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