www.pudn.com > SNMPApp.rar > Ping.h

#ifndef CPING_H 
#define CPING_H 
 
typedef struct tagIPINFO 
{ 
	u_char Ttl;				// Time To Live 
	u_char Tos;				// Type Of Service 
	u_char IPFlags;			// IP flags 
	u_char OptSize;			// Size of options data 
	u_char FAR *Options;	// Options data buffer 
}IPINFO; 
 
typedef IPINFO* PIPINFO; 
 
typedef struct tagICMPECHO 
{ 
	u_long Source;			// Source address 
	u_long Status;			// IP status 
	u_long RTTime;			// Round trip time in milliseconds 
	u_short DataSize;		// Reply data size 
	u_short Reserved;		// Unknown 
	void FAR *pData;		// Reply data buffer 
	IPINFO	ipInfo;			// Reply options 
}ICMPECHO; 
 
typedef ICMPECHO* PICMPECHO; 
 
class CPing 
{ 
public: 
	CPing(); 
	~CPing(); 
	BOOL Ping(char* strHost); 
private: 
	// ICMP.DLL Export Function Pointers 
	HANDLE (WINAPI *pIcmpCreateFile)(VOID); 
	BOOL (WINAPI *pIcmpCloseHandle)(HANDLE); 
	DWORD (WINAPI *pIcmpSendEcho) 
		(HANDLE,DWORD,LPVOID,WORD,PIPINFO,LPVOID,DWORD,DWORD); 
	HANDLE hndlIcmp;	// LoadLibrary() handle to ICMP.DLL 
	BOOL bValid; // if it doesn't construct properly, it won't be valid 
}; 
 
#endif