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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2020--2021 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20/**
21 * @author Tobias Frisch
22 * @file src/messenger/gnunet-service-messenger_message_handle.h
23 * @brief GNUnet MESSENGER service
24 */
25
26#ifndef GNUNET_SERVICE_MESSENGER_MESSAGE_HANDLE_H
27#define GNUNET_SERVICE_MESSENGER_MESSAGE_HANDLE_H
28
29#include "platform.h"
30#include "gnunet_crypto_lib.h"
31
32#include "gnunet-service-messenger_message_kind.h"
33
34#include "gnunet-service-messenger_member_session.h"
35#include "gnunet-service-messenger_tunnel.h"
36#include "messenger_api_message.h"
37
38/**
39 * Handles a received or sent join message to make changes of current member information.
40 * (add matching member and clear member info)
41 *
42 * @param[in/out] room Room of the message
43 * @param[in/out] session Member session
44 * @param[in] message JOIN-Message
45 * @param[in] hash Hash of the message
46 */
47void
48handle_message_join (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
49 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
50
51/**
52 * Handles a received or sent leave message to make changes of current member information.
53 * (remove matching member and clear member info)
54 *
55 * @param[in/out] room Room of the message
56 * @param[in/out] session Member session
57 * @param[in] message LEAVE-Message
58 * @param[in] hash Hash of the message
59 */
60void
61handle_message_leave (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
62 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
63
64/**
65 * Handles a received or sent name message to rename a current member.
66 * (change name of matching member)
67 *
68 * @param[in/out] room Room of the message
69 * @param[in/out] session Member session
70 * @param[in] message NAME-Message
71 * @param[in] hash Hash of the message
72 */
73void
74handle_message_name (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
75 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
76
77/**
78 * Handles a received or sent key message to change the key of a member and rearrange the contacts accordingly.
79 * (move the member in the contacts and change its key)
80 *
81 * @param[in/out] room Room of the message
82 * @param[in/out] session Member session
83 * @param[in] message KEY-Message
84 * @param[in] hash Hash of the message
85 */
86void
87handle_message_key (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
88 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
89
90/**
91 * Handles a received or sent peer message to make changes of the basement in the room.
92 * (add a new peer to the basement and restructure connections based on updated list of peers)
93 *
94 * @param[in/out] room Room of the message
95 * @param[in/out] session Member session
96 * @param[in] message PEER-Message
97 * @param[in] hash Hash of the message
98 */
99void
100handle_message_peer (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
101 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
102
103/**
104 * Handles a received or sent id message to change a members id.
105 * (change id of matching member)
106 *
107 * @param[in/out] room Room of the message
108 * @param[in/out] session Member session
109 * @param[in] message ID-Message
110 * @param[in] hash Hash of the message
111 */
112void
113handle_message_id (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
114 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
115
116/**
117 * Handles a received or sent miss message to drop a peer from the basement in the room.
118 * (remove a peer from the basement and restructure connections based on updated list of peers)
119 *
120 * @param[in/out] room Room of the message
121 * @param[in/out] session Member session
122 * @param[in] message MISS-Message
123 * @param[in] hash Hash of the message
124 */
125void
126handle_message_miss (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
127 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
128
129/**
130 * Handles a received or sent delete message to delete a specific message from the store.
131 * (remove a message from the store of a room under a given delay)
132 *
133 * @param[in/out] room Room of the message
134 * @param[in/out] session Member session
135 * @param[in] message DELETE-Message
136 * @param[in] hash Hash of the message
137 */
138void
139handle_message_delete (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_MemberSession *session,
140 const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash);
141
142#endif //GNUNET_SERVICE_MESSENGER_MESSAGE_HANDLE_H