| /* |
| * 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, unsigned int __nocast); |
| |
| 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 */ |