88 lines
1.6 KiB
Go
88 lines
1.6 KiB
Go
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package wol
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import (
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"bytes"
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"encoding/hex"
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"errors"
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"fmt"
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"net"
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"regexp"
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"strings"
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)
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var (
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MacFormatError = errors.New("mac 地址格式错误")
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)
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type Service struct {
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}
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var Services *Service
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func init() {
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Services = &Service{}
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}
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func (s *Service) validateMac(mac string) bool {
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exp, _ := regexp.Compile("([0-9a-fA-F]{2}(-|:)?){5}([a-fA-F0-9]{2})")
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macLen := len(mac)
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return exp.MatchString(mac) && (macLen == 12 || macLen == 17)
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}
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func (s *Service) WakeUp(mac string, port int) error {
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mac = strings.Replace(strings.Replace(mac, ":", "", -1), "-", "", -1)
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if !s.validateMac(mac) {
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return MacFormatError
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}
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return s.wake(mac, port)
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}
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func (s *Service) wake(mac string, port int) error {
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udpAddr, _ := net.ResolveUDPAddr("udp", fmt.Sprintf("255.255.255.255:%d", port))
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interfaces, err := net.Interfaces()
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if err != nil {
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return err
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}
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macHex, _ := hex.DecodeString(mac)
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// 广播MAC地址 FF:FF:FF:FF:FF:FF
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var broadcast = []byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}
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var buffer bytes.Buffer
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buffer.Write(broadcast)
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for i := 0; i < 16; i++ {
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buffer.Write(macHex)
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}
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wolPackage := buffer.Bytes()
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for _, i := range interfaces {
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if i.Flags&net.FlagUp == 0 {
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continue
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}
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addrs, err := i.Addrs()
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if err != nil {
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return err
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}
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for _, addr := range addrs {
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if ip, ok := addr.(*net.IPNet); ok {
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if ipv4 := ip.IP.To4(); ipv4 != nil {
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conn, err := net.DialUDP("udp", &net.UDPAddr{IP: ipv4}, udpAddr)
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if err != nil {
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return err
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}
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_, _ = conn.Write(wolPackage)
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_ = conn.Close()
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}
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}
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}
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}
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return err
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}
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