1
2 #ifndef _LAPB_H
3 #define _LAPB_H
4 #include <linux/lapb.h>
5 #include <linux/refcount.h>
6
7 #define LAPB_HEADER_LEN 20
8
9 #define LAPB_ACK_PENDING_CONDITION 0x01
10 #define LAPB_REJECT_CONDITION 0x02
11 #define LAPB_PEER_RX_BUSY_CONDITION 0x04
12
13
14 #define LAPB_I 0x00
15 #define LAPB_S 0x01
16 #define LAPB_U 0x03
17
18 #define LAPB_RR 0x01
19 #define LAPB_RNR 0x05
20 #define LAPB_REJ 0x09
21
22 #define LAPB_SABM 0x2F
23 #define LAPB_SABME 0x6F
24 #define LAPB_DISC 0x43
25 #define LAPB_DM 0x0F
26 #define LAPB_UA 0x63
27 #define LAPB_FRMR 0x87
28
29 #define LAPB_ILLEGAL 0x100
30
31 #define LAPB_SPF 0x10
32 #define LAPB_EPF 0x01
33
34 #define LAPB_FRMR_W 0x01
35 #define LAPB_FRMR_X 0x02
36 #define LAPB_FRMR_Y 0x04
37 #define LAPB_FRMR_Z 0x08
38
39 #define LAPB_POLLOFF 0
40 #define LAPB_POLLON 1
41
42
43 #define LAPB_COMMAND 1
44 #define LAPB_RESPONSE 2
45
46 #define LAPB_ADDR_A 0x03
47 #define LAPB_ADDR_B 0x01
48 #define LAPB_ADDR_C 0x0F
49 #define LAPB_ADDR_D 0x07
50
51
52 enum {
53 LAPB_STATE_0,
54 LAPB_STATE_1,
55 LAPB_STATE_2,
56 LAPB_STATE_3,
57 LAPB_STATE_4
58 };
59
60 #define LAPB_DEFAULT_MODE (LAPB_STANDARD | LAPB_SLP | LAPB_DTE)
61 #define LAPB_DEFAULT_WINDOW 7
62 #define LAPB_DEFAULT_T1 (5 * HZ)
63 #define LAPB_DEFAULT_T2 (1 * HZ)
64 #define LAPB_DEFAULT_N2 20
65
66 #define LAPB_SMODULUS 8
67 #define LAPB_EMODULUS 128
68
69
70
71
72 struct lapb_frame {
73 unsigned short type;
74 unsigned short nr, ns;
75 unsigned char cr;
76 unsigned char pf;
77 unsigned char control[2];
78 };
79
80
81
82
83 struct lapb_cb {
84 struct list_head node;
85 struct net_device *dev;
86
87
88 unsigned int mode;
89 unsigned char state;
90 unsigned short vs, vr, va;
91 unsigned char condition;
92 unsigned short n2, n2count;
93 unsigned short t1, t2;
94 struct timer_list t1timer, t2timer;
95
96
97 struct sk_buff_head write_queue;
98 struct sk_buff_head ack_queue;
99 unsigned char window;
100 const struct lapb_register_struct *callbacks;
101
102
103 struct lapb_frame frmr_data;
104 unsigned char frmr_type;
105
106 refcount_t refcnt;
107 };
108
109
110 void lapb_connect_confirmation(struct lapb_cb *lapb, int);
111 void lapb_connect_indication(struct lapb_cb *lapb, int);
112 void lapb_disconnect_confirmation(struct lapb_cb *lapb, int);
113 void lapb_disconnect_indication(struct lapb_cb *lapb, int);
114 int lapb_data_indication(struct lapb_cb *lapb, struct sk_buff *);
115 int lapb_data_transmit(struct lapb_cb *lapb, struct sk_buff *);
116
117
118 void lapb_data_input(struct lapb_cb *lapb, struct sk_buff *);
119
120
121 void lapb_kick(struct lapb_cb *lapb);
122 void lapb_transmit_buffer(struct lapb_cb *lapb, struct sk_buff *, int);
123 void lapb_establish_data_link(struct lapb_cb *lapb);
124 void lapb_enquiry_response(struct lapb_cb *lapb);
125 void lapb_timeout_response(struct lapb_cb *lapb);
126 void lapb_check_iframes_acked(struct lapb_cb *lapb, unsigned short);
127 void lapb_check_need_response(struct lapb_cb *lapb, int, int);
128
129
130 void lapb_clear_queues(struct lapb_cb *lapb);
131 void lapb_frames_acked(struct lapb_cb *lapb, unsigned short);
132 void lapb_requeue_frames(struct lapb_cb *lapb);
133 int lapb_validate_nr(struct lapb_cb *lapb, unsigned short);
134 int lapb_decode(struct lapb_cb *lapb, struct sk_buff *, struct lapb_frame *);
135 void lapb_send_control(struct lapb_cb *lapb, int, int, int);
136 void lapb_transmit_frmr(struct lapb_cb *lapb);
137
138
139 void lapb_start_t1timer(struct lapb_cb *lapb);
140 void lapb_start_t2timer(struct lapb_cb *lapb);
141 void lapb_stop_t1timer(struct lapb_cb *lapb);
142 void lapb_stop_t2timer(struct lapb_cb *lapb);
143 int lapb_t1timer_running(struct lapb_cb *lapb);
144
145
146
147
148
149
150
151
152 #define LAPB_DEBUG 0
153
154 #define lapb_dbg(level, fmt, ...) \
155 do { \
156 if (level < LAPB_DEBUG) \
157 pr_debug(fmt, ##__VA_ARGS__); \
158 } while (0)
159
160 #endif