1 /* $OpenBSD: route.h,v 1.210 2024/03/31 15:53:12 bluhm Exp $ */
2 /* $NetBSD: route.h,v 1.9 1996/02/13 22:00:49 christos Exp $ */
3
4 /*
5 * Copyright (c) 1980, 1986, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)route.h 8.3 (Berkeley) 4/19/94
33 */
34
35 #ifndef _NET_ROUTE_H_
36 #define _NET_ROUTE_H_
37
38 /*
39 * Locks used to protect struct members in this file:
40 * I immutable after creation
41 * N net lock
42 * X exclusive net lock, or shared net lock + kernel lock
43 * R art (rtable) lock
44 * L arp/nd6/etc lock for updates, net lock for reads
45 * T rttimer_mtx route timer lists
46 */
47
48 /*
49 * Kernel resident routing tables.
50 *
51 * The routing tables are initialized when interface addresses
52 * are set by making entries for all directly connected interfaces.
53 */
54
55 #ifdef _KERNEL
56 /*
57 * These numbers are used by reliable protocols for determining
58 * retransmission behavior and are included in the routing structure.
59 */
60 struct rt_kmetrics {
61 u_int64_t rmx_pksent; /* packets sent using this route */
62 int64_t rmx_expire; /* lifetime for route, e.g. redirect */
63 u_int rmx_locks; /* Kernel must leave these values */
64 u_int rmx_mtu; /* MTU for this path */
65 };
66 #endif
67
68 /*
69 * Huge version for userland compatibility.
70 */
71 struct rt_metrics {
72 u_int64_t rmx_pksent; /* packets sent using this route */
73 int64_t rmx_expire; /* lifetime for route, e.g. redirect */
74 u_int rmx_locks; /* Kernel must leave these values */
75 u_int rmx_mtu; /* MTU for this path */
76 u_int rmx_refcnt; /* # references hold */
77 /* some apps may still need these no longer used metrics */
78 u_int rmx_hopcount; /* max hops expected */
79 u_int rmx_recvpipe; /* inbound delay-bandwidth product */
80 u_int rmx_sendpipe; /* outbound delay-bandwidth product */
81 u_int rmx_ssthresh; /* outbound gateway buffer limit */
82 u_int rmx_rtt; /* estimated round trip time */
83 u_int rmx_rttvar; /* estimated rtt variance */
84 u_int rmx_pad;
85 };
86
87 #ifdef _KERNEL
88 /*
89 * rmx_rtt and rmx_rttvar are stored as microseconds;
90 * RTTTOPRHZ(rtt) converts to a value suitable for use
91 * by a protocol slowtimo counter.
92 */
93 #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
94 #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
95
96 #include <sys/queue.h>
97 #include <net/rtable.h>
98
99 struct rttimer;
100
101 /*
102 * We distinguish between routes to hosts and routes to networks,
103 * preferring the former if available. For each route we infer
104 * the interface to use from the gateway address supplied when
105 * the route was entered. Routes that forward packets through
106 * gateways are marked with RTF_GATEWAY so that the output routines
107 * know to address the gateway rather than the ultimate destination.
108 *
109 * How the RT_gw union is used also depends on RTF_GATEWAY. With
110 * RTF_GATEWAY set, rt_gwroute points at the rtentry for the rt_gateway
111 * address. If RTF_GATEWAY is not set, rt_cachecnt contains the
112 * number of RTF_GATEWAY rtentry structs with their rt_gwroute pointing
113 * at this rtentry.
114 */
115
116 struct rtentry {
117 struct sockaddr *rt_dest; /* [I] destination */
118 SRPL_ENTRY(rtentry) rt_next; /* [R] next mpath entry to our dst */
119 struct sockaddr *rt_gateway; /* [X] gateway address */
120 struct ifaddr *rt_ifa; /* [N] interface addr to use */
121 caddr_t rt_llinfo; /* [L] pointer to link level info or
122 an MPLS structure */
123 union {
124 struct rtentry *_nh; /* [X] rtentry for rt_gateway */
125 unsigned int _ref; /* [X] # gateway rtentry refs */
126 } RT_gw;
127 #define rt_gwroute RT_gw._nh
128 #define rt_cachecnt RT_gw._ref
129 struct rtentry *rt_parent; /* [N] if cloned, parent rtentry */
130 LIST_HEAD(, rttimer) rt_timer; /* queue of timeouts for misc funcs */
131 struct rt_kmetrics rt_rmx; /* metrics used by rx'ing protocols */
132 unsigned int rt_ifidx; /* [N] interface to use */
133 unsigned int rt_flags; /* [X] up/down?, host/net */
134 struct refcnt rt_refcnt; /* # held references */
135 int rt_plen; /* [I] prefix length */
136 uint16_t rt_labelid; /* [N] route label ID */
137 uint8_t rt_priority; /* [N] routing priority to use */
138 };
139 #define rt_use rt_rmx.rmx_pksent
140 #define rt_expire rt_rmx.rmx_expire
141 #define rt_locks rt_rmx.rmx_locks
142 #define rt_mtu rt_rmx.rmx_mtu
143
144 #endif /* _KERNEL */
145
146 /* bitmask values for rtm_flags */
147 #define RTF_UP 0x1 /* route usable */
148 #define RTF_GATEWAY 0x2 /* destination is a gateway */
149 #define RTF_HOST 0x4 /* host entry (net otherwise) */
150 #define RTF_REJECT 0x8 /* host or net unreachable */
151 #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
152 #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
153 #define RTF_DONE 0x40 /* message confirmed */
154 #define RTF_CLONING 0x100 /* generate new routes on use */
155 #define RTF_MULTICAST 0x200 /* route associated to a mcast addr. */
156 #define RTF_LLINFO 0x400 /* generated by ARP or ND */
157 #define RTF_STATIC 0x800 /* manually added */
158 #define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
159 #define RTF_PROTO3 0x2000 /* protocol specific routing flag */
160 #define RTF_PROTO2 0x4000 /* protocol specific routing flag */
161 #define RTF_ANNOUNCE RTF_PROTO2 /* announce L2 entry */
162 #define RTF_PROTO1 0x8000 /* protocol specific routing flag */
163 #define RTF_CLONED 0x10000 /* this is a cloned route */
164 #define RTF_CACHED 0x20000 /* cached by a RTF_GATEWAY entry */
165 #define RTF_MPATH 0x40000 /* multipath route or operation */
166 #define RTF_MPLS 0x100000 /* MPLS additional infos */
167 #define RTF_LOCAL 0x200000 /* route to a local address */
168 #define RTF_BROADCAST 0x400000 /* route associated to a bcast addr. */
169 #define RTF_CONNECTED 0x800000 /* interface route */
170 #define RTF_BFD 0x1000000 /* Link state controlled by BFD */
171
172 /* mask of RTF flags that are allowed to be modified by RTM_CHANGE */
173 #define RTF_FMASK \
174 (RTF_LLINFO | RTF_PROTO1 | RTF_PROTO2 | RTF_PROTO3 | RTF_BLACKHOLE | \
175 RTF_REJECT | RTF_STATIC | RTF_MPLS | RTF_BFD)
176
177 /* Routing priorities used by the different routing protocols */
178 #define RTP_NONE 0 /* unset priority use sane default */
179 #define RTP_LOCAL 1 /* local address routes (must be the highest) */
180 #define RTP_CONNECTED 4 /* directly connected routes */
181 #define RTP_STATIC 8 /* static routes base priority */
182 #define RTP_EIGRP 28 /* EIGRP routes */
183 #define RTP_OSPF 32 /* OSPF routes */
184 #define RTP_ISIS 36 /* IS-IS routes */
185 #define RTP_RIP 40 /* RIP routes */
186 #define RTP_BGP 48 /* BGP routes */
187 #define RTP_DEFAULT 56 /* routes that have nothing set */
188 #define RTP_PROPOSAL_STATIC 57
189 #define RTP_PROPOSAL_DHCLIENT 58
190 #define RTP_PROPOSAL_SLAAC 59
191 #define RTP_PROPOSAL_UMB 60
192 #define RTP_PROPOSAL_PPP 61
193 #define RTP_PROPOSAL_SOLICIT 62 /* request reply of all RTM_PROPOSAL */
194 #define RTP_MAX 63 /* maximum priority */
195 #define RTP_ANY 64 /* any of the above */
196 #define RTP_MASK 0x7f
197 #define RTP_DOWN 0x80 /* route/link is down */
198
199 /*
200 * Routing statistics.
201 */
202 struct rtstat {
203 u_int32_t rts_badredirect; /* bogus redirect calls */
204 u_int32_t rts_dynamic; /* routes created by redirects */
205 u_int32_t rts_newgateway; /* routes modified by redirects */
206 u_int32_t rts_unreach; /* lookups which failed */
207 u_int32_t rts_wildcard; /* lookups satisfied by a wildcard */
208 };
209
210 /*
211 * Routing Table Info.
212 */
213 struct rt_tableinfo {
214 u_short rti_tableid; /* routing table id */
215 u_short rti_domainid; /* routing domain id */
216 };
217
218 /*
219 * Structures for routing messages.
220 */
221 struct rt_msghdr {
222 u_short rtm_msglen; /* to skip over non-understood messages */
223 u_char rtm_version; /* future binary compatibility */
224 u_char rtm_type; /* message type */
225 u_short rtm_hdrlen; /* sizeof(rt_msghdr) to skip over the header */
226 u_short rtm_index; /* index for associated ifp */
227 u_short rtm_tableid; /* routing table id */
228 u_char rtm_priority; /* routing priority */
229 u_char rtm_mpls; /* MPLS additional infos */
230 int rtm_addrs; /* bitmask identifying sockaddrs in msg */
231 int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
232 int rtm_fmask; /* bitmask used in RTM_CHANGE message */
233 pid_t rtm_pid; /* identify sender */
234 int rtm_seq; /* for sender to identify action */
235 int rtm_errno; /* why failed */
236 u_int rtm_inits; /* which metrics we are initializing */
237 struct rt_metrics rtm_rmx; /* metrics themselves */
238 };
239 /* overload no longer used field */
240 #define rtm_use rtm_rmx.rmx_pksent
241
242 #define RTM_VERSION 5 /* Up the ante and ignore older versions */
243
244 #define RTM_MAXSIZE 2048 /* Maximum size of an accepted route msg */
245
246 /* values for rtm_type */
247 #define RTM_ADD 0x1 /* Add Route */
248 #define RTM_DELETE 0x2 /* Delete Route */
249 #define RTM_CHANGE 0x3 /* Change Metrics or flags */
250 #define RTM_GET 0x4 /* Report Metrics */
251 #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
252 #define RTM_REDIRECT 0x6 /* Told to use different route */
253 #define RTM_MISS 0x7 /* Lookup failed on this address */
254 #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
255 #define RTM_NEWADDR 0xc /* address being added to iface */
256 #define RTM_DELADDR 0xd /* address being removed from iface */
257 #define RTM_IFINFO 0xe /* iface going up/down etc. */
258 #define RTM_IFANNOUNCE 0xf /* iface arrival/departure */
259 #define RTM_DESYNC 0x10 /* route socket buffer overflow */
260 #define RTM_INVALIDATE 0x11 /* Invalidate cache of L2 route */
261 #define RTM_BFD 0x12 /* bidirectional forwarding detection */
262 #define RTM_PROPOSAL 0x13 /* proposal for resolvd(8) */
263 #define RTM_CHGADDRATTR 0x14 /* address attribute change */
264 #define RTM_80211INFO 0x15 /* 80211 iface change */
265 #define RTM_SOURCE 0x16 /* set source address */
266
267 #define RTV_MTU 0x1 /* init or lock _mtu */
268 #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
269 #define RTV_EXPIRE 0x4 /* init or lock _expire */
270 #define RTV_RPIPE 0x8 /* init or lock _recvpipe */
271 #define RTV_SPIPE 0x10 /* init or lock _sendpipe */
272 #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
273 #define RTV_RTT 0x40 /* init or lock _rtt */
274 #define RTV_RTTVAR 0x80 /* init or lock _rttvar */
275
276 /*
277 * Bitmask values for rtm_addrs.
278 */
279 #define RTA_DST 0x1 /* destination sockaddr present */
280 #define RTA_GATEWAY 0x2 /* gateway sockaddr present */
281 #define RTA_NETMASK 0x4 /* netmask sockaddr present */
282 #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
283 #define RTA_IFP 0x10 /* interface name sockaddr present */
284 #define RTA_IFA 0x20 /* interface addr sockaddr present */
285 #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
286 #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
287 #define RTA_SRC 0x100 /* source sockaddr present */
288 #define RTA_SRCMASK 0x200 /* source netmask present */
289 #define RTA_LABEL 0x400 /* route label present */
290 #define RTA_BFD 0x800 /* bfd present */
291 #define RTA_DNS 0x1000 /* DNS Servers sockaddr present */
292 #define RTA_STATIC 0x2000 /* RFC 3442 encoded static routes present */
293 #define RTA_SEARCH 0x4000 /* RFC 3397 encoded search path present */
294
295 /*
296 * Index offsets for sockaddr array for alternate internal encoding.
297 */
298 #define RTAX_DST 0 /* destination sockaddr present */
299 #define RTAX_GATEWAY 1 /* gateway sockaddr present */
300 #define RTAX_NETMASK 2 /* netmask sockaddr present */
301 #define RTAX_GENMASK 3 /* cloning mask sockaddr present */
302 #define RTAX_IFP 4 /* interface name sockaddr present */
303 #define RTAX_IFA 5 /* interface addr sockaddr present */
304 #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
305 #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
306 #define RTAX_SRC 8 /* source sockaddr present */
307 #define RTAX_SRCMASK 9 /* source netmask present */
308 #define RTAX_LABEL 10 /* route label present */
309 #define RTAX_BFD 11 /* bfd present */
310 #define RTAX_DNS 12 /* DNS Server(s) sockaddr present */
311 #define RTAX_STATIC 13 /* RFC 3442 encoded static routes present */
312 #define RTAX_SEARCH 14 /* RFC 3397 encoded search path present */
313 #define RTAX_MAX 15 /* size of array to allocate */
314
315 /*
316 * setsockopt defines used for the filtering.
317 */
318 #define ROUTE_MSGFILTER 1 /* bitmask to specify which types should be
319 sent to the client. */
320 #define ROUTE_TABLEFILTER 2 /* change routing table the socket is listening
321 on, RTABLE_ANY listens on all tables. */
322 #define ROUTE_PRIOFILTER 3 /* only pass updates with a priority higher or
323 equal (actual value lower) to the specified
324 priority. */
325 #define ROUTE_FLAGFILTER 4 /* do not pass updates for routes with flags
326 in this bitmask. */
327
328 #define ROUTE_FILTER(m) (1 << (m))
329 #define RTABLE_ANY 0xffffffff
330
331 #define RTLABEL_LEN 32
332
333 struct sockaddr_rtlabel {
334 u_int8_t sr_len; /* total length */
335 sa_family_t sr_family; /* address family */
336 char sr_label[RTLABEL_LEN];
337 };
338
339 #define RTDNS_LEN 128
340
341 struct sockaddr_rtdns {
342 u_int8_t sr_len; /* total length */
343 sa_family_t sr_family; /* address family */
344 char sr_dns[RTDNS_LEN];
345 };
346
347 #ifdef _KERNEL
348
349 static inline struct sockaddr *
srtdnstosa(struct sockaddr_rtdns * sdns)350 srtdnstosa(struct sockaddr_rtdns *sdns)
351 {
352 return ((struct sockaddr *)(sdns));
353 }
354
355 #endif
356
357 #define RTSTATIC_LEN 128
358
359 struct sockaddr_rtstatic {
360 u_int8_t sr_len; /* total length */
361 sa_family_t sr_family; /* address family */
362 char sr_static[RTSTATIC_LEN];
363 };
364
365 #define RTSEARCH_LEN 128
366
367 struct sockaddr_rtsearch {
368 u_int8_t sr_len; /* total length */
369 sa_family_t sr_family; /* address family */
370 char sr_search[RTSEARCH_LEN];
371 };
372
373 struct rt_addrinfo {
374 int rti_addrs;
375 const struct sockaddr *rti_info[RTAX_MAX];
376 int rti_flags;
377 struct ifaddr *rti_ifa;
378 struct rt_msghdr *rti_rtm;
379 u_char rti_mpls;
380 };
381
382 #ifdef __BSD_VISIBLE
383
384 #include <netinet/in.h>
385
386 /*
387 * A route consists of a destination address and a reference
388 * to a routing entry. These are often held by protocols
389 * in their control blocks, e.g. inpcb.
390 */
391 struct route {
392 struct rtentry *ro_rt;
393 u_long ro_generation;
394 u_long ro_tableid; /* u_long because of alignment */
395 union {
396 struct sockaddr ro_dstsa;
397 struct sockaddr_in ro_dstsin;
398 struct sockaddr_in6 ro_dstsin6;
399 };
400 union {
401 struct in_addr ro_srcin;
402 struct in6_addr ro_srcin6;
403 };
404 };
405
406 #endif /* __BSD_VISIBLE */
407
408 #ifdef _KERNEL
409
410 #include <sys/percpu.h>
411
412 enum rtstat_counters {
413 rts_badredirect, /* bogus redirect calls */
414 rts_dynamic, /* routes created by redirects */
415 rts_newgateway, /* routes modified by redirects */
416 rts_unreach, /* lookups which failed */
417 rts_wildcard, /* lookups satisfied by a wildcard */
418
419 rts_ncounters
420 };
421
422 static inline void
rtstat_inc(enum rtstat_counters c)423 rtstat_inc(enum rtstat_counters c)
424 {
425 extern struct cpumem *rtcounters;
426
427 counters_inc(rtcounters, c);
428 }
429
430 /*
431 * This structure, and the prototypes for the rt_timer_{init,remove_all,
432 * add,timer} functions all used with the kind permission of BSDI.
433 * These allow functions to be called for routes at specific times.
434 */
435 struct rttimer_queue {
436 TAILQ_HEAD(, rttimer) rtq_head; /* [T] */
437 LIST_ENTRY(rttimer_queue) rtq_link; /* [T] */
438 void (*rtq_func) /* [I] callback */
439 (struct rtentry *, u_int);
440 unsigned long rtq_count; /* [T] */
441 int rtq_timeout; /* [T] */
442 };
443
444 const char *rtlabel_id2name_locked(u_int16_t);
445 const char *rtlabel_id2name(u_int16_t, char *, size_t);
446 u_int16_t rtlabel_name2id(const char *);
447 struct sockaddr *rtlabel_id2sa(u_int16_t, struct sockaddr_rtlabel *);
448 void rtlabel_unref(u_int16_t);
449
450 /*
451 * Values for additional argument to rtalloc()
452 */
453 #define RT_RESOLVE 1
454
455 extern struct rtstat rtstat;
456 extern u_long rtgeneration;
457
458 struct mbuf;
459 struct socket;
460 struct ifnet;
461 struct sockaddr_in6;
462 struct if_ieee80211_data;
463 struct bfd_config;
464
465 void route_init(void);
466 int route_cache(struct route *, const struct in_addr *,
467 const struct in_addr *, u_int);
468 struct rtentry *route_mpath(struct route *, const struct in_addr *,
469 const struct in_addr *, u_int);
470 int route6_cache(struct route *, const struct in6_addr *,
471 const struct in6_addr *, u_int);
472 struct rtentry *route6_mpath(struct route *, const struct in6_addr *,
473 const struct in6_addr *, u_int);
474 void rtm_ifchg(struct ifnet *);
475 void rtm_ifannounce(struct ifnet *, int);
476 void rtm_bfd(struct bfd_config *);
477 void rtm_80211info(struct ifnet *, struct if_ieee80211_data *);
478 void rt_maskedcopy(struct sockaddr *,
479 struct sockaddr *, struct sockaddr *);
480 struct sockaddr *rt_plen2mask(struct rtentry *, struct sockaddr_in6 *);
481 void rtm_send(struct rtentry *, int, int, unsigned int);
482 void rtm_addr(int, struct ifaddr *);
483 void rtm_miss(int, struct rt_addrinfo *, int, uint8_t, u_int, int, u_int);
484 void rtm_proposal(struct ifnet *, struct rt_addrinfo *, int, uint8_t);
485 int rt_setgate(struct rtentry *, const struct sockaddr *, u_int);
486 struct rtentry *rt_getll(struct rtentry *);
487
488 void rt_timer_init(void);
489 int rt_timer_add(struct rtentry *,
490 struct rttimer_queue *, u_int);
491 void rt_timer_remove_all(struct rtentry *);
492 time_t rt_timer_get_expire(const struct rtentry *);
493 void rt_timer_queue_init(struct rttimer_queue *, int,
494 void(*)(struct rtentry *, u_int));
495 void rt_timer_queue_change(struct rttimer_queue *, int);
496 void rt_timer_queue_flush(struct rttimer_queue *);
497 unsigned long rt_timer_queue_count(struct rttimer_queue *);
498 void rt_timer_timer(void *);
499
500 int rt_mpls_set(struct rtentry *, const struct sockaddr *, uint8_t);
501 void rt_mpls_clear(struct rtentry *);
502
503 int rtisvalid(struct rtentry *);
504 int rt_hash(struct rtentry *, const struct sockaddr *, uint32_t *);
505 struct rtentry *rtalloc_mpath(const struct sockaddr *, uint32_t *, u_int);
506 struct rtentry *rtalloc(const struct sockaddr *, int, unsigned int);
507 void rtref(struct rtentry *);
508 void rtfree(struct rtentry *);
509
510 int rt_ifa_add(struct ifaddr *, int, struct sockaddr *, unsigned int);
511 int rt_ifa_del(struct ifaddr *, int, struct sockaddr *, unsigned int);
512 void rt_ifa_purge(struct ifaddr *);
513 int rt_ifa_addlocal(struct ifaddr *);
514 int rt_ifa_dellocal(struct ifaddr *);
515 void rtredirect(struct sockaddr *, struct sockaddr *, struct sockaddr *,
516 struct rtentry **, unsigned int);
517 int rtrequest(int, struct rt_addrinfo *, u_int8_t, struct rtentry **,
518 u_int);
519 int rtrequest_delete(struct rt_addrinfo *, u_int8_t, struct ifnet *,
520 struct rtentry **, u_int);
521 int rt_if_track(struct ifnet *);
522 int rt_if_linkstate_change(struct rtentry *, void *, u_int);
523 int rtdeletemsg(struct rtentry *, struct ifnet *, u_int);
524 #endif /* _KERNEL */
525
526 #endif /* _NET_ROUTE_H_ */
527