Xray-core/common/singbridge/pipe.go

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2023-04-23 11:31:41 +00:00
package singbridge
import (
"context"
"io"
"net"
"github.com/sagernet/sing/common/bufio"
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/transport"
)
func CopyConn(ctx context.Context, inboundConn net.Conn, link *transport.Link, serverConn net.Conn) error {
conn := &PipeConnWrapper{
W: link.Writer,
Conn: inboundConn,
}
if ir, ok := link.Reader.(io.Reader); ok {
conn.R = ir
} else {
conn.R = &buf.BufferedReader{Reader: link.Reader}
}
return ReturnError(bufio.CopyConn(ctx, conn, serverConn))
}
type PipeConnWrapper struct {
R io.Reader
W buf.Writer
net.Conn
}
func (w *PipeConnWrapper) Close() error {
return nil
}
func (w *PipeConnWrapper) Read(b []byte) (n int, err error) {
return w.R.Read(b)
}
func (w *PipeConnWrapper) Write(p []byte) (n int, err error) {
n = len(p)
var mb buf.MultiBuffer
pLen := len(p)
for pLen > 0 {
buffer := buf.New()
if pLen > buf.Size {
_, err = buffer.Write(p[:buf.Size])
p = p[buf.Size:]
} else {
buffer.Write(p)
}
pLen -= int(buffer.Len())
mb = append(mb, buffer)
}
err = w.W.WriteMultiBuffer(mb)
if err != nil {
n = 0
buf.ReleaseMulti(mb)
}
return
}