aboutsummaryrefslogtreecommitdiff
path: root/drivers/isdn/mISDN/layer2.h
blob: de2dd02056a36c607f9568e5c7b332038795ee0b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
 * Layer 2 defines
 *
 * Copyright 2008  by Karsten Keil <kkeil@novell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/mISDNif.h>
#include <linux/skbuff.h>
#include "fsm.h"

#define MAX_WINDOW	8

struct manager {
	struct mISDNchannel	ch;
	struct mISDNchannel	bcast;
	u_long			options;
	struct list_head	layer2;
	rwlock_t		lock;
	struct FsmInst		deact;
	struct FsmTimer		datimer;
	struct sk_buff_head	sendq;
	struct mISDNchannel	*up;
	u_int			nextid;
	u_int			lastid;
};

struct teimgr {
	int			ri;
	int			rcnt;
	struct FsmInst		tei_m;
	struct FsmTimer		timer;
	int			tval, nval;
	struct layer2		*l2;
	struct manager		*mgr;
};

struct laddr {
	u_char	A;
	u_char	B;
};

struct layer2 {
	struct list_head	list;
	struct mISDNchannel	ch;
	u_long			flag;
	int			id;
	struct mISDNchannel	*up;
	signed char		sapi;
	signed char		tei;
	struct laddr		addr;
	u_int			maxlen;
	struct teimgr		*tm;
	u_int			vs, va, vr;
	int			rc;
	u_int			window;
	u_int			sow;
	struct FsmInst		l2m;
	struct FsmTimer		t200, t203;
	int			T200, N200, T203;
	u_int			next_id;
	u_int			down_id;
	struct sk_buff		*windowar[MAX_WINDOW];
	struct sk_buff_head	i_queue;
	struct sk_buff_head	ui_queue;
	struct sk_buff_head	down_queue;
	struct sk_buff_head	tmp_queue;
};

enum {
	ST_L2_1,
	ST_L2_2,
	ST_L2_3,
	ST_L2_4,
	ST_L2_5,
	ST_L2_6,
	ST_L2_7,
	ST_L2_8,
};

#define L2_STATE_COUNT (ST_L2_8+1)

extern struct layer2	*create_l2(struct mISDNchannel *, u_int,
				u_long, u_long);
extern int		tei_l2(struct layer2 *, u_int, u_long arg);


/* from tei.c */
extern int 		l2_tei(struct layer2 *, u_int, u_long arg);
extern void 		release_tei(struct layer2 *);
extern int 		TEIInit(u_int *);
extern void 		TEIFree(void);

#define MAX_L2HEADER_LEN 4

#define RR	0x01
#define RNR	0x05
#define REJ	0x09
#define SABME	0x6f
#define SABM	0x2f
#define DM	0x0f
#define UI	0x03
#define DISC	0x43
#define UA	0x63
#define FRMR	0x87
#define XID	0xaf

#define CMD	0
#define RSP	1

#define LC_FLUSH_WAIT 1

#define FLG_LAPB	0
#define FLG_LAPD	1
#define FLG_ORIG	2
#define FLG_MOD128	3
#define FLG_PEND_REL	4
#define FLG_L3_INIT	5
#define FLG_T200_RUN	6
#define FLG_ACK_PEND	7
#define FLG_REJEXC	8
#define FLG_OWN_BUSY	9
#define FLG_PEER_BUSY	10
#define FLG_DCHAN_BUSY	11
#define FLG_L1_ACTIV	12
#define FLG_ESTAB_PEND	13
#define FLG_PTP		14
#define FLG_FIXED_TEI	15
#define FLG_L2BLOCK	16
#define FLG_L1_NOTREADY	17
#define FLG_LAPD_NET	18