GNUnet  0.10.x
transport_api2_application.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2010--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"
29 #include "transport.h"
30 
31 
32 #define LOG(kind, ...) \
33  GNUNET_log_from(kind, "transport-application-api", __VA_ARGS__)
34 
35 
44 
49 
54 
59 };
60 
61 
70 
77 
82 
87 
92 };
93 
94 
100 static void
102 
103 
109 static void
110 reconnect_task(void *cls)
111 {
113 
114  ch->task = NULL;
115  reconnect(ch);
116 }
117 
118 
124 static void
126 {
127  if (NULL != ch->mq)
128  {
129  GNUNET_MQ_destroy(ch->mq);
130  ch->mq = NULL;
131  }
134 }
135 
136 
144 static void
145 error_handler(void *cls, enum GNUNET_MQ_Error error)
146 {
148 
150  "TRANSPORT connection died (code %d), reconnecting\n",
151  (int)error);
152  force_reconnect(ch);
153 }
154 
155 
165 static int
167  const struct GNUNET_PeerIdentity *peer,
168  void *value)
169 {
172  struct GNUNET_MQ_Envelope *ev;
173  struct ExpressPreferenceMessage *m;
174 
175  if (NULL == ch->mq)
176  return GNUNET_SYSERR;
178  m->pk = htonl((uint32_t)sh->pk);
179  m->bw = sh->bw;
180  m->peer = *peer;
181  GNUNET_MQ_send(ch->mq, ev);
182  return GNUNET_OK;
183 }
184 
185 
191 static void
193 {
194  static const struct GNUNET_MQ_MessageHandler handlers[] = { { NULL, 0, 0 } };
195 
196  GNUNET_assert(NULL == ch->mq);
197  ch->mq =
198  GNUNET_CLIENT_connect(ch->cfg, "transport", handlers, &error_handler, ch);
199  if (NULL == ch->mq)
200  {
201  force_reconnect(ch);
202  return;
203  }
206  ch);
207 }
208 
209 
218  const struct GNUNET_CONFIGURATION_Handle *cfg)
219 {
221 
223  ch->cfg = cfg;
225  reconnect(ch);
226  return ch;
227 }
228 
229 
239 static int
240 free_sug_handle(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
241 {
243 
244  GNUNET_free(cur);
245  return GNUNET_OK;
246 }
247 
248 
254 void
257 {
258  if (NULL != ch->mq)
259  {
260  GNUNET_MQ_destroy(ch->mq);
261  ch->mq = NULL;
262  }
263  if (NULL != ch->task)
264  {
266  ch->task = NULL;
267  }
270  NULL);
272  GNUNET_free(ch);
273 }
274 
275 
289  const struct GNUNET_PeerIdentity *peer,
291  struct GNUNET_BANDWIDTH_Value32NBO bw)
292 {
294 
296  s->ch = ch;
297  s->id = *peer;
298  s->pk = pk;
299  s->bw = bw;
301  ch->sug_requests,
302  &s->id,
303  s,
306  "Requesting TRANSPORT to suggest address for `%s'\n",
307  GNUNET_i2s(peer));
308  if (NULL == ch->mq)
309  return s;
311  return s;
312 }
313 
314 
320 void
323 {
325  struct GNUNET_MQ_Envelope *ev;
326  struct ExpressPreferenceMessage *m;
327 
329  "Telling TRANSPORT we no longer care for an address for `%s'\n",
330  GNUNET_i2s(&sh->id));
332  GNUNET_OK ==
334  if (NULL == ch->mq)
335  {
336  GNUNET_free(sh);
337  return;
338  }
340  m->pk = htonl((uint32_t)sh->pk);
341  m->bw = sh->bw;
342  m->peer = sh->id;
343  GNUNET_MQ_send(ch->mq, ev);
344  GNUNET_free(sh);
345 }
346 
347 
363 void
366  const struct GNUNET_PeerIdentity *peer,
367  enum GNUNET_NetworkType nt,
368  const char *addr)
369 {
370  struct GNUNET_MQ_Envelope *ev;
371  struct RequestHelloValidationMessage *m;
372  size_t alen;
373 
374  if (NULL == ch->mq)
375  {
376  GNUNET_log(
378  "Address validation for %s:%s skipped as transport is not connected\n",
379  GNUNET_i2s(peer),
380  addr);
381  return;
382  }
383  alen = strlen(addr) + 1;
384  ev =
386  alen,
388  m->peer = *peer;
389  m->nt = htonl((uint32_t)nt);
390  memcpy(&m[1], addr, alen);
391  GNUNET_MQ_send(ch->mq, ev);
392 }
393 
394 
395 /* end of transport_api2_application.c */
common internal definitions for transport service
static struct GNUNET_TIME_Relative backoff
How long should we wait to reconnect?
Definition: resolver_api.c:81
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
struct GNUNET_TRANSPORT_ApplicationHandle * ch
Connecitivity handle this suggestion handle belongs to.
GNUNET_MQ_Error
Error codes for the queue.
void GNUNET_TRANSPORT_application_validate(struct GNUNET_TRANSPORT_ApplicationHandle *ch, const struct GNUNET_PeerIdentity *peer, enum GNUNET_NetworkType nt, const char *addr)
An application (or a communicator) has received a HELLO (or other address data of another peer) and w...
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
Bandwidth allocation API for applications to interact with.
Handle for TRANSPORT address suggestion requests.
void GNUNET_TRANSPORT_application_suggest_cancel(struct GNUNET_TRANSPORT_ApplicationSuggestHandle *sh)
We no longer care about being connected to a peer.
struct GNUNET_CONTAINER_MultiPeerMap * sug_requests
Map with the identities of all the peers for which we would like to have address suggestions.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
int GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
GNUNET_MQ_PriorityPreferences
Per envelope preferences and priorities.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define LOG(kind,...)
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
static void force_reconnect(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Disconnect from TRANSPORT and then reconnect.
enum GNUNET_MQ_PriorityPreferences pk
What preference is being expressed?
void GNUNET_TRANSPORT_application_done(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Client is done with TRANSPORT application management, release resources.
GNUNET_NetworkType
Types of networks (with separate quotas) we support.
Definition: gnunet_nt_lib.h:35
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
struct GNUNET_TRANSPORT_ApplicationSuggestHandle * GNUNET_TRANSPORT_application_suggest(struct GNUNET_TRANSPORT_ApplicationHandle *ch, const struct GNUNET_PeerIdentity *peer, enum GNUNET_MQ_PriorityPreferences pk, struct GNUNET_BANDWIDTH_Value32NBO bw)
An application would like TRANSPORT to connect to a peer.
uint32_t pk
What type of performance preference does the client have? A enum GNUNET_MQ_PreferenceKind in NBO...
Definition: ats2.h:121
static int free_sug_handle(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Function called to free all struct GNUNET_TRANSPORT_ApplicationSuggestHandles in the map...
struct GNUNET_TIME_Relative backoff
Reconnect backoff delay.
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:99
#define GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_HELLO_VALIDATION
Type of the &#39;struct RequestHelloValidationMessage&#39; send by clients to TRANSPORT to trigger validation...
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
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
static int transmit_suggestion(void *cls, const struct GNUNET_PeerIdentity *peer, void *value)
Transmit request for an address suggestion.
static void reconnect_task(void *cls)
Re-establish the connection to the TRANSPORT service.
static char * value
Value of the record to add/remove.
const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
struct GNUNET_MQ_Handle * mq
Message queue for sending requests to the TRANSPORT service.
static void error_handler(void *cls, enum GNUNET_MQ_Error error)
We encountered an error handling the MQ to the TRANSPORT service.
#define GNUNET_MESSAGE_TYPE_TRANSPORT_SUGGEST_CANCEL
Type of the &#39;struct ExpressPreferenceMessage&#39; send by clients to TRANSPORT to abandon bandwidth prefe...
static struct SolverHandle * sh
Internal representation of the hash map.
Message handler for a specific message type.
static struct GNUNET_NAT_AUTO_Test * nt
Handle to a NAT test operation.
static struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
Definition: gnunet-arm.c:104
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct GNUNET_HashCode key
The key used in the DHT.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
#define GNUNET_TIME_STD_BACKOFF(r)
Perform our standard exponential back-off calculation, starting at 1 ms and then going by a factor of...
32-bit bandwidth used for network exchange by GNUnet, in bytes per second.
struct GNUNET_PeerIdentity id
ID of the peer for which address suggestion was requested.
Allow multiple values with the same key.
Handle to a message queue.
Definition: mq.c:84
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
The identity of the host (wraps the signing key of the peer).
#define GNUNET_MESSAGE_TYPE_TRANSPORT_SUGGEST
Type of the &#39;struct ExpressPreferenceMessage&#39; send by clients to TRANSPORT to establish bandwidth pre...
struct GNUNET_TRANSPORT_ApplicationHandle * GNUNET_TRANSPORT_application_init(const struct GNUNET_CONFIGURATION_Handle *cfg)
Initialize the TRANSPORT application suggestion client handle.
configuration data
Definition: configuration.c:83
struct GNUNET_SCHEDULER_Task * task
Task to trigger reconnect.
#define GNUNET_log(kind,...)
Entry in list of pending tasks.
Definition: scheduler.c:131
struct GNUNET_BANDWIDTH_Value32NBO bw
How much bandwidth does the client expect?
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:821
#define GNUNET_YES
Definition: gnunet_common.h:77
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
struct GNUNET_BANDWIDTH_Value32NBO bw
How much bandwidth in bytes/second does the application expect?
Definition: ats2.h:131
static void reconnect(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Re-establish the connection to the TRANSPORT service.
Application client to ATS service: we would like to have address suggestions for this peer...
Definition: ats2.h:109
Handle to the TRANSPORT subsystem for application management.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_free(ptr)
Wrapper around free.
Time for relative time used by GNUnet, in microseconds.
struct GNUNET_PeerIdentity peer
Peer to get address suggestions for.
Definition: ats2.h:126
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:956