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steph (4655)

steph
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I am a Un*x, C, Perl, ksh, elisp hacker living in Madrid. I enjoy all kinds of Mathematics and the study of computer languages. Perl is my favourite language (often for the wrong reasons). I am sgt on Perl Monks; my skypeid is stephangt4.

Journal of steph (4655)

Thursday December 08, 2005
09:46 AM

a generic proxy (or port forwarder)

[ #27894 ]

On my local net, only a couple machines are "visible" from another coupled intranet, which means
that a client PC is subject to arbitrary connection
severing after a relatively short time...sic

it is clear that I need a port forwarder, and I need it fast (as usual)...this means perl and first CPAN to make sure I don't reinvent the obvious.

So I came across the Net::Server framework which has a multiplexer incarnation that seems promising; on the client side it is normally VERY protocol-oriented so as a basis I will use some code from Lincoln Stein's network book.

ok network code is only half the story, as I soon discover, the true question is when do I close a client connection? there are some obvious cases,
server closes its read end (or both) client says it's done; but what about mis-behaving or real slow clients etc....Humm need more thinking

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  • If you need it fast, don't build it. Hop on over to http://freshmeat.net/ [freshmeat.net] and download one. I like aproxy [freshmeat.net] but lots are available.

    -sam

    • thanks Sam. I tried aproxy and it's quite OK... actually I missed the issue completely with FTP which **does use two ports** apart from that I'll try to make an option to go non-blocking (especially the "forward" sub, maybe using something like Lincoln Stein's IO::SessionData).