bsd/net/if_var.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1982, 1986, 1989, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      From: @(#)if.h  8.1 (Berkeley) 6/10/93
  58  * $FreeBSD: src/sys/net/if_var.h,v 1.18.2.7 2001/07/24 19:10:18 brooks Exp $
  59  */
  60
  61 #ifndef _NET_IF_VAR_H_
  62 #define _NET_IF_VAR_H_
  63 #include <sys/appleapiopts.h>
  64
  65 #ifdef __APPLE__
  66 #define APPLE_IF_FAM_LOOPBACK  1
  67 #define APPLE_IF_FAM_ETHERNET  2
  68 #define APPLE_IF_FAM_SLIP      3
  69 #define APPLE_IF_FAM_TUN       4
  70 #define APPLE_IF_FAM_VLAN      5
  71 #define APPLE_IF_FAM_PPP       6
  72 #define APPLE_IF_FAM_PVC       7
  73 #define APPLE_IF_FAM_DISC      8
  74 #define APPLE_IF_FAM_MDECAP    9
  75 #define APPLE_IF_FAM_GIF       10
  76 #define APPLE_IF_FAM_FAITH     11
  77 #define APPLE_IF_FAM_STF           12
  78 #endif
  79
  80 /*
  81  * Structures defining a network interface, providing a packet
  82  * transport mechanism (ala level 0 of the PUP protocols).
  83  *
  84  * Each interface accepts output datagrams of a specified maximum
  85  * length, and provides higher level routines with input datagrams
  86  * received from its medium.
  87  *
  88  * Output occurs when the routine if_output is called, with three parameters:
  89  *      (*ifp->if_output)(ifp, m, dst, rt)
  90  * Here m is the mbuf chain to be sent and dst is the destination address.
  91  * The output routine encapsulates the supplied datagram if necessary,
  92  * and then transmits it on its medium.
  93  *
  94  * On input, each interface unwraps the data received by it, and either
  95  * places it on the input queue of a internetwork datagram routine
  96  * and posts the associated software interrupt, or passes the datagram to a raw
  97  * packet input routine.
  98  *
  99  * Routines exist for locating interfaces by their addresses
 100  * or for locating a interface on a certain network, as well as more general
 101  * routing and gateway routines maintaining information used to locate
 102  * interfaces.  These routines live in the files if.c and route.c
 103  */
 104
 105 #ifdef __STDC__
 106 /*
 107  * Forward structure declarations for function prototypes [sic].
 108  */
 109 struct  mbuf;
 110 struct  proc;
 111 struct  rtentry;
 112 struct  socket;
 113 struct  ether_header;
 114 struct  sockaddr_dl;
 115 #endif
 116
 117 #define IFNAMSIZ        16
 118
 119 #include <sys/queue.h>          /* get TAILQ macros */
 120
 121 #ifdef __APPLE_API_UNSTABLE
 122 #ifdef __APPLE__
 123 struct tqdummy;
 124
 125 TAILQ_HEAD(tailq_head, tqdummy);
 126
 127 /* This belongs up in socket.h or socketvar.h, depending on how far the
 128  *   event bubbles up.
 129  */
 130
 131 struct net_event_data {
 132      u_long             if_family;
 133      u_long             if_unit;
 134      char               if_name[IFNAMSIZ];
 135 };
 136 #endif
 137
 138
 139 TAILQ_HEAD(ifnethead, ifnet);   /* we use TAILQs so that the order of */
 140 TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
 141 TAILQ_HEAD(ifprefixhead, ifprefix);
 142 LIST_HEAD(ifmultihead, ifmultiaddr);
 143
 144 #ifdef __APPLE__
 145 /*
 146  * Structure describing information about an interface
 147  * which may be of interest to management entities.
 148  */
 149 struct if_data {
 150         /* generic interface information */
 151         u_char  ifi_type;               /* ethernet, tokenring, etc */
 152 #ifdef __APPLE__
 153         u_char  ifi_typelen;            /* Length of frame type id */
 154 #endif
 155         u_char  ifi_physical;           /* e.g., AUI, Thinnet, 10base-T, etc */
 156         u_char  ifi_addrlen;            /* media address length */
 157         u_char  ifi_hdrlen;             /* media header length */
 158         u_char  ifi_recvquota;          /* polling quota for receive intrs */
 159         u_char  ifi_xmitquota;          /* polling quota for xmit intrs */
 160         u_long  ifi_mtu;                /* maximum transmission unit */
 161         u_long  ifi_metric;             /* routing metric (external only) */
 162         u_long  ifi_baudrate;           /* linespeed */
 163         /* volatile statistics */
 164         u_long  ifi_ipackets;           /* packets received on interface */
 165         u_long  ifi_ierrors;            /* input errors on interface */
 166         u_long  ifi_opackets;           /* packets sent on interface */
 167         u_long  ifi_oerrors;            /* output errors on interface */
 168         u_long  ifi_collisions;         /* collisions on csma interfaces */
 169         u_long  ifi_ibytes;             /* total number of octets received */
 170         u_long  ifi_obytes;             /* total number of octets sent */
 171         u_long  ifi_imcasts;            /* packets received via multicast */
 172         u_long  ifi_omcasts;            /* packets sent via multicast */
 173         u_long  ifi_iqdrops;            /* dropped on input, this interface */
 174         u_long  ifi_noproto;            /* destined for unsupported protocol */
 175 #ifdef __APPLE__
 176         u_long  ifi_recvtiming;         /* usec spent receiving when timing */
 177         u_long  ifi_xmittiming;         /* usec spent xmitting when timing */
 178 #endif
 179         struct  timeval ifi_lastchange; /* time of last administrative change */
 180 #ifdef __APPLE__
 181         u_long  default_proto;          /* Default dl_tag when none is specified
 182                                                                  * on dlil_output */
 183 #endif
 184         u_long  ifi_hwassist;           /* HW offload capabilities */
 185         u_long  ifi_reserved1;          /* for future use */
 186         u_long  ifi_reserved2;          /* for future use */
 187 };
 188 #endif
 189
 190 /*
 191  * Structure defining a queue for a network interface.
 192  */
 193 struct  ifqueue {
 194         struct  mbuf *ifq_head;
 195         struct  mbuf *ifq_tail;
 196         int     ifq_len;
 197         int     ifq_maxlen;
 198         int     ifq_drops;
 199 };
 200
 201 /*
 202  * Structure defining a network interface.
 203  *
 204  * (Would like to call this struct ``if'', but C isn't PL/1.)
 205  */
 206 struct ifnet {
 207         void    *if_softc;              /* pointer to driver state */
 208         char    *if_name;               /* name, e.g. ``en'' or ``lo'' */
 209         TAILQ_ENTRY(ifnet) if_link;     /* all struct ifnets are chained */
 210         struct  ifaddrhead if_addrhead; /* linked list of addresses per if */
 211 #ifdef __APPLE__
 212         struct  tailq_head proto_head;  /* Head for if_proto structures */
 213 #endif
 214         int     if_pcount;              /* number of promiscuous listeners */
 215         struct  bpf_if *if_bpf;         /* packet filter structure */
 216         u_short if_index;               /* numeric abbreviation for this if  */
 217         short   if_unit;                /* sub-unit for lower level driver */
 218         short   if_timer;               /* time 'til if_watchdog called */
 219         short   if_flags;               /* up/down, broadcast, etc. */
 220         int     if_ipending;            /* interrupts pending */
 221         void    *if_linkmib;            /* link-type-specific MIB data */
 222         size_t  if_linkmiblen;          /* length of above data */
 223         struct  if_data if_data;
 224
 225 #ifdef __APPLE__
 226 /* New with DLIL */
 227         int     refcnt;
 228         int     offercnt;
 229         int     (*if_output)(struct ifnet *ifnet_ptr, struct mbuf *m);
 230         int     (*if_ioctl)(struct ifnet *ifnet_ptr, u_long  ioctl_code, void  *ioctl_arg);
 231         int     (*if_set_bpf_tap)(struct ifnet *ifp, int mode,
 232                                   int (*bpf_callback)(struct ifnet *, struct mbuf *));
 233         int     (*if_free)(struct ifnet *ifnet_ptr);
 234         int     (*if_demux)(struct ifnet  *ifnet_ptr, struct mbuf  *mbuf_ptr,
 235                             char *frame_ptr, void  *if_proto_ptr);
 236
 237         int     (*if_event)(struct ifnet  *ifnet_ptr, caddr_t  event_ptr);
 238
 239         int     (*if_framer)(struct ifnet    *ifp,
 240                              struct mbuf     **m,
 241                              struct sockaddr *dest,
 242                              char            *dest_linkaddr,
 243                              char            *frame_type);
 244
 245         u_long  if_family;              /* ulong assigned by Apple */
 246         struct tailq_head   if_flt_head;
 247
 248 /* End DLIL specific */
 249
 250         void    *reserved0;     /* for future use */
 251         void    *if_private;    /* private to interface */
 252         long    if_eflags;              /* autoaddr, autoaddr done, etc. */
 253 #endif /* __APPLE__ */
 254
 255         struct  ifmultihead if_multiaddrs; /* multicast addresses configured */
 256         int     if_amcount;             /* number of all-multicast requests */
 257 /* procedure handles */
 258 #ifndef __APPLE__
 259         int     (*if_output)            /* output routine (enqueue) */
 260                 __P((struct ifnet *, struct mbuf *, struct sockaddr *,
 261                      struct rtentry *));
 262         void    (*if_start)             /* initiate output routine */
 263                 __P((struct ifnet *));
 264         int     (*if_done)              /* output complete routine */
 265                 __P((struct ifnet *));  /* (XXX not used; fake prototype) */
 266         int     (*if_ioctl)             /* ioctl routine */
 267                 __P((struct ifnet *, u_long, caddr_t));
 268         void    (*if_watchdog)          /* timer routine */
 269                 __P((struct ifnet *));
 270 #endif
 271         int     (*if_poll_recv)         /* polled receive routine */
 272                 __P((struct ifnet *, int *));
 273         int     (*if_poll_xmit)         /* polled transmit routine */
 274                 __P((struct ifnet *, int *));
 275         void    (*if_poll_intren)       /* polled interrupt reenable routine */
 276                 __P((struct ifnet *));
 277         void    (*if_poll_slowinput)    /* input routine for slow devices */
 278                 __P((struct ifnet *, struct mbuf *));
 279         void    (*if_init)              /* Init routine */
 280                 __P((void *));
 281         int     (*if_resolvemulti)      /* validate/resolve multicast */
 282                 __P((struct ifnet *, struct sockaddr **, struct sockaddr *));
 283         struct  ifqueue if_snd;         /* output queue */
 284         struct  ifqueue *if_poll_slowq; /* input queue for slow devices */
 285 #ifdef __APPLE__
 286         u_long  family_cookie;
 287         struct  ifprefixhead if_prefixhead; /* list of prefixes per if */
 288         void *reserved1;        /* for future use */
 289 #else
 290         struct  ifprefixhead if_prefixhead; /* list of prefixes per if */
 291 #endif /* __APPLE__ */
 292 };
 293 typedef void if_init_f_t __P((void *));
 294
 295 #define if_mtu          if_data.ifi_mtu
 296 #define if_type         if_data.ifi_type
 297 #define if_typelen      if_data.ifi_typelen
 298 #define if_physical     if_data.ifi_physical
 299 #define if_addrlen      if_data.ifi_addrlen
 300 #define if_hdrlen       if_data.ifi_hdrlen
 301 #define if_metric       if_data.ifi_metric
 302 #define if_baudrate     if_data.ifi_baudrate
 303 #define if_hwassist     if_data.ifi_hwassist
 304 #define if_ipackets     if_data.ifi_ipackets
 305 #define if_ierrors      if_data.ifi_ierrors
 306 #define if_opackets     if_data.ifi_opackets
 307 #define if_oerrors      if_data.ifi_oerrors
 308 #define if_collisions   if_data.ifi_collisions
 309 #define if_ibytes       if_data.ifi_ibytes
 310 #define if_obytes       if_data.ifi_obytes
 311 #define if_imcasts      if_data.ifi_imcasts
 312 #define if_omcasts      if_data.ifi_omcasts
 313 #define if_iqdrops      if_data.ifi_iqdrops
 314 #define if_noproto      if_data.ifi_noproto
 315 #define if_lastchange   if_data.ifi_lastchange
 316 #define if_recvquota    if_data.ifi_recvquota
 317 #define if_xmitquota    if_data.ifi_xmitquota
 318 #define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0)
 319
 320 #ifndef __APPLE__
 321 /* for compatibility with other BSDs */
 322 #define if_addrlist     if_addrhead
 323 #define if_list         if_link
 324 #endif
 325
 326 /*
 327  * Bit values in if_ipending
 328  */
 329 #define IFI_RECV        1       /* I want to receive */
 330 #define IFI_XMIT        2       /* I want to transmit */
 331
 332 /*
 333  * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
 334  * are queues of messages stored on ifqueue structures
 335  * (defined above).  Entries are added to and deleted from these structures
 336  * by these macros, which should be called with ipl raised to splimp().
 337  */
 338 #define IF_QFULL(ifq)           ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
 339 #define IF_DROP(ifq)            ((ifq)->ifq_drops++)
 340 #define IF_ENQUEUE(ifq, m) { \
 341         (m)->m_nextpkt = 0; \
 342         if ((ifq)->ifq_tail == 0) \
 343                 (ifq)->ifq_head = m; \
 344         else \
 345                 (ifq)->ifq_tail->m_nextpkt = m; \
 346         (ifq)->ifq_tail = m; \
 347         (ifq)->ifq_len++; \
 348 }
 349 #define IF_PREPEND(ifq, m) { \
 350         (m)->m_nextpkt = (ifq)->ifq_head; \
 351         if ((ifq)->ifq_tail == 0) \
 352                 (ifq)->ifq_tail = (m); \
 353         (ifq)->ifq_head = (m); \
 354         (ifq)->ifq_len++; \
 355 }
 356 #define IF_DEQUEUE(ifq, m) { \
 357         (m) = (ifq)->ifq_head; \
 358         if (m) { \
 359                 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
 360                         (ifq)->ifq_tail = 0; \
 361                 (m)->m_nextpkt = 0; \
 362                 (ifq)->ifq_len--; \
 363         } \
 364 }
 365
 366 #ifdef KERNEL
 367 #define IF_ENQ_DROP(ifq, m)     if_enq_drop(ifq, m)
 368
 369 #if defined(__GNUC__) && defined(MT_HEADER)
 370 static __inline int
 371 if_queue_drop(struct ifqueue *ifq, struct mbuf *m)
 372 {
 373         IF_DROP(ifq);
 374         return 0;
 375 }
 376
 377 static __inline int
 378 if_enq_drop(struct ifqueue *ifq, struct mbuf *m)
 379 {
 380         if (IF_QFULL(ifq) &&
 381             !if_queue_drop(ifq, m))
 382                 return 0;
 383         IF_ENQUEUE(ifq, m);
 384         return 1;
 385 }
 386 #else
 387
 388 #ifdef MT_HEADER
 389 int     if_enq_drop __P((struct ifqueue *, struct mbuf *));
 390 #endif
 391
 392 #endif
 393 #endif /* __APPLE_API_UNSTABLE */
 394
 395 /*
 396  * 72 was chosen below because it is the size of a TCP/IP
 397  * header (40) + the minimum mss (32).
 398  */
 399 #define IF_MINMTU       72
 400 #define IF_MAXMTU       65535
 401
 402 #endif /* KERNEL */
 403
 404 #ifdef __APPLE_API_UNSTABLE
 405 /*
 406  * The ifaddr structure contains information about one address
 407  * of an interface.  They are maintained by the different address families,
 408  * are allocated and attached when an address is set, and are linked
 409  * together so all addresses for an interface can be located.
 410  */
 411 struct ifaddr {
 412         struct  sockaddr *ifa_addr;     /* address of interface */
 413         struct  sockaddr *ifa_dstaddr;  /* other end of p-to-p link */
 414 #define ifa_broadaddr   ifa_dstaddr     /* broadcast address interface */
 415         struct  sockaddr *ifa_netmask;  /* used to determine subnet */
 416 #ifndef __APPLE__
 417         /* Use of if_data doesn't justify change of API */
 418         struct  if_data if_data;        /* not all members are meaningful */
 419 #endif
 420         struct  ifnet *ifa_ifp;         /* back-pointer to interface */
 421         TAILQ_ENTRY(ifaddr) ifa_link;   /* queue macro glue */
 422         void    (*ifa_rtrequest)        /* check or clean routes (+ or -)'d */
 423                 __P((int, struct rtentry *, struct sockaddr *));
 424         u_short ifa_flags;              /* mostly rt_flags for cloning */
 425         short   ifa_refcnt;/* 16bit ref count, use ifaref, ifafree */
 426         int     ifa_metric;             /* cost of going out this interface */
 427 #ifdef notdef
 428         struct  rtentry *ifa_rt;        /* XXXX for ROUTETOIF ????? */
 429 #endif
 430         u_long  ifa_dlt;
 431         int (*ifa_claim_addr)           /* check if an addr goes to this if */
 432                 __P((struct ifaddr *, struct sockaddr *));
 433 };
 434 #define IFA_ROUTE       RTF_UP          /* route installed */
 435
 436 /*
 437  * The prefix structure contains information about one prefix
 438  * of an interface.  They are maintained by the different address families,
 439  * are allocated and attached when an prefix or an address is set,
 440  * and are linked together so all prefixes for an interface can be located.
 441  */
 442 struct ifprefix {
 443         struct  sockaddr *ifpr_prefix;  /* prefix of interface */
 444         struct  ifnet *ifpr_ifp;        /* back-pointer to interface */
 445         TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */
 446         u_char  ifpr_plen;              /* prefix length in bits */
 447         u_char  ifpr_type;              /* protocol dependent prefix type */
 448 };
 449
 450 /*
 451  * Multicast address structure.  This is analogous to the ifaddr
 452  * structure except that it keeps track of multicast addresses.
 453  * Also, the reference count here is a count of requests for this
 454  * address, not a count of pointers to this structure.
 455  */
 456 struct ifmultiaddr {
 457         LIST_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
 458         struct  sockaddr *ifma_addr;    /* address this membership is for */
 459         struct  sockaddr *ifma_lladdr;  /* link-layer translation, if any */
 460         struct  ifnet *ifma_ifp;        /* back-pointer to interface */
 461         u_int   ifma_refcount;          /* reference count */
 462         void    *ifma_protospec;        /* protocol-specific state, if any */
 463 };
 464
 465 #ifdef KERNEL
 466 #define IFAREF(ifa) ifaref(ifa)
 467 #define IFAFREE(ifa) ifafree(ifa)
 468
 469 #ifdef __APPLE_API_PRIVATE
 470 extern  struct ifnethead ifnet;
 471 extern struct   ifnet   **ifindex2ifnet;
 472 extern  int ifqmaxlen;
 473 extern  struct ifnet loif[];
 474 extern  int if_index;
 475 extern  struct ifaddr **ifnet_addrs;
 476 #endif /* __APPLE_API_PRIVATE */
 477
 478 #ifndef __APPLE__
 479 void    ether_ifattach __P((struct ifnet *, int));
 480 void    ether_ifdetach __P((struct ifnet *, int));
 481 void    ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
 482 void    ether_demux __P((struct ifnet *, struct ether_header *, struct mbuf *));
 483 int     ether_output __P((struct ifnet *,
 484            struct mbuf *, struct sockaddr *, struct rtentry *));
 485 int     ether_output_frame __P((struct ifnet *, struct mbuf *));
 486 int     ether_ioctl __P((struct ifnet *, int, caddr_t));
 487 #endif
 488
 489 int     if_addmulti __P((struct ifnet *, struct sockaddr *,
 490                          struct ifmultiaddr **));
 491 int     if_allmulti __P((struct ifnet *, int));
 492 void    if_attach __P((struct ifnet *));
 493 int     if_delmulti __P((struct ifnet *, struct sockaddr *));
 494 void    if_down __P((struct ifnet *));
 495 void    if_route __P((struct ifnet *, int flag, int fam));
 496 void    if_unroute __P((struct ifnet *, int flag, int fam));
 497 void    if_up __P((struct ifnet *));
 498 /*void  ifinit __P((void));*/ /* declared in systm.h for main() */
 499 int     ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
 500 int     ifpromisc __P((struct ifnet *, int));
 501 struct  ifnet *ifunit __P((const char *));
 502 struct  ifnet *if_withname __P((struct sockaddr *));
 503
 504 int     if_poll_recv_slow __P((struct ifnet *ifp, int *quotap));
 505 void    if_poll_xmit_slow __P((struct ifnet *ifp, int *quotap));
 506 void    if_poll_throttle __P((void));
 507 void    if_poll_unthrottle __P((void *));
 508 void    if_poll_init __P((void));
 509 void    if_poll __P((void));
 510
 511 struct  ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
 512 struct  ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
 513 struct  ifaddr *ifa_ifwithnet __P((struct sockaddr *));
 514 struct  ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
 515                                         struct sockaddr *));
 516 struct  ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
 517 void    ifafree __P((struct ifaddr *));
 518 void    ifaref __P((struct ifaddr *));
 519
 520 struct  ifmultiaddr *ifmaof_ifpforaddr __P((struct sockaddr *,
 521                                             struct ifnet *));
 522 #ifndef __APPLE__
 523 int     if_simloop __P((struct ifnet *ifp, struct mbuf *m,
 524                 struct sockaddr *dst, int hlen));
 525 #endif
 526
 527 #endif /* KERNEL */
 528
 529
 530 #endif /* __APPLE_API_UNSTABLE */
 531 #endif /* !_NET_IF_VAR_H_ */