Re: SFTP SSH_FXP_REALPATH packet question

[Joseph Galbraith <galb-list%vandyke.com@localhost>]

Nickolay L. wrote:
> Hello,
>
>   In draft-ietf-secsh-filexfer-10.txt said, that packet has the
>   following format :
>
>   byte   SSH_FXP_REALPATH
>   uint32 request-id
>   string original-path [UTF-8]
>   byte   control-byte [optional]
>   string compose-path[0..n] [optional]
>
>   So the question is : how do I logicaly-correct recognize, is the
>   control-byte present, or absent? The way is to see the first byte
>   after other fields, if it zero (It seems that compose-path will not
>   be bigger than 2^24), the control-byte is absent. But this way not
>   looks like the best..

Sorry that it isn't clear.  control-byte is _not_ optional
if compose-path is specified.

In other words, it is permissible to omit:

a.) both control-byte & compose-path
b.) compose-path only

It is not permissible to omit the control-byte if the compose-path
is present.

>   And another question, are there any available implementations of
>   clients/server which supports versions 5 or/and 6 of SFTP protocol?

The WinSCP client supports v5.

VanDykes VShell server supports v5.

I don't know of any v6 implementations yet, though I know both
VanDyke's VShell and WinSCP do support some of the extensions
from v6.

Thanks,

Joseph