Re: [PATCHv5 net-next 10/10] openvswitch: Allow attaching helpers to ct action

From: Pravin Shelar
Date: Tue Aug 25 2015 - 16:46:16 EST

On Mon, Aug 24, 2015 at 5:32 PM, Joe Stringer <joestringer@xxxxxxxxxx> wrote:
> Add support for using conntrack helpers to assist protocol detection.
> The new OVS_CT_ATTR_HELPER attribute of the CT action specifies a helper
> to be used for this connection. If no helper is specified, then helpers
> will be automatically applied as per the sysctl configuration of
> net.netfilter.nf_conntrack_helper.
> The helper may be specified as part of the conntrack action, eg:
> ct(helper=ftp). Initial packets for related connections should be
> committed to allow later packets for the flow to be considered
> established.
> Example ovs-ofctl flows allowing FTP connections from ports 1->2:
> in_port=1,tcp,action=ct(helper=ftp,commit),2
> in_port=2,tcp,ct_state=-trk,action=ct(recirc)
> in_port=2,tcp,ct_state=+trk-new+est,action=1
> in_port=2,tcp,ct_state=+trk+rel,action=1
> Signed-off-by: Joe Stringer <joestringer@xxxxxxxxxx>

Acked-by: Pravin B Shelar <pshelar@xxxxxxxxxx>
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at