67 lines
3.0 KiB
Perl
67 lines
3.0 KiB
Perl
.\" Copyright (c) 1983, 1986, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)1.t 8.1 (Berkeley) 6/8/93
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.\"
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.\".ds RH Introduction
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.br
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.ne 2i
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.NH
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\s+2Introduction\s0
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.PP
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This report describes the internal structure of
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facilities added to the
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4.2BSD version of the UNIX operating system for
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the VAX,
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as modified in the 4.4BSD release.
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The system facilities provide
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a uniform user interface to networking
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within UNIX. In addition, the implementation
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introduces a structure for network communications which may be
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used by system implementors in adding new networking
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facilities. The internal structure is not visible
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to the user, rather it is intended to aid implementors
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of communication protocols and network services by
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providing a framework which
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promotes code sharing and minimizes implementation effort.
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.PP
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The reader is expected to be familiar with the C programming
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language and system interface, as described in the
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\fIBerkeley Software Architecture Manual, 4.4BSD Edition\fP [Joy86].
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Basic understanding of network
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communication concepts is assumed; where required
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any additional ideas are introduced.
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.PP
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The remainder of this document
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provides a description of the system internals,
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avoiding, when possible, those portions which are utilized only
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by the interprocess communication facilities.
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