GNUnet  0.10.x
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gnunet-service-cadet_core.c File Reference

cadet service; interaction with CORE service More...

#include "platform.h"
#include "gnunet-service-cadet_core.h"
#include "gnunet-service-cadet_paths.h"
#include "gnunet-service-cadet_peer.h"
#include "gnunet-service-cadet_connection.h"
#include "gnunet-service-cadet_tunnels.h"
#include "gnunet_core_service.h"
#include "gnunet_statistics_service.h"
#include "cadet_protocol.h"
Include dependency graph for gnunet-service-cadet_core.c:

Go to the source code of this file.

Data Structures

struct  Rung
 Set of CadetRoutes that have exactly the same number of messages in their buffer. More...
 
struct  RouteDirection
 Information we keep per direction for a route. More...
 
struct  CadetRoute
 Description of a segment of a struct CadetConnection at the intermediate peers. More...
 

Macros

#define LOG(level, ...)   GNUNET_log_from(level, "cadet-cor", __VA_ARGS__)
 

Functions

static struct CadetRouteget_route (const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
 Get the route corresponding to a hash. More...
 
static void lower_rung (struct RouteDirection *dir)
 Lower the rung in which dir is by 1. More...
 
static void discard_buffer (struct RouteDirection *dir, struct GNUNET_MQ_Envelope *env)
 Discard the buffer env from the route direction dir and move dir down a rung. More...
 
static void discard_all_from_rung_tail ()
 Discard all messages from the highest rung, to make space. More...
 
static void route_message (struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
 We message msg from prev. More...
 
static int check_connection_create (void *cls, const struct GNUNET_CADET_ConnectionCreateMessage *msg)
 Check if the create_connection message has the appropriate size. More...
 
static void destroy_direction (struct RouteDirection *dir)
 Free internal data of a route direction. More...
 
static void destroy_route (struct CadetRoute *route)
 Destroy our state for route. More...
 
static void send_broken (struct RouteDirection *target, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_PeerIdentity *peer1, const struct GNUNET_PeerIdentity *peer2)
 Send message that a route is broken between peer1 and peer2. More...
 
static void timeout_cb (void *cls)
 Function called to check if any routes have timed out, and if so, to clean them up. More...
 
static void dir_ready_cb (void *cls, int ready)
 Function called when the message queue to the previous hop becomes available/unavailable. More...
 
static void dir_init (struct RouteDirection *dir, struct CadetRoute *route, struct CadetPeer *hop)
 Initialize one of the directions of a route. More...
 
static void send_broken_without_mqm (struct CadetPeer *target, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_PeerIdentity *failure_at)
 We could not create the desired route. More...
 
static void handle_connection_create (void *cls, const struct GNUNET_CADET_ConnectionCreateMessage *msg)
 Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE. More...
 
static void handle_connection_create_ack (void *cls, const struct GNUNET_CADET_ConnectionCreateAckMessage *msg)
 Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK. More...
 
static void handle_connection_broken (void *cls, const struct GNUNET_CADET_ConnectionBrokenMessage *msg)
 Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN. More...
 
static void handle_connection_destroy (void *cls, const struct GNUNET_CADET_ConnectionDestroyMessage *msg)
 Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY. More...
 
static void handle_tunnel_kx (void *cls, const struct GNUNET_CADET_TunnelKeyExchangeMessage *msg)
 Handle for GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX. More...
 
static void handle_tunnel_kx_auth (void *cls, const struct GNUNET_CADET_TunnelKeyExchangeAuthMessage *msg)
 Handle for GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX_AUTH. More...
 
static int check_tunnel_encrypted (void *cls, const struct GNUNET_CADET_TunnelEncryptedMessage *msg)
 Check if the encrypted message has the appropriate size. More...
 
static void handle_tunnel_encrypted (void *cls, const struct GNUNET_CADET_TunnelEncryptedMessage *msg)
 Handle for GNUNET_MESSAGE_TYPE_CADET_TUNNEL_ENCRYPTED. More...
 
static void core_init_cb (void *cls, const struct GNUNET_PeerIdentity *my_identity)
 Function called after GNUNET_CORE_connect has succeeded (or failed for good). More...
 
static void * core_connect_cb (void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
 Method called whenever a given peer connects. More...
 
static void core_disconnect_cb (void *cls, const struct GNUNET_PeerIdentity *peer, void *peer_cls)
 Method called whenever a peer disconnects. More...
 
void GCO_init (const struct GNUNET_CONFIGURATION_Handle *c)
 Initialize the CORE subsystem. More...
 
void GCO_shutdown ()
 Shut down the CORE subsystem. More...
 

Variables

static struct GNUNET_CORE_Handlecore
 Handle to the CORE service. More...
 
static struct GNUNET_CONTAINER_MultiShortmaproutes
 Routes on which this peer is an intermediate. More...
 
static struct GNUNET_CONTAINER_Heaproute_heap
 Heap of routes, MIN-sorted by last activity. More...
 
static struct Rung rung_zero
 Rung zero (always pointed to by rung_head). More...
 
static struct Rungrung_head = &rung_zero
 DLL of rungs, with the head always point to a rung of route directions with no messages in the queue. More...
 
static struct Rungrung_tail = &rung_zero
 Tail of the rung_head DLL. More...
 
static unsigned long long max_routes
 Maximum number of concurrent routes this peer will support. More...
 
static unsigned long long max_buffers
 Maximum number of envelopes we will buffer at this peer. More...
 
static unsigned long long cur_buffers
 Current number of envelopes we have buffered at this peer. More...
 
static struct GNUNET_SCHEDULER_Tasktimeout_task
 Task to timeout routes. More...
 

Detailed Description

cadet service; interaction with CORE service

Author
Bartlomiej Polot
Christian Grothoff

All functions in this file should use the prefix GCO (Gnunet Cadet cOre (bottom))

TODO:

Definition in file gnunet-service-cadet_core.c.

Macro Definition Documentation

◆ LOG

#define LOG (   level,
  ... 
)    GNUNET_log_from(level, "cadet-cor", __VA_ARGS__)

Function Documentation

◆ get_route()

static struct CadetRoute* get_route ( const struct GNUNET_CADET_ConnectionTunnelIdentifier cid)
static

Get the route corresponding to a hash.

Parameters
cidhash generated from the connection identifier

Definition at line 234 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, and GNUNET_CONTAINER_multishortmap_get().

Referenced by handle_connection_broken(), handle_connection_create(), handle_connection_destroy(), and route_message().

235 {
237  &cid->connection_of_tunnel);
238 }
void * GNUNET_CONTAINER_multishortmap_get(const struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key)
Given a key find a value in the map matching the key.
struct GNUNET_ShortHashCode connection_of_tunnel
static struct GNUNET_CONTAINER_MultiShortmap * routes
Routes on which this peer is an intermediate.
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◆ lower_rung()

static void lower_rung ( struct RouteDirection dir)
static

Lower the rung in which dir is by 1.

Parameters
dirdirection to lower in rung.

Definition at line 247 of file gnunet-service-cadet_core.c.

References GNUNET_assert, GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_DLL_insert_after, GNUNET_CONTAINER_DLL_remove, GNUNET_new, Rung::prev, Rung::rd_head, Rung::rd_tail, RouteDirection::rung, and Rung::rung_off.

Referenced by dir_ready_cb(), and discard_buffer().

248 {
249  struct Rung *rung = dir->rung;
250  struct Rung *prev;
251 
252  GNUNET_CONTAINER_DLL_remove(rung->rd_head, rung->rd_tail, dir);
253  prev = rung->prev;
254  GNUNET_assert(NULL != prev);
255  if (prev->rung_off != rung->rung_off - 1)
256  {
257  prev = GNUNET_new(struct Rung);
258  prev->rung_off = rung->rung_off - 1;
260  }
261  GNUNET_assert(NULL != prev);
262  GNUNET_CONTAINER_DLL_insert(prev->rd_head, prev->rd_tail, dir);
263  dir->rung = prev;
264 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
Set of CadetRoutes that have exactly the same number of messages in their buffer. ...
struct Rung * prev
Rung of RouteDirections with one less buffer entry each.
struct RouteDirection * rd_head
DLL of route directions with a number of buffer entries matching this rung.
static struct Rung * rung_head
DLL of rungs, with the head always point to a rung of route directions with no messages in the queue...
#define GNUNET_CONTAINER_DLL_insert_after(head, tail, other, element)
Insert an element into a DLL after the given other element.
struct RouteDirection * rd_tail
DLL of route directions with a number of buffer entries matching this rung.
unsigned int rung_off
Number of messages route directions at this rung have in their buffer.
struct Rung * rung
Rung of this route direction (matches length of the buffer DLL).
static struct Rung * rung_tail
Tail of the rung_head DLL.
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◆ discard_buffer()

static void discard_buffer ( struct RouteDirection dir,
struct GNUNET_MQ_Envelope env 
)
static

Discard the buffer env from the route direction dir and move dir down a rung.

Parameters
dirdirection that contains the env in the buffer
envenvelope to discard

Definition at line 275 of file gnunet-service-cadet_core.c.

References cur_buffers, RouteDirection::env_head, RouteDirection::env_tail, GNUNET_MQ_discard(), GNUNET_MQ_dll_remove(), GNUNET_NO, GNUNET_STATISTICS_set(), lower_rung(), and stats.

Referenced by destroy_direction(), discard_all_from_rung_tail(), and route_message().

276 {
277  GNUNET_MQ_dll_remove(&dir->env_head, &dir->env_tail, env);
278  cur_buffers--;
279  GNUNET_MQ_discard(env);
280  lower_rung(dir);
282 }
static struct GNUNET_STATISTICS_Handle * stats
Handle for statistics.
struct GNUNET_MQ_Envelope * env_head
Head of DLL of envelopes we have in the buffer for this direction.
static unsigned long long cur_buffers
Current number of envelopes we have buffered at this peer.
#define GNUNET_NO
Definition: gnunet_common.h:78
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
void GNUNET_MQ_dll_remove(struct GNUNET_MQ_Envelope **env_head, struct GNUNET_MQ_Envelope **env_tail, struct GNUNET_MQ_Envelope *env)
Remove env from the envelope DLL starting at env_head.
Definition: mq.c:1192
static void lower_rung(struct RouteDirection *dir)
Lower the rung in which dir is by 1.
void GNUNET_MQ_discard(struct GNUNET_MQ_Envelope *mqm)
Discard the message queue message, free all allocated resources.
Definition: mq.c:319
struct GNUNET_MQ_Envelope * env_tail
Tail of DLL of envelopes we have in the buffer for this direction.
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◆ discard_all_from_rung_tail()

static void discard_all_from_rung_tail ( )
static

Discard all messages from the highest rung, to make space.

Definition at line 289 of file gnunet-service-cadet_core.c.

References CadetRoute::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, dir, discard_buffer(), RouteDirection::env_head, GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_NO, GNUNET_sh2s(), GNUNET_STATISTICS_update(), LOG, RouteDirection::my_route, Rung::rd_head, rung_tail, stats, and tail.

Referenced by route_message().

290 {
291  struct Rung *tail = rung_tail;
292  struct RouteDirection *dir;
293 
294  while (NULL != (dir = tail->rd_head))
295  {
297  "Queue full due new message %s on connection %s, dropping old message\n",
300  "# messages dropped due to full buffer",
301  1,
302  GNUNET_NO);
303  discard_buffer(dir, dir->env_head);
304  }
306  GNUNET_free(tail);
307 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
static struct GNUNET_STATISTICS_Handle * stats
Handle for statistics.
static char * dir
Set to the directory where runtime files are stored.
Definition: gnunet-arm.c:84
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
struct GNUNET_MQ_Envelope * env_head
Head of DLL of envelopes we have in the buffer for this direction.
Information we keep per direction for a route.
#define LOG(level,...)
#define GNUNET_NO
Definition: gnunet_common.h:78
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Set of CadetRoutes that have exactly the same number of messages in their buffer. ...
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
Unique identifier for the connection that uses this route.
struct CadetRoute * my_route
Route this direction is part of.
struct RouteDirection * rd_head
DLL of route directions with a number of buffer entries matching this rung.
static struct Rung * rung_head
DLL of rungs, with the head always point to a rung of route directions with no messages in the queue...
static struct PendingResolutions * tail
Tail of list of pending resolution requests.
Definition: gnunet-ats.c:233
static void discard_buffer(struct RouteDirection *dir, struct GNUNET_MQ_Envelope *env)
Discard the buffer env from the route direction dir and move dir down a rung.
struct GNUNET_ShortHashCode connection_of_tunnel
static struct Rung * rung_tail
Tail of the rung_head DLL.
#define GNUNET_free(ptr)
Wrapper around free.
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◆ route_message()

static void route_message ( struct CadetPeer prev,
const struct GNUNET_CADET_ConnectionTunnelIdentifier cid,
const struct GNUNET_MessageHeader msg,
const enum GNUNET_MQ_PriorityPreferences  priority 
)
static

We message msg from prev.

Find its route by cid and forward to the next hop. Drop and signal broken route if we do not have a route.

Parameters
prevprevious hop (sender)
cidconnection identifier, tells us which route to use
msgthe message to forward

Definition at line 320 of file gnunet-service-cadet_core.c.

References GNUNET_TIME_Absolute::abs_value_us, GNUNET_CADET_ConnectionBrokenMessage::cid, CadetRoute::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, cur_buffers, dir, discard_all_from_rung_tail(), discard_buffer(), env, RouteDirection::env_head, RouteDirection::env_tail, GCP_2s(), GCP_get_id(), GCP_send(), GCP_send_ooo(), get_route(), GNUNET_CONTAINER_DLL_insert, GNUNET_CONTAINER_DLL_insert_after, GNUNET_CONTAINER_DLL_remove, GNUNET_CONTAINER_heap_update_cost(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_i2s(), GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN, GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY, GNUNET_MQ_dll_insert_head(), GNUNET_MQ_dll_insert_tail(), GNUNET_MQ_env_get_msg(), GNUNET_MQ_env_get_options(), GNUNET_MQ_env_next(), GNUNET_MQ_env_set_options(), GNUNET_MQ_msg, GNUNET_MQ_msg_copy(), GNUNET_MQ_PREF_LOW_LATENCY, GNUNET_MQ_PREF_OUT_OF_ORDER, GNUNET_MQ_PREF_UNRELIABLE, GNUNET_new, GNUNET_NO, GNUNET_sh2s(), GNUNET_STATISTICS_set(), GNUNET_STATISTICS_update(), GNUNET_TIME_absolute_get(), GNUNET_YES, CadetRoute::hn, RouteDirection::hop, RouteDirection::is_ready, CadetRoute::last_use, LOG, max_buffers, RouteDirection::mqm, my_full_id, RouteDirection::my_route, Rung::next, CadetRoute::next, GNUNET_CADET_ConnectionBrokenMessage::peer1, CadetRoute::prev, Rung::rd_head, Rung::rd_tail, RouteDirection::rung, Rung::rung_off, GNUNET_MessageHeader::size, stats, and GNUNET_MessageHeader::type.

Referenced by handle_connection_broken(), handle_connection_create(), handle_connection_create_ack(), handle_connection_destroy(), handle_tunnel_encrypted(), handle_tunnel_kx(), and handle_tunnel_kx_auth().

324 {
325  struct CadetRoute *route;
326  struct RouteDirection *dir;
327  struct Rung *rung;
328  struct Rung *nxt;
329  struct GNUNET_MQ_Envelope *env;
330 
331  route = get_route(cid);
332  if (NULL == route)
333  {
334  struct GNUNET_MQ_Envelope *env;
336 
338  "Failed to route message of type %u from %s on connection %s: no route\n",
339  ntohs(msg->type),
340  GCP_2s(prev),
342  switch (ntohs(msg->type))
343  {
346  /* No need to respond to these! */
347  return;
348  }
350  bm->cid = *cid;
351  bm->peer1 = my_full_id;
352  GCP_send_ooo(prev, env);
353  return;
354  }
357  dir = (prev == route->prev.hop) ? &route->next : &route->prev;
358  if (GNUNET_YES == dir->is_ready)
359  {
361  "Routing message of type %u from %s to %s on connection %s\n",
362  ntohs(msg->type),
363  GCP_2s(prev),
364  GNUNET_i2s(GCP_get_id(dir->hop)),
366  dir->is_ready = GNUNET_NO;
367  GCP_send(dir->mqm, GNUNET_MQ_msg_copy(msg));
368  return;
369  }
370  /* Check if low latency is required and if the previous message was
371  unreliable; if so, make sure we only queue one message per
372  direction (no buffering). */
373  if ((0 != (priority & GNUNET_MQ_PREF_LOW_LATENCY)) &&
374  (NULL != dir->env_head) &&
375  (0 ==
377  discard_buffer(dir, dir->env_head);
378  /* Check for duplicates */
379  for (const struct GNUNET_MQ_Envelope *env = dir->env_head; NULL != env;
380  env = GNUNET_MQ_env_next(env))
381  {
382  const struct GNUNET_MessageHeader *hdr = GNUNET_MQ_env_get_msg(env);
383 
384  if ((hdr->size == msg->size) && (0 == memcmp(hdr, msg, ntohs(msg->size))))
385  {
387  "Received duplicate of message already in buffer, dropping\n");
389  "# messages dropped due to duplicate in buffer",
390  1,
391  GNUNET_NO);
392  return;
393  }
394  }
395 
396  rung = dir->rung;
397  if (cur_buffers == max_buffers)
398  {
399  /* Need to make room. */
400  if (NULL != rung->next)
401  {
402  /* Easy case, drop messages from route directions in highest rung */
404  }
405  else
406  {
407  /* We are in the highest rung, drop our own! */
409  "Queue full due new message %s on connection %s, dropping old message\n",
412  "# messages dropped due to full buffer",
413  1,
414  GNUNET_NO);
415  discard_buffer(dir, dir->env_head);
416  rung = dir->rung;
417  }
418  }
419  /* remove 'dir' from current rung */
420  GNUNET_CONTAINER_DLL_remove(rung->rd_head, rung->rd_tail, dir);
421  /* make 'nxt' point to the next higher rung, create if necessary */
422  nxt = rung->next;
423  if ((NULL == nxt) || (rung->rung_off + 1 != nxt->rung_off))
424  {
425  nxt = GNUNET_new(struct Rung);
426  nxt->rung_off = rung->rung_off + 1;
428  }
429  /* insert 'dir' into next higher rung */
431  dir->rung = nxt;
432 
433  /* add message into 'dir' buffer */
435  "Queueing new message of type %u from %s to %s on connection %s\n",
436  ntohs(msg->type),
437  GCP_2s(prev),
438  GNUNET_i2s(GCP_get_id(dir->hop)),
440  env = GNUNET_MQ_msg_copy(msg);
441  GNUNET_MQ_env_set_options(env, priority);
442  if ((0 != (priority & GNUNET_MQ_PREF_LOW_LATENCY)) &&
443  (0 != (priority & GNUNET_MQ_PREF_OUT_OF_ORDER)) &&
444  (NULL != dir->env_head) &&
445  (0 == (GNUNET_MQ_env_get_options(dir->env_head) &
446  GNUNET_MQ_PREF_LOW_LATENCY)))
447  GNUNET_MQ_dll_insert_head(&dir->env_head, &dir->env_tail, env);
448  else
449  GNUNET_MQ_dll_insert_tail(&dir->env_head, &dir->env_tail, env);
450  cur_buffers++;
452  /* Clean up 'rung' if now empty (and not head) */
453  if ((NULL == rung->rd_head) && (rung != rung_head))
454  {
456  GNUNET_free(rung);
457  }
458 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
void GNUNET_MQ_dll_insert_tail(struct GNUNET_MQ_Envelope **env_head, struct GNUNET_MQ_Envelope **env_tail, struct GNUNET_MQ_Envelope *env)
Insert env into the envelope DLL starting at env_head Note that env must not be in any MQ while this ...
Definition: mq.c:1171
static struct GNUNET_STATISTICS_Handle * stats
Handle for statistics.
void GNUNET_MQ_dll_insert_head(struct GNUNET_MQ_Envelope **env_head, struct GNUNET_MQ_Envelope **env_tail, struct GNUNET_MQ_Envelope *env)
Insert env into the envelope DLL starting at env_head Note that env must not be in any MQ while this ...
Definition: mq.c:1150
static char * dir
Set to the directory where runtime files are stored.
Definition: gnunet-arm.c:84
static unsigned long long max_buffers
Maximum number of envelopes we will buffer at this peer.
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
void GNUNET_CONTAINER_heap_update_cost(struct GNUNET_CONTAINER_HeapNode *node, GNUNET_CONTAINER_HeapCostType new_cost)
Updates the cost of any node in the tree.
struct GNUNET_MQ_Envelope * GNUNET_MQ_msg_copy(const struct GNUNET_MessageHeader *hdr)
Create a new envelope by copying an existing message.
Definition: mq.c:651
struct GNUNET_MQ_Envelope * env_head
Head of DLL of envelopes we have in the buffer for this direction.
const struct GNUNET_MessageHeader * GNUNET_MQ_env_get_msg(const struct GNUNET_MQ_Envelope *env)
Obtain message contained in envelope.
Definition: mq.c:1077
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
Information we keep per direction for a route.
struct GNUNET_CONTAINER_HeapNode * hn
Position of this route in the route_heap.
#define LOG(level,...)
struct GNUNET_PeerIdentity my_full_id
Local peer own ID.
static unsigned long long cur_buffers
Current number of envelopes we have buffered at this peer.
void GNUNET_MQ_env_set_options(struct GNUNET_MQ_Envelope *env, enum GNUNET_MQ_PriorityPreferences pp)
Set application-specific options for this envelope.
Definition: mq.c:1002
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GCP_send(struct GCP_MessageQueueManager *mqm, struct GNUNET_MQ_Envelope *env)
Send the message in env to cp.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
Set of CadetRoutes that have exactly the same number of messages in their buffer. ...
uint64_t abs_value_us
The actual value.
const struct GNUNET_MQ_Envelope * GNUNET_MQ_env_next(const struct GNUNET_MQ_Envelope *env)
Return next envelope in queue.
Definition: mq.c:1090
struct Rung * next
Rung of RouteDirections with one more buffer entry each.
const char * GCP_2s(const struct CadetPeer *cp)
Get the static string for a peer ID.
Flag to indicate that low latency is important.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
Unique identifier for the connection that uses this route.
enum GNUNET_MQ_PriorityPreferences GNUNET_MQ_env_get_options(struct GNUNET_MQ_Envelope *env)
Get performance preferences set for this envelope.
Definition: mq.c:1017
struct CadetRoute * my_route
Route this direction is part of.
struct RouteDirection * rd_head
DLL of route directions with a number of buffer entries matching this rung.
uint16_t type
The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
static struct CadetRoute * get_route(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Get the route corresponding to a hash.
struct RouteDirection prev
Information about the previous hop on this route.
void GCP_send_ooo(struct CadetPeer *cp, struct GNUNET_MQ_Envelope *env)
Send the message in env to cp, overriding queueing logic.
Description of a segment of a struct CadetConnection at the intermediate peers.
struct CadetPeer * hop
Target peer.
struct GNUNET_TIME_Absolute last_use
When was this route last in use?
static struct Rung * rung_head
DLL of rungs, with the head always point to a rung of route directions with no messages in the queue...
#define GNUNET_CONTAINER_DLL_insert_after(head, tail, other, element)
Insert an element into a DLL after the given other element.
Message for notifying a disconnection in a path.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
struct RouteDirection next
Information about the next hop on this route.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:118
struct RouteDirection * rd_tail
DLL of route directions with a number of buffer entries matching this rung.
unsigned int rung_off
Number of messages route directions at this rung have in their buffer.
struct GNUNET_PeerIdentity peer1
ID of the endpoint.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GCP_MessageQueueManager * mqm
Message queue manager for hop.
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY
Request the destuction of a connection.
Flag to indicate that out-of-order delivery is OK.
struct Rung * rung
Rung of this route direction (matches length of the buffer DLL).
Header for all communications.
#define GNUNET_YES
Definition: gnunet_common.h:77
int is_ready
Is mqm currently ready for transmission?
Flag to indicate that unreliable delivery is acceptable.
static void discard_all_from_rung_tail()
Discard all messages from the highest rung, to make space.
static void discard_buffer(struct RouteDirection *dir, struct GNUNET_MQ_Envelope *env)
Discard the buffer env from the route direction dir and move dir down a rung.
struct GNUNET_ShortHashCode connection_of_tunnel
static struct Rung * rung_tail
Tail of the rung_head DLL.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN
Notify that a connection is no longer valid.
struct GNUNET_MQ_Envelope * env_tail
Tail of DLL of envelopes we have in the buffer for this direction.
#define GNUNET_free(ptr)
Wrapper around free.
const struct GNUNET_PeerIdentity * GCP_get_id(struct CadetPeer *cp)
Obtain the peer identity for a struct CadetPeer.
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◆ check_connection_create()

static int check_connection_create ( void *  cls,
const struct GNUNET_CADET_ConnectionCreateMessage msg 
)
static

Check if the create_connection message has the appropriate size.

Parameters
clsClosure (unused).
msgMessage to check.
Returns
GNUNET_YES if size is correct, GNUNET_NO otherwise.

Definition at line 470 of file gnunet-service-cadet_core.c.

References GNUNET_break_op, GNUNET_NO, GNUNET_YES, GNUNET_CADET_ConnectionCreateMessage::header, size, and GNUNET_MessageHeader::size.

472 {
473  uint16_t size = ntohs(msg->header.size) - sizeof(*msg);
474 
475  if (0 != (size % sizeof(struct GNUNET_PeerIdentity)))
476  {
477  GNUNET_break_op(0);
478  return GNUNET_NO;
479  }
480  return GNUNET_YES;
481 }
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE.
#define GNUNET_NO
Definition: gnunet_common.h:78
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
static unsigned int size
Size of the "table".
Definition: peer.c:66
The identity of the host (wraps the signing key of the peer).
#define GNUNET_YES
Definition: gnunet_common.h:77

◆ destroy_direction()

static void destroy_direction ( struct RouteDirection dir)
static

Free internal data of a route direction.

Parameters
dirdirection to destroy (do NOT free memory of 'dir' itself)

Definition at line 490 of file gnunet-service-cadet_core.c.

References discard_buffer(), env, RouteDirection::env_head, GCP_request_mq_cancel(), GNUNET_CONTAINER_DLL_remove, GNUNET_NO, GNUNET_STATISTICS_update(), RouteDirection::mqm, Rung::rd_head, Rung::rd_tail, and stats.

Referenced by destroy_route().

491 {
492  struct GNUNET_MQ_Envelope *env;
493 
494  while (NULL != (env = dir->env_head))
495  {
497  "# messages dropped due to route destruction",
498  1,
499  GNUNET_NO);
500  discard_buffer(dir, env);
501  }
502  if (NULL != dir->mqm)
503  {
504  GCP_request_mq_cancel(dir->mqm, NULL);
505  dir->mqm = NULL;
506  }
508 }
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
static struct GNUNET_STATISTICS_Handle * stats
Handle for statistics.
struct GNUNET_MQ_Envelope * env_head
Head of DLL of envelopes we have in the buffer for this direction.
#define GNUNET_NO
Definition: gnunet_common.h:78
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
struct RouteDirection * rd_head
DLL of route directions with a number of buffer entries matching this rung.
static struct Rung * rung_head
DLL of rungs, with the head always point to a rung of route directions with no messages in the queue...
struct RouteDirection * rd_tail
DLL of route directions with a number of buffer entries matching this rung.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GCP_MessageQueueManager * mqm
Message queue manager for hop.
void GCP_request_mq_cancel(struct GCP_MessageQueueManager *mqm, struct GNUNET_MQ_Envelope *last_env)
Stops message queue change notifications.
static void discard_buffer(struct RouteDirection *dir, struct GNUNET_MQ_Envelope *env)
Discard the buffer env from the route direction dir and move dir down a rung.
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◆ destroy_route()

static void destroy_route ( struct CadetRoute route)
static

Destroy our state for route.

Parameters
routeroute to destroy

Definition at line 517 of file gnunet-service-cadet_core.c.

References CadetRoute::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, destroy_direction(), GCP_get_id(), GNUNET_assert, GNUNET_CONTAINER_heap_remove_node(), GNUNET_CONTAINER_multishortmap_remove(), GNUNET_CONTAINER_multishortmap_size(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_i2s(), GNUNET_i2s2(), GNUNET_NO, GNUNET_sh2s(), GNUNET_STATISTICS_set(), GNUNET_YES, CadetRoute::hn, RouteDirection::hop, LOG, CadetRoute::next, CadetRoute::prev, and stats.

Referenced by dir_ready_cb(), handle_connection_broken(), handle_connection_destroy(), and timeout_cb().

518 {
520  "Destroying route from %s to %s of connection %s\n",
521  GNUNET_i2s(GCP_get_id(route->prev.hop)),
522  GNUNET_i2s2(GCP_get_id(route->next.hop)),
526  GNUNET_YES ==
528  &route->cid.connection_of_tunnel,
529  route));
531  "# routes",
533  GNUNET_NO);
534  destroy_direction(&route->prev);
535  destroy_direction(&route->next);
536  GNUNET_free(route);
537 }
static struct GNUNET_STATISTICS_Handle * stats
Handle for statistics.
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
const char * GNUNET_i2s2(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
unsigned int GNUNET_CONTAINER_multishortmap_size(const struct GNUNET_CONTAINER_MultiShortmap *map)
Get the number of key-value pairs in the map.
struct GNUNET_CONTAINER_HeapNode * hn
Position of this route in the route_heap.
#define LOG(level,...)
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int GNUNET_CONTAINER_multishortmap_remove(struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key, const void *value)
Remove the given key-value pair from the map.
#define GNUNET_NO
Definition: gnunet_common.h:78
static void destroy_direction(struct RouteDirection *dir)
Free internal data of a route direction.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
Unique identifier for the connection that uses this route.
struct RouteDirection prev
Information about the previous hop on this route.
struct CadetPeer * hop
Target peer.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
struct RouteDirection next
Information about the next hop on this route.
#define GNUNET_YES
Definition: gnunet_common.h:77
struct GNUNET_ShortHashCode connection_of_tunnel
void * GNUNET_CONTAINER_heap_remove_node(struct GNUNET_CONTAINER_HeapNode *node)
Removes a node from the heap.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_free(ptr)
Wrapper around free.
const struct GNUNET_PeerIdentity * GCP_get_id(struct CadetPeer *cp)
Obtain the peer identity for a struct CadetPeer.
static struct GNUNET_CONTAINER_MultiShortmap * routes
Routes on which this peer is an intermediate.
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◆ send_broken()

static void send_broken ( struct RouteDirection target,
const struct GNUNET_CADET_ConnectionTunnelIdentifier cid,
const struct GNUNET_PeerIdentity peer1,
const struct GNUNET_PeerIdentity peer2 
)
static

Send message that a route is broken between peer1 and peer2.

Parameters
targetwhere to send the message
cidconnection identifier to use
peer1one of the peers where a link is broken
peer2another one of the peers where a link is broken

Definition at line 549 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_ConnectionBrokenMessage::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, env, GCP_2s(), GCP_request_mq_cancel(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_i2s2(), GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN, GNUNET_MQ_msg, GNUNET_sh2s(), RouteDirection::hop, LOG, RouteDirection::mqm, GNUNET_CADET_ConnectionBrokenMessage::peer1, and GNUNET_CADET_ConnectionBrokenMessage::peer2.

Referenced by dir_ready_cb(), and timeout_cb().

553 {
554  struct GNUNET_MQ_Envelope *env;
556 
557  if (NULL == target->mqm)
558  return; /* Can't send notification, connection is down! */
560  "Notifying %s about BROKEN route at %s-%s of connection %s\n",
561  GCP_2s(target->hop),
562  GNUNET_i2s(peer1),
563  GNUNET_i2s2(peer2),
565 
567  bm->cid = *cid;
568  if (NULL != peer1)
569  bm->peer1 = *peer1;
570  if (NULL != peer2)
571  bm->peer2 = *peer2;
572  GCP_request_mq_cancel(target->mqm, env);
573  target->mqm = NULL;
574 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
const char * GNUNET_i2s2(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define LOG(level,...)
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
struct GNUNET_PeerIdentity peer2
ID of the endpoint.
const char * GCP_2s(const struct CadetPeer *cp)
Get the static string for a peer ID.
struct CadetPeer * hop
Target peer.
Message for notifying a disconnection in a path.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
struct GNUNET_PeerIdentity peer1
ID of the endpoint.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GCP_MessageQueueManager * mqm
Message queue manager for hop.
void GCP_request_mq_cancel(struct GCP_MessageQueueManager *mqm, struct GNUNET_MQ_Envelope *last_env)
Stops message queue change notifications.
struct GNUNET_ShortHashCode connection_of_tunnel
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN
Notify that a connection is no longer valid.
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◆ timeout_cb()

static void timeout_cb ( void *  cls)
static

Function called to check if any routes have timed out, and if so, to clean them up.

Finally, schedules itself again at the earliest time where there might be more work.

Parameters
clsNULL

Definition at line 585 of file gnunet-service-cadet_core.c.

References CadetRoute::cid, destroy_route(), GNUNET_CONTAINER_heap_peek(), GNUNET_ERROR_TYPE_INFO, GNUNET_log, GNUNET_SCHEDULER_add_at(), GNUNET_STRINGS_absolute_time_to_string(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_TIME_absolute_add(), GNUNET_TIME_absolute_get_remaining(), GNUNET_TIME_relative_multiply(), GNUNET_YES, keepalive_period, CadetRoute::last_use, CadetRoute::next, CadetRoute::prev, and send_broken().

Referenced by handle_connection_create().

586 {
587  struct CadetRoute *r;
588  struct GNUNET_TIME_Relative linger;
589  struct GNUNET_TIME_Absolute exp;
590 
591  timeout_task = NULL;
593  while (NULL != (r = GNUNET_CONTAINER_heap_peek(route_heap)))
594  {
595  exp = GNUNET_TIME_absolute_add(r->last_use, linger);
596  if (0 != GNUNET_TIME_absolute_get_remaining(exp).rel_value_us)
597  {
598  /* Route not yet timed out, wait until it does. */
599  timeout_task = GNUNET_SCHEDULER_add_at(exp, &timeout_cb, NULL);
600  return;
601  }
603  "Sending BROKEN due to timeout (%s was last use, %s linger)\n",
606  send_broken(&r->prev, &r->cid, NULL, NULL);
607  send_broken(&r->next, &r->cid, NULL, NULL);
608  destroy_route(r);
609  }
610  /* No more routes left, so no need for a #timeout_task */
611 }
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_add(struct GNUNET_TIME_Absolute start, struct GNUNET_TIME_Relative duration)
Add a given relative duration to the given start time.
Definition: time.c:393
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
Unique identifier for the connection that uses this route.
static void destroy_route(struct CadetRoute *route)
Destroy our state for route.
struct RouteDirection prev
Information about the previous hop on this route.
void * GNUNET_CONTAINER_heap_peek(const struct GNUNET_CONTAINER_Heap *heap)
Get element stored at the root of heap.
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:686
Description of a segment of a struct CadetConnection at the intermediate peers.
struct GNUNET_TIME_Absolute last_use
When was this route last in use?
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:440
struct RouteDirection next
Information about the next hop on this route.
static void send_broken(struct RouteDirection *target, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_PeerIdentity *peer1, const struct GNUNET_PeerIdentity *peer2)
Send message that a route is broken between peer1 and peer2.
static struct GNUNET_CONTAINER_Heap * route_heap
Heap of routes, MIN-sorted by last activity.
static struct GNUNET_SCHEDULER_Task * timeout_task
Task to timeout routes.
#define GNUNET_log(kind,...)
struct GNUNET_TIME_Relative keepalive_period
How frequently do we send KEEPALIVE messages on idle connections?
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:331
Time for absolute times used by GNUnet, in microseconds.
#define GNUNET_YES
Definition: gnunet_common.h:77
static void timeout_cb(void *cls)
Function called to check if any routes have timed out, and if so, to clean them up.
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:741
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_at(struct GNUNET_TIME_Absolute at, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run at the specified time.
Definition: scheduler.c:1214
Time for relative time used by GNUnet, in microseconds.
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◆ dir_ready_cb()

static void dir_ready_cb ( void *  cls,
int  ready 
)
static

Function called when the message queue to the previous hop becomes available/unavailable.

We expect this function to be called immediately when we register, and then again later if the connection ever goes down.

Parameters
clsthe struct RouteDirection
availableGNUNET_YES if sending is now possible, GNUNET_NO if sending is no longer possible GNUNET_SYSERR if sending is no longer possible and the last envelope was discarded

Definition at line 627 of file gnunet-service-cadet_core.c.

References CadetRoute::cid, cur_buffers, destroy_route(), dir, env, RouteDirection::env_head, RouteDirection::env_tail, GCP_get_id(), GCP_send(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MQ_dll_remove(), GNUNET_NO, GNUNET_STATISTICS_set(), GNUNET_YES, RouteDirection::hop, RouteDirection::is_ready, lower_rung(), RouteDirection::mqm, my_full_id, RouteDirection::my_route, CadetRoute::next, CadetRoute::prev, send_broken(), and stats.

Referenced by dir_init().

628 {
629  struct RouteDirection *dir = cls;
630  struct CadetRoute *route = dir->my_route;
631  struct RouteDirection *odir;
632 
633  if (GNUNET_YES == ready)
634  {
635  struct GNUNET_MQ_Envelope *env;
636 
637  dir->is_ready = GNUNET_YES;
638  if (NULL != (env = dir->env_head))
639  {
640  GNUNET_MQ_dll_remove(&dir->env_head, &dir->env_tail, env);
641  cur_buffers--;
643  lower_rung(dir);
644  dir->is_ready = GNUNET_NO;
645  GCP_send(dir->mqm, env);
646  }
647  return;
648  }
649  odir = (dir == &route->next) ? &route->prev : &route->next;
650  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending BROKEN due to MQ going down\n");
651  send_broken(&route->next, &route->cid, GCP_get_id(odir->hop), &my_full_id);
652  destroy_route(route);
653 }
static struct GNUNET_STATISTICS_Handle * stats
Handle for statistics.
static char * dir
Set to the directory where runtime files are stored.
Definition: gnunet-arm.c:84
struct GNUNET_MQ_Envelope * env_head
Head of DLL of envelopes we have in the buffer for this direction.
Information we keep per direction for a route.
struct GNUNET_PeerIdentity my_full_id
Local peer own ID.
static unsigned long long cur_buffers
Current number of envelopes we have buffered at this peer.
#define GNUNET_NO
Definition: gnunet_common.h:78
void GCP_send(struct GCP_MessageQueueManager *mqm, struct GNUNET_MQ_Envelope *env)
Send the message in env to cp.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
Unique identifier for the connection that uses this route.
struct CadetRoute * my_route
Route this direction is part of.
static void destroy_route(struct CadetRoute *route)
Destroy our state for route.
struct RouteDirection prev
Information about the previous hop on this route.
Description of a segment of a struct CadetConnection at the intermediate peers.
struct CadetPeer * hop
Target peer.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
struct RouteDirection next
Information about the next hop on this route.
void GNUNET_MQ_dll_remove(struct GNUNET_MQ_Envelope **env_head, struct GNUNET_MQ_Envelope **env_tail, struct GNUNET_MQ_Envelope *env)
Remove env from the envelope DLL starting at env_head.
Definition: mq.c:1192
static void lower_rung(struct RouteDirection *dir)
Lower the rung in which dir is by 1.
static void send_broken(struct RouteDirection *target, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_PeerIdentity *peer1, const struct GNUNET_PeerIdentity *peer2)
Send message that a route is broken between peer1 and peer2.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
struct GCP_MessageQueueManager * mqm
Message queue manager for hop.
#define GNUNET_log(kind,...)
#define GNUNET_YES
Definition: gnunet_common.h:77
int is_ready
Is mqm currently ready for transmission?
struct GNUNET_MQ_Envelope * env_tail
Tail of DLL of envelopes we have in the buffer for this direction.
const struct GNUNET_PeerIdentity * GCP_get_id(struct CadetPeer *cp)
Obtain the peer identity for a struct CadetPeer.
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◆ dir_init()

static void dir_init ( struct RouteDirection dir,
struct CadetRoute route,
struct CadetPeer hop 
)
static

Initialize one of the directions of a route.

Parameters
routeroute the direction belongs to
dirdirection to initialize
hopnext hop on in the dir

Definition at line 664 of file gnunet-service-cadet_core.c.

References dir_ready_cb(), GCP_request_mq(), GNUNET_assert, GNUNET_CONTAINER_DLL_insert, GNUNET_YES, RouteDirection::hop, RouteDirection::is_ready, RouteDirection::mqm, RouteDirection::my_route, Rung::rd_head, Rung::rd_tail, RouteDirection::rung, and rung_head.

Referenced by handle_connection_create().

667 {
668  dir->hop = hop;
669  dir->my_route = route;
670  dir->mqm = GCP_request_mq(hop, &dir_ready_cb, dir);
672  dir->rung = rung_head;
674 }
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct CadetRoute * my_route
Route this direction is part of.
struct RouteDirection * rd_head
DLL of route directions with a number of buffer entries matching this rung.
struct CadetPeer * hop
Target peer.
static struct Rung * rung_head
DLL of rungs, with the head always point to a rung of route directions with no messages in the queue...
static void dir_ready_cb(void *cls, int ready)
Function called when the message queue to the previous hop becomes available/unavailable.
struct RouteDirection * rd_tail
DLL of route directions with a number of buffer entries matching this rung.
struct GCP_MessageQueueManager * mqm
Message queue manager for hop.
struct Rung * rung
Rung of this route direction (matches length of the buffer DLL).
#define GNUNET_YES
Definition: gnunet_common.h:77
int is_ready
Is mqm currently ready for transmission?
struct GCP_MessageQueueManager * GCP_request_mq(struct CadetPeer *cp, GCP_MessageQueueNotificationCallback cb, void *cb_cls)
Start message queue change notifications.
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◆ send_broken_without_mqm()

static void send_broken_without_mqm ( struct CadetPeer target,
const struct GNUNET_CADET_ConnectionTunnelIdentifier cid,
const struct GNUNET_PeerIdentity failure_at 
)
static

We could not create the desired route.

Send a GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN message to target.

Parameters
targetwho should receive the message
cididentifier of the connection/route that failed
failure_atneighbour with which we failed to route, or NULL.

Definition at line 688 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_ConnectionBrokenMessage::cid, env, GCP_send_ooo(), GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN, GNUNET_MQ_msg, my_full_id, GNUNET_CADET_ConnectionBrokenMessage::peer1, and GNUNET_CADET_ConnectionBrokenMessage::peer2.

Referenced by handle_connection_create().

692 {
693  struct GNUNET_MQ_Envelope *env;
695 
697  bm->cid = *cid;
698  bm->peer1 = my_full_id;
699  if (NULL != failure_at)
700  bm->peer2 = *failure_at;
701  GCP_send_ooo(target, env);
702 }
struct GNUNET_PeerIdentity my_full_id
Local peer own ID.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
struct GNUNET_PeerIdentity peer2
ID of the endpoint.
void GCP_send_ooo(struct CadetPeer *cp, struct GNUNET_MQ_Envelope *env)
Send the message in env to cp, overriding queueing logic.
Message for notifying a disconnection in a path.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
struct GNUNET_PeerIdentity peer1
ID of the endpoint.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN
Notify that a connection is no longer valid.
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Here is the caller graph for this function:

◆ handle_connection_create()

static void handle_connection_create ( void *  cls,
const struct GNUNET_CADET_ConnectionCreateMessage msg 
)
static

Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE.

Parameters
clsClosure (CadetPeer for neighbor that sent the message).
msgMessage itself.

Definition at line 712 of file gnunet-service-cadet_core.c.

References GNUNET_TIME_Absolute::abs_value_us, GNUNET_CADET_ConnectionCreateMessage::cid, CadetRoute::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, dir_init(), GCC_handle_duplicate_create(), GCC_lookup(), GCP_2s(), GCP_get(), GCP_get_tunnel(), GCP_has_core_connection(), GCPP_2s(), GCPP_get_path_from_route(), GCT_add_inbound_connection(), get_route(), GNUNET_assert, GNUNET_break_op, GNUNET_CONTAINER_heap_insert(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_create(), GNUNET_CONTAINER_multipeermap_destroy(), GNUNET_CONTAINER_multipeermap_put(), GNUNET_CONTAINER_multishortmap_put(), GNUNET_CONTAINER_multishortmap_size(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_memcmp, GNUNET_MQ_PREF_LOW_LATENCY, GNUNET_MQ_PRIO_CRITICAL_CONTROL, GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_add_delayed(), GNUNET_sh2s(), GNUNET_STATISTICS_set(), GNUNET_SYSERR, GNUNET_TIME_absolute_get(), GNUNET_TIME_relative_multiply(), GNUNET_YES, GNUNET_CADET_ConnectionCreateMessage::header, CadetRoute::hn, keepalive_period, CadetRoute::last_use, LOG, map, max_routes, my_full_id, Rung::next, CadetRoute::next, CadetRoute::prev, route_message(), send_broken_without_mqm(), size, GNUNET_MessageHeader::size, stats, and timeout_cb().

715 {
716  struct CadetPeer *sender = cls;
717  struct CadetPeer *next;
718  const struct GNUNET_PeerIdentity *pids =
719  (const struct GNUNET_PeerIdentity *)&msg[1];
720  struct CadetRoute *route;
721  uint16_t size = ntohs(msg->header.size) - sizeof(*msg);
722  unsigned int path_length;
723  unsigned int off;
724 
725  path_length = size / sizeof(struct GNUNET_PeerIdentity);
726  if (0 == path_length)
727  {
729  "Dropping CADET_CONNECTION_CREATE with empty path\n");
730  GNUNET_break_op(0);
731  return;
732  }
734  "Handling CADET_CONNECTION_CREATE from %s for CID %s with %u hops\n",
735  GCP_2s(sender),
737  path_length);
738  /* Check for loops */
739  {
741 
742  map = GNUNET_CONTAINER_multipeermap_create(path_length * 2, GNUNET_YES);
743  GNUNET_assert(NULL != map);
744  for (unsigned int i = 0; i < path_length; i++)
745  {
747  "CADET_CONNECTION_CREATE has peer %s at offset %u\n",
748  GNUNET_i2s(&pids[i]),
749  i);
751  map,
752  &pids[i],
753  NULL,
755  {
756  /* bogus request */
759  "Dropping CADET_CONNECTION_CREATE with cyclic path\n");
760  GNUNET_break_op(0);
761  return;
762  }
763  }
765  }
766  /* Initiator is at offset 0, find us */
767  for (off = 1; off < path_length; off++)
768  if (0 == GNUNET_memcmp(&my_full_id, &pids[off]))
769  break;
770  if (off == path_length)
771  {
773  "Dropping CADET_CONNECTION_CREATE without us in the path\n");
774  GNUNET_break_op(0);
775  return;
776  }
777  /* Check previous hop */
778  if (sender != GCP_get(&pids[off - 1], GNUNET_NO))
779  {
781  "Dropping CADET_CONNECTION_CREATE without sender at previous hop in the path\n");
782  GNUNET_break_op(0);
783  return;
784  }
785  if (NULL != (route = get_route(&msg->cid)))
786  {
787  /* Duplicate CREATE, pass it on, previous one might have been lost! */
788 
790  "Passing on duplicate CADET_CONNECTION_CREATE message on connection %s\n",
792  route_message(sender,
793  &msg->cid,
794  &msg->header,
797  return;
798  }
799  if (off == path_length - 1)
800  {
801  /* We are the destination, create connection */
802  struct CadetConnection *cc;
803  struct CadetPeerPath *path;
804  struct CadetPeer *origin;
805 
806  cc = GCC_lookup(&msg->cid);
807  if (NULL != cc)
808  {
810  "Received duplicate CADET_CONNECTION_CREATE message on connection %s\n",
813  return;
814  }
815 
816  origin = GCP_get(&pids[0], GNUNET_YES);
818  "I am destination for CADET_CONNECTION_CREATE message from %s for connection %s, building inverse path\n",
819  GCP_2s(origin),
821  path = GCPP_get_path_from_route(path_length - 1, pids);
822  if (GNUNET_OK !=
824  &msg->cid,
825  path))
826  {
827  /* Send back BROKEN: duplicate connection on the same path,
828  we will use the other one. */
830  "Received CADET_CONNECTION_CREATE from %s for %s, but %s already has a connection. Sending BROKEN\n",
831  GCP_2s(sender),
833  GCPP_2s(path));
834  send_broken_without_mqm(sender, &msg->cid, NULL);
835  return;
836  }
837  return;
838  }
839  /* We are merely a hop on the way, check if we can support the route */
840  next = GCP_get(&pids[off + 1], GNUNET_NO);
841  if ((NULL == next) || (GNUNET_NO == GCP_has_core_connection(next)))
842  {
843  /* unworkable, send back BROKEN notification */
845  "Received CADET_CONNECTION_CREATE from %s for %s. Next hop %s:%u is down. Sending BROKEN\n",
846  GCP_2s(sender),
848  GNUNET_i2s(&pids[off + 1]),
849  off + 1);
850  send_broken_without_mqm(sender, &msg->cid, &pids[off + 1]);
851  return;
852  }
854  {
856  "Received CADET_CONNECTION_CREATE from %s for %s. We have reached our route limit. Sending BROKEN\n",
857  GCP_2s(sender),
859  send_broken_without_mqm(sender, &msg->cid, &pids[off - 1]);
860  return;
861  }
862 
863  /* Workable route, create routing entry */
865  "Received CADET_CONNECTION_CREATE from %s for %s. Next hop %s:%u is up. Creating route\n",
866  GCP_2s(sender),
868  GNUNET_i2s(&pids[off + 1]),
869  off + 1);
870  route = GNUNET_new(struct CadetRoute);
871  route->cid = msg->cid;
873  dir_init(&route->prev, route, sender);
874  dir_init(&route->next, route, next);
877  routes,
878  &route->cid.connection_of_tunnel,
879  route,
882  "# routes",
884  GNUNET_NO);
886  route,
887  route->last_use.abs_value_us);
888  if (NULL == timeout_task)
889  timeout_task =
891  3),
892  &timeout_cb,
893  NULL);
894  /* also pass CREATE message along to next hop */
895  route_message(sender,
896  &msg->cid,
897  &msg->header,
899 }
static struct GNUNET_STATISTICS_Handle * stats
Handle for statistics.
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
static void dir_init(struct RouteDirection *dir, struct CadetRoute *route, struct CadetPeer *hop)
Initialize one of the directions of a route.
Peer description.
Low-level connection to a destination.
struct CadetTunnel * GCP_get_tunnel(struct CadetPeer *cp, int create)
Get the tunnel towards a peer.
unsigned int GNUNET_CONTAINER_multishortmap_size(const struct GNUNET_CONTAINER_MultiShortmap *map)
Get the number of key-value pairs in the map.
struct GNUNET_CONTAINER_HeapNode * GNUNET_CONTAINER_heap_insert(struct GNUNET_CONTAINER_Heap *heap, void *element, GNUNET_CONTAINER_HeapCostType cost)
Inserts a new element into the heap.
struct GNUNET_CONTAINER_HeapNode * hn
Position of this route in the route_heap.
static unsigned long long max_routes
Maximum number of concurrent routes this peer will support.
#define LOG(level,...)
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE.
struct GNUNET_PeerIdentity my_full_id
Local peer own ID.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_new(type)
Allocate a struct or union of the given type.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
struct GNUNET_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).
uint64_t abs_value_us
The actual value.
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
static struct GNUNET_CONTAINER_MultiPeerMap * map
Handle to the map used to store old latency values for peers.
const char * GCP_2s(const struct CadetPeer *cp)
Get the static string for a peer ID.
Flag to indicate that low latency is important.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
Unique identifier for the connection that uses this route.
const char * GCPP_2s(struct CadetPeerPath *path)
Convert a path to a human-readable string.
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:1237
static struct CadetRoute * get_route(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Get the route corresponding to a hash.
struct CadetPeerPath * GCPP_get_path_from_route(unsigned int path_length, const struct GNUNET_PeerIdentity *pids)
We got an incoming connection, obtain the corresponding path.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
int GCT_add_inbound_connection(struct CadetTunnel *t, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, struct CadetPeerPath *path)
Add a connection to the tunnel.
struct RouteDirection prev
Information about the previous hop on this route.
Description of a segment of a struct CadetConnection at the intermediate peers.
struct GNUNET_TIME_Absolute last_use
When was this route last in use?
int GNUNET_CONTAINER_multishortmap_put(struct GNUNET_CONTAINER_MultiShortmap *map, const struct GNUNET_ShortHashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
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:440
Internal representation of the hash map.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
struct RouteDirection next
Information about the next hop on this route.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:118
void GCC_handle_duplicate_create(struct CadetConnection *cc)
We got a GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE for a connection that we already have...
There must only be one value per key; storing a value should fail if a value under the same key alrea...
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
static unsigned int size
Size of the "table".
Definition: peer.c:66
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
int GCP_has_core_connection(struct CadetPeer *cp)
Test if cp has a core-level connection.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
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.
The identity of the host (wraps the signing key of the peer).
static struct GNUNET_CONTAINER_Heap * route_heap
Heap of routes, MIN-sorted by last activity.
static struct GNUNET_SCHEDULER_Task * timeout_task
Task to timeout routes.
struct CadetPeer * GCP_get(const struct GNUNET_PeerIdentity *peer_id, int create)
Retrieve the CadetPeer stucture associated with the peer.
struct GNUNET_TIME_Relative keepalive_period
How frequently do we send KEEPALIVE messages on idle connections?
static void route_message(struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
We message msg from prev.
#define GNUNET_YES
Definition: gnunet_common.h:77
static void send_broken_without_mqm(struct CadetPeer *target, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_PeerIdentity *failure_at)
We could not create the desired route.
static void timeout_cb(void *cls)
Function called to check if any routes have timed out, and if so, to clean them up.
Highest priority, control traffic (i.e.
Information regarding a possible path to reach a peer.
struct GNUNET_ShortHashCode connection_of_tunnel
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
static struct GNUNET_CONTAINER_MultiShortmap * routes
Routes on which this peer is an intermediate.
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◆ handle_connection_create_ack()

static void handle_connection_create_ack ( void *  cls,
const struct GNUNET_CADET_ConnectionCreateAckMessage msg 
)
static

Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK.

Parameters
clsClosure (CadetPeer for neighbor that sent the message).
msgMessage itself.

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

References GNUNET_CADET_ConnectionCreateAckMessage::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, GCC_get_path(), GCC_handle_connection_create_ack(), GCC_lookup(), GCPP_get_peer_at_offset(), GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_MQ_PREF_LOW_LATENCY, GNUNET_MQ_PRIO_CRITICAL_CONTROL, GNUNET_sh2s(), GNUNET_CADET_ConnectionCreateAckMessage::header, len, LOG, peer, and route_message().

912 {
913  struct CadetPeer *peer = cls;
914  struct CadetConnection *cc;
915 
916  /* First, check if ACK belongs to a connection that ends here. */
917  cc = GCC_lookup(&msg->cid);
918  if (NULL != cc)
919  {
920  /* verify ACK came from the right direction */
921  unsigned int len;
922  struct CadetPeerPath *path = GCC_get_path(cc, &len);
923 
924  if (peer != GCPP_get_peer_at_offset(path, 0))
925  {
926  /* received ACK from unexpected direction, ignore! */
927  GNUNET_break_op(0);
928  return;
929  }
931  "Received CONNECTION_CREATE_ACK for connection %s.\n",
934  return;
935  }
936 
937  /* We're just an intermediary peer, route the message along its path */
938  route_message(peer,
939  &msg->cid,
940  &msg->header,
942 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
Peer description.
Low-level connection to a destination.
#define LOG(level,...)
void GCC_handle_connection_create_ack(struct CadetConnection *cc)
A GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK was received for this connection, implying that the end-to-end connection is up.
Flag to indicate that low latency is important.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct CadetPeerPath * GCC_get_path(struct CadetConnection *cc, unsigned int *off)
Obtain the path used by this connection.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
struct CadetPeer * GCPP_get_peer_at_offset(struct CadetPeerPath *path, unsigned int off)
Obtain the peer at offset off in path.
static void route_message(struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
We message msg from prev.
Highest priority, control traffic (i.e.
Information regarding a possible path to reach a peer.
struct GNUNET_ShortHashCode connection_of_tunnel
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
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◆ handle_connection_broken()

static void handle_connection_broken ( void *  cls,
const struct GNUNET_CADET_ConnectionBrokenMessage msg 
)
static

Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN.

Parameters
clsClosure (CadetPeer for neighbor that sent the message).
msgMessage itself.
Deprecated:
duplicate logic with #handle_destroy(); dedup!

Definition at line 953 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_ConnectionBrokenMessage::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, destroy_route(), GCC_destroy_without_core(), GCC_get_path(), GCC_lookup(), GCPP_get_peer_at_offset(), get_route(), GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_MQ_PREF_LOW_LATENCY, GNUNET_MQ_PRIO_CRITICAL_CONTROL, GNUNET_sh2s(), GNUNET_CADET_ConnectionBrokenMessage::header, len, LOG, peer, and route_message().

956 {
957  struct CadetPeer *peer = cls;
958  struct CadetConnection *cc;
959  struct CadetRoute *route;
960 
961  /* First, check if message belongs to a connection that ends here. */
962  cc = GCC_lookup(&msg->cid);
963  if (NULL != cc)
964  {
965  /* verify message came from the right direction */
966  unsigned int len;
967  struct CadetPeerPath *path = GCC_get_path(cc, &len);
968 
969  if (peer != GCPP_get_peer_at_offset(path, 0))
970  {
971  /* received message from unexpected direction, ignore! */
972  GNUNET_break_op(0);
973  return;
974  }
976  "Received CONNECTION_BROKEN for connection %s. Destroying it.\n",
979 
980  /* FIXME: also destroy the path up to the specified link! */
981  return;
982  }
983 
984  /* We're just an intermediary peer, route the message along its path */
985  route_message(peer,
986  &msg->cid,
987  &msg->header,
989  route = get_route(&msg->cid);
990  if (NULL != route)
991  destroy_route(route);
992  /* FIXME: also destroy paths we MAY have up to the specified link! */
993 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
Peer description.
Low-level connection to a destination.
#define LOG(level,...)
void GCC_destroy_without_core(struct CadetConnection *cc)
Destroy a connection, called when the CORE layer is already done (i.e.
Flag to indicate that low latency is important.
static void destroy_route(struct CadetRoute *route)
Destroy our state for route.
static struct CadetRoute * get_route(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Get the route corresponding to a hash.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
Description of a segment of a struct CadetConnection at the intermediate peers.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct CadetPeerPath * GCC_get_path(struct CadetConnection *cc, unsigned int *off)
Obtain the path used by this connection.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
struct CadetPeer * GCPP_get_peer_at_offset(struct CadetPeerPath *path, unsigned int off)
Obtain the peer at offset off in path.
static void route_message(struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
We message msg from prev.
Highest priority, control traffic (i.e.
Information regarding a possible path to reach a peer.
struct GNUNET_ShortHashCode connection_of_tunnel
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
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◆ handle_connection_destroy()

static void handle_connection_destroy ( void *  cls,
const struct GNUNET_CADET_ConnectionDestroyMessage msg 
)
static

Handle for GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY.

Parameters
clsClosure (CadetPeer for neighbor that sent the message).
msgMessage itself.

Definition at line 1003 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_ConnectionDestroyMessage::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, destroy_route(), GCC_destroy_without_core(), GCC_get_path(), GCC_lookup(), GCPP_get_peer_at_offset(), get_route(), GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_MQ_PREF_LOW_LATENCY, GNUNET_MQ_PRIO_CRITICAL_CONTROL, GNUNET_sh2s(), GNUNET_CADET_ConnectionDestroyMessage::header, len, LOG, peer, and route_message().

1006 {
1007  struct CadetPeer *peer = cls;
1008  struct CadetConnection *cc;
1009  struct CadetRoute *route;
1010 
1011  /* First, check if message belongs to a connection that ends here. */
1012  cc = GCC_lookup(&msg->cid);
1013  if (NULL != cc)
1014  {
1015  /* verify message came from the right direction */
1016  unsigned int len;
1017  struct CadetPeerPath *path = GCC_get_path(cc, &len);
1018 
1019  if (peer != GCPP_get_peer_at_offset(path, 0))
1020  {
1021  /* received message from unexpected direction, ignore! */
1022  GNUNET_break_op(0);
1023  return;
1024  }
1026  "Received CONNECTION_DESTROY for connection %s. Destroying connection.\n",
1028 
1030  return;
1031  }
1032 
1033  /* We're just an intermediary peer, route the message along its path */
1035  "Received CONNECTION_DESTROY for connection %s. Destroying route.\n",
1037  route_message(peer,
1038  &msg->cid,
1039  &msg->header,
1041  route = get_route(&msg->cid);
1042  if (NULL != route)
1043  destroy_route(route);
1044 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
Peer description.
Low-level connection to a destination.
#define LOG(level,...)
void GCC_destroy_without_core(struct CadetConnection *cc)
Destroy a connection, called when the CORE layer is already done (i.e.
Flag to indicate that low latency is important.
static void destroy_route(struct CadetRoute *route)
Destroy our state for route.
static struct CadetRoute * get_route(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Get the route corresponding to a hash.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
Description of a segment of a struct CadetConnection at the intermediate peers.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct CadetPeerPath * GCC_get_path(struct CadetConnection *cc, unsigned int *off)
Obtain the path used by this connection.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
struct CadetPeer * GCPP_get_peer_at_offset(struct CadetPeerPath *path, unsigned int off)
Obtain the peer at offset off in path.
static void route_message(struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
We message msg from prev.
Highest priority, control traffic (i.e.
Information regarding a possible path to reach a peer.
struct GNUNET_ShortHashCode connection_of_tunnel
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY.
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◆ handle_tunnel_kx()

static void handle_tunnel_kx ( void *  cls,
const struct GNUNET_CADET_TunnelKeyExchangeMessage msg 
)
static

Handle for GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX.

Parameters
clsClosure (CadetPeer for neighbor that sent the message).
msgMessage itself.

Definition at line 1054 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_TunnelKeyExchangeMessage::cid, GNUNET_CADET_ConnectionTunnelIdentifier::connection_of_tunnel, GNUNET_CADET_TunnelKeyExchangeMessage::ephemeral_key, GCC_get_path(), GCC_handle_kx(), GCC_lookup(), GCPP_get_peer_at_offset(), GNUNET_break_op, GNUNET_e2s(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_MQ_PREF_LOW_LATENCY, GNUNET_MQ_PRIO_CRITICAL_CONTROL, GNUNET_sh2s(), GNUNET_CADET_TunnelKeyExchangeMessage::header, len, LOG, peer, and route_message().

1056 {
1057  struct CadetPeer *peer = cls;
1058  struct CadetConnection *cc;
1059 
1060  /* First, check if message belongs to a connection that ends here. */
1062  "Routing KX with ephemeral %s on CID %s\n",
1063  GNUNET_e2s(&msg->ephemeral_key),
1065 
1066 
1067  cc = GCC_lookup(&msg->cid);
1068  if (NULL != cc)
1069  {
1070  /* verify message came from the right direction */
1071  unsigned int len;
1072  struct CadetPeerPath *path = GCC_get_path(cc, &len);
1073 
1074  if (peer != GCPP_get_peer_at_offset(path, 0))
1075  {
1076  /* received message from unexpected direction, ignore! */
1077  GNUNET_break_op(0);
1078  return;
1079  }
1080  GCC_handle_kx(cc, msg);
1081  return;
1082  }
1083 
1084  /* We're just an intermediary peer, route the message along its path */
1085  route_message(peer,
1086  &msg->cid,
1087  &msg->header,
1089 }
const char * GNUNET_sh2s(const struct GNUNET_ShortHashCode *shc)
Convert a short hash value to a string (for printing debug messages).
Peer description.
Low-level connection to a destination.
#define LOG(level,...)
void GCC_handle_kx(struct CadetConnection *cc, const struct GNUNET_CADET_TunnelKeyExchangeMessage *msg)
Handle KX message.
Flag to indicate that low latency is important.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct CadetPeerPath * GCC_get_path(struct CadetConnection *cc, unsigned int *off)
Obtain the path used by this connection.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX or GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX_AUTH as part of stru...
struct CadetPeer * GCPP_get_peer_at_offset(struct CadetPeerPath *path, unsigned int off)
Obtain the peer at offset off in path.
static void route_message(struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
We message msg from prev.
struct GNUNET_CRYPTO_EcdhePublicKey ephemeral_key
Sender&#39;s ephemeral public ECC key encoded in a format suitable for network transmission, as created using &#39;gcry_sexp_sprint&#39;.
Highest priority, control traffic (i.e.
const char * GNUNET_e2s(const struct GNUNET_CRYPTO_EcdhePublicKey *p)
Convert a public key value to a string (for printing debug messages).
Information regarding a possible path to reach a peer.
struct GNUNET_ShortHashCode connection_of_tunnel
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
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◆ handle_tunnel_kx_auth()

static void handle_tunnel_kx_auth ( void *  cls,
const struct GNUNET_CADET_TunnelKeyExchangeAuthMessage msg 
)
static

Handle for GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX_AUTH.

Parameters
clsClosure (CadetPeer for neighbor that sent the message).
msgMessage itself.

Definition at line 1099 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_TunnelKeyExchangeMessage::cid, GCC_get_path(), GCC_handle_kx_auth(), GCC_lookup(), GCPP_get_peer_at_offset(), GNUNET_break_op, GNUNET_MQ_PREF_LOW_LATENCY, GNUNET_MQ_PRIO_CRITICAL_CONTROL, GNUNET_CADET_TunnelKeyExchangeMessage::header, GNUNET_CADET_TunnelKeyExchangeAuthMessage::kx, len, peer, and route_message().

1102 {
1103  struct CadetPeer *peer = cls;
1104  struct CadetConnection *cc;
1105 
1106  /* First, check if message belongs to a connection that ends here. */
1107  cc = GCC_lookup(&msg->kx.cid);
1108  if (NULL != cc)
1109  {
1110  /* verify message came from the right direction */
1111  unsigned int len;
1112  struct CadetPeerPath *path = GCC_get_path(cc, &len);
1113 
1114  if (peer != GCPP_get_peer_at_offset(path, 0))
1115  {
1116  /* received message from unexpected direction, ignore! */
1117  GNUNET_break_op(0);
1118  return;
1119  }
1120  GCC_handle_kx_auth(cc, msg);
1121  return;
1122  }
1123 
1124  /* We're just an intermediary peer, route the message along its path */
1125  route_message(peer,
1126  &msg->kx.cid,
1127  &msg->kx.header,
1129 }
Peer description.
Low-level connection to a destination.
struct GNUNET_CADET_TunnelKeyExchangeMessage kx
Message header with key material.
Flag to indicate that low latency is important.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct CadetPeerPath * GCC_get_path(struct CadetConnection *cc, unsigned int *off)
Obtain the path used by this connection.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX or GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX_AUTH as part of stru...
struct CadetPeer * GCPP_get_peer_at_offset(struct CadetPeerPath *path, unsigned int off)
Obtain the peer at offset off in path.
static void route_message(struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
We message msg from prev.
void GCC_handle_kx_auth(struct CadetConnection *cc, const struct GNUNET_CADET_TunnelKeyExchangeAuthMessage *msg)
Handle KX_AUTH message.
Highest priority, control traffic (i.e.
Information regarding a possible path to reach a peer.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
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◆ check_tunnel_encrypted()

static int check_tunnel_encrypted ( void *  cls,
const struct GNUNET_CADET_TunnelEncryptedMessage msg 
)
static

Check if the encrypted message has the appropriate size.

Parameters
clsClosure (unused).
msgMessage to check.
Returns
GNUNET_YES if size is correct, GNUNET_NO otherwise.

Definition at line 1141 of file gnunet-service-cadet_core.c.

References GNUNET_YES.

1143 {
1144  return GNUNET_YES;
1145 }
#define GNUNET_YES
Definition: gnunet_common.h:77

◆ handle_tunnel_encrypted()

static void handle_tunnel_encrypted ( void *  cls,
const struct GNUNET_CADET_TunnelEncryptedMessage msg 
)
static

Handle for GNUNET_MESSAGE_TYPE_CADET_TUNNEL_ENCRYPTED.

Parameters
clsClosure (CadetPeer for neighbor that sent the message).
msgMessage itself.

Definition at line 1155 of file gnunet-service-cadet_core.c.

References GNUNET_CADET_TunnelEncryptedMessage::cid, GCC_get_path(), GCC_handle_encrypted(), GCC_lookup(), GCPP_get_peer_at_offset(), GNUNET_break_op, GNUNET_MQ_PRIO_BEST_EFFORT, GNUNET_CADET_TunnelEncryptedMessage::header, len, peer, and route_message().

1157 {
1158  struct CadetPeer *peer = cls;
1159  struct CadetConnection *cc;
1160 
1161  /* First, check if message belongs to a connection that ends here. */
1162  cc = GCC_lookup(&msg->cid);
1163  if (NULL != cc)
1164  {
1165  /* verify message came from the right direction */
1166  unsigned int len;
1167  struct CadetPeerPath *path = GCC_get_path(cc, &len);
1168 
1169  if (peer != GCPP_get_peer_at_offset(path, 0))
1170  {
1171  /* received message from unexpected direction, ignore! */
1172  GNUNET_break_op(0);
1173  return;
1174  }
1175  GCC_handle_encrypted(cc, msg);
1176  return;
1177  }
1178  /* We're just an intermediary peer, route the message along its path */
1179  route_message(peer, &msg->cid, &msg->header, GNUNET_MQ_PRIO_BEST_EFFORT);
1180 }
Peer description.
Low-level connection to a destination.
Best-effort traffic (i.e.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_CADET_TUNNEL_ENCRYPTED.
struct GNUNET_CADET_ConnectionTunnelIdentifier cid
ID of the connection.
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
struct CadetPeerPath * GCC_get_path(struct CadetConnection *cc, unsigned int *off)
Obtain the path used by this connection.
struct CadetConnection * GCC_lookup(const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid)
Lookup a connection by its identifier.
void GCC_handle_encrypted(struct CadetConnection *cc, const struct GNUNET_CADET_TunnelEncryptedMessage *msg)
Handle encrypted message.
struct CadetPeer * GCPP_get_peer_at_offset(struct CadetPeerPath *path, unsigned int off)
Obtain the peer at offset off in path.
static void route_message(struct CadetPeer *prev, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, const struct GNUNET_MessageHeader *msg, const enum GNUNET_MQ_PriorityPreferences priority)
We message msg from prev.
Information regarding a possible path to reach a peer.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
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◆ core_init_cb()

static void core_init_cb ( void *  cls,
const struct GNUNET_PeerIdentity my_identity 
)
static

Function called after GNUNET_CORE_connect has succeeded (or failed for good).

Note that the private key of the peer is intentionally not exposed here; if you need it, your process should try to read the private key file directly (which should work if you are authorized...). Implementations of this function must not call GNUNET_CORE_disconnect (other than by scheduling a new task to do this later).

Parameters
clsclosure
my_identityID of this peer, NULL if we failed

Definition at line 1196 of file gnunet-service-cadet_core.c.

References GNUNET_break, GNUNET_memcmp, and my_full_id.

Referenced by GCO_init().

1197 {
1198  if (NULL == my_identity)
1199  {
1200  GNUNET_break(0);
1201  return;
1202  }
1203  GNUNET_break(0 == GNUNET_memcmp(my_identity, &my_full_id));
1204 }
struct GNUNET_PeerIdentity my_full_id
Local peer own ID.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
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◆ core_connect_cb()

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

Method called whenever a given peer connects.

Parameters
clsclosure
peerpeer identity this notification is about

Definition at line 1214 of file gnunet-service-cadet_core.c.

References GCP_get(), GCP_set_mq(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_YES, and LOG.

Referenced by GCO_init().

1217 {
1218  struct CadetPeer *cp;
1219 
1221  "CORE connection to peer %s was established.\n",
1222  GNUNET_i2s(peer));
1223  cp = GCP_get(peer, GNUNET_YES);
1224  GCP_set_mq(cp, mq);
1225  return cp;
1226 }
Peer description.
#define LOG(level,...)
void GCP_set_mq(struct CadetPeer *cp, struct GNUNET_MQ_Handle *mq)
Set the message queue to mq for peer cp and notify watchers.
struct CadetPeer * GCP_get(const struct GNUNET_PeerIdentity *peer_id, int create)
Retrieve the CadetPeer stucture associated with the peer.
#define GNUNET_YES
Definition: gnunet_common.h:77
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
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◆ core_disconnect_cb()

static void core_disconnect_cb ( void *  cls,
const struct GNUNET_PeerIdentity peer,
void *  peer_cls 
)
static

Method called whenever a peer disconnects.

Parameters
clsclosure
peerpeer identity this notification is about

Definition at line 1236 of file gnunet-service-cadet_core.c.

References GCP_set_mq(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), and LOG.

Referenced by GCO_init().

1239 {
1240  struct CadetPeer *cp = peer_cls;
1241 
1243  "CORE connection to peer %s went down.\n",
1244  GNUNET_i2s(peer));
1245  GCP_set_mq(cp, NULL);
1246 }
Peer description.
#define LOG(level,...)
void GCP_set_mq(struct CadetPeer *cp, struct GNUNET_MQ_Handle *mq)
Set the message queue to mq for peer cp and notify watchers.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
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◆ GCO_init()

void GCO_init ( const struct GNUNET_CONFIGURATION_Handle c)

Initialize the CORE subsystem.

Parameters
cConfiguration.

Definition at line 1255 of file gnunet-service-cadet_core.c.

References connection_create(), core_connect_cb(), core_disconnect_cb(), core_init_cb(), GNUNET_CONFIGURATION_get_value_number(), GNUNET_CONTAINER_heap_create(), GNUNET_CONTAINER_HEAP_ORDER_MIN, GNUNET_CONTAINER_multishortmap_create(), GNUNET_CORE_connect(), GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN, GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE, GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK, GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY, GNUNET_MESSAGE_TYPE_CADET_TUNNEL_ENCRYPTED, GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX, GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX_AUTH, GNUNET_MQ_handler_end, GNUNET_MQ_hd_fixed_size, GNUNET_MQ_hd_var_size, GNUNET_NO, GNUNET_OK, max_buffers, and max_routes.

Referenced by run().

1256 {
1261  NULL),
1262  GNUNET_MQ_hd_fixed_size(connection_create_ack,
1265  NULL),
1266  GNUNET_MQ_hd_fixed_size(connection_broken,
1269  NULL),
1270  GNUNET_MQ_hd_fixed_size(connection_destroy,
1273  NULL),
1274  GNUNET_MQ_hd_fixed_size(tunnel_kx,
1277  NULL),
1278  GNUNET_MQ_hd_fixed_size(tunnel_kx_auth,
1281  NULL),
1282  GNUNET_MQ_hd_var_size(tunnel_encrypted,
1285  NULL),
1287 
1289  "CADET",
1290  "MAX_ROUTES",
1291  &max_routes))
1292  max_routes = 5000;
1294  "CADET",
1295  "MAX_MSGS_QUEUE",
1296  &max_buffers))
1297  max_buffers = 10000;
1301  NULL,
1302  &core_init_cb,
1303  &core_connect_cb,
1305  handlers);
1306 }
Axolotl-encrypted tunnel message with application payload.
#define GNUNET_MESSAGE_TYPE_CADET_TUNNEL_ENCRYPTED
Axolotl encrypted data.
static unsigned long long max_buffers
Maximum number of envelopes we will buffer at this peer.
int GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
Message to destroy a connection.
static unsigned long long max_routes
Maximum number of concurrent routes this peer will support.
static void core_disconnect_cb(void *cls, const struct GNUNET_PeerIdentity *peer, void *peer_cls)
Method called whenever a peer disconnects.
Message for ack&#39;ing a connection.
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
static struct CadetConnection * connection_create(struct CadetPeer *destination, struct CadetPeerPath *path, unsigned int off, struct CadetTConnection *ct, const struct GNUNET_CADET_ConnectionTunnelIdentifier *cid, enum CadetConnectionState init_state, GCC_ReadyCallback ready_cb, void *ready_cb_cls)
Create a connection to destination via path and notify cb whenever we are ready for more data...
#define GNUNET_NO
Definition: gnunet_common.h:78
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
static void * core_connect_cb(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a given peer connects.
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
Message for a Key eXchange for a tunnel, with authentication.
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE
Request the creation of a connection.
Message for notifying a disconnection in a path.
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_CREATE_ACK
Send origin an ACK that the connection is complete.
struct GNUNET_CONTAINER_MultiShortmap * GNUNET_CONTAINER_multishortmap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
Heap with the minimum cost at the root.
Message handler for a specific message type.
static void core_init_cb(void *cls, const struct GNUNET_PeerIdentity *my_identity)
Function called after GNUNET_CORE_connect has succeeded (or failed for good).
struct GNUNET_CORE_Handle * GNUNET_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)
Connect to the core service.
Definition: core_api.c:690
struct GNUNET_CONTAINER_Heap * GNUNET_CONTAINER_heap_create(enum GNUNET_CONTAINER_HeapOrder order)
Create a new heap.
static struct GNUNET_CONTAINER_Heap * route_heap
Heap of routes, MIN-sorted by last activity.
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_DESTROY
Request the destuction of a connection.
Message for a Key eXchange for a tunnel.
#define GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX_AUTH
Axolotl key exchange response with authentication.
#define GNUNET_MESSAGE_TYPE_CADET_CONNECTION_BROKEN
Notify that a connection is no longer valid.
Message for cadet connection creation.
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
static struct GNUNET_CORE_Handle * core
Handle to the CORE service.
#define GNUNET_MESSAGE_TYPE_CADET_TUNNEL_KX
Axolotl key exchange.
static struct GNUNET_CONTAINER_MultiShortmap * routes
Routes on which this peer is an intermediate.
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◆ GCO_shutdown()

void GCO_shutdown ( void  )

Shut down the CORE subsystem.

Definition at line 1313 of file gnunet-service-cadet_core.c.

References GNUNET_assert, GNUNET_CONTAINER_heap_destroy(), GNUNET_CONTAINER_multishortmap_destroy(), GNUNET_CONTAINER_multishortmap_size(), GNUNET_CORE_disconnect(), and GNUNET_SCHEDULER_cancel().

Referenced by shutdown_task().

1314 {
1315  if (NULL != core)
1316  {
1318  core = NULL;
1319  }
1322  routes = NULL;
1324  route_heap = NULL;
1325  if (NULL != timeout_task)
1326  {
1328  timeout_task = NULL;
1329  }
1330 }
unsigned int GNUNET_CONTAINER_multishortmap_size(const struct GNUNET_CONTAINER_MultiShortmap *map)
Get the number of key-value pairs in the map.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
void GNUNET_CONTAINER_heap_destroy(struct GNUNET_CONTAINER_Heap *heap)
Destroys the heap.
void GNUNET_CORE_disconnect(struct GNUNET_CORE_Handle *handle)
Disconnect from the core service.
Definition: core_api.c:728
void GNUNET_CONTAINER_multishortmap_destroy(struct GNUNET_CONTAINER_MultiShortmap *map)
Destroy a hash map.
static struct GNUNET_CONTAINER_Heap * route_heap
Heap of routes, MIN-sorted by last activity.
static struct GNUNET_SCHEDULER_Task * timeout_task
Task to timeout routes.
static struct GNUNET_CORE_Handle * core
Handle to the CORE service.
static struct GNUNET_CONTAINER_MultiShortmap * routes
Routes on which this peer is an intermediate.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:956
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Variable Documentation

◆ core

struct GNUNET_CORE_Handle* core
static

Handle to the CORE service.

Definition at line 179 of file gnunet-service-cadet_core.c.

Referenced by inittransport_smtp().

◆ routes

struct GNUNET_CONTAINER_MultiShortmap* routes
static

Routes on which this peer is an intermediate.

Definition at line 184 of file gnunet-service-cadet_core.c.

◆ route_heap

struct GNUNET_CONTAINER_Heap* route_heap
static

Heap of routes, MIN-sorted by last activity.

Definition at line 189 of file gnunet-service-cadet_core.c.

◆ rung_zero

struct Rung rung_zero
static

Rung zero (always pointed to by rung_head).

Definition at line 194 of file gnunet-service-cadet_core.c.

◆ rung_head

struct Rung* rung_head = &rung_zero
static

DLL of rungs, with the head always point to a rung of route directions with no messages in the queue.

Definition at line 200 of file gnunet-service-cadet_core.c.

Referenced by dir_init().

◆ rung_tail

struct Rung* rung_tail = &rung_zero
static

Tail of the rung_head DLL.

Definition at line 205 of file gnunet-service-cadet_core.c.

Referenced by discard_all_from_rung_tail().

◆ max_routes

unsigned long long max_routes
static

Maximum number of concurrent routes this peer will support.

Definition at line 210 of file gnunet-service-cadet_core.c.

Referenced by GCO_init(), and handle_connection_create().

◆ max_buffers

unsigned long long max_buffers
static

Maximum number of envelopes we will buffer at this peer.

Definition at line 215 of file gnunet-service-cadet_core.c.

Referenced by GCO_init(), and route_message().

◆ cur_buffers

unsigned long long cur_buffers
static

Current number of envelopes we have buffered at this peer.

Definition at line 220 of file gnunet-service-cadet_core.c.

Referenced by dir_ready_cb(), discard_buffer(), and route_message().

◆ timeout_task

struct GNUNET_SCHEDULER_Task* timeout_task
static

Task to timeout routes.

Definition at line 225 of file gnunet-service-cadet_core.c.