flow_ct_udp_query_sample.c

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/*
 * Copyright (c) 2024 NVIDIA CORPORATION AND AFFILIATES.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright notice, this list of
 *       conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the NVIDIA CORPORATION nor the names of its contributors may be used
 *       to endorse or promote products derived from this software without specific prior written
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NVIDIA CORPORATION BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TOR (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
 
#include <unistd.h>
 
#include <rte_ethdev.h>
 
#include <doca_log.h>
#include <doca_flow.h>
#include <doca_flow_ct.h>
 
#include "flow_ct_common.h"
#include "flow_common.h"
 
#define PACKET_BURST 128
 
#define DEFAULT_UDP_DELAY_S 2
#define DEFAULT_CNT_QUERY_INTERVAL 1
 
DOCA_LOG_REGISTER(FLOW_CT_UDP);
 
/*
 * Create RSS pipe
 *
 * @port [in]: Pipe port
 * @status [in]: User context for adding entry
 * @pipe [out]: Created pipe pointer
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t create_rss_pipe(struct doca_flow_port *port,
                    struct entries_status *status,
                    struct doca_flow_pipe **pipe)
{
    struct doca_flow_match match;
    struct doca_flow_pipe_cfg *cfg;
    struct doca_flow_fwd fwd;
    uint16_t rss_queues[1];
    doca_error_t result;
 
    memset(&match, 0, sizeof(match));
    memset(&fwd, 0, sizeof(fwd));
 
    result = doca_flow_pipe_cfg_create(&cfg, port);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = set_flow_pipe_cfg(cfg, "RSS_PIPE", DOCA_FLOW_PIPE_BASIC, false);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_match(cfg, &match, NULL);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg match: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
 
    /* RSS queue - send matched traffic to queue 0  */
    rss_queues[0] = 0;
    fwd.type = DOCA_FLOW_FWD_RSS;
    fwd.rss_type = DOCA_FLOW_RESOURCE_TYPE_NON_SHARED;
    fwd.rss.queues_array = rss_queues;
    fwd.rss.outer_flags = DOCA_FLOW_RSS_IPV4 | DOCA_FLOW_RSS_UDP;
    fwd.rss.nr_queues = 1;
 
    result = doca_flow_pipe_create(cfg, &fwd, NULL, pipe);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create RSS pipe: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    doca_flow_pipe_cfg_destroy(cfg);
 
    /* Match on any packet */
    result = doca_flow_pipe_add_entry(0, *pipe, &match, NULL, NULL, &fwd, 0, status, NULL);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to add RSS pipe entry: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = doca_flow_entries_process(port, 0, DEFAULT_TIMEOUT_US, 0);
    if (result != DOCA_SUCCESS)
        DOCA_LOG_ERR("Failed to process RSS entry: %s", doca_error_get_descr(result));
 
    return result;
 
destroy_pipe_cfg:
    doca_flow_pipe_cfg_destroy(cfg);
    return result;
}
 
/*
 * Create CT pipe
 *
 * @port [in]: Pipe port
 * @fwd_pipe [in]: Forward pipe pointer
 * @fwd_miss_pipe [in]: Forward miss pipe pointer
 * @pipe [out]: Created pipe pointer
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t create_ct_pipe(struct doca_flow_port *port,
                   struct doca_flow_pipe *fwd_pipe,
                   struct doca_flow_pipe *fwd_miss_pipe,
                   struct doca_flow_pipe **pipe)
{
    struct doca_flow_match match;
    struct doca_flow_match mask;
    struct doca_flow_pipe_cfg *cfg;
    struct doca_flow_fwd fwd;
    struct doca_flow_fwd fwd_miss;
    doca_error_t result;
 
    memset(&match, 0, sizeof(match));
    memset(&mask, 0, sizeof(mask));
    memset(&fwd, 0, sizeof(fwd));
    memset(&fwd_miss, 0, sizeof(fwd));
 
    result = doca_flow_pipe_cfg_create(&cfg, port);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = set_flow_pipe_cfg(cfg, "CT_PIPE", DOCA_FLOW_PIPE_CT, false);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_match(cfg, &match, &mask);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg match: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
 
    fwd.type = DOCA_FLOW_FWD_PIPE;
    fwd.next_pipe = fwd_pipe;
 
    fwd_miss.type = DOCA_FLOW_FWD_PIPE;
    fwd_miss.next_pipe = fwd_miss_pipe;
 
    result = doca_flow_pipe_create(cfg, &fwd, &fwd_miss, pipe);
    if (result != DOCA_SUCCESS)
        DOCA_LOG_ERR("Failed to add CT pipe: %s", doca_error_get_descr(result));
destroy_pipe_cfg:
    doca_flow_pipe_cfg_destroy(cfg);
    return result;
}
 
/*
 * Create VxLAN encapsulation pipe
 *
 * @port [in]: Pipe port
 * @port_id [in]: Forward port ID
 * @status [in]: User context for adding entry
 * @pipe [out]: Created pipe pointer
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t create_vxlan_encap_pipe(struct doca_flow_port *port,
                        int port_id,
                        struct entries_status *status,
                        struct doca_flow_pipe **pipe)
{
    struct doca_flow_match match;
    struct doca_flow_actions actions;
    struct doca_flow_actions *actions_list[] = {&actions};
    struct doca_flow_fwd fwd;
    struct doca_flow_pipe_cfg *pipe_cfg;
    uint8_t src_mac[] = {0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff};
    uint8_t dst_mac[] = {0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
    doca_error_t result;
 
    memset(&match, 0, sizeof(match));
    memset(&actions, 0, sizeof(actions));
    memset(&fwd, 0, sizeof(fwd));
 
    SET_MAC_ADDR(actions.encap_cfg.encap.outer.eth.src_mac, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff);
    SET_MAC_ADDR(actions.encap_cfg.encap.outer.eth.dst_mac, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff);
    actions.encap_cfg.encap.outer.l3_type = DOCA_FLOW_L3_TYPE_IP4;
    actions.encap_cfg.encap.outer.ip4.src_ip = 0xffffffff;
    actions.encap_cfg.encap.outer.ip4.dst_ip = 0xffffffff;
    actions.encap_cfg.encap.outer.ip4.ttl = 0xff;
    actions.encap_cfg.encap.outer.l4_type_ext = DOCA_FLOW_L4_TYPE_EXT_UDP;
    actions.encap_cfg.encap.outer.udp.l4_port.dst_port = RTE_BE16(DOCA_FLOW_VXLAN_DEFAULT_PORT);
    actions.encap_cfg.encap.tun.type = DOCA_FLOW_TUN_VXLAN;
    actions.encap_cfg.encap.tun.vxlan_tun_id = 0xffffffff;
    actions.encap_type = DOCA_FLOW_RESOURCE_TYPE_NON_SHARED;
    actions.encap_cfg.is_l2 = true;
 
    result = doca_flow_pipe_cfg_create(&pipe_cfg, port);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = set_flow_pipe_cfg(pipe_cfg, "VXLAN_ENCAP_PIPE", DOCA_FLOW_PIPE_BASIC, true);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_domain(pipe_cfg, DOCA_FLOW_PIPE_DOMAIN_EGRESS);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg domain: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_match(pipe_cfg, &match, NULL);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg match: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_actions(pipe_cfg, actions_list, NULL, NULL, 1);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg actions: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
 
    fwd.type = DOCA_FLOW_FWD_PORT;
    fwd.port_id = port_id;
 
    result = doca_flow_pipe_create(pipe_cfg, &fwd, NULL, pipe);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create VxLAN Encap pipe: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    doca_flow_pipe_cfg_destroy(pipe_cfg);
 
    memset(&actions, 0, sizeof(actions));
    SET_MAC_ADDR(actions.encap_cfg.encap.outer.eth.src_mac,
             src_mac[0],
             src_mac[1],
             src_mac[2],
             src_mac[3],
             src_mac[4],
             src_mac[5]);
    SET_MAC_ADDR(actions.encap_cfg.encap.outer.eth.dst_mac,
             dst_mac[0],
             dst_mac[1],
             dst_mac[2],
             dst_mac[3],
             dst_mac[4],
             dst_mac[5]);
    actions.encap_cfg.encap.outer.ip4.src_ip = BE_IPV4_ADDR(11, 21, 31, 41);
    actions.encap_cfg.encap.outer.ip4.dst_ip = BE_IPV4_ADDR(81, 81, 81, 81);
    actions.encap_cfg.encap.outer.ip4.ttl = 17;
    actions.encap_cfg.encap.tun.vxlan_tun_id = DOCA_HTOBE32(0xadadad);
    actions.action_idx = 0;
 
    result = doca_flow_pipe_add_entry(0, *pipe, &match, &actions, NULL, NULL, 0, status, NULL);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to add VxLAN Encap pipe entry: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = doca_flow_entries_process(port, 0, DEFAULT_TIMEOUT_US, 0);
    if (result != DOCA_SUCCESS)
        DOCA_LOG_ERR("Failed to process UDP entry: %s", doca_error_get_descr(result));
 
    return result;
 
destroy_pipe_cfg:
    doca_flow_pipe_cfg_destroy(pipe_cfg);
    return result;
}
 
/*
 * Create pipe to count packets based on 5 tuple match
 *
 * @port [in]: Pipe port
 * @fwd_pipe [in]: Next pipe pointer
 * @status [in]: User context for adding entry
 * @pipe [out]: Created pipe pointer
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t create_count_pipe(struct doca_flow_port *port,
                      struct doca_flow_pipe *fwd_pipe,
                      struct entries_status *status,
                      struct doca_flow_pipe **pipe)
{
    struct doca_flow_match match;
    struct doca_flow_monitor monitor;
    struct doca_flow_fwd fwd;
    struct doca_flow_fwd fwd_miss;
    struct doca_flow_pipe_cfg *pipe_cfg;
    doca_error_t result;
 
    memset(&match, 0, sizeof(match));
    memset(&monitor, 0, sizeof(monitor));
    memset(&fwd, 0, sizeof(fwd));
    memset(&fwd_miss, 0, sizeof(fwd_miss));
 
    /* 5 tuple match */
    match.parser_meta.outer_l4_type = DOCA_FLOW_L4_META_UDP;
    match.parser_meta.outer_l3_type = DOCA_FLOW_L3_META_IPV4;
    match.outer.l4_type_ext = DOCA_FLOW_L4_TYPE_EXT_UDP;
    match.outer.l3_type = DOCA_FLOW_L3_TYPE_IP4;
    match.outer.ip4.src_ip = 0xffffffff;
    match.outer.ip4.dst_ip = 0xffffffff;
    match.outer.udp.l4_port.src_port = 0xffff;
    match.outer.udp.l4_port.dst_port = 0xffff;
 
    monitor.counter_type = DOCA_FLOW_RESOURCE_TYPE_NON_SHARED;
 
    result = doca_flow_pipe_cfg_create(&pipe_cfg, port);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = set_flow_pipe_cfg(pipe_cfg, "COUNT_PIPE", DOCA_FLOW_PIPE_BASIC, false);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_match(pipe_cfg, &match, NULL);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg match: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    result = doca_flow_pipe_cfg_set_monitor(pipe_cfg, &monitor);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to set doca_flow_pipe_cfg monitor: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
 
    fwd.type = DOCA_FLOW_FWD_PIPE;
    fwd.next_pipe = fwd_pipe;
 
    fwd_miss.type = DOCA_FLOW_FWD_PIPE;
    fwd_miss.next_pipe = fwd_pipe;
 
    result = doca_flow_pipe_create(pipe_cfg, &fwd, &fwd_miss, pipe);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to create count pipe: %s", doca_error_get_descr(result));
        goto destroy_pipe_cfg;
    }
    doca_flow_pipe_cfg_destroy(pipe_cfg);
 
    memset(&match, 0, sizeof(match));
    match.outer.ip4.dst_ip = BE_IPV4_ADDR(8, 8, 8, 8);
    match.outer.ip4.src_ip = BE_IPV4_ADDR(1, 2, 3, 4);
    match.outer.udp.l4_port.dst_port = rte_cpu_to_be_16(80);
    match.outer.udp.l4_port.src_port = rte_cpu_to_be_16(1234);
 
    result = doca_flow_pipe_add_entry(0, *pipe, &match, NULL, NULL, NULL, 0, status, NULL);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to add count pipe entry: %s", doca_error_get_descr(result));
        return result;
    }
 
    result = doca_flow_entries_process(port, 0, DEFAULT_TIMEOUT_US, 0);
    if (result != DOCA_SUCCESS)
        DOCA_LOG_ERR("Failed to process count entry: %s", doca_error_get_descr(result));
 
    return result;
 
destroy_pipe_cfg:
    doca_flow_pipe_cfg_destroy(pipe_cfg);
    return result;
}
 
/*
 * Parse UDP packet to update CT tables
 *
 * @packet [in]: Packet to parse
 * @match_o [out]: Origin match struct to fill
 * @match_r [out]: Reply match struct to fill
 */
static void parse_packet(struct rte_mbuf *packet,
             struct doca_flow_ct_match *match_o,
             struct doca_flow_ct_match *match_r)
{
    uint8_t *l4_hdr;
    struct rte_ipv4_hdr *ipv4_hdr;
    const struct rte_udp_hdr *udp_hdr;
 
    ipv4_hdr = rte_pktmbuf_mtod_offset(packet, struct rte_ipv4_hdr *, sizeof(struct rte_ether_hdr));
 
    match_o->ipv4.src_ip = ipv4_hdr->src_addr;
    match_o->ipv4.dst_ip = ipv4_hdr->dst_addr;
    match_r->ipv4.src_ip = match_o->ipv4.dst_ip;
    match_r->ipv4.dst_ip = match_o->ipv4.src_ip;
 
    l4_hdr = (typeof(l4_hdr))ipv4_hdr + rte_ipv4_hdr_len(ipv4_hdr);
    udp_hdr = (typeof(udp_hdr))l4_hdr;
 
    match_o->ipv4.l4_port.src_port = udp_hdr->src_port;
    match_o->ipv4.l4_port.dst_port = udp_hdr->dst_port;
    match_r->ipv4.l4_port.src_port = match_o->ipv4.l4_port.dst_port;
    match_r->ipv4.l4_port.dst_port = match_o->ipv4.l4_port.src_port;
 
    match_o->ipv4.next_proto = DOCA_FLOW_PROTO_UDP;
    match_r->ipv4.next_proto = DOCA_FLOW_PROTO_UDP;
}
 
/*
 * Dequeue packets from DPDK queues, parse and update CT tables with new connection 5 tuple
 *
 * @port [in]: Port id to which an entry should be inserted
 * @ct_queue [in]: DOCA Flow CT queue number
 * @ct_status [in]: User context for adding CT entry
 * @entry [out]: CT entry to create
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
static doca_error_t process_packets(struct doca_flow_port *port,
                    uint16_t ct_queue,
                    struct entries_status *ct_status,
                    struct doca_flow_pipe_entry **entry)
{
    struct rte_mbuf *packets[PACKET_BURST];
    struct doca_flow_ct_match match_o;
    struct doca_flow_ct_match match_r;
    uint32_t flags;
    doca_error_t result;
    int i, entries, nb_packets = 0;
    bool conn_found = false;
 
    memset(&match_o, 0, sizeof(match_o));
    memset(&match_r, 0, sizeof(match_r));
 
    nb_packets = rte_eth_rx_burst(0, 0, packets, PACKET_BURST);
    if (nb_packets == 0) {
        DOCA_LOG_INFO("Sample didn't receive packets to process");
        return DOCA_ERROR_BAD_STATE;
    }
 
    entries = 0;
    DOCA_LOG_INFO("Sample received %d packets", nb_packets);
    for (i = 0; i < PACKET_BURST && i < nb_packets; i++) {
        parse_packet(packets[i], &match_o, &match_r);
        flags = DOCA_FLOW_CT_ENTRY_FLAGS_ALLOC_ON_MISS | DOCA_FLOW_CT_ENTRY_FLAGS_DUP_FILTER_ORIGIN |
            DOCA_FLOW_CT_ENTRY_FLAGS_DUP_FILTER_REPLY;
        /* Allocate CT entry */
        result = doca_flow_ct_entry_prepare(ct_queue,
                            NULL,
                            flags,
                            &match_o,
                            packets[i]->hash.rss,
                            &match_r,
                            packets[i]->hash.rss,
                            entry,
                            &conn_found);
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to prepare CT entry\n");
            return result;
        }
 
        if (!conn_found) {
            flags = DOCA_FLOW_CT_ENTRY_FLAGS_NO_WAIT | DOCA_FLOW_CT_ENTRY_FLAGS_DIR_ORIGIN |
                DOCA_FLOW_CT_ENTRY_FLAGS_COUNTER_ORIGIN | DOCA_FLOW_CT_ENTRY_FLAGS_COUNTER_REPLY;
            result = doca_flow_ct_add_entry(ct_queue,
                            NULL,
                            flags,
                            &match_o,
                            &match_r,
                            NULL,
                            NULL,
                            0,
                            0,
                            0,
                            ct_status,
                            *entry);
            if (result != DOCA_SUCCESS) {
                DOCA_LOG_ERR("Failed to add CT pipe an entry: %s", doca_error_get_descr(result));
                return result;
            }
            entries++;
        }
    }
 
    while (ct_status->nb_processed != entries) {
        result = doca_flow_ct_entries_process(port, ct_queue, 0, 0, NULL);
        if (result != DOCA_SUCCESS) {
            DOCA_LOG_ERR("Failed to process Flow CT entries: %s", doca_error_get_descr(result));
            return result;
        }
 
        if (ct_status->failure) {
            DOCA_LOG_ERR("Flow CT entries process returned with a failure");
            return DOCA_ERROR_BAD_STATE;
        }
    }
 
    return DOCA_SUCCESS;
}
 
/*
 * Run flow_ct_udp_query sample
 *
 * @nb_queues [in]: number of queues the sample will use
 * @ct_dev [in]: Flow CT device
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise.
 */
doca_error_t flow_ct_udp_query(uint16_t nb_queues, struct doca_dev *ct_dev)
{
    const int nb_ports = 2, nb_entries = 6;
    struct flow_resources resource;
    uint32_t nr_shared_resources[SHARED_RESOURCE_NUM_VALUES] = {0};
    struct doca_flow_pipe_entry *ct_entry;
    struct doca_flow_pipe *rss_pipe, *encap_pipe, *count_pipe, *ct_pipe = NULL, *udp_pipe;
    struct doca_flow_port *ports[nb_ports];
    struct doca_flow_meta o_zone_mask, o_modify_mask, r_zone_mask, r_modify_mask;
    struct doca_flow_resource_query query_o, query_r;
    struct doca_dev *dev_arr[nb_ports];
    uint32_t actions_mem_size[nb_ports];
    struct entries_status ctrl_status, ct_status;
    uint64_t last_hit_s = 0;
    uint32_t ct_flags, nb_arm_queues = 1, nb_ctrl_queues = 1, nb_user_actions = 0, nb_ipv4_sessions = 1024,
               nb_ipv6_sessions = 0; /* On BF2 should always be 0 */
    uint16_t ct_queue = nb_queues;
    doca_error_t result;
    FILE *fd;
 
    memset(&ctrl_status, 0, sizeof(ctrl_status));
    memset(&ct_status, 0, sizeof(ct_status));
    memset(&resource, 0, sizeof(resource));
 
    resource.nr_counters = 1;
 
    result = init_doca_flow(nb_queues, "switch,hws", &resource, nr_shared_resources);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init DOCA Flow: %s", doca_error_get_descr(result));
        return result;
    }
 
    /* Dont use zone masking */
    memset(&o_zone_mask, 0, sizeof(o_zone_mask));
    memset(&o_modify_mask, 0, sizeof(o_modify_mask));
    memset(&r_zone_mask, 0, sizeof(r_zone_mask));
    memset(&r_modify_mask, 0, sizeof(r_modify_mask));
 
    ct_flags = DOCA_FLOW_CT_FLAG_NO_AGING;
    result = init_doca_flow_ct(ct_flags,
                   nb_arm_queues,
                   nb_ctrl_queues,
                   nb_user_actions,
                   NULL,
                   nb_ipv4_sessions,
                   nb_ipv6_sessions,
                   DUP_FILTER_CONN_NUM,
                   false,
                   &o_zone_mask,
                   &o_modify_mask,
                   false,
                   &r_zone_mask,
                   &r_modify_mask);
    if (result != DOCA_SUCCESS) {
        doca_flow_destroy();
        return result;
    }
 
    memset(dev_arr, 0, sizeof(struct doca_dev *) * nb_ports);
    dev_arr[0] = ct_dev;
    ARRAY_INIT(actions_mem_size, ACTIONS_MEM_SIZE(nb_queues, nb_entries));
    result = init_doca_flow_ports(nb_ports, ports, false, dev_arr, actions_mem_size);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init DOCA ports: %s", doca_error_get_descr(result));
        doca_flow_ct_destroy();
        doca_flow_destroy();
        return result;
    }
 
    result = create_rss_pipe(ports[0], &ctrl_status, &rss_pipe);
    if (result != DOCA_SUCCESS)
        goto cleanup;
 
    result = create_vxlan_encap_pipe(ports[0], 0, &ctrl_status, &encap_pipe);
    if (result != DOCA_SUCCESS)
        goto cleanup;
 
    result = create_count_pipe(ports[0], rss_pipe, &ctrl_status, &count_pipe);
    if (result != DOCA_SUCCESS)
        goto cleanup;
 
    result = create_ct_pipe(ports[0], encap_pipe, count_pipe, &ct_pipe);
    if (result != DOCA_SUCCESS)
        goto cleanup;
 
    result = create_ct_root_pipe(ports[0], true, false, DOCA_FLOW_L4_META_UDP, ct_pipe, &ctrl_status, &udp_pipe);
    if (result != DOCA_SUCCESS)
        goto cleanup;
 
    if (ctrl_status.nb_processed != nb_entries || ctrl_status.failure) {
        DOCA_LOG_ERR("Failed to process control path entries");
        result = DOCA_ERROR_BAD_STATE;
        goto cleanup;
    }
 
    DOCA_LOG_INFO("Wait few seconds for packets to arrive");
    sleep(5);
 
    result = process_packets(ports[0], ct_queue, &ct_status, &ct_entry);
    if (result != DOCA_SUCCESS)
        goto cleanup;
 
    sleep(DEFAULT_UDP_DELAY_S + DEFAULT_CNT_QUERY_INTERVAL);
 
    DOCA_LOG_INFO("Same UDP packet should be resent");
    sleep(5);
 
    fd = fopen("port_0_info.txt", "w");
    if (fd == NULL) {
        DOCA_LOG_ERR("Failed to open the file");
        result = DOCA_ERROR_IO_FAILED;
        goto cleanup;
    }
 
    /* dump port 0 info to a file */
    doca_flow_port_pipes_dump(ports[0], fd);
    fclose(fd);
 
    result = doca_flow_ct_query_entry(ct_queue,
                      ct_pipe,
                      DOCA_FLOW_CT_ENTRY_FLAGS_NO_WAIT,
                      ct_entry,
                      &query_o,
                      &query_r,
                      &last_hit_s);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to query CT entry: %s", doca_error_get_descr(result));
        goto cleanup;
    }
 
    DOCA_LOG_INFO("Port 0:");
    DOCA_LOG_INFO("Origin Total bytes: %ld", query_o.counter.total_bytes);
    DOCA_LOG_INFO("Origin Total packets: %ld", query_o.counter.total_pkts);
    DOCA_LOG_INFO("Reply Total bytes: %ld", query_r.counter.total_bytes);
    DOCA_LOG_INFO("Reply Total packets: %ld", query_r.counter.total_pkts);
    DOCA_LOG_INFO("Last hit since Epoch (sec) : %ld", last_hit_s);
 
cleanup:
    cleanup_procedure(ct_pipe, nb_ports, ports);
    return result;
}