ANS(accelerated network stack) is DPDK native TCP/IP stack and also refer to FreeBSD implementation. ANS provides a userspace TCP/IP stack for use with the Intel DPDK. ans: accelerated network stack process. librte_ans: TCP/IP stack static library. ANS use dpdk mbuf, ring, memzone, mempool, timer, spinlock. so zero copy mbuf between dpdk and ANS. librte_anssock: ANS socket lib for application, zer