/* 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;
}