GNUnet 0.22.0
transport_api2_application.c File Reference

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

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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__)

Definition at line 32 of file transport_api2_application.c.

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.

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 {
204 return;
205 }
208 ch);
209}
struct GNUNET_MQ_MessageHandlers handlers[]
Definition: 003.c:1
static struct GNUNET_CADET_Channel * ch
Channel handle.
Definition: gnunet-cadet.c:117
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:1060
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_MQ_Handle * mq
Message Queue for the channel (which we are implementing).
Definition: cadet.h:142
Message handler for a specific message type.
static void force_reconnect(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Disconnect from TRANSPORT and then reconnect.
static void error_handler(void *cls, enum GNUNET_MQ_Error error)
We encountered an error handling the MQ to the TRANSPORT service.
static int transmit_suggestion(void *cls, const struct GNUNET_PeerIdentity *peer, void *value)
Transmit request for an address suggestion.

References ch, error_handler(), force_reconnect(), GNUNET_assert, GNUNET_CLIENT_connect(), GNUNET_CONTAINER_multipeermap_iterate(), handlers, GNUNET_CADET_Channel::mq, and transmit_suggestion().

Referenced by GNUNET_TRANSPORT_application_init(), and reconnect_task().

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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.

113{
115
116 ch->task = NULL;
117 reconnect (ch);
118}
Handle to the TRANSPORT subsystem for application management.
static void reconnect(struct GNUNET_TRANSPORT_ApplicationHandle *ch)
Re-establish the connection to the TRANSPORT service.

References ch, and reconnect().

Referenced by force_reconnect().

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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.

128{
129 if (NULL != ch->mq)
130 {
132 ch->mq = NULL;
133 }
134 ch->backoff = GNUNET_TIME_STD_BACKOFF (ch->backoff);
135 ch->task = GNUNET_SCHEDULER_add_delayed (ch->backoff, &reconnect_task, ch);
136}
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:700
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:1276
#define GNUNET_TIME_STD_BACKOFF(r)
Perform our standard exponential back-off calculation, starting at 1 ms and then going by a factor of...
static void reconnect_task(void *cls)
Re-establish the connection to the TRANSPORT service.

References ch, GNUNET_MQ_destroy(), GNUNET_SCHEDULER_add_delayed(), GNUNET_TIME_STD_BACKOFF, GNUNET_CADET_Channel::mq, and reconnect_task().

Referenced by error_handler(), and reconnect().

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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.

148{
150
152 "TRANSPORT connection died (code %d), reconnecting\n",
153 (int) error);
155}
@ GNUNET_ERROR_TYPE_DEBUG
#define LOG(kind,...)

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

Referenced by reconnect().

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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.

171{
174 struct GNUNET_MQ_Envelope *ev;
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_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:103
static struct GNUNET_IDENTITY_Handle * sh
Handle to IDENTITY service.
static char * value
Value of the record to add/remove.
@ GNUNET_OK
@ GNUNET_SYSERR
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:305
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:78
#define GNUNET_MESSAGE_TYPE_TRANSPORT_SUGGEST
Type of the 'struct ExpressPreferenceMessage' send by clients to TRANSPORT to establish bandwidth pre...
Application client to TRANSPORT service: we would like to have address suggestions for this peer.
Definition: transport.h:806
struct GNUNET_PeerIdentity peer
Peer to get address suggestions for.
Definition: transport.h:823
Handle for TRANSPORT address suggestion requests.

References ch, GNUNET_MESSAGE_TYPE_TRANSPORT_SUGGEST, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_OK, GNUNET_SYSERR, m, GNUNET_CADET_Channel::mq, ExpressPreferenceMessage::peer, sh, and value.

Referenced by GNUNET_TRANSPORT_application_suggest(), and reconnect().

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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.

243{
245
246 GNUNET_free (cur);
247 return GNUNET_OK;
248}
#define GNUNET_free(ptr)
Wrapper around free.

References GNUNET_free, GNUNET_OK, and value.

Referenced by GNUNET_TRANSPORT_application_done().

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