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- #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_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 */
-