diff options
Diffstat (limited to 'share/man/man4/iso.4')
| -rw-r--r-- | share/man/man4/iso.4 | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/share/man/man4/iso.4 b/share/man/man4/iso.4 new file mode 100644 index 0000000..c15e34c --- /dev/null +++ b/share/man/man4/iso.4 @@ -0,0 +1,186 @@ +.\" Copyright (c) 1990, 1991, 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. +.\" +.\" @(#)iso.4 8.2 (Berkeley) 11/30/93 +.\" +.Dd November 30, 1993 +.Dt ISO 4 +.Os +.Sh NAME +.Nm iso +.Nd +.Tn ISO +protocol family +.Sh SYNOPSIS +.Fd #include <sys/types.h> +.Fd #include <netiso/iso.h> +.Sh DESCRIPTION +The +.Tn ISO +protocol family is a collection of protocols +that uses the +.Tn ISO +address format. +The +.Tn ISO +family provides protocol support for the +.Dv SOCK_SEQPACKET +abstraction through the +.Tn TP +protocol +.Pf ( Tn ISO +8073), +for the +.Dv SOCK_DGRAM +abstraction through the connectionless transport +protocol +.Pf ( Tn ISO +8602), +and for the +.Dv SOCK_RAW +abstraction +by providing direct access (for debugging) to the +.Tn CLNP +.Pf ( Tn ISO +8473) network layer protocol. +.Sh ADDRESSING +.Tn ISO +addresses are based upon +.Tn ISO +8348/AD2, +.%T "Addendum to the Network Service Definition Covering Network Layer Addressing." +.Pp +Sockets bound to the OSI protocol family use +the following address structure: +.Bd -literal +struct iso_addr { + u_char isoa_len; /* length, not including this byte */ + char isoa_genaddr[20]; /* general opaque address */ +}; + +struct sockaddr_iso { + u_char siso_len; /* size of this sockaddr */ + u_char siso_family; /* addressing domain, AF_ISO */ + u_char siso_plen; /* presentation selector length */ + u_char siso_slen; /* session selector length */ + u_char siso_tlen; /* transport selector length */ + struct iso_addr siso_addr; /* network address */ + u_char siso_pad[6]; /* space for gosip v2 SELs */ +}; +#define siso_nlen siso_addr.isoa_len +#define siso_data siso_addr.isoa_genaddr +.Ed +.Pp +The fields of this structure are: +.Bl -tag -width Ds +.It Ar siso_len: +Length of the entire address structure, in bytes, which may grow to +be longer than the 32 bytes shown above. +.It Ar siso_family: +Identifies the domain: +.Dv AF_ISO . +.It Ar siso_tlen: +Length of the transport selector. +.It Ar siso_slen: +Length of the session selector. +This is not currently supported by the kernel and is provided as +a convenience for user level programs. +.It Ar siso_plen: +Length of the presentation selector. +This is not currently supported by the kernel and is provided as +a convenience for user level programs. +.It Ar siso_addr: +The network part of the address, described below. +.El +.Sh TRANSPORT ADDRESSING +.Pp +An +.Tn ISO +transport address is similar to an Internet address in that +it contains a network-address portion and a portion that the +transport layer uses to multiplex its services among clients. +In the Internet domain, this portion of the address is called a +.Em port . +In the +.Tn ISO +domain, this is called a +.Em transport selector +(also known at one time as a +.Em transport suffix ) . +While ports are always 16 bits, +transport selectors may be +of (almost) arbitrary size. +.Pp +Since the C language does not provide convenient variable +length structures, we have separated the selector lengths +from the data themselves. +The network address and various selectors are stored contiguously, +with the network address first, then the transport selector, and so +on. Thus, if you had a nework address of less then 20 bytes, +the transport selector would encroach on space normally reserved +for the network address. +.Pp +.Sh NETWORK ADDRESSING. +.Tn ISO +network addresses are limited to 20 bytes in length. +.Tn ISO +network addresses can take any format. +.Sh PROTOCOLS +The +.Tn ARGO +1.0 implementation of the +.Tn ISO +protocol family comprises +the Connectionless-Mode Network Protocol +.Pq Tn CLNP , +and the Transport Protocol +.Pq Tn TP , +classes 4 and 0, +and +.Tn X.25 . +.Tn TP +is used to support the +.Dv SOCK_SEQPACKET +abstraction. +A raw interface to +.Tn CLNP +is available +by creating an +.Tn ISO +socket of type +.Dv SOCK_RAW . +This is used for +.Tn CLNP +debugging only. +.Sh SEE ALSO +.Xr tp 4 , +.Xr clnp 4 , +.Xr cltp 4 |
