Skip to content

Instantly share code, notes, and snippets.

@lmcarreiro
Created February 21, 2019 16:41
Show Gist options
  • Save lmcarreiro/cb67f6695b1ed78a9ce281bdcb51b4bc to your computer and use it in GitHub Desktop.
Save lmcarreiro/cb67f6695b1ed78a9ce281bdcb51b4bc to your computer and use it in GitHub Desktop.
Get list of Access Point (BSSID and Signal) using C#
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace ConsoleApp2
{
class AccessPoint
{
public string SSID { get; set; }
public string BSSID { get; set; }
public byte Signal { get; set; }
}
class Program
{
private static async Task Main(string[] args)
{
var apList = await GetSignalOfNetworks();
foreach (var ap in apList)
{
WriteLine($"{ap.BSSID} - {ap.Signal} - {ap.SSID}");
}
Console.ReadKey();
}
private static async Task<AccessPoint[]> GetSignalOfNetworks()
{
string result = await ExecuteProcessAsync(@"C:\Windows\System32\netsh.exe", "wlan show networks mode=bssid");
return Regex.Split(result, @"[^B]SSID \d+").Skip(1).SelectMany(network => GetAccessPointFromNetwork(network)).ToArray();
}
private static AccessPoint[] GetAccessPointFromNetwork(string network)
{
string withoutLineBreaks = Regex.Replace(network, @"[\r\n]+", " ").Trim();
string ssid = Regex.Replace(withoutLineBreaks, @"^:\s+(\S+).*$", "$1").Trim();
return Regex.Split(withoutLineBreaks, @"\s{4}BSSID \d+").Skip(1).Select(ap => GetAccessPoint(ssid, ap)).ToArray();
}
private static AccessPoint GetAccessPoint(string ssid, string ap)
{
string withoutLineBreaks = Regex.Replace(ap, @"[\r\n]+", " ").Trim();
string bssid = Regex.Replace(withoutLineBreaks, @"^:\s+([a-f0-9]{2}(:[a-f0-9]{2}){5}).*$", "$1").Trim();
byte signal = byte.Parse(Regex.Replace(withoutLineBreaks, @"^.*(Signal|Sinal)\s+:\s+(\d+)%.*$", "$2").Trim());
return new AccessPoint
{
SSID = ssid,
BSSID = bssid,
Signal = signal,
};
}
private static async Task<string> ExecuteProcessAsync(string cmd, string args = null)
{
var process = new Process()
{
StartInfo = new ProcessStartInfo
{
FileName = cmd,
Arguments = args,
RedirectStandardInput = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
UseShellExecute = false,
CreateNoWindow = true,
StandardOutputEncoding = Encoding.UTF8,
}
};
process.Start();
string result = await process.StandardOutput.ReadToEndAsync();
process.WaitForExit();
#if DEBUG
if (result.Trim().Contains("The Wireless AutoConfig Service (wlansvc) is not running."))
{
return await GetFakeData();
}
#endif
return result;
}
private static async Task<string> GetFakeData()
{
var assembly = Assembly.GetExecutingAssembly();
var resourceName = "ConsoleApp2.FakeData.txt";
using (Stream stream = assembly.GetManifestResourceStream(resourceName))
using (StreamReader reader = new StreamReader(stream))
{
return await reader.ReadToEndAsync();
}
}
private static void WriteLine(string str)
{
Console.WriteLine(str);
}
}
}
@Sedighzade
Copy link

Why you have included 'mode=bssid'? I don't think it is necessary. Am I missing sth here?

BTW, Great work. Thanks.

@lmcarreiro
Copy link
Author

I didn't even remember this code... LOL

I think it's because I was using it on the building of the company I used to work, there we had many AP with the same SSID, and I needed to identify each one individually.

@FrancisChung
Copy link

Genius. The only Wi-Fi solution I could find that works reasonably well.
I've tried going to the UWP, Windows SDK route but it didn't work well at all.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment