GNUnet  0.17.6
Data Structures | Macros | Functions | Variables
gnunet-service-core.c File Reference

high-level P2P messaging More...

#include "platform.h"
#include <gcrypt.h>
#include "gnunet_util_lib.h"
#include "gnunet-service-core.h"
#include "gnunet-service-core_kx.h"
#include "gnunet-service-core_sessions.h"
#include "gnunet-service-core_typemap.h"
Include dependency graph for gnunet-service-core.c:

Go to the source code of this file.

Data Structures

struct  GSC_Client
 Data structure for each client connected to the CORE service. More...
 
struct  TokenizerContext
 Closure for the #client_tokenizer_callback(). More...
 

Macros

#define SOFT_MAX_QUEUE   128
 How many messages do we queue up at most for any client? This can cause messages to be dropped if clients do not process them fast enough! Note that this is a soft limit; we try to keep a few larger messages above the limit. More...
 
#define HARD_MAX_QUEUE   256
 How many messages do we queue up at most for any client? This can cause messages to be dropped if clients do not process them fast enough! Note that this is the hard limit. More...
 

Functions

static int type_match (uint16_t type, struct GSC_Client *c)
 Test if the client is interested in messages of the given type. More...
 
static int check_client_init (void *cls, const struct InitMessage *im)
 Check GNUNET_MESSAGE_TYPE_CORE_INIT request. More...
 
static void handle_client_init (void *cls, const struct InitMessage *im)
 Handle GNUNET_MESSAGE_TYPE_CORE_INIT request. More...
 
void GSC_CLIENTS_reject_request (struct GSC_ClientActiveRequest *car, int drop_client)
 We will never be ready to transmit the given message in (disconnect or invalid request). More...
 
void GSC_CLIENTS_solicit_request (struct GSC_ClientActiveRequest *car)
 Tell a client that we are ready to receive the message. More...
 
static void handle_client_send_request (void *cls, const struct SendMessageRequest *req)
 Handle GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST message. More...
 
static int tokenized_cb (void *cls, const struct GNUNET_MessageHeader *message)
 Functions with this signature are called whenever a complete message is received by the tokenizer. More...
 
static int check_client_send (void *cls, const struct SendMessage *sm)
 Check GNUNET_MESSAGE_TYPE_CORE_SEND request. More...
 
static void handle_client_send (void *cls, const struct SendMessage *sm)
 Handle GNUNET_MESSAGE_TYPE_CORE_SEND request. More...
 
static int destroy_active_client_request (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
 Free client request records. More...
 
static void * client_connect_cb (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 A client connected, set up. More...
 
static void client_disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_ctx)
 A client disconnected, clean up. More...
 
void GSC_CLIENTS_notify_client_about_neighbour (struct GSC_Client *client, const struct GNUNET_PeerIdentity *neighbour, const struct GSC_TypeMap *tmap_old, const struct GSC_TypeMap *tmap_new)
 Notify a particular client about a change to existing connection to one of our neighbours (check if the client is interested). More...
 
void GSC_CLIENTS_notify_clients_about_neighbour (const struct GNUNET_PeerIdentity *neighbour, const struct GSC_TypeMap *tmap_old, const struct GSC_TypeMap *tmap_new)
 Notify all clients about a change to existing session. More...
 
void GSC_CLIENTS_deliver_message (const struct GNUNET_PeerIdentity *sender, const struct GNUNET_MessageHeader *msg, uint16_t msize, uint32_t options)
 Deliver P2P message to interested clients. More...
 
static void shutdown_task (void *cls)
 Last task run during shutdown. More...
 
static void handle_client_monitor_peers (void *cls, const struct GNUNET_MessageHeader *message)
 Handle GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS request. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
 Initiate core service. More...
 
 GNUNET_SERVICE_MAIN ("core", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_var_size(client_init, GNUNET_MESSAGE_TYPE_CORE_INIT, struct InitMessage, NULL), GNUNET_MQ_hd_fixed_size(client_monitor_peers, GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_hd_fixed_size(client_send_request, GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST, struct SendMessageRequest, NULL), GNUNET_MQ_hd_var_size(client_send, GNUNET_MESSAGE_TYPE_CORE_SEND, struct SendMessage, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

struct GNUNET_PeerIdentity GSC_my_identity
 Our identity. More...
 
const struct GNUNET_CONFIGURATION_HandleGSC_cfg
 Our configuration. More...
 
struct GNUNET_STATISTICS_HandleGSC_stats
 For creating statistics. More...
 
static uint32_t all_client_options
 Big "or" of all client options. More...
 
static struct GSC_Clientclient_head
 Head of linked list of our clients. More...
 
static struct GSC_Clientclient_tail
 Tail of linked list of our clients. More...
 

Detailed Description

high-level P2P messaging

Author
Christian Grothoff

Definition in file gnunet-service-core.c.

Macro Definition Documentation

◆ SOFT_MAX_QUEUE

#define SOFT_MAX_QUEUE   128

How many messages do we queue up at most for any client? This can cause messages to be dropped if clients do not process them fast enough! Note that this is a soft limit; we try to keep a few larger messages above the limit.

Definition at line 40 of file gnunet-service-core.c.

◆ HARD_MAX_QUEUE

#define HARD_MAX_QUEUE   256

How many messages do we queue up at most for any client? This can cause messages to be dropped if clients do not process them fast enough! Note that this is the hard limit.

Definition at line 47 of file gnunet-service-core.c.

Function Documentation

◆ type_match()

static int type_match ( uint16_t  type,
struct GSC_Client c 
)
static

Test if the client is interested in messages of the given type.

Parameters
typemessage type
cclient to test
Returns
GNUNET_YES if c is interested, GNUNET_NO if not.

Definition at line 152 of file gnunet-service-core.c.

153 {
154  if ((0 == c->tcnt) && (0 != c->options))
155  return GNUNET_YES; /* peer without handlers and inbound/outbond
156  callbacks matches ALL */
157  if (NULL == c->types)
158  return GNUNET_NO;
159  for (unsigned int i = 0; i < c->tcnt; i++)
160  if (type == c->types[i])
161  return GNUNET_YES;
162  return GNUNET_NO;
163 }
@ GNUNET_YES
@ GNUNET_NO
Definition: gnunet_common.h:98
uint32_t options
Options for messages this client cares about, see GNUNET_CORE_OPTION_ values.
unsigned int tcnt
Number of types of incoming messages this client specifically cares about.
uint16_t * types
Array of the types of messages this peer cares about (with tcnt entries).
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model

References GNUNET_NO, GNUNET_YES, GSC_Client::options, GSC_Client::tcnt, type, and GSC_Client::types.

Referenced by GSC_CLIENTS_deliver_message().

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◆ check_client_init()

static int check_client_init ( void *  cls,
const struct InitMessage im 
)
static

Check GNUNET_MESSAGE_TYPE_CORE_INIT request.

Parameters
clsclient that sent GNUNET_MESSAGE_TYPE_CORE_INIT
imthe struct InitMessage
Returns
GNUNET_OK if im is well-formed

Definition at line 174 of file gnunet-service-core.c.

175 {
176  return GNUNET_OK;
177 }
@ GNUNET_OK
Definition: gnunet_common.h:99

References GNUNET_OK.

◆ handle_client_init()

static void handle_client_init ( void *  cls,
const struct InitMessage im 
)
static

Handle GNUNET_MESSAGE_TYPE_CORE_INIT request.

Parameters
clsclient that sent GNUNET_MESSAGE_TYPE_CORE_INIT
imthe struct InitMessage

Definition at line 187 of file gnunet-service-core.c.

188 {
189  struct GSC_Client *c = cls;
190  struct GNUNET_MQ_Envelope *env;
191  struct InitReplyMessage *irm;
192  uint16_t msize;
193  const uint16_t *types;
194 
195  /* check that we don't have an entry already */
196  msize = ntohs (im->header.size) - sizeof(struct InitMessage);
197  types = (const uint16_t *) &im[1];
198  c->tcnt = msize / sizeof(uint16_t);
199  c->options = ntohl (im->options);
200  c->got_init = GNUNET_YES;
202  c->types = GNUNET_malloc (msize);
205  c->connectmap,
207  NULL,
209  for (unsigned int i = 0; i < c->tcnt; i++)
210  c->types[i] = ntohs (types[i]);
211  GSC_TYPEMAP_add (c->types, c->tcnt);
212  GNUNET_log (
214  "Client connecting to core service is interested in %u message types\n",
215  (unsigned int) c->tcnt);
216  /* send init reply message */
218  irm->reserved = htonl (0);
220  GNUNET_MQ_send (c->mq, env);
223 }
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static uint32_t all_client_options
Big "or" of all client options.
struct GNUNET_PeerIdentity GSC_my_identity
Our identity.
void GSC_SESSIONS_notify_client_about_sessions(struct GSC_Client *client)
We have a new client, notify it about all current sessions.
void GSC_TYPEMAP_add(const uint16_t *types, unsigned int tlen)
Add a set of types to our type map.
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY
There must only be one value per key; storing a value should fail if a value under the same key alrea...
#define GNUNET_log(kind,...)
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
@ GNUNET_ERROR_TYPE_DEBUG
#define GNUNET_malloc(size)
Wrapper around malloc.
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:302
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:71
#define GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY
Response from core to core client to INIT message.
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2248
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
Data structure for each client connected to the CORE service.
struct GNUNET_SERVICE_Client * client
Handle for the client with the server API.
struct GNUNET_MQ_Handle * mq
Message queue to talk to client.
struct GNUNET_CONTAINER_MultiPeerMap * connectmap
Map containing all peers that this client knows we're connected to.
int got_init
Have we gotten the GNUNET_MESSAGE_TYPE_CORE_INIT message from this client already?
Message transmitted core clients to gnunet-service-core to start the interaction.
Definition: core.h:84
struct GNUNET_MessageHeader header
Header with type GNUNET_MESSAGE_TYPE_CORE_INIT.
Definition: core.h:88
uint32_t options
Options, see GNUNET_CORE_OPTION_ values.
Definition: core.h:93
Message transmitted by the gnunet-service-core process to its clients in response to an INIT message.
Definition: core.h:102
struct GNUNET_PeerIdentity my_identity
Public key of the local peer.
Definition: core.h:116
uint32_t reserved
Always zero.
Definition: core.h:111

References all_client_options, GSC_Client::client, GSC_Client::connectmap, env, GNUNET_assert, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_put(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_malloc, GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_SERVICE_client_continue(), GNUNET_YES, GSC_Client::got_init, GSC_my_identity, GSC_SESSIONS_notify_client_about_sessions(), GSC_TYPEMAP_add(), InitMessage::header, GSC_Client::mq, InitReplyMessage::my_identity, InitMessage::options, GSC_Client::options, InitReplyMessage::reserved, GNUNET_MessageHeader::size, GSC_Client::tcnt, and GSC_Client::types.

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◆ GSC_CLIENTS_reject_request()

void GSC_CLIENTS_reject_request ( struct GSC_ClientActiveRequest car,
int  drop_client 
)

We will never be ready to transmit the given message in (disconnect or invalid request).

Frees resources associated with car. We don't explicitly tell the client, it'll learn with the disconnect (or violated the protocol).

Parameters
carrequest that now permanently failed; the responsibility for the handle is now returned to CLIENTS (SESSIONS is done with it).
drop_clientGNUNET_YES if the client violated the protocol and we should thus drop the connection

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

241 {
242  GNUNET_assert (
243  GNUNET_YES ==
245  &car->target,
246  car));
247  if (GNUNET_YES == drop_client)
249  GNUNET_free (car);
250 }
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
#define GNUNET_free(ptr)
Wrapper around free.
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2329
struct GNUNET_PeerIdentity target
Which peer is the message going to be for?
struct GSC_Client * client_handle
Handle to the client.
struct GNUNET_CONTAINER_MultiPeerMap * requests
Map of peer identities to active transmission requests of this client to the peer (of type struct GSC...

References GSC_Client::client, GSC_ClientActiveRequest::client_handle, GNUNET_assert, GNUNET_CONTAINER_multipeermap_remove(), GNUNET_free, GNUNET_SERVICE_client_drop(), GNUNET_YES, GSC_Client::requests, and GSC_ClientActiveRequest::target.

Referenced by GSC_CLIENTS_solicit_request(), GSC_SESSIONS_end(), and GSC_SESSIONS_queue_request().

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◆ GSC_CLIENTS_solicit_request()

void GSC_CLIENTS_solicit_request ( struct GSC_ClientActiveRequest car)

Tell a client that we are ready to receive the message.

Parameters
carrequest that is now ready; the responsibility for the handle remains shared between CLIENTS and SESSIONS after this call.

Definition at line 261 of file gnunet-service-core.c.

262 {
263  struct GSC_Client *c;
264  struct GNUNET_MQ_Envelope *env;
265  struct SendMessageReady *smr;
267  struct GNUNET_TIME_Relative left;
268 
269  c = car->client_handle;
270  if (GNUNET_YES !=
272  {
273  /* connection has gone down since, drop request */
274  GNUNET_assert (0 !=
275  GNUNET_memcmp (&car->target,
276  &GSC_my_identity));
279  return;
280  }
284  GNUNET_log (
286  "Client waited %s for permission to transmit to `%s'%s (priority %u)\n",
288  GNUNET_i2s (&car->target),
289  (0 == left.rel_value_us) ? " (past deadline)" : "",
290  car->priority);
292  smr->size = htons (car->msize);
293  smr->smr_id = car->smr_id;
294  smr->peer = car->target;
295  GNUNET_MQ_send (c->mq, env);
296 }
static struct GNUNET_TIME_Relative delay
When should dkg communication start?
void GSC_CLIENTS_reject_request(struct GSC_ClientActiveRequest *car, int drop_client)
We will never be ready to transmit the given message in (disconnect or invalid request).
void GSC_SESSIONS_dequeue_request(struct GSC_ClientActiveRequest *car)
Dequeue a request from a client from transmission to a particular peer.
#define GNUNET_CONSTANTS_LATENCY_WARN
After what amount of latency for a message do we print a warning?
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multipeermap_contains(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Check if the map contains any value under the given key (including values that are NULL).
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_WARNING
#define GNUNET_MESSAGE_TYPE_CORE_SEND_READY
Confirmation from core that message can now be sent.
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_duration(struct GNUNET_TIME_Absolute whence)
Get the duration of an operation as the difference of the current time and the given start time "henc...
Definition: time.c:435
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:570
Time for relative time used by GNUnet, in microseconds.
uint64_t rel_value_us
The actual value.
uint16_t smr_id
Unique request ID (in big endian).
struct GNUNET_TIME_Absolute deadline
By what time would the client want to see this message out?
struct GNUNET_TIME_Absolute received_time
At what time did we first see this request?
uint16_t msize
How many bytes does the client intend to send?
enum GNUNET_MQ_PriorityPreferences priority
How important is this request.
Core notifying client that it is allowed to now transmit a message to the given target (response to G...
Definition: core.h:242
uint16_t smr_id
smr_id from the request.
Definition: core.h:259
struct GNUNET_PeerIdentity peer
Identity of the intended target.
Definition: core.h:264
uint16_t size
How many bytes are allowed for transmission? Guaranteed to be at least as big as the requested size,...
Definition: core.h:254

References GSC_ClientActiveRequest::client_handle, GSC_Client::connectmap, GSC_ClientActiveRequest::deadline, delay, env, GNUNET_assert, GNUNET_CONSTANTS_LATENCY_WARN, GNUNET_CONTAINER_multipeermap_contains(), GNUNET_ERROR_TYPE_WARNING, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_MESSAGE_TYPE_CORE_SEND_READY, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_absolute_get_duration(), GNUNET_YES, GSC_CLIENTS_reject_request(), GSC_my_identity, GSC_SESSIONS_dequeue_request(), GSC_Client::mq, GSC_ClientActiveRequest::msize, SendMessageReady::peer, GSC_ClientActiveRequest::priority, GSC_ClientActiveRequest::received_time, GNUNET_TIME_Relative::rel_value_us, SendMessageReady::size, SendMessageReady::smr_id, GSC_ClientActiveRequest::smr_id, and GSC_ClientActiveRequest::target.

Referenced by handle_client_send_request(), and solicit_messages().

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◆ handle_client_send_request()

static void handle_client_send_request ( void *  cls,
const struct SendMessageRequest req 
)
static

Handle GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST message.

Parameters
clsclient that sent a GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST
reqthe struct SendMessageRequest

Definition at line 306 of file gnunet-service-core.c.

307 {
308  struct GSC_Client *c = cls;
309  struct GSC_ClientActiveRequest *car;
310  int is_loopback;
311 
312  if (NULL == c->requests)
315  "Client asked for transmission to `%s'\n",
316  GNUNET_i2s (&req->peer));
317  is_loopback = (0 == GNUNET_memcmp (&req->peer,
318  &GSC_my_identity));
319  if ((! is_loopback) &&
320  (GNUNET_YES !=
322  {
323  /* neighbour must have disconnected since request was issued,
324  * ignore (client will realize it once it processes the
325  * disconnect notification) */
327  gettext_noop (
328  "# send requests dropped (disconnected)"),
329  1,
330  GNUNET_NO);
332  return;
333  }
334 
336  if (NULL == car)
337  {
338  /* create new entry */
339  car = GNUNET_new (struct GSC_ClientActiveRequest);
342  c->requests,
343  &req->peer,
344  car,
346  car->client_handle = c;
347  }
348  else
349  {
350  /* dequeue and recycle memory from pending request, there can only
351  be at most one per client and peer */
353  gettext_noop (
354  "# dequeuing CAR (duplicate request)"),
355  1,
356  GNUNET_NO);
359  "Transmission request to `%s' was a duplicate!\n",
360  GNUNET_i2s (&req->peer));
361  }
362  car->target = req->peer;
365  car->priority = (enum GNUNET_MQ_PriorityPreferences) ntohl (req->priority);
366  car->msize = ntohs (req->size);
367  car->smr_id = req->smr_id;
368  car->was_solicited = GNUNET_NO;
370  if (is_loopback)
371  {
372  /* loopback, satisfy immediately */
374  return;
375  }
377 }
#define gettext_noop(String)
Definition: gettext.h:69
struct GNUNET_STATISTICS_Handle * GSC_stats
For creating statistics.
void GSC_CLIENTS_solicit_request(struct GSC_ClientActiveRequest *car)
Tell a client that we are ready to receive the message.
void GSC_SESSIONS_queue_request(struct GSC_ClientActiveRequest *car)
Queue a request from a client for transmission to a particular peer.
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
void * GNUNET_CONTAINER_multipeermap_get(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Given a key find a value in the map matching the key.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST
, ' bother checking if a value already exists (faster than GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE...
#define GNUNET_new(type)
Allocate a struct or union of the given type.
GNUNET_MQ_PriorityPreferences
Per envelope preferences and priorities.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:110
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:736
Record kept for each request for transmission issued by a client that is still pending.
int was_solicited
Has this request been solicited yet?
uint32_t priority
How important is this message?
Definition: core.h:206
struct GNUNET_PeerIdentity peer
Identity of the intended target.
Definition: core.h:217
uint16_t size
How large is the message?
Definition: core.h:227
uint16_t smr_id
Counter for this peer to match SMRs to replies.
Definition: core.h:232
struct GNUNET_TIME_AbsoluteNBO deadline
By what time would the sender really like to see this message transmitted?
Definition: core.h:212

References GSC_Client::client, GSC_ClientActiveRequest::client_handle, GSC_Client::connectmap, SendMessageRequest::deadline, GSC_ClientActiveRequest::deadline, gettext_noop, GNUNET_assert, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST, GNUNET_CONTAINER_multipeermap_contains(), GNUNET_CONTAINER_multipeermap_create(), GNUNET_CONTAINER_multipeermap_get(), GNUNET_CONTAINER_multipeermap_put(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), GNUNET_TIME_absolute_get(), GNUNET_TIME_absolute_ntoh(), GNUNET_YES, GSC_CLIENTS_solicit_request(), GSC_my_identity, GSC_SESSIONS_dequeue_request(), GSC_SESSIONS_queue_request(), GSC_stats, GSC_ClientActiveRequest::msize, SendMessageRequest::peer, SendMessageRequest::priority, GSC_ClientActiveRequest::priority, GSC_ClientActiveRequest::received_time, GSC_Client::requests, SendMessageRequest::size, SendMessageRequest::smr_id, GSC_ClientActiveRequest::smr_id, GSC_ClientActiveRequest::target, and GSC_ClientActiveRequest::was_solicited.

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◆ tokenized_cb()

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

Functions with this signature are called whenever a complete message is received by the tokenizer.

Used by handle_client_send() for dispatching messages from clients to either the SESSION subsystem or other CLIENT (for loopback).

Parameters
clsreservation request (struct TokenizerContext)
messagethe actual message
Returns
GNUNET_OK on success, GNUNET_NO to stop further processing (no error) GNUNET_SYSERR to stop further processing with error

Definition at line 410 of file gnunet-service-core.c.

411 {
412  struct TokenizerContext *tc = cls;
413  struct GSC_ClientActiveRequest *car = tc->car;
414  char buf[92];
415 
417  sizeof(buf),
418  gettext_noop ("# bytes of messages of type %u received"),
419  (unsigned int) ntohs (message->type));
420  GNUNET_STATISTICS_update (GSC_stats, buf, ntohs (message->size), GNUNET_NO);
421  if (0 == GNUNET_memcmp (&car->target,
422  &GSC_my_identity))
423  {
425  "Delivering message of type %u to myself\n",
426  ntohs (message->type));
428  message,
429  ntohs (message->size),
432  message,
433  sizeof(struct GNUNET_MessageHeader),
436  message,
437  ntohs (message->size),
440  message,
441  sizeof(struct GNUNET_MessageHeader),
443  }
444  else
445  {
447  "Delivering message of type %u and size %u to %s\n",
448  ntohs (message->type),
449  ntohs (message->size),
450  GNUNET_i2s (&car->target));
452  message,
453  ntohs (message->size),
456  message,
457  sizeof(struct GNUNET_MessageHeader),
459  GSC_SESSIONS_transmit (car, message, tc->priority);
460  }
461  return GNUNET_OK;
462 }
#define GNUNET_CORE_OPTION_SEND_FULL_INBOUND
Client wants all inbound messages in full.
Definition: core.h:55
#define GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND
Client just wants the 4-byte message headers of all outbound messages.
Definition: core.h:72
#define GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND
Client wants all outbound messages in full.
Definition: core.h:66
#define GNUNET_CORE_OPTION_SEND_HDR_INBOUND
Client just wants the 4-byte message headers of all inbound messages.
Definition: core.h:61
void GSC_CLIENTS_deliver_message(const struct GNUNET_PeerIdentity *sender, const struct GNUNET_MessageHeader *msg, uint16_t msize, uint32_t options)
Deliver P2P message to interested clients.
void GSC_SESSIONS_transmit(struct GSC_ClientActiveRequest *car, const struct GNUNET_MessageHeader *msg, enum GNUNET_MQ_PriorityPreferences priority)
Transmit a message to a particular peer.
static char buf[2048]
int GNUNET_snprintf(char *buf, size_t size, const char *format,...) __attribute__((format(printf
Like snprintf, just aborts if the buffer is of insufficient size.
static struct GNUNET_SCHEDULER_TaskContext tc
Task context of the current task.
Definition: scheduler.c:423
Header for all communications.
uint16_t type
The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
Closure for the #client_tokenizer_callback().

References buf, gettext_noop, GNUNET_CORE_OPTION_SEND_FULL_INBOUND, GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND, GNUNET_CORE_OPTION_SEND_HDR_INBOUND, GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND, GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_NO, GNUNET_OK, GNUNET_snprintf(), GNUNET_STATISTICS_update(), GSC_CLIENTS_deliver_message(), GSC_my_identity, GSC_SESSIONS_transmit(), GSC_stats, GNUNET_MessageHeader::size, GSC_ClientActiveRequest::target, tc, and GNUNET_MessageHeader::type.

Referenced by handle_client_send().

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◆ check_client_send()

static int check_client_send ( void *  cls,
const struct SendMessage sm 
)
static

Check GNUNET_MESSAGE_TYPE_CORE_SEND request.

Parameters
clsthe struct GSC_Client
smthe struct SendMessage
Returns
GNUNET_OK if sm is well-formed

Definition at line 473 of file gnunet-service-core.c.

474 {
475  return GNUNET_OK;
476 }

References GNUNET_OK.

◆ handle_client_send()

static void handle_client_send ( void *  cls,
const struct SendMessage sm 
)
static

Handle GNUNET_MESSAGE_TYPE_CORE_SEND request.

Parameters
clsthe struct GSC_Client
smthe struct SendMessage

Definition at line 486 of file gnunet-service-core.c.

487 {
488  struct GSC_Client *c = cls;
489  struct TokenizerContext tc;
490  uint16_t msize;
492  struct GNUNET_MessageStreamTokenizer *mst;
493 
494  msize = ntohs (sm->header.size) - sizeof(struct SendMessage);
496  if (NULL == tc.car)
497  {
498  /* Must have been that we first approved the request, then got disconnected
499  * (which triggered removal of the 'car') and now the client gives us a message
500  * just *before* the client learns about the disconnect. Theoretically, we
501  * might also now be *again* connected. So this can happen (but should be
502  * rare). If it does happen, the message is discarded. */GNUNET_STATISTICS_update (GSC_stats,
503  gettext_noop (
504  "# messages discarded (session disconnected)"),
505  1,
506  GNUNET_NO);
508  return;
509  }
510  delay = GNUNET_TIME_absolute_get_duration (tc.car->received_time);
511  tc.priority = (enum GNUNET_MQ_PriorityPreferences) ntohl (sm->priority);
514  "Client waited %s for transmission of %u bytes to `%s'\n",
516  msize,
517  GNUNET_i2s (&sm->peer));
518  else
520  "Client waited %s for transmission of %u bytes to `%s'\n",
522  msize,
523  GNUNET_i2s (&sm->peer));
524 
525  GNUNET_assert (
526  GNUNET_YES ==
528  mst = GNUNET_MST_create (&tokenized_cb, &tc);
530  (const char *) &sm[1],
531  msize,
532  GNUNET_YES,
533  GNUNET_NO);
534  GNUNET_MST_destroy (mst);
536  GNUNET_free (tc.car);
538 }
static int tokenized_cb(void *cls, const struct GNUNET_MessageHeader *message)
Functions with this signature are called whenever a complete message is received by the tokenizer.
void GNUNET_MST_destroy(struct GNUNET_MessageStreamTokenizer *mst)
Destroys a tokenizer.
Definition: mst.c:418
struct GNUNET_MessageStreamTokenizer * GNUNET_MST_create(GNUNET_MessageTokenizerCallback cb, void *cb_cls)
Create a message stream tokenizer.
Definition: mst.c:85
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:114
Handle to a message stream tokenizer.
Definition: mst.c:44
Client asking core to transmit a particular message to a particular target (response to GNUNET_MESSAG...
Definition: core.h:273
struct GNUNET_MessageHeader header
Header with type GNUNET_MESSAGE_TYPE_CORE_SEND.
Definition: core.h:277
uint32_t priority
How important is this message? Contains a enum GNUNET_MQ_PriorityPreferences in NBO.
Definition: core.h:283
struct GNUNET_PeerIdentity peer
Identity of the intended receiver.
Definition: core.h:294

References GSC_Client::client, delay, gettext_noop, GNUNET_assert, GNUNET_CONSTANTS_LATENCY_WARN, GNUNET_CONTAINER_multipeermap_get(), GNUNET_CONTAINER_multipeermap_remove(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_i2s(), GNUNET_log, GNUNET_MST_create(), GNUNET_MST_destroy(), GNUNET_MST_from_buffer(), GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_STATISTICS_update(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_absolute_get_duration(), GNUNET_YES, GSC_SESSIONS_dequeue_request(), GSC_stats, SendMessage::header, SendMessage::peer, SendMessage::priority, GNUNET_TIME_Relative::rel_value_us, GSC_Client::requests, GNUNET_MessageHeader::size, tc, and tokenized_cb().

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◆ destroy_active_client_request()

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

Free client request records.

Parameters
clsNULL
keyidentity of peer for which this is an active request
valuethe struct GSC_ClientActiveRequest to free
Returns
GNUNET_YES (continue iteration)

Definition at line 550 of file gnunet-service-core.c.

553 {
554  struct GSC_ClientActiveRequest *car = value;
555 
556  GNUNET_assert (
557  GNUNET_YES ==
559  &car->target,
560  car));
562  GNUNET_free (car);
563  return GNUNET_YES;
564 }
static char * value
Value of the record to add/remove.

References GSC_ClientActiveRequest::client_handle, GNUNET_assert, GNUNET_CONTAINER_multipeermap_remove(), GNUNET_free, GNUNET_YES, GSC_SESSIONS_dequeue_request(), GSC_Client::requests, GSC_ClientActiveRequest::target, and value.

Referenced by client_disconnect_cb().

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◆ client_connect_cb()

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

A client connected, set up.

Parameters
clsclosure
clientidentification of the client
mqmessage queue to talk to client
Returns
our client handle

Definition at line 576 of file gnunet-service-core.c.

579 {
580  struct GSC_Client *c;
581 
582  c = GNUNET_new (struct GSC_Client);
583  c->client = client;
584  c->mq = mq;
587  return c;
588 }
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
static struct GSC_Client * client_head
Head of linked list of our clients.
static struct GSC_Client * client_tail
Tail of linked list of our clients.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.

References GSC_Client::client, client_head, client_tail, GSC_Client::connectmap, GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_multipeermap_create(), GNUNET_new, GNUNET_NO, mq, and GSC_Client::mq.

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◆ client_disconnect_cb()

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

A client disconnected, clean up.

Parameters
clsclosure
clientidentification of the client
app_ctxour struct GST_Client for client

Definition at line 599 of file gnunet-service-core.c.

602 {
603  struct GSC_Client *c = app_ctx;
604 
606  "Client %p has disconnected from core service.\n",
607  client);
609  if (NULL != c->requests)
610  {
613  NULL);
615  }
617  c->connectmap = NULL;
618  if (NULL != c->types)
619  {
620  GSC_TYPEMAP_remove (c->types, c->tcnt);
621  GNUNET_free (c->types);
622  }
623  GNUNET_free (c);
624 
625  /* recalculate 'all_client_options' */
626  all_client_options = 0;
627  for (c = client_head; NULL != c; c = c->next)
629 }
static int destroy_active_client_request(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Free client request records.
void GSC_TYPEMAP_remove(const uint16_t *types, unsigned int tlen)
Remove a set of message types from our type map.
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
struct GSC_Client * next
Clients are kept in a linked list.

References all_client_options, GSC_Client::client, client_head, client_tail, GSC_Client::connectmap, destroy_active_client_request(), GNUNET_CONTAINER_DLL_remove, GNUNET_CONTAINER_multipeermap_destroy(), GNUNET_CONTAINER_multipeermap_iterate(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GSC_TYPEMAP_remove(), GSC_Client::next, GSC_Client::options, GSC_Client::requests, GSC_Client::tcnt, and GSC_Client::types.

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◆ GSC_CLIENTS_notify_client_about_neighbour()

void GSC_CLIENTS_notify_client_about_neighbour ( struct GSC_Client client,
const struct GNUNET_PeerIdentity neighbour,
const struct GSC_TypeMap tmap_old,
const struct GSC_TypeMap tmap_new 
)

Notify a particular client about a change to existing connection to one of our neighbours (check if the client is interested).

Called from GSC_SESSIONS_notify_client_about_sessions().

Parameters
clientclient to notify
neighbouridentity of the neighbour that changed status
tmap_oldprevious type map for the neighbour, NULL for connect
tmap_newupdated type map for the neighbour, NULL for disconnect

Definition at line 643 of file gnunet-service-core.c.

648 {
649  struct GNUNET_MQ_Envelope *env;
650  int old_match;
651  int new_match;
652 
653  if (GNUNET_YES != client->got_init)
654  return;
655  old_match = GSC_TYPEMAP_test_match (tmap_old, client->types, client->tcnt);
656  new_match = GSC_TYPEMAP_test_match (tmap_new, client->types, client->tcnt);
658  "Notifying client about neighbour %s (%d/%d)\n",
659  GNUNET_i2s (neighbour),
660  old_match,
661  new_match);
662  if (old_match == new_match)
663  {
664  GNUNET_assert (
665  old_match ==
667  return; /* no change */
668  }
669  if (GNUNET_NO == old_match)
670  {
671  struct ConnectNotifyMessage *cnm;
672 
673  /* send connect */
674  GNUNET_assert (
675  GNUNET_NO ==
679  client->connectmap,
680  neighbour,
681  NULL,
684  cnm->reserved = htonl (0);
686  "Sending NOTIFY_CONNECT message about peer %s to client.\n",
687  GNUNET_i2s (neighbour));
688  cnm->peer = *neighbour;
689  GNUNET_MQ_send (client->mq, env);
690  }
691  else
692  {
693  struct DisconnectNotifyMessage *dcm;
694 
695  /* send disconnect */
696  GNUNET_assert (
697  GNUNET_YES ==
701  neighbour,
702  NULL));
704  dcm->reserved = htonl (0);
706  "Sending NOTIFY_DISCONNECT message about peer %s to client.\n",
707  GNUNET_i2s (neighbour));
708  dcm->peer = *neighbour;
709  GNUNET_MQ_send (client->mq, env);
710  }
711 }
int GSC_TYPEMAP_test_match(const struct GSC_TypeMap *tmap, const uint16_t *types, unsigned int tcnt)
Test if any of the types from the types array is in the given type map.
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT
Notify clients about new peer-to-peer connections (triggered after key exchange).
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT
Notify clients about peer disconnecting.
Message sent by the service to clients to notify them about a peer connecting.
Definition: core.h:125
struct GNUNET_PeerIdentity peer
Identity of the connecting peer.
Definition: core.h:139
uint32_t reserved
Always zero.
Definition: core.h:134
Message sent by the service to clients to notify them about a peer disconnecting.
Definition: core.h:148
uint32_t reserved
Always zero.
Definition: core.h:157
struct GNUNET_PeerIdentity peer
Identity of the connecting peer.
Definition: core.h:162

References GSC_Client::connectmap, env, GNUNET_assert, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_contains(), GNUNET_CONTAINER_multipeermap_put(), GNUNET_CONTAINER_multipeermap_remove(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT, GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_YES, GSC_Client::got_init, GSC_TYPEMAP_test_match(), GSC_Client::mq, ConnectNotifyMessage::peer, DisconnectNotifyMessage::peer, ConnectNotifyMessage::reserved, DisconnectNotifyMessage::reserved, GSC_Client::tcnt, and GSC_Client::types.

Referenced by GSC_CLIENTS_notify_clients_about_neighbour(), and notify_client_about_session().

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◆ GSC_CLIENTS_notify_clients_about_neighbour()

void GSC_CLIENTS_notify_clients_about_neighbour ( const struct GNUNET_PeerIdentity neighbour,
const struct GSC_TypeMap tmap_old,
const struct GSC_TypeMap tmap_new 
)

Notify all clients about a change to existing session.

Called from SESSIONS whenever there is a change in sessions or types processed by the respective peer.

Parameters
neighbouridentity of the neighbour that changed status
tmap_oldprevious type map for the neighbour, NULL for connect
tmap_newupdated type map for the neighbour, NULL for disconnect

Definition at line 724 of file gnunet-service-core.c.

728 {
729  struct GSC_Client *c;
730 
731  for (c = client_head; NULL != c; c = c->next)
733  neighbour,
734  tmap_old,
735  tmap_new);
736 }
void GSC_CLIENTS_notify_client_about_neighbour(struct GSC_Client *client, const struct GNUNET_PeerIdentity *neighbour, const struct GSC_TypeMap *tmap_old, const struct GSC_TypeMap *tmap_new)
Notify a particular client about a change to existing connection to one of our neighbours (check if t...

References client_head, GSC_CLIENTS_notify_client_about_neighbour(), and GSC_Client::next.

Referenced by GSC_SESSIONS_add_to_typemap(), GSC_SESSIONS_create(), GSC_SESSIONS_end(), and GSC_SESSIONS_set_typemap().

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◆ GSC_CLIENTS_deliver_message()

void GSC_CLIENTS_deliver_message ( const struct GNUNET_PeerIdentity sender,
const struct GNUNET_MessageHeader msg,
uint16_t  msize,
uint32_t  options 
)

Deliver P2P message to interested clients.

Caller must have checked that the sending peer actually lists the given message type as one of its types.

Parameters
senderpeer who sent us the message
msgthe message
msizenumber of bytes to transmit
optionsoptions for checking which clients should receive the message

Definition at line 751 of file gnunet-service-core.c.

755 {
756  size_t size = msize + sizeof(struct NotifyTrafficMessage);
757 
759  {
760  GNUNET_break (0);
761  return;
762  }
763  if (! ((0 != (all_client_options & options)) ||
765  return; /* no client cares about this message notification */
767  "Core service passes message from `%s' of type %u to client.\n",
768  GNUNET_i2s (sender),
769  (unsigned int) ntohs (msg->type));
770  GSC_SESSIONS_add_to_typemap (sender, ntohs (msg->type));
771 
772  for (struct GSC_Client *c = client_head; NULL != c; c = c->next)
773  {
774  struct GNUNET_MQ_Envelope *env;
775  struct NotifyTrafficMessage *ntm;
776  uint16_t mtype;
777  unsigned int qlen;
778  int tm;
779 
780  tm = type_match (ntohs (msg->type), c);
781  if (! ((0 != (c->options & options)) ||
783  (GNUNET_YES == tm))))
784  continue; /* neither options nor type match permit the message */
786  ((0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
787  (GNUNET_YES == tm)))
788  continue;
790  (0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND)))
791  continue;
792 
793  /* Drop messages if:
794  1) We are above the hard limit, or
795  2) We are above the soft limit, and a coin toss limited
796  to the message size (giving larger messages a
797  proportionally higher chance of being queued) falls
798  below the threshold. The threshold is based on where
799  we are between the soft and the hard limit, scaled
800  to match the range of message sizes we usually encounter
801  (i.e. up to 32k); so a 64k message has a 50% chance of
802  being kept if we are just barely below the hard max,
803  and a 99% chance of being kept if we are at the soft max.
804  The reason is to make it more likely to drop control traffic
805  (ACK, queries) which may be cumulative or highly redundant,
806  and cheap to drop than data traffic. */qlen = GNUNET_MQ_get_length (c->mq);
807  if ((qlen >= HARD_MAX_QUEUE) ||
808  ((qlen > SOFT_MAX_QUEUE) &&
810  ntohs (msg->size))) <
811  (qlen - SOFT_MAX_QUEUE) * 0x8000
813  {
814  char buf[1024];
815 
816  GNUNET_log (
818  "Dropping decrypted message of type %u as client is too busy (queue full)\n",
819  (unsigned int) ntohs (msg->type));
821  sizeof(buf),
822  gettext_noop (
823  "# messages of type %u discarded (client busy)"),
824  (unsigned int) ntohs (msg->type));
826  continue;
827  }
828 
829  GNUNET_log (
831  "Sending %u message with %u bytes to client interested in messages of type %u.\n",
832  options,
833  ntohs (msg->size),
834  (unsigned int) ntohs (msg->type));
835 
839  else
841  env = GNUNET_MQ_msg_extra (ntm, msize, mtype);
842  ntm->peer = *sender;
843  GNUNET_memcpy (&ntm[1], msg, msize);
844 
845  GNUNET_assert (
846  (0 == (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
847  (GNUNET_YES != tm) ||
848  (GNUNET_YES ==
849  GNUNET_CONTAINER_multipeermap_contains (c->connectmap, sender)));
850  GNUNET_MQ_send (c->mq, env);
851  }
852 }
struct GNUNET_GETOPT_CommandLineOption options[]
Definition: 002.c:5
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
static int type_match(uint16_t type, struct GSC_Client *c)
Test if the client is interested in messages of the given type.
#define SOFT_MAX_QUEUE
How many messages do we queue up at most for any client? This can cause messages to be dropped if cli...
#define HARD_MAX_QUEUE
How many messages do we queue up at most for any client? This can cause messages to be dropped if cli...
void GSC_SESSIONS_add_to_typemap(const struct GNUNET_PeerIdentity *peer, uint16_t type)
The given peer send a message of the specified type.
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message,...
uint32_t GNUNET_CRYPTO_random_u32(enum GNUNET_CRYPTO_Quality mode, uint32_t i)
Produce a random value.
@ GNUNET_CRYPTO_QUALITY_WEAK
No good quality of the operation is needed (i.e., random numbers can be pseudo-random).
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
@ GNUNET_ERROR_TYPE_BULK
@ GNUNET_ERROR_TYPE_INFO
unsigned int GNUNET_MQ_get_length(struct GNUNET_MQ_Handle *mq)
Obtain the current length of the message queue.
Definition: mq.c:291
#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:56
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND
Notify clients about outgoing P2P transmissions.
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND
Notify clients about incoming P2P messages.
static unsigned int size
Size of the "table".
Definition: peer.c:67
Message sent by the service to clients to notify them about messages being received or transmitted.
Definition: core.h:176
struct GNUNET_PeerIdentity peer
Identity of the receiver or sender.
Definition: core.h:186

References all_client_options, buf, client_head, env, gettext_noop, GNUNET_assert, GNUNET_break, GNUNET_CONTAINER_multipeermap_contains(), GNUNET_CORE_OPTION_SEND_FULL_INBOUND, GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND, GNUNET_CORE_OPTION_SEND_HDR_INBOUND, GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND, GNUNET_CRYPTO_QUALITY_WEAK, GNUNET_CRYPTO_random_u32(), GNUNET_ERROR_TYPE_BULK, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_INFO, GNUNET_i2s(), GNUNET_log, GNUNET_MAX_MESSAGE_SIZE, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND, GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND, GNUNET_MQ_get_length(), GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_NO, GNUNET_snprintf(), GNUNET_STATISTICS_update(), GNUNET_YES, GSC_SESSIONS_add_to_typemap(), GSC_stats, HARD_MAX_QUEUE, msg, GSC_Client::next, options, NotifyTrafficMessage::peer, GNUNET_MessageHeader::size, size, SOFT_MAX_QUEUE, GNUNET_MessageHeader::type, and type_match().

Referenced by deliver_message(), and tokenized_cb().

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◆ shutdown_task()

static void shutdown_task ( void *  cls)
static

Last task run during shutdown.

Disconnects us from the transport.

Parameters
clsNULL, unused

Definition at line 862 of file gnunet-service-core.c.

863 {
864  struct GSC_Client *c;
865 
866  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core service shutting down.\n");
867  while (NULL != (c = client_head))
870  GSC_KX_done ();
871  GSC_TYPEMAP_done ();
872  if (NULL != GSC_stats)
873  {
875  GSC_stats = NULL;
876  }
877  GSC_cfg = NULL;
878 }
const struct GNUNET_CONFIGURATION_Handle * GSC_cfg
Our configuration.
void GSC_KX_done()
Shutdown KX subsystem.
void GSC_SESSIONS_done()
Shutdown sessions subsystem.
void GSC_TYPEMAP_done()
Shutdown typemap subsystem.
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).

References GSC_Client::client, client_head, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_SERVICE_client_drop(), GNUNET_STATISTICS_destroy(), GSC_cfg, GSC_KX_done(), GSC_SESSIONS_done(), GSC_stats, and GSC_TYPEMAP_done().

Referenced by run().

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◆ handle_client_monitor_peers()

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

Handle GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS request.

For this request type, the client does not have to have transmitted an INIT request. All current peers are returned, regardless of which message types they accept.

Parameters
clsclient sending the iteration request
messageiteration request message

Definition at line 891 of file gnunet-service-core.c.

893 {
894  struct GSC_Client *c = cls;
895 
898 }
void GSC_KX_handle_client_monitor_peers(struct GNUNET_MQ_Handle *mq)
Handle GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS request.

References GSC_Client::client, GNUNET_SERVICE_client_continue(), GSC_KX_handle_client_monitor_peers(), and GSC_Client::mq.

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◆ run()

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

Initiate core service.

Parameters
clsclosure
cconfiguration to use
servicethe initialized service

Definition at line 909 of file gnunet-service-core.c.

912 {
914  char *keyfile;
915 
916  GSC_cfg = c;
917  if (GNUNET_OK !=
919  "PEER",
920  "PRIVATE_KEY",
921  &keyfile))
922  {
923  GNUNET_log (
925  _ ("Core service is lacking HOSTKEY configuration setting. Exiting.\n"));
927  return;
928  }
932  GSC_TYPEMAP_init ();
933  if (GNUNET_SYSERR ==
935  GNUNET_YES,
936  &pk))
937  {
939  "Failed to setup peer's private key\n");
941  GNUNET_free (keyfile);
942  return;
943  }
944  GNUNET_free (keyfile);
945  if (GNUNET_OK != GSC_KX_init (&pk))
946  {
948  return;
949  }
953  _ ("Core service of `%s' ready.\n"),
955 }
struct GNUNET_IDENTITY_PrivateKey pk
Private key from command line option, or NULL.
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
static void shutdown_task(void *cls)
Last task run during shutdown.
int GSC_KX_init(struct GNUNET_CRYPTO_EddsaPrivateKey *pk)
Initialize KX subsystem.
void GSC_SESSIONS_init()
Initialize sessions subsystem.
void GSC_TYPEMAP_init()
Initialize typemap subsystem.
enum GNUNET_GenericReturnValue 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.
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_eddsa_key_from_file(const char *filename, int do_create, struct GNUNET_CRYPTO_EddsaPrivateKey *pkey)
Create a new private key by reading it from a file.
@ GNUNET_SYSERR
Definition: gnunet_common.h:97
@ GNUNET_ERROR_TYPE_ERROR
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:533
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,...
Definition: scheduler.c:1316
void GNUNET_SERVICE_suspend(struct GNUNET_SERVICE_Handle *sh)
Suspend accepting connections from the listen socket temporarily.
Definition: service.c:2187
void GNUNET_SERVICE_resume(struct GNUNET_SERVICE_Handle *sh)
Resume accepting connections from the listen socket.
Definition: service.c:2199
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
Private ECC key encoded for transmission.

References _, GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CRYPTO_eddsa_key_from_file(), GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_free, GNUNET_i2s(), GNUNET_log, GNUNET_OK, GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_shutdown(), GNUNET_SERVICE_resume(), GNUNET_SERVICE_suspend(), GNUNET_STATISTICS_create(), GNUNET_SYSERR, GNUNET_YES, GSC_cfg, GSC_KX_init(), GSC_my_identity, GSC_SESSIONS_init(), GSC_stats, GSC_TYPEMAP_init(), pk, service, and shutdown_task().

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◆ GNUNET_SERVICE_MAIN()

GNUNET_SERVICE_MAIN ( "core"  ,
GNUNET_SERVICE_OPTION_NONE  ,
run,
client_connect_cb,
client_disconnect_cb,
NULL  ,
GNUNET_MQ_hd_var_size(client_init, GNUNET_MESSAGE_TYPE_CORE_INIT, struct InitMessage, NULL)  ,
GNUNET_MQ_hd_fixed_size(client_monitor_peers, GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS, struct GNUNET_MessageHeader, NULL)  ,
GNUNET_MQ_hd_fixed_size(client_send_request, GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST, struct SendMessageRequest, NULL)  ,
GNUNET_MQ_hd_var_size(client_send, GNUNET_MESSAGE_TYPE_CORE_SEND, struct SendMessage, NULL)  ,
GNUNET_MQ_handler_end()   
)

Define "main" method using service macro.

Variable Documentation

◆ GSC_my_identity

struct GNUNET_PeerIdentity GSC_my_identity

◆ GSC_cfg

const struct GNUNET_CONFIGURATION_Handle* GSC_cfg

Our configuration.

Definition at line 121 of file gnunet-service-core.c.

Referenced by GSC_KX_init(), run(), shutdown_task(), and sign_ephemeral_key().

◆ GSC_stats

struct GNUNET_STATISTICS_Handle* GSC_stats

◆ all_client_options

uint32_t all_client_options
static

Big "or" of all client options.

Definition at line 131 of file gnunet-service-core.c.

Referenced by client_disconnect_cb(), GSC_CLIENTS_deliver_message(), and handle_client_init().

◆ client_head

struct GSC_Client* client_head
static

◆ client_tail

struct GSC_Client* client_tail
static

Tail of linked list of our clients.

Definition at line 141 of file gnunet-service-core.c.

Referenced by client_connect_cb(), and client_disconnect_cb().