482 lines
11 KiB
Go
482 lines
11 KiB
Go
package v4
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"context"
|
|
"crypto/tls"
|
|
"errors"
|
|
"net"
|
|
"runtime"
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
"unsafe"
|
|
|
|
atomic2 "github.com/Dreamacro/clash/common/atomic"
|
|
"github.com/Dreamacro/clash/common/buf"
|
|
N "github.com/Dreamacro/clash/common/net"
|
|
"github.com/Dreamacro/clash/common/pool"
|
|
C "github.com/Dreamacro/clash/constant"
|
|
"github.com/Dreamacro/clash/log"
|
|
"github.com/Dreamacro/clash/transport/tuic/common"
|
|
|
|
"github.com/metacubex/quic-go"
|
|
"github.com/zhangyunhao116/fastrand"
|
|
)
|
|
|
|
type ClientOption struct {
|
|
TlsConfig *tls.Config
|
|
QuicConfig *quic.Config
|
|
Token [32]byte
|
|
UdpRelayMode common.UdpRelayMode
|
|
CongestionController string
|
|
ReduceRtt bool
|
|
RequestTimeout time.Duration
|
|
MaxUdpRelayPacketSize int
|
|
FastOpen bool
|
|
MaxOpenStreams int64
|
|
CWND int
|
|
}
|
|
|
|
type clientImpl struct {
|
|
*ClientOption
|
|
udp bool
|
|
|
|
quicConn quic.Connection
|
|
connMutex sync.Mutex
|
|
|
|
openStreams atomic.Int64
|
|
closed atomic.Bool
|
|
|
|
udpInputMap sync.Map
|
|
|
|
// only ready for PoolClient
|
|
dialerRef C.Dialer
|
|
lastVisited atomic2.TypedValue[time.Time]
|
|
}
|
|
|
|
func (t *clientImpl) OpenStreams() int64 {
|
|
return t.openStreams.Load()
|
|
}
|
|
|
|
func (t *clientImpl) DialerRef() C.Dialer {
|
|
return t.dialerRef
|
|
}
|
|
|
|
func (t *clientImpl) LastVisited() time.Time {
|
|
return t.lastVisited.Load()
|
|
}
|
|
|
|
func (t *clientImpl) SetLastVisited(last time.Time) {
|
|
t.lastVisited.Store(last)
|
|
}
|
|
|
|
func (t *clientImpl) getQuicConn(ctx context.Context, dialer C.Dialer, dialFn common.DialFunc) (quic.Connection, error) {
|
|
t.connMutex.Lock()
|
|
defer t.connMutex.Unlock()
|
|
if t.quicConn != nil {
|
|
return t.quicConn, nil
|
|
}
|
|
transport, addr, err := dialFn(ctx, dialer)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
var quicConn quic.Connection
|
|
if t.ReduceRtt {
|
|
quicConn, err = transport.DialEarly(ctx, addr, t.TlsConfig, t.QuicConfig)
|
|
} else {
|
|
quicConn, err = transport.Dial(ctx, addr, t.TlsConfig, t.QuicConfig)
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
common.SetCongestionController(quicConn, t.CongestionController, t.CWND)
|
|
|
|
go func() {
|
|
_ = t.sendAuthentication(quicConn)
|
|
}()
|
|
|
|
if t.udp {
|
|
go func() {
|
|
switch t.UdpRelayMode {
|
|
case common.QUIC:
|
|
_ = t.handleUniStream(quicConn)
|
|
default: // native
|
|
_ = t.handleMessage(quicConn)
|
|
}
|
|
}()
|
|
}
|
|
|
|
t.quicConn = quicConn
|
|
t.openStreams.Store(0)
|
|
return quicConn, nil
|
|
}
|
|
|
|
func (t *clientImpl) sendAuthentication(quicConn quic.Connection) (err error) {
|
|
defer func() {
|
|
t.deferQuicConn(quicConn, err)
|
|
}()
|
|
stream, err := quicConn.OpenUniStream()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
buf := pool.GetBuffer()
|
|
defer pool.PutBuffer(buf)
|
|
err = NewAuthenticate(t.Token).WriteTo(buf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = buf.WriteTo(stream)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
err = stream.Close()
|
|
if err != nil {
|
|
return
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (t *clientImpl) handleUniStream(quicConn quic.Connection) (err error) {
|
|
defer func() {
|
|
t.deferQuicConn(quicConn, err)
|
|
}()
|
|
for {
|
|
var stream quic.ReceiveStream
|
|
stream, err = quicConn.AcceptUniStream(context.Background())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
go func() (err error) {
|
|
var assocId uint32
|
|
defer func() {
|
|
t.deferQuicConn(quicConn, err)
|
|
if err != nil && assocId != 0 {
|
|
if val, ok := t.udpInputMap.LoadAndDelete(assocId); ok {
|
|
if conn, ok := val.(net.Conn); ok {
|
|
_ = conn.Close()
|
|
}
|
|
}
|
|
}
|
|
stream.CancelRead(0)
|
|
}()
|
|
reader := bufio.NewReader(stream)
|
|
commandHead, err := ReadCommandHead(reader)
|
|
if err != nil {
|
|
return
|
|
}
|
|
switch commandHead.TYPE {
|
|
case PacketType:
|
|
var packet Packet
|
|
packet, err = ReadPacketWithHead(commandHead, reader)
|
|
if err != nil {
|
|
return
|
|
}
|
|
if t.udp && t.UdpRelayMode == common.QUIC {
|
|
assocId = packet.ASSOC_ID
|
|
if val, ok := t.udpInputMap.Load(assocId); ok {
|
|
if conn, ok := val.(net.Conn); ok {
|
|
writer := bufio.NewWriterSize(conn, packet.BytesLen())
|
|
_ = packet.WriteTo(writer)
|
|
_ = writer.Flush()
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return
|
|
}()
|
|
}
|
|
}
|
|
|
|
func (t *clientImpl) handleMessage(quicConn quic.Connection) (err error) {
|
|
defer func() {
|
|
t.deferQuicConn(quicConn, err)
|
|
}()
|
|
for {
|
|
var message []byte
|
|
message, err = quicConn.ReceiveMessage(context.Background())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
go func() (err error) {
|
|
var assocId uint32
|
|
defer func() {
|
|
t.deferQuicConn(quicConn, err)
|
|
if err != nil && assocId != 0 {
|
|
if val, ok := t.udpInputMap.LoadAndDelete(assocId); ok {
|
|
if conn, ok := val.(net.Conn); ok {
|
|
_ = conn.Close()
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
reader := bytes.NewBuffer(message)
|
|
commandHead, err := ReadCommandHead(reader)
|
|
if err != nil {
|
|
return
|
|
}
|
|
switch commandHead.TYPE {
|
|
case PacketType:
|
|
var packet Packet
|
|
packet, err = ReadPacketWithHead(commandHead, reader)
|
|
if err != nil {
|
|
return
|
|
}
|
|
if t.udp && t.UdpRelayMode == common.NATIVE {
|
|
assocId = packet.ASSOC_ID
|
|
if val, ok := t.udpInputMap.Load(assocId); ok {
|
|
if conn, ok := val.(net.Conn); ok {
|
|
_, _ = conn.Write(message)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return
|
|
}()
|
|
}
|
|
}
|
|
|
|
func (t *clientImpl) deferQuicConn(quicConn quic.Connection, err error) {
|
|
var netError net.Error
|
|
if err != nil && errors.As(err, &netError) {
|
|
t.forceClose(quicConn, err)
|
|
}
|
|
}
|
|
|
|
func (t *clientImpl) forceClose(quicConn quic.Connection, err error) {
|
|
t.connMutex.Lock()
|
|
defer t.connMutex.Unlock()
|
|
if quicConn == nil {
|
|
quicConn = t.quicConn
|
|
}
|
|
if quicConn != nil {
|
|
if quicConn == t.quicConn {
|
|
t.quicConn = nil
|
|
}
|
|
}
|
|
errStr := ""
|
|
if err != nil {
|
|
errStr = err.Error()
|
|
}
|
|
if quicConn != nil {
|
|
_ = quicConn.CloseWithError(ProtocolError, errStr)
|
|
}
|
|
udpInputMap := &t.udpInputMap
|
|
udpInputMap.Range(func(key, value any) bool {
|
|
if conn, ok := value.(net.Conn); ok {
|
|
_ = conn.Close()
|
|
}
|
|
udpInputMap.Delete(key)
|
|
return true
|
|
})
|
|
}
|
|
|
|
func (t *clientImpl) Close() {
|
|
t.closed.Store(true)
|
|
if t.openStreams.Load() == 0 {
|
|
t.forceClose(nil, common.ClientClosed)
|
|
}
|
|
}
|
|
|
|
func (t *clientImpl) DialContextWithDialer(ctx context.Context, metadata *C.Metadata, dialer C.Dialer, dialFn common.DialFunc) (net.Conn, error) {
|
|
quicConn, err := t.getQuicConn(ctx, dialer, dialFn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
openStreams := t.openStreams.Add(1)
|
|
if openStreams >= t.MaxOpenStreams {
|
|
t.openStreams.Add(-1)
|
|
return nil, common.TooManyOpenStreams
|
|
}
|
|
stream, err := func() (stream net.Conn, err error) {
|
|
defer func() {
|
|
t.deferQuicConn(quicConn, err)
|
|
}()
|
|
buf := pool.GetBuffer()
|
|
defer pool.PutBuffer(buf)
|
|
err = NewConnect(NewAddress(metadata)).WriteTo(buf)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
quicStream, err := quicConn.OpenStream()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
stream = common.NewQuicStreamConn(
|
|
quicStream,
|
|
quicConn.LocalAddr(),
|
|
quicConn.RemoteAddr(),
|
|
func() {
|
|
time.AfterFunc(C.DefaultTCPTimeout, func() {
|
|
openStreams := t.openStreams.Add(-1)
|
|
if openStreams == 0 && t.closed.Load() {
|
|
t.forceClose(quicConn, common.ClientClosed)
|
|
}
|
|
})
|
|
},
|
|
)
|
|
_, err = buf.WriteTo(stream)
|
|
if err != nil {
|
|
_ = stream.Close()
|
|
return nil, err
|
|
}
|
|
return stream, err
|
|
}()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
bufConn := N.NewBufferedConn(stream)
|
|
conn := &earlyConn{ExtendedConn: bufConn, bufConn: bufConn, RequestTimeout: t.RequestTimeout}
|
|
if !t.FastOpen {
|
|
err = conn.Response()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
return conn, nil
|
|
}
|
|
|
|
type earlyConn struct {
|
|
N.ExtendedConn // only expose standard N.ExtendedConn function to outside
|
|
bufConn *N.BufferedConn
|
|
resOnce sync.Once
|
|
resErr error
|
|
|
|
RequestTimeout time.Duration
|
|
}
|
|
|
|
func (conn *earlyConn) response() error {
|
|
if conn.RequestTimeout > 0 {
|
|
_ = conn.SetReadDeadline(time.Now().Add(conn.RequestTimeout))
|
|
}
|
|
response, err := ReadResponse(conn.bufConn)
|
|
if err != nil {
|
|
_ = conn.Close()
|
|
return err
|
|
}
|
|
if response.IsFailed() {
|
|
_ = conn.Close()
|
|
return errors.New("connect failed")
|
|
}
|
|
_ = conn.SetReadDeadline(time.Time{})
|
|
return nil
|
|
}
|
|
|
|
func (conn *earlyConn) Response() error {
|
|
conn.resOnce.Do(func() {
|
|
conn.resErr = conn.response()
|
|
})
|
|
return conn.resErr
|
|
}
|
|
|
|
func (conn *earlyConn) Read(b []byte) (n int, err error) {
|
|
err = conn.Response()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return conn.bufConn.Read(b)
|
|
}
|
|
|
|
func (conn *earlyConn) ReadBuffer(buffer *buf.Buffer) (err error) {
|
|
err = conn.Response()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return conn.bufConn.ReadBuffer(buffer)
|
|
}
|
|
|
|
func (conn *earlyConn) Upstream() any {
|
|
return conn.bufConn
|
|
}
|
|
|
|
func (conn *earlyConn) ReaderReplaceable() bool {
|
|
return atomic.LoadUint32((*uint32)(unsafe.Pointer(&conn.resOnce))) == 1 && conn.resErr == nil
|
|
}
|
|
|
|
func (conn *earlyConn) WriterReplaceable() bool {
|
|
return true
|
|
}
|
|
|
|
func (t *clientImpl) ListenPacketWithDialer(ctx context.Context, metadata *C.Metadata, dialer C.Dialer, dialFn common.DialFunc) (net.PacketConn, error) {
|
|
quicConn, err := t.getQuicConn(ctx, dialer, dialFn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
openStreams := t.openStreams.Add(1)
|
|
if openStreams >= t.MaxOpenStreams {
|
|
t.openStreams.Add(-1)
|
|
return nil, common.TooManyOpenStreams
|
|
}
|
|
|
|
pipe1, pipe2 := net.Pipe()
|
|
var connId uint32
|
|
for {
|
|
connId = fastrand.Uint32()
|
|
_, loaded := t.udpInputMap.LoadOrStore(connId, pipe1)
|
|
if !loaded {
|
|
break
|
|
}
|
|
}
|
|
pc := &quicStreamPacketConn{
|
|
connId: connId,
|
|
quicConn: quicConn,
|
|
inputConn: N.NewBufferedConn(pipe2),
|
|
udpRelayMode: t.UdpRelayMode,
|
|
maxUdpRelayPacketSize: t.MaxUdpRelayPacketSize,
|
|
deferQuicConnFn: t.deferQuicConn,
|
|
closeDeferFn: func() {
|
|
t.udpInputMap.Delete(connId)
|
|
time.AfterFunc(C.DefaultUDPTimeout, func() {
|
|
openStreams := t.openStreams.Add(-1)
|
|
if openStreams == 0 && t.closed.Load() {
|
|
t.forceClose(quicConn, common.ClientClosed)
|
|
}
|
|
})
|
|
},
|
|
}
|
|
return pc, nil
|
|
}
|
|
|
|
type Client struct {
|
|
*clientImpl // use an independent pointer to let Finalizer can work no matter somewhere handle an influence in clientImpl inner
|
|
}
|
|
|
|
func (t *Client) DialContextWithDialer(ctx context.Context, metadata *C.Metadata, dialer C.Dialer, dialFn common.DialFunc) (net.Conn, error) {
|
|
conn, err := t.clientImpl.DialContextWithDialer(ctx, metadata, dialer, dialFn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return N.NewRefConn(conn, t), err
|
|
}
|
|
|
|
func (t *Client) ListenPacketWithDialer(ctx context.Context, metadata *C.Metadata, dialer C.Dialer, dialFn common.DialFunc) (net.PacketConn, error) {
|
|
pc, err := t.clientImpl.ListenPacketWithDialer(ctx, metadata, dialer, dialFn)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return N.NewRefPacketConn(pc, t), nil
|
|
}
|
|
|
|
func (t *Client) forceClose() {
|
|
t.clientImpl.forceClose(nil, common.ClientClosed)
|
|
}
|
|
|
|
func NewClient(clientOption *ClientOption, udp bool, dialerRef C.Dialer) *Client {
|
|
ci := &clientImpl{
|
|
ClientOption: clientOption,
|
|
udp: udp,
|
|
dialerRef: dialerRef,
|
|
}
|
|
c := &Client{ci}
|
|
runtime.SetFinalizer(c, closeClient)
|
|
log.Debugln("New TuicV4 Client at %p", c)
|
|
return c
|
|
}
|
|
|
|
func closeClient(client *Client) {
|
|
log.Debugln("Close TuicV4 Client at %p", client)
|
|
client.forceClose()
|
|
}
|