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interface-ip: route proto config support (FS#170)
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2
10 * as published by the Free Software Foundation
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17 #define _GNU_SOURCE
18
19 #include <sys/socket.h>
20 #include <sys/ioctl.h>
21 #include <sys/stat.h>
22 #include <sys/syscall.h>
23
24 #include <net/if.h>
25 #include <net/if_arp.h>
26
27 #include <arpa/inet.h>
28 #include <netinet/in.h>
29
30 #include <linux/rtnetlink.h>
31 #include <linux/sockios.h>
32 #include <linux/ip.h>
33 #include <linux/if_addr.h>
34 #include <linux/if_link.h>
35 #include <linux/if_vlan.h>
36 #include <linux/if_bridge.h>
37 #include <linux/if_tunnel.h>
38 #include <linux/ip6_tunnel.h>
39 #include <linux/ethtool.h>
40 #include <linux/fib_rules.h>
41 #include <linux/version.h>
42
43 #ifndef RTN_FAILED_POLICY
44 #define RTN_FAILED_POLICY 12
45 #endif
46
47 #ifndef IFA_F_NOPREFIXROUTE
48 #define IFA_F_NOPREFIXROUTE 0x200
49 #endif
50
51 #ifndef IFA_FLAGS
52 #define IFA_FLAGS (IFA_MULTICAST + 1)
53 #endif
54
55 #include <string.h>
56 #include <fcntl.h>
57 #include <glob.h>
58 #include <time.h>
59 #include <unistd.h>
60
61 #include <netlink/msg.h>
62 #include <netlink/attr.h>
63 #include <netlink/socket.h>
64 #include <libubox/uloop.h>
65
66 #include "netifd.h"
67 #include "device.h"
68 #include "system.h"
69
70 struct event_socket {
71 struct uloop_fd uloop;
72 struct nl_sock *sock;
73 int bufsize;
74 };
75
76 static int sock_ioctl = -1;
77 static struct nl_sock *sock_rtnl = NULL;
78
79 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
80 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
81
82 static char dev_buf[256];
83
84 static void
85 handler_nl_event(struct uloop_fd *u, unsigned int events)
86 {
87 struct event_socket *ev = container_of(u, struct event_socket, uloop);
88 int err;
89 socklen_t errlen = sizeof(err);
90
91 if (!u->error) {
92 nl_recvmsgs_default(ev->sock);
93 return;
94 }
95
96 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
97 goto abort;
98
99 switch(err) {
100 case ENOBUFS:
101 // Increase rx buffer size on netlink socket
102 ev->bufsize *= 2;
103 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
104 goto abort;
105
106 // Request full dump since some info got dropped
107 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
108 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
109 break;
110
111 default:
112 goto abort;
113 }
114 u->error = false;
115 return;
116
117 abort:
118 uloop_fd_delete(&ev->uloop);
119 return;
120 }
121
122 static struct nl_sock *
123 create_socket(int protocol, int groups)
124 {
125 struct nl_sock *sock;
126
127 sock = nl_socket_alloc();
128 if (!sock)
129 return NULL;
130
131 if (groups)
132 nl_join_groups(sock, groups);
133
134 if (nl_connect(sock, protocol))
135 return NULL;
136
137 return sock;
138 }
139
140 static bool
141 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
142 uloop_fd_handler cb, int flags)
143 {
144 ev->sock = create_socket(protocol, groups);
145 if (!ev->sock)
146 return false;
147
148 ev->uloop.fd = nl_socket_get_fd(ev->sock);
149 ev->uloop.cb = cb;
150 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
151 return false;
152
153 return true;
154 }
155
156 static bool
157 create_event_socket(struct event_socket *ev, int protocol,
158 int (*cb)(struct nl_msg *msg, void *arg))
159 {
160 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
161 return false;
162
163 // Install the valid custom callback handler
164 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
165
166 // Disable sequence number checking on event sockets
167 nl_socket_disable_seq_check(ev->sock);
168
169 // Increase rx buffer size to 65K on event sockets
170 ev->bufsize = 65535;
171 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
172 return false;
173
174 return true;
175 }
176
177 static bool
178 system_rtn_aton(const char *src, unsigned int *dst)
179 {
180 char *e;
181 unsigned int n;
182
183 if (!strcmp(src, "local"))
184 n = RTN_LOCAL;
185 else if (!strcmp(src, "nat"))
186 n = RTN_NAT;
187 else if (!strcmp(src, "broadcast"))
188 n = RTN_BROADCAST;
189 else if (!strcmp(src, "anycast"))
190 n = RTN_ANYCAST;
191 else if (!strcmp(src, "multicast"))
192 n = RTN_MULTICAST;
193 else if (!strcmp(src, "prohibit"))
194 n = RTN_PROHIBIT;
195 else if (!strcmp(src, "unreachable"))
196 n = RTN_UNREACHABLE;
197 else if (!strcmp(src, "blackhole"))
198 n = RTN_BLACKHOLE;
199 else if (!strcmp(src, "xresolve"))
200 n = RTN_XRESOLVE;
201 else if (!strcmp(src, "unicast"))
202 n = RTN_UNICAST;
203 else if (!strcmp(src, "throw"))
204 n = RTN_THROW;
205 else if (!strcmp(src, "failed_policy"))
206 n = RTN_FAILED_POLICY;
207 else {
208 n = strtoul(src, &e, 0);
209 if (!e || *e || e == src || n > 255)
210 return false;
211 }
212
213 *dst = n;
214 return true;
215 }
216
217 static bool
218 system_tos_aton(const char *src, unsigned *dst)
219 {
220 char *e;
221
222 *dst = strtoul(src, &e, 16);
223 if (e == src || *e || *dst > 255)
224 return false;
225
226 return true;
227 }
228
229 int system_init(void)
230 {
231 static struct event_socket rtnl_event;
232 static struct event_socket hotplug_event;
233
234 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
235 system_fd_set_cloexec(sock_ioctl);
236
237 // Prepare socket for routing / address control
238 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
239 if (!sock_rtnl)
240 return -1;
241
242 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
243 return -1;
244
245 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
246 handle_hotplug_event, 0))
247 return -1;
248
249 // Receive network link events form kernel
250 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
251
252 return 0;
253 }
254
255 static void system_set_sysctl(const char *path, const char *val)
256 {
257 int fd;
258
259 fd = open(path, O_WRONLY);
260 if (fd < 0)
261 return;
262
263 if (write(fd, val, strlen(val))) {}
264 close(fd);
265 }
266
267 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
268 {
269 snprintf(dev_buf, sizeof(dev_buf), path, device);
270 system_set_sysctl(dev_buf, val);
271 }
272
273 static void system_set_disable_ipv6(struct device *dev, const char *val)
274 {
275 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
276 }
277
278 static void system_set_rpfilter(struct device *dev, const char *val)
279 {
280 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
281 }
282
283 static void system_set_acceptlocal(struct device *dev, const char *val)
284 {
285 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
286 }
287
288 static void system_set_igmpversion(struct device *dev, const char *val)
289 {
290 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
291 }
292
293 static void system_set_mldversion(struct device *dev, const char *val)
294 {
295 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
296 }
297
298 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
299 {
300 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
301 }
302
303 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
304 {
305 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
306 }
307
308 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
309 {
310 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
311 }
312
313 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
314 {
315 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
316 }
317
318 static void system_set_dadtransmits(struct device *dev, const char *val)
319 {
320 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
321 }
322
323 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
324 {
325 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
326 }
327
328 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
329 {
330 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
331 }
332
333 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
334 {
335 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
336 }
337
338 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
339 {
340 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
341 "/sys/class/net/%s/brport/multicast_router",
342 dev->ifname, val);
343 }
344
345 static void system_bridge_set_robustness(struct device *dev, const char *val)
346 {
347 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
348 dev->ifname, val);
349 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
350 dev->ifname, val);
351 }
352
353 static void system_bridge_set_query_interval(struct device *dev, const char *val)
354 {
355 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
356 dev->ifname, val);
357 }
358
359 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
360 {
361 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
362 dev->ifname, val);
363 }
364
365 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
366 {
367 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
368 dev->ifname, val);
369 }
370
371 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
372 {
373 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
374 dev->ifname, val);
375 }
376
377 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
378 {
379 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
380 dev->ifname, val);
381 }
382
383 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
384 {
385 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
386 dev->ifname, val);
387 }
388
389 static void system_bridge_set_learning(struct device *dev, const char *val)
390 {
391 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
392 }
393
394 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
395 {
396 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
397 }
398
399 static void system_set_sendredirects(struct device *dev, const char *val)
400 {
401 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
402 }
403
404 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
405 {
406 int fd = -1, ret = -1;
407
408 fd = open(path, O_RDONLY);
409 if (fd < 0)
410 goto out;
411
412 ssize_t len = read(fd, buf, buf_sz - 1);
413 if (len < 0)
414 goto out;
415
416 ret = buf[len] = 0;
417
418 out:
419 if (fd >= 0)
420 close(fd);
421
422 return ret;
423 }
424
425 static int
426 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
427 {
428 snprintf(dev_buf, sizeof(dev_buf), path, device);
429 return system_get_sysctl(dev_buf, buf, buf_sz);
430 }
431
432 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
433 {
434 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
435 dev->ifname, buf, buf_sz);
436 }
437
438 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
439 {
440 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
441 dev->ifname, buf, buf_sz);
442 }
443
444 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
445 {
446 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
447 dev->ifname, buf, buf_sz);
448 }
449
450 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
451 {
452 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
453 dev->ifname, buf, buf_sz);
454 }
455
456 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
457 {
458 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
459 dev->ifname, buf, buf_sz);
460 }
461
462 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
463 {
464 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
465 dev->ifname, buf, buf_sz);
466 }
467
468 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
469 {
470 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
471 dev->ifname, buf, buf_sz);
472 }
473
474 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
475 {
476 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
477 dev->ifname, buf, buf_sz);
478 }
479
480 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
481 {
482 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
483 dev->ifname, buf, buf_sz);
484 }
485
486 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
487 {
488 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
489 dev->ifname, buf, buf_sz);
490 }
491
492 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
493 {
494 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
495 dev->ifname, buf, buf_sz);
496 }
497
498 // Evaluate netlink messages
499 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
500 {
501 struct nlmsghdr *nh = nlmsg_hdr(msg);
502 struct nlattr *nla[__IFLA_MAX];
503 int link_state = 0;
504 char buf[10];
505
506 if (nh->nlmsg_type != RTM_NEWLINK)
507 goto out;
508
509 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
510 if (!nla[IFLA_IFNAME])
511 goto out;
512
513 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
514 if (!dev)
515 goto out;
516
517 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
518 link_state = strtoul(buf, NULL, 0);
519
520 device_set_link(dev, link_state ? true : false);
521
522 out:
523 return 0;
524 }
525
526 static void
527 handle_hotplug_msg(char *data, int size)
528 {
529 const char *subsystem = NULL, *interface = NULL;
530 char *cur, *end, *sep;
531 struct device *dev;
532 int skip;
533 bool add;
534
535 if (!strncmp(data, "add@", 4))
536 add = true;
537 else if (!strncmp(data, "remove@", 7))
538 add = false;
539 else
540 return;
541
542 skip = strlen(data) + 1;
543 end = data + size;
544
545 for (cur = data + skip; cur < end; cur += skip) {
546 skip = strlen(cur) + 1;
547
548 sep = strchr(cur, '=');
549 if (!sep)
550 continue;
551
552 *sep = 0;
553 if (!strcmp(cur, "INTERFACE"))
554 interface = sep + 1;
555 else if (!strcmp(cur, "SUBSYSTEM")) {
556 subsystem = sep + 1;
557 if (strcmp(subsystem, "net") != 0)
558 return;
559 }
560 if (subsystem && interface)
561 goto found;
562 }
563 return;
564
565 found:
566 dev = device_find(interface);
567 if (!dev)
568 return;
569
570 if (dev->type != &simple_device_type)
571 return;
572
573 if (add && system_if_force_external(dev->ifname))
574 return;
575
576 device_set_present(dev, add);
577 }
578
579 static void
580 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
581 {
582 struct event_socket *ev = container_of(u, struct event_socket, uloop);
583 struct sockaddr_nl nla;
584 unsigned char *buf = NULL;
585 int size;
586
587 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
588 if (nla.nl_pid == 0)
589 handle_hotplug_msg((char *) buf, size);
590
591 free(buf);
592 }
593 }
594
595 static int system_rtnl_call(struct nl_msg *msg)
596 {
597 int ret;
598
599 ret = nl_send_auto_complete(sock_rtnl, msg);
600 nlmsg_free(msg);
601
602 if (ret < 0)
603 return ret;
604
605 return nl_wait_for_ack(sock_rtnl);
606 }
607
608 int system_bridge_delbr(struct device *bridge)
609 {
610 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
611 }
612
613 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
614 {
615 struct ifreq ifr;
616
617 memset(&ifr, 0, sizeof(ifr));
618 if (dev)
619 ifr.ifr_ifindex = dev->ifindex;
620 else
621 ifr.ifr_data = data;
622 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name));
623 return ioctl(sock_ioctl, cmd, &ifr);
624 }
625
626 static bool system_is_bridge(const char *name, char *buf, int buflen)
627 {
628 struct stat st;
629
630 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
631 if (stat(buf, &st) < 0)
632 return false;
633
634 return true;
635 }
636
637 static char *system_get_bridge(const char *name, char *buf, int buflen)
638 {
639 char *path;
640 ssize_t len = -1;
641 glob_t gl;
642
643 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
644 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
645 return NULL;
646
647 if (gl.gl_pathc > 0)
648 len = readlink(gl.gl_pathv[0], buf, buflen);
649
650 globfree(&gl);
651
652 if (len < 0)
653 return NULL;
654
655 buf[len] = 0;
656 path = strrchr(buf, '/');
657 if (!path)
658 return NULL;
659
660 return path + 1;
661 }
662
663 static void
664 system_bridge_set_wireless(struct device *bridge, struct device *dev)
665 {
666 bool mcast_to_ucast = dev->wireless_ap;
667 bool hairpin = true;
668
669 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
670 !bridge->settings.multicast_to_unicast)
671 mcast_to_ucast = false;
672
673 if (!mcast_to_ucast || dev->wireless_isolate)
674 hairpin = false;
675
676 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
677 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
678 }
679
680 int system_bridge_addif(struct device *bridge, struct device *dev)
681 {
682 char buf[64];
683 char *oldbr;
684 int ret = 0;
685
686 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
687 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
688 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
689
690 if (dev->wireless)
691 system_bridge_set_wireless(bridge, dev);
692
693 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
694 snprintf(buf, sizeof(buf), "%i", dev->settings.multicast_router);
695 system_bridge_set_multicast_router(dev, buf, false);
696 }
697
698 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
699 dev->settings.multicast_fast_leave)
700 system_bridge_set_multicast_fast_leave(dev, "1");
701
702 if (dev->settings.flags & DEV_OPT_LEARNING &&
703 !dev->settings.learning)
704 system_bridge_set_learning(dev, "0");
705
706 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
707 !dev->settings.unicast_flood)
708 system_bridge_set_unicast_flood(dev, "0");
709
710 return ret;
711 }
712
713 int system_bridge_delif(struct device *bridge, struct device *dev)
714 {
715 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
716 }
717
718 int system_if_resolve(struct device *dev)
719 {
720 struct ifreq ifr;
721 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
722 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
723 return ifr.ifr_ifindex;
724 else
725 return 0;
726 }
727
728 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
729 {
730 struct ifreq ifr;
731
732 memset(&ifr, 0, sizeof(ifr));
733 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
734 ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr);
735 ifr.ifr_flags |= add;
736 ifr.ifr_flags &= ~rem;
737 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
738 }
739
740 struct clear_data {
741 struct nl_msg *msg;
742 struct device *dev;
743 int type;
744 int size;
745 int af;
746 };
747
748
749 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
750 {
751 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
752
753 return ifa->ifa_index == ifindex;
754 }
755
756 static bool check_route(struct nlmsghdr *hdr, int ifindex)
757 {
758 struct rtmsg *r = NLMSG_DATA(hdr);
759 struct nlattr *tb[__RTA_MAX];
760
761 if (r->rtm_protocol == RTPROT_KERNEL &&
762 r->rtm_family == AF_INET6)
763 return false;
764
765 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
766 if (!tb[RTA_OIF])
767 return false;
768
769 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
770 }
771
772 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
773 {
774 return true;
775 }
776
777 static int cb_clear_event(struct nl_msg *msg, void *arg)
778 {
779 struct clear_data *clr = arg;
780 struct nlmsghdr *hdr = nlmsg_hdr(msg);
781 bool (*cb)(struct nlmsghdr *, int ifindex);
782 int type;
783
784 switch(clr->type) {
785 case RTM_GETADDR:
786 type = RTM_DELADDR;
787 if (hdr->nlmsg_type != RTM_NEWADDR)
788 return NL_SKIP;
789
790 cb = check_ifaddr;
791 break;
792 case RTM_GETROUTE:
793 type = RTM_DELROUTE;
794 if (hdr->nlmsg_type != RTM_NEWROUTE)
795 return NL_SKIP;
796
797 cb = check_route;
798 break;
799 case RTM_GETRULE:
800 type = RTM_DELRULE;
801 if (hdr->nlmsg_type != RTM_NEWRULE)
802 return NL_SKIP;
803
804 cb = check_rule;
805 break;
806 default:
807 return NL_SKIP;
808 }
809
810 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
811 return NL_SKIP;
812
813 if (type == RTM_DELRULE)
814 D(SYSTEM, "Remove a rule\n");
815 else
816 D(SYSTEM, "Remove %s from device %s\n",
817 type == RTM_DELADDR ? "an address" : "a route",
818 clr->dev->ifname);
819 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
820 hdr = nlmsg_hdr(clr->msg);
821 hdr->nlmsg_type = type;
822 hdr->nlmsg_flags = NLM_F_REQUEST;
823
824 nl_socket_disable_auto_ack(sock_rtnl);
825 nl_send_auto_complete(sock_rtnl, clr->msg);
826 nl_socket_enable_auto_ack(sock_rtnl);
827
828 return NL_SKIP;
829 }
830
831 static int
832 cb_finish_event(struct nl_msg *msg, void *arg)
833 {
834 int *pending = arg;
835 *pending = 0;
836 return NL_STOP;
837 }
838
839 static int
840 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
841 {
842 int *pending = arg;
843 *pending = err->error;
844 return NL_STOP;
845 }
846
847 static void
848 system_if_clear_entries(struct device *dev, int type, int af)
849 {
850 struct clear_data clr;
851 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
852 struct rtmsg rtm = {
853 .rtm_family = af,
854 .rtm_flags = RTM_F_CLONED,
855 };
856 int flags = NLM_F_DUMP;
857 int pending = 1;
858
859 clr.af = af;
860 clr.dev = dev;
861 clr.type = type;
862 switch (type) {
863 case RTM_GETADDR:
864 case RTM_GETRULE:
865 clr.size = sizeof(struct rtgenmsg);
866 break;
867 case RTM_GETROUTE:
868 clr.size = sizeof(struct rtmsg);
869 break;
870 default:
871 return;
872 }
873
874 if (!cb)
875 return;
876
877 clr.msg = nlmsg_alloc_simple(type, flags);
878 if (!clr.msg)
879 goto out;
880
881 nlmsg_append(clr.msg, &rtm, clr.size, 0);
882 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
883 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
884 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
885
886 nl_send_auto_complete(sock_rtnl, clr.msg);
887 while (pending > 0)
888 nl_recvmsgs(sock_rtnl, cb);
889
890 nlmsg_free(clr.msg);
891 out:
892 nl_cb_put(cb);
893 }
894
895 /*
896 * Clear bridge (membership) state and bring down device
897 */
898 void system_if_clear_state(struct device *dev)
899 {
900 static char buf[256];
901 char *bridge;
902
903 device_set_ifindex(dev, system_if_resolve(dev));
904 if (dev->external || !dev->ifindex)
905 return;
906
907 system_if_flags(dev->ifname, 0, IFF_UP);
908
909 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
910 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
911 system_bridge_delbr(dev);
912 return;
913 }
914
915 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
916 if (bridge) {
917 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
918 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
919 }
920
921 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
922 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
923 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
924 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
925 system_set_disable_ipv6(dev, "0");
926 }
927
928 static inline unsigned long
929 sec_to_jiffies(int val)
930 {
931 return (unsigned long) val * 100;
932 }
933
934 static void system_bridge_conf_multicast_deps(struct device *bridge,
935 struct bridge_config *cfg,
936 char *buf,
937 int buf_len)
938 {
939 int val;
940
941 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
942 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
943 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
944 val = cfg->robustness * cfg->query_interval +
945 cfg->query_response_interval;
946
947 snprintf(buf, buf_len, "%i", val);
948 system_bridge_set_membership_interval(bridge, buf);
949
950 val = cfg->robustness * cfg->query_interval +
951 cfg->query_response_interval / 2;
952
953 snprintf(buf, buf_len, "%i", val);
954 system_bridge_set_other_querier_timeout(bridge, buf);
955 }
956
957 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
958 val = cfg->query_interval / 4;
959
960 snprintf(buf, buf_len, "%i", val);
961 system_bridge_set_startup_query_interval(bridge, buf);
962 }
963 }
964
965 static void system_bridge_conf_multicast(struct device *bridge,
966 struct bridge_config *cfg,
967 char *buf,
968 int buf_len)
969 {
970 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
971 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
972
973 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
974 bridge->ifname, cfg->multicast_querier ? "1" : "0");
975
976 snprintf(buf, buf_len, "%i", cfg->hash_max);
977 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
978 bridge->ifname, buf);
979
980 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
981 snprintf(buf, buf_len, "%i", bridge->settings.multicast_router);
982 system_bridge_set_multicast_router(bridge, buf, true);
983 }
984
985 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
986 snprintf(buf, buf_len, "%i", cfg->robustness);
987 system_bridge_set_robustness(bridge, buf);
988 }
989
990 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
991 snprintf(buf, buf_len, "%i", cfg->query_interval);
992 system_bridge_set_query_interval(bridge, buf);
993 }
994
995 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
996 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
997 system_bridge_set_query_response_interval(bridge, buf);
998 }
999
1000 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1001 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1002 system_bridge_set_last_member_interval(bridge, buf);
1003 }
1004
1005 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1006 }
1007
1008 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1009 {
1010 char buf[64];
1011 unsigned long args[4] = {};
1012
1013 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1014 return -1;
1015
1016 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1017 args[1] = !!cfg->stp;
1018 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1019
1020 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1021 args[1] = sec_to_jiffies(cfg->forward_delay);
1022 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1023
1024 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1025
1026 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1027 args[1] = cfg->priority;
1028 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1029
1030 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1031 args[0] = BRCTL_SET_AGEING_TIME;
1032 args[1] = sec_to_jiffies(cfg->ageing_time);
1033 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1034 }
1035
1036 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1037 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1038 args[1] = sec_to_jiffies(cfg->hello_time);
1039 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1040 }
1041
1042 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1043 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1044 args[1] = sec_to_jiffies(cfg->max_age);
1045 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1046 }
1047
1048 return 0;
1049 }
1050
1051 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1052 {
1053 struct nl_msg *msg;
1054 struct nlattr *linkinfo, *data;
1055 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1056 int i, rv;
1057 static const struct {
1058 const char *name;
1059 enum macvlan_mode val;
1060 } modes[] = {
1061 { "private", MACVLAN_MODE_PRIVATE },
1062 { "vepa", MACVLAN_MODE_VEPA },
1063 { "bridge", MACVLAN_MODE_BRIDGE },
1064 { "passthru", MACVLAN_MODE_PASSTHRU },
1065 };
1066
1067 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1068
1069 if (!msg)
1070 return -1;
1071
1072 nlmsg_append(msg, &iim, sizeof(iim), 0);
1073
1074 if (cfg->flags & MACVLAN_OPT_MACADDR)
1075 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1076 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1077 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1078
1079 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1080 goto nla_put_failure;
1081
1082 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1083
1084 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1085 goto nla_put_failure;
1086
1087 if (cfg->mode) {
1088 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1089 if (strcmp(cfg->mode, modes[i].name) != 0)
1090 continue;
1091
1092 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1093 break;
1094 }
1095 }
1096
1097 nla_nest_end(msg, data);
1098 nla_nest_end(msg, linkinfo);
1099
1100 rv = system_rtnl_call(msg);
1101 if (rv)
1102 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1103
1104 return rv;
1105
1106 nla_put_failure:
1107 nlmsg_free(msg);
1108 return -ENOMEM;
1109 }
1110
1111 static int system_link_del(const char *ifname)
1112 {
1113 struct nl_msg *msg;
1114 struct ifinfomsg iim = {
1115 .ifi_family = AF_UNSPEC,
1116 .ifi_index = 0,
1117 };
1118
1119 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1120
1121 if (!msg)
1122 return -1;
1123
1124 nlmsg_append(msg, &iim, sizeof(iim), 0);
1125 nla_put_string(msg, IFLA_IFNAME, ifname);
1126 return system_rtnl_call(msg);
1127 }
1128
1129 int system_macvlan_del(struct device *macvlan)
1130 {
1131 return system_link_del(macvlan->ifname);
1132 }
1133
1134 static int system_vlan(struct device *dev, int id)
1135 {
1136 struct vlan_ioctl_args ifr = {
1137 .cmd = SET_VLAN_NAME_TYPE_CMD,
1138 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1139 };
1140
1141 ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1142
1143 if (id < 0) {
1144 ifr.cmd = DEL_VLAN_CMD;
1145 ifr.u.VID = 0;
1146 } else {
1147 ifr.cmd = ADD_VLAN_CMD;
1148 ifr.u.VID = id;
1149 }
1150 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1151 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1152 }
1153
1154 int system_vlan_add(struct device *dev, int id)
1155 {
1156 return system_vlan(dev, id);
1157 }
1158
1159 int system_vlan_del(struct device *dev)
1160 {
1161 return system_vlan(dev, -1);
1162 }
1163
1164 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1165 {
1166 struct nl_msg *msg;
1167 struct nlattr *linkinfo, *data;
1168 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1169 int rv;
1170
1171 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1172
1173 if (!msg)
1174 return -1;
1175
1176 nlmsg_append(msg, &iim, sizeof(iim), 0);
1177 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1178 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1179
1180 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1181 goto nla_put_failure;
1182
1183 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1184
1185 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1186 goto nla_put_failure;
1187
1188 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1189
1190 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1191 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1192 #else
1193 if(cfg->proto == VLAN_PROTO_8021AD)
1194 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);
1195 #endif
1196
1197 nla_nest_end(msg, data);
1198 nla_nest_end(msg, linkinfo);
1199
1200 rv = system_rtnl_call(msg);
1201 if (rv)
1202 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1203
1204 return rv;
1205
1206 nla_put_failure:
1207 nlmsg_free(msg);
1208 return -ENOMEM;
1209 }
1210
1211 int system_vlandev_del(struct device *vlandev)
1212 {
1213 return system_link_del(vlandev->ifname);
1214 }
1215
1216 void
1217 system_if_get_settings(struct device *dev, struct device_settings *s)
1218 {
1219 struct ifreq ifr;
1220 char buf[10];
1221
1222 memset(&ifr, 0, sizeof(ifr));
1223 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1224
1225 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1226 s->mtu = ifr.ifr_mtu;
1227 s->flags |= DEV_OPT_MTU;
1228 }
1229
1230 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1231 if (s->mtu6 > 0)
1232 s->flags |= DEV_OPT_MTU6;
1233
1234 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1235 s->txqueuelen = ifr.ifr_qlen;
1236 s->flags |= DEV_OPT_TXQUEUELEN;
1237 }
1238
1239 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1240 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1241 s->flags |= DEV_OPT_MACADDR;
1242 }
1243
1244 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1245 s->ipv6 = !strtoul(buf, NULL, 0);
1246 s->flags |= DEV_OPT_IPV6;
1247 }
1248
1249 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1250 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1251 s->flags |= DEV_OPT_PROMISC;
1252
1253 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1254 s->flags |= DEV_OPT_MULTICAST;
1255 }
1256
1257 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1258 s->rpfilter = strtoul(buf, NULL, 0);
1259 s->flags |= DEV_OPT_RPFILTER;
1260 }
1261
1262 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1263 s->acceptlocal = strtoul(buf, NULL, 0);
1264 s->flags |= DEV_OPT_ACCEPTLOCAL;
1265 }
1266
1267 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1268 s->igmpversion = strtoul(buf, NULL, 0);
1269 s->flags |= DEV_OPT_IGMPVERSION;
1270 }
1271
1272 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1273 s->mldversion = strtoul(buf, NULL, 0);
1274 s->flags |= DEV_OPT_MLDVERSION;
1275 }
1276
1277 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1278 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1279 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1280 }
1281
1282 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1283 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1284 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1285 }
1286
1287 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1288 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1289 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1290 }
1291
1292 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1293 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1294 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1295 }
1296
1297 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1298 s->dadtransmits = strtoul(buf, NULL, 0);
1299 s->flags |= DEV_OPT_DADTRANSMITS;
1300 }
1301
1302 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1303 s->sendredirects = strtoul(buf, NULL, 0);
1304 s->flags |= DEV_OPT_SENDREDIRECTS;
1305 }
1306 }
1307
1308 static void
1309 system_if_set_rps_xps_val(const char *path, int val)
1310 {
1311 char val_buf[8];
1312 glob_t gl;
1313 int i;
1314
1315 if (glob(path, 0, NULL, &gl))
1316 return;
1317
1318 snprintf(val_buf, sizeof(val_buf), "%x", val);
1319 for (i = 0; i < gl.gl_pathc; i++)
1320 system_set_sysctl(gl.gl_pathv[i], val_buf);
1321
1322 globfree(&gl);
1323 }
1324
1325 static void
1326 system_if_apply_rps_xps(struct device *dev, struct device_settings *s)
1327 {
1328 long n_cpus = sysconf(_SC_NPROCESSORS_ONLN);
1329 int val;
1330
1331 if (n_cpus < 2)
1332 return;
1333
1334 val = (1 << n_cpus) - 1;
1335 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/rps_cpus", dev->ifname);
1336 system_if_set_rps_xps_val(dev_buf, s->rps ? val : 0);
1337
1338 snprintf(dev_buf, sizeof(dev_buf), "/sys/class/net/%s/queues/*/xps_cpus", dev->ifname);
1339 system_if_set_rps_xps_val(dev_buf, s->xps ? val : 0);
1340 }
1341
1342 void
1343 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1344 {
1345 struct ifreq ifr;
1346 char buf[12];
1347
1348 memset(&ifr, 0, sizeof(ifr));
1349 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name));
1350 if (s->flags & DEV_OPT_MTU & apply_mask) {
1351 ifr.ifr_mtu = s->mtu;
1352 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1353 s->flags &= ~DEV_OPT_MTU;
1354 }
1355 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1356 system_update_ipv6_mtu(dev, s->mtu6);
1357 }
1358 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1359 ifr.ifr_qlen = s->txqueuelen;
1360 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1361 s->flags &= ~DEV_OPT_TXQUEUELEN;
1362 }
1363 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1364 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1365 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1366 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1367 s->flags &= ~DEV_OPT_MACADDR;
1368 }
1369 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1370 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1371 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1372 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1373 !s->promisc ? IFF_PROMISC : 0) < 0)
1374 s->flags &= ~DEV_OPT_PROMISC;
1375 }
1376 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1377 snprintf(buf, sizeof(buf), "%d", s->rpfilter);
1378 system_set_rpfilter(dev, buf);
1379 }
1380 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1381 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1382 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1383 snprintf(buf, sizeof(buf), "%d", s->igmpversion);
1384 system_set_igmpversion(dev, buf);
1385 }
1386 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1387 snprintf(buf, sizeof(buf), "%d", s->mldversion);
1388 system_set_mldversion(dev, buf);
1389 }
1390 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1391 snprintf(buf, sizeof(buf), "%d", s->neigh4reachabletime);
1392 system_set_neigh4reachabletime(dev, buf);
1393 snprintf(buf, sizeof(buf), "%d", s->neigh6reachabletime);
1394 system_set_neigh6reachabletime(dev, buf);
1395 }
1396 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1397 snprintf(buf, sizeof(buf), "%d", s->neigh4gcstaletime);
1398 system_set_neigh4gcstaletime(dev, buf);
1399 snprintf(buf, sizeof(buf), "%d", s->neigh6gcstaletime);
1400 system_set_neigh6gcstaletime(dev, buf);
1401 }
1402 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1403 snprintf(buf, sizeof(buf), "%d", s->dadtransmits);
1404 system_set_dadtransmits(dev, buf);
1405 }
1406 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1407 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1408 !s->multicast ? IFF_MULTICAST : 0) < 0)
1409 s->flags &= ~DEV_OPT_MULTICAST;
1410 }
1411 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1412 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1413
1414 system_if_apply_rps_xps(dev, s);
1415 }
1416
1417 int system_if_up(struct device *dev)
1418 {
1419 system_if_get_settings(dev, &dev->orig_settings);
1420 /* Only keep orig settings based on what needs to be set */
1421 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1422 dev->orig_settings.flags &= dev->settings.flags;
1423 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1424 return system_if_flags(dev->ifname, IFF_UP, 0);
1425 }
1426
1427 int system_if_down(struct device *dev)
1428 {
1429 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1430 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1431 return ret;
1432 }
1433
1434 struct if_check_data {
1435 struct device *dev;
1436 int pending;
1437 int ret;
1438 };
1439
1440 #ifndef IFF_LOWER_UP
1441 #define IFF_LOWER_UP 0x10000
1442 #endif
1443
1444 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1445 {
1446 struct nlmsghdr *nh = nlmsg_hdr(msg);
1447 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1448 struct if_check_data *chk = (struct if_check_data *)arg;
1449
1450 if (nh->nlmsg_type != RTM_NEWLINK)
1451 return NL_SKIP;
1452
1453 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1454 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1455
1456 return NL_OK;
1457 }
1458
1459 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1460 {
1461 struct if_check_data *chk = (struct if_check_data *)arg;
1462 chk->pending = 0;
1463 return NL_STOP;
1464 }
1465
1466 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1467 {
1468 struct if_check_data *chk = (struct if_check_data *)arg;
1469
1470 device_set_present(chk->dev, false);
1471 device_set_link(chk->dev, false);
1472 chk->pending = err->error;
1473
1474 return NL_STOP;
1475 }
1476
1477 int system_if_check(struct device *dev)
1478 {
1479 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1480 struct nl_msg *msg;
1481 struct ifinfomsg ifi = {
1482 .ifi_family = AF_UNSPEC,
1483 .ifi_index = 0,
1484 };
1485 struct if_check_data chk = {
1486 .dev = dev,
1487 .pending = 1,
1488 };
1489 int ret = 1;
1490
1491 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1492 if (!msg)
1493 goto out;
1494
1495 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1496 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1497 goto free;
1498
1499 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1500 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1501 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1502
1503 nl_send_auto_complete(sock_rtnl, msg);
1504 while (chk.pending > 0)
1505 nl_recvmsgs(sock_rtnl, cb);
1506
1507 ret = chk.pending;
1508
1509 free:
1510 nlmsg_free(msg);
1511 out:
1512 nl_cb_put(cb);
1513 return ret;
1514 }
1515
1516 struct device *
1517 system_if_get_parent(struct device *dev)
1518 {
1519 char buf[64], *devname;
1520 int ifindex, iflink, len;
1521 FILE *f;
1522
1523 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1524 f = fopen(buf, "r");
1525 if (!f)
1526 return NULL;
1527
1528 len = fread(buf, 1, sizeof(buf) - 1, f);
1529 fclose(f);
1530
1531 if (len <= 0)
1532 return NULL;
1533
1534 buf[len] = 0;
1535 iflink = strtoul(buf, NULL, 0);
1536 ifindex = system_if_resolve(dev);
1537 if (!iflink || iflink == ifindex)
1538 return NULL;
1539
1540 devname = if_indextoname(iflink, buf);
1541 if (!devname)
1542 return NULL;
1543
1544 return device_get(devname, true);
1545 }
1546
1547 static bool
1548 read_string_file(int dir_fd, const char *file, char *buf, int len)
1549 {
1550 bool ret = false;
1551 char *c;
1552 int fd;
1553
1554 fd = openat(dir_fd, file, O_RDONLY);
1555 if (fd < 0)
1556 return false;
1557
1558 retry:
1559 len = read(fd, buf, len - 1);
1560 if (len < 0) {
1561 if (errno == EINTR)
1562 goto retry;
1563 } else if (len > 0) {
1564 buf[len] = 0;
1565
1566 c = strchr(buf, '\n');
1567 if (c)
1568 *c = 0;
1569
1570 ret = true;
1571 }
1572
1573 close(fd);
1574
1575 return ret;
1576 }
1577
1578 static bool
1579 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1580 {
1581 char buf[64];
1582 bool ret = false;
1583
1584 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1585 if (ret)
1586 *val = strtoull(buf, NULL, 0);
1587
1588 return ret;
1589 }
1590
1591 /* Assume advertised flags == supported flags */
1592 static const struct {
1593 uint32_t mask;
1594 const char *name;
1595 } ethtool_link_modes[] = {
1596 { ADVERTISED_10baseT_Half, "10H" },
1597 { ADVERTISED_10baseT_Full, "10F" },
1598 { ADVERTISED_100baseT_Half, "100H" },
1599 { ADVERTISED_100baseT_Full, "100F" },
1600 { ADVERTISED_1000baseT_Half, "1000H" },
1601 { ADVERTISED_1000baseT_Full, "1000F" },
1602 };
1603
1604 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1605 {
1606 int i;
1607 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1608 if (mask & ethtool_link_modes[i].mask)
1609 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1610 }
1611 }
1612
1613 bool
1614 system_if_force_external(const char *ifname)
1615 {
1616 char buf[64];
1617 struct stat s;
1618
1619 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1620 return stat(buf, &s) == 0;
1621 }
1622
1623 int
1624 system_if_dump_info(struct device *dev, struct blob_buf *b)
1625 {
1626 struct ethtool_cmd ecmd;
1627 struct ifreq ifr;
1628 char buf[64], *s;
1629 void *c;
1630 int dir_fd;
1631
1632 snprintf(buf, sizeof(buf), "/sys/class/net/%s", dev->ifname);
1633 dir_fd = open(buf, O_DIRECTORY);
1634
1635 memset(&ecmd, 0, sizeof(ecmd));
1636 memset(&ifr, 0, sizeof(ifr));
1637 strcpy(ifr.ifr_name, dev->ifname);
1638 ifr.ifr_data = (caddr_t) &ecmd;
1639 ecmd.cmd = ETHTOOL_GSET;
1640
1641 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1642 c = blobmsg_open_array(b, "link-advertising");
1643 system_add_link_modes(b, ecmd.advertising);
1644 blobmsg_close_array(b, c);
1645
1646 c = blobmsg_open_array(b, "link-supported");
1647 system_add_link_modes(b, ecmd.supported);
1648 blobmsg_close_array(b, c);
1649
1650 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1651 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1652 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1653 blobmsg_add_string_buffer(b);
1654 }
1655
1656 close(dir_fd);
1657 return 0;
1658 }
1659
1660 int
1661 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1662 {
1663 const char *const counters[] = {
1664 "collisions", "rx_frame_errors", "tx_compressed",
1665 "multicast", "rx_length_errors", "tx_dropped",
1666 "rx_bytes", "rx_missed_errors", "tx_errors",
1667 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1668 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1669 "rx_dropped", "tx_aborted_errors", "tx_packets",
1670 "rx_errors", "tx_bytes", "tx_window_errors",
1671 "rx_fifo_errors", "tx_carrier_errors",
1672 };
1673 char buf[64];
1674 int stats_dir;
1675 int i;
1676 uint64_t val = 0;
1677
1678 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1679 stats_dir = open(buf, O_DIRECTORY);
1680 if (stats_dir < 0)
1681 return -1;
1682
1683 for (i = 0; i < ARRAY_SIZE(counters); i++)
1684 if (read_uint64_file(stats_dir, counters[i], &val))
1685 blobmsg_add_u64(b, counters[i], val);
1686
1687 close(stats_dir);
1688 return 0;
1689 }
1690
1691 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1692 {
1693 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1694 int alen = v4 ? 4 : 16;
1695 unsigned int flags = 0;
1696 struct ifaddrmsg ifa = {
1697 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1698 .ifa_prefixlen = addr->mask,
1699 .ifa_index = dev->ifindex,
1700 };
1701
1702 struct nl_msg *msg;
1703 if (cmd == RTM_NEWADDR)
1704 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1705
1706 msg = nlmsg_alloc_simple(cmd, flags);
1707 if (!msg)
1708 return -1;
1709
1710 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1711 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1712 if (v4) {
1713 if (addr->broadcast)
1714 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1715 if (addr->point_to_point)
1716 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1717 } else {
1718 time_t now = system_get_rtime();
1719 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1720
1721 if (addr->preferred_until) {
1722 int64_t preferred = addr->preferred_until - now;
1723 if (preferred < 0)
1724 preferred = 0;
1725 else if (preferred > UINT32_MAX)
1726 preferred = UINT32_MAX;
1727
1728 cinfo.ifa_prefered = preferred;
1729 }
1730
1731 if (addr->valid_until) {
1732 int64_t valid = addr->valid_until - now;
1733 if (valid <= 0) {
1734 nlmsg_free(msg);
1735 return -1;
1736 }
1737 else if (valid > UINT32_MAX)
1738 valid = UINT32_MAX;
1739
1740 cinfo.ifa_valid = valid;
1741 }
1742
1743 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1744
1745 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1746 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1747 }
1748
1749 return system_rtnl_call(msg);
1750 }
1751
1752 int system_add_address(struct device *dev, struct device_addr *addr)
1753 {
1754 return system_addr(dev, addr, RTM_NEWADDR);
1755 }
1756
1757 int system_del_address(struct device *dev, struct device_addr *addr)
1758 {
1759 return system_addr(dev, addr, RTM_DELADDR);
1760 }
1761
1762 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1763 {
1764 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1765 bool have_gw;
1766 unsigned int flags = 0;
1767
1768 if (alen == 4)
1769 have_gw = !!route->nexthop.in.s_addr;
1770 else
1771 have_gw = route->nexthop.in6.s6_addr32[0] ||
1772 route->nexthop.in6.s6_addr32[1] ||
1773 route->nexthop.in6.s6_addr32[2] ||
1774 route->nexthop.in6.s6_addr32[3];
1775
1776 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1777 ? route->table : RT_TABLE_MAIN;
1778
1779 struct rtmsg rtm = {
1780 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1781 .rtm_dst_len = route->mask,
1782 .rtm_src_len = route->sourcemask,
1783 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1784 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1785 .rtm_scope = RT_SCOPE_NOWHERE,
1786 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1787 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1788 };
1789 struct nl_msg *msg;
1790
1791 if (cmd == RTM_NEWROUTE) {
1792 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1793
1794 if (!dev) { // Add null-route
1795 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1796 rtm.rtm_type = RTN_UNREACHABLE;
1797 }
1798 else
1799 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1800 }
1801
1802 if (route->flags & DEVROUTE_TYPE) {
1803 rtm.rtm_type = route->type;
1804 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1805 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1806 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1807 rtm.rtm_table = RT_TABLE_LOCAL;
1808 }
1809
1810 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1811 rtm.rtm_scope = RT_SCOPE_HOST;
1812 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1813 rtm.rtm_type == RTN_ANYCAST) {
1814 rtm.rtm_scope = RT_SCOPE_LINK;
1815 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1816 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY) {
1817 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1818 dev = NULL;
1819 }
1820 }
1821
1822 msg = nlmsg_alloc_simple(cmd, flags);
1823 if (!msg)
1824 return -1;
1825
1826 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1827
1828 if (route->mask)
1829 nla_put(msg, RTA_DST, alen, &route->addr);
1830
1831 if (route->sourcemask) {
1832 if (rtm.rtm_family == AF_INET)
1833 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1834 else
1835 nla_put(msg, RTA_SRC, alen, &route->source);
1836 }
1837
1838 if (route->metric > 0)
1839 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1840
1841 if (have_gw)
1842 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1843
1844 if (dev)
1845 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1846
1847 if (table >= 256)
1848 nla_put_u32(msg, RTA_TABLE, table);
1849
1850 if (route->flags & DEVROUTE_MTU) {
1851 struct nlattr *metrics;
1852
1853 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1854 goto nla_put_failure;
1855
1856 nla_put_u32(msg, RTAX_MTU, route->mtu);
1857
1858 nla_nest_end(msg, metrics);
1859 }
1860
1861 return system_rtnl_call(msg);
1862
1863 nla_put_failure:
1864 nlmsg_free(msg);
1865 return -ENOMEM;
1866 }
1867
1868 int system_add_route(struct device *dev, struct device_route *route)
1869 {
1870 return system_rt(dev, route, RTM_NEWROUTE);
1871 }
1872
1873 int system_del_route(struct device *dev, struct device_route *route)
1874 {
1875 return system_rt(dev, route, RTM_DELROUTE);
1876 }
1877
1878 int system_flush_routes(void)
1879 {
1880 const char *names[] = {
1881 "/proc/sys/net/ipv4/route/flush",
1882 "/proc/sys/net/ipv6/route/flush"
1883 };
1884 int fd, i;
1885
1886 for (i = 0; i < ARRAY_SIZE(names); i++) {
1887 fd = open(names[i], O_WRONLY);
1888 if (fd < 0)
1889 continue;
1890
1891 if (write(fd, "-1", 2)) {}
1892 close(fd);
1893 }
1894 return 0;
1895 }
1896
1897 bool system_resolve_rt_type(const char *type, unsigned int *id)
1898 {
1899 return system_rtn_aton(type, id);
1900 }
1901
1902 bool system_resolve_rt_proto(const char *type, unsigned int *id)
1903 {
1904 FILE *f;
1905 char *e, buf[128];
1906 unsigned int n, proto = 256;
1907
1908 if ((n = strtoul(type, &e, 0)) >= 0 && !*e && e != type)
1909 proto = n;
1910 else if (!strcmp(type, "unspec"))
1911 proto = RTPROT_UNSPEC;
1912 else if (!strcmp(type, "kernel"))
1913 proto = RTPROT_KERNEL;
1914 else if (!strcmp(type, "boot"))
1915 proto = RTPROT_BOOT;
1916 else if (!strcmp(type, "static"))
1917 proto = RTPROT_STATIC;
1918 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
1919 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
1920 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
1921 continue;
1922
1923 n = strtoul(e, NULL, 10);
1924 e = strtok(NULL, " \t\n");
1925
1926 if (e && !strcmp(e, type)) {
1927 proto = n;
1928 break;
1929 }
1930 }
1931 fclose(f);
1932 }
1933
1934 if (proto > 255)
1935 return false;
1936
1937 *id = proto;
1938 return true;
1939 }
1940
1941 bool system_resolve_rt_table(const char *name, unsigned int *id)
1942 {
1943 FILE *f;
1944 char *e, buf[128];
1945 unsigned int n, table = RT_TABLE_UNSPEC;
1946
1947 /* first try to parse table as number */
1948 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
1949 table = n;
1950
1951 /* handle well known aliases */
1952 else if (!strcmp(name, "default"))
1953 table = RT_TABLE_DEFAULT;
1954 else if (!strcmp(name, "main"))
1955 table = RT_TABLE_MAIN;
1956 else if (!strcmp(name, "local"))
1957 table = RT_TABLE_LOCAL;
1958
1959 /* try to look up name in /etc/iproute2/rt_tables */
1960 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
1961 {
1962 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
1963 {
1964 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
1965 continue;
1966
1967 n = strtoul(e, NULL, 10);
1968 e = strtok(NULL, " \t\n");
1969
1970 if (e && !strcmp(e, name))
1971 {
1972 table = n;
1973 break;
1974 }
1975 }
1976
1977 fclose(f);
1978 }
1979
1980 if (table == RT_TABLE_UNSPEC)
1981 return false;
1982
1983 *id = table;
1984 return true;
1985 }
1986
1987 bool system_is_default_rt_table(unsigned int id)
1988 {
1989 return (id == RT_TABLE_MAIN);
1990 }
1991
1992 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
1993 {
1994 char *e;
1995 unsigned int n;
1996
1997 if (!strcmp(filter, "strict"))
1998 n = 1;
1999 else if (!strcmp(filter, "loose"))
2000 n = 2;
2001 else {
2002 n = strtoul(filter, &e, 0);
2003 if (*e || e == filter || n > 2)
2004 return false;
2005 }
2006
2007 *id = n;
2008 return true;
2009 }
2010
2011 static int system_iprule(struct iprule *rule, int cmd)
2012 {
2013 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2014
2015 struct nl_msg *msg;
2016 struct rtmsg rtm = {
2017 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2018 .rtm_protocol = RTPROT_STATIC,
2019 .rtm_scope = RT_SCOPE_UNIVERSE,
2020 .rtm_table = RT_TABLE_UNSPEC,
2021 .rtm_type = RTN_UNSPEC,
2022 .rtm_flags = 0,
2023 };
2024
2025 if (cmd == RTM_NEWRULE)
2026 rtm.rtm_type = RTN_UNICAST;
2027
2028 if (rule->invert)
2029 rtm.rtm_flags |= FIB_RULE_INVERT;
2030
2031 if (rule->flags & IPRULE_SRC)
2032 rtm.rtm_src_len = rule->src_mask;
2033
2034 if (rule->flags & IPRULE_DEST)
2035 rtm.rtm_dst_len = rule->dest_mask;
2036
2037 if (rule->flags & IPRULE_TOS)
2038 rtm.rtm_tos = rule->tos;
2039
2040 if (rule->flags & IPRULE_LOOKUP) {
2041 if (rule->lookup < 256)
2042 rtm.rtm_table = rule->lookup;
2043 }
2044
2045 if (rule->flags & IPRULE_ACTION)
2046 rtm.rtm_type = rule->action;
2047 else if (rule->flags & IPRULE_GOTO)
2048 rtm.rtm_type = FR_ACT_GOTO;
2049 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2050 rtm.rtm_type = FR_ACT_NOP;
2051
2052 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2053
2054 if (!msg)
2055 return -1;
2056
2057 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2058
2059 if (rule->flags & IPRULE_IN)
2060 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2061
2062 if (rule->flags & IPRULE_OUT)
2063 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2064
2065 if (rule->flags & IPRULE_SRC)
2066 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2067
2068 if (rule->flags & IPRULE_DEST)
2069 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2070
2071 if (rule->flags & IPRULE_PRIORITY)
2072 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2073 else if (cmd == RTM_NEWRULE)
2074 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2075
2076 if (rule->flags & IPRULE_FWMARK)
2077 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2078
2079 if (rule->flags & IPRULE_FWMASK)
2080 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2081
2082 if (rule->flags & IPRULE_LOOKUP) {
2083 if (rule->lookup >= 256)
2084 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2085 }
2086
2087 if (rule->flags & IPRULE_GOTO)
2088 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2089
2090 return system_rtnl_call(msg);
2091 }
2092
2093 int system_add_iprule(struct iprule *rule)
2094 {
2095 return system_iprule(rule, RTM_NEWRULE);
2096 }
2097
2098 int system_del_iprule(struct iprule *rule)
2099 {
2100 return system_iprule(rule, RTM_DELRULE);
2101 }
2102
2103 int system_flush_iprules(void)
2104 {
2105 int rv = 0;
2106 struct iprule rule;
2107
2108 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2109 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2110
2111 memset(&rule, 0, sizeof(rule));
2112
2113
2114 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2115
2116 rule.priority = 0;
2117 rule.lookup = RT_TABLE_LOCAL;
2118 rv |= system_iprule(&rule, RTM_NEWRULE);
2119
2120 rule.priority = 32766;
2121 rule.lookup = RT_TABLE_MAIN;
2122 rv |= system_iprule(&rule, RTM_NEWRULE);
2123
2124 rule.priority = 32767;
2125 rule.lookup = RT_TABLE_DEFAULT;
2126 rv |= system_iprule(&rule, RTM_NEWRULE);
2127
2128
2129 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2130
2131 rule.priority = 0;
2132 rule.lookup = RT_TABLE_LOCAL;
2133 rv |= system_iprule(&rule, RTM_NEWRULE);
2134
2135 rule.priority = 32766;
2136 rule.lookup = RT_TABLE_MAIN;
2137 rv |= system_iprule(&rule, RTM_NEWRULE);
2138
2139 return rv;
2140 }
2141
2142 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2143 {
2144 return system_rtn_aton(action, id);
2145 }
2146
2147 time_t system_get_rtime(void)
2148 {
2149 struct timespec ts;
2150 struct timeval tv;
2151
2152 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2153 return ts.tv_sec;
2154
2155 if (gettimeofday(&tv, NULL) == 0)
2156 return tv.tv_sec;
2157
2158 return 0;
2159 }
2160
2161 #ifndef IP_DF
2162 #define IP_DF 0x4000
2163 #endif
2164
2165 static int tunnel_ioctl(const char *name, int cmd, void *p)
2166 {
2167 struct ifreq ifr;
2168
2169 memset(&ifr, 0, sizeof(ifr));
2170 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
2171 ifr.ifr_ifru.ifru_data = p;
2172 return ioctl(sock_ioctl, cmd, &ifr);
2173 }
2174
2175 #ifdef IFLA_IPTUN_MAX
2176 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2177 static int system_add_gre_tunnel(const char *name, const char *kind,
2178 const unsigned int link, struct blob_attr **tb, bool v6)
2179 {
2180 struct nl_msg *nlm;
2181 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2182 struct blob_attr *cur;
2183 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2184 uint16_t iflags = 0, oflags = 0;
2185 uint8_t tos = 0;
2186 int ret = 0, ttl = 0;
2187
2188 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2189 if (!nlm)
2190 return -1;
2191
2192 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2193 nla_put_string(nlm, IFLA_IFNAME, name);
2194
2195 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2196 if (!linkinfo) {
2197 ret = -ENOMEM;
2198 goto failure;
2199 }
2200
2201 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2202 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2203 if (!infodata) {
2204 ret = -ENOMEM;
2205 goto failure;
2206 }
2207
2208 if (link)
2209 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2210
2211 if ((cur = tb[TUNNEL_ATTR_TTL]))
2212 ttl = blobmsg_get_u32(cur);
2213
2214 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2215 char *str = blobmsg_get_string(cur);
2216 if (strcmp(str, "inherit")) {
2217 unsigned uval;
2218
2219 if (!system_tos_aton(str, &uval)) {
2220 ret = -EINVAL;
2221 goto failure;
2222 }
2223
2224 if (v6)
2225 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2226 else
2227 tos = uval;
2228 } else {
2229 if (v6)
2230 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2231 else
2232 tos = 1;
2233 }
2234 }
2235
2236 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2237 uint8_t icsum, ocsum, iseqno, oseqno;
2238 if (sscanf(blobmsg_get_string(cur), "%u,%u,%hhu,%hhu,%hhu,%hhu",
2239 &ikey, &okey, &icsum, &ocsum, &iseqno, &oseqno) < 6) {
2240 ret = -EINVAL;
2241 goto failure;
2242 }
2243
2244 if (ikey)
2245 iflags |= GRE_KEY;
2246
2247 if (okey)
2248 oflags |= GRE_KEY;
2249
2250 if (icsum)
2251 iflags |= GRE_CSUM;
2252
2253 if (ocsum)
2254 oflags |= GRE_CSUM;
2255
2256 if (iseqno)
2257 iflags |= GRE_SEQ;
2258
2259 if (oseqno)
2260 oflags |= GRE_SEQ;
2261 }
2262
2263 if (v6) {
2264 struct in6_addr in6buf;
2265 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2266 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2267 ret = -EINVAL;
2268 goto failure;
2269 }
2270 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2271 }
2272
2273 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2274 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2275 ret = -EINVAL;
2276 goto failure;
2277 }
2278 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2279 }
2280 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2281
2282 if (flowinfo)
2283 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2284
2285 if (flags)
2286 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2287
2288 if (!ttl)
2289 ttl = 64;
2290 } else {
2291 struct in_addr inbuf;
2292 bool set_df = true;
2293
2294 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2295 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2296 ret = -EINVAL;
2297 goto failure;
2298 }
2299 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2300 }
2301
2302 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2303 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2304 ret = -EINVAL;
2305 goto failure;
2306 }
2307 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2308
2309 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2310 if (!okey) {
2311 okey = inbuf.s_addr;
2312 oflags |= GRE_KEY;
2313 }
2314
2315 if (!ikey) {
2316 ikey = inbuf.s_addr;
2317 iflags |= GRE_KEY;
2318 }
2319 }
2320 }
2321
2322 if ((cur = tb[TUNNEL_ATTR_DF]))
2323 set_df = blobmsg_get_bool(cur);
2324
2325 if (!set_df) {
2326 /* ttl != 0 and nopmtudisc are incompatible */
2327 if (ttl) {
2328 ret = -EINVAL;
2329 goto failure;
2330 }
2331 } else if (!ttl)
2332 ttl = 64;
2333
2334 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2335
2336 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2337 }
2338
2339 if (ttl)
2340 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2341
2342 if (oflags)
2343 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2344
2345 if (iflags)
2346 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2347
2348 if (okey)
2349 nla_put_u32(nlm, IFLA_GRE_OKEY, okey);
2350
2351 if (ikey)
2352 nla_put_u32(nlm, IFLA_GRE_IKEY, ikey);
2353
2354 nla_nest_end(nlm, infodata);
2355 nla_nest_end(nlm, linkinfo);
2356
2357 return system_rtnl_call(nlm);
2358
2359 failure:
2360 nlmsg_free(nlm);
2361 return ret;
2362 }
2363 #endif
2364
2365 #ifdef IFLA_VTI_MAX
2366 static int system_add_vti_tunnel(const char *name, const char *kind,
2367 const unsigned int link, struct blob_attr **tb, bool v6)
2368 {
2369 struct nl_msg *nlm;
2370 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2371 struct blob_attr *cur;
2372 uint32_t ikey = 0, okey = 0;
2373 int ret = 0;
2374
2375 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2376 if (!nlm)
2377 return -1;
2378
2379 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2380 nla_put_string(nlm, IFLA_IFNAME, name);
2381
2382 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2383 if (!linkinfo) {
2384 ret = -ENOMEM;
2385 goto failure;
2386 }
2387
2388 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2389 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2390 if (!infodata) {
2391 ret = -ENOMEM;
2392 goto failure;
2393 }
2394
2395 if (link)
2396 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2397
2398 if ((cur = tb[TUNNEL_ATTR_INFO]) && (blobmsg_type(cur) == BLOBMSG_TYPE_STRING)) {
2399 if (sscanf(blobmsg_get_string(cur), "%u,%u",
2400 &ikey, &okey) < 2) {
2401 ret = -EINVAL;
2402 goto failure;
2403 }
2404 }
2405
2406 if (v6) {
2407 struct in6_addr in6buf;
2408 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2409 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2410 ret = -EINVAL;
2411 goto failure;
2412 }
2413 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2414 }
2415
2416 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2417 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2418 ret = -EINVAL;
2419 goto failure;
2420 }
2421 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2422 }
2423
2424 } else {
2425 struct in_addr inbuf;
2426
2427 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2428 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2429 ret = -EINVAL;
2430 goto failure;
2431 }
2432 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2433 }
2434
2435 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2436 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2437 ret = -EINVAL;
2438 goto failure;
2439 }
2440 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2441 }
2442
2443 }
2444
2445 if (okey)
2446 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2447
2448 if (ikey)
2449 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2450
2451 nla_nest_end(nlm, infodata);
2452 nla_nest_end(nlm, linkinfo);
2453
2454 return system_rtnl_call(nlm);
2455
2456 failure:
2457 nlmsg_free(nlm);
2458 return ret;
2459 }
2460 #endif
2461
2462 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2463 {
2464 struct blob_attr *cur;
2465 bool set_df = true;
2466 struct ip_tunnel_parm p = {
2467 .link = link,
2468 .iph = {
2469 .version = 4,
2470 .ihl = 5,
2471 .protocol = proto,
2472 }
2473 };
2474
2475 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2476 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2477 return -EINVAL;
2478
2479 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2480 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2481 return -EINVAL;
2482
2483 if ((cur = tb[TUNNEL_ATTR_DF]))
2484 set_df = blobmsg_get_bool(cur);
2485
2486 if ((cur = tb[TUNNEL_ATTR_TTL]))
2487 p.iph.ttl = blobmsg_get_u32(cur);
2488
2489 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2490 char *str = blobmsg_get_string(cur);
2491 if (strcmp(str, "inherit")) {
2492 unsigned uval;
2493
2494 if (!system_tos_aton(str, &uval))
2495 return -EINVAL;
2496
2497 p.iph.tos = uval;
2498 } else
2499 p.iph.tos = 1;
2500 }
2501
2502 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
2503 /* ttl !=0 and nopmtudisc are incompatible */
2504 if (p.iph.ttl && p.iph.frag_off == 0)
2505 return -EINVAL;
2506
2507 strncpy(p.name, name, sizeof(p.name));
2508
2509 switch (p.iph.protocol) {
2510 case IPPROTO_IPIP:
2511 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
2512 case IPPROTO_IPV6:
2513 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
2514 default:
2515 break;
2516 }
2517 return -1;
2518 }
2519
2520 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
2521 {
2522 struct blob_attr *cur;
2523 const char *str;
2524
2525 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2526 return -EINVAL;
2527 str = blobmsg_data(cur);
2528
2529 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
2530 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
2531 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6"))
2532 return system_link_del(name);
2533 else
2534 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
2535 }
2536
2537 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
2538 {
2539 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2540
2541 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2542 blob_data(attr), blob_len(attr));
2543
2544 return __system_del_ip_tunnel(name, tb);
2545 }
2546
2547 int system_update_ipv6_mtu(struct device *dev, int mtu)
2548 {
2549 int ret = -1;
2550 char buf[64];
2551 int fd;
2552
2553 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
2554 dev->ifname);
2555
2556 fd = open(buf, O_RDWR);
2557 if (fd < 0)
2558 return ret;
2559
2560 if (!mtu) {
2561 ssize_t len = read(fd, buf, sizeof(buf) - 1);
2562 if (len < 0)
2563 goto out;
2564
2565 buf[len] = 0;
2566 ret = atoi(buf);
2567 } else {
2568 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
2569 ret = mtu;
2570 }
2571
2572 out:
2573 close(fd);
2574 return ret;
2575 }
2576
2577 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
2578 {
2579 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
2580 struct blob_attr *cur;
2581 const char *str;
2582
2583 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
2584 blob_data(attr), blob_len(attr));
2585
2586 __system_del_ip_tunnel(name, tb);
2587
2588 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
2589 return -EINVAL;
2590 str = blobmsg_data(cur);
2591
2592 unsigned int ttl = 0;
2593 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2594 ttl = blobmsg_get_u32(cur);
2595 if (ttl > 255)
2596 return -EINVAL;
2597 }
2598
2599 unsigned int link = 0;
2600 if ((cur = tb[TUNNEL_ATTR_LINK])) {
2601 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
2602 if (!iface)
2603 return -EINVAL;
2604
2605 if (iface->l3_dev.dev)
2606 link = iface->l3_dev.dev->ifindex;
2607 }
2608
2609 if (!strcmp(str, "sit")) {
2610 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2611 return -1;
2612
2613 #ifdef SIOCADD6RD
2614 if ((cur = tb[TUNNEL_ATTR_6RD_PREFIX])) {
2615 unsigned int mask;
2616 struct ip_tunnel_6rd p6;
2617
2618 memset(&p6, 0, sizeof(p6));
2619
2620 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2621 &p6.prefix, &mask) || mask > 128)
2622 return -EINVAL;
2623 p6.prefixlen = mask;
2624
2625 if ((cur = tb[TUNNEL_ATTR_6RD_RELAY_PREFIX])) {
2626 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2627 &p6.relay_prefix, &mask) || mask > 32)
2628 return -EINVAL;
2629 p6.relay_prefixlen = mask;
2630 }
2631
2632 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2633 __system_del_ip_tunnel(name, tb);
2634 return -1;
2635 }
2636 }
2637 #endif
2638 #ifdef IFLA_IPTUN_MAX
2639 } else if (!strcmp(str, "ipip6")) {
2640 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2641 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2642 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2643 int ret = 0;
2644
2645 if (!nlm)
2646 return -1;
2647
2648 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2649 nla_put_string(nlm, IFLA_IFNAME, name);
2650
2651 if (link)
2652 nla_put_u32(nlm, IFLA_LINK, link);
2653
2654 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2655 if (!linkinfo) {
2656 ret = -ENOMEM;
2657 goto failure;
2658 }
2659 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2660 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2661 if (!infodata) {
2662 ret = -ENOMEM;
2663 goto failure;
2664 }
2665
2666 if (link)
2667 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2668
2669 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2670 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2671 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, 4);
2672
2673 struct in6_addr in6buf;
2674 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2675 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2676 ret = -EINVAL;
2677 goto failure;
2678 }
2679 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2680 }
2681
2682 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2683 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2684 ret = -EINVAL;
2685 goto failure;
2686 }
2687 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2688 }
2689
2690 #ifdef IFLA_IPTUN_FMR_MAX
2691 if ((cur = tb[TUNNEL_ATTR_FMRS])) {
2692 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2693
2694 struct blob_attr *fmr;
2695 unsigned rem, fmrcnt = 0;
2696 blobmsg_for_each_attr(fmr, cur, rem) {
2697 if (blobmsg_type(fmr) != BLOBMSG_TYPE_STRING)
2698 continue;
2699
2700 unsigned ip4len, ip6len, ealen, offset = 6;
2701 char ip6buf[48];
2702 char ip4buf[16];
2703
2704 if (sscanf(blobmsg_get_string(fmr), "%47[^/]/%u,%15[^/]/%u,%u,%u",
2705 ip6buf, &ip6len, ip4buf, &ip4len, &ealen, &offset) < 5) {
2706 ret = -EINVAL;
2707 goto failure;
2708 }
2709
2710 struct in6_addr ip6prefix;
2711 struct in_addr ip4prefix;
2712 if (inet_pton(AF_INET6, ip6buf, &ip6prefix) != 1 ||
2713 inet_pton(AF_INET, ip4buf, &ip4prefix) != 1) {
2714 ret = -EINVAL;
2715 goto failure;
2716 }
2717
2718 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2719
2720 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2721 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2722 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2723 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2724 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2725 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2726
2727 nla_nest_end(nlm, rule);
2728 }
2729
2730 nla_nest_end(nlm, fmrs);
2731 }
2732 #endif
2733
2734 nla_nest_end(nlm, infodata);
2735 nla_nest_end(nlm, linkinfo);
2736
2737 return system_rtnl_call(nlm);
2738 failure:
2739 nlmsg_free(nlm);
2740 return ret;
2741 } else if (!strcmp(str, "greip")) {
2742 return system_add_gre_tunnel(name, "gre", link, tb, false);
2743 } else if (!strcmp(str, "gretapip")) {
2744 return system_add_gre_tunnel(name, "gretap", link, tb, false);
2745 } else if (!strcmp(str, "greip6")) {
2746 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
2747 } else if (!strcmp(str, "gretapip6")) {
2748 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
2749 #ifdef IFLA_VTI_MAX
2750 } else if (!strcmp(str, "vtiip")) {
2751 return system_add_vti_tunnel(name, "vti", link, tb, false);
2752 } else if (!strcmp(str, "vtiip6")) {
2753 return system_add_vti_tunnel(name, "vti6", link, tb, true);
2754 #endif
2755 #endif
2756 } else if (!strcmp(str, "ipip")) {
2757 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
2758 }
2759 else
2760 return -EINVAL;
2761
2762 return 0;
2763 }
OpenWrt Network interface configuration daemon