Re: [uml-devel] [uml-user] ppp and UML -possible? why or why not?

Re: [uml-devel] [uml-user] ppp and UML -possible? why or why not?

[Jeff Dike]

On Thu, Jun 14, 2007 at 11:08:16AM -0700, Mark wrote:
> My question is I've looked around, but don't understand why (page
> 54) says that UML doesn't support PPP. Is pppd the problem and can I
> just use something like slirp?   (I did find a debian package with UML
> and slirp).

You're looking for a mechanism to exchange packets with the host, not
asking about ppp support within UML?

ppp isn't supported because no one ever wrote it.  Slirp is basically
the last choice for when nothing else will work, and ppp might be
right down there with it.  TUN/TAP is the mechanism of choice.

				Jeff

-- 
Work email - jdike at linux dot intel dot com

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Re: [uml-devel] [uml-user] ppp and UML -possible? why or why not?

[Daniel Gryniewicz]

On Thu, 2007-06-14 at 17:58 -0400, Jeff Dike wrote:
> On Thu, Jun 14, 2007 at 11:08:16AM -0700, Mark wrote:
> > My question is I've looked around, but don't understand why (page
> > 54) says that UML doesn't support PPP. Is pppd the problem and can I
> > just use something like slirp?   (I did find a debian package with UML
> > and slirp).
> 
> You're looking for a mechanism to exchange packets with the host, not
> asking about ppp support within UML?
> 
> ppp isn't supported because no one ever wrote it.  Slirp is basically
> the last choice for when nothing else will work, and ppp might be
> right down there with it.  TUN/TAP is the mechanism of choice.
> 
> 				Jeff
> 

I actually started writing ppp support at one point, so that we could
test using point-to-point connections between UMLs, but the project got
canceled before I got anywhere.

Daniel


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Re: [uml-devel] [uml-user] ppp and UML -possible? why or why not?

[Mark Lidd]

[-- Attachment #1.1: Type: text/plain, Size: 1253 bytes --]

I want the UML to send data out the host's serial port so the UML 
process can setup a ppp session to something connected to the hosts 
serial port. --not talk to the host.

I know I can run pppd on the host and give the UML a network connect 
to it, but I don't want to do the connect that way.  I want as much 
of the processing as possible to be in a jailed UML.

I gather that I can give the UML the /dev/ttyS0 connection to the 
serial port and have the UML pppd connect to ss1, etc.

Thanks,
Mark

Thanks.  At 05:58 PM 6/14/2007, Jeff Dike wrote:
>On Thu, Jun 14, 2007 at 11:08:16AM -0700, Mark wrote:
> > My question is I've looked around, but don't understand why (page
> > 54) says that UML doesn't support PPP. Is pppd the problem and can I
> > just use something like slirp?   (I did find a debian package with UML
> > and slirp).
>
>You're looking for a mechanism to exchange packets with the host, not
>asking about ppp support within UML?
>
>ppp isn't supported because no one ever wrote it.  Slirp is basically
>the last choice for when nothing else will work, and ppp might be
>right down there with it.  TUN/TAP is the mechanism of choice.
>
>                                 Jeff
>
>--
>Work email - jdike at linux dot intel dot com



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Re: [uml-devel] [uml-user] ppp and UML -possible? why or why not?

[Blaisorblade]

On venerdì 15 giugno 2007, Mark Lidd wrote:
> I want the UML to send data out the host's serial port so the UML
> process can setup a ppp session to something connected to the hosts
> serial port. --not talk to the host.
>
> I know I can run pppd on the host and give the UML a network connect
> to it, but I don't want to do the connect that way.  I want as much
> of the processing as possible to be in a jailed UML.
>
> I gather that I can give the UML the /dev/ttyS0 connection to the
> serial port and have the UML pppd connect to ss1, etc.
>
> Thanks,
> Mark

You can test if it works, but I believe that UML serial driver does not 
implement many of the ioctl's needed for a proper serial port, so it's 
difficult it will work.

Bye
-- 
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade

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