private async Task DiscoveryNatTypeImpl(CancellationToken token)
{
var server = new StunServer();
if (!server.Parse(_config.StunServer))
{
throw new Exception(@"Wrong STUN Server!");
}
using var proxy = ProxyFactory.CreateProxy(
_config.ProxyType,
Result5389.LocalEndPoint,
NetUtils.ParseEndpoint(_config.ProxyServer),
_config.ProxyUser, _config.ProxyPassword
);
using var client = new StunClient5389UDP(server.Hostname, server.Port, Result5389.LocalEndPoint, proxy);
Result5389 = client.Status;
await client.QueryAsync();
var cache = new StunResult5389();
cache.Clone(client.Status);
cache.LocalEndPoint = client.LocalEndPoint;
Result5389 = cache;
}
public RFC5780ViewModel()
{
Result5389 = new StunResult5389 {
LocalEndPoint = new IPEndPoint(IPAddress.Any, 0)
};
DiscoveryNatType = ReactiveCommand.CreateFromTask(DiscoveryNatTypeImpl);
}
public RFC5780ViewModel(IScreen hostScreen, Config config)
{
HostScreen = hostScreen;
_config = config;
Result5389 = new StunResult5389 {
LocalEndPoint = new IPEndPoint(IPAddress.Any, 0)
};
DiscoveryNatType = ReactiveCommand.CreateFromTask(DiscoveryNatTypeImpl);
}
private static string GetSimpleResult(StunResult5389 res)
{
switch (res.BindingTestResult, res.MappingBehavior, res.FilteringBehavior)
{
public async Task <StunResult5389> QueryAsync()
{
var result = new StunResult5389();
try
{
_bindingSubj.OnNext(result.BindingTestResult);
_mappingBehaviorSubj.OnNext(result.MappingBehavior);
_filteringBehaviorSubj.OnNext(result.FilteringBehavior);
PubSubj.OnNext(result.PublicEndPoint);
using var cts = new CancellationTokenSource(Timeout);
await Proxy.ConnectAsync(cts.Token);
result = await FilteringBehaviorTestBaseAsync(cts.Token);
if (result.BindingTestResult != BindingTestResult.Success ||
result.FilteringBehavior == FilteringBehavior.UnsupportedServer
)
{
return(result);
}
if (Equals(result.PublicEndPoint, result.LocalEndPoint))
{
result.MappingBehavior = MappingBehavior.Direct;
return(result);
}
// MappingBehaviorTest test II
var result2 = await BindingTestBaseAsync(new IPEndPoint(result.OtherEndPoint.Address, RemoteEndPoint.Port), false, cts.Token);
if (result2.BindingTestResult != BindingTestResult.Success)
{
result.MappingBehavior = MappingBehavior.Fail;
return(result);
}
if (Equals(result2.PublicEndPoint, result.PublicEndPoint))
{
result.MappingBehavior = MappingBehavior.EndpointIndependent;
return(result);
}
// MappingBehaviorTest test III
var result3 = await BindingTestBaseAsync(result.OtherEndPoint, false, cts.Token);
if (result3.BindingTestResult != BindingTestResult.Success)
{
result.MappingBehavior = MappingBehavior.Fail;
return(result);
}
result.MappingBehavior = Equals(result3.PublicEndPoint, result2.PublicEndPoint) ? MappingBehavior.AddressDependent : MappingBehavior.AddressAndPortDependent;
return(result);
}
finally
{
_mappingBehaviorSubj.OnNext(result.MappingBehavior);
await Proxy.DisconnectAsync();
}
}
public async Task <StunResult5389> MappingBehaviorTestAsync()
{
var result = new StunResult5389();
try
{
await Proxy.ConnectAsync();
// test I
result = await BindingTestBaseAsync(RemoteEndPoint, true);
if (result.BindingTestResult != BindingTestResult.Success)
{
return(result);
}
if (result.OtherEndPoint == null ||
Equals(result.OtherEndPoint.Address, RemoteEndPoint.Address) ||
result.OtherEndPoint.Port == RemoteEndPoint.Port)
{
result.MappingBehavior = MappingBehavior.UnsupportedServer;
return(result);
}
if (Equals(result.PublicEndPoint, result.LocalEndPoint))
{
result.MappingBehavior = MappingBehavior.Direct;
return(result);
}
// test II
var result2 = await BindingTestBaseAsync(new IPEndPoint(result.OtherEndPoint.Address, RemoteEndPoint.Port), false);
if (result2.BindingTestResult != BindingTestResult.Success)
{
result.MappingBehavior = MappingBehavior.Fail;
return(result);
}
if (Equals(result2.PublicEndPoint, result.PublicEndPoint))
{
result.MappingBehavior = MappingBehavior.EndpointIndependent;
return(result);
}
// test III
var result3 = await BindingTestBaseAsync(result.OtherEndPoint, false);
if (result3.BindingTestResult != BindingTestResult.Success)
{
result.MappingBehavior = MappingBehavior.Fail;
return(result);
}
result.MappingBehavior = Equals(result3.PublicEndPoint, result2.PublicEndPoint) ? MappingBehavior.AddressDependent : MappingBehavior.AddressAndPortDependent;
return(result);
}
finally
{
_mappingBehaviorSubj.OnNext(result.MappingBehavior);
await Proxy.DisconnectAsync();
}
}
