125 lines
3.0 KiB
C++
125 lines
3.0 KiB
C++
// Ping.cpp : implementation file
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//
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#include "stdafx.h"
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#include "ConnMgr.h"
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#include "Ping.h"
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extern "C"
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{
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#include <ipexport.h>
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#include <icmpapi.h>
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}
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#define PING_TIMEOUT 100
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#ifdef _DEBUG
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#define new DEBUG_NEW
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#undef THIS_FILE
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static char THIS_FILE[] = __FILE__;
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#endif
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/////////////////////////////////////////////////////////////////////////////
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// CPing
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CPing::CPing()
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{
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}
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CPing::~CPing()
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{
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}
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/////////////////////////////////////////////////////////////////////////////
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// Operations
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/////////////////////////////////////////////////////////////////////////////
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unsigned long CPing::ResolveIP(const CString& sIP)
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{
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//Task 1: Given IP Address i.e. "111.111.111.111",
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// Return Network byte ordered address (ulIP)
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unsigned long ulIP;
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USES_CONVERSION;
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char* pszIP = T2A(sIP);
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ulIP =(IPAddr)inet_addr(pszIP);
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return ulIP;
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}
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unsigned long CPing::ResolveName(const CString& sHostName)
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{
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//Task 1: Resolve HostName (through DNS or WINS, whichever appropriate)
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//Task 2: Return network byte ordered address (ulIP)
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unsigned long ulIP;
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hostent* phostent;
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USES_CONVERSION;
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char* pszName = T2A(sHostName);
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phostent = gethostbyname(pszName);
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if (phostent == NULL)
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{
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for( int i = 0; pszName[i] != NULL; i++ )
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{
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// note that according to RFC 952, the only valid characters are the numbers 0-9,
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// the letters A-Z, the period and the minues sign. All other characters are
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// converted to a minus sign if they are invalid. Technically, the underscore and the
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// exclamation point are invalid as well. However, since NT
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if( (int)pszName[i] <= 0 )
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{
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pszName[i] = '-';
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}
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}
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phostent = gethostbyname(pszName);
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if (phostent == NULL)
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return 0;
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}
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ulIP = *(DWORD*)(*phostent->h_addr_list);
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return ulIP;
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}
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BOOL CPing::Ping(unsigned long ulIP, int iPingTimeout)
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{
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//Task 1: Open ICMP Handle
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//Task 2: Create Structure to receive ping reply
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//Task 3: SendPing (SendEcho)
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//Task 4: Close ICMP Handle
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//Task 5: Return RoundTripTime
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unsigned long ip = ulIP;
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HANDLE icmphandle = IcmpCreateFile();
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char reply[sizeof(icmp_echo_reply)+8];
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icmp_echo_reply* iep = (icmp_echo_reply*)&reply;
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iep->RoundTripTime = 0xffffffff;
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for (int i = 0; i < ICMP_ECHO_RETRY; i++)
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if (IcmpSendEcho(icmphandle,ip,0,0,NULL,reply,sizeof(icmp_echo_reply)+8,iPingTimeout))
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break;
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IcmpCloseHandle(icmphandle);
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return iep->Status == IP_SUCCESS;
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}
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CString CPing::GetIP(unsigned long ulIP)
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{
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//Task 1: Given a host order ulIP Address
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// Return a IP address in format of xxx.xxx.xxx.xxx
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char* szAddr;
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struct in_addr inetAddr;
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inetAddr.s_addr = (IPAddr)ulIP;
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szAddr = inet_ntoa(inetAddr);
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USES_CONVERSION;
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CString csIP = A2T(szAddr);
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return csIP;
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}
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// Do not edit the following lines, which are needed by ClassWizard.
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#if 0
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BEGIN_MESSAGE_MAP(CPing, CSocket)
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//{{AFX_MSG_MAP(CPing)
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//}}AFX_MSG_MAP
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END_MESSAGE_MAP()
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#endif // 0
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/////////////////////////////////////////////////////////////////////////////
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// CPing member functions
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