private async Task <StunResult5389> FilteringBehaviorTestBaseAsync(CancellationToken token)
{
// test I
var result1 = await BindingTestBaseAsync(RemoteEndPoint, true, token);
try
{
if (result1.BindingTestResult != BindingTestResult.Success)
{
return(result1);
}
if (result1.OtherEndPoint == null ||
Equals(result1.OtherEndPoint.Address, RemoteEndPoint.Address) ||
result1.OtherEndPoint.Port == RemoteEndPoint.Port)
{
result1.FilteringBehavior = FilteringBehavior.UnsupportedServer;
return(result1);
}
// test II
var test2 = new StunMessage5389
{
StunMessageType = StunMessageType.BindingRequest,
Attributes = new[] { AttributeExtensions.BuildChangeRequest(true, true) }
};
var(response2, _, _) = await TestAsync(test2, RemoteEndPoint, result1.OtherEndPoint, token);
if (response2 != null)
{
result1.FilteringBehavior = FilteringBehavior.EndpointIndependent;
return(result1);
}
// test III
var test3 = new StunMessage5389
{
StunMessageType = StunMessageType.BindingRequest,
Attributes = new[] { AttributeExtensions.BuildChangeRequest(false, true) }
};
var(response3, remote3, _) = await TestAsync(test3, RemoteEndPoint, RemoteEndPoint, token);
if (response3 == null)
{
result1.FilteringBehavior = FilteringBehavior.AddressAndPortDependent;
return(result1);
}
if (Equals(remote3.Address, RemoteEndPoint.Address) && remote3.Port != RemoteEndPoint.Port)
{
result1.FilteringBehavior = FilteringBehavior.AddressAndPortDependent;
}
else
{
result1.FilteringBehavior = FilteringBehavior.UnsupportedServer;
}
return(result1);
}
finally
{
_filteringBehaviorSubj.OnNext(result1.FilteringBehavior);
}
}
