protected override async ValueTask <ConnectState> ConnectProxyAsync(EndPoint remoteEndPoint, ConnectState state, CancellationToken cancellationToken)
{
var encoding = Encoding.ASCII;
var request = string.Empty;
var channel = state.CreateChannel <TextPackageInfo>(new LinePipelineFilter(encoding), new ChannelOptions {
ReadAsDemand = true
});
if (remoteEndPoint is DnsEndPoint dnsEndPoint)
{
request = string.Format(_requestTemplate, dnsEndPoint.Host, dnsEndPoint.Port);
}
else if (remoteEndPoint is IPEndPoint ipEndPoint)
{
request = string.Format(_requestTemplate, ipEndPoint.Address, ipEndPoint.Port);
}
else
{
return(new ConnectState
{
Result = false,
Exception = new Exception($"The endpint type {remoteEndPoint.GetType().ToString()} is not supported.")
});
}
// send request
await channel.SendAsync((writer) =>
{
writer.Write(request, encoding);
if (!string.IsNullOrEmpty(_username) || !string.IsNullOrEmpty(_password))
{
writer.Write("Proxy-Authorization: Basic ", encoding);
writer.Write(Convert.ToBase64String(encoding.GetBytes($"{_username}:{_password}")), encoding);
writer.Write("\r\n\r\n", encoding);
}
else
{
writer.Write("\r\n", encoding);
}
});
var packStream = channel.GetPackageStream();
var p = await packStream.ReceiveAsync();
if (!HandleResponse(p, out string errorMessage))
{
await channel.CloseAsync();
return(new ConnectState
{
Result = false,
Exception = new Exception(errorMessage)
});
}
await channel.DetachAsync();
return(state);
}
protected override async ValueTask <ConnectState> ConnectProxyAsync(EndPoint remoteEndPoint, ConnectState state, CancellationToken cancellationToken)
{
var channel = state.CreateChannel <Socks5Pack>(new Socks5AuthPipelineFilter(), new ChannelOptions {
ReadAsDemand = true
});
var packStream = channel.GetPackageStream();
await channel.SendAsync(_authenHandshakeRequest);
var response = await packStream.ReceiveAsync();
if (!HandleResponse(response, Socket5ResponseType.Handshake, out string errorMessage))
{
await channel.CloseAsync();
return(new ConnectState
{
Result = false,
Exception = new Exception(errorMessage)
});
}
if (response.Status == 0x02)// need pass auth
{
var passAuthenRequest = GetPassAuthenBytes();
await channel.SendAsync(passAuthenRequest);
response = await packStream.ReceiveAsync();
if (!HandleResponse(response, Socket5ResponseType.AuthUserName, out errorMessage))
{
await channel.CloseAsync();
return(new ConnectState
{
Result = false,
Exception = new Exception(errorMessage)
});
}
}
var endPointRequest = GetEndPointBytes(remoteEndPoint);
await channel.SendAsync(endPointRequest);
response = await packStream.ReceiveAsync();
if (!HandleResponse(response, Socket5ResponseType.AuthEndPoint, out errorMessage))
{
await channel.CloseAsync();
return(new ConnectState
{
Result = false,
Exception = new Exception(errorMessage)
});
}
await channel.DetachAsync();
return(state);
}