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bb23404ed87c2c3bbff4d774ec5a51c24761101e
[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 <limits.h>
30 #include <arpa/inet.h>
31 #include <netinet/in.h>
32 #include <netinet/ether.h>
33
34 #include <linux/rtnetlink.h>
35 #include <linux/neighbour.h>
36 #include <linux/sockios.h>
37 #include <linux/ip.h>
38 #include <linux/if_addr.h>
39 #include <linux/if_link.h>
40 #include <linux/if_vlan.h>
41 #include <linux/if_bridge.h>
42 #include <linux/if_tunnel.h>
43 #include <linux/ip6_tunnel.h>
44 #include <linux/ethtool.h>
45 #include <linux/fib_rules.h>
46 #include <linux/veth.h>
47 #include <linux/version.h>
48
49 #include <sched.h>
50
51 #include "ethtool-modes.h"
52
53 #ifndef RTN_FAILED_POLICY
54 #define RTN_FAILED_POLICY 12
55 #endif
56
57 #ifndef IFA_F_NOPREFIXROUTE
58 #define IFA_F_NOPREFIXROUTE 0x200
59 #endif
60
61 #ifndef IFA_FLAGS
62 #define IFA_FLAGS (IFA_MULTICAST + 1)
63 #endif
64
65 #include <string.h>
66 #include <fcntl.h>
67 #include <glob.h>
68 #include <time.h>
69 #include <unistd.h>
70
71 #include <netlink/msg.h>
72 #include <netlink/attr.h>
73 #include <netlink/socket.h>
74 #include <libubox/uloop.h>
75
76 #include "netifd.h"
77 #include "device.h"
78 #include "system.h"
79 #include "utils.h"
80
81 struct event_socket {
82 struct uloop_fd uloop;
83 struct nl_sock *sock;
84 int bufsize;
85 };
86
87 static int sock_ioctl = -1;
88 static struct nl_sock *sock_rtnl = NULL;
89
90 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
91 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
92 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
93 const unsigned int link, struct blob_attr **tb);
94
95 static char dev_buf[256];
96 static const char *proc_path = "/proc";
97 static const char *sysfs_path = "/sys";
98
99 struct netdev_type {
100 unsigned short id;
101 const char *name;
102 };
103
104 static const struct netdev_type netdev_types[] = {
105 {ARPHRD_NETROM, "netrom"},
106 {ARPHRD_ETHER, "ethernet"},
107 {ARPHRD_EETHER, "eethernet"},
108 {ARPHRD_AX25, "ax25"},
109 {ARPHRD_PRONET, "pronet"},
110 {ARPHRD_CHAOS, "chaos"},
111 {ARPHRD_IEEE802, "ieee802"},
112 {ARPHRD_ARCNET, "arcnet"},
113 {ARPHRD_APPLETLK, "appletlk"},
114 {ARPHRD_DLCI, "dlci"},
115 {ARPHRD_ATM, "atm"},
116 {ARPHRD_METRICOM, "metricom"},
117 {ARPHRD_IEEE1394, "ieee1394"},
118 {ARPHRD_EUI64, "eui64"},
119 {ARPHRD_INFINIBAND, "infiniband"},
120 {ARPHRD_SLIP, "slip"},
121 {ARPHRD_CSLIP, "cslip"},
122 {ARPHRD_SLIP6, "slip6"},
123 {ARPHRD_CSLIP6, "cslip6"},
124 {ARPHRD_RSRVD, "rsrvd"},
125 {ARPHRD_ADAPT, "adapt"},
126 {ARPHRD_ROSE, "rose"},
127 {ARPHRD_X25, "x25"},
128 {ARPHRD_HWX25, "hwx25"},
129 {ARPHRD_PPP, "ppp"},
130 {ARPHRD_CISCO, "cisco"},
131 {ARPHRD_LAPB, "lapb"},
132 {ARPHRD_DDCMP, "ddcmp"},
133 {ARPHRD_RAWHDLC, "rawhdlc"},
134 {ARPHRD_TUNNEL, "tunnel"},
135 {ARPHRD_TUNNEL6, "tunnel6"},
136 {ARPHRD_FRAD, "frad"},
137 {ARPHRD_SKIP, "skip"},
138 {ARPHRD_LOOPBACK, "loopback"},
139 {ARPHRD_LOCALTLK, "localtlk"},
140 {ARPHRD_FDDI, "fddi"},
141 {ARPHRD_BIF, "bif"},
142 {ARPHRD_SIT, "sit"},
143 {ARPHRD_IPDDP, "ipddp"},
144 {ARPHRD_IPGRE, "ipgre"},
145 {ARPHRD_PIMREG,"pimreg"},
146 {ARPHRD_HIPPI, "hippi"},
147 {ARPHRD_ASH, "ash"},
148 {ARPHRD_ECONET, "econet"},
149 {ARPHRD_IRDA, "irda"},
150 {ARPHRD_FCPP, "fcpp"},
151 {ARPHRD_FCAL, "fcal"},
152 {ARPHRD_FCPL, "fcpl"},
153 {ARPHRD_FCFABRIC, "fcfabric"},
154 {ARPHRD_IEEE80211, "ieee80211"},
155 {ARPHRD_IEEE80211_PRISM, "ie80211-prism"},
156 {ARPHRD_IEEE80211_RADIOTAP, "ieee80211-radiotap"},
157 #ifdef ARPHRD_PHONET
158 {ARPHRD_PHONET, "phonet"},
159 #endif
160 #ifdef ARPHRD_PHONET_PIPE
161 {ARPHRD_PHONET_PIPE, "phonet-pipe"},
162 #endif
163 {ARPHRD_IEEE802154, "ieee802154"},
164 {ARPHRD_VOID, "void"},
165 {ARPHRD_NONE, "none"}
166 };
167
168 static void
169 handler_nl_event(struct uloop_fd *u, unsigned int events)
170 {
171 struct event_socket *ev = container_of(u, struct event_socket, uloop);
172 int err;
173 socklen_t errlen = sizeof(err);
174
175 if (!u->error) {
176 nl_recvmsgs_default(ev->sock);
177 return;
178 }
179
180 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
181 goto abort;
182
183 switch(err) {
184 case ENOBUFS:
185 /* Increase rx buffer size on netlink socket */
186 ev->bufsize *= 2;
187 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
188 goto abort;
189
190 /* Request full dump since some info got dropped */
191 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
192 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
193 break;
194
195 default:
196 goto abort;
197 }
198 u->error = false;
199 return;
200
201 abort:
202 uloop_fd_delete(&ev->uloop);
203 return;
204 }
205
206 static struct nl_sock *
207 create_socket(int protocol, int groups)
208 {
209 struct nl_sock *sock;
210
211 sock = nl_socket_alloc();
212 if (!sock)
213 return NULL;
214
215 if (groups)
216 nl_join_groups(sock, groups);
217
218 if (nl_connect(sock, protocol)) {
219 nl_socket_free(sock);
220 return NULL;
221 }
222
223 return sock;
224 }
225
226 static bool
227 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
228 uloop_fd_handler cb, int flags)
229 {
230 ev->sock = create_socket(protocol, groups);
231 if (!ev->sock)
232 return false;
233
234 ev->uloop.fd = nl_socket_get_fd(ev->sock);
235 ev->uloop.cb = cb;
236 if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
237 return false;
238
239 return true;
240 }
241
242 static bool
243 create_event_socket(struct event_socket *ev, int protocol,
244 int (*cb)(struct nl_msg *msg, void *arg))
245 {
246 if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
247 return false;
248
249 /* Install the valid custom callback handler */
250 nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
251
252 /* Disable sequence number checking on event sockets */
253 nl_socket_disable_seq_check(ev->sock);
254
255 /* Increase rx buffer size to 65K on event sockets */
256 ev->bufsize = 65535;
257 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
258 return false;
259
260 return true;
261 }
262
263 static bool
264 create_hotplug_event_socket(struct event_socket *ev, int protocol,
265 void (*cb)(struct uloop_fd *u, unsigned int events))
266 {
267 if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
268 return false;
269
270 /* Increase rx buffer size to 65K on event sockets */
271 ev->bufsize = 65535;
272 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
273 return false;
274
275 return true;
276 }
277
278 static bool
279 system_rtn_aton(const char *src, unsigned int *dst)
280 {
281 char *e;
282 unsigned int n;
283
284 if (!strcmp(src, "local"))
285 n = RTN_LOCAL;
286 else if (!strcmp(src, "nat"))
287 n = RTN_NAT;
288 else if (!strcmp(src, "broadcast"))
289 n = RTN_BROADCAST;
290 else if (!strcmp(src, "anycast"))
291 n = RTN_ANYCAST;
292 else if (!strcmp(src, "multicast"))
293 n = RTN_MULTICAST;
294 else if (!strcmp(src, "prohibit"))
295 n = RTN_PROHIBIT;
296 else if (!strcmp(src, "unreachable"))
297 n = RTN_UNREACHABLE;
298 else if (!strcmp(src, "blackhole"))
299 n = RTN_BLACKHOLE;
300 else if (!strcmp(src, "xresolve"))
301 n = RTN_XRESOLVE;
302 else if (!strcmp(src, "unicast"))
303 n = RTN_UNICAST;
304 else if (!strcmp(src, "throw"))
305 n = RTN_THROW;
306 else if (!strcmp(src, "failed_policy"))
307 n = RTN_FAILED_POLICY;
308 else {
309 n = strtoul(src, &e, 0);
310 if (!e || *e || e == src || n > 255)
311 return false;
312 }
313
314 *dst = n;
315 return true;
316 }
317
318 static bool
319 system_tos_aton(const char *src, unsigned *dst)
320 {
321 char *e;
322
323 *dst = strtoul(src, &e, 16);
324 if (e == src || *e || *dst > 255)
325 return false;
326
327 return true;
328 }
329
330 int system_init(void)
331 {
332 static struct event_socket rtnl_event;
333 static struct event_socket hotplug_event;
334
335 sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
336 system_fd_set_cloexec(sock_ioctl);
337
338 /* Prepare socket for routing / address control */
339 sock_rtnl = create_socket(NETLINK_ROUTE, 0);
340 if (!sock_rtnl)
341 return -1;
342
343 if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
344 return -1;
345
346 if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
347 handle_hotplug_event))
348 return -1;
349
350 /* Receive network link events form kernel */
351 nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
352
353 return 0;
354 }
355
356 static void write_file(const char *path, const char *val)
357 {
358 int fd;
359
360 fd = open(path, O_WRONLY);
361 if (fd < 0)
362 return;
363
364 if (write(fd, val, strlen(val))) {}
365 close(fd);
366 }
367
368 static int read_file(const char *path, char *buf, const size_t buf_sz)
369 {
370 int fd = -1, ret = -1;
371
372 fd = open(path, O_RDONLY);
373 if (fd < 0)
374 goto out;
375
376 ssize_t len = read(fd, buf, buf_sz - 1);
377 if (len < 0)
378 goto out;
379
380 ret = buf[len] = 0;
381
382 out:
383 if (fd >= 0)
384 close(fd);
385
386 return ret;
387 }
388
389
390 static const char *
391 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
392 {
393 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
394
395 return dev_buf;
396 }
397
398 static const char *
399 dev_sysfs_path(const char *ifname, const char *file)
400 {
401 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
402
403 return dev_buf;
404 }
405
406 static void
407 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
408 const char *val)
409 {
410 write_file(dev_sysctl_path(prefix, ifname, file), val);
411 }
412
413 static int
414 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
415 char *buf, size_t buf_sz)
416 {
417 return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
418 }
419
420 static void
421 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
422 {
423 if (!val)
424 return;
425
426 write_file(dev_sysfs_path(ifname, file), val);
427 }
428
429 static void
430 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
431 {
432 char buf[16];
433
434 snprintf(buf, sizeof(buf), "%d", val);
435 system_set_dev_sysfs(file, ifname, buf);
436 }
437
438 static int
439 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
440 {
441 return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
442 }
443
444 static void system_set_disable_ipv6(struct device *dev, const char *val)
445 {
446 system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
447 }
448
449 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
450 {
451 system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
452 }
453
454 static void system_set_rpfilter(struct device *dev, const char *val)
455 {
456 system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
457 }
458
459 static void system_set_acceptlocal(struct device *dev, const char *val)
460 {
461 system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
462 }
463
464 static void system_set_igmpversion(struct device *dev, const char *val)
465 {
466 system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
467 }
468
469 static void system_set_mldversion(struct device *dev, const char *val)
470 {
471 system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
472 }
473
474 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
475 {
476 system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
477 }
478
479 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
480 {
481 system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
482 }
483
484 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
485 {
486 system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
487 }
488
489 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
490 {
491 system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
492 }
493
494 static void system_set_neigh4locktime(struct device *dev, const char *val)
495 {
496 system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
497 }
498
499 static void system_set_dadtransmits(struct device *dev, const char *val)
500 {
501 system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
502 }
503
504 static void system_set_sendredirects(struct device *dev, const char *val)
505 {
506 system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
507 }
508
509 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
510 {
511 system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
512 }
513
514 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
515 {
516 system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
517 }
518
519 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
520 {
521 system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
522 }
523
524 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
525 {
526 system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
527 }
528
529 static void system_set_arp_accept(struct device *dev, const char *val)
530 {
531 system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
532 }
533
534 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
535 {
536 system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
537 }
538
539 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
540 {
541 system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
542 }
543
544 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
545 {
546 system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
547 }
548
549 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
550 {
551 system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
552 }
553
554 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
555 {
556 system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
557 }
558
559 static void system_bridge_set_isolated(struct device *dev, const char *val)
560 {
561 system_set_dev_sysfs("brport/isolated", dev->ifname, val);
562 }
563
564 static void system_bridge_set_multicast_router(struct device *dev, const char *val)
565 {
566 system_set_dev_sysfs("brport/multicast_router", dev->ifname, val);
567 }
568
569 void system_bridge_set_stp_state(struct device *dev, bool val)
570 {
571 const char *valstr = val ? "1" : "0";
572
573 system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
574 }
575
576 static void system_bridge_set_learning(struct device *dev, const char *val)
577 {
578 system_set_dev_sysfs("brport/learning", dev->ifname, val);
579 }
580
581 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
582 {
583 system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
584 }
585
586 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
587 {
588 return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
589 dev->ifname, buf, buf_sz);
590 }
591
592 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
593 {
594 return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
595 dev->ifname, buf, buf_sz);
596 }
597
598 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
599 {
600 return system_get_dev_sysctl("ipv4/conf", "rp_filter",
601 dev->ifname, buf, buf_sz);
602 }
603
604 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
605 {
606 return system_get_dev_sysctl("ipv4/conf", "accept_local",
607 dev->ifname, buf, buf_sz);
608 }
609
610 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
611 {
612 return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
613 dev->ifname, buf, buf_sz);
614 }
615
616 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
617 {
618 return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
619 dev->ifname, buf, buf_sz);
620 }
621
622 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
623 {
624 return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
625 dev->ifname, buf, buf_sz);
626 }
627
628 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
629 {
630 return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
631 dev->ifname, buf, buf_sz);
632 }
633
634 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
635 {
636 return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
637 dev->ifname, buf, buf_sz);
638 }
639
640 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
641 {
642 return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
643 dev->ifname, buf, buf_sz);
644 }
645
646 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
647 {
648 return system_get_dev_sysctl("ipv4/neigh", "locktime",
649 dev->ifname, buf, buf_sz);
650 }
651
652 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
653 {
654 return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
655 dev->ifname, buf, buf_sz);
656 }
657
658 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
659 {
660 return system_get_dev_sysctl("ipv4/conf", "send_redirects",
661 dev->ifname, buf, buf_sz);
662 }
663
664
665 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
666 {
667 return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
668 dev->ifname, buf, buf_sz);
669 }
670
671 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
672 {
673 return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
674 dev->ifname, buf, buf_sz);
675 }
676
677 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
678 {
679 return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
680 dev->ifname, buf, buf_sz);
681 }
682
683 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
684 {
685 return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
686 dev->ifname, buf, buf_sz);
687 }
688
689 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
690 {
691 return system_get_dev_sysctl("ipv4/conf", "arp_accept",
692 dev->ifname, buf, buf_sz);
693 }
694
695 #ifndef IFF_LOWER_UP
696 #define IFF_LOWER_UP 0x10000
697 #endif
698
699 static void
700 system_device_update_state(struct device *dev, unsigned int flags, unsigned int ifindex)
701 {
702 if (dev->type == &simple_device_type) {
703 bool present = ifindex > 0;
704
705 if (dev->external)
706 present = present && (flags & IFF_UP);
707
708 device_set_present(dev, present);
709 }
710 device_set_link(dev, flags & IFF_LOWER_UP ? true : false);
711 }
712
713 /* Evaluate netlink messages */
714 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
715 {
716 struct nlmsghdr *nh = nlmsg_hdr(msg);
717 struct ifinfomsg *ifi = NLMSG_DATA(nh);
718 struct nlattr *nla[__IFLA_MAX];
719 struct device *dev;
720
721 if (nh->nlmsg_type != RTM_NEWLINK)
722 return 0;
723
724 nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
725 if (!nla[IFLA_IFNAME])
726 return 0;
727
728 dev = device_find(nla_data(nla[IFLA_IFNAME]));
729 if (!dev)
730 return 0;
731
732 system_device_update_state(dev, ifi->ifi_flags, ifi->ifi_index);
733 return 0;
734 }
735
736 static void
737 handle_hotplug_msg(char *data, int size)
738 {
739 const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
740 char *cur, *end, *sep;
741 int skip;
742 bool add;
743
744 if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
745 add = true;
746 else if (!strncmp(data, "remove@", 7))
747 add = false;
748 else
749 return;
750
751 skip = strlen(data) + 1;
752 end = data + size;
753
754 for (cur = data + skip; cur < end; cur += skip) {
755 skip = strlen(cur) + 1;
756
757 sep = strchr(cur, '=');
758 if (!sep)
759 continue;
760
761 *sep = 0;
762 if (!strcmp(cur, "INTERFACE"))
763 interface = sep + 1;
764 else if (!strcmp(cur, "SUBSYSTEM")) {
765 subsystem = sep + 1;
766 if (strcmp(subsystem, "net") != 0)
767 return;
768 } else if (!strcmp(cur, "DEVPATH_OLD")) {
769 interface_old = strrchr(sep + 1, '/');
770 if (interface_old)
771 interface_old++;
772 }
773 }
774
775 if (!subsystem || !interface)
776 return;
777
778 if (interface_old)
779 device_hotplug_event(interface_old, false);
780
781 device_hotplug_event(interface, add);
782 }
783
784 static void
785 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
786 {
787 struct event_socket *ev = container_of(u, struct event_socket, uloop);
788 struct sockaddr_nl nla;
789 unsigned char *buf = NULL;
790 int size;
791 int err;
792 socklen_t errlen = sizeof(err);
793
794 if (!u->error) {
795 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
796 if (nla.nl_pid == 0)
797 handle_hotplug_msg((char *) buf, size);
798
799 free(buf);
800 }
801 return;
802 }
803
804 if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
805 goto abort;
806
807 switch(err) {
808 case ENOBUFS:
809 /* Increase rx buffer size on netlink socket */
810 ev->bufsize *= 2;
811 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
812 goto abort;
813 break;
814
815 default:
816 goto abort;
817 }
818 u->error = false;
819 return;
820
821 abort:
822 uloop_fd_delete(&ev->uloop);
823 return;
824 }
825
826 static int system_rtnl_call(struct nl_msg *msg)
827 {
828 int ret;
829
830 ret = nl_send_auto_complete(sock_rtnl, msg);
831 nlmsg_free(msg);
832
833 if (ret < 0)
834 return ret;
835
836 return nl_wait_for_ack(sock_rtnl);
837 }
838
839 static struct nl_msg *__system_ifinfo_msg(int af, int index, const char *ifname, uint16_t type, uint16_t flags)
840 {
841 struct nl_msg *msg;
842 struct ifinfomsg iim = {
843 .ifi_family = af,
844 .ifi_index = index,
845 };
846
847 msg = nlmsg_alloc_simple(type, flags | NLM_F_REQUEST);
848 if (!msg)
849 return NULL;
850
851 nlmsg_append(msg, &iim, sizeof(iim), 0);
852 if (ifname)
853 nla_put_string(msg, IFLA_IFNAME, ifname);
854
855 return msg;
856 }
857
858 static struct nl_msg *system_ifinfo_msg(const char *ifname, uint16_t type, uint16_t flags)
859 {
860 return __system_ifinfo_msg(AF_UNSPEC, 0, ifname, type, flags);
861 }
862
863 static int system_link_del(const char *ifname)
864 {
865 struct nl_msg *msg;
866
867 msg = system_ifinfo_msg(ifname, RTM_DELLINK, 0);
868 if (!msg)
869 return -1;
870
871 return system_rtnl_call(msg);
872 }
873
874 int system_bridge_delbr(struct device *bridge)
875 {
876 return system_link_del(bridge->ifname);
877 }
878
879 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
880 {
881 struct ifreq ifr;
882
883 memset(&ifr, 0, sizeof(ifr));
884 if (dev)
885 ifr.ifr_ifindex = dev->ifindex;
886 else
887 ifr.ifr_data = data;
888 strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
889 return ioctl(sock_ioctl, cmd, &ifr);
890 }
891
892 static bool system_is_bridge(const char *name)
893 {
894 struct stat st;
895
896 return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
897 }
898
899 static char *system_get_bridge(const char *name, char *buf, int buflen)
900 {
901 char *path;
902 ssize_t len = -1;
903 glob_t gl;
904
905 snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
906 if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
907 return NULL;
908
909 if (gl.gl_pathc > 0)
910 len = readlink(gl.gl_pathv[0], buf, buflen);
911
912 globfree(&gl);
913
914 if (len < 0)
915 return NULL;
916
917 buf[len] = 0;
918 path = strrchr(buf, '/');
919 if (!path)
920 return NULL;
921
922 return path + 1;
923 }
924
925 static void
926 system_bridge_set_wireless(struct device *bridge, struct device *dev)
927 {
928 bool mcast_to_ucast = dev->wireless_ap;
929 bool hairpin;
930
931 if (dev->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST)
932 mcast_to_ucast = dev->settings.multicast_to_unicast;
933 else if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
934 !bridge->settings.multicast_to_unicast)
935 mcast_to_ucast = false;
936
937 hairpin = mcast_to_ucast || dev->wireless_proxyarp;
938 if (dev->wireless_isolate)
939 hairpin = false;
940
941 system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "0");
942 system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "0");
943 system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "0");
944 }
945
946 int system_bridge_addif(struct device *bridge, struct device *dev)
947 {
948 char buf[64];
949 char *oldbr;
950 int tries = 0;
951 int ret;
952
953 retry:
954 ret = 0;
955 oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
956 if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
957 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
958 tries++;
959 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
960 dev->ifname, bridge->ifname, tries, strerror(errno));
961 if (tries <= 3)
962 goto retry;
963 }
964
965 if (dev->wireless)
966 system_bridge_set_wireless(bridge, dev);
967
968 if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
969 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
970 system_bridge_set_multicast_router(dev, buf);
971 }
972
973 if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
974 dev->settings.multicast_fast_leave)
975 system_bridge_set_multicast_fast_leave(dev, "1");
976
977 if (dev->settings.flags & DEV_OPT_LEARNING &&
978 !dev->settings.learning)
979 system_bridge_set_learning(dev, "0");
980
981 if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
982 !dev->settings.unicast_flood)
983 system_bridge_set_unicast_flood(dev, "0");
984
985 if (dev->settings.flags & DEV_OPT_ISOLATE &&
986 dev->settings.isolate)
987 system_bridge_set_isolated(dev, "1");
988
989 if (dev->bpdu_filter)
990 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "0");
991
992 return ret;
993 }
994
995 int system_bridge_delif(struct device *bridge, struct device *dev)
996 {
997 return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
998 }
999
1000 int system_bridge_vlan(const char *iface, uint16_t vid, int16_t vid_end, bool add, unsigned int vflags)
1001 {
1002 struct bridge_vlan_info vinfo = { .vid = vid, };
1003 unsigned short flags = 0;
1004 struct nlattr *afspec;
1005 struct nl_msg *nlm;
1006 int index;
1007 int ret = 0;
1008
1009 index = if_nametoindex(iface);
1010 if (!index)
1011 return -1;
1012
1013 nlm = __system_ifinfo_msg(PF_BRIDGE, index, NULL, add ? RTM_SETLINK : RTM_DELLINK, 0);
1014 if (!nlm)
1015 return -1;
1016
1017 if (vflags & BRVLAN_F_SELF)
1018 flags |= BRIDGE_FLAGS_SELF;
1019
1020 if (vflags & BRVLAN_F_PVID)
1021 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
1022
1023 if (vflags & BRVLAN_F_UNTAGGED)
1024 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1025
1026 afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
1027 if (!afspec) {
1028 ret = -ENOMEM;
1029 goto failure;
1030 }
1031
1032 if (flags)
1033 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
1034
1035 if (vid_end > vid)
1036 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1037
1038 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1039
1040 if (vid_end > vid) {
1041 vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
1042 vinfo.flags |= BRIDGE_VLAN_INFO_RANGE_END;
1043 vinfo.vid = vid_end;
1044 nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
1045 }
1046
1047 nla_nest_end(nlm, afspec);
1048
1049 return system_rtnl_call(nlm);
1050
1051 failure:
1052 nlmsg_free(nlm);
1053 return ret;
1054 }
1055
1056 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1057 {
1058 const char *ifname = dev->ifname;
1059 struct blob_attr *cur;
1060 char op = cfg ? '+' : '-';
1061 char buf[64];
1062 size_t rem;
1063
1064 snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1065 snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1066 write_file(dev_buf, buf);
1067
1068 if (!cfg)
1069 return 0;
1070
1071 system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1072
1073 system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1074
1075 if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1076 cfg->policy == BONDING_MODE_BALANCE_TLB ||
1077 cfg->policy == BONDING_MODE_8023AD)
1078 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1079
1080 if (cfg->policy == BONDING_MODE_8023AD) {
1081 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1082 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1083 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1084 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1085 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1086 }
1087
1088 if (cfg->policy == BONDING_MODE_BALANCE_RR)
1089 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1090
1091 if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1092 cfg->policy == BONDING_MODE_BALANCE_ALB)
1093 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1094
1095 if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1096 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1097 system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1098 system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1099 system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1100 system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1101
1102 system_set_dev_sysfs_int((cfg->monitor_arp ?
1103 "bonding/arp_interval" :
1104 "bonding/miimon"), ifname, cfg->monitor_interval);
1105
1106 blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1107 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1108 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1109 }
1110
1111 system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1112 if (cfg->policy < BONDING_MODE_8023AD)
1113 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1114 system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1115 if (!cfg->monitor_arp && cfg->monitor_interval) {
1116 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1117 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1118 }
1119
1120 return 0;
1121 }
1122
1123 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1124 {
1125 const char *port_name = port->ifname;
1126 const char op_ch = add ? '+' : '-';
1127 char buf[IFNAMSIZ + 1];
1128
1129 snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1130 system_if_down(port);
1131 system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1132 system_if_up(port);
1133
1134 if (primary)
1135 system_set_dev_sysfs("bonding/primary", dev->ifname,
1136 add ? port_name : "");
1137
1138 return 0;
1139 }
1140
1141 int system_if_resolve(struct device *dev)
1142 {
1143 struct ifreq ifr;
1144
1145 memset(&ifr, 0, sizeof(ifr));
1146 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1147 if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1148 return ifr.ifr_ifindex;
1149 else
1150 return 0;
1151 }
1152
1153 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1154 {
1155 struct ifreq ifr;
1156
1157 memset(&ifr, 0, sizeof(ifr));
1158 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1159 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1160 return -1;
1161
1162 ifr.ifr_flags |= add;
1163 ifr.ifr_flags &= ~rem;
1164 return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1165 }
1166
1167 struct clear_data {
1168 struct nl_msg *msg;
1169 struct device *dev;
1170 int type;
1171 int size;
1172 int af;
1173 };
1174
1175
1176 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1177 {
1178 struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1179
1180 return (long)ifa->ifa_index == ifindex;
1181 }
1182
1183 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1184 {
1185 struct rtmsg *r = NLMSG_DATA(hdr);
1186 struct nlattr *tb[__RTA_MAX];
1187
1188 if (r->rtm_protocol == RTPROT_KERNEL &&
1189 r->rtm_family == AF_INET6)
1190 return false;
1191
1192 nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1193 if (!tb[RTA_OIF])
1194 return false;
1195
1196 return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1197 }
1198
1199 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1200 {
1201 return true;
1202 }
1203
1204 static int cb_clear_event(struct nl_msg *msg, void *arg)
1205 {
1206 struct clear_data *clr = arg;
1207 struct nlmsghdr *hdr = nlmsg_hdr(msg);
1208 bool (*cb)(struct nlmsghdr *, int ifindex);
1209 int type, ret;
1210
1211 switch(clr->type) {
1212 case RTM_GETADDR:
1213 type = RTM_DELADDR;
1214 if (hdr->nlmsg_type != RTM_NEWADDR)
1215 return NL_SKIP;
1216
1217 cb = check_ifaddr;
1218 break;
1219 case RTM_GETROUTE:
1220 type = RTM_DELROUTE;
1221 if (hdr->nlmsg_type != RTM_NEWROUTE)
1222 return NL_SKIP;
1223
1224 cb = check_route;
1225 break;
1226 case RTM_GETRULE:
1227 type = RTM_DELRULE;
1228 if (hdr->nlmsg_type != RTM_NEWRULE)
1229 return NL_SKIP;
1230
1231 cb = check_rule;
1232 break;
1233 default:
1234 return NL_SKIP;
1235 }
1236
1237 if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1238 return NL_SKIP;
1239
1240 if (type == RTM_DELRULE)
1241 D(SYSTEM, "Remove a rule\n");
1242 else
1243 D(SYSTEM, "Remove %s from device %s\n",
1244 type == RTM_DELADDR ? "an address" : "a route",
1245 clr->dev->ifname);
1246
1247 memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1248 hdr = nlmsg_hdr(clr->msg);
1249 hdr->nlmsg_type = type;
1250 hdr->nlmsg_flags = NLM_F_REQUEST;
1251
1252 nl_socket_disable_auto_ack(sock_rtnl);
1253 ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1254 if (ret < 0) {
1255 if (type == RTM_DELRULE)
1256 D(SYSTEM, "Error deleting a rule: %d\n", ret);
1257 else
1258 D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1259 type == RTM_DELADDR ? "an address" : "a route",
1260 clr->dev->ifname, ret);
1261 }
1262
1263 nl_socket_enable_auto_ack(sock_rtnl);
1264
1265 return NL_SKIP;
1266 }
1267
1268 static int
1269 cb_finish_event(struct nl_msg *msg, void *arg)
1270 {
1271 int *pending = arg;
1272 *pending = 0;
1273 return NL_STOP;
1274 }
1275
1276 static int
1277 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1278 {
1279 int *pending = arg;
1280 *pending = err->error;
1281 return NL_STOP;
1282 }
1283
1284 static void
1285 system_if_clear_entries(struct device *dev, int type, int af)
1286 {
1287 struct clear_data clr;
1288 struct nl_cb *cb;
1289 struct rtmsg rtm = {
1290 .rtm_family = af,
1291 .rtm_flags = RTM_F_CLONED,
1292 };
1293 int flags = NLM_F_DUMP;
1294 int pending = 1;
1295
1296 clr.af = af;
1297 clr.dev = dev;
1298 clr.type = type;
1299 switch (type) {
1300 case RTM_GETADDR:
1301 case RTM_GETRULE:
1302 clr.size = sizeof(struct rtgenmsg);
1303 break;
1304 case RTM_GETROUTE:
1305 clr.size = sizeof(struct rtmsg);
1306 break;
1307 default:
1308 return;
1309 }
1310
1311 cb = nl_cb_alloc(NL_CB_DEFAULT);
1312 if (!cb)
1313 return;
1314
1315 clr.msg = nlmsg_alloc_simple(type, flags);
1316 if (!clr.msg)
1317 goto out;
1318
1319 nlmsg_append(clr.msg, &rtm, clr.size, 0);
1320 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1321 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1322 nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1323
1324 if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1325 goto free;
1326
1327 while (pending > 0)
1328 nl_recvmsgs(sock_rtnl, cb);
1329
1330 free:
1331 nlmsg_free(clr.msg);
1332 out:
1333 nl_cb_put(cb);
1334 }
1335
1336 /*
1337 * Clear bridge (membership) state and bring down device
1338 */
1339 void system_if_clear_state(struct device *dev)
1340 {
1341 static char buf[256];
1342 char *bridge;
1343 device_set_ifindex(dev, system_if_resolve(dev));
1344
1345 if (dev->external || !dev->ifindex)
1346 return;
1347
1348 system_if_flags(dev->ifname, 0, IFF_UP);
1349
1350 if (system_is_bridge(dev->ifname)) {
1351 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1352 system_bridge_delbr(dev);
1353 return;
1354 }
1355
1356 bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1357 if (bridge) {
1358 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1359 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1360 }
1361
1362 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1363 system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1364 system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1365 system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1366 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1367 system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1368 system_set_disable_ipv6(dev, "0");
1369 }
1370
1371 static inline unsigned long
1372 sec_to_jiffies(int val)
1373 {
1374 return (unsigned long) val * 100;
1375 }
1376
1377 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1378 {
1379 struct nlattr *linkinfo, *data;
1380 struct nl_msg *msg;
1381 uint64_t val;
1382 int rv;
1383
1384 msg = system_ifinfo_msg(bridge->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1385 if (!msg)
1386 return -1;
1387
1388 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1389 goto nla_put_failure;
1390
1391 nla_put_string(msg, IFLA_INFO_KIND, "bridge");
1392
1393 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1394 goto nla_put_failure;
1395
1396 nla_put_u32(msg, IFLA_BR_STP_STATE, cfg->stp);
1397 nla_put_u32(msg, IFLA_BR_FORWARD_DELAY, sec_to_jiffies(cfg->forward_delay));
1398 nla_put_u8(msg, IFLA_BR_MCAST_SNOOPING, !!cfg->igmp_snoop);
1399 nla_put_u8(msg, IFLA_BR_MCAST_QUERIER, !!cfg->multicast_querier);
1400 nla_put_u32(msg, IFLA_BR_MCAST_HASH_MAX, cfg->hash_max);
1401
1402 if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER)
1403 nla_put_u8(msg, IFLA_BR_MCAST_ROUTER, !!bridge->settings.multicast_router);
1404
1405 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1406 nla_put_u32(msg, IFLA_BR_MCAST_STARTUP_QUERY_CNT, cfg->robustness);
1407 nla_put_u32(msg, IFLA_BR_MCAST_LAST_MEMBER_CNT, cfg->robustness);
1408 }
1409
1410 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL)
1411 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_INTVL, cfg->query_interval);
1412
1413 if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL)
1414 nla_put_u64(msg, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, cfg->query_response_interval);
1415
1416 if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL)
1417 nla_put_u64(msg, IFLA_BR_MCAST_LAST_MEMBER_INTVL, cfg->last_member_interval);
1418
1419 if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1420 cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1421 cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1422 val = cfg->robustness * cfg->query_interval +
1423 cfg->query_response_interval;
1424
1425 nla_put_u64(msg, IFLA_BR_MCAST_MEMBERSHIP_INTVL, val);
1426
1427 val -= cfg->query_response_interval / 2;
1428
1429 nla_put_u64(msg, IFLA_BR_MCAST_QUERIER_INTVL, val);
1430 }
1431
1432 if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1433 val = cfg->query_interval / 4;
1434
1435 nla_put_u64(msg, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, val);
1436 }
1437
1438 nla_put_u8(msg, IFLA_BR_VLAN_FILTERING, !!cfg->vlan_filtering);
1439 nla_put_u16(msg, IFLA_BR_PRIORITY, cfg->priority);
1440 nla_put_u32(msg, IFLA_BR_HELLO_TIME, sec_to_jiffies(cfg->hello_time));
1441 nla_put_u32(msg, IFLA_BR_MAX_AGE, sec_to_jiffies(cfg->max_age));
1442
1443 if (cfg->flags & BRIDGE_OPT_AGEING_TIME)
1444 nla_put_u32(msg, IFLA_BR_AGEING_TIME, sec_to_jiffies(cfg->ageing_time));
1445
1446 nla_nest_end(msg, data);
1447 nla_nest_end(msg, linkinfo);
1448
1449 rv = system_rtnl_call(msg);
1450 if (rv)
1451 D(SYSTEM, "Error adding bridge '%s': %d\n", bridge->ifname, rv);
1452
1453 return rv;
1454
1455 nla_put_failure:
1456 nlmsg_free(msg);
1457 return -ENOMEM;
1458 }
1459
1460 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1461 {
1462 struct nl_msg *msg;
1463 struct nlattr *linkinfo, *data;
1464 size_t i;
1465 int rv;
1466 static const struct {
1467 const char *name;
1468 enum macvlan_mode val;
1469 } modes[] = {
1470 { "private", MACVLAN_MODE_PRIVATE },
1471 { "vepa", MACVLAN_MODE_VEPA },
1472 { "bridge", MACVLAN_MODE_BRIDGE },
1473 { "passthru", MACVLAN_MODE_PASSTHRU },
1474 };
1475
1476 msg = system_ifinfo_msg(macvlan->ifname, RTM_NEWLINK, NLM_F_CREATE | NLM_F_EXCL);
1477 if (!msg)
1478 return -1;
1479
1480 if (cfg->flags & MACVLAN_OPT_MACADDR)
1481 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1482 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1483
1484 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1485 goto nla_put_failure;
1486
1487 nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1488
1489 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1490 goto nla_put_failure;
1491
1492 if (cfg->mode) {
1493 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1494 if (strcmp(cfg->mode, modes[i].name) != 0)
1495 continue;
1496
1497 nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1498 break;
1499 }
1500 }
1501
1502 nla_nest_end(msg, data);
1503 nla_nest_end(msg, linkinfo);
1504
1505 rv = system_rtnl_call(msg);
1506 if (rv)
1507 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1508
1509 return rv;
1510
1511 nla_put_failure:
1512 nlmsg_free(msg);
1513 return -ENOMEM;
1514 }
1515
1516 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1517 {
1518 struct nl_msg *msg;
1519 int index;
1520
1521 if (!dev)
1522 return -1;
1523
1524 index = system_if_resolve(dev);
1525 msg = __system_ifinfo_msg(AF_UNSPEC, index, target_ifname, RTM_NEWLINK, 0);
1526 if (!msg)
1527 return -1;
1528
1529 nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1530 return system_rtnl_call(msg);
1531 }
1532
1533 int system_macvlan_del(struct device *macvlan)
1534 {
1535 return system_link_del(macvlan->ifname);
1536 }
1537
1538 int system_netns_open(const pid_t target_ns)
1539 {
1540 char pid_net_path[PATH_MAX];
1541
1542 snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1543
1544 return open(pid_net_path, O_RDONLY);
1545 }
1546
1547 int system_netns_set(int netns_fd)
1548 {
1549 return setns(netns_fd, CLONE_NEWNET);
1550 }
1551
1552 int system_veth_add(struct device *veth, struct veth_config *cfg)
1553 {
1554 struct nl_msg *msg;
1555 struct ifinfomsg empty_iim = {0,};
1556 struct nlattr *linkinfo, *data, *veth_info;
1557 int rv;
1558
1559 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1560
1561 if (!msg)
1562 return -1;
1563
1564 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1565
1566 if (cfg->flags & VETH_OPT_MACADDR)
1567 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1568 nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1569
1570 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1571 goto nla_put_failure;
1572
1573 nla_put_string(msg, IFLA_INFO_KIND, "veth");
1574
1575 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1576 goto nla_put_failure;
1577
1578 if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1579 goto nla_put_failure;
1580
1581 nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1582
1583 if (cfg->flags & VETH_OPT_PEER_NAME)
1584 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1585 if (cfg->flags & VETH_OPT_PEER_MACADDR)
1586 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1587
1588 nla_nest_end(msg, veth_info);
1589 nla_nest_end(msg, data);
1590 nla_nest_end(msg, linkinfo);
1591
1592 rv = system_rtnl_call(msg);
1593 if (rv) {
1594 if (cfg->flags & VETH_OPT_PEER_NAME)
1595 D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1596 else
1597 D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1598 }
1599
1600 return rv;
1601
1602 nla_put_failure:
1603 nlmsg_free(msg);
1604 return -ENOMEM;
1605 }
1606
1607 int system_veth_del(struct device *veth)
1608 {
1609 return system_link_del(veth->ifname);
1610 }
1611
1612 static int system_vlan(struct device *dev, int id)
1613 {
1614 struct vlan_ioctl_args ifr = {
1615 .cmd = SET_VLAN_NAME_TYPE_CMD,
1616 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1617 };
1618
1619 if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1620 return -1;
1621
1622 if (id < 0) {
1623 ifr.cmd = DEL_VLAN_CMD;
1624 ifr.u.VID = 0;
1625 } else {
1626 ifr.cmd = ADD_VLAN_CMD;
1627 ifr.u.VID = id;
1628 }
1629 strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1630 return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1631 }
1632
1633 int system_vlan_add(struct device *dev, int id)
1634 {
1635 return system_vlan(dev, id);
1636 }
1637
1638 int system_vlan_del(struct device *dev)
1639 {
1640 return system_vlan(dev, -1);
1641 }
1642
1643 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1644 {
1645 struct nl_msg *msg;
1646 struct nlattr *linkinfo, *data, *qos;
1647 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1648 struct vlan_qos_mapping *elem;
1649 struct ifla_vlan_qos_mapping nl_qos_map;
1650 int rv;
1651
1652 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1653
1654 if (!msg)
1655 return -1;
1656
1657 nlmsg_append(msg, &iim, sizeof(iim), 0);
1658 nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1659 nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1660
1661 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1662 goto nla_put_failure;
1663
1664 nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1665
1666 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1667 goto nla_put_failure;
1668
1669 nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1670
1671 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1672 nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1673 #else
1674 if(cfg->proto == VLAN_PROTO_8021AD)
1675 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);
1676 #endif
1677
1678 if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1679 goto nla_put_failure;
1680
1681 vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1682 nl_qos_map.from = elem->from;
1683 nl_qos_map.to = elem->to;
1684 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1685 }
1686 nla_nest_end(msg, qos);
1687
1688 if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1689 goto nla_put_failure;
1690
1691 vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1692 nl_qos_map.from = elem->from;
1693 nl_qos_map.to = elem->to;
1694 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1695 }
1696 nla_nest_end(msg, qos);
1697
1698 nla_nest_end(msg, data);
1699 nla_nest_end(msg, linkinfo);
1700
1701 rv = system_rtnl_call(msg);
1702 if (rv)
1703 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1704
1705 return rv;
1706
1707 nla_put_failure:
1708 nlmsg_free(msg);
1709 return -ENOMEM;
1710 }
1711
1712 int system_vlandev_del(struct device *vlandev)
1713 {
1714 return system_link_del(vlandev->ifname);
1715 }
1716
1717 static void ethtool_link_mode_clear_bit(__s8 nwords, int nr, __u32 *mask)
1718 {
1719 if (nr < 0)
1720 return;
1721
1722 if (nr >= (nwords * 32))
1723 return;
1724
1725 mask[nr / 32] &= ~(1U << (nr % 32));
1726 }
1727
1728 static bool ethtool_link_mode_test_bit(__s8 nwords, int nr, const __u32 *mask)
1729 {
1730 if (nr < 0)
1731 return false;
1732
1733 if (nr >= (nwords * 32))
1734 return false;
1735
1736 return !!(mask[nr / 32] & (1U << (nr % 32)));
1737 }
1738
1739 static void
1740 system_set_ethtool_pause(struct device *dev, struct device_settings *s)
1741 {
1742 struct ethtool_pauseparam pp;
1743 struct ifreq ifr = {
1744 .ifr_data = (caddr_t)&pp,
1745 };
1746
1747 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1748 memset(&pp, 0, sizeof(pp));
1749 pp.cmd = ETHTOOL_GPAUSEPARAM;
1750 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr))
1751 return;
1752
1753 if (s->flags & DEV_OPT_RXPAUSE || s->flags & DEV_OPT_TXPAUSE) {
1754 pp.autoneg = AUTONEG_DISABLE;
1755
1756 if (s->flags & DEV_OPT_PAUSE) {
1757 if (s->flags & DEV_OPT_RXPAUSE)
1758 pp.rx_pause = s->rxpause && s->pause;
1759 else
1760 pp.rx_pause = s->pause;
1761
1762 if (s->flags & DEV_OPT_TXPAUSE)
1763 pp.tx_pause = s->txpause && s->pause;
1764 else
1765 pp.tx_pause = s->pause;
1766 } else {
1767 if (s->flags & DEV_OPT_RXPAUSE)
1768 pp.rx_pause = s->rxpause;
1769
1770 if (s->flags & DEV_OPT_TXPAUSE)
1771 pp.tx_pause = s->txpause;
1772 }
1773
1774 if (s->flags & DEV_OPT_ASYM_PAUSE &&
1775 !s->asym_pause && (pp.rx_pause != pp.tx_pause))
1776 pp.rx_pause = pp.tx_pause = false;
1777 } else {
1778 pp.autoneg = AUTONEG_ENABLE;
1779 /* Pause and Asym_Pause advertising bits will be set via
1780 * ETHTOOL_SLINKSETTINGS in system_set_ethtool_settings()
1781 */
1782 }
1783
1784 pp.cmd = ETHTOOL_SPAUSEPARAM;
1785 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1786 }
1787
1788 static void
1789 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1790 {
1791 struct {
1792 struct ethtool_link_settings req;
1793 __u32 link_mode_data[3 * 127];
1794 } ecmd;
1795 struct ifreq ifr = {
1796 .ifr_data = (caddr_t)&ecmd,
1797 };
1798 size_t i;
1799 __s8 nwords;
1800 __u32 *supported, *advertising;
1801
1802 system_set_ethtool_pause(dev, s);
1803
1804 memset(&ecmd, 0, sizeof(ecmd));
1805 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
1806 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1807
1808 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
1809 ecmd.req.link_mode_masks_nwords >= 0 ||
1810 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
1811 return;
1812
1813 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
1814
1815 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
1816 ecmd.req.link_mode_masks_nwords <= 0 ||
1817 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
1818 return;
1819
1820 nwords = ecmd.req.link_mode_masks_nwords;
1821 supported = &ecmd.link_mode_data[0];
1822 advertising = &ecmd.link_mode_data[nwords];
1823 memcpy(advertising, supported, sizeof(__u32) * nwords);
1824
1825 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
1826 if (s->flags & DEV_OPT_DUPLEX) {
1827 if (s->duplex)
1828 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
1829 else
1830 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
1831 }
1832 if (!(s->flags & DEV_OPT_SPEED) ||
1833 s->speed == ethtool_modes[i].speed)
1834 continue;
1835
1836 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_full, advertising);
1837 ethtool_link_mode_clear_bit(nwords, ethtool_modes[i].bit_half, advertising);
1838 }
1839
1840 if (s->flags & DEV_OPT_PAUSE)
1841 if (!s->pause)
1842 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, advertising);
1843
1844 if (s->flags & DEV_OPT_ASYM_PAUSE)
1845 if (!s->asym_pause)
1846 ethtool_link_mode_clear_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising);
1847
1848 if (s->flags & DEV_OPT_AUTONEG) {
1849 ecmd.req.autoneg = s->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1850 if (!s->autoneg) {
1851 if (s->flags & DEV_OPT_SPEED)
1852 ecmd.req.speed = s->speed;
1853
1854 if (s->flags & DEV_OPT_DUPLEX)
1855 ecmd.req.duplex = s->duplex ? DUPLEX_FULL : DUPLEX_HALF;
1856 }
1857 }
1858
1859 ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
1860 ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1861 }
1862
1863 void
1864 system_if_get_settings(struct device *dev, struct device_settings *s)
1865 {
1866 struct ifreq ifr;
1867 char buf[10];
1868
1869 memset(&ifr, 0, sizeof(ifr));
1870 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1871
1872 if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1873 s->mtu = ifr.ifr_mtu;
1874 s->flags |= DEV_OPT_MTU;
1875 }
1876
1877 s->mtu6 = system_update_ipv6_mtu(dev, 0);
1878 if (s->mtu6 > 0)
1879 s->flags |= DEV_OPT_MTU6;
1880
1881 if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1882 s->txqueuelen = ifr.ifr_qlen;
1883 s->flags |= DEV_OPT_TXQUEUELEN;
1884 }
1885
1886 if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1887 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1888 s->flags |= DEV_OPT_MACADDR;
1889 }
1890
1891 if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1892 s->ipv6 = !strtoul(buf, NULL, 0);
1893 s->flags |= DEV_OPT_IPV6;
1894 }
1895
1896 if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1897 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1898 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1899 }
1900
1901 if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1902 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1903 s->flags |= DEV_OPT_PROMISC;
1904
1905 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1906 s->flags |= DEV_OPT_MULTICAST;
1907 }
1908
1909 if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1910 s->rpfilter = strtoul(buf, NULL, 0);
1911 s->flags |= DEV_OPT_RPFILTER;
1912 }
1913
1914 if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1915 s->acceptlocal = strtoul(buf, NULL, 0);
1916 s->flags |= DEV_OPT_ACCEPTLOCAL;
1917 }
1918
1919 if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1920 s->igmpversion = strtoul(buf, NULL, 0);
1921 s->flags |= DEV_OPT_IGMPVERSION;
1922 }
1923
1924 if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1925 s->mldversion = strtoul(buf, NULL, 0);
1926 s->flags |= DEV_OPT_MLDVERSION;
1927 }
1928
1929 if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1930 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1931 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1932 }
1933
1934 if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1935 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1936 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1937 }
1938
1939 if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1940 s->neigh4locktime = strtol(buf, NULL, 0);
1941 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1942 }
1943
1944 if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1945 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1946 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1947 }
1948
1949 if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1950 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1951 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1952 }
1953
1954 if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1955 s->dadtransmits = strtoul(buf, NULL, 0);
1956 s->flags |= DEV_OPT_DADTRANSMITS;
1957 }
1958
1959 if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1960 s->sendredirects = strtoul(buf, NULL, 0);
1961 s->flags |= DEV_OPT_SENDREDIRECTS;
1962 }
1963
1964 if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1965 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1966 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1967 }
1968
1969 if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1970 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1971 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1972 }
1973
1974 if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1975 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1976 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1977 }
1978
1979 if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1980 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1981 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1982 }
1983
1984 if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1985 s->arp_accept = strtoul(buf, NULL, 0);
1986 s->flags |= DEV_OPT_ARP_ACCEPT;
1987 }
1988 }
1989
1990 void
1991 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1992 {
1993 struct ifreq ifr;
1994 char buf[12];
1995
1996 apply_mask &= s->flags;
1997
1998 memset(&ifr, 0, sizeof(ifr));
1999 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2000 if (apply_mask & DEV_OPT_MTU) {
2001 ifr.ifr_mtu = s->mtu;
2002 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
2003 s->flags &= ~DEV_OPT_MTU;
2004 }
2005 if (apply_mask & DEV_OPT_MTU6) {
2006 system_update_ipv6_mtu(dev, s->mtu6);
2007 }
2008 if (apply_mask & DEV_OPT_TXQUEUELEN) {
2009 ifr.ifr_qlen = s->txqueuelen;
2010 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
2011 s->flags &= ~DEV_OPT_TXQUEUELEN;
2012 }
2013 if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
2014 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2015 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
2016 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
2017 s->flags &= ~DEV_OPT_MACADDR;
2018 }
2019 if (apply_mask & DEV_OPT_IPV6)
2020 system_set_disable_ipv6(dev, s->ipv6 ? "0" : "1");
2021 if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
2022 struct device dummy = {
2023 .ifname = "all",
2024 };
2025 bool ip6segmentrouting = device_check_ip6segmentrouting();
2026
2027 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "0");
2028 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "0");
2029 }
2030 if (apply_mask & DEV_OPT_PROMISC) {
2031 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
2032 !s->promisc ? IFF_PROMISC : 0) < 0)
2033 s->flags &= ~DEV_OPT_PROMISC;
2034 }
2035 if (apply_mask & DEV_OPT_RPFILTER) {
2036 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
2037 system_set_rpfilter(dev, buf);
2038 }
2039 if (apply_mask & DEV_OPT_ACCEPTLOCAL)
2040 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
2041 if (apply_mask & DEV_OPT_IGMPVERSION) {
2042 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
2043 system_set_igmpversion(dev, buf);
2044 }
2045 if (apply_mask & DEV_OPT_MLDVERSION) {
2046 snprintf(buf, sizeof(buf), "%u", s->mldversion);
2047 system_set_mldversion(dev, buf);
2048 }
2049 if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
2050 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
2051 system_set_neigh4reachabletime(dev, buf);
2052 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
2053 system_set_neigh6reachabletime(dev, buf);
2054 }
2055 if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
2056 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
2057 system_set_neigh4locktime(dev, buf);
2058 }
2059 if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
2060 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
2061 system_set_neigh4gcstaletime(dev, buf);
2062 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
2063 system_set_neigh6gcstaletime(dev, buf);
2064 }
2065 if (apply_mask & DEV_OPT_DADTRANSMITS) {
2066 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
2067 system_set_dadtransmits(dev, buf);
2068 }
2069 if (apply_mask & DEV_OPT_MULTICAST) {
2070 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
2071 !s->multicast ? IFF_MULTICAST : 0) < 0)
2072 s->flags &= ~DEV_OPT_MULTICAST;
2073 }
2074 if (apply_mask & DEV_OPT_SENDREDIRECTS)
2075 system_set_sendredirects(dev, s->sendredirects ? "1" : "0");
2076 if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
2077 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "0");
2078 if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
2079 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "0");
2080 if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
2081 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "0");
2082 if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
2083 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "0");
2084 if (apply_mask & DEV_OPT_ARP_ACCEPT)
2085 system_set_arp_accept(dev, s->arp_accept ? "1" : "0");
2086 system_set_ethtool_settings(dev, s);
2087 }
2088
2089 int system_if_up(struct device *dev)
2090 {
2091 return system_if_flags(dev->ifname, IFF_UP, 0);
2092 }
2093
2094 int system_if_down(struct device *dev)
2095 {
2096 return system_if_flags(dev->ifname, 0, IFF_UP);
2097 }
2098
2099 struct if_check_data {
2100 struct device *dev;
2101 int pending;
2102 int ret;
2103 };
2104
2105 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2106 {
2107 struct nlmsghdr *nh = nlmsg_hdr(msg);
2108 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2109 struct if_check_data *chk = (struct if_check_data *)arg;
2110
2111 if (nh->nlmsg_type != RTM_NEWLINK)
2112 return NL_SKIP;
2113
2114 system_device_update_state(chk->dev, ifi->ifi_flags, ifi->ifi_index);
2115 return NL_OK;
2116 }
2117
2118 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2119 {
2120 struct if_check_data *chk = (struct if_check_data *)arg;
2121 chk->pending = 0;
2122 return NL_STOP;
2123 }
2124
2125 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2126 {
2127 struct if_check_data *chk = (struct if_check_data *)arg;
2128
2129 if (chk->dev->type == &simple_device_type)
2130 device_set_present(chk->dev, false);
2131 device_set_link(chk->dev, false);
2132 chk->pending = err->error;
2133
2134 return NL_STOP;
2135 }
2136
2137 struct bridge_vlan_check_data {
2138 struct device *check_dev;
2139 int ifindex;
2140 int ret;
2141 bool pending;
2142 };
2143
2144 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2145 struct bridge_vlan_port *port,
2146 struct bridge_vlan_info *vinfo)
2147 {
2148 uint16_t flags = 0, diff, mask;
2149
2150 if (port->flags & BRVLAN_F_PVID)
2151 flags |= BRIDGE_VLAN_INFO_PVID;
2152 if (port->flags & BRVLAN_F_UNTAGGED)
2153 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2154
2155 diff = vinfo->flags ^ flags;
2156 mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2157 if (diff & mask) {
2158 data->ret = 1;
2159 data->pending = false;
2160 }
2161
2162 port->check = 1;
2163 }
2164
2165 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2166 struct rtattr *attr)
2167 {
2168 struct bridge_vlan_hotplug_port *port;
2169 struct bridge_vlan_info *vinfo;
2170 struct bridge_vlan *vlan;
2171 struct rtattr *cur;
2172 int rem = RTA_PAYLOAD(attr);
2173 int i;
2174
2175 for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2176 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2177 continue;
2178
2179 vinfo = RTA_DATA(cur);
2180 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2181 if (!vlan) {
2182 data->ret = 1;
2183 data->pending = false;
2184 return;
2185 }
2186
2187 for (i = 0; i < vlan->n_ports; i++)
2188 if (!vlan->ports[i].check)
2189 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2190
2191 list_for_each_entry(port, &vlan->hotplug_ports, list)
2192 if (!port->port.check)
2193 bridge_vlan_check_port(data, &port->port, vinfo);
2194 }
2195 }
2196
2197 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2198 {
2199 struct bridge_vlan_check_data *data = arg;
2200 struct nlmsghdr *nh = nlmsg_hdr(msg);
2201 struct ifinfomsg *ifi = NLMSG_DATA(nh);
2202 struct rtattr *attr;
2203 int rem;
2204
2205 if (nh->nlmsg_type != RTM_NEWLINK)
2206 return NL_SKIP;
2207
2208 if (ifi->ifi_family != AF_BRIDGE)
2209 return NL_SKIP;
2210
2211 if (ifi->ifi_index != data->ifindex)
2212 return NL_SKIP;
2213
2214 attr = IFLA_RTA(ifi);
2215 rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2216 while (RTA_OK(attr, rem)) {
2217 if (attr->rta_type == IFLA_AF_SPEC)
2218 bridge_vlan_check_attr(data, attr);
2219
2220 attr = RTA_NEXT(attr, rem);
2221 }
2222
2223 return NL_SKIP;
2224 }
2225
2226 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2227 {
2228 struct bridge_vlan_check_data *data = arg;
2229 data->pending = false;
2230 return NL_STOP;
2231 }
2232
2233 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2234 {
2235 struct bridge_vlan_check_data *data = arg;
2236 data->pending = false;
2237 return NL_STOP;
2238 }
2239
2240 int system_bridge_vlan_check(struct device *dev, char *ifname)
2241 {
2242 struct bridge_vlan_check_data data = {
2243 .check_dev = dev,
2244 .ifindex = if_nametoindex(ifname),
2245 .ret = -1,
2246 .pending = true,
2247 };
2248 static struct ifinfomsg ifi = {
2249 .ifi_family = AF_BRIDGE
2250 };
2251 static struct rtattr ext_req = {
2252 .rta_type = IFLA_EXT_MASK,
2253 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2254 };
2255 uint32_t filter = RTEXT_FILTER_BRVLAN;
2256 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2257 struct bridge_vlan *vlan;
2258 struct nl_msg *msg;
2259 int i;
2260
2261 if (!data.ifindex)
2262 return 0;
2263
2264 msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2265
2266 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2267 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2268 nlmsg_append(msg, &filter, sizeof(filter), 0))
2269 goto free;
2270
2271 vlist_for_each_element(&dev->vlans, vlan, node) {
2272 struct bridge_vlan_hotplug_port *port;
2273
2274 for (i = 0; i < vlan->n_ports; i++) {
2275 if (!strcmp(vlan->ports[i].ifname, ifname))
2276 vlan->ports[i].check = 0;
2277 else
2278 vlan->ports[i].check = -1;
2279 }
2280
2281 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2282 if (!strcmp(port->port.ifname, ifname))
2283 port->port.check = 0;
2284 else
2285 port->port.check = -1;
2286 }
2287 }
2288
2289 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2290 nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2291 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2292 nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2293
2294 if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2295 goto free;
2296
2297 data.ret = 0;
2298 while (data.pending)
2299 nl_recvmsgs(sock_rtnl, cb);
2300
2301 vlist_for_each_element(&dev->vlans, vlan, node) {
2302 struct bridge_vlan_hotplug_port *port;
2303
2304 for (i = 0; i < vlan->n_ports; i++) {
2305 if (!vlan->ports[i].check) {
2306 data.ret = 1;
2307 break;
2308 }
2309 }
2310
2311 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2312 if (!port->port.check) {
2313 data.ret = 1;
2314 break;
2315 }
2316 }
2317 }
2318
2319 free:
2320 nlmsg_free(msg);
2321 nl_cb_put(cb);
2322 return data.ret;
2323 }
2324
2325 int system_if_check(struct device *dev)
2326 {
2327 struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2328 struct nl_msg *msg;
2329 struct ifinfomsg ifi = {
2330 .ifi_family = AF_UNSPEC,
2331 .ifi_index = 0,
2332 };
2333 struct if_check_data chk = {
2334 .dev = dev,
2335 .pending = 1,
2336 };
2337 int ret = 1;
2338
2339 if (!cb)
2340 return ret;
2341
2342 msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2343 if (!msg)
2344 goto out;
2345
2346 if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2347 nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2348 goto free;
2349
2350 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2351 nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2352 nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2353
2354 ret = nl_send_auto_complete(sock_rtnl, msg);
2355 if (ret < 0)
2356 goto free;
2357
2358 while (chk.pending > 0)
2359 nl_recvmsgs(sock_rtnl, cb);
2360
2361 ret = chk.pending;
2362
2363 free:
2364 nlmsg_free(msg);
2365 out:
2366 nl_cb_put(cb);
2367 return ret;
2368 }
2369
2370 struct device *
2371 system_if_get_parent(struct device *dev)
2372 {
2373 char buf[64], *devname;
2374 int ifindex, iflink;
2375
2376 if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2377 return NULL;
2378
2379 iflink = strtoul(buf, NULL, 0);
2380 ifindex = system_if_resolve(dev);
2381 if (!iflink || iflink == ifindex)
2382 return NULL;
2383
2384 devname = if_indextoname(iflink, buf);
2385 if (!devname)
2386 return NULL;
2387
2388 return device_get(devname, true);
2389 }
2390
2391 static bool
2392 read_string_file(int dir_fd, const char *file, char *buf, int len)
2393 {
2394 bool ret = false;
2395 char *c;
2396 int fd;
2397
2398 fd = openat(dir_fd, file, O_RDONLY);
2399 if (fd < 0)
2400 return false;
2401
2402 retry:
2403 len = read(fd, buf, len - 1);
2404 if (len < 0) {
2405 if (errno == EINTR)
2406 goto retry;
2407 } else if (len > 0) {
2408 buf[len] = 0;
2409
2410 c = strchr(buf, '\n');
2411 if (c)
2412 *c = 0;
2413
2414 ret = true;
2415 }
2416
2417 close(fd);
2418
2419 return ret;
2420 }
2421
2422 static bool
2423 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2424 {
2425 char buf[64];
2426 bool ret = false;
2427
2428 ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2429 if (ret)
2430 *val = strtoull(buf, NULL, 0);
2431
2432 return ret;
2433 }
2434
2435 bool
2436 system_if_force_external(const char *ifname)
2437 {
2438 struct stat s;
2439
2440 return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2441 }
2442
2443 static const char *
2444 system_netdevtype_name(unsigned short dev_type)
2445 {
2446 size_t i;
2447
2448 for (i = 0; i < ARRAY_SIZE(netdev_types); i++) {
2449 if (netdev_types[i].id == dev_type)
2450 return netdev_types[i].name;
2451 }
2452
2453 /* the last key is used by default */
2454 i = ARRAY_SIZE(netdev_types) - 1;
2455
2456 return netdev_types[i].name;
2457 }
2458
2459 static void
2460 system_add_devtype(struct blob_buf *b, const char *ifname)
2461 {
2462 char buf[100];
2463 bool found = false;
2464
2465 if (!system_get_dev_sysfs("uevent", ifname, buf, sizeof(buf))) {
2466 const char *info = "DEVTYPE=";
2467 char *context = NULL;
2468 const char *line = strtok_r(buf, "\r\n", &context);
2469
2470 while (line != NULL) {
2471 char *index = strstr(line, info);
2472
2473 if (index != NULL) {
2474 blobmsg_add_string(b, "devtype", index + strlen(info));
2475 found = true;
2476 break;
2477 }
2478
2479 line = strtok_r(NULL, "\r\n", &context);
2480 }
2481 }
2482
2483 if (!found) {
2484 unsigned short number = 0;
2485 const char *name = NULL;
2486
2487 if (!system_get_dev_sysfs("type", ifname, buf, sizeof(buf))) {
2488 number = strtoul(buf, NULL, 0);
2489 name = system_netdevtype_name(number);
2490 blobmsg_add_string(b, "devtype", name);
2491 }
2492 }
2493 }
2494
2495 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
2496
2497 static int32_t
2498 ethtool_feature_count(const char *ifname)
2499 {
2500 struct {
2501 struct ethtool_sset_info hdr;
2502 uint32_t buf;
2503 } req = {
2504 .hdr = {
2505 .cmd = ETHTOOL_GSSET_INFO,
2506 .sset_mask = 1 << ETH_SS_FEATURES
2507 }
2508 };
2509
2510 struct ifreq ifr = {
2511 .ifr_data = (void *)&req
2512 };
2513
2514 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2515
2516 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
2517 return -1;
2518
2519 if (!req.hdr.sset_mask)
2520 return 0;
2521
2522 return req.buf;
2523 }
2524
2525 static int32_t
2526 ethtool_feature_index(const char *ifname, const char *keyname)
2527 {
2528 struct ethtool_gstrings *feature_names;
2529 struct ifreq ifr = { 0 };
2530 int32_t n_features;
2531 uint32_t i;
2532
2533 n_features = ethtool_feature_count(ifname);
2534
2535 if (n_features <= 0)
2536 return -1;
2537
2538 feature_names = calloc(1, sizeof(*feature_names) + n_features * ETH_GSTRING_LEN);
2539
2540 if (!feature_names)
2541 return -1;
2542
2543 feature_names->cmd = ETHTOOL_GSTRINGS;
2544 feature_names->string_set = ETH_SS_FEATURES;
2545 feature_names->len = n_features;
2546
2547 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2548 ifr.ifr_data = (void *)feature_names;
2549
2550 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2551 free(feature_names);
2552
2553 return -1;
2554 }
2555
2556 for (i = 0; i < feature_names->len; i++)
2557 if (!strcmp((char *)&feature_names->data[i * ETH_GSTRING_LEN], keyname))
2558 break;
2559
2560 if (i >= feature_names->len)
2561 i = -1;
2562
2563 free(feature_names);
2564
2565 return i;
2566 }
2567
2568 static bool
2569 ethtool_feature_value(const char *ifname, const char *keyname)
2570 {
2571 struct ethtool_get_features_block *feature_block;
2572 struct ethtool_gfeatures *feature_values;
2573 struct ifreq ifr = { 0 };
2574 int32_t feature_idx;
2575 bool active;
2576
2577 feature_idx = ethtool_feature_index(ifname, keyname);
2578
2579 if (feature_idx < 0)
2580 return false;
2581
2582 feature_values = calloc(1,
2583 sizeof(*feature_values) +
2584 sizeof(feature_values->features[0]) * DIV_ROUND_UP(feature_idx, 32));
2585
2586 if (!feature_values)
2587 return false;
2588
2589 feature_values->cmd = ETHTOOL_GFEATURES;
2590 feature_values->size = DIV_ROUND_UP(feature_idx, 32);
2591
2592 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
2593 ifr.ifr_data = (void *)feature_values;
2594
2595 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0) {
2596 free(feature_values);
2597
2598 return false;
2599 }
2600
2601 feature_block = &feature_values->features[feature_idx / 32];
2602 active = feature_block->active & (1U << feature_idx % 32);
2603
2604 free(feature_values);
2605
2606 return active;
2607 }
2608
2609 static void
2610 system_add_link_mode_name(struct blob_buf *b, int i, bool half)
2611 {
2612 char *buf;
2613
2614 /* allocate string buffer large enough for the mode name and a suffix
2615 * "-F" or "-H" indicating full duplex or half duplex.
2616 */
2617 buf = blobmsg_alloc_string_buffer(b, NULL, strlen(ethtool_modes[i].name) + 3);
2618 if (!buf)
2619 return;
2620
2621 strcpy(buf, ethtool_modes[i].name);
2622 if (half)
2623 strcat(buf, "-H");
2624 else
2625 strcat(buf, "-F");
2626
2627 blobmsg_add_string_buffer(b);
2628 }
2629
2630 static void
2631 system_add_link_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2632 {
2633 size_t i;
2634
2635 for (i = 0; i < ARRAY_SIZE(ethtool_modes); i++) {
2636 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_half, mask))
2637 system_add_link_mode_name(b, i, true);
2638
2639 if (ethtool_link_mode_test_bit(nwords, ethtool_modes[i].bit_full, mask))
2640 system_add_link_mode_name(b, i, false);
2641 }
2642 }
2643
2644 static void
2645 system_add_pause_modes(__s8 nwords, struct blob_buf *b, __u32 *mask)
2646 {
2647 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Pause_BIT, mask))
2648 blobmsg_add_string(b, NULL, "pause");
2649
2650 if (ethtool_link_mode_test_bit(nwords, ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
2651 blobmsg_add_string(b, NULL, "asym_pause");
2652 }
2653
2654
2655 static void
2656 system_add_ethtool_pause_an(struct blob_buf *b, __s8 nwords,
2657 __u32 *advertising, __u32 *lp_advertising)
2658 {
2659 bool an_rx = false, an_tx = false;
2660 void *d;
2661
2662 d = blobmsg_open_array(b, "negotiated");
2663
2664 /* Work out negotiated pause frame usage per
2665 * IEEE 802.3-2005 table 28B-3.
2666 */
2667 if (ethtool_link_mode_test_bit(nwords,
2668 ETHTOOL_LINK_MODE_Pause_BIT,
2669 advertising) &&
2670 ethtool_link_mode_test_bit(nwords,
2671 ETHTOOL_LINK_MODE_Pause_BIT,
2672 lp_advertising)) {
2673 an_tx = true;
2674 an_rx = true;
2675 } else if (ethtool_link_mode_test_bit(nwords,
2676 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2677 advertising) &&
2678 ethtool_link_mode_test_bit(nwords,
2679 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2680 lp_advertising)) {
2681 if (ethtool_link_mode_test_bit(nwords,
2682 ETHTOOL_LINK_MODE_Pause_BIT,
2683 advertising))
2684 an_rx = true;
2685 else if (ethtool_link_mode_test_bit(nwords,
2686 ETHTOOL_LINK_MODE_Pause_BIT,
2687 lp_advertising))
2688 an_tx = true;
2689 }
2690 if (an_tx)
2691 blobmsg_add_string(b, NULL, "rx");
2692
2693 if (an_rx)
2694 blobmsg_add_string(b, NULL, "tx");
2695
2696 blobmsg_close_array(b, d);
2697 }
2698
2699 static void
2700 system_get_ethtool_pause(struct device *dev, bool *rx_pause, bool *tx_pause, bool *pause_autoneg)
2701 {
2702 struct ethtool_pauseparam pp;
2703 struct ifreq ifr = {
2704 .ifr_data = (caddr_t)&pp,
2705 };
2706
2707 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2708 memset(&pp, 0, sizeof(pp));
2709 pp.cmd = ETHTOOL_GPAUSEPARAM;
2710
2711 /* may fail */
2712 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == -1) {
2713 *pause_autoneg = true;
2714 return;
2715 }
2716
2717 *rx_pause = pp.rx_pause;
2718 *tx_pause = pp.tx_pause;
2719 *pause_autoneg = pp.autoneg;
2720 }
2721
2722 int
2723 system_if_dump_info(struct device *dev, struct blob_buf *b)
2724 {
2725 __u32 *supported, *advertising, *lp_advertising;
2726 bool rx_pause, tx_pause, pause_autoneg;
2727 struct {
2728 struct ethtool_link_settings req;
2729 __u32 link_mode_data[3 * 127];
2730 } ecmd;
2731 struct ifreq ifr = {
2732 .ifr_data = (caddr_t)&ecmd,
2733 };
2734 __s8 nwords;
2735 void *c, *d;
2736 char *s;
2737
2738 system_get_ethtool_pause(dev, &rx_pause, &tx_pause, &pause_autoneg);
2739
2740 memset(&ecmd, 0, sizeof(ecmd));
2741 ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
2742 strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2743
2744 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2745 ecmd.req.link_mode_masks_nwords >= 0 ||
2746 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2747 return -EOPNOTSUPP;
2748
2749 ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
2750
2751 if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) < 0 ||
2752 ecmd.req.link_mode_masks_nwords <= 0 ||
2753 ecmd.req.cmd != ETHTOOL_GLINKSETTINGS)
2754 return -EIO;
2755
2756 nwords = ecmd.req.link_mode_masks_nwords;
2757 supported = &ecmd.link_mode_data[0];
2758 advertising = &ecmd.link_mode_data[nwords];
2759 lp_advertising = &ecmd.link_mode_data[2 * nwords];
2760
2761 c = blobmsg_open_array(b, "link-advertising");
2762 system_add_link_modes(nwords, b, advertising);
2763 blobmsg_close_array(b, c);
2764
2765 c = blobmsg_open_array(b, "link-partner-advertising");
2766 system_add_link_modes(nwords, b, lp_advertising);
2767 blobmsg_close_array(b, c);
2768
2769 c = blobmsg_open_array(b, "link-supported");
2770 system_add_link_modes(nwords, b, supported);
2771 blobmsg_close_array(b, c);
2772
2773 if (ethtool_validate_speed(ecmd.req.speed) &&
2774 (ecmd.req.speed != (__u32)SPEED_UNKNOWN) &&
2775 (ecmd.req.speed != 0)) {
2776 s = blobmsg_alloc_string_buffer(b, "speed", 10);
2777 snprintf(s, 8, "%d%c", ecmd.req.speed,
2778 ecmd.req.duplex == DUPLEX_HALF ? 'H' : 'F');
2779 blobmsg_add_string_buffer(b);
2780 }
2781 blobmsg_add_u8(b, "autoneg", !!ecmd.req.autoneg);
2782
2783 c = blobmsg_open_table(b, "flow-control");
2784 blobmsg_add_u8(b, "autoneg", pause_autoneg);
2785
2786 d = blobmsg_open_array(b, "supported");
2787 system_add_pause_modes(nwords, b, supported);
2788 blobmsg_close_array(b, d);
2789
2790 if (pause_autoneg) {
2791 d = blobmsg_open_array(b, "link-advertising");
2792 system_add_pause_modes(nwords, b, advertising);
2793 blobmsg_close_array(b, d);
2794 }
2795
2796 d = blobmsg_open_array(b, "link-partner-advertising");
2797 system_add_pause_modes(nwords, b, lp_advertising);
2798 blobmsg_close_array(b, d);
2799
2800 if (pause_autoneg) {
2801 system_add_ethtool_pause_an(b, nwords, advertising,
2802 lp_advertising);
2803 } else {
2804 d = blobmsg_open_array(b, "selected");
2805 if (rx_pause)
2806 blobmsg_add_string(b, NULL, "rx");
2807
2808 if (tx_pause)
2809 blobmsg_add_string(b, NULL, "tx");
2810
2811 blobmsg_close_array(b, d);
2812 }
2813
2814 blobmsg_close_table(b, c);
2815
2816 blobmsg_add_u8(b, "hw-tc-offload",
2817 ethtool_feature_value(dev->ifname, "hw-tc-offload"));
2818
2819 system_add_devtype(b, dev->ifname);
2820
2821 return 0;
2822 }
2823
2824 int
2825 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2826 {
2827 const char *const counters[] = {
2828 "collisions", "rx_frame_errors", "tx_compressed",
2829 "multicast", "rx_length_errors", "tx_dropped",
2830 "rx_bytes", "rx_missed_errors", "tx_errors",
2831 "rx_compressed", "rx_over_errors", "tx_fifo_errors",
2832 "rx_crc_errors", "rx_packets", "tx_heartbeat_errors",
2833 "rx_dropped", "tx_aborted_errors", "tx_packets",
2834 "rx_errors", "tx_bytes", "tx_window_errors",
2835 "rx_fifo_errors", "tx_carrier_errors",
2836 };
2837 int stats_dir;
2838 size_t i;
2839 uint64_t val = 0;
2840
2841 stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2842 if (stats_dir < 0)
2843 return -1;
2844
2845 for (i = 0; i < ARRAY_SIZE(counters); i++)
2846 if (read_uint64_file(stats_dir, counters[i], &val))
2847 blobmsg_add_u64(b, counters[i], val);
2848
2849 close(stats_dir);
2850 return 0;
2851 }
2852
2853 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2854 {
2855 bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2856 int alen = v4 ? 4 : 16;
2857 unsigned int flags = 0;
2858 struct ifaddrmsg ifa = {
2859 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2860 .ifa_prefixlen = addr->mask,
2861 .ifa_index = dev->ifindex,
2862 };
2863
2864 struct nl_msg *msg;
2865 if (cmd == RTM_NEWADDR)
2866 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2867
2868 msg = nlmsg_alloc_simple(cmd, flags);
2869 if (!msg)
2870 return -1;
2871
2872 nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2873 nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2874 if (v4) {
2875 if (addr->broadcast)
2876 nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2877 if (addr->point_to_point)
2878 nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2879 } else {
2880 time_t now = system_get_rtime();
2881 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2882
2883 if (addr->preferred_until) {
2884 int64_t preferred = addr->preferred_until - now;
2885 if (preferred < 0)
2886 preferred = 0;
2887 else if (preferred > UINT32_MAX)
2888 preferred = UINT32_MAX;
2889
2890 cinfo.ifa_prefered = preferred;
2891 }
2892
2893 if (addr->valid_until) {
2894 int64_t valid = addr->valid_until - now;
2895 if (valid <= 0) {
2896 nlmsg_free(msg);
2897 return -1;
2898 }
2899 else if (valid > UINT32_MAX)
2900 valid = UINT32_MAX;
2901
2902 cinfo.ifa_valid = valid;
2903 }
2904
2905 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2906
2907 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2908 nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2909 }
2910
2911 return system_rtnl_call(msg);
2912 }
2913
2914 int system_add_address(struct device *dev, struct device_addr *addr)
2915 {
2916 return system_addr(dev, addr, RTM_NEWADDR);
2917 }
2918
2919 int system_del_address(struct device *dev, struct device_addr *addr)
2920 {
2921 return system_addr(dev, addr, RTM_DELADDR);
2922 }
2923
2924 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2925 {
2926 int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2927 unsigned int flags = 0;
2928 struct ndmsg ndm = {
2929 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2930 .ndm_ifindex = dev->ifindex,
2931 .ndm_state = NUD_PERMANENT,
2932 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2933 };
2934 struct nl_msg *msg;
2935
2936 if (cmd == RTM_NEWNEIGH)
2937 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2938
2939 msg = nlmsg_alloc_simple(cmd, flags);
2940
2941 if (!msg)
2942 return -1;
2943
2944 nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2945
2946 nla_put(msg, NDA_DST, alen, &neighbor->addr);
2947 if (neighbor->flags & DEVNEIGH_MAC)
2948 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2949
2950
2951 return system_rtnl_call(msg);
2952 }
2953
2954 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2955 {
2956 return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2957 }
2958
2959 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2960 {
2961 return system_neigh(dev, neighbor, RTM_DELNEIGH);
2962 }
2963
2964 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2965 {
2966 int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2967 bool have_gw;
2968 unsigned int flags = 0;
2969
2970 if (alen == 4)
2971 have_gw = !!route->nexthop.in.s_addr;
2972 else
2973 have_gw = route->nexthop.in6.s6_addr32[0] ||
2974 route->nexthop.in6.s6_addr32[1] ||
2975 route->nexthop.in6.s6_addr32[2] ||
2976 route->nexthop.in6.s6_addr32[3];
2977
2978 unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2979 ? route->table : RT_TABLE_MAIN;
2980
2981 struct rtmsg rtm = {
2982 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2983 .rtm_dst_len = route->mask,
2984 .rtm_src_len = route->sourcemask,
2985 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2986 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2987 .rtm_scope = RT_SCOPE_NOWHERE,
2988 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2989 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2990 };
2991 struct nl_msg *msg;
2992
2993 if (cmd == RTM_NEWROUTE) {
2994 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2995
2996 if (!dev) { /* Add null-route */
2997 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2998 rtm.rtm_type = RTN_UNREACHABLE;
2999 }
3000 else
3001 rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
3002 }
3003
3004 if (route->flags & DEVROUTE_TYPE) {
3005 rtm.rtm_type = route->type;
3006 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
3007 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
3008 rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
3009 rtm.rtm_table = RT_TABLE_LOCAL;
3010 }
3011
3012 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
3013 rtm.rtm_scope = RT_SCOPE_HOST;
3014 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
3015 rtm.rtm_type == RTN_ANYCAST) {
3016 rtm.rtm_scope = RT_SCOPE_LINK;
3017 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
3018 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
3019 rtm.rtm_type == RTN_THROW) {
3020 rtm.rtm_scope = RT_SCOPE_UNIVERSE;
3021 dev = NULL;
3022 }
3023 }
3024
3025 msg = nlmsg_alloc_simple(cmd, flags);
3026 if (!msg)
3027 return -1;
3028
3029 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3030
3031 if (route->mask)
3032 nla_put(msg, RTA_DST, alen, &route->addr);
3033
3034 if (route->sourcemask) {
3035 if (rtm.rtm_family == AF_INET)
3036 nla_put(msg, RTA_PREFSRC, alen, &route->source);
3037 else
3038 nla_put(msg, RTA_SRC, alen, &route->source);
3039 }
3040
3041 if (route->metric > 0)
3042 nla_put_u32(msg, RTA_PRIORITY, route->metric);
3043
3044 if (have_gw)
3045 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
3046
3047 if (dev)
3048 nla_put_u32(msg, RTA_OIF, dev->ifindex);
3049
3050 if (table >= 256)
3051 nla_put_u32(msg, RTA_TABLE, table);
3052
3053 if (route->flags & DEVROUTE_MTU) {
3054 struct nlattr *metrics;
3055
3056 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
3057 goto nla_put_failure;
3058
3059 nla_put_u32(msg, RTAX_MTU, route->mtu);
3060
3061 nla_nest_end(msg, metrics);
3062 }
3063
3064 return system_rtnl_call(msg);
3065
3066 nla_put_failure:
3067 nlmsg_free(msg);
3068 return -ENOMEM;
3069 }
3070
3071 int system_add_route(struct device *dev, struct device_route *route)
3072 {
3073 return system_rt(dev, route, RTM_NEWROUTE);
3074 }
3075
3076 int system_del_route(struct device *dev, struct device_route *route)
3077 {
3078 return system_rt(dev, route, RTM_DELROUTE);
3079 }
3080
3081 int system_flush_routes(void)
3082 {
3083 const char *names[] = { "ipv4", "ipv6" };
3084 size_t i;
3085 int fd;
3086
3087 for (i = 0; i < ARRAY_SIZE(names); i++) {
3088 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
3089 fd = open(dev_buf, O_WRONLY);
3090 if (fd < 0)
3091 continue;
3092
3093 if (write(fd, "-1", 2)) {}
3094 close(fd);
3095 }
3096 return 0;
3097 }
3098
3099 bool system_resolve_rt_type(const char *type, unsigned int *id)
3100 {
3101 return system_rtn_aton(type, id);
3102 }
3103
3104 bool system_resolve_rt_proto(const char *type, unsigned int *id)
3105 {
3106 FILE *f;
3107 char *e, buf[128];
3108 unsigned int n, proto = 256;
3109 n = strtoul(type, &e, 0);
3110 if (!*e && e != type)
3111 proto = n;
3112 else if (!strcmp(type, "unspec"))
3113 proto = RTPROT_UNSPEC;
3114 else if (!strcmp(type, "kernel"))
3115 proto = RTPROT_KERNEL;
3116 else if (!strcmp(type, "boot"))
3117 proto = RTPROT_BOOT;
3118 else if (!strcmp(type, "static"))
3119 proto = RTPROT_STATIC;
3120 else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
3121 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
3122 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3123 continue;
3124
3125 n = strtoul(e, NULL, 10);
3126 e = strtok(NULL, " \t\n");
3127
3128 if (e && !strcmp(e, type)) {
3129 proto = n;
3130 break;
3131 }
3132 }
3133 fclose(f);
3134 }
3135
3136 if (proto > 255)
3137 return false;
3138
3139 *id = proto;
3140 return true;
3141 }
3142
3143 bool system_resolve_rt_table(const char *name, unsigned int *id)
3144 {
3145 FILE *f;
3146 char *e, buf[128];
3147 unsigned int n, table = RT_TABLE_UNSPEC;
3148
3149 /* first try to parse table as number */
3150 if ((n = strtoul(name, &e, 0)) > 0 && !*e)
3151 table = n;
3152
3153 /* handle well known aliases */
3154 else if (!strcmp(name, "default"))
3155 table = RT_TABLE_DEFAULT;
3156 else if (!strcmp(name, "main"))
3157 table = RT_TABLE_MAIN;
3158 else if (!strcmp(name, "local"))
3159 table = RT_TABLE_LOCAL;
3160
3161 /* try to look up name in /etc/iproute2/rt_tables */
3162 else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
3163 {
3164 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
3165 {
3166 if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
3167 continue;
3168
3169 n = strtoul(e, NULL, 10);
3170 e = strtok(NULL, " \t\n");
3171
3172 if (e && !strcmp(e, name))
3173 {
3174 table = n;
3175 break;
3176 }
3177 }
3178
3179 fclose(f);
3180 }
3181
3182 if (table == RT_TABLE_UNSPEC)
3183 return false;
3184
3185 *id = table;
3186 return true;
3187 }
3188
3189 bool system_is_default_rt_table(unsigned int id)
3190 {
3191 return (id == RT_TABLE_MAIN);
3192 }
3193
3194 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
3195 {
3196 char *e;
3197 unsigned int n;
3198
3199 if (!strcmp(filter, "strict"))
3200 n = 1;
3201 else if (!strcmp(filter, "loose"))
3202 n = 2;
3203 else {
3204 n = strtoul(filter, &e, 0);
3205 if (*e || e == filter || n > 2)
3206 return false;
3207 }
3208
3209 *id = n;
3210 return true;
3211 }
3212
3213 static int system_iprule(struct iprule *rule, int cmd)
3214 {
3215 int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
3216
3217 struct nl_msg *msg;
3218 struct rtmsg rtm = {
3219 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
3220 .rtm_protocol = RTPROT_STATIC,
3221 .rtm_scope = RT_SCOPE_UNIVERSE,
3222 .rtm_table = RT_TABLE_UNSPEC,
3223 .rtm_type = RTN_UNSPEC,
3224 .rtm_flags = 0,
3225 };
3226
3227 if (cmd == RTM_NEWRULE)
3228 rtm.rtm_type = RTN_UNICAST;
3229
3230 if (rule->invert)
3231 rtm.rtm_flags |= FIB_RULE_INVERT;
3232
3233 if (rule->flags & IPRULE_SRC)
3234 rtm.rtm_src_len = rule->src_mask;
3235
3236 if (rule->flags & IPRULE_DEST)
3237 rtm.rtm_dst_len = rule->dest_mask;
3238
3239 if (rule->flags & IPRULE_TOS)
3240 rtm.rtm_tos = rule->tos;
3241
3242 if (rule->flags & IPRULE_LOOKUP) {
3243 if (rule->lookup < 256)
3244 rtm.rtm_table = rule->lookup;
3245 }
3246
3247 if (rule->flags & IPRULE_ACTION)
3248 rtm.rtm_type = rule->action;
3249 else if (rule->flags & IPRULE_GOTO)
3250 rtm.rtm_type = FR_ACT_GOTO;
3251 else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
3252 rtm.rtm_type = FR_ACT_NOP;
3253
3254 msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
3255
3256 if (!msg)
3257 return -1;
3258
3259 nlmsg_append(msg, &rtm, sizeof(rtm), 0);
3260
3261 if (rule->flags & IPRULE_IN)
3262 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
3263
3264 if (rule->flags & IPRULE_OUT)
3265 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
3266
3267 if (rule->flags & IPRULE_SRC)
3268 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
3269
3270 if (rule->flags & IPRULE_DEST)
3271 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
3272
3273 if (rule->flags & IPRULE_PRIORITY)
3274 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
3275 else if (cmd == RTM_NEWRULE)
3276 nla_put_u32(msg, FRA_PRIORITY, rule->order);
3277
3278 if (rule->flags & IPRULE_FWMARK)
3279 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
3280
3281 if (rule->flags & IPRULE_FWMASK)
3282 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
3283
3284 if (rule->flags & IPRULE_LOOKUP) {
3285 if (rule->lookup >= 256)
3286 nla_put_u32(msg, FRA_TABLE, rule->lookup);
3287 }
3288
3289 if (rule->flags & IPRULE_SUP_PREFIXLEN)
3290 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
3291
3292 if (rule->flags & IPRULE_UIDRANGE) {
3293 struct fib_rule_uid_range uidrange = {
3294 .start = rule->uidrange_start,
3295 .end = rule->uidrange_end
3296 };
3297
3298 nla_put(msg, FRA_UID_RANGE, sizeof(uidrange), &uidrange);
3299 }
3300
3301 if (rule->flags & IPRULE_GOTO)
3302 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
3303
3304 return system_rtnl_call(msg);
3305 }
3306
3307 int system_add_iprule(struct iprule *rule)
3308 {
3309 return system_iprule(rule, RTM_NEWRULE);
3310 }
3311
3312 int system_del_iprule(struct iprule *rule)
3313 {
3314 return system_iprule(rule, RTM_DELRULE);
3315 }
3316
3317 int system_flush_iprules(void)
3318 {
3319 int rv = 0;
3320 struct iprule rule;
3321
3322 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
3323 system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
3324
3325 memset(&rule, 0, sizeof(rule));
3326
3327
3328 rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3329
3330 rule.priority = 0;
3331 rule.lookup = RT_TABLE_LOCAL;
3332 rv |= system_iprule(&rule, RTM_NEWRULE);
3333
3334 rule.priority = 32766;
3335 rule.lookup = RT_TABLE_MAIN;
3336 rv |= system_iprule(&rule, RTM_NEWRULE);
3337
3338 rule.priority = 32767;
3339 rule.lookup = RT_TABLE_DEFAULT;
3340 rv |= system_iprule(&rule, RTM_NEWRULE);
3341
3342
3343 rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
3344
3345 rule.priority = 0;
3346 rule.lookup = RT_TABLE_LOCAL;
3347 rv |= system_iprule(&rule, RTM_NEWRULE);
3348
3349 rule.priority = 32766;
3350 rule.lookup = RT_TABLE_MAIN;
3351 rv |= system_iprule(&rule, RTM_NEWRULE);
3352
3353 return rv;
3354 }
3355
3356 bool system_resolve_iprule_action(const char *action, unsigned int *id)
3357 {
3358 return system_rtn_aton(action, id);
3359 }
3360
3361 time_t system_get_rtime(void)
3362 {
3363 struct timespec ts;
3364 struct timeval tv;
3365
3366 if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
3367 return ts.tv_sec;
3368
3369 if (gettimeofday(&tv, NULL) == 0)
3370 return tv.tv_sec;
3371
3372 return 0;
3373 }
3374
3375 #ifndef IP_DF
3376 #define IP_DF 0x4000
3377 #endif
3378
3379 static int tunnel_ioctl(const char *name, int cmd, void *p)
3380 {
3381 struct ifreq ifr;
3382
3383 memset(&ifr, 0, sizeof(ifr));
3384 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
3385 ifr.ifr_ifru.ifru_data = p;
3386 return ioctl(sock_ioctl, cmd, &ifr);
3387 }
3388
3389 #ifdef IFLA_IPTUN_MAX
3390 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
3391 struct blob_attr **tb)
3392 {
3393 struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
3394 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3395 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
3396 struct blob_attr *cur;
3397 int ret = 0, ttl = 0;
3398
3399 if (!nlm)
3400 return -1;
3401
3402 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3403 nla_put_string(nlm, IFLA_IFNAME, name);
3404
3405 if (link)
3406 nla_put_u32(nlm, IFLA_LINK, link);
3407
3408 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3409 if (!linkinfo) {
3410 ret = -ENOMEM;
3411 goto failure;
3412 }
3413
3414 nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3415 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3416 if (!infodata) {
3417 ret = -ENOMEM;
3418 goto failure;
3419 }
3420
3421 if (link)
3422 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3423
3424 if ((cur = tb[TUNNEL_ATTR_TTL]))
3425 ttl = blobmsg_get_u32(cur);
3426
3427 nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3428 nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3429
3430 struct in6_addr in6buf;
3431 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3432 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3433 ret = -EINVAL;
3434 goto failure;
3435 }
3436 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3437 }
3438
3439 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3440 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3441 ret = -EINVAL;
3442 goto failure;
3443 }
3444 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3445 }
3446
3447 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3448 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3449 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3450
3451 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3452 blobmsg_data(cur), blobmsg_len(cur));
3453
3454 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3455 char *str = blobmsg_get_string(cur);
3456
3457 if (strcmp(str, "ignore")) {
3458 char *e;
3459 unsigned encap_limit = strtoul(str, &e, 0);
3460
3461 if (e == str || *e || encap_limit > 255) {
3462 ret = -EINVAL;
3463 goto failure;
3464 }
3465
3466 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3467 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3468 }
3469 }
3470
3471 #ifdef IFLA_IPTUN_FMR_MAX
3472 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3473 struct blob_attr *rcur;
3474 unsigned rrem, fmrcnt = 0;
3475 struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3476
3477 if (!fmrs) {
3478 ret = -ENOMEM;
3479 goto failure;
3480 }
3481
3482 blobmsg_for_each_attr(rcur, cur, rrem) {
3483 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3484 struct in6_addr ip6prefix;
3485 struct in_addr ip4prefix;
3486 unsigned ip4len, ip6len, ealen, offset;
3487
3488 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3489 blobmsg_data(rcur), blobmsg_len(rcur));
3490
3491 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3492 !parse_ip_and_netmask(AF_INET6,
3493 blobmsg_data(tb_cur), &ip6prefix,
3494 &ip6len)) {
3495 ret = -EINVAL;
3496 goto failure;
3497 }
3498
3499 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3500 !parse_ip_and_netmask(AF_INET,
3501 blobmsg_data(tb_cur), &ip4prefix,
3502 &ip4len)) {
3503 ret = -EINVAL;
3504 goto failure;
3505 }
3506
3507 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3508 ret = -EINVAL;
3509 goto failure;
3510 }
3511 ealen = blobmsg_get_u32(tb_cur);
3512
3513 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3514 ret = -EINVAL;
3515 goto failure;
3516 }
3517 offset = blobmsg_get_u32(tb_cur);
3518
3519 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3520 if (!rule) {
3521 ret = -ENOMEM;
3522 goto failure;
3523 }
3524
3525 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3526 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3527 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3528 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3529 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3530 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3531
3532 nla_nest_end(nlm, rule);
3533 }
3534
3535 nla_nest_end(nlm, fmrs);
3536 }
3537 #endif
3538 if (tun_flags)
3539 nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3540 }
3541
3542 nla_nest_end(nlm, infodata);
3543 nla_nest_end(nlm, linkinfo);
3544
3545 return system_rtnl_call(nlm);
3546
3547 failure:
3548 nlmsg_free(nlm);
3549 return ret;
3550 }
3551 #endif
3552
3553 #ifdef IFLA_IPTUN_MAX
3554 #define IP6_FLOWINFO_TCLASS htonl(0x0FF00000)
3555 static int system_add_gre_tunnel(const char *name, const char *kind,
3556 const unsigned int link, struct blob_attr **tb, bool v6)
3557 {
3558 struct nl_msg *nlm;
3559 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3560 struct blob_attr *cur;
3561 uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3562 uint16_t iflags = 0, oflags = 0;
3563 uint8_t tos = 0;
3564 int ret = 0, ttl = 0;
3565 unsigned encap_limit = 0;
3566
3567 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3568 if (!nlm)
3569 return -1;
3570
3571 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3572 nla_put_string(nlm, IFLA_IFNAME, name);
3573
3574 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3575 if (!linkinfo) {
3576 ret = -ENOMEM;
3577 goto failure;
3578 }
3579
3580 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3581 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3582 if (!infodata) {
3583 ret = -ENOMEM;
3584 goto failure;
3585 }
3586
3587 if (link)
3588 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3589
3590 if ((cur = tb[TUNNEL_ATTR_TTL]))
3591 ttl = blobmsg_get_u32(cur);
3592
3593 if ((cur = tb[TUNNEL_ATTR_TOS])) {
3594 char *str = blobmsg_get_string(cur);
3595 if (strcmp(str, "inherit")) {
3596 unsigned uval;
3597
3598 if (!system_tos_aton(str, &uval)) {
3599 ret = -EINVAL;
3600 goto failure;
3601 }
3602
3603 if (v6)
3604 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3605 else
3606 tos = uval;
3607 } else {
3608 if (v6)
3609 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3610 else
3611 tos = 1;
3612 }
3613 }
3614
3615 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3616 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3617
3618 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3619 blobmsg_data(cur), blobmsg_len(cur));
3620
3621 if ((cur = tb_data[GRE_DATA_IKEY])) {
3622 if ((ikey = blobmsg_get_u32(cur)))
3623 iflags |= GRE_KEY;
3624 }
3625
3626 if ((cur = tb_data[GRE_DATA_OKEY])) {
3627 if ((okey = blobmsg_get_u32(cur)))
3628 oflags |= GRE_KEY;
3629 }
3630
3631 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3632 if (blobmsg_get_bool(cur))
3633 iflags |= GRE_CSUM;
3634 }
3635
3636 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3637 if (blobmsg_get_bool(cur))
3638 oflags |= GRE_CSUM;
3639 }
3640
3641 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3642 if (blobmsg_get_bool(cur))
3643 iflags |= GRE_SEQ;
3644 }
3645
3646 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3647 if (blobmsg_get_bool(cur))
3648 oflags |= GRE_SEQ;
3649 }
3650
3651 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3652 char *str = blobmsg_get_string(cur);
3653
3654 if (strcmp(str, "ignore")) {
3655 char *e;
3656
3657 encap_limit = strtoul(str, &e, 0);
3658
3659 if (e == str || *e || encap_limit > 255) {
3660 ret = -EINVAL;
3661 goto failure;
3662 }
3663
3664 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3665 }
3666 }
3667 }
3668
3669 if (v6) {
3670 struct in6_addr in6buf;
3671 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3672 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3673 ret = -EINVAL;
3674 goto failure;
3675 }
3676 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3677 }
3678
3679 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3680 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3681 ret = -EINVAL;
3682 goto failure;
3683 }
3684 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3685 }
3686
3687 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3688 nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3689
3690 if (flowinfo)
3691 nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3692
3693 if (flags6)
3694 nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3695
3696 if (!ttl)
3697 ttl = 64;
3698 } else {
3699 struct in_addr inbuf;
3700 bool set_df = true;
3701
3702 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3703 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3704 ret = -EINVAL;
3705 goto failure;
3706 }
3707 nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3708 }
3709
3710 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3711 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3712 ret = -EINVAL;
3713 goto failure;
3714 }
3715 nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3716
3717 if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3718 if (!okey) {
3719 okey = inbuf.s_addr;
3720 oflags |= GRE_KEY;
3721 }
3722
3723 if (!ikey) {
3724 ikey = inbuf.s_addr;
3725 iflags |= GRE_KEY;
3726 }
3727 }
3728 }
3729
3730 if ((cur = tb[TUNNEL_ATTR_DF]))
3731 set_df = blobmsg_get_bool(cur);
3732
3733 if (!set_df) {
3734 /* ttl != 0 and nopmtudisc are incompatible */
3735 if (ttl) {
3736 ret = -EINVAL;
3737 goto failure;
3738 }
3739 } else if (!ttl)
3740 ttl = 64;
3741
3742 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3743
3744 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3745 }
3746
3747 if (ttl)
3748 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3749
3750 if (oflags)
3751 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3752
3753 if (iflags)
3754 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3755
3756 if (okey)
3757 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3758
3759 if (ikey)
3760 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3761
3762 nla_nest_end(nlm, infodata);
3763 nla_nest_end(nlm, linkinfo);
3764
3765 return system_rtnl_call(nlm);
3766
3767 failure:
3768 nlmsg_free(nlm);
3769 return ret;
3770 }
3771 #endif
3772
3773 #ifdef IFLA_VTI_MAX
3774 static int system_add_vti_tunnel(const char *name, const char *kind,
3775 const unsigned int link, struct blob_attr **tb, bool v6)
3776 {
3777 struct nl_msg *nlm;
3778 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3779 struct blob_attr *cur;
3780 int ret = 0;
3781
3782 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3783 if (!nlm)
3784 return -1;
3785
3786 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3787 nla_put_string(nlm, IFLA_IFNAME, name);
3788
3789 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3790 if (!linkinfo) {
3791 ret = -ENOMEM;
3792 goto failure;
3793 }
3794
3795 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3796 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3797 if (!infodata) {
3798 ret = -ENOMEM;
3799 goto failure;
3800 }
3801
3802 if (link)
3803 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3804
3805 if (v6) {
3806 struct in6_addr in6buf;
3807 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3808 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3809 ret = -EINVAL;
3810 goto failure;
3811 }
3812 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3813 }
3814
3815 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3816 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3817 ret = -EINVAL;
3818 goto failure;
3819 }
3820 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3821 }
3822
3823 } else {
3824 struct in_addr inbuf;
3825
3826 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3827 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3828 ret = -EINVAL;
3829 goto failure;
3830 }
3831 nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3832 }
3833
3834 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3835 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3836 ret = -EINVAL;
3837 goto failure;
3838 }
3839 nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3840 }
3841
3842 }
3843
3844 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3845 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3846 uint32_t ikey = 0, okey = 0;
3847
3848 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3849 blobmsg_data(cur), blobmsg_len(cur));
3850
3851 if ((cur = tb_data[VTI_DATA_IKEY])) {
3852 if ((ikey = blobmsg_get_u32(cur)))
3853 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3854 }
3855
3856 if ((cur = tb_data[VTI_DATA_OKEY])) {
3857 if ((okey = blobmsg_get_u32(cur)))
3858 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3859 }
3860 }
3861
3862 nla_nest_end(nlm, infodata);
3863 nla_nest_end(nlm, linkinfo);
3864
3865 return system_rtnl_call(nlm);
3866
3867 failure:
3868 nlmsg_free(nlm);
3869 return ret;
3870 }
3871 #endif
3872
3873 #ifdef IFLA_XFRM_MAX
3874 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3875 const unsigned int link, struct blob_attr **tb)
3876 {
3877 struct nl_msg *nlm;
3878 struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3879 struct blob_attr *cur;
3880 int ret = 0;
3881
3882 nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3883 if (!nlm)
3884 return -1;
3885
3886 nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3887 nla_put_string(nlm, IFLA_IFNAME, name);
3888
3889 struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3890 if (!linkinfo) {
3891 ret = -ENOMEM;
3892 goto failure;
3893 }
3894
3895 nla_put_string(nlm, IFLA_INFO_KIND, kind);
3896 struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3897 if (!infodata) {
3898 ret = -ENOMEM;
3899 goto failure;
3900 }
3901
3902 if (link)
3903 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3904
3905 if ((cur = tb[TUNNEL_ATTR_DATA])) {
3906 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3907 uint32_t if_id = 0;
3908
3909 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3910 blobmsg_data(cur), blobmsg_len(cur));
3911
3912 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3913 if ((if_id = blobmsg_get_u32(cur)))
3914 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3915 }
3916
3917 }
3918
3919 nla_nest_end(nlm, infodata);
3920 nla_nest_end(nlm, linkinfo);
3921
3922 return system_rtnl_call(nlm);
3923
3924 failure:
3925 nlmsg_free(nlm);
3926 return ret;
3927 }
3928 #endif
3929
3930 #ifdef IFLA_VXLAN_MAX
3931 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3932 struct blob_attr *cur;
3933 if ((cur = tb_data[vxlandatatype])) {
3934 bool val = blobmsg_get_bool(cur);
3935 if (invert)
3936 val = !val;
3937
3938 if ((attrtype == IFLA_VXLAN_GBP) && val)
3939 nla_put_flag(msg, attrtype);
3940 else
3941 nla_put_u8(msg, attrtype, val);
3942
3943 }
3944 }
3945
3946 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3947 {
3948 struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3949 struct nl_msg *msg;
3950 struct nlattr *linkinfo, *data;
3951 struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3952 struct blob_attr *cur;
3953 int ret = 0;
3954
3955 if ((cur = tb[TUNNEL_ATTR_DATA]))
3956 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3957 blobmsg_data(cur), blobmsg_len(cur));
3958 else
3959 return -EINVAL;
3960
3961 msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3962
3963 if (!msg)
3964 return -1;
3965
3966 nlmsg_append(msg, &iim, sizeof(iim), 0);
3967
3968 nla_put_string(msg, IFLA_IFNAME, name);
3969
3970 if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3971 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3972 if (!ea) {
3973 ret = -EINVAL;
3974 goto failure;
3975 }
3976
3977 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3978 }
3979
3980 if ((cur = tb[TUNNEL_ATTR_MTU])) {
3981 uint32_t mtu = blobmsg_get_u32(cur);
3982 nla_put_u32(msg, IFLA_MTU, mtu);
3983 }
3984
3985 if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3986 ret = -ENOMEM;
3987 goto failure;
3988 }
3989
3990 nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3991
3992 if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3993 ret = -ENOMEM;
3994 goto failure;
3995 }
3996
3997 if (link)
3998 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3999
4000 if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
4001 uint32_t id = blobmsg_get_u32(cur);
4002 if (id >= (1u << 24) - 1) {
4003 ret = -EINVAL;
4004 goto failure;
4005 }
4006
4007 nla_put_u32(msg, IFLA_VXLAN_ID, id);
4008 }
4009
4010 if (v6) {
4011 struct in6_addr in6buf;
4012 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4013 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4014 ret = -EINVAL;
4015 goto failure;
4016 }
4017 nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
4018 }
4019
4020 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4021 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
4022 ret = -EINVAL;
4023 goto failure;
4024 }
4025 nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
4026 }
4027 } else {
4028 struct in_addr inbuf;
4029
4030 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
4031 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4032 ret = -EINVAL;
4033 goto failure;
4034 }
4035 nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
4036 }
4037
4038 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
4039 if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
4040 ret = -EINVAL;
4041 goto failure;
4042 }
4043 nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
4044 }
4045 }
4046
4047 uint32_t port = 4789;
4048 if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
4049 port = blobmsg_get_u32(cur);
4050 if (port < 1 || port > 65535) {
4051 ret = -EINVAL;
4052 goto failure;
4053 }
4054 }
4055 nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
4056
4057 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
4058 struct ifla_vxlan_port_range srcports = {0,0};
4059
4060 uint32_t low = blobmsg_get_u32(cur);
4061 if (low < 1 || low > 65535 - 1) {
4062 ret = -EINVAL;
4063 goto failure;
4064 }
4065
4066 srcports.low = htons((uint16_t) low);
4067 srcports.high = htons((uint16_t) (low+1));
4068
4069 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
4070 uint32_t high = blobmsg_get_u32(cur);
4071 if (high < 1 || high > 65535) {
4072 ret = -EINVAL;
4073 goto failure;
4074 }
4075
4076 if (high > low)
4077 srcports.high = htons((uint16_t) high);
4078 }
4079
4080 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
4081 }
4082
4083 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
4084 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
4085 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
4086 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
4087 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
4088 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
4089 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
4090 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
4091 system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
4092
4093 if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
4094 uint32_t ageing = blobmsg_get_u32(cur);
4095 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
4096 }
4097
4098 if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
4099 uint32_t maxaddress = blobmsg_get_u32(cur);
4100 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
4101 }
4102
4103 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4104 char *str = blobmsg_get_string(cur);
4105 unsigned tos = 1;
4106
4107 if (strcmp(str, "inherit")) {
4108 if (!system_tos_aton(str, &tos)) {
4109 ret = -EINVAL;
4110 goto failure;
4111 }
4112 }
4113
4114 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
4115 }
4116
4117 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4118 uint32_t ttl = blobmsg_get_u32(cur);
4119 if (ttl < 1 || ttl > 255) {
4120 ret = -EINVAL;
4121 goto failure;
4122 }
4123
4124 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
4125 }
4126
4127 nla_nest_end(msg, data);
4128 nla_nest_end(msg, linkinfo);
4129
4130 ret = system_rtnl_call(msg);
4131 if (ret)
4132 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
4133
4134 return ret;
4135
4136 failure:
4137 nlmsg_free(msg);
4138 return ret;
4139 }
4140 #endif
4141
4142 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
4143 {
4144 struct blob_attr *cur;
4145 int ret = 0;
4146
4147 if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
4148 return -1;
4149
4150 #ifdef SIOCADD6RD
4151 if ((cur = tb[TUNNEL_ATTR_DATA])) {
4152 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
4153 unsigned int mask;
4154 struct ip_tunnel_6rd p6;
4155
4156 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
4157 blobmsg_data(cur), blobmsg_len(cur));
4158
4159 memset(&p6, 0, sizeof(p6));
4160
4161 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
4162 if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
4163 &p6.prefix, &mask) || mask > 128) {
4164 ret = -EINVAL;
4165 goto failure;
4166 }
4167
4168 p6.prefixlen = mask;
4169 }
4170
4171 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
4172 if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
4173 &p6.relay_prefix, &mask) || mask > 32) {
4174 ret = -EINVAL;
4175 goto failure;
4176 }
4177
4178 p6.relay_prefixlen = mask;
4179 }
4180
4181 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
4182 ret = -1;
4183 goto failure;
4184 }
4185 }
4186 #endif
4187
4188 return ret;
4189
4190 failure:
4191 system_link_del(name);
4192 return ret;
4193 }
4194
4195 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
4196 {
4197 struct blob_attr *cur;
4198 bool set_df = true;
4199 struct ip_tunnel_parm p = {
4200 .link = link,
4201 .iph = {
4202 .version = 4,
4203 .ihl = 5,
4204 .protocol = proto,
4205 }
4206 };
4207
4208 if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
4209 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
4210 return -EINVAL;
4211
4212 if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
4213 inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
4214 return -EINVAL;
4215
4216 if ((cur = tb[TUNNEL_ATTR_DF]))
4217 set_df = blobmsg_get_bool(cur);
4218
4219 if ((cur = tb[TUNNEL_ATTR_TTL]))
4220 p.iph.ttl = blobmsg_get_u32(cur);
4221
4222 if ((cur = tb[TUNNEL_ATTR_TOS])) {
4223 char *str = blobmsg_get_string(cur);
4224 if (strcmp(str, "inherit")) {
4225 unsigned uval;
4226
4227 if (!system_tos_aton(str, &uval))
4228 return -EINVAL;
4229
4230 p.iph.tos = uval;
4231 } else
4232 p.iph.tos = 1;
4233 }
4234
4235 p.iph.frag_off = set_df ? htons(IP_DF) : 0;
4236 /* ttl !=0 and nopmtudisc are incompatible */
4237 if (p.iph.ttl && p.iph.frag_off == 0)
4238 return -EINVAL;
4239
4240 strncpy(p.name, name, sizeof(p.name) - 1);
4241
4242 switch (p.iph.protocol) {
4243 case IPPROTO_IPIP:
4244 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
4245 case IPPROTO_IPV6:
4246 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
4247 default:
4248 break;
4249 }
4250 return -1;
4251 }
4252
4253 int system_del_ip_tunnel(const struct device *dev)
4254 {
4255 return system_link_del(dev->ifname);
4256 }
4257
4258 int system_update_ipv6_mtu(struct device *dev, int mtu)
4259 {
4260 int ret = -1;
4261 char buf[64];
4262 int fd;
4263
4264 fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
4265 if (fd < 0)
4266 return ret;
4267
4268 if (!mtu) {
4269 ssize_t len = read(fd, buf, sizeof(buf) - 1);
4270 if (len < 0)
4271 goto out;
4272
4273 buf[len] = 0;
4274 ret = atoi(buf);
4275 } else {
4276 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
4277 ret = mtu;
4278 }
4279
4280 out:
4281 close(fd);
4282 return ret;
4283 }
4284
4285 int system_add_ip_tunnel(const struct device *dev, struct blob_attr *attr)
4286 {
4287 struct blob_attr *tb[__TUNNEL_ATTR_MAX];
4288 struct blob_attr *cur;
4289 const char *str;
4290
4291 blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
4292 blob_data(attr), blob_len(attr));
4293
4294 system_link_del(dev->ifname);
4295
4296 if (!(cur = tb[TUNNEL_ATTR_TYPE]))
4297 return -EINVAL;
4298 str = blobmsg_data(cur);
4299
4300 unsigned int ttl = 0;
4301 if ((cur = tb[TUNNEL_ATTR_TTL])) {
4302 ttl = blobmsg_get_u32(cur);
4303 if (ttl > 255)
4304 return -EINVAL;
4305 }
4306
4307 unsigned int link = 0;
4308 if ((cur = tb[TUNNEL_ATTR_LINK])) {
4309 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
4310 if (!iface)
4311 return -EINVAL;
4312
4313 if (iface->l3_dev.dev)
4314 link = iface->l3_dev.dev->ifindex;
4315 }
4316
4317 if (!strcmp(str, "sit"))
4318 return system_add_sit_tunnel(dev->ifname, link, tb);
4319 #ifdef IFLA_IPTUN_MAX
4320 else if (!strcmp(str, "ipip6")) {
4321 return system_add_ip6_tunnel(dev->ifname, link, tb);
4322 } else if (!strcmp(str, "greip")) {
4323 return system_add_gre_tunnel(dev->ifname, "gre", link, tb, false);
4324 } else if (!strcmp(str, "gretapip")) {
4325 return system_add_gre_tunnel(dev->ifname, "gretap", link, tb, false);
4326 } else if (!strcmp(str, "greip6")) {
4327 return system_add_gre_tunnel(dev->ifname, "ip6gre", link, tb, true);
4328 } else if (!strcmp(str, "gretapip6")) {
4329 return system_add_gre_tunnel(dev->ifname, "ip6gretap", link, tb, true);
4330 #ifdef IFLA_VTI_MAX
4331 } else if (!strcmp(str, "vtiip")) {
4332 return system_add_vti_tunnel(dev->ifname, "vti", link, tb, false);
4333 } else if (!strcmp(str, "vtiip6")) {
4334 return system_add_vti_tunnel(dev->ifname, "vti6", link, tb, true);
4335 #endif
4336 #ifdef IFLA_XFRM_MAX
4337 } else if (!strcmp(str, "xfrm")) {
4338 return system_add_xfrm_tunnel(dev->ifname, "xfrm", link, tb);
4339 #endif
4340 #ifdef IFLA_VXLAN_MAX
4341 } else if(!strcmp(str, "vxlan")) {
4342 return system_add_vxlan(dev->ifname, link, tb, false);
4343 } else if(!strcmp(str, "vxlan6")) {
4344 return system_add_vxlan(dev->ifname, link, tb, true);
4345 #endif
4346 #endif
4347 } else if (!strcmp(str, "ipip")) {
4348 return system_add_proto_tunnel(dev->ifname, IPPROTO_IPIP, link, tb);
4349 }
4350 else
4351 return -EINVAL;
4352
4353 return 0;
4354 }
OpenWrt Network interface configuration daemon