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/*
This file is part of GNUnet.
Copyright (C) 2020--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_service.h
* @brief GNUnet MESSENGER service
*/
#ifndef GNUNET_SERVICE_MESSENGER_SERVICE_H
#define GNUNET_SERVICE_MESSENGER_SERVICE_H
#include "platform.h"
#include "gnunet_configuration_lib.h"
#include "gnunet_util_lib.h"
#include "gnunet_identity_service.h"
#include "gnunet-service-messenger_ego_store.h"
#include "gnunet-service-messenger_list_handles.h"
#include "messenger_api_contact_store.h"
#include "gnunet-service-messenger_room.h"
#include "gnunet-service-messenger_member_session.h"
struct GNUNET_MESSENGER_Service
{
const struct GNUNET_CONFIGURATION_Handle *config;
struct GNUNET_SERVICE_Handle *service;
struct GNUNET_SCHEDULER_Task *shutdown;
char *dir;
struct GNUNET_CADET_Handle *cadet;
struct GNUNET_MESSENGER_EgoStore ego_store;
struct GNUNET_MESSENGER_ContactStore contact_store;
struct GNUNET_MESSENGER_ListHandles handles;
struct GNUNET_CONTAINER_MultiHashMap *rooms;
};
/**
* Creates and allocates a new service using a given <i>config</i> and a GNUnet service handle.
*
* @param[in] config Configuration
* @param[in,out] service_handle GNUnet service handle
* @return New service
*/
struct GNUNET_MESSENGER_Service*
create_service (const struct GNUNET_CONFIGURATION_Handle *config,
struct GNUNET_SERVICE_Handle *service_handle);
/**
* Destroys a <i>service</i> and frees its memory fully.
*
* @param[in,out] service Service
*/
void
destroy_service (struct GNUNET_MESSENGER_Service *service);
/**
* Returns the used EGO-store of a given <i>service</i>.
*
* @param[in,out] service Service
* @return EGO-store
*/
struct GNUNET_MESSENGER_EgoStore*
get_service_ego_store (struct GNUNET_MESSENGER_Service *service);
/**
* Returns the used contact store of a given <i>service</i>.
*
* @param[in,out] service Service
* @return Contact store
*/
struct GNUNET_MESSENGER_ContactStore*
get_service_contact_store (struct GNUNET_MESSENGER_Service *service);
/**
* Creates and adds a new handle to a <i>service</i> using a given message queue.
*
* @param[in,out] service Service
* @param[in,out] mq Message queue
* @return New handle
*/
struct GNUNET_MESSENGER_SrvHandle*
add_service_handle (struct GNUNET_MESSENGER_Service *service,
struct GNUNET_MQ_Handle *mq);
/**
* Removes a <i>handle</i> from a <i>service</i> and destroys it.
*
* @param[in,out] service Service
* @param[in,out] handle Handle
*/
void
remove_service_handle (struct GNUNET_MESSENGER_Service *service,
struct GNUNET_MESSENGER_SrvHandle *handle);
/**
* Tries to write the peer identity of the peer running a <i>service</i> on to the <i>peer</i>
* parameter. The functions returns #GNUNET_OK on success, otherwise #GNUNET_SYSERR.
*
* @param[in] service Service
* @param[out] peer Peer identity
* @return #GNUNET_OK on success, otherwise #GNUNET_SYSERR
*/
int
get_service_peer_identity (const struct GNUNET_MESSENGER_Service *service,
struct GNUNET_PeerIdentity *peer);
/**
* Returns the room identified by a given <i>key</i> for a <i>service</i>. If the service doesn't know any room
* using the given key, NULL gets returned.
*
* @param[in] service Service
* @param[in] key Key of room
* @return Room or NULL
*/
struct GNUNET_MESSENGER_SrvRoom*
get_service_room (const struct GNUNET_MESSENGER_Service *service,
const struct GNUNET_HashCode *key);
/**
* Tries to open a room using a given <i>key</i> for a <i>service</i> by a specific <i>handle</i>. The room will be
* created if necessary. If the function is successful, it returns #GNUNET_YES, otherwise #GNUNET_NO.
*
* @param[in,out] service Service
* @param[in,out] handle Handle
* @param[in] key Key of room
* @return #GNUNET_YES on success, otherwise #GNUNET_NO
*/
int
open_service_room (struct GNUNET_MESSENGER_Service *service,
struct GNUNET_MESSENGER_SrvHandle *handle,
const struct GNUNET_HashCode *key);
/**
* Tries to enter a room using a given <i>key</i> for a <i>service</i> by a specific <i>handle</i>. The room will
* be created if necessary. If the function is successful, it returns #GNUNET_YES, otherwise #GNUNET_NO.
*
* The room will be entered through the peer identitied by the peer identity provided as <i>door</i> parameter and
* a new connection will be made.
*
* @param[in,out] service Service
* @param[in,out] handle Handle
* @param[in] door Peer identity
* @param[in] key Key of room
* @return #GNUNET_YES on success, otherwise #GNUNET_NO
*/
int
entry_service_room (struct GNUNET_MESSENGER_Service *service,
struct GNUNET_MESSENGER_SrvHandle *handle,
const struct GNUNET_PeerIdentity *door,
const struct GNUNET_HashCode *key);
/**
* Tries to close a room using a given <i>key</i> for a <i>service</i> by a specific <i>handle</i>. The room will
* be created if necessary. If the function is successful, it returns #GNUNET_YES, otherwise #GNUNET_NO.
*
* If the specific handle is currently the host of the room for this service, a new handle which is a member will
* take its place. Otherwise the room will be destroyed for this service.
*
* @param[in,out] service Service
* @param[in,out] handle Handle
* @param[in] key Key of room
* @return #GNUNET_YES on success, otherwise #GNUNET_NO
*/
int
close_service_room (struct GNUNET_MESSENGER_Service *service,
struct GNUNET_MESSENGER_SrvHandle *handle,
const struct GNUNET_HashCode *key);
/**
* Sends a received or sent <i>message</i> with a given <i>hash</i> to each handle of a <i>service</i> which
* is currently member of a specific <i>room</i> for handling it in the client API.
*
* @param[in,out] service Service
* @param[in,out] room Room
* @param[in] session Member session
* @param[in] message Message
* @param[in] hash Hash of message
*/
void
handle_service_message (struct GNUNET_MESSENGER_Service *service,
struct GNUNET_MESSENGER_SrvRoom *room,
const struct GNUNET_MESSENGER_MemberSession *session,
const struct GNUNET_MESSENGER_Message *message,
const struct GNUNET_HashCode *hash);
#endif //GNUNET_SERVICE_MESSENGER_SERVICE_H
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