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See my comments below.

Best regards
Michael

Michael Tuexen Tel.: +49 89 722 47210
Siemens AG Fax: +49 89 722 48212
ICN WN CS SE 51 E-mail:
Michael.Tuexen AT icn.siemens.de

> -----Original Message-----
> From: Yiwen Jiang
> [SMTP:Yiwen.Jiang AT tic.siemens.ca]
> Sent: Tuesday, April 03, 2001 11:12 PM
> To:
> 'discussion AT sctp.de'
> Subject: RE: Re(2): [SCTP-Discussion] appropriate usage of
> echo_server/ech o_clien t and discard_server/t erminal demo programs
>
> Hi Michael,
>
> > >Ahh... I kinda guessed that was the issue, and tried to do this on 2
> > >machines, and got into another problem... I discovered that
> > if I specify the
> > >server address to be: 127.0.0.1, the programs (any pair) behave
> > >differently... but if I specify the actual server address to
> > be somewhat
> > >reasonable, all works! This is why it didn't work on 2
> > machines for me
> > >initially.
> > >
> > >My question now would be, shouldn't the SCTP library translates the
> > >127.0.0.1 to its real net address before sending packets to
> > the client and
> > >vice versa (well, really the client is another running server)??
> > What is the "real net address"? This is a difficult question,
> > especially
> > if IPv6 comes into the game ...
> hmm... well, the host IP address, but *not* the loopback address. I'm not
> familiar with IPv6 at all, so cannot comment on that one. :( I would assume
> that there is a unique IP address (be it v6 or not) that can uniquely
> identify the host machine...
[Tuexen Michael] If the host is multihomed (something
usual if you are using SCTP) there is no special
IP-address identifying the host. And the problem is not
usig 127.0.0.1 with SCTP but having running multiple
UNIX processes which use our library. Therefore we will
support having multiple processes but with different
IP-Addresses. But this does not enable you to run client
and server on the same host. Nevertheless it should be possible
to run client and server in the same process (never tested ...)
> > Maybe it would be good for the demo applications that if you use no
> > -s parameters all possible ip addresses would be used. Something which
> > has nothing to do with the sctp stuff.
> Or to have the demo server to check to see if there is a loopback address
> specified? Or, should this be done in the SCTP library? Just that I can see
> people using 127.0.0.1 as server address without realizing the consequences
> of it.
[Tuexen Michael] I think we have to make it clear in the
documentation.

> _______________________________________________
> discussion mailing list
> discussion AT sctp.de
> http://www.sctp.de/mailman/listinfo/discussion

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• RE: Re(2): [SCTP-Discussion] appropriate usage of echo_server/ech o_clien t and discard_server/t erminal demo programs, Tuexen Michael, 04/04/2001
  • <Possible follow-up(s)>
  • RE: Re(2): [SCTP-Discussion] appropriate usage of echo_server/ech o_clien t and discard_server/t erminal demo programs, Yiwen Jiang, 04/04/2001
  • RE: Re(2): [SCTP-Discussion] appropriate usage of echo_server/ech o_clien t and discard_server/t erminal demo programs, Tuexen Michael, 04/04/2001
  • RE: Re(2): [SCTP-Discussion] appropriate usage of echo_server/ech o_clien t and discard_server/t erminal demo programs, Yiwen Jiang, 04/04/2001
  • RE: Re(2): [SCTP-Discussion] appropriate usage of echo_server/ech o_clien t and discard_server/t erminal demo programs, Tuexen Michael, 04/04/2001

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