1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 #include "opt_inet.h"
30 #include "opt_inet6.h"
31 #include <sys/types.h>
32 #include <sys/eventhandler.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/socket.h>
36 #include <sys/syslog.h>
37
38 #include <net/if.h>
39 #include <net/if_var.h>
40 #include <net/if_llatbl.h>
41 #include <netlink/netlink.h>
42 #include <netlink/netlink_ctl.h>
43 #include <netlink/netlink_route.h>
44 #include <netlink/route/route_var.h>
45
46 #include <netinet6/in6_var.h> /* nd6.h requires this */
47 #include <netinet6/nd6.h> /* nd6 state machine */
48 #include <netinet6/scope6_var.h> /* scope deembedding */
49
50 #define DEBUG_MOD_NAME nl_neigh
51 #define DEBUG_MAX_LEVEL LOG_DEBUG3
52 #include <netlink/netlink_debug.h>
53 _DECLARE_DEBUG(LOG_INFO);
54
55 static int lle_families[] = { AF_INET, AF_INET6 };
56
57 static eventhandler_tag lle_event_p;
58
59 struct netlink_walkargs {
60 struct nl_writer *nw;
61 struct nlmsghdr hdr;
62 struct nlpcb *so;
63 if_t ifp;
64 int family;
65 int error;
66 int count;
67 int dumped;
68 };
69
70 static int
lle_state_to_nl_state(int family,struct llentry * lle)71 lle_state_to_nl_state(int family, struct llentry *lle)
72 {
73 int state = lle->ln_state;
74
75 switch (family) {
76 case AF_INET:
77 if (lle->la_flags & (LLE_STATIC | LLE_IFADDR))
78 state = 1;
79 switch (state) {
80 case 0: /* ARP_LLINFO_INCOMPLETE */
81 return (NUD_INCOMPLETE);
82 case 1: /* ARP_LLINFO_REACHABLE */
83 return (NUD_REACHABLE);
84 case 2: /* ARP_LLINFO_VERIFY */
85 return (NUD_PROBE);
86 }
87 break;
88 case AF_INET6:
89 switch (state) {
90 case ND6_LLINFO_INCOMPLETE:
91 return (NUD_INCOMPLETE);
92 case ND6_LLINFO_REACHABLE:
93 return (NUD_REACHABLE);
94 case ND6_LLINFO_STALE:
95 return (NUD_STALE);
96 case ND6_LLINFO_DELAY:
97 return (NUD_DELAY);
98 case ND6_LLINFO_PROBE:
99 return (NUD_PROBE);
100 }
101 break;
102 }
103
104 return (NUD_NONE);
105 }
106
107 static uint32_t
lle_flags_to_nl_flags(const struct llentry * lle)108 lle_flags_to_nl_flags(const struct llentry *lle)
109 {
110 uint32_t nl_flags = 0;
111
112 if (lle->la_flags & LLE_IFADDR)
113 nl_flags |= NTF_SELF;
114 if (lle->la_flags & LLE_PUB)
115 nl_flags |= NTF_PROXY;
116 if (lle->la_flags & LLE_STATIC)
117 nl_flags |= NTF_STICKY;
118 if (lle->ln_router != 0)
119 nl_flags |= NTF_ROUTER;
120
121 return (nl_flags);
122 }
123
124 static uint32_t
get_lle_next_ts(const struct llentry * lle)125 get_lle_next_ts(const struct llentry *lle)
126 {
127 if (lle->la_expire == 0)
128 return (0);
129 return (lle->la_expire + lle->lle_remtime / hz + time_second - time_uptime);
130 }
131
132 static int
dump_lle_locked(struct llentry * lle,void * arg)133 dump_lle_locked(struct llentry *lle, void *arg)
134 {
135 struct netlink_walkargs *wa = (struct netlink_walkargs *)arg;
136 struct nlmsghdr *hdr = &wa->hdr;
137 struct nl_writer *nw = wa->nw;
138 struct ndmsg *ndm;
139 #if defined(INET) || defined(INET6)
140 union {
141 struct in_addr in;
142 struct in6_addr in6;
143 } addr;
144 #endif
145
146 IF_DEBUG_LEVEL(LOG_DEBUG2) {
147 char llebuf[NHOP_PRINT_BUFSIZE];
148 llentry_print_buf_lltable(lle, llebuf, sizeof(llebuf));
149 NL_LOG(LOG_DEBUG2, "dumping %s", llebuf);
150 }
151
152 if (!nlmsg_reply(nw, hdr, sizeof(struct ndmsg)))
153 goto enomem;
154
155 ndm = nlmsg_reserve_object(nw, struct ndmsg);
156 ndm->ndm_family = wa->family;
157 ndm->ndm_ifindex = if_getindex(wa->ifp);
158 ndm->ndm_state = lle_state_to_nl_state(wa->family, lle);
159 ndm->ndm_flags = lle_flags_to_nl_flags(lle);
160
161 switch (wa->family) {
162 #ifdef INET
163 case AF_INET:
164 addr.in = lle->r_l3addr.addr4;
165 nlattr_add(nw, NDA_DST, 4, &addr);
166 break;
167 #endif
168 #ifdef INET6
169 case AF_INET6:
170 addr.in6 = lle->r_l3addr.addr6;
171 in6_clearscope(&addr.in6);
172 nlattr_add(nw, NDA_DST, 16, &addr);
173 break;
174 #endif
175 }
176
177 if (lle->r_flags & RLLE_VALID) {
178 /* Has L2 */
179 int addrlen = if_getaddrlen(wa->ifp);
180 nlattr_add(nw, NDA_LLADDR, addrlen, lle->ll_addr);
181 }
182
183 nlattr_add_u32(nw, NDA_PROBES, lle->la_asked);
184
185 struct nda_cacheinfo *cache;
186 cache = nlmsg_reserve_attr(nw, NDA_CACHEINFO, struct nda_cacheinfo);
187 if (cache == NULL)
188 goto enomem;
189 /* TODO: provide confirmed/updated */
190 cache->ndm_refcnt = lle->lle_refcnt;
191
192 int off = nlattr_add_nested(nw, NDA_FREEBSD);
193 if (off != 0) {
194 nlattr_add_u32(nw, NDAF_NEXT_STATE_TS, get_lle_next_ts(lle));
195
196 nlattr_set_len(nw, off);
197 }
198
199 if (nlmsg_end(nw))
200 return (0);
201 enomem:
202 NL_LOG(LOG_DEBUG, "unable to dump lle state (ENOMEM)");
203 nlmsg_abort(nw);
204 return (ENOMEM);
205 }
206
207 static int
dump_lle(struct lltable * llt,struct llentry * lle,void * arg)208 dump_lle(struct lltable *llt, struct llentry *lle, void *arg)
209 {
210 int error;
211
212 LLE_RLOCK(lle);
213 error = dump_lle_locked(lle, arg);
214 LLE_RUNLOCK(lle);
215 return (error);
216 }
217
218 static bool
dump_llt(struct lltable * llt,struct netlink_walkargs * wa)219 dump_llt(struct lltable *llt, struct netlink_walkargs *wa)
220 {
221 lltable_foreach_lle(llt, dump_lle, wa);
222
223 return (true);
224 }
225
226 static int
dump_llts_iface(struct netlink_walkargs * wa,if_t ifp,int family)227 dump_llts_iface(struct netlink_walkargs *wa, if_t ifp, int family)
228 {
229 int error = 0;
230
231 wa->ifp = ifp;
232 for (int i = 0; i < sizeof(lle_families) / sizeof(int); i++) {
233 int fam = lle_families[i];
234 struct lltable *llt = lltable_get(ifp, fam);
235 if (llt != NULL && (family == 0 || family == fam)) {
236 wa->count++;
237 wa->family = fam;
238 if (!dump_llt(llt, wa)) {
239 error = ENOMEM;
240 break;
241 }
242 wa->dumped++;
243 }
244 }
245 return (error);
246 }
247
248 static int
dump_llts(struct netlink_walkargs * wa,if_t ifp,int family)249 dump_llts(struct netlink_walkargs *wa, if_t ifp, int family)
250 {
251 NL_LOG(LOG_DEBUG2, "Start dump ifp=%s family=%d", ifp ? if_name(ifp) : "NULL", family);
252
253 wa->hdr.nlmsg_flags |= NLM_F_MULTI;
254
255 if (ifp != NULL) {
256 dump_llts_iface(wa, ifp, family);
257 } else {
258 struct if_iter it;
259
260 for (ifp = if_iter_start(&it); ifp != NULL; ifp = if_iter_next(&it)) {
261 dump_llts_iface(wa, ifp, family);
262 }
263 if_iter_finish(&it);
264 }
265
266 NL_LOG(LOG_DEBUG2, "End dump, iterated %d dumped %d", wa->count, wa->dumped);
267
268 if (!nlmsg_end_dump(wa->nw, wa->error, &wa->hdr)) {
269 NL_LOG(LOG_DEBUG, "Unable to add new message");
270 return (ENOMEM);
271 }
272
273 return (0);
274 }
275
276 static int
get_lle(struct netlink_walkargs * wa,if_t ifp,int family,struct sockaddr * dst)277 get_lle(struct netlink_walkargs *wa, if_t ifp, int family, struct sockaddr *dst)
278 {
279 struct lltable *llt = lltable_get(ifp, family);
280 if (llt == NULL)
281 return (ESRCH);
282
283 struct llentry *lle = lla_lookup(llt, LLE_UNLOCKED, dst);
284 if (lle == NULL)
285 return (ESRCH);
286
287 wa->ifp = ifp;
288 wa->family = family;
289
290 return (dump_lle(llt, lle, wa));
291 }
292
293 static void
set_scope6(struct sockaddr * sa,if_t ifp)294 set_scope6(struct sockaddr *sa, if_t ifp)
295 {
296 #ifdef INET6
297 if (sa != NULL && sa->sa_family == AF_INET6 && ifp != NULL) {
298 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
299
300 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr))
301 in6_set_unicast_scopeid(&sa6->sin6_addr, if_getindex(ifp));
302 }
303 #endif
304 }
305
306 struct nl_parsed_neigh {
307 struct sockaddr *nda_dst;
308 struct ifnet *nda_ifp;
309 struct nlattr *nda_lladdr;
310 uint32_t ndaf_next_ts;
311 uint32_t ndm_flags;
312 uint16_t ndm_state;
313 uint8_t ndm_family;
314 };
315
316 #define _IN(_field) offsetof(struct ndmsg, _field)
317 #define _OUT(_field) offsetof(struct nl_parsed_neigh, _field)
318 static const struct nlattr_parser nla_p_neigh_fbsd[] = {
319 { .type = NDAF_NEXT_STATE_TS, .off = _OUT(ndaf_next_ts), .cb = nlattr_get_uint32 },
320 };
321 NL_DECLARE_ATTR_PARSER(neigh_fbsd_parser, nla_p_neigh_fbsd);
322
323 static const struct nlfield_parser nlf_p_neigh[] = {
324 { .off_in = _IN(ndm_family), .off_out = _OUT(ndm_family), .cb = nlf_get_u8 },
325 { .off_in = _IN(ndm_flags), .off_out = _OUT(ndm_flags), .cb = nlf_get_u8_u32 },
326 { .off_in = _IN(ndm_state), .off_out = _OUT(ndm_state), .cb = nlf_get_u16 },
327 { .off_in = _IN(ndm_ifindex), .off_out = _OUT(nda_ifp), .cb = nlf_get_ifpz },
328 };
329
330 static const struct nlattr_parser nla_p_neigh[] = {
331 { .type = NDA_DST, .off = _OUT(nda_dst), .cb = nlattr_get_ip },
332 { .type = NDA_LLADDR, .off = _OUT(nda_lladdr), .cb = nlattr_get_nla },
333 { .type = NDA_IFINDEX, .off = _OUT(nda_ifp), .cb = nlattr_get_ifp },
334 { .type = NDA_FLAGS_EXT, .off = _OUT(ndm_flags), .cb = nlattr_get_uint32 },
335 { .type = NDA_FREEBSD, .arg = &neigh_fbsd_parser, .cb = nlattr_get_nested },
336 };
337 #undef _IN
338 #undef _OUT
339
340 static bool
post_p_neigh(void * _attrs,struct nl_pstate * npt __unused)341 post_p_neigh(void *_attrs, struct nl_pstate *npt __unused)
342 {
343 struct nl_parsed_neigh *attrs = (struct nl_parsed_neigh *)_attrs;
344
345 set_scope6(attrs->nda_dst, attrs->nda_ifp);
346 return (true);
347 }
348 NL_DECLARE_PARSER_EXT(ndmsg_parser, struct ndmsg, NULL, nlf_p_neigh, nla_p_neigh, post_p_neigh);
349
350
351 /*
352 * type=RTM_NEWNEIGH, flags=NLM_F_REQUEST|NLM_F_ACK|NLM_F_EXCL|NLM_F_CREATE, seq=1661941473, pid=0},
353 * {ndm_family=AF_INET6, ndm_ifindex=if_nametoindex("enp0s31f6"), ndm_state=NUD_PERMANENT, ndm_flags=0, ndm_type=RTN_UNSPEC},
354 * [
355 * {{nla_len=20, nla_type=NDA_DST}, inet_pton(AF_INET6, "2a01:4f8:13a:70c::3")},
356 * {{nla_len=10, nla_type=NDA_LLADDR}, 20:4e:71:62:ae:f2}]}, iov_len=60}
357 */
358
359 static int
rtnl_handle_newneigh(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)360 rtnl_handle_newneigh(struct nlmsghdr *hdr, struct nlpcb *nlp, struct nl_pstate *npt)
361 {
362 int error;
363
364 struct nl_parsed_neigh attrs = {};
365 error = nl_parse_nlmsg(hdr, &ndmsg_parser, npt, &attrs);
366 if (error != 0)
367 return (error);
368
369 if (attrs.nda_ifp == NULL || attrs.nda_dst == NULL || attrs.nda_lladdr == NULL) {
370 if (attrs.nda_ifp == NULL)
371 NLMSG_REPORT_ERR_MSG(npt, "NDA_IFINDEX / ndm_ifindex not set");
372 if (attrs.nda_dst == NULL)
373 NLMSG_REPORT_ERR_MSG(npt, "NDA_DST not set");
374 if (attrs.nda_lladdr == NULL)
375 NLMSG_REPORT_ERR_MSG(npt, "NDA_LLADDR not set");
376 return (EINVAL);
377 }
378
379 if (attrs.nda_dst->sa_family != attrs.ndm_family) {
380 NLMSG_REPORT_ERR_MSG(npt,
381 "NDA_DST family (%d) is different from ndm_family (%d)",
382 attrs.nda_dst->sa_family, attrs.ndm_family);
383 return (EINVAL);
384 }
385
386 int addrlen = if_getaddrlen(attrs.nda_ifp);
387 if (attrs.nda_lladdr->nla_len != sizeof(struct nlattr) + addrlen) {
388 NLMSG_REPORT_ERR_MSG(npt,
389 "NDA_LLADDR address length (%d) is different from expected (%d)",
390 (int)attrs.nda_lladdr->nla_len - (int)sizeof(struct nlattr), addrlen);
391 return (EINVAL);
392 }
393
394 const uint16_t supported_flags = NTF_PROXY | NTF_STICKY;
395 if ((attrs.ndm_flags & supported_flags) != attrs.ndm_flags) {
396 NLMSG_REPORT_ERR_MSG(npt, "ndm_flags %X not supported",
397 attrs.ndm_flags &~ supported_flags);
398 return (ENOTSUP);
399 }
400
401 /* Replacement requires new entry creation anyway */
402 if ((hdr->nlmsg_flags & (NLM_F_CREATE | NLM_F_REPLACE)) == 0)
403 return (ENOTSUP);
404
405 struct lltable *llt = lltable_get(attrs.nda_ifp, attrs.ndm_family);
406 if (llt == NULL)
407 return (EAFNOSUPPORT);
408
409
410 uint8_t linkhdr[LLE_MAX_LINKHDR];
411 size_t linkhdrsize = sizeof(linkhdr);
412 int lladdr_off = 0;
413 if (lltable_calc_llheader(attrs.nda_ifp, attrs.ndm_family,
414 (char *)(attrs.nda_lladdr + 1), linkhdr, &linkhdrsize, &lladdr_off) != 0) {
415 NLMSG_REPORT_ERR_MSG(npt, "unable to calculate lle prepend data");
416 return (EINVAL);
417 }
418
419 int lle_flags = (attrs.ndm_flags & NTF_PROXY) ? LLE_PUB : 0;
420 if (attrs.ndm_flags & NTF_STICKY)
421 lle_flags |= LLE_STATIC;
422 struct llentry *lle = lltable_alloc_entry(llt, lle_flags, attrs.nda_dst);
423 if (lle == NULL)
424 return (ENOMEM);
425 lltable_set_entry_addr(attrs.nda_ifp, lle, linkhdr, linkhdrsize, lladdr_off);
426
427 if (attrs.ndm_flags & NTF_STICKY)
428 lle->la_expire = 0;
429 else
430 lle->la_expire = attrs.ndaf_next_ts - time_second + time_uptime;
431
432 /* llentry created, try to insert or update */
433 LLTABLE_LOCK(llt);
434 LLE_WLOCK(lle);
435 struct llentry *lle_tmp = lla_lookup(llt, LLE_EXCLUSIVE, attrs.nda_dst);
436 if (lle_tmp != NULL) {
437 error = EEXIST;
438 if (hdr->nlmsg_flags & NLM_F_REPLACE) {
439 error = EPERM;
440 if ((lle_tmp->la_flags & LLE_IFADDR) == 0) {
441 error = 0; /* success */
442 lltable_unlink_entry(llt, lle_tmp);
443 llentry_free(lle_tmp);
444 lle_tmp = NULL;
445 lltable_link_entry(llt, lle);
446 }
447 }
448 if (lle_tmp)
449 LLE_WUNLOCK(lle_tmp);
450 } else {
451 if (hdr->nlmsg_flags & NLM_F_CREATE)
452 lltable_link_entry(llt, lle);
453 else
454 error = ENOENT;
455 }
456 LLTABLE_UNLOCK(llt);
457
458 if (error != 0) {
459 /* throw away the newly allocated llentry */
460 llentry_free(lle);
461 return (error);
462 }
463
464 /* XXX: We're inside epoch */
465 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_RESOLVED);
466 LLE_WUNLOCK(lle);
467 llt->llt_post_resolved(llt, lle);
468
469 return (0);
470 }
471
472 static int
rtnl_handle_delneigh(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)473 rtnl_handle_delneigh(struct nlmsghdr *hdr, struct nlpcb *nlp, struct nl_pstate *npt)
474 {
475 int error;
476
477 struct nl_parsed_neigh attrs = {};
478 error = nl_parse_nlmsg(hdr, &ndmsg_parser, npt, &attrs);
479 if (error != 0)
480 return (error);
481
482 if (attrs.nda_dst == NULL) {
483 NLMSG_REPORT_ERR_MSG(npt, "NDA_DST not set");
484 return (EINVAL);
485 }
486
487 if (attrs.nda_ifp == NULL) {
488 NLMSG_REPORT_ERR_MSG(npt, "no ifindex provided");
489 return (EINVAL);
490 }
491
492 struct lltable *llt = lltable_get(attrs.nda_ifp, attrs.ndm_family);
493 if (llt == NULL)
494 return (EAFNOSUPPORT);
495
496 return (lltable_delete_addr(llt, 0, attrs.nda_dst));
497 }
498
499 static int
rtnl_handle_getneigh(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)500 rtnl_handle_getneigh(struct nlmsghdr *hdr, struct nlpcb *nlp, struct nl_pstate *npt)
501 {
502 int error;
503
504 struct nl_parsed_neigh attrs = {};
505 error = nl_parse_nlmsg(hdr, &ndmsg_parser, npt, &attrs);
506 if (error != 0)
507 return (error);
508
509 if (attrs.nda_dst != NULL && attrs.nda_ifp == NULL) {
510 NLMSG_REPORT_ERR_MSG(npt, "has NDA_DST but no ifindex provided");
511 return (EINVAL);
512 }
513
514 struct netlink_walkargs wa = {
515 .so = nlp,
516 .nw = npt->nw,
517 .hdr.nlmsg_pid = hdr->nlmsg_pid,
518 .hdr.nlmsg_seq = hdr->nlmsg_seq,
519 .hdr.nlmsg_flags = hdr->nlmsg_flags,
520 .hdr.nlmsg_type = NL_RTM_NEWNEIGH,
521 };
522
523 if (attrs.nda_dst == NULL)
524 error = dump_llts(&wa, attrs.nda_ifp, attrs.ndm_family);
525 else
526 error = get_lle(&wa, attrs.nda_ifp, attrs.ndm_family, attrs.nda_dst);
527
528 return (error);
529 }
530
531 static const struct rtnl_cmd_handler cmd_handlers[] = {
532 {
533 .cmd = NL_RTM_NEWNEIGH,
534 .name = "RTM_NEWNEIGH",
535 .cb = &rtnl_handle_newneigh,
536 .priv = PRIV_NET_ROUTE,
537 },
538 {
539 .cmd = NL_RTM_DELNEIGH,
540 .name = "RTM_DELNEIGH",
541 .cb = &rtnl_handle_delneigh,
542 .priv = PRIV_NET_ROUTE,
543 },
544 {
545 .cmd = NL_RTM_GETNEIGH,
546 .name = "RTM_GETNEIGH",
547 .cb = &rtnl_handle_getneigh,
548 }
549 };
550
551 static void
rtnl_lle_event(void * arg __unused,struct llentry * lle,int evt)552 rtnl_lle_event(void *arg __unused, struct llentry *lle, int evt)
553 {
554 struct nl_writer nw;
555 if_t ifp;
556 int family;
557
558 LLE_WLOCK_ASSERT(lle);
559
560 ifp = lltable_get_ifp(lle->lle_tbl);
561 family = lltable_get_af(lle->lle_tbl);
562
563 if (family != AF_INET && family != AF_INET6)
564 return;
565
566 int nlmsgs_type = evt == LLENTRY_RESOLVED ? NL_RTM_NEWNEIGH : NL_RTM_DELNEIGH;
567
568 if (!nl_writer_group(&nw, NLMSG_SMALL, NETLINK_ROUTE, RTNLGRP_NEIGH, 0,
569 false)) {
570 NL_LOG(LOG_DEBUG, "error allocating group writer");
571 return;
572 }
573
574 struct netlink_walkargs wa = {
575 .hdr.nlmsg_type = nlmsgs_type,
576 .nw = &nw,
577 .ifp = ifp,
578 .family = family,
579 };
580
581 dump_lle_locked(lle, &wa);
582 nlmsg_flush(&nw);
583 }
584
585 static const struct nlhdr_parser *all_parsers[] = { &ndmsg_parser, &neigh_fbsd_parser };
586
587 void
rtnl_neighs_init(void)588 rtnl_neighs_init(void)
589 {
590 NL_VERIFY_PARSERS(all_parsers);
591 rtnl_register_messages(cmd_handlers, nitems(cmd_handlers));
592 lle_event_p = EVENTHANDLER_REGISTER(lle_event, rtnl_lle_event, NULL,
593 EVENTHANDLER_PRI_ANY);
594 }
595
596 void
rtnl_neighs_destroy(void)597 rtnl_neighs_destroy(void)
598 {
599 EVENTHANDLER_DEREGISTER(lle_event, lle_event_p);
600 }
601