bsd/net/route.h

   1 /*
   2  * Copyright (c) 2000-2008 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 /*
 126  * We distinguish between routes to hosts and routes to networks,
 127  * preferring the former if available.  For each route we infer
 128  * the interface to use from the gateway address supplied when
 129  * the route was entered.  Routes that forward packets through
 130  * gateways are marked so that the output routines know to address the
 131  * gateway rather than the ultimate destination.
 132  */
 133 #ifdef KERNEL_PRIVATE
 134 #include <kern/locks.h>
 135 #ifndef RNF_NORMAL
 136 #include <net/radix.h>
 137 #endif
 138 /*
 139  * Kernel routing entry structure (private).
 140  */
 141 struct rtentry {
 142         struct  radix_node rt_nodes[2]; /* tree glue, and other values */
 143 #define rt_key(r)       ((struct sockaddr *)((r)->rt_nodes->rn_key))
 144 #define rt_mask(r)      ((struct sockaddr *)((r)->rt_nodes->rn_mask))
 145         struct  sockaddr *rt_gateway;   /* value */
 146         int32_t rt_refcnt;              /* # held references */
 147         uint32_t rt_flags;              /* up/down?, host/net */
 148         struct  ifnet *rt_ifp;          /* the answer: interface to use */
 149         struct  ifaddr *rt_ifa;         /* the answer: interface addr to use */
 150         struct  sockaddr *rt_genmask;   /* for generation of cloned routes */
 151         void    *rt_llinfo;             /* pointer to link level info cache */
 152         void    (*rt_llinfo_free)(void *); /* link level info free function */
 153         struct  rt_metrics rt_rmx;      /* metrics used by rx'ing protocols */
 154         struct  rtentry *rt_gwroute;    /* implied entry for gatewayed routes */
 155         struct  rtentry *rt_parent;     /* cloning parent of this route */
 156         uint32_t generation_id;         /* route generation id */
 157         /*
 158          * See bsd/net/route.c for synchronization notes.
 159          */
 160         decl_lck_mtx_data(, rt_lock);   /* lock for routing entry */
 161 };
 162 #endif /* KERNEL_PRIVATE */
 163
 164 #ifdef KERNEL_PRIVATE
 165 #define rt_use rt_rmx.rmx_pksent
 166 #endif /* KERNEL_PRIVATE */
 167
 168 #define RTF_UP          0x1             /* route usable */
 169 #define RTF_GATEWAY     0x2             /* destination is a gateway */
 170 #define RTF_HOST        0x4             /* host entry (net otherwise) */
 171 #define RTF_REJECT      0x8             /* host or net unreachable */
 172 #define RTF_DYNAMIC     0x10            /* created dynamically (by redirect) */
 173 #define RTF_MODIFIED    0x20            /* modified dynamically (by redirect) */
 174 #define RTF_DONE        0x40            /* message confirmed */
 175 #define RTF_DELCLONE    0x80            /* delete cloned route */
 176 #define RTF_CLONING     0x100           /* generate new routes on use */
 177 #define RTF_XRESOLVE    0x200           /* external daemon resolves name */
 178 #define RTF_LLINFO      0x400           /* generated by link layer (e.g. ARP) */
 179 #define RTF_STATIC      0x800           /* manually added */
 180 #define RTF_BLACKHOLE   0x1000          /* just discard pkts (during updates) */
 181 #define RTF_PROTO2      0x4000          /* protocol specific routing flag */
 182 #define RTF_PROTO1      0x8000          /* protocol specific routing flag */
 183
 184 #define RTF_PRCLONING   0x10000         /* protocol requires cloning */
 185 #define RTF_WASCLONED   0x20000         /* route generated through cloning */
 186 #define RTF_PROTO3      0x40000         /* protocol specific routing flag */
 187                                         /* 0x80000 unused */
 188 #define RTF_PINNED      0x100000        /* future use */
 189 #define RTF_LOCAL       0x200000        /* route represents a local address */
 190 #define RTF_BROADCAST   0x400000        /* route represents a bcast address */
 191 #define RTF_MULTICAST   0x800000        /* route represents a mcast address */
 192 #define RTF_IFSCOPE     0x1000000       /* has valid interface scope */
 193 #define RTF_CONDEMNED   0x2000000       /* defunct; no longer modifiable */
 194                                         /* 0x4000000 and up unassigned */
 195
 196 /*
 197  * Routing statistics.
 198  */
 199 struct  rtstat {
 200         short   rts_badredirect;        /* bogus redirect calls */
 201         short   rts_dynamic;            /* routes created by redirects */
 202         short   rts_newgateway;         /* routes modified by redirects */
 203         short   rts_unreach;            /* lookups which failed */
 204         short   rts_wildcard;           /* lookups satisfied by a wildcard */
 205 };
 206
 207 /*
 208  * Structures for routing messages.
 209  */
 210 struct rt_msghdr {
 211         u_short rtm_msglen;             /* to skip over non-understood messages */
 212         u_char  rtm_version;            /* future binary compatibility */
 213         u_char  rtm_type;               /* message type */
 214         u_short rtm_index;              /* index for associated ifp */
 215         int     rtm_flags;              /* flags, incl. kern & message, e.g. DONE */
 216         int     rtm_addrs;              /* bitmask identifying sockaddrs in msg */
 217         pid_t   rtm_pid;                /* identify sender */
 218         int     rtm_seq;                /* for sender to identify action */
 219         int     rtm_errno;              /* why failed */
 220         int     rtm_use;                /* from rtentry */
 221         u_int32_t rtm_inits;            /* which metrics we are initializing */
 222         struct rt_metrics rtm_rmx;      /* metrics themselves */
 223 };
 224
 225 struct rt_msghdr2 {
 226         u_short rtm_msglen;             /* to skip over non-understood messages */
 227         u_char  rtm_version;            /* future binary compatibility */
 228         u_char  rtm_type;               /* message type */
 229         u_short rtm_index;              /* index for associated ifp */
 230         int     rtm_flags;              /* flags, incl. kern & message, e.g. DONE */
 231         int     rtm_addrs;              /* bitmask identifying sockaddrs in msg */
 232         int32_t rtm_refcnt;             /* reference count */
 233         int     rtm_parentflags;        /* flags of the parent route */
 234         int     rtm_reserved;           /* reserved field set to 0 */
 235         int     rtm_use;                /* from rtentry */
 236         u_int32_t rtm_inits;            /* which metrics we are initializing */
 237         struct rt_metrics rtm_rmx;      /* metrics themselves */
 238 };
 239
 240
 241 #define RTM_VERSION     5       /* Up the ante and ignore older versions */
 242
 243 /*
 244  * Message types.
 245  */
 246 #define RTM_ADD         0x1     /* Add Route */
 247 #define RTM_DELETE      0x2     /* Delete Route */
 248 #define RTM_CHANGE      0x3     /* Change Metrics or flags */
 249 #define RTM_GET         0x4     /* Report Metrics */
 250 #define RTM_LOSING      0x5     /* Kernel Suspects Partitioning */
 251 #define RTM_REDIRECT    0x6     /* Told to use different route */
 252 #define RTM_MISS        0x7     /* Lookup failed on this address */
 253 #define RTM_LOCK        0x8     /* fix specified metrics */
 254 #define RTM_OLDADD      0x9     /* caused by SIOCADDRT */
 255 #define RTM_OLDDEL      0xa     /* caused by SIOCDELRT */
 256 #define RTM_RESOLVE     0xb     /* req to resolve dst to LL addr */
 257 #define RTM_NEWADDR     0xc     /* address being added to iface */
 258 #define RTM_DELADDR     0xd     /* address being removed from iface */
 259 #define RTM_IFINFO      0xe     /* iface going up/down etc. */
 260 #define RTM_NEWMADDR    0xf     /* mcast group membership being added to if */
 261 #define RTM_DELMADDR    0x10    /* mcast group membership being deleted */
 262 #ifdef PRIVATE
 263 #define RTM_GET_SILENT  0x11
 264 #endif /* PRIVATE */
 265 #define RTM_IFINFO2     0x12    /* */
 266 #define RTM_NEWMADDR2   0x13    /* */
 267 #define RTM_GET2        0x14    /* */
 268
 269 /*
 270  * Bitmask values for rtm_inits and rmx_locks.
 271  */
 272 #define RTV_MTU         0x1     /* init or lock _mtu */
 273 #define RTV_HOPCOUNT    0x2     /* init or lock _hopcount */
 274 #define RTV_EXPIRE      0x4     /* init or lock _expire */
 275 #define RTV_RPIPE       0x8     /* init or lock _recvpipe */
 276 #define RTV_SPIPE       0x10    /* init or lock _sendpipe */
 277 #define RTV_SSTHRESH    0x20    /* init or lock _ssthresh */
 278 #define RTV_RTT         0x40    /* init or lock _rtt */
 279 #define RTV_RTTVAR      0x80    /* init or lock _rttvar */
 280
 281 /*
 282  * Bitmask values for rtm_addrs.
 283  */
 284 #define RTA_DST         0x1     /* destination sockaddr present */
 285 #define RTA_GATEWAY     0x2     /* gateway sockaddr present */
 286 #define RTA_NETMASK     0x4     /* netmask sockaddr present */
 287 #define RTA_GENMASK     0x8     /* cloning mask sockaddr present */
 288 #define RTA_IFP         0x10    /* interface name sockaddr present */
 289 #define RTA_IFA         0x20    /* interface addr sockaddr present */
 290 #define RTA_AUTHOR      0x40    /* sockaddr for author of redirect */
 291 #define RTA_BRD         0x80    /* for NEWADDR, broadcast or p-p dest addr */
 292
 293 /*
 294  * Index offsets for sockaddr array for alternate internal encoding.
 295  */
 296 #define RTAX_DST        0       /* destination sockaddr present */
 297 #define RTAX_GATEWAY    1       /* gateway sockaddr present */
 298 #define RTAX_NETMASK    2       /* netmask sockaddr present */
 299 #define RTAX_GENMASK    3       /* cloning mask sockaddr present */
 300 #define RTAX_IFP        4       /* interface name sockaddr present */
 301 #define RTAX_IFA        5       /* interface addr sockaddr present */
 302 #define RTAX_AUTHOR     6       /* sockaddr for author of redirect */
 303 #define RTAX_BRD        7       /* for NEWADDR, broadcast or p-p dest addr */
 304 #define RTAX_MAX        8       /* size of array to allocate */
 305
 306 struct rt_addrinfo {
 307         int     rti_addrs;
 308         struct  sockaddr *rti_info[RTAX_MAX];
 309 };
 310
 311 struct route_cb {
 312         int     ip_count;
 313         int     ip6_count;
 314         int     ipx_count;
 315         int     ns_count;
 316         int     iso_count;
 317         int     any_count;
 318 };
 319
 320 #ifdef PRIVATE
 321 /*
 322  * For scoped routing; a zero interface scope value means nil/no scope.
 323  */
 324 #define IFSCOPE_NONE    0
 325 #endif /* PRIVATE */
 326
 327 #ifdef KERNEL_PRIVATE
 328 /*
 329  * Generic call trace used by some subsystems (e.g. route, ifaddr)
 330  */
 331 #define CTRACE_STACK_SIZE       8               /* depth of stack trace */
 332 #define CTRACE_HIST_SIZE        4               /* refcnt history size */
 333 typedef struct ctrace {
 334         void    *th;                            /* thread ptr */
 335         void    *pc[CTRACE_STACK_SIZE];         /* PC stack trace */
 336 } ctrace_t;
 337
 338 extern void ctrace_record(ctrace_t *);
 339
 340 #define RT_LOCK_ASSERT_HELD(_rt)                                        \
 341         lck_mtx_assert(&(_rt)->rt_lock, LCK_MTX_ASSERT_OWNED)
 342
 343 #define RT_LOCK_ASSERT_NOTHELD(_rt)                                     \
 344         lck_mtx_assert(&(_rt)->rt_lock, LCK_MTX_ASSERT_NOTOWNED)
 345
 346 #define RT_LOCK(_rt) do {                                               \
 347         if (!rte_debug)                                                 \
 348                 lck_mtx_lock(&(_rt)->rt_lock);                          \
 349         else                                                            \
 350                 rt_lock(_rt, FALSE);                                    \
 351 } while (0)
 352
 353 #define RT_LOCK_SPIN(_rt) do {                                          \
 354         if (!rte_debug)                                                 \
 355                 lck_mtx_lock_spin(&(_rt)->rt_lock);                     \
 356         else                                                            \
 357                 rt_lock(_rt, TRUE);                                     \
 358 } while (0)
 359
 360 #define RT_CONVERT_LOCK(_rt) do {                                       \
 361         RT_LOCK_ASSERT_HELD(_rt);                                       \
 362         lck_mtx_convert_spin(&(_rt)->rt_lock);                          \
 363 } while (0)
 364
 365 #define RT_UNLOCK(_rt) do {                                             \
 366         if (!rte_debug)                                                 \
 367                 lck_mtx_unlock(&(_rt)->rt_lock);                        \
 368         else                                                            \
 369                 rt_unlock(_rt);                                         \
 370 } while (0)
 371
 372 #define RT_ADDREF_LOCKED(_rt) do {                                      \
 373         if (!rte_debug) {                                               \
 374                 RT_LOCK_ASSERT_HELD(_rt);                               \
 375                 if (++(_rt)->rt_refcnt == 0)                            \
 376                         panic("RT_ADDREF(%p) bad refcnt\n", _rt);       \
 377         } else {                                                        \
 378                 rtref(_rt);                                             \
 379         }                                                               \
 380 } while (0)
 381
 382 /*
 383  * Spin variant mutex is used here; caller is responsible for
 384  * converting any previously-held similar lock to full mutex.
 385  */
 386 #define RT_ADDREF(_rt) do {                                             \
 387         RT_LOCK_SPIN(_rt);                                              \
 388         RT_ADDREF_LOCKED(_rt);                                          \
 389         RT_UNLOCK(_rt);                                                 \
 390 } while (0)
 391
 392 #define RT_REMREF_LOCKED(_rt) do {                                      \
 393         if (!rte_debug) {                                               \
 394                 RT_LOCK_ASSERT_HELD(_rt);                               \
 395                 if ((_rt)->rt_refcnt == 0)                              \
 396                         panic("RT_REMREF(%p) bad refcnt\n", _rt);       \
 397                 --(_rt)->rt_refcnt;                                     \
 398         } else {                                                        \
 399                 (void) rtunref(_rt);                                    \
 400         }                                                               \
 401 } while (0)
 402
 403 /*
 404  * Spin variant mutex is used here; caller is responsible for
 405  * converting any previously-held similar lock to full mutex.
 406  */
 407 #define RT_REMREF(_rt) do {                                             \
 408         RT_LOCK_SPIN(_rt);                                              \
 409         RT_REMREF_LOCKED(_rt);                                          \
 410         RT_UNLOCK(_rt);                                                 \
 411 } while (0)
 412
 413 #define RTFREE(_rt)             rtfree(_rt)
 414 #define RTFREE_LOCKED(_rt)      rtfree_locked(_rt)
 415
 416 extern struct route_cb route_cb;
 417 extern struct radix_node_head *rt_tables[AF_MAX+1];
 418 __private_extern__ lck_mtx_t *rnh_lock;
 419 __private_extern__ int use_routegenid;
 420 __private_extern__ uint32_t route_generation;
 421 __private_extern__ int rttrash;
 422 __private_extern__ unsigned int rte_debug;
 423
 424 struct ifmultiaddr;
 425 struct proc;
 426
 427 extern void route_init(void) __attribute__((section("__TEXT, initcode")));
 428 extern void routegenid_update(void);
 429 extern void rt_ifmsg(struct ifnet *);
 430 extern void rt_missmsg(int, struct rt_addrinfo *, int, int);
 431 extern void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *);
 432 extern void rt_newmaddrmsg(int, struct ifmultiaddr *);
 433 extern int rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *);
 434 extern void set_primary_ifscope(unsigned int);
 435 extern unsigned int get_primary_ifscope(void);
 436 extern boolean_t rt_inet_default(struct rtentry *, struct sockaddr *);
 437 extern struct rtentry *rt_lookup(boolean_t, struct sockaddr *,
 438     struct sockaddr *, struct radix_node_head *, unsigned int);
 439 extern void rtalloc(struct route *);
 440 extern void rtalloc_ign(struct route *, uint32_t);
 441 extern void rtalloc_ign_locked(struct route *, uint32_t);
 442 extern void rtalloc_scoped_ign(struct route *, uint32_t, unsigned int);
 443 extern void rtalloc_scoped_ign_locked(struct route *, uint32_t, unsigned int);
 444 extern struct rtentry *rtalloc1(struct sockaddr *, int, uint32_t);
 445 extern struct rtentry *rtalloc1_locked(struct sockaddr *, int, uint32_t);
 446 extern struct rtentry *rtalloc1_scoped(struct sockaddr *, int, uint32_t,
 447     unsigned int);
 448 extern struct rtentry *rtalloc1_scoped_locked(struct sockaddr *, int,
 449     uint32_t, unsigned int);
 450 extern void rtfree(struct rtentry *);
 451 extern void rtfree_locked(struct rtentry *);
 452 extern void rtref(struct rtentry *);
 453 /*
 454  * rtunref will decrement the refcount, rtfree will decrement and free if
 455  * the refcount has reached zero and the route is not up.
 456  * Unless you have good reason to do otherwise, use rtfree.
 457  */
 458 extern int rtunref(struct rtentry *);
 459 extern void rtsetifa(struct rtentry *, struct ifaddr *);
 460 extern int rtinit(struct ifaddr *, int, int);
 461 extern int rtinit_locked(struct ifaddr *, int, int);
 462 extern int rtioctl(unsigned long, caddr_t, struct proc *);
 463 extern void rtredirect(struct ifnet *, struct sockaddr *, struct sockaddr *,
 464     struct sockaddr *, int, struct sockaddr *, struct rtentry **);
 465 extern int rtrequest(int, struct sockaddr *,
 466     struct sockaddr *, struct sockaddr *, int, struct rtentry **);
 467 extern int rtrequest_locked(int, struct sockaddr *,
 468     struct sockaddr *, struct sockaddr *, int, struct rtentry **);
 469 extern int rtrequest_scoped_locked(int, struct sockaddr *, struct sockaddr *,
 470     struct sockaddr *, int, struct rtentry **, unsigned int);
 471 extern unsigned int sa_get_ifscope(struct sockaddr *);
 472 extern void rt_lock(struct rtentry *, boolean_t);
 473 extern void rt_unlock(struct rtentry *);
 474 extern struct sockaddr *rtm_scrub_ifscope(int, struct sockaddr *,
 475     struct sockaddr *, struct sockaddr_storage *);
 476 #endif /* KERNEL_PRIVATE */
 477
 478 #endif