protocal.h

Linux 上的socket嗅探器

/*
 *
 * Copyright (C) 2003 Xiangbin Lee <[e-mail]> <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation.
 */

#ifndef _PROTOCAL_H_
#define _PROTOCAL_H_


#include "packet.h"

#define IOB(a)  ((a)>>3)
#define LOB(a)  ((a)-(((a)>>3)<<3))
#define BOB(a)  (IOB(a)+(LOB(a)!=0))
#define BLOI(a)  (a<<3)
// memory type for pdsdata 

#define PDSMEMTYPE_AUTO        0    // auto malloc
#define PDSMEMTYPE_STATIC    1    // static memory
#define PDSMEMTYPE_TRANS    2    // from parent

typedef struct _PDSDATA
{
    unsigned int nID; // protocal head id
    unsigned char memtype; // memory type
    unsigned long length;  // protocal length (bit longth)
    unsigned short nhbits; // no used length of bits
    unsigned short sibits; // signed length of bits
    unsigned char *lpbuf; // point to protocal data
    void *lparam;     // point to protocal param
}PDSDATA, *LPDSDATA;


typedef struct _PDS
{
    unsigned char reg;
    /* register sign */

    PDSDATA type;
    /* Hhead of data (const only)
    nID = protocal head ident code, must be set const
    memtype = memory type
    nhbits = no used data length of buffer
    sibits = child buffer position from parent
    length =is protocal head length, must be set const
    lpbuf = protocal head, must be set const
    lparam = type param for this type only, must be set const
    */


    PDSDATA p_data;
    /* main pase data
    nID = 0
    memtype = memory type
    nhbits = no used data length of lpbuf left
    sibits = comp protocal type position for child
    length = p_data data length, must be set from function Pdata return
    lpbuf = p_data data, must be set const
    lparam = point to system param, must be set const
    */

    CIRCLEACHESTATUS cldPDS;    // child mulitePDSs
    CIRCLEACHESTATUS parPDS;    // parent PDSs

    int (*PF_type)(PDSDATA *);
    /*
    PF_type: special function for this type, must be set const
    input: PDSDATA type
    output: depend on function
    return: 0 - success, others - error nummber
    */
    PDSDATA* (*PF_trans)(PDSDATA *);
    /*
    PF_trans: Pretranslated p_data, must be set const
    input: PDSDATA p_data
    return: point to PDSDATA translated, depend on function
    */

    int (*PF_data)(PDSDATA *);
    /*
    PF_type: main parse of this PSD
    input: PDSDATA p_data
    output: depend on function
    return: 0 - success, others - error nummber
    */

}PDS,*LPDS;



int ReadBits( // read bits from source
    unsigned char *dest, // point to dest buffer
    unsigned char *src, // point to dest buffer
    unsigned short bitsfrom, // start bits from head of source buffer
    unsigned int bitleng);   // read length (bit)

int CmpBits(
    unsigned char *buf1, unsigned short bf1, // point to dest buffer
    unsigned char *buf2, unsigned short bf2, // point to dest buffer
    unsigned int bitleng);// comp length (bit)

unsigned int GetPDSChildCount(PDS * lpPds);
PDS *GetCurChildPDS(PDS * lpPds);
void RewindPDSChild(PDS * lpPds);

unsigned int AddPDSChild(PDS * lpPds, PDS * lpCld);
unsigned int DelPDSChild(PDS * lpPds, PDS * lpCld);
void DelallPDSChild(PDS * lpPds);
void DisbandPDS(PDS * lpPds);

int PDSParse(PDS * lpPds);



#endif