@Override
public <T extends LwM2mResponse> T send(final UplinkRequest<T> request, Long timeout) {
// Create the CoAP request from LwM2m request
final CoapClientRequestBuilder coapClientRequestBuilder =
new CoapClientRequestBuilder(serverAddress, client);
request.accept(coapClientRequestBuilder);
// TODO manage invalid parameters
// if (!coapClientRequestBuilder.areParametersValid()) {
// return OperationResponse.failure(ResponseCode.INTERNAL_SERVER_ERROR,
// "Request has invalid parameters. Not sending.");
// }
final Request coapRequest = coapClientRequestBuilder.getRequest();
// Send CoAP request synchronously
final SyncRequestObserver<T> syncMessageObserver =
new SyncRequestObserver<T>(coapRequest, timeout) {
@Override
public T buildResponse(final Response coapResponse) {
// Build LwM2m response
final LwM2mClientResponseBuilder<T> lwm2mResponseBuilder =
new LwM2mClientResponseBuilder<T>(coapRequest, coapResponse);
request.accept(lwm2mResponseBuilder);
return lwm2mResponseBuilder.getResponse();
}
};
coapRequest.addMessageObserver(syncMessageObserver);
// Send CoAP request asynchronously
clientEndpoint.sendRequest(coapRequest);
// Wait for response, then return it
return syncMessageObserver.waitForResponse();
}
@Override
public <T extends LwM2mResponse> void send(
final UplinkRequest<T> request,
final ResponseCallback<T> responseCallback,
final ErrorCallback errorCallback) {
// Create the CoAP request from LwM2m request
final CoapClientRequestBuilder coapClientRequestBuilder =
new CoapClientRequestBuilder(serverAddress, client);
request.accept(coapClientRequestBuilder);
// TODO manage invalid parameters
// if (!coapClientRequestBuilder.areParametersValid()) {
// responseCallback.onFailure(OperationResponse.failure(ResponseCode.INTERNAL_SERVER_ERROR,
// "Request has invalid parameters. Not sending."));
// return;
// }
final Request coapRequest = coapClientRequestBuilder.getRequest();
// Add CoAP request callback
coapRequest.addMessageObserver(
new AsyncRequestObserver<T>(coapRequest, responseCallback, errorCallback) {
@Override
public T buildResponse(final Response coapResponse) {
// Build LwM2m response
final LwM2mClientResponseBuilder<T> lwm2mResponseBuilder =
new LwM2mClientResponseBuilder<T>(coapRequest, coapResponse);
request.accept(lwm2mResponseBuilder);
return lwm2mResponseBuilder.getResponse();
}
});
// Send CoAP request asynchronously
clientEndpoint.sendRequest(coapRequest);
}
public void updateStatistics(Request request, boolean cachedResponse) {
URI proxyUri = null;
try {
proxyUri = new URI(request.getOptions().getProxyURI());
} catch (URISyntaxException e) {
LOGGER.warning(String.format("Proxy-uri malformed: %s", request.getOptions().getProxyURI()));
}
if (proxyUri == null) {
// throw new IllegalArgumentException("proxyUri == null");
return;
}
// manage the address requester
String addressString = proxyUri.getHost();
if (addressString != null) {
// manage the resource requested
String resourceString = proxyUri.getPath();
if (resourceString != null) {
// check if there is already an entry for the row/column
// association
StatHelper statHelper = statsTable.get(addressString, resourceString);
if (statHelper == null) {
// create a new stat if it not present
statHelper = new StatHelper();
// add the new element to the table
statsTable.put(addressString, resourceString, statHelper);
}
// increment the count of the requests
statHelper.increment(cachedResponse);
}
}
}
public CO06(String serverURI) {
super(CO06.class.getSimpleName());
// create the request
Request request = new Request(Code.GET, Type.CON);
// set Observe option
request.setObserve();
// set the parameters and execute the request
executeRequest(request, serverURI, RESOURCE_URI);
}
/**
* When we receive a duplicate of a request, we stop it here and do not forward it to the upper
* layer. If the server has already sent a response, we send it again. If the request has only
* been acknowledged (but the ACK has gone lost or not reached the client yet), we resent the ACK.
* If the request has neither been responded, acknowledged or rejected yet, the server has not yet
* decided what to do with the request and we cannot do anything.
*/
@Override
public void receiveRequest(Exchange exchange, Request request) {
if (request.isDuplicate()) {
// Request is a duplicate, so resend ACK, RST or response
if (exchange.getCurrentResponse() != null) {
LOGGER.fine("Respond with the current response to the duplicate request");
// Do not restart retransmission cycle
super.sendResponse(exchange, exchange.getCurrentResponse());
} else if (exchange.getCurrentRequest().isAcknowledged()) {
LOGGER.fine(
"The duplicate request was acknowledged but no response computed yet. Retransmit ACK");
EmptyMessage ack = EmptyMessage.newACK(request);
sendEmptyMessage(exchange, ack);
} else if (exchange.getCurrentRequest().isRejected()) {
LOGGER.fine("The duplicate request was rejected. Reject again");
EmptyMessage rst = EmptyMessage.newRST(request);
sendEmptyMessage(exchange, rst);
} else {
LOGGER.fine(
"The server has not yet decided what to do with the request. We ignore the duplicate.");
// The server has not yet decided, whether to acknowledge or
// reject the request. We know for sure that the server has
// received the request though and can drop this duplicate here.
}
} else {
// Request is not a duplicate
exchange.setCurrentRequest(request);
super.receiveRequest(exchange, request);
}
}
/** Schedules a retransmission for confirmable messages. */
@Override
public void sendRequest(final Exchange exchange, final Request request) {
LOGGER.finer("Send request, failed transmissions: " + exchange.getFailedTransmissionCount());
if (request.getType() == null) request.setType(Type.CON);
if (request.getType() == Type.CON) {
prepareRetransmission(
exchange,
new RetransmissionTask(exchange, request) {
public void retransmit() {
sendRequest(exchange, request);
}
});
}
super.sendRequest(exchange, request);
}
@Override
public void sendRequest(Exchange exchange, Request request) {
if (request.getDestination() == null)
throw new NullPointerException("Request has no destination address");
if (request.getDestinationPort() == 0)
throw new NullPointerException("Request has no destination port");
matcher.sendRequest(exchange, request);
/*
* Logging here causes significant performance loss.
* If necessary, add an interceptor that logs the messages,
* e.g., the MessageTracer.
*/
for (MessageInterceptor interceptor : interceptors) interceptor.sendRequest(request);
// MessageInterceptor might have canceled
if (!request.isCanceled()) connector.send(serializer.serialize(request));
}
protected boolean checkResponse(Request request, Response response) {
boolean success = true;
success &= checkType(Type.CON, response.getType());
success &= checkInt(EXPECTED_RESPONSE_CODE.value, response.getCode().value, "code");
success &= checkToken(request.getToken(), response.getToken());
success &= hasContentType(response);
success &= hasNonEmptyPalyoad(response);
success &= hasObserve(response);
return success;
}
/*
* The endpoint's executor executes this method to convert the raw bytes
* into a message, look for an associated exchange and forward it to
* the stack of layers.
*/
private void receiveMessage(RawData raw) {
DataParser parser = new DataParser(raw.getBytes());
if (parser.isRequest()) {
// This is a request
Request request;
try {
request = parser.parseRequest();
} catch (IllegalStateException e) {
StringBuffer log =
new StringBuffer("message format error caused by ")
.append(raw.getInetSocketAddress());
if (!parser.isReply()) {
// manually build RST from raw information
EmptyMessage rst = new EmptyMessage(Type.RST);
rst.setDestination(raw.getAddress());
rst.setDestinationPort(raw.getPort());
rst.setMID(parser.getMID());
for (MessageInterceptor interceptor : interceptors) interceptor.sendEmptyMessage(rst);
connector.send(serializer.serialize(rst));
log.append(" and reset");
}
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.info(log.toString());
}
return;
}
request.setSource(raw.getAddress());
request.setSourcePort(raw.getPort());
request.setSenderIdentity(raw.getSenderIdentity());
/*
* Logging here causes significant performance loss.
* If necessary, add an interceptor that logs the messages,
* e.g., the MessageTracer.
*/
for (MessageInterceptor interceptor : interceptors) interceptor.receiveRequest(request);
// MessageInterceptor might have canceled
if (!request.isCanceled()) {
Exchange exchange = matcher.receiveRequest(request);
if (exchange != null) {
exchange.setEndpoint(CoAPEndpoint.this);
coapstack.receiveRequest(exchange, request);
}
}
} else if (parser.isResponse()) {
// This is a response
Response response = parser.parseResponse();
response.setSource(raw.getAddress());
response.setSourcePort(raw.getPort());
/*
* Logging here causes significant performance loss.
* If necessary, add an interceptor that logs the messages,
* e.g., the MessageTracer.
*/
for (MessageInterceptor interceptor : interceptors) interceptor.receiveResponse(response);
// MessageInterceptor might have canceled
if (!response.isCanceled()) {
Exchange exchange = matcher.receiveResponse(response);
if (exchange != null) {
exchange.setEndpoint(CoAPEndpoint.this);
response.setRTT(System.currentTimeMillis() - exchange.getTimestamp());
coapstack.receiveResponse(exchange, response);
} else if (response.getType() != Type.ACK) {
LOGGER.fine("Rejecting unmatchable response from " + raw.getInetSocketAddress());
reject(response);
}
}
} else if (parser.isEmpty()) {
// This is an empty message
EmptyMessage message = parser.parseEmptyMessage();
message.setSource(raw.getAddress());
message.setSourcePort(raw.getPort());
/*
* Logging here causes significant performance loss.
* If necessary, add an interceptor that logs the messages,
* e.g., the MessageTracer.
*/
for (MessageInterceptor interceptor : interceptors)
interceptor.receiveEmptyMessage(message);
// MessageInterceptor might have canceled
if (!message.isCanceled()) {
// CoAP Ping
if (message.getType() == Type.CON || message.getType() == Type.NON) {
LOGGER.info("Responding to ping by " + raw.getInetSocketAddress());
reject(message);
} else {
Exchange exchange = matcher.receiveEmptyMessage(message);
if (exchange != null) {
exchange.setEndpoint(CoAPEndpoint.this);
coapstack.receiveEmptyMessage(exchange, message);
}
}
}
} else {
LOGGER.finest("Silently ignoring non-CoAP message from " + raw.getInetSocketAddress());
}
}
@Override
protected synchronized void executeRequest(
Request request, String serverURI, String resourceUri) {
// defensive check for slash
if (!serverURI.endsWith("/") && !resourceUri.startsWith("/")) {
resourceUri = "/" + resourceUri;
}
URI uri = null;
try {
uri = new URI(serverURI + resourceUri);
} catch (URISyntaxException use) {
throw new IllegalArgumentException("Invalid URI: " + use.getMessage());
}
request.setURI(uri);
// for observing
int observeLoop = 2;
// print request info
if (verbose) {
System.out.println("Request for test " + this.testName + " sent");
Utils.prettyPrint(request);
}
// execute the request
try {
Response response = null;
boolean success = true;
long time = 5000;
request.send();
System.out.println();
System.out.println("**** TEST: " + testName + " ****");
System.out.println("**** BEGIN CHECK ****");
response = request.waitForResponse(time);
if (response != null) {
success &= checkType(Type.ACK, response.getType());
success &= checkInt(EXPECTED_RESPONSE_CODE.value, response.getCode().value, "code");
success &= checkToken(request.getToken(), response.getToken());
success &= hasContentType(response);
success &= hasNonEmptyPalyoad(response);
success &= hasObserve(response);
if (success) {
time = response.getOptions().getMaxAge() * 1000;
System.out.println("+++++ Max-Age: " + time + " +++++");
if (time == 0) time = 5000;
for (int l = 0; success && (l < observeLoop); ++l) {
response = request.waitForResponse(time + 1000);
// checking the response
if (response != null) {
System.out.println("Received notification " + l);
// print response info
if (verbose) {
System.out.println("Response received");
System.out.println("Time elapsed (ms): " + response.getRTT());
Utils.prettyPrint(response);
}
success &= checkResponse(request, response);
} else {
System.out.println("FAIL: Notifications stopped");
success = false;
break;
} // response != null
} // observeLoop
if (response != null) {
System.out.println("+++++++ Canceling +++++++");
request.cancel(); // stack should send RST
Thread.sleep(time + time / 2);
} else {
System.out.println("FAIL: Notifications stopped");
success = false;
}
}
} else {
System.out.println("FAIL: No notification after registration");
success = false;
}
if (success) {
System.out.println("**** TEST PASSED ****");
addSummaryEntry(testName + ": PASSED (conditionally)");
} else {
System.out.println("**** TEST FAILED ****");
addSummaryEntry(testName + ": --FAILED--");
}
tickOffTest();
} catch (InterruptedException e) {
System.err.println("Interupted during receive: " + e.getMessage());
System.exit(-1);
}
}
@Test
public void testNonConfirmable() throws Exception {
// send request
Request req2acc = new Request(Code.POST);
req2acc.setConfirmable(false);
req2acc.setURI("localhost:" + serverPort + "/" + ACC_RESOURCE);
req2acc.setPayload("client says hi");
req2acc.send();
// receive response and check
Response response = req2acc.waitForResponse(100);
assertNotNull(response);
assertEquals(response.getPayloadString(), SERVER_RESPONSE);
assertEquals(response.getType(), Type.NON);
Request req2noacc = new Request(Code.POST);
req2noacc.setConfirmable(false);
req2noacc.setURI("coap://localhost:" + serverPort + "/" + NO_ACC_RESOURCE);
req2noacc.setPayload("client says hi");
req2noacc.send();
// receive response and check
response = req2noacc.waitForResponse(100);
assertNotNull(response);
assertEquals(response.getPayloadString(), SERVER_RESPONSE);
assertEquals(response.getType(), Type.NON);
}
