Re: [9fans] snoopy thinks that the cpu command talks 9p

["Russ Cox" <rsc@swtch.com>]

> Trying to understand how authentication works, I ended up using
> snoopy on a cpu connection, something like:
>
>     % snoopy -f 'tcp(sd=17010)'
>
> and, on another window:
>
>     % cpu
>
>
> This will give you lots of lines that looks like:
>
>     ninep(68656c6c6f203966616e7321)

Cpu *does* talk 9P, but it is usually encrypted 9P, and the
chance of 9P encrypting to an ASCII string is pretty low.

If you ran cpu -e none (not an option unless you compile
your own special copy of cpu) you would be able to see
the raw 9P traffic.

> I believe it should say something like:
>
>    unknown(68656c6c6f203966616e7321)
>
> or
>
>    unknown"helo 9fans"

There's not really any good option here, since the interesting
bits are encrypted, and saying ninep is not a lie, so I'm
inclined just to leave it alone.  There's certainly no point in
printing unknown("hello 9fans!"), since as I mentioned above,
it's either 9P or encrypted 9P, never plain text.

Russ