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76380867f05813989533553bee9a87b40428509e
[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 RT_TABLE_PRELOCAL
48 #define RT_TABLE_PRELOCAL 128
49 #endif
50
51 #ifndef IFA_F_NOPREFIXROUTE
52 #define IFA_F_NOPREFIXROUTE 0x200
53 #endif
54
55 #ifndef IFA_FLAGS
56 #define IFA_FLAGS (IFA_MULTICAST + 1)
57 #endif
58
59
60 #include <string.h>
61 #include <fcntl.h>
62 #include <glob.h>
63 #include <time.h>
64 #include <unistd.h>
65
66 #include <netlink/msg.h>
67 #include <netlink/attr.h>
68 #include <netlink/socket.h>
69 #include <libubox/uloop.h>
70
71 #include "netifd.h"
72 #include "device.h"
73 #include "system.h"
74
75 struct event_socket {
76 struct uloop_fd uloop;
77 struct nl_sock *sock;
78 int bufsize;
79 };
80
81 static int sock_ioctl = -1;
82 static struct nl_sock *sock_rtnl = NULL;
83
84 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
85 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
86
87 static char dev_buf[256];
88
89 static void
90 handler_nl_event(struct uloop_fd *u, unsigned int events)
91 {
92 struct event_socket *ev = container_of(u, struct event_socket, uloop);
93 int err;
94 socklen_t errlen = sizeof(err);
95
96 if (!u->error) {
97 nl_recvmsgs_default(ev->sock);
98 return;
99 }
100
101 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
102 goto abort;
103
104 switch(err) {
105 case ENOBUFS:
106 // Increase rx buffer size on netlink socket
107 ev->bufsize *= 2;
108 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
109 goto abort;
110
111 // Request full dump since some info got dropped
112 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
113 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
114 break;
115
116 default:
117 goto abort;
118 }
119 u->error = false;
120 return;
121
122 abort:
123 uloop_fd_delete(&ev->uloop);
124 return;
125 }
126
127 static struct nl_sock *
128 create_socket(int protocol, int groups)
129 {
130 struct nl_sock *sock;
131
132 sock = nl_socket_alloc();
133 if (!sock)
134 return NULL;
135
136 if (groups)
137 nl_join_groups(sock, groups);
138
139 if (nl_connect(sock, protocol))
140 return NULL;
141
142 return sock;
143 }
144
145 static bool
146 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
147 uloop_fd_handler cb, int flags)
148 {
149 ev->sock = create_socket(protocol, groups);
150 if (!ev->sock)
151 return false;
152
153 ev->uloop.fd = nl_socket_get_fd(ev->sock);
154 ev->uloop.cb = cb;
155 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
156 return false;
157
158 return true;
159 }
160
161 static bool
162 create_event_socket(struct event_socket *ev, int protocol,
163 int (*cb)(struct nl_msg *msg, void *arg))
164 {
165 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
166 return false;
167
168 // Install the valid custom callback handler
169 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
170
171 // Disable sequence number checking on event sockets
172 nl_socket_disable_seq_check(ev->sock);
173
174 // Increase rx buffer size to 65K on event sockets
175 ev->bufsize = 65535;
176 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
177 return false;
178
179 return true;
180 }
181
182 static bool
183 system_rtn_aton(const char *src, unsigned int *dst)
184 {
185 char *e;
186 unsigned int n;
187
188 if (!strcmp(src, "local"))
189 n = RTN_LOCAL;
190 else if (!strcmp(src, "nat"))
191 n = RTN_NAT;
192 else if (!strcmp(src, "broadcast"))
193 n = RTN_BROADCAST;
194 else if (!strcmp(src, "anycast"))
195 n = RTN_ANYCAST;
196 else if (!strcmp(src, "multicast"))
197 n = RTN_MULTICAST;
198 else if (!strcmp(src, "prohibit"))
199 n = RTN_PROHIBIT;
200 else if (!strcmp(src, "unreachable"))
201 n = RTN_UNREACHABLE;
202 else if (!strcmp(src, "blackhole"))
203 n = RTN_BLACKHOLE;
204 else if (!strcmp(src, "xresolve"))
205 n = RTN_XRESOLVE;
206 else if (!strcmp(src, "unicast"))
207 n = RTN_UNICAST;
208 else if (!strcmp(src, "throw"))
209 n = RTN_THROW;
210 else if (!strcmp(src, "failed_policy"))
211 n = RTN_FAILED_POLICY;
212 else {
213 n = strtoul(src, &e, 0);
214 if (!e || *e || e == src || n > 255)
215 return false;
216 }
217
218 *dst = n;
219 return true;
220 }
221
222 static bool
223 system_tos_aton(const char *src, unsigned *dst)
224 {
225 char *e;
226
227 *dst = strtoul(src, &e, 16);
228 if (e == src || *e || *dst > 255)
229 return false;
230
231 return true;
232 }
233
234 int system_init(void)
235 {
236 static struct event_socket rtnl_event;
237 static struct event_socket hotplug_event;
238
239 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
240 system_fd_set_cloexec(sock_ioctl);
241
242 // Prepare socket for routing / address control
243 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
244 if (!sock_rtnl)
245 return -1;
246
247 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
248 return -1;
249
250 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
251 handle_hotplug_event, 0))
252 return -1;
253
254 // Receive network link events form kernel
255 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
256
257 return 0;
258 }
259
260 static void system_set_sysctl(const char *path, const char *val)
261 {
262 int fd;
263
264 fd = open(path, O_WRONLY);
265 if (fd < 0)
266 return;
267
268 if (write(fd, val, strlen(val))) {}
269 close(fd);
270 }
271
272 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
273 {
274 snprintf(dev_buf, sizeof(dev_buf), path, device);
275 system_set_sysctl(dev_buf, val);
276 }
277
278 static void system_set_disable_ipv6(struct device *dev, const char *val)
279 {
280 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
281 }
282
283 static void system_set_rpfilter(struct device *dev, const char *val)
284 {
285 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
286 }
287
288 static void system_set_acceptlocal(struct device *dev, const char *val)
289 {
290 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
291 }
292
293 static void system_set_igmpversion(struct device *dev, const char *val)
294 {
295 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
296 }
297
298 static void system_set_mldversion(struct device *dev, const char *val)
299 {
300 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
301 }
302
303 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
304 {
305 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
306 }
307
308 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
309 {
310 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
311 }
312
313 static void system_set_dadtransmits(struct device *dev, const char *val)
314 {
315 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
316 }
317
318 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
319 {
320 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
321 }
322
323 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
324 {
325 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
326 }
327
328 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
329 {
330 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
331 "/sys/class/net/%s/brport/multicast_router",
332 dev->ifname, val);
333 }
334
335 static void system_bridge_set_robustness(struct device *dev, const char *val)
336 {
337 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
338 dev->ifname, val);
339 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
340 dev->ifname, val);
341 }
342
343 static void system_bridge_set_query_interval(struct device *dev, const char *val)
344 {
345 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
346 dev->ifname, val);
347 }
348
349 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
350 {
351 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
352 dev->ifname, val);
353 }
354
355 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
356 {
357 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
358 dev->ifname, val);
359 }
360
361 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
362 {
363 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
364 dev->ifname, val);
365 }
366
367 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
368 {
369 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
370 dev->ifname, val);
371 }
372
373 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
374 {
375 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
376 dev->ifname, val);
377 }
378
379 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
380 {
381 int fd = -1, ret = -1;
382
383 fd = open(path, O_RDONLY);
384 if (fd < 0)
385 goto out;
386
387 ssize_t len = read(fd, buf, buf_sz - 1);
388 if (len < 0)
389 goto out;
390
391 ret = buf[len] = 0;
392
393 out:
394 if (fd >= 0)
395 close(fd);
396
397 return ret;
398 }
399
400 static int
401 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
402 {
403 snprintf(dev_buf, sizeof(dev_buf), path, device);
404 return system_get_sysctl(dev_buf, buf, buf_sz);
405 }
406
407 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
408 {
409 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
410 dev->ifname, buf, buf_sz);
411 }
412
413 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
414 {
415 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
416 dev->ifname, buf, buf_sz);
417 }
418
419 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
420 {
421 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
422 dev->ifname, buf, buf_sz);
423 }
424
425 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
426 {
427 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
428 dev->ifname, buf, buf_sz);
429 }
430
431 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
432 {
433 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
434 dev->ifname, buf, buf_sz);
435 }
436
437 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
438 {
439 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
440 dev->ifname, buf, buf_sz);
441 }
442
443 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
444 {
445 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
446 dev->ifname, buf, buf_sz);
447 }
448
449 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
450 {
451 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
452 dev->ifname, buf, buf_sz);
453 }
454
455 // Evaluate netlink messages
456 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
457 {
458 struct nlmsghdr *nh = nlmsg_hdr(msg);
459 struct nlattr *nla[__IFLA_MAX];
460 int link_state = 0;
461 char buf[10];
462
463 if (nh->nlmsg_type != RTM_NEWLINK)
464 goto out;
465
466 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
467 if (!nla[IFLA_IFNAME])
468 goto out;
469
470 struct device *dev = device_get(nla_data(nla[IFLA_IFNAME]), false);
471 if (!dev)
472 goto out;
473
474 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
475 link_state = strtoul(buf, NULL, 0);
476
477 device_set_link(dev, link_state ? true : false);
478
479 out:
480 return 0;
481 }
482
483 static void
484 handle_hotplug_msg(char *data, int size)
485 {
486 const char *subsystem = NULL, *interface = NULL;
487 char *cur, *end, *sep;
488 struct device *dev;
489 int skip;
490 bool add;
491
492 if (!strncmp(data, "add@", 4))
493 add = true;
494 else if (!strncmp(data, "remove@", 7))
495 add = false;
496 else
497 return;
498
499 skip = strlen(data) + 1;
500 end = data + size;
501
502 for (cur = data + skip; cur < end; cur += skip) {
503 skip = strlen(cur) + 1;
504
505 sep = strchr(cur, '=');
506 if (!sep)
507 continue;
508
509 *sep = 0;
510 if (!strcmp(cur, "INTERFACE"))
511 interface = sep + 1;
512 else if (!strcmp(cur, "SUBSYSTEM")) {
513 subsystem = sep + 1;
514 if (strcmp(subsystem, "net") != 0)
515 return;
516 }
517 if (subsystem && interface)
518 goto found;
519 }
520 return;
521
522 found:
523 dev = device_get(interface, false);
524 if (!dev)
525 return;
526
527 if (dev->type != &simple_device_type)
528 return;
529
530 if (add && system_if_force_external(dev->ifname))
531 return;
532
533 device_set_present(dev, add);
534 }
535
536 static void
537 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
538 {
539 struct event_socket *ev = container_of(u, struct event_socket, uloop);
540 struct sockaddr_nl nla;
541 unsigned char *buf = NULL;
542 int size;
543
544 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
545 if (nla.nl_pid == 0)
546 handle_hotplug_msg((char *) buf, size);
547
548 free(buf);
549 }
550 }
551
552 static int system_rtnl_call(struct nl_msg *msg)
553 {
554 int ret;
555
556 ret = nl_send_auto_complete(sock_rtnl, msg);
557 nlmsg_free(msg);
558
559 if (ret < 0)
560 return ret;
561
562 return nl_wait_for_ack(sock_rtnl);
563 }
564
565 int system_bridge_delbr(struct device *bridge)
566 {
567 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
568 }
569
570 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
571 {
572 struct ifreq ifr;
573
574 memset(&ifr, 0, sizeof(ifr));
575 if (dev)
576 ifr.ifr_ifindex = dev->ifindex;
577 else
578 ifr.ifr_data = data;
579 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
580 return ioctl(sock_ioctl, cmd, &ifr);
581 }
582
583 static bool system_is_bridge(const char *name, char *buf, int buflen)
584 {
585 struct stat st;
586
587 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
588 if (stat(buf, &st) < 0)
589 return false;
590
591 return true;
592 }
593
594 static char *system_get_bridge(const char *name, char *buf, int buflen)
595 {
596 char *path;
597 ssize_t len = -1;
598 glob_t gl;
599
600 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
601 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
602 return NULL;
603
604 if (gl.gl_pathc > 0)
605 len = readlink(gl.gl_pathv[0], buf, buflen);
606
607 globfree(&gl);
608
609 if (len < 0)
610 return NULL;
611
612 buf[len] = 0;
613 path = strrchr(buf, '/');
614 if (!path)
615 return NULL;
616
617 return path + 1;
618 }
619
620 static void
621 system_bridge_set_wireless(struct device *bridge, struct device *dev)
622 {
623 bool mcast_to_ucast = dev->wireless_ap;
624 bool hairpin = true;
625
626 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
627 !bridge->settings.multicast_to_unicast)
628 mcast_to_ucast = false;
629
630 if (!mcast_to_ucast || dev->wireless_isolate)
631 hairpin = false;
632
633 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
634 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
635 }
636
637 int system_bridge_addif(struct device *bridge, struct device *dev)
638 {
639 char buf[64];
640 char *oldbr;
641 int ret = 0;
642
643 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
644 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
645 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
646
647 if (dev->wireless)
648 system_bridge_set_wireless(bridge, dev);
649
650 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
651 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
652 system_bridge_set_multicast_router(dev, buf, false);
653 }
654
655 return ret;
656 }
657
658 int system_bridge_delif(struct device *bridge, struct device *dev)
659 {
660 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
661 }
662
663 int system_if_resolve(struct device *dev)
664 {
665 struct ifreq ifr;
666 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
667 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
668 return ifr.ifr_ifindex;
669 else
670 return 0;
671 }
672
673 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
674 {
675 struct ifreq ifr;
676
677 memset(&ifr, 0, sizeof(ifr));
678 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
679 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
680 ifr.ifr_flags |= add;
681 ifr.ifr_flags &= ~rem;
682 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
683 }
684
685 struct clear_data {
686 struct nl_msg *msg;
687 struct device *dev;
688 int type;
689 int size;
690 int af;
691 };
692
693
694 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
695 {
696 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
697
698 return ifa->ifa_index == ifindex;
699 }
700
701 static bool check_route(struct nlmsghdr *hdr, int ifindex)
702 {
703 struct rtmsg *r = NLMSG_DATA(hdr);
704 struct nlattr *tb[__RTA_MAX];
705
706 if (r->rtm_protocol == RTPROT_KERNEL &&
707 r->rtm_family == AF_INET6)
708 return false;
709
710 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
711 if (!tb[RTA_OIF])
712 return false;
713
714 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
715 }
716
717 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
718 {
719 return true;
720 }
721
722 static int cb_clear_event(struct nl_msg *msg, void *arg)
723 {
724 struct clear_data *clr = arg;
725 struct nlmsghdr *hdr = nlmsg_hdr(msg);
726 bool (*cb)(struct nlmsghdr *, int ifindex);
727 int type;
728
729 switch(clr->type) {
730 case RTM_GETADDR:
731 type = RTM_DELADDR;
732 if (hdr->nlmsg_type != RTM_NEWADDR)
733 return NL_SKIP;
734
735 cb = check_ifaddr;
736 break;
737 case RTM_GETROUTE:
738 type = RTM_DELROUTE;
739 if (hdr->nlmsg_type != RTM_NEWROUTE)
740 return NL_SKIP;
741
742 cb = check_route;
743 break;
744 case RTM_GETRULE:
745 type = RTM_DELRULE;
746 if (hdr->nlmsg_type != RTM_NEWRULE)
747 return NL_SKIP;
748
749 cb = check_rule;
750 break;
751 default:
752 return NL_SKIP;
753 }
754
755 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
756 return NL_SKIP;
757
758 if (type == RTM_DELRULE)
759 D(SYSTEM, "Remove a rule\n");
760 else
761 D(SYSTEM, "Remove %s from device %s\n",
762 type == RTM_DELADDR ? "an address" : "a route",
763 clr->dev->ifname);
764 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
765 hdr = nlmsg_hdr(clr->msg);
766 hdr->nlmsg_type = type;
767 hdr->nlmsg_flags = NLM_F_REQUEST;
768
769 nl_socket_disable_auto_ack(sock_rtnl);
770 nl_send_auto_complete(sock_rtnl, clr->msg);
771 nl_socket_enable_auto_ack(sock_rtnl);
772
773 return NL_SKIP;
774 }
775
776 static int
777 cb_finish_event(struct nl_msg *msg, void *arg)
778 {
779 int *pending = arg;
780 *pending = 0;
781 return NL_STOP;
782 }
783
784 static int
785 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
786 {
787 int *pending = arg;
788 *pending = err->error;
789 return NL_STOP;
790 }
791
792 static void
793 system_if_clear_entries(struct device *dev, int type, int af)
794 {
795 struct clear_data clr;
796 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
797 struct rtmsg rtm = {
798 .rtm_family = af,
799 .rtm_flags = RTM_F_CLONED,
800 };
801 int flags = NLM_F_DUMP;
802 int pending = 1;
803
804 clr.af = af;
805 clr.dev = dev;
806 clr.type = type;
807 switch (type) {
808 case RTM_GETADDR:
809 case RTM_GETRULE:
810 clr.size = sizeof(struct rtgenmsg);
811 break;
812 case RTM_GETROUTE:
813 clr.size = sizeof(struct rtmsg);
814 break;
815 default:
816 return;
817 }
818
819 if (!cb)
820 return;
821
822 clr.msg = nlmsg_alloc_simple(type, flags);
823 if (!clr.msg)
824 goto out;
825
826 nlmsg_append(clr.msg, &rtm, clr.size, 0);
827 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
828 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
829 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
830
831 nl_send_auto_complete(sock_rtnl, clr.msg);
832 while (pending > 0)
833 nl_recvmsgs(sock_rtnl, cb);
834
835 nlmsg_free(clr.msg);
836 out:
837 nl_cb_put(cb);
838 }
839
840 /*
841 * Clear bridge (membership) state and bring down device
842 */
843 void system_if_clear_state(struct device *dev)
844 {
845 static char buf[256];
846 char *bridge;
847
848 device_set_ifindex(dev, system_if_resolve(dev));
849 if (dev->external || !dev->ifindex)
850 return;
851
852 system_if_flags(dev->ifname, 0, IFF_UP);
853
854 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
855 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
856 system_bridge_delbr(dev);
857 return;
858 }
859
860 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
861 if (bridge) {
862 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
863 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
864 }
865
866 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
867 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
868 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
869 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
870 system_set_disable_ipv6(dev, "0");
871 }
872
873 static inline unsigned long
874 sec_to_jiffies(int val)
875 {
876 return (unsigned long) val * 100;
877 }
878
879 static void system_bridge_conf_multicast_deps(struct device *bridge,
880 struct bridge_config *cfg,
881 char *buf,
882 int buf_len)
883 {
884 int val;
885
886 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
887 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
888 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
889 val = cfg->robustness * cfg->query_interval +
890 cfg->query_response_interval;
891
892 snprintf(buf, buf_len, "%i", val);
893 system_bridge_set_membership_interval(bridge, buf);
894
895 val = cfg->robustness * cfg->query_interval +
896 cfg->query_response_interval / 2;
897
898 snprintf(buf, buf_len, "%i", val);
899 system_bridge_set_other_querier_timeout(bridge, buf);
900 }
901
902 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
903 val = cfg->query_interval / 4;
904
905 snprintf(buf, buf_len, "%i", val);
906 system_bridge_set_startup_query_interval(bridge, buf);
907 }
908 }
909
910 static void system_bridge_conf_multicast(struct device *bridge,
911 struct bridge_config *cfg,
912 char *buf,
913 int buf_len)
914 {
915 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
916 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
917
918 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
919 bridge->ifname, cfg->multicast_querier ? "1" : "0");
920
921 snprintf(buf, buf_len, "%i", cfg->hash_max);
922 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
923 bridge->ifname, buf);
924
925 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
926 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
927 system_bridge_set_multicast_router(bridge, buf, true);
928 }
929
930 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
931 snprintf(buf, buf_len, "%i", cfg->robustness);
932 system_bridge_set_robustness(bridge, buf);
933 }
934
935 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
936 snprintf(buf, buf_len, "%i", cfg->query_interval);
937 system_bridge_set_query_interval(bridge, buf);
938 }
939
940 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
941 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
942 system_bridge_set_query_response_interval(bridge, buf);
943 }
944
945 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
946 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
947 system_bridge_set_last_member_interval(bridge, buf);
948 }
949
950 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
951 }
952
953 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
954 {
955 char buf[64];
956 unsigned long args[4] = {};
957
958 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
959 return -1;
960
961 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
962 args[1] = !!cfg->stp;
963 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
964
965 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
966 args[1] = sec_to_jiffies(cfg->forward_delay);
967 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
968
969 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
970
971 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
972 args[1] = cfg->priority;
973 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
974
975 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
976 args[0] = BRCTL_SET_AGEING_TIME;
977 args[1] = sec_to_jiffies(cfg->ageing_time);
978 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
979 }
980
981 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
982 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
983 args[1] = sec_to_jiffies(cfg->hello_time);
984 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
985 }
986
987 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
988 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
989 args[1] = sec_to_jiffies(cfg->max_age);
990 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
991 }
992
993 return 0;
994 }
995
996 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
997 {
998 struct nl_msg *msg;
999 struct nlattr *linkinfo, *data;
1000 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1001 int i, rv;
1002 static const struct {
1003 const char *name;
1004 enum macvlan_mode val;
1005 } modes[] = {
1006 { "private", MACVLAN_MODE_PRIVATE },
1007 { "vepa", MACVLAN_MODE_VEPA },
1008 { "bridge", MACVLAN_MODE_BRIDGE },
1009 { "passthru", MACVLAN_MODE_PASSTHRU },
1010 };
1011
1012 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1013
1014 if (!msg)
1015 return -1;
1016
1017 nlmsg_append(msg, &iim, sizeof(iim), 0);
1018
1019 if (cfg->flags & MACVLAN_OPT_MACADDR)
1020 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1021 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1022 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1023
1024 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1025 goto nla_put_failure;
1026
1027 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1028
1029 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1030 goto nla_put_failure;
1031
1032 if (cfg->mode) {
1033 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1034 if (strcmp(cfg->mode, modes[i].name) != 0)
1035 continue;
1036
1037 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1038 break;
1039 }
1040 }
1041
1042 nla_nest_end(msg, data);
1043 nla_nest_end(msg, linkinfo);
1044
1045 rv = system_rtnl_call(msg);
1046 if (rv)
1047 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1048
1049 return rv;
1050
1051 nla_put_failure:
1052 nlmsg_free(msg);
1053 return -ENOMEM;
1054 }
1055
1056 static int system_link_del(const char *ifname)
1057 {
1058 struct nl_msg *msg;
1059 struct ifinfomsg iim = {
1060 .ifi_family = AF_UNSPEC,
1061 .ifi_index = 0,
1062 };
1063
1064 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1065
1066 if (!msg)
1067 return -1;
1068
1069 nlmsg_append(msg, &iim, sizeof(iim), 0);
1070 nla_put_string(msg, IFLA_IFNAME, ifname);
1071 return system_rtnl_call(msg);
1072 }
1073
1074 int system_macvlan_del(struct device *macvlan)
1075 {
1076 return system_link_del(macvlan->ifname);
1077 }
1078
1079 static int system_vlan(struct device *dev, int id)
1080 {
1081 struct vlan_ioctl_args ifr = {
1082 .cmd = SET_VLAN_NAME_TYPE_CMD,
1083 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1084 };
1085
1086 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1087
1088 if (id < 0) {
1089 ifr.cmd = DEL_VLAN_CMD;
1090 ifr.u.VID = 0;
1091 } else {
1092 ifr.cmd = ADD_VLAN_CMD;
1093 ifr.u.VID = id;
1094 }
1095 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1096 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1097 }
1098
1099 int system_vlan_add(struct device *dev, int id)
1100 {
1101 return system_vlan(dev, id);
1102 }
1103
1104 int system_vlan_del(struct device *dev)
1105 {
1106 return system_vlan(dev, -1);
1107 }
1108
1109 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1110 {
1111 struct nl_msg *msg;
1112 struct nlattr *linkinfo, *data;
1113 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1114 int rv;
1115
1116 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1117
1118 if (!msg)
1119 return -1;
1120
1121 nlmsg_append(msg, &iim, sizeof(iim), 0);
1122 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1123 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1124
1125 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1126 goto nla_put_failure;
1127
1128 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1129
1130 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1131 goto nla_put_failure;
1132
1133 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1134
1135 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1136 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1137 #else
1138 if(cfg->proto == VLAN_PROTO_8021AD)
1139 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);
1140 #endif
1141
1142 nla_nest_end(msg, data);
1143 nla_nest_end(msg, linkinfo);
1144
1145 rv = system_rtnl_call(msg);
1146 if (rv)
1147 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1148
1149 return rv;
1150
1151 nla_put_failure:
1152 nlmsg_free(msg);
1153 return -ENOMEM;
1154 }
1155
1156 int system_vlandev_del(struct device *vlandev)
1157 {
1158 return system_link_del(vlandev->ifname);
1159 }
1160
1161 void
1162 system_if_get_settings(struct device *dev, struct device_settings *s)
1163 {
1164 struct ifreq ifr;
1165 char buf[10];
1166
1167 memset(&ifr, 0, sizeof(ifr));
1168 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1169
1170 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1171 s->mtu = ifr.ifr_mtu;
1172 s->flags |= DEV_OPT_MTU;
1173 }
1174
1175 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1176 if (s->mtu6 > 0)
1177 s->flags |= DEV_OPT_MTU6;
1178
1179 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1180 s->txqueuelen = ifr.ifr_qlen;
1181 s->flags |= DEV_OPT_TXQUEUELEN;
1182 }
1183
1184 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1185 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1186 s->flags |= DEV_OPT_MACADDR;
1187 }
1188
1189 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1190 s->ipv6 = !strtoul(buf, NULL, 0);
1191 s->flags |= DEV_OPT_IPV6;
1192 }
1193
1194 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1195 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1196 s->flags |= DEV_OPT_PROMISC;
1197
1198 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1199 s->flags |= DEV_OPT_MULTICAST;
1200 }
1201
1202 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1203 s->rpfilter = strtoul(buf, NULL, 0);
1204 s->flags |= DEV_OPT_RPFILTER;
1205 }
1206
1207 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1208 s->acceptlocal = strtoul(buf, NULL, 0);
1209 s->flags |= DEV_OPT_ACCEPTLOCAL;
1210 }
1211
1212 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1213 s->igmpversion = strtoul(buf, NULL, 0);
1214 s->flags |= DEV_OPT_IGMPVERSION;
1215 }
1216
1217 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1218 s->mldversion = strtoul(buf, NULL, 0);
1219 s->flags |= DEV_OPT_MLDVERSION;
1220 }
1221
1222 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1223 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1224 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1225 }
1226
1227 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1228 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1229 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1230 }
1231
1232 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1233 s->dadtransmits = strtoul(buf, NULL, 0);
1234 s->flags |= DEV_OPT_DADTRANSMITS;
1235 }
1236 }
1237
1238 static void
1239 system_if_set_rps_xps_val(const char *path, int val)
1240 {
1241 char val_buf[8];
1242 glob_t gl;
1243 int i;
1244
1245 if (glob(path, 0, NULL, &gl))
1246 return;
1247
1248 snprintf(val_buf, sizeof(val_buf), "%x", val);
1249 for (i = 0; i < gl.gl_pathc; i++)
1250 system_set_sysctl(gl.gl_pathv[i], val_buf);
1251
1252 globfree(&gl);
1253 }
1254
1255 static void
1256 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1257 {
1258 long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1259 int val;
1260
1261 if (n_cpus < 2)
1262 return;
1263
1264 val = (1 << n_cpus) - 1;
1265 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1266 system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1267
1268 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1269 system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1270 }
1271
1272 void
1273 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1274 {
1275 struct ifreq ifr;
1276 char buf[12];
1277
1278 memset(&ifr, 0, sizeof(ifr));
1279 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1280 if (s->flags & DEV_OPT_MTU & apply_mask) {
1281 ifr.ifr_mtu = s->mtu;
1282 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1283 s->flags &= ~DEV_OPT_MTU;
1284 }
1285 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1286 system_update_ipv6_mtu(dev, s->mtu6);
1287 }
1288 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1289 ifr.ifr_qlen = s->txqueuelen;
1290 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1291 s->flags &= ~DEV_OPT_TXQUEUELEN;
1292 }
1293 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1294 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1295 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1296 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1297 s->flags &= ~DEV_OPT_MACADDR;
1298 }
1299 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1300 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1301 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1302 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1303 !s->promisc ? IFF_PROMISC : 0) < 0)
1304 s->flags &= ~DEV_OPT_PROMISC;
1305 }
1306 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1307 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1308 system_set_rpfilter(dev, buf);
1309 }
1310 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1311 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1312 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1313 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1314 system_set_igmpversion(dev, buf);
1315 }
1316 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1317 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1318 system_set_mldversion(dev, buf);
1319 }
1320 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1321 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1322 system_set_neigh4reachabletime(dev, buf);
1323 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1324 system_set_neigh6reachabletime(dev, buf);
1325 }
1326 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1327 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1328 system_set_dadtransmits(dev, buf);
1329 }
1330 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1331 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1332 !s->multicast ? IFF_MULTICAST : 0) < 0)
1333 s->flags &= ~DEV_OPT_MULTICAST;
1334 }
1335
1336 system_if_apply_rps_xps(dev, s);
1337 }
1338
1339 int system_if_up(struct device *dev)
1340 {
1341 system_if_get_settings(dev, &dev->orig_settings);
1342 /* Only keep orig settings based on what needs to be set */
1343 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1344 dev->orig_settings.flags &= dev->settings.flags;
1345 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1346 return system_if_flags(dev->ifname, IFF_UP, 0);
1347 }
1348
1349 int system_if_down(struct device *dev)
1350 {
1351 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1352 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1353 return ret;
1354 }
1355
1356 struct if_check_data {
1357 struct device *dev;
1358 int pending;
1359 int ret;
1360 };
1361
1362 #ifndef IFF_LOWER_UP
1363 #define IFF_LOWER_UP 0x10000
1364 #endif
1365
1366 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1367 {
1368 struct nlmsghdr *nh = nlmsg_hdr(msg);
1369 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1370 struct if_check_data *chk = (struct if_check_data *)arg;
1371
1372 if (nh->nlmsg_type != RTM_NEWLINK)
1373 return NL_SKIP;
1374
1375 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1376 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1377
1378 return NL_OK;
1379 }
1380
1381 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1382 {
1383 struct if_check_data *chk = (struct if_check_data *)arg;
1384 chk->pending = 0;
1385 return NL_STOP;
1386 }
1387
1388 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1389 {
1390 struct if_check_data *chk = (struct if_check_data *)arg;
1391
1392 device_set_present(chk->dev, false);
1393 device_set_link(chk->dev, false);
1394 chk->pending = err->error;
1395
1396 return NL_STOP;
1397 }
1398
1399 int system_if_check(struct device *dev)
1400 {
1401 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1402 struct nl_msg *msg;
1403 struct ifinfomsg ifi = {
1404 .ifi_family = AF_UNSPEC,
1405 .ifi_index = 0,
1406 };
1407 struct if_check_data chk = {
1408 .dev = dev,
1409 .pending = 1,
1410 };
1411 int ret = 1;
1412
1413 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1414 if (!msg)
1415 goto out;
1416
1417 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1418 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1419 goto free;
1420
1421 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1422 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1423 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1424
1425 nl_send_auto_complete(sock_rtnl, msg);
1426 while (chk.pending > 0)
1427 nl_recvmsgs(sock_rtnl, cb);
1428
1429 ret = chk.pending;
1430
1431 free:
1432 nlmsg_free(msg);
1433 out:
1434 nl_cb_put(cb);
1435 return ret;
1436 }
1437
1438 struct device *
1439 system_if_get_parent(struct device *dev)
1440 {
1441 char buf[64], *devname;
1442 int ifindex, iflink, len;
1443 FILE *f;
1444
1445 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1446 f = fopen(buf, "r");
1447 if (!f)
1448 return NULL;
1449
1450 len = fread(buf, 1, sizeof(buf) - 1, f);
1451 fclose(f);
1452
1453 if (len <= 0)
1454 return NULL;
1455
1456 buf[len] = 0;
1457 iflink = strtoul(buf, NULL, 0);
1458 ifindex = system_if_resolve(dev);
1459 if (!iflink || iflink == ifindex)
1460 return NULL;
1461
1462 devname = if_indextoname(iflink, buf);
1463 if (!devname)
1464 return NULL;
1465
1466 return device_get(devname, true);
1467 }
1468
1469 static bool
1470 read_string_file(int dir_fd, const char *file, char *buf, int len)
1471 {
1472 bool ret = false;
1473 char *c;
1474 int fd;
1475
1476 fd = openat(dir_fd, file, O_RDONLY);
1477 if (fd < 0)
1478 return false;
1479
1480 retry:
1481 len = read(fd, buf, len - 1);
1482 if (len < 0) {
1483 if (errno == EINTR)
1484 goto retry;
1485 } else if (len > 0) {
1486 buf[len] = 0;
1487
1488 c = strchr(buf, '\n');
1489 if (c)
1490 *c = 0;
1491
1492 ret = true;
1493 }
1494
1495 close(fd);
1496
1497 return ret;
1498 }
1499
1500 static bool
1501 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1502 {
1503 char buf[64];
1504 bool ret = false;
1505
1506 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1507 if (ret)
1508 *val = strtoull(buf, NULL, 0);
1509
1510 return ret;
1511 }
1512
1513 /* Assume advertised flags == supported flags */
1514 static const struct {
1515 uint32_t mask;
1516 const char *name;
1517 } ethtool_link_modes[] = {
1518 { ADVERTISED_10baseT_Half, "10H" },
1519 { ADVERTISED_10baseT_Full, "10F" },
1520 { ADVERTISED_100baseT_Half, "100H" },
1521 { ADVERTISED_100baseT_Full, "100F" },
1522 { ADVERTISED_1000baseT_Half, "1000H" },
1523 { ADVERTISED_1000baseT_Full, "1000F" },
1524 };
1525
1526 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1527 {
1528 int i;
1529 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1530 if (mask & ethtool_link_modes[i].mask)
1531 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1532 }
1533 }
1534
1535 bool
1536 system_if_force_external(const char *ifname)
1537 {
1538 char buf[64];
1539 struct stat s;
1540
1541 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1542 return stat(buf, &s) == 0;
1543 }
1544
1545 int
1546 system_if_dump_info(struct device *dev, struct blob_buf *b)
1547 {
1548 struct ethtool_cmd ecmd;
1549 struct ifreq ifr;
1550 char buf[64], *s;
1551 void *c;
1552 int dir_fd;
1553
1554 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1555 dir_fd = open(buf, O_DIRECTORY);
1556
1557 memset(&ecmd, 0, sizeof(ecmd));
1558 memset(&ifr, 0, sizeof(ifr));
1559 strcpy(ifr.ifr_name, dev->ifname);
1560 ifr.ifr_data = (caddr_t) &ecmd;
1561 ecmd.cmd = ETHTOOL_GSET;
1562
1563 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1564 c = blobmsg_open_array(b, "link-advertising");
1565 system_add_link_modes(b, ecmd.advertising);
1566 blobmsg_close_array(b, c);
1567
1568 c = blobmsg_open_array(b, "link-supported");
1569 system_add_link_modes(b, ecmd.supported);
1570 blobmsg_close_array(b, c);
1571
1572 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1573 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1574 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1575 blobmsg_add_string_buffer(b);
1576 }
1577
1578 close(dir_fd);
1579 return 0;
1580 }
1581
1582 int
1583 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1584 {
1585 const char *const counters[] = {
1586 "collisions", "rx_frame_errors", "tx_compressed",
1587 "multicast", "rx_length_errors", "tx_dropped",
1588 "rx_bytes", "rx_missed_errors", "tx_errors",
1589 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1590 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1591 "rx_dropped", "tx_aborted_errors", "tx_packets",
1592 "rx_errors", "tx_bytes", "tx_window_errors",
1593 "rx_fifo_errors", "tx_carrier_errors",
1594 };
1595 char buf[64];
1596 int stats_dir;
1597 int i;
1598 uint64_t val = 0;
1599
1600 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1601 stats_dir = open(buf, O_DIRECTORY);
1602 if (stats_dir < 0)
1603 return -1;
1604
1605 for (i = 0; i < ARRAY_SIZE(counters); i++)
1606 if (read_uint64_file(stats_dir, counters[i], &val))
1607 blobmsg_add_u64(b, counters[i], val);
1608
1609 close(stats_dir);
1610 return 0;
1611 }
1612
1613 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1614 {
1615 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1616 int alen = v4 ? 4 : 16;
1617 unsigned int flags = 0;
1618 struct ifaddrmsg ifa = {
1619 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1620 .ifa_prefixlen = addr->mask,
1621 .ifa_index = dev->ifindex,
1622 };
1623
1624 struct nl_msg *msg;
1625 if (cmd == RTM_NEWADDR)
1626 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1627
1628 msg = nlmsg_alloc_simple(cmd, flags);
1629 if (!msg)
1630 return -1;
1631
1632 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1633 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1634 if (v4) {
1635 if (addr->broadcast)
1636 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1637 if (addr->point_to_point)
1638 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1639 } else {
1640 time_t now = system_get_rtime();
1641 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1642
1643 if (addr->preferred_until) {
1644 int64_t preferred = addr->preferred_until - now;
1645 if (preferred < 0)
1646 preferred = 0;
1647 else if (preferred > UINT32_MAX)
1648 preferred = UINT32_MAX;
1649
1650 cinfo.ifa_prefered = preferred;
1651 }
1652
1653 if (addr->valid_until) {
1654 int64_t valid = addr->valid_until - now;
1655 if (valid <= 0) {
1656 nlmsg_free(msg);
1657 return -1;
1658 }
1659 else if (valid > UINT32_MAX)
1660 valid = UINT32_MAX;
1661
1662 cinfo.ifa_valid = valid;
1663 }
1664
1665 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1666
1667 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1668 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1669 }
1670
1671 return system_rtnl_call(msg);
1672 }
1673
1674 int system_add_address(struct device *dev, struct device_addr *addr)
1675 {
1676 return system_addr(dev, addr, RTM_NEWADDR);
1677 }
1678
1679 int system_del_address(struct device *dev, struct device_addr *addr)
1680 {
1681 return system_addr(dev, addr, RTM_DELADDR);
1682 }
1683
1684 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1685 {
1686 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1687 bool have_gw;
1688 unsigned int flags = 0;
1689
1690 if (alen == 4)
1691 have_gw = !!route->nexthop.in.s_addr;
1692 else
1693 have_gw = route->nexthop.in6.s6_addr32[0] ||
1694 route->nexthop.in6.s6_addr32[1] ||
1695 route->nexthop.in6.s6_addr32[2] ||
1696 route->nexthop.in6.s6_addr32[3];
1697
1698 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1699 ? route->table : RT_TABLE_MAIN;
1700
1701 struct rtmsg rtm = {
1702 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1703 .rtm_dst_len = route->mask,
1704 .rtm_src_len = route->sourcemask,
1705 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1706 .rtm_protocol = (route->flags & DEVADDR_KERNEL) ? RTPROT_KERNEL : RTPROT_STATIC,
1707 .rtm_scope = RT_SCOPE_NOWHERE,
1708 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1709 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1710 };
1711 struct nl_msg *msg;
1712
1713 if (cmd == RTM_NEWROUTE) {
1714 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1715
1716 if (!dev) { // Add null-route
1717 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1718 rtm.rtm_type = RTN_UNREACHABLE;
1719 }
1720 else
1721 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1722 }
1723
1724 if (route->flags & DEVROUTE_TYPE) {
1725 rtm.rtm_type = route->type;
1726 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1727 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1728 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1729 rtm.rtm_table = RT_TABLE_LOCAL;
1730 }
1731
1732 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1733 rtm.rtm_scope = RT_SCOPE_HOST;
1734 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1735 rtm.rtm_type == RTN_ANYCAST) {
1736 rtm.rtm_scope = RT_SCOPE_LINK;
1737 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1738 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1739 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1740 dev = NULL;
1741 }
1742 }
1743
1744 msg = nlmsg_alloc_simple(cmd, flags);
1745 if (!msg)
1746 return -1;
1747
1748 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1749
1750 if (route->mask)
1751 nla_put(msg, RTA_DST, alen, &route->addr);
1752
1753 if (route->sourcemask) {
1754 if (rtm.rtm_family == AF_INET)
1755 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1756 else
1757 nla_put(msg, RTA_SRC, alen, &route->source);
1758 }
1759
1760 if (route->metric > 0)
1761 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1762
1763 if (have_gw)
1764 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1765
1766 if (dev)
1767 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1768
1769 if (table >= 256)
1770 nla_put_u32(msg, RTA_TABLE, table);
1771
1772 if (route->flags & DEVROUTE_MTU) {
1773 struct nlattr *metrics;
1774
1775 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1776 goto nla_put_failure;
1777
1778 nla_put_u32(msg, RTAX_MTU, route->mtu);
1779
1780 nla_nest_end(msg, metrics);
1781 }
1782
1783 return system_rtnl_call(msg);
1784
1785 nla_put_failure:
1786 nlmsg_free(msg);
1787 return -ENOMEM;
1788 }
1789
1790 int system_add_route(struct device *dev, struct device_route *route)
1791 {
1792 return system_rt(dev, route, RTM_NEWROUTE);
1793 }
1794
1795 int system_del_route(struct device *dev, struct device_route *route)
1796 {
1797 return system_rt(dev, route, RTM_DELROUTE);
1798 }
1799
1800 int system_flush_routes(void)
1801 {
1802 const char *names[] = {
1803 "/proc/sys/net/ipv4/route/flush",
1804 "/proc/sys/net/ipv6/route/flush"
1805 };
1806 int fd, i;
1807
1808 for (i = 0; i < ARRAY_SIZE(names); i++) {
1809 fd = open(names[i], O_WRONLY);
1810 if (fd < 0)
1811 continue;
1812
1813 if (write(fd, "-1", 2)) {}
1814 close(fd);
1815 }
1816 return 0;
1817 }
1818
1819 bool system_resolve_rt_type(const char *type, unsigned int *id)
1820 {
1821 return system_rtn_aton(type, id);
1822 }
1823
1824 bool system_resolve_rt_table(const char *name, unsigned int *id)
1825 {
1826 FILE *f;
1827 char *e, buf[128];
1828 unsigned int n, table = RT_TABLE_UNSPEC;
1829
1830 /* first try to parse table as number */
1831 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
1832 table = n;
1833
1834 /* handle well known aliases */
1835 else if (!strcmp(name, "default"))
1836 table = RT_TABLE_DEFAULT;
1837 else if (!strcmp(name, "main"))
1838 table = RT_TABLE_MAIN;
1839 else if (!strcmp(name, "local"))
1840 table = RT_TABLE_LOCAL;
1841 else if (!strcmp(name, "prelocal"))
1842 table = RT_TABLE_PRELOCAL;
1843
1844 /* try to look up name in /etc/iproute2/rt_tables */
1845 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
1846 {
1847 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
1848 {
1849 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
1850 continue;
1851
1852 n = strtoul(e, NULL, 10);
1853 e = strtok(NULL, " \t\n");
1854
1855 if (e && !strcmp(e, name))
1856 {
1857 table = n;
1858 break;
1859 }
1860 }
1861
1862 fclose(f);
1863 }
1864
1865 if (table == RT_TABLE_UNSPEC)
1866 return false;
1867
1868 *id = table;
1869 return true;
1870 }
1871
1872 bool system_is_default_rt_table(unsigned int id)
1873 {
1874 return (id == RT_TABLE_MAIN);
1875 }
1876
1877 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
1878 {
1879 char *e;
1880 unsigned int n;
1881
1882 if (!strcmp(filter, "strict"))
1883 n = 1;
1884 else if (!strcmp(filter, "loose"))
1885 n = 2;
1886 else {
1887 n = strtoul(filter, &e, 0);
1888 if (*e || e == filter || n > 2)
1889 return false;
1890 }
1891
1892 *id = n;
1893 return true;
1894 }
1895
1896 static int system_iprule(struct iprule *rule, int cmd)
1897 {
1898 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
1899
1900 struct nl_msg *msg;
1901 struct rtmsg rtm = {
1902 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1903 .rtm_protocol = RTPROT_STATIC,
1904 .rtm_scope = RT_SCOPE_UNIVERSE,
1905 .rtm_table = RT_TABLE_UNSPEC,
1906 .rtm_type = RTN_UNSPEC,
1907 .rtm_flags = 0,
1908 };
1909
1910 if (cmd == RTM_NEWRULE)
1911 rtm.rtm_type = RTN_UNICAST;
1912
1913 if (rule->invert)
1914 rtm.rtm_flags |= FIB_RULE_INVERT;
1915
1916 if (rule->flags & IPRULE_SRC)
1917 rtm.rtm_src_len = rule->src_mask;
1918
1919 if (rule->flags & IPRULE_DEST)
1920 rtm.rtm_dst_len = rule->dest_mask;
1921
1922 if (rule->flags & IPRULE_TOS)
1923 rtm.rtm_tos = rule->tos;
1924
1925 if (rule->flags & IPRULE_LOOKUP) {
1926 if (rule->lookup < 256)
1927 rtm.rtm_table = rule->lookup;
1928 }
1929
1930 if (rule->flags & IPRULE_ACTION)
1931 rtm.rtm_type = rule->action;
1932 else if (rule->flags & IPRULE_GOTO)
1933 rtm.rtm_type = FR_ACT_GOTO;
1934 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
1935 rtm.rtm_type = FR_ACT_NOP;
1936
1937 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
1938
1939 if (!msg)
1940 return -1;
1941
1942 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1943
1944 if (rule->flags & IPRULE_IN)
1945 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
1946
1947 if (rule->flags & IPRULE_OUT)
1948 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
1949
1950 if (rule->flags & IPRULE_SRC)
1951 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
1952
1953 if (rule->flags & IPRULE_DEST)
1954 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
1955
1956 if (rule->flags & IPRULE_PRIORITY)
1957 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
1958 else if (cmd == RTM_NEWRULE)
1959 nla_put_u32(msg, FRA_PRIORITY, rule->order);
1960
1961 if (rule->flags & IPRULE_FWMARK)
1962 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
1963
1964 if (rule->flags & IPRULE_FWMASK)
1965 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
1966
1967 if (rule->flags & IPRULE_LOOKUP) {
1968 if (rule->lookup >= 256)
1969 nla_put_u32(msg, FRA_TABLE, rule->lookup);
1970 }
1971
1972 if (rule->flags & IPRULE_GOTO)
1973 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
1974
1975 return system_rtnl_call(msg);
1976 }
1977
1978 int system_add_iprule(struct iprule *rule)
1979 {
1980 return system_iprule(rule, RTM_NEWRULE);
1981 }
1982
1983 int system_del_iprule(struct iprule *rule)
1984 {
1985 return system_iprule(rule, RTM_DELRULE);
1986 }
1987
1988 int system_flush_iprules(void)
1989 {
1990 int rv = 0;
1991 struct iprule rule;
1992
1993 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
1994 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
1995
1996 memset(&rule, 0, sizeof(rule));
1997
1998
1999 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2000
2001 rule.priority = 0;
2002 rule.lookup = RT_TABLE_PRELOCAL;
2003 rv |= system_iprule(&rule, RTM_NEWRULE);
2004
2005 rule.priority = 1;
2006 rule.lookup = RT_TABLE_LOCAL;
2007 rv |= system_iprule(&rule, RTM_NEWRULE);
2008
2009 rule.priority = 32766;
2010 rule.lookup = RT_TABLE_MAIN;
2011 rv |= system_iprule(&rule, RTM_NEWRULE);
2012
2013 rule.priority = 32767;
2014 rule.lookup = RT_TABLE_DEFAULT;
2015 rv |= system_iprule(&rule, RTM_NEWRULE);
2016
2017
2018 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2019
2020 rule.priority = 0;
2021 rule.lookup = RT_TABLE_PRELOCAL;
2022 rv |= system_iprule(&rule, RTM_NEWRULE);
2023
2024 rule.priority = 1;
2025 rule.lookup = RT_TABLE_LOCAL;
2026 rv |= system_iprule(&rule, RTM_NEWRULE);
2027
2028 rule.priority = 32766;
2029 rule.lookup = RT_TABLE_MAIN;
2030 rv |= system_iprule(&rule, RTM_NEWRULE);
2031
2032 return rv;
2033 }
2034
2035 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2036 {
2037 return system_rtn_aton(action, id);
2038 }
2039
2040 time_t system_get_rtime(void)
2041 {
2042 struct timespec ts;
2043 struct timeval tv;
2044
2045 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2046 return ts.tv_sec;
2047
2048 if (gettimeofday(&tv, NULL) == 0)
2049 return tv.tv_sec;
2050
2051 return 0;
2052 }
2053
2054 #ifndef IP_DF
2055 #define IP_DF 0x4000
2056 #endif
2057
2058 static int tunnel_ioctl(const char *name, int cmd, void *p)
2059 {
2060 struct ifreq ifr;
2061
2062 memset(&ifr, 0, sizeof(ifr));
2063 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2064 ifr.ifr_ifru.ifru_data = p;
2065 return ioctl(sock_ioctl, cmd, &ifr);
2066 }
2067
2068 #ifdef IFLA_IPTUN_MAX
2069 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2070 static int system_add_gre_tunnel(const char *name, const char *kind,
2071 const unsigned int link, struct blob_attr **tb, bool v6)
2072 {
2073 struct nl_msg *nlm;
2074 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2075 struct blob_attr *cur;
2076 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2077 uint16_t iflags = 0, oflags = 0;
2078 uint8_t tos = 0;
2079 int ret = 0, ttl = 64;
2080
2081 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2082 if (!nlm)
2083 return -1;
2084
2085 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2086 nla_put_string(nlm, IFLA_IFNAME, name);
2087
2088 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2089 if (!linkinfo) {
2090 ret = -ENOMEM;
2091 goto failure;
2092 }
2093
2094 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2095 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2096 if (!infodata) {
2097 ret = -ENOMEM;
2098 goto failure;
2099 }
2100
2101 if (link)
2102 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2103
2104 if ((cur = tb[TUNNEL_ATTR_TTL]))
2105 ttl = blobmsg_get_u32(cur);
2106
2107 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2108
2109 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2110 char *str = blobmsg_get_string(cur);
2111 if (strcmp(str, "inherit")) {
2112 unsigned uval;
2113
2114 if (!system_tos_aton(str, &uval)) {
2115 ret = -EINVAL;
2116 goto failure;
2117 }
2118
2119 if (v6)
2120 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2121 else
2122 tos = uval;
2123 } else {
2124 if (v6)
2125 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2126 else
2127 tos = 1;
2128 }
2129 }
2130
2131 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2132 uint8_t icsum, ocsum, iseqno, oseqno;
2133 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2134 &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2135 ret = -EINVAL;
2136 goto failure;
2137 }
2138
2139 if (ikey)
2140 iflags |= GRE_KEY;
2141
2142 if (okey)
2143 oflags |= GRE_KEY;
2144
2145 if (icsum)
2146 iflags |= GRE_CSUM;
2147
2148 if (ocsum)
2149 oflags |= GRE_CSUM;
2150
2151 if (iseqno)
2152 iflags |= GRE_SEQ;
2153
2154 if (oseqno)
2155 oflags |= GRE_SEQ;
2156 }
2157
2158 if (v6) {
2159 struct in6_addr in6buf;
2160 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2161 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2162 ret = -EINVAL;
2163 goto failure;
2164 }
2165 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2166 }
2167
2168 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2169 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2170 ret = -EINVAL;
2171 goto failure;
2172 }
2173 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2174 }
2175 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2176
2177 if (flowinfo)
2178 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2179
2180 if (flags)
2181 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2182 } else {
2183 struct in_addr inbuf;
2184 bool set_df = true;
2185
2186 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2187 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2188 ret = -EINVAL;
2189 goto failure;
2190 }
2191 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2192 }
2193
2194 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2195 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2196 ret = -EINVAL;
2197 goto failure;
2198 }
2199 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2200
2201 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2202 if (!okey) {
2203 okey = inbuf.s_addr;
2204 oflags |= GRE_KEY;
2205 }
2206
2207 if (!ikey) {
2208 ikey = inbuf.s_addr;
2209 iflags |= GRE_KEY;
2210 }
2211 }
2212 }
2213
2214 if ((cur = tb[TUNNEL_ATTR_DF]))
2215 set_df = blobmsg_get_bool(cur);
2216
2217 /* ttl !=0 and nopmtudisc are incompatible */
2218 if (ttl && !set_df) {
2219 ret = -EINVAL;
2220 goto failure;
2221 }
2222
2223 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2224
2225 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2226 }
2227
2228 if (oflags)
2229 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2230
2231 if (iflags)
2232 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2233
2234 if (okey)
2235 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2236
2237 if (ikey)
2238 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2239
2240 nla_nest_end(nlm, infodata);
2241 nla_nest_end(nlm, linkinfo);
2242
2243 return system_rtnl_call(nlm);
2244
2245 failure:
2246 nlmsg_free(nlm);
2247 return ret;
2248 }
2249 #endif
2250
2251 #ifdef IFLA_VTI_MAX
2252 static int system_add_vti_tunnel(const char *name, const char *kind,
2253 const unsigned int link, struct blob_attr **tb, bool v6)
2254 {
2255 struct nl_msg *nlm;
2256 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2257 struct blob_attr *cur;
2258 uint32_t ikey = 0, okey = 0;
2259 int ret = 0;
2260
2261 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2262 if (!nlm)
2263 return -1;
2264
2265 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2266 nla_put_string(nlm, IFLA_IFNAME, name);
2267
2268 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2269 if (!linkinfo) {
2270 ret = -ENOMEM;
2271 goto failure;
2272 }
2273
2274 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2275 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2276 if (!infodata) {
2277 ret = -ENOMEM;
2278 goto failure;
2279 }
2280
2281 if (link)
2282 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2283
2284 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2285 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2286 &ikey, &okey) < 2) {
2287 ret = -EINVAL;
2288 goto failure;
2289 }
2290 }
2291
2292 if (v6) {
2293 struct in6_addr in6buf;
2294 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2295 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2296 ret = -EINVAL;
2297 goto failure;
2298 }
2299 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2300 }
2301
2302 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2303 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2304 ret = -EINVAL;
2305 goto failure;
2306 }
2307 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2308 }
2309
2310 } else {
2311 struct in_addr inbuf;
2312
2313 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2314 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2315 ret = -EINVAL;
2316 goto failure;
2317 }
2318 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2319 }
2320
2321 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2322 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2323 ret = -EINVAL;
2324 goto failure;
2325 }
2326 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2327 }
2328
2329 }
2330
2331 if (okey)
2332 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2333
2334 if (ikey)
2335 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2336
2337 nla_nest_end(nlm, infodata);
2338 nla_nest_end(nlm, linkinfo);
2339
2340 return system_rtnl_call(nlm);
2341
2342 failure:
2343 nlmsg_free(nlm);
2344 return ret;
2345 }
2346 #endif
2347
2348 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2349 {
2350 struct blob_attr *cur;
2351 bool set_df = true;
2352 struct ip_tunnel_parm p = {
2353 .link = link,
2354 .iph = {
2355 .version = 4,
2356 .ihl = 5,
2357 .protocol = proto,
2358 }
2359 };
2360
2361 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2362 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2363 return -EINVAL;
2364
2365 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2366 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2367 return -EINVAL;
2368
2369 if ((cur = tb[TUNNEL_ATTR_DF]))
2370 set_df = blobmsg_get_bool(cur);
2371
2372 if ((cur = tb[TUNNEL_ATTR_TTL]))
2373 p.iph.ttl = blobmsg_get_u32(cur);
2374
2375 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2376 char *str = blobmsg_get_string(cur);
2377 if (strcmp(str, "inherit")) {
2378 unsigned uval;
2379
2380 if (!system_tos_aton(str, &uval))
2381 return -EINVAL;
2382
2383 p.iph.tos = uval;
2384 } else
2385 p.iph.tos = 1;
2386 }
2387
2388 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2389 /* ttl !=0 and nopmtudisc are incompatible */
2390 if (p.iph.ttl && p.iph.frag_off == 0)
2391 return -EINVAL;
2392
2393 strncpy(p.name, name, sizeof(p.name));
2394
2395 switch (p.iph.protocol) {
2396 case IPPROTO_IPIP:
2397 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2398 case IPPROTO_IPV6:
2399 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2400 default:
2401 break;
2402 }
2403 return -1;
2404 }
2405
2406 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2407 {
2408 struct blob_attr *cur;
2409 const char *str;
2410
2411 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2412 return -EINVAL;
2413 str = blobmsg_data(cur);
2414
2415 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2416 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2417 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6"))
2418 return system_link_del(name);
2419 else
2420 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2421 }
2422
2423 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2424 {
2425 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2426
2427 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2428 blob_data(attr), blob_len(attr));
2429
2430 return __system_del_ip_tunnel(name, tb);
2431 }
2432
2433 int system_update_ipv6_mtu(struct device *dev, int mtu)
2434 {
2435 int ret = -1;
2436 char buf[64];
2437 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2438 dev->ifname);
2439
2440 int fd = open(buf, O_RDWR);
2441
2442 if (!mtu) {
2443 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2444 if (len < 0)
2445 goto out;
2446
2447 buf[len] = 0;
2448 ret = atoi(buf);
2449 } else {
2450 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2451 ret = mtu;
2452 }
2453
2454 out:
2455 close(fd);
2456 return ret;
2457 }
2458
2459 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2460 {
2461 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2462 struct blob_attr *cur;
2463 const char *str;
2464
2465 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2466 blob_data(attr), blob_len(attr));
2467
2468 __system_del_ip_tunnel(name, tb);
2469
2470 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2471 return -EINVAL;
2472 str = blobmsg_data(cur);
2473
2474 unsigned int ttl = 0;
2475 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2476 ttl = blobmsg_get_u32(cur);
2477 if (ttl > 255)
2478 return -EINVAL;
2479 }
2480
2481 unsigned int link = 0;
2482 if ((cur = tb[TUNNEL_ATTR_LINK])) {
2483 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2484 if (!iface)
2485 return -EINVAL;
2486
2487 if (iface->l3_dev.dev)
2488 link = iface->l3_dev.dev->ifindex;
2489 }
2490
2491 if (!strcmp(str, "sit")) {
2492 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2493 return -1;
2494
2495 #ifdef SIOCADD6RD
2496 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2497 unsigned int mask;
2498 struct ip_tunnel_6rd p6;
2499
2500 memset(&p6, 0, sizeof(p6));
2501
2502 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2503 &p6.prefix, &mask) || mask > 128)
2504 return -EINVAL;
2505 p6.prefixlen = mask;
2506
2507 if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2508 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2509 &p6.relay_prefix, &mask) || mask > 32)
2510 return -EINVAL;
2511 p6.relay_prefixlen = mask;
2512 }
2513
2514 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2515 __system_del_ip_tunnel(name, tb);
2516 return -1;
2517 }
2518 }
2519 #endif
2520 #ifdef IFLA_IPTUN_MAX
2521 } else if (!strcmp(str, "ipip6")) {
2522 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2523 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2524 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2525 int ret = 0;
2526
2527 if (!nlm)
2528 return -1;
2529
2530 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2531 nla_put_string(nlm, IFLA_IFNAME, name);
2532
2533 if (link)
2534 nla_put_u32(nlm, IFLA_LINK, link);
2535
2536 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2537 if (!linkinfo) {
2538 ret = -ENOMEM;
2539 goto failure;
2540 }
2541 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2542 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2543 if (!infodata) {
2544 ret = -ENOMEM;
2545 goto failure;
2546 }
2547
2548 if (link)
2549 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2550
2551 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2552 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2553 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2554
2555 struct in6_addr in6buf;
2556 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2557 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2558 ret = -EINVAL;
2559 goto failure;
2560 }
2561 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2562 }
2563
2564 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2565 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2566 ret = -EINVAL;
2567 goto failure;
2568 }
2569 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2570 }
2571
2572 #ifdef IFLA_IPTUN_FMR_MAX
2573 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2574 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2575
2576 struct blob_attr *fmr;
2577 unsigned rem, fmrcnt = 0;
2578 blobmsg_for_each_attr(fmr, cur, rem) {
2579 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2580 continue;
2581
2582 unsigned ip4len, ip6len, ealen, offset = 6;
2583 char ip6buf[48];
2584 char ip4buf[16];
2585
2586 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2587 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2588 ret = -EINVAL;
2589 goto failure;
2590 }
2591
2592 struct in6_addr ip6prefix;
2593 struct in_addr ip4prefix;
2594 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2595 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2596 ret = -EINVAL;
2597 goto failure;
2598 }
2599
2600 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2601
2602 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2603 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2604 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2605 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2606 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2607 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2608
2609 nla_nest_end(nlm, rule);
2610 }
2611
2612 nla_nest_end(nlm, fmrs);
2613 }
2614 #endif
2615
2616 nla_nest_end(nlm, infodata);
2617 nla_nest_end(nlm, linkinfo);
2618
2619 return system_rtnl_call(nlm);
2620 failure:
2621 nlmsg_free(nlm);
2622 return ret;
2623 } else if (!strcmp(str, "greip")) {
2624 return system_add_gre_tunnel(name, "gre", link, tb, false);
2625 } else if (!strcmp(str, "gretapip")) {
2626 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2627 } else if (!strcmp(str, "greip6")) {
2628 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2629 } else if (!strcmp(str, "gretapip6")) {
2630 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2631 #ifdef IFLA_VTI_MAX
2632 } else if (!strcmp(str, "vtiip")) {
2633 return system_add_vti_tunnel(name, "vti", link, tb, false);
2634 } else if (!strcmp(str, "vtiip6")) {
2635 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2636 #endif
2637 #endif
2638 } else if (!strcmp(str, "ipip")) {
2639 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2640 }
2641 else
2642 return -EINVAL;
2643
2644 return 0;
2645 }
OpenWrt Network interface configuration daemon