examples/ip_reassembly/main.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 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 <signal.h>
#include <sys/param.h>

#include <rte_common.h>
#include <rte_byteorder.h>
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_eal.h>
#include <rte_launch.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_random.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_malloc.h>
#include <rte_ip.h>
#include <rte_tcp.h>
#include <rte_udp.h>
#include <rte_string_fns.h>
#include <rte_lpm.h>
#include <rte_lpm6.h>

#include <rte_ip_frag.h>

#define MAX_PKT_BURST 32


#define RTE_LOGTYPE_IP_RSMBL RTE_LOGTYPE_USER1

#define MAX_JUMBO_PKT_LEN  9600

#define BUF_SIZE    RTE_MBUF_DEFAULT_DATAROOM
#define MBUF_DATA_SIZE  RTE_MBUF_DEFAULT_BUF_SIZE

#define NB_MBUF 8192
#define MEMPOOL_CACHE_SIZE 256

/* allow max jumbo frame 9.5 KB */
#define JUMBO_FRAME_MAX_SIZE    0x2600

#define MAX_FLOW_NUM    UINT16_MAX
#define MIN_FLOW_NUM    1
#define DEF_FLOW_NUM    0x1000

/* TTL numbers are in ms. */
#define MAX_FLOW_TTL    (3600 * MS_PER_S)
#define MIN_FLOW_TTL    1
#define DEF_FLOW_TTL    MS_PER_S

#define MAX_FRAG_NUM RTE_LIBRTE_IP_FRAG_MAX_FRAG

/* Should be power of two. */
#define IP_FRAG_TBL_BUCKET_ENTRIES  16

static uint32_t max_flow_num = DEF_FLOW_NUM;
static uint32_t max_flow_ttl = DEF_FLOW_TTL;

#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */

#define NB_SOCKETS 8

/* Configure how many packets ahead to prefetch, when reading packets */
#define PREFETCH_OFFSET 3

/*
 * Configurable number of RX/TX ring descriptors
 */
#define RTE_TEST_RX_DESC_DEFAULT 1024
#define RTE_TEST_TX_DESC_DEFAULT 1024

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 rte_ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];

#ifndef IPv4_BYTES
#define IPv4_BYTES_FMT "%" PRIu8 ".%" PRIu8 ".%" PRIu8 ".%" PRIu8
#define IPv4_BYTES(addr) \
        (uint8_t) (((addr) >> 24) & 0xFF),\
        (uint8_t) (((addr) >> 16) & 0xFF),\
        (uint8_t) (((addr) >> 8) & 0xFF),\
        (uint8_t) ((addr) & 0xFF)
#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 IPV6_ADDR_LEN 16

/* mask of enabled ports */
static uint32_t enabled_port_mask = 0;

static int rx_queue_per_lcore = 1;

struct mbuf_table {
    uint32_t len;
    uint32_t head;
    uint32_t tail;
    struct rte_mbuf *m_table[0];
};

struct rx_queue {
    struct rte_ip_frag_tbl *frag_tbl;
    struct rte_mempool *pool;
    struct rte_lpm *lpm;
    struct rte_lpm6 *lpm6;
    uint16_t portid;
};

struct tx_lcore_stat {
    uint64_t call;
    uint64_t drop;
    uint64_t queue;
    uint64_t send;
};

#define MAX_RX_QUEUE_PER_LCORE 16
#define MAX_TX_QUEUE_PER_PORT 16
#define MAX_RX_QUEUE_PER_PORT 128

struct lcore_queue_conf {
    uint16_t n_rx_queue;
    struct rx_queue rx_queue_list[MAX_RX_QUEUE_PER_LCORE];
    uint16_t tx_queue_id[RTE_MAX_ETHPORTS];
    struct rte_ip_frag_death_row death_row;
    struct mbuf_table *tx_mbufs[RTE_MAX_ETHPORTS];
    struct tx_lcore_stat tx_stat;
} __rte_cache_aligned;
static struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];

static struct rte_eth_conf port_conf = {
    .rxmode = {
        .mq_mode        = RTE_ETH_MQ_RX_RSS,
        .mtu = JUMBO_FRAME_MAX_SIZE - RTE_ETHER_HDR_LEN -
            RTE_ETHER_CRC_LEN,
        .split_hdr_size = 0,
        .offloads = RTE_ETH_RX_OFFLOAD_CHECKSUM,
    },
    .rx_adv_conf = {
            .rss_conf = {
                .rss_key = NULL,
                .rss_hf = RTE_ETH_RSS_IP,
        },
    },
    .txmode = {
        .mq_mode = RTE_ETH_MQ_TX_NONE,
        .offloads = (RTE_ETH_TX_OFFLOAD_IPV4_CKSUM |
                 RTE_ETH_TX_OFFLOAD_MULTI_SEGS),
    },
};

/*
 * IPv4 forwarding table
 */
struct l3fwd_ipv4_route {
    uint32_t ip;
    uint8_t  depth;
    uint8_t  if_out;
};

/* Default l3fwd_ipv4_route_array table. 8< */
struct l3fwd_ipv4_route l3fwd_ipv4_route_array[] = {
        {RTE_IPV4(100,10,0,0), 16, 0},
        {RTE_IPV4(100,20,0,0), 16, 1},
        {RTE_IPV4(100,30,0,0), 16, 2},
        {RTE_IPV4(100,40,0,0), 16, 3},
        {RTE_IPV4(100,50,0,0), 16, 4},
        {RTE_IPV4(100,60,0,0), 16, 5},
        {RTE_IPV4(100,70,0,0), 16, 6},
        {RTE_IPV4(100,80,0,0), 16, 7},
};
/* >8 End of default l3fwd_ipv4_route_array table. */

/*
 * IPv6 forwarding table
 */

struct l3fwd_ipv6_route {
    uint8_t ip[IPV6_ADDR_LEN];
    uint8_t depth;
    uint8_t if_out;
};

/* Default l3fwd_ipv6_route_array table. 8< */
static struct l3fwd_ipv6_route l3fwd_ipv6_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},
};
/* >8 End of default l3fwd_ipv6_route_array table. */

#define LPM_MAX_RULES         1024
#define LPM6_MAX_RULES         1024
#define LPM6_NUMBER_TBL8S (1 << 16)

struct rte_lpm6_config lpm6_config = {
        .max_rules = LPM6_MAX_RULES,
        .number_tbl8s = LPM6_NUMBER_TBL8S,
        .flags = 0
};

static struct rte_lpm *socket_lpm[RTE_MAX_NUMA_NODES];
static struct rte_lpm6 *socket_lpm6[RTE_MAX_NUMA_NODES];

#ifdef RTE_LIBRTE_IP_FRAG_TBL_STAT
#define TX_LCORE_STAT_UPDATE(s, f, v)   ((s)->f += (v))
#else
#define TX_LCORE_STAT_UPDATE(s, f, v)   do {} while (0)
#endif /* RTE_LIBRTE_IP_FRAG_TBL_STAT */

/*
 * If number of queued packets reached given threshold, then
 * send burst of packets on an output interface.
 */
static inline uint32_t
send_burst(struct lcore_queue_conf *qconf, uint32_t thresh, uint16_t port)
{
    uint32_t fill, len, k, n;
    struct mbuf_table *txmb;

    txmb = qconf->tx_mbufs[port];
    len = txmb->len;

    if ((int32_t)(fill = txmb->head - txmb->tail) < 0)
        fill += len;

    if (fill >= thresh) {
        n = RTE_MIN(len - txmb->tail, fill);

        k = rte_eth_tx_burst(port, qconf->tx_queue_id[port],
            txmb->m_table + txmb->tail, (uint16_t)n);

        TX_LCORE_STAT_UPDATE(&qconf->tx_stat, call, 1);
        TX_LCORE_STAT_UPDATE(&qconf->tx_stat, send, k);

        fill -= k;
        if ((txmb->tail += k) == len)
            txmb->tail = 0;
    }

    return fill;
}

/* Enqueue a single packet, and send burst if queue is filled */
static inline int
send_single_packet(struct rte_mbuf *m, uint16_t port)
{
    uint32_t fill, lcore_id, len;
    struct lcore_queue_conf *qconf;
    struct mbuf_table *txmb;

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

    txmb = qconf->tx_mbufs[port];
    len = txmb->len;

    fill = send_burst(qconf, MAX_PKT_BURST, port);

    if (fill == len - 1) {
        TX_LCORE_STAT_UPDATE(&qconf->tx_stat, drop, 1);
        rte_pktmbuf_free(txmb->m_table[txmb->tail]);
        if (++txmb->tail == len)
            txmb->tail = 0;
    }

    TX_LCORE_STAT_UPDATE(&qconf->tx_stat, queue, 1);
    txmb->m_table[txmb->head] = m;
    if(++txmb->head == len)
        txmb->head = 0;

    return 0;
}

static inline void
reassemble(struct rte_mbuf *m, uint16_t portid, uint32_t queue,
    struct lcore_queue_conf *qconf, uint64_t tms)
{
    struct rte_ether_hdr *eth_hdr;
    struct rte_ip_frag_tbl *tbl;
    struct rte_ip_frag_death_row *dr;
    struct rx_queue *rxq;
    void *d_addr_bytes;
    uint32_t next_hop;
    uint16_t dst_port;

    rxq = &qconf->rx_queue_list[queue];

    eth_hdr = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);

    dst_port = portid;

    /* if packet is IPv4 */
    if (RTE_ETH_IS_IPV4_HDR(m->packet_type)) {
        struct rte_ipv4_hdr *ip_hdr;
        uint32_t ip_dst;

        ip_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1);

         /* if it is a fragmented packet, then try to reassemble. */
        if (rte_ipv4_frag_pkt_is_fragmented(ip_hdr)) {
            struct rte_mbuf *mo;

            tbl = rxq->frag_tbl;
            dr = &qconf->death_row;

            /* prepare mbuf: setup l2_len/l3_len. */
            m->l2_len = sizeof(*eth_hdr);
            m->l3_len = sizeof(*ip_hdr);

            /* process this fragment. */
            mo = rte_ipv4_frag_reassemble_packet(tbl, dr, m, tms, ip_hdr);
            if (mo == NULL)
                /* no packet to send out. */
                return;

            /* we have our packet reassembled. */
            if (mo != m) {
                m = mo;
                eth_hdr = rte_pktmbuf_mtod(m,
                    struct rte_ether_hdr *);
                ip_hdr = (struct rte_ipv4_hdr *)(eth_hdr + 1);
            }

            /* update offloading flags */
            m->ol_flags |= (RTE_MBUF_F_TX_IPV4 | RTE_MBUF_F_TX_IP_CKSUM);
        }
        ip_dst = rte_be_to_cpu_32(ip_hdr->dst_addr);

        /* Find destination port */
        if (rte_lpm_lookup(rxq->lpm, ip_dst, &next_hop) == 0 &&
                (enabled_port_mask & 1 << next_hop) != 0) {
            dst_port = next_hop;
        }

        eth_hdr->ether_type = rte_be_to_cpu_16(RTE_ETHER_TYPE_IPV4);
    } else if (RTE_ETH_IS_IPV6_HDR(m->packet_type)) {
        /* if packet is IPv6 */
        struct rte_ipv6_fragment_ext *frag_hdr;
        struct rte_ipv6_hdr *ip_hdr;

        ip_hdr = (struct rte_ipv6_hdr *)(eth_hdr + 1);

        frag_hdr = rte_ipv6_frag_get_ipv6_fragment_header(ip_hdr);

        if (frag_hdr != NULL) {
            struct rte_mbuf *mo;

            tbl = rxq->frag_tbl;
            dr  = &qconf->death_row;

            /* prepare mbuf: setup l2_len/l3_len. */
            m->l2_len = sizeof(*eth_hdr);
            m->l3_len = sizeof(*ip_hdr) + sizeof(*frag_hdr);

            mo = rte_ipv6_frag_reassemble_packet(tbl, dr, m, tms, ip_hdr, frag_hdr);
            if (mo == NULL)
                return;

            if (mo != m) {
                m = mo;
                eth_hdr = rte_pktmbuf_mtod(m,
                            struct rte_ether_hdr *);
                ip_hdr = (struct rte_ipv6_hdr *)(eth_hdr + 1);
            }
        }

        /* Find destination port */
        if (rte_lpm6_lookup(rxq->lpm6, ip_hdr->dst_addr,
                        &next_hop) == 0 &&
                (enabled_port_mask & 1 << next_hop) != 0) {
            dst_port = next_hop;
        }

        eth_hdr->ether_type = rte_be_to_cpu_16(RTE_ETHER_TYPE_IPV6);
    }
    /* if packet wasn't IPv4 or IPv6, it's forwarded to the port it came from */

    /* 02:00:00:00:00:xx */
    d_addr_bytes = &eth_hdr->dst_addr.addr_bytes[0];
    *((uint64_t *)d_addr_bytes) = 0x000000000002 + ((uint64_t)dst_port << 40);

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

    send_single_packet(m, dst_port);
}

/* main processing loop */
static int
main_loop(__rte_unused void *dummy)
{
    struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
    unsigned lcore_id;
    uint64_t diff_tsc, cur_tsc, prev_tsc;
    int i, j, nb_rx;
    uint16_t portid;
    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;

    prev_tsc = 0;

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

    if (qconf->n_rx_queue == 0) {
        RTE_LOG(INFO, IP_RSMBL, "lcore %u has nothing to do\n", lcore_id);
        return 0;
    }

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

    for (i = 0; i < qconf->n_rx_queue; i++) {

        portid = qconf->rx_queue_list[i].portid;
        RTE_LOG(INFO, IP_RSMBL, " -- 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)) {

            /*
             * 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 ((enabled_port_mask & (1 << portid)) != 0)
                    send_burst(qconf, 1, portid);
            }

            prev_tsc = cur_tsc;
        }

        /*
         * Read packet from RX queues
         */
        for (i = 0; i < qconf->n_rx_queue; ++i) {

            portid = qconf->rx_queue_list[i].portid;

            nb_rx = rte_eth_rx_burst(portid, 0, pkts_burst,
                MAX_PKT_BURST);

            /* 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 *));
                reassemble(pkts_burst[j], portid,
                    i, qconf, cur_tsc);
            }

            /* Forward remaining prefetched packets */
            for (; j < nb_rx; j++) {
                reassemble(pkts_burst[j], portid,
                    i, qconf, cur_tsc);
            }

            rte_ip_frag_free_death_row(&qconf->death_row,
                PREFETCH_OFFSET);
        }
    }
}

/* display usage */
static void
print_usage(const char *prgname)
{
    printf("%s [EAL options] -- -p PORTMASK [-q NQ]"
        "  [--maxflows=<flows>]  [--flowttl=<ttl>[(s|ms)]]\n"
        "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
        "  -q NQ: number of RX queues per lcore\n"
        "  --maxflows=<flows>: optional, maximum number of flows "
        "supported\n"
        "  --flowttl=<ttl>[(s|ms)]: optional, maximum TTL for each "
        "flow\n",
        prgname);
}

static uint32_t
parse_flow_num(const char *str, uint32_t min, uint32_t max, uint32_t *val)
{
    char *end;
    uint64_t v;

    /* parse decimal string */
    errno = 0;
    v = strtoul(str, &end, 10);
    if (errno != 0 || *end != '\0')
        return -EINVAL;

    if (v < min || v > max)
        return -EINVAL;

    *val = (uint32_t)v;
    return 0;
}

static int
parse_flow_ttl(const char *str, uint32_t min, uint32_t max, uint32_t *val)
{
    char *end;
    uint64_t v;

    static const char frmt_sec[] = "s";
    static const char frmt_msec[] = "ms";

    /* parse decimal string */
    errno = 0;
    v = strtoul(str, &end, 10);
    if (errno != 0)
        return -EINVAL;

    if (*end != '\0') {
        if (strncmp(frmt_sec, end, sizeof(frmt_sec)) == 0)
            v *= MS_PER_S;
        else if (strncmp(frmt_msec, end, sizeof (frmt_msec)) != 0)
            return -EINVAL;
    }

    if (v < min || v > max)
        return -EINVAL;

    *val = (uint32_t)v;
    return 0;
}

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 0;

    return pm;
}

static int
parse_nqueue(const char *q_arg)
{
    char *end = NULL;
    unsigned long n;

    printf("%p\n", q_arg);

    /* parse hexadecimal string */
    n = strtoul(q_arg, &end, 10);
    if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
        return -1;
    if (n == 0)
        return -1;
    if (n >= MAX_RX_QUEUE_PER_LCORE)
        return -1;

    return n;
}

/* 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[] = {
        {"maxflows", 1, 0, 0},
        {"flowttl", 1, 0, 0},
        {NULL, 0, 0, 0}
    };

    argvopt = argv;

    while ((opt = getopt_long(argc, argvopt, "p:q:",
                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;

        /* nqueue */
        case 'q':
            rx_queue_per_lcore = parse_nqueue(optarg);
            if (rx_queue_per_lcore < 0) {
                printf("invalid queue number\n");
                print_usage(prgname);
                return -1;
            }
            break;

        /* long options */
        case 0:
            if (!strncmp(lgopts[option_index].name,
                    "maxflows", 8)) {
                if ((ret = parse_flow_num(optarg, MIN_FLOW_NUM,
                        MAX_FLOW_NUM,
                        &max_flow_num)) != 0) {
                    printf("invalid value: \"%s\" for "
                        "parameter %s\n",
                        optarg,
                        lgopts[option_index].name);
                    print_usage(prgname);
                    return ret;
                }
            }

            if (!strncmp(lgopts[option_index].name, "flowttl", 7)) {
                if ((ret = parse_flow_ttl(optarg, MIN_FLOW_TTL,
                        MAX_FLOW_TTL,
                        &max_flow_ttl)) != 0) {
                    printf("invalid value: \"%s\" for "
                        "parameter %s\n",
                        optarg,
                        lgopts[option_index].name);
                    print_usage(prgname);
                    return ret;
                }
            }

            break;

        default:
            print_usage(prgname);
            return -1;
        }
    }

    if (optind >= 0)
        argv[optind-1] = prgname;

    ret = optind-1;
    optind = 1; /* reset getopt lib */
    return ret;
}

static void
print_ethaddr(const char *name, const struct rte_ether_addr *eth_addr)
{
    char buf[RTE_ETHER_ADDR_FMT_SIZE];
    rte_ether_format_addr(buf, RTE_ETHER_ADDR_FMT_SIZE, eth_addr);
    printf("%s%s", name, buf);
}

/* Check the link status of all ports in up to 9s, and print them finally */
static void
check_all_ports_link_status(uint32_t port_mask)
{
#define CHECK_INTERVAL 100 /* 100ms */
#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
    uint16_t portid;
    uint8_t count, all_ports_up, print_flag = 0;
    struct rte_eth_link link;
    int ret;
    char link_status_text[RTE_ETH_LINK_MAX_STR_LEN];

    printf("\nChecking link status");
    fflush(stdout);
    for (count = 0; count <= MAX_CHECK_TIME; count++) {
        all_ports_up = 1;
        RTE_ETH_FOREACH_DEV(portid) {
            if ((port_mask & (1 << portid)) == 0)
                continue;
            memset(&link, 0, sizeof(link));
            ret = rte_eth_link_get_nowait(portid, &link);
            if (ret < 0) {
                all_ports_up = 0;
                if (print_flag == 1)
                    printf("Port %u link get failed: %s\n",
                        portid, rte_strerror(-ret));
                continue;
            }
            /* print link status if flag set */
            if (print_flag == 1) {
                rte_eth_link_to_str(link_status_text,
                    sizeof(link_status_text), &link);
                printf("Port %d %s\n", portid,
                       link_status_text);
                continue;
            }
            /* clear all_ports_up flag if any link down */
            if (link.link_status == RTE_ETH_LINK_DOWN) {
                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("\ndone\n");
        }
    }
}

static int
init_routing_table(void)
{
    struct rte_lpm *lpm;
    struct rte_lpm6 *lpm6;
    int socket, ret;
    unsigned i;

    for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) {
        if (socket_lpm[socket]) {
            lpm = socket_lpm[socket];
            /* populate the LPM table */
            for (i = 0; i < RTE_DIM(l3fwd_ipv4_route_array); i++) {
                ret = rte_lpm_add(lpm,
                    l3fwd_ipv4_route_array[i].ip,
                    l3fwd_ipv4_route_array[i].depth,
                    l3fwd_ipv4_route_array[i].if_out);

                if (ret < 0) {
                    RTE_LOG(ERR, IP_RSMBL, "Unable to add entry %i to the l3fwd "
                        "LPM table\n", i);
                    return -1;
                }

                RTE_LOG(INFO, IP_RSMBL, "Socket %i: adding route " IPv4_BYTES_FMT
                        "/%d (port %d)\n",
                    socket,
                    IPv4_BYTES(l3fwd_ipv4_route_array[i].ip),
                    l3fwd_ipv4_route_array[i].depth,
                    l3fwd_ipv4_route_array[i].if_out);
            }
        }

        if (socket_lpm6[socket]) {
            lpm6 = socket_lpm6[socket];
            /* populate the LPM6 table */
            for (i = 0; i < RTE_DIM(l3fwd_ipv6_route_array); i++) {
                ret = rte_lpm6_add(lpm6,
                    l3fwd_ipv6_route_array[i].ip,
                    l3fwd_ipv6_route_array[i].depth,
                    l3fwd_ipv6_route_array[i].if_out);

                if (ret < 0) {
                    RTE_LOG(ERR, IP_RSMBL, "Unable to add entry %i to the l3fwd "
                        "LPM6 table\n", i);
                    return -1;
                }

                RTE_LOG(INFO, IP_RSMBL, "Socket %i: adding route " IPv6_BYTES_FMT
                        "/%d (port %d)\n",
                    socket,
                    IPv6_BYTES(l3fwd_ipv6_route_array[i].ip),
                    l3fwd_ipv6_route_array[i].depth,
                    l3fwd_ipv6_route_array[i].if_out);
            }
        }
    }
    return 0;
}

static int
setup_port_tbl(struct lcore_queue_conf *qconf, uint32_t lcore, int socket,
    uint32_t port)
{
    struct mbuf_table *mtb;
    uint32_t n;
    size_t sz;

    n = RTE_MAX(max_flow_num, 2UL * MAX_PKT_BURST);
    sz = sizeof (*mtb) + sizeof (mtb->m_table[0]) *  n;

    if ((mtb = rte_zmalloc_socket(__func__, sz, RTE_CACHE_LINE_SIZE,
            socket)) == NULL) {
        RTE_LOG(ERR, IP_RSMBL, "%s() for lcore: %u, port: %u "
            "failed to allocate %zu bytes\n",
            __func__, lcore, port, sz);
        return -1;
    }

    mtb->len = n;
    qconf->tx_mbufs[port] = mtb;

    return 0;
}

static int
setup_queue_tbl(struct rx_queue *rxq, uint32_t lcore, uint32_t queue)
{
    int socket;
    uint32_t nb_mbuf;
    uint64_t frag_cycles;
    char buf[RTE_MEMPOOL_NAMESIZE];

    socket = rte_lcore_to_socket_id(lcore);
    if (socket == SOCKET_ID_ANY)
        socket = 0;

    /* Each table entry holds information about packet fragmentation. 8< */
    frag_cycles = (rte_get_tsc_hz() + MS_PER_S - 1) / MS_PER_S *
        max_flow_ttl;

    if ((rxq->frag_tbl = rte_ip_frag_table_create(max_flow_num,
            IP_FRAG_TBL_BUCKET_ENTRIES, max_flow_num, frag_cycles,
            socket)) == NULL) {
        RTE_LOG(ERR, IP_RSMBL, "ip_frag_tbl_create(%u) on "
            "lcore: %u for queue: %u failed\n",
            max_flow_num, lcore, queue);
        return -1;
    }
    /* >8 End of holding packet fragmentation. */

    /*
     * At any given moment up to <max_flow_num * (MAX_FRAG_NUM)>
     * mbufs could be stored in the fragment table.
     * Plus, each TX queue can hold up to <max_flow_num> packets.
     */

    /* mbufs stored in the fragment table. 8< */
    nb_mbuf = RTE_MAX(max_flow_num, 2UL * MAX_PKT_BURST) * MAX_FRAG_NUM;
    nb_mbuf *= (port_conf.rxmode.mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN
            + BUF_SIZE - 1) / BUF_SIZE;
    nb_mbuf *= 2; /* ipv4 and ipv6 */
    nb_mbuf += nb_rxd + nb_txd;

    nb_mbuf = RTE_MAX(nb_mbuf, (uint32_t)NB_MBUF);

    snprintf(buf, sizeof(buf), "mbuf_pool_%u_%u", lcore, queue);

    rxq->pool = rte_pktmbuf_pool_create(buf, nb_mbuf, MEMPOOL_CACHE_SIZE, 0,
                        MBUF_DATA_SIZE, socket);
    if (rxq->pool == NULL) {
        RTE_LOG(ERR, IP_RSMBL,
            "rte_pktmbuf_pool_create(%s) failed", buf);
        return -1;
    }
    /* >8 End of mbufs stored in the fragmentation table. */

    return 0;
}

static int
init_mem(void)
{
    char buf[PATH_MAX];
    struct rte_lpm *lpm;
    struct rte_lpm6 *lpm6;
    struct rte_lpm_config lpm_config;
    int socket;
    unsigned lcore_id;

    /* traverse through lcores and initialize structures on each socket */

    for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {

        if (rte_lcore_is_enabled(lcore_id) == 0)
            continue;

        socket = rte_lcore_to_socket_id(lcore_id);

        if (socket == SOCKET_ID_ANY)
            socket = 0;

        if (socket_lpm[socket] == NULL) {
            RTE_LOG(INFO, IP_RSMBL, "Creating LPM table on socket %i\n", socket);
            snprintf(buf, sizeof(buf), "IP_RSMBL_LPM_%i", socket);

            lpm_config.max_rules = LPM_MAX_RULES;
            lpm_config.number_tbl8s = 256;
            lpm_config.flags = 0;

            lpm = rte_lpm_create(buf, socket, &lpm_config);
            if (lpm == NULL) {
                RTE_LOG(ERR, IP_RSMBL, "Cannot create LPM table\n");
                return -1;
            }
            socket_lpm[socket] = lpm;
        }

        if (socket_lpm6[socket] == NULL) {
            RTE_LOG(INFO, IP_RSMBL, "Creating LPM6 table on socket %i\n", socket);
            snprintf(buf, sizeof(buf), "IP_RSMBL_LPM_%i", socket);

            lpm6 = rte_lpm6_create(buf, socket, &lpm6_config);
            if (lpm6 == NULL) {
                RTE_LOG(ERR, IP_RSMBL, "Cannot create LPM table\n");
                return -1;
            }
            socket_lpm6[socket] = lpm6;
        }
    }

    return 0;
}

static void
queue_dump_stat(void)
{
    uint32_t i, lcore;
    const struct lcore_queue_conf *qconf;

    for (lcore = 0; lcore < RTE_MAX_LCORE; lcore++) {
        if (rte_lcore_is_enabled(lcore) == 0)
            continue;

        qconf = &lcore_queue_conf[lcore];
        for (i = 0; i < qconf->n_rx_queue; i++) {

            fprintf(stdout, " -- lcoreid=%u portid=%u "
                "frag tbl stat:\n",
                lcore,  qconf->rx_queue_list[i].portid);
            rte_ip_frag_table_statistics_dump(stdout,
                    qconf->rx_queue_list[i].frag_tbl);
            fprintf(stdout, "TX bursts:\t%" PRIu64 "\n"
                "TX packets _queued:\t%" PRIu64 "\n"
                "TX packets dropped:\t%" PRIu64 "\n"
                "TX packets send:\t%" PRIu64 "\n",
                qconf->tx_stat.call,
                qconf->tx_stat.queue,
                qconf->tx_stat.drop,
                qconf->tx_stat.send);
        }
    }
}

static void
signal_handler(int signum)
{
    queue_dump_stat();
    if (signum != SIGUSR1)
        rte_exit(0, "received signal: %d, exiting\n", signum);
}

int
main(int argc, char **argv)
{
    struct lcore_queue_conf *qconf;
    struct rte_eth_dev_info dev_info;
    struct rte_eth_txconf *txconf;
    struct rx_queue *rxq;
    int ret, socket;
    unsigned nb_ports;
    uint16_t queueid;
    unsigned lcore_id = 0, rx_lcore_id = 0;
    uint32_t n_tx_queue, nb_lcores;
    uint16_t portid;

    /* 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 IP reassembly parameters\n");

    nb_ports = rte_eth_dev_count_avail();
    if (nb_ports == 0)
        rte_exit(EXIT_FAILURE, "No ports found!\n");

    nb_lcores = rte_lcore_count();

    /* initialize structures (mempools, lpm etc.) */
    if (init_mem() < 0)
        rte_panic("Cannot initialize memory structures!\n");

    /* check if portmask has non-existent ports */
    if (enabled_port_mask & ~(RTE_LEN2MASK(nb_ports, unsigned)))
        rte_exit(EXIT_FAILURE, "Non-existent ports in portmask!\n");

    /* initialize all ports */
    RTE_ETH_FOREACH_DEV(portid) {
        struct rte_eth_rxconf rxq_conf;
        struct rte_eth_conf local_port_conf = port_conf;

        /* skip ports that are not enabled */
        if ((enabled_port_mask & (1 << portid)) == 0) {
            printf("\nSkipping disabled port %d\n", portid);
            continue;
        }

        qconf = &lcore_queue_conf[rx_lcore_id];

        /* limit the frame size to the maximum supported by NIC */
        ret = rte_eth_dev_info_get(portid, &dev_info);
        if (ret != 0)
            rte_exit(EXIT_FAILURE,
                "Error during getting device (port %u) info: %s\n",
                portid, strerror(-ret));

        local_port_conf.rxmode.mtu = RTE_MIN(
            dev_info.max_mtu,
            local_port_conf.rxmode.mtu);

        /* get the lcore_id for this port */
        while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
               qconf->n_rx_queue == (unsigned)rx_queue_per_lcore) {

            rx_lcore_id++;
            if (rx_lcore_id >= RTE_MAX_LCORE)
                rte_exit(EXIT_FAILURE, "Not enough cores\n");

            qconf = &lcore_queue_conf[rx_lcore_id];
        }

        socket = rte_lcore_to_socket_id(portid);
        if (socket == SOCKET_ID_ANY)
            socket = 0;

        queueid = qconf->n_rx_queue;
        rxq = &qconf->rx_queue_list[queueid];
        rxq->portid = portid;
        rxq->lpm = socket_lpm[socket];
        rxq->lpm6 = socket_lpm6[socket];

        ret = rte_eth_dev_adjust_nb_rx_tx_desc(portid, &nb_rxd,
                               &nb_txd);
        if (ret < 0)
            rte_exit(EXIT_FAILURE,
                 "Cannot adjust number of descriptors: err=%d, port=%d\n",
                 ret, portid);

        if (setup_queue_tbl(rxq, rx_lcore_id, queueid) < 0)
            rte_exit(EXIT_FAILURE, "Failed to set up queue table\n");
        qconf->n_rx_queue++;

        /* init port */
        printf("Initializing port %d ... ", portid );
        fflush(stdout);

        n_tx_queue = nb_lcores;
        if (n_tx_queue > MAX_TX_QUEUE_PER_PORT)
            n_tx_queue = MAX_TX_QUEUE_PER_PORT;
        if (dev_info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE)
            local_port_conf.txmode.offloads |=
                RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;

        local_port_conf.rx_adv_conf.rss_conf.rss_hf &=
            dev_info.flow_type_rss_offloads;
        if (local_port_conf.rx_adv_conf.rss_conf.rss_hf !=
                port_conf.rx_adv_conf.rss_conf.rss_hf) {
            printf("Port %u modified RSS hash function based on hardware support,"
                "requested:%#"PRIx64" configured:%#"PRIx64"\n",
                portid,
                port_conf.rx_adv_conf.rss_conf.rss_hf,
                local_port_conf.rx_adv_conf.rss_conf.rss_hf);
        }

        ret = rte_eth_dev_configure(portid, 1, (uint16_t)n_tx_queue,
                        &local_port_conf);
        if (ret < 0) {
            printf("\n");
            rte_exit(EXIT_FAILURE, "Cannot configure device: "
                "err=%d, port=%d\n",
                ret, portid);
        }

        /* init one RX queue */
        rxq_conf = dev_info.default_rxconf;
        rxq_conf.offloads = local_port_conf.rxmode.offloads;
        ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
                         socket, &rxq_conf,
                         rxq->pool);
        if (ret < 0) {
            printf("\n");
            rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup: "
                "err=%d, port=%d\n",
                ret, portid);
        }

        ret = rte_eth_macaddr_get(portid, &ports_eth_addr[portid]);
        if (ret < 0) {
            printf("\n");
            rte_exit(EXIT_FAILURE,
                "rte_eth_macaddr_get: err=%d, port=%d\n",
                ret, portid);
        }

        print_ethaddr(" Address:", &ports_eth_addr[portid]);
        printf("\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;

            socket = (int) rte_lcore_to_socket_id(lcore_id);

            printf("txq=%u,%d,%d ", lcore_id, queueid, socket);
            fflush(stdout);

            txconf = &dev_info.default_txconf;
            txconf->offloads = local_port_conf.txmode.offloads;

            ret = rte_eth_tx_queue_setup(portid, queueid, nb_txd,
                    socket, txconf);
            if (ret < 0)
                rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup: err=%d, "
                    "port=%d\n", ret, portid);

            qconf = &lcore_queue_conf[lcore_id];
            qconf->tx_queue_id[portid] = queueid;
            setup_port_tbl(qconf, lcore_id, socket, portid);
            queueid++;
        }
        printf("\n");
    }

    printf("\n");

    /* start ports */
    RTE_ETH_FOREACH_DEV(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);

        ret = rte_eth_promiscuous_enable(portid);
        if (ret != 0)
            rte_exit(EXIT_FAILURE,
                "rte_eth_promiscuous_enable: err=%s, port=%d\n",
                rte_strerror(-ret), portid);
    }

    if (init_routing_table() < 0)
        rte_exit(EXIT_FAILURE, "Cannot init routing table\n");

    check_all_ports_link_status(enabled_port_mask);

    signal(SIGUSR1, signal_handler);
    signal(SIGTERM, signal_handler);
    signal(SIGINT, signal_handler);

    /* launch per-lcore init on every lcore */
    rte_eal_mp_remote_launch(main_loop, NULL, CALL_MAIN);
    RTE_LCORE_FOREACH_WORKER(lcore_id) {
        if (rte_eal_wait_lcore(lcore_id) < 0)
            return -1;
    }

    /* clean up the EAL */
    rte_eal_cleanup();

    return 0;
}