dpdk发送100个随机长度的报文的代码 -DPDK中文网

以下是使用DPDK发送100个随机长度报文的示例代码：

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>

#include <rte_eal.h>
#include <rte_ethdev.h>
#include <rte_mbuf.h>

#define MBUF_POOL_SIZE 8191
#define MBUF_CACHE_SIZE 250

#define MAX_PKT_SIZE 1500

static struct rte_mempool *mbuf_pool = NULL;

static bool init_dpdk(int argc, char **argv)
{
    int ret = rte_eal_init(argc, argv);
    if (ret < 0) {
        printf("Failed to initialize DPDK.\n");
        return false;
    }

    uint16_t nb_ports = rte_eth_dev_count_avail();
    if (nb_ports == 0) {
        printf("No Ethernet ports found.\n");
        return false;
    }

    for (uint16_t port_id = 0; port_id < nb_ports; port_id++) {
        struct rte_eth_conf port_conf = {};
        ret = rte_eth_dev_configure(port_id, 1, 1, &port_conf);
        if (ret != 0) {
            printf("Failed to configure Ethernet port %u.\n", port_id);
            return false;
        }

        struct rte_eth_rxconf rx_conf = {};
        ret = rte_eth_rx_queue_setup(port_id, 0, 128, SOCKET_ID_ANY, &rx_conf, mbuf_pool);
        if (ret != 0) {
            printf("Failed to setup RX queue on Ethernet port %u.\n", port_id);
            return false;
        }

        struct rte_eth_txconf tx_conf = {};
        ret = rte_eth_tx_queue_setup(port_id, 0, 128, SOCKET_ID_ANY, &tx_conf);
        if (ret != 0) {
            printf("Failed to setup TX queue on Ethernet port %u.\n", port_id);
            return false;
        }

        ret = rte_eth_dev_start(port_id);
        if (ret != 0) {
            printf("Failed to start Ethernet port %u.\n", port_id);
            return false;
        }
    }

    return true;
}

static void deinit_dpdk(void)
{
    rte_eal_cleanup();
}

int main(int argc, char **argv)
{
    srand(time(NULL));

    if (!init_dpdk(argc, argv)) {
        printf("Failed to initialize DPDK.\n");
        return EXIT_FAILURE;
    }

    mbuf_pool = rte_pktmbuf_pool_create("mbuf_pool", MBUF_POOL_SIZE, MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, SOCKET_ID_ANY);
    if (mbuf_pool == NULL) {
        printf("Failed to create packet buffer pool.\n");
        deinit_dpdk();
        return EXIT_FAILURE;
    }

    uint16_t nb_ports = rte_eth_dev_count_avail();
    uint16_t port_id = 0;

    // 循环发送 100 个报文
    for (int i = 0; i < 100; i++) {
        // 随机生成报文长度
        uint16_t pkt_len = rand() % MAX_PKT_SIZE + 1;

        // 分配内存
        struct rte_mbuf *pkt_buf = rte_pktmbuf_alloc(mbuf_pool);
        if (pkt_buf == NULL) {
            printf("Failed to allocate packet buffer.\n");
            continue;
        }

        // 填充随机数据
        uint8_t *pkt_data = rte_pktmbuf_mtod(pkt_buf, uint8_t *);
        for (int j = 0; j < pkt_len; j++) {
            pkt_data[j] = rand() % 256;
        }

        // 发送报文
        int sent = rte_eth_tx_burst(port_id, 0, &pkt_buf, 1);
        if (sent != 1) {
            printf("Failed to send packet.\n");
            rte_pktmbuf_free(pkt_buf);
            continue;
        }
    }

    deinit_dpdk();

    return EXIT_SUCCESS;
}

此示例代码使用了DPDK的数据包分配、填充和发送函数，以及DPDK的环境初始化和清理函数。请注意，此代码仅用于演示目的，并且可能需要根据您的实际情况进行修改。