GNUnet  0.11.x
gnunet_cadet_service.h
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2009-2017 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  */
35 #ifndef GNUNET_CADET_SERVICE_H
36 #define GNUNET_CADET_SERVICE_H
37 
38 #ifdef __cplusplus
39 extern "C" {
40 #if 0 /* keep Emacsens' auto-indent happy */
41 }
42 #endif
43 #endif
44 
45 #include "gnunet_util_lib.h"
47 
51 #define GNUNET_CADET_VERSION 0x00000005
52 
53 
57 struct GNUNET_CADET_Handle;
58 
63 
67 struct GNUNET_CADET_Port;
68 
69 
74 {
76 };
77 
78 
83 {
93  uint32_t cn GNUNET_PACKED;
94 };
95 
108 typedef void *(*GNUNET_CADET_ConnectEventHandler) (
109  void *cls,
110  struct GNUNET_CADET_Channel *channel,
111  const struct GNUNET_PeerIdentity *source);
112 
113 
126  void *cls,
127  const struct GNUNET_CADET_Channel *channel);
128 
129 
145  void *cls,
146  const struct GNUNET_CADET_Channel *channel,
147  int window_size);
148 
149 
156 struct GNUNET_CADET_Handle *
158 
159 
168 void
170 
171 
185 struct GNUNET_CADET_Port *
187  const struct GNUNET_HashCode *port,
189  void *connects_cls,
192  const struct GNUNET_MQ_MessageHandler *handlers);
193 
194 
201 void
203 
204 
225 struct GNUNET_CADET_Channel *
227  void *channel_cls,
228  const struct GNUNET_PeerIdentity *destination,
229  const struct GNUNET_HashCode *port,
232  const struct GNUNET_MQ_MessageHandler *handlers);
233 
234 
244 void
246 
247 
254 struct GNUNET_MQ_Handle *
255 GNUNET_CADET_get_mq (const struct GNUNET_CADET_Channel *channel);
256 
257 
265 void
267 
268 
278 const struct GNUNET_HashCode *
279 GC_u2h (uint32_t port);
280 
282 {
289 };
290 
295 {
299  int yes_no;
300 
304  const struct GNUNET_PeerIdentity peer;
305 };
306 
307 
315 const union GNUNET_CADET_ChannelInfo *
318  ...);
319 
320 
321 /******************************************************************************/
322 /******************** MONITORING /DEBUG API *************************/
323 /******************************************************************************/
324 /* The following calls are not useful for normal CADET operation, but for */
325 /* debug and monitoring of the cadet state. They can be safely ignored. */
326 /* The API can change at any point without notice. */
327 /* Please contact the developer if you consider any of this calls useful for */
328 /* normal cadet applications. */
329 /******************************************************************************/
330 
331 
336 {
340  struct GNUNET_PeerIdentity root;
341 
345  struct GNUNET_PeerIdentity dest;
346 
347  // to be expanded!
348 };
349 
350 
358 typedef void (*GNUNET_CADET_ChannelCB) (
359  void *cls,
360  const struct GNUNET_CADET_ChannelInternals *info);
361 
362 
367 
368 
379  struct GNUNET_PeerIdentity *peer,
380  GNUNET_CADET_ChannelCB callback,
381  void *callback_cls);
382 
383 
390 void *
392 
393 
398 {
402  struct GNUNET_PeerIdentity peer;
403 
408 
412  unsigned int n_paths;
413 
417  unsigned int best_path_length;
418 };
419 
420 
430 typedef void (*GNUNET_CADET_PeersCB) (
431  void *cls,
432  const struct GNUNET_CADET_PeerListEntry *ple);
433 
434 
439 
440 
453  GNUNET_CADET_PeersCB callback,
454  void *callback_cls);
455 
456 
463 void *
465 
466 
471 {
475  struct GNUNET_PeerIdentity peer;
476 
480  unsigned int target_offset;
481 
485  unsigned int path_length;
486 
492  const struct GNUNET_PeerIdentity *path;
493 };
494 
495 
503 typedef void (*GNUNET_CADET_PathCB) (
504  void *cls,
505  const struct GNUNET_CADET_PeerPathDetail *ppd);
506 
507 
511 struct GNUNET_CADET_GetPath;
512 
513 
523 struct GNUNET_CADET_GetPath *
525  const struct GNUNET_PeerIdentity *id,
526  GNUNET_CADET_PathCB callback,
527  void *callback_cls);
528 
529 
536 void *
538 
539 
544 {
548  struct GNUNET_PeerIdentity peer;
549 
553  uint32_t channels;
554 
558  uint32_t connections;
559 
563  uint16_t estate;
564 
568  uint16_t cstate;
569 };
570 
571 
581 typedef void (*GNUNET_CADET_TunnelsCB) (
582  void *cls,
583  const struct GNUNET_CADET_TunnelDetails *td);
584 
585 
590 
591 
604  GNUNET_CADET_TunnelsCB callback,
605  void *callback_cls);
606 
607 
614 void *
616 
617 
618 #if 0 /* keep Emacsens' auto-indent happy */
619 {
620 #endif
621 #ifdef __cplusplus
622 }
623 #endif
624 
625 /* ifndef GNUNET_CADET_SERVICE_H */
626 #endif
627  /* end of group */
629 
630 /* end of gnunet_cadet_service.h */
void(* GNUNET_CADET_PathCB)(void *cls, const struct GNUNET_CADET_PeerPathDetail *ppd)
Method called to retrieve information about a specific path known to the service. ...
void GNUNET_CADET_disconnect(struct GNUNET_CADET_Handle *handle)
Disconnect from the cadet service.
Definition: cadet_api.c:841
void * GNUNET_CADET_list_tunnels_cancel(struct GNUNET_CADET_ListTunnels *lt)
Cancel a monitor request.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
GNUNET_CADET_WindowSizeEventHandler window_changes
Window size change handler.
Definition: cadet_api.c:175
Opaque handle to the service.
Definition: cadet_api.c:38
void *(* GNUNET_CADET_ConnectEventHandler)(void *cls, struct GNUNET_CADET_Channel *channel, const struct GNUNET_PeerIdentity *source)
Method called whenever a peer connects to a port in MQ-based CADET.
const union GNUNET_CADET_ChannelInfo * GNUNET_CADET_channel_get_info(struct GNUNET_CADET_Channel *channel, enum GNUNET_CADET_ChannelInfoOption option,...)
Get information about a channel.
Definition: cadet_api.c:932
void(* GNUNET_CADET_WindowSizeEventHandler)(void *cls, const struct GNUNET_CADET_Channel *channel, int window_size)
Function called whenever an MQ-channel&#39;s transmission window size changes.
void(* GNUNET_CADET_TunnelsCB)(void *cls, const struct GNUNET_CADET_TunnelDetails *td)
Method called to retrieve information about all tunnels in CADET, called once per tunnel...
Internal details about a channel.
uint16_t cstate
What is our connectivity state?
struct GNUNET_CADET_ChannelMonitor * GNUNET_CADET_get_channel(const struct GNUNET_CONFIGURATION_Handle *cfg, struct GNUNET_PeerIdentity *peer, GNUNET_CADET_ChannelCB callback, void *callback_cls)
Request information about channels to peer from the local peer.
Opaque handle to a channel.
Definition: cadet_api.c:80
unsigned int path_length
Number of entries on the path.
struct GNUNET_CADET_PeersLister * GNUNET_CADET_list_peers(const struct GNUNET_CONFIGURATION_Handle *cfg, GNUNET_CADET_PeersCB callback, void *callback_cls)
Request information about peers known to the running cadet service.
void(* GNUNET_CADET_ChannelCB)(void *cls, const struct GNUNET_CADET_ChannelInternals *info)
Method called to retrieve information about a specific channel the cadet peer is aware of...
void * GNUNET_CADET_list_peers_cancel(struct GNUNET_CADET_PeersLister *pl)
Cancel a peer info request.
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:99
unsigned int best_path_length
Length of the shortest path (0 = unknown, 1 = ourselves, 2 = direct neighbour).
struct GNUNET_CADET_Handle * GNUNET_CADET_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the MQ-based cadet service.
Definition: cadet_api.c:976
const struct GNUNET_HashCode * GC_u2h(uint32_t port)
Transitional function to convert an unsigned int port to a hash value.
A 256-bit hashcode.
Details about a tunnel managed by CADET.
struct GNUNET_CADET_GetPath * GNUNET_CADET_get_path(const struct GNUNET_CONFIGURATION_Handle *cfg, const struct GNUNET_PeerIdentity *id, GNUNET_CADET_PathCB callback, void *callback_cls)
Request information about a peer known to the running cadet peer.
struct GNUNET_CADET_Port * GNUNET_CADET_open_port(struct GNUNET_CADET_Handle *h, const struct GNUNET_HashCode *port, GNUNET_CADET_ConnectEventHandler connects, void *connects_cls, GNUNET_CADET_WindowSizeEventHandler window_changes, GNUNET_CADET_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Open a port to receive incomming MQ-based channels.
Definition: cadet_api.c:1010
static struct GNUNET_OS_Process * p
Helper process we started.
Definition: gnunet-qr.c:59
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
GNUNET_CADET_ChannelInfoOption
static char * option
Name of the option.
Definition: gnunet-config.c:38
uint32_t channels
How many channels use the tunnel.
static struct GNUNET_DNS_Handle * handle
Handle to transport service.
void * GNUNET_CADET_get_path_cancel(struct GNUNET_CADET_GetPath *gp)
Cancel gp operation.
A 512-bit hashcode.
Union to retrieve info about a channel.
unsigned int target_offset
Offset of the target peer on the path.
Message handler for a specific message type.
void * connects(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Definition: 010.c:2
int yes_no
GNUNET_YES / GNUNET_NO, for binary flags.
Operation handle.
static GstElement * source
Appsrc instance into which we write data for the pipeline.
void disconnects(void *cls, const struct GNUNET_PeerIdentity *peer)
Definition: 011.c:2
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
int have_tunnel
Do we have a tunnel to this peer?
void * connects_cls
Closure for connects.
Definition: cadet_api.c:170
const struct GNUNET_PeerIdentity * path
Array of PEER_IDs representing all paths to reach the peer.
void * GNUNET_CADET_get_channel_cancel(struct GNUNET_CADET_ChannelMonitor *cm)
Cancel a channel monitor request.
Handle to a message queue.
Definition: mq.c:85
uint16_t estate
What is our encryption state?
struct GNUNET_CADET_ListTunnels * GNUNET_CADET_list_tunnels(const struct GNUNET_CONFIGURATION_Handle *cfg, GNUNET_CADET_TunnelsCB callback, void *callback_cls)
Request information about tunnels of the running cadet peer.
The identity of the host (wraps the signing key of the peer).
Detailed information we return per peer.
void GNUNET_CADET_receive_done(struct GNUNET_CADET_Channel *channel)
Indicate readiness to receive the next message on a channel.
Definition: cadet_api.c:954
struct GNUNET_CADET_Channel * GNUNET_CADET_channel_create(struct GNUNET_CADET_Handle *h, void *channel_cls, const struct GNUNET_PeerIdentity *destination, const struct GNUNET_HashCode *port, GNUNET_CADET_WindowSizeEventHandler window_changes, GNUNET_CADET_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Create a new channel towards a remote peer.
Definition: cadet_api.c:1068
#define GNUNET_PACKED
gcc-ism to get packed structs.
static uint16_t port
Port number.
Definition: gnunet-bcd.c:81
Hash uniquely identifying a connection below a tunnel.
configuration data
Definition: configuration.c:85
void(* GNUNET_CADET_PeersCB)(void *cls, const struct GNUNET_CADET_PeerListEntry *ple)
Method called to retrieve information about all peers in CADET, called once per peer.
Information we return per peer.
GNUNET_CADET_WindowSizeEventHandler window_changes
Window change handler.
Definition: cadet_api.c:123
Number identifying a CADET channel within a tunnel.
Opaque handle to a port.
Definition: cadet_api.c:145
unsigned int n_paths
Number of disjoint known paths to peer.
uint32_t connections
How many connections support the tunnel.
void GNUNET_CADET_close_port(struct GNUNET_CADET_Port *p)
Close a port opened with GNUNET_CADET_open_port.
Definition: cadet_api.c:874
void(* GNUNET_CADET_DisconnectEventHandler)(void *cls, const struct GNUNET_CADET_Channel *channel)
Function called whenever an MQ-channel is destroyed, unless the destruction was requested by GNUNET_C...
struct GNUNET_ShortHashCode connection_of_tunnel
void GNUNET_CADET_channel_destroy(struct GNUNET_CADET_Channel *channel)
Destroy an existing channel.
Definition: cadet_api.c:903
Who is the peer at the other end of the channel.
struct GNUNET_MQ_Handle * GNUNET_CADET_get_mq(const struct GNUNET_CADET_Channel *channel)
Obtain the message queue for a connected channel.
Definition: cadet_api.c:1119