mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-09-20 10:37:51 +00:00
97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
package shadowtls
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import (
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"encoding/binary"
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"io"
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"net"
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"github.com/sagernet/sing-box/common/tls"
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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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N "github.com/sagernet/sing/common/network"
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)
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var (
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_ N.ExtendedConn = (*Conn)(nil)
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_ N.VectorisedWriter = (*Conn)(nil)
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)
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type Conn struct {
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N.ExtendedConn
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writer N.VectorisedWriter
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readRemaining int
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}
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func NewConn(conn net.Conn) *Conn {
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return &Conn{
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ExtendedConn: bufio.NewExtendedConn(conn),
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writer: bufio.NewVectorisedWriter(conn),
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}
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}
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func (c *Conn) Read(p []byte) (n int, err error) {
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if c.readRemaining > 0 {
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if len(p) > c.readRemaining {
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p = p[:c.readRemaining]
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}
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n, err = c.ExtendedConn.Read(p)
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c.readRemaining -= n
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return
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}
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var tlsHeader [5]byte
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_, err = io.ReadFull(c.ExtendedConn, common.Dup(tlsHeader[:]))
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if err != nil {
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return
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}
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length := int(binary.BigEndian.Uint16(tlsHeader[3:5]))
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readLen := len(p)
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if readLen > length {
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readLen = length
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}
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n, err = c.ExtendedConn.Read(p[:readLen])
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if err != nil {
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return
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}
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c.readRemaining = length - n
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return
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}
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func (c *Conn) Write(p []byte) (n int, err error) {
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var header [5]byte
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defer common.KeepAlive(header)
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header[0] = 23
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for len(p) > 16384 {
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binary.BigEndian.PutUint16(header[1:3], tls.VersionTLS12)
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binary.BigEndian.PutUint16(header[3:5], uint16(16384))
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_, err = bufio.WriteVectorised(c.writer, [][]byte{common.Dup(header[:]), p[:16384]})
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common.KeepAlive(header)
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if err != nil {
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return
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}
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n += 16384
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p = p[16384:]
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}
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binary.BigEndian.PutUint16(header[1:3], tls.VersionTLS12)
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binary.BigEndian.PutUint16(header[3:5], uint16(len(p)))
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_, err = bufio.WriteVectorised(c.writer, [][]byte{common.Dup(header[:]), p})
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if err == nil {
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n += len(p)
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}
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return
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}
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func (c *Conn) WriteVectorised(buffers []*buf.Buffer) error {
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var header [5]byte
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defer common.KeepAlive(header)
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header[0] = 23
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dataLen := buf.LenMulti(buffers)
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binary.BigEndian.PutUint16(header[1:3], tls.VersionTLS12)
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binary.BigEndian.PutUint16(header[3:5], uint16(dataLen))
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return c.writer.WriteVectorised(append([]*buf.Buffer{buf.As(header[:])}, buffers...))
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}
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func (c *Conn) Upstream() any {
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return c.ExtendedConn
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}
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