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- /*
- This file is part of GNUnet.
- Copyright (C) 2012, 2017 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
- */
- /**
- * @file fs/gnunet-service-fs_cadet.h
- * @brief non-anonymous file-transfer
- * @author Christian Grothoff
- */
- #ifndef GNUNET_SERVICE_FS_CADET_H
- #define GNUNET_SERVICE_FS_CADET_H
- /**
- * Handle for a request that is going out via cadet API.
- */
- struct GSF_CadetRequest;
- /**
- * Function called with a reply from the cadet.
- *
- * @param cls closure
- * @param type type of the block, ANY on error
- * @param expiration expiration time for the block
- * @param data_size number of bytes in @a data, 0 on error
- * @param data reply block data, NULL on error
- */
- typedef void
- (*GSF_CadetReplyProcessor)(void *cls,
- enum GNUNET_BLOCK_Type type,
- struct GNUNET_TIME_Absolute expiration,
- size_t data_size,
- const void *data);
- /**
- * Look for a block by directly contacting a particular peer.
- *
- * @param target peer that should have the block
- * @param query hash to query for the block
- * @param type desired type for the block
- * @param proc function to call with result
- * @param proc_cls closure for @a proc
- * @return handle to cancel the operation
- */
- struct GSF_CadetRequest *
- GSF_cadet_query (const struct GNUNET_PeerIdentity *target,
- const struct GNUNET_HashCode *query,
- enum GNUNET_BLOCK_Type type,
- GSF_CadetReplyProcessor proc,
- void *proc_cls);
- /**
- * Function called on each active cadets to shut them down.
- *
- * @param cls NULL
- * @param key target peer, unused
- * @param value the `struct CadetHandle` to destroy
- * @return #GNUNET_YES (continue to iterate)
- */
- int
- GSF_cadet_release_clients (void *cls,
- const struct GNUNET_PeerIdentity *key,
- void *value);
- /**
- * Cancel an active request; must not be called after 'proc'
- * was calld.
- *
- * @param sr request to cancel
- */
- void
- GSF_cadet_query_cancel (struct GSF_CadetRequest *sr);
- /**
- * Initialize subsystem for non-anonymous file-sharing.
- */
- void
- GSF_cadet_start_server (void);
- /**
- * Shutdown subsystem for non-anonymous file-sharing.
- */
- void
- GSF_cadet_stop_server (void);
- /**
- * Cadet channel for creating outbound channels.
- */
- extern struct GNUNET_CADET_Handle *cadet_handle;
- /**
- * Map from peer identities to 'struct CadetHandles' with cadet
- * channels to those peers.
- */
- extern struct GNUNET_CONTAINER_MultiPeerMap *cadet_map;
- GNUNET_NETWORK_STRUCT_BEGIN
- /**
- * Query from one peer, asking the other for CHK-data.
- */
- struct CadetQueryMessage
- {
- /**
- * Type is GNUNET_MESSAGE_TYPE_FS_CADET_QUERY.
- */
- struct GNUNET_MessageHeader header;
- /**
- * Block type must be DBLOCK or IBLOCK.
- */
- uint32_t type GNUNET_PACKED;
- /**
- * Query hash from CHK (hash of encrypted block).
- */
- struct GNUNET_HashCode query;
- };
- /**
- * Reply to a CadetQueryMessage.
- */
- struct CadetReplyMessage
- {
- /**
- * Type is GNUNET_MESSAGE_TYPE_FS_CADET_REPLY.
- */
- struct GNUNET_MessageHeader header;
- /**
- * Block type must be DBLOCK or IBLOCK.
- */
- uint32_t type GNUNET_PACKED;
- /**
- * Expiration time for the block.
- */
- struct GNUNET_TIME_AbsoluteNBO expiration;
- /* followed by the encrypted block */
- };
- GNUNET_NETWORK_STRUCT_END
- #endif
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