#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 unsigned char llc_station_mac_sa[ETH_ALEN]; 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_FSextern 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_SYSCTLextern 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 */