GNUnet  0.10.x
cadet_api_list_tunnels.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2011, 2017, 2019 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  */
26 #include "platform.h"
27 #include "gnunet_util_lib.h"
28 #include "gnunet_constants.h"
29 #include "gnunet_cadet_service.h"
30 #include "cadet.h"
31 #include "cadet_protocol.h"
32 
33 
42 
47 
52 
57 
62 
67 };
68 
69 
76 static void
78  const struct GNUNET_CADET_LocalInfoTunnel *info)
79 {
80  struct GNUNET_CADET_ListTunnels *lt = cls;
82 
83  td.peer = info->destination;
84  td.channels = ntohl(info->channels);
85  td.connections = ntohl(info->connections);
86  td.estate = ntohs(info->estate);
87  td.cstate = ntohs(info->cstate);
88  lt->tunnels_cb(lt->tunnels_cb_cls,
89  &td);
90 }
91 
92 
99 static void
101  const struct GNUNET_MessageHeader *msg)
102 {
103  struct GNUNET_CADET_ListTunnels *lt = cls;
104 
105  (void)msg;
106 
107  lt->tunnels_cb(lt->tunnels_cb_cls,
108  NULL);
110 }
111 
112 
118 static void
119 reconnect(void *cls);
120 
121 
128 static void
129 error_handler(void *cls,
130  enum GNUNET_MQ_Error error)
131 {
132  struct GNUNET_CADET_ListTunnels *lt = cls;
133 
134  GNUNET_MQ_destroy(lt->mq);
135  lt->mq = NULL;
139  &reconnect,
140  lt);
141 }
142 
143 
149 static void
150 reconnect(void *cls)
151 {
152  struct GNUNET_CADET_ListTunnels *lt = cls;
153  struct GNUNET_MQ_MessageHandler handlers[] = {
157  lt),
158  GNUNET_MQ_hd_fixed_size(get_tunnels_end,
160  struct GNUNET_MessageHeader,
161  lt),
163  };
164  struct GNUNET_MessageHeader *msg;
165  struct GNUNET_MQ_Envelope *env;
166 
167  lt->reconnect_task = NULL;
168  lt->mq = GNUNET_CLIENT_connect(lt->cfg,
169  "cadet",
170  handlers,
171  &error_handler,
172  lt);
173  if (NULL == lt->mq)
174  return;
175  env = GNUNET_MQ_msg(msg,
177  GNUNET_MQ_send(lt->mq,
178  env);
179 }
180 
181 
194  GNUNET_CADET_TunnelsCB callback,
195  void *callback_cls)
196 {
197  struct GNUNET_CADET_ListTunnels *lt;
198 
199  if (NULL == callback)
200  {
201  GNUNET_break(0);
202  return NULL;
203  }
205  lt->tunnels_cb = callback;
206  lt->tunnels_cb_cls = callback_cls;
207  lt->cfg = cfg;
208  reconnect(lt);
209  if (NULL == lt->mq)
210  {
211  GNUNET_free(lt);
212  return NULL;
213  }
214  return lt;
215 }
216 
217 
224 void *
226 {
227  void *ret = lt->tunnels_cb_cls;
228 
229  if (NULL != lt->mq)
230  GNUNET_MQ_destroy(lt->mq);
231  if (NULL != lt->reconnect_task)
233  GNUNET_free(lt);
234  return ret;
235 }
236 
237 
238 /* end of cadet_api_list_tunnels.c */
uint16_t cstate
Connection state.
Definition: cadet.h:391
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
void * GNUNET_CADET_list_tunnels_cancel(struct GNUNET_CADET_ListTunnels *lt)
Cancel a monitor request.
struct GNUNET_MQ_Handle * GNUNET_CLIENT_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *service_name, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *error_handler_cls)
Create a message queue to connect to a GNUnet service.
Definition: client.c:900
static void error_handler(void *cls, enum GNUNET_MQ_Error error)
Function called on connection trouble.
GNUNET_MQ_Error
Error codes for the queue.
#define GNUNET_TIME_UNIT_MINUTES
One minute.
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...
static void get_tunnels(void *cls)
Call CADET&#39;s meta API, get all tunnels known to a peer.
Definition: gnunet-cadet.c:619
struct GNUNET_MQ_Handle * mq
Message queue to talk to CADET service.
struct GNUNET_PeerIdentity destination
ID of the destination of the tunnel (can be local peer).
Definition: cadet.h:376
uint16_t cstate
What is our connectivity state?
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS
Local information about all tunnels of service.
static int ret
Final status code.
Definition: gnunet-arm.c:89
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
struct GNUNET_PeerIdentity peer
Target of the tunnel.
Details about a tunnel managed by CADET.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1237
void * tunnels_cb_cls
Info callback closure for tunnels_cb.
static void handle_get_tunnels_end(void *cls, const struct GNUNET_MessageHeader *msg)
Process a local reply about info on all tunnels, pass info to the user.
uint32_t channels
How many channels use the tunnel.
Message to inform the client about one of the tunnels in the service.
Definition: cadet.h:361
Message handler for a specific message type.
static void handle_get_tunnels(void *cls, const struct GNUNET_CADET_LocalInfoTunnel *info)
Process a local reply about info on all tunnels, pass info to the user.
#define GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS_END
End of local information about all tunnels of service.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
uint32_t connections
Number of connections.
Definition: cadet.h:381
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we use.
#define GNUNET_MESSAGE_TYPE_CADET_LOCAL_REQUEST_INFO_TUNNELS
Request local information about all tunnels of service.
P2P messages used by CADET.
uint32_t channels
Number of channels.
Definition: cadet.h:371
Handle to a message queue.
Definition: mq.c:84
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.
uint16_t estate
Encryption state.
Definition: cadet.h:386
struct GNUNET_TIME_Relative backoff
Backoff for reconnect attempts.
static void reconnect(void *cls)
Reconnect to the service and try again.
configuration data
Definition: configuration.c:83
Entry in list of pending tasks.
Definition: scheduler.c:131
struct GNUNET_SCHEDULER_Task * reconnect_task
Task to reconnect.
uint32_t connections
How many connections support the tunnel.
Header for all communications.
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:821
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:351
GNUNET_CADET_TunnelsCB tunnels_cb
Monitor callback.
struct GNUNET_TIME_Relative GNUNET_TIME_randomized_backoff(struct GNUNET_TIME_Relative rt, struct GNUNET_TIME_Relative threshold)
Randomized exponential back-off, starting at 1 ms and going up by a factor of 2+r, where 0 <= r <= 0.5, up to a maximum of the given threshold.
Definition: time.c:758
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_free(ptr)
Wrapper around free.
Time for relative time used by GNUnet, in microseconds.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:956