Re: [Dnsmasq-discuss] multiple dhcp-options with the same tag

[Wink Saville]

I've created a fork of dnsmasq on put it on github and in branch wink-test1
. In that
branch I added a README.md with information and how I "tested" my
hypothesis that dnsmasq does support multiple dhcp-options with the same
tag. Of course I may be full of S***, but it does seem to work and it
doesn't seem to cause any issues.

I'd be glad to make any other changes and, of course, any feedback is
welcome. Also, if I'm correct and "multiple dhcp-options with the same tag"
does work, I'd like to suggest it be documented. I can take a go at it
if you'd like.

-- Wink


On Fri, Sep 8, 2023 at 9:37 PM Wink Saville  wrote:

> I'm learning dnsmasq and I'm taking advice from ChatGPT-4, probably a
> bad idea but so far it's given reasonable advice :)
>
> Anyway, in this instance I was asking a question[1] about how to
> configure dnsmasq on OpenWRT.
>
> The first prompt was:
>
> "Using Luci on openwrt is there a way to set a dhcp-option and use it
> on a dhcp-host record?"
>
> It answered correctly that using luci you can't do it but you can do
> it in /etc/dnsmasq.conf and gave an example:
>
> ```
> dhcp-host=00:11:22:33:44:55,set:myOptions,192.168.1.100
> dhcp-option=tag:myOptions,option:dns-server,192.168.1.2
> dhcp-option=tag:myOptions,option:router,192.168.1.1
> ```
>
> My second prompt ends with the question:
>
> "Anyway, your example shows that myOptions is composed of two separate
> dhcp-option's. Are you sure that is legal, can you provide me with a
> link or a quote from the dnsmasg.conf documentation?"
>
> Its response was, as is typical. a long winded yes and it also gave me
> a quote from the documentation. Of course, I couldn't find that quote,
> which is also typical, it lies! Anyway, to cut to the chase I'm
> writing because the technique the bot showed does work, at least it
> seems to work for me on OpenWRT with dnsmasq v2.86. But, as I said I
> don't see in the documentation. Did I just miss it or should I not use
> it or maybe it should be documented?
>
> -- Wink
>
> [1]:https://chat.openai.com/share/cadee80b-4e3e-41e1-b95e-5fd62e799a9a
>
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Re: [Dnsmasq-discuss] multiple dhcp-options with the same tag

[Wink Saville]

Dnsmasq is working fine, this is not a question about how to get it working,
it is about the syntax in dnsmasq.conf.

My second post[1] provides a more complete example of the technique
I'm using, appending multiple options into one dhcp-option, in dnsmasq.conf.
And I'm just wondering if that technique is actually supported because I didn't
see it documented.

[1]:https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2023q3/017220.html

On Sat, Sep 9, 2023 at 2:18 PM Warning XY Problem  wrote:
>
> On Sat, Sep 09, 2023 at 10:08:11AM -0700, Wink Saville wrote:
> > On Sat, Sep 9, 2023 at 6:58 AM Geert Stappers  wrote:
> > > On Fri, Sep 08, 2023 at 09:37:27PM -0700, Wink Saville wrote:
> > > >   ... "options" "tag"  ... at least it seems to work for me on
> > > > OpenWRT with dnsmasq v2.86. But, as I said I don't see in the
> > > > documentation. Did I just miss it or should I not use it
> > > > or maybe it should be documented?
> > >
> > > I can't tell.  I didn't get what the options were, what the tags was.
> > } I can't tell.  I didn't get what the options were, what the tag was.
> > > Neither what did define the tag.
> > >
> > > Please describe the original problem.
> > >
> > > Also share the default Luci configuration file
> > > and the modified Luci configuration file with the assumed solution.
> > >
> > >
> > >
> > > Groeten
> > > Geert Stappers
> > >
> > > P.S. The monthly posting has
> > > | See also https://xyproblem.info/  which starts with:
> > > |   The XY problem is asking about your attempted solution rather than
> > > |   your actual problem. This leads to enormous amounts of wasted time
> > > |   and energy, both on the part of people asking for help, and on the
> > > |   part of those providing help.
> > >
> >
> > Let me just focus my question on using
> > dhcp-host and dhcp-option in dnsmasq.conf
>
> Tell what the original problem is.
>
>
> That in other words:
>
>   dnsmasq works fine.
>   dnsmasq works even fine in most corner cases.
>
>
> Right now is it not told what the corner case is.
>
>
> Groeten
> Geert Stappers
> --
> Silence is hard to parse
>
> ___
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Re: [Dnsmasq-discuss] multiple dhcp-options with the same tag

[Warning XY Problem]

On Sat, Sep 09, 2023 at 10:08:11AM -0700, Wink Saville wrote:
> On Sat, Sep 9, 2023 at 6:58 AM Geert Stappers  wrote:
> > On Fri, Sep 08, 2023 at 09:37:27PM -0700, Wink Saville wrote:
> > >   ... "options" "tag"  ... at least it seems to work for me on
> > > OpenWRT with dnsmasq v2.86. But, as I said I don't see in the
> > > documentation. Did I just miss it or should I not use it
> > > or maybe it should be documented?
> >
> > I can't tell.  I didn't get what the options were, what the tags was.
> } I can't tell.  I didn't get what the options were, what the tag was.
> > Neither what did define the tag.
> >
> > Please describe the original problem.
> >
> > Also share the default Luci configuration file
> > and the modified Luci configuration file with the assumed solution.
> >
> >
> >
> > Groeten
> > Geert Stappers
> >
> > P.S. The monthly posting has
> > | See also https://xyproblem.info/  which starts with:
> > |   The XY problem is asking about your attempted solution rather than
> > |   your actual problem. This leads to enormous amounts of wasted time
> > |   and energy, both on the part of people asking for help, and on the
> > |   part of those providing help.
> >
> 
> Let me just focus my question on using
> dhcp-host and dhcp-option in dnsmasq.conf
 
Tell what the original problem is.


That in other words:

  dnsmasq works fine.
  dnsmasq works even fine in most corner cases.


Right now is it not told what the corner case is.


Groeten
Geert Stappers
-- 
Silence is hard to parse

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Re: [Dnsmasq-discuss] multiple dhcp-options with the same tag

[William Edwards via Dnsmasq-discuss]

> Op 9 sep. 2023 om 07:19 heeft Wink Saville  het volgende 
> geschreven:
> 
> I'm learning dnsmasq and I'm taking advice from ChatGPT-4, probably a
> bad idea but so far it's given reasonable advice :)

How are you able to judge if advice is reasonable if you’re needing to ask for 
advice?

> 
> Anyway, in this instance I was asking a question[1] about how to
> configure dnsmasq on OpenWRT.
> 
> The first prompt was:
> 
> "Using Luci on openwrt is there a way to set a dhcp-option and use it
> on a dhcp-host record?"
> 
> It answered correctly that using luci you can't do it but you can do
> it in /etc/dnsmasq.conf and gave an example:
> 
> ```
> dhcp-host=00:11:22:33:44:55,set:myOptions,192.168.1.100
> dhcp-option=tag:myOptions,option:dns-server,192.168.1.2
> dhcp-option=tag:myOptions,option:router,192.168.1.1
> ```
> 
> My second prompt ends with the question:
> 
> "Anyway, your example shows that myOptions is composed of two separate
> dhcp-option's. Are you sure that is legal, can you provide me with a
> link or a quote from the dnsmasg.conf documentation?"
> 
> Its response was, as is typical. a long winded yes and it also gave me
> a quote from the documentation. Of course, I couldn't find that quote,
> which is also typical, it lies! Anyway, to cut to the chase I'm
> writing because the technique the bot showed does work, at least it
> seems to work for me on OpenWRT with dnsmasq v2.86. But, as I said I
> don't see in the documentation. Did I just miss it or should I not use
> it or maybe it should be documented?
> 
> -- Wink
> 
> [1]:https://chat.openai.com/share/cadee80b-4e3e-41e1-b95e-5fd62e799a9a
> 
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> 


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Re: [Dnsmasq-discuss] multiple dhcp-options with the same tag documentation

[Wink Saville]

OpenWRT is weird and has its own technique for the initial
configuration of dnsmasq[1]. Let me just focus my question on using
dhcp-host and dhcp-option in dnsmasq.conf

My understanding is a "typical" way to use dhcp-option is to define
two separate options and "set" them twice in a dhcp-host

# Define dhcp-option with tag:router1 and option:router
dhcp-option=tag:router1,option:router,192.168.2.1

# Define another dhcp-option with tag:dns_server1 and option:dns-server
dhcp-option=tag:dns_server1,option:dns-server,1.1.1.1

# Now specify multiple dhcp-option using their tag names in dhcp-host
dhcp-host=00:05:1b:b0:6f:f0,set:dns_server1,set:router1

The bot suggested multiple options could be appended to a
a single dhcp-option using one tag name:

# Define dhcp-option with tag:my_options with option:router
dhcp-option=tag:my_options,option:router,192.168.2.2

# Now "append" option:dns-server to dhcp-option with tag:my_options
dhcp-option=tag:my_options,option:dns-server,1.1.1.1

# Append more options to option with tag:my_options ...

# Now use my_options to give a dhcp-host multiple options
dhcp-host=00:05:1b:b0:6f:f0,set:my_options

Using the "append" technique means I don't have to repeat myself and
I can use one "my_options" to supply multiple options to any number
of different dhcp-host's. I've determined this works, but is it "legal"? I
ask because I could not find documentation for the "append" technique.


[1]:https://openwrt.org/docs/guide-user/base-system/dhcp

On Sat, Sep 9, 2023 at 6:58 AM Geert Stappers  wrote:
>
> On Fri, Sep 08, 2023 at 09:37:27PM -0700, Wink Saville wrote:
> >   ... "options" "tag"  ... at least it seems to work for me on
> > OpenWRT with dnsmasq v2.86. But, as I said I don't see in the
> > documentation. Did I just miss it or should I not use it
> > or maybe it should be documented?
>
> I can't tell.  I didn't get what the options were, what the tags was.
> Neither what did define the tag.
>
> Please describe the original problem.
>
> Also share the default Luci configuration file
> and the modified Luci configuration file with the assumed solution.
>
>
>
> Groeten
> Geert Stappers
>
> P.S. The monthly posting has
> | See also https://xyproblem.info/  which starts with:
> |   The XY problem is asking about your attempted solution rather than
> |   your actual problem. This leads to enormous amounts of wasted time
> |   and energy, both on the part of people asking for help, and on the
> |   part of those providing help.
>
> --
> Silence is hard to parse
>
> ___
> Dnsmasq-discuss mailing list
> Dnsmasq-discuss@lists.thekelleys.org.uk
> https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss

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Re: [Dnsmasq-discuss] multiple dhcp-options with the same tag documentation

[Geert Stappers]

On Fri, Sep 08, 2023 at 09:37:27PM -0700, Wink Saville wrote:
>   ... "options" "tag"  ... at least it seems to work for me on
> OpenWRT with dnsmasq v2.86. But, as I said I don't see in the
> documentation. Did I just miss it or should I not use it
> or maybe it should be documented?

I can't tell.  I didn't get what the options were, what the tags was.
Neither what did define the tag.

Please describe the original problem.

Also share the default Luci configuration file
and the modified Luci configuration file with the assumed solution.



Groeten
Geert Stappers

P.S. The monthly posting has
| See also https://xyproblem.info/  which starts with:
|   The XY problem is asking about your attempted solution rather than
|   your actual problem. This leads to enormous amounts of wasted time
|   and energy, both on the part of people asking for help, and on the
|   part of those providing help.

-- 
Silence is hard to parse

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[Dnsmasq-discuss] multiple dhcp-options with the same tag

[Wink Saville]

I'm learning dnsmasq and I'm taking advice from ChatGPT-4, probably a
bad idea but so far it's given reasonable advice :)

Anyway, in this instance I was asking a question[1] about how to
configure dnsmasq on OpenWRT.

The first prompt was:

"Using Luci on openwrt is there a way to set a dhcp-option and use it
on a dhcp-host record?"

It answered correctly that using luci you can't do it but you can do
it in /etc/dnsmasq.conf and gave an example:

```
dhcp-host=00:11:22:33:44:55,set:myOptions,192.168.1.100
dhcp-option=tag:myOptions,option:dns-server,192.168.1.2
dhcp-option=tag:myOptions,option:router,192.168.1.1
```

My second prompt ends with the question:

"Anyway, your example shows that myOptions is composed of two separate
dhcp-option's. Are you sure that is legal, can you provide me with a
link or a quote from the dnsmasg.conf documentation?"

Its response was, as is typical. a long winded yes and it also gave me
a quote from the documentation. Of course, I couldn't find that quote,
which is also typical, it lies! Anyway, to cut to the chase I'm
writing because the technique the bot showed does work, at least it
seems to work for me on OpenWRT with dnsmasq v2.86. But, as I said I
don't see in the documentation. Did I just miss it or should I not use
it or maybe it should be documented?

-- Wink

[1]:https://chat.openai.com/share/cadee80b-4e3e-41e1-b95e-5fd62e799a9a

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