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621f99b3fd6984412aeac47ef26a53370b7b321a
[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 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17 #define _GNU_SOURCE
18
19 #include <sys/socket.h>
20 #include <sys/ioctl.h>
21 #include <sys/stat.h>
22 #include <sys/syscall.h>
23
24 #include <net/if.h>
25 #include <net/if_arp.h>
26
27 #include <arpa/inet.h>
28 #include <netinet/in.h>
29
30 #include <linux/rtnetlink.h>
31 #include <linux/sockios.h>
32 #include <linux/ip.h>
33 #include <linux/if_addr.h>
34 #include <linux/if_link.h>
35 #include <linux/if_vlan.h>
36 #include <linux/if_bridge.h>
37 #include <linux/if_tunnel.h>
38 #include <linux/ip6_tunnel.h>
39 #include <linux/ethtool.h>
40 #include <linux/fib_rules.h>
41 #include <linux/version.h>
42
43 #ifndef RTN_FAILED_POLICY
44 #define RTN_FAILED_POLICY 12
45 #endif
46
47 #ifndef IFA_F_NOPREFIXROUTE
48 #define IFA_F_NOPREFIXROUTE 0x200
49 #endif
50
51 #ifndef IFA_FLAGS
52 #define IFA_FLAGS (IFA_MULTICAST + 1)
53 #endif
54
55
56 #include <string.h>
57 #include <fcntl.h>
58 #include <glob.h>
59 #include <time.h>
60 #include <unistd.h>
61
62 #include <netlink/msg.h>
63 #include <netlink/attr.h>
64 #include <netlink/socket.h>
65 #include <libubox/uloop.h>
66
67 #include "netifd.h"
68 #include "device.h"
69 #include "system.h"
70
71 struct event_socket {
72 struct uloop_fd uloop;
73 struct nl_sock *sock;
74 int bufsize;
75 };
76
77 static int sock_ioctl = -1;
78 static struct nl_sock *sock_rtnl = NULL;
79
80 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
81 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
82
83 static char dev_buf[256];
84
85 static void
86 handler_nl_event(struct uloop_fd *u, unsigned int events)
87 {
88 struct event_socket *ev = container_of(u, struct event_socket, uloop);
89 int err;
90 socklen_t errlen = sizeof(err);
91
92 if (!u->error) {
93 nl_recvmsgs_default(ev->sock);
94 return;
95 }
96
97 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
98 goto abort;
99
100 switch(err) {
101 case ENOBUFS:
102 // Increase rx buffer size on netlink socket
103 ev->bufsize *= 2;
104 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
105 goto abort;
106
107 // Request full dump since some info got dropped
108 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
109 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
110 break;
111
112 default:
113 goto abort;
114 }
115 u->error = false;
116 return;
117
118 abort:
119 uloop_fd_delete(&ev->uloop);
120 return;
121 }
122
123 static struct nl_sock *
124 create_socket(int protocol, int groups)
125 {
126 struct nl_sock *sock;
127
128 sock = nl_socket_alloc();
129 if (!sock)
130 return NULL;
131
132 if (groups)
133 nl_join_groups(sock, groups);
134
135 if (nl_connect(sock, protocol))
136 return NULL;
137
138 return sock;
139 }
140
141 static bool
142 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
143 uloop_fd_handler cb, int flags)
144 {
145 ev->sock = create_socket(protocol, groups);
146 if (!ev->sock)
147 return false;
148
149 ev->uloop.fd = nl_socket_get_fd(ev->sock);
150 ev->uloop.cb = cb;
151 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
152 return false;
153
154 return true;
155 }
156
157 static bool
158 create_event_socket(struct event_socket *ev, int protocol,
159 int (*cb)(struct nl_msg *msg, void *arg))
160 {
161 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
162 return false;
163
164 // Install the valid custom callback handler
165 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
166
167 // Disable sequence number checking on event sockets
168 nl_socket_disable_seq_check(ev->sock);
169
170 // Increase rx buffer size to 65K on event sockets
171 ev->bufsize = 65535;
172 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
173 return false;
174
175 return true;
176 }
177
178 static bool
179 system_rtn_aton(const char *src, unsigned int *dst)
180 {
181 char *e;
182 unsigned int n;
183
184 if (!strcmp(src, "local"))
185 n = RTN_LOCAL;
186 else if (!strcmp(src, "nat"))
187 n = RTN_NAT;
188 else if (!strcmp(src, "broadcast"))
189 n = RTN_BROADCAST;
190 else if (!strcmp(src, "anycast"))
191 n = RTN_ANYCAST;
192 else if (!strcmp(src, "multicast"))
193 n = RTN_MULTICAST;
194 else if (!strcmp(src, "prohibit"))
195 n = RTN_PROHIBIT;
196 else if (!strcmp(src, "unreachable"))
197 n = RTN_UNREACHABLE;
198 else if (!strcmp(src, "blackhole"))
199 n = RTN_BLACKHOLE;
200 else if (!strcmp(src, "xresolve"))
201 n = RTN_XRESOLVE;
202 else if (!strcmp(src, "unicast"))
203 n = RTN_UNICAST;
204 else if (!strcmp(src, "throw"))
205 n = RTN_THROW;
206 else if (!strcmp(src, "failed_policy"))
207 n = RTN_FAILED_POLICY;
208 else {
209 n = strtoul(src, &e, 0);
210 if (!e || *e || e == src || n > 255)
211 return false;
212 }
213
214 *dst = n;
215 return true;
216 }
217
218 static bool
219 system_tos_aton(const char *src, unsigned *dst)
220 {
221 char *e;
222
223 *dst = strtoul(src, &e, 16);
224 if (e == src || *e || *dst > 255)
225 return false;
226
227 return true;
228 }
229
230 int system_init(void)
231 {
232 static struct event_socket rtnl_event;
233 static struct event_socket hotplug_event;
234
235 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
236 system_fd_set_cloexec(sock_ioctl);
237
238 // Prepare socket for routing / address control
239 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
240 if (!sock_rtnl)
241 return -1;
242
243 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
244 return -1;
245
246 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
247 handle_hotplug_event, 0))
248 return -1;
249
250 // Receive network link events form kernel
251 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
252
253 return 0;
254 }
255
256 static void system_set_sysctl(const char *path, const char *val)
257 {
258 int fd;
259
260 fd = open(path, O_WRONLY);
261 if (fd < 0)
262 return;
263
264 if (write(fd, val, strlen(val))) {}
265 close(fd);
266 }
267
268 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
269 {
270 snprintf(dev_buf, sizeof(dev_buf), path, device);
271 system_set_sysctl(dev_buf, val);
272 }
273
274 static void system_set_disable_ipv6(struct device *dev, const char *val)
275 {
276 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
277 }
278
279 static void system_set_rpfilter(struct device *dev, const char *val)
280 {
281 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
282 }
283
284 static void system_set_acceptlocal(struct device *dev, const char *val)
285 {
286 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
287 }
288
289 static void system_set_igmpversion(struct device *dev, const char *val)
290 {
291 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
292 }
293
294 static void system_set_mldversion(struct device *dev, const char *val)
295 {
296 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
297 }
298
299 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
300 {
301 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
302 }
303
304 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
305 {
306 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
307 }
308
309 static void system_set_dadtransmits(struct device *dev, const char *val)
310 {
311 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
312 }
313
314 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
315 {
316 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
317 }
318
319 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
320 {
321 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
322 }
323
324 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
325 {
326 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
327 "/sys/class/net/%s/brport/multicast_router",
328 dev->ifname, val);
329 }
330
331 static void system_bridge_set_robustness(struct device *dev, const char *val)
332 {
333 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
334 dev->ifname, val);
335 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
336 dev->ifname, val);
337 }
338
339 static void system_bridge_set_query_interval(struct device *dev, const char *val)
340 {
341 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
342 dev->ifname, val);
343 }
344
345 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
346 {
347 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
348 dev->ifname, val);
349 }
350
351 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
352 {
353 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
354 dev->ifname, val);
355 }
356
357 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
358 {
359 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
360 dev->ifname, val);
361 }
362
363 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
364 {
365 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
366 dev->ifname, val);
367 }
368
369 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
370 {
371 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
372 dev->ifname, val);
373 }
374
375 static void system_bridge_set_learning(struct device *dev, const char *val)
376 {
377 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
378 }
379
380 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
381 {
382 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
383 }
384
385 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
386 {
387 int fd = -1, ret = -1;
388
389 fd = open(path, O_RDONLY);
390 if (fd < 0)
391 goto out;
392
393 ssize_t len = read(fd, buf, buf_sz - 1);
394 if (len < 0)
395 goto out;
396
397 ret = buf[len] = 0;
398
399 out:
400 if (fd >= 0)
401 close(fd);
402
403 return ret;
404 }
405
406 static int
407 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
408 {
409 snprintf(dev_buf, sizeof(dev_buf), path, device);
410 return system_get_sysctl(dev_buf, buf, buf_sz);
411 }
412
413 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
414 {
415 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
416 dev->ifname, buf, buf_sz);
417 }
418
419 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
420 {
421 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
422 dev->ifname, buf, buf_sz);
423 }
424
425 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
426 {
427 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
428 dev->ifname, buf, buf_sz);
429 }
430
431 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
432 {
433 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
434 dev->ifname, buf, buf_sz);
435 }
436
437 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
438 {
439 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
440 dev->ifname, buf, buf_sz);
441 }
442
443 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
444 {
445 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
446 dev->ifname, buf, buf_sz);
447 }
448
449 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
450 {
451 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
452 dev->ifname, buf, buf_sz);
453 }
454
455 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
456 {
457 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
458 dev->ifname, buf, buf_sz);
459 }
460
461 // Evaluate netlink messages
462 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
463 {
464 struct nlmsghdr *nh = nlmsg_hdr(msg);
465 struct nlattr *nla[__IFLA_MAX];
466 int link_state = 0;
467 char buf[10];
468
469 if (nh->nlmsg_type != RTM_NEWLINK)
470 goto out;
471
472 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
473 if (!nla[IFLA_IFNAME])
474 goto out;
475
476 struct device *dev = device_get(nla_data(nla[IFLA_IFNAME]), false);
477 if (!dev)
478 goto out;
479
480 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
481 link_state = strtoul(buf, NULL, 0);
482
483 device_set_link(dev, link_state ? true : false);
484
485 out:
486 return 0;
487 }
488
489 static void
490 handle_hotplug_msg(char *data, int size)
491 {
492 const char *subsystem = NULL, *interface = NULL;
493 char *cur, *end, *sep;
494 struct device *dev;
495 int skip;
496 bool add;
497
498 if (!strncmp(data, "add@", 4))
499 add = true;
500 else if (!strncmp(data, "remove@", 7))
501 add = false;
502 else
503 return;
504
505 skip = strlen(data) + 1;
506 end = data + size;
507
508 for (cur = data + skip; cur < end; cur += skip) {
509 skip = strlen(cur) + 1;
510
511 sep = strchr(cur, '=');
512 if (!sep)
513 continue;
514
515 *sep = 0;
516 if (!strcmp(cur, "INTERFACE"))
517 interface = sep + 1;
518 else if (!strcmp(cur, "SUBSYSTEM")) {
519 subsystem = sep + 1;
520 if (strcmp(subsystem, "net") != 0)
521 return;
522 }
523 if (subsystem && interface)
524 goto found;
525 }
526 return;
527
528 found:
529 dev = device_get(interface, false);
530 if (!dev)
531 return;
532
533 if (dev->type != &simple_device_type)
534 return;
535
536 if (add && system_if_force_external(dev->ifname))
537 return;
538
539 device_set_present(dev, add);
540 }
541
542 static void
543 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
544 {
545 struct event_socket *ev = container_of(u, struct event_socket, uloop);
546 struct sockaddr_nl nla;
547 unsigned char *buf = NULL;
548 int size;
549
550 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
551 if (nla.nl_pid == 0)
552 handle_hotplug_msg((char *) buf, size);
553
554 free(buf);
555 }
556 }
557
558 static int system_rtnl_call(struct nl_msg *msg)
559 {
560 int ret;
561
562 ret = nl_send_auto_complete(sock_rtnl, msg);
563 nlmsg_free(msg);
564
565 if (ret < 0)
566 return ret;
567
568 return nl_wait_for_ack(sock_rtnl);
569 }
570
571 int system_bridge_delbr(struct device *bridge)
572 {
573 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
574 }
575
576 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
577 {
578 struct ifreq ifr;
579
580 memset(&ifr, 0, sizeof(ifr));
581 if (dev)
582 ifr.ifr_ifindex = dev->ifindex;
583 else
584 ifr.ifr_data = data;
585 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
586 return ioctl(sock_ioctl, cmd, &ifr);
587 }
588
589 static bool system_is_bridge(const char *name, char *buf, int buflen)
590 {
591 struct stat st;
592
593 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
594 if (stat(buf, &st) < 0)
595 return false;
596
597 return true;
598 }
599
600 static char *system_get_bridge(const char *name, char *buf, int buflen)
601 {
602 char *path;
603 ssize_t len = -1;
604 glob_t gl;
605
606 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
607 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
608 return NULL;
609
610 if (gl.gl_pathc > 0)
611 len = readlink(gl.gl_pathv[0], buf, buflen);
612
613 globfree(&gl);
614
615 if (len < 0)
616 return NULL;
617
618 buf[len] = 0;
619 path = strrchr(buf, '/');
620 if (!path)
621 return NULL;
622
623 return path + 1;
624 }
625
626 static void
627 system_bridge_set_wireless(struct device *bridge, struct device *dev)
628 {
629 bool mcast_to_ucast = dev->wireless_ap;
630 bool hairpin = true;
631
632 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
633 !bridge->settings.multicast_to_unicast)
634 mcast_to_ucast = false;
635
636 if (!mcast_to_ucast || dev->wireless_isolate)
637 hairpin = false;
638
639 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
640 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
641 }
642
643 int system_bridge_addif(struct device *bridge, struct device *dev)
644 {
645 char buf[64];
646 char *oldbr;
647 int ret = 0;
648
649 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
650 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
651 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
652
653 if (dev->wireless)
654 system_bridge_set_wireless(bridge, dev);
655
656 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
657 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
658 system_bridge_set_multicast_router(dev, buf, false);
659 }
660
661 if (dev->settings.flags & DEV_OPT_LEARNING &&
662 !dev->settings.learning)
663 system_bridge_set_learning(dev, "0");
664
665 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
666 !dev->settings.unicast_flood)
667 system_bridge_set_unicast_flood(dev, "0");
668
669 return ret;
670 }
671
672 int system_bridge_delif(struct device *bridge, struct device *dev)
673 {
674 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
675 }
676
677 int system_if_resolve(struct device *dev)
678 {
679 struct ifreq ifr;
680 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
681 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
682 return ifr.ifr_ifindex;
683 else
684 return 0;
685 }
686
687 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
688 {
689 struct ifreq ifr;
690
691 memset(&ifr, 0, sizeof(ifr));
692 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
693 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
694 ifr.ifr_flags |= add;
695 ifr.ifr_flags &= ~rem;
696 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
697 }
698
699 struct clear_data {
700 struct nl_msg *msg;
701 struct device *dev;
702 int type;
703 int size;
704 int af;
705 };
706
707
708 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
709 {
710 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
711
712 return ifa->ifa_index == ifindex;
713 }
714
715 static bool check_route(struct nlmsghdr *hdr, int ifindex)
716 {
717 struct rtmsg *r = NLMSG_DATA(hdr);
718 struct nlattr *tb[__RTA_MAX];
719
720 if (r->rtm_protocol == RTPROT_KERNEL &&
721 r->rtm_family == AF_INET6)
722 return false;
723
724 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
725 if (!tb[RTA_OIF])
726 return false;
727
728 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
729 }
730
731 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
732 {
733 return true;
734 }
735
736 static int cb_clear_event(struct nl_msg *msg, void *arg)
737 {
738 struct clear_data *clr = arg;
739 struct nlmsghdr *hdr = nlmsg_hdr(msg);
740 bool (*cb)(struct nlmsghdr *, int ifindex);
741 int type;
742
743 switch(clr->type) {
744 case RTM_GETADDR:
745 type = RTM_DELADDR;
746 if (hdr->nlmsg_type != RTM_NEWADDR)
747 return NL_SKIP;
748
749 cb = check_ifaddr;
750 break;
751 case RTM_GETROUTE:
752 type = RTM_DELROUTE;
753 if (hdr->nlmsg_type != RTM_NEWROUTE)
754 return NL_SKIP;
755
756 cb = check_route;
757 break;
758 case RTM_GETRULE:
759 type = RTM_DELRULE;
760 if (hdr->nlmsg_type != RTM_NEWRULE)
761 return NL_SKIP;
762
763 cb = check_rule;
764 break;
765 default:
766 return NL_SKIP;
767 }
768
769 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
770 return NL_SKIP;
771
772 if (type == RTM_DELRULE)
773 D(SYSTEM, "Remove a rule\n");
774 else
775 D(SYSTEM, "Remove %s from device %s\n",
776 type == RTM_DELADDR ? "an address" : "a route",
777 clr->dev->ifname);
778 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
779 hdr = nlmsg_hdr(clr->msg);
780 hdr->nlmsg_type = type;
781 hdr->nlmsg_flags = NLM_F_REQUEST;
782
783 nl_socket_disable_auto_ack(sock_rtnl);
784 nl_send_auto_complete(sock_rtnl, clr->msg);
785 nl_socket_enable_auto_ack(sock_rtnl);
786
787 return NL_SKIP;
788 }
789
790 static int
791 cb_finish_event(struct nl_msg *msg, void *arg)
792 {
793 int *pending = arg;
794 *pending = 0;
795 return NL_STOP;
796 }
797
798 static int
799 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
800 {
801 int *pending = arg;
802 *pending = err->error;
803 return NL_STOP;
804 }
805
806 static void
807 system_if_clear_entries(struct device *dev, int type, int af)
808 {
809 struct clear_data clr;
810 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
811 struct rtmsg rtm = {
812 .rtm_family = af,
813 .rtm_flags = RTM_F_CLONED,
814 };
815 int flags = NLM_F_DUMP;
816 int pending = 1;
817
818 clr.af = af;
819 clr.dev = dev;
820 clr.type = type;
821 switch (type) {
822 case RTM_GETADDR:
823 case RTM_GETRULE:
824 clr.size = sizeof(struct rtgenmsg);
825 break;
826 case RTM_GETROUTE:
827 clr.size = sizeof(struct rtmsg);
828 break;
829 default:
830 return;
831 }
832
833 if (!cb)
834 return;
835
836 clr.msg = nlmsg_alloc_simple(type, flags);
837 if (!clr.msg)
838 goto out;
839
840 nlmsg_append(clr.msg, &rtm, clr.size, 0);
841 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
842 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
843 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
844
845 nl_send_auto_complete(sock_rtnl, clr.msg);
846 while (pending > 0)
847 nl_recvmsgs(sock_rtnl, cb);
848
849 nlmsg_free(clr.msg);
850 out:
851 nl_cb_put(cb);
852 }
853
854 /*
855 * Clear bridge (membership) state and bring down device
856 */
857 void system_if_clear_state(struct device *dev)
858 {
859 static char buf[256];
860 char *bridge;
861
862 device_set_ifindex(dev, system_if_resolve(dev));
863 if (dev->external || !dev->ifindex)
864 return;
865
866 system_if_flags(dev->ifname, 0, IFF_UP);
867
868 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
869 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
870 system_bridge_delbr(dev);
871 return;
872 }
873
874 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
875 if (bridge) {
876 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
877 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
878 }
879
880 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
881 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
882 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
883 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
884 system_set_disable_ipv6(dev, "0");
885 }
886
887 static inline unsigned long
888 sec_to_jiffies(int val)
889 {
890 return (unsigned long) val * 100;
891 }
892
893 static void system_bridge_conf_multicast_deps(struct device *bridge,
894 struct bridge_config *cfg,
895 char *buf,
896 int buf_len)
897 {
898 int val;
899
900 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
901 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
902 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
903 val = cfg->robustness * cfg->query_interval +
904 cfg->query_response_interval;
905
906 snprintf(buf, buf_len, "%i", val);
907 system_bridge_set_membership_interval(bridge, buf);
908
909 val = cfg->robustness * cfg->query_interval +
910 cfg->query_response_interval / 2;
911
912 snprintf(buf, buf_len, "%i", val);
913 system_bridge_set_other_querier_timeout(bridge, buf);
914 }
915
916 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
917 val = cfg->query_interval / 4;
918
919 snprintf(buf, buf_len, "%i", val);
920 system_bridge_set_startup_query_interval(bridge, buf);
921 }
922 }
923
924 static void system_bridge_conf_multicast(struct device *bridge,
925 struct bridge_config *cfg,
926 char *buf,
927 int buf_len)
928 {
929 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
930 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
931
932 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
933 bridge->ifname, cfg->multicast_querier ? "1" : "0");
934
935 snprintf(buf, buf_len, "%i", cfg->hash_max);
936 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
937 bridge->ifname, buf);
938
939 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
940 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
941 system_bridge_set_multicast_router(bridge, buf, true);
942 }
943
944 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
945 snprintf(buf, buf_len, "%i", cfg->robustness);
946 system_bridge_set_robustness(bridge, buf);
947 }
948
949 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
950 snprintf(buf, buf_len, "%i", cfg->query_interval);
951 system_bridge_set_query_interval(bridge, buf);
952 }
953
954 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
955 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
956 system_bridge_set_query_response_interval(bridge, buf);
957 }
958
959 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
960 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
961 system_bridge_set_last_member_interval(bridge, buf);
962 }
963
964 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
965 }
966
967 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
968 {
969 char buf[64];
970 unsigned long args[4] = {};
971
972 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
973 return -1;
974
975 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
976 args[1] = !!cfg->stp;
977 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
978
979 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
980 args[1] = sec_to_jiffies(cfg->forward_delay);
981 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
982
983 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
984
985 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
986 args[1] = cfg->priority;
987 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
988
989 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
990 args[0] = BRCTL_SET_AGEING_TIME;
991 args[1] = sec_to_jiffies(cfg->ageing_time);
992 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
993 }
994
995 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
996 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
997 args[1] = sec_to_jiffies(cfg->hello_time);
998 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
999 }
1000
1001 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1002 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1003 args[1] = sec_to_jiffies(cfg->max_age);
1004 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1005 }
1006
1007 return 0;
1008 }
1009
1010 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1011 {
1012 struct nl_msg *msg;
1013 struct nlattr *linkinfo, *data;
1014 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1015 int i, rv;
1016 static const struct {
1017 const char *name;
1018 enum macvlan_mode val;
1019 } modes[] = {
1020 { "private", MACVLAN_MODE_PRIVATE },
1021 { "vepa", MACVLAN_MODE_VEPA },
1022 { "bridge", MACVLAN_MODE_BRIDGE },
1023 { "passthru", MACVLAN_MODE_PASSTHRU },
1024 };
1025
1026 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1027
1028 if (!msg)
1029 return -1;
1030
1031 nlmsg_append(msg, &iim, sizeof(iim), 0);
1032
1033 if (cfg->flags & MACVLAN_OPT_MACADDR)
1034 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1035 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1036 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1037
1038 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1039 goto nla_put_failure;
1040
1041 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1042
1043 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1044 goto nla_put_failure;
1045
1046 if (cfg->mode) {
1047 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1048 if (strcmp(cfg->mode, modes[i].name) != 0)
1049 continue;
1050
1051 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1052 break;
1053 }
1054 }
1055
1056 nla_nest_end(msg, data);
1057 nla_nest_end(msg, linkinfo);
1058
1059 rv = system_rtnl_call(msg);
1060 if (rv)
1061 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1062
1063 return rv;
1064
1065 nla_put_failure:
1066 nlmsg_free(msg);
1067 return -ENOMEM;
1068 }
1069
1070 static int system_link_del(const char *ifname)
1071 {
1072 struct nl_msg *msg;
1073 struct ifinfomsg iim = {
1074 .ifi_family = AF_UNSPEC,
1075 .ifi_index = 0,
1076 };
1077
1078 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1079
1080 if (!msg)
1081 return -1;
1082
1083 nlmsg_append(msg, &iim, sizeof(iim), 0);
1084 nla_put_string(msg, IFLA_IFNAME, ifname);
1085 return system_rtnl_call(msg);
1086 }
1087
1088 int system_macvlan_del(struct device *macvlan)
1089 {
1090 return system_link_del(macvlan->ifname);
1091 }
1092
1093 static int system_vlan(struct device *dev, int id)
1094 {
1095 struct vlan_ioctl_args ifr = {
1096 .cmd = SET_VLAN_NAME_TYPE_CMD,
1097 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1098 };
1099
1100 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1101
1102 if (id < 0) {
1103 ifr.cmd = DEL_VLAN_CMD;
1104 ifr.u.VID = 0;
1105 } else {
1106 ifr.cmd = ADD_VLAN_CMD;
1107 ifr.u.VID = id;
1108 }
1109 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1110 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1111 }
1112
1113 int system_vlan_add(struct device *dev, int id)
1114 {
1115 return system_vlan(dev, id);
1116 }
1117
1118 int system_vlan_del(struct device *dev)
1119 {
1120 return system_vlan(dev, -1);
1121 }
1122
1123 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1124 {
1125 struct nl_msg *msg;
1126 struct nlattr *linkinfo, *data;
1127 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1128 int rv;
1129
1130 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1131
1132 if (!msg)
1133 return -1;
1134
1135 nlmsg_append(msg, &iim, sizeof(iim), 0);
1136 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1137 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1138
1139 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1140 goto nla_put_failure;
1141
1142 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1143
1144 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1145 goto nla_put_failure;
1146
1147 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1148
1149 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1150 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1151 #else
1152 if(cfg->proto == VLAN_PROTO_8021AD)
1153 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);
1154 #endif
1155
1156 nla_nest_end(msg, data);
1157 nla_nest_end(msg, linkinfo);
1158
1159 rv = system_rtnl_call(msg);
1160 if (rv)
1161 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1162
1163 return rv;
1164
1165 nla_put_failure:
1166 nlmsg_free(msg);
1167 return -ENOMEM;
1168 }
1169
1170 int system_vlandev_del(struct device *vlandev)
1171 {
1172 return system_link_del(vlandev->ifname);
1173 }
1174
1175 void
1176 system_if_get_settings(struct device *dev, struct device_settings *s)
1177 {
1178 struct ifreq ifr;
1179 char buf[10];
1180
1181 memset(&ifr, 0, sizeof(ifr));
1182 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1183
1184 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1185 s->mtu = ifr.ifr_mtu;
1186 s->flags |= DEV_OPT_MTU;
1187 }
1188
1189 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1190 if (s->mtu6 > 0)
1191 s->flags |= DEV_OPT_MTU6;
1192
1193 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1194 s->txqueuelen = ifr.ifr_qlen;
1195 s->flags |= DEV_OPT_TXQUEUELEN;
1196 }
1197
1198 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1199 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1200 s->flags |= DEV_OPT_MACADDR;
1201 }
1202
1203 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1204 s->ipv6 = !strtoul(buf, NULL, 0);
1205 s->flags |= DEV_OPT_IPV6;
1206 }
1207
1208 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1209 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1210 s->flags |= DEV_OPT_PROMISC;
1211
1212 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1213 s->flags |= DEV_OPT_MULTICAST;
1214 }
1215
1216 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1217 s->rpfilter = strtoul(buf, NULL, 0);
1218 s->flags |= DEV_OPT_RPFILTER;
1219 }
1220
1221 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1222 s->acceptlocal = strtoul(buf, NULL, 0);
1223 s->flags |= DEV_OPT_ACCEPTLOCAL;
1224 }
1225
1226 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1227 s->igmpversion = strtoul(buf, NULL, 0);
1228 s->flags |= DEV_OPT_IGMPVERSION;
1229 }
1230
1231 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1232 s->mldversion = strtoul(buf, NULL, 0);
1233 s->flags |= DEV_OPT_MLDVERSION;
1234 }
1235
1236 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1237 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1238 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1239 }
1240
1241 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1242 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1243 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1244 }
1245
1246 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1247 s->dadtransmits = strtoul(buf, NULL, 0);
1248 s->flags |= DEV_OPT_DADTRANSMITS;
1249 }
1250 }
1251
1252 static void
1253 system_if_set_rps_xps_val(const char *path, int val)
1254 {
1255 char val_buf[8];
1256 glob_t gl;
1257 int i;
1258
1259 if (glob(path, 0, NULL, &gl))
1260 return;
1261
1262 snprintf(val_buf, sizeof(val_buf), "%x", val);
1263 for (i = 0; i < gl.gl_pathc; i++)
1264 system_set_sysctl(gl.gl_pathv[i], val_buf);
1265
1266 globfree(&gl);
1267 }
1268
1269 static void
1270 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1271 {
1272 long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1273 int val;
1274
1275 if (n_cpus < 2)
1276 return;
1277
1278 val = (1 << n_cpus) - 1;
1279 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1280 system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1281
1282 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1283 system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1284 }
1285
1286 void
1287 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1288 {
1289 struct ifreq ifr;
1290 char buf[12];
1291
1292 memset(&ifr, 0, sizeof(ifr));
1293 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1294 if (s->flags & DEV_OPT_MTU & apply_mask) {
1295 ifr.ifr_mtu = s->mtu;
1296 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1297 s->flags &= ~DEV_OPT_MTU;
1298 }
1299 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1300 system_update_ipv6_mtu(dev, s->mtu6);
1301 }
1302 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1303 ifr.ifr_qlen = s->txqueuelen;
1304 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1305 s->flags &= ~DEV_OPT_TXQUEUELEN;
1306 }
1307 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1308 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1309 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1310 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1311 s->flags &= ~DEV_OPT_MACADDR;
1312 }
1313 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1314 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1315 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1316 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1317 !s->promisc ? IFF_PROMISC : 0) < 0)
1318 s->flags &= ~DEV_OPT_PROMISC;
1319 }
1320 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1321 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1322 system_set_rpfilter(dev, buf);
1323 }
1324 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1325 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1326 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1327 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1328 system_set_igmpversion(dev, buf);
1329 }
1330 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1331 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1332 system_set_mldversion(dev, buf);
1333 }
1334 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1335 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1336 system_set_neigh4reachabletime(dev, buf);
1337 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1338 system_set_neigh6reachabletime(dev, buf);
1339 }
1340 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1341 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1342 system_set_dadtransmits(dev, buf);
1343 }
1344 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1345 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1346 !s->multicast ? IFF_MULTICAST : 0) < 0)
1347 s->flags &= ~DEV_OPT_MULTICAST;
1348 }
1349
1350 system_if_apply_rps_xps(dev, s);
1351 }
1352
1353 int system_if_up(struct device *dev)
1354 {
1355 system_if_get_settings(dev, &dev->orig_settings);
1356 /* Only keep orig settings based on what needs to be set */
1357 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1358 dev->orig_settings.flags &= dev->settings.flags;
1359 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1360 return system_if_flags(dev->ifname, IFF_UP, 0);
1361 }
1362
1363 int system_if_down(struct device *dev)
1364 {
1365 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1366 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1367 return ret;
1368 }
1369
1370 struct if_check_data {
1371 struct device *dev;
1372 int pending;
1373 int ret;
1374 };
1375
1376 #ifndef IFF_LOWER_UP
1377 #define IFF_LOWER_UP 0x10000
1378 #endif
1379
1380 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1381 {
1382 struct nlmsghdr *nh = nlmsg_hdr(msg);
1383 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1384 struct if_check_data *chk = (struct if_check_data *)arg;
1385
1386 if (nh->nlmsg_type != RTM_NEWLINK)
1387 return NL_SKIP;
1388
1389 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1390 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1391
1392 return NL_OK;
1393 }
1394
1395 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1396 {
1397 struct if_check_data *chk = (struct if_check_data *)arg;
1398 chk->pending = 0;
1399 return NL_STOP;
1400 }
1401
1402 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1403 {
1404 struct if_check_data *chk = (struct if_check_data *)arg;
1405
1406 device_set_present(chk->dev, false);
1407 device_set_link(chk->dev, false);
1408 chk->pending = err->error;
1409
1410 return NL_STOP;
1411 }
1412
1413 int system_if_check(struct device *dev)
1414 {
1415 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1416 struct nl_msg *msg;
1417 struct ifinfomsg ifi = {
1418 .ifi_family = AF_UNSPEC,
1419 .ifi_index = 0,
1420 };
1421 struct if_check_data chk = {
1422 .dev = dev,
1423 .pending = 1,
1424 };
1425 int ret = 1;
1426
1427 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1428 if (!msg)
1429 goto out;
1430
1431 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1432 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1433 goto free;
1434
1435 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1436 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1437 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1438
1439 nl_send_auto_complete(sock_rtnl, msg);
1440 while (chk.pending > 0)
1441 nl_recvmsgs(sock_rtnl, cb);
1442
1443 ret = chk.pending;
1444
1445 free:
1446 nlmsg_free(msg);
1447 out:
1448 nl_cb_put(cb);
1449 return ret;
1450 }
1451
1452 struct device *
1453 system_if_get_parent(struct device *dev)
1454 {
1455 char buf[64], *devname;
1456 int ifindex, iflink, len;
1457 FILE *f;
1458
1459 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1460 f = fopen(buf, "r");
1461 if (!f)
1462 return NULL;
1463
1464 len = fread(buf, 1, sizeof(buf) - 1, f);
1465 fclose(f);
1466
1467 if (len <= 0)
1468 return NULL;
1469
1470 buf[len] = 0;
1471 iflink = strtoul(buf, NULL, 0);
1472 ifindex = system_if_resolve(dev);
1473 if (!iflink || iflink == ifindex)
1474 return NULL;
1475
1476 devname = if_indextoname(iflink, buf);
1477 if (!devname)
1478 return NULL;
1479
1480 return device_get(devname, true);
1481 }
1482
1483 static bool
1484 read_string_file(int dir_fd, const char *file, char *buf, int len)
1485 {
1486 bool ret = false;
1487 char *c;
1488 int fd;
1489
1490 fd = openat(dir_fd, file, O_RDONLY);
1491 if (fd < 0)
1492 return false;
1493
1494 retry:
1495 len = read(fd, buf, len - 1);
1496 if (len < 0) {
1497 if (errno == EINTR)
1498 goto retry;
1499 } else if (len > 0) {
1500 buf[len] = 0;
1501
1502 c = strchr(buf, '\n');
1503 if (c)
1504 *c = 0;
1505
1506 ret = true;
1507 }
1508
1509 close(fd);
1510
1511 return ret;
1512 }
1513
1514 static bool
1515 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1516 {
1517 char buf[64];
1518 bool ret = false;
1519
1520 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1521 if (ret)
1522 *val = strtoull(buf, NULL, 0);
1523
1524 return ret;
1525 }
1526
1527 /* Assume advertised flags == supported flags */
1528 static const struct {
1529 uint32_t mask;
1530 const char *name;
1531 } ethtool_link_modes[] = {
1532 { ADVERTISED_10baseT_Half, "10H" },
1533 { ADVERTISED_10baseT_Full, "10F" },
1534 { ADVERTISED_100baseT_Half, "100H" },
1535 { ADVERTISED_100baseT_Full, "100F" },
1536 { ADVERTISED_1000baseT_Half, "1000H" },
1537 { ADVERTISED_1000baseT_Full, "1000F" },
1538 };
1539
1540 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1541 {
1542 int i;
1543 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1544 if (mask & ethtool_link_modes[i].mask)
1545 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1546 }
1547 }
1548
1549 bool
1550 system_if_force_external(const char *ifname)
1551 {
1552 char buf[64];
1553 struct stat s;
1554
1555 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1556 return stat(buf, &s) == 0;
1557 }
1558
1559 int
1560 system_if_dump_info(struct device *dev, struct blob_buf *b)
1561 {
1562 struct ethtool_cmd ecmd;
1563 struct ifreq ifr;
1564 char buf[64], *s;
1565 void *c;
1566 int dir_fd;
1567
1568 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1569 dir_fd = open(buf, O_DIRECTORY);
1570
1571 memset(&ecmd, 0, sizeof(ecmd));
1572 memset(&ifr, 0, sizeof(ifr));
1573 strcpy(ifr.ifr_name, dev->ifname);
1574 ifr.ifr_data = (caddr_t) &ecmd;
1575 ecmd.cmd = ETHTOOL_GSET;
1576
1577 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1578 c = blobmsg_open_array(b, "link-advertising");
1579 system_add_link_modes(b, ecmd.advertising);
1580 blobmsg_close_array(b, c);
1581
1582 c = blobmsg_open_array(b, "link-supported");
1583 system_add_link_modes(b, ecmd.supported);
1584 blobmsg_close_array(b, c);
1585
1586 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1587 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1588 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1589 blobmsg_add_string_buffer(b);
1590 }
1591
1592 close(dir_fd);
1593 return 0;
1594 }
1595
1596 int
1597 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1598 {
1599 const char *const counters[] = {
1600 "collisions", "rx_frame_errors", "tx_compressed",
1601 "multicast", "rx_length_errors", "tx_dropped",
1602 "rx_bytes", "rx_missed_errors", "tx_errors",
1603 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1604 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1605 "rx_dropped", "tx_aborted_errors", "tx_packets",
1606 "rx_errors", "tx_bytes", "tx_window_errors",
1607 "rx_fifo_errors", "tx_carrier_errors",
1608 };
1609 char buf[64];
1610 int stats_dir;
1611 int i;
1612 uint64_t val = 0;
1613
1614 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1615 stats_dir = open(buf, O_DIRECTORY);
1616 if (stats_dir < 0)
1617 return -1;
1618
1619 for (i = 0; i < ARRAY_SIZE(counters); i++)
1620 if (read_uint64_file(stats_dir, counters[i], &val))
1621 blobmsg_add_u64(b, counters[i], val);
1622
1623 close(stats_dir);
1624 return 0;
1625 }
1626
1627 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1628 {
1629 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1630 int alen = v4 ? 4 : 16;
1631 unsigned int flags = 0;
1632 struct ifaddrmsg ifa = {
1633 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1634 .ifa_prefixlen = addr->mask,
1635 .ifa_index = dev->ifindex,
1636 };
1637
1638 struct nl_msg *msg;
1639 if (cmd == RTM_NEWADDR)
1640 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1641
1642 msg = nlmsg_alloc_simple(cmd, flags);
1643 if (!msg)
1644 return -1;
1645
1646 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1647 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1648 if (v4) {
1649 if (addr->broadcast)
1650 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1651 if (addr->point_to_point)
1652 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1653 } else {
1654 time_t now = system_get_rtime();
1655 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1656
1657 if (addr->preferred_until) {
1658 int64_t preferred = addr->preferred_until - now;
1659 if (preferred < 0)
1660 preferred = 0;
1661 else if (preferred > UINT32_MAX)
1662 preferred = UINT32_MAX;
1663
1664 cinfo.ifa_prefered = preferred;
1665 }
1666
1667 if (addr->valid_until) {
1668 int64_t valid = addr->valid_until - now;
1669 if (valid <= 0) {
1670 nlmsg_free(msg);
1671 return -1;
1672 }
1673 else if (valid > UINT32_MAX)
1674 valid = UINT32_MAX;
1675
1676 cinfo.ifa_valid = valid;
1677 }
1678
1679 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1680
1681 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1682 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1683 }
1684
1685 return system_rtnl_call(msg);
1686 }
1687
1688 int system_add_address(struct device *dev, struct device_addr *addr)
1689 {
1690 return system_addr(dev, addr, RTM_NEWADDR);
1691 }
1692
1693 int system_del_address(struct device *dev, struct device_addr *addr)
1694 {
1695 return system_addr(dev, addr, RTM_DELADDR);
1696 }
1697
1698 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1699 {
1700 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1701 bool have_gw;
1702 unsigned int flags = 0;
1703
1704 if (alen == 4)
1705 have_gw = !!route->nexthop.in.s_addr;
1706 else
1707 have_gw = route->nexthop.in6.s6_addr32[0] ||
1708 route->nexthop.in6.s6_addr32[1] ||
1709 route->nexthop.in6.s6_addr32[2] ||
1710 route->nexthop.in6.s6_addr32[3];
1711
1712 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1713 ? route->table : RT_TABLE_MAIN;
1714
1715 struct rtmsg rtm = {
1716 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1717 .rtm_dst_len = route->mask,
1718 .rtm_src_len = route->sourcemask,
1719 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1720 .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC,
1721 .rtm_scope = RT_SCOPE_NOWHERE,
1722 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1723 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1724 };
1725 struct nl_msg *msg;
1726
1727 if (cmd == RTM_NEWROUTE) {
1728 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1729
1730 if (!dev) { // Add null-route
1731 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1732 rtm.rtm_type = RTN_UNREACHABLE;
1733 }
1734 else
1735 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1736 }
1737
1738 if (route->flags & DEVROUTE_TYPE) {
1739 rtm.rtm_type = route->type;
1740 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1741 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1742 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1743 rtm.rtm_table = RT_TABLE_LOCAL;
1744 }
1745
1746 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1747 rtm.rtm_scope = RT_SCOPE_HOST;
1748 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1749 rtm.rtm_type == RTN_ANYCAST) {
1750 rtm.rtm_scope = RT_SCOPE_LINK;
1751 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1752 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1753 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1754 dev = NULL;
1755 }
1756 }
1757
1758 msg = nlmsg_alloc_simple(cmd, flags);
1759 if (!msg)
1760 return -1;
1761
1762 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1763
1764 if (route->mask)
1765 nla_put(msg, RTA_DST, alen, &route->addr);
1766
1767 if (route->sourcemask) {
1768 if (rtm.rtm_family == AF_INET)
1769 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1770 else
1771 nla_put(msg, RTA_SRC, alen, &route->source);
1772 }
1773
1774 if (route->metric > 0)
1775 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1776
1777 if (have_gw)
1778 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1779
1780 if (dev)
1781 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1782
1783 if (table >= 256)
1784 nla_put_u32(msg, RTA_TABLE, table);
1785
1786 if (route->flags & DEVROUTE_MTU) {
1787 struct nlattr *metrics;
1788
1789 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1790 goto nla_put_failure;
1791
1792 nla_put_u32(msg, RTAX_MTU, route->mtu);
1793
1794 nla_nest_end(msg, metrics);
1795 }
1796
1797 return system_rtnl_call(msg);
1798
1799 nla_put_failure:
1800 nlmsg_free(msg);
1801 return -ENOMEM;
1802 }
1803
1804 int system_add_route(struct device *dev, struct device_route *route)
1805 {
1806 return system_rt(dev, route, RTM_NEWROUTE);
1807 }
1808
1809 int system_del_route(struct device *dev, struct device_route *route)
1810 {
1811 return system_rt(dev, route, RTM_DELROUTE);
1812 }
1813
1814 int system_flush_routes(void)
1815 {
1816 const char *names[] = {
1817 "/proc/sys/net/ipv4/route/flush",
1818 "/proc/sys/net/ipv6/route/flush"
1819 };
1820 int fd, i;
1821
1822 for (i = 0; i < ARRAY_SIZE(names); i++) {
1823 fd = open(names[i], O_WRONLY);
1824 if (fd < 0)
1825 continue;
1826
1827 if (write(fd, "-1", 2)) {}
1828 close(fd);
1829 }
1830 return 0;
1831 }
1832
1833 bool system_resolve_rt_type(const char *type, unsigned int *id)
1834 {
1835 return system_rtn_aton(type, id);
1836 }
1837
1838 bool system_resolve_rt_table(const char *name, unsigned int *id)
1839 {
1840 FILE *f;
1841 char *e, buf[128];
1842 unsigned int n, table = RT_TABLE_UNSPEC;
1843
1844 /* first try to parse table as number */
1845 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
1846 table = n;
1847
1848 /* handle well known aliases */
1849 else if (!strcmp(name, "default"))
1850 table = RT_TABLE_DEFAULT;
1851 else if (!strcmp(name, "main"))
1852 table = RT_TABLE_MAIN;
1853 else if (!strcmp(name, "local"))
1854 table = RT_TABLE_LOCAL;
1855
1856 /* try to look up name in /etc/iproute2/rt_tables */
1857 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
1858 {
1859 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
1860 {
1861 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
1862 continue;
1863
1864 n = strtoul(e, NULL, 10);
1865 e = strtok(NULL, " \t\n");
1866
1867 if (e && !strcmp(e, name))
1868 {
1869 table = n;
1870 break;
1871 }
1872 }
1873
1874 fclose(f);
1875 }
1876
1877 if (table == RT_TABLE_UNSPEC)
1878 return false;
1879
1880 *id = table;
1881 return true;
1882 }
1883
1884 bool system_is_default_rt_table(unsigned int id)
1885 {
1886 return (id == RT_TABLE_MAIN);
1887 }
1888
1889 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
1890 {
1891 char *e;
1892 unsigned int n;
1893
1894 if (!strcmp(filter, "strict"))
1895 n = 1;
1896 else if (!strcmp(filter, "loose"))
1897 n = 2;
1898 else {
1899 n = strtoul(filter, &e, 0);
1900 if (*e || e == filter || n > 2)
1901 return false;
1902 }
1903
1904 *id = n;
1905 return true;
1906 }
1907
1908 static int system_iprule(struct iprule *rule, int cmd)
1909 {
1910 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
1911
1912 struct nl_msg *msg;
1913 struct rtmsg rtm = {
1914 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1915 .rtm_protocol = RTPROT_STATIC,
1916 .rtm_scope = RT_SCOPE_UNIVERSE,
1917 .rtm_table = RT_TABLE_UNSPEC,
1918 .rtm_type = RTN_UNSPEC,
1919 .rtm_flags = 0,
1920 };
1921
1922 if (cmd == RTM_NEWRULE)
1923 rtm.rtm_type = RTN_UNICAST;
1924
1925 if (rule->invert)
1926 rtm.rtm_flags |= FIB_RULE_INVERT;
1927
1928 if (rule->flags & IPRULE_SRC)
1929 rtm.rtm_src_len = rule->src_mask;
1930
1931 if (rule->flags & IPRULE_DEST)
1932 rtm.rtm_dst_len = rule->dest_mask;
1933
1934 if (rule->flags & IPRULE_TOS)
1935 rtm.rtm_tos = rule->tos;
1936
1937 if (rule->flags & IPRULE_LOOKUP) {
1938 if (rule->lookup < 256)
1939 rtm.rtm_table = rule->lookup;
1940 }
1941
1942 if (rule->flags & IPRULE_ACTION)
1943 rtm.rtm_type = rule->action;
1944 else if (rule->flags & IPRULE_GOTO)
1945 rtm.rtm_type = FR_ACT_GOTO;
1946 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
1947 rtm.rtm_type = FR_ACT_NOP;
1948
1949 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
1950
1951 if (!msg)
1952 return -1;
1953
1954 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1955
1956 if (rule->flags & IPRULE_IN)
1957 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
1958
1959 if (rule->flags & IPRULE_OUT)
1960 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
1961
1962 if (rule->flags & IPRULE_SRC)
1963 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
1964
1965 if (rule->flags & IPRULE_DEST)
1966 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
1967
1968 if (rule->flags & IPRULE_PRIORITY)
1969 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
1970 else if (cmd == RTM_NEWRULE)
1971 nla_put_u32(msg, FRA_PRIORITY, rule->order);
1972
1973 if (rule->flags & IPRULE_FWMARK)
1974 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
1975
1976 if (rule->flags & IPRULE_FWMASK)
1977 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
1978
1979 if (rule->flags & IPRULE_LOOKUP) {
1980 if (rule->lookup >= 256)
1981 nla_put_u32(msg, FRA_TABLE, rule->lookup);
1982 }
1983
1984 if (rule->flags & IPRULE_GOTO)
1985 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
1986
1987 return system_rtnl_call(msg);
1988 }
1989
1990 int system_add_iprule(struct iprule *rule)
1991 {
1992 return system_iprule(rule, RTM_NEWRULE);
1993 }
1994
1995 int system_del_iprule(struct iprule *rule)
1996 {
1997 return system_iprule(rule, RTM_DELRULE);
1998 }
1999
2000 int system_flush_iprules(void)
2001 {
2002 int rv = 0;
2003 struct iprule rule;
2004
2005 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2006 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2007
2008 memset(&rule, 0, sizeof(rule));
2009
2010
2011 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2012
2013 rule.priority = 0;
2014 rule.lookup = RT_TABLE_LOCAL;
2015 rv |= system_iprule(&rule, RTM_NEWRULE);
2016
2017 rule.priority = 32766;
2018 rule.lookup = RT_TABLE_MAIN;
2019 rv |= system_iprule(&rule, RTM_NEWRULE);
2020
2021 rule.priority = 32767;
2022 rule.lookup = RT_TABLE_DEFAULT;
2023 rv |= system_iprule(&rule, RTM_NEWRULE);
2024
2025
2026 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2027
2028 rule.priority = 0;
2029 rule.lookup = RT_TABLE_LOCAL;
2030 rv |= system_iprule(&rule, RTM_NEWRULE);
2031
2032 rule.priority = 32766;
2033 rule.lookup = RT_TABLE_MAIN;
2034 rv |= system_iprule(&rule, RTM_NEWRULE);
2035
2036 return rv;
2037 }
2038
2039 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2040 {
2041 return system_rtn_aton(action, id);
2042 }
2043
2044 time_t system_get_rtime(void)
2045 {
2046 struct timespec ts;
2047 struct timeval tv;
2048
2049 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2050 return ts.tv_sec;
2051
2052 if (gettimeofday(&tv, NULL) == 0)
2053 return tv.tv_sec;
2054
2055 return 0;
2056 }
2057
2058 #ifndef IP_DF
2059 #define IP_DF 0x4000
2060 #endif
2061
2062 static int tunnel_ioctl(const char *name, int cmd, void *p)
2063 {
2064 struct ifreq ifr;
2065
2066 memset(&ifr, 0, sizeof(ifr));
2067 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2068 ifr.ifr_ifru.ifru_data = p;
2069 return ioctl(sock_ioctl, cmd, &ifr);
2070 }
2071
2072 #ifdef IFLA_IPTUN_MAX
2073 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2074 static int system_add_gre_tunnel(const char *name, const char *kind,
2075 const unsigned int link, struct blob_attr **tb, bool v6)
2076 {
2077 struct nl_msg *nlm;
2078 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2079 struct blob_attr *cur;
2080 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2081 uint16_t iflags = 0, oflags = 0;
2082 uint8_t tos = 0;
2083 int ret = 0, ttl = 64;
2084
2085 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2086 if (!nlm)
2087 return -1;
2088
2089 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2090 nla_put_string(nlm, IFLA_IFNAME, name);
2091
2092 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2093 if (!linkinfo) {
2094 ret = -ENOMEM;
2095 goto failure;
2096 }
2097
2098 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2099 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2100 if (!infodata) {
2101 ret = -ENOMEM;
2102 goto failure;
2103 }
2104
2105 if (link)
2106 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2107
2108 if ((cur = tb[TUNNEL_ATTR_TTL]))
2109 ttl = blobmsg_get_u32(cur);
2110
2111 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2112
2113 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2114 char *str = blobmsg_get_string(cur);
2115 if (strcmp(str, "inherit")) {
2116 unsigned uval;
2117
2118 if (!system_tos_aton(str, &uval)) {
2119 ret = -EINVAL;
2120 goto failure;
2121 }
2122
2123 if (v6)
2124 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2125 else
2126 tos = uval;
2127 } else {
2128 if (v6)
2129 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2130 else
2131 tos = 1;
2132 }
2133 }
2134
2135 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2136 uint8_t icsum, ocsum, iseqno, oseqno;
2137 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2138 &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2139 ret = -EINVAL;
2140 goto failure;
2141 }
2142
2143 if (ikey)
2144 iflags |= GRE_KEY;
2145
2146 if (okey)
2147 oflags |= GRE_KEY;
2148
2149 if (icsum)
2150 iflags |= GRE_CSUM;
2151
2152 if (ocsum)
2153 oflags |= GRE_CSUM;
2154
2155 if (iseqno)
2156 iflags |= GRE_SEQ;
2157
2158 if (oseqno)
2159 oflags |= GRE_SEQ;
2160 }
2161
2162 if (v6) {
2163 struct in6_addr in6buf;
2164 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2165 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2166 ret = -EINVAL;
2167 goto failure;
2168 }
2169 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2170 }
2171
2172 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2173 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2174 ret = -EINVAL;
2175 goto failure;
2176 }
2177 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2178 }
2179 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2180
2181 if (flowinfo)
2182 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2183
2184 if (flags)
2185 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2186 } else {
2187 struct in_addr inbuf;
2188 bool set_df = true;
2189
2190 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2191 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2192 ret = -EINVAL;
2193 goto failure;
2194 }
2195 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2196 }
2197
2198 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2199 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2200 ret = -EINVAL;
2201 goto failure;
2202 }
2203 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2204
2205 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2206 if (!okey) {
2207 okey = inbuf.s_addr;
2208 oflags |= GRE_KEY;
2209 }
2210
2211 if (!ikey) {
2212 ikey = inbuf.s_addr;
2213 iflags |= GRE_KEY;
2214 }
2215 }
2216 }
2217
2218 if ((cur = tb[TUNNEL_ATTR_DF]))
2219 set_df = blobmsg_get_bool(cur);
2220
2221 /* ttl !=0 and nopmtudisc are incompatible */
2222 if (ttl && !set_df) {
2223 ret = -EINVAL;
2224 goto failure;
2225 }
2226
2227 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2228
2229 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2230 }
2231
2232 if (oflags)
2233 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2234
2235 if (iflags)
2236 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2237
2238 if (okey)
2239 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2240
2241 if (ikey)
2242 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2243
2244 nla_nest_end(nlm, infodata);
2245 nla_nest_end(nlm, linkinfo);
2246
2247 return system_rtnl_call(nlm);
2248
2249 failure:
2250 nlmsg_free(nlm);
2251 return ret;
2252 }
2253 #endif
2254
2255 #ifdef IFLA_VTI_MAX
2256 static int system_add_vti_tunnel(const char *name, const char *kind,
2257 const unsigned int link, struct blob_attr **tb, bool v6)
2258 {
2259 struct nl_msg *nlm;
2260 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2261 struct blob_attr *cur;
2262 uint32_t ikey = 0, okey = 0;
2263 int ret = 0;
2264
2265 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2266 if (!nlm)
2267 return -1;
2268
2269 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2270 nla_put_string(nlm, IFLA_IFNAME, name);
2271
2272 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2273 if (!linkinfo) {
2274 ret = -ENOMEM;
2275 goto failure;
2276 }
2277
2278 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2279 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2280 if (!infodata) {
2281 ret = -ENOMEM;
2282 goto failure;
2283 }
2284
2285 if (link)
2286 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2287
2288 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2289 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2290 &ikey, &okey) < 2) {
2291 ret = -EINVAL;
2292 goto failure;
2293 }
2294 }
2295
2296 if (v6) {
2297 struct in6_addr in6buf;
2298 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2299 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2300 ret = -EINVAL;
2301 goto failure;
2302 }
2303 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2304 }
2305
2306 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2307 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2308 ret = -EINVAL;
2309 goto failure;
2310 }
2311 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2312 }
2313
2314 } else {
2315 struct in_addr inbuf;
2316
2317 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2318 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2319 ret = -EINVAL;
2320 goto failure;
2321 }
2322 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2323 }
2324
2325 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2326 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2327 ret = -EINVAL;
2328 goto failure;
2329 }
2330 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2331 }
2332
2333 }
2334
2335 if (okey)
2336 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2337
2338 if (ikey)
2339 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2340
2341 nla_nest_end(nlm, infodata);
2342 nla_nest_end(nlm, linkinfo);
2343
2344 return system_rtnl_call(nlm);
2345
2346 failure:
2347 nlmsg_free(nlm);
2348 return ret;
2349 }
2350 #endif
2351
2352 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2353 {
2354 struct blob_attr *cur;
2355 bool set_df = true;
2356 struct ip_tunnel_parm p = {
2357 .link = link,
2358 .iph = {
2359 .version = 4,
2360 .ihl = 5,
2361 .protocol = proto,
2362 }
2363 };
2364
2365 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2366 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2367 return -EINVAL;
2368
2369 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2370 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2371 return -EINVAL;
2372
2373 if ((cur = tb[TUNNEL_ATTR_DF]))
2374 set_df = blobmsg_get_bool(cur);
2375
2376 if ((cur = tb[TUNNEL_ATTR_TTL]))
2377 p.iph.ttl = blobmsg_get_u32(cur);
2378
2379 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2380 char *str = blobmsg_get_string(cur);
2381 if (strcmp(str, "inherit")) {
2382 unsigned uval;
2383
2384 if (!system_tos_aton(str, &uval))
2385 return -EINVAL;
2386
2387 p.iph.tos = uval;
2388 } else
2389 p.iph.tos = 1;
2390 }
2391
2392 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2393 /* ttl !=0 and nopmtudisc are incompatible */
2394 if (p.iph.ttl && p.iph.frag_off == 0)
2395 return -EINVAL;
2396
2397 strncpy(p.name, name, sizeof(p.name));
2398
2399 switch (p.iph.protocol) {
2400 case IPPROTO_IPIP:
2401 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2402 case IPPROTO_IPV6:
2403 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2404 default:
2405 break;
2406 }
2407 return -1;
2408 }
2409
2410 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2411 {
2412 struct blob_attr *cur;
2413 const char *str;
2414
2415 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2416 return -EINVAL;
2417 str = blobmsg_data(cur);
2418
2419 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2420 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2421 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6"))
2422 return system_link_del(name);
2423 else
2424 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2425 }
2426
2427 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2428 {
2429 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2430
2431 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2432 blob_data(attr), blob_len(attr));
2433
2434 return __system_del_ip_tunnel(name, tb);
2435 }
2436
2437 int system_update_ipv6_mtu(struct device *dev, int mtu)
2438 {
2439 int ret = -1;
2440 char buf[64];
2441 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2442 dev->ifname);
2443
2444 int fd = open(buf, O_RDWR);
2445
2446 if (!mtu) {
2447 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2448 if (len < 0)
2449 goto out;
2450
2451 buf[len] = 0;
2452 ret = atoi(buf);
2453 } else {
2454 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2455 ret = mtu;
2456 }
2457
2458 out:
2459 close(fd);
2460 return ret;
2461 }
2462
2463 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2464 {
2465 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2466 struct blob_attr *cur;
2467 const char *str;
2468
2469 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2470 blob_data(attr), blob_len(attr));
2471
2472 __system_del_ip_tunnel(name, tb);
2473
2474 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2475 return -EINVAL;
2476 str = blobmsg_data(cur);
2477
2478 unsigned int ttl = 0;
2479 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2480 ttl = blobmsg_get_u32(cur);
2481 if (ttl > 255)
2482 return -EINVAL;
2483 }
2484
2485 unsigned int link = 0;
2486 if ((cur = tb[TUNNEL_ATTR_LINK])) {
2487 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2488 if (!iface)
2489 return -EINVAL;
2490
2491 if (iface->l3_dev.dev)
2492 link = iface->l3_dev.dev->ifindex;
2493 }
2494
2495 if (!strcmp(str, "sit")) {
2496 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2497 return -1;
2498
2499 #ifdef SIOCADD6RD
2500 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2501 unsigned int mask;
2502 struct ip_tunnel_6rd p6;
2503
2504 memset(&p6, 0, sizeof(p6));
2505
2506 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2507 &p6.prefix, &mask) || mask > 128)
2508 return -EINVAL;
2509 p6.prefixlen = mask;
2510
2511 if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2512 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2513 &p6.relay_prefix, &mask) || mask > 32)
2514 return -EINVAL;
2515 p6.relay_prefixlen = mask;
2516 }
2517
2518 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2519 __system_del_ip_tunnel(name, tb);
2520 return -1;
2521 }
2522 }
2523 #endif
2524 #ifdef IFLA_IPTUN_MAX
2525 } else if (!strcmp(str, "ipip6")) {
2526 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2527 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2528 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2529 int ret = 0;
2530
2531 if (!nlm)
2532 return -1;
2533
2534 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2535 nla_put_string(nlm, IFLA_IFNAME, name);
2536
2537 if (link)
2538 nla_put_u32(nlm, IFLA_LINK, link);
2539
2540 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2541 if (!linkinfo) {
2542 ret = -ENOMEM;
2543 goto failure;
2544 }
2545 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2546 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2547 if (!infodata) {
2548 ret = -ENOMEM;
2549 goto failure;
2550 }
2551
2552 if (link)
2553 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2554
2555 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2556 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2557 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2558
2559 struct in6_addr in6buf;
2560 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2561 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2562 ret = -EINVAL;
2563 goto failure;
2564 }
2565 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2566 }
2567
2568 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2569 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2570 ret = -EINVAL;
2571 goto failure;
2572 }
2573 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2574 }
2575
2576 #ifdef IFLA_IPTUN_FMR_MAX
2577 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2578 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2579
2580 struct blob_attr *fmr;
2581 unsigned rem, fmrcnt = 0;
2582 blobmsg_for_each_attr(fmr, cur, rem) {
2583 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2584 continue;
2585
2586 unsigned ip4len, ip6len, ealen, offset = 6;
2587 char ip6buf[48];
2588 char ip4buf[16];
2589
2590 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2591 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2592 ret = -EINVAL;
2593 goto failure;
2594 }
2595
2596 struct in6_addr ip6prefix;
2597 struct in_addr ip4prefix;
2598 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2599 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2600 ret = -EINVAL;
2601 goto failure;
2602 }
2603
2604 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2605
2606 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2607 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2608 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2609 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2610 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2611 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2612
2613 nla_nest_end(nlm, rule);
2614 }
2615
2616 nla_nest_end(nlm, fmrs);
2617 }
2618 #endif
2619
2620 nla_nest_end(nlm, infodata);
2621 nla_nest_end(nlm, linkinfo);
2622
2623 return system_rtnl_call(nlm);
2624 failure:
2625 nlmsg_free(nlm);
2626 return ret;
2627 } else if (!strcmp(str, "greip")) {
2628 return system_add_gre_tunnel(name, "gre", link, tb, false);
2629 } else if (!strcmp(str, "gretapip")) {
2630 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2631 } else if (!strcmp(str, "greip6")) {
2632 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2633 } else if (!strcmp(str, "gretapip6")) {
2634 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2635 #ifdef IFLA_VTI_MAX
2636 } else if (!strcmp(str, "vtiip")) {
2637 return system_add_vti_tunnel(name, "vti", link, tb, false);
2638 } else if (!strcmp(str, "vtiip6")) {
2639 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2640 #endif
2641 #endif
2642 } else if (!strcmp(str, "ipip")) {
2643 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2644 }
2645 else
2646 return -EINVAL;
2647
2648 return 0;
2649 }
OpenWrt Network interface configuration daemon