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16#ifndef __ISDNHDLC_H__
17#define __ISDNHDLC_H__
18
19struct isdnhdlc_vars {
20 int bit_shift;
21 int hdlc_bits1;
22 int data_bits;
23 int ffbit_shift;
24 int state;
25 int dstpos;
26
27 u16 crc;
28
29 u8 cbin;
30 u8 shift_reg;
31 u8 ffvalue;
32
33
34 u32 data_received:1;
35
36 u32 dchannel:1;
37
38 u32 do_adapt56:1;
39
40 u32 do_closing:1;
41
42 u32 do_bitreverse:1;
43};
44
45
46#define HDLC_56KBIT 0x01
47#define HDLC_DCHANNEL 0x02
48#define HDLC_BITREVERSE 0x04
49
50
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52
53
54
55#define HDLC_FRAMING_ERROR 1
56#define HDLC_CRC_ERROR 2
57#define HDLC_LENGTH_ERROR 3
58
59extern void isdnhdlc_rcv_init(struct isdnhdlc_vars *hdlc, u32 features);
60
61extern int isdnhdlc_decode(struct isdnhdlc_vars *hdlc, const u8 *src,
62 int slen, int *count, u8 *dst, int dsize);
63
64extern void isdnhdlc_out_init(struct isdnhdlc_vars *hdlc, u32 features);
65
66extern int isdnhdlc_encode(struct isdnhdlc_vars *hdlc, const u8 *src,
67 u16 slen, int *count, u8 *dst, int dsize);
68
69#endif
70