1 files changed, 168 insertions, 0 deletions

diff --git a/src/service/fs/gnunet-service-fs_cadet.h b/src/service/fs/gnunet-service-fs_cadet.h
new file mode 100644
index 000000000..c02021a0d
--- /dev/null
+++ b/src/service/fs/gnunet-service-fs_cadet.h
@@ -0,0 +1,168 @@
+/*
+     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 called.
+ *
+ * @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