pppdefs.h

用于TM1300/PNX1300系列DSP（主要用于视频处理）的操作系统pSOS。包括全部源码

/************************************************************************/
/*                                                                      */
/*   MODULE:  pppdefs.h                                                 */
/*   PRODUCT: pNA+,  OpEN TCP/IP PPP driver                             */
/*   PURPOSE: PPPDEFS module                                            */
/*   DATE:    28 February, 1996                                         */
/*                                                                      */
/*----------------------------------------------------------------------*/
/*                                                                      */
/*              Copyright 1996, Integrated Systems, Inc.                */
/*                      ALL RIGHTS RESERVED                             */
/*                                                                      */
/*   Permission is hereby granted to licensees of Integrated Systems,   */
/*   Inc. products to use or abstract this computer program for the     */
/*   sole purpose of implementing a product based on Integrated         */
/*   Systems, Inc. products.   No other rights to reproduce, use,       */
/*   or disseminate this computer program, whether in part or in        */
/*   whole, are granted.                                                */
/*                                                                      */
/*   Integrated Systems, Inc. makes no representation or warranties     */
/*   with respect to the performance of this computer program, and      */
/*   specifically disclaims any responsibility for any damages,         */
/*   special or consequential, connected with the use of this program.  */
/*                                                                      */
/************************************************************************/
#ifndef _PPPDEFS_H_
#define _PPPDEFS_H_

/*
 * The basic PPP frame.
 */
#define PPP_HDRLEN	4	/* octets for standard ppp header */
#define PPP_FCSLEN	2	/* octets for FCS */
#define PPP_MRU		1500	/* default MRU = max length of info field */

#define PPP_ADDRESS(p)	(((u_char *)(p))[0])
#define PPP_CONTROL(p)	(((u_char *)(p))[1])
#define PPP_PROTOCOL(p)	((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])

/*
 * Significant octet values.
 */
#define	PPP_ALLSTATIONS	0xff	/* All-Stations broadcast address */
#define	PPP_UI		0x03	/* Unnumbered Information */
#define	PPP_FLAG	0x7e	/* Flag Sequence */
#define	PPP_ESCAPE	0x7d	/* Asynchronous Control Escape */
#define	PPP_TRANS	0x20	/* Asynchronous transparency modifier */

/*
 * Protocol field values.
 */
#define PPP_IP		0x21	/* Internet Protocol */
#define	PPP_VJC_COMP	0x2d	/* VJ compressed TCP */
#define	PPP_VJC_UNCOMP	0x2f	/* VJ uncompressed TCP */
#define PPP_COMP	0xfd	/* compressed packet */
#define PPP_IPCP	0x8021	/* IP Control Protocol */
#define PPP_CCP		0x80fd	/* Compression Control Protocol */
#define PPP_LCP		0xc021	/* Link Control Protocol */
#define PPP_PAP		0xc023	/* Password Authentication Protocol */
#define PPP_LQR		0xc025	/* Link Quality Report protocol */
#define PPP_CHAP	0xc223	/* Cryptographic Handshake Auth. Protocol */

/*
 * Values for FCS calculations.
 */
#define PPP_INITFCS	0xffff	/* Initial FCS value */
#define PPP_GOODFCS	0xf0b8	/* Good final FCS value */
#define PPP_FCS(fcs, c)	(((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])


/*
 * Extended asyncmap - allows any character to be escaped.
 */
typedef u_int32_t	ext_accm[8];

/*
 * What to do with network protocol (NP) packets.
 */
enum NPmode {
    NPMODE_PASS,		/* pass the packet through */
    NPMODE_DROP,		/* silently drop the packet */
    NPMODE_ERROR,		/* return an error */
    NPMODE_QUEUE		/* save it up for later. */
};

/*
 * Standard PPP header.
 */
struct ppp_header {
    u_char  ph_address;     /* Address Field */
    u_char  ph_control;     /* Control Field */
    u_short ph_protocol;    /* Protocol Field */
};

/*
 * Statistics.
 */
struct pppstat	{
    u_int	ppp_ibytes;	/* bytes received */
    u_int	ppp_ipackets;	/* packets received */
    u_int	ppp_ierrors;	/* receive errors */
    u_int	ppp_obytes;	/* bytes sent */
    u_int	ppp_opackets;	/* packets sent */
    u_int	ppp_oerrors;	/* transmit errors */
};

struct vjstat {
    u_int	vjs_packets;	/* outbound packets */
    u_int	vjs_compressed;	/* outbound compressed packets */
    u_int	vjs_searches;	/* searches for connection state */
    u_int	vjs_misses;	/* times couldn't find conn. state */
    u_int	vjs_uncompressedin; /* inbound uncompressed packets */
    u_int	vjs_compressedin;   /* inbound compressed packets */
    u_int	vjs_errorin;	/* inbound unknown type packets */
    u_int	vjs_tossed;	/* inbound packets tossed because of error */
};

struct ppp_stats {
    struct pppstat	p;	/* basic PPP statistics */
    struct vjstat	vj;	/* VJ header compression statistics */
};

struct compstat {
    u_int	unc_bytes;	/* total uncompressed bytes */
    u_int	unc_packets;	/* total uncompressed packets */
    u_int	comp_bytes;	/* compressed bytes */
    u_int	comp_packets;	/* compressed packets */
    u_int	inc_bytes;	/* incompressible bytes */
    u_int	inc_packets;	/* incompressible packets */
    u_int	ratio;		/* recent compression ratio << 8 */
};

struct ppp_comp_stats {
    struct compstat	c;	/* packet compression statistics */
    struct compstat	d;	/* packet decompression statistics */
};

#endif /* _PPPDEFS_H_ */