/*
* connector.h
*
* 2004-2005 Copyright (c) Evgeniy Polyakov <[email protected]>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __CONNECTOR_H
#define __CONNECTOR_H


#include <linux/atomic.h>

#include <linux/list.h>
#include <linux/workqueue.h>

#include <net/sock.h>
#include <uapi/linux/connector.h>

#define CN_CBQ_NAMELEN 32

struct cn_queue_dev {
atomic_t refcnt;
unsigned char name[CN_CBQ_NAMELEN];

struct list_head queue_list;
spinlock_t queue_lock;

struct sock *nls;
};

struct cn_callback_id {
unsigned char name[CN_CBQ_NAMELEN];
struct cb_id id;
};

struct cn_callback_entry {
struct list_head callback_entry;
atomic_t refcnt;
struct cn_queue_dev *pdev;

struct cn_callback_id id;
void (*callback) (struct cn_msg *, struct netlink_skb_parms *);

u32 seq, group;
};

struct cn_dev {
struct cb_id id;

u32 seq, groups;
struct sock *nls;
void (*input) (struct sk_buff *skb);

struct cn_queue_dev *cbdev;
};

int cn_add_callback(struct cb_id *id, const char *name,
void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
void cn_del_callback(struct cb_id *);
int cn_netlink_send(struct cn_msg *, u32, gfp_t);

int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name,
struct cb_id *id,
void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
void cn_queue_release_callback(struct cn_callback_entry *);

struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *);
void cn_queue_free_dev(struct cn_queue_dev *dev);

int cn_cb_equal(struct cb_id *, struct cb_id *);

#endif /* __CONNECTOR_H */