[avahi] Package: Avahi-daemon 0.6.31 failed apple bonjour test SRV probing/Announcements

[Balaji]

> 
> 
> Hi,
>  
> We are working on to support Apple bonjour conformance test-1.3.0 and 
test fails with avahi version 0.6.31 for test case - SRV 
PROBING/ANNOUNCEMENTS. This test fails both on IPV4 and IPV6. And the 
configured network package - dhcpcd-6.6.4.
> After parsing all logs(Wireshark, apple PC and Linux PC syslog), and 
looks like Avahi  does not support a particular scenario in which Apple 
bonjour conformance test looks for. And also confirmed Apple test is in 
line with the RFC 6762 document for a special use-case(resolving SRV names 
on power up).
> Below is the bug description,
> setup:Apple MAC with Bonjour conformance test - 1.3.0 (latest OS x)Apple 
airport (latest version)Linux device(PC) (AM335x)
> Configure all above devices to communicate on link local mode.
> 1) Start Avahi  bonjour conformance test on APPLE PC and Power ON Linux 
device with Avahi -0.6.31 and with _ssh._tcp.local service file
> 2) First Linux device sends SRV initial probe message on link and 
followed by apple test sends same SRV (Linux device) question on 
link,       example:(commands on wire shark)        Linux Device sends -> 
Who has "SSH" SRV QM question?        Apple Bonjour Conformance Test -> Who 
has "SSH" SRV QM question?
> 3) Then after this there is no message from Linux device on network and 
Apple test expecting new SRV probe message from device.      And so 
conformance test failed, since device couldn't able to send new SRV probe 
message with new name for service "SSH"
> 4) After parsing log files found that,   Avahi -daemon logged service 
with new name ("SSH #2") in log file and could not publish/probe SRV 
message on network.
>   Linux device syslog messages,      Loading service file /etc/Avahi 
/services/ssh.service      Service name conflict for "SSH" (/etc/Avahi 
/services/ssh.service), retrying with "SSH #2).
>  
>  
>  
>  
>  
> Thanks,Balaji
>  
> 
> 
> _______________________________________________
> avahi mailing list
> avahi <at> lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/avahi
> 


Balaji X. Srinivas <bxsrinivas at ...> writes:

I figured out why avahi-0.6.31 package fails the apple bonjour conformance 
test(v1.3.0) for test case SRV PROBING/ANNOUNCEMENTS.

The Bonjour conformance test requires that the hostname and service name on 
the device be resolved at the same time during one point.However avahi 
package waits until the hostname is resolved before resolving the service 
names. 

And also noticed one thing that when device in the state of resolving the 
hostname,device could not probe service with new name though it logged info 
message as service name conflict. 

And so the bonjour test logs following,

"SRV Probing: Device didn't send a new probe after test issued a probe 
denial in response to device's previous query". 


And also verified on more case like, when device gets locked to hostname 
and then device should be able to probe SRV successfully.

I am yet to figure out the actual requirement of this with RFC document.