[Dnsmasq-discuss] [PATCH] wip: Add tag: usage in dhcp-option

[Geert Stappers]

On Wed, Sep 20, 2023 at 09:14:13PM -0700, Wink Saville wrote:
> If accepted there should be an example of multiple dhcp-options using
> the same tag added to dnsmasq.conf.example.
> ---
>  man/dnsmasq.8 | 29 ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)
> 
> diff --git a/man/dnsmasq.8 b/man/dnsmasq.8
> index 30429df..5f5ac83 100644
> --- a/man/dnsmasq.8
> +++ b/man/dnsmasq.8
> @@ -1317,6 +1317,34 @@ or
>  The special address 0.0.0.0 is taken to mean "the address of the
>  machine running dnsmasq".
>  
> +When a dhcp-option has a tag,
> +.B --dhcp-option=tag:common_option,option:router,192.168.2.1,
> +then that option maybe used via a
> +.B set:<tag>,
> +eg.
> +.B --dhcp-host=00:20:e0:3b:13:af,set:common_option
> +indicates that a particular host,
> +.B 00:20:e0:3b:13:af,
> +will be given
> +.B 192.168.2.1
> +as its router. This allows the same option to be used for different hosts
> +and allows changes to be made in one place. So another host could be given
> +the same tag and get the same router,
> +.B --dhcp-host=01:29:03:3b:dc:ab,set:common_option.
> +
> +It is also possible for multiple dhcp-option's to have the same tag.
> +For example:
> +.B --dhcp-option=tag:router_dns_server,option:dns-server,1.1.1.1
> +and
> +.B --dhcp-option=tag:router_dns_server,option:router,192.168.1.1.
> +Now when
> +.B set:router_dns_server
> +s used in
> +.B --dhcp-host=09:23:ab:11:29,set:router_dns_server
> +the host will receive both dhcp-options. As before other hosts can use
> +.B set:router_dns_server
> +which minimizes repetition.
> +
>  An option without data is valid, and includes just the option without data.
>  (There is only one option with a zero length data field currently defined for DHCPv4, 80:rapid commit, so this feature is not very useful in practice). Options for which dnsmasq normally
>  provides default values can be ommitted by defining the option with no data. These are


The work in progress patch has been seen.  At least by me.

I think I have seen simular content in the existing man page.


I hope the next version integrates with what is already there.



Groeten
Geert Stappers
-- 
Silence is hard to parse