GNUnet 0.22.0
gnunet-service-revocation.c File Reference

key revocation service More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_gnsrecord_lib.h"
#include "gnunet_dht_block_types.h"
#include "gnunet_protocols.h"
#include "gnunet_statistics_service.h"
#include "gnunet_core_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 147 of file gnunet-service-revocation.c.

148{
149 struct PeerEntry *peer_entry;
150
151 peer_entry = GNUNET_new (struct PeerEntry);
152 peer_entry->id = *peer;
155 &peer_entry->id,
156 peer_entry,
158 return peer_entry;
159}
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.
Definition: peer.c:34
struct GNUNET_PeerIdentity id
The identifier itself.
Definition: peer.c:38

References GNUNET_assert, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_put(), GNUNET_new, GNUNET_OK, PeerEntry::id, 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 170 of file gnunet-service-revocation.c.

171{
172 const struct GNUNET_GNSRECORD_PowP *pow
173 = (const struct GNUNET_GNSRECORD_PowP *) &rm[1];
174
175 if (GNUNET_YES !=
177 (unsigned int) revocation_work_required,
179 {
181 "Proof of work invalid!\n");
182 GNUNET_break_op (0);
183 return GNUNET_NO;
184 }
185 return GNUNET_YES;
186}
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.
enum GNUNET_GenericReturnValue GNUNET_GNSRECORD_check_pow(const struct GNUNET_GNSRECORD_PowP *pow, unsigned int matching_bits, struct GNUNET_TIME_Relative epoch_duration)
Check if the given proof-of-work is valid.
#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
Struct for a proof of work as part of the revocation.
uint64_t pow[32]
The PoWs.

References epoch_duration, GNUNET_break_op, GNUNET_ERROR_TYPE_DEBUG, GNUNET_GNSRECORD_check_pow(), GNUNET_log, GNUNET_NO, GNUNET_YES, GNUNET_GNSRECORD_PowP::pow, and revocation_work_required.

Referenced by publicize_rm().

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◆ client_connect_cb()

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

Handle client connecting to the service.

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

Definition at line 198 of file gnunet-service-revocation.c.

201{
202 return client;
203}

◆ 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 214 of file gnunet-service-revocation.c.

217{
218 GNUNET_assert (client == app_cls);
219}

References GNUNET_assert.

◆ check_query_message()

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

Definition at line 223 of file gnunet-service-revocation.c.

225{
226 uint16_t size;
227
228 size = ntohs (qm->header.size);
229 if (size <= sizeof(struct RevokeMessage) ||
230 (size > UINT16_MAX))
231 {
232 GNUNET_break (0);
233 return GNUNET_SYSERR;
234 }
235 return GNUNET_OK;
236
237}
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
@ 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
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 247 of file gnunet-service-revocation.c.

249{
250 struct GNUNET_SERVICE_Client *client = cls;
251 struct GNUNET_CRYPTO_PublicKey zone;
252 struct GNUNET_MQ_Envelope *env;
253 struct QueryResponseMessage *qrm;
254 struct GNUNET_HashCode hc;
255 int res;
256 size_t key_len;
257 size_t read;
258
259 key_len = ntohl (qm->key_len);
260 if ((GNUNET_SYSERR ==
262 &zone, &read)) ||
263 (read != key_len))
264 {
266 "Unable to parse query public key\n");
268 return;
269 }
270 GNUNET_CRYPTO_hash (&qm[1],
271 key_len,
272 &hc);
274 &hc);
276 (GNUNET_NO == res)
277 ? "Received revocation check for valid key `%s' from client\n"
278 : "Received revocation check for revoked key `%s' from client\n",
279 GNUNET_h2s (&hc));
280 env = GNUNET_MQ_msg (qrm,
282 qrm->is_valid = htonl ((GNUNET_YES == res) ? GNUNET_NO : GNUNET_YES);
284 env);
286}
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static char * res
Currently read line or NULL on EOF.
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_CRYPTO_read_public_key_from_buffer(const void *buffer, size_t len, struct GNUNET_CRYPTO_PublicKey *key, size_t *read)
Reads a GNUNET_CRYPTO_PublicKey from a compact buffer.
Definition: crypto_pkey.c:102
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:305
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:78
#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:2377
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2459
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2348
An identity key as per LSD0001.
A 512-bit hashcode.
Handle to a client that is connected to a service.
Definition: service.c:245
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

References env, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_read_public_key_from_buffer(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_h2s(), 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, and revocation_map.

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◆ 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 298 of file gnunet-service-revocation.c.

301{
302 const struct RevokeMessage *rm = cls;
303 struct PeerEntry *pe = value;
304 struct GNUNET_MQ_Envelope *e;
305 struct RevokeMessage *cp;
306
307 if (NULL == pe->mq)
308 return GNUNET_OK; /* peer connected to us via SET,
309 but we have no direct CORE
310 connection for flooding */
311 e = GNUNET_MQ_msg_extra (cp,
312 htonl (rm->pow_size),
314 *cp = *rm;
315 memcpy (&cp[1],
316 &rm[1],
317 htonl (rm->pow_size));
319 "Flooding revocation to `%s'\n",
320 GNUNET_i2s (target));
321 GNUNET_MQ_send (pe->mq,
322 e);
323 return GNUNET_OK;
324}
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:63
#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 GNUNET_ERROR_TYPE_DEBUG, GNUNET_i2s(), GNUNET_log, GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE, GNUNET_MQ_msg_extra, GNUNET_MQ_send(), GNUNET_OK, PeerEntry::mq, RevokeMessage::pow_size, and value.

Referenced by publicize_rm().

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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 337 of file gnunet-service-revocation.c.

338{
339 struct RevokeMessage *cp;
340 struct GNUNET_HashCode hc;
341 struct GNUNET_SETU_Element e;
342 ssize_t pklen;
343 const struct GNUNET_GNSRECORD_PowP *pow
344 = (const struct GNUNET_GNSRECORD_PowP *) &rm[1];
345 const struct GNUNET_CRYPTO_PublicKey *pk
346 = (const struct GNUNET_CRYPTO_PublicKey *) &pow[1];
347
350 if (0 > pklen)
351 {
352 GNUNET_break_op (0);
353 return GNUNET_SYSERR;
354 }
356 pklen,
357 &hc);
358 if (GNUNET_YES ==
360 &hc))
361 {
363 "Duplicate revocation received from peer. Ignored.\n");
364 return GNUNET_OK;
365 }
366 if (GNUNET_OK !=
368 {
369 GNUNET_break_op (0);
370 return GNUNET_SYSERR;
371 }
372 /* write to disk */
373 if (sizeof(struct RevokeMessage) !=
375 rm,
376 sizeof(struct RevokeMessage)))
377 {
379 "write");
380 return GNUNET_NO;
381 }
382 if (GNUNET_OK !=
384 {
386 "sync");
387 return GNUNET_NO;
388 }
389 /* keep copy in memory */
390 cp = (struct RevokeMessage *) GNUNET_copy_message (&rm->header);
393 &hc,
394 cp,
396 /* add to set for future connections */
397 e.size = htons (rm->header.size);
398 e.element_type = GNUNET_BLOCK_TYPE_REVOCATION;
399 e.data = rm;
400 if (GNUNET_OK !=
402 &e,
403 NULL,
404 NULL))
405 {
406 GNUNET_break (0);
407 return GNUNET_OK;
408 }
409 else
410 {
412 "Added revocation info to SET\n");
413 }
414 /* flood to neighbours */
416 &do_flood,
417 cp);
418 return GNUNET_OK;
419}
struct GNUNET_CRYPTO_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:687
enum GNUNET_GenericReturnValue GNUNET_DISK_file_sync(const struct GNUNET_DISK_FileHandle *h)
Write file changes to disk.
Definition: disk.c:1428
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_CRYPTO_public_key_get_length(const struct GNUNET_CRYPTO_PublicKey *key)
Get the compacted length of a GNUNET_CRYPTO_PublicKey.
Definition: crypto_pkey.c:85
#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
@ GNUNET_BLOCK_TYPE_REVOCATION
Block type for a revocation message by which a key is revoked.
Element stored in a set.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_REVOCATION_REVOKE.
Definition: revocation.h:84

References GNUNET_SETU_Element::data, do_flood(), GNUNET_SETU_Element::element_type, GNUNET_BLOCK_TYPE_REVOCATION, GNUNET_break, GNUNET_break_op, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY, GNUNET_CONTAINER_multipeermap_iterate(), GNUNET_copy_message(), GNUNET_CRYPTO_hash(), GNUNET_CRYPTO_public_key_get_length(), GNUNET_DISK_file_sync(), GNUNET_DISK_file_write(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_log_strerror, GNUNET_NO, GNUNET_OK, GNUNET_SETU_add_element(), GNUNET_SYSERR, GNUNET_YES, RevokeMessage::header, peers, pk, GNUNET_GNSRECORD_PowP::pow, revocation_db, revocation_map, revocation_set, GNUNET_MessageHeader::size, GNUNET_SETU_Element::size, and verify_revoke_message().

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 423 of file gnunet-service-revocation.c.

425{
426 uint16_t size;
427
428 size = ntohs (rm->header.size);
429 if (size <= sizeof(struct RevokeMessage) ||
430 (size > UINT16_MAX))
431 {
432 GNUNET_break (0);
433 return GNUNET_SYSERR;
434 }
435 return GNUNET_OK;
436
437}

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 447 of file gnunet-service-revocation.c.

449{
450 struct GNUNET_SERVICE_Client *client = cls;
451 struct GNUNET_MQ_Envelope *env;
452 struct RevocationResponseMessage *rrm;
453 int ret;
454
456 "Received REVOKE message from client\n");
457 if (GNUNET_SYSERR == (ret = publicize_rm (rm)))
458 {
459 GNUNET_break_op (0);
461 return;
462 }
463 env = GNUNET_MQ_msg (rrm,
465 rrm->is_valid = htonl ((GNUNET_OK == ret) ? GNUNET_NO : GNUNET_YES);
467 env);
469}
static int ret
Final status code.
Definition: gnunet-arm.c:93
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 473 of file gnunet-service-revocation.c.

475{
476 uint16_t size;
477
478 size = ntohs (rm->header.size);
479 if (size <= sizeof(struct RevokeMessage))
480 {
481 GNUNET_break (0);
482 return GNUNET_SYSERR;
483 }
484 return GNUNET_OK;
485
486}

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 496 of file gnunet-service-revocation.c.

498{
500 "Received REVOKE message\n");
502 publicize_rm (rm));
503}

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 517 of file gnunet-service-revocation.c.

521{
522 struct PeerEntry *peer_entry = cls;
523 const struct RevokeMessage *rm;
524
525 switch (status)
526 {
528 if (element->size != sizeof(struct RevokeMessage))
529 {
530 GNUNET_break_op (0);
531 return;
532 }
534 {
537 "# unsupported revocations received via set union"),
538 1,
539 GNUNET_NO);
540 return;
541 }
542 rm = element->data;
543 (void) handle_p2p_revoke (NULL,
544 rm);
547 "# revocation messages received via set union"),
548 1, GNUNET_NO);
549 break;
552 _ ("Error computing revocation set union with %s\n"),
553 GNUNET_i2s (&peer_entry->id));
554 peer_entry->so = NULL;
556 gettext_noop ("# revocation set unions failed"),
557 1,
558 GNUNET_NO);
559 break;
561 peer_entry->so = NULL;
564 "# revocation set unions completed"),
565 1,
566 GNUNET_NO);
567 break;
568 default:
569 GNUNET_break (0);
570 break;
571 }
572}
#define gettext_noop(String)
Definition: gettext.h:74
static int status
The program status; 0 for success.
Definition: gnunet-nse.c:39
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:178
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 582 of file gnunet-service-revocation.c.

583{
584 struct PeerEntry *peer_entry = cls;
585
587 "Starting set exchange with peer `%s'\n",
588 GNUNET_i2s (&peer_entry->id));
589 peer_entry->transmit_task = NULL;
590 GNUNET_assert (NULL == peer_entry->so);
591 peer_entry->so = GNUNET_SETU_prepare (&peer_entry->id,
593 NULL,
594 (struct GNUNET_SETU_Option[]) { { 0 } },
596 peer_entry);
597 if (GNUNET_OK !=
598 GNUNET_SETU_commit (peer_entry->so,
600 {
602 _ ("SET service crashed, terminating revocation service\n"));
604 return;
605 }
606}
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:566
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 617 of file gnunet-service-revocation.c.

620{
621 struct PeerEntry *peer_entry;
622 struct GNUNET_HashCode my_hash;
623 struct GNUNET_HashCode peer_hash;
624
625 if (0 == GNUNET_memcmp (peer,
626 &my_identity))
627 {
628 return NULL;
629 }
630
632 "Peer `%s' connected to us\n",
633 GNUNET_i2s (peer));
635 "# peers connected",
636 1,
637 GNUNET_NO);
639 peer);
640 if (NULL != peer_entry)
641 {
642 /* This can happen if "core"'s notification is a tad late
643 and CADET+SET were faster and already produced a
644 #handle_revocation_union_request() for us to deal
645 with. This should be rare, but isn't impossible. */
646 peer_entry->mq = mq;
647 return peer_entry;
648 }
649 peer_entry = new_peer_entry (peer);
650 peer_entry->mq = mq;
652 sizeof(my_identity),
653 &my_hash);
654 GNUNET_CRYPTO_hash (peer,
655 sizeof(*peer),
656 &peer_hash);
657 if (0 < GNUNET_CRYPTO_hash_cmp (&my_hash,
658 &peer_hash))
659 {
661 "Starting SET operation with peer `%s'\n",
662 GNUNET_i2s (peer));
663 peer_entry->transmit_task =
666 peer_entry);
667 }
668 return peer_entry;
669}
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:221
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:1276
#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(), 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 681 of file gnunet-service-revocation.c.

684{
685 struct PeerEntry *peer_entry = internal_cls;
686
687 if (0 == GNUNET_memcmp (peer,
688 &my_identity))
689 return;
690 GNUNET_assert (NULL != peer_entry);
692 "Peer `%s' disconnected from us\n",
693 GNUNET_i2s (peer));
696 peer,
697 peer_entry));
698 if (NULL != peer_entry->transmit_task)
699 {
701 peer_entry->transmit_task = NULL;
702 }
703 if (NULL != peer_entry->so)
704 {
705 GNUNET_SETU_operation_cancel (peer_entry->so);
706 peer_entry->so = NULL;
707 }
708 GNUNET_free (peer_entry);
710 "# peers connected",
711 -1,
712 GNUNET_NO);
713}
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:979
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, 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 725 of file gnunet-service-revocation.c.

728{
730 return GNUNET_OK;
731}

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 740 of file gnunet-service-revocation.c.

741{
742 if (NULL != revocation_set)
743 {
745 revocation_set = NULL;
746 }
748 {
751 }
752 if (NULL != core_api)
753 {
755 core_api = NULL;
756 }
757 if (NULL != stats)
758 {
760 stats = NULL;
761 }
762 if (NULL != peers)
763 {
765 peers = NULL;
766 }
767 if (NULL != revocation_db)
768 {
770 revocation_db = NULL;
771 }
773 &free_entry,
774 NULL);
776}
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:1309
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 786 of file gnunet-service-revocation.c.

788{
789 if (NULL == identity)
790 {
792 "Connection to core FAILED!\n");
794 return;
795 }
797}
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 816 of file gnunet-service-revocation.c.

820{
821 struct PeerEntry *peer_entry;
822
823 if (NULL == request)
824 {
825 GNUNET_break (0);
826 return;
827 }
829 "Received set exchange request from peer `%s'\n",
830 GNUNET_i2s (other_peer));
832 other_peer);
833 if (NULL == peer_entry)
834 {
835 peer_entry = new_peer_entry (other_peer);
836 }
837 if (NULL != peer_entry->so)
838 {
839 GNUNET_break_op (0);
840 return;
841 }
842 peer_entry->so = GNUNET_SETU_accept (request,
843 (struct GNUNET_SETU_Option[]) { { 0 } },
845 peer_entry);
846 if (GNUNET_OK !=
847 GNUNET_SETU_commit (peer_entry->so,
849 {
850 GNUNET_break (0);
852 return;
853 }
854}
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 865 of file gnunet-service-revocation.c.

868{
869 struct GNUNET_MQ_MessageHandler core_handlers[] = {
870 GNUNET_MQ_hd_var_size (p2p_revoke,
872 struct RevokeMessage,
873 NULL),
875 };
876 char *fn;
877 uint64_t left;
878 ssize_t ksize;
879 struct RevokeMessage *rm;
880 struct GNUNET_HashCode hc;
882 const struct GNUNET_CRYPTO_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",
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 pow = (struct GNUNET_GNSRECORD_PowP *) &rm[1];
984 pk = (const struct GNUNET_CRYPTO_PublicKey *) &pow[1];
986 if (0 > ksize)
987 {
988 GNUNET_break_op (0);
989 GNUNET_free (rm);
990 GNUNET_free (fn);
991 return;
992 }
994 ksize,
995 &hc);
998 &hc,
999 rm,
1001 }
1002 GNUNET_free (fn);
1003
1005 GNUNET_YES);
1006 /* Connect to core service and register core handlers */
1007 core_api = GNUNET_CORE_connect (cfg, /* Main configuration */
1008 NULL, /* Closure passed to functions */
1009 &core_init, /* Call core_init once connected */
1010 &handle_core_connect, /* Handle connects */
1011 &handle_core_disconnect, /* Handle disconnects */
1012 core_handlers); /* Register these handlers */
1013 if (NULL == core_api)
1014 {
1016 return;
1017 }
1018 stats = GNUNET_STATISTICS_create ("revocation",
1019 cfg);
1020}
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 * handle_core_connect(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a peer connects.
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_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:1238
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:222
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:623
@ 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:1338
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_CRYPTO_public_key_get_length(), 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_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_GNSRECORD_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 80 of file gnunet-service-revocation.c.

Referenced by handle_revocation_union_request(), publicize_rm(), 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 86 of file gnunet-service-revocation.c.

Referenced by handle_query_message(), publicize_rm(), run(), and shutdown_task().

◆ cfg

const struct GNUNET_CONFIGURATION_Handle* cfg
static

Handle to our current configuration.

Definition at line 91 of file gnunet-service-revocation.c.

Referenced by run().

◆ stats

struct GNUNET_STATISTICS_Handle* stats
static

Handle to the statistics service.

Definition at line 96 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 101 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 111 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 116 of file gnunet-service-revocation.c.

Referenced by publicize_rm(), 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 121 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 126 of file gnunet-service-revocation.c.

Referenced by run(), and verify_revoke_message().

◆ epoch_duration

struct GNUNET_TIME_Relative epoch_duration
static

Length of an expiration expoch.

Definition at line 131 of file gnunet-service-revocation.c.

Referenced by run(), and verify_revoke_message().

◆ 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 137 of file gnunet-service-revocation.c.

Referenced by run(), and transmit_task_cb().