2 This file is part of GNUnet.
3 Copyright (C) 2001 - 2011 GNUnet e.V.
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., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, 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
68 * Message for a client to create and destroy channels.
70 struct GNUNET_CADET_PortMessage
73 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_[OPEN|CLOSE]
75 * Size: sizeof(struct GNUNET_CADET_ChannelMessage)
77 struct GNUNET_MessageHeader header;
82 struct GNUNET_HashCode port GNUNET_PACKED;
86 * Type for channel numbering.
87 * - Local channel numbers given by the service (incoming) are >= 0xB0000000
88 * - Local channel numbers given by the client (created) are >= 0x80000000
89 * - Global channel numbers are < 0x80000000
91 typedef uint32_t CADET_ChannelNumber;
95 * Message for a client to create channels.
97 struct GNUNET_CADET_ChannelCreateMessage
100 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_TUNNEL_CREATE
102 * Size: sizeof(struct GNUNET_CADET_ChannelCreateMessage)
104 struct GNUNET_MessageHeader header;
107 * ID of a channel controlled by this client.
109 CADET_ChannelNumber channel_id GNUNET_PACKED;
114 struct GNUNET_PeerIdentity peer;
117 * Port of the channel.
119 struct GNUNET_HashCode port;
124 uint32_t opt GNUNET_PACKED;
129 * Message for a client to destroy channels.
131 struct GNUNET_CADET_ChannelDestroyMessage
134 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_TUNNEL_DESTROY
136 * Size: sizeof(struct GNUNET_CADET_ChannelDestroyMessage)
138 struct GNUNET_MessageHeader header;
141 * ID of a channel controlled by this client.
143 CADET_ChannelNumber channel_id GNUNET_PACKED;
148 * Message for cadet data traffic.
150 struct GNUNET_CADET_LocalData
153 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA
155 struct GNUNET_MessageHeader header;
160 uint32_t id GNUNET_PACKED;
169 * Message to allow the client send more data to the service
170 * (always service -> client).
172 struct GNUNET_CADET_LocalAck
175 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK
177 struct GNUNET_MessageHeader header;
180 * ID of the channel allowed to send more data.
182 CADET_ChannelNumber channel_id GNUNET_PACKED;
188 * Message to inform the client about channels in the service.
190 struct GNUNET_CADET_LocalInfo
193 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO[_TUNNEL,_PEER]
195 struct GNUNET_MessageHeader header;
198 * ID of the channel allowed to send more data.
200 CADET_ChannelNumber channel_id GNUNET_PACKED;
203 * ID of the owner of the channel (can be local peer).
205 // struct GNUNET_PeerIdentity owner;
208 * ID of the destination of the channel (can be local peer).
210 struct GNUNET_PeerIdentity peer;
215 * Message to inform the client about one of the peers in the service.
217 struct GNUNET_CADET_LocalInfoPeer
220 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER[S]
222 struct GNUNET_MessageHeader header;
227 uint16_t paths GNUNET_PACKED;
230 * Do we have a tunnel toward this peer?
232 int16_t tunnel GNUNET_PACKED;
235 * ID of the peer (can be local peer).
237 struct GNUNET_PeerIdentity destination;
239 /* If type == PEER (no 'S'): GNUNET_PeerIdentity paths[]
240 * (each path ends in destination) */
244 * Message to inform the client about one of the tunnels in the service.
246 struct GNUNET_CADET_LocalInfoTunnel
249 * Type: GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL[S]
251 struct GNUNET_MessageHeader header;
254 * Number of channels.
256 uint32_t channels GNUNET_PACKED;
259 * ID of the destination of the tunnel (can be local peer).
261 struct GNUNET_PeerIdentity destination;
264 * Number of connections.
266 uint32_t connections GNUNET_PACKED;
271 uint16_t estate GNUNET_PACKED;
276 uint16_t cstate GNUNET_PACKED;
278 /* If TUNNEL (no 'S'): GNUNET_PeerIdentity connection_ids[connections] */
279 /* If TUNNEL (no 'S'): uint32_t channel_ids[channels] */
283 GNUNET_NETWORK_STRUCT_END
287 * @brief Translate a fwd variable into a string representation, for logging.
289 * @param fwd Is FWD? (#GNUNET_YES or #GNUNET_NO)
291 * @return String representing FWD or BCK.
298 * Check if one pid is bigger than other, accounting for overflow.
300 * @param bigger Argument that should be bigger.
301 * @param smaller Argument that should be smaller.
303 * @return True if bigger (arg1) has a higher value than smaller (arg 2).
306 GC_is_pid_bigger (uint32_t bigger, uint32_t smaller);
310 * Get the higher ACK value out of two values, taking in account overflow.
312 * @param a First ACK value.
313 * @param b Second ACK value.
315 * @return Highest ACK value from the two.
318 GC_max_pid (uint32_t a, uint32_t b);
322 * Get the lower ACK value out of two values, taking in account overflow.
324 * @param a First ACK value.
325 * @param b Second ACK value.
327 * @return Lowest ACK value from the two.
330 GC_min_pid (uint32_t a, uint32_t b);
334 * Convert a 256 bit CadetHash into a 512 HashCode to use in GNUNET_h2s,
335 * multihashmap, and other HashCode-based functions.
337 * @param id A 256 bit hash to expand.
339 * @return A HashCode containing the original 256 bit hash right-padded with 0.
341 const struct GNUNET_HashCode *
342 GC_h2hc (const struct GNUNET_CADET_Hash *id);
345 * Get a string from a Cadet Hash (256 bits).
346 * WARNING: Not reentrant (based on GNUNET_h2s).
349 GC_h2s (const struct GNUNET_CADET_Hash *id);
353 * Allocate a string with a hexdump of any binary data.
355 * @param bin Arbitrary binary data.
356 * @param len Length of @a bin in bytes.
357 * @param output Where to write the output (if *output be NULL it's allocated).
359 * @return The size of the output.
362 GC_bin2s (void *bin, unsigned int len, char **output);
365 * Convert a message type into a string to help debug
367 * FIND: "#define ([^ ]+)[ ]*([0-9]+)"
368 * REPLACE: " case \2: return "\1"; break;"
370 * @param m Message type.
372 * @return Human readable string description.
377 #if 0 /* keep Emacsens' auto-indent happy */