The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net/if_tapvar.h

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    1 /*-
    2  * Copyright (C) 1999-2000 by Maksim Yevmenkin <m_evmenkin@yahoo.com>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * BASED ON:
   27  * -------------------------------------------------------------------------
   28  *
   29  * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
   30  * All rights reserved.
   31  *
   32  * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
   33  * Nottingham University 1987.
   34  */
   35 
   36 /*
   37  * $FreeBSD: releng/8.1/sys/net/if_tapvar.h 147256 2005-06-10 16:49:24Z brooks $
   38  * $Id: if_tapvar.h,v 0.6 2000/07/11 02:16:08 max Exp $
   39  */
   40 
   41 #ifndef _NET_IF_TAPVAR_H_
   42 #define _NET_IF_TAPVAR_H_
   43 
   44 /*
   45  * tap_mtx locks tap_flags, tap_pid.  tap_next locked with global tapmtx.
   46  * Other fields locked by owning subsystems.
   47  */
   48 struct tap_softc {
   49         struct ifnet    *tap_ifp;
   50         u_short         tap_flags;              /* misc flags                */
   51 #define TAP_OPEN        (1 << 0)
   52 #define TAP_INITED      (1 << 1)
   53 #define TAP_RWAIT       (1 << 2)
   54 #define TAP_ASYNC       (1 << 3)
   55 #define TAP_READY       (TAP_OPEN|TAP_INITED)
   56 #define TAP_VMNET       (1 << 4)
   57 
   58         u_int8_t        ether_addr[ETHER_ADDR_LEN]; /* ether addr of the remote side */
   59 
   60         pid_t            tap_pid;               /* PID of process to open    */
   61         struct sigio    *tap_sigio;             /* information for async I/O */
   62         struct selinfo   tap_rsel;              /* read select               */
   63 
   64         SLIST_ENTRY(tap_softc)  tap_next;       /* next device in chain      */
   65         struct cdev *tap_dev;
   66         struct mtx       tap_mtx;               /* per-softc mutex */
   67 };
   68 
   69 #endif /* !_NET_IF_TAPVAR_H_ */

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