dpdk使用c语言，编写arp老化代码-DPDK中文网

以下是一个简单的DPDK ARP老化代码示例，使用C语言编写：

#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
#include <rte_eal.h>
#include <rte_common.h>
#include <rte_ethdev.h>
#include <rte_arp.h>

#define BURST_SIZE 32

static volatile bool quit_signal;

static void signal_handler(int signum) {
    if (signum == SIGINT || signum == SIGTERM) {
        printf("\nSignal %d received, preparing to exit...\n", signum);
        quit_signal = true;
    }
}

int main(int argc, char *argv[]) {
    int ret;
    uint16_t nb_ports;
    struct rte_mempool *mbuf_pool;
    struct rte_eth_conf port_conf = {
        .rxmode = {
            .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
            .split_hdr_size = 0,
            .offloads = DEV_RX_OFFLOAD_CHECKSUM,
        },
        .txmode = {
            .offloads = DEV_TX_OFFLOAD_IPV4_CKSUM,
        },
    };
    struct rte_eth_txconf tx_conf = {
        .offloads = DEV_TX_OFFLOAD_IPV4_CKSUM,
    };

    ret = rte_eal_init(argc, argv);
    if (ret < 0)
        rte_exit(EXIT_FAILURE, "Error initializing DPDK EAL\n");

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

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

    mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", 8192,
            BURST_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
    if (mbuf_pool == NULL)
        rte_exit(EXIT_FAILURE, "Error creating mbuf pool\n");

    for (int i = 0; i < nb_ports; i++) {
        ret = rte_eth_dev_configure(i, 1, 1, &port_conf);
        if (ret < 0)
            rte_exit(EXIT_FAILURE, "Error configuring port %d\n", i);

        ret = rte_eth_rx_queue_setup(i, 0, BURST_SIZE,
                rte_eth_dev_socket_id(i), NULL, mbuf_pool);
        if (ret < 0)
            rte_exit(EXIT_FAILURE, "Error setting up RX queue for port %d\n", i);

        ret = rte_eth_tx_queue_setup(i, 0, BURST_SIZE,
                rte_eth_dev_socket_id(i), &tx_conf);
        if (ret < 0)
            rte_exit(EXIT_FAILURE, "Error setting up TX queue for port %d\n", i);

        ret = rte_eth_dev_start(i);
        if (ret < 0)
            rte_exit(EXIT_FAILURE, "Error starting port %d\n", i);

        rte_eth_promiscuous_enable(i);
    }

    printf("ARP aging started...\n");
    while (!quit_signal) {
        rte_delay_ms(1000);
        for (int i = 0; i < nb_ports; i++) {
            struct rte_arp_stats stats;
            memset(&stats, 0, sizeof(stats));
            rte_eth_dev_filter_ctrl(i, RTE_ETH_FILTER_ARP,
                    RTE_ETH_FILTER_GET_STATS, &stats);

            printf("Port %d ARP old_entry_count=%"PRIu64"\n",
                    i, stats.old_entry_count);

            rte_eth_dev_filter_ctrl(i, RTE_ETH_FILTER_ARP,
                    RTE_ETH_FILTER_FLUSH, NULL);
        }
    }

    for (int i = 0; i < nb_ports; i++) {
        rte_eth_dev_stop(i);
        rte_eth_dev_close(i);
    }

    printf("ARP aging stopped.\n");
    return 0;
}

该示例代码使用DPDK库来创建并配置一个或多个Ethernet端口，并在循环中执行ARP老化处理。在每个循环迭代中，它将获取每个端口的ARP统计信息（包括旧条目计数），然后刷新ARP缓存，以使其开始进行新的ARP老化。

要使用此代码，请按照以下步骤操作：