[dpdk-dev] [PATCH] l2fwd:mac learning

[Rafat Jahan <rafat.jahan@tcs.com>]

Added MAC learning to reduce load at l2

Signed-off-by: Rafat Jahan <rafat.jahan@tcs.com>
---
 examples/l2fwd-mac/Makefile |   50 ++
 examples/l2fwd-mac/main.c   | 1325 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 1375 insertions(+)
 create mode 100644 examples/l2fwd-mac/Makefile
 create mode 100644 examples/l2fwd-mac/main.c

diff --git a/examples/l2fwd-mac/Makefile b/examples/l2fwd-mac/Makefile
new file mode 100644
index 0000000..6ab93f4
--- /dev/null
+++ b/examples/l2fwd-mac/Makefile
@@ -0,0 +1,50 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+#   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 Intel Corporation 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+#   OWNER OR 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.
+
+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 = l2fwd-mac
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/examples/l2fwd-mac/main.c b/examples/l2fwd-mac/main.c
new file mode 100644
index 0000000..33d6a6e
--- /dev/null
+++ b/examples/l2fwd-mac/main.c
@@ -0,0 +1,1325 @@
+/*-thread created and in which two seperate threads for updation and checking are created infinately
+
+	final working code
+
+
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   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 Intel Corporation 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 COPYRIGHT HOLDERS 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 COPYRIGHT
+ *   OWNER OR 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 <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <netinet/in.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include <rte_common.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_arp.h>
+
+#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
+
+#define NB_MBUF   8192
+
+#define MAX_PKT_BURST 32
+#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
+ 
+#define default_aging_time 30
+pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
+/*
+ * Work-around of a compilation error with ICC on invocations of the
+ * rte_be_to_cpu_16() function.
+ */
+#ifdef __GCC__
+#define RTE_BE_TO_CPU_16(be_16_v)  rte_be_to_cpu_16((be_16_v))
+#define RTE_CPU_TO_BE_16(cpu_16_v) rte_cpu_to_be_16((cpu_16_v))
+#else
+#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
+#define RTE_BE_TO_CPU_16(be_16_v)  (be_16_v)
+#define RTE_CPU_TO_BE_16(cpu_16_v) (cpu_16_v)
+#else
+#define RTE_BE_TO_CPU_16(be_16_v) \
+        (uint16_t) ((((be_16_v) & 0xFF) << 8) | ((be_16_v) >> 8))
+#define RTE_CPU_TO_BE_16(cpu_16_v) \
+        (uint16_t) ((((cpu_16_v) & 0xFF) << 8) | ((cpu_16_v) >> 8))
+#endif
+#endif /* __GCC__ */
+
+/*
+ * 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;
+
+/* ethernet addresses of ports */
+static struct ether_addr l2fwd_ports_eth_addr[RTE_MAX_ETHPORTS];
+
+/* mask of enabled ports */
+static uint32_t l2fwd_enabled_port_mask = 0;
+static int64_t l2fwd_user_defined_dst_port = 0;
+static int16_t l2fwd_mac_learning_enabled = 0;
+uint64_t total_duplicate_packets_dropped = 0;
+
+/* list of enabled ports */
+static uint32_t l2fwd_dst_ports[RTE_MAX_ETHPORTS];
+
+static unsigned int l2fwd_rx_queue_per_lcore = 1;
+
+void add_mac_entry(struct ether_hdr *eth,unsigned port);
+static void l2fwd_mac_ports_update(struct ether_hdr *eth,unsigned rxport);
+static void l2fwd_mac_display(void);
+static void l2fwd_show_mac_entry(void);
+void source_mac_table(struct ether_hdr *eth,unsigned port);
+void add_src_mac_entry(struct ether_hdr *eth,unsigned port);
+void update_aging(struct ether_hdr *eth);
+void *thread1(void);
+void *thread2(void);
+void *threadInit(void);
+
+
+struct node
+{
+        unsigned port;
+        struct ether_addr s_addr; /**< Source address. */
+	struct ether_addr d_addr; /**< Destination address. */
+	time_t starttime;
+        struct node *next;
+}*head = NULL;
+
+struct mac_list
+{
+        unsigned port;
+        struct ether_addr s_addr;
+	time_t rx_time;
+	char *buff;
+	int aging_time;
+        struct mac_list *next;
+}*start = NULL;
+
+
+struct mbuf_table {
+	unsigned len;
+	struct rte_mbuf *m_table[MAX_PKT_BURST];
+};
+
+void update_node(struct mac_list *ptr);
+#define MAX_RX_QUEUE_PER_LCORE 16
+#define MAX_TX_QUEUE_PER_PORT 16
+struct lcore_queue_conf {
+	unsigned n_rx_port;
+	unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
+	struct mbuf_table tx_mbufs[RTE_MAX_ETHPORTS];
+
+} __rte_cache_aligned;
+struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
+
+static const struct rte_eth_conf port_conf = {
+	.rxmode = {
+		.split_hdr_size = 0,
+		.header_split   = 0, /**< Header Split disabled */
+		.hw_ip_checksum = 0, /**< IP checksum offload disabled */
+		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
+		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
+		.hw_strip_crc   = 0, /**< CRC stripped by hardware */
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+};
+
+struct rte_mempool * l2fwd_pktmbuf_pool = NULL;
+
+/* Per-port statistics struct */
+struct l2fwd_port_statistics {
+	uint64_t tx;
+	uint64_t rx;
+	uint64_t dropped;
+} __rte_cache_aligned;
+struct l2fwd_port_statistics port_statistics[RTE_MAX_ETHPORTS];
+
+/* A tsc-based timer responsible for triggering statistics printout */
+#define TIMER_MILLISECOND 2000000ULL /* around 1ms at 2 Ghz */
+#define MAX_TIMER_PERIOD 86400 /* 1 day max */
+static int64_t timer_period = 10 * TIMER_MILLISECOND * 1000; /* default period is 10 seconds */
+
+static inline void
+print_ether_addr(const char *what, struct ether_addr *eth_addr)
+{
+        char buf[ETHER_ADDR_FMT_SIZE];
+        ether_format_addr(buf, ETHER_ADDR_FMT_SIZE, eth_addr);
+        printf("%s%s", what, buf);
+}
+
+static void
+ipv4_addr_to_dot(uint32_t be_ipv4_addr, char *buf)
+{
+        uint32_t ipv4_addr;
+
+        ipv4_addr = rte_be_to_cpu_32(be_ipv4_addr);
+        sprintf(buf, "%d.%d.%d.%d", (ipv4_addr >> 24) & 0xFF,
+                (ipv4_addr >> 16) & 0xFF, (ipv4_addr >> 8) & 0xFF,
+                ipv4_addr & 0xFF);
+}
+
+static void
+ipv4_addr_dump(const char *what, uint32_t be_ipv4_addr)
+{
+        char buf[16];
+
+        ipv4_addr_to_dot(be_ipv4_addr, buf);
+        if (what)
+                printf("%s", what);
+        printf("%s", buf);
+}
+
+void add_mac_entry(struct ether_hdr *eth,unsigned port)
+{
+	struct node *new = NULL;
+	new = (struct node*)malloc(sizeof(struct node));
+	if(new == NULL)
+	{
+		printf("Memory not allocated for MAC database");
+	}
+
+	source_mac_table(eth,port);
+
+	new->port = port;
+	new->starttime = time(NULL);
+	ether_addr_copy(&eth->s_addr, &new->s_addr);
+	ether_addr_copy(&eth->d_addr, &new->d_addr);
+	if(head == NULL)
+	{
+		head = new;
+		head->next = NULL;
+		
+	}
+	else
+	{
+		new->next = head;
+		head = new;
+		
+	}
+}
+
+void source_mac_table(struct ether_hdr *eth,unsigned port)
+{
+
+        struct mac_list *ptr = NULL;
+        ptr = start;
+        if(start == NULL)
+        {
+                printf("Adding entry to the table\n");
+                add_src_mac_entry(eth,port);
+        }
+        else
+        {
+                while(ptr != NULL)
+                {
+                        if (memcmp(&eth->s_addr, &ptr->s_addr, ETHER_ADDR_LEN) == 0)
+                        {
+							
+     				ptr->rx_time=time(NULL);
+				ptr->aging_time=default_aging_time;
+                                if(ptr->port != port )
+                                {
+                                        ptr->port = port;
+        	                           break;
+	                         }
+                                else
+                                        break; // received from same mac
+                        }
+                        ptr = ptr->next;
+                }
+                if(ptr == NULL)
+                {
+                        /*If the mac entry is not found in the table, then add the entry 
+                        to the mac table */
+                        printf("Adding MAC entry to table\n");
+                        add_src_mac_entry(eth,port);
+                }
+
+        }
+}
+
+void add_src_mac_entry(struct ether_hdr *eth,unsigned port)
+{
+        struct mac_list *new = NULL;
+        new = (struct mac_list*)malloc(sizeof(struct mac_list));
+        if(new == NULL)
+        {
+                printf("Memory not allocated for MAC database");
+        }
+        new->port = port;
+        ether_addr_copy(&eth->s_addr, &new->s_addr);
+	new->rx_time=time(NULL);
+	new->aging_time=default_aging_time;
+	if(start == NULL)
+        {
+                start = new;
+                start->next = NULL;
+        }
+        else
+        {
+		new->next=start;
+		start=new;               
+        }
+
+}
+
+/* Print out statistics on packets dropped */
+static void
+print_stats(void)
+{
+	uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
+	unsigned portid;
+
+	total_packets_dropped = 0;
+	total_packets_tx = 0;
+	total_packets_rx = 0;
+
+	const char clr[] = { 27, '[', '2', 'J', '\0' };
+	const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
+
+		/* Clear screen and move to top left */
+	printf("%s%s", clr, topLeft);
+
+	printf("\nPort statistics ====================================");
+
+	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+		/* skip disabled ports */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+		printf("\nStatistics for port %u ------------------------------"
+			   "\nPackets sent: %24"PRIu64
+			   "\nPackets received: %20"PRIu64
+			   "\nPackets dropped: %21"PRIu64,
+			   portid,
+			   port_statistics[portid].tx,
+			   port_statistics[portid].rx,
+			   port_statistics[portid].dropped);
+
+		total_packets_dropped += port_statistics[portid].dropped;
+		total_packets_tx += port_statistics[portid].tx;
+		total_packets_rx += port_statistics[portid].rx;
+	}
+	printf("\nAggregate statistics ==============================="
+		   "\nTotal packets sent: %18"PRIu64
+		   "\nTotal packets received: %14"PRIu64
+		   "\nTotal packets dropped: %15"PRIu64,
+		   total_packets_tx,
+		   total_packets_rx,
+		   total_packets_dropped);
+	printf("\nTotal duplicate packets dropped: %5"PRIu64,
+		   total_duplicate_packets_dropped);
+	printf("\n====================================================\n");
+}
+
+
+/* Send the burst of packets on an output interface */
+static int
+l2fwd_send_burst(struct lcore_queue_conf *qconf, unsigned n, uint8_t port)
+{
+	struct rte_mbuf **m_table;
+	unsigned ret;
+	unsigned queueid =0;
+
+	m_table = (struct rte_mbuf **)qconf->tx_mbufs[port].m_table;
+
+	ret = rte_eth_tx_burst(port, (uint16_t) queueid, m_table, (uint16_t) n);
+	port_statistics[port].tx += ret;
+	if (unlikely(ret < n)) {
+		port_statistics[port].dropped += (n - ret);
+		do {
+			rte_pktmbuf_free(m_table[ret]);
+		} while (++ret < n);
+	}
+
+	return 0;
+}
+
+/* Enqueue packets for TX and prepare them to be sent */
+static int
+l2fwd_send_packet(struct rte_mbuf *m, uint8_t port)
+{
+	unsigned lcore_id, len;
+	struct lcore_queue_conf *qconf;
+
+	lcore_id = rte_lcore_id();
+
+	qconf = &lcore_queue_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)) {
+		l2fwd_send_burst(qconf, MAX_PKT_BURST, port);
+		len = 0;
+	}
+
+	qconf->tx_mbufs[port].len = len;
+	return 0;
+}
+static void l2fwd_mac_display(void)
+{
+	struct node *node = NULL;
+	printf("\n==============DEBUGGING MAC TABLE=================\n");
+        printf("        SMAC			DMAC			PORT \n");
+        node = head;
+        while(node != NULL)
+        {
+        	print_ether_addr("", &node->s_addr);
+                print_ether_addr("	",&node->d_addr);                
+		printf("		%d\n",node->port);
+		node = node->next;
+        }
+        printf("========================================\n");
+}
+static void l2fwd_show_mac_entry(void)
+{
+        struct mac_list *node = NULL;
+        printf("\n==============MAC TABLE=================\n");
+        printf("        MAC                     PORT\taging time\n");
+        node = start;
+        while(node != NULL)
+        {
+                print_ether_addr("", &node->s_addr);
+                printf("                %d\t",node->port);
+        	printf("%d\n",node->aging_time);
+		
+	        node = node->next;
+        }
+        printf("========================================\n");
+}
+static void l2fwd_mac_ports_update(struct ether_hdr *eth,unsigned rxport)
+{
+	struct node *ptr = NULL;
+	struct mac_list *ptr1 = NULL;
+	
+        ptr = head;
+        while(ptr != NULL)
+        {
+		if (memcmp(&eth->s_addr, &ptr->s_addr, ETHER_ADDR_LEN) == 0)
+		{
+			ptr->port = rxport;
+		}
+                ptr = ptr->next;
+        }
+	
+	ptr1 = start;
+        while(ptr1 != NULL)
+        {
+		if (memcmp(&eth->s_addr, &ptr1->s_addr, ETHER_ADDR_LEN) == 0)
+		{
+			ptr1->port = rxport;
+			ptr1->rx_time=time(NULL);
+			ptr1->aging_time=default_aging_time;
+		}
+                ptr1 = ptr1->next;
+        }
+	
+}
+void update_aging(struct ether_hdr *eth)
+{
+	struct mac_list *ptr1=NULL;
+	ptr1 = start;
+        while(ptr1 != NULL)
+        {
+		if (memcmp(&eth->s_addr, &ptr1->s_addr, ETHER_ADDR_LEN) == 0)
+		{
+			ptr1->rx_time=time(NULL);
+			ptr1->aging_time=default_aging_time;
+		}
+                ptr1 = ptr1->next;
+        }
+}
+static void
+l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
+{
+	struct ether_hdr *eth;
+	void *tmp;
+	unsigned dst_port;
+	int currenttime,difference,timeout = 8;
+	//int err;
+	//pthread_t t1,t2;
+	dst_port = l2fwd_dst_ports[portid];
+        printf("---------- Forwarding Path ----------\n");
+        printf("Default forwarding dst port : %d\n",dst_port);
+	
+	eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
+	
+	if(l2fwd_user_defined_dst_port > 0)
+	{
+		dst_port = l2fwd_user_defined_dst_port;
+        	printf("User defined dst Port       : %d\n",dst_port);
+		printf("----------------------------------------\n");
+		printf("Forwarding path has been modified from default to user defined\n");
+	}
+	else if(l2fwd_mac_learning_enabled)
+	{
+        	//l2fwd_mac_display();
+		//l2fwd_show_mac_entry();
+		//pthread_mutex_lock( &mutex1 );
+		struct node *ptr = NULL;
+		struct mac_list *temp = NULL;
+		ptr = head;
+		if(head == NULL)
+		{
+			printf("No MAC address exist in table , adding entry to the table\n");
+			add_mac_entry(eth,portid);
+		}
+		else
+		{
+			/* condition to check and overwrite the 'port' if the same mac address 
+			   was already received from another 'port' earlier*/
+			while(ptr != NULL)
+			{
+				if ((memcmp(&eth->s_addr, &ptr->s_addr, ETHER_ADDR_LEN) == 0) &&
+					 (memcmp(&eth->d_addr, &ptr->d_addr, ETHER_ADDR_LEN) == 0))
+				{
+				//	printf("----->same SMAC DMAC\n");
+					if(portid != ptr->port)
+					{
+						printf("port id is different %d\n",portid);
+						currenttime = time(NULL);
+						difference = currenttime - (ptr->starttime);
+						if(difference > timeout)
+						{
+							printf("----->difference %d\n",difference);
+							ptr->port = portid;
+							ptr->starttime = time(NULL);
+							l2fwd_mac_ports_update(eth,portid);
+						//	add_mac_entry(eth,portid);
+							break;
+						} else {
+							printf("Detected duplication,packet dropped \n");
+							//duplicate packet
+							total_duplicate_packets_dropped++;
+							//need to check whether break is needed
+						//	return;
+						}
+					}
+
+					ptr->starttime = time(NULL);
+					update_aging(eth);
+				//	printf("---->received from same mac diff %d\n",difference);
+					break;
+				}
+				ptr = ptr->next;
+			}
+			if(ptr == NULL)
+			{
+				/*If the mac entry is not found in the table, then add the entry 
+				  to the mac table */
+				printf("Adding MAC entry to table\n");
+				add_mac_entry(eth,portid);
+				//l2fwd_mac_ports_update(eth,portid);
+			}
+		}
+	
+
+		/* lookup to get the dst port if the mac entry is already present in the table*/
+		temp = start;
+		while(temp != NULL)
+		{
+			if (memcmp(&eth->d_addr, &temp->s_addr, ETHER_ADDR_LEN) == 0)
+			{
+				dst_port = temp->port;
+				printf("\n");
+        			printf("dst port from table : %d\n",dst_port);
+				break;
+			}
+			temp = temp->next;
+		}	
+		/*If the dst mac is not available,then forward the packet in dumping port*/
+		if(temp == NULL)
+		{
+			dst_port = 9;
+        		printf("Dumping port : %d\n",dst_port);
+		}
+	
+	}
+	else 
+	{
+//========================================================
+		/* 02:00:00:00:00:xx */
+		tmp = &eth->d_addr.addr_bytes[0];
+		*((uint64_t *)tmp) = 0xffffffffffff ;
+		//*((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);
+	
+		/* src addr */
+		ether_addr_copy(&l2fwd_ports_eth_addr[dst_port], &eth->s_addr);
+	}
+
+	printf("========================================\n");
+       	l2fwd_mac_display();
+	l2fwd_show_mac_entry();
+	//pthread_mutex_unlock( &mutex1 );
+	l2fwd_send_packet(m, (uint8_t) dst_port);
+}
+
+/* main processing loop */
+static void
+l2fwd_main_loop(void)
+{
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct rte_mbuf *m;
+	unsigned lcore_id;
+	uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
+	unsigned i, j, portid, nb_rx;
+	struct lcore_queue_conf *qconf;
+	const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
+        struct ether_hdr *eth_hdr;
+        uint16_t eth_type;
+        struct ipv4_hdr *ip_h;
+        int l2_len;
+        struct arp_hdr  *arp_h;
+        uint32_t sip_addr,tip_addr;
+
+	prev_tsc = 0;
+	timer_tsc = 0;
+
+	lcore_id = rte_lcore_id();
+	qconf = &lcore_queue_conf[lcore_id];
+
+	if (qconf->n_rx_port == 0) {
+		RTE_LOG(INFO, L2FWD, "lcore %u has nothing to do\n", lcore_id);
+		return;
+	}
+
+	RTE_LOG(INFO, L2FWD, "entering main loop on lcore %u\n", lcore_id);
+
+	for (i = 0; i < qconf->n_rx_port; i++) {
+
+		portid = qconf->rx_port_list[i];
+		RTE_LOG(INFO, L2FWD, " -- lcoreid=%u portid=%u\n", lcore_id,
+			portid);
+	}
+
+	while (1) {
+
+		cur_tsc = rte_rdtsc();
+
+		/*
+		 * TX burst queue drain
+		 */
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > drain_tsc)) {
+
+			for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
+				if (qconf->tx_mbufs[portid].len == 0)
+					continue;
+				l2fwd_send_burst(&lcore_queue_conf[lcore_id],
+						 qconf->tx_mbufs[portid].len,
+						 (uint8_t) portid);
+				qconf->tx_mbufs[portid].len = 0;
+			}
+
+			/* if timer is enabled */
+			if (timer_period > 0) {
+
+				/* advance the timer */
+				timer_tsc += diff_tsc;
+
+				/* if timer has reached its timeout */
+				if (unlikely(timer_tsc >= (uint64_t) timer_period)) {
+
+					/* do this only on master core */
+					if (lcore_id == rte_get_master_lcore()) {
+						print_stats();
+						/* reset the timer */
+						timer_tsc = 0;
+					}
+				}
+			}
+
+			prev_tsc = cur_tsc;
+		}
+
+		/*
+		 * Read packet from RX queues
+		 */
+		for (i = 0; i < qconf->n_rx_port; i++) {
+
+			portid = qconf->rx_port_list[i];
+			nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
+						 pkts_burst, MAX_PKT_BURST);
+
+			if(nb_rx == 0)
+				continue;
+			port_statistics[portid].rx += nb_rx;
+
+			for (j = 0; j < nb_rx; j++) {
+				m = pkts_burst[j];
+				rte_prefetch0(rte_pktmbuf_mtod(m, void *));
+
+                                eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+                                eth_type = RTE_BE_TO_CPU_16(eth_hdr->ether_type);
+                                l2_len = sizeof(struct ether_hdr);
+                			
+				//if (eth_type != ETHER_TYPE_IPv4) {
+                        	//	rte_pktmbuf_free(m);
+                        	//	continue;
+                		//}
+
+                                printf("========================================\n");
+                                printf("Packet received on port :%d\n",portid);
+                                printf("------------ L2 Details------------\n");
+                                print_ether_addr("   Source MAC         : ", &eth_hdr->s_addr);
+                                print_ether_addr("\n   Destination MAC    : ", &eth_hdr->d_addr);
+                                printf("\n   Port               : %d"
+                                	"\n   Ethernet Type      : 0x%04x"
+					"\n   Length             : %u "
+					"\n   Nb_segs            : %d",
+                                        portid,
+					eth_type,
+					(unsigned) m->pkt_len,
+					(int)m->nb_segs);
+                                printf("\n");
+
+                                if (eth_type == ETHER_TYPE_ARP)
+				{
+                                        arp_h = (struct arp_hdr *) ((char *)eth_hdr + l2_len);
+                                        sip_addr = arp_h->arp_data.arp_sip;
+                                        tip_addr = arp_h->arp_data.arp_tip;
+				} else
+				{
+                			if (eth_type != ETHER_TYPE_IPv4) {
+                        			rte_pktmbuf_free(m);
+                        			continue;
+                			}
+                                        ip_h = (struct ipv4_hdr *) ((char *)eth_hdr + l2_len);
+                                        sip_addr = ip_h->src_addr;
+                                        tip_addr = ip_h->dst_addr;
+				}
+				printf("------------ L3 Details------------\n");
+				ipv4_addr_dump("   Source IP          : ", sip_addr);
+                                ipv4_addr_dump("\n   Destination IP     : ", tip_addr);
+				printf("\n");
+	
+				l2fwd_simple_forward(m, portid);
+			}
+		}
+	}
+}
+
+static int
+l2fwd_launch_one_lcore(__attribute__((unused)) void *dummy)
+{
+	l2fwd_main_loop();
+	return 0;
+}
+
+/* display usage */
+static void
+l2fwd_usage(const char *prgname)
+{
+	printf("%s [EAL options] -- -p PORTMASK [-q NQ]\n"
+	       "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
+	       "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
+		   "  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n"
+		"  -d DST PORT: user input to select the destination port\n"
+		"  -l MAC LEARNING: enable l2fwd mac learning 1-enable : 0 - disable(default) \n",
+	       prgname);
+}
+
+static int
+l2fwd_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;
+}
+
+static unsigned int
+l2fwd_parse_nqueue(const char *q_arg)
+{
+	char *end = NULL;
+	unsigned long n;
+
+	/* parse hexadecimal string */
+	n = strtoul(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return 0;
+	if (n == 0)
+		return 0;
+	if (n >= MAX_RX_QUEUE_PER_LCORE)
+		return 0;
+
+	return n;
+}
+
+static int
+l2fwd_parse_timer_period(const char *q_arg)
+{
+	char *end = NULL;
+	int n;
+
+	/* parse number string */
+	n = strtol(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+	if (n >= MAX_TIMER_PERIOD)
+		return -1;
+
+	return n;
+}
+
+static int
+pktcap_parse_dst_port(const char *q_arg)
+{
+	char *end = NULL;
+	int n;
+
+	/* parse number string */
+	n = strtol(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+	if (n > RTE_MAX_ETHPORTS)
+		return -1;
+
+	return n;
+}
+
+static int
+l2fwd_parse_mac_learning(const char *q_arg)
+{
+	char *end = NULL;
+	int n;
+
+	/* parse number string */
+	n = strtol(q_arg, &end, 0);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+	if (n > 1)
+		return -1;
+
+	return n;
+}
+/* Parse the argument given in the command line of the application */
+static int
+l2fwd_parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char **argvopt;
+	int option_index;
+	char *prgname = argv[0];
+	static struct option lgopts[] = {
+		{NULL, 0, 0, 0}
+	};
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "p:q:T:d:l:",
+				  lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+		/* portmask */
+		case 'p':
+			l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
+			if (l2fwd_enabled_port_mask == 0) {
+				printf("invalid portmask\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* nqueue */
+		case 'q':
+			l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
+			if (l2fwd_rx_queue_per_lcore == 0) {
+				printf("invalid queue number\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* timer period */
+		case 'T':
+			timer_period = l2fwd_parse_timer_period(optarg) * 1000 * TIMER_MILLISECOND;
+			if (timer_period < 0) {
+				printf("invalid timer period\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* user defined dst port*/
+		case 'd':
+			l2fwd_user_defined_dst_port = pktcap_parse_dst_port(optarg);
+			if (l2fwd_user_defined_dst_port < 0) {
+				printf("invalid port number\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+
+		/* l2 mac learning*/
+		case 'l':
+			l2fwd_mac_learning_enabled = l2fwd_parse_mac_learning(optarg);
+			if (l2fwd_mac_learning_enabled < 0) {
+				printf("invalid option\n");
+				l2fwd_usage(prgname);
+				return -1;
+			}
+			break;
+		/* long options */
+		case 0:
+			l2fwd_usage(prgname);
+			return -1;
+
+		default:
+			l2fwd_usage(prgname);
+			return -1;
+		}
+	}
+
+	if (optind >= 0)
+		argv[optind-1] = prgname;
+
+	ret = optind-1;
+	optind = 0; /* reset getopt lib */
+	return ret;
+}
+
+/* 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");
+		}
+	}
+}
+
+void *thread2(void)
+{	
+	if(start!=NULL)
+                {
+
+                        pthread_mutex_lock( &mutex1 );
+                        struct mac_list *temp=start;
+                        while(temp!=NULL)
+                        {
+				if(temp->aging_time>0)
+                                        temp->aging_time=default_aging_time-(time(NULL)-temp->rx_time);
+                                //strcpy(temp->buff,"check");
+                                temp=temp->next;
+                        }
+                      pthread_mutex_unlock( &mutex1 );
+                }
+	pthread_exit(NULL);
+	return NULL;
+}
+
+void update_node(struct mac_list *l_temp)
+{
+	struct node *temp,*temp2,*prev;
+	if(head!=NULL)
+	{	
+		while(head!=NULL)
+		{	
+			if(memcmp(&l_temp->s_addr, &head->s_addr, ETHER_ADDR_LEN) == 0)
+			{
+				temp=head;
+				head=head->next;
+				free(temp);
+			}
+			else
+				break;
+		}
+	//	if(head!=NULL)
+		temp=head->next;
+		prev=head;
+		while(temp!=NULL && head!=NULL)
+		{
+			if(memcmp(&l_temp->s_addr, &temp->s_addr, ETHER_ADDR_LEN) == 0)
+			{
+				prev->next=temp->next;
+				temp2=temp;
+				temp=temp->next;
+				free(temp2);	
+			}
+			else
+			{
+				temp=temp->next;
+				prev=prev->next;
+			}
+		}
+	}
+	
+	
+}
+
+
+void *thread1(void)
+{
+	struct mac_list *temp,*temp2,*prev;
+	
+		if(start!=NULL)
+		{
+		
+			pthread_mutex_lock( &mutex1 );	
+			while(start!=NULL)
+			{	
+				if( start->aging_time==0)
+				{
+					temp = start;
+					update_node(temp);
+					start=start->next;
+					free(temp);
+				
+				}
+				else
+					break;		 
+			}
+	//		if(start!=NULL)
+			temp = start->next;
+			prev=start;
+			while(temp!= NULL && start!=NULL)
+        		{
+		            
+		        	if(temp->aging_time==0)
+			     {
+				update_node(temp);
+				prev->next=temp->next;
+				temp2=temp;
+				temp=temp->next;
+				if(temp2!=NULL)
+					free(temp2);
+		     	      }
+		     	      else
+	 		      {
+					temp = temp->next; 
+					prev=prev->next;
+	    	       		}
+	        	}
+			pthread_mutex_unlock( &mutex1 );
+		}
+	pthread_exit(NULL);
+	return NULL;
+}
+void *threadInit(void)
+{
+	pthread_t t1,t2;
+	int err;
+	while(1)
+		{
+		err=pthread_create(&t1, NULL,(void *)thread1,NULL);//for checking the mac table
+		pthread_join(t1,NULL);
+		
+		
+		err=pthread_create(&t2,NULL,(void *)thread2,NULL);//for updating the mac table
+		pthread_join(t2,NULL);
+		
+		if(err!=0)
+		{
+			printf("thread not created\n");
+			exit(0);
+		}
+	}
+	return NULL;	
+}
+
+int
+main(int argc, char **argv)
+{
+	struct lcore_queue_conf *qconf;
+	struct rte_eth_dev_info dev_info;
+	int ret,err;
+	uint8_t nb_ports;
+	uint8_t nb_ports_available;
+	uint8_t portid, last_port;
+	unsigned lcore_id, rx_lcore_id;
+	unsigned nb_ports_in_mask = 0;
+	pthread_t t3;
+	/* init EAL */
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
+	argc -= ret;
+	argv += ret;
+
+	/* parse application arguments (after the EAL ones) */
+	ret = l2fwd_parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");
+
+	/* create the mbuf pool */
+	l2fwd_pktmbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", NB_MBUF, 32,
+		0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+	if (l2fwd_pktmbuf_pool == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot init mbuf pool\n");
+
+	nb_ports = rte_eth_dev_count();
+	if (nb_ports == 0)
+		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+
+	if (nb_ports > RTE_MAX_ETHPORTS)
+		nb_ports = RTE_MAX_ETHPORTS;
+
+	/* reset l2fwd_dst_ports */
+	for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
+		l2fwd_dst_ports[portid] = 0;
+	last_port = 0;
+		
+	printf("Entered port : %" PRId64 "\n",l2fwd_user_defined_dst_port);
+
+	/*
+	 * Each logical core is assigned a dedicated TX queue on each port.
+	 */
+	if(l2fwd_user_defined_dst_port == 0)
+	{
+		for (portid = 0; portid < nb_ports; portid++) {
+			/* skip ports that are not enabled */
+			if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+				continue;
+	
+			if (nb_ports_in_mask % 2) {
+				l2fwd_dst_ports[portid] = last_port;
+				l2fwd_dst_ports[last_port] = portid;
+			}
+			else
+				last_port = portid;
+	
+				nb_ports_in_mask++;
+	
+			rte_eth_dev_info_get(portid, &dev_info);
+		}
+		if (nb_ports_in_mask % 2) {
+			printf("Notice: odd number of ports in portmask.\n");
+			l2fwd_dst_ports[last_port] = last_port;
+		}
+
+	}
+	rx_lcore_id = 0;
+	qconf = NULL;
+
+	/* Initialize the port/queue configuration of each logical core */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+
+		/* get the lcore_id for this port */
+		while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
+		       lcore_queue_conf[rx_lcore_id].n_rx_port ==
+		       l2fwd_rx_queue_per_lcore) {
+			rx_lcore_id++;
+			if (rx_lcore_id >= RTE_MAX_LCORE)
+				rte_exit(EXIT_FAILURE, "Not enough cores\n");
+		}
+
+		if (qconf != &lcore_queue_conf[rx_lcore_id])
+			/* Assigned a new logical core in the loop above. */
+			qconf = &lcore_queue_conf[rx_lcore_id];
+
+		qconf->rx_port_list[qconf->n_rx_port] = portid;
+		qconf->n_rx_port++;
+		printf("Lcore %u: RX port %u\n", rx_lcore_id, (unsigned) portid);
+	}
+
+	nb_ports_available = nb_ports;
+	
+	/* Initialise each port */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
+			printf("Skipping disabled port %u\n", (unsigned) portid);
+			nb_ports_available--;
+			continue;
+		}
+		/* init port */
+		printf("Initializing port %u... ", (unsigned) portid);
+		fflush(stdout);
+		ret = rte_eth_dev_configure(portid, 1, 1, &port_conf);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+
+		rte_eth_macaddr_get(portid,&l2fwd_ports_eth_addr[portid]);
+
+		/* init one RX queue */
+		fflush(stdout);
+		ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
+					     rte_eth_dev_socket_id(portid),
+					     NULL,
+					     l2fwd_pktmbuf_pool);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+
+		/* init one TX queue on each port */
+		fflush(stdout);
+		ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
+				rte_eth_dev_socket_id(portid),
+				NULL);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup:err=%d, port=%u\n",
+				ret, (unsigned) portid);
+		/****************************************/
+		err=pthread_create(&t3,NULL,(void *)threadInit,NULL);
+		//thread for checking and updating the mac table
+		if(err!=0)
+		{
+			printf("thread not created\n");
+			exit(0);
+		}	
+		/****************************************/
+		/* Start device */
+		ret = rte_eth_dev_start(portid);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+
+		printf("done: \n");
+
+		rte_eth_promiscuous_enable(portid);
+
+		printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
+				(unsigned) portid,
+				l2fwd_ports_eth_addr[portid].addr_bytes[0],
+				l2fwd_ports_eth_addr[portid].addr_bytes[1],
+				l2fwd_ports_eth_addr[portid].addr_bytes[2],
+				l2fwd_ports_eth_addr[portid].addr_bytes[3],
+				l2fwd_ports_eth_addr[portid].addr_bytes[4],
+				l2fwd_ports_eth_addr[portid].addr_bytes[5]);
+
+		/* initialize port stats */
+		memset(&port_statistics, 0, sizeof(port_statistics));
+	}
+
+	if (!nb_ports_available) {
+		rte_exit(EXIT_FAILURE,
+			"All available ports are disabled. Please set portmask.\n");
+	}
+
+	check_all_ports_link_status(nb_ports, l2fwd_enabled_port_mask);
+
+	/* launch per-lcore init on every lcore */
+	rte_eal_mp_remote_launch(l2fwd_launch_one_lcore, NULL, CALL_MASTER);
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		if (rte_eal_wait_lcore(lcore_id) < 0)
+			return -1;
+	}
+	//pthread_join(t1,NULL);
+        //pthread_join(t2,NULL);
+
+	return 0;
+}
-- 
1.9.1