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system-linux: fix a typo in gre tunnel data parsing logic
[project/netifd.git] / system-linux.c
1 /*
2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
4 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
5 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
6 * Copyright (C) 2014 Gioacchino Mazzurco <gio@eigenlab.org>
7 * Copyright (C) 2017 Matthias Schiffer <mschiffer@universe-factory.net>
8 * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * as published by the Free Software Foundation
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19 #define _GNU_SOURCE
20
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
23 #include <sys/stat.h>
24 #include <sys/syscall.h>
25
26 #include <net/if.h>
27 #include <net/if_arp.h>
28
29 #include <arpa/inet.h>
30 #include <netinet/ether.h>
31 #include <netinet/in.h>
32
33 #include <linux/rtnetlink.h>
34 #include <linux/sockios.h>
35 #include <linux/ip.h>
36 #include <linux/if_addr.h>
37 #include <linux/if_link.h>
38 #include <linux/if_vlan.h>
39 #include <linux/if_bridge.h>
40 #include <linux/if_tunnel.h>
41 #include <linux/ip6_tunnel.h>
42 #include <linux/ethtool.h>
43 #include <linux/fib_rules.h>
44 #include <linux/veth.h>
45 #include <linux/version.h>
46
47 #ifndef RTN_FAILED_POLICY
48 #define RTN_FAILED_POLICY 12
49 #endif
50
51 #ifndef IFA_F_NOPREFIXROUTE
52 #define IFA_F_NOPREFIXROUTE 0x200
53 #endif
54
55 #ifndef IFA_FLAGS
56 #define IFA_FLAGS (IFA_MULTICAST + 1)
57 #endif
58
59 #include <string.h>
60 #include <fcntl.h>
61 #include <glob.h>
62 #include <time.h>
63 #include <unistd.h>
64
65 #include <netlink/msg.h>
66 #include <netlink/attr.h>
67 #include <netlink/socket.h>
68 #include <libubox/uloop.h>
69
70 #include "netifd.h"
71 #include "device.h"
72 #include "system.h"
73
74 struct event_socket {
75 struct uloop_fd uloop;
76 struct nl_sock *sock;
77 int bufsize;
78 };
79
80 static int sock_ioctl = -1;
81 static struct nl_sock *sock_rtnl = NULL;
82
83 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
84 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
85 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
86 const unsigned int link, struct blob_attr **tb);
87 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
88
89 static char dev_buf[256];
90
91 static void
92 handler_nl_event(struct uloop_fd *u, unsigned int events)
93 {
94 struct event_socket *ev = container_of(u, struct event_socket, uloop);
95 int err;
96 socklen_t errlen = sizeof(err);
97
98 if (!u->error) {
99 nl_recvmsgs_default(ev->sock);
100 return;
101 }
102
103 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
104 goto abort;
105
106 switch(err) {
107 case ENOBUFS:
108 // Increase rx buffer size on netlink socket
109 ev->bufsize *= 2;
110 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
111 goto abort;
112
113 // Request full dump since some info got dropped
114 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
115 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
116 break;
117
118 default:
119 goto abort;
120 }
121 u->error = false;
122 return;
123
124 abort:
125 uloop_fd_delete(&ev->uloop);
126 return;
127 }
128
129 static struct nl_sock *
130 create_socket(int protocol, int groups)
131 {
132 struct nl_sock *sock;
133
134 sock = nl_socket_alloc();
135 if (!sock)
136 return NULL;
137
138 if (groups)
139 nl_join_groups(sock, groups);
140
141 if (nl_connect(sock, protocol))
142 return NULL;
143
144 return sock;
145 }
146
147 static bool
148 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
149 uloop_fd_handler cb, int flags)
150 {
151 ev->sock = create_socket(protocol, groups);
152 if (!ev->sock)
153 return false;
154
155 ev->uloop.fd = nl_socket_get_fd(ev->sock);
156 ev->uloop.cb = cb;
157 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
158 return false;
159
160 return true;
161 }
162
163 static bool
164 create_event_socket(struct event_socket *ev, int protocol,
165 int (*cb)(struct nl_msg *msg, void *arg))
166 {
167 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
168 return false;
169
170 // Install the valid custom callback handler
171 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
172
173 // Disable sequence number checking on event sockets
174 nl_socket_disable_seq_check(ev->sock);
175
176 // Increase rx buffer size to 65K on event sockets
177 ev->bufsize = 65535;
178 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
179 return false;
180
181 return true;
182 }
183
184 static bool
185 system_rtn_aton(const char *src, unsigned int *dst)
186 {
187 char *e;
188 unsigned int n;
189
190 if (!strcmp(src, "local"))
191 n = RTN_LOCAL;
192 else if (!strcmp(src, "nat"))
193 n = RTN_NAT;
194 else if (!strcmp(src, "broadcast"))
195 n = RTN_BROADCAST;
196 else if (!strcmp(src, "anycast"))
197 n = RTN_ANYCAST;
198 else if (!strcmp(src, "multicast"))
199 n = RTN_MULTICAST;
200 else if (!strcmp(src, "prohibit"))
201 n = RTN_PROHIBIT;
202 else if (!strcmp(src, "unreachable"))
203 n = RTN_UNREACHABLE;
204 else if (!strcmp(src, "blackhole"))
205 n = RTN_BLACKHOLE;
206 else if (!strcmp(src, "xresolve"))
207 n = RTN_XRESOLVE;
208 else if (!strcmp(src, "unicast"))
209 n = RTN_UNICAST;
210 else if (!strcmp(src, "throw"))
211 n = RTN_THROW;
212 else if (!strcmp(src, "failed_policy"))
213 n = RTN_FAILED_POLICY;
214 else {
215 n = strtoul(src, &e, 0);
216 if (!e || *e || e == src || n > 255)
217 return false;
218 }
219
220 *dst = n;
221 return true;
222 }
223
224 static bool
225 system_tos_aton(const char *src, unsigned *dst)
226 {
227 char *e;
228
229 *dst = strtoul(src, &e, 16);
230 if (e == src || *e || *dst > 255)
231 return false;
232
233 return true;
234 }
235
236 int system_init(void)
237 {
238 static struct event_socket rtnl_event;
239 static struct event_socket hotplug_event;
240
241 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
242 system_fd_set_cloexec(sock_ioctl);
243
244 // Prepare socket for routing / address control
245 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
246 if (!sock_rtnl)
247 return -1;
248
249 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
250 return -1;
251
252 if (!create_raw_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT, 1,
253 handle_hotplug_event, 0))
254 return -1;
255
256 // Receive network link events form kernel
257 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
258
259 return 0;
260 }
261
262 static void system_set_sysctl(const char *path, const char *val)
263 {
264 int fd;
265
266 fd = open(path, O_WRONLY);
267 if (fd < 0)
268 return;
269
270 if (write(fd, val, strlen(val))) {}
271 close(fd);
272 }
273
274 static void system_set_dev_sysctl(const char *path, const char *device, const char *val)
275 {
276 snprintf(dev_buf, sizeof(dev_buf), path, device);
277 system_set_sysctl(dev_buf, val);
278 }
279
280 static void system_set_disable_ipv6(struct device *dev, const char *val)
281 {
282 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6", dev->ifname, val);
283 }
284
285 static void system_set_rpfilter(struct device *dev, const char *val)
286 {
287 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
288 }
289
290 static void system_set_acceptlocal(struct device *dev, const char *val)
291 {
292 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
293 }
294
295 static void system_set_igmpversion(struct device *dev, const char *val)
296 {
297 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version", dev->ifname, val);
298 }
299
300 static void system_set_mldversion(struct device *dev, const char *val)
301 {
302 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version", dev->ifname, val);
303 }
304
305 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
306 {
307 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms", dev->ifname, val);
308 }
309
310 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
311 {
312 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms", dev->ifname, val);
313 }
314
315 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
316 {
317 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time", dev->ifname, val);
318 }
319
320 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
321 {
322 system_set_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time", dev->ifname, val);
323 }
324
325 static void system_set_neigh4locktime(struct device *dev, const char *val)
326 {
327 system_set_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime", dev->ifname, val);
328 }
329
330 static void system_set_dadtransmits(struct device *dev, const char *val)
331 {
332 system_set_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits", dev->ifname, val);
333 }
334
335 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
336 {
337 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_to_unicast", dev->ifname, val);
338 }
339
340 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
341 {
342 system_set_dev_sysctl("/sys/class/net/%s/brport/multicast_fast_leave", dev->ifname, val);
343 }
344
345 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
346 {
347 system_set_dev_sysctl("/sys/class/net/%s/brport/hairpin_mode", dev->ifname, val);
348 }
349
350 static void system_bridge_set_isolated(struct device *dev, const char *val)
351 {
352 system_set_dev_sysctl("/sys/class/net/%s/brport/isolated", dev->ifname, val);
353 }
354
355 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
356 {
357 system_set_dev_sysctl(bridge ? "/sys/class/net/%s/bridge/multicast_router" :
358 "/sys/class/net/%s/brport/multicast_router",
359 dev->ifname, val);
360 }
361
362 static void system_bridge_set_robustness(struct device *dev, const char *val)
363 {
364 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_count",
365 dev->ifname, val);
366 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_count",
367 dev->ifname, val);
368 }
369
370 static void system_bridge_set_query_interval(struct device *dev, const char *val)
371 {
372 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_interval",
373 dev->ifname, val);
374 }
375
376 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
377 {
378 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_query_response_interval",
379 dev->ifname, val);
380 }
381
382 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
383 {
384 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_last_member_interval",
385 dev->ifname, val);
386 }
387
388 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
389 {
390 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_membership_interval",
391 dev->ifname, val);
392 }
393
394 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
395 {
396 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier_interval",
397 dev->ifname, val);
398 }
399
400 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
401 {
402 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_startup_query_interval",
403 dev->ifname, val);
404 }
405
406 static void system_bridge_set_learning(struct device *dev, const char *val)
407 {
408 system_set_dev_sysctl("/sys/class/net/%s/brport/learning", dev->ifname, val);
409 }
410
411 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
412 {
413 system_set_dev_sysctl("/sys/class/net/%s/brport/unicast_flood", dev->ifname, val);
414 }
415
416 static void system_set_sendredirects(struct device *dev, const char *val)
417 {
418 system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects", dev->ifname, val);
419 }
420
421 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
422 {
423 int fd = -1, ret = -1;
424
425 fd = open(path, O_RDONLY);
426 if (fd < 0)
427 goto out;
428
429 ssize_t len = read(fd, buf, buf_sz - 1);
430 if (len < 0)
431 goto out;
432
433 ret = buf[len] = 0;
434
435 out:
436 if (fd >= 0)
437 close(fd);
438
439 return ret;
440 }
441
442 static int
443 system_get_dev_sysctl(const char *path, const char *device, char *buf, const size_t buf_sz)
444 {
445 snprintf(dev_buf, sizeof(dev_buf), path, device);
446 return system_get_sysctl(dev_buf, buf, buf_sz);
447 }
448
449 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
450 {
451 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/disable_ipv6",
452 dev->ifname, buf, buf_sz);
453 }
454
455 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
456 {
457 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter",
458 dev->ifname, buf, buf_sz);
459 }
460
461 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
462 {
463 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
464 dev->ifname, buf, buf_sz);
465 }
466
467 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
468 {
469 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/force_igmp_version",
470 dev->ifname, buf, buf_sz);
471 }
472
473 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
474 {
475 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/force_mld_version",
476 dev->ifname, buf, buf_sz);
477 }
478
479 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
480 {
481 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/base_reachable_time_ms",
482 dev->ifname, buf, buf_sz);
483 }
484
485 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
486 {
487 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/base_reachable_time_ms",
488 dev->ifname, buf, buf_sz);
489 }
490
491 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
492 {
493 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/gc_stale_time",
494 dev->ifname, buf, buf_sz);
495 }
496
497 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
498 {
499 return system_get_dev_sysctl("/proc/sys/net/ipv6/neigh/%s/gc_stale_time",
500 dev->ifname, buf, buf_sz);
501 }
502
503 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
504 {
505 return system_get_dev_sysctl("/proc/sys/net/ipv4/neigh/%s/locktime",
506 dev->ifname, buf, buf_sz);
507 }
508
509 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
510 {
511 return system_get_dev_sysctl("/proc/sys/net/ipv6/conf/%s/dad_transmits",
512 dev->ifname, buf, buf_sz);
513 }
514
515 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
516 {
517 return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/send_redirects",
518 dev->ifname, buf, buf_sz);
519 }
520
521 // Evaluate netlink messages
522 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
523 {
524 struct nlmsghdr *nh = nlmsg_hdr(msg);
525 struct nlattr *nla[__IFLA_MAX];
526 int link_state = 0;
527 char buf[10];
528
529 if (nh->nlmsg_type != RTM_NEWLINK)
530 goto out;
531
532 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
533 if (!nla[IFLA_IFNAME])
534 goto out;
535
536 struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
537 if (!dev)
538 goto out;
539
540 if (!system_get_dev_sysctl("/sys/class/net/%s/carrier", dev->ifname, buf, sizeof(buf)))
541 link_state = strtoul(buf, NULL, 0);
542
543 device_set_link(dev, link_state ? true : false);
544
545 out:
546 return 0;
547 }
548
549 static void
550 handle_hotplug_msg(char *data, int size)
551 {
552 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
553 char *cur, *end, *sep;
554 struct device *dev;
555 int skip;
556 bool add, move = false;
557
558 if (!strncmp(data, "add@", 4))
559 add = true;
560 else if (!strncmp(data, "remove@", 7))
561 add = false;
562 else if (!strncmp(data, "move@", 5)) {
563 add = true;
564 move = true;
565 }
566 else
567 return;
568
569 skip = strlen(data) + 1;
570 end = data + size;
571
572 for (cur = data + skip; cur < end; cur += skip) {
573 skip = strlen(cur) + 1;
574
575 sep = strchr(cur, '=');
576 if (!sep)
577 continue;
578
579 *sep = 0;
580 if (!strcmp(cur, "INTERFACE"))
581 interface = sep + 1;
582 else if (!strcmp(cur, "SUBSYSTEM")) {
583 subsystem = sep + 1;
584 if (strcmp(subsystem, "net") != 0)
585 return;
586 } else if (!strcmp(cur, "DEVPATH_OLD")) {
587 interface_old = strrchr(sep + 1, '/');
588 if (interface_old)
589 interface_old++;
590 }
591 }
592
593 if (subsystem && interface) {
594 if (move && interface_old)
595 goto move;
596 else
597 goto found;
598 }
599
600 return;
601
602 move:
603 dev = device_find(interface_old);
604 if (!dev)
605 goto found;
606
607 if (dev->type != &simple_device_type)
608 goto found;
609
610 device_set_present(dev, false);
611
612 found:
613 dev = device_find(interface);
614 if (!dev)
615 return;
616
617 if (dev->type != &simple_device_type)
618 return;
619
620 if (add && system_if_force_external(dev->ifname))
621 return;
622
623 device_set_present(dev, add);
624 }
625
626 static void
627 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
628 {
629 struct event_socket *ev = container_of(u, struct event_socket, uloop);
630 struct sockaddr_nl nla;
631 unsigned char *buf = NULL;
632 int size;
633
634 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
635 if (nla.nl_pid == 0)
636 handle_hotplug_msg((char *) buf, size);
637
638 free(buf);
639 }
640 }
641
642 static int system_rtnl_call(struct nl_msg *msg)
643 {
644 int ret;
645
646 ret = nl_send_auto_complete(sock_rtnl, msg);
647 nlmsg_free(msg);
648
649 if (ret < 0)
650 return ret;
651
652 return nl_wait_for_ack(sock_rtnl);
653 }
654
655 int system_bridge_delbr(struct device *bridge)
656 {
657 return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
658 }
659
660 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
661 {
662 struct ifreq ifr;
663
664 memset(&ifr, 0, sizeof(ifr));
665 if (dev)
666 ifr.ifr_ifindex = dev->ifindex;
667 else
668 ifr.ifr_data = data;
669 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
670 return ioctl(sock_ioctl, cmd, &ifr);
671 }
672
673 static bool system_is_bridge(const char *name, char *buf, int buflen)
674 {
675 struct stat st;
676
677 snprintf(buf, buflen, "/sys/devices/virtual/net/%s/bridge", name);
678 if (stat(buf, &st) < 0)
679 return false;
680
681 return true;
682 }
683
684 static char *system_get_bridge(const char *name, char *buf, int buflen)
685 {
686 char *path;
687 ssize_t len = -1;
688 glob_t gl;
689
690 snprintf(buf, buflen, "/sys/devices/virtual/net/*/brif/%s/bridge", name);
691 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
692 return NULL;
693
694 if (gl.gl_pathc > 0)
695 len = readlink(gl.gl_pathv[0], buf, buflen);
696
697 globfree(&gl);
698
699 if (len < 0)
700 return NULL;
701
702 buf[len] = 0;
703 path = strrchr(buf, '/');
704 if (!path)
705 return NULL;
706
707 return path + 1;
708 }
709
710 static void
711 system_bridge_set_wireless(struct device *bridge, struct device *dev)
712 {
713 bool mcast_to_ucast = dev->wireless_ap;
714 bool hairpin = true;
715
716 if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
717 !bridge->settings.multicast_to_unicast)
718 mcast_to_ucast = false;
719
720 if (!mcast_to_ucast || dev->wireless_isolate)
721 hairpin = false;
722
723 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
724 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
725 }
726
727 int system_bridge_addif(struct device *bridge, struct device *dev)
728 {
729 char buf[64];
730 char *oldbr;
731 int ret = 0;
732
733 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
734 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0)
735 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
736
737 if (dev->wireless)
738 system_bridge_set_wireless(bridge, dev);
739
740 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
741 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
742 system_bridge_set_multicast_router(dev, buf, false);
743 }
744
745 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
746 dev->settings.multicast_fast_leave)
747 system_bridge_set_multicast_fast_leave(dev, "1");
748
749 if (dev->settings.flags & DEV_OPT_LEARNING &&
750 !dev->settings.learning)
751 system_bridge_set_learning(dev, "0");
752
753 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
754 !dev->settings.unicast_flood)
755 system_bridge_set_unicast_flood(dev, "0");
756
757 if (dev->settings.flags & DEV_OPT_ISOLATE &&
758 dev->settings.isolate)
759 system_bridge_set_isolated(dev, "1");
760
761 return ret;
762 }
763
764 int system_bridge_delif(struct device *bridge, struct device *dev)
765 {
766 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
767 }
768
769 int system_if_resolve(struct device *dev)
770 {
771 struct ifreq ifr;
772 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
773 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
774 return ifr.ifr_ifindex;
775 else
776 return 0;
777 }
778
779 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
780 {
781 struct ifreq ifr;
782
783 memset(&ifr, 0, sizeof(ifr));
784 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
785 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
786 return -1;
787
788 ifr.ifr_flags |= add;
789 ifr.ifr_flags &= ~rem;
790 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
791 }
792
793 struct clear_data {
794 struct nl_msg *msg;
795 struct device *dev;
796 int type;
797 int size;
798 int af;
799 };
800
801
802 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
803 {
804 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
805
806 return ifa->ifa_index == ifindex;
807 }
808
809 static bool check_route(struct nlmsghdr *hdr, int ifindex)
810 {
811 struct rtmsg *r = NLMSG_DATA(hdr);
812 struct nlattr *tb[__RTA_MAX];
813
814 if (r->rtm_protocol == RTPROT_KERNEL &&
815 r->rtm_family == AF_INET6)
816 return false;
817
818 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
819 if (!tb[RTA_OIF])
820 return false;
821
822 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
823 }
824
825 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
826 {
827 return true;
828 }
829
830 static int cb_clear_event(struct nl_msg *msg, void *arg)
831 {
832 struct clear_data *clr = arg;
833 struct nlmsghdr *hdr = nlmsg_hdr(msg);
834 bool (*cb)(struct nlmsghdr *, int ifindex);
835 int type;
836
837 switch(clr->type) {
838 case RTM_GETADDR:
839 type = RTM_DELADDR;
840 if (hdr->nlmsg_type != RTM_NEWADDR)
841 return NL_SKIP;
842
843 cb = check_ifaddr;
844 break;
845 case RTM_GETROUTE:
846 type = RTM_DELROUTE;
847 if (hdr->nlmsg_type != RTM_NEWROUTE)
848 return NL_SKIP;
849
850 cb = check_route;
851 break;
852 case RTM_GETRULE:
853 type = RTM_DELRULE;
854 if (hdr->nlmsg_type != RTM_NEWRULE)
855 return NL_SKIP;
856
857 cb = check_rule;
858 break;
859 default:
860 return NL_SKIP;
861 }
862
863 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
864 return NL_SKIP;
865
866 if (type == RTM_DELRULE)
867 D(SYSTEM, "Remove a rule\n");
868 else
869 D(SYSTEM, "Remove %s from device %s\n",
870 type == RTM_DELADDR ? "an address" : "a route",
871 clr->dev->ifname);
872 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
873 hdr = nlmsg_hdr(clr->msg);
874 hdr->nlmsg_type = type;
875 hdr->nlmsg_flags = NLM_F_REQUEST;
876
877 nl_socket_disable_auto_ack(sock_rtnl);
878 nl_send_auto_complete(sock_rtnl, clr->msg);
879 nl_socket_enable_auto_ack(sock_rtnl);
880
881 return NL_SKIP;
882 }
883
884 static int
885 cb_finish_event(struct nl_msg *msg, void *arg)
886 {
887 int *pending = arg;
888 *pending = 0;
889 return NL_STOP;
890 }
891
892 static int
893 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
894 {
895 int *pending = arg;
896 *pending = err->error;
897 return NL_STOP;
898 }
899
900 static void
901 system_if_clear_entries(struct device *dev, int type, int af)
902 {
903 struct clear_data clr;
904 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
905 struct rtmsg rtm = {
906 .rtm_family = af,
907 .rtm_flags = RTM_F_CLONED,
908 };
909 int flags = NLM_F_DUMP;
910 int pending = 1;
911
912 clr.af = af;
913 clr.dev = dev;
914 clr.type = type;
915 switch (type) {
916 case RTM_GETADDR:
917 case RTM_GETRULE:
918 clr.size = sizeof(struct rtgenmsg);
919 break;
920 case RTM_GETROUTE:
921 clr.size = sizeof(struct rtmsg);
922 break;
923 default:
924 return;
925 }
926
927 if (!cb)
928 return;
929
930 clr.msg = nlmsg_alloc_simple(type, flags);
931 if (!clr.msg)
932 goto out;
933
934 nlmsg_append(clr.msg, &rtm, clr.size, 0);
935 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
936 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
937 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
938
939 nl_send_auto_complete(sock_rtnl, clr.msg);
940 while (pending > 0)
941 nl_recvmsgs(sock_rtnl, cb);
942
943 nlmsg_free(clr.msg);
944 out:
945 nl_cb_put(cb);
946 }
947
948 /*
949 * Clear bridge (membership) state and bring down device
950 */
951 void system_if_clear_state(struct device *dev)
952 {
953 static char buf[256];
954 char *bridge;
955
956 device_set_ifindex(dev, system_if_resolve(dev));
957 if (dev->external || !dev->ifindex)
958 return;
959
960 system_if_flags(dev->ifname, 0, IFF_UP);
961
962 if (system_is_bridge(dev->ifname, buf, sizeof(buf))) {
963 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
964 system_bridge_delbr(dev);
965 return;
966 }
967
968 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
969 if (bridge) {
970 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
971 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
972 }
973
974 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
975 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
976 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
977 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
978 system_set_disable_ipv6(dev, "0");
979 }
980
981 static inline unsigned long
982 sec_to_jiffies(int val)
983 {
984 return (unsigned long) val * 100;
985 }
986
987 static void system_bridge_conf_multicast_deps(struct device *bridge,
988 struct bridge_config *cfg,
989 char *buf,
990 int buf_len)
991 {
992 int val;
993
994 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
995 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
996 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
997 val = cfg->robustness * cfg->query_interval +
998 cfg->query_response_interval;
999
1000 snprintf(buf, buf_len, "%i", val);
1001 system_bridge_set_membership_interval(bridge, buf);
1002
1003 val = cfg->robustness * cfg->query_interval +
1004 cfg->query_response_interval / 2;
1005
1006 snprintf(buf, buf_len, "%i", val);
1007 system_bridge_set_other_querier_timeout(bridge, buf);
1008 }
1009
1010 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1011 val = cfg->query_interval / 4;
1012
1013 snprintf(buf, buf_len, "%i", val);
1014 system_bridge_set_startup_query_interval(bridge, buf);
1015 }
1016 }
1017
1018 static void system_bridge_conf_multicast(struct device *bridge,
1019 struct bridge_config *cfg,
1020 char *buf,
1021 int buf_len)
1022 {
1023 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_snooping",
1024 bridge->ifname, cfg->igmp_snoop ? "1" : "0");
1025
1026 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/multicast_querier",
1027 bridge->ifname, cfg->multicast_querier ? "1" : "0");
1028
1029 snprintf(buf, buf_len, "%i", cfg->hash_max);
1030 system_set_dev_sysctl("/sys/devices/virtual/net/%s/bridge/hash_max",
1031 bridge->ifname, buf);
1032
1033 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1034 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1035 system_bridge_set_multicast_router(bridge, buf, true);
1036 }
1037
1038 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1039 snprintf(buf, buf_len, "%i", cfg->robustness);
1040 system_bridge_set_robustness(bridge, buf);
1041 }
1042
1043 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1044 snprintf(buf, buf_len, "%i", cfg->query_interval);
1045 system_bridge_set_query_interval(bridge, buf);
1046 }
1047
1048 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1049 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1050 system_bridge_set_query_response_interval(bridge, buf);
1051 }
1052
1053 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1054 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1055 system_bridge_set_last_member_interval(bridge, buf);
1056 }
1057
1058 system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1059 }
1060
1061 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1062 {
1063 char buf[64];
1064 unsigned long args[4] = {};
1065
1066 if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1067 return -1;
1068
1069 args[0] = BRCTL_SET_BRIDGE_STP_STATE;
1070 args[1] = !!cfg->stp;
1071 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1072
1073 args[0] = BRCTL_SET_BRIDGE_FORWARD_DELAY;
1074 args[1] = sec_to_jiffies(cfg->forward_delay);
1075 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1076
1077 system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1078
1079 args[0] = BRCTL_SET_BRIDGE_PRIORITY;
1080 args[1] = cfg->priority;
1081 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1082
1083 if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1084 args[0] = BRCTL_SET_AGEING_TIME;
1085 args[1] = sec_to_jiffies(cfg->ageing_time);
1086 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1087 }
1088
1089 if (cfg->flags & BRIDGE_OPT_HELLO_TIME) {
1090 args[0] = BRCTL_SET_BRIDGE_HELLO_TIME;
1091 args[1] = sec_to_jiffies(cfg->hello_time);
1092 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1093 }
1094
1095 if (cfg->flags & BRIDGE_OPT_MAX_AGE) {
1096 args[0] = BRCTL_SET_BRIDGE_MAX_AGE;
1097 args[1] = sec_to_jiffies(cfg->max_age);
1098 system_bridge_if(bridge->ifname, NULL, SIOCDEVPRIVATE, &args);
1099 }
1100
1101 return 0;
1102 }
1103
1104 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1105 {
1106 struct nl_msg *msg;
1107 struct nlattr *linkinfo, *data;
1108 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1109 int i, rv;
1110 static const struct {
1111 const char *name;
1112 enum macvlan_mode val;
1113 } modes[] = {
1114 { "private", MACVLAN_MODE_PRIVATE },
1115 { "vepa", MACVLAN_MODE_VEPA },
1116 { "bridge", MACVLAN_MODE_BRIDGE },
1117 { "passthru", MACVLAN_MODE_PASSTHRU },
1118 };
1119
1120 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1121
1122 if (!msg)
1123 return -1;
1124
1125 nlmsg_append(msg, &iim, sizeof(iim), 0);
1126
1127 if (cfg->flags & MACVLAN_OPT_MACADDR)
1128 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1129 nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1130 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1131
1132 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1133 goto nla_put_failure;
1134
1135 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1136
1137 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1138 goto nla_put_failure;
1139
1140 if (cfg->mode) {
1141 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1142 if (strcmp(cfg->mode, modes[i].name) != 0)
1143 continue;
1144
1145 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1146 break;
1147 }
1148 }
1149
1150 nla_nest_end(msg, data);
1151 nla_nest_end(msg, linkinfo);
1152
1153 rv = system_rtnl_call(msg);
1154 if (rv)
1155 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1156
1157 return rv;
1158
1159 nla_put_failure:
1160 nlmsg_free(msg);
1161 return -ENOMEM;
1162 }
1163
1164 static int system_link_del(const char *ifname)
1165 {
1166 struct nl_msg *msg;
1167 struct ifinfomsg iim = {
1168 .ifi_family = AF_UNSPEC,
1169 .ifi_index = 0,
1170 };
1171
1172 msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1173
1174 if (!msg)
1175 return -1;
1176
1177 nlmsg_append(msg, &iim, sizeof(iim), 0);
1178 nla_put_string(msg, IFLA_IFNAME, ifname);
1179 return system_rtnl_call(msg);
1180 }
1181
1182 int system_macvlan_del(struct device *macvlan)
1183 {
1184 return system_link_del(macvlan->ifname);
1185 }
1186
1187 int system_veth_add(struct device *veth, struct veth_config *cfg)
1188 {
1189 struct nl_msg *msg;
1190 struct ifinfomsg empty_iim = {};
1191 struct nlattr *linkinfo, *data, *veth_info;
1192 int rv;
1193
1194 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1195
1196 if (!msg)
1197 return -1;
1198
1199 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1200
1201 if (cfg->flags & VETH_OPT_MACADDR)
1202 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1203 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1204
1205 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1206 goto nla_put_failure;
1207
1208 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1209
1210 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1211 goto nla_put_failure;
1212
1213 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1214 goto nla_put_failure;
1215
1216 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1217
1218 if (cfg->flags & VETH_OPT_PEER_NAME)
1219 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1220 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1221 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1222
1223 nla_nest_end(msg, veth_info);
1224 nla_nest_end(msg, data);
1225 nla_nest_end(msg, linkinfo);
1226
1227 rv = system_rtnl_call(msg);
1228 if (rv) {
1229 if (cfg->flags & VETH_OPT_PEER_NAME)
1230 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1231 else
1232 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1233 }
1234
1235 return rv;
1236
1237 nla_put_failure:
1238 nlmsg_free(msg);
1239 return -ENOMEM;
1240 }
1241
1242 int system_veth_del(struct device *veth)
1243 {
1244 return system_link_del(veth->ifname);
1245 }
1246
1247 static int system_vlan(struct device *dev, int id)
1248 {
1249 struct vlan_ioctl_args ifr = {
1250 .cmd = SET_VLAN_NAME_TYPE_CMD,
1251 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1252 };
1253
1254 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1255 return -1;
1256
1257 if (id < 0) {
1258 ifr.cmd = DEL_VLAN_CMD;
1259 ifr.u.VID = 0;
1260 } else {
1261 ifr.cmd = ADD_VLAN_CMD;
1262 ifr.u.VID = id;
1263 }
1264 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1265 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1266 }
1267
1268 int system_vlan_add(struct device *dev, int id)
1269 {
1270 return system_vlan(dev, id);
1271 }
1272
1273 int system_vlan_del(struct device *dev)
1274 {
1275 return system_vlan(dev, -1);
1276 }
1277
1278 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1279 {
1280 struct nl_msg *msg;
1281 struct nlattr *linkinfo, *data;
1282 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1283 int rv;
1284
1285 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1286
1287 if (!msg)
1288 return -1;
1289
1290 nlmsg_append(msg, &iim, sizeof(iim), 0);
1291 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1292 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1293
1294 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1295 goto nla_put_failure;
1296
1297 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1298
1299 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1300 goto nla_put_failure;
1301
1302 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1303
1304 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1305 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1306 #else
1307 if(cfg->proto == VLAN_PROTO_8021AD)
1308 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);
1309 #endif
1310
1311 nla_nest_end(msg, data);
1312 nla_nest_end(msg, linkinfo);
1313
1314 rv = system_rtnl_call(msg);
1315 if (rv)
1316 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1317
1318 return rv;
1319
1320 nla_put_failure:
1321 nlmsg_free(msg);
1322 return -ENOMEM;
1323 }
1324
1325 int system_vlandev_del(struct device *vlandev)
1326 {
1327 return system_link_del(vlandev->ifname);
1328 }
1329
1330 void
1331 system_if_get_settings(struct device *dev, struct device_settings *s)
1332 {
1333 struct ifreq ifr;
1334 char buf[10];
1335
1336 memset(&ifr, 0, sizeof(ifr));
1337 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1338
1339 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1340 s->mtu = ifr.ifr_mtu;
1341 s->flags |= DEV_OPT_MTU;
1342 }
1343
1344 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1345 if (s->mtu6 > 0)
1346 s->flags |= DEV_OPT_MTU6;
1347
1348 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1349 s->txqueuelen = ifr.ifr_qlen;
1350 s->flags |= DEV_OPT_TXQUEUELEN;
1351 }
1352
1353 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1354 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1355 s->flags |= DEV_OPT_MACADDR;
1356 }
1357
1358 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1359 s->ipv6 = !strtoul(buf, NULL, 0);
1360 s->flags |= DEV_OPT_IPV6;
1361 }
1362
1363 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1364 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1365 s->flags |= DEV_OPT_PROMISC;
1366
1367 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1368 s->flags |= DEV_OPT_MULTICAST;
1369 }
1370
1371 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1372 s->rpfilter = strtoul(buf, NULL, 0);
1373 s->flags |= DEV_OPT_RPFILTER;
1374 }
1375
1376 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1377 s->acceptlocal = strtoul(buf, NULL, 0);
1378 s->flags |= DEV_OPT_ACCEPTLOCAL;
1379 }
1380
1381 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1382 s->igmpversion = strtoul(buf, NULL, 0);
1383 s->flags |= DEV_OPT_IGMPVERSION;
1384 }
1385
1386 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1387 s->mldversion = strtoul(buf, NULL, 0);
1388 s->flags |= DEV_OPT_MLDVERSION;
1389 }
1390
1391 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1392 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1393 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1394 }
1395
1396 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1397 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1398 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1399 }
1400
1401 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1402 s->neigh4locktime = strtol(buf, NULL, 0);
1403 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1404 }
1405
1406 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1407 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1408 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1409 }
1410
1411 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1412 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1413 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1414 }
1415
1416 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1417 s->dadtransmits = strtoul(buf, NULL, 0);
1418 s->flags |= DEV_OPT_DADTRANSMITS;
1419 }
1420
1421 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1422 s->sendredirects = strtoul(buf, NULL, 0);
1423 s->flags |= DEV_OPT_SENDREDIRECTS;
1424 }
1425 }
1426
1427 void
1428 system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned int apply_mask)
1429 {
1430 struct ifreq ifr;
1431 char buf[12];
1432
1433 memset(&ifr, 0, sizeof(ifr));
1434 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1435 if (s->flags & DEV_OPT_MTU & apply_mask) {
1436 ifr.ifr_mtu = s->mtu;
1437 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1438 s->flags &= ~DEV_OPT_MTU;
1439 }
1440 if (s->flags & DEV_OPT_MTU6 & apply_mask) {
1441 system_update_ipv6_mtu(dev, s->mtu6);
1442 }
1443 if (s->flags & DEV_OPT_TXQUEUELEN & apply_mask) {
1444 ifr.ifr_qlen = s->txqueuelen;
1445 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1446 s->flags &= ~DEV_OPT_TXQUEUELEN;
1447 }
1448 if ((s->flags & DEV_OPT_MACADDR & apply_mask) && !dev->external) {
1449 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1450 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1451 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1452 s->flags &= ~DEV_OPT_MACADDR;
1453 }
1454 if (s->flags & DEV_OPT_IPV6 & apply_mask)
1455 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
1456 if (s->flags & DEV_OPT_PROMISC & apply_mask) {
1457 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1458 !s->promisc ? IFF_PROMISC : 0) < 0)
1459 s->flags &= ~DEV_OPT_PROMISC;
1460 }
1461 if (s->flags & DEV_OPT_RPFILTER & apply_mask) {
1462 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1463 system_set_rpfilter(dev, buf);
1464 }
1465 if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
1466 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
1467 if (s->flags & DEV_OPT_IGMPVERSION & apply_mask) {
1468 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1469 system_set_igmpversion(dev, buf);
1470 }
1471 if (s->flags & DEV_OPT_MLDVERSION & apply_mask) {
1472 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1473 system_set_mldversion(dev, buf);
1474 }
1475 if (s->flags & DEV_OPT_NEIGHREACHABLETIME & apply_mask) {
1476 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1477 system_set_neigh4reachabletime(dev, buf);
1478 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1479 system_set_neigh6reachabletime(dev, buf);
1480 }
1481 if (s->flags & DEV_OPT_NEIGHLOCKTIME & apply_mask) {
1482 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1483 system_set_neigh4locktime(dev, buf);
1484 }
1485 if (s->flags & DEV_OPT_NEIGHGCSTALETIME & apply_mask) {
1486 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1487 system_set_neigh4gcstaletime(dev, buf);
1488 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1489 system_set_neigh6gcstaletime(dev, buf);
1490 }
1491 if (s->flags & DEV_OPT_DADTRANSMITS & apply_mask) {
1492 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1493 system_set_dadtransmits(dev, buf);
1494 }
1495 if (s->flags & DEV_OPT_MULTICAST & apply_mask) {
1496 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1497 !s->multicast ? IFF_MULTICAST : 0) < 0)
1498 s->flags &= ~DEV_OPT_MULTICAST;
1499 }
1500 if (s->flags & DEV_OPT_SENDREDIRECTS & apply_mask)
1501 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
1502 }
1503
1504 int system_if_up(struct device *dev)
1505 {
1506 system_if_get_settings(dev, &dev->orig_settings);
1507 /* Only keep orig settings based on what needs to be set */
1508 dev->orig_settings.valid_flags = dev->orig_settings.flags;
1509 dev->orig_settings.flags &= dev->settings.flags;
1510 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
1511 return system_if_flags(dev->ifname, IFF_UP, 0);
1512 }
1513
1514 int system_if_down(struct device *dev)
1515 {
1516 int ret = system_if_flags(dev->ifname, 0, IFF_UP);
1517 system_if_apply_settings(dev, &dev->orig_settings, dev->orig_settings.flags);
1518 return ret;
1519 }
1520
1521 struct if_check_data {
1522 struct device *dev;
1523 int pending;
1524 int ret;
1525 };
1526
1527 #ifndef IFF_LOWER_UP
1528 #define IFF_LOWER_UP 0x10000
1529 #endif
1530
1531 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
1532 {
1533 struct nlmsghdr *nh = nlmsg_hdr(msg);
1534 struct ifinfomsg *ifi = NLMSG_DATA(nh);
1535 struct if_check_data *chk = (struct if_check_data *)arg;
1536
1537 if (nh->nlmsg_type != RTM_NEWLINK)
1538 return NL_SKIP;
1539
1540 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
1541 device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
1542
1543 return NL_OK;
1544 }
1545
1546 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
1547 {
1548 struct if_check_data *chk = (struct if_check_data *)arg;
1549 chk->pending = 0;
1550 return NL_STOP;
1551 }
1552
1553 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1554 {
1555 struct if_check_data *chk = (struct if_check_data *)arg;
1556
1557 device_set_present(chk->dev, false);
1558 device_set_link(chk->dev, false);
1559 chk->pending = err->error;
1560
1561 return NL_STOP;
1562 }
1563
1564 int system_if_check(struct device *dev)
1565 {
1566 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
1567 struct nl_msg *msg;
1568 struct ifinfomsg ifi = {
1569 .ifi_family = AF_UNSPEC,
1570 .ifi_index = 0,
1571 };
1572 struct if_check_data chk = {
1573 .dev = dev,
1574 .pending = 1,
1575 };
1576 int ret = 1;
1577
1578 if (!cb)
1579 return ret;
1580
1581 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
1582 if (!msg)
1583 goto out;
1584
1585 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
1586 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
1587 goto free;
1588
1589 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
1590 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
1591 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
1592
1593 nl_send_auto_complete(sock_rtnl, msg);
1594 while (chk.pending > 0)
1595 nl_recvmsgs(sock_rtnl, cb);
1596
1597 ret = chk.pending;
1598
1599 free:
1600 nlmsg_free(msg);
1601 out:
1602 nl_cb_put(cb);
1603 return ret;
1604 }
1605
1606 struct device *
1607 system_if_get_parent(struct device *dev)
1608 {
1609 char buf[64], *devname;
1610 int ifindex, iflink, len;
1611 FILE *f;
1612
1613 snprintf(buf, sizeof(buf), "/sys/class/net/%s/iflink", dev->ifname);
1614 f = fopen(buf, "r");
1615 if (!f)
1616 return NULL;
1617
1618 len = fread(buf, 1, sizeof(buf) - 1, f);
1619 fclose(f);
1620
1621 if (len <= 0)
1622 return NULL;
1623
1624 buf[len] = 0;
1625 iflink = strtoul(buf, NULL, 0);
1626 ifindex = system_if_resolve(dev);
1627 if (!iflink || iflink == ifindex)
1628 return NULL;
1629
1630 devname = if_indextoname(iflink, buf);
1631 if (!devname)
1632 return NULL;
1633
1634 return device_get(devname, true);
1635 }
1636
1637 static bool
1638 read_string_file(int dir_fd, const char *file, char *buf, int len)
1639 {
1640 bool ret = false;
1641 char *c;
1642 int fd;
1643
1644 fd = openat(dir_fd, file, O_RDONLY);
1645 if (fd < 0)
1646 return false;
1647
1648 retry:
1649 len = read(fd, buf, len - 1);
1650 if (len < 0) {
1651 if (errno == EINTR)
1652 goto retry;
1653 } else if (len > 0) {
1654 buf[len] = 0;
1655
1656 c = strchr(buf, '\n');
1657 if (c)
1658 *c = 0;
1659
1660 ret = true;
1661 }
1662
1663 close(fd);
1664
1665 return ret;
1666 }
1667
1668 static bool
1669 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
1670 {
1671 char buf[64];
1672 bool ret = false;
1673
1674 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
1675 if (ret)
1676 *val = strtoull(buf, NULL, 0);
1677
1678 return ret;
1679 }
1680
1681 /* Assume advertised flags == supported flags */
1682 static const struct {
1683 uint32_t mask;
1684 const char *name;
1685 } ethtool_link_modes[] = {
1686 { ADVERTISED_10baseT_Half, "10baseT-H" },
1687 { ADVERTISED_10baseT_Full, "10baseT-F" },
1688 { ADVERTISED_100baseT_Half, "100baseT-H" },
1689 { ADVERTISED_100baseT_Full, "100baseT-F" },
1690 { ADVERTISED_1000baseT_Half, "1000baseT-H" },
1691 { ADVERTISED_1000baseT_Full, "1000baseT-F" },
1692 { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
1693 { ADVERTISED_2500baseX_Full, "2500baseX-F" },
1694 { ADVERTISED_10000baseT_Full, "10000baseT-F" },
1695 { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
1696 { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
1697 { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
1698 { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
1699 { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
1700 { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
1701 { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
1702 { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
1703 #ifdef ADVERTISED_56000baseKR4_Full
1704 { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
1705 { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
1706 { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
1707 { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
1708 #endif
1709 };
1710
1711 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
1712 {
1713 int i;
1714 for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
1715 if (mask & ethtool_link_modes[i].mask)
1716 blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
1717 }
1718 }
1719
1720 bool
1721 system_if_force_external(const char *ifname)
1722 {
1723 char buf[64];
1724 struct stat s;
1725
1726 snprintf(buf, sizeof(buf), "/sys/class/net/%s/phy80211", ifname);
1727 return stat(buf, &s) == 0;
1728 }
1729
1730 int
1731 system_if_dump_info(struct device *dev, struct blob_buf *b)
1732 {
1733 struct ethtool_cmd ecmd;
1734 struct ifreq ifr;
1735 char *s;
1736 void *c;
1737
1738 memset(&ecmd, 0, sizeof(ecmd));
1739 memset(&ifr, 0, sizeof(ifr));
1740 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1741 ifr.ifr_data = (caddr_t) &ecmd;
1742 ecmd.cmd = ETHTOOL_GSET;
1743
1744 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
1745 c = blobmsg_open_array(b, "link-advertising");
1746 system_add_link_modes(b, ecmd.advertising);
1747 blobmsg_close_array(b, c);
1748
1749 c = blobmsg_open_array(b, "link-partner-advertising");
1750 system_add_link_modes(b, ecmd.lp_advertising);
1751 blobmsg_close_array(b, c);
1752
1753 c = blobmsg_open_array(b, "link-supported");
1754 system_add_link_modes(b, ecmd.supported);
1755 blobmsg_close_array(b, c);
1756
1757 s = blobmsg_alloc_string_buffer(b, "speed", 8);
1758 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
1759 ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
1760 blobmsg_add_string_buffer(b);
1761
1762 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
1763 }
1764
1765 return 0;
1766 }
1767
1768 int
1769 system_if_dump_stats(struct device *dev, struct blob_buf *b)
1770 {
1771 const char *const counters[] = {
1772 "collisions", "rx_frame_errors", "tx_compressed",
1773 "multicast", "rx_length_errors", "tx_dropped",
1774 "rx_bytes", "rx_missed_errors", "tx_errors",
1775 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
1776 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
1777 "rx_dropped", "tx_aborted_errors", "tx_packets",
1778 "rx_errors", "tx_bytes", "tx_window_errors",
1779 "rx_fifo_errors", "tx_carrier_errors",
1780 };
1781 char buf[64];
1782 int stats_dir;
1783 int i;
1784 uint64_t val = 0;
1785
1786 snprintf(buf, sizeof(buf), "/sys/class/net/%s/statistics", dev->ifname);
1787 stats_dir = open(buf, O_DIRECTORY);
1788 if (stats_dir < 0)
1789 return -1;
1790
1791 for (i = 0; i < ARRAY_SIZE(counters); i++)
1792 if (read_uint64_file(stats_dir, counters[i], &val))
1793 blobmsg_add_u64(b, counters[i], val);
1794
1795 close(stats_dir);
1796 return 0;
1797 }
1798
1799 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
1800 {
1801 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
1802 int alen = v4 ? 4 : 16;
1803 unsigned int flags = 0;
1804 struct ifaddrmsg ifa = {
1805 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
1806 .ifa_prefixlen = addr->mask,
1807 .ifa_index = dev->ifindex,
1808 };
1809
1810 struct nl_msg *msg;
1811 if (cmd == RTM_NEWADDR)
1812 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1813
1814 msg = nlmsg_alloc_simple(cmd, flags);
1815 if (!msg)
1816 return -1;
1817
1818 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
1819 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
1820 if (v4) {
1821 if (addr->broadcast)
1822 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
1823 if (addr->point_to_point)
1824 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
1825 } else {
1826 time_t now = system_get_rtime();
1827 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
1828
1829 if (addr->preferred_until) {
1830 int64_t preferred = addr->preferred_until - now;
1831 if (preferred < 0)
1832 preferred = 0;
1833 else if (preferred > UINT32_MAX)
1834 preferred = UINT32_MAX;
1835
1836 cinfo.ifa_prefered = preferred;
1837 }
1838
1839 if (addr->valid_until) {
1840 int64_t valid = addr->valid_until - now;
1841 if (valid <= 0) {
1842 nlmsg_free(msg);
1843 return -1;
1844 }
1845 else if (valid > UINT32_MAX)
1846 valid = UINT32_MAX;
1847
1848 cinfo.ifa_valid = valid;
1849 }
1850
1851 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
1852
1853 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
1854 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
1855 }
1856
1857 return system_rtnl_call(msg);
1858 }
1859
1860 int system_add_address(struct device *dev, struct device_addr *addr)
1861 {
1862 return system_addr(dev, addr, RTM_NEWADDR);
1863 }
1864
1865 int system_del_address(struct device *dev, struct device_addr *addr)
1866 {
1867 return system_addr(dev, addr, RTM_DELADDR);
1868 }
1869
1870 static int system_rt(struct device *dev, struct device_route *route, int cmd)
1871 {
1872 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
1873 bool have_gw;
1874 unsigned int flags = 0;
1875
1876 if (alen == 4)
1877 have_gw = !!route->nexthop.in.s_addr;
1878 else
1879 have_gw = route->nexthop.in6.s6_addr32[0] ||
1880 route->nexthop.in6.s6_addr32[1] ||
1881 route->nexthop.in6.s6_addr32[2] ||
1882 route->nexthop.in6.s6_addr32[3];
1883
1884 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
1885 ? route->table : RT_TABLE_MAIN;
1886
1887 struct rtmsg rtm = {
1888 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
1889 .rtm_dst_len = route->mask,
1890 .rtm_src_len = route->sourcemask,
1891 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
1892 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
1893 .rtm_scope = RT_SCOPE_NOWHERE,
1894 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
1895 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
1896 };
1897 struct nl_msg *msg;
1898
1899 if (cmd == RTM_NEWROUTE) {
1900 flags |= NLM_F_CREATE | NLM_F_REPLACE;
1901
1902 if (!dev) { // Add null-route
1903 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1904 rtm.rtm_type = RTN_UNREACHABLE;
1905 }
1906 else
1907 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
1908 }
1909
1910 if (route->flags & DEVROUTE_TYPE) {
1911 rtm.rtm_type = route->type;
1912 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
1913 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
1914 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
1915 rtm.rtm_table = RT_TABLE_LOCAL;
1916 }
1917
1918 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
1919 rtm.rtm_scope = RT_SCOPE_HOST;
1920 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
1921 rtm.rtm_type == RTN_ANYCAST) {
1922 rtm.rtm_scope = RT_SCOPE_LINK;
1923 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
1924 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
1925 rtm.rtm_type == RTN_THROW) {
1926 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
1927 dev = NULL;
1928 }
1929 }
1930
1931 msg = nlmsg_alloc_simple(cmd, flags);
1932 if (!msg)
1933 return -1;
1934
1935 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
1936
1937 if (route->mask)
1938 nla_put(msg, RTA_DST, alen, &route->addr);
1939
1940 if (route->sourcemask) {
1941 if (rtm.rtm_family == AF_INET)
1942 nla_put(msg, RTA_PREFSRC, alen, &route->source);
1943 else
1944 nla_put(msg, RTA_SRC, alen, &route->source);
1945 }
1946
1947 if (route->metric > 0)
1948 nla_put_u32(msg, RTA_PRIORITY, route->metric);
1949
1950 if (have_gw)
1951 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
1952
1953 if (dev)
1954 nla_put_u32(msg, RTA_OIF, dev->ifindex);
1955
1956 if (table >= 256)
1957 nla_put_u32(msg, RTA_TABLE, table);
1958
1959 if (route->flags & DEVROUTE_MTU) {
1960 struct nlattr *metrics;
1961
1962 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
1963 goto nla_put_failure;
1964
1965 nla_put_u32(msg, RTAX_MTU, route->mtu);
1966
1967 nla_nest_end(msg, metrics);
1968 }
1969
1970 return system_rtnl_call(msg);
1971
1972 nla_put_failure:
1973 nlmsg_free(msg);
1974 return -ENOMEM;
1975 }
1976
1977 int system_add_route(struct device *dev, struct device_route *route)
1978 {
1979 return system_rt(dev, route, RTM_NEWROUTE);
1980 }
1981
1982 int system_del_route(struct device *dev, struct device_route *route)
1983 {
1984 return system_rt(dev, route, RTM_DELROUTE);
1985 }
1986
1987 int system_flush_routes(void)
1988 {
1989 const char *names[] = {
1990 "/proc/sys/net/ipv4/route/flush",
1991 "/proc/sys/net/ipv6/route/flush"
1992 };
1993 int fd, i;
1994
1995 for (i = 0; i < ARRAY_SIZE(names); i++) {
1996 fd = open(names[i], O_WRONLY);
1997 if (fd < 0)
1998 continue;
1999
2000 if (write(fd, "-1", 2)) {}
2001 close(fd);
2002 }
2003 return 0;
2004 }
2005
2006 bool system_resolve_rt_type(const char *type, unsigned int *id)
2007 {
2008 return system_rtn_aton(type, id);
2009 }
2010
2011 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2012 {
2013 FILE *f;
2014 char *e, buf[128];
2015 unsigned int n, proto = 256;
2016 n = strtoul(type, &e, 0);
2017 if (!*e && e != type)
2018 proto = n;
2019 else if (!strcmp(type, "unspec"))
2020 proto = RTPROT_UNSPEC;
2021 else if (!strcmp(type, "kernel"))
2022 proto = RTPROT_KERNEL;
2023 else if (!strcmp(type, "boot"))
2024 proto = RTPROT_BOOT;
2025 else if (!strcmp(type, "static"))
2026 proto = RTPROT_STATIC;
2027 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2028 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2029 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2030 continue;
2031
2032 n = strtoul(e, NULL, 10);
2033 e = strtok(NULL, " \t\n");
2034
2035 if (e && !strcmp(e, type)) {
2036 proto = n;
2037 break;
2038 }
2039 }
2040 fclose(f);
2041 }
2042
2043 if (proto > 255)
2044 return false;
2045
2046 *id = proto;
2047 return true;
2048 }
2049
2050 bool system_resolve_rt_table(const char *name, unsigned int *id)
2051 {
2052 FILE *f;
2053 char *e, buf[128];
2054 unsigned int n, table = RT_TABLE_UNSPEC;
2055
2056 /* first try to parse table as number */
2057 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2058 table = n;
2059
2060 /* handle well known aliases */
2061 else if (!strcmp(name, "default"))
2062 table = RT_TABLE_DEFAULT;
2063 else if (!strcmp(name, "main"))
2064 table = RT_TABLE_MAIN;
2065 else if (!strcmp(name, "local"))
2066 table = RT_TABLE_LOCAL;
2067
2068 /* try to look up name in /etc/iproute2/rt_tables */
2069 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2070 {
2071 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2072 {
2073 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2074 continue;
2075
2076 n = strtoul(e, NULL, 10);
2077 e = strtok(NULL, " \t\n");
2078
2079 if (e && !strcmp(e, name))
2080 {
2081 table = n;
2082 break;
2083 }
2084 }
2085
2086 fclose(f);
2087 }
2088
2089 if (table == RT_TABLE_UNSPEC)
2090 return false;
2091
2092 *id = table;
2093 return true;
2094 }
2095
2096 bool system_is_default_rt_table(unsigned int id)
2097 {
2098 return (id == RT_TABLE_MAIN);
2099 }
2100
2101 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2102 {
2103 char *e;
2104 unsigned int n;
2105
2106 if (!strcmp(filter, "strict"))
2107 n = 1;
2108 else if (!strcmp(filter, "loose"))
2109 n = 2;
2110 else {
2111 n = strtoul(filter, &e, 0);
2112 if (*e || e == filter || n > 2)
2113 return false;
2114 }
2115
2116 *id = n;
2117 return true;
2118 }
2119
2120 static int system_iprule(struct iprule *rule, int cmd)
2121 {
2122 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2123
2124 struct nl_msg *msg;
2125 struct rtmsg rtm = {
2126 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2127 .rtm_protocol = RTPROT_STATIC,
2128 .rtm_scope = RT_SCOPE_UNIVERSE,
2129 .rtm_table = RT_TABLE_UNSPEC,
2130 .rtm_type = RTN_UNSPEC,
2131 .rtm_flags = 0,
2132 };
2133
2134 if (cmd == RTM_NEWRULE)
2135 rtm.rtm_type = RTN_UNICAST;
2136
2137 if (rule->invert)
2138 rtm.rtm_flags |= FIB_RULE_INVERT;
2139
2140 if (rule->flags & IPRULE_SRC)
2141 rtm.rtm_src_len = rule->src_mask;
2142
2143 if (rule->flags & IPRULE_DEST)
2144 rtm.rtm_dst_len = rule->dest_mask;
2145
2146 if (rule->flags & IPRULE_TOS)
2147 rtm.rtm_tos = rule->tos;
2148
2149 if (rule->flags & IPRULE_LOOKUP) {
2150 if (rule->lookup < 256)
2151 rtm.rtm_table = rule->lookup;
2152 }
2153
2154 if (rule->flags & IPRULE_ACTION)
2155 rtm.rtm_type = rule->action;
2156 else if (rule->flags & IPRULE_GOTO)
2157 rtm.rtm_type = FR_ACT_GOTO;
2158 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2159 rtm.rtm_type = FR_ACT_NOP;
2160
2161 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2162
2163 if (!msg)
2164 return -1;
2165
2166 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2167
2168 if (rule->flags & IPRULE_IN)
2169 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2170
2171 if (rule->flags & IPRULE_OUT)
2172 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2173
2174 if (rule->flags & IPRULE_SRC)
2175 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2176
2177 if (rule->flags & IPRULE_DEST)
2178 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2179
2180 if (rule->flags & IPRULE_PRIORITY)
2181 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2182 else if (cmd == RTM_NEWRULE)
2183 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2184
2185 if (rule->flags & IPRULE_FWMARK)
2186 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2187
2188 if (rule->flags & IPRULE_FWMASK)
2189 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2190
2191 if (rule->flags & IPRULE_LOOKUP) {
2192 if (rule->lookup >= 256)
2193 nla_put_u32(msg, FRA_TABLE, rule->lookup);
2194 }
2195
2196 if (rule->flags & IPRULE_SUP_PREFIXLEN)
2197 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2198
2199 if (rule->flags & IPRULE_GOTO)
2200 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2201
2202 return system_rtnl_call(msg);
2203 }
2204
2205 int system_add_iprule(struct iprule *rule)
2206 {
2207 return system_iprule(rule, RTM_NEWRULE);
2208 }
2209
2210 int system_del_iprule(struct iprule *rule)
2211 {
2212 return system_iprule(rule, RTM_DELRULE);
2213 }
2214
2215 int system_flush_iprules(void)
2216 {
2217 int rv = 0;
2218 struct iprule rule;
2219
2220 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2221 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2222
2223 memset(&rule, 0, sizeof(rule));
2224
2225
2226 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2227
2228 rule.priority = 0;
2229 rule.lookup = RT_TABLE_LOCAL;
2230 rv |= system_iprule(&rule, RTM_NEWRULE);
2231
2232 rule.priority = 32766;
2233 rule.lookup = RT_TABLE_MAIN;
2234 rv |= system_iprule(&rule, RTM_NEWRULE);
2235
2236 rule.priority = 32767;
2237 rule.lookup = RT_TABLE_DEFAULT;
2238 rv |= system_iprule(&rule, RTM_NEWRULE);
2239
2240
2241 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2242
2243 rule.priority = 0;
2244 rule.lookup = RT_TABLE_LOCAL;
2245 rv |= system_iprule(&rule, RTM_NEWRULE);
2246
2247 rule.priority = 32766;
2248 rule.lookup = RT_TABLE_MAIN;
2249 rv |= system_iprule(&rule, RTM_NEWRULE);
2250
2251 return rv;
2252 }
2253
2254 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2255 {
2256 return system_rtn_aton(action, id);
2257 }
2258
2259 time_t system_get_rtime(void)
2260 {
2261 struct timespec ts;
2262 struct timeval tv;
2263
2264 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts) == 0)
2265 return ts.tv_sec;
2266
2267 if (gettimeofday(&tv, NULL) == 0)
2268 return tv.tv_sec;
2269
2270 return 0;
2271 }
2272
2273 #ifndef IP_DF
2274 #define IP_DF 0x4000
2275 #endif
2276
2277 static int tunnel_ioctl(const char *name, int cmd, void *p)
2278 {
2279 struct ifreq ifr;
2280
2281 memset(&ifr, 0, sizeof(ifr));
2282 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2283 ifr.ifr_ifru.ifru_data = p;
2284 return ioctl(sock_ioctl, cmd, &ifr);
2285 }
2286
2287 #ifdef IFLA_IPTUN_MAX
2288 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2289 struct blob_attr **tb)
2290 {
2291 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2292 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2293 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2294 struct blob_attr *cur;
2295 int ret = 0, ttl = 0;
2296
2297 if (!nlm)
2298 return -1;
2299
2300 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2301 nla_put_string(nlm, IFLA_IFNAME, name);
2302
2303 if (link)
2304 nla_put_u32(nlm, IFLA_LINK, link);
2305
2306 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2307 if (!linkinfo) {
2308 ret = -ENOMEM;
2309 goto failure;
2310 }
2311
2312 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
2313 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2314 if (!infodata) {
2315 ret = -ENOMEM;
2316 goto failure;
2317 }
2318
2319 if (link)
2320 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
2321
2322 if ((cur = tb[TUNNEL_ATTR_TTL]))
2323 ttl = blobmsg_get_u32(cur);
2324
2325 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
2326 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
2327
2328 struct in6_addr in6buf;
2329 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2330 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2331 ret = -EINVAL;
2332 goto failure;
2333 }
2334 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
2335 }
2336
2337 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2338 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2339 ret = -EINVAL;
2340 goto failure;
2341 }
2342 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
2343 }
2344
2345 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2346 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
2347 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
2348
2349 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
2350 blobmsg_data(cur), blobmsg_len(cur));
2351
2352 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
2353 char *str = blobmsg_get_string(cur);
2354
2355 if (strcmp(str, "ignore")) {
2356 char *e;
2357 unsigned encap_limit = strtoul(str, &e, 0);
2358
2359 if (e == str || *e || encap_limit > 255) {
2360 ret = -EINVAL;
2361 goto failure;
2362 }
2363
2364 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
2365 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
2366 }
2367 }
2368
2369 #ifdef IFLA_IPTUN_FMR_MAX
2370 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
2371 struct blob_attr *rcur;
2372 unsigned rrem, fmrcnt = 0;
2373 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
2374
2375 if (!fmrs) {
2376 ret = -ENOMEM;
2377 goto failure;
2378 }
2379
2380 blobmsg_for_each_attr(rcur, cur, rrem) {
2381 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
2382 struct in6_addr ip6prefix;
2383 struct in_addr ip4prefix;
2384 unsigned ip4len, ip6len, ealen, offset;
2385
2386 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
2387 blobmsg_data(rcur), blobmsg_len(rcur));
2388
2389 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
2390 !parse_ip_and_netmask(AF_INET6,
2391 blobmsg_data(tb_cur), &ip6prefix,
2392 &ip6len)) {
2393 ret = -EINVAL;
2394 goto failure;
2395 }
2396
2397 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
2398 !parse_ip_and_netmask(AF_INET,
2399 blobmsg_data(tb_cur), &ip4prefix,
2400 &ip4len)) {
2401 ret = -EINVAL;
2402 goto failure;
2403 }
2404
2405 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
2406 ret = -EINVAL;
2407 goto failure;
2408 }
2409 ealen = blobmsg_get_u32(tb_cur);
2410
2411 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
2412 ret = -EINVAL;
2413 goto failure;
2414 }
2415 offset = blobmsg_get_u32(tb_cur);
2416
2417 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
2418 if (!rule) {
2419 ret = -ENOMEM;
2420 goto failure;
2421 }
2422
2423 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
2424 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
2425 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
2426 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
2427 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
2428 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
2429
2430 nla_nest_end(nlm, rule);
2431 }
2432
2433 nla_nest_end(nlm, fmrs);
2434 }
2435 #endif
2436 if (tun_flags)
2437 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
2438 }
2439
2440 nla_nest_end(nlm, infodata);
2441 nla_nest_end(nlm, linkinfo);
2442
2443 return system_rtnl_call(nlm);
2444
2445 failure:
2446 nlmsg_free(nlm);
2447 return ret;
2448 }
2449 #endif
2450
2451 #ifdef IFLA_IPTUN_MAX
2452 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
2453 static int system_add_gre_tunnel(const char *name, const char *kind,
2454 const unsigned int link, struct blob_attr **tb, bool v6)
2455 {
2456 struct nl_msg *nlm;
2457 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2458 struct blob_attr *cur;
2459 uint32_t ikey = 0, okey = 0, flags = 0, flowinfo = 0;
2460 uint16_t iflags = 0, oflags = 0;
2461 uint8_t tos = 0;
2462 int ret = 0, ttl = 0;
2463
2464 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2465 if (!nlm)
2466 return -1;
2467
2468 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2469 nla_put_string(nlm, IFLA_IFNAME, name);
2470
2471 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2472 if (!linkinfo) {
2473 ret = -ENOMEM;
2474 goto failure;
2475 }
2476
2477 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2478 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2479 if (!infodata) {
2480 ret = -ENOMEM;
2481 goto failure;
2482 }
2483
2484 if (link)
2485 nla_put_u32(nlm, IFLA_GRE_LINK, link);
2486
2487 if ((cur = tb[TUNNEL_ATTR_TTL]))
2488 ttl = blobmsg_get_u32(cur);
2489
2490 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2491 char *str = blobmsg_get_string(cur);
2492 if (strcmp(str, "inherit")) {
2493 unsigned uval;
2494
2495 if (!system_tos_aton(str, &uval)) {
2496 ret = -EINVAL;
2497 goto failure;
2498 }
2499
2500 if (v6)
2501 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
2502 else
2503 tos = uval;
2504 } else {
2505 if (v6)
2506 flags |= IP6_TNL_F_USE_ORIG_TCLASS;
2507 else
2508 tos = 1;
2509 }
2510 }
2511
2512 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2513 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
2514
2515 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
2516 blobmsg_data(cur), blobmsg_len(cur));
2517
2518 if ((cur = tb_data[GRE_DATA_IKEY])) {
2519 if ((ikey = blobmsg_get_u32(cur)))
2520 iflags |= GRE_KEY;
2521 }
2522
2523 if ((cur = tb_data[GRE_DATA_OKEY])) {
2524 if ((okey = blobmsg_get_u32(cur)))
2525 oflags |= GRE_KEY;
2526 }
2527
2528 if ((cur = tb_data[GRE_DATA_ICSUM])) {
2529 if (blobmsg_get_bool(cur))
2530 iflags |= GRE_CSUM;
2531 }
2532
2533 if ((cur = tb_data[GRE_DATA_OCSUM])) {
2534 if (blobmsg_get_bool(cur))
2535 oflags |= GRE_CSUM;
2536 }
2537
2538 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
2539 if (blobmsg_get_bool(cur))
2540 iflags |= GRE_SEQ;
2541 }
2542
2543 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
2544 if (blobmsg_get_bool(cur))
2545 oflags |= GRE_SEQ;
2546 }
2547 }
2548
2549 if (v6) {
2550 struct in6_addr in6buf;
2551 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2552 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2553 ret = -EINVAL;
2554 goto failure;
2555 }
2556 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
2557 }
2558
2559 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2560 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2561 ret = -EINVAL;
2562 goto failure;
2563 }
2564 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
2565 }
2566 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, 4);
2567
2568 if (flowinfo)
2569 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
2570
2571 if (flags)
2572 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags);
2573
2574 if (!ttl)
2575 ttl = 64;
2576 } else {
2577 struct in_addr inbuf;
2578 bool set_df = true;
2579
2580 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2581 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2582 ret = -EINVAL;
2583 goto failure;
2584 }
2585 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
2586 }
2587
2588 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2589 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2590 ret = -EINVAL;
2591 goto failure;
2592 }
2593 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
2594
2595 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
2596 if (!okey) {
2597 okey = inbuf.s_addr;
2598 oflags |= GRE_KEY;
2599 }
2600
2601 if (!ikey) {
2602 ikey = inbuf.s_addr;
2603 iflags |= GRE_KEY;
2604 }
2605 }
2606 }
2607
2608 if ((cur = tb[TUNNEL_ATTR_DF]))
2609 set_df = blobmsg_get_bool(cur);
2610
2611 if (!set_df) {
2612 /* ttl != 0 and nopmtudisc are incompatible */
2613 if (ttl) {
2614 ret = -EINVAL;
2615 goto failure;
2616 }
2617 } else if (!ttl)
2618 ttl = 64;
2619
2620 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
2621
2622 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
2623 }
2624
2625 if (ttl)
2626 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
2627
2628 if (oflags)
2629 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
2630
2631 if (iflags)
2632 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
2633
2634 if (okey)
2635 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
2636
2637 if (ikey)
2638 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
2639
2640 nla_nest_end(nlm, infodata);
2641 nla_nest_end(nlm, linkinfo);
2642
2643 return system_rtnl_call(nlm);
2644
2645 failure:
2646 nlmsg_free(nlm);
2647 return ret;
2648 }
2649 #endif
2650
2651 #ifdef IFLA_VTI_MAX
2652 static int system_add_vti_tunnel(const char *name, const char *kind,
2653 const unsigned int link, struct blob_attr **tb, bool v6)
2654 {
2655 struct nl_msg *nlm;
2656 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
2657 struct blob_attr *cur;
2658 int ret = 0;
2659
2660 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2661 if (!nlm)
2662 return -1;
2663
2664 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
2665 nla_put_string(nlm, IFLA_IFNAME, name);
2666
2667 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
2668 if (!linkinfo) {
2669 ret = -ENOMEM;
2670 goto failure;
2671 }
2672
2673 nla_put_string(nlm, IFLA_INFO_KIND, kind);
2674 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
2675 if (!infodata) {
2676 ret = -ENOMEM;
2677 goto failure;
2678 }
2679
2680 if (link)
2681 nla_put_u32(nlm, IFLA_VTI_LINK, link);
2682
2683 if (v6) {
2684 struct in6_addr in6buf;
2685 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2686 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2687 ret = -EINVAL;
2688 goto failure;
2689 }
2690 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
2691 }
2692
2693 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2694 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2695 ret = -EINVAL;
2696 goto failure;
2697 }
2698 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
2699 }
2700
2701 } else {
2702 struct in_addr inbuf;
2703
2704 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2705 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2706 ret = -EINVAL;
2707 goto failure;
2708 }
2709 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
2710 }
2711
2712 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2713 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2714 ret = -EINVAL;
2715 goto failure;
2716 }
2717 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
2718 }
2719
2720 }
2721
2722 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2723 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
2724 uint32_t ikey = 0, okey = 0;
2725
2726 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
2727 blobmsg_data(cur), blobmsg_len(cur));
2728
2729 if ((cur = tb_data[VTI_DATA_IKEY])) {
2730 if ((ikey = blobmsg_get_u32(cur)))
2731 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
2732 }
2733
2734 if ((cur = tb_data[VTI_DATA_OKEY])) {
2735 if ((okey = blobmsg_get_u32(cur)))
2736 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
2737 }
2738 }
2739
2740 nla_nest_end(nlm, infodata);
2741 nla_nest_end(nlm, linkinfo);
2742
2743 return system_rtnl_call(nlm);
2744
2745 failure:
2746 nlmsg_free(nlm);
2747 return ret;
2748 }
2749 #endif
2750
2751 #ifdef IFLA_VXLAN_MAX
2752 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
2753 {
2754 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
2755 struct nl_msg *msg;
2756 struct nlattr *linkinfo, *data;
2757 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
2758 struct blob_attr *cur;
2759 int ret = 0;
2760
2761 if ((cur = tb[TUNNEL_ATTR_DATA]))
2762 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
2763 blobmsg_data(cur), blobmsg_len(cur));
2764 else
2765 return -EINVAL;
2766
2767 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
2768
2769 if (!msg)
2770 return -1;
2771
2772 nlmsg_append(msg, &iim, sizeof(iim), 0);
2773
2774 nla_put_string(msg, IFLA_IFNAME, name);
2775
2776 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
2777 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
2778 if (!ea) {
2779 ret = -EINVAL;
2780 goto failure;
2781 }
2782
2783 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
2784 }
2785
2786 if ((cur = tb[TUNNEL_ATTR_MTU])) {
2787 uint32_t mtu = blobmsg_get_u32(cur);
2788 nla_put_u32(msg, IFLA_MTU, mtu);
2789 }
2790
2791 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
2792 ret = -ENOMEM;
2793 goto failure;
2794 }
2795
2796 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
2797
2798 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
2799 ret = -ENOMEM;
2800 goto failure;
2801 }
2802
2803 if (link)
2804 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
2805
2806 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
2807 uint32_t id = blobmsg_get_u32(cur);
2808 if (id >= (1u << 24) - 1) {
2809 ret = -EINVAL;
2810 goto failure;
2811 }
2812
2813 nla_put_u32(msg, IFLA_VXLAN_ID, id);
2814 }
2815
2816 if (v6) {
2817 struct in6_addr in6buf;
2818 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2819 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2820 ret = -EINVAL;
2821 goto failure;
2822 }
2823 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
2824 }
2825
2826 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2827 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
2828 ret = -EINVAL;
2829 goto failure;
2830 }
2831 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
2832 }
2833 } else {
2834 struct in_addr inbuf;
2835
2836 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
2837 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2838 ret = -EINVAL;
2839 goto failure;
2840 }
2841 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
2842 }
2843
2844 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
2845 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
2846 ret = -EINVAL;
2847 goto failure;
2848 }
2849 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
2850 }
2851 }
2852
2853 uint32_t port = 4789;
2854 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
2855 port = blobmsg_get_u32(cur);
2856 if (port < 1 || port > 65535) {
2857 ret = -EINVAL;
2858 goto failure;
2859 }
2860 }
2861 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
2862
2863 if ((cur = tb_data[VXLAN_DATA_ATTR_RXCSUM])) {
2864 bool rxcsum = blobmsg_get_bool(cur);
2865 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, !rxcsum);
2866 }
2867
2868 if ((cur = tb_data[VXLAN_DATA_ATTR_TXCSUM])) {
2869 bool txcsum = blobmsg_get_bool(cur);
2870 nla_put_u8(msg, IFLA_VXLAN_UDP_CSUM, txcsum);
2871 nla_put_u8(msg, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, !txcsum);
2872 }
2873
2874 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2875 char *str = blobmsg_get_string(cur);
2876 unsigned tos = 1;
2877
2878 if (strcmp(str, "inherit")) {
2879 if (!system_tos_aton(str, &tos)) {
2880 ret = -EINVAL;
2881 goto failure;
2882 }
2883 }
2884
2885 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
2886 }
2887
2888 if ((cur = tb[TUNNEL_ATTR_TTL])) {
2889 uint32_t ttl = blobmsg_get_u32(cur);
2890 if (ttl < 1 || ttl > 255) {
2891 ret = -EINVAL;
2892 goto failure;
2893 }
2894
2895 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
2896 }
2897
2898 nla_nest_end(msg, data);
2899 nla_nest_end(msg, linkinfo);
2900
2901 ret = system_rtnl_call(msg);
2902 if (ret)
2903 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
2904
2905 return ret;
2906
2907 failure:
2908 nlmsg_free(msg);
2909 return ret;
2910 }
2911 #endif
2912
2913 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
2914 {
2915 struct blob_attr *cur;
2916 int ret = 0;
2917
2918 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
2919 return -1;
2920
2921 #ifdef SIOCADD6RD
2922 if ((cur = tb[TUNNEL_ATTR_DATA])) {
2923 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
2924 unsigned int mask;
2925 struct ip_tunnel_6rd p6;
2926
2927 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
2928 blobmsg_data(cur), blobmsg_len(cur));
2929
2930 memset(&p6, 0, sizeof(p6));
2931
2932 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
2933 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
2934 &p6.prefix, &mask) || mask > 128) {
2935 ret = -EINVAL;
2936 goto failure;
2937 }
2938
2939 p6.prefixlen = mask;
2940 }
2941
2942 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
2943 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
2944 &p6.relay_prefix, &mask) || mask > 32) {
2945 ret = -EINVAL;
2946 goto failure;
2947 }
2948
2949 p6.relay_prefixlen = mask;
2950 }
2951
2952 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
2953 ret = -1;
2954 goto failure;
2955 }
2956 }
2957 #endif
2958
2959 return ret;
2960
2961 failure:
2962 __system_del_ip_tunnel(name, tb);
2963 return ret;
2964 }
2965
2966 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
2967 {
2968 struct blob_attr *cur;
2969 bool set_df = true;
2970 struct ip_tunnel_parm p = {
2971 .link = link,
2972 .iph = {
2973 .version = 4,
2974 .ihl = 5,
2975 .protocol = proto,
2976 }
2977 };
2978
2979 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
2980 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
2981 return -EINVAL;
2982
2983 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
2984 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
2985 return -EINVAL;
2986
2987 if ((cur = tb[TUNNEL_ATTR_DF]))
2988 set_df = blobmsg_get_bool(cur);
2989
2990 if ((cur = tb[TUNNEL_ATTR_TTL]))
2991 p.iph.ttl = blobmsg_get_u32(cur);
2992
2993 if ((cur = tb[TUNNEL_ATTR_TOS])) {
2994 char *str = blobmsg_get_string(cur);
2995 if (strcmp(str, "inherit")) {
2996 unsigned uval;
2997
2998 if (!system_tos_aton(str, &uval))
2999 return -EINVAL;
3000
3001 p.iph.tos = uval;
3002 } else
3003 p.iph.tos = 1;
3004 }
3005
3006 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3007 /* ttl !=0 and nopmtudisc are incompatible */
3008 if (p.iph.ttl && p.iph.frag_off == 0)
3009 return -EINVAL;
3010
3011 strncpy(p.name, name, sizeof(p.name) - 1);
3012
3013 switch (p.iph.protocol) {
3014 case IPPROTO_IPIP:
3015 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3016 case IPPROTO_IPV6:
3017 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3018 default:
3019 break;
3020 }
3021 return -1;
3022 }
3023
3024 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3025 {
3026 struct blob_attr *cur;
3027 const char *str;
3028
3029 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3030 return -EINVAL;
3031 str = blobmsg_data(cur);
3032
3033 if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3034 !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3035 !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3036 !strcmp(str, "vxlan") || !strcmp(str, "vxlan6"))
3037 return system_link_del(name);
3038 else
3039 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3040 }
3041
3042 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3043 {
3044 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3045
3046 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3047 blob_data(attr), blob_len(attr));
3048
3049 return __system_del_ip_tunnel(name, tb);
3050 }
3051
3052 int system_update_ipv6_mtu(struct device *dev, int mtu)
3053 {
3054 int ret = -1;
3055 char buf[64];
3056 int fd;
3057
3058 snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/conf/%s/mtu",
3059 dev->ifname);
3060
3061 fd = open(buf, O_RDWR);
3062 if (fd < 0)
3063 return ret;
3064
3065 if (!mtu) {
3066 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3067 if (len < 0)
3068 goto out;
3069
3070 buf[len] = 0;
3071 ret = atoi(buf);
3072 } else {
3073 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3074 ret = mtu;
3075 }
3076
3077 out:
3078 close(fd);
3079 return ret;
3080 }
3081
3082 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3083 {
3084 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3085 struct blob_attr *cur;
3086 const char *str;
3087
3088 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3089 blob_data(attr), blob_len(attr));
3090
3091 __system_del_ip_tunnel(name, tb);
3092
3093 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3094 return -EINVAL;
3095 str = blobmsg_data(cur);
3096
3097 unsigned int ttl = 0;
3098 if ((cur = tb[TUNNEL_ATTR_TTL])) {
3099 ttl = blobmsg_get_u32(cur);
3100 if (ttl > 255)
3101 return -EINVAL;
3102 }
3103
3104 unsigned int link = 0;
3105 if ((cur = tb[TUNNEL_ATTR_LINK])) {
3106 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3107 if (!iface)
3108 return -EINVAL;
3109
3110 if (iface->l3_dev.dev)
3111 link = iface->l3_dev.dev->ifindex;
3112 }
3113
3114 if (!strcmp(str, "sit"))
3115 return system_add_sit_tunnel(name, link, tb);
3116 #ifdef IFLA_IPTUN_MAX
3117 else if (!strcmp(str, "ipip6")) {
3118 return system_add_ip6_tunnel(name, link, tb);
3119 } else if (!strcmp(str, "greip")) {
3120 return system_add_gre_tunnel(name, "gre", link, tb, false);
3121 } else if (!strcmp(str, "gretapip")) {
3122 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3123 } else if (!strcmp(str, "greip6")) {
3124 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3125 } else if (!strcmp(str, "gretapip6")) {
3126 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3127 #ifdef IFLA_VTI_MAX
3128 } else if (!strcmp(str, "vtiip")) {
3129 return system_add_vti_tunnel(name, "vti", link, tb, false);
3130 } else if (!strcmp(str, "vtiip6")) {
3131 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3132 #endif
3133 #ifdef IFLA_VXLAN_MAX
3134 } else if(!strcmp(str, "vxlan")) {
3135 return system_add_vxlan(name, link, tb, false);
3136 } else if(!strcmp(str, "vxlan6")) {
3137 return system_add_vxlan(name, link, tb, true);
3138 #endif
3139 #endif
3140 } else if (!strcmp(str, "ipip")) {
3141 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3142 }
3143 else
3144 return -EINVAL;
3145
3146 return 0;
3147 }
OpenWrt Network interface configuration daemon