+ @param current_data_flag - option to use current node's packet payload
+ as the starting point from where packets are classified,
+ This option is only valid for L2/L3 input ACL for now.
+ 0: by default, classify data from the buffer's start location
+ 1: classify packets from VPP node’s current data pointer
+ @param current_data_offset - a signed value to shift the start location of
+ the packet to be classified
+ For example, if input IP ACL node is used, L2 header’s first byte
+ can be accessible by configuring current_data_offset to -14
+ if there is no vlan tag.
+ This is valid only if current_data_flag is set to 1.