[CONNECTOR]: Update documentation to match reality.
[linux-2.6/verdex.git] / include / net / llc.h
blob1adb2ef3f6f7b975cb1c59de626b70a17fa79f07
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>
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.
12 * See the GNU General Public License for more details.
15 #include <linux/if.h>
16 #include <linux/if_ether.h>
17 #include <linux/list.h>
18 #include <linux/spinlock.h>
20 #include <asm/atomic.h>
22 struct net_device;
23 struct packet_type;
24 struct sk_buff;
26 struct llc_addr {
27 unsigned char lsap;
28 unsigned char mac[IFHWADDRLEN];
31 #define LLC_SAP_STATE_INACTIVE 1
32 #define LLC_SAP_STATE_ACTIVE 2
34 /**
35 * struct llc_sap - Defines the SAP component
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
45 struct llc_sap {
46 unsigned char state;
47 unsigned char p_bit;
48 unsigned char f_bit;
49 atomic_t refcnt;
50 int (*rcv_func)(struct sk_buff *skb,
51 struct net_device *dev,
52 struct packet_type *pt,
53 struct net_device *orig_dev);
54 struct llc_addr laddr;
55 struct list_head node;
56 struct {
57 rwlock_t lock;
58 struct hlist_head list;
59 } sk_list;
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 */
66 extern struct list_head llc_sap_list;
67 extern rwlock_t llc_sap_list_lock;
68 extern unsigned char llc_station_mac_sa[ETH_ALEN];
70 extern int llc_rcv(struct sk_buff *skb, struct net_device *dev,
71 struct packet_type *pt, struct net_device *orig_dev);
73 extern int llc_mac_hdr_init(struct sk_buff *skb,
74 unsigned char *sa, unsigned char *da);
76 extern void llc_add_pack(int type, void (*handler)(struct llc_sap *sap,
77 struct sk_buff *skb));
78 extern void llc_remove_pack(int type);
80 extern void llc_set_station_handler(void (*handler)(struct sk_buff *skb));
82 extern struct llc_sap *llc_sap_open(unsigned char lsap,
83 int (*rcv)(struct sk_buff *skb,
84 struct net_device *dev,
85 struct packet_type *pt,
86 struct net_device *orig_dev));
87 static inline void llc_sap_hold(struct llc_sap *sap)
89 atomic_inc(&sap->refcnt);
92 extern void llc_sap_close(struct llc_sap *sap);
94 static inline void llc_sap_put(struct llc_sap *sap)
96 if (atomic_dec_and_test(&sap->refcnt))
97 llc_sap_close(sap);
100 extern struct llc_sap *llc_sap_find(unsigned char sap_value);
102 extern int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb,
103 unsigned char *dmac, unsigned char dsap);
105 extern void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb);
106 extern void llc_conn_handler(struct llc_sap *sap, struct sk_buff *skb);
108 extern int llc_station_init(void);
109 extern void llc_station_exit(void);
111 #ifdef CONFIG_PROC_FS
112 extern int llc_proc_init(void);
113 extern void llc_proc_exit(void);
114 #else
115 #define llc_proc_init() (0)
116 #define llc_proc_exit() do { } while(0)
117 #endif /* CONFIG_PROC_FS */
118 #ifdef CONFIG_SYSCTL
119 extern int llc_sysctl_init(void);
120 extern void llc_sysctl_exit(void);
122 extern int sysctl_llc2_ack_timeout;
123 extern int sysctl_llc2_busy_timeout;
124 extern int sysctl_llc2_p_timeout;
125 extern int sysctl_llc2_rej_timeout;
126 extern int sysctl_llc_station_ack_timeout;
127 #else
128 #define llc_sysctl_init() (0)
129 #define llc_sysctl_exit() do { } while(0)
130 #endif /* CONFIG_SYSCTL */
131 #endif /* LLC_H */