connector.h

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/*
 *  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 */