8679968ab0
Ports in TCP and UDP should be parsed as an unsigned integer,
otherwise ports > 32767 get truncated to 32767. As this is
the case with Metadata.UDPAddr(), this fundamentally breaks
UDP connections where demand for high port numbers is high.
This commit fixes all known cases where ParseInt is used for ports,
and has been verified to fix Discord voice connections on port
50001~50004.
Fixes: d40e5e4fe6
Co-authored-by: Hamster Tian <haotia@gmail.com>
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 := uint64(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.ParseUint(port, 10, 16)
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}
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}
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addr, err := lookupLocalAddr(ifaceName, network, destination, int(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.ParseUint(port, 10, 16)
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addr, err := lookupLocalAddr(ifaceName, network, nil, int(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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