[Cerowrt-devel] [Dnsmasq-discuss] Names not resolved on Wireless

Fri Oct 11 11:37:52 EDT 2013

On 11/10/13 15:30, Dave Taht wrote:
> On Oct 11, 2013 4:02 AM, "David Personette"<dperson at gmail.com>  wrote:
>>
>> Sorry, it's still behaving the same for me. Failed back to 3.10.11-3 once
> more.
>
> OK I will set aside time Sunday and Monday to poke deeply into this.

I just pushed to git code to log at startup if dnsmasq deploys the 
SO_BINDTODEVICE hack. The compile-time and run-time dependencies to do 
that were frightening. Given that this can and has silently bitten 
people, it's good to be informed.

If you see something like

dnsmasq-dhcp: DHCP, sockets bound exclusively to interface br0

then there's a problem.

I'll try and learn how to flash the router Dave gave me so I can test 
this stuff myself.

Cheers,

Simon.

>
> I note you probably needent revert all the way back to this version. You
> can wget the version of DNSmasq from this versions packages and forcibly
> apply it on top of 3.10.15-4 using opkg.
>
>> --
>> David P.
>>
>>
>> On Thu, Oct 10, 2013 at 8:01 PM, Dave Taht<dave.taht at gmail.com>  wrote:
>>>
>>> 3.10.15-4 is now out there, containing sufficient patches to get
>>> dnsmasq to the current head of tree, and including the patch below.
>>>
>>> http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.10.15-4/
>>>
>>> On Thu, Oct 10, 2013 at 1:23 PM, Simon Kelley<simon at thekelleys.org.uk>
> wrote:
>>>> Having thought about this more, this patch is necessary
>>>>
>>>>
> http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=8584c502d37627d8abe18213771b5f4f98cb4aa3
>>>>
>>>> and should fix the bug iff
>>>>
>>>> 1) Dnsmasq is configured using --except-interface=<upstream interface>
> and
>>>> there are no --interface=<interface we want to provide service on>
> config
>>>> lines.
>>>>
>>>> 2) Exactly one interface that dnsmasq should be listening on is around
> when
>>>> it starts, but others arrive later.
>>>>
>>>> I can't explain why it just broke though, this bug has been around
> forever.
>>>>
>>>>
>>>>
>>>> Simon.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 10/10/13 19:30, Dave Taht wrote:
>>>>>
>>>>> On Thu, Oct 10, 2013 at 9:54 AM, Simon Kelley<simon at thekelleys.org.uk>
>>>>> wrote:
>>>>>>
>>>>>>
>>>>>> Does reverting
>>>>>>
>>>>>>
>>>>>>
> http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=397542b213ab4071734f1cdf4cc914d87100456f
>>>>>>
>>>>>> fix the issue? I fear it might.
>>>>>
>>>>>
>>>>> Seems likely.
>>>>>
>>>>> I reverted that patch and put it in this build
>>>>>
>>>>> http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/3.10.15-3/
>>>>>
>>>>> I won't be in a position to test stuff myself til sunday but cero's
>>>>> devoted userbase seems to be hoovering over the reload button and will
>>>>> probably beat me to it....
>>>>>
>>>>>
>>>>>>
>>>>>> Cheers,
>>>>>>
>>>>>> Simon.
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 10/10/13 15:43, Dave Taht wrote:
>>>>>>>
>>>>>>>
>>>>>>> Dear Dr. Dnsmasq:
>>>>>>>
>>>>>>> When cerowrt made the jump between dnsmasq-2.67-test10 and
>>>>>>> dnsmasq-2.67-test17, detection of interfaces other than the first
>>>>>>> started failing. It seems to be related to interfaces that come up
>>>>>>> after dnsmasq starts, as restarting it after the device is fully
>>>>>>> booted works. Have moved forward to 2.67-rc3 to no avail.
>>>>>>>
>>>>>>> (along the way we migrated from kernel 3.10.11 to 3.10.13 to 3.10.15
>>>>>>> but I doubt that's the issue)
>>>>>>>
>>>>>>> Hot, fresh, firmware can be had at:
>>>>>>>
>>>>>>> http://snapon.lab.bufferbloat.net/~cero2/cerowrt/wndr/
>>>>>>>
>>>>>>>
>>>>>>> <knacky>    [10:39:25] has anyone had IPv4 DHCP problems in the last
> two
>>>>>>> 3.10.x
>>>>>>> builds?  currently running 3.10.11-3 and it works flawlessly.
>>>>>>> upgraded to 3.10.13-2 and 3.10.15-1 and both present me with an
>>>>>>> identical issue.  upon reboot after upgrading, DHCP leases are no
>>>>>>> longer handed out on the wireless interfaces.  disabling and
>>>>>>> re-enabling DHCP on the wireless interfaces will fix the problem,
> but
>>>>>>> the problem
>>>>>>> <knacky>    [10:39:26] returns after a reboot.  disable/reenable
> DHCP on
>>>>>>> the
>>>>>>> interface will again temporarily fix it.
>>>>>>> <knacky>    [10:42:03] also tried a fresh install (using reset to
>>>>>>> defaults
>>>>>>> option) to avoid anything not properly interpreted from the config
> of
>>>>>>> the previous version, but still get the same issue.
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Oct 10, 2013 at 5:30 AM, David Personette<dperson at gmail.com>
>>>>>>> wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>> Just tested again with 3.10.15-2. My OSX (10.8.5) laptop worked,
>>>>>>>> neither
>>>>>>>> my
>>>>>>>> Nexus 7 (2013 w/CM10.2) or my Fedora 19 laptop could resolve DNS
> over
>>>>>>>> wireless. My wired Linux server (Ubuntu 12.04.3) was working fine
> as
>>>>>>>> well.
>>>>>>>> Reverted to 3.10.11-3 once more.
>>>>>>>>
>>>>>>>> --
>>>>>>>> David P.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Oct 7, 2013 at 7:40 PM, David Personette<dperson at gmail.com>
>>>>>>>> wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I can confirm it as well. I wiped my config back to defaults, and
> it
>>>>>>>>> wasn't fixed. Reinstalled the 3.10.11-3 build, and restored my
> configs
>>>>>>>>> and
>>>>>>>>> all is well.
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> David P.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Mon, Oct 7, 2013 at 7:07 PM, Fred Stratton<fredstratton at imap.cc
>>
>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> True for the last two builds. Wired works as expected.
>>>>>>>>>>
>>>>>>>>>> Is this a problem with the development version of DNSMasq? What
> is
>>>>>>>>>> the
>>>>>>>>>> recommended workaround?
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Cerowrt-devel mailing list
>>>>>>>>>> Cerowrt-devel at lists.bufferbloat.net
>>>>>>>>>> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Cerowrt-devel mailing list
>>>>>>>> Cerowrt-devel at lists.bufferbloat.net
>>>>>>>> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Dnsmasq-discuss mailing list
>>>>>> Dnsmasq-discuss at lists.thekelleys.org.uk
>>>>>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> Dave Täht
>>>
>>> Fixing bufferbloat with cerowrt:
> http://www.teklibre.com/cerowrt/subscribe.html
>>> _______________________________________________
>>> Cerowrt-devel mailing list
>>> Cerowrt-devel at lists.bufferbloat.net
>>> https://lists.bufferbloat.net/listinfo/cerowrt-devel
>>
>>
>