116 lines
3.1 KiB
Go
116 lines
3.1 KiB
Go
package outbound
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import (
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"context"
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"net"
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"runtime"
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"time"
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"github.com/sagernet/sing-box/adapter"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/buf"
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"github.com/sagernet/sing/common/bufio"
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E "github.com/sagernet/sing/common/exceptions"
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N "github.com/sagernet/sing/common/network"
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)
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type myOutboundAdapter struct {
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protocol string
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logger log.ContextLogger
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tag string
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network []string
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}
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func (a *myOutboundAdapter) Type() string {
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return a.protocol
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}
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func (a *myOutboundAdapter) Tag() string {
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return a.tag
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}
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func (a *myOutboundAdapter) Network() []string {
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return a.network
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}
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func NewConnection(ctx context.Context, this N.Dialer, conn net.Conn, metadata adapter.InboundContext) error {
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ctx = adapter.WithContext(ctx, &metadata)
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var outConn net.Conn
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var err error
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if len(metadata.DestinationAddresses) > 0 {
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outConn, err = N.DialSerial(ctx, this, C.NetworkTCP, metadata.Destination, metadata.DestinationAddresses)
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} else {
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outConn, err = this.DialContext(ctx, C.NetworkTCP, metadata.Destination)
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}
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if err != nil {
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return err
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}
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return bufio.CopyConn(ctx, conn, outConn)
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}
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func NewEarlyConnection(ctx context.Context, this N.Dialer, conn net.Conn, metadata adapter.InboundContext) error {
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ctx = adapter.WithContext(ctx, &metadata)
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var outConn net.Conn
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var err error
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if len(metadata.DestinationAddresses) > 0 {
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outConn, err = N.DialSerial(ctx, this, C.NetworkTCP, metadata.Destination, metadata.DestinationAddresses)
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} else {
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outConn, err = this.DialContext(ctx, C.NetworkTCP, metadata.Destination)
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}
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if err != nil {
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return err
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}
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return CopyEarlyConn(ctx, conn, outConn)
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}
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func NewPacketConnection(ctx context.Context, this N.Dialer, conn N.PacketConn, metadata adapter.InboundContext) error {
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ctx = adapter.WithContext(ctx, &metadata)
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var outConn net.PacketConn
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var err error
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if len(metadata.DestinationAddresses) > 0 {
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outConn, err = N.ListenSerial(ctx, this, metadata.Destination, metadata.DestinationAddresses)
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} else {
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outConn, err = this.ListenPacket(ctx, metadata.Destination)
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}
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if err != nil {
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return err
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}
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return bufio.CopyPacketConn(ctx, conn, bufio.NewPacketConn(outConn))
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}
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func CopyEarlyConn(ctx context.Context, conn net.Conn, serverConn net.Conn) error {
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if cachedReader, isCached := serverConn.(N.CachedReader); isCached {
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payload := cachedReader.ReadCached()
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if payload != nil && !payload.IsEmpty() {
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_, err := serverConn.Write(payload.Bytes())
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if err != nil {
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return err
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}
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return bufio.CopyConn(ctx, conn, serverConn)
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}
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}
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_payload := buf.StackNew()
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payload := common.Dup(_payload)
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err := conn.SetReadDeadline(time.Now().Add(300 * time.Millisecond))
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if err != nil {
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return err
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}
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_, err = payload.ReadFrom(conn)
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if err != nil && !E.IsTimeout(err) {
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return E.Cause(err, "read payload")
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}
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err = conn.SetReadDeadline(time.Time{})
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if err != nil {
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payload.Release()
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return err
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}
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_, err = serverConn.Write(payload.Bytes())
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if err != nil {
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return E.Cause(err, "client handshake")
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}
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runtime.KeepAlive(_payload)
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return bufio.CopyConn(ctx, conn, serverConn)
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}
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