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