Connection state of the packet.
.IP \fIct_zone\fR
Connection tracking zone for packet.
+.IP \fIct_mark\fR
+Connection mark of the packet.
+.IP \fIct_label\fR
+Connection label of the packet.
.IP \fItun_id\fR
The tunnel ID on which the packet arrived.
.IP \fIin_port\fR