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netifd: Add option to configure locktime for each device
[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_neigh4locktime(struct device *dev, const char *val)
320 {
321 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
322 }
323
324 static void system_set_dadtransmits(struct device *dev, const char *val)
325 {
326 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
327 }
328
329 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
330 {
331 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
332 }
333
334 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
335 {
336 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
337 }
338
339 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
340 {
341 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
342 }
343
344 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
345 {
346 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
347 "/sys/class/net/%s/brport/multicast_router",
348 dev->ifname, val);
349 }
350
351 static void system_bridge_set_robustness(struct device *dev, const char *val)
352 {
353 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
354 dev->ifname, val);
355 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
356 dev->ifname, val);
357 }
358
359 static void system_bridge_set_query_interval(struct device *dev, const char *val)
360 {
361 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
362 dev->ifname, val);
363 }
364
365 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
366 {
367 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
368 dev->ifname, val);
369 }
370
371 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
372 {
373 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
374 dev->ifname, val);
375 }
376
377 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
378 {
379 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
380 dev->ifname, val);
381 }
382
383 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
384 {
385 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
386 dev->ifname, val);
387 }
388
389 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
390 {
391 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
392 dev->ifname, val);
393 }
394
395 static void system_bridge_set_learning(struct device *dev, const char *val)
396 {
397 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
398 }
399
400 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
401 {
402 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
403 }
404
405 static void system_set_sendredirects(struct device *dev, const char *val)
406 {
407 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
408 }
409
410 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
411 {
412 int fd = -1, ret = -1;
413
414 fd = open(path, O_RDONLY);
415 if (fd < 0)
416 goto out;
417
418 ssize_t len = read(fd, buf, buf_sz - 1);
419 if (len < 0)
420 goto out;
421
422 ret = buf[len] = 0;
423
424 out:
425 if (fd >= 0)
426 close(fd);
427
428 return ret;
429 }
430
431 static int
432 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
433 {
434 snprintf(dev_buf, sizeof(dev_buf), path, device);
435 return system_get_sysctl(dev_buf, buf, buf_sz);
436 }
437
438 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
439 {
440 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
441 dev->ifname, buf, buf_sz);
442 }
443
444 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
445 {
446 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
447 dev->ifname, buf, buf_sz);
448 }
449
450 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
451 {
452 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
453 dev->ifname, buf, buf_sz);
454 }
455
456 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
457 {
458 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
459 dev->ifname, buf, buf_sz);
460 }
461
462 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
463 {
464 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
465 dev->ifname, buf, buf_sz);
466 }
467
468 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
469 {
470 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
471 dev->ifname, buf, buf_sz);
472 }
473
474 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
475 {
476 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
477 dev->ifname, buf, buf_sz);
478 }
479
480 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
481 {
482 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
483 dev->ifname, buf, buf_sz);
484 }
485
486 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
487 {
488 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
489 dev->ifname, buf, buf_sz);
490 }
491
492 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
493 {
494 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
495 dev->ifname, buf, buf_sz);
496 }
497
498 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
499 {
500 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
501 dev->ifname, buf, buf_sz);
502 }
503
504 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
505 {
506 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
507 dev->ifname, buf, buf_sz);
508 }
509
510 // Evaluate netlink messages
511 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
512 {
513 struct nlmsghdr *nh = nlmsg_hdr(msg);
514 struct nlattr *nla[__IFLA_MAX];
515 int link_state = 0;
516 char buf[10];
517
518 if (nh->nlmsg_type != RTM_NEWLINK)
519 goto out;
520
521 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
522 if (!nla[IFLA_IFNAME])
523 goto out;
524
525 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
526 if (!dev)
527 goto out;
528
529 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
530 link_state = strtoul(buf, NULL, 0);
531
532 device_set_link(dev, link_state ? true : false);
533
534 out:
535 return 0;
536 }
537
538 static void
539 handle_hotplug_msg(char *data, int size)
540 {
541 const char *subsystem = NULL, *interface = NULL;
542 char *cur, *end, *sep;
543 struct device *dev;
544 int skip;
545 bool add;
546
547 if (!strncmp(data, "add@", 4))
548 add = true;
549 else if (!strncmp(data, "remove@", 7))
550 add = false;
551 else
552 return;
553
554 skip = strlen(data) + 1;
555 end = data + size;
556
557 for (cur = data + skip; cur < end; cur += skip) {
558 skip = strlen(cur) + 1;
559
560 sep = strchr(cur, '=');
561 if (!sep)
562 continue;
563
564 *sep = 0;
565 if (!strcmp(cur, "INTERFACE"))
566 interface = sep + 1;
567 else if (!strcmp(cur, "SUBSYSTEM")) {
568 subsystem = sep + 1;
569 if (strcmp(subsystem, "net") != 0)
570 return;
571 }
572 if (subsystem && interface)
573 goto found;
574 }
575 return;
576
577 found:
578 dev = device_find(interface);
579 if (!dev)
580 return;
581
582 if (dev->type != &simple_device_type)
583 return;
584
585 if (add && system_if_force_external(dev->ifname))
586 return;
587
588 device_set_present(dev, add);
589 }
590
591 static void
592 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
593 {
594 struct event_socket *ev = container_of(u, struct event_socket, uloop);
595 struct sockaddr_nl nla;
596 unsigned char *buf = NULL;
597 int size;
598
599 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
600 if (nla.nl_pid == 0)
601 handle_hotplug_msg((char *) buf, size);
602
603 free(buf);
604 }
605 }
606
607 static int system_rtnl_call(struct nl_msg *msg)
608 {
609 int ret;
610
611 ret = nl_send_auto_complete(sock_rtnl, msg);
612 nlmsg_free(msg);
613
614 if (ret < 0)
615 return ret;
616
617 return nl_wait_for_ack(sock_rtnl);
618 }
619
620 int system_bridge_delbr(struct device *bridge)
621 {
622 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
623 }
624
625 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
626 {
627 struct ifreq ifr;
628
629 memset(&ifr, 0, sizeof(ifr));
630 if (dev)
631 ifr.ifr_ifindex = dev->ifindex;
632 else
633 ifr.ifr_data = data;
634 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
635 return ioctl(sock_ioctl, cmd, &ifr);
636 }
637
638 static bool system_is_bridge(const char *name, char *buf, int buflen)
639 {
640 struct stat st;
641
642 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
643 if (stat(buf, &st) < 0)
644 return false;
645
646 return true;
647 }
648
649 static char *system_get_bridge(const char *name, char *buf, int buflen)
650 {
651 char *path;
652 ssize_t len = -1;
653 glob_t gl;
654
655 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
656 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
657 return NULL;
658
659 if (gl.gl_pathc > 0)
660 len = readlink(gl.gl_pathv[0], buf, buflen);
661
662 globfree(&gl);
663
664 if (len < 0)
665 return NULL;
666
667 buf[len] = 0;
668 path = strrchr(buf, '/');
669 if (!path)
670 return NULL;
671
672 return path + 1;
673 }
674
675 static void
676 system_bridge_set_wireless(struct device *bridge, struct device *dev)
677 {
678 bool mcast_to_ucast = dev->wireless_ap;
679 bool hairpin = true;
680
681 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
682 !bridge->settings.multicast_to_unicast)
683 mcast_to_ucast = false;
684
685 if (!mcast_to_ucast || dev->wireless_isolate)
686 hairpin = false;
687
688 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
689 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
690 }
691
692 int system_bridge_addif(struct device *bridge, struct device *dev)
693 {
694 char buf[64];
695 char *oldbr;
696 int ret = 0;
697
698 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
699 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
700 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
701
702 if (dev->wireless)
703 system_bridge_set_wireless(bridge, dev);
704
705 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
706 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
707 system_bridge_set_multicast_router(dev, buf, false);
708 }
709
710 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
711 dev->settings.multicast_fast_leave)
712 system_bridge_set_multicast_fast_leave(dev, "1");
713
714 if (dev->settings.flags & DEV_OPT_LEARNING &&
715 !dev->settings.learning)
716 system_bridge_set_learning(dev, "0");
717
718 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
719 !dev->settings.unicast_flood)
720 system_bridge_set_unicast_flood(dev, "0");
721
722 return ret;
723 }
724
725 int system_bridge_delif(struct device *bridge, struct device *dev)
726 {
727 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
728 }
729
730 int system_if_resolve(struct device *dev)
731 {
732 struct ifreq ifr;
733 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
734 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
735 return ifr.ifr_ifindex;
736 else
737 return 0;
738 }
739
740 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
741 {
742 struct ifreq ifr;
743
744 memset(&ifr, 0, sizeof(ifr));
745 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
746 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
747 ifr.ifr_flags |= add;
748 ifr.ifr_flags &= ~rem;
749 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
750 }
751
752 struct clear_data {
753 struct nl_msg *msg;
754 struct device *dev;
755 int type;
756 int size;
757 int af;
758 };
759
760
761 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
762 {
763 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
764
765 return ifa->ifa_index == ifindex;
766 }
767
768 static bool check_route(struct nlmsghdr *hdr, int ifindex)
769 {
770 struct rtmsg *r = NLMSG_DATA(hdr);
771 struct nlattr *tb[__RTA_MAX];
772
773 if (r->rtm_protocol == RTPROT_KERNEL &&
774 r->rtm_family == AF_INET6)
775 return false;
776
777 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
778 if (!tb[RTA_OIF])
779 return false;
780
781 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
782 }
783
784 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
785 {
786 return true;
787 }
788
789 static int cb_clear_event(struct nl_msg *msg, void *arg)
790 {
791 struct clear_data *clr = arg;
792 struct nlmsghdr *hdr = nlmsg_hdr(msg);
793 bool (*cb)(struct nlmsghdr *, int ifindex);
794 int type;
795
796 switch(clr->type) {
797 case RTM_GETADDR:
798 type = RTM_DELADDR;
799 if (hdr->nlmsg_type != RTM_NEWADDR)
800 return NL_SKIP;
801
802 cb = check_ifaddr;
803 break;
804 case RTM_GETROUTE:
805 type = RTM_DELROUTE;
806 if (hdr->nlmsg_type != RTM_NEWROUTE)
807 return NL_SKIP;
808
809 cb = check_route;
810 break;
811 case RTM_GETRULE:
812 type = RTM_DELRULE;
813 if (hdr->nlmsg_type != RTM_NEWRULE)
814 return NL_SKIP;
815
816 cb = check_rule;
817 break;
818 default:
819 return NL_SKIP;
820 }
821
822 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
823 return NL_SKIP;
824
825 if (type == RTM_DELRULE)
826 D(SYSTEM, "Remove a rule\n");
827 else
828 D(SYSTEM, "Remove %s from device %s\n",
829 type == RTM_DELADDR ? "an address" : "a route",
830 clr->dev->ifname);
831 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
832 hdr = nlmsg_hdr(clr->msg);
833 hdr->nlmsg_type = type;
834 hdr->nlmsg_flags = NLM_F_REQUEST;
835
836 nl_socket_disable_auto_ack(sock_rtnl);
837 nl_send_auto_complete(sock_rtnl, clr->msg);
838 nl_socket_enable_auto_ack(sock_rtnl);
839
840 return NL_SKIP;
841 }
842
843 static int
844 cb_finish_event(struct nl_msg *msg, void *arg)
845 {
846 int *pending = arg;
847 *pending = 0;
848 return NL_STOP;
849 }
850
851 static int
852 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
853 {
854 int *pending = arg;
855 *pending = err->error;
856 return NL_STOP;
857 }
858
859 static void
860 system_if_clear_entries(struct device *dev, int type, int af)
861 {
862 struct clear_data clr;
863 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
864 struct rtmsg rtm = {
865 .rtm_family = af,
866 .rtm_flags = RTM_F_CLONED,
867 };
868 int flags = NLM_F_DUMP;
869 int pending = 1;
870
871 clr.af = af;
872 clr.dev = dev;
873 clr.type = type;
874 switch (type) {
875 case RTM_GETADDR:
876 case RTM_GETRULE:
877 clr.size = sizeof(struct rtgenmsg);
878 break;
879 case RTM_GETROUTE:
880 clr.size = sizeof(struct rtmsg);
881 break;
882 default:
883 return;
884 }
885
886 if (!cb)
887 return;
888
889 clr.msg = nlmsg_alloc_simple(type, flags);
890 if (!clr.msg)
891 goto out;
892
893 nlmsg_append(clr.msg, &rtm, clr.size, 0);
894 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
895 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
896 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
897
898 nl_send_auto_complete(sock_rtnl, clr.msg);
899 while (pending > 0)
900 nl_recvmsgs(sock_rtnl, cb);
901
902 nlmsg_free(clr.msg);
903 out:
904 nl_cb_put(cb);
905 }
906
907 /*
908 * Clear bridge (membership) state and bring down device
909 */
910 void system_if_clear_state(struct device *dev)
911 {
912 static char buf[256];
913 char *bridge;
914
915 device_set_ifindex(dev, system_if_resolve(dev));
916 if (dev->external || !dev->ifindex)
917 return;
918
919 system_if_flags(dev->ifname, 0, IFF_UP);
920
921 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
922 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
923 system_bridge_delbr(dev);
924 return;
925 }
926
927 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
928 if (bridge) {
929 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
930 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
931 }
932
933 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
934 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
935 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
936 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
937 system_set_disable_ipv6(dev, "0");
938 }
939
940 static inline unsigned long
941 sec_to_jiffies(int val)
942 {
943 return (unsigned long) val * 100;
944 }
945
946 static void system_bridge_conf_multicast_deps(struct device *bridge,
947 struct bridge_config *cfg,
948 char *buf,
949 int buf_len)
950 {
951 int val;
952
953 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
954 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
955 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
956 val = cfg->robustness * cfg->query_interval +
957 cfg->query_response_interval;
958
959 snprintf(buf, buf_len, "%i", val);
960 system_bridge_set_membership_interval(bridge, buf);
961
962 val = cfg->robustness * cfg->query_interval +
963 cfg->query_response_interval / 2;
964
965 snprintf(buf, buf_len, "%i", val);
966 system_bridge_set_other_querier_timeout(bridge, buf);
967 }
968
969 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
970 val = cfg->query_interval / 4;
971
972 snprintf(buf, buf_len, "%i", val);
973 system_bridge_set_startup_query_interval(bridge, buf);
974 }
975 }
976
977 static void system_bridge_conf_multicast(struct device *bridge,
978 struct bridge_config *cfg,
979 char *buf,
980 int buf_len)
981 {
982 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
983 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
984
985 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
986 bridge->ifname, cfg->multicast_querier ? "1" : "0");
987
988 snprintf(buf, buf_len, "%i", cfg->hash_max);
989 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
990 bridge->ifname, buf);
991
992 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
993 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
994 system_bridge_set_multicast_router(bridge, buf, true);
995 }
996
997 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
998 snprintf(buf, buf_len, "%i", cfg->robustness);
999 system_bridge_set_robustness(bridge, buf);
1000 }
1001
1002 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1003 snprintf(buf, buf_len, "%i", cfg->query_interval);
1004 system_bridge_set_query_interval(bridge, buf);
1005 }
1006
1007 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1008 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1009 system_bridge_set_query_response_interval(bridge, buf);
1010 }
1011
1012 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1013 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1014 system_bridge_set_last_member_interval(bridge, buf);
1015 }
1016
1017 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1018 }
1019
1020 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1021 {
1022 char buf[64];
1023 unsigned long args[4] = {};
1024
1025 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1026 return -1;
1027
1028 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1029 args[1] = !!cfg->stp;
1030 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1031
1032 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1033 args[1] = sec_to_jiffies(cfg->forward_delay);
1034 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1035
1036 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1037
1038 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1039 args[1] = cfg->priority;
1040 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1041
1042 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1043 args[0] = BRCTL_SET_AGEING_TIME;
1044 args[1] = sec_to_jiffies(cfg->ageing_time);
1045 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1046 }
1047
1048 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1049 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1050 args[1] = sec_to_jiffies(cfg->hello_time);
1051 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1052 }
1053
1054 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1055 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1056 args[1] = sec_to_jiffies(cfg->max_age);
1057 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1058 }
1059
1060 return 0;
1061 }
1062
1063 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1064 {
1065 struct nl_msg *msg;
1066 struct nlattr *linkinfo, *data;
1067 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1068 int i, rv;
1069 static const struct {
1070 const char *name;
1071 enum macvlan_mode val;
1072 } modes[] = {
1073 { "private", MACVLAN_MODE_PRIVATE },
1074 { "vepa", MACVLAN_MODE_VEPA },
1075 { "bridge", MACVLAN_MODE_BRIDGE },
1076 { "passthru", MACVLAN_MODE_PASSTHRU },
1077 };
1078
1079 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1080
1081 if (!msg)
1082 return -1;
1083
1084 nlmsg_append(msg, &iim, sizeof(iim), 0);
1085
1086 if (cfg->flags & MACVLAN_OPT_MACADDR)
1087 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1088 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1089 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1090
1091 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1092 goto nla_put_failure;
1093
1094 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1095
1096 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1097 goto nla_put_failure;
1098
1099 if (cfg->mode) {
1100 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1101 if (strcmp(cfg->mode, modes[i].name) != 0)
1102 continue;
1103
1104 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1105 break;
1106 }
1107 }
1108
1109 nla_nest_end(msg, data);
1110 nla_nest_end(msg, linkinfo);
1111
1112 rv = system_rtnl_call(msg);
1113 if (rv)
1114 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1115
1116 return rv;
1117
1118 nla_put_failure:
1119 nlmsg_free(msg);
1120 return -ENOMEM;
1121 }
1122
1123 static int system_link_del(const char *ifname)
1124 {
1125 struct nl_msg *msg;
1126 struct ifinfomsg iim = {
1127 .ifi_family = AF_UNSPEC,
1128 .ifi_index = 0,
1129 };
1130
1131 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1132
1133 if (!msg)
1134 return -1;
1135
1136 nlmsg_append(msg, &iim, sizeof(iim), 0);
1137 nla_put_string(msg, IFLA_IFNAME, ifname);
1138 return system_rtnl_call(msg);
1139 }
1140
1141 int system_macvlan_del(struct device *macvlan)
1142 {
1143 return system_link_del(macvlan->ifname);
1144 }
1145
1146 int system_veth_add(struct device *veth, struct veth_config *cfg)
1147 {
1148 struct nl_msg *msg;
1149 struct ifinfomsg empty_iim = {};
1150 struct nlattr *linkinfo, *data, *veth_info;
1151 int rv;
1152
1153 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1154
1155 if (!msg)
1156 return -1;
1157
1158 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1159
1160 if (cfg->flags & VETH_OPT_MACADDR)
1161 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1162 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1163
1164 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1165 goto nla_put_failure;
1166
1167 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1168
1169 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1170 goto nla_put_failure;
1171
1172 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1173 goto nla_put_failure;
1174
1175 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1176
1177 if (cfg->flags & VETH_OPT_PEER_NAME)
1178 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1179 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1180 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1181
1182 nla_nest_end(msg, veth_info);
1183 nla_nest_end(msg, data);
1184 nla_nest_end(msg, linkinfo);
1185
1186 rv = system_rtnl_call(msg);
1187 if (rv) {
1188 if (cfg->flags & VETH_OPT_PEER_NAME)
1189 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1190 else
1191 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1192 }
1193
1194 return rv;
1195
1196 nla_put_failure:
1197 nlmsg_free(msg);
1198 return -ENOMEM;
1199 }
1200
1201 int system_veth_del(struct device *veth)
1202 {
1203 return system_link_del(veth->ifname);
1204 }
1205
1206 static int system_vlan(struct device *dev, int id)
1207 {
1208 struct vlan_ioctl_args ifr = {
1209 .cmd = SET_VLAN_NAME_TYPE_CMD,
1210 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1211 };
1212
1213 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1214
1215 if (id < 0) {
1216 ifr.cmd = DEL_VLAN_CMD;
1217 ifr.u.VID = 0;
1218 } else {
1219 ifr.cmd = ADD_VLAN_CMD;
1220 ifr.u.VID = id;
1221 }
1222 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1223 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1224 }
1225
1226 int system_vlan_add(struct device *dev, int id)
1227 {
1228 return system_vlan(dev, id);
1229 }
1230
1231 int system_vlan_del(struct device *dev)
1232 {
1233 return system_vlan(dev, -1);
1234 }
1235
1236 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1237 {
1238 struct nl_msg *msg;
1239 struct nlattr *linkinfo, *data;
1240 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1241 int rv;
1242
1243 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1244
1245 if (!msg)
1246 return -1;
1247
1248 nlmsg_append(msg, &iim, sizeof(iim), 0);
1249 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1250 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1251
1252 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1253 goto nla_put_failure;
1254
1255 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1256
1257 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1258 goto nla_put_failure;
1259
1260 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1261
1262 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1263 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1264 #else
1265 if(cfg->proto == VLAN_PROTO_8021AD)
1266 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);
1267 #endif
1268
1269 nla_nest_end(msg, data);
1270 nla_nest_end(msg, linkinfo);
1271
1272 rv = system_rtnl_call(msg);
1273 if (rv)
1274 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1275
1276 return rv;
1277
1278 nla_put_failure:
1279 nlmsg_free(msg);
1280 return -ENOMEM;
1281 }
1282
1283 int system_vlandev_del(struct device *vlandev)
1284 {
1285 return system_link_del(vlandev->ifname);
1286 }
1287
1288 void
1289 system_if_get_settings(struct device *dev, struct device_settings *s)
1290 {
1291 struct ifreq ifr;
1292 char buf[10];
1293
1294 memset(&ifr, 0, sizeof(ifr));
1295 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1296
1297 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1298 s->mtu = ifr.ifr_mtu;
1299 s->flags |= DEV_OPT_MTU;
1300 }
1301
1302 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1303 if (s->mtu6 > 0)
1304 s->flags |= DEV_OPT_MTU6;
1305
1306 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1307 s->txqueuelen = ifr.ifr_qlen;
1308 s->flags |= DEV_OPT_TXQUEUELEN;
1309 }
1310
1311 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1312 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1313 s->flags |= DEV_OPT_MACADDR;
1314 }
1315
1316 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1317 s->ipv6 = !strtoul(buf, NULL, 0);
1318 s->flags |= DEV_OPT_IPV6;
1319 }
1320
1321 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1322 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1323 s->flags |= DEV_OPT_PROMISC;
1324
1325 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1326 s->flags |= DEV_OPT_MULTICAST;
1327 }
1328
1329 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1330 s->rpfilter = strtoul(buf, NULL, 0);
1331 s->flags |= DEV_OPT_RPFILTER;
1332 }
1333
1334 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1335 s->acceptlocal = strtoul(buf, NULL, 0);
1336 s->flags |= DEV_OPT_ACCEPTLOCAL;
1337 }
1338
1339 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1340 s->igmpversion = strtoul(buf, NULL, 0);
1341 s->flags |= DEV_OPT_IGMPVERSION;
1342 }
1343
1344 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1345 s->mldversion = strtoul(buf, NULL, 0);
1346 s->flags |= DEV_OPT_MLDVERSION;
1347 }
1348
1349 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1350 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1351 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1352 }
1353
1354 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1355 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1356 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1357 }
1358
1359 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1360 s->neigh4locktime = strtoul(buf, NULL, 0);
1361 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1362 }
1363
1364 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1365 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1366 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1367 }
1368
1369 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1370 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1371 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1372 }
1373
1374 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1375 s->dadtransmits = strtoul(buf, NULL, 0);
1376 s->flags |= DEV_OPT_DADTRANSMITS;
1377 }
1378
1379 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1380 s->sendredirects = strtoul(buf, NULL, 0);
1381 s->flags |= DEV_OPT_SENDREDIRECTS;
1382 }
1383 }
1384
1385 static void
1386 system_if_set_rps_xps_val(const char *path, int val)
1387 {
1388 char val_buf[8];
1389 glob_t gl;
1390 int i;
1391
1392 if (glob(path, 0, NULL, &gl))
1393 return;
1394
1395 snprintf(val_buf, sizeof(val_buf), "%x", val);
1396 for (i = 0; i < gl.gl_pathc; i++)
1397 system_set_sysctl(gl.gl_pathv[i], val_buf);
1398
1399 globfree(&gl);
1400 }
1401
1402 static void
1403 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1404 {
1405 long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1406 int val;
1407
1408 if (n_cpus < 2)
1409 return;
1410
1411 val = (1 << n_cpus) - 1;
1412 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1413 system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1414
1415 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1416 system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1417 }
1418
1419 void
1420 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1421 {
1422 struct ifreq ifr;
1423 char buf[12];
1424
1425 memset(&ifr, 0, sizeof(ifr));
1426 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1427 if (s->flags & DEV_OPT_MTU & apply_mask) {
1428 ifr.ifr_mtu = s->mtu;
1429 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1430 s->flags &= ~DEV_OPT_MTU;
1431 }
1432 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1433 system_update_ipv6_mtu(dev, s->mtu6);
1434 }
1435 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1436 ifr.ifr_qlen = s->txqueuelen;
1437 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1438 s->flags &= ~DEV_OPT_TXQUEUELEN;
1439 }
1440 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1441 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1442 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1443 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1444 s->flags &= ~DEV_OPT_MACADDR;
1445 }
1446 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1447 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1448 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1449 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1450 !s->promisc ? IFF_PROMISC : 0) < 0)
1451 s->flags &= ~DEV_OPT_PROMISC;
1452 }
1453 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1454 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1455 system_set_rpfilter(dev, buf);
1456 }
1457 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1458 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1459 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1460 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1461 system_set_igmpversion(dev, buf);
1462 }
1463 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1464 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1465 system_set_mldversion(dev, buf);
1466 }
1467 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1468 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1469 system_set_neigh4reachabletime(dev, buf);
1470 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1471 system_set_neigh6reachabletime(dev, buf);
1472 }
1473 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1474 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1475 system_set_neigh4locktime(dev, buf);
1476 }
1477 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1478 snprintf(buf, sizeof(buf), "%d", s->neigh4gcstaletime);
1479 system_set_neigh4gcstaletime(dev, buf);
1480 snprintf(buf, sizeof(buf), "%d", s->neigh6gcstaletime);
1481 system_set_neigh6gcstaletime(dev, buf);
1482 }
1483 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1484 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1485 system_set_dadtransmits(dev, buf);
1486 }
1487 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1488 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1489 !s->multicast ? IFF_MULTICAST : 0) < 0)
1490 s->flags &= ~DEV_OPT_MULTICAST;
1491 }
1492 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1493 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1494
1495 system_if_apply_rps_xps(dev, s);
1496 }
1497
1498 int system_if_up(struct device *dev)
1499 {
1500 system_if_get_settings(dev, &dev->orig_settings);
1501 /* Only keep orig settings based on what needs to be set */
1502 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1503 dev->orig_settings.flags &= dev->settings.flags;
1504 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1505 return system_if_flags(dev->ifname, IFF_UP, 0);
1506 }
1507
1508 int system_if_down(struct device *dev)
1509 {
1510 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1511 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1512 return ret;
1513 }
1514
1515 struct if_check_data {
1516 struct device *dev;
1517 int pending;
1518 int ret;
1519 };
1520
1521 #ifndef IFF_LOWER_UP
1522 #define IFF_LOWER_UP 0x10000
1523 #endif
1524
1525 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1526 {
1527 struct nlmsghdr *nh = nlmsg_hdr(msg);
1528 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1529 struct if_check_data *chk = (struct if_check_data *)arg;
1530
1531 if (nh->nlmsg_type != RTM_NEWLINK)
1532 return NL_SKIP;
1533
1534 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1535 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1536
1537 return NL_OK;
1538 }
1539
1540 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1541 {
1542 struct if_check_data *chk = (struct if_check_data *)arg;
1543 chk->pending = 0;
1544 return NL_STOP;
1545 }
1546
1547 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1548 {
1549 struct if_check_data *chk = (struct if_check_data *)arg;
1550
1551 device_set_present(chk->dev, false);
1552 device_set_link(chk->dev, false);
1553 chk->pending = err->error;
1554
1555 return NL_STOP;
1556 }
1557
1558 int system_if_check(struct device *dev)
1559 {
1560 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1561 struct nl_msg *msg;
1562 struct ifinfomsg ifi = {
1563 .ifi_family = AF_UNSPEC,
1564 .ifi_index = 0,
1565 };
1566 struct if_check_data chk = {
1567 .dev = dev,
1568 .pending = 1,
1569 };
1570 int ret = 1;
1571
1572 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1573 if (!msg)
1574 goto out;
1575
1576 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1577 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1578 goto free;
1579
1580 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1581 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1582 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1583
1584 nl_send_auto_complete(sock_rtnl, msg);
1585 while (chk.pending > 0)
1586 nl_recvmsgs(sock_rtnl, cb);
1587
1588 ret = chk.pending;
1589
1590 free:
1591 nlmsg_free(msg);
1592 out:
1593 nl_cb_put(cb);
1594 return ret;
1595 }
1596
1597 struct device *
1598 system_if_get_parent(struct device *dev)
1599 {
1600 char buf[64], *devname;
1601 int ifindex, iflink, len;
1602 FILE *f;
1603
1604 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1605 f = fopen(buf, "r");
1606 if (!f)
1607 return NULL;
1608
1609 len = fread(buf, 1, sizeof(buf) - 1, f);
1610 fclose(f);
1611
1612 if (len <= 0)
1613 return NULL;
1614
1615 buf[len] = 0;
1616 iflink = strtoul(buf, NULL, 0);
1617 ifindex = system_if_resolve(dev);
1618 if (!iflink || iflink == ifindex)
1619 return NULL;
1620
1621 devname = if_indextoname(iflink, buf);
1622 if (!devname)
1623 return NULL;
1624
1625 return device_get(devname, true);
1626 }
1627
1628 static bool
1629 read_string_file(int dir_fd, const char *file, char *buf, int len)
1630 {
1631 bool ret = false;
1632 char *c;
1633 int fd;
1634
1635 fd = openat(dir_fd, file, O_RDONLY);
1636 if (fd < 0)
1637 return false;
1638
1639 retry:
1640 len = read(fd, buf, len - 1);
1641 if (len < 0) {
1642 if (errno == EINTR)
1643 goto retry;
1644 } else if (len > 0) {
1645 buf[len] = 0;
1646
1647 c = strchr(buf, '\n');
1648 if (c)
1649 *c = 0;
1650
1651 ret = true;
1652 }
1653
1654 close(fd);
1655
1656 return ret;
1657 }
1658
1659 static bool
1660 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1661 {
1662 char buf[64];
1663 bool ret = false;
1664
1665 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1666 if (ret)
1667 *val = strtoull(buf, NULL, 0);
1668
1669 return ret;
1670 }
1671
1672 /* Assume advertised flags == supported flags */
1673 static const struct {
1674 uint32_t mask;
1675 const char *name;
1676 } ethtool_link_modes[] = {
1677 { ADVERTISED_10baseT_Half, "10H" },
1678 { ADVERTISED_10baseT_Full, "10F" },
1679 { ADVERTISED_100baseT_Half, "100H" },
1680 { ADVERTISED_100baseT_Full, "100F" },
1681 { ADVERTISED_1000baseT_Half, "1000H" },
1682 { ADVERTISED_1000baseT_Full, "1000F" },
1683 };
1684
1685 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1686 {
1687 int i;
1688 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1689 if (mask & ethtool_link_modes[i].mask)
1690 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1691 }
1692 }
1693
1694 bool
1695 system_if_force_external(const char *ifname)
1696 {
1697 char buf[64];
1698 struct stat s;
1699
1700 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1701 return stat(buf, &s) == 0;
1702 }
1703
1704 int
1705 system_if_dump_info(struct device *dev, struct blob_buf *b)
1706 {
1707 struct ethtool_cmd ecmd;
1708 struct ifreq ifr;
1709 char buf[64], *s;
1710 void *c;
1711 int dir_fd;
1712
1713 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1714 dir_fd = open(buf, O_DIRECTORY);
1715
1716 memset(&ecmd, 0, sizeof(ecmd));
1717 memset(&ifr, 0, sizeof(ifr));
1718 strcpy(ifr.ifr_name, dev->ifname);
1719 ifr.ifr_data = (caddr_t) &ecmd;
1720 ecmd.cmd = ETHTOOL_GSET;
1721
1722 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1723 c = blobmsg_open_array(b, "link-advertising");
1724 system_add_link_modes(b, ecmd.advertising);
1725 blobmsg_close_array(b, c);
1726
1727 c = blobmsg_open_array(b, "link-supported");
1728 system_add_link_modes(b, ecmd.supported);
1729 blobmsg_close_array(b, c);
1730
1731 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1732 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1733 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1734 blobmsg_add_string_buffer(b);
1735 }
1736
1737 close(dir_fd);
1738 return 0;
1739 }
1740
1741 int
1742 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1743 {
1744 const char *const counters[] = {
1745 "collisions", "rx_frame_errors", "tx_compressed",
1746 "multicast", "rx_length_errors", "tx_dropped",
1747 "rx_bytes", "rx_missed_errors", "tx_errors",
1748 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1749 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1750 "rx_dropped", "tx_aborted_errors", "tx_packets",
1751 "rx_errors", "tx_bytes", "tx_window_errors",
1752 "rx_fifo_errors", "tx_carrier_errors",
1753 };
1754 char buf[64];
1755 int stats_dir;
1756 int i;
1757 uint64_t val = 0;
1758
1759 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1760 stats_dir = open(buf, O_DIRECTORY);
1761 if (stats_dir < 0)
1762 return -1;
1763
1764 for (i = 0; i < ARRAY_SIZE(counters); i++)
1765 if (read_uint64_file(stats_dir, counters[i], &val))
1766 blobmsg_add_u64(b, counters[i], val);
1767
1768 close(stats_dir);
1769 return 0;
1770 }
1771
1772 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1773 {
1774 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1775 int alen = v4 ? 4 : 16;
1776 unsigned int flags = 0;
1777 struct ifaddrmsg ifa = {
1778 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1779 .ifa_prefixlen = addr->mask,
1780 .ifa_index = dev->ifindex,
1781 };
1782
1783 struct nl_msg *msg;
1784 if (cmd == RTM_NEWADDR)
1785 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1786
1787 msg = nlmsg_alloc_simple(cmd, flags);
1788 if (!msg)
1789 return -1;
1790
1791 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1792 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1793 if (v4) {
1794 if (addr->broadcast)
1795 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1796 if (addr->point_to_point)
1797 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1798 } else {
1799 time_t now = system_get_rtime();
1800 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1801
1802 if (addr->preferred_until) {
1803 int64_t preferred = addr->preferred_until - now;
1804 if (preferred < 0)
1805 preferred = 0;
1806 else if (preferred > UINT32_MAX)
1807 preferred = UINT32_MAX;
1808
1809 cinfo.ifa_prefered = preferred;
1810 }
1811
1812 if (addr->valid_until) {
1813 int64_t valid = addr->valid_until - now;
1814 if (valid <= 0) {
1815 nlmsg_free(msg);
1816 return -1;
1817 }
1818 else if (valid > UINT32_MAX)
1819 valid = UINT32_MAX;
1820
1821 cinfo.ifa_valid = valid;
1822 }
1823
1824 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1825
1826 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1827 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1828 }
1829
1830 return system_rtnl_call(msg);
1831 }
1832
1833 int system_add_address(struct device *dev, struct device_addr *addr)
1834 {
1835 return system_addr(dev, addr, RTM_NEWADDR);
1836 }
1837
1838 int system_del_address(struct device *dev, struct device_addr *addr)
1839 {
1840 return system_addr(dev, addr, RTM_DELADDR);
1841 }
1842
1843 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1844 {
1845 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1846 bool have_gw;
1847 unsigned int flags = 0;
1848
1849 if (alen == 4)
1850 have_gw = !!route->nexthop.in.s_addr;
1851 else
1852 have_gw = route->nexthop.in6.s6_addr32[0] ||
1853 route->nexthop.in6.s6_addr32[1] ||
1854 route->nexthop.in6.s6_addr32[2] ||
1855 route->nexthop.in6.s6_addr32[3];
1856
1857 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1858 ? route->table : RT_TABLE_MAIN;
1859
1860 struct rtmsg rtm = {
1861 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1862 .rtm_dst_len = route->mask,
1863 .rtm_src_len = route->sourcemask,
1864 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1865 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1866 .rtm_scope = RT_SCOPE_NOWHERE,
1867 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1868 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1869 };
1870 struct nl_msg *msg;
1871
1872 if (cmd == RTM_NEWROUTE) {
1873 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1874
1875 if (!dev) { // Add null-route
1876 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1877 rtm.rtm_type = RTN_UNREACHABLE;
1878 }
1879 else
1880 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1881 }
1882
1883 if (route->flags & DEVROUTE_TYPE) {
1884 rtm.rtm_type = route->type;
1885 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1886 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1887 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1888 rtm.rtm_table = RT_TABLE_LOCAL;
1889 }
1890
1891 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1892 rtm.rtm_scope = RT_SCOPE_HOST;
1893 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1894 rtm.rtm_type == RTN_ANYCAST) {
1895 rtm.rtm_scope = RT_SCOPE_LINK;
1896 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1897 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1898 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1899 dev = NULL;
1900 }
1901 }
1902
1903 msg = nlmsg_alloc_simple(cmd, flags);
1904 if (!msg)
1905 return -1;
1906
1907 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1908
1909 if (route->mask)
1910 nla_put(msg, RTA_DST, alen, &route->addr);
1911
1912 if (route->sourcemask) {
1913 if (rtm.rtm_family == AF_INET)
1914 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1915 else
1916 nla_put(msg, RTA_SRC, alen, &route->source);
1917 }
1918
1919 if (route->metric > 0)
1920 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1921
1922 if (have_gw)
1923 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1924
1925 if (dev)
1926 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1927
1928 if (table >= 256)
1929 nla_put_u32(msg, RTA_TABLE, table);
1930
1931 if (route->flags & DEVROUTE_MTU) {
1932 struct nlattr *metrics;
1933
1934 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1935 goto nla_put_failure;
1936
1937 nla_put_u32(msg, RTAX_MTU, route->mtu);
1938
1939 nla_nest_end(msg, metrics);
1940 }
1941
1942 return system_rtnl_call(msg);
1943
1944 nla_put_failure:
1945 nlmsg_free(msg);
1946 return -ENOMEM;
1947 }
1948
1949 int system_add_route(struct device *dev, struct device_route *route)
1950 {
1951 return system_rt(dev, route, RTM_NEWROUTE);
1952 }
1953
1954 int system_del_route(struct device *dev, struct device_route *route)
1955 {
1956 return system_rt(dev, route, RTM_DELROUTE);
1957 }
1958
1959 int system_flush_routes(void)
1960 {
1961 const char *names[] = {
1962 "/proc/sys/net/ipv4/route/flush",
1963 "/proc/sys/net/ipv6/route/flush"
1964 };
1965 int fd, i;
1966
1967 for (i = 0; i < ARRAY_SIZE(names); i++) {
1968 fd = open(names[i], O_WRONLY);
1969 if (fd < 0)
1970 continue;
1971
1972 if (write(fd, "-1", 2)) {}
1973 close(fd);
1974 }
1975 return 0;
1976 }
1977
1978 bool system_resolve_rt_type(const char *type, unsigned int *id)
1979 {
1980 return system_rtn_aton(type, id);
1981 }
1982
1983 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1984 {
1985 FILE *f;
1986 char *e, buf[128];
1987 unsigned int n, proto = 256;
1988
1989 if ((n = strtoul(type, &e, 0)) >= 0 && !*e && e != type)
1990 proto = n;
1991 else if (!strcmp(type, "unspec"))
1992 proto = RTPROT_UNSPEC;
1993 else if (!strcmp(type, "kernel"))
1994 proto = RTPROT_KERNEL;
1995 else if (!strcmp(type, "boot"))
1996 proto = RTPROT_BOOT;
1997 else if (!strcmp(type, "static"))
1998 proto = RTPROT_STATIC;
1999 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2000 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2001 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2002 continue;
2003
2004 n = strtoul(e, NULL, 10);
2005 e = strtok(NULL, " \t\n");
2006
2007 if (e && !strcmp(e, type)) {
2008 proto = n;
2009 break;
2010 }
2011 }
2012 fclose(f);
2013 }
2014
2015 if (proto > 255)
2016 return false;
2017
2018 *id = proto;
2019 return true;
2020 }
2021
2022 bool system_resolve_rt_table(const char *name, unsigned int *id)
2023 {
2024 FILE *f;
2025 char *e, buf[128];
2026 unsigned int n, table = RT_TABLE_UNSPEC;
2027
2028 /* first try to parse table as number */
2029 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2030 table = n;
2031
2032 /* handle well known aliases */
2033 else if (!strcmp(name, "default"))
2034 table = RT_TABLE_DEFAULT;
2035 else if (!strcmp(name, "main"))
2036 table = RT_TABLE_MAIN;
2037 else if (!strcmp(name, "local"))
2038 table = RT_TABLE_LOCAL;
2039
2040 /* try to look up name in /etc/iproute2/rt_tables */
2041 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2042 {
2043 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2044 {
2045 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2046 continue;
2047
2048 n = strtoul(e, NULL, 10);
2049 e = strtok(NULL, " \t\n");
2050
2051 if (e && !strcmp(e, name))
2052 {
2053 table = n;
2054 break;
2055 }
2056 }
2057
2058 fclose(f);
2059 }
2060
2061 if (table == RT_TABLE_UNSPEC)
2062 return false;
2063
2064 *id = table;
2065 return true;
2066 }
2067
2068 bool system_is_default_rt_table(unsigned int id)
2069 {
2070 return (id == RT_TABLE_MAIN);
2071 }
2072
2073 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2074 {
2075 char *e;
2076 unsigned int n;
2077
2078 if (!strcmp(filter, "strict"))
2079 n = 1;
2080 else if (!strcmp(filter, "loose"))
2081 n = 2;
2082 else {
2083 n = strtoul(filter, &e, 0);
2084 if (*e || e == filter || n > 2)
2085 return false;
2086 }
2087
2088 *id = n;
2089 return true;
2090 }
2091
2092 static int system_iprule(struct iprule *rule, int cmd)
2093 {
2094 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2095
2096 struct nl_msg *msg;
2097 struct rtmsg rtm = {
2098 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2099 .rtm_protocol = RTPROT_STATIC,
2100 .rtm_scope = RT_SCOPE_UNIVERSE,
2101 .rtm_table = RT_TABLE_UNSPEC,
2102 .rtm_type = RTN_UNSPEC,
2103 .rtm_flags = 0,
2104 };
2105
2106 if (cmd == RTM_NEWRULE)
2107 rtm.rtm_type = RTN_UNICAST;
2108
2109 if (rule->invert)
2110 rtm.rtm_flags |= FIB_RULE_INVERT;
2111
2112 if (rule->flags & IPRULE_SRC)
2113 rtm.rtm_src_len = rule->src_mask;
2114
2115 if (rule->flags & IPRULE_DEST)
2116 rtm.rtm_dst_len = rule->dest_mask;
2117
2118 if (rule->flags & IPRULE_TOS)
2119 rtm.rtm_tos = rule->tos;
2120
2121 if (rule->flags & IPRULE_LOOKUP) {
2122 if (rule->lookup < 256)
2123 rtm.rtm_table = rule->lookup;
2124 }
2125
2126 if (rule->flags & IPRULE_ACTION)
2127 rtm.rtm_type = rule->action;
2128 else if (rule->flags & IPRULE_GOTO)
2129 rtm.rtm_type = FR_ACT_GOTO;
2130 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2131 rtm.rtm_type = FR_ACT_NOP;
2132
2133 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2134
2135 if (!msg)
2136 return -1;
2137
2138 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2139
2140 if (rule->flags & IPRULE_IN)
2141 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2142
2143 if (rule->flags & IPRULE_OUT)
2144 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2145
2146 if (rule->flags & IPRULE_SRC)
2147 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2148
2149 if (rule->flags & IPRULE_DEST)
2150 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2151
2152 if (rule->flags & IPRULE_PRIORITY)
2153 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2154 else if (cmd == RTM_NEWRULE)
2155 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2156
2157 if (rule->flags & IPRULE_FWMARK)
2158 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2159
2160 if (rule->flags & IPRULE_FWMASK)
2161 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2162
2163 if (rule->flags & IPRULE_LOOKUP) {
2164 if (rule->lookup >= 256)
2165 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2166 }
2167
2168 if (rule->flags & IPRULE_GOTO)
2169 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2170
2171 return system_rtnl_call(msg);
2172 }
2173
2174 int system_add_iprule(struct iprule *rule)
2175 {
2176 return system_iprule(rule, RTM_NEWRULE);
2177 }
2178
2179 int system_del_iprule(struct iprule *rule)
2180 {
2181 return system_iprule(rule, RTM_DELRULE);
2182 }
2183
2184 int system_flush_iprules(void)
2185 {
2186 int rv = 0;
2187 struct iprule rule;
2188
2189 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2190 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2191
2192 memset(&rule, 0, sizeof(rule));
2193
2194
2195 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2196
2197 rule.priority = 0;
2198 rule.lookup = RT_TABLE_LOCAL;
2199 rv |= system_iprule(&rule, RTM_NEWRULE);
2200
2201 rule.priority = 32766;
2202 rule.lookup = RT_TABLE_MAIN;
2203 rv |= system_iprule(&rule, RTM_NEWRULE);
2204
2205 rule.priority = 32767;
2206 rule.lookup = RT_TABLE_DEFAULT;
2207 rv |= system_iprule(&rule, RTM_NEWRULE);
2208
2209
2210 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2211
2212 rule.priority = 0;
2213 rule.lookup = RT_TABLE_LOCAL;
2214 rv |= system_iprule(&rule, RTM_NEWRULE);
2215
2216 rule.priority = 32766;
2217 rule.lookup = RT_TABLE_MAIN;
2218 rv |= system_iprule(&rule, RTM_NEWRULE);
2219
2220 return rv;
2221 }
2222
2223 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2224 {
2225 return system_rtn_aton(action, id);
2226 }
2227
2228 time_t system_get_rtime(void)
2229 {
2230 struct timespec ts;
2231 struct timeval tv;
2232
2233 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2234 return ts.tv_sec;
2235
2236 if (gettimeofday(&tv, NULL) == 0)
2237 return tv.tv_sec;
2238
2239 return 0;
2240 }
2241
2242 #ifndef IP_DF
2243 #define IP_DF 0x4000
2244 #endif
2245
2246 static int tunnel_ioctl(const char *name, int cmd, void *p)
2247 {
2248 struct ifreq ifr;
2249
2250 memset(&ifr, 0, sizeof(ifr));
2251 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2252 ifr.ifr_ifru.ifru_data = p;
2253 return ioctl(sock_ioctl, cmd, &ifr);
2254 }
2255
2256 #ifdef IFLA_IPTUN_MAX
2257 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2258 static int system_add_gre_tunnel(const char *name, const char *kind,
2259 const unsigned int link, struct blob_attr **tb, bool v6)
2260 {
2261 struct nl_msg *nlm;
2262 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2263 struct blob_attr *cur;
2264 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2265 uint16_t iflags = 0, oflags = 0;
2266 uint8_t tos = 0;
2267 int ret = 0, ttl = 0;
2268
2269 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2270 if (!nlm)
2271 return -1;
2272
2273 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2274 nla_put_string(nlm, IFLA_IFNAME, name);
2275
2276 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2277 if (!linkinfo) {
2278 ret = -ENOMEM;
2279 goto failure;
2280 }
2281
2282 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2283 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2284 if (!infodata) {
2285 ret = -ENOMEM;
2286 goto failure;
2287 }
2288
2289 if (link)
2290 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2291
2292 if ((cur = tb[TUNNEL_ATTR_TTL]))
2293 ttl = blobmsg_get_u32(cur);
2294
2295 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2296 char *str = blobmsg_get_string(cur);
2297 if (strcmp(str, "inherit")) {
2298 unsigned uval;
2299
2300 if (!system_tos_aton(str, &uval)) {
2301 ret = -EINVAL;
2302 goto failure;
2303 }
2304
2305 if (v6)
2306 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2307 else
2308 tos = uval;
2309 } else {
2310 if (v6)
2311 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2312 else
2313 tos = 1;
2314 }
2315 }
2316
2317 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2318 uint8_t icsum, ocsum, iseqno, oseqno;
2319 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2320 &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2321 ret = -EINVAL;
2322 goto failure;
2323 }
2324
2325 if (ikey)
2326 iflags |= GRE_KEY;
2327
2328 if (okey)
2329 oflags |= GRE_KEY;
2330
2331 if (icsum)
2332 iflags |= GRE_CSUM;
2333
2334 if (ocsum)
2335 oflags |= GRE_CSUM;
2336
2337 if (iseqno)
2338 iflags |= GRE_SEQ;
2339
2340 if (oseqno)
2341 oflags |= GRE_SEQ;
2342 }
2343
2344 if (v6) {
2345 struct in6_addr in6buf;
2346 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2347 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2348 ret = -EINVAL;
2349 goto failure;
2350 }
2351 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2352 }
2353
2354 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2355 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2356 ret = -EINVAL;
2357 goto failure;
2358 }
2359 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2360 }
2361 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2362
2363 if (flowinfo)
2364 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2365
2366 if (flags)
2367 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2368
2369 if (!ttl)
2370 ttl = 64;
2371 } else {
2372 struct in_addr inbuf;
2373 bool set_df = true;
2374
2375 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2376 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2377 ret = -EINVAL;
2378 goto failure;
2379 }
2380 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2381 }
2382
2383 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2384 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2385 ret = -EINVAL;
2386 goto failure;
2387 }
2388 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2389
2390 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2391 if (!okey) {
2392 okey = inbuf.s_addr;
2393 oflags |= GRE_KEY;
2394 }
2395
2396 if (!ikey) {
2397 ikey = inbuf.s_addr;
2398 iflags |= GRE_KEY;
2399 }
2400 }
2401 }
2402
2403 if ((cur = tb[TUNNEL_ATTR_DF]))
2404 set_df = blobmsg_get_bool(cur);
2405
2406 if (!set_df) {
2407 /* ttl != 0 and nopmtudisc are incompatible */
2408 if (ttl) {
2409 ret = -EINVAL;
2410 goto failure;
2411 }
2412 } else if (!ttl)
2413 ttl = 64;
2414
2415 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2416
2417 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2418 }
2419
2420 if (ttl)
2421 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2422
2423 if (oflags)
2424 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2425
2426 if (iflags)
2427 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2428
2429 if (okey)
2430 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2431
2432 if (ikey)
2433 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2434
2435 nla_nest_end(nlm, infodata);
2436 nla_nest_end(nlm, linkinfo);
2437
2438 return system_rtnl_call(nlm);
2439
2440 failure:
2441 nlmsg_free(nlm);
2442 return ret;
2443 }
2444 #endif
2445
2446 #ifdef IFLA_VTI_MAX
2447 static int system_add_vti_tunnel(const char *name, const char *kind,
2448 const unsigned int link, struct blob_attr **tb, bool v6)
2449 {
2450 struct nl_msg *nlm;
2451 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2452 struct blob_attr *cur;
2453 uint32_t ikey = 0, okey = 0;
2454 int ret = 0;
2455
2456 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2457 if (!nlm)
2458 return -1;
2459
2460 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2461 nla_put_string(nlm, IFLA_IFNAME, name);
2462
2463 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2464 if (!linkinfo) {
2465 ret = -ENOMEM;
2466 goto failure;
2467 }
2468
2469 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2470 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2471 if (!infodata) {
2472 ret = -ENOMEM;
2473 goto failure;
2474 }
2475
2476 if (link)
2477 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2478
2479 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2480 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2481 &ikey, &okey) < 2) {
2482 ret = -EINVAL;
2483 goto failure;
2484 }
2485 }
2486
2487 if (v6) {
2488 struct in6_addr in6buf;
2489 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2490 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2491 ret = -EINVAL;
2492 goto failure;
2493 }
2494 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2495 }
2496
2497 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2498 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2499 ret = -EINVAL;
2500 goto failure;
2501 }
2502 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2503 }
2504
2505 } else {
2506 struct in_addr inbuf;
2507
2508 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2509 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2510 ret = -EINVAL;
2511 goto failure;
2512 }
2513 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2514 }
2515
2516 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2517 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2518 ret = -EINVAL;
2519 goto failure;
2520 }
2521 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2522 }
2523
2524 }
2525
2526 if (okey)
2527 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2528
2529 if (ikey)
2530 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2531
2532 nla_nest_end(nlm, infodata);
2533 nla_nest_end(nlm, linkinfo);
2534
2535 return system_rtnl_call(nlm);
2536
2537 failure:
2538 nlmsg_free(nlm);
2539 return ret;
2540 }
2541 #endif
2542
2543 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2544 {
2545 struct blob_attr *cur;
2546 bool set_df = true;
2547 struct ip_tunnel_parm p = {
2548 .link = link,
2549 .iph = {
2550 .version = 4,
2551 .ihl = 5,
2552 .protocol = proto,
2553 }
2554 };
2555
2556 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2557 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2558 return -EINVAL;
2559
2560 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2561 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2562 return -EINVAL;
2563
2564 if ((cur = tb[TUNNEL_ATTR_DF]))
2565 set_df = blobmsg_get_bool(cur);
2566
2567 if ((cur = tb[TUNNEL_ATTR_TTL]))
2568 p.iph.ttl = blobmsg_get_u32(cur);
2569
2570 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2571 char *str = blobmsg_get_string(cur);
2572 if (strcmp(str, "inherit")) {
2573 unsigned uval;
2574
2575 if (!system_tos_aton(str, &uval))
2576 return -EINVAL;
2577
2578 p.iph.tos = uval;
2579 } else
2580 p.iph.tos = 1;
2581 }
2582
2583 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2584 /* ttl !=0 and nopmtudisc are incompatible */
2585 if (p.iph.ttl && p.iph.frag_off == 0)
2586 return -EINVAL;
2587
2588 strncpy(p.name, name, sizeof(p.name));
2589
2590 switch (p.iph.protocol) {
2591 case IPPROTO_IPIP:
2592 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2593 case IPPROTO_IPV6:
2594 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2595 default:
2596 break;
2597 }
2598 return -1;
2599 }
2600
2601 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2602 {
2603 struct blob_attr *cur;
2604 const char *str;
2605
2606 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2607 return -EINVAL;
2608 str = blobmsg_data(cur);
2609
2610 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2611 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2612 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6"))
2613 return system_link_del(name);
2614 else
2615 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2616 }
2617
2618 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2619 {
2620 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2621
2622 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2623 blob_data(attr), blob_len(attr));
2624
2625 return __system_del_ip_tunnel(name, tb);
2626 }
2627
2628 int system_update_ipv6_mtu(struct device *dev, int mtu)
2629 {
2630 int ret = -1;
2631 char buf[64];
2632 int fd;
2633
2634 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2635 dev->ifname);
2636
2637 fd = open(buf, O_RDWR);
2638 if (fd < 0)
2639 return ret;
2640
2641 if (!mtu) {
2642 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2643 if (len < 0)
2644 goto out;
2645
2646 buf[len] = 0;
2647 ret = atoi(buf);
2648 } else {
2649 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2650 ret = mtu;
2651 }
2652
2653 out:
2654 close(fd);
2655 return ret;
2656 }
2657
2658 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2659 {
2660 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2661 struct blob_attr *cur;
2662 const char *str;
2663
2664 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2665 blob_data(attr), blob_len(attr));
2666
2667 __system_del_ip_tunnel(name, tb);
2668
2669 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2670 return -EINVAL;
2671 str = blobmsg_data(cur);
2672
2673 unsigned int ttl = 0;
2674 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2675 ttl = blobmsg_get_u32(cur);
2676 if (ttl > 255)
2677 return -EINVAL;
2678 }
2679
2680 unsigned int link = 0;
2681 if ((cur = tb[TUNNEL_ATTR_LINK])) {
2682 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2683 if (!iface)
2684 return -EINVAL;
2685
2686 if (iface->l3_dev.dev)
2687 link = iface->l3_dev.dev->ifindex;
2688 }
2689
2690 if (!strcmp(str, "sit")) {
2691 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2692 return -1;
2693
2694 #ifdef SIOCADD6RD
2695 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2696 unsigned int mask;
2697 struct ip_tunnel_6rd p6;
2698
2699 memset(&p6, 0, sizeof(p6));
2700
2701 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2702 &p6.prefix, &mask) || mask > 128)
2703 return -EINVAL;
2704 p6.prefixlen = mask;
2705
2706 if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2707 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2708 &p6.relay_prefix, &mask) || mask > 32)
2709 return -EINVAL;
2710 p6.relay_prefixlen = mask;
2711 }
2712
2713 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2714 __system_del_ip_tunnel(name, tb);
2715 return -1;
2716 }
2717 }
2718 #endif
2719 #ifdef IFLA_IPTUN_MAX
2720 } else if (!strcmp(str, "ipip6")) {
2721 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2722 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2723 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2724 int ret = 0;
2725
2726 if (!nlm)
2727 return -1;
2728
2729 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2730 nla_put_string(nlm, IFLA_IFNAME, name);
2731
2732 if (link)
2733 nla_put_u32(nlm, IFLA_LINK, link);
2734
2735 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2736 if (!linkinfo) {
2737 ret = -ENOMEM;
2738 goto failure;
2739 }
2740 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2741 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2742 if (!infodata) {
2743 ret = -ENOMEM;
2744 goto failure;
2745 }
2746
2747 if (link)
2748 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2749
2750 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2751 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2752 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2753
2754 struct in6_addr in6buf;
2755 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2756 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2757 ret = -EINVAL;
2758 goto failure;
2759 }
2760 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2761 }
2762
2763 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2764 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2765 ret = -EINVAL;
2766 goto failure;
2767 }
2768 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2769 }
2770
2771 #ifdef IFLA_IPTUN_FMR_MAX
2772 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2773 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2774
2775 struct blob_attr *fmr;
2776 unsigned rem, fmrcnt = 0;
2777 blobmsg_for_each_attr(fmr, cur, rem) {
2778 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2779 continue;
2780
2781 unsigned ip4len, ip6len, ealen, offset = 6;
2782 char ip6buf[48];
2783 char ip4buf[16];
2784
2785 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2786 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2787 ret = -EINVAL;
2788 goto failure;
2789 }
2790
2791 struct in6_addr ip6prefix;
2792 struct in_addr ip4prefix;
2793 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2794 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2795 ret = -EINVAL;
2796 goto failure;
2797 }
2798
2799 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2800
2801 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2802 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2803 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2804 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2805 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2806 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2807
2808 nla_nest_end(nlm, rule);
2809 }
2810
2811 nla_nest_end(nlm, fmrs);
2812 }
2813 #endif
2814
2815 nla_nest_end(nlm, infodata);
2816 nla_nest_end(nlm, linkinfo);
2817
2818 return system_rtnl_call(nlm);
2819 failure:
2820 nlmsg_free(nlm);
2821 return ret;
2822 } else if (!strcmp(str, "greip")) {
2823 return system_add_gre_tunnel(name, "gre", link, tb, false);
2824 } else if (!strcmp(str, "gretapip")) {
2825 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2826 } else if (!strcmp(str, "greip6")) {
2827 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2828 } else if (!strcmp(str, "gretapip6")) {
2829 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2830 #ifdef IFLA_VTI_MAX
2831 } else if (!strcmp(str, "vtiip")) {
2832 return system_add_vti_tunnel(name, "vti", link, tb, false);
2833 } else if (!strcmp(str, "vtiip6")) {
2834 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2835 #endif
2836 #endif
2837 } else if (!strcmp(str, "ipip")) {
2838 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2839 }
2840 else
2841 return -EINVAL;
2842
2843 return 0;
2844 }
OpenWrt Network interface configuration daemon