Kill TCP Connection源代码

//**********************************************************************
// Version: V1.0
// Coder: WinEggDrop
// Date Release: NULL
// Purpose: Kill An Active TCP Connection
// Test PlatForm: Win 2K Pro And Server SP4
// Compiled On: LCC 3.0,May Compile On VC++ 6.0(Not Test Yet)
//**********************************************************************

#include <winsock.h>
#include <windows.h>
#include <stdio.h>
#include <iphlpapi.h>

// Function ProtoType Declaration
//---------------------------------------------------------------------------------------------------------------------------
BOOL KillTCPConnection(const char *LocalAddress,const char *LocalPort,const char *RemoteAddress,const char *RemotePort);
BOOL IsDigits(const char *String);
void Usage(const char *Command);
//---------------------------------------------------------------------------------------------------------------------------
// End Of Fucntion ProtoType Declaration

// Main Function
int main(int argc,char *argv[])
{
if (argc!=5)     // There Are Not 5 Arguement In Total
{
    Usage(argv[0]);     // Display The Usage
    return -1;    // Quit The Program
}

KillTCPConnection(argv[1],argv[2],argv[3],argv[4]);     // Kill The TCP Connection
return 0;     // Quit The Program
}// End Of Main Function

//-------------------------------------------------------------------------
// Purpose: To Display The Usage Of The Program
// Return Type: Void
// Parameters:  Const Char *Command
//-------------------------------------------------------------------------
void Usage(const char *Command)
{
printf("\r\nUsage: %s LocalAddress LocalPort RemoteAddress,RemotePort\r\n",Command);     // Display The Usage
printf("Example: %s 192.168.0.1 1234 12.12.12.12 22222\r\n",Command);     // Display A Example
}// End Of Usage Function

//-------------------------------------------------------------------------
// Purpose: To Check Whether The String Is Really A Number
// Return Type: Boolean
// Parameters:  Const Char *String
//-------------------------------------------------------------------------
BOOL IsDigits(const char *String)
{
int StringLength = strlen(String);    // Get The Length Of The String

for (int i = 0;i < StringLength;i++)     // Check Every Character Of The String
{
    if (String[i] < 48 || String[i] > 57)    // The Character Is Not A Digit
    {
       return FALSE;    // Return False
    }
}
return TRUE;     // Return True As All Characters Are Digits
}// End Of IsDigits Function

//--------------------------------------------------------------------------------------------
// Purpose: To Kill An Active TCP Connection
// Return Type: Boolean
// Parameters:
//            1.Const Char *LocalAddress  --> The Local Address Of The TCP Connection
//            2.Const Char *LocalPort     --> The Local Port Of The TCP Connection
//            3.Const Char *RemoteAddress --> The Remote Address Of The TCP Connection
//            4.Const Char *RemotePort    --> The Remote Port Of The TCP Connection
//--------------------------------------------------------------------------------------------
BOOL KillTCPConnection(const char *LocalAddress,const char *LocalPort,const char *RemoteAddress,const char *RemotePort)
{
MIB_TCPROW  TcpRow;    // Declare A TCP Raw

if (!IsDigits(LocalPort))    // The Local Port Is Not A Number
{
    printf("Invalid Local Port\r\n");     // Display Error Message
    return FALSE;    // Return False
}

if (atoi(LocalPort) < 0 || atoi(LocalPort) > 65535)     // The Local Port Is Out Of Bound
{
    printf("Local Port Out Of Bound\r\n");      // Display Error Message
    return FALSE;    // Return False
}

if (!IsDigits(RemotePort))      // The Remote Port Is Not A Number
{
    printf("Invalid Remote Port\r\n");    // Display Error Message
    return FALSE;    // Return False
}

if (atoi(RemotePort) < 0 || atoi(RemotePort) > 65535)      // The Remote Port Is Out Of Bound
{
    printf("Remote Port Out Of Bound\r\n");     // Display Error Message
    return FALSE;    // Return False
}

// Set The TCP Row Entry
TcpRow.dwLocalPort = htons(atoi(LocalPort));
TcpRow.dwRemotePort = htons(atoi(RemotePort));
TcpRow.dwLocalAddr = inet_addr(LocalAddress);
TcpRow.dwRemoteAddr = inet_addr(RemoteAddress);
TcpRow.dwState = MIB_TCP_STATE_DELETE_TCB;     // Flag To Indicate The System To End That TCP Connection

if (SetTcpEntry(&TcpRow) == NO_ERROR)    // Call The API With No Error
{
    printf("Delete The TCP Connection %s:%s-->%s:%s Successfully\r\n",LocalAddress,LocalPort,RemoteAddress,RemotePort);    // Display Successful Message
    return TRUE;     // Return True
}

// Some Error Must Be Occurred
printf("Fail To Delete The TCP Connection Error Code:%d\r\n",GetLastError());      // Display The Error Code
return FALSE;    // Return False
}// End Of KillTCPConnection Function
// End Of File

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