bsd/net/route.h

   1 /*
   2  * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1980, 1986, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)route.h     8.3 (Berkeley) 4/19/94
  61  * $FreeBSD: src/sys/net/route.h,v 1.36.2.1 2000/08/16 06:14:23 jayanth Exp $
  62  */
  63
  64 #ifndef _NET_ROUTE_H_
  65 #define _NET_ROUTE_H_
  66 #include <sys/appleapiopts.h>
  67 #include <stdint.h>
  68 #include <sys/types.h>
  69 #include <sys/socket.h>
  70
  71 /*
  72  * Kernel resident routing tables.
  73  *
  74  * The routing tables are initialized when interface addresses
  75  * are set by making entries for all directly connected interfaces.
  76  */
  77
  78 /*
  79  * A route consists of a destination address and a reference
  80  * to a routing entry.  These are often held by protocols
  81  * in their control blocks, e.g. inpcb.
  82  */
  83 #ifdef PRIVATE
  84 struct  rtentry;
  85 struct route {
  86         /*
  87          * N.B: struct route must begin with ro_rt and ro_flags
  88          * because the code does some casts of a 'struct route_in6 *'
  89          * to a 'struct route *'.
  90          */
  91         struct rtentry  *ro_rt;
  92         uint32_t        ro_flags;       /* route flags (see below) */
  93         struct sockaddr ro_dst;
  94 };
  95
  96 #define ROF_SRCIF_SELECTED      0x1 /* source interface was selected */
  97
  98 #else
  99 struct route;
 100 #endif /* PRIVATE */
 101
 102 /*
 103  * These numbers are used by reliable protocols for determining
 104  * retransmission behavior and are included in the routing structure.
 105  */
 106 struct rt_metrics {
 107         u_int32_t       rmx_locks;      /* Kernel must leave these values alone */
 108         u_int32_t       rmx_mtu;        /* MTU for this path */
 109         u_int32_t       rmx_hopcount;   /* max hops expected */
 110         int32_t         rmx_expire;     /* lifetime for route, e.g. redirect */
 111         u_int32_t       rmx_recvpipe;   /* inbound delay-bandwidth product */
 112         u_int32_t       rmx_sendpipe;   /* outbound delay-bandwidth product */
 113         u_int32_t       rmx_ssthresh;   /* outbound gateway buffer limit */
 114         u_int32_t       rmx_rtt;        /* estimated round trip time */
 115         u_int32_t       rmx_rttvar;     /* estimated rtt variance */
 116         u_int32_t       rmx_pksent;     /* packets sent using this route */
 117         u_int32_t       rmx_filler[4];  /* will be used for T/TCP later */
 118 };
 119
 120 /*
 121  * rmx_rtt and rmx_rttvar are stored as microseconds;
 122  */
 123 #define RTM_RTTUNIT     1000000 /* units for rtt, rttvar, as units per sec */
 124
 125 #ifdef KERNEL_PRIVATE
 126 /*
 127  * New expiry value (in seconds) when dealing with interfaces which implement
 128  * the if_want_aggressive_drain behavior.  Otherwise the event mechanism wouldn't
 129  * fire quick enough to cause any sort of significant gains in performance.
 130  */
 131 #define RT_IF_IDLE_EXPIRE_TIMEOUT       30
 132 #define RT_IF_IDLE_DRAIN_INTERVAL       10
 133 #endif /* KERNEL_PRIVATE */
 134
 135 /*
 136  * We distinguish between routes to hosts and routes to networks,
 137  * preferring the former if available.  For each route we infer
 138  * the interface to use from the gateway address supplied when
 139  * the route was entered.  Routes that forward packets through
 140  * gateways are marked so that the output routines know to address the
 141  * gateway rather than the ultimate destination.
 142  */
 143 #ifdef KERNEL_PRIVATE
 144 #include <kern/locks.h>
 145 #ifndef RNF_NORMAL
 146 #include <net/radix.h>
 147 #endif
 148 /*
 149  * Kernel routing entry structure (private).
 150  */
 151 struct rtentry {
 152         struct  radix_node rt_nodes[2]; /* tree glue, and other values */
 153 #define rt_key(r)       ((struct sockaddr *)((r)->rt_nodes->rn_key))
 154 #define rt_mask(r)      ((struct sockaddr *)((r)->rt_nodes->rn_mask))
 155         struct  sockaddr *rt_gateway;   /* value */
 156         int32_t rt_refcnt;              /* # held references */
 157         uint32_t rt_flags;              /* up/down?, host/net */
 158         struct  ifnet *rt_ifp;          /* the answer: interface to use */
 159         struct  ifaddr *rt_ifa;         /* the answer: interface addr to use */
 160         struct  sockaddr *rt_genmask;   /* for generation of cloned routes */
 161         void    *rt_llinfo;             /* pointer to link level info cache */
 162         void    (*rt_llinfo_free)(void *); /* link level info free function */
 163         struct  rt_metrics rt_rmx;      /* metrics used by rx'ing protocols */
 164         struct  rtentry *rt_gwroute;    /* implied entry for gatewayed routes */
 165         struct  rtentry *rt_parent;     /* cloning parent of this route */
 166         uint32_t generation_id;         /* route generation id */
 167         /*
 168          * See bsd/net/route.c for synchronization notes.
 169          */
 170         decl_lck_mtx_data(, rt_lock);   /* lock for routing entry */
 171 #if IFNET_ROUTE_REFCNT
 172         void    (*rt_if_ref_fn)(struct ifnet *, int); /* interface ref func */
 173 #endif /* IFNET_ROUTE_REFCNT */
 174 };
 175 #endif /* KERNEL_PRIVATE */
 176
 177 #ifdef KERNEL_PRIVATE
 178 #define rt_use rt_rmx.rmx_pksent
 179 #endif /* KERNEL_PRIVATE */
 180
 181 #define RTF_UP          0x1             /* route usable */
 182 #define RTF_GATEWAY     0x2             /* destination is a gateway */
 183 #define RTF_HOST        0x4             /* host entry (net otherwise) */
 184 #define RTF_REJECT      0x8             /* host or net unreachable */
 185 #define RTF_DYNAMIC     0x10            /* created dynamically (by redirect) */
 186 #define RTF_MODIFIED    0x20            /* modified dynamically (by redirect) */
 187 #define RTF_DONE        0x40            /* message confirmed */
 188 #define RTF_DELCLONE    0x80            /* delete cloned route */
 189 #define RTF_CLONING     0x100           /* generate new routes on use */
 190 #define RTF_XRESOLVE    0x200           /* external daemon resolves name */
 191 #define RTF_LLINFO      0x400           /* generated by link layer (e.g. ARP) */
 192 #define RTF_STATIC      0x800           /* manually added */
 193 #define RTF_BLACKHOLE   0x1000          /* just discard pkts (during updates) */
 194 #define RTF_PROTO2      0x4000          /* protocol specific routing flag */
 195 #define RTF_PROTO1      0x8000          /* protocol specific routing flag */
 196
 197 #define RTF_PRCLONING   0x10000         /* protocol requires cloning */
 198 #define RTF_WASCLONED   0x20000         /* route generated through cloning */
 199 #define RTF_PROTO3      0x40000         /* protocol specific routing flag */
 200                                         /* 0x80000 unused */
 201 #define RTF_PINNED      0x100000        /* future use */
 202 #define RTF_LOCAL       0x200000        /* route represents a local address */
 203 #define RTF_BROADCAST   0x400000        /* route represents a bcast address */
 204 #define RTF_MULTICAST   0x800000        /* route represents a mcast address */
 205 #define RTF_IFSCOPE     0x1000000       /* has valid interface scope */
 206 #define RTF_CONDEMNED   0x2000000       /* defunct; no longer modifiable */
 207 #define RTF_IFREF       0x4000000       /* route holds a ref to interface */
 208                                         /* 0x8000000 and up unassigned */
 209
 210 /*
 211  * Routing statistics.
 212  */
 213 struct  rtstat {
 214         short   rts_badredirect;        /* bogus redirect calls */
 215         short   rts_dynamic;            /* routes created by redirects */
 216         short   rts_newgateway;         /* routes modified by redirects */
 217         short   rts_unreach;            /* lookups which failed */
 218         short   rts_wildcard;           /* lookups satisfied by a wildcard */
 219 };
 220
 221 /*
 222  * Structures for routing messages.
 223  */
 224 struct rt_msghdr {
 225         u_short rtm_msglen;             /* to skip over non-understood messages */
 226         u_char  rtm_version;            /* future binary compatibility */
 227         u_char  rtm_type;               /* message type */
 228         u_short rtm_index;              /* index for associated ifp */
 229         int     rtm_flags;              /* flags, incl. kern & message, e.g. DONE */
 230         int     rtm_addrs;              /* bitmask identifying sockaddrs in msg */
 231         pid_t   rtm_pid;                /* identify sender */
 232         int     rtm_seq;                /* for sender to identify action */
 233         int     rtm_errno;              /* why failed */
 234         int     rtm_use;                /* from rtentry */
 235         u_int32_t rtm_inits;            /* which metrics we are initializing */
 236         struct rt_metrics rtm_rmx;      /* metrics themselves */
 237 };
 238
 239 struct rt_msghdr2 {
 240         u_short rtm_msglen;             /* to skip over non-understood messages */
 241         u_char  rtm_version;            /* future binary compatibility */
 242         u_char  rtm_type;               /* message type */
 243         u_short rtm_index;              /* index for associated ifp */
 244         int     rtm_flags;              /* flags, incl. kern & message, e.g. DONE */
 245         int     rtm_addrs;              /* bitmask identifying sockaddrs in msg */
 246         int32_t rtm_refcnt;             /* reference count */
 247         int     rtm_parentflags;        /* flags of the parent route */
 248         int     rtm_reserved;           /* reserved field set to 0 */
 249         int     rtm_use;                /* from rtentry */
 250         u_int32_t rtm_inits;            /* which metrics we are initializing */
 251         struct rt_metrics rtm_rmx;      /* metrics themselves */
 252 };
 253
 254
 255 #define RTM_VERSION     5       /* Up the ante and ignore older versions */
 256
 257 /*
 258  * Message types.
 259  */
 260 #define RTM_ADD         0x1     /* Add Route */
 261 #define RTM_DELETE      0x2     /* Delete Route */
 262 #define RTM_CHANGE      0x3     /* Change Metrics or flags */
 263 #define RTM_GET         0x4     /* Report Metrics */
 264 #define RTM_LOSING      0x5     /* Kernel Suspects Partitioning */
 265 #define RTM_REDIRECT    0x6     /* Told to use different route */
 266 #define RTM_MISS        0x7     /* Lookup failed on this address */
 267 #define RTM_LOCK        0x8     /* fix specified metrics */
 268 #define RTM_OLDADD      0x9     /* caused by SIOCADDRT */
 269 #define RTM_OLDDEL      0xa     /* caused by SIOCDELRT */
 270 #define RTM_RESOLVE     0xb     /* req to resolve dst to LL addr */
 271 #define RTM_NEWADDR     0xc     /* address being added to iface */
 272 #define RTM_DELADDR     0xd     /* address being removed from iface */
 273 #define RTM_IFINFO      0xe     /* iface going up/down etc. */
 274 #define RTM_NEWMADDR    0xf     /* mcast group membership being added to if */
 275 #define RTM_DELMADDR    0x10    /* mcast group membership being deleted */
 276 #ifdef PRIVATE
 277 #define RTM_GET_SILENT  0x11
 278 #endif /* PRIVATE */
 279 #define RTM_IFINFO2     0x12    /* */
 280 #define RTM_NEWMADDR2   0x13    /* */
 281 #define RTM_GET2        0x14    /* */
 282
 283 /*
 284  * Bitmask values for rtm_inits and rmx_locks.
 285  */
 286 #define RTV_MTU         0x1     /* init or lock _mtu */
 287 #define RTV_HOPCOUNT    0x2     /* init or lock _hopcount */
 288 #define RTV_EXPIRE      0x4     /* init or lock _expire */
 289 #define RTV_RPIPE       0x8     /* init or lock _recvpipe */
 290 #define RTV_SPIPE       0x10    /* init or lock _sendpipe */
 291 #define RTV_SSTHRESH    0x20    /* init or lock _ssthresh */
 292 #define RTV_RTT         0x40    /* init or lock _rtt */
 293 #define RTV_RTTVAR      0x80    /* init or lock _rttvar */
 294
 295 /*
 296  * Bitmask values for rtm_addrs.
 297  */
 298 #define RTA_DST         0x1     /* destination sockaddr present */
 299 #define RTA_GATEWAY     0x2     /* gateway sockaddr present */
 300 #define RTA_NETMASK     0x4     /* netmask sockaddr present */
 301 #define RTA_GENMASK     0x8     /* cloning mask sockaddr present */
 302 #define RTA_IFP         0x10    /* interface name sockaddr present */
 303 #define RTA_IFA         0x20    /* interface addr sockaddr present */
 304 #define RTA_AUTHOR      0x40    /* sockaddr for author of redirect */
 305 #define RTA_BRD         0x80    /* for NEWADDR, broadcast or p-p dest addr */
 306
 307 /*
 308  * Index offsets for sockaddr array for alternate internal encoding.
 309  */
 310 #define RTAX_DST        0       /* destination sockaddr present */
 311 #define RTAX_GATEWAY    1       /* gateway sockaddr present */
 312 #define RTAX_NETMASK    2       /* netmask sockaddr present */
 313 #define RTAX_GENMASK    3       /* cloning mask sockaddr present */
 314 #define RTAX_IFP        4       /* interface name sockaddr present */
 315 #define RTAX_IFA        5       /* interface addr sockaddr present */
 316 #define RTAX_AUTHOR     6       /* sockaddr for author of redirect */
 317 #define RTAX_BRD        7       /* for NEWADDR, broadcast or p-p dest addr */
 318 #define RTAX_MAX        8       /* size of array to allocate */
 319
 320 struct rt_addrinfo {
 321         int     rti_addrs;
 322         struct  sockaddr *rti_info[RTAX_MAX];
 323 };
 324
 325 struct route_cb {
 326         int     ip_count;
 327         int     ip6_count;
 328         int     ipx_count;
 329         int     ns_count;
 330         int     iso_count;
 331         int     any_count;
 332 };
 333
 334 #ifdef PRIVATE
 335 /*
 336  * For scoped routing; a zero interface scope value means nil/no scope.
 337  */
 338 #define IFSCOPE_NONE    0
 339 #endif /* PRIVATE */
 340
 341 #ifdef KERNEL_PRIVATE
 342 /*
 343  * Generic call trace used by some subsystems (e.g. route, ifaddr)
 344  */
 345 #define CTRACE_STACK_SIZE       8               /* depth of stack trace */
 346 #define CTRACE_HIST_SIZE        4               /* refcnt history size */
 347 typedef struct ctrace {
 348         void    *th;                            /* thread ptr */
 349         void    *pc[CTRACE_STACK_SIZE];         /* PC stack trace */
 350 } ctrace_t;
 351
 352 extern void ctrace_record(ctrace_t *);
 353
 354 #define RT_LOCK_ASSERT_HELD(_rt)                                        \
 355         lck_mtx_assert(&(_rt)->rt_lock, LCK_MTX_ASSERT_OWNED)
 356
 357 #define RT_LOCK_ASSERT_NOTHELD(_rt)                                     \
 358         lck_mtx_assert(&(_rt)->rt_lock, LCK_MTX_ASSERT_NOTOWNED)
 359
 360 #define RT_LOCK(_rt) do {                                               \
 361         if (!rte_debug)                                                 \
 362                 lck_mtx_lock(&(_rt)->rt_lock);                          \
 363         else                                                            \
 364                 rt_lock(_rt, FALSE);                                    \
 365 } while (0)
 366
 367 #define RT_LOCK_SPIN(_rt) do {                                          \
 368         if (!rte_debug)                                                 \
 369                 lck_mtx_lock_spin(&(_rt)->rt_lock);                     \
 370         else                                                            \
 371                 rt_lock(_rt, TRUE);                                     \
 372 } while (0)
 373
 374 #define RT_CONVERT_LOCK(_rt) do {                                       \
 375         RT_LOCK_ASSERT_HELD(_rt);                                       \
 376         lck_mtx_convert_spin(&(_rt)->rt_lock);                          \
 377 } while (0)
 378
 379 #define RT_UNLOCK(_rt) do {                                             \
 380         if (!rte_debug)                                                 \
 381                 lck_mtx_unlock(&(_rt)->rt_lock);                        \
 382         else                                                            \
 383                 rt_unlock(_rt);                                         \
 384 } while (0)
 385
 386 #define RT_ADDREF_LOCKED(_rt) do {                                      \
 387         if (!rte_debug) {                                               \
 388                 RT_LOCK_ASSERT_HELD(_rt);                               \
 389                 if (++(_rt)->rt_refcnt == 0)                            \
 390                         panic("RT_ADDREF(%p) bad refcnt\n", _rt);       \
 391         } else {                                                        \
 392                 rtref(_rt);                                             \
 393         }                                                               \
 394 } while (0)
 395
 396 /*
 397  * Spin variant mutex is used here; caller is responsible for
 398  * converting any previously-held similar lock to full mutex.
 399  */
 400 #define RT_ADDREF(_rt) do {                                             \
 401         RT_LOCK_SPIN(_rt);                                              \
 402         RT_ADDREF_LOCKED(_rt);                                          \
 403         RT_UNLOCK(_rt);                                                 \
 404 } while (0)
 405
 406 #define RT_REMREF_LOCKED(_rt) do {                                      \
 407         if (!rte_debug) {                                               \
 408                 RT_LOCK_ASSERT_HELD(_rt);                               \
 409                 if ((_rt)->rt_refcnt == 0)                              \
 410                         panic("RT_REMREF(%p) bad refcnt\n", _rt);       \
 411                 --(_rt)->rt_refcnt;                                     \
 412         } else {                                                        \
 413                 (void) rtunref(_rt);                                    \
 414         }                                                               \
 415 } while (0)
 416
 417 /*
 418  * Spin variant mutex is used here; caller is responsible for
 419  * converting any previously-held similar lock to full mutex.
 420  */
 421 #define RT_REMREF(_rt) do {                                             \
 422         RT_LOCK_SPIN(_rt);                                              \
 423         RT_REMREF_LOCKED(_rt);                                          \
 424         RT_UNLOCK(_rt);                                                 \
 425 } while (0)
 426
 427 #define RTFREE(_rt)             rtfree(_rt)
 428 #define RTFREE_LOCKED(_rt)      rtfree_locked(_rt)
 429
 430 extern struct route_cb route_cb;
 431 extern struct radix_node_head *rt_tables[AF_MAX+1];
 432 __private_extern__ lck_mtx_t *rnh_lock;
 433 __private_extern__ int use_routegenid;
 434 __private_extern__ uint32_t route_generation;
 435 __private_extern__ int rttrash;
 436 __private_extern__ unsigned int rte_debug;
 437
 438 struct ifmultiaddr;
 439 struct proc;
 440
 441 extern void route_init(void) __attribute__((section("__TEXT, initcode")));
 442 extern void routegenid_update(void);
 443 extern void rt_ifmsg(struct ifnet *);
 444 extern void rt_missmsg(int, struct rt_addrinfo *, int, int);
 445 extern void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *);
 446 extern void rt_newmaddrmsg(int, struct ifmultiaddr *);
 447 extern int rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *);
 448 extern void set_primary_ifscope(unsigned int);
 449 extern unsigned int get_primary_ifscope(void);
 450 extern boolean_t rt_inet_default(struct rtentry *, struct sockaddr *);
 451 extern struct rtentry *rt_lookup(boolean_t, struct sockaddr *,
 452     struct sockaddr *, struct radix_node_head *, unsigned int);
 453 extern void rtalloc(struct route *);
 454 extern void rtalloc_ign(struct route *, uint32_t);
 455 extern void rtalloc_ign_locked(struct route *, uint32_t);
 456 extern void rtalloc_scoped_ign(struct route *, uint32_t, unsigned int);
 457 extern void rtalloc_scoped_ign_locked(struct route *, uint32_t, unsigned int);
 458 extern struct rtentry *rtalloc1(struct sockaddr *, int, uint32_t);
 459 extern struct rtentry *rtalloc1_locked(struct sockaddr *, int, uint32_t);
 460 extern struct rtentry *rtalloc1_scoped(struct sockaddr *, int, uint32_t,
 461     unsigned int);
 462 extern struct rtentry *rtalloc1_scoped_locked(struct sockaddr *, int,
 463     uint32_t, unsigned int);
 464 extern void rtfree(struct rtentry *);
 465 extern void rtfree_locked(struct rtentry *);
 466 extern void rtref(struct rtentry *);
 467 /*
 468  * rtunref will decrement the refcount, rtfree will decrement and free if
 469  * the refcount has reached zero and the route is not up.
 470  * Unless you have good reason to do otherwise, use rtfree.
 471  */
 472 extern int rtunref(struct rtentry *);
 473 extern void rtsetifa(struct rtentry *, struct ifaddr *);
 474 extern int rtinit(struct ifaddr *, int, int);
 475 extern int rtinit_locked(struct ifaddr *, int, int);
 476 extern int rtioctl(unsigned long, caddr_t, struct proc *);
 477 extern void rtredirect(struct ifnet *, struct sockaddr *, struct sockaddr *,
 478     struct sockaddr *, int, struct sockaddr *, struct rtentry **);
 479 extern int rtrequest(int, struct sockaddr *,
 480     struct sockaddr *, struct sockaddr *, int, struct rtentry **);
 481 extern int rtrequest_locked(int, struct sockaddr *,
 482     struct sockaddr *, struct sockaddr *, int, struct rtentry **);
 483 extern int rtrequest_scoped_locked(int, struct sockaddr *, struct sockaddr *,
 484     struct sockaddr *, int, struct rtentry **, unsigned int);
 485 extern unsigned int sa_get_ifscope(struct sockaddr *);
 486 extern void rt_lock(struct rtentry *, boolean_t);
 487 extern void rt_unlock(struct rtentry *);
 488 extern struct sockaddr *rtm_scrub_ifscope(int, struct sockaddr *,
 489     struct sockaddr *, struct sockaddr_storage *);
 490 extern u_int64_t rt_expiry(struct rtentry *, u_int64_t, u_int32_t);
 491 #if IFNET_ROUTE_REFCNT
 492 extern void rt_aggdrain(int);
 493 #endif /* IFNET_ROUTE_REFCNT */
 494 #endif /* KERNEL_PRIVATE */
 495
 496 #endif