text: /*	$NetBSD: ns.h,v 1.10 1997/07/18 19:30:35 thorpej Exp $	*/
  
  /*
   * Copyright (c) 1984, 1985, 1986, 1987, 1993
   *	The 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.
   *
   *	@(#)ns.h	8.1 (Berkeley) 6/10/93
   */
  
  /*
   * Constants and Structures defined by the Xerox Network Software
   * per "Internet Transport Protocols", XSIS 028112, December 1981
   */
  
  /*
   * Protocols
   */
  #define NSPROTO_RI	1		/* Routing Information */
  #define NSPROTO_ECHO	2		/* Echo Protocol */
  #define NSPROTO_ERROR	3		/* Error Protocol */
  #define NSPROTO_PE	4		/* Packet Exchange */
  #define NSPROTO_SPP	5		/* Sequenced Packet */
  #define NSPROTO_RAW	255		/* Placemarker*/
  #define NSPROTO_MAX	256		/* Placemarker*/
  
  
  /*
   * Port/Socket numbers: network standard functions
   */
  
  #define NSPORT_RI	1		/* Routing Information */
  #define NSPORT_ECHO	2		/* Echo */
  #define NSPORT_RE	3		/* Router Error */
  
  /*
   * Ports < NSPORT_RESERVED are reserved for priveleged
   * processes (e.g. root).
   */
  #define NSPORT_RESERVED		3000
  
  /* flags passed to ns_output as last parameter */
  
  #define	NS_FORWARDING		0x1		/* most of idp header exists */
  #define	NS_ROUTETOIF		SO_DONTROUTE	/* bypass routing tables */
  #define	NS_ALLOWBROADCAST	SO_BROADCAST	/* can send broadcast packets */
  
  #define NS_MAXHOPS		15
  
  /* flags passed to get/set socket option */
  #define	SO_HEADERS_ON_INPUT	1
  #define	SO_HEADERS_ON_OUTPUT	2
  #define	SO_DEFAULT_HEADERS	3
  #define	SO_LAST_HEADER		4
  #define	SO_NSIP_ROUTE		5
  #define SO_SEQNO		6
  #define	SO_ALL_PACKETS		7
  #define SO_MTU			8
  
  
  /*
   * NS addressing
   */
  union ns_host {
  	u_int8_t	c_host[6];
  	u_int16_t	s_host[3];
  };
  
  union ns_net {
  	u_int8_t	c_net[4];
  	u_int16_t	s_net[2];
  };
  
  union ns_net_u {
  	union ns_net	net_e;
  	u_int32_t	long_e;
  };
  
  struct ns_addr {
  	union ns_net	x_net;
  	union ns_host	x_host;
  	u_int16_t	x_port;
  };
  
  /*
   * Socket address, Xerox style
   */
  struct sockaddr_ns {
  	u_char		sns_len;
  	u_char		sns_family;
  	struct ns_addr	sns_addr;
  	char		sns_zero[2];
  };
  #define sns_port sns_addr.x_port
  
  #ifdef vax
  #define ns_netof(a) (*(int32_t *) & ((a).x_net)) /* XXX - not needed */
  #endif
  #define ns_neteqnn(a,b) (((a).s_net[0]==(b).s_net[0]) && \
  					((a).s_net[1]==(b).s_net[1]))
  #define ns_neteq(a,b) ns_neteqnn((a).x_net, (b).x_net)
  #define satons_addr(sa)	(((struct sockaddr_ns *)&(sa))->sns_addr)
  #define ns_hosteqnh(s,t) ((s).s_host[0] == (t).s_host[0] && \
  	(s).s_host[1] == (t).s_host[1] && (s).s_host[2] == (t).s_host[2])
  #define ns_hosteq(s,t) (ns_hosteqnh((s).x_host,(t).x_host))
  #define ns_nullhost(x) (((x).x_host.s_host[0]==0) && \
  	((x).x_host.s_host[1]==0) && ((x).x_host.s_host[2]==0))
  
  #ifdef _KERNEL
  extern struct domain nsdomain;
  union ns_host ns_thishost;
  union ns_host ns_zerohost;
  union ns_host ns_broadhost;
  union ns_net ns_zeronet;
  union ns_net ns_broadnet;
  
  #define	satosns(sa)	((struct sockaddr_ns *)(sa))
  #define	snstosa(sns)	((struct sockaddr *)(sns))
  #else
  
  #include <sys/cdefs.h>
  
  __BEGIN_DECLS
  extern struct ns_addr ns_addr __P((const char *));
  extern char *ns_ntoa __P((struct ns_addr));
  __END_DECLS
  
  #endif
  