X_MSG

// Implementation
protected:
};
/////////////////////////////////////////////////////////////////////////////
//*
//------------------------------------------------------------------------------------------------------------------
//icmpecho.cpp
//------------------------------------------------------------------------------------------------------------------
//*
// IcmpEcho.cpp : implementation file
//

#include "IcmpEcho.h"

extern "C" {
#include "ipexport.h"
#include "icmpapi.h"
}

#define PING_TIMEOUT 100

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CIcmpEcho

CIcmpEcho::CIcmpEcho()
{
}

CIcmpEcho::~CIcmpEcho()
{
}


// Do not edit the following lines, which are needed by ClassWizard.
#if 0
BEGIN_MESSAGE_MAP(CIcmpEcho, CSocket)
    //{{AFX_MSG_MAP(CIcmpEcho)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()
#endif    // 0

/////////////////////////////////////////////////////////////////////////////
// CIcmpEcho member functions
unsigned long CIcmpEcho::ResolveIP(CString strIP)
{
    //Task 1:    Given IP Address i.e. "111.111.111.111",
    //    Return Network byte ordered address (ulIP)

    unsigned long ulIP;

    ulIP =(IPAddr)inet_addr(strIP);

    return ulIP;
}

unsigned long CIcmpEcho::ResolveName(CString strHostName)
{
    //Task 1:    Resolve HostName (through DNS or WINS, whichever appropriate)
    //Task 2:    Return network byte ordered address (ulIP)

    unsigned long ulIP;
    hostent* phostent;

    phostent = gethostbyname(strHostName);
    
    if (phostent == NULL)
        return 0;

    ulIP = *(DWORD*)(*phostent->h_addr_list);

    return ulIP;

}

DWORD CIcmpEcho::PingHost(unsigned long ulIP, int iPingTimeout)
{
    //Task 1:    Open ICMP Handle
    //Task 2:    Create Structure to receive ping reply
    //Task 3:    SendPing (SendEcho)
    //Task 4:    Close ICMP Handle
    //Task 5:    Return RoundTripTime

    unsigned long ip = ulIP;

    HANDLE icmphandle = IcmpCreateFile();

    char reply[sizeof(icmp_echo_reply)+8];

    icmp_echo_reply* iep=(icmp_echo_reply*)&reply;
    iep->RoundTripTime = 0xffffffff;

    IcmpSendEcho(icmphandle,ip,0,0,NULL,reply,sizeof(icm