Re: SCP under SSH2

["Claudio Robles" <crobles7%comcast.net@localhost>]

Thanks a lot for all the answers, specially Sara.

 I do see that SCP could be used and take part of the market, since SFTP is 
a little big and continue growing.  Anybody knows of SFTP implementation 
(client or server) newer than version 4?

 I will take a look at OpenSSH to understand the details, in particular the 
time (second from when), modes(octal), and basename.

Thanks again.

Claudio Robles

----- Original Message ----- 
From: "Sara Golemon" <ietf-secsh%libssh2.org@localhost>
To: "Claudio Robles" <crobles7%comcast.net@localhost>
Sent: Monday, September 12, 2005 12:24 AM
Subject: Re: SCP under SSH2


> >  It is possible to use SCP under SSH2? and if this is the case, where can 
> > I
> > find the SCP protocol?  I understand that the protocol is in fact, RCP
> > protocol, but also I have not being able to find it....
> SCP is done over a "session"/"exec" channel (with the assumption that
> the "scp" command will be in the remote path.  Check OpenSSH's source
> for the specific conversation language.
>
> Generally for receiving files it's:
> exec: "scp -pf /path/to/file"
> C: \0    (Literally, send a null byte)
> S: T 99999 99999 99999 999999   (mtime.sec mtime.usec atime.sec 
> atime.usec)
> C: \0
> S: C 0999 99999999 SSSSS  (mode[octal] filelen basename)
> C: \0
> S: XXXXXXXXXXXXXXX   (File Data, <filelen> bytes)
>
> Sending is the same conversation with roles reversed
> exec: "scp -pt /path/to/file"
> S: \0    (Literally, send a null byte)
> C: T 99999 99999 99999 999999   (mtime.sec mtime.usec atime.sec 
> atime.usec)
> S: \0
> C: C 0999 99999999 SSSSSS  (mode[octal] filelen basename)
> S: \0
> C: XXXXXXXXXXXXXXX   (File Data, <filelen> bytes)
>
> In both cases, if the 'p' is ommitted from the options then
> mtime/atime is not sent.