layer2.h

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/*
 * Layer 2 defines
 *
 * Copyright 2008  by Karsten Keil <[email protected]>
 *
 * 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, int, int);
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     TEIrelease(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