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system-linux: create bridge devices using netlink
[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/in.h>
32 #include <netinet/ether.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
93 static char dev_buf[256];
94 static const char *proc_path = "/proc";
95 static const char *sysfs_path = "/sys";
96
97 static void
98 handler_nl_event(struct uloop_fd *u, unsigned int events)
99 {
100 struct event_socket *ev = container_of(u, struct event_socket, uloop);
101 int err;
102 socklen_t errlen = sizeof(err);
103
104 if (!u->error) {
105 nl_recvmsgs_default(ev->sock);
106 return;
107 }
108
109 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
110 goto abort;
111
112 switch(err) {
113 case ENOBUFS:
114 /* Increase rx buffer size on netlink socket */
115 ev->bufsize *= 2;
116 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
117 goto abort;
118
119 /* Request full dump since some info got dropped */
120 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
121 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
122 break;
123
124 default:
125 goto abort;
126 }
127 u->error = false;
128 return;
129
130 abort:
131 uloop_fd_delete(&ev->uloop);
132 return;
133 }
134
135 static struct nl_sock *
136 create_socket(int protocol, int groups)
137 {
138 struct nl_sock *sock;
139
140 sock = nl_socket_alloc();
141 if (!sock)
142 return NULL;
143
144 if (groups)
145 nl_join_groups(sock, groups);
146
147 if (nl_connect(sock, protocol)) {
148 nl_socket_free(sock);
149 return NULL;
150 }
151
152 return sock;
153 }
154
155 static bool
156 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
157 uloop_fd_handler cb, int flags)
158 {
159 ev->sock = create_socket(protocol, groups);
160 if (!ev->sock)
161 return false;
162
163 ev->uloop.fd = nl_socket_get_fd(ev->sock);
164 ev->uloop.cb = cb;
165 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
166 return false;
167
168 return true;
169 }
170
171 static bool
172 create_event_socket(struct event_socket *ev, int protocol,
173 int (*cb)(struct nl_msg *msg, void *arg))
174 {
175 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
176 return false;
177
178 /* Install the valid custom callback handler */
179 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
180
181 /* Disable sequence number checking on event sockets */
182 nl_socket_disable_seq_check(ev->sock);
183
184 /* Increase rx buffer size to 65K on event sockets */
185 ev->bufsize = 65535;
186 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
187 return false;
188
189 return true;
190 }
191
192 static bool
193 create_hotplug_event_socket(struct event_socket *ev, int protocol,
194 void (*cb)(struct uloop_fd *u, unsigned int events))
195 {
196 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
197 return false;
198
199 /* Increase rx buffer size to 65K on event sockets */
200 ev->bufsize = 65535;
201 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
202 return false;
203
204 return true;
205 }
206
207 static bool
208 system_rtn_aton(const char *src, unsigned int *dst)
209 {
210 char *e;
211 unsigned int n;
212
213 if (!strcmp(src, "local"))
214 n = RTN_LOCAL;
215 else if (!strcmp(src, "nat"))
216 n = RTN_NAT;
217 else if (!strcmp(src, "broadcast"))
218 n = RTN_BROADCAST;
219 else if (!strcmp(src, "anycast"))
220 n = RTN_ANYCAST;
221 else if (!strcmp(src, "multicast"))
222 n = RTN_MULTICAST;
223 else if (!strcmp(src, "prohibit"))
224 n = RTN_PROHIBIT;
225 else if (!strcmp(src, "unreachable"))
226 n = RTN_UNREACHABLE;
227 else if (!strcmp(src, "blackhole"))
228 n = RTN_BLACKHOLE;
229 else if (!strcmp(src, "xresolve"))
230 n = RTN_XRESOLVE;
231 else if (!strcmp(src, "unicast"))
232 n = RTN_UNICAST;
233 else if (!strcmp(src, "throw"))
234 n = RTN_THROW;
235 else if (!strcmp(src, "failed_policy"))
236 n = RTN_FAILED_POLICY;
237 else {
238 n = strtoul(src, &e, 0);
239 if (!e || *e || e == src || n > 255)
240 return false;
241 }
242
243 *dst = n;
244 return true;
245 }
246
247 static bool
248 system_tos_aton(const char *src, unsigned *dst)
249 {
250 char *e;
251
252 *dst = strtoul(src, &e, 16);
253 if (e == src || *e || *dst > 255)
254 return false;
255
256 return true;
257 }
258
259 int system_init(void)
260 {
261 static struct event_socket rtnl_event;
262 static struct event_socket hotplug_event;
263
264 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
265 system_fd_set_cloexec(sock_ioctl);
266
267 /* Prepare socket for routing / address control */
268 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
269 if (!sock_rtnl)
270 return -1;
271
272 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
273 return -1;
274
275 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
276 handle_hotplug_event))
277 return -1;
278
279 /* Receive network link events form kernel */
280 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
281
282 return 0;
283 }
284
285 static void write_file(const char *path, const char *val)
286 {
287 int fd;
288
289 fd = open(path, O_WRONLY);
290 if (fd < 0)
291 return;
292
293 if (write(fd, val, strlen(val))) {}
294 close(fd);
295 }
296
297 static int read_file(const char *path, char *buf, const size_t buf_sz)
298 {
299 int fd = -1, ret = -1;
300
301 fd = open(path, O_RDONLY);
302 if (fd < 0)
303 goto out;
304
305 ssize_t len = read(fd, buf, buf_sz - 1);
306 if (len < 0)
307 goto out;
308
309 ret = buf[len] = 0;
310
311 out:
312 if (fd >= 0)
313 close(fd);
314
315 return ret;
316 }
317
318
319 static const char *
320 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
321 {
322 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
323
324 return dev_buf;
325 }
326
327 static const char *
328 dev_sysfs_path(const char *ifname, const char *file)
329 {
330 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
331
332 return dev_buf;
333 }
334
335 static void
336 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
337 const char *val)
338 {
339 write_file(dev_sysctl_path(prefix, ifname, file), val);
340 }
341
342 static int
343 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
344 char *buf, size_t buf_sz)
345 {
346 return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
347 }
348
349 static void
350 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
351 {
352 if (!val)
353 return;
354
355 write_file(dev_sysfs_path(ifname, file), val);
356 }
357
358 static void
359 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
360 {
361 char buf[16];
362
363 snprintf(buf, sizeof(buf), "%d", val);
364 system_set_dev_sysfs(file, ifname, buf);
365 }
366
367 static int
368 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
369 {
370 return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
371 }
372
373 static void system_set_disable_ipv6(struct device *dev, const char *val)
374 {
375 system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
376 }
377
378 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
379 {
380 system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
381 }
382
383 static void system_set_rpfilter(struct device *dev, const char *val)
384 {
385 system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
386 }
387
388 static void system_set_acceptlocal(struct device *dev, const char *val)
389 {
390 system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
391 }
392
393 static void system_set_igmpversion(struct device *dev, const char *val)
394 {
395 system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
396 }
397
398 static void system_set_mldversion(struct device *dev, const char *val)
399 {
400 system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
401 }
402
403 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
404 {
405 system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
406 }
407
408 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
409 {
410 system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
411 }
412
413 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
414 {
415 system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
416 }
417
418 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
419 {
420 system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
421 }
422
423 static void system_set_neigh4locktime(struct device *dev, const char *val)
424 {
425 system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
426 }
427
428 static void system_set_dadtransmits(struct device *dev, const char *val)
429 {
430 system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
431 }
432
433 static void system_set_sendredirects(struct device *dev, const char *val)
434 {
435 system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
436 }
437
438 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
439 {
440 system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
441 }
442
443 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
444 {
445 system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
446 }
447
448 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
449 {
450 system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
451 }
452
453 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
454 {
455 system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
456 }
457
458 static void system_set_arp_accept(struct device *dev, const char *val)
459 {
460 system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
461 }
462
463 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
464 {
465 system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
466 }
467
468 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
469 {
470 system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
471 }
472
473 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
474 {
475 system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
476 }
477
478 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
479 {
480 system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
481 }
482
483 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
484 {
485 system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
486 }
487
488 static void system_bridge_set_isolated(struct device *dev, const char *val)
489 {
490 system_set_dev_sysfs("brport/isolated", dev->ifname, val);
491 }
492
493 static void system_bridge_set_multicast_router(struct device *dev, const char *val)
494 {
495 system_set_dev_sysfs("brport/multicast_router", dev->ifname, val);
496 }
497
498 void system_bridge_set_stp_state(struct device *dev, bool val)
499 {
500 const char *valstr = val ? "1" : "0";
501
502 system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
503 }
504
505 static void system_bridge_set_learning(struct device *dev, const char *val)
506 {
507 system_set_dev_sysfs("brport/learning", dev->ifname, val);
508 }
509
510 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
511 {
512 system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
513 }
514
515 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
516 {
517 return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
518 dev->ifname, buf, buf_sz);
519 }
520
521 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
522 {
523 return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
524 dev->ifname, buf, buf_sz);
525 }
526
527 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
528 {
529 return system_get_dev_sysctl("ipv4/conf", "rp_filter",
530 dev->ifname, buf, buf_sz);
531 }
532
533 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
534 {
535 return system_get_dev_sysctl("ipv4/conf", "accept_local",
536 dev->ifname, buf, buf_sz);
537 }
538
539 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
540 {
541 return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
542 dev->ifname, buf, buf_sz);
543 }
544
545 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
546 {
547 return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
548 dev->ifname, buf, buf_sz);
549 }
550
551 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
552 {
553 return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
554 dev->ifname, buf, buf_sz);
555 }
556
557 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
558 {
559 return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
560 dev->ifname, buf, buf_sz);
561 }
562
563 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
564 {
565 return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
566 dev->ifname, buf, buf_sz);
567 }
568
569 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
570 {
571 return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
572 dev->ifname, buf, buf_sz);
573 }
574
575 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
576 {
577 return system_get_dev_sysctl("ipv4/neigh", "locktime",
578 dev->ifname, buf, buf_sz);
579 }
580
581 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
582 {
583 return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
584 dev->ifname, buf, buf_sz);
585 }
586
587 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
588 {
589 return system_get_dev_sysctl("ipv4/conf", "send_redirects",
590 dev->ifname, buf, buf_sz);
591 }
592
593
594 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
595 {
596 return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
597 dev->ifname, buf, buf_sz);
598 }
599
600 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
601 {
602 return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
603 dev->ifname, buf, buf_sz);
604 }
605
606 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
607 {
608 return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
609 dev->ifname, buf, buf_sz);
610 }
611
612 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
613 {
614 return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
615 dev->ifname, buf, buf_sz);
616 }
617
618 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
619 {
620 return system_get_dev_sysctl("ipv4/conf", "arp_accept",
621 dev->ifname, buf, buf_sz);
622 }
623
624 /* Evaluate netlink messages */
625 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
626 {
627 struct nlmsghdr *nh = nlmsg_hdr(msg);
628 struct nlattr *nla[__IFLA_MAX];
629 int link_state = 0;
630 char buf[10];
631
632 if (nh->nlmsg_type != RTM_NEWLINK)
633 goto out;
634
635 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
636 if (!nla[IFLA_IFNAME])
637 goto out;
638
639 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
640 if (!dev)
641 goto out;
642
643 if (!system_get_dev_sysfs("carrier", dev->ifname, buf, sizeof(buf)))
644 link_state = strtoul(buf, NULL, 0);
645
646 if (dev->type == &simple_device_type)
647 device_set_present(dev, true);
648
649 device_set_link(dev, link_state ? true : false);
650
651 out:
652 return 0;
653 }
654
655 static void
656 handle_hotplug_msg(char *data, int size)
657 {
658 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
659 char *cur, *end, *sep;
660 int skip;
661 bool add;
662
663 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
664 add = true;
665 else if (!strncmp(data, "remove@", 7))
666 add = false;
667 else
668 return;
669
670 skip = strlen(data) + 1;
671 end = data + size;
672
673 for (cur = data + skip; cur < end; cur += skip) {
674 skip = strlen(cur) + 1;
675
676 sep = strchr(cur, '=');
677 if (!sep)
678 continue;
679
680 *sep = 0;
681 if (!strcmp(cur, "INTERFACE"))
682 interface = sep + 1;
683 else if (!strcmp(cur, "SUBSYSTEM")) {
684 subsystem = sep + 1;
685 if (strcmp(subsystem, "net") != 0)
686 return;
687 } else if (!strcmp(cur, "DEVPATH_OLD")) {
688 interface_old = strrchr(sep + 1, '/');
689 if (interface_old)
690 interface_old++;
691 }
692 }
693
694 if (!subsystem || !interface)
695 return;
696
697 if (interface_old)
698 device_hotplug_event(interface_old, false);
699
700 device_hotplug_event(interface, add);
701 }
702
703 static void
704 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
705 {
706 struct event_socket *ev = container_of(u, struct event_socket, uloop);
707 struct sockaddr_nl nla;
708 unsigned char *buf = NULL;
709 int size;
710 int err;
711 socklen_t errlen = sizeof(err);
712
713 if (!u->error) {
714 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
715 if (nla.nl_pid == 0)
716 handle_hotplug_msg((char *) buf, size);
717
718 free(buf);
719 }
720 return;
721 }
722
723 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
724 goto abort;
725
726 switch(err) {
727 case ENOBUFS:
728 /* Increase rx buffer size on netlink socket */
729 ev->bufsize *= 2;
730 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
731 goto abort;
732 break;
733
734 default:
735 goto abort;
736 }
737 u->error = false;
738 return;
739
740 abort:
741 uloop_fd_delete(&ev->uloop);
742 return;
743 }
744
745 static int system_rtnl_call(struct nl_msg *msg)
746 {
747 int ret;
748
749 ret = nl_send_auto_complete(sock_rtnl, msg);
750 nlmsg_free(msg);
751
752 if (ret < 0)
753 return ret;
754
755 return nl_wait_for_ack(sock_rtnl);
756 }
757
758 int system_bridge_delbr(struct device *bridge)
759 {
760 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
761 }
762
763 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
764 {
765 struct ifreq ifr;
766
767 memset(&ifr, 0, sizeof(ifr));
768 if (dev)
769 ifr.ifr_ifindex = dev->ifindex;
770 else
771 ifr.ifr_data = data;
772 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
773 return ioctl(sock_ioctl, cmd, &ifr);
774 }
775
776 static bool system_is_bridge(const char *name)
777 {
778 struct stat st;
779
780 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
781 }
782
783 static char *system_get_bridge(const char *name, char *buf, int buflen)
784 {
785 char *path;
786 ssize_t len = -1;
787 glob_t gl;
788
789 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
790 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
791 return NULL;
792
793 if (gl.gl_pathc > 0)
794 len = readlink(gl.gl_pathv[0], buf, buflen);
795
796 globfree(&gl);
797
798 if (len < 0)
799 return NULL;
800
801 buf[len] = 0;
802 path = strrchr(buf, '/');
803 if (!path)
804 return NULL;
805
806 return path + 1;
807 }
808
809 static void
810 system_bridge_set_wireless(struct device *bridge, struct device *dev)
811 {
812 bool mcast_to_ucast = dev->wireless_ap;
813 bool hairpin;
814
815 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
816 !bridge->settings.multicast_to_unicast)
817 mcast_to_ucast = false;
818
819 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
820 if (dev->wireless_isolate)
821 hairpin = false;
822
823 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
824 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
825 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
826 }
827
828 int system_bridge_addif(struct device *bridge, struct device *dev)
829 {
830 char buf[64];
831 char *oldbr;
832 int tries = 0;
833 int ret;
834
835 retry:
836 ret = 0;
837 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
838 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
839 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
840 tries++;
841 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
842 dev->ifname, bridge->ifname, tries, strerror(errno));
843 if (tries <= 3)
844 goto retry;
845 }
846
847 if (dev->wireless)
848 system_bridge_set_wireless(bridge, dev);
849
850 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
851 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
852 system_bridge_set_multicast_router(dev, buf);
853 }
854
855 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
856 dev->settings.multicast_fast_leave)
857 system_bridge_set_multicast_fast_leave(dev, "1");
858
859 if (dev->settings.flags & DEV_OPT_LEARNING &&
860 !dev->settings.learning)
861 system_bridge_set_learning(dev, "0");
862
863 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
864 !dev->settings.unicast_flood)
865 system_bridge_set_unicast_flood(dev, "0");
866
867 if (dev->settings.flags & DEV_OPT_ISOLATE &&
868 dev->settings.isolate)
869 system_bridge_set_isolated(dev, "1");
870
871 if (dev->bpdu_filter)
872 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
873
874 return ret;
875 }
876
877 int system_bridge_delif(struct device *bridge, struct device *dev)
878 {
879 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
880 }
881
882 int system_bridge_vlan(const char *iface, uint16_t vid, bool add, unsigned int vflags)
883 {
884 struct ifinfomsg ifi = { .ifi_family = PF_BRIDGE, };
885 struct bridge_vlan_info vinfo = { .vid = vid, };
886 unsigned short flags = 0;
887 struct nlattr *afspec;
888 struct nl_msg *nlm;
889 int ret = 0;
890
891 ifi.ifi_index = if_nametoindex(iface);
892 if (!ifi.ifi_index)
893 return -1;
894
895 nlm = nlmsg_alloc_simple(add ? RTM_SETLINK : RTM_DELLINK, NLM_F_REQUEST);
896 if (!nlm)
897 return -1;
898
899 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
900
901 if (vflags & BRVLAN_F_SELF)
902 flags |= BRIDGE_FLAGS_SELF;
903
904 if (vflags & BRVLAN_F_PVID)
905 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
906
907 if (vflags & BRVLAN_F_UNTAGGED)
908 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
909
910 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
911 if (!afspec) {
912 ret = -ENOMEM;
913 goto failure;
914 }
915
916 if (flags)
917 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
918
919 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
920 nla_nest_end(nlm, afspec);
921
922 return system_rtnl_call(nlm);
923
924 failure:
925 nlmsg_free(nlm);
926 return ret;
927 }
928
929 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
930 {
931 const char *ifname = dev->ifname;
932 struct blob_attr *cur;
933 char op = cfg ? '+' : '-';
934 char buf[64];
935 int rem;
936
937 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
938 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
939 write_file(dev_buf, buf);
940
941 if (!cfg)
942 return 0;
943
944 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
945
946 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
947
948 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
949 cfg->policy == BONDING_MODE_BALANCE_TLB ||
950 cfg->policy == BONDING_MODE_8023AD)
951 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
952
953 if (cfg->policy == BONDING_MODE_8023AD) {
954 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
955 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
956 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
957 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
958 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
959 }
960
961 if (cfg->policy == BONDING_MODE_BALANCE_RR)
962 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
963
964 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
965 cfg->policy == BONDING_MODE_BALANCE_ALB)
966 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
967
968 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
969 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
970 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
971 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
972 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
973 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
974
975 system_set_dev_sysfs_int((cfg->monitor_arp ?
976 "bonding/arp_interval" :
977 "bonding/miimon"), ifname, cfg->monitor_interval);
978
979 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
980 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
981 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
982 }
983
984 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
985 if (cfg->policy < BONDING_MODE_8023AD)
986 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
987 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
988 if (!cfg->monitor_arp && cfg->monitor_interval) {
989 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
990 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
991 }
992
993 return 0;
994 }
995
996 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
997 {
998 const char *port_name = port->ifname;
999 const char op_ch = add ? '+' : '-';
1000 char buf[IFNAMSIZ + 2];
1001
1002 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1003 system_if_down(port);
1004 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1005 system_if_up(port);
1006
1007 if (primary)
1008 system_set_dev_sysfs("bonding/primary", dev->ifname,
1009 add ? port_name : "");
1010
1011 return 0;
1012 }
1013
1014 int system_if_resolve(struct device *dev)
1015 {
1016 struct ifreq ifr;
1017
1018 memset(&ifr, 0, sizeof(ifr));
1019 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1020 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1021 return ifr.ifr_ifindex;
1022 else
1023 return 0;
1024 }
1025
1026 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1027 {
1028 struct ifreq ifr;
1029
1030 memset(&ifr, 0, sizeof(ifr));
1031 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1032 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1033 return -1;
1034
1035 ifr.ifr_flags |= add;
1036 ifr.ifr_flags &= ~rem;
1037 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1038 }
1039
1040 struct clear_data {
1041 struct nl_msg *msg;
1042 struct device *dev;
1043 int type;
1044 int size;
1045 int af;
1046 };
1047
1048
1049 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1050 {
1051 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1052
1053 return ifa->ifa_index == ifindex;
1054 }
1055
1056 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1057 {
1058 struct rtmsg *r = NLMSG_DATA(hdr);
1059 struct nlattr *tb[__RTA_MAX];
1060
1061 if (r->rtm_protocol == RTPROT_KERNEL &&
1062 r->rtm_family == AF_INET6)
1063 return false;
1064
1065 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1066 if (!tb[RTA_OIF])
1067 return false;
1068
1069 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1070 }
1071
1072 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1073 {
1074 return true;
1075 }
1076
1077 static int cb_clear_event(struct nl_msg *msg, void *arg)
1078 {
1079 struct clear_data *clr = arg;
1080 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1081 bool (*cb)(struct nlmsghdr *, int ifindex);
1082 int type, ret;
1083
1084 switch(clr->type) {
1085 case RTM_GETADDR:
1086 type = RTM_DELADDR;
1087 if (hdr->nlmsg_type != RTM_NEWADDR)
1088 return NL_SKIP;
1089
1090 cb = check_ifaddr;
1091 break;
1092 case RTM_GETROUTE:
1093 type = RTM_DELROUTE;
1094 if (hdr->nlmsg_type != RTM_NEWROUTE)
1095 return NL_SKIP;
1096
1097 cb = check_route;
1098 break;
1099 case RTM_GETRULE:
1100 type = RTM_DELRULE;
1101 if (hdr->nlmsg_type != RTM_NEWRULE)
1102 return NL_SKIP;
1103
1104 cb = check_rule;
1105 break;
1106 default:
1107 return NL_SKIP;
1108 }
1109
1110 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1111 return NL_SKIP;
1112
1113 if (type == RTM_DELRULE)
1114 D(SYSTEM, "Remove a rule\n");
1115 else
1116 D(SYSTEM, "Remove %s from device %s\n",
1117 type == RTM_DELADDR ? "an address" : "a route",
1118 clr->dev->ifname);
1119
1120 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1121 hdr = nlmsg_hdr(clr->msg);
1122 hdr->nlmsg_type = type;
1123 hdr->nlmsg_flags = NLM_F_REQUEST;
1124
1125 nl_socket_disable_auto_ack(sock_rtnl);
1126 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1127 if (ret < 0) {
1128 if (type == RTM_DELRULE)
1129 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1130 else
1131 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1132 type == RTM_DELADDR ? "an address" : "a route",
1133 clr->dev->ifname, ret);
1134 }
1135
1136 nl_socket_enable_auto_ack(sock_rtnl);
1137
1138 return NL_SKIP;
1139 }
1140
1141 static int
1142 cb_finish_event(struct nl_msg *msg, void *arg)
1143 {
1144 int *pending = arg;
1145 *pending = 0;
1146 return NL_STOP;
1147 }
1148
1149 static int
1150 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1151 {
1152 int *pending = arg;
1153 *pending = err->error;
1154 return NL_STOP;
1155 }
1156
1157 static void
1158 system_if_clear_entries(struct device *dev, int type, int af)
1159 {
1160 struct clear_data clr;
1161 struct nl_cb *cb;
1162 struct rtmsg rtm = {
1163 .rtm_family = af,
1164 .rtm_flags = RTM_F_CLONED,
1165 };
1166 int flags = NLM_F_DUMP;
1167 int pending = 1;
1168
1169 clr.af = af;
1170 clr.dev = dev;
1171 clr.type = type;
1172 switch (type) {
1173 case RTM_GETADDR:
1174 case RTM_GETRULE:
1175 clr.size = sizeof(struct rtgenmsg);
1176 break;
1177 case RTM_GETROUTE:
1178 clr.size = sizeof(struct rtmsg);
1179 break;
1180 default:
1181 return;
1182 }
1183
1184 cb = nl_cb_alloc(NL_CB_DEFAULT);
1185 if (!cb)
1186 return;
1187
1188 clr.msg = nlmsg_alloc_simple(type, flags);
1189 if (!clr.msg)
1190 goto out;
1191
1192 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1193 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1194 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1195 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1196
1197 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1198 goto free;
1199
1200 while (pending > 0)
1201 nl_recvmsgs(sock_rtnl, cb);
1202
1203 free:
1204 nlmsg_free(clr.msg);
1205 out:
1206 nl_cb_put(cb);
1207 }
1208
1209 /*
1210 * Clear bridge (membership) state and bring down device
1211 */
1212 void system_if_clear_state(struct device *dev)
1213 {
1214 static char buf[256];
1215 char *bridge;
1216 device_set_ifindex(dev, system_if_resolve(dev));
1217
1218 if (dev->external || !dev->ifindex)
1219 return;
1220
1221 system_if_flags(dev->ifname, 0, IFF_UP);
1222
1223 if (system_is_bridge(dev->ifname)) {
1224 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1225 system_bridge_delbr(dev);
1226 return;
1227 }
1228
1229 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1230 if (bridge) {
1231 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1232 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1233 }
1234
1235 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1236 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1237 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1238 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1239 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1240 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1241 system_set_disable_ipv6(dev, "0");
1242 }
1243
1244 static inline unsigned long
1245 sec_to_jiffies(int val)
1246 {
1247 return (unsigned long) val * 100;
1248 }
1249
1250 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1251 {
1252 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1253 struct nlattr *linkinfo, *data;
1254 struct nl_msg *msg;
1255 uint64_t val;
1256 int rv;
1257
1258 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1259 if (!msg)
1260 return -1;
1261
1262 nlmsg_append(msg, &iim, sizeof(iim), 0);
1263
1264 nla_put_string(msg, IFLA_IFNAME, bridge->ifname);
1265
1266 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1267 goto nla_put_failure;
1268
1269 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1270
1271 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1272 goto nla_put_failure;
1273
1274 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1275 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1276 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1277 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1278 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1279
1280 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1281 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1282
1283 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1284 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1285 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1286 }
1287
1288 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1289 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1290
1291 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1292 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1293
1294 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1295 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1296
1297 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1298 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1299 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1300 val = cfg->robustness * cfg->query_interval +
1301 cfg->query_response_interval;
1302
1303 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1304
1305 val -= cfg->query_response_interval / 2;
1306
1307 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1308 }
1309
1310 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1311 val = cfg->query_interval / 4;
1312
1313 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1314 }
1315
1316 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1317 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1318 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1319 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1320
1321 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1322 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1323
1324 nla_nest_end(msg, data);
1325 nla_nest_end(msg, linkinfo);
1326
1327 rv = system_rtnl_call(msg);
1328 if (rv)
1329 D(SYSTEM, "Error adding bridge '%s': %d\n", bridge->ifname, rv);
1330
1331 return rv;
1332
1333 nla_put_failure:
1334 nlmsg_free(msg);
1335 return -ENOMEM;
1336 }
1337
1338 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1339 {
1340 struct nl_msg *msg;
1341 struct nlattr *linkinfo, *data;
1342 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1343 int i, rv;
1344 static const struct {
1345 const char *name;
1346 enum macvlan_mode val;
1347 } modes[] = {
1348 { "private", MACVLAN_MODE_PRIVATE },
1349 { "vepa", MACVLAN_MODE_VEPA },
1350 { "bridge", MACVLAN_MODE_BRIDGE },
1351 { "passthru", MACVLAN_MODE_PASSTHRU },
1352 };
1353
1354 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1355
1356 if (!msg)
1357 return -1;
1358
1359 nlmsg_append(msg, &iim, sizeof(iim), 0);
1360
1361 if (cfg->flags & MACVLAN_OPT_MACADDR)
1362 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1363 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1364 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1365
1366 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1367 goto nla_put_failure;
1368
1369 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1370
1371 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1372 goto nla_put_failure;
1373
1374 if (cfg->mode) {
1375 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1376 if (strcmp(cfg->mode, modes[i].name) != 0)
1377 continue;
1378
1379 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1380 break;
1381 }
1382 }
1383
1384 nla_nest_end(msg, data);
1385 nla_nest_end(msg, linkinfo);
1386
1387 rv = system_rtnl_call(msg);
1388 if (rv)
1389 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1390
1391 return rv;
1392
1393 nla_put_failure:
1394 nlmsg_free(msg);
1395 return -ENOMEM;
1396 }
1397
1398 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1399 {
1400 struct nl_msg *msg;
1401 struct ifinfomsg iim = {
1402 .ifi_family = AF_UNSPEC,
1403 };
1404
1405 if (!dev)
1406 return -1;
1407
1408 iim.ifi_index = system_if_resolve(dev);
1409 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1410
1411 if (!msg)
1412 return -1;
1413
1414 nlmsg_append(msg, &iim, sizeof(iim), 0);
1415 if (target_ifname)
1416 nla_put_string(msg, IFLA_IFNAME, target_ifname);
1417
1418 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1419 return system_rtnl_call(msg);
1420 }
1421
1422 static int system_link_del(const char *ifname)
1423 {
1424 struct nl_msg *msg;
1425 struct ifinfomsg iim = {
1426 .ifi_family = AF_UNSPEC,
1427 .ifi_index = 0,
1428 };
1429
1430 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1431
1432 if (!msg)
1433 return -1;
1434
1435 nlmsg_append(msg, &iim, sizeof(iim), 0);
1436 nla_put_string(msg, IFLA_IFNAME, ifname);
1437 return system_rtnl_call(msg);
1438 }
1439
1440 int system_macvlan_del(struct device *macvlan)
1441 {
1442 return system_link_del(macvlan->ifname);
1443 }
1444
1445 int system_netns_open(const pid_t target_ns)
1446 {
1447 char pid_net_path[PATH_MAX];
1448
1449 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1450
1451 return open(pid_net_path, O_RDONLY);
1452 }
1453
1454 int system_netns_set(int netns_fd)
1455 {
1456 return setns(netns_fd, CLONE_NEWNET);
1457 }
1458
1459 int system_veth_add(struct device *veth, struct veth_config *cfg)
1460 {
1461 struct nl_msg *msg;
1462 struct ifinfomsg empty_iim = {};
1463 struct nlattr *linkinfo, *data, *veth_info;
1464 int rv;
1465
1466 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1467
1468 if (!msg)
1469 return -1;
1470
1471 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1472
1473 if (cfg->flags & VETH_OPT_MACADDR)
1474 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1475 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1476
1477 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1478 goto nla_put_failure;
1479
1480 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1481
1482 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1483 goto nla_put_failure;
1484
1485 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1486 goto nla_put_failure;
1487
1488 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1489
1490 if (cfg->flags & VETH_OPT_PEER_NAME)
1491 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1492 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1493 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1494
1495 nla_nest_end(msg, veth_info);
1496 nla_nest_end(msg, data);
1497 nla_nest_end(msg, linkinfo);
1498
1499 rv = system_rtnl_call(msg);
1500 if (rv) {
1501 if (cfg->flags & VETH_OPT_PEER_NAME)
1502 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1503 else
1504 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1505 }
1506
1507 return rv;
1508
1509 nla_put_failure:
1510 nlmsg_free(msg);
1511 return -ENOMEM;
1512 }
1513
1514 int system_veth_del(struct device *veth)
1515 {
1516 return system_link_del(veth->ifname);
1517 }
1518
1519 static int system_vlan(struct device *dev, int id)
1520 {
1521 struct vlan_ioctl_args ifr = {
1522 .cmd = SET_VLAN_NAME_TYPE_CMD,
1523 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1524 };
1525
1526 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1527 return -1;
1528
1529 if (id < 0) {
1530 ifr.cmd = DEL_VLAN_CMD;
1531 ifr.u.VID = 0;
1532 } else {
1533 ifr.cmd = ADD_VLAN_CMD;
1534 ifr.u.VID = id;
1535 }
1536 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1537 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1538 }
1539
1540 int system_vlan_add(struct device *dev, int id)
1541 {
1542 return system_vlan(dev, id);
1543 }
1544
1545 int system_vlan_del(struct device *dev)
1546 {
1547 return system_vlan(dev, -1);
1548 }
1549
1550 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1551 {
1552 struct nl_msg *msg;
1553 struct nlattr *linkinfo, *data, *qos;
1554 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1555 struct vlan_qos_mapping *elem;
1556 struct ifla_vlan_qos_mapping nl_qos_map;
1557 int rv;
1558
1559 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1560
1561 if (!msg)
1562 return -1;
1563
1564 nlmsg_append(msg, &iim, sizeof(iim), 0);
1565 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1566 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1567
1568 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1569 goto nla_put_failure;
1570
1571 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1572
1573 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1574 goto nla_put_failure;
1575
1576 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1577
1578 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1579 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1580 #else
1581 if(cfg->proto == VLAN_PROTO_8021AD)
1582 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);
1583 #endif
1584
1585 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1586 goto nla_put_failure;
1587
1588 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1589 nl_qos_map.from = elem->from;
1590 nl_qos_map.to = elem->to;
1591 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1592 }
1593 nla_nest_end(msg, qos);
1594
1595 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1596 goto nla_put_failure;
1597
1598 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1599 nl_qos_map.from = elem->from;
1600 nl_qos_map.to = elem->to;
1601 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1602 }
1603 nla_nest_end(msg, qos);
1604
1605 nla_nest_end(msg, data);
1606 nla_nest_end(msg, linkinfo);
1607
1608 rv = system_rtnl_call(msg);
1609 if (rv)
1610 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1611
1612 return rv;
1613
1614 nla_put_failure:
1615 nlmsg_free(msg);
1616 return -ENOMEM;
1617 }
1618
1619 int system_vlandev_del(struct device *vlandev)
1620 {
1621 return system_link_del(vlandev->ifname);
1622 }
1623
1624 static void
1625 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1626 {
1627 struct ethtool_cmd ecmd = {
1628 .cmd = ETHTOOL_GSET,
1629 };
1630 struct ifreq ifr = {
1631 .ifr_data = (caddr_t)&ecmd,
1632 };
1633 static const struct {
1634 int speed;
1635 uint8_t bit_half;
1636 uint8_t bit_full;
1637 } speed_mask[] = {
1638 { 10, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT },
1639 { 100, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT },
1640 { 1000, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT },
1641 };
1642 uint32_t adv;
1643 int i;
1644
1645 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1646
1647 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
1648 return;
1649
1650 adv = ecmd.supported;
1651 for (i = 0; i < ARRAY_SIZE(speed_mask); i++) {
1652 if (s->flags & DEV_OPT_DUPLEX) {
1653 int bit = s->duplex ? speed_mask[i].bit_half : speed_mask[i].bit_full;
1654 adv &= ~(1 << bit);
1655 }
1656
1657 if (!(s->flags & DEV_OPT_SPEED) ||
1658 s->speed == speed_mask[i].speed)
1659 continue;
1660
1661 adv &= ~(1 << speed_mask[i].bit_full);
1662 adv &= ~(1 << speed_mask[i].bit_half);
1663 }
1664
1665
1666 if (ecmd.autoneg && ecmd.advertising == adv)
1667 return;
1668
1669 ecmd.autoneg = 1;
1670 ecmd.advertising = adv;
1671 ecmd.cmd = ETHTOOL_SSET;
1672 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1673 }
1674
1675 void
1676 system_if_get_settings(struct device *dev, struct device_settings *s)
1677 {
1678 struct ifreq ifr;
1679 char buf[10];
1680
1681 memset(&ifr, 0, sizeof(ifr));
1682 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1683
1684 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1685 s->mtu = ifr.ifr_mtu;
1686 s->flags |= DEV_OPT_MTU;
1687 }
1688
1689 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1690 if (s->mtu6 > 0)
1691 s->flags |= DEV_OPT_MTU6;
1692
1693 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1694 s->txqueuelen = ifr.ifr_qlen;
1695 s->flags |= DEV_OPT_TXQUEUELEN;
1696 }
1697
1698 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1699 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1700 s->flags |= DEV_OPT_MACADDR;
1701 }
1702
1703 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1704 s->ipv6 = !strtoul(buf, NULL, 0);
1705 s->flags |= DEV_OPT_IPV6;
1706 }
1707
1708 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1709 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1710 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1711 }
1712
1713 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1714 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1715 s->flags |= DEV_OPT_PROMISC;
1716
1717 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1718 s->flags |= DEV_OPT_MULTICAST;
1719 }
1720
1721 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1722 s->rpfilter = strtoul(buf, NULL, 0);
1723 s->flags |= DEV_OPT_RPFILTER;
1724 }
1725
1726 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1727 s->acceptlocal = strtoul(buf, NULL, 0);
1728 s->flags |= DEV_OPT_ACCEPTLOCAL;
1729 }
1730
1731 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1732 s->igmpversion = strtoul(buf, NULL, 0);
1733 s->flags |= DEV_OPT_IGMPVERSION;
1734 }
1735
1736 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1737 s->mldversion = strtoul(buf, NULL, 0);
1738 s->flags |= DEV_OPT_MLDVERSION;
1739 }
1740
1741 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1742 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1743 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1744 }
1745
1746 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1747 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1748 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1749 }
1750
1751 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1752 s->neigh4locktime = strtol(buf, NULL, 0);
1753 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1754 }
1755
1756 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1757 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1758 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1759 }
1760
1761 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1762 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1763 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1764 }
1765
1766 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1767 s->dadtransmits = strtoul(buf, NULL, 0);
1768 s->flags |= DEV_OPT_DADTRANSMITS;
1769 }
1770
1771 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1772 s->sendredirects = strtoul(buf, NULL, 0);
1773 s->flags |= DEV_OPT_SENDREDIRECTS;
1774 }
1775
1776 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1777 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1778 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1779 }
1780
1781 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1782 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1783 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1784 }
1785
1786 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1787 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1788 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1789 }
1790
1791 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1792 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1793 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1794 }
1795
1796 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1797 s->arp_accept = strtoul(buf, NULL, 0);
1798 s->flags |= DEV_OPT_ARP_ACCEPT;
1799 }
1800 }
1801
1802 void
1803 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1804 {
1805 struct ifreq ifr;
1806 char buf[12];
1807
1808 apply_mask &= s->flags;
1809
1810 memset(&ifr, 0, sizeof(ifr));
1811 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1812 if (apply_mask & DEV_OPT_MTU) {
1813 ifr.ifr_mtu = s->mtu;
1814 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1815 s->flags &= ~DEV_OPT_MTU;
1816 }
1817 if (apply_mask & DEV_OPT_MTU6) {
1818 system_update_ipv6_mtu(dev, s->mtu6);
1819 }
1820 if (apply_mask & DEV_OPT_TXQUEUELEN) {
1821 ifr.ifr_qlen = s->txqueuelen;
1822 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1823 s->flags &= ~DEV_OPT_TXQUEUELEN;
1824 }
1825 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
1826 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1827 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1828 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1829 s->flags &= ~DEV_OPT_MACADDR;
1830 }
1831 if (apply_mask & DEV_OPT_IPV6)
1832 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1833 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
1834 struct device dummy = {
1835 .ifname = "all",
1836 };
1837 bool ip6segmentrouting = device_check_ip6segmentrouting();
1838
1839 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
1840 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
1841 }
1842 if (apply_mask & DEV_OPT_PROMISC) {
1843 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1844 !s->promisc ? IFF_PROMISC : 0) < 0)
1845 s->flags &= ~DEV_OPT_PROMISC;
1846 }
1847 if (apply_mask & DEV_OPT_RPFILTER) {
1848 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1849 system_set_rpfilter(dev, buf);
1850 }
1851 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
1852 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1853 if (apply_mask & DEV_OPT_IGMPVERSION) {
1854 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1855 system_set_igmpversion(dev, buf);
1856 }
1857 if (apply_mask & DEV_OPT_MLDVERSION) {
1858 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1859 system_set_mldversion(dev, buf);
1860 }
1861 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
1862 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1863 system_set_neigh4reachabletime(dev, buf);
1864 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1865 system_set_neigh6reachabletime(dev, buf);
1866 }
1867 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
1868 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1869 system_set_neigh4locktime(dev, buf);
1870 }
1871 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
1872 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1873 system_set_neigh4gcstaletime(dev, buf);
1874 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1875 system_set_neigh6gcstaletime(dev, buf);
1876 }
1877 if (apply_mask & DEV_OPT_DADTRANSMITS) {
1878 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1879 system_set_dadtransmits(dev, buf);
1880 }
1881 if (apply_mask & DEV_OPT_MULTICAST) {
1882 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1883 !s->multicast ? IFF_MULTICAST : 0) < 0)
1884 s->flags &= ~DEV_OPT_MULTICAST;
1885 }
1886 if (apply_mask & DEV_OPT_SENDREDIRECTS)
1887 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1888 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1889 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
1890 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1891 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
1892 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
1893 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
1894 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
1895 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
1896 if (apply_mask & DEV_OPT_ARP_ACCEPT)
1897 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
1898 system_set_ethtool_settings(dev, s);
1899 }
1900
1901 int system_if_up(struct device *dev)
1902 {
1903 return system_if_flags(dev->ifname, IFF_UP, 0);
1904 }
1905
1906 int system_if_down(struct device *dev)
1907 {
1908 return system_if_flags(dev->ifname, 0, IFF_UP);
1909 }
1910
1911 struct if_check_data {
1912 struct device *dev;
1913 int pending;
1914 int ret;
1915 };
1916
1917 #ifndef IFF_LOWER_UP
1918 #define IFF_LOWER_UP 0x10000
1919 #endif
1920
1921 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1922 {
1923 struct nlmsghdr *nh = nlmsg_hdr(msg);
1924 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1925 struct if_check_data *chk = (struct if_check_data *)arg;
1926
1927 if (nh->nlmsg_type != RTM_NEWLINK)
1928 return NL_SKIP;
1929
1930 if (chk->dev->type == &simple_device_type)
1931 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1932 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1933
1934 return NL_OK;
1935 }
1936
1937 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1938 {
1939 struct if_check_data *chk = (struct if_check_data *)arg;
1940 chk->pending = 0;
1941 return NL_STOP;
1942 }
1943
1944 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1945 {
1946 struct if_check_data *chk = (struct if_check_data *)arg;
1947
1948 if (chk->dev->type == &simple_device_type)
1949 device_set_present(chk->dev, false);
1950 device_set_link(chk->dev, false);
1951 chk->pending = err->error;
1952
1953 return NL_STOP;
1954 }
1955
1956 struct bridge_vlan_check_data {
1957 struct device *check_dev;
1958 int ifindex;
1959 int ret;
1960 bool pending;
1961 };
1962
1963 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
1964 struct bridge_vlan_port *port,
1965 struct bridge_vlan_info *vinfo)
1966 {
1967 uint16_t flags = 0, diff, mask;
1968
1969 if (port->flags & BRVLAN_F_PVID)
1970 flags |= BRIDGE_VLAN_INFO_PVID;
1971 if (port->flags & BRVLAN_F_UNTAGGED)
1972 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1973
1974 diff = vinfo->flags ^ flags;
1975 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
1976 if (diff & mask) {
1977 data->ret = 1;
1978 data->pending = false;
1979 }
1980
1981 port->check = 1;
1982 }
1983
1984 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
1985 struct rtattr *attr)
1986 {
1987 struct bridge_vlan_hotplug_port *port;
1988 struct bridge_vlan_info *vinfo;
1989 struct bridge_vlan *vlan;
1990 struct rtattr *cur;
1991 int rem = RTA_PAYLOAD(attr);
1992 int i;
1993
1994 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
1995 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
1996 continue;
1997
1998 vinfo = RTA_DATA(cur);
1999 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2000 if (!vlan) {
2001 data->ret = 1;
2002 data->pending = false;
2003 return;
2004 }
2005
2006 for (i = 0; i < vlan->n_ports; i++)
2007 if (!vlan->ports[i].check)
2008 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2009
2010 list_for_each_entry(port, &vlan->hotplug_ports, list)
2011 if (!port->port.check)
2012 bridge_vlan_check_port(data, &port->port, vinfo);
2013 }
2014 }
2015
2016 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2017 {
2018 struct bridge_vlan_check_data *data = arg;
2019 struct nlmsghdr *nh = nlmsg_hdr(msg);
2020 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2021 struct rtattr *attr;
2022 int rem;
2023
2024 if (nh->nlmsg_type != RTM_NEWLINK)
2025 return NL_SKIP;
2026
2027 if (ifi->ifi_family != AF_BRIDGE)
2028 return NL_SKIP;
2029
2030 if (ifi->ifi_index != data->ifindex)
2031 return NL_SKIP;
2032
2033 attr = IFLA_RTA(ifi);
2034 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2035 while (RTA_OK(attr, rem)) {
2036 if (attr->rta_type == IFLA_AF_SPEC)
2037 bridge_vlan_check_attr(data, attr);
2038
2039 attr = RTA_NEXT(attr, rem);
2040 }
2041
2042 return NL_SKIP;
2043 }
2044
2045 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2046 {
2047 struct bridge_vlan_check_data *data = arg;
2048 data->pending = false;
2049 return NL_STOP;
2050 }
2051
2052 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2053 {
2054 struct bridge_vlan_check_data *data = arg;
2055 data->pending = false;
2056 return NL_STOP;
2057 }
2058
2059 int system_bridge_vlan_check(struct device *dev, char *ifname)
2060 {
2061 struct bridge_vlan_check_data data = {
2062 .check_dev = dev,
2063 .ifindex = if_nametoindex(ifname),
2064 .ret = -1,
2065 .pending = true,
2066 };
2067 static struct ifinfomsg ifi = {
2068 .ifi_family = AF_BRIDGE
2069 };
2070 static struct rtattr ext_req = {
2071 .rta_type = IFLA_EXT_MASK,
2072 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2073 };
2074 uint32_t filter = RTEXT_FILTER_BRVLAN;
2075 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2076 struct bridge_vlan *vlan;
2077 struct nl_msg *msg;
2078 int i;
2079
2080 if (!data.ifindex)
2081 return 0;
2082
2083 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2084
2085 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2086 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2087 nlmsg_append(msg, &filter, sizeof(filter), 0))
2088 goto free;
2089
2090 vlist_for_each_element(&dev->vlans, vlan, node) {
2091 struct bridge_vlan_hotplug_port *port;
2092
2093 for (i = 0; i < vlan->n_ports; i++) {
2094 if (!strcmp(vlan->ports[i].ifname, ifname))
2095 vlan->ports[i].check = 0;
2096 else
2097 vlan->ports[i].check = -1;
2098 }
2099
2100 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2101 if (!strcmp(port->port.ifname, ifname))
2102 port->port.check = 0;
2103 else
2104 port->port.check = -1;
2105 }
2106 }
2107
2108 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2109 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2110 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2111 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2112
2113 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2114 goto free;
2115
2116 data.ret = 0;
2117 while (data.pending)
2118 nl_recvmsgs(sock_rtnl, cb);
2119
2120 vlist_for_each_element(&dev->vlans, vlan, node) {
2121 struct bridge_vlan_hotplug_port *port;
2122
2123 for (i = 0; i < vlan->n_ports; i++) {
2124 if (!vlan->ports[i].check) {
2125 data.ret = 1;
2126 break;
2127 }
2128 }
2129
2130 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2131 if (!port->port.check) {
2132 data.ret = 1;
2133 break;
2134 }
2135 }
2136 }
2137
2138 goto out;
2139
2140 free:
2141 nlmsg_free(msg);
2142 out:
2143 nl_cb_put(cb);
2144 return data.ret;
2145 }
2146
2147 int system_if_check(struct device *dev)
2148 {
2149 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2150 struct nl_msg *msg;
2151 struct ifinfomsg ifi = {
2152 .ifi_family = AF_UNSPEC,
2153 .ifi_index = 0,
2154 };
2155 struct if_check_data chk = {
2156 .dev = dev,
2157 .pending = 1,
2158 };
2159 int ret = 1;
2160
2161 if (!cb)
2162 return ret;
2163
2164 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2165 if (!msg)
2166 goto out;
2167
2168 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2169 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2170 goto free;
2171
2172 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2173 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2174 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2175
2176 ret = nl_send_auto_complete(sock_rtnl, msg);
2177 if (ret < 0)
2178 goto free;
2179
2180 while (chk.pending > 0)
2181 nl_recvmsgs(sock_rtnl, cb);
2182
2183 ret = chk.pending;
2184
2185 free:
2186 nlmsg_free(msg);
2187 out:
2188 nl_cb_put(cb);
2189 return ret;
2190 }
2191
2192 struct device *
2193 system_if_get_parent(struct device *dev)
2194 {
2195 char buf[64], *devname;
2196 int ifindex, iflink;
2197
2198 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2199 return NULL;
2200
2201 iflink = strtoul(buf, NULL, 0);
2202 ifindex = system_if_resolve(dev);
2203 if (!iflink || iflink == ifindex)
2204 return NULL;
2205
2206 devname = if_indextoname(iflink, buf);
2207 if (!devname)
2208 return NULL;
2209
2210 return device_get(devname, true);
2211 }
2212
2213 static bool
2214 read_string_file(int dir_fd, const char *file, char *buf, int len)
2215 {
2216 bool ret = false;
2217 char *c;
2218 int fd;
2219
2220 fd = openat(dir_fd, file, O_RDONLY);
2221 if (fd < 0)
2222 return false;
2223
2224 retry:
2225 len = read(fd, buf, len - 1);
2226 if (len < 0) {
2227 if (errno == EINTR)
2228 goto retry;
2229 } else if (len > 0) {
2230 buf[len] = 0;
2231
2232 c = strchr(buf, '\n');
2233 if (c)
2234 *c = 0;
2235
2236 ret = true;
2237 }
2238
2239 close(fd);
2240
2241 return ret;
2242 }
2243
2244 static bool
2245 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2246 {
2247 char buf[64];
2248 bool ret = false;
2249
2250 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2251 if (ret)
2252 *val = strtoull(buf, NULL, 0);
2253
2254 return ret;
2255 }
2256
2257 /* Assume advertised flags == supported flags */
2258 static const struct {
2259 uint32_t mask;
2260 const char *name;
2261 } ethtool_link_modes[] = {
2262 { ADVERTISED_10baseT_Half, "10baseT-H" },
2263 { ADVERTISED_10baseT_Full, "10baseT-F" },
2264 { ADVERTISED_100baseT_Half, "100baseT-H" },
2265 { ADVERTISED_100baseT_Full, "100baseT-F" },
2266 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
2267 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
2268 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
2269 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
2270 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
2271 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
2272 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
2273 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
2274 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
2275 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
2276 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
2277 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
2278 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
2279 #ifdef ADVERTISED_56000baseKR4_Full
2280 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
2281 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
2282 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
2283 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
2284 #endif
2285 };
2286
2287 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
2288 {
2289 int i;
2290 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
2291 if (mask & ethtool_link_modes[i].mask)
2292 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
2293 }
2294 }
2295
2296 bool
2297 system_if_force_external(const char *ifname)
2298 {
2299 struct stat s;
2300
2301 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2302 }
2303
2304 static const char *
2305 system_netdevtype_name(unsigned short dev_type)
2306 {
2307 unsigned int i;
2308
2309 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2310 if (netdev_types[i].id == dev_type)
2311 return netdev_types[i].name;
2312 }
2313
2314 /* the last key is used by default */
2315 i = ARRAY_SIZE(netdev_types) - 1;
2316
2317 return netdev_types[i].name;
2318 }
2319
2320 static void
2321 system_add_devtype(struct blob_buf *b, const char *ifname)
2322 {
2323 char buf[100];
2324 bool found = false;
2325
2326 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2327 const char *info = "DEVTYPE=";
2328 char *context = NULL;
2329 const char *line = strtok_r(buf, "\r\n", &context);
2330
2331 while (line != NULL) {
2332 char *index = strstr(line, info);
2333
2334 if (index != NULL) {
2335 blobmsg_add_string(b, "devtype", index + strlen(info));
2336 found = true;
2337 break;
2338 }
2339
2340 line = strtok_r(NULL, "\r\n", &context);
2341 }
2342 }
2343
2344 if (!found) {
2345 unsigned short number = 0;
2346 const char *name = NULL;
2347
2348 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2349 number = strtoul(buf, NULL, 0);
2350 name = system_netdevtype_name(number);
2351 blobmsg_add_string(b, "devtype", name);
2352 }
2353 }
2354 }
2355
2356 int
2357 system_if_dump_info(struct device *dev, struct blob_buf *b)
2358 {
2359 struct ethtool_cmd ecmd;
2360 struct ifreq ifr;
2361 char *s;
2362 void *c;
2363
2364 memset(&ecmd, 0, sizeof(ecmd));
2365 memset(&ifr, 0, sizeof(ifr));
2366 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2367 ifr.ifr_data = (caddr_t) &ecmd;
2368 ecmd.cmd = ETHTOOL_GSET;
2369
2370 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2371 c = blobmsg_open_array(b, "link-advertising");
2372 system_add_link_modes(b, ecmd.advertising);
2373 blobmsg_close_array(b, c);
2374
2375 c = blobmsg_open_array(b, "link-partner-advertising");
2376 system_add_link_modes(b, ecmd.lp_advertising);
2377 blobmsg_close_array(b, c);
2378
2379 c = blobmsg_open_array(b, "link-supported");
2380 system_add_link_modes(b, ecmd.supported);
2381 blobmsg_close_array(b, c);
2382
2383 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2384 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2385 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2386 blobmsg_add_string_buffer(b);
2387
2388 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2389 }
2390
2391 system_add_devtype(b, dev->ifname);
2392
2393 return 0;
2394 }
2395
2396 int
2397 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2398 {
2399 const char *const counters[] = {
2400 "collisions", "rx_frame_errors", "tx_compressed",
2401 "multicast", "rx_length_errors", "tx_dropped",
2402 "rx_bytes", "rx_missed_errors", "tx_errors",
2403 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2404 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2405 "rx_dropped", "tx_aborted_errors", "tx_packets",
2406 "rx_errors", "tx_bytes", "tx_window_errors",
2407 "rx_fifo_errors", "tx_carrier_errors",
2408 };
2409 int stats_dir;
2410 int i;
2411 uint64_t val = 0;
2412
2413 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2414 if (stats_dir < 0)
2415 return -1;
2416
2417 for (i = 0; i < ARRAY_SIZE(counters); i++)
2418 if (read_uint64_file(stats_dir, counters[i], &val))
2419 blobmsg_add_u64(b, counters[i], val);
2420
2421 close(stats_dir);
2422 return 0;
2423 }
2424
2425 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2426 {
2427 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2428 int alen = v4 ? 4 : 16;
2429 unsigned int flags = 0;
2430 struct ifaddrmsg ifa = {
2431 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2432 .ifa_prefixlen = addr->mask,
2433 .ifa_index = dev->ifindex,
2434 };
2435
2436 struct nl_msg *msg;
2437 if (cmd == RTM_NEWADDR)
2438 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2439
2440 msg = nlmsg_alloc_simple(cmd, flags);
2441 if (!msg)
2442 return -1;
2443
2444 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2445 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2446 if (v4) {
2447 if (addr->broadcast)
2448 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2449 if (addr->point_to_point)
2450 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2451 } else {
2452 time_t now = system_get_rtime();
2453 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2454
2455 if (addr->preferred_until) {
2456 int64_t preferred = addr->preferred_until - now;
2457 if (preferred < 0)
2458 preferred = 0;
2459 else if (preferred > UINT32_MAX)
2460 preferred = UINT32_MAX;
2461
2462 cinfo.ifa_prefered = preferred;
2463 }
2464
2465 if (addr->valid_until) {
2466 int64_t valid = addr->valid_until - now;
2467 if (valid <= 0) {
2468 nlmsg_free(msg);
2469 return -1;
2470 }
2471 else if (valid > UINT32_MAX)
2472 valid = UINT32_MAX;
2473
2474 cinfo.ifa_valid = valid;
2475 }
2476
2477 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2478
2479 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2480 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2481 }
2482
2483 return system_rtnl_call(msg);
2484 }
2485
2486 int system_add_address(struct device *dev, struct device_addr *addr)
2487 {
2488 return system_addr(dev, addr, RTM_NEWADDR);
2489 }
2490
2491 int system_del_address(struct device *dev, struct device_addr *addr)
2492 {
2493 return system_addr(dev, addr, RTM_DELADDR);
2494 }
2495
2496 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2497 {
2498 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2499 unsigned int flags = 0;
2500 struct ndmsg ndm = {
2501 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2502 .ndm_ifindex = dev->ifindex,
2503 .ndm_state = NUD_PERMANENT,
2504 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2505 };
2506 struct nl_msg *msg;
2507
2508 if (cmd == RTM_NEWNEIGH)
2509 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2510
2511 msg = nlmsg_alloc_simple(cmd, flags);
2512
2513 if (!msg)
2514 return -1;
2515
2516 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2517
2518 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2519 if (neighbor->flags & DEVNEIGH_MAC)
2520 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2521
2522
2523 return system_rtnl_call(msg);
2524 }
2525
2526 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2527 {
2528 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2529 }
2530
2531 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2532 {
2533 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2534 }
2535
2536 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2537 {
2538 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2539 bool have_gw;
2540 unsigned int flags = 0;
2541
2542 if (alen == 4)
2543 have_gw = !!route->nexthop.in.s_addr;
2544 else
2545 have_gw = route->nexthop.in6.s6_addr32[0] ||
2546 route->nexthop.in6.s6_addr32[1] ||
2547 route->nexthop.in6.s6_addr32[2] ||
2548 route->nexthop.in6.s6_addr32[3];
2549
2550 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2551 ? route->table : RT_TABLE_MAIN;
2552
2553 struct rtmsg rtm = {
2554 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2555 .rtm_dst_len = route->mask,
2556 .rtm_src_len = route->sourcemask,
2557 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2558 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2559 .rtm_scope = RT_SCOPE_NOWHERE,
2560 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2561 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2562 };
2563 struct nl_msg *msg;
2564
2565 if (cmd == RTM_NEWROUTE) {
2566 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2567
2568 if (!dev) { /* Add null-route */
2569 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2570 rtm.rtm_type = RTN_UNREACHABLE;
2571 }
2572 else
2573 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2574 }
2575
2576 if (route->flags & DEVROUTE_TYPE) {
2577 rtm.rtm_type = route->type;
2578 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2579 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2580 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2581 rtm.rtm_table = RT_TABLE_LOCAL;
2582 }
2583
2584 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2585 rtm.rtm_scope = RT_SCOPE_HOST;
2586 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2587 rtm.rtm_type == RTN_ANYCAST) {
2588 rtm.rtm_scope = RT_SCOPE_LINK;
2589 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2590 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2591 rtm.rtm_type == RTN_THROW) {
2592 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2593 dev = NULL;
2594 }
2595 }
2596
2597 msg = nlmsg_alloc_simple(cmd, flags);
2598 if (!msg)
2599 return -1;
2600
2601 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2602
2603 if (route->mask)
2604 nla_put(msg, RTA_DST, alen, &route->addr);
2605
2606 if (route->sourcemask) {
2607 if (rtm.rtm_family == AF_INET)
2608 nla_put(msg, RTA_PREFSRC, alen, &route->source);
2609 else
2610 nla_put(msg, RTA_SRC, alen, &route->source);
2611 }
2612
2613 if (route->metric > 0)
2614 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2615
2616 if (have_gw)
2617 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2618
2619 if (dev)
2620 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2621
2622 if (table >= 256)
2623 nla_put_u32(msg, RTA_TABLE, table);
2624
2625 if (route->flags & DEVROUTE_MTU) {
2626 struct nlattr *metrics;
2627
2628 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2629 goto nla_put_failure;
2630
2631 nla_put_u32(msg, RTAX_MTU, route->mtu);
2632
2633 nla_nest_end(msg, metrics);
2634 }
2635
2636 return system_rtnl_call(msg);
2637
2638 nla_put_failure:
2639 nlmsg_free(msg);
2640 return -ENOMEM;
2641 }
2642
2643 int system_add_route(struct device *dev, struct device_route *route)
2644 {
2645 return system_rt(dev, route, RTM_NEWROUTE);
2646 }
2647
2648 int system_del_route(struct device *dev, struct device_route *route)
2649 {
2650 return system_rt(dev, route, RTM_DELROUTE);
2651 }
2652
2653 int system_flush_routes(void)
2654 {
2655 const char *names[] = { "ipv4", "ipv6" };
2656 int fd, i;
2657
2658 for (i = 0; i < ARRAY_SIZE(names); i++) {
2659 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
2660 fd = open(dev_buf, O_WRONLY);
2661 if (fd < 0)
2662 continue;
2663
2664 if (write(fd, "-1", 2)) {}
2665 close(fd);
2666 }
2667 return 0;
2668 }
2669
2670 bool system_resolve_rt_type(const char *type, unsigned int *id)
2671 {
2672 return system_rtn_aton(type, id);
2673 }
2674
2675 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2676 {
2677 FILE *f;
2678 char *e, buf[128];
2679 unsigned int n, proto = 256;
2680 n = strtoul(type, &e, 0);
2681 if (!*e && e != type)
2682 proto = n;
2683 else if (!strcmp(type, "unspec"))
2684 proto = RTPROT_UNSPEC;
2685 else if (!strcmp(type, "kernel"))
2686 proto = RTPROT_KERNEL;
2687 else if (!strcmp(type, "boot"))
2688 proto = RTPROT_BOOT;
2689 else if (!strcmp(type, "static"))
2690 proto = RTPROT_STATIC;
2691 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2692 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2693 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2694 continue;
2695
2696 n = strtoul(e, NULL, 10);
2697 e = strtok(NULL, " \t\n");
2698
2699 if (e && !strcmp(e, type)) {
2700 proto = n;
2701 break;
2702 }
2703 }
2704 fclose(f);
2705 }
2706
2707 if (proto > 255)
2708 return false;
2709
2710 *id = proto;
2711 return true;
2712 }
2713
2714 bool system_resolve_rt_table(const char *name, unsigned int *id)
2715 {
2716 FILE *f;
2717 char *e, buf[128];
2718 unsigned int n, table = RT_TABLE_UNSPEC;
2719
2720 /* first try to parse table as number */
2721 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2722 table = n;
2723
2724 /* handle well known aliases */
2725 else if (!strcmp(name, "default"))
2726 table = RT_TABLE_DEFAULT;
2727 else if (!strcmp(name, "main"))
2728 table = RT_TABLE_MAIN;
2729 else if (!strcmp(name, "local"))
2730 table = RT_TABLE_LOCAL;
2731
2732 /* try to look up name in /etc/iproute2/rt_tables */
2733 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2734 {
2735 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2736 {
2737 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2738 continue;
2739
2740 n = strtoul(e, NULL, 10);
2741 e = strtok(NULL, " \t\n");
2742
2743 if (e && !strcmp(e, name))
2744 {
2745 table = n;
2746 break;
2747 }
2748 }
2749
2750 fclose(f);
2751 }
2752
2753 if (table == RT_TABLE_UNSPEC)
2754 return false;
2755
2756 *id = table;
2757 return true;
2758 }
2759
2760 bool system_is_default_rt_table(unsigned int id)
2761 {
2762 return (id == RT_TABLE_MAIN);
2763 }
2764
2765 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2766 {
2767 char *e;
2768 unsigned int n;
2769
2770 if (!strcmp(filter, "strict"))
2771 n = 1;
2772 else if (!strcmp(filter, "loose"))
2773 n = 2;
2774 else {
2775 n = strtoul(filter, &e, 0);
2776 if (*e || e == filter || n > 2)
2777 return false;
2778 }
2779
2780 *id = n;
2781 return true;
2782 }
2783
2784 static int system_iprule(struct iprule *rule, int cmd)
2785 {
2786 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2787
2788 struct nl_msg *msg;
2789 struct rtmsg rtm = {
2790 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2791 .rtm_protocol = RTPROT_STATIC,
2792 .rtm_scope = RT_SCOPE_UNIVERSE,
2793 .rtm_table = RT_TABLE_UNSPEC,
2794 .rtm_type = RTN_UNSPEC,
2795 .rtm_flags = 0,
2796 };
2797
2798 if (cmd == RTM_NEWRULE)
2799 rtm.rtm_type = RTN_UNICAST;
2800
2801 if (rule->invert)
2802 rtm.rtm_flags |= FIB_RULE_INVERT;
2803
2804 if (rule->flags & IPRULE_SRC)
2805 rtm.rtm_src_len = rule->src_mask;
2806
2807 if (rule->flags & IPRULE_DEST)
2808 rtm.rtm_dst_len = rule->dest_mask;
2809
2810 if (rule->flags & IPRULE_TOS)
2811 rtm.rtm_tos = rule->tos;
2812
2813 if (rule->flags & IPRULE_LOOKUP) {
2814 if (rule->lookup < 256)
2815 rtm.rtm_table = rule->lookup;
2816 }
2817
2818 if (rule->flags & IPRULE_ACTION)
2819 rtm.rtm_type = rule->action;
2820 else if (rule->flags & IPRULE_GOTO)
2821 rtm.rtm_type = FR_ACT_GOTO;
2822 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2823 rtm.rtm_type = FR_ACT_NOP;
2824
2825 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2826
2827 if (!msg)
2828 return -1;
2829
2830 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2831
2832 if (rule->flags & IPRULE_IN)
2833 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2834
2835 if (rule->flags & IPRULE_OUT)
2836 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2837
2838 if (rule->flags & IPRULE_SRC)
2839 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2840
2841 if (rule->flags & IPRULE_DEST)
2842 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2843
2844 if (rule->flags & IPRULE_PRIORITY)
2845 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2846 else if (cmd == RTM_NEWRULE)
2847 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2848
2849 if (rule->flags & IPRULE_FWMARK)
2850 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2851
2852 if (rule->flags & IPRULE_FWMASK)
2853 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2854
2855 if (rule->flags & IPRULE_LOOKUP) {
2856 if (rule->lookup >= 256)
2857 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2858 }
2859
2860 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2861 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2862
2863 if (rule->flags & IPRULE_UIDRANGE) {
2864 struct fib_rule_uid_range uidrange = {
2865 .start = rule->uidrange_start,
2866 .end = rule->uidrange_end
2867 };
2868
2869 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
2870 }
2871
2872 if (rule->flags & IPRULE_GOTO)
2873 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2874
2875 return system_rtnl_call(msg);
2876 }
2877
2878 int system_add_iprule(struct iprule *rule)
2879 {
2880 return system_iprule(rule, RTM_NEWRULE);
2881 }
2882
2883 int system_del_iprule(struct iprule *rule)
2884 {
2885 return system_iprule(rule, RTM_DELRULE);
2886 }
2887
2888 int system_flush_iprules(void)
2889 {
2890 int rv = 0;
2891 struct iprule rule;
2892
2893 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2894 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2895
2896 memset(&rule, 0, sizeof(rule));
2897
2898
2899 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2900
2901 rule.priority = 0;
2902 rule.lookup = RT_TABLE_LOCAL;
2903 rv |= system_iprule(&rule, RTM_NEWRULE);
2904
2905 rule.priority = 32766;
2906 rule.lookup = RT_TABLE_MAIN;
2907 rv |= system_iprule(&rule, RTM_NEWRULE);
2908
2909 rule.priority = 32767;
2910 rule.lookup = RT_TABLE_DEFAULT;
2911 rv |= system_iprule(&rule, RTM_NEWRULE);
2912
2913
2914 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2915
2916 rule.priority = 0;
2917 rule.lookup = RT_TABLE_LOCAL;
2918 rv |= system_iprule(&rule, RTM_NEWRULE);
2919
2920 rule.priority = 32766;
2921 rule.lookup = RT_TABLE_MAIN;
2922 rv |= system_iprule(&rule, RTM_NEWRULE);
2923
2924 return rv;
2925 }
2926
2927 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2928 {
2929 return system_rtn_aton(action, id);
2930 }
2931
2932 time_t system_get_rtime(void)
2933 {
2934 struct timespec ts;
2935 struct timeval tv;
2936
2937 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2938 return ts.tv_sec;
2939
2940 if (gettimeofday(&tv, NULL) == 0)
2941 return tv.tv_sec;
2942
2943 return 0;
2944 }
2945
2946 #ifndef IP_DF
2947 #define IP_DF 0x4000
2948 #endif
2949
2950 static int tunnel_ioctl(const char *name, int cmd, void *p)
2951 {
2952 struct ifreq ifr;
2953
2954 memset(&ifr, 0, sizeof(ifr));
2955 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2956 ifr.ifr_ifru.ifru_data = p;
2957 return ioctl(sock_ioctl, cmd, &ifr);
2958 }
2959
2960 #ifdef IFLA_IPTUN_MAX
2961 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2962 struct blob_attr **tb)
2963 {
2964 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2965 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2966 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2967 struct blob_attr *cur;
2968 int ret = 0, ttl = 0;
2969
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 if (link)
2977 nla_put_u32(nlm, IFLA_LINK, link);
2978
2979 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2980 if (!linkinfo) {
2981 ret = -ENOMEM;
2982 goto failure;
2983 }
2984
2985 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2986 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2987 if (!infodata) {
2988 ret = -ENOMEM;
2989 goto failure;
2990 }
2991
2992 if (link)
2993 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2994
2995 if ((cur = tb[TUNNEL_ATTR_TTL]))
2996 ttl = blobmsg_get_u32(cur);
2997
2998 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2999 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3000
3001 struct in6_addr in6buf;
3002 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3003 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3004 ret = -EINVAL;
3005 goto failure;
3006 }
3007 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3008 }
3009
3010 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3011 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3012 ret = -EINVAL;
3013 goto failure;
3014 }
3015 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3016 }
3017
3018 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3019 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3020 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3021
3022 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3023 blobmsg_data(cur), blobmsg_len(cur));
3024
3025 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3026 char *str = blobmsg_get_string(cur);
3027
3028 if (strcmp(str, "ignore")) {
3029 char *e;
3030 unsigned encap_limit = strtoul(str, &e, 0);
3031
3032 if (e == str || *e || encap_limit > 255) {
3033 ret = -EINVAL;
3034 goto failure;
3035 }
3036
3037 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3038 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3039 }
3040 }
3041
3042 #ifdef IFLA_IPTUN_FMR_MAX
3043 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3044 struct blob_attr *rcur;
3045 unsigned rrem, fmrcnt = 0;
3046 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3047
3048 if (!fmrs) {
3049 ret = -ENOMEM;
3050 goto failure;
3051 }
3052
3053 blobmsg_for_each_attr(rcur, cur, rrem) {
3054 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3055 struct in6_addr ip6prefix;
3056 struct in_addr ip4prefix;
3057 unsigned ip4len, ip6len, ealen, offset;
3058
3059 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3060 blobmsg_data(rcur), blobmsg_len(rcur));
3061
3062 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3063 !parse_ip_and_netmask(AF_INET6,
3064 blobmsg_data(tb_cur), &ip6prefix,
3065 &ip6len)) {
3066 ret = -EINVAL;
3067 goto failure;
3068 }
3069
3070 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3071 !parse_ip_and_netmask(AF_INET,
3072 blobmsg_data(tb_cur), &ip4prefix,
3073 &ip4len)) {
3074 ret = -EINVAL;
3075 goto failure;
3076 }
3077
3078 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3079 ret = -EINVAL;
3080 goto failure;
3081 }
3082 ealen = blobmsg_get_u32(tb_cur);
3083
3084 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3085 ret = -EINVAL;
3086 goto failure;
3087 }
3088 offset = blobmsg_get_u32(tb_cur);
3089
3090 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3091 if (!rule) {
3092 ret = -ENOMEM;
3093 goto failure;
3094 }
3095
3096 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3097 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3098 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3099 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3100 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3101 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3102
3103 nla_nest_end(nlm, rule);
3104 }
3105
3106 nla_nest_end(nlm, fmrs);
3107 }
3108 #endif
3109 if (tun_flags)
3110 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3111 }
3112
3113 nla_nest_end(nlm, infodata);
3114 nla_nest_end(nlm, linkinfo);
3115
3116 return system_rtnl_call(nlm);
3117
3118 failure:
3119 nlmsg_free(nlm);
3120 return ret;
3121 }
3122 #endif
3123
3124 #ifdef IFLA_IPTUN_MAX
3125 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3126 static int system_add_gre_tunnel(const char *name, const char *kind,
3127 const unsigned int link, struct blob_attr **tb, bool v6)
3128 {
3129 struct nl_msg *nlm;
3130 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3131 struct blob_attr *cur;
3132 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3133 uint16_t iflags = 0, oflags = 0;
3134 uint8_t tos = 0;
3135 int ret = 0, ttl = 0;
3136 unsigned encap_limit = 0;
3137
3138 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3139 if (!nlm)
3140 return -1;
3141
3142 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3143 nla_put_string(nlm, IFLA_IFNAME, name);
3144
3145 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3146 if (!linkinfo) {
3147 ret = -ENOMEM;
3148 goto failure;
3149 }
3150
3151 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3152 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3153 if (!infodata) {
3154 ret = -ENOMEM;
3155 goto failure;
3156 }
3157
3158 if (link)
3159 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3160
3161 if ((cur = tb[TUNNEL_ATTR_TTL]))
3162 ttl = blobmsg_get_u32(cur);
3163
3164 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3165 char *str = blobmsg_get_string(cur);
3166 if (strcmp(str, "inherit")) {
3167 unsigned uval;
3168
3169 if (!system_tos_aton(str, &uval)) {
3170 ret = -EINVAL;
3171 goto failure;
3172 }
3173
3174 if (v6)
3175 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3176 else
3177 tos = uval;
3178 } else {
3179 if (v6)
3180 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3181 else
3182 tos = 1;
3183 }
3184 }
3185
3186 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3187 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3188
3189 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3190 blobmsg_data(cur), blobmsg_len(cur));
3191
3192 if ((cur = tb_data[GRE_DATA_IKEY])) {
3193 if ((ikey = blobmsg_get_u32(cur)))
3194 iflags |= GRE_KEY;
3195 }
3196
3197 if ((cur = tb_data[GRE_DATA_OKEY])) {
3198 if ((okey = blobmsg_get_u32(cur)))
3199 oflags |= GRE_KEY;
3200 }
3201
3202 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3203 if (blobmsg_get_bool(cur))
3204 iflags |= GRE_CSUM;
3205 }
3206
3207 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3208 if (blobmsg_get_bool(cur))
3209 oflags |= GRE_CSUM;
3210 }
3211
3212 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3213 if (blobmsg_get_bool(cur))
3214 iflags |= GRE_SEQ;
3215 }
3216
3217 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3218 if (blobmsg_get_bool(cur))
3219 oflags |= GRE_SEQ;
3220 }
3221
3222 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3223 char *str = blobmsg_get_string(cur);
3224
3225 if (strcmp(str, "ignore")) {
3226 char *e;
3227
3228 encap_limit = strtoul(str, &e, 0);
3229
3230 if (e == str || *e || encap_limit > 255) {
3231 ret = -EINVAL;
3232 goto failure;
3233 }
3234
3235 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3236 }
3237 }
3238 }
3239
3240 if (v6) {
3241 struct in6_addr in6buf;
3242 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3243 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3244 ret = -EINVAL;
3245 goto failure;
3246 }
3247 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3248 }
3249
3250 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3251 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3252 ret = -EINVAL;
3253 goto failure;
3254 }
3255 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3256 }
3257
3258 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3259 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3260
3261 if (flowinfo)
3262 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3263
3264 if (flags6)
3265 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3266
3267 if (!ttl)
3268 ttl = 64;
3269 } else {
3270 struct in_addr inbuf;
3271 bool set_df = true;
3272
3273 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3274 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3275 ret = -EINVAL;
3276 goto failure;
3277 }
3278 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3279 }
3280
3281 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3282 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3283 ret = -EINVAL;
3284 goto failure;
3285 }
3286 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3287
3288 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3289 if (!okey) {
3290 okey = inbuf.s_addr;
3291 oflags |= GRE_KEY;
3292 }
3293
3294 if (!ikey) {
3295 ikey = inbuf.s_addr;
3296 iflags |= GRE_KEY;
3297 }
3298 }
3299 }
3300
3301 if ((cur = tb[TUNNEL_ATTR_DF]))
3302 set_df = blobmsg_get_bool(cur);
3303
3304 if (!set_df) {
3305 /* ttl != 0 and nopmtudisc are incompatible */
3306 if (ttl) {
3307 ret = -EINVAL;
3308 goto failure;
3309 }
3310 } else if (!ttl)
3311 ttl = 64;
3312
3313 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3314
3315 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3316 }
3317
3318 if (ttl)
3319 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3320
3321 if (oflags)
3322 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3323
3324 if (iflags)
3325 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3326
3327 if (okey)
3328 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3329
3330 if (ikey)
3331 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3332
3333 nla_nest_end(nlm, infodata);
3334 nla_nest_end(nlm, linkinfo);
3335
3336 return system_rtnl_call(nlm);
3337
3338 failure:
3339 nlmsg_free(nlm);
3340 return ret;
3341 }
3342 #endif
3343
3344 #ifdef IFLA_VTI_MAX
3345 static int system_add_vti_tunnel(const char *name, const char *kind,
3346 const unsigned int link, struct blob_attr **tb, bool v6)
3347 {
3348 struct nl_msg *nlm;
3349 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3350 struct blob_attr *cur;
3351 int ret = 0;
3352
3353 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3354 if (!nlm)
3355 return -1;
3356
3357 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3358 nla_put_string(nlm, IFLA_IFNAME, name);
3359
3360 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3361 if (!linkinfo) {
3362 ret = -ENOMEM;
3363 goto failure;
3364 }
3365
3366 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3367 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3368 if (!infodata) {
3369 ret = -ENOMEM;
3370 goto failure;
3371 }
3372
3373 if (link)
3374 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3375
3376 if (v6) {
3377 struct in6_addr in6buf;
3378 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3379 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3380 ret = -EINVAL;
3381 goto failure;
3382 }
3383 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3384 }
3385
3386 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3387 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3388 ret = -EINVAL;
3389 goto failure;
3390 }
3391 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3392 }
3393
3394 } else {
3395 struct in_addr inbuf;
3396
3397 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3398 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3399 ret = -EINVAL;
3400 goto failure;
3401 }
3402 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3403 }
3404
3405 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3406 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3407 ret = -EINVAL;
3408 goto failure;
3409 }
3410 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3411 }
3412
3413 }
3414
3415 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3416 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3417 uint32_t ikey = 0, okey = 0;
3418
3419 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3420 blobmsg_data(cur), blobmsg_len(cur));
3421
3422 if ((cur = tb_data[VTI_DATA_IKEY])) {
3423 if ((ikey = blobmsg_get_u32(cur)))
3424 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3425 }
3426
3427 if ((cur = tb_data[VTI_DATA_OKEY])) {
3428 if ((okey = blobmsg_get_u32(cur)))
3429 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3430 }
3431 }
3432
3433 nla_nest_end(nlm, infodata);
3434 nla_nest_end(nlm, linkinfo);
3435
3436 return system_rtnl_call(nlm);
3437
3438 failure:
3439 nlmsg_free(nlm);
3440 return ret;
3441 }
3442 #endif
3443
3444 #ifdef IFLA_XFRM_MAX
3445 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3446 const unsigned int link, struct blob_attr **tb)
3447 {
3448 struct nl_msg *nlm;
3449 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3450 struct blob_attr *cur;
3451 int ret = 0;
3452
3453 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3454 if (!nlm)
3455 return -1;
3456
3457 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3458 nla_put_string(nlm, IFLA_IFNAME, name);
3459
3460 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3461 if (!linkinfo) {
3462 ret = -ENOMEM;
3463 goto failure;
3464 }
3465
3466 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3467 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3468 if (!infodata) {
3469 ret = -ENOMEM;
3470 goto failure;
3471 }
3472
3473 if (link)
3474 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3475
3476 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3477 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3478 uint32_t if_id = 0;
3479
3480 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3481 blobmsg_data(cur), blobmsg_len(cur));
3482
3483 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3484 if ((if_id = blobmsg_get_u32(cur)))
3485 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3486 }
3487
3488 }
3489
3490 nla_nest_end(nlm, infodata);
3491 nla_nest_end(nlm, linkinfo);
3492
3493 return system_rtnl_call(nlm);
3494
3495 failure:
3496 nlmsg_free(nlm);
3497 return ret;
3498 }
3499 #endif
3500
3501 #ifdef IFLA_VXLAN_MAX
3502 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3503 struct blob_attr *cur;
3504 if ((cur = tb_data[vxlandatatype])) {
3505 bool val = blobmsg_get_bool(cur);
3506 if (invert)
3507 val = !val;
3508
3509 if ((attrtype == IFLA_VXLAN_GBP) && val)
3510 nla_put_flag(msg, attrtype);
3511 else
3512 nla_put_u8(msg, attrtype, val);
3513
3514 }
3515 }
3516
3517 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3518 {
3519 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3520 struct nl_msg *msg;
3521 struct nlattr *linkinfo, *data;
3522 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3523 struct blob_attr *cur;
3524 int ret = 0;
3525
3526 if ((cur = tb[TUNNEL_ATTR_DATA]))
3527 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3528 blobmsg_data(cur), blobmsg_len(cur));
3529 else
3530 return -EINVAL;
3531
3532 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3533
3534 if (!msg)
3535 return -1;
3536
3537 nlmsg_append(msg, &iim, sizeof(iim), 0);
3538
3539 nla_put_string(msg, IFLA_IFNAME, name);
3540
3541 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3542 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3543 if (!ea) {
3544 ret = -EINVAL;
3545 goto failure;
3546 }
3547
3548 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3549 }
3550
3551 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3552 uint32_t mtu = blobmsg_get_u32(cur);
3553 nla_put_u32(msg, IFLA_MTU, mtu);
3554 }
3555
3556 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3557 ret = -ENOMEM;
3558 goto failure;
3559 }
3560
3561 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3562
3563 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3564 ret = -ENOMEM;
3565 goto failure;
3566 }
3567
3568 if (link)
3569 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3570
3571 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3572 uint32_t id = blobmsg_get_u32(cur);
3573 if (id >= (1u << 24) - 1) {
3574 ret = -EINVAL;
3575 goto failure;
3576 }
3577
3578 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3579 }
3580
3581 if (v6) {
3582 struct in6_addr in6buf;
3583 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3584 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3585 ret = -EINVAL;
3586 goto failure;
3587 }
3588 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3589 }
3590
3591 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3592 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3593 ret = -EINVAL;
3594 goto failure;
3595 }
3596 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3597 }
3598 } else {
3599 struct in_addr inbuf;
3600
3601 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3602 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3603 ret = -EINVAL;
3604 goto failure;
3605 }
3606 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3607 }
3608
3609 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3610 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3611 ret = -EINVAL;
3612 goto failure;
3613 }
3614 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3615 }
3616 }
3617
3618 uint32_t port = 4789;
3619 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3620 port = blobmsg_get_u32(cur);
3621 if (port < 1 || port > 65535) {
3622 ret = -EINVAL;
3623 goto failure;
3624 }
3625 }
3626 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3627
3628 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3629 struct ifla_vxlan_port_range srcports = {0,0};
3630
3631 uint32_t low = blobmsg_get_u32(cur);
3632 if (low < 1 || low > 65535 - 1) {
3633 ret = -EINVAL;
3634 goto failure;
3635 }
3636
3637 srcports.low = htons((uint16_t) low);
3638 srcports.high = htons((uint16_t) (low+1));
3639
3640 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3641 uint32_t high = blobmsg_get_u32(cur);
3642 if (high < 1 || high > 65535) {
3643 ret = -EINVAL;
3644 goto failure;
3645 }
3646
3647 if (high > low)
3648 srcports.high = htons((uint16_t) high);
3649 }
3650
3651 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3652 }
3653
3654 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3655 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3656 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3657 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3658 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3659 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3660 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3661 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3662 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3663
3664 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3665 uint32_t ageing = blobmsg_get_u32(cur);
3666 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3667 }
3668
3669 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3670 uint32_t maxaddress = blobmsg_get_u32(cur);
3671 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3672 }
3673
3674 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3675 char *str = blobmsg_get_string(cur);
3676 unsigned tos = 1;
3677
3678 if (strcmp(str, "inherit")) {
3679 if (!system_tos_aton(str, &tos)) {
3680 ret = -EINVAL;
3681 goto failure;
3682 }
3683 }
3684
3685 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3686 }
3687
3688 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3689 uint32_t ttl = blobmsg_get_u32(cur);
3690 if (ttl < 1 || ttl > 255) {
3691 ret = -EINVAL;
3692 goto failure;
3693 }
3694
3695 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3696 }
3697
3698 nla_nest_end(msg, data);
3699 nla_nest_end(msg, linkinfo);
3700
3701 ret = system_rtnl_call(msg);
3702 if (ret)
3703 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3704
3705 return ret;
3706
3707 failure:
3708 nlmsg_free(msg);
3709 return ret;
3710 }
3711 #endif
3712
3713 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3714 {
3715 struct blob_attr *cur;
3716 int ret = 0;
3717
3718 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3719 return -1;
3720
3721 #ifdef SIOCADD6RD
3722 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3723 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3724 unsigned int mask;
3725 struct ip_tunnel_6rd p6;
3726
3727 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3728 blobmsg_data(cur), blobmsg_len(cur));
3729
3730 memset(&p6, 0, sizeof(p6));
3731
3732 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3733 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3734 &p6.prefix, &mask) || mask > 128) {
3735 ret = -EINVAL;
3736 goto failure;
3737 }
3738
3739 p6.prefixlen = mask;
3740 }
3741
3742 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3743 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3744 &p6.relay_prefix, &mask) || mask > 32) {
3745 ret = -EINVAL;
3746 goto failure;
3747 }
3748
3749 p6.relay_prefixlen = mask;
3750 }
3751
3752 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3753 ret = -1;
3754 goto failure;
3755 }
3756 }
3757 #endif
3758
3759 return ret;
3760
3761 failure:
3762 system_link_del(name);
3763 return ret;
3764 }
3765
3766 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3767 {
3768 struct blob_attr *cur;
3769 bool set_df = true;
3770 struct ip_tunnel_parm p = {
3771 .link = link,
3772 .iph = {
3773 .version = 4,
3774 .ihl = 5,
3775 .protocol = proto,
3776 }
3777 };
3778
3779 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3780 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3781 return -EINVAL;
3782
3783 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3784 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3785 return -EINVAL;
3786
3787 if ((cur = tb[TUNNEL_ATTR_DF]))
3788 set_df = blobmsg_get_bool(cur);
3789
3790 if ((cur = tb[TUNNEL_ATTR_TTL]))
3791 p.iph.ttl = blobmsg_get_u32(cur);
3792
3793 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3794 char *str = blobmsg_get_string(cur);
3795 if (strcmp(str, "inherit")) {
3796 unsigned uval;
3797
3798 if (!system_tos_aton(str, &uval))
3799 return -EINVAL;
3800
3801 p.iph.tos = uval;
3802 } else
3803 p.iph.tos = 1;
3804 }
3805
3806 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3807 /* ttl !=0 and nopmtudisc are incompatible */
3808 if (p.iph.ttl && p.iph.frag_off == 0)
3809 return -EINVAL;
3810
3811 strncpy(p.name, name, sizeof(p.name) - 1);
3812
3813 switch (p.iph.protocol) {
3814 case IPPROTO_IPIP:
3815 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3816 case IPPROTO_IPV6:
3817 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3818 default:
3819 break;
3820 }
3821 return -1;
3822 }
3823
3824 int system_del_ip_tunnel(const struct device *dev)
3825 {
3826 return system_link_del(dev->ifname);
3827 }
3828
3829 int system_update_ipv6_mtu(struct device *dev, int mtu)
3830 {
3831 int ret = -1;
3832 char buf[64];
3833 int fd;
3834
3835 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
3836 if (fd < 0)
3837 return ret;
3838
3839 if (!mtu) {
3840 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3841 if (len < 0)
3842 goto out;
3843
3844 buf[len] = 0;
3845 ret = atoi(buf);
3846 } else {
3847 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3848 ret = mtu;
3849 }
3850
3851 out:
3852 close(fd);
3853 return ret;
3854 }
3855
3856 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
3857 {
3858 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3859 struct blob_attr *cur;
3860 const char *str;
3861
3862 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3863 blob_data(attr), blob_len(attr));
3864
3865 system_link_del(dev->ifname);
3866
3867 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3868 return -EINVAL;
3869 str = blobmsg_data(cur);
3870
3871 unsigned int ttl = 0;
3872 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3873 ttl = blobmsg_get_u32(cur);
3874 if (ttl > 255)
3875 return -EINVAL;
3876 }
3877
3878 unsigned int link = 0;
3879 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3880 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3881 if (!iface)
3882 return -EINVAL;
3883
3884 if (iface->l3_dev.dev)
3885 link = iface->l3_dev.dev->ifindex;
3886 }
3887
3888 if (!strcmp(str, "sit"))
3889 return system_add_sit_tunnel(dev->ifname, link, tb);
3890 #ifdef IFLA_IPTUN_MAX
3891 else if (!strcmp(str, "ipip6")) {
3892 return system_add_ip6_tunnel(dev->ifname, link, tb);
3893 } else if (!strcmp(str, "greip")) {
3894 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
3895 } else if (!strcmp(str, "gretapip")) {
3896 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
3897 } else if (!strcmp(str, "greip6")) {
3898 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
3899 } else if (!strcmp(str, "gretapip6")) {
3900 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
3901 #ifdef IFLA_VTI_MAX
3902 } else if (!strcmp(str, "vtiip")) {
3903 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
3904 } else if (!strcmp(str, "vtiip6")) {
3905 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
3906 #endif
3907 #ifdef IFLA_XFRM_MAX
3908 } else if (!strcmp(str, "xfrm")) {
3909 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
3910 #endif
3911 #ifdef IFLA_VXLAN_MAX
3912 } else if(!strcmp(str, "vxlan")) {
3913 return system_add_vxlan(dev->ifname, link, tb, false);
3914 } else if(!strcmp(str, "vxlan6")) {
3915 return system_add_vxlan(dev->ifname, link, tb, true);
3916 #endif
3917 #endif
3918 } else if (!strcmp(str, "ipip")) {
3919 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
3920 }
3921 else
3922 return -EINVAL;
3923
3924 return 0;
3925 }
OpenWrt Network interface configuration daemon