//---------- main
/**
* Runs the discoverer and shows a message dialog with the returned report.
* @param args args[0] - stun server address, args[1] - port. in the case of
* no args - defaults are provided.
* @throws java.lang.Exception if an exception occurrs during the discovery
* process.
*/
#if false
public static void main(String[] args)
{
StunAddress localAddr = null;
StunAddress serverAddr = null;
if (args.Length == 4)
{
localAddr = new StunAddress(args[2], Integer.valueOf(args[3]).intValue());
serverAddr = new StunAddress(args[0],
Integer.valueOf(args[1]).intValue());
}
else
{
localAddr = new StunAddress(InetAddress.getLocalHost(), 5678);
serverAddr = new StunAddress("stun01bak.sipphone.com.", 3479);
}
NetworkConfigurationDiscoveryProcess addressDiscovery =
new NetworkConfigurationDiscoveryProcess(localAddr, serverAddr);
addressDiscovery.start();
StunDiscoveryReport report = addressDiscovery.determineAddress();
System.oout.println(report);
// javax.swing.JOptionPane.showMessageDialog(
// null,
// report.toString(),
// "Stun Discovery Process",
// javax.swing.JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
/**
* Compares this object with obj. Two reports are considered equal if and
* only if both have the same nat type and their public addresses are
* equal or are both null.
* @param obj the object to compare against.
* @return true if the two objects are equal and false otherwise.
*/
public override bool Equals(Object obj)
{
if (obj == null ||
!(obj is StunDiscoveryReport))
{
return(false);
}
if (obj == this)
{
return(true);
}
StunDiscoveryReport target = (StunDiscoveryReport)obj;
return(target.GetNatType() == GetNatType() &&
(GetPublicAddress() == null && target.GetPublicAddress() == null ||
target.GetPublicAddress().Equals(GetPublicAddress())));
}
/**
* 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
*/
public virtual 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;
}
}
}
}
/**
* 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);
}
}
}
}
