usr/src/sys/netns/ns.h

/*
 * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
 * 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 the University of California, Berkeley.  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.
 *
 *      @(#)ns.h        7.4 (Berkeley) 6/29/88
 */

/*
 * 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_short         sns_family;
        struct ns_addr  sns_addr;
        char            sns_zero[2];
};
#define sns_port sns_addr.x_port

#ifdef vax
#define ns_netof(a) (*(long *) & ((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;
u_short ns_cksum();
#endif