[linux-2.6-block.git] / include / net / llc.h

#ifndef LLC_H
#define LLC_H
/*
 * Copyright (c) 1997 by Procom Technology, Inc.
 * 		 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 * This program can be redistributed or modified under the terms of the
 * GNU General Public License as published by the Free Software Foundation.
 * This program is distributed without any warranty or implied warranty
 * of merchantability or fitness for a particular purpose.
 *
 * See the GNU General Public License for more details.
 */

#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/list.h>
#include <linux/spinlock.h>

#include <asm/atomic.h>

struct net_device;
struct packet_type;
struct sk_buff;

struct llc_addr {
	unsigned char lsap;
	unsigned char mac[IFHWADDRLEN];
};

#define LLC_SAP_STATE_INACTIVE	1
#define LLC_SAP_STATE_ACTIVE	2

/**
 * struct llc_sap - Defines the SAP component
 *
 * @station - station this sap belongs to
 * @state - sap state
 * @p_bit - only lowest-order bit used
 * @f_bit - only lowest-order bit used
 * @laddr - SAP value in this 'lsap'
 * @node - entry in station sap_list
 * @sk_list - LLC sockets this one manages
 */
struct llc_sap {
	unsigned char	 state;
	unsigned char	 p_bit;
	unsigned char	 f_bit;
	atomic_t         refcnt;
	int		 (*rcv_func)(struct sk_buff *skb,
				     struct net_device *dev,
				     struct packet_type *pt,
				     struct net_device *orig_dev);
	struct llc_addr	 laddr;
	struct list_head node;
	struct {
		rwlock_t	  lock;
		struct hlist_head list;
	} sk_list;
};

#define LLC_DEST_INVALID         0      /* Invalid LLC PDU type */
#define LLC_DEST_SAP             1      /* Type 1 goes here */
#define LLC_DEST_CONN            2      /* Type 2 goes here */

extern struct list_head llc_sap_list;
extern rwlock_t llc_sap_list_lock;

extern int llc_rcv(struct sk_buff *skb, struct net_device *dev,
		   struct packet_type *pt, struct net_device *orig_dev);

extern int llc_mac_hdr_init(struct sk_buff *skb,
			    const unsigned char *sa, const unsigned char *da);

extern void llc_add_pack(int type, void (*handler)(struct llc_sap *sap,
						   struct sk_buff *skb));
extern void llc_remove_pack(int type);

extern void llc_set_station_handler(void (*handler)(struct sk_buff *skb));

extern struct llc_sap *llc_sap_open(unsigned char lsap,
				    int (*rcv)(struct sk_buff *skb,
					       struct net_device *dev,
					       struct packet_type *pt,
					       struct net_device *orig_dev));
static inline void llc_sap_hold(struct llc_sap *sap)
{
	atomic_inc(&sap->refcnt);
}

extern void llc_sap_close(struct llc_sap *sap);

static inline void llc_sap_put(struct llc_sap *sap)
{
	if (atomic_dec_and_test(&sap->refcnt))
		llc_sap_close(sap);
}

extern struct llc_sap *llc_sap_find(unsigned char sap_value);

extern int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb,
				     unsigned char *dmac, unsigned char dsap);

extern void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb);
extern void llc_conn_handler(struct llc_sap *sap, struct sk_buff *skb);

extern int llc_station_init(void);
extern void llc_station_exit(void);

#ifdef CONFIG_PROC_FS
extern int llc_proc_init(void);
extern void llc_proc_exit(void);
#else
#define llc_proc_init()	(0)
#define llc_proc_exit()	do { } while(0)
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_SYSCTL
extern int llc_sysctl_init(void);
extern void llc_sysctl_exit(void);

extern int sysctl_llc2_ack_timeout;
extern int sysctl_llc2_busy_timeout;
extern int sysctl_llc2_p_timeout;
extern int sysctl_llc2_rej_timeout;
extern int sysctl_llc_station_ack_timeout;
#else
#define llc_sysctl_init() (0)
#define llc_sysctl_exit() do { } while(0)
#endif /* CONFIG_SYSCTL */
#endif /* LLC_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef LLC_H
	2	#define LLC_H
	3	/*
	4	* Copyright (c) 1997 by Procom Technology, Inc.
	5	* 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
	6	*
	7	* This program can be redistributed or modified under the terms of the
	8	* GNU General Public License as published by the Free Software Foundation.
	9	* This program is distributed without any warranty or implied warranty
	10	* of merchantability or fitness for a particular purpose.
	11	*
	12	* See the GNU General Public License for more details.
	13	*/
	14
	15	#include <linux/if.h>
	16	#include <linux/if_ether.h>
	17	#include <linux/list.h>
	18	#include <linux/spinlock.h>
	19
6e2144b7 ACM	20	#include <asm/atomic.h>
6e2144b7 ACM	21
1da177e4 LT	22	struct net_device;
	23	struct packet_type;
	24	struct sk_buff;
	25
	26	struct llc_addr {
	27	unsigned char lsap;
	28	unsigned char mac[IFHWADDRLEN];
	29	};
	30
	31	#define LLC_SAP_STATE_INACTIVE 1
	32	#define LLC_SAP_STATE_ACTIVE 2
	33
	34	/**
	35	* struct llc_sap - Defines the SAP component
	36	*
	37	* @station - station this sap belongs to
	38	* @state - sap state
	39	* @p_bit - only lowest-order bit used
	40	* @f_bit - only lowest-order bit used
	41	* @laddr - SAP value in this 'lsap'
	42	* @node - entry in station sap_list
	43	* @sk_list - LLC sockets this one manages
	44	*/
	45	struct llc_sap {
	46	unsigned char state;
	47	unsigned char p_bit;
	48	unsigned char f_bit;
6e2144b7	49	atomic_t refcnt;
1da177e4 LT	50	int (rcv_func)(struct sk_buff skb,
1da177e4 LT	51	struct net_device *dev,
f2ccd8fa DM	52	struct packet_type *pt,
f2ccd8fa DM	53	struct net_device *orig_dev);
1da177e4 LT	54	struct llc_addr laddr;
	55	struct list_head node;
	56	struct {
	57	rwlock_t lock;
	58	struct hlist_head list;
	59	} sk_list;
	60	};
	61
	62	#define LLC_DEST_INVALID 0 /* Invalid LLC PDU type */
	63	#define LLC_DEST_SAP 1 /* Type 1 goes here */
	64	#define LLC_DEST_CONN 2 /* Type 2 goes here */
	65
	66	extern struct list_head llc_sap_list;
	67	extern rwlock_t llc_sap_list_lock;
1da177e4 LT	68
1da177e4 LT	69	extern int llc_rcv(struct sk_buff skb, struct net_device dev,
f2ccd8fa	70	struct packet_type pt, struct net_device orig_dev);
1da177e4 LT	71
1da177e4 LT	72	extern int llc_mac_hdr_init(struct sk_buff *skb,
f4ad2b16	73	const unsigned char sa, const unsigned char da);
1da177e4 LT	74
	75	extern void llc_add_pack(int type, void (handler)(struct llc_sap sap,
	76	struct sk_buff *skb));
	77	extern void llc_remove_pack(int type);
	78
	79	extern void llc_set_station_handler(void (handler)(struct sk_buff skb));
	80
	81	extern struct llc_sap *llc_sap_open(unsigned char lsap,
	82	int (rcv)(struct sk_buff skb,
	83	struct net_device *dev,
f2ccd8fa DM	84	struct packet_type *pt,
f2ccd8fa DM	85	struct net_device *orig_dev));
6e2144b7 ACM	86	static inline void llc_sap_hold(struct llc_sap *sap)
	87	{
	88	atomic_inc(&sap->refcnt);
	89	}
	90
2928c19e ACM	91	extern void llc_sap_close(struct llc_sap *sap);
2928c19e ACM	92
6e2144b7 ACM	93	static inline void llc_sap_put(struct llc_sap *sap)
6e2144b7 ACM	94	{
6e2144b7 ACM	95	if (atomic_dec_and_test(&sap->refcnt))
	96	llc_sap_close(sap);
	97	}
1da177e4 LT	98
	99	extern struct llc_sap *llc_sap_find(unsigned char sap_value);
	100
	101	extern int llc_build_and_send_ui_pkt(struct llc_sap sap, struct sk_buff skb,
	102	unsigned char *dmac, unsigned char dsap);
	103
2928c19e ACM	104	extern void llc_sap_handler(struct llc_sap sap, struct sk_buff skb);
	105	extern void llc_conn_handler(struct llc_sap sap, struct sk_buff skb);
	106
1da177e4 LT	107	extern int llc_station_init(void);
	108	extern void llc_station_exit(void);
	109
	110	#ifdef CONFIG_PROC_FS
	111	extern int llc_proc_init(void);
	112	extern void llc_proc_exit(void);
	113	#else
	114	#define llc_proc_init() (0)
	115	#define llc_proc_exit() do { } while(0)
	116	#endif /* CONFIG_PROC_FS */
590232a7 ACM	117	#ifdef CONFIG_SYSCTL
	118	extern int llc_sysctl_init(void);
	119	extern void llc_sysctl_exit(void);
2928c19e ACM	120
	121	extern int sysctl_llc2_ack_timeout;
	122	extern int sysctl_llc2_busy_timeout;
	123	extern int sysctl_llc2_p_timeout;
	124	extern int sysctl_llc2_rej_timeout;
	125	extern int sysctl_llc_station_ack_timeout;
590232a7 ACM	126	#else
	127	#define llc_sysctl_init() (0)
	128	#define llc_sysctl_exit() do { } while(0)
	129	#endif /* CONFIG_SYSCTL */
1da177e4	130	#endif /* LLC_H */