gnunet-service-messenger_tunnel.c File Reference

GNUnet MESSENGER service. More...

#include "gnunet-service-messenger_tunnel.h"
#include "gnunet-service-messenger_handle.h"
#include "gnunet-service-messenger_message_recv.h"
#include "gnunet-service-messenger_message_store.h"
#include "gnunet-service-messenger_operation_store.h"
#include "gnunet-service-messenger_operation.h"
#include "messenger_api_util.h"

Include dependency graph for gnunet-service-messenger_tunnel.c:

Go to the source code of this file.

Data Structures
struct	GNUNET_MESSENGER_MessageSent

Functions
struct GNUNET_MESSENGER_SrvTunnel *	create_tunnel (struct GNUNET_MESSENGER_SrvRoom *room, const struct GNUNET_PeerIdentity *door)
	Creates and allocates a tunnel of a room to a specific peer identity (called door). More...
void	destroy_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel)
	Destroys a tunnel and frees its memory fully. More...
void	bind_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_CADET_Channel *channel)
	Binds a CADET channel to a tunnel and replaces its channel the tunnel is currently bound to if necessary. More...
void	callback_room_disconnect (struct GNUNET_MESSENGER_SrvRoom *room, void *cls)
void	callback_tunnel_disconnect (void *cls, const struct GNUNET_CADET_Channel *channel)
int	callback_verify_room_message (struct GNUNET_MESSENGER_SrvRoom *room, void *cls, struct GNUNET_MESSENGER_Message *message, struct GNUNET_HashCode *hash)
int	check_tunnel_message (void *cls, const struct GNUNET_MessageHeader *header)
int	update_room_message (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
void	callback_room_handle_message (struct GNUNET_MESSENGER_SrvRoom *room, struct GNUNET_MESSENGER_SrvHandle *handle, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
static void	update_tunnel_last_message (struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_HashCode *hash)
void	handle_tunnel_message (void *cls, const struct GNUNET_MessageHeader *header)
int	connect_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel)
	Tries to connect a tunnel by creating a new CADET channel and binding it. More...
void	disconnect_tunnel (struct GNUNET_MESSENGER_SrvTunnel *tunnel)
	Disconnects and unbinds a channel from a tunnel. More...
int	is_tunnel_connected (const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
	Returns the status of a currently bound channel of a tunnel. More...
static void	callback_tunnel_sent (void *cls)
void	send_tunnel_envelope (struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_MQ_Envelope *env, const struct GNUNET_HashCode *hash)
	Sends an envelope containing a message with a given hash through a tunnel. More...
int	send_tunnel_message (struct GNUNET_MESSENGER_SrvTunnel *tunnel, void *handle, struct GNUNET_MESSENGER_Message *message)
	Sends a message by packing it automatically into an envelope and passing it through the tunnel. More...
void	forward_tunnel_message (struct GNUNET_MESSENGER_SrvTunnel *tunnel, const struct GNUNET_MESSENGER_Message *message, const struct GNUNET_HashCode *hash)
	Forwards a given message with a known hash through a tunnel. More...
const struct GNUNET_HashCode *	get_tunnel_peer_message (const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
	Returns the hash of the latest peer message published through a given tunnel and matching the tunnels peer identity. More...
void	get_tunnel_peer_identity (const struct GNUNET_MESSENGER_SrvTunnel *tunnel, struct GNUNET_PeerIdentity *peer)
	Writes the peer identity of the peer connected via tunnel to this peer into the peer parameter. More...
uint32_t	get_tunnel_messenger_version (const struct GNUNET_MESSENGER_SrvTunnel *tunnel)
	Returns the current messenger version the peer connected via a given tunnel has reported to be using if it was compatible during updating. More...
int	update_tunnel_messenger_version (struct GNUNET_MESSENGER_SrvTunnel *tunnel, uint32_t version)
	Updates the messenger version of the tunnel to a given version if it is compatible to the running peer of the service. More...

Detailed Description

GNUnet MESSENGER service.

Author

Tobias Frisch

Definition in file gnunet-service-messenger_tunnel.c.

Function Documentation

create_tunnel()

struct GNUNET_MESSENGER_SrvTunnel* create_tunnel	(	struct GNUNET_MESSENGER_SrvRoom *	room,
		const struct GNUNET_PeerIdentity *	door
	)

Creates and allocates a tunnel of a room to a specific peer identity (called door).

Parameters

	[in/out]	room Room
[in]	door	Peer identity

Returns

New tunnel

Definition at line 36 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert((room) && (door));
 
  struct GNUNET_MESSENGER_SrvTunnel *tunnel = GNUNET_new(struct GNUNET_MESSENGER_SrvTunnel);
 
  tunnel->room = room;
  tunnel->channel = NULL;
 
  tunnel->peer = GNUNET_PEER_intern (door);
 
  tunnel->messenger_version = 0;
 
  tunnel->peer_message = NULL;
 
  init_message_state(&(tunnel->state));
 
  return tunnel;
}

References GNUNET_MESSENGER_SrvTunnel::channel, GNUNET_assert, GNUNET_new, GNUNET_PEER_intern(), init_message_state(), GNUNET_MESSENGER_SrvTunnel::messenger_version, GNUNET_MESSENGER_SrvTunnel::peer, GNUNET_MESSENGER_SrvTunnel::peer_message, GNUNET_MESSENGER_SrvTunnel::room, and GNUNET_MESSENGER_SrvTunnel::state.

Referenced by callback_room_connect(), and enter_room_at().

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destroy_tunnel()

void destroy_tunnel

(

struct GNUNET_MESSENGER_SrvTunnel *

tunnel

)

Destroys a tunnel and frees its memory fully.

Parameters

[in/out]

tunnel

Definition at line 58 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  if (tunnel->channel)
    GNUNET_CADET_channel_destroy (tunnel->channel);
 
  GNUNET_PEER_change_rc (tunnel->peer, -1);
 
  if (tunnel->peer_message)
    GNUNET_free(tunnel->peer_message);
 
  clear_message_state(&(tunnel->state));
 
  GNUNET_free(tunnel);
}

References GNUNET_MESSENGER_SrvTunnel::channel, clear_message_state(), GNUNET_assert, GNUNET_CADET_channel_destroy(), GNUNET_free, GNUNET_PEER_change_rc(), GNUNET_MESSENGER_SrvTunnel::peer, GNUNET_MESSENGER_SrvTunnel::peer_message, and GNUNET_MESSENGER_SrvTunnel::state.

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bind_tunnel()

void bind_tunnel	(	struct GNUNET_MESSENGER_SrvTunnel *	tunnel,
		struct GNUNET_CADET_Channel *	channel
	)

Binds a CADET channel to a tunnel and replaces its channel the tunnel is currently bound to if necessary.

Parameters

[in/out]	tunnel Tunnel
[in/out]	channel CADET channel

Definition at line 76 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  if (tunnel->channel)
    delayed_disconnect_channel (tunnel->channel);
 
  tunnel->channel = channel;
}

References GNUNET_MESSENGER_SrvTunnel::channel, delayed_disconnect_channel(), and GNUNET_assert.

Referenced by callback_room_connect().

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callback_room_disconnect()

void callback_room_disconnect	(	struct GNUNET_MESSENGER_SrvRoom *	room,
		void *	cls
	)

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

{
  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
 
  if (!room->host)
    return;
 
  struct GNUNET_PeerIdentity identity;
  get_tunnel_peer_identity(tunnel, &identity);
 
  if ((GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove (room->tunnels, &identity, tunnel)) ||
      (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains(room->tunnels, &identity)))
    return;
 
  if (GNUNET_YES == contains_list_tunnels (&(room->basement), &identity))
    send_room_message (room, room->host, create_message_miss (&identity));
}

References GNUNET_MESSENGER_SrvRoom::basement, contains_list_tunnels(), create_message_miss(), get_tunnel_peer_identity(), GNUNET_CONTAINER_multipeermap_contains(), GNUNET_CONTAINER_multipeermap_remove(), GNUNET_YES, GNUNET_MESSENGER_SrvRoom::host, identity, GNUNET_MESSENGER_SrvTunnel::room, send_room_message(), and GNUNET_MESSENGER_SrvRoom::tunnels.

Referenced by callback_tunnel_disconnect().

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callback_tunnel_disconnect()

void callback_tunnel_disconnect	(	void *	cls,
		const struct GNUNET_CADET_Channel *	channel
	)

Definition at line 92 of file gnunet-service-messenger_tunnel.c.

{
  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
 
  if (tunnel)
  {
    tunnel->channel = NULL;
 
    callback_room_disconnect (tunnel->room, cls);
  }
}

References callback_room_disconnect(), GNUNET_MESSENGER_SrvTunnel::channel, and GNUNET_MESSENGER_SrvTunnel::room.

Referenced by connect_tunnel(), and open_room().

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callback_verify_room_message()

int callback_verify_room_message	(	struct GNUNET_MESSENGER_SrvRoom *	room,
		void *	cls,
		struct GNUNET_MESSENGER_Message *	message,
		struct GNUNET_HashCode *	hash
	)

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

{
  if (GNUNET_MESSENGER_KIND_UNKNOWN == message->header.kind)
  {
    GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Kind is unknown! (%d)\n", message->header.kind);
    return GNUNET_SYSERR;
  }
 
  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
 
  const struct GNUNET_MESSENGER_Message *previous = get_store_message(message_store, &(message->header.previous));
 
  if (!previous)
    goto skip_time_comparison;
 
  struct GNUNET_TIME_Absolute timestamp = GNUNET_TIME_absolute_ntoh(message->header.timestamp);
  struct GNUNET_TIME_Absolute last = GNUNET_TIME_absolute_ntoh(previous->header.timestamp);
 
  if (GNUNET_TIME_relative_get_zero_().rel_value_us != GNUNET_TIME_absolute_get_difference(timestamp, last).rel_value_us)
  {
    GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Message error: Timestamp does not check out!\n");
    return GNUNET_SYSERR;
  }
 
skip_time_comparison:
  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Receiving message of kind: %s!\n",
             GNUNET_MESSENGER_name_of_kind(message->header.kind));
 
  return GNUNET_OK;
}

References get_room_message_store(), get_store_message(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_log, GNUNET_MESSENGER_KIND_UNKNOWN, GNUNET_MESSENGER_name_of_kind(), GNUNET_OK, GNUNET_SYSERR, GNUNET_TIME_absolute_get_difference(), GNUNET_TIME_absolute_ntoh(), GNUNET_TIME_relative_get_zero_(), GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_MessageHeader::previous, and GNUNET_MESSENGER_MessageHeader::timestamp.

Referenced by check_tunnel_message().

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check_tunnel_message()

int check_tunnel_message	(	void *	cls,
		const struct GNUNET_MessageHeader *	header
	)

Definition at line 112 of file gnunet-service-messenger_tunnel.c.

{
  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
 
  if (!tunnel)
    return GNUNET_SYSERR;
 
  const uint16_t length = ntohs (header->size) - sizeof(*header);
  const char *buffer = (const char*) &header[1];
 
  struct GNUNET_MESSENGER_Message message;
 
  if (length < get_message_kind_size(GNUNET_MESSENGER_KIND_UNKNOWN))
  {
    GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Tunnel error: Message too short! (%d)\n", length);
    return GNUNET_SYSERR;
  }
 
  uint16_t padding = 0;
 
  if (GNUNET_YES != decode_message (&message, length, buffer, GNUNET_YES, &padding))
  {
    GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Tunnel error: Decoding failed!\n");
    return GNUNET_SYSERR;
  }
 
  struct GNUNET_HashCode hash;
  hash_message (&message, length - padding, buffer, &hash);
 
  return callback_verify_room_message (tunnel->room, cls, &message, &hash);
}

References callback_verify_room_message(), decode_message(), get_message_kind_size(), GNUNET_ERROR_TYPE_WARNING, GNUNET_log, GNUNET_MESSENGER_KIND_UNKNOWN, GNUNET_SYSERR, GNUNET_YES, hash_message(), GNUNET_MESSENGER_SrvTunnel::room, and GNUNET_MessageHeader::size.

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update_room_message()

int update_room_message	(	struct GNUNET_MESSENGER_SrvRoom *	room,
		struct GNUNET_MESSENGER_Message *	message,
		const struct GNUNET_HashCode *	hash
	)

Definition at line 990 of file gnunet-service-messenger_room.c.

{
  GNUNET_assert((room) && (message) && (hash));
 
  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(room);
 
  const int requested = (GNUNET_MESSENGER_OP_REQUEST == get_store_operation_type(operation_store, hash)?
      GNUNET_YES : GNUNET_NO
  );
 
  if (GNUNET_YES == requested)
    cancel_store_operation(operation_store, hash);
 
  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(room);
 
  const struct GNUNET_MESSENGER_Message *old_message = get_store_message (message_store, hash);
 
  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle a message in room (%s).\n", GNUNET_h2s (get_room_key(room)));
 
  if ((old_message) || (GNUNET_OK != put_store_message (message_store, hash, message)))
  {
    if (old_message != message)
      destroy_message(message);
 
    GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Duplicate message got dropped!\n");
    return GNUNET_NO;
  }
 
  update_message_state(&(room->state), requested, message, hash);
 
  if ((GNUNET_YES == requested) ||
      (GNUNET_MESSENGER_KIND_INFO == message->header.kind) ||
      (GNUNET_MESSENGER_KIND_REQUEST == message->header.kind))
    return GNUNET_YES;
 
  if ((GNUNET_MESSENGER_KIND_MERGE == message->header.kind) &&
      (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->body.merge.previous))))
    cancel_store_operation(operation_store, &(message->body.merge.previous));
 
  if (GNUNET_MESSENGER_OP_MERGE == get_store_operation_type(operation_store, &(message->header.previous)))
    cancel_store_operation(operation_store, &(message->header.previous));
 
  return GNUNET_YES;
}

References GNUNET_MESSENGER_Message::body, cancel_store_operation(), destroy_message(), get_room_key(), get_room_message_store(), get_room_operation_store(), get_store_message(), get_store_operation_type(), GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_KIND_INFO, GNUNET_MESSENGER_KIND_MERGE, GNUNET_MESSENGER_KIND_REQUEST, GNUNET_MESSENGER_OP_MERGE, GNUNET_MESSENGER_OP_REQUEST, GNUNET_NO, GNUNET_OK, GNUNET_YES, GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_MessageBody::merge, GNUNET_MESSENGER_MessageMerge::previous, GNUNET_MESSENGER_MessageHeader::previous, put_store_message(), GNUNET_MESSENGER_OperationStore::room, GNUNET_MESSENGER_SrvRoom::state, and update_message_state().

Referenced by handle_tunnel_message(), and send_room_message().

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callback_room_handle_message()

void callback_room_handle_message	(	struct GNUNET_MESSENGER_SrvRoom *	room,
		struct GNUNET_MESSENGER_SrvHandle *	handle,
		const struct GNUNET_MESSENGER_Message *	message,
		const struct GNUNET_HashCode *	hash
	)

Definition at line 1082 of file gnunet-service-messenger_room.c.

{
  struct GNUNET_MESSENGER_MemberStore *member_store = get_room_member_store(room);
  struct GNUNET_MESSENGER_Member *member = get_store_member_of(member_store, message);
 
  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Callback for message (%s)\n", GNUNET_h2s (hash));
 
  if (!member)
  {
    GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Member is missing!\n");
    return;
  }
 
  struct GNUNET_MESSENGER_MemberSession *session = get_member_session_of(member, message, hash);
 
  if (!session)
  {
    GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Message handling dropped: Session is missing!\n");
    return;
  }
 
  struct GNUNET_MESSENGER_MemberUpdate update;
  update.message = message;
  update.hash = hash;
 
  update.head = NULL;
  update.tail = NULL;
 
  iterate_store_members(member_store, iterate_update_member_sessions, &update);
 
  while (update.head)
  {
    struct GNUNET_MESSENGER_MemberSessionCompletion *element = update.head;
 
    remove_room_member_session (room, element->session);
 
    GNUNET_CONTAINER_DLL_remove(update.head, update.tail, element);
    GNUNET_free (element);
  }
 
  const int start_handle = room->handling.head ? GNUNET_NO : GNUNET_YES;
 
  add_to_list_messages (&(room->handling), hash);
 
  switch (message->header.kind)
  {
  case GNUNET_MESSENGER_KIND_JOIN:
    handle_message_join (room, session, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_LEAVE:
    handle_message_leave (room, session, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_NAME:
    handle_message_name (room, session, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_KEY:
    handle_message_key (room, session, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_PEER:
    handle_message_peer (room, session, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_ID:
    handle_message_id (room, session, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_MISS:
    handle_message_miss (room, session, message, hash);
    break;
  case GNUNET_MESSENGER_KIND_DELETE:
    handle_message_delete (room, session, message, hash);
    break;
  default:
    break;
  }
 
  if (GNUNET_YES == start_handle)
    handle_room_messages (room);
}

References add_to_list_messages(), get_member_session_of(), get_room_member_store(), get_store_member_of(), GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_h2s(), GNUNET_log, 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_MESSENGER_KIND_PEER, GNUNET_NO, GNUNET_YES, handle_message_delete(), handle_message_id(), handle_message_join(), handle_message_key(), handle_message_leave(), handle_message_miss(), handle_message_name(), handle_message_peer(), handle_room_messages(), GNUNET_MESSENGER_SrvRoom::handling, GNUNET_MESSENGER_MemberUpdate::hash, GNUNET_MESSENGER_ListMessages::head, GNUNET_MESSENGER_MemberUpdate::head, GNUNET_MESSENGER_Message::header, iterate_store_members(), iterate_update_member_sessions(), GNUNET_MESSENGER_MessageHeader::kind, GNUNET_MESSENGER_MemberSession::member, GNUNET_MESSENGER_MemberUpdate::message, remove_room_member_session(), GNUNET_MESSENGER_MemberStore::room, GNUNET_MESSENGER_MemberSessionCompletion::session, and GNUNET_MESSENGER_MemberUpdate::tail.

Referenced by handle_tunnel_message(), and send_room_message().

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update_tunnel_last_message()

static void update_tunnel_last_message ( struct GNUNET_MESSENGER_SrvTunnel *  tunnel, const struct GNUNET_HashCode *  hash  )

static

Definition at line 157 of file gnunet-service-messenger_tunnel.c.

{
  struct GNUNET_MESSENGER_OperationStore *operation_store = get_room_operation_store(tunnel->room);
 
  const int requested = (GNUNET_MESSENGER_OP_REQUEST == get_store_operation_type(operation_store, hash)?
      GNUNET_YES : GNUNET_NO
  );
 
  struct GNUNET_MESSENGER_MessageStore *message_store = get_room_message_store(tunnel->room);
 
  const struct GNUNET_MESSENGER_Message *message = get_store_message(message_store, hash);
 
  if (message)
    update_message_state(&(tunnel->state), requested, message, hash);
}

References get_room_message_store(), get_room_operation_store(), get_store_message(), get_store_operation_type(), GNUNET_MESSENGER_OP_REQUEST, GNUNET_NO, GNUNET_YES, GNUNET_MESSENGER_SrvTunnel::room, GNUNET_MESSENGER_SrvTunnel::state, and update_message_state().

Referenced by callback_tunnel_sent(), and handle_tunnel_message().

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handle_tunnel_message()

void handle_tunnel_message	(	void *	cls,
		const struct GNUNET_MessageHeader *	header
	)

Definition at line 175 of file gnunet-service-messenger_tunnel.c.

{
  struct GNUNET_MESSENGER_SrvTunnel *tunnel = cls;
 
  const uint16_t length = ntohs (header->size) - sizeof(*header);
  const char *buffer = (const char*) &header[1];
 
  struct GNUNET_MESSENGER_Message message;
  struct GNUNET_HashCode hash;
 
  uint16_t padding = 0;
 
  decode_message (&message, length, buffer, GNUNET_YES, &padding);
  hash_message (&message, length - padding, buffer, &hash);
 
  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Got message of kind: %s!\n",
             GNUNET_MESSENGER_name_of_kind(message.header.kind));
 
  if (!tunnel)
    return;
 
  const int new_message = update_room_message (
      tunnel->room, copy_message (&message), &hash
  );
 
  if (GNUNET_YES != new_message)
    goto receive_done;
 
  update_tunnel_last_message (tunnel, &hash);
 
  int forward_message = GNUNET_YES;
 
  switch (message.header.kind)
  {
  case GNUNET_MESSENGER_KIND_INFO:
    forward_message = recv_message_info (tunnel->room, tunnel, &message, &hash);
    break;
  case GNUNET_MESSENGER_KIND_PEER:
    forward_message = recv_message_peer (tunnel->room, tunnel, &message, &hash);
    break;
  case GNUNET_MESSENGER_KIND_REQUEST:
    forward_message = recv_message_request (tunnel->room, tunnel, &message, &hash);
    break;
  default:
    break;
  }
 
  if (GNUNET_YES == forward_message)
  {
    forward_room_message (tunnel->room, tunnel, &message, &hash);
    callback_room_handle_message (tunnel->room, NULL, &message, &hash);
  }
 
receive_done:
  GNUNET_CADET_receive_done (tunnel->channel);
}

References callback_room_handle_message(), GNUNET_MESSENGER_SrvTunnel::channel, copy_message(), decode_message(), forward_room_message(), GNUNET_CADET_receive_done(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_log, GNUNET_MESSENGER_KIND_INFO, GNUNET_MESSENGER_KIND_PEER, GNUNET_MESSENGER_KIND_REQUEST, GNUNET_MESSENGER_name_of_kind(), GNUNET_YES, hash_message(), GNUNET_MESSENGER_Message::header, GNUNET_MESSENGER_MessageHeader::kind, recv_message_info(), recv_message_peer(), recv_message_request(), GNUNET_MESSENGER_SrvTunnel::room, GNUNET_MessageHeader::size, update_room_message(), and update_tunnel_last_message().

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connect_tunnel()

int connect_tunnel

(

struct GNUNET_MESSENGER_SrvTunnel *

tunnel

)

Tries to connect a tunnel by creating a new CADET channel and binding it.

The function returns GNUNET_YES on success, otherwise GNUNET_NO.

Parameters

[in/out]

tunnel Tunnel

Returns

GNUNET_YES on success, otherwise GNUNET_NO

Definition at line 233 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  if (tunnel->channel)
    return GNUNET_NO;
 
  const struct GNUNET_PeerIdentity *door = GNUNET_PEER_resolve2 (tunnel->peer);
 
  struct GNUNET_CADET_Handle *cadet = get_room_cadet (tunnel->room);
  const struct GNUNET_HashCode *key = get_room_key (tunnel->room);
 
  struct GNUNET_MQ_MessageHandler handlers[] = { GNUNET_MQ_hd_var_size(tunnel_message, GNUNET_MESSAGE_TYPE_CADET_CLI,
                                                                       struct GNUNET_MessageHeader, NULL),
                                                 GNUNET_MQ_handler_end() };
 
  struct GNUNET_HashCode port;
  convert_messenger_key_to_port(key, &port);
  tunnel->channel = GNUNET_CADET_channel_create (cadet, tunnel, door, &port, NULL, callback_tunnel_disconnect, handlers);
 
  return GNUNET_YES;
}

References cadet, callback_tunnel_disconnect(), GNUNET_MESSENGER_SrvTunnel::channel, convert_messenger_key_to_port(), get_room_cadet(), get_room_key(), GNUNET_assert, GNUNET_CADET_channel_create(), GNUNET_MESSAGE_TYPE_CADET_CLI, GNUNET_MQ_handler_end, GNUNET_MQ_hd_var_size, GNUNET_NO, GNUNET_PEER_resolve2(), GNUNET_YES, handlers, key, GNUNET_MESSENGER_SrvTunnel::peer, port, and GNUNET_MESSENGER_SrvTunnel::room.

Referenced by enter_room_at(), and rebuild_room_basement_structure().

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disconnect_tunnel()

void disconnect_tunnel

(

struct GNUNET_MESSENGER_SrvTunnel *

tunnel

)

Disconnects and unbinds a channel from a tunnel.

The actual disconnection will be asynchronous.

Parameters

[in/out]

tunnel Tunnel

Definition at line 257 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  if (tunnel->channel)
  {
    delayed_disconnect_channel (tunnel->channel);
 
    tunnel->channel = NULL;
  }
}

References GNUNET_MESSENGER_SrvTunnel::channel, delayed_disconnect_channel(), and GNUNET_assert.

Referenced by callback_room_connect(), rebuild_room_basement_structure(), and recv_message_info().

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is_tunnel_connected()

int is_tunnel_connected

(

const struct GNUNET_MESSENGER_SrvTunnel *

tunnel

)

Returns the status of a currently bound channel of a tunnel.

Parameters

[in]

tunnel

Tunnel

Returns

GNUNET_YES or GNUNET_NO

Definition at line 270 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  return (tunnel->channel ? GNUNET_YES : GNUNET_NO);
}

References GNUNET_MESSENGER_SrvTunnel::channel, GNUNET_assert, GNUNET_NO, and GNUNET_YES.

Referenced by iterate_send_room_message(), and send_room_info().

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callback_tunnel_sent()

static void callback_tunnel_sent ( void *  cls )

static

Definition at line 284 of file gnunet-service-messenger_tunnel.c.

{
  struct GNUNET_MESSENGER_MessageSent *sent = cls;
 
  if (sent->tunnel)
    update_tunnel_last_message (sent->tunnel, &(sent->hash));
 
  GNUNET_free(sent);
}

References GNUNET_free, GNUNET_MESSENGER_MessageSent::hash, GNUNET_MESSENGER_MessageSent::tunnel, and update_tunnel_last_message().

Referenced by send_tunnel_envelope().

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send_tunnel_envelope()

void send_tunnel_envelope	(	struct GNUNET_MESSENGER_SrvTunnel *	tunnel,
		struct GNUNET_MQ_Envelope *	env,
		const struct GNUNET_HashCode *	hash
	)

Sends an envelope containing a message with a given hash through a tunnel.

Parameters

	[in/out]	tunnel Tunnel
	[in/out]	env Envelope
[in]	hash	Hash of message

Definition at line 295 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert((tunnel) && (env) && (hash));
 
  struct GNUNET_MQ_Handle *mq = GNUNET_CADET_get_mq (tunnel->channel);
 
  struct GNUNET_MESSENGER_MessageSent *sent = GNUNET_new(struct GNUNET_MESSENGER_MessageSent);
 
  GNUNET_memcpy(&(sent->hash), hash, sizeof(struct GNUNET_HashCode));
 
  sent->tunnel = tunnel;
 
  GNUNET_MQ_notify_sent (env, callback_tunnel_sent, sent);
  GNUNET_MQ_send (mq, env);
}

References callback_tunnel_sent(), GNUNET_MESSENGER_SrvTunnel::channel, env, GNUNET_assert, GNUNET_CADET_get_mq(), GNUNET_memcpy, GNUNET_MQ_notify_sent(), GNUNET_MQ_send(), GNUNET_new, GNUNET_MESSENGER_MessageSent::hash, mq, and GNUNET_MESSENGER_MessageSent::tunnel.

Referenced by forward_tunnel_message(), iterate_send_room_message(), and send_tunnel_message().

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send_tunnel_message()

int send_tunnel_message	(	struct GNUNET_MESSENGER_SrvTunnel *	tunnel,
		void *	handle,
		struct GNUNET_MESSENGER_Message *	message
	)

Sends a message by packing it automatically into an envelope and passing it through the tunnel.

The used handle will sign the message and the hash will be calculated and stored.

Parameters

[in/out]	tunnel Tunnel
[in/out]	handle Handle
[in/out]	message Message

Returns

GNUNET_YES on success, GNUNET_NO otherwise

Definition at line 314 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert((tunnel) && (handle));
 
  if (!message)
    return GNUNET_NO;
 
  struct GNUNET_HashCode hash;
  struct GNUNET_MQ_Envelope *env = pack_room_message (
      tunnel->room, (struct GNUNET_MESSENGER_SrvHandle*) handle,
      message, &hash, GNUNET_MESSENGER_PACK_MODE_ENVELOPE
  );
 
  destroy_message(message);
 
  if (!env)
    return GNUNET_NO;
 
  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending tunnel message: %s\n",
             GNUNET_h2s(&hash));
 
  send_tunnel_envelope (tunnel, env, &hash);
  return GNUNET_YES;
}

References destroy_message(), env, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_PACK_MODE_ENVELOPE, GNUNET_NO, GNUNET_YES, handle, pack_room_message(), GNUNET_MESSENGER_SrvTunnel::room, send_tunnel_envelope(), and GNUNET_MESSENGER_MessageSent::tunnel.

Referenced by recv_message_info(), and send_room_info().

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forward_tunnel_message()

void forward_tunnel_message	(	struct GNUNET_MESSENGER_SrvTunnel *	tunnel,
		const struct GNUNET_MESSENGER_Message *	message,
		const struct GNUNET_HashCode *	hash
	)

Forwards a given message with a known hash through a tunnel.

Parameters

	[in/out]	tunnel Tunnel
[in]	message	Message
[in]	hash	Hash of message

Definition at line 342 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert((tunnel) && (message) && (hash));
 
  struct GNUNET_MESSENGER_Message *copy = copy_message(message);
  struct GNUNET_MQ_Envelope *env = pack_message (copy, NULL, NULL, GNUNET_MESSENGER_PACK_MODE_ENVELOPE);
 
  destroy_message(copy);
 
  if (!env)
    return;
 
  GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Forwarding tunnel message: %s\n",
             GNUNET_h2s(hash));
 
  send_tunnel_envelope (tunnel, env, hash);
}

References copy_message(), destroy_message(), env, GNUNET_assert, GNUNET_ERROR_TYPE_DEBUG, GNUNET_h2s(), GNUNET_log, GNUNET_MESSENGER_PACK_MODE_ENVELOPE, pack_message(), and send_tunnel_envelope().

Referenced by callback_found_message(), check_room_peer_status(), and forward_about_members().

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get_tunnel_peer_message()

const struct GNUNET_HashCode* get_tunnel_peer_message

(

const struct GNUNET_MESSENGER_SrvTunnel *

tunnel

)

Returns the hash of the latest peer message published through a given tunnel and matching the tunnels peer identity.

If no peer message has been linked to the tunnel yet, NULL gets returned.

Parameters

[in]

tunnel

Tunnel

Returns

Hash of peer message or NULL

Definition at line 363 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  return tunnel->peer_message;
}

References GNUNET_assert, and GNUNET_MESSENGER_SrvTunnel::peer_message.

get_tunnel_peer_identity()

void get_tunnel_peer_identity	(	const struct GNUNET_MESSENGER_SrvTunnel *	tunnel,
		struct GNUNET_PeerIdentity *	peer
	)

Writes the peer identity of the peer connected via tunnel to this peer into the peer parameter.

Parameters

[in]	tunnel	Tunnel
[out]	peer	Peer identity

Definition at line 371 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  GNUNET_PEER_resolve(tunnel->peer, peer);
}

References GNUNET_assert, GNUNET_PEER_resolve(), GNUNET_MESSENGER_SrvTunnel::peer, and peer.

Referenced by callback_room_disconnect(), and recv_message_info().

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get_tunnel_messenger_version()

uint32_t get_tunnel_messenger_version

(

const struct GNUNET_MESSENGER_SrvTunnel *

tunnel

)

Returns the current messenger version the peer connected via a given tunnel has reported to be using if it was compatible during updating.

See also

update_tunnel_messenger_version

Parameters

[in]

tunnel

Tunnel

Returns

Version of messenger

Definition at line 380 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  return tunnel->messenger_version;
}

References GNUNET_assert, and GNUNET_MESSENGER_SrvTunnel::messenger_version.

Referenced by iterate_send_room_message(), and recv_message_info().

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update_tunnel_messenger_version()

int update_tunnel_messenger_version	(	struct GNUNET_MESSENGER_SrvTunnel *	tunnel,
		uint32_t	version
	)

Updates the messenger version of the tunnel to a given version if it is compatible to the running peer of the service.

Depending on success it returns GNUNET_OK or GNUNET_SYSERR on failure.

Parameters

	[in/out]	tunnel Tunnel
[in]	version	Version of messenger

Definition at line 388 of file gnunet-service-messenger_tunnel.c.

{
  GNUNET_assert(tunnel);
 
  if (version != GNUNET_MESSENGER_VERSION)
    return GNUNET_SYSERR;
 
  if (version > tunnel->messenger_version)
    tunnel->messenger_version = version;
 
  return GNUNET_OK;
}

References GNUNET_assert, GNUNET_MESSENGER_VERSION, GNUNET_OK, GNUNET_SYSERR, and GNUNET_MESSENGER_SrvTunnel::messenger_version.

Referenced by recv_message_info().

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