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Annotation of 43BSDReno/share/man/man4/clnp.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: .\"    @(#)clnp.4      6.1 (Berkeley) 5/30/90
        !            19: .\"
        !            20: .TH CLNP 4 "May 30, 1990"
        !            21: .UC 4
        !            22: .SH NAME
        !            23: clnp \- Connectionless-Mode Network Protocol
        !            24: .SH SYNOPSIS
        !            25: .B #include <sys/socket.h>
        !            26: .br
        !            27: .B #include <netargo/iso.h>
        !            28: .br
        !            29: .B #include <netargo/clnp.h>
        !            30: .PP
        !            31: .B s = socket(AF_ISO, SOCK_RAW, 0);
        !            32: .SH DESCRIPTION
        !            33: CLNP is the connectionless-mode network protocol used by the 
        !            34: connectionless-mode network service. This protocol is specified in
        !            35: ISO 8473.
        !            36: It may be accessed
        !            37: through a \*(lqraw socket\*(rq for debugging purposes only.
        !            38: CLNP sockets are connectionless,
        !            39: and are normally used with the
        !            40: .I sendto 
        !            41: and
        !            42: .I recvfrom 
        !            43: calls, though the
        !            44: .IR connect (2)
        !            45: call may also be used to fix the destination for future
        !            46: packets (in which case the 
        !            47: .IR read (2)
        !            48: or
        !            49: .IR recv (2)
        !            50: and 
        !            51: .IR write (2)
        !            52: or
        !            53: .IR send (2)
        !            54: system calls may be used).
        !            55: .PP
        !            56: Outgoing packets automatically have a CLNP header prepended to
        !            57: them. Incoming packets received by the user contain the full CLNP header.
        !            58: The following \fIsetsockopt\fR options apply to CLNP:
        !            59: .TP
        !            60: CLNPOPT_FLAGS
        !            61: Sets the flags which are passed to clnp when sending a datagram.
        !            62: Valid flags are:
        !            63: .nf
        !            64: .br
        !            65: CLNP_NO_SEG-Do not allow segmentation
        !            66: CLNP_NO_ER-Suppress ER pdus
        !            67: CLNP_NO_CKSUM-Do not generate the CLNP checksum
        !            68: .br
        !            69: .fi
        !            70: .TP
        !            71: CLNPOPT_OPTS
        !            72: Sets CLNP options. The options must be formatted exactly as specified by
        !            73: ISO 8473, section 7.5 "Options Part." Once an option has been set, it will
        !            74: be sent on all packets until a different option is set.
        !            75: .SH "CONGESTION EXPERIENCE BIT"
        !            76: Whenever a packet is transmitted, the globally unique quality of
        !            77: service option is added to the packet. The sequencing preferred bit and
        !            78: the low transit delay bit are set in this option.
        !            79: .PP
        !            80: If a packet is forwarded containing the globally unique quality of
        !            81: service option, and the interface through which the packet will be 
        !            82: transmitted has a queue length greater than \fIcongest_threshold\fR,
        !            83: then the congestion experienced bit is set in the quality of service option.
        !            84: .PP
        !            85: The threshold value stored in \fIcongest_threshold\fR may be changed
        !            86: with the \fIclnlutil\fR utility.
        !            87: .PP
        !            88: When a packet is received with the 
        !            89: globally unique quality of service option present, and the
        !            90: congestion experienced bit is set, then the transport congestion
        !            91: control function is called.
        !            92: .SH DIAGNOSTICS
        !            93: A socket operation may fail with one of the following errors returned:
        !            94: .TP 15
        !            95: [EISCONN]
        !            96: when trying to establish a connection on a socket which
        !            97: already has one, or when trying to send a datagram with the destination
        !            98: address specified and the socket is already connected;
        !            99: .TP 15
        !           100: [ENOTCONN]
        !           101: when trying to send a datagram, but
        !           102: no destination address is specified, and the socket hasn't been
        !           103: connected;
        !           104: .TP 15
        !           105: [ENOBUFS]
        !           106: when the system runs out of memory for
        !           107: an internal data structure;
        !           108: .TP 15
        !           109: [EADDRNOTAVAIL]
        !           110: when an attempt is made to create a 
        !           111: socket with a network address for which no network interface
        !           112: exists;
        !           113: .TP 15
        !           114: [EHOSTUNREACH]
        !           115: when trying to send a datagram, but no route to the destination
        !           116: address exists.
        !           117: .TP 15
        !           118: [EINVAL]
        !           119: when specifying unsupported options.
        !           120: .SH SEE ALSO
        !           121: send(2), recv(2), intro(4), iso(4)
        !           122: .SH BUGS
        !           123: Packets are sent with the type code of 0x1d (technically an invalid
        !           124: packet type) for lack of a better way to identify raw CLNP packets.
        !           125: .PP
        !           126: No more than MLEN bytes of options can be specified.

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