connector.h
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上传日期:2009-04-28
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- /*
- * connector.h
- *
- * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
- * 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 <asm/types.h>
- #define CN_IDX_CONNECTOR 0xffffffff
- #define CN_VAL_CONNECTOR 0xffffffff
- #define CN_NETLINK_USERS 1
- /*
- * Maximum connector's message size.
- */
- #define CONNECTOR_MAX_MSG_SIZE 1024
- /*
- * idx and val are unique identifiers which
- * are used for message routing and
- * must be registered in connector.h for in-kernel usage.
- */
- struct cb_id {
- __u32 idx;
- __u32 val;
- };
- struct cn_msg {
- struct cb_id id;
- __u32 seq;
- __u32 ack;
- __u16 len; /* Length of the following data */
- __u16 flags;
- __u8 data[0];
- };
- /*
- * Notify structure - requests notification about
- * registering/unregistering idx/val in range [first, first+range].
- */
- struct cn_notify_req {
- __u32 first;
- __u32 range;
- };
- /*
- * Main notification control message
- * *_notify_num - number of appropriate cn_notify_req structures after
- * this struct.
- * group - notification receiver's idx.
- * len - total length of the attached data.
- */
- struct cn_ctl_msg {
- __u32 idx_notify_num;
- __u32 val_notify_num;
- __u32 group;
- __u32 len;
- __u8 data[0];
- };
- #ifdef __KERNEL__
- #include <asm/atomic.h>
- #include <linux/list.h>
- #include <linux/workqueue.h>
- #include <net/sock.h>
- #define CN_CBQ_NAMELEN 32
- struct cn_queue_dev {
- atomic_t refcnt;
- unsigned char name[CN_CBQ_NAMELEN];
- struct workqueue_struct *cn_queue;
- struct list_head queue_list;
- spinlock_t queue_lock;
- int netlink_groups;
- struct sock *nls;
- };
- struct cn_callback_id {
- unsigned char name[CN_CBQ_NAMELEN];
- struct cb_id id;
- };
- struct cn_callback_data {
- void (*destruct_data) (void *);
- void *ddata;
-
- void *callback_priv;
- void (*callback) (void *);
- void *free;
- };
- struct cn_callback_entry {
- struct list_head callback_entry;
- struct cn_callback *cb;
- struct work_struct work;
- struct cn_queue_dev *pdev;
- struct cn_callback_id id;
- struct cn_callback_data data;
- int seq, group;
- struct sock *nls;
- };
- struct cn_ctl_entry {
- struct list_head notify_entry;
- struct cn_ctl_msg *msg;
- };
- struct cn_dev {
- struct cb_id id;
- u32 seq, groups;
- struct sock *nls;
- void (*input) (struct sock * sk, int len);
- struct cn_queue_dev *cbdev;
- };
- int cn_add_callback(struct cb_id *, char *, void (*callback) (void *));
- 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, char *name, struct cb_id *id, void (*callback)(void *));
- void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
- struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *);
- void cn_queue_free_dev(struct cn_queue_dev *dev);
- int cn_cb_equal(struct cb_id *, struct cb_id *);
- void cn_queue_wrapper(void *data);
- extern int cn_already_initialized;
- #endif /* __KERNEL__ */
- #endif /* __CONNECTOR_H */