1 files changed, 267 insertions, 0 deletions

diff --git a/src/seti/seti.h b/src/seti/seti.h
new file mode 100644
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--- /dev/null
+++ b/src/seti/seti.h
@@ -0,0 +1,267 @@
+/*
+     This file is part of GNUnet.
+     Copyright (C) 2012-2014, 2020 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 set/seti.h
+ * @brief messages used for the set intersection api
+ * @author Florian Dold
+ * @author Christian Grothoff
+ */
+#ifndef SETI_H
+#define SETI_H
+
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_set_service.h"
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Message sent by the client to the service to ask starting
+ * a new set to perform operations with.
+ */
+struct GNUNET_SETI_CreateMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_CREATE
+   */
+  struct GNUNET_MessageHeader header;
+};
+
+
+/**
+ * Message sent by the client to the service to start listening for
+ * incoming requests to perform a certain type of set operation for a
+ * certain type of application.
+ */
+struct GNUNET_SETI_ListenMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_LISTEN
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Operation type, values of `enum GNUNET_SETI_OperationType`
+   */
+  uint32_t operation GNUNET_PACKED;
+
+  /**
+   * application id
+   */
+  struct GNUNET_HashCode app_id;
+};
+
+
+/**
+ * Message sent by a listening client to the service to accept
+ * performing the operation with the other peer.
+ */
+struct GNUNET_SETI_AcceptMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_ACCEPT
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * ID of the incoming request we want to accept.
+   */
+  uint32_t accept_reject_id GNUNET_PACKED;
+
+  /**
+   * Request ID to identify responses.
+   */
+  uint32_t request_id GNUNET_PACKED;
+
+  /**
+   * Return the intersection (1), instead of the elements to
+   * remove / the delta (0), in NBO.
+   */
+  uint32_t return_intersection;
+
+};
+
+
+/**
+ * Message sent by a listening client to the service to reject
+ * performing the operation with the other peer.
+ */
+struct GNUNET_SETI_RejectMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_REJECT
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * ID of the incoming request we want to reject.
+   */
+  uint32_t accept_reject_id GNUNET_PACKED;
+};
+
+
+/**
+ * A request for an operation with another client.
+ */
+struct GNUNET_SETI_RequestMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_REQUEST.
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * ID of the to identify the request when accepting or
+   * rejecting it.
+   */
+  uint32_t accept_id GNUNET_PACKED;
+
+  /**
+   * Identity of the requesting peer.
+   */
+  struct GNUNET_PeerIdentity peer_id;
+
+  /* rest: context message, that is, application-specific
+     message to convince listener to pick up */
+};
+
+
+/**
+ * Message sent by client to service to initiate a set operation as a
+ * client (not as listener).  A set (which determines the operation
+ * type) must already exist in association with this client.
+ */
+struct GNUNET_SETI_EvaluateMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_EVALUATE
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Id of our set to evaluate, chosen implicitly by the client when it
+   * calls #GNUNET_SETI_commit().
+   */
+  uint32_t request_id GNUNET_PACKED;
+
+  /**
+   * Peer to evaluate the operation with
+   */
+  struct GNUNET_PeerIdentity target_peer;
+
+  /**
+   * Application id
+   */
+  struct GNUNET_HashCode app_id;
+
+  /**
+   * Return the intersection (1), instead of the elements to
+   * remove / the delta (0), in NBO.
+   */
+  uint32_t return_intersection;
+
+  /* rest: context message, that is, application-specific
+     message to convince listener to pick up */
+};
+
+
+/**
+ * Message sent by the service to the client to indicate an
+ * element that is removed (set intersection) or added
+ * (set union) or part of the final result, depending on
+ * options specified for the operation.
+ */
+struct GNUNET_SETI_ResultMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_RESULT
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Current set size.
+   */
+  uint64_t current_size;
+
+  /**
+   * id the result belongs to
+   */
+  uint32_t request_id GNUNET_PACKED;
+
+  /**
+   * Was the evaluation successful? Contains
+   * an `enum GNUNET_SETI_Status` in NBO.
+   */
+  uint16_t result_status GNUNET_PACKED;
+
+  /**
+   * Type of the element attachted to the message, if any.
+   */
+  uint16_t element_type GNUNET_PACKED;
+
+  /* rest: the actual element */
+};
+
+
+/**
+ * Message sent by client to the service to add an element to the set.
+ */
+struct GNUNET_SETI_ElementMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_ADD.
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * Type of the element to add or remove.
+   */
+  uint16_t element_type GNUNET_PACKED;
+
+  /**
+   * For alignment, always zero.
+   */
+  uint16_t reserved GNUNET_PACKED;
+
+  /* rest: the actual element */
+};
+
+
+/**
+ * Sent to the service by the client
+ * in order to cancel a set operation.
+ */
+struct GNUNET_SETI_CancelMessage
+{
+  /**
+   * Type: #GNUNET_MESSAGE_TYPE_SETI_CANCEL
+   */
+  struct GNUNET_MessageHeader header;
+
+  /**
+   * ID of the request we want to cancel.
+   */
+  uint32_t request_id GNUNET_PACKED;
+};
+
+
+GNUNET_NETWORK_STRUCT_END
+
+#endif