VC封装Ping命令的实现

悠悠 2022-09-24 01:18 208阅读 0赞

# VC封装Ping命令的实现 #

## 需求 ##

网络设备连接PC时，网卡生效比较慢。但是只有当网卡生效了才能开始操作失败，做一些功能测试。这个就需要不断的检测网络状态了。

## 实现思路 ##

封装Ping命令到一个线程类中，在程序启动时开启这个线程。如果能够ping通的话，界面弄个指示灯用来显示状态。

## 实现代码 ##

这个给出封装好的头文件，源文件获取地址： [http://download.csdn.net/detail/shufac/9583129][http_download.csdn.net_detail_shufac_9583129]

ping.h

// Ping.h
    #pragma pack(1)
    
    #define ICMP_ECHOREPLY	0
    #define ICMP_ECHOREQ	8
    class CPing
    {
    public:
    	HWND m_hWnd;
    	void Ping(UINT nRetries,LPCSTR pstrHost,HWND hWnd);
    	int  WaitForEchoReply(SOCKET s);
    	// ICMP Echo Request/Reply functions
    	int		SendEchoRequest(SOCKET, LPSOCKADDR_IN);
    	DWORD	RecvEchoReply(SOCKET, LPSOCKADDR_IN, u_char *);
    	u_short in_cksum(u_short *addr, int len);
    protected:
    	void WSAError(LPCSTR pstrFrom);
    };
    // 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;
    
    #define REQ_DATASIZE 32		// Echo Request Data size
    // 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()

PingThread.h

// PingThread.h: interface for the CPingThread class.
    //
    //
    
    #if !defined(AFX_PINGTHREAD_H__88E7C296_2B7A_4A67_AA7B_C89EA8D3BAAC__INCLUDED_)
    #define AFX_PINGTHREAD_H__88E7C296_2B7A_4A67_AA7B_C89EA8D3BAAC__INCLUDED_
    
    #if _MSC_VER > 1000
    #pragma once
    #endif // _MSC_VER > 1000
    
    #include "Ping.h"
    class CPingThread  
    {
    public:
    	CPingThread();
    	virtual ~CPingThread();
    
    	UINT	m_dwID;
    	HANDLE	m_hThread;
    	HANDLE	m_hKillEvent;
    	HANDLE	m_hSignalEvent;
    
    	static UINT __stdcall  ThreadProc(void* pThis);
    
    	void StartPing(UINT nRetries,CString strHost,HWND hWnd);
    
    	CPing	m_ping;
    	CString m_strHost;
    	HWND	m_hWnd;
    	UINT	m_nRetries;
    
    };
    
    #endif // !defined(AFX_PINGTHREAD_H__88E7C296_2B7A_4A67_AA7B_C89EA8D3BAAC__INCLUDED_)

可从文章结尾处提供的链接获取相关的源码。

在VC工程中添加封装好的Ping线程类，声明这个类对象的成员变量，

CPingThread m_pingThread;

在程序启动时调用即可。

m_pingThread.StartPing(0,ini_ipaddress, m_hWnd);

检测状态消息函数定义为，

LRESULT CMTKUpgradeDlg::OnStatus(WPARAM wParam, LPARAM lParam)
    {
    	char* pMsg = (char*) lParam;
    	ASSERT(pMsg);
    	const char* pMsgData = NULL;
    	pMsgData = strstr((const char*)pMsg,"bytes=");
    	bool bIsConnected=false;
    	if (pMsgData!=NULL)
    	{
    		bIsConnected=true;
    	}
    	if (bIsConnected)
    	{
    		StateDisplay(3);
    	}
    	else
    	{
    		StateDisplay(4);
    	}
    	delete pMsg;
    	return 0;
    }
    
    LRESULT CMTKUpgradeDlg::OnPingEnd(WPARAM wParam, LPARAM lParam)
    {
    	ASSERT("-End-");
    	return 0;
    }

工程源码获取地址：[http://download.csdn.net/detail/shufac/9583129][http_download.csdn.net_detail_shufac_9583129]

[http_download.csdn.net_detail_shufac_9583129]: http://download.csdn.net/detail/shufac/9583129