/** * Wait for a response to a previously issued Interest. This function reads from the specified Portal * until the requested content is fully received. It's not very clever, as it ignores all incoming * portal message types except those that are CCNxContentObjects. * * @param portal An instance of CCNxPortal to read from. * * @return true If the requested content has been fully received, false otherwise. */ static bool _receiveResponseToIssuedInterest(CCNxPortal *portal, const CCNxName *domainPrefix) { bool isTransferComplete = false; while (isTransferComplete == false && ccnxPortal_IsError(portal) == false) { CCNxMetaMessage *response = ccnxPortal_Receive(portal, CCNxStackTimeout_Never); if (response != NULL) { if (ccnxMetaMessage_IsContentObject(response)) { CCNxContentObject *contentObject = ccnxMetaMessage_GetContentObject(response); // Receive the content message. This returns the number of blocks remaining // in the transfer. If it returns 0, it was the final block of the content // and we're done. if (_receiveContentObject(contentObject, domainPrefix) == 0) { isTransferComplete = true; } } ccnxMetaMessage_Release(&response); } } return isTransferComplete; }
int consumer(void) { parcSecurity_Init(); CCNxPortalFactory *factory = setupConsumerFactory(); CCNxPortal *portal = ccnxPortalFactory_CreatePortal(factory, ccnxPortalRTA_Message); assertNotNull(portal, "Expected a non-null CCNxPortal pointer."); CCNxName *name = ccnxName_CreateFromCString("lci:/Hello/World"); CCNxInterest *interest = ccnxInterest_CreateSimple(name); ccnxName_Release(&name); CCNxMetaMessage *message = ccnxMetaMessage_CreateFromInterest(interest); if (ccnxPortal_Send(portal, message,CCNxStackTimeout_Never)) { while (ccnxPortal_IsError(portal) == false) { CCNxMetaMessage *response = ccnxPortal_Receive(portal,CCNxStackTimeout_Never); if (response != NULL) { if (ccnxMetaMessage_IsContentObject(response)) { CCNxContentObject *contentObject = ccnxMetaMessage_GetContentObject(response); PARCBuffer *payload = ccnxContentObject_GetPayload(contentObject); char *string = parcBuffer_ToString(payload); printf("%s\n", string); parcMemory_Deallocate((void **)&string); break; } } ccnxMetaMessage_Release(&response); } } ccnxPortal_Release(&portal); ccnxPortalFactory_Release(&factory); parcSecurity_Fini(); return 0; }
int ccnGet(PARCIdentity *identity, CCNxName *name) { CCNxPortalFactory *factory = ccnxPortalFactory_Create(identity); CCNxPortal *portal = ccnxPortalFactory_CreatePortal(factory, ccnxPortalRTA_Message); assertNotNull(portal, "Expected a non-null CCNxPortal pointer."); CCNxInterest *interest = ccnxInterest_CreateSimple(name); ccnxName_Release(&name); CCNxMetaMessage *message = ccnxMetaMessage_CreateFromInterest(interest); if (ccnxPortal_Send(portal, message, CCNxStackTimeout_Never)) { while (ccnxPortal_IsError(portal) == false) { CCNxMetaMessage *response = ccnxPortal_Receive(portal, CCNxStackTimeout_Never); if (response != NULL) { if (ccnxMetaMessage_IsContentObject(response)) { CCNxContentObject *contentObject = ccnxMetaMessage_GetContentObject(response); PARCBuffer *payload = ccnxContentObject_GetPayload(contentObject); size_t length = parcBuffer_Remaining(payload); ssize_t nwritten = write(1, parcBuffer_Overlay(payload, length), length); assertTrue(nwritten == length, "Did not write whole buffer, got %zd expected %zu", nwritten, length); break; } ccnxMetaMessage_Release(&response); } } } ccnxPortal_Release(&portal); ccnxPortalFactory_Release(&factory); return 0; }
static const char * _athenactl_SendInterestControl(PARCIdentity *identity, CCNxMetaMessage *message) { const char *result = NULL; CCNxPortalFactory *factory = ccnxPortalFactory_Create(identity); CCNxPortal *portal = ccnxPortalFactory_CreatePortal(factory, ccnxPortalRTA_Message); assertNotNull(portal, "Expected a non-null CCNxPortal pointer."); athenactl_EncodeMessage(message); if (ccnxPortal_Send(portal, message, CCNxStackTimeout_Never)) { while (ccnxPortal_IsError(portal) == false) { CCNxMetaMessage *response = ccnxPortal_Receive(portal, CCNxStackTimeout_Never); if (response != NULL) { if (ccnxMetaMessage_IsContentObject(response)) { CCNxContentObject *contentObject = ccnxMetaMessage_GetContentObject(response); PARCBuffer *payload = ccnxContentObject_GetPayload(contentObject); if (payload) { result = parcBuffer_ToString(payload); } } ccnxMetaMessage_Release(&response); break; } } } ccnxPortal_Release(&portal); ccnxPortalFactory_Release(&factory); return result; }
LONGBOW_TEST_CASE(Global, ccnxPortal_IsError) { TestData *data = longBowTestCase_GetClipBoardData(testCase); CCNxPortal *portal = ccnxPortalFactory_CreatePortal(data->factory, TEST_STACK); CCNxName *name = ccnxName_CreateFromCString("lci:/Hello/World"); CCNxInterest *interest = ccnxInterest_CreateSimple(name); ccnxName_Release(&name); CCNxMetaMessage *message = ccnxMetaMessage_CreateFromInterest(interest); ccnxPortal_Send(portal, message, CCNxStackTimeout_Never); ccnxPortal_Flush(portal, CCNxStackTimeout_Never); bool actual = ccnxPortal_IsError(portal); ccnxMetaMessage_Release(&message); ccnxInterest_Release(&interest); ccnxPortal_Release(&portal); assertFalse(actual, "Expected not to have an error status"); }
/** * Run the consumer to fetch the specified file. Save it to disk once transferred. * * @param [in] target Name of the content to request. * @param [in] outFile Name of the file to which the buffer will be written. */ static int _ccnxFileRepoClient_Run(char *target, char *outFile) { parcSecurity_Init(); PARCLog *log = _ccnxFileRepoClient_CreateLogger(); CCNxPortalFactory *factory = _setupConsumerPortalFactory(); CCNxPortal *portal = ccnxPortalFactory_CreatePortal(factory, ccnxPortalRTA_Message); assertNotNull(portal, "Expected a non-null CCNxPortal pointer."); CCNxName *name = ccnxName_CreateFromCString(target); CCNxInterest *interest = ccnxInterest_CreateSimple(name); CCNxMetaMessage *message = ccnxMetaMessage_CreateFromInterest(interest); if (ccnxPortal_Send(portal, message, CCNxStackTimeout_Never)) { while (ccnxPortal_IsError(portal) == false) { CCNxMetaMessage *response = ccnxPortal_Receive(portal, CCNxStackTimeout_Never); if (response != NULL) { if (ccnxMetaMessage_IsManifest(response)) { parcLog_Info(log, "Received root manifest. Beginning to retrieve the content."); // Extract the manifest and instantiate a new fetcher for it CCNxManifest *root = ccnxMetaMessage_GetManifest(response); CCNxFileRepoManifestFetcher *fetcher = ccnxFileRepoManifestFetcher_Create(portal, root); // Initialize the file offset and I/O buffer size_t fileOffset = 0; PARCBuffer *chunkBuffer = parcBuffer_Allocate(ccnxFileRepoCommon_ClientBufferSize); // Start reading from the manifest until done bool done = false; while (!done) { // Reset the buffer information parcBuffer_SetPosition(chunkBuffer, 0); parcBuffer_SetLimit(chunkBuffer, ccnxFileRepoCommon_ClientBufferSize); // Fill the buffer with data from the manifest done = ccnxFileRepoManifestFetcher_FillBuffer(fetcher, chunkBuffer); parcBuffer_Flip(chunkBuffer); // Write the buffer to the file size_t totalSize = parcBuffer_Remaining(chunkBuffer); _ccnxFileRepoClient_AppendBufferToFile(outFile, chunkBuffer, fileOffset); fileOffset += totalSize; // Flip the buffer back around for writing parcBuffer_Flip(chunkBuffer); } parcBuffer_Release(&chunkBuffer); break; } else if (ccnxMetaMessage_IsContentObject(response)) { parcLog_Info(log, "Received a content object. Dump the payload and exit."); CCNxContentObject *contentObject = ccnxMetaMessage_GetContentObject(response); PARCBuffer *payload = ccnxContentObject_GetPayload(contentObject); _ccnxFileRepoClient_AppendBufferToFile(outFile, payload, 0); break; } } ccnxMetaMessage_Release(&response); } } ccnxPortal_Release(&portal); ccnxPortalFactory_Release(&factory); parcSecurity_Fini(); return 0; }