[BSD] telnet kliens

[Gabor HALASZ]

On 2/21/2013 2:08 PM, gabor at zahemszky.hu wrote:
>> A bold attributum mukodik, de a do supress local echo nem (pedig az
>> interneten is ezt a szekvenciat irjak). Valami otlet, regi emlek
>> valaki fejeben?
>
> Most nem tudok keresni, de emlekeim szerint a szekvenciát egy
> pontosvesszűvel le is kell zárni.

Sajnos nem. Ilyen lesz tole:

Login: asd
Password: ;asdasd

Szoval erti, hogy akarok tole valamit, de azt nem, hogy mit :) (a 
peldakban sem latok extra vezerlokaraktert, csak a 255, 253, 45 
sorozatot. Az rfc854 is azt mondja:

    All TELNET commands consist of at least a two byte sequence:  the
    "Interpret as Command" (IAC) escape character followed by the code
    for the command.  The commands dealing with option negotiation are
    three byte sequences, the third byte being the code for the option
    referenced.  This format was chosen so that as more comprehensive use
    of the "data space" is made -- by negotiations from the basic NVT, of
    course -- collisions of data bytes with reserved command values will
    be minimized, all such collisions requiring the inconvenience, and
    inefficiency, of "escaping" the data bytes into the stream.
)