/// <summary>
/// 浏览器tcp转发
/// </summary>
/// <param name="client"></param>
private async Task TcpHandlerAsync(ConnectionContext browser)
{
try
{
//browser-->5,1,0
var firstPack = (await browser.Transport.Input.ReadAsync()).Buffer;
if (string.Join(",", firstPack.ToArray()) != "5,1,0")
{
throw new Exception("proxy handshake faild");
}
browser.Transport.Input.AdvanceTo(firstPack.GetPosition(firstPack.Length));
//server-->5,0
//发5 0 回到浏览器
await browser.Transport.Output.WriteAsync(new byte[] { 5, 0 });
//browser-->address port
var secondPack = (await browser.Transport.Input.ReadAsync()).Buffer;
if (!Socket5Utility.TryParse(secondPack.ToArray(), out var socket5Result))
{
throw new Exception("parse socket5 proxy infomation faild");
}
browser.Transport.Input.AdvanceTo(secondPack.GetPosition(secondPack.Length));
await using SocketConnect target = new SocketConnect();
await target.ConnectAsync(remoteAddress, remotePort, System.Text.Encoding.UTF8.GetString(socket5Result.Address), socket5Result.Port);
logger.LogInformation($"连接到{System.Text.Encoding.UTF8.GetString(socket5Result.Address)}:{socket5Result.Port}");
Task taskRecvBrowser = Task.Run(async() =>
{
//获取浏览器数据
await foreach (var browserData in GetRecvDataAsync(browser))
{
//发送数据到服务器
await target.SendAsync(browserData);
}
});
Task taskRecvServer = Task.Run(async() =>
{
//接收服务器数据
await foreach (var browserData in target.hubConnection.StreamAsync <byte[]>("GetTargetServerData"))
{
//发送数据到浏览器
await browser.Transport.Output.WriteAsync(browserData);
}
});
await Task.WhenAll(taskRecvBrowser, taskRecvServer);
}
catch (Exception ex)
{
logger.LogError(ex, $"处理TcpHandlerAsync出现错误：{ex.InnerException?.Message ?? ex.Message}");
}
}
/// <summary>
/// 处理浏览器
/// </summary>
/// <param name="browser"></param>
/// <returns></returns>
public static void ProcessBrowserAsync(ConnectionContext browser)
{
Task.Run(async() =>
{
//最终网站
SocketConnect target = new SocketConnect();
try
{
while (true)
{
System.IO.Pipelines.ReadResult result = await browser.Transport.Input.ReadAsync();
if (!result.Buffer.IsEmpty)
{
var message = Message.ParsePack(result.Buffer.ToArray());
if (message.Item1 != null)
{
var data = message.Item1.Content;
//var data = Crypto.DecryptAES(message.Item1.Content);
Socket5Info socket5Info = new Socket5Info();
if (socket5Info.TryParse(data))
{
await target.ConnectAsync(System.Text.Encoding.UTF8.GetString(socket5Info.Address), socket5Info.Port);
//连接到服务器
//var ipEndPoint = await GetIpEndPointAsync(System.Text.Encoding.UTF8.GetString(socket5Info.Address), socket5Info.Port);
//if(ipEndPoint == null)
//{
// break;
//}
//await target.ConnectAsync(ipEndPoint.Address,ipEndPoint.Port);
byte[] sendData = new byte[] { 0x05, 0x00, 0x00, 0x01, 0x7f, 0x00, 0x00, 0x01, 0x1f, 0x40 };
//发送确认到浏览器
await browser.Transport.Output.WriteAsync(sendData);
ProcessTargetServer(browser, target);
}
else
{
//发送数据到目标服务器
await target.TcpClient.Client.SendAsync(data, SocketFlags.None);
}
browser.Transport.Input.AdvanceTo(result.Buffer.GetPosition(message.Item2));
}
else
{
browser.Transport.Input.AdvanceTo(result.Buffer.GetPosition(0));
}
}
else
{
if (result.IsCompleted || result.IsCanceled)
{
break;
}
}
}
await browser.Transport.Input.CompleteAsync();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
});
}
// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
new Task(async() =>
{
//连接本地3389
await local3389.ConnectAsync("127.0.0.1", 3389);
await center.ConnectAsync("zwovo.xyz", 3390);
new Task(async() =>
{
while (true)
{
//收到本地中心服务器数据
var readResult = await center.PipeReader.ReadAsync();
if (readResult.Buffer.IsEmpty)
{
break;
}
SequencePosition position = readResult.Buffer.Start;
if (readResult.Buffer.TryGet(ref position, out var memory))
{
//发送到local3389
await center.SendAsync(memory);
local3389.PipeReader.AdvanceTo(readResult.Buffer.GetPosition(memory.Length));
}
if (readResult.IsCanceled || readResult.IsCompleted)
{
break;
}
}
await local3389.PipeReader.CompleteAsync();
}).Start();
while (true)
{
//收到本地3389数据
var readResult = await local3389.PipeReader.ReadAsync();
if (readResult.Buffer.IsEmpty)
{
break;
}
SequencePosition position = readResult.Buffer.Start;
if (readResult.Buffer.TryGet(ref position, out var memory))
{
//发送到中心服务器
await center.SendAsync(memory);
local3389.PipeReader.AdvanceTo(readResult.Buffer.GetPosition(memory.Length));
}
if (readResult.IsCanceled || readResult.IsCompleted)
{
break;
}
}
await local3389.PipeReader.CompleteAsync();
}).Start();
}