LONGBOW_TEST_CASE(Global, ccnxCodecSchemaV1ManifestDecoder_DecodeType)
{
uint8_t rawManifest[40] = { 0x00, 0x07, 0x00, 0x24,
0x00, 0x02, 0x00, 0x20,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46 };
PARCBuffer *wireFormat = parcBuffer_Flip(parcBuffer_CreateFromArray(rawManifest, 40));
CCNxCodecTlvDecoder *decoder = ccnxCodecTlvDecoder_Create(wireFormat);
CCNxTlvDictionary *dict = ccnxCodecSchemaV1TlvDictionary_CreateManifest();
uint16_t type = ccnxCodecTlvDecoder_GetType(decoder);
uint16_t length = ccnxCodecTlvDecoder_GetLength(decoder);
bool result = _decodeType(decoder, dict, type, length);
assertTrue(result, "Expected the manifest type to be correctly decoded at the top level");
ccnxManifest_Release(&dict);
ccnxCodecTlvDecoder_Destroy(&decoder);
parcBuffer_Release(&wireFormat);
}
/**
* Decodes the CCNx message inside a TLV packet
*
* Creates an inner decoder that slices the decode buffer then passes that and our
* message dictionary to the appropriate inner decoder.
*
* @param [in] data The packet decoder state
*
* @return true successful decode
* @return false A decoding error
*
* Example:
* @code
* <#example#>
* @endcode
*/
static bool
_decodeMessage(_CCNxCodecSchemaV1Data *data)
{
bool success = false;
if (ccnxCodecTlvDecoder_EnsureRemaining(data->decoder, 4)) {
// what kind of message are we looking at?
// Note that this is based on the TLV container, not the fixed head PacketType
uint16_t tlv_type = ccnxCodecTlvDecoder_GetType(data->decoder);
uint16_t tlv_length = ccnxCodecTlvDecoder_GetLength(data->decoder);
// ensure its a proper tlv type
switch (tlv_type) {
case CCNxCodecSchemaV1Types_MessageType_Interest: // fallthrough
case CCNxCodecSchemaV1Types_MessageType_ContentObject: // fallthrough
case CCNxCodecSchemaV1Types_MessageType_Control: // fallthrough
break;
default:
return false;
}
// cross check with the fixed header value
// ccnxCodecSchemaV1FixedHeaderDecoder_Decode ensures that PacketLength is not less than HeaderLength
size_t messageLength = ccnxCodecSchemaV1FixedHeaderDecoder_GetPacketLength(data->packetDictionary) - ccnxCodecSchemaV1FixedHeaderDecoder_GetHeaderLength(data->packetDictionary);
if (tlv_length <= messageLength && ccnxCodecTlvDecoder_EnsureRemaining(data->decoder, tlv_length)) {
// This decode is for the "value" of the message, it does not include the wrapper
CCNxCodecTlvDecoder *messageDecoder = ccnxCodecTlvDecoder_GetContainer(data->decoder, tlv_length);
if (tlv_type == CCNxCodecSchemaV1Types_MessageType_Control) {
// the CPI messages are not a proper "message" in that there's no inner TLV, its just data
success = _decodeCPI(messageDecoder, data->packetDictionary);
} else {
success = ccnxCodecSchemaV1MessageDecoder_Decode(messageDecoder, data->packetDictionary);
}
ccnxCodecTlvDecoder_Destroy(&messageDecoder);
} else {
// raise an error
CCNxCodecError *error = ccnxCodecError_Create(TLV_ERR_TOO_LONG, __func__, __LINE__, ccnxCodecTlvDecoder_Position(data->decoder));
ccnxCodecTlvDecoder_SetError(data->decoder, error);
ccnxCodecError_Release(&error);
}
}
return success;
}
bool
ccnxCodecTlvUtilities_DecodeContainer(CCNxCodecTlvDecoder *decoder, CCNxTlvDictionary *packetDictionary, bool (*typeDecoder)(CCNxCodecTlvDecoder *decoder, CCNxTlvDictionary *packetDictionary, uint16_t type, uint16_t length))
{
while (ccnxCodecTlvDecoder_EnsureRemaining(decoder, 4)) {
uint16_t type = ccnxCodecTlvDecoder_GetType(decoder);
uint16_t length = ccnxCodecTlvDecoder_GetLength(decoder);
if (ccnxCodecTlvDecoder_EnsureRemaining(decoder, length)) {
bool success = typeDecoder(decoder, packetDictionary, type, length);
if (!success) {
return false;
}
} else {
// overflow! The TLV length goes beyond the end of the container
return false;
}
}
// Make sure we used up the whole buffer. If we're at the end,
// then it was a successful decode, otherwise something is wrong.
return ccnxCodecTlvDecoder_IsEmpty(decoder);
}
static bool
_decodeValidationPayload(_CCNxCodecSchemaV1Data *data)
{
bool success = false;
if (ccnxCodecTlvDecoder_EnsureRemaining(data->decoder, 4)) {
// what kind of message are we looking at?
// Note that this is based on the TLV container, not the fixed head PacketType
uint16_t tlv_type = ccnxCodecTlvDecoder_GetType(data->decoder);
uint16_t tlv_length = ccnxCodecTlvDecoder_GetLength(data->decoder);
if (tlv_type == CCNxCodecSchemaV1Types_MessageType_ValidationPayload &&
ccnxCodecTlvDecoder_EnsureRemaining(data->decoder, tlv_length)) {
CCNxCodecTlvDecoder *decoder = ccnxCodecTlvDecoder_GetContainer(data->decoder, tlv_length);
success = ccnxCodecSchemaV1ValidationDecoder_DecodePayload(decoder, data->packetDictionary);
ccnxCodecTlvDecoder_Destroy(&decoder);
}
}
return success;
}
LONGBOW_TEST_CASE(Global, ccnxCodecSchemaV1ManifestDecoder_DecodeHashGroup)
{
uint8_t rawManifest[40] = { 0x00, 0x07, 0x00, 0x24,
0x00, 0x02, 0x00, 0x20,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46,
0x46, 0x46, 0x46, 0x46 };
PARCBuffer *wireFormat = parcBuffer_Flip(parcBuffer_CreateFromArray(rawManifest, 40));
CCNxCodecTlvDecoder *decoder = ccnxCodecTlvDecoder_Create(wireFormat);
CCNxTlvDictionary *dict = ccnxCodecSchemaV1TlvDictionary_CreateManifest();
ccnxCodecTlvDecoder_GetType(decoder); // swallow type
uint16_t length = ccnxCodecTlvDecoder_GetLength(decoder);
CCNxManifestHashGroup *group = ccnxManifestHashGroup_Create();
bool result = _decodeHashGroup(decoder, dict, group, length);
assertTrue(result, "Expected hash group to be decoded correctly.");
PARCBuffer *expectedPointer = parcBuffer_AllocateCString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
CCNxManifestHashGroupPointer *pointer = ccnxManifestHashGroup_GetPointerAtIndex(group, 0);
const PARCBuffer *actualPointer = ccnxManifestHashGroupPointer_GetDigest(pointer);
assertTrue(parcBuffer_Equals(expectedPointer, actualPointer), "Expected decoded pointer to equal %s, got %s", parcBuffer_ToHexString(expectedPointer), parcBuffer_ToHexString(actualPointer));
parcBuffer_Release(&expectedPointer);
ccnxManifestHashGroup_Release(&group);
ccnxManifest_Release(&dict);
ccnxCodecTlvDecoder_Destroy(&decoder);
parcBuffer_Release(&wireFormat);
}
static bool
_decodeValidationAlg(_CCNxCodecSchemaV1Data *data)
{
bool success = false;
if (ccnxCodecTlvDecoder_EnsureRemaining(data->decoder, 4)) {
// what kind of message are we looking at?
// Note that this is based on the TLV container, not the fixed head PacketType
uint16_t tlv_type = ccnxCodecTlvDecoder_GetType(data->decoder);
uint16_t tlv_length = ccnxCodecTlvDecoder_GetLength(data->decoder);
if (tlv_type == CCNxCodecSchemaV1Types_MessageType_ValidationAlg &&
ccnxCodecTlvDecoder_EnsureRemaining(data->decoder, tlv_length)) {
CCNxCodecTlvDecoder *decoder = ccnxCodecTlvDecoder_GetContainer(data->decoder, tlv_length);
success = ccnxCodecSchemaV1ValidationDecoder_DecodeAlg(decoder, data->packetDictionary);
ccnxCodecTlvDecoder_Destroy(&decoder);
} else {
// raise and error
if (!ccnxCodecTlvDecoder_EnsureRemaining(data->decoder, tlv_length)) {
// tlv_length goes beyond the decoder
CCNxCodecError *error = ccnxCodecError_Create(TLV_ERR_TOO_LONG, __func__, __LINE__, ccnxCodecTlvDecoder_Position(data->decoder));
ccnxCodecTlvDecoder_SetError(data->decoder, error);
ccnxCodecError_Release(&error);
} else {
// not CCNxCodecSchemaV1Types_MessageType_ValidationAlg
CCNxCodecError *error = ccnxCodecError_Create(TLV_ERR_DECODE, __func__, __LINE__, ccnxCodecTlvDecoder_Position(data->decoder));
ccnxCodecTlvDecoder_SetError(data->decoder, error);
ccnxCodecError_Release(&error);
}
}
}
return success;
}
LONGBOW_TEST_CASE(Global, ccnxCodecSchemaV1ManifestDecoder_DecodeHashGroupMetadata)
{
// Re-build the expected metadata from the manifest
CCNxName *groupLocator = ccnxName_CreateFromCString("ccnx:/locator");
PARCBuffer *digest = parcBuffer_Allocate(16);
for (size_t i = 0; i < parcBuffer_Limit(digest); i++) {
parcBuffer_PutUint8(digest, 0);
}
parcBuffer_Flip(digest);
size_t entrySize = 1;
size_t dataSize = 2;
size_t blockSize = 3;
size_t treeHeight = 4;
// Compute the expected size of this metadata group.
size_t metadataSize = 4 * (4 + 8) + 4 + parcBuffer_Limit(digest) + 4 + strlen("ccnx:/locator");
// See test_ccnxCodecSchemaV1_ManifestEncoder.c for the packet construction details.
uint8_t rawMetadata[89] = { 0x00, CCNxCodecSchemaV1Types_CCNxManifestHashGroup_Metadata,
0x00, metadataSize,
0x00, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_Locator,
0x00, strlen("ccnx:/locator"),
'c', 'c',
'n', 'x',
':', '/',
'l', 'o',
'c', 'a',
't', 'o',
'r',
0x00, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_DataSize,
0x00, 0x08,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, dataSize,
0x00, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_BlockSize,
0x00, 0x08,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, blockSize,
0x00, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_EntrySize,
0x00, 0x08,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, entrySize,
0x00, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_TreeHeight,
0x00, 0x08,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, treeHeight,
0x00, CCNxCodecSchemaV1Types_CCNxManifestHashGroupMetadata_OverallDataSha256,
0x00, parcBuffer_Remaining(digest),
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00,
0x00, 0x00 };
PARCBuffer *wireFormat = parcBuffer_Flip(parcBuffer_CreateFromArray(rawMetadata, sizeof(rawMetadata)));
// Create the encoder and swallow the top level container
CCNxCodecTlvDecoder *decoder = ccnxCodecTlvDecoder_Create(wireFormat);
ccnxCodecTlvDecoder_GetType(decoder); // swallow type
uint16_t length = ccnxCodecTlvDecoder_GetLength(decoder);
// Decode the metadata
CCNxManifestHashGroup *group = ccnxManifestHashGroup_Create();
bool result = _decodeHashGroupMetadata(decoder, group, length);
assertTrue(result, "Expected hash group metadata to be decoded correctly.");
const CCNxName *actualLocator = ccnxManifestHashGroup_GetLocator(group);
size_t actualEntrySize = ccnxManifestHashGroup_GetEntrySize(group);
size_t actualDataSize = ccnxManifestHashGroup_GetDataSize(group);
size_t actualBlockSize = ccnxManifestHashGroup_GetBlockSize(group);
size_t actualTreeHeight = ccnxManifestHashGroup_GetTreeHeight(group);
const PARCBuffer *actualDigest = ccnxManifestHashGroup_GetOverallDataDigest(group);
assertTrue(ccnxName_Equals(groupLocator, actualLocator), "Expected decoded locator to equal %s, got %s", ccnxName_ToString(groupLocator), ccnxName_ToString(actualLocator));
assertTrue(entrySize == actualEntrySize, "Expected %zu entry size, got %zu", entrySize, actualEntrySize);
assertTrue(dataSize == actualDataSize, "Expected %zu data size, got %zu", dataSize, actualDataSize);
assertTrue(blockSize == actualBlockSize, "Expected %zu block size, got %zu", blockSize, actualBlockSize);
assertTrue(treeHeight == actualTreeHeight, "Expected %zu tree height, got %zu", treeHeight, actualTreeHeight);
assertTrue(parcBuffer_Equals(digest, actualDigest), "Expected %s digest, got %s", parcBuffer_ToHexString(digest), parcBuffer_ToHexString(actualDigest));
parcBuffer_Release(&digest);
ccnxName_Release(&groupLocator);
ccnxManifestHashGroup_Release(&group);
ccnxCodecTlvDecoder_Destroy(&decoder);
parcBuffer_Release(&wireFormat);
}
