#include "gnunet_util_lib.h"

Include dependency graph for gnunet-service-messenger_message_store.h:

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Data Structures
struct	GNUNET_MESSENGER_MessageEntry

struct	GNUNET_MESSENGER_MessageLink

struct	GNUNET_MESSENGER_MessageStore

Functions
void	init_message_store (struct GNUNET_MESSENGER_MessageStore store, const char directory)
	Initializes a message store as fully empty using a specific directory.

void	clear_message_store (struct GNUNET_MESSENGER_MessageStore *store)
	Clears a message store, wipes its content and deallocates its memory.

void	move_message_store (struct GNUNET_MESSENGER_MessageStore store, const char directory)
	Moves all storage from a message store from its current directory to a given directory.

void	load_message_store (struct GNUNET_MESSENGER_MessageStore *store)
	Loads messages from its directory into a message store.

void	save_message_store (struct GNUNET_MESSENGER_MessageStore *store)
	Saves messages from a message store into its directory.

enum GNUNET_GenericReturnValue	contains_store_message (const struct GNUNET_MESSENGER_MessageStore store, const struct GNUNET_HashCode hash)
	Checks if a message matching a given hash is stored in a message store.

const struct GNUNET_MESSENGER_Message *	get_store_message (struct GNUNET_MESSENGER_MessageStore store, const struct GNUNET_HashCode hash)
	Returns the message from a message store matching a given hash.

const struct GNUNET_MESSENGER_MessageLink *	get_store_message_link (struct GNUNET_MESSENGER_MessageStore store, const struct GNUNET_HashCode hash, enum GNUNET_GenericReturnValue deleted_only)
	Returns the message link from a message store matching a given hash.

const struct GNUNET_HashCode *	get_store_message_epoch (const struct GNUNET_MESSENGER_MessageStore store, const struct GNUNET_HashCode hash)
	Returns the epoch hash of a message from a message store matching a given hash.

enum GNUNET_GenericReturnValue	put_store_message (struct GNUNET_MESSENGER_MessageStore store, const struct GNUNET_HashCode hash, struct GNUNET_MESSENGER_Message *message)
	Stores a message into the message store.

enum GNUNET_GenericReturnValue	delete_store_message (struct GNUNET_MESSENGER_MessageStore store, const struct GNUNET_HashCode hash)
	Deletes a message in the message store.

void	cleanup_store_discourse_messages_before (struct GNUNET_MESSENGER_MessageStore store, const struct GNUNET_ShortHashCode discourse, const struct GNUNET_TIME_Absolute timestamp)
	Cleans up and deletes all discourse messages existing in the message store memory before a certain timestamp.

Function Documentation

◆ init_message_store()

void init_message_store	(	struct GNUNET_MESSENGER_MessageStore *	store,
		const char *	directory
	)

Initializes a message store as fully empty using a specific directory.

Parameters

[out]	store	Message store
[in]	directory	Path to a directory

Definition at line 40 of file gnunet-service-messenger_message_store.c.

{
  GNUNET_assert (store);
 
  store->directory = directory? GNUNET_strdup (directory) : NULL;
 
  store->storage_messages = NULL;
  store->writing_task = NULL;
 
  store->entries = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
  store->messages = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
  store->links = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
  store->discourses = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
  store->epochs = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
 
  store->rewrite_entries = GNUNET_NO;
  store->write_links = GNUNET_NO;
}

Referenced by create_srv_room().

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◆ clear_message_store()

void clear_message_store ( struct GNUNET_MESSENGER_MessageStore * store )

Clears a message store, wipes its content and deallocates its memory.

Parameters

[in,out] store Message store

Definition at line 110 of file gnunet-service-messenger_message_store.c.

{
  GNUNET_assert (store);
 
  if (store->storage_messages)
  {
    GNUNET_DISK_file_close (store->storage_messages);
    store->storage_messages = NULL;
  }
 
  if (store->writing_task)
  {
    GNUNET_SCHEDULER_cancel (store->writing_task);
    store->writing_task = NULL;
  }
 
  GNUNET_CONTAINER_multihashmap_iterate (store->entries,
                                         iterate_destroy_entries, NULL);
  GNUNET_CONTAINER_multihashmap_iterate (store->messages,
                                         iterate_destroy_messages, NULL);
  GNUNET_CONTAINER_multihashmap_iterate (store->links, iterate_destroy_hashs,
                                         NULL);
  GNUNET_CONTAINER_multihashmap_iterate (store->discourses,
                                         iterate_destroy_messages, NULL);
  GNUNET_CONTAINER_multihashmap_iterate (store->epochs, iterate_destroy_hashs,
                                         NULL);
 
  GNUNET_CONTAINER_multihashmap_destroy (store->entries);
  GNUNET_CONTAINER_multihashmap_destroy (store->messages);
  GNUNET_CONTAINER_multihashmap_destroy (store->links);
  GNUNET_CONTAINER_multihashmap_destroy (store->discourses);
  GNUNET_CONTAINER_multihashmap_destroy (store->epochs);
 
  store->entries = NULL;
  store->messages = NULL;
  store->links = NULL;
  store->discourses = NULL;
  store->epochs = NULL;
 
  if (store->directory)
  {
    GNUNET_free (store->directory);
    store->directory = NULL;
  }
}

Referenced by destroy_srv_room().

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◆ move_message_store()

void move_message_store	(	struct GNUNET_MESSENGER_MessageStore *	store,
		const char *	directory
	)

Moves all storage from a message store from its current directory to a given directory.

Parameters

[in,out]	store	Message store
[in]	directory	Path to a directory

Definition at line 158 of file gnunet-service-messenger_message_store.c.

{
  GNUNET_assert ((store) && (directory));
 
  if (store->directory)
  {
    if (0 == strcmp (store->directory, directory))
      return;
 
    if (GNUNET_YES == GNUNET_DISK_directory_test (directory, GNUNET_NO))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Moving message store failed because directory exists already! (%s)\n",
                  directory);
      return;
    }
 
    if (0 != rename (store->directory, directory))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Moving message store failed! (%s -> %s)\n",
                  store->directory, directory);
      return;
    }
 
    GNUNET_free (store->directory);
  }
 
  store->directory = GNUNET_strdup (directory);
}

References GNUNET_MESSENGER_MessageStore::directory, GNUNET_assert, GNUNET_DISK_directory_test(), GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_log, GNUNET_NO, GNUNET_strdup, and GNUNET_YES.

Referenced by load_srv_room(), and save_srv_room().

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◆ load_message_store()

void load_message_store ( struct GNUNET_MESSENGER_MessageStore * store )

Loads messages from its directory into a message store.

Parameters

[out] store Message store

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

{
  enum GNUNET_DISK_AccessPermissions permission;
  char *filename;
 
  GNUNET_assert (store);
 
  if (! store->directory)
    return;
 
  permission = (GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
 
  if (store->storage_messages)
    GNUNET_DISK_file_close (store->storage_messages);
 
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "messages.store");
 
  if (GNUNET_YES == GNUNET_DISK_file_test (filename))
    store->storage_messages = GNUNET_DISK_file_open (filename,
                                                     GNUNET_DISK_OPEN_READWRITE,
                                                     permission);
  else
    store->storage_messages = NULL;
 
  GNUNET_free (filename);
 
  if (! store->storage_messages)
    return;
 
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "entries.store");
 
  if (GNUNET_YES == GNUNET_DISK_file_test (filename))
    load_message_store_entries (store, filename);
 
  GNUNET_free (filename);
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "links.store");
 
  if (GNUNET_YES == GNUNET_DISK_file_test (filename))
    load_message_store_links (store, filename);
 
  GNUNET_free (filename);
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "epochs.store");
 
  if (GNUNET_YES == GNUNET_DISK_file_test (filename))
    load_message_store_epochs (store, filename);
 
  GNUNET_free (filename);
}

References GNUNET_MESSENGER_MessageStore::directory, filename, GNUNET_asprintf(), GNUNET_assert, GNUNET_DISK_file_close(), GNUNET_DISK_file_open(), GNUNET_DISK_file_test(), GNUNET_DISK_OPEN_READWRITE, GNUNET_DISK_PERM_USER_READ, GNUNET_DISK_PERM_USER_WRITE, GNUNET_free, GNUNET_YES, load_message_store_entries(), load_message_store_epochs(), load_message_store_links(), and GNUNET_MESSENGER_MessageStore::storage_messages.

Referenced by load_srv_room().

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◆ save_message_store()

void save_message_store ( struct GNUNET_MESSENGER_MessageStore * store )

Saves messages from a message store into its directory.

Parameters

[in] store Message store

Definition at line 654 of file gnunet-service-messenger_message_store.c.

{
  struct GNUNET_MESSENGER_ClosureMessageSave save;
  enum GNUNET_DISK_AccessPermissions permission;
  char *filename;
 
  GNUNET_assert (store);
 
  if (store->writing_task)
  {
    GNUNET_SCHEDULER_cancel (store->writing_task);
    store->writing_task = NULL;
  }
 
  if (! store->directory)
    return;
 
  permission = (GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
 
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "epochs.store");
 
  save.store = store;
  save.storage = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_WRITE
                                        | GNUNET_DISK_OPEN_CREATE, permission);
 
  GNUNET_free (filename);
 
  if (! save.storage)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "No access to local storage of message epochs!\n");
    goto save_links;
  }
 
  if (GNUNET_SYSERR == GNUNET_DISK_file_seek (save.storage, 0,
                                              GNUNET_DISK_SEEK_SET))
    goto close_epochs;
 
  GNUNET_CONTAINER_multihashmap_iterate (store->epochs, iterate_save_epochs,
                                         &save);
 
close_epochs:
  GNUNET_DISK_file_close (save.storage);
 
save_links:
  if (GNUNET_YES != store->write_links)
    goto save_entries;
 
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "links.store");
 
  save.store = store;
  save.storage = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_WRITE
                                        | GNUNET_DISK_OPEN_CREATE, permission);
 
  GNUNET_free (filename);
 
  if (! save.storage)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "No access to local storage of message links!\n");
    goto save_entries;
  }
 
  if (GNUNET_SYSERR == GNUNET_DISK_file_seek (save.storage, 0,
                                              GNUNET_DISK_SEEK_SET))
    goto close_links;
 
  GNUNET_CONTAINER_multihashmap_iterate (store->links, iterate_save_links,
                                         &save);
  store->write_links = GNUNET_NO;
 
close_links:
  GNUNET_DISK_file_close (save.storage);
 
save_entries:
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "entries.store");
 
  save.store = store;
  save.storage = GNUNET_DISK_file_open (filename, GNUNET_DISK_OPEN_WRITE
                                        | GNUNET_DISK_OPEN_CREATE, permission);
 
  GNUNET_free (filename);
 
  if (! save.storage)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "No access to local storage of message entries!\n");
    return;
  }
 
  if (GNUNET_YES == store->rewrite_entries)
  {
    if (GNUNET_SYSERR == GNUNET_DISK_file_seek (save.storage, 0,
                                                GNUNET_DISK_SEEK_SET))
      goto close_entries;
 
    GNUNET_CONTAINER_multihashmap_iterate (store->entries, iterate_save_entries,
                                           &save);
    store->rewrite_entries = GNUNET_NO;
  }
  else if (GNUNET_SYSERR == GNUNET_DISK_file_seek (save.storage, 0,
                                                   GNUNET_DISK_SEEK_END))
    goto close_entries;
 
  if (store->storage_messages)
    GNUNET_DISK_file_close (store->storage_messages);
 
  GNUNET_asprintf (&filename,
                   "%s%s", store->directory, "messages.store");
 
  store->storage_messages = GNUNET_DISK_file_open (filename,
                                                   GNUNET_DISK_OPEN_READWRITE
                                                   | GNUNET_DISK_OPEN_CREATE,
                                                   permission);
 
  GNUNET_free (filename);
 
  if (store->storage_messages)
  {
    GNUNET_CONTAINER_multihashmap_iterate (store->messages,
                                           iterate_save_messages, &save);
 
    GNUNET_DISK_file_sync (store->storage_messages);
    GNUNET_DISK_file_sync (save.storage);
  }
 
close_entries:
  GNUNET_DISK_file_close (save.storage);
  save.storage = NULL;
}

Referenced by save_srv_room(), and task_save_messages().

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◆ contains_store_message()

enum GNUNET_GenericReturnValue contains_store_message	(	const struct GNUNET_MESSENGER_MessageStore *	store,
		const struct GNUNET_HashCode *	hash
	)

Checks if a message matching a given hash is stored in a message store.

The function returns GNUNET_YES if a match is found, GNUNET_NO otherwise.

The message has not to be loaded from disk into memory for this check!

Parameters

[in]	store	Message store
[in]	hash	Hash of message

Returns: GNUNET_YES on match, otherwise GNUNET_NO

Definition at line 790 of file gnunet-service-messenger_message_store.c.

{
  GNUNET_assert ((store) && (hash));
 
  if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (store->messages,
                                                            hash))
    return GNUNET_YES;
 
  if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (store->discourses,
                                                            hash))
    return GNUNET_YES;
 
  return GNUNET_CONTAINER_multihashmap_contains (store->entries, hash);
}

References GNUNET_MESSENGER_MessageStore::discourses, GNUNET_MESSENGER_MessageStore::entries, GNUNET_assert, GNUNET_CONTAINER_multihashmap_contains(), GNUNET_YES, GNUNET_MESSENGER_MessageStore::messages, and GNUNET_MESSENGER_ClosureMessageSave::store.

Referenced by update_room_message().

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◆ get_store_message()

const struct GNUNET_MESSENGER_Message * get_store_message	(	struct GNUNET_MESSENGER_MessageStore *	store,
		const struct GNUNET_HashCode *	hash
	)

Returns the message from a message store matching a given hash.

If no matching message is found, NULL gets returned.

This function requires the message to be loaded into memory!

See also: contains_store_message()

Parameters

[in,out]	store	Message store
[in]	hash	Hash of message

Returns: Message or NULL

Definition at line 808 of file gnunet-service-messenger_message_store.c.

{
  struct GNUNET_MESSENGER_Message *message;
  const struct GNUNET_MESSENGER_MessageEntry *entry;
  enum GNUNET_GenericReturnValue decoding;
  struct GNUNET_HashCode check;
  char *buffer;
 
  GNUNET_assert ((store) && (hash));
 
  if (GNUNET_is_zero (hash))
    return NULL;
 
  message = GNUNET_CONTAINER_multihashmap_get (store->messages, hash);
 
  if (message)
    return message;
 
  message = GNUNET_CONTAINER_multihashmap_get (store->discourses, hash);
 
  if (message)
    return message;
 
  if (! store->storage_messages)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Local storage of messages is unavailable: %s\n",
                GNUNET_h2s (hash));
    return NULL;
  }
 
  entry = GNUNET_CONTAINER_multihashmap_get (store->entries, hash);
 
  if (! entry)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "No entry in storage for message found: %s\n",
                GNUNET_h2s (hash));
    return NULL;
  }
 
  if (entry->offset != GNUNET_DISK_file_seek (store->storage_messages,
                                              entry->offset,
                                              GNUNET_DISK_SEEK_SET))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Offset for message in local storage invalid: %s\n",
                GNUNET_h2s (hash));
    return NULL;
  }
 
  buffer = GNUNET_malloc (entry->length);
 
  if (! buffer)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Allocation for message data buffer failed: %s\n",
                GNUNET_h2s (hash));
    return NULL;
  }
 
  if ((GNUNET_DISK_file_read (store->storage_messages, buffer, entry->length) !=
       entry->length) ||
      (entry->length < get_message_kind_size (GNUNET_MESSENGER_KIND_UNKNOWN,
                                              GNUNET_YES)))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Reading message from local storage failed: %s\n",
                GNUNET_h2s (hash));
    goto free_buffer;
  }
 
  message = create_message (GNUNET_MESSENGER_KIND_UNKNOWN);
  decoding = decode_message (message, entry->length, buffer,
                             GNUNET_YES, NULL);
 
  hash_message (message, entry->length, buffer, &check);
 
  if ((GNUNET_YES != decoding) || (GNUNET_CRYPTO_hash_cmp (hash, &check) != 0))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Decoding message failed or checksum mismatched: %s\n",
                GNUNET_h2s (hash));
 
    if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (store->entries,
                                                            hash, entry))
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Corrupted entry could not be removed from store: %s\n",
                  GNUNET_h2s (hash));
 
    store->rewrite_entries = GNUNET_YES;
    goto free_message;
  }
 
  if (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
        store->messages, hash, message,
        GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
    goto free_buffer;
 
free_message:
  destroy_message (message);
  message = NULL;
 
free_buffer:
  GNUNET_free (buffer);
  return message;
}

References create_message(), decode_message(), destroy_message(), GNUNET_MESSENGER_MessageStore::discourses, GNUNET_MESSENGER_MessageStore::entries, get_message_kind_size(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_multihashmap_remove(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST, GNUNET_CRYPTO_hash_cmp(), GNUNET_DISK_file_read(), GNUNET_DISK_file_seek(), GNUNET_DISK_SEEK_SET, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_h2s(), GNUNET_is_zero, GNUNET_log, GNUNET_malloc, GNUNET_MESSENGER_KIND_UNKNOWN, GNUNET_OK, GNUNET_YES, hash_message(), GNUNET_MESSENGER_MessageEntry::length, GNUNET_MESSENGER_MessageStore::messages, GNUNET_MESSENGER_MessageEntry::offset, GNUNET_MESSENGER_MessageStore::rewrite_entries, and GNUNET_MESSENGER_MessageStore::storage_messages.

Referenced by check_srv_room_peer_status(), delete_srv_room_message(), delete_store_message(), forward_about_members(), get_store_message_link(), handle_room_messages(), iterate_epoch_session_members(), notify_about_members(), recv_message_info(), request_room_message_step(), traverse_epoch_message(), update_tunnel_last_message(), and verify_tunnel_message().

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◆ get_store_message_link()

const struct GNUNET_MESSENGER_MessageLink * get_store_message_link	(	struct GNUNET_MESSENGER_MessageStore *	store,
		const struct GNUNET_HashCode *	hash,
		enum GNUNET_GenericReturnValue	deleted_only
	)

Returns the message link from a message store matching a given hash.

If the flag is set to GNUNET_YES, only links from deleted messages will be returned or NULL.

Otherwise message links will also returned for messages found in the store under the given hash. The link which will be returned copies link information from the message for temporary usage.

Parameters

[in,out]	store	Message store
[in]	hash	Hash of message
[in]	deleted_only	Flag

Returns: Message link or NULL

Definition at line 919 of file gnunet-service-messenger_message_store.c.

{
  const struct GNUNET_MESSENGER_Message *message;
 
  if (GNUNET_is_zero (hash))
    return NULL;
 
  if (GNUNET_YES == deleted_only)
    goto get_link;
 
  message = get_store_message (store, hash);
 
  if (message)
  {
    static struct GNUNET_MESSENGER_MessageLink link;
 
    GNUNET_memcpy (&(link.first), &(message->header.previous),
                   sizeof(link.first));
 
    link.multiple = GNUNET_MESSENGER_KIND_MERGE == message->header.kind?
                    GNUNET_YES : GNUNET_NO;
 
    if (GNUNET_YES == link.multiple)
      GNUNET_memcpy (&(link.second), &(message->body.merge.previous),
                     sizeof(link.second));
    else
      GNUNET_memcpy (&(link.second), &(message->header.previous),
                     sizeof(link.second));
 
    return &link;
  }
 
get_link:
  return GNUNET_CONTAINER_multihashmap_get (store->links, hash);
}

Referenced by check_member_session_completion(), and request_room_message_step().

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◆ get_store_message_epoch()

const struct GNUNET_HashCode * get_store_message_epoch	(	const struct GNUNET_MESSENGER_MessageStore *	store,
		const struct GNUNET_HashCode *	hash
	)

Returns the epoch hash of a message from a message store matching a given hash.

If no matching message is found, NULL gets returned.

Parameters

[in]	store	Message store
[in]	hash	Hash of message

Returns: Epoch hash or NULL

Definition at line 959 of file gnunet-service-messenger_message_store.c.

{
  struct GNUNET_HashCode *epoch;
 
  GNUNET_assert ((store) && (hash));
 
  epoch = GNUNET_CONTAINER_multihashmap_get (store->epochs, hash);
 
  if (! epoch)
    return hash;
 
  return epoch;
}

References GNUNET_MESSENGER_MessageStore::epochs, GNUNET_assert, and GNUNET_CONTAINER_multihashmap_get().

Referenced by callback_found_message(), handle_room_messages(), iterate_srv_handle_sync_finished(), notify_about_members(), put_store_message(), and sign_srv_room_message().

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◆ put_store_message()

enum GNUNET_GenericReturnValue put_store_message	(	struct GNUNET_MESSENGER_MessageStore *	store,
		const struct GNUNET_HashCode *	hash,
		struct GNUNET_MESSENGER_Message *	message
	)

Stores a message into the message store.

The result indicates if the operation was successful.

Parameters

[in,out]	store	Message store
[in]	hash	Hash of message
[in,out]	message	Message

Returns: GNUNET_OK on success, otherwise GNUNET_NO

Definition at line 1056 of file gnunet-service-messenger_message_store.c.

{
  struct GNUNET_HashCode *epoch;
  struct GNUNET_CONTAINER_MultiHashMap *map;
  enum GNUNET_GenericReturnValue result;
 
  GNUNET_assert ((store) && (hash) && (message));
 
  if (GNUNET_is_zero (hash))
    return GNUNET_SYSERR;
 
  epoch = GNUNET_CONTAINER_multihashmap_get (store->epochs, hash);
 
  if (epoch)
    goto reverse_epoch;
 
  epoch = GNUNET_new (struct GNUNET_HashCode);
 
  if (! epoch)
    goto skip_epoch;
 
  switch (message->header.kind)
  {
  case GNUNET_MESSENGER_KIND_JOIN:
  case GNUNET_MESSENGER_KIND_LEAVE:
    GNUNET_memcpy (epoch, hash, sizeof (struct GNUNET_HashCode));
    break;
  case GNUNET_MESSENGER_KIND_MERGE:
    {
      const struct GNUNET_HashCode *epoch0;
      const struct GNUNET_HashCode *epoch1;
 
      epoch0 = &(message->body.merge.epochs[0]);
      epoch1 = &(message->body.merge.epochs[1]);
 
      if (0 == GNUNET_CRYPTO_hash_cmp (epoch0, epoch1))
        GNUNET_memcpy (epoch, epoch0, sizeof (struct GNUNET_HashCode));
      else
        GNUNET_memcpy (epoch, hash, sizeof (struct GNUNET_HashCode));
 
      break;
    }
  default:
    GNUNET_memcpy (
      epoch,
      get_store_message_epoch (store, &(message->header.previous)),
      sizeof (struct GNUNET_HashCode));
    break;
  }
 
  if (GNUNET_OK != GNUNET_CONTAINER_multihashmap_put (
        store->epochs, hash, epoch,
        GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
  {
    GNUNET_free (epoch);
    goto skip_epoch;
  }
 
reverse_epoch:
  switch (message->header.kind)
  {
  case GNUNET_MESSENGER_KIND_JOIN:
    put_store_message_epoch (
      store,
      &(message->header.previous),
      &(message->body.join.epoch));
    break;
  case GNUNET_MESSENGER_KIND_LEAVE:
    put_store_message_epoch (
      store,
      &(message->header.previous),
      &(message->body.leave.epoch));
    break;
  case GNUNET_MESSENGER_KIND_MERGE:
    put_store_message_epoch (
      store,
      &(message->header.previous),
      &(message->body.merge.epochs[0]));
    put_store_message_epoch (
      store,
      &(message->body.merge.previous),
      &(message->body.merge.epochs[1]));
    break;
  default:
    put_store_message_epoch (
      store,
      &(message->header.previous),
      epoch);
    break;
  }
 
skip_epoch:
  map = store->messages;
 
  if (get_message_discourse (message))
    map = store->discourses;
 
  if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains (map, hash))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Message has already been stored! (%s)\n",
                GNUNET_h2s (hash));
    return GNUNET_SYSERR;
  }
 
  result = GNUNET_CONTAINER_multihashmap_put (
    map, hash, message,
    GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
 
  if ((GNUNET_OK != result) || (map == store->discourses))
    return result;
 
  if (! store->writing_task)
    store->writing_task = GNUNET_SCHEDULER_add_with_priority (
      GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
      task_save_messages,
      store);
 
  return result;
}

Referenced by update_room_message().

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◆ delete_store_message()

enum GNUNET_GenericReturnValue delete_store_message	(	struct GNUNET_MESSENGER_MessageStore *	store,
		const struct GNUNET_HashCode *	hash
	)

Deletes a message in the message store.

It will be removed from disk space and memory. The result indicates if the operation was successful.

Parameters

[in,out]	store	Message store
[in]	hash	Hash of message

Returns: GNUNET_OK on success, GNUNET_SYSERR on failure

Definition at line 1181 of file gnunet-service-messenger_message_store.c.

{
  const struct GNUNET_MESSENGER_MessageEntry *entry;
  const struct GNUNET_MESSENGER_Message *message;
 
  GNUNET_assert ((store) && (hash));
 
  entry = GNUNET_CONTAINER_multihashmap_get (store->entries, hash);
 
  if (! entry)
    goto clear_memory;
 
  message = get_store_message (store, hash);
 
  if (message)
  {
    if (GNUNET_YES == is_epoch_message (message))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Deletion of message is not allowed! (%s)\n",
                  GNUNET_h2s (hash));
      return GNUNET_SYSERR;
    }
 
    add_link (store, hash, message);
  }
 
  if (! store->storage_messages)
    goto clear_entry;
 
  if (entry->offset != GNUNET_DISK_file_seek (store->storage_messages,
                                              entry->offset,
                                              GNUNET_DISK_SEEK_SET))
    return GNUNET_SYSERR;
 
  {
    enum GNUNET_GenericReturnValue result;
    char *clear_buffer;
 
    clear_buffer = GNUNET_malloc (entry->length);
 
    if (! clear_buffer)
      return GNUNET_SYSERR;
 
    GNUNET_CRYPTO_zero_keys (clear_buffer, entry->length);
 
    if ((entry->length != GNUNET_DISK_file_write (store->storage_messages,
                                                  clear_buffer, entry->length))
        ||
        (GNUNET_OK != GNUNET_DISK_file_sync (store->storage_messages)))
      result = GNUNET_SYSERR;
    else
      result = GNUNET_OK;
 
    GNUNET_free (clear_buffer);
 
    if (GNUNET_OK != result)
      return result;
  }
 
clear_entry:
  if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_remove (store->entries, hash,
                                                          entry))
    store->rewrite_entries = GNUNET_YES;
 
clear_memory:
  GNUNET_CONTAINER_multihashmap_get_multiple (store->messages, hash,
                                              iterate_destroy_messages, NULL);
  GNUNET_CONTAINER_multihashmap_remove_all (store->messages, hash);
  return GNUNET_OK;
}

References add_link(), GNUNET_MESSENGER_MessageStore::entries, get_store_message(), GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), GNUNET_CONTAINER_multihashmap_get_multiple(), GNUNET_CONTAINER_multihashmap_remove(), GNUNET_CONTAINER_multihashmap_remove_all(), GNUNET_CRYPTO_zero_keys(), GNUNET_DISK_file_seek(), GNUNET_DISK_file_sync(), GNUNET_DISK_file_write(), GNUNET_DISK_SEEK_SET, GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_h2s(), GNUNET_log, GNUNET_malloc, GNUNET_OK, GNUNET_SYSERR, GNUNET_YES, is_epoch_message(), iterate_destroy_messages(), GNUNET_MESSENGER_MessageEntry::length, GNUNET_MESSENGER_MessageStore::messages, GNUNET_MESSENGER_MessageEntry::offset, result, GNUNET_MESSENGER_MessageStore::rewrite_entries, and GNUNET_MESSENGER_MessageStore::storage_messages.

Referenced by callback_operation().

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◆ cleanup_store_discourse_messages_before()

void cleanup_store_discourse_messages_before	(	struct GNUNET_MESSENGER_MessageStore *	store,
		const struct GNUNET_ShortHashCode *	discourse,
		const struct GNUNET_TIME_Absolute	timestamp
	)

Cleans up and deletes all discourse messages existing in the message store memory before a certain timestamp.

Parameters

[in,out]	store	Message store
[in]	discourse	Hash of discourse
[in]	timestamp	Timestamp

Definition at line 1297 of file gnunet-service-messenger_message_store.c.

{
  struct GNUNET_MESSENGER_ListMessages list;
  struct GNUNET_MESSENGER_CleanupDiscourseMessages cleanup;
 
  GNUNET_assert ((store) && (discourse));
 
  init_list_messages (&list);
 
  cleanup.list = &list;
  cleanup.timestamp = timestamp;
 
  GNUNET_memcpy (&(cleanup.discourse), discourse,
                 sizeof (struct GNUNET_ShortHashCode));
 
  GNUNET_CONTAINER_multihashmap_iterate (store->discourses,
                                         iterate_flag_for_cleanup_discourse_message,
                                         &cleanup);
 
  {
    struct GNUNET_MESSENGER_ListMessage *element;
    for (element = list.head; element; element = element->next)
      if (0 < GNUNET_CONTAINER_multihashmap_remove_all (store->discourses,
                                                        &(element->hash)))
        GNUNET_CONTAINER_multihashmap_remove_all (
          store->epochs, &(element->hash));
  }
 
  clear_list_messages (&list);
}

References cleanup(), clear_list_messages(), GNUNET_MESSENGER_CleanupDiscourseMessages::discourse, GNUNET_MESSENGER_MessageStore::discourses, GNUNET_MESSENGER_MessageStore::epochs, GNUNET_assert, GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multihashmap_remove_all(), GNUNET_memcpy, GNUNET_MESSENGER_ListMessage::hash, init_list_messages(), iterate_flag_for_cleanup_discourse_message(), list, GNUNET_MESSENGER_ListMessage::next, and timestamp().

Referenced by cleanup_srv_room_discourse_messages().

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Data Structures

Functions

Function Documentation

◆ init_message_store()

◆ clear_message_store()

◆ move_message_store()

◆ load_message_store()

◆ save_message_store()

◆ contains_store_message()

◆ get_store_message()

◆ get_store_message_link()

◆ get_store_message_epoch()

◆ put_store_message()

◆ delete_store_message()

◆ cleanup_store_discourse_messages_before()