examples/l3fwd/l3fwd_lpm.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2016 Intel Corporation
 */

#include <stdio.h>
#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 <stdbool.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_cycles.h>
#include <rte_mbuf.h>
#include <rte_ip.h>
#include <rte_tcp.h>
#include <rte_udp.h>
#include <rte_lpm.h>
#include <rte_lpm6.h>

#include "l3fwd.h"
#include "l3fwd_common.h"
#include "l3fwd_event.h"

#include "lpm_route_parse.c"

#define IPV4_L3FWD_LPM_MAX_RULES         1024
#define IPV4_L3FWD_LPM_NUMBER_TBL8S (1 << 8)
#define IPV6_L3FWD_LPM_MAX_RULES         1024
#define IPV6_L3FWD_LPM_NUMBER_TBL8S (1 << 16)

static struct rte_lpm *ipv4_l3fwd_lpm_lookup_struct[NB_SOCKETS];
static struct rte_lpm6 *ipv6_l3fwd_lpm_lookup_struct[NB_SOCKETS];

/* Performing LPM-based lookups. 8< */
static inline uint16_t
lpm_get_ipv4_dst_port(const struct rte_ipv4_hdr *ipv4_hdr,
              uint16_t portid,
              struct rte_lpm *ipv4_l3fwd_lookup_struct)
{
    uint32_t dst_ip = rte_be_to_cpu_32(ipv4_hdr->dst_addr);
    uint32_t next_hop;

    if (rte_lpm_lookup(ipv4_l3fwd_lookup_struct, dst_ip, &next_hop) == 0)
        return next_hop;
    else
        return portid;
}
/* >8 End of performing LPM-based lookups. */

static inline uint16_t
lpm_get_ipv6_dst_port(const struct rte_ipv6_hdr *ipv6_hdr,
              uint16_t portid,
              struct rte_lpm6 *ipv6_l3fwd_lookup_struct)
{
    const uint8_t *dst_ip = ipv6_hdr->dst_addr;
    uint32_t next_hop;

    if (rte_lpm6_lookup(ipv6_l3fwd_lookup_struct, dst_ip, &next_hop) == 0)
        return next_hop;
    else
        return portid;
}

static __rte_always_inline uint16_t
lpm_get_dst_port(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
        uint16_t portid)
{
    struct rte_ipv6_hdr *ipv6_hdr;
    struct rte_ipv4_hdr *ipv4_hdr;
    struct rte_ether_hdr *eth_hdr;

    if (RTE_ETH_IS_IPV4_HDR(pkt->packet_type)) {

        eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
        ipv4_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1);

        return lpm_get_ipv4_dst_port(ipv4_hdr, portid,
                         qconf->ipv4_lookup_struct);
    } else if (RTE_ETH_IS_IPV6_HDR(pkt->packet_type)) {

        eth_hdr = rte_pktmbuf_mtod(pkt, struct rte_ether_hdr *);
        ipv6_hdr = (struct rte_ipv6_hdr *)(eth_hdr + 1);

        return lpm_get_ipv6_dst_port(ipv6_hdr, portid,
                         qconf->ipv6_lookup_struct);
    }

    return portid;
}

/*
 * lpm_get_dst_port optimized routine for packets where dst_ipv4 is already
 * precalculated. If packet is ipv6 dst_addr is taken directly from packet
 * header and dst_ipv4 value is not used.
 */
static __rte_always_inline uint16_t
lpm_get_dst_port_with_ipv4(const struct lcore_conf *qconf, struct rte_mbuf *pkt,
    uint32_t dst_ipv4, uint16_t portid)
{
    uint32_t next_hop;
    struct rte_ipv6_hdr *ipv6_hdr;
    struct rte_ether_hdr *eth_hdr;

    if (RTE_ETH_IS_IPV4_HDR(pkt->packet_type)) {
        return (uint16_t) ((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 rte_ether_hdr *);
        ipv6_hdr = (struct rte_ipv6_hdr *)(eth_hdr + 1);

        return (uint16_t) ((rte_lpm6_lookup(qconf->ipv6_lookup_struct,
                ipv6_hdr->dst_addr, &next_hop) == 0)
                ? next_hop : portid);

    }

    return portid;
}

#if defined(RTE_ARCH_X86)
#include "l3fwd_lpm_sse.h"
#elif defined __ARM_NEON
#include "l3fwd_lpm_neon.h"
#elif defined(RTE_ARCH_PPC_64)
#include "l3fwd_lpm_altivec.h"
#else
#include "l3fwd_lpm.h"
#endif

/* main processing loop */
int
lpm_main_loop(__rte_unused void *dummy)
{
    struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
    unsigned lcore_id;
    uint64_t prev_tsc, diff_tsc, cur_tsc;
    int i, nb_rx;
    uint16_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;

    lcore_id = rte_lcore_id();
    qconf = &lcore_conf[lcore_id];

    const uint16_t n_rx_q = qconf->n_rx_queue;
    const uint16_t n_tx_p = qconf->n_tx_port;
    if (n_rx_q == 0) {
        RTE_LOG(INFO, L3FWD, "lcore %u has nothing to do\n", lcore_id);
        return 0;
    }

    RTE_LOG(INFO, L3FWD, "entering main loop on lcore %u\n", lcore_id);

    for (i = 0; i < n_rx_q; i++) {

        portid = qconf->rx_queue_list[i].port_id;
        queueid = qconf->rx_queue_list[i].queue_id;
        RTE_LOG(INFO, L3FWD,
            " -- lcoreid=%u portid=%u rxqueueid=%" PRIu16 "\n",
            lcore_id, portid, queueid);
    }

    cur_tsc = rte_rdtsc();
    prev_tsc = cur_tsc;

    while (!force_quit) {

        /*
         * TX burst queue drain
         */
        diff_tsc = cur_tsc - prev_tsc;
        if (unlikely(diff_tsc > drain_tsc)) {

            for (i = 0; i < n_tx_p; ++i) {
                portid = qconf->tx_port_id[i];
                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 < n_rx_q; ++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 == 0)
                continue;

#if defined RTE_ARCH_X86 || defined __ARM_NEON \
             || defined RTE_ARCH_PPC_64
            l3fwd_lpm_send_packets(nb_rx, pkts_burst,
                        portid, qconf);
#else
            l3fwd_lpm_no_opt_send_packets(nb_rx, pkts_burst,
                            portid, qconf);
#endif /* X86 */
        }

        cur_tsc = rte_rdtsc();
    }

    return 0;
}

#ifdef RTE_LIB_EVENTDEV
static __rte_always_inline uint16_t
lpm_process_event_pkt(const struct lcore_conf *lconf, struct rte_mbuf *mbuf)
{
    mbuf->port = lpm_get_dst_port(lconf, mbuf, mbuf->port);

#if defined RTE_ARCH_X86 || defined __ARM_NEON \
    || defined RTE_ARCH_PPC_64
    process_packet(mbuf, &mbuf->port);
#else

    struct rte_ether_hdr *eth_hdr = rte_pktmbuf_mtod(mbuf,
            struct rte_ether_hdr *);

    /* dst addr */
    *(uint64_t *)&eth_hdr->dst_addr = dest_eth_addr[mbuf->port];

    /* src addr */
    rte_ether_addr_copy(&ports_eth_addr[mbuf->port],
            &eth_hdr->src_addr);

    rfc1812_process(rte_pktmbuf_mtod_offset(mbuf, struct rte_ipv4_hdr *,
                        sizeof(struct rte_ether_hdr)),
            &mbuf->port, mbuf->packet_type);
#endif
    return mbuf->port;
}

static __rte_always_inline void
lpm_event_loop_single(struct l3fwd_event_resources *evt_rsrc,
        const uint8_t flags)
{
    const int event_p_id = l3fwd_get_free_event_port(evt_rsrc);
    const uint8_t tx_q_id = evt_rsrc->evq.event_q_id[
        evt_rsrc->evq.nb_queues - 1];
    const uint8_t event_d_id = evt_rsrc->event_d_id;
    uint8_t enq = 0, deq = 0;
    struct lcore_conf *lconf;
    unsigned int lcore_id;
    struct rte_event ev;

    if (event_p_id < 0)
        return;

    lcore_id = rte_lcore_id();
    lconf = &lcore_conf[lcore_id];

    RTE_LOG(INFO, L3FWD, "entering %s on lcore %u\n", __func__, lcore_id);
    while (!force_quit) {
        deq = rte_event_dequeue_burst(event_d_id, event_p_id, &ev, 1,
                          0);
        if (!deq)
            continue;

        if (lpm_process_event_pkt(lconf, ev.mbuf) == BAD_PORT) {
            rte_pktmbuf_free(ev.mbuf);
            continue;
        }

        if (flags & L3FWD_EVENT_TX_ENQ) {
            ev.queue_id = tx_q_id;
            ev.op = RTE_EVENT_OP_FORWARD;
            do {
                enq = rte_event_enqueue_burst(
                    event_d_id, event_p_id, &ev, 1);
            } while (!enq && !force_quit);
        }

        if (flags & L3FWD_EVENT_TX_DIRECT) {
            rte_event_eth_tx_adapter_txq_set(ev.mbuf, 0);
            do {
                enq = rte_event_eth_tx_adapter_enqueue(
                    event_d_id, event_p_id, &ev, 1, 0);
            } while (!enq && !force_quit);
        }
    }

    l3fwd_event_worker_cleanup(event_d_id, event_p_id, &ev, enq, deq, 0);
}

static __rte_always_inline void
lpm_event_loop_burst(struct l3fwd_event_resources *evt_rsrc,
        const uint8_t flags)
{
    const int event_p_id = l3fwd_get_free_event_port(evt_rsrc);
    const uint8_t tx_q_id = evt_rsrc->evq.event_q_id[
        evt_rsrc->evq.nb_queues - 1];
    const uint8_t event_d_id = evt_rsrc->event_d_id;
    const uint16_t deq_len = evt_rsrc->deq_depth;
    struct rte_event events[MAX_PKT_BURST];
    int i, nb_enq = 0, nb_deq = 0;
    struct lcore_conf *lconf;
    unsigned int lcore_id;

    if (event_p_id < 0)
        return;

    lcore_id = rte_lcore_id();

    lconf = &lcore_conf[lcore_id];

    RTE_LOG(INFO, L3FWD, "entering %s on lcore %u\n", __func__, lcore_id);

    while (!force_quit) {
        /* Read events from RX queues */
        nb_deq = rte_event_dequeue_burst(event_d_id, event_p_id,
                events, deq_len, 0);
        if (nb_deq == 0) {
            rte_pause();
            continue;
        }

        for (i = 0; i < nb_deq; i++) {
            if (flags & L3FWD_EVENT_TX_ENQ) {
                events[i].queue_id = tx_q_id;
                events[i].op = RTE_EVENT_OP_FORWARD;
            }

            if (flags & L3FWD_EVENT_TX_DIRECT)
                rte_event_eth_tx_adapter_txq_set(events[i].mbuf,
                                 0);

            lpm_process_event_pkt(lconf, events[i].mbuf);
        }

        if (flags & L3FWD_EVENT_TX_ENQ) {
            nb_enq = rte_event_enqueue_burst(event_d_id, event_p_id,
                    events, nb_deq);
            while (nb_enq < nb_deq && !force_quit)
                nb_enq += rte_event_enqueue_burst(event_d_id,
                        event_p_id, events + nb_enq,
                        nb_deq - nb_enq);
        }

        if (flags & L3FWD_EVENT_TX_DIRECT) {
            nb_enq = rte_event_eth_tx_adapter_enqueue(event_d_id,
                    event_p_id, events, nb_deq, 0);
            while (nb_enq < nb_deq && !force_quit)
                nb_enq += rte_event_eth_tx_adapter_enqueue(
                        event_d_id, event_p_id,
                        events + nb_enq,
                        nb_deq - nb_enq, 0);
        }
    }

    l3fwd_event_worker_cleanup(event_d_id, event_p_id, events, nb_enq,
                   nb_deq, 0);
}

static __rte_always_inline void
lpm_event_loop(struct l3fwd_event_resources *evt_rsrc,
         const uint8_t flags)
{
    if (flags & L3FWD_EVENT_SINGLE)
        lpm_event_loop_single(evt_rsrc, flags);
    if (flags & L3FWD_EVENT_BURST)
        lpm_event_loop_burst(evt_rsrc, flags);
}

int __rte_noinline
lpm_event_main_loop_tx_d(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc =
                    l3fwd_get_eventdev_rsrc();

    lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_DIRECT | L3FWD_EVENT_SINGLE);
    return 0;
}

int __rte_noinline
lpm_event_main_loop_tx_d_burst(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc =
                    l3fwd_get_eventdev_rsrc();

    lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_DIRECT | L3FWD_EVENT_BURST);
    return 0;
}

int __rte_noinline
lpm_event_main_loop_tx_q(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc =
                    l3fwd_get_eventdev_rsrc();

    lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_ENQ | L3FWD_EVENT_SINGLE);
    return 0;
}

int __rte_noinline
lpm_event_main_loop_tx_q_burst(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc =
                    l3fwd_get_eventdev_rsrc();

    lpm_event_loop(evt_rsrc, L3FWD_EVENT_TX_ENQ | L3FWD_EVENT_BURST);
    return 0;
}

static __rte_always_inline void
lpm_process_event_vector(struct rte_event_vector *vec, struct lcore_conf *lconf,
             uint16_t *dst_port)
{
    struct rte_mbuf **mbufs = vec->mbufs;
    int i;

#if defined RTE_ARCH_X86 || defined __ARM_NEON || defined RTE_ARCH_PPC_64
    if (vec->attr_valid) {
        l3fwd_lpm_process_packets(vec->nb_elem, mbufs, vec->port,
                      dst_port, lconf, 1);
    } else {
        for (i = 0; i < vec->nb_elem; i++)
            l3fwd_lpm_process_packets(1, &mbufs[i], mbufs[i]->port,
                          &dst_port[i], lconf, 1);
    }
#else
    for (i = 0; i < vec->nb_elem; i++)
        dst_port[i] = lpm_process_event_pkt(lconf, mbufs[i]);
#endif

    process_event_vector(vec, dst_port);
}

/* Same eventdev loop for single and burst of vector */
static __rte_always_inline void
lpm_event_loop_vector(struct l3fwd_event_resources *evt_rsrc,
              const uint8_t flags)
{
    const int event_p_id = l3fwd_get_free_event_port(evt_rsrc);
    const uint8_t tx_q_id =
        evt_rsrc->evq.event_q_id[evt_rsrc->evq.nb_queues - 1];
    const uint8_t event_d_id = evt_rsrc->event_d_id;
    const uint16_t deq_len = evt_rsrc->deq_depth;
    struct rte_event events[MAX_PKT_BURST];
    int i, nb_enq = 0, nb_deq = 0;
    struct lcore_conf *lconf;
    uint16_t *dst_port_list;
    unsigned int lcore_id;

    if (event_p_id < 0)
        return;

    lcore_id = rte_lcore_id();
    lconf = &lcore_conf[lcore_id];
    dst_port_list =
        rte_zmalloc("", sizeof(uint16_t) * evt_rsrc->vector_size,
                RTE_CACHE_LINE_SIZE);
    if (dst_port_list == NULL)
        return;
    RTE_LOG(INFO, L3FWD, "entering %s on lcore %u\n", __func__, lcore_id);

    while (!force_quit) {
        /* Read events from RX queues */
        nb_deq = rte_event_dequeue_burst(event_d_id, event_p_id, events,
                         deq_len, 0);
        if (nb_deq == 0) {
            rte_pause();
            continue;
        }

        for (i = 0; i < nb_deq; i++) {
            if (flags & L3FWD_EVENT_TX_ENQ) {
                events[i].queue_id = tx_q_id;
                events[i].op = RTE_EVENT_OP_FORWARD;
            }

            lpm_process_event_vector(events[i].vec, lconf,
                         dst_port_list);
        }

        if (flags & L3FWD_EVENT_TX_ENQ) {
            nb_enq = rte_event_enqueue_burst(event_d_id, event_p_id,
                             events, nb_deq);
            while (nb_enq < nb_deq && !force_quit)
                nb_enq += rte_event_enqueue_burst(
                    event_d_id, event_p_id, events + nb_enq,
                    nb_deq - nb_enq);
        }

        if (flags & L3FWD_EVENT_TX_DIRECT) {
            nb_enq = rte_event_eth_tx_adapter_enqueue(
                event_d_id, event_p_id, events, nb_deq, 0);
            while (nb_enq < nb_deq && !force_quit)
                nb_enq += rte_event_eth_tx_adapter_enqueue(
                    event_d_id, event_p_id, events + nb_enq,
                    nb_deq - nb_enq, 0);
        }
    }

    l3fwd_event_worker_cleanup(event_d_id, event_p_id, events, nb_enq,
                   nb_deq, 1);
    rte_free(dst_port_list);
}

int __rte_noinline
lpm_event_main_loop_tx_d_vector(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc = l3fwd_get_eventdev_rsrc();

    lpm_event_loop_vector(evt_rsrc, L3FWD_EVENT_TX_DIRECT);
    return 0;
}

int __rte_noinline
lpm_event_main_loop_tx_d_burst_vector(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc = l3fwd_get_eventdev_rsrc();

    lpm_event_loop_vector(evt_rsrc, L3FWD_EVENT_TX_DIRECT);
    return 0;
}

int __rte_noinline
lpm_event_main_loop_tx_q_vector(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc = l3fwd_get_eventdev_rsrc();

    lpm_event_loop_vector(evt_rsrc, L3FWD_EVENT_TX_ENQ);
    return 0;
}

int __rte_noinline
lpm_event_main_loop_tx_q_burst_vector(__rte_unused void *dummy)
{
    struct l3fwd_event_resources *evt_rsrc = l3fwd_get_eventdev_rsrc();

    lpm_event_loop_vector(evt_rsrc, L3FWD_EVENT_TX_ENQ);
    return 0;
}
#endif

void
setup_lpm(const int socketid)
{
    struct rte_eth_dev_info dev_info;
    struct rte_lpm6_config config;
    struct rte_lpm_config config_ipv4;
    int i;
    int ret;
    char s[64];
    char abuf[INET6_ADDRSTRLEN];

    /* create the LPM table */
    config_ipv4.max_rules = IPV4_L3FWD_LPM_MAX_RULES;
    config_ipv4.number_tbl8s = IPV4_L3FWD_LPM_NUMBER_TBL8S;
    config_ipv4.flags = 0;
    snprintf(s, sizeof(s), "IPV4_L3FWD_LPM_%d", socketid);
    ipv4_l3fwd_lpm_lookup_struct[socketid] =
            rte_lpm_create(s, socketid, &config_ipv4);
    if (ipv4_l3fwd_lpm_lookup_struct[socketid] == NULL)
        rte_exit(EXIT_FAILURE,
            "Unable to create the l3fwd LPM table on socket %d\n",
            socketid);

    /* populate the LPM table */
    for (i = 0; i < route_num_v4; i++) {
        struct in_addr in;

        /* skip unused ports */
        if ((1 << route_base_v4[i].if_out &
                enabled_port_mask) == 0)
            continue;

        rte_eth_dev_info_get(route_base_v4[i].if_out,
                     &dev_info);
        ret = rte_lpm_add(ipv4_l3fwd_lpm_lookup_struct[socketid],
            route_base_v4[i].ip,
            route_base_v4[i].depth,
            route_base_v4[i].if_out);

        if (ret < 0) {
            lpm_free_routes();
            rte_exit(EXIT_FAILURE,
                "Unable to add entry %u to the l3fwd LPM table on socket %d\n",
                i, socketid);
        }

        in.s_addr = htonl(route_base_v4[i].ip);
        printf("LPM: Adding route %s / %d (%d) [%s]\n",
               inet_ntop(AF_INET, &in, abuf, sizeof(abuf)),
               route_base_v4[i].depth,
               route_base_v4[i].if_out, rte_dev_name(dev_info.device));
    }

    /* create the LPM6 table */
    snprintf(s, sizeof(s), "IPV6_L3FWD_LPM_%d", socketid);

    config.max_rules = IPV6_L3FWD_LPM_MAX_RULES;
    config.number_tbl8s = IPV6_L3FWD_LPM_NUMBER_TBL8S;
    config.flags = 0;
    ipv6_l3fwd_lpm_lookup_struct[socketid] = rte_lpm6_create(s, socketid,
                &config);
    if (ipv6_l3fwd_lpm_lookup_struct[socketid] == NULL) {
        lpm_free_routes();
        rte_exit(EXIT_FAILURE,
            "Unable to create the l3fwd LPM table on socket %d\n",
            socketid);
    }

    /* populate the LPM table */
    for (i = 0; i < route_num_v6; i++) {

        /* skip unused ports */
        if ((1 << route_base_v6[i].if_out &
                enabled_port_mask) == 0)
            continue;

        rte_eth_dev_info_get(route_base_v6[i].if_out,
                     &dev_info);
        ret = rte_lpm6_add(ipv6_l3fwd_lpm_lookup_struct[socketid],
            route_base_v6[i].ip_8,
            route_base_v6[i].depth,
            route_base_v6[i].if_out);

        if (ret < 0) {
            lpm_free_routes();
            rte_exit(EXIT_FAILURE,
                "Unable to add entry %u to the l3fwd LPM table on socket %d\n",
                i, socketid);
        }

        printf("LPM: Adding route %s / %d (%d) [%s]\n",
               inet_ntop(AF_INET6, route_base_v6[i].ip_8, abuf,
                 sizeof(abuf)),
               route_base_v6[i].depth,
               route_base_v6[i].if_out, rte_dev_name(dev_info.device));
    }
}

int
lpm_check_ptype(int portid)
{
    int i, ret;
    int ptype_l3_ipv4 = 0, ptype_l3_ipv6 = 0;
    uint32_t ptype_mask = RTE_PTYPE_L3_MASK;

    ret = rte_eth_dev_get_supported_ptypes(portid, ptype_mask, NULL, 0);
    if (ret <= 0)
        return 0;

    uint32_t ptypes[ret];

    ret = rte_eth_dev_get_supported_ptypes(portid, ptype_mask, ptypes, ret);
    for (i = 0; i < ret; ++i) {
        if (ptypes[i] & RTE_PTYPE_L3_IPV4)
            ptype_l3_ipv4 = 1;
        if (ptypes[i] & RTE_PTYPE_L3_IPV6)
            ptype_l3_ipv6 = 1;
    }

    if (!ipv6 && !ptype_l3_ipv4) {
        printf("port %d cannot parse RTE_PTYPE_L3_IPV4\n", portid);
        return 0;
    }

    if (ipv6 && !ptype_l3_ipv6) {
        printf("port %d cannot parse RTE_PTYPE_L3_IPV6\n", portid);
        return 0;
    }

    return 1;

}

static inline void
lpm_parse_ptype(struct rte_mbuf *m)
{
    struct rte_ether_hdr *eth_hdr;
    uint32_t packet_type = RTE_PTYPE_UNKNOWN;
    uint16_t ether_type;

    eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
    ether_type = eth_hdr->ether_type;
    if (ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV4))
        packet_type |= RTE_PTYPE_L3_IPV4_EXT_UNKNOWN;
    else if (ether_type == rte_cpu_to_be_16(RTE_ETHER_TYPE_IPV6))
        packet_type |= RTE_PTYPE_L3_IPV6_EXT_UNKNOWN;

    m->packet_type = packet_type;
}

uint16_t
lpm_cb_parse_ptype(uint16_t port __rte_unused, uint16_t queue __rte_unused,
           struct rte_mbuf *pkts[], uint16_t nb_pkts,
           uint16_t max_pkts __rte_unused,
           void *user_param __rte_unused)
{
    unsigned int i;

    if (unlikely(nb_pkts == 0))
        return nb_pkts;
    rte_prefetch0(rte_pktmbuf_mtod(pkts[0], struct ether_hdr *));
    for (i = 0; i < (unsigned int) (nb_pkts - 1); ++i) {
        rte_prefetch0(rte_pktmbuf_mtod(pkts[i+1],
            struct ether_hdr *));
        lpm_parse_ptype(pkts[i]);
    }
    lpm_parse_ptype(pkts[i]);

    return nb_pkts;
}

/* Return ipv4/ipv6 lpm fwd lookup struct. */
void *
lpm_get_ipv4_l3fwd_lookup_struct(const int socketid)
{
    return ipv4_l3fwd_lpm_lookup_struct[socketid];
}

void *
lpm_get_ipv6_l3fwd_lookup_struct(const int socketid)
{
    return ipv6_l3fwd_lpm_lookup_struct[socketid];
}