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 (nl_writer_group(&nw, NLMSG_SMALL, NETLINK_ROUTE, group_id, 0,
357 false)) {
358 struct route_nhop_data rnd = {
359 .rnd_nhop = rc_get_nhop(rc),
360 .rnd_weight = rc->rc_nh_weight,
361 };
362 hdr->nlmsg_flags &= ~(NLM_F_REPLACE | NLM_F_CREATE);
363 hdr->nlmsg_flags &= ~(NLM_F_EXCL | NLM_F_APPEND);
364 switch (rc->rc_cmd) {
365 case RTM_ADD:
366 hdr->nlmsg_type = NL_RTM_NEWROUTE;
367 hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_EXCL;
368 break;
369 case RTM_CHANGE:
370 hdr->nlmsg_type = NL_RTM_NEWROUTE;
371 hdr->nlmsg_flags |= NLM_F_REPLACE;
372 break;
373 case RTM_DELETE:
374 hdr->nlmsg_type = NL_RTM_DELROUTE;
375 break;
376 }
377 dump_px(fibnum, hdr, rc->rc_rt, &rnd, &nw);
378 nlmsg_flush(&nw);
379 }
380
381 rtsock_callback_p->route_f(fibnum, rc);
382 }
383
384 static void
set_scope6(struct sockaddr * sa,struct ifnet * ifp)385 set_scope6(struct sockaddr *sa, struct ifnet *ifp)
386 {
387 #ifdef INET6
388 if (sa != NULL && sa->sa_family == AF_INET6 && ifp != NULL) {
389 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
390
391 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr))
392 in6_set_unicast_scopeid(&sa6->sin6_addr, if_getindex(ifp));
393 }
394 #endif
395 }
396
397 struct rta_mpath_nh {
398 struct sockaddr *gw;
399 struct ifnet *ifp;
400 uint8_t rtnh_flags;
401 uint8_t rtnh_weight;
402 };
403
404 #define _IN(_field) offsetof(struct rtnexthop, _field)
405 #define _OUT(_field) offsetof(struct rta_mpath_nh, _field)
406 const static struct nlattr_parser nla_p_rtnh[] = {
407 { .type = NL_RTA_GATEWAY, .off = _OUT(gw), .cb = nlattr_get_ip },
408 { .type = NL_RTA_VIA, .off = _OUT(gw), .cb = nlattr_get_ipvia },
409 };
410 const static struct nlfield_parser nlf_p_rtnh[] = {
411 { .off_in = _IN(rtnh_flags), .off_out = _OUT(rtnh_flags), .cb = nlf_get_u8 },
412 { .off_in = _IN(rtnh_hops), .off_out = _OUT(rtnh_weight), .cb = nlf_get_u8 },
413 { .off_in = _IN(rtnh_ifindex), .off_out = _OUT(ifp), .cb = nlf_get_ifpz },
414 };
415 #undef _IN
416 #undef _OUT
417
418 static bool
post_p_rtnh(void * _attrs,struct nl_pstate * npt __unused)419 post_p_rtnh(void *_attrs, struct nl_pstate *npt __unused)
420 {
421 struct rta_mpath_nh *attrs = (struct rta_mpath_nh *)_attrs;
422
423 set_scope6(attrs->gw, attrs->ifp);
424 return (true);
425 }
426 NL_DECLARE_PARSER_EXT(mpath_parser, struct rtnexthop, NULL, nlf_p_rtnh, nla_p_rtnh, post_p_rtnh);
427
428 struct rta_mpath {
429 u_int num_nhops;
430 struct rta_mpath_nh nhops[0];
431 };
432
433 static int
nlattr_get_multipath(struct nlattr * nla,struct nl_pstate * npt,const void * arg,void * target)434 nlattr_get_multipath(struct nlattr *nla, struct nl_pstate *npt,
435 const void *arg, void *target)
436 {
437 struct rta_mpath *mp;
438 struct rtnexthop *rtnh;
439 uint16_t data_len, len;
440 u_int max_nhops;
441 int error;
442
443 data_len = nla->nla_len - sizeof(struct nlattr);
444 max_nhops = data_len / sizeof(struct rtnexthop);
445
446 mp = npt_alloc(npt, (max_nhops + 2) * sizeof(struct rta_mpath_nh));
447 mp->num_nhops = 0;
448
449 for (rtnh = (struct rtnexthop *)(nla + 1); data_len > 0; ) {
450 struct rta_mpath_nh *mpnh;
451
452 if (__predict_false(rtnh->rtnh_len <= sizeof(*rtnh) ||
453 rtnh->rtnh_len > data_len)) {
454 NLMSG_REPORT_ERR_MSG(npt, "%s: bad length %u",
455 __func__, rtnh->rtnh_len);
456 return (EINVAL);
457 }
458 mpnh = &mp->nhops[mp->num_nhops++];
459 error = nl_parse_header(rtnh, rtnh->rtnh_len, &mpath_parser,
460 npt, mpnh);
461 if (error != 0) {
462 NLMSG_REPORT_ERR_MSG(npt,
463 "RTA_MULTIPATH: nexthop %u: parse failed",
464 mp->num_nhops - 1);
465 return (error);
466 }
467 len = NL_ITEM_ALIGN(rtnh->rtnh_len);
468 data_len -= len;
469 rtnh = (struct rtnexthop *)((char *)rtnh + len);
470 }
471 if (data_len != 0 || mp->num_nhops == 0) {
472 NLMSG_REPORT_ERR_MSG(npt, "invalid RTA_MULTIPATH attr");
473 return (EINVAL);
474 }
475
476 *((struct rta_mpath **)target) = mp;
477 return (0);
478 }
479
480
481 struct nl_parsed_route {
482 struct sockaddr *rta_dst;
483 struct sockaddr *rta_gw;
484 struct ifnet *rta_oif;
485 struct rta_mpath *rta_multipath;
486 uint32_t rta_table;
487 uint32_t rta_rtflags;
488 uint32_t rta_nh_id;
489 uint32_t rta_weight;
490 uint32_t rtax_mtu;
491 uint8_t rtm_table;
492 uint8_t rtm_family;
493 uint8_t rtm_dst_len;
494 uint8_t rtm_protocol;
495 uint8_t rtm_type;
496 uint32_t rtm_flags;
497 };
498
499 #define _IN(_field) offsetof(struct rtmsg, _field)
500 #define _OUT(_field) offsetof(struct nl_parsed_route, _field)
501 static struct nlattr_parser nla_p_rtmetrics[] = {
502 { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = nlattr_get_uint32 },
503 };
504 NL_DECLARE_ATTR_PARSER(metrics_parser, nla_p_rtmetrics);
505
506 static const struct nlattr_parser nla_p_rtmsg[] = {
507 { .type = NL_RTA_DST, .off = _OUT(rta_dst), .cb = nlattr_get_ip },
508 { .type = NL_RTA_OIF, .off = _OUT(rta_oif), .cb = nlattr_get_ifp },
509 { .type = NL_RTA_GATEWAY, .off = _OUT(rta_gw), .cb = nlattr_get_ip },
510 { .type = NL_RTA_METRICS, .arg = &metrics_parser, .cb = nlattr_get_nested },
511 { .type = NL_RTA_MULTIPATH, .off = _OUT(rta_multipath), .cb = nlattr_get_multipath },
512 { .type = NL_RTA_WEIGHT, .off = _OUT(rta_weight), .cb = nlattr_get_uint32 },
513 { .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = nlattr_get_uint32 },
514 { .type = NL_RTA_TABLE, .off = _OUT(rta_table), .cb = nlattr_get_uint32 },
515 { .type = NL_RTA_VIA, .off = _OUT(rta_gw), .cb = nlattr_get_ipvia },
516 { .type = NL_RTA_NH_ID, .off = _OUT(rta_nh_id), .cb = nlattr_get_uint32 },
517 };
518
519 static const struct nlfield_parser nlf_p_rtmsg[] = {
520 { .off_in = _IN(rtm_family), .off_out = _OUT(rtm_family), .cb = nlf_get_u8 },
521 { .off_in = _IN(rtm_dst_len), .off_out = _OUT(rtm_dst_len), .cb = nlf_get_u8 },
522 { .off_in = _IN(rtm_protocol), .off_out = _OUT(rtm_protocol), .cb = nlf_get_u8 },
523 { .off_in = _IN(rtm_type), .off_out = _OUT(rtm_type), .cb = nlf_get_u8 },
524 { .off_in = _IN(rtm_table), .off_out = _OUT(rtm_table), .cb = nlf_get_u8 },
525 { .off_in = _IN(rtm_flags), .off_out = _OUT(rtm_flags), .cb = nlf_get_u32 },
526 };
527 #undef _IN
528 #undef _OUT
529
530 static bool
post_p_rtmsg(void * _attrs,struct nl_pstate * npt __unused)531 post_p_rtmsg(void *_attrs, struct nl_pstate *npt __unused)
532 {
533 struct nl_parsed_route *attrs = (struct nl_parsed_route *)_attrs;
534
535 set_scope6(attrs->rta_dst, attrs->rta_oif);
536 set_scope6(attrs->rta_gw, attrs->rta_oif);
537 return (true);
538 }
539 NL_DECLARE_PARSER_EXT(rtm_parser, struct rtmsg, NULL, nlf_p_rtmsg, nla_p_rtmsg, post_p_rtmsg);
540
541 struct netlink_walkargs {
542 struct nl_writer *nw;
543 struct route_nhop_data rnd;
544 struct nlmsghdr hdr;
545 struct nlpcb *nlp;
546 uint32_t fibnum;
547 int family;
548 int error;
549 int count;
550 int dumped;
551 int dumped_tables;
552 };
553
554 static int
dump_rtentry(struct rtentry * rt,void * _arg)555 dump_rtentry(struct rtentry *rt, void *_arg)
556 {
557 struct netlink_walkargs *wa = (struct netlink_walkargs *)_arg;
558 int error;
559
560 wa->count++;
561 if (wa->error != 0)
562 return (0);
563 if (!rt_is_exportable(rt, nlp_get_cred(wa->nlp)))
564 return (0);
565 wa->dumped++;
566
567 rt_get_rnd(rt, &wa->rnd);
568
569 error = dump_px(wa->fibnum, &wa->hdr, rt, &wa->rnd, wa->nw);
570
571 IF_DEBUG_LEVEL(LOG_DEBUG3) {
572 char rtbuf[INET6_ADDRSTRLEN + 5];
573 FIB_LOG(LOG_DEBUG3, wa->fibnum, wa->family,
574 "Dump %s, error %d",
575 rt_print_buf(rt, rtbuf, sizeof(rtbuf)), 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 }
596
597 static int
dump_rtable_fib(struct netlink_walkargs * wa,uint32_t fibnum,int family)598 dump_rtable_fib(struct netlink_walkargs *wa, uint32_t fibnum, int family)
599 {
600 wa->fibnum = fibnum;
601
602 if (family == AF_UNSPEC) {
603 for (int i = 0; i < AF_MAX; i++) {
604 if (rt_tables_get_rnh(fibnum, i) != 0) {
605 wa->family = i;
606 dump_rtable_one(wa, fibnum, i);
607 if (wa->error != 0)
608 break;
609 }
610 }
611 } else {
612 if (rt_tables_get_rnh(fibnum, family) != 0) {
613 wa->family = family;
614 dump_rtable_one(wa, fibnum, family);
615 }
616 }
617
618 return (wa->error);
619 }
620
621 static int
handle_rtm_getroute(struct nlpcb * nlp,struct nl_parsed_route * attrs,struct nlmsghdr * hdr,struct nl_pstate * npt)622 handle_rtm_getroute(struct nlpcb *nlp, struct nl_parsed_route *attrs,
623 struct nlmsghdr *hdr, struct nl_pstate *npt)
624 {
625 RIB_RLOCK_TRACKER;
626 struct rib_head *rnh;
627 const struct rtentry *rt;
628 struct route_nhop_data rnd;
629 uint32_t fibnum = attrs->rta_table;
630 sa_family_t family = attrs->rtm_family;
631
632 if (attrs->rta_dst == NULL) {
633 NLMSG_REPORT_ERR_MSG(npt, "No RTA_DST supplied");
634 return (EINVAL);
635 }
636
637 rnh = rt_tables_get_rnh(fibnum, family);
638 if (rnh == NULL)
639 return (EAFNOSUPPORT);
640
641 RIB_RLOCK(rnh);
642
643 struct sockaddr *dst = attrs->rta_dst;
644
645 if (attrs->rtm_flags & RTM_F_PREFIX)
646 rt = rib_lookup_prefix_plen(rnh, dst, attrs->rtm_dst_len, &rnd);
647 else
648 rt = (const struct rtentry *)rnh->rnh_matchaddr(dst, &rnh->head);
649 if (rt == NULL) {
650 RIB_RUNLOCK(rnh);
651 return (ESRCH);
652 }
653
654 rt_get_rnd(rt, &rnd);
655 rnd.rnd_nhop = nhop_select_func(rnd.rnd_nhop, 0);
656
657 RIB_RUNLOCK(rnh);
658
659 if (!rt_is_exportable(rt, nlp_get_cred(nlp)))
660 return (ESRCH);
661
662 IF_DEBUG_LEVEL(LOG_DEBUG2) {
663 char rtbuf[NHOP_PRINT_BUFSIZE] __unused, nhbuf[NHOP_PRINT_BUFSIZE] __unused;
664 FIB_LOG(LOG_DEBUG2, fibnum, family, "getroute completed: got %s for %s",
665 nhop_print_buf_any(rnd.rnd_nhop, nhbuf, sizeof(nhbuf)),
666 rt_print_buf(rt, rtbuf, sizeof(rtbuf)));
667 }
668
669 hdr->nlmsg_type = NL_RTM_NEWROUTE;
670 dump_px(fibnum, hdr, rt, &rnd, npt->nw);
671
672 return (0);
673 }
674
675 static int
handle_rtm_dump(struct nlpcb * nlp,uint32_t fibnum,int family,struct nlmsghdr * hdr,struct nl_writer * nw)676 handle_rtm_dump(struct nlpcb *nlp, uint32_t fibnum, int family,
677 struct nlmsghdr *hdr, struct nl_writer *nw)
678 {
679 struct netlink_walkargs wa = {
680 .nlp = nlp,
681 .nw = nw,
682 .hdr.nlmsg_pid = hdr->nlmsg_pid,
683 .hdr.nlmsg_seq = hdr->nlmsg_seq,
684 .hdr.nlmsg_type = NL_RTM_NEWROUTE,
685 .hdr.nlmsg_flags = hdr->nlmsg_flags | NLM_F_MULTI,
686 };
687
688 if (fibnum == RT_TABLE_UNSPEC) {
689 for (int i = 0; i < V_rt_numfibs; i++) {
690 dump_rtable_fib(&wa, fibnum, family);
691 if (wa.error != 0)
692 break;
693 }
694 } else
695 dump_rtable_fib(&wa, fibnum, family);
696
697 if (wa.error == 0 && wa.dumped_tables == 0) {
698 FIB_LOG(LOG_DEBUG, fibnum, family, "incorrect fibnum/family");
699 wa.error = ESRCH;
700 // How do we propagate it?
701 }
702
703 if (!nlmsg_end_dump(wa.nw, wa.error, &wa.hdr)) {
704 NL_LOG(LOG_DEBUG, "Unable to finalize the dump");
705 return (ENOMEM);
706 }
707
708 return (wa.error);
709 }
710
711 static struct nhop_object *
finalize_nhop(struct nhop_object * nh,const struct sockaddr * dst,int * perror)712 finalize_nhop(struct nhop_object *nh, const struct sockaddr *dst, int *perror)
713 {
714 /*
715 * The following MUST be filled:
716 * nh_ifp, nh_ifa, nh_gw
717 */
718 if (nh->gw_sa.sa_family == 0) {
719 /*
720 * Empty gateway. Can be direct route with RTA_OIF set.
721 */
722 if (nh->nh_ifp != NULL)
723 nhop_set_direct_gw(nh, nh->nh_ifp);
724 else {
725 NL_LOG(LOG_DEBUG, "empty gateway and interface, skipping");
726 *perror = EINVAL;
727 return (NULL);
728 }
729 /* Both nh_ifp and gateway are set */
730 } else {
731 /* Gateway is set up, we can derive ifp if not set */
732 if (nh->nh_ifp == NULL) {
733 uint32_t fibnum = nhop_get_fibnum(nh);
734 uint32_t flags = 0;
735
736 if (nh->nh_flags & NHF_GATEWAY)
737 flags = RTF_GATEWAY;
738 else if (nh->nh_flags & NHF_HOST)
739 flags = RTF_HOST;
740
741 struct ifaddr *ifa = ifa_ifwithroute(flags, dst, &nh->gw_sa, fibnum);
742 if (ifa == NULL) {
743 NL_LOG(LOG_DEBUG, "Unable to determine ifp, skipping");
744 *perror = EINVAL;
745 return (NULL);
746 }
747 nhop_set_transmit_ifp(nh, ifa->ifa_ifp);
748 }
749 }
750 /* Both nh_ifp and gateway are set */
751 if (nh->nh_ifa == NULL) {
752 const struct sockaddr *gw_sa = &nh->gw_sa;
753
754 if (gw_sa->sa_family != dst->sa_family) {
755 /*
756 * Use dst as the target for determining the default
757 * preferred ifa IF
758 * 1) the gateway is link-level (e.g. direct route)
759 * 2) the gateway family is different (e.g. IPv4 over IPv6).
760 */
761 gw_sa = dst;
762 }
763
764 struct ifaddr *ifa = ifaof_ifpforaddr(gw_sa, nh->nh_ifp);
765 if (ifa == NULL) {
766 /* Try link-level ifa. */
767 gw_sa = &nh->gw_sa;
768 ifa = ifaof_ifpforaddr(gw_sa, nh->nh_ifp);
769 if (ifa == NULL) {
770 NL_LOG(LOG_DEBUG, "Unable to determine ifa, skipping");
771 *perror = EINVAL;
772 return (NULL);
773 }
774 }
775 nhop_set_src(nh, ifa);
776 }
777
778 return (nhop_get_nhop(nh, perror));
779 }
780
781 static int
get_pxflag(const struct nl_parsed_route * attrs)782 get_pxflag(const struct nl_parsed_route *attrs)
783 {
784 int pxflag = 0;
785 switch (attrs->rtm_family) {
786 case AF_INET:
787 if (attrs->rtm_dst_len == 32)
788 pxflag = NHF_HOST;
789 else if (attrs->rtm_dst_len == 0)
790 pxflag = NHF_DEFAULT;
791 break;
792 case AF_INET6:
793 if (attrs->rtm_dst_len == 128)
794 pxflag = NHF_HOST;
795 else if (attrs->rtm_dst_len == 0)
796 pxflag = NHF_DEFAULT;
797 break;
798 }
799
800 return (pxflag);
801 }
802
803 static int
get_op_flags(int nlm_flags)804 get_op_flags(int nlm_flags)
805 {
806 int op_flags = 0;
807
808 op_flags |= (nlm_flags & NLM_F_REPLACE) ? RTM_F_REPLACE : 0;
809 op_flags |= (nlm_flags & NLM_F_EXCL) ? RTM_F_EXCL : 0;
810 op_flags |= (nlm_flags & NLM_F_CREATE) ? RTM_F_CREATE : 0;
811 op_flags |= (nlm_flags & NLM_F_APPEND) ? RTM_F_APPEND : 0;
812
813 return (op_flags);
814 }
815
816 #ifdef ROUTE_MPATH
817 static int
create_nexthop_one(struct nl_parsed_route * attrs,struct rta_mpath_nh * mpnh,struct nl_pstate * npt,struct nhop_object ** pnh)818 create_nexthop_one(struct nl_parsed_route *attrs, struct rta_mpath_nh *mpnh,
819 struct nl_pstate *npt, struct nhop_object **pnh)
820 {
821 int error;
822
823 if (mpnh->gw == NULL)
824 return (EINVAL);
825
826 struct nhop_object *nh = nhop_alloc(attrs->rta_table, attrs->rtm_family);
827 if (nh == NULL)
828 return (ENOMEM);
829
830 error = nl_set_nexthop_gw(nh, mpnh->gw, mpnh->ifp, npt);
831 if (error != 0) {
832 nhop_free(nh);
833 return (error);
834 }
835 if (mpnh->ifp != NULL)
836 nhop_set_transmit_ifp(nh, mpnh->ifp);
837 nhop_set_pxtype_flag(nh, get_pxflag(attrs));
838 nhop_set_rtflags(nh, attrs->rta_rtflags);
839 if (attrs->rtm_protocol > RTPROT_STATIC)
840 nhop_set_origin(nh, attrs->rtm_protocol);
841
842 *pnh = finalize_nhop(nh, attrs->rta_dst, &error);
843
844 return (error);
845 }
846 #endif
847
848 static struct nhop_object *
create_nexthop_from_attrs(struct nl_parsed_route * attrs,struct nl_pstate * npt,int * perror)849 create_nexthop_from_attrs(struct nl_parsed_route *attrs,
850 struct nl_pstate *npt, int *perror)
851 {
852 struct nhop_object *nh = NULL;
853 int error = 0;
854
855 if (attrs->rta_multipath != NULL) {
856 #ifdef ROUTE_MPATH
857 /* Multipath w/o explicit nexthops */
858 int num_nhops = attrs->rta_multipath->num_nhops;
859 struct weightened_nhop *wn = npt_alloc(npt, sizeof(*wn) * num_nhops);
860
861 for (int i = 0; i < num_nhops; i++) {
862 struct rta_mpath_nh *mpnh = &attrs->rta_multipath->nhops[i];
863
864 error = create_nexthop_one(attrs, mpnh, npt, &wn[i].nh);
865 if (error != 0) {
866 for (int j = 0; j < i; j++)
867 nhop_free(wn[j].nh);
868 break;
869 }
870 wn[i].weight = mpnh->rtnh_weight > 0 ? mpnh->rtnh_weight : 1;
871 }
872 if (error == 0) {
873 struct rib_head *rh = nhop_get_rh(wn[0].nh);
874 struct nhgrp_object *nhg;
875
876 nhg = nhgrp_alloc(rh->rib_fibnum, rh->rib_family,
877 wn, num_nhops, perror);
878 if (nhg != NULL) {
879 if (attrs->rtm_protocol > RTPROT_STATIC)
880 nhgrp_set_origin(nhg, attrs->rtm_protocol);
881 nhg = nhgrp_get_nhgrp(nhg, perror);
882 }
883 for (int i = 0; i < num_nhops; i++)
884 nhop_free(wn[i].nh);
885 if (nhg != NULL)
886 return ((struct nhop_object *)nhg);
887 error = *perror;
888 }
889 #else
890 error = ENOTSUP;
891 #endif
892 *perror = error;
893 } else {
894 nh = nhop_alloc(attrs->rta_table, attrs->rtm_family);
895 if (nh == NULL) {
896 *perror = ENOMEM;
897 return (NULL);
898 }
899 if (attrs->rta_gw != NULL) {
900 *perror = nl_set_nexthop_gw(nh, attrs->rta_gw, attrs->rta_oif, npt);
901 if (*perror != 0) {
902 nhop_free(nh);
903 return (NULL);
904 }
905 }
906 if (attrs->rta_oif != NULL)
907 nhop_set_transmit_ifp(nh, attrs->rta_oif);
908 if (attrs->rtax_mtu != 0)
909 nhop_set_mtu(nh, attrs->rtax_mtu, true);
910 if (attrs->rta_rtflags & RTF_BROADCAST)
911 nhop_set_broadcast(nh, true);
912 if (attrs->rtm_protocol > RTPROT_STATIC)
913 nhop_set_origin(nh, attrs->rtm_protocol);
914 nhop_set_pxtype_flag(nh, get_pxflag(attrs));
915 nhop_set_rtflags(nh, attrs->rta_rtflags);
916
917 switch (attrs->rtm_type) {
918 case RTN_UNICAST:
919 break;
920 case RTN_BLACKHOLE:
921 nhop_set_blackhole(nh, RTF_BLACKHOLE);
922 break;
923 case RTN_PROHIBIT:
924 case RTN_UNREACHABLE:
925 nhop_set_blackhole(nh, RTF_REJECT);
926 break;
927 /* TODO: return ENOTSUP for other types if strict option is set */
928 }
929
930 nh = finalize_nhop(nh, attrs->rta_dst, perror);
931 }
932
933 return (nh);
934 }
935
936 static int
rtnl_handle_newroute(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)937 rtnl_handle_newroute(struct nlmsghdr *hdr, struct nlpcb *nlp,
938 struct nl_pstate *npt)
939 {
940 struct rib_cmd_info rc = {};
941 struct nhop_object *nh = NULL;
942 int error;
943
944 struct nl_parsed_route attrs = {};
945 error = nl_parse_nlmsg(hdr, &rtm_parser, npt, &attrs);
946 if (error != 0)
947 return (error);
948
949 /* Check if we have enough data */
950 if (attrs.rta_dst == NULL) {
951 NL_LOG(LOG_DEBUG, "missing RTA_DST");
952 return (EINVAL);
953 }
954
955 /* pre-2.6.19 Linux API compatibility */
956 if (attrs.rtm_table > 0 && attrs.rta_table == 0)
957 attrs.rta_table = attrs.rtm_table;
958 if (attrs.rta_table >= V_rt_numfibs || attrs.rtm_family > AF_MAX) {
959 NLMSG_REPORT_ERR_MSG(npt, "invalid fib");
960 return (EINVAL);
961 }
962
963 if (attrs.rta_nh_id != 0) {
964 /* Referenced uindex */
965 int pxflag = get_pxflag(&attrs);
966 nh = nl_find_nhop(attrs.rta_table, attrs.rtm_family, attrs.rta_nh_id,
967 pxflag, &error);
968 if (error != 0)
969 return (error);
970 } else {
971 nh = create_nexthop_from_attrs(&attrs, npt, &error);
972 if (error != 0) {
973 NL_LOG(LOG_DEBUG, "Error creating nexthop");
974 return (error);
975 }
976 }
977
978 if (!NH_IS_NHGRP(nh) && attrs.rta_weight == 0)
979 attrs.rta_weight = RT_DEFAULT_WEIGHT;
980 struct route_nhop_data rnd = { .rnd_nhop = nh, .rnd_weight = attrs.rta_weight };
981 int op_flags = get_op_flags(hdr->nlmsg_flags);
982
983 error = rib_add_route_px(attrs.rta_table, attrs.rta_dst, attrs.rtm_dst_len,
984 &rnd, op_flags, &rc);
985 if (error == 0)
986 report_operation(attrs.rta_table, &rc, nlp, hdr);
987 return (error);
988 }
989
990 static int
path_match_func(const struct rtentry * rt,const struct nhop_object * nh,void * _data)991 path_match_func(const struct rtentry *rt, const struct nhop_object *nh, void *_data)
992 {
993 struct nl_parsed_route *attrs = (struct nl_parsed_route *)_data;
994
995 if ((attrs->rta_gw != NULL) && !rib_match_gw(rt, nh, attrs->rta_gw))
996 return (0);
997
998 if ((attrs->rta_oif != NULL) && (attrs->rta_oif != nh->nh_ifp))
999 return (0);
1000
1001 return (1);
1002 }
1003
1004 static int
rtnl_handle_delroute(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)1005 rtnl_handle_delroute(struct nlmsghdr *hdr, struct nlpcb *nlp,
1006 struct nl_pstate *npt)
1007 {
1008 struct rib_cmd_info rc;
1009 int error;
1010
1011 struct nl_parsed_route attrs = {};
1012 error = nl_parse_nlmsg(hdr, &rtm_parser, npt, &attrs);
1013 if (error != 0)
1014 return (error);
1015
1016 if (attrs.rta_dst == NULL) {
1017 NLMSG_REPORT_ERR_MSG(npt, "RTA_DST is not set");
1018 return (ESRCH);
1019 }
1020
1021 if (attrs.rta_table >= V_rt_numfibs || attrs.rtm_family > AF_MAX) {
1022 NLMSG_REPORT_ERR_MSG(npt, "invalid fib");
1023 return (EINVAL);
1024 }
1025
1026 error = rib_del_route_px(attrs.rta_table, attrs.rta_dst,
1027 attrs.rtm_dst_len, path_match_func, &attrs,
1028 (attrs.rta_rtflags & RTF_PINNED) ? RTM_F_FORCE : 0, &rc);
1029 if (error == 0)
1030 report_operation(attrs.rta_table, &rc, nlp, hdr);
1031 return (error);
1032 }
1033
1034 static int
rtnl_handle_getroute(struct nlmsghdr * hdr,struct nlpcb * nlp,struct nl_pstate * npt)1035 rtnl_handle_getroute(struct nlmsghdr *hdr, struct nlpcb *nlp, struct nl_pstate *npt)
1036 {
1037 int error;
1038
1039 struct nl_parsed_route attrs = {};
1040 error = nl_parse_nlmsg(hdr, &rtm_parser, npt, &attrs);
1041 if (error != 0)
1042 return (error);
1043
1044 if (attrs.rta_table >= V_rt_numfibs || attrs.rtm_family > AF_MAX) {
1045 NLMSG_REPORT_ERR_MSG(npt, "invalid fib");
1046 return (EINVAL);
1047 }
1048
1049 if (hdr->nlmsg_flags & NLM_F_DUMP)
1050 error = handle_rtm_dump(nlp, attrs.rta_table, attrs.rtm_family, hdr, npt->nw);
1051 else
1052 error = handle_rtm_getroute(nlp, &attrs, hdr, npt);
1053
1054 return (error);
1055 }
1056
1057 void
rtnl_handle_route_event(uint32_t fibnum,const struct rib_cmd_info * rc)1058 rtnl_handle_route_event(uint32_t fibnum, const struct rib_cmd_info *rc)
1059 {
1060 struct nl_writer nw;
1061 int family, nlm_flags = 0;
1062
1063 family = rt_get_family(rc->rc_rt);
1064
1065 /* XXX: check if there are active listeners first */
1066
1067 /* TODO: consider passing PID/type/seq */
1068 switch (rc->rc_cmd) {
1069 case RTM_ADD:
1070 nlm_flags = NLM_F_EXCL | NLM_F_CREATE;
1071 break;
1072 case RTM_CHANGE:
1073 nlm_flags = NLM_F_REPLACE;
1074 break;
1075 case RTM_DELETE:
1076 nlm_flags = 0;
1077 break;
1078 }
1079 IF_DEBUG_LEVEL(LOG_DEBUG2) {
1080 char rtbuf[NHOP_PRINT_BUFSIZE] __unused;
1081 FIB_LOG(LOG_DEBUG2, fibnum, family,
1082 "received event %s for %s / nlm_flags=%X",
1083 rib_print_cmd(rc->rc_cmd),
1084 rt_print_buf(rc->rc_rt, rtbuf, sizeof(rtbuf)),
1085 nlm_flags);
1086 }
1087
1088 struct nlmsghdr hdr = {
1089 .nlmsg_flags = nlm_flags,
1090 .nlmsg_type = get_rtmsg_type_from_rtsock(rc->rc_cmd),
1091 };
1092
1093 struct route_nhop_data rnd = {
1094 .rnd_nhop = rc_get_nhop(rc),
1095 .rnd_weight = rc->rc_nh_weight,
1096 };
1097
1098 uint32_t group_id = family_to_group(family);
1099 if (!nl_writer_group(&nw, NLMSG_SMALL, NETLINK_ROUTE, group_id, 0,
1100 false)) {
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 .flags = RTNL_F_ALLOW_NONVNET_JAIL,
1122 },
1123 {
1124 .cmd = NL_RTM_NEWROUTE,
1125 .name = "RTM_NEWROUTE",
1126 .cb = &rtnl_handle_newroute,
1127 .priv = PRIV_NET_ROUTE,
1128 .flags = RTNL_F_ALLOW_NONVNET_JAIL,
1129 }
1130 };
1131
1132 static const struct nlhdr_parser *all_parsers[] = {&mpath_parser, &metrics_parser, &rtm_parser};
1133
1134 void
rtnl_routes_init(void)1135 rtnl_routes_init(void)
1136 {
1137 NL_VERIFY_PARSERS(all_parsers);
1138 rtnl_register_messages(cmd_handlers, nitems(cmd_handlers));
1139 }
1140