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Annotation of 43BSDReno/share/doc/smm/15.net/3.t, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983, 1986 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 the above copyright notice and this paragraph are
                      6: .\" duplicated in all such forms and that any documentation,
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                      8: .\" distribution and use acknowledge that the software was developed
                      9: .\" by the University of California, Berkeley.  The name of the
                     10: .\" University may not be used to endorse or promote products derived
                     11: .\" from this software without specific prior written permission.
                     12: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     13: .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     14: .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     15: .\"
                     16: .\"    @(#)3.t 6.4 (Berkeley) 3/7/89
                     17: .\"
                     18: .nr H2 1
                     19: .\".ds RH Goals
                     20: .br
                     21: .ne 2i
                     22: .NH
                     23: \s+2Goals\s0
                     24: .PP
                     25: The networking system was designed with the goal of supporting
                     26: multiple \fIprotocol families\fP and addressing styles.  This required
                     27: information to be ``hidden'' in common data structures which
                     28: could be manipulated by all the pieces of the system, but which
                     29: required interpretation only by the protocols which ``controlled''
                     30: it.  The system described here attempts to minimize
                     31: the use of shared data structures to those kept by a suite of
                     32: protocols (a \fIprotocol family\fP), and those used for rendezvous
                     33: between ``synchronous'' and ``asynchronous'' portions of the
                     34: system (e.g. queues of data packets are filled at interrupt
                     35: time and emptied based on user requests).
                     36: .PP
                     37: A major goal of the system was to provide a framework within
                     38: which new protocols and hardware could be easily be supported.
                     39: To this end, a great deal of effort has been extended to
                     40: create utility routines which hide many of the more
                     41: complex and/or hardware dependent chores of networking.
                     42: Later sections describe the utility routines and the underlying
                     43: data structures they manipulate.

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