Re: Remotely choose a menu entry

[Andrei Borzenkov]

On Mon, Dec 1, 2014 at 1:43 PM,  <address@hidden> wrote:
>
> If you wanted system to boot with wol package then it should get kernel and 
> initrd from somewhere.
> What is your final goal? How you will get all required binaries ?
>

Are you asking me? I'm not a topic starter.

> Regards
> Parmeshwr
>
> -----Original Message-----
> From: Andrei Borzenkov [mailto:address@hidden
> Sent: Monday, December 01, 2014 4:08 PM
> To: Prasad, Parmeshwr
> Cc: The development of GNU GRUB
> Subject: Re: Remotely choose a menu entry
>
> On Mon, Dec 1, 2014 at 11:19 AM,  <address@hidden> wrote:
>> Is your idea is to send kernel+grub+initramfs through magic packet ?
>
> No.
>
>>
>> if yes then lot of wol design should change first.
>>
>>
>>
>> Regards
>>
>> Parmeshwr
>>
>>
>>
>> From: address@hidden
>> [mailto:address@hidden On
>> Behalf Of Brugnara Daniele
>> Sent: Saturday, November 29, 2014 9:47 PM
>> To: Andrei Borzenkov; Brugnara Daniele
>> Cc: address@hidden
>> Subject: Re: Remotely choose a menu entry
>>
>>
>>
>> I am thinking about a secret key known from both sender and receiver
>> and encode/decode the packet using this, a strong algorithm, of course.
>>
>> Il giorno Sab 29 Nov 2014 17:03 Andrei Borzenkov <address@hidden>
>> ha
>> scritto:
>>
>> В Sat, 29 Nov 2014 01:10:28 +0000
>> Brugnara Daniele <address@hidden> пишет:
>>
>>> Hi all.
>>>
>>> I'm thinking about a system that boots with a wol packet. Who sends
>>> this packet in 99% of cases, is far away from that computer and it
>>> could be useful to boot into a different system instead of the
>>> default one. (please keep in mind that changing the default option in
>>> grub is not a option for this specific use case)
>>>
>>> If a wol can be delivered successfully, an UDP packet containing
>>> simple datas should be enough to achieve this.
>>>
>>> Something like this:
>>>
>>> - MAC: the destination device mac address
>>> - choice: a number (can be empty)
>>> - commandLine: a full commandline (a choice or this..)
>>> - more? I don't know for now..
>>>
>>> This option should be enabled in the grub.conf by the user.
>>>
>>> What do you think about? Could this be useful? Am I missing
>>> something, like a tool that does this automagically?
>>>
>>
>> Yes, it could probably be implemented as a command that loops listening
>> for magic packet and then sets default menu option. Of course, you
>> would need to consider security aspects (who is allowed to send
>> packet, how it is authenticated etc).
>>
>>> I've read about an eth-to-serial but it's not what I want.
>>> PXE or bootp is not an option here. I don't want to manage another
>>> server...
>>>
>>> Thanks for your time.
>>>
>>> Daniele.