messenger_api_room.h File Reference

messenger api: client implementation of GNUnet MESSENGER service More...

#include "platform.h"
#include "gnunet_container_lib.h"
#include "gnunet_crypto_lib.h"
#include "gnunet_messenger_service.h"
#include "messenger_api_list_tunnels.h"
#include "messenger_api_contact.h"
#include "messenger_api_message.h"

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Data Structures
struct	GNUNET_MESSENGER_RoomMessageEntry
struct	GNUNET_MESSENGER_Room

Functions
struct GNUNET_MESSENGER_Room *	create_room (struct GNUNET_MESSENGER_Handle *handle, const struct GNUNET_HashCode *key)
	Creates and allocates a new room for a handle with a given key for the client API. More...
void	destroy_room (struct GNUNET_MESSENGER_Room *room)
	Destroys a room and frees its memory fully from the client API. More...
const struct GNUNET_MESSENGER_Message *	get_room_message (const struct GNUNET_MESSENGER_Room *room, const struct GNUNET_HashCode *hash)
	Returns a message locally stored from a map for a given hash in a room. More...
struct GNUNET_MESSENGER_Contact *	get_room_sender (const struct GNUNET_MESSENGER_Room *room, const struct GNUNET_HashCode *hash)
	Returns a messages sender locally stored from a map for a given hash in a room. More...
void	handle_room_message (struct GNUNET_MESSENGER_Room *room, struct GNUNET_MESSENGER_Contact *sender, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
	Handles a message with a given hash in a room for the client API to update members and its information. More...
int	iterate_room_members (struct GNUNET_MESSENGER_Room *room, GNUNET_MESSENGER_MemberCallback callback, void *cls)
	Iterates through all members of a given room to forward each of them to a selected callback with a custom closure. More...

Detailed Description

messenger api: client implementation of GNUnet MESSENGER service

Author

Tobias Frisch

Definition in file messenger_api_room.h.

Function Documentation

create_room()

struct GNUNET_MESSENGER_Room* create_room	(	struct GNUNET_MESSENGER_Handle *	handle,
		const struct GNUNET_HashCode *	key
	)

Creates and allocates a new room for a handle with a given key for the client API.

Parameters

Definition at line 31 of file messenger_api_room.c.

References GNUNET_MESSENGER_Room::contact_id, GNUNET_MESSENGER_Room::entries, GNUNET_assert, GNUNET_CONTAINER_multihashmap_create(), GNUNET_CONTAINER_multishortmap_create(), GNUNET_memcpy, GNUNET_new, GNUNET_NO, handle, GNUNET_MESSENGER_Room::handle, init_list_tunnels(), GNUNET_MESSENGER_Room::key, GNUNET_MESSENGER_Room::members, GNUNET_MESSENGER_Room::messages, and GNUNET_MESSENGER_Room::opened.

{
  GNUNET_assert((handle) && (key));

  struct GNUNET_MESSENGER_Room *room = GNUNET_new(struct GNUNET_MESSENGER_Room);

  room->handle = handle;
  GNUNET_memcpy(&(room->key), key, sizeof(*key));

  room->opened = GNUNET_NO;
  room->contact_id = NULL;

  init_list_tunnels (&(room->entries));

  room->messages = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
  room->members = GNUNET_CONTAINER_multishortmap_create (8, GNUNET_NO);

  return room;
}

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destroy_room()

void destroy_room

(

struct GNUNET_MESSENGER_Room *

room

)

Destroys a room and frees its memory fully from the client API.

Parameters

Definition at line 63 of file messenger_api_room.c.

References clear_list_tunnels(), GNUNET_MESSENGER_Room::contact_id, GNUNET_MESSENGER_Room::entries, GNUNET_assert, GNUNET_CONTAINER_multihashmap_destroy(), GNUNET_CONTAINER_multihashmap_iterate(), GNUNET_CONTAINER_multishortmap_destroy(), GNUNET_free, iterate_destroy_message(), GNUNET_MESSENGER_Room::members, and GNUNET_MESSENGER_Room::messages.

{
  GNUNET_assert(room);

  clear_list_tunnels (&(room->entries));

  if (room->messages)
  {
    GNUNET_CONTAINER_multihashmap_iterate (room->messages, iterate_destroy_message, NULL);

    GNUNET_CONTAINER_multihashmap_destroy (room->messages);
  }

  if (room->members)
    GNUNET_CONTAINER_multishortmap_destroy (room->members);

  if (room->contact_id)
    GNUNET_free(room->contact_id);

  GNUNET_free(room);
}

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get_room_message()

const struct GNUNET_MESSENGER_Message* get_room_message	(	const struct GNUNET_MESSENGER_Room *	room,
		const struct GNUNET_HashCode *	hash
	)

Returns a message locally stored from a map for a given hash in a room.

If no matching message is found, NULL gets returned.

Parameters

[in]	room	Room
[in]	hash	Hash of message

Returns

Message or NULL

Definition at line 86 of file messenger_api_room.c.

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), GNUNET_MESSENGER_RoomMessageEntry::message, and GNUNET_MESSENGER_Room::messages.

{
  GNUNET_assert((room) && (hash));

  struct GNUNET_MESSENGER_RoomMessageEntry *entry = GNUNET_CONTAINER_multihashmap_get (
      room->messages, hash
  );

  return (entry? entry->message : NULL);
}

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get_room_sender()

struct GNUNET_MESSENGER_Contact* get_room_sender	(	const struct GNUNET_MESSENGER_Room *	room,
		const struct GNUNET_HashCode *	hash
	)

Returns a messages sender locally stored from a map for a given hash in a room.

If no matching message is found, NULL gets returned.

Parameters

[in]	room	Room
[in]	hash	Hash of message

Returns

Contact of sender or NULL

Definition at line 98 of file messenger_api_room.c.

References GNUNET_assert, GNUNET_CONTAINER_multihashmap_get(), GNUNET_MESSENGER_Room::messages, and GNUNET_MESSENGER_RoomMessageEntry::sender.

Referenced by GNUNET_MESSENGER_get_sender().

{
  GNUNET_assert((room) && (hash));

  struct GNUNET_MESSENGER_RoomMessageEntry *entry = GNUNET_CONTAINER_multihashmap_get (
      room->messages, hash
  );

  return (entry? entry->sender : NULL);
}

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handle_room_message()

void handle_room_message	(	struct GNUNET_MESSENGER_Room *	room,
		struct GNUNET_MESSENGER_Contact *	sender,
		const struct GNUNET_MESSENGER_Message *	message,
		const struct GNUNET_HashCode *	hash
	)

Handles a message with a given hash in a room for the client API to update members and its information.

The function also stores the message in map locally for access afterwards.

Parameters

Definition at line 220 of file messenger_api_room.c.

References copy_message(), destroy_message(), GNUNET_CONTAINER_multihashmap_contains(), GNUNET_CONTAINER_multihashmap_put(), GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST, GNUNET_free, GNUNET_MESSENGER_KIND_DELETE, GNUNET_MESSENGER_KIND_ID, GNUNET_MESSENGER_KIND_JOIN, GNUNET_MESSENGER_KIND_KEY, GNUNET_MESSENGER_KIND_LEAVE, GNUNET_MESSENGER_KIND_MISS, GNUNET_MESSENGER_KIND_NAME, GNUNET_new, GNUNET_NO, GNUNET_OK, handle_delete_message(), handle_id_message(), handle_join_message(), handle_key_message(), handle_leave_message(), handle_miss_message(), handle_name_message(), GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_RoomMessageEntry::message, GNUNET_MESSENGER_Room::messages, and GNUNET_MESSENGER_RoomMessageEntry::sender.

Referenced by handle_recv_message().

{
  if (GNUNET_NO != GNUNET_CONTAINER_multihashmap_contains (room->messages, hash))
    return;

  switch (message->header.kind)
  {
  case GNUNET_MESSENGER_KIND_JOIN:
    handle_join_message (room, sender, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_LEAVE:
    handle_leave_message (room, sender, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_NAME:
    handle_name_message (room, sender, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_KEY:
    handle_key_message (room, sender, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_ID:
    handle_id_message (room, sender, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_MISS:
    handle_miss_message (room, sender, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_DELETE:
    handle_delete_message (room, sender, message, hash);
    break;
  default:
    break;
  }

  struct GNUNET_MESSENGER_RoomMessageEntry *entry = GNUNET_new(struct GNUNET_MESSENGER_RoomMessageEntry);

  if (!entry)
    return;

  entry->sender = sender;
  entry->message = copy_message (message);

  if (GNUNET_OK != GNUNET_CONTAINER_multihashmap_put (room->messages, hash, entry,
                                                      GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
  {
    destroy_message (entry->message);
    GNUNET_free(entry);
  }
}

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iterate_room_members()

int iterate_room_members	(	struct GNUNET_MESSENGER_Room *	room,
		GNUNET_MESSENGER_MemberCallback	callback,
		void *	cls
	)

Iterates through all members of a given room to forward each of them to a selected callback with a custom closure.

Parameters

Definition at line 286 of file messenger_api_room.c.

References GNUNET_MESSENGER_MemberCall::callback, GNUNET_MESSENGER_MemberCall::cls, GNUNET_assert, GNUNET_CONTAINER_multishortmap_iterate(), iterate_local_members(), GNUNET_MESSENGER_Room::members, and GNUNET_MESSENGER_MemberCall::room.

Referenced by GNUNET_MESSENGER_iterate_members().

{
  GNUNET_assert(room);

  if (!callback)
    return GNUNET_CONTAINER_multishortmap_iterate(room->members, NULL, NULL);

  struct GNUNET_MESSENGER_MemberCall call;

  call.room = room;
  call.callback = callback;
  call.cls = cls;

  GNUNET_assert(callback);

  return GNUNET_CONTAINER_multishortmap_iterate(room->members, iterate_local_members, &call);
}

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