path: root/src/server/server.h

/*
 * This file is part of the Distributed Network Block Device 3
 *
 * Copyright(c) 2011-2012 Johann Latocha <johann@latocha.de>
 *
 * This file may be licensed under the terms of of the
 * GNU General Public License Version 2 (the ``GPL'').
 *
 * Software distributed under the License is distributed
 * on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either
 * express or implied. See the GPL for the specific language
 * governing rights and limitations.
 *
 * You should have received a copy of the GPL along with this
 * program. If not, go to http://www.gnu.org/licenses/gpl.html
 * or write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#ifndef SERVER_H_
#define SERVER_H_

#include <stdint.h>
#include <stdio.h>
#include <glib.h>

#include "../config.h"
#include "../types.h"

struct dnbd3_image_t;

typedef struct
{
	uint16_t len;
	uint8_t data[65535];
} dnbd3_binstring_t;
// Do not always allocate as much memory as required to hold the entire binstring struct,
// but only as much as is required to hold the actual data
#define NEW_BINSTRING(_name, _len) \
	dnbd3_binstring_t *_name = malloc(sizeof(uint16_t) + _len); \
	_name->len = _len

typedef struct
{
	int sock;
	dnbd3_host_t host;
	uint8_t is_server;         // TRUE if a server in proxy mode, FALSE if real client
	pthread_t thread;
	dnbd3_image_t *image;
	pthread_spinlock_t lock;
	GSList *sendqueue;         // list of dnbd3_binstring_t*
} dnbd3_client_t;

typedef struct
{
	time_t last_told;
	dnbd3_host_t host;
	char comment[COMMENT_LENGTH];
} dnbd3_alt_server_t;

typedef struct
{
	char comment[COMMENT_LENGTH];
	dnbd3_host_t host;
	dnbd3_host_t mask;
} dnbd3_acess_rules_t;

extern dnbd3_client_t *_clients[SERVER_MAX_CLIENTS];
extern int _num_clients;
extern pthread_spinlock_t _clients_lock;

extern char *_config_file_name, *_rpc_password, *_cache_dir;

#ifdef _DEBUG
extern int _fake_delay;
#endif

void dnbd3_cleanup();
void dnbd3_add_client(dnbd3_client_t *client);
void dnbd3_remove_client(dnbd3_client_t *client);
dnbd3_client_t* dnbd3_init_client(struct sockaddr_storage *client, int fd);
void dnbd3_free_client(dnbd3_client_t *client);

#if !defined(_FILE_OFFSET_BITS) || _FILE_OFFSET_BITS != 64
#error Please set _FILE_OFFSET_BITS to 64 in your makefile/configuration
#endif

#endif /* SERVER_H_ */