FreeBSD/Linux Kernel Cross Reference
sys/netccitt/hdlc.h

     /*      $NetBSD: hdlc.h,v 1.8 2003/08/07 16:33:01 agc Exp $     */
     
     /*-
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This code is derived from software contributed to Berkeley by
      * the Laboratory for Computation Vision and the Computer Science Department
      * of the University of British Columbia.
     *
     * 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. 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.
     *
     *      @(#)hdlc.h      8.1 (Berkeley) 6/10/93
     */
    
    /*-
     * Copyright (c) 1984 University of British Columbia.
     *
     * This code is derived from software contributed to Berkeley by
     * the Laboratory for Computation Vision and the Computer Science Department
     * of the University of British Columbia.
     *
     * 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.
     *
     *      @(#)hdlc.h      8.1 (Berkeley) 6/10/93
     */
    
    #ifndef ORDER4
    #ifndef CCITT_TYPES_DEFINED
    #define CCITT_TYPES_DEFINED
    #define FALSE   0
    #define TRUE    1
    typedef u_char octet;
    typedef char    bool;
    #endif
    
    /*
     *  HDLC Packet format definitions
     *  This will eventually have to be rewritten without reference
     *  to bit fields, to be compliant with ANSI C and alignment safe.
     */
    
    #if BYTE_ORDER == BIG_ENDIAN
    #define ORDER4(a, b, c, d) a , b , c , d
    #define ORDER5(a, b, c, d, e) a , b , c , d , e
    #endif
    
    #if BYTE_ORDER == LITTLE_ENDIAN
    #define ORDER4(a, b, c, d) d , c , b , a
    #define ORDER5(a, b, c, d, e) e , d , c , b , a
    #endif
   #endif
   
   #define MAX_INFO_LEN    4096+3+4
   #define ADDRESS_A       3       /* B'00000011' */
   #define ADDRESS_B       1       /* B'00000001' */
   
   struct Hdlc_iframe {
           octet   address;
           octet   ORDER4(nr:3, pf:1, ns:3, hdlc_0:1);
           octet    i_field[MAX_INFO_LEN];
   };
   
   struct Hdlc_sframe {
           octet   address;
           octet   ORDER4(nr:3, pf:1, s2:2, hdlc_01:2);
   };
   
   struct  Hdlc_uframe {
           octet   address;
           octet   ORDER4(m3:3, pf:1, m2:2, hdlc_11:2);
   };
   
   struct  Frmr_frame {
           octet   address;
           octet   control;
           octet   frmr_control;
           octet   ORDER4(frmr_nr:3, frmr_f1_0:1, frmr_ns:3, frmr_f2_0:1);
           octet   ORDER5(frmr_0000:4, frmr_z:1, frmr_y:1, frmr_x:1, frmr_w:1);
   };
   
   #define HDHEADERLN      2
   #define MINFRLN         2               /* Minimum frame length. */
   
   struct  Hdlc_frame {
           octet   address;
           octet   control;
           octet   info[3];        /* min for FRMR */
   };
   
   #define SABM_CONTROL 057        /* B'00101111' */
   #define UA_CONTROL   0143       /* B'01100011' */
   #define DISC_CONTROL 0103       /* B'01000011' */
   #define DM_CONTROL   017        /* B'00001111' */
   #define FRMR_CONTROL 0207       /* B'10000111' */
   #define RR_CONTROL   01         /* B'00000001' */
   #define RNR_CONTROL  05         /* B'00000101' */
   #define REJ_CONTROL  011        /* B'00001001' */
   
   #define POLLOFF  0
   #define POLLON   1
   
   /* Define Link State constants. */
   
   #define INIT            0
   #define DM_SENT         1
   #define SABM_SENT       2
   #define ABM             3
   #define WAIT_SABM       4
   #define WAIT_UA         5
   #define DISC_SENT       6
   #define DISCONNECTED    7
   #define MAXSTATE        8
   
   /* The following constants are used in a switch statement to process
      frames read from the communications line. */
   
   #define SABM     0 * MAXSTATE
   #define DM       1 * MAXSTATE
   #define DISC     2 * MAXSTATE
   #define UA       3 * MAXSTATE
   #define FRMR     4 * MAXSTATE
   #define RR       5 * MAXSTATE
   #define RNR      6 * MAXSTATE
   #define REJ      7 * MAXSTATE
   #define IFRAME   8 * MAXSTATE
   #define ILLEGAL  9 * MAXSTATE
   
   #define T1      (3 * PR_SLOWHZ)         /*  IFRAME TIMEOUT - 3 seconds */
   #define T3      (T1 / 2)                /*  RR generate timeout - 1.5 seconds */
   #define N2      10
   #define MODULUS 8
   #define MAX_WINDOW_SIZE 7
   
   #define Z  0
   #define Y  1
   #define X  2
   #define W  3
   #define A  4
   
   #define TX 0
   #define RX 1

Cache object: 12789a1bd5144e6efdcd958b6f11b106