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Annotation of kernel/bsd/net/if.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Copyright (c) 1997, 1998 Apple Computer, Inc. All Rights Reserved */
        !            26: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            27: /*
        !            28:  * Copyright (c) 1982, 1986, 1989, 1993
        !            29:  *     The Regents of the University of California.  All rights reserved.
        !            30:  *
        !            31:  * Redistribution and use in source and binary forms, with or without
        !            32:  * modification, are permitted provided that the following conditions
        !            33:  * are met:
        !            34:  * 1. Redistributions of source code must retain the above copyright
        !            35:  *    notice, this list of conditions and the following disclaimer.
        !            36:  * 2. Redistributions in binary form must reproduce the above copyright
        !            37:  *    notice, this list of conditions and the following disclaimer in the
        !            38:  *    documentation and/or other materials provided with the distribution.
        !            39:  * 3. All advertising materials mentioning features or use of this software
        !            40:  *    must display the following acknowledgement:
        !            41:  *     This product includes software developed by the University of
        !            42:  *     California, Berkeley and its contributors.
        !            43:  * 4. Neither the name of the University nor the names of its contributors
        !            44:  *    may be used to endorse or promote products derived from this software
        !            45:  *    without specific prior written permission.
        !            46:  *
        !            47:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            48:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            49:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            50:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            51:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            52:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            53:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            54:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            55:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            56:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            57:  * SUCH DAMAGE.
        !            58:  *
        !            59:  *     @(#)if.h        8.3 (Berkeley) 2/9/95
        !            60:  */
        !            61: 
        !            62: /*
        !            63:  * Structures defining a network interface, providing a packet
        !            64:  * transport mechanism (ala level 0 of the PUP protocols).
        !            65:  *
        !            66:  * Each interface accepts output datagrams of a specified maximum
        !            67:  * length, and provides higher level routines with input datagrams
        !            68:  * received from its medium.
        !            69:  *
        !            70:  * Output occurs when the routine if_output is called, with four parameters:
        !            71:  *     (*ifp->if_output)(ifp, m, dst, rt)
        !            72:  * Here m is the mbuf chain to be sent and dst is the destination address.
        !            73:  * The output routine encapsulates the supplied datagram if necessary,
        !            74:  * and then transmits it on its medium.
        !            75:  *
        !            76:  * On input, each interface unwraps the data received by it, and either
        !            77:  * places it on the input queue of a internetwork datagram routine
        !            78:  * and posts the associated software interrupt, or passes the datagram to a raw
        !            79:  * packet input routine.
        !            80:  *
        !            81:  * Routines exist for locating interfaces by their addresses
        !            82:  * or for locating a interface on a certain network, as well as more general
        !            83:  * routing and gateway routines maintaining information used to locate
        !            84:  * interfaces.  These routines live in the files if.c and route.c
        !            85:  */
        !            86: /*  XXX fast fix for SNMP, going away soon */
        !            87: #ifndef _NET_IF_H
        !            88: #define _NET_IF_H
        !            89: #include <sys/time.h>
        !            90: 
        !            91: #ifdef __STDC__
        !            92: /*
        !            93:  * Forward structure declarations for function prototypes [sic].
        !            94:  */
        !            95: struct mbuf;
        !            96: struct proc;
        !            97: struct rtentry;        
        !            98: struct socket;
        !            99: struct ether_header;
        !           100: #endif
        !           101: 
        !           102: /*
        !           103:  * Structure defining statistics and other data kept regarding a network
        !           104:  * a network interface.
        !           105:  */
        !           106: 
        !           107: struct if_data {
        !           108: /* generic interface information */
        !           109:                u_char  ifi_type;       /* ethernet, tokenring, etc */
        !           110:                u_char  ifi_addrlen;    /* media address length */
        !           111:                u_char  ifi_hdrlen;     /* media header length */
        !           112:                u_long  ifi_mtu;        /* maximum transmission unit */
        !           113:                u_long  ifi_metric;     /* routing metric (external only) */
        !           114:                u_long  ifi_baudrate;   /* linespeed */
        !           115: /* volatile statistics */
        !           116:                u_long  ifi_ipackets;   /* packets received on interface */
        !           117:                u_long  ifi_ierrors;    /* input errors on interface */
        !           118:                u_long  ifi_opackets;   /* packets sent on interface */
        !           119:                u_long  ifi_oerrors;    /* output errors on interface */
        !           120:                u_long  ifi_collisions; /* collisions on csma interfaces */
        !           121:                u_long  ifi_ibytes;     /* total number of octets received */
        !           122:                u_long  ifi_obytes;     /* total number of octets sent */
        !           123:                u_long  ifi_imcasts;    /* packets received via multicast */
        !           124:                u_long  ifi_omcasts;    /* packets sent via multicast */
        !           125:                u_long  ifi_iqdrops;    /* dropped on input, this interface */
        !           126:                u_long  ifi_noproto;    /* destined for unsupported protocol */
        !           127:                struct  timeval ifi_lastchange;/* last updated */
        !           128: };
        !           129: 
        !           130: /*
        !           131:  * Structure describing information about an interface
        !           132:  * which may be of interest to management entities.
        !           133:  */
        !           134: /*
        !           135:  * Structure defining a queue for a network interface.
        !           136:  *
        !           137:  * (Would like to call this struct ``if'', but C isn't PL/1.)
        !           138:  */
        !           139: 
        !           140: struct ifnet {
        !           141:        char    *if_name;               /* name, e.g. ``en'' or ``lo'' */
        !           142:        struct  ifnet *if_next;         /* all struct ifnets are chained */
        !           143:        struct  ifaddr *if_addrlist;    /* linked list of addresses per if */
        !           144:        int     if_pcount;              /* number of promiscuous listeners */
        !           145:        caddr_t if_bpf;                 /* packet filter structure */
        !           146:        u_short if_index;               /* numeric abbreviation for this if */
        !           147:        short   if_unit;                /* sub-unit for lower level driver */
        !           148:        short   if_timer;               /* time 'til if_watchdog called */
        !           149:        short   if_flags;               /* up/down, broadcast, etc. */
        !           150:        struct if_data  if_data;
        !           151: #if defined(ppc)
        !           152:        void    *if_Y;                  /* For Y-adapter connection */
        !           153: #endif /* ppc */
        !           154:        void    *if_private;            /* private to interface */
        !           155: /* procedure handles */
        !           156:        int     (*if_init)              /* init routine */
        !           157:                __P((int));
        !           158:        int     (*if_output)            /* output routine (enqueue) */
        !           159:                __P((struct ifnet *, struct mbuf *, struct sockaddr *,
        !           160:                     struct rtentry *));
        !           161:        int     (*if_start)             /* initiate output routine */
        !           162:                __P((struct ifnet *));
        !           163: #if    __APPLE__
        !           164:        long    if_eflags;              /* autoaddr, autoaddr done, etc. */
        !           165: #else
        !           166:        int     (*if_done)              /* output complete routine */
        !           167:                __P((struct ifnet *));  /* (XXX not used; fake prototype) */
        !           168: #endif
        !           169:        int     (*if_ioctl)             /* ioctl routine */
        !           170:                __P((struct ifnet *, u_long, caddr_t));
        !           171:        int     (*if_reset)     
        !           172:                __P((int));             /* new autoconfig will permit removal */
        !           173:        int     (*if_watchdog)          /* timer routine */
        !           174:                __P((int));
        !           175:        struct  ifqueue {
        !           176:                struct  mbuf *ifq_head;
        !           177:                struct  mbuf *ifq_tail;
        !           178:                int     ifq_len;
        !           179:                int     ifq_maxlen;
        !           180:                int     ifq_drops;
        !           181:        } if_snd;                       /* output queue */
        !           182: };
        !           183: #define        if_mtu          if_data.ifi_mtu
        !           184: #define        if_type         if_data.ifi_type
        !           185: #define        if_addrlen      if_data.ifi_addrlen
        !           186: #define        if_hdrlen       if_data.ifi_hdrlen
        !           187: #define        if_metric       if_data.ifi_metric
        !           188: #define        if_baudrate     if_data.ifi_baudrate
        !           189: #define        if_ipackets     if_data.ifi_ipackets
        !           190: #define        if_ierrors      if_data.ifi_ierrors
        !           191: #define        if_opackets     if_data.ifi_opackets
        !           192: #define        if_oerrors      if_data.ifi_oerrors
        !           193: #define        if_collisions   if_data.ifi_collisions
        !           194: #define        if_ibytes       if_data.ifi_ibytes
        !           195: #define        if_obytes       if_data.ifi_obytes
        !           196: #define        if_imcasts      if_data.ifi_imcasts
        !           197: #define        if_omcasts      if_data.ifi_omcasts
        !           198: #define        if_iqdrops      if_data.ifi_iqdrops
        !           199: #define        if_noproto      if_data.ifi_noproto
        !           200: #define        if_lastchange   if_data.ifi_lastchange
        !           201: 
        !           202: #define        IFF_UP          0x1             /* interface is up */
        !           203: #define        IFF_BROADCAST   0x2             /* broadcast address valid */
        !           204: #define        IFF_DEBUG       0x4             /* turn on debugging */
        !           205: #define        IFF_LOOPBACK    0x8             /* is a loopback net */
        !           206: #define        IFF_POINTOPOINT 0x10            /* interface is point-to-point link */
        !           207: #define        IFF_NOTRAILERS  0x20            /* avoid use of trailers */
        !           208: #define        IFF_RUNNING     0x40            /* resources allocated */
        !           209: #define        IFF_NOARP       0x80            /* no address resolution protocol */
        !           210: #define        IFF_PROMISC     0x100           /* receive all packets */
        !           211: #define        IFF_ALLMULTI    0x200           /* receive all multicast packets */
        !           212: #define        IFF_OACTIVE     0x400           /* transmission in progress */
        !           213: #define        IFF_SIMPLEX     0x800           /* can't hear own transmissions */
        !           214: #define        IFF_LINK0       0x1000          /* per link layer defined bit */
        !           215: #define        IFF_LINK1       0x2000          /* per link layer defined bit */
        !           216: #define        IFF_LINK2       0x4000          /* per link layer defined bit */
        !           217: #if defined(ppc)
        !           218: #define IFF_SPLITTER   IFF_LINK2       /* Y splitter in force */
        !           219: #endif /* ppc */
        !           220: 
        !           221: #define        IFF_MULTICAST   0x8000          /* supports multicast */
        !           222: 
        !           223: 
        !           224: #define        IFEF_AUTOCONF           0x1     /* auto-configuring the interface */
        !           225: #define        IFEF_AUTOCONF_DONE      0x2     /* interface has been auto-configured */
        !           226: #define        IFEF_NETMASK_AUTH       0x4     /* authoritative ICMP netmask server */
        !           227: #define IFEF_AWAITING_NETMASK  0x8     /* ready to accept netmask reply */
        !           228: #define IFEF_NEEDMASK          0x10    /* Still need a subnet mask - not used yet */
        !           229: #define IFEF_DVR_REENTRY_OK    0x20    /* When set, driver may be reentered from its own thread */
        !           230: 
        !           231: 
        !           232: /* flags set internally only: */
        !           233: #define        IFF_CANTCHANGE \
        !           234:        (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
        !           235:            IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI)
        !           236: 
        !           237: /*
        !           238:  * Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
        !           239:  * input routines have queues of messages stored on ifqueue structures
        !           240:  * (defined above).  Entries are added to and deleted from these structures
        !           241:  * by these macros, which should be called with ipl raised to splimp().
        !           242:  */
        !           243: #define        IF_QFULL(ifq)           ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
        !           244: #define        IF_DROP(ifq)            ((ifq)->ifq_drops++)
        !           245: #define        IF_ENQUEUE(ifq, m) { \
        !           246:        (m)->m_nextpkt = 0; \
        !           247:        if ((ifq)->ifq_tail == 0) \
        !           248:                (ifq)->ifq_head = m; \
        !           249:        else \
        !           250:                (ifq)->ifq_tail->m_nextpkt = m; \
        !           251:        (ifq)->ifq_tail = m; \
        !           252:        (ifq)->ifq_len++; \
        !           253: }
        !           254: #define        IF_PREPEND(ifq, m) { \
        !           255:        (m)->m_nextpkt = (ifq)->ifq_head; \
        !           256:        if ((ifq)->ifq_tail == 0) \
        !           257:                (ifq)->ifq_tail = (m); \
        !           258:        (ifq)->ifq_head = (m); \
        !           259:        (ifq)->ifq_len++; \
        !           260: }
        !           261: #define        IF_DEQUEUE(ifq, m) { \
        !           262:        (m) = (ifq)->ifq_head; \
        !           263:        if (m) { \
        !           264:                if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
        !           265:                        (ifq)->ifq_tail = 0; \
        !           266:                (m)->m_nextpkt = 0; \
        !           267:                (ifq)->ifq_len--; \
        !           268:        } \
        !           269: }
        !           270: 
        !           271: #define        IFQ_MAXLEN      50
        !           272: #define        IFNET_SLOWHZ    1               /* granularity is 1 second */
        !           273: 
        !           274: /*
        !           275:  * The ifaddr structure contains information about one address
        !           276:  * of an interface.  They are maintained by the different address families,
        !           277:  * are allocated and attached when an address is set, and are linked
        !           278:  * together so all addresses for an interface can be located.
        !           279:  */
        !           280: struct ifaddr {
        !           281:        struct  sockaddr *ifa_addr;     /* address of interface */
        !           282:        struct  sockaddr *ifa_dstaddr;  /* other end of p-to-p link */
        !           283: #define        ifa_broadaddr   ifa_dstaddr     /* broadcast address interface */
        !           284:        struct  sockaddr *ifa_netmask;  /* used to determine subnet */
        !           285:        struct  ifnet *ifa_ifp;         /* back-pointer to interface */
        !           286:        struct  ifaddr *ifa_next;       /* next address for interface */
        !           287:        void    (*ifa_rtrequest)();     /* check or clean routes (+ or -)'d */
        !           288:        u_short ifa_flags;              /* mostly rt_flags for cloning */
        !           289:        short   ifa_refcnt;             /* extra to malloc for link info */
        !           290:        int     ifa_metric;             /* cost of going out this interface */
        !           291: #ifdef notdef
        !           292:        struct  rtentry *ifa_rt;        /* XXXX for ROUTETOIF ????? */
        !           293: #endif
        !           294: };
        !           295: #define        IFA_ROUTE       RTF_UP          /* route installed */
        !           296: 
        !           297: /*
        !           298:  * Message format for use in obtaining information about interfaces
        !           299:  * from getkerninfo and the routing socket
        !           300:  */
        !           301: struct if_msghdr {
        !           302:        u_short ifm_msglen;     /* to skip over non-understood messages */
        !           303:        u_char  ifm_version;    /* future binary compatability */
        !           304:        u_char  ifm_type;       /* message type */
        !           305:        int     ifm_addrs;      /* like rtm_addrs */
        !           306:        int     ifm_flags;      /* value of if_flags */
        !           307:        u_short ifm_index;      /* index for associated ifp */
        !           308:        struct  if_data ifm_data;/* statistics and other data about if */
        !           309: };
        !           310: 
        !           311: /*
        !           312:  * Message format for use in obtaining information about interface addresses
        !           313:  * from getkerninfo and the routing socket
        !           314:  */
        !           315: struct ifa_msghdr {
        !           316:        u_short ifam_msglen;    /* to skip over non-understood messages */
        !           317:        u_char  ifam_version;   /* future binary compatability */
        !           318:        u_char  ifam_type;      /* message type */
        !           319:        int     ifam_addrs;     /* like rtm_addrs */
        !           320:        int     ifam_flags;     /* value of ifa_flags */
        !           321:        u_short ifam_index;     /* index for associated ifp */
        !           322:        int     ifam_metric;    /* value of ifa_metric */
        !           323: };
        !           324: 
        !           325: /*
        !           326:  * Interface request structure used for socket
        !           327:  * ioctl's.  All interface ioctl's must have parameter
        !           328:  * definitions which begin with ifr_name.  The
        !           329:  * remainder may be interface specific.
        !           330:  */
        !           331: struct ifreq {
        !           332: #define        IFNAMSIZ        16
        !           333:        char    ifr_name[IFNAMSIZ];             /* if name, e.g. "en0" */
        !           334:        union {
        !           335:                struct  sockaddr ifru_addr;
        !           336:                struct  sockaddr ifru_dstaddr;
        !           337:                struct  sockaddr ifru_broadaddr;
        !           338:                short   ifru_flags;
        !           339:                int     ifru_metric;
        !           340:                int     ifru_mtu;
        !           341:                int     ifru_phys;
        !           342:                int     ifru_media;
        !           343:                caddr_t ifru_data;
        !           344:        } ifr_ifru;
        !           345: #define        ifr_addr        ifr_ifru.ifru_addr      /* address */
        !           346: #define        ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-to-p link */
        !           347: #define        ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address */
        !           348: #define        ifr_flags       ifr_ifru.ifru_flags     /* flags */
        !           349: #define        ifr_metric      ifr_ifru.ifru_metric    /* metric */
        !           350: #define        ifr_mtu         ifr_ifru.ifru_mtu       /* mtu */
        !           351: #define ifr_phys       ifr_ifru.ifru_phys      /* physical wire */
        !           352: #define ifr_media      ifr_ifru.ifru_media     /* physical media */
        !           353: #define        ifr_data        ifr_ifru.ifru_data      /* for use by interface */
        !           354: };
        !           355: 
        !           356: struct ifaliasreq {
        !           357:        char    ifra_name[IFNAMSIZ];            /* if name, e.g. "en0" */
        !           358:        struct  sockaddr ifra_addr;
        !           359:        struct  sockaddr ifra_broadaddr;
        !           360:        struct  sockaddr ifra_mask;
        !           361: };
        !           362: 
        !           363: struct ifmediareq {
        !           364:        char    ifm_name[IFNAMSIZ];     /* if name, e.g. "en0" */
        !           365:        int     ifm_current;            /* current media options */
        !           366:        int     ifm_mask;               /* don't care mask */
        !           367:        int     ifm_status;             /* media status */
        !           368:        int     ifm_active;             /* active options */
        !           369:        int     ifm_count;              /* # entries in ifm_ulist array */
        !           370:        int     *ifm_ulist;             /* media words */
        !           371: };
        !           372: 
        !           373: /*
        !           374:  * Structure used in SIOCGIFCONF request.
        !           375:  * Used to retrieve interface configuration
        !           376:  * for machine (useful for programs which
        !           377:  * must know all networks accessible).
        !           378:  */
        !           379: struct ifconf {
        !           380:        int     ifc_len;                /* size of associated buffer */
        !           381:        union {
        !           382:                caddr_t ifcu_buf;
        !           383:                struct  ifreq *ifcu_req;
        !           384:        } ifc_ifcu;
        !           385: #define        ifc_buf ifc_ifcu.ifcu_buf       /* buffer address */
        !           386: #define        ifc_req ifc_ifcu.ifcu_req       /* array of structures returned */
        !           387: };
        !           388: 
        !           389: #include <net/if_arp.h>
        !           390: 
        !           391: #ifdef _KERNEL
        !           392: #define        IFAFREE(ifa) \
        !           393:        if ((ifa)->ifa_refcnt <= 0) \
        !           394:                ifafree(ifa); \
        !           395:        else \
        !           396:                (ifa)->ifa_refcnt--;
        !           397: 
        !           398: extern struct  ifnet   *ifnet;
        !           399: 
        !           400: void   ether_ifattach __P((struct ifnet *));
        !           401: void   ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
        !           402: int    ether_output __P((struct ifnet *,
        !           403:           struct mbuf *, struct sockaddr *, struct rtentry *));
        !           404: char   *ether_sprintf __P((u_char *));
        !           405: 
        !           406: void   if_attach __P((struct ifnet *));
        !           407: void   if_down __P((struct ifnet *));
        !           408: void   if_qflush __P((struct ifqueue *));
        !           409: void   if_slowtimo __P((void *));
        !           410: void   if_up __P((struct ifnet *));
        !           411: int    ifconf __P((u_long, caddr_t));
        !           412: void   ifinit __P((void));
        !           413: int    ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
        !           414: int    ifpromisc __P((struct ifnet *, int));
        !           415: struct ifnet *ifunit __P((char *));
        !           416: 
        !           417: struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
        !           418: struct ifaddr *ifa_ifwithaf __P((int));
        !           419: struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
        !           420: struct ifaddr *ifa_ifwithnet __P((struct sockaddr *));
        !           421: struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
        !           422:                                        struct sockaddr *));
        !           423: struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
        !           424: void   ifafree __P((struct ifaddr *));
        !           425: void   link_rtrequest __P((int, struct rtentry *, struct sockaddr *));
        !           426: 
        !           427: int    loioctl __P((struct ifnet *, u_long, caddr_t));
        !           428: void   loopattach __P((int));
        !           429: int    looutput __P((struct ifnet *,
        !           430:           struct mbuf *, struct sockaddr *, struct rtentry *));
        !           431: void   lortrequest __P((int, struct rtentry *, struct sockaddr *));
        !           432: #endif /* _KERNEL */
        !           433: #endif /* _NET_IF_H */

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