[Dnsmasq-discuss] srv-host and domain

[Geert Stappers]

On Wed, Sep 15, 2021 at 02:29:57AM +0300, Otto Modinos wrote:
> On Tue, Sep 14, 2021 at 09:50:54PM +0200, Geert Stappers via Dnsmasq-discuss wrote:
> > On Tue, Sep 14, 2021 at 07:51:02PM +0300, Otto Modinos wrote:
> > > On Tue, Sep 14, 2021 at 02:02:59PM +0000, Donald Muller wrote:
> > > > > 
> > > > > Something like this:
> > > > > 
> > > > >    domain=mydomain.home,192.168.1.0/24,local
> > > > >    srv-host=_xmpp-client._tcp,myhost.mydomain.home,5222,0,5
> > > > > 
> > > > > This should work I believe.  Yet, a SRV query for
> > > > > _xmpp-client._tcp.mydomain.home gets no answer.
> > > > > 
> > > > > I also tried srv-host=_xmpp-client._tcp.,myhost.mydomain.home, notice
> > > > > the ending dot on the service (just like the manual also has) and that's
> > > > > exactly the same.
> > > > > 
> > > > 
> > > > Try querying xmpp-client._tcp.mydomain.home
> > > > 
> > > 
> > > No result.
> > 
> > 
> > Please elaborate
> > 
> > 
> > Provide the output the dig command that is used
> > and what dnsmasq logs with  --log-queries=extra
> > 
> Running the following command,
> 
>   dig _xmpp-client._tcp.mydomain.home SRV
> 
> dig responds with
> 
>   ;; global options: +cmd
>   ;; Got answer:
>   ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 51244
>   ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
> 
>   ;; OPT PSEUDOSECTION:
>   ; EDNS: version: 0, flags:; udp: 4096
>   ;; QUESTION SECTION:
>   ;_xmpp-client._tcp.mydomain.home.	IN	SRV
> 
>   ;; Query time: 3 msec
>   ;; SERVER: 192.168.1.2#53(192.168.1.2)
>   ;; WHEN: Wed Sep 15 02:23:59 EEST 2021
>   ;; MSG SIZE  rcvd: 59
> 
> and dnsmasq logs
> 
>   405 192.168.1.3/35721 query[SRV] _xmpp-client._tcp.mydomain.home from 192.168.1.3
>   405 192.168.1.3/35721 config _xmpp-client._tcp.mydomain.home is NXDOMAIN
> 
> The results are exactly the same without the leading underscore.
> 

Acknowledge.

I don't know why there is not the desired behaviour from dnsmasq.


Consider to run extra tests and share the result with the ML.

Tests I have in mind:

1:

* Remove / comment out   all  srv-host entrys
* Restart dnsmasq
* Check startup messages e.g.

|sep 15 07:36:07 paddy dnsmasq-dhcp[1591277]: DHCP, IP range 192.168.45.150 -- 192.168.45.250, lease time 12h
|sep 15 07:36:07 paddy dnsmasq[1591277]: reading /etc/resolv.conf
|sep 15 07:36:07 paddy dnsmasq[1591277]: using nameserver 172.24.0.10#53
|sep 15 07:36:07 paddy dnsmasq[1591277]: read /etc/hosts - 24 addresses
|sep 15 07:36:07 paddy systemd[1]: Started dnsmasq - A lightweight DHCP and caching DNS server.


2:

* Have srv-host entries
* Restart dnsmasq
* Check startup messages
* Look for reports on  SRV host


Groeten
Geert Stappers

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