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- /*
- This file is part of GNUnet.
- Copyright (C) 2013, 2014 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @author Florian Dold
- * @author Christian Grothoff
- * @file set/gnunet-service-set_protocol.h
- * @brief Peer-to-Peer messages for gnunet set
- */
- #ifndef SET_PROTOCOL_H
- #define SET_PROTOCOL_H
- #include "platform.h"
- #include "gnunet_common.h"
- GNUNET_NETWORK_STRUCT_BEGIN
- struct OperationRequestMessage
- {
- /**
- * Type: #GNUNET_MESSAGE_TYPE_SET_P2P_OPERATION_REQUEST
- */
- struct GNUNET_MessageHeader header;
- /**
- * Operation to request, values from `enum GNUNET_SET_OperationType`
- */
- uint32_t operation GNUNET_PACKED;
- /**
- * For Intersection: my element count
- */
- uint32_t element_count GNUNET_PACKED;
- /**
- * Application-specific identifier of the request.
- */
- struct GNUNET_HashCode app_idX;
- /* rest: optional message */
- };
- /**
- * Message containing buckets of an invertible bloom filter.
- *
- * If an IBF has too many buckets for an IBF message,
- * it is split into multiple messages.
- */
- struct IBFMessage
- {
- /**
- * Type: #GNUNET_MESSAGE_TYPE_SET_UNION_P2P_IBF
- */
- struct GNUNET_MessageHeader header;
- /**
- * Order of the whole ibf, where
- * num_buckets = 2^order
- */
- uint8_t order;
- /**
- * Padding, must be 0.
- */
- uint8_t reserved1;
- /**
- * Padding, must be 0.
- */
- uint16_t reserved2 GNUNET_PACKED;
- /**
- * Offset of the strata in the rest of the message
- */
- uint32_t offset GNUNET_PACKED;
- /**
- * Salt used when hashing elements for this IBF.
- */
- uint32_t salt GNUNET_PACKED;
- /* rest: buckets */
- };
- struct InquiryMessage
- {
- /**
- * Type: #GNUNET_MESSAGE_TYPE_SET_UNION_P2P_IBF
- */
- struct GNUNET_MessageHeader header;
- /**
- * Salt used when hashing elements for this inquiry.
- */
- uint32_t salt GNUNET_PACKED;
- /**
- * Reserved, set to 0.
- */
- uint32_t reserved GNUNET_PACKED;
- /* rest: inquiry IBF keys */
- };
- /**
- * During intersection, the first (and possibly second) message
- * send it the number of elements in the set, to allow the peers
- * to decide who should start with the Bloom filter.
- */
- struct IntersectionElementInfoMessage
- {
- /**
- * Type: #GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_ELEMENT_INFO
- */
- struct GNUNET_MessageHeader header;
- /**
- * mutator used with this bloomfilter.
- */
- uint32_t sender_element_count GNUNET_PACKED;
- };
- /**
- * Bloom filter messages exchanged for set intersection calculation.
- */
- struct BFMessage
- {
- /**
- * Type: #GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_BF
- */
- struct GNUNET_MessageHeader header;
- /**
- * Number of elements the sender still has in the set.
- */
- uint32_t sender_element_count GNUNET_PACKED;
- /**
- * XOR of all hashes over all elements remaining in the set.
- * Used to determine termination.
- */
- struct GNUNET_HashCode element_xor_hash;
- /**
- * Mutator used with this bloomfilter.
- */
- uint32_t sender_mutator GNUNET_PACKED;
- /**
- * Total length of the bloomfilter data.
- */
- uint32_t bloomfilter_total_length GNUNET_PACKED;
- /**
- * Number of bits (k-value) used in encoding the bloomfilter.
- */
- uint32_t bits_per_element GNUNET_PACKED;
- /**
- * rest: the sender's bloomfilter
- */
- };
- /**
- * Last message, send to confirm the final set. Contains the element
- * count as it is possible that the peer determined that we were done
- * by getting the empty set, which in that case also needs to be
- * communicated.
- */
- struct IntersectionDoneMessage
- {
- /**
- * Type: #GNUNET_MESSAGE_TYPE_SET_INTERSECTION_P2P_DONE
- */
- struct GNUNET_MessageHeader header;
- /**
- * Final number of elements in intersection.
- */
- uint32_t final_element_count GNUNET_PACKED;
- /**
- * XOR of all hashes over all elements remaining in the set.
- */
- struct GNUNET_HashCode element_xor_hash;
- };
- /**
- * Strata estimator together with the peer's overall set size.
- */
- struct StrataEstimatorMessage
- {
- /**
- * Type: #GNUNET_MESSAGE_TYPE_SET_UNION_P2P_SE(C)
- */
- struct GNUNET_MessageHeader header;
- uint64_t set_size;
- };
- GNUNET_NETWORK_STRUCT_END
- #endif
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