[Dnsmasq-discuss] Patch to cache SRV records - updated version (#3)

[Simon Kelley]

On 08/01/2019 03:46, Mufasa wrote:
> On 01/07/2019 08:32 AM, Simon Kelley wrote:
>>/I've worked through the patch, and been inspired to clean up a few />/long-standing nasty bits. This has the consequence that the mechanisms />/which were added to enable storage of DNSKEY and DS RRtypes during the />/the DNSSEC campaign are now much more general, and I've used them to />/implement SRV caching. The new code is therefore all mine, as are any />/bugs, but the net effect is the same as Jeremy's (I hope). />//>//>/I didn't implement a config switch to disable caching of SRV records, />/because I can't conceive of a situation where such would be necessary. />//>//>/Code is in the git repo now, and we're eating the new dog food here. />/Please test away./
> 
> New to the list but just wanted to report my experience with the “new
> dog food”.
> 
> I use dnsmasq in Docker and have a script that will fully build my
> configuration from the official Ubuntu docker image and the dnsmasq git
> repository HEAD.  Its been working well for almost a year now.  I only
> once had to rollback a commit when it broke compilation and after some
> waiting, a new commit fixed the issue.
> 
> After updating to commit 5b99eae59d59a8e34a7e512059b98bbd803312f2 today,
> I’m finding that it dies with a "Segmentation fault (core dumped)" in
> about 30 minutes or less.
> 
> I compile it with CFLAGS='-Wall -W -O2 -DNO_IPV6 and launch it with
> /usr/local/sbin/dnsmasq -d --log-facility=/var/log/dnsmasq.log
> 
> If you have any advice on capturing more information about the segfault,
> let me know.
> 

Thanks for the feedback, and for tracking the bleeding-edge code. The
following should help get useful information.

1) Replace -O2 with -g in your compilation flags
2) run the command "ulimit -c unlimited" from the shell you start
dnsmasq from.

When it goes bang, send me the core dump and the dnsmasq binary.


Cheers,

Simon.

> -Daniel
> 
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