Re: [Netconf] SSH question

[Andy Bierman <andy at netconfcentral.com>]

Juergen Schoenwaelder wrote:
> On Thu, Jun 18, 2009 at 07:36:34PM +0200, Andy Bierman wrote:
>  
> > You know about openssh, and the ClientAliveInterval messages
> > that it sends (keepalive at openssh.com)?  The client is
> > supposed to send data on the channel before N of these
> > arrive.
> >
> > It seems that libssh2 drops these messages.
> > But if the NETCONF manager wanted to answer,
> > what can it send to the agent?  whitespace?
> > an XML comment?
> >
> > Is the agent supposed to handle (discard) non-PDU messages
> > received on its channel? What is the most interoperable
> > way to send data to the agent without actually issuing
> > an <rpc> and wasting resources?
>
> I think you are confusing protocol layers. The keepalive at openssh.com
> messages are sent as part of the SSH Connection Protocol (see RFC
> 4254) and they should trigger an SSH Connection Protocol reply. They
> should never show up in the data stream carried over an SSH channel.
> If they do, then the SSH implementation needs to be fixed.

thanks.
you are right -- these are CHANNEL_REQUEST messages,
not CHANNEL_DATA messages. Not sure what libssh2 is
answering with, but it isn't working (yet).


> /js

Andy