On Wed, Apr 27, 2016 at 10:27:41AM +0300, Julian Anastasov wrote:
> On Tue, 26 Apr 2016, Marco Angaroni wrote:
> > DoS protection policy that deletes connections to avoid out of memory is
> > currently not effective for SIP-pe plus OPS-mode for two reasons:
> > 1) connection templates (holding SIP call-id) are always skipped in
> > ip_vs_random_dropentry()
> > 2) in_pkts counter (used by drop_entry algorithm) is not incremented
> > for connection templates
> > This patch addresses such problems with the following changes:
> > a) connection templates associated (via their dest) to virtual-services
> > configured in OPS mode are included in ip_vs_random_dropentry()
> > monitoring. This applies to SIP-pe over UDP (which requires OPS mode),
> > but is more general principle: when OPS is controlled by templates
> > memory can be used only by templates themselves, since OPS conns are
> > deleted after packet is forwarded.
> > b) OPS connections, if controlled by a template, cause increment of
> > in_pkts counter of their template. This is already happening but only
> > in case director is in master-slave mode (see ip_vs_sync_conn()).
> > Signed-off-by: Marco Angaroni <marcoangaroni@xxxxxxxxx>
> Looks good to me. Simon, please apply to -next.
> Acked-by: Julian Anastasov <ja@xxxxxx>
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