Feature: add dhcp type dns client (#1509)

component/dialer/bind.go

@@ -1,118 +0,0 @@
-package dialer
-
-import (
-	"errors"
-	"net"
-	"time"
-
-	"github.com/Dreamacro/clash/common/singledo"
-)
-
-// In some OS, such as Windows, it takes a little longer to get interface information
-var ifaceSingle = singledo.NewSingle(time.Second * 20)
-
-var (
-	errPlatformNotSupport = errors.New("unsupport platform")
-)
-
-func lookupTCPAddr(ip net.IP, addrs []net.Addr) (*net.TCPAddr, error) {
-	ipv4 := ip.To4() != nil
-
-	for _, elm := range addrs {
-		addr, ok := elm.(*net.IPNet)
-		if !ok {
-			continue
-		}
-
-		addrV4 := addr.IP.To4() != nil
-
-		if addrV4 && ipv4 {
-			return &net.TCPAddr{IP: addr.IP, Port: 0}, nil
-		} else if !addrV4 && !ipv4 {
-			return &net.TCPAddr{IP: addr.IP, Port: 0}, nil
-		}
-	}
-
-	return nil, ErrAddrNotFound
-}
-
-func lookupUDPAddr(ip net.IP, addrs []net.Addr) (*net.UDPAddr, error) {
-	ipv4 := ip.To4() != nil
-
-	for _, elm := range addrs {
-		addr, ok := elm.(*net.IPNet)
-		if !ok {
-			continue
-		}
-
-		addrV4 := addr.IP.To4() != nil
-
-		if addrV4 && ipv4 {
-			return &net.UDPAddr{IP: addr.IP, Port: 0}, nil
-		} else if !addrV4 && !ipv4 {
-			return &net.UDPAddr{IP: addr.IP, Port: 0}, nil
-		}
-	}
-
-	return nil, ErrAddrNotFound
-}
-
-func fallbackBindToDialer(dialer *net.Dialer, network string, ip net.IP, name string) error {
-	if !ip.IsGlobalUnicast() {
-		return nil
-	}
-
-	iface, err, _ := ifaceSingle.Do(func() (interface{}, error) {
-		return net.InterfaceByName(name)
-	})
-	if err != nil {
-		return err
-	}
-
-	addrs, err := iface.(*net.Interface).Addrs()
-	if err != nil {
-		return err
-	}
-
-	switch network {
-	case "tcp", "tcp4", "tcp6":
-		if addr, err := lookupTCPAddr(ip, addrs); err == nil {
-			dialer.LocalAddr = addr
-		} else {
-			return err
-		}
-	case "udp", "udp4", "udp6":
-		if addr, err := lookupUDPAddr(ip, addrs); err == nil {
-			dialer.LocalAddr = addr
-		} else {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func fallbackBindToListenConfig(name string) (string, error) {
-	iface, err, _ := ifaceSingle.Do(func() (interface{}, error) {
-		return net.InterfaceByName(name)
-	})
-	if err != nil {
-		return "", err
-	}
-
-	addrs, err := iface.(*net.Interface).Addrs()
-	if err != nil {
-		return "", err
-	}
-
-	for _, elm := range addrs {
-		addr, ok := elm.(*net.IPNet)
-		if !ok || addr.IP.To4() == nil {
-			continue
-		}
-
-		return net.JoinHostPort(addr.IP.String(), "0"), nil
-	}
-
-	return "", ErrAddrNotFound
-}