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Code Issues Releases Wiki Activity

Close connection chan when socks client finishes sending data, and fix a performance issue in VMess decoding.

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This commit is contained in:
V2Ray 2015-09-14 13:51:30 +02:00
parent 194abb9d6c
commit e7ce2c7166
8 changed files with 66 additions and 171 deletions
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72
io/vmess/decryptionreader.go
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@ -1,72 +0,0 @@
package vmess
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"fmt"
"io"
v2io "github.com/v2ray/v2ray-core/io"
)
const (
blockSize = 16 // Decryption block size, inherited from AES
)
// DecryptionReader is a byte stream reader to decrypt AES-128 CBC (for now)
// encrypted content.
type DecryptionReader struct {
reader *v2io.CryptionReader
buffer *bytes.Buffer
}
// NewDecryptionReader creates a new DescriptionReader by given byte Reader and
// AES key.
func NewDecryptionReader(reader io.Reader, key []byte, iv []byte) (*DecryptionReader, error) {
decryptionReader := new(DecryptionReader)
aesCipher, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
aesStream := cipher.NewCFBDecrypter(aesCipher, iv)
decryptionReader.reader = v2io.NewCryptionReader(aesStream, reader)
decryptionReader.buffer = bytes.NewBuffer(make([]byte, 0, 2*blockSize))
return decryptionReader, nil
}
func (reader *DecryptionReader) readBlock() error {
buffer := make([]byte, blockSize)
nBytes, err := reader.reader.Read(buffer)
if err != nil && err != io.EOF {
return err
}
if nBytes < blockSize {
return fmt.Errorf("Expected to read %d bytes, but got %d bytes", blockSize, nBytes)
}
reader.buffer.Write(buffer)
return err
}
// Read returns decrypted bytes of given length
func (reader *DecryptionReader) Read(p []byte) (int, error) {
nBytes, err := reader.buffer.Read(p)
if err != nil && err != io.EOF {
return nBytes, err
}
if nBytes < len(p) {
err = reader.readBlock()
if err != nil {
return nBytes, err
}
moreBytes, err := reader.buffer.Read(p[nBytes:])
if err != nil {
return nBytes, err
}
nBytes += moreBytes
if nBytes != len(p) {
return nBytes, fmt.Errorf("Unable to read %d bytes", len(p))
}
}
return nBytes, err
}

62
io/vmess/decryptionreader_test.go
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@ -1,62 +0,0 @@
package vmess
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"crypto/rand"
mrand "math/rand"
"testing"
"github.com/v2ray/v2ray-core/testing/unit"
)
func randomBytes(p []byte, t *testing.T) {
assert := unit.Assert(t)
nBytes, err := rand.Read(p)
assert.Error(err).IsNil()
assert.Int(nBytes).Named("# bytes of random buffer").Equals(len(p))
}
func TestNormalReading(t *testing.T) {
assert := unit.Assert(t)
testSize := 256
plaintext := make([]byte, testSize)
randomBytes(plaintext, t)
keySize := 16
key := make([]byte, keySize)
randomBytes(key, t)
iv := make([]byte, keySize)
randomBytes(iv, t)
aesBlock, err := aes.NewCipher(key)
assert.Error(err).IsNil()
aesStream := cipher.NewCFBEncrypter(aesBlock, iv)
ciphertext := make([]byte, testSize)
aesStream.XORKeyStream(ciphertext, plaintext)
ciphertextcopy := make([]byte, testSize)
copy(ciphertextcopy, ciphertext)
reader, err := NewDecryptionReader(bytes.NewReader(ciphertextcopy), key, iv)
assert.Error(err).IsNil()
readtext := make([]byte, testSize)
readSize := 0
for readSize < testSize {
nBytes := mrand.Intn(16) + 1
if nBytes > testSize-readSize {
nBytes = testSize - readSize
}
bytesRead, err := reader.Read(readtext[readSize : readSize+nBytes])
assert.Error(err).IsNil()
assert.Int(bytesRead).Equals(nBytes)
readSize += nBytes
}
assert.Bytes(readtext).Named("Plaintext").Equals(plaintext)
}

10
io/vmess/vmess.go
View File

@ -22,6 +22,8 @@ const (
addrTypeDomain = byte(0x02)
Version = byte(0x01)
blockSize = 16
)
var (
@ -75,8 +77,14 @@ func (r *VMessRequestReader) Read(reader io.Reader) (*VMessRequest, error) {
return nil, ErrorInvalidUser
}
request.UserId = *userId
aesCipher, err := aes.NewCipher(userId.Hash([]byte("PWD")))
if err != nil {
return nil, err
}
aesStream := cipher.NewCFBDecrypter(aesCipher, emptyIV)
decryptor := v2io.NewCryptionReader(aesStream, reader)
decryptor, err := NewDecryptionReader(reader, userId.Hash([]byte("PWD")), emptyIV)
if err != nil {
return nil, err
}

22
net/freedom/freedom.go
View File

@ -27,26 +27,34 @@ func (vconn *FreedomConnection) Start(ray core.OutboundRay) error {
}
log.Debug("Sending outbound tcp: %s", vconn.dest.String())
finish := make(chan bool, 2)
go vconn.DumpInput(conn, input, finish)
go vconn.DumpOutput(conn, output, finish)
go vconn.CloseConn(conn, finish)
readFinish := make(chan bool)
writeFinish := make(chan bool)
go vconn.DumpInput(conn, input, writeFinish)
go vconn.DumpOutput(conn, output, readFinish)
go vconn.CloseConn(conn, readFinish, writeFinish)
return nil
}
func (vconn *FreedomConnection) DumpInput(conn net.Conn, input <-chan []byte, finish chan<- bool) {
v2net.ChanToWriter(conn, input)
log.Debug("Freedom closing input")
finish <- true
}
func (vconn *FreedomConnection) DumpOutput(conn net.Conn, output chan<- []byte, finish chan<- bool) {
v2net.ReaderToChan(output, conn)
close(output)
log.Debug("Freedom closing output")
finish <- true
}
func (vconn *FreedomConnection) CloseConn(conn net.Conn, finish <-chan bool) {
<-finish
<-finish
func (vconn *FreedomConnection) CloseConn(conn net.Conn, readFinish <-chan bool, writeFinish <-chan bool) {
<-writeFinish
if tcpConn, ok := conn.(*net.TCPConn); ok {
log.Debug("Closing freedom write.")
tcpConn.CloseWrite();
}
<-readFinish
conn.Close()
}

22
net/socks/socks.go
View File

@ -76,11 +76,10 @@ func (server *SocksServer) HandleConnection(connection net.Conn) error {
authResponse := socksio.NewAuthenticationResponse(socksio.AuthNoMatchingMethod)
socksio.WriteAuthentication(connection, authResponse)
log.Info("Client doesn't support allowed any auth methods.")
log.Warning("Client doesn't support allowed any auth methods.")
return ErrorAuthenticationFailed
}
log.Debug("Auth accepted, responding auth.")
authResponse := socksio.NewAuthenticationResponse(socksio.AuthNotRequired)
socksio.WriteAuthentication(connection, authResponse)
@ -96,7 +95,7 @@ func (server *SocksServer) HandleConnection(connection net.Conn) error {
response := socksio.NewSocks5Response()
response.Error = socksio.ErrorCommandNotSupported
socksio.WriteResponse(connection, response)
log.Info("Unsupported socks command %d", request.Command)
log.Warning("Unsupported socks command %d", request.Command)
return ErrorCommandNotSupported
}
@ -111,17 +110,17 @@ func (server *SocksServer) HandleConnection(connection net.Conn) error {
case socksio.AddrTypeDomain:
response.Domain = request.Domain
}
log.Debug("Socks response port = %d", response.Port)
socksio.WriteResponse(connection, response)
ray := server.vPoint.NewInboundConnectionAccepted(request.Destination())
input := ray.InboundInput()
output := ray.InboundOutput()
finish := make(chan bool, 2)
readFinish := make(chan bool)
writeFinish := make(chan bool)
go server.dumpInput(connection, input, finish)
go server.dumpOutput(connection, output, finish)
server.waitForFinish(finish)
go server.dumpInput(connection, input, readFinish)
go server.dumpOutput(connection, output, writeFinish)
<-writeFinish
return nil
}
@ -129,15 +128,12 @@ func (server *SocksServer) HandleConnection(connection net.Conn) error {
func (server *SocksServer) dumpInput(conn net.Conn, input chan<- []byte, finish chan<- bool) {
v2net.ReaderToChan(input, conn)
close(input)
log.Debug("Socks input closed")
finish <- true
}
func (server *SocksServer) dumpOutput(conn net.Conn, output <-chan []byte, finish chan<- bool) {
v2net.ChanToWriter(conn, output)
log.Debug("Socks output closed")
finish <- true
}
func (server *SocksServer) waitForFinish(finish <-chan bool) {
<-finish
<-finish
}

24
net/vmess/vmessin.go
View File

@ -50,6 +50,7 @@ func (handler *VMessInboundHandler) AcceptConnections(listener net.Listener) err
func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error {
defer connection.Close()
reader := vmessio.NewVMessRequestReader(handler.clients)
request, err := reader.Read(connection)
@ -60,7 +61,6 @@ func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error
response := vmessio.NewVMessResponse(request)
nBytes, err := connection.Write(response[:])
log.Debug("Writing VMess response %v", response)
if err != nil {
return log.Error("Failed to write VMess response (%d bytes): %v", nBytes, err)
}
@ -83,11 +83,19 @@ func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error
ray := handler.vPoint.NewInboundConnectionAccepted(request.Address)
input := ray.InboundInput()
output := ray.InboundOutput()
finish := make(chan bool, 2)
readFinish := make(chan bool)
writeFinish := make(chan bool)
go handler.dumpInput(requestReader, input, finish)
go handler.dumpOutput(responseWriter, output, finish)
handler.waitForFinish(finish)
go handler.dumpInput(requestReader, input, readFinish)
go handler.dumpOutput(responseWriter, output, writeFinish)
<-writeFinish
if tcpConn, ok := connection.(*net.TCPConn); ok {
log.Debug("VMessIn closing write")
tcpConn.CloseWrite();
}
<-readFinish
return nil
}
@ -95,18 +103,16 @@ func (handler *VMessInboundHandler) HandleConnection(connection net.Conn) error
func (handler *VMessInboundHandler) dumpInput(reader io.Reader, input chan<- []byte, finish chan<- bool) {
v2net.ReaderToChan(input, reader)
close(input)
log.Debug("VMessIn closing input")
finish <- true
}
func (handler *VMessInboundHandler) dumpOutput(writer io.Writer, output <-chan []byte, finish chan<- bool) {
v2net.ChanToWriter(writer, output)
log.Debug("VMessOut closing output")
finish <- true
}
func (handler *VMessInboundHandler) waitForFinish(finish <-chan bool) {
<-finish
<-finish
}
type VMessInboundHandlerFactory struct {
}

19
net/vmess/vmessout.go
View File

@ -67,7 +67,7 @@ func (handler *VMessOutboundHandler) Start(ray core.OutboundRay) error {
}
func (handler *VMessOutboundHandler) startCommunicate(request *vmessio.VMessRequest, dest v2net.Address, ray core.OutboundRay) error {
conn, err := net.Dial("tcp", dest.String())
conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{dest.IP, int(dest.Port), ""})
log.Debug("VMessOutbound dialing tcp: %s", dest.String())
if err != nil {
log.Error("Failed to open tcp (%s): %v", dest.String(), err)
@ -109,22 +109,29 @@ func (handler *VMessOutboundHandler) startCommunicate(request *vmessio.VMessRequ
input := ray.OutboundInput()
output := ray.OutboundOutput()
finish := make(chan bool, 2)
readFinish := make(chan bool)
writeFinish := make(chan bool)
go handler.dumpInput(encryptRequestWriter, input, finish)
go handler.dumpOutput(decryptResponseReader, output, finish)
handler.waitForFinish(finish)
return nil
go handler.dumpInput(encryptRequestWriter, input, readFinish)
go handler.dumpOutput(decryptResponseReader, output, writeFinish)
<-readFinish
conn.CloseWrite()
log.Debug("VMessOut closing write")
<-writeFinish
return nil
}
func (handler *VMessOutboundHandler) dumpOutput(reader io.Reader, output chan<- []byte, finish chan<- bool) {
v2net.ReaderToChan(output, reader)
close(output)
log.Debug("VMessOut closing output")
finish <- true
}
func (handler *VMessOutboundHandler) dumpInput(writer io.Writer, input <-chan []byte, finish chan<- bool) {
v2net.ChanToWriter(writer, input)
log.Debug("VMessOut closing input")
finish <- true
}

6
ray.go
View File

@ -1,12 +1,16 @@
package core
const (
bufferSize = 16
)
type Ray struct {
Input chan []byte
Output chan []byte
}
func NewRay() Ray {
return Ray{make(chan []byte, 128), make(chan []byte, 128)}
return Ray{make(chan []byte, bufferSize), make(chan []byte, bufferSize)}
}
type OutboundRay interface {