dpdk 22.11版本中，如何实现同一网卡不同网口（在一个物理机器上）的带序号的数据包的转发与接收，最后进行比较，查看数据包的顺序是否正确给出具体代码-DPDK中文网

以下是一个简单的示例代码，展示了如何使用DPDK 22.11版本实现同一网卡不同网口的带序号数据包转发和接收，并比较数据包的顺序是否正确。注意：此代码仅供参考，实际应用中需要根据具体情况进行修改和优化。

”`c #include #include #include #include #include #include #include #include #include #include #include #include

#define RX_RING_SIZE 128 #define TX_RING_SIZE 512 #define NUM_MBUFS 8191 #define MBUF_CACHE_SIZE 250 #define BURST_SIZE 32 #define PORT_ID 0 #define NUM_PORTS 2

static const struct rte_eth_conf port_conf_default = {

.rxmode = {
    .max_rx_pkt_len = ETHER_MAX_LEN,
},
.txmode = {
    .mq_mode = ETH_MQ_TX_NONE,
},

};

static struct rte_mempool *mbuf_pool;

static void send_packet(struct rte_mbuf *pkt, uint16_t port_id, uint16_t queue_id) {

uint16_t nb_tx;

nb_tx = rte_eth_tx_burst(port_id, queue_id, &pkt, 1);
if (nb_tx == 0) {
    rte_pktmbuf_free(pkt);
}

}

static void receive_packets(uint16_t port_id, uint16_t queue_id, uint32_t seq_num[]) {

struct rte_mbuf *pkts_burst[BURST_SIZE];
uint16_t nb_rx, i;
uint32_t pkt_seq_num;

nb_rx = rte_eth_rx_burst(port_id, queue_id, pkts_burst, BURST_SIZE);
for (i = 0; i < nb_rx; i++) {
    pkt_seq_num = rte_be_to_cpu_32(*(uint32_t *)(rte_pktmbuf_mtod(pkts_burst[i], void *) + sizeof(struct ether_hdr)));
    printf("Received packet with seq num %" PRIu32 "\n", pkt_seq_num);
    if (pkt_seq_num < NUM_MBUFS) {
        seq_num[pkt_seq_num]++;
    }
    rte_pktmbuf_free(pkts_burst[i]);
}

}

int main(int argc, char *argv[]) {

int ret;
uint16_t port_id, queue_id;
struct rte_eth_dev_info dev_info;
uint32_t seq_num[NUM_MBUFS] = {0};

ret = rte_eal_init(argc, argv);
if (ret < 0) {
    rte_exit(EXIT_FAILURE, "Error: rte_eal_init() failed\n");
}
argc -= ret;
argv += ret;

if (rte_eth_dev_count_avail() < NUM_PORTS) {
    rte_exit(EXIT_FAILURE, "Error: not enough Ethernet ports available\n");
}

mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS * NUM_PORTS, MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
if (mbuf_pool == NULL) {
    rte_exit(EXIT_FAILURE, "Error: rte_pktmbuf_pool_create() failed\n");
}

port_id = PORT_ID;
queue_id = 0;

ret = rte_eth_dev_configure(port_id, 1, 1, &port_conf_default);
if (ret < 0) {
    rte_exit(EXIT_FAILURE, "Error: rte_eth_dev_configure() failed\n");
}

rte_eth_dev_info_get(port_id, &dev_info);
if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE) {
    port_conf_default.txmode.offloads |= DEV_TX_OFFLOAD_MBUF_FAST_FREE;
}

ret = rte_eth_tx_queue_setup(port_id, queue_id, TX_RING_SIZE, rte_eth_dev_socket_id(port_id), NULL);
if (ret < 0) {
    rte_exit(EXIT_FAILURE, "Error: rte_eth_tx_queue_setup() failed\n");
}

ret = rte_eth_rx_queue_setup(port_id, queue_id, RX_RING_SIZE, rte_eth_dev_socket_id(port_id), NULL, mbuf_pool);
if (ret < 0) {
    rte_exit(EXIT_FAILURE, "Error: rte_eth_rx_queue_setup() failed\n");
}

ret = rte_eth_dev_start(port_id);
if (ret <