1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Layer 2 defines
4 *
5 * Copyright 2008  by Karsten Keil <kkeil@novell.com>
6 */
7
8#include <linux/mISDNif.h>
9#include <linux/skbuff.h>
10#include "fsm.h"
11
12#define MAX_WINDOW	8
13
14struct manager {
15	struct mISDNchannel	ch;
16	struct mISDNchannel	bcast;
17	u_long			options;
18	struct list_head	layer2;
19	rwlock_t		lock;
20	struct FsmInst		deact;
21	struct FsmTimer		datimer;
22	struct sk_buff_head	sendq;
23	struct mISDNchannel	*up;
24	u_int			nextid;
25	u_int			lastid;
26};
27
28struct teimgr {
29	int			ri;
30	int			rcnt;
31	struct FsmInst		tei_m;
32	struct FsmTimer		timer;
33	int			tval, nval;
34	struct layer2		*l2;
35	struct manager		*mgr;
36};
37
38struct laddr {
39	u_char	A;
40	u_char	B;
41};
42
43struct layer2 {
44	struct list_head	list;
45	struct mISDNchannel	ch;
46	u_long			flag;
47	int			id;
48	struct mISDNchannel	*up;
49	signed char		sapi;
50	signed char		tei;
51	struct laddr		addr;
52	u_int			maxlen;
53	struct teimgr		*tm;
54	u_int			vs, va, vr;
55	int			rc;
56	u_int			window;
57	u_int			sow;
58	struct FsmInst		l2m;
59	struct FsmTimer		t200, t203;
60	int			T200, N200, T203;
61	u_int			next_id;
62	u_int			down_id;
63	struct sk_buff		*windowar[MAX_WINDOW];
64	struct sk_buff_head	i_queue;
65	struct sk_buff_head	ui_queue;
66	struct sk_buff_head	down_queue;
67	struct sk_buff_head	tmp_queue;
68};
69
70enum {
71	ST_L2_1,
72	ST_L2_2,
73	ST_L2_3,
74	ST_L2_4,
75	ST_L2_5,
76	ST_L2_6,
77	ST_L2_7,
78	ST_L2_8,
79};
80
81#define L2_STATE_COUNT (ST_L2_8 + 1)
82
83extern struct layer2	*create_l2(struct mISDNchannel *, u_int,
84				   u_long, int, int);
85extern int		tei_l2(struct layer2 *, u_int, u_long arg);
86
87
88/* from tei.c */
89extern int		l2_tei(struct layer2 *, u_int, u_long arg);
90extern void		TEIrelease(struct layer2 *);
91extern int		TEIInit(u_int *);
92extern void		TEIFree(void);
93
94#define MAX_L2HEADER_LEN 4
95
96#define RR	0x01
97#define RNR	0x05
98#define REJ	0x09
99#define SABME	0x6f
100#define SABM	0x2f
101#define DM	0x0f
102#define UI	0x03
103#define DISC	0x43
104#define UA	0x63
105#define FRMR	0x87
106#define XID	0xaf
107
108#define CMD	0
109#define RSP	1
110
111#define LC_FLUSH_WAIT 1
112
113#define FLG_LAPB	0
114#define FLG_LAPD	1
115#define FLG_ORIG	2
116#define FLG_MOD128	3
117#define FLG_PEND_REL	4
118#define FLG_L3_INIT	5
119#define FLG_T200_RUN	6
120#define FLG_ACK_PEND	7
121#define FLG_REJEXC	8
122#define FLG_OWN_BUSY	9
123#define FLG_PEER_BUSY	10
124#define FLG_DCHAN_BUSY	11
125#define FLG_L1_ACTIV	12
126#define FLG_ESTAB_PEND	13
127#define FLG_PTP		14
128#define FLG_FIXED_TEI	15
129#define FLG_L2BLOCK	16
130#define FLG_L1_NOTREADY	17
131#define FLG_LAPD_NET	18
132