Maarten Koopmans wrote:
> I know.... but I can't see that in Rebol.
>
> I am thinking of adding 'persistent connections' to Rugby but I need to know
> if the pipe is broken in order to do that.
error? try [insert port stuff] ? That's what Holger suggested me for my FastCGI
problems ...
-pekr-
>
>
> --Maarten
>
> On Tuesday 09 October 2001 10:53, you wrote:
> > You should have receive a notification that the connection has dropped
> > that's the nature of TCP!
> >
> >
> > -----Original Message-----
> > From: Petr Krenzelok [mailto:[EMAIL PROTECTED]]
> > Sent: 09 October 2001 09:23
> > To: [EMAIL PROTECTED]
> > Subject: [REBOL] Re: tcp port open?
> >
> > Maarten Koopmans wrote:
> > > Hi,
> > >
> > > Is there a way to now if a tcp port is open on both sides. So that a
> >
> > server
> >
> > > (or client) can see whether or not the other side of the pipe is still
> >
> > open?
> >
> > I am not sure. Designing our camera we looked at Ethereal
> > (http://www.ethereal.org) packet monitor, and TCP communication is several
> > stages process of various ACK, SYN, RST, PSH, FIN type packets. There is no
> > real
> > "connection" on the network, just packets sent here and there. That is why
> > someone can watch your packets (sniff) and see what you are sending, if
> > connected to the same network. So, alive connection is just some state in
> > your
> > tcp stack on your side, irrelevant to other side of "connection". There is
> > also
> > known case of semi-connection - e.g. one side timeouts, and the other side
> > is
> > still able to send packets, which are really delivered, just not probably
> > processed.
> >
> > So, theoretically, if opposite side sends you FIN or RST assigned packet,
> > you
> > should note it. This question is, however, for Holger. We have 'query
> > function
> > available, maybe Rebol somehow knows, if opposite side closed the
> > connection?
> >
> > -pekr-
> >
> > > Thanks,
> > >
> > > Maarten
> > > --
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