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

program that tracks statistics More...

#include "platform.h"
#include "gnunet_bio_lib.h"
#include "gnunet_container_lib.h"
#include "gnunet_disk_lib.h"
#include "gnunet_getopt_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_service_lib.h"
#include "gnunet_statistics_service.h"
#include "gnunet_strings_lib.h"
#include "gnunet_time_lib.h"
#include "statistics.h"
Include dependency graph for gnunet-service-statistics.c:

Go to the source code of this file.

Data Structures

struct  WatchEntry
 Watch entry. More...
 
struct  StatsEntry
 Entry in the statistics list. More...
 
struct  SubsystemEntry
 We keep the statistics organized by subsystem for faster lookup during SET operations. More...
 
struct  ClientEntry
 Information about one of our clients. More...
 

Functions

static void save ()
 Write persistent statistics to disk. More...
 
static void transmit (struct ClientEntry *ce, const struct StatsEntry *e)
 Transmit the given stats value. More...
 
static void * client_connect_cb (void *cls, struct GNUNET_SERVICE_Client *c, struct GNUNET_MQ_Handle *mq)
 Callback called when a client connects to the service. More...
 
static int check_get (void *cls, const struct GNUNET_MessageHeader *message)
 Check integrity of GET-message. More...
 
static void handle_get (void *cls, const struct GNUNET_MessageHeader *message)
 Handle GET-message. More...
 
static void notify_change (struct StatsEntry *se)
 Notify all clients listening about a change to a value. More...
 
static struct SubsystemEntryfind_subsystem_entry (struct ClientEntry *ce, const char *service)
 Find the subsystem entry of the given name for the specified client. More...
 
static struct StatsEntryfind_stat_entry (struct SubsystemEntry *se, const char *name)
 Find the statistics entry of the given subsystem. More...
 
static int check_set (void *cls, const struct GNUNET_STATISTICS_SetMessage *msg)
 Check format of SET-message. More...
 
static void handle_set (void *cls, const struct GNUNET_STATISTICS_SetMessage *msg)
 Handle SET-message. More...
 
static int check_watch (void *cls, const struct GNUNET_MessageHeader *message)
 Check integrity of WATCH-message. More...
 
static void handle_watch (void *cls, const struct GNUNET_MessageHeader *message)
 Handle WATCH-message. More...
 
static void handle_disconnect (void *cls, const struct GNUNET_MessageHeader *message)
 Handle DISCONNECT-message. More...
 
static void do_shutdown ()
 Actually perform the shutdown. More...
 
static void shutdown_task (void *cls)
 Task run during shutdown. More...
 
static void client_disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_cls)
 A client disconnected. More...
 
static int inject_message (void *cls, const struct GNUNET_MessageHeader *message)
 We've read a struct GNUNET_STATISTICS_SetMessage * from disk. More...
 
static void load ()
 Load persistent values from disk. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
 Process statistics requests. More...
 
 GNUNET_SERVICE_MAIN ("statistics", GNUNET_SERVICE_OPTION_SOFT_SHUTDOWN, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_var_size(set, GNUNET_MESSAGE_TYPE_STATISTICS_SET, struct GNUNET_STATISTICS_SetMessage, NULL), GNUNET_MQ_hd_var_size(get, GNUNET_MESSAGE_TYPE_STATISTICS_GET, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_hd_var_size(watch, GNUNET_MESSAGE_TYPE_STATISTICS_WATCH, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_hd_fixed_size(disconnect, GNUNET_MESSAGE_TYPE_STATISTICS_DISCONNECT, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

static const struct GNUNET_CONFIGURATION_Handlecfg
 Our configuration. More...
 
static struct SubsystemEntrysub_head
 Head of linked list of subsystems with active statistics. More...
 
static struct SubsystemEntrysub_tail
 Tail of linked list of subsystems with active statistics. More...
 
static unsigned int client_count
 Number of connected clients. More...
 
static struct GNUNET_NotificationContextnc
 Our notification context. More...
 
static uint32_t uidgen
 Counter used to generate unique values. More...
 
static int in_shutdown
 Set to GNUNET_YES if we are shutting down as soon as possible. More...
 

Detailed Description

program that tracks statistics

Author
Christian Grothoff

Definition in file gnunet-service-statistics.c.

Function Documentation

◆ save()

static void save ( )
static

Write persistent statistics to disk.

Definition at line 239 of file gnunet-service-statistics.c.

References _, fn, GNUNET_assert, GNUNET_BIO_write(), GNUNET_BIO_write_close(), GNUNET_BIO_write_open(), GNUNET_break, GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONTAINER_DLL_remove, GNUNET_DISK_directory_create_for_file(), GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_free_non_null, GNUNET_htonll(), GNUNET_log, GNUNET_log_config_missing(), GNUNET_log_strerror_file, GNUNET_malloc, GNUNET_MESSAGE_TYPE_STATISTICS_SET, GNUNET_OK, GNUNET_STATISTICS_SETFLAG_PERSISTENT, GNUNET_STRINGS_buffer_fill(), GNUNET_STATISTICS_SetMessage::header, msg, StatsEntry::name, StatsEntry::persistent, SubsystemEntry::service, size, GNUNET_MessageHeader::size, SubsystemEntry::stat_head, SubsystemEntry::stat_tail, GNUNET_MessageHeader::type, StatsEntry::value, and wh.

Referenced by do_shutdown(), and GNUNET_STRINGS_parse_ipv6_policy().

240 {
241  struct SubsystemEntry *se;
242  struct StatsEntry *pos;
243  char *fn;
244  struct GNUNET_BIO_WriteHandle *wh;
245  uint16_t size;
246  unsigned long long total;
247  size_t nlen;
248  size_t slen;
250 
252  "STATISTICS",
253  "DATABASE",
254  &fn))
255  {
257  "STATISTICS",
258  "DATABASE");
259  return;
260  }
262  wh = GNUNET_BIO_write_open(fn);
263  total = 0;
264  while (NULL != (se = sub_head))
265  {
267  slen = strlen(se->service) + 1;
268  while (NULL != (pos = se->stat_head))
269  {
271  if ((pos->persistent) && (NULL != wh))
272  {
273  nlen = strlen(pos->name) + 1;
274  size = sizeof(struct GNUNET_STATISTICS_SetMessage) + nlen + slen;
275  GNUNET_assert(size < UINT16_MAX);
276  msg = GNUNET_malloc(size);
277 
278  msg->header.size = htons((uint16_t)size);
280  GNUNET_assert(nlen + slen ==
281  GNUNET_STRINGS_buffer_fill((char *)&msg[1],
282  nlen + slen,
283  2,
284  se->service,
285  pos->name));
286  msg->flags =
288  msg->value = GNUNET_htonll(pos->value);
289  if (GNUNET_OK != GNUNET_BIO_write(wh, msg, size))
290  {
294  wh = NULL;
295  }
296  else
297  {
298  total += size;
299  }
300  GNUNET_free(msg);
301  }
302  GNUNET_free(pos);
303  }
304  GNUNET_free(se);
305  }
306  if (NULL != wh)
307  {
310  if (0 == total)
311  GNUNET_break(0 == unlink(fn));
312  else
314  _("Wrote %llu bytes of statistics to `%s'\n"),
315  total,
316  fn);
317  }
319 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
struct StatsEntry * stat_head
Head of list of values kept for this subsystem.
#define GNUNET_MESSAGE_TYPE_STATISTICS_SET
Set a statistical value.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
const char * service
Name of the subsystem this entry is for, allocated at the end of this struct, do not free()...
uint64_t value
Our value.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int GNUNET_DISK_directory_create_for_file(const char *filename)
Create the directory structure for storing a file.
Definition: disk.c:681
Message to set a statistic.
Definition: statistics.h:90
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
uint16_t type
The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
We keep the statistics organized by subsystem for faster lookup during SET operations.
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
static struct SubsystemEntry * sub_tail
Tail of linked list of subsystems with active statistics.
static char * fn
Filename of the unique file.
size_t GNUNET_STRINGS_buffer_fill(char *buffer, size_t size, unsigned int count,...)
Fill a buffer of the given size with count 0-terminated strings (given as varargs).
Definition: strings.c:65
int persistent
Is this value persistent?
Handle for buffered writing.
Definition: bio.c:378
uint64_t GNUNET_htonll(uint64_t n)
Convert unsigned 64-bit integer to network byte order.
Definition: common_endian.c:35
static unsigned int size
Size of the "table".
Definition: peer.c:66
Entry in the statistics list.
static struct GNUNET_TESTBED_BarrierWaitHandle * wh
Our barrier wait handle.
static struct SubsystemEntry * sub_head
Head of linked list of subsystems with active statistics.
int GNUNET_BIO_write_close(struct GNUNET_BIO_WriteHandle *h)
Close an open file for writing.
Definition: bio.c:436
const char * name
Name for the value stored by this entry, allocated at the end of this struct.
uint32_t flags
0 for absolute value, 1 for relative value; 2 to make persistent (see GNUNET_STATISTICS_SETFLAG_*).
Definition: statistics.h:100
struct StatsEntry * stat_tail
Tail of list of values kept for this subsystem.
struct GNUNET_BIO_WriteHandle * GNUNET_BIO_write_open(const char *fn)
Open a file for writing.
Definition: bio.c:408
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_STATISTICS_SET.
Definition: statistics.h:94
#define GNUNET_log(kind,...)
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
int GNUNET_BIO_write(struct GNUNET_BIO_WriteHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: bio.c:481
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
#define GNUNET_malloc(size)
Wrapper around malloc.
#define GNUNET_STATISTICS_SETFLAG_PERSISTENT
The value being set is to be persistent (note that this bit can be combined with GNUNET_STATISTICS_SE...
Definition: statistics.h:82
#define GNUNET_free(ptr)
Wrapper around free.
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◆ transmit()

static void transmit ( struct ClientEntry ce,
const struct StatsEntry e 
)
static

Transmit the given stats value.

Parameters
clientreceiver of the value
evalue to transmit

Definition at line 329 of file gnunet-service-statistics.c.

References env, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_htonll(), GNUNET_log, GNUNET_MAX_MESSAGE_SIZE, GNUNET_MESSAGE_TYPE_STATISTICS_VALUE, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_STATISTICS_PERSIST_BIT, GNUNET_STRINGS_buffer_fill(), m, ClientEntry::mq, StatsEntry::name, StatsEntry::persistent, SubsystemEntry::service, size, StatsEntry::subsystem, GNUNET_STATISTICS_ReplyMessage::uid, StatsEntry::uid, GNUNET_STATISTICS_ReplyMessage::value, and StatsEntry::value.

Referenced by handle_get().

330 {
331  struct GNUNET_MQ_Envelope *env;
333  size_t size;
334 
335  size = strlen(e->subsystem->service) + 1 + strlen(e->name) + 1;
338  m->uid = htonl(e->uid);
339  if (e->persistent)
340  m->uid |= htonl(GNUNET_STATISTICS_PERSIST_BIT);
341  m->value = GNUNET_htonll(e->value);
342  GNUNET_assert(size == GNUNET_STRINGS_buffer_fill((char *)&m[1],
343  size,
344  2,
345  e->subsystem->service,
346  e->name));
348  "Transmitting value for `%s:%s' (%d): %llu\n",
349  e->subsystem->service,
350  e->name,
351  e->persistent,
352  (unsigned long long)e->value);
353  GNUNET_MQ_send(ce->mq, env);
354 }
const char * service
Name of the subsystem this entry is for, allocated at the end of this struct, do not free()...
uint64_t value
Our value.
Statistics message.
Definition: statistics.h:40
uint32_t uid
Unique numerical identifier for the value (will not change during the same client-session).
Definition: statistics.h:52
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_MESSAGE_TYPE_STATISTICS_VALUE
Response to a STATISTICS_GET message (with value).
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:99
#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
size_t GNUNET_STRINGS_buffer_fill(char *buffer, size_t size, unsigned int count,...)
Fill a buffer of the given size with count 0-terminated strings (given as varargs).
Definition: strings.c:65
int persistent
Is this value persistent?
uint64_t GNUNET_htonll(uint64_t n)
Convert unsigned 64-bit integer to network byte order.
Definition: common_endian.c:35
static unsigned int size
Size of the "table".
Definition: peer.c:66
struct GNUNET_MQ_Handle * mq
Queue for transmissions to client.
#define GNUNET_STATISTICS_PERSIST_BIT
Flag for the struct GNUNET_STATISTICS_ReplyMessage UID only.
Definition: statistics.h:64
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
const char * name
Name for the value stored by this entry, allocated at the end of this struct.
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message...
#define GNUNET_log(kind,...)
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
uint32_t uid
Unique ID.
struct SubsystemEntry * subsystem
Subsystem this entry belongs to.
uint64_t value
The value.
Definition: statistics.h:57
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◆ client_connect_cb()

static void* client_connect_cb ( void *  cls,
struct GNUNET_SERVICE_Client c,
struct GNUNET_MQ_Handle mq 
)
static

Callback called when a client connects to the service.

Parameters
clsclosure for the service
cthe new client that connected to the service
mqthe message queue used to send messages to the client
Returns
c

Definition at line 366 of file gnunet-service-statistics.c.

References WatchEntry::ce, ClientEntry::client, client_count, GNUNET_new, GNUNET_notification_context_add(), mq, and ClientEntry::mq.

Referenced by run().

369 {
370  struct ClientEntry *ce;
371 
372  ce = GNUNET_new(struct ClientEntry);
373  ce->client = c;
374  ce->mq = mq;
375  client_count++;
377  return ce;
378 }
static unsigned int client_count
Number of connected clients.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GNUNET_notification_context_add(struct GNUNET_NotificationContext *nc, struct GNUNET_MQ_Handle *mq)
Add a subscriber to the notification context.
Definition: nc.c:158
struct GNUNET_SERVICE_Client * client
Handle identifying the client.
Information about one of our clients.
struct GNUNET_MQ_Handle * mq
Queue for transmissions to client.
static struct GNUNET_NotificationContext * nc
Our notification context.
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
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◆ check_get()

static int check_get ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

Check integrity of GET-message.

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

Definition at line 389 of file gnunet-service-statistics.c.

References GNUNET_break, GNUNET_OK, GNUNET_STRINGS_buffer_tokenize(), GNUNET_SYSERR, name, service, size, and GNUNET_MessageHeader::size.

390 {
391  const char *service;
392  const char *name;
393  size_t size;
394 
395  size = ntohs(message->size) - sizeof(struct GNUNET_MessageHeader);
396  if (size != GNUNET_STRINGS_buffer_tokenize((const char *)&message[1],
397  size,
398  2,
399  &service,
400  &name))
401  {
402  GNUNET_break(0);
403  return GNUNET_SYSERR;
404  }
405  return GNUNET_OK;
406 }
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
unsigned int GNUNET_STRINGS_buffer_tokenize(const char *buffer, size_t size, unsigned int count,...)
Given a buffer of a given size, find "count" 0-terminated strings in the buffer and assign the count ...
Definition: strings.c:135
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
static unsigned int size
Size of the "table".
Definition: peer.c:66
const char * name
Header for all communications.
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◆ handle_get()

static void handle_get ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

Handle GET-message.

Parameters
clsidentification of the client
messagethe actual message

Definition at line 416 of file gnunet-service-statistics.c.

References WatchEntry::ce, ClientEntry::client, end, env, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSAGE_TYPE_STATISTICS_END, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_SERVICE_client_continue(), GNUNET_STRINGS_buffer_tokenize(), ClientEntry::mq, StatsEntry::name, name, StatsEntry::next, SubsystemEntry::next, SubsystemEntry::service, service, size, GNUNET_MessageHeader::size, SubsystemEntry::stat_head, and transmit().

417 {
418  struct ClientEntry *ce = cls;
419  struct GNUNET_MQ_Envelope *env;
420  struct GNUNET_MessageHeader *end;
421  const char *service;
422  const char *name;
423  size_t slen;
424  size_t nlen;
425  struct SubsystemEntry *se;
426  struct StatsEntry *pos;
427  size_t size;
428 
429  size = ntohs(message->size) - sizeof(struct GNUNET_MessageHeader);
430  GNUNET_assert(size ==
431  GNUNET_STRINGS_buffer_tokenize((const char *)&message[1],
432  size,
433  2,
434  &service,
435  &name));
436  slen = strlen(service);
437  nlen = strlen(name);
439  "Received request for statistics on `%s:%s'\n",
440  slen ? service : "*",
441  nlen ? name : "*");
442  for (se = sub_head; NULL != se; se = se->next)
443  {
444  if (!((0 == slen) || (0 == strcmp(service, se->service))))
445  continue;
446  for (pos = se->stat_head; NULL != pos; pos = pos->next)
447  {
448  if (!((0 == nlen) || (0 == strcmp(name, pos->name))))
449  continue;
450  transmit(ce, pos);
451  }
452  }
454  GNUNET_MQ_send(ce->mq, env);
456 }
struct StatsEntry * stat_head
Head of list of values kept for this subsystem.
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
const char * service
Name of the subsystem this entry is for, allocated at the end of this struct, do not free()...
#define GNUNET_MESSAGE_TYPE_STATISTICS_END
Response to a STATISTICS_GET message (end of value stream).
static int end
Set if we are to shutdown all services (including ARM).
Definition: gnunet-arm.c:34
struct StatsEntry * next
This is a linked list.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
struct GNUNET_SERVICE_Client * client
Handle identifying the client.
struct SubsystemEntry * next
Subsystems are kept in a DLL.
unsigned int GNUNET_STRINGS_buffer_tokenize(const char *buffer, size_t size, unsigned int count,...)
Given a buffer of a given size, find "count" 0-terminated strings in the buffer and assign the count ...
Definition: strings.c:135
We keep the statistics organized by subsystem for faster lookup during SET operations.
Information about one of our clients.
static void transmit(struct ClientEntry *ce, const struct StatsEntry *e)
Transmit the given stats value.
static unsigned int size
Size of the "table".
Definition: peer.c:66
struct GNUNET_MQ_Handle * mq
Queue for transmissions to client.
const char * name
Entry in the statistics list.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static struct SubsystemEntry * sub_head
Head of linked list of subsystems with active statistics.
const char * name
Name for the value stored by this entry, allocated at the end of this struct.
#define GNUNET_log(kind,...)
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:351
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2234
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◆ notify_change()

static void notify_change ( struct StatsEntry se)
static

Notify all clients listening about a change to a value.

Parameters
sevalue that changed

Definition at line 465 of file gnunet-service-statistics.c.

References WatchEntry::ce, env, GNUNET_STATISTICS_WatchValueMessage::flags, GNUNET_htonll(), GNUNET_MESSAGE_TYPE_STATISTICS_WATCH_VALUE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_STATISTICS_SETFLAG_PERSISTENT, GNUNET_YES, WatchEntry::last_value, WatchEntry::last_value_set, ClientEntry::mq, WatchEntry::next, StatsEntry::persistent, GNUNET_STATISTICS_WatchValueMessage::reserved, StatsEntry::value, GNUNET_STATISTICS_WatchValueMessage::value, StatsEntry::we_head, WatchEntry::wid, and GNUNET_STATISTICS_WatchValueMessage::wid.

Referenced by handle_set(), and handle_watch().

466 {
467  struct GNUNET_MQ_Envelope *env;
469  struct WatchEntry *pos;
470 
471  for (pos = se->we_head; NULL != pos; pos = pos->next)
472  {
473  if (GNUNET_YES == pos->last_value_set)
474  {
475  if (pos->last_value == se->value)
476  continue;
477  }
478  else
479  {
480  pos->last_value_set = GNUNET_YES;
481  }
483  wvm->flags =
485  wvm->wid = htonl(pos->wid);
486  wvm->reserved = htonl(0);
487  wvm->value = GNUNET_htonll(se->value);
488  GNUNET_MQ_send(pos->ce->mq, env);
489  pos->last_value = se->value;
490  }
491 }
uint64_t value
Our value.
struct WatchEntry * we_head
Watch context for changes to this value, or NULL for none.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
uint32_t flags
0 for absolute value, 1 for relative value; 2 to make persistent (see GNUNET_STATISTICS_SETFLAG_*).
Definition: statistics.h:123
uint32_t reserved
Reserved (always 0).
Definition: statistics.h:136
Message transmitted if a watched value changes.
Definition: statistics.h:113
uint32_t wid
Unique watch number for this client and this watched value.
int last_value_set
Is last_value valid GNUNET_NO : last_value is n/a, GNUNET_YES: last_value is valid.
#define GNUNET_MESSAGE_TYPE_STATISTICS_WATCH_VALUE
Changes to a watched value.
int persistent
Is this value persistent?
uint32_t wid
Unique watch identification number (watch requests are enumerated in the order they are received...
Definition: statistics.h:131
uint64_t GNUNET_htonll(uint64_t n)
Convert unsigned 64-bit integer to network byte order.
Definition: common_endian.c:35
uint64_t last_value
Last value we communicated to the client for this watch entry.
struct GNUNET_MQ_Handle * mq
Queue for transmissions to client.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct ClientEntry * ce
For which client is this watch entry?
#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 WatchEntry * next
Watch entries are kept in a linked list.
#define GNUNET_STATISTICS_SETFLAG_PERSISTENT
The value being set is to be persistent (note that this bit can be combined with GNUNET_STATISTICS_SE...
Definition: statistics.h:82
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◆ find_subsystem_entry()

static struct SubsystemEntry* find_subsystem_entry ( struct ClientEntry ce,
const char *  service 
)
static

Find the subsystem entry of the given name for the specified client.

Parameters
ceclient looking for the subsystem, may contain a hint to find the entry faster, can be NULL
servicename of the subsystem to look for
Returns
subsystem entry, never NULL (subsystem entry is created if necessary)

Definition at line 503 of file gnunet-service-statistics.c.

References GNUNET_CONTAINER_DLL_insert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_malloc, GNUNET_memcpy, SubsystemEntry::next, SubsystemEntry::service, and ClientEntry::subsystem.

Referenced by handle_set(), and handle_watch().

504 {
505  size_t slen;
506  struct SubsystemEntry *se;
507 
508  if (NULL != ce)
509  se = ce->subsystem;
510  else
511  se = NULL;
512  if ((NULL == se) || (0 != strcmp(service, se->service)))
513  {
514  for (se = sub_head; NULL != se; se = se->next)
515  if (0 == strcmp(service, se->service))
516  break;
517  if (NULL != ce)
518  ce->subsystem = se;
519  }
520  if (NULL != se)
521  return se;
523  "Allocating new subsystem entry `%s'\n",
524  service);
525  slen = strlen(service) + 1;
526  se = GNUNET_malloc(sizeof(struct SubsystemEntry) + slen);
527  GNUNET_memcpy(&se[1], service, slen);
528  se->service = (const char *)&se[1];
530  if (NULL != ce)
531  ce->subsystem = se;
532  return se;
533 }
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
const char * service
Name of the subsystem this entry is for, allocated at the end of this struct, do not free()...
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
struct SubsystemEntry * subsystem
Which subsystem is this client writing to (SET/UPDATE)?
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
struct SubsystemEntry * next
Subsystems are kept in a DLL.
We keep the statistics organized by subsystem for faster lookup during SET operations.
static struct SubsystemEntry * sub_tail
Tail of linked list of subsystems with active statistics.
static struct SubsystemEntry * sub_head
Head of linked list of subsystems with active statistics.
#define GNUNET_log(kind,...)
#define GNUNET_malloc(size)
Wrapper around malloc.
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◆ find_stat_entry()

static struct StatsEntry* find_stat_entry ( struct SubsystemEntry se,
const char *  name 
)
static

Find the statistics entry of the given subsystem.

Parameters
subsystemsubsystem to look in
namename of the entry to look for
Returns
statistis entry, or NULL if not found

Definition at line 544 of file gnunet-service-statistics.c.

References StatsEntry::name, StatsEntry::next, and SubsystemEntry::stat_head.

Referenced by handle_set(), and handle_watch().

545 {
546  struct StatsEntry *pos;
547 
548  for (pos = se->stat_head; NULL != pos; pos = pos->next)
549  if (0 == strcmp(name, pos->name))
550  return pos;
551  return NULL;
552 }
struct StatsEntry * stat_head
Head of list of values kept for this subsystem.
struct StatsEntry * next
This is a linked list.
const char * name
Entry in the statistics list.
const char * name
Name for the value stored by this entry, allocated at the end of this struct.
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◆ check_set()

static int check_set ( void *  cls,
const struct GNUNET_STATISTICS_SetMessage msg 
)
static

Check format of SET-message.

Parameters
clsthe struct ClientEntry
messagethe actual message
Returns
GNUNET_OK if message is well-formed

Definition at line 563 of file gnunet-service-statistics.c.

References GNUNET_break, GNUNET_OK, GNUNET_STRINGS_buffer_tokenize(), GNUNET_SYSERR, GNUNET_STATISTICS_SetMessage::header, name, service, and GNUNET_MessageHeader::size.

Referenced by inject_message().

564 {
565  const char *service;
566  const char *name;
567  size_t msize;
568 
569  msize = ntohs(msg->header.size) - sizeof(*msg);
570  if (msize != GNUNET_STRINGS_buffer_tokenize((const char *)&msg[1],
571  msize,
572  2,
573  &service,
574  &name))
575  {
576  GNUNET_break(0);
577  return GNUNET_SYSERR;
578  }
579  return GNUNET_OK;
580 }
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
unsigned int GNUNET_STRINGS_buffer_tokenize(const char *buffer, size_t size, unsigned int count,...)
Given a buffer of a given size, find "count" 0-terminated strings in the buffer and assign the count ...
Definition: strings.c:135
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
const char * name
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_STATISTICS_SET.
Definition: statistics.h:94
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◆ handle_set()

static void handle_set ( void *  cls,
const struct GNUNET_STATISTICS_SetMessage msg 
)
static

Handle SET-message.

Parameters
clsthe struct ClientEntry
messagethe actual message

Definition at line 590 of file gnunet-service-statistics.c.

References WatchEntry::ce, ClientEntry::client, delta, find_stat_entry(), find_subsystem_entry(), GNUNET_assert, GNUNET_break, GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_malloc, GNUNET_memcpy, GNUNET_NO, GNUNET_ntohll(), GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_SETFLAG_PERSISTENT, GNUNET_STATISTICS_SETFLAG_RELATIVE, GNUNET_STRINGS_buffer_tokenize(), GNUNET_YES, GNUNET_STATISTICS_SetMessage::header, StatsEntry::name, name, notify_change(), StatsEntry::persistent, service, StatsEntry::set, size, GNUNET_MessageHeader::size, SubsystemEntry::stat_head, SubsystemEntry::stat_tail, StatsEntry::subsystem, StatsEntry::uid, uidgen, StatsEntry::value, and value.

Referenced by inject_message().

591 {
592  struct ClientEntry *ce = cls;
593  const char *service;
594  const char *name;
595  size_t nlen;
596  uint16_t msize;
597  uint16_t size;
598  struct SubsystemEntry *se;
599  struct StatsEntry *pos;
600  uint32_t flags;
601  uint64_t value;
602  int64_t delta;
603  int changed;
604  int initial_set;
605 
606  msize = ntohs(msg->header.size);
607  size = msize - sizeof(struct GNUNET_STATISTICS_SetMessage);
608  GNUNET_assert(size == GNUNET_STRINGS_buffer_tokenize((const char *)&msg[1],
609  size,
610  2,
611  &service,
612  &name));
613  se = find_subsystem_entry(ce, service);
614  flags = ntohl(msg->flags);
615  value = GNUNET_ntohll(msg->value);
617  "Received request to update statistic on `%s:%s' (%u) to/by %llu\n",
618  service,
619  name,
620  (unsigned int)flags,
621  (unsigned long long)value);
622  pos = find_stat_entry(se, name);
623  if (NULL != pos)
624  {
625  initial_set = 0;
626  if (0 == (flags & GNUNET_STATISTICS_SETFLAG_RELATIVE))
627  {
628  changed = (pos->value != value);
629  pos->value = value;
630  }
631  else
632  {
633  delta = (int64_t)value;
634  if ((delta < 0) && (pos->value < -delta))
635  {
636  changed = (0 != pos->value);
637  pos->value = 0;
638  }
639  else
640  {
641  changed = (0 != delta);
642  GNUNET_break((delta <= 0) || (pos->value + delta > pos->value));
643  pos->value += delta;
644  }
645  }
646  if (GNUNET_NO == pos->set)
647  {
648  pos->set = GNUNET_YES;
649  initial_set = 1;
650  }
651  pos->persistent = (0 != (flags & GNUNET_STATISTICS_SETFLAG_PERSISTENT));
652  if (pos != se->stat_head)
653  {
654  /* move to front for faster setting next time! */
657  }
659  "Statistic `%s:%s' updated to value %llu (%d).\n",
660  service,
661  name,
662  (unsigned long long)pos->value,
663  pos->persistent);
664  if ((changed) || (1 == initial_set))
665  notify_change(pos);
667  return;
668  }
669  /* not found, create a new entry */
670  nlen = strlen(name) + 1;
671  pos = GNUNET_malloc(sizeof(struct StatsEntry) + nlen);
672  GNUNET_memcpy(&pos[1], name, nlen);
673  pos->name = (const char *)&pos[1];
674  pos->subsystem = se;
675  if ((0 == (flags & GNUNET_STATISTICS_SETFLAG_RELATIVE)) ||
676  (0 < (int64_t)GNUNET_ntohll(msg->value)))
677  {
678  pos->value = GNUNET_ntohll(msg->value);
679  pos->set = GNUNET_YES;
680  }
681  else
682  {
683  pos->set = GNUNET_NO;
684  }
685  pos->uid = uidgen++;
686  pos->persistent = (0 != (flags & GNUNET_STATISTICS_SETFLAG_PERSISTENT));
689  "New statistic on `%s:%s' with value %llu created.\n",
690  service,
691  name,
692  (unsigned long long)pos->value);
693  if (NULL != ce)
695 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
struct StatsEntry * stat_head
Head of list of values kept for this subsystem.
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
static struct GNUNET_TIME_Relative delta
Definition: speedup.c:35
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
uint64_t value
Our value.
static void notify_change(struct StatsEntry *se)
Notify all clients listening about a change to a value.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
Message to set a statistic.
Definition: statistics.h:90
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_STATISTICS_SETFLAG_RELATIVE
The value being set is a relative change.
Definition: statistics.h:74
struct GNUNET_SERVICE_Client * client
Handle identifying the client.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
unsigned int GNUNET_STRINGS_buffer_tokenize(const char *buffer, size_t size, unsigned int count,...)
Given a buffer of a given size, find "count" 0-terminated strings in the buffer and assign the count ...
Definition: strings.c:135
We keep the statistics organized by subsystem for faster lookup during SET operations.
static char * value
Value of the record to add/remove.
Information about one of our clients.
int persistent
Is this value persistent?
static unsigned int size
Size of the "table".
Definition: peer.c:66
static uint32_t uidgen
Counter used to generate unique values.
const char * name
Entry in the statistics list.
const char * name
Name for the value stored by this entry, allocated at the end of this struct.
int set
Is this value set? GNUNET_NO: value is n/a, GNUNET_YES: value is valid.
uint32_t flags
0 for absolute value, 1 for relative value; 2 to make persistent (see GNUNET_STATISTICS_SETFLAG_*).
Definition: statistics.h:100
struct StatsEntry * stat_tail
Tail of list of values kept for this subsystem.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_STATISTICS_SET.
Definition: statistics.h:94
#define GNUNET_log(kind,...)
static struct StatsEntry * find_stat_entry(struct SubsystemEntry *se, const char *name)
Find the statistics entry of the given subsystem.
#define GNUNET_YES
Definition: gnunet_common.h:77
uint32_t uid
Unique ID.
struct SubsystemEntry * subsystem
Subsystem this entry belongs to.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2234
#define GNUNET_malloc(size)
Wrapper around malloc.
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:48
#define GNUNET_STATISTICS_SETFLAG_PERSISTENT
The value being set is to be persistent (note that this bit can be combined with GNUNET_STATISTICS_SE...
Definition: statistics.h:82
static struct SubsystemEntry * find_subsystem_entry(struct ClientEntry *ce, const char *service)
Find the subsystem entry of the given name for the specified client.
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◆ check_watch()

static int check_watch ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

Check integrity of WATCH-message.

Parameters
clsthe struct ClientEntry *
messagethe actual message
Returns
GNUNET_OK if message is well-formed

Definition at line 706 of file gnunet-service-statistics.c.

References GNUNET_break, GNUNET_OK, GNUNET_STRINGS_buffer_tokenize(), GNUNET_SYSERR, name, service, size, and GNUNET_MessageHeader::size.

707 {
708  size_t size;
709  const char *service;
710  const char *name;
711 
712  size = ntohs(message->size) - sizeof(struct GNUNET_MessageHeader);
713  if (size != GNUNET_STRINGS_buffer_tokenize((const char *)&message[1],
714  size,
715  2,
716  &service,
717  &name))
718  {
719  GNUNET_break(0);
720  return GNUNET_SYSERR;
721  }
722  return GNUNET_OK;
723 }
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
unsigned int GNUNET_STRINGS_buffer_tokenize(const char *buffer, size_t size, unsigned int count,...)
Given a buffer of a given size, find "count" 0-terminated strings in the buffer and assign the count ...
Definition: strings.c:135
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
static unsigned int size
Size of the "table".
Definition: peer.c:66
const char * name
Header for all communications.
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◆ handle_watch()

static void handle_watch ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

Handle WATCH-message.

Parameters
clsthe struct ClientEntry *
messagethe actual message

Definition at line 733 of file gnunet-service-statistics.c.

References WatchEntry::ce, ClientEntry::client, find_stat_entry(), find_subsystem_entry(), GNUNET_assert, GNUNET_CONTAINER_DLL_insert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_malloc, GNUNET_memcpy, GNUNET_new, GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_SERVICE_client_mark_monitor(), GNUNET_STRINGS_buffer_tokenize(), WatchEntry::last_value_set, ClientEntry::max_wid, StatsEntry::name, name, notify_change(), service, StatsEntry::set, size, GNUNET_MessageHeader::size, SubsystemEntry::stat_head, SubsystemEntry::stat_tail, StatsEntry::subsystem, StatsEntry::uid, uidgen, StatsEntry::value, StatsEntry::we_head, StatsEntry::we_tail, and WatchEntry::wid.

734 {
735  struct ClientEntry *ce = cls;
736  const char *service;
737  const char *name;
738  uint16_t msize;
739  uint16_t size;
740  struct SubsystemEntry *se;
741  struct StatsEntry *pos;
742  struct WatchEntry *we;
743  size_t nlen;
744 
745  if (NULL == nc)
746  {
748  return;
749  }
751  msize = ntohs(message->size);
752  size = msize - sizeof(struct GNUNET_MessageHeader);
753  GNUNET_assert(size ==
754  GNUNET_STRINGS_buffer_tokenize((const char *)&message[1],
755  size,
756  2,
757  &service,
758  &name));
760  "Received request to watch statistic on `%s:%s'\n",
761  service,
762  name);
763  se = find_subsystem_entry(ce, service);
764  pos = find_stat_entry(se, name);
765  if (NULL == pos)
766  {
767  nlen = strlen(name) + 1;
768  pos = GNUNET_malloc(sizeof(struct StatsEntry) + nlen);
769  GNUNET_memcpy(&pos[1], name, nlen);
770  pos->name = (const char *)&pos[1];
771  pos->subsystem = se;
773  pos->uid = uidgen++;
774  pos->set = GNUNET_NO;
776  "New statistic on `%s:%s' with value %llu created.\n",
777  service,
778  name,
779  (unsigned long long)pos->value);
780  }
781  we = GNUNET_new(struct WatchEntry);
782  we->ce = ce;
784  we->wid = ce->max_wid++;
786  if (0 != pos->value)
787  notify_change(pos);
789 }
struct StatsEntry * stat_head
Head of list of values kept for this subsystem.
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
uint64_t value
Our value.
static void notify_change(struct StatsEntry *se)
Notify all clients listening about a change to a value.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct WatchEntry * we_head
Watch context for changes to this value, or NULL for none.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_new(type)
Allocate a struct or union of the given type.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
struct GNUNET_SERVICE_Client * client
Handle identifying the client.
unsigned int GNUNET_STRINGS_buffer_tokenize(const char *buffer, size_t size, unsigned int count,...)
Given a buffer of a given size, find "count" 0-terminated strings in the buffer and assign the count ...
Definition: strings.c:135
struct WatchEntry * we_tail
Watch context for changes to this value, or NULL for none.
We keep the statistics organized by subsystem for faster lookup during SET operations.
uint32_t wid
Unique watch number for this client and this watched value.
Information about one of our clients.
int last_value_set
Is last_value valid GNUNET_NO : last_value is n/a, GNUNET_YES: last_value is valid.
void GNUNET_SERVICE_client_mark_monitor(struct GNUNET_SERVICE_Client *c)
Set the &#39;monitor&#39; flag on this client.
Definition: service.c:2394
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2315
static unsigned int size
Size of the "table".
Definition: peer.c:66
static uint32_t uidgen
Counter used to generate unique values.
const char * name
Entry in the statistics list.
struct ClientEntry * ce
For which client is this watch entry?
const char * name
Name for the value stored by this entry, allocated at the end of this struct.
int set
Is this value set? GNUNET_NO: value is n/a, GNUNET_YES: value is valid.
static struct GNUNET_NotificationContext * nc
Our notification context.
struct StatsEntry * stat_tail
Tail of list of values kept for this subsystem.
#define GNUNET_log(kind,...)
static struct StatsEntry * find_stat_entry(struct SubsystemEntry *se, const char *name)
Find the statistics entry of the given subsystem.
Header for all communications.
uint32_t uid
Unique ID.
struct SubsystemEntry * subsystem
Subsystem this entry belongs to.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2234
uint32_t max_wid
Maximum watch ID used by this client so far.
#define GNUNET_malloc(size)
Wrapper around malloc.
static struct SubsystemEntry * find_subsystem_entry(struct ClientEntry *ce, const char *service)
Find the subsystem entry of the given name for the specified client.
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◆ handle_disconnect()

static void handle_disconnect ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

Handle DISCONNECT-message.

Sync to disk and send back a GNUNET_MESSAGE_TYPE_STATISTICS_DISCONNECT_CONFIRM message.

Parameters
clsthe struct ClientEntry *
messagethe actual message

Definition at line 801 of file gnunet-service-statistics.c.

References WatchEntry::ce, ClientEntry::client, env, GNUNET_MESSAGE_TYPE_STATISTICS_DISCONNECT_CONFIRM, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_SERVICE_client_continue(), ClientEntry::mq, and msg.

802 {
803  struct ClientEntry *ce = cls;
804  struct GNUNET_MQ_Envelope *env;
805  struct GNUNET_MessageHeader *msg;
806 
808  GNUNET_MQ_send(ce->mq, env);
810 }
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
struct GNUNET_SERVICE_Client * client
Handle identifying the client.
#define GNUNET_MESSAGE_TYPE_STATISTICS_DISCONNECT_CONFIRM
Service confirms disconnect and that it is done processing all requests from the client.
Information about one of our clients.
struct GNUNET_MQ_Handle * mq
Queue for transmissions to client.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
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:351
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2234
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◆ do_shutdown()

static void do_shutdown ( )
static

Actually perform the shutdown.

Definition at line 817 of file gnunet-service-statistics.c.

References client_count, GNUNET_assert, GNUNET_break, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_notification_context_destroy(), save(), SubsystemEntry::stat_head, SubsystemEntry::stat_tail, StatsEntry::we_head, and StatsEntry::we_tail.

Referenced by client_disconnect_cb(), and shutdown_task().

818 {
819  struct WatchEntry *we;
820  struct StatsEntry *pos;
821  struct SubsystemEntry *se;
822 
823  if (NULL == nc)
824  return;
825  save();
827  nc = NULL;
829  while (NULL != (se = sub_head))
830  {
832  while (NULL != (pos = se->stat_head))
833  {
835  while (NULL != (we = pos->we_head))
836  {
837  GNUNET_break(0);
839  GNUNET_free(we);
840  }
841  GNUNET_free(pos);
842  }
843  GNUNET_free(se);
844  }
845 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
struct StatsEntry * stat_head
Head of list of values kept for this subsystem.
static unsigned int client_count
Number of connected clients.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct WatchEntry * we_head
Watch context for changes to this value, or NULL for none.
static void save()
Write persistent statistics to disk.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
struct WatchEntry * we_tail
Watch context for changes to this value, or NULL for none.
We keep the statistics organized by subsystem for faster lookup during SET operations.
static struct SubsystemEntry * sub_tail
Tail of linked list of subsystems with active statistics.
Entry in the statistics list.
static struct SubsystemEntry * sub_head
Head of linked list of subsystems with active statistics.
static struct GNUNET_NotificationContext * nc
Our notification context.
struct StatsEntry * stat_tail
Tail of list of values kept for this subsystem.
void GNUNET_notification_context_destroy(struct GNUNET_NotificationContext *nc)
Destroy the context, force disconnect for all subscribers.
Definition: nc.c:135
#define GNUNET_free(ptr)
Wrapper around free.
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◆ shutdown_task()

static void shutdown_task ( void *  cls)
static

Task run during shutdown.

Parameters
clsunused

Definition at line 854 of file gnunet-service-statistics.c.

References client_count, do_shutdown(), GNUNET_YES, and in_shutdown.

Referenced by run().

855 {
857  if (0 != client_count)
858  return;
859  do_shutdown();
860 }
static unsigned int client_count
Number of connected clients.
static int in_shutdown
Set to GNUNET_YES if we are shutting down as soon as possible.
static void do_shutdown()
Actually perform the shutdown.
#define GNUNET_YES
Definition: gnunet_common.h:77
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◆ client_disconnect_cb()

static void client_disconnect_cb ( void *  cls,
struct GNUNET_SERVICE_Client client,
void *  app_cls 
)
static

A client disconnected.

Remove all of its data structure entries.

Parameters
clsclosure, NULL
clientidentification of the client
app_clsthe struct ClientEntry *

Definition at line 871 of file gnunet-service-statistics.c.

References WatchEntry::ce, client_count, do_shutdown(), GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_YES, in_shutdown, WatchEntry::next, StatsEntry::next, SubsystemEntry::next, SubsystemEntry::stat_head, StatsEntry::we_head, and StatsEntry::we_tail.

Referenced by run().

874 {
875  struct ClientEntry *ce = app_cls;
876  struct WatchEntry *we;
877  struct WatchEntry *wen;
878  struct StatsEntry *pos;
879  struct SubsystemEntry *se;
880 
881  client_count--;
882  for (se = sub_head; NULL != se; se = se->next)
883  {
884  for (pos = se->stat_head; NULL != pos; pos = pos->next)
885  {
886  wen = pos->we_head;
887  while (NULL != (we = wen))
888  {
889  wen = we->next;
890  if (we->ce != ce)
891  continue;
893  GNUNET_free(we);
894  }
895  }
896  }
897  GNUNET_free(ce);
898  if ((0 == client_count) && (GNUNET_YES == in_shutdown))
899  do_shutdown();
900 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
struct StatsEntry * stat_head
Head of list of values kept for this subsystem.
static unsigned int client_count
Number of connected clients.
struct StatsEntry * next
This is a linked list.
struct WatchEntry * we_head
Watch context for changes to this value, or NULL for none.
static int in_shutdown
Set to GNUNET_YES if we are shutting down as soon as possible.
struct SubsystemEntry * next
Subsystems are kept in a DLL.
struct WatchEntry * we_tail
Watch context for changes to this value, or NULL for none.
We keep the statistics organized by subsystem for faster lookup during SET operations.
Information about one of our clients.
static void do_shutdown()
Actually perform the shutdown.
Entry in the statistics list.
struct ClientEntry * ce
For which client is this watch entry?
static struct SubsystemEntry * sub_head
Head of linked list of subsystems with active statistics.
#define GNUNET_YES
Definition: gnunet_common.h:77
struct WatchEntry * next
Watch entries are kept in a linked list.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ inject_message()

static int inject_message ( void *  cls,
const struct GNUNET_MessageHeader message 
)
static

We've read a struct GNUNET_STATISTICS_SetMessage * from disk.

Check that it is well-formed, and if so pass it to the handler for set messages.

Parameters
clsNULL
messagethe message found on disk
Returns
GNUNET_OK on success, GNUNET_NO to stop further processing (no error) GNUNET_SYSERR to stop further processing with error

Definition at line 915 of file gnunet-service-statistics.c.

References check_set(), GNUNET_break, GNUNET_OK, GNUNET_SYSERR, handle_set(), and GNUNET_MessageHeader::size.

Referenced by load().

916 {
917  uint16_t msize = ntohs(message->size);
918  const struct GNUNET_STATISTICS_SetMessage *sm;
919 
920  sm = (const struct GNUNET_STATISTICS_SetMessage *)message;
921  if ((sizeof(struct GNUNET_STATISTICS_SetMessage) > msize) ||
922  (GNUNET_OK != check_set(NULL, sm)))
923  {
924  GNUNET_break(0);
925  return GNUNET_SYSERR;
926  }
927  handle_set(NULL, sm);
928  return GNUNET_OK;
929 }
Message to set a statistic.
Definition: statistics.h:90
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
static int check_set(void *cls, const struct GNUNET_STATISTICS_SetMessage *msg)
Check format of SET-message.
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
static void handle_set(void *cls, const struct GNUNET_STATISTICS_SetMessage *msg)
Handle SET-message.
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◆ load()

static void load ( )
static

Load persistent values from disk.

Disk format is exactly the same format that we also use for setting the values over the network.

Definition at line 937 of file gnunet-service-statistics.c.

References _, buf, fn, GNUNET_BIO_read(), GNUNET_BIO_read_close(), GNUNET_BIO_read_open(), GNUNET_break, GNUNET_CONFIGURATION_get_value_filename(), GNUNET_DISK_file_size(), GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_log, GNUNET_log_config_missing(), GNUNET_log_strerror_file, GNUNET_malloc, GNUNET_MST_create(), GNUNET_MST_destroy(), GNUNET_MST_from_buffer(), GNUNET_NO, GNUNET_OK, GNUNET_YES, and inject_message().

Referenced by run().

938 {
939  char *fn;
940  struct GNUNET_BIO_ReadHandle *rh;
941  uint64_t fsize;
942  char *buf;
943  struct GNUNET_MessageStreamTokenizer *mst;
944 
946  "STATISTICS",
947  "DATABASE",
948  &fn))
949  {
951  "STATISTICS",
952  "DATABASE");
953  return;
954  }
955  if ((GNUNET_OK !=
956  GNUNET_DISK_file_size(fn, &fsize, GNUNET_NO, GNUNET_YES)) ||
957  (0 == fsize))
958  {
959  GNUNET_free(fn);
960  return;
961  }
962  buf = GNUNET_malloc(fsize);
963  rh = GNUNET_BIO_read_open(fn);
964  if (!rh)
965  {
966  GNUNET_free(buf);
967  GNUNET_free(fn);
968  return;
969  }
970  if (GNUNET_OK != GNUNET_BIO_read(rh, fn, buf, fsize))
971  {
974  GNUNET_free(buf);
975  GNUNET_free(fn);
976  return;
977  }
979  _("Loading %llu bytes of statistics from `%s'\n"),
980  (unsigned long long)fsize,
981  fn);
982  mst = GNUNET_MST_create(&inject_message, NULL);
983  GNUNET_break(
984  GNUNET_OK ==
985  GNUNET_MST_from_buffer(mst, buf, (size_t)fsize, GNUNET_YES, GNUNET_NO));
986  GNUNET_MST_destroy(mst);
987  GNUNET_free(buf);
989  GNUNET_free(fn);
990 }
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
int GNUNET_BIO_read_close(struct GNUNET_BIO_ReadHandle *h, char **emsg)
Close an open file.
Definition: bio.c:118
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define _(String)
GNU gettext support macro.
Definition: platform.h:181
struct GNUNET_BIO_ReadHandle * GNUNET_BIO_read_open(const char *fn)
Open a file for reading.
Definition: bio.c:93
int GNUNET_BIO_read(struct GNUNET_BIO_ReadHandle *h, const char *what, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: bio.c:143
static int inject_message(void *cls, const struct GNUNET_MessageHeader *message)
We&#39;ve read a struct GNUNET_STATISTICS_SetMessage * from disk.
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
void GNUNET_MST_destroy(struct GNUNET_MessageStreamTokenizer *mst)
Destroys a tokenizer.
Definition: mst.c:410
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
static char * fn
Filename of the unique file.
Handle to a message stream tokenizer.
Definition: mst.c:43
static char buf[2048]
struct GNUNET_MessageStreamTokenizer * GNUNET_MST_create(GNUNET_MessageTokenizerCallback cb, void *cb_cls)
Create a message stream tokenizer.
Definition: mst.c:84
int GNUNET_MST_from_buffer(struct GNUNET_MessageStreamTokenizer *mst, const char *buf, size_t size, int purge, int one_shot)
Add incoming data to the receive buffer and call the callback for all complete messages.
Definition: mst.c:113
int GNUNET_DISK_file_size(const char *filename, uint64_t *size, int include_symbolic_links, int single_file_mode)
Get the size of the file (or directory) of the given file (in bytes).
Definition: disk.c:254
#define GNUNET_log(kind,...)
int GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
#define GNUNET_YES
Definition: gnunet_common.h:77
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
#define GNUNET_malloc(size)
Wrapper around malloc.
Handle for buffered reading.
Definition: bio.c:53
#define GNUNET_free(ptr)
Wrapper around free.
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◆ run()

static void run ( void *  cls,
const struct GNUNET_CONFIGURATION_Handle c,
struct GNUNET_SERVICE_Handle service 
)
static

Process statistics requests.

Parameters
clsclosure
cconfiguration to use
servicethe initialized service

Definition at line 1001 of file gnunet-service-statistics.c.

References __attribute__, client_connect_cb(), client_disconnect_cb(), disconnect(), GNUNET_MESSAGE_TYPE_STATISTICS_DISCONNECT, GNUNET_MESSAGE_TYPE_STATISTICS_GET, GNUNET_MESSAGE_TYPE_STATISTICS_SET, GNUNET_MESSAGE_TYPE_STATISTICS_WATCH, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_hd_var_size, GNUNET_notification_context_create(), GNUNET_SCHEDULER_add_shutdown(), GNUNET_SERVICE_MAIN(), GNUNET_SERVICE_OPTION_SOFT_SHUTDOWN, load(), shutdown_task(), and watch.

1004 {
1005  cfg = c;
1007  load();
1009 }
static void load()
Load persistent values from disk.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received, or when GNUNET_SCHEDULER_shutdown() is being invoked.
Definition: scheduler.c:1284
static void shutdown_task(void *cls)
Task run during shutdown.
static struct GNUNET_NotificationContext * nc
Our notification context.
struct GNUNET_NotificationContext * GNUNET_notification_context_create(unsigned int queue_length)
Create a new notification context.
Definition: nc.c:119
static const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
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◆ GNUNET_SERVICE_MAIN()

Define "main" method using service macro.

Referenced by run().

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Variable Documentation

◆ cfg

const struct GNUNET_CONFIGURATION_Handle* cfg
static

Our configuration.

Definition at line 202 of file gnunet-service-statistics.c.

◆ sub_head

struct SubsystemEntry* sub_head
static

Head of linked list of subsystems with active statistics.

Definition at line 207 of file gnunet-service-statistics.c.

◆ sub_tail

struct SubsystemEntry* sub_tail
static

Tail of linked list of subsystems with active statistics.

Definition at line 212 of file gnunet-service-statistics.c.

◆ client_count

unsigned int client_count
static

Number of connected clients.

Definition at line 217 of file gnunet-service-statistics.c.

Referenced by client_connect_cb(), client_disconnect_cb(), do_shutdown(), and shutdown_task().

◆ nc

struct GNUNET_NotificationContext* nc
static

Our notification context.

Definition at line 222 of file gnunet-service-statistics.c.

◆ uidgen

uint32_t uidgen
static

Counter used to generate unique values.

Definition at line 227 of file gnunet-service-statistics.c.

Referenced by handle_set(), and handle_watch().

◆ in_shutdown

int in_shutdown
static

Set to GNUNET_YES if we are shutting down as soon as possible.

Definition at line 232 of file gnunet-service-statistics.c.

Referenced by client_disconnect_cb(), and shutdown_task().