1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2021 Ng Peng Nam Sean
5 * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include "opt_inet.h"
31 #include "opt_inet6.h"
32 #include "opt_route.h"
33 #include <sys/types.h>
34 #include <sys/malloc.h>
35 #include <sys/rmlock.h>
36 #include <sys/socket.h>
37
38 #include <net/if.h>
39 #include <net/route.h>
40 #include <net/route/nhop.h>
41 #include <net/route/route_ctl.h>
42 #include <net/route/route_var.h>
43 #include <netinet6/scope6_var.h>
44 #include <netlink/netlink.h>
45 #include <netlink/netlink_ctl.h>
46 #include <netlink/netlink_route.h>
47 #include <netlink/route/route_var.h>
48
49 #define DEBUG_MOD_NAME nl_route
50 #define DEBUG_MAX_LEVEL LOG_DEBUG3
51 #include <netlink/netlink_debug.h>
52 _DECLARE_DEBUG(LOG_INFO);
53
54 static unsigned char
get_rtm_type(const struct nhop_object * nh)55 get_rtm_type(const struct nhop_object *nh)
56 {
57 int nh_flags = nh->nh_flags;
58
59 /* Use the fact that nhg runtime flags are only NHF_MULTIPATH */
60 if (nh_flags & NHF_BLACKHOLE)
61 return (RTN_BLACKHOLE);
62 else if (nh_flags & NHF_REJECT)
63 return (RTN_PROHIBIT);
64 return (RTN_UNICAST);
65 }
66
67 static uint8_t
nl_get_rtm_protocol(const struct nhop_object * nh)68 nl_get_rtm_protocol(const struct nhop_object *nh)
69 {
70 #ifdef ROUTE_MPATH
71 if (NH_IS_NHGRP(nh)) {
72 const struct nhgrp_object *nhg = (const struct nhgrp_object *)nh;
73 uint8_t origin = nhgrp_get_origin(nhg);
74 if (origin != RTPROT_UNSPEC)
75 return (origin);
76 nh = nhg->nhops[0];
77 }
78 #endif
79 uint8_t origin = nhop_get_origin(nh);
80 if (origin != RTPROT_UNSPEC)
81 return (origin);
82 /* TODO: remove guesswork once all kernel users fill in origin */
83 int rt_flags = nhop_get_rtflags(nh);
84 if (rt_flags & RTF_PROTO1)
85 return (RTPROT_ZEBRA);
86 if (rt_flags & RTF_STATIC)
87 return (RTPROT_STATIC);
88 return (RTPROT_KERNEL);
89 }
90
91 static int
get_rtmsg_type_from_rtsock(int cmd)92 get_rtmsg_type_from_rtsock(int cmd)
93 {
94 switch (cmd) {
95 case RTM_ADD:
96 case RTM_CHANGE:
97 case RTM_GET:
98 return NL_RTM_NEWROUTE;
99 case RTM_DELETE:
100 return NL_RTM_DELROUTE;
101 }
102
103 return (0);
104 }
105
106 /*
107 * fibnum heuristics
108 *
109 * if (dump && rtm_table == 0 && !rta_table) RT_ALL_FIBS
110 * msg rtm_table RTA_TABLE result
111 * RTM_GETROUTE/dump 0 - RT_ALL_FIBS
112 * RTM_GETROUTE/dump 1 - 1
113 * RTM_GETROUTE/get 0 - 0
114 *
115 */
116
117 static struct nhop_object *
rc_get_nhop(const struct rib_cmd_info * rc)118 rc_get_nhop(const struct rib_cmd_info *rc)
119 {
120 return ((rc->rc_cmd == RTM_DELETE) ? rc->rc_nh_old : rc->rc_nh_new);
121 }
122
123 static void
dump_rc_nhop_gw(struct nl_writer * nw,const struct nhop_object * nh)124 dump_rc_nhop_gw(struct nl_writer *nw, const struct nhop_object *nh)
125 {
126 #ifdef INET6
127 int upper_family;
128 #endif
129
130 switch (nhop_get_neigh_family(nh)) {
131 case AF_LINK:
132 /* onlink prefix, skip */
133 break;
134 case AF_INET:
135 nlattr_add(nw, NL_RTA_GATEWAY, 4, &nh->gw4_sa.sin_addr);
136 break;
137 #ifdef INET6
138 case AF_INET6:
139 upper_family = nhop_get_upper_family(nh);
140 if (upper_family == AF_INET6) {
141 struct in6_addr gw6 = nh->gw6_sa.sin6_addr;
142 in6_clearscope(&gw6);
143
144 nlattr_add(nw, NL_RTA_GATEWAY, 16, &gw6);
145 } else if (upper_family == AF_INET) {
146 /* IPv4 over IPv6 */
147 struct in6_addr gw6 = nh->gw6_sa.sin6_addr;
148 in6_clearscope(&gw6);
149
150 char buf[20];
151 struct rtvia *via = (struct rtvia *)&buf[0];
152 via->rtvia_family = AF_INET6;
153 memcpy(via->rtvia_addr, &gw6, 16);
154 nlattr_add(nw, NL_RTA_VIA, 17, via);
155 }
156 break;
157 #endif
158 }
159 }
160
161 static void
dump_rc_nhop_mtu(struct nl_writer * nw,const struct nhop_object * nh)162 dump_rc_nhop_mtu(struct nl_writer *nw, const struct nhop_object *nh)
163 {
164 int nla_len = sizeof(struct nlattr) * 2 + sizeof(uint32_t);
165 struct nlattr *nla = nlmsg_reserve_data(nw, nla_len, struct nlattr);
166
167 if (nla == NULL)
168 return;
169 nla->nla_type = NL_RTA_METRICS;
170 nla->nla_len = nla_len;
171 nla++;
172 nla->nla_type = NL_RTAX_MTU;
173 nla->nla_len = sizeof(struct nlattr) + sizeof(uint32_t);
174 *((uint32_t *)(nla + 1)) = nh->nh_mtu;
175 }
176
177 #ifdef ROUTE_MPATH
178 static void
dump_rc_nhg(struct nl_writer * nw,const struct nhgrp_object * nhg,struct rtmsg * rtm)179 dump_rc_nhg(struct nl_writer *nw, const struct nhgrp_object *nhg, struct rtmsg *rtm)
180 {
181 uint32_t uidx = nhgrp_get_uidx(nhg);
182 uint32_t num_nhops;
183 const struct weightened_nhop *wn = nhgrp_get_nhops(nhg, &num_nhops);
184 uint32_t base_rtflags = nhop_get_rtflags(wn[0].nh);
185
186 if (uidx != 0)
187 nlattr_add_u32(nw, NL_RTA_NH_ID, uidx);
188 nlattr_add_u32(nw, NL_RTA_KNH_ID, nhgrp_get_idx(nhg));
189
190 nlattr_add_u32(nw, NL_RTA_RTFLAGS, base_rtflags);
191 int off = nlattr_add_nested(nw, NL_RTA_MULTIPATH);
192 if (off == 0)
193 return;
194
195 for (int i = 0; i < num_nhops; i++) {
196 int nh_off = nlattr_save_offset(nw);
197 struct rtnexthop *rtnh = nlmsg_reserve_object(nw, struct rtnexthop);
198 if (rtnh == NULL)
199 return;
200 rtnh->rtnh_flags = 0;
201 rtnh->rtnh_ifindex = if_getindex(wn[i].nh->nh_ifp);
202 rtnh->rtnh_hops = wn[i].weight;
203 dump_rc_nhop_gw(nw, wn[i].nh);
204 uint32_t rtflags = nhop_get_rtflags(wn[i].nh);
205 if (rtflags != base_rtflags)
206 nlattr_add_u32(nw, NL_RTA_RTFLAGS, rtflags);
207 if (rtflags & RTF_FIXEDMTU)
208 dump_rc_nhop_mtu(nw, wn[i].nh);
209 rtnh = nlattr_restore_offset(nw, nh_off, struct rtnexthop);
210 /*
211 * nlattr_add() allocates 4-byte aligned storage, no need to aligh
212 * length here
213 * */
214 rtnh->rtnh_len = nlattr_save_offset(nw) - nh_off;
215 }
216 nlattr_set_len(nw, off);
217 }
218 #endif
219
220 static void
dump_rc_nhop(struct nl_writer * nw,const struct route_nhop_data * rnd,struct rtmsg * rtm)221 dump_rc_nhop(struct nl_writer *nw, const struct route_nhop_data *rnd, struct rtmsg *rtm)
222 {
223 #ifdef ROUTE_MPATH
224 if (NH_IS_NHGRP(rnd->rnd_nhop)) {
225 dump_rc_nhg(nw, rnd->rnd_nhgrp, rtm);
226 return;
227 }
228 #endif
229 const struct nhop_object *nh = rnd->rnd_nhop;
230 uint32_t rtflags = nhop_get_rtflags(nh);
231
232 /*
233 * IPv4 over IPv6
234 * ('RTA_VIA', {'family': 10, 'addr': 'fe80::20c:29ff:fe67:2dd'}), ('RTA_OIF', 2),
235 * IPv4 w/ gw
236 * ('RTA_GATEWAY', '172.16.107.131'), ('RTA_OIF', 2)],
237 * Direct route:
238 * ('RTA_OIF', 2)
239 */
240 if (nh->nh_flags & NHF_GATEWAY)
241 dump_rc_nhop_gw(nw, nh);
242
243 uint32_t uidx = nhop_get_uidx(nh);
244 if (uidx != 0)
245 nlattr_add_u32(nw, NL_RTA_NH_ID, uidx);
246 nlattr_add_u32(nw, NL_RTA_KNH_ID, nhop_get_idx(nh));
247 nlattr_add_u32(nw, NL_RTA_RTFLAGS, rtflags);
248
249 if (rtflags & RTF_FIXEDMTU)
250 dump_rc_nhop_mtu(nw, nh);
251 uint32_t nh_expire = nhop_get_expire(nh);
252 if (nh_expire > 0)
253 nlattr_add_u32(nw, NL_RTA_EXPIRES, nh_expire - time_uptime);
254
255 /* In any case, fill outgoing interface */
256 nlattr_add_u32(nw, NL_RTA_OIF, if_getindex(nh->nh_ifp));
257
258 if (rnd->rnd_weight != RT_DEFAULT_WEIGHT)
259 nlattr_add_u32(nw, NL_RTA_WEIGHT, rnd->rnd_weight);
260 }
261
262 /*
263 * Dumps output from a rib command into an rtmsg
264 */
265
266 static int
dump_px(uint32_t fibnum,const struct nlmsghdr * hdr,const struct rtentry * rt,struct route_nhop_data * rnd,struct nl_writer * nw)267 dump_px(uint32_t fibnum, const struct nlmsghdr *hdr,
268 const struct rtentry *rt, struct route_nhop_data *rnd,
269 struct nl_writer *nw)
270 {
271 struct rtmsg *rtm;
272 int error = 0;
273
274 NET_EPOCH_ASSERT();
275
276 if (!nlmsg_reply(nw, hdr, sizeof(struct rtmsg)))
277 goto enomem;
278
279 int family = rt_get_family(rt);
280 int rtm_off = nlattr_save_offset(nw);
281 rtm = nlmsg_reserve_object(nw, struct rtmsg);
282 rtm->rtm_family = family;
283 rtm->rtm_dst_len = 0;
284 rtm->rtm_src_len = 0;
285 rtm->rtm_tos = 0;
286 if (fibnum < 255)
287 rtm->rtm_table = (unsigned char)fibnum;
288 rtm->rtm_scope = RT_SCOPE_UNIVERSE;
289 rtm->rtm_protocol = nl_get_rtm_protocol(rnd->rnd_nhop);
290 rtm->rtm_type = get_rtm_type(rnd->rnd_nhop);
291
292 nlattr_add_u32(nw, NL_RTA_TABLE, fibnum);
293
294 int plen = 0;
295 #if defined(INET) || defined(INET6)
296 uint32_t scopeid;
297 #endif
298 switch (family) {
299 #ifdef INET
300 case AF_INET:
301 {
302 struct in_addr addr;
303 rt_get_inet_prefix_plen(rt, &addr, &plen, &scopeid);
304 nlattr_add(nw, NL_RTA_DST, 4, &addr);
305 break;
306 }
307 #endif
308 #ifdef INET6
309 case AF_INET6:
310 {
311 struct in6_addr addr;
312 rt_get_inet6_prefix_plen(rt, &addr, &plen, &scopeid);
313 nlattr_add(nw, NL_RTA_DST, 16, &addr);
314 break;
315 }
316 #endif
317 default:
318 FIB_LOG(LOG_NOTICE, fibnum, family, "unsupported rt family: %d", family);
319 error = EAFNOSUPPORT;
320 goto flush;
321 }
322
323 rtm = nlattr_restore_offset(nw, rtm_off, struct rtmsg);
324 if (plen > 0)
325 rtm->rtm_dst_len = plen;
326 dump_rc_nhop(nw, rnd, rtm);
327
328 if (nlmsg_end(nw))
329 return (0);
330 enomem:
331 error = ENOMEM;
332 flush:
333 nlmsg_abort(nw);
334 return (error);
335 }
336
337 static int
family_to_group(int family)338 family_to_group(int family)
339 {
340 switch (family) {
341 case AF_INET:
342 return (RTNLGRP_IPV4_ROUTE);
343 case AF_INET6:
344 return (RTNLGRP_IPV6_ROUTE);
345 }
346 return (0);
347 }
348
349 static void
report_operation(uint32_t fibnum,struct rib_cmd_info * rc,struct nlpcb * nlp,struct nlmsghdr * hdr)350 report_operation(uint32_t fibnum, struct rib_cmd_info *rc,
351 struct nlpcb *nlp, struct nlmsghdr *hdr)
352 {
353 struct nl_writer nw = {};
354 uint32_t group_id = family_to_group(rt_get_family(rc->rc_rt));
355
356 if (nlmsg_get_group_writer(&nw, NLMSG_SMALL, NETLINK_ROUTE, group_id)) {
357 struct route_nhop_data rnd = {
358 .rnd_nhop = rc_get_nhop(rc),
359 .rnd_weight = rc->rc_nh_weight,
360 };
361 hdr->nlmsg_flags &= ~(NLM_F_REPLACE | NLM_F_CREATE);
362 hdr->nlmsg_flags &= ~(NLM_F_EXCL | NLM_F_APPEND);
363 switch (rc->rc_cmd) {
364 case RTM_ADD:
365 hdr->nlmsg_type = NL_RTM_NEWROUTE;
366 hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
367 break;
368 case RTM_CHANGE:
369 hdr->nlmsg_type = NL_RTM_NEWROUTE;
370 hdr->nlmsg_flags |= NLM_F_REPLACE;
371 break;
372 case RTM_DELETE:
373 hdr->nlmsg_type = NL_RTM_DELROUTE;
374 break;
375 }
376 dump_px(fibnum, hdr, rc->rc_rt, &rnd, &nw);
377 nlmsg_flush(&nw);
378 }
379
380 rtsock_callback_p->route_f(fibnum, rc);
381 }
382
383 static void
set_scope6(struct sockaddr * sa,struct ifnet * ifp)384 set_scope6(struct sockaddr *sa, struct ifnet *ifp)
385 {
386 #ifdef INET6
387 if (sa != NULL && sa->sa_family == AF_INET6 && ifp != NULL) {
388 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
389
390 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr))
391 in6_set_unicast_scopeid(&sa6->sin6_addr, if_getindex(ifp));
392 }
393 #endif
394 }
395
396 struct rta_mpath_nh {
397 struct sockaddr *gw;
398 struct ifnet *ifp;
399 uint8_t rtnh_flags;
400 uint8_t rtnh_weight;
401 };
402
403 #define _IN(_field) offsetof(struct rtnexthop, _field)
404 #define _OUT(_field) offsetof(struct rta_mpath_nh, _field)
405 const static struct nlattr_parser nla_p_rtnh[] = {
406 { .type = NL_RTA_GATEWAY, .off = _OUT(gw), .cb = nlattr_get_ip },
407 { .type = NL_RTA_VIA, .off = _OUT(gw), .cb = nlattr_get_ipvia },
408 };
409 const static struct nlfield_parser nlf_p_rtnh[] = {
410 { .off_in = _IN(rtnh_flags), .off_out = _OUT(rtnh_flags), .cb = nlf_get_u8 },
411 { .off_in = _IN(rtnh_hops), .off_out = _OUT(rtnh_weight), .cb = nlf_get_u8 },
412 { .off_in = _IN(rtnh_ifindex), .off_out = _OUT(ifp), .cb = nlf_get_ifpz },
413 };
414 #undef _IN
415 #undef _OUT
416
417 static bool
post_p_rtnh(void * _attrs,struct nl_pstate * npt __unused)418 post_p_rtnh(void *_attrs, struct nl_pstate *npt __unused)
419 {
420 struct rta_mpath_nh *attrs = (struct rta_mpath_nh *)_attrs;
421
422 set_scope6(attrs->gw, attrs->ifp);
423 return (true);
424 }
425 NL_DECLARE_PARSER_EXT(mpath_parser, struct rtnexthop, NULL, nlf_p_rtnh, nla_p_rtnh, post_p_rtnh);
426
427 struct rta_mpath {
428 u_int num_nhops;
429 struct rta_mpath_nh nhops[0];
430 };
431
432 static int
nlattr_get_multipath(struct nlattr * nla,struct nl_pstate * npt,const void * arg,void * target)433 nlattr_get_multipath(struct nlattr *nla, struct nl_pstate *npt,
434 const void *arg, void *target)
435 {
436 struct rta_mpath *mp;
437 struct rtnexthop *rtnh;
438 uint16_t data_len, len;
439 u_int max_nhops;
440 int error;
441
442 data_len = nla->nla_len - sizeof(struct nlattr);
443 max_nhops = data_len / sizeof(struct rtnexthop);
444
445 mp = npt_alloc(npt, (max_nhops + 2) * sizeof(struct rta_mpath_nh));
446 mp->num_nhops = 0;
447
448 for (rtnh = (struct rtnexthop *)(nla + 1); data_len > 0; ) {
449 struct rta_mpath_nh *mpnh;
450
451 if (__predict_false(rtnh->rtnh_len <= sizeof(*rtnh) ||
452 rtnh->rtnh_len > data_len)) {
453 NLMSG_REPORT_ERR_MSG(npt, "%s: bad length %u",
454 __func__, rtnh->rtnh_len);
455 return (EINVAL);
456 }
457 mpnh = &mp->nhops[mp->num_nhops++];
458 error = nl_parse_header(rtnh, rtnh->rtnh_len, &mpath_parser,
459 npt, mpnh);
460 if (error != 0) {
461 NLMSG_REPORT_ERR_MSG(npt,
462 "RTA_MULTIPATH: nexthop %u: parse failed",
463 mp->num_nhops - 1);
464 return (error);
465 }
466 len = NL_ITEM_ALIGN(rtnh->rtnh_len);
467 data_len -= len;
468 rtnh = (struct rtnexthop *)((char *)rtnh + len);
469 }
470 if (data_len != 0 || mp->num_nhops == 0) {
471 NLMSG_REPORT_ERR_MSG(npt, "invalid RTA_MULTIPATH attr");
472 return (EINVAL);
473 }
474
475 *((struct rta_mpath **)target) = mp;
476 return (0);
477 }
478
479
480 struct nl_parsed_route {
481 struct sockaddr *rta_dst;
482 struct sockaddr *rta_gw;
483 struct ifnet *rta_oif;
484 struct rta_mpath *rta_multipath;
485 uint32_t rta_table;
486 uint32_t rta_rtflags;
487 uint32_t rta_nh_id;
488 uint32_t rta_weight;
489 uint32_t rtax_mtu;
490 uint8_t rtm_table;
491 uint8_t rtm_family;
492 uint8_t rtm_dst_len;
493 uint8_t rtm_protocol;
494 uint8_t rtm_type;
495 uint32_t rtm_flags;
496 };
497
498 #define _IN(_field) offsetof(struct rtmsg, _field)
499 #define _OUT(_field) offsetof(struct nl_parsed_route, _field)
500 static struct nlattr_parser nla_p_rtmetrics[] = {
501 { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = nlattr_get_uint32 },
502 };
503 NL_DECLARE_ATTR_PARSER(metrics_parser, nla_p_rtmetrics);
504
505 static const struct nlattr_parser nla_p_rtmsg[] = {
506 { .type = NL_RTA_DST, .off = _OUT(rta_dst), .cb = nlattr_get_ip },
507 { .type = NL_RTA_OIF, .off = _OUT(rta_oif), .cb = nlattr_get_ifp },
508 { .type = NL_RTA_GATEWAY, .off = _OUT(rta_gw), .cb = nlattr_get_ip },
509 { .type = NL_RTA_METRICS, .arg = &metrics_parser, .cb = nlattr_get_nested },
510 { .type = NL_RTA_MULTIPATH, .off = _OUT(rta_multipath), .cb = nlattr_get_multipath },
511 { .type = NL_RTA_WEIGHT, .off = _OUT(rta_weight), .cb = nlattr_get_uint32 },
512 { .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = nlattr_get_uint32 },
513 { .type = NL_RTA_TABLE, .off = _OUT(rta_table), .cb = nlattr_get_uint32 },
514 { .type = NL_RTA_VIA, .off = _OUT(rta_gw), .cb = nlattr_get_ipvia },
515 { .type = NL_RTA_NH_ID, .off = _OUT(rta_nh_id), .cb = nlattr_get_uint32 },
516 };
517
518 static const struct nlfield_parser nlf_p_rtmsg[] = {
519 { .off_in = _IN(rtm_family), .off_out = _OUT(rtm_family), .cb = nlf_get_u8 },
520 { .off_in = _IN(rtm_dst_len), .off_out = _OUT(rtm_dst_len), .cb = nlf_get_u8 },
521 { .off_in = _IN(rtm_protocol), .off_out = _OUT(rtm_protocol), .cb = nlf_get_u8 },
522 { .off_in = _IN(rtm_type), .off_out = _OUT(rtm_type), .cb = nlf_get_u8 },
523 { .off_in = _IN(rtm_table), .off_out = _OUT(rtm_table), .cb = nlf_get_u8 },
524 { .off_in = _IN(rtm_flags), .off_out = _OUT(rtm_flags), .cb = nlf_get_u32 },
525 };
526 #undef _IN
527 #undef _OUT
528
529 static bool
post_p_rtmsg(void * _attrs,struct nl_pstate * npt __unused)530 post_p_rtmsg(void *_attrs, struct nl_pstate *npt __unused)
531 {
532 struct nl_parsed_route *attrs = (struct nl_parsed_route *)_attrs;
533
534 set_scope6(attrs->rta_dst, attrs->rta_oif);
535 set_scope6(attrs->rta_gw, attrs->rta_oif);
536 return (true);
537 }
538 NL_DECLARE_PARSER_EXT(rtm_parser, struct rtmsg, NULL, nlf_p_rtmsg, nla_p_rtmsg, post_p_rtmsg);
539
540 struct netlink_walkargs {
541 struct nl_writer *nw;
542 struct route_nhop_data rnd;
543 struct nlmsghdr hdr;
544 struct nlpcb *nlp;
545 uint32_t fibnum;
546 int family;
547 int error;
548 int count;
549 int dumped;
550 int dumped_tables;
551 };
552
553 static int
dump_rtentry(struct rtentry * rt,void * _arg)554 dump_rtentry(struct rtentry *rt, void *_arg)
555 {
556 struct netlink_walkargs *wa = (struct netlink_walkargs *)_arg;
557 int error;
558
559 wa->count++;
560 if (wa->error != 0)
561 return (0);
562 if (!rt_is_exportable(rt, nlp_get_cred(wa->nlp)))
563 return (0);
564 wa->dumped++;
565
566 rt_get_rnd(rt, &wa->rnd);
567
568 error = dump_px(wa->fibnum, &wa->hdr, rt, &wa->rnd, wa->nw);
569
570 IF_DEBUG_LEVEL(LOG_DEBUG3) {
571 char rtbuf[INET6_ADDRSTRLEN + 5];
572 FIB_LOG(LOG_DEBUG3, wa->fibnum, wa->family,
573 "Dump %s, offset %u, error %d",
574 rt_print_buf(rt, rtbuf, sizeof(rtbuf)),
575 wa->nw->offset, error);
576 }
577 wa->error = error;
578
579 return (0);
580 }
581
582 static void
dump_rtable_one(struct netlink_walkargs * wa,uint32_t fibnum,int family)583 dump_rtable_one(struct netlink_walkargs *wa, uint32_t fibnum, int family)
584 {
585 FIB_LOG(LOG_DEBUG2, fibnum, family, "Start dump");
586 wa->count = 0;
587 wa->dumped = 0;
588
589 rib_walk(fibnum, family, false, dump_rtentry, wa);
590
591 wa->dumped_tables++;
592
593 FIB_LOG(LOG_DEBUG2, fibnum, family, "End dump, iterated %d dumped %d",
594 wa->count, wa->dumped);
595 NL_LOG(LOG_DEBUG2, "Current offset: %d", wa->nw->offset);
596 }
597
598 static int
dump_rtable_fib(struct netlink_walkargs * wa,uint32_t fibnum,int family)599 dump_rtable_fib(struct netlink_walkargs *wa, uint32_t fibnum, int family)
600 {
601 wa->fibnum = fibnum;
602
603 if (family == AF_UNSPEC) {
604 for (int i = 0; i < AF_MAX; i++) {
605 if (rt_tables_get_rnh(fibnum, i) != 0) {
606 wa->family = i;
607 dump_rtable_one(wa, fibnum, i);
608 if (wa->error != 0)
609 break;
610 }
611 }
612 } else {
613 if (rt_tables_get_rnh(fibnum, family) != 0) {
614 wa->family = family;
615 dump_rtable_one(wa, fibnum, family);
616 }
617 }
618
619 return (wa->error);
620 }
621
622 static int
handle_rtm_getroute(struct nlpcb * nlp,struct nl_parsed_route * attrs,struct nlmsghdr * hdr,struct nl_pstate * npt)623 handle_rtm_getroute(struct nlpcb *nlp, struct nl_parsed_route *attrs,
624 struct nlmsghdr *hdr, struct nl_pstate *npt)
625 {
626 RIB_RLOCK_TRACKER;
627 struct rib_head *rnh;
628 const struct rtentry *rt;
629 struct route_nhop_data rnd;
630 uint32_t fibnum = attrs->rta_table;
631 sa_family_t family = attrs->rtm_family;
632
633 if (attrs->rta_dst == NULL) {
634 NLMSG_REPORT_ERR_MSG(npt, "No RTA_DST supplied");
635 return (EINVAL);
636 }
637
638 rnh = rt_tables_get_rnh(fibnum, family);
639 if (rnh == NULL)
640 return (EAFNOSUPPORT);
641
642 RIB_RLOCK(rnh);
643
644 struct sockaddr *dst = attrs->rta_dst;
645
646 if (attrs->rtm_flags & RTM_F_PREFIX)
647 rt = rib_lookup_prefix_plen(rnh, dst, attrs->rtm_dst_len, &rnd);
648 else
649 rt = (const struct rtentry *)rnh->rnh_matchaddr(dst, &rnh->head);
650 if (rt == NULL) {
651 RIB_RUNLOCK(rnh);
652 return (ESRCH);
653 }
654
655 rt_get_rnd(rt, &rnd);
656 rnd.rnd_nhop = nhop_select_func(rnd.rnd_nhop, 0);
657
658 RIB_RUNLOCK(rnh);
659
660 if (!rt_is_exportable(rt, nlp_get_cred(nlp)))
661 return (ESRCH);
662
663 IF_DEBUG_LEVEL(LOG_DEBUG2) {
664 char rtbuf[NHOP_PRINT_BUFSIZE] __unused, nhbuf[NHOP_PRINT_BUFSIZE] __unused;
665 FIB_LOG(LOG_DEBUG2, fibnum, family, "getroute completed: got %s for %s",
666 nhop_print_buf_any(rnd.rnd_nhop, nhbuf, sizeof(nhbuf)),
667 rt_print_buf(rt, rtbuf, sizeof(rtbuf)));
668 }
669
670 hdr->nlmsg_type = NL_RTM_NEWROUTE;
671 dump_px(fibnum, hdr, rt, &rnd, npt->nw);
672
673 return (0);
674 }
675
676 static int
handle_rtm_dump(struct nlpcb * nlp,uint32_t fibnum,int family,struct nlmsghdr * hdr,struct nl_writer * nw)677 handle_rtm_dump(struct nlpcb *nlp, uint32_t fibnum, int family,
678 struct nlmsghdr *hdr, struct nl_writer *nw)
679 {
680 struct netlink_walkargs wa = {
681 .nlp = nlp,
682 .nw = nw,
683 .hdr.nlmsg_pid = hdr->nlmsg_pid,
684 .hdr.nlmsg_seq = hdr->nlmsg_seq,
685 .hdr.nlmsg_type = NL_RTM_NEWROUTE,
686 .hdr.nlmsg_flags = hdr->nlmsg_flags | NLM_F_MULTI,
687 };
688
689 if (fibnum == RT_TABLE_UNSPEC) {
690 for (int i = 0; i < V_rt_numfibs; i++) {
691 dump_rtable_fib(&wa, fibnum, family);
692 if (wa.error != 0)
693 break;
694 }
695 } else
696 dump_rtable_fib(&wa, fibnum, family);
697
698 if (wa.error == 0 && wa.dumped_tables == 0) {
699 FIB_LOG(LOG_DEBUG, fibnum, family, "incorrect fibnum/family");
700 wa.error = ESRCH;
701 // How do we propagate it?
702 }
703
704 if (!nlmsg_end_dump(wa.nw, wa.error, &wa.hdr)) {
705 NL_LOG(LOG_DEBUG, "Unable to finalize the dump");
706 return (ENOMEM);
707 }
708
709 return (wa.error);
710 }
711
712 static struct nhop_object *
finalize_nhop(struct nhop_object * nh,const struct sockaddr * dst,int * perror)713 finalize_nhop(struct nhop_object *nh, const struct sockaddr *dst, int *perror)
714 {
715 /*
716 * The following MUST be filled:
717 * nh_ifp, nh_ifa, nh_gw
718 */
719 if (nh->gw_sa.sa_family == 0) {
720 /*
721 * Empty gateway. Can be direct route with RTA_OIF set.
722 */
723 if (nh->nh_ifp != NULL)
724 nhop_set_direct_gw(nh, nh->nh_ifp);
725 else {
726 NL_LOG(LOG_DEBUG, "empty gateway and interface, skipping");
727 *perror = EINVAL;
728 return (NULL);
729 }
730 /* Both nh_ifp and gateway are set */
731 } else {
732 /* Gateway is set up, we can derive ifp if not set */
733 if (nh->nh_ifp == NULL) {
734 uint32_t fibnum = nhop_get_fibnum(nh);
735 uint32_t flags = 0;
736
737 if (nh->nh_flags & NHF_GATEWAY)
738 flags = RTF_GATEWAY;
739 else if (nh->nh_flags & NHF_HOST)
740 flags = RTF_HOST;
741
742 struct ifaddr *ifa = ifa_ifwithroute(flags, dst, &nh->gw_sa, fibnum);
743 if (ifa == NULL) {
744 NL_LOG(LOG_DEBUG, "Unable to determine ifp, skipping");
745 *perror = EINVAL;
746 return (NULL);
747 }
748 nhop_set_transmit_ifp(nh, ifa->ifa_ifp);
749 }
750 }
751 /* Both nh_ifp and gateway are set */
752 if (nh->nh_ifa == NULL) {
753 const struct sockaddr *gw_sa = &nh->gw_sa;
754
755 if (gw_sa->sa_family != dst->sa_family) {
756 /*
757 * Use dst as the target for determining the default
758 * preferred ifa IF
759 * 1) the gateway is link-level (e.g. direct route)
760 * 2) the gateway family is different (e.g. IPv4 over IPv6).
761 */
762 gw_sa = dst;
763 }
764
765 struct ifaddr *ifa = ifaof_ifpforaddr(gw_sa, nh->nh_ifp);
766 if (ifa == NULL) {
767 /* Try link-level ifa. */
768 gw_sa = &nh->gw_sa;
769 ifa = ifaof_ifpforaddr(gw_sa, nh->nh_ifp);
770 if (ifa == NULL) {
771 NL_LOG(LOG_DEBUG, "Unable to determine ifa, skipping");
772 *perror = EINVAL;
773 return (NULL);
774 }
775 }
776 nhop_set_src(nh, ifa);
777 }
778
779 return (nhop_get_nhop(nh, perror));
780 }
781
782 static int
get_pxflag(const struct nl_parsed_route * attrs)783 get_pxflag(const struct nl_parsed_route *attrs)
784 {
785 int pxflag = 0;
786 switch (attrs->rtm_family) {
787 case AF_INET:
788 if (attrs->rtm_dst_len == 32)
789 pxflag = NHF_HOST;
790 else if (attrs->rtm_dst_len == 0)
791 pxflag = NHF_DEFAULT;
792 break;
793 case AF_INET6:
794 if (attrs->rtm_dst_len == 128)
795 pxflag = NHF_HOST;
796 else if (attrs->rtm_dst_len == 0)
797 pxflag = NHF_DEFAULT;
798 break;
799 }
800
801 return (pxflag);
802 }
803
804 static int
get_op_flags(int nlm_flags)805 get_op_flags(int nlm_flags)
806 {
807 int op_flags = 0;
808
809 op_flags |= (nlm_flags & NLM_F_REPLACE) ? RTM_F_REPLACE : 0;
810 op_flags |= (nlm_flags & NLM_F_EXCL) ? RTM_F_EXCL : 0;
811 op_flags |= (nlm_flags & NLM_F_CREATE) ? RTM_F_CREATE : 0;
812 op_flags |= (nlm_flags & NLM_F_APPEND) ? RTM_F_APPEND : 0;
813
814 return (op_flags);
815 }
816
817 #ifdef ROUTE_MPATH
818 static int
create_nexthop_one(struct nl_parsed_route * attrs,struct rta_mpath_nh * mpnh,struct nl_pstate * npt,struct nhop_object ** pnh)819 create_nexthop_one(struct nl_parsed_route *attrs, struct rta_mpath_nh *mpnh,
820 struct nl_pstate *npt, struct nhop_object **pnh)
821 {
822 int error;
823
824 if (mpnh->gw == NULL)
825 return (EINVAL);
826
827 struct nhop_object *nh = nhop_alloc(attrs->rta_table, attrs->rtm_family);
828 if (nh == NULL)
829 return (ENOMEM);
830
831 error = nl_set_nexthop_gw(nh, mpnh->gw, mpnh->ifp, npt);
832 if (error != 0) {
833 nhop_free(nh);
834 return (error);
835 }
836 if (mpnh->ifp != NULL)
837 nhop_set_transmit_ifp(nh, mpnh->ifp);
838 nhop_set_pxtype_flag(nh, get_pxflag(attrs));
839 nhop_set_rtflags(nh, attrs->rta_rtflags);
840 if (attrs->rtm_protocol > RTPROT_STATIC)
841 nhop_set_origin(nh, attrs->rtm_protocol);
842
843 *pnh = finalize_nhop(nh, attrs->rta_dst, &error);
844
845 return (error);
846 }
847 #endif
848
849 static struct nhop_object *
create_nexthop_from_attrs(struct nl_parsed_route * attrs,struct nl_pstate * npt,int * perror)850 create_nexthop_from_attrs(struct nl_parsed_route *attrs,
851 struct nl_pstate *npt, int *perror)
852 {
853 struct nhop_object *nh = NULL;
854 int error = 0;
855
856 if (attrs->rta_multipath != NULL) {
857 #ifdef ROUTE_MPATH
858 /* Multipath w/o explicit nexthops */
859 int num_nhops = attrs->rta_multipath->num_nhops;
860 struct weightened_nhop *wn = npt_alloc(npt, sizeof(*wn) * num_nhops);
861
862 for (int i = 0; i < num_nhops; i++) {
863 struct rta_mpath_nh *mpnh = &attrs->rta_multipath->nhops[i];
864
865 error = create_nexthop_one(attrs, mpnh, npt, &wn[i].nh);
866 if (error != 0) {
867 for (int j = 0; j < i; j++)
868 nhop_free(wn[j].nh);
869 break;
870 }
871 wn[i].weight = mpnh->rtnh_weight > 0 ? mpnh->rtnh_weight : 1;
872 }
873 if (error == 0) {
874 struct rib_head *rh = nhop_get_rh(wn[0].nh);
875 struct nhgrp_object *nhg;
876
877 nhg = nhgrp_alloc(rh->rib_fibnum, rh->rib_family,
878 wn, num_nhops, perror);
879 if (nhg != NULL) {
880 if (attrs->rtm_protocol > RTPROT_STATIC)
881 nhgrp_set_origin(nhg, attrs->rtm_protocol);
882 nhg = nhgrp_get_nhgrp(nhg, perror);
883 }
884 for (int i = 0; i < num_nhops; i++)
885 nhop_free(wn[i].nh);
886 if (nhg != NULL)
887 return ((struct nhop_object *)nhg);
888 error = *perror;
889 }
890 #else
891 error = ENOTSUP;
892 #endif
893 *perror = error;
894 } else {
895 nh = nhop_alloc(attrs->rta_table, attrs->rtm_family);
896 if (nh == NULL) {
897 *perror = ENOMEM;
898 return (NULL);
899 }
900 if (attrs->rta_gw != NULL) {
901 *perror = nl_set_nexthop_gw(nh, attrs->rta_gw, attrs->rta_oif, npt);
902 if (*perror != 0) {
903 nhop_free(nh);
904 return (NULL);
905 }
906 }
907 if (attrs->rta_oif != NULL)
908 nhop_set_transmit_ifp(nh, attrs->rta_oif);
909 if (attrs->rtax_mtu != 0)
910 nhop_set_mtu(nh, attrs->rtax_mtu, true);
911 if (attrs->rta_rtflags & RTF_BROADCAST)
912 nhop_set_broadcast(nh, true);
913 if (attrs->rtm_protocol > RTPROT_STATIC)
914 nhop_set_origin(nh, attrs->rtm_protocol);
915 nhop_set_pxtype_flag(nh, get_pxflag(attrs));
916 nhop_set_rtflags(nh, attrs->rta_rtflags);
917
918 switch (attrs->rtm_type) {
919 case RTN_UNICAST:
920 break;
921 case RTN_BLACKHOLE:
922 nhop_set_blackhole(nh, RTF_BLACKHOLE);
923 break;
924 case RTN_PROHIBIT:
925 case RTN_UNREACHABLE:
926 nhop_set_blackhole(nh, RTF_REJECT);
927 break;
928 /* TODO: return ENOTSUP for other types if strict option is set */
929 }
930
931 nh = finalize_nhop(nh, attrs->rta_dst, perror);
932 }
933
934 return (nh);
935 }
936
937 static int
rtnl_handle_newroute(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)938 rtnl_handle_newroute(struct nlmsghdr *hdr, struct nlpcb *nlp,
939 struct nl_pstate *npt)
940 {
941 struct rib_cmd_info rc = {};
942 struct nhop_object *nh = NULL;
943 int error;
944
945 struct nl_parsed_route attrs = {};
946 error = nl_parse_nlmsg(hdr, &rtm_parser, npt, &attrs);
947 if (error != 0)
948 return (error);
949
950 /* Check if we have enough data */
951 if (attrs.rta_dst == NULL) {
952 NL_LOG(LOG_DEBUG, "missing RTA_DST");
953 return (EINVAL);
954 }
955
956 /* pre-2.6.19 Linux API compatibility */
957 if (attrs.rtm_table > 0 && attrs.rta_table == 0)
958 attrs.rta_table = attrs.rtm_table;
959 if (attrs.rta_table >= V_rt_numfibs || attrs.rtm_family > AF_MAX) {
960 NLMSG_REPORT_ERR_MSG(npt, "invalid fib");
961 return (EINVAL);
962 }
963
964 if (attrs.rta_nh_id != 0) {
965 /* Referenced uindex */
966 int pxflag = get_pxflag(&attrs);
967 nh = nl_find_nhop(attrs.rta_table, attrs.rtm_family, attrs.rta_nh_id,
968 pxflag, &error);
969 if (error != 0)
970 return (error);
971 } else {
972 nh = create_nexthop_from_attrs(&attrs, npt, &error);
973 if (error != 0) {
974 NL_LOG(LOG_DEBUG, "Error creating nexthop");
975 return (error);
976 }
977 }
978
979 if (!NH_IS_NHGRP(nh) && attrs.rta_weight == 0)
980 attrs.rta_weight = RT_DEFAULT_WEIGHT;
981 struct route_nhop_data rnd = { .rnd_nhop = nh, .rnd_weight = attrs.rta_weight };
982 int op_flags = get_op_flags(hdr->nlmsg_flags);
983
984 error = rib_add_route_px(attrs.rta_table, attrs.rta_dst, attrs.rtm_dst_len,
985 &rnd, op_flags, &rc);
986 if (error == 0)
987 report_operation(attrs.rta_table, &rc, nlp, hdr);
988 return (error);
989 }
990
991 static int
path_match_func(const struct rtentry * rt,const struct nhop_object * nh,void * _data)992 path_match_func(const struct rtentry *rt, const struct nhop_object *nh, void *_data)
993 {
994 struct nl_parsed_route *attrs = (struct nl_parsed_route *)_data;
995
996 if ((attrs->rta_gw != NULL) && !rib_match_gw(rt, nh, attrs->rta_gw))
997 return (0);
998
999 if ((attrs->rta_oif != NULL) && (attrs->rta_oif != nh->nh_ifp))
1000 return (0);
1001
1002 return (1);
1003 }
1004
1005 static int
rtnl_handle_delroute(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)1006 rtnl_handle_delroute(struct nlmsghdr *hdr, struct nlpcb *nlp,
1007 struct nl_pstate *npt)
1008 {
1009 struct rib_cmd_info rc;
1010 int error;
1011
1012 struct nl_parsed_route attrs = {};
1013 error = nl_parse_nlmsg(hdr, &rtm_parser, npt, &attrs);
1014 if (error != 0)
1015 return (error);
1016
1017 if (attrs.rta_dst == NULL) {
1018 NLMSG_REPORT_ERR_MSG(npt, "RTA_DST is not set");
1019 return (ESRCH);
1020 }
1021
1022 if (attrs.rta_table >= V_rt_numfibs || attrs.rtm_family > AF_MAX) {
1023 NLMSG_REPORT_ERR_MSG(npt, "invalid fib");
1024 return (EINVAL);
1025 }
1026
1027 error = rib_del_route_px(attrs.rta_table, attrs.rta_dst,
1028 attrs.rtm_dst_len, path_match_func, &attrs,
1029 (attrs.rta_rtflags & RTF_PINNED) ? RTM_F_FORCE : 0, &rc);
1030 if (error == 0)
1031 report_operation(attrs.rta_table, &rc, nlp, hdr);
1032 return (error);
1033 }
1034
1035 static int
rtnl_handle_getroute(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)1036 rtnl_handle_getroute(struct nlmsghdr *hdr, struct nlpcb *nlp, struct nl_pstate *npt)
1037 {
1038 int error;
1039
1040 struct nl_parsed_route attrs = {};
1041 error = nl_parse_nlmsg(hdr, &rtm_parser, npt, &attrs);
1042 if (error != 0)
1043 return (error);
1044
1045 if (attrs.rta_table >= V_rt_numfibs || attrs.rtm_family > AF_MAX) {
1046 NLMSG_REPORT_ERR_MSG(npt, "invalid fib");
1047 return (EINVAL);
1048 }
1049
1050 if (hdr->nlmsg_flags & NLM_F_DUMP)
1051 error = handle_rtm_dump(nlp, attrs.rta_table, attrs.rtm_family, hdr, npt->nw);
1052 else
1053 error = handle_rtm_getroute(nlp, &attrs, hdr, npt);
1054
1055 return (error);
1056 }
1057
1058 void
rtnl_handle_route_event(uint32_t fibnum,const struct rib_cmd_info * rc)1059 rtnl_handle_route_event(uint32_t fibnum, const struct rib_cmd_info *rc)
1060 {
1061 struct nl_writer nw = {};
1062 int family, nlm_flags = 0;
1063
1064 family = rt_get_family(rc->rc_rt);
1065
1066 /* XXX: check if there are active listeners first */
1067
1068 /* TODO: consider passing PID/type/seq */
1069 switch (rc->rc_cmd) {
1070 case RTM_ADD:
1071 nlm_flags = NLM_F_EXCL | NLM_F_CREATE;
1072 break;
1073 case RTM_CHANGE:
1074 nlm_flags = NLM_F_REPLACE;
1075 break;
1076 case RTM_DELETE:
1077 nlm_flags = 0;
1078 break;
1079 }
1080 IF_DEBUG_LEVEL(LOG_DEBUG2) {
1081 char rtbuf[NHOP_PRINT_BUFSIZE] __unused;
1082 FIB_LOG(LOG_DEBUG2, fibnum, family,
1083 "received event %s for %s / nlm_flags=%X",
1084 rib_print_cmd(rc->rc_cmd),
1085 rt_print_buf(rc->rc_rt, rtbuf, sizeof(rtbuf)),
1086 nlm_flags);
1087 }
1088
1089 struct nlmsghdr hdr = {
1090 .nlmsg_flags = nlm_flags,
1091 .nlmsg_type = get_rtmsg_type_from_rtsock(rc->rc_cmd),
1092 };
1093
1094 struct route_nhop_data rnd = {
1095 .rnd_nhop = rc_get_nhop(rc),
1096 .rnd_weight = rc->rc_nh_weight,
1097 };
1098
1099 uint32_t group_id = family_to_group(family);
1100 if (!nlmsg_get_group_writer(&nw, NLMSG_SMALL, NETLINK_ROUTE, group_id)) {
1101 NL_LOG(LOG_DEBUG, "error allocating event buffer");
1102 return;
1103 }
1104
1105 dump_px(fibnum, &hdr, rc->rc_rt, &rnd, &nw);
1106 nlmsg_flush(&nw);
1107 }
1108
1109 static const struct rtnl_cmd_handler cmd_handlers[] = {
1110 {
1111 .cmd = NL_RTM_GETROUTE,
1112 .name = "RTM_GETROUTE",
1113 .cb = &rtnl_handle_getroute,
1114 .flags = RTNL_F_ALLOW_NONVNET_JAIL,
1115 },
1116 {
1117 .cmd = NL_RTM_DELROUTE,
1118 .name = "RTM_DELROUTE",
1119 .cb = &rtnl_handle_delroute,
1120 .priv = PRIV_NET_ROUTE,
1121 },
1122 {
1123 .cmd = NL_RTM_NEWROUTE,
1124 .name = "RTM_NEWROUTE",
1125 .cb = &rtnl_handle_newroute,
1126 .priv = PRIV_NET_ROUTE,
1127 }
1128 };
1129
1130 static const struct nlhdr_parser *all_parsers[] = {&mpath_parser, &metrics_parser, &rtm_parser};
1131
1132 void
rtnl_routes_init(void)1133 rtnl_routes_init(void)
1134 {
1135 NL_VERIFY_PARSERS(all_parsers);
1136 rtnl_register_messages(cmd_handlers, NL_ARRAY_LEN(cmd_handlers));
1137 }
1138