Re: Zmodem and Net::Telnet

Wow, zmodem! Are you sure you don't actually want ymodem-g? Back when I was file-trading on my 9600 bps modem, ymodem-g was considerably faster than zmodem. The chief advantage of zmodem, fast error-correction, doesn't apply to TCP connections like telnet which are error-free already. Some versions of ymodem even let you chat with the sysop during file-transfers!

Ahem, where was I? Ah yes, we're in the year 2006! What the heck are you using zmodem over telnet for?

Here's a few alternatives to consider:

FTP
SCP
rsync
Sending the file base64 encoded over the telnet link. You can decode it on the other end using Perl or a stand-alone base64 decoder. This is how stuff like Emacs' tramp-mode works for example.

Any of these will probably be easier to implement than trying to jury-rig zmodem to transfer files via Net::Telnet.

-sam

Comment on Re: Zmodem and Net::Telnet

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Re^2: Zmodem and Net::Telnet by splinky (Hermit) on Feb 01, 2006 at 19:56 UTC
I thought it was clear from my question, but perhaps not -- I'm not writing code for the thing at the other end of the connection. It's a piece of equipment whose only interface is a serial port, and the only protocol it uses for file transfer is zmodem. The fact that it's on a terminal server is a convenience -- keeps us from having to physically hook a PC up to it whenever we want to do something with it. Unless I'm missing something, that pretty much locks me into zmodem over telnet, no matter how retarded it sounds.	[reply]

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Re^2: Zmodem and Net::Telnet
by splinky (Hermit) on Feb 01, 2006 at 19:56 UTC

Unless I'm missing something, that pretty much locks me into zmodem over telnet, no matter how retarded it sounds.

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