dhcpcd-discuss

Hi Thomas

On 27/06/2018 11:45, HAMMERMÜLLER Thomas wrote:
> I´m using dhcpcd on the Raspberry Pi and it works pretty good.
>
> Now I would like to send some information from the client to a DHCP 
> server via the DHCP options. For this, I use option 60, vendor class id, 
> and option 43, vendor specific information. If I configure both options 
> in the dhcpcd.conf it works also pretty good.
>
> Now my question is, if it is possible to customize both options in the 
> run hook e.g. PREINIT?
>
> Background is that the content of both options should depend on some 
> hardware switches on the device. I would need this to be able to 
> distinguish between the devices at the DHCP server.

No, this is currently not possible.
Provided the hardware switches don't change during runtime you would be 
best placed to generate dhcpcd.conf using something like sed or awk to 
create one from a template and fill in the values before starting dhcpcd.

Now, if the switches do change during runtime, you could hook this into 
an acpi event maybe (if the platform supports it) to regen dhcpcd.conf. 
You could then call `dhcpcd -n` to force dhcpcd to reload config and 
rebind addresses.

Roy