ache.c

Linux 下的socket客户端服务端代码

/*------------------------------------------------------------------------------------
*
*  Copyright(c), 2002-....           
*    All rights reserved
*                       
*    FILENAME    : ache.c/cpp
*    CONTENTS    : implementation file for the acher 
*  DATE        : 2003/02/1
*  LANGUAGE    : C/C++
*  VERSION        : 1.0
*  AUTHOR      : Xiangbin Lee(Honeycombs)               
*  AUTHOR's EMail:
*        [e-mail]
*        [e-mail]
*-------------------------------------------------------------------------------------
* If this code works, it was written  by Xiangbin Lee(Honeycombs).
* If not, I don't know who wrote it.       
*-------------------------------------------------------------------------------------
* RECORD:
*  DATE              VERSION                AUTHOR                 CONTENTS
* 2003/02/01          1.0                Honeycombs                Create file
* 2003/03/15          1.1                Honeycombs                flee bugs
*------------------------------------------------------------------------------------*/

#include <string.h>
#include <stdlib.h>

#include "ache.h"

#ifndef EQ
#define EQ  == 
#endif
/***********************************************/

void SetBuf22(unsigned char *buf, unsigned short data)
{
    unsigned char *lpbuf;
    unsigned char *lpdata;
    lpbuf=buf;
    lpdata=(unsigned char *)(&data);     
    *lpbuf++=lpdata[0];
    *lpbuf++=lpdata[1];
}

unsigned short GetBuf22(unsigned char *buf)
{
    unsigned short data;
    unsigned char *lpbuf;
    unsigned char *lpdata;
    lpbuf=buf;
    lpdata=(unsigned char *)(&data);
    *lpdata++=lpbuf[0];
    *lpdata++=lpbuf[1];
    return data;
}

void SetBuf44(unsigned char *buf, unsigned long data)
{
    unsigned char *lpbuf;
    unsigned char *lpdata;
    lpbuf=buf;
    lpdata=(unsigned char *)(&data);
    *lpbuf++=lpdata[0];
    *lpbuf++=lpdata[1];
    *lpbuf++=lpdata[2];
    *lpbuf++=lpdata[3];
}

unsigned long GetBuf44(unsigned char *buf)
{
    unsigned long data ;
    unsigned char *lpbuf;
    unsigned char *lpdata;
    lpbuf=buf;
    lpdata=(unsigned char *)(&data);
    *lpdata++=lpbuf[0];
    *lpdata++=lpbuf[1];
    *lpdata++=lpbuf[2];
    *lpdata++=lpbuf[3];
    return data ;
}

void SetBuf43(unsigned char *buf, unsigned long data)
{
    unsigned char *lpbuf;
    unsigned char *lpdata;
    lpbuf=buf;
    lpdata=(unsigned char *)(&data);
    *lpbuf++=lpdata[1];
    *lpbuf++=lpdata[2];
    *lpbuf++=lpdata[3];
}


unsigned long GetBuf43(unsigned char *buf)
{
    unsigned long data;
    unsigned char *lpbuf;
    unsigned char *lpdata;
    
    lpbuf=buf;
    lpdata=(unsigned char *)(&data);
    *lpdata++=0;
    *lpdata++=lpbuf[0];
    *lpdata++=lpbuf[1];
    *lpdata++=lpbuf[2];
    return data ;
}

/* static password inche */
static unsigned short pppcrctab[256] = {
	    0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, 
        0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, 
        0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, 
        0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, 
        
        0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, 
        0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, 
        0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, 
        0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, 
        
        0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, 
        0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, 
        0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, 
        0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, 
        
        0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, 
        0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, 
        0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, 
        0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, 
        
        0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, 
        0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, 
        0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, 
        0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, 
        
        0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, 
        0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, 
        0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, 
        0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, 
        
        0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, 
        0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, 
        0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, 
        0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, 
        
        0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, 
        0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, 
        0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, 
        0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};


/*-------------------------------------------------------------
**  function name : TransPass
**  function describ: TransPass buffer acording the key randid
**  function interface :
param:
lpbuf  : char*, point to packet buffer
buflen:  int, the length of packet buffer
randid:  unsigned short, point to packet buffer
return:
NULL
-------------------------------------------------------------*/
void TransPass(unsigned char *lpbuf, int buflen, unsigned short randid)
{
    int freei;
    unsigned char *sbox=(unsigned char *)pppcrctab;
    for(freei=0;freei<buflen;freei++)
    {
        lpbuf[freei]^=(sbox[(randid+freei)%512]);
        
        if(freei%2)
            lpbuf[freei]^=(pppcrctab[randid%256]/256);
        else
            lpbuf[freei]^=(pppcrctab[randid%256]%256);
        
        randid=pppcrctab[randid%256];
    }
}


/*-------------------------------------------------------------
**  function name : TransPacket
**  function describ: Translate packet to frame
**  function interface :
param:
dest  : char*, point to object frame
source: char*, point to packet buffer
scrlen:  int , the length of packet buffer
return:
the length of frame, this length must LE 1280
-------------------------------------------------------------*/
int TransPacket(unsigned char *dest, unsigned char *source, int scrlen)
{
    int bytetype=2, len=scrlen, retlen=0, ifpass=0;
    unsigned short randid=0;
    unsigned char byte=0;
    unsigned char *lpdest = dest;
    
    randid=(rand()&0xFFFF);
    TransPass(source,scrlen,randid);
    
    while(len>0)
    {
        if(ifpass>1)
        {
            byte = *source++;
            len--;
        }
        else if(ifpass==0)
        {
            byte=(unsigned char)(randid/256);
            ifpass++;
        }
        else if(ifpass==1)
        {
            byte=(unsigned char)(randid%256);
            ifpass++;
        }
        
        if(byte<0x10)
        {
            if(bytetype EQ 2)
            {
                *lpdest++=0xF1;
                retlen++;
            }
            else if(bytetype EQ 3)
            {
                *lpdest++=0xF4;
                *lpdest++=0xF1;
                retlen+=2;
            }
            
            *lpdest++=(byte+0x10);
            bytetype=1;
        }
        else if(byte>=0xF0)
        {
            if(bytetype EQ 1)
            {
                *lpdest++=0xF2;
                *lpdest++=0xF3;
                retlen+=2;
            }
            else if(bytetype EQ 2)
            {
                *lpdest++=0xF3;
                retlen++;
            }
            
            *lpdest++=(byte-0x10);
            bytetype=3;
        }
        else
        {
            if(bytetype EQ 1)
            {
                *lpdest++=0xF2;
                retlen++;
            }
            else if(bytetype EQ 3)
            {
                *lpdest++=0xF4;
                retlen++;
            }
            
            *lpdest++=(byte);
            bytetype=2;
        }
        
        retlen++;
    };
    
    if(bytetype EQ 1)
    {
        *lpdest++=0xF2;
        retlen++;
    }
    else if(bytetype EQ 3)
    {
        *lpdest++=0xF4;
        retlen++;
    }
    
    (*lpdest++)=0;
    return retlen;
}


/*-------------------------------------------------------------
**  function name : ExTransPacket
**  function describ: ExTransPacket frame to packet
**  function interface :
param:
dest  : char*, point to object packet buffer
source: char*, point to source frame
scrlen:  int , the length of frame
return:
the length of packet buffer, this length must LE 571
-------------------------------------------------------------*/
int ExTransPacket(unsigned char *dest, unsigned char *source, int scrlen)
{
    int bytetype=2, len=scrlen, retlen=0, ifpass=0;
    unsigned short randid=0;
    unsigned char *lpdest = dest ;
    unsigned char byte=0;
    
    while(len>0)
    {
        byte = *source++;
        len--;
        
        if(byte EQ 0xF1)
            bytetype=1;
        else if(byte EQ 0xF3)
            bytetype=3;
        else if(byte EQ 0xF2||byte EQ 0xF4)
            bytetype=2;
        else
        {
            if(bytetype EQ 1)
                byte=(byte-0x10);
            else if(bytetype EQ 3)
                byte=(byte+0x10);
            
            if(ifpass>1)
            {
                (*lpdest++)=byte;
                retlen++;
            }
            else if(ifpass==0)
            {
                randid=byte*256;
                ifpass++;
            }
            else if(ifpass==1)
            {
                randid+=byte;
                ifpass++;
            }
        }
    };
    (*lpdest++)=0;
    
    TransPass(dest,retlen,randid);
    return retlen;
}


int AchbufToPktbuf(unsigned char *dest, unsigned char *frame, int framelen)
{
    int retlen=0;
    /*--------------- check frame length --------------*/
    if(framelen<4)
        return 0;
    /*-------  packet and frame must not be null  -----*/
    if(dest EQ NULL||frame EQ NULL)
        return 0 ;
    /*------------ check frame head and tail ----------*/
    if(frame[0]!=EXTRANS_FP_HEAD||frame[framelen-1]!=EXTRANS_FP_TAIL)
        return 0;
    /*------- Transmisstion frame into packet buffer --*/
    retlen= ExTransPacket(dest, frame+1, framelen-2);
    /*------- check packet buffer length --------------*/
    return retlen ;
}

int PktbufToAchbuf(unsigned char *dest, unsigned char *buf, int buflen)
{
    int retlen=0;
    /*-------  packet and frame must not be null  -----*/
    if(dest EQ NULL||buf EQ NULL)return 0 ;
    /*------- Transmisstion packet buffer into frame --*/
    *dest++=EXTRANS_FP_HEAD;
    retlen=TransPacket(dest, buf, buflen);
    dest+=retlen;
    *dest++=EXTRANS_FP_TAIL;
    retlen+=2;
    return retlen ;
}


int ResetAchStatus(
    ACHSTATUS *sta,
    unsigned char *dest,
    unsigned long maxbuflen,
    unsigned char fhead,
    unsigned char ftail,
    unsigned char fperbyte)
{
    if(sta EQ NULL||dest EQ NULL||maxbuflen<1024)
        return 0;
    sta->ACHCOUNT=0;
    sta->windex=0;
    sta->rindex=0;
    sta->ACHBuffer=(unsigned char *)dest;
    sta->MaxBufLen =maxbuflen;
    sta->head=fhead;
    sta->tail=ftail;
    sta->perbyte=fperbyte;
    sta->state=ACHE_USESIGNE;
    return 1;
}
/*
* Read Character from buffer
*/

int  ReaderAche( ACHSTATUS *achSta, unsigned char * buffer)
{
    int freei, ret=0, tailfound=-1, headfound=-1;
    int fcurrent,fcount;
    if(achSta EQ NULL||buffer EQ 0||achSta->ACHBuffer EQ NULL)
        return 0;
    if(achSta->state!=ACHE_USESIGNE)
        return 0;
    fcurrent=achSta->rindex;
    fcount = achSta->ACHCOUNT;
    if(fcount<2)
        return 0;
    for(freei=0;freei<fcount;freei++)
    {
        ret=freei+fcurrent;
        ret%=achSta->MaxBufLen;        
        if((achSta->ACHBuffer[ret]) EQ (achSta->head))
            headfound = freei;
        if((achSta->ACHBuffer[ret]) EQ (achSta->tail))
        {
            tailfound=freei;
            freei++;
            break;
        }
    }
    
    if(headfound<0&&tailfound<0)
        return 0;
    else if(headfound>=0&&tailfound<0)
        return 0;
    else if(headfound<0&&tailfound>=0)
    {
        achSta->ACHCOUNT -= (tailfound+1);
        achSta->rindex+=(tailfound+1);
        achSta->rindex%=achSta->MaxBufLen;
        return 0;
    }
    
    achSta->rindex+=headfound;
    achSta->rindex%=(achSta->MaxBufLen);
    
    if(achSta->readtype EQ ACHERW_NOTRANS)
    {
        for(ret=0;ret<tailfound-headfound+1;ret++)
        {
            buffer[ret]=(achSta->ACHBuffer[achSta->rindex])&(achSta->perbyte);
            achSta->ACHBuffer[achSta->rindex]=0;
            achSta->rindex++;
            achSta->rindex%=(achSta->MaxBufLen);
        }
        ret=tailfound-headfound+1;
        if(ret<0)ret=0;
    }
    else
    {
        achSta->readtype=ACHERW_TRANS;
        achSta->ACHBuffer[achSta->rindex]=0;
        achSta->rindex++;
        achSta->rindex%=(achSta->MaxBufLen);
        for(ret=0;ret<tailfound-headfound-1;ret++)
        {
            buffer[ret]=(achSta->ACHBuffer[achSta->rindex])&(achSta->perbyte);
            achSta->ACHBuffer[achSta->rindex]=0;
            achSta->rindex++;
            achSta->rindex%=(achSta->MaxBufLen);
        }
        achSta->ACHBuffer[achSta->rindex]=0;
        achSta->rindex++;
        achSta->rindex%=(achSta->MaxBufLen);
        ret=tailfound-headfound-1;
        if(ret<0)ret=0;
    }
    
    buffer[ret]=0;    
    
    if(ret>(int)achSta->ACHCOUNT)
        achSta->ACHCOUNT=0;
    else
        achSta->ACHCOUNT-=ret;
    
    return ret;
}

/*
* Write Character to buffer
*/

int  WriterAche( ACHSTATUS *achSta, unsigned char * buffer, int length)
{
    int i;
    if(achSta EQ NULL||buffer EQ 0||achSta->ACHBuffer EQ NULL)
        return 0;
    if(achSta->state!=ACHE_USESIGNE)
        return 0;
    
    switch(achSta->achemode)
    {
    case ACHE_AS_STACK:
        {
            if(achSta->writetype EQ ACHERW_TRANS)
            {
                achSta->rindex--;
                achSta->rindex%=(achSta->MaxBufLen);
                achSta->ACHBuffer[achSta->rindex]=(achSta->tail);
            }
            else
            {
                achSta->writetype=ACHERW_NOTRANS;
            }
            
            for ( i=length-1 ; i>=0 ; i--)
            {
                achSta->rindex--;
                achSta->rindex%=(achSta->MaxBufLen);
                achSta->ACHBuffer[achSta->rindex]=buffer[i]&(achSta->perbyte);
            }
            
            if(achSta->writetype EQ ACHERW_TRANS)
            {
                achSta->rindex--;
                achSta->rindex%=(achSta->MaxBufLen);
                achSta->ACHBuffer[achSta->rindex]=(achSta->head);
            }
            
            else
            {
                achSta->writetype=ACHERW_NOTRANS;
            }
            
        }break;
    default :
        {
            achSta->achemode=ACHE_AS_QUEUE;
            
            if(achSta->writetype EQ ACHERW_TRANS)
            {
                achSta->ACHBuffer[achSta->windex]=(achSta->head);
                achSta->windex++;
                achSta->windex%=(achSta->MaxBufLen);
            }
            else
            {
                achSta->writetype=ACHERW_NOTRANS;