GNUnet  0.11.x
Data Structures | Macros | Functions
transport_api2_application.c File Reference

enable clients to ask TRANSPORT about establishing connections to peers More...

#include "platform.h"
#include "gnunet_transport_application_service.h"
#include "gnunet_transport_core_service.h"
#include "transport.h"
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Data Structures

struct  GNUNET_TRANSPORT_ApplicationSuggestHandle
 Handle for TRANSPORT address suggestion requests. More...
 
struct  GNUNET_TRANSPORT_ApplicationHandle
 Handle to the TRANSPORT subsystem for application management. More...
 

Macros

#define LOG(kind, ...)   GNUNET_log_from (kind, "transport-application-api", __VA_ARGS__)
 

Functions

static void reconnect (struct GNUNET_TRANSPORT_ApplicationHandle *ch)
 Re-establish the connection to the TRANSPORT service. More...
 
static void reconnect_task (void *cls)
 Re-establish the connection to the TRANSPORT service. More...
 
static void force_reconnect (struct GNUNET_TRANSPORT_ApplicationHandle *ch)
 Disconnect from TRANSPORT and then reconnect. More...
 
static void error_handler (void *cls, enum GNUNET_MQ_Error error)
 We encountered an error handling the MQ to the TRANSPORT service. More...
 
static int transmit_suggestion (void *cls, const struct GNUNET_PeerIdentity *peer, void *value)
 Transmit request for an address suggestion. More...
 
struct GNUNET_TRANSPORT_ApplicationHandleGNUNET_TRANSPORT_application_init (const struct GNUNET_CONFIGURATION_Handle *cfg)
 Initialize the TRANSPORT application suggestion client handle. More...
 
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. More...
 
void GNUNET_TRANSPORT_application_done (struct GNUNET_TRANSPORT_ApplicationHandle *ch)
 Client is done with TRANSPORT application management, release resources. More...
 
struct GNUNET_TRANSPORT_ApplicationSuggestHandleGNUNET_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. More...
 
void GNUNET_TRANSPORT_application_suggest_cancel (struct GNUNET_TRANSPORT_ApplicationSuggestHandle *sh)
 We no longer care about being connected to a peer. More...
 
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 wants TRANSPORT to validate that the address is correct. More...
 

Detailed Description

enable clients to ask TRANSPORT about establishing connections to peers

Author
Christian Grothoff
Matthias Wachs

Definition in file transport_api2_application.c.

Macro Definition Documentation

◆ LOG

#define LOG (   kind,
  ... 
)    GNUNET_log_from (kind, "transport-application-api", __VA_ARGS__)

Function Documentation

◆ reconnect()

static void reconnect ( struct GNUNET_TRANSPORT_ApplicationHandle ch)
static

Re-establish the connection to the TRANSPORT service.

Parameters
chhandle to use to re-connect.

Definition at line 194 of file transport_api2_application.c.

References GNUNET_TRANSPORT_ApplicationHandle::cfg, error_handler(), force_reconnect(), GNUNET_assert, GNUNET_CLIENT_connect(), GNUNET_CONTAINER_multipeermap_iterate(), GNUNET_TRANSPORT_ApplicationHandle::mq, GNUNET_TRANSPORT_ApplicationHandle::sug_requests, and transmit_suggestion().

Referenced by GNUNET_TRANSPORT_application_init(), and reconnect_task().

195 {
196  static const struct GNUNET_MQ_MessageHandler handlers[] = { { NULL, 0, 0 } };
197 
198  GNUNET_assert (NULL == ch->mq);
199  ch->mq =
200  GNUNET_CLIENT_connect (ch->cfg, "transport", handlers, &error_handler, ch);
201  if (NULL == ch->mq)
202  {
203  force_reconnect (ch);
204  return;
205  }
208  ch);
209 }
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:1057
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_CONTAINER_MultiPeerMap * sug_requests
Map with the identities of all the peers for which we would like to have address suggestions.
static void force_reconnect(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Disconnect from TRANSPORT and then reconnect.
static int transmit_suggestion(void *cls, const struct GNUNET_PeerIdentity *peer, void *value)
Transmit request for an address suggestion.
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
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.
Message handler for a specific message type.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
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◆ reconnect_task()

static void reconnect_task ( void *  cls)
static

Re-establish the connection to the TRANSPORT service.

Parameters
clshandle to use to re-connect.

Definition at line 112 of file transport_api2_application.c.

References GNUNET_TRANSPORT_ApplicationSuggestHandle::ch, reconnect(), and GNUNET_TRANSPORT_ApplicationHandle::task.

Referenced by force_reconnect().

113 {
115 
116  ch->task = NULL;
117  reconnect (ch);
118 }
static struct GNUNET_CADET_Channel * ch
Channel handle.
Definition: gnunet-cadet.c:117
struct GNUNET_SCHEDULER_Task * task
Task to trigger reconnect.
static void reconnect(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Re-establish the connection to the TRANSPORT service.
Handle to the TRANSPORT subsystem for application management.
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◆ force_reconnect()

static void force_reconnect ( struct GNUNET_TRANSPORT_ApplicationHandle ch)
static

Disconnect from TRANSPORT and then reconnect.

Parameters
chour handle

Definition at line 127 of file transport_api2_application.c.

References GNUNET_TRANSPORT_ApplicationHandle::backoff, GNUNET_MQ_destroy(), GNUNET_SCHEDULER_add_delayed(), GNUNET_TIME_STD_BACKOFF, GNUNET_TRANSPORT_ApplicationHandle::mq, reconnect_task(), and GNUNET_TRANSPORT_ApplicationHandle::task.

Referenced by error_handler(), and reconnect().

128 {
129  if (NULL != ch->mq)
130  {
131  GNUNET_MQ_destroy (ch->mq);
132  ch->mq = NULL;
133  }
136 }
struct GNUNET_TIME_Relative backoff
Reconnect backoff delay.
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:1253
static void reconnect_task(void *cls)
Re-establish the connection to the TRANSPORT service.
struct GNUNET_MQ_Handle * mq
Message queue for sending requests to the TRANSPORT service.
#define GNUNET_TIME_STD_BACKOFF(r)
Perform our standard exponential back-off calculation, starting at 1 ms and then going by a factor of...
struct GNUNET_SCHEDULER_Task * task
Task to trigger reconnect.
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:824
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◆ error_handler()

static void error_handler ( void *  cls,
enum GNUNET_MQ_Error  error 
)
static

We encountered an error handling the MQ to the TRANSPORT service.

Reconnect.

Parameters
clsthe struct GNUNET_TRANSPORT_ApplicationHandle
errordetails about the error

Definition at line 147 of file transport_api2_application.c.

References GNUNET_TRANSPORT_ApplicationSuggestHandle::ch, force_reconnect(), GNUNET_ERROR_TYPE_DEBUG, and LOG.

Referenced by reconnect().

148 {
150 
152  "TRANSPORT connection died (code %d), reconnecting\n",
153  (int) error);
154  force_reconnect (ch);
155 }
static struct GNUNET_CADET_Channel * ch
Channel handle.
Definition: gnunet-cadet.c:117
#define LOG(kind,...)
static void force_reconnect(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Disconnect from TRANSPORT and then reconnect.
Handle to the TRANSPORT subsystem for application management.
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◆ transmit_suggestion()

static int transmit_suggestion ( void *  cls,
const struct GNUNET_PeerIdentity peer,
void *  value 
)
static

Transmit request for an address suggestion.

Parameters
clsthe struct GNUNET_TRANSPORT_ApplicationHandle
peerpeer to ask for an address suggestion for
valuethe struct GNUNET_TRANSPORT_SuggestHandle
Returns
GNUNET_OK (continue to iterate), GNUNET_SYSERR on failure (message queue no longer exists)

Definition at line 168 of file transport_api2_application.c.

References GNUNET_TRANSPORT_ApplicationSuggestHandle::bw, GNUNET_TRANSPORT_ApplicationSuggestHandle::ch, GNUNET_MESSAGE_TYPE_TRANSPORT_SUGGEST, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_OK, GNUNET_SYSERR, m, GNUNET_TRANSPORT_ApplicationHandle::mq, peer, GNUNET_TRANSPORT_ApplicationSuggestHandle::pk, sh, and value.

Referenced by GNUNET_TRANSPORT_application_suggest(), and reconnect().

171 {
174  struct GNUNET_MQ_Envelope *ev;
175  struct ExpressPreferenceMessage *m;
176 
177  if (NULL == ch->mq)
178  return GNUNET_SYSERR;
180  m->pk = htonl ((uint32_t) sh->pk);
181  m->bw = sh->bw;
182  m->peer = *peer;
183  GNUNET_MQ_send (ch->mq, ev);
184  return GNUNET_OK;
185 }
static struct GNUNET_CADET_Channel * ch
Channel handle.
Definition: gnunet-cadet.c:117
Handle for TRANSPORT address suggestion requests.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
enum GNUNET_MQ_PriorityPreferences pk
What preference is being expressed?
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:104
static char * value
Value of the record to add/remove.
struct GNUNET_MQ_Handle * mq
Message queue for sending requests to the TRANSPORT service.
static struct SolverHandle * sh
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
#define GNUNET_MESSAGE_TYPE_TRANSPORT_SUGGEST
Type of the 'struct ExpressPreferenceMessage' send by clients to TRANSPORT to establish bandwidth pre...
struct GNUNET_BANDWIDTH_Value32NBO bw
How much bandwidth does the client expect?
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:353
Handle to the TRANSPORT subsystem for application management.
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◆ free_sug_handle()

static int free_sug_handle ( void *  cls,
const struct GNUNET_PeerIdentity key,
void *  value 
)
static

Function called to free all struct GNUNET_TRANSPORT_ApplicationSuggestHandles in the map.

Parameters
clsNULL
keythe key
valuethe value to free
Returns
GNUNET_OK (continue to iterate)

Definition at line 242 of file transport_api2_application.c.

References GNUNET_free, GNUNET_OK, and value.

Referenced by GNUNET_TRANSPORT_application_done().

243 {
245 
246  GNUNET_free (cur);
247  return GNUNET_OK;
248 }
Handle for TRANSPORT address suggestion requests.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
static char * value
Value of the record to add/remove.
#define GNUNET_free(ptr)
Wrapper around free.
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