private boolean test1Redo()
throws UtilityException, SocketException, UnknownHostException, IOException,
MessageAttributeParsingException, MessageHeaderParsingException {
int timeSinceFirstTransmission = 0;
int timeout = timeoutInitValue;
while (true) {
// redo test 1 with address and port as offered in the changed-address message attribute
try {
// Test 1 with changed port and address values
socketTest1.connect(ca.getAddress().getInetAddress(), ca.getPort());
socketTest1.setSoTimeout(timeout);
MessageHeader sendMH = new MessageHeader(MessageHeader.MessageHeaderType.BindingRequest);
sendMH.generateTransactionID();
ChangeRequest changeRequest = new ChangeRequest();
sendMH.addMessageAttribute(changeRequest);
byte[] data = sendMH.getBytes();
DatagramPacket send = new DatagramPacket(data, data.length);
socketTest1.send(send);
LOGGER.debug("Test 1 redo with changed address: Binding Request sent.");
MessageHeader receiveMH = new MessageHeader();
while (!(receiveMH.equalTransactionID(sendMH))) {
DatagramPacket receive = new DatagramPacket(new byte[200], 200);
socketTest1.receive(receive);
receiveMH = MessageHeader.parseHeader(receive.getData());
receiveMH.parseAttributes(receive.getData());
}
MappedAddress ma2 =
(MappedAddress)
receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.MappedAddress);
ErrorCode ec =
(ErrorCode)
receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.ErrorCode);
if (ec != null) {
di.setError(ec.getResponseCode(), ec.getReason());
LOGGER.debug("Message header contains an Errorcode message attribute.");
return false;
}
if (ma2 == null) {
di.setError(
700,
"The server is sending an incomplete response (Mapped Address message attribute is missing). The client should not retry.");
LOGGER.debug("Response does not contain a Mapped Address message attribute.");
return false;
} else {
if ((ma.getPort() != ma2.getPort())
|| (!(ma.getAddress().getInetAddress().equals(ma2.getAddress().getInetAddress())))) {
di.setSymmetric();
LOGGER.debug("Node is behind a symmetric NAT.");
return false;
}
}
return true;
} catch (SocketTimeoutException ste2) {
if (timeSinceFirstTransmission < timeoutTest) {
LOGGER.debug(
"Test 1 redo with changed address: Socket timeout while receiving the response.");
timeSinceFirstTransmission += timeout;
int timeoutAddValue = (timeSinceFirstTransmission * 2);
if (timeoutAddValue > timeoutSecond) // 1600)
timeoutAddValue = timeoutSecond;
timeout = timeoutAddValue;
} else {
LOGGER.debug(
"Test 1 redo with changed address: Socket timeout while receiving the response. Maximum retry limit exceed. Give up.");
return false;
}
}
}
}
private boolean test1()
throws UtilityException, SocketException, UnknownHostException, IOException,
MessageAttributeParsingException, MessageHeaderParsingException {
int timeSinceFirstTransmission = 0;
int timeout = timeoutInitValue;
while (true) {
try {
// Test 1 including response
socketTest1 = new DatagramSocket(new InetSocketAddress(localAddress, localPort));
socketTest1.setReuseAddress(true);
socketTest1.connect(InetAddress.getByName(stunServer), stunPort);
socketTest1.setSoTimeout(timeout);
LOGGER.debug("!!!!! SocketAddress: " + socketTest1.getLocalSocketAddress());
MessageHeader sendMH = new MessageHeader(MessageHeader.MessageHeaderType.BindingRequest);
sendMH.generateTransactionID();
ChangeRequest changeRequest = new ChangeRequest();
sendMH.addMessageAttribute(changeRequest);
byte[] data = sendMH.getBytes();
DatagramPacket send = new DatagramPacket(data, data.length);
socketTest1.send(send);
LOGGER.debug("Test 1: Binding Request sent.");
MessageHeader receiveMH = new MessageHeader();
while (!(receiveMH.equalTransactionID(sendMH))) {
DatagramPacket receive = new DatagramPacket(new byte[200], 200);
socketTest1.receive(receive);
receiveMH = MessageHeader.parseHeader(receive.getData());
receiveMH.parseAttributes(receive.getData());
}
ma =
(MappedAddress)
receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.MappedAddress);
ca =
(ChangedAddress)
receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.ChangedAddress);
ErrorCode ec =
(ErrorCode)
receiveMH.getMessageAttribute(MessageAttribute.MessageAttributeType.ErrorCode);
if (ec != null) {
di.setError(ec.getResponseCode(), ec.getReason());
LOGGER.debug("Message header contains an Errorcode message attribute.");
return false;
}
if ((ma == null) || (ca == null)) {
di.setError(
700,
"The server is sending an incomplete response (Mapped Address and Changed Address message attributes are missing). The client should not retry.");
LOGGER.debug(
"Response does not contain a Mapped Address or Changed Address message attribute.");
return false;
} else {
di.setPublicIP(ma.getAddress().getInetAddress());
di.setLocalPort(socketTest1.getLocalPort());
if ((ma.getPort() == socketTest1.getLocalPort())
&& (ma.getAddress().getInetAddress().equals(socketTest1.getLocalAddress()))) {
LOGGER.debug("Node is not natted.");
di.setPublicPort(socketTest1.getLocalPort());
nodeNatted = false;
} else {
di.setPublicPort(ma.getPort());
LOGGER.debug("Node is natted.");
}
return true;
}
} catch (SocketTimeoutException ste) {
if (timeSinceFirstTransmission < timeoutTest) {
LOGGER.debug("Test 1: Socket timeout while receiving the response.");
timeSinceFirstTransmission += timeout;
int timeoutAddValue = (timeSinceFirstTransmission * 2);
if (timeoutAddValue > timeoutSecond) // 1600)
timeoutAddValue = timeoutSecond;
timeout = timeoutAddValue;
} else {
// node is not capable of udp communication
LOGGER.debug(
"Test 1: Socket timeout while receiving the response. Maximum retry limit exceed. Give up.");
di.setBlockedUDP();
LOGGER.debug("Node is not capable of UDP communication.");
return false;
}
}
}
}