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system-linux: add VXLAN support
[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
85 static char dev_buf[256];
86
87 static void
88 handler_nl_event(struct uloop_fd *u, unsigned int events)
89 {
90 struct event_socket *ev = container_of(u, struct event_socket, uloop);
91 int err;
92 socklen_t errlen = sizeof(err);
93
94 if (!u->error) {
95 nl_recvmsgs_default(ev->sock);
96 return;
97 }
98
99 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
100 goto abort;
101
102 switch(err) {
103 case ENOBUFS:
104 // Increase rx buffer size on netlink socket
105 ev->bufsize *= 2;
106 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
107 goto abort;
108
109 // Request full dump since some info got dropped
110 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
111 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
112 break;
113
114 default:
115 goto abort;
116 }
117 u->error = false;
118 return;
119
120 abort:
121 uloop_fd_delete(&ev->uloop);
122 return;
123 }
124
125 static struct nl_sock *
126 create_socket(int protocol, int groups)
127 {
128 struct nl_sock *sock;
129
130 sock = nl_socket_alloc();
131 if (!sock)
132 return NULL;
133
134 if (groups)
135 nl_join_groups(sock, groups);
136
137 if (nl_connect(sock, protocol))
138 return NULL;
139
140 return sock;
141 }
142
143 static bool
144 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
145 uloop_fd_handler cb, int flags)
146 {
147 ev->sock = create_socket(protocol, groups);
148 if (!ev->sock)
149 return false;
150
151 ev->uloop.fd = nl_socket_get_fd(ev->sock);
152 ev->uloop.cb = cb;
153 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
154 return false;
155
156 return true;
157 }
158
159 static bool
160 create_event_socket(struct event_socket *ev, int protocol,
161 int (*cb)(struct nl_msg *msg, void *arg))
162 {
163 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
164 return false;
165
166 // Install the valid custom callback handler
167 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
168
169 // Disable sequence number checking on event sockets
170 nl_socket_disable_seq_check(ev->sock);
171
172 // Increase rx buffer size to 65K on event sockets
173 ev->bufsize = 65535;
174 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
175 return false;
176
177 return true;
178 }
179
180 static bool
181 system_rtn_aton(const char *src, unsigned int *dst)
182 {
183 char *e;
184 unsigned int n;
185
186 if (!strcmp(src, "local"))
187 n = RTN_LOCAL;
188 else if (!strcmp(src, "nat"))
189 n = RTN_NAT;
190 else if (!strcmp(src, "broadcast"))
191 n = RTN_BROADCAST;
192 else if (!strcmp(src, "anycast"))
193 n = RTN_ANYCAST;
194 else if (!strcmp(src, "multicast"))
195 n = RTN_MULTICAST;
196 else if (!strcmp(src, "prohibit"))
197 n = RTN_PROHIBIT;
198 else if (!strcmp(src, "unreachable"))
199 n = RTN_UNREACHABLE;
200 else if (!strcmp(src, "blackhole"))
201 n = RTN_BLACKHOLE;
202 else if (!strcmp(src, "xresolve"))
203 n = RTN_XRESOLVE;
204 else if (!strcmp(src, "unicast"))
205 n = RTN_UNICAST;
206 else if (!strcmp(src, "throw"))
207 n = RTN_THROW;
208 else if (!strcmp(src, "failed_policy"))
209 n = RTN_FAILED_POLICY;
210 else {
211 n = strtoul(src, &e, 0);
212 if (!e || *e || e == src || n > 255)
213 return false;
214 }
215
216 *dst = n;
217 return true;
218 }
219
220 static bool
221 system_tos_aton(const char *src, unsigned *dst)
222 {
223 char *e;
224
225 *dst = strtoul(src, &e, 16);
226 if (e == src || *e || *dst > 255)
227 return false;
228
229 return true;
230 }
231
232 int system_init(void)
233 {
234 static struct event_socket rtnl_event;
235 static struct event_socket hotplug_event;
236
237 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
238 system_fd_set_cloexec(sock_ioctl);
239
240 // Prepare socket for routing / address control
241 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
242 if (!sock_rtnl)
243 return -1;
244
245 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
246 return -1;
247
248 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
249 handle_hotplug_event, 0))
250 return -1;
251
252 // Receive network link events form kernel
253 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
254
255 return 0;
256 }
257
258 static void system_set_sysctl(const char *path, const char *val)
259 {
260 int fd;
261
262 fd = open(path, O_WRONLY);
263 if (fd < 0)
264 return;
265
266 if (write(fd, val, strlen(val))) {}
267 close(fd);
268 }
269
270 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
271 {
272 snprintf(dev_buf, sizeof(dev_buf), path, device);
273 system_set_sysctl(dev_buf, val);
274 }
275
276 static void system_set_disable_ipv6(struct device *dev, const char *val)
277 {
278 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
279 }
280
281 static void system_set_rpfilter(struct device *dev, const char *val)
282 {
283 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
284 }
285
286 static void system_set_acceptlocal(struct device *dev, const char *val)
287 {
288 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
289 }
290
291 static void system_set_igmpversion(struct device *dev, const char *val)
292 {
293 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
294 }
295
296 static void system_set_mldversion(struct device *dev, const char *val)
297 {
298 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
299 }
300
301 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
302 {
303 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
304 }
305
306 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
307 {
308 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
309 }
310
311 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
312 {
313 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
314 }
315
316 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
317 {
318 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
319 }
320
321 static void system_set_neigh4locktime(struct device *dev, const char *val)
322 {
323 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
324 }
325
326 static void system_set_dadtransmits(struct device *dev, const char *val)
327 {
328 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
329 }
330
331 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
332 {
333 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
334 }
335
336 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
337 {
338 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
339 }
340
341 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
342 {
343 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
344 }
345
346 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
347 {
348 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
349 "/sys/class/net/%s/brport/multicast_router",
350 dev->ifname, val);
351 }
352
353 static void system_bridge_set_robustness(struct device *dev, const char *val)
354 {
355 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
356 dev->ifname, val);
357 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
358 dev->ifname, val);
359 }
360
361 static void system_bridge_set_query_interval(struct device *dev, const char *val)
362 {
363 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
364 dev->ifname, val);
365 }
366
367 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
368 {
369 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
370 dev->ifname, val);
371 }
372
373 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
374 {
375 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
376 dev->ifname, val);
377 }
378
379 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
380 {
381 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
382 dev->ifname, val);
383 }
384
385 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
386 {
387 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
388 dev->ifname, val);
389 }
390
391 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
392 {
393 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
394 dev->ifname, val);
395 }
396
397 static void system_bridge_set_learning(struct device *dev, const char *val)
398 {
399 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
400 }
401
402 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
403 {
404 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
405 }
406
407 static void system_set_sendredirects(struct device *dev, const char *val)
408 {
409 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
410 }
411
412 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
413 {
414 int fd = -1, ret = -1;
415
416 fd = open(path, O_RDONLY);
417 if (fd < 0)
418 goto out;
419
420 ssize_t len = read(fd, buf, buf_sz - 1);
421 if (len < 0)
422 goto out;
423
424 ret = buf[len] = 0;
425
426 out:
427 if (fd >= 0)
428 close(fd);
429
430 return ret;
431 }
432
433 static int
434 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
435 {
436 snprintf(dev_buf, sizeof(dev_buf), path, device);
437 return system_get_sysctl(dev_buf, buf, buf_sz);
438 }
439
440 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
441 {
442 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
443 dev->ifname, buf, buf_sz);
444 }
445
446 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
447 {
448 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
449 dev->ifname, buf, buf_sz);
450 }
451
452 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
453 {
454 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
455 dev->ifname, buf, buf_sz);
456 }
457
458 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
459 {
460 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
461 dev->ifname, buf, buf_sz);
462 }
463
464 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
465 {
466 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
467 dev->ifname, buf, buf_sz);
468 }
469
470 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
471 {
472 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
473 dev->ifname, buf, buf_sz);
474 }
475
476 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
477 {
478 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
479 dev->ifname, buf, buf_sz);
480 }
481
482 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
483 {
484 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
485 dev->ifname, buf, buf_sz);
486 }
487
488 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
489 {
490 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
491 dev->ifname, buf, buf_sz);
492 }
493
494 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
495 {
496 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
497 dev->ifname, buf, buf_sz);
498 }
499
500 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
501 {
502 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
503 dev->ifname, buf, buf_sz);
504 }
505
506 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
507 {
508 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
509 dev->ifname, buf, buf_sz);
510 }
511
512 // Evaluate netlink messages
513 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
514 {
515 struct nlmsghdr *nh = nlmsg_hdr(msg);
516 struct nlattr *nla[__IFLA_MAX];
517 int link_state = 0;
518 char buf[10];
519
520 if (nh->nlmsg_type != RTM_NEWLINK)
521 goto out;
522
523 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
524 if (!nla[IFLA_IFNAME])
525 goto out;
526
527 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
528 if (!dev)
529 goto out;
530
531 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
532 link_state = strtoul(buf, NULL, 0);
533
534 device_set_link(dev, link_state ? true : false);
535
536 out:
537 return 0;
538 }
539
540 static void
541 handle_hotplug_msg(char *data, int size)
542 {
543 const char *subsystem = NULL, *interface = NULL;
544 char *cur, *end, *sep;
545 struct device *dev;
546 int skip;
547 bool add;
548
549 if (!strncmp(data, "add@", 4))
550 add = true;
551 else if (!strncmp(data, "remove@", 7))
552 add = false;
553 else
554 return;
555
556 skip = strlen(data) + 1;
557 end = data + size;
558
559 for (cur = data + skip; cur < end; cur += skip) {
560 skip = strlen(cur) + 1;
561
562 sep = strchr(cur, '=');
563 if (!sep)
564 continue;
565
566 *sep = 0;
567 if (!strcmp(cur, "INTERFACE"))
568 interface = sep + 1;
569 else if (!strcmp(cur, "SUBSYSTEM")) {
570 subsystem = sep + 1;
571 if (strcmp(subsystem, "net") != 0)
572 return;
573 }
574 if (subsystem && interface)
575 goto found;
576 }
577 return;
578
579 found:
580 dev = device_find(interface);
581 if (!dev)
582 return;
583
584 if (dev->type != &simple_device_type)
585 return;
586
587 if (add && system_if_force_external(dev->ifname))
588 return;
589
590 device_set_present(dev, add);
591 }
592
593 static void
594 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
595 {
596 struct event_socket *ev = container_of(u, struct event_socket, uloop);
597 struct sockaddr_nl nla;
598 unsigned char *buf = NULL;
599 int size;
600
601 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
602 if (nla.nl_pid == 0)
603 handle_hotplug_msg((char *) buf, size);
604
605 free(buf);
606 }
607 }
608
609 static int system_rtnl_call(struct nl_msg *msg)
610 {
611 int ret;
612
613 ret = nl_send_auto_complete(sock_rtnl, msg);
614 nlmsg_free(msg);
615
616 if (ret < 0)
617 return ret;
618
619 return nl_wait_for_ack(sock_rtnl);
620 }
621
622 int system_bridge_delbr(struct device *bridge)
623 {
624 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
625 }
626
627 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
628 {
629 struct ifreq ifr;
630
631 memset(&ifr, 0, sizeof(ifr));
632 if (dev)
633 ifr.ifr_ifindex = dev->ifindex;
634 else
635 ifr.ifr_data = data;
636 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
637 return ioctl(sock_ioctl, cmd, &ifr);
638 }
639
640 static bool system_is_bridge(const char *name, char *buf, int buflen)
641 {
642 struct stat st;
643
644 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
645 if (stat(buf, &st) < 0)
646 return false;
647
648 return true;
649 }
650
651 static char *system_get_bridge(const char *name, char *buf, int buflen)
652 {
653 char *path;
654 ssize_t len = -1;
655 glob_t gl;
656
657 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
658 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
659 return NULL;
660
661 if (gl.gl_pathc > 0)
662 len = readlink(gl.gl_pathv[0], buf, buflen);
663
664 globfree(&gl);
665
666 if (len < 0)
667 return NULL;
668
669 buf[len] = 0;
670 path = strrchr(buf, '/');
671 if (!path)
672 return NULL;
673
674 return path + 1;
675 }
676
677 static void
678 system_bridge_set_wireless(struct device *bridge, struct device *dev)
679 {
680 bool mcast_to_ucast = dev->wireless_ap;
681 bool hairpin = true;
682
683 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
684 !bridge->settings.multicast_to_unicast)
685 mcast_to_ucast = false;
686
687 if (!mcast_to_ucast || dev->wireless_isolate)
688 hairpin = false;
689
690 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
691 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
692 }
693
694 int system_bridge_addif(struct device *bridge, struct device *dev)
695 {
696 char buf[64];
697 char *oldbr;
698 int ret = 0;
699
700 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
701 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
702 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
703
704 if (dev->wireless)
705 system_bridge_set_wireless(bridge, dev);
706
707 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
708 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
709 system_bridge_set_multicast_router(dev, buf, false);
710 }
711
712 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
713 dev->settings.multicast_fast_leave)
714 system_bridge_set_multicast_fast_leave(dev, "1");
715
716 if (dev->settings.flags & DEV_OPT_LEARNING &&
717 !dev->settings.learning)
718 system_bridge_set_learning(dev, "0");
719
720 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
721 !dev->settings.unicast_flood)
722 system_bridge_set_unicast_flood(dev, "0");
723
724 return ret;
725 }
726
727 int system_bridge_delif(struct device *bridge, struct device *dev)
728 {
729 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
730 }
731
732 int system_if_resolve(struct device *dev)
733 {
734 struct ifreq ifr;
735 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
736 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
737 return ifr.ifr_ifindex;
738 else
739 return 0;
740 }
741
742 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
743 {
744 struct ifreq ifr;
745
746 memset(&ifr, 0, sizeof(ifr));
747 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
748 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
749 ifr.ifr_flags |= add;
750 ifr.ifr_flags &= ~rem;
751 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
752 }
753
754 struct clear_data {
755 struct nl_msg *msg;
756 struct device *dev;
757 int type;
758 int size;
759 int af;
760 };
761
762
763 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
764 {
765 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
766
767 return ifa->ifa_index == ifindex;
768 }
769
770 static bool check_route(struct nlmsghdr *hdr, int ifindex)
771 {
772 struct rtmsg *r = NLMSG_DATA(hdr);
773 struct nlattr *tb[__RTA_MAX];
774
775 if (r->rtm_protocol == RTPROT_KERNEL &&
776 r->rtm_family == AF_INET6)
777 return false;
778
779 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
780 if (!tb[RTA_OIF])
781 return false;
782
783 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
784 }
785
786 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
787 {
788 return true;
789 }
790
791 static int cb_clear_event(struct nl_msg *msg, void *arg)
792 {
793 struct clear_data *clr = arg;
794 struct nlmsghdr *hdr = nlmsg_hdr(msg);
795 bool (*cb)(struct nlmsghdr *, int ifindex);
796 int type;
797
798 switch(clr->type) {
799 case RTM_GETADDR:
800 type = RTM_DELADDR;
801 if (hdr->nlmsg_type != RTM_NEWADDR)
802 return NL_SKIP;
803
804 cb = check_ifaddr;
805 break;
806 case RTM_GETROUTE:
807 type = RTM_DELROUTE;
808 if (hdr->nlmsg_type != RTM_NEWROUTE)
809 return NL_SKIP;
810
811 cb = check_route;
812 break;
813 case RTM_GETRULE:
814 type = RTM_DELRULE;
815 if (hdr->nlmsg_type != RTM_NEWRULE)
816 return NL_SKIP;
817
818 cb = check_rule;
819 break;
820 default:
821 return NL_SKIP;
822 }
823
824 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
825 return NL_SKIP;
826
827 if (type == RTM_DELRULE)
828 D(SYSTEM, "Remove a rule\n");
829 else
830 D(SYSTEM, "Remove %s from device %s\n",
831 type == RTM_DELADDR ? "an address" : "a route",
832 clr->dev->ifname);
833 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
834 hdr = nlmsg_hdr(clr->msg);
835 hdr->nlmsg_type = type;
836 hdr->nlmsg_flags = NLM_F_REQUEST;
837
838 nl_socket_disable_auto_ack(sock_rtnl);
839 nl_send_auto_complete(sock_rtnl, clr->msg);
840 nl_socket_enable_auto_ack(sock_rtnl);
841
842 return NL_SKIP;
843 }
844
845 static int
846 cb_finish_event(struct nl_msg *msg, void *arg)
847 {
848 int *pending = arg;
849 *pending = 0;
850 return NL_STOP;
851 }
852
853 static int
854 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
855 {
856 int *pending = arg;
857 *pending = err->error;
858 return NL_STOP;
859 }
860
861 static void
862 system_if_clear_entries(struct device *dev, int type, int af)
863 {
864 struct clear_data clr;
865 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
866 struct rtmsg rtm = {
867 .rtm_family = af,
868 .rtm_flags = RTM_F_CLONED,
869 };
870 int flags = NLM_F_DUMP;
871 int pending = 1;
872
873 clr.af = af;
874 clr.dev = dev;
875 clr.type = type;
876 switch (type) {
877 case RTM_GETADDR:
878 case RTM_GETRULE:
879 clr.size = sizeof(struct rtgenmsg);
880 break;
881 case RTM_GETROUTE:
882 clr.size = sizeof(struct rtmsg);
883 break;
884 default:
885 return;
886 }
887
888 if (!cb)
889 return;
890
891 clr.msg = nlmsg_alloc_simple(type, flags);
892 if (!clr.msg)
893 goto out;
894
895 nlmsg_append(clr.msg, &rtm, clr.size, 0);
896 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
897 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
898 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
899
900 nl_send_auto_complete(sock_rtnl, clr.msg);
901 while (pending > 0)
902 nl_recvmsgs(sock_rtnl, cb);
903
904 nlmsg_free(clr.msg);
905 out:
906 nl_cb_put(cb);
907 }
908
909 /*
910 * Clear bridge (membership) state and bring down device
911 */
912 void system_if_clear_state(struct device *dev)
913 {
914 static char buf[256];
915 char *bridge;
916
917 device_set_ifindex(dev, system_if_resolve(dev));
918 if (dev->external || !dev->ifindex)
919 return;
920
921 system_if_flags(dev->ifname, 0, IFF_UP);
922
923 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
924 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
925 system_bridge_delbr(dev);
926 return;
927 }
928
929 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
930 if (bridge) {
931 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
932 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
933 }
934
935 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
936 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
937 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
938 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
939 system_set_disable_ipv6(dev, "0");
940 }
941
942 static inline unsigned long
943 sec_to_jiffies(int val)
944 {
945 return (unsigned long) val * 100;
946 }
947
948 static void system_bridge_conf_multicast_deps(struct device *bridge,
949 struct bridge_config *cfg,
950 char *buf,
951 int buf_len)
952 {
953 int val;
954
955 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
956 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
957 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
958 val = cfg->robustness * cfg->query_interval +
959 cfg->query_response_interval;
960
961 snprintf(buf, buf_len, "%i", val);
962 system_bridge_set_membership_interval(bridge, buf);
963
964 val = cfg->robustness * cfg->query_interval +
965 cfg->query_response_interval / 2;
966
967 snprintf(buf, buf_len, "%i", val);
968 system_bridge_set_other_querier_timeout(bridge, buf);
969 }
970
971 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
972 val = cfg->query_interval / 4;
973
974 snprintf(buf, buf_len, "%i", val);
975 system_bridge_set_startup_query_interval(bridge, buf);
976 }
977 }
978
979 static void system_bridge_conf_multicast(struct device *bridge,
980 struct bridge_config *cfg,
981 char *buf,
982 int buf_len)
983 {
984 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
985 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
986
987 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
988 bridge->ifname, cfg->multicast_querier ? "1" : "0");
989
990 snprintf(buf, buf_len, "%i", cfg->hash_max);
991 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
992 bridge->ifname, buf);
993
994 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
995 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
996 system_bridge_set_multicast_router(bridge, buf, true);
997 }
998
999 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1000 snprintf(buf, buf_len, "%i", cfg->robustness);
1001 system_bridge_set_robustness(bridge, buf);
1002 }
1003
1004 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1005 snprintf(buf, buf_len, "%i", cfg->query_interval);
1006 system_bridge_set_query_interval(bridge, buf);
1007 }
1008
1009 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1010 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1011 system_bridge_set_query_response_interval(bridge, buf);
1012 }
1013
1014 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1015 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1016 system_bridge_set_last_member_interval(bridge, buf);
1017 }
1018
1019 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1020 }
1021
1022 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1023 {
1024 char buf[64];
1025 unsigned long args[4] = {};
1026
1027 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1028 return -1;
1029
1030 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1031 args[1] = !!cfg->stp;
1032 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1033
1034 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1035 args[1] = sec_to_jiffies(cfg->forward_delay);
1036 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1037
1038 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1039
1040 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1041 args[1] = cfg->priority;
1042 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1043
1044 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1045 args[0] = BRCTL_SET_AGEING_TIME;
1046 args[1] = sec_to_jiffies(cfg->ageing_time);
1047 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1048 }
1049
1050 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1051 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1052 args[1] = sec_to_jiffies(cfg->hello_time);
1053 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1054 }
1055
1056 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1057 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1058 args[1] = sec_to_jiffies(cfg->max_age);
1059 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1060 }
1061
1062 return 0;
1063 }
1064
1065 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1066 {
1067 struct nl_msg *msg;
1068 struct nlattr *linkinfo, *data;
1069 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1070 int i, rv;
1071 static const struct {
1072 const char *name;
1073 enum macvlan_mode val;
1074 } modes[] = {
1075 { "private", MACVLAN_MODE_PRIVATE },
1076 { "vepa", MACVLAN_MODE_VEPA },
1077 { "bridge", MACVLAN_MODE_BRIDGE },
1078 { "passthru", MACVLAN_MODE_PASSTHRU },
1079 };
1080
1081 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1082
1083 if (!msg)
1084 return -1;
1085
1086 nlmsg_append(msg, &iim, sizeof(iim), 0);
1087
1088 if (cfg->flags & MACVLAN_OPT_MACADDR)
1089 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1090 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1091 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1092
1093 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1094 goto nla_put_failure;
1095
1096 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1097
1098 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1099 goto nla_put_failure;
1100
1101 if (cfg->mode) {
1102 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1103 if (strcmp(cfg->mode, modes[i].name) != 0)
1104 continue;
1105
1106 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1107 break;
1108 }
1109 }
1110
1111 nla_nest_end(msg, data);
1112 nla_nest_end(msg, linkinfo);
1113
1114 rv = system_rtnl_call(msg);
1115 if (rv)
1116 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1117
1118 return rv;
1119
1120 nla_put_failure:
1121 nlmsg_free(msg);
1122 return -ENOMEM;
1123 }
1124
1125 static int system_link_del(const char *ifname)
1126 {
1127 struct nl_msg *msg;
1128 struct ifinfomsg iim = {
1129 .ifi_family = AF_UNSPEC,
1130 .ifi_index = 0,
1131 };
1132
1133 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1134
1135 if (!msg)
1136 return -1;
1137
1138 nlmsg_append(msg, &iim, sizeof(iim), 0);
1139 nla_put_string(msg, IFLA_IFNAME, ifname);
1140 return system_rtnl_call(msg);
1141 }
1142
1143 int system_macvlan_del(struct device *macvlan)
1144 {
1145 return system_link_del(macvlan->ifname);
1146 }
1147
1148 int system_veth_add(struct device *veth, struct veth_config *cfg)
1149 {
1150 struct nl_msg *msg;
1151 struct ifinfomsg empty_iim = {};
1152 struct nlattr *linkinfo, *data, *veth_info;
1153 int rv;
1154
1155 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1156
1157 if (!msg)
1158 return -1;
1159
1160 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1161
1162 if (cfg->flags & VETH_OPT_MACADDR)
1163 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1164 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1165
1166 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1167 goto nla_put_failure;
1168
1169 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1170
1171 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1172 goto nla_put_failure;
1173
1174 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1175 goto nla_put_failure;
1176
1177 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1178
1179 if (cfg->flags & VETH_OPT_PEER_NAME)
1180 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1181 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1182 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1183
1184 nla_nest_end(msg, veth_info);
1185 nla_nest_end(msg, data);
1186 nla_nest_end(msg, linkinfo);
1187
1188 rv = system_rtnl_call(msg);
1189 if (rv) {
1190 if (cfg->flags & VETH_OPT_PEER_NAME)
1191 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1192 else
1193 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1194 }
1195
1196 return rv;
1197
1198 nla_put_failure:
1199 nlmsg_free(msg);
1200 return -ENOMEM;
1201 }
1202
1203 int system_veth_del(struct device *veth)
1204 {
1205 return system_link_del(veth->ifname);
1206 }
1207
1208 static int system_vlan(struct device *dev, int id)
1209 {
1210 struct vlan_ioctl_args ifr = {
1211 .cmd = SET_VLAN_NAME_TYPE_CMD,
1212 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1213 };
1214
1215 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1216
1217 if (id < 0) {
1218 ifr.cmd = DEL_VLAN_CMD;
1219 ifr.u.VID = 0;
1220 } else {
1221 ifr.cmd = ADD_VLAN_CMD;
1222 ifr.u.VID = id;
1223 }
1224 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1225 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1226 }
1227
1228 int system_vlan_add(struct device *dev, int id)
1229 {
1230 return system_vlan(dev, id);
1231 }
1232
1233 int system_vlan_del(struct device *dev)
1234 {
1235 return system_vlan(dev, -1);
1236 }
1237
1238 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1239 {
1240 struct nl_msg *msg;
1241 struct nlattr *linkinfo, *data;
1242 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1243 int rv;
1244
1245 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1246
1247 if (!msg)
1248 return -1;
1249
1250 nlmsg_append(msg, &iim, sizeof(iim), 0);
1251 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1252 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1253
1254 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1255 goto nla_put_failure;
1256
1257 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1258
1259 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1260 goto nla_put_failure;
1261
1262 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1263
1264 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1265 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1266 #else
1267 if(cfg->proto == VLAN_PROTO_8021AD)
1268 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);
1269 #endif
1270
1271 nla_nest_end(msg, data);
1272 nla_nest_end(msg, linkinfo);
1273
1274 rv = system_rtnl_call(msg);
1275 if (rv)
1276 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1277
1278 return rv;
1279
1280 nla_put_failure:
1281 nlmsg_free(msg);
1282 return -ENOMEM;
1283 }
1284
1285 int system_vlandev_del(struct device *vlandev)
1286 {
1287 return system_link_del(vlandev->ifname);
1288 }
1289
1290 void
1291 system_if_get_settings(struct device *dev, struct device_settings *s)
1292 {
1293 struct ifreq ifr;
1294 char buf[10];
1295
1296 memset(&ifr, 0, sizeof(ifr));
1297 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1298
1299 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1300 s->mtu = ifr.ifr_mtu;
1301 s->flags |= DEV_OPT_MTU;
1302 }
1303
1304 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1305 if (s->mtu6 > 0)
1306 s->flags |= DEV_OPT_MTU6;
1307
1308 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1309 s->txqueuelen = ifr.ifr_qlen;
1310 s->flags |= DEV_OPT_TXQUEUELEN;
1311 }
1312
1313 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1314 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1315 s->flags |= DEV_OPT_MACADDR;
1316 }
1317
1318 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1319 s->ipv6 = !strtoul(buf, NULL, 0);
1320 s->flags |= DEV_OPT_IPV6;
1321 }
1322
1323 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1324 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1325 s->flags |= DEV_OPT_PROMISC;
1326
1327 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1328 s->flags |= DEV_OPT_MULTICAST;
1329 }
1330
1331 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1332 s->rpfilter = strtoul(buf, NULL, 0);
1333 s->flags |= DEV_OPT_RPFILTER;
1334 }
1335
1336 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1337 s->acceptlocal = strtoul(buf, NULL, 0);
1338 s->flags |= DEV_OPT_ACCEPTLOCAL;
1339 }
1340
1341 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1342 s->igmpversion = strtoul(buf, NULL, 0);
1343 s->flags |= DEV_OPT_IGMPVERSION;
1344 }
1345
1346 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1347 s->mldversion = strtoul(buf, NULL, 0);
1348 s->flags |= DEV_OPT_MLDVERSION;
1349 }
1350
1351 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1352 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1353 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1354 }
1355
1356 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1357 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1358 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1359 }
1360
1361 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1362 s->neigh4locktime = strtoul(buf, NULL, 0);
1363 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1364 }
1365
1366 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1367 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1368 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1369 }
1370
1371 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1372 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1373 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1374 }
1375
1376 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1377 s->dadtransmits = strtoul(buf, NULL, 0);
1378 s->flags |= DEV_OPT_DADTRANSMITS;
1379 }
1380
1381 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1382 s->sendredirects = strtoul(buf, NULL, 0);
1383 s->flags |= DEV_OPT_SENDREDIRECTS;
1384 }
1385 }
1386
1387 static void
1388 system_if_set_rps_xps_val(const char *path, int val)
1389 {
1390 char val_buf[8];
1391 glob_t gl;
1392 int i;
1393
1394 if (glob(path, 0, NULL, &gl))
1395 return;
1396
1397 snprintf(val_buf, sizeof(val_buf), "%x", val);
1398 for (i = 0; i < gl.gl_pathc; i++)
1399 system_set_sysctl(gl.gl_pathv[i], val_buf);
1400
1401 globfree(&gl);
1402 }
1403
1404 static void
1405 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1406 {
1407 long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1408 int val;
1409
1410 if (n_cpus < 2)
1411 return;
1412
1413 val = (1 << n_cpus) - 1;
1414 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1415 system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1416
1417 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1418 system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1419 }
1420
1421 void
1422 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1423 {
1424 struct ifreq ifr;
1425 char buf[12];
1426
1427 memset(&ifr, 0, sizeof(ifr));
1428 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1429 if (s->flags & DEV_OPT_MTU & apply_mask) {
1430 ifr.ifr_mtu = s->mtu;
1431 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1432 s->flags &= ~DEV_OPT_MTU;
1433 }
1434 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1435 system_update_ipv6_mtu(dev, s->mtu6);
1436 }
1437 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1438 ifr.ifr_qlen = s->txqueuelen;
1439 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1440 s->flags &= ~DEV_OPT_TXQUEUELEN;
1441 }
1442 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1443 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1444 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1445 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1446 s->flags &= ~DEV_OPT_MACADDR;
1447 }
1448 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1449 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1450 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1451 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1452 !s->promisc ? IFF_PROMISC : 0) < 0)
1453 s->flags &= ~DEV_OPT_PROMISC;
1454 }
1455 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1456 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1457 system_set_rpfilter(dev, buf);
1458 }
1459 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1460 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1461 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1462 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1463 system_set_igmpversion(dev, buf);
1464 }
1465 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1466 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1467 system_set_mldversion(dev, buf);
1468 }
1469 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1470 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1471 system_set_neigh4reachabletime(dev, buf);
1472 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1473 system_set_neigh6reachabletime(dev, buf);
1474 }
1475 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1476 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1477 system_set_neigh4locktime(dev, buf);
1478 }
1479 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1480 snprintf(buf, sizeof(buf), "%d", s->neigh4gcstaletime);
1481 system_set_neigh4gcstaletime(dev, buf);
1482 snprintf(buf, sizeof(buf), "%d", s->neigh6gcstaletime);
1483 system_set_neigh6gcstaletime(dev, buf);
1484 }
1485 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1486 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1487 system_set_dadtransmits(dev, buf);
1488 }
1489 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1490 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1491 !s->multicast ? IFF_MULTICAST : 0) < 0)
1492 s->flags &= ~DEV_OPT_MULTICAST;
1493 }
1494 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1495 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1496
1497 system_if_apply_rps_xps(dev, s);
1498 }
1499
1500 int system_if_up(struct device *dev)
1501 {
1502 system_if_get_settings(dev, &dev->orig_settings);
1503 /* Only keep orig settings based on what needs to be set */
1504 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1505 dev->orig_settings.flags &= dev->settings.flags;
1506 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1507 return system_if_flags(dev->ifname, IFF_UP, 0);
1508 }
1509
1510 int system_if_down(struct device *dev)
1511 {
1512 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1513 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1514 return ret;
1515 }
1516
1517 struct if_check_data {
1518 struct device *dev;
1519 int pending;
1520 int ret;
1521 };
1522
1523 #ifndef IFF_LOWER_UP
1524 #define IFF_LOWER_UP 0x10000
1525 #endif
1526
1527 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1528 {
1529 struct nlmsghdr *nh = nlmsg_hdr(msg);
1530 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1531 struct if_check_data *chk = (struct if_check_data *)arg;
1532
1533 if (nh->nlmsg_type != RTM_NEWLINK)
1534 return NL_SKIP;
1535
1536 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1537 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1538
1539 return NL_OK;
1540 }
1541
1542 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1543 {
1544 struct if_check_data *chk = (struct if_check_data *)arg;
1545 chk->pending = 0;
1546 return NL_STOP;
1547 }
1548
1549 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1550 {
1551 struct if_check_data *chk = (struct if_check_data *)arg;
1552
1553 device_set_present(chk->dev, false);
1554 device_set_link(chk->dev, false);
1555 chk->pending = err->error;
1556
1557 return NL_STOP;
1558 }
1559
1560 int system_if_check(struct device *dev)
1561 {
1562 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1563 struct nl_msg *msg;
1564 struct ifinfomsg ifi = {
1565 .ifi_family = AF_UNSPEC,
1566 .ifi_index = 0,
1567 };
1568 struct if_check_data chk = {
1569 .dev = dev,
1570 .pending = 1,
1571 };
1572 int ret = 1;
1573
1574 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1575 if (!msg)
1576 goto out;
1577
1578 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1579 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1580 goto free;
1581
1582 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1583 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1584 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1585
1586 nl_send_auto_complete(sock_rtnl, msg);
1587 while (chk.pending > 0)
1588 nl_recvmsgs(sock_rtnl, cb);
1589
1590 ret = chk.pending;
1591
1592 free:
1593 nlmsg_free(msg);
1594 out:
1595 nl_cb_put(cb);
1596 return ret;
1597 }
1598
1599 struct device *
1600 system_if_get_parent(struct device *dev)
1601 {
1602 char buf[64], *devname;
1603 int ifindex, iflink, len;
1604 FILE *f;
1605
1606 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1607 f = fopen(buf, "r");
1608 if (!f)
1609 return NULL;
1610
1611 len = fread(buf, 1, sizeof(buf) - 1, f);
1612 fclose(f);
1613
1614 if (len <= 0)
1615 return NULL;
1616
1617 buf[len] = 0;
1618 iflink = strtoul(buf, NULL, 0);
1619 ifindex = system_if_resolve(dev);
1620 if (!iflink || iflink == ifindex)
1621 return NULL;
1622
1623 devname = if_indextoname(iflink, buf);
1624 if (!devname)
1625 return NULL;
1626
1627 return device_get(devname, true);
1628 }
1629
1630 static bool
1631 read_string_file(int dir_fd, const char *file, char *buf, int len)
1632 {
1633 bool ret = false;
1634 char *c;
1635 int fd;
1636
1637 fd = openat(dir_fd, file, O_RDONLY);
1638 if (fd < 0)
1639 return false;
1640
1641 retry:
1642 len = read(fd, buf, len - 1);
1643 if (len < 0) {
1644 if (errno == EINTR)
1645 goto retry;
1646 } else if (len > 0) {
1647 buf[len] = 0;
1648
1649 c = strchr(buf, '\n');
1650 if (c)
1651 *c = 0;
1652
1653 ret = true;
1654 }
1655
1656 close(fd);
1657
1658 return ret;
1659 }
1660
1661 static bool
1662 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1663 {
1664 char buf[64];
1665 bool ret = false;
1666
1667 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1668 if (ret)
1669 *val = strtoull(buf, NULL, 0);
1670
1671 return ret;
1672 }
1673
1674 /* Assume advertised flags == supported flags */
1675 static const struct {
1676 uint32_t mask;
1677 const char *name;
1678 } ethtool_link_modes[] = {
1679 { ADVERTISED_10baseT_Half, "10H" },
1680 { ADVERTISED_10baseT_Full, "10F" },
1681 { ADVERTISED_100baseT_Half, "100H" },
1682 { ADVERTISED_100baseT_Full, "100F" },
1683 { ADVERTISED_1000baseT_Half, "1000H" },
1684 { ADVERTISED_1000baseT_Full, "1000F" },
1685 };
1686
1687 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1688 {
1689 int i;
1690 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1691 if (mask & ethtool_link_modes[i].mask)
1692 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1693 }
1694 }
1695
1696 bool
1697 system_if_force_external(const char *ifname)
1698 {
1699 char buf[64];
1700 struct stat s;
1701
1702 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1703 return stat(buf, &s) == 0;
1704 }
1705
1706 int
1707 system_if_dump_info(struct device *dev, struct blob_buf *b)
1708 {
1709 struct ethtool_cmd ecmd;
1710 struct ifreq ifr;
1711 char buf[64], *s;
1712 void *c;
1713 int dir_fd;
1714
1715 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1716 dir_fd = open(buf, O_DIRECTORY);
1717
1718 memset(&ecmd, 0, sizeof(ecmd));
1719 memset(&ifr, 0, sizeof(ifr));
1720 strcpy(ifr.ifr_name, dev->ifname);
1721 ifr.ifr_data = (caddr_t) &ecmd;
1722 ecmd.cmd = ETHTOOL_GSET;
1723
1724 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1725 c = blobmsg_open_array(b, "link-advertising");
1726 system_add_link_modes(b, ecmd.advertising);
1727 blobmsg_close_array(b, c);
1728
1729 c = blobmsg_open_array(b, "link-supported");
1730 system_add_link_modes(b, ecmd.supported);
1731 blobmsg_close_array(b, c);
1732
1733 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1734 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1735 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1736 blobmsg_add_string_buffer(b);
1737 }
1738
1739 close(dir_fd);
1740 return 0;
1741 }
1742
1743 int
1744 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1745 {
1746 const char *const counters[] = {
1747 "collisions", "rx_frame_errors", "tx_compressed",
1748 "multicast", "rx_length_errors", "tx_dropped",
1749 "rx_bytes", "rx_missed_errors", "tx_errors",
1750 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1751 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1752 "rx_dropped", "tx_aborted_errors", "tx_packets",
1753 "rx_errors", "tx_bytes", "tx_window_errors",
1754 "rx_fifo_errors", "tx_carrier_errors",
1755 };
1756 char buf[64];
1757 int stats_dir;
1758 int i;
1759 uint64_t val = 0;
1760
1761 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1762 stats_dir = open(buf, O_DIRECTORY);
1763 if (stats_dir < 0)
1764 return -1;
1765
1766 for (i = 0; i < ARRAY_SIZE(counters); i++)
1767 if (read_uint64_file(stats_dir, counters[i], &val))
1768 blobmsg_add_u64(b, counters[i], val);
1769
1770 close(stats_dir);
1771 return 0;
1772 }
1773
1774 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1775 {
1776 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1777 int alen = v4 ? 4 : 16;
1778 unsigned int flags = 0;
1779 struct ifaddrmsg ifa = {
1780 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1781 .ifa_prefixlen = addr->mask,
1782 .ifa_index = dev->ifindex,
1783 };
1784
1785 struct nl_msg *msg;
1786 if (cmd == RTM_NEWADDR)
1787 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1788
1789 msg = nlmsg_alloc_simple(cmd, flags);
1790 if (!msg)
1791 return -1;
1792
1793 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1794 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1795 if (v4) {
1796 if (addr->broadcast)
1797 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1798 if (addr->point_to_point)
1799 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1800 } else {
1801 time_t now = system_get_rtime();
1802 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1803
1804 if (addr->preferred_until) {
1805 int64_t preferred = addr->preferred_until - now;
1806 if (preferred < 0)
1807 preferred = 0;
1808 else if (preferred > UINT32_MAX)
1809 preferred = UINT32_MAX;
1810
1811 cinfo.ifa_prefered = preferred;
1812 }
1813
1814 if (addr->valid_until) {
1815 int64_t valid = addr->valid_until - now;
1816 if (valid <= 0) {
1817 nlmsg_free(msg);
1818 return -1;
1819 }
1820 else if (valid > UINT32_MAX)
1821 valid = UINT32_MAX;
1822
1823 cinfo.ifa_valid = valid;
1824 }
1825
1826 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1827
1828 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1829 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1830 }
1831
1832 return system_rtnl_call(msg);
1833 }
1834
1835 int system_add_address(struct device *dev, struct device_addr *addr)
1836 {
1837 return system_addr(dev, addr, RTM_NEWADDR);
1838 }
1839
1840 int system_del_address(struct device *dev, struct device_addr *addr)
1841 {
1842 return system_addr(dev, addr, RTM_DELADDR);
1843 }
1844
1845 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1846 {
1847 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1848 bool have_gw;
1849 unsigned int flags = 0;
1850
1851 if (alen == 4)
1852 have_gw = !!route->nexthop.in.s_addr;
1853 else
1854 have_gw = route->nexthop.in6.s6_addr32[0] ||
1855 route->nexthop.in6.s6_addr32[1] ||
1856 route->nexthop.in6.s6_addr32[2] ||
1857 route->nexthop.in6.s6_addr32[3];
1858
1859 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1860 ? route->table : RT_TABLE_MAIN;
1861
1862 struct rtmsg rtm = {
1863 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1864 .rtm_dst_len = route->mask,
1865 .rtm_src_len = route->sourcemask,
1866 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1867 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1868 .rtm_scope = RT_SCOPE_NOWHERE,
1869 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1870 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1871 };
1872 struct nl_msg *msg;
1873
1874 if (cmd == RTM_NEWROUTE) {
1875 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1876
1877 if (!dev) { // Add null-route
1878 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1879 rtm.rtm_type = RTN_UNREACHABLE;
1880 }
1881 else
1882 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1883 }
1884
1885 if (route->flags & DEVROUTE_TYPE) {
1886 rtm.rtm_type = route->type;
1887 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1888 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1889 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1890 rtm.rtm_table = RT_TABLE_LOCAL;
1891 }
1892
1893 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1894 rtm.rtm_scope = RT_SCOPE_HOST;
1895 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1896 rtm.rtm_type == RTN_ANYCAST) {
1897 rtm.rtm_scope = RT_SCOPE_LINK;
1898 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1899 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1900 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1901 dev = NULL;
1902 }
1903 }
1904
1905 msg = nlmsg_alloc_simple(cmd, flags);
1906 if (!msg)
1907 return -1;
1908
1909 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1910
1911 if (route->mask)
1912 nla_put(msg, RTA_DST, alen, &route->addr);
1913
1914 if (route->sourcemask) {
1915 if (rtm.rtm_family == AF_INET)
1916 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1917 else
1918 nla_put(msg, RTA_SRC, alen, &route->source);
1919 }
1920
1921 if (route->metric > 0)
1922 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1923
1924 if (have_gw)
1925 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1926
1927 if (dev)
1928 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1929
1930 if (table >= 256)
1931 nla_put_u32(msg, RTA_TABLE, table);
1932
1933 if (route->flags & DEVROUTE_MTU) {
1934 struct nlattr *metrics;
1935
1936 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1937 goto nla_put_failure;
1938
1939 nla_put_u32(msg, RTAX_MTU, route->mtu);
1940
1941 nla_nest_end(msg, metrics);
1942 }
1943
1944 return system_rtnl_call(msg);
1945
1946 nla_put_failure:
1947 nlmsg_free(msg);
1948 return -ENOMEM;
1949 }
1950
1951 int system_add_route(struct device *dev, struct device_route *route)
1952 {
1953 return system_rt(dev, route, RTM_NEWROUTE);
1954 }
1955
1956 int system_del_route(struct device *dev, struct device_route *route)
1957 {
1958 return system_rt(dev, route, RTM_DELROUTE);
1959 }
1960
1961 int system_flush_routes(void)
1962 {
1963 const char *names[] = {
1964 "/proc/sys/net/ipv4/route/flush",
1965 "/proc/sys/net/ipv6/route/flush"
1966 };
1967 int fd, i;
1968
1969 for (i = 0; i < ARRAY_SIZE(names); i++) {
1970 fd = open(names[i], O_WRONLY);
1971 if (fd < 0)
1972 continue;
1973
1974 if (write(fd, "-1", 2)) {}
1975 close(fd);
1976 }
1977 return 0;
1978 }
1979
1980 bool system_resolve_rt_type(const char *type, unsigned int *id)
1981 {
1982 return system_rtn_aton(type, id);
1983 }
1984
1985 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1986 {
1987 FILE *f;
1988 char *e, buf[128];
1989 unsigned int n, proto = 256;
1990
1991 if ((n = strtoul(type, &e, 0)) >= 0 && !*e && e != type)
1992 proto = n;
1993 else if (!strcmp(type, "unspec"))
1994 proto = RTPROT_UNSPEC;
1995 else if (!strcmp(type, "kernel"))
1996 proto = RTPROT_KERNEL;
1997 else if (!strcmp(type, "boot"))
1998 proto = RTPROT_BOOT;
1999 else if (!strcmp(type, "static"))
2000 proto = RTPROT_STATIC;
2001 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2002 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2003 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2004 continue;
2005
2006 n = strtoul(e, NULL, 10);
2007 e = strtok(NULL, " \t\n");
2008
2009 if (e && !strcmp(e, type)) {
2010 proto = n;
2011 break;
2012 }
2013 }
2014 fclose(f);
2015 }
2016
2017 if (proto > 255)
2018 return false;
2019
2020 *id = proto;
2021 return true;
2022 }
2023
2024 bool system_resolve_rt_table(const char *name, unsigned int *id)
2025 {
2026 FILE *f;
2027 char *e, buf[128];
2028 unsigned int n, table = RT_TABLE_UNSPEC;
2029
2030 /* first try to parse table as number */
2031 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2032 table = n;
2033
2034 /* handle well known aliases */
2035 else if (!strcmp(name, "default"))
2036 table = RT_TABLE_DEFAULT;
2037 else if (!strcmp(name, "main"))
2038 table = RT_TABLE_MAIN;
2039 else if (!strcmp(name, "local"))
2040 table = RT_TABLE_LOCAL;
2041
2042 /* try to look up name in /etc/iproute2/rt_tables */
2043 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2044 {
2045 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2046 {
2047 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2048 continue;
2049
2050 n = strtoul(e, NULL, 10);
2051 e = strtok(NULL, " \t\n");
2052
2053 if (e && !strcmp(e, name))
2054 {
2055 table = n;
2056 break;
2057 }
2058 }
2059
2060 fclose(f);
2061 }
2062
2063 if (table == RT_TABLE_UNSPEC)
2064 return false;
2065
2066 *id = table;
2067 return true;
2068 }
2069
2070 bool system_is_default_rt_table(unsigned int id)
2071 {
2072 return (id == RT_TABLE_MAIN);
2073 }
2074
2075 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2076 {
2077 char *e;
2078 unsigned int n;
2079
2080 if (!strcmp(filter, "strict"))
2081 n = 1;
2082 else if (!strcmp(filter, "loose"))
2083 n = 2;
2084 else {
2085 n = strtoul(filter, &e, 0);
2086 if (*e || e == filter || n > 2)
2087 return false;
2088 }
2089
2090 *id = n;
2091 return true;
2092 }
2093
2094 static int system_iprule(struct iprule *rule, int cmd)
2095 {
2096 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2097
2098 struct nl_msg *msg;
2099 struct rtmsg rtm = {
2100 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2101 .rtm_protocol = RTPROT_STATIC,
2102 .rtm_scope = RT_SCOPE_UNIVERSE,
2103 .rtm_table = RT_TABLE_UNSPEC,
2104 .rtm_type = RTN_UNSPEC,
2105 .rtm_flags = 0,
2106 };
2107
2108 if (cmd == RTM_NEWRULE)
2109 rtm.rtm_type = RTN_UNICAST;
2110
2111 if (rule->invert)
2112 rtm.rtm_flags |= FIB_RULE_INVERT;
2113
2114 if (rule->flags & IPRULE_SRC)
2115 rtm.rtm_src_len = rule->src_mask;
2116
2117 if (rule->flags & IPRULE_DEST)
2118 rtm.rtm_dst_len = rule->dest_mask;
2119
2120 if (rule->flags & IPRULE_TOS)
2121 rtm.rtm_tos = rule->tos;
2122
2123 if (rule->flags & IPRULE_LOOKUP) {
2124 if (rule->lookup < 256)
2125 rtm.rtm_table = rule->lookup;
2126 }
2127
2128 if (rule->flags & IPRULE_ACTION)
2129 rtm.rtm_type = rule->action;
2130 else if (rule->flags & IPRULE_GOTO)
2131 rtm.rtm_type = FR_ACT_GOTO;
2132 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2133 rtm.rtm_type = FR_ACT_NOP;
2134
2135 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2136
2137 if (!msg)
2138 return -1;
2139
2140 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2141
2142 if (rule->flags & IPRULE_IN)
2143 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2144
2145 if (rule->flags & IPRULE_OUT)
2146 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2147
2148 if (rule->flags & IPRULE_SRC)
2149 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2150
2151 if (rule->flags & IPRULE_DEST)
2152 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2153
2154 if (rule->flags & IPRULE_PRIORITY)
2155 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2156 else if (cmd == RTM_NEWRULE)
2157 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2158
2159 if (rule->flags & IPRULE_FWMARK)
2160 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2161
2162 if (rule->flags & IPRULE_FWMASK)
2163 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2164
2165 if (rule->flags & IPRULE_LOOKUP) {
2166 if (rule->lookup >= 256)
2167 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2168 }
2169
2170 if (rule->flags & IPRULE_GOTO)
2171 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2172
2173 return system_rtnl_call(msg);
2174 }
2175
2176 int system_add_iprule(struct iprule *rule)
2177 {
2178 return system_iprule(rule, RTM_NEWRULE);
2179 }
2180
2181 int system_del_iprule(struct iprule *rule)
2182 {
2183 return system_iprule(rule, RTM_DELRULE);
2184 }
2185
2186 int system_flush_iprules(void)
2187 {
2188 int rv = 0;
2189 struct iprule rule;
2190
2191 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2192 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2193
2194 memset(&rule, 0, sizeof(rule));
2195
2196
2197 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2198
2199 rule.priority = 0;
2200 rule.lookup = RT_TABLE_LOCAL;
2201 rv |= system_iprule(&rule, RTM_NEWRULE);
2202
2203 rule.priority = 32766;
2204 rule.lookup = RT_TABLE_MAIN;
2205 rv |= system_iprule(&rule, RTM_NEWRULE);
2206
2207 rule.priority = 32767;
2208 rule.lookup = RT_TABLE_DEFAULT;
2209 rv |= system_iprule(&rule, RTM_NEWRULE);
2210
2211
2212 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2213
2214 rule.priority = 0;
2215 rule.lookup = RT_TABLE_LOCAL;
2216 rv |= system_iprule(&rule, RTM_NEWRULE);
2217
2218 rule.priority = 32766;
2219 rule.lookup = RT_TABLE_MAIN;
2220 rv |= system_iprule(&rule, RTM_NEWRULE);
2221
2222 return rv;
2223 }
2224
2225 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2226 {
2227 return system_rtn_aton(action, id);
2228 }
2229
2230 time_t system_get_rtime(void)
2231 {
2232 struct timespec ts;
2233 struct timeval tv;
2234
2235 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2236 return ts.tv_sec;
2237
2238 if (gettimeofday(&tv, NULL) == 0)
2239 return tv.tv_sec;
2240
2241 return 0;
2242 }
2243
2244 #ifndef IP_DF
2245 #define IP_DF 0x4000
2246 #endif
2247
2248 static int tunnel_ioctl(const char *name, int cmd, void *p)
2249 {
2250 struct ifreq ifr;
2251
2252 memset(&ifr, 0, sizeof(ifr));
2253 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2254 ifr.ifr_ifru.ifru_data = p;
2255 return ioctl(sock_ioctl, cmd, &ifr);
2256 }
2257
2258 #ifdef IFLA_IPTUN_MAX
2259 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2260 static int system_add_gre_tunnel(const char *name, const char *kind,
2261 const unsigned int link, struct blob_attr **tb, bool v6)
2262 {
2263 struct nl_msg *nlm;
2264 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2265 struct blob_attr *cur;
2266 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2267 uint16_t iflags = 0, oflags = 0;
2268 uint8_t tos = 0;
2269 int ret = 0, ttl = 0;
2270
2271 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2272 if (!nlm)
2273 return -1;
2274
2275 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2276 nla_put_string(nlm, IFLA_IFNAME, name);
2277
2278 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2279 if (!linkinfo) {
2280 ret = -ENOMEM;
2281 goto failure;
2282 }
2283
2284 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2285 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2286 if (!infodata) {
2287 ret = -ENOMEM;
2288 goto failure;
2289 }
2290
2291 if (link)
2292 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2293
2294 if ((cur = tb[TUNNEL_ATTR_TTL]))
2295 ttl = blobmsg_get_u32(cur);
2296
2297 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2298 char *str = blobmsg_get_string(cur);
2299 if (strcmp(str, "inherit")) {
2300 unsigned uval;
2301
2302 if (!system_tos_aton(str, &uval)) {
2303 ret = -EINVAL;
2304 goto failure;
2305 }
2306
2307 if (v6)
2308 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2309 else
2310 tos = uval;
2311 } else {
2312 if (v6)
2313 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2314 else
2315 tos = 1;
2316 }
2317 }
2318
2319 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2320 uint8_t icsum, ocsum, iseqno, oseqno;
2321 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2322 &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2323 ret = -EINVAL;
2324 goto failure;
2325 }
2326
2327 if (ikey)
2328 iflags |= GRE_KEY;
2329
2330 if (okey)
2331 oflags |= GRE_KEY;
2332
2333 if (icsum)
2334 iflags |= GRE_CSUM;
2335
2336 if (ocsum)
2337 oflags |= GRE_CSUM;
2338
2339 if (iseqno)
2340 iflags |= GRE_SEQ;
2341
2342 if (oseqno)
2343 oflags |= GRE_SEQ;
2344 }
2345
2346 if (v6) {
2347 struct in6_addr in6buf;
2348 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2349 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2350 ret = -EINVAL;
2351 goto failure;
2352 }
2353 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2354 }
2355
2356 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2357 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2358 ret = -EINVAL;
2359 goto failure;
2360 }
2361 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2362 }
2363 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2364
2365 if (flowinfo)
2366 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2367
2368 if (flags)
2369 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2370
2371 if (!ttl)
2372 ttl = 64;
2373 } else {
2374 struct in_addr inbuf;
2375 bool set_df = true;
2376
2377 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2378 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2379 ret = -EINVAL;
2380 goto failure;
2381 }
2382 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2383 }
2384
2385 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2386 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2387 ret = -EINVAL;
2388 goto failure;
2389 }
2390 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2391
2392 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2393 if (!okey) {
2394 okey = inbuf.s_addr;
2395 oflags |= GRE_KEY;
2396 }
2397
2398 if (!ikey) {
2399 ikey = inbuf.s_addr;
2400 iflags |= GRE_KEY;
2401 }
2402 }
2403 }
2404
2405 if ((cur = tb[TUNNEL_ATTR_DF]))
2406 set_df = blobmsg_get_bool(cur);
2407
2408 if (!set_df) {
2409 /* ttl != 0 and nopmtudisc are incompatible */
2410 if (ttl) {
2411 ret = -EINVAL;
2412 goto failure;
2413 }
2414 } else if (!ttl)
2415 ttl = 64;
2416
2417 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2418
2419 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2420 }
2421
2422 if (ttl)
2423 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2424
2425 if (oflags)
2426 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2427
2428 if (iflags)
2429 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2430
2431 if (okey)
2432 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2433
2434 if (ikey)
2435 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2436
2437 nla_nest_end(nlm, infodata);
2438 nla_nest_end(nlm, linkinfo);
2439
2440 return system_rtnl_call(nlm);
2441
2442 failure:
2443 nlmsg_free(nlm);
2444 return ret;
2445 }
2446 #endif
2447
2448 #ifdef IFLA_VTI_MAX
2449 static int system_add_vti_tunnel(const char *name, const char *kind,
2450 const unsigned int link, struct blob_attr **tb, bool v6)
2451 {
2452 struct nl_msg *nlm;
2453 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2454 struct blob_attr *cur;
2455 uint32_t ikey = 0, okey = 0;
2456 int ret = 0;
2457
2458 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2459 if (!nlm)
2460 return -1;
2461
2462 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2463 nla_put_string(nlm, IFLA_IFNAME, name);
2464
2465 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2466 if (!linkinfo) {
2467 ret = -ENOMEM;
2468 goto failure;
2469 }
2470
2471 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2472 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2473 if (!infodata) {
2474 ret = -ENOMEM;
2475 goto failure;
2476 }
2477
2478 if (link)
2479 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2480
2481 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2482 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2483 &ikey, &okey) < 2) {
2484 ret = -EINVAL;
2485 goto failure;
2486 }
2487 }
2488
2489 if (v6) {
2490 struct in6_addr in6buf;
2491 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2492 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2493 ret = -EINVAL;
2494 goto failure;
2495 }
2496 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2497 }
2498
2499 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2500 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2501 ret = -EINVAL;
2502 goto failure;
2503 }
2504 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2505 }
2506
2507 } else {
2508 struct in_addr inbuf;
2509
2510 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2511 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2512 ret = -EINVAL;
2513 goto failure;
2514 }
2515 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2516 }
2517
2518 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2519 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2520 ret = -EINVAL;
2521 goto failure;
2522 }
2523 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2524 }
2525
2526 }
2527
2528 if (okey)
2529 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2530
2531 if (ikey)
2532 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2533
2534 nla_nest_end(nlm, infodata);
2535 nla_nest_end(nlm, linkinfo);
2536
2537 return system_rtnl_call(nlm);
2538
2539 failure:
2540 nlmsg_free(nlm);
2541 return ret;
2542 }
2543 #endif
2544
2545 #ifdef IFLA_VXLAN_MAX
2546 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2547 {
2548 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2549 struct nl_msg *msg;
2550 struct nlattr *linkinfo, *data;
2551 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2552 struct blob_attr *cur;
2553 int ret = 0;
2554
2555 if ((cur = tb[TUNNEL_ATTR_DATA]))
2556 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2557 blobmsg_data(cur), blobmsg_len(cur));
2558 else
2559 return -EINVAL;
2560
2561 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2562
2563 if (!msg)
2564 return -1;
2565
2566 nlmsg_append(msg, &iim, sizeof(iim), 0);
2567
2568 nla_put_string(msg, IFLA_IFNAME, name);
2569
2570 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2571 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2572 if (!ea) {
2573 ret = -EINVAL;
2574 goto failure;
2575 }
2576
2577 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2578 }
2579
2580 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2581 uint32_t mtu = blobmsg_get_u32(cur);
2582 nla_put_u32(msg, IFLA_MTU, mtu);
2583 }
2584
2585 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2586 ret = -ENOMEM;
2587 goto failure;
2588 }
2589
2590 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2591
2592 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2593 ret = -ENOMEM;
2594 goto failure;
2595 }
2596
2597 if (link)
2598 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2599
2600 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2601 uint32_t id = blobmsg_get_u32(cur);
2602 if (id >= (1u << 24) - 1) {
2603 ret = -EINVAL;
2604 goto failure;
2605 }
2606
2607 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2608 }
2609
2610 if (v6) {
2611 struct in6_addr in6buf;
2612 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2613 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2614 ret = -EINVAL;
2615 goto failure;
2616 }
2617 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2618 }
2619
2620 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2621 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2622 ret = -EINVAL;
2623 goto failure;
2624 }
2625 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2626 }
2627 } else {
2628 struct in_addr inbuf;
2629
2630 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2631 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2632 ret = -EINVAL;
2633 goto failure;
2634 }
2635 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2636 }
2637
2638 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2639 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2640 ret = -EINVAL;
2641 goto failure;
2642 }
2643 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2644 }
2645 }
2646
2647 uint32_t port = 4789;
2648 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2649 port = blobmsg_get_u32(cur);
2650 if (port < 1 || port > 65535) {
2651 ret = -EINVAL;
2652 goto failure;
2653 }
2654 }
2655 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2656
2657 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2658 char *str = blobmsg_get_string(cur);
2659 unsigned tos = 1;
2660
2661 if (strcmp(str, "inherit")) {
2662 if (!system_tos_aton(str, &tos))
2663 return -EINVAL;
2664 }
2665
2666 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2667 }
2668
2669 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2670 uint32_t ttl = blobmsg_get_u32(cur);
2671 if (ttl < 1 || ttl > 255) {
2672 ret = -EINVAL;
2673 goto failure;
2674 }
2675
2676 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2677 }
2678
2679 nla_nest_end(msg, data);
2680 nla_nest_end(msg, linkinfo);
2681
2682 ret = system_rtnl_call(msg);
2683 if (ret)
2684 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2685
2686 return ret;
2687
2688 failure:
2689 nlmsg_free(msg);
2690 return ret;
2691 }
2692 #endif
2693
2694 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2695 {
2696 struct blob_attr *cur;
2697 bool set_df = true;
2698 struct ip_tunnel_parm p = {
2699 .link = link,
2700 .iph = {
2701 .version = 4,
2702 .ihl = 5,
2703 .protocol = proto,
2704 }
2705 };
2706
2707 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2708 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2709 return -EINVAL;
2710
2711 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2712 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2713 return -EINVAL;
2714
2715 if ((cur = tb[TUNNEL_ATTR_DF]))
2716 set_df = blobmsg_get_bool(cur);
2717
2718 if ((cur = tb[TUNNEL_ATTR_TTL]))
2719 p.iph.ttl = blobmsg_get_u32(cur);
2720
2721 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2722 char *str = blobmsg_get_string(cur);
2723 if (strcmp(str, "inherit")) {
2724 unsigned uval;
2725
2726 if (!system_tos_aton(str, &uval))
2727 return -EINVAL;
2728
2729 p.iph.tos = uval;
2730 } else
2731 p.iph.tos = 1;
2732 }
2733
2734 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2735 /* ttl !=0 and nopmtudisc are incompatible */
2736 if (p.iph.ttl && p.iph.frag_off == 0)
2737 return -EINVAL;
2738
2739 strncpy(p.name, name, sizeof(p.name));
2740
2741 switch (p.iph.protocol) {
2742 case IPPROTO_IPIP:
2743 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2744 case IPPROTO_IPV6:
2745 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2746 default:
2747 break;
2748 }
2749 return -1;
2750 }
2751
2752 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2753 {
2754 struct blob_attr *cur;
2755 const char *str;
2756
2757 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2758 return -EINVAL;
2759 str = blobmsg_data(cur);
2760
2761 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2762 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2763 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
2764 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
2765 return system_link_del(name);
2766 else
2767 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2768 }
2769
2770 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2771 {
2772 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2773
2774 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2775 blob_data(attr), blob_len(attr));
2776
2777 return __system_del_ip_tunnel(name, tb);
2778 }
2779
2780 int system_update_ipv6_mtu(struct device *dev, int mtu)
2781 {
2782 int ret = -1;
2783 char buf[64];
2784 int fd;
2785
2786 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2787 dev->ifname);
2788
2789 fd = open(buf, O_RDWR);
2790 if (fd < 0)
2791 return ret;
2792
2793 if (!mtu) {
2794 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2795 if (len < 0)
2796 goto out;
2797
2798 buf[len] = 0;
2799 ret = atoi(buf);
2800 } else {
2801 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2802 ret = mtu;
2803 }
2804
2805 out:
2806 close(fd);
2807 return ret;
2808 }
2809
2810 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2811 {
2812 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2813 struct blob_attr *cur;
2814 const char *str;
2815
2816 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2817 blob_data(attr), blob_len(attr));
2818
2819 __system_del_ip_tunnel(name, tb);
2820
2821 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2822 return -EINVAL;
2823 str = blobmsg_data(cur);
2824
2825 unsigned int ttl = 0;
2826 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2827 ttl = blobmsg_get_u32(cur);
2828 if (ttl > 255)
2829 return -EINVAL;
2830 }
2831
2832 unsigned int link = 0;
2833 if ((cur = tb[TUNNEL_ATTR_LINK])) {
2834 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2835 if (!iface)
2836 return -EINVAL;
2837
2838 if (iface->l3_dev.dev)
2839 link = iface->l3_dev.dev->ifindex;
2840 }
2841
2842 if (!strcmp(str, "sit")) {
2843 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2844 return -1;
2845
2846 #ifdef SIOCADD6RD
2847 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2848 unsigned int mask;
2849 struct ip_tunnel_6rd p6;
2850
2851 memset(&p6, 0, sizeof(p6));
2852
2853 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2854 &p6.prefix, &mask) || mask > 128)
2855 return -EINVAL;
2856 p6.prefixlen = mask;
2857
2858 if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2859 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2860 &p6.relay_prefix, &mask) || mask > 32)
2861 return -EINVAL;
2862 p6.relay_prefixlen = mask;
2863 }
2864
2865 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2866 __system_del_ip_tunnel(name, tb);
2867 return -1;
2868 }
2869 }
2870 #endif
2871 #ifdef IFLA_IPTUN_MAX
2872 } else if (!strcmp(str, "ipip6")) {
2873 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2874 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2875 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2876 int ret = 0;
2877
2878 if (!nlm)
2879 return -1;
2880
2881 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2882 nla_put_string(nlm, IFLA_IFNAME, name);
2883
2884 if (link)
2885 nla_put_u32(nlm, IFLA_LINK, link);
2886
2887 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2888 if (!linkinfo) {
2889 ret = -ENOMEM;
2890 goto failure;
2891 }
2892 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2893 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2894 if (!infodata) {
2895 ret = -ENOMEM;
2896 goto failure;
2897 }
2898
2899 if (link)
2900 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2901
2902 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2903 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2904 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2905
2906 struct in6_addr in6buf;
2907 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2908 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2909 ret = -EINVAL;
2910 goto failure;
2911 }
2912 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2913 }
2914
2915 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2916 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2917 ret = -EINVAL;
2918 goto failure;
2919 }
2920 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2921 }
2922
2923 #ifdef IFLA_IPTUN_FMR_MAX
2924 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2925 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2926
2927 struct blob_attr *fmr;
2928 unsigned rem, fmrcnt = 0;
2929 blobmsg_for_each_attr(fmr, cur, rem) {
2930 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2931 continue;
2932
2933 unsigned ip4len, ip6len, ealen, offset = 6;
2934 char ip6buf[48];
2935 char ip4buf[16];
2936
2937 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2938 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2939 ret = -EINVAL;
2940 goto failure;
2941 }
2942
2943 struct in6_addr ip6prefix;
2944 struct in_addr ip4prefix;
2945 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2946 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2947 ret = -EINVAL;
2948 goto failure;
2949 }
2950
2951 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2952
2953 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2954 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2955 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2956 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2957 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2958 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2959
2960 nla_nest_end(nlm, rule);
2961 }
2962
2963 nla_nest_end(nlm, fmrs);
2964 }
2965 #endif
2966
2967 nla_nest_end(nlm, infodata);
2968 nla_nest_end(nlm, linkinfo);
2969
2970 return system_rtnl_call(nlm);
2971 failure:
2972 nlmsg_free(nlm);
2973 return ret;
2974 } else if (!strcmp(str, "greip")) {
2975 return system_add_gre_tunnel(name, "gre", link, tb, false);
2976 } else if (!strcmp(str, "gretapip")) {
2977 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2978 } else if (!strcmp(str, "greip6")) {
2979 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2980 } else if (!strcmp(str, "gretapip6")) {
2981 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2982 #ifdef IFLA_VTI_MAX
2983 } else if (!strcmp(str, "vtiip")) {
2984 return system_add_vti_tunnel(name, "vti", link, tb, false);
2985 } else if (!strcmp(str, "vtiip6")) {
2986 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2987 #endif
2988 #ifdef IFLA_VXLAN_MAX
2989 } else if(!strcmp(str, "vxlan")) {
2990 return system_add_vxlan(name, link, tb, false);
2991 } else if(!strcmp(str, "vxlan6")) {
2992 return system_add_vxlan(name, link, tb, true);
2993 #endif
2994 #endif
2995 } else if (!strcmp(str, "ipip")) {
2996 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2997 }
2998 else
2999 return -EINVAL;
3000
3001 return 0;
3002 }
OpenWrt Network interface configuration daemon