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Annotation of 43BSDReno/share/man/man4/nsip.4, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1985 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)nsip.4      1.3 (Berkeley) 6/23/90
        !            19: .\"
        !            20: .TH NSIP 4 "June 23, 1990"
        !            21: .UC 6
        !            22: .SH NAME
        !            23: nsip \- software network interface encapsulating ns packets in ip packets.
        !            24: .SH SYNOPSIS
        !            25: .B options NSIP
        !            26: .br
        !            27: .B #include <netns/ns_if.h>
        !            28: .SH DESCRIPTION
        !            29: The
        !            30: .I nsip
        !            31: interface is a software mechanism which may be
        !            32: used to transmit Xerox NS(tm) packets through otherwise uncooperative
        !            33: networks.
        !            34: It functions by prepending an IP header, and resubmitting the packet
        !            35: through the unix IP machinery.
        !            36: .LP
        !            37: The super-user can advise the operating system of a willing partner
        !            38: by naming an IP address to be associated with an NS address.
        !            39: Presently, only specific hosts pairs are allowed, and for each host
        !            40: pair, an artificial point-to-point interface is constructed.
        !            41: At some future date, IP broadcast addresses or hosts may be paired
        !            42: with NS networks or hosts.
        !            43: .LP
        !            44: Specifically, a socket option of SO_NSIP_ROUTE is set on a socket
        !            45: of family AF_NS, type SOCK_DGRAM, passing the following structure:
        !            46: .nf
        !            47: 
        !            48: struct nsip_req {
        !            49:        struct sockaddr rq_ns;  /* must be ns format destination */
        !            50:        struct sockaddr rq_ip;  /* must be ip format gateway */
        !            51:        short rq_flags;
        !            52: };
        !            53: 
        !            54: .SH DIAGNOSTICS
        !            55: \fBnsip%d: can't handle af%d\fP.  The interface was handed
        !            56: a message with addresses formatted in an unsuitable address
        !            57: family; the packet was dropped.
        !            58: .SH SEE ALSO
        !            59: intro(4), ns(4)
        !            60: .SH BUGS
        !            61: It is absurd to have a separate pseudo-device for each pt-to-pt
        !            62: link.
        !            63: There is no way to change the IP address for an NS host once the
        !            64: the encapsulation interface is set up.
        !            65: The request should honor flags of RTF_GATEWAY to indicate
        !            66: remote networks, and the absence of RTF_UP should be a clue
        !            67: to remove that partner.
        !            68: This was intended to postpone the necessity of rewriting reverse ARP
        !            69: for the 
        !            70: .B en
        !            71: device, and to allow passing XNS packets through an
        !            72: Arpanet-Milnet gateway, to facilitate testing between some co-operating
        !            73: universities.

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