bsd/net/route.h

   1 /*
   2  * Copyright (c) 2000-2011 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 /*
  99  * Route reachability info (private)
 100  */
 101 struct rt_reach_info {
 102         u_int32_t               ri_refcnt;      /* reference count */
 103         u_int32_t               ri_probes;      /* total # of probes */
 104         u_int64_t               ri_snd_expire;  /* transmit expiration (calendar) time */
 105         u_int64_t               ri_rcv_expire;  /* receive expiration (calendar) time */
 106 };
 107 #else
 108 struct route;
 109 #endif /* PRIVATE */
 110
 111 /*
 112  * These numbers are used by reliable protocols for determining
 113  * retransmission behavior and are included in the routing structure.
 114  */
 115 struct rt_metrics {
 116         u_int32_t       rmx_locks;      /* Kernel must leave these values alone */
 117         u_int32_t       rmx_mtu;        /* MTU for this path */
 118         u_int32_t       rmx_hopcount;   /* max hops expected */
 119         int32_t         rmx_expire;     /* lifetime for route, e.g. redirect */
 120         u_int32_t       rmx_recvpipe;   /* inbound delay-bandwidth product */
 121         u_int32_t       rmx_sendpipe;   /* outbound delay-bandwidth product */
 122         u_int32_t       rmx_ssthresh;   /* outbound gateway buffer limit */
 123         u_int32_t       rmx_rtt;        /* estimated round trip time */
 124         u_int32_t       rmx_rttvar;     /* estimated rtt variance */
 125         u_int32_t       rmx_pksent;     /* packets sent using this route */
 126         u_int32_t       rmx_filler[4];  /* will be used for T/TCP later */
 127 };
 128
 129 /*
 130  * rmx_rtt and rmx_rttvar are stored as microseconds;
 131  */
 132 #define RTM_RTTUNIT     1000000 /* units for rtt, rttvar, as units per sec */
 133
 134 #ifdef KERNEL_PRIVATE
 135 /*
 136  * New expiry value (in seconds) when dealing with interfaces which implement
 137  * the if_want_aggressive_drain behavior.  Otherwise the event mechanism wouldn't
 138  * fire quick enough to cause any sort of significant gains in performance.
 139  */
 140 #define RT_IF_IDLE_EXPIRE_TIMEOUT       30
 141 #define RT_IF_IDLE_DRAIN_INTERVAL       10
 142 #endif /* KERNEL_PRIVATE */
 143
 144 /*
 145  * We distinguish between routes to hosts and routes to networks,
 146  * preferring the former if available.  For each route we infer
 147  * the interface to use from the gateway address supplied when
 148  * the route was entered.  Routes that forward packets through
 149  * gateways are marked so that the output routines know to address the
 150  * gateway rather than the ultimate destination.
 151  */
 152 #ifdef KERNEL_PRIVATE
 153 #include <kern/locks.h>
 154 #ifndef RNF_NORMAL
 155 #include <net/radix.h>
 156 #endif
 157 /*
 158  * Kernel routing entry structure (private).
 159  */
 160 struct rtentry {
 161         struct  radix_node rt_nodes[2]; /* tree glue, and other values */
 162 #define rt_key(r)       ((struct sockaddr *)((r)->rt_nodes->rn_key))
 163 #define rt_mask(r)      ((struct sockaddr *)((r)->rt_nodes->rn_mask))
 164         struct  sockaddr *rt_gateway;   /* value */
 165         int32_t rt_refcnt;              /* # held references */
 166         uint32_t rt_flags;              /* up/down?, host/net */
 167         struct  ifnet *rt_ifp;          /* the answer: interface to use */
 168         struct  ifaddr *rt_ifa;         /* the answer: interface addr to use */
 169         struct  sockaddr *rt_genmask;   /* for generation of cloned routes */
 170         void    *rt_llinfo;             /* pointer to link level info cache */
 171         void    (*rt_llinfo_get_ri)     /* llinfo get reachability info fn */
 172             (struct rtentry *, struct rt_reach_info *);
 173         void    (*rt_llinfo_purge)(struct rtentry *); /* llinfo purge fn */
 174         void    (*rt_llinfo_free)(void *); /* link level info free function */
 175         struct  rt_metrics rt_rmx;      /* metrics used by rx'ing protocols */
 176         struct  rtentry *rt_gwroute;    /* implied entry for gatewayed routes */
 177         struct  rtentry *rt_parent;     /* cloning parent of this route */
 178         uint32_t generation_id;         /* route generation id */
 179         /*
 180          * See bsd/net/route.c for synchronization notes.
 181          */
 182         decl_lck_mtx_data(, rt_lock);   /* lock for routing entry */
 183         struct nstat_counts     *rt_stats;
 184         void    (*rt_if_ref_fn)(struct ifnet *, int); /* interface ref func */
 185
 186         uint64_t rt_expire;             /* expiration time in uptime seconds */
 187         uint64_t base_calendartime;     /* calendar time upon entry creation */
 188         uint64_t base_uptime;/*         uptime upon entry creation */
 189 };
 190
 191 extern void rt_setexpire(struct rtentry *, uint64_t);
 192 #endif /* KERNEL_PRIVATE */
 193
 194 #ifdef KERNEL_PRIVATE
 195 #define rt_use rt_rmx.rmx_pksent
 196 #endif /* KERNEL_PRIVATE */
 197
 198 #define RTF_UP          0x1             /* route usable */
 199 #define RTF_GATEWAY     0x2             /* destination is a gateway */
 200 #define RTF_HOST        0x4             /* host entry (net otherwise) */
 201 #define RTF_REJECT      0x8             /* host or net unreachable */
 202 #define RTF_DYNAMIC     0x10            /* created dynamically (by redirect) */
 203 #define RTF_MODIFIED    0x20            /* modified dynamically (by redirect) */
 204 #define RTF_DONE        0x40            /* message confirmed */
 205 #define RTF_DELCLONE    0x80            /* delete cloned route */
 206 #define RTF_CLONING     0x100           /* generate new routes on use */
 207 #define RTF_XRESOLVE    0x200           /* external daemon resolves name */
 208 #define RTF_LLINFO      0x400           /* generated by link layer (e.g. ARP) */
 209 #define RTF_STATIC      0x800           /* manually added */
 210 #define RTF_BLACKHOLE   0x1000          /* just discard pkts (during updates) */
 211 #define RTF_PROTO2      0x4000          /* protocol specific routing flag */
 212 #define RTF_PROTO1      0x8000          /* protocol specific routing flag */
 213
 214 #define RTF_PRCLONING   0x10000         /* protocol requires cloning */
 215 #define RTF_WASCLONED   0x20000         /* route generated through cloning */
 216 #define RTF_PROTO3      0x40000         /* protocol specific routing flag */
 217                                         /* 0x80000 unused */
 218 #define RTF_PINNED      0x100000        /* future use */
 219 #define RTF_LOCAL       0x200000        /* route represents a local address */
 220 #define RTF_BROADCAST   0x400000        /* route represents a bcast address */
 221 #define RTF_MULTICAST   0x800000        /* route represents a mcast address */
 222 #define RTF_IFSCOPE     0x1000000       /* has valid interface scope */
 223 #define RTF_CONDEMNED   0x2000000       /* defunct; no longer modifiable */
 224 #define RTF_IFREF       0x4000000       /* route holds a ref to interface */
 225                                         /* 0x8000000 and up unassigned */
 226
 227 /*
 228  * Routing statistics.
 229  */
 230 struct  rtstat {
 231         short   rts_badredirect;        /* bogus redirect calls */
 232         short   rts_dynamic;            /* routes created by redirects */
 233         short   rts_newgateway;         /* routes modified by redirects */
 234         short   rts_unreach;            /* lookups which failed */
 235         short   rts_wildcard;           /* lookups satisfied by a wildcard */
 236 };
 237
 238 /*
 239  * Structures for routing messages.
 240  */
 241 struct rt_msghdr {
 242         u_short rtm_msglen;             /* to skip over non-understood messages */
 243         u_char  rtm_version;            /* future binary compatibility */
 244         u_char  rtm_type;               /* message type */
 245         u_short rtm_index;              /* index for associated ifp */
 246         int     rtm_flags;              /* flags, incl. kern & message, e.g. DONE */
 247         int     rtm_addrs;              /* bitmask identifying sockaddrs in msg */
 248         pid_t   rtm_pid;                /* identify sender */
 249         int     rtm_seq;                /* for sender to identify action */
 250         int     rtm_errno;              /* why failed */
 251         int     rtm_use;                /* from rtentry */
 252         u_int32_t rtm_inits;            /* which metrics we are initializing */
 253         struct rt_metrics rtm_rmx;      /* metrics themselves */
 254 };
 255
 256 struct rt_msghdr2 {
 257         u_short rtm_msglen;             /* to skip over non-understood messages */
 258         u_char  rtm_version;            /* future binary compatibility */
 259         u_char  rtm_type;               /* message type */
 260         u_short rtm_index;              /* index for associated ifp */
 261         int     rtm_flags;              /* flags, incl. kern & message, e.g. DONE */
 262         int     rtm_addrs;              /* bitmask identifying sockaddrs in msg */
 263         int32_t rtm_refcnt;             /* reference count */
 264         int     rtm_parentflags;        /* flags of the parent route */
 265         int     rtm_reserved;           /* reserved field set to 0 */
 266         int     rtm_use;                /* from rtentry */
 267         u_int32_t rtm_inits;            /* which metrics we are initializing */
 268         struct rt_metrics rtm_rmx;      /* metrics themselves */
 269 };
 270
 271 #ifdef PRIVATE
 272 /*
 273  * Extended routing message header (private).
 274  */
 275 struct rt_msghdr_ext {
 276         u_short rtm_msglen;     /* to skip over non-understood messages */
 277         u_char  rtm_version;    /* future binary compatibility */
 278         u_char  rtm_type;       /* message type */
 279         u_int32_t rtm_index;    /* index for associated ifp */
 280         u_int32_t rtm_flags;    /* flags, incl. kern & message, e.g. DONE */
 281         u_int32_t rtm_reserved; /* for future use */
 282         u_int32_t rtm_addrs;    /* bitmask identifying sockaddrs in msg */
 283         pid_t   rtm_pid;        /* identify sender */
 284         int     rtm_seq;        /* for sender to identify action */
 285         int     rtm_errno;      /* why failed */
 286         u_int32_t rtm_use;      /* from rtentry */
 287         u_int32_t rtm_inits;    /* which metrics we are initializing */
 288         struct rt_metrics rtm_rmx;      /* metrics themselves */
 289         struct rt_reach_info rtm_ri;    /* route reachability info */
 290 };
 291 #endif /* PRIVATE */
 292
 293 #define RTM_VERSION     5       /* Up the ante and ignore older versions */
 294
 295 /*
 296  * Message types.
 297  */
 298 #define RTM_ADD         0x1     /* Add Route */
 299 #define RTM_DELETE      0x2     /* Delete Route */
 300 #define RTM_CHANGE      0x3     /* Change Metrics or flags */
 301 #define RTM_GET         0x4     /* Report Metrics */
 302 #define RTM_LOSING      0x5     /* Kernel Suspects Partitioning */
 303 #define RTM_REDIRECT    0x6     /* Told to use different route */
 304 #define RTM_MISS        0x7     /* Lookup failed on this address */
 305 #define RTM_LOCK        0x8     /* fix specified metrics */
 306 #define RTM_OLDADD      0x9     /* caused by SIOCADDRT */
 307 #define RTM_OLDDEL      0xa     /* caused by SIOCDELRT */
 308 #define RTM_RESOLVE     0xb     /* req to resolve dst to LL addr */
 309 #define RTM_NEWADDR     0xc     /* address being added to iface */
 310 #define RTM_DELADDR     0xd     /* address being removed from iface */
 311 #define RTM_IFINFO      0xe     /* iface going up/down etc. */
 312 #define RTM_NEWMADDR    0xf     /* mcast group membership being added to if */
 313 #define RTM_DELMADDR    0x10    /* mcast group membership being deleted */
 314 #ifdef PRIVATE
 315 #define RTM_GET_SILENT  0x11
 316 #endif /* PRIVATE */
 317 #define RTM_IFINFO2     0x12    /* */
 318 #define RTM_NEWMADDR2   0x13    /* */
 319 #define RTM_GET2        0x14    /* */
 320 #ifdef PRIVATE
 321 #define RTM_GET_EXT     0x15
 322 #endif /* PRIVATE */
 323
 324 /*
 325  * Bitmask values for rtm_inits and rmx_locks.
 326  */
 327 #define RTV_MTU         0x1     /* init or lock _mtu */
 328 #define RTV_HOPCOUNT    0x2     /* init or lock _hopcount */
 329 #define RTV_EXPIRE      0x4     /* init or lock _expire */
 330 #define RTV_RPIPE       0x8     /* init or lock _recvpipe */
 331 #define RTV_SPIPE       0x10    /* init or lock _sendpipe */
 332 #define RTV_SSTHRESH    0x20    /* init or lock _ssthresh */
 333 #define RTV_RTT         0x40    /* init or lock _rtt */
 334 #define RTV_RTTVAR      0x80    /* init or lock _rttvar */
 335
 336 /*
 337  * Bitmask values for rtm_addrs.
 338  */
 339 #define RTA_DST         0x1     /* destination sockaddr present */
 340 #define RTA_GATEWAY     0x2     /* gateway sockaddr present */
 341 #define RTA_NETMASK     0x4     /* netmask sockaddr present */
 342 #define RTA_GENMASK     0x8     /* cloning mask sockaddr present */
 343 #define RTA_IFP         0x10    /* interface name sockaddr present */
 344 #define RTA_IFA         0x20    /* interface addr sockaddr present */
 345 #define RTA_AUTHOR      0x40    /* sockaddr for author of redirect */
 346 #define RTA_BRD         0x80    /* for NEWADDR, broadcast or p-p dest addr */
 347
 348 /*
 349  * Index offsets for sockaddr array for alternate internal encoding.
 350  */
 351 #define RTAX_DST        0       /* destination sockaddr present */
 352 #define RTAX_GATEWAY    1       /* gateway sockaddr present */
 353 #define RTAX_NETMASK    2       /* netmask sockaddr present */
 354 #define RTAX_GENMASK    3       /* cloning mask sockaddr present */
 355 #define RTAX_IFP        4       /* interface name sockaddr present */
 356 #define RTAX_IFA        5       /* interface addr sockaddr present */
 357 #define RTAX_AUTHOR     6       /* sockaddr for author of redirect */
 358 #define RTAX_BRD        7       /* for NEWADDR, broadcast or p-p dest addr */
 359 #define RTAX_MAX        8       /* size of array to allocate */
 360
 361 struct rt_addrinfo {
 362         int     rti_addrs;
 363         struct  sockaddr *rti_info[RTAX_MAX];
 364 };
 365
 366 struct route_cb {
 367         int     ip_count;
 368         int     ip6_count;
 369         int     ipx_count;
 370         int     ns_count;
 371         int     iso_count;
 372         int     any_count;
 373 };
 374
 375 #ifdef PRIVATE
 376 /*
 377  * For scoped routing; a zero interface scope value means nil/no scope.
 378  */
 379 #define IFSCOPE_NONE    0
 380 #endif /* PRIVATE */
 381
 382 #ifdef KERNEL_PRIVATE
 383 /*
 384  * Generic call trace used by some subsystems (e.g. route, ifaddr)
 385  */
 386 #define CTRACE_STACK_SIZE       8               /* depth of stack trace */
 387 #define CTRACE_HIST_SIZE        4               /* refcnt history size */
 388 typedef struct ctrace {
 389         void    *th;                            /* thread ptr */
 390         void    *pc[CTRACE_STACK_SIZE];         /* PC stack trace */
 391 } ctrace_t;
 392
 393 extern void ctrace_record(ctrace_t *);
 394
 395 #define RT_LOCK_ASSERT_HELD(_rt)                                        \
 396         lck_mtx_assert(&(_rt)->rt_lock, LCK_MTX_ASSERT_OWNED)
 397
 398 #define RT_LOCK_ASSERT_NOTHELD(_rt)                                     \
 399         lck_mtx_assert(&(_rt)->rt_lock, LCK_MTX_ASSERT_NOTOWNED)
 400
 401 #define RT_LOCK(_rt) do {                                               \
 402         if (!rte_debug)                                                 \
 403                 lck_mtx_lock(&(_rt)->rt_lock);                          \
 404         else                                                            \
 405                 rt_lock(_rt, FALSE);                                    \
 406 } while (0)
 407
 408 #define RT_LOCK_SPIN(_rt) do {                                          \
 409         if (!rte_debug)                                                 \
 410                 lck_mtx_lock_spin(&(_rt)->rt_lock);                     \
 411         else                                                            \
 412                 rt_lock(_rt, TRUE);                                     \
 413 } while (0)
 414
 415 #define RT_CONVERT_LOCK(_rt) do {                                       \
 416         RT_LOCK_ASSERT_HELD(_rt);                                       \
 417         lck_mtx_convert_spin(&(_rt)->rt_lock);                          \
 418 } while (0)
 419
 420 #define RT_UNLOCK(_rt) do {                                             \
 421         if (!rte_debug)                                                 \
 422                 lck_mtx_unlock(&(_rt)->rt_lock);                        \
 423         else                                                            \
 424                 rt_unlock(_rt);                                         \
 425 } while (0)
 426
 427 #define RT_ADDREF_LOCKED(_rt) do {                                      \
 428         if (!rte_debug) {                                               \
 429                 RT_LOCK_ASSERT_HELD(_rt);                               \
 430                 if (++(_rt)->rt_refcnt == 0)                            \
 431                         panic("RT_ADDREF(%p) bad refcnt\n", _rt);       \
 432         } else {                                                        \
 433                 rtref(_rt);                                             \
 434         }                                                               \
 435 } while (0)
 436
 437 /*
 438  * Spin variant mutex is used here; caller is responsible for
 439  * converting any previously-held similar lock to full mutex.
 440  */
 441 #define RT_ADDREF(_rt) do {                                             \
 442         RT_LOCK_SPIN(_rt);                                              \
 443         RT_ADDREF_LOCKED(_rt);                                          \
 444         RT_UNLOCK(_rt);                                                 \
 445 } while (0)
 446
 447 #define RT_REMREF_LOCKED(_rt) do {                                      \
 448         if (!rte_debug) {                                               \
 449                 RT_LOCK_ASSERT_HELD(_rt);                               \
 450                 if ((_rt)->rt_refcnt == 0)                              \
 451                         panic("RT_REMREF(%p) bad refcnt\n", _rt);       \
 452                 --(_rt)->rt_refcnt;                                     \
 453         } else {                                                        \
 454                 (void) rtunref(_rt);                                    \
 455         }                                                               \
 456 } while (0)
 457
 458 /*
 459  * Spin variant mutex is used here; caller is responsible for
 460  * converting any previously-held similar lock to full mutex.
 461  */
 462 #define RT_REMREF(_rt) do {                                             \
 463         RT_LOCK_SPIN(_rt);                                              \
 464         RT_REMREF_LOCKED(_rt);                                          \
 465         RT_UNLOCK(_rt);                                                 \
 466 } while (0)
 467
 468 #define RTFREE(_rt)             rtfree(_rt)
 469 #define RTFREE_LOCKED(_rt)      rtfree_locked(_rt)
 470
 471 extern struct route_cb route_cb;
 472 extern struct radix_node_head *rt_tables[AF_MAX+1];
 473 __private_extern__ lck_mtx_t *rnh_lock;
 474 __private_extern__ int use_routegenid;
 475 __private_extern__ uint32_t route_generation;
 476 __private_extern__ int rttrash;
 477 __private_extern__ unsigned int rte_debug;
 478
 479 struct ifmultiaddr;
 480 struct proc;
 481
 482 extern void route_init(void) __attribute__((section("__TEXT, initcode")));
 483 extern void routegenid_update(void);
 484 extern void rt_ifmsg(struct ifnet *);
 485 extern void rt_missmsg(int, struct rt_addrinfo *, int, int);
 486 extern void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *);
 487 extern void rt_newmaddrmsg(int, struct ifmultiaddr *);
 488 extern int rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *);
 489 extern void set_primary_ifscope(int, unsigned int);
 490 extern unsigned int get_primary_ifscope(int);
 491 extern boolean_t rt_primary_default(struct rtentry *, struct sockaddr *);
 492 extern struct rtentry *rt_lookup(boolean_t, struct sockaddr *,
 493     struct sockaddr *, struct radix_node_head *, unsigned int);
 494 extern void rtalloc(struct route *);
 495 extern void rtalloc_scoped(struct route *, unsigned int);
 496 extern void rtalloc_ign(struct route *, uint32_t);
 497 extern void rtalloc_scoped_ign(struct route *, uint32_t, unsigned int);
 498 extern struct rtentry *rtalloc1(struct sockaddr *, int, uint32_t);
 499 extern struct rtentry *rtalloc1_scoped(struct sockaddr *, int, uint32_t,
 500     unsigned int);
 501 extern struct rtentry *rtalloc1_scoped_locked(struct sockaddr *, int,
 502     uint32_t, unsigned int);
 503 extern void rtfree(struct rtentry *);
 504 extern void rtfree_locked(struct rtentry *);
 505 extern void rtref(struct rtentry *);
 506 /*
 507  * rtunref will decrement the refcount, rtfree will decrement and free if
 508  * the refcount has reached zero and the route is not up.
 509  * Unless you have good reason to do otherwise, use rtfree.
 510  */
 511 extern int rtunref(struct rtentry *);
 512 extern void rtsetifa(struct rtentry *, struct ifaddr *);
 513 extern int rtinit(struct ifaddr *, int, int);
 514 extern int rtinit_locked(struct ifaddr *, int, int);
 515 extern int rtioctl(unsigned long, caddr_t, struct proc *);
 516 extern void rtredirect(struct ifnet *, struct sockaddr *, struct sockaddr *,
 517     struct sockaddr *, int, struct sockaddr *, struct rtentry **);
 518 extern int rtrequest(int, struct sockaddr *,
 519     struct sockaddr *, struct sockaddr *, int, struct rtentry **);
 520 extern int rtrequest_scoped(int, struct sockaddr *, struct sockaddr *,
 521     struct sockaddr *, int, struct rtentry **, unsigned int);
 522 extern int rtrequest_locked(int, struct sockaddr *,
 523     struct sockaddr *, struct sockaddr *, int, struct rtentry **);
 524 extern int rtrequest_scoped_locked(int, struct sockaddr *, struct sockaddr *,
 525     struct sockaddr *, int, struct rtentry **, unsigned int);
 526 extern void sin_set_ifscope(struct sockaddr *, unsigned int);
 527 extern unsigned int sin_get_ifscope(struct sockaddr *);
 528 extern unsigned int sin6_get_ifscope(struct sockaddr *);
 529 extern void rt_lock(struct rtentry *, boolean_t);
 530 extern void rt_unlock(struct rtentry *);
 531 extern struct sockaddr *rtm_scrub_ifscope(int, int, struct sockaddr *,
 532     struct sockaddr *, struct sockaddr_storage *);
 533 extern u_int64_t rt_expiry(struct rtentry *, u_int64_t, u_int32_t);
 534 extern void rt_set_idleref(struct rtentry *);
 535 extern void rt_clear_idleref(struct rtentry *);
 536 extern void rt_aggdrain(int);
 537 extern boolean_t rt_validate(struct rtentry *);
 538
 539 #ifdef XNU_KERNEL_PRIVATE
 540 extern void route_copyin(struct route *src, struct route *dst, size_t length);
 541 extern void route_copyout(struct route *dst, const struct route *src, size_t length);
 542 #endif /* XNU_KERNEL_PRIVATE */
 543
 544 #endif /* KERNEL_PRIVATE */
 545
 546 #endif