GNUnet  0.10.x
Data Structures | Macros | Functions | Variables
gnunet-service-testbed_barriers.c File Reference

barrier handling at the testbed controller More...

#include "gnunet-service-testbed.h"
#include "gnunet-service-testbed_barriers.h"
#include "testbed_api.h"
Include dependency graph for gnunet-service-testbed_barriers.c:

Go to the source code of this file.

Data Structures

struct  ClientCtx
 Context to be associated with each client. More...
 
struct  WBarrier
 Wrapper around Barrier handle. More...
 
struct  Barrier
 Barrier. More...
 

Macros

#define MESSAGE_SEND_TIMEOUT(s)   GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, s)
 timeout for outgoing message transmissions in seconds More...
 
#define LOCAL_QUORUM_REACHED(barrier)   ((barrier->quorum * GST_num_local_peers) <= (barrier->nreached * 100))
 Test to see if local peers have reached the required quorum of a barrier. More...
 
#define LOG(kind, ...)   GNUNET_log_from (kind, "testbed-barriers", __VA_ARGS__)
 Logging shorthand. More...
 

Functions

static void remove_barrier (struct Barrier *barrier)
 Function to remove a barrier from the barrier map and cleanup resources occupied by a barrier. More...
 
static void cancel_wrappers (struct Barrier *barrier)
 Cancels all subcontroller barrier handles. More...
 
static void send_client_status_msg (struct GNUNET_SERVICE_Client *client, const char *name, enum GNUNET_TESTBED_BarrierStatus status, const char *emsg)
 Send a status message about a barrier to the given client. More...
 
static void send_barrier_status_msg (struct Barrier *barrier, const char *emsg)
 Sends a barrier failed message. More...
 
static int check_barrier_wait (void *cls, const struct GNUNET_TESTBED_BarrierWait *msg)
 Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT messages. More...
 
static void handle_barrier_wait (void *cls, const struct GNUNET_TESTBED_BarrierWait *msg)
 Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT messages. More...
 
static void * connect_cb (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 Function called when a client connects to the testbed-barrier service. More...
 
static void disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_ctx)
 Functions with this signature are called whenever a client is disconnected on the network level. More...
 
void GST_barriers_init (struct GNUNET_CONFIGURATION_Handle *cfg)
 Function to initialise barrriers component. More...
 
static int barrier_destroy_iterator (void *cls, const struct GNUNET_HashCode *key, void *value)
 Iterator over hash map entries. More...
 
void GST_barriers_destroy ()
 Function to stop the barrier service. More...
 
static void wbarrier_status_cb (void *cls, const char *name, struct GNUNET_TESTBED_Barrier *b_, enum GNUNET_TESTBED_BarrierStatus status, const char *emsg)
 Functions of this type are to be given as callback argument to GNUNET_TESTBED_barrier_init(). More...
 
static void fwd_tout_barrier_init (void *cls)
 Function called upon timeout while waiting for a response from the subcontrollers to barrier init message. More...
 
int check_barrier_init (void *cls, const struct GNUNET_TESTBED_BarrierInit *msg)
 Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_INIT messages. More...
 
void handle_barrier_init (void *cls, const struct GNUNET_TESTBED_BarrierInit *msg)
 Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_INIT messages. More...
 
int check_barrier_cancel (void *cls, const struct GNUNET_TESTBED_BarrierCancel *msg)
 Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_CANCEL messages. More...
 
void handle_barrier_cancel (void *cls, const struct GNUNET_TESTBED_BarrierCancel *msg)
 Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_CANCEL messages. More...
 
int check_barrier_status (void *cls, const struct GNUNET_TESTBED_BarrierStatusMsg *msg)
 Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS messages. More...
 
void handle_barrier_status (void *cls, const struct GNUNET_TESTBED_BarrierStatusMsg *msg)
 Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS messages. More...
 

Variables

static struct GNUNET_CONTAINER_MultiHashMapbarrier_map
 Hashtable handle for storing initialised barriers. More...
 
static struct GNUNET_SERVICE_Handlectx
 Service context. More...
 

Detailed Description

barrier handling at the testbed controller

Author
Sree Harsha Totakura sreeh.nosp@m.arsh.nosp@m.a@tot.nosp@m.akur.nosp@m.a.in

Definition in file gnunet-service-testbed_barriers.c.

Macro Definition Documentation

◆ MESSAGE_SEND_TIMEOUT

#define MESSAGE_SEND_TIMEOUT (   s)    GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, s)

timeout for outgoing message transmissions in seconds

Definition at line 35 of file gnunet-service-testbed_barriers.c.

Referenced by handle_barrier_init().

◆ LOCAL_QUORUM_REACHED

#define LOCAL_QUORUM_REACHED (   barrier)    ((barrier->quorum * GST_num_local_peers) <= (barrier->nreached * 100))

Test to see if local peers have reached the required quorum of a barrier.

Definition at line 42 of file gnunet-service-testbed_barriers.c.

Referenced by handle_barrier_wait(), and wbarrier_status_cb().

◆ LOG

#define LOG (   kind,
  ... 
)    GNUNET_log_from (kind, "testbed-barriers", __VA_ARGS__)

Logging shorthand.

Definition at line 53 of file gnunet-service-testbed_barriers.c.

Referenced by wbarrier_status_cb().

Function Documentation

◆ remove_barrier()

static void remove_barrier ( struct Barrier barrier)
static

Function to remove a barrier from the barrier map and cleanup resources occupied by a barrier.

Parameters
barrierthe barrier handle

Definition at line 229 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, ctx, GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_CONTAINER_multihashmap_remove(), GNUNET_free, GNUNET_YES, Barrier::hash, Barrier::head, Barrier::name, and Barrier::tail.

Referenced by barrier_destroy_iterator(), fwd_tout_barrier_init(), and handle_barrier_cancel().

230 {
231  struct ClientCtx *ctx;
232 
235  &barrier->hash,
236  barrier));
237  while (NULL != (ctx = barrier->head))
238  {
240  barrier->tail,
241  ctx);
242  ctx->barrier = NULL;
243  }
244  GNUNET_free (barrier->name);
245  GNUNET_free (barrier);
246 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
Context to be associated with each client.
static struct GNUNET_CONTAINER_MultiHashMap * barrier_map
Hashtable handle for storing initialised barriers.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static struct GNUNET_SERVICE_Handle * ctx
Service context.
int GNUNET_CONTAINER_multihashmap_remove(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, const void *value)
Remove the given key-value pair from the map.
struct GNUNET_HashCode hash
The hashcode of the barrier name.
char * name
The name of the barrier.
struct ClientCtx * head
DLL head for the list of clients waiting for this barrier.
struct ClientCtx * tail
DLL tail for the list of clients waiting for this barrier.
#define GNUNET_YES
Definition: gnunet_common.h:80
struct Barrier * barrier
The barrier this client is waiting for.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ cancel_wrappers()

static void cancel_wrappers ( struct Barrier barrier)
static

Cancels all subcontroller barrier handles.

Parameters
barrierthe local barrier

Definition at line 255 of file gnunet-service-testbed_barriers.c.

References GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_TESTBED_barrier_cancel(), WBarrier::hbarrier, Barrier::whead, and Barrier::wtail.

Referenced by barrier_destroy_iterator(), fwd_tout_barrier_init(), handle_barrier_cancel(), and wbarrier_status_cb().

256 {
257  struct WBarrier *wrapper;
258 
259  while (NULL != (wrapper = barrier->whead))
260  {
263  barrier->wtail,
264  wrapper);
265  GNUNET_free (wrapper);
266  }
267 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
struct WBarrier * wtail
DLL tail for the list of barrier handles.
struct GNUNET_TESTBED_Barrier * hbarrier
The barrier handle from API.
struct WBarrier * whead
DLL head for the list of barrier handles.
void GNUNET_TESTBED_barrier_cancel(struct GNUNET_TESTBED_Barrier *barrier)
Cancel a barrier.
Definition: testbed_api.c:2426
Wrapper around Barrier handle.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ send_client_status_msg()

static void send_client_status_msg ( struct GNUNET_SERVICE_Client client,
const char *  name,
enum GNUNET_TESTBED_BarrierStatus  status,
const char *  emsg 
)
static

Send a status message about a barrier to the given client.

Parameters
clientthe client to send the message to
namethe barrier name
statusthe status of the barrier
emsgthe error message; should be non-NULL for status=GNUNET_TESTBED_BARRIERSTATUS_ERROR

Definition at line 280 of file gnunet-service-testbed_barriers.c.

References GNUNET_TESTBED_BarrierStatusMsg::data, env, GNUNET_assert, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_SERVICE_client_get_mq(), GNUNET_TESTBED_BARRIERSTATUS_ERROR, msg, GNUNET_TESTBED_BarrierStatusMsg::name_len, and GNUNET_TESTBED_BarrierStatusMsg::status.

Referenced by handle_barrier_init(), and send_barrier_status_msg().

284 {
285  struct GNUNET_MQ_Envelope *env;
287  size_t name_len;
288  size_t err_len;
289 
290  GNUNET_assert ( (NULL == emsg) ||
292  name_len = strlen (name) + 1;
293  err_len = ((NULL == emsg) ? 0 : (strlen (emsg) + 1));
294  env = GNUNET_MQ_msg_extra (msg,
295  name_len + err_len,
297  msg->status = htons (status);
298  msg->name_len = htons ((uint16_t) name_len - 1);
299  GNUNET_memcpy (msg->data,
300  name,
301  name_len);
302  GNUNET_memcpy (msg->data + name_len,
303  emsg,
304  err_len);
306  env);
307 }
#define GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS
Message for signalling status of a barrier.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
uint16_t name_len
strlen of the barrier name
Definition: testbed.h:877
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2734
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
uint16_t status
status.
Definition: testbed.h:872
#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
#define GNUNET_memcpy(dst, src, n)
uint16_t status
See PRISM_STATUS_*-constants.
char data[0]
the barrier name (0-terminated) concatenated with an error message (0-terminated) if the status were ...
Definition: testbed.h:883
const char * name
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
Message for signalling status changes of a barrier.
Definition: testbed.h:862
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
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◆ send_barrier_status_msg()

static void send_barrier_status_msg ( struct Barrier barrier,
const char *  emsg 
)
static

Sends a barrier failed message.

Parameters
barrierthe corresponding barrier
emsgthe error message; should be non-NULL for status=GNUNET_TESTBED_BARRIERSTATUS_ERROR

Definition at line 318 of file gnunet-service-testbed_barriers.c.

References GNUNET_assert, Barrier::mc, Barrier::name, send_client_status_msg(), and Barrier::status.

Referenced by fwd_tout_barrier_init(), handle_barrier_init(), handle_barrier_wait(), and wbarrier_status_cb().

320 {
321  GNUNET_assert (0 != barrier->status);
322  send_client_status_msg (barrier->mc,
323  barrier->name,
324  barrier->status,
325  emsg);
326 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
enum GNUNET_TESTBED_BarrierStatus status
The status of this barrier.
struct GNUNET_SERVICE_Client * mc
The client handle to the master controller.
char * name
The name of the barrier.
static void send_client_status_msg(struct GNUNET_SERVICE_Client *client, const char *name, enum GNUNET_TESTBED_BarrierStatus status, const char *emsg)
Send a status message about a barrier to the given client.
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◆ check_barrier_wait()

static int check_barrier_wait ( void *  cls,
const struct GNUNET_TESTBED_BarrierWait msg 
)
static

Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT messages.

Parameters
clsidentification of the client
messagethe actual message

Definition at line 336 of file gnunet-service-testbed_barriers.c.

References GNUNET_OK.

338 {
339  return GNUNET_OK; /* always well-formed */
340 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78

◆ handle_barrier_wait()

static void handle_barrier_wait ( void *  cls,
const struct GNUNET_TESTBED_BarrierWait msg 
)
static

Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT messages.

This message should come from peers or a shared helper service using the testbed-barrier client API (

See also
gnunet_testbed_barrier_service.h)

This handler is queued in the main service and will handle the messages sent either from the testbed driver or from a high level controller

Parameters
clsidentification of the client
messagethe actual message

Definition at line 355 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, ClientCtx::client, GNUNET_break, GNUNET_CONTAINER_DLL_insert_tail, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CRYPTO_hash(), GNUNET_free, GNUNET_malloc, GNUNET_memcpy, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_TESTBED_BARRIERSTATUS_CROSSED, Barrier::head, GNUNET_TESTBED_BarrierWait::header, LOCAL_QUORUM_REACHED, LOG_DEBUG, name, GNUNET_TESTBED_BarrierWait::name, Barrier::nreached, Barrier::num_wbarriers, Barrier::num_wbarriers_reached, send_barrier_status_msg(), GNUNET_MessageHeader::size, Barrier::status, and Barrier::tail.

357 {
358  struct ClientCtx *client_ctx = cls;
359  struct Barrier *barrier;
360  char *name;
361  struct GNUNET_HashCode key;
362  size_t name_len;
363  uint16_t msize;
364 
365  msize = ntohs (msg->header.size);
366  if (NULL == barrier_map)
367  {
368  GNUNET_break (0);
369  GNUNET_SERVICE_client_drop (client_ctx->client);
370  return;
371  }
372  name_len = msize - sizeof (struct GNUNET_TESTBED_BarrierWait);
373  name = GNUNET_malloc (name_len + 1);
374  name[name_len] = '\0';
375  GNUNET_memcpy (name,
376  msg->name,
377  name_len);
378  LOG_DEBUG ("Received BARRIER_WAIT for barrier `%s'\n",
379  name);
380  GNUNET_CRYPTO_hash (name,
381  name_len,
382  &key);
383  GNUNET_free (name);
384  if (NULL == (barrier = GNUNET_CONTAINER_multihashmap_get (barrier_map, &key)))
385  {
386  GNUNET_break (0);
387  GNUNET_SERVICE_client_drop (client_ctx->client);
388  return;
389  }
390  if (NULL != client_ctx->barrier)
391  {
392  GNUNET_break (0);
393  GNUNET_SERVICE_client_drop (client_ctx->client);
394  return;
395  }
396  client_ctx->barrier = barrier;
398  barrier->tail,
399  client_ctx);
400  barrier->nreached++;
401  if ( (barrier->num_wbarriers_reached == barrier->num_wbarriers) &&
402  (LOCAL_QUORUM_REACHED (barrier)) )
403  {
405  send_barrier_status_msg (barrier,
406  NULL);
407  }
409 }
unsigned int num_wbarriers_reached
Number of wrapped barriers reached so far.
Context to be associated with each client.
char name[0]
The name of the barrier they have reached.
Definition: testbed.h:901
static struct GNUNET_CONTAINER_MultiHashMap * barrier_map
Hashtable handle for storing initialised barriers.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
static void send_barrier_status_msg(struct Barrier *barrier, const char *emsg)
Sends a barrier failed message.
enum GNUNET_TESTBED_BarrierStatus status
The status of this barrier.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Message sent from peers to the testbed-barrier service to indicate that they have reached a barrier a...
Definition: testbed.h:891
unsigned int num_wbarriers
Number of barriers wrapped in the above DLL.
void * GNUNET_CONTAINER_multihashmap_get(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Given a key find a value in the map matching the key.
#define GNUNET_memcpy(dst, src, n)
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:44
unsigned int nreached
Number of peers which have reached this barrier.
A 512-bit hashcode.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2618
struct GNUNET_HashCode key
The key used in the DHT.
const char * name
#define GNUNET_CONTAINER_DLL_insert_tail(head, tail, element)
Insert an element at the tail of a DLL.
#define LOCAL_QUORUM_REACHED(barrier)
Test to see if local peers have reached the required quorum of a barrier.
struct GNUNET_SERVICE_Client * client
The client handle.
struct ClientCtx * head
DLL head for the list of clients waiting for this barrier.
struct ClientCtx * tail
DLL tail for the list of clients waiting for this barrier.
struct GNUNET_MessageHeader header
Type is GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT.
Definition: testbed.h:896
struct Barrier * barrier
The barrier this client is waiting for.
#define LOG_DEBUG(msg)
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
#define GNUNET_malloc(size)
Wrapper around malloc.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ connect_cb()

static void* connect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
struct GNUNET_MQ_Handle mq 
)
static

Function called when a client connects to the testbed-barrier service.

Parameters
clsNULL
clientthe connecting client
mqqueue to talk to client
Returns
our struct ClientCtx

Definition at line 421 of file gnunet-service-testbed_barriers.c.

References ClientCtx::client, GNUNET_new, and LOG_DEBUG.

Referenced by GST_barriers_init().

424 {
425  struct ClientCtx *client_ctx;
426 
427  LOG_DEBUG ("Client connected to testbed-barrier service\n");
428  client_ctx = GNUNET_new (struct ClientCtx);
429  client_ctx->client = client;
430  return client_ctx;
431 }
Context to be associated with each client.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
struct GNUNET_SERVICE_Client * client
The client handle.
#define LOG_DEBUG(msg)
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◆ disconnect_cb()

static void disconnect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
void *  app_ctx 
)
static

Functions with this signature are called whenever a client is disconnected on the network level.

Parameters
clsclosure
clientidentification of the client; NULL for the last call when the server is destroyed

Definition at line 443 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, GNUNET_CONTAINER_DLL_remove, GNUNET_free, Barrier::head, LOG_DEBUG, and Barrier::tail.

Referenced by GST_barriers_init().

446 {
447  struct ClientCtx *client_ctx = app_ctx;
448  struct Barrier *barrier = client_ctx->barrier;
449 
450  if (NULL != barrier)
451  {
453  barrier->tail,
454  client_ctx);
455  client_ctx->barrier = NULL;
456  }
457  GNUNET_free (client_ctx);
458  LOG_DEBUG ("Client disconnected from testbed-barrier service\n");
459 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
Context to be associated with each client.
struct ClientCtx * head
DLL head for the list of clients waiting for this barrier.
struct ClientCtx * tail
DLL tail for the list of clients waiting for this barrier.
struct Barrier * barrier
The barrier this client is waiting for.
#define LOG_DEBUG(msg)
#define GNUNET_free(ptr)
Wrapper around free.
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◆ GST_barriers_init()

void GST_barriers_init ( struct GNUNET_CONFIGURATION_Handle cfg)

Function to initialise barrriers component.

Parameters
cfgthe configuration to use for initialisation

Definition at line 468 of file gnunet-service-testbed_barriers.c.

References connect_cb(), disconnect_cb(), GNUNET_CONTAINER_multihashmap_create(), GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT, GNUNET_MQ_handler_end, GNUNET_MQ_hd_var_size, GNUNET_SERVICE_start(), GNUNET_YES, and LOG_DEBUG.

Referenced by testbed_run().

469 {
470  struct GNUNET_MQ_MessageHandler message_handlers[] = {
471  GNUNET_MQ_hd_var_size (barrier_wait,
474  NULL),
476  };
477 
478  LOG_DEBUG ("Launching testbed-barrier service\n");
480  GNUNET_YES);
481  ctx = GNUNET_SERVICE_start ("testbed-barrier",
482  cfg,
483  &connect_cb,
484  &disconnect_cb,
485  NULL,
486  message_handlers);
487 }
static struct GNUNET_CONTAINER_MultiHashMap * barrier_map
Hashtable handle for storing initialised barriers.
#define GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_WAIT
Message sent by a peer when it has reached a barrier and is waiting for it to be crossed.
struct GNUNET_SERVICE_Handle * GNUNET_SERVICE_start(const char *service_name, const struct GNUNET_CONFIGURATION_Handle *cfg, GNUNET_SERVICE_ConnectHandler connect_cb, GNUNET_SERVICE_DisconnectHandler disconnect_cb, void *cls, const struct GNUNET_MQ_MessageHandler *handlers)
Low-level function to start a service if the scheduler is already running.
Definition: service.c:2157
Message sent from peers to the testbed-barrier service to indicate that they have reached a barrier a...
Definition: testbed.h:891
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
static struct GNUNET_SERVICE_Handle * ctx
Service context.
static void disconnect_cb(void *cls, struct GNUNET_SERVICE_Client *client, void *app_ctx)
Functions with this signature are called whenever a client is disconnected on the network level...
Message handler for a specific message type.
static void * connect_cb(void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
Function called when a client connects to the testbed-barrier service.
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
#define GNUNET_YES
Definition: gnunet_common.h:80
#define LOG_DEBUG(msg)
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
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◆ barrier_destroy_iterator()

static int barrier_destroy_iterator ( void *  cls,
const struct GNUNET_HashCode key,
void *  value 
)
static

Iterator over hash map entries.

Parameters
clsclosure
keycurrent key code
valuevalue in the hash map
Returns
GNUNET_YES if we should continue to iterate, GNUNET_NO if not.

Definition at line 501 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, cancel_wrappers(), GNUNET_assert, GNUNET_YES, remove_barrier(), and value.

Referenced by GST_barriers_destroy().

504 {
505  struct Barrier *barrier = value;
506 
507  GNUNET_assert (NULL != barrier);
508  cancel_wrappers (barrier);
509  remove_barrier (barrier);
510  return GNUNET_YES;
511 }
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static char * value
Value of the record to add/remove.
static void cancel_wrappers(struct Barrier *barrier)
Cancels all subcontroller barrier handles.
#define GNUNET_YES
Definition: gnunet_common.h:80
static void remove_barrier(struct Barrier *barrier)
Function to remove a barrier from the barrier map and cleanup resources occupied by a barrier...
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◆ GST_barriers_destroy()

void GST_barriers_destroy ( void  )

Function to stop the barrier service.

Definition at line 518 of file gnunet-service-testbed_barriers.c.

References barrier_destroy_iterator(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_SERVICE_stop(), and GNUNET_SYSERR.

Referenced by shutdown_task().

519 {
520  GNUNET_assert (NULL != barrier_map);
524  NULL));
526  GNUNET_assert (NULL != ctx);
528 }
static struct GNUNET_CONTAINER_MultiHashMap * barrier_map
Hashtable handle for storing initialised barriers.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
static struct GNUNET_SERVICE_Handle * ctx
Service context.
void GNUNET_SERVICE_stop(struct GNUNET_SERVICE_Handle *srv)
Stops a service that was started with GNUNET_SERVICE_start().
Definition: service.c:2193
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static int barrier_destroy_iterator(void *cls, const struct GNUNET_HashCode *key, void *value)
Iterator over hash map entries.
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
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◆ wbarrier_status_cb()

static void wbarrier_status_cb ( void *  cls,
const char *  name,
struct GNUNET_TESTBED_Barrier b_,
enum GNUNET_TESTBED_BarrierStatus  status,
const char *  emsg 
)
static

Functions of this type are to be given as callback argument to GNUNET_TESTBED_barrier_init().

The callback will be called when status information is available for the barrier.

Parameters
clsthe closure given to GNUNET_TESTBED_barrier_init()
namethe name of the barrier
b_the barrier handle
statusstatus of the barrier; GNUNET_OK if the barrier is crossed; GNUNET_SYSERR upon error
emsgif the status were to be GNUNET_SYSERR, this parameter has the error messsage

Definition at line 545 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, WBarrier::barrier, cancel_wrappers(), GNUNET_assert, GNUNET_break_op, GNUNET_ERROR_TYPE_ERROR, GNUNET_TESTBED_BARRIERSTATUS_CROSSED, GNUNET_TESTBED_BARRIERSTATUS_ERROR, GNUNET_TESTBED_BARRIERSTATUS_INITIALISED, WBarrier::hbarrier, LOCAL_QUORUM_REACHED, LOG, Barrier::name, Barrier::num_wbarriers, Barrier::num_wbarriers_inited, Barrier::num_wbarriers_reached, send_barrier_status_msg(), and Barrier::status.

Referenced by handle_barrier_init().

550 {
551  struct WBarrier *wrapper = cls;
552  struct Barrier *barrier = wrapper->barrier;
553 
554  GNUNET_assert (b_ == wrapper->hbarrier);
555  switch (status)
556  {
559  "Initialising barrier `%s' failed at a sub-controller: %s\n",
560  barrier->name,
561  (NULL != emsg) ? emsg : "NULL");
562  cancel_wrappers (barrier);
563  if (NULL == emsg)
564  emsg = "Initialisation failed at a sub-controller";
566  send_barrier_status_msg (barrier, emsg);
567  return;
570  {
571  GNUNET_break_op (0);
572  return;
573  }
574  barrier->num_wbarriers_reached++;
575  if ((barrier->num_wbarriers_reached == barrier->num_wbarriers)
576  && (LOCAL_QUORUM_REACHED (barrier)))
577  {
579  send_barrier_status_msg (barrier, NULL);
580  }
581  return;
583  if (0 != barrier->status)
584  {
585  GNUNET_break_op (0);
586  return;
587  }
588  barrier->num_wbarriers_inited++;
589  if (barrier->num_wbarriers_inited == barrier->num_wbarriers)
590  {
592  send_barrier_status_msg (barrier, NULL);
593  }
594  return;
595  }
596 }
unsigned int num_wbarriers_reached
Number of wrapped barriers reached so far.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static void send_barrier_status_msg(struct Barrier *barrier, const char *emsg)
Sends a barrier failed message.
struct GNUNET_TESTBED_Barrier * hbarrier
The barrier handle from API.
enum GNUNET_TESTBED_BarrierStatus status
The status of this barrier.
unsigned int num_wbarriers
Number of barriers wrapped in the above DLL.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
static void cancel_wrappers(struct Barrier *barrier)
Cancels all subcontroller barrier handles.
uint16_t status
See PRISM_STATUS_*-constants.
unsigned int num_wbarriers_inited
Number of wrapped barrier initialised so far.
#define LOG(kind,...)
Logging shorthand.
#define LOCAL_QUORUM_REACHED(barrier)
Test to see if local peers have reached the required quorum of a barrier.
char * name
The name of the barrier.
Wrapper around Barrier handle.
Barrier initialised successfully.
struct Barrier * barrier
The local barrier associated with the creation of this wrapper.
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◆ fwd_tout_barrier_init()

static void fwd_tout_barrier_init ( void *  cls)
static

Function called upon timeout while waiting for a response from the subcontrollers to barrier init message.

Parameters
clsbarrier

Definition at line 606 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, cancel_wrappers(), GNUNET_TESTBED_BARRIERSTATUS_ERROR, remove_barrier(), send_barrier_status_msg(), and Barrier::status.

Referenced by handle_barrier_init().

607 {
608  struct Barrier *barrier = cls;
609 
610  cancel_wrappers (barrier);
612  send_barrier_status_msg (barrier,
613  "Timedout while propagating barrier initialisation\n");
614  remove_barrier (barrier);
615 }
static void send_barrier_status_msg(struct Barrier *barrier, const char *emsg)
Sends a barrier failed message.
enum GNUNET_TESTBED_BarrierStatus status
The status of this barrier.
static void cancel_wrappers(struct Barrier *barrier)
Cancels all subcontroller barrier handles.
static void remove_barrier(struct Barrier *barrier)
Function to remove a barrier from the barrier map and cleanup resources occupied by a barrier...
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◆ check_barrier_init()

int check_barrier_init ( void *  cls,
const struct GNUNET_TESTBED_BarrierInit msg 
)

Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_INIT messages.

Parameters
clsidentification of the client
msgthe actual message
Returns
GNUNET_OK if msg is well-formed

Definition at line 627 of file gnunet-service-testbed_barriers.c.

References GNUNET_OK.

629 {
630  return GNUNET_OK; /* always well-formed */
631 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78

◆ handle_barrier_init()

void handle_barrier_init ( void *  cls,
const struct GNUNET_TESTBED_BarrierInit msg 
)

Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_INIT messages.

This message should always come from a parent controller or the testbed API if we are the root controller.

This handler is queued in the main service and will handle the messages sent either from the testbed driver or from a high level controller

Parameters
clsidentification of the client
msgthe actual message

Definition at line 646 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, WBarrier::barrier, ClientCtx::client, Context::client, Slave::controller, WBarrier::controller, fwd_tout_barrier_init(), GNUNET_assert, GNUNET_break, GNUNET_break_op, GNUNET_CONTAINER_DLL_insert_tail, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST, GNUNET_CRYPTO_hash(), GNUNET_free, GNUNET_malloc, GNUNET_memcpy, GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_add_delayed(), GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_TESTBED_barrier_init_(), GNUNET_TESTBED_BARRIERSTATUS_ERROR, GNUNET_TESTBED_BARRIERSTATUS_INITIALISED, GNUNET_YES, GST_context, GST_slave_list, GST_slave_list_size, Barrier::hash, WBarrier::hbarrier, GNUNET_TESTBED_BarrierInit::header, LOG_DEBUG, Barrier::mc, MESSAGE_SEND_TIMEOUT, Barrier::name, name, GNUNET_TESTBED_BarrierInit::name, Barrier::num_wbarriers, Barrier::quorum, GNUNET_TESTBED_BarrierInit::quorum, send_barrier_status_msg(), send_client_status_msg(), GNUNET_MessageHeader::size, Barrier::status, Barrier::tout_task, wbarrier_status_cb(), Barrier::whead, and Barrier::wtail.

648 {
649  struct GNUNET_SERVICE_Client *client = cls;
650  char *name;
651  struct Barrier *barrier;
652  struct Slave *slave;
653  struct WBarrier *wrapper;
654  struct GNUNET_HashCode hash;
655  size_t name_len;
656  unsigned int cnt;
657  uint16_t msize;
658 
659  if (NULL == GST_context)
660  {
661  GNUNET_break_op (0);
663  return;
664  }
665  if (client != GST_context->client)
666  {
667  GNUNET_break_op (0);
669  return;
670  }
671  msize = ntohs (msg->header.size);
672  name_len = (size_t) msize - sizeof (struct GNUNET_TESTBED_BarrierInit);
673  name = GNUNET_malloc (name_len + 1);
674  GNUNET_memcpy (name, msg->name, name_len);
675  GNUNET_CRYPTO_hash (name, name_len, &hash);
676  LOG_DEBUG ("Received BARRIER_INIT for barrier `%s'\n",
677  name);
678  if (GNUNET_YES ==
680  &hash))
681  {
682  send_client_status_msg (client,
683  name,
685  "A barrier with the same name already exists");
686  GNUNET_free (name);
688  return;
689  }
690  barrier = GNUNET_new (struct Barrier);
691  barrier->hash = hash;
692  barrier->quorum = msg->quorum;
693  barrier->name = name;
694  barrier->mc = client;
697  &barrier->hash,
698  barrier,
701  /* Propagate barrier init to subcontrollers */
702  for (cnt = 0; cnt < GST_slave_list_size; cnt++)
703  {
704  if (NULL == (slave = GST_slave_list[cnt]))
705  continue;
706  if (NULL == slave->controller)
707  {
708  GNUNET_break (0);/* May happen when we are connecting to the controller */
709  continue;
710  }
711  wrapper = GNUNET_new (struct WBarrier);
712  wrapper->barrier = barrier;
713  wrapper->controller = slave->controller;
715  barrier->wtail,
716  wrapper);
717  barrier->num_wbarriers++;
718  wrapper->hbarrier = GNUNET_TESTBED_barrier_init_ (wrapper->controller,
719  barrier->name,
720  barrier->quorum,
722  wrapper,
723  GNUNET_NO);
724  }
725  if (NULL == barrier->whead) /* No further propagation */
726  {
728  LOG_DEBUG ("Sending GNUNET_TESTBED_BARRIERSTATUS_INITIALISED for barrier `%s'\n",
729  barrier->name);
730  send_barrier_status_msg (barrier, NULL);
731  }else
734  barrier);
735 }
struct WBarrier * wtail
DLL tail for the list of barrier handles.
static struct GNUNET_CONTAINER_MultiHashMap * barrier_map
Hashtable handle for storing initialised barriers.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_new(type)
Allocate a struct or union of the given type.
Structure representing a connected(directly-linked) controller.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
int GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL)...
static void send_barrier_status_msg(struct Barrier *barrier, const char *emsg)
Sends a barrier failed message.
struct GNUNET_TESTBED_Barrier * hbarrier
The barrier handle from API.
enum GNUNET_TESTBED_BarrierStatus status
The status of this barrier.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
unsigned int num_wbarriers
Number of barriers wrapped in the above DLL.
Handle to a client that is connected to a service.
Definition: service.c:249
#define MESSAGE_SEND_TIMEOUT(s)
timeout for outgoing message transmissions in seconds
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:1246
#define GNUNET_memcpy(dst, src, n)
, &#39; bother checking if a value already exists (faster than GNUNET_CONTAINER_MULTIHASHMAPOPTION_...
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:44
struct WBarrier * whead
DLL head for the list of barrier handles.
struct GNUNET_SERVICE_Client * client
The client handle associated with this context.
struct GNUNET_TESTBED_Controller * controller
Handle to the slave controller where this wrapper creates a barrier.
A 512-bit hashcode.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2618
struct GNUNET_HashCode hash
The hashcode of the barrier name.
struct GNUNET_TESTBED_Barrier * GNUNET_TESTBED_barrier_init_(struct GNUNET_TESTBED_Controller *controller, const char *name, unsigned int quorum, GNUNET_TESTBED_barrier_status_cb cb, void *cls, int echo)
Initialise a barrier and call the given callback when the required percentage of peers (quorum) reach...
Definition: testbed_api.c:2338
struct GNUNET_SERVICE_Client * mc
The client handle to the master controller.
const char * name
struct GNUNET_MessageHeader header
Type is GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_INIT.
Definition: testbed.h:828
#define GNUNET_CONTAINER_DLL_insert_tail(head, tail, element)
Insert an element at the tail of a DLL.
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
static void wbarrier_status_cb(void *cls, const char *name, struct GNUNET_TESTBED_Barrier *b_, enum GNUNET_TESTBED_BarrierStatus status, const char *emsg)
Functions of this type are to be given as callback argument to GNUNET_TESTBED_barrier_init().
char * name
The name of the barrier.
uint8_t quorum
Quorum percentage to be reached.
struct Context * GST_context
The master context; generated with the first INIT message.
struct GNUNET_SCHEDULER_Task * tout_task
Identifier for the timeout task.
Wrapper around Barrier handle.
uint8_t quorum
The quorum percentage needed for crossing the barrier.
Definition: testbed.h:833
static void fwd_tout_barrier_init(void *cls)
Function called upon timeout while waiting for a response from the subcontrollers to barrier init mes...
struct GNUNET_TESTBED_Controller * controller
The controller handle.
Barrier initialised successfully.
#define GNUNET_YES
Definition: gnunet_common.h:80
char name[0]
name of the barrier.
Definition: testbed.h:838
#define LOG_DEBUG(msg)
Message to initialise a barrier.
Definition: testbed.h:823
struct Barrier * barrier
The local barrier associated with the creation of this wrapper.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
#define GNUNET_malloc(size)
Wrapper around malloc.
#define GNUNET_free(ptr)
Wrapper around free.
static void send_client_status_msg(struct GNUNET_SERVICE_Client *client, const char *name, enum GNUNET_TESTBED_BarrierStatus status, const char *emsg)
Send a status message about a barrier to the given client.
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◆ check_barrier_cancel()

int check_barrier_cancel ( void *  cls,
const struct GNUNET_TESTBED_BarrierCancel msg 
)

Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_CANCEL messages.

Parameters
clsidentification of the client
msgthe actual message
Returns
GNUNET_OK if msg is well-formed

Definition at line 746 of file gnunet-service-testbed_barriers.c.

References GNUNET_OK.

748 {
749  return GNUNET_OK; /* all are well-formed */
750 }
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78

◆ handle_barrier_cancel()

void handle_barrier_cancel ( void *  cls,
const struct GNUNET_TESTBED_BarrierCancel msg 
)

Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_CANCEL messages.

This message should always come from a parent controller or the testbed API if we are the root controller.

This handler is queued in the main service and will handle the messages sent either from the testbed driver or from a high level controller

Parameters
clsidentification of the client
msgthe actual message

Definition at line 765 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, cancel_wrappers(), ClientCtx::client, Context::client, GNUNET_assert, GNUNET_break_op, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CONTAINER_multihashmap_get(), GNUNET_CRYPTO_hash(), GNUNET_malloc, GNUNET_memcpy, GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GST_context, GNUNET_TESTBED_BarrierCancel::header, LOG_DEBUG, name, GNUNET_TESTBED_BarrierCancel::name, remove_barrier(), and GNUNET_MessageHeader::size.

767 {
768  struct GNUNET_SERVICE_Client *client = cls;
769  char *name;
770  struct Barrier *barrier;
771  struct GNUNET_HashCode hash;
772  size_t name_len;
773  uint16_t msize;
774 
775  if (NULL == GST_context)
776  {
777  GNUNET_break_op (0);
779  return;
780  }
781  if (client != GST_context->client)
782  {
783  GNUNET_break_op (0);
785  return;
786  }
787  msize = ntohs (msg->header.size);
788  name_len = msize - sizeof (struct GNUNET_TESTBED_BarrierCancel);
789  name = GNUNET_malloc (name_len + 1);
790  GNUNET_memcpy (name,
791  msg->name,
792  name_len);
793  LOG_DEBUG ("Received BARRIER_CANCEL for barrier `%s'\n",
794  name);
795  GNUNET_CRYPTO_hash (name,
796  name_len,
797  &hash);
798  if (GNUNET_NO ==
800  &hash))
801  {
802  GNUNET_break_op (0);
804  return;
805  }
807  &hash);
808  GNUNET_assert (NULL != barrier);
809  cancel_wrappers (barrier);
810  remove_barrier (barrier);
812 }
Message to cancel a barrier.
Definition: testbed.h:845
static struct GNUNET_CONTAINER_MultiHashMap * barrier_map
Hashtable handle for storing initialised barriers.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_NO
Definition: gnunet_common.h:81
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
int GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL)...
struct GNUNET_MessageHeader header
Type is GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_CANCEL.
Definition: testbed.h:850
void * GNUNET_CONTAINER_multihashmap_get(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Given a key find a value in the map matching the key.
Handle to a client that is connected to a service.
Definition: service.c:249
#define GNUNET_memcpy(dst, src, n)
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:44
static void cancel_wrappers(struct Barrier *barrier)
Cancels all subcontroller barrier handles.
struct GNUNET_SERVICE_Client * client
The client handle associated with this context.
char name[0]
The barrier name.
Definition: testbed.h:855
A 512-bit hashcode.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2618
const char * name
struct Context * GST_context
The master context; generated with the first INIT message.
#define LOG_DEBUG(msg)
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
static void remove_barrier(struct Barrier *barrier)
Function to remove a barrier from the barrier map and cleanup resources occupied by a barrier...
#define GNUNET_malloc(size)
Wrapper around malloc.
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◆ check_barrier_status()

int check_barrier_status ( void *  cls,
const struct GNUNET_TESTBED_BarrierStatusMsg msg 
)

Check GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS messages.

Parameters
clsidentification of the client
msgthe actual message
Returns
GNUNET_OK if msg is well-formed

Definition at line 823 of file gnunet-service-testbed_barriers.c.

References GNUNET_TESTBED_BarrierStatusMsg::data, GNUNET_break_op, GNUNET_OK, GNUNET_SYSERR, GNUNET_TESTBED_BARRIERSTATUS_CROSSED, GNUNET_TESTBED_BarrierStatusMsg::header, name, GNUNET_TESTBED_BarrierStatusMsg::name_len, GNUNET_MessageHeader::size, status, and GNUNET_TESTBED_BarrierStatusMsg::status.

825 {
826  uint16_t msize;
827  uint16_t name_len;
828  const char *name;
830 
831  msize = ntohs (msg->header.size) - sizeof (*msg);
832  status = ntohs (msg->status);
834  {
835  GNUNET_break_op (0); /* current we only expect BARRIER_CROSSED
836  status message this way */
837  return GNUNET_SYSERR;
838  }
839  name = msg->data;
840  name_len = ntohs (msg->name_len);
841  if ((name_len + 1) != msize)
842  {
843  GNUNET_break_op (0);
844  return GNUNET_SYSERR;
845  }
846  if ('\0' != name[name_len])
847  {
848  GNUNET_break_op (0);
849  return GNUNET_SYSERR;
850  }
851  return GNUNET_OK;
852 }
uint16_t name_len
strlen of the barrier name
Definition: testbed.h:877
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
struct GNUNET_MessageHeader header
Type is GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS.
Definition: testbed.h:867
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
GNUNET_TESTBED_BarrierStatus
Status of a barrier.
uint16_t status
status.
Definition: testbed.h:872
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
uint16_t status
See PRISM_STATUS_*-constants.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
char data[0]
the barrier name (0-terminated) concatenated with an error message (0-terminated) if the status were ...
Definition: testbed.h:883
const char * name

◆ handle_barrier_status()

void handle_barrier_status ( void *  cls,
const struct GNUNET_TESTBED_BarrierStatusMsg msg 
)

Message handler for GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS messages.

This handler is queued in the main service and will handle the messages sent either from the testbed driver or from a high level controller

Parameters
clsidentification of the client
msgthe actual message

The wrapper barriers do not echo the barrier status, so we have to do it here

Definition at line 864 of file gnunet-service-testbed_barriers.c.

References ClientCtx::barrier, ClientCtx::client, Context::client, WBarrier::controller, GNUNET_TESTBED_BarrierStatusMsg::data, env, GNUNET_break_op, GNUNET_CONTAINER_multihashmap_get(), GNUNET_copy_message(), GNUNET_CRYPTO_hash(), GNUNET_MQ_msg_copy(), GNUNET_MQ_send(), GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_SERVICE_client_get_mq(), GNUNET_TESTBED_queue_message_(), GST_context, Barrier::head, GNUNET_TESTBED_BarrierStatusMsg::header, LOG_DEBUG, name, GNUNET_TESTBED_BarrierStatusMsg::name_len, ClientCtx::next, WBarrier::next, and Barrier::whead.

866 {
867  struct GNUNET_SERVICE_Client *client = cls;
868  struct Barrier *barrier;
869  struct ClientCtx *client_ctx;
870  struct WBarrier *wrapper;
871  const char *name;
872  struct GNUNET_HashCode key;
873  uint16_t name_len;
874  struct GNUNET_MQ_Envelope *env;
875 
876  if (NULL == GST_context)
877  {
878  GNUNET_break_op (0);
880  return;
881  }
882  if (client != GST_context->client)
883  {
884  GNUNET_break_op (0);
886  return;
887  }
888  name = msg->data;
889  name_len = ntohs (msg->name_len);
890  LOG_DEBUG ("Received BARRIER_STATUS for barrier `%s'\n",
891  name);
892  GNUNET_CRYPTO_hash (name,
893  name_len,
894  &key);
896  &key);
897  if (NULL == barrier)
898  {
899  GNUNET_break_op (0);
901  return;
902  }
904  for(client_ctx = barrier->head; NULL != client_ctx; client_ctx = client_ctx->next) /* Notify peers */
905  {
906  env = GNUNET_MQ_msg_copy (&msg->header);
908  env);
909  }
914  for (wrapper = barrier->whead; NULL != wrapper; wrapper = wrapper->next)
915  {
917  GNUNET_copy_message (&msg->header));
918  }
919 }
struct GNUNET_MQ_Envelope * GNUNET_MQ_msg_copy(const struct GNUNET_MessageHeader *hdr)
Create a new envelope by copying an existing message.
Definition: mq.c:653
struct WBarrier * next
DLL next pointer.
Context to be associated with each client.
static struct GNUNET_CONTAINER_MultiHashMap * barrier_map
Hashtable handle for storing initialised barriers.
uint16_t name_len
strlen of the barrier name
Definition: testbed.h:877
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2734
struct GNUNET_MessageHeader header
Type is GNUNET_MESSAGE_TYPE_TESTBED_BARRIER_STATUS.
Definition: testbed.h:867
void * GNUNET_CONTAINER_multihashmap_get(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Given a key find a value in the map matching the key.
Handle to a client that is connected to a service.
Definition: service.c:249
struct ClientCtx * next
DLL next ptr.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:44
struct WBarrier * whead
DLL head for the list of barrier handles.
struct GNUNET_SERVICE_Client * client
The client handle associated with this context.
struct GNUNET_TESTBED_Controller * controller
Handle to the slave controller where this wrapper creates a barrier.
A 512-bit hashcode.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2618
struct GNUNET_HashCode key
The key used in the DHT.
char data[0]
the barrier name (0-terminated) concatenated with an error message (0-terminated) if the status were ...
Definition: testbed.h:883
void GNUNET_TESTBED_queue_message_(struct GNUNET_TESTBED_Controller *controller, struct GNUNET_MessageHeader *msg)
Queues a message in send queue for sending to the service.
Definition: testbed_api.c:1315
const char * name
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GNUNET_SERVICE_Client * client
The client handle.
struct Context * GST_context
The master context; generated with the first INIT message.
struct ClientCtx * head
DLL head for the list of clients waiting for this barrier.
Wrapper around Barrier handle.
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 LOG_DEBUG(msg)
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2533
struct GNUNET_MessageHeader * GNUNET_copy_message(const struct GNUNET_MessageHeader *msg)
Create a copy of the given message.
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Variable Documentation

◆ barrier_map

struct GNUNET_CONTAINER_MultiHashMap* barrier_map
static

Hashtable handle for storing initialised barriers.

Definition at line 214 of file gnunet-service-testbed_barriers.c.

◆ ctx

struct GNUNET_SERVICE_Handle* ctx
static

Service context.

Definition at line 219 of file gnunet-service-testbed_barriers.c.

Referenced by remove_barrier().