static async System.Threading.Tasks.Task Main(string[] args)
{
if (args.Length != 2)
{
Utility.WriteLine("Usage: {0} <server address> <server listen port>", "dotnet run");
return;
}
if (!System.Net.IPAddress.TryParse(args[0], out var serverAddress))
{
Utility.WriteLine("Could not convert argument to IP address: {0}", args[0]);
return;
}
if (!int.TryParse(args[1], out var serverPort) || serverPort < 1 || serverPort > 65535)
{
Utility.WriteLine("Could not convert argument to network port: {0}", args[1]);
return;
}
if (!RawOutput)
{
Utility.WriteLine("Connecting to server");
}
System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
try
{
client.Connect(serverAddress, serverPort);
}
catch (Exception ex)
{
Utility.WriteLine("Error connecting to server: " + ex.ToString());
return;
}
if (!RawOutput)
{
Utility.WriteLine("Reading from server and dumping traffic to console");
}
var stream = client.GetStream();
byte[] lenBuffer = new byte[4];
int length;
byte[] frameBuffer = new byte[PacketBufferSize];
int offset;
byte[] dec;
try
{
for (; client.Connected;)
{
offset = 0;
while (offset < 4)
{
offset = await stream.ReadAsync(lenBuffer, offset, 4 - offset);
if (offset < 1)
{
throw new System.IO.EndOfStreamException("Short read of length buffer");
}
}
length = BitConverter.ToInt32(lenBuffer, 0);
if (!RawOutput)
{
Utility.DebugWriteLine("Got frame length: " + length);
}
offset = 0;
while (offset < length)
{
offset = await stream.ReadAsync(frameBuffer, offset, length - offset);
if (offset < 1)
{
throw new System.IO.EndOfStreamException("Short read of frame buffer");
}
}
using (var msC = new System.IO.MemoryStream(frameBuffer, 0, length))
{
using (var zstd = new Zstandard.Net.ZstandardStream(msC, System.IO.Compression.CompressionMode.Decompress))
{
using (var msD = new System.IO.MemoryStream())
{
zstd.CopyTo(msD);
dec = msD.ToArray();
}
}
}
if (!RawOutput)
{
System.Text.StringBuilder debugOut = new System.Text.StringBuilder();
debugOut.Append("Decompressed frame (");
debugOut.Append(dec.Length);
debugOut.Append("): ");
foreach (var b in dec)
{
debugOut.Append(b.ToString("X2"));
}
Utility.DebugWriteLine(debugOut.ToString());
}
else
{
System.Text.StringBuilder debugOut = new System.Text.StringBuilder();
foreach (var b in dec)
{
debugOut.Append(b.ToString("X2"));
}
Utility.DebugWriteLine(debugOut.ToString());
}
}
}
catch (Exception ex)
{
Utility.WriteLine("Got exception reading data: " + ex.ToString());
return;
}
}
static async System.Threading.Tasks.Task Main(string[] args)
{
if (args.Length != 2)
{
Utility.WriteLine("Usage: {0} <server address> <server listen port>", "dotnet run");
return;
}
if (!System.Net.IPAddress.TryParse(args[0], out var serverAddress))
{
Utility.WriteLine("Could not convert argument to IP address: {0}", args[0]);
return;
}
if (!int.TryParse(args[1], out var serverPort) || serverPort < 1 || serverPort > 65535)
{
Utility.WriteLine("Could not convert argument to network port: {0}", args[1]);
return;
}
Utility.WriteLine("Connecting to server");
System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
try
{
client.Connect(serverAddress, serverPort);
}
catch (Exception ex)
{
Utility.WriteLine("Error connecting to server: " + ex.ToString());
return;
}
Utility.WriteLine("Generating beacons and sending to server");
var stream = client.GetStream();
var toSend = new byte[5000];
try
{
var crc = new Crc32();
for (; client.Connected;)
{
//System.Threading.Thread.Sleep(500);
byte[] b = new byte[Utility.TestBeacon.Length];
using (var msC = new System.IO.MemoryStream())
{
using (var zstd = new Zstandard.Net.ZstandardStream(msC, System.IO.Compression.CompressionMode.Compress))
{
zstd.CompressionLevel = 1;
Array.Copy(Utility.TestBeacon, b, b.Length);
byte[] mac = new byte[3];
Utility.RandomNumberGenerator.GetBytes(mac);
Array.Copy(mac, 0, b, 49, 3);
Array.Copy(mac, 0, b, 54, 3);
string s1 = mac[0].ToString("X2");
string s2 = mac[1].ToString("X2");
string s3 = mac[2].ToString("X2");
var s1b = System.Text.ASCIIEncoding.ASCII.GetBytes(s1);
var s2b = System.Text.ASCIIEncoding.ASCII.GetBytes(s2);
var s3b = System.Text.ASCIIEncoding.ASCII.GetBytes(s3);
b[85] = s1b[0];
b[86] = s1b[1];
b[87] = s2b[0];
b[88] = s2b[1];
b[89] = s3b[0];
b[90] = s3b[1];
byte[] getCRC = new byte[b.Length - 40];
Array.Copy(b, 36, getCRC, 0, getCRC.Length);
var crc32Calc = crc.Get <byte>(getCRC);
b[b.Length - 4] = (byte)(crc32Calc & 0xFF);
b[b.Length - 3] = (byte)((crc32Calc & 0xFF00) >> 8);
b[b.Length - 2] = (byte)((crc32Calc & 0xFF0000) >> 16);
b[b.Length - 1] = (byte)((crc32Calc & 0xFF000000) >> 24);
zstd.Write(b, 0, b.Length);
zstd.Close();
toSend = msC.ToArray();
}
}
byte[] lenBuffer = BitConverter.GetBytes(toSend.Length);
await stream.WriteAsync(lenBuffer);
await stream.WriteAsync(toSend);
}
}
catch (Exception ex)
{
Utility.WriteLine("Got exception sending beacon: " + ex.ToString());
return;
}
}
