static ndn_Error decodeValidityPeriod (struct ndn_ValidityPeriod *validityPeriod, struct ndn_TlvDecoder *decoder) { ndn_Error error; size_t endOffset; // Expect a 15-character ISO string like "20131018T184139". const size_t isoStringMaxLength = 15; char isoString[isoStringMaxLength + 1]; struct ndn_Blob isoStringBlob; if ((error = ndn_TlvDecoder_readNestedTlvsStart (decoder, ndn_Tlv_ValidityPeriod_ValidityPeriod, &endOffset))) return error; ndn_ValidityPeriod_clear(validityPeriod); // Decode notBefore as an ISO string. if ((error = ndn_TlvDecoder_readBlobTlv (decoder, ndn_Tlv_ValidityPeriod_NotBefore, &isoStringBlob))) return error; if (isoStringBlob.length > isoStringMaxLength) return NDN_ERROR_Calendar_time_value_out_of_range; ndn_memcpy((uint8_t *)isoString, isoStringBlob.value, isoStringBlob.length); isoString[isoStringBlob.length] = 0; if ((error = ndn_fromIsoString(isoString, &validityPeriod->notBefore))) return error; // Decode notAfter as an ISO string. if ((error = ndn_TlvDecoder_readBlobTlv (decoder, ndn_Tlv_ValidityPeriod_NotAfter, &isoStringBlob))) return error; if (isoStringBlob.length > isoStringMaxLength) return NDN_ERROR_Calendar_time_value_out_of_range; ndn_memcpy((uint8_t *)isoString, isoStringBlob.value, isoStringBlob.length); isoString[isoStringBlob.length] = 0; if ((error = ndn_fromIsoString(isoString, &validityPeriod->notAfter))) return error; if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset))) return error; return NDN_ERROR_success; }
void Node::RegisterResponse::operator()(const ptr_lib::shared_ptr<const Interest>& interest, const ptr_lib::shared_ptr<Data>& responseData) { // Decode responseData->getContent() and check for a success code. // TODO: Move this into the TLV code. struct ndn_TlvDecoder decoder; ndn_TlvDecoder_initialize (&decoder, responseData->getContent().buf(), responseData->getContent().size()); ndn_Error error; size_t endOffset; if ((error = ndn_TlvDecoder_readNestedTlvsStart (&decoder, ndn_Tlv_NfdCommand_ControlResponse, &endOffset))) { _LOG_DEBUG ("Register prefix failed: Error decoding the NFD response: " << ndn_getErrorString(error)); info_->onRegisterFailed_(info_->prefix_); return; } uint64_t statusCode; if ((error = ndn_TlvDecoder_readNonNegativeIntegerTlv (&decoder, ndn_Tlv_NfdCommand_StatusCode, &statusCode))) { _LOG_DEBUG ("Register prefix failed: Error decoding the NFD response: " << ndn_getErrorString(error)); info_->onRegisterFailed_(info_->prefix_); return; } // Status code 200 is "OK". if (statusCode != 200) { _LOG_DEBUG ("Register prefix failed: Expected NFD status code 200, got: " << statusCode); info_->onRegisterFailed_(info_->prefix_); return; } _LOG_DEBUG("Register prefix succeeded with the NFD forwarder for prefix " << info_->prefix_->toUri()); }
static ndn_Error decodeExclude(struct ndn_Exclude *exclude, struct ndn_TlvDecoder *decoder) { ndn_Error error; size_t endOffset; if ((error = ndn_TlvDecoder_readNestedTlvsStart(decoder, ndn_Tlv_Exclude, &endOffset))) return error; exclude->nEntries = 0; while (decoder->offset < endOffset) { int gotExpectedTag; if ((error = ndn_TlvDecoder_peekType (decoder, ndn_Tlv_Any, endOffset, &gotExpectedTag))) return error; if (gotExpectedTag) { // Read past the Any TLV. int dummyValue; if ((error = ndn_TlvDecoder_readBooleanTlv (decoder, ndn_Tlv_Any, endOffset, &dummyValue))) return error; if ((error = ndn_Exclude_appendAny(exclude))) return error; } else { // First append an empty component, then decode into it. if ((error = ndn_Exclude_appendComponent(exclude, 0, 0))) return error; if ((error = ndn_decodeTlvNameComponent (&exclude->entries[exclude->nEntries - 1].component, decoder))) return error; exclude->entries[exclude->nEntries - 1].type = ndn_Exclude_COMPONENT; } } if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset))) return error; return NDN_ERROR_success; }
ndn_Error ndn_decodeTlvControlResponse (struct ndn_ControlResponse *controlResponse, struct ndn_TlvDecoder *decoder) { ndn_Error error; size_t endOffset; int gotExpectedType; uint64_t statusCode; if ((error = ndn_TlvDecoder_readNestedTlvsStart (decoder, ndn_Tlv_NfdCommand_ControlResponse, &endOffset))) return error; if ((error = ndn_TlvDecoder_readNonNegativeIntegerTlv (decoder, ndn_Tlv_NfdCommand_StatusCode, &statusCode))) return error; controlResponse->statusCode = (int)statusCode; if ((error = ndn_TlvDecoder_readBlobTlv (decoder, ndn_Tlv_NfdCommand_StatusText, &controlResponse->statusText))) return error; // Decode the body. if ((error = ndn_TlvDecoder_peekType (decoder, ndn_Tlv_ControlParameters_ControlParameters, endOffset, &gotExpectedType))) return error; if (gotExpectedType) { controlResponse->hasBodyAsControlParameters = 1; if ((error = ndn_decodeTlvControlParameters (&controlResponse->bodyAsControlParameters, decoder))) return error; } else controlResponse->hasBodyAsControlParameters = 0; if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset))) return error; return NDN_ERROR_success; }
ndn_Error ndn_encodeTlvSignatureInfo (const struct ndn_Signature *signatureInfo, struct ndn_TlvEncoder *encoder) { if (signatureInfo->type == ndn_SignatureType_Generic) { // Handle a Generic signature separately since it has the entire encoding. const struct ndn_Blob *encoding = &signatureInfo->signatureInfoEncoding; ndn_Error error; size_t endOffset; uint64_t signatureType; // Do a test decoding to sanity check that it is valid TLV. struct ndn_TlvDecoder decoder; ndn_TlvDecoder_initialize(&decoder, encoding->value, encoding->length); error = ndn_TlvDecoder_readNestedTlvsStart (&decoder, ndn_Tlv_SignatureInfo, &endOffset); if (!error) error = ndn_TlvDecoder_readNonNegativeIntegerTlv (&decoder, ndn_Tlv_SignatureType, &signatureType); if (!error) error = ndn_TlvDecoder_finishNestedTlvs(&decoder, endOffset); if (error) return NDN_ERROR_The_Generic_signature_encoding_is_not_a_valid_NDN_TLV_SignatureInfo; return ndn_TlvEncoder_writeArray(encoder, encoding->value, encoding->length); } if (signatureInfo->type == ndn_SignatureType_Sha256WithRsaSignature || signatureInfo->type == ndn_SignatureType_Sha256WithEcdsaSignature || signatureInfo->type == ndn_SignatureType_HmacWithSha256Signature) return ndn_TlvEncoder_writeNestedTlv (encoder, ndn_Tlv_SignatureInfo, encodeSignatureWithKeyLocatorAndValidityPeriodValue, signatureInfo, 0); else if (signatureInfo->type == ndn_SignatureType_DigestSha256Signature) return ndn_TlvEncoder_writeNestedTlv (encoder, ndn_Tlv_SignatureInfo, encodeDigestSha256Value, signatureInfo, 0); else return NDN_ERROR_encodeSignatureInfo_unrecognized_SignatureType; }
ndn_Error ndn_decodeTlvLpPacket (struct ndn_LpPacket *lpPacket, struct ndn_TlvDecoder *decoder) { ndn_Error error; size_t endOffset; ndn_LpPacket_clear(lpPacket); if ((error = ndn_TlvDecoder_readNestedTlvsStart (decoder, ndn_Tlv_LpPacket_LpPacket, &endOffset))) return error; while (decoder->offset < endOffset) { // Imitate ndn_TlvDecoder_readTypeAndLength. uint64_t fieldTypeVarNumber; int fieldType; uint64_t fieldLength; size_t fieldEndOffset; if ((error = ndn_TlvDecoder_readVarNumber(decoder, &fieldTypeVarNumber))) return error; fieldType = (int)fieldTypeVarNumber; if ((error = ndn_TlvDecoder_readVarNumber(decoder, &fieldLength))) return error; fieldEndOffset = decoder->offset + (size_t)fieldLength; if (fieldEndOffset > decoder->inputLength) return NDN_ERROR_TLV_length_exceeds_buffer_length; if (fieldType == ndn_Tlv_LpPacket_Fragment) { // Set the fragment to the bytes of the TLV value. if ((error = ndn_TlvDecoder_getSlice (decoder, decoder->offset, fieldEndOffset, &lpPacket->fragmentWireEncoding))) return error; ndn_TlvDecoder_seek(decoder, fieldEndOffset); // The fragment is supposed to be the last field. break; } else if (fieldType == ndn_Tlv_LpPacket_Nack) { struct ndn_NetworkNack *networkNack; int code; if ((error = ndn_NetworkNack_add(lpPacket, &networkNack))) return error; if ((error = ndn_TlvDecoder_readOptionalNonNegativeIntegerTlv (decoder, ndn_Tlv_LpPacket_NackReason, fieldEndOffset, &code))) return error; // The enum numeric values are the same as this wire format, so use as is. if (code < 0 || code == ndn_NetworkNackReason_NONE) // This includes an omitted NackReason. networkNack->reason = ndn_NetworkNackReason_NONE; else if (code == ndn_NetworkNackReason_CONGESTION || code == ndn_NetworkNackReason_DUPLICATE || code == ndn_NetworkNackReason_NO_ROUTE) networkNack->reason = code; else { // Unrecognized reason. networkNack->reason = ndn_NetworkNackReason_OTHER_CODE; networkNack->otherReasonCode = code; } } else if (fieldType == ndn_Tlv_LpPacket_IncomingFaceId) { struct ndn_IncomingFaceId *incomingFaceId; if ((error = ndn_IncomingFaceId_add(lpPacket, &incomingFaceId))) return error; if ((error = ndn_TlvDecoder_readNonNegativeInteger (decoder, fieldLength, &incomingFaceId->faceId))) return error; } else { // Unrecognized field type. The conditions for ignoring are here: // http://redmine.named-data.net/projects/nfd/wiki/NDNLPv2 int canIgnore = (fieldType >= ndn_Tlv_LpPacket_IGNORE_MIN && fieldType <= ndn_Tlv_LpPacket_IGNORE_MAX && (fieldType & 0x01) == 1); if (!canIgnore) return NDN_ERROR_did_not_get_the_expected_TLV_type; // Ignore. ndn_TlvDecoder_seek(decoder, fieldEndOffset); } if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, fieldEndOffset))) return error; } if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset))) return error; return NDN_ERROR_success; }
static ndn_Error ndn_decodeTlvInterestV03 (struct ndn_Interest *interest, size_t *signedPortionBeginOffset, size_t *signedPortionEndOffset, struct ndn_TlvDecoder *decoder) { ndn_Error error; size_t endOffset; int canBePrefix, mustBeFresh; struct ndn_Blob dummyBlob; if ((error = ndn_TlvDecoder_readNestedTlvsStart (decoder, ndn_Tlv_Interest, &endOffset))) return error; if ((error = ndn_decodeTlvName (&interest->name, signedPortionBeginOffset, signedPortionEndOffset, decoder))) return error; if ((error = ndn_TlvDecoder_readBooleanTlv (decoder, ndn_Tlv_CanBePrefix, endOffset, &canBePrefix))) return error; ndn_Interest_setCanBePrefix(interest, canBePrefix); if ((error = ndn_TlvDecoder_readBooleanTlv (decoder, ndn_Tlv_MustBeFresh, endOffset, &mustBeFresh))) return error; ndn_Interest_setMustBeFresh(interest, mustBeFresh); // Get the encoded sequence of delegations as is. if ((error = ndn_TlvDecoder_readOptionalBlobTlv (decoder, ndn_Tlv_ForwardingHint, endOffset, &interest->forwardingHintWireEncoding))) return error; if ((error = ndn_TlvDecoder_readOptionalBlobTlv (decoder, ndn_Tlv_Nonce, endOffset, &interest->nonce))) return error; if ((error = ndn_TlvDecoder_readOptionalNonNegativeIntegerTlvAsDouble (decoder, ndn_Tlv_InterestLifetime, endOffset, &interest->interestLifetimeMilliseconds))) return error; // Clear the unused fields. interest->minSuffixComponents = -1; ndn_KeyLocator_initialize (&interest->keyLocator, interest->keyLocator.keyName.components, interest->keyLocator.keyName.maxComponents); interest->exclude.nEntries = 0; interest->childSelector = -1; ndn_Blob_initialize(&interest->linkWireEncoding, 0, 0); interest->selectedDelegationIndex = -1; // Ignore the HopLimit and Parameters. if ((error = ndn_TlvDecoder_readOptionalBlobTlv (decoder, ndn_Tlv_HopLimit, endOffset, &dummyBlob))) return error; if ((error = ndn_TlvDecoder_readOptionalBlobTlv (decoder, ndn_Tlv_Parameters, endOffset, &dummyBlob))) return error; if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset))) return error; return NDN_ERROR_success; }
static ndn_Error ndn_decodeTlvInterestV02 (struct ndn_Interest *interest, size_t *signedPortionBeginOffset, size_t *signedPortionEndOffset, struct ndn_TlvDecoder *decoder) { ndn_Error error; size_t endOffset; int gotExpectedType; if ((error = ndn_TlvDecoder_readNestedTlvsStart(decoder, ndn_Tlv_Interest, &endOffset))) return error; if ((error = ndn_decodeTlvName (&interest->name, signedPortionBeginOffset, signedPortionEndOffset, decoder))) return error; if ((error = ndn_TlvDecoder_peekType(decoder, ndn_Tlv_Selectors, endOffset, &gotExpectedType))) return error; if (gotExpectedType) { if ((error = decodeSelectors(interest, decoder))) return error; } else { // Set selectors to none. interest->minSuffixComponents = -1; interest->maxSuffixComponents = -1; ndn_KeyLocator_initialize (&interest->keyLocator, interest->keyLocator.keyName.components, interest->keyLocator.keyName.maxComponents); interest->exclude.nEntries = 0; interest->childSelector = -1; interest->mustBeFresh = 0; } // Require a Nonce, but don't force it to be 4 bytes. if ((error = ndn_TlvDecoder_readBlobTlv(decoder, ndn_Tlv_Nonce, &interest->nonce))) return error; if ((error = ndn_TlvDecoder_readOptionalNonNegativeIntegerTlvAsDouble (decoder, ndn_Tlv_InterestLifetime, endOffset, &interest->interestLifetimeMilliseconds))) return error; // Get the encoded sequence of delegations as is. if ((error = ndn_TlvDecoder_readOptionalBlobTlv (decoder, ndn_Tlv_ForwardingHint, endOffset, &interest->forwardingHintWireEncoding))) return error; if ((error = ndn_TlvDecoder_peekType(decoder, ndn_Tlv_Data, endOffset, &gotExpectedType))) return error; if (gotExpectedType) { // Get the bytes of the Link TLV. size_t linkBeginOffset = decoder->offset; size_t linkEndOffset; if ((error = ndn_TlvDecoder_readNestedTlvsStart (decoder, ndn_Tlv_Data, &linkEndOffset))) return error; ndn_TlvDecoder_seek(decoder, linkEndOffset); if ((error = ndn_TlvDecoder_getSlice (decoder, linkBeginOffset, linkEndOffset, &interest->linkWireEncoding))) return error; } else ndn_Blob_initialize(&interest->linkWireEncoding, 0, 0); if ((error = ndn_TlvDecoder_readOptionalNonNegativeIntegerTlv (decoder, ndn_Tlv_SelectedDelegation, endOffset, &interest->selectedDelegationIndex))) return error; if (interest->selectedDelegationIndex >= 0 && !interest->linkWireEncoding.value) return NDN_ERROR_Interest_has_a_selected_delegation_but_no_link_object; if ((error = ndn_TlvDecoder_finishNestedTlvs(decoder, endOffset))) return error; return NDN_ERROR_success; }