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000487_news@columbia.edu_Mon Dec 19 22:58:21 1994.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: send-init packet
Date: 19 Dec 1994 22:58:21 GMT
Organization: Columbia University
Lines: 18
Message-Id: <3d536d$hs6@apakabar.cc.columbia.edu>
References: <DCbykuqcZtZH075yn@primenet.com>
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Apparently-To: kermit.misc@watsun.cc.columbia.edu
In article <DCbykuqcZtZH075yn@primenet.com>,
Jeff Bishop <jbishop@primenet.com> wrote:
>How does kermit no that the send-init packet is coming and what special
>sequence starts it. I am wanting to use this string to stick in a term
>program to call kerlite for automatic downloads. This allows me to not have
>to rely on t he other end sending apc commands to my machine.
>
If you look at the Kermit protocol specification, you can see that
the initial Kermit packet can contain almost any sequence of characters.
There is no way a terminal emulator can be expected to recognize a Kermit
packet. You could say that Kermit packets start with Ctrl-A, but (a) they
do not necessarily start with Ctrl-A, and (b) Ctrl-A (or any other control
character) might be meaningful to the terminal emulator. The only reliable
way to get a terminal emulator to switch into file transfer mode is to send
it an escape sequence that is meaningful to it, which is exactly what APC
is for.
- Frank