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

1.1     ! root        1: .\" Copyright (c) 1990 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted
        !             5: .\" provided that: (1) source distributions retain this entire copyright
        !             6: .\" notice and comment, and (2) distributions including binaries display
        !             7: .\" the following acknowledgement:  ``This product includes software
        !             8: .\" developed by the University of California, Berkeley and its contributors''
        !             9: .\" in the documentation or other materials provided with the distribution
        !            10: .\" and in all advertising materials mentioning features or use of this
        !            11: .\" software. Neither the name of the University nor the names of its
        !            12: .\" contributors may be used to endorse or promote products derived
        !            13: .\" from this software without specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            15: .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            16: .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)iso.4       6.1 (Berkeley) 5/30/90
        !            19: .\"
        !            20: .TH ISO 4F "May 30, 1990"
        !            21: .UC  4
        !            22: .SH NAME
        !            23: iso \- ISO protocol family
        !            24: .SH SYNOPSIS
        !            25: .B #include <sys/types.h>
        !            26: .br
        !            27: .B #include <netiso/iso.h>
        !            28: .SH DESCRIPTION
        !            29: The ISO protocol family is a collection of protocols
        !            30: that uses the ISO address format.
        !            31: The ISO family provides protocol support for the
        !            32: SOCK_SEQPACKET abstraction through the TP protocol (ISO 8073), 
        !            33: for the SOCK_DGRAM abstraction through the connectionless transport
        !            34: protocol (ISO 8602),
        !            35: and for the SOCK_RAW abstraction
        !            36: by providing direct access (for debugging) to the
        !            37: CLNP (ISO 8473) network layer protocol.
        !            38: .SH ADDRESSING
        !            39: ISO addresses are based upon ISO 8348/AD2, 
        !            40: "Addendum to the Network Service Definition Covering Network Layer Addressing."
        !            41: .PP
        !            42: Sockets bound to the OSI protocol family use
        !            43: the following address structure:
        !            44: .sp 1
        !            45: .nf
        !            46: ._f
        !            47: struct iso_addr {
        !            48:        u_char  isoa_len;               /* length, not including this byte */
        !            49:        char    isoa_genaddr[20];       /* general opaque address */
        !            50: };
        !            51: 
        !            52: struct sockaddr_iso {
        !            53:        u_char  siso_len;               /* size of this sockaddr */
        !            54:        u_char  siso_family;            /* addressing domain, AF_ISO */
        !            55:        u_char  siso_plen;              /* presentation selector length */
        !            56:        u_char  siso_slen;              /* session selector length */
        !            57:        u_char  siso_tlen;              /* transport selector length */
        !            58:        struct  iso_addr siso_addr;     /* network address */
        !            59:        u_char  siso_pad[6];            /* space for gosip v2 SELs */
        !            60: };
        !            61: #define siso_nlen siso_addr.isoa_len
        !            62: #define siso_data siso_addr.isoa_genaddr
        !            63: .sp 1
        !            64: .fi
        !            65: .PP
        !            66: The fields of this structure are:
        !            67: .TP 10
        !            68: \fIsiso_len:\fR
        !            69: Length of the entire address structure, in bytes, which may grow to
        !            70: be longer than the 32 bytes show above.
        !            71: .TP 10
        !            72: \fIsiso_family:\fR
        !            73: Identifies the domain: AF_ISO.
        !            74: .TP 10
        !            75: \fIsiso_tlen:\fR
        !            76: Length of the transport selector.
        !            77: .TP 10
        !            78: \fIsiso_slen:\fR
        !            79: Length of the session selector.
        !            80: This is not currently supported by the kernel and is provided as
        !            81: a convenience for user level programs.
        !            82: .TP 10
        !            83: \fIsiso_plen:\fR
        !            84: Length of the presentation selector.
        !            85: This is not currently supported by the kernel and is provided as
        !            86: a convenience for user level programs.
        !            87: .TP 10
        !            88: \fIsiso_addr:\fR
        !            89: The network part of the address, described below.
        !            90: .SS TRANSPORT ADDRESSING
        !            91: .PP
        !            92: An ISO transport address is similar to an Internet address in that
        !            93: it contains a network-address portion and a portion that the
        !            94: transport layer uses to multiplex its services among clients.
        !            95: In the Internet domain, this portion of the address is called a \fIport\fR.
        !            96: In the ISO domain, this is called a \fItransport selector\fR
        !            97: (also known at one time as a \fItransport suffix\fR).
        !            98: While ports are always 16 bits, 
        !            99: transport selectors may be
        !           100: of (almost) arbitrary size.
        !           101: .PP
        !           102: Since the C language does not provide conveninent variable
        !           103: length structures, we have separated the selector lengths
        !           104: from the data themselves.
        !           105: The network address and various selectors are stored contiguously,
        !           106: with the network address first, then the transport selector, and so
        !           107: on.  Thus, if you had a nework address of less then 20 bytes,
        !           108: the transport selector would encroach on space normally reserved
        !           109: for the network address.
        !           110: .PP
        !           111: .SS NETWORK ADDRESSING.
        !           112: ISO network addresses are limited to 20 bytes in length.
        !           113: ISO network addresses can take any format.
        !           114: .SH PROTOCOLS
        !           115: The ARGO 1.0 implementation of the 
        !           116: ISO protocol family comprises
        !           117: the Connectionless-Mode Network Protocol (CLNP), 
        !           118: and the Transport Protocol (TP), classes 4 and 0,
        !           119: and X.25.
        !           120: TP is used to support the SOCK_SEQPACKET
        !           121: abstraction.
        !           122: A raw interface to CLNP is available
        !           123: by creating an ISO socket of type SOCK_RAW.
        !           124: This is used for CLNP debugging only.
        !           125: .SH SEE ALSO
        !           126: tp(4), clnp(4), cltp(4)

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