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