public static async Task <NatTypeTestResult> DiscoveryNatTypeAsync(Socks5Server socks5, CancellationToken ctx = default)
{
var stunServer = Global.Settings.STUN_Server;
var port = (ushort)Global.Settings.STUN_Server_Port;
var local = new IPEndPoint(IPAddress.Any, 0);
var socks5Option = new Socks5CreateOption
{
Address = await DnsUtils.LookupAsync(socks5.Hostname),
Port = socks5.Port,
UsernamePassword = new UsernamePassword
{
UserName = socks5.Username,
Password = socks5.Password
}
};
var ip = await DnsUtils.LookupAsync(stunServer);
if (ip == null)
{
return(new NatTypeTestResult {
Result = "Wrong STUN Server!"
});
}
using IUdpProxy proxy = ProxyFactory.CreateProxy(ProxyType.Socks5, new IPEndPoint(IPAddress.Loopback, 0), socks5Option);
using var client = new StunClient5389UDP(new IPEndPoint(ip, port), local, proxy);
await client.ConnectProxyAsync(ctx);
try
{
await client.QueryAsync(ctx);
}
finally
{
await client.CloseProxyAsync(ctx);
}
var res = client.State;
var result = GetSimpleResult(res);
return(new NatTypeTestResult
{
Result = result,
LocalEnd = res.LocalEndPoint?.ToString(),
PublicEnd = res.PublicEndPoint?.ToString()
});
}
/// <summary>
/// 测试延迟
/// </summary>
/// <returns>延迟</returns>
public async Task <int> PingAsync()
{
try
{
var destination = await DnsUtils.LookupAsync(Hostname);
if (destination == null)
{
return(Delay = -2);
}
var list = new Task <int> [3];
for (var i = 0; i < 3; i++)
{
async Task <int> PingCoreAsync()
{
try
{
return(Global.Settings.ServerTCPing
? await Utils.Utils.TCPingAsync(destination, Port)
: await Utils.Utils.ICMPingAsync(destination));
}
catch (Exception)
{
return(-4);
}
}
list[i] = PingCoreAsync();
}
var resTask = await Task.WhenAny(list[0], list[1], list[2]);
return(Delay = await resTask);
}
catch (Exception)
{
return(Delay = -4);
}
}
public static async Task <string> AutoResolveHostnameAsync(this Server server, AddressFamily inet = AddressFamily.Unspecified)
{
// ! MainController cached
return((await DnsUtils.LookupAsync(server.Hostname, inet)) !.ToString());
}
public static async Task <string> AutoResolveHostnameAsync(this Server server, AddressFamily inet = AddressFamily.Unspecified)
{
return(Global.Settings.ResolveServerHostname ? (await DnsUtils.LookupAsync(server.Hostname, inet)) !.ToString() : server.Hostname);
}