[Dnsmasq-discuss] 'shared-network' behavior would be huge

[Ryan Gray]

TLDR; How do I use "shared-network" exactly?  :)

Everything compiled and is up and running with no changes to my
existing configs or method of execution. I'm a little unclear about
how to hold this tool.

Assuming a router interface of 192.168.4.126/25 and no sub interfaces,
I typically do something like this:

dhcp-range=set:"internet-192_168_4_0_25",192.168.4.1,192.168.4.125,255.255.255.128,1h
tag-if=set:internet-pool,tag:internet-192_168_4_0_25
dhcp-option=tag:"internet-192_168_4_0_25",3,192.168.4.126
dhcp-option=tag:"internet-192_168_4_0_25",1,255.255.255.128
dhcp-option=tag:"internet-192_168_4_0_25",5,8.8.8.8

If I add another gateway IP to that router interface (I use "gateway
IP" loosely), 192.168.5.0/24 and  and assuming the router with the
ip-helper configured is, by default, going to say "hey, I'm
192.168.4.126". With ISC, having ranges for 192.168.4.1-125 and
192.168.5.1-253 within the block of config that defines a
shared-network would make things copacetic.

The question:  In this scenario, am I to start dnsmasq with
"--shared-network=192.168.4.126,192.168.5.0"    ?   If so, I'm not
sure if my subnet definition strategy above is going to stay the same
because I'm not sure how dnsmasq is going to treat this in regards to
tags.  Perhaps I'm just looking at this sideways.

On Fri, Mar 29, 2019 at 4:13 PM Simon Kelley <simon at thekelleys.org.uk> wrote:
>
> On 29/03/2019 20:36, Ryan Gray wrote:
> > Hello other humans,
> >
> > First, Simon Kelly, thank you for dnsmasq.
> >
> > I noticed here
> > http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2018q4/012700.html
> > that there was discussion of the possibility of supporting behavior like
> > ISC's 'shared-network'. Did this go anywhere? I would absolutely use
> > this and would be happy to perform any testing that would help. I didn't
> > see other mentions of this so I thought I'd ask.
> >
> > Dead serious, this would be spectacular.
> >
> >
>
>
>
> Today (actually, yesterday) is your lucky day:
>
> http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=ae5b7e04a1025167f1b80840e61432a3cea9625c
>
> Do please test!
>
>
> Simon
>
>
> > Regards,
> > Ryan Gray
> >
> >
> > _______________________________________________
> > Dnsmasq-discuss mailing list
> > Dnsmasq-discuss at lists.thekelleys.org.uk
> > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
> >
>
>
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