GNUnet  0.19.3
gnunet-service-revocation.c File Reference

key revocation service More...

#include "platform.h"
#include <math.h>
#include "gnunet_util_lib.h"
#include "gnunet_block_lib.h"
#include "gnunet_constants.h"
#include "gnunet_protocols.h"
#include "gnunet_signatures.h"
#include "gnunet_statistics_service.h"
#include "gnunet_core_service.h"
#include "gnunet_revocation_service.h"
#include "gnunet_setu_service.h"
#include "revocation.h"
#include <gcrypt.h>
Include dependency graph for gnunet-service-revocation.c:

Go to the source code of this file.

Data Structures

struct  PeerEntry
 Per-peer information. More...
 

Functions

static struct PeerEntrynew_peer_entry (const struct GNUNET_PeerIdentity *peer)
 Create a new PeerEntry and add it to the peers multipeermap. More...
 
static enum GNUNET_GenericReturnValue verify_revoke_message (const struct RevokeMessage *rm)
 An revoke message has been received, check that it is well-formed. More...
 
static void * client_connect_cb (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
 Handle client connecting to the service. More...
 
static void client_disconnect_cb (void *cls, struct GNUNET_SERVICE_Client *client, void *app_cls)
 Handle client connecting to the service. More...
 
static int check_query_message (void *cls, const struct QueryMessage *qm)
 
static void handle_query_message (void *cls, const struct QueryMessage *qm)
 Handle QUERY message from client. More...
 
static enum GNUNET_GenericReturnValue do_flood (void *cls, const struct GNUNET_PeerIdentity *target, void *value)
 Flood the given revocation message to all neighbours. More...
 
static enum GNUNET_GenericReturnValue publicize_rm (const struct RevokeMessage *rm)
 Publicize revocation message. More...
 
static int check_revoke_message (void *cls, const struct RevokeMessage *rm)
 
static void handle_revoke_message (void *cls, const struct RevokeMessage *rm)
 Handle REVOKE message from client. More...
 
static int check_p2p_revoke (void *cls, const struct RevokeMessage *rm)
 
static void handle_p2p_revoke (void *cls, const struct RevokeMessage *rm)
 Core handler for flooded revocation messages. More...
 
static void add_revocation (void *cls, const struct GNUNET_SETU_Element *element, uint64_t current_size, enum GNUNET_SETU_Status status)
 Callback for set operation results. More...
 
static void transmit_task_cb (void *cls)
 The timeout for performing the set union has expired, run the set operation on the revocation certificates. More...
 
static void * handle_core_connect (void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
 Method called whenever a peer connects. More...
 
static void handle_core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
 Method called whenever a peer disconnects. More...
 
static int free_entry (void *cls, const struct GNUNET_HashCode *key, void *value)
 Free all values in a hash map. More...
 
static void shutdown_task (void *cls)
 Task run during shutdown. More...
 
static void core_init (void *cls, const struct GNUNET_PeerIdentity *identity)
 Called on core init/fail. More...
 
static void handle_revocation_union_request (void *cls, const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_MessageHeader *context_msg, struct GNUNET_SETU_Request *request)
 Called when another peer wants to do a set operation with the local peer. More...
 
static void run (void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
 Handle network size estimate clients. More...
 
 GNUNET_SERVICE_MAIN ("revocation", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_var_size(query_message, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY, struct QueryMessage, NULL), GNUNET_MQ_hd_var_size(revoke_message, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, struct RevokeMessage, NULL), GNUNET_MQ_handler_end())
 Define "main" method using service macro. More...
 

Variables

static struct GNUNET_SETU_Handlerevocation_set
 Set from all revocations known to us. More...
 
static struct GNUNET_CONTAINER_MultiHashMaprevocation_map
 Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessage. More...
 
static const struct GNUNET_CONFIGURATION_Handlecfg
 Handle to our current configuration. More...
 
static struct GNUNET_STATISTICS_Handlestats
 Handle to the statistics service. More...
 
static struct GNUNET_CORE_Handlecore_api
 Handle to the core service (for flooding) More...
 
static struct GNUNET_CONTAINER_MultiPeerMappeers
 Map of all connected peers. More...
 
static struct GNUNET_PeerIdentity my_identity
 The peer identity of this peer. More...
 
static struct GNUNET_DISK_FileHandlerevocation_db
 File handle for the revocation database. More...
 
static struct GNUNET_SETU_ListenHandlerevocation_union_listen_handle
 Handle for us listening to incoming revocation set union requests. More...
 
static unsigned long long revocation_work_required
 Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits. More...
 
static struct GNUNET_TIME_Relative epoch_duration
 Length of an expiration expoch. More...
 
static struct GNUNET_HashCode revocation_set_union_app_id
 Our application ID for set union operations. More...
 

Detailed Description

key revocation service

Author
Christian Grothoff

The purpose of this service is to allow users to permanently revoke (compromised) keys. This is done by flooding the network with the revocation requests. To reduce the attack potential offered by such flooding, revocations must include a proof of work. We use the set service for efficiently computing the union of revocations of peers that connect.

TODO:

  • optimization: avoid sending revocation back to peer that we got it from;
  • optimization: have randomized delay in sending revocations to other peers to make it rare to traverse each link twice (NSE-style)

Definition in file gnunet-service-revocation.c.

Function Documentation

◆ new_peer_entry()

static struct PeerEntry* new_peer_entry ( const struct GNUNET_PeerIdentity peer)
static

Create a new PeerEntry and add it to the peers multipeermap.

Parameters
peerthe peer identity
Returns
a pointer to the new PeerEntry

Definition at line 150 of file gnunet-service-revocation.c.

151 {
152  struct PeerEntry *peer_entry;
153 
154  peer_entry = GNUNET_new (struct PeerEntry);
155  peer_entry->id = *peer;
158  &peer_entry->id,
159  peer_entry,
161  return peer_entry;
162 }
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY
There must only be one value per key; storing a value should fail if a value under the same key alrea...
@ GNUNET_OK
#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.
Per-peer information.
struct GNUNET_PeerIdentity id
What is the identity of the peer?
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.

References GNUNET_assert, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_put(), GNUNET_new, GNUNET_OK, PeerEntry::id, peer, and peers.

Referenced by handle_core_connect(), and handle_revocation_union_request().

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◆ verify_revoke_message()

static enum GNUNET_GenericReturnValue verify_revoke_message ( const struct RevokeMessage rm)
static

An revoke message has been received, check that it is well-formed.

Parameters
rmthe message to verify
Returns
GNUNET_YES if the message is verified GNUNET_NO if the key/signature don't verify

Definition at line 150 of file gnunet-service-revocation.c.

174 {
175  const struct GNUNET_REVOCATION_PowP *pow
176  = (const struct GNUNET_REVOCATION_PowP *) &rm[1];
177 
178  if (GNUNET_YES !=
180  (unsigned int) revocation_work_required,
182  {
184  "Proof of work invalid!\n");
185  GNUNET_break_op (0);
186  return GNUNET_NO;
187  }
188  return GNUNET_YES;
189 }
static struct GNUNET_TIME_Relative epoch_duration
Length of an expiration expoch.
static unsigned long long revocation_work_required
Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits.
#define GNUNET_log(kind,...)
@ GNUNET_YES
@ GNUNET_NO
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
@ GNUNET_ERROR_TYPE_DEBUG
enum GNUNET_GenericReturnValue GNUNET_REVOCATION_check_pow(const struct GNUNET_REVOCATION_PowP *pow, unsigned int matching_bits, struct GNUNET_TIME_Relative epoch_duration)
Check if the given proof-of-work is valid.
Struct for a proof of work as part of the revocation.

◆ client_connect_cb()

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

Handle client connecting to the service.

Parameters
clsNULL
clientthe new client
mqthe message queue of client
Returns
client

Definition at line 201 of file gnunet-service-revocation.c.

204 {
205  return client;
206 }

◆ client_disconnect_cb()

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

Handle client connecting to the service.

Parameters
clsNULL
clientthe new client
app_clsmust alias client

Definition at line 217 of file gnunet-service-revocation.c.

220 {
221  GNUNET_assert (client == app_cls);
222 }

References GNUNET_assert.

◆ check_query_message()

static int check_query_message ( void *  cls,
const struct QueryMessage qm 
)
static

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

227 {
228  uint16_t size;
229 
230  size = ntohs (qm->header.size);
231  if (size <= sizeof(struct RevokeMessage) ||
232  (size > UINT16_MAX))
233  {
234  GNUNET_break (0);
235  return GNUNET_SYSERR;
236  }
237  return GNUNET_OK;
238 
239 }
@ GNUNET_SYSERR
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
static unsigned int size
Size of the "table".
Definition: peer.c:68
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_REVOCATION_QUERY.
Definition: revocation.h:42
Revoke key.
Definition: revocation.h:80

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

◆ handle_query_message()

static void handle_query_message ( void *  cls,
const struct QueryMessage qm 
)
static

Handle QUERY message from client.

Parameters
clsclient who sent the message
qmthe message received

Definition at line 249 of file gnunet-service-revocation.c.

251 {
252  struct GNUNET_SERVICE_Client *client = cls;
254  struct GNUNET_MQ_Envelope *env;
255  struct QueryResponseMessage *qrm;
256  struct GNUNET_HashCode hc;
257  int res;
258  size_t key_len;
259  size_t read;
260 
261  key_len = ntohl (qm->key_len);
262  if ((GNUNET_SYSERR ==
264  &zone, &read)) ||
265  (read != key_len))
266  {
268  "Unable to parse query public key\n");
270  return;
271  }
272  GNUNET_CRYPTO_hash (&qm[1],
273  key_len,
274  &hc);
276  &hc);
278  (GNUNET_NO == res)
279  ? "Received revocation check for valid key `%s' from client\n"
280  : "Received revocation check for revoked key `%s' from client\n",
281  GNUNET_h2s (&hc));
282  env = GNUNET_MQ_msg (qrm,
284  qrm->is_valid = htonl ((GNUNET_YES == res) ? GNUNET_NO : GNUNET_YES);
286  env);
288 }
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static int res
static char * zone
Name of the zone being managed.
static struct GNUNET_CONTAINER_MultiHashMap * revocation_map
Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessag...
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multihashmap_contains(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key)
Check if the map contains any value under the given key (including values that are NULL).
enum GNUNET_GenericReturnValue GNUNET_IDENTITY_read_public_key_from_buffer(const void *buffer, size_t len, struct GNUNET_IDENTITY_PublicKey *key, size_t *kb_read)
Reads a GNUNET_IDENTITY_PublicKey from a compact buffer.
Definition: identity_api.c:865
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
@ GNUNET_ERROR_TYPE_ERROR
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:304
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:77
#define GNUNET_MESSAGE_TYPE_REVOCATION_QUERY_RESPONSE
Service to client: answer if key was revoked!
void GNUNET_SERVICE_client_drop(struct GNUNET_SERVICE_Client *c)
Ask the server to disconnect from the given client.
Definition: service.c:2330
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2443
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2249
A 512-bit hashcode.
An identity key as per LSD0001.
Handle to a client that is connected to a service.
Definition: service.c:252
uint32_t key_len
Key length.
Definition: revocation.h:47
Key revocation response.
Definition: revocation.h:59
uint32_t is_valid
GNUNET_NO if revoked, GNUNET_YES if valid.
Definition: revocation.h:68

◆ do_flood()

static enum GNUNET_GenericReturnValue do_flood ( void *  cls,
const struct GNUNET_PeerIdentity target,
void *  value 
)
static

Flood the given revocation message to all neighbours.

Parameters
clsthe struct RevokeMessage to flood
targeta neighbour
valueour struct PeerEntry for the neighbour
Returns
GNUNET_OK (continue to iterate)

Definition at line 249 of file gnunet-service-revocation.c.

303 {
304  const struct RevokeMessage *rm = cls;
305  struct PeerEntry *pe = value;
306  struct GNUNET_MQ_Envelope *e;
307  struct RevokeMessage *cp;
308 
309  if (NULL == pe->mq)
310  return GNUNET_OK; /* peer connected to us via SET,
311  but we have no direct CORE
312  connection for flooding */
313  e = GNUNET_MQ_msg_extra (cp,
314  htonl (rm->pow_size),
316  *cp = *rm;
317  memcpy (&cp[1],
318  &rm[1],
319  htonl (rm->pow_size));
321  "Flooding revocation to `%s'\n",
322  GNUNET_i2s (target));
323  GNUNET_MQ_send (pe->mq,
324  e);
325  return GNUNET_OK;
326 }
static struct Experiment * e
static char * value
Value of the record to add/remove.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct.
Definition: gnunet_mq_lib.h:62
#define GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE
Client to service OR peer-to-peer: revoke this key!
struct GNUNET_MQ_Handle * mq
Queue for sending messages to this peer.
uint32_t pow_size
Length of PoW with signature.
Definition: revocation.h:89

References env, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CRYPTO_hash(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), GNUNET_IDENTITY_read_public_key_from_buffer(), GNUNET_log, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY_RESPONSE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_SERVICE_client_get_mq(), GNUNET_SYSERR, GNUNET_YES, QueryResponseMessage::is_valid, QueryMessage::key_len, res, revocation_map, and zone.

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◆ publicize_rm()

static enum GNUNET_GenericReturnValue publicize_rm ( const struct RevokeMessage rm)
static

Publicize revocation message.

Stores the message locally in the database and passes it to all connected neighbours (and adds it to the set for future connections).

Parameters
rmmessage to publicize
Returns
GNUNET_OK on success, GNUNET_NO if we encountered an error, GNUNET_SYSERR if the message was malformed

FIXME yeah this works, but should we have a key length somewhere?

Definition at line 249 of file gnunet-service-revocation.c.

340 {
341  struct RevokeMessage *cp;
342  struct GNUNET_HashCode hc;
343  struct GNUNET_SETU_Element e;
344  ssize_t pklen;
345  const struct GNUNET_REVOCATION_PowP *pow
346  = (const struct GNUNET_REVOCATION_PowP *) &rm[1];
347  const struct GNUNET_IDENTITY_PublicKey *pk
348  = (const struct GNUNET_IDENTITY_PublicKey *) &pow[1];
349 
352  if (0 > pklen)
353  {
354  GNUNET_break_op (0);
355  return GNUNET_SYSERR;
356  }
358  pklen,
359  &hc);
360  if (GNUNET_YES ==
362  &hc))
363  {
365  "Duplicate revocation received from peer. Ignored.\n");
366  return GNUNET_OK;
367  }
368  if (GNUNET_OK !=
370  {
371  GNUNET_break_op (0);
372  return GNUNET_SYSERR;
373  }
374  /* write to disk */
375  if (sizeof(struct RevokeMessage) !=
377  rm,
378  sizeof(struct RevokeMessage)))
379  {
381  "write");
382  return GNUNET_NO;
383  }
384  if (GNUNET_OK !=
386  {
388  "sync");
389  return GNUNET_NO;
390  }
391  /* keep copy in memory */
392  cp = (struct RevokeMessage *) GNUNET_copy_message (&rm->header);
395  &hc,
396  cp,
398  /* add to set for future connections */
399  e.size = htons (rm->header.size);
400  e.element_type = GNUNET_BLOCK_TYPE_REVOCATION;
401  e.data = rm;
402  if (GNUNET_OK !=
404  &e,
405  NULL,
406  NULL))
407  {
408  GNUNET_break (0);
409  return GNUNET_OK;
410  }
411  else
412  {
414  "Added revocation info to SET\n");
415  }
416  /* flood to neighbours */
418  &do_flood,
419  cp);
420  return GNUNET_OK;
421 }
@ GNUNET_BLOCK_TYPE_REVOCATION
Block type for a revocation message by which a key is revoked.
struct GNUNET_IDENTITY_PrivateKey pk
Private key from command line option, or NULL.
static struct GNUNET_DISK_FileHandle * revocation_db
File handle for the revocation database.
static struct GNUNET_SETU_Handle * revocation_set
Set from all revocations known to us.
static enum GNUNET_GenericReturnValue do_flood(void *cls, const struct GNUNET_PeerIdentity *target, void *value)
Flood the given revocation message to all neighbours.
static enum GNUNET_GenericReturnValue verify_revoke_message(const struct RevokeMessage *rm)
An revoke message has been received, check that it is well-formed.
ssize_t GNUNET_DISK_file_write(const struct GNUNET_DISK_FileHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: disk.c:685
enum GNUNET_GenericReturnValue GNUNET_DISK_file_sync(const struct GNUNET_DISK_FileHandle *h)
Write file changes to disk.
Definition: disk.c:1424
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
ssize_t GNUNET_IDENTITY_public_key_get_length(const struct GNUNET_IDENTITY_PublicKey *key)
Get the compacted length of a GNUNET_IDENTITY_PublicKey.
Definition: identity_api.c:830
#define GNUNET_log_strerror(level, cmd)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
struct GNUNET_MessageHeader * GNUNET_copy_message(const struct GNUNET_MessageHeader *msg)
Create a copy of the given message.
int GNUNET_SETU_add_element(struct GNUNET_SETU_Handle *set, const struct GNUNET_SETU_Element *element, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Add an element to the given set.
Definition: setu_api.c:429
Element stored in a set.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE.
Definition: revocation.h:84

Referenced by handle_p2p_revoke(), and handle_revoke_message().

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◆ check_revoke_message()

static int check_revoke_message ( void *  cls,
const struct RevokeMessage rm 
)
static

Definition at line 425 of file gnunet-service-revocation.c.

427 {
428  uint16_t size;
429 
430  size = ntohs (rm->header.size);
431  if (size <= sizeof(struct RevokeMessage) ||
432  (size > UINT16_MAX))
433  {
434  GNUNET_break (0);
435  return GNUNET_SYSERR;
436  }
437  return GNUNET_OK;
438 
439 }

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

◆ handle_revoke_message()

static void handle_revoke_message ( void *  cls,
const struct RevokeMessage rm 
)
static

Handle REVOKE message from client.

Parameters
clsclient who sent the message
rmthe message received

Definition at line 449 of file gnunet-service-revocation.c.

451 {
452  struct GNUNET_SERVICE_Client *client = cls;
453  struct GNUNET_MQ_Envelope *env;
454  struct RevocationResponseMessage *rrm;
455  int ret;
456 
458  "Received REVOKE message from client\n");
459  if (GNUNET_SYSERR == (ret = publicize_rm (rm)))
460  {
461  GNUNET_break_op (0);
463  return;
464  }
465  env = GNUNET_MQ_msg (rrm,
467  rrm->is_valid = htonl ((GNUNET_OK == ret) ? GNUNET_NO : GNUNET_YES);
469  env);
471 }
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
static enum GNUNET_GenericReturnValue publicize_rm(const struct RevokeMessage *rm)
Publicize revocation message.
#define GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE_RESPONSE
Service to client: revocation confirmed.
Key revocation response.
Definition: revocation.h:99
uint32_t is_valid
GNUNET_NO if revocation failed for internal reasons (e.g.
Definition: revocation.h:109

References env, GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE_RESPONSE, GNUNET_MQ_msg, GNUNET_MQ_send(), GNUNET_NO, GNUNET_OK, GNUNET_SERVICE_client_continue(), GNUNET_SERVICE_client_drop(), GNUNET_SERVICE_client_get_mq(), GNUNET_SYSERR, GNUNET_YES, RevocationResponseMessage::is_valid, publicize_rm(), and ret.

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◆ check_p2p_revoke()

static int check_p2p_revoke ( void *  cls,
const struct RevokeMessage rm 
)
static

Definition at line 475 of file gnunet-service-revocation.c.

477 {
478  uint16_t size;
479 
480  size = ntohs (rm->header.size);
481  if (size <= sizeof(struct RevokeMessage))
482  {
483  GNUNET_break (0);
484  return GNUNET_SYSERR;
485  }
486  return GNUNET_OK;
487 
488 }

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

◆ handle_p2p_revoke()

static void handle_p2p_revoke ( void *  cls,
const struct RevokeMessage rm 
)
static

Core handler for flooded revocation messages.

Parameters
clsclosure unused
rmrevocation message

Definition at line 498 of file gnunet-service-revocation.c.

500 {
502  "Received REVOKE message\n");
504  publicize_rm (rm));
505 }

References GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_SYSERR, and publicize_rm().

Referenced by add_revocation().

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◆ add_revocation()

static void add_revocation ( void *  cls,
const struct GNUNET_SETU_Element element,
uint64_t  current_size,
enum GNUNET_SETU_Status  status 
)
static

Callback for set operation results.

Called for each element in the result set. Each element contains a revocation, which we should validate and then add to our revocation list (and set).

Parameters
clsclosure
elementa result element, only valid if status is #GNUNET_SETU_STATUS_OK
current_sizecurrent set size
statussee enum GNUNET_SETU_Status

Definition at line 519 of file gnunet-service-revocation.c.

523 {
524  struct PeerEntry *peer_entry = cls;
525  const struct RevokeMessage *rm;
526 
527  switch (status)
528  {
530  if (element->size != sizeof(struct RevokeMessage))
531  {
532  GNUNET_break_op (0);
533  return;
534  }
536  {
538  gettext_noop (
539  "# unsupported revocations received via set union"),
540  1,
541  GNUNET_NO);
542  return;
543  }
544  rm = element->data;
545  (void) handle_p2p_revoke (NULL,
546  rm);
548  gettext_noop (
549  "# revocation messages received via set union"),
550  1, GNUNET_NO);
551  break;
554  _ ("Error computing revocation set union with %s\n"),
555  GNUNET_i2s (&peer_entry->id));
556  peer_entry->so = NULL;
558  gettext_noop ("# revocation set unions failed"),
559  1,
560  GNUNET_NO);
561  break;
563  peer_entry->so = NULL;
565  gettext_noop (
566  "# revocation set unions completed"),
567  1,
568  GNUNET_NO);
569  break;
570  default:
571  GNUNET_break (0);
572  break;
573  }
574 }
#define gettext_noop(String)
Definition: gettext.h:70
uint16_t status
See PRISM_STATUS_*-constants.
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
static void handle_p2p_revoke(void *cls, const struct RevokeMessage *rm)
Core handler for flooded revocation messages.
@ GNUNET_ERROR_TYPE_WARNING
@ GNUNET_SETU_STATUS_DONE
Success, all elements have been sent (and received).
@ GNUNET_SETU_STATUS_FAILURE
The other peer refused to do the operation with us, or something went wrong.
@ GNUNET_SETU_STATUS_ADD_LOCAL
Element should be added to the result set of the local peer, i.e.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
uint16_t element_type
Application-specific element type.
uint16_t size
Number of bytes in the buffer pointed to by data.
const void * data
Actual data of the element.
struct GNUNET_SETU_OperationHandle * so
Handle to active set union operation (over revocation sets).

References _, GNUNET_SETU_Element::data, GNUNET_SETU_Element::element_type, gettext_noop, GNUNET_BLOCK_TYPE_REVOCATION, GNUNET_break, GNUNET_break_op, GNUNET_ERROR_TYPE_WARNING, GNUNET_i2s(), GNUNET_log, GNUNET_NO, GNUNET_SETU_STATUS_ADD_LOCAL, GNUNET_SETU_STATUS_DONE, GNUNET_SETU_STATUS_FAILURE, GNUNET_STATISTICS_update(), handle_p2p_revoke(), PeerEntry::id, GNUNET_SETU_Element::size, PeerEntry::so, stats, and status.

Referenced by handle_revocation_union_request().

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◆ transmit_task_cb()

static void transmit_task_cb ( void *  cls)
static

The timeout for performing the set union has expired, run the set operation on the revocation certificates.

Parameters
clsNULL

Definition at line 584 of file gnunet-service-revocation.c.

585 {
586  struct PeerEntry *peer_entry = cls;
587 
589  "Starting set exchange with peer `%s'\n",
590  GNUNET_i2s (&peer_entry->id));
591  peer_entry->transmit_task = NULL;
592  GNUNET_assert (NULL == peer_entry->so);
593  peer_entry->so = GNUNET_SETU_prepare (&peer_entry->id,
595  NULL,
596  (struct GNUNET_SETU_Option[]) { { 0 } },
598  peer_entry);
599  if (GNUNET_OK !=
600  GNUNET_SETU_commit (peer_entry->so,
602  {
604  _ ("SET service crashed, terminating revocation service\n"));
606  return;
607  }
608 }
static struct GNUNET_HashCode revocation_set_union_app_id
Our application ID for set union operations.
static void add_revocation(void *cls, const struct GNUNET_SETU_Element *element, uint64_t current_size, enum GNUNET_SETU_Status status)
Callback for set operation results.
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:534
struct GNUNET_SETU_OperationHandle * GNUNET_SETU_prepare(const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_HashCode *app_id, const struct GNUNET_MessageHeader *context_msg, const struct GNUNET_SETU_Option options[], GNUNET_SETU_ResultIterator result_cb, void *result_cls)
Prepare a set operation to be evaluated with another peer.
Definition: setu_api.c:497
int GNUNET_SETU_commit(struct GNUNET_SETU_OperationHandle *oh, struct GNUNET_SETU_Handle *set)
Commit a set to be used with a set operation.
Definition: setu_api.c:851
Option for set operations.
struct GNUNET_SCHEDULER_Task * transmit_task
Tasked used to trigger the set union operation.

References GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_SETU_prepare(), PeerEntry::id, revocation_set_union_app_id, PeerEntry::so, and PeerEntry::transmit_task.

Referenced by handle_core_connect().

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◆ handle_core_connect()

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

Method called whenever a peer connects.

Sets up the PeerEntry and schedules the initial revocation set exchange with this peer.

Parameters
clsclosure
peerpeer identity this notification is about

Definition at line 619 of file gnunet-service-revocation.c.

622 {
623  struct PeerEntry *peer_entry;
624  struct GNUNET_HashCode my_hash;
625  struct GNUNET_HashCode peer_hash;
626 
627  if (0 == GNUNET_memcmp (peer,
628  &my_identity))
629  {
630  return NULL;
631  }
632 
634  "Peer `%s' connected to us\n",
635  GNUNET_i2s (peer));
637  "# peers connected",
638  1,
639  GNUNET_NO);
641  peer);
642  if (NULL != peer_entry)
643  {
644  /* This can happen if "core"'s notification is a tad late
645  and CADET+SET were faster and already produced a
646  #handle_revocation_union_request() for us to deal
647  with. This should be rare, but isn't impossible. */
648  peer_entry->mq = mq;
649  return peer_entry;
650  }
651  peer_entry = new_peer_entry (peer);
652  peer_entry->mq = mq;
654  sizeof(my_identity),
655  &my_hash);
657  sizeof(*peer),
658  &peer_hash);
659  if (0 < GNUNET_CRYPTO_hash_cmp (&my_hash,
660  &peer_hash))
661  {
663  "Starting SET operation with peer `%s'\n",
664  GNUNET_i2s (peer));
665  peer_entry->transmit_task =
668  peer_entry);
669  }
670  return peer_entry;
671 }
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
static void transmit_task_cb(void *cls)
The timeout for performing the set union has expired, run the set operation on the revocation certifi...
static struct GNUNET_PeerIdentity my_identity
The peer identity of this peer.
static struct PeerEntry * new_peer_entry(const struct GNUNET_PeerIdentity *peer)
Create a new PeerEntry and add it to the peers multipeermap.
int GNUNET_CRYPTO_hash_cmp(const struct GNUNET_HashCode *h1, const struct GNUNET_HashCode *h2)
Compare function for HashCodes, producing a total ordering of all hashcodes.
Definition: crypto_hash.c:220
void * GNUNET_CONTAINER_multipeermap_get(const struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key)
Given a key find a value in the map matching the key.
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
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:1241
#define GNUNET_TIME_UNIT_SECONDS
One second.

References GNUNET_CONTAINER_multipeermap_get(), GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_hash_cmp(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_NO, GNUNET_SCHEDULER_add_delayed(), GNUNET_STATISTICS_update(), GNUNET_TIME_UNIT_SECONDS, mq, PeerEntry::mq, my_identity, new_peer_entry(), peer, peers, stats, PeerEntry::transmit_task, and transmit_task_cb().

Referenced by run().

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◆ handle_core_disconnect()

static void handle_core_disconnect ( void *  cls,
const struct GNUNET_PeerIdentity peer,
void *  internal_cls 
)
static

Method called whenever a peer disconnects.

Deletes the PeerEntry and cancels any pending transmission requests to that peer.

Parameters
clsclosure
peerpeer identity this notification is about
internal_clsour struct PeerEntry for this peer

Definition at line 683 of file gnunet-service-revocation.c.

686 {
687  struct PeerEntry *peer_entry = internal_cls;
688 
689  if (0 == GNUNET_memcmp (peer,
690  &my_identity))
691  return;
692  GNUNET_assert (NULL != peer_entry);
694  "Peer `%s' disconnected from us\n",
695  GNUNET_i2s (peer));
698  peer,
699  peer_entry));
700  if (NULL != peer_entry->transmit_task)
701  {
703  peer_entry->transmit_task = NULL;
704  }
705  if (NULL != peer_entry->so)
706  {
707  GNUNET_SETU_operation_cancel (peer_entry->so);
708  peer_entry->so = NULL;
709  }
710  GNUNET_free (peer_entry);
712  "# peers connected",
713  -1,
714  GNUNET_NO);
715 }
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
#define GNUNET_free(ptr)
Wrapper around free.
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:944
void GNUNET_SETU_operation_cancel(struct GNUNET_SETU_OperationHandle *oh)
Cancel the given set operation.
Definition: setu_api.c:320

References GNUNET_assert, GNUNET_CONTAINER_multipeermap_remove(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_i2s(), GNUNET_log, GNUNET_memcmp, GNUNET_NO, GNUNET_SCHEDULER_cancel(), GNUNET_SETU_operation_cancel(), GNUNET_STATISTICS_update(), GNUNET_YES, my_identity, peer, peers, PeerEntry::so, stats, and PeerEntry::transmit_task.

Referenced by run().

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◆ free_entry()

static int free_entry ( void *  cls,
const struct GNUNET_HashCode key,
void *  value 
)
static

Free all values in a hash map.

Parameters
clsNULL
keythe key
valuevalue to free
Returns
GNUNET_OK (continue to iterate)

Definition at line 727 of file gnunet-service-revocation.c.

730 {
731  GNUNET_free (value);
732  return GNUNET_OK;
733 }

References GNUNET_free, GNUNET_OK, and value.

Referenced by shutdown_task().

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◆ shutdown_task()

static void shutdown_task ( void *  cls)
static

Task run during shutdown.

Parameters
clsunused

Definition at line 742 of file gnunet-service-revocation.c.

743 {
744  if (NULL != revocation_set)
745  {
747  revocation_set = NULL;
748  }
749  if (NULL != revocation_union_listen_handle)
750  {
753  }
754  if (NULL != core_api)
755  {
757  core_api = NULL;
758  }
759  if (NULL != stats)
760  {
762  stats = NULL;
763  }
764  if (NULL != peers)
765  {
767  peers = NULL;
768  }
769  if (NULL != revocation_db)
770  {
772  revocation_db = NULL;
773  }
775  &free_entry,
776  NULL);
778 }
static struct GNUNET_SETU_ListenHandle * revocation_union_listen_handle
Handle for us listening to incoming revocation set union requests.
static int free_entry(void *cls, const struct GNUNET_HashCode *key, void *value)
Free all values in a hash map.
static struct GNUNET_CORE_Handle * core_api
Handle to the core service (for flooding)
void GNUNET_CORE_disconnect(struct GNUNET_CORE_Handle *handle)
Disconnect from the core service.
Definition: core_api.c:729
enum GNUNET_GenericReturnValue GNUNET_DISK_file_close(struct GNUNET_DISK_FileHandle *h)
Close an open file.
Definition: disk.c:1305
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MultiHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
void GNUNET_SETU_destroy(struct GNUNET_SETU_Handle *set)
Destroy the set handle, and free all associated resources.
Definition: setu_api.c:471
void GNUNET_SETU_listen_cancel(struct GNUNET_SETU_ListenHandle *lh)
Cancel the given listen operation.
Definition: setu_api.c:749
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).

References core_api, free_entry(), GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multipeermap_destroy(), GNUNET_CORE_disconnect(), GNUNET_DISK_file_close(), GNUNET_NO, GNUNET_SETU_destroy(), GNUNET_SETU_listen_cancel(), GNUNET_STATISTICS_destroy(), peers, revocation_db, revocation_map, revocation_set, revocation_union_listen_handle, and stats.

Referenced by run().

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◆ core_init()

static void core_init ( void *  cls,
const struct GNUNET_PeerIdentity identity 
)
static

Called on core init/fail.

Parameters
clsservice closure
identitythe public identity of this peer

Definition at line 788 of file gnunet-service-revocation.c.

790 {
791  if (NULL == identity)
792  {
794  "Connection to core FAILED!\n");
796  return;
797  }
799 }
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.

References GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_SCHEDULER_shutdown(), identity, and my_identity.

Referenced by run().

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◆ handle_revocation_union_request()

static void handle_revocation_union_request ( void *  cls,
const struct GNUNET_PeerIdentity other_peer,
const struct GNUNET_MessageHeader context_msg,
struct GNUNET_SETU_Request request 
)
static

Called when another peer wants to do a set operation with the local peer.

If a listen error occurs, the 'request' is NULL.

Parameters
clsclosure
other_peerthe other peer
context_msgmessage with application specific information from the other peer
requestrequest from the other peer (never NULL), use GNUNET_SETU_accept() to accept it, otherwise the request will be refused Note that we can't just return value from the listen callback, as it is also necessary to specify the set we want to do the operation with, which sometimes can be derived from the context message. It's necessary to specify the timeout.

Definition at line 818 of file gnunet-service-revocation.c.

822 {
823  struct PeerEntry *peer_entry;
824 
825  if (NULL == request)
826  {
827  GNUNET_break (0);
828  return;
829  }
831  "Received set exchange request from peer `%s'\n",
832  GNUNET_i2s (other_peer));
834  other_peer);
835  if (NULL == peer_entry)
836  {
837  peer_entry = new_peer_entry (other_peer);
838  }
839  if (NULL != peer_entry->so)
840  {
841  GNUNET_break_op (0);
842  return;
843  }
844  peer_entry->so = GNUNET_SETU_accept (request,
845  (struct GNUNET_SETU_Option[]) { { 0 } },
847  peer_entry);
848  if (GNUNET_OK !=
849  GNUNET_SETU_commit (peer_entry->so,
851  {
852  GNUNET_break (0);
854  return;
855  }
856 }
static struct GNUNET_VPN_RedirectionRequest * request
Opaque redirection request handle.
Definition: gnunet-vpn.c:40
struct GNUNET_SETU_OperationHandle * GNUNET_SETU_accept(struct GNUNET_SETU_Request *request, const struct GNUNET_SETU_Option options[], GNUNET_SETU_ResultIterator result_cb, void *result_cls)
Accept a request we got via GNUNET_SETU_listen().
Definition: setu_api.c:769

References add_revocation(), GNUNET_break, GNUNET_break_op, GNUNET_CONTAINER_multipeermap_get(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_OK, GNUNET_SCHEDULER_shutdown(), GNUNET_SETU_accept(), GNUNET_SETU_commit(), new_peer_entry(), peers, request, revocation_set, and PeerEntry::so.

Referenced by run().

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◆ run()

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

Handle network size estimate clients.

Parameters
clsclosure
serverthe initialized server
cconfiguration to use

Definition at line 867 of file gnunet-service-revocation.c.

870 {
871  struct GNUNET_MQ_MessageHandler core_handlers[] = {
872  GNUNET_MQ_hd_var_size (p2p_revoke,
874  struct RevokeMessage,
875  NULL),
877  };
878  char *fn;
879  uint64_t left;
880  struct RevokeMessage *rm;
881  struct GNUNET_HashCode hc;
882  const struct GNUNET_IDENTITY_PublicKey *pk;
883 
884  GNUNET_CRYPTO_hash ("revocation-set-union-application-id",
885  strlen ("revocation-set-union-application-id"),
887  if (GNUNET_OK !=
889  "REVOCATION",
890  "DATABASE",
891  &fn))
892  {
894  "REVOCATION",
895  "DATABASE");
897  return;
898  }
899  cfg = c;
901  GNUNET_NO);
903  NULL);
904  if (GNUNET_OK !=
906  "REVOCATION",
907  "WORKBITS",
909  {
911  "REVOCATION",
912  "WORKBITS");
914  GNUNET_free (fn);
915  return;
916  }
917  if (revocation_work_required >= sizeof(struct GNUNET_HashCode) * 8)
918  {
920  "REVOCATION",
921  "WORKBITS",
922  _ ("Value is too large.\n"));
924  GNUNET_free (fn);
925  return;
926  }
927  if (GNUNET_OK !=
929  "REVOCATION",
930  "EPOCH_DURATION",
931  &epoch_duration))
932  {
934  "REVOCATION",
935  "EPOCH_DURATION");
937  GNUNET_free (fn);
938  return;
939  }
940 
946  NULL);
954  if (NULL == revocation_db)
955  {
957  "REVOCATION",
958  "DATABASE",
959  _ ("Could not open revocation database file!"));
961  GNUNET_free (fn);
962  return;
963  }
964  if (GNUNET_OK !=
966  left = 0;
967  while (left > sizeof(struct RevokeMessage))
968  {
969  rm = GNUNET_new (struct RevokeMessage);
970  if (sizeof(struct RevokeMessage) !=
972  rm,
973  sizeof(struct RevokeMessage)))
974  {
976  "read",
977  fn);
978  GNUNET_free (rm);
980  GNUNET_free (fn);
981  return;
982  }
983  struct GNUNET_REVOCATION_PowP *pow = (struct
984  GNUNET_REVOCATION_PowP *) &rm[1];
985  ssize_t ksize;
986  pk = (const struct GNUNET_IDENTITY_PublicKey *) &pow[1];
988  if (0 > ksize)
989  {
990  GNUNET_break_op (0);
991  GNUNET_free (rm);
992  GNUNET_free (fn);
993  return;
994  }
996  ksize,
997  &hc);
1000  &hc,
1001  rm,
1003  }
1004  GNUNET_free (fn);
1005 
1007  GNUNET_YES);
1008  /* Connect to core service and register core handlers */
1009  core_api = GNUNET_CORE_connect (cfg, /* Main configuration */
1010  NULL, /* Closure passed to functions */
1011  &core_init, /* Call core_init once connected */
1012  &handle_core_connect, /* Handle connects */
1013  &handle_core_disconnect, /* Handle disconnects */
1014  core_handlers); /* Register these handlers */
1015  if (NULL == core_api)
1016  {
1018  return;
1019  }
1020  stats = GNUNET_STATISTICS_create ("revocation",
1021  cfg);
1022 }
static void core_init(void *cls, const struct GNUNET_PeerIdentity *identity)
Called on core init/fail.
static const struct GNUNET_CONFIGURATION_Handle * cfg
Handle to our current configuration.
static void shutdown_task(void *cls)
Task run during shutdown.
static void handle_core_disconnect(void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
Method called whenever a peer disconnects.
static void * handle_core_connect(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a peer connects.
static void handle_revocation_union_request(void *cls, const struct GNUNET_PeerIdentity *other_peer, const struct GNUNET_MessageHeader *context_msg, struct GNUNET_SETU_Request *request)
Called when another peer wants to do a set operation with the local peer.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
enum GNUNET_GenericReturnValue GNUNET_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.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_time(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, struct GNUNET_TIME_Relative *time)
Get a configuration value that should be a relative time.
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:691
struct GNUNET_DISK_FileHandle * GNUNET_DISK_file_open(const char *fn, enum GNUNET_DISK_OpenFlags flags, enum GNUNET_DISK_AccessPermissions perm)
Open a file.
Definition: disk.c:1234
enum GNUNET_GenericReturnValue GNUNET_DISK_file_size(const char *filename, uint64_t *size, int include_symbolic_links, int single_file_mode)
Get the size of the file (or directory) of the given file (in bytes).
Definition: disk.c:221
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:621
@ GNUNET_DISK_OPEN_CREATE
Create file if it doesn't exist.
@ GNUNET_DISK_OPEN_READWRITE
Open the file for both reading and writing.
@ GNUNET_DISK_PERM_USER_READ
Owner can read.
@ GNUNET_DISK_PERM_GROUP_READ
Group can read.
@ GNUNET_DISK_PERM_USER_WRITE
Owner can write.
@ GNUNET_DISK_PERM_OTHER_READ
Everybody can read.
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
void GNUNET_log_config_invalid(enum GNUNET_ErrorType kind, const char *section, const char *option, const char *required)
Log error message about invalid configuration option value.
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received,...
Definition: scheduler.c:1303
struct GNUNET_SETU_Handle * GNUNET_SETU_create(const struct GNUNET_CONFIGURATION_Handle *cfg)
Create an empty set, supporting the specified operation.
Definition: setu_api.c:384
struct GNUNET_SETU_ListenHandle * GNUNET_SETU_listen(const struct GNUNET_CONFIGURATION_Handle *cfg, const struct GNUNET_HashCode *app_id, GNUNET_SETU_ListenCallback listen_cb, void *listen_cls)
Wait for set operation requests for the given application ID.
Definition: setu_api.c:717
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
Message handler for a specific message type.

References _, cfg, core_api, core_init(), epoch_duration, GNUNET_break, GNUNET_break_op, GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONFIGURATION_get_value_number(), GNUNET_CONFIGURATION_get_value_time(), GNUNET_CONTAINER_multihashmap_create(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_create(), GNUNET_CORE_connect(), GNUNET_CRYPTO_hash(), GNUNET_DISK_file_open(), GNUNET_DISK_file_read(), GNUNET_DISK_file_size(), GNUNET_DISK_OPEN_CREATE, GNUNET_DISK_OPEN_READWRITE, GNUNET_DISK_PERM_GROUP_READ, GNUNET_DISK_PERM_OTHER_READ, GNUNET_DISK_PERM_USER_READ, GNUNET_DISK_PERM_USER_WRITE, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_IDENTITY_public_key_get_length(), GNUNET_log_config_invalid(), GNUNET_log_config_missing(), GNUNET_log_strerror_file, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, GNUNET_MQ_handler_end, GNUNET_MQ_hd_var_size, GNUNET_new, GNUNET_NO, GNUNET_OK, GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_shutdown(), GNUNET_SETU_create(), GNUNET_SETU_listen(), GNUNET_STATISTICS_create(), GNUNET_YES, handle_core_connect(), handle_core_disconnect(), handle_revocation_union_request(), peers, pk, GNUNET_REVOCATION_PowP::pow, revocation_db, revocation_map, revocation_set, revocation_set_union_app_id, revocation_union_listen_handle, revocation_work_required, shutdown_task(), and stats.

Here is the call graph for this function:

◆ GNUNET_SERVICE_MAIN()

GNUNET_SERVICE_MAIN ( "revocation"  ,
GNUNET_SERVICE_OPTION_NONE  ,
run,
client_connect_cb,
client_disconnect_cb,
NULL  ,
GNUNET_MQ_hd_var_size(query_message, GNUNET_MESSAGE_TYPE_REVOCATION_QUERY, struct QueryMessage, NULL)  ,
GNUNET_MQ_hd_var_size(revoke_message, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, struct RevokeMessage, NULL)  ,
GNUNET_MQ_handler_end()   
)

Define "main" method using service macro.

Variable Documentation

◆ revocation_set

struct GNUNET_SETU_Handle* revocation_set
static

Set from all revocations known to us.

Definition at line 83 of file gnunet-service-revocation.c.

Referenced by handle_revocation_union_request(), run(), and shutdown_task().

◆ revocation_map

struct GNUNET_CONTAINER_MultiHashMap* revocation_map
static

Hash map with all revoked keys, maps the hash of the public key to the respective struct RevokeMessage.

Definition at line 89 of file gnunet-service-revocation.c.

Referenced by do_flood(), run(), and shutdown_task().

◆ cfg

const struct GNUNET_CONFIGURATION_Handle* cfg
static

Handle to our current configuration.

Definition at line 94 of file gnunet-service-revocation.c.

Referenced by run().

◆ stats

struct GNUNET_STATISTICS_Handle* stats
static

Handle to the statistics service.

Definition at line 99 of file gnunet-service-revocation.c.

Referenced by add_revocation(), handle_core_connect(), handle_core_disconnect(), run(), and shutdown_task().

◆ core_api

struct GNUNET_CORE_Handle* core_api
static

Handle to the core service (for flooding)

Definition at line 104 of file gnunet-service-revocation.c.

Referenced by run(), and shutdown_task().

◆ peers

◆ my_identity

struct GNUNET_PeerIdentity my_identity
static

The peer identity of this peer.

Definition at line 109 of file gnunet-service-revocation.c.

Referenced by core_init(), handle_core_connect(), and handle_core_disconnect().

◆ revocation_db

struct GNUNET_DISK_FileHandle* revocation_db
static

File handle for the revocation database.

Definition at line 119 of file gnunet-service-revocation.c.

Referenced by run(), and shutdown_task().

◆ revocation_union_listen_handle

struct GNUNET_SETU_ListenHandle* revocation_union_listen_handle
static

Handle for us listening to incoming revocation set union requests.

Definition at line 124 of file gnunet-service-revocation.c.

Referenced by run(), and shutdown_task().

◆ revocation_work_required

unsigned long long revocation_work_required
static

Amount of work required (W-bit collisions) for REVOCATION proofs, in collision-bits.

Definition at line 129 of file gnunet-service-revocation.c.

Referenced by run().

◆ epoch_duration

struct GNUNET_TIME_Relative epoch_duration
static

Length of an expiration expoch.

Definition at line 129 of file gnunet-service-revocation.c.

Referenced by run().

◆ revocation_set_union_app_id

struct GNUNET_HashCode revocation_set_union_app_id
static

Our application ID for set union operations.

Must be the same for all (compatible) peers.

Definition at line 129 of file gnunet-service-revocation.c.

Referenced by run(), and transmit_task_cb().