2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @author Bartlomiej Polot
32 #if 0 /* keep Emacsens' auto-indent happy */
39 #define CADET_DEBUG GNUNET_YES
42 #include "gnunet_util_lib.h"
43 #include "gnunet_peer_lib.h"
44 #include "gnunet_core_service.h"
45 #include "gnunet_protocols.h"
46 #include <gnunet_cadet_service.h>
48 /******************************************************************************/
49 /************************** CONSTANTS ******************************/
50 /******************************************************************************/
52 #define GNUNET_CADET_LOCAL_CHANNEL_ID_CLI 0x80000000
53 #define GNUNET_CADET_LOCAL_CHANNEL_ID_SERV 0xB0000000
55 #define HIGH_PID 0xFFFF0000
56 #define LOW_PID 0x0000FFFF
58 #define PID_OVERFLOW(pid, max) (pid > HIGH_PID && max < LOW_PID)
60 /******************************************************************************/
61 /************************** MESSAGES ******************************/
62 /******************************************************************************/
64 GNUNET_NETWORK_STRUCT_BEGIN
67 * Message for a client to register to the service
69 struct GNUNET_CADET_ClientConnect
72 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_CONNECT
74 * Size: sizeof(struct GNUNET_CADET_ClientConnect) +
75 * sizeof(CADET_ApplicationType) * applications +
76 * sizeof(uint16_t) * types
78 struct GNUNET_MessageHeader header;
79 /* uint32_t list_ports[] */
84 * Type for channel numbering.
85 * - Local channel numbers given by the service (incoming) are >= 0xB0000000
86 * - Local channel numbers given by the client (created) are >= 0x80000000
87 * - Global channel numbers are < 0x80000000
89 typedef uint32_t CADET_ChannelNumber;
93 * Message for a client to create and destroy channels.
95 struct GNUNET_CADET_ChannelMessage
98 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_TUNNEL_[CREATE|DESTROY]
100 * Size: sizeof(struct GNUNET_CADET_ChannelMessage)
102 struct GNUNET_MessageHeader header;
105 * ID of a channel controlled by this client.
107 CADET_ChannelNumber channel_id GNUNET_PACKED;
112 struct GNUNET_PeerIdentity peer;
115 * Port of the channel.
117 uint32_t port GNUNET_PACKED;
122 uint32_t opt GNUNET_PACKED;
127 * Message for cadet data traffic.
129 struct GNUNET_CADET_LocalData
132 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA
134 struct GNUNET_MessageHeader header;
139 uint32_t id GNUNET_PACKED;
148 * Message to allow the client send more data to the service
149 * (always service -> client).
151 struct GNUNET_CADET_LocalAck
154 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK
156 struct GNUNET_MessageHeader header;
159 * ID of the channel allowed to send more data.
161 CADET_ChannelNumber channel_id GNUNET_PACKED;
167 * Message to inform the client about channels in the service.
169 struct GNUNET_CADET_LocalInfo
172 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO[_TUNNEL,_PEER]
174 struct GNUNET_MessageHeader header;
177 * ID of the channel allowed to send more data.
179 CADET_ChannelNumber channel_id GNUNET_PACKED;
182 * ID of the owner of the channel (can be local peer).
184 // struct GNUNET_PeerIdentity owner;
187 * ID of the destination of the channel (can be local peer).
189 struct GNUNET_PeerIdentity peer;
194 * Message to inform the client about one of the peers in the service.
196 struct GNUNET_CADET_LocalInfoPeer
199 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER[S]
201 struct GNUNET_MessageHeader header;
206 uint16_t paths GNUNET_PACKED;
209 * Do we have a tunnel toward this peer?
211 int16_t tunnel GNUNET_PACKED;
214 * ID of the destination of the tunnel (can be local peer).
216 struct GNUNET_PeerIdentity destination;
218 /* If type == PEER (no 'S'): GNUNET_PeerIdentity paths[]
219 * (each path ends in destination) */
223 * Message to inform the client about one of the tunnels in the service.
225 struct GNUNET_CADET_LocalInfoTunnel
228 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL[S]
230 struct GNUNET_MessageHeader header;
233 * Number of channels.
235 uint32_t channels GNUNET_PACKED;
238 * ID of the destination of the tunnel (can be local peer).
240 struct GNUNET_PeerIdentity destination;
243 * Number of connections.
245 uint32_t connections GNUNET_PACKED;
250 uint16_t estate GNUNET_PACKED;
255 uint16_t cstate GNUNET_PACKED;
257 /* If TUNNEL (no 'S'): GNUNET_PeerIdentity connection_ids[connections] */
258 /* If TUNNEL (no 'S'): uint32_t channel_ids[channels] */
262 GNUNET_NETWORK_STRUCT_END
267 * @brief Translate a fwd variable into a string representation, for logging.
269 * @param fwd Is FWD? (#GNUNET_YES or #GNUNET_NO)
271 * @return String representing FWD or BCK.
278 * Check if one pid is bigger than other, accounting for overflow.
280 * @param bigger Argument that should be bigger.
281 * @param smaller Argument that should be smaller.
283 * @return True if bigger (arg1) has a higher value than smaller (arg 2).
286 GC_is_pid_bigger (uint32_t bigger, uint32_t smaller);
290 * Get the higher ACK value out of two values, taking in account overflow.
292 * @param a First ACK value.
293 * @param b Second ACK value.
295 * @return Highest ACK value from the two.
298 GC_max_pid (uint32_t a, uint32_t b);
302 * Get the lower ACK value out of two values, taking in account overflow.
304 * @param a First ACK value.
305 * @param b Second ACK value.
307 * @return Lowest ACK value from the two.
310 GC_min_pid (uint32_t a, uint32_t b);
314 * Convert a 256 bit CadetHash into a 512 HashCode to use in GNUNET_h2s,
315 * multihashmap, and other HashCode-based functions.
317 * @param id A 256 bit hash to expand.
319 * @return A HashCode containing the original 256 bit hash right-padded with 0.
321 const struct GNUNET_HashCode *
322 GC_h2hc (const struct GNUNET_CADET_Hash *id);
325 * Get a string from a Cadet Hash (256 bits).
326 * WARNING: Not reentrant (based on GNUNET_h2s).
329 GC_h2s (const struct GNUNET_CADET_Hash *id);
332 * Convert a message type into a string to help debug
334 * FIND: "#define ([^ ]+)[ ]*([0-9]+)"
335 * REPLACE: " case \2: return "\1"; break;"
337 * @param m Message type.
339 * @return Human readable string description.
344 #if 0 /* keep Emacsens' auto-indent happy */