Have a question for the telnet gurus out there. Trying to get to the bottom of why file transfers (using any serial based protocol) don't work on my OS/2 SIO based BBS nodes via a double telnet.
The other question would be when the telnet negotiation happens, is this for both telnet sessions in the double telnet situation or just the new one connecting?
No, Telnet binary mode only affects the interpretation of the CR/LF and CR/NUL byte pairs, which most definitely are likely to be contained in many/most file transfers and thus need to have binary mode enabled to be received correctly (e.g. for chksum/crc validation purposes, if nothing else).
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