linux驱动在哪里校验mac

#include <linux/module.h>
#include <linux/netdevice.h>

static int my_netdev_rx(struct sk_buff *skb, struct net_device *dev) {
    struct ethhdr *eth = eth_hdr(skb);

    // 校验源MAC地址
    if (memcmp(eth->h_source, dev->dev_addr, ETH_ALEN) != 0) {
        printk(KERN_ERR "Invalid source MAC address\n");
        kfree_skb(skb);
        return NET_RX_DROP;
    }

    // 校验目标MAC地址
    if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN) != 0) {
        printk(KERN_ERR "Invalid destination MAC address\n");
        kfree_skb(skb);
        return NET_RX_DROP;
    }

    // 处理合法的数据包
    return NET_RX_SUCCESS;
}

static struct net_device_ops my_netdev_ops = {
    .ndo_start_xmit = my_netdev_start_xmit,
    .ndo_rx_handler = my_netdev_rx,
};

static int __init my_netdev_init(void) {
    struct net_device *dev;

    dev = alloc_netdev(0, "my_netdev", NET_NAME_UNKNOWN, ether_setup);
    if (!dev)
        return -ENOMEM;

    dev->netdev_ops = &my_netdev_ops;
    memcpy(dev->dev_addr, "\x00\x11\x22\x33\x44\x55", ETH_ALEN);

    register_netdev(dev);
    return 0;
}

static void __exit my_netdev_exit(void) {
    unregister_netdev(dev);
    free_netdev(dev);
}

module_init(my_netdev_init);
module_exit(my_netdev_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Example Linux Network Device Driver");