494 lines
16 KiB
C
494 lines
16 KiB
C
/* @(#)39 1.16.2.12 src/bos/kernel/net/if.h, sockinc, bos411, 9428A410j 5/25/94 17:25:14 */
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/*
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* COMPONENT_NAME: SYSNET
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*
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* FUNCTIONS: IFMULTI_INITLOCK
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* IFMULTI_LOCK
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* IFMULTI_LOCK_RECURSIVE
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* IFMULTI_LOCKINIT
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* IFMULTI_UNLOCK_RECURSIVE
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* IFQ_LOCK
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* IFQ_LOCKINIT
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* IFQ_UNLOCK
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* IF_DEQUEUE
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* IF_DEQUEUE_NOLOCK
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* IF_DROP
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* IF_ENQUEUE
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* IF_ENQUEUE_NOLOCK
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* IF_PREPEND
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* IF_PREPEND_NOLOCK
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* IF_QFULL
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*
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*
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* ORIGINS: 26,27,85
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*
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*
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* (C) COPYRIGHT International Business Machines Corp. 1988,1993
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* All Rights Reserved
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* Licensed Materials - Property of IBM
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* US Government Users Restricted Rights - Use, duplication or
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* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
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*/
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#ifndef _NET_IF_H
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#define _NET_IF_H
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/*
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*
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* (c) Copyright 1991, OPEN SOFTWARE FOUNDATION, INC.
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* ALL RIGHTS RESERVED
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*
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*/
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/*
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* OSF/1 1.2
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*/
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/*
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* Copyright (C) 1988,1989 Encore Computer Corporation. All Rights Reserved
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*
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* Property of Encore Computer Corporation.
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* This software is made available solely pursuant to the terms of
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* a software license agreement which governs its use. Unauthorized
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* duplication, distribution or sale are strictly prohibited.
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*
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*/
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/*
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* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted provided
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* that: (1) source distributions retain this entire copyright notice and
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* comment, and (2) distributions including binaries display the following
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* acknowledgement: ``This product includes software developed by the
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* University of California, Berkeley and its contributors'' in the
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* documentation or other materials provided with the distribution and in
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* all advertising materials mentioning features or use of this software.
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* Neither the name of the University nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Base: if.h 7.6 (Berkeley) 9/20/89
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* Merged: if.h 7.9 (Berkeley) 6/28/90
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*/
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/*
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* Structures defining a network interface, providing a packet
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* transport mechanism (ala level 0 of the PUP protocols).
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*
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* Each interface accepts output datagrams of a specified maximum
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* length, and provides higher level routines with input datagrams
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* received from its medium.
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*
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* Output occurs when the routine if_output is called, with four parameters:
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* (*ifp->if_output)(ifp, m, dst, ro)
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* Here m is the mbuf chain to be sent and dst is the destination address.
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* The output routine encapsulates the supplied datagram if necessary,
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* and then transmits it on its medium.
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*
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* On input, each interface unwraps the data received by it, and either
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* places it on the input queue of a internetwork datagram routine
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* and posts the associated software interrupt, or passes the datagram to a raw
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* packet input routine.
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*
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* Routines exist for locating interfaces by their addresses
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* or for locating a interface on a certain network, as well as more general
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* routing and gateway routines maintaining information used to locate
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* interfaces. These routines live in the files if.c and route.c
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*/
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#if defined(_KERNEL) && !defined(_NET_GLOBALS_H_)
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#include "net/net_globals.h"
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#endif
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#ifndef _TIME_
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#ifdef _KERNEL
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#include "sys/time.h"
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#else
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#include <sys/time.h>
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#endif
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#endif
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/*
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* Structure defining a queue for a network interface.
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*/
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struct ifnet {
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char *if_name; /* name, e.g. ``en'' or ``lo'' */
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short if_unit; /* sub-unit for lower level driver */
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u_long if_mtu; /* maximum transmission unit */
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u_long if_flags; /* up/down, broadcast, etc. */
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short if_timer; /* time 'til if_watchdog called */
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int if_metric; /* routing metric (external only) */
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struct ifaddr *if_addrlist; /* linked list of addresses per if */
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/* procedure handles */
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#ifdef _KERNEL
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int (*if_init)(int);
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int (*if_output)(struct ifnet *, struct mbuf *,
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struct sockaddr *, struct rtentry *);
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int (*if_start)(struct ifnet *);
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int (*if_done)(struct ifnet *);
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int (*if_ioctl)(struct ifnet *, int, caddr_t);
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int (*if_reset)(int, int);
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int (*if_watchdog)(int);
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#else
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int (*if_init)(); /* init routine */
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int (*if_output)(); /* output routine (enqueue) */
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int (*if_start)(); /* initiate output routine */
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int (*if_done)(); /* output complete routine */
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int (*if_ioctl)(); /* ioctl routine */
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int (*if_reset)(); /* bus reset routine */
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int (*if_watchdog)(); /* timer routine */
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#endif
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/* generic interface statistics */
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int if_ipackets; /* packets received on interface */
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int if_ierrors; /* input errors on interface */
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int if_opackets; /* packets sent on interface */
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int if_oerrors; /* output errors on interface */
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int if_collisions; /* collisions on csma interfaces */
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/* end statistics */
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struct ifnet *if_next;
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u_char if_type; /* ethernet, tokenring, etc */
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u_char if_addrlen; /* media address length */
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u_char if_hdrlen; /* media header length */
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u_char if_index; /* numeric abbreviation for this if */
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/* SNMP statistics */
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struct timeval if_lastchange; /* last updated */
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int if_ibytes; /* total number of octets received */
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int if_obytes; /* total number of octets sent */
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int if_imcasts; /* packets received via multicast */
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int if_omcasts; /* packets sent via multicast */
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int if_iqdrops; /* dropped on input, this interface */
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int if_noproto; /* destined for unsupported protocol */
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int if_baudrate; /* linespeed */
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/* netstat -D statistics */
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u_long if_arpdrops; /* dropped because no arp response */
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int if_reserved[8]; /* reserved for future use */
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/* stuff for device driver */
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dev_t devno; /* device number */
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chan_t chan; /* channel of mpx device */
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#ifdef IP_MULTICAST
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struct in_multi *if_multiaddrs; /* list of multicast addresses */
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#endif
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int (*if_tap)(); /* packet tap */
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caddr_t if_tapctl; /* link for tap (ie BPF) */
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int (*if_arpres)(); /* arp resolver routine */
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int (*if_arprev)(); /* Reverse-ARP input routine */
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int (*if_arpinput)(); /* arp input routine */
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struct ifqueue {
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struct mbuf *ifq_head;
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struct mbuf *ifq_tail;
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int ifq_len;
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int ifq_maxlen;
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int ifq_drops;
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#ifndef _KERNEL
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#define simple_lock_data_t int
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#define lock_data_t struct { int a; int b; }
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#endif
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#ifdef NETSYNC_LOCK
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simple_lock_data_t ifq_slock;
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#endif
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} if_snd; /* output queue */
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#ifdef LOCK_NETSTATS
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simple_lock_data_t if_slock; /* statistics lock */
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#endif
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#ifdef IP_MULTICAST
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simple_lock_data_t if_multi_lock;
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#endif
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};
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#ifdef IP_MULTICAST
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#if NETSYNC_LOCK
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#define IFMULTI_LOCK_DECL() int _ifml;
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#define IFMULTI_LOCK(ifp) _ifml = disable_lock(PL_IMP, &(ifp)->if_multi_lock)
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#define IFMULTI_UNLOCK(ifp) unlock_enable(_ifml, &(ifp)->if_multi_lock)
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#define IFMULTI_INITLOCK(ifp) { \
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lock_alloc(&(ifp)->if_multi_lock, LOCK_ALLOC_PIN, \
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IFMULTI_LOCK_FAMILY, ifp); \
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simple_lock_init(&(ifp)->if_multi_lock); \
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}
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#define IFMULTI_LOCK_RECURSIVE(ifp) IFMULTI_LOCK(ifp)
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#define IFMULTI_UNLOCK_RECURSIVE(ifp) IFMULTI_UNLOCK(ifp)
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#else
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#define IFMULTI_LOCK(ifp)
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#define IFMULTI_UNLOCK(ifp)
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#define IFMULTI_LOCKINIT(ifp)
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#define IFMULTI_LOCK_RECURSIVE(ifp) NETSPL(s, net)
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#define IFMULTI_UNLOCK_RECURSIVE(ifp) NETSPLX(s)
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#endif
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#endif
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#ifndef IFF_UP
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#define IFF_UP 0x1 /* interface is up */
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#endif
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#define IFF_BROADCAST 0x2 /* broadcast address valid */
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#define IFF_DEBUG 0x4 /* turn on debugging */
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#define IFF_LOOPBACK 0x8 /* is a loopback net */
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#define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */
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#define IFF_NOTRAILERS 0x20 /* avoid use of trailers */
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#ifndef IFF_RUNNING
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#define IFF_RUNNING 0x40 /* resources allocated */
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#endif
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#define IFF_NOARP 0x80 /* no address resolution protocol */
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#define IFF_PROMISC 0x100 /* receive all packets */
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#define IFF_ALLMULTI 0x200 /* receive all multicast packets */
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#define IFF_OACTIVE 0x400 /* transmission in progress */
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#define IFF_SIMPLEX 0x800 /* can't hear own transmissions */
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#ifdef _AIX
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#define IFF_DO_HW_LOOPBACK 0x10000 /* force loopback thru hardware */
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#define IFF_ALLCAST 0x20000 /* global broadcast */
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#define IFF_BRIDGE 0x40000 /* receive all bridge packets */
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#define IFF_NOECHO IFF_SIMPLEX /* receives echo packets */
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#endif
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#define IFF_BPF 0x8000000 /* bpf is supported for this IF */
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/* Device-specific flags */
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#define IFF_D1 0x8000
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#define IFF_D2 0x4000
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#define IFF_D3 0x2000
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#define IFF_D4 0x1000
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#define IFF_SNAP IFF_D1 /* Ethernet driver outputs SNAP hdr */
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#ifdef IP_MULTICAST
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#define IFF_MULTICAST 0x80000 /* supports multicast */
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/*
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* The IFF_MULTICAST flag indicates that the network can support the
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* transmission and reception of higher-level (e.g., IP) multicast packets.
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* It is independent of hardware support for multicasting; for example,
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* point-to-point links or pure broadcast networks may well support
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* higher-level multicasts.
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*/
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#define IFF_CANTCHANGE \
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(IFF_BROADCAST|IFF_POINTOPOINT|IFF_SIMPLEX|IFF_RUNNING|IFF_OACTIVE|IFF_MULTICAST)
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#else
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/* flags set internally only: */
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#define IFF_CANTCHANGE \
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(IFF_BROADCAST|IFF_POINTOPOINT|IFF_SIMPLEX|IFF_RUNNING|IFF_OACTIVE)
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#endif
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/*
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* Multiprocessor queue locking.
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*
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* Note that the IF_QFULL and IF_DROP macros become racy in an mp environment.
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* The exact number of ifq_drops probably isn't important; on the other hand,
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* it is possible that an unlocked ifq could grow larger than its declared
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* ifq_maxlen as processors race between IF_QFULL and IF_ENQUEUE. However,
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* it is still ABSOLUTELY NECESSARY that modification of ifq_len be locked!
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*
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*/
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#define IFQ_LOCK_DECL() int _qs;
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#define IFQ_LOCKINIT(ifq) { \
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lock_alloc(&((ifq)->ifq_slock), LOCK_ALLOC_PIN, IFQ_LOCK_FAMILY, ifq);\
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simple_lock_init(&((ifq)->ifq_slock)); \
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}
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#define IFQ_LOCK(ifq) _qs = disable_lock(PL_IMP ,&((ifq)->ifq_slock))
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#define IFQ_UNLOCK(ifq) unlock_enable(_qs, &((ifq)->ifq_slock))
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/*
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* Output queues (ifp->if_snd) and internetwork datagram level (pup level 1)
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* input routines have queues of messages stored on ifqueue structures
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* (defined above). Entries are added to and deleted from these structures
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* by these macros, which should be called with ipl raised to splimp().
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*/
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#define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
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#define IF_DROP(ifq) ((ifq)->ifq_drops++)
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#define IF_ENQUEUE_NOLOCK(ifq, m) { \
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(m)->m_nextpkt = 0; \
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if ((ifq)->ifq_tail == 0) \
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(ifq)->ifq_head = m; \
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else \
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(ifq)->ifq_tail->m_nextpkt = m; \
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(ifq)->ifq_tail = m; \
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(ifq)->ifq_len++; \
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}
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#define IF_ENQUEUE(ifq, m) { \
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IFQ_LOCK(ifq); \
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IF_ENQUEUE_NOLOCK(ifq, m); \
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IFQ_UNLOCK(ifq); \
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}
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#define IF_PREPEND_NOLOCK(ifq, m) { \
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(m)->m_nextpkt = (ifq)->ifq_head; \
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if ((ifq)->ifq_tail == 0) \
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(ifq)->ifq_tail = (m); \
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(ifq)->ifq_head = (m); \
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(ifq)->ifq_len++; \
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}
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#define IF_PREPEND(ifq, m) { \
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IFQ_LOCK(ifq); \
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IF_PREPEND_NOLOCK(ifq, m); \
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IFQ_UNLOCK(ifq); \
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}
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#define IF_DEQUEUE_NOLOCK(ifq, m) { \
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(m) = (ifq)->ifq_head; \
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if (m) { \
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if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \
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(ifq)->ifq_tail = 0; \
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(m)->m_nextpkt = 0; \
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(ifq)->ifq_len--; \
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} \
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}
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#define IF_DEQUEUE(ifq, m) { \
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IFQ_LOCK(ifq); \
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IF_DEQUEUE_NOLOCK(ifq, m); \
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IFQ_UNLOCK(ifq); \
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}
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#define IFQ_MAXLEN 50
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#define IFNET_SLOWHZ 1 /* granularity is 1 second */
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/*
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* The ifaddr structure contains information about one address
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* of an interface. They are maintained by the different address families,
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* are allocated and attached when an address is set, and are linked
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* together so all addresses for an interface can be located.
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*/
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struct ifaddr {
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struct sockaddr *ifa_addr; /* address of interface */
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struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */
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#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */
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struct sockaddr *ifa_netmask; /* used to determine subnet */
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struct ifnet *ifa_ifp; /* back-pointer to interface */
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struct ifaddr *ifa_next; /* next address for interface */
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#ifdef _KERNEL
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void (*ifa_rtrequest)(int, struct rtentry *, struct sockaddr *);
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#else
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void (*ifa_rtrequest)(); /* check or clean routes (+ or -)'d */
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#endif
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struct rtentry *ifa_rt; /* ??? for ROUTETOIF */
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u_short ifa_flags; /* mostly rt_flags for cloning */
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short ifa_refcnt; /* extra to malloc for link info */
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};
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#define IFA_ROUTE RTF_UP /* route installed */
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/*
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* Interface request structure used for socket
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* ioctl's. All interface ioctl's must have parameter
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* definitions which begin with ifr_name. The
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* remainder may be interface specific.
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*/
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struct ifreq {
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#define IFNAMSIZ 16
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char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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union {
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struct sockaddr ifru_addr;
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struct sockaddr ifru_dstaddr;
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struct sockaddr ifru_broadaddr;
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u_long ifru_flags;
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int ifru_metric;
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caddr_t ifru_data;
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#ifdef _AIX
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u_long ifru_mtu;
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#endif
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} ifr_ifru;
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#define ifr_addr ifr_ifru.ifru_addr /* address */
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#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-to-p link */
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#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address */
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#define ifr_flags ifr_ifru.ifru_flags /* flags */
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#define ifr_metric ifr_ifru.ifru_metric /* metric */
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#define ifr_data ifr_ifru.ifru_data /* for use by interface */
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#ifdef _AIX
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#define ifr_mtu ifr_ifru.ifru_mtu /* mtu of interface */
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#endif
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};
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struct ifaliasreq {
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char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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struct sockaddr ifra_addr;
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struct sockaddr ifra_broadaddr;
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struct sockaddr ifra_mask;
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};
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#ifdef _AIX /* for AIX 3.1 binary compatibility */
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struct oifreq {
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char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
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union {
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struct sockaddr ifru_addr;
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struct sockaddr ifru_dstaddr;
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struct sockaddr ifru_broadaddr;
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long ifru_flags;
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int ifru_metric;
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caddr_t ifru_data;
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u_long ifru_mtu;
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} ifr_ifru;
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u_char reserved[8];
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};
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#endif
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/*
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* Structure used in SIOCGIFCONF request.
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* Used to retrieve interface configuration
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* for machine (useful for programs which
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* must know all networks accessible).
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*/
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struct ifconf {
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int ifc_len; /* size of associated buffer */
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union {
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caddr_t ifcu_buf;
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struct ifreq *ifcu_req;
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} ifc_ifcu;
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#define ifc_buf ifc_ifcu.ifcu_buf /* buffer address */
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#define ifc_req ifc_ifcu.ifcu_req /* array of structures returned */
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};
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#ifdef _KERNEL
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#include "net/if_arp.h"
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extern struct ifnet *ifnet, loif;
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#ifdef NETSYNC_LOCK
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extern simple_lock_data_t ifa_refcnt_lock;
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#define IFAREFCNT_LOCK_DECL() int _ifa_refcnt;
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#define IFAREFCNT_LOCK() _ifa_refcnt = disable_lock(PL_IMP, &ifa_refcnt_lock);
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#define IFAREFCNT_UNLOCK() unlock_enable(_ifa_refcnt, &ifa_refcnt_lock);
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#else
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#define IFAREFCNT_LOCK_DECL()
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#define IFAREFCNT_LOCK()
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#define IFAREFCNT_UNLOCK()
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#endif
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extern void ifafree(struct ifaddr *);
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#define IFAFREE(ifa) \
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if ((ifa)->ifa_refcnt <= 0) \
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ifafree(ifa); \
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else \
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(ifa)->ifa_refcnt--;
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#else
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#include <net/if_arp.h>
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#endif
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#ifdef _AIX
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/*
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* These defines should not be used. They are here for compatibility with
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* previous releases. Please use types defined in <net/if_types.h>.
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*/
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#ifndef _NET_IF_TYPES_H
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#include "net/if_types.h"
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#endif
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#define UCAST_TYPE 1
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#define NUCAST_TYPE 2
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#define OTHER_TYPE IFT_OTHER /* other network type */
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#define REGULAR1822 IFT_1822
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#define HDH1822 IFT_HDH1822
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#define DDN_X25 IFT_X25DDN
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#define RFC877_X25 IFT_X25
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#define ETHERNET_CSMACD IFT_ETHER
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#define ISO88023_CSMACD IFT_ISO88023
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#define ISO88024_TOKBUS IFT_ISO88024
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#define ISO88025_TOKRNG IFT_ISO88025
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#define ISO88026_MAN IFT_ISO88026
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#define STARLAN IFT_STARLAN
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#define PROTEON_10MBIT IFT_P10
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#define PROTEON_80MBIT IFT_P80
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#define HYPERCHANNEL IFT_HY
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#define FDDI IFT_FDDI
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#define LAPB IFT_LAPB
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#define SDLC IFT_SDLC
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#define T1_CARRIER IFT_T1
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#define CEPT IFT_CEPT /* European equivalent of T-1 */
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#define BASICISDN IFT_ISDNBASIC
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#define PRIMARYISDN IFT_ISDNPRIMARY
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#define PROPPTPSERIAL IFT_PTPSERIAL /* Proprietary Serail */
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#endif /* _AIX */
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#endif /* _NET_IF_H */
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