/**
* Returns a String representation of the object.
* @return a String representation of the object.
*/
public override string ToString()
{
return("net.java.stun4j.stack.AccessPoint@"
+ apDescriptor.GetAddress()
+ " status: "
+ (isRunning? "not":"")
+ " running");
}
/**
* Implements the discovery process itself (see class description).
* @return a StunDiscoveryReport containing details about the network
* configuration of the host where the class is executed.
* @throws StunException ILLEGAL_STATE if the discoverer has not been started
* NETWORK_ERROR or ILLEGAL_ARGUMENT if a failure occurs while executing
* the discovery algorithm
*/
virtual public StunDiscoveryReport determineAddress()
{
checkStarted();
StunDiscoveryReport report = new StunDiscoveryReport();
StunMessageEvent evt = doTestI(serverAddress);
if (evt == null)
{
//UDP Blocked
report.SetNatType(StunDiscoveryReport.UDP_BLOCKING_FIREWALL);
return(report);
}
else
{
StunAddress mappedAddress = ((MappedAddressAttribute)evt.GetMessage().
GetAttribute(Attribute.MAPPED_ADDRESS)).GetAddress();
StunAddress backupServerAddress = ((ChangedAddressAttribute)evt.GetMessage().
GetAttribute(Attribute.CHANGED_ADDRESS)).GetAddress();
report.SetPublicAddress(mappedAddress);
if (mappedAddress.Equals(apDescriptor.GetAddress()))
{
evt = doTestII(serverAddress);
if (evt == null)
{
//Sym UDP Firewall
report.SetNatType(StunDiscoveryReport.SYMMETRIC_UDP_FIREWALL);
return(report);
}
else
{
//open internet
report.SetNatType(StunDiscoveryReport.OPEN_INTERNET);
return(report);
}
}
else
{
evt = doTestII(serverAddress);
if (evt == null)
{
evt = doTestI(backupServerAddress);
if (evt == null)
{
// System.oout.println("Failed to receive a response from backup stun server!");
return(report);
}
StunAddress mappedAddress2 = ((MappedAddressAttribute)evt.GetMessage().
GetAttribute(Attribute.MAPPED_ADDRESS)).GetAddress();
if (mappedAddress.Equals(mappedAddress2))
{
evt = doTestIII(serverAddress);
if (evt == null)
{
//port restricted cone
report.SetNatType(StunDiscoveryReport.PORT_RESTRICTED_CONE_NAT);
return(report);
}
else
{
//restricted cone
report.SetNatType(StunDiscoveryReport.RESTRICTED_CONE_NAT);
return(report);
}
}
else
{
//Symmetric NAT
report.SetNatType(StunDiscoveryReport.SYMMETRIC_NAT);
return(report);
}
}
else
{
//full cone
report.SetNatType(StunDiscoveryReport.FULL_CONE_NAT);
return(report);
}
}
}
}