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 #ifndef RTN_FAILED_POLICY
 52 #define RTN_FAILED_POLICY 12
 53 #endif
 54 
 55 #ifndef IFA_F_NOPREFIXROUTE
 56 #define IFA_F_NOPREFIXROUTE 0x200
 57 #endif
 58 
 59 #ifndef IFA_FLAGS
 60 #define IFA_FLAGS (IFA_MULTICAST + 1)
 61 #endif
 62 
 63 #include <string.h>
 64 #include <fcntl.h>
 65 #include <glob.h>
 66 #include <time.h>
 67 #include <unistd.h>
 68 
 69 #include <netlink/msg.h>
 70 #include <netlink/attr.h>
 71 #include <netlink/socket.h>
 72 #include <libubox/uloop.h>
 73 
 74 #include "netifd.h"
 75 #include "device.h"
 76 #include "system.h"
 77 #include "utils.h"
 78 
 79 struct event_socket {
 80         struct uloop_fd uloop;
 81         struct nl_sock *sock;
 82         int bufsize;
 83 };
 84 
 85 static int sock_ioctl = -1;
 86 static struct nl_sock *sock_rtnl = NULL;
 87 
 88 static int cb_rtnl_event(struct nl_msg *msg, void *arg);
 89 static void handle_hotplug_event(struct uloop_fd *u, unsigned int events);
 90 static int system_add_proto_tunnel(const char *name, const uint8_t proto,
 91                                         const unsigned int link, struct blob_attr **tb);
 92 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb);
 93 
 94 static char dev_buf[256];
 95 static const char *proc_path = "/proc";
 96 static const char *sysfs_path = "/sys";
 97 
 98 static void
 99 handler_nl_event(struct uloop_fd *u, unsigned int events)
100 {
101         struct event_socket *ev = container_of(u, struct event_socket, uloop);
102         int err;
103         socklen_t errlen = sizeof(err);
104 
105         if (!u->error) {
106                 nl_recvmsgs_default(ev->sock);
107                 return;
108         }
109 
110         if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
111                 goto abort;
112 
113         switch(err) {
114         case ENOBUFS:
115                 /* Increase rx buffer size on netlink socket */
116                 ev->bufsize *= 2;
117                 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
118                         goto abort;
119 
120                 /* Request full dump since some info got dropped */
121                 struct rtgenmsg msg = { .rtgen_family = AF_UNSPEC };
122                 nl_send_simple(ev->sock, RTM_GETLINK, NLM_F_DUMP, &msg, sizeof(msg));
123                 break;
124 
125         default:
126                 goto abort;
127         }
128         u->error = false;
129         return;
130 
131 abort:
132         uloop_fd_delete(&ev->uloop);
133         return;
134 }
135 
136 static struct nl_sock *
137 create_socket(int protocol, int groups)
138 {
139         struct nl_sock *sock;
140 
141         sock = nl_socket_alloc();
142         if (!sock)
143                 return NULL;
144 
145         if (groups)
146                 nl_join_groups(sock, groups);
147 
148         if (nl_connect(sock, protocol)) {
149                 nl_socket_free(sock);
150                 return NULL;
151         }
152 
153         return sock;
154 }
155 
156 static bool
157 create_raw_event_socket(struct event_socket *ev, int protocol, int groups,
158                         uloop_fd_handler cb, int flags)
159 {
160         ev->sock = create_socket(protocol, groups);
161         if (!ev->sock)
162                 return false;
163 
164         ev->uloop.fd = nl_socket_get_fd(ev->sock);
165         ev->uloop.cb = cb;
166         if (uloop_fd_add(&ev->uloop, ULOOP_READ|flags))
167                 return false;
168 
169         return true;
170 }
171 
172 static bool
173 create_event_socket(struct event_socket *ev, int protocol,
174                     int (*cb)(struct nl_msg *msg, void *arg))
175 {
176         if (!create_raw_event_socket(ev, protocol, 0, handler_nl_event, ULOOP_ERROR_CB))
177                 return false;
178 
179         /* Install the valid custom callback handler */
180         nl_socket_modify_cb(ev->sock, NL_CB_VALID, NL_CB_CUSTOM, cb, NULL);
181 
182         /* Disable sequence number checking on event sockets */
183         nl_socket_disable_seq_check(ev->sock);
184 
185         /* Increase rx buffer size to 65K on event sockets */
186         ev->bufsize = 65535;
187         if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
188                 return false;
189 
190         return true;
191 }
192 
193 static bool
194 create_hotplug_event_socket(struct event_socket *ev, int protocol,
195                             void (*cb)(struct uloop_fd *u, unsigned int events))
196 {
197         if (!create_raw_event_socket(ev, protocol, 1, cb, ULOOP_ERROR_CB))
198                 return false;
199 
200         /* Increase rx buffer size to 65K on event sockets */
201         ev->bufsize = 65535;
202         if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
203                 return false;
204 
205         return true;
206 }
207 
208 static bool
209 system_rtn_aton(const char *src, unsigned int *dst)
210 {
211         char *e;
212         unsigned int n;
213 
214         if (!strcmp(src, "local"))
215                 n = RTN_LOCAL;
216         else if (!strcmp(src, "nat"))
217                 n = RTN_NAT;
218         else if (!strcmp(src, "broadcast"))
219                 n = RTN_BROADCAST;
220         else if (!strcmp(src, "anycast"))
221                 n = RTN_ANYCAST;
222         else if (!strcmp(src, "multicast"))
223                 n = RTN_MULTICAST;
224         else if (!strcmp(src, "prohibit"))
225                 n = RTN_PROHIBIT;
226         else if (!strcmp(src, "unreachable"))
227                 n = RTN_UNREACHABLE;
228         else if (!strcmp(src, "blackhole"))
229                 n = RTN_BLACKHOLE;
230         else if (!strcmp(src, "xresolve"))
231                 n = RTN_XRESOLVE;
232         else if (!strcmp(src, "unicast"))
233                 n = RTN_UNICAST;
234         else if (!strcmp(src, "throw"))
235                 n = RTN_THROW;
236         else if (!strcmp(src, "failed_policy"))
237                 n = RTN_FAILED_POLICY;
238         else {
239                 n = strtoul(src, &e, 0);
240                 if (!e || *e || e == src || n > 255)
241                         return false;
242         }
243 
244         *dst = n;
245         return true;
246 }
247 
248 static bool
249 system_tos_aton(const char *src, unsigned *dst)
250 {
251         char *e;
252 
253         *dst = strtoul(src, &e, 16);
254         if (e == src || *e || *dst > 255)
255                 return false;
256 
257         return true;
258 }
259 
260 int system_init(void)
261 {
262         static struct event_socket rtnl_event;
263         static struct event_socket hotplug_event;
264 
265         sock_ioctl = socket(AF_LOCAL, SOCK_DGRAM, 0);
266         system_fd_set_cloexec(sock_ioctl);
267 
268         /* Prepare socket for routing / address control */
269         sock_rtnl = create_socket(NETLINK_ROUTE, 0);
270         if (!sock_rtnl)
271                 return -1;
272 
273         if (!create_event_socket(&rtnl_event, NETLINK_ROUTE, cb_rtnl_event))
274                 return -1;
275 
276         if (!create_hotplug_event_socket(&hotplug_event, NETLINK_KOBJECT_UEVENT,
277                                          handle_hotplug_event))
278                 return -1;
279 
280         /* Receive network link events form kernel */
281         nl_socket_add_membership(rtnl_event.sock, RTNLGRP_LINK);
282 
283         return 0;
284 }
285 
286 static void write_file(const char *path, const char *val)
287 {
288         int fd;
289 
290         fd = open(path, O_WRONLY);
291         if (fd < 0)
292                 return;
293 
294         if (write(fd, val, strlen(val))) {}
295         close(fd);
296 }
297 
298 static int read_file(const char *path, char *buf, const size_t buf_sz)
299 {
300         int fd = -1, ret = -1;
301 
302         fd = open(path, O_RDONLY);
303         if (fd < 0)
304                 goto out;
305 
306         ssize_t len = read(fd, buf, buf_sz - 1);
307         if (len < 0)
308                 goto out;
309 
310         ret = buf[len] = 0;
311 
312 out:
313         if (fd >= 0)
314                 close(fd);
315 
316         return ret;
317 }
318 
319 
320 static const char *
321 dev_sysctl_path(const char *prefix, const char *ifname, const char *file)
322 {
323         snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/%s/%s", proc_path, prefix, ifname, file);
324 
325         return dev_buf;
326 }
327 
328 static const char *
329 dev_sysfs_path(const char *ifname, const char *file)
330 {
331         snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/%s/%s", sysfs_path, ifname, file);
332 
333         return dev_buf;
334 }
335 
336 static void
337 system_set_dev_sysctl(const char *prefix, const char *file, const char *ifname,
338                       const char *val)
339 {
340         write_file(dev_sysctl_path(prefix, ifname, file), val);
341 }
342 
343 static int
344 system_get_dev_sysctl(const char *prefix, const char *file, const char *ifname,
345                       char *buf, size_t buf_sz)
346 {
347         return read_file(dev_sysctl_path(prefix, ifname, file), buf, buf_sz);
348 }
349 
350 static void
351 system_set_dev_sysfs(const char *file, const char *ifname, const char *val)
352 {
353         if (!val)
354                 return;
355 
356         write_file(dev_sysfs_path(ifname, file), val);
357 }
358 
359 static void
360 system_set_dev_sysfs_int(const char *file, const char *ifname, int val)
361 {
362         char buf[16];
363 
364         snprintf(buf, sizeof(buf), "%d", val);
365         system_set_dev_sysfs(file, ifname, buf);
366 }
367 
368 static int
369 system_get_dev_sysfs(const char *file, const char *ifname, char *buf, size_t buf_sz)
370 {
371         return read_file(dev_sysfs_path(ifname, file), buf, buf_sz);
372 }
373 
374 static void system_set_disable_ipv6(struct device *dev, const char *val)
375 {
376         system_set_dev_sysctl("ipv6/conf", "disable_ipv6", dev->ifname, val);
377 }
378 
379 static void system_set_ip6segmentrouting(struct device *dev, const char *val)
380 {
381         system_set_dev_sysctl("ipv6/conf", "seg6_enabled", dev->ifname, val);
382 }
383 
384 static void system_set_rpfilter(struct device *dev, const char *val)
385 {
386         system_set_dev_sysctl("ipv4/conf", "rp_filter", dev->ifname, val);
387 }
388 
389 static void system_set_acceptlocal(struct device *dev, const char *val)
390 {
391         system_set_dev_sysctl("ipv4/conf", "accept_local", dev->ifname, val);
392 }
393 
394 static void system_set_igmpversion(struct device *dev, const char *val)
395 {
396         system_set_dev_sysctl("ipv4/conf", "force_igmp_version", dev->ifname, val);
397 }
398 
399 static void system_set_mldversion(struct device *dev, const char *val)
400 {
401         system_set_dev_sysctl("ipv6/conf", "force_mld_version", dev->ifname, val);
402 }
403 
404 static void system_set_neigh4reachabletime(struct device *dev, const char *val)
405 {
406         system_set_dev_sysctl("ipv4/neigh", "base_reachable_time_ms", dev->ifname, val);
407 }
408 
409 static void system_set_neigh6reachabletime(struct device *dev, const char *val)
410 {
411         system_set_dev_sysctl("ipv6/neigh", "base_reachable_time_ms", dev->ifname, val);
412 }
413 
414 static void system_set_neigh4gcstaletime(struct device *dev, const char *val)
415 {
416         system_set_dev_sysctl("ipv4/neigh", "gc_stale_time", dev->ifname, val);
417 }
418 
419 static void system_set_neigh6gcstaletime(struct device *dev, const char *val)
420 {
421         system_set_dev_sysctl("ipv6/neigh", "gc_stale_time", dev->ifname, val);
422 }
423 
424 static void system_set_neigh4locktime(struct device *dev, const char *val)
425 {
426         system_set_dev_sysctl("ipv4/neigh", "locktime", dev->ifname, val);
427 }
428 
429 static void system_set_dadtransmits(struct device *dev, const char *val)
430 {
431         system_set_dev_sysctl("ipv6/conf", "dad_transmits", dev->ifname, val);
432 }
433 
434 static void system_set_sendredirects(struct device *dev, const char *val)
435 {
436         system_set_dev_sysctl("ipv4/conf", "send_redirects", dev->ifname, val);
437 }
438 
439 static void system_set_drop_v4_unicast_in_l2_multicast(struct device *dev, const char *val)
440 {
441         system_set_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
442 }
443 
444 static void system_set_drop_v6_unicast_in_l2_multicast(struct device *dev, const char *val)
445 {
446         system_set_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast", dev->ifname, val);
447 }
448 
449 static void system_set_drop_gratuitous_arp(struct device *dev, const char *val)
450 {
451         system_set_dev_sysctl("ipv4/conf", "drop_gratuitous_arp", dev->ifname, val);
452 }
453 
454 static void system_set_drop_unsolicited_na(struct device *dev, const char *val)
455 {
456         system_set_dev_sysctl("ipv6/conf", "drop_unsolicited_na", dev->ifname, val);
457 }
458 
459 static void system_set_arp_accept(struct device *dev, const char *val)
460 {
461         system_set_dev_sysctl("ipv4/conf", "arp_accept", dev->ifname, val);
462 }
463 
464 static void system_bridge_set_multicast_to_unicast(struct device *dev, const char *val)
465 {
466         system_set_dev_sysfs("brport/multicast_to_unicast", dev->ifname, val);
467 }
468 
469 static void system_bridge_set_multicast_fast_leave(struct device *dev, const char *val)
470 {
471         system_set_dev_sysfs("brport/multicast_fast_leave", dev->ifname, val);
472 }
473 
474 static void system_bridge_set_hairpin_mode(struct device *dev, const char *val)
475 {
476         system_set_dev_sysfs("brport/hairpin_mode", dev->ifname, val);
477 }
478 
479 static void system_bridge_set_proxyarp_wifi(struct device *dev, const char *val)
480 {
481         system_set_dev_sysfs("brport/proxyarp_wifi", dev->ifname, val);
482 }
483 
484 static void system_bridge_set_bpdu_filter(struct device *dev, const char *val)
485 {
486         system_set_dev_sysfs("brport/bpdu_filter", dev->ifname, val);
487 }
488 
489 static void system_bridge_set_isolated(struct device *dev, const char *val)
490 {
491         system_set_dev_sysfs("brport/isolated", dev->ifname, val);
492 }
493 
494 static void system_bridge_set_multicast_router(struct device *dev, const char *val, bool bridge)
495 {
496         system_set_dev_sysfs(bridge ? "bridge/multicast_router" :
497                                       "brport/multicast_router",
498                               dev->ifname, val);
499 }
500 
501 static void system_bridge_set_robustness(struct device *dev, const char *val)
502 {
503         system_set_dev_sysfs("bridge/multicast_startup_query_count",
504                               dev->ifname, val);
505         system_set_dev_sysfs("bridge/multicast_last_member_count",
506                               dev->ifname, val);
507 }
508 
509 static void system_bridge_set_query_interval(struct device *dev, const char *val)
510 {
511         system_set_dev_sysfs("bridge/multicast_query_interval",
512                               dev->ifname, val);
513 }
514 
515 static void system_bridge_set_query_response_interval(struct device *dev, const char *val)
516 {
517         system_set_dev_sysfs("bridge/multicast_query_response_interval",
518                               dev->ifname, val);
519 }
520 
521 static void system_bridge_set_last_member_interval(struct device *dev, const char *val)
522 {
523         system_set_dev_sysfs("bridge/multicast_last_member_interval",
524                               dev->ifname, val);
525 }
526 
527 static void system_bridge_set_membership_interval(struct device *dev, const char *val)
528 {
529         system_set_dev_sysfs("bridge/multicast_membership_interval",
530                               dev->ifname, val);
531 }
532 
533 static void system_bridge_set_other_querier_timeout(struct device *dev, const char *val)
534 {
535         system_set_dev_sysfs("bridge/multicast_querier_interval",
536                               dev->ifname, val);
537 }
538 
539 static void system_bridge_set_startup_query_interval(struct device *dev, const char *val)
540 {
541         system_set_dev_sysfs("bridge/multicast_startup_query_interval",
542                               dev->ifname, val);
543 }
544 
545 void system_bridge_set_stp_state(struct device *dev, bool val)
546 {
547         const char *valstr = val ? "1" : "";
548 
549         system_set_dev_sysfs("bridge/stp_state", dev->ifname, valstr);
550 }
551 
552 static void system_bridge_set_forward_delay(struct device *dev, const char *val)
553 {
554         system_set_dev_sysfs("bridge/forward_delay", dev->ifname, val);
555 }
556 
557 static void system_bridge_set_priority(struct device *dev, const char *val)
558 {
559         system_set_dev_sysfs("bridge/priority", dev->ifname, val);
560 }
561 
562 static void system_bridge_set_ageing_time(struct device *dev, const char *val)
563 {
564         system_set_dev_sysfs("bridge/ageing_time", dev->ifname, val);
565 }
566 
567 static void system_bridge_set_hello_time(struct device *dev, const char *val)
568 {
569         system_set_dev_sysfs("bridge/hello_time", dev->ifname, val);
570 }
571 
572 static void system_bridge_set_max_age(struct device *dev, const char *val)
573 {
574         system_set_dev_sysfs("bridge/max_age", dev->ifname, val);
575 }
576 
577 static void system_bridge_set_learning(struct device *dev, const char *val)
578 {
579         system_set_dev_sysfs("brport/learning", dev->ifname, val);
580 }
581 
582 static void system_bridge_set_unicast_flood(struct device *dev, const char *val)
583 {
584         system_set_dev_sysfs("brport/unicast_flood", dev->ifname, val);
585 }
586 
587 static void system_bridge_set_vlan_filtering(struct device *dev, const char *val)
588 {
589         system_set_dev_sysfs("bridge/vlan_filtering", dev->ifname, val);
590 }
591 
592 static int system_get_disable_ipv6(struct device *dev, char *buf, const size_t buf_sz)
593 {
594         return system_get_dev_sysctl("ipv6/conf", "disable_ipv6",
595                                      dev->ifname, buf, buf_sz);
596 }
597 
598 static int system_get_ip6segmentrouting(struct device *dev, char *buf, const size_t buf_sz)
599 {
600         return system_get_dev_sysctl("ipv6/conf", "seg6_enabled",
601                                      dev->ifname, buf, buf_sz);
602 }
603 
604 static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_sz)
605 {
606         return system_get_dev_sysctl("ipv4/conf", "rp_filter",
607                                      dev->ifname, buf, buf_sz);
608 }
609 
610 static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
611 {
612         return system_get_dev_sysctl("ipv4/conf", "accept_local",
613                                      dev->ifname, buf, buf_sz);
614 }
615 
616 static int system_get_igmpversion(struct device *dev, char *buf, const size_t buf_sz)
617 {
618         return system_get_dev_sysctl("ipv4/conf", "force_igmp_version",
619                                      dev->ifname, buf, buf_sz);
620 }
621 
622 static int system_get_mldversion(struct device *dev, char *buf, const size_t buf_sz)
623 {
624         return system_get_dev_sysctl("ipv6/conf", "force_mld_version",
625                                      dev->ifname, buf, buf_sz);
626 }
627 
628 static int system_get_neigh4reachabletime(struct device *dev, char *buf, const size_t buf_sz)
629 {
630         return system_get_dev_sysctl("ipv4/neigh", "base_reachable_time_ms",
631                                      dev->ifname, buf, buf_sz);
632 }
633 
634 static int system_get_neigh6reachabletime(struct device *dev, char *buf, const size_t buf_sz)
635 {
636         return system_get_dev_sysctl("ipv6/neigh", "base_reachable_time_ms",
637                                      dev->ifname, buf, buf_sz);
638 }
639 
640 static int system_get_neigh4gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
641 {
642         return system_get_dev_sysctl("ipv4/neigh", "gc_stale_time",
643                                      dev->ifname, buf, buf_sz);
644 }
645 
646 static int system_get_neigh6gcstaletime(struct device *dev, char *buf, const size_t buf_sz)
647 {
648         return system_get_dev_sysctl("ipv6/neigh", "gc_stale_time",
649                         dev->ifname, buf, buf_sz);
650 }
651 
652 static int system_get_neigh4locktime(struct device *dev, char *buf, const size_t buf_sz)
653 {
654         return system_get_dev_sysctl("ipv4/neigh", "locktime",
655                         dev->ifname, buf, buf_sz);
656 }
657 
658 static int system_get_dadtransmits(struct device *dev, char *buf, const size_t buf_sz)
659 {
660         return system_get_dev_sysctl("ipv6/conf", "dad_transmits",
661                         dev->ifname, buf, buf_sz);
662 }
663 
664 static int system_get_sendredirects(struct device *dev, char *buf, const size_t buf_sz)
665 {
666         return system_get_dev_sysctl("ipv4/conf", "send_redirects",
667                         dev->ifname, buf, buf_sz);
668 }
669 
670 
671 static int system_get_drop_v4_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
672 {
673         return system_get_dev_sysctl("ipv4/conf", "drop_unicast_in_l2_multicast",
674                         dev->ifname, buf, buf_sz);
675 }
676 
677 static int system_get_drop_v6_unicast_in_l2_multicast(struct device *dev, char *buf, const size_t buf_sz)
678 {
679         return system_get_dev_sysctl("ipv6/conf", "drop_unicast_in_l2_multicast",
680                         dev->ifname, buf, buf_sz);
681 }
682 
683 static int system_get_drop_gratuitous_arp(struct device *dev, char *buf, const size_t buf_sz)
684 {
685         return system_get_dev_sysctl("ipv4/conf", "drop_gratuitous_arp",
686                         dev->ifname, buf, buf_sz);
687 }
688 
689 static int system_get_drop_unsolicited_na(struct device *dev, char *buf, const size_t buf_sz)
690 {
691         return system_get_dev_sysctl("ipv6/conf", "drop_unsolicited_na",
692                         dev->ifname, buf, buf_sz);
693 }
694 
695 static int system_get_arp_accept(struct device *dev, char *buf, const size_t buf_sz)
696 {
697         return system_get_dev_sysctl("ipv4/conf", "arp_accept",
698                         dev->ifname, buf, buf_sz);
699 }
700 
701 /* Evaluate netlink messages */
702 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
703 {
704         struct nlmsghdr *nh = nlmsg_hdr(msg);
705         struct nlattr *nla[__IFLA_MAX];
706         int link_state = 0;
707         char buf[10];
708 
709         if (nh->nlmsg_type != RTM_NEWLINK)
710                 goto out;
711 
712         nlmsg_parse(nh, sizeof(struct ifinfomsg), nla, __IFLA_MAX - 1, NULL);
713         if (!nla[IFLA_IFNAME])
714                 goto out;
715 
716         struct device *dev = device_find(nla_data(nla[IFLA_IFNAME]));
717         if (!dev)
718                 goto out;
719 
720         if (!system_get_dev_sysfs("carrier", dev->ifname, buf, sizeof(buf)))
721                 link_state = strtoul(buf, NULL, 0);
722 
723         if (dev->type == &simple_device_type)
724                 device_set_present(dev, true);
725 
726         device_set_link(dev, link_state ? true : false);
727 
728 out:
729         return 0;
730 }
731 
732 static void
733 handle_hotplug_msg(char *data, int size)
734 {
735         const char *subsystem = NULL, *interface = NULL, *interface_old = NULL;
736         char *cur, *end, *sep;
737         int skip;
738         bool add;
739 
740         if (!strncmp(data, "add@", 4) || !strncmp(data, "move@", 5))
741                 add = true;
742         else if (!strncmp(data, "remove@", 7))
743                 add = false;
744         else
745                 return;
746 
747         skip = strlen(data) + 1;
748         end = data + size;
749 
750         for (cur = data + skip; cur < end; cur += skip) {
751                 skip = strlen(cur) + 1;
752 
753                 sep = strchr(cur, '=');
754                 if (!sep)
755                         continue;
756 
757                 *sep = 0;
758                 if (!strcmp(cur, "INTERFACE"))
759                         interface = sep + 1;
760                 else if (!strcmp(cur, "SUBSYSTEM")) {
761                         subsystem = sep + 1;
762                         if (strcmp(subsystem, "net") != 0)
763                                 return;
764                 } else if (!strcmp(cur, "DEVPATH_OLD")) {
765                         interface_old = strrchr(sep + 1, '/');
766                         if (interface_old)
767                                 interface_old++;
768                 }
769         }
770 
771         if (!subsystem || !interface)
772                 return;
773 
774         if (interface_old)
775                 device_hotplug_event(interface_old, false);
776 
777         device_hotplug_event(interface, add);
778 }
779 
780 static void
781 handle_hotplug_event(struct uloop_fd *u, unsigned int events)
782 {
783         struct event_socket *ev = container_of(u, struct event_socket, uloop);
784         struct sockaddr_nl nla;
785         unsigned char *buf = NULL;
786         int size;
787         int err;
788         socklen_t errlen = sizeof(err);
789 
790         if (!u->error) {
791                 while ((size = nl_recv(ev->sock, &nla, &buf, NULL)) > 0) {
792                         if (nla.nl_pid == 0)
793                                 handle_hotplug_msg((char *) buf, size);
794 
795                         free(buf);
796                 }
797                 return;
798         }
799 
800         if (getsockopt(u->fd, SOL_SOCKET, SO_ERROR, (void *)&err, &errlen))
801                 goto abort;
802 
803         switch(err) {
804         case ENOBUFS:
805                 /* Increase rx buffer size on netlink socket */
806                 ev->bufsize *= 2;
807                 if (nl_socket_set_buffer_size(ev->sock, ev->bufsize, 0))
808                         goto abort;
809                 break;
810 
811         default:
812                 goto abort;
813         }
814         u->error = false;
815         return;
816 
817 abort:
818         uloop_fd_delete(&ev->uloop);
819         return;
820 }
821 
822 static int system_rtnl_call(struct nl_msg *msg)
823 {
824         int ret;
825 
826         ret = nl_send_auto_complete(sock_rtnl, msg);
827         nlmsg_free(msg);
828 
829         if (ret < 0)
830                 return ret;
831 
832         return nl_wait_for_ack(sock_rtnl);
833 }
834 
835 int system_bridge_delbr(struct device *bridge)
836 {
837         return ioctl(sock_ioctl, SIOCBRDELBR, bridge->ifname);
838 }
839 
840 static int system_bridge_if(const char *bridge, struct device *dev, int cmd, void *data)
841 {
842         struct ifreq ifr;
843 
844         memset(&ifr, 0, sizeof(ifr));
845         if (dev)
846                 ifr.ifr_ifindex = dev->ifindex;
847         else
848                 ifr.ifr_data = data;
849         strncpy(ifr.ifr_name, bridge, sizeof(ifr.ifr_name) - 1);
850         return ioctl(sock_ioctl, cmd, &ifr);
851 }
852 
853 static bool system_is_bridge(const char *name)
854 {
855         struct stat st;
856 
857         return stat(dev_sysfs_path(name, "bridge"), &st) >= 0;
858 }
859 
860 static char *system_get_bridge(const char *name, char *buf, int buflen)
861 {
862         char *path;
863         ssize_t len = -1;
864         glob_t gl;
865 
866         snprintf(buf, buflen, "%s/devices/virtual/net/*/brif/%s/bridge", sysfs_path, name);
867         if (glob(buf, GLOB_NOSORT, NULL, &gl) < 0)
868                 return NULL;
869 
870         if (gl.gl_pathc > 0)
871                 len = readlink(gl.gl_pathv[0], buf, buflen);
872 
873         globfree(&gl);
874 
875         if (len < 0)
876                 return NULL;
877 
878         buf[len] = 0;
879         path = strrchr(buf, '/');
880         if (!path)
881                 return NULL;
882 
883         return path + 1;
884 }
885 
886 static void
887 system_bridge_set_wireless(struct device *bridge, struct device *dev)
888 {
889         bool mcast_to_ucast = dev->wireless_ap;
890         bool hairpin;
891 
892         if (bridge->settings.flags & DEV_OPT_MULTICAST_TO_UNICAST &&
893             !bridge->settings.multicast_to_unicast)
894                 mcast_to_ucast = false;
895 
896         hairpin = mcast_to_ucast || dev->wireless_proxyarp;
897         if (dev->wireless_isolate)
898                 hairpin = false;
899 
900         system_bridge_set_multicast_to_unicast(dev, mcast_to_ucast ? "1" : "");
901         system_bridge_set_hairpin_mode(dev, hairpin ? "1" : "");
902         system_bridge_set_proxyarp_wifi(dev, dev->wireless_proxyarp ? "1" : "");
903 }
904 
905 int system_bridge_addif(struct device *bridge, struct device *dev)
906 {
907         char buf[64];
908         char *oldbr;
909         int tries = 0;
910         int ret;
911 
912 retry:
913         ret = 0;
914         oldbr = system_get_bridge(dev->ifname, dev_buf, sizeof(dev_buf));
915         if (!oldbr || strcmp(oldbr, bridge->ifname) != 0) {
916                 ret = system_bridge_if(bridge->ifname, dev, SIOCBRADDIF, NULL);
917                 tries++;
918                 D(SYSTEM, "Failed to add device '%s' to bridge '%s' (tries=%d): %s\n",
919                   dev->ifname, bridge->ifname, tries, strerror(errno));
920                 if (tries <= 3)
921                         goto retry;
922         }
923 
924         if (dev->wireless)
925                 system_bridge_set_wireless(bridge, dev);
926 
927         if (dev->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
928                 snprintf(buf, sizeof(buf), "%u", dev->settings.multicast_router);
929                 system_bridge_set_multicast_router(dev, buf, false);
930         }
931 
932         if (dev->settings.flags & DEV_OPT_MULTICAST_FAST_LEAVE &&
933             dev->settings.multicast_fast_leave)
934                 system_bridge_set_multicast_fast_leave(dev, "1");
935 
936         if (dev->settings.flags & DEV_OPT_LEARNING &&
937             !dev->settings.learning)
938                 system_bridge_set_learning(dev, "");
939 
940         if (dev->settings.flags & DEV_OPT_UNICAST_FLOOD &&
941             !dev->settings.unicast_flood)
942                 system_bridge_set_unicast_flood(dev, "");
943 
944         if (dev->settings.flags & DEV_OPT_ISOLATE &&
945             dev->settings.isolate)
946                 system_bridge_set_isolated(dev, "1");
947 
948         if (dev->bpdu_filter)
949                 system_bridge_set_bpdu_filter(dev, dev->bpdu_filter ? "1" : "");
950 
951         return ret;
952 }
953 
954 int system_bridge_delif(struct device *bridge, struct device *dev)
955 {
956         return system_bridge_if(bridge->ifname, dev, SIOCBRDELIF, NULL);
957 }
958 
959 int system_bridge_vlan(const char *iface, uint16_t vid, bool add, unsigned int vflags)
960 {
961         struct ifinfomsg ifi = { .ifi_family = PF_BRIDGE, };
962         struct bridge_vlan_info vinfo = { .vid = vid, };
963         unsigned short flags = 0;
964         struct nlattr *afspec;
965         struct nl_msg *nlm;
966         int ret = 0;
967 
968         ifi.ifi_index = if_nametoindex(iface);
969         if (!ifi.ifi_index)
970                 return -1;
971 
972         nlm = nlmsg_alloc_simple(add ? RTM_SETLINK : RTM_DELLINK, NLM_F_REQUEST);
973         if (!nlm)
974                 return -1;
975 
976         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
977 
978         if (vflags & BRVLAN_F_SELF)
979                 flags |= BRIDGE_FLAGS_SELF;
980 
981         if (vflags & BRVLAN_F_PVID)
982                 vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
983 
984         if (vflags & BRVLAN_F_UNTAGGED)
985                 vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
986 
987         afspec = nla_nest_start(nlm, IFLA_AF_SPEC);
988         if (!afspec) {
989                 ret = -ENOMEM;
990                 goto failure;
991         }
992 
993         if (flags)
994                 nla_put_u16(nlm, IFLA_BRIDGE_FLAGS, flags);
995 
996         nla_put(nlm, IFLA_BRIDGE_VLAN_INFO, sizeof(vinfo), &vinfo);
997         nla_nest_end(nlm, afspec);
998 
999         return system_rtnl_call(nlm);
1000 
1001 failure:
1002         nlmsg_free(nlm);
1003         return ret;
1004 }
1005 
1006 int system_bonding_set_device(struct device *dev, struct bonding_config *cfg)
1007 {
1008         const char *ifname = dev->ifname;
1009         struct blob_attr *cur;
1010         char op = cfg ? '+' : '-';
1011         char buf[64];
1012         int rem;
1013 
1014         snprintf(dev_buf, sizeof(dev_buf), "%s/class/net/bonding_masters", sysfs_path);
1015         snprintf(buf, sizeof(buf), "%c%s", op, ifname);
1016         write_file(dev_buf, buf);
1017 
1018         if (!cfg)
1019                 return 0;
1020 
1021         system_set_dev_sysfs("bonding/mode", ifname, bonding_policy_str[cfg->policy]);
1022 
1023         system_set_dev_sysfs_int("bonding/all_ports_active", ifname, cfg->all_ports_active);
1024 
1025         if (cfg->policy == BONDING_MODE_BALANCE_XOR ||
1026             cfg->policy == BONDING_MODE_BALANCE_TLB ||
1027             cfg->policy == BONDING_MODE_8023AD)
1028                 system_set_dev_sysfs("bonding/xmit_hash_policy", ifname, cfg->xmit_hash_policy);
1029 
1030         if (cfg->policy == BONDING_MODE_8023AD) {
1031                 system_set_dev_sysfs("bonding/ad_actor_system", ifname, cfg->ad_actor_system);
1032                 system_set_dev_sysfs_int("bonding/ad_actor_sys_prio", ifname, cfg->ad_actor_sys_prio);
1033                 system_set_dev_sysfs("bonding/ad_select", ifname, cfg->ad_select);
1034                 system_set_dev_sysfs("bonding/lacp_rate", ifname, cfg->lacp_rate);
1035                 system_set_dev_sysfs_int("bonding/min_links", ifname, cfg->min_links);
1036         }
1037 
1038         if (cfg->policy == BONDING_MODE_BALANCE_RR)
1039                 system_set_dev_sysfs_int("bonding/packets_per_slave", ifname, cfg->packets_per_port);
1040 
1041         if (cfg->policy == BONDING_MODE_BALANCE_TLB ||
1042             cfg->policy == BONDING_MODE_BALANCE_ALB)
1043                 system_set_dev_sysfs_int("bonding/lp_interval", ifname, cfg->lp_interval);
1044 
1045         if (cfg->policy == BONDING_MODE_BALANCE_TLB)
1046                 system_set_dev_sysfs_int("bonding/tlb_dynamic_lb", ifname, cfg->dynamic_lb);
1047         system_set_dev_sysfs_int("bonding/resend_igmp", ifname, cfg->resend_igmp);
1048         system_set_dev_sysfs_int("bonding/num_grat_arp", ifname, cfg->num_peer_notif);
1049         system_set_dev_sysfs("bonding/primary_reselect", ifname, cfg->primary_reselect);
1050         system_set_dev_sysfs("bonding/fail_over_mac", ifname, cfg->failover_mac);
1051 
1052         system_set_dev_sysfs_int((cfg->monitor_arp ?
1053                                   "bonding/arp_interval" :
1054                                   "bonding/miimon"), ifname, cfg->monitor_interval);
1055 
1056         blobmsg_for_each_attr(cur, cfg->arp_target, rem) {
1057                 snprintf(buf, sizeof(buf), "+%s", blobmsg_get_string(cur));
1058                 system_set_dev_sysfs("bonding/arp_ip_target", ifname, buf);
1059         }
1060 
1061         system_set_dev_sysfs_int("bonding/arp_all_targets", ifname, cfg->arp_all_targets);
1062         if (cfg->policy < BONDING_MODE_8023AD)
1063                 system_set_dev_sysfs("bonding/arp_validate", ifname, cfg->arp_validate);
1064         system_set_dev_sysfs_int("bonding/use_carrier", ifname, cfg->use_carrier);
1065         if (!cfg->monitor_arp && cfg->monitor_interval) {
1066                 system_set_dev_sysfs_int("bonding/updelay", ifname, cfg->updelay);
1067                 system_set_dev_sysfs_int("bonding/downdelay", ifname, cfg->downdelay);
1068         }
1069 
1070         return 0;
1071 }
1072 
1073 int system_bonding_set_port(struct device *dev, struct device *port, bool add, bool primary)
1074 {
1075         const char *port_name = port->ifname;
1076         const char op_ch = add ? '+' : '-';
1077         char buf[IFNAMSIZ + 2];
1078 
1079         snprintf(buf, sizeof(buf), "%c%s", op_ch, port_name);
1080         system_if_down(port);
1081         system_set_dev_sysfs("bonding/slaves", dev->ifname, buf);
1082         system_if_up(port);
1083 
1084         if (primary)
1085                 system_set_dev_sysfs("bonding/primary", dev->ifname,
1086                                      add ? port_name : "");
1087 
1088         return 0;
1089 }
1090 
1091 int system_if_resolve(struct device *dev)
1092 {
1093         struct ifreq ifr;
1094 
1095         memset(&ifr, 0, sizeof(ifr));
1096         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1097         if (!ioctl(sock_ioctl, SIOCGIFINDEX, &ifr))
1098                 return ifr.ifr_ifindex;
1099         else
1100                 return 0;
1101 }
1102 
1103 static int system_if_flags(const char *ifname, unsigned add, unsigned rem)
1104 {
1105         struct ifreq ifr;
1106 
1107         memset(&ifr, 0, sizeof(ifr));
1108         strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
1109         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) < 0)
1110                 return -1;
1111 
1112         ifr.ifr_flags |= add;
1113         ifr.ifr_flags &= ~rem;
1114         return ioctl(sock_ioctl, SIOCSIFFLAGS, &ifr);
1115 }
1116 
1117 struct clear_data {
1118         struct nl_msg *msg;
1119         struct device *dev;
1120         int type;
1121         int size;
1122         int af;
1123 };
1124 
1125 
1126 static bool check_ifaddr(struct nlmsghdr *hdr, int ifindex)
1127 {
1128         struct ifaddrmsg *ifa = NLMSG_DATA(hdr);
1129 
1130         return ifa->ifa_index == ifindex;
1131 }
1132 
1133 static bool check_route(struct nlmsghdr *hdr, int ifindex)
1134 {
1135         struct rtmsg *r = NLMSG_DATA(hdr);
1136         struct nlattr *tb[__RTA_MAX];
1137 
1138         if (r->rtm_protocol == RTPROT_KERNEL &&
1139             r->rtm_family == AF_INET6)
1140                 return false;
1141 
1142         nlmsg_parse(hdr, sizeof(struct rtmsg), tb, __RTA_MAX - 1, NULL);
1143         if (!tb[RTA_OIF])
1144                 return false;
1145 
1146         return *(int *)RTA_DATA(tb[RTA_OIF]) == ifindex;
1147 }
1148 
1149 static bool check_rule(struct nlmsghdr *hdr, int ifindex)
1150 {
1151         return true;
1152 }
1153 
1154 static int cb_clear_event(struct nl_msg *msg, void *arg)
1155 {
1156         struct clear_data *clr = arg;
1157         struct nlmsghdr *hdr = nlmsg_hdr(msg);
1158         bool (*cb)(struct nlmsghdr *, int ifindex);
1159         int type, ret;
1160 
1161         switch(clr->type) {
1162         case RTM_GETADDR:
1163                 type = RTM_DELADDR;
1164                 if (hdr->nlmsg_type != RTM_NEWADDR)
1165                         return NL_SKIP;
1166 
1167                 cb = check_ifaddr;
1168                 break;
1169         case RTM_GETROUTE:
1170                 type = RTM_DELROUTE;
1171                 if (hdr->nlmsg_type != RTM_NEWROUTE)
1172                         return NL_SKIP;
1173 
1174                 cb = check_route;
1175                 break;
1176         case RTM_GETRULE:
1177                 type = RTM_DELRULE;
1178                 if (hdr->nlmsg_type != RTM_NEWRULE)
1179                         return NL_SKIP;
1180 
1181                 cb = check_rule;
1182                 break;
1183         default:
1184                 return NL_SKIP;
1185         }
1186 
1187         if (!cb(hdr, clr->dev ? clr->dev->ifindex : 0))
1188                 return NL_SKIP;
1189 
1190         if (type == RTM_DELRULE)
1191                 D(SYSTEM, "Remove a rule\n");
1192         else
1193                 D(SYSTEM, "Remove %s from device %s\n",
1194                   type == RTM_DELADDR ? "an address" : "a route",
1195                   clr->dev->ifname);
1196 
1197         memcpy(nlmsg_hdr(clr->msg), hdr, hdr->nlmsg_len);
1198         hdr = nlmsg_hdr(clr->msg);
1199         hdr->nlmsg_type = type;
1200         hdr->nlmsg_flags = NLM_F_REQUEST;
1201 
1202         nl_socket_disable_auto_ack(sock_rtnl);
1203         ret = nl_send_auto_complete(sock_rtnl, clr->msg);
1204         if (ret < 0) {
1205                 if (type == RTM_DELRULE)
1206                         D(SYSTEM, "Error deleting a rule: %d\n", ret);
1207                 else
1208                         D(SYSTEM, "Error deleting %s from device '%s': %d\n",
1209                                 type == RTM_DELADDR ? "an address" : "a route",
1210                                 clr->dev->ifname, ret);
1211         }
1212 
1213         nl_socket_enable_auto_ack(sock_rtnl);
1214 
1215         return NL_SKIP;
1216 }
1217 
1218 static int
1219 cb_finish_event(struct nl_msg *msg, void *arg)
1220 {
1221         int *pending = arg;
1222         *pending = 0;
1223         return NL_STOP;
1224 }
1225 
1226 static int
1227 error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
1228 {
1229         int *pending = arg;
1230         *pending = err->error;
1231         return NL_STOP;
1232 }
1233 
1234 static void
1235 system_if_clear_entries(struct device *dev, int type, int af)
1236 {
1237         struct clear_data clr;
1238         struct nl_cb *cb;
1239         struct rtmsg rtm = {
1240                 .rtm_family = af,
1241                 .rtm_flags = RTM_F_CLONED,
1242         };
1243         int flags = NLM_F_DUMP;
1244         int pending = 1;
1245 
1246         clr.af = af;
1247         clr.dev = dev;
1248         clr.type = type;
1249         switch (type) {
1250         case RTM_GETADDR:
1251         case RTM_GETRULE:
1252                 clr.size = sizeof(struct rtgenmsg);
1253                 break;
1254         case RTM_GETROUTE:
1255                 clr.size = sizeof(struct rtmsg);
1256                 break;
1257         default:
1258                 return;
1259         }
1260 
1261         cb = nl_cb_alloc(NL_CB_DEFAULT);
1262         if (!cb)
1263                 return;
1264 
1265         clr.msg = nlmsg_alloc_simple(type, flags);
1266         if (!clr.msg)
1267                 goto out;
1268 
1269         nlmsg_append(clr.msg, &rtm, clr.size, 0);
1270         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_clear_event, &clr);
1271         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, cb_finish_event, &pending);
1272         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &pending);
1273 
1274         if (nl_send_auto_complete(sock_rtnl, clr.msg) < 0)
1275                 goto free;
1276 
1277         while (pending > 0)
1278                 nl_recvmsgs(sock_rtnl, cb);
1279 
1280 free:
1281         nlmsg_free(clr.msg);
1282 out:
1283         nl_cb_put(cb);
1284 }
1285 
1286 /*
1287  * Clear bridge (membership) state and bring down device
1288  */
1289 void system_if_clear_state(struct device *dev)
1290 {
1291         static char buf[256];
1292         char *bridge;
1293         device_set_ifindex(dev, system_if_resolve(dev));
1294 
1295         if (dev->external || !dev->ifindex)
1296                 return;
1297 
1298         system_if_flags(dev->ifname, 0, IFF_UP);
1299 
1300         if (system_is_bridge(dev->ifname)) {
1301                 D(SYSTEM, "Delete existing bridge named '%s'\n", dev->ifname);
1302                 system_bridge_delbr(dev);
1303                 return;
1304         }
1305 
1306         bridge = system_get_bridge(dev->ifname, buf, sizeof(buf));
1307         if (bridge) {
1308                 D(SYSTEM, "Remove device '%s' from bridge '%s'\n", dev->ifname, bridge);
1309                 system_bridge_if(bridge, dev, SIOCBRDELIF, NULL);
1310         }
1311 
1312         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET);
1313         system_if_clear_entries(dev, RTM_GETADDR, AF_INET);
1314         system_if_clear_entries(dev, RTM_GETROUTE, AF_INET6);
1315         system_if_clear_entries(dev, RTM_GETADDR, AF_INET6);
1316         system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET);
1317         system_if_clear_entries(dev, RTM_GETNEIGH, AF_INET6);
1318         system_set_disable_ipv6(dev, "");
1319 }
1320 
1321 static inline unsigned long
1322 sec_to_jiffies(int val)
1323 {
1324         return (unsigned long) val * 100;
1325 }
1326 
1327 static void system_bridge_conf_multicast_deps(struct device *bridge,
1328                                               struct bridge_config *cfg,
1329                                               char *buf,
1330                                               int buf_len)
1331 {
1332         int val;
1333 
1334         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS ||
1335             cfg->flags & BRIDGE_OPT_QUERY_INTERVAL ||
1336             cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1337                 val = cfg->robustness * cfg->query_interval +
1338                         cfg->query_response_interval;
1339 
1340                 snprintf(buf, buf_len, "%i", val);
1341                 system_bridge_set_membership_interval(bridge, buf);
1342 
1343                 val = cfg->robustness * cfg->query_interval +
1344                         cfg->query_response_interval / 2;
1345 
1346                 snprintf(buf, buf_len, "%i", val);
1347                 system_bridge_set_other_querier_timeout(bridge, buf);
1348         }
1349 
1350         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1351                 val = cfg->query_interval / 4;
1352 
1353                 snprintf(buf, buf_len, "%i", val);
1354                 system_bridge_set_startup_query_interval(bridge, buf);
1355         }
1356 }
1357 
1358 static void system_bridge_conf_multicast(struct device *bridge,
1359                                          struct bridge_config *cfg,
1360                                          char *buf,
1361                                          int buf_len)
1362 {
1363         system_set_dev_sysfs("bridge/multicast_snooping",
1364                 bridge->ifname, cfg->igmp_snoop ? "1" : "");
1365 
1366         system_set_dev_sysfs("bridge/multicast_querier",
1367                 bridge->ifname, cfg->multicast_querier ? "1" : "");
1368 
1369         snprintf(buf, buf_len, "%i", cfg->hash_max);
1370         system_set_dev_sysfs("/bridge/hash_max",
1371                 bridge->ifname, buf);
1372 
1373         if (bridge->settings.flags & DEV_OPT_MULTICAST_ROUTER) {
1374                 snprintf(buf, buf_len, "%u", bridge->settings.multicast_router);
1375                 system_bridge_set_multicast_router(bridge, buf, true);
1376         }
1377 
1378         if (cfg->flags & BRIDGE_OPT_ROBUSTNESS) {
1379                 snprintf(buf, buf_len, "%i", cfg->robustness);
1380                 system_bridge_set_robustness(bridge, buf);
1381         }
1382 
1383         if (cfg->flags & BRIDGE_OPT_QUERY_INTERVAL) {
1384                 snprintf(buf, buf_len, "%i", cfg->query_interval);
1385                 system_bridge_set_query_interval(bridge, buf);
1386         }
1387 
1388         if (cfg->flags & BRIDGE_OPT_QUERY_RESPONSE_INTERVAL) {
1389                 snprintf(buf, buf_len, "%i", cfg->query_response_interval);
1390                 system_bridge_set_query_response_interval(bridge, buf);
1391         }
1392 
1393         if (cfg->flags & BRIDGE_OPT_LAST_MEMBER_INTERVAL) {
1394                 snprintf(buf, buf_len, "%i", cfg->last_member_interval);
1395                 system_bridge_set_last_member_interval(bridge, buf);
1396         }
1397 
1398         system_bridge_conf_multicast_deps(bridge, cfg, buf, buf_len);
1399 }
1400 
1401 int system_bridge_addbr(struct device *bridge, struct bridge_config *cfg)
1402 {
1403         char buf[64];
1404 
1405         if (ioctl(sock_ioctl, SIOCBRADDBR, bridge->ifname) < 0)
1406                 return -1;
1407 
1408         system_bridge_set_stp_state(bridge, cfg->stp);
1409 
1410         snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->forward_delay));
1411         system_bridge_set_forward_delay(bridge, buf);
1412 
1413         system_bridge_conf_multicast(bridge, cfg, buf, sizeof(buf));
1414         system_bridge_set_vlan_filtering(bridge, cfg->vlan_filtering ? "1" : "");
1415 
1416         snprintf(buf, sizeof(buf), "%d", cfg->priority);
1417         system_bridge_set_priority(bridge, buf);
1418 
1419         snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->hello_time));
1420         system_bridge_set_hello_time(bridge, buf);
1421 
1422         snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->max_age));
1423         system_bridge_set_max_age(bridge, buf);
1424 
1425         if (cfg->flags & BRIDGE_OPT_AGEING_TIME) {
1426                 snprintf(buf, sizeof(buf), "%lu", sec_to_jiffies(cfg->ageing_time));
1427                 system_bridge_set_ageing_time(bridge, buf);
1428         }
1429 
1430         return 0;
1431 }
1432 
1433 int system_macvlan_add(struct device *macvlan, struct device *dev, struct macvlan_config *cfg)
1434 {
1435         struct nl_msg *msg;
1436         struct nlattr *linkinfo, *data;
1437         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
1438         int i, rv;
1439         static const struct {
1440                 const char *name;
1441                 enum macvlan_mode val;
1442         } modes[] = {
1443                 { "private", MACVLAN_MODE_PRIVATE },
1444                 { "vepa", MACVLAN_MODE_VEPA },
1445                 { "bridge", MACVLAN_MODE_BRIDGE },
1446                 { "passthru", MACVLAN_MODE_PASSTHRU },
1447         };
1448 
1449         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1450 
1451         if (!msg)
1452                 return -1;
1453 
1454         nlmsg_append(msg, &iim, sizeof(iim), 0);
1455 
1456         if (cfg->flags & MACVLAN_OPT_MACADDR)
1457                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1458         nla_put_string(msg, IFLA_IFNAME, macvlan->ifname);
1459         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1460 
1461         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1462                 goto nla_put_failure;
1463 
1464         nla_put_string(msg, IFLA_INFO_KIND, "macvlan");
1465 
1466         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1467                 goto nla_put_failure;
1468 
1469         if (cfg->mode) {
1470                 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1471                         if (strcmp(cfg->mode, modes[i].name) != 0)
1472                                 continue;
1473 
1474                         nla_put_u32(msg, IFLA_MACVLAN_MODE, modes[i].val);
1475                         break;
1476                 }
1477         }
1478 
1479         nla_nest_end(msg, data);
1480         nla_nest_end(msg, linkinfo);
1481 
1482         rv = system_rtnl_call(msg);
1483         if (rv)
1484                 D(SYSTEM, "Error adding macvlan '%s' over '%s': %d\n", macvlan->ifname, dev->ifname, rv);
1485 
1486         return rv;
1487 
1488 nla_put_failure:
1489         nlmsg_free(msg);
1490         return -ENOMEM;
1491 }
1492 
1493 int system_link_netns_move(struct device *dev, int netns_fd, const char *target_ifname)
1494 {
1495         struct nl_msg *msg;
1496         struct ifinfomsg iim = {
1497                 .ifi_family = AF_UNSPEC,
1498         };
1499 
1500         if (!dev)
1501                 return -1;
1502 
1503         iim.ifi_index = system_if_resolve(dev);
1504         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST);
1505 
1506         if (!msg)
1507                 return -1;
1508 
1509         nlmsg_append(msg, &iim, sizeof(iim), 0);
1510         if (target_ifname)
1511                 nla_put_string(msg, IFLA_IFNAME, target_ifname);
1512 
1513         nla_put_u32(msg, IFLA_NET_NS_FD, netns_fd);
1514         return system_rtnl_call(msg);
1515 }
1516 
1517 static int system_link_del(const char *ifname)
1518 {
1519         struct nl_msg *msg;
1520         struct ifinfomsg iim = {
1521                 .ifi_family = AF_UNSPEC,
1522                 .ifi_index = 0,
1523         };
1524 
1525         msg = nlmsg_alloc_simple(RTM_DELLINK, NLM_F_REQUEST);
1526 
1527         if (!msg)
1528                 return -1;
1529 
1530         nlmsg_append(msg, &iim, sizeof(iim), 0);
1531         nla_put_string(msg, IFLA_IFNAME, ifname);
1532         return system_rtnl_call(msg);
1533 }
1534 
1535 int system_macvlan_del(struct device *macvlan)
1536 {
1537         return system_link_del(macvlan->ifname);
1538 }
1539 
1540 int system_netns_open(const pid_t target_ns)
1541 {
1542         char pid_net_path[PATH_MAX];
1543 
1544         snprintf(pid_net_path, sizeof(pid_net_path), "/proc/%u/ns/net", target_ns);
1545 
1546         return open(pid_net_path, O_RDONLY);
1547 }
1548 
1549 int system_netns_set(int netns_fd)
1550 {
1551         return setns(netns_fd, CLONE_NEWNET);
1552 }
1553 
1554 int system_veth_add(struct device *veth, struct veth_config *cfg)
1555 {
1556         struct nl_msg *msg;
1557         struct ifinfomsg empty_iim = {};
1558         struct nlattr *linkinfo, *data, *veth_info;
1559         int rv;
1560 
1561         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1562 
1563         if (!msg)
1564                 return -1;
1565 
1566         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1567 
1568         if (cfg->flags & VETH_OPT_MACADDR)
1569                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->macaddr), cfg->macaddr);
1570         nla_put_string(msg, IFLA_IFNAME, veth->ifname);
1571 
1572         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1573                 goto nla_put_failure;
1574 
1575         nla_put_string(msg, IFLA_INFO_KIND, "veth");
1576 
1577         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1578                 goto nla_put_failure;
1579 
1580         if (!(veth_info = nla_nest_start(msg, VETH_INFO_PEER)))
1581                 goto nla_put_failure;
1582 
1583         nlmsg_append(msg, &empty_iim, sizeof(empty_iim), 0);
1584 
1585         if (cfg->flags & VETH_OPT_PEER_NAME)
1586                 nla_put_string(msg, IFLA_IFNAME, cfg->peer_name);
1587         if (cfg->flags & VETH_OPT_PEER_MACADDR)
1588                 nla_put(msg, IFLA_ADDRESS, sizeof(cfg->peer_macaddr), cfg->peer_macaddr);
1589 
1590         nla_nest_end(msg, veth_info);
1591         nla_nest_end(msg, data);
1592         nla_nest_end(msg, linkinfo);
1593 
1594         rv = system_rtnl_call(msg);
1595         if (rv) {
1596                 if (cfg->flags & VETH_OPT_PEER_NAME)
1597                         D(SYSTEM, "Error adding veth '%s' with peer '%s': %d\n", veth->ifname, cfg->peer_name, rv);
1598                 else
1599                         D(SYSTEM, "Error adding veth '%s': %d\n", veth->ifname, rv);
1600         }
1601 
1602         return rv;
1603 
1604 nla_put_failure:
1605         nlmsg_free(msg);
1606         return -ENOMEM;
1607 }
1608 
1609 int system_veth_del(struct device *veth)
1610 {
1611         return system_link_del(veth->ifname);
1612 }
1613 
1614 static int system_vlan(struct device *dev, int id)
1615 {
1616         struct vlan_ioctl_args ifr = {
1617                 .cmd = SET_VLAN_NAME_TYPE_CMD,
1618                 .u.name_type = VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD,
1619         };
1620 
1621         if (ioctl(sock_ioctl, SIOCSIFVLAN, &ifr) < 0)
1622                 return -1;
1623 
1624         if (id < 0) {
1625                 ifr.cmd = DEL_VLAN_CMD;
1626                 ifr.u.VID = 0;
1627         } else {
1628                 ifr.cmd = ADD_VLAN_CMD;
1629                 ifr.u.VID = id;
1630         }
1631         strncpy(ifr.device1, dev->ifname, sizeof(ifr.device1));
1632         return ioctl(sock_ioctl, SIOCSIFVLAN, &ifr);
1633 }
1634 
1635 int system_vlan_add(struct device *dev, int id)
1636 {
1637         return system_vlan(dev, id);
1638 }
1639 
1640 int system_vlan_del(struct device *dev)
1641 {
1642         return system_vlan(dev, -1);
1643 }
1644 
1645 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
1646 {
1647         struct nl_msg *msg;
1648         struct nlattr *linkinfo, *data, *qos;
1649         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
1650         struct vlan_qos_mapping *elem;
1651         struct ifla_vlan_qos_mapping nl_qos_map;
1652         int rv;
1653 
1654         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
1655 
1656         if (!msg)
1657                 return -1;
1658 
1659         nlmsg_append(msg, &iim, sizeof(iim), 0);
1660         nla_put_string(msg, IFLA_IFNAME, vlandev->ifname);
1661         nla_put_u32(msg, IFLA_LINK, dev->ifindex);
1662 
1663         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO)))
1664                 goto nla_put_failure;
1665 
1666         nla_put_string(msg, IFLA_INFO_KIND, "vlan");
1667 
1668         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
1669                 goto nla_put_failure;
1670 
1671         nla_put_u16(msg, IFLA_VLAN_ID, cfg->vid);
1672 
1673 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
1674         nla_put_u16(msg, IFLA_VLAN_PROTOCOL, htons(cfg->proto));
1675 #else
1676         if(cfg->proto == VLAN_PROTO_8021AD)
1677                 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);
1678 #endif
1679 
1680         if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
1681                 goto nla_put_failure;
1682 
1683         vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
1684                 nl_qos_map.from = elem->from;
1685                 nl_qos_map.to = elem->to;
1686                 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1687         }
1688         nla_nest_end(msg, qos);
1689 
1690         if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
1691                 goto nla_put_failure;
1692 
1693         vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
1694                 nl_qos_map.from = elem->from;
1695                 nl_qos_map.to = elem->to;
1696                 nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
1697         }
1698         nla_nest_end(msg, qos);
1699 
1700         nla_nest_end(msg, data);
1701         nla_nest_end(msg, linkinfo);
1702 
1703         rv = system_rtnl_call(msg);
1704         if (rv)
1705                 D(SYSTEM, "Error adding vlandev '%s' over '%s': %d\n", vlandev->ifname, dev->ifname, rv);
1706 
1707         return rv;
1708 
1709 nla_put_failure:
1710         nlmsg_free(msg);
1711         return -ENOMEM;
1712 }
1713 
1714 int system_vlandev_del(struct device *vlandev)
1715 {
1716         return system_link_del(vlandev->ifname);
1717 }
1718 
1719 static void
1720 system_set_ethtool_settings(struct device *dev, struct device_settings *s)
1721 {
1722         struct ethtool_cmd ecmd = {
1723                 .cmd = ETHTOOL_GSET,
1724         };
1725         struct ifreq ifr = {
1726                 .ifr_data = (caddr_t)&ecmd,
1727         };
1728         static const struct {
1729                 int speed;
1730                 uint8_t bit_half;
1731                 uint8_t bit_full;
1732         } speed_mask[] = {
1733                 { 10, ETHTOOL_LINK_MODE_10baseT_Half_BIT, ETHTOOL_LINK_MODE_10baseT_Full_BIT },
1734                 { 100, ETHTOOL_LINK_MODE_100baseT_Half_BIT, ETHTOOL_LINK_MODE_100baseT_Full_BIT },
1735                 { 1000, ETHTOOL_LINK_MODE_1000baseT_Half_BIT, ETHTOOL_LINK_MODE_1000baseT_Full_BIT },
1736         };
1737         uint32_t adv;
1738         int i;
1739 
1740         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1741 
1742         if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) != 0)
1743                 return;
1744 
1745         adv = ecmd.supported;
1746         for (i = 0; i < ARRAY_SIZE(speed_mask); i++) {
1747                 if (s->flags & DEV_OPT_DUPLEX) {
1748                         int bit = s->duplex ? speed_mask[i].bit_half : speed_mask[i].bit_full;
1749                         adv &= ~(1 << bit);
1750                 }
1751 
1752                 if (!(s->flags & DEV_OPT_SPEED) ||
1753                     s->speed == speed_mask[i].speed)
1754                         continue;
1755 
1756                 adv &= ~(1 << speed_mask[i].bit_full);
1757                 adv &= ~(1 << speed_mask[i].bit_half);
1758         }
1759 
1760 
1761         if (ecmd.autoneg && ecmd.advertising == adv)
1762                 return;
1763 
1764         ecmd.autoneg = 1;
1765         ecmd.advertising = adv;
1766         ecmd.cmd = ETHTOOL_SSET;
1767         ioctl(sock_ioctl, SIOCETHTOOL, &ifr);
1768 }
1769 
1770 void
1771 system_if_get_settings(struct device *dev, struct device_settings *s)
1772 {
1773         struct ifreq ifr;
1774         char buf[10];
1775 
1776         memset(&ifr, 0, sizeof(ifr));
1777         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1778 
1779         if (ioctl(sock_ioctl, SIOCGIFMTU, &ifr) == 0) {
1780                 s->mtu = ifr.ifr_mtu;
1781                 s->flags |= DEV_OPT_MTU;
1782         }
1783 
1784         s->mtu6 = system_update_ipv6_mtu(dev, 0);
1785         if (s->mtu6 > 0)
1786                 s->flags |= DEV_OPT_MTU6;
1787 
1788         if (ioctl(sock_ioctl, SIOCGIFTXQLEN, &ifr) == 0) {
1789                 s->txqueuelen = ifr.ifr_qlen;
1790                 s->flags |= DEV_OPT_TXQUEUELEN;
1791         }
1792 
1793         if (ioctl(sock_ioctl, SIOCGIFHWADDR, &ifr) == 0) {
1794                 memcpy(s->macaddr, &ifr.ifr_hwaddr.sa_data, sizeof(s->macaddr));
1795                 s->flags |= DEV_OPT_MACADDR;
1796         }
1797 
1798         if (!system_get_disable_ipv6(dev, buf, sizeof(buf))) {
1799                 s->ipv6 = !strtoul(buf, NULL, 0);
1800                 s->flags |= DEV_OPT_IPV6;
1801         }
1802 
1803         if (!system_get_ip6segmentrouting(dev, buf, sizeof(buf))) {
1804                 s->ip6segmentrouting = strtoul(buf, NULL, 0);
1805                 s->flags |= DEV_OPT_IP6SEGMENTROUTING;
1806         }
1807 
1808         if (ioctl(sock_ioctl, SIOCGIFFLAGS, &ifr) == 0) {
1809                 s->promisc = ifr.ifr_flags & IFF_PROMISC;
1810                 s->flags |= DEV_OPT_PROMISC;
1811 
1812                 s->multicast = ifr.ifr_flags & IFF_MULTICAST;
1813                 s->flags |= DEV_OPT_MULTICAST;
1814         }
1815 
1816         if (!system_get_rpfilter(dev, buf, sizeof(buf))) {
1817                 s->rpfilter = strtoul(buf, NULL, 0);
1818                 s->flags |= DEV_OPT_RPFILTER;
1819         }
1820 
1821         if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
1822                 s->acceptlocal = strtoul(buf, NULL, 0);
1823                 s->flags |= DEV_OPT_ACCEPTLOCAL;
1824         }
1825 
1826         if (!system_get_igmpversion(dev, buf, sizeof(buf))) {
1827                 s->igmpversion = strtoul(buf, NULL, 0);
1828                 s->flags |= DEV_OPT_IGMPVERSION;
1829         }
1830 
1831         if (!system_get_mldversion(dev, buf, sizeof(buf))) {
1832                 s->mldversion = strtoul(buf, NULL, 0);
1833                 s->flags |= DEV_OPT_MLDVERSION;
1834         }
1835 
1836         if (!system_get_neigh4reachabletime(dev, buf, sizeof(buf))) {
1837                 s->neigh4reachabletime = strtoul(buf, NULL, 0);
1838                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1839         }
1840 
1841         if (!system_get_neigh6reachabletime(dev, buf, sizeof(buf))) {
1842                 s->neigh6reachabletime = strtoul(buf, NULL, 0);
1843                 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
1844         }
1845 
1846         if (!system_get_neigh4locktime(dev, buf, sizeof(buf))) {
1847                 s->neigh4locktime = strtol(buf, NULL, 0);
1848                 s->flags |= DEV_OPT_NEIGHLOCKTIME;
1849         }
1850 
1851         if (!system_get_neigh4gcstaletime(dev, buf, sizeof(buf))) {
1852                 s->neigh4gcstaletime = strtoul(buf, NULL, 0);
1853                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1854         }
1855 
1856         if (!system_get_neigh6gcstaletime(dev, buf, sizeof(buf))) {
1857                 s->neigh6gcstaletime = strtoul(buf, NULL, 0);
1858                 s->flags |= DEV_OPT_NEIGHGCSTALETIME;
1859         }
1860 
1861         if (!system_get_dadtransmits(dev, buf, sizeof(buf))) {
1862                 s->dadtransmits = strtoul(buf, NULL, 0);
1863                 s->flags |= DEV_OPT_DADTRANSMITS;
1864         }
1865 
1866         if (!system_get_sendredirects(dev, buf, sizeof(buf))) {
1867                 s->sendredirects = strtoul(buf, NULL, 0);
1868                 s->flags |= DEV_OPT_SENDREDIRECTS;
1869         }
1870 
1871         if (!system_get_drop_v4_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1872                 s->drop_v4_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1873                 s->flags |= DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST;
1874         }
1875 
1876         if (!system_get_drop_v6_unicast_in_l2_multicast(dev, buf, sizeof(buf))) {
1877                 s->drop_v6_unicast_in_l2_multicast = strtoul(buf, NULL, 0);
1878                 s->flags |= DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST;
1879         }
1880 
1881         if (!system_get_drop_gratuitous_arp(dev, buf, sizeof(buf))) {
1882                 s->drop_gratuitous_arp = strtoul(buf, NULL, 0);
1883                 s->flags |= DEV_OPT_DROP_GRATUITOUS_ARP;
1884         }
1885 
1886         if (!system_get_drop_unsolicited_na(dev, buf, sizeof(buf))) {
1887                 s->drop_unsolicited_na = strtoul(buf, NULL, 0);
1888                 s->flags |= DEV_OPT_DROP_UNSOLICITED_NA;
1889         }
1890 
1891         if (!system_get_arp_accept(dev, buf, sizeof(buf))) {
1892                 s->arp_accept = strtoul(buf, NULL, 0);
1893                 s->flags |= DEV_OPT_ARP_ACCEPT;
1894         }
1895 }
1896 
1897 void
1898 system_if_apply_settings(struct device *dev, struct device_settings *s, uint64_t apply_mask)
1899 {
1900         struct ifreq ifr;
1901         char buf[12];
1902 
1903         apply_mask &= s->flags;
1904 
1905         memset(&ifr, 0, sizeof(ifr));
1906         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
1907         if (apply_mask & DEV_OPT_MTU) {
1908                 ifr.ifr_mtu = s->mtu;
1909                 if (ioctl(sock_ioctl, SIOCSIFMTU, &ifr) < 0)
1910                         s->flags &= ~DEV_OPT_MTU;
1911         }
1912         if (apply_mask & DEV_OPT_MTU6) {
1913                 system_update_ipv6_mtu(dev, s->mtu6);
1914         }
1915         if (apply_mask & DEV_OPT_TXQUEUELEN) {
1916                 ifr.ifr_qlen = s->txqueuelen;
1917                 if (ioctl(sock_ioctl, SIOCSIFTXQLEN, &ifr) < 0)
1918                         s->flags &= ~DEV_OPT_TXQUEUELEN;
1919         }
1920         if ((apply_mask & (DEV_OPT_MACADDR | DEV_OPT_DEFAULT_MACADDR)) && !dev->external) {
1921                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1922                 memcpy(&ifr.ifr_hwaddr.sa_data, s->macaddr, sizeof(s->macaddr));
1923                 if (ioctl(sock_ioctl, SIOCSIFHWADDR, &ifr) < 0)
1924                         s->flags &= ~DEV_OPT_MACADDR;
1925         }
1926         if (apply_mask & DEV_OPT_IPV6)
1927                 system_set_disable_ipv6(dev, s->ipv6 ? "" : "1");
1928         if (s->flags & DEV_OPT_IP6SEGMENTROUTING & apply_mask) {
1929                 struct device dummy = {
1930                         .ifname = "all",
1931                 };
1932                 bool ip6segmentrouting = device_check_ip6segmentrouting();
1933 
1934                 system_set_ip6segmentrouting(dev, s->ip6segmentrouting ? "1" : "");
1935                 system_set_ip6segmentrouting(&dummy, ip6segmentrouting ? "1" : "");
1936         }
1937         if (apply_mask & DEV_OPT_PROMISC) {
1938                 if (system_if_flags(dev->ifname, s->promisc ? IFF_PROMISC : 0,
1939                                     !s->promisc ? IFF_PROMISC : 0) < 0)
1940                         s->flags &= ~DEV_OPT_PROMISC;
1941         }
1942         if (apply_mask & DEV_OPT_RPFILTER) {
1943                 snprintf(buf, sizeof(buf), "%u", s->rpfilter);
1944                 system_set_rpfilter(dev, buf);
1945         }
1946         if (apply_mask & DEV_OPT_ACCEPTLOCAL)
1947                 system_set_acceptlocal(dev, s->acceptlocal ? "1" : "");
1948         if (apply_mask & DEV_OPT_IGMPVERSION) {
1949                 snprintf(buf, sizeof(buf), "%u", s->igmpversion);
1950                 system_set_igmpversion(dev, buf);
1951         }
1952         if (apply_mask & DEV_OPT_MLDVERSION) {
1953                 snprintf(buf, sizeof(buf), "%u", s->mldversion);
1954                 system_set_mldversion(dev, buf);
1955         }
1956         if (apply_mask & DEV_OPT_NEIGHREACHABLETIME) {
1957                 snprintf(buf, sizeof(buf), "%u", s->neigh4reachabletime);
1958                 system_set_neigh4reachabletime(dev, buf);
1959                 snprintf(buf, sizeof(buf), "%u", s->neigh6reachabletime);
1960                 system_set_neigh6reachabletime(dev, buf);
1961         }
1962         if (apply_mask & DEV_OPT_NEIGHLOCKTIME) {
1963                 snprintf(buf, sizeof(buf), "%d", s->neigh4locktime);
1964                 system_set_neigh4locktime(dev, buf);
1965         }
1966         if (apply_mask & DEV_OPT_NEIGHGCSTALETIME) {
1967                 snprintf(buf, sizeof(buf), "%u", s->neigh4gcstaletime);
1968                 system_set_neigh4gcstaletime(dev, buf);
1969                 snprintf(buf, sizeof(buf), "%u", s->neigh6gcstaletime);
1970                 system_set_neigh6gcstaletime(dev, buf);
1971         }
1972         if (apply_mask & DEV_OPT_DADTRANSMITS) {
1973                 snprintf(buf, sizeof(buf), "%u", s->dadtransmits);
1974                 system_set_dadtransmits(dev, buf);
1975         }
1976         if (apply_mask & DEV_OPT_MULTICAST) {
1977                 if (system_if_flags(dev->ifname, s->multicast ? IFF_MULTICAST : 0,
1978                                     !s->multicast ? IFF_MULTICAST : 0) < 0)
1979                         s->flags &= ~DEV_OPT_MULTICAST;
1980         }
1981         if (apply_mask & DEV_OPT_SENDREDIRECTS)
1982                 system_set_sendredirects(dev, s->sendredirects ? "1" : "");
1983         if (apply_mask & DEV_OPT_DROP_V4_UNICAST_IN_L2_MULTICAST)
1984                 system_set_drop_v4_unicast_in_l2_multicast(dev, s->drop_v4_unicast_in_l2_multicast ? "1" : "");
1985         if (apply_mask & DEV_OPT_DROP_V6_UNICAST_IN_L2_MULTICAST)
1986                 system_set_drop_v6_unicast_in_l2_multicast(dev, s->drop_v6_unicast_in_l2_multicast ? "1" : "");
1987         if (apply_mask & DEV_OPT_DROP_GRATUITOUS_ARP)
1988                 system_set_drop_gratuitous_arp(dev, s->drop_gratuitous_arp ? "1" : "");
1989         if (apply_mask & DEV_OPT_DROP_UNSOLICITED_NA)
1990                 system_set_drop_unsolicited_na(dev, s->drop_unsolicited_na ? "1" : "");
1991         if (apply_mask & DEV_OPT_ARP_ACCEPT)
1992                 system_set_arp_accept(dev, s->arp_accept ? "1" : "");
1993         system_set_ethtool_settings(dev, s);
1994 }
1995 
1996 int system_if_up(struct device *dev)
1997 {
1998         return system_if_flags(dev->ifname, IFF_UP, 0);
1999 }
2000 
2001 int system_if_down(struct device *dev)
2002 {
2003         return system_if_flags(dev->ifname, 0, IFF_UP);
2004 }
2005 
2006 struct if_check_data {
2007         struct device *dev;
2008         int pending;
2009         int ret;
2010 };
2011 
2012 #ifndef IFF_LOWER_UP
2013 #define IFF_LOWER_UP    0x10000
2014 #endif
2015 
2016 static int cb_if_check_valid(struct nl_msg *msg, void *arg)
2017 {
2018         struct nlmsghdr *nh = nlmsg_hdr(msg);
2019         struct ifinfomsg *ifi = NLMSG_DATA(nh);
2020         struct if_check_data *chk = (struct if_check_data *)arg;
2021 
2022         if (nh->nlmsg_type != RTM_NEWLINK)
2023                 return NL_SKIP;
2024 
2025         if (chk->dev->type == &simple_device_type)
2026                 device_set_present(chk->dev, ifi->ifi_index > 0 ? true : false);
2027         device_set_link(chk->dev, ifi->ifi_flags & IFF_LOWER_UP ? true : false);
2028 
2029         return NL_OK;
2030 }
2031 
2032 static int cb_if_check_ack(struct nl_msg *msg, void *arg)
2033 {
2034         struct if_check_data *chk = (struct if_check_data *)arg;
2035         chk->pending = 0;
2036         return NL_STOP;
2037 }
2038 
2039 static int cb_if_check_error(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2040 {
2041         struct if_check_data *chk = (struct if_check_data *)arg;
2042 
2043         if (chk->dev->type == &simple_device_type)
2044                 device_set_present(chk->dev, false);
2045         device_set_link(chk->dev, false);
2046         chk->pending = err->error;
2047 
2048         return NL_STOP;
2049 }
2050 
2051 struct bridge_vlan_check_data {
2052         struct device *check_dev;
2053         int ifindex;
2054         int ret;
2055         bool pending;
2056 };
2057 
2058 static void bridge_vlan_check_port(struct bridge_vlan_check_data *data,
2059                                    struct bridge_vlan_port *port,
2060                                    struct bridge_vlan_info *vinfo)
2061 {
2062         uint16_t flags = 0, diff, mask;
2063 
2064         if (port->flags & BRVLAN_F_PVID)
2065                 flags |= BRIDGE_VLAN_INFO_PVID;
2066         if (port->flags & BRVLAN_F_UNTAGGED)
2067                 flags |= BRIDGE_VLAN_INFO_UNTAGGED;
2068 
2069         diff = vinfo->flags ^ flags;
2070         mask = BRVLAN_F_UNTAGGED | (flags & BRIDGE_VLAN_INFO_PVID);
2071         if (diff & mask) {
2072                 data->ret = 1;
2073                 data->pending = false;
2074         }
2075 
2076         port->check = 1;
2077 }
2078 
2079 static void bridge_vlan_check_attr(struct bridge_vlan_check_data *data,
2080                                    struct rtattr *attr)
2081 {
2082         struct bridge_vlan_hotplug_port *port;
2083         struct bridge_vlan_info *vinfo;
2084         struct bridge_vlan *vlan;
2085         struct rtattr *cur;
2086         int rem = RTA_PAYLOAD(attr);
2087         int i;
2088 
2089         for (cur = RTA_DATA(attr); RTA_OK(cur, rem); cur = RTA_NEXT(cur, rem)) {
2090                 if (cur->rta_type != IFLA_BRIDGE_VLAN_INFO)
2091                         continue;
2092 
2093                 vinfo = RTA_DATA(cur);
2094                 vlan = vlist_find(&data->check_dev->vlans, &vinfo->vid, vlan, node);
2095                 if (!vlan) {
2096                         data->ret = 1;
2097                         data->pending = false;
2098                         return;
2099                 }
2100 
2101                 for (i = 0; i < vlan->n_ports; i++)
2102                         if (!vlan->ports[i].check)
2103                                 bridge_vlan_check_port(data, &vlan->ports[i], vinfo);
2104 
2105                 list_for_each_entry(port, &vlan->hotplug_ports, list)
2106                         if (!port->port.check)
2107                                 bridge_vlan_check_port(data, &port->port, vinfo);
2108         }
2109 }
2110 
2111 static int bridge_vlan_check_cb(struct nl_msg *msg, void *arg)
2112 {
2113         struct bridge_vlan_check_data *data = arg;
2114         struct nlmsghdr *nh = nlmsg_hdr(msg);
2115         struct ifinfomsg *ifi = NLMSG_DATA(nh);
2116         struct rtattr *attr;
2117         int rem;
2118 
2119         if (nh->nlmsg_type != RTM_NEWLINK)
2120                 return NL_SKIP;
2121 
2122         if (ifi->ifi_family != AF_BRIDGE)
2123                 return NL_SKIP;
2124 
2125         if (ifi->ifi_index != data->ifindex)
2126                 return NL_SKIP;
2127 
2128         attr = IFLA_RTA(ifi);
2129         rem = nh->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
2130         while (RTA_OK(attr, rem)) {
2131                 if (attr->rta_type == IFLA_AF_SPEC)
2132                         bridge_vlan_check_attr(data, attr);
2133 
2134                 attr = RTA_NEXT(attr, rem);
2135         }
2136 
2137         return NL_SKIP;
2138 }
2139 
2140 static int bridge_vlan_ack_cb(struct nl_msg *msg, void *arg)
2141 {
2142         struct bridge_vlan_check_data *data = arg;
2143         data->pending = false;
2144         return NL_STOP;
2145 }
2146 
2147 static int bridge_vlan_error_cb(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg)
2148 {
2149         struct bridge_vlan_check_data *data = arg;
2150         data->pending = false;
2151         return NL_STOP;
2152 }
2153 
2154 int system_bridge_vlan_check(struct device *dev, char *ifname)
2155 {
2156         struct bridge_vlan_check_data data = {
2157                 .check_dev = dev,
2158                 .ifindex = if_nametoindex(ifname),
2159                 .ret = -1,
2160                 .pending = true,
2161         };
2162         static struct ifinfomsg ifi = {
2163                 .ifi_family = AF_BRIDGE
2164         };
2165         static struct rtattr ext_req = {
2166                 .rta_type = IFLA_EXT_MASK,
2167                 .rta_len = RTA_LENGTH(sizeof(uint32_t)),
2168         };
2169         uint32_t filter = RTEXT_FILTER_BRVLAN;
2170         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2171         struct bridge_vlan *vlan;
2172         struct nl_msg *msg;
2173         int i;
2174 
2175         if (!data.ifindex)
2176                 return 0;
2177 
2178         msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_DUMP);
2179 
2180         if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2181                 nlmsg_append(msg, &ext_req, sizeof(ext_req), NLMSG_ALIGNTO) ||
2182                 nlmsg_append(msg, &filter, sizeof(filter), 0))
2183                 goto free;
2184 
2185         vlist_for_each_element(&dev->vlans, vlan, node) {
2186                 struct bridge_vlan_hotplug_port *port;
2187 
2188                 for (i = 0; i < vlan->n_ports; i++) {
2189                         if (!strcmp(vlan->ports[i].ifname, ifname))
2190                                 vlan->ports[i].check = 0;
2191                         else
2192                                 vlan->ports[i].check = -1;
2193                 }
2194 
2195                 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2196                         if (!strcmp(port->port.ifname, ifname))
2197                                 port->port.check = 0;
2198                         else
2199                                 port->port.check = -1;
2200                 }
2201         }
2202 
2203         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, bridge_vlan_check_cb, &data);
2204         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2205         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, bridge_vlan_ack_cb, &data);
2206         nl_cb_err(cb, NL_CB_CUSTOM, bridge_vlan_error_cb, &data);
2207 
2208         if (nl_send_auto_complete(sock_rtnl, msg) < 0)
2209                 goto free;
2210 
2211         data.ret = 0;
2212         while (data.pending)
2213                 nl_recvmsgs(sock_rtnl, cb);
2214 
2215         vlist_for_each_element(&dev->vlans, vlan, node) {
2216                 struct bridge_vlan_hotplug_port *port;
2217 
2218                 for (i = 0; i < vlan->n_ports; i++) {
2219                         if (!vlan->ports[i].check) {
2220                                 data.ret = 1;
2221                                 break;
2222                         }
2223                 }
2224 
2225                 list_for_each_entry(port, &vlan->hotplug_ports, list) {
2226                         if (!port->port.check) {
2227                                 data.ret = 1;
2228                                 break;
2229                         }
2230                 }
2231         }
2232 
2233         goto out;
2234 
2235 free:
2236         nlmsg_free(msg);
2237 out:
2238         nl_cb_put(cb);
2239         return data.ret;
2240 }
2241 
2242 int system_if_check(struct device *dev)
2243 {
2244         struct nl_cb *cb = nl_cb_alloc(NL_CB_DEFAULT);
2245         struct nl_msg *msg;
2246         struct ifinfomsg ifi = {
2247                 .ifi_family = AF_UNSPEC,
2248                 .ifi_index = 0,
2249         };
2250         struct if_check_data chk = {
2251                 .dev = dev,
2252                 .pending = 1,
2253         };
2254         int ret = 1;
2255 
2256         if (!cb)
2257                 return ret;
2258 
2259         msg = nlmsg_alloc_simple(RTM_GETLINK, 0);
2260         if (!msg)
2261                 goto out;
2262 
2263         if (nlmsg_append(msg, &ifi, sizeof(ifi), 0) ||
2264             nla_put_string(msg, IFLA_IFNAME, dev->ifname))
2265                 goto free;
2266 
2267         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, cb_if_check_valid, &chk);
2268         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, cb_if_check_ack, &chk);
2269         nl_cb_err(cb, NL_CB_CUSTOM, cb_if_check_error, &chk);
2270 
2271         ret = nl_send_auto_complete(sock_rtnl, msg);
2272         if (ret < 0)
2273                 goto free;
2274 
2275         while (chk.pending > 0)
2276                 nl_recvmsgs(sock_rtnl, cb);
2277 
2278         ret = chk.pending;
2279 
2280 free:
2281         nlmsg_free(msg);
2282 out:
2283         nl_cb_put(cb);
2284         return ret;
2285 }
2286 
2287 struct device *
2288 system_if_get_parent(struct device *dev)
2289 {
2290         char buf[64], *devname;
2291         int ifindex, iflink;
2292 
2293         if (system_get_dev_sysfs("iflink", dev->ifname, buf, sizeof(buf)) < 0)
2294                 return NULL;
2295 
2296         iflink = strtoul(buf, NULL, 0);
2297         ifindex = system_if_resolve(dev);
2298         if (!iflink || iflink == ifindex)
2299                 return NULL;
2300 
2301         devname = if_indextoname(iflink, buf);
2302         if (!devname)
2303                 return NULL;
2304 
2305         return device_get(devname, true);
2306 }
2307 
2308 static bool
2309 read_string_file(int dir_fd, const char *file, char *buf, int len)
2310 {
2311         bool ret = false;
2312         char *c;
2313         int fd;
2314 
2315         fd = openat(dir_fd, file, O_RDONLY);
2316         if (fd < 0)
2317                 return false;
2318 
2319 retry:
2320         len = read(fd, buf, len - 1);
2321         if (len < 0) {
2322                 if (errno == EINTR)
2323                         goto retry;
2324         } else if (len > 0) {
2325                         buf[len] = 0;
2326 
2327                         c = strchr(buf, '\n');
2328                         if (c)
2329                                 *c = 0;
2330 
2331                         ret = true;
2332         }
2333 
2334         close(fd);
2335 
2336         return ret;
2337 }
2338 
2339 static bool
2340 read_uint64_file(int dir_fd, const char *file, uint64_t *val)
2341 {
2342         char buf[64];
2343         bool ret = false;
2344 
2345         ret = read_string_file(dir_fd, file, buf, sizeof(buf));
2346         if (ret)
2347                 *val = strtoull(buf, NULL, 0);
2348 
2349         return ret;
2350 }
2351 
2352 /* Assume advertised flags == supported flags */
2353 static const struct {
2354         uint32_t mask;
2355         const char *name;
2356 } ethtool_link_modes[] = {
2357         { ADVERTISED_10baseT_Half, "10baseT-H" },
2358         { ADVERTISED_10baseT_Full, "10baseT-F" },
2359         { ADVERTISED_100baseT_Half, "100baseT-H" },
2360         { ADVERTISED_100baseT_Full, "100baseT-F" },
2361         { ADVERTISED_1000baseT_Half, "1000baseT-H" },
2362         { ADVERTISED_1000baseT_Full, "1000baseT-F" },
2363         { ADVERTISED_1000baseKX_Full, "1000baseKX-F" },
2364         { ADVERTISED_2500baseX_Full, "2500baseX-F" },
2365         { ADVERTISED_10000baseT_Full, "10000baseT-F" },
2366         { ADVERTISED_10000baseKX4_Full, "10000baseKX4-F" },
2367         { ADVERTISED_10000baseKR_Full, "10000baseKR-F" },
2368         { ADVERTISED_20000baseMLD2_Full, "20000baseMLD2-F" },
2369         { ADVERTISED_20000baseKR2_Full, "20000baseKR2-F" },
2370         { ADVERTISED_40000baseKR4_Full, "40000baseKR4-F" },
2371         { ADVERTISED_40000baseCR4_Full, "40000baseCR4-F" },
2372         { ADVERTISED_40000baseSR4_Full, "40000baseSR4-F" },
2373         { ADVERTISED_40000baseLR4_Full, "40000baseLR4-F" },
2374 #ifdef ADVERTISED_56000baseKR4_Full
2375         { ADVERTISED_56000baseKR4_Full, "56000baseKR4-F" },
2376         { ADVERTISED_56000baseCR4_Full, "56000baseCR4-F" },
2377         { ADVERTISED_56000baseSR4_Full, "56000baseSR4-F" },
2378         { ADVERTISED_56000baseLR4_Full, "56000baseLR4-F" },
2379 #endif
2380 };
2381 
2382 static void system_add_link_modes(struct blob_buf *b, __u32 mask)
2383 {
2384         int i;
2385         for (i = 0; i < ARRAY_SIZE(ethtool_link_modes); i++) {
2386                 if (mask & ethtool_link_modes[i].mask)
2387                         blobmsg_add_string(b, NULL, ethtool_link_modes[i].name);
2388         }
2389 }
2390 
2391 bool
2392 system_if_force_external(const char *ifname)
2393 {
2394         struct stat s;
2395 
2396         return stat(dev_sysfs_path(ifname, "phy80211"), &s) == 0;
2397 }
2398 
2399 int
2400 system_if_dump_info(struct device *dev, struct blob_buf *b)
2401 {
2402         struct ethtool_cmd ecmd;
2403         struct ifreq ifr;
2404         char *s;
2405         void *c;
2406 
2407         memset(&ecmd, 0, sizeof(ecmd));
2408         memset(&ifr, 0, sizeof(ifr));
2409         strncpy(ifr.ifr_name, dev->ifname, sizeof(ifr.ifr_name) - 1);
2410         ifr.ifr_data = (caddr_t) &ecmd;
2411         ecmd.cmd = ETHTOOL_GSET;
2412 
2413         if (ioctl(sock_ioctl, SIOCETHTOOL, &ifr) == 0) {
2414                 c = blobmsg_open_array(b, "link-advertising");
2415                 system_add_link_modes(b, ecmd.advertising);
2416                 blobmsg_close_array(b, c);
2417 
2418                 c = blobmsg_open_array(b, "link-partner-advertising");
2419                 system_add_link_modes(b, ecmd.lp_advertising);
2420                 blobmsg_close_array(b, c);
2421 
2422                 c = blobmsg_open_array(b, "link-supported");
2423                 system_add_link_modes(b, ecmd.supported);
2424                 blobmsg_close_array(b, c);
2425 
2426                 s = blobmsg_alloc_string_buffer(b, "speed", 8);
2427                 snprintf(s, 8, "%d%c", ethtool_cmd_speed(&ecmd),
2428                         ecmd.duplex == DUPLEX_HALF ? 'H' : 'F');
2429                 blobmsg_add_string_buffer(b);
2430 
2431                 blobmsg_add_u8(b, "autoneg", !!ecmd.autoneg);
2432         }
2433 
2434         return 0;
2435 }
2436 
2437 int
2438 system_if_dump_stats(struct device *dev, struct blob_buf *b)
2439 {
2440         const char *const counters[] = {
2441                 "collisions",     "rx_frame_errors",   "tx_compressed",
2442                 "multicast",      "rx_length_errors",  "tx_dropped",
2443                 "rx_bytes",       "rx_missed_errors",  "tx_errors",
2444                 "rx_compressed",  "rx_over_errors",    "tx_fifo_errors",
2445                 "rx_crc_errors",  "rx_packets",        "tx_heartbeat_errors",
2446                 "rx_dropped",     "tx_aborted_errors", "tx_packets",
2447                 "rx_errors",      "tx_bytes",          "tx_window_errors",
2448                 "rx_fifo_errors", "tx_carrier_errors",
2449         };
2450         int stats_dir;
2451         int i;
2452         uint64_t val = 0;
2453 
2454         stats_dir = open(dev_sysfs_path(dev->ifname, "statistics"), O_DIRECTORY);
2455         if (stats_dir < 0)
2456                 return -1;
2457 
2458         for (i = 0; i < ARRAY_SIZE(counters); i++)
2459                 if (read_uint64_file(stats_dir, counters[i], &val))
2460                         blobmsg_add_u64(b, counters[i], val);
2461 
2462         close(stats_dir);
2463         return 0;
2464 }
2465 
2466 static int system_addr(struct device *dev, struct device_addr *addr, int cmd)
2467 {
2468         bool v4 = ((addr->flags & DEVADDR_FAMILY) == DEVADDR_INET4);
2469         int alen = v4 ? 4 : 16;
2470         unsigned int flags = 0;
2471         struct ifaddrmsg ifa = {
2472                 .ifa_family = (alen == 4) ? AF_INET : AF_INET6,
2473                 .ifa_prefixlen = addr->mask,
2474                 .ifa_index = dev->ifindex,
2475         };
2476 
2477         struct nl_msg *msg;
2478         if (cmd == RTM_NEWADDR)
2479                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2480 
2481         msg = nlmsg_alloc_simple(cmd, flags);
2482         if (!msg)
2483                 return -1;
2484 
2485         nlmsg_append(msg, &ifa, sizeof(ifa), 0);
2486         nla_put(msg, IFA_LOCAL, alen, &addr->addr);
2487         if (v4) {
2488                 if (addr->broadcast)
2489                         nla_put_u32(msg, IFA_BROADCAST, addr->broadcast);
2490                 if (addr->point_to_point)
2491                         nla_put_u32(msg, IFA_ADDRESS, addr->point_to_point);
2492         } else {
2493                 time_t now = system_get_rtime();
2494                 struct ifa_cacheinfo cinfo = {0xffffffffU, 0xffffffffU, 0, 0};
2495 
2496                 if (addr->preferred_until) {
2497                         int64_t preferred = addr->preferred_until - now;
2498                         if (preferred < 0)
2499                                 preferred = 0;
2500                         else if (preferred > UINT32_MAX)
2501                                 preferred = UINT32_MAX;
2502 
2503                         cinfo.ifa_prefered = preferred;
2504                 }
2505 
2506                 if (addr->valid_until) {
2507                         int64_t valid = addr->valid_until - now;
2508                         if (valid <= 0) {
2509                                 nlmsg_free(msg);
2510                                 return -1;
2511                         }
2512                         else if (valid > UINT32_MAX)
2513                                 valid = UINT32_MAX;
2514 
2515                         cinfo.ifa_valid = valid;
2516                 }
2517 
2518                 nla_put(msg, IFA_CACHEINFO, sizeof(cinfo), &cinfo);
2519 
2520                 if (cmd == RTM_NEWADDR && (addr->flags & DEVADDR_OFFLINK))
2521                         nla_put_u32(msg, IFA_FLAGS, IFA_F_NOPREFIXROUTE);
2522         }
2523 
2524         return system_rtnl_call(msg);
2525 }
2526 
2527 int system_add_address(struct device *dev, struct device_addr *addr)
2528 {
2529         return system_addr(dev, addr, RTM_NEWADDR);
2530 }
2531 
2532 int system_del_address(struct device *dev, struct device_addr *addr)
2533 {
2534         return system_addr(dev, addr, RTM_DELADDR);
2535 }
2536 
2537 static int system_neigh(struct device *dev, struct device_neighbor *neighbor, int cmd)
2538 {
2539         int alen = ((neighbor->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2540         unsigned int flags = 0;
2541         struct ndmsg ndm = {
2542                 .ndm_family = (alen == 4) ? AF_INET : AF_INET6,
2543                 .ndm_ifindex = dev->ifindex,
2544                 .ndm_state = NUD_PERMANENT,
2545                 .ndm_flags = (neighbor->proxy ? NTF_PROXY : 0) | (neighbor->router ? NTF_ROUTER : 0),
2546         };
2547         struct nl_msg *msg;
2548 
2549         if (cmd == RTM_NEWNEIGH)
2550                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2551 
2552         msg = nlmsg_alloc_simple(cmd, flags);
2553 
2554         if (!msg)
2555                 return -1;
2556 
2557         nlmsg_append(msg, &ndm, sizeof(ndm), 0);
2558 
2559         nla_put(msg, NDA_DST, alen, &neighbor->addr);
2560         if (neighbor->flags & DEVNEIGH_MAC)
2561                 nla_put(msg, NDA_LLADDR, sizeof(neighbor->macaddr), &neighbor->macaddr);
2562 
2563 
2564         return system_rtnl_call(msg);
2565 }
2566 
2567 int system_add_neighbor(struct device *dev, struct device_neighbor *neighbor)
2568 {
2569         return system_neigh(dev, neighbor, RTM_NEWNEIGH);
2570 }
2571 
2572 int system_del_neighbor(struct device *dev, struct device_neighbor *neighbor)
2573 {
2574         return system_neigh(dev, neighbor, RTM_DELNEIGH);
2575 }
2576 
2577 static int system_rt(struct device *dev, struct device_route *route, int cmd)
2578 {
2579         int alen = ((route->flags & DEVADDR_FAMILY) == DEVADDR_INET4) ? 4 : 16;
2580         bool have_gw;
2581         unsigned int flags = 0;
2582 
2583         if (alen == 4)
2584                 have_gw = !!route->nexthop.in.s_addr;
2585         else
2586                 have_gw = route->nexthop.in6.s6_addr32[0] ||
2587                         route->nexthop.in6.s6_addr32[1] ||
2588                         route->nexthop.in6.s6_addr32[2] ||
2589                         route->nexthop.in6.s6_addr32[3];
2590 
2591         unsigned int table = (route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))
2592                         ? route->table : RT_TABLE_MAIN;
2593 
2594         struct rtmsg rtm = {
2595                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2596                 .rtm_dst_len = route->mask,
2597                 .rtm_src_len = route->sourcemask,
2598                 .rtm_table = (table < 256) ? table : RT_TABLE_UNSPEC,
2599                 .rtm_protocol = (route->flags & DEVROUTE_PROTO) ? route->proto : RTPROT_STATIC,
2600                 .rtm_scope = RT_SCOPE_NOWHERE,
2601                 .rtm_type = (cmd == RTM_DELROUTE) ? 0: RTN_UNICAST,
2602                 .rtm_flags = (route->flags & DEVROUTE_ONLINK) ? RTNH_F_ONLINK : 0,
2603         };
2604         struct nl_msg *msg;
2605 
2606         if (cmd == RTM_NEWROUTE) {
2607                 flags |= NLM_F_CREATE | NLM_F_REPLACE;
2608 
2609                 if (!dev) { /* Add null-route */
2610                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2611                         rtm.rtm_type = RTN_UNREACHABLE;
2612                 }
2613                 else
2614                         rtm.rtm_scope = (have_gw) ? RT_SCOPE_UNIVERSE : RT_SCOPE_LINK;
2615         }
2616 
2617         if (route->flags & DEVROUTE_TYPE) {
2618                 rtm.rtm_type = route->type;
2619                 if (!(route->flags & (DEVROUTE_TABLE | DEVROUTE_SRCTABLE))) {
2620                         if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_BROADCAST ||
2621                             rtm.rtm_type == RTN_NAT || rtm.rtm_type == RTN_ANYCAST)
2622                                 rtm.rtm_table = RT_TABLE_LOCAL;
2623                 }
2624 
2625                 if (rtm.rtm_type == RTN_LOCAL || rtm.rtm_type == RTN_NAT) {
2626                         rtm.rtm_scope = RT_SCOPE_HOST;
2627                 } else if (rtm.rtm_type == RTN_BROADCAST || rtm.rtm_type == RTN_MULTICAST ||
2628                                 rtm.rtm_type == RTN_ANYCAST) {
2629                         rtm.rtm_scope = RT_SCOPE_LINK;
2630                 } else if (rtm.rtm_type == RTN_BLACKHOLE || rtm.rtm_type == RTN_UNREACHABLE ||
2631                                 rtm.rtm_type == RTN_PROHIBIT || rtm.rtm_type == RTN_FAILED_POLICY ||
2632                                 rtm.rtm_type == RTN_THROW) {
2633                         rtm.rtm_scope = RT_SCOPE_UNIVERSE;
2634                         dev = NULL;
2635                 }
2636         }
2637 
2638         msg = nlmsg_alloc_simple(cmd, flags);
2639         if (!msg)
2640                 return -1;
2641 
2642         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2643 
2644         if (route->mask)
2645                 nla_put(msg, RTA_DST, alen, &route->addr);
2646 
2647         if (route->sourcemask) {
2648                 if (rtm.rtm_family == AF_INET)
2649                         nla_put(msg, RTA_PREFSRC, alen, &route->source);
2650                 else
2651                         nla_put(msg, RTA_SRC, alen, &route->source);
2652         }
2653 
2654         if (route->metric > 0)
2655                 nla_put_u32(msg, RTA_PRIORITY, route->metric);
2656 
2657         if (have_gw)
2658                 nla_put(msg, RTA_GATEWAY, alen, &route->nexthop);
2659 
2660         if (dev)
2661                 nla_put_u32(msg, RTA_OIF, dev->ifindex);
2662 
2663         if (table >= 256)
2664                 nla_put_u32(msg, RTA_TABLE, table);
2665 
2666         if (route->flags & DEVROUTE_MTU) {
2667                 struct nlattr *metrics;
2668 
2669                 if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
2670                         goto nla_put_failure;
2671 
2672                 nla_put_u32(msg, RTAX_MTU, route->mtu);
2673 
2674                 nla_nest_end(msg, metrics);
2675         }
2676 
2677         return system_rtnl_call(msg);
2678 
2679 nla_put_failure:
2680         nlmsg_free(msg);
2681         return -ENOMEM;
2682 }
2683 
2684 int system_add_route(struct device *dev, struct device_route *route)
2685 {
2686         return system_rt(dev, route, RTM_NEWROUTE);
2687 }
2688 
2689 int system_del_route(struct device *dev, struct device_route *route)
2690 {
2691         return system_rt(dev, route, RTM_DELROUTE);
2692 }
2693 
2694 int system_flush_routes(void)
2695 {
2696         const char *names[] = { "ipv4", "ipv6" };
2697         int fd, i;
2698 
2699         for (i = 0; i < ARRAY_SIZE(names); i++) {
2700                 snprintf(dev_buf, sizeof(dev_buf), "%s/sys/net/%s/route/flush", proc_path, names[i]);
2701                 fd = open(dev_buf, O_WRONLY);
2702                 if (fd < 0)
2703                         continue;
2704 
2705                 if (write(fd, "-1", 2)) {}
2706                 close(fd);
2707         }
2708         return 0;
2709 }
2710 
2711 bool system_resolve_rt_type(const char *type, unsigned int *id)
2712 {
2713         return system_rtn_aton(type, id);
2714 }
2715 
2716 bool system_resolve_rt_proto(const char *type, unsigned int *id)
2717 {
2718         FILE *f;
2719         char *e, buf[128];
2720         unsigned int n, proto = 256;
2721         n = strtoul(type, &e, 0);
2722         if (!*e && e != type)
2723                 proto = n;
2724         else if (!strcmp(type, "unspec"))
2725                 proto = RTPROT_UNSPEC;
2726         else if (!strcmp(type, "kernel"))
2727                 proto = RTPROT_KERNEL;
2728         else if (!strcmp(type, "boot"))
2729                 proto = RTPROT_BOOT;
2730         else if (!strcmp(type, "static"))
2731                 proto = RTPROT_STATIC;
2732         else if ((f = fopen("/etc/iproute2/rt_protos", "r")) != NULL) {
2733                 while (fgets(buf, sizeof(buf) - 1, f) != NULL) {
2734                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2735                                 continue;
2736 
2737                         n = strtoul(e, NULL, 10);
2738                         e = strtok(NULL, " \t\n");
2739 
2740                         if (e && !strcmp(e, type)) {
2741                                 proto = n;
2742                                 break;
2743                         }
2744                 }
2745                 fclose(f);
2746         }
2747 
2748         if (proto > 255)
2749                 return false;
2750 
2751         *id = proto;
2752         return true;
2753 }
2754 
2755 bool system_resolve_rt_table(const char *name, unsigned int *id)
2756 {
2757         FILE *f;
2758         char *e, buf[128];
2759         unsigned int n, table = RT_TABLE_UNSPEC;
2760 
2761         /* first try to parse table as number */
2762         if ((n = strtoul(name, &e, 0)) > 0 && !*e)
2763                 table = n;
2764 
2765         /* handle well known aliases */
2766         else if (!strcmp(name, "default"))
2767                 table = RT_TABLE_DEFAULT;
2768         else if (!strcmp(name, "main"))
2769                 table = RT_TABLE_MAIN;
2770         else if (!strcmp(name, "local"))
2771                 table = RT_TABLE_LOCAL;
2772 
2773         /* try to look up name in /etc/iproute2/rt_tables */
2774         else if ((f = fopen("/etc/iproute2/rt_tables", "r")) != NULL)
2775         {
2776                 while (fgets(buf, sizeof(buf) - 1, f) != NULL)
2777                 {
2778                         if ((e = strtok(buf, " \t\n")) == NULL || *e == '#')
2779                                 continue;
2780 
2781                         n = strtoul(e, NULL, 10);
2782                         e = strtok(NULL, " \t\n");
2783 
2784                         if (e && !strcmp(e, name))
2785                         {
2786                                 table = n;
2787                                 break;
2788                         }
2789                 }
2790 
2791                 fclose(f);
2792         }
2793 
2794         if (table == RT_TABLE_UNSPEC)
2795                 return false;
2796 
2797         *id = table;
2798         return true;
2799 }
2800 
2801 bool system_is_default_rt_table(unsigned int id)
2802 {
2803         return (id == RT_TABLE_MAIN);
2804 }
2805 
2806 bool system_resolve_rpfilter(const char *filter, unsigned int *id)
2807 {
2808         char *e;
2809         unsigned int n;
2810 
2811         if (!strcmp(filter, "strict"))
2812                 n = 1;
2813         else if (!strcmp(filter, "loose"))
2814                 n = 2;
2815         else {
2816                 n = strtoul(filter, &e, 0);
2817                 if (*e || e == filter || n > 2)
2818                         return false;
2819         }
2820 
2821         *id = n;
2822         return true;
2823 }
2824 
2825 static int system_iprule(struct iprule *rule, int cmd)
2826 {
2827         int alen = ((rule->flags & IPRULE_FAMILY) == IPRULE_INET4) ? 4 : 16;
2828 
2829         struct nl_msg *msg;
2830         struct rtmsg rtm = {
2831                 .rtm_family = (alen == 4) ? AF_INET : AF_INET6,
2832                 .rtm_protocol = RTPROT_STATIC,
2833                 .rtm_scope = RT_SCOPE_UNIVERSE,
2834                 .rtm_table = RT_TABLE_UNSPEC,
2835                 .rtm_type = RTN_UNSPEC,
2836                 .rtm_flags = 0,
2837         };
2838 
2839         if (cmd == RTM_NEWRULE)
2840                 rtm.rtm_type = RTN_UNICAST;
2841 
2842         if (rule->invert)
2843                 rtm.rtm_flags |= FIB_RULE_INVERT;
2844 
2845         if (rule->flags & IPRULE_SRC)
2846                 rtm.rtm_src_len = rule->src_mask;
2847 
2848         if (rule->flags & IPRULE_DEST)
2849                 rtm.rtm_dst_len = rule->dest_mask;
2850 
2851         if (rule->flags & IPRULE_TOS)
2852                 rtm.rtm_tos = rule->tos;
2853 
2854         if (rule->flags & IPRULE_LOOKUP) {
2855                 if (rule->lookup < 256)
2856                         rtm.rtm_table = rule->lookup;
2857         }
2858 
2859         if (rule->flags & IPRULE_ACTION)
2860                 rtm.rtm_type = rule->action;
2861         else if (rule->flags & IPRULE_GOTO)
2862                 rtm.rtm_type = FR_ACT_GOTO;
2863         else if (!(rule->flags & (IPRULE_LOOKUP | IPRULE_ACTION | IPRULE_GOTO)))
2864                 rtm.rtm_type = FR_ACT_NOP;
2865 
2866         msg = nlmsg_alloc_simple(cmd, NLM_F_REQUEST);
2867 
2868         if (!msg)
2869                 return -1;
2870 
2871         nlmsg_append(msg, &rtm, sizeof(rtm), 0);
2872 
2873         if (rule->flags & IPRULE_IN)
2874                 nla_put(msg, FRA_IFNAME, strlen(rule->in_dev) + 1, rule->in_dev);
2875 
2876         if (rule->flags & IPRULE_OUT)
2877                 nla_put(msg, FRA_OIFNAME, strlen(rule->out_dev) + 1, rule->out_dev);
2878 
2879         if (rule->flags & IPRULE_SRC)
2880                 nla_put(msg, FRA_SRC, alen, &rule->src_addr);
2881 
2882         if (rule->flags & IPRULE_DEST)
2883                 nla_put(msg, FRA_DST, alen, &rule->dest_addr);
2884 
2885         if (rule->flags & IPRULE_PRIORITY)
2886                 nla_put_u32(msg, FRA_PRIORITY, rule->priority);
2887         else if (cmd == RTM_NEWRULE)
2888                 nla_put_u32(msg, FRA_PRIORITY, rule->order);
2889 
2890         if (rule->flags & IPRULE_FWMARK)
2891                 nla_put_u32(msg, FRA_FWMARK, rule->fwmark);
2892 
2893         if (rule->flags & IPRULE_FWMASK)
2894                 nla_put_u32(msg, FRA_FWMASK, rule->fwmask);
2895 
2896         if (rule->flags & IPRULE_LOOKUP) {
2897                 if (rule->lookup >= 256)
2898                         nla_put_u32(msg, FRA_TABLE, rule->lookup);
2899         }
2900 
2901         if (rule->flags & IPRULE_SUP_PREFIXLEN)
2902                 nla_put_u32(msg, FRA_SUPPRESS_PREFIXLEN, rule->sup_prefixlen);
2903 
2904         if (rule->flags & IPRULE_GOTO)
2905                 nla_put_u32(msg, FRA_GOTO, rule->gotoid);
2906 
2907         return system_rtnl_call(msg);
2908 }
2909 
2910 int system_add_iprule(struct iprule *rule)
2911 {
2912         return system_iprule(rule, RTM_NEWRULE);
2913 }
2914 
2915 int system_del_iprule(struct iprule *rule)
2916 {
2917         return system_iprule(rule, RTM_DELRULE);
2918 }
2919 
2920 int system_flush_iprules(void)
2921 {
2922         int rv = 0;
2923         struct iprule rule;
2924 
2925         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET);
2926         system_if_clear_entries(NULL, RTM_GETRULE, AF_INET6);
2927 
2928         memset(&rule, 0, sizeof(rule));
2929 
2930 
2931         rule.flags = IPRULE_INET4 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2932 
2933         rule.priority = 0;
2934         rule.lookup = RT_TABLE_LOCAL;
2935         rv |= system_iprule(&rule, RTM_NEWRULE);
2936 
2937         rule.priority = 32766;
2938         rule.lookup = RT_TABLE_MAIN;
2939         rv |= system_iprule(&rule, RTM_NEWRULE);
2940 
2941         rule.priority = 32767;
2942         rule.lookup = RT_TABLE_DEFAULT;
2943         rv |= system_iprule(&rule, RTM_NEWRULE);
2944 
2945 
2946         rule.flags = IPRULE_INET6 | IPRULE_PRIORITY | IPRULE_LOOKUP;
2947 
2948         rule.priority = 0;
2949         rule.lookup = RT_TABLE_LOCAL;
2950         rv |= system_iprule(&rule, RTM_NEWRULE);
2951 
2952         rule.priority = 32766;
2953         rule.lookup = RT_TABLE_MAIN;
2954         rv |= system_iprule(&rule, RTM_NEWRULE);
2955 
2956         return rv;
2957 }
2958 
2959 bool system_resolve_iprule_action(const char *action, unsigned int *id)
2960 {
2961         return system_rtn_aton(action, id);
2962 }
2963 
2964 time_t system_get_rtime(void)
2965 {
2966         struct timespec ts;
2967         struct timeval tv;
2968 
2969         if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
2970                 return ts.tv_sec;
2971 
2972         if (gettimeofday(&tv, NULL) == 0)
2973                 return tv.tv_sec;
2974 
2975         return 0;
2976 }
2977 
2978 #ifndef IP_DF
2979 #define IP_DF       0x4000
2980 #endif
2981 
2982 static int tunnel_ioctl(const char *name, int cmd, void *p)
2983 {
2984         struct ifreq ifr;
2985 
2986         memset(&ifr, 0, sizeof(ifr));
2987         strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name) - 1);
2988         ifr.ifr_ifru.ifru_data = p;
2989         return ioctl(sock_ioctl, cmd, &ifr);
2990 }
2991 
2992 #ifdef IFLA_IPTUN_MAX
2993 static int system_add_ip6_tunnel(const char *name, const unsigned int link,
2994                                  struct blob_attr **tb)
2995 {
2996         struct nl_msg *nlm = nlmsg_alloc_simple(RTM_NEWLINK,
2997                                 NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
2998         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC };
2999         struct blob_attr *cur;
3000         int ret = 0, ttl = 0;
3001 
3002         if (!nlm)
3003                 return -1;
3004 
3005         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3006         nla_put_string(nlm, IFLA_IFNAME, name);
3007 
3008         if (link)
3009                 nla_put_u32(nlm, IFLA_LINK, link);
3010 
3011         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3012         if (!linkinfo) {
3013                 ret = -ENOMEM;
3014                 goto failure;
3015         }
3016 
3017         nla_put_string(nlm, IFLA_INFO_KIND, "ip6tnl");
3018         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3019         if (!infodata) {
3020                 ret = -ENOMEM;
3021                 goto failure;
3022         }
3023 
3024         if (link)
3025                 nla_put_u32(nlm, IFLA_IPTUN_LINK, link);
3026 
3027         if ((cur = tb[TUNNEL_ATTR_TTL]))
3028                 ttl = blobmsg_get_u32(cur);
3029 
3030         nla_put_u8(nlm, IFLA_IPTUN_PROTO, IPPROTO_IPIP);
3031         nla_put_u8(nlm, IFLA_IPTUN_TTL, (ttl) ? ttl : 64);
3032 
3033         struct in6_addr in6buf;
3034         if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3035                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3036                         ret = -EINVAL;
3037                         goto failure;
3038                 }
3039                 nla_put(nlm, IFLA_IPTUN_LOCAL, sizeof(in6buf), &in6buf);
3040         }
3041 
3042         if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3043                 if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3044                         ret = -EINVAL;
3045                         goto failure;
3046                 }
3047                 nla_put(nlm, IFLA_IPTUN_REMOTE, sizeof(in6buf), &in6buf);
3048         }
3049 
3050         if ((cur = tb[TUNNEL_ATTR_DATA])) {
3051                 struct blob_attr *tb_data[__IPIP6_DATA_ATTR_MAX];
3052                 uint32_t tun_flags = IP6_TNL_F_IGN_ENCAP_LIMIT;
3053 
3054                 blobmsg_parse(ipip6_data_attr_list.params, __IPIP6_DATA_ATTR_MAX, tb_data,
3055                         blobmsg_data(cur), blobmsg_len(cur));
3056 
3057                 if ((cur = tb_data[IPIP6_DATA_ENCAPLIMIT])) {
3058                         char *str = blobmsg_get_string(cur);
3059 
3060                         if (strcmp(str, "ignore")) {
3061                                 char *e;
3062                                 unsigned encap_limit = strtoul(str, &e, 0);
3063 
3064                                 if (e == str || *e || encap_limit > 255) {
3065                                         ret = -EINVAL;
3066                                         goto failure;
3067                                 }
3068 
3069                                 nla_put_u8(nlm, IFLA_IPTUN_ENCAP_LIMIT, encap_limit);
3070                                 tun_flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3071                         }
3072                 }
3073 
3074 #ifdef IFLA_IPTUN_FMR_MAX
3075                 if ((cur = tb_data[IPIP6_DATA_FMRS])) {
3076                         struct blob_attr *rcur;
3077                         unsigned rrem, fmrcnt = 0;
3078                         struct nlattr *fmrs = nla_nest_start(nlm, IFLA_IPTUN_FMRS);
3079 
3080                         if (!fmrs) {
3081                                 ret = -ENOMEM;
3082                                 goto failure;
3083                         }
3084 
3085                         blobmsg_for_each_attr(rcur, cur, rrem) {
3086                                 struct blob_attr *tb_fmr[__FMR_DATA_ATTR_MAX], *tb_cur;
3087                                 struct in6_addr ip6prefix;
3088                                 struct in_addr ip4prefix;
3089                                 unsigned ip4len, ip6len, ealen, offset;
3090 
3091                                 blobmsg_parse(fmr_data_attr_list.params, __FMR_DATA_ATTR_MAX, tb_fmr,
3092                                                 blobmsg_data(rcur), blobmsg_len(rcur));
3093 
3094                                 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX6]) ||
3095                                                 !parse_ip_and_netmask(AF_INET6,
3096                                                         blobmsg_data(tb_cur), &ip6prefix,
3097                                                         &ip6len)) {
3098                                         ret = -EINVAL;
3099                                         goto failure;
3100                                 }
3101 
3102                                 if (!(tb_cur = tb_fmr[FMR_DATA_PREFIX4]) ||
3103                                                 !parse_ip_and_netmask(AF_INET,
3104                                                         blobmsg_data(tb_cur), &ip4prefix,
3105                                                         &ip4len)) {
3106                                         ret = -EINVAL;
3107                                         goto failure;
3108                                 }
3109 
3110                                 if (!(tb_cur = tb_fmr[FMR_DATA_EALEN])) {
3111                                         ret = -EINVAL;
3112                                         goto failure;
3113                                 }
3114                                 ealen = blobmsg_get_u32(tb_cur);
3115 
3116                                 if (!(tb_cur = tb_fmr[FMR_DATA_OFFSET])) {
3117                                         ret = -EINVAL;
3118                                         goto failure;
3119                                 }
3120                                 offset = blobmsg_get_u32(tb_cur);
3121 
3122                                 struct nlattr *rule = nla_nest_start(nlm, ++fmrcnt);
3123                                 if (!rule) {
3124                                         ret = -ENOMEM;
3125                                         goto failure;
3126                                 }
3127 
3128                                 nla_put(nlm, IFLA_IPTUN_FMR_IP6_PREFIX, sizeof(ip6prefix), &ip6prefix);
3129                                 nla_put(nlm, IFLA_IPTUN_FMR_IP4_PREFIX, sizeof(ip4prefix), &ip4prefix);
3130                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP6_PREFIX_LEN, ip6len);
3131                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_IP4_PREFIX_LEN, ip4len);
3132                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_EA_LEN, ealen);
3133                                 nla_put_u8(nlm, IFLA_IPTUN_FMR_OFFSET, offset);
3134 
3135                                 nla_nest_end(nlm, rule);
3136                         }
3137 
3138                         nla_nest_end(nlm, fmrs);
3139                 }
3140 #endif
3141                 if (tun_flags)
3142                         nla_put_u32(nlm, IFLA_IPTUN_FLAGS, tun_flags);
3143         }
3144 
3145         nla_nest_end(nlm, infodata);
3146         nla_nest_end(nlm, linkinfo);
3147 
3148         return system_rtnl_call(nlm);
3149 
3150 failure:
3151         nlmsg_free(nlm);
3152         return ret;
3153 }
3154 #endif
3155 
3156 #ifdef IFLA_IPTUN_MAX
3157 #define IP6_FLOWINFO_TCLASS     htonl(0x0FF00000)
3158 static int system_add_gre_tunnel(const char *name, const char *kind,
3159                                  const unsigned int link, struct blob_attr **tb, bool v6)
3160 {
3161         struct nl_msg *nlm;
3162         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3163         struct blob_attr *cur;
3164         uint32_t ikey = 0, okey = 0, flowinfo = 0, flags6 = IP6_TNL_F_IGN_ENCAP_LIMIT;
3165         uint16_t iflags = 0, oflags = 0;
3166         uint8_t tos = 0;
3167         int ret = 0, ttl = 0;
3168         unsigned encap_limit = 0;
3169 
3170         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3171         if (!nlm)
3172                 return -1;
3173 
3174         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3175         nla_put_string(nlm, IFLA_IFNAME, name);
3176 
3177         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3178         if (!linkinfo) {
3179                 ret = -ENOMEM;
3180                 goto failure;
3181         }
3182 
3183         nla_put_string(nlm, IFLA_INFO_KIND, kind);
3184         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3185         if (!infodata) {
3186                 ret = -ENOMEM;
3187                 goto failure;
3188         }
3189 
3190         if (link)
3191                 nla_put_u32(nlm, IFLA_GRE_LINK, link);
3192 
3193         if ((cur = tb[TUNNEL_ATTR_TTL]))
3194                 ttl = blobmsg_get_u32(cur);
3195 
3196         if ((cur = tb[TUNNEL_ATTR_TOS])) {
3197                 char *str = blobmsg_get_string(cur);
3198                 if (strcmp(str, "inherit")) {
3199                         unsigned uval;
3200 
3201                         if (!system_tos_aton(str, &uval)) {
3202                                 ret = -EINVAL;
3203                                 goto failure;
3204                         }
3205 
3206                         if (v6)
3207                                 flowinfo |= htonl(uval << 20) & IP6_FLOWINFO_TCLASS;
3208                         else
3209                                 tos = uval;
3210                 } else {
3211                         if (v6)
3212                                 flags6 |= IP6_TNL_F_USE_ORIG_TCLASS;
3213                         else
3214                                 tos = 1;
3215                 }
3216         }
3217 
3218         if ((cur = tb[TUNNEL_ATTR_DATA])) {
3219                 struct blob_attr *tb_data[__GRE_DATA_ATTR_MAX];
3220 
3221                 blobmsg_parse(gre_data_attr_list.params, __GRE_DATA_ATTR_MAX, tb_data,
3222                         blobmsg_data(cur), blobmsg_len(cur));
3223 
3224                 if ((cur = tb_data[GRE_DATA_IKEY])) {
3225                         if ((ikey = blobmsg_get_u32(cur)))
3226                                 iflags |= GRE_KEY;
3227                 }
3228 
3229                 if ((cur = tb_data[GRE_DATA_OKEY])) {
3230                         if ((okey = blobmsg_get_u32(cur)))
3231                                 oflags |= GRE_KEY;
3232                 }
3233 
3234                 if ((cur = tb_data[GRE_DATA_ICSUM])) {
3235                         if (blobmsg_get_bool(cur))
3236                                 iflags |= GRE_CSUM;
3237                 }
3238 
3239                 if ((cur = tb_data[GRE_DATA_OCSUM])) {
3240                         if (blobmsg_get_bool(cur))
3241                                 oflags |= GRE_CSUM;
3242                 }
3243 
3244                 if ((cur = tb_data[GRE_DATA_ISEQNO])) {
3245                         if (blobmsg_get_bool(cur))
3246                                 iflags |= GRE_SEQ;
3247                 }
3248 
3249                 if ((cur = tb_data[GRE_DATA_OSEQNO])) {
3250                         if (blobmsg_get_bool(cur))
3251                                 oflags |= GRE_SEQ;
3252                 }
3253 
3254                 if ((cur = tb_data[GRE_DATA_ENCAPLIMIT])) {
3255                         char *str = blobmsg_get_string(cur);
3256 
3257                         if (strcmp(str, "ignore")) {
3258                                 char *e;
3259 
3260                                 encap_limit = strtoul(str, &e, 0);
3261 
3262                                 if (e == str || *e || encap_limit > 255) {
3263                                         ret = -EINVAL;
3264                                         goto failure;
3265                                 }
3266 
3267                                 flags6 &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
3268                         }
3269                 }
3270         }
3271 
3272         if (v6) {
3273                 struct in6_addr in6buf;
3274                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3275                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3276                                 ret = -EINVAL;
3277                                 goto failure;
3278                         }
3279                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(in6buf), &in6buf);
3280                 }
3281 
3282                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3283                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3284                                 ret = -EINVAL;
3285                                 goto failure;
3286                         }
3287                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(in6buf), &in6buf);
3288                 }
3289 
3290                 if (!(flags6 & IP6_TNL_F_IGN_ENCAP_LIMIT))
3291                         nla_put_u8(nlm, IFLA_GRE_ENCAP_LIMIT, encap_limit);
3292 
3293                 if (flowinfo)
3294                         nla_put_u32(nlm, IFLA_GRE_FLOWINFO, flowinfo);
3295 
3296                 if (flags6)
3297                         nla_put_u32(nlm, IFLA_GRE_FLAGS, flags6);
3298 
3299                 if (!ttl)
3300                         ttl = 64;
3301         } else {
3302                 struct in_addr inbuf;
3303                 bool set_df = true;
3304 
3305                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3306                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3307                                 ret = -EINVAL;
3308                                 goto failure;
3309                         }
3310                         nla_put(nlm, IFLA_GRE_LOCAL, sizeof(inbuf), &inbuf);
3311                 }
3312 
3313                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3314                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3315                                 ret = -EINVAL;
3316                                 goto failure;
3317                         }
3318                         nla_put(nlm, IFLA_GRE_REMOTE, sizeof(inbuf), &inbuf);
3319 
3320                         if (IN_MULTICAST(ntohl(inbuf.s_addr))) {
3321                                 if (!okey) {
3322                                         okey = inbuf.s_addr;
3323                                         oflags |= GRE_KEY;
3324                                 }
3325 
3326                                 if (!ikey) {
3327                                         ikey = inbuf.s_addr;
3328                                         iflags |= GRE_KEY;
3329                                 }
3330                         }
3331                 }
3332 
3333                 if ((cur = tb[TUNNEL_ATTR_DF]))
3334                         set_df = blobmsg_get_bool(cur);
3335 
3336                 if (!set_df) {
3337                         /* ttl != 0 and nopmtudisc are incompatible */
3338                         if (ttl) {
3339                                 ret = -EINVAL;
3340                                 goto failure;
3341                         }
3342                 } else if (!ttl)
3343                         ttl = 64;
3344 
3345                 nla_put_u8(nlm, IFLA_GRE_PMTUDISC, set_df ? 1 : 0);
3346 
3347                 nla_put_u8(nlm, IFLA_GRE_TOS, tos);
3348         }
3349 
3350         if (ttl)
3351                 nla_put_u8(nlm, IFLA_GRE_TTL, ttl);
3352 
3353         if (oflags)
3354                 nla_put_u16(nlm, IFLA_GRE_OFLAGS, oflags);
3355 
3356         if (iflags)
3357                 nla_put_u16(nlm, IFLA_GRE_IFLAGS, iflags);
3358 
3359         if (okey)
3360                 nla_put_u32(nlm, IFLA_GRE_OKEY, htonl(okey));
3361 
3362         if (ikey)
3363                 nla_put_u32(nlm, IFLA_GRE_IKEY, htonl(ikey));
3364 
3365         nla_nest_end(nlm, infodata);
3366         nla_nest_end(nlm, linkinfo);
3367 
3368         return system_rtnl_call(nlm);
3369 
3370 failure:
3371         nlmsg_free(nlm);
3372         return ret;
3373 }
3374 #endif
3375 
3376 #ifdef IFLA_VTI_MAX
3377 static int system_add_vti_tunnel(const char *name, const char *kind,
3378                                  const unsigned int link, struct blob_attr **tb, bool v6)
3379 {
3380         struct nl_msg *nlm;
3381         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3382         struct blob_attr *cur;
3383         int ret = 0;
3384 
3385         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3386         if (!nlm)
3387                 return -1;
3388 
3389         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3390         nla_put_string(nlm, IFLA_IFNAME, name);
3391 
3392         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3393         if (!linkinfo) {
3394                 ret = -ENOMEM;
3395                 goto failure;
3396         }
3397 
3398         nla_put_string(nlm, IFLA_INFO_KIND, kind);
3399         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3400         if (!infodata) {
3401                 ret = -ENOMEM;
3402                 goto failure;
3403         }
3404 
3405         if (link)
3406                 nla_put_u32(nlm, IFLA_VTI_LINK, link);
3407 
3408         if (v6) {
3409                 struct in6_addr in6buf;
3410                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3411                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3412                                 ret = -EINVAL;
3413                                 goto failure;
3414                         }
3415                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(in6buf), &in6buf);
3416                 }
3417 
3418                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3419                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3420                                 ret = -EINVAL;
3421                                 goto failure;
3422                         }
3423                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(in6buf), &in6buf);
3424                 }
3425 
3426         } else {
3427                 struct in_addr inbuf;
3428 
3429                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3430                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3431                                 ret = -EINVAL;
3432                                 goto failure;
3433                         }
3434                         nla_put(nlm, IFLA_VTI_LOCAL, sizeof(inbuf), &inbuf);
3435                 }
3436 
3437                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3438                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3439                                 ret = -EINVAL;
3440                                 goto failure;
3441                         }
3442                         nla_put(nlm, IFLA_VTI_REMOTE, sizeof(inbuf), &inbuf);
3443                 }
3444 
3445         }
3446 
3447         if ((cur = tb[TUNNEL_ATTR_DATA])) {
3448                 struct blob_attr *tb_data[__VTI_DATA_ATTR_MAX];
3449                 uint32_t ikey = 0, okey = 0;
3450 
3451                 blobmsg_parse(vti_data_attr_list.params, __VTI_DATA_ATTR_MAX, tb_data,
3452                         blobmsg_data(cur), blobmsg_len(cur));
3453 
3454                 if ((cur = tb_data[VTI_DATA_IKEY])) {
3455                         if ((ikey = blobmsg_get_u32(cur)))
3456                                 nla_put_u32(nlm, IFLA_VTI_IKEY, htonl(ikey));
3457                 }
3458 
3459                 if ((cur = tb_data[VTI_DATA_OKEY])) {
3460                         if ((okey = blobmsg_get_u32(cur)))
3461                                 nla_put_u32(nlm, IFLA_VTI_OKEY, htonl(okey));
3462                 }
3463         }
3464 
3465         nla_nest_end(nlm, infodata);
3466         nla_nest_end(nlm, linkinfo);
3467 
3468         return system_rtnl_call(nlm);
3469 
3470 failure:
3471         nlmsg_free(nlm);
3472         return ret;
3473 }
3474 #endif
3475 
3476 #ifdef IFLA_XFRM_MAX
3477 static int system_add_xfrm_tunnel(const char *name, const char *kind,
3478                                  const unsigned int link, struct blob_attr **tb)
3479 {
3480         struct nl_msg *nlm;
3481         struct ifinfomsg ifi = { .ifi_family = AF_UNSPEC, };
3482         struct blob_attr *cur;
3483         int ret = 0;
3484 
3485         nlm = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_CREATE);
3486         if (!nlm)
3487                 return -1;
3488 
3489         nlmsg_append(nlm, &ifi, sizeof(ifi), 0);
3490         nla_put_string(nlm, IFLA_IFNAME, name);
3491 
3492         struct nlattr *linkinfo = nla_nest_start(nlm, IFLA_LINKINFO);
3493         if (!linkinfo) {
3494                 ret = -ENOMEM;
3495                 goto failure;
3496         }
3497 
3498         nla_put_string(nlm, IFLA_INFO_KIND, kind);
3499         struct nlattr *infodata = nla_nest_start(nlm, IFLA_INFO_DATA);
3500         if (!infodata) {
3501                 ret = -ENOMEM;
3502                 goto failure;
3503         }
3504 
3505         if (link)
3506                 nla_put_u32(nlm, IFLA_XFRM_LINK, link);
3507 
3508         if ((cur = tb[TUNNEL_ATTR_DATA])) {
3509                 struct blob_attr *tb_data[__XFRM_DATA_ATTR_MAX];
3510                 uint32_t if_id = 0;
3511 
3512                 blobmsg_parse(xfrm_data_attr_list.params, __XFRM_DATA_ATTR_MAX, tb_data,
3513                         blobmsg_data(cur), blobmsg_len(cur));
3514 
3515                 if ((cur = tb_data[XFRM_DATA_IF_ID])) {
3516                         if ((if_id = blobmsg_get_u32(cur)))
3517                                 nla_put_u32(nlm, IFLA_XFRM_IF_ID, if_id);
3518                 }
3519 
3520         }
3521 
3522         nla_nest_end(nlm, infodata);
3523         nla_nest_end(nlm, linkinfo);
3524 
3525         return system_rtnl_call(nlm);
3526 
3527 failure:
3528         nlmsg_free(nlm);
3529         return ret;
3530 }
3531 #endif
3532 
3533 #ifdef IFLA_VXLAN_MAX
3534 static void system_vxlan_map_bool_attr(struct nl_msg *msg, struct blob_attr **tb_data, int attrtype, int vxlandatatype, bool invert) {
3535         struct blob_attr *cur;
3536         if ((cur = tb_data[vxlandatatype])) {
3537                 bool val = blobmsg_get_bool(cur);
3538                 if (invert)
3539                         val = !val;
3540 
3541                 if ((attrtype == IFLA_VXLAN_GBP) && val)
3542                         nla_put_flag(msg, attrtype);
3543                 else 
3544                         nla_put_u8(msg, attrtype, val);
3545 
3546         }
3547 }
3548 
3549 static int system_add_vxlan(const char *name, const unsigned int link, struct blob_attr **tb, bool v6)
3550 {
3551         struct blob_attr *tb_data[__VXLAN_DATA_ATTR_MAX];
3552         struct nl_msg *msg;
3553         struct nlattr *linkinfo, *data;
3554         struct ifinfomsg iim = { .ifi_family = AF_UNSPEC, };
3555         struct blob_attr *cur;
3556         int ret = 0;
3557 
3558         if ((cur = tb[TUNNEL_ATTR_DATA]))
3559                 blobmsg_parse(vxlan_data_attr_list.params, __VXLAN_DATA_ATTR_MAX, tb_data,
3560                         blobmsg_data(cur), blobmsg_len(cur));
3561         else
3562                 return -EINVAL;
3563 
3564         msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
3565 
3566         if (!msg)
3567                 return -1;
3568 
3569         nlmsg_append(msg, &iim, sizeof(iim), 0);
3570 
3571         nla_put_string(msg, IFLA_IFNAME, name);
3572 
3573         if ((cur = tb_data[VXLAN_DATA_ATTR_MACADDR])) {
3574                 struct ether_addr *ea = ether_aton(blobmsg_get_string(cur));
3575                 if (!ea) {
3576                         ret = -EINVAL;
3577                         goto failure;
3578                 }
3579 
3580                 nla_put(msg, IFLA_ADDRESS, ETH_ALEN, ea);
3581         }
3582 
3583         if ((cur = tb[TUNNEL_ATTR_MTU])) {
3584                 uint32_t mtu = blobmsg_get_u32(cur);
3585                 nla_put_u32(msg, IFLA_MTU, mtu);
3586         }
3587 
3588         if (!(linkinfo = nla_nest_start(msg, IFLA_LINKINFO))) {
3589                 ret = -ENOMEM;
3590                 goto failure;
3591         }
3592 
3593         nla_put_string(msg, IFLA_INFO_KIND, "vxlan");
3594 
3595         if (!(data = nla_nest_start(msg, IFLA_INFO_DATA))) {
3596                 ret = -ENOMEM;
3597                 goto failure;
3598         }
3599 
3600         if (link)
3601                 nla_put_u32(msg, IFLA_VXLAN_LINK, link);
3602 
3603         if ((cur = tb_data[VXLAN_DATA_ATTR_ID])) {
3604                 uint32_t id = blobmsg_get_u32(cur);
3605                 if (id >= (1u << 24) - 1) {
3606                         ret = -EINVAL;
3607                         goto failure;
3608                 }
3609 
3610                 nla_put_u32(msg, IFLA_VXLAN_ID, id);
3611         }
3612 
3613         if (v6) {
3614                 struct in6_addr in6buf;
3615                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3616                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3617                                 ret = -EINVAL;
3618                                 goto failure;
3619                         }
3620                         nla_put(msg, IFLA_VXLAN_LOCAL6, sizeof(in6buf), &in6buf);
3621                 }
3622 
3623                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3624                         if (inet_pton(AF_INET6, blobmsg_data(cur), &in6buf) < 1) {
3625                                 ret = -EINVAL;
3626                                 goto failure;
3627                         }
3628                         nla_put(msg, IFLA_VXLAN_GROUP6, sizeof(in6buf), &in6buf);
3629                 }
3630         } else {
3631                 struct in_addr inbuf;
3632 
3633                 if ((cur = tb[TUNNEL_ATTR_LOCAL])) {
3634                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3635                                 ret = -EINVAL;
3636                                 goto failure;
3637                         }
3638                         nla_put(msg, IFLA_VXLAN_LOCAL, sizeof(inbuf), &inbuf);
3639                 }
3640 
3641                 if ((cur = tb[TUNNEL_ATTR_REMOTE])) {
3642                         if (inet_pton(AF_INET, blobmsg_data(cur), &inbuf) < 1) {
3643                                 ret = -EINVAL;
3644                                 goto failure;
3645                         }
3646                         nla_put(msg, IFLA_VXLAN_GROUP, sizeof(inbuf), &inbuf);
3647                 }
3648         }
3649 
3650         uint32_t port = 4789;
3651         if ((cur = tb_data[VXLAN_DATA_ATTR_PORT])) {
3652                 port = blobmsg_get_u32(cur);
3653                 if (port < 1 || port > 65535) {
3654                         ret = -EINVAL;
3655                         goto failure;
3656                 }
3657         }
3658         nla_put_u16(msg, IFLA_VXLAN_PORT, htons(port));
3659 
3660         if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMIN])) {
3661                 struct ifla_vxlan_port_range srcports = {0,0};
3662 
3663                 uint32_t low = blobmsg_get_u32(cur);
3664                 if (low < 1 || low > 65535 - 1) {
3665                         ret = -EINVAL;
3666                         goto failure;
3667                 }
3668 
3669                 srcports.low = htons((uint16_t) low);
3670                 srcports.high = htons((uint16_t) (low+1));
3671 
3672                 if ((cur = tb_data[VXLAN_DATA_ATTR_SRCPORTMAX])) {
3673                         uint32_t high = blobmsg_get_u32(cur);
3674                         if (high < 1 || high > 65535) {
3675                                 ret = -EINVAL;
3676                                 goto failure;
3677                         }
3678 
3679                         if (high > low)
3680                                 srcports.high = htons((uint16_t) high);
3681                 }
3682 
3683                 nla_put(msg, IFLA_VXLAN_PORT_RANGE, sizeof(srcports), &srcports);
3684         }
3685 
3686         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_CSUM, VXLAN_DATA_ATTR_TXCSUM, false);
3687         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, VXLAN_DATA_ATTR_RXCSUM, true);
3688         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, VXLAN_DATA_ATTR_TXCSUM, true);
3689         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_LEARNING, VXLAN_DATA_ATTR_LEARNING, false);
3690         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_RSC , VXLAN_DATA_ATTR_RSC, false);
3691         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_PROXY , VXLAN_DATA_ATTR_PROXY, false);
3692         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L2MISS , VXLAN_DATA_ATTR_L2MISS, false);
3693         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_L3MISS , VXLAN_DATA_ATTR_L3MISS, false);
3694         system_vxlan_map_bool_attr(msg, tb_data, IFLA_VXLAN_GBP , VXLAN_DATA_ATTR_GBP, false);
3695 
3696         if ((cur = tb_data[VXLAN_DATA_ATTR_AGEING])) {
3697                 uint32_t ageing = blobmsg_get_u32(cur);
3698                 nla_put_u32(msg, IFLA_VXLAN_AGEING, ageing);
3699         }
3700 
3701         if ((cur = tb_data[VXLAN_DATA_ATTR_LIMIT])) {
3702                 uint32_t maxaddress = blobmsg_get_u32(cur);
3703                 nla_put_u32(msg, IFLA_VXLAN_LIMIT, maxaddress);
3704         }
3705 
3706         if ((cur = tb[TUNNEL_ATTR_TOS])) {
3707                 char *str = blobmsg_get_string(cur);
3708                 unsigned tos = 1;
3709 
3710                 if (strcmp(str, "inherit")) {
3711                         if (!system_tos_aton(str, &tos)) {
3712                                 ret = -EINVAL;
3713                                 goto failure;
3714                         }
3715                 }
3716 
3717                 nla_put_u8(msg, IFLA_VXLAN_TOS, tos);
3718         }
3719 
3720         if ((cur = tb[TUNNEL_ATTR_TTL])) {
3721                 uint32_t ttl = blobmsg_get_u32(cur);
3722                 if (ttl < 1 || ttl > 255) {
3723                         ret = -EINVAL;
3724                         goto failure;
3725                 }
3726 
3727                 nla_put_u8(msg, IFLA_VXLAN_TTL, ttl);
3728         }
3729 
3730         nla_nest_end(msg, data);
3731         nla_nest_end(msg, linkinfo);
3732 
3733         ret = system_rtnl_call(msg);
3734         if (ret)
3735                 D(SYSTEM, "Error adding vxlan '%s': %d\n", name, ret);
3736 
3737         return ret;
3738 
3739 failure:
3740         nlmsg_free(msg);
3741         return ret;
3742 }
3743 #endif
3744 
3745 static int system_add_sit_tunnel(const char *name, const unsigned int link, struct blob_attr **tb)
3746 {
3747         struct blob_attr *cur;
3748         int ret = 0;
3749 
3750         if (system_add_proto_tunnel(name, IPPROTO_IPV6, link, tb) < 0)
3751                 return -1;
3752 
3753 #ifdef SIOCADD6RD
3754         if ((cur = tb[TUNNEL_ATTR_DATA])) {
3755                 struct blob_attr *tb_data[__SIXRD_DATA_ATTR_MAX];
3756                 unsigned int mask;
3757                 struct ip_tunnel_6rd p6;
3758 
3759                 blobmsg_parse(sixrd_data_attr_list.params, __SIXRD_DATA_ATTR_MAX, tb_data,
3760                         blobmsg_data(cur), blobmsg_len(cur));
3761 
3762                 memset(&p6, 0, sizeof(p6));
3763 
3764                 if ((cur = tb_data[SIXRD_DATA_PREFIX])) {
3765                         if (!parse_ip_and_netmask(AF_INET6, blobmsg_data(cur),
3766                                                 &p6.prefix, &mask) || mask > 128) {
3767                                 ret = -EINVAL;
3768                                 goto failure;
3769                         }
3770 
3771                         p6.prefixlen = mask;
3772                 }
3773 
3774                 if ((cur = tb_data[SIXRD_DATA_RELAY_PREFIX])) {
3775                         if (!parse_ip_and_netmask(AF_INET, blobmsg_data(cur),
3776                                                 &p6.relay_prefix, &mask) || mask > 32) {
3777                                 ret = -EINVAL;
3778                                 goto failure;
3779                         }
3780 
3781                         p6.relay_prefixlen = mask;
3782                 }
3783 
3784                 if (tunnel_ioctl(name, SIOCADD6RD, &p6) < 0) {
3785                         ret = -1;
3786                         goto failure;
3787                 }
3788         }
3789 #endif
3790 
3791         return ret;
3792 
3793 failure:
3794         __system_del_ip_tunnel(name, tb);
3795         return ret;
3796 }
3797 
3798 static int system_add_proto_tunnel(const char *name, const uint8_t proto, const unsigned int link, struct blob_attr **tb)
3799 {
3800         struct blob_attr *cur;
3801         bool set_df = true;
3802         struct ip_tunnel_parm p  = {
3803                 .link = link,
3804                 .iph = {
3805                         .version = 4,
3806                         .ihl = 5,
3807                         .protocol = proto,
3808                 }
3809         };
3810 
3811         if ((cur = tb[TUNNEL_ATTR_LOCAL]) &&
3812                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.saddr) < 1)
3813                 return -EINVAL;
3814 
3815         if ((cur = tb[TUNNEL_ATTR_REMOTE]) &&
3816                         inet_pton(AF_INET, blobmsg_data(cur), &p.iph.daddr) < 1)
3817                 return -EINVAL;
3818 
3819         if ((cur = tb[TUNNEL_ATTR_DF]))
3820                 set_df = blobmsg_get_bool(cur);
3821 
3822         if ((cur = tb[TUNNEL_ATTR_TTL]))
3823                 p.iph.ttl = blobmsg_get_u32(cur);
3824 
3825         if ((cur = tb[TUNNEL_ATTR_TOS])) {
3826                 char *str = blobmsg_get_string(cur);
3827                 if (strcmp(str, "inherit")) {
3828                         unsigned uval;
3829 
3830                         if (!system_tos_aton(str, &uval))
3831                                 return -EINVAL;
3832 
3833                         p.iph.tos = uval;
3834                 } else
3835                         p.iph.tos = 1;
3836         }
3837 
3838         p.iph.frag_off = set_df ? htons(IP_DF) : 0;
3839         /* ttl !=0 and nopmtudisc are incompatible */
3840         if (p.iph.ttl && p.iph.frag_off == 0)
3841                 return -EINVAL;
3842 
3843         strncpy(p.name, name, sizeof(p.name) - 1);
3844 
3845         switch (p.iph.protocol) {
3846         case IPPROTO_IPIP:
3847                 return tunnel_ioctl("tunl0", SIOCADDTUNNEL, &p);
3848         case IPPROTO_IPV6:
3849                 return tunnel_ioctl("sit0", SIOCADDTUNNEL, &p);
3850         default:
3851                 break;
3852         }
3853         return -1;
3854 }
3855 
3856 static int __system_del_ip_tunnel(const char *name, struct blob_attr **tb)
3857 {
3858         struct blob_attr *cur;
3859         const char *str;
3860 
3861         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3862                 return -EINVAL;
3863         str = blobmsg_data(cur);
3864 
3865         if (!strcmp(str, "greip") || !strcmp(str, "gretapip") ||
3866             !strcmp(str, "greip6") || !strcmp(str, "gretapip6") ||
3867             !strcmp(str, "vtiip") || !strcmp(str, "vtiip6") ||
3868             !strcmp(str, "vxlan") || !strcmp(str, "vxlan6") ||
3869             !strcmp(str, "xfrm"))
3870                 return system_link_del(name);
3871         else
3872                 return tunnel_ioctl(name, SIOCDELTUNNEL, NULL);
3873 }
3874 
3875 int system_del_ip_tunnel(const char *name, struct blob_attr *attr)
3876 {
3877         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3878 
3879         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3880                 blob_data(attr), blob_len(attr));
3881 
3882         return __system_del_ip_tunnel(name, tb);
3883 }
3884 
3885 int system_update_ipv6_mtu(struct device *dev, int mtu)
3886 {
3887         int ret = -1;
3888         char buf[64];
3889         int fd;
3890 
3891         fd = open(dev_sysctl_path("ipv6/conf", dev->ifname, "mtu"), O_RDWR);
3892         if (fd < 0)
3893                 return ret;
3894 
3895         if (!mtu) {
3896                 ssize_t len = read(fd, buf, sizeof(buf) - 1);
3897                 if (len < 0)
3898                         goto out;
3899 
3900                 buf[len] = 0;
3901                 ret = atoi(buf);
3902         } else {
3903                 if (write(fd, buf, snprintf(buf, sizeof(buf), "%i", mtu)) > 0)
3904                         ret = mtu;
3905         }
3906 
3907 out:
3908         close(fd);
3909         return ret;
3910 }
3911 
3912 int system_add_ip_tunnel(const char *name, struct blob_attr *attr)
3913 {
3914         struct blob_attr *tb[__TUNNEL_ATTR_MAX];
3915         struct blob_attr *cur;
3916         const char *str;
3917 
3918         blobmsg_parse(tunnel_attr_list.params, __TUNNEL_ATTR_MAX, tb,
3919                 blob_data(attr), blob_len(attr));
3920 
3921         __system_del_ip_tunnel(name, tb);
3922 
3923         if (!(cur = tb[TUNNEL_ATTR_TYPE]))
3924                 return -EINVAL;
3925         str = blobmsg_data(cur);
3926 
3927         unsigned int ttl = 0;
3928         if ((cur = tb[TUNNEL_ATTR_TTL])) {
3929                 ttl = blobmsg_get_u32(cur);
3930                 if (ttl > 255)
3931                         return -EINVAL;
3932         }
3933 
3934         unsigned int link = 0;
3935         if ((cur = tb[TUNNEL_ATTR_LINK])) {
3936                 struct interface *iface = vlist_find(&interfaces, blobmsg_data(cur), iface, node);
3937                 if (!iface)
3938                         return -EINVAL;
3939 
3940                 if (iface->l3_dev.dev)
3941                         link = iface->l3_dev.dev->ifindex;
3942         }
3943 
3944         if (!strcmp(str, "sit"))
3945                 return system_add_sit_tunnel(name, link, tb);
3946 #ifdef IFLA_IPTUN_MAX
3947         else if (!strcmp(str, "ipip6")) {
3948                 return system_add_ip6_tunnel(name, link, tb);
3949         } else if (!strcmp(str, "greip")) {
3950                 return system_add_gre_tunnel(name, "gre", link, tb, false);
3951         } else if (!strcmp(str, "gretapip"))  {
3952                 return system_add_gre_tunnel(name, "gretap", link, tb, false);
3953         } else if (!strcmp(str, "greip6")) {
3954                 return system_add_gre_tunnel(name, "ip6gre", link, tb, true);
3955         } else if (!strcmp(str, "gretapip6")) {
3956                 return system_add_gre_tunnel(name, "ip6gretap", link, tb, true);
3957 #ifdef IFLA_VTI_MAX
3958         } else if (!strcmp(str, "vtiip")) {
3959                 return system_add_vti_tunnel(name, "vti", link, tb, false);
3960         } else if (!strcmp(str, "vtiip6")) {
3961                 return system_add_vti_tunnel(name, "vti6", link, tb, true);
3962 #endif
3963 #ifdef IFLA_XFRM_MAX
3964         } else if (!strcmp(str, "xfrm")) {
3965                 return system_add_xfrm_tunnel(name, "xfrm", link, tb);
3966 #endif
3967 #ifdef IFLA_VXLAN_MAX
3968         } else if(!strcmp(str, "vxlan")) {
3969                 return system_add_vxlan(name, link, tb, false);
3970         } else if(!strcmp(str, "vxlan6")) {
3971                 return system_add_vxlan(name, link, tb, true);
3972 #endif
3973 #endif
3974         } else if (!strcmp(str, "ipip")) {
3975                 return system_add_proto_tunnel(name, IPPROTO_IPIP, link, tb);
3976         }
3977         else
3978                 return -EINVAL;
3979 
3980         return 0;
3981 }
3982
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Sources/netifd/system-linux.c
