func ListenUDP(address v2net.Address, port v2net.Port, option ListenOption) (*UDPHub, error) {
if option.Concurrency < 1 {
option.Concurrency = 1
}
udpConn, err := net.ListenUDP("udp", &net.UDPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
if option.ReceiveOriginalDest {
fd, err := internal.GetSysFd(udpConn)
if err != nil {
log.Warning("UDP|Listener: Failed to get fd: ", err)
return nil, err
}
err = SetOriginalDestOptions(fd)
if err != nil {
log.Warning("UDP|Listener: Failed to set socket options: ", err)
return nil, err
}
}
hub := &UDPHub{
conn: udpConn,
queue: NewUDPPayloadQueue(option),
option: option,
cancel: signal.NewCloseSignal(),
}
go hub.start()
return hub, nil
}
func ListenUDP(address v2net.Address, port v2net.Port, option ListenOption) (*UDPHub, error) {
udpConn, err := net.ListenUDP("udp", &net.UDPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
if option.ReceiveOriginalDest {
fd, err := internal.GetSysFd(udpConn)
if err != nil {
log.Warning("UDP|Listener: Failed to get fd: ", err)
return nil, err
}
err = SetOriginalDestOptions(fd)
if err != nil {
log.Warning("UDP|Listener: Failed to set socket options: ", err)
return nil, err
}
}
hub := &UDPHub{
conn: udpConn,
option: option,
}
go hub.start()
return hub, nil
}
func writeSocks4Response(writer io.Writer, errCode byte, address v2net.Address, port v2net.Port) error {
buffer := buf.NewLocal(32)
buffer.AppendBytes(0x00, errCode)
buffer.AppendSupplier(serial.WriteUint16(port.Value()))
buffer.Append(address.IP())
_, err := writer.Write(buffer.Bytes())
return err
}
func ListenRawTCP(address v2net.Address, port v2net.Port) (internet.Listener, error) {
listener, err := net.ListenTCP("tcp", &net.TCPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
return &RawTCPListener{
accepting: true,
listener: listener,
}, nil
}
func appendAddress(buffer *buf.Buffer, address v2net.Address, port v2net.Port) {
switch address.Family() {
case v2net.AddressFamilyIPv4:
buffer.AppendBytes(0x01)
buffer.Append(address.IP())
case v2net.AddressFamilyIPv6:
buffer.AppendBytes(0x04)
buffer.Append(address.IP())
case v2net.AddressFamilyDomain:
buffer.AppendBytes(0x03, byte(len(address.Domain())))
buffer.AppendSupplier(serial.WriteString(address.Domain()))
}
buffer.AppendSupplier(serial.WriteUint16(port.Value()))
}
func ListenTCP(address v2net.Address, port v2net.Port) (internet.Listener, error) {
listener, err := net.ListenTCP("tcp", &net.TCPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
l := &TCPListener{
acccepting: true,
listener: listener,
awaitingConns: make(chan *ConnectionWithError, 32),
}
go l.KeepAccepting()
return l, nil
}
func ListenTCP(address v2net.Address, port v2net.Port, options internet.ListenOptions) (internet.Listener, error) {
listener, err := net.ListenTCP("tcp", &net.TCPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
log.Info("TCP|Listener: Listening on ", address, ":", port)
networkSettings, err := options.Stream.GetEffectiveTransportSettings()
if err != nil {
return nil, err
}
tcpSettings := networkSettings.(*Config)
l := &TCPListener{
acccepting: true,
listener: listener,
awaitingConns: make(chan *ConnectionWithError, 32),
config: tcpSettings,
}
if options.Stream != nil && options.Stream.HasSecuritySettings() {
securitySettings, err := options.Stream.GetEffectiveSecuritySettings()
if err != nil {
log.Error("TCP: Failed to get security config: ", err)
return nil, err
}
tlsConfig, ok := securitySettings.(*v2tls.Config)
if ok {
l.tlsConfig = tlsConfig.GetTLSConfig()
}
}
if tcpSettings.HeaderSettings != nil {
headerConfig, err := tcpSettings.HeaderSettings.GetInstance()
if err != nil {
return nil, errors.Base(err).Message("Internet|TCP: Invalid header settings.")
}
auth, err := internet.CreateConnectionAuthenticator(headerConfig)
if err != nil {
return nil, errors.Base(err).Message("Internet|TCP: Invalid header settings.")
}
l.authConfig = auth
}
go l.KeepAccepting()
return l, nil
}
func appendAddress(request []byte, address v2net.Address) []byte {
switch address.Family() {
case v2net.AddressFamilyIPv4:
request = append(request, byte(0x01))
request = append(request, address.IP()...)
case v2net.AddressFamilyIPv6:
request = append(request, byte(0x04))
request = append(request, address.IP()...)
case v2net.AddressFamilyDomain:
request = append(request, byte(0x03), byte(len(address.Domain())))
request = append(request, []byte(address.Domain())...)
}
return request
}
func (this *DefaultSystemDialer) Dial(src v2net.Address, dest v2net.Destination) (net.Conn, error) {
dialer := &net.Dialer{
Timeout: time.Second * 60,
DualStack: true,
}
if src != nil && src != v2net.AnyIP {
var addr net.Addr
if dest.IsTCP() {
addr = &net.TCPAddr{
IP: src.IP(),
Port: 0,
}
} else {
addr = &net.UDPAddr{
IP: src.IP(),
Port: 0,
}
}
dialer.LocalAddr = addr
}
return dialer.Dial(dest.Network().String(), dest.NetAddr())
}