[erlang-questions] Low Level Socket Example

Marc Eisenbarth Marc_Eisenbarth@REDACTED
Tue Aug 12 23:19:15 CEST 2008

Thank you for the encouragement. At this point I have a copy of a paper by Paris, Gulias, and Valderruten as well as the released source code from a second project by Torbjörn Törnkvist. 

I think this will be plenty of information to digest :)

-------- Original-Nachricht --------
> Datum: Tue, 12 Aug 2008 16:46:00 -0400
> Von: Serge Aleynikov <saleyn@REDACTED>
> An: Marc Eisenbarth <Marc_Eisenbarth@REDACTED>
> CC: Sargun Dhillon <xbmodder@REDACTED>, erlang-questions@REDACTED
> Betreff: Re: [erlang-questions] Low Level Socket Example

> If you are interested in learning the details of network protocols, 
> Erlang could be your friend for the task as a rapid prototyping 
> framework.  You have to be aware though that a TCP stack in Erlang will 
> not deliver the same performance as the kernel-level stack 
> implementation.  However it is doable as a proof of concept.
> The network driver that comes with Erlang is not suited for this task, 
> as it serves as a bridge between TCP/SCTP/UDP protocols and the 
> emulator.  So if you really have interest in accessing raw sockets, 
> you'd need to write a driver in C/C++  to marshal raw packets between 
> user-level POSIX API and an Erlang process.
> Serge
> Marc Eisenbarth wrote:
> >> Why can't you use gen_tcp? Do you really need to implement OS level
> APIs
> >> in
> >> Erlang? Erlang really isn't the right language for raw socket
> >> manipulation.
> >> Try out C.
> > 
> > gen_tcp will do the entire TCP session setup for me, so it's not
> appropriate for my task. Just because C might be better for this task, doesn't
> mean it's better for the rest of my program. In fact, there's are at least 2
> examples of projects that implement network stacks in Erlang, so at least a
> few people out there that would disagree with you and instead agree that
> there is some merit in using Erlang :)

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