/* $Copyright:	$
 * Copyright (c) 1984, 1985, 1986, 1987, 1988, 1989, 1990 
 * Sequent Computer Systems, Inc.   All rights reserved.
 *  
 * This software is furnished under a license and may be used
 * only in accordance with the terms of that license and with the
 * inclusion of the above copyright notice.   This software may not
 * be provided or otherwise made available to, or used by, any
 * other person.  No title to or ownership of the software is
 * hereby transferred.
 */

/*	Copyright (c) 1984 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

#ident	"$Header: pk.h 1.4 89/10/10 $@(#)uucp:pk.h	2.2.1.1"


#define	PACKSIZE	64
#define	WINDOWS		7
#define	PKASSERT(e, s1, s2, i1) if (!(e)) {\
assert(s1, s2, i1, __FILE__, __LINE__);\
pkfail();};

struct header {
	char	sync;
	char	ksize;
	unsigned short sum;
	char	cntl;
	char	ccntl;
};
#define	HDRSIZ	6

struct pack {
	short	p_state;	/* line state */
	short	p_bits;		/* mask for getepack */
	short	p_rsize;	/* input packet size */
	short	p_xsize;	/* output packet size */
	struct	header p_ihbuf;	/* input header */
	struct	header p_ohbuf; /* output header */
	char	*p_rptr;
	char	p_mode;
	char	**p_ipool;
	char	p_xcount;	/* # active output buffers */
	char	p_rcount;
	char	p_nout,p_tout;
	char	p_lpsize;	/* log(psize/32) */
	char	p_timer;
	char	p_obusy;
	char	p_srxmit;
	char	p_rwindow;	/* window size */
	char	p_swindow;
	char	p_msg;		/* control msg */
	char	p_rmsg;		/* repeated control msg */
	char	p_ps,p_pr;	/* last packet sent, recv'd */
	char	p_rpr;
	char	p_nxtps;	/* next output seq number */
	char	p_imap;		/* bit map of input buffers */
	char	p_pscopy;	/* newest output packet */
	char	*p_ob[8];	/* output buffers */
	char	*p_ib[8];	/* input buffers */
	char	p_os[8];	/* output buffer status */
	char	p_is[8];	/* input buffer status */
	short	p_osum[8];	/* output checksums */
	short	p_isum[8];	/* input checksums */
	int	p_ifn, p_ofn;
};
#define	CHECK	0125252
#define	SYN	020
#define	MOD8	7
#define	ISCNTL(a)	((a & 0300)==0)
#ifndef MIN
#define	MIN(a,b)	((a<b)? a:b)
#endif

extern char	next[8];
extern char	mask[8];
extern int	npbits;
extern int	pkactive;

/*
 * driver state
 */
#define	DEAD	0
#define	INITa	1
#define	INITb	2
#define	INITab	3
#define	LIVE	010
#define	RXMIT	020
#define	RREJ	040
#define PDEBUG	0200
#define	DRAINO	0400
#define	WAITO	01000
#define	DOWN	02000
#define	RCLOSE	04000
#define	BADFRAME 020000

/*
 * io buffer states
 */
#define	B_NULL	0
#define	B_READY	1
#define	B_SENT	2
#define	B_RESID	010
#define	B_COPY	020
#define	B_MARK	040
#define	B_SHORT	0100

/*
 * control messages
 */
#define	CLOSE	1
#define	RJ	2
#define	SRJ	3
#define	RR	4
#define	INITC	5
#define	INITB	6
#define	INITA	7

#define	M_RJ	4
#define	M_SRJ	010
#define	M_RR	020
#define	M_INITC	040
#define	M_CLOSE	2
#define	M_INITA	0200
#define	M_INITB	0100



#define	PKOPRI	31
#define	PKIPRI	30

#define	NPLINES	20

/*
 * packet ioctl buf
 */
struct	piocb {
	unsigned t;
	short	psize;
	short	mode;
	short	state;
	char	window;
};

extern int pkdebug;
extern int pksizes[];
