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fix shadowsocks udp ota

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This commit is contained in:
v2ray 2016-01-29 21:55:42 +01:00
parent e9c784d4bd
commit be10ca7e09
3 changed files with 71 additions and 19 deletions
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42
proxy/shadowsocks/protocol.go
View File

@ -17,12 +17,13 @@ const (
)
type Request struct {
Address v2net.Address
Port v2net.Port
OTA bool
Address v2net.Address
Port v2net.Port
OTA bool
UDPPayload *alloc.Buffer
}
func ReadRequest(reader io.Reader, auth *Authenticator) (*Request, error) {
func ReadRequest(reader io.Reader, auth *Authenticator, udp bool) (*Request, error) {
buffer := alloc.NewSmallBuffer()
defer buffer.Release()
@ -85,14 +86,33 @@ func ReadRequest(reader io.Reader, auth *Authenticator) (*Request, error) {
request.Port = v2net.PortFromBytes(buffer.Value[lenBuffer : lenBuffer+2])
lenBuffer += 2
if request.OTA {
authBytes := buffer.Value[lenBuffer : lenBuffer+AuthSize]
_, err = io.ReadFull(reader, authBytes)
if err != nil {
log.Error("Shadowsocks: Failed to read OTA: ", err)
return nil, transport.CorruptedPacket
}
var authBytes []byte
if udp {
nBytes, err := reader.Read(buffer.Value[lenBuffer:])
if err != nil {
log.Error("Shadowsocks: Failed to read UDP payload: ", err)
}
buffer.Slice(0, lenBuffer+nBytes)
if request.OTA {
authBytes = buffer.Value[lenBuffer+nBytes-AuthSize:]
request.UDPPayload = alloc.NewSmallBuffer().Clear().Append(buffer.Value[lenBuffer : lenBuffer+nBytes-AuthSize])
lenBuffer = lenBuffer + nBytes - AuthSize
} else {
request.UDPPayload = alloc.NewSmallBuffer().Clear().Append(buffer.Value[lenBuffer:])
}
} else {
if request.OTA {
authBytes = buffer.Value[lenBuffer : lenBuffer+AuthSize]
_, err = io.ReadFull(reader, authBytes)
if err != nil {
log.Error("Shadowsocks: Failed to read OTA: ", err)
return nil, transport.CorruptedPacket
}
}
}
if request.OTA {
actualAuth := auth.Authenticate(nil, buffer.Value[0:lenBuffer])
if !serial.BytesLiteral(actualAuth).Equals(serial.BytesLiteral(authBytes)) {
log.Error("Shadowsocks: Invalid OTA: ", actualAuth)

38
proxy/shadowsocks/protocol_test.go
View File

@ -17,7 +17,7 @@ func TestNormalRequestParsing(t *testing.T) {
buffer := alloc.NewSmallBuffer().Clear()
buffer.AppendBytes(1, 127, 0, 0, 1, 0, 80)
request, err := ReadRequest(buffer, nil)
request, err := ReadRequest(buffer, nil, false)
assert.Error(err).IsNil()
netassert.Address(request.Address).Equals(v2net.IPAddress([]byte{127, 0, 0, 1}))
netassert.Port(request.Port).Equals(v2net.Port(80))
@ -33,8 +33,42 @@ func TestOTARequest(t *testing.T) {
auth := NewAuthenticator(HeaderKeyGenerator(
[]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5},
[]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5}))
request, err := ReadRequest(buffer, auth)
request, err := ReadRequest(buffer, auth, false)
assert.Error(err).IsNil()
netassert.Address(request.Address).Equals(v2net.DomainAddress("www.v2ray.com"))
assert.Bool(request.OTA).IsTrue()
}
func TestUDPRequestParsing(t *testing.T) {
v2testing.Current(t)
buffer := alloc.NewSmallBuffer().Clear()
buffer.AppendBytes(1, 127, 0, 0, 1, 0, 80, 1, 2, 3, 4, 5, 6)
request, err := ReadRequest(buffer, nil, true)
assert.Error(err).IsNil()
netassert.Address(request.Address).Equals(v2net.IPAddress([]byte{127, 0, 0, 1}))
netassert.Port(request.Port).Equals(v2net.Port(80))
assert.Bool(request.OTA).IsFalse()
assert.Bytes(request.UDPPayload.Value).Equals([]byte{1, 2, 3, 4, 5, 6})
}
func TestUDPRequestWithOTA(t *testing.T) {
v2testing.Current(t)
buffer := alloc.NewSmallBuffer().Clear()
buffer.AppendBytes(
0x13, 13, 119, 119, 119, 46, 118, 50, 114, 97, 121, 46, 99, 111, 109, 0, 0,
1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0,
58, 32, 223, 30, 57, 199, 50, 139, 143, 101)
auth := NewAuthenticator(HeaderKeyGenerator(
[]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5},
[]byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5}))
request, err := ReadRequest(buffer, auth, true)
assert.Error(err).IsNil()
netassert.Address(request.Address).Equals(v2net.DomainAddress("www.v2ray.com"))
assert.Bool(request.OTA).IsTrue()
assert.Bytes(request.UDPPayload.Value).Equals([]byte{
1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0})
}

10
proxy/shadowsocks/shadowsocks.go
View File

@ -85,14 +85,12 @@ func (this *Shadowsocks) handlerUDPPayload(payload *alloc.Buffer, dest v2net.Des
return
}
request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(key, iv)))
request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(key, iv)), true)
if err != nil {
return
}
buffer, _ := v2io.ReadFrom(reader, nil)
packet := v2net.NewPacket(v2net.TCPDestination(request.Address, request.Port), buffer, false)
packet := v2net.NewPacket(v2net.TCPDestination(request.Address, request.Port), request.UDPPayload, false)
ray := this.space.PacketDispatcher().DispatchToOutbound(packet)
close(ray.InboundInput())
@ -126,7 +124,7 @@ func (this *Shadowsocks) handlerUDPPayload(payload *alloc.Buffer, dest v2net.Des
if request.OTA {
respAuth := NewAuthenticator(HeaderKeyGenerator(key, respIv))
respAuth.Authenticate(buffer.Value, buffer.Value[this.config.Cipher.IVSize():])
respAuth.Authenticate(response.Value, response.Value[this.config.Cipher.IVSize():])
}
this.udpHub.WriteTo(response.Value, dest)
@ -155,7 +153,7 @@ func (this *Shadowsocks) handleConnection(conn *hub.TCPConn) {
return
}
request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(iv, key)))
request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(iv, key)), false)
if err != nil {
return
}