isdn/mISDN/layer2.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * Layer 2 defines
0004  *
0005  * Copyright 2008  by Karsten Keil <kkeil@novell.com>
0006  */
0007
0008 #include <linux/mISDNif.h>
0009 #include <linux/skbuff.h>
0010 #include "fsm.h"
0011
0012 #define MAX_WINDOW  8
0013
0014 struct manager {
0015     struct mISDNchannel ch;
0016     struct mISDNchannel bcast;
0017     u_long          options;
0018     struct list_head    layer2;
0019     rwlock_t        lock;
0020     struct FsmInst      deact;
0021     struct FsmTimer     datimer;
0022     struct sk_buff_head sendq;
0023     struct mISDNchannel *up;
0024     u_int           nextid;
0025     u_int           lastid;
0026 };
0027
0028 struct teimgr {
0029     int         ri;
0030     int         rcnt;
0031     struct FsmInst      tei_m;
0032     struct FsmTimer     timer;
0033     int         tval, nval;
0034     struct layer2       *l2;
0035     struct manager      *mgr;
0036 };
0037
0038 struct laddr {
0039     u_char  A;
0040     u_char  B;
0041 };
0042
0043 struct layer2 {
0044     struct list_head    list;
0045     struct mISDNchannel ch;
0046     u_long          flag;
0047     int         id;
0048     struct mISDNchannel *up;
0049     signed char     sapi;
0050     signed char     tei;
0051     struct laddr        addr;
0052     u_int           maxlen;
0053     struct teimgr       *tm;
0054     u_int           vs, va, vr;
0055     int         rc;
0056     u_int           window;
0057     u_int           sow;
0058     struct FsmInst      l2m;
0059     struct FsmTimer     t200, t203;
0060     int         T200, N200, T203;
0061     u_int           next_id;
0062     u_int           down_id;
0063     struct sk_buff      *windowar[MAX_WINDOW];
0064     struct sk_buff_head i_queue;
0065     struct sk_buff_head ui_queue;
0066     struct sk_buff_head down_queue;
0067     struct sk_buff_head tmp_queue;
0068 };
0069
0070 enum {
0071     ST_L2_1,
0072     ST_L2_2,
0073     ST_L2_3,
0074     ST_L2_4,
0075     ST_L2_5,
0076     ST_L2_6,
0077     ST_L2_7,
0078     ST_L2_8,
0079 };
0080
0081 #define L2_STATE_COUNT (ST_L2_8 + 1)
0082
0083 extern struct layer2    *create_l2(struct mISDNchannel *, u_int,
0084                    u_long, int, int);
0085 extern int      tei_l2(struct layer2 *, u_int, u_long arg);
0086
0087
0088 /* from tei.c */
0089 extern int      l2_tei(struct layer2 *, u_int, u_long arg);
0090 extern void     TEIrelease(struct layer2 *);
0091 extern int      TEIInit(u_int *);
0092 extern void     TEIFree(void);
0093
0094 #define MAX_L2HEADER_LEN 4
0095
0096 #define RR  0x01
0097 #define RNR 0x05
0098 #define REJ 0x09
0099 #define SABME   0x6f
0100 #define SABM    0x2f
0101 #define DM  0x0f
0102 #define UI  0x03
0103 #define DISC    0x43
0104 #define UA  0x63
0105 #define FRMR    0x87
0106 #define XID 0xaf
0107
0108 #define CMD 0
0109 #define RSP 1
0110
0111 #define LC_FLUSH_WAIT 1
0112
0113 #define FLG_LAPB    0
0114 #define FLG_LAPD    1
0115 #define FLG_ORIG    2
0116 #define FLG_MOD128  3
0117 #define FLG_PEND_REL    4
0118 #define FLG_L3_INIT 5
0119 #define FLG_T200_RUN    6
0120 #define FLG_ACK_PEND    7
0121 #define FLG_REJEXC  8
0122 #define FLG_OWN_BUSY    9
0123 #define FLG_PEER_BUSY   10
0124 #define FLG_DCHAN_BUSY  11
0125 #define FLG_L1_ACTIV    12
0126 #define FLG_ESTAB_PEND  13
0127 #define FLG_PTP     14
0128 #define FLG_FIXED_TEI   15
0129 #define FLG_L2BLOCK 16
0130 #define FLG_L1_NOTREADY 17
0131 #define FLG_LAPD_NET    18