CPinger.h

#pragma once
#include <WINSOCK2.h>
#include <Iphlpapi.h>
#include <string>

#pragma comment(lib, "wininet.lib")

#pragma pack(push)
#pragma pack(1)

struct IpHead {
	unsigned int    uiHeadLen : 4;            ///<头部长度
	unsigned int    uiVersion : 4;            ///<版本
	unsigned char   ucTos;                  ///<服务类型,type of service
	unsigned short  usTotalLen;             ///<总长度
	unsigned short  usIpId;                 ///<标识
	unsigned short  usFlags;                ///<3位标志+13位片偏移
	unsigned char   ucTtl;                  ///<TTL,time to live
	unsigned char   ucProtocol;             ///<协议
	unsigned short  usCheckSum;             ///<首部总校验和
	unsigned int    uiSrcIP;                ///<源ip
	unsigned int    uiDstIP;                ///<目的ip
};

struct IcmpHead {
	unsigned char   ucType;                 ///<类型
	unsigned char   ucCode;                 ///<代码
	unsigned short  ususIcmpChkSum;         ///<校验和
	unsigned short  usIcmpId;               ///<id
	unsigned char   usSeq;                  ///<序号
	unsigned long   ulTimeStamp;            ///<时间戳
};

#pragma pack(pop)


#define DEF_PACKET_SIZE     32
#define ECHO_REQUEST        8
#define ECHO_REPLY          0
#define ICMP_ECHOREPLY      0
#define ICMP_MIN            sizeof(IcmpHead)
#define ICMP_ECHO           8

class Pinger
{
public:
	Pinger();
	virtual ~Pinger();

	/**
	* @brief ping          ping指定ip地址
	* @param dstIP         目的ip，不能包含空格等非法字符
	* @param packNum       一共ping几包
	* @param sndTime       发送超时时间，单位毫秒
	* @param rcvTime       接收超时时间，单位毫秒
	* @return              成功ping通的包数，大于0表示ping通
	*/
	int ping(const char* dstIP, const int& packNum, const int &sndTime, const int &rcvTime);

	/**
	* @brief getTips       获取提示信息
	* @return              提示信息
	*/
	std::string getTips() const { return m_strTips_; }

protected:

	/**
	* @brief checkSum      计算校验和
	* @param buf           待计算缓冲区
	* @param wordCnt       字个数
	* @return              校验和
	*/
	unsigned short checkSum(const WORD *buf, const int &wordCnt);

	/**
	* @brief decodeIcmpHead        解析icmp头
	* @param rcvBuf                头部缓冲区
	* @param bread                 字节数
	* @param from                  来源ip地址
	* @return                      0表示正常，其他见错误码EnErrCode
	*/
	int decodeIcmpHead(char *rcvBuf, unsigned int bread, sockaddr_in *from);

	/**
	* @brief fillImcpData          填充icmp数据
	* @param icmpData              缓冲区
	* @param byteCnt               缓冲区长度
	*/
	void fillIcmpData(char *icmpData, int byteCnt);

	std::string  m_strTips_;                ///<提示信息

private:
	enum EnErrCode {
		EnOK,
		EnNullPtr,
		EnBadData,
		EnInvalidIp,
		EnSockErr,
	};

	unsigned int m_uiId__;                  ///<当前对象id计数

	static unsigned int m_uiCnt__;          ///<总对象创建数计数
};