mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-25 10:01:30 +00:00
98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
package shadowtls
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"io"
|
|
"net"
|
|
|
|
"github.com/sagernet/sing-box/common/tls"
|
|
"github.com/sagernet/sing/common"
|
|
"github.com/sagernet/sing/common/buf"
|
|
"github.com/sagernet/sing/common/bufio"
|
|
E "github.com/sagernet/sing/common/exceptions"
|
|
N "github.com/sagernet/sing/common/network"
|
|
)
|
|
|
|
var _ N.VectorisedWriter = (*Conn)(nil)
|
|
|
|
type Conn struct {
|
|
net.Conn
|
|
writer N.VectorisedWriter
|
|
readRemaining int
|
|
}
|
|
|
|
func NewConn(conn net.Conn) *Conn {
|
|
return &Conn{
|
|
Conn: conn,
|
|
writer: bufio.NewVectorisedWriter(conn),
|
|
}
|
|
}
|
|
|
|
func (c *Conn) Read(p []byte) (n int, err error) {
|
|
if c.readRemaining > 0 {
|
|
if len(p) > c.readRemaining {
|
|
p = p[:c.readRemaining]
|
|
}
|
|
n, err = c.Conn.Read(p)
|
|
c.readRemaining -= n
|
|
return
|
|
}
|
|
var tlsHeader [5]byte
|
|
_, err = io.ReadFull(c.Conn, common.Dup(tlsHeader[:]))
|
|
if err != nil {
|
|
return
|
|
}
|
|
length := int(binary.BigEndian.Uint16(tlsHeader[3:5]))
|
|
if tlsHeader[0] != 23 {
|
|
return 0, E.New("unexpected TLS record type: ", tlsHeader[0])
|
|
}
|
|
readLen := len(p)
|
|
if readLen > length {
|
|
readLen = length
|
|
}
|
|
n, err = c.Conn.Read(p[:readLen])
|
|
if err != nil {
|
|
return
|
|
}
|
|
c.readRemaining = length - n
|
|
return
|
|
}
|
|
|
|
func (c *Conn) Write(p []byte) (n int, err error) {
|
|
var header [5]byte
|
|
defer common.KeepAlive(header)
|
|
header[0] = 23
|
|
for len(p) > 16384 {
|
|
binary.BigEndian.PutUint16(header[1:3], tls.VersionTLS12)
|
|
binary.BigEndian.PutUint16(header[3:5], uint16(16384))
|
|
_, err = bufio.WriteVectorised(c.writer, [][]byte{common.Dup(header[:]), p[:16384]})
|
|
common.KeepAlive(header)
|
|
if err != nil {
|
|
return
|
|
}
|
|
n += 16384
|
|
p = p[16384:]
|
|
}
|
|
binary.BigEndian.PutUint16(header[1:3], tls.VersionTLS12)
|
|
binary.BigEndian.PutUint16(header[3:5], uint16(len(p)))
|
|
_, err = bufio.WriteVectorised(c.writer, [][]byte{common.Dup(header[:]), p})
|
|
if err == nil {
|
|
n += len(p)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (c *Conn) WriteVectorised(buffers []*buf.Buffer) error {
|
|
var header [5]byte
|
|
defer common.KeepAlive(header)
|
|
header[0] = 23
|
|
dataLen := buf.LenMulti(buffers)
|
|
binary.BigEndian.PutUint16(header[1:3], tls.VersionTLS12)
|
|
binary.BigEndian.PutUint16(header[3:5], uint16(dataLen))
|
|
return c.writer.WriteVectorised(append([]*buf.Buffer{buf.As(header[:])}, buffers...))
|
|
}
|
|
|
|
func (c *Conn) Upstream() any {
|
|
return c.Conn
|
|
}
|