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Dear all,
see my comments below.
Best regards
Michael

Thomas Dreibholz wrote:
>
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> Am Dienstag, 11. September 2001 14:28 schrieb Dilip:
> > Hi
> >
> > The socket api allows us to have features similar to
> > the normal socket api for TCP/UDP.
> >
> > Does the SCTP socket api support the feature of
> > select()
> > if not can anyone suggest how to have a server which
> > is single threaded concurrent.
>
> select() is not implemented in the current version of the socket API. This
> will be implemented in a future version. At the moment, you can use threads
> to simultaneously serve several clients (see sctpmultiserver.cc for a
> complete C++ example).
There will be C based examples with the next release. You can NOT write
a single thread concurrent server right now. After an implementation of a
ext_select call you can, but this is for a future release.
>
> > If I fork a process will the new process get the SCTP
> > support?? (as I understand that we cant have 2 SCTP
> > applications running on the same host)
>
> This is possible if sctpd is used instead of the original sctplib. The sctpd
> server contains the sctplib instance. sctpd clients use this single instance
> via this server.
> Note: The socket API has not been tested with sctpd yet!
You can NOT use fork in combination with the sctpd. And even if we
have implemented the socket_api on top of the sctpd, you will have to
use an ext_fork() call which does more that simply fork.
>
> > ---
> > Also when I terminate the client (Ctrl-C) the server
> > doesnt get the LOST communication.. it still runs
> > assuming the client to be there...
>
> Which client program do you use? If you use "sctpterminal" in the
> socket_programs directory, the Ctrl-C signal is intercepted by the program
> (using a signal handler) and a clean shutdown is made. If you use
> "terminal",
> Ctrl-C immediately stops the program and therefore the complete SCTP
> instance. A shutdown is not sent to the server and so it does not recognise
> the terminal program's removal.
That is correct. Even in the C based examples you to give to sctp thread time
to complete its work. This is different from a kernel implementation.
>
> Best regards
> - --
> =======================================================================
> Dipl.-Inform. Thomas Dreibholz
>
> University of Essen, Office ES210
> Inst. for Experimental Mathematics Ellernstraße 29
> Computer Networking Technology Group D-45326 Essen/Germany
> - -----------------------------------------------------------------------
> E-Mail:
> dreibh AT exp-math.uni-essen.de
> Homepage: http://www.exp-math.uni-essen.de/~dreibh
> =======================================================================
>
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• [SCTP-Discussion] Socket API Question, Dilip, 09/11/2001
  • Re: [SCTP-Discussion] Socket API Question, Thomas Dreibholz, 09/11/2001
    • Re: [SCTP-Discussion] Socket API Question, Michael Tuexen, 09/11/2001
  • [SCTP-Discussion] T2 timer value, Nahar,virendra, 09/20/2001

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