GNUnet 0.21.1
gnunet-service-fs_cp.c File Reference

API to handle 'connected peers'. More...

Include dependency graph for gnunet-service-fs_cp.c:

Go to the source code of this file.

Data Structures

struct  GSF_PeerTransmitHandle
 Handle to cancel a transmission request. More...
 
struct  GSF_DelayedHandle
 Handle for an entry in our delay list. More...
 
struct  PeerRequest
 Information per peer and request. More...
 
struct  GSF_ConnectedPeer
 A connected peer. More...
 
struct  TestExistClosure
 Closure for test_exist_cb(). More...
 
struct  IterationContext
 Closure for call_iterator(). More...
 

Macros

#define RUNAVG_DELAY_N   16
 Ratio for moving average delay calculation. More...
 
#define RESPECT_FLUSH_FREQ
 How often do we flush respect values to disk? More...
 
#define REPLY_TIMEOUT
 After how long do we discard a reply? More...
 
#define INSANE_STATISTICS   GNUNET_NO
 Collect an instance number of statistics? May cause excessive IPC. More...
 
#define N   ((double) 128.0)
 

Functions

void GSF_update_peer_latency_ (const struct GNUNET_PeerIdentity *id, struct GNUNET_TIME_Relative latency)
 Update the latency information kept for the given peer. More...
 
struct GSF_PeerPerformanceDataGSF_get_peer_performance_data_ (struct GSF_ConnectedPeer *cp)
 Return the performance data record for the given peer. More...
 
static void peer_transmit (struct GSF_ConnectedPeer *cp)
 Core is ready to transmit to a peer, get the message. More...
 
static void schedule_transmission (struct GSF_PeerTransmitHandle *pth)
 If ready (bandwidth reserved), try to schedule transmission via core for the given handle. More...
 
static void peer_respect_cb (void *cls, const struct GNUNET_PEERSTORE_Record *record, const char *emsg)
 Function called by PEERSTORE with peer respect record. More...
 
static int consider_peer_for_forwarding (void *cls, const struct GNUNET_HashCode *key, struct GSF_PendingRequest *pr)
 Function called for each pending request whenever a new peer connects, giving us a chance to decide about submitting the existing request to the new peer. More...
 
void * GSF_peer_connect_handler (void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
 A peer connected to us. More...
 
static void revive_migration (void *cls)
 It may be time to re-start migrating content to this peer. More...
 
struct GSF_ConnectedPeerGSF_peer_get_ (const struct GNUNET_PeerIdentity *peer)
 Get a handle for a connected peer. More...
 
void handle_p2p_migration_stop (void *cls, const struct MigrationStopMessage *msm)
 Handle P2P GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP message. More...
 
static void free_pending_request (struct PeerRequest *peerreq)
 Free resources associated with the given peer request. More...
 
static int cancel_pending_request (void *cls, const struct GNUNET_HashCode *query, void *value)
 Cancel all requests associated with the peer. More...
 
static void peer_request_destroy (void *cls)
 Free the given request. More...
 
static void transmit_delayed_now (void *cls)
 The artificial delay is over, transmit the message now. More...
 
static struct GNUNET_TIME_Relative get_randomized_delay ()
 Get the randomized delay a response should be subjected to. More...
 
static void handle_p2p_reply (void *cls, enum GNUNET_BLOCK_ReplyEvaluationResult eval, struct GSF_PendingRequest *pr, uint32_t reply_anonymity_level, struct GNUNET_TIME_Absolute expiration, struct GNUNET_TIME_Absolute last_transmission, enum GNUNET_BLOCK_Type type, const void *data, size_t data_len)
 Handle a reply to a pending request. More...
 
static int change_peer_respect (struct GSF_ConnectedPeer *cp, int value)
 Increase the peer's respect by a value. More...
 
static int32_t bound_priority (uint32_t prio_in, struct GSF_ConnectedPeer *cp)
 We've received a request with the specified priority. More...
 
static int32_t bound_ttl (int32_t ttl_in, uint32_t prio)
 The priority level imposes a bound on the maximum value for the ttl that can be requested. More...
 
static int test_exist_cb (void *cls, const struct GNUNET_HashCode *hc, void *value)
 Test if the query already exists. More...
 
void handle_p2p_get (void *cls, const struct GetMessage *gm)
 Handle P2P "QUERY" message. More...
 
void GSF_peer_transmit_ (struct GSF_ConnectedPeer *cp, int is_query, uint32_t priority, struct GNUNET_MQ_Envelope *env)
 Transmit a message to the given peer as soon as possible. More...
 
void GSF_peer_update_performance_ (struct GSF_ConnectedPeer *cp, struct GNUNET_TIME_Absolute request_time, uint32_t request_priority)
 Report on receiving a reply; update the performance record of the given peer. More...
 
void GSF_peer_update_responder_client_ (struct GSF_ConnectedPeer *cp, struct GSF_LocalClient *initiator_client)
 Report on receiving a reply in response to an initiating client. More...
 
void GSF_peer_update_responder_peer_ (struct GSF_ConnectedPeer *cp, const struct GSF_ConnectedPeer *initiator_peer)
 Report on receiving a reply in response to an initiating peer. More...
 
static int flush_respect (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
 Write peer-respect information to a file - flush the buffer entry! More...
 
void GSF_peer_disconnect_handler (void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
 A peer disconnected from us. More...
 
static int call_iterator (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
 Function that calls the callback for each peer. More...
 
void GSF_iterate_connected_peers_ (GSF_ConnectedPeerIterator it, void *it_cls)
 Iterate over all connected peers. More...
 
void GSF_connected_peer_get_identity_ (const struct GSF_ConnectedPeer *cp, struct GNUNET_PeerIdentity *id)
 Obtain the identity of a connected peer. More...
 
const struct GNUNET_PeerIdentityGSF_connected_peer_get_identity2_ (const struct GSF_ConnectedPeer *cp)
 Obtain the identity of a connected peer. More...
 
void GSF_block_peer_migration_ (struct GSF_ConnectedPeer *cp, struct GNUNET_TIME_Absolute block_time)
 Ask a peer to stop migrating data to us until the given point in time. More...
 
void GSF_connected_peer_change_preference_ (struct GSF_ConnectedPeer *cp, uint64_t pref)
 Notify core about a preference we have for the given peer (to allocate more resources towards it). More...
 
static void cron_flush_respect (void *cls)
 Call this method periodically to flush respect information to disk. More...
 
void GSF_connected_peer_init_ ()
 Initialize peer management subsystem. More...
 
void GSF_connected_peer_done_ ()
 Shutdown peer management subsystem. More...
 
static int clean_local_client (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
 Iterator to remove references to LC entry. More...
 
void GSF_handle_local_client_disconnect_ (const struct GSF_LocalClient *lc)
 Notification that a local client disconnected. More...
 

Variables

static struct GNUNET_CONTAINER_MultiPeerMapcp_map
 Map from peer identities to struct GSF_ConnectPeer entries. More...
 
static struct GNUNET_PEERSTORE_Handlepeerstore
 Handle to peerstore service. More...
 
static struct GNUNET_SCHEDULER_Taskfr_task
 Task used to flush respect values to disk. More...
 

Detailed Description

API to handle 'connected peers'.

Author
Christian Grothoff

Definition in file gnunet-service-fs_cp.c.

Macro Definition Documentation

◆ RUNAVG_DELAY_N

#define RUNAVG_DELAY_N   16

Ratio for moving average delay calculation.

The previous average goes in with a factor of (n-1) into the calculation. Must be > 0.

Definition at line 41 of file gnunet-service-fs_cp.c.

◆ RESPECT_FLUSH_FREQ

#define RESPECT_FLUSH_FREQ
Value:
#define GNUNET_TIME_UNIT_MINUTES
One minute.
struct GNUNET_TIME_Relative GNUNET_TIME_relative_multiply(struct GNUNET_TIME_Relative rel, unsigned long long factor)
Multiply relative time by a given factor.
Definition: time.c:484

How often do we flush respect values to disk?

Definition at line 46 of file gnunet-service-fs_cp.c.

◆ REPLY_TIMEOUT

#define REPLY_TIMEOUT
Value:

After how long do we discard a reply?

Definition at line 52 of file gnunet-service-fs_cp.c.

◆ INSANE_STATISTICS

#define INSANE_STATISTICS   GNUNET_NO

Collect an instance number of statistics? May cause excessive IPC.

Definition at line 58 of file gnunet-service-fs_cp.c.

◆ N

#define N   ((double) 128.0)

Function Documentation

◆ GSF_update_peer_latency_()

void GSF_update_peer_latency_ ( const struct GNUNET_PeerIdentity id,
struct GNUNET_TIME_Relative  latency 
)

Update the latency information kept for the given peer.

Parameters
idpeer record to update
latencycurrent latency value

Definition at line 286 of file gnunet-service-fs_cp.c.

288{
289 struct GSF_ConnectedPeer *cp;
290
291 cp = GSF_peer_get_ (id);
292 if (NULL == cp)
293 return; /* we're not yet connected at the core level, ignore */
295 latency);
296}
struct GSF_ConnectedPeer * GSF_peer_get_(const struct GNUNET_PeerIdentity *peer)
Get a handle for a connected peer.
void GNUNET_LOAD_value_set_decline(struct GNUNET_LOAD_Value *load, struct GNUNET_TIME_Relative autodecline)
Change the value by which the load automatically declines.
Definition: load.c:143
A connected peer.
struct GSF_PeerPerformanceData ppd
Performance data for this peer.
struct GNUNET_LOAD_Value * transmission_delay
How long does it typically take for us to transmit a message to this peer? (delay between the request...

References GNUNET_LOAD_value_set_decline(), GSF_peer_get_(), GSF_ConnectedPeer::ppd, and GSF_PeerPerformanceData::transmission_delay.

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◆ GSF_get_peer_performance_data_()

struct GSF_PeerPerformanceData * GSF_get_peer_performance_data_ ( struct GSF_ConnectedPeer cp)

Return the performance data record for the given peer.

Parameters
cppeer to query
Returns
performance data record for the peer

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

307{
308 return &cp->ppd;
309}

References GSF_ConnectedPeer::ppd.

Referenced by handle_p2p_put(), put_migration_continuation(), score_content(), and transmit_content().

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◆ peer_transmit()

static void peer_transmit ( struct GSF_ConnectedPeer cp)
static

Core is ready to transmit to a peer, get the message.

Parameters
cpwhich peer to send a message to

Definition at line 347 of file gnunet-service-fs_cp.c.

348{
349 struct GSF_PeerTransmitHandle *pth = cp->pth_head;
350 struct GSF_PeerTransmitHandle *pos;
351
352 if (NULL == pth)
353 return;
355 cp->pth_tail,
356 pth);
357 if (GNUNET_YES == pth->is_query)
358 {
363 }
364 else if (GNUNET_NO == pth->is_query)
365 {
367 }
372 pth->env);
373 GNUNET_free (pth);
374 if (NULL != (pos = cp->pth_head))
375 {
376 GNUNET_assert (pos != pth);
378 }
379}
static void schedule_transmission(struct GSF_PeerTransmitHandle *pth)
If ready (bandwidth reserved), try to schedule transmission via core for the given handle.
#define MAX_QUEUE_PER_PEER
Maximum number of outgoing messages we queue per peer.
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
@ GNUNET_YES
@ GNUNET_NO
void GNUNET_LOAD_update(struct GNUNET_LOAD_Value *load, uint64_t data)
Update the current load.
Definition: load.c:237
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_free(ptr)
Wrapper around free.
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:304
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:436
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:111
uint64_t rel_value_us
The actual value.
struct GSF_PeerTransmitHandle * pth_head
Messages (replies, queries, content migration) we would like to send to this peer in the near future.
struct GNUNET_MQ_Handle * mq
Handle for an active request for transmission to this peer.
unsigned int last_request_times_off
Current offset into last_request_times ring buffer.
struct GSF_PeerTransmitHandle * pth_tail
Messages (replies, queries, content migration) we would like to send to this peer in the near future.
unsigned int pending_replies
Number of pending replies (queries are not counted)
unsigned int pending_queries
Number of pending queries (replies are not counted)
struct GNUNET_TIME_Absolute last_request_times[24]
Transmission times for the last MAX_QUEUE_PER_PEER requests for this peer.
Handle to cancel a transmission request.
int is_query
GNUNET_YES if this is a query, GNUNET_NO for content.
struct GNUNET_TIME_Absolute transmission_request_start_time
Time when this transmission request was issued.
struct GSF_ConnectedPeer * cp
Peer this request targets.
struct GNUNET_MQ_Envelope * env
Envelope with the actual message.

References GSF_PeerTransmitHandle::cp, GSF_PeerTransmitHandle::env, GNUNET_assert, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_LOAD_update(), GNUNET_MQ_send(), GNUNET_NO, GNUNET_TIME_absolute_get(), GNUNET_TIME_absolute_get_duration(), GNUNET_YES, GSF_PeerTransmitHandle::is_query, GSF_PeerPerformanceData::last_request_times, GSF_ConnectedPeer::last_request_times_off, MAX_QUEUE_PER_PEER, GSF_ConnectedPeer::mq, GSF_PeerPerformanceData::pending_queries, GSF_PeerPerformanceData::pending_replies, GSF_ConnectedPeer::ppd, GSF_ConnectedPeer::pth_head, GSF_ConnectedPeer::pth_tail, GNUNET_TIME_Relative::rel_value_us, schedule_transmission(), GSF_PeerPerformanceData::transmission_delay, and GSF_PeerTransmitHandle::transmission_request_start_time.

Referenced by schedule_transmission().

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◆ schedule_transmission()

static void schedule_transmission ( struct GSF_PeerTransmitHandle pth)
static

If ready (bandwidth reserved), try to schedule transmission via core for the given handle.

Parameters
pthtransmission handle to schedule

Definition at line 328 of file gnunet-service-fs_cp.c.

329{
330 struct GSF_ConnectedPeer *cp;
331 struct GNUNET_PeerIdentity target;
332
333 cp = pth->cp;
334 GNUNET_assert (0 != cp->ppd.pid);
335 GNUNET_PEER_resolve (cp->ppd.pid, &target);
336
337 peer_transmit (cp);
338}
static void peer_transmit(struct GSF_ConnectedPeer *cp)
Core is ready to transmit to a peer, get the message.
void GNUNET_PEER_resolve(GNUNET_PEER_Id id, struct GNUNET_PeerIdentity *pid)
Convert an interned PID to a normal peer identity.
Definition: peer.c:220
The identity of the host (wraps the signing key of the peer).
GNUNET_PEER_Id pid
The peer's identity (interned version).

References GSF_PeerTransmitHandle::cp, GNUNET_assert, GNUNET_PEER_resolve(), peer_transmit(), GSF_PeerPerformanceData::pid, and GSF_ConnectedPeer::ppd.

Referenced by GSF_peer_transmit_(), and peer_transmit().

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◆ peer_respect_cb()

static void peer_respect_cb ( void *  cls,
const struct GNUNET_PEERSTORE_Record record,
const char *  emsg 
)
static

Function called by PEERSTORE with peer respect record.

Parameters
clshandle to connected peer entry
recordpeerstore record information
emsgerror message, or NULL if no errors

Definition at line 390 of file gnunet-service-fs_cp.c.

393{
394 struct GSF_ConnectedPeer *cp = cls;
395
397 if ((NULL == record) && (NULL == emsg))
398 {
399 cp->respect_iterate_req = NULL;
400 return;
401 }
402 if ((NULL != record) &&
403 (sizeof(cp->disk_respect) == record->value_size))
404 {
405 cp->disk_respect = *((uint32_t *) record->value);
406 cp->ppd.respect += *((uint32_t *) record->value);
407 }
408 GSF_push_start_ (cp);
409 if (NULL != record)
410 {
412 cp->respect_iterate_req = NULL;
413 return;
414 }
416}
static void record(void *cls, size_t data_size, const void *data)
Process recorded audio data.
void GSF_push_start_(struct GSF_ConnectedPeer *peer)
A peer connected to us.
void GNUNET_PEERSTORE_iteration_next(struct GNUNET_PEERSTORE_IterateContext *ic, uint64_t limit)
Continue an iteration.
void GNUNET_PEERSTORE_iteration_stop(struct GNUNET_PEERSTORE_IterateContext *ic)
Cancel an iteration.
struct GNUNET_PEERSTORE_IterateContext * respect_iterate_req
Handle to the PEERSTORE iterate request for peer respect value.
uint32_t disk_respect
Respect rating for this peer on disk.
uint32_t respect
Respect rating for this peer.

References GSF_ConnectedPeer::disk_respect, GNUNET_assert, GNUNET_PEERSTORE_iteration_next(), GNUNET_PEERSTORE_iteration_stop(), GSF_push_start_(), GSF_ConnectedPeer::ppd, record(), GSF_PeerPerformanceData::respect, and GSF_ConnectedPeer::respect_iterate_req.

Referenced by GSF_peer_connect_handler().

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◆ consider_peer_for_forwarding()

static int consider_peer_for_forwarding ( void *  cls,
const struct GNUNET_HashCode key,
struct GSF_PendingRequest pr 
)
static

Function called for each pending request whenever a new peer connects, giving us a chance to decide about submitting the existing request to the new peer.

Parameters
clsthe struct GSF_ConnectedPeer of the new peer
keyquery for the request
prhandle to the pending request
Returns
GNUNET_YES to continue to iterate

Definition at line 430 of file gnunet-service-fs_cp.c.

433{
434 struct GSF_ConnectedPeer *cp = cls;
436
437 if (GNUNET_YES !=
439 return GNUNET_YES; /* request is not actually active, skip! */
441 if (GNUNET_YES !=
443 {
445 gettext_noop ("# Loopback routes suppressed"),
446 1,
447 GNUNET_NO);
448 return GNUNET_YES;
449 }
450 GSF_plan_add_ (cp, pr);
451 return GNUNET_YES;
452}
#define gettext_noop(String)
Definition: gettext.h:70
struct GNUNET_STATISTICS_Handle * GSF_stats
Handle for reporting statistics.
void GSF_connected_peer_get_identity_(const struct GSF_ConnectedPeer *cp, struct GNUNET_PeerIdentity *id)
Obtain the identity of a connected peer.
void GSF_plan_add_(struct GSF_ConnectedPeer *cp, struct GSF_PendingRequest *pr)
Create a new query plan entry.
int GSF_pending_request_test_target_(struct GSF_PendingRequest *pr, const struct GNUNET_PeerIdentity *target)
Is the given target a legitimate peer for forwarding the given request?
int GSF_pending_request_test_active_(struct GSF_PendingRequest *pr)
Check if the given request is still active.
static struct GNUNET_PeerIdentity pid
Identity of the peer we transmit to / connect to.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.

References gettext_noop, GNUNET_NO, GNUNET_STATISTICS_update(), GNUNET_YES, GSF_connected_peer_get_identity_(), GSF_pending_request_test_active_(), GSF_pending_request_test_target_(), GSF_plan_add_(), GSF_stats, and pid.

Referenced by GSF_peer_connect_handler().

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◆ GSF_peer_connect_handler()

void * GSF_peer_connect_handler ( void *  cls,
const struct GNUNET_PeerIdentity peer,
struct GNUNET_MQ_Handle mq 
)

A peer connected to us.

Setup the connected peer records.

Parameters
clsNULL
peeridentity of peer that connected
mqmessage queue for talking to peer
Returns
internal handle for the peer

Definition at line 456 of file gnunet-service-fs_cp.c.

459{
460 struct GSF_ConnectedPeer *cp;
461
462 if (0 ==
464 peer))
465 return NULL;
467 "Connected to peer %s\n",
468 GNUNET_i2s (peer));
469 cp = GNUNET_new (struct GSF_ConnectedPeer);
470 cp->ppd.pid = GNUNET_PEER_intern (peer);
471 cp->ppd.peer = peer;
472 cp->mq = mq;
474
476 GNUNET_YES);
480 cp),
481 cp,
484 gettext_noop ("# peers connected"),
486 GNUNET_NO);
489 "fs",
490 peer,
491 "respect",
493 cp);
495 cp);
496 return cp;
497}
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
struct GNUNET_PeerIdentity GSF_my_id
Identity of this peer.
static struct GNUNET_PEERSTORE_Handle * peerstore
Handle to peerstore service.
static void peer_respect_cb(void *cls, const struct GNUNET_PEERSTORE_Record *record, const char *emsg)
Function called by PEERSTORE with peer respect record.
const struct GNUNET_PeerIdentity * GSF_connected_peer_get_identity2_(const struct GSF_ConnectedPeer *cp)
Obtain the identity of a connected peer.
static int consider_peer_for_forwarding(void *cls, const struct GNUNET_HashCode *key, struct GSF_PendingRequest *pr)
Function called for each pending request whenever a new peer connects, giving us a chance to decide a...
static struct GNUNET_CONTAINER_MultiPeerMap * cp_map
Map from peer identities to struct GSF_ConnectPeer entries.
void GSF_iterate_pending_requests_(GSF_PendingRequestIterator it, void *cls)
Iterate over all pending requests.
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
unsigned int GNUNET_CONTAINER_multipeermap_size(const struct GNUNET_CONTAINER_MultiPeerMap *map)
Get the number of key-value pairs in the 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_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
@ GNUNET_OK
struct GNUNET_LOAD_Value * GNUNET_LOAD_value_init(struct GNUNET_TIME_Relative autodecline)
Create a new load value.
Definition: load.c:125
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.
@ GNUNET_ERROR_TYPE_DEBUG
#define GNUNET_new(type)
Allocate a struct or union of the given type.
GNUNET_PEER_Id GNUNET_PEER_intern(const struct GNUNET_PeerIdentity *pid)
Intern an peer identity.
Definition: peer.c:108
struct GNUNET_PEERSTORE_IterateContext * GNUNET_PEERSTORE_iteration_start(struct GNUNET_PEERSTORE_Handle *h, const char *sub_system, const struct GNUNET_PeerIdentity *peer, const char *key, GNUNET_PEERSTORE_Processor callback, void *callback_cls)
Iterate over peerstore entries.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
#define GNUNET_TIME_UNIT_ZERO
Relative time zero.
struct GNUNET_CONTAINER_MultiHashMap * request_map
Active requests from this neighbour, map of query to struct PeerRequest.
const struct GNUNET_PeerIdentity * peer
The peer's identity (pointer).

References consider_peer_for_forwarding(), cp_map, gettext_noop, GNUNET_break, GNUNET_CONTAINER_multihashmap_create(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_put(), GNUNET_CONTAINER_multipeermap_size(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_LOAD_value_init(), GNUNET_log, GNUNET_memcmp, GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_PEER_intern(), GNUNET_PEERSTORE_iteration_start(), GNUNET_STATISTICS_set(), GNUNET_TIME_UNIT_ZERO, GNUNET_YES, GSF_connected_peer_get_identity2_(), GSF_iterate_pending_requests_(), GSF_my_id, GSF_stats, mq, GSF_ConnectedPeer::mq, GSF_PeerPerformanceData::peer, peer_respect_cb(), peerstore, GSF_PeerPerformanceData::pid, GSF_ConnectedPeer::ppd, GSF_ConnectedPeer::request_map, GSF_ConnectedPeer::respect_iterate_req, and GSF_PeerPerformanceData::transmission_delay.

Referenced by main_init().

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◆ revive_migration()

static void revive_migration ( void *  cls)
static

It may be time to re-start migrating content to this peer.

Check, and if so, restart migration.

Parameters
clsthe struct GSF_ConnectedPeer

Definition at line 507 of file gnunet-service-fs_cp.c.

508{
509 struct GSF_ConnectedPeer *cp = cls;
510 struct GNUNET_TIME_Relative bt;
511
512 cp->mig_revive_task = NULL;
514 if (0 != bt.rel_value_us)
515 {
516 /* still time left... */
517 cp->mig_revive_task =
519 return;
520 }
521 GSF_push_start_ (cp);
522}
static void revive_migration(void *cls)
It may be time to re-start migrating content to this peer.
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:1278
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_remaining(struct GNUNET_TIME_Absolute future)
Given a timestamp in the future, how much time remains until then?
Definition: time.c:405
Time for relative time used by GNUnet, in microseconds.
struct GNUNET_SCHEDULER_Task * mig_revive_task
Task scheduled to revive migration to this peer.
struct GNUNET_TIME_Absolute migration_blocked_until
Point in time until which this peer does not want us to migrate content to it.

References GNUNET_SCHEDULER_add_delayed(), GNUNET_TIME_absolute_get_remaining(), GSF_push_start_(), GSF_ConnectedPeer::mig_revive_task, GSF_PeerPerformanceData::migration_blocked_until, GSF_ConnectedPeer::ppd, GNUNET_TIME_Relative::rel_value_us, and revive_migration().

Referenced by handle_p2p_migration_stop(), and revive_migration().

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◆ GSF_peer_get_()

struct GSF_ConnectedPeer * GSF_peer_get_ ( const struct GNUNET_PeerIdentity peer)

Get a handle for a connected peer.

Parameters
peerpeer's identity
Returns
NULL if this peer is not currently connected

Definition at line 526 of file gnunet-service-fs_cp.c.

527{
528 if (NULL == cp_map)
529 return NULL;
531}
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.

References cp_map, and GNUNET_CONTAINER_multipeermap_get().

Referenced by GSF_update_peer_latency_(), handle_p2p_get(), and put_migration_continuation().

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◆ handle_p2p_migration_stop()

void handle_p2p_migration_stop ( void *  cls,
const struct MigrationStopMessage msm 
)

Handle P2P GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP message.

Parameters
clsclosure, the struct GSF_ConnectedPeer
msmthe actual message

Definition at line 541 of file gnunet-service-fs_cp.c.

543{
544 struct GSF_ConnectedPeer *cp = cls;
545 struct GNUNET_TIME_Relative bt;
546
548 gettext_noop ("# migration stop messages received"),
549 1, GNUNET_NO);
552 _ ("Migration of content to peer `%s' blocked for %s\n"),
553 GNUNET_i2s (cp->ppd.peer),
556 if ((NULL == cp->mig_revive_task) &&
557 (NULL == cp->respect_iterate_req))
558 {
559 GSF_push_stop_ (cp);
560 cp->mig_revive_task =
562 &revive_migration, cp);
563 }
564}
void GSF_push_stop_(struct GSF_ConnectedPeer *peer)
A peer disconnected from us.
@ GNUNET_ERROR_TYPE_INFO
struct GNUNET_TIME_Relative GNUNET_TIME_relative_ntoh(struct GNUNET_TIME_RelativeNBO a)
Convert relative time from network byte order.
Definition: time.c:628
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
struct GNUNET_TIME_Absolute GNUNET_TIME_relative_to_absolute(struct GNUNET_TIME_Relative rel)
Convert relative time to an absolute time in the future.
Definition: time.c:316
#define _(String)
GNU gettext support macro.
Definition: platform.h:178
struct GNUNET_TIME_RelativeNBO duration
How long should the block last?

References _, MigrationStopMessage::duration, gettext_noop, GNUNET_ERROR_TYPE_INFO, GNUNET_i2s(), GNUNET_log, GNUNET_NO, GNUNET_SCHEDULER_add_delayed(), GNUNET_STATISTICS_update(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_relative_ntoh(), GNUNET_TIME_relative_to_absolute(), GNUNET_YES, GSF_push_stop_(), GSF_stats, GSF_ConnectedPeer::mig_revive_task, GSF_PeerPerformanceData::migration_blocked_until, GSF_PeerPerformanceData::peer, GSF_ConnectedPeer::ppd, GSF_ConnectedPeer::respect_iterate_req, and revive_migration().

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◆ free_pending_request()

static void free_pending_request ( struct PeerRequest peerreq)
static

Free resources associated with the given peer request.

Parameters
peerreqrequest to free

Definition at line 573 of file gnunet-service-fs_cp.c.

574{
575 struct GSF_ConnectedPeer *cp = peerreq->cp;
576 struct GSF_PendingRequestData *prd;
577
578 prd = GSF_pending_request_get_data_ (peerreq->pr);
579 if (NULL != peerreq->kill_task)
580 {
582 peerreq->kill_task = NULL;
583 }
585 gettext_noop ("# P2P searches active"),
586 -1,
587 GNUNET_NO);
590 &prd->query,
591 peerreq));
592 GNUNET_free (peerreq);
593}
struct GSF_PendingRequestData * GSF_pending_request_get_data_(struct GSF_PendingRequest *pr)
Obtain the public data associated with a pending request.
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multihashmap_remove(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, const void *value)
Remove the given key-value pair from the map.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:981
Public data (in the sense of not encapsulated within 'gnunet-service-fs_pr', not in the sense of netw...
struct GNUNET_HashCode query
Primary query hash for this request.
struct GSF_ConnectedPeer * cp
Which specific peer issued this request?
struct GSF_PendingRequest * pr
Handle to generic request (generic: from peer or local client).
struct GNUNET_SCHEDULER_Task * kill_task
Task for asynchronous stopping of this request.

References PeerRequest::cp, gettext_noop, GNUNET_break, GNUNET_CONTAINER_multihashmap_remove(), GNUNET_free, GNUNET_NO, GNUNET_SCHEDULER_cancel(), GNUNET_STATISTICS_update(), GNUNET_YES, GSF_pending_request_get_data_(), GSF_stats, PeerRequest::kill_task, PeerRequest::pr, GSF_PendingRequestData::query, and GSF_ConnectedPeer::request_map.

Referenced by cancel_pending_request(), handle_p2p_reply(), and test_exist_cb().

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◆ cancel_pending_request()

static int cancel_pending_request ( void *  cls,
const struct GNUNET_HashCode query,
void *  value 
)
static

Cancel all requests associated with the peer.

Parameters
clsunused
queryhash code of the request
valuethe struct GSF_PendingRequest
Returns
GNUNET_YES (continue to iterate)

Definition at line 605 of file gnunet-service-fs_cp.c.

608{
609 struct PeerRequest *peerreq = value;
610 struct GSF_PendingRequest *pr = peerreq->pr;
611
612 free_pending_request (peerreq);
614 GNUNET_NO);
615 return GNUNET_OK;
616}
static char * value
Value of the record to add/remove.
static void free_pending_request(struct PeerRequest *peerreq)
Free resources associated with the given peer request.
void GSF_pending_request_cancel_(struct GSF_PendingRequest *pr, int full_cleanup)
Explicitly cancel a pending request.
An active request.
Information per peer and request.

References free_pending_request(), GNUNET_NO, GNUNET_OK, GSF_pending_request_cancel_(), PeerRequest::pr, and value.

Referenced by GSF_peer_disconnect_handler(), and peer_request_destroy().

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◆ peer_request_destroy()

static void peer_request_destroy ( void *  cls)
static

Free the given request.

Parameters
clsthe request to free

Definition at line 625 of file gnunet-service-fs_cp.c.

626{
627 struct PeerRequest *peerreq = cls;
628 struct GSF_PendingRequest *pr = peerreq->pr;
629 struct GSF_PendingRequestData *prd;
630
631 peerreq->kill_task = NULL;
634 &prd->query,
635 peerreq);
636}
static int cancel_pending_request(void *cls, const struct GNUNET_HashCode *query, void *value)
Cancel all requests associated with the peer.

References cancel_pending_request(), GSF_pending_request_get_data_(), PeerRequest::kill_task, PeerRequest::pr, and GSF_PendingRequestData::query.

Referenced by handle_p2p_reply().

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◆ transmit_delayed_now()

static void transmit_delayed_now ( void *  cls)
static

The artificial delay is over, transmit the message now.

Parameters
clsthe struct GSF_DelayedHandle with the message

Definition at line 645 of file gnunet-service-fs_cp.c.

646{
647 struct GSF_DelayedHandle *dh = cls;
648 struct GSF_ConnectedPeer *cp = dh->cp;
649
651 cp->delayed_tail,
652 dh);
653 cp->delay_queue_size--;
655 GNUNET_NO,
656 UINT32_MAX,
657 dh->env);
658 GNUNET_free (dh);
659}
void GSF_peer_transmit_(struct GSF_ConnectedPeer *cp, int is_query, uint32_t priority, struct GNUNET_MQ_Envelope *env)
Transmit a message to the given peer as soon as possible.
struct GSF_DelayedHandle * delayed_tail
Messages (replies, queries, content migration) we would like to send to this peer in the near future.
unsigned int delay_queue_size
Number of entries in delayed_head DLL.
struct GSF_DelayedHandle * delayed_head
Messages (replies, queries, content migration) we would like to send to this peer in the near future.
Handle for an entry in our delay list.
struct GSF_ConnectedPeer * cp
Peer this transmission belongs to.
struct GNUNET_MQ_Envelope * env
Envelope of the message that was delayed.

References GSF_DelayedHandle::cp, GSF_ConnectedPeer::delay_queue_size, GSF_ConnectedPeer::delayed_head, GSF_ConnectedPeer::delayed_tail, GSF_DelayedHandle::env, GNUNET_CONTAINER_DLL_remove, GNUNET_free, GNUNET_NO, and GSF_peer_transmit_().

Referenced by handle_p2p_reply().

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◆ get_randomized_delay()

static struct GNUNET_TIME_Relative get_randomized_delay ( )
static

Get the randomized delay a response should be subjected to.

Returns
desired delay

Definition at line 668 of file gnunet-service-fs_cp.c.

669{
671
672 ret =
677#if INSANE_STATISTICS
680 ("# artificial delays introduced (ms)"),
681 ret.rel_value_us / 1000LL, GNUNET_NO);
682#endif
683 return ret;
684}
static int ret
Final status code.
Definition: gnunet-arm.c:94
struct GNUNET_TIME_Relative GSF_avg_latency
Running average of the observed latency to other peers (round trip).
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_TIME_UNIT_MILLISECONDS
One millisecond.

References gettext_noop, GNUNET_CRYPTO_QUALITY_WEAK, GNUNET_CRYPTO_random_u32(), GNUNET_NO, GNUNET_STATISTICS_update(), GNUNET_TIME_relative_multiply(), GNUNET_TIME_UNIT_MILLISECONDS, GSF_avg_latency, GSF_stats, GNUNET_TIME_Relative::rel_value_us, and ret.

Referenced by handle_p2p_reply().

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◆ handle_p2p_reply()

static void handle_p2p_reply ( void *  cls,
enum GNUNET_BLOCK_ReplyEvaluationResult  eval,
struct GSF_PendingRequest pr,
uint32_t  reply_anonymity_level,
struct GNUNET_TIME_Absolute  expiration,
struct GNUNET_TIME_Absolute  last_transmission,
enum GNUNET_BLOCK_Type  type,
const void *  data,
size_t  data_len 
)
static

Handle a reply to a pending request.

Also called if a request expires (then with data == NULL). The handler may be called many times (depending on the request type), but will not be called during or after a call to GSF_pending_request_cancel and will also not be called anymore after a call signalling expiration.

Parameters
clsstruct PeerRequest this is an answer for
evalevaluation of the result
prhandle to the original pending request
reply_anonymity_levelanonymity level for the reply, UINT32_MAX for "unknown"
expirationwhen does data expire?
last_transmissionwhen did we last transmit a request for this block
typetype of the block
dataresponse data, NULL on request expiration
data_lennumber of bytes in data

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

715{
716 struct PeerRequest *peerreq = cls;
717 struct GSF_ConnectedPeer *cp = peerreq->cp;
718 struct GSF_PendingRequestData *prd;
719 struct GNUNET_MQ_Envelope *env;
720 struct PutMessage *pm;
721 size_t msize;
722
723 GNUNET_assert (data_len + sizeof(struct PutMessage) <
725 GNUNET_assert (peerreq->pr == pr);
727 if (NULL == data)
728 {
729 free_pending_request (peerreq);
730 return;
731 }
733 if ( (prd->type != type) &&
734 (GNUNET_BLOCK_TYPE_ANY != prd->type) )
735 {
737 "# replies dropped due to type mismatch",
738 1, GNUNET_NO);
739 return;
740 }
742 "Transmitting result for query `%s' to peer\n",
743 GNUNET_h2s (&prd->query));
745 "# replies received for other peers",
746 1,
747 GNUNET_NO);
748 msize = sizeof(struct PutMessage) + data_len;
749 if (msize >= GNUNET_MAX_MESSAGE_SIZE)
750 {
751 GNUNET_break (0);
752 return;
753 }
754 if ( (UINT32_MAX != reply_anonymity_level) &&
755 (reply_anonymity_level > 1) )
756 {
757 if (reply_anonymity_level - 1 > GSF_cover_content_count)
758 {
760 "# replies dropped due to insufficient cover traffic",
761 1, GNUNET_NO);
762 return;
763 }
764 GSF_cover_content_count -= (reply_anonymity_level - 1);
765 }
766
768 data_len,
770 pm->type = htonl (type);
772 GNUNET_memcpy (&pm[1],
773 data,
774 data_len);
775 if ((UINT32_MAX != reply_anonymity_level) &&
776 (0 != reply_anonymity_level) &&
778 {
779 struct GSF_DelayedHandle *dh;
780
781 dh = GNUNET_new (struct GSF_DelayedHandle);
782 dh->cp = cp;
783 dh->env = env;
784 dh->msize = msize;
787 dh);
789 dh->delay_task =
792 dh);
793 }
794 else
795 {
797 GNUNET_NO,
798 UINT32_MAX,
799 env);
800 }
801 if (GNUNET_BLOCK_REPLY_OK_LAST != eval)
802 return;
803 if (NULL == peerreq->kill_task)
804 {
806 "# P2P searches destroyed due to ultimate reply",
807 1,
808 GNUNET_NO);
809 peerreq->kill_task =
811 peerreq);
812 }
813}
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static char * data
The data to insert into the dht.
static struct GNUNET_TIME_Relative expiration
User supplied expiration value.
static uint32_t type
Type string converted to DNS type value.
int GSF_enable_randomized_delays
Are we introducing randomized delays for better anonymity?
unsigned int GSF_cover_content_count
How many content messages have we received 'recently' that have not yet been claimed as cover traffic...
static struct GNUNET_TIME_Relative get_randomized_delay()
Get the randomized delay a response should be subjected to.
static void transmit_delayed_now(void *cls)
The artificial delay is over, transmit the message now.
static void peer_request_destroy(void *cls)
Free the given request.
static struct GNUNET_TRANSPORT_PluginMonitor * pm
Handle if we are monitoring plugin session activity.
#define GNUNET_MAX_MESSAGE_SIZE
Largest supported message (to be precise, one byte more than the largest possible message,...
@ GNUNET_BLOCK_REPLY_OK_LAST
Last possible valid result.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#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:63
#define GNUNET_MESSAGE_TYPE_FS_PUT
P2P response with content or active migration of content.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1305
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:638
@ GNUNET_BLOCK_TYPE_ANY
Identifier for any block.
struct GNUNET_SCHEDULER_Task * delay_task
Task for the delay.
size_t msize
Size of the message.
enum GNUNET_BLOCK_Type type
Type of the requested block.
Response from FS service with a result for a previous FS search.
Definition: fs.h:330

References GSF_DelayedHandle::cp, PeerRequest::cp, data, GSF_ConnectedPeer::delay_queue_size, GSF_DelayedHandle::delay_task, GSF_ConnectedPeer::delayed_head, GSF_ConnectedPeer::delayed_tail, env, GSF_DelayedHandle::env, expiration, free_pending_request(), get_randomized_delay(), GNUNET_assert, GNUNET_BLOCK_REPLY_OK_LAST, GNUNET_BLOCK_TYPE_ANY, GNUNET_break, GNUNET_CONTAINER_DLL_insert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MAX_MESSAGE_SIZE, GNUNET_memcpy, GNUNET_MESSAGE_TYPE_FS_PUT, GNUNET_MQ_msg_extra, GNUNET_new, GNUNET_NO, GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_now(), GNUNET_STATISTICS_update(), GNUNET_TIME_absolute_hton(), GNUNET_YES, GSF_cover_content_count, GSF_enable_randomized_delays, GSF_peer_transmit_(), GSF_pending_request_get_data_(), GSF_stats, PeerRequest::kill_task, GSF_DelayedHandle::msize, peer_request_destroy(), pm, PeerRequest::pr, GSF_PendingRequestData::query, transmit_delayed_now(), type, and GSF_PendingRequestData::type.

Referenced by handle_p2p_get().

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◆ change_peer_respect()

static int change_peer_respect ( struct GSF_ConnectedPeer cp,
int  value 
)
static

Increase the peer's respect by a value.

Parameters
cpwhich peer to change the respect value on
valueis the int value by which the peer's credit is to be increased or decreased
Returns
the actual change in respect (positive or negative)

Definition at line 825 of file gnunet-service-fs_cp.c.

826{
827 if (0 == value)
828 return 0;
829 GNUNET_assert (NULL != cp);
830 if (value > 0)
831 {
832 if (cp->ppd.respect + value < cp->ppd.respect)
833 {
834 value = UINT32_MAX - cp->ppd.respect;
835 cp->ppd.respect = UINT32_MAX;
836 }
837 else
838 cp->ppd.respect += value;
839 }
840 else
841 {
842 if (cp->ppd.respect < -value)
843 {
844 value = -cp->ppd.respect;
845 cp->ppd.respect = 0;
846 }
847 else
848 cp->ppd.respect += value;
849 }
850 return value;
851}

References GSF_DelayedHandle::cp, GNUNET_assert, GSF_ConnectedPeer::ppd, GSF_PeerPerformanceData::respect, and value.

Referenced by bound_priority().

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◆ bound_priority()

static int32_t bound_priority ( uint32_t  prio_in,
struct GSF_ConnectedPeer cp 
)
static

We've received a request with the specified priority.

Bound it according to how much we respect the given peer.

Parameters
prio_inrequested priority
cpthe peer making the request
Returns
effective priority

Definition at line 863 of file gnunet-service-fs_cp.c.

865{
866#define N ((double) 128.0)
867 uint32_t ret;
868 double rret;
869 int ld;
870
872 if (GNUNET_SYSERR == ld)
873 {
874#if INSANE_STATISTICS
877 ("# requests done for free (low load)"), 1,
878 GNUNET_NO);
879#endif
880 return 0; /* excess resources */
881 }
882 if (prio_in > INT32_MAX)
883 prio_in = INT32_MAX;
884 ret = -change_peer_respect (cp, -(int) prio_in);
885 if (ret > 0)
886 {
888 rret = GSF_current_priorities + N;
889 else
890 rret = ret;
892 }
893 if ((GNUNET_YES == ld) && (ret > 0))
894 {
895 /* try with charging */
897 }
898 if (GNUNET_YES == ld)
899 {
902 ("# request dropped, priority insufficient"), 1,
903 GNUNET_NO);
904 /* undo charge */
905 change_peer_respect (cp, (int) ret);
906 return -1; /* not enough resources */
907 }
908 else
909 {
912 ("# requests done for a price (normal load)"),
913 1,
914 GNUNET_NO);
915 }
916#undef N
917 return ret;
918}
int GSF_test_get_load_too_high_(uint32_t priority)
Test if the DATABASE (GET) load on this peer is too high to even consider processing the query at all...
double GSF_current_priorities
Typical priorities we're seeing from other peers right now.
#define N
static int change_peer_respect(struct GSF_ConnectedPeer *cp, int value)
Increase the peer's respect by a value.
@ GNUNET_SYSERR

References change_peer_respect(), GSF_DelayedHandle::cp, gettext_noop, GNUNET_NO, GNUNET_STATISTICS_update(), GNUNET_SYSERR, GNUNET_YES, GSF_current_priorities, GSF_stats, GSF_test_get_load_too_high_(), N, and ret.

Referenced by handle_p2p_get().

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◆ bound_ttl()

static int32_t bound_ttl ( int32_t  ttl_in,
uint32_t  prio 
)
static

The priority level imposes a bound on the maximum value for the ttl that can be requested.

Parameters
ttl_inrequested ttl
priogiven priority
Returns
ttl_in if ttl_in is below the limit, otherwise the ttl-limit for the given prio

Definition at line 931 of file gnunet-service-fs_cp.c.

933{
934 unsigned long long allowed;
935
936 if (ttl_in <= 0)
937 return ttl_in;
938 allowed = ((unsigned long long) prio) * TTL_DECREMENT / 1000;
939 if (ttl_in > allowed)
940 {
941 if (allowed >= (1 << 30))
942 return 1 << 30;
943 return allowed;
944 }
945 return ttl_in;
946}
#define TTL_DECREMENT
By which amount do we decrement the TTL for simple forwarding / indirection of the query; in milli-se...

References TTL_DECREMENT.

Referenced by handle_p2p_get().

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◆ test_exist_cb()

static int test_exist_cb ( void *  cls,
const struct GNUNET_HashCode hc,
void *  value 
)
static

Test if the query already exists.

If so, merge it, otherwise keep finished at GNUNET_NO.

Parameters
clsour struct TestExistClosure
hcthe key of the query
valuethe existing struct PeerRequest.
Returns
GNUNET_YES to continue to iterate, GNUNET_NO if we successfully merged

Definition at line 987 of file gnunet-service-fs_cp.c.

990{
991 struct TestExistClosure *tec = cls;
992 struct PeerRequest *peerreq = value;
993 struct GSF_PendingRequest *pr;
994 struct GSF_PendingRequestData *prd;
995
996 pr = peerreq->pr;
998 if (prd->type != tec->type)
999 return GNUNET_YES;
1000 if (prd->ttl.abs_value_us >=
1001 GNUNET_TIME_absolute_get ().abs_value_us + tec->ttl * 1000LL)
1002 {
1003 /* existing request has higher TTL, drop new one! */
1004 prd->priority += tec->priority;
1006 "Have existing request with higher TTL, dropping new request.\n");
1009 ("# requests dropped due to higher-TTL request"),
1010 1, GNUNET_NO);
1011 tec->finished = GNUNET_YES;
1012 return GNUNET_NO;
1013 }
1014 /* existing request has lower TTL, drop old one! */
1015 tec->priority += prd->priority;
1016 free_pending_request (peerreq);
1018 GNUNET_YES);
1019 return GNUNET_NO;
1020}
uint64_t abs_value_us
The actual value.
struct GNUNET_TIME_Absolute ttl
Current TTL for the request.
uint32_t priority
Priority that this request (still) has for us.
Closure for test_exist_cb().
int finished
Set to GNUNET_YES if we are done handling the query.
int32_t ttl
Relative TTL of the incoming request.
int32_t priority
Priority of the incoming request.
enum GNUNET_BLOCK_Type type
Type of the incoming request.

References GNUNET_TIME_Absolute::abs_value_us, TestExistClosure::finished, free_pending_request(), gettext_noop, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_NO, GNUNET_STATISTICS_update(), GNUNET_TIME_absolute_get(), GNUNET_YES, GSF_pending_request_cancel_(), GSF_pending_request_get_data_(), GSF_stats, PeerRequest::pr, TestExistClosure::priority, GSF_PendingRequestData::priority, TestExistClosure::ttl, GSF_PendingRequestData::ttl, TestExistClosure::type, GSF_PendingRequestData::type, and value.

Referenced by handle_p2p_get().

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◆ handle_p2p_get()

void handle_p2p_get ( void *  cls,
const struct GetMessage gm 
)

Handle P2P "QUERY" message.

Creates the pending request entry and sets up all of the data structures to that we will process replies properly. Does not initiate forwarding or local database lookups.

Parameters
clsthe other peer involved (sender of the message)
gmthe GET message

Definition at line 1033 of file gnunet-service-fs_cp.c.

1035{
1036 struct GSF_ConnectedPeer *cps = cls;
1037 struct PeerRequest *peerreq;
1038 struct GSF_PendingRequest *pr;
1039 struct GSF_ConnectedPeer *cp;
1040 const struct GNUNET_PeerIdentity *target;
1042 uint16_t msize;
1043 unsigned int bits;
1044 const struct GNUNET_PeerIdentity *opt;
1045 uint32_t bm;
1046 size_t bfsize;
1047 uint32_t ttl_decrement;
1048 struct TestExistClosure tec;
1049 GNUNET_PEER_Id spid;
1050 const struct GSF_PendingRequestData *prd;
1051
1052 msize = ntohs (gm->header.size);
1053 tec.type = ntohl (gm->type);
1054 bm = ntohl (gm->hash_bitmap);
1055 bits = 0;
1056 while (bm > 0)
1057 {
1058 if (1 == (bm & 1))
1059 bits++;
1060 bm >>= 1;
1061 }
1062 opt = (const struct GNUNET_PeerIdentity *) &gm[1];
1063 bfsize = msize - sizeof(struct GetMessage) - bits * sizeof(struct
1067 ("# GET requests received (from other peers)"),
1068 1,
1069 GNUNET_NO);
1071 bm = ntohl (gm->hash_bitmap);
1072 bits = 0;
1073 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1074 cp = GSF_peer_get_ (&opt[bits++]);
1075 else
1076 cp = cps;
1077 if (NULL == cp)
1078 {
1079 if (0 != (bm & GET_MESSAGE_BIT_RETURN_TO))
1081 "Failed to find RETURN-TO peer `%s' in connection set. Dropping query.\n",
1082 GNUNET_i2s (&opt[bits - 1]));
1083
1084 else
1086 "Failed to find peer `%s' in connection set. Dropping query.\n",
1087 GNUNET_i2s (cps->ppd.peer));
1090 (
1091 "# requests dropped due to missing reverse route"),
1092 1,
1093 GNUNET_NO);
1094 return;
1095 }
1096 unsigned int queue_size = GNUNET_MQ_get_length (cp->mq);
1097 queue_size += cp->ppd.pending_replies + cp->delay_queue_size;
1098 if (queue_size > MAX_QUEUE_PER_PEER)
1099 {
1101 "Peer `%s' has too many replies queued already. Dropping query.\n",
1102 GNUNET_i2s (cps->ppd.peer));
1104 gettext_noop (
1105 "# requests dropped due to full reply queue"),
1106 1,
1107 GNUNET_NO);
1108 return;
1109 }
1110 /* note that we can really only check load here since otherwise
1111 * peers could find out that we are overloaded by not being
1112 * disconnected after sending us a malformed query... */
1113 tec.priority = bound_priority (ntohl (gm->priority),
1114 cps);
1115 if (tec.priority < 0)
1116 {
1118 "Dropping query from `%s', this peer is too busy.\n",
1119 GNUNET_i2s (cps->ppd.peer));
1120 return;
1121 }
1123 "Received request for `%s' of type %u from peer `%s' with flags %u\n",
1124 GNUNET_h2s (&gm->query),
1125 (unsigned int) tec.type,
1126 GNUNET_i2s (cps->ppd.peer),
1127 (unsigned int) bm);
1128 target =
1129 (0 !=
1130 (bm & GET_MESSAGE_BIT_TRANSMIT_TO)) ? (&opt[bits++]) : NULL;
1132 spid = 0;
1133 if ((GNUNET_LOAD_get_load (cp->ppd.transmission_delay) > 3 * (1
1134 + tec.priority))
1136 GNUNET_CONSTANTS_MAX_CORK_DELAY.rel_value_us * 2
1138 {
1139 /* don't have BW to send to peer, or would likely take longer than we have for it,
1140 * so at best indirect the query */
1141 tec.priority = 0;
1143 spid = GNUNET_PEER_intern (cps->ppd.peer);
1144 GNUNET_assert (0 != spid);
1145 }
1146 tec.ttl = bound_ttl (ntohl (gm->ttl),
1147 tec.priority);
1148 /* decrement ttl (always) */
1149 ttl_decrement =
1152 if ((tec.ttl < 0) &&
1153 (((int32_t) (tec.ttl - ttl_decrement)) > 0))
1154 {
1156 "Dropping query from `%s' due to TTL underflow (%d - %u).\n",
1157 GNUNET_i2s (cps->ppd.peer),
1158 tec.ttl,
1159 ttl_decrement);
1162 ("# requests dropped due TTL underflow"), 1,
1163 GNUNET_NO);
1164 /* integer underflow => drop (should be very rare)! */
1165 return;
1166 }
1167 tec.ttl -= ttl_decrement;
1168
1169 /* test if the request already exists */
1170 tec.finished = GNUNET_NO;
1172 &gm->query,
1174 &tec);
1175 if (GNUNET_YES == tec.finished)
1176 return; /* merged into existing request, we're done */
1177
1178 peerreq = GNUNET_new (struct PeerRequest);
1179 peerreq->cp = cp;
1181 tec.type,
1182 &gm->query,
1183 target,
1184 (bfsize > 0)
1185 ? (const char *) &opt[bits]
1186 : NULL,
1187 bfsize,
1188 1 /* anonymity */,
1189 (uint32_t) tec.priority,
1190 tec.ttl,
1191 spid,
1193 NULL, 0, /* replies_seen */
1195 peerreq);
1196 GNUNET_assert (NULL != pr);
1198 peerreq->pr = pr;
1201 &prd->query,
1202 peerreq,
1205 gettext_noop (
1206 "# P2P query messages received and processed"),
1207 1,
1208 GNUNET_NO);
1210 gettext_noop ("# P2P searches active"),
1211 1,
1212 GNUNET_NO);
1216 NULL);
1217}
struct GNUNET_GETOPT_CommandLineOption options[]
Definition: 002.c:5
unsigned int GSF_cover_query_count
How many query messages have we received 'recently' that have not yet been claimed as cover traffic?
void GSF_consider_forwarding(void *cls, struct GSF_PendingRequest *pr, enum GNUNET_BLOCK_ReplyEvaluationResult result)
Function to be called after we're done processing replies from the local lookup.
struct GNUNET_LOAD_Value * GSF_rt_entry_lifetime
How long do requests typically stay in the routing table?
#define GET_MESSAGE_BIT_TRANSMIT_TO
The peer identity of a peer that had claimed to have the content previously is included (can be used ...
#define GET_MESSAGE_BIT_RETURN_TO
The peer identity of a peer waiting for the reply is included (used if the response should be transmi...
static void handle_p2p_reply(void *cls, enum GNUNET_BLOCK_ReplyEvaluationResult eval, struct GSF_PendingRequest *pr, uint32_t reply_anonymity_level, struct GNUNET_TIME_Absolute expiration, struct GNUNET_TIME_Absolute last_transmission, enum GNUNET_BLOCK_Type type, const void *data, size_t data_len)
Handle a reply to a pending request.
static int test_exist_cb(void *cls, const struct GNUNET_HashCode *hc, void *value)
Test if the query already exists.
static int32_t bound_priority(uint32_t prio_in, struct GSF_ConnectedPeer *cp)
We've received a request with the specified priority.
static int32_t bound_ttl(int32_t ttl_in, uint32_t prio)
The priority level imposes a bound on the maximum value for the ttl that can be requested.
struct GSF_PendingRequest * GSF_pending_request_create_(enum GSF_PendingRequestOptions options, enum GNUNET_BLOCK_Type type, const struct GNUNET_HashCode *query, const struct GNUNET_PeerIdentity *target, const char *bf_data, size_t bf_size, uint32_t anonymity_level, uint32_t priority, int32_t ttl, GNUNET_PEER_Id sender_pid, GNUNET_PEER_Id origin_pid, const struct GNUNET_HashCode *replies_seen, unsigned int replies_seen_count, GSF_PendingRequestReplyHandler rh, void *rh_cls)
Create a new pending request.
void GSF_local_lookup_(struct GSF_PendingRequest *pr, GSF_LocalLookupContinuation cont, void *cont_cls)
Look up the request in the local datastore.
GSF_PendingRequestOptions
Options for pending requests (bits to be ORed).
@ GSF_PRO_DEFAULTS
No special options (P2P-default).
@ GSF_PRO_FORWARD_ONLY
Request must only be forwarded (no routing)
#define GNUNET_CONSTANTS_MAX_CORK_DELAY
How long do we delay messages to get larger packet sizes (CORKing)?
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multihashmap_get_multiple(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, GNUNET_CONTAINER_MultiHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map that match a particular key.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE
Allow multiple values with the same key.
double GNUNET_LOAD_get_average(struct GNUNET_LOAD_Value *load)
Get the average value given to update so far.
Definition: load.c:216
double GNUNET_LOAD_get_load(struct GNUNET_LOAD_Value *load)
Get the current load.
Definition: load.c:201
unsigned int GNUNET_MQ_get_length(struct GNUNET_MQ_Handle *mq)
Obtain the current length of the message queue.
Definition: mq.c:293
unsigned int GNUNET_PEER_Id
A GNUNET_PEER_Id is simply a shorter version of a "struct GNUNET_PeerIdentifier" that can be used ins...
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
int has_started
Has this request been started yet (local/p2p operations)? Or are we still constructing it?
Message to the datastore service asking about specific content.
Definition: datastore.h:141
uint32_t type
Desired content type.
Definition: datastore.h:150
struct GNUNET_MessageHeader header
Type is GNUNET_MESSAGE_TYPE_DATASTORE_GET.
Definition: datastore.h:145
uint32_t priority
How important is this request (network byte order)
struct GNUNET_HashCode query
Hashcodes of the file(s) we're looking for.
int32_t ttl
Relative time to live in MILLISECONDS (network byte order)
uint32_t hash_bitmap
Which of the optional hash codes are present at the end of the message? See GET_MESSAGE_BIT_xx consta...

References bound_priority(), bound_ttl(), PeerRequest::cp, GSF_ConnectedPeer::delay_queue_size, TestExistClosure::finished, GET_MESSAGE_BIT_RETURN_TO, GET_MESSAGE_BIT_TRANSMIT_TO, gettext_noop, GNUNET_assert, GNUNET_break, GNUNET_CONSTANTS_MAX_CORK_DELAY, GNUNET_CONTAINER_multihashmap_get_multiple(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE, GNUNET_CRYPTO_QUALITY_WEAK, GNUNET_CRYPTO_random_u32(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_i2s(), GNUNET_LOAD_get_average(), GNUNET_LOAD_get_load(), GNUNET_log, GNUNET_MQ_get_length(), GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_PEER_intern(), GNUNET_STATISTICS_update(), GNUNET_YES, GSF_consider_forwarding(), GSF_cover_query_count, GSF_local_lookup_(), GSF_peer_get_(), GSF_pending_request_create_(), GSF_pending_request_get_data_(), GSF_PRO_DEFAULTS, GSF_PRO_FORWARD_ONLY, GSF_rt_entry_lifetime, GSF_stats, handle_p2p_reply(), GSF_PendingRequestData::has_started, GetMessage::hash_bitmap, GetMessage::header, MAX_QUEUE_PER_PEER, GSF_ConnectedPeer::mq, options, GSF_PeerPerformanceData::peer, GSF_PeerPerformanceData::pending_replies, GSF_ConnectedPeer::ppd, PeerRequest::pr, GetMessage::priority, TestExistClosure::priority, GetMessage::query, GSF_PendingRequestData::query, GSF_ConnectedPeer::request_map, GNUNET_MessageHeader::size, test_exist_cb(), GSF_PeerPerformanceData::transmission_delay, GetMessage::ttl, TestExistClosure::ttl, TTL_DECREMENT, GetMessage::type, and TestExistClosure::type.

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◆ GSF_peer_transmit_()

void GSF_peer_transmit_ ( struct GSF_ConnectedPeer cp,
int  is_query,
uint32_t  priority,
struct GNUNET_MQ_Envelope env 
)

Transmit a message to the given peer as soon as possible.

If the peer disconnects before the transmission can happen, the callback is invoked with a NULL buffer.

Parameters
cptarget peer
is_queryis this a query (GNUNET_YES) or content (GNUNET_NO) or neither (GNUNET_SYSERR)
priorityhow important is this request?
envmessage to send

Definition at line 1231 of file gnunet-service-fs_cp.c.

1235{
1236 struct GSF_PeerTransmitHandle *pth;
1237 struct GSF_PeerTransmitHandle *pos;
1239
1240 pth = GNUNET_new (struct GSF_PeerTransmitHandle);
1242 pth->env = env;
1243 pth->is_query = is_query;
1244 pth->priority = priority;
1245 pth->cp = cp;
1246 /* insertion sort (by priority, descending) */
1247 prev = NULL;
1248 pos = cp->pth_head;
1249 while ((NULL != pos) && (pos->priority > priority))
1250 {
1251 prev = pos;
1252 pos = pos->next;
1253 }
1255 cp->pth_tail,
1256 prev,
1257 pth);
1258 if (GNUNET_YES == is_query)
1260 else if (GNUNET_NO == is_query)
1263}
#define GNUNET_CONTAINER_DLL_insert_after(head, tail, other, element)
Insert an element into a DLL after the given other element.
struct GSF_PeerTransmitHandle * next
Kept in a doubly-linked list.
uint32_t priority
Priority of this request.
struct GSF_PeerTransmitHandle * prev
Kept in a doubly-linked list.

References GSF_PeerTransmitHandle::cp, env, GSF_PeerTransmitHandle::env, GNUNET_CONTAINER_DLL_insert_after, GNUNET_new, GNUNET_NO, GNUNET_TIME_absolute_get(), GNUNET_YES, GSF_PeerTransmitHandle::is_query, GSF_PeerTransmitHandle::next, GSF_PeerPerformanceData::pending_queries, GSF_PeerPerformanceData::pending_replies, GSF_ConnectedPeer::ppd, GSF_PeerTransmitHandle::prev, GSF_PeerTransmitHandle::priority, GSF_ConnectedPeer::pth_head, GSF_ConnectedPeer::pth_tail, schedule_transmission(), and GSF_PeerTransmitHandle::transmission_request_start_time.

Referenced by GSF_block_peer_migration_(), handle_p2p_reply(), schedule_peer_transmission(), transmit_content(), and transmit_delayed_now().

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◆ GSF_peer_update_performance_()

void GSF_peer_update_performance_ ( struct GSF_ConnectedPeer cp,
struct GNUNET_TIME_Absolute  request_time,
uint32_t  request_priority 
)

Report on receiving a reply; update the performance record of the given peer.

Parameters
cpresponding peer (will be updated)
request_timetime at which the original query was transmitted
request_prioritypriority of the original request

Definition at line 1274 of file gnunet-service-fs_cp.c.

1277{
1278 struct GNUNET_TIME_Relative delay;
1279
1280 delay = GNUNET_TIME_absolute_get_duration (request_time);
1283 + delay.rel_value_us) / RUNAVG_DELAY_N;
1284 cp->ppd.avg_priority =
1285 (cp->ppd.avg_priority * (RUNAVG_DELAY_N - 1)
1286 + request_priority) / RUNAVG_DELAY_N;
1287}
#define RUNAVG_DELAY_N
Ratio for moving average delay calculation.
double avg_priority
Average priority of successful replies.
struct GNUNET_TIME_Relative avg_reply_delay
Average delay between sending the peer a request and getting a reply (only calculated over the reques...

References GSF_PeerPerformanceData::avg_priority, GSF_PeerPerformanceData::avg_reply_delay, GNUNET_TIME_absolute_get_duration(), GSF_ConnectedPeer::ppd, GNUNET_TIME_Relative::rel_value_us, and RUNAVG_DELAY_N.

Referenced by update_request_performance_data().

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◆ GSF_peer_update_responder_client_()

void GSF_peer_update_responder_client_ ( struct GSF_ConnectedPeer cp,
struct GSF_LocalClient initiator_client 
)

Report on receiving a reply in response to an initiating client.

Remember that this peer is good for this client.

Parameters
cpresponding peer (will be updated)
initiator_clientlocal client on responsible for query

Definition at line 1298 of file gnunet-service-fs_cp.c.

1300{
1302 % CS2P_SUCCESS_LIST_SIZE] = initiator_client;
1303}
#define CS2P_SUCCESS_LIST_SIZE
Length of the CS-2-P success tracker.
unsigned int last_client_replies_woff
Which offset in last_client_replies will be updated next? (we go round-robin).
struct GSF_LocalClient * last_client_replies[8]
List of the last clients for which this peer successfully answered a query.

References CS2P_SUCCESS_LIST_SIZE, GSF_PeerPerformanceData::last_client_replies, GSF_ConnectedPeer::last_client_replies_woff, and GSF_ConnectedPeer::ppd.

◆ GSF_peer_update_responder_peer_()

void GSF_peer_update_responder_peer_ ( struct GSF_ConnectedPeer cp,
const struct GSF_ConnectedPeer initiator_peer 
)

Report on receiving a reply in response to an initiating peer.

Remember that this peer is good for this initiating peer.

Parameters
cpresponding peer (will be updated)
initiator_peerother peer responsible for query

Definition at line 1314 of file gnunet-service-fs_cp.c.

1316{
1317 unsigned int woff;
1318
1321 cp->ppd.last_p2p_replies[woff] = initiator_peer->ppd.pid;
1322 GNUNET_PEER_change_rc (initiator_peer->ppd.pid, 1);
1324}
#define P2P_SUCCESS_LIST_SIZE
Length of the P2P success tracker.
void GNUNET_PEER_change_rc(GNUNET_PEER_Id id, int delta)
Change the reference counter of an interned PID.
Definition: peer.c:192
unsigned int last_p2p_replies_woff
Which offset in last_p2p_replies will be updated next? (we go round-robin).
GNUNET_PEER_Id last_p2p_replies[8]
List of the last PIDs for which this peer successfully answered a query; We use 0 to indicate no succ...

References GNUNET_PEER_change_rc(), GSF_PeerPerformanceData::last_p2p_replies, GSF_ConnectedPeer::last_p2p_replies_woff, P2P_SUCCESS_LIST_SIZE, GSF_PeerPerformanceData::pid, and GSF_ConnectedPeer::ppd.

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◆ flush_respect()

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

Write peer-respect information to a file - flush the buffer entry!

Parameters
clsunused
keypeer identity
valuethe struct GSF_ConnectedPeer to flush
Returns
GNUNET_OK to continue iteration

Definition at line 1336 of file gnunet-service-fs_cp.c.

1339{
1340 struct GSF_ConnectedPeer *cp = value;
1341 struct GNUNET_PeerIdentity pid;
1342
1343 if (cp->ppd.respect == cp->disk_respect)
1344 return GNUNET_OK; /* unchanged */
1345 GNUNET_assert (0 != cp->ppd.pid);
1347 GNUNET_PEERSTORE_store (peerstore, "fs", &pid, "respect", &cp->ppd.respect,
1348 sizeof(cp->ppd.respect),
1351 NULL,
1352 NULL);
1353 return GNUNET_OK;
1354}
struct GNUNET_PEERSTORE_StoreContext * GNUNET_PEERSTORE_store(struct GNUNET_PEERSTORE_Handle *h, const char *sub_system, const struct GNUNET_PeerIdentity *peer, const char *key, const void *value, size_t size, struct GNUNET_TIME_Absolute expiry, enum GNUNET_PEERSTORE_StoreOption options, GNUNET_PEERSTORE_Continuation cont, void *cont_cls)
Store a new entry in the PEERSTORE.
@ GNUNET_PEERSTORE_STOREOPTION_REPLACE
Delete any previous values for the given key before storing the given value.
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".

References GSF_ConnectedPeer::disk_respect, GNUNET_assert, GNUNET_OK, GNUNET_PEER_resolve(), GNUNET_PEERSTORE_store(), GNUNET_PEERSTORE_STOREOPTION_REPLACE, GNUNET_TIME_UNIT_FOREVER_ABS, peerstore, GSF_PeerPerformanceData::pid, pid, GSF_ConnectedPeer::ppd, GSF_PeerPerformanceData::respect, and value.

Referenced by cron_flush_respect(), GSF_connected_peer_done_(), and GSF_peer_disconnect_handler().

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◆ GSF_peer_disconnect_handler()

void GSF_peer_disconnect_handler ( void *  cls,
const struct GNUNET_PeerIdentity peer,
void *  internal_cls 
)

A peer disconnected from us.

Tear down the connected peer record.

Parameters
clsunused
peeridentity of peer that disconnected
internal_clsthe corresponding struct GSF_ConnectedPeer

Definition at line 1358 of file gnunet-service-fs_cp.c.

1361{
1362 struct GSF_ConnectedPeer *cp = internal_cls;
1363 struct GSF_PeerTransmitHandle *pth;
1364 struct GSF_DelayedHandle *dh;
1365
1366 if (NULL == cp)
1367 return; /* must have been disconnect from core with
1368 * 'peer' == my_id, ignore */
1369 flush_respect (NULL,
1370 peer,
1371 cp);
1374 peer,
1375 cp));
1377 gettext_noop ("# peers connected"),
1379 GNUNET_NO);
1380 if (NULL != cp->respect_iterate_req)
1381 {
1383 cp->respect_iterate_req = NULL;
1384 }
1387 cp);
1389 cp->request_map = NULL;
1394 memset (cp->ppd.last_p2p_replies,
1395 0,
1396 sizeof(cp->ppd.last_p2p_replies));
1398 while (NULL != (pth = cp->pth_head))
1399 {
1401 cp->pth_tail,
1402 pth);
1403 if (GNUNET_YES == pth->is_query)
1405 else if (GNUNET_NO == pth->is_query)
1407 GNUNET_free (pth);
1408 }
1409 while (NULL != (dh = cp->delayed_head))
1410 {
1413 dh);
1414 GNUNET_MQ_discard (dh->env);
1417 GNUNET_free (dh);
1418 }
1420 if (NULL != cp->mig_revive_task)
1421 {
1423 cp->mig_revive_task = NULL;
1424 }
1427 GNUNET_free (cp);
1428}
static int flush_respect(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Write peer-respect information to a file - flush the buffer entry!
void GSF_plan_notify_peer_disconnect_(const struct GSF_ConnectedPeer *cp)
Notify the plan about a peer being no longer available; destroy all entries associated with this peer...
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MultiHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
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_LOAD_value_free(lv)
Free a load value.
void GNUNET_MQ_discard(struct GNUNET_MQ_Envelope *mqm)
Discard the message queue message, free all allocated resources.
Definition: mq.c:285
void GNUNET_PEER_decrement_rcs(const GNUNET_PEER_Id *ids, unsigned int count)
Decrement multiple RCs of peer identities by one.
Definition: peer.c:157

References cancel_pending_request(), GSF_DelayedHandle::cp, cp_map, GSF_ConnectedPeer::delay_queue_size, GSF_DelayedHandle::delay_task, GSF_ConnectedPeer::delayed_head, GSF_ConnectedPeer::delayed_tail, GSF_DelayedHandle::env, flush_respect(), gettext_noop, GNUNET_assert, GNUNET_break, GNUNET_CONTAINER_DLL_remove, GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multipeermap_remove(), GNUNET_CONTAINER_multipeermap_size(), GNUNET_free, GNUNET_LOAD_value_free, GNUNET_MQ_discard(), GNUNET_NO, GNUNET_PEER_change_rc(), GNUNET_PEER_decrement_rcs(), GNUNET_PEERSTORE_iteration_stop(), GNUNET_SCHEDULER_cancel(), GNUNET_STATISTICS_set(), GNUNET_YES, GSF_plan_notify_peer_disconnect_(), GSF_push_stop_(), GSF_stats, GSF_PeerTransmitHandle::is_query, GSF_PeerPerformanceData::last_p2p_replies, GSF_ConnectedPeer::mig_revive_task, P2P_SUCCESS_LIST_SIZE, GSF_PeerPerformanceData::pending_queries, GSF_PeerPerformanceData::pending_replies, GSF_PeerPerformanceData::pid, GSF_ConnectedPeer::ppd, GSF_ConnectedPeer::pth_head, GSF_ConnectedPeer::pth_tail, GSF_ConnectedPeer::request_map, GSF_ConnectedPeer::respect_iterate_req, and GSF_PeerPerformanceData::transmission_delay.

Referenced by main_init().

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◆ call_iterator()

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

Function that calls the callback for each peer.

Parameters
clsthe struct IterationContext *
keyidentity of the peer
valuethe struct GSF_ConnectedPeer *
Returns
GNUNET_YES to continue iteration

Definition at line 1457 of file gnunet-service-fs_cp.c.

1460{
1461 struct IterationContext *ic = cls;
1462 struct GSF_ConnectedPeer *cp = value;
1463
1464 ic->it (ic->it_cls,
1465 key, cp,
1466 &cp->ppd);
1467 return GNUNET_YES;
1468}
struct GNUNET_HashCode key
The key used in the DHT.
Closure for call_iterator().
void * it_cls
Closure for it.
GSF_ConnectedPeerIterator it
Function to call on each entry.

References GNUNET_YES, IterationContext::it, IterationContext::it_cls, key, GSF_ConnectedPeer::ppd, and value.

Referenced by GSF_iterate_connected_peers_().

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◆ GSF_iterate_connected_peers_()

void GSF_iterate_connected_peers_ ( GSF_ConnectedPeerIterator  it,
void *  it_cls 
)

Iterate over all connected peers.

Parameters
itfunction to call for each peer
it_clsclosure for it

Definition at line 1472 of file gnunet-service-fs_cp.c.

1474{
1475 struct IterationContext ic;
1476
1477 ic.it = it;
1478 ic.it_cls = it_cls;
1481 &ic);
1482}
static int call_iterator(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Function that calls the callback for each peer.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.

References call_iterator(), cp_map, GNUNET_CONTAINER_multipeermap_iterate(), IterationContext::it, and IterationContext::it_cls.

Referenced by GSF_consider_forwarding().

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◆ GSF_connected_peer_get_identity_()

void GSF_connected_peer_get_identity_ ( const struct GSF_ConnectedPeer cp,
struct GNUNET_PeerIdentity id 
)

Obtain the identity of a connected peer.

Parameters
cppeer to get identity of
ididentity to set (written to)

Definition at line 1492 of file gnunet-service-fs_cp.c.

1494{
1495 GNUNET_assert (0 != cp->ppd.pid);
1496 GNUNET_PEER_resolve (cp->ppd.pid, id);
1497}

References GNUNET_assert, GNUNET_PEER_resolve(), GSF_PeerPerformanceData::pid, and GSF_ConnectedPeer::ppd.

Referenced by consider_peer_for_forwarding().

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◆ GSF_connected_peer_get_identity2_()

const struct GNUNET_PeerIdentity * GSF_connected_peer_get_identity2_ ( const struct GSF_ConnectedPeer cp)

Obtain the identity of a connected peer.

Parameters
cppeer to get identity of
Returns
reference to peer identity, valid until peer disconnects (!)

Definition at line 1507 of file gnunet-service-fs_cp.c.

1508{
1509 GNUNET_assert (0 != cp->ppd.pid);
1510 return GNUNET_PEER_resolve2 (cp->ppd.pid);
1511}
const struct GNUNET_PeerIdentity * GNUNET_PEER_resolve2(GNUNET_PEER_Id id)
Convert an interned PID to a normal peer identity.
Definition: peer.c:234

References GNUNET_assert, GNUNET_PEER_resolve2(), GSF_PeerPerformanceData::pid, and GSF_ConnectedPeer::ppd.

Referenced by GSF_peer_connect_handler(), GSF_plan_add_(), GSF_plan_notify_peer_disconnect_(), GSF_push_start_(), and process_migration_content().

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◆ GSF_block_peer_migration_()

void GSF_block_peer_migration_ ( struct GSF_ConnectedPeer cp,
struct GNUNET_TIME_Absolute  block_time 
)

Ask a peer to stop migrating data to us until the given point in time.

Parameters
cppeer to ask
block_timeuntil when to block

Definition at line 1522 of file gnunet-service-fs_cp.c.

1524{
1525 struct GNUNET_MQ_Envelope *env;
1526 struct MigrationStopMessage *msm;
1527
1528 if (cp->last_migration_block.abs_value_us > block_time.abs_value_us)
1529 {
1531 "Migration already blocked for another %s\n",
1534 (cp->
1535 last_migration_block), GNUNET_YES));
1536 return; /* already blocked */
1537 }
1538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Asking to stop migration for %s\n",
1541 GNUNET_YES));
1542 cp->last_migration_block = block_time;
1543 env = GNUNET_MQ_msg (msm,
1545 msm->reserved = htonl (0);
1546 msm->duration
1548 (cp->last_migration_block));
1550 gettext_noop ("# migration stop messages sent"),
1551 1,
1552 GNUNET_NO);
1555 UINT32_MAX,
1556 env);
1557}
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:78
#define GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP
Peer asks us to stop migrating content towards it for a while.
struct GNUNET_TIME_RelativeNBO GNUNET_TIME_relative_hton(struct GNUNET_TIME_Relative a)
Convert relative time to network byte order.
Definition: time.c:618
struct GNUNET_TIME_Absolute last_migration_block
Time until when we blocked this peer from migrating data to us.
Message send by a peer that wants to be excluded from migration for a while.
uint32_t reserved
Always zero.

References GNUNET_TIME_Absolute::abs_value_us, MigrationStopMessage::duration, env, gettext_noop, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP, GNUNET_MQ_msg, GNUNET_NO, GNUNET_STATISTICS_update(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_SYSERR, GNUNET_TIME_absolute_get_remaining(), GNUNET_TIME_relative_hton(), GNUNET_YES, GSF_peer_transmit_(), GSF_stats, GSF_ConnectedPeer::last_migration_block, and MigrationStopMessage::reserved.

Referenced by handle_p2p_put(), and put_migration_continuation().

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◆ GSF_connected_peer_change_preference_()

void GSF_connected_peer_change_preference_ ( struct GSF_ConnectedPeer cp,
uint64_t  pref 
)

Notify core about a preference we have for the given peer (to allocate more resources towards it).

The change will be communicated the next time we reserve bandwidth with core (not instantly).

Parameters
cppeer to reserve bandwidth from
prefpreference change

Definition at line 1570 of file gnunet-service-fs_cp.c.

1572{
1573 cp->inc_preference += pref;
1574}
uint64_t inc_preference
Increase in traffic preference still to be submitted to the core service for this peer.

References GSF_ConnectedPeer::inc_preference.

Referenced by handle_p2p_put().

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◆ cron_flush_respect()

static void cron_flush_respect ( void *  cls)
static

Call this method periodically to flush respect information to disk.

Parameters
clsclosure, not used

Definition at line 1583 of file gnunet-service-fs_cp.c.

1584{
1585 fr_task = NULL;
1588 NULL);
1592 NULL);
1593}
static void cron_flush_respect(void *cls)
Call this method periodically to flush respect information to disk.
#define RESPECT_FLUSH_FREQ
How often do we flush respect values to disk?
static struct GNUNET_SCHEDULER_Task * fr_task
Task used to flush respect values to disk.
@ GNUNET_SCHEDULER_PRIORITY_HIGH
Run with high priority (important requests).
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1208

References cp_map, cron_flush_respect(), flush_respect(), fr_task, GNUNET_CONTAINER_multipeermap_iterate(), GNUNET_SCHEDULER_add_delayed_with_priority(), GNUNET_SCHEDULER_PRIORITY_HIGH, and RESPECT_FLUSH_FREQ.

Referenced by cron_flush_respect(), and GSF_connected_peer_init_().

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◆ GSF_connected_peer_init_()

void GSF_connected_peer_init_ ( void  )

Initialize peer management subsystem.

Definition at line 1600 of file gnunet-service-fs_cp.c.

1601{
1605 &cron_flush_respect, NULL);
1606}
const struct GNUNET_CONFIGURATION_Handle * GSF_cfg
Our configuration.
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).
struct GNUNET_PEERSTORE_Handle * GNUNET_PEERSTORE_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the PEERSTORE service.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_with_priority(enum GNUNET_SCHEDULER_Priority prio, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified priority.
Definition: scheduler.c:1232

References cp_map, cron_flush_respect(), fr_task, GNUNET_CONTAINER_multipeermap_create(), GNUNET_PEERSTORE_connect(), GNUNET_SCHEDULER_add_with_priority(), GNUNET_SCHEDULER_PRIORITY_HIGH, GNUNET_YES, GSF_cfg, and peerstore.

Referenced by run().

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◆ GSF_connected_peer_done_()

void GSF_connected_peer_done_ ( void  )

Shutdown peer management subsystem.

Definition at line 1613 of file gnunet-service-fs_cp.c.

1614{
1617 NULL);
1619 fr_task = NULL;
1621 cp_map = NULL;
1623}
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
void GNUNET_PEERSTORE_disconnect(struct GNUNET_PEERSTORE_Handle *h)
Disconnect from the PEERSTORE service.

References cp_map, flush_respect(), fr_task, GNUNET_CONTAINER_multipeermap_destroy(), GNUNET_CONTAINER_multipeermap_iterate(), GNUNET_PEERSTORE_disconnect(), GNUNET_SCHEDULER_cancel(), and peerstore.

Referenced by shutdown_task().

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◆ clean_local_client()

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

Iterator to remove references to LC entry.

Parameters
clsthe struct GSF_LocalClient * to look for
keycurrent key code
valuevalue in the hash map (peer entry)
Returns
GNUNET_YES (we should continue to iterate)

Definition at line 1635 of file gnunet-service-fs_cp.c.

1638{
1639 const struct GSF_LocalClient *lc = cls;
1640 struct GSF_ConnectedPeer *cp = value;
1641 unsigned int i;
1642
1643 for (i = 0; i < CS2P_SUCCESS_LIST_SIZE; i++)
1644 if (cp->ppd.last_client_replies[i] == lc)
1645 cp->ppd.last_client_replies[i] = NULL;
1646 return GNUNET_YES;
1647}
A local client.

References CS2P_SUCCESS_LIST_SIZE, GNUNET_YES, GSF_PeerPerformanceData::last_client_replies, GSF_ConnectedPeer::ppd, and value.

Referenced by GSF_handle_local_client_disconnect_().

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◆ GSF_handle_local_client_disconnect_()

void GSF_handle_local_client_disconnect_ ( const struct GSF_LocalClient lc)

Notification that a local client disconnected.

Clean up all of our references to the given handle.

Parameters
lchandle to the local client (henceforth invalid)

Definition at line 1657 of file gnunet-service-fs_cp.c.

1658{
1659 if (NULL == cp_map)
1660 return; /* already cleaned up */
1663 (void *) lc);
1664}
static int clean_local_client(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Iterator to remove references to LC entry.

References clean_local_client(), cp_map, and GNUNET_CONTAINER_multipeermap_iterate().

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Variable Documentation

◆ cp_map

◆ peerstore

struct GNUNET_PEERSTORE_Handle* peerstore
static

Handle to peerstore service.

Definition at line 271 of file gnunet-service-fs_cp.c.

Referenced by flush_respect(), GSF_connected_peer_done_(), GSF_connected_peer_init_(), and GSF_peer_connect_handler().

◆ fr_task

struct GNUNET_SCHEDULER_Task* fr_task
static

Task used to flush respect values to disk.

Definition at line 276 of file gnunet-service-fs_cp.c.

Referenced by cron_flush_respect(), GSF_connected_peer_done_(), and GSF_connected_peer_init_().