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Article View: borland.public.cppbuilder.internet.socket
Article #3988

Re: bcb ServerSocket

#3988
From: Joel Guerra
Date: Wed, 20 Apr 2005 19:00
43 lines
2881 bytes
I understand, so I have built in a timer to ping-pong back and forth, if I
am missing a pong from the client, I assume the client has disconnected for
some reason, and want to clobber the connection, so that the next time the
client connects, he connects to connection[0] instead of [1]...

Thanks,

Joel



"Remy Lebeau (TeamB)" <no.spam@no.spam.com> wrote in message
news:4266a2c5@newsgroups.borland.com...
>
> "Joel Guerra" <j.nospamguerra@texasscenic.com> wrote in message
> news:42665b58@newsgroups.borland.com...
>
> > Thanks, this works most of the time, but I still have a
> > problems every now and again if I pull the enet cable out.
>
> Under most versions of Windows, the socket stack cannot detect that to
begin
> with, so sockets have no way of knowing that they are actually gone.  This
> is actually by design.  Temporary outages on a LAN/WAN are common.  Socket
> stacks are designed to handle that situation internally by keeping sockets
> "alive" for an period of time.  If the network comes back in a timely
> fashion, the socket stack can reestablish communication with the remote
> machine silently and gracefully, and the application will never know that
> the connection was ever down.  If the network does not come back, or if
the
> remote machine cannot be reached anymore, then the stack still has no way
of
> knowing that the socket connection is really gone until the socket times
out
> internally.  Only then can the socket be invalidated by the socket stack.
> Until that happens, the socket stack does not report any errors on the
> socket, so the application has no way of knowing what.is happening.
>
>
> Gambit
>
>
>
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Subject: Re: bcb ServerSocket
Date: Wed, 20 Apr 2005 14:00:24 -0500
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