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