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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/isdn/mISDN/layer2.h
15111 views
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/*

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 * Layer 2 defines

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 *

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 * Copyright 2008  by Karsten Keil <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 * GNU General Public License for more details.

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 *

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 */

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#include <linux/mISDNif.h>

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#include <linux/skbuff.h>

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#include "fsm.h"

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#define MAX_WINDOW	8

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struct manager {

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	struct mISDNchannel	ch;

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	struct mISDNchannel	bcast;

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	u_long			options;

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	struct list_head	layer2;

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	rwlock_t		lock;

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	struct FsmInst		deact;

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	struct FsmTimer		datimer;

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	struct sk_buff_head	sendq;

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	struct mISDNchannel	*up;

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	u_int			nextid;

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	u_int			lastid;

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};

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struct teimgr {

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	int			ri;

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	int			rcnt;

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	struct FsmInst		tei_m;

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	struct FsmTimer		timer;

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	int			tval, nval;

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	struct layer2		*l2;

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	struct manager		*mgr;

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};

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struct laddr {

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	u_char	A;

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	u_char	B;

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};

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struct layer2 {

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	struct list_head	list;

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	struct mISDNchannel	ch;

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	u_long			flag;

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	int			id;

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	struct mISDNchannel	*up;

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	signed char		sapi;

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	signed char		tei;

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	struct laddr		addr;

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	u_int			maxlen;

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	struct teimgr		*tm;

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	u_int			vs, va, vr;

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	int			rc;

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	u_int			window;

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	u_int			sow;

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	struct FsmInst		l2m;

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	struct FsmTimer		t200, t203;

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	int			T200, N200, T203;

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	u_int			next_id;

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	u_int			down_id;

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	struct sk_buff		*windowar[MAX_WINDOW];

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	struct sk_buff_head	i_queue;

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	struct sk_buff_head	ui_queue;

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	struct sk_buff_head	down_queue;

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	struct sk_buff_head	tmp_queue;

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};

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enum {

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	ST_L2_1,

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	ST_L2_2,

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	ST_L2_3,

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	ST_L2_4,

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	ST_L2_5,

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	ST_L2_6,

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	ST_L2_7,

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	ST_L2_8,

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};

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#define L2_STATE_COUNT (ST_L2_8+1)

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extern struct layer2	*create_l2(struct mISDNchannel *, u_int,

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				u_long, int, int);

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extern int		tei_l2(struct layer2 *, u_int, u_long arg);

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/* from tei.c */

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extern int 		l2_tei(struct layer2 *, u_int, u_long arg);

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extern void 		TEIrelease(struct layer2 *);

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extern int 		TEIInit(u_int *);

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extern void 		TEIFree(void);

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#define MAX_L2HEADER_LEN 4

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#define RR	0x01

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#define RNR	0x05

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#define REJ	0x09

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#define SABME	0x6f

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#define SABM	0x2f

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#define DM	0x0f

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#define UI	0x03

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#define DISC	0x43

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#define UA	0x63

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#define FRMR	0x87

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#define XID	0xaf

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#define CMD	0

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#define RSP	1

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#define LC_FLUSH_WAIT 1

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#define FLG_LAPB	0

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#define FLG_LAPD	1

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#define FLG_ORIG	2

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#define FLG_MOD128	3

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#define FLG_PEND_REL	4

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#define FLG_L3_INIT	5

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#define FLG_T200_RUN	6

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#define FLG_ACK_PEND	7

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#define FLG_REJEXC	8

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#define FLG_OWN_BUSY	9

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#define FLG_PEER_BUSY	10

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#define FLG_DCHAN_BUSY	11

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#define FLG_L1_ACTIV	12

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#define FLG_ESTAB_PEND	13

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#define FLG_PTP		14

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#define FLG_FIXED_TEI	15

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#define FLG_L2BLOCK	16

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#define FLG_L1_NOTREADY	17

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#define FLG_LAPD_NET	18

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