/// <summary>
/// This function fetches the ssid of wlan connection for the system
/// </summary>
/// <returns>A wlaninfo object which contains SSID and security info</returns>
private WlanInfo GetWirelessConnection()
{
WlanInfo wifiInfo = new WlanInfo();
IntPtr handle = IntPtr.Zero;
uint negotiatedVersion;
try
{
if (NativeMethods.WlanOpenHandle(1, IntPtr.Zero, out negotiatedVersion, out handle) != 0)
{
return(null);
}
IntPtr ptr = new IntPtr();
if (NativeMethods.WlanEnumInterfaces(handle, IntPtr.Zero, ref ptr) != 0)
{
return(null);
}
Structs.WlanInterfaceInfoList infoList = new Structs.WlanInterfaceInfoList(ptr);
NativeMethods.WlanFreeMemory(ptr);
Guid guid;
uint dataSize;
Structs.WlanConnectionAttributes connection;
// Call wlanqueryinterface for all the interfaces in the list
for (int i = 0; i < infoList.dwNumberOfItems; i++)
{
guid = infoList.InterfaceInfo[i].InterfaceGuid;
if (NativeMethods.WlanQueryInterface(handle, ref guid, Wlan.Core.Enums.WlanIntfOpcode.wlan_intf_opcode_current_connection, IntPtr.Zero, out dataSize, ref ptr, IntPtr.Zero) != 0)
{
return(null);
}
connection = (Structs.WlanConnectionAttributes)Marshal.PtrToStructure(ptr, typeof(Structs.WlanConnectionAttributes));
byte[] arr = connection.wlanAssociationAttributes.dot11Ssid.ucSSID;
string ssid = Encoding.UTF8.GetString(arr);
wifiInfo.SSID = ssid.Trim('\0');
wifiInfo.IsSecured = connection.wlanSecurityAttributes.bSecurityEnabled;
NativeMethods.WlanFreeMemory(ptr);
}
return(wifiInfo);
}
#pragma warning disable CA1031 // pinvokes might throw runtime exception
catch (Exception)
#pragma warning restore CA1031
{
return(null);
}
finally
{
if (handle != IntPtr.Zero)
{
uint returncode = NativeMethods.WlanCloseHandle(handle, IntPtr.Zero);
}
}
}
public WlanInfo GetWlanInfo(WlanType type)
{
var urn = $"urn:dslforum-org:service:WLANConfiguration:{(int)type}";
var action = "GetInfo";
var xml = GetRequestXml(action, urn);
var response = RequestWithAuthentication(action, urn, xml);
var node = response.GetElementsByTagName("u:GetInfoResponse")[0];
var se = new WlanInfo(node);
return(se);
}
