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Diffstat (limited to 'libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_OptionalHeadersDecoder.h')
-rwxr-xr-x | libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_OptionalHeadersDecoder.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_OptionalHeadersDecoder.h b/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_OptionalHeadersDecoder.h new file mode 100755 index 00000000..94463ad1 --- /dev/null +++ b/libccnx-common/ccnx/common/codec/schema_v1/ccnxCodecSchemaV1_OptionalHeadersDecoder.h @@ -0,0 +1,144 @@ +/* + * Copyright (c) 2017 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** + * @file ccnxCodecSchemaV1_OptionalHeadersDecoder.h + * @brief Decode the list of optional headers + * + * A reference to each optional header will be stored in the provided CCNxTlvDictionary. + * + */ + +#ifndef TransportRTA_ccnxCodecSchemaV1_OptionalHeadersDecoder_h +#define TransportRTA_ccnxCodecSchemaV1_OptionalHeadersDecoder_h + +#include <stdbool.h> + +#include <parc/algol/parc_Buffer.h> + +#include <ccnx/common/internal/ccnx_TlvDictionary.h> +#include <ccnx/common/codec/ccnxCodec_TlvDecoder.h> + +/** + * The decode a list of Version 1 optional headers + * + * The decoder should point to the first byte of the first optional header. + * The decoder will advance until the end of the buffer. + * It is an error for the last optional header to either go beyond the end of the + * decoder or for it to underrun the end of the decoder. It must exactly align. + * + * @param [in] decoder The decoder to parse + * @param [in] packetDictionary The results go directly in to the provided dictionary. + * + * @return true Fully parsed interest, no errors + * @return false Error decoding, decoder is left pointing to the first byte of the error + * + * Example: + * @code + * <#example#> + * @endcode + */ +bool ccnxCodecSchemaV1OptionalHeadersDecoder_Decode(CCNxCodecTlvDecoder *decoder, CCNxTlvDictionary *packetDictionary); + +/** + * A convenience function to return the Interest Fragment header buffer + * + * <#Paragraphs Of Explanation#> + * + * @param [in] packetDictionary The packet dictionary + * + * @return non-null The header buffer + * @return null The header does not exist + * + * Example: + * @code + * <#example#> + * @endcode + */ +PARCBuffer *ccnxCodecSchemaV1OptionalHeadersDecoder_GetInterestFragmentHeader(CCNxTlvDictionary *packetDictionary); + +/** + * A convenience function to return the Content Object Fragment header buffer + * + * <#Paragraphs Of Explanation#> + * + * @param [in] packetDictionary The packet dictionary + * + * @return non-null The header buffer + * @return null The header does not exist + * + * Example: + * @code + * <#example#> + * @endcode + */ +PARCBuffer *ccnxCodecSchemaV1OptionalHeadersDecoder_GetContentObjectFragmentHeader(CCNxTlvDictionary *packetDictionary); + +/** + * A convenience function to return the Interest Lifetime header value + * + * Returns the byte array of the Interest Lifetime, which is encoded as a uint64_t milli-seconds + * since the UTC epoch. The PARCBuffer returned wraps the underlying memory so any changes to the + * buffer will be reflected in the header. + * + * @param [in] packetDictionary The packet dictionary + * + * @return number The Interest Lifetime + * + * Example: + * @code + * <#example#> + * @endcode + */ +uint64_t ccnxCodecSchemaV1OptionalHeadersDecoder_GetInterestLifetimeHeader(CCNxTlvDictionary *packetDictionary); + +/** + * A convenience function to return the Recommended Cache Time (RCT) header + * + * Returns the byte array of the RCT, which is encoded as a uint64_t milli-seconds + * since the UTC epoch. The PARCBuffer returned wraps the underlying memory so any changes to the + * buffer will be reflected in the header. + * + * @param [in] packetDictionary The packet dictionary + * + * @return number The Recommended Cache Time + * + * Example: + * @code + * <#example#> + * @endcode + */ +uint64_t ccnxCodecSchemaV1OptionalHeadersDecoder_GetRecommendedCacheTimeHeader(CCNxTlvDictionary *packetDictionary); + +uint64_t ccnxCodecSchemaV1OptionalHeadersDecoder_GetRecommendedPathLabel(CCNxTlvDictionary *packetDictionary); + +/** + * Retrieves a TLV header that is not part of the V1 schema spec + * + * <#Paragraphs Of Explanation#> + * + * @param [<#in out in,out#>] <#name#> <#description#> + * + * @return non-NULL The header + * @return NULL The header field does not exist + * + * Example: + * @code + * <#example#> + * @endcode + */ +PARCBuffer *ccnxCodecSchemaV1OptionalHeadersDecoder_GetCustomType(CCNxTlvDictionary *packetDictionary, uint32_t key); + +#endif // TransportRTA_ccnxCodecSchemaV1_OptionalHeadersDecoder_h |