avahi not registering services with port number "0". added patch.

Günther Deschner gd at samba.org
Tue Apr 16 14:56:39 UTC 2019

Hi Rouven,

hm, the attached patch had 0 bytes. Can you re-send the patch ?


On 02/04/2019 13:54, Rouven WEILER via samba-technical wrote:
> In avahi.c there are two mdns services registered under port number "0" for propagation. The two services for the fuit:model named "_device-info" and "_adisk" are not propagated properly under.
> Digging on MacOS shows that "_adisk" uses e.g. port number 9 in the TimeCapsule. "_device-info" is not a service at all due to IANA. It is just a TXT entry. The mDNSResponder in MacOS does propagate that at startup. This function is not ported to other implementation. Setting "_device-info" being propagated on port 9 does then work well.
> Summed up: Setting both port number to 9 make everything work well. Since "9" is the "discard" port (to my knowledge something like a network "/dev/null") and since there is no real service behind "_device-info" and "_adisk" setting the ports seem reasonable to me.
> Additional info: https://www.illumos.org/issues/10577

Günther Deschner                    GPG-ID: 8EE11688
Red Hat                         gdeschner at redhat.com
Samba Team                              gd at samba.org

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