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system-linux: improve handling of device rename
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19 #define _GNU_SOURCE
20
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/stat.h>
24 #include <sys/syscall.h>
25
26 #include <net/if.h>
27 #include <net/if_arp.h>
28
29 #include <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/ether.h>
32 #include <netinet/in.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #ifndef RTN_FAILED_POLICY
52 #define RTN_FAILED_POLICY 12
53 #endif
54
55 #ifndef IFA_F_NOPREFIXROUTE
56 #define IFA_F_NOPREFIXROUTE 0x200
57 #endif
58
59 #ifndef IFA_FLAGS
60 #define IFA_FLAGS (IFA_MULTICAST + 1)
61 #endif
62
63 #include <string.h>
64 #include <fcntl.h>
65 #include <glob.h>
66 #include <time.h>
67 #include <unistd.h>
68
69 #include <netlink/msg.h>
70 #include <netlink/attr.h>
71 #include <netlink/socket.h>
72 #include <libubox/uloop.h>
73
74 #include "netifd.h"
75 #include "device.h"
76 #include "system.h"
77 #include "utils.h"
78
79 struct event_socket {
80 struct uloop_fd uloop;
81 struct nl_sock *sock;
82 int bufsize;
83 };
84
85 static int sock_ioctl = -1;
86 static struct nl_sock *sock_rtnl = NULL;
87
88 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
89 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
90 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
91 const unsigned int link, struct blob_attr **tb);
92 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
93
94 static char dev_buf[256];
95
96 static void
97 handler_nl_event(struct uloop_fd *u, unsigned int events)
98 {
99 struct event_socket *ev = container_of(u, struct event_socket, uloop);
100 int err;
101 socklen_t errlen = sizeof(err);
102
103 if (!u->error) {
104 nl_recvmsgs_default(ev->sock);
105 return;
106 }
107
108 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
109 goto abort;
110
111 switch(err) {
112 case ENOBUFS:
113 /* Increase rx buffer size on netlink socket */
114 ev->bufsize *= 2;
115 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
116 goto abort;
117
118 /* Request full dump since some info got dropped */
119 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
120 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
121 break;
122
123 default:
124 goto abort;
125 }
126 u->error = false;
127 return;
128
129 abort:
130 uloop_fd_delete(&ev->uloop);
131 return;
132 }
133
134 static struct nl_sock *
135 create_socket(int protocol, int groups)
136 {
137 struct nl_sock *sock;
138
139 sock = nl_socket_alloc();
140 if (!sock)
141 return NULL;
142
143 if (groups)
144 nl_join_groups(sock, groups);
145
146 if (nl_connect(sock, protocol)) {
147 nl_socket_free(sock);
148 return NULL;
149 }
150
151 return sock;
152 }
153
154 static bool
155 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
156 uloop_fd_handler cb, int flags)
157 {
158 ev->sock = create_socket(protocol, groups);
159 if (!ev->sock)
160 return false;
161
162 ev->uloop.fd = nl_socket_get_fd(ev->sock);
163 ev->uloop.cb = cb;
164 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
165 return false;
166
167 return true;
168 }
169
170 static bool
171 create_event_socket(struct event_socket *ev, int protocol,
172 int (*cb)(struct nl_msg *msg, void *arg))
173 {
174 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
175 return false;
176
177 /* Install the valid custom callback handler */
178 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
179
180 /* Disable sequence number checking on event sockets */
181 nl_socket_disable_seq_check(ev->sock);
182
183 /* Increase rx buffer size to 65K on event sockets */
184 ev->bufsize = 65535;
185 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
186 return false;
187
188 return true;
189 }
190
191 static bool
192 create_hotplug_event_socket(struct event_socket *ev, int protocol,
193 void (*cb)(struct uloop_fd *u, unsigned int events))
194 {
195 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
196 return false;
197
198 /* Increase rx buffer size to 65K on event sockets */
199 ev->bufsize = 65535;
200 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
201 return false;
202
203 return true;
204 }
205
206 static bool
207 system_rtn_aton(const char *src, unsigned int *dst)
208 {
209 char *e;
210 unsigned int n;
211
212 if (!strcmp(src, "local"))
213 n = RTN_LOCAL;
214 else if (!strcmp(src, "nat"))
215 n = RTN_NAT;
216 else if (!strcmp(src, "broadcast"))
217 n = RTN_BROADCAST;
218 else if (!strcmp(src, "anycast"))
219 n = RTN_ANYCAST;
220 else if (!strcmp(src, "multicast"))
221 n = RTN_MULTICAST;
222 else if (!strcmp(src, "prohibit"))
223 n = RTN_PROHIBIT;
224 else if (!strcmp(src, "unreachable"))
225 n = RTN_UNREACHABLE;
226 else if (!strcmp(src, "blackhole"))
227 n = RTN_BLACKHOLE;
228 else if (!strcmp(src, "xresolve"))
229 n = RTN_XRESOLVE;
230 else if (!strcmp(src, "unicast"))
231 n = RTN_UNICAST;
232 else if (!strcmp(src, "throw"))
233 n = RTN_THROW;
234 else if (!strcmp(src, "failed_policy"))
235 n = RTN_FAILED_POLICY;
236 else {
237 n = strtoul(src, &e, 0);
238 if (!e || *e || e == src || n > 255)
239 return false;
240 }
241
242 *dst = n;
243 return true;
244 }
245
246 static bool
247 system_tos_aton(const char *src, unsigned *dst)
248 {
249 char *e;
250
251 *dst = strtoul(src, &e, 16);
252 if (e == src || *e || *dst > 255)
253 return false;
254
255 return true;
256 }
257
258 int system_init(void)
259 {
260 static struct event_socket rtnl_event;
261 static struct event_socket hotplug_event;
262
263 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
264 system_fd_set_cloexec(sock_ioctl);
265
266 /* Prepare socket for routing / address control */
267 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
268 if (!sock_rtnl)
269 return -1;
270
271 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
272 return -1;
273
274 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
275 handle_hotplug_event))
276 return -1;
277
278 /* Receive network link events form kernel */
279 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
280
281 return 0;
282 }
283
284 static void system_set_sysctl(const char *path, const char *val)
285 {
286 int fd;
287
288 fd = open(path, O_WRONLY);
289 if (fd < 0)
290 return;
291
292 if (write(fd, val, strlen(val))) {}
293 close(fd);
294 }
295
296 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
297 {
298 snprintf(dev_buf, sizeof(dev_buf), path, device);
299 system_set_sysctl(dev_buf, val);
300 }
301
302 static void system_set_disable_ipv6(struct device *dev, const char *val)
303 {
304 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
305 }
306
307 static void system_set_rpfilter(struct device *dev, const char *val)
308 {
309 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
310 }
311
312 static void system_set_acceptlocal(struct device *dev, const char *val)
313 {
314 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
315 }
316
317 static void system_set_igmpversion(struct device *dev, const char *val)
318 {
319 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
320 }
321
322 static void system_set_mldversion(struct device *dev, const char *val)
323 {
324 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
325 }
326
327 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
328 {
329 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
330 }
331
332 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
333 {
334 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
335 }
336
337 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
338 {
339 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
340 }
341
342 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
343 {
344 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
345 }
346
347 static void system_set_neigh4locktime(struct device *dev, const char *val)
348 {
349 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
350 }
351
352 static void system_set_dadtransmits(struct device *dev, const char *val)
353 {
354 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
355 }
356
357 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
358 {
359 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
360 }
361
362 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
363 {
364 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
365 }
366
367 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
368 {
369 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
370 }
371
372 static void system_bridge_set_isolated(struct device *dev, const char *val)
373 {
374 system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val);
375 }
376
377 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
378 {
379 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
380 "/sys/class/net/%s/brport/multicast_router",
381 dev->ifname, val);
382 }
383
384 static void system_bridge_set_robustness(struct device *dev, const char *val)
385 {
386 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
387 dev->ifname, val);
388 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
389 dev->ifname, val);
390 }
391
392 static void system_bridge_set_query_interval(struct device *dev, const char *val)
393 {
394 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
395 dev->ifname, val);
396 }
397
398 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
399 {
400 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
401 dev->ifname, val);
402 }
403
404 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
405 {
406 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
407 dev->ifname, val);
408 }
409
410 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
411 {
412 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
413 dev->ifname, val);
414 }
415
416 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
417 {
418 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
419 dev->ifname, val);
420 }
421
422 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
423 {
424 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
425 dev->ifname, val);
426 }
427
428 static void system_bridge_set_stp_state(struct device *dev, const char *val)
429 {
430 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/stp_state", dev->ifname, val);
431 }
432
433 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
434 {
435 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/forward_delay", dev->ifname, val);
436 }
437
438 static void system_bridge_set_priority(struct device *dev, const char *val)
439 {
440 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/priority", dev->ifname, val);
441 }
442
443 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
444 {
445 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/ageing_time", dev->ifname, val);
446 }
447
448 static void system_bridge_set_hello_time(struct device *dev, const char *val)
449 {
450 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hello_time", dev->ifname, val);
451 }
452
453 static void system_bridge_set_max_age(struct device *dev, const char *val)
454 {
455 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/max_age", dev->ifname, val);
456 }
457
458 static void system_bridge_set_learning(struct device *dev, const char *val)
459 {
460 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
461 }
462
463 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
464 {
465 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
466 }
467
468 static void system_set_sendredirects(struct device *dev, const char *val)
469 {
470 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
471 }
472
473 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
474 {
475 int fd = -1, ret = -1;
476
477 fd = open(path, O_RDONLY);
478 if (fd < 0)
479 goto out;
480
481 ssize_t len = read(fd, buf, buf_sz - 1);
482 if (len < 0)
483 goto out;
484
485 ret = buf[len] = 0;
486
487 out:
488 if (fd >= 0)
489 close(fd);
490
491 return ret;
492 }
493
494 static int
495 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
496 {
497 snprintf(dev_buf, sizeof(dev_buf), path, device);
498 return system_get_sysctl(dev_buf, buf, buf_sz);
499 }
500
501 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
502 {
503 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
504 dev->ifname, buf, buf_sz);
505 }
506
507 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
508 {
509 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
510 dev->ifname, buf, buf_sz);
511 }
512
513 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
514 {
515 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
516 dev->ifname, buf, buf_sz);
517 }
518
519 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
520 {
521 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
522 dev->ifname, buf, buf_sz);
523 }
524
525 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
526 {
527 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
528 dev->ifname, buf, buf_sz);
529 }
530
531 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
532 {
533 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
534 dev->ifname, buf, buf_sz);
535 }
536
537 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
538 {
539 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
540 dev->ifname, buf, buf_sz);
541 }
542
543 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
544 {
545 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
546 dev->ifname, buf, buf_sz);
547 }
548
549 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
550 {
551 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
552 dev->ifname, buf, buf_sz);
553 }
554
555 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
556 {
557 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
558 dev->ifname, buf, buf_sz);
559 }
560
561 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
562 {
563 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
564 dev->ifname, buf, buf_sz);
565 }
566
567 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
568 {
569 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
570 dev->ifname, buf, buf_sz);
571 }
572
573 /* Evaluate netlink messages */
574 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
575 {
576 struct nlmsghdr *nh = nlmsg_hdr(msg);
577 struct nlattr *nla[__IFLA_MAX];
578 int link_state = 0;
579 char buf[10];
580
581 if (nh->nlmsg_type != RTM_NEWLINK)
582 goto out;
583
584 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
585 if (!nla[IFLA_IFNAME])
586 goto out;
587
588 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
589 if (!dev)
590 goto out;
591
592 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
593 link_state = strtoul(buf, NULL, 0);
594
595 if (dev->type == &simple_device_type && !system_if_force_external(dev->ifname))
596 device_set_present(dev, true);
597
598 device_set_link(dev, link_state ? true : false);
599
600 out:
601 return 0;
602 }
603
604 static void
605 handle_hotplug_msg(char *data, int size)
606 {
607 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
608 char *cur, *end, *sep;
609 struct device *dev;
610 int skip;
611 bool add, move = false;
612
613 if (!strncmp(data, "add@", 4))
614 add = true;
615 else if (!strncmp(data, "remove@", 7))
616 add = false;
617 else if (!strncmp(data, "move@", 5)) {
618 add = true;
619 move = true;
620 }
621 else
622 return;
623
624 skip = strlen(data) + 1;
625 end = data + size;
626
627 for (cur = data + skip; cur < end; cur += skip) {
628 skip = strlen(cur) + 1;
629
630 sep = strchr(cur, '=');
631 if (!sep)
632 continue;
633
634 *sep = 0;
635 if (!strcmp(cur, "INTERFACE"))
636 interface = sep + 1;
637 else if (!strcmp(cur, "SUBSYSTEM")) {
638 subsystem = sep + 1;
639 if (strcmp(subsystem, "net") != 0)
640 return;
641 } else if (!strcmp(cur, "DEVPATH_OLD")) {
642 interface_old = strrchr(sep + 1, '/');
643 if (interface_old)
644 interface_old++;
645 }
646 }
647
648 if (subsystem && interface) {
649 if (move && interface_old)
650 goto move;
651 else
652 goto found;
653 }
654
655 return;
656
657 move:
658 dev = device_find(interface_old);
659 if (!dev)
660 return;
661
662 if (dev->type != &simple_device_type)
663 goto found;
664
665 device_set_present(dev, false);
666
667 return;
668
669 found:
670 dev = device_find(interface);
671 if (!dev)
672 return;
673
674 if (dev->type != &simple_device_type)
675 return;
676
677 if (add && system_if_force_external(dev->ifname))
678 return;
679
680 device_set_present(dev, add);
681 }
682
683 static void
684 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
685 {
686 struct event_socket *ev = container_of(u, struct event_socket, uloop);
687 struct sockaddr_nl nla;
688 unsigned char *buf = NULL;
689 int size;
690 int err;
691 socklen_t errlen = sizeof(err);
692
693 if (!u->error) {
694 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
695 if (nla.nl_pid == 0)
696 handle_hotplug_msg((char *) buf, size);
697
698 free(buf);
699 }
700 return;
701 }
702
703 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
704 goto abort;
705
706 switch(err) {
707 case ENOBUFS:
708 /* Increase rx buffer size on netlink socket */
709 ev->bufsize *= 2;
710 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
711 goto abort;
712 break;
713
714 default:
715 goto abort;
716 }
717 u->error = false;
718 return;
719
720 abort:
721 uloop_fd_delete(&ev->uloop);
722 return;
723 }
724
725 static int system_rtnl_call(struct nl_msg *msg)
726 {
727 int ret;
728
729 ret = nl_send_auto_complete(sock_rtnl, msg);
730 nlmsg_free(msg);
731
732 if (ret < 0)
733 return ret;
734
735 return nl_wait_for_ack(sock_rtnl);
736 }
737
738 int system_bridge_delbr(struct device *bridge)
739 {
740 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
741 }
742
743 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
744 {
745 struct ifreq ifr;
746
747 memset(&ifr, 0, sizeof(ifr));
748 if (dev)
749 ifr.ifr_ifindex = dev->ifindex;
750 else
751 ifr.ifr_data = data;
752 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
753 return ioctl(sock_ioctl, cmd, &ifr);
754 }
755
756 static bool system_is_bridge(const char *name, char *buf, int buflen)
757 {
758 struct stat st;
759
760 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
761 if (stat(buf, &st) < 0)
762 return false;
763
764 return true;
765 }
766
767 static char *system_get_bridge(const char *name, char *buf, int buflen)
768 {
769 char *path;
770 ssize_t len = -1;
771 glob_t gl;
772
773 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
774 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
775 return NULL;
776
777 if (gl.gl_pathc > 0)
778 len = readlink(gl.gl_pathv[0], buf, buflen);
779
780 globfree(&gl);
781
782 if (len < 0)
783 return NULL;
784
785 buf[len] = 0;
786 path = strrchr(buf, '/');
787 if (!path)
788 return NULL;
789
790 return path + 1;
791 }
792
793 static void
794 system_bridge_set_wireless(struct device *bridge, struct device *dev)
795 {
796 bool mcast_to_ucast = dev->wireless_ap;
797 bool hairpin = true;
798
799 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
800 !bridge->settings.multicast_to_unicast)
801 mcast_to_ucast = false;
802
803 if (!mcast_to_ucast || dev->wireless_isolate)
804 hairpin = false;
805
806 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
807 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
808 }
809
810 int system_bridge_addif(struct device *bridge, struct device *dev)
811 {
812 char buf[64];
813 char *oldbr;
814 int ret = 0;
815
816 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
817 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
818 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
819
820 if (dev->wireless)
821 system_bridge_set_wireless(bridge, dev);
822
823 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
824 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
825 system_bridge_set_multicast_router(dev, buf, false);
826 }
827
828 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
829 dev->settings.multicast_fast_leave)
830 system_bridge_set_multicast_fast_leave(dev, "1");
831
832 if (dev->settings.flags & DEV_OPT_LEARNING &&
833 !dev->settings.learning)
834 system_bridge_set_learning(dev, "0");
835
836 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
837 !dev->settings.unicast_flood)
838 system_bridge_set_unicast_flood(dev, "0");
839
840 if (dev->settings.flags & DEV_OPT_ISOLATE &&
841 dev->settings.isolate)
842 system_bridge_set_isolated(dev, "1");
843
844 return ret;
845 }
846
847 int system_bridge_delif(struct device *bridge, struct device *dev)
848 {
849 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
850 }
851
852 int system_if_resolve(struct device *dev)
853 {
854 struct ifreq ifr;
855 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
856 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
857 return ifr.ifr_ifindex;
858 else
859 return 0;
860 }
861
862 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
863 {
864 struct ifreq ifr;
865
866 memset(&ifr, 0, sizeof(ifr));
867 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
868 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
869 return -1;
870
871 ifr.ifr_flags |= add;
872 ifr.ifr_flags &= ~rem;
873 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
874 }
875
876 struct clear_data {
877 struct nl_msg *msg;
878 struct device *dev;
879 int type;
880 int size;
881 int af;
882 };
883
884
885 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
886 {
887 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
888
889 return ifa->ifa_index == ifindex;
890 }
891
892 static bool check_route(struct nlmsghdr *hdr, int ifindex)
893 {
894 struct rtmsg *r = NLMSG_DATA(hdr);
895 struct nlattr *tb[__RTA_MAX];
896
897 if (r->rtm_protocol == RTPROT_KERNEL &&
898 r->rtm_family == AF_INET6)
899 return false;
900
901 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
902 if (!tb[RTA_OIF])
903 return false;
904
905 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
906 }
907
908 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
909 {
910 return true;
911 }
912
913 static int cb_clear_event(struct nl_msg *msg, void *arg)
914 {
915 struct clear_data *clr = arg;
916 struct nlmsghdr *hdr = nlmsg_hdr(msg);
917 bool (*cb)(struct nlmsghdr *, int ifindex);
918 int type, ret;
919
920 switch(clr->type) {
921 case RTM_GETADDR:
922 type = RTM_DELADDR;
923 if (hdr->nlmsg_type != RTM_NEWADDR)
924 return NL_SKIP;
925
926 cb = check_ifaddr;
927 break;
928 case RTM_GETROUTE:
929 type = RTM_DELROUTE;
930 if (hdr->nlmsg_type != RTM_NEWROUTE)
931 return NL_SKIP;
932
933 cb = check_route;
934 break;
935 case RTM_GETRULE:
936 type = RTM_DELRULE;
937 if (hdr->nlmsg_type != RTM_NEWRULE)
938 return NL_SKIP;
939
940 cb = check_rule;
941 break;
942 default:
943 return NL_SKIP;
944 }
945
946 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
947 return NL_SKIP;
948
949 if (type == RTM_DELRULE)
950 D(SYSTEM, "Remove a rule\n");
951 else
952 D(SYSTEM, "Remove %s from device %s\n",
953 type == RTM_DELADDR ? "an address" : "a route",
954 clr->dev->ifname);
955
956 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
957 hdr = nlmsg_hdr(clr->msg);
958 hdr->nlmsg_type = type;
959 hdr->nlmsg_flags = NLM_F_REQUEST;
960
961 nl_socket_disable_auto_ack(sock_rtnl);
962 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
963 if (ret < 0) {
964 if (type == RTM_DELRULE)
965 D(SYSTEM, "Error deleting a rule: %d\n", ret);
966 else
967 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
968 type == RTM_DELADDR ? "an address" : "a route",
969 clr->dev->ifname, ret);
970 }
971
972 nl_socket_enable_auto_ack(sock_rtnl);
973
974 return NL_SKIP;
975 }
976
977 static int
978 cb_finish_event(struct nl_msg *msg, void *arg)
979 {
980 int *pending = arg;
981 *pending = 0;
982 return NL_STOP;
983 }
984
985 static int
986 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
987 {
988 int *pending = arg;
989 *pending = err->error;
990 return NL_STOP;
991 }
992
993 static void
994 system_if_clear_entries(struct device *dev, int type, int af)
995 {
996 struct clear_data clr;
997 struct nl_cb *cb;
998 struct rtmsg rtm = {
999 .rtm_family = af,
1000 .rtm_flags = RTM_F_CLONED,
1001 };
1002 int flags = NLM_F_DUMP;
1003 int pending = 1;
1004
1005 clr.af = af;
1006 clr.dev = dev;
1007 clr.type = type;
1008 switch (type) {
1009 case RTM_GETADDR:
1010 case RTM_GETRULE:
1011 clr.size = sizeof(struct rtgenmsg);
1012 break;
1013 case RTM_GETROUTE:
1014 clr.size = sizeof(struct rtmsg);
1015 break;
1016 default:
1017 return;
1018 }
1019
1020 cb = nl_cb_alloc(NL_CB_DEFAULT);
1021 if (!cb)
1022 return;
1023
1024 clr.msg = nlmsg_alloc_simple(type, flags);
1025 if (!clr.msg)
1026 goto out;
1027
1028 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1029 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1030 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1031 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1032
1033 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1034 goto free;
1035
1036 while (pending > 0)
1037 nl_recvmsgs(sock_rtnl, cb);
1038
1039 free:
1040 nlmsg_free(clr.msg);
1041 out:
1042 nl_cb_put(cb);
1043 }
1044
1045 /*
1046 * Clear bridge (membership) state and bring down device
1047 */
1048 void system_if_clear_state(struct device *dev)
1049 {
1050 static char buf[256];
1051 char *bridge;
1052 device_set_ifindex(dev, system_if_resolve(dev));
1053
1054 if (dev->external || !dev->ifindex)
1055 return;
1056
1057 system_if_flags(dev->ifname, 0, IFF_UP);
1058
1059 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
1060 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1061 system_bridge_delbr(dev);
1062 return;
1063 }
1064
1065 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1066 if (bridge) {
1067 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1068 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1069 }
1070
1071 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1072 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1073 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1074 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1075 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1076 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1077 system_set_disable_ipv6(dev, "0");
1078 }
1079
1080 static inline unsigned long
1081 sec_to_jiffies(int val)
1082 {
1083 return (unsigned long) val * 100;
1084 }
1085
1086 static void system_bridge_conf_multicast_deps(struct device *bridge,
1087 struct bridge_config *cfg,
1088 char *buf,
1089 int buf_len)
1090 {
1091 int val;
1092
1093 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1094 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1095 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1096 val = cfg->robustness * cfg->query_interval +
1097 cfg->query_response_interval;
1098
1099 snprintf(buf, buf_len, "%i", val);
1100 system_bridge_set_membership_interval(bridge, buf);
1101
1102 val = cfg->robustness * cfg->query_interval +
1103 cfg->query_response_interval / 2;
1104
1105 snprintf(buf, buf_len, "%i", val);
1106 system_bridge_set_other_querier_timeout(bridge, buf);
1107 }
1108
1109 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1110 val = cfg->query_interval / 4;
1111
1112 snprintf(buf, buf_len, "%i", val);
1113 system_bridge_set_startup_query_interval(bridge, buf);
1114 }
1115 }
1116
1117 static void system_bridge_conf_multicast(struct device *bridge,
1118 struct bridge_config *cfg,
1119 char *buf,
1120 int buf_len)
1121 {
1122 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1123 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1124
1125 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1126 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1127
1128 snprintf(buf, buf_len, "%i", cfg->hash_max);
1129 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1130 bridge->ifname, buf);
1131
1132 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1133 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1134 system_bridge_set_multicast_router(bridge, buf, true);
1135 }
1136
1137 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1138 snprintf(buf, buf_len, "%i", cfg->robustness);
1139 system_bridge_set_robustness(bridge, buf);
1140 }
1141
1142 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1143 snprintf(buf, buf_len, "%i", cfg->query_interval);
1144 system_bridge_set_query_interval(bridge, buf);
1145 }
1146
1147 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1148 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1149 system_bridge_set_query_response_interval(bridge, buf);
1150 }
1151
1152 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1153 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1154 system_bridge_set_last_member_interval(bridge, buf);
1155 }
1156
1157 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1158 }
1159
1160 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1161 {
1162 char buf[64];
1163
1164 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1165 return -1;
1166
1167 system_bridge_set_stp_state(bridge, cfg->stp ? "1" : "0");
1168
1169 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1170 system_bridge_set_forward_delay(bridge, buf);
1171
1172 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1173
1174 snprintf(buf, sizeof(buf), "%d", cfg->priority);
1175 system_bridge_set_priority(bridge, buf);
1176
1177 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1178 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1179 system_bridge_set_ageing_time(bridge, buf);
1180 }
1181
1182 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1183 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1184 system_bridge_set_hello_time(bridge, buf);
1185 }
1186
1187 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1188 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1189 system_bridge_set_max_age(bridge, buf);
1190 }
1191
1192 return 0;
1193 }
1194
1195 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1196 {
1197 struct nl_msg *msg;
1198 struct nlattr *linkinfo, *data;
1199 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1200 int i, rv;
1201 static const struct {
1202 const char *name;
1203 enum macvlan_mode val;
1204 } modes[] = {
1205 { "private", MACVLAN_MODE_PRIVATE },
1206 { "vepa", MACVLAN_MODE_VEPA },
1207 { "bridge", MACVLAN_MODE_BRIDGE },
1208 { "passthru", MACVLAN_MODE_PASSTHRU },
1209 };
1210
1211 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1212
1213 if (!msg)
1214 return -1;
1215
1216 nlmsg_append(msg, &iim, sizeof(iim), 0);
1217
1218 if (cfg->flags & MACVLAN_OPT_MACADDR)
1219 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1220 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1221 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1222
1223 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1224 goto nla_put_failure;
1225
1226 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1227
1228 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1229 goto nla_put_failure;
1230
1231 if (cfg->mode) {
1232 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1233 if (strcmp(cfg->mode, modes[i].name) != 0)
1234 continue;
1235
1236 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1237 break;
1238 }
1239 }
1240
1241 nla_nest_end(msg, data);
1242 nla_nest_end(msg, linkinfo);
1243
1244 rv = system_rtnl_call(msg);
1245 if (rv)
1246 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1247
1248 return rv;
1249
1250 nla_put_failure:
1251 nlmsg_free(msg);
1252 return -ENOMEM;
1253 }
1254
1255 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1256 {
1257 struct nl_msg *msg;
1258 struct ifinfomsg iim = {
1259 .ifi_family = AF_UNSPEC,
1260 };
1261
1262 if (!dev)
1263 return -1;
1264
1265 iim.ifi_index = system_if_resolve(dev);
1266 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1267
1268 if (!msg)
1269 return -1;
1270
1271 nlmsg_append(msg, &iim, sizeof(iim), 0);
1272 if (target_ifname)
1273 nla_put_string(msg, IFLA_IFNAME, target_ifname);
1274
1275 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1276 return system_rtnl_call(msg);
1277 }
1278
1279 static int system_link_del(const char *ifname)
1280 {
1281 struct nl_msg *msg;
1282 struct ifinfomsg iim = {
1283 .ifi_family = AF_UNSPEC,
1284 .ifi_index = 0,
1285 };
1286
1287 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1288
1289 if (!msg)
1290 return -1;
1291
1292 nlmsg_append(msg, &iim, sizeof(iim), 0);
1293 nla_put_string(msg, IFLA_IFNAME, ifname);
1294 return system_rtnl_call(msg);
1295 }
1296
1297 int system_macvlan_del(struct device *macvlan)
1298 {
1299 return system_link_del(macvlan->ifname);
1300 }
1301
1302 int system_netns_open(const pid_t target_ns)
1303 {
1304 char pid_net_path[PATH_MAX];
1305
1306 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1307
1308 return open(pid_net_path, O_RDONLY);
1309 }
1310
1311 int system_netns_set(int netns_fd)
1312 {
1313 return setns(netns_fd, CLONE_NEWNET);
1314 }
1315
1316 int system_veth_add(struct device *veth, struct veth_config *cfg)
1317 {
1318 struct nl_msg *msg;
1319 struct ifinfomsg empty_iim = {};
1320 struct nlattr *linkinfo, *data, *veth_info;
1321 int rv;
1322
1323 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1324
1325 if (!msg)
1326 return -1;
1327
1328 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1329
1330 if (cfg->flags & VETH_OPT_MACADDR)
1331 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1332 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1333
1334 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1335 goto nla_put_failure;
1336
1337 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1338
1339 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1340 goto nla_put_failure;
1341
1342 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1343 goto nla_put_failure;
1344
1345 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1346
1347 if (cfg->flags & VETH_OPT_PEER_NAME)
1348 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1349 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1350 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1351
1352 nla_nest_end(msg, veth_info);
1353 nla_nest_end(msg, data);
1354 nla_nest_end(msg, linkinfo);
1355
1356 rv = system_rtnl_call(msg);
1357 if (rv) {
1358 if (cfg->flags & VETH_OPT_PEER_NAME)
1359 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1360 else
1361 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1362 }
1363
1364 return rv;
1365
1366 nla_put_failure:
1367 nlmsg_free(msg);
1368 return -ENOMEM;
1369 }
1370
1371 int system_veth_del(struct device *veth)
1372 {
1373 return system_link_del(veth->ifname);
1374 }
1375
1376 static int system_vlan(struct device *dev, int id)
1377 {
1378 struct vlan_ioctl_args ifr = {
1379 .cmd = SET_VLAN_NAME_TYPE_CMD,
1380 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1381 };
1382
1383 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1384 return -1;
1385
1386 if (id < 0) {
1387 ifr.cmd = DEL_VLAN_CMD;
1388 ifr.u.VID = 0;
1389 } else {
1390 ifr.cmd = ADD_VLAN_CMD;
1391 ifr.u.VID = id;
1392 }
1393 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1394 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1395 }
1396
1397 int system_vlan_add(struct device *dev, int id)
1398 {
1399 return system_vlan(dev, id);
1400 }
1401
1402 int system_vlan_del(struct device *dev)
1403 {
1404 return system_vlan(dev, -1);
1405 }
1406
1407 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1408 {
1409 struct nl_msg *msg;
1410 struct nlattr *linkinfo, *data, *qos;
1411 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1412 struct vlan_qos_mapping *elem;
1413 struct ifla_vlan_qos_mapping nl_qos_map;
1414 int rv;
1415
1416 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1417
1418 if (!msg)
1419 return -1;
1420
1421 nlmsg_append(msg, &iim, sizeof(iim), 0);
1422 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1423 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1424
1425 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1426 goto nla_put_failure;
1427
1428 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1429
1430 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1431 goto nla_put_failure;
1432
1433 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1434
1435 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1436 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1437 #else
1438 if(cfg->proto == VLAN_PROTO_8021AD)
1439 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);
1440 #endif
1441
1442 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1443 goto nla_put_failure;
1444
1445 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1446 nl_qos_map.from = elem->from;
1447 nl_qos_map.to = elem->to;
1448 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1449 }
1450 nla_nest_end(msg, qos);
1451
1452 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1453 goto nla_put_failure;
1454
1455 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1456 nl_qos_map.from = elem->from;
1457 nl_qos_map.to = elem->to;
1458 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1459 }
1460 nla_nest_end(msg, qos);
1461
1462 nla_nest_end(msg, data);
1463 nla_nest_end(msg, linkinfo);
1464
1465 rv = system_rtnl_call(msg);
1466 if (rv)
1467 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1468
1469 return rv;
1470
1471 nla_put_failure:
1472 nlmsg_free(msg);
1473 return -ENOMEM;
1474 }
1475
1476 int system_vlandev_del(struct device *vlandev)
1477 {
1478 return system_link_del(vlandev->ifname);
1479 }
1480
1481 void
1482 system_if_get_settings(struct device *dev, struct device_settings *s)
1483 {
1484 struct ifreq ifr;
1485 char buf[10];
1486
1487 memset(&ifr, 0, sizeof(ifr));
1488 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1489
1490 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1491 s->mtu = ifr.ifr_mtu;
1492 s->flags |= DEV_OPT_MTU;
1493 }
1494
1495 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1496 if (s->mtu6 > 0)
1497 s->flags |= DEV_OPT_MTU6;
1498
1499 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1500 s->txqueuelen = ifr.ifr_qlen;
1501 s->flags |= DEV_OPT_TXQUEUELEN;
1502 }
1503
1504 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1505 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1506 s->flags |= DEV_OPT_MACADDR;
1507 }
1508
1509 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1510 s->ipv6 = !strtoul(buf, NULL, 0);
1511 s->flags |= DEV_OPT_IPV6;
1512 }
1513
1514 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1515 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1516 s->flags |= DEV_OPT_PROMISC;
1517
1518 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1519 s->flags |= DEV_OPT_MULTICAST;
1520 }
1521
1522 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1523 s->rpfilter = strtoul(buf, NULL, 0);
1524 s->flags |= DEV_OPT_RPFILTER;
1525 }
1526
1527 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1528 s->acceptlocal = strtoul(buf, NULL, 0);
1529 s->flags |= DEV_OPT_ACCEPTLOCAL;
1530 }
1531
1532 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1533 s->igmpversion = strtoul(buf, NULL, 0);
1534 s->flags |= DEV_OPT_IGMPVERSION;
1535 }
1536
1537 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1538 s->mldversion = strtoul(buf, NULL, 0);
1539 s->flags |= DEV_OPT_MLDVERSION;
1540 }
1541
1542 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1543 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1544 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1545 }
1546
1547 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1548 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1549 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1550 }
1551
1552 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1553 s->neigh4locktime = strtol(buf, NULL, 0);
1554 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1555 }
1556
1557 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1558 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1559 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1560 }
1561
1562 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1563 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1564 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1565 }
1566
1567 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1568 s->dadtransmits = strtoul(buf, NULL, 0);
1569 s->flags |= DEV_OPT_DADTRANSMITS;
1570 }
1571
1572 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1573 s->sendredirects = strtoul(buf, NULL, 0);
1574 s->flags |= DEV_OPT_SENDREDIRECTS;
1575 }
1576 }
1577
1578 void
1579 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1580 {
1581 struct ifreq ifr;
1582 char buf[12];
1583
1584 memset(&ifr, 0, sizeof(ifr));
1585 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1586 if (s->flags & DEV_OPT_MTU & apply_mask) {
1587 ifr.ifr_mtu = s->mtu;
1588 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1589 s->flags &= ~DEV_OPT_MTU;
1590 }
1591 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1592 system_update_ipv6_mtu(dev, s->mtu6);
1593 }
1594 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1595 ifr.ifr_qlen = s->txqueuelen;
1596 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1597 s->flags &= ~DEV_OPT_TXQUEUELEN;
1598 }
1599 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1600 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1601 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1602 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1603 s->flags &= ~DEV_OPT_MACADDR;
1604 }
1605 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1606 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1607 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1608 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1609 !s->promisc ? IFF_PROMISC : 0) < 0)
1610 s->flags &= ~DEV_OPT_PROMISC;
1611 }
1612 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1613 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1614 system_set_rpfilter(dev, buf);
1615 }
1616 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1617 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1618 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1619 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1620 system_set_igmpversion(dev, buf);
1621 }
1622 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1623 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1624 system_set_mldversion(dev, buf);
1625 }
1626 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1627 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1628 system_set_neigh4reachabletime(dev, buf);
1629 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1630 system_set_neigh6reachabletime(dev, buf);
1631 }
1632 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1633 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1634 system_set_neigh4locktime(dev, buf);
1635 }
1636 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1637 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1638 system_set_neigh4gcstaletime(dev, buf);
1639 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1640 system_set_neigh6gcstaletime(dev, buf);
1641 }
1642 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1643 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1644 system_set_dadtransmits(dev, buf);
1645 }
1646 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1647 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1648 !s->multicast ? IFF_MULTICAST : 0) < 0)
1649 s->flags &= ~DEV_OPT_MULTICAST;
1650 }
1651 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1652 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1653 }
1654
1655 int system_if_up(struct device *dev)
1656 {
1657 system_if_get_settings(dev, &dev->orig_settings);
1658 /* Only keep orig settings based on what needs to be set */
1659 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1660 dev->orig_settings.flags &= dev->settings.flags;
1661 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1662 return system_if_flags(dev->ifname, IFF_UP, 0);
1663 }
1664
1665 int system_if_down(struct device *dev)
1666 {
1667 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1668 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1669 return ret;
1670 }
1671
1672 struct if_check_data {
1673 struct device *dev;
1674 int pending;
1675 int ret;
1676 };
1677
1678 #ifndef IFF_LOWER_UP
1679 #define IFF_LOWER_UP 0x10000
1680 #endif
1681
1682 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1683 {
1684 struct nlmsghdr *nh = nlmsg_hdr(msg);
1685 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1686 struct if_check_data *chk = (struct if_check_data *)arg;
1687
1688 if (nh->nlmsg_type != RTM_NEWLINK)
1689 return NL_SKIP;
1690
1691 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1692 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1693
1694 return NL_OK;
1695 }
1696
1697 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1698 {
1699 struct if_check_data *chk = (struct if_check_data *)arg;
1700 chk->pending = 0;
1701 return NL_STOP;
1702 }
1703
1704 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1705 {
1706 struct if_check_data *chk = (struct if_check_data *)arg;
1707
1708 device_set_present(chk->dev, false);
1709 device_set_link(chk->dev, false);
1710 chk->pending = err->error;
1711
1712 return NL_STOP;
1713 }
1714
1715 int system_if_check(struct device *dev)
1716 {
1717 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1718 struct nl_msg *msg;
1719 struct ifinfomsg ifi = {
1720 .ifi_family = AF_UNSPEC,
1721 .ifi_index = 0,
1722 };
1723 struct if_check_data chk = {
1724 .dev = dev,
1725 .pending = 1,
1726 };
1727 int ret = 1;
1728
1729 if (!cb)
1730 return ret;
1731
1732 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1733 if (!msg)
1734 goto out;
1735
1736 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1737 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1738 goto free;
1739
1740 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1741 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1742 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1743
1744 ret = nl_send_auto_complete(sock_rtnl, msg);
1745 if (ret < 0)
1746 goto free;
1747
1748 while (chk.pending > 0)
1749 nl_recvmsgs(sock_rtnl, cb);
1750
1751 ret = chk.pending;
1752
1753 free:
1754 nlmsg_free(msg);
1755 out:
1756 nl_cb_put(cb);
1757 return ret;
1758 }
1759
1760 struct device *
1761 system_if_get_parent(struct device *dev)
1762 {
1763 char buf[64], *devname;
1764 int ifindex, iflink, len;
1765 FILE *f;
1766
1767 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1768 f = fopen(buf, "r");
1769 if (!f)
1770 return NULL;
1771
1772 len = fread(buf, 1, sizeof(buf) - 1, f);
1773 fclose(f);
1774
1775 if (len <= 0)
1776 return NULL;
1777
1778 buf[len] = 0;
1779 iflink = strtoul(buf, NULL, 0);
1780 ifindex = system_if_resolve(dev);
1781 if (!iflink || iflink == ifindex)
1782 return NULL;
1783
1784 devname = if_indextoname(iflink, buf);
1785 if (!devname)
1786 return NULL;
1787
1788 return device_get(devname, true);
1789 }
1790
1791 static bool
1792 read_string_file(int dir_fd, const char *file, char *buf, int len)
1793 {
1794 bool ret = false;
1795 char *c;
1796 int fd;
1797
1798 fd = openat(dir_fd, file, O_RDONLY);
1799 if (fd < 0)
1800 return false;
1801
1802 retry:
1803 len = read(fd, buf, len - 1);
1804 if (len < 0) {
1805 if (errno == EINTR)
1806 goto retry;
1807 } else if (len > 0) {
1808 buf[len] = 0;
1809
1810 c = strchr(buf, '\n');
1811 if (c)
1812 *c = 0;
1813
1814 ret = true;
1815 }
1816
1817 close(fd);
1818
1819 return ret;
1820 }
1821
1822 static bool
1823 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1824 {
1825 char buf[64];
1826 bool ret = false;
1827
1828 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1829 if (ret)
1830 *val = strtoull(buf, NULL, 0);
1831
1832 return ret;
1833 }
1834
1835 /* Assume advertised flags == supported flags */
1836 static const struct {
1837 uint32_t mask;
1838 const char *name;
1839 } ethtool_link_modes[] = {
1840 { ADVERTISED_10baseT_Half, "10baseT-H" },
1841 { ADVERTISED_10baseT_Full, "10baseT-F" },
1842 { ADVERTISED_100baseT_Half, "100baseT-H" },
1843 { ADVERTISED_100baseT_Full, "100baseT-F" },
1844 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1845 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1846 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1847 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1848 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1849 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1850 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1851 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1852 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1853 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1854 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1855 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1856 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1857 #ifdef ADVERTISED_56000baseKR4_Full
1858 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1859 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1860 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1861 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1862 #endif
1863 };
1864
1865 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1866 {
1867 int i;
1868 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1869 if (mask & ethtool_link_modes[i].mask)
1870 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1871 }
1872 }
1873
1874 bool
1875 system_if_force_external(const char *ifname)
1876 {
1877 char buf[64];
1878 struct stat s;
1879
1880 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1881 return stat(buf, &s) == 0;
1882 }
1883
1884 int
1885 system_if_dump_info(struct device *dev, struct blob_buf *b)
1886 {
1887 struct ethtool_cmd ecmd;
1888 struct ifreq ifr;
1889 char *s;
1890 void *c;
1891
1892 memset(&ecmd, 0, sizeof(ecmd));
1893 memset(&ifr, 0, sizeof(ifr));
1894 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1895 ifr.ifr_data = (caddr_t) &ecmd;
1896 ecmd.cmd = ETHTOOL_GSET;
1897
1898 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1899 c = blobmsg_open_array(b, "link-advertising");
1900 system_add_link_modes(b, ecmd.advertising);
1901 blobmsg_close_array(b, c);
1902
1903 c = blobmsg_open_array(b, "link-partner-advertising");
1904 system_add_link_modes(b, ecmd.lp_advertising);
1905 blobmsg_close_array(b, c);
1906
1907 c = blobmsg_open_array(b, "link-supported");
1908 system_add_link_modes(b, ecmd.supported);
1909 blobmsg_close_array(b, c);
1910
1911 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1912 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1913 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1914 blobmsg_add_string_buffer(b);
1915
1916 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1917 }
1918
1919 return 0;
1920 }
1921
1922 int
1923 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1924 {
1925 const char *const counters[] = {
1926 "collisions", "rx_frame_errors", "tx_compressed",
1927 "multicast", "rx_length_errors", "tx_dropped",
1928 "rx_bytes", "rx_missed_errors", "tx_errors",
1929 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1930 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1931 "rx_dropped", "tx_aborted_errors", "tx_packets",
1932 "rx_errors", "tx_bytes", "tx_window_errors",
1933 "rx_fifo_errors", "tx_carrier_errors",
1934 };
1935 char buf[64];
1936 int stats_dir;
1937 int i;
1938 uint64_t val = 0;
1939
1940 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1941 stats_dir = open(buf, O_DIRECTORY);
1942 if (stats_dir < 0)
1943 return -1;
1944
1945 for (i = 0; i < ARRAY_SIZE(counters); i++)
1946 if (read_uint64_file(stats_dir, counters[i], &val))
1947 blobmsg_add_u64(b, counters[i], val);
1948
1949 close(stats_dir);
1950 return 0;
1951 }
1952
1953 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1954 {
1955 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1956 int alen = v4 ? 4 : 16;
1957 unsigned int flags = 0;
1958 struct ifaddrmsg ifa = {
1959 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1960 .ifa_prefixlen = addr->mask,
1961 .ifa_index = dev->ifindex,
1962 };
1963
1964 struct nl_msg *msg;
1965 if (cmd == RTM_NEWADDR)
1966 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1967
1968 msg = nlmsg_alloc_simple(cmd, flags);
1969 if (!msg)
1970 return -1;
1971
1972 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1973 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1974 if (v4) {
1975 if (addr->broadcast)
1976 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1977 if (addr->point_to_point)
1978 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1979 } else {
1980 time_t now = system_get_rtime();
1981 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1982
1983 if (addr->preferred_until) {
1984 int64_t preferred = addr->preferred_until - now;
1985 if (preferred < 0)
1986 preferred = 0;
1987 else if (preferred > UINT32_MAX)
1988 preferred = UINT32_MAX;
1989
1990 cinfo.ifa_prefered = preferred;
1991 }
1992
1993 if (addr->valid_until) {
1994 int64_t valid = addr->valid_until - now;
1995 if (valid <= 0) {
1996 nlmsg_free(msg);
1997 return -1;
1998 }
1999 else if (valid > UINT32_MAX)
2000 valid = UINT32_MAX;
2001
2002 cinfo.ifa_valid = valid;
2003 }
2004
2005 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2006
2007 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2008 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2009 }
2010
2011 return system_rtnl_call(msg);
2012 }
2013
2014 int system_add_address(struct device *dev, struct device_addr *addr)
2015 {
2016 return system_addr(dev, addr, RTM_NEWADDR);
2017 }
2018
2019 int system_del_address(struct device *dev, struct device_addr *addr)
2020 {
2021 return system_addr(dev, addr, RTM_DELADDR);
2022 }
2023
2024 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2025 {
2026 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2027 unsigned int flags = 0;
2028 struct ndmsg ndm = {
2029 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2030 .ndm_ifindex = dev->ifindex,
2031 .ndm_state = NUD_PERMANENT,
2032 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2033 };
2034 struct nl_msg *msg;
2035
2036 if (cmd == RTM_NEWNEIGH)
2037 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2038
2039 msg = nlmsg_alloc_simple(cmd, flags);
2040
2041 if (!msg)
2042 return -1;
2043
2044 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2045
2046 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2047 if (neighbor->flags & DEVNEIGH_MAC)
2048 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2049
2050
2051 return system_rtnl_call(msg);
2052 }
2053
2054 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2055 {
2056 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2057 }
2058
2059 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2060 {
2061 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2062 }
2063
2064 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2065 {
2066 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2067 bool have_gw;
2068 unsigned int flags = 0;
2069
2070 if (alen == 4)
2071 have_gw = !!route->nexthop.in.s_addr;
2072 else
2073 have_gw = route->nexthop.in6.s6_addr32[0] ||
2074 route->nexthop.in6.s6_addr32[1] ||
2075 route->nexthop.in6.s6_addr32[2] ||
2076 route->nexthop.in6.s6_addr32[3];
2077
2078 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2079 ? route->table : RT_TABLE_MAIN;
2080
2081 struct rtmsg rtm = {
2082 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2083 .rtm_dst_len = route->mask,
2084 .rtm_src_len = route->sourcemask,
2085 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2086 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2087 .rtm_scope = RT_SCOPE_NOWHERE,
2088 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2089 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2090 };
2091 struct nl_msg *msg;
2092
2093 if (cmd == RTM_NEWROUTE) {
2094 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2095
2096 if (!dev) { /* Add null-route */
2097 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2098 rtm.rtm_type = RTN_UNREACHABLE;
2099 }
2100 else
2101 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2102 }
2103
2104 if (route->flags & DEVROUTE_TYPE) {
2105 rtm.rtm_type = route->type;
2106 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2107 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2108 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2109 rtm.rtm_table = RT_TABLE_LOCAL;
2110 }
2111
2112 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2113 rtm.rtm_scope = RT_SCOPE_HOST;
2114 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2115 rtm.rtm_type == RTN_ANYCAST) {
2116 rtm.rtm_scope = RT_SCOPE_LINK;
2117 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2118 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2119 rtm.rtm_type == RTN_THROW) {
2120 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2121 dev = NULL;
2122 }
2123 }
2124
2125 msg = nlmsg_alloc_simple(cmd, flags);
2126 if (!msg)
2127 return -1;
2128
2129 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2130
2131 if (route->mask)
2132 nla_put(msg, RTA_DST, alen, &route->addr);
2133
2134 if (route->sourcemask) {
2135 if (rtm.rtm_family == AF_INET)
2136 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2137 else
2138 nla_put(msg, RTA_SRC, alen, &route->source);
2139 }
2140
2141 if (route->metric > 0)
2142 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2143
2144 if (have_gw)
2145 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2146
2147 if (dev)
2148 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2149
2150 if (table >= 256)
2151 nla_put_u32(msg, RTA_TABLE, table);
2152
2153 if (route->flags & DEVROUTE_MTU) {
2154 struct nlattr *metrics;
2155
2156 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2157 goto nla_put_failure;
2158
2159 nla_put_u32(msg, RTAX_MTU, route->mtu);
2160
2161 nla_nest_end(msg, metrics);
2162 }
2163
2164 return system_rtnl_call(msg);
2165
2166 nla_put_failure:
2167 nlmsg_free(msg);
2168 return -ENOMEM;
2169 }
2170
2171 int system_add_route(struct device *dev, struct device_route *route)
2172 {
2173 return system_rt(dev, route, RTM_NEWROUTE);
2174 }
2175
2176 int system_del_route(struct device *dev, struct device_route *route)
2177 {
2178 return system_rt(dev, route, RTM_DELROUTE);
2179 }
2180
2181 int system_flush_routes(void)
2182 {
2183 const char *names[] = {
2184 "/proc/sys/net/ipv4/route/flush",
2185 "/proc/sys/net/ipv6/route/flush"
2186 };
2187 int fd, i;
2188
2189 for (i = 0; i < ARRAY_SIZE(names); i++) {
2190 fd = open(names[i], O_WRONLY);
2191 if (fd < 0)
2192 continue;
2193
2194 if (write(fd, "-1", 2)) {}
2195 close(fd);
2196 }
2197 return 0;
2198 }
2199
2200 bool system_resolve_rt_type(const char *type, unsigned int *id)
2201 {
2202 return system_rtn_aton(type, id);
2203 }
2204
2205 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2206 {
2207 FILE *f;
2208 char *e, buf[128];
2209 unsigned int n, proto = 256;
2210 n = strtoul(type, &e, 0);
2211 if (!*e && e != type)
2212 proto = n;
2213 else if (!strcmp(type, "unspec"))
2214 proto = RTPROT_UNSPEC;
2215 else if (!strcmp(type, "kernel"))
2216 proto = RTPROT_KERNEL;
2217 else if (!strcmp(type, "boot"))
2218 proto = RTPROT_BOOT;
2219 else if (!strcmp(type, "static"))
2220 proto = RTPROT_STATIC;
2221 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2222 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2223 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2224 continue;
2225
2226 n = strtoul(e, NULL, 10);
2227 e = strtok(NULL, " \t\n");
2228
2229 if (e && !strcmp(e, type)) {
2230 proto = n;
2231 break;
2232 }
2233 }
2234 fclose(f);
2235 }
2236
2237 if (proto > 255)
2238 return false;
2239
2240 *id = proto;
2241 return true;
2242 }
2243
2244 bool system_resolve_rt_table(const char *name, unsigned int *id)
2245 {
2246 FILE *f;
2247 char *e, buf[128];
2248 unsigned int n, table = RT_TABLE_UNSPEC;
2249
2250 /* first try to parse table as number */
2251 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2252 table = n;
2253
2254 /* handle well known aliases */
2255 else if (!strcmp(name, "default"))
2256 table = RT_TABLE_DEFAULT;
2257 else if (!strcmp(name, "main"))
2258 table = RT_TABLE_MAIN;
2259 else if (!strcmp(name, "local"))
2260 table = RT_TABLE_LOCAL;
2261
2262 /* try to look up name in /etc/iproute2/rt_tables */
2263 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2264 {
2265 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2266 {
2267 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2268 continue;
2269
2270 n = strtoul(e, NULL, 10);
2271 e = strtok(NULL, " \t\n");
2272
2273 if (e && !strcmp(e, name))
2274 {
2275 table = n;
2276 break;
2277 }
2278 }
2279
2280 fclose(f);
2281 }
2282
2283 if (table == RT_TABLE_UNSPEC)
2284 return false;
2285
2286 *id = table;
2287 return true;
2288 }
2289
2290 bool system_is_default_rt_table(unsigned int id)
2291 {
2292 return (id == RT_TABLE_MAIN);
2293 }
2294
2295 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2296 {
2297 char *e;
2298 unsigned int n;
2299
2300 if (!strcmp(filter, "strict"))
2301 n = 1;
2302 else if (!strcmp(filter, "loose"))
2303 n = 2;
2304 else {
2305 n = strtoul(filter, &e, 0);
2306 if (*e || e == filter || n > 2)
2307 return false;
2308 }
2309
2310 *id = n;
2311 return true;
2312 }
2313
2314 static int system_iprule(struct iprule *rule, int cmd)
2315 {
2316 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2317
2318 struct nl_msg *msg;
2319 struct rtmsg rtm = {
2320 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2321 .rtm_protocol = RTPROT_STATIC,
2322 .rtm_scope = RT_SCOPE_UNIVERSE,
2323 .rtm_table = RT_TABLE_UNSPEC,
2324 .rtm_type = RTN_UNSPEC,
2325 .rtm_flags = 0,
2326 };
2327
2328 if (cmd == RTM_NEWRULE)
2329 rtm.rtm_type = RTN_UNICAST;
2330
2331 if (rule->invert)
2332 rtm.rtm_flags |= FIB_RULE_INVERT;
2333
2334 if (rule->flags & IPRULE_SRC)
2335 rtm.rtm_src_len = rule->src_mask;
2336
2337 if (rule->flags & IPRULE_DEST)
2338 rtm.rtm_dst_len = rule->dest_mask;
2339
2340 if (rule->flags & IPRULE_TOS)
2341 rtm.rtm_tos = rule->tos;
2342
2343 if (rule->flags & IPRULE_LOOKUP) {
2344 if (rule->lookup < 256)
2345 rtm.rtm_table = rule->lookup;
2346 }
2347
2348 if (rule->flags & IPRULE_ACTION)
2349 rtm.rtm_type = rule->action;
2350 else if (rule->flags & IPRULE_GOTO)
2351 rtm.rtm_type = FR_ACT_GOTO;
2352 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2353 rtm.rtm_type = FR_ACT_NOP;
2354
2355 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2356
2357 if (!msg)
2358 return -1;
2359
2360 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2361
2362 if (rule->flags & IPRULE_IN)
2363 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2364
2365 if (rule->flags & IPRULE_OUT)
2366 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2367
2368 if (rule->flags & IPRULE_SRC)
2369 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2370
2371 if (rule->flags & IPRULE_DEST)
2372 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2373
2374 if (rule->flags & IPRULE_PRIORITY)
2375 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2376 else if (cmd == RTM_NEWRULE)
2377 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2378
2379 if (rule->flags & IPRULE_FWMARK)
2380 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2381
2382 if (rule->flags & IPRULE_FWMASK)
2383 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2384
2385 if (rule->flags & IPRULE_LOOKUP) {
2386 if (rule->lookup >= 256)
2387 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2388 }
2389
2390 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2391 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2392
2393 if (rule->flags & IPRULE_GOTO)
2394 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2395
2396 return system_rtnl_call(msg);
2397 }
2398
2399 int system_add_iprule(struct iprule *rule)
2400 {
2401 return system_iprule(rule, RTM_NEWRULE);
2402 }
2403
2404 int system_del_iprule(struct iprule *rule)
2405 {
2406 return system_iprule(rule, RTM_DELRULE);
2407 }
2408
2409 int system_flush_iprules(void)
2410 {
2411 int rv = 0;
2412 struct iprule rule;
2413
2414 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2415 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2416
2417 memset(&rule, 0, sizeof(rule));
2418
2419
2420 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2421
2422 rule.priority = 0;
2423 rule.lookup = RT_TABLE_LOCAL;
2424 rv |= system_iprule(&rule, RTM_NEWRULE);
2425
2426 rule.priority = 32766;
2427 rule.lookup = RT_TABLE_MAIN;
2428 rv |= system_iprule(&rule, RTM_NEWRULE);
2429
2430 rule.priority = 32767;
2431 rule.lookup = RT_TABLE_DEFAULT;
2432 rv |= system_iprule(&rule, RTM_NEWRULE);
2433
2434
2435 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2436
2437 rule.priority = 0;
2438 rule.lookup = RT_TABLE_LOCAL;
2439 rv |= system_iprule(&rule, RTM_NEWRULE);
2440
2441 rule.priority = 32766;
2442 rule.lookup = RT_TABLE_MAIN;
2443 rv |= system_iprule(&rule, RTM_NEWRULE);
2444
2445 return rv;
2446 }
2447
2448 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2449 {
2450 return system_rtn_aton(action, id);
2451 }
2452
2453 time_t system_get_rtime(void)
2454 {
2455 struct timespec ts;
2456 struct timeval tv;
2457
2458 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2459 return ts.tv_sec;
2460
2461 if (gettimeofday(&tv, NULL) == 0)
2462 return tv.tv_sec;
2463
2464 return 0;
2465 }
2466
2467 #ifndef IP_DF
2468 #define IP_DF 0x4000
2469 #endif
2470
2471 static int tunnel_ioctl(const char *name, int cmd, void *p)
2472 {
2473 struct ifreq ifr;
2474
2475 memset(&ifr, 0, sizeof(ifr));
2476 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2477 ifr.ifr_ifru.ifru_data = p;
2478 return ioctl(sock_ioctl, cmd, &ifr);
2479 }
2480
2481 #ifdef IFLA_IPTUN_MAX
2482 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2483 struct blob_attr **tb)
2484 {
2485 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2486 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2487 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2488 struct blob_attr *cur;
2489 int ret = 0, ttl = 0;
2490
2491 if (!nlm)
2492 return -1;
2493
2494 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2495 nla_put_string(nlm, IFLA_IFNAME, name);
2496
2497 if (link)
2498 nla_put_u32(nlm, IFLA_LINK, link);
2499
2500 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2501 if (!linkinfo) {
2502 ret = -ENOMEM;
2503 goto failure;
2504 }
2505
2506 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2507 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2508 if (!infodata) {
2509 ret = -ENOMEM;
2510 goto failure;
2511 }
2512
2513 if (link)
2514 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2515
2516 if ((cur = tb[TUNNEL_ATTR_TTL]))
2517 ttl = blobmsg_get_u32(cur);
2518
2519 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2520 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2521
2522 struct in6_addr in6buf;
2523 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2524 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2525 ret = -EINVAL;
2526 goto failure;
2527 }
2528 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2529 }
2530
2531 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2532 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2533 ret = -EINVAL;
2534 goto failure;
2535 }
2536 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2537 }
2538
2539 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2540 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2541 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2542
2543 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2544 blobmsg_data(cur), blobmsg_len(cur));
2545
2546 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2547 char *str = blobmsg_get_string(cur);
2548
2549 if (strcmp(str, "ignore")) {
2550 char *e;
2551 unsigned encap_limit = strtoul(str, &e, 0);
2552
2553 if (e == str || *e || encap_limit > 255) {
2554 ret = -EINVAL;
2555 goto failure;
2556 }
2557
2558 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2559 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2560 }
2561 }
2562
2563 #ifdef IFLA_IPTUN_FMR_MAX
2564 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2565 struct blob_attr *rcur;
2566 unsigned rrem, fmrcnt = 0;
2567 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2568
2569 if (!fmrs) {
2570 ret = -ENOMEM;
2571 goto failure;
2572 }
2573
2574 blobmsg_for_each_attr(rcur, cur, rrem) {
2575 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2576 struct in6_addr ip6prefix;
2577 struct in_addr ip4prefix;
2578 unsigned ip4len, ip6len, ealen, offset;
2579
2580 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2581 blobmsg_data(rcur), blobmsg_len(rcur));
2582
2583 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2584 !parse_ip_and_netmask(AF_INET6,
2585 blobmsg_data(tb_cur), &ip6prefix,
2586 &ip6len)) {
2587 ret = -EINVAL;
2588 goto failure;
2589 }
2590
2591 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2592 !parse_ip_and_netmask(AF_INET,
2593 blobmsg_data(tb_cur), &ip4prefix,
2594 &ip4len)) {
2595 ret = -EINVAL;
2596 goto failure;
2597 }
2598
2599 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2600 ret = -EINVAL;
2601 goto failure;
2602 }
2603 ealen = blobmsg_get_u32(tb_cur);
2604
2605 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2606 ret = -EINVAL;
2607 goto failure;
2608 }
2609 offset = blobmsg_get_u32(tb_cur);
2610
2611 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2612 if (!rule) {
2613 ret = -ENOMEM;
2614 goto failure;
2615 }
2616
2617 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2618 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2619 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2620 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2621 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2622 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2623
2624 nla_nest_end(nlm, rule);
2625 }
2626
2627 nla_nest_end(nlm, fmrs);
2628 }
2629 #endif
2630 if (tun_flags)
2631 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2632 }
2633
2634 nla_nest_end(nlm, infodata);
2635 nla_nest_end(nlm, linkinfo);
2636
2637 return system_rtnl_call(nlm);
2638
2639 failure:
2640 nlmsg_free(nlm);
2641 return ret;
2642 }
2643 #endif
2644
2645 #ifdef IFLA_IPTUN_MAX
2646 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2647 static int system_add_gre_tunnel(const char *name, const char *kind,
2648 const unsigned int link, struct blob_attr **tb, bool v6)
2649 {
2650 struct nl_msg *nlm;
2651 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2652 struct blob_attr *cur;
2653 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
2654 uint16_t iflags = 0, oflags = 0;
2655 uint8_t tos = 0;
2656 int ret = 0, ttl = 0;
2657 unsigned encap_limit = 0;
2658
2659 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2660 if (!nlm)
2661 return -1;
2662
2663 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2664 nla_put_string(nlm, IFLA_IFNAME, name);
2665
2666 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2667 if (!linkinfo) {
2668 ret = -ENOMEM;
2669 goto failure;
2670 }
2671
2672 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2673 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2674 if (!infodata) {
2675 ret = -ENOMEM;
2676 goto failure;
2677 }
2678
2679 if (link)
2680 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2681
2682 if ((cur = tb[TUNNEL_ATTR_TTL]))
2683 ttl = blobmsg_get_u32(cur);
2684
2685 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2686 char *str = blobmsg_get_string(cur);
2687 if (strcmp(str, "inherit")) {
2688 unsigned uval;
2689
2690 if (!system_tos_aton(str, &uval)) {
2691 ret = -EINVAL;
2692 goto failure;
2693 }
2694
2695 if (v6)
2696 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2697 else
2698 tos = uval;
2699 } else {
2700 if (v6)
2701 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
2702 else
2703 tos = 1;
2704 }
2705 }
2706
2707 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2708 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2709
2710 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2711 blobmsg_data(cur), blobmsg_len(cur));
2712
2713 if ((cur = tb_data[GRE_DATA_IKEY])) {
2714 if ((ikey = blobmsg_get_u32(cur)))
2715 iflags |= GRE_KEY;
2716 }
2717
2718 if ((cur = tb_data[GRE_DATA_OKEY])) {
2719 if ((okey = blobmsg_get_u32(cur)))
2720 oflags |= GRE_KEY;
2721 }
2722
2723 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2724 if (blobmsg_get_bool(cur))
2725 iflags |= GRE_CSUM;
2726 }
2727
2728 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2729 if (blobmsg_get_bool(cur))
2730 oflags |= GRE_CSUM;
2731 }
2732
2733 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2734 if (blobmsg_get_bool(cur))
2735 iflags |= GRE_SEQ;
2736 }
2737
2738 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2739 if (blobmsg_get_bool(cur))
2740 oflags |= GRE_SEQ;
2741 }
2742
2743 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
2744 char *str = blobmsg_get_string(cur);
2745
2746 if (strcmp(str, "ignore")) {
2747 char *e;
2748
2749 encap_limit = strtoul(str, &e, 0);
2750
2751 if (e == str || *e || encap_limit > 255) {
2752 ret = -EINVAL;
2753 goto failure;
2754 }
2755
2756 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2757 }
2758 }
2759 }
2760
2761 if (v6) {
2762 struct in6_addr in6buf;
2763 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2764 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2765 ret = -EINVAL;
2766 goto failure;
2767 }
2768 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2769 }
2770
2771 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2772 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2773 ret = -EINVAL;
2774 goto failure;
2775 }
2776 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2777 }
2778
2779 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
2780 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
2781
2782 if (flowinfo)
2783 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2784
2785 if (flags6)
2786 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
2787
2788 if (!ttl)
2789 ttl = 64;
2790 } else {
2791 struct in_addr inbuf;
2792 bool set_df = true;
2793
2794 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2795 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2796 ret = -EINVAL;
2797 goto failure;
2798 }
2799 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2800 }
2801
2802 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2803 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2804 ret = -EINVAL;
2805 goto failure;
2806 }
2807 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2808
2809 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2810 if (!okey) {
2811 okey = inbuf.s_addr;
2812 oflags |= GRE_KEY;
2813 }
2814
2815 if (!ikey) {
2816 ikey = inbuf.s_addr;
2817 iflags |= GRE_KEY;
2818 }
2819 }
2820 }
2821
2822 if ((cur = tb[TUNNEL_ATTR_DF]))
2823 set_df = blobmsg_get_bool(cur);
2824
2825 if (!set_df) {
2826 /* ttl != 0 and nopmtudisc are incompatible */
2827 if (ttl) {
2828 ret = -EINVAL;
2829 goto failure;
2830 }
2831 } else if (!ttl)
2832 ttl = 64;
2833
2834 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2835
2836 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2837 }
2838
2839 if (ttl)
2840 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2841
2842 if (oflags)
2843 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2844
2845 if (iflags)
2846 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2847
2848 if (okey)
2849 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2850
2851 if (ikey)
2852 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2853
2854 nla_nest_end(nlm, infodata);
2855 nla_nest_end(nlm, linkinfo);
2856
2857 return system_rtnl_call(nlm);
2858
2859 failure:
2860 nlmsg_free(nlm);
2861 return ret;
2862 }
2863 #endif
2864
2865 #ifdef IFLA_VTI_MAX
2866 static int system_add_vti_tunnel(const char *name, const char *kind,
2867 const unsigned int link, struct blob_attr **tb, bool v6)
2868 {
2869 struct nl_msg *nlm;
2870 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2871 struct blob_attr *cur;
2872 int ret = 0;
2873
2874 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2875 if (!nlm)
2876 return -1;
2877
2878 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2879 nla_put_string(nlm, IFLA_IFNAME, name);
2880
2881 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2882 if (!linkinfo) {
2883 ret = -ENOMEM;
2884 goto failure;
2885 }
2886
2887 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2888 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2889 if (!infodata) {
2890 ret = -ENOMEM;
2891 goto failure;
2892 }
2893
2894 if (link)
2895 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2896
2897 if (v6) {
2898 struct in6_addr in6buf;
2899 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2900 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2901 ret = -EINVAL;
2902 goto failure;
2903 }
2904 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2905 }
2906
2907 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2908 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2909 ret = -EINVAL;
2910 goto failure;
2911 }
2912 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2913 }
2914
2915 } else {
2916 struct in_addr inbuf;
2917
2918 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2919 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2920 ret = -EINVAL;
2921 goto failure;
2922 }
2923 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2924 }
2925
2926 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2927 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2928 ret = -EINVAL;
2929 goto failure;
2930 }
2931 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2932 }
2933
2934 }
2935
2936 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2937 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2938 uint32_t ikey = 0, okey = 0;
2939
2940 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2941 blobmsg_data(cur), blobmsg_len(cur));
2942
2943 if ((cur = tb_data[VTI_DATA_IKEY])) {
2944 if ((ikey = blobmsg_get_u32(cur)))
2945 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2946 }
2947
2948 if ((cur = tb_data[VTI_DATA_OKEY])) {
2949 if ((okey = blobmsg_get_u32(cur)))
2950 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2951 }
2952 }
2953
2954 nla_nest_end(nlm, infodata);
2955 nla_nest_end(nlm, linkinfo);
2956
2957 return system_rtnl_call(nlm);
2958
2959 failure:
2960 nlmsg_free(nlm);
2961 return ret;
2962 }
2963 #endif
2964
2965 #ifdef IFLA_XFRM_MAX
2966 static int system_add_xfrm_tunnel(const char *name, const char *kind,
2967 const unsigned int link, struct blob_attr **tb)
2968 {
2969 struct nl_msg *nlm;
2970 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2971 struct blob_attr *cur;
2972 int ret = 0;
2973
2974 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2975 if (!nlm)
2976 return -1;
2977
2978 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2979 nla_put_string(nlm, IFLA_IFNAME, name);
2980
2981 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2982 if (!linkinfo) {
2983 ret = -ENOMEM;
2984 goto failure;
2985 }
2986
2987 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2988 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2989 if (!infodata) {
2990 ret = -ENOMEM;
2991 goto failure;
2992 }
2993
2994 if (link)
2995 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
2996
2997 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2998 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
2999 uint32_t if_id = 0;
3000
3001 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3002 blobmsg_data(cur), blobmsg_len(cur));
3003
3004 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3005 if ((if_id = blobmsg_get_u32(cur)))
3006 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3007 }
3008
3009 }
3010
3011 nla_nest_end(nlm, infodata);
3012 nla_nest_end(nlm, linkinfo);
3013
3014 return system_rtnl_call(nlm);
3015
3016 failure:
3017 nlmsg_free(nlm);
3018 return ret;
3019 }
3020 #endif
3021
3022 #ifdef IFLA_VXLAN_MAX
3023 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3024 {
3025 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3026 struct nl_msg *msg;
3027 struct nlattr *linkinfo, *data;
3028 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3029 struct blob_attr *cur;
3030 int ret = 0;
3031
3032 if ((cur = tb[TUNNEL_ATTR_DATA]))
3033 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3034 blobmsg_data(cur), blobmsg_len(cur));
3035 else
3036 return -EINVAL;
3037
3038 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3039
3040 if (!msg)
3041 return -1;
3042
3043 nlmsg_append(msg, &iim, sizeof(iim), 0);
3044
3045 nla_put_string(msg, IFLA_IFNAME, name);
3046
3047 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3048 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3049 if (!ea) {
3050 ret = -EINVAL;
3051 goto failure;
3052 }
3053
3054 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3055 }
3056
3057 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3058 uint32_t mtu = blobmsg_get_u32(cur);
3059 nla_put_u32(msg, IFLA_MTU, mtu);
3060 }
3061
3062 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3063 ret = -ENOMEM;
3064 goto failure;
3065 }
3066
3067 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3068
3069 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3070 ret = -ENOMEM;
3071 goto failure;
3072 }
3073
3074 if (link)
3075 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3076
3077 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3078 uint32_t id = blobmsg_get_u32(cur);
3079 if (id >= (1u << 24) - 1) {
3080 ret = -EINVAL;
3081 goto failure;
3082 }
3083
3084 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3085 }
3086
3087 if (v6) {
3088 struct in6_addr in6buf;
3089 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3090 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3091 ret = -EINVAL;
3092 goto failure;
3093 }
3094 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3095 }
3096
3097 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3098 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3099 ret = -EINVAL;
3100 goto failure;
3101 }
3102 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3103 }
3104 } else {
3105 struct in_addr inbuf;
3106
3107 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3108 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3109 ret = -EINVAL;
3110 goto failure;
3111 }
3112 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3113 }
3114
3115 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3116 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3117 ret = -EINVAL;
3118 goto failure;
3119 }
3120 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3121 }
3122 }
3123
3124 uint32_t port = 4789;
3125 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3126 port = blobmsg_get_u32(cur);
3127 if (port < 1 || port > 65535) {
3128 ret = -EINVAL;
3129 goto failure;
3130 }
3131 }
3132 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3133
3134 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
3135 bool rxcsum = blobmsg_get_bool(cur);
3136 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
3137 }
3138
3139 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
3140 bool txcsum = blobmsg_get_bool(cur);
3141 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
3142 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
3143 }
3144
3145 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3146 char *str = blobmsg_get_string(cur);
3147 unsigned tos = 1;
3148
3149 if (strcmp(str, "inherit")) {
3150 if (!system_tos_aton(str, &tos)) {
3151 ret = -EINVAL;
3152 goto failure;
3153 }
3154 }
3155
3156 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3157 }
3158
3159 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3160 uint32_t ttl = blobmsg_get_u32(cur);
3161 if (ttl < 1 || ttl > 255) {
3162 ret = -EINVAL;
3163 goto failure;
3164 }
3165
3166 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3167 }
3168
3169 nla_nest_end(msg, data);
3170 nla_nest_end(msg, linkinfo);
3171
3172 ret = system_rtnl_call(msg);
3173 if (ret)
3174 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3175
3176 return ret;
3177
3178 failure:
3179 nlmsg_free(msg);
3180 return ret;
3181 }
3182 #endif
3183
3184 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3185 {
3186 struct blob_attr *cur;
3187 int ret = 0;
3188
3189 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3190 return -1;
3191
3192 #ifdef SIOCADD6RD
3193 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3194 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3195 unsigned int mask;
3196 struct ip_tunnel_6rd p6;
3197
3198 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3199 blobmsg_data(cur), blobmsg_len(cur));
3200
3201 memset(&p6, 0, sizeof(p6));
3202
3203 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3204 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3205 &p6.prefix, &mask) || mask > 128) {
3206 ret = -EINVAL;
3207 goto failure;
3208 }
3209
3210 p6.prefixlen = mask;
3211 }
3212
3213 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3214 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3215 &p6.relay_prefix, &mask) || mask > 32) {
3216 ret = -EINVAL;
3217 goto failure;
3218 }
3219
3220 p6.relay_prefixlen = mask;
3221 }
3222
3223 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3224 ret = -1;
3225 goto failure;
3226 }
3227 }
3228 #endif
3229
3230 return ret;
3231
3232 failure:
3233 __system_del_ip_tunnel(name, tb);
3234 return ret;
3235 }
3236
3237 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3238 {
3239 struct blob_attr *cur;
3240 bool set_df = true;
3241 struct ip_tunnel_parm p = {
3242 .link = link,
3243 .iph = {
3244 .version = 4,
3245 .ihl = 5,
3246 .protocol = proto,
3247 }
3248 };
3249
3250 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3251 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3252 return -EINVAL;
3253
3254 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3255 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3256 return -EINVAL;
3257
3258 if ((cur = tb[TUNNEL_ATTR_DF]))
3259 set_df = blobmsg_get_bool(cur);
3260
3261 if ((cur = tb[TUNNEL_ATTR_TTL]))
3262 p.iph.ttl = blobmsg_get_u32(cur);
3263
3264 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3265 char *str = blobmsg_get_string(cur);
3266 if (strcmp(str, "inherit")) {
3267 unsigned uval;
3268
3269 if (!system_tos_aton(str, &uval))
3270 return -EINVAL;
3271
3272 p.iph.tos = uval;
3273 } else
3274 p.iph.tos = 1;
3275 }
3276
3277 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3278 /* ttl !=0 and nopmtudisc are incompatible */
3279 if (p.iph.ttl && p.iph.frag_off == 0)
3280 return -EINVAL;
3281
3282 strncpy(p.name, name, sizeof(p.name) - 1);
3283
3284 switch (p.iph.protocol) {
3285 case IPPROTO_IPIP:
3286 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3287 case IPPROTO_IPV6:
3288 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3289 default:
3290 break;
3291 }
3292 return -1;
3293 }
3294
3295 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3296 {
3297 struct blob_attr *cur;
3298 const char *str;
3299
3300 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3301 return -EINVAL;
3302 str = blobmsg_data(cur);
3303
3304 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3305 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3306 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3307 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3308 !strcmp(str, "xfrm"))
3309 return system_link_del(name);
3310 else
3311 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3312 }
3313
3314 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3315 {
3316 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3317
3318 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3319 blob_data(attr), blob_len(attr));
3320
3321 return __system_del_ip_tunnel(name, tb);
3322 }
3323
3324 int system_update_ipv6_mtu(struct device *dev, int mtu)
3325 {
3326 int ret = -1;
3327 char buf[64];
3328 int fd;
3329
3330 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3331 dev->ifname);
3332
3333 fd = open(buf, O_RDWR);
3334 if (fd < 0)
3335 return ret;
3336
3337 if (!mtu) {
3338 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3339 if (len < 0)
3340 goto out;
3341
3342 buf[len] = 0;
3343 ret = atoi(buf);
3344 } else {
3345 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3346 ret = mtu;
3347 }
3348
3349 out:
3350 close(fd);
3351 return ret;
3352 }
3353
3354 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3355 {
3356 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3357 struct blob_attr *cur;
3358 const char *str;
3359
3360 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3361 blob_data(attr), blob_len(attr));
3362
3363 __system_del_ip_tunnel(name, tb);
3364
3365 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3366 return -EINVAL;
3367 str = blobmsg_data(cur);
3368
3369 unsigned int ttl = 0;
3370 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3371 ttl = blobmsg_get_u32(cur);
3372 if (ttl > 255)
3373 return -EINVAL;
3374 }
3375
3376 unsigned int link = 0;
3377 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3378 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3379 if (!iface)
3380 return -EINVAL;
3381
3382 if (iface->l3_dev.dev)
3383 link = iface->l3_dev.dev->ifindex;
3384 }
3385
3386 if (!strcmp(str, "sit"))
3387 return system_add_sit_tunnel(name, link, tb);
3388 #ifdef IFLA_IPTUN_MAX
3389 else if (!strcmp(str, "ipip6")) {
3390 return system_add_ip6_tunnel(name, link, tb);
3391 } else if (!strcmp(str, "greip")) {
3392 return system_add_gre_tunnel(name, "gre", link, tb, false);
3393 } else if (!strcmp(str, "gretapip")) {
3394 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3395 } else if (!strcmp(str, "greip6")) {
3396 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3397 } else if (!strcmp(str, "gretapip6")) {
3398 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3399 #ifdef IFLA_VTI_MAX
3400 } else if (!strcmp(str, "vtiip")) {
3401 return system_add_vti_tunnel(name, "vti", link, tb, false);
3402 } else if (!strcmp(str, "vtiip6")) {
3403 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3404 #endif
3405 #ifdef IFLA_XFRM_MAX
3406 } else if (!strcmp(str, "xfrm")) {
3407 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3408 #endif
3409 #ifdef IFLA_VXLAN_MAX
3410 } else if(!strcmp(str, "vxlan")) {
3411 return system_add_vxlan(name, link, tb, false);
3412 } else if(!strcmp(str, "vxlan6")) {
3413 return system_add_vxlan(name, link, tb, true);
3414 #endif
3415 #endif
3416 } else if (!strcmp(str, "ipip")) {
3417 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3418 }
3419 else
3420 return -EINVAL;
3421
3422 return 0;
3423 }
OpenWrt Network interface configuration daemon