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Class to Determine a Local Machine's IP Address

, 23 Aug 2002
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This is a class for determining a local machine's IP address using iphlpapi or sockets and to convert between a couple of standard formats
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Introduction

I would like to thank Igor Proskuriakov, Len Holgate, and Farooque Khan. My purpose for this class is to programatically determine the IP address that is assigned to a local machine. This class will return the machine's IP address in the form of a CString, a DWORD in host byte order, and a DWORD in network byte order.

IPAddressBase Class Usage

An object of this class will contain an IP address value and perform format conversion. The IP address is stored in a CString. Member functions have been provided to converted the stored CString to a network byte order DWORD or host byte order DWORD. The default constuctor initializes the class's data member m_csAddress to "127.0.0.1".
	void SetHBO(DWORD dwInValue);
Member function SetHBO(DWORD dwInValue) takes a DWORD value(in host byte order) and coverts the value to a CString. The CString equivalent is then stored in m_csAddress;
	void SetNBO(DWORD dwInValue);
Member function SetNBO(DWORD dwInValue) takes a DWORD value(in network byte order) and coverts the value to a CString. The CString equivalent is then stored in m_csAddress;
	void SetString(CString csInString);
Member function SetString(CString csInString) takes a CString and stores the value in m_csAddress;
	DWORD GetHBO()const;
Member function GetHBO()const coverts m_csAddress to a DWORD in host byte order and returns that converted value.
	DWORD GetNBO()const;
Member function GetNBO()const coverts m_csAddress to a DWORD in network byte order and returns that converted value.
	CString GetString()const;
Member function GetString()const returns m_csAddress.

LocalIPQuery Class Usage

This class performs the extraction of the machine's IP address/addresses. This class contains two different methods for extraction that are programmer selectable with conditional compilation. The container that holds the extracted IP address/addresses is a STL vector.

The LIPQ_MULTI method is derived from Farooque Khan's "Using IP Helper API’s" article. This method takes the local machine's TCP/IP table and extracts each active unique IP address on the local machine. The extracted values are stored as IPAddressBase objects in the vector.

The LIPQ_PORTABLE method is from http://tangentsoft.net/wskfaq/examples/ipaddr.html. This method extracts the local machine IP address from a socket it creates. The extracted value is stored as an IPAddressBase object in the vector. This method will only extract a single IP address, but it is portable since it uses sockets.

Selection of the methods is done in the LocalIPQuery.h file.

To use LIPQ_MULTI verify that the LocalIPQuery header file is configured as follows before compiling

// User must choose which method they want to use
//#define USE_THIS	LIPQ_PORTABLE
#define USE_THIS	LIPQ_MULTI
To use LIPQ_PORTABLE verify that the LocalIPQuery header file is configured as follows before compiling
// User must choose which method they want to use
#define USE_THIS	LIPQ_PORTABLE
//#define USE_THIS	LIPQ_MULTI

The Dialog App

The dialog app shows the extracted IP address/addresses and one way of using the LocalIPQuery class with an IP Address Control.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

About the Author

niverson

United States United States
No Biography provided

Comments and Discussions

 
GeneralThings to improve. PinmemberLen Holgate21-Aug-02 0:10 
GeneralRe: Things to improve. PinmemberIgor Proskuriakov21-Aug-02 6:47 
GeneralRe: Things to improve. PinmemberLen Holgate21-Aug-02 6:57 
GeneralRe: Things to improve. Pinmemberniverson24-Aug-02 14:32 
GeneralRe: Things to improve. PinmemberLen Holgate24-Aug-02 23:03 
GeneralRe: Things to improve. Pinmembervmihalj13-Aug-03 22:59 
GeneralUseless PinmemberIgor Proskuriakov20-Aug-02 3:38 
GeneralRe: Useless PinmemberDaniel Turini20-Aug-02 4:00 
GeneralRe: Useless PinmemberIgor Proskuriakov21-Aug-02 6:39 
GeneralRe: Useless Pinmemberniverson20-Aug-02 4:17 
General192.168.x.x PinmemberSwinefeaster19-Aug-02 10:52 
GeneralRe: 192.168.x.x Pinmemberniverson19-Aug-02 13:40 
GeneralRe: 192.168.x.x PinmemberDavid Simmons20-Aug-02 5:00 
GeneralRe: 192.168.x.x PinmemberNeville Franks20-Aug-02 12:07 

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