ppp-comp.h revision a0b85df49408b3ff0ca3c0780974f13a7b485ae3
/*
* ppp-comp.h - Definitions for doing PPP packet compression.
*
* Copyright 2000 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 1994 The Australian National University.
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, provided that the above copyright
* notice appears in all copies. This software is provided without any
* warranty, express or implied. The Australian National University
* makes no representations about the suitability of this software for
* any purpose.
*
* IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
* THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
* OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
* OR MODIFICATIONS.
*
* $Id: ppp-comp.h,v 1.11 1998/03/25 03:33:34 paulus Exp $
*/
#ifndef _NET_PPP_COMP_H
#define _NET_PPP_COMP_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* The following symbols control whether we include code for
* various compression methods.
*/
#ifndef DO_BSD_COMPRESS
#endif
#ifndef DO_DEFLATE
#endif
#define DO_PREDICTOR_1 0
#define DO_PREDICTOR_2 0
/*
* Structure giving methods for compression/decompression.
*/
#ifdef PACKETPTR
struct compressor {
int compress_proto; /* CCP compression protocol number */
/* Allocate space for a compressor (transmit side) */
/* Free space used by a compressor */
/* Initialize a compressor */
/* Reset a compressor */
/* Compress a packet */
/* Return compression statistics */
/* Allocate space for a decompressor (receive side) */
/* Free space used by a decompressor */
/* Initialize a decompressor */
/* Reset a decompressor */
/* Decompress a packet. */
/* Update state for an incompressible packet received */
/* Return decompression statistics */
/* Set or change compression effort level */
int effortlevel));
};
#endif /* PACKETPTR */
/*
* Return values for decompress routine.
* We need to make these distinctions so that we can disable certain
* useful functionality, namely sending a CCP reset-request as a result
* of an error detected after decompression. This is to avoid infringing
* a patent held by Motorola.
* Don't you just lurve software patents.
*/
#define DECOMP_OK 0 /* everything went OK */
/*
* CCP codes.
*/
#define CCP_CONFREQ 1
#define CCP_CONFACK 2
#define CCP_TERMREQ 5
#define CCP_TERMACK 6
#define CCP_RESETREQ 14
#define CCP_RESETACK 15
/*
* Max # bytes for a CCP option
*/
#define CCP_MAX_OPTION_LENGTH 32
/*
* Parts of a CCP packet.
*/
#define CCP_HDRLEN 4
#define CCP_OPT_MINLEN 2
/*
* Definitions for BSD-Compress.
*/
/* Macros for handling the 3rd byte of the BSD-Compress config option. */
#define BSD_MAKE_OPT(v, n) (((v) << 5) | (n))
/*
* Definitions for Deflate.
*/
#define DEFLATE_MIN_SIZE 8
#define DEFLATE_MAX_SIZE 15
#define DEFLATE_METHOD_VAL 8
#define DEFLATE_METHOD(x) ((x) & 0x0F)
#define DEFLATE_CHK_SEQUENCE 0
/*
* Definitions for other, as yet unsupported, compression methods.
*/
/*
* Note that some systems emit requests for STAC using a length of 6.
* The extra octet is 00 and should be ignored.
*/
#define STAC_CHK_NONE 0 /* No checking */
#define MPPC_MPPE 0x000000F0
#ifdef __cplusplus
}
#endif
#endif /* _NET_PPP_COMP_H */