func TestUDPDestinationEquals(t *testing.T) {
assert := assert.On(t)
dest := v2net.UDPDestination(v2net.IPAddress([]byte{1, 2, 3, 4}), 80)
assert.Bool(dest.Equals(nil)).IsFalse()
dest2 := v2net.UDPDestination(v2net.IPAddress([]byte{1, 2, 3, 4}), 80)
assert.Bool(dest.Equals(dest2)).IsTrue()
dest3 := v2net.TCPDestination(v2net.IPAddress([]byte{1, 2, 3, 4}), 80)
assert.Bool(dest.Equals(dest3)).IsFalse()
dest4 := v2net.UDPDestination(v2net.DomainAddress("v2ray.com"), 80)
assert.Bool(dest.Equals(dest4)).IsFalse()
}
func TestDnsAdd(t *testing.T) {
assert := assert.On(t)
space := app.NewSpace()
outboundHandlerManager := proxyman.NewDefaultOutboundHandlerManager()
outboundHandlerManager.SetDefaultHandler(
freedom.NewFreedomConnection(
&freedom.Config{},
space,
&proxy.OutboundHandlerMeta{
Address: v2net.AnyIP,
StreamSettings: &internet.StreamSettings{
Type: internet.StreamConnectionTypeRawTCP,
},
}))
space.BindApp(proxyman.APP_ID_OUTBOUND_MANAGER, outboundHandlerManager)
space.BindApp(dispatcher.APP_ID, dispatchers.NewDefaultDispatcher(space))
domain := "local.v2ray.com"
server := NewCacheServer(space, &Config{
NameServers: []v2net.Destination{
v2net.UDPDestination(v2net.IPAddress([]byte{8, 8, 8, 8}), v2net.Port(53)),
},
})
space.BindApp(APP_ID, server)
space.Initialize()
ips := server.Get(domain)
assert.Int(len(ips)).Equals(1)
assert.IP(ips[0].To4()).Equals(net.IP([]byte{127, 0, 0, 1}))
}
func (this *Config) UnmarshalJSON(data []byte) error {
type JsonConfig struct {
Servers []v2net.AddressJson `json:"servers"`
Hosts map[string]v2net.AddressJson `json:"hosts"`
}
jsonConfig := new(JsonConfig)
if err := json.Unmarshal(data, jsonConfig); err != nil {
return err
}
this.NameServers = make([]v2net.Destination, len(jsonConfig.Servers))
for idx, server := range jsonConfig.Servers {
this.NameServers[idx] = v2net.UDPDestination(server.Address, v2net.Port(53))
}
if jsonConfig.Hosts != nil {
this.Hosts = make(map[string]net.IP)
for domain, ip := range jsonConfig.Hosts {
if ip.Address.Family().IsDomain() {
return errors.New(ip.Address.String() + " is not an IP.")
}
this.Hosts[domain] = ip.Address.IP()
}
}
return nil
}
func (v *UDPHub) start() {
v.cancel.WaitThread()
defer v.cancel.FinishThread()
oobBytes := make([]byte, 256)
for v.Running() {
buffer := buf.NewSmall()
var noob int
var addr *net.UDPAddr
err := buffer.AppendSupplier(func(b []byte) (int, error) {
n, nb, _, a, e := ReadUDPMsg(v.conn, b, oobBytes)
noob = nb
addr = a
return n, e
})
if err != nil {
log.Info("UDP|Hub: Failed to read UDP msg: ", err)
buffer.Release()
continue
}
session := new(proxy.SessionInfo)
session.Source = v2net.UDPDestination(v2net.IPAddress(addr.IP), v2net.Port(addr.Port))
if v.option.ReceiveOriginalDest && noob > 0 {
session.Destination = RetrieveOriginalDest(oobBytes[:noob])
}
v.queue.Enqueue(UDPPayload{
payload: buffer,
session: session,
})
}
}
func (this *UDPHub) start() {
this.cancel.WaitThread()
defer this.cancel.FinishThread()
oobBytes := make([]byte, 256)
for this.Running() {
buffer := this.pool.Allocate()
nBytes, noob, _, addr, err := ReadUDPMsg(this.conn, buffer.Value, oobBytes)
if err != nil {
log.Info("UDP|Hub: Failed to read UDP msg: ", err)
buffer.Release()
continue
}
buffer.Slice(0, nBytes)
session := new(proxy.SessionInfo)
session.Source = v2net.UDPDestination(v2net.IPAddress(addr.IP), v2net.Port(addr.Port))
if this.option.ReceiveOriginalDest && noob > 0 {
session.Destination = RetrieveOriginalDest(oobBytes[:noob])
}
this.queue.Enqueue(UDPPayload{
payload: buffer,
session: session,
})
}
}
func TestUDPDestination(t *testing.T) {
assert := assert.On(t)
dest := v2net.UDPDestination(v2net.IPAddress([]byte{0x20, 0x01, 0x48, 0x60, 0x48, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x88}), 53)
assert.Destination(dest).IsNotTCP()
assert.Destination(dest).IsUDP()
assert.Destination(dest).EqualsString("udp:[2001:4860:4860::8888]:53")
}
func RetrieveOriginalDest(oob []byte) v2net.Destination {
msgs, err := syscall.ParseSocketControlMessage(oob)
if err != nil {
return v2net.Destination{}
}
for _, msg := range msgs {
if msg.Header.Level == syscall.SOL_IP && msg.Header.Type == syscall.IP_RECVORIGDSTADDR {
ip := v2net.IPAddress(msg.Data[4:8])
port := v2net.PortFromBytes(msg.Data[2:4])
return v2net.UDPDestination(ip, port)
} else if msg.Header.Level == syscall.SOL_IPV6 && msg.Header.Type == syscall.IP_RECVORIGDSTADDR {
ip := v2net.IPAddress(msg.Data[8:24])
port := v2net.PortFromBytes(msg.Data[2:4])
return v2net.UDPDestination(ip, port)
}
}
return v2net.Destination{}
}
func (this *DokodemoDoor) handleUDPPackets(payload *alloc.Buffer, session *proxy.SessionInfo) {
if session.Destination == nil && this.address != nil && this.port > 0 {
session.Destination = v2net.UDPDestination(this.address, this.port)
}
if session.Destination == nil {
log.Info("Dokodemo: Unknown destination, stop forwarding...")
return
}
this.udpServer.Dispatch(session, payload, this.handleUDPResponse)
}
func (v *DokodemoDoor) handleUDPPackets(payload *buf.Buffer, session *proxy.SessionInfo) {
if session.Destination.Network == v2net.Network_Unknown && v.address != nil && v.port > 0 {
session.Destination = v2net.UDPDestination(v.address, v.port)
}
if session.Destination.Network == v2net.Network_Unknown {
log.Info("Dokodemo: Unknown destination, stop forwarding...")
return
}
session.Inbound = v.meta
v.udpServer.Dispatch(session, payload, v.handleUDPResponse)
}
func (this *Server) listenUDP() error {
this.udpServer = udp.NewUDPServer(this.meta, this.packetDispatcher)
udpHub, err := udp.ListenUDP(this.meta.Address, this.meta.Port, udp.ListenOption{Callback: this.handleUDPPayload})
if err != nil {
log.Error("Socks: Failed to listen on udp ", this.meta.Address, ":", this.meta.Port)
return err
}
this.udpMutex.Lock()
this.udpAddress = v2net.UDPDestination(this.config.Address, this.meta.Port)
this.udpHub = udpHub
this.udpMutex.Unlock()
return nil
}
func (v *Server) listenUDP() error {
v.udpServer = udp.NewUDPServer(v.packetDispatcher)
udpHub, err := udp.ListenUDP(v.meta.Address, v.meta.Port, udp.ListenOption{Callback: v.handleUDPPayload})
if err != nil {
log.Error("Socks: Failed to listen on udp (", v.meta.Address, ":", v.meta.Port, "): ", err)
return err
}
v.udpMutex.Lock()
v.udpAddress = v2net.UDPDestination(v.config.GetNetAddress(), v.meta.Port)
v.udpHub = udpHub
v.udpMutex.Unlock()
return nil
}
// Private: Visible for testing.
func (this *Router) ResolveIP(dest v2net.Destination) []v2net.Destination {
ips := this.dnsServer.Get(dest.Address.Domain())
if len(ips) == 0 {
return nil
}
dests := make([]v2net.Destination, len(ips))
for idx, ip := range ips {
if dest.Network == v2net.Network_TCP {
dests[idx] = v2net.TCPDestination(v2net.IPAddress(ip), dest.Port)
} else {
dests[idx] = v2net.UDPDestination(v2net.IPAddress(ip), dest.Port)
}
}
return dests
}
func (server *Server) Start() (v2net.Destination, error) {
conn, err := net.ListenUDP("udp", &net.UDPAddr{
IP: []byte{127, 0, 0, 1},
Port: int(server.Port),
Zone: "",
})
if err != nil {
return nil, err
}
server.Port = v2net.Port(conn.LocalAddr().(*net.UDPAddr).Port)
server.conn = conn
go server.handleConnection(conn)
localAddr := conn.LocalAddr().(*net.UDPAddr)
return v2net.UDPDestination(v2net.IPAddress(localAddr.IP), v2net.Port(localAddr.Port)), nil
}
func (this *Config) UnmarshalJSON(data []byte) error {
type JsonConfig struct {
Port v2net.Port `json:"port"` // Port of this Point server.
LogConfig *LogConfig `json:"log"`
RouterConfig *router.Config `json:"routing"`
DNSConfig *dns.Config `json:"dns"`
InboundConfig *InboundConnectionConfig `json:"inbound"`
OutboundConfig *OutboundConnectionConfig `json:"outbound"`
InboundDetours []*InboundDetourConfig `json:"inboundDetour"`
OutboundDetours []*OutboundDetourConfig `json:"outboundDetour"`
Transport *transport.Config `json:"transport"`
}
jsonConfig := new(JsonConfig)
if err := json.Unmarshal(data, jsonConfig); err != nil {
return errors.New("Point: Failed to parse config: " + err.Error())
}
this.Port = jsonConfig.Port
this.LogConfig = jsonConfig.LogConfig
this.RouterConfig = jsonConfig.RouterConfig
if jsonConfig.InboundConfig == nil {
return errors.New("Point: Inbound config is not specified.")
}
this.InboundConfig = jsonConfig.InboundConfig
if jsonConfig.OutboundConfig == nil {
return errors.New("Point: Outbound config is not specified.")
}
this.OutboundConfig = jsonConfig.OutboundConfig
this.InboundDetours = jsonConfig.InboundDetours
this.OutboundDetours = jsonConfig.OutboundDetours
if jsonConfig.DNSConfig == nil {
jsonConfig.DNSConfig = &dns.Config{
NameServers: []v2net.Destination{
v2net.UDPDestination(v2net.DomainAddress("localhost"), v2net.Port(53)),
},
}
}
this.DNSConfig = jsonConfig.DNSConfig
this.TransportConfig = jsonConfig.Transport
return nil
}
func DialKCP(src v2net.Address, dest v2net.Destination) (internet.Connection, error) {
udpDest := v2net.UDPDestination(dest.Address(), dest.Port())
log.Info("KCP|Dialer: Dialing KCP to ", udpDest)
conn, err := internet.DialToDest(src, udpDest)
if err != nil {
log.Error("KCP|Dialer: Failed to dial to dest: ", err)
return nil, err
}
cpip, err := effectiveConfig.GetAuthenticator()
if err != nil {
log.Error("KCP|Dialer: Failed to create authenticator: ", err)
return nil, err
}
conv := uint16(atomic.AddUint32(&globalConv, 1))
session := NewConnection(conv, conn, conn.LocalAddr().(*net.UDPAddr), conn.RemoteAddr().(*net.UDPAddr), cpip)
session.FetchInputFrom(conn)
return session, nil
}
// Private: Visible for testing.
func (this *FreedomConnection) ResolveIP(destination v2net.Destination) v2net.Destination {
if !destination.Address.Family().IsDomain() {
return destination
}
ips := this.dns.Get(destination.Address.Domain())
if len(ips) == 0 {
log.Info("Freedom: DNS returns nil answer. Keep domain as is.")
return destination
}
ip := ips[dice.Roll(len(ips))]
var newDest v2net.Destination
if destination.Network == v2net.Network_TCP {
newDest = v2net.TCPDestination(v2net.IPAddress(ip), destination.Port)
} else {
newDest = v2net.UDPDestination(v2net.IPAddress(ip), destination.Port)
}
log.Info("Freedom: Changing destination from ", destination, " to ", newDest)
return newDest
}
func (w *udpWorker) callback(b *buf.Buffer, source v2net.Destination, originalDest v2net.Destination) {
conn, existing := w.getConnection(source)
conn.input <- b.Bytes()
if !existing {
go func() {
ctx := w.ctx
ctx, cancel := context.WithCancel(ctx)
conn.cancel = cancel
if originalDest.IsValid() {
ctx = proxy.ContextWithOriginalDestination(ctx, originalDest)
}
if len(w.tag) > 0 {
ctx = proxy.ContextWithInboundTag(ctx, w.tag)
}
ctx = proxy.ContextWithSource(ctx, source)
ctx = proxy.ContextWithInboundDestination(ctx, v2net.UDPDestination(w.address, w.port))
w.proxy.Process(ctx, v2net.Network_UDP, conn)
w.removeConn(source)
cancel()
}()
}
}
func (this *UDPHub) start() {
this.Lock()
this.accepting = true
this.Unlock()
oobBytes := make([]byte, 256)
for this.Running() {
buffer := alloc.NewBuffer()
nBytes, noob, _, addr, err := ReadUDPMsg(this.conn, buffer.Value, oobBytes)
if err != nil {
log.Info("UDP|Hub: Failed to read UDP msg: ", err)
buffer.Release()
continue
}
buffer.Slice(0, nBytes)
session := new(proxy.SessionInfo)
session.Source = v2net.UDPDestination(v2net.IPAddress(addr.IP), v2net.Port(addr.Port))
if this.option.ReceiveOriginalDest && noob > 0 {
session.Destination = RetrieveOriginalDest(oobBytes[:noob])
}
go this.option.Callback(buffer, session)
}
}
func (request *Socks5UDPRequest) Destination() v2net.Destination {
return v2net.UDPDestination(request.Address, request.Port)
}
func TestDialAndListen(t *testing.T) {
assert := assert.On(t)
listerner, err := NewListener(v2net.LocalHostIP, v2net.Port(0))
assert.Error(err).IsNil()
port := v2net.Port(listerner.Addr().(*net.UDPAddr).Port)
go func() {
for {
conn, err := listerner.Accept()
if err != nil {
break
}
go func() {
payload := make([]byte, 4096)
for {
nBytes, err := conn.Read(payload)
if err != nil {
break
}
for idx, b := range payload[:nBytes] {
payload[idx] = b ^ 'c'
}
conn.Write(payload[:nBytes])
}
conn.Close()
}()
}
}()
wg := new(sync.WaitGroup)
for i := 0; i < 10; i++ {
clientConn, err := DialKCP(v2net.LocalHostIP, v2net.UDPDestination(v2net.LocalHostIP, port))
assert.Error(err).IsNil()
wg.Add(1)
go func() {
clientSend := make([]byte, 1024*1024)
rand.Read(clientSend)
go clientConn.Write(clientSend)
clientReceived := make([]byte, 1024*1024)
nBytes, _ := io.ReadFull(clientConn, clientReceived)
assert.Int(nBytes).Equals(len(clientReceived))
clientConn.Close()
clientExpected := make([]byte, 1024*1024)
for idx, b := range clientSend {
clientExpected[idx] = b ^ 'c'
}
assert.Bytes(clientReceived).Equals(clientExpected)
wg.Done()
}()
}
wg.Wait()
time.Sleep(15 * time.Second)
assert.Int(listerner.ActiveConnections()).Equals(0)
listerner.Close()
}
"v2ray.com/core/app/dispatcher"
"v2ray.com/core/common/buf"
"v2ray.com/core/common/dice"
"v2ray.com/core/common/log"
v2net "v2ray.com/core/common/net"
"v2ray.com/core/transport/internet/udp"
)
const (
DefaultTTL = uint32(3600)
CleanupInterval = time.Second * 120
CleanupThreshold = 512
)
var (
pseudoDestination = v2net.UDPDestination(v2net.LocalHostIP, v2net.Port(53))
)
type ARecord struct {
IPs []net.IP
Expire time.Time
}
type NameServer interface {
QueryA(domain string) <-chan *ARecord
}
type PendingRequest struct {
expire time.Time
response chan<- *ARecord
}
func (this *RequestHeader) Destination() v2net.Destination {
if this.Command == RequestCommandUDP {
return v2net.UDPDestination(this.Address, this.Port)
}
return v2net.TCPDestination(this.Address, this.Port)
}
func (this *Server) handlerUDPPayload(payload *alloc.Buffer, session *proxy.SessionInfo) {
defer payload.Release()
source := session.Source
ivLen := this.config.Cipher.IVSize()
iv := payload.Value[:ivLen]
key := this.config.Key
payload.SliceFrom(ivLen)
stream, err := this.config.Cipher.NewDecodingStream(key, iv)
if err != nil {
log.Error("Shadowsocks: Failed to create decoding stream: ", err)
return
}
reader := crypto.NewCryptionReader(stream, payload)
request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(key, iv)), true)
if err != nil {
if err != io.EOF {
log.Access(source, "", log.AccessRejected, err)
log.Warning("Shadowsocks: Invalid request from ", source, ": ", err)
}
return
}
//defer request.Release()
dest := v2net.UDPDestination(request.Address, request.Port)
log.Access(source, dest, log.AccessAccepted, "")
log.Info("Shadowsocks: Tunnelling request to ", dest)
this.udpServer.Dispatch(&proxy.SessionInfo{Source: source, Destination: dest}, request.DetachUDPPayload(), func(destination v2net.Destination, payload *alloc.Buffer) {
defer payload.Release()
response := alloc.NewBuffer().Slice(0, ivLen)
defer response.Release()
rand.Read(response.Value)
respIv := response.Value
stream, err := this.config.Cipher.NewEncodingStream(key, respIv)
if err != nil {
log.Error("Shadowsocks: Failed to create encoding stream: ", err)
return
}
writer := crypto.NewCryptionWriter(stream, response)
switch request.Address.Family() {
case v2net.AddressFamilyIPv4:
writer.Write([]byte{AddrTypeIPv4})
writer.Write(request.Address.IP())
case v2net.AddressFamilyIPv6:
writer.Write([]byte{AddrTypeIPv6})
writer.Write(request.Address.IP())
case v2net.AddressFamilyDomain:
writer.Write([]byte{AddrTypeDomain, byte(len(request.Address.Domain()))})
writer.Write([]byte(request.Address.Domain()))
}
writer.Write(request.Port.Bytes(nil))
writer.Write(payload.Value)
if request.OTA {
respAuth := NewAuthenticator(HeaderKeyGenerator(key, respIv))
respAuth.Authenticate(response.Value, response.Value[ivLen:])
}
this.udpHub.WriteTo(response.Value, source)
})
}
func TestUDPAssociate(t *testing.T) {
assert := assert.On(t)
udpServer := &udp.Server{
MsgProcessor: func(data []byte) []byte {
buffer := make([]byte, 0, 2048)
buffer = append(buffer, []byte("Processed: ")...)
buffer = append(buffer, data...)
return buffer
},
}
_, err := udpServer.Start()
assert.Error(err).IsNil()
defer udpServer.Close()
assert.Error(InitializeServerSetOnce("test_1")).IsNil()
socksPort := v2net.Port(50000)
conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{
IP: []byte{127, 0, 0, 1},
Port: int(socksPort),
})
authRequest := socks5AuthMethodRequest(byte(0))
nBytes, err := conn.Write(authRequest)
assert.Int(nBytes).Equals(len(authRequest))
assert.Error(err).IsNil()
authResponse := make([]byte, 1024)
nBytes, err = conn.Read(authResponse)
assert.Error(err).IsNil()
assert.Bytes(authResponse[:nBytes]).Equals([]byte{socks5Version, 0})
connectRequest := socks5Request(byte(3), v2net.TCPDestination(v2net.IPAddress([]byte{127, 0, 0, 1}), udpServer.Port))
nBytes, err = conn.Write(connectRequest)
assert.Int(nBytes).Equals(len(connectRequest))
assert.Error(err).IsNil()
connectResponse := make([]byte, 1024)
nBytes, err = conn.Read(connectResponse)
assert.Error(err).IsNil()
assert.Bytes(connectResponse[:nBytes]).Equals([]byte{socks5Version, 0, 0, 1, 127, 0, 0, 1, byte(socksPort >> 8), byte(socksPort)})
udpConn, err := net.DialUDP("udp", nil, &net.UDPAddr{
IP: []byte{127, 0, 0, 1},
Port: int(socksPort),
})
assert.Error(err).IsNil()
for i := 0; i < 100; i++ {
udpPayload := "UDP request to udp server."
udpRequest := socks5UDPRequest(v2net.UDPDestination(v2net.LocalHostIP, udpServer.Port), []byte(udpPayload))
nBytes, err = udpConn.Write(udpRequest)
assert.Int(nBytes).Equals(len(udpRequest))
assert.Error(err).IsNil()
udpResponse := make([]byte, 1024)
nBytes, err = udpConn.Read(udpResponse)
assert.Error(err).IsNil()
assert.Bytes(udpResponse[:nBytes]).Equals(
socks5UDPRequest(v2net.UDPDestination(v2net.LocalHostIP, udpServer.Port), []byte("Processed: UDP request to udp server.")))
}
udpConn.Close()
conn.Close()
CloseAllServers()
}
func (v *RequestHeader) Destination() v2net.Destination {
if v.Command == RequestCommandUDP {
return v2net.UDPDestination(v.Address, v.Port)
}
return v2net.TCPDestination(v.Address, v.Port)
}
func TestDialAndListen(t *testing.T) {
assert := assert.On(t)
listerner, err := NewListener(v2net.LocalHostIP, v2net.Port(0), internet.ListenOptions{
Stream: &internet.StreamConfig{
Network: v2net.Network_KCP,
NetworkSettings: []*internet.NetworkSettings{
{
Network: v2net.Network_KCP,
Settings: serial.ToTypedMessage(&Config{}),
},
},
},
})
assert.Error(err).IsNil()
port := v2net.Port(listerner.Addr().(*net.UDPAddr).Port)
go func() {
for {
conn, err := listerner.Accept()
if err != nil {
break
}
go func() {
payload := make([]byte, 4096)
for {
nBytes, err := conn.Read(payload)
if err != nil {
break
}
for idx, b := range payload[:nBytes] {
payload[idx] = b ^ 'c'
}
conn.Write(payload[:nBytes])
}
conn.Close()
}()
}
}()
wg := new(sync.WaitGroup)
for i := 0; i < 10; i++ {
clientConn, err := DialKCP(v2net.LocalHostIP, v2net.UDPDestination(v2net.LocalHostIP, port), internet.DialerOptions{
Stream: &internet.StreamConfig{
Network: v2net.Network_KCP,
NetworkSettings: []*internet.NetworkSettings{
{
Network: v2net.Network_KCP,
Settings: serial.ToTypedMessage(&Config{}),
},
},
},
})
assert.Error(err).IsNil()
wg.Add(1)
go func() {
clientSend := make([]byte, 1024*1024)
rand.Read(clientSend)
go clientConn.Write(clientSend)
clientReceived := make([]byte, 1024*1024)
nBytes, _ := io.ReadFull(clientConn, clientReceived)
assert.Int(nBytes).Equals(len(clientReceived))
clientConn.Close()
clientExpected := make([]byte, 1024*1024)
for idx, b := range clientSend {
clientExpected[idx] = b ^ 'c'
}
assert.Bytes(clientReceived).Equals(clientExpected)
wg.Done()
}()
}
wg.Wait()
for i := 0; i < 60 && listerner.ActiveConnections() > 0; i++ {
time.Sleep(500 * time.Millisecond)
}
assert.Int(listerner.ActiveConnections()).Equals(0)
listerner.Close()
}