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/*

 * 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

 * $FreeBSD: src/sys/netns/ns.h,v 1.15 2002/03/20 02:39:27 alfred Exp $

 */

#ifndef _NETNS_NS_H_

#define _NETNS_NS_H_

/*

 * 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            0x10    /* same as SO_DONTROUTE */

#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_char  c_host[6];

        u_short s_host[3];

};

union ns_net {

        u_char  c_net[4];

        u_short s_net[2];

};

union ns_net_u {

        union ns_net    net_e;

        u_long          long_e;

};

struct ns_addr {

        union ns_net    x_net;

        union ns_host   x_host;

        u_short 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

#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;

u_short ns_cksum();

#else

#include <sys/cdefs.h>

__BEGIN_DECLS

extern struct ns_addr ns_addr(const char *);

extern char *ns_ntoa(struct ns_addr);

__END_DECLS

#endif

#endif