Re: Re: syncterm
  By: Michiel Broek to R.J. Clay on Tue Mar 21 2006 10:09 pm

 > Hi Jame,
 > 
 > R.J. Clay wrote to Michiel Broek:
 > RJC> On Mon, 20 Mar 2006 17:27:15 -0500, Michiel Broek wrote:
 > RJC>
 > RJC> > I got some things figured out. Your bbs puts the telnet
connection in
 > RJC> > binary mode.
 > RJC> > My bbs runs from inetd and doesn't put the telnet connection into
 > RJC> > binary mode.
 > RJC>
 > RJC>      But it can, can it not?  At least, according to the man page for
 > RJC> in.telnetd on my system (Debian Sarge), it can when it receives the
 > RJC> proper telnet options...  ("WILL BINARY", I think
it is from the
 > client...
 > 
 > RJC> "DO BINARY" is what in.telnetd sends...)
 > 
 > Yes it does. Terminal programs that send the will and do binary have to
 > problems with downloads. Syncterm doesn't do that and depends on the server
 > side. But in.telnetd will not do that on it's own, it only sets binary mode
 > if the clients asks for it.
 > 
 > 
 > RJC> > I tried to put the connection into binary mode but that
doesn't work
 > RJC> > because in.telnetd sits between mbsebbs and the internet.
 > RJC>
 > RJC>     That would be up to in.telnetd, wouldn't it?   Need to figure a way
 > to
 > 
 > RJC> capture debug info on the session start up...   I only did some simple
 > RJC> testing;  I can't tell for sure if, for instance, the telnet session
 > RJC> is accepting the "-8" option I used when I telneted
that way to the
 > system
 > 
 > RJC> where mbse is...   (does look like the ssl session was accepted
 > though...)
 > 
 > 
 > On my system (Slackware) there is no option to force telnetd into 8 bit
 > binary mode.
 > 
 > With telnet mailer sessions mbcico is started directly from inetd. With
 > human telnet on port 23, in.telnetd handles the connection and starts a
 > login process, and that will finally start mbsebbs.
 > 
 > So I depend on the client terminal to put the connection into binary mode.
 > It's not perfect I know, but from the linux clients syncterm is the first
 > one I see that doesn't set it.
 > 
 > Short term solution is to change syncterm. At least I want to try that just
 > to be sure that it can work.
 > For the longer solution mbse needs it's own telnetd for login, but that can
 > then be made also to handle incoming mailer sessions on port 23 like some
 > other systems can do.

That change to SyncTerm has been made. Did you get my last message on this
topic?

 > I also found that it doesn't harm that both the server and the client put
 > the connection into binary mode.

That's correct. And for clarification a Telnet connection can have binary mode
enabled in either (or both) directions.

                                                  digital man

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