[Dnsmasq-discuss] DHCPv6 wishes (Re: IPv6: selective RAs)

[Simon Kelley]

On 13/09/12 10:29, Lutz Preßler wrote:
> Hello,
> Am Mittwoch, 12. September 2012 schrieb Lutz Preßler:
>> Am Mittwoch, 12. September 2012 schrieb Simon Kelley:
>>> On 12/09/12 14:20, Lutz Preßler wrote:
>>>
>>> You can black or white list for DHCPv6 with the --dhcp-ignore (but it
>>> might be difficult to blacklist for DHCpv6 and allow DHCPv4 - that could
>>> be fixed.)
>> Ok, I'll try.
> Whitelisting with DUID does work as documented, e.g.
>   dhcp-host=id:00:01:00:01:16:97:D9:B5:00:0A:29:5E:8C:D0
>   dhcp-ignore=tag:!known
> (probably also with explicit tags).
> 
> Two things would be helpful:
> - A way to tag depending on link local IPv6 source address (and interface?)
>   of the request. This is in many cases easier to get in advance than the
>   DUID used (and in the original application also needed to selectively
>   ignore RA solicitations). (I know that this is not usable with relays.)
> 

Interface is already there: at tag with the name of the arrival
interface is set on all DHCP transactions. I'll look at the source
address, also setting a "dhcpv6" tag so that it's possible to ignore
hosts for DHCPv6 but not DHCPv4 (or vice versa)

> - Logging: with log-dhcp ignored DHCPSOLICITs are logged (including DUID)
>   but DHCPINFORMATION-REQUESTs are not. Probably this is not intentionally?
>   (Maybe also include requesting LL IPv6 address in logging.)

Need to look at that.


Cheers,

Simon.

> 
> Lutz
>