/*
 * $Id: in.h,v 1.6 1993/06/04 11:16:15 jraja Exp $
 *
 * HISTORY
 * $Log: in.h,v $
 * Revision 1.6  1993/06/04  11:16:15  jraja
 * Fixes for first public release.
 *
 * Revision 1.5  1993/04/13  22:07:58  jraja
 * Added inclusion of sys/param.h, which include htons() et al, since many
 * BSD programs think that they should be included from here.
 *
 * Revision 1.4  93/03/06  02:14:28  02:14:28  jraja (Jarno Tapio Rajahalme)
 * Made INADDR_ANY visible in AmiTCP even in KERNEL, since library functions
 * need it.
 * 
 * Revision 1.3  93/03/03  22:07:51  22:07:51  jraja (Jarno Tapio Rajahalme)
 *  Changed explicit prototypes back.
 * 
 * Revision 1.2  93/03/03  21:55:25  21:55:25  jraja (Jarno Tapio Rajahalme)
 * Added #ifndef to prevent multiple inclusion.
 * 
 * Revision 1.1  92/11/17  16:47:45  16:47:45  jraja (Jarno Tapio Rajahalme)
 * Initial revision
 * 
 *
 */

/*
 * Copyright (c) 1982, 1986, 1990 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)in.h	7.11 (Berkeley) 4/20/91
 */

#ifndef IN_H
#define IN_H

/*
 * Macros for network/external number representation conversion.
 */
#ifndef ntohl
#define	ntohl(x)	(x)
#define	ntohs(x)	(x)
#define	htonl(x)	(x)
#define	htons(x)	(x)

#define	NTOHL(x)	(x)
#define	NTOHS(x)	(x)
#define	HTONL(x)	(x)
#define	HTONS(x)	(x)
#endif

/*
 * Constants and structures defined by the internet system,
 * Per RFC 790, September 1981.
 */

/*
 * Protocols
 */
#define	IPPROTO_IP		0		/* dummy for IP */
#define	IPPROTO_ICMP		1		/* control message protocol */
#define	IPPROTO_GGP		3		/* gateway^2 (deprecated) */
#define	IPPROTO_TCP		6		/* tcp */
#define	IPPROTO_EGP		8		/* exterior gateway protocol */
#define	IPPROTO_PUP		12		/* pup */
#define	IPPROTO_UDP		17		/* user datagram protocol */
#define	IPPROTO_IDP		22		/* xns idp */
#define	IPPROTO_TP		29 		/* tp-4 w/ class negotiation */
#define	IPPROTO_EON		80		/* ISO cnlp */

#define	IPPROTO_RAW		255		/* raw IP packet */
#define	IPPROTO_MAX		256


/*
 * Local port number conventions:
 * Ports < IPPORT_RESERVED are reserved for
 * privileged processes (e.g. root).
 * Ports > IPPORT_USERRESERVED are reserved
 * for servers, not necessarily privileged.
 */
#define	IPPORT_RESERVED		1024
#define	IPPORT_USERRESERVED	5000

/*
 * Internet address (a structure for historical reasons)
 */
struct in_addr {
	u_long s_addr;
};

/*
 * Definitions of bits in internet address integers.
 * On subnets, the decomposition of addresses to host and net parts
 * is done according to subnet mask, not the masks here.
 */
#define	IN_CLASSA(i)		(((long)(i) & 0x80000000) == 0)
#define	IN_CLASSA_NET		0xff000000
#define	IN_CLASSA_NSHIFT	24
#define	IN_CLASSA_HOST		0x00ffffff
#define	IN_CLASSA_MAX		128

#define	IN_CLASSB(i)		(((long)(i) & 0xc0000000) == 0x80000000)
#define	IN_CLASSB_NET		0xffff0000
#define	IN_CLASSB_NSHIFT	16
#define	IN_CLASSB_HOST		0x0000ffff
#define	IN_CLASSB_MAX		65536

#define	IN_CLASSC(i)		(((long)(i) & 0xe0000000) == 0xc0000000)
#define	IN_CLASSC_NET		0xffffff00
#define	IN_CLASSC_NSHIFT	8
#define	IN_CLASSC_HOST		0x000000ff

#define	IN_CLASSD(i)		(((long)(i) & 0xf0000000) == 0xe0000000)
#define	IN_MULTICAST(i)		IN_CLASSD(i)

#define	IN_EXPERIMENTAL(i)	(((long)(i) & 0xe0000000) == 0xe0000000)
#define	IN_BADCLASS(i)		(((long)(i) & 0xf0000000) == 0xf0000000)

#define	INADDR_ANY		(u_long)0x00000000
#define	INADDR_BROADCAST	(u_long)0xffffffff	/* must be masked */
#if !defined(KERNEL) || defined(AMITCP)
#define	INADDR_NONE		0xffffffff		/* -1 return */
#endif

#define	IN_LOOPBACKNET		127			/* official! */

/*
 * Socket address, internet style.
 */
struct sockaddr_in {
	u_char	sin_len;
	u_char	sin_family;
	u_short	sin_port;
	struct	in_addr sin_addr;
	char	sin_zero[8];
};

/*
 * Structure used to describe IP options.
 * Used to store options internally, to pass them to a process,
 * or to restore options retrieved earlier.
 * The ip_dst is used for the first-hop gateway when using a source route
 * (this gets put into the header proper).
 */
struct ip_opts {
	struct	in_addr ip_dst;		/* first hop, 0 w/o src rt */
	char	ip_opts[40];		/* actually variable in size */
};

/*
 * Options for use with [gs]etsockopt at the IP level.
 * First word of comment is data type; bool is stored in int.
 */
#define	IP_OPTIONS	1	/* buf/ip_opts; set/get IP per-packet options */
#define	IP_HDRINCL	2	/* int; header is included with data (raw) */
#define	IP_TOS		3	/* int; IP type of service and precedence */
#define	IP_TTL		4	/* int; IP time to live */
#define	IP_RECVOPTS	5	/* bool; receive all IP options w/datagram */
#define	IP_RECVRETOPTS	6	/* bool; receive IP options for response */
#define	IP_RECVDSTADDR	7	/* bool; receive IP dst addr w/datagram */
#define	IP_RETOPTS	8	/* ip_opts; set/get IP per-packet options */

#ifdef KERNEL
struct in_addr in_makeaddr(u_long net,
                           u_long host);
u_long in_netof(struct in_addr in);
u_long in_lnaof(struct in_addr in);
#endif

#endif /* !IN_H */