/**
* Listen for arriving Interests and respond to them if possible. We expect that the Portal we are passed is
* listening for messages matching the specified domainPrefix.
*
* @param [in] portal The CCNxPortal that we will read from.
* @param [in] domainPrefix A CCNxName containing the domain prefix that the specified `portal` is listening for.
* @param [in] directoryPath A string containing the path to the directory being served.
*
* @return true if at least one Interest is received and responded to, false otherwise.
*/
static bool
_receiveAndAnswerInterests(CCNxPortal *portal, const CCNxName *domainPrefix, const char *directoryPath)
{
bool result = false;
CCNxMetaMessage *inboundMessage = NULL;
while ((inboundMessage = ccnxPortal_Receive(portal)) != NULL) {
if (ccnxMetaMessage_IsInterest(inboundMessage)) {
CCNxInterest *interest = ccnxMetaMessage_GetInterest(inboundMessage);
CCNxContentObject *response = _createInterestResponse(interest, domainPrefix, directoryPath);
// At this point, response has either the requested chunk of the request file/command,
// or remains NULL.
if (response != NULL) {
// We had a response, so send it back through the Portal.
CCNxMetaMessage *responseMessage = ccnxMetaMessage_CreateFromContentObject(response);
if (ccnxPortal_Send(portal, responseMessage) == false) {
fprintf(stderr, "ccnxPortal_Send failed (error %d). Is the Forwarder running?\n", ccnxPortal_GetError(portal));
}
ccnxMetaMessage_Release(&responseMessage);
ccnxContentObject_Release(&response);
result = true; // We have received, and responded to, at least one Interest.
}
}
ccnxMetaMessage_Release(&inboundMessage);
}
return result;
}
void
athena_ProcessMessage(Athena *athena, CCNxMetaMessage *ccnxMessage, PARCBitVector *ingressVector)
{
if (ccnxMetaMessage_IsInterest(ccnxMessage)) {
const char *name = ccnxName_ToString(ccnxInterest_GetName(ccnxMessage));
parcLog_Debug(athena->log, "Processing Interest Message: %s", name);
parcMemory_Deallocate(&name);
CCNxInterest *interest = ccnxMetaMessage_GetInterest(ccnxMessage);
_processInterest(athena, interest, ingressVector);
athena->stats.numProcessedInterests++;
} else if (ccnxMetaMessage_IsContentObject(ccnxMessage)) {
const char *name = ccnxName_ToString(ccnxContentObject_GetName(ccnxMessage));
parcLog_Debug(athena->log, "Processing Content Object Message: %s", name);
parcMemory_Deallocate(&name);
CCNxContentObject *contentObject = ccnxMetaMessage_GetContentObject(ccnxMessage);
_processContentObject(athena, contentObject, ingressVector);
athena->stats.numProcessedContentObjects++;
} else if (ccnxMetaMessage_IsControl(ccnxMessage)) {
parcLog_Debug(athena->log, "Processing Control Message");
CCNxControl *control = ccnxMetaMessage_GetControl(ccnxMessage);
_processControl(athena, control, ingressVector);
athena->stats.numProcessedControlMessages++;
} else if (ccnxMetaMessage_IsInterestReturn(ccnxMessage)) {
parcLog_Debug(athena->log, "Processing Interest Return Message");
CCNxInterestReturn *interestReturn = ccnxMetaMessage_GetInterestReturn(ccnxMessage);
_processInterestReturn(athena, interestReturn, ingressVector);
athena->stats.numProcessedInterestReturns++;
} else {
trapUnexpectedState("Invalid CCNxMetaMessage type");
}
}
int
reader_writer(CCNxPortalFactory *factory, const char *uri)
{
CCNxPortal *portal = ccnxPortalFactory_GetInstance(factory, ccnxPortalTypeDatagram, ccnxPortalProtocol_TLV, &ccnxPortalAttributes_Blocking);
CCNxName *prefix = ccnxName_CreateFromURI(uri);
CCNxName *bye = ccnxName_CreateFromURI("lci:/Hello/Goodbye%21");
CCNxName *contentname = ccnxName_CreateFromURI("lci:/Hello/World");
if (ccnxPortal_Listen(portal, prefix, 365 * 86400, CCNxStackTimeout_Never)) {
CCNxMetaMessage *msg;
while ((msg = ccnxPortal_Receive(portal, CCNxStackTimeout_Never)) != NULL) {
if (ccnxMetaMessage_IsInterest(msg)) {
CCNxInterest *interest = ccnxMetaMessage_GetInterest(msg);
CCNxName *interestName = ccnxInterest_GetName(interest);
if (ccnxName_Equals(interestName, contentname)) {
const PARCKeyId *publisherKeyId = ccnxPortal_GetKeyId(portal);
char buffer[128];
time_t theTime = time(0);
sprintf(buffer, "Hello World. The time is %s", ctime(&theTime));
PARCBuffer *payload = parcBuffer_CreateFromArray(buffer, 128);
parcBuffer_Flip(payload);
PARCBuffer *b = parcBuffer_Acquire(payload);
CCNxContentObject *uob = ccnxContentObject_CreateWithDataPayload(contentname, b);
// missing NULL check, case 1024
CCNxMetaMessage *message = ccnxMetaMessage_CreateFromContentObject(uob);
if (ccnxPortal_Send(portal, message, CCNxTransportStackTimeCCNxStackTimeout_Neverout_Never) == false) {
fprintf(stderr, "ccnx_write failed\n");
}
// ccnxMessage_Release(message);
} else if (ccnxName_Equals(interestName, bye)) {
break;
}
} else {
ccnxMetaMessage_Display(msg, 0);
}
ccnxMetaMessage_Release(&msg);
}
}
ccnxName_Release(&prefix);
ccnxName_Release(&bye);
ccnxName_Release(&contentname);
ccnxPortal_Release(&portal);
return 0;
}
PARCBitVector *
athenaTransportLinkAdapter_Send(AthenaTransportLinkAdapter *athenaTransportLinkAdapter,
CCNxMetaMessage *ccnxMetaMessage,
PARCBitVector *linkOutputVector)
{
PARCBitVector *resultVector = parcBitVector_Create();
int nextLinkToWrite = 0;
if (athenaTransportLinkAdapter->instanceList == NULL) {
return resultVector;
}
while ((nextLinkToWrite = parcBitVector_NextBitSet(linkOutputVector, nextLinkToWrite)) >= 0) {
athenaTransportLinkAdapter->stats.messageSend_Attempted++;
if (nextLinkToWrite >= parcArrayList_Size(athenaTransportLinkAdapter->instanceList)) {
athenaTransportLinkAdapter->stats.messageSend_LinkDoesNotExist++;
nextLinkToWrite++;
continue;
}
AthenaTransportLink *athenaTransportLink = parcArrayList_Get(athenaTransportLinkAdapter->instanceList, nextLinkToWrite);
if (athenaTransportLink == NULL) {
athenaTransportLinkAdapter->stats.messageSend_LinkDoesNotExist++;
nextLinkToWrite++;
continue;
}
if (!(athenaTransportLink_GetEvent(athenaTransportLink) & AthenaTransportLinkEvent_Send)) {
athenaTransportLinkAdapter->stats.messageSend_LinkNotAcceptingSendRequests++;
nextLinkToWrite++;
continue;
}
// If we're sending an interest to a non-local link,
// check that it has a sufficient hoplimit.
if (ccnxMetaMessage_IsInterest(ccnxMetaMessage)) {
if (athenaTransportLink_IsNotLocal(athenaTransportLink)) {
if (ccnxInterest_GetHopLimit(ccnxMetaMessage) == 0) {
athenaTransportLinkAdapter->stats.messageSend_HopLimitExceeded++;
nextLinkToWrite++;
continue;
}
}
}
int result = athenaTransportLink_Send(athenaTransportLink, ccnxMetaMessage);
if (result == 0) {
athenaTransportLinkAdapter->stats.messageSent++;
parcBitVector_Set(resultVector, nextLinkToWrite);
} else {
athenaTransportLinkAdapter->stats.messageSend_LinkSendFailed++;
}
nextLinkToWrite++;
}
return resultVector;
}
LONGBOW_TEST_CASE(Global, ccnxMetaMessage_IsInterest)
{
CCNxName *name = ccnxName_CreateFromCString("lci:/foo/bar");
CCNxInterest *interest = ccnxInterest_CreateSimple(name);
CCNxMetaMessage *portalMessage = ccnxMetaMessage_CreateFromInterest(interest);
assertTrue(ccnxMetaMessage_IsInterest(portalMessage), "Expected portal message to be an Interest");
assertFalse(ccnxMetaMessage_IsContentObject(portalMessage), "Did not expect portal message to be a ContentObject");
assertFalse(ccnxMetaMessage_IsControl(portalMessage), "Did not expect portal message to be a Control message");
ccnxMetaMessage_Release(&portalMessage);
ccnxInterest_Release(&interest);
ccnxName_Release(&name);
}
static CCNxMetaMessage *
_athenaLRUContentStore_ProcessMessage(AthenaContentStoreImplementation *store, const CCNxMetaMessage *message)
{
CCNxMetaMessage *result = NULL;
AthenaLRUContentStore *impl = (AthenaLRUContentStore *) store;
if (ccnxMetaMessage_IsInterest(message)) {
CCNxInterest *interest = ccnxMetaMessage_GetInterest(message);
CCNxName *queryName = ccnxInterest_GetName(interest);
uint64_t chunkNumber = 0;
bool hasChunkNumber = false;
_getChunkNumberFromName(queryName, &chunkNumber, &hasChunkNumber);
assertFalse(hasChunkNumber, "LRUContentStore queries don't yet support more than 1 chunk.");
PARCBuffer *responsePayload = NULL;
// Find the arguments to our query.
size_t argSegmentIndex = 0;
if (_getSegmentIndexOfQueryArgs(queryName, AthenaModule_ContentStore, &argSegmentIndex)) {
CCNxNameSegment *queryTypeSegment = ccnxName_GetSegment(queryName, argSegmentIndex);
char *queryTypeString = ccnxNameSegment_ToString(queryTypeSegment); // e.g. "stat"
char *statString = "stat";
if (strncasecmp(queryTypeString, statString, strlen(statString)) == 0) {
responsePayload = _processStatQuery(impl, queryName, argSegmentIndex + 1, chunkNumber);
}
parcMemory_Deallocate(&queryTypeString);
}
if (responsePayload != NULL) {
CCNxContentObject *contentObjectResponse = ccnxContentObject_CreateWithNameAndPayload(
ccnxInterest_GetName(interest), responsePayload);
result = ccnxMetaMessage_CreateFromContentObject(contentObjectResponse);
ccnxContentObject_SetExpiryTime(contentObjectResponse,
parcClock_GetTime(impl->wallClock) +
100); // this response is good for 100 millis
ccnxContentObject_Release(&contentObjectResponse);
parcBuffer_Release(&responsePayload);
}
}
return result; // could be NULL
}
LONGBOW_TEST_CASE(Global, ccnxMetaMessage_IsContentObject)
{
CCNxName *name = ccnxName_CreateFromCString("lci:/foo/bar");
PARCBuffer *payload = parcBuffer_WrapCString("This is some data. It's not good data, but it is data.");
CCNxContentObject *contentObject = ccnxContentObject_CreateWithNameAndPayload(name, payload);
CCNxMetaMessage *portalMessage = ccnxMetaMessage_CreateFromContentObject(contentObject);
assertTrue(ccnxMetaMessage_IsContentObject(portalMessage), "Expected portal message to be an ContentObject");
assertFalse(ccnxMetaMessage_IsInterest(portalMessage), "Did not expect portal message to be an Interest");
assertFalse(ccnxMetaMessage_IsControl(portalMessage), "Did not expect portal message to be a Control message");
ccnxMetaMessage_Release(&portalMessage);
ccnxContentObject_Release(&contentObject);
parcBuffer_Release(&payload);
ccnxName_Release(&name);
}
