FreeBSD/Linux Kernel Cross Reference
sys/netns/sp.h

     /*
      * Copyright (c) 1984, 1985, 1986, 1987, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)sp.h        8.1 (Berkeley) 6/10/93
     * $FreeBSD$
     */
    
    #ifndef _NETNS_SP_H_
    #define _NETNS_SP_H_
    
    /*
     * Definitions for Xerox NS style sequenced packet protocol
     */
    
    struct sphdr {
            u_char  sp_cc;          /* connection control */
            u_char  sp_dt;          /* datastream type */
    #define SP_SP   0x80            /* system packet */
    #define SP_SA   0x40            /* send acknowledgement */
    #define SP_OB   0x20            /* attention (out of band data) */
    #define SP_EM   0x10            /* end of message */
            u_short sp_sid;         /* source connection identifier */
            u_short sp_did;         /* destination connection identifier */
            u_short sp_seq;         /* sequence number */
            u_short sp_ack;         /* acknowledge number */
            u_short sp_alo;         /* allocation number */
    };
    
    #endif

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