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/*
This file is part of GNUnet.
Copyright (C) 2021 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_operation.c
* @brief GNUnet MESSENGER service
*/
#include "gnunet-service-messenger_operation.h"
#include "gnunet-service-messenger_operation_store.h"
struct GNUNET_MESSENGER_Operation*
create_operation (const struct GNUNET_HashCode *hash)
{
GNUNET_assert(hash);
struct GNUNET_MESSENGER_Operation *op = GNUNET_new(struct GNUNET_MESSENGER_Operation);
op->type = GNUNET_MESSENGER_OP_UNKNOWN;
GNUNET_memcpy(&(op->hash), hash, sizeof(*hash));
op->timestamp = GNUNET_TIME_absolute_get_zero_();
op->store = NULL;
op->task = NULL;
return op;
}
void
destroy_operation (struct GNUNET_MESSENGER_Operation *op)
{
GNUNET_assert(op);
if (op->task)
GNUNET_SCHEDULER_cancel(op->task);
GNUNET_free(op);
}
static void
callback_operation (void *cls);
struct GNUNET_MESSENGER_Operation*
load_operation (struct GNUNET_MESSENGER_OperationStore *store, const char *path)
{
GNUNET_assert((store) && (path));
struct GNUNET_CONFIGURATION_Handle *cfg = GNUNET_CONFIGURATION_create ();
struct GNUNET_MESSENGER_Operation* op = NULL;
if (GNUNET_OK != GNUNET_CONFIGURATION_parse(cfg, path))
goto destroy_config;
struct GNUNET_HashCode hash;
if (GNUNET_OK != GNUNET_CONFIGURATION_get_data (cfg, "operation", "hash", &hash, sizeof(hash)))
goto destroy_config;
op = create_operation(&hash);
unsigned long long type_number;
if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number(cfg, "operation", "type", &type_number))
switch (type_number)
{
case GNUNET_MESSENGER_OP_REQUEST:
op->type = GNUNET_MESSENGER_OP_REQUEST;
break;
case GNUNET_MESSENGER_OP_DELETE:
op->type = GNUNET_MESSENGER_OP_DELETE;
break;
case GNUNET_MESSENGER_OP_MERGE:
op->type = GNUNET_MESSENGER_OP_MERGE;
break;
default:
break;
}
if ((GNUNET_MESSENGER_OP_UNKNOWN == op->type) ||
(GNUNET_OK != GNUNET_CONFIGURATION_get_data (cfg, "operation", "timestamp", &(op->timestamp), sizeof(op->timestamp))))
{
destroy_operation(op);
op = NULL;
goto destroy_config;
}
const struct GNUNET_TIME_Relative delay = GNUNET_TIME_absolute_get_remaining(op->timestamp);
op->task = GNUNET_SCHEDULER_add_delayed_with_priority(
delay,
GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
callback_operation,
op
);
op->store = store;
destroy_config:
GNUNET_CONFIGURATION_destroy (cfg);
return op;
}
void
save_operation (const struct GNUNET_MESSENGER_Operation *op, const char *path)
{
GNUNET_assert((path) && (op));
struct GNUNET_CONFIGURATION_Handle *cfg = GNUNET_CONFIGURATION_create ();
char *hash_data;
hash_data = GNUNET_STRINGS_data_to_string_alloc (&(op->hash), sizeof(op->hash));
if (hash_data)
{
GNUNET_CONFIGURATION_set_value_string (cfg, "operation", "hash", hash_data);
GNUNET_free(hash_data);
}
GNUNET_CONFIGURATION_set_value_number(cfg, "operation", "type", op->type);
char *timestamp_data;
timestamp_data = GNUNET_STRINGS_data_to_string_alloc (&(op->timestamp), sizeof(op->timestamp));
if (timestamp_data)
{
GNUNET_CONFIGURATION_set_value_string (cfg, "operation", "timestamp", timestamp_data);
GNUNET_free(timestamp_data);
}
GNUNET_CONFIGURATION_write (cfg, path);
GNUNET_CONFIGURATION_destroy (cfg);
}
extern void
callback_store_operation (struct GNUNET_MESSENGER_OperationStore *store,
enum GNUNET_MESSENGER_OperationType type,
const struct GNUNET_HashCode *hash);
static void
callback_operation (void *cls)
{
struct GNUNET_MESSENGER_Operation *op = cls;
op->task = NULL;
callback_store_operation (op->store, op->type, &(op->hash));
}
int
start_operation (struct GNUNET_MESSENGER_Operation *op,
enum GNUNET_MESSENGER_OperationType type,
struct GNUNET_MESSENGER_OperationStore *store,
struct GNUNET_TIME_Relative delay)
{
GNUNET_assert((op) && (store));
if (op->task)
return GNUNET_SYSERR;
const struct GNUNET_TIME_Absolute timestamp = GNUNET_TIME_absolute_add(
GNUNET_TIME_absolute_get(),
delay
);
op->task = GNUNET_SCHEDULER_add_delayed_with_priority(
delay,
GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
callback_operation,
op
);
op->type = type;
op->timestamp = timestamp;
op->store = store;
return GNUNET_OK;
}
int
stop_operation (struct GNUNET_MESSENGER_Operation *op)
{
GNUNET_assert(op);
if (!op->task)
return GNUNET_SYSERR;
GNUNET_SCHEDULER_cancel(op->task);
op->task = NULL;
op->type = GNUNET_MESSENGER_OP_UNKNOWN;
op->timestamp = GNUNET_TIME_absolute_get_zero_();
op->store = NULL;
return GNUNET_OK;
}
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