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From Luke Kenneth Casson Leighton <l...@samba-tng.org>
Subject Re: [RFC] Network Abstraction Layer
Date Wed, 28 Feb 2001 16:13:26 GMT
> So... that is the design we happen to be using in Apache, and is emboded in
> the various APR and APRUTIL bits. It might be interesting to determine
> whether a similar design would work for Samba's needs.

samba is an incredibly large monolith.  it is a combination of twelve to
fifteen separate entities, in only two programs, totalling 200,000 lines
of code (the rest is client-side programs).

to introduce some newbie programmer with lots of enthusiasm, or even an
experienced programmer with lots of expertise, into these 350,000 lines,
is asking a lot.

hence the TNG initiative, which subdivides along sensible lines into
separate programs and separate projects.  elrond, for example, has adopted
lsarpcd, which is only 15,000 or so lines (at a guess: he's done a lot of
work on it recently).

the buckets idea sounds like it is very fast, however my impression is
that it is asking programmers to follow some conventions [for decoding]
that an API would impose on them.

the buckets idea sounds similar to what ISS proposed for a redesign of
their RealSecure Engine, which would do multi-layered, multi-threaded
decoding of raw ethernet traffic into first ICMP and UDP, then hand-off to
handlers to do UDP to TCP conversion, then hand-off from the UDP and TCP
"buckets" to protocols such as SSL, http, pop3 etc etc, then hand-off from
SSL to http, pop3 etc etc: you get the idea.

all very fast, all in one program, all very integrated.

the TNG approach is to divide and conquer, which makes for scalability in
project management.


is it possible to wrap the buckets idea with this  network abstraction
layer idea?

i.e. to implement the NAP using the existing APRUTILS buckets code?


 ----- Luke Kenneth Casson Leighton <lkcl@samba-tng.org> -----

"i want a world of dreams, run by near-sighted visionaries"
"good.  that's them sorted out.  now, on _this_ world..."

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