dhcpcd-discuss

Hi Stefano

On 03/10/2019 11:47, Stefano Cappa wrote:
> Hi Roy,
> I tried applying all 22 commits on top of 8.0.6 and this is the result.
>
> With Bonjour conformance test 1.5.0 it's ok:
>
>     PASSED (INITIAL PROBING)
>     PASSED (PROBING)
>     PASSED (PROBING COMPLETION)
>     PASSED (SUBSEQUENT CONFLICTS)
>     PASSED (CABLE CHANGE HANDLING)
>
> but when I try with version 1.4.0 it fails in this way:
>
>     PASSED (INITIAL PROBING)
>     PASSED (PROBING)
>     PASSED (PROBING COMPLETION)
>
>     NOTICE  12:04:26.862561: Starting test: SUBSEQUENT CONFLICTS
>     NOTICE  12:04:36.864800: Sending ARP reply to device for address
>     169.254.17.101
>     WARNING 12:04:36.876087: Source address non-zero 169.254.17.101
>     WARNING 12:04:36.876123: The host is attempting to defend its IP -
>     sending the second denial
>     NOTICE  12:04:42.989852: Sending second ARP reply to device for
>     address 169.254.17.101
>     ERROR   12:04:43.001238: Did not receive new probe after sending 2
>     conflicting ARP replies for the device's previously acquired  address.
>     FAILED (SUBSEQUENT CONFLICTS)
>
>
>
> Error "NOTICE  12:04:42.989852: Sending second ARP reply to device for 
> address 169.254.17.101" in SUBSEQUENT CONFLICTS test wasn't happening 
> with previous releases, in particular dhcpcd 6.x.x.
> This is a problem because the conformance test stops immediately and it 
> reports a failed result.

My view is this - dhcpcd now passes fine with the newer conformance test 
so there's nothing to fix. Without seeing network traffic or dhcpcd 
debug logs, I don't have anything more to say.

> Also, about multicast test, there is still this issue already reported 
> months ago, but it's probably related to the test itself and not to dhcpcd:
>
>     (...)
>     PASSED (CABLE CHANGE HANDLING)
>
>     NOTICE  12:14:15.130718: Checking if the link-local address is used
>     before the ARP announcement
>
>     *** Beginning Multicast DNS Test ***
>     These service records' TXT records are printed in the final result
>     if encountered:
>     _airplay
>     _ipp
>     _ipps
>     _hap
>     NOTICE  12:14:15.148342: Accepting packets only from address
>     169.254.68.151
>     START (INITIAL PROBING)
>     ERROR   12:14:50.502683: Receive New Probe: Timeout.
>     ERROR   12:15:20.505984: Receive New Probe: Timeout.
>     ERROR   12:15:50.507277: Receive New Probe: Timeout.
>     ERROR   12:16:20.512481: Receive New Probe: Timeout.
>     FAILED (INITIAL PROBING)
>     NOTICE  12:16:20.512942: RETRYING (INITIAL PROBING)
>
>     (...)
>
>
>
> What do you think?

dhcpcd only handles the address configuration, it doens't do any mdns.
You would need something like mDNSResponder (Apple make this open source 
product) to work alongside dhcpcd.

Roy