//ping.h #ifndef _CPING_H_ #define _CPING_H_ #pragma pack(1) #define ICMP_ECHOREPLY 0 #define ICMP_ECHOREQ 8 #define REQ_DATASIZE 32 // Echo 请求数据的大小 class CPing { public: //ping host, nRetries-ping次数 bool Ping(LPCSTR pstrHost, UINT nRetries = 4); void Result(int* nElapseTime, float* fMissPack = NULL, u_char* cTTL = NULL); //void Result(CPing::REQ_RESULT& result); private: int WaitForEchoReply(SOCKET s); //ICMP回应的请求和回答函数 int SendEchoRequest(SOCKET, LPSOCKADDR_IN); DWORD RecvEchoReply(SOCKET, LPSOCKADDR_IN, u_char *); u_short in_cksum(u_short *addr, int len); private: struct REQ_RESULT { int nElapseTime; //请求响应时间。 u_char cTTL; //请求TTL(生存时间) float fMissPack; //丢包率 }; REQ_RESULT m_Result; }; // IP Header -- RFC 791 typedef struct tagIPHDR { u_char VIHL; // Version and IHL u_char TOS; // Type Of Service short TotLen; // Total Length short ID; // Identification short FlagOff; // Flags and Fragment Offset u_char TTL; // Time To Live u_char Protocol; // Protocol u_short Checksum; // Checksum struct in_addr iaSrc; // Internet Address - Source struct in_addr iaDst; // Internet Address - Destination }IPHDR, *PIPHDR; // ICMP Header - RFC 792 typedef struct tagICMPHDR { u_char Type; // Type u_char Code; // Code u_short Checksum; // Checksum u_short ID; // Identification u_short Seq; // Sequence char Data; // Data }ICMPHDR, *PICMPHDR; // ICMP Echo Request typedef struct tagECHOREQUEST { ICMPHDR icmpHdr; DWORD dwTime; char cData[REQ_DATASIZE]; }ECHOREQUEST, *PECHOREQUEST; // ICMP Echo Reply typedef struct tagECHOREPLY { IPHDR ipHdr; ECHOREQUEST echoRequest; char cFiller[256]; }ECHOREPLY, *PECHOREPLY; #pragma pack() #endif