// Operations
　public:
　　CIcmp(void);
　　CIcmp(CIcmp &copy);
　　~CIcmp(void);
　public:
　　// I/O Buffer Pointers
　　LPIcmpHeader pIcmpHeader;
　　LPIpHeader pIpHeader;

　　SOCKET icmpSocket;
　　SOCKADDR_IN icmpSockAddr;
　　SOCKADDR_IN rcvSockAddr;
　　DWORD icmpRoundTripTime;
　　DWORD icmpPingSentAt;
　　DWORD icmpPingReceivedAt;

　　int icmpRcvLen;
　　int icmpHops;
　　int icmpMaxHops;
　　int icmpCurSeq;
　　int icmpCurId;
　　int icmpPingTimer;
　　int icmpSocketError;
　　int icmpSocketErrorMod;
　　unsigned long icmpHostAddress;
　protected:
};

　　初始化网络连接的函数：

BOOL CIcmp::Connect(LPINT ReceiveTimeout, LPINT SendTimeout, int AFamily, int AType, int AProtocol)
{
　int Result;
　icmpSocket = NULL;
　icmpSocket = socket(AFamily, AType, AProtocol);

　if (icmpSocket == INVALID_SOCKET)
　{
　　icmpSocketError = WSAGetLastError();
　　icmpSocketErrorMod = 1;
　　return FALSE;
　}

　//
　// Set receive timeout
　//

　Result = setsockopt(icmpSocket, SOL_SOCKET, SO_RCVTIMEO, (char*)ReceiveTimeout, sizeof(int));
　if (Result == SOCKET_ERROR)
　{
　　icmpSocketError = WSAGetLastError();
　　icmpSocketErrorMod = 2;
　　closesocket(icmpSocket);
　　icmpSocket = INVALID_SOCKET;
　　return FALSE;
　}

　//
　// Set send timeout
　//
　Result = setsockopt(icmpSocket, SOL_SOCKET, SO_SNDTIMEO, (char*)SendTimeout,sizeof(int));
　if (Result == SOCKET_ERROR)
　{
　　icmpSocketError = WSAGetLastError();
　　icmpSocketErrorMod = 3;
　　closesocket(icmpSocket);
　　icmpSocket = INVALID_SOCKET;
　　return FALSE;
　}
　icmpCurSeq = 0;
　icmpCurId = (USHORT)GetCurrentProcessId();
　icmpHops = 0;

　return TRUE;
}

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