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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> |
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, |
51 | struct net_device *dev, | |
f2ccd8fa DM |
52 | struct packet_type *pt, |
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 | |
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 | |
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, |
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); |
92 | ||
6e2144b7 ACM |
93 | static inline void llc_sap_put(struct llc_sap *sap) |
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 */ |