/**
* Compares two STUN Attributes. Attributeas are considered equal when their
* type, length, and all data are the same.
*
* @param obj the object to compare this attribute with.
* @return true if the attributes are equal and false otherwise.
*/
public override bool Equals(Object obj)
{
if (!(obj is AddressAttribute) ||
obj == null)
{
return(false);
}
if (obj == this)
{
return(true);
}
AddressAttribute att = (AddressAttribute)obj;
if (att.GetAttributeType() != GetAttributeType() ||
att.GetDataLength() != GetDataLength()
//compare data
|| att.GetFamily() != GetFamily() ||
(att.GetAddress() != null &&
!address.Equals(att.GetAddress()))
)
{
return(false);
}
//addresses
if (att.GetAddress() == null && GetAddress() == null)
{
return(true);
}
return(true);
}
/**
* Compares this object against the specified object. The result is true if
* and only if the argument is not null and it represents the same address
* as this object.
*
* Two instances of InetSocketAddress represent the same address if both the
* InetAddresses (or hostnames if it is unresolved) and port numbers are
* equal. If both addresses are unresolved, then the hostname & the port
* number are compared.
*
* @param obj the object to compare against.
* @return true if the objects are the same; false otherwise.
*/
public override bool Equals(object obj)
{
if (obj == null ||
!(obj is NetAccessPointDescriptor))
{
return(false);
}
if (obj == this)
{
return(true);
}
return(stunAddr.Equals(((NetAccessPointDescriptor)obj).stunAddr));
}
/**
* 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);
}
}
}
}