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Diffstat (limited to 'src/messenger/gnunet-service-messenger_message_recv.c')
-rw-r--r--src/messenger/gnunet-service-messenger_message_recv.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/src/messenger/gnunet-service-messenger_message_recv.c b/src/messenger/gnunet-service-messenger_message_recv.c
new file mode 100644
index 000000000..aa28a36ea
--- /dev/null
+++ b/src/messenger/gnunet-service-messenger_message_recv.c
@@ -0,0 +1,204 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2020 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_recv.c
23 * @brief GNUnet MESSENGER service
24 */
25
26#include "gnunet-service-messenger_message_recv.h"
27#include "gnunet-service-messenger_message_handle.h"
28
29void
30recv_message_info (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
31 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
32{
33 int conflict = GNUNET_CONTAINER_multishortmap_contains (room->members, &(message->body.info.unique_id));
34
35 if (GNUNET_NO == conflict)
36 {
37 struct GNUNET_MESSENGER_Message *sync_message = create_message_id (&(message->body.info.unique_id));
38 struct GNUNET_HashCode sync_hash;
39
40 send_room_message_ext (room, room->host, sync_message, &sync_hash, tunnel);
41 destroy_message (sync_message);
42
43 switch_room_member_id (room, get_room_host_id (room), &(message->body.info.unique_id), NULL);
44
45 change_room_host_id (room, &(message->body.info.unique_id));
46 }
47
48 if (!tunnel->contact_id)
49 tunnel->contact_id = GNUNET_new(struct GNUNET_ShortHashCode);
50
51 GNUNET_memcpy(tunnel->contact_id, &(message->header.sender_id), sizeof(struct GNUNET_ShortHashCode));
52
53 struct GNUNET_ShortHashCode original_id;
54
55 if (GNUNET_YES == conflict)
56 {
57 GNUNET_memcpy(&original_id, get_room_host_id (room), sizeof(struct GNUNET_ShortHashCode));
58
59 change_room_host_id (room, &(message->body.info.unique_id));
60 }
61
62 {
63 struct GNUNET_MESSENGER_Message *join_message = create_message_join (room->host->ego);
64 struct GNUNET_HashCode join_hash;
65
66 send_tunnel_message (tunnel, room->host, join_message, &join_hash);
67 destroy_message (join_message);
68 }
69
70 if ((GNUNET_YES == conflict) && (0 != GNUNET_memcmp(&original_id, get_room_host_id (room))))
71 {
72 struct GNUNET_MESSENGER_Message *sync_message = create_message_id (&original_id);
73 struct GNUNET_HashCode sync_hash;
74
75 send_tunnel_message (tunnel, room->host, sync_message, &sync_hash);
76 destroy_message (sync_message);
77 }
78}
79
80struct GNUNET_MESSENGER_MemberInfoSpread
81{
82 struct GNUNET_MESSENGER_SrvRoom *room;
83 struct GNUNET_MESSENGER_SrvTunnel *tunnel;
84};
85
86static int
87iterate_send_member_infos (void *cls, const struct GNUNET_ShortHashCode *key, void *value)
88{
89 struct GNUNET_MESSENGER_MemberInfo *info = value;
90 struct GNUNET_MESSENGER_MemberInfoSpread *spread = cls;
91
92 struct GNUNET_MESSENGER_ListMessage *element = info->session_messages.head;
93
94 while (element)
95 {
96 const struct GNUNET_MESSENGER_Message *message = get_room_message (spread->room, spread->room->host,
97 &(element->hash), GNUNET_NO);
98
99 if (message)
100 forward_tunnel_message (spread->tunnel, message, &(element->hash));
101
102 element = element->next;
103 }
104
105 return GNUNET_YES;
106}
107
108void
109recv_message_join (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
110 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
111{
112 const struct GNUNET_MESSENGER_Message *info_msg = get_room_message (room, room->host, &(message->header.previous),
113 GNUNET_NO);
114
115 if ((info_msg) && (0 == GNUNET_memcmp(&(info_msg->header.sender_id), get_room_host_id (room)))
116 && (GNUNET_MESSENGER_KIND_INFO == info_msg->header.kind))
117 {
118 struct GNUNET_MESSENGER_MemberInfoSpread spread;
119
120 spread.room = room;
121
122 if ((tunnel) && (tunnel->contact_id) && (0 == GNUNET_memcmp(tunnel->contact_id, &(message->header.sender_id))))
123 spread.tunnel = tunnel;
124 else
125 spread.tunnel = find_room_tunnel_to (room, &(message->header.sender_id));
126
127 if (spread.tunnel)
128 GNUNET_CONTAINER_multishortmap_iterate (room->member_infos, iterate_send_member_infos, &spread);
129 }
130
131 handle_message_join (room, tunnel, message, hash);
132}
133
134void
135recv_message_leave (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
136 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
137{
138 handle_message_leave (room, tunnel, message, hash);
139}
140
141void
142recv_message_name (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
143 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
144{
145 handle_message_name (room, tunnel, message, hash);
146}
147
148void
149recv_message_key (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
150 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
151{
152 handle_message_key (room, tunnel, message, hash);
153}
154
155void
156recv_message_peer (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
157 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
158{
159 struct GNUNET_PeerIdentity peer;
160 GNUNET_PEER_resolve (tunnel->peer, &peer);
161
162 if (0 == GNUNET_memcmp(&peer, &(message->body.peer.peer)))
163 {
164 if (!tunnel->peer_message)
165 tunnel->peer_message = GNUNET_new(struct GNUNET_HashCode);
166
167 GNUNET_memcpy(tunnel->peer_message, hash, sizeof(struct GNUNET_HashCode));
168
169 if (!tunnel->contact_id)
170 tunnel->contact_id = GNUNET_new(struct GNUNET_ShortHashCode);
171
172 GNUNET_memcpy(tunnel->contact_id, &(message->header.sender_id), sizeof(struct GNUNET_ShortHashCode));
173 }
174
175 handle_message_peer (room, tunnel, message, hash);
176}
177
178void
179recv_message_id (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
180 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
181{
182 if ((tunnel->contact_id) && (0 == GNUNET_memcmp(tunnel->contact_id, &(message->header.sender_id))))
183 GNUNET_memcpy(tunnel->contact_id, &(message->body.id.id), sizeof(struct GNUNET_ShortHashCode));
184
185 handle_message_id (room, tunnel, message, hash);
186}
187
188void
189recv_message_miss (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
190 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
191{
192 handle_message_miss (room, tunnel, message, hash);
193}
194
195void
196recv_message_request (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvTunnel *tunnel,
197 struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
198{
199 const struct GNUNET_MESSENGER_Message *msg = get_room_message (room, room->host, &(message->body.request.hash),
200 GNUNET_NO);
201
202 if (msg)
203 forward_tunnel_message (tunnel, msg, &(message->body.request.hash));
204}