GNUnet  0.11.x
Data Structures | Functions
cadet_api_list_peers.c File Reference

cadet api: client implementation of cadet service More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_constants.h"
#include "gnunet_cadet_service.h"
#include "cadet.h"
#include "cadet_protocol.h"
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Data Structures

struct  GNUNET_CADET_PeersLister
 Operation handle. More...
 

Functions

static void handle_get_peers (void *cls, const struct GNUNET_CADET_LocalInfoPeers *info)
 Process a local reply about info on all tunnels, pass info to the user. More...
 
static void handle_get_peers_end (void *cls, const struct GNUNET_MessageHeader *msg)
 Process a end of list reply about info on all peers. More...
 
static void reconnect (void *cls)
 Reconnect to the service and try again. More...
 
static void error_handler (void *cls, enum GNUNET_MQ_Error error)
 Function called on connection trouble. More...
 
struct GNUNET_CADET_PeersListerGNUNET_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. More...
 
void * GNUNET_CADET_list_peers_cancel (struct GNUNET_CADET_PeersLister *pl)
 Cancel a peer info request. More...
 

Detailed Description

cadet api: client implementation of cadet service

Author
Bartlomiej Polot
Christian Grothoff

Definition in file cadet_api_list_peers.c.

Function Documentation

◆ handle_get_peers()

static void handle_get_peers ( void *  cls,
const struct GNUNET_CADET_LocalInfoPeers info 
)
static

Process a local reply about info on all tunnels, pass info to the user.

Parameters
clsa struct GNUNET_CADET_PeersLister
infoMessage itself.

Definition at line 78 of file cadet_api_list_peers.c.

References GNUNET_CADET_LocalInfoPeers::best_path_length, GNUNET_CADET_PeerListEntry::best_path_length, GNUNET_CADET_LocalInfoPeers::destination, GNUNET_CADET_PeerListEntry::have_tunnel, GNUNET_CADET_PeerListEntry::n_paths, GNUNET_CADET_LocalInfoPeers::paths, GNUNET_CADET_PeerListEntry::peer, GNUNET_CADET_PeersLister::peers_cb, GNUNET_CADET_PeersLister::peers_cb_cls, and GNUNET_CADET_LocalInfoPeers::tunnel.

80 {
81  struct GNUNET_CADET_PeersLister *pl = cls;
82  struct GNUNET_CADET_PeerListEntry ple;
83 
84  ple.peer = info->destination;
85  ple.have_tunnel = (int) ntohs (info->tunnel);
86  ple.n_paths = (unsigned int) ntohs (info->paths);
87  ple.best_path_length = (unsigned int) ntohl (info->best_path_length);
88  pl->peers_cb (pl->peers_cb_cls,
89  &ple);
90 }
void * peers_cb_cls
Info callback closure for info_cb.
uint32_t best_path_length
Shortest known path.
Definition: cadet.h:359
uint16_t paths
Number of paths.
Definition: cadet.h:349
int16_t tunnel
Do we have a tunnel toward this peer?
Definition: cadet.h:354
struct GNUNET_PeerIdentity peer
Which peer is the information about?
Information we return per peer.
struct GNUNET_PeerIdentity destination
ID of the peer (can be local peer).
Definition: cadet.h:364
GNUNET_CADET_PeersCB peers_cb
Monitor callback.

◆ handle_get_peers_end()

static void handle_get_peers_end ( void *  cls,
const struct GNUNET_MessageHeader msg 
)
static

Process a end of list reply about info on all peers.

Parameters
clsa struct GNUNET_CADET_PeersLister
msgMessage itself.

Definition at line 100 of file cadet_api_list_peers.c.

References GNUNET_CADET_list_peers_cancel(), GNUNET_CADET_PeersLister::peers_cb, GNUNET_CADET_PeersLister::peers_cb_cls, and reconnect().

102 {
103  struct GNUNET_CADET_PeersLister *pl = cls;
104 
105  (void) msg;
106 
107  pl->peers_cb (pl->peers_cb_cls,
108  NULL);
110 }
void * peers_cb_cls
Info callback closure for info_cb.
void * GNUNET_CADET_list_peers_cancel(struct GNUNET_CADET_PeersLister *pl)
Cancel a peer info request.
GNUNET_CADET_PeersCB peers_cb
Monitor callback.
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◆ reconnect()

static void reconnect ( void *  cls)
static

Reconnect to the service and try again.

Parameters
clsa struct GNUNET_CADET_PeersLister operation

Definition at line 150 of file cadet_api_list_peers.c.

References GNUNET_CADET_PeersLister::cfg, env, error_handler(), get_peers(), GNUNET_CLIENT_connect(), GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS_END, GNUNET_MESSAGE_TYPE_CADET_LOCAL_REQUEST_INFO_PEERS, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_CADET_PeersLister::mq, msg, and GNUNET_CADET_PeersLister::reconnect_task.

Referenced by error_handler(), GNUNET_CADET_list_peers(), and handle_get_peers_end().

151 {
152  struct GNUNET_CADET_PeersLister *pl = cls;
157  pl),
158  GNUNET_MQ_hd_fixed_size (get_peers_end,
160  struct GNUNET_MessageHeader,
161  pl),
163  };
164  struct GNUNET_MessageHeader *msg;
165  struct GNUNET_MQ_Envelope *env;
166 
167  pl->reconnect_task = NULL;
168  pl->mq = GNUNET_CLIENT_connect (pl->cfg,
169  "cadet",
170  handlers,
171  &error_handler,
172  pl);
173  if (NULL == pl->mq)
174  return;
175  env = GNUNET_MQ_msg (msg,
177  GNUNET_MQ_send (pl->mq,
178  env);
179 }
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we use.
static void error_handler(void *cls, enum GNUNET_MQ_Error error)
Function called on connection trouble.
struct GNUNET_SCHEDULER_Task * reconnect_task
Task to reconnect.
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
struct GNUNET_MQ_Handle * mq
Message queue to talk to CADET service.
#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
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
#define GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS_END
End of local information about all peers known to the service.
Message to inform the client about one of the peers in the service.
Definition: cadet.h:339
static void get_peers(void *cls)
Call CADET's meta API, get all peers known to a peer.
Definition: gnunet-cadet.c:584
Message handler for a specific message type.
#define GNUNET_MESSAGE_TYPE_CADET_LOCAL_REQUEST_INFO_PEERS
Request local information about all peers known to the service.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS
Local information about all peers known to the service.
Header for all communications.
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
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
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◆ error_handler()

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

Function called on connection trouble.

Reconnects.

Parameters
clsa struct GNUNET_CADET_PeersLister
errorerror code from MQ

Definition at line 129 of file cadet_api_list_peers.c.

References GNUNET_CADET_PeersLister::backoff, GNUNET_MQ_destroy(), GNUNET_SCHEDULER_add_delayed(), GNUNET_TIME_randomized_backoff(), GNUNET_TIME_UNIT_MINUTES, GNUNET_CADET_PeersLister::mq, reconnect(), and GNUNET_CADET_PeersLister::reconnect_task.

Referenced by reconnect().

131 {
132  struct GNUNET_CADET_PeersLister *pl = cls;
133 
134  GNUNET_MQ_destroy (pl->mq);
135  pl->mq = NULL;
139  &reconnect,
140  pl);
141 }
struct GNUNET_SCHEDULER_Task * reconnect_task
Task to reconnect.
#define GNUNET_TIME_UNIT_MINUTES
One minute.
struct GNUNET_MQ_Handle * mq
Message queue to talk to CADET service.
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
struct GNUNET_TIME_Relative backoff
Backoff for reconnect attempts.
static void reconnect(void *cls)
Reconnect to the service and try again.
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:824
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:760
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