package main
import (
	"fmt"
	"os/exec"
	"strings"
	"github.com/safchain/ethtool"
)
func main() {
	baseNicPath := "/sys/class/net/"
	cmd := exec.Command("ls", baseNicPath)
	buf, err := cmd.Output()
	if err != nil {
		//fmt.Println("Error:", err)
		return
	}
	output := string(buf)
	for _, device := range strings.Split(output, "\n") {
		if len(device) > 1 {
			fmt.Println(device)
			ethHandle, err := ethtool.NewEthtool()
			if err != nil {
				panic(err.Error())
			}
			defer ethHandle.Close()
			stats, err := ethHandle.LinkState(device)
			if err != nil {
				panic(err.Error())
			}
			fmt.Printf("LinkName: %s LinkState: %d\n", device, stats)
		}
	}
}
©

public static PhysicalAddress GetMacAddress()
{
  foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
  {
    // Only consider Ethernet network interfaces
    if (nic.NetworkInterfaceType == NetworkInterfaceType.Ethernet) // nic.OperationalStatus == OperationalStatus.Up
    {
      return nic.GetPhysicalAddress();
    }
  }
  return null;
}

package machine 
import (
  "errors"
  "net"
  "os"
  "strings"
  "syscall"
  "unsafe" 
  "golang.org/x/sys/windows"
)
 
func GetMACAddress() (string, error) {
  netInterfaces, err := net.Interfaces()
  if err != nil {
    panic(err.Error())
  }
 
  mac, macerr := "", errors.New("no valid mac address")
  for i := 0; i < len(netInterfaces); i++ {
    if (netInterfaces[i].Flags&net.FlagLoopback) == 0 && strings.Contains(netInterfaces[i].Flags.String(), "broadcast") {
      index := netInterfaces[i].Index
 
      if isEthernet(index) {
        mac = netInterfaces[i].HardwareAddr.String()
        return mac, nil
      }
    }
  }
  return mac, macerr
}
 
// 根据网卡接口 Index 判断其是否为 Ethernet 网卡
func isEthernet(ifindex int) bool {
  aas, err := adapterAddresses()
  if err != nil {
    return false
  }
  result := false
  for _, aa := range aas {
    index := aa.IfIndex
    if ifindex == int(index) {
      switch aa.IfType {
      case windows.IF_TYPE_ETHERNET_CSMACD:
        result = true
      }
 
      if result {
        break
      }
    }
  }
  return result
}
 
// 从 net/interface_windows.go 中复制过来
func adapterAddresses() ([]*windows.IpAdapterAddresses, error) {
  var b []byte
  l := uint32(15000) // recommended initial size
  for {
    b = make([]byte, l)
    err := windows.GetAdaptersAddresses(syscall.AF_UNSPEC, windows.GAA_FLAG_INCLUDE_PREFIX, 0, (*windows.IpAdapterAddresses)(unsafe.Pointer(&b[0])), &l)
    if err == nil {
      if l == 0 {
        return nil, nil
      }
      break
    }
    if err.(syscall.Errno) != syscall.ERROR_BUFFER_OVERFLOW {
      return nil, os.NewSyscallError("getadaptersaddresses", err)
    }
    if l <= uint32(len(b)) {
      return nil, os.NewSyscallError("getadaptersaddresses", err)
    }
  }
  var aas []*windows.IpAdapterAddresses
  for aa := (*windows.IpAdapterAddresses)(unsafe.Pointer(&b[0])); aa != nil; aa = aa.Next {
    aas = append(aas, aa)
  }
  return aas, nil
}