public override async Task OnConnectedAsync(ConnectionContext connection)
{
Logger.Debug($"Connecting to {_proxySettings.RemoteHost}:{_proxySettings.RemotePort}");
var proxyClient = new TcpClient();
await proxyClient.ConnectAsync(_proxySettings.RemoteHost, _proxySettings.RemotePort);
var ogStream = proxyClient.GetStream();
Stream proxyStream = ogStream;
if (_proxySettings.Secure)
{
var protocol = new TlsClientProtocol(proxyStream, new Org.BouncyCastle.Security.SecureRandom());
protocol.Connect(new BlazeTlsClient());
proxyStream = protocol.Stream;
}
var blazeProtocol = new BlazeProxyProtocol();
var localReader = connection.CreateReader();
var localWriter = connection.CreateWriter();
var remoteReader = new ProtocolReader(proxyStream);
var remoteWriter = new ProtocolWriter(proxyStream);
while (true)
{
try
{
var result = await localReader.ReadAsync(blazeProtocol);
var message = result.Message;
if (message != null)
{
var header = message.Header;
Logger.Debug(
$"Client -> Proxy; Length:{header.Length} Component:{header.Component} Command:0x{header.Command:X2} ErrorCode:{header.ErrorCode} MessageType:{header.MessageType} MessageId:{header.MessageId}");
var requestPayload = message.Payload;
if (!requestPayload.IsEmpty)
{
if (!_parser.TryParseBody(requestPayload))
{
Logger.Error("Failed to parse request message");
}
}
await remoteWriter.WriteAsync(blazeProtocol, message);
}
if (result.IsCompleted)
{
break;
}
}
finally
{
localReader.Advance();
}
do
{
try
{
var result = await remoteReader.ReadAsync(blazeProtocol);
var message = result.Message;
if (message != null)
{
var header = message.Header;
Logger.Debug(
$"Proxy <- Server; Length:{header.Length} Component:{header.Component} Command:0x{header.Command:X2} ErrorCode:{header.ErrorCode} MessageType:{header.MessageType} MessageId:{header.MessageId}");
var responsePayload = message.Payload;
if (!responsePayload.IsEmpty)
{
if (!_parser.TryParseBody(responsePayload))
{
Logger.Error("Failed to parse response message");
}
}
await localWriter.WriteAsync(blazeProtocol, message);
}
if (result.IsCompleted)
{
break;
}
}
finally
{
remoteReader.Advance();
}
} while (ogStream.DataAvailable);
}
}
public override async Task OnConnectedAsync(ConnectionContext connection)
{
Logger.Debug($"Redirecting to {_proxySettings.RedirectHost} {_proxySettings.RedirectIp}:{_proxySettings.LocalPort}");
var blazeProtocol = new BlazeProxyProtocol();
var localReader = connection.CreateReader();
var localWriter = connection.CreateWriter();
while (true)
{
try
{
var result = await localReader.ReadAsync(blazeProtocol);
var message = result.Message;
if (message != null)
{
if (message.Header.Component == BlazeComponent.Redirector &&
message.Header.Command == (ushort)RedirectorCommand.ServerInfo)
{
var hostBytes = new List <byte>(Encoding.ASCII.GetBytes(_proxySettings.RedirectHost));
var payload = new List <byte>();
payload.AddRange(new byte[] {
0x86, 0x49, 0x32, //ADDR
0xD0, 0x00, //union(0)
0xDA, 0x1B, 0x35, //VALU
0x00, //start struct
0xA2, 0xFC, 0xF4, //HOST
});
payload.AddRange(GetStringLengthBytes((uint)hostBytes.Count + 1));
payload.AddRange(hostBytes);
payload.AddRange(new byte[] {
0x00, //endbyte for string
0xA7, 0x00, 0x00, //IP
0x74, //uint32
});
var ipBytes = BitConverter.GetBytes(Convert.ToUInt32(IPAddress.Parse(_proxySettings.RedirectIp).Address));
Array.Reverse(ipBytes); //big endian
payload.AddRange(ipBytes);
payload.AddRange(new byte[] {
0xC2, 0xFC, 0xB4, //PORT
0x52, //uint16
});
var portBytes = BitConverter.GetBytes(Convert.ToUInt16(_proxySettings.LocalPort));
Array.Reverse(portBytes); //big endian
payload.AddRange(portBytes);
payload.AddRange(new byte[] {
0x00, //end struct
0xCE, 0x58, 0xF5, //SECU
0x21, //int8
0x00, //0
0xE2, 0x4B, 0xB3, //XDNS
0x74, //uint32
0x00, 0x00, 0x00, 0x00, //0
});
var response = new BlazeMessageData
{
Header = new BlazeHeader
{
Command = message.Header.Command,
Component = message.Header.Component,
MessageType = BlazeMessageType.Reply,
MessageId = message.Header.MessageId,
ErrorCode = 0
},
Payload = new ReadOnlySequence <byte>(payload.ToArray())
};
await localWriter.WriteAsync(blazeProtocol, response);
}
}
if (result.IsCompleted)
{
break;
}
}
finally
{
localReader.Advance();
}
}
}
