Linux下DES安全通信编程
des.h
/*********************************************************************/
/*-文件名：des.h
/*-功能： 实现DES加密算法的加密解密功能 for linux
/*********************************************************************/
#define SUCCESS 1;
typedef int INT32;
typedef char INT8;
typedef unsigned char ULONG8;
typedef unsigned short ULONG16;
typedef unsigned long ULONG32;
static const ULONG8 DESENCRY=11;
static const ULONG8 DESDECRY=22;
static const ULONG8 pc_first[64] = {/*初始置换IP*/
58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,
62,54,46,38,30,22,14,6,64,56,48,40,32,24,16,8,
57,49,41,33,25,17,9,1,59,51,43,35,27,19,11,3,
61,53,45,37,29,21,13,5,63,55,47,39,31,23,15,7 } ;
static const ULONG8 pc_last[64] = { /*逆初始置换IP-1*/
40,8,48,16,56,24,64,32, 39,7,47,15,55,23,63,31,
38,6,46,14,54,22,62,30, 37,5,45,13,53,21,61,29,
36,4,44,12,52,20,60,28, 35,3,43,11,51,19,59,27,
34,2,42,10,50,18,58,26, 33,1,41,9,49,17,57,25};
static const ULONG32 pc_by_bit[64] = { /*按位取值或赋值*/
0x80000000L,0x40000000L,0x20000000L,0x10000000L, 0x8000000L,
0x4000000L, 0x2000000L, 0x1000000L, 0x800000L, 0x400000L,
0x200000L, 0x100000L, 0x80000L, 0x40000L, 0x20000L,0x10000L,
0x8000L, 0x4000L, 0x2000L, 0x1000L, 0x800L, 0x400L, 0x200L,
0x100L, 0x80L,0x40L,0x20L, 0x10L, 0x8L, 0x4L, 0x2L, 0x1L,
0x80000000L,0x40000000L,0x20000000L,0x10000000L, 0x8000000L,
0x4000000L, 0x2000000L, 0x1000000L, 0x800000L, 0x400000L,
0x200000L, 0x100000L, 0x80000L, 0x40000L, 0x20000L, 0x10000L,
0x8000L, 0x4000L, 0x2000L, 0x1000L, 0x800L, 0x400L, 0x200L,
0x100L, 0x80L, 0x40L,0x20L, 0x10L, 0x8L, 0x4L, 0x2L, 0x1L, };
static const ULONG8 des_P[32] = {/*置换运算P*/
16,7,20,21, 29,12,28,17, 1,15,23,26,
5,18,31,10, 2,8,24,14, 32,27,3,9,
19,13,30,6, 22,11,4,25};
static const ULONG8 des_E[48] = {/*数据扩展*/
32,1,2,3,4,5,4,5,6,7,8,9,8,9,10,11,12,13,
12,13,14,15,16,17,16,17,18,19,20,21,
20,21,22,23,24,25,24,25,26,27,28,29,
28,29,30,31,32,1 };
static const ULONG8 des_S[8][64] = {/*数据压缩*/
{
0xe,0x0,0x4,0xf,0xd,0x7,0x1,0x4,0x2,0xe,0xf,0x2,0xb,
0xd,0x8,0x1,0x3,0xa,0xa,0x6,0x6,0xc,0xc,0xb,0x5,0x9,
0x9,0x5,0x0,0x3,0x7,0x8,0x4,0xf,0x1,0xc,0xe,0x8,0x8,
0x2,0xd,0x4,0x6,0x9,0x2,0x1,0xb,0x7,0xf,0x5,0xc,0xb,
0x9,0x3,0x7,0xe,0x3,0xa,0xa,0x0,0x5,0x6,0x0,0xd
},
{
0xf,0x3,0x1,0xd,0x8,0x4,0xe,0x7,0x6,0xf,0xb,0x2,0x3,
0x8,0x4,0xf,0x9,0xc,0x7,0x0,0x2,0x1,0xd,0xa,0xc,0x6,
0x0,0x9,0x5,0xb,0xa,0x5,0x0,0xd,0xe,0x8,0x7,0xa,0xb,
0x1,0xa,0x3,0x4,0xf,0xd,0x4,0x1,0x2,0x5,0xb,0x8,0x6,
0xc,0x7,0x6,0xc,0x9,0x0,0x3,0x5,0x2,0xe,0xf,0x9
},
{
0xa,0xd,0x0,0x7,0x9,0x0,0xe,0x9,0x6,0x3,0x3,0x4,0xf,
0x6,0x5,0xa,0x1,0x2,0xd,0x8,0xc,0x5,0x7,0xe,0xb,0xc,
0x4,0xb,0x2,0xf,0x8,0x1,0xd,0x1,0x6,0xa,0x4,0xd,0x9,
0x0,0x8,0x6,0xf,0x9,0x3,0x8,0x0,0x7,0xb,0x4,0x1,0xf,
0x2,0xe,0xc,0x3,0x5,0xb,0xa,0x5,0xe,0x2,0x7,0xc
},
{
0x7,0xd,0xd,0x8,0xe,0xb,0x3,0x5,0x0,0x6,0x6,0xf,0x9,
0x0,0xa,0x3,0x1,0x4,0x2,0x7,0x8,0x2,0x5,0xc,0xb,0x1,
0xc,0xa,0x4,0xe,0xf,0x9,0xa,0x3,0x6,0xf,0x9,0x0,0x0,
0x6,0xc,0xa,0xb,0xa,0x7,0xd,0xd,0x8,0xf,0x9,0x1,0x4,
0x3,0x5,0xe,0xb,0x5,0xc,0x2,0x7,0x8,0x2,0x4,0xe
},
{
0x2,0xe,0xc,0xb,0x4,0x2,0x1,0xc,0x7,0x4,0xa,0x7,0xb,
0xd,0x6,0x1,0x8,0x5,0x5,0x0,0x3,0xf,0xf,0xa,0xd,0x3,
0x0,0x9,0xe,0x8,0x9,0x6,0x4,0xb,0x2,0x8,0x1,0xc,0xb,
0x7,0xa,0x1,0xd,0xe,0x7,0x2,0x8,0xd,0xf,0x6,0x9,0xf,
0xc,0x0,0x5,0x9,0x6,0xa,0x3,0x4,0x0,0x5,0xe,0x3
},
{
0xc,0xa,0x1,0xf,0xa,0x4,0xf,0x2,0x9,0x7,0x2,0xc,0x6,
0x9,0x8,0x5,0x0,0x6,0xd,0x1,0x3,0xd,0x4,0xe,0xe,0x0,
0x7,0xb,0x5,0x3,0xb,0x8,0x9,0x4,0xe,0x3,0xf,0x2,0x5,
0xc,0x2,0x9,0x8,0x5,0xc,0xf,0x3,0xa,0x7,0xb,0x0,0xe,
0x4,0x1,0xa,0x7,0x1,0x6,0xd,0x0,0xb,0x8,0x6,0xd
},
{
0x4,0xd,0xb,0x0,0x2,0xb,0xe,0x7,0xf,0x4,0x0,0x9,0x8,
0x1,0xd,0xa,0x3,0xe,0xc,0x3,0x9,0x5,0x7,0xc,0x5,0x2,
0xa,0xf,0x6,0x8,0x1,0x6,0x1,0x6,0x4,0xb,0xb,0xd,0xd,
0x8,0xc,0x1,0x3,0x4,0x7,0xa,0xe,0x7,0xa,0x9,0xf,0x5,
0x6,0x0,0x8,0xf,0x0,0xe,0x5,0x2,0x9,0x3,0x2,0xc
},
{
0xd,0x1,0x2,0xf,0x8,0xd,0x4,0x8,0x6,0xa,0xf,0x3,0xb,
0x7,0x1,0x4,0xa,0xc,0x9,0x5,0x3,0x6,0xe,0xb,0x5,0x0,
0x0,0xe,0xc,0x9,0x7,0x2,0x7,0x2,0xb,0x1,0x4,0xe,0x1,
0x7,0x9,0x4,0xc,0xa,0xe,0x8,0x2,0xd,0x0,0xf,0x6,0xc,
0xa,0x9,0xd,0x0,0xf,0x3,0x3,0x5,0x5,0x6,0x8,0xb
} };
static const ULONG8 keyleft[28] = {/*等分密钥*/
57,49,41,33,25,17,9,1,58,50,42,34,26,18,
10,2,59,51,43,35,27,19,11,3,60,52,44,36};
static const ULONG8 keyright[28] = {/*等分密钥*/
63,55,47,39,31,23,15,7,62,54,46,38,30,22,
14,6,61,53,45,37,29,21,13,5,28,20,12,4};
static const ULONG8 lefttable[16] = {1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};/*密钥移位*/
static const ULONG8 keychoose[48] ={/*密钥选取*/
14,17,11,24,1,5,3,28,15,6,21,10,
23,19,12,4,26,8,16,7,27,20,13,2,
41,52,31,37,47,55,30,40,51,45,33,48,
44,49,39,56,34,53,46,42,50,36,29,32};
static const ULONG32 wz_leftandtab[3] = {0x0 , 0x80000000 , 0xc0000000 } ;
class CDesOperate
{
private:
ULONG32 m_arrOutKey[16][2];/*输出的key*/
ULONG32 m_arrBufKey[2];/*形成起始密钥*/
INT32 MakeData(ULONG32 *left ,ULONG32 *right ,ULONG32 number)
{
INT32 j;
ULONG32 oldright = *right;
ULONG8 rexpbuf[8] = { 0} ;
ULONG32 datatmp = 0;
ULONG32 exdes_P[2] = { 0} ;
//由32扩充至48位
for ( j = 0 ; j < 48 ; j++)
{
/*两个32位，每个存放24位*/
if ( j < 24 )
{
if ( *right&pc_by_bit[des_E[j]-1] )
{
exdes_P[0] |= pc_by_bit[j] ;
}
}
else
{
if ( *right&pc_by_bit[des_E[j]-1] )
{
exdes_P[1] |= pc_by_bit[j-24] ;
}
}
}
for ( j = 0 ; j < 2 ; j++)
{
exdes_P[j] ^= m_arrOutKey[number][j] ;
}
/*由48－>32*/
exdes_P[1] >>= 8 ;
rexpbuf[7] = (ULONG8) (exdes_P[1]&0x0000003fL) ;
exdes_P[1] >>= 6 ;
rexpbuf[6] = (ULONG8) (exdes_P[1]&0x0000003fL) ;
exdes_P[1] >>= 6 ;
rexpbuf[5] = (ULONG8) (exdes_P[1]&0x0000003fL) ;
exdes_P[1] >>= 6 ;
rexpbuf[4] = (ULONG8) (exdes_P[1]&0x0000003fL) ;
exdes_P[0] >>= 8 ;
rexpbuf[3] = (ULONG8) (exdes_P[0]&0x0000003fL) ;
exdes_P[0] >>= 6 ;
rexpbuf[2] = (ULONG8) (exdes_P[0]&0x0000003fL) ;
exdes_P[0] >>= 6 ;
rexpbuf[1] = (ULONG8) (exdes_P[0]&0x0000003fL) ;
exdes_P[0] >>= 6 ;
rexpbuf[0] = (ULONG8) (exdes_P[0]&0x0000003fL) ;
exdes_P[0] = 0 ;
exdes_P[1] = 0 ;
/*由48－> 32*/
*right = 0 ;
for ( j = 0 ; j < 7 ; j++)
{
*right |= des_S[j][rexpbuf[j]] ;
*right <<= 4 ;
}
*right |= des_S[j][rexpbuf[j]] ;
/*又要换位了*/
datatmp = 0;
for ( j = 0 ; j < 32 ; j++)
{
if ( *right&pc_by_bit[des_P[j]-1] )
{
datatmp |= pc_by_bit[j] ;
}
}
*right = datatmp ;
/*一轮结束收尾操作*/
*right ^= *left;
*left = oldright;
return SUCCESS;
}
INT32 HandleData(ULONG32 *left , ULONG8 choice)
{
INT32 number = 0 ,j = 0;
ULONG32 *right = &left[1] ;
ULONG32 tmp = 0;
ULONG32 tmpbuf[2] = { 0 };
/*第一次调整pc_first[64]*/
for ( j = 0 ; j < 64 ; j++)
{
if (j < 32 )
{
if ( pc_first[j] > 32)/*属于right*/
{
if ( *right&pc_by_bit[pc_first[j]-1] )
{
tmpbuf[0] |= pc_by_bit[j] ;
}
}
else
{
if ( *left&pc_by_bit[pc_first[j]-1] )
{
tmpbuf[0] |= pc_by_bit[j] ;
}
}
}
else
{
if ( pc_first[j] > 32)/*属于right*/
{
if ( *right&pc_by_bit[pc_first[j]-1] )
{
tmpbuf[1] |= pc_by_bit[j] ;
}
}
else
{
if ( *left&pc_by_bit[pc_first[j]-1] )
{
tmpbuf[1] |= pc_by_bit[j] ;
}
}
}
}
*left = tmpbuf[0];
*right = tmpbuf[1];
tmpbuf[0] = 0 ;
tmpbuf[1] = 0 ;
switch(choice)
{
case DESENCRY:
for ( number = 0 ; number < 16 ; number++)
{
MakeData( left , right , (ULONG32)number);
}
break;
case DESDECRY:
for (number=15;number>=0;number--)
{
MakeData( left , right ,(ULONG32)number);
}
break;
default:
break;
}
/*最后一轮操作不交换左右值*/
tmp = *left ;
*left = *right ;
*right = tmp ;
/*最后一次调整pc_last[64]*/
for ( j = 0 ; j < 64 ; j++)
{
if (j < 32 )
{
if ( pc_last[j] > 32)/*属于right*/
{
if ( *right&pc_by_bit[pc_last[j]-1] )
{
tmpbuf[0] |= pc_by_bit[j] ;
}
}
else
{
if ( *left&pc_by_bit[pc_last[j]-1] )
{
tmpbuf[0] |= pc_by_bit[j] ;
}
}
}
else
{
if ( pc_last[j] > 32)/*属于right*/
{
if ( *right&pc_by_bit[pc_last[j]-1] )
{
tmpbuf[1] |= pc_by_bit[j] ;
}
}
else
{
if ( *left&pc_by_bit[pc_last[j]-1] )
{
tmpbuf[1] |= pc_by_bit[j] ;
}
}
}
}
*left = tmpbuf[0] ;
*right = tmpbuf[1];
return SUCCESS;
}
INT32 MakeKey( ULONG32 *keyleft,ULONG32 *keyright ,ULONG32 number)
{
ULONG32 tmpkey[2] ={0};
ULONG32 *Ptmpkey = (ULONG32*)tmpkey;
ULONG32 *Poutkey = (ULONG32*)&m_arrOutKey[number];
INT32 j;
memset((ULONG8*)tmpkey,0,sizeof(tmpkey));
/*要最高的一位或两位*/
*Ptmpkey = *keyleft&wz_leftandtab[lefttable[number]] ;
Ptmpkey[1] = *keyright&wz_leftandtab[lefttable[number]] ;
if ( lefttable[number] == 1)
{
*Ptmpkey >>= 27;
Ptmpkey[1] >>= 27;
}
else
{
*Ptmpkey >>= 26;
Ptmpkey[1] >>= 26;
}
Ptmpkey[0] &= 0xfffffff0;
Ptmpkey[1] &= 0xfffffff0;
/*得到高位的值*/
*keyleft <<= lefttable[number] ;
*keyright <<= lefttable[number] ;
*keyleft |= Ptmpkey[0] ;
*keyright |= Ptmpkey[1] ;
Ptmpkey[0] = 0;
Ptmpkey[1] = 0;
/*从56位中选出48位,3个16位*/
for ( j = 0 ; j < 48 ; j++)
{
if ( j < 24 )
{
if ( *keyleft&pc_by_bit[keychoose[j]-1])
{
Poutkey[0] |= pc_by_bit[j] ;
}
}
else /*j>=24*/
{
if ( *keyright&pc_by_bit[(keychoose[j]-28)])
{
Poutkey[1] |= pc_by_bit[j-24] ;
}
}
}
return SUCCESS;
}
INT32 MakeFirstKey( ULONG32 *keyP )
{
ULONG32 key[2] = {0};
ULONG32 *Pkey ;
ULONG32 *Pbufkey ;
INT32 j;
Pbufkey = (ULONG32*)m_arrBufKey ;
Pkey = (ULONG32*)key;
memset((ULONG8*)m_arrBufKey,0,sizeof(m_arrBufKey));
memcpy((ULONG8*)&key,(ULONG8*)keyP ,8) ;
memset((ULONG8*)m_arrOutKey,0,sizeof(m_arrOutKey));
for( j = 0 ; j < 28 ; j++)
{
if ( keyleft[j] > 32 )
{
if ( Pkey[1]&pc_by_bit[keyleft[j]-1] )
{
Pbufkey[0] |= pc_by_bit[j] ;
}
}
else
{
if ( Pkey[0]&pc_by_bit[keyleft[j]-1] )
{
Pbufkey[0] |= pc_by_bit[j] ;
}
}
if ( keyright[j] > 32 )
{
if ( Pkey[1]&pc_by_bit[keyright[j]-1] )
{
Pbufkey[1] |= pc_by_bit[j];
}
}
else
{
if ( Pkey[0]&pc_by_bit[keyright[j]-1] )
{
Pbufkey[1] |= pc_by_bit[j];
}
}
}
for (j = 0 ; j < 16 ; j++)
{
MakeKey(&Pbufkey[0],&Pbufkey[1] , j ) ;
}
return SUCCESS;
}
public:
CDesOperate()
{
for(int i =0 ;i<2;i++)
{
for(int j = 0;j<16;j++)
{
this->m_arrOutKey[j][i] = 0;
}
this->m_arrBufKey[i] = 0;
}
}
INT32 Encry(char* pPlaintext,int nPlaintextLength,char *pCipherBuffer,int &nCipherBufferLength, char *pKey,int nKeyLength)
{
if(nKeyLength != 8)
{
return 0;
}
MakeFirstKey((ULONG32 *)pKey);
int nLenthofLong = ((nPlaintextLength+7)/8)*2;
if(nCipherBufferLength<nLenthofLong*4)
{//out put buffer is not enough
nCipherBufferLength=nLenthofLong*4;
return 0;
}
memset(pCipherBuffer,0,nCipherBufferLength);
ULONG32 *pOutPutSpace = (ULONG32 *)pCipherBuffer;
ULONG32 *pSource;
if(nPlaintextLength != sizeof(ULONG32)*nLenthofLong)
{
pSource = new ULONG32[nLenthofLong];
memset(pSource,0,sizeof(ULONG32)*nLenthofLong);
memcpy(pSource,pPlaintext,nPlaintextLength);
}
else
{
pSource = (ULONG32 *)pPlaintext;
}
ULONG32 gp_msg[2] = {0,0};
for (int i=0;i<(nLenthofLong/2);i++)
{
gp_msg[0] = pSource[2*i];
gp_msg[1] =pSource[2*i+1];
HandleData(gp_msg,DESENCRY);
pOutPutSpace[2*i] = gp_msg[0];
pOutPutSpace[2*i+1] = gp_msg[1];
}
if(pPlaintext!=(char *)pSource)
{
delete []pSource;
}
return SUCCESS;
}
INT32 Decry(char* pCipher,int nCipherBufferLength,char *pPlaintextBuffer, int &nPlaintextBufferLength, char *pKey,int nKeyLength)
{
if(nCipherBufferLength%8!=0)
{
return 0;
}
if(nPlaintextBufferLength<nCipherBufferLength)
{
nPlaintextBufferLength = nCipherBufferLength;
return 0;
}
if(nKeyLength != 8)
{
return 0;
}
MakeFirstKey((ULONG32 *)pKey);
memset(pPlaintextBuffer,0,nPlaintextBufferLength);
ULONG32 *pSouce = (ULONG32 *)pCipher;
ULONG32 *pDest = (ULONG32 *)pPlaintextBuffer;
ULONG32 gp_msg[2] = {0,0};
for (int i=0;i<(nCipherBufferLength/8);i++)
{
gp_msg[0] = pSouce[2*i];
gp_msg[1] = pSouce[2*i+1];
HandleData(gp_msg,DESDECRY);
pDest[2*i] = gp_msg[0];
pDest[2*i+1] = gp_msg[1];
}
return SUCCESS;
}
};
chat.cpp
#include <stdio.h>
#include <netdb.h>
#include <unistd.h>
#include <iostream>
#include <stdlib.h>
#include <errno.h>
#include <net/if.h>
#include <string.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <memory.h>
#include <sys/ioctl.h>
#include "des.h"
using namespace std;
#define SERVERPORT 9527
#define BUFFERSIZE 32
char strStdinBuffer[BUFFERSIZE];
char strSocketBuffer[BUFFERSIZE];
char strEncryBuffer[BUFFERSIZE];
char strDecryBuffer[BUFFERSIZE];
void SecretChat(int nSock,char *pRemoteName, char *pKey)
{
CDesOperate cDes;
if(strlen(pKey)!=8)
{
printf("Key length error");
return ;
}
pid_t nPid;
nPid = fork();
if(nPid != 0)
{
while(1)
{
bzero(&strSocketBuffer, BUFFERSIZE);
int nLength = 0;
nLength = recv(nSock, strSocketBuffer,BUFFERSIZE,0);
if(nLength !=BUFFERSIZE)
{
break;
}
else
{
int nLen = BUFFERSIZE;
cDes.Decry(strSocketBuffer,BUFFERSIZE,strDecryBuffer,nLen,pKey,8);
strDecryBuffer[BUFFERSIZE-1]=0;
if(strDecryBuffer[0]!=0&&strDecryBuffer[0]!='\n')
{
printf("Receive message form <%s>: %s\n", pRemoteName,strDecryBuffer);
if(0==memcmp("quit",strDecryBuffer,4))
{
printf("Quit!\n");
break;
}
}
}
}
}
else
{
while(1)
{
bzero(&strStdinBuffer, BUFFERSIZE);
while(strStdinBuffer[0]==0)
{
if (fgets(strStdinBuffer, BUFFERSIZE, stdin) == NULL)
{
continue;
}
}
int nLen = BUFFERSIZE;
cDes.Encry(strStdinBuffer,BUFFERSIZE,strEncryBuffer,nLen,pKey,8);
if(send(nSock, strEncryBuffer, BUFFERSIZE,0)!=BUFFERSIZE)
{
perror("send");
}
else
{
if(0==memcmp("quit",strStdinBuffer,4))
{
printf("Quit!\n");
break;
}
}
}
}
}
int main(int argc,char * [])
{
printf("Client or Server?\r\n");
cin>>strStdinBuffer;
if(strStdinBuffer[0]=='c'||strStdinBuffer[0]=='C')
{//be a client
char strIpAddr[16];
printf("Please input the server address:\r\n");
cin>>strIpAddr;
int nConnectSocket, nLength;
struct sockaddr_in sDestAddr;
if ((nConnectSocket = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
perror("Socket");
exit(errno);
}
bzero(&sDestAddr, sizeof(sDestAddr));
sDestAddr.sin_family = AF_INET;
sDestAddr.sin_port = htons(SERVERPORT);
sDestAddr.sin_addr.s_addr = inet_addr(strIpAddr);
/* 连接服务器 */
if (connect(nConnectSocket, (struct sockaddr *) &sDestAddr, sizeof(sDestAddr)) != 0)
{
perror("Connect ");
exit(errno);
}
else
{
printf("Connect Success! \nBegin to chat...\n");
SecretChat(nConnectSocket,strIpAddr,"benbenmi");
}
close(nConnectSocket);
}
else
{//be a server
int nListenSocket, nAcceptSocket;
socklen_t nLength = 0;
struct sockaddr_in sLocalAddr, sRemoteAddr;
if ((nListenSocket = socket(PF_INET, SOCK_STREAM, 0)) == -1)
{
perror("socket");
exit(1);
}
bzero(&sLocalAddr, sizeof(sLocalAddr));
sLocalAddr.sin_family = PF_INET;
sLocalAddr.sin_port = htons(SERVERPORT);
sLocalAddr.sin_addr.s_addr = INADDR_ANY;
if (bind(nListenSocket, (struct sockaddr *) &sLocalAddr, sizeof(struct sockaddr))== -1)
{
perror("bind");
exit(1);
}
if (listen(nListenSocket, 5) == -1)
{
perror("listen");
exit(1);
}
printf("Listening...\n");
nLength = sizeof(struct sockaddr);
if ((nAcceptSocket = accept(nListenSocket, (struct sockaddr *) &sRemoteAddr,&nLength)) == -1)
{
perror("accept");
exit(errno);
}
else
{
close(nListenSocket);
printf("server: got connection from %s, port %d, socket %d\n",inet_ntoa(sRemoteAddr.sin_addr),ntohs(sRemoteAddr.sin_port), nAcceptSocket);
SecretChat(nAcceptSocket,inet_ntoa(sRemoteAddr.sin_addr),"benbenmi");
close(nAcceptSocket);
}
}
}