drivers/isdn/mISDN/layer2.h

   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