-added core functionality of the messenger service

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

formatting messenger code

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-completed core functionality of messenger service

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-code cleanup and reuse

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

+added structure to memberships of rooms

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-implemented member permission checks and deletion of messages

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-moved solving requests out of updating last messages (also forward before update)

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-reduced complexity of permisson check and changed load/save of rooms

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-added save/load for accessed keys and basement peers of a room

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-implemented save/load for members with their history and session

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-abstracted management of egos and contacts

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fix warning

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-abstracted management of members

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed and adjusted test case

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-separated handling of direct and anonymous contacts

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-messenger added member-sessions which fix multiple edge cases, also additional cleanup

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-updated docs and fixed memory leak

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-changed info messages and added protocol version exchange

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-adjusted client api to use contacts from sessions

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-added more logging and fixed wrong session usage

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-adjusted comm0 test case and removed adding members from checking messages

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed test-case for peer exchange

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-getting multiple peers connected in test-case with cadet

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed wrong assert and added tunnel version check

-simplified handling and forwarding

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed merging last messages and cycling info messages

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-automated adding sessions and members

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-corrected use of identity keys and signatures

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-adding local joining on entering external room

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed test-case comm0

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-added more test-cases with generic setup

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed multiple simultaneous channels blocking each other

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-making test-cases more precise

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-added check of members in test-cases, reduced merge messages

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-unified delayed operations: requests, deletions and merges

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-finished handling of operations

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed member session historystorage, added request permission check and padding for transmission

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-improved padding and removed automatic recursive requests

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-implemented filter for sending messages and added private messages to API level

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-wrong setups fixed with proper ego lookups

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-fixed problem with anonymous ego and changed to discrete-level padding

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-added links to replace deleted messages, added local deletion and fixed anonymous id changing

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

-added session completion and removal through completion process

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

1 files changed, 129 insertions, 0 deletions

diff --git a/src/messenger/gnunet-service-messenger_operation.h b/src/messenger/gnunet-service-messenger_operation.h
new file mode 100644
index 000000000..7757b8e88
--- /dev/null
+++ b/src/messenger/gnunet-service-messenger_operation.h
@@ -0,0 +1,129 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2021 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 Tobias Frisch
+ * @file src/messenger/gnunet-service-messenger_operation.h
+ * @brief GNUnet MESSENGER service
+ */
+
+#ifndef GNUNET_SERVICE_MESSENGER_OPERATION_H
+#define GNUNET_SERVICE_MESSENGER_OPERATION_H
+
+#include "platform.h"
+#include "gnunet_configuration_lib.h"
+#include "gnunet_crypto_lib.h"
+#include "gnunet_scheduler_lib.h"
+#include "gnunet_strings_lib.h"
+#include "gnunet_time_lib.h"
+
+enum GNUNET_MESSENGER_OperationType
+{
+  GNUNET_MESSENGER_OP_REQUEST = 1,
+  GNUNET_MESSENGER_OP_DELETE = 2,
+  GNUNET_MESSENGER_OP_MERGE = 3,
+
+  GNUNET_MESSENGER_OP_UNKNOWN = 0
+};
+
+struct GNUNET_MESSENGER_OperationStore;
+
+struct GNUNET_MESSENGER_Operation
+{
+  enum GNUNET_MESSENGER_OperationType type;
+
+  struct GNUNET_HashCode hash;
+  struct GNUNET_TIME_Absolute timestamp;
+
+  struct GNUNET_MESSENGER_OperationStore *store;
+  struct GNUNET_SCHEDULER_Task* task;
+};
+
+/**
+ * Creates and allocates a new operation under a given <i>hash</i>.
+ *
+ * @param[in] hash Hash of message
+ */
+struct GNUNET_MESSENGER_Operation*
+create_operation (const struct GNUNET_HashCode *hash);
+
+/**
+ * Destroys an operation and frees its memory fully.
+ *
+ * @param[in/out] op Operation
+ */
+void
+destroy_operation (struct GNUNET_MESSENGER_Operation *op);
+
+/**
+ * Loads data from a configuration file at a selected <i>path</i> into
+ * a new allocated and created operation for a specific operation
+ * <i>store</i> if the required information could be read successfully.
+ *
+ * The method will return the new operation and it will be started
+ * automatically to match its timestamp of execution.
+ *
+ * If the method fails to restore any valid operation from the file,
+ * NULL gets returned instead.
+ *
+ * @param[in/out] store Operation store
+ * @param[in] path Path of a configuration file
+ */
+struct GNUNET_MESSENGER_Operation*
+load_operation (struct GNUNET_MESSENGER_OperationStore *store, const char *path);
+
+/**
+ * Saves data from an <i>operation</i> into a configuration file at a
+ * selected <i>path</i> which can be load to restore the operation
+ * completely and continue its process.
+ *
+ * @param[in] op Operation
+ * @param[in] path Path of a configuration file
+ */
+void
+save_operation (const struct GNUNET_MESSENGER_Operation *op, const char *path);
+
+/**
+ * Starts an inactive operation with a given <i>delay</i> in a
+ * specific operation <i>store</i>. The method will replace the
+ * operations type to process it correctly. An opeation can't be
+ * started twice, it has to be stopped or fully processed first.
+ *
+ * @param[in/out] op Operation
+ * @param[in] type Type of operation
+ * @param[in/out] store Operation store
+ * @param[in] delay Delay
+ * @return #GNUNET_OK on success, otherwise #GNUNET_SYSERR
+ */
+int
+start_operation (struct GNUNET_MESSENGER_Operation *op,
+                 enum GNUNET_MESSENGER_OperationType type,
+                 struct GNUNET_MESSENGER_OperationStore *store,
+                 struct GNUNET_TIME_Relative delay);
+
+/**
+ * Stops an active operation and resets its type to be
+ * #GNUNET_MESSENGER_OP_UNKNOWN.
+ *
+ * @return #GNUNET_OK on success, otherwise #GNUNET_SYSERR
+ */
+int
+stop_operation (struct GNUNET_MESSENGER_Operation *op);
+
+#endif //GNUNET_SERVICE_MESSENGER_OPERATION_H