GNUnet debian-0.24.3-26-g2202bbd4d
core_api.c File Reference

core service; this is the main API for encrypted P2P communications More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_constants.h"
#include "gnunet_core_service.h"
#include "core.h"
Include dependency graph for core_api.c:

Go to the source code of this file.

Data Structures

struct  PeerRecord
 Information we track for each peer. More...
 
struct  GNUNET_CORE_Handle
 Context for the core service connection. More...
 

Macros

#define LOG(kind, ...)   GNUNET_log_from (kind, "core-api", __VA_ARGS__)
 

Functions

static void reconnect (struct GNUNET_CORE_Handle *h)
 Our current client connection went down. More...
 
static void reconnect_task (void *cls)
 Task schedule to try to re-connect to core. More...
 
static int disconnect_and_free_peer_entry (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
 Notify clients about disconnect and free the entry for connected peer. More...
 
static void reconnect_later (struct GNUNET_CORE_Handle *h)
 Close down any existing connection to the CORE service and try re-establishing it later. More...
 
static void handle_mq_error (void *cls, enum GNUNET_MQ_Error error)
 Error handler for the message queue to the CORE service. More...
 
static void core_mq_send_impl (struct GNUNET_MQ_Handle *mq, const struct GNUNET_MessageHeader *msg, void *impl_state)
 Implement sending functionality of a message queue for us sending messages to a peer. More...
 
static void core_mq_destroy_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
 Handle destruction of a message queue. More...
 
static void core_mq_cancel_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
 Implementation function that cancels the currently sent message. More...
 
static void core_mq_error_handler (void *cls, enum GNUNET_MQ_Error error)
 We had an error processing a message we forwarded from a peer to the CORE service. More...
 
static void connect_peer (struct GNUNET_CORE_Handle *h, const struct GNUNET_PeerIdentity *peer, enum GNUNET_CORE_PeerClass class)
 Add the given peer to the list of our connected peers and create the respective data structures and notify the application. More...
 
static void handle_init_reply (void *cls, const struct InitReplyMessage *m)
 Handle init reply message received from CORE service. More...
 
static void handle_connect_notify (void *cls, const struct ConnectNotifyMessage *cnm)
 Handle connect message received from CORE service. More...
 
static void handle_disconnect_notify (void *cls, const struct DisconnectNotifyMessage *dnm)
 Handle disconnect message received from CORE service. More...
 
static int check_notify_inbound (void *cls, const struct NotifyTrafficMessage *ntm)
 Check that message received from CORE service is well-formed. More...
 
static void handle_notify_inbound (void *cls, const struct NotifyTrafficMessage *ntm)
 Handle inbound message received from CORE service. More...
 
static void handle_send_ready (void *cls, const struct SendMessageReady *smr)
 Handle message received from CORE service notifying us that we are now allowed to send a message to a peer. More...
 
struct GNUNET_CORE_HandleGNUNET_CORE_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls, GNUNET_CORE_StartupCallback init, GNUNET_CORE_ConnectEventHandler connects, GNUNET_CORE_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers, struct GNUNET_CORE_ServiceInfo *service_info)
 Connect to the core service. More...
 
void GNUNET_CORE_disconnect (struct GNUNET_CORE_Handle *handle)
 Disconnect from the core service. More...
 
struct GNUNET_MQ_HandleGNUNET_CORE_get_mq (const struct GNUNET_CORE_Handle *h, const struct GNUNET_PeerIdentity *pid)
 Obtain the message queue for a connected peer. More...
 

Detailed Description

core service; this is the main API for encrypted P2P communications

Author
Christian Grothoff

Definition in file core_api.c.

Macro Definition Documentation

◆ LOG

#define LOG (   kind,
  ... 
)    GNUNET_log_from (kind, "core-api", __VA_ARGS__)

Definition at line 32 of file core_api.c.

Function Documentation

◆ reconnect()

static void reconnect ( struct GNUNET_CORE_Handle h)
static

Our current client connection went down.

Clean it up and try to reconnect!

Parameters
hour handle to the core service

Definition at line 636 of file core_api.c.

637{
639 { GNUNET_MQ_hd_fixed_size (init_reply,
641 struct InitReplyMessage,
642 h),
646 h),
650 h),
651 GNUNET_MQ_hd_var_size (notify_inbound,
654 h),
655 GNUNET_MQ_hd_fixed_size (send_ready,
657 struct SendMessageReady,
658 h),
660 struct InitMessage *init;
661 struct GNUNET_MQ_Envelope *env;
662 uint16_t *ts;
663
664 GNUNET_assert (NULL == h->mq);
666 if (NULL == h->mq)
667 {
669 return;
670 }
672 sizeof(uint16_t) * h->hcnt,
674 LOG (GNUNET_ERROR_TYPE_INFO, "(Re)connecting to CORE service\n");
675 init->options = htonl (0);
676 ts = (uint16_t *) &init[1];
677 for (unsigned int hpos = 0; hpos < h->hcnt; hpos++)
678 ts[hpos] = htons (h->handlers[hpos].type);
680}
struct GNUNET_MQ_MessageHandlers handlers[]
Definition: 003.c:1
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static void reconnect_later(struct GNUNET_CORE_Handle *h)
Close down any existing connection to the CORE service and try re-establishing it later.
Definition: core_api.c:219
#define LOG(kind,...)
Definition: core_api.c:32
static void handle_mq_error(void *cls, enum GNUNET_MQ_Error error)
Error handler for the message queue to the CORE service.
Definition: core_api.c:245
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:98
static char * init
Set to the name of a service to start.
Definition: gnunet-arm.c:73
static void disconnect_notify(void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
Method called whenever a peer disconnects.
static void * connect_notify(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq, enum GNUNET_CORE_PeerClass class)
Method called whenever a peer connects.
struct GNUNET_MQ_Handle * GNUNET_CLIENT_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *service_name, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *error_handler_cls)
Create a message queue to connect to a GNUnet service.
Definition: client.c:1060
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
@ GNUNET_ERROR_TYPE_INFO
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:305
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#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:61
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
#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.
#define GNUNET_MESSAGE_TYPE_CORE_INIT
Initial setup message from core client to core.
#define GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND
Notify clients about incoming P2P messages.
#define GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY
Response from core to core client to INIT message.
#define GNUNET_MESSAGE_TYPE_CORE_SEND_READY
Confirmation from core that message can now be sent.
Message sent by the service to clients to notify them about a peer connecting.
Definition: core.h:129
Message sent by the service to clients to notify them about a peer disconnecting.
Definition: core.h:158
struct GNUNET_MQ_Handle * mq
Our connection to the ARM service.
Definition: arm_api.c:107
const struct GNUNET_CONFIGURATION_Handle * cfg
The configuration that we are using.
Definition: arm_api.c:112
Message handler for a specific message type.
Message transmitted core clients to gnunet-service-core to start the interaction.
Definition: core.h:82
Message transmitted by the gnunet-service-core process to its clients in response to an INIT message.
Definition: core.h:100
Message sent by the service to clients to notify them about messages being received or transmitted.
Definition: core.h:186
Core notifying client that it is allowed to now transmit a message to the given target (response to G...
Definition: core.h:252

References GNUNET_ARM_Handle::cfg, connect_notify(), disconnect_notify(), env, GNUNET_assert, GNUNET_CLIENT_connect(), GNUNET_ERROR_TYPE_INFO, GNUNET_MESSAGE_TYPE_CORE_INIT, GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY, GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT, GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT, GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND, GNUNET_MESSAGE_TYPE_CORE_SEND_READY, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_hd_var_size, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), h, handle_mq_error(), handlers, init, LOG, GNUNET_ARM_Handle::mq, and reconnect_later().

Referenced by GNUNET_CORE_connect(), and reconnect_task().

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◆ reconnect_task()

static void reconnect_task ( void *  cls)
static

Task schedule to try to re-connect to core.

Parameters
clsthe struct GNUNET_CORE_Handle

Definition at line 168 of file core_api.c.

169{
170 struct GNUNET_CORE_Handle *h = cls;
171
172 h->reconnect_task = NULL;
173 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connecting to CORE service after delay\n");
174 reconnect (h);
175}
static void reconnect(struct GNUNET_CORE_Handle *h)
Our current client connection went down.
Definition: core_api.c:636
@ GNUNET_ERROR_TYPE_DEBUG
struct GNUNET_SCHEDULER_Task * reconnect_task
ID of the reconnect task (if any).
Definition: arm_api.c:147
Context for the core service connection.
Definition: core_api.c:78
void * cls
Closure for the various callbacks.
Definition: core_api.c:87

References GNUNET_CORE_Handle::cls, GNUNET_ERROR_TYPE_DEBUG, h, LOG, reconnect(), and GNUNET_ARM_Handle::reconnect_task.

Referenced by reconnect_later().

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◆ disconnect_and_free_peer_entry()

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

Notify clients about disconnect and free the entry for connected peer.

Parameters
clsthe struct GNUNET_CORE_Handle *
keythe peer identity (not used)
valuethe struct PeerRecord to free.
Returns
GNUNET_YES (continue)

Definition at line 188 of file core_api.c.

191{
192 struct GNUNET_CORE_Handle *h = cls;
193 struct PeerRecord *pr = value;
194
195 GNUNET_assert (pr->h == h);
196 if (NULL != h->disconnects)
197 h->disconnects (h->cls, &pr->peer, pr->client_cls);
200 GNUNET_MQ_destroy (pr->mq);
201 GNUNET_assert (NULL == pr->mq);
202 if (NULL != pr->env)
203 {
205 pr->env = NULL;
206 }
207 GNUNET_free (pr);
208 return GNUNET_YES;
209}
struct GNUNET_HashCode key
The key used in the DHT.
static char * value
Value of the record to add/remove.
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.
@ GNUNET_YES
#define GNUNET_free(ptr)
Wrapper around free.
void GNUNET_MQ_discard(struct GNUNET_MQ_Envelope *mqm)
Discard the message queue message, free all allocated resources.
Definition: mq.c:285
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:700
Information we track for each peer.
Definition: core_api.c:39
struct GNUNET_CORE_Handle * h
Corresponding CORE handle.
Definition: core_api.c:43
void * client_cls
Value the client returned when we connected, used as the closure in various places.
Definition: core_api.c:60
struct GNUNET_PeerIdentity peer
Peer the record is about.
Definition: core_api.c:65
struct GNUNET_MQ_Handle * mq
Message queue for the peer.
Definition: core_api.c:48
struct GNUNET_MQ_Envelope * env
Message we are currently trying to pass to the CORE service for this peer (from mq).
Definition: core_api.c:54

References PeerRecord::client_cls, GNUNET_CORE_Handle::cls, PeerRecord::env, GNUNET_assert, GNUNET_CONTAINER_multipeermap_remove(), GNUNET_free, GNUNET_MQ_destroy(), GNUNET_MQ_discard(), GNUNET_YES, h, PeerRecord::h, key, PeerRecord::mq, PeerRecord::peer, and value.

Referenced by GNUNET_CORE_disconnect(), handle_disconnect_notify(), and reconnect_later().

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◆ reconnect_later()

static void reconnect_later ( struct GNUNET_CORE_Handle h)
static

Close down any existing connection to the CORE service and try re-establishing it later.

Parameters
hour handle

Definition at line 219 of file core_api.c.

220{
221 GNUNET_assert (NULL == h->reconnect_task);
222 if (NULL != h->mq)
223 {
225 h->mq = NULL;
226 }
227 GNUNET_assert (NULL == h->reconnect_task);
232 h);
234}
static int disconnect_and_free_peer_entry(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Notify clients about disconnect and free the entry for connected peer.
Definition: core_api.c:188
static void reconnect_task(void *cls)
Task schedule to try to re-connect to core.
Definition: core_api.c:168
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 GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1277
#define GNUNET_TIME_STD_BACKOFF(r)
Perform our standard exponential back-off calculation, starting at 1 ms and then going by a factor of...
struct GNUNET_TIME_Relative retry_backoff
Current delay we use for re-trying to connect to core.
Definition: arm_api.c:152

References disconnect_and_free_peer_entry(), GNUNET_assert, GNUNET_CONTAINER_multipeermap_iterate(), GNUNET_MQ_destroy(), GNUNET_SCHEDULER_add_delayed(), GNUNET_TIME_STD_BACKOFF, h, GNUNET_ARM_Handle::mq, GNUNET_ARM_Handle::reconnect_task, reconnect_task(), and GNUNET_ARM_Handle::retry_backoff.

Referenced by handle_connect_notify(), handle_disconnect_notify(), handle_mq_error(), handle_notify_inbound(), handle_send_ready(), and reconnect().

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◆ handle_mq_error()

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

Error handler for the message queue to the CORE service.

On errors, we reconnect.

Parameters
clsclosure, a struct GNUNET_CORE_Handle *
errorerror code

Definition at line 245 of file core_api.c.

246{
247 struct GNUNET_CORE_Handle *h = cls;
248
249 LOG (GNUNET_ERROR_TYPE_DEBUG, "MQ ERROR: %d\n", error);
251}

References GNUNET_CORE_Handle::cls, GNUNET_ERROR_TYPE_DEBUG, h, LOG, and reconnect_later().

Referenced by reconnect().

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◆ core_mq_send_impl()

static void core_mq_send_impl ( struct GNUNET_MQ_Handle mq,
const struct GNUNET_MessageHeader msg,
void *  impl_state 
)
static

Implement sending functionality of a message queue for us sending messages to a peer.

Parameters
mqthe message queue
msgthe message to send
impl_statestate of the implementation

Definition at line 263 of file core_api.c.

266{
267 struct PeerRecord *pr = impl_state;
268 struct GNUNET_CORE_Handle *h = pr->h;
269 struct SendMessageRequest *smr;
270 struct SendMessage *sm;
271 struct GNUNET_MQ_Envelope *env;
272 uint16_t msize;
274
275 if (NULL == h->mq)
276 {
277 /* We're currently reconnecting, pretend this worked */
279 return;
280 }
281 GNUNET_assert (NULL == pr->env);
282 /* extract options from envelope */
285
286 /* check message size for sanity */
287 msize = ntohs (msg->size);
288 if (msize >= GNUNET_MAX_MESSAGE_SIZE - sizeof(struct SendMessage))
289 {
290 GNUNET_break (0);
292 return;
293 }
294
295 /* ask core for transmission */
297 "Asking core for transmission of %u bytes to `%s'\n",
298 (unsigned int) msize,
299 GNUNET_i2s (&pr->peer));
301 smr->priority = htonl ((uint32_t) flags);
302 smr->peer = pr->peer;
303 smr->size = htons (msize);
304 smr->smr_id = htons (++pr->smr_id_gen);
306
307 /* prepare message with actual transmission data */
309 sm->priority = htonl ((uint32_t) flags);
310 sm->peer = pr->peer;
312 "Calling get_message with buffer of %u bytes\n",
313 (unsigned int) msize);
314}
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message,...
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
#define GNUNET_MQ_msg_nested_mh(mvar, type, mh)
Allocate a GNUNET_MQ_Envelope, and append a payload message after the given message struct.
void GNUNET_MQ_impl_send_continue(struct GNUNET_MQ_Handle *mq)
Call the send implementation for the next queued message, if any.
Definition: mq.c:437
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:76
GNUNET_MQ_PriorityPreferences
Per envelope preferences and priorities.
enum GNUNET_MQ_PriorityPreferences GNUNET_MQ_env_get_options(struct GNUNET_MQ_Envelope *env)
Get performance preferences set for this envelope.
Definition: mq.c:856
struct GNUNET_MQ_Envelope * GNUNET_MQ_get_current_envelope(struct GNUNET_MQ_Handle *mq)
Function to obtain the current envelope from within GNUNET_MQ_SendImpl implementations.
Definition: mq.c:830
#define GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST
Request from client to transmit message.
#define GNUNET_MESSAGE_TYPE_CORE_SEND
Client with message to transmit (after SEND_READY confirmation was received).
uint16_t smr_id_gen
SendMessageRequest ID generator for this peer.
Definition: core_api.c:70
Client notifying core about the maximum-priority message it has in the queue for a particular target.
Definition: core.h:207
uint32_t priority
How important is this message?
Definition: core.h:216
struct GNUNET_PeerIdentity peer
Identity of the intended target.
Definition: core.h:227
uint16_t size
How large is the message?
Definition: core.h:237
uint16_t smr_id
Counter for this peer to match SMRs to replies.
Definition: core.h:242
Client asking core to transmit a particular message to a particular target (response to GNUNET_MESSAG...
Definition: core.h:283
uint32_t priority
How important is this message? Contains a enum GNUNET_MQ_PriorityPreferences in NBO.
Definition: core.h:293
struct GNUNET_PeerIdentity peer
Identity of the intended receiver.
Definition: core.h:304

References env, PeerRecord::env, GNUNET_assert, GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_MAX_MESSAGE_SIZE, GNUNET_MESSAGE_TYPE_CORE_SEND, GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST, GNUNET_MQ_env_get_options(), GNUNET_MQ_get_current_envelope(), GNUNET_MQ_impl_send_continue(), GNUNET_MQ_msg, GNUNET_MQ_msg_nested_mh, GNUNET_MQ_send(), h, PeerRecord::h, LOG, mq, GNUNET_ARM_Handle::mq, msg, SendMessageRequest::peer, SendMessage::peer, PeerRecord::peer, SendMessageRequest::priority, SendMessage::priority, GNUNET_MessageHeader::size, SendMessageRequest::size, SendMessageRequest::smr_id, and PeerRecord::smr_id_gen.

Referenced by connect_peer().

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◆ core_mq_destroy_impl()

static void core_mq_destroy_impl ( struct GNUNET_MQ_Handle mq,
void *  impl_state 
)
static

Handle destruction of a message queue.

Implementations must not free mq, but should take care of impl_state.

Parameters
mqthe message queue to destroy
impl_statestate of the implementation

Definition at line 325 of file core_api.c.

326{
327 struct PeerRecord *pr = impl_state;
328
329 GNUNET_assert (mq == pr->mq);
330 pr->mq = NULL;
331}

References GNUNET_assert, mq, and PeerRecord::mq.

Referenced by connect_peer().

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◆ core_mq_cancel_impl()

static void core_mq_cancel_impl ( struct GNUNET_MQ_Handle mq,
void *  impl_state 
)
static

Implementation function that cancels the currently sent message.

Should basically undo whatever mq_send_impl() did.

Parameters
mqmessage queue
impl_statestate specific to the implementation

Definition at line 342 of file core_api.c.

343{
344 struct PeerRecord *pr = impl_state;
345
346 (void) mq;
347 GNUNET_assert (NULL != pr->env);
349 pr->env = NULL;
350}

References PeerRecord::env, GNUNET_assert, GNUNET_MQ_discard(), and mq.

Referenced by connect_peer().

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◆ core_mq_error_handler()

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

We had an error processing a message we forwarded from a peer to the CORE service.

We should just complain about it but otherwise continue processing.

Parameters
clsclosure
errorerror code

Definition at line 362 of file core_api.c.

363{
364 /* struct PeerRecord *pr = cls; */
365 (void) cls;
366 (void) error;
367 GNUNET_break_op (0);
368}
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.

References GNUNET_break_op.

Referenced by connect_peer().

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◆ connect_peer()

static void connect_peer ( struct GNUNET_CORE_Handle h,
const struct GNUNET_PeerIdentity peer,
enum GNUNET_CORE_PeerClass  class 
)
static

Add the given peer to the list of our connected peers and create the respective data structures and notify the application.

Parameters
hthe core handle
peerthe peer that is connecting to us
classclass of the connecting peer

Definition at line 381 of file core_api.c.

384{
385 struct PeerRecord *pr;
386
387 pr = GNUNET_new (struct PeerRecord);
388 pr->peer = *peer;
389 pr->h = h;
392 h->peers,
393 &pr->peer,
394 pr,
399 pr,
400 h->handlers,
402 pr);
403 if (NULL != h->connects)
404 {
405 pr->client_cls = h->connects (h->cls, &pr->peer, pr->mq, class);
407 }
408}
static void core_mq_send_impl(struct GNUNET_MQ_Handle *mq, const struct GNUNET_MessageHeader *msg, void *impl_state)
Implement sending functionality of a message queue for us sending messages to a peer.
Definition: core_api.c:263
static void core_mq_cancel_impl(struct GNUNET_MQ_Handle *mq, void *impl_state)
Implementation function that cancels the currently sent message.
Definition: core_api.c:342
static void core_mq_destroy_impl(struct GNUNET_MQ_Handle *mq, void *impl_state)
Handle destruction of a message queue.
Definition: core_api.c:325
static void core_mq_error_handler(void *cls, enum GNUNET_MQ_Error error)
We had an error processing a message we forwarded from a peer to the CORE service.
Definition: core_api.c:362
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_new(type)
Allocate a struct or union of the given type.
struct GNUNET_MQ_Handle * GNUNET_MQ_queue_for_callbacks(GNUNET_MQ_SendImpl send, GNUNET_MQ_DestroyImpl destroy, GNUNET_MQ_CancelImpl cancel, void *impl_state, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *cls)
Create a message queue for the specified handlers.
Definition: mq.c:482
void GNUNET_MQ_set_handlers_closure(struct GNUNET_MQ_Handle *mq, void *handlers_cls)
Change the closure argument in all of the handlers of the mq.
Definition: mq.c:506

References PeerRecord::client_cls, core_mq_cancel_impl(), core_mq_destroy_impl(), core_mq_error_handler(), core_mq_send_impl(), GNUNET_assert, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_put(), GNUNET_MQ_queue_for_callbacks(), GNUNET_MQ_set_handlers_closure(), GNUNET_new, GNUNET_YES, h, PeerRecord::h, PeerRecord::mq, and PeerRecord::peer.

Referenced by handle_connect_notify(), and handle_init_reply().

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◆ handle_init_reply()

static void handle_init_reply ( void *  cls,
const struct InitReplyMessage m 
)
static

Handle init reply message received from CORE service.

Notify application that we are now connected to the CORE. Also fake loopback connection.

Parameters
clsthe struct GNUNET_CORE_Handle
mthe init reply

Definition at line 420 of file core_api.c.

421{
422 struct GNUNET_CORE_Handle *h = cls;
424
425 GNUNET_break (0 == ntohl (m->reserved));
427 if (NULL != (init = h->init))
428 {
429 /* mark so we don't call init on reconnect */
430 h->init = NULL;
431 h->me = m->my_identity;
433 "Connected to core service of peer `%s'.\n",
434 GNUNET_i2s (&h->me));
435 h->have_init = GNUNET_YES;
436 init (h->cls, &h->me);
437 }
438 else
439 {
441 "Successfully reconnected to core service.\n");
442 if (GNUNET_NO == h->have_init)
443 {
444 h->me = m->my_identity;
445 h->have_init = GNUNET_YES;
446 }
447 else
448 {
449 GNUNET_break (0 == memcmp (&h->me,
450 &m->my_identity,
451 sizeof(struct GNUNET_PeerIdentity)));
452 }
453 }
454 /* fake 'connect to self' */
455 connect_peer (h, &h->me, m->class);
456}
static void connect_peer(struct GNUNET_CORE_Handle *h, const struct GNUNET_PeerIdentity *peer, enum GNUNET_CORE_PeerClass class)
Add the given peer to the list of our connected peers and create the respective data structures and n...
Definition: core_api.c:381
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:103
void(* GNUNET_CORE_StartupCallback)(void *cls, const struct GNUNET_PeerIdentity *my_identity)
Function called after GNUNET_CORE_connect has succeeded (or failed for good).
@ GNUNET_NO
#define GNUNET_TIME_UNIT_MILLISECONDS
One millisecond.
The identity of the host (wraps the signing key of the peer).

References GNUNET_CORE_Handle::cls, connect_peer(), GNUNET_break, GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_NO, GNUNET_TIME_UNIT_MILLISECONDS, GNUNET_YES, h, init, LOG, m, and GNUNET_ARM_Handle::retry_backoff.

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◆ handle_connect_notify()

static void handle_connect_notify ( void *  cls,
const struct ConnectNotifyMessage cnm 
)
static

Handle connect message received from CORE service.

Notify the application about the new connection.

Parameters
clsthe struct GNUNET_CORE_Handle
cnmthe connect message

Definition at line 467 of file core_api.c.

468{
469 struct GNUNET_CORE_Handle *h = cls;
470 struct PeerRecord *pr;
471
473 "Received notification about connection from `%s'.\n",
474 GNUNET_i2s (&cnm->peer));
475 if (0 == memcmp (&h->me, &cnm->peer, sizeof(struct GNUNET_PeerIdentity)))
476 {
477 /* connect to self!? */
478 GNUNET_break (0);
479 return;
480 }
481 pr = GNUNET_CONTAINER_multipeermap_get (h->peers, &cnm->peer);
482 if (NULL != pr)
483 {
484 GNUNET_break (0);
486 return;
487 }
488 connect_peer (h, &cnm->peer, cnm->peer_class);
489}
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.
struct GNUNET_PeerIdentity peer
Identity of the connecting peer.
Definition: core.h:143
enum GNUNET_CORE_PeerClass peer_class
Class of the connecting peer TODO is it correct to send an enum like this?
Definition: core.h:149

References GNUNET_CORE_Handle::cls, connect_peer(), GNUNET_break, GNUNET_CONTAINER_multipeermap_get(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), h, LOG, ConnectNotifyMessage::peer, ConnectNotifyMessage::peer_class, and reconnect_later().

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◆ handle_disconnect_notify()

static void handle_disconnect_notify ( void *  cls,
const struct DisconnectNotifyMessage dnm 
)
static

Handle disconnect message received from CORE service.

Notify the application about the lost connection.

Parameters
clsthe struct GNUNET_CORE_Handle
dnmmessage about the disconnect event

Definition at line 500 of file core_api.c.

501{
502 struct GNUNET_CORE_Handle *h = cls;
503 struct PeerRecord *pr;
504
505 if (0 == memcmp (&h->me, &dnm->peer, sizeof(struct GNUNET_PeerIdentity)))
506 {
507 /* disconnect from self!? */
508 GNUNET_break (0);
509 return;
510 }
511 GNUNET_break (0 == ntohl (dnm->reserved));
513 "Received notification about disconnect from `%s'.\n",
514 GNUNET_i2s (&dnm->peer));
515 pr = GNUNET_CONTAINER_multipeermap_get (h->peers, &dnm->peer);
516 if (NULL == pr)
517 {
518 GNUNET_break (0);
520 return;
521 }
523}
uint32_t reserved
Always zero.
Definition: core.h:167
struct GNUNET_PeerIdentity peer
Identity of the connecting peer.
Definition: core.h:172

References GNUNET_CORE_Handle::cls, disconnect_and_free_peer_entry(), GNUNET_break, GNUNET_CONTAINER_multipeermap_get(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), h, LOG, DisconnectNotifyMessage::peer, PeerRecord::peer, reconnect_later(), and DisconnectNotifyMessage::reserved.

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◆ check_notify_inbound()

static int check_notify_inbound ( void *  cls,
const struct NotifyTrafficMessage ntm 
)
static

Check that message received from CORE service is well-formed.

Parameters
clsthe struct GNUNET_CORE_Handle
ntmthe message we got
Returns
GNUNET_OK if the message is well-formed

Definition at line 534 of file core_api.c.

535{
536 uint16_t msize;
537 const struct GNUNET_MessageHeader *em;
538
539 (void) cls;
540 msize = ntohs (ntm->header.size) - sizeof(struct NotifyTrafficMessage);
541 if (msize < sizeof(struct GNUNET_MessageHeader))
542 {
543 GNUNET_break (0);
544 return GNUNET_SYSERR;
545 }
546 em = (const struct GNUNET_MessageHeader *) &ntm[1];
547 if (msize != ntohs (em->size))
548 {
549 GNUNET_break (0);
550 return GNUNET_SYSERR;
551 }
552 return GNUNET_OK;
553}
@ GNUNET_OK
@ GNUNET_SYSERR
Header for all communications.
struct GNUNET_MessageHeader header
Header with type GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND or GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND.
Definition: core.h:191

References GNUNET_break, GNUNET_OK, GNUNET_SYSERR, NotifyTrafficMessage::header, and GNUNET_MessageHeader::size.

◆ handle_notify_inbound()

static void handle_notify_inbound ( void *  cls,
const struct NotifyTrafficMessage ntm 
)
static

Handle inbound message received from CORE service.

If applicable, notify the application.

Parameters
clsthe struct GNUNET_CORE_Handle
ntmthe message we got from CORE.

Definition at line 564 of file core_api.c.

565{
566 struct GNUNET_CORE_Handle *h = cls;
567 const struct GNUNET_MessageHeader *em;
568 struct PeerRecord *pr;
569
571 "Received inbound message from `%s'.\n",
572 GNUNET_i2s (&ntm->peer));
573 em = (const struct GNUNET_MessageHeader *) &ntm[1];
574 pr = GNUNET_CONTAINER_multipeermap_get (h->peers, &ntm->peer);
575 if (NULL == pr)
576 {
577 GNUNET_break (0);
579 return;
580 }
582}
void GNUNET_MQ_inject_message(struct GNUNET_MQ_Handle *mq, const struct GNUNET_MessageHeader *mh)
Call the message message handler that was registered for the type of the given message in the given m...
Definition: mq.c:187
struct GNUNET_PeerIdentity peer
Identity of the receiver or sender.
Definition: core.h:196

References GNUNET_CORE_Handle::cls, GNUNET_break, GNUNET_CONTAINER_multipeermap_get(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_MQ_inject_message(), h, LOG, PeerRecord::mq, NotifyTrafficMessage::peer, and reconnect_later().

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◆ handle_send_ready()

static void handle_send_ready ( void *  cls,
const struct SendMessageReady smr 
)
static

Handle message received from CORE service notifying us that we are now allowed to send a message to a peer.

If that message is still pending, put it into the queue to be transmitted.

Parameters
clsthe struct GNUNET_CORE_Handle
smrthe message we got

Definition at line 594 of file core_api.c.

595{
596 struct GNUNET_CORE_Handle *h = cls;
597 struct PeerRecord *pr;
598
599 pr = GNUNET_CONTAINER_multipeermap_get (h->peers, &smr->peer);
600 if (NULL == pr)
601 {
602 GNUNET_break (0);
604 return;
605 }
607 "Received notification about transmission readiness to `%s'.\n",
608 GNUNET_i2s (&smr->peer));
609 if (NULL == pr->env)
610 {
611 /* request must have been cancelled between the original request
612 * and the response from CORE, ignore CORE's readiness */
613 return;
614 }
615 if (ntohs (smr->smr_id) != pr->smr_id_gen)
616 {
617 /* READY message is for expired or cancelled message,
618 * ignore! (we should have already sent another request) */
619 return;
620 }
621
622 /* ok, all good, send message out! */
623 GNUNET_MQ_send (h->mq, pr->env);
624 pr->env = NULL;
626}
uint16_t smr_id
smr_id from the request.
Definition: core.h:269
struct GNUNET_PeerIdentity peer
Identity of the intended target.
Definition: core.h:274

References GNUNET_CORE_Handle::cls, PeerRecord::env, GNUNET_break, GNUNET_CONTAINER_multipeermap_get(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_MQ_impl_send_continue(), GNUNET_MQ_send(), h, LOG, GNUNET_ARM_Handle::mq, PeerRecord::mq, SendMessageReady::peer, reconnect_later(), SendMessageReady::smr_id, and PeerRecord::smr_id_gen.

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