1 /*
2 * Layer 2 defines
3 *
4 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 */
16
17 #include <linux/mISDNif.h>
18 #include <linux/skbuff.h>
19 #include "fsm.h"
20
21 #define MAX_WINDOW 8
22
23 struct manager {
24 struct mISDNchannel ch;
25 struct mISDNchannel bcast;
26 u_long options;
27 struct list_head layer2;
28 rwlock_t lock;
29 struct FsmInst deact;
30 struct FsmTimer datimer;
31 struct sk_buff_head sendq;
32 struct mISDNchannel *up;
33 u_int nextid;
34 u_int lastid;
35 };
36
37 struct teimgr {
38 int ri;
39 int rcnt;
40 struct FsmInst tei_m;
41 struct FsmTimer timer;
42 int tval, nval;
43 struct layer2 *l2;
44 struct manager *mgr;
45 };
46
47 struct laddr {
48 u_char A;
49 u_char B;
50 };
51
52 struct layer2 {
53 struct list_head list;
54 struct mISDNchannel ch;
55 u_long flag;
56 int id;
57 struct mISDNchannel *up;
58 signed char sapi;
59 signed char tei;
60 struct laddr addr;
61 u_int maxlen;
62 struct teimgr *tm;
63 u_int vs, va, vr;
64 int rc;
65 u_int window;
66 u_int sow;
67 struct FsmInst l2m;
68 struct FsmTimer t200, t203;
69 int T200, N200, T203;
70 u_int next_id;
71 u_int down_id;
72 struct sk_buff *windowar[MAX_WINDOW];
73 struct sk_buff_head i_queue;
74 struct sk_buff_head ui_queue;
75 struct sk_buff_head down_queue;
76 struct sk_buff_head tmp_queue;
77 };
78
79 enum {
80 ST_L2_1,
81 ST_L2_2,
82 ST_L2_3,
83 ST_L2_4,
84 ST_L2_5,
85 ST_L2_6,
86 ST_L2_7,
87 ST_L2_8,
88 };
89
90 #define L2_STATE_COUNT (ST_L2_8+1)
91
92 extern struct layer2 *create_l2(struct mISDNchannel *, u_int,
93 u_long, int, int);
94 extern int tei_l2(struct layer2 *, u_int, u_long arg);
95
96
97 /* from tei.c */
98 extern int l2_tei(struct layer2 *, u_int, u_long arg);
99 extern void TEIrelease(struct layer2 *);
100 extern int TEIInit(u_int *);
101 extern void TEIFree(void);
102
103 #define MAX_L2HEADER_LEN 4
104
105 #define RR 0x01
106 #define RNR 0x05
107 #define REJ 0x09
108 #define SABME 0x6f
109 #define SABM 0x2f
110 #define DM 0x0f
111 #define UI 0x03
112 #define DISC 0x43
113 #define UA 0x63
114 #define FRMR 0x87
115 #define XID 0xaf
116
117 #define CMD 0
118 #define RSP 1
119
120 #define LC_FLUSH_WAIT 1
121
122 #define FLG_LAPB 0
123 #define FLG_LAPD 1
124 #define FLG_ORIG 2
125 #define FLG_MOD128 3
126 #define FLG_PEND_REL 4
127 #define FLG_L3_INIT 5
128 #define FLG_T200_RUN 6
129 #define FLG_ACK_PEND 7
130 #define FLG_REJEXC 8
131 #define FLG_OWN_BUSY 9
132 #define FLG_PEER_BUSY 10
133 #define FLG_DCHAN_BUSY 11
134 #define FLG_L1_ACTIV 12
135 #define FLG_ESTAB_PEND 13
136 #define FLG_PTP 14
137 #define FLG_FIXED_TEI 15
138 #define FLG_L2BLOCK 16
139 #define FLG_L1_NOTREADY 17
140 #define FLG_LAPD_NET 18
141
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