src/rfc2131.c has all the relevant code: add code to handle
DHCPLEASEQUERY to the switch in dhcp_repy();
HOWEVER. Whilst the RFC sort of makes this sound like a general query
system, it's actually a hack to solve a specific problem that access
concentrators don't have persistent storage, so this allows them to rely
on the DHCP server to persistently store Relay Agent Information
If the Relay Agent Information (option 82) is specified in the
Parameter Request List, then the information contained in the most
recent Relay Agent Information option received from the relay agent
associated with this IP address MUST be included in the
DHCPLEASEACTIVE message.
This is the biggest problem, since dnsmasq doesn't store that
information in its lease database either. Adding that info is a large
undertaking, with compatibility risks.
The quote above make it clear that, even if you application doesn't need
option 82 information, an RFC-compliant implementation of LEASEQUERY
does, and it's not a small job.
Simon.
On 24/02/2023 19:10, Rashi Krishna wrote:
Thanks for the update. If I want to add the code myself, do you have any
pointers to where to get started from?
Thanks again,
Rashi
On Fri, 24 Feb, 2023, 16:23 Nicolas Cavallari,
<nicolas.cavall...@green-communications.fr
<mailto:nicolas.cavall...@green-communications.fr>> wrote:
On 24/02/2023 10:13, Rashi Krishna wrote:
> Hi all.
>
> I just wanted to know if leasequery is supported in Dnsmasq. I tried
> sending a leasequery to the server, but I couldn't get any response.
There does not seem to be any leasequery (RFC 4388) support in dnsmasq.
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