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-rw-r--r--src/messenger/gnunet-service-messenger.c306
1 files changed, 306 insertions, 0 deletions
diff --git a/src/messenger/gnunet-service-messenger.c b/src/messenger/gnunet-service-messenger.c
new file mode 100644
index 000000000..2c92305c4
--- /dev/null
+++ b/src/messenger/gnunet-service-messenger.c
@@ -0,0 +1,306 @@
+/*
+ This file is part of GNUnet.
+ Copyright (C) 2020 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
+ */
+/**
+ * @author Tobias Frisch
+ * @file src/messenger/gnunet-service-messenger.c
+ * @brief GNUnet MESSENGER service
+ */
+
+#include "gnunet-service-messenger.h"
+
+#include "gnunet-service-messenger_service.h"
+#include "messenger_api_message.h"
+
+struct GNUNET_MESSENGER_Client
+{
+ struct GNUNET_SERVICE_Client *client;
+ struct GNUNET_MESSENGER_SrvHandle *handle;
+};
+
+struct GNUNET_MESSENGER_Service *messenger;
+
+static int
+check_create (void *cls, const struct GNUNET_MESSENGER_CreateMessage *msg)
+{
+ GNUNET_MQ_check_zero_termination(msg);
+ return GNUNET_OK;
+}
+
+static void
+handle_create (void *cls, const struct GNUNET_MESSENGER_CreateMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ const char *name = ((const char*) msg) + sizeof(*msg);
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handle created with name: %s\n", name);
+
+ setup_handle_name (msg_client->handle, strlen (name) > 0? name : NULL);
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static void
+handle_update (void *cls, const struct GNUNET_MESSENGER_UpdateMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ if (GNUNET_OK != update_handle (msg_client->handle))
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Name is required to update key!\n");
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static void
+handle_destroy (void *cls, const struct GNUNET_MESSENGER_DestroyMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ GNUNET_SERVICE_client_drop (msg_client->client);
+}
+
+static int
+check_set_name (void *cls, const struct GNUNET_MESSENGER_NameMessage *msg)
+{
+ GNUNET_MQ_check_zero_termination(msg);
+ return GNUNET_OK;
+}
+
+static void
+handle_set_name (void *cls, const struct GNUNET_MESSENGER_NameMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ const char *name = ((const char*) msg) + sizeof(*msg);
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Handles name is now: %s\n", name);
+
+ if (GNUNET_YES != set_handle_name (msg_client->handle, name))
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "No valid name: %s\n", name);
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static void
+handle_room_open (void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Opening room: %s\n",
+ GNUNET_h2s (&(msg->key)));
+
+ if (GNUNET_YES == open_handle_room (msg_client->handle, &(msg->key)))
+ {
+ const struct GNUNET_ShortHashCode* member_id = get_handle_member_id(msg_client->handle, &(msg->key));
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Opening room with member id: %s\n",
+ GNUNET_sh2s (member_id));
+
+ struct GNUNET_MESSENGER_RoomMessage *response;
+ struct GNUNET_MQ_Envelope *env;
+
+ env = GNUNET_MQ_msg(response, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN);
+ GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
+ GNUNET_MQ_send (msg_client->handle->mq, env);
+ }
+ else
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Opening room failed: %s\n",
+ GNUNET_h2s (&(msg->key)));
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static void
+handle_room_entry (void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Entering room: %s, %s\n",
+ GNUNET_h2s (&(msg->key)), GNUNET_i2s (&(msg->door)));
+
+ if (GNUNET_YES == entry_handle_room (msg_client->handle, &(msg->door), &(msg->key)))
+ {
+ const struct GNUNET_ShortHashCode* member_id = get_handle_member_id(msg_client->handle, &(msg->key));
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Entering room with member id: %s\n",
+ GNUNET_sh2s (member_id));
+
+ struct GNUNET_MESSENGER_RoomMessage *response;
+ struct GNUNET_MQ_Envelope *env;
+
+ env = GNUNET_MQ_msg(response, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY);
+ GNUNET_memcpy(&(response->door), &(msg->door), sizeof(msg->door));
+ GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
+ GNUNET_MQ_send (msg_client->handle->mq, env);
+ }
+ else
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Entrance into room failed: %s, %s\n",
+ GNUNET_h2s (&(msg->key)), GNUNET_i2s (&(msg->door)));
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static void
+handle_room_close (void *cls, const struct GNUNET_MESSENGER_RoomMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Closing room: %s\n", GNUNET_h2s (&(msg->key)));
+
+ if (GNUNET_YES == close_handle_room (msg_client->handle, &(msg->key)))
+ {
+ const struct GNUNET_ShortHashCode* member_id = get_handle_member_id(msg_client->handle, &(msg->key));
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Closing room with member id: %s\n",
+ GNUNET_sh2s (member_id));
+
+ struct GNUNET_MESSENGER_RoomMessage *response;
+ struct GNUNET_MQ_Envelope *env;
+
+ env = GNUNET_MQ_msg(response, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE);
+ GNUNET_memcpy(&(response->key), &(msg->key), sizeof(msg->key));
+ GNUNET_MQ_send (msg_client->handle->mq, env);
+ }
+ else
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Closing room failed: %s\n", GNUNET_h2s (&(msg->key)));
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static int
+check_send_message (void *cls, const struct GNUNET_MESSENGER_SendMessage *msg)
+{
+ const uint16_t full_length = ntohs (msg->header.size) - sizeof(msg->header);
+
+ if (full_length < sizeof(msg->key))
+ return GNUNET_NO;
+
+ const uint16_t length = full_length - sizeof(msg->key);
+ const char *buffer = ((const char*) msg) + sizeof(*msg);
+
+ struct GNUNET_MESSENGER_Message message;
+
+ if (GNUNET_YES != decode_message (&message, length, buffer))
+ return GNUNET_NO;
+
+ return GNUNET_OK;
+}
+
+static void
+handle_send_message (void *cls, const struct GNUNET_MESSENGER_SendMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ const struct GNUNET_HashCode *key = &(msg->key);
+ const char *buffer = ((const char*) msg) + sizeof(*msg);
+
+ const uint16_t length = ntohs (msg->header.size) - sizeof(*msg);
+
+ struct GNUNET_MESSENGER_Message message;
+ decode_message (&message, length, buffer);
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending message: %s to %s\n",
+ GNUNET_MESSENGER_name_of_kind (message.header.kind),
+ GNUNET_h2s (key));
+
+ if (GNUNET_YES != send_handle_message (msg_client->handle, key, &message))
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Sending message failed: %s to %s\n",
+ GNUNET_MESSENGER_name_of_kind (message.header.kind),
+ GNUNET_h2s (key));
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static void
+handle_get_message (void *cls, const struct GNUNET_MESSENGER_RecvMessage *msg)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = cls;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Requesting message from room: %s\n",
+ GNUNET_h2s (&(msg->key)));
+
+ struct GNUNET_MESSENGER_SrvRoom *room = get_service_room (messenger, &(msg->key));
+
+ if (room)
+ get_room_message (room, msg_client->handle, &(msg->hash), GNUNET_YES);
+ else
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Room not found: %s\n",
+ GNUNET_h2s (&(msg->key)));
+
+ GNUNET_SERVICE_client_continue (msg_client->client);
+}
+
+static void*
+callback_client_connect (void *cls, struct GNUNET_SERVICE_Client *client, struct GNUNET_MQ_Handle *mq)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = GNUNET_new(struct GNUNET_MESSENGER_Client);
+
+ msg_client->client = client;
+ msg_client->handle = add_service_handle (messenger, mq);
+
+ return msg_client;
+}
+
+static void
+callback_client_disconnect (void *cls, struct GNUNET_SERVICE_Client *client, void *internal_cls)
+{
+ struct GNUNET_MESSENGER_Client *msg_client = internal_cls;
+
+ remove_service_handle (messenger, msg_client->handle);
+
+ GNUNET_free(msg_client);
+}
+
+/**
+ * Setup MESSENGER internals.
+ *
+ * @param cls closure
+ * @param config configuration to use
+ * @param service the initialized service
+ */
+static void
+run (void *cls, const struct GNUNET_CONFIGURATION_Handle *config, struct GNUNET_SERVICE_Handle *service)
+{
+ messenger = create_service (config, service);
+
+ if ((!messenger) || (!messenger->cadet) || (!messenger->identity))
+ GNUNET_SCHEDULER_shutdown ();
+}
+
+/**
+ * Define "main" method using service macro.
+ */
+GNUNET_SERVICE_MAIN(
+ GNUNET_MESSENGER_SERVICE_NAME,
+ GNUNET_SERVICE_OPTION_NONE,
+ &run,
+ &callback_client_connect,
+ &callback_client_disconnect,
+ NULL,
+ GNUNET_MQ_hd_var_size( create, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_CREATE, struct GNUNET_MESSENGER_CreateMessage, NULL ),
+ GNUNET_MQ_hd_fixed_size( update, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_UPDATE, struct GNUNET_MESSENGER_UpdateMessage, NULL ),
+ GNUNET_MQ_hd_fixed_size( destroy, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_DESTROY, struct GNUNET_MESSENGER_DestroyMessage, NULL ),
+ GNUNET_MQ_hd_var_size( set_name, GNUNET_MESSAGE_TYPE_MESSENGER_CONNECTION_SET_NAME, struct GNUNET_MESSENGER_NameMessage, NULL ),
+ GNUNET_MQ_hd_fixed_size( room_open, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_OPEN, struct GNUNET_MESSENGER_RoomMessage, NULL ),
+ GNUNET_MQ_hd_fixed_size( room_entry, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_ENTRY, struct GNUNET_MESSENGER_RoomMessage, NULL ),
+ GNUNET_MQ_hd_fixed_size( room_close, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_CLOSE, struct GNUNET_MESSENGER_RoomMessage, NULL ),
+ GNUNET_MQ_hd_var_size( send_message, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_SEND_MESSAGE, struct GNUNET_MESSENGER_SendMessage, NULL ),
+ GNUNET_MQ_hd_fixed_size( get_message, GNUNET_MESSAGE_TYPE_MESSENGER_ROOM_GET_MESSAGE, struct GNUNET_MESSENGER_RecvMessage, NULL ),
+ GNUNET_MQ_handler_end());