Adding UDP Replay VNF without arp support

JIRA: SAMPLEVNF-8

This code adds support for UDP Replay which acts as a reflector of all the
UDP packets on the requested port.

Change-Id: I633e65a4964fab4cc46e2ed09c742dcc63ce6258
Signed-off-by: Deepak S <deepak.s@linux.intel.com>

6 files changed, 3156 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 35aa5f32..7c14693f 100644
--- a/Makefile
+++ b/Makefile
@@ -24,8 +24,9 @@ VNF_DIR      := VNFs
 ACL          := $(VNF_DIR)/vACL
 FW           := $(VNF_DIR)/vFW
 CGNAPT       := $(VNF_DIR)/vCGNAPT
+UDP_Replay   := $(VNF_DIR)/UDP_Replay
 
-subdirs      := $(ACL) $(CGNAPT) $(FW)
+subdirs      := $(ACL) $(CGNAPT) $(FW) $(UDP_Replay)
 
 .PHONY: $(TARGETS) $(subdirs)
 
diff --git a/VNFs/UDP_Replay/Makefile b/VNFs/UDP_Replay/Makefile
new file mode 100644
index 00000000..6e24f0ac
--- /dev/null
+++ b/VNFs/UDP_Replay/Makefile
@@ -0,0 +1,39 @@
+# Copyright (c) 2016-2017 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http:#www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overriden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# binary name
+APP = UDP_Replay
+
+# all source are stored in SRCS-y
+SRCS-y := main.c parse_obj_list.c
+
+CFLAGS += -O3 $(USER_FLAGS)
+CFLAGS += $(WERROR_FLAGS)
+
+# workaround for a gcc bug with noreturn attribute
+# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12603
+ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
+CFLAGS_main.o += -Wno-return-type
+endif
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/VNFs/UDP_Replay/main.c b/VNFs/UDP_Replay/main.c
new file mode 100644
index 00000000..944f522a
--- /dev/null
+++ b/VNFs/UDP_Replay/main.c
@@ -0,0 +1,2870 @@
+/*
+// Copyright (c) 2016-2017 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+/*
+Correlated traffic VNF :
+------------------------
+1. Receive UDP packet
+2. Modify received packet
+     a. exchange src mac and destination mac
+     b. exchange src ip and destination IP for both IPv4 and IPv6 cases
+     c. exchange UDP src port and UDP destination port
+     d. change the len of the response according to the IMIX definition (
+        option to make traffic more realistic to emulate some IoT payloads)
+3. send modified packet to the port where it was received.
+
+Such VNF does not need LPM and routing table implementations.
+As the packet modification is very minimal  and there is no memory access as the packet is stored in L3 cache the
+performance of the solution should be sufficient for testing the UDP NAT performance.
+*/
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include <rte_common.h>
+#include <rte_vect.h>
+#include <rte_byteorder.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_prefetch.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_ip.h>
+#include <rte_tcp.h>
+#include <rte_udp.h>
+#include <rte_string_fns.h>
+
+#include <cmdline_parse.h>
+#include <cmdline_parse_etheraddr.h>
+#include <cmdline_rdline.h>
+#include <cmdline_socket.h>
+#include <cmdline.h>
+#include <cmdline_parse_num.h>
+#include <cmdline_parse_string.h>
+#include <cmdline_parse_ipaddr.h>
+
+#include "parse_obj_list.h"
+
+#define APP_LOOKUP_EXACT_MATCH          0
+#define APP_LOOKUP_LPM                  1
+#define DO_RFC_1812_CHECKS
+#if 1
+#ifndef APP_LOOKUP_METHOD
+#define APP_LOOKUP_METHOD             APP_LOOKUP_EXACT_MATCH
+#endif
+#endif
+
+#include <stdio.h>
+#include <netinet/in.h>
+#include <termios.h>
+
+/*
+ *  When set to zero, simple forwaring path is eanbled.
+ *  When set to one, optimized forwarding path is enabled.
+ *  Note that LPM optimisation path uses SSE4.1 instructions.
+ */
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && !defined(__SSE4_1__))
+#define ENABLE_MULTI_BUFFER_OPTIMIZE	0
+#else
+#define ENABLE_MULTI_BUFFER_OPTIMIZE	1
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+#include <rte_hash.h>
+#elif (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+#include <rte_lpm.h>
+#include <rte_lpm6.h>
+#else
+#error "APP_LOOKUP_METHOD set to incorrect value"
+#endif
+
+#ifndef IPv6_BYTES
+#define IPv6_BYTES_FMT "%02x%02x:%02x%02x:%02x%02x:%02x%02x:"\
+                       "%02x%02x:%02x%02x:%02x%02x:%02x%02x"
+#define IPv6_BYTES(addr) \
+	addr[0],  addr[1], addr[2],  addr[3], \
+	addr[4],  addr[5], addr[6],  addr[7], \
+	addr[8],  addr[9], addr[10], addr[11],\
+	addr[12], addr[13],addr[14], addr[15]
+#endif
+
+
+#define RTE_LOGTYPE_UDP_Replay RTE_LOGTYPE_USER1
+
+#define MAX_JUMBO_PKT_LEN  9600
+
+#define IPV6_ADDR_LEN 16
+
+#define MEMPOOL_CACHE_SIZE 256
+
+/*
+ * This expression is used to calculate the number of mbufs needed depending on user input, taking
+ *  into account memory for rx and tx hardware rings, cache per lcore and mtable per port per lcore.
+ *  RTE_MAX is used to ensure that NB_MBUF never goes below a minimum value of 8192
+ */
+
+#define NB_MBUF RTE_MAX	(																	\
+				(nb_ports*nb_rx_queue*RTE_TEST_RX_DESC_DEFAULT +							\
+				nb_ports*nb_lcores*MAX_PKT_BURST +											\
+				nb_ports*n_tx_queue*RTE_TEST_TX_DESC_DEFAULT +								\
+				nb_lcores*MEMPOOL_CACHE_SIZE),												\
+				(unsigned)8192)
+
+#define MAX_PKT_BURST     32
+#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
+
+/*
+ * Try to avoid TX buffering if we have at least MAX_TX_BURST packets to send.
+ */
+#define	MAX_TX_BURST	(MAX_PKT_BURST / 2)
+
+#define NB_SOCKETS 8
+
+/* Configure how many packets ahead to prefetch, when reading packets */
+#define PREFETCH_OFFSET	3
+
+/* Used to mark destination port as 'invalid'. */
+#define	BAD_PORT	((uint16_t)-1)
+
+#define FWDSTEP	4
+
+/*
+ * Configurable number of RX/TX ring descriptors
+ */
+#define RTE_TEST_RX_DESC_DEFAULT 128
+#define RTE_TEST_TX_DESC_DEFAULT 512
+static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
+static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
+static uint64_t rcv_pkt_count[32] = {0};
+static uint64_t tx_pkt_count[32] = {0};
+
+/* ethernet addresses of ports */
+static uint64_t dest_eth_addr[RTE_MAX_ETHPORTS];
+
+static struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
+
+static __m128i val_eth[RTE_MAX_ETHPORTS];
+
+cmdline_parse_ctx_t main_ctx[];
+
+/* replace first 12B of the ethernet header. */
+#define	MASK_ETH	0x3f
+
+/* mask of enabled ports */
+static uint32_t enabled_port_mask = 0;
+static int promiscuous_on = 0; /**< Ports set in promiscuous mode off by default. */
+static int numa_on = 1; /**< NUMA is enabled by default. */
+static int csum_on = 1; /**< NUMA is enabled by default. */
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+static int ipv6 = 0; /**< ipv6 is false by default. */
+#endif
+
+
+static void
+print_ethaddr(const char *name, const struct ether_addr *eth_addr);
+
+int print_stats(void);
+int clear_stats(void);
+
+struct mbuf_table {
+	uint16_t len;
+	struct rte_mbuf *m_table[MAX_PKT_BURST];
+};
+
+struct lcore_rx_queue {
+	uint8_t port_id;
+	uint8_t queue_id;
+} __rte_cache_aligned;
+
+#define MAX_RX_QUEUE_PER_LCORE 16
+#define MAX_TX_QUEUE_PER_PORT RTE_MAX_ETHPORTS
+#define MAX_RX_QUEUE_PER_PORT 128
+
+#define MAX_LCORE_PARAMS 1024
+struct lcore_params {
+	uint8_t port_id;
+	uint8_t queue_id;
+	uint8_t lcore_id;
+} __rte_cache_aligned;
+
+static struct lcore_params lcore_params_array[MAX_LCORE_PARAMS];
+static struct lcore_params lcore_params_array_default[] = {
+	{0, 0, 2},
+	{0, 1, 2},
+	{0, 2, 2},
+	{1, 0, 2},
+	{1, 1, 2},
+	{1, 2, 2},
+	{2, 0, 2},
+	{3, 0, 3},
+	{3, 1, 3},
+};
+
+static struct lcore_params * lcore_params = lcore_params_array_default;
+static uint16_t nb_lcore_params = sizeof(lcore_params_array_default) /
+				sizeof(lcore_params_array_default[0]);
+
+static struct rte_eth_conf port_conf = {
+	.rxmode = {
+		.mq_mode = ETH_MQ_RX_RSS,
+		.max_rx_pkt_len = ETHER_MAX_LEN,
+		.split_hdr_size = 0,
+		.header_split   = 0, /**< Header Split disabled */
+		.hw_ip_checksum = 1, /**< IP checksum offload enabled */
+		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
+		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
+		.hw_strip_crc   = 0, /**< CRC stripped by hardware */
+	},
+	.rx_adv_conf = {
+		.rss_conf = {
+			.rss_key = NULL,
+			.rss_hf = ETH_RSS_IP,
+		},
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+};
+
+static struct rte_mempool * pktmbuf_pool[NB_SOCKETS];
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+#include <rte_hash_crc.h>
+#define DEFAULT_HASH_FUNC       rte_hash_crc
+#else
+#include <rte_jhash.h>
+#define DEFAULT_HASH_FUNC       rte_jhash
+#endif
+
+struct ipv4_5tuple {
+        uint32_t ip_dst;
+        uint32_t ip_src;
+        uint16_t port_dst;
+        uint16_t port_src;
+        uint8_t  proto;
+} __attribute__((__packed__));
+
+union ipv4_5tuple_host {
+	struct {
+		uint8_t  pad0;
+		uint8_t  proto;
+		uint16_t pad1;
+		uint32_t ip_src;
+		uint32_t ip_dst;
+		uint16_t port_src;
+		uint16_t port_dst;
+	};
+	__m128i xmm;
+};
+
+#define XMM_NUM_IN_IPV6_5TUPLE 3
+
+struct ipv6_5tuple {
+        uint8_t  ip_dst[IPV6_ADDR_LEN];
+        uint8_t  ip_src[IPV6_ADDR_LEN];
+        uint16_t port_dst;
+        uint16_t port_src;
+        uint8_t  proto;
+} __attribute__((__packed__));
+
+union ipv6_5tuple_host {
+	struct {
+		uint16_t pad0;
+		uint8_t  proto;
+		uint8_t  pad1;
+		uint8_t  ip_src[IPV6_ADDR_LEN];
+		uint8_t  ip_dst[IPV6_ADDR_LEN];
+		uint16_t port_src;
+		uint16_t port_dst;
+		uint64_t reserve;
+	};
+	__m128i xmm[XMM_NUM_IN_IPV6_5TUPLE];
+};
+
+struct ipv4_udp_replay_route {
+	struct ipv4_5tuple key;
+	uint8_t if_out;
+};
+
+struct ipv6_udp_replay_route {
+	struct ipv6_5tuple key;
+	uint8_t if_out;
+};
+
+static struct ipv4_udp_replay_route ipv4_udp_replay_route_array[] = {
+	{{IPv4(101,0,0,0), IPv4(100,10,0,1),  101, 11, IPPROTO_TCP}, 0},
+	{{IPv4(201,0,0,0), IPv4(200,20,0,1),  102, 12, IPPROTO_TCP}, 1},
+	{{IPv4(111,0,0,0), IPv4(100,30,0,1),  101, 11, IPPROTO_TCP}, 2},
+	{{IPv4(211,0,0,0), IPv4(200,40,0,1),  102, 12, IPPROTO_TCP}, 3},
+};
+
+static struct ipv6_udp_replay_route ipv6_udp_replay_route_array[] = {
+	{{
+	{0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
+	101, 11, IPPROTO_TCP}, 0},
+
+	{{
+	{0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0x90, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
+	102, 12, IPPROTO_TCP}, 1},
+
+	{{
+	{0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0xa0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
+	101, 11, IPPROTO_TCP}, 2},
+
+	{{
+	{0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1e, 0x67, 0xff, 0xfe, 0, 0, 0},
+	{0xfe, 0xb0, 0, 0, 0, 0, 0, 0, 0x02, 0x1b, 0x21, 0xff, 0xfe, 0x91, 0x38, 0x05},
+	102, 12, IPPROTO_TCP}, 3},
+};
+
+typedef struct rte_hash lookup_struct_t;
+static lookup_struct_t *ipv4_udp_replay_lookup_struct[NB_SOCKETS];
+static lookup_struct_t *ipv6_udp_replay_lookup_struct[NB_SOCKETS];
+
+#ifdef RTE_ARCH_X86_64
+/* default to 4 million hash entries (approx) */
+#define UDP_Replay_HASH_ENTRIES		1024*1024*4
+#else
+/* 32-bit has less address-space for hugepage memory, limit to 1M entries */
+#define UDP_Replay_HASH_ENTRIES		1024*1024*1
+#endif
+#define HASH_ENTRY_NUMBER_DEFAULT	4
+
+static uint32_t hash_entry_number = HASH_ENTRY_NUMBER_DEFAULT;
+
+static inline uint32_t
+ipv4_hash_crc(const void *data, __rte_unused uint32_t data_len,
+	uint32_t init_val)
+{
+	const union ipv4_5tuple_host *k;
+	uint32_t t;
+	const uint32_t *p;
+
+	k = data;
+	t = k->proto;
+	p = (const uint32_t *)&k->port_src;
+
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+	init_val = rte_hash_crc_4byte(t, init_val);
+	init_val = rte_hash_crc_4byte(k->ip_src, init_val);
+	init_val = rte_hash_crc_4byte(k->ip_dst, init_val);
+	init_val = rte_hash_crc_4byte(*p, init_val);
+#else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	init_val = rte_jhash_1word(t, init_val);
+	init_val = rte_jhash_1word(k->ip_src, init_val);
+	init_val = rte_jhash_1word(k->ip_dst, init_val);
+	init_val = rte_jhash_1word(*p, init_val);
+#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	return (init_val);
+}
+
+static inline uint32_t
+ipv6_hash_crc(const void *data, __rte_unused uint32_t data_len, uint32_t init_val)
+{
+	const union ipv6_5tuple_host *k;
+	uint32_t t;
+	const uint32_t *p;
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+	const uint32_t  *ip_src0, *ip_src1, *ip_src2, *ip_src3;
+	const uint32_t  *ip_dst0, *ip_dst1, *ip_dst2, *ip_dst3;
+#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+
+	k = data;
+	t = k->proto;
+	p = (const uint32_t *)&k->port_src;
+
+#ifdef RTE_MACHINE_CPUFLAG_SSE4_2
+	ip_src0 = (const uint32_t *) k->ip_src;
+	ip_src1 = (const uint32_t *)(k->ip_src+4);
+	ip_src2 = (const uint32_t *)(k->ip_src+8);
+	ip_src3 = (const uint32_t *)(k->ip_src+12);
+	ip_dst0 = (const uint32_t *) k->ip_dst;
+	ip_dst1 = (const uint32_t *)(k->ip_dst+4);
+	ip_dst2 = (const uint32_t *)(k->ip_dst+8);
+	ip_dst3 = (const uint32_t *)(k->ip_dst+12);
+	init_val = rte_hash_crc_4byte(t, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src0, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src1, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src2, init_val);
+	init_val = rte_hash_crc_4byte(*ip_src3, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst0, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst1, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst2, init_val);
+	init_val = rte_hash_crc_4byte(*ip_dst3, init_val);
+	init_val = rte_hash_crc_4byte(*p, init_val);
+#else /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	init_val = rte_jhash_1word(t, init_val);
+	init_val = rte_jhash(k->ip_src, sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
+	init_val = rte_jhash(k->ip_dst, sizeof(uint8_t) * IPV6_ADDR_LEN, init_val);
+	init_val = rte_jhash_1word(*p, init_val);
+#endif /* RTE_MACHINE_CPUFLAG_SSE4_2 */
+	return (init_val);
+}
+
+#define IPV4_UDP_Replay_NUM_ROUTES \
+	(sizeof(ipv4_udp_replay_route_array) / sizeof(ipv4_udp_replay_route_array[0]))
+
+#define IPV6_UDP_Replay_NUM_ROUTES \
+	(sizeof(ipv6_udp_replay_route_array) / sizeof(ipv6_udp_replay_route_array[0]))
+
+static uint8_t ipv4_udp_replay_out_if[UDP_Replay_HASH_ENTRIES] __rte_cache_aligned;
+static uint8_t ipv6_udp_replay_out_if[UDP_Replay_HASH_ENTRIES] __rte_cache_aligned;
+
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+struct ipv4_udp_replay_route {
+	uint32_t ip;
+	uint8_t  depth;
+	uint8_t  if_out;
+};
+
+struct ipv6_udp_replay_route {
+	uint8_t ip[16];
+	uint8_t  depth;
+	uint8_t  if_out;
+};
+
+static struct ipv4_udp_replay_route ipv4_udp_replay_route_array[] = {
+	{IPv4(1,1,1,0), 24, 0},
+	{IPv4(2,1,1,0), 24, 1},
+	{IPv4(3,1,1,0), 24, 2},
+	{IPv4(4,1,1,0), 24, 3},
+	{IPv4(5,1,1,0), 24, 4},
+	{IPv4(6,1,1,0), 24, 5},
+	{IPv4(7,1,1,0), 24, 6},
+	{IPv4(8,1,1,0), 24, 7},
+};
+
+static struct ipv6_udp_replay_route ipv6_udp_replay_route_array[] = {
+	{{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 0},
+	{{2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 1},
+	{{3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 2},
+	{{4,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 3},
+	{{5,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 4},
+	{{6,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 5},
+	{{7,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 6},
+	{{8,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 48, 7},
+};
+
+#define IPV4_UDP_Replay_NUM_ROUTES \
+	(sizeof(ipv4_udp_replay_route_array) / sizeof(ipv4_udp_replay_route_array[0]))
+#define IPV6_UDP_Replay_NUM_ROUTES \
+	(sizeof(ipv6_udp_replay_route_array) / sizeof(ipv6_udp_replay_route_array[0]))
+
+#define IPV4_UDP_Replay_LPM_MAX_RULES         1024
+#define IPV6_UDP_Replay_LPM_MAX_RULES         1024
+#define IPV6_UDP_Replay_LPM_NUMBER_TBL8S (1 << 16)
+
+typedef struct rte_lpm lookup_struct_t;
+typedef struct rte_lpm6 lookup6_struct_t;
+static lookup_struct_t *ipv4_udp_replay_lookup_struct[NB_SOCKETS];
+static lookup6_struct_t *ipv6_udp_replay_lookup_struct[NB_SOCKETS];
+#endif
+
+struct lcore_conf {
+	uint16_t n_rx_queue;
+	struct lcore_rx_queue rx_queue_list[MAX_RX_QUEUE_PER_LCORE];
+	uint16_t tx_queue_id[RTE_MAX_ETHPORTS];
+	struct mbuf_table tx_mbufs[RTE_MAX_ETHPORTS];
+	lookup_struct_t * ipv4_lookup_struct;
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+	lookup6_struct_t * ipv6_lookup_struct;
+#else
+	lookup_struct_t * ipv6_lookup_struct;
+#endif
+} __rte_cache_aligned;
+
+static struct lcore_conf lcore_conf[RTE_MAX_LCORE];
+
+/* Send burst of packets on an output interface */
+static inline int
+send_burst(struct lcore_conf *qconf, uint16_t n, uint8_t port)
+{
+	struct rte_mbuf **m_table;
+	int ret;
+	uint16_t queueid;
+
+	queueid = qconf->tx_queue_id[port];
+	m_table = (struct rte_mbuf **)qconf->tx_mbufs[port].m_table;
+
+	ret = rte_eth_tx_burst(port, queueid, m_table, n);
+	if (unlikely(ret < n)) {
+		do {
+			rte_pktmbuf_free(m_table[ret]);
+		} while (++ret < n);
+	}
+	/*Tx Pkt count*/
+	tx_pkt_count[port] += ret;
+	return 0;
+}
+
+/* Enqueue a single packet, and send burst if queue is filled */
+static inline int
+send_single_packet(struct rte_mbuf *m, uint8_t port)
+{
+	uint32_t lcore_id;
+	uint16_t len;
+	struct lcore_conf *qconf;
+
+	lcore_id = rte_lcore_id();
+
+	qconf = &lcore_conf[lcore_id];
+	len = qconf->tx_mbufs[port].len;
+	qconf->tx_mbufs[port].m_table[len] = m;
+	len++;
+
+	/* enough pkts to be sent */
+	if (unlikely(len == MAX_PKT_BURST)) {
+		send_burst(qconf, MAX_PKT_BURST, port);
+		len = 0;
+	}
+
+	qconf->tx_mbufs[port].len = len;
+	return 0;
+}
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+static inline __attribute__((always_inline)) void
+send_packetsx4(struct lcore_conf *qconf, uint8_t port,
+	struct rte_mbuf *m[], uint32_t num)
+{
+	uint32_t len, j, n;
+
+	len = qconf->tx_mbufs[port].len;
+
+	/*
+	 * If TX buffer for that queue is empty, and we have enough packets,
+	 * then send them straightway.
+	 */
+	if (num >= MAX_TX_BURST && len == 0) {
+		n = rte_eth_tx_burst(port, qconf->tx_queue_id[port], m, num);
+		if (unlikely(n < num)) {
+			do {
+				rte_pktmbuf_free(m[n]);
+			} while (++n < num);
+		}
+		return;
+	}
+
+	/*
+	 * Put packets into TX buffer for that queue.
+	 */
+
+	n = len + num;
+	n = (n > MAX_PKT_BURST) ? MAX_PKT_BURST - len : num;
+
+	j = 0;
+	switch (n % FWDSTEP) {
+	while (j < n) {
+	case 0:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	case 3:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	case 2:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	case 1:
+		qconf->tx_mbufs[port].m_table[len + j] = m[j];
+		j++;
+	}
+	}
+
+	len += n;
+
+	/* enough pkts to be sent */
+	if (unlikely(len == MAX_PKT_BURST)) {
+
+		send_burst(qconf, MAX_PKT_BURST, port);
+
+		/* copy rest of the packets into the TX buffer. */
+		len = num - n;
+		j = 0;
+		switch (len % FWDSTEP) {
+		while (j < len) {
+		case 0:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		case 3:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		case 2:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		case 1:
+			qconf->tx_mbufs[port].m_table[j] = m[n + j];
+			j++;
+		}
+		}
+	}
+
+	qconf->tx_mbufs[port].len = len;
+}
+#endif /* APP_LOOKUP_LPM */
+
+#ifdef DO_RFC_1812_CHECKS
+static inline int
+is_valid_ipv4_pkt(struct ipv4_hdr *pkt, uint32_t link_len)
+{
+	/* From http://www.rfc-editor.org/rfc/rfc1812.txt section 5.2.2 */
+	/*
+	 * 1. The packet length reported by the Link Layer must be large
+	 * enough to hold the minimum length legal IP datagram (20 bytes).
+	 */
+	if (link_len < sizeof(struct ipv4_hdr))
+		return -1;
+
+	/* 2. The IP checksum must be correct. */
+	/* this is checked in H/W */
+
+	/*
+	 * 3. The IP version number must be 4. If the version number is not 4
+	 * then the packet may be another version of IP, such as IPng or
+	 * ST-II.
+	 */
+	if (((pkt->version_ihl) >> 4) != 4)
+		return -3;
+	/*
+	 * 4. The IP header length field must be large enough to hold the
+	 * minimum length legal IP datagram (20 bytes = 5 words).
+	 */
+	if ((pkt->version_ihl & 0xf) < 5)
+		return -4;
+
+	/*
+	 * 5. The IP total length field must be large enough to hold the IP
+	 * datagram header, whose length is specified in the IP header length
+	 * field.
+	 */
+	if (rte_cpu_to_be_16(pkt->total_length) < sizeof(struct ipv4_hdr))
+		return -5;
+
+	return 0;
+}
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+
+static __m128i mask0;
+static __m128i mask1;
+static __m128i mask2;
+static inline uint8_t
+get_ipv4_dst_port(void *ipv4_hdr, uint8_t portid, lookup_struct_t * ipv4_udp_replay_lookup_struct)
+{
+	int ret = 0;
+	union ipv4_5tuple_host key;
+
+	ipv4_hdr = (uint8_t *)ipv4_hdr + offsetof(struct ipv4_hdr, time_to_live);
+	__m128i data = _mm_loadu_si128((__m128i*)(ipv4_hdr));
+	/* Get 5 tuple: dst port, src port, dst IP address, src IP address and protocol */
+	key.xmm = _mm_and_si128(data, mask0);
+	/* Find destination port */
+	ret = rte_hash_lookup(ipv4_udp_replay_lookup_struct, (const void *)&key);
+	return (uint8_t)((ret < 0)? portid : ipv4_udp_replay_out_if[ret]);
+}
+
+static inline uint8_t
+get_ipv6_dst_port(void *ipv6_hdr,  uint8_t portid, lookup_struct_t * ipv6_udp_replay_lookup_struct)
+{
+	int ret = 0;
+	union ipv6_5tuple_host key;
+
+	ipv6_hdr = (uint8_t *)ipv6_hdr + offsetof(struct ipv6_hdr, payload_len);
+	__m128i data0 = _mm_loadu_si128((__m128i*)(ipv6_hdr));
+	__m128i data1 = _mm_loadu_si128((__m128i*)(((uint8_t*)ipv6_hdr)+sizeof(__m128i)));
+	__m128i data2 = _mm_loadu_si128((__m128i*)(((uint8_t*)ipv6_hdr)+sizeof(__m128i)+sizeof(__m128i)));
+	/* Get part of 5 tuple: src IP address lower 96 bits and protocol */
+	key.xmm[0] = _mm_and_si128(data0, mask1);
+	/* Get part of 5 tuple: dst IP address lower 96 bits and src IP address higher 32 bits */
+	key.xmm[1] = data1;
+	/* Get part of 5 tuple: dst port and src port and dst IP address higher 32 bits */
+	key.xmm[2] = _mm_and_si128(data2, mask2);
+
+	/* Find destination port */
+	ret = rte_hash_lookup(ipv6_udp_replay_lookup_struct, (const void *)&key);
+	return (uint8_t)((ret < 0)? portid : ipv6_udp_replay_out_if[ret]);
+}
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+
+static inline uint8_t
+get_ipv4_dst_port(void *ipv4_hdr,  uint8_t portid, lookup_struct_t * ipv4_udp_replay_lookup_struct)
+{
+	uint8_t next_hop;
+
+	return (uint8_t) ((rte_lpm_lookup(ipv4_udp_replay_lookup_struct,
+		rte_be_to_cpu_32(((struct ipv4_hdr *)ipv4_hdr)->dst_addr),
+		&next_hop) == 0) ? next_hop : portid);
+}
+
+static inline uint8_t
+get_ipv6_dst_port(void *ipv6_hdr,  uint8_t portid, lookup6_struct_t * ipv6_udp_replay_lookup_struct)
+{
+	uint8_t next_hop;
+	return (uint8_t) ((rte_lpm6_lookup(ipv6_udp_replay_lookup_struct,
+			((struct ipv6_hdr*)ipv6_hdr)->dst_addr, &next_hop) == 0)?
+			next_hop : portid);
+}
+#endif
+
+static inline void udp_replay_simple_replay(struct rte_mbuf *m, uint8_t portid,
+	struct lcore_conf *qconf)  __attribute__((unused));
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+
+#define MASK_ALL_PKTS    0xff
+#define EXCLUDE_1ST_PKT 0xfe
+#define EXCLUDE_2ND_PKT 0xfd
+#define EXCLUDE_3RD_PKT 0xfb
+#define EXCLUDE_4TH_PKT 0xf7
+#define EXCLUDE_5TH_PKT 0xef
+#define EXCLUDE_6TH_PKT 0xdf
+#define EXCLUDE_7TH_PKT 0xbf
+#define EXCLUDE_8TH_PKT 0x7f
+
+static inline void
+simple_ipv4_replay_8pkts(struct rte_mbuf *m[8], uint8_t portid, struct lcore_conf *qconf)
+{
+	struct ether_hdr *eth_hdr[8];
+	struct ether_hdr tmp;
+	struct ipv4_hdr *ipv4_hdr[8];
+	struct udp_hdr *udp_hdr[8];
+
+	eth_hdr[0] = rte_pktmbuf_mtod(m[0], struct ether_hdr *);
+	eth_hdr[1] = rte_pktmbuf_mtod(m[1], struct ether_hdr *);
+	eth_hdr[2] = rte_pktmbuf_mtod(m[2], struct ether_hdr *);
+	eth_hdr[3] = rte_pktmbuf_mtod(m[3], struct ether_hdr *);
+	eth_hdr[4] = rte_pktmbuf_mtod(m[4], struct ether_hdr *);
+	eth_hdr[5] = rte_pktmbuf_mtod(m[5], struct ether_hdr *);
+	eth_hdr[6] = rte_pktmbuf_mtod(m[6], struct ether_hdr *);
+	eth_hdr[7] = rte_pktmbuf_mtod(m[7], struct ether_hdr *);
+
+
+        memset(&tmp,0,sizeof (struct ether_hdr));
+
+        int i;
+        for(i=0;i<8;i++)
+        {
+
+	ether_addr_copy(&eth_hdr[i]->s_addr, &tmp.s_addr);
+	ether_addr_copy(&eth_hdr[i]->d_addr, &eth_hdr[i]->s_addr);
+	ether_addr_copy(&tmp.s_addr, &eth_hdr[i]->d_addr);
+        }
+
+	/* Handle IPv4 headers.*/
+	ipv4_hdr[0] = rte_pktmbuf_mtod_offset(m[0], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv4_hdr[1] = rte_pktmbuf_mtod_offset(m[1], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv4_hdr[2] = rte_pktmbuf_mtod_offset(m[2], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv4_hdr[3] = rte_pktmbuf_mtod_offset(m[3], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv4_hdr[4] = rte_pktmbuf_mtod_offset(m[4], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv4_hdr[5] = rte_pktmbuf_mtod_offset(m[5], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv4_hdr[6] = rte_pktmbuf_mtod_offset(m[6], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv4_hdr[7] = rte_pktmbuf_mtod_offset(m[7], struct ipv4_hdr *,
+					      sizeof(struct ether_hdr));
+        struct ipv4_hdr temp_ipv4;
+        for(i=0;i<8;i++)
+        {
+	temp_ipv4.dst_addr = ipv4_hdr[i]->dst_addr;
+	ipv4_hdr[i]->dst_addr = ipv4_hdr[i]->src_addr;
+	ipv4_hdr[i]->src_addr = temp_ipv4.dst_addr;
+        }
+
+	/* Handle UDP headers.*/
+	udp_hdr[0] = rte_pktmbuf_mtod_offset(m[0], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+
+	udp_hdr[1] = rte_pktmbuf_mtod_offset(m[1], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+	udp_hdr[2] = rte_pktmbuf_mtod_offset(m[2], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+	udp_hdr[3] = rte_pktmbuf_mtod_offset(m[3], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+	udp_hdr[4] = rte_pktmbuf_mtod_offset(m[4], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+	udp_hdr[5] = rte_pktmbuf_mtod_offset(m[5], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+	udp_hdr[6] = rte_pktmbuf_mtod_offset(m[6], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+	udp_hdr[7] = rte_pktmbuf_mtod_offset(m[7], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr));
+       /*1) memcpy or assignment.*/
+
+        struct udp_hdr temp_udp;
+        for(i=0;i<8;i++)
+        {
+	temp_udp.dst_port = udp_hdr[i]->dst_port;
+	udp_hdr[i]->dst_port = udp_hdr[i]->src_port;
+	udp_hdr[i]->src_port = temp_udp.dst_port;
+        }
+#ifdef DO_RFC_1812_CHECKS
+	/* Check to make sure the packet is valid (RFC1812) */
+	uint8_t valid_mask = MASK_ALL_PKTS;
+	if (is_valid_ipv4_pkt(ipv4_hdr[0], m[0]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[0]);
+		valid_mask &= EXCLUDE_1ST_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[1], m[1]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[1]);
+		valid_mask &= EXCLUDE_2ND_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[2], m[2]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[2]);
+		valid_mask &= EXCLUDE_3RD_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[3], m[3]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[3]);
+		valid_mask &= EXCLUDE_4TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[4], m[4]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[4]);
+		valid_mask &= EXCLUDE_5TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[5], m[5]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[5]);
+		valid_mask &= EXCLUDE_6TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[6], m[6]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[6]);
+		valid_mask &= EXCLUDE_7TH_PKT;
+	}
+	if (is_valid_ipv4_pkt(ipv4_hdr[7], m[7]->pkt_len) < 0) {
+		rte_pktmbuf_free(m[7]);
+		valid_mask &= EXCLUDE_8TH_PKT;
+	}
+	if (unlikely(valid_mask != MASK_ALL_PKTS)) {
+		if (valid_mask == 0){
+			return;
+		} else {
+			uint8_t i = 0;
+			for (i = 0; i < 8; i++) {
+				if ((0x1 << i) & valid_mask) {
+					udp_replay_simple_replay(m[i], portid, qconf);
+				}
+			}
+			return;
+		}
+	}
+#endif // End of #ifdef DO_RFC_1812_CHECKS
+
+#ifdef DO_RFC_1812_CHECKS
+	/* Update time to live and header checksum */
+	--(ipv4_hdr[0]->time_to_live);
+	--(ipv4_hdr[1]->time_to_live);
+	--(ipv4_hdr[2]->time_to_live);
+	--(ipv4_hdr[3]->time_to_live);
+	++(ipv4_hdr[0]->hdr_checksum);
+	++(ipv4_hdr[1]->hdr_checksum);
+	++(ipv4_hdr[2]->hdr_checksum);
+	++(ipv4_hdr[3]->hdr_checksum);
+	--(ipv4_hdr[4]->time_to_live);
+	--(ipv4_hdr[5]->time_to_live);
+	--(ipv4_hdr[6]->time_to_live);
+	--(ipv4_hdr[7]->time_to_live);
+	++(ipv4_hdr[4]->hdr_checksum);
+	++(ipv4_hdr[5]->hdr_checksum);
+	++(ipv4_hdr[6]->hdr_checksum);
+	++(ipv4_hdr[7]->hdr_checksum);
+#endif
+
+	send_single_packet(m[0],portid );
+	send_single_packet(m[1],portid );
+	send_single_packet(m[2],portid );
+	send_single_packet(m[3],portid);
+	send_single_packet(m[4],portid);
+	send_single_packet(m[5],portid);
+	send_single_packet(m[6],portid);
+	send_single_packet(m[7],portid);
+
+}
+
+static inline void get_ipv6_5tuple(struct rte_mbuf* m0, __m128i mask0, __m128i mask1,
+				 union ipv6_5tuple_host * key)
+{
+        __m128i tmpdata0 = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m0, __m128i *, sizeof(struct ether_hdr) + offsetof(struct ipv6_hdr, payload_len)));
+        __m128i tmpdata1 = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m0, __m128i *, sizeof(struct ether_hdr) + offsetof(struct ipv6_hdr, payload_len) + sizeof(__m128i)));
+        __m128i tmpdata2 = _mm_loadu_si128(rte_pktmbuf_mtod_offset(m0, __m128i *, sizeof(struct ether_hdr) + offsetof(struct ipv6_hdr, payload_len) + sizeof(__m128i) + sizeof(__m128i)));
+        key->xmm[0] = _mm_and_si128(tmpdata0, mask0);
+        key->xmm[1] = tmpdata1;
+        key->xmm[2] = _mm_and_si128(tmpdata2, mask1);
+	return;
+}
+
+static inline void
+simple_ipv6_replay_8pkts(struct rte_mbuf *m[8], uint8_t portid, struct lcore_conf *qconf)
+{
+	struct ether_hdr *eth_hdr[8],tmp;
+	__attribute__((unused)) struct ipv6_hdr *ipv6_hdr[8], temp_ipv6;
+	int32_t ret[8];
+	union ipv6_5tuple_host key[8];
+	struct udp_hdr *udp_hdr[8];
+
+	eth_hdr[0] = rte_pktmbuf_mtod(m[0], struct ether_hdr *);
+	eth_hdr[1] = rte_pktmbuf_mtod(m[1], struct ether_hdr *);
+	eth_hdr[2] = rte_pktmbuf_mtod(m[2], struct ether_hdr *);
+	eth_hdr[3] = rte_pktmbuf_mtod(m[3], struct ether_hdr *);
+	eth_hdr[4] = rte_pktmbuf_mtod(m[4], struct ether_hdr *);
+	eth_hdr[5] = rte_pktmbuf_mtod(m[5], struct ether_hdr *);
+	eth_hdr[6] = rte_pktmbuf_mtod(m[6], struct ether_hdr *);
+	eth_hdr[7] = rte_pktmbuf_mtod(m[7], struct ether_hdr *);
+
+        memset(&tmp,0,sizeof (struct ether_hdr));
+
+        int i;
+        for(i=0;i<8;i++)
+        {
+	    ether_addr_copy(&eth_hdr[i]->s_addr, &tmp.s_addr);
+	    ether_addr_copy(&eth_hdr[i]->d_addr, &eth_hdr[i]->s_addr);
+	    ether_addr_copy(&tmp.s_addr, &eth_hdr[i]->d_addr);
+        }
+	/* Handle IPv6 headers.*/
+	ipv6_hdr[0] = rte_pktmbuf_mtod_offset(m[0], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv6_hdr[1] = rte_pktmbuf_mtod_offset(m[1], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv6_hdr[2] = rte_pktmbuf_mtod_offset(m[2], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv6_hdr[3] = rte_pktmbuf_mtod_offset(m[3], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv6_hdr[4] = rte_pktmbuf_mtod_offset(m[4], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv6_hdr[5] = rte_pktmbuf_mtod_offset(m[5], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv6_hdr[6] = rte_pktmbuf_mtod_offset(m[6], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+	ipv6_hdr[7] = rte_pktmbuf_mtod_offset(m[7], struct ipv6_hdr *,
+					      sizeof(struct ether_hdr));
+        for(i=0;i<8;i++)
+        {
+           memcpy(temp_ipv6.dst_addr,ipv6_hdr[i]->dst_addr,16);
+           memcpy(ipv6_hdr[i]->dst_addr,ipv6_hdr[i]->src_addr,16);
+           memcpy(ipv6_hdr[i]->src_addr,temp_ipv6.dst_addr,16);
+        }
+
+	/* Handle UDP headers.*/
+	udp_hdr[0] = rte_pktmbuf_mtod_offset(m[0], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+
+	udp_hdr[1] = rte_pktmbuf_mtod_offset(m[1], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+	udp_hdr[2] = rte_pktmbuf_mtod_offset(m[2], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+	udp_hdr[3] = rte_pktmbuf_mtod_offset(m[3], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+	udp_hdr[4] = rte_pktmbuf_mtod_offset(m[4], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+	udp_hdr[5] = rte_pktmbuf_mtod_offset(m[5], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+	udp_hdr[6] = rte_pktmbuf_mtod_offset(m[6], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+	udp_hdr[7] = rte_pktmbuf_mtod_offset(m[7], struct udp_hdr *,
+			 sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr));
+       /*1) memcpy or assignment.*/
+
+        struct udp_hdr temp_udp;
+        for(i=0;i<8;i++)
+        {
+	   temp_udp.dst_port = udp_hdr[i]->dst_port;
+	   udp_hdr[i]->dst_port = udp_hdr[i]->src_port;
+	   udp_hdr[i]->src_port = temp_udp.dst_port;
+        }
+	const void *key_array[8] = {&key[0], &key[1], &key[2], &key[3],
+				&key[4], &key[5], &key[6], &key[7]};
+	rte_hash_lookup_multi(qconf->ipv6_lookup_struct, &key_array[0], 8, ret);
+
+	send_single_packet(m[0],portid);
+	send_single_packet(m[1],portid);
+	send_single_packet(m[2],portid);
+	send_single_packet(m[3],portid);
+	send_single_packet(m[4],portid);
+	send_single_packet(m[5],portid);
+	send_single_packet(m[6],portid);
+	send_single_packet(m[7],portid);
+
+}
+#endif /* APP_LOOKUP_METHOD */
+
+static inline __attribute__((always_inline)) void
+udp_replay_simple_replay(struct rte_mbuf *m, uint8_t portid, struct lcore_conf *qconf)
+{
+	struct ether_hdr *eth_hdr,tmp;
+	struct ipv4_hdr *ipv4_hdr,temp_ipv4;
+	uint8_t dst_port;
+	struct udp_hdr *udp_hdr,temp_udp;
+
+	eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+	ether_addr_copy(&eth_hdr->s_addr, &tmp.s_addr);
+	ether_addr_copy(&eth_hdr->d_addr, &eth_hdr->s_addr);
+	ether_addr_copy(&tmp.s_addr, &eth_hdr->d_addr);
+
+	if (RTE_ETH_IS_IPV4_HDR(m->packet_type)) {
+		/* Handle IPv4 headers.*/
+		ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct ipv4_hdr *,
+						   sizeof(struct ether_hdr));
+	temp_ipv4.dst_addr = ipv4_hdr->dst_addr;
+	ipv4_hdr->dst_addr = ipv4_hdr->src_addr;
+	ipv4_hdr->src_addr = temp_ipv4.dst_addr;
+#ifdef DO_RFC_1812_CHECKS
+		/* Check to make sure the packet is valid (RFC1812) */
+		if (is_valid_ipv4_pkt(ipv4_hdr, m->pkt_len) < 0) {
+			rte_pktmbuf_free(m);
+			return;
+		}
+#endif
+
+		 dst_port = get_ipv4_dst_port(ipv4_hdr, portid,
+			qconf->ipv4_lookup_struct);
+			dst_port = portid;
+
+#ifdef DO_RFC_1812_CHECKS
+		/* Update time to live and header checksum */
+		--(ipv4_hdr->time_to_live);
+		++(ipv4_hdr->hdr_checksum);
+#endif
+	/* Handle UDP headers.*/
+	udp_hdr = rte_pktmbuf_mtod_offset(m, struct udp_hdr *,
+			 (sizeof(struct ether_hdr)+sizeof(struct ipv4_hdr)));
+
+	/*Swapping Src and Dst Port*/
+	temp_udp.dst_port = udp_hdr->dst_port;
+	udp_hdr->dst_port = udp_hdr->src_port;
+	udp_hdr->src_port = temp_udp.dst_port;
+
+		send_single_packet(m, dst_port);
+	} else if (RTE_ETH_IS_IPV6_HDR(m->packet_type)) {
+		/* Handle IPv6 headers.*/
+		struct ipv6_hdr *ipv6_hdr,temp_ipv6;
+
+		ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct ipv6_hdr *,
+						   sizeof(struct ether_hdr));
+
+        /*Swapping of Src and Dst IP address*/
+        memcpy(temp_ipv6.dst_addr,ipv6_hdr->dst_addr,16);
+        memcpy(ipv6_hdr->dst_addr,ipv6_hdr->src_addr,16);
+        memcpy(ipv6_hdr->src_addr,temp_ipv6.dst_addr,16);
+
+
+		dst_port = get_ipv6_dst_port(ipv6_hdr, portid, qconf->ipv6_lookup_struct);
+	/* Handle UDP headers.*/
+	udp_hdr = rte_pktmbuf_mtod_offset(m, struct udp_hdr *,
+			 (sizeof(struct ether_hdr)+sizeof(struct ipv6_hdr)));
+	/*Swapping Src and Dst Port*/
+	temp_udp.dst_port = udp_hdr->dst_port;
+	udp_hdr->dst_port = udp_hdr->src_port;
+	udp_hdr->src_port = temp_udp.dst_port;
+		send_single_packet(m, portid);
+	} else
+		/* Free the mbuf that contains non-IPV4/IPV6 packet */
+		rte_pktmbuf_free(m);
+}
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+#ifdef DO_RFC_1812_CHECKS
+
+#define	IPV4_MIN_VER_IHL	0x45
+#define	IPV4_MAX_VER_IHL	0x4f
+#define	IPV4_MAX_VER_IHL_DIFF	(IPV4_MAX_VER_IHL - IPV4_MIN_VER_IHL)
+
+/* Minimum value of IPV4 total length (20B) in network byte order. */
+#define	IPV4_MIN_LEN_BE	(sizeof(struct ipv4_hdr) << 8)
+
+/*
+ * From http://www.rfc-editor.org/rfc/rfc1812.txt section 5.2.2:
+ * - The IP version number must be 4.
+ * - The IP header length field must be large enough to hold the
+ *    minimum length legal IP datagram (20 bytes = 5 words).
+ * - The IP total length field must be large enough to hold the IP
+ *   datagram header, whose length is specified in the IP header length
+ *   field.
+ * If we encounter invalid IPV4 packet, then set destination port for it
+ * to BAD_PORT value.
+ */
+static inline __attribute__((always_inline)) void
+rfc1812_process(struct ipv4_hdr *ipv4_hdr, uint16_t *dp, uint32_t ptype)
+{
+	uint8_t ihl;
+
+	if (RTE_ETH_IS_IPV4_HDR(ptype)) {
+		ihl = ipv4_hdr->version_ihl - IPV4_MIN_VER_IHL;
+
+		ipv4_hdr->time_to_live--;
+		ipv4_hdr->hdr_checksum++;
+
+		if (ihl > IPV4_MAX_VER_IHL_DIFF ||
+				((uint8_t)ipv4_hdr->total_length == 0 &&
+				ipv4_hdr->total_length < IPV4_MIN_LEN_BE)) {
+			dp[0] = BAD_PORT;
+		}
+	}
+}
+
+#else
+#define	rfc1812_process(mb, dp)	do { } while (0)
+#endif /* DO_RFC_1812_CHECKS */
+#endif /* APP_LOOKUP_LPM && ENABLE_MULTI_BUFFER_OPTIMIZE */
+
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+
+static inline __attribute__((always_inline)) uint16_t
+get_dst_port(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
+	uint32_t dst_ipv4, uint8_t portid)
+{
+	uint8_t next_hop;
+	struct ipv6_hdr *ipv6_hdr;
+	struct ether_hdr *eth_hdr;
+
+	if (RTE_ETH_IS_IPV4_HDR(pkt->packet_type)) {
+		if (rte_lpm_lookup(qconf->ipv4_lookup_struct, dst_ipv4,
+				&next_hop) != 0)
+			next_hop = portid;
+	} else if (RTE_ETH_IS_IPV6_HDR(pkt->packet_type)) {
+		eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
+		ipv6_hdr = (struct ipv6_hdr *)(eth_hdr + 1);
+		if (rte_lpm6_lookup(qconf->ipv6_lookup_struct,
+				ipv6_hdr->dst_addr, &next_hop) != 0)
+			next_hop = portid;
+	} else {
+		next_hop = portid;
+	}
+
+	return next_hop;
+}
+
+static inline void
+process_packet(struct lcore_conf *qconf, struct rte_mbuf *pkt,
+	uint16_t *dst_port, uint8_t portid)
+{
+	struct ether_hdr *eth_hdr;
+	struct ipv4_hdr *ipv4_hdr;
+	uint32_t dst_ipv4;
+	uint16_t dp;
+	__m128i te, ve;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+
+        /*Add swap*/
+	dst_ipv4 = ipv4_hdr->dst_addr;
+	dst_ipv4 = rte_be_to_cpu_32(dst_ipv4);
+
+        /*Changing the dp to incoming port*/
+	dp = get_dst_port(qconf, pkt, dst_ipv4, portid);
+	dp = portid;
+
+	te = _mm_loadu_si128((__m128i *)eth_hdr);
+	ve = val_eth[dp];
+
+	dst_port[0] = dp;
+	rfc1812_process(ipv4_hdr, dst_port, pkt->packet_type);
+
+	te =  _mm_blend_epi16(te, ve, MASK_ETH);
+	_mm_storeu_si128((__m128i *)eth_hdr, te);
+}
+/* Wont be using the following fucntion*/
+
+/*
+ * Read packet_type and destination IPV4 addresses from 4 mbufs.
+ */
+static inline void
+processx4_step1(struct rte_mbuf *pkt[FWDSTEP],
+		__m128i *dip,
+		uint32_t *ipv4_flag)
+{
+	struct ipv4_hdr *ipv4_hdr;
+	struct ether_hdr *eth_hdr;
+	uint32_t x0, x1, x2, x3;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[0], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x0 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] = pkt[0]->packet_type & RTE_PTYPE_L3_IPV4;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[1], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x1 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] &= pkt[1]->packet_type;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[2], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x2 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] &= pkt[2]->packet_type;
+
+	eth_hdr = rte_pktmbuf_mtod(pkt[3], struct ether_hdr *);
+	ipv4_hdr = (struct ipv4_hdr *)(eth_hdr + 1);
+	x3 = ipv4_hdr->dst_addr;
+	ipv4_flag[0] &= pkt[3]->packet_type;
+
+	dip[0] = _mm_set_epi32(x3, x2, x1, x0);
+}
+
+/*
+ * Lookup into LPM for destination port.
+ * If lookup fails, use incoming port (portid) as destination port.
+ */
+static inline void
+processx4_step2(const struct lcore_conf *qconf,
+		__m128i dip,
+		uint32_t ipv4_flag,
+		uint8_t portid,
+		struct rte_mbuf *pkt[FWDSTEP],
+		uint16_t dprt[FWDSTEP])
+{
+	rte_xmm_t dst;
+	const  __m128i bswap_mask = _mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11,
+						4, 5, 6, 7, 0, 1, 2, 3);
+
+	/* Byte swap 4 IPV4 addresses. */
+	dip = _mm_shuffle_epi8(dip, bswap_mask);
+
+	/* if all 4 packets are IPV4. */
+	if (likely(ipv4_flag)) {
+		rte_lpm_lookupx4(qconf->ipv4_lookup_struct, dip, dprt, portid);
+	} else {
+		dst.x = dip;
+		dprt[0] = get_dst_port(qconf, pkt[0], dst.u32[0], portid);
+		dprt[1] = get_dst_port(qconf, pkt[1], dst.u32[1], portid);
+		dprt[2] = get_dst_port(qconf, pkt[2], dst.u32[2], portid);
+		dprt[3] = get_dst_port(qconf, pkt[3], dst.u32[3], portid);
+	}
+}
+
+/*
+ * Update source and destination MAC addresses in the ethernet header.
+ * Perform RFC1812 checks and updates for IPV4 packets.
+ */
+static inline void
+processx4_step3(struct rte_mbuf *pkt[FWDSTEP], uint16_t dst_port[FWDSTEP])
+{
+	__m128i te[FWDSTEP];
+	__m128i ve[FWDSTEP];
+	__m128i *p[FWDSTEP];
+
+	p[0] = rte_pktmbuf_mtod(pkt[0], __m128i *);
+	p[1] = rte_pktmbuf_mtod(pkt[1], __m128i *);
+	p[2] = rte_pktmbuf_mtod(pkt[2], __m128i *);
+	p[3] = rte_pktmbuf_mtod(pkt[3], __m128i *);
+
+	ve[0] = val_eth[dst_port[0]];
+	te[0] = _mm_loadu_si128(p[0]);
+
+	ve[1] = val_eth[dst_port[1]];
+	te[1] = _mm_loadu_si128(p[1]);
+
+	ve[2] = val_eth[dst_port[2]];
+	te[2] = _mm_loadu_si128(p[2]);
+
+	ve[3] = val_eth[dst_port[3]];
+	te[3] = _mm_loadu_si128(p[3]);
+
+	/* Update first 12 bytes, keep rest bytes intact. */
+	te[0] =  _mm_blend_epi16(te[0], ve[0], MASK_ETH);
+	te[1] =  _mm_blend_epi16(te[1], ve[1], MASK_ETH);
+	te[2] =  _mm_blend_epi16(te[2], ve[2], MASK_ETH);
+	te[3] =  _mm_blend_epi16(te[3], ve[3], MASK_ETH);
+
+	_mm_storeu_si128(p[0], te[0]);
+	_mm_storeu_si128(p[1], te[1]);
+	_mm_storeu_si128(p[2], te[2]);
+	_mm_storeu_si128(p[3], te[3]);
+
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[0] + 1),
+		&dst_port[0], pkt[0]->packet_type);
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[1] + 1),
+		&dst_port[1], pkt[1]->packet_type);
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[2] + 1),
+		&dst_port[2], pkt[2]->packet_type);
+	rfc1812_process((struct ipv4_hdr *)((struct ether_hdr *)p[3] + 1),
+		&dst_port[3], pkt[3]->packet_type);
+}
+
+/*
+ * We group consecutive packets with the same destionation port into one burst.
+ * To avoid extra latency this is done together with some other packet
+ * processing, but after we made a final decision about packet's destination.
+ * To do this we maintain:
+ * pnum - array of number of consecutive packets with the same dest port for
+ * each packet in the input burst.
+ * lp - pointer to the last updated element in the pnum.
+ * dlp - dest port value lp corresponds to.
+ */
+
+#define	GRPSZ	(1 << FWDSTEP)
+#define	GRPMSK	(GRPSZ - 1)
+
+#define GROUP_PORT_STEP(dlp, dcp, lp, pn, idx)	do { \
+	if (likely((dlp) == (dcp)[(idx)])) {         \
+		(lp)[0]++;                           \
+	} else {                                     \
+		(dlp) = (dcp)[idx];                  \
+		(lp) = (pn) + (idx);                 \
+		(lp)[0] = 1;                         \
+	}                                            \
+} while (0)
+
+/*
+ * Group consecutive packets with the same destination port in bursts of 4.
+ * Suppose we have array of destionation ports:
+ * dst_port[] = {a, b, c, d,, e, ... }
+ * dp1 should contain: <a, b, c, d>, dp2: <b, c, d, e>.
+ * We doing 4 comparisions at once and the result is 4 bit mask.
+ * This mask is used as an index into prebuild array of pnum values.
+ */
+static inline uint16_t *
+port_groupx4(uint16_t pn[FWDSTEP + 1], uint16_t *lp, __m128i dp1, __m128i dp2)
+{
+	static const struct {
+		uint64_t pnum; /* prebuild 4 values for pnum[]. */
+		int32_t  idx;  /* index for new last updated elemnet. */
+		uint16_t lpv;  /* add value to the last updated element. */
+	} gptbl[GRPSZ] = {
+	{
+		/* 0: a != b, b != c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100010001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 1: a == b, b != c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100010002),
+		.idx = 4,
+		.lpv = 1,
+	},
+	{
+		/* 2: a != b, b == c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100020001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 3: a == b, b == c, c != d, d != e */
+		.pnum = UINT64_C(0x0001000100020003),
+		.idx = 4,
+		.lpv = 2,
+	},
+	{
+		/* 4: a != b, b != c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200010001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 5: a == b, b != c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200010002),
+		.idx = 4,
+		.lpv = 1,
+	},
+	{
+		/* 6: a != b, b == c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200030001),
+		.idx = 4,
+		.lpv = 0,
+	},
+	{
+		/* 7: a == b, b == c, c == d, d != e */
+		.pnum = UINT64_C(0x0001000200030004),
+		.idx = 4,
+		.lpv = 3,
+	},
+	{
+		/* 8: a != b, b != c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100010001),
+		.idx = 3,
+		.lpv = 0,
+	},
+	{
+		/* 9: a == b, b != c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100010002),
+		.idx = 3,
+		.lpv = 1,
+	},
+	{
+		/* 0xa: a != b, b == c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100020001),
+		.idx = 3,
+		.lpv = 0,
+	},
+	{
+		/* 0xb: a == b, b == c, c != d, d == e */
+		.pnum = UINT64_C(0x0002000100020003),
+		.idx = 3,
+		.lpv = 2,
+	},
+	{
+		/* 0xc: a != b, b != c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300010001),
+		.idx = 2,
+		.lpv = 0,
+	},
+	{
+		/* 0xd: a == b, b != c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300010002),
+		.idx = 2,
+		.lpv = 1,
+	},
+	{
+		/* 0xe: a != b, b == c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300040001),
+		.idx = 1,
+		.lpv = 0,
+	},
+	{
+		/* 0xf: a == b, b == c, c == d, d == e */
+		.pnum = UINT64_C(0x0002000300040005),
+		.idx = 0,
+		.lpv = 4,
+	},
+	};
+
+	union {
+		uint16_t u16[FWDSTEP + 1];
+		uint64_t u64;
+	} *pnum = (void *)pn;
+
+	int32_t v;
+
+	dp1 = _mm_cmpeq_epi16(dp1, dp2);
+	dp1 = _mm_unpacklo_epi16(dp1, dp1);
+	v = _mm_movemask_ps((__m128)dp1);
+
+	/* update last port counter. */
+	lp[0] += gptbl[v].lpv;
+
+	/* if dest port value has changed. */
+	if (v != GRPMSK) {
+		lp = pnum->u16 + gptbl[v].idx;
+		lp[0] = 1;
+		pnum->u64 = gptbl[v].pnum;
+	}
+
+	return lp;
+}
+
+#endif /* APP_LOOKUP_METHOD */
+
+/* main processing loop */
+static int
+main_loop(__attribute__((unused)) void *dummy)
+{
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	unsigned lcore_id;
+	uint64_t prev_tsc, diff_tsc, cur_tsc;
+	int i, j, nb_rx;
+	uint8_t portid, queueid;
+	struct lcore_conf *qconf;
+	const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) /
+		US_PER_S * BURST_TX_DRAIN_US;
+
+#if ((APP_LOOKUP_METHOD == APP_LOOKUP_LPM) && \
+	(ENABLE_MULTI_BUFFER_OPTIMIZE == 1))
+	int32_t k;
+	uint16_t dlp;
+	uint16_t *lp;
+	uint16_t dst_port[MAX_PKT_BURST];
+	__m128i dip[MAX_PKT_BURST / FWDSTEP];
+	uint32_t ipv4_flag[MAX_PKT_BURST / FWDSTEP];
+	uint16_t pnum[MAX_PKT_BURST + 1];
+#endif
+
+	prev_tsc = 0;
+
+	lcore_id = rte_lcore_id();
+	qconf = &lcore_conf[lcore_id];
+
+	if (qconf->n_rx_queue == 0) {
+		RTE_LOG(INFO, UDP_Replay, "lcore %u has nothing to do\n", lcore_id);
+		return 0;
+	}
+
+	RTE_LOG(INFO, UDP_Replay, "entering main loop on lcore %u\n", lcore_id);
+
+	for (i = 0; i < qconf->n_rx_queue; i++) {
+
+		portid = qconf->rx_queue_list[i].port_id;
+		queueid = qconf->rx_queue_list[i].queue_id;
+		RTE_LOG(INFO, UDP_Replay, " -- lcoreid=%u portid=%hhu rxqueueid=%hhu\n", lcore_id,
+			portid, queueid);
+	}
+
+	while (1) {
+
+		cur_tsc = rte_rdtsc();
+
+		/*
+		 * TX burst queue drain
+		 */
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > drain_tsc)) {
+
+			/*
+			 * This could be optimized (use queueid instead of
+			 * portid), but it is not called so often
+			 */
+			for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+				if (qconf->tx_mbufs[portid].len == 0)
+					continue;
+				send_burst(qconf,
+					qconf->tx_mbufs[portid].len,
+					portid);
+				qconf->tx_mbufs[portid].len = 0;
+			}
+
+			prev_tsc = cur_tsc;
+		}
+
+		/*
+		 * Read packet from RX queues
+		 */
+		for (i = 0; i < qconf->n_rx_queue; ++i) {
+			portid = qconf->rx_queue_list[i].port_id;
+			queueid = qconf->rx_queue_list[i].queue_id;
+			nb_rx = rte_eth_rx_burst(portid, queueid, pkts_burst,
+				MAX_PKT_BURST);
+			if(nb_rx)
+			    rcv_pkt_count[portid] += nb_rx;
+			if (nb_rx == 0)
+				continue;
+
+#if (ENABLE_MULTI_BUFFER_OPTIMIZE == 1)
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+			{
+				/*
+				 * Send nb_rx - nb_rx%8 packets
+				 * in groups of 8.
+				 */
+				int32_t n = RTE_ALIGN_FLOOR(nb_rx, 8);
+				for (j = 0; j < n; j += 8) {
+					uint32_t pkt_type =
+						pkts_burst[j]->packet_type &
+						pkts_burst[j+1]->packet_type &
+						pkts_burst[j+2]->packet_type &
+						pkts_burst[j+3]->packet_type &
+						pkts_burst[j+4]->packet_type &
+						pkts_burst[j+5]->packet_type &
+						pkts_burst[j+6]->packet_type &
+						pkts_burst[j+7]->packet_type;
+					if (pkt_type & RTE_PTYPE_L3_IPV4) {
+						simple_ipv4_replay_8pkts(
+						&pkts_burst[j], portid, qconf);
+					} else if (pkt_type &
+						RTE_PTYPE_L3_IPV6) {
+						simple_ipv6_replay_8pkts(&pkts_burst[j],
+									portid, qconf);
+					} else {
+						udp_replay_simple_replay(pkts_burst[j],
+									portid, qconf);
+						udp_replay_simple_replay(pkts_burst[j+1],
+									portid, qconf);
+						udp_replay_simple_replay(pkts_burst[j+2],
+									portid, qconf);
+						udp_replay_simple_replay(pkts_burst[j+3],
+									portid, qconf);
+						udp_replay_simple_replay(pkts_burst[j+4],
+									portid, qconf);
+						udp_replay_simple_replay(pkts_burst[j+5],
+									portid, qconf);
+						udp_replay_simple_replay(pkts_burst[j+6],
+									portid, qconf);
+						udp_replay_simple_replay(pkts_burst[j+7],
+									portid, qconf);
+					}
+				}
+				for (; j < nb_rx ; j++) {
+					udp_replay_simple_replay(pkts_burst[j],
+								portid, qconf);
+				}
+			}
+#elif (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+
+			k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
+			for (j = 0; j != k; j += FWDSTEP) {
+				processx4_step1(&pkts_burst[j],
+					&dip[j / FWDSTEP],
+					&ipv4_flag[j / FWDSTEP]);
+			}
+
+			k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
+			for (j = 0; j != k; j += FWDSTEP) {
+				processx4_step2(qconf, dip[j / FWDSTEP],
+					ipv4_flag[j / FWDSTEP], portid,
+					&pkts_burst[j], &dst_port[j]);
+			}
+
+			/*
+			 * Finish packet processing and group consecutive
+			 * packets with the same destination port.
+			 */
+			k = RTE_ALIGN_FLOOR(nb_rx, FWDSTEP);
+			if (k != 0) {
+				__m128i dp1, dp2;
+
+				lp = pnum;
+				lp[0] = 1;
+
+				processx4_step3(pkts_burst, dst_port);
+
+				/* dp1: <d[0], d[1], d[2], d[3], ... > */
+				dp1 = _mm_loadu_si128((__m128i *)dst_port);
+
+				for (j = FWDSTEP; j != k; j += FWDSTEP) {
+					processx4_step3(&pkts_burst[j],
+						&dst_port[j]);
+
+					/*
+					 * dp2:
+					 * <d[j-3], d[j-2], d[j-1], d[j], ... >
+					 */
+					dp2 = _mm_loadu_si128((__m128i *)
+						&dst_port[j - FWDSTEP + 1]);
+					lp  = port_groupx4(&pnum[j - FWDSTEP],
+						lp, dp1, dp2);
+
+					/*
+					 * dp1:
+					 * <d[j], d[j+1], d[j+2], d[j+3], ... >
+					 */
+					dp1 = _mm_srli_si128(dp2,
+						(FWDSTEP - 1) *
+						sizeof(dst_port[0]));
+				}
+
+				/*
+				 * dp2: <d[j-3], d[j-2], d[j-1], d[j-1], ... >
+				 */
+				dp2 = _mm_shufflelo_epi16(dp1, 0xf9);
+				lp  = port_groupx4(&pnum[j - FWDSTEP], lp,
+					dp1, dp2);
+
+				/*
+				 * remove values added by the last repeated
+				 * dst port.
+				 */
+				lp[0]--;
+				dlp = dst_port[j - 1];
+			} else {
+				/* set dlp and lp to the never used values. */
+				dlp = BAD_PORT - 1;
+				lp = pnum + MAX_PKT_BURST;
+			}
+
+			/* Process up to last 3 packets one by one. */
+			switch (nb_rx % FWDSTEP) {
+			case 3:
+				process_packet(qconf, pkts_burst[j],
+					dst_port + j, portid);
+				GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
+				j++;
+			case 2:
+				process_packet(qconf, pkts_burst[j],
+					dst_port + j, portid);
+				GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
+				j++;
+			case 1:
+				process_packet(qconf, pkts_burst[j],
+					dst_port + j, portid);
+				GROUP_PORT_STEP(dlp, dst_port, lp, pnum, j);
+				j++;
+			}
+
+			/*
+			 * Send packets out, through destination port.
+			 * Consecuteve pacekts with the same destination port
+			 * are already grouped together.
+			 * If destination port for the packet equals BAD_PORT,
+			 * then free the packet without sending it out.
+			 */
+			for (j = 0; j < nb_rx; j += k) {
+
+				int32_t m;
+				uint16_t pn;
+
+				pn = dst_port[j];
+				k = pnum[j];
+
+				if (likely(pn != BAD_PORT)) {
+					send_packetsx4(qconf, pn,
+						pkts_burst + j, k);
+				} else {
+					for (m = j; m != j + k; m++)
+						rte_pktmbuf_free(pkts_burst[m]);
+				}
+			}
+
+#endif /* APP_LOOKUP_METHOD */
+#else /* ENABLE_MULTI_BUFFER_OPTIMIZE == 0 */
+
+			/* Prefetch first packets */
+			for (j = 0; j < PREFETCH_OFFSET && j < nb_rx; j++) {
+				rte_prefetch0(rte_pktmbuf_mtod(
+						pkts_burst[j], void *));
+			}
+
+			/* Prefetch and forward already prefetched packets */
+			for (j = 0; j < (nb_rx - PREFETCH_OFFSET); j++) {
+				rte_prefetch0(rte_pktmbuf_mtod(pkts_burst[
+						j + PREFETCH_OFFSET], void *));
+				udp_replay_simple_replay(pkts_burst[j], portid,
+					qconf);
+			}
+
+			/* Forward remaining prefetched packets */
+			for (; j < nb_rx; j++) {
+				udp_replay_simple_replay(pkts_burst[j], portid,
+					qconf);
+			}
+#endif /* ENABLE_MULTI_BUFFER_OPTIMIZE */
+		}
+	}
+}
+
+/* display usage */
+int
+print_stats(void)
+{
+	unsigned portid;
+	uint16_t i;
+	printf ("\n");
+	printf ("UDP_Replay stats:\n");
+	printf ("--------------\n");
+	printf (" Port		Rx Packet		Tx Packet		Rx Pkt Drop		Tx Pkt Drop \n");
+	for (i = 0; i < nb_lcore_params; ++i) {
+		portid = lcore_params[i].port_id;
+		printf (" %u		%lu		%lu			0			0", portid, rcv_pkt_count[(uint64_t)portid], tx_pkt_count[(uint64_t)portid]);
+		printf ("\n");
+	}
+	printf ("\n");
+	return 0;
+
+}
+
+int
+clear_stats(void)
+{
+        uint64_t i;
+        for (i = 0; i < 32; i++) {
+            rcv_pkt_count[i] = 0;
+            tx_pkt_count[i] = 0;
+        }
+	print_stats();
+	return 0;
+}
+
+static int
+check_lcore_params(void)
+{
+	uint8_t queue, lcore;
+	uint16_t i;
+	int socketid;
+
+	for (i = 0; i < nb_lcore_params; ++i) {
+		queue = lcore_params[i].queue_id;
+		if (queue >= MAX_RX_QUEUE_PER_PORT) {
+			printf("invalid queue number: %hhu\n", queue);
+			return -1;
+		}
+		lcore = lcore_params[i].lcore_id;
+		if (!rte_lcore_is_enabled(lcore)) {
+			printf("error: lcore %hhu is not enabled in lcore mask\n", lcore);
+			return -1;
+		}
+		if ((socketid = rte_lcore_to_socket_id(lcore) != 0) &&
+			(numa_on == 0)) {
+			printf("warning: lcore %hhu is on socket %d with numa off \n",
+				lcore, socketid);
+		}
+	}
+	return 0;
+}
+
+static int
+check_port_config(const unsigned nb_ports)
+{
+	unsigned portid;
+	uint16_t i;
+
+	for (i = 0; i < nb_lcore_params; ++i) {
+		portid = lcore_params[i].port_id;
+		if ((enabled_port_mask & (1 << portid)) == 0) {
+			printf("port %u is not enabled in port mask\n", portid);
+			return -1;
+		}
+		if (portid >= nb_ports) {
+			printf("port %u is not present on the board\n", portid);
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static uint8_t
+get_port_n_rx_queues(const uint8_t port)
+{
+	int queue = -1;
+	uint16_t i;
+
+	for (i = 0; i < nb_lcore_params; ++i) {
+		if (lcore_params[i].port_id == port && lcore_params[i].queue_id > queue)
+			queue = lcore_params[i].queue_id;
+	}
+	return (uint8_t)(++queue);
+}
+
+static int
+init_lcore_rx_queues(void)
+{
+	uint16_t i, nb_rx_queue;
+	uint8_t lcore;
+
+	for (i = 0; i < nb_lcore_params; ++i) {
+		lcore = lcore_params[i].lcore_id;
+		nb_rx_queue = lcore_conf[lcore].n_rx_queue;
+		if (nb_rx_queue >= MAX_RX_QUEUE_PER_LCORE) {
+			printf("error: too many queues (%u) for lcore: %u\n",
+				(unsigned)nb_rx_queue + 1, (unsigned)lcore);
+			return -1;
+		} else {
+			lcore_conf[lcore].rx_queue_list[nb_rx_queue].port_id =
+				lcore_params[i].port_id;
+			lcore_conf[lcore].rx_queue_list[nb_rx_queue].queue_id =
+				lcore_params[i].queue_id;
+			lcore_conf[lcore].n_rx_queue++;
+		}
+	}
+	return 0;
+}
+
+/* display usage */
+static void
+print_usage(const char *prgname)
+{
+	printf ("%s [EAL options] -- -p PORTMASK -P"
+		"  [--config (port,queue,lcore)[,(port,queue,lcore]]"
+		"  [--enable-jumbo [--max-pkt-len PKTLEN]]\n"
+		"  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
+		"  -P : enable promiscuous mode\n"
+		"  --config (port,queue,lcore): rx queues configuration\n"
+		"  --eth-dest=X,MM:MM:MM:MM:MM:MM: optional, ethernet destination for port X\n"
+		"  --no-numa: optional, disable numa awareness\n"
+		"  --no-hw-csum: optional, disable hw ip checksum\n"
+		"  --ipv6: optional, specify it if running ipv6 packets\n"
+		"  --enable-jumbo: enable jumbo frame"
+		" which max packet len is PKTLEN in decimal (64-9600)\n"
+		"  --hash-entry-num: specify the hash entry number in hexadecimal to be setup\n",
+		prgname);
+}
+
+static int parse_max_pkt_len(const char *pktlen)
+{
+	char *end = NULL;
+	unsigned long len;
+
+	/* parse decimal string */
+	len = strtoul(pktlen, &end, 10);
+	if ((pktlen[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (len == 0)
+		return -1;
+
+	return len;
+}
+
+static int
+parse_portmask(const char *portmask)
+{
+	char *end = NULL;
+	unsigned long pm;
+
+	/* parse hexadecimal string */
+	pm = strtoul(portmask, &end, 16);
+	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (pm == 0)
+		return -1;
+
+	return pm;
+}
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+static int
+parse_hash_entry_number(const char *hash_entry_num)
+{
+	char *end = NULL;
+	unsigned long hash_en;
+	/* parse hexadecimal string */
+	hash_en = strtoul(hash_entry_num, &end, 16);
+	if ((hash_entry_num[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (hash_en == 0)
+		return -1;
+
+	return hash_en;
+}
+#endif
+
+static int
+parse_config(const char *q_arg)
+{
+	char s[256];
+	const char *p, *p0 = q_arg;
+	char *end;
+	enum fieldnames {
+		FLD_PORT = 0,
+		FLD_QUEUE,
+		FLD_LCORE,
+		_NUM_FLD
+	};
+	unsigned long int_fld[_NUM_FLD];
+	char *str_fld[_NUM_FLD];
+	int i;
+	unsigned size;
+
+	nb_lcore_params = 0;
+
+	while ((p = strchr(p0,'(')) != NULL) {
+		++p;
+		if((p0 = strchr(p,')')) == NULL)
+			return -1;
+
+		size = p0 - p;
+		if(size >= sizeof(s))
+			return -1;
+
+		snprintf(s, sizeof(s), "%.*s", size, p);
+		if (rte_strsplit(s, sizeof(s), str_fld, _NUM_FLD, ',') != _NUM_FLD)
+			return -1;
+		for (i = 0; i < _NUM_FLD; i++){
+			errno = 0;
+			int_fld[i] = strtoul(str_fld[i], &end, 0);
+			if (errno != 0 || end == str_fld[i] || int_fld[i] > 255)
+				return -1;
+		}
+		if (nb_lcore_params >= MAX_LCORE_PARAMS) {
+			printf("exceeded max number of lcore params: %hu\n",
+				nb_lcore_params);
+			return -1;
+		}
+		lcore_params_array[nb_lcore_params].port_id = (uint8_t)int_fld[FLD_PORT];
+		lcore_params_array[nb_lcore_params].queue_id = (uint8_t)int_fld[FLD_QUEUE];
+		lcore_params_array[nb_lcore_params].lcore_id = (uint8_t)int_fld[FLD_LCORE];
+		++nb_lcore_params;
+	}
+	lcore_params = lcore_params_array;
+	return 0;
+}
+
+static void
+parse_eth_dest(const char *optarg)
+{
+	uint8_t portid;
+	char *port_end;
+	uint8_t c, *dest, peer_addr[6];
+
+	errno = 0;
+	portid = strtoul(optarg, &port_end, 10);
+	if (errno != 0 || port_end == optarg || *port_end++ != ',')
+		rte_exit(EXIT_FAILURE,
+		"Invalid eth-dest: %s", optarg);
+	if (portid >= RTE_MAX_ETHPORTS)
+		rte_exit(EXIT_FAILURE,
+		"eth-dest: port %d >= RTE_MAX_ETHPORTS(%d)\n",
+		portid, RTE_MAX_ETHPORTS);
+
+	if (cmdline_parse_etheraddr(NULL, port_end,
+		&peer_addr, sizeof(peer_addr)) < 0)
+		rte_exit(EXIT_FAILURE,
+		"Invalid ethernet address: %s\n",
+		port_end);
+	dest = (uint8_t *)&dest_eth_addr[portid];
+	for (c = 0; c < 6; c++)
+		dest[c] = peer_addr[c];
+	*(uint64_t *)(val_eth + portid) = dest_eth_addr[portid];
+}
+
+#define CMD_LINE_OPT_CONFIG "config"
+#define CMD_LINE_OPT_ETH_DEST "eth-dest"
+#define CMD_LINE_OPT_NO_NUMA "no-numa"
+#define CMD_LINE_OPT_NO_HW_CSUM "no-hw-csum"
+#define CMD_LINE_OPT_IPV6 "ipv6"
+#define CMD_LINE_OPT_ENABLE_JUMBO "enable-jumbo"
+#define CMD_LINE_OPT_HASH_ENTRY_NUM "hash-entry-num"
+
+/* Parse the argument given in the command line of the application */
+static int
+parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char **argvopt;
+	int option_index;
+	char *prgname = argv[0];
+	static struct option lgopts[] = {
+		{CMD_LINE_OPT_CONFIG, 1, 0, 0},
+		{CMD_LINE_OPT_ETH_DEST, 1, 0, 0},
+		{CMD_LINE_OPT_NO_NUMA, 0, 0, 0},
+		{CMD_LINE_OPT_NO_HW_CSUM, 0, 0, 0},
+		{CMD_LINE_OPT_IPV6, 0, 0, 0},
+		{CMD_LINE_OPT_ENABLE_JUMBO, 0, 0, 0},
+		{CMD_LINE_OPT_HASH_ENTRY_NUM, 1, 0, 0},
+		{NULL, 0, 0, 0}
+	};
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "p:P",
+				lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+		/* portmask */
+		case 'p':
+			enabled_port_mask = parse_portmask(optarg);
+			if (enabled_port_mask == 0) {
+				printf("invalid portmask\n");
+				print_usage(prgname);
+				return -1;
+			}
+			break;
+		case 'P':
+			printf("Promiscuous mode selected\n");
+			promiscuous_on = 1;
+			break;
+
+		/* long options */
+		case 0:
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_CONFIG,
+				sizeof (CMD_LINE_OPT_CONFIG))) {
+				ret = parse_config(optarg);
+				if (ret) {
+					printf("invalid config\n");
+					print_usage(prgname);
+					return -1;
+				}
+			}
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_ETH_DEST,
+				sizeof(CMD_LINE_OPT_ETH_DEST))) {
+					parse_eth_dest(optarg);
+			}
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_NO_NUMA,
+				sizeof(CMD_LINE_OPT_NO_NUMA))) {
+				printf("numa is disabled \n");
+				numa_on = 0;
+			}
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_NO_HW_CSUM,
+				sizeof(CMD_LINE_OPT_NO_HW_CSUM))) {
+				printf("numa is hw ip checksum \n");
+				port_conf.rxmode.hw_ip_checksum = 0;
+				csum_on = 0;
+			}
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_IPV6,
+				sizeof(CMD_LINE_OPT_IPV6))) {
+				printf("ipv6 is specified \n");
+				ipv6 = 1;
+			}
+#endif
+
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_ENABLE_JUMBO,
+				sizeof (CMD_LINE_OPT_ENABLE_JUMBO))) {
+				struct option lenopts = {"max-pkt-len", required_argument, 0, 0};
+
+				printf("jumbo frame is enabled - disabling simple TX path\n");
+				port_conf.rxmode.jumbo_frame = 1;
+
+				/* if no max-pkt-len set, use the default value ETHER_MAX_LEN */
+				if (0 == getopt_long(argc, argvopt, "", &lenopts, &option_index)) {
+					ret = parse_max_pkt_len(optarg);
+					if ((ret < 64) || (ret > MAX_JUMBO_PKT_LEN)){
+						printf("invalid packet length\n");
+						print_usage(prgname);
+						return -1;
+					}
+					port_conf.rxmode.max_rx_pkt_len = ret;
+				}
+				printf("set jumbo frame max packet length to %u\n",
+						(unsigned int)port_conf.rxmode.max_rx_pkt_len);
+			}
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+			if (!strncmp(lgopts[option_index].name, CMD_LINE_OPT_HASH_ENTRY_NUM,
+				sizeof(CMD_LINE_OPT_HASH_ENTRY_NUM))) {
+				ret = parse_hash_entry_number(optarg);
+				if ((ret > 0) && (ret <= UDP_Replay_HASH_ENTRIES)) {
+					hash_entry_number = ret;
+				} else {
+					printf("invalid hash entry number\n");
+					print_usage(prgname);
+					return -1;
+				}
+			}
+#endif
+			break;
+
+		default:
+			print_usage(prgname);
+			return -1;
+		}
+	}
+
+	if (optind >= 0)
+		argv[optind-1] = prgname;
+
+	ret = optind-1;
+	optind = 0; /* reset getopt lib */
+	return ret;
+}
+
+static void
+print_ethaddr(const char *name, const struct ether_addr *eth_addr)
+{
+	char buf[ETHER_ADDR_FMT_SIZE];
+	ether_format_addr(buf, ETHER_ADDR_FMT_SIZE, eth_addr);
+	printf("%s%s", name, buf);
+}
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_EXACT_MATCH)
+
+static void convert_ipv4_5tuple(struct ipv4_5tuple* key1,
+		union ipv4_5tuple_host* key2)
+{
+	key2->ip_dst = rte_cpu_to_be_32(key1->ip_dst);
+	key2->ip_src = rte_cpu_to_be_32(key1->ip_src);
+	key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
+	key2->port_src = rte_cpu_to_be_16(key1->port_src);
+	key2->proto = key1->proto;
+	key2->pad0 = 0;
+	key2->pad1 = 0;
+	return;
+}
+
+static void convert_ipv6_5tuple(struct ipv6_5tuple* key1,
+                union ipv6_5tuple_host* key2)
+{
+	uint32_t i;
+	for (i = 0; i < 16; i++)
+	{
+		key2->ip_dst[i] = key1->ip_dst[i];
+		key2->ip_src[i] = key1->ip_src[i];
+	}
+	key2->port_dst = rte_cpu_to_be_16(key1->port_dst);
+	key2->port_src = rte_cpu_to_be_16(key1->port_src);
+	key2->proto = key1->proto;
+	key2->pad0 = 0;
+	key2->pad1 = 0;
+	key2->reserve = 0;
+	return;
+}
+
+#define BYTE_VALUE_MAX 256
+#define ALL_32_BITS 0xffffffff
+#define BIT_8_TO_15 0x0000ff00
+static inline void
+populate_ipv4_few_flow_into_table(const struct rte_hash* h)
+{
+	uint32_t i;
+	int32_t ret;
+	uint32_t array_len = sizeof(ipv4_udp_replay_route_array)/sizeof(ipv4_udp_replay_route_array[0]);
+
+	mask0 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_8_TO_15);
+	for (i = 0; i < array_len; i++) {
+		struct ipv4_udp_replay_route  entry;
+		union ipv4_5tuple_host newkey;
+		entry = ipv4_udp_replay_route_array[i];
+		convert_ipv4_5tuple(&entry.key, &newkey);
+		ret = rte_hash_add_key (h,(void *) &newkey);
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
+				" to the udp_replay hash.\n", i);
+		}
+		ipv4_udp_replay_out_if[ret] = entry.if_out;
+	}
+	printf("Hash: Adding 0x%" PRIx32 " keys\n", array_len);
+}
+
+#define BIT_16_TO_23 0x00ff0000
+static inline void
+populate_ipv6_few_flow_into_table(const struct rte_hash* h)
+{
+	uint32_t i;
+	int32_t ret;
+	uint32_t array_len = sizeof(ipv6_udp_replay_route_array)/sizeof(ipv6_udp_replay_route_array[0]);
+
+	mask1 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_16_TO_23);
+	mask2 = _mm_set_epi32(0, 0, ALL_32_BITS, ALL_32_BITS);
+	for (i = 0; i < array_len; i++) {
+		struct ipv6_udp_replay_route entry;
+		union ipv6_5tuple_host newkey;
+		entry = ipv6_udp_replay_route_array[i];
+		convert_ipv6_5tuple(&entry.key, &newkey);
+		ret = rte_hash_add_key (h, (void *) &newkey);
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %" PRIu32
+				" to the udp_replay hash.\n", i);
+		}
+		ipv6_udp_replay_out_if[ret] = entry.if_out;
+	}
+	printf("Hash: Adding 0x%" PRIx32 "keys\n", array_len);
+}
+
+#define NUMBER_PORT_USED 4
+static inline void
+populate_ipv4_many_flow_into_table(const struct rte_hash* h,
+                unsigned int nr_flow)
+{
+	unsigned i;
+	mask0 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_8_TO_15);
+	for (i = 0; i < nr_flow; i++) {
+		struct ipv4_udp_replay_route entry;
+		union ipv4_5tuple_host newkey;
+		uint8_t a = (uint8_t) ((i/NUMBER_PORT_USED)%BYTE_VALUE_MAX);
+		uint8_t b = (uint8_t) (((i/NUMBER_PORT_USED)/BYTE_VALUE_MAX)%BYTE_VALUE_MAX);
+		uint8_t c = (uint8_t) ((i/NUMBER_PORT_USED)/(BYTE_VALUE_MAX*BYTE_VALUE_MAX));
+		/* Create the ipv4 exact match flow */
+		memset(&entry, 0, sizeof(entry));
+		switch (i & (NUMBER_PORT_USED -1)) {
+		case 0:
+			entry = ipv4_udp_replay_route_array[0];
+			entry.key.ip_dst = IPv4(101,c,b,a);
+			break;
+		case 1:
+			entry = ipv4_udp_replay_route_array[1];
+			entry.key.ip_dst = IPv4(201,c,b,a);
+			break;
+		case 2:
+			entry = ipv4_udp_replay_route_array[2];
+			entry.key.ip_dst = IPv4(111,c,b,a);
+			break;
+		case 3:
+			entry = ipv4_udp_replay_route_array[3];
+			entry.key.ip_dst = IPv4(211,c,b,a);
+			break;
+		};
+		convert_ipv4_5tuple(&entry.key, &newkey);
+		int32_t ret = rte_hash_add_key(h,(void *) &newkey);
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
+		}
+		ipv4_udp_replay_out_if[ret] = (uint8_t) entry.if_out;
+
+	}
+	printf("Hash: Adding 0x%x keys\n", nr_flow);
+}
+
+static inline void
+populate_ipv6_many_flow_into_table(const struct rte_hash* h,
+                unsigned int nr_flow)
+{
+	unsigned i;
+	mask1 = _mm_set_epi32(ALL_32_BITS, ALL_32_BITS, ALL_32_BITS, BIT_16_TO_23);
+	mask2 = _mm_set_epi32(0, 0, ALL_32_BITS, ALL_32_BITS);
+	for (i = 0; i < nr_flow; i++) {
+		struct ipv6_udp_replay_route entry;
+		union ipv6_5tuple_host newkey;
+		uint8_t a = (uint8_t) ((i/NUMBER_PORT_USED)%BYTE_VALUE_MAX);
+		uint8_t b = (uint8_t) (((i/NUMBER_PORT_USED)/BYTE_VALUE_MAX)%BYTE_VALUE_MAX);
+		uint8_t c = (uint8_t) ((i/NUMBER_PORT_USED)/(BYTE_VALUE_MAX*BYTE_VALUE_MAX));
+		/* Create the ipv6 exact match flow */
+		memset(&entry, 0, sizeof(entry));
+		switch (i & (NUMBER_PORT_USED - 1)) {
+		case 0: entry = ipv6_udp_replay_route_array[0]; break;
+		case 1: entry = ipv6_udp_replay_route_array[1]; break;
+		case 2: entry = ipv6_udp_replay_route_array[2]; break;
+		case 3: entry = ipv6_udp_replay_route_array[3]; break;
+		};
+		entry.key.ip_dst[13] = c;
+		entry.key.ip_dst[14] = b;
+		entry.key.ip_dst[15] = a;
+		convert_ipv6_5tuple(&entry.key, &newkey);
+		int32_t ret = rte_hash_add_key(h,(void *) &newkey);
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u\n", i);
+		}
+		ipv6_udp_replay_out_if[ret] = (uint8_t) entry.if_out;
+
+	}
+	printf("Hash: Adding 0x%x keys\n", nr_flow);
+}
+
+static void
+setup_hash(int socketid)
+{
+    struct rte_hash_parameters ipv4_udp_replay_hash_params = {
+        .name = NULL,
+        .entries = UDP_Replay_HASH_ENTRIES,
+        .key_len = sizeof(union ipv4_5tuple_host),
+        .hash_func = ipv4_hash_crc,
+        .hash_func_init_val = 0,
+    };
+
+    struct rte_hash_parameters ipv6_udp_replay_hash_params = {
+        .name = NULL,
+        .entries = UDP_Replay_HASH_ENTRIES,
+        .key_len = sizeof(union ipv6_5tuple_host),
+        .hash_func = ipv6_hash_crc,
+        .hash_func_init_val = 0,
+    };
+
+    char s[64];
+
+	/* create ipv4 hash */
+	snprintf(s, sizeof(s), "ipv4_udp_replay_hash_%d", socketid);
+	ipv4_udp_replay_hash_params.name = s;
+	ipv4_udp_replay_hash_params.socket_id = socketid;
+	ipv4_udp_replay_lookup_struct[socketid] = rte_hash_create(&ipv4_udp_replay_hash_params);
+	if (ipv4_udp_replay_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the udp_replay hash on "
+				"socket %d\n", socketid);
+
+	/* create ipv6 hash */
+	snprintf(s, sizeof(s), "ipv6_udp_replay_hash_%d", socketid);
+	ipv6_udp_replay_hash_params.name = s;
+	ipv6_udp_replay_hash_params.socket_id = socketid;
+	ipv6_udp_replay_lookup_struct[socketid] = rte_hash_create(&ipv6_udp_replay_hash_params);
+	if (ipv6_udp_replay_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the udp_replay hash on "
+				"socket %d\n", socketid);
+
+	if (hash_entry_number != HASH_ENTRY_NUMBER_DEFAULT) {
+		/* For testing hash matching with a large number of flows we
+		 * generate millions of IP 5-tuples with an incremented dst
+		 * address to initialize the hash table. */
+		if (ipv6 == 0) {
+			/* populate the ipv4 hash */
+			populate_ipv4_many_flow_into_table(
+				ipv4_udp_replay_lookup_struct[socketid], hash_entry_number);
+		} else {
+			/* populate the ipv6 hash */
+			populate_ipv6_many_flow_into_table(
+				ipv6_udp_replay_lookup_struct[socketid], hash_entry_number);
+		}
+	} else {
+		/* Use data in ipv4/ipv6 udp_replay lookup table directly to initialize the hash table */
+		if (ipv6 == 0) {
+			/* populate the ipv4 hash */
+			populate_ipv4_few_flow_into_table(ipv4_udp_replay_lookup_struct[socketid]);
+		} else {
+			/* populate the ipv6 hash */
+			populate_ipv6_few_flow_into_table(ipv6_udp_replay_lookup_struct[socketid]);
+		}
+	}
+}
+#endif
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+static void
+setup_lpm(int socketid)
+{
+	struct rte_lpm6_config config;
+	unsigned i;
+	int ret;
+	char s[64];
+
+	/* create the LPM table */
+	snprintf(s, sizeof(s), "IPV4_UDP_Replay_LPM_%d", socketid);
+	ipv4_udp_replay_lookup_struct[socketid] = rte_lpm_create(s, socketid,
+				IPV4_UDP_Replay_LPM_MAX_RULES, 0);
+	if (ipv4_udp_replay_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the udp_replay LPM table"
+				" on socket %d\n", socketid);
+
+	/* populate the LPM table */
+	for (i = 0; i < IPV4_UDP_Replay_NUM_ROUTES; i++) {
+
+		/* skip unused ports */
+		if ((1 << ipv4_udp_replay_route_array[i].if_out &
+				enabled_port_mask) == 0)
+			continue;
+
+		ret = rte_lpm_add(ipv4_udp_replay_lookup_struct[socketid],
+			ipv4_udp_replay_route_array[i].ip,
+			ipv4_udp_replay_route_array[i].depth,
+			ipv4_udp_replay_route_array[i].if_out);
+
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u to the "
+				"udp_replay LPM table on socket %d\n",
+				i, socketid);
+		}
+
+		printf("LPM: Adding route 0x%08x / %d (%d)\n",
+			(unsigned)ipv4_udp_replay_route_array[i].ip,
+			ipv4_udp_replay_route_array[i].depth,
+			ipv4_udp_replay_route_array[i].if_out);
+	}
+
+	/* create the LPM6 table */
+	snprintf(s, sizeof(s), "IPV6_UDP_Replay_LPM_%d", socketid);
+
+	config.max_rules = IPV6_UDP_Replay_LPM_MAX_RULES;
+	config.number_tbl8s = IPV6_UDP_Replay_LPM_NUMBER_TBL8S;
+	config.flags = 0;
+	ipv6_udp_replay_lookup_struct[socketid] = rte_lpm6_create(s, socketid,
+				&config);
+	if (ipv6_udp_replay_lookup_struct[socketid] == NULL)
+		rte_exit(EXIT_FAILURE, "Unable to create the udp_replay LPM table"
+				" on socket %d\n", socketid);
+
+	/* populate the LPM table */
+	for (i = 0; i < IPV6_UDP_Replay_NUM_ROUTES; i++) {
+
+		/* skip unused ports */
+		if ((1 << ipv6_udp_replay_route_array[i].if_out &
+				enabled_port_mask) == 0)
+			continue;
+
+		ret = rte_lpm6_add(ipv6_udp_replay_lookup_struct[socketid],
+			ipv6_udp_replay_route_array[i].ip,
+			ipv6_udp_replay_route_array[i].depth,
+			ipv6_udp_replay_route_array[i].if_out);
+
+		if (ret < 0) {
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u to the "
+				"udp_replay LPM table on socket %d\n",
+				i, socketid);
+		}
+
+		printf("LPM: Adding route %s / %d (%d)\n",
+			"IPV6",
+			ipv6_udp_replay_route_array[i].depth,
+			ipv6_udp_replay_route_array[i].if_out);
+	}
+}
+#endif
+
+static int
+init_mem(unsigned nb_mbuf)
+{
+	struct lcore_conf *qconf;
+	int socketid;
+	unsigned lcore_id;
+	char s[64];
+
+	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+		if (rte_lcore_is_enabled(lcore_id) == 0)
+			continue;
+
+		if (numa_on)
+			socketid = rte_lcore_to_socket_id(lcore_id);
+		else
+			socketid = 0;
+
+		if (socketid >= NB_SOCKETS) {
+			rte_exit(EXIT_FAILURE, "Socket %d of lcore %u is out of range %d\n",
+				socketid, lcore_id, NB_SOCKETS);
+		}
+		if (pktmbuf_pool[socketid] == NULL) {
+			snprintf(s, sizeof(s), "mbuf_pool_%d", socketid);
+			pktmbuf_pool[socketid] =
+				rte_pktmbuf_pool_create(s, nb_mbuf,
+					MEMPOOL_CACHE_SIZE, 0,
+					RTE_MBUF_DEFAULT_BUF_SIZE, socketid);
+			if (pktmbuf_pool[socketid] == NULL)
+				rte_exit(EXIT_FAILURE,
+						"Cannot init mbuf pool on socket %d\n", socketid);
+			else
+				printf("Allocated mbuf pool on socket %d\n", socketid);
+
+#if (APP_LOOKUP_METHOD == APP_LOOKUP_LPM)
+			setup_lpm(socketid);
+#else
+			setup_hash(socketid);
+#endif
+		}
+		qconf = &lcore_conf[lcore_id];
+		qconf->ipv4_lookup_struct = ipv4_udp_replay_lookup_struct[socketid];
+		qconf->ipv6_lookup_struct = ipv6_udp_replay_lookup_struct[socketid];
+	}
+	return 0;
+}
+
+/* Check the link status of all ports in up to 9s, and print them finally */
+static void
+check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
+{
+#define CHECK_INTERVAL 100 /* 100ms */
+#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
+	uint8_t portid, count, all_ports_up, print_flag = 0;
+	struct rte_eth_link link;
+
+	printf("\nChecking link status");
+	fflush(stdout);
+	for (count = 0; count <= MAX_CHECK_TIME; count++) {
+		all_ports_up = 1;
+		for (portid = 0; portid < port_num; portid++) {
+			if ((port_mask & (1 << portid)) == 0)
+				continue;
+			memset(&link, 0, sizeof(link));
+			rte_eth_link_get_nowait(portid, &link);
+			/* print link status if flag set */
+			if (print_flag == 1) {
+				if (link.link_status)
+					printf("Port %d Link Up - speed %u "
+						"Mbps - %s\n", (uint8_t)portid,
+						(unsigned)link.link_speed,
+				(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+					("full-duplex") : ("half-duplex\n"));
+				else
+					printf("Port %d Link Down\n",
+						(uint8_t)portid);
+				continue;
+			}
+			/* clear all_ports_up flag if any link down */
+			if (link.link_status == 0) {
+				all_ports_up = 0;
+				break;
+			}
+		}
+		/* after finally printing all link status, get out */
+		if (print_flag == 1)
+			break;
+
+		if (all_ports_up == 0) {
+			printf(".");
+			fflush(stdout);
+			rte_delay_ms(CHECK_INTERVAL);
+		}
+
+		/* set the print_flag if all ports up or timeout */
+		if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
+			print_flag = 1;
+			printf("done\n");
+		}
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	struct lcore_conf *qconf;
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_txconf *txconf;
+	int ret;
+	unsigned nb_ports;
+	uint16_t queueid;
+	unsigned lcore_id;
+	uint32_t n_tx_queue, nb_lcores;
+	uint8_t portid, nb_rx_queue, queue, socketid;
+        struct cmdline *cl;
+
+	/* init EAL */
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid EAL parameters\n");
+	argc -= ret;
+	argv += ret;
+	/* parse application arguments (after the EAL ones) */
+	ret = parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid UDP_Replay parameters\n");
+
+	if (check_lcore_params() < 0)
+		rte_exit(EXIT_FAILURE, "check_lcore_params failed\n");
+
+	ret = init_lcore_rx_queues();
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "init_lcore_rx_queues failed\n");
+
+	nb_ports = rte_eth_dev_count();
+	if (nb_ports > RTE_MAX_ETHPORTS)
+		nb_ports = RTE_MAX_ETHPORTS;
+
+	if (check_port_config(nb_ports) < 0)
+		rte_exit(EXIT_FAILURE, "check_port_config failed\n");
+
+	nb_lcores = rte_lcore_count();
+
+	/* initialize all ports */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((enabled_port_mask & (1 << portid)) == 0) {
+			printf("\nSkipping disabled port %d\n", portid);
+			continue;
+		}
+
+		/* init port */
+		printf("Initializing port %d ... ", portid );
+		fflush(stdout);
+
+		nb_rx_queue = get_port_n_rx_queues(portid);
+		n_tx_queue = nb_lcores;
+		if (n_tx_queue > MAX_TX_QUEUE_PER_PORT)
+			n_tx_queue = MAX_TX_QUEUE_PER_PORT;
+		printf("Creating queues: nb_rxq=%d nb_txq=%u... ",
+			nb_rx_queue, (unsigned)n_tx_queue );
+		ret = rte_eth_dev_configure(portid, nb_rx_queue,
+					(uint16_t)n_tx_queue, &port_conf);
+		if (ret < 0) {
+                        printf("Port configuration failed : port: %d... Try with hw-ip-checksum disabled\n", portid);  
+                        port_conf.rxmode.hw_ip_checksum = 0;
+			ret = rte_eth_dev_configure(portid, nb_rx_queue,
+					(uint16_t)n_tx_queue, &port_conf);
+			if (ret < 0)
+			     rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%d\n",
+				ret, portid);
+                }
+                /*Since its just swapping of MAC we dont have to fill our own src mac*/
+		rte_eth_macaddr_get(portid, &ports_eth_addr[portid]);
+		print_ethaddr(" Address:", &ports_eth_addr[portid]);
+
+		/* init memory */
+		ret = init_mem(NB_MBUF);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "init_mem failed\n");
+
+		/* init one TX queue per couple (lcore,port) */
+		queueid = 0;
+		for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+			if (rte_lcore_is_enabled(lcore_id) == 0)
+				continue;
+
+			if (numa_on)
+				socketid = (uint8_t)rte_lcore_to_socket_id(lcore_id);
+			else
+				socketid = 0;
+
+			printf("txq=%u,%d,%d ", lcore_id, queueid, socketid);
+			fflush(stdout);
+
+			rte_eth_dev_info_get(portid, &dev_info);
+			txconf = &dev_info.default_txconf;
+			if (port_conf.rxmode.jumbo_frame)
+				txconf->txq_flags = 0;
+			ret = rte_eth_tx_queue_setup(portid, queueid, nb_txd,
+						     socketid, txconf);
+			if (ret < 0)
+				rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup: err=%d, "
+					"port=%d\n", ret, portid);
+
+			qconf = &lcore_conf[lcore_id];
+			qconf->tx_queue_id[portid] = queueid;
+			queueid++;
+		}
+		printf("\n");
+	}
+
+	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
+		if (rte_lcore_is_enabled(lcore_id) == 0)
+			continue;
+		qconf = &lcore_conf[lcore_id];
+		printf("\nInitializing rx queues on lcore %u ... ", lcore_id );
+		fflush(stdout);
+		/* init RX queues */
+		for(queue = 0; queue < qconf->n_rx_queue; ++queue) {
+			portid = qconf->rx_queue_list[queue].port_id;
+			queueid = qconf->rx_queue_list[queue].queue_id;
+
+			if (numa_on)
+				socketid = (uint8_t)rte_lcore_to_socket_id(lcore_id);
+			else
+				socketid = 0;
+
+			printf("rxq=%d,%d,%d ", portid, queueid, socketid);
+			fflush(stdout);
+
+			ret = rte_eth_rx_queue_setup(portid, queueid, nb_rxd,
+					socketid,
+					NULL,
+					pktmbuf_pool[socketid]);
+			if (ret < 0)
+				rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup: err=%d,"
+						"port=%d\n", ret, portid);
+		}
+	}
+
+	printf("\n");
+
+	/* start ports */
+	for (portid = 0; portid < nb_ports; portid++) {
+		if ((enabled_port_mask & (1 << portid)) == 0) {
+			continue;
+		}
+		/* Start device */
+		ret = rte_eth_dev_start(portid);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_dev_start: err=%d, port=%d\n",
+				ret, portid);
+
+		/*
+		 * If enabled, put device in promiscuous mode.
+		 * This allows IO forwarding mode to forward packets
+		 * to itself through 2 cross-connected  ports of the
+		 * target machine.
+		 */
+		if (promiscuous_on)
+			rte_eth_promiscuous_enable(portid);
+	}
+
+	check_all_ports_link_status((uint8_t)nb_ports, enabled_port_mask);
+
+	/* launch per-lcore init on every lcore */
+	rte_eal_mp_remote_launch(main_loop, NULL, CALL_MASTER);
+	cl = cmdline_stdin_new(main_ctx, "Replay>");
+	if (cl == NULL)
+		rte_panic("Cannot create cmdline instance\n");
+	cmdline_interact(cl);
+	cmdline_stdin_exit(cl);
+	rte_exit(0, "Bye!\n");
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		if (rte_eal_wait_lcore(lcore_id) < 0)
+			return -1;
+	}
+
+	return 0;
+}
+/**********************************************************/
+
+struct cmd_obj_clear_result {
+	cmdline_fixed_string_t clear;
+	cmdline_fixed_string_t udp_replay;
+	cmdline_fixed_string_t stats;
+};
+
+static void cmd_clear_udp_replay_stats_parsed(
+        __rte_unused void *parsed_result,
+        __rte_unused struct cmdline *cl,
+   __attribute__((unused)) void *data)
+{
+
+	clear_stats();
+}
+
+cmdline_parse_token_string_t cmd_clear_udp_replay_stats_udp_replay_string =
+	TOKEN_STRING_INITIALIZER(struct cmd_obj_clear_result, udp_replay, "UDP_Replay");
+cmdline_parse_token_string_t cmd_clear_udp_replay_stats_clear_string =
+	TOKEN_STRING_INITIALIZER(struct cmd_obj_clear_result, clear, "clear");
+cmdline_parse_token_string_t cmd_clear_udp_replay_stats_stats_string =
+	TOKEN_STRING_INITIALIZER(struct cmd_obj_clear_result, stats, "stats");
+
+cmdline_parse_inst_t cmd_clear_udp_replay_stats = {
+	.f = cmd_clear_udp_replay_stats_parsed,  /* function to call */
+	.data = NULL,      /* 2nd arg of func */
+	.help_str = "clears UDP_Replay stats for rx/tx",
+	.tokens = {        /* token list, NULL terminated */
+		(void *)&cmd_clear_udp_replay_stats_udp_replay_string,
+		(void *)&cmd_clear_udp_replay_stats_clear_string,
+		(void *)&cmd_clear_udp_replay_stats_stats_string,
+		NULL,
+	},
+};
+/**********************************************************/
+struct cmd_obj_add_result {
+	cmdline_fixed_string_t action;
+	cmdline_fixed_string_t name;
+};
+
+static void cmd_udp_replay_stats_parsed(
+        __rte_unused void *parsed_result,
+        __rte_unused struct cmdline *cl,
+   __attribute__((unused)) void *data)
+{
+	print_stats();
+}
+
+cmdline_parse_token_string_t cmd_udp_replay_stats_udp_replay_string =
+	TOKEN_STRING_INITIALIZER(struct cmd_obj_add_result, action, "UDP_Replay");
+cmdline_parse_token_string_t cmd_udp_replay_stats_stats_string =
+	TOKEN_STRING_INITIALIZER(struct cmd_obj_add_result, name, "stats");
+
+cmdline_parse_inst_t cmd_udp_replay_stats = {
+	.f = cmd_udp_replay_stats_parsed,  /* function to call */
+	.data = NULL,      /* 2nd arg of func */
+	.help_str = "UDP_Replay stats for rx/tx",
+	.tokens = {        /* token list, NULL terminated */
+		(void *)&cmd_udp_replay_stats_udp_replay_string,
+		(void *)&cmd_udp_replay_stats_stats_string,
+		NULL,
+	},
+};
+/* quit*/
+struct cmd_quit_result {
+	cmdline_fixed_string_t quit;
+};
+
+static void
+cmd_quit_parsed(
+	__rte_unused void *parsed_result,
+	struct cmdline *cl,
+	__rte_unused void *data)
+{
+	cmdline_quit(cl);
+}
+
+static cmdline_parse_token_string_t cmd_quit_quit =
+	TOKEN_STRING_INITIALIZER(struct cmd_quit_result, quit, "quit");
+
+static cmdline_parse_inst_t cmd_quit = {
+	.f = cmd_quit_parsed,
+	.data = NULL,
+	.help_str = "Quit",
+	.tokens = {
+		  (void *) &cmd_quit_quit,
+		  NULL,
+	},
+};
+
+/**********************************************************/
+/****** CONTEXT (list of instruction) */
+cmdline_parse_ctx_t main_ctx[] = {
+	(cmdline_parse_inst_t *)&cmd_udp_replay_stats,
+	(cmdline_parse_inst_t *)&cmd_clear_udp_replay_stats,
+	(cmdline_parse_inst_t *)&cmd_quit,
+	NULL,
+};
diff --git a/VNFs/UDP_Replay/parse_obj_list.c b/VNFs/UDP_Replay/parse_obj_list.c
new file mode 100644
index 00000000..a8100d19
--- /dev/null
+++ b/VNFs/UDP_Replay/parse_obj_list.c
@@ -0,0 +1,149 @@
+/*
+// Copyright (c) 2016-2017 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+/*
+ * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the University of California, Berkeley nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+#include <netinet/in.h>
+
+#include <cmdline_parse.h>
+#include <cmdline_parse_ipaddr.h>
+
+#include <rte_string_fns.h>
+
+#include "parse_obj_list.h"
+
+/* This file is an example of extension of libcmdline. It provides an
+ * example of objects stored in a list. */
+
+struct cmdline_token_ops token_obj_list_ops = {
+	.parse = parse_obj_list,
+	.complete_get_nb = complete_get_nb_obj_list,
+	.complete_get_elt = complete_get_elt_obj_list,
+	.get_help = get_help_obj_list,
+};
+
+int
+parse_obj_list(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
+	unsigned ressize)
+{
+	struct token_obj_list *tk2 = (struct token_obj_list *)tk;
+	struct token_obj_list_data *tkd = &tk2->obj_list_data;
+	struct object *o;
+	unsigned int token_len = 0;
+
+	if (*buf == 0)
+		return -1;
+
+	if (res && ressize < sizeof(struct object *))
+		return -1;
+
+	while(!cmdline_isendoftoken(buf[token_len]))
+		token_len++;
+
+	SLIST_FOREACH(o, tkd->list, next) {
+		if (token_len != strnlen(o->name, OBJ_NAME_LEN_MAX))
+			continue;
+		if (strncmp(buf, o->name, token_len))
+			continue;
+		break;
+	}
+	if (!o) /* not found */
+		return -1;
+
+	/* store the address of object in structure */
+	if (res)
+		*(struct object **)res = o;
+
+	return token_len;
+}
+
+int complete_get_nb_obj_list(cmdline_parse_token_hdr_t *tk)
+{
+	struct token_obj_list *tk2 = (struct token_obj_list *)tk;
+	struct token_obj_list_data *tkd = &tk2->obj_list_data;
+	struct object *o;
+	int ret = 0;
+
+	SLIST_FOREACH(o, tkd->list, next) {
+		ret ++;
+	}
+	return ret;
+}
+
+int complete_get_elt_obj_list(cmdline_parse_token_hdr_t *tk,
+			      int idx, char *dstbuf, unsigned int size)
+{
+	struct token_obj_list *tk2 = (struct token_obj_list *)tk;
+	struct token_obj_list_data *tkd = &tk2->obj_list_data;
+	struct object *o;
+	int i = 0;
+	unsigned len;
+
+	SLIST_FOREACH(o, tkd->list, next) {
+		if (i++ == idx)
+			break;
+	}
+	if (!o)
+		return -1;
+
+	len = strnlen(o->name, OBJ_NAME_LEN_MAX);
+	if ((len + 1) > size)
+		return -1;
+
+	if (dstbuf)
+		snprintf(dstbuf, size, "%s", o->name);
+
+	return 0;
+}
+
+
+int get_help_obj_list(__attribute__((unused)) cmdline_parse_token_hdr_t *tk,
+		      char *dstbuf, unsigned int size)
+{
+	snprintf(dstbuf, size, "Obj-List");
+	return 0;
+}
diff --git a/VNFs/UDP_Replay/parse_obj_list.h b/VNFs/UDP_Replay/parse_obj_list.h
new file mode 100644
index 00000000..6b492e0f
--- /dev/null
+++ b/VNFs/UDP_Replay/parse_obj_list.h
@@ -0,0 +1,95 @@
+/*
+// Copyright (c) 2016-2017 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+/*
+ * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the University of California, Berkeley nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _PARSE_OBJ_LIST_H_
+#define _PARSE_OBJ_LIST_H_
+
+/* This file is an example of extension of libcmdline. It provides an
+ * example of objects stored in a list. */
+
+#include <sys/queue.h>
+#include <cmdline_parse.h>
+
+#define OBJ_NAME_LEN_MAX 64
+
+struct object {
+	SLIST_ENTRY(object) next;
+	char name[OBJ_NAME_LEN_MAX];
+	cmdline_ipaddr_t ip;
+};
+
+/* define struct object_list */
+SLIST_HEAD(object_list, object);
+
+/* data is a pointer to a list */
+struct token_obj_list_data {
+	struct object_list *list;
+};
+
+struct token_obj_list {
+	struct cmdline_token_hdr hdr;
+	struct token_obj_list_data obj_list_data;
+};
+typedef struct token_obj_list parse_token_obj_list_t;
+
+extern struct cmdline_token_ops token_obj_list_ops;
+
+int parse_obj_list(cmdline_parse_token_hdr_t *tk, const char *srcbuf, void *res,
+	unsigned ressize);
+int complete_get_nb_obj_list(cmdline_parse_token_hdr_t *tk);
+int complete_get_elt_obj_list(cmdline_parse_token_hdr_t *tk, int idx,
+			      char *dstbuf, unsigned int size);
+int get_help_obj_list(cmdline_parse_token_hdr_t *tk, char *dstbuf, unsigned int size);
+
+#define TOKEN_OBJ_LIST_INITIALIZER(structure, field, obj_list_ptr)  \
+{								    \
+	.hdr = {						    \
+		.ops = &token_obj_list_ops,			    \
+		.offset = offsetof(structure, field),		    \
+	},							    \
+		.obj_list_data = {				    \
+		.list = obj_list_ptr,				    \
+	},							    \
+}
+
+#endif /* _PARSE_OBJ_LIST_H_ */
diff --git a/tools/vnf_build.sh b/tools/vnf_build.sh
index 342ac119..f6afb879 100755
--- a/tools/vnf_build.sh
+++ b/tools/vnf_build.sh
@@ -233,7 +233,7 @@ step_3()
 {
         TITLE="Build VNFs"
         CONFIG_NUM=1
-				TEXT[1]="Build all VNFs (vACL, vCGNAPT, vFW)"
+				TEXT[1]="Build all VNFs (vACL, vCGNAPT, vFW, UDP_Replay)"
         FUNC[1]="build_vnfs"
 }