ginuerzh
76 lines
1.2 KiB
Go
76 lines
1.2 KiB
Go
package router
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import (
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"encoding/binary"
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"errors"
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"io"
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"math"
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"net"
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"sync"
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"github.com/go-gost/core/common/bufpool"
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)
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type packetConn struct {
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net.Conn
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}
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func (c *packetConn) Read(b []byte) (n int, err error) {
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var bb [2]byte
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_, err = io.ReadFull(c.Conn, bb[:])
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if err != nil {
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return
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}
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dlen := int(binary.BigEndian.Uint16(bb[:]))
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if len(b) >= dlen {
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return io.ReadFull(c.Conn, b[:dlen])
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}
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buf := bufpool.Get(dlen)
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defer bufpool.Put(buf)
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n, err = io.ReadFull(c.Conn, buf)
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copy(b, buf[:n])
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return
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}
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func (c *packetConn) Write(b []byte) (n int, err error) {
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if len(b) > math.MaxUint16 {
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err = errors.New("write: data maximum exceeded")
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return
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}
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buf := bufpool.Get(len(b) + 2)
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defer bufpool.Put(buf)
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binary.BigEndian.PutUint16(buf[:2], uint16(len(b)))
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n = copy(buf[2:], b)
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return c.Conn.Write(buf)
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}
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type lockWriter struct {
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w io.Writer
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mu sync.Mutex
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}
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func LockWriter(w io.Writer) io.Writer {
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return &lockWriter{w: w}
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}
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func (w *lockWriter) Write(p []byte) (int, error) {
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w.mu.Lock()
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defer w.mu.Unlock()
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return w.w.Write(p)
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}
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func (w *lockWriter) Close() error {
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if closer, ok := w.w.(io.Closer); ok {
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return closer.Close()
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}
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return nil
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}
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