mirror of
https://github.com/MetaCubeX/mihomo.git
synced 2024-12-27 12:35:39 +08:00
110 lines
2.1 KiB
Go
110 lines
2.1 KiB
Go
package vless
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"errors"
|
|
"io"
|
|
"io/ioutil"
|
|
"net"
|
|
|
|
"github.com/gofrs/uuid"
|
|
)
|
|
|
|
/*var (
|
|
|
|
//proto.Marshal(addons) bytes for Flow: "xtls-rprx-direct"
|
|
addOnBytes, _ = hex.DecodeString("120a1078746c732d727072782d646972656374")
|
|
addOnBytesLen = len(addOnBytes)
|
|
|
|
//proto.Marshal(addons) bytes for Flow: ""
|
|
//addOnEmptyBytes, _ = hex.DecodeString("00")
|
|
//addOnEmptyBytesLen = len(addOnEmptyBytes)
|
|
)*/
|
|
|
|
type Conn struct {
|
|
net.Conn
|
|
dst *DstAddr
|
|
id *uuid.UUID
|
|
|
|
received bool
|
|
}
|
|
|
|
func (vc *Conn) Read(b []byte) (int, error) {
|
|
if vc.received {
|
|
return vc.Conn.Read(b)
|
|
}
|
|
|
|
if err := vc.recvResponse(); err != nil {
|
|
return 0, err
|
|
}
|
|
vc.received = true
|
|
return vc.Conn.Read(b)
|
|
}
|
|
|
|
func (vc *Conn) sendRequest() error {
|
|
buf := &bytes.Buffer{}
|
|
|
|
buf.WriteByte(Version) // protocol version
|
|
buf.Write(vc.id.Bytes()) // 16 bytes of uuid
|
|
|
|
// command
|
|
if vc.dst.UDP {
|
|
buf.WriteByte(0) // addon data length. 0 means no addon data
|
|
//buf.WriteByte(byte(addOnEmptyBytesLen))
|
|
//buf.Write(addOnEmptyBytes)
|
|
buf.WriteByte(CommandUDP)
|
|
} else {
|
|
buf.WriteByte(0) // addon data length. 0 means no addon data
|
|
//buf.WriteByte(byte(addOnBytesLen))
|
|
//buf.Write(addOnBytes)
|
|
buf.WriteByte(CommandTCP)
|
|
}
|
|
|
|
// Port AddrType Addr
|
|
binary.Write(buf, binary.BigEndian, uint16(vc.dst.Port))
|
|
buf.WriteByte(vc.dst.AddrType)
|
|
buf.Write(vc.dst.Addr)
|
|
|
|
_, err := vc.Conn.Write(buf.Bytes())
|
|
return err
|
|
}
|
|
|
|
func (vc *Conn) recvResponse() error {
|
|
var err error
|
|
buf := make([]byte, 1)
|
|
_, err = io.ReadFull(vc.Conn, buf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if buf[0] != Version {
|
|
return errors.New("unexpected response version")
|
|
}
|
|
|
|
_, err = io.ReadFull(vc.Conn, buf)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
length := int64(buf[0])
|
|
if length != 0 { // addon data length > 0
|
|
io.CopyN(ioutil.Discard, vc.Conn, length) // just discard
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// newConn return a Conn instance
|
|
func newConn(conn net.Conn, id *uuid.UUID, dst *DstAddr) (*Conn, error) {
|
|
c := &Conn{
|
|
Conn: conn,
|
|
id: id,
|
|
dst: dst,
|
|
}
|
|
if err := c.sendRequest(); err != nil {
|
|
return nil, err
|
|
}
|
|
return c, nil
|
|
}
|