[SSSD] [PATCH] dyndns: do not modify global family_order

Jakub Hrozek jhrozek at redhat.com
Thu Sep 5 09:39:08 UTC 2013


On Wed, Sep 04, 2013 at 10:16:01AM +0200, Pavel Březina wrote:
> On 09/03/2013 01:36 PM, Sumit Bose wrote:
> >On Tue, Sep 03, 2013 at 01:22:22PM +0200, Pavel Březina wrote:
> >>On 09/03/2013 12:57 PM, Sumit Bose wrote:
> >>>Hi,
> >>>
> >>>this issue was discovered by a user and as far as I can see it was
> >>>always there. Feel free to apply it to older branches as well.
> >>>
> >>>bye,
> >>>Sumit
> >>
> >>Hi,
> >>>    /* If the resolver is set to honor both address families
> >>>     * and the first one matched, retry the second one to
> >>>     * get the complete list.
> >>>     */
> >>
> >>I haven't tried it, but since you don't change the global family,
> >>wouldn't this always (if not found) hit the condition and invoke new
> >>lookup?
> >
> >Thank you for the comment, it reminded me to check if the setup where I
> >tested the patch really uses both families, which it doesn't. I will
> >recheck in a more suitable environment and send a comment.
> >
> >But nevertheless it should work, because not only the value of the
> >family_order is checked, but the family of the last result as well. So
> >if I read it correctly the if statement below can never be true for the
> >second run.
> >
> >bye,
> >Sumit
> >
> >>
> >>>    /* If the resolver is set to honor both address families
> >>>     * and the first one matched, retry the second one to
> >>>     * get the complete list.
> >>>     */
> >>>    if (((state->be_res->family_order == IPV4_FIRST &&
> >>>          rhostent->family == AF_INET) ||
> >>>        (state->be_res->family_order == IPV6_FIRST &&
> >>>         rhostent->family == AF_INET6))) {
> >>>
> >>>        retry_family_order = (state->be_res->family_order == IPV4_FIRST) ? \
> >>>                             IPV6_ONLY : \
> >>>                             IPV4_ONLY;
> >>>
> >>>        subreq = resolv_gethostbyname_send(state, state->ev,
> >>>                                           state->be_res->resolv,
> >>>                                           state->hostname,
> >>>                                           retry_family_order,
> >>>                                           state->db);
> >>>        if (!subreq) {
> >>>            ret = ENOMEM;
> >>>            goto done;
> >>>        }
> >>>        tevent_req_set_callback(subreq, nsupdate_get_addrs_done, req);
> >>>        return;
> >>>    }
> 
> Hi,
> I've just tried it and it works as expected.
> 
> ACK

Pushed to master and sssd-1-10



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