Click here to Skip to main content
Click here to Skip to main content

Demonstration of Wlan APIs from MSDN

, 27 Sep 2012
Rate this:
Please Sign up or sign in to vote.
Windows Native API application

Introduction

This sample application is used to demonstrate WlanOpenHandle, WlanEnumInterfaces, WlanRegisterNotification, WlanScan, WlanGetNetworkBssList, WlanGetAvailableNetworkList. Parse the IES from the last beacon and probe response from BSS network. Add the IE (Information Element) during the WlanScan request. I have checked with (Intel(R) Centrino(R) Advanced-N 6205). This interface does not allow to send reserved information WiFi IES (52-126 according to the IEEE 802.11 spec) but I am able to include all the others in the scan request. I hope this code will be useful.

Background

Using the Code

Requirements:

  1. Visual Studio
  2. WDK and SDK
  3. Wireshark for verification for added IES in WlanScan request
//open handle session and enumerate all wifi adapters. I have considered first adapter
//only if you have more than one adapter u need to add logic which adapter u need.

int FuncWlanOpenAndEnum()
{
	DWORD dwClientVersion=(IsVistaOrHigher() ? 2 : 1);

	printf("######## FuncWlanOpenAndEnum--->######## \n\n");
    //creating session handle for the client to connect to server.
	hResult=WlanOpenHandle(dwClientVersion,NULL,&pdwNegotiatedVersion,&phClientHandle);
	if(hResult!=ERROR_SUCCESS)
    {
    	printf("failed WlanOpenHandle=%d \n",hResult);
    	return hResult;
    }
	else
    {
    	printf("WlanOpenHandle is success=%d \n",hResult);
    }

    //Enumerates all the wifi adapters currently enabled on PC.
    //Returns the list of interfaces that are enabled on PC.
	hResult=WlanEnumInterfaces(phClientHandle,NULL,&pIfList);
	if(hResult!=ERROR_SUCCESS)
    {
    	printf("failed WlanEnumInterfaces check adapter is on=%d \n",hResult);
    	return hResult;
    }
	else
    {
    	printf("WlanEnumInterfaces is success=%d \n",hResult);
    }

	printf("######## FuncWlanOpenAndEnum<---######## \n \n");
	return hResult;
}

// prints the enumerated the interfaces add stores the interface in global variable
void FuncWlanPrintInterfaceNames()
{
	WCHAR SGuid[256]={0};

	printf("######## FuncWlanPrintInterfaceNames--->######## \n\n");

	for(unsigned int i=0;(i < pIfList->dwNumberOfItems);i++)
    {
        printf("WIFI Adapter Description =%ws \n",
            pIfList->InterfaceInfo[pIfList->dwIndex].strInterfaceDescription);
        StringFromGUID2(pIfList->InterfaceInfo[pIfList->dwIndex].InterfaceGuid,SGuid,256);
    	printf("WIFI Adapter GUID=%ws \n",SGuid);
    }
    
    //assuming PC has only one wifi card
	guidInterface=pIfList->InterfaceInfo[0].InterfaceGuid;

	printf("######## FuncWlanPrintInterfaceNames<---######## \n \n");
}
//you can refer to the sample for the other function 

Points of Interest

It will be the first sample source code that includes IE during scan request. Parsing of IES will be great as it is helpful. We can check that the required IES are received from access points.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

david pretham
Software Developer (Senior) Aricent
India India
No Biography provided

Comments and Discussions

 
QuestionHi Pinmemberlalo132221-Jul-14 17:08 
QuestionFormatting issue with the source code PinmemberMichael Haephrati25-Sep-12 9:25 
AnswerRe: Formatting issue with the source code Pinmemberdavid pretham25-Sep-12 19:47 
GeneralRe: Formatting issue with the source code PinmemberMember 109521065-Aug-14 22:57 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web03 | 2.8.140821.2 | Last Updated 28 Sep 2012
Article Copyright 2012 by david pretham
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid