Subject: Re: [ecasound] Ecasound.NET
From: S. Massy (theanaloguekid_AT_tak.net.dhis.org)
Date: Fri Jun 28 2002 - 06:06:40 EEST
Just a quick one: What about authentication and session management?
On Fri, 28 Jun 2002, Kai Vehmanen <k_AT_eca.cx> wrote:
> Ok, not really. :) But I do intend to use the 'net'.. I mean why waste
> perfectly good marketing money! :)
> I've continued developing the 'shared access to ecasound sessions'
> concept. After considering a few different implementation approaches, I've
> come to the conclusion that extending the ECI API is by far the
> easiest and most flexible solution. Here's a short summary:
> 1. NetECI
> NetECI is a slightly modified version of the ECI API that allows
> applications to communicate with remote ecasound sessions. The
> basic use-case is:
> (machine-1) (machine-3)
> 'NetECI App A' <-- TCP/IP --> 'ecasound -c --daemon'
> (machine-2) |
> 'NetECI App B' <-- TCP/IP ---------|
> 2. ECI vs NetECI
> The only required API change is extending the init function. So instead of
> 'eci_init(void)' you'd have 'neteci_init(const char* hostname, int port)'.
> The NetECI library will handle all the network communication. App using
> NetECI can just issue EIAM commands as usual and not worry about the
> implementation details.
> 3. Protocol
> NetECI is really just a RPC-version (remote procedure call, or
> remote-invocation (RMI) for you java-men) of ECI. I could use any of the
> numerous available RPC mechanisms (Sun's RPC, CORBA, SOAP, KDE's DCOP,
> GNOME's Bonobo, XML-RPC, etc, etc) for the implementation, but I'm pretty
> certain won't. Instead the protocol will be a straightforward, text-based
> protocol using TCP/IP or UNIX-sockets. I can once again reuse the EIAM
> parser code in libecasound and use it this time as a protocol parser. This
> way there's really not that much new code for me to write.
> One interesting thing is that it will be quite easy to write a native
> implementation of the NetECI client side in perl, python, C, java, etc.
> You just need to handle the TCP/IP communication with the ecasound daemon
> and that's it, no need to link against libecasound or install glue-code
> like pyeca. Of course, using the C++ NetECI implementation would still be
> possible, too.
> The protocol itself will probably be a request-response system, where the
> request format is:
> <eiam-command> <arg1,...,argN><crlf>
> ... and the response:
> <return-code> <type> <return-value>
> So extremely simple. One possible problem is bandwidth usage, so I don't
> want to make the protocol overly complex. Any comments?
> Audio software for Linux!
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