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device: add veth 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 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17 #define _GNU_SOURCE
18
19 #include <sys/socket.h>
20 #include <sys/ioctl.h>
21 #include <sys/stat.h>
22 #include <sys/syscall.h>
23
24 #include <net/if.h>
25 #include <net/if_arp.h>
26
27 #include <arpa/inet.h>
28 #include <netinet/in.h>
29
30 #include <linux/rtnetlink.h>
31 #include <linux/sockios.h>
32 #include <linux/ip.h>
33 #include <linux/if_addr.h>
34 #include <linux/if_link.h>
35 #include <linux/if_vlan.h>
36 #include <linux/if_bridge.h>
37 #include <linux/if_tunnel.h>
38 #include <linux/ip6_tunnel.h>
39 #include <linux/ethtool.h>
40 #include <linux/fib_rules.h>
41 #include <linux/veth.h>
42 #include <linux/version.h>
43
44 #ifndef RTN_FAILED_POLICY
45 #define RTN_FAILED_POLICY 12
46 #endif
47
48 #ifndef IFA_F_NOPREFIXROUTE
49 #define IFA_F_NOPREFIXROUTE 0x200
50 #endif
51
52 #ifndef IFA_FLAGS
53 #define IFA_FLAGS (IFA_MULTICAST + 1)
54 #endif
55
56 #include <string.h>
57 #include <fcntl.h>
58 #include <glob.h>
59 #include <time.h>
60 #include <unistd.h>
61
62 #include <netlink/msg.h>
63 #include <netlink/attr.h>
64 #include <netlink/socket.h>
65 #include <libubox/uloop.h>
66
67 #include "netifd.h"
68 #include "device.h"
69 #include "system.h"
70
71 struct event_socket {
72 struct uloop_fd uloop;
73 struct nl_sock *sock;
74 int bufsize;
75 };
76
77 static int sock_ioctl = -1;
78 static struct nl_sock *sock_rtnl = NULL;
79
80 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
81 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
82
83 static char dev_buf[256];
84
85 static void
86 handler_nl_event(struct uloop_fd *u, unsigned int events)
87 {
88 struct event_socket *ev = container_of(u, struct event_socket, uloop);
89 int err;
90 socklen_t errlen = sizeof(err);
91
92 if (!u->error) {
93 nl_recvmsgs_default(ev->sock);
94 return;
95 }
96
97 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
98 goto abort;
99
100 switch(err) {
101 case ENOBUFS:
102 // Increase rx buffer size on netlink socket
103 ev->bufsize *= 2;
104 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
105 goto abort;
106
107 // Request full dump since some info got dropped
108 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
109 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
110 break;
111
112 default:
113 goto abort;
114 }
115 u->error = false;
116 return;
117
118 abort:
119 uloop_fd_delete(&ev->uloop);
120 return;
121 }
122
123 static struct nl_sock *
124 create_socket(int protocol, int groups)
125 {
126 struct nl_sock *sock;
127
128 sock = nl_socket_alloc();
129 if (!sock)
130 return NULL;
131
132 if (groups)
133 nl_join_groups(sock, groups);
134
135 if (nl_connect(sock, protocol))
136 return NULL;
137
138 return sock;
139 }
140
141 static bool
142 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
143 uloop_fd_handler cb, int flags)
144 {
145 ev->sock = create_socket(protocol, groups);
146 if (!ev->sock)
147 return false;
148
149 ev->uloop.fd = nl_socket_get_fd(ev->sock);
150 ev->uloop.cb = cb;
151 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
152 return false;
153
154 return true;
155 }
156
157 static bool
158 create_event_socket(struct event_socket *ev, int protocol,
159 int (*cb)(struct nl_msg *msg, void *arg))
160 {
161 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
162 return false;
163
164 // Install the valid custom callback handler
165 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
166
167 // Disable sequence number checking on event sockets
168 nl_socket_disable_seq_check(ev->sock);
169
170 // Increase rx buffer size to 65K on event sockets
171 ev->bufsize = 65535;
172 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
173 return false;
174
175 return true;
176 }
177
178 static bool
179 system_rtn_aton(const char *src, unsigned int *dst)
180 {
181 char *e;
182 unsigned int n;
183
184 if (!strcmp(src, "local"))
185 n = RTN_LOCAL;
186 else if (!strcmp(src, "nat"))
187 n = RTN_NAT;
188 else if (!strcmp(src, "broadcast"))
189 n = RTN_BROADCAST;
190 else if (!strcmp(src, "anycast"))
191 n = RTN_ANYCAST;
192 else if (!strcmp(src, "multicast"))
193 n = RTN_MULTICAST;
194 else if (!strcmp(src, "prohibit"))
195 n = RTN_PROHIBIT;
196 else if (!strcmp(src, "unreachable"))
197 n = RTN_UNREACHABLE;
198 else if (!strcmp(src, "blackhole"))
199 n = RTN_BLACKHOLE;
200 else if (!strcmp(src, "xresolve"))
201 n = RTN_XRESOLVE;
202 else if (!strcmp(src, "unicast"))
203 n = RTN_UNICAST;
204 else if (!strcmp(src, "throw"))
205 n = RTN_THROW;
206 else if (!strcmp(src, "failed_policy"))
207 n = RTN_FAILED_POLICY;
208 else {
209 n = strtoul(src, &e, 0);
210 if (!e || *e || e == src || n > 255)
211 return false;
212 }
213
214 *dst = n;
215 return true;
216 }
217
218 static bool
219 system_tos_aton(const char *src, unsigned *dst)
220 {
221 char *e;
222
223 *dst = strtoul(src, &e, 16);
224 if (e == src || *e || *dst > 255)
225 return false;
226
227 return true;
228 }
229
230 int system_init(void)
231 {
232 static struct event_socket rtnl_event;
233 static struct event_socket hotplug_event;
234
235 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
236 system_fd_set_cloexec(sock_ioctl);
237
238 // Prepare socket for routing / address control
239 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
240 if (!sock_rtnl)
241 return -1;
242
243 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
244 return -1;
245
246 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
247 handle_hotplug_event, 0))
248 return -1;
249
250 // Receive network link events form kernel
251 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
252
253 return 0;
254 }
255
256 static void system_set_sysctl(const char *path, const char *val)
257 {
258 int fd;
259
260 fd = open(path, O_WRONLY);
261 if (fd < 0)
262 return;
263
264 if (write(fd, val, strlen(val))) {}
265 close(fd);
266 }
267
268 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
269 {
270 snprintf(dev_buf, sizeof(dev_buf), path, device);
271 system_set_sysctl(dev_buf, val);
272 }
273
274 static void system_set_disable_ipv6(struct device *dev, const char *val)
275 {
276 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
277 }
278
279 static void system_set_rpfilter(struct device *dev, const char *val)
280 {
281 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
282 }
283
284 static void system_set_acceptlocal(struct device *dev, const char *val)
285 {
286 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
287 }
288
289 static void system_set_igmpversion(struct device *dev, const char *val)
290 {
291 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
292 }
293
294 static void system_set_mldversion(struct device *dev, const char *val)
295 {
296 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
297 }
298
299 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
300 {
301 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
302 }
303
304 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
305 {
306 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
307 }
308
309 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
310 {
311 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
312 }
313
314 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
315 {
316 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
317 }
318
319 static void system_set_dadtransmits(struct device *dev, const char *val)
320 {
321 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
322 }
323
324 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
325 {
326 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
327 }
328
329 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
330 {
331 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
332 }
333
334 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
335 {
336 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
337 }
338
339 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
340 {
341 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
342 "/sys/class/net/%s/brport/multicast_router",
343 dev->ifname, val);
344 }
345
346 static void system_bridge_set_robustness(struct device *dev, const char *val)
347 {
348 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
349 dev->ifname, val);
350 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
351 dev->ifname, val);
352 }
353
354 static void system_bridge_set_query_interval(struct device *dev, const char *val)
355 {
356 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
357 dev->ifname, val);
358 }
359
360 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
361 {
362 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
363 dev->ifname, val);
364 }
365
366 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
367 {
368 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
369 dev->ifname, val);
370 }
371
372 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
373 {
374 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
375 dev->ifname, val);
376 }
377
378 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
379 {
380 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
381 dev->ifname, val);
382 }
383
384 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
385 {
386 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
387 dev->ifname, val);
388 }
389
390 static void system_bridge_set_learning(struct device *dev, const char *val)
391 {
392 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
393 }
394
395 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
396 {
397 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
398 }
399
400 static void system_set_sendredirects(struct device *dev, const char *val)
401 {
402 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
403 }
404
405 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
406 {
407 int fd = -1, ret = -1;
408
409 fd = open(path, O_RDONLY);
410 if (fd < 0)
411 goto out;
412
413 ssize_t len = read(fd, buf, buf_sz - 1);
414 if (len < 0)
415 goto out;
416
417 ret = buf[len] = 0;
418
419 out:
420 if (fd >= 0)
421 close(fd);
422
423 return ret;
424 }
425
426 static int
427 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
428 {
429 snprintf(dev_buf, sizeof(dev_buf), path, device);
430 return system_get_sysctl(dev_buf, buf, buf_sz);
431 }
432
433 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
434 {
435 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
436 dev->ifname, buf, buf_sz);
437 }
438
439 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
440 {
441 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
442 dev->ifname, buf, buf_sz);
443 }
444
445 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
446 {
447 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
448 dev->ifname, buf, buf_sz);
449 }
450
451 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
452 {
453 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
454 dev->ifname, buf, buf_sz);
455 }
456
457 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
458 {
459 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
460 dev->ifname, buf, buf_sz);
461 }
462
463 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
464 {
465 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
466 dev->ifname, buf, buf_sz);
467 }
468
469 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
470 {
471 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
472 dev->ifname, buf, buf_sz);
473 }
474
475 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
476 {
477 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
478 dev->ifname, buf, buf_sz);
479 }
480
481 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
482 {
483 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
484 dev->ifname, buf, buf_sz);
485 }
486
487 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
488 {
489 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
490 dev->ifname, buf, buf_sz);
491 }
492
493 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
494 {
495 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
496 dev->ifname, buf, buf_sz);
497 }
498
499 // Evaluate netlink messages
500 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
501 {
502 struct nlmsghdr *nh = nlmsg_hdr(msg);
503 struct nlattr *nla[__IFLA_MAX];
504 int link_state = 0;
505 char buf[10];
506
507 if (nh->nlmsg_type != RTM_NEWLINK)
508 goto out;
509
510 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
511 if (!nla[IFLA_IFNAME])
512 goto out;
513
514 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
515 if (!dev)
516 goto out;
517
518 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
519 link_state = strtoul(buf, NULL, 0);
520
521 device_set_link(dev, link_state ? true : false);
522
523 out:
524 return 0;
525 }
526
527 static void
528 handle_hotplug_msg(char *data, int size)
529 {
530 const char *subsystem = NULL, *interface = NULL;
531 char *cur, *end, *sep;
532 struct device *dev;
533 int skip;
534 bool add;
535
536 if (!strncmp(data, "add@", 4))
537 add = true;
538 else if (!strncmp(data, "remove@", 7))
539 add = false;
540 else
541 return;
542
543 skip = strlen(data) + 1;
544 end = data + size;
545
546 for (cur = data + skip; cur < end; cur += skip) {
547 skip = strlen(cur) + 1;
548
549 sep = strchr(cur, '=');
550 if (!sep)
551 continue;
552
553 *sep = 0;
554 if (!strcmp(cur, "INTERFACE"))
555 interface = sep + 1;
556 else if (!strcmp(cur, "SUBSYSTEM")) {
557 subsystem = sep + 1;
558 if (strcmp(subsystem, "net") != 0)
559 return;
560 }
561 if (subsystem && interface)
562 goto found;
563 }
564 return;
565
566 found:
567 dev = device_find(interface);
568 if (!dev)
569 return;
570
571 if (dev->type != &simple_device_type)
572 return;
573
574 if (add && system_if_force_external(dev->ifname))
575 return;
576
577 device_set_present(dev, add);
578 }
579
580 static void
581 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
582 {
583 struct event_socket *ev = container_of(u, struct event_socket, uloop);
584 struct sockaddr_nl nla;
585 unsigned char *buf = NULL;
586 int size;
587
588 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
589 if (nla.nl_pid == 0)
590 handle_hotplug_msg((char *) buf, size);
591
592 free(buf);
593 }
594 }
595
596 static int system_rtnl_call(struct nl_msg *msg)
597 {
598 int ret;
599
600 ret = nl_send_auto_complete(sock_rtnl, msg);
601 nlmsg_free(msg);
602
603 if (ret < 0)
604 return ret;
605
606 return nl_wait_for_ack(sock_rtnl);
607 }
608
609 int system_bridge_delbr(struct device *bridge)
610 {
611 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
612 }
613
614 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
615 {
616 struct ifreq ifr;
617
618 memset(&ifr, 0, sizeof(ifr));
619 if (dev)
620 ifr.ifr_ifindex = dev->ifindex;
621 else
622 ifr.ifr_data = data;
623 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
624 return ioctl(sock_ioctl, cmd, &ifr);
625 }
626
627 static bool system_is_bridge(const char *name, char *buf, int buflen)
628 {
629 struct stat st;
630
631 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
632 if (stat(buf, &st) < 0)
633 return false;
634
635 return true;
636 }
637
638 static char *system_get_bridge(const char *name, char *buf, int buflen)
639 {
640 char *path;
641 ssize_t len = -1;
642 glob_t gl;
643
644 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
645 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
646 return NULL;
647
648 if (gl.gl_pathc > 0)
649 len = readlink(gl.gl_pathv[0], buf, buflen);
650
651 globfree(&gl);
652
653 if (len < 0)
654 return NULL;
655
656 buf[len] = 0;
657 path = strrchr(buf, '/');
658 if (!path)
659 return NULL;
660
661 return path + 1;
662 }
663
664 static void
665 system_bridge_set_wireless(struct device *bridge, struct device *dev)
666 {
667 bool mcast_to_ucast = dev->wireless_ap;
668 bool hairpin = true;
669
670 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
671 !bridge->settings.multicast_to_unicast)
672 mcast_to_ucast = false;
673
674 if (!mcast_to_ucast || dev->wireless_isolate)
675 hairpin = false;
676
677 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
678 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
679 }
680
681 int system_bridge_addif(struct device *bridge, struct device *dev)
682 {
683 char buf[64];
684 char *oldbr;
685 int ret = 0;
686
687 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
688 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
689 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
690
691 if (dev->wireless)
692 system_bridge_set_wireless(bridge, dev);
693
694 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
695 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
696 system_bridge_set_multicast_router(dev, buf, false);
697 }
698
699 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
700 dev->settings.multicast_fast_leave)
701 system_bridge_set_multicast_fast_leave(dev, "1");
702
703 if (dev->settings.flags & DEV_OPT_LEARNING &&
704 !dev->settings.learning)
705 system_bridge_set_learning(dev, "0");
706
707 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
708 !dev->settings.unicast_flood)
709 system_bridge_set_unicast_flood(dev, "0");
710
711 return ret;
712 }
713
714 int system_bridge_delif(struct device *bridge, struct device *dev)
715 {
716 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
717 }
718
719 int system_if_resolve(struct device *dev)
720 {
721 struct ifreq ifr;
722 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
723 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
724 return ifr.ifr_ifindex;
725 else
726 return 0;
727 }
728
729 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
730 {
731 struct ifreq ifr;
732
733 memset(&ifr, 0, sizeof(ifr));
734 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
735 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
736 ifr.ifr_flags |= add;
737 ifr.ifr_flags &= ~rem;
738 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
739 }
740
741 struct clear_data {
742 struct nl_msg *msg;
743 struct device *dev;
744 int type;
745 int size;
746 int af;
747 };
748
749
750 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
751 {
752 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
753
754 return ifa->ifa_index == ifindex;
755 }
756
757 static bool check_route(struct nlmsghdr *hdr, int ifindex)
758 {
759 struct rtmsg *r = NLMSG_DATA(hdr);
760 struct nlattr *tb[__RTA_MAX];
761
762 if (r->rtm_protocol == RTPROT_KERNEL &&
763 r->rtm_family == AF_INET6)
764 return false;
765
766 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
767 if (!tb[RTA_OIF])
768 return false;
769
770 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
771 }
772
773 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
774 {
775 return true;
776 }
777
778 static int cb_clear_event(struct nl_msg *msg, void *arg)
779 {
780 struct clear_data *clr = arg;
781 struct nlmsghdr *hdr = nlmsg_hdr(msg);
782 bool (*cb)(struct nlmsghdr *, int ifindex);
783 int type;
784
785 switch(clr->type) {
786 case RTM_GETADDR:
787 type = RTM_DELADDR;
788 if (hdr->nlmsg_type != RTM_NEWADDR)
789 return NL_SKIP;
790
791 cb = check_ifaddr;
792 break;
793 case RTM_GETROUTE:
794 type = RTM_DELROUTE;
795 if (hdr->nlmsg_type != RTM_NEWROUTE)
796 return NL_SKIP;
797
798 cb = check_route;
799 break;
800 case RTM_GETRULE:
801 type = RTM_DELRULE;
802 if (hdr->nlmsg_type != RTM_NEWRULE)
803 return NL_SKIP;
804
805 cb = check_rule;
806 break;
807 default:
808 return NL_SKIP;
809 }
810
811 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
812 return NL_SKIP;
813
814 if (type == RTM_DELRULE)
815 D(SYSTEM, "Remove a rule\n");
816 else
817 D(SYSTEM, "Remove %s from device %s\n",
818 type == RTM_DELADDR ? "an address" : "a route",
819 clr->dev->ifname);
820 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
821 hdr = nlmsg_hdr(clr->msg);
822 hdr->nlmsg_type = type;
823 hdr->nlmsg_flags = NLM_F_REQUEST;
824
825 nl_socket_disable_auto_ack(sock_rtnl);
826 nl_send_auto_complete(sock_rtnl, clr->msg);
827 nl_socket_enable_auto_ack(sock_rtnl);
828
829 return NL_SKIP;
830 }
831
832 static int
833 cb_finish_event(struct nl_msg *msg, void *arg)
834 {
835 int *pending = arg;
836 *pending = 0;
837 return NL_STOP;
838 }
839
840 static int
841 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
842 {
843 int *pending = arg;
844 *pending = err->error;
845 return NL_STOP;
846 }
847
848 static void
849 system_if_clear_entries(struct device *dev, int type, int af)
850 {
851 struct clear_data clr;
852 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
853 struct rtmsg rtm = {
854 .rtm_family = af,
855 .rtm_flags = RTM_F_CLONED,
856 };
857 int flags = NLM_F_DUMP;
858 int pending = 1;
859
860 clr.af = af;
861 clr.dev = dev;
862 clr.type = type;
863 switch (type) {
864 case RTM_GETADDR:
865 case RTM_GETRULE:
866 clr.size = sizeof(struct rtgenmsg);
867 break;
868 case RTM_GETROUTE:
869 clr.size = sizeof(struct rtmsg);
870 break;
871 default:
872 return;
873 }
874
875 if (!cb)
876 return;
877
878 clr.msg = nlmsg_alloc_simple(type, flags);
879 if (!clr.msg)
880 goto out;
881
882 nlmsg_append(clr.msg, &rtm, clr.size, 0);
883 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
884 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
885 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
886
887 nl_send_auto_complete(sock_rtnl, clr.msg);
888 while (pending > 0)
889 nl_recvmsgs(sock_rtnl, cb);
890
891 nlmsg_free(clr.msg);
892 out:
893 nl_cb_put(cb);
894 }
895
896 /*
897 * Clear bridge (membership) state and bring down device
898 */
899 void system_if_clear_state(struct device *dev)
900 {
901 static char buf[256];
902 char *bridge;
903
904 device_set_ifindex(dev, system_if_resolve(dev));
905 if (dev->external || !dev->ifindex)
906 return;
907
908 system_if_flags(dev->ifname, 0, IFF_UP);
909
910 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
911 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
912 system_bridge_delbr(dev);
913 return;
914 }
915
916 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
917 if (bridge) {
918 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
919 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
920 }
921
922 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
923 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
924 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
925 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
926 system_set_disable_ipv6(dev, "0");
927 }
928
929 static inline unsigned long
930 sec_to_jiffies(int val)
931 {
932 return (unsigned long) val * 100;
933 }
934
935 static void system_bridge_conf_multicast_deps(struct device *bridge,
936 struct bridge_config *cfg,
937 char *buf,
938 int buf_len)
939 {
940 int val;
941
942 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
943 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
944 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
945 val = cfg->robustness * cfg->query_interval +
946 cfg->query_response_interval;
947
948 snprintf(buf, buf_len, "%i", val);
949 system_bridge_set_membership_interval(bridge, buf);
950
951 val = cfg->robustness * cfg->query_interval +
952 cfg->query_response_interval / 2;
953
954 snprintf(buf, buf_len, "%i", val);
955 system_bridge_set_other_querier_timeout(bridge, buf);
956 }
957
958 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
959 val = cfg->query_interval / 4;
960
961 snprintf(buf, buf_len, "%i", val);
962 system_bridge_set_startup_query_interval(bridge, buf);
963 }
964 }
965
966 static void system_bridge_conf_multicast(struct device *bridge,
967 struct bridge_config *cfg,
968 char *buf,
969 int buf_len)
970 {
971 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
972 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
973
974 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
975 bridge->ifname, cfg->multicast_querier ? "1" : "0");
976
977 snprintf(buf, buf_len, "%i", cfg->hash_max);
978 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
979 bridge->ifname, buf);
980
981 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
982 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
983 system_bridge_set_multicast_router(bridge, buf, true);
984 }
985
986 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
987 snprintf(buf, buf_len, "%i", cfg->robustness);
988 system_bridge_set_robustness(bridge, buf);
989 }
990
991 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
992 snprintf(buf, buf_len, "%i", cfg->query_interval);
993 system_bridge_set_query_interval(bridge, buf);
994 }
995
996 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
997 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
998 system_bridge_set_query_response_interval(bridge, buf);
999 }
1000
1001 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1002 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1003 system_bridge_set_last_member_interval(bridge, buf);
1004 }
1005
1006 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1007 }
1008
1009 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1010 {
1011 char buf[64];
1012 unsigned long args[4] = {};
1013
1014 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1015 return -1;
1016
1017 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1018 args[1] = !!cfg->stp;
1019 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1020
1021 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1022 args[1] = sec_to_jiffies(cfg->forward_delay);
1023 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1024
1025 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1026
1027 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1028 args[1] = cfg->priority;
1029 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1030
1031 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1032 args[0] = BRCTL_SET_AGEING_TIME;
1033 args[1] = sec_to_jiffies(cfg->ageing_time);
1034 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1035 }
1036
1037 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1038 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1039 args[1] = sec_to_jiffies(cfg->hello_time);
1040 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1041 }
1042
1043 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1044 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1045 args[1] = sec_to_jiffies(cfg->max_age);
1046 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1047 }
1048
1049 return 0;
1050 }
1051
1052 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1053 {
1054 struct nl_msg *msg;
1055 struct nlattr *linkinfo, *data;
1056 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1057 int i, rv;
1058 static const struct {
1059 const char *name;
1060 enum macvlan_mode val;
1061 } modes[] = {
1062 { "private", MACVLAN_MODE_PRIVATE },
1063 { "vepa", MACVLAN_MODE_VEPA },
1064 { "bridge", MACVLAN_MODE_BRIDGE },
1065 { "passthru", MACVLAN_MODE_PASSTHRU },
1066 };
1067
1068 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1069
1070 if (!msg)
1071 return -1;
1072
1073 nlmsg_append(msg, &iim, sizeof(iim), 0);
1074
1075 if (cfg->flags & MACVLAN_OPT_MACADDR)
1076 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1077 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1078 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1079
1080 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1081 goto nla_put_failure;
1082
1083 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1084
1085 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1086 goto nla_put_failure;
1087
1088 if (cfg->mode) {
1089 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1090 if (strcmp(cfg->mode, modes[i].name) != 0)
1091 continue;
1092
1093 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1094 break;
1095 }
1096 }
1097
1098 nla_nest_end(msg, data);
1099 nla_nest_end(msg, linkinfo);
1100
1101 rv = system_rtnl_call(msg);
1102 if (rv)
1103 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1104
1105 return rv;
1106
1107 nla_put_failure:
1108 nlmsg_free(msg);
1109 return -ENOMEM;
1110 }
1111
1112 static int system_link_del(const char *ifname)
1113 {
1114 struct nl_msg *msg;
1115 struct ifinfomsg iim = {
1116 .ifi_family = AF_UNSPEC,
1117 .ifi_index = 0,
1118 };
1119
1120 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1121
1122 if (!msg)
1123 return -1;
1124
1125 nlmsg_append(msg, &iim, sizeof(iim), 0);
1126 nla_put_string(msg, IFLA_IFNAME, ifname);
1127 return system_rtnl_call(msg);
1128 }
1129
1130 int system_macvlan_del(struct device *macvlan)
1131 {
1132 return system_link_del(macvlan->ifname);
1133 }
1134
1135 int system_veth_add(struct device *veth, struct veth_config *cfg)
1136 {
1137 struct nl_msg *msg;
1138 struct ifinfomsg empty_iim = {};
1139 struct nlattr *linkinfo, *data, *veth_info;
1140 int rv;
1141
1142 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1143
1144 if (!msg)
1145 return -1;
1146
1147 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1148
1149 if (cfg->flags & VETH_OPT_MACADDR)
1150 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1151 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1152
1153 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1154 goto nla_put_failure;
1155
1156 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1157
1158 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1159 goto nla_put_failure;
1160
1161 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1162 goto nla_put_failure;
1163
1164 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1165
1166 if (cfg->flags & VETH_OPT_PEER_NAME)
1167 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1168 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1169 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1170
1171 nla_nest_end(msg, veth_info);
1172 nla_nest_end(msg, data);
1173 nla_nest_end(msg, linkinfo);
1174
1175 rv = system_rtnl_call(msg);
1176 if (rv) {
1177 if (cfg->flags & VETH_OPT_PEER_NAME)
1178 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1179 else
1180 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1181 }
1182
1183 return rv;
1184
1185 nla_put_failure:
1186 nlmsg_free(msg);
1187 return -ENOMEM;
1188 }
1189
1190 int system_veth_del(struct device *veth)
1191 {
1192 return system_link_del(veth->ifname);
1193 }
1194
1195 static int system_vlan(struct device *dev, int id)
1196 {
1197 struct vlan_ioctl_args ifr = {
1198 .cmd = SET_VLAN_NAME_TYPE_CMD,
1199 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1200 };
1201
1202 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1203
1204 if (id < 0) {
1205 ifr.cmd = DEL_VLAN_CMD;
1206 ifr.u.VID = 0;
1207 } else {
1208 ifr.cmd = ADD_VLAN_CMD;
1209 ifr.u.VID = id;
1210 }
1211 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1212 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1213 }
1214
1215 int system_vlan_add(struct device *dev, int id)
1216 {
1217 return system_vlan(dev, id);
1218 }
1219
1220 int system_vlan_del(struct device *dev)
1221 {
1222 return system_vlan(dev, -1);
1223 }
1224
1225 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1226 {
1227 struct nl_msg *msg;
1228 struct nlattr *linkinfo, *data;
1229 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1230 int rv;
1231
1232 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1233
1234 if (!msg)
1235 return -1;
1236
1237 nlmsg_append(msg, &iim, sizeof(iim), 0);
1238 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1239 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1240
1241 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1242 goto nla_put_failure;
1243
1244 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1245
1246 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1247 goto nla_put_failure;
1248
1249 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1250
1251 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1252 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1253 #else
1254 if(cfg->proto == VLAN_PROTO_8021AD)
1255 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);
1256 #endif
1257
1258 nla_nest_end(msg, data);
1259 nla_nest_end(msg, linkinfo);
1260
1261 rv = system_rtnl_call(msg);
1262 if (rv)
1263 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1264
1265 return rv;
1266
1267 nla_put_failure:
1268 nlmsg_free(msg);
1269 return -ENOMEM;
1270 }
1271
1272 int system_vlandev_del(struct device *vlandev)
1273 {
1274 return system_link_del(vlandev->ifname);
1275 }
1276
1277 void
1278 system_if_get_settings(struct device *dev, struct device_settings *s)
1279 {
1280 struct ifreq ifr;
1281 char buf[10];
1282
1283 memset(&ifr, 0, sizeof(ifr));
1284 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1285
1286 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1287 s->mtu = ifr.ifr_mtu;
1288 s->flags |= DEV_OPT_MTU;
1289 }
1290
1291 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1292 if (s->mtu6 > 0)
1293 s->flags |= DEV_OPT_MTU6;
1294
1295 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1296 s->txqueuelen = ifr.ifr_qlen;
1297 s->flags |= DEV_OPT_TXQUEUELEN;
1298 }
1299
1300 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1301 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1302 s->flags |= DEV_OPT_MACADDR;
1303 }
1304
1305 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1306 s->ipv6 = !strtoul(buf, NULL, 0);
1307 s->flags |= DEV_OPT_IPV6;
1308 }
1309
1310 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1311 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1312 s->flags |= DEV_OPT_PROMISC;
1313
1314 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1315 s->flags |= DEV_OPT_MULTICAST;
1316 }
1317
1318 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1319 s->rpfilter = strtoul(buf, NULL, 0);
1320 s->flags |= DEV_OPT_RPFILTER;
1321 }
1322
1323 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1324 s->acceptlocal = strtoul(buf, NULL, 0);
1325 s->flags |= DEV_OPT_ACCEPTLOCAL;
1326 }
1327
1328 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1329 s->igmpversion = strtoul(buf, NULL, 0);
1330 s->flags |= DEV_OPT_IGMPVERSION;
1331 }
1332
1333 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1334 s->mldversion = strtoul(buf, NULL, 0);
1335 s->flags |= DEV_OPT_MLDVERSION;
1336 }
1337
1338 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1339 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1340 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1341 }
1342
1343 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1344 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1345 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1346 }
1347
1348 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1349 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1350 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1351 }
1352
1353 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1354 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1355 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1356 }
1357
1358 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1359 s->dadtransmits = strtoul(buf, NULL, 0);
1360 s->flags |= DEV_OPT_DADTRANSMITS;
1361 }
1362
1363 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1364 s->sendredirects = strtoul(buf, NULL, 0);
1365 s->flags |= DEV_OPT_SENDREDIRECTS;
1366 }
1367 }
1368
1369 static void
1370 system_if_set_rps_xps_val(const char *path, int val)
1371 {
1372 char val_buf[8];
1373 glob_t gl;
1374 int i;
1375
1376 if (glob(path, 0, NULL, &gl))
1377 return;
1378
1379 snprintf(val_buf, sizeof(val_buf), "%x", val);
1380 for (i = 0; i < gl.gl_pathc; i++)
1381 system_set_sysctl(gl.gl_pathv[i], val_buf);
1382
1383 globfree(&gl);
1384 }
1385
1386 static void
1387 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1388 {
1389 long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1390 int val;
1391
1392 if (n_cpus < 2)
1393 return;
1394
1395 val = (1 << n_cpus) - 1;
1396 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1397 system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1398
1399 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1400 system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1401 }
1402
1403 void
1404 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1405 {
1406 struct ifreq ifr;
1407 char buf[12];
1408
1409 memset(&ifr, 0, sizeof(ifr));
1410 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1411 if (s->flags & DEV_OPT_MTU & apply_mask) {
1412 ifr.ifr_mtu = s->mtu;
1413 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1414 s->flags &= ~DEV_OPT_MTU;
1415 }
1416 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1417 system_update_ipv6_mtu(dev, s->mtu6);
1418 }
1419 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1420 ifr.ifr_qlen = s->txqueuelen;
1421 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1422 s->flags &= ~DEV_OPT_TXQUEUELEN;
1423 }
1424 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1425 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1426 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1427 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1428 s->flags &= ~DEV_OPT_MACADDR;
1429 }
1430 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1431 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1432 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1433 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1434 !s->promisc ? IFF_PROMISC : 0) < 0)
1435 s->flags &= ~DEV_OPT_PROMISC;
1436 }
1437 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1438 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1439 system_set_rpfilter(dev, buf);
1440 }
1441 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1442 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1443 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1444 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1445 system_set_igmpversion(dev, buf);
1446 }
1447 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1448 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1449 system_set_mldversion(dev, buf);
1450 }
1451 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1452 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1453 system_set_neigh4reachabletime(dev, buf);
1454 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1455 system_set_neigh6reachabletime(dev, buf);
1456 }
1457 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1458 snprintf(buf, sizeof(buf), "%d", s->neigh4gcstaletime);
1459 system_set_neigh4gcstaletime(dev, buf);
1460 snprintf(buf, sizeof(buf), "%d", s->neigh6gcstaletime);
1461 system_set_neigh6gcstaletime(dev, buf);
1462 }
1463 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1464 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1465 system_set_dadtransmits(dev, buf);
1466 }
1467 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1468 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1469 !s->multicast ? IFF_MULTICAST : 0) < 0)
1470 s->flags &= ~DEV_OPT_MULTICAST;
1471 }
1472 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1473 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1474
1475 system_if_apply_rps_xps(dev, s);
1476 }
1477
1478 int system_if_up(struct device *dev)
1479 {
1480 system_if_get_settings(dev, &dev->orig_settings);
1481 /* Only keep orig settings based on what needs to be set */
1482 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1483 dev->orig_settings.flags &= dev->settings.flags;
1484 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1485 return system_if_flags(dev->ifname, IFF_UP, 0);
1486 }
1487
1488 int system_if_down(struct device *dev)
1489 {
1490 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1491 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1492 return ret;
1493 }
1494
1495 struct if_check_data {
1496 struct device *dev;
1497 int pending;
1498 int ret;
1499 };
1500
1501 #ifndef IFF_LOWER_UP
1502 #define IFF_LOWER_UP 0x10000
1503 #endif
1504
1505 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1506 {
1507 struct nlmsghdr *nh = nlmsg_hdr(msg);
1508 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1509 struct if_check_data *chk = (struct if_check_data *)arg;
1510
1511 if (nh->nlmsg_type != RTM_NEWLINK)
1512 return NL_SKIP;
1513
1514 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1515 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1516
1517 return NL_OK;
1518 }
1519
1520 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1521 {
1522 struct if_check_data *chk = (struct if_check_data *)arg;
1523 chk->pending = 0;
1524 return NL_STOP;
1525 }
1526
1527 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1528 {
1529 struct if_check_data *chk = (struct if_check_data *)arg;
1530
1531 device_set_present(chk->dev, false);
1532 device_set_link(chk->dev, false);
1533 chk->pending = err->error;
1534
1535 return NL_STOP;
1536 }
1537
1538 int system_if_check(struct device *dev)
1539 {
1540 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1541 struct nl_msg *msg;
1542 struct ifinfomsg ifi = {
1543 .ifi_family = AF_UNSPEC,
1544 .ifi_index = 0,
1545 };
1546 struct if_check_data chk = {
1547 .dev = dev,
1548 .pending = 1,
1549 };
1550 int ret = 1;
1551
1552 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1553 if (!msg)
1554 goto out;
1555
1556 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1557 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1558 goto free;
1559
1560 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1561 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1562 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1563
1564 nl_send_auto_complete(sock_rtnl, msg);
1565 while (chk.pending > 0)
1566 nl_recvmsgs(sock_rtnl, cb);
1567
1568 ret = chk.pending;
1569
1570 free:
1571 nlmsg_free(msg);
1572 out:
1573 nl_cb_put(cb);
1574 return ret;
1575 }
1576
1577 struct device *
1578 system_if_get_parent(struct device *dev)
1579 {
1580 char buf[64], *devname;
1581 int ifindex, iflink, len;
1582 FILE *f;
1583
1584 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1585 f = fopen(buf, "r");
1586 if (!f)
1587 return NULL;
1588
1589 len = fread(buf, 1, sizeof(buf) - 1, f);
1590 fclose(f);
1591
1592 if (len <= 0)
1593 return NULL;
1594
1595 buf[len] = 0;
1596 iflink = strtoul(buf, NULL, 0);
1597 ifindex = system_if_resolve(dev);
1598 if (!iflink || iflink == ifindex)
1599 return NULL;
1600
1601 devname = if_indextoname(iflink, buf);
1602 if (!devname)
1603 return NULL;
1604
1605 return device_get(devname, true);
1606 }
1607
1608 static bool
1609 read_string_file(int dir_fd, const char *file, char *buf, int len)
1610 {
1611 bool ret = false;
1612 char *c;
1613 int fd;
1614
1615 fd = openat(dir_fd, file, O_RDONLY);
1616 if (fd < 0)
1617 return false;
1618
1619 retry:
1620 len = read(fd, buf, len - 1);
1621 if (len < 0) {
1622 if (errno == EINTR)
1623 goto retry;
1624 } else if (len > 0) {
1625 buf[len] = 0;
1626
1627 c = strchr(buf, '\n');
1628 if (c)
1629 *c = 0;
1630
1631 ret = true;
1632 }
1633
1634 close(fd);
1635
1636 return ret;
1637 }
1638
1639 static bool
1640 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1641 {
1642 char buf[64];
1643 bool ret = false;
1644
1645 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1646 if (ret)
1647 *val = strtoull(buf, NULL, 0);
1648
1649 return ret;
1650 }
1651
1652 /* Assume advertised flags == supported flags */
1653 static const struct {
1654 uint32_t mask;
1655 const char *name;
1656 } ethtool_link_modes[] = {
1657 { ADVERTISED_10baseT_Half, "10H" },
1658 { ADVERTISED_10baseT_Full, "10F" },
1659 { ADVERTISED_100baseT_Half, "100H" },
1660 { ADVERTISED_100baseT_Full, "100F" },
1661 { ADVERTISED_1000baseT_Half, "1000H" },
1662 { ADVERTISED_1000baseT_Full, "1000F" },
1663 };
1664
1665 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1666 {
1667 int i;
1668 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1669 if (mask & ethtool_link_modes[i].mask)
1670 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1671 }
1672 }
1673
1674 bool
1675 system_if_force_external(const char *ifname)
1676 {
1677 char buf[64];
1678 struct stat s;
1679
1680 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1681 return stat(buf, &s) == 0;
1682 }
1683
1684 int
1685 system_if_dump_info(struct device *dev, struct blob_buf *b)
1686 {
1687 struct ethtool_cmd ecmd;
1688 struct ifreq ifr;
1689 char buf[64], *s;
1690 void *c;
1691 int dir_fd;
1692
1693 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1694 dir_fd = open(buf, O_DIRECTORY);
1695
1696 memset(&ecmd, 0, sizeof(ecmd));
1697 memset(&ifr, 0, sizeof(ifr));
1698 strcpy(ifr.ifr_name, dev->ifname);
1699 ifr.ifr_data = (caddr_t) &ecmd;
1700 ecmd.cmd = ETHTOOL_GSET;
1701
1702 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1703 c = blobmsg_open_array(b, "link-advertising");
1704 system_add_link_modes(b, ecmd.advertising);
1705 blobmsg_close_array(b, c);
1706
1707 c = blobmsg_open_array(b, "link-supported");
1708 system_add_link_modes(b, ecmd.supported);
1709 blobmsg_close_array(b, c);
1710
1711 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1712 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1713 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1714 blobmsg_add_string_buffer(b);
1715 }
1716
1717 close(dir_fd);
1718 return 0;
1719 }
1720
1721 int
1722 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1723 {
1724 const char *const counters[] = {
1725 "collisions", "rx_frame_errors", "tx_compressed",
1726 "multicast", "rx_length_errors", "tx_dropped",
1727 "rx_bytes", "rx_missed_errors", "tx_errors",
1728 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1729 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1730 "rx_dropped", "tx_aborted_errors", "tx_packets",
1731 "rx_errors", "tx_bytes", "tx_window_errors",
1732 "rx_fifo_errors", "tx_carrier_errors",
1733 };
1734 char buf[64];
1735 int stats_dir;
1736 int i;
1737 uint64_t val = 0;
1738
1739 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1740 stats_dir = open(buf, O_DIRECTORY);
1741 if (stats_dir < 0)
1742 return -1;
1743
1744 for (i = 0; i < ARRAY_SIZE(counters); i++)
1745 if (read_uint64_file(stats_dir, counters[i], &val))
1746 blobmsg_add_u64(b, counters[i], val);
1747
1748 close(stats_dir);
1749 return 0;
1750 }
1751
1752 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1753 {
1754 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1755 int alen = v4 ? 4 : 16;
1756 unsigned int flags = 0;
1757 struct ifaddrmsg ifa = {
1758 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1759 .ifa_prefixlen = addr->mask,
1760 .ifa_index = dev->ifindex,
1761 };
1762
1763 struct nl_msg *msg;
1764 if (cmd == RTM_NEWADDR)
1765 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1766
1767 msg = nlmsg_alloc_simple(cmd, flags);
1768 if (!msg)
1769 return -1;
1770
1771 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1772 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1773 if (v4) {
1774 if (addr->broadcast)
1775 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1776 if (addr->point_to_point)
1777 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1778 } else {
1779 time_t now = system_get_rtime();
1780 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1781
1782 if (addr->preferred_until) {
1783 int64_t preferred = addr->preferred_until - now;
1784 if (preferred < 0)
1785 preferred = 0;
1786 else if (preferred > UINT32_MAX)
1787 preferred = UINT32_MAX;
1788
1789 cinfo.ifa_prefered = preferred;
1790 }
1791
1792 if (addr->valid_until) {
1793 int64_t valid = addr->valid_until - now;
1794 if (valid <= 0) {
1795 nlmsg_free(msg);
1796 return -1;
1797 }
1798 else if (valid > UINT32_MAX)
1799 valid = UINT32_MAX;
1800
1801 cinfo.ifa_valid = valid;
1802 }
1803
1804 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1805
1806 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1807 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1808 }
1809
1810 return system_rtnl_call(msg);
1811 }
1812
1813 int system_add_address(struct device *dev, struct device_addr *addr)
1814 {
1815 return system_addr(dev, addr, RTM_NEWADDR);
1816 }
1817
1818 int system_del_address(struct device *dev, struct device_addr *addr)
1819 {
1820 return system_addr(dev, addr, RTM_DELADDR);
1821 }
1822
1823 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1824 {
1825 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1826 bool have_gw;
1827 unsigned int flags = 0;
1828
1829 if (alen == 4)
1830 have_gw = !!route->nexthop.in.s_addr;
1831 else
1832 have_gw = route->nexthop.in6.s6_addr32[0] ||
1833 route->nexthop.in6.s6_addr32[1] ||
1834 route->nexthop.in6.s6_addr32[2] ||
1835 route->nexthop.in6.s6_addr32[3];
1836
1837 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1838 ? route->table : RT_TABLE_MAIN;
1839
1840 struct rtmsg rtm = {
1841 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1842 .rtm_dst_len = route->mask,
1843 .rtm_src_len = route->sourcemask,
1844 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1845 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1846 .rtm_scope = RT_SCOPE_NOWHERE,
1847 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1848 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1849 };
1850 struct nl_msg *msg;
1851
1852 if (cmd == RTM_NEWROUTE) {
1853 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1854
1855 if (!dev) { // Add null-route
1856 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1857 rtm.rtm_type = RTN_UNREACHABLE;
1858 }
1859 else
1860 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1861 }
1862
1863 if (route->flags & DEVROUTE_TYPE) {
1864 rtm.rtm_type = route->type;
1865 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1866 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1867 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1868 rtm.rtm_table = RT_TABLE_LOCAL;
1869 }
1870
1871 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1872 rtm.rtm_scope = RT_SCOPE_HOST;
1873 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1874 rtm.rtm_type == RTN_ANYCAST) {
1875 rtm.rtm_scope = RT_SCOPE_LINK;
1876 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1877 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1878 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1879 dev = NULL;
1880 }
1881 }
1882
1883 msg = nlmsg_alloc_simple(cmd, flags);
1884 if (!msg)
1885 return -1;
1886
1887 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1888
1889 if (route->mask)
1890 nla_put(msg, RTA_DST, alen, &route->addr);
1891
1892 if (route->sourcemask) {
1893 if (rtm.rtm_family == AF_INET)
1894 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1895 else
1896 nla_put(msg, RTA_SRC, alen, &route->source);
1897 }
1898
1899 if (route->metric > 0)
1900 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1901
1902 if (have_gw)
1903 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1904
1905 if (dev)
1906 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1907
1908 if (table >= 256)
1909 nla_put_u32(msg, RTA_TABLE, table);
1910
1911 if (route->flags & DEVROUTE_MTU) {
1912 struct nlattr *metrics;
1913
1914 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1915 goto nla_put_failure;
1916
1917 nla_put_u32(msg, RTAX_MTU, route->mtu);
1918
1919 nla_nest_end(msg, metrics);
1920 }
1921
1922 return system_rtnl_call(msg);
1923
1924 nla_put_failure:
1925 nlmsg_free(msg);
1926 return -ENOMEM;
1927 }
1928
1929 int system_add_route(struct device *dev, struct device_route *route)
1930 {
1931 return system_rt(dev, route, RTM_NEWROUTE);
1932 }
1933
1934 int system_del_route(struct device *dev, struct device_route *route)
1935 {
1936 return system_rt(dev, route, RTM_DELROUTE);
1937 }
1938
1939 int system_flush_routes(void)
1940 {
1941 const char *names[] = {
1942 "/proc/sys/net/ipv4/route/flush",
1943 "/proc/sys/net/ipv6/route/flush"
1944 };
1945 int fd, i;
1946
1947 for (i = 0; i < ARRAY_SIZE(names); i++) {
1948 fd = open(names[i], O_WRONLY);
1949 if (fd < 0)
1950 continue;
1951
1952 if (write(fd, "-1", 2)) {}
1953 close(fd);
1954 }
1955 return 0;
1956 }
1957
1958 bool system_resolve_rt_type(const char *type, unsigned int *id)
1959 {
1960 return system_rtn_aton(type, id);
1961 }
1962
1963 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1964 {
1965 FILE *f;
1966 char *e, buf[128];
1967 unsigned int n, proto = 256;
1968
1969 if ((n = strtoul(type, &e, 0)) >= 0 && !*e && e != type)
1970 proto = n;
1971 else if (!strcmp(type, "unspec"))
1972 proto = RTPROT_UNSPEC;
1973 else if (!strcmp(type, "kernel"))
1974 proto = RTPROT_KERNEL;
1975 else if (!strcmp(type, "boot"))
1976 proto = RTPROT_BOOT;
1977 else if (!strcmp(type, "static"))
1978 proto = RTPROT_STATIC;
1979 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
1980 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
1981 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
1982 continue;
1983
1984 n = strtoul(e, NULL, 10);
1985 e = strtok(NULL, " \t\n");
1986
1987 if (e && !strcmp(e, type)) {
1988 proto = n;
1989 break;
1990 }
1991 }
1992 fclose(f);
1993 }
1994
1995 if (proto > 255)
1996 return false;
1997
1998 *id = proto;
1999 return true;
2000 }
2001
2002 bool system_resolve_rt_table(const char *name, unsigned int *id)
2003 {
2004 FILE *f;
2005 char *e, buf[128];
2006 unsigned int n, table = RT_TABLE_UNSPEC;
2007
2008 /* first try to parse table as number */
2009 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2010 table = n;
2011
2012 /* handle well known aliases */
2013 else if (!strcmp(name, "default"))
2014 table = RT_TABLE_DEFAULT;
2015 else if (!strcmp(name, "main"))
2016 table = RT_TABLE_MAIN;
2017 else if (!strcmp(name, "local"))
2018 table = RT_TABLE_LOCAL;
2019
2020 /* try to look up name in /etc/iproute2/rt_tables */
2021 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2022 {
2023 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2024 {
2025 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2026 continue;
2027
2028 n = strtoul(e, NULL, 10);
2029 e = strtok(NULL, " \t\n");
2030
2031 if (e && !strcmp(e, name))
2032 {
2033 table = n;
2034 break;
2035 }
2036 }
2037
2038 fclose(f);
2039 }
2040
2041 if (table == RT_TABLE_UNSPEC)
2042 return false;
2043
2044 *id = table;
2045 return true;
2046 }
2047
2048 bool system_is_default_rt_table(unsigned int id)
2049 {
2050 return (id == RT_TABLE_MAIN);
2051 }
2052
2053 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2054 {
2055 char *e;
2056 unsigned int n;
2057
2058 if (!strcmp(filter, "strict"))
2059 n = 1;
2060 else if (!strcmp(filter, "loose"))
2061 n = 2;
2062 else {
2063 n = strtoul(filter, &e, 0);
2064 if (*e || e == filter || n > 2)
2065 return false;
2066 }
2067
2068 *id = n;
2069 return true;
2070 }
2071
2072 static int system_iprule(struct iprule *rule, int cmd)
2073 {
2074 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2075
2076 struct nl_msg *msg;
2077 struct rtmsg rtm = {
2078 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2079 .rtm_protocol = RTPROT_STATIC,
2080 .rtm_scope = RT_SCOPE_UNIVERSE,
2081 .rtm_table = RT_TABLE_UNSPEC,
2082 .rtm_type = RTN_UNSPEC,
2083 .rtm_flags = 0,
2084 };
2085
2086 if (cmd == RTM_NEWRULE)
2087 rtm.rtm_type = RTN_UNICAST;
2088
2089 if (rule->invert)
2090 rtm.rtm_flags |= FIB_RULE_INVERT;
2091
2092 if (rule->flags & IPRULE_SRC)
2093 rtm.rtm_src_len = rule->src_mask;
2094
2095 if (rule->flags & IPRULE_DEST)
2096 rtm.rtm_dst_len = rule->dest_mask;
2097
2098 if (rule->flags & IPRULE_TOS)
2099 rtm.rtm_tos = rule->tos;
2100
2101 if (rule->flags & IPRULE_LOOKUP) {
2102 if (rule->lookup < 256)
2103 rtm.rtm_table = rule->lookup;
2104 }
2105
2106 if (rule->flags & IPRULE_ACTION)
2107 rtm.rtm_type = rule->action;
2108 else if (rule->flags & IPRULE_GOTO)
2109 rtm.rtm_type = FR_ACT_GOTO;
2110 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2111 rtm.rtm_type = FR_ACT_NOP;
2112
2113 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2114
2115 if (!msg)
2116 return -1;
2117
2118 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2119
2120 if (rule->flags & IPRULE_IN)
2121 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2122
2123 if (rule->flags & IPRULE_OUT)
2124 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2125
2126 if (rule->flags & IPRULE_SRC)
2127 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2128
2129 if (rule->flags & IPRULE_DEST)
2130 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2131
2132 if (rule->flags & IPRULE_PRIORITY)
2133 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2134 else if (cmd == RTM_NEWRULE)
2135 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2136
2137 if (rule->flags & IPRULE_FWMARK)
2138 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2139
2140 if (rule->flags & IPRULE_FWMASK)
2141 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2142
2143 if (rule->flags & IPRULE_LOOKUP) {
2144 if (rule->lookup >= 256)
2145 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2146 }
2147
2148 if (rule->flags & IPRULE_GOTO)
2149 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2150
2151 return system_rtnl_call(msg);
2152 }
2153
2154 int system_add_iprule(struct iprule *rule)
2155 {
2156 return system_iprule(rule, RTM_NEWRULE);
2157 }
2158
2159 int system_del_iprule(struct iprule *rule)
2160 {
2161 return system_iprule(rule, RTM_DELRULE);
2162 }
2163
2164 int system_flush_iprules(void)
2165 {
2166 int rv = 0;
2167 struct iprule rule;
2168
2169 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2170 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2171
2172 memset(&rule, 0, sizeof(rule));
2173
2174
2175 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2176
2177 rule.priority = 0;
2178 rule.lookup = RT_TABLE_LOCAL;
2179 rv |= system_iprule(&rule, RTM_NEWRULE);
2180
2181 rule.priority = 32766;
2182 rule.lookup = RT_TABLE_MAIN;
2183 rv |= system_iprule(&rule, RTM_NEWRULE);
2184
2185 rule.priority = 32767;
2186 rule.lookup = RT_TABLE_DEFAULT;
2187 rv |= system_iprule(&rule, RTM_NEWRULE);
2188
2189
2190 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2191
2192 rule.priority = 0;
2193 rule.lookup = RT_TABLE_LOCAL;
2194 rv |= system_iprule(&rule, RTM_NEWRULE);
2195
2196 rule.priority = 32766;
2197 rule.lookup = RT_TABLE_MAIN;
2198 rv |= system_iprule(&rule, RTM_NEWRULE);
2199
2200 return rv;
2201 }
2202
2203 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2204 {
2205 return system_rtn_aton(action, id);
2206 }
2207
2208 time_t system_get_rtime(void)
2209 {
2210 struct timespec ts;
2211 struct timeval tv;
2212
2213 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2214 return ts.tv_sec;
2215
2216 if (gettimeofday(&tv, NULL) == 0)
2217 return tv.tv_sec;
2218
2219 return 0;
2220 }
2221
2222 #ifndef IP_DF
2223 #define IP_DF 0x4000
2224 #endif
2225
2226 static int tunnel_ioctl(const char *name, int cmd, void *p)
2227 {
2228 struct ifreq ifr;
2229
2230 memset(&ifr, 0, sizeof(ifr));
2231 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2232 ifr.ifr_ifru.ifru_data = p;
2233 return ioctl(sock_ioctl, cmd, &ifr);
2234 }
2235
2236 #ifdef IFLA_IPTUN_MAX
2237 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2238 static int system_add_gre_tunnel(const char *name, const char *kind,
2239 const unsigned int link, struct blob_attr **tb, bool v6)
2240 {
2241 struct nl_msg *nlm;
2242 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2243 struct blob_attr *cur;
2244 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2245 uint16_t iflags = 0, oflags = 0;
2246 uint8_t tos = 0;
2247 int ret = 0, ttl = 0;
2248
2249 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2250 if (!nlm)
2251 return -1;
2252
2253 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2254 nla_put_string(nlm, IFLA_IFNAME, name);
2255
2256 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2257 if (!linkinfo) {
2258 ret = -ENOMEM;
2259 goto failure;
2260 }
2261
2262 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2263 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2264 if (!infodata) {
2265 ret = -ENOMEM;
2266 goto failure;
2267 }
2268
2269 if (link)
2270 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2271
2272 if ((cur = tb[TUNNEL_ATTR_TTL]))
2273 ttl = blobmsg_get_u32(cur);
2274
2275 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2276 char *str = blobmsg_get_string(cur);
2277 if (strcmp(str, "inherit")) {
2278 unsigned uval;
2279
2280 if (!system_tos_aton(str, &uval)) {
2281 ret = -EINVAL;
2282 goto failure;
2283 }
2284
2285 if (v6)
2286 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2287 else
2288 tos = uval;
2289 } else {
2290 if (v6)
2291 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2292 else
2293 tos = 1;
2294 }
2295 }
2296
2297 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2298 uint8_t icsum, ocsum, iseqno, oseqno;
2299 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2300 &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2301 ret = -EINVAL;
2302 goto failure;
2303 }
2304
2305 if (ikey)
2306 iflags |= GRE_KEY;
2307
2308 if (okey)
2309 oflags |= GRE_KEY;
2310
2311 if (icsum)
2312 iflags |= GRE_CSUM;
2313
2314 if (ocsum)
2315 oflags |= GRE_CSUM;
2316
2317 if (iseqno)
2318 iflags |= GRE_SEQ;
2319
2320 if (oseqno)
2321 oflags |= GRE_SEQ;
2322 }
2323
2324 if (v6) {
2325 struct in6_addr in6buf;
2326 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2327 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2328 ret = -EINVAL;
2329 goto failure;
2330 }
2331 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2332 }
2333
2334 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2335 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2336 ret = -EINVAL;
2337 goto failure;
2338 }
2339 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2340 }
2341 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2342
2343 if (flowinfo)
2344 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2345
2346 if (flags)
2347 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2348
2349 if (!ttl)
2350 ttl = 64;
2351 } else {
2352 struct in_addr inbuf;
2353 bool set_df = true;
2354
2355 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2356 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2357 ret = -EINVAL;
2358 goto failure;
2359 }
2360 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2361 }
2362
2363 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2364 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2365 ret = -EINVAL;
2366 goto failure;
2367 }
2368 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2369
2370 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2371 if (!okey) {
2372 okey = inbuf.s_addr;
2373 oflags |= GRE_KEY;
2374 }
2375
2376 if (!ikey) {
2377 ikey = inbuf.s_addr;
2378 iflags |= GRE_KEY;
2379 }
2380 }
2381 }
2382
2383 if ((cur = tb[TUNNEL_ATTR_DF]))
2384 set_df = blobmsg_get_bool(cur);
2385
2386 if (!set_df) {
2387 /* ttl != 0 and nopmtudisc are incompatible */
2388 if (ttl) {
2389 ret = -EINVAL;
2390 goto failure;
2391 }
2392 } else if (!ttl)
2393 ttl = 64;
2394
2395 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2396
2397 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2398 }
2399
2400 if (ttl)
2401 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2402
2403 if (oflags)
2404 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2405
2406 if (iflags)
2407 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2408
2409 if (okey)
2410 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2411
2412 if (ikey)
2413 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2414
2415 nla_nest_end(nlm, infodata);
2416 nla_nest_end(nlm, linkinfo);
2417
2418 return system_rtnl_call(nlm);
2419
2420 failure:
2421 nlmsg_free(nlm);
2422 return ret;
2423 }
2424 #endif
2425
2426 #ifdef IFLA_VTI_MAX
2427 static int system_add_vti_tunnel(const char *name, const char *kind,
2428 const unsigned int link, struct blob_attr **tb, bool v6)
2429 {
2430 struct nl_msg *nlm;
2431 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2432 struct blob_attr *cur;
2433 uint32_t ikey = 0, okey = 0;
2434 int ret = 0;
2435
2436 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2437 if (!nlm)
2438 return -1;
2439
2440 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2441 nla_put_string(nlm, IFLA_IFNAME, name);
2442
2443 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2444 if (!linkinfo) {
2445 ret = -ENOMEM;
2446 goto failure;
2447 }
2448
2449 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2450 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2451 if (!infodata) {
2452 ret = -ENOMEM;
2453 goto failure;
2454 }
2455
2456 if (link)
2457 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2458
2459 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2460 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2461 &ikey, &okey) < 2) {
2462 ret = -EINVAL;
2463 goto failure;
2464 }
2465 }
2466
2467 if (v6) {
2468 struct in6_addr in6buf;
2469 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2470 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2471 ret = -EINVAL;
2472 goto failure;
2473 }
2474 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2475 }
2476
2477 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2478 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2479 ret = -EINVAL;
2480 goto failure;
2481 }
2482 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2483 }
2484
2485 } else {
2486 struct in_addr inbuf;
2487
2488 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2489 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2490 ret = -EINVAL;
2491 goto failure;
2492 }
2493 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2494 }
2495
2496 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2497 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2498 ret = -EINVAL;
2499 goto failure;
2500 }
2501 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2502 }
2503
2504 }
2505
2506 if (okey)
2507 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2508
2509 if (ikey)
2510 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2511
2512 nla_nest_end(nlm, infodata);
2513 nla_nest_end(nlm, linkinfo);
2514
2515 return system_rtnl_call(nlm);
2516
2517 failure:
2518 nlmsg_free(nlm);
2519 return ret;
2520 }
2521 #endif
2522
2523 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2524 {
2525 struct blob_attr *cur;
2526 bool set_df = true;
2527 struct ip_tunnel_parm p = {
2528 .link = link,
2529 .iph = {
2530 .version = 4,
2531 .ihl = 5,
2532 .protocol = proto,
2533 }
2534 };
2535
2536 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2537 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2538 return -EINVAL;
2539
2540 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2541 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2542 return -EINVAL;
2543
2544 if ((cur = tb[TUNNEL_ATTR_DF]))
2545 set_df = blobmsg_get_bool(cur);
2546
2547 if ((cur = tb[TUNNEL_ATTR_TTL]))
2548 p.iph.ttl = blobmsg_get_u32(cur);
2549
2550 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2551 char *str = blobmsg_get_string(cur);
2552 if (strcmp(str, "inherit")) {
2553 unsigned uval;
2554
2555 if (!system_tos_aton(str, &uval))
2556 return -EINVAL;
2557
2558 p.iph.tos = uval;
2559 } else
2560 p.iph.tos = 1;
2561 }
2562
2563 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2564 /* ttl !=0 and nopmtudisc are incompatible */
2565 if (p.iph.ttl && p.iph.frag_off == 0)
2566 return -EINVAL;
2567
2568 strncpy(p.name, name, sizeof(p.name));
2569
2570 switch (p.iph.protocol) {
2571 case IPPROTO_IPIP:
2572 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2573 case IPPROTO_IPV6:
2574 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2575 default:
2576 break;
2577 }
2578 return -1;
2579 }
2580
2581 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2582 {
2583 struct blob_attr *cur;
2584 const char *str;
2585
2586 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2587 return -EINVAL;
2588 str = blobmsg_data(cur);
2589
2590 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2591 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2592 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6"))
2593 return system_link_del(name);
2594 else
2595 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2596 }
2597
2598 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2599 {
2600 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2601
2602 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2603 blob_data(attr), blob_len(attr));
2604
2605 return __system_del_ip_tunnel(name, tb);
2606 }
2607
2608 int system_update_ipv6_mtu(struct device *dev, int mtu)
2609 {
2610 int ret = -1;
2611 char buf[64];
2612 int fd;
2613
2614 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2615 dev->ifname);
2616
2617 fd = open(buf, O_RDWR);
2618 if (fd < 0)
2619 return ret;
2620
2621 if (!mtu) {
2622 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2623 if (len < 0)
2624 goto out;
2625
2626 buf[len] = 0;
2627 ret = atoi(buf);
2628 } else {
2629 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2630 ret = mtu;
2631 }
2632
2633 out:
2634 close(fd);
2635 return ret;
2636 }
2637
2638 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2639 {
2640 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2641 struct blob_attr *cur;
2642 const char *str;
2643
2644 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2645 blob_data(attr), blob_len(attr));
2646
2647 __system_del_ip_tunnel(name, tb);
2648
2649 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2650 return -EINVAL;
2651 str = blobmsg_data(cur);
2652
2653 unsigned int ttl = 0;
2654 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2655 ttl = blobmsg_get_u32(cur);
2656 if (ttl > 255)
2657 return -EINVAL;
2658 }
2659
2660 unsigned int link = 0;
2661 if ((cur = tb[TUNNEL_ATTR_LINK])) {
2662 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2663 if (!iface)
2664 return -EINVAL;
2665
2666 if (iface->l3_dev.dev)
2667 link = iface->l3_dev.dev->ifindex;
2668 }
2669
2670 if (!strcmp(str, "sit")) {
2671 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2672 return -1;
2673
2674 #ifdef SIOCADD6RD
2675 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2676 unsigned int mask;
2677 struct ip_tunnel_6rd p6;
2678
2679 memset(&p6, 0, sizeof(p6));
2680
2681 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2682 &p6.prefix, &mask) || mask > 128)
2683 return -EINVAL;
2684 p6.prefixlen = mask;
2685
2686 if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2687 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2688 &p6.relay_prefix, &mask) || mask > 32)
2689 return -EINVAL;
2690 p6.relay_prefixlen = mask;
2691 }
2692
2693 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2694 __system_del_ip_tunnel(name, tb);
2695 return -1;
2696 }
2697 }
2698 #endif
2699 #ifdef IFLA_IPTUN_MAX
2700 } else if (!strcmp(str, "ipip6")) {
2701 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2702 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2703 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2704 int ret = 0;
2705
2706 if (!nlm)
2707 return -1;
2708
2709 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2710 nla_put_string(nlm, IFLA_IFNAME, name);
2711
2712 if (link)
2713 nla_put_u32(nlm, IFLA_LINK, link);
2714
2715 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2716 if (!linkinfo) {
2717 ret = -ENOMEM;
2718 goto failure;
2719 }
2720 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2721 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2722 if (!infodata) {
2723 ret = -ENOMEM;
2724 goto failure;
2725 }
2726
2727 if (link)
2728 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2729
2730 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2731 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2732 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2733
2734 struct in6_addr in6buf;
2735 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2736 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2737 ret = -EINVAL;
2738 goto failure;
2739 }
2740 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2741 }
2742
2743 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2744 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2745 ret = -EINVAL;
2746 goto failure;
2747 }
2748 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2749 }
2750
2751 #ifdef IFLA_IPTUN_FMR_MAX
2752 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2753 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2754
2755 struct blob_attr *fmr;
2756 unsigned rem, fmrcnt = 0;
2757 blobmsg_for_each_attr(fmr, cur, rem) {
2758 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2759 continue;
2760
2761 unsigned ip4len, ip6len, ealen, offset = 6;
2762 char ip6buf[48];
2763 char ip4buf[16];
2764
2765 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2766 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2767 ret = -EINVAL;
2768 goto failure;
2769 }
2770
2771 struct in6_addr ip6prefix;
2772 struct in_addr ip4prefix;
2773 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2774 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2775 ret = -EINVAL;
2776 goto failure;
2777 }
2778
2779 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2780
2781 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2782 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2783 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2784 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2785 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2786 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2787
2788 nla_nest_end(nlm, rule);
2789 }
2790
2791 nla_nest_end(nlm, fmrs);
2792 }
2793 #endif
2794
2795 nla_nest_end(nlm, infodata);
2796 nla_nest_end(nlm, linkinfo);
2797
2798 return system_rtnl_call(nlm);
2799 failure:
2800 nlmsg_free(nlm);
2801 return ret;
2802 } else if (!strcmp(str, "greip")) {
2803 return system_add_gre_tunnel(name, "gre", link, tb, false);
2804 } else if (!strcmp(str, "gretapip")) {
2805 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2806 } else if (!strcmp(str, "greip6")) {
2807 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2808 } else if (!strcmp(str, "gretapip6")) {
2809 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2810 #ifdef IFLA_VTI_MAX
2811 } else if (!strcmp(str, "vtiip")) {
2812 return system_add_vti_tunnel(name, "vti", link, tb, false);
2813 } else if (!strcmp(str, "vtiip6")) {
2814 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2815 #endif
2816 #endif
2817 } else if (!strcmp(str, "ipip")) {
2818 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2819 }
2820 else
2821 return -EINVAL;
2822
2823 return 0;
2824 }
OpenWrt Network interface configuration daemon