 return true;
2096 }
2097
2098 static int system_iprule(struct iprule *rule, int cmd)
2099 {
2100 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2101
2102 struct nl_msg *msg;
2103 struct rtmsg rtm = {
2104 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2105 .rtm_protocol = RTPROT_STATIC,
2106 .rtm_scope = RT_SCOPE_UNIVERSE,
2107 .rtm_table = RT_TABLE_UNSPEC,
2108 .rtm_type = RTN_UNSPEC,
2109 .rtm_flags = 0,
2110 };
2111
2112 if (cmd == RTM_NEWRULE)
2113 rtm.rtm_type = RTN_UNICAST;
2114
2115 if (rule->invert)
2116 rtm.rtm_flags |= FIB_RULE_INVERT;
2117
2118 if (rule->flags & IPRULE_SRC)
2119 rtm.rtm_src_len = rule->src_mask;
2120
2121 if (rule->flags & IPRULE_DEST)
2122 rtm.rtm_dst_len = rule->dest_mask;
2123
2124 if (rule->flags & IPRULE_TOS)
2125 rtm.rtm_tos = rule->tos;
2126
2127 if (rule->flags & IPRULE_LOOKUP) {
2128 if (rule->lookup < 256)
2129 rtm.rtm_table = rule->lookup;
2130 }
2131
2132 if (rule->flags & IPRULE_ACTION)
2133 rtm.rtm_type = rule->action;
2134 else if (rule->flags & IPRULE_GOTO)
2135 rtm.rtm_type = FR_ACT_GOTO;
2136 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2137 rtm.rtm_type = FR_ACT_NOP;
2138
2139 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2140
2141 if (!msg)
2142 return -1;
2143
2144 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2145
2146 if (rule->flags & IPRULE_IN)
2147 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2148
2149 if (rule->flags & IPRULE_OUT)
2150 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2151
2152 if (rule->flags & IPRULE_SRC)
2153 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2154
2155 if (rule->flags & IPRULE_DEST)
2156 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2157
2158 if (rule->flags & IPRULE_PRIORITY)
2159 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2160 else if (cmd == RTM_NEWRULE)
2161 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2162
2163 if (rule->flags & IPRULE_FWMARK)
2164 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2165
2166 if (rule->flags & IPRULE_FWMASK)
2167 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2168
2169 if (rule->flags & IPRULE_LOOKUP) {
2170 if (rule->lookup >= 256)
2171 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2172 }
2173
2174 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2175 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2176
2177 if (rule->flags & IPRULE_GOTO)
2178 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2179
2180 return system_rtnl_call(msg);
2181 }
2182
2183 int system_add_iprule(struct iprule *rule)
2184 {
2185 return system_iprule(rule, RTM_NEWRULE);
2186 }
2187
2188 int system_del_iprule(struct iprule *rule)
2189 {
2190 return system_iprule(rule, RTM_DELRULE);
2191 }
2192
2193 int system_flush_iprules(void)
2194 {
2195 int rv = 0;
2196 struct iprule rule;
2197
2198 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2199 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2200
2201 memset(&rule, 0, sizeof(rule));
2202
2203
2204 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2205
2206 rule.priority = 0;
2207 rule.lookup = RT_TABLE_LOCAL;
2208 rv |= system_iprule(&rule, RTM_NEWRULE);
2209
2210 rule.priority = 32766;
2211 rule.lookup = RT_TABLE_MAIN;
2212 rv |= system_iprule(&rule, RTM_NEWRULE);
2213
2214 rule.priority = 32767;
2215 rule.lookup = RT_TABLE_DEFAULT;
2216 rv |= system_iprule(&rule, RTM_NEWRULE);
2217
2218
2219 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2220
2221 rule.priority = 0;
2222 rule.lookup = RT_TABLE_LOCAL;
2223 rv |= system_iprule(&rule, RTM_NEWRULE);
2224
2225 rule.priority = 32766;
2226 rule.lookup = RT_TABLE_MAIN;
2227 rv |= system_iprule(&rule, RTM_NEWRULE);
2228
2229 return rv;
2230 }
2231
2232 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2233 {
2234 return system_rtn_aton(action, id);
2235 }
2236
2237 time_t system_get_rtime(void)
2238 {
2239 struct timespec ts;
2240 struct timeval tv;
2241
2242 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2243 return ts.tv_sec;
2244
2245 if (gettimeofday(&tv, NULL) == 0)
2246 return tv.tv_sec;
2247
2248 return 0;
2249 }
2250
2251 #ifndef IP_DF
2252 #define IP_DF 0x4000
2253 #endif
2254
2255 static int tunnel_ioctl(const char *name, int cmd, void *p)
2256 {
2257 struct ifreq ifr;
2258
2259 memset(&ifr, 0, sizeof(ifr));
2260 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2261 ifr.ifr_ifru.ifru_data = p;
2262 return ioctl(sock_ioctl, cmd, &ifr);
2263 }
2264
2265 #ifdef IFLA_IPTUN_MAX
2266 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2267 static int system_add_gre_tunnel(const char *name, const char *kind,
2268 const unsigned int link, struct blob_attr **tb, bool v6)
2269 {
2270 struct nl_msg *nlm;
2271 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2272 struct blob_attr *cur;
2273 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2274 uint16_t iflags = 0, oflags = 0;
2275 uint8_t tos = 0;
2276 int ret = 0, ttl = 0;
2277
2278 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2279 if (!nlm)
2280 return -1;
2281
2282 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2283 nla_put_string(nlm, IFLA_IFNAME, name);
2284
2285 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2286 if (!linkinfo) {
2287 ret = -ENOMEM;
2288 goto failure;
2289 }
2290
2291 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2292 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2293 if (!infodata) {
2294 ret = -ENOMEM;
2295 goto failure;
2296 }
2297
2298 if (link)
2299 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2300
2301 if ((cur = tb[TUNNEL_ATTR_TTL]))
2302 ttl = blobmsg_get_u32(cur);
2303
2304 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2305 char *str = blobmsg_get_string(cur);
2306 if (strcmp(str, "inherit")) {
2307 unsigned uval;
2308
2309 if (!system_tos_aton(str, &uval)) {
2310 ret = -EINVAL;
2311 goto failure;
2312 }
2313
2314 if (v6)
2315 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2316 else
2317 tos = uval;
2318 } else {
2319 if (v6)
2320 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2321 else
2322 tos = 1;
2323 }
2324 }
2325
2326 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2327 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2328
2329 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2330 blobmsg_data(cur), blobmsg_len(cur));
2331
2332 if ((cur = tb_data[GRE_DATA_IKEY])) {
2333 if ((ikey = blobmsg_get_u32(cur)))
2334 iflags |= GRE_KEY;
2335 }
2336
2337 if ((cur = tb_data[GRE_DATA_OKEY])) {
2338 if ((okey = blobmsg_get_u32(cur)))
2339 oflags |= GRE_KEY;
2340 }
2341
2342 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2343 if (blobmsg_get_bool(cur))
2344 iflags |= GRE_CSUM;
2345 }
2346
2347 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2348 if (blobmsg_get_bool(cur))
2349 oflags |= GRE_CSUM;
2350 }
2351
2352 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2353 if (blobmsg_get_bool(cur))
2354 iflags |= GRE_SEQ;
2355 }
2356
2357 if ((cur = tb[GRE_DATA_OSEQNO])) {
2358 if (blobmsg_get_bool(cur))
2359 oflags |= GRE_SEQ;
2360 }
2361 }
2362
2363 if (v6) {
2364 struct in6_addr in6buf;
2365 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2366 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2367 ret = -EINVAL;
2368 goto failure;
2369 }
2370 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2371 }
2372
2373 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2374 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2375 ret = -EINVAL;
2376 goto failure;
2377 }
2378 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2379 }
2380 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2381
2382 if (flowinfo)
2383 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2384
2385 if (flags)
2386 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2387
2388 if (!ttl)
2389 ttl = 64;
2390 } else {
2391 struct in_addr inbuf;
2392 bool set_df = true;
2393
2394 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2395 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2396 ret = -EINVAL;
2397 goto failure;
2398 }
2399 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2400 }
2401
2402 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2403 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2404 ret = -EINVAL;
2405 goto failure;
2406 }
2407 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2408
2409 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2410 if (!okey) {
2411 okey = inbuf.s_addr;
2412 oflags |= GRE_KEY;
2413 }
2414
2415 if (!ikey) {
2416 ikey = inbuf.s_addr;
2417 iflags |= GRE_KEY;
2418 }
2419 }
2420 }
2421
2422 if ((cur = tb[TUNNEL_ATTR_DF]))
2423 set_df = blobmsg_get_bool(cur);
2424
2425 if (!set_df) {
2426 /* ttl != 0 and nopmtudisc are incompatible */
2427 if (ttl) {
2428 ret = -EINVAL;
2429 goto failure;
2430 }
2431 } else if (!ttl)
2432 ttl = 64;
2433
2434 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2435
2436 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2437 }
2438
2439 if (ttl)
2440 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2441
2442 if (oflags)
2443 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2444
2445 if (iflags)
2446 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2447
2448 if (okey)
2449 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2450
2451 if (ikey)
2452 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2453
2454 nla_nest_end(nlm, infodata);
2455 nla_nest_end(nlm, linkinfo);
2456
2457 return system_rtnl_call(nlm);
2458
2459 failure:
2460 nlmsg_free(nlm);
2461 return ret;
2462 }
2463 #endif
2464
2465 #ifdef IFLA_VTI_MAX
2466 static int system_add_vti_tunnel(const char *name, const char *kind,
2467 const unsigned int link, struct blob_attr **tb, bool v6)
2468 {
2469 struct nl_msg *nlm;
2470 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2471 struct blob_attr *cur;
2472 int ret = 0;
2473
2474 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2475 if (!nlm)
2476 return -1;
2477
2478 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2479 nla_put_string(nlm, IFLA_IFNAME, name);
2480
2481 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2482 if (!linkinfo) {
2483 ret = -ENOMEM;
2484 goto failure;
2485 }
2486
2487 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2488 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2489 if (!infodata) {
2490 ret = -ENOMEM;
2491 goto failure;
2492 }
2493
2494 if (link)
2495 nla_put_u32(nlm, IFLA_VTI_LINK, link);
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_VTI_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_VTI_REMOTE, sizeof(in6buf), &in6buf);
2513 }
2514
2515 } else {
2516 struct in_addr inbuf;
2517
2518 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2519 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2520 ret = -EINVAL;
2521 goto failure;
2522 }
2523 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2524 }
2525
2526 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2527 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2528 ret = -EINVAL;
2529 goto failure;
2530 }
2531 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2532 }
2533
2534 }
2535
2536 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2537 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2538 uint32_t ikey = 0, okey = 0;
2539
2540 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2541 blobmsg_data(cur), blobmsg_len(cur));
2542
2543 if ((cur = tb_data[VTI_DATA_IKEY])) {
2544 if ((ikey = blobmsg_get_u32(cur)))
2545 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2546 }
2547
2548 if ((cur = tb_data[VTI_DATA_OKEY])) {
2549 if ((okey = blobmsg_get_u32(cur)))
2550 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2551 }
2552 }
2553
2554 nla_nest_end(nlm, infodata);
2555 nla_nest_end(nlm, linkinfo);
2556
2557 return system_rtnl_call(nlm);
2558
2559 failure:
2560 nlmsg_free(nlm);
2561 return ret;
2562 }
2563 #endif
2564
2565 #ifdef IFLA_VXLAN_MAX
2566 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2567 {
2568 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2569 struct nl_msg *msg;
2570 struct nlattr *linkinfo, *data;
2571 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2572 struct blob_attr *cur;
2573 int ret = 0;
2574
2575 if ((cur = tb[TUNNEL_ATTR_DATA]))
2576 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2577 blobmsg_data(cur), blobmsg_len(cur));
2578 else
2579 return -EINVAL;
2580
2581 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2582
2583 if (!msg)
2584 return -1;
2585
2586 nlmsg_append(msg, &iim, sizeof(iim), 0);
2587
2588 nla_put_string(msg, IFLA_IFNAME, name);
2589
2590 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2591 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2592 if (!ea) {
2593 ret = -EINVAL;
2594 goto failure;
2595 }
2596
2597 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2598 }
2599
2600 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2601 uint32_t mtu = blobmsg_get_u32(cur);
2602 nla_put_u32(msg, IFLA_MTU, mtu);
2603 }
2604
2605 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2606 ret = -ENOMEM;
2607 goto failure;
2608 }
2609
2610 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2611
2612 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2613 ret = -ENOMEM;
2614 goto failure;
2615 }
2616
2617 if (link)
2618 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2619
2620 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2621 uint32_t id = blobmsg_get_u32(cur);
2622 if (id >= (1u << 24) - 1) {
2623 ret = -EINVAL;
2624 goto failure;
2625 }
2626
2627 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2628 }
2629
2630 if (v6) {
2631 struct in6_addr in6buf;
2632 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2633 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2634 ret = -EINVAL;
2635 goto failure;
2636 }
2637 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2638 }
2639
2640 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2641 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2642 ret = -EINVAL;
2643 goto failure;
2644 }
2645 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2646 }
2647 } else {
2648 struct in_addr inbuf;
2649
2650 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2651 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2652 ret = -EINVAL;
2653 goto failure;
2654 }
2655 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2656 }
2657
2658 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2659 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2660 ret = -EINVAL;
2661 goto failure;
2662 }
2663 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2664 }
2665 }
2666
2667 uint32_t port = 4789;
2668 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2669 port = blobmsg_get_u32(cur);
2670 if (port < 1 || port > 65535) {
2671 ret = -EINVAL;
2672 goto failure;
2673 }
2674 }
2675 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2676
2677 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2678 char *str = blobmsg_get_string(cur);
2679 unsigned tos = 1;
2680
2681 if (strcmp(str, "inherit")) {
2682 if (!system_tos_aton(str, &tos))
2683 return -EINVAL;
2684 }
2685
2686 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2687 }
2688
2689 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2690 uint32_t ttl = blobmsg_get_u32(cur);
2691 if (ttl < 1 || ttl > 255) {
2692 ret = -EINVAL;
2693 goto failure;
2694 }
2695
2696 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2697 }
2698
2699 nla_nest_end(msg, data);
2700 nla_nest_end(msg, linkinfo);
2701
2702 ret = system_rtnl_call(msg);
2703 if (ret)
2704 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2705
2706 return ret;
2707
2708 failure:
2709 nlmsg_free(msg);
2710 return ret;
2711 }
2712 #endif
2713
2714 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2715 {
2716 struct blob_attr *cur;
2717 int ret = 0;
2718
2719 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2720 return -1;
2721
2722 #ifdef SIOCADD6RD
2723 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2724 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2725 unsigned int mask;
2726 struct ip_tunnel_6rd p6;
2727
2728 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2729 blobmsg_data(cur), blobmsg_len(cur));
2730
2731 memset(&p6, 0, sizeof(p6));
2732
2733 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2734 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2735 &p6.prefix, &mask) || mask > 128) {
2736 ret = -EINVAL;
2737 goto failure;
2738 }
2739
2740 p6.prefixlen = mask;
2741 }
2742
2743 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2744 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2745 &p6.relay_prefix, &mask) || mask > 32) {
2746 ret = -EINVAL;
2747 goto failure;
2748 }
2749
2750 p6.relay_prefixlen = mask;
2751 }
2752
2753 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2754 ret = -1;
2755 goto failure;
2756 }
2757 }
2758 #endif
2759
2760 return ret;
2761
2762 failure:
2763 __system_del_ip_tunnel(name, tb);
2764 return ret;
2765 }
2766
2767 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2768 {
2769 struct blob_attr *cur;
2770 bool set_df = true;
2771 struct ip_tunnel_parm p = {
2772 .link = link,
2773 .iph = {
2774 .version = 4,
2775 .ihl = 5,
2776 .protocol = proto,
2777 }
2778 };
2779
2780 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2781 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2782 return -EINVAL;
2783
2784 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2785 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2786 return -EINVAL;
2787
2788 if ((cur = tb[TUNNEL_ATTR_DF]))
2789 set_df = blobmsg_get_bool(cur);
2790
2791 if ((cur = tb[TUNNEL_ATTR_TTL]))
2792 p.iph.ttl = blobmsg_get_u32(cur);
2793
2794 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2795 char *str = blobmsg_get_string(cur);
2796 if (strcmp(str, "inherit")) {
2797 unsigned uval;
2798
2799 if (!system_tos_aton(str, &uval))
2800 return -EINVAL;
2801
2802 p.iph.tos = uval;
2803 } else
2804 p.iph.tos = 1;
2805 }
2806
2807 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2808 /* ttl !=0 and nopmtudisc are incompatible */
2809 if (p.iph.ttl && p.iph.frag_off == 0)
2810 return -EINVAL;
2811
2812 strncpy(p.name, name, sizeof(p.name));
2813
2814 switch (p.iph.protocol) {
2815 case IPPROTO_IPIP:
2816 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2817 case IPPROTO_IPV6:
2818 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2819 default:
2820 break;
2821 }
2822 return -1;
2823 }
2824
2825 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2826 {
2827 struct blob_attr *cur;
2828 const char *str;
2829
2830 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2831 return -EINVAL;
2832 str = blobmsg_data(cur);
2833
2834 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2835 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2836 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2837 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2838 return system_link_del(name);
2839 else
2840 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2841 }
2842
2843 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2844 {
2845 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2846
2847 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2848 blob_data(attr), blob_len(attr));
2849
2850 return __system_del_ip_tunnel(name, tb);
2851 }
2852
2853 int system_update_ipv6_mtu(struct device *dev, int mtu)
2854 {
2855 int ret = -1;
2856 char buf[64];
2857 int fd;
2858
2859 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2860 dev->ifname);
2861
2862 fd = open(buf, O_RDWR);
2863 if (fd < 0)
2864 return ret;
2865
2866 if (!mtu) {
2867 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2868 if (len < 0)
2869 goto out;
2870
2871 buf[len] = 0;
2872 ret = atoi(buf);
2873 } else {
2874 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2875 ret = mtu;
2876 }
2877
2878 out:
2879 close(fd);
2880 return ret;
2881 }
2882
2883 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2884 {
2885 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2886 struct blob_attr *cur;
2887 const char *str;
2888
2889 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2890 blob_data(attr), blob_len(attr));
2891
2892 __system_del_ip_tunnel(name, tb);
2893
2894 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2895 return -EINVAL;
2896 str = blobmsg_data(cur);
2897
2898 unsigned int ttl = 0;
2899 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2900 ttl = blobmsg_get_u32(cur);
2901 if (ttl > 255)
2902 return -EINVAL;
2903 }
2904
2905 unsigned int link = 0;
2906 if ((cur = tb[TUNNEL_ATTR_LINK])) {
2907 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2908 if (!iface)
2909 return -EINVAL;
2910
2911 if (iface->l3_dev.dev)
2912 link = iface->l3_dev.dev->ifindex;
2913 }
2914
2915 if (!strcmp(str, "sit"))
2916 return system_add_sit_tunnel(name, link, tb);
2917 #ifdef IFLA_IPTUN_MAX
2918 else if (!strcmp(str, "ipip6")) {
2919 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2920 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2921 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2922 int ret = 0;
2923
2924 if (!nlm)
2925 return -1;
2926
2927 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2928 nla_put_string(nlm, IFLA_IFNAME, name);
2929
2930 if (link)
2931 nla_put_u32(nlm, IFLA_LINK, link);
2932
2933 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2934 if (!linkinfo) {
2935 ret = -ENOMEM;
2936 goto failure;
2937 }
2938 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2939 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2940 if (!infodata) {
2941 ret = -ENOMEM;
2942 goto failure;
2943 }
2944
2945 if (link)
2946 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2947
2948 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2949 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2950 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2951
2952 struct in6_addr in6buf;
2953 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2954 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2955 ret = -EINVAL;
2956 goto failure;
2957 }
2958 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2959 }
2960
2961 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2962 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2963 ret = -EINVAL;
2964 goto failure;
2965 }
2966 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2967 }
2968
2969 #ifdef IFLA_IPTUN_FMR_MAX
2970 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2971 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2972
2973 struct blob_attr *fmr;
2974 unsigned rem, fmrcnt = 0;
2975 blobmsg_for_each_attr(fmr, cur, rem) {
2976 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2977 continue;
2978
2979 unsigned ip4len, ip6len, ealen, offset = 6;
2980 char ip6buf[48];
2981 char ip4buf[16];
2982
2983 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2984 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2985 ret = -EINVAL;
2986 goto failure;
2987 }
2988
2989 struct in6_addr ip6prefix;
2990 struct in_addr ip4prefix;
2991 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2992 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2993 ret = -EINVAL;
2994 goto failure;
2995 }
2996
2997 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2998
2999 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3000 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3001 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3002 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3003 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3004 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3005
3006 nla_nest_end(nlm, rule);
3007 }
3008
3009 nla_nest_end(nlm, fmrs);
3010 }
3011 #endif
3012
3013 nla_nest_end(nlm, infodata);
3014 nla_nest_end(nlm, linkinfo);
3015
3016 return system_rtnl_call(nlm);
3017 failure:
3018 nlmsg_free(nlm);
3019 return ret;
3020 } else if (!strcmp(str, "greip")) {
3021 return system_add_gre_tunnel(name, "gre", link, tb, false);
3022 } else if (!strcmp(str, "gretapip")) {
3023 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3024 } else if (!strcmp(str, "greip6")) {
3025 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3026 } else if (!strcmp(str, "gretapip6")) {
3027 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3028 #ifdef IFLA_VTI_MAX
3029 } else if (!strcmp(str, "vtiip")) {
3030 return system_add_vti_tunnel(name, "vti", link, tb, false);
3031 } else if (!strcmp(str, "vtiip6")) {
3032 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3033 #endif
3034 #ifdef IFLA_VXLAN_MAX
3035 } else if(!strcmp(str, "vxlan")) {
3036 return system_add_vxlan(name, link, tb, false);
3037 } else if(!strcmp(str, "vxlan6")) {
3038 return system_add_vxlan(name, link, tb, true);
3039 #endif
3040 #endif
3041 } else if (!strcmp(str, "ipip")) {
3042 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3043 }
3044 else
3045 return -EINVAL;
3046
3047 return 0;
3048 }
OpenWrt Network interface configuration daemon