dpdk发送mbuf中的所有包的代码-DPDK中文网

以下是使用DPDK发送mbuf中的所有包的示例代码：

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

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

#define TX_RING_SIZE 512

int main(int argc, char **argv)
{
    int ret;
    uint16_t port_id = 0; // 使用第一个网络接口
    struct rte_mempool *mbuf_pool;
    struct rte_eth_conf port_conf = {
        .rxmode = {
            .max_rx_pkt_len = RTE_ETHER_MAX_LEN,
            .split_hdr_size = 0,
            .header_split   = 0, /**< Header Split disabled */
            .hw_ip_checksum = 1, /**< IP checksum offload enabled */
            .hw_vlan_filter = 0, /**< VLAN filtering disabled */
            .jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
            .hw_strip_crc   = 1, /**< CRC stripping by hardware enabled */
        },
        .txmode = {
            .mq_mode        = ETH_MQ_TX_NONE,
        },
    };
    struct rte_eth_txconf tx_conf;

    ret = rte_eal_init(argc, argv);
    if (ret < 0) {
        rte_exit(EXIT_FAILURE, "Failed to initialize EAL.\n");
    }

    mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", TX_RING_SIZE * 2,
                                        RTE_CACHE_LINE_SIZE, 0,
                                        RTE_MBUF_DEFAULT_BUF_SIZE,
                                        rte_socket_id());
    if (!mbuf_pool) {
        rte_exit(EXIT_FAILURE, "Failed to create packet mbuf pool.\n");
    }

    ret = rte_eth_dev_configure(port_id, /* nb_ports */1,
                                 /* nb_rx_queue */0,
                                 /* nb_tx_queue */1, &port_conf);
    if (ret < 0) {
        rte_exit(EXIT_FAILURE, "Failed to configure ethernet device.\n");
    }

    ret = rte_eth_tx_queue_setup(port_id, /* queue id */0,
                                  TX_RING_SIZE, rte_socket_id(), &tx_conf);
    if (ret < 0) {
        rte_exit(EXIT_FAILURE, "Failed to setup transmit queue.\n");
    }

    ret = rte_eth_dev_start(port_id);
    if (ret < 0) {
        rte_exit(EXIT_FAILURE, "Failed to start ethernet device.\n");
    }

    struct rte_mbuf *mbuf;
    
    while ((mbuf = get_next_packet_from_mbuf_pool())) { // 从mbuf池中获取下一个包
        uint16_t nb_tx;
        nb_tx = rte_eth_tx_burst(port_id, /* queue id */0, &mbuf, /* nb pkts */1);

        if (nb_tx != 1) {
            printf("Warning: Failed to send packet.\n");
            rte_pktmbuf_free(mbuf); // 如果发送失败，则释放该mbuf
        }
    }

    return 0;
}

此示例代码从一个MBUF池中获取每个报文，并使用DPDK将其发送出去。如果发送失败，它会释放MBUF以避免内存泄漏。您需要根据自己的应用程序逻辑修改get_next_packet_from_mbuf_pool()函数以从MBUF池中获取下一个报文。