/*
 * pppd.h - PPP daemon global declarations.
 *
 * Copyright © 1996 Digital Equipment Corporation.
 * All rights reserved.
 *
 * Copyright (c) 1989 Carnegie Mellon University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by Carnegie Mellon University.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * $Id: pppd.h,v 1.8 1995/04/26 06:46:31 paulus Exp $
 */

/* 
** This is a version of pppd that has been modified to only define the bits
** that are necessary to get a control protocol compile for VSM
*/

#ifndef _PPP_USR_H_
#define _PPP_USR_H_

/*
** Define standard types
*/
typedef char * caddr_t;
typedef unsigned char  u_char;
typedef unsigned short u_short;
typedef unsigned int   u_int;
typedef unsigned long  u_long;

/*
** Define macro for prototyping
*/
#ifndef __P
#ifdef __STDC__
#define __P(x)	x
#else
#define __P(x)	()
#endif
#endif

/*
 * A 32-bit unsigned integral type.
 */
#if !defined(__BIT_TYPES_DEFINED__) && !defined(_BITYPES)
#ifdef	UINT32_T
typedef UINT32_T	u_int32_t;
#else
typedef unsigned int	u_int32_t;
#endif
#endif

/*
 * Inline versions of get/put char/short/long.
 * Pointer is advanced; we assume that both arguments
 * are lvalues and will already be in registers.
 * cp MUST be u_char *.
 */
#define GETCHAR(c, cp) { \
	(c) = *(cp)++; \
}
#define PUTCHAR(c, cp) { \
	*(cp)++ = (u_char) (c); \
}


#define GETSHORT(s, cp) { \
	(s) = *(cp)++ << 8; \
	(s) |= *(cp)++; \
}
#define PUTSHORT(s, cp) { \
	*(cp)++ = (u_char) ((s) >> 8); \
	*(cp)++ = (u_char) (s); \
}

#define GETLONG(l, cp) { \
	(l) = *(cp)++ << 8; \
	(l) |= *(cp)++; (l) <<= 8; \
	(l) |= *(cp)++; (l) <<= 8; \
	(l) |= *(cp)++; \
}
#define PUTLONG(l, cp) { \
	*(cp)++ = (u_char) ((l) >> 24); \
	*(cp)++ = (u_char) ((l) >> 16); \
	*(cp)++ = (u_char) ((l) >> 8); \
	*(cp)++ = (u_char) (l); \
}

#define INCPTR(n, cp)	((cp) += (n))
#define DECPTR(n, cp)	((cp) -= (n))

#undef  FALSE
#define FALSE	0
#undef  TRUE
#define TRUE	1

#include "string.h"
#define BCOPY(s, d, l)		memcpy(d, s, l)
#define BZERO(s, n)		memset(s, 0, n)

#ifndef MIN
#define MIN(a, b)	((a) < (b)? (a): (b))
#endif
#ifndef MAX
#define MAX(a, b)	((a) > (b)? (a): (b))
#endif

#define PPP_HDRLEN	4	/* octets for standard ppp header */
#define PPP_FCSLEN	2	/* octets for FCS */
#define PPP_MRU		1500	/* default MRU = max length of info field */

/*
 * Significant octet values.
 */
#define	PPP_ALLSTATIONS	0xff	/* All-Stations broadcast address */
#define	PPP_UI		0x03	/* Unnumbered Information */
#define	PPP_FLAG	0x7e	/* Flag Sequence */
#define	PPP_ESCAPE	0x7d	/* Asynchronous Control Escape */
#define	PPP_TRANS	0x20	/* Asynchronous transparency modifier */

/*
 * Protocol field values.
 */
#define PPP_IP		0x21	/* Internet Protocol */
#define	PPP_VJC_COMP	0x2d	/* VJ compressed TCP */
#define	PPP_VJC_UNCOMP	0x2f	/* VJ uncompressed TCP */
#define PPP_COMP	0xfd	/* compressed packet */
#define PPP_IPCP	0x8021	/* IP Control Protocol */
#define PPP_CCP		0x80fd	/* Compression Control Protocol */
#define PPP_LCP		0xc021	/* Link Control Protocol */
#define PPP_PAP		0xc023	/* Password Authentication Protocol */
#define PPP_LQR		0xc025	/* Link Quality Report protocol */
#define PPP_CHAP	0xc223	/* Cryptographic Handshake Auth. Protocol */

/*
 * Packet header = Code, id, length.
 */
#define HEADERLEN	(sizeof (u_char) + sizeof (u_char) + sizeof (u_short))

/*
 *  CP (LCP, IPCP, etc.) codes.
 */
#define CONFREQ		1	/* Configuration Request */
#define CONFACK		2	/* Configuration Ack */
#define CONFNAK		3	/* Configuration Nak */
#define CONFREJ		4	/* Configuration Reject */
#define TERMREQ		5	/* Termination Request */
#define TERMACK		6	/* Termination Ack */
#define CODEREJ		7	/* Code Reject */

#endif /* _PPPUSR_H_ */