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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_message_recv.h
* @brief GNUnet MESSENGER service
*/
#ifndef GNUNET_SERVICE_MESSENGER_MESSAGE_RECV_H
#define GNUNET_SERVICE_MESSENGER_MESSAGE_RECV_H
#include "platform.h"
#include "gnunet_crypto_lib.h"
#include "gnunet-service-messenger_message_kind.h"
#include "gnunet-service-messenger_member_session.h"
#include "gnunet-service-messenger_tunnel.h"
#include "messenger_api_message.h"
/**
* Handles a received info message to change the current member id to the one generated by
* the host connected to. (all current tunnels will be informed about the id change)
*
* @param[in/out] room Room of the message
* @param[in/out] tunnel Receiving connection
* @param[in] message INFO-Message
* @param[in] hash Hash of the message
* @return #GNUNET_NO to not forward the message
*/
int
recv_message_info (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
/**
* Handles a received peer message to link it to its origin tunnel if the peer identity matches.
* (the peer message and the member id can potentially be linked to the tunnel)
*
* @param[in/out] room Room of the message
* @param[in/out] tunnel Receiving connection
* @param[in] message PEER-Message
* @param[in] hash Hash of the message
* @return #GNUNET_YES to forward the message
*/
int
recv_message_peer (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
/**
* Handles a received request message by checking for the requested message and forwarding it back
* if the message was found.
* (this can also cause this peer to send a new request instead of only forwarding the received one)
*
* @param[in/out] room Room of the message
* @param[in/out] tunnel Receiving connection
* @param[in] message REQUEST-Message
* @param[in] hash Hash of the message
* @return #GNUNET_YES or #GNUNET_NO depending on required forwarding
*/
int
recv_message_request (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
#endif //GNUNET_SERVICE_MESSENGER_MESSAGE_RECV_H
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