93 lines
1.9 KiB
Go
93 lines
1.9 KiB
Go
//go:build !linux && !darwin
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// +build !linux,!darwin
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package dialer
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import (
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"net"
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"strconv"
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"strings"
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"github.com/Dreamacro/clash/component/iface"
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)
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func lookupLocalAddr(ifaceName string, network string, destination net.IP, port int) (net.Addr, error) {
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ifaceObj, err := iface.ResolveInterface(ifaceName)
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if err != nil {
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return nil, err
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}
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var addr *net.IPNet
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switch network {
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case "udp4", "tcp4":
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addr, err = ifaceObj.PickIPv4Addr(destination)
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case "tcp6", "udp6":
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addr, err = ifaceObj.PickIPv6Addr(destination)
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default:
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if destination != nil {
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if destination.To4() != nil {
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addr, err = ifaceObj.PickIPv4Addr(destination)
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} else {
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addr, err = ifaceObj.PickIPv6Addr(destination)
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}
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} else {
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addr, err = ifaceObj.PickIPv4Addr(destination)
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}
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}
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if err != nil {
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return nil, err
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}
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if strings.HasPrefix(network, "tcp") {
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return &net.TCPAddr{
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IP: addr.IP,
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Port: port,
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}, nil
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} else if strings.HasPrefix(network, "udp") {
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return &net.UDPAddr{
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IP: addr.IP,
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Port: port,
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}, nil
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}
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return nil, iface.ErrAddrNotFound
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}
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func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, network string, destination net.IP) error {
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if !destination.IsGlobalUnicast() {
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return nil
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}
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local := 0
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if dialer.LocalAddr != nil {
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_, port, err := net.SplitHostPort(dialer.LocalAddr.String())
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if err == nil {
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local, _ = strconv.Atoi(port)
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}
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}
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addr, err := lookupLocalAddr(ifaceName, network, destination, local)
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if err != nil {
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return err
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}
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dialer.LocalAddr = addr
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return nil
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}
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func bindIfaceToListenConfig(ifaceName string, _ *net.ListenConfig, network, address string) (string, error) {
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_, port, err := net.SplitHostPort(address)
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if err != nil {
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port = "0"
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}
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local, _ := strconv.Atoi(port)
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addr, err := lookupLocalAddr(ifaceName, network, nil, local)
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if err != nil {
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return "", err
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}
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return addr.String(), nil
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}
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