aboutsummaryrefslogtreecommitdiff
path: root/src/multicast/multicast.h
blob: 8a3ca14c8c51f9a4113c3dda8c987d546aaa6181 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
/*
     This file is part of GNUnet.
     Copyright (C) 2012, 2013 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
*/

/**
 * @file multicast/multicast.h
 * @brief multicast IPC messages
 * @author Christian Grothoff
 * @author Gabor X Toth
 */
#ifndef MULTICAST_H
#define MULTICAST_H

#include "platform.h"
#include "gnunet_multicast_service.h"

GNUNET_NETWORK_STRUCT_BEGIN


/**
 * Header of a join request sent to the origin or another member.
 */
struct MulticastJoinRequestMessage
{
  /**
   * Type: GNUNET_MESSAGE_TYPE_MULTICAST_JOIN_REQUEST
   */
  struct GNUNET_MessageHeader header;

  /**
   * Always zero.
   */
  uint32_t reserved;

  /**
   * ECC signature of the rest of the fields of the join request.
   *
   * Signature must match the public key of the joining member.
   */
  struct GNUNET_CRYPTO_EcdsaSignature signature;

  /**
   * Purpose for the signature and size of the signed data.
   */
  struct GNUNET_CRYPTO_EccSignaturePurpose purpose;

  /**
   * Public key of the target group.
   */
  struct GNUNET_CRYPTO_EddsaPublicKey group_pub_key;

  /**
   * Public key of the joining member.
   */
  struct GNUNET_CRYPTO_EcdsaPublicKey member_pub_key;

  /**
   * Peer identity of the joining member.
   */
  struct GNUNET_PeerIdentity peer;

  /* Followed by struct GNUNET_MessageHeader join_message */
};


/**
 * Header of a join decision message sent to a peer requesting join.
 */
struct MulticastJoinDecisionMessage
{
  /**
   * Type: GNUNET_MESSAGE_TYPE_MULTICAST_JOIN_DECISION
   */
  struct GNUNET_MessageHeader header;

  /**
   * #GNUNET_YES    if the peer was admitted
   * #GNUNET_NO     if entry was refused,
   * #GNUNET_SYSERR if the request could not be answered.
   */
  int32_t is_admitted;

  /**
   * Number of relays given.
   */
  uint32_t relay_count;

  /* Followed by relay_count peer identities */

  /* Followed by the join response message */
};


/**
 * Header added to a struct MulticastJoinDecisionMessage
 * when sent between the client and service.
 */
struct MulticastJoinDecisionMessageHeader
{
  /**
   * Type: GNUNET_MESSAGE_TYPE_MULTICAST_JOIN_DECISION
   */
  struct GNUNET_MessageHeader header;

  /**
   * C->S: Peer to send the join decision to.
   * S->C: Peer we received the join decision from.
   */
  struct GNUNET_PeerIdentity peer;

  /**
   * C->S: Public key of the member requesting join.
   * S->C: Unused.
   */
  struct GNUNET_CRYPTO_EcdsaPublicKey member_pub_key;

  /* Followed by struct MulticastJoinDecisionMessage */
};


/**
 * Message sent from the client to the service to notify the service
 * about the result of a membership test.
 */
struct MulticastMembershipTestResultMessage
{
  /**
   * Type: GNUNET_MESSAGE_TYPE_MULTICAST_MEMBERSHIP_TEST_RESULT
   */
  struct GNUNET_MessageHeader header;

  /**
   * Unique ID that identifies the associated membership test.
   */
  uint32_t uid;

  /**
   * #GNUNET_YES    if the peer is a member
   * #GNUNET_NO     if peer is not a member,
   * #GNUNET_SYSERR if the test could not be answered.
   */
  int32_t is_admitted;
};


/**
 * Message sent from the client to the service OR the service to the
 * client asking for a message fragment to be replayed.
 */
struct MulticastReplayRequestMessage
{

  /**
   * The message type should be
   * #GNUNET_MESSAGE_TYPE_MULTICAST_REPLAY_REQUEST.
   */
  struct GNUNET_MessageHeader header;

  /**
   * S->C: Public key of the member requesting replay.
   * C->S: Unused.
   */
  struct GNUNET_CRYPTO_EcdsaPublicKey member_pub_key;

  /**
   * ID of the message that is being requested.
   */
  uint64_t fragment_id;

  /**
   * ID of the message that is being requested.
   */
  uint64_t message_id;

  /**
   * Offset of the fragment that is being requested.
   */
  uint64_t fragment_offset;

  /**
   * Additional flags for the request.
   */
  uint64_t flags;

  /**
   * Replay request ID.
   */
  uint32_t uid;
};


/**
 * Message sent from the client to the service to give the service
 * a replayed message.
 */
struct MulticastReplayResponseMessage
{

  /**
   * Type: GNUNET_MESSAGE_TYPE_MULTICAST_REPLAY_RESPONSE
   *    or GNUNET_MESSAGE_TYPE_MULTICAST_REPLAY_RESPONSE_END
   */
  struct GNUNET_MessageHeader header;

  /**
   * ID of the message that is being requested.
   */
  uint64_t fragment_id;

  /**
   * ID of the message that is being requested.
   */
  uint64_t message_id;

  /**
   * Offset of the fragment that is being requested.
   */
  uint64_t fragment_offset;

  /**
   * Additional flags for the request.
   */
  uint64_t flags;

  /**
   * An `enum GNUNET_MULTICAST_ReplayErrorCode` identifying issues (in NBO).
   */
  int32_t error_code;

  /* followed by replayed message */
};


/**
 * Message sent from the client to the service to notify the service
 * about the starting of a multicast group with this peers as its origin.
 */
struct MulticastOriginStartMessage
{
  /**
   * Type: GNUNET_MESSAGE_TYPE_MULTICAST_ORIGIN_START
   */
  struct GNUNET_MessageHeader header;

  /**
   * Always zero.
   */
  uint32_t reserved;

  /**
   * Private, non-ephemeral key for the multicast group.
   */
  struct GNUNET_CRYPTO_EddsaPrivateKey group_key;

  /**
   * Last fragment ID sent to the group, used to continue counting fragments if
   * we resume operating * a group.
   */
  uint64_t max_fragment_id;
};


struct MulticastMemberJoinMessage
{
  /**
   * Type: GNUNET_MESSAGE_TYPE_MULTICAST_MEMBER_JOIN
   */
  struct GNUNET_MessageHeader header;

  uint32_t relay_count GNUNET_PACKED;

  struct GNUNET_CRYPTO_EddsaPublicKey group_pub_key;

  struct GNUNET_CRYPTO_EcdsaPrivateKey member_key;

  struct GNUNET_PeerIdentity origin;

  /* Followed by struct GNUNET_PeerIdentity relays[relay_count] */

  /* Followed by struct GNUNET_MessageHeader join_msg */
};


GNUNET_NETWORK_STRUCT_END

#endif
/* end of multicast.h */