func (this *SocksServer) handlePacket(packet v2net.Packet, clientAddr *net.UDPAddr, targetAddr v2net.Address, port v2net.Port) {
ray := this.space.PacketDispatcher().DispatchToOutbound(packet)
close(ray.InboundInput())
for data := range ray.InboundOutput() {
response := &protocol.Socks5UDPRequest{
Fragment: 0,
Address: targetAddr,
Port: port,
Data: data,
}
log.Info("Writing back UDP response with %d bytes from %s to %s", data.Len(), targetAddr.String(), clientAddr.String())
udpMessage := alloc.NewSmallBuffer().Clear()
response.Write(udpMessage)
this.udpMutex.RLock()
if !this.accepting {
this.udpMutex.RUnlock()
return
}
nBytes, err := this.udpConn.WriteToUDP(udpMessage.Value, clientAddr)
this.udpMutex.RUnlock()
udpMessage.Release()
response.Data.Release()
if err != nil {
log.Error("Socks failed to write UDP message (%d bytes) to %s: %v", nBytes, clientAddr.String(), err)
}
}
}
func startCommunicate(request *protocol.VMessRequest, dest v2net.Address, ray core.OutboundRay) error {
input := ray.OutboundInput()
output := ray.OutboundOutput()
conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{dest.IP, int(dest.Port), ""})
if err != nil {
log.Error("Failed to open tcp (%s): %v", dest.String(), err)
close(output)
return err
}
log.Info("VMessOut: Tunneling request for %s", request.Address.String())
defer conn.Close()
requestFinish := make(chan bool)
responseFinish := make(chan bool)
go handleRequest(conn, request, input, requestFinish)
go handleResponse(conn, request, output, responseFinish)
<-requestFinish
conn.CloseWrite()
<-responseFinish
return nil
}
func (this *Assert) Address(value v2net.Address) *AddressSubject {
return &AddressSubject{
Subject: Subject{
disp: value.String(),
a: this,
},
value: value,
}
}
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 ListenUDP(address v2net.Address, port v2net.Port, callback UDPPayloadHandler) (*UDPHub, error) {
udpConn, err := net.ListenUDP("udp", &net.UDPAddr{
IP: address.IP(),
Port: int(port),
})
if err != nil {
return nil, err
}
hub := &UDPHub{
conn: udpConn,
callback: callback,
}
go hub.start()
return hub, nil
}
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 (server *SocksServer) handlePacket(conn *net.UDPConn, packet v2net.Packet, clientAddr *net.UDPAddr, targetAddr v2net.Address) {
ray := server.vPoint.DispatchToOutbound(packet)
close(ray.InboundInput())
if data, ok := <-ray.InboundOutput(); ok {
response := &protocol.Socks5UDPRequest{
Fragment: 0,
Address: targetAddr,
Data: data,
}
log.Info("Writing back UDP response with %d bytes from %s to %s", len(data), targetAddr.String(), clientAddr.String())
udpMessage := response.Bytes(nil)
nBytes, err := conn.WriteToUDP(udpMessage, clientAddr)
if err != nil {
log.Error("Socks failed to write UDP message (%d bytes) to %s: %v", nBytes, clientAddr.String(), err)
}
}
}
func NewListener(address v2net.Address, port v2net.Port) (*Listener, error) {
l := &Listener{
block: NewSimpleAuthenticator(),
sessions: make(map[string]*Connection),
awaitingConns: make(chan *Connection, 64),
localAddr: &net.UDPAddr{
IP: address.IP(),
Port: int(port),
},
running: true,
}
hub, err := udp.ListenUDP(address, port, l.OnReceive)
if err != nil {
return nil, err
}
l.hub = hub
log.Info("KCP|Listener: listening on ", address, ":", port)
return l, nil
}
func (server *SocksServer) handlePacket(conn *net.UDPConn, packet v2net.Packet, clientAddr *net.UDPAddr, targetAddr v2net.Address) {
ray := server.dispatcher.DispatchToOutbound(packet)
close(ray.InboundInput())
for data := range ray.InboundOutput() {
response := &protocol.Socks5UDPRequest{
Fragment: 0,
Address: targetAddr,
Data: data,
}
log.Info("Writing back UDP response with %d bytes from %s to %s", data.Len(), targetAddr.String(), clientAddr.String())
udpMessage := alloc.NewSmallBuffer().Clear()
response.Write(udpMessage)
nBytes, err := conn.WriteToUDP(udpMessage.Value, clientAddr)
udpMessage.Release()
response.Data.Release()
if err != nil {
log.Error("Socks failed to write UDP message (%d bytes) to %s: %v", nBytes, clientAddr.String(), err)
}
}
}
func DialToDest(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())
}
func appendAddress(request []byte, address v2net.Address) []byte {
switch {
case address.IsIPv4():
request = append(request, byte(0x01))
request = append(request, address.IP()...)
case address.IsIPv6():
request = append(request, byte(0x04))
request = append(request, address.IP()...)
case address.IsDomain():
request = append(request, byte(0x03), byte(len(address.Domain())))
request = append(request, []byte(address.Domain())...)
}
return request
}
func (subject *AddressSubject) Equals(another v2net.Address) {
if !subject.value.Equals(another) {
subject.Fail("equals to", another.String())
}
}
func (subject *AddressSubject) Equals(another v2net.Address) {
if subject.value.IsIPv4() && another.IsIPv4() {
IP(subject.value.IP()).Equals(another.IP())
} else if subject.value.IsIPv6() && another.IsIPv6() {
IP(subject.value.IP()).Equals(another.IP())
} else if subject.value.IsDomain() && another.IsDomain() {
assert.StringLiteral(subject.value.Domain()).Equals(another.Domain())
} else {
subject.Fail(subject.DisplayString(), "equals to", another)
}
}