Managed Wifi API

New Post: connection and documentation

kongae — Mon, 01 Sep 2008 05:35:43 GMT

How to connect to the unsecure wireless network, in coding.

and is there any documentation , where can i download it.

New Post: Disconnect??

wayne4 — Wed, 27 Aug 2008 20:39:55 GMT

First... Great API!!!!

I cannot find the WlanDisconnect() function. Was this left out or am I overlooking it?? Please point me in the direction of the disconnect function and a simple example of how to call it from C#.

Thanks for your help....
Wayne

New Post: How to get Signal Strenght

asifamjad — Fri, 01 Aug 2008 09:04:06 GMT

can u please help to get the singal strength of a wireless network??
please try to reply soon.. i need it urgent
thanks

New Post: Example?

masdegan — Tue, 22 Jul 2008 06:55:31 GMT

hi,

how to retrieve the SSIDs and RSSIs from available network using Wlan.WlanBssEntry.rssi?
I can do this using Wlan.WlanAvailableNetwork but the RSSIs are different compared to what I get using wifi scanner like wifisistr or net stumbler

thanks for any help

masdegan

New Post: How to get exact RSSI values in dBm?

masdegan — Mon, 21 Jul 2008 09:51:24 GMT

luren wrote:
After consulting Microsoft, problem is now solved by using approach 2 and after updating the driver of the wireless adapter (under Vista). Mine is an Intel Pro Wireless 3945ABG.

hi luren,

can you give me a sample code to use Wlan.WlanBssEntry.rssi?

thanks a lot before

New Post: Can I use it in Mobile Project?

michaelsync — Thu, 03 Jul 2008 01:51:15 GMT

Hi,

No. I'm looking for the library that I can use Windows Mobile 5 or 6, Nodia OS..

NEW POST: Can I use it in Mobile Project?

rkabhi — Tue, 03 Jun 2008 23:20:43 GMT

I have the same question too. Are you currently working on developing a library for Windows Mobile?

Thanks

NEW POST: Can I use it in Mobile Project?

michaelsync — Mon, 02 Jun 2008 07:33:13 GMT

Hello,

Can I use this library in C# Mobile Project?

CREATED ISSUE: Problem executing the example 17201

pphan — Thu, 08 May 2008 17:13:02 GMT

In wlanapi.cs , the execution halted at this (line 634).

Wlan.ThrowIfError(
Wlan.WlanOpenHandle(Wlan.WLAN_CLIENT_VERSION_XP_SP2, IntPtr.Zero, out negotiatedVersion, out clientHandle));

Thanks

NEW POST: Win32Exception

pphan — Thu, 08 May 2008 17:11:12 GMT

Me too, I have the same problem. The exception occured at:wlanapi.cs (line 634)

Wlan.ThrowIfError(
Wlan.WlanOpenHandle(Wlan.WLANCLIENTVERSIONXPSP2, IntPtr.Zero, out negotiatedVersion, out clientHandle));

NEW POST: How to get exact RSSI values in dBm?

luren — Thu, 08 May 2008 08:14:56 GMT

After consulting Microsoft, problem is now solved by using approach 2 and after updating the driver of the wireless adapter (under Vista). Mine is an Intel Pro Wireless 3945ABG.

NEW POST: How to get exact RSSI values in dBm?

luren — Mon, 05 May 2008 15:26:22 GMT

Hi!

I have tried to retrieve the exact RSSI values for each detected AP with two approaches:

1. retrieving Wlan.WlanAvailableNetwork.wlanSignalQuality or Wlan.WlanBssEntry.linkQuality and converting the percentage values into dBm based on http://msdn.microsoft.com/en-us/library/ms707403(VS.85).aspx. The results look OK but the problem is that they never go over -50. The values are also important to us if the signals are stronger than -50dBm...

2. retrieving Wlan.WlanBssEntry.rssi. According to the documentation (http://msdn.microsoft.com/en-us/library/ms706839(VS.85).aspx) it looks very nice, exactly what we needed. But the values are too low to be realistic. For instance, the RSSI value of an AP placed a few meters away from my laptop is -139... My question is how I should interpret these values? I couldn't see any correlation...

Could anyone help me? Thanks a lot in advance!

NEW POST: How to tell if incorrect password entered for?

danblanchard — Thu, 24 Apr 2008 17:52:31 GMT

Hi, thanks for the post, but I figured out a workaround, by checking the IP address of the network, if it was empty, then it was connecting, then if it can't connect it. Here is a code snippet...
using System.Net;
using System.Net.NetworkInformation;

WlanClient.WlanInterface wlanInterface = <get from somewhere>;

// get all network interfaces on computer
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
string ipAddresses = String.Empty;

// go through each network interface and find the one that matches this wireless interface
foreach (NetworkInterface adapter in nics)
{
if (String.Compare(adapter.Name, wlanInterface.InterfaceName, StringComparison.OrdinalIgnoreCase) == 0)
{
// go through all IPs addresses in this nic...
foreach (UnicastIPAddressInformation unicastIPAddress in adapter.GetIPProperties().UnicastAddresses)
{
string ipAddress = unicastIPAddress.Address.ToString();
// there are several non-identifiable ip addresses in adapter.GetIPProperties().DnsAddresses,
// so need to make a regex to get a real IP Address
if (System.Text.RegularExpressions.Regex.Match(ipAddress, @"(\d{1,3}\.){3}\d{1,3}").Success)
{
if (!String.IsNullOrEmpty(ipAddresses))
ipAddresses += ", ";
ipAddresses += ipAddress;
}
}
}
}
if (String.IsNullOrEmpty(ipAddresses))
ipAddresses = "Acquiring IP Address";

NEW POST: Win32Exception

Valistar — Wed, 16 Apr 2008 21:41:15 GMT

Hi everyone,

I try to execute the sample code but I got the following thrown exception :
System.ComponentModel.Win32Exception in the GetAvailableNetworkList function (line 277 of Wlanapi.cs).
I got to program an ad hoc network utility and I need it to work :s
Thanks in advance
Valistar.

CREATED ISSUE: how to use GetNetworkBssList function?

pigvip — Thu, 03 Apr 2008 15:32:55 GMT

I' am use GetNetworkBssList return error.

NEW POST: How to tell if incorrect password entered for?

ikonst — Fri, 28 Mar 2008 14:07:36 GMT

I doesn't seem to me like the API provides any orderly way of knowing about an incorrect key, probably because the underlying 802.11 protocol provides no such notification either. The "password" is called a key: if you choose the right key, your packets are accepted by the AP - otherwise, they're dropped. Similarly, if you choose the right key, you could decrypt the packets. Otherwise, you have no way of even knowing who those encrypted packets belong to.

I'm not saying this from being familiar with the protocol, but just from extrapolation on the way it behaves (e.g. you enter a wrong key in the GUI tools and you're not notified about it -- you simply have 0 received packets).

UPDATED WIKI: Home

ikonst — Fri, 28 Mar 2008 13:51:52 GMT

This project is a .NET class library allowing you to control Wifi (802.11) network adapters installed in your Windows machine programmatically.

The library uses the Native Wifi API, available since Windows Vista and Windows XP SP2 (in a limited fashion, and only after applying a hotfix provided in KB article 918997). Older versions of Windows are not supported.

You can find sample code in the WifiExample directory.

This code was developed as part of our work at Monfort Software Engineering.

Source code checked in

ikonst — Fri, 28 Mar 2008 13:48:32 GMT

Adding example code.

NEW POST: Retrieve MAC of all access points available

cbrotas — Thu, 31 Jan 2008 12:05:08 GMT

you welcome.

you right about vista, but that method work in windows XP professional with service pack 2 and KB918997 update, some time you need also msxml6.msi.

this and example to use native wifi and get all ap's info.

/// Wlan API client.
/// </summary>
private WlanClient wlanClient;
/// <summary>
/// Wireless interface.
/// </summary>
private WlanClient.WlanInterface wlanInterface;
/// <summary>
/// Wireless interface list.
/// </summary>
private WlanClient.WlanInterface[] wlanInterfaces;
/// <summary>
/// Available networks lists.
/// </summary>
private Wlan.WlanAvailableNetwork[] availableNets;
/// <summary>
/// Access Point list.
/// </summary>
private ArrayList aps;

/// <summary>
/// Search for available access points.
/// </summary>
public void scanAps()
{
if (wlanInterfaces.Length != 0)
{
wlanInterface.Scan();
availableNets = wlanInterface.GetAvailableNetworkList(
Wlan.WlanGetAvailableNetworkFlags.IncludeAllAdhocProfiles);

updateAPsList();
}
}

/// <summary>
/// Get access point recieved signal.
/// </summary>
/// <param name="index">AP index in array</param>
/// <returns>Recieved Signal</returns>
private int getApRS(int index)
{
return (int)availableNetsindex.wlanSignalQuality;
}

/// <summary>
/// Add new access points to array list, and update
/// recieved signal in old access points in the array.
/// </summary>
private void updateAPsList()
{
if (aps.Count == 0)
{
for (int i = 0; i < availableNets.Length; i++)
{
addAP(i);
}
}
else
{
foreach (AP ap in aps)
{
ap.RS = 0;
}
for (int i = 0; i < availableNets.Length; i++)
{
bool newAP = true;

foreach (AP ap in aps)
{
if (ap.SSID.Equals(getApSSID(i)))
{
updateAPRS(i);
newAP = false;
}
}
if (newAP)
{
addAP(i);
}
}
}

}

NEW POST: Retrieve MAC of all access points available

nsekkeli — Thu, 31 Jan 2008 07:19:34 GMT

First i want to thank with qucik replies. Yes i have a look on the native wifi library of windows but when i am trying to use public Wlan.WlanBssEntry[] GetNetworkBssList() method of this API, i get a "The request not supported" exception in the Wlan.WlanGetNetworkBssList row. In many forums it is declared that this action is supported for Windows vista platform?

First question is, am i using the right method to find Mac's of ap's? And the second is, using vista will resolve my problem?