如何区分虚拟MAC地址和物理MAC地址

Question

我该如何区分它们呢？我不想使用虚拟的。

下面是我使用net.Interfaces()得到的结果

[[
{1 65536 lo  up|loopback} 
{2 1450 eth0 fa:16:3e:12:39:9c up|broadcast|multicast} 
{3 1500 docker0 02:42:b4:9d:fb:54 up|broadcast|multicast} 
{4 1500 br-dbabe92ec60c 02:42:e3:7f:96:13 up|broadcast|multicast} 
{6 1500 veth4bb5809 e6:a3:38:2f:f7:e4 up|broadcast|multicast} 
{8 1500 vethcada9d2 16:8c:c9:37:8d:76 up|broadcast|multicast} 
{10 1500 veth1e10eaa da:37:f9:9a:1d:10 up|broadcast|multicast}
]]

我找不到他们之间的区别。

Answer 1

像下面这样的东西应该可以工作。代码中的注释解释了为什么这个faq也是如此。

package main

import (
    "fmt"
    "net"
    "os"
)

func main(){

    ifaces, err := net.Interfaces()
    if err != nil {
        fmt.Println(err)
        os.Exit(0)
    }

    for _, iface := range ifaces {      
        // If the second least significant bit of the first octet of the MAC address is 1,
        // then it's a locally administered address so we omit it.
        // If HardwareAddr is nil, it's a loopbook, so omit.
        if (iface.HardwareAddr==nil) || (iface.HardwareAddr[0]&2 == 2) {
            continue
        }
        fmt.Println(iface)
    }

}

我相信你有理由使用MAC作为uuid，但如果我没有提到你可能想要考虑做一些像UUIDv4这样的事情，那就是我的疏忽。

Answer 2

如果硬件设备已向https://macvendors.com/注册，则可以使用其应用编程接口

我在你的数据中添加了另一个mac地址，因为上面的这些似乎都不是真正的硬件。

package main

import (
        "fmt"
        "net/http"
        "net/url"
        "io"
        "time"
)

type idata struct {
        index int
        mtu   int
        name  string
        mac   string
        flags string
}

func main() {

        data := []idata{
                {1, 65536, "lo", "", "up|loopback"},
                {2, 1450, "eth0", "", "up|broadcast|multicast"},
                {3, 1500, "docker0", "02:42:b4:9d:fb:54", "up|broadcast|multicast"},
                {4, 1500, "br-dbabe92ec60c", "02:42:e3:7f:96:13", "up|broadcast|multicast"},
                {6, 1500, "veth4bb5809", "e6:a3:38:2f:f7:e4", "up|broadcast|multicast"},
                {8, 1500, "vethcada9d2", "16:8c:c9:37:8d:76", "up|broadcast|multicast"},
                {10, 1500, "veth1e10eaa", "da:37:f9:9a:1d:10", "up|broadcast|multicast"},
                {11, 1500, "en8", "00:e0:4c:36:01:d4", "up|broadcast|multicast"},
        }

        for _, iv := range data {
                // skip items (like localhost) with no mac address
                if iv.mac == "" {
                   continue
                }
                // url encode the mac address
                mac := url.QueryEscape(iv.mac)              
                resp, err := http.Get("https://api.macvendors.com/" + mac)
                defer resp.Body.Close()
                if err != nil {
                        panic(err)
                }
                
                body, err := io.ReadAll(resp.Body)
                fmt.Println(iv.mac)
                fmt.Println(string(body))
                fmt.Println("-----------------")
                // sleep to stop the API rate limit being exceeded
                time.Sleep( 5 * time.Second)
        }
}