Re: Serial port redirection

[Jeffrey Altman <jaltman-WLbs8XpHrcb2fBVCVOL8/A@public.gmane.org>]

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Corey Minyard wrote:

> Jeffrey Altman wrote:
>
>> Its not a Kermit bug; If you pass the socket file descriptor to an 
>> external program
>> the external program must understand telnet protocol.  Otherwise, it 
>> can't send the
>> correct data format. 
>
>
> No, it *is* a kermit bug.  When kermit sends an 0xff character, it 
> needs to escape it per the standard telnet protocol.  It's obviously 
> not doing this.
>
> -Corey


I agree, the IAC must be quoted.  The problem is that when an external 
protocol handler is
executed as a child process, Kermit is suspended and the child process 
has complete control
over the socket file descriptor. 

Kermit is not sitting between the external protocol and the host. 

Some versions of sz have a command line flag to handle this situation 
such that IAC (0xff) are
not sent but are instead escaped within the zmodem protocol.

Jeffrey Altman



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