messenger_api_handle.c

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/*
   This file is part of GNUnet.
   Copyright (C) 2020--2023 GNUnet e.V.
 
   GNUnet is free software: you can redistribute it and/or modify it
   under the terms of the GNU Affero General Public License as published
   by the Free Software Foundation, either version 3 of the License,
   or (at your option) any later version.
 
   GNUnet is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Affero General Public License for more details.
 
   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
   SPDX-License-Identifier: AGPL3.0-or-later
 */
#include "messenger_api_handle.h"
 
#include "messenger_api_room.h"
#include "messenger_api_util.h"
 
struct GNUNET_MESSENGER_Handle*
create_handle (const struct GNUNET_CONFIGURATION_Handle *cfg,
               GNUNET_MESSENGER_MessageCallback msg_callback,
               void *msg_cls)
{
  GNUNET_assert (cfg);
 
  struct GNUNET_MESSENGER_Handle *handle = GNUNET_new (struct
                                                       GNUNET_MESSENGER_Handle);
 
  handle->cfg = cfg;
  handle->mq = NULL;
 
  handle->msg_callback = msg_callback;
  handle->msg_cls = msg_cls;
 
  handle->name = NULL;
  handle->key = NULL;
  handle->pubkey = NULL;
 
  handle->reconnect_time = GNUNET_TIME_relative_get_zero_ ();
  handle->reconnect_task = NULL;
 
  handle->rooms = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
 
  init_contact_store (get_handle_contact_store (handle));
 
  return handle;
}
 
 
static enum GNUNET_GenericReturnValue
iterate_destroy_room (void *cls,
                      const struct GNUNET_HashCode *key,
                      void *value)
{
  struct GNUNET_MESSENGER_Room *room = value;
 
  destroy_room (room);
 
  return GNUNET_YES;
}
 
 
void
destroy_handle (struct GNUNET_MESSENGER_Handle *handle)
{
  GNUNET_assert (handle);
 
  clear_contact_store (get_handle_contact_store (handle));
 
  if (handle->rooms)
  {
    GNUNET_CONTAINER_multihashmap_iterate (handle->rooms, iterate_destroy_room,
                                           NULL);
 
    GNUNET_CONTAINER_multihashmap_destroy (handle->rooms);
  }
 
  if (handle->reconnect_task)
    GNUNET_SCHEDULER_cancel (handle->reconnect_task);
 
  if (handle->mq)
    GNUNET_MQ_destroy (handle->mq);
 
  if (handle->name)
    GNUNET_free (handle->name);
 
  if (handle->key)
    GNUNET_free (handle->key);
 
  if (handle->pubkey)
    GNUNET_free (handle->pubkey);
 
  GNUNET_free (handle);
}
 
 
void
set_handle_name (struct GNUNET_MESSENGER_Handle *handle,
                 const char *name)
{
  GNUNET_assert (handle);
 
  if (handle->name)
    GNUNET_free (handle->name);
 
  handle->name = name ? GNUNET_strdup (name) : NULL;
}
 
 
const char*
get_handle_name (const struct GNUNET_MESSENGER_Handle *handle)
{
  GNUNET_assert (handle);
 
  return handle->name;
}
 
 
void
set_handle_key (struct GNUNET_MESSENGER_Handle *handle,
                const struct GNUNET_CRYPTO_PrivateKey *key)
{
  GNUNET_assert (handle);
 
  if (! key)
  {
    if (handle->key)
      GNUNET_free (handle->key);
 
    if (handle->pubkey)
      GNUNET_free (handle->pubkey);
 
    handle->key = NULL;
    handle->pubkey = NULL;
    return;
  }
 
  if (! handle->key)
    handle->key = GNUNET_new (struct GNUNET_CRYPTO_PrivateKey);
 
  if (! handle->pubkey)
    handle->pubkey = GNUNET_new (struct GNUNET_CRYPTO_PublicKey);
 
  GNUNET_memcpy (handle->key, key, sizeof(*key));
  GNUNET_CRYPTO_key_get_public (key, handle->pubkey);
}
 
 
const struct GNUNET_CRYPTO_PrivateKey*
get_handle_key (const struct GNUNET_MESSENGER_Handle *handle)
{
  GNUNET_assert (handle);
 
  if (handle->key)
    return handle->key;
 
  return get_anonymous_private_key ();
}
 
 
const struct GNUNET_CRYPTO_PublicKey*
get_handle_pubkey (const struct GNUNET_MESSENGER_Handle *handle)
{
  GNUNET_assert (handle);
 
  if (handle->pubkey)
    return handle->pubkey;
 
  return get_anonymous_public_key ();
}
 
 
struct GNUNET_MESSENGER_ContactStore*
get_handle_contact_store (struct GNUNET_MESSENGER_Handle *handle)
{
  GNUNET_assert (handle);
 
  return &(handle->contact_store);
}
 
 
struct GNUNET_MESSENGER_Contact*
get_handle_contact (struct GNUNET_MESSENGER_Handle *handle,
                    const struct GNUNET_HashCode *key)
{
  GNUNET_assert ((handle) && (key));
 
  struct GNUNET_MESSENGER_Room *room = GNUNET_CONTAINER_multihashmap_get (
    handle->rooms, key);
 
  if (! room)
    return NULL;
 
  const struct GNUNET_ShortHashCode *contact_id = get_room_sender_id (room);
 
  if (! contact_id)
    return NULL;
 
  struct GNUNET_HashCode context;
  get_context_from_member (key, contact_id, &context);
 
  return get_store_contact (get_handle_contact_store (handle), &context,
                            get_handle_pubkey (handle));
}
 
 
void
open_handle_room (struct GNUNET_MESSENGER_Handle *handle,
                  const struct GNUNET_HashCode *key)
{
  GNUNET_assert ((handle) && (key));
 
  struct GNUNET_MESSENGER_Room *room = GNUNET_CONTAINER_multihashmap_get (
    handle->rooms, key);
 
  if (room)
    room->opened = GNUNET_YES;
}
 
 
void
entry_handle_room_at (struct GNUNET_MESSENGER_Handle *handle,
                      const struct GNUNET_PeerIdentity *door,
                      const struct GNUNET_HashCode *key)
{
  GNUNET_assert ((handle) && (door) && (key));
 
  struct GNUNET_MESSENGER_Room *room = GNUNET_CONTAINER_multihashmap_get (
    handle->rooms, key);
 
  if (room)
    add_to_list_tunnels (&(room->entries), door, NULL);
}
 
 
void
close_handle_room (struct GNUNET_MESSENGER_Handle *handle,
                   const struct GNUNET_HashCode *key)
{
  GNUNET_assert ((handle) && (key));
 
  struct GNUNET_MESSENGER_Room *room = GNUNET_CONTAINER_multihashmap_get (
    handle->rooms, key);
 
  if ((room) && (GNUNET_YES == GNUNET_CONTAINER_multihashmap_remove (
                   handle->rooms, key, room)))
    destroy_room (room);
}
 
 
struct GNUNET_MESSENGER_Room*
get_handle_room (struct GNUNET_MESSENGER_Handle *handle,
                 const struct GNUNET_HashCode *key)
{
  GNUNET_assert ((handle) && (key));
 
  return GNUNET_CONTAINER_multihashmap_get (handle->rooms, key);
}