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- .\" @(#)3.t 6.5 (Berkeley) 4/17/91
- .\"
- .nr H2 1
- .\".ds RH Goals
- .br
- .ne 2i
- .NH
- \s+2Goals\s0
- .PP
- The networking system was designed with the goal of supporting
- multiple \fIprotocol families\fP and addressing styles. This required
- information to be ``hidden'' in common data structures which
- could be manipulated by all the pieces of the system, but which
- required interpretation only by the protocols which ``controlled''
- it. The system described here attempts to minimize
- the use of shared data structures to those kept by a suite of
- protocols (a \fIprotocol family\fP), and those used for rendezvous
- between ``synchronous'' and ``asynchronous'' portions of the
- system (e.g. queues of data packets are filled at interrupt
- time and emptied based on user requests).
- .PP
- A major goal of the system was to provide a framework within
- which new protocols and hardware could be easily be supported.
- To this end, a great deal of effort has been extended to
- create utility routines which hide many of the more
- complex and/or hardware dependent chores of networking.
- Later sections describe the utility routines and the underlying
- data structures they manipulate.
-