GNUnet  0.11.x
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
Definition: gnunet_common.h:97
@ GNUNET_NO
Definition: gnunet_common.h:94
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:95

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.
#define GNUNET_log(kind,...)
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_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:355
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#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:2244
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 }
int 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:2325
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 != memcmp (&car->target,
276  sizeof(struct GNUNET_PeerIdentity)));
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?
int 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).
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:263
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:557
The identity of the host (wraps the signing key of the peer).
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_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 == memcmp (&req->peer,
319  sizeof(struct GNUNET_PeerIdentity)));
320  if ((! is_loopback) &&
321  (GNUNET_YES !=
323  {
324  /* neighbour must have disconnected since request was issued,
325  * ignore (client will realize it once it processes the
326  * disconnect notification) */
328  gettext_noop (
329  "# send requests dropped (disconnected)"),
330  1,
331  GNUNET_NO);
333  return;
334  }
335 
337  if (NULL == car)
338  {
339  /* create new entry */
340  car = GNUNET_new (struct GSC_ClientActiveRequest);
343  c->requests,
344  &req->peer,
345  car,
347  car->client_handle = c;
348  }
349  else
350  {
351  /* dequeue and recycle memory from pending request, there can only
352  be at most one per client and peer */
354  gettext_noop (
355  "# dequeuing CAR (duplicate request)"),
356  1,
357  GNUNET_NO);
360  "Transmission request to `%s' was a duplicate!\n",
361  GNUNET_i2s (&req->peer));
362  }
363  car->target = req->peer;
366  car->priority = (enum GNUNET_MQ_PriorityPreferences) ntohl (req->priority);
367  car->msize = ntohs (req->size);
368  car->smr_id = req->smr_id;
369  car->was_solicited = GNUNET_NO;
371  if (is_loopback)
372  {
373  /* loopback, satisfy immediately */
375  return;
376  }
378 }
#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:86
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:542
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_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 411 of file gnunet-service-core.c.

412 {
413  struct TokenizerContext *tc = cls;
414  struct GSC_ClientActiveRequest *car = tc->car;
415  char buf[92];
416 
418  sizeof(buf),
419  gettext_noop ("# bytes of messages of type %u received"),
420  (unsigned int) ntohs (message->type));
421  GNUNET_STATISTICS_update (GSC_stats, buf, ntohs (message->size), GNUNET_NO);
422  if (0 == memcmp (&car->target,
424  sizeof(struct GNUNET_PeerIdentity)))
425  {
427  "Delivering message of type %u to myself\n",
428  ntohs (message->type));
430  message,
431  ntohs (message->size),
434  message,
435  sizeof(struct GNUNET_MessageHeader),
438  message,
439  ntohs (message->size),
442  message,
443  sizeof(struct GNUNET_MessageHeader),
445  }
446  else
447  {
449  "Delivering message of type %u and size %u to %s\n",
450  ntohs (message->type),
451  ntohs (message->size),
452  GNUNET_i2s (&car->target));
454  message,
455  ntohs (message->size),
458  message,
459  sizeof(struct GNUNET_MessageHeader),
461  GSC_SESSIONS_transmit (car, message, tc->priority);
462  }
463  return GNUNET_OK;
464 }
#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_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 475 of file gnunet-service-core.c.

476 {
477  return GNUNET_OK;
478 }

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 488 of file gnunet-service-core.c.

489 {
490  struct GSC_Client *c = cls;
491  struct TokenizerContext tc;
492  uint16_t msize;
494  struct GNUNET_MessageStreamTokenizer *mst;
495 
496  msize = ntohs (sm->header.size) - sizeof(struct SendMessage);
498  if (NULL == tc.car)
499  {
500  /* Must have been that we first approved the request, then got disconnected
501  * (which triggered removal of the 'car') and now the client gives us a message
502  * just *before* the client learns about the disconnect. Theoretically, we
503  * might also now be *again* connected. So this can happen (but should be
504  * rare). If it does happen, the message is discarded. */GNUNET_STATISTICS_update (GSC_stats,
505  gettext_noop (
506  "# messages discarded (session disconnected)"),
507  1,
508  GNUNET_NO);
510  return;
511  }
512  delay = GNUNET_TIME_absolute_get_duration (tc.car->received_time);
513  tc.priority = (enum GNUNET_MQ_PriorityPreferences) ntohl (sm->priority);
516  "Client waited %s for transmission of %u bytes to `%s'\n",
518  msize,
519  GNUNET_i2s (&sm->peer));
520  else
522  "Client waited %s for transmission of %u bytes to `%s'\n",
524  msize,
525  GNUNET_i2s (&sm->peer));
526 
527  GNUNET_assert (
528  GNUNET_YES ==
530  mst = GNUNET_MST_create (&tokenized_cb, &tc);
532  (const char *) &sm[1],
533  msize,
534  GNUNET_YES,
535  GNUNET_NO);
536  GNUNET_MST_destroy (mst);
538  GNUNET_free (tc.car);
540 }
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:411
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 552 of file gnunet-service-core.c.

555 {
556  struct GSC_ClientActiveRequest *car = value;
557 
558  GNUNET_assert (
559  GNUNET_YES ==
561  &car->target,
562  car));
564  GNUNET_free (car);
565  return GNUNET_YES;
566 }
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 578 of file gnunet-service-core.c.

581 {
582  struct GSC_Client *c;
583 
584  c = GNUNET_new (struct GSC_Client);
585  c->client = client;
586  c->mq = mq;
589  return c;
590 }
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 601 of file gnunet-service-core.c.

604 {
605  struct GSC_Client *c = app_ctx;
606 
608  "Client %p has disconnected from core service.\n",
609  client);
611  if (NULL != c->requests)
612  {
615  NULL);
617  }
619  c->connectmap = NULL;
620  if (NULL != c->types)
621  {
622  GSC_TYPEMAP_remove (c->types, c->tcnt);
623  GNUNET_free (c->types);
624  }
625  GNUNET_free (c);
626 
627  /* recalculate 'all_client_options' */
628  all_client_options = 0;
629  for (c = client_head; NULL != c; c = c->next)
631 }
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 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 645 of file gnunet-service-core.c.

650 {
651  struct GNUNET_MQ_Envelope *env;
652  int old_match;
653  int new_match;
654 
655  if (GNUNET_YES != client->got_init)
656  return;
657  old_match = GSC_TYPEMAP_test_match (tmap_old, client->types, client->tcnt);
658  new_match = GSC_TYPEMAP_test_match (tmap_new, client->types, client->tcnt);
660  "Notifying client about neighbour %s (%d/%d)\n",
661  GNUNET_i2s (neighbour),
662  old_match,
663  new_match);
664  if (old_match == new_match)
665  {
666  GNUNET_assert (
667  old_match ==
669  return; /* no change */
670  }
671  if (GNUNET_NO == old_match)
672  {
673  struct ConnectNotifyMessage *cnm;
674 
675  /* send connect */
676  GNUNET_assert (
677  GNUNET_NO ==
681  client->connectmap,
682  neighbour,
683  NULL,
686  cnm->reserved = htonl (0);
688  "Sending NOTIFY_CONNECT message about peer %s to client.\n",
689  GNUNET_i2s (neighbour));
690  cnm->peer = *neighbour;
691  GNUNET_MQ_send (client->mq, env);
692  }
693  else
694  {
695  struct DisconnectNotifyMessage *dcm;
696 
697  /* send disconnect */
698  GNUNET_assert (
699  GNUNET_YES ==
703  neighbour,
704  NULL));
706  dcm->reserved = htonl (0);
708  "Sending NOTIFY_DISCONNECT message about peer %s to client.\n",
709  GNUNET_i2s (neighbour));
710  dcm->peer = *neighbour;
711  GNUNET_MQ_send (client->mq, env);
712  }
713 }
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 726 of file gnunet-service-core.c.

730 {
731  struct GSC_Client *c;
732 
733  for (c = client_head; NULL != c; c = c->next)
735  neighbour,
736  tmap_old,
737  tmap_new);
738 }
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 753 of file gnunet-service-core.c.

757 {
758  size_t size = msize + sizeof(struct NotifyTrafficMessage);
759 
761  {
762  GNUNET_break (0);
763  return;
764  }
765  if (! ((0 != (all_client_options & options)) ||
767  return; /* no client cares about this message notification */
769  "Core service passes message from `%s' of type %u to client.\n",
770  GNUNET_i2s (sender),
771  (unsigned int) ntohs (msg->type));
772  GSC_SESSIONS_add_to_typemap (sender, ntohs (msg->type));
773 
774  for (struct GSC_Client *c = client_head; NULL != c; c = c->next)
775  {
776  struct GNUNET_MQ_Envelope *env;
777  struct NotifyTrafficMessage *ntm;
778  uint16_t mtype;
779  unsigned int qlen;
780  int tm;
781 
782  tm = type_match (ntohs (msg->type), c);
783  if (! ((0 != (c->options & options)) ||
785  (GNUNET_YES == tm))))
786  continue; /* neither options nor type match permit the message */
788  ((0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
789  (GNUNET_YES == tm)))
790  continue;
792  (0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND)))
793  continue;
794 
795  /* Drop messages if:
796  1) We are above the hard limit, or
797  2) We are above the soft limit, and a coin toss limited
798  to the message size (giving larger messages a
799  proportionally higher chance of being queued) falls
800  below the threshold. The threshold is based on where
801  we are between the soft and the hard limit, scaled
802  to match the range of message sizes we usually encounter
803  (i.e. up to 32k); so a 64k message has a 50% chance of
804  being kept if we are just barely below the hard max,
805  and a 99% chance of being kept if we are at the soft max.
806  The reason is to make it more likely to drop control traffic
807  (ACK, queries) which may be cumulative or highly redundant,
808  and cheap to drop than data traffic. */qlen = GNUNET_MQ_get_length (c->mq);
809  if ((qlen >= HARD_MAX_QUEUE) ||
810  ((qlen > SOFT_MAX_QUEUE) &&
812  ntohs (msg->size))) <
813  (qlen - SOFT_MAX_QUEUE) * 0x8000
815  {
816  char buf[1024];
817 
818  GNUNET_log (
820  "Dropping decrypted message of type %u as client is too busy (queue full)\n",
821  (unsigned int) ntohs (msg->type));
823  sizeof(buf),
824  gettext_noop (
825  "# messages of type %u discarded (client busy)"),
826  (unsigned int) ntohs (msg->type));
828  continue;
829  }
830 
831  GNUNET_log (
833  "Sending %u message with %u bytes to client interested in messages of type %u.\n",
834  options,
835  ntohs (msg->size),
836  (unsigned int) ntohs (msg->type));
837 
841  else
843  env = GNUNET_MQ_msg_extra (ntm, msize, mtype);
844  ntm->peer = *sender;
845  GNUNET_memcpy (&ntm[1], msg, msize);
846 
847  GNUNET_assert (
848  (0 == (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
849  (GNUNET_YES != tm) ||
850  (GNUNET_YES ==
851  GNUNET_CONTAINER_multipeermap_contains (c->connectmap, sender)));
852  GNUNET_MQ_send (c->mq, env);
853  }
854 }
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_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
#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_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:337
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct.
Definition: gnunet_mq_lib.h:52
#define GNUNET_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 864 of file gnunet-service-core.c.

865 {
866  struct GSC_Client *c;
867 
868  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core service shutting down.\n");
869  while (NULL != (c = client_head))
872  GSC_KX_done ();
873  GSC_TYPEMAP_done ();
874  if (NULL != GSC_stats)
875  {
877  GSC_stats = NULL;
878  }
879  GSC_cfg = NULL;
880 }
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 893 of file gnunet-service-core.c.

895 {
896  struct GSC_Client *c = cls;
897 
900 }
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 911 of file gnunet-service-core.c.

914 {
916  char *keyfile;
917 
918  GSC_cfg = c;
919  if (GNUNET_OK !=
921  "PEER",
922  "PRIVATE_KEY",
923  &keyfile))
924  {
925  GNUNET_log (
927  _ ("Core service is lacking HOSTKEY configuration setting. Exiting.\n"));
929  return;
930  }
934  GSC_TYPEMAP_init ();
935  if (GNUNET_SYSERR ==
937  GNUNET_YES,
938  &pk))
939  {
941  "Failed to setup peer's private key\n");
943  GNUNET_free (keyfile);
944  return;
945  }
946  GNUNET_free (keyfile);
947  if (GNUNET_OK != GSC_KX_init (&pk))
948  {
950  return;
951  }
955  _ ("Core service of `%s' ready.\n"),
957 }
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.
@ GNUNET_SYSERR
Definition: gnunet_common.h:93
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.
int 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_ERROR_TYPE_ERROR
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
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:1331
void GNUNET_SERVICE_suspend(struct GNUNET_SERVICE_Handle *sh)
Suspend accepting connections from the listen socket temporarily.
Definition: service.c:2183
void GNUNET_SERVICE_resume(struct GNUNET_SERVICE_Handle *sh)
Resume accepting connections from the listen socket.
Definition: service.c:2195
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().