mirror of
https://github.com/xjasonlyu/tun2socks.git
synced 2024-12-30 02:37:01 +00:00
91 lines
1.9 KiB
Go
91 lines
1.9 KiB
Go
package metadata
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"net"
|
|
"strconv"
|
|
|
|
"github.com/xjasonlyu/tun2socks/v2/transport/socks5"
|
|
)
|
|
|
|
// Metadata contains metadata of transport protocol sessions.
|
|
type Metadata struct {
|
|
Network Network `json:"network"`
|
|
SrcIP net.IP `json:"sourceIP"`
|
|
MidIP net.IP `json:"dialerIP"`
|
|
DstIP net.IP `json:"destinationIP"`
|
|
SrcPort uint16 `json:"sourcePort"`
|
|
MidPort uint16 `json:"dialerPort"`
|
|
DstPort uint16 `json:"destinationPort"`
|
|
}
|
|
|
|
func (m *Metadata) DestinationAddress() string {
|
|
return net.JoinHostPort(m.DstIP.String(), strconv.FormatUint(uint64(m.DstPort), 10))
|
|
}
|
|
|
|
func (m *Metadata) SourceAddress() string {
|
|
return net.JoinHostPort(m.SrcIP.String(), strconv.FormatUint(uint64(m.SrcPort), 10))
|
|
}
|
|
|
|
func (m *Metadata) Addr() net.Addr {
|
|
if udpAddr := m.UDPAddr(); udpAddr != nil {
|
|
return udpAddr
|
|
}
|
|
return &Addr{metadata: m}
|
|
}
|
|
|
|
func (m *Metadata) TCPAddr() *net.TCPAddr {
|
|
if m.Network != TCP || m.DstIP == nil {
|
|
return nil
|
|
}
|
|
return &net.TCPAddr{
|
|
IP: m.DstIP,
|
|
Port: int(m.DstPort),
|
|
}
|
|
}
|
|
|
|
func (m *Metadata) UDPAddr() *net.UDPAddr {
|
|
if m.Network != UDP || m.DstIP == nil {
|
|
return nil
|
|
}
|
|
return &net.UDPAddr{
|
|
IP: m.DstIP,
|
|
Port: int(m.DstPort),
|
|
}
|
|
}
|
|
|
|
func (m *Metadata) SerializeSocksAddr() socks5.Addr {
|
|
var (
|
|
buf [][]byte
|
|
port [2]byte
|
|
)
|
|
binary.BigEndian.PutUint16(port[:], m.DstPort)
|
|
|
|
if m.DstIP.To4() != nil /* IPv4 */ {
|
|
aType := socks5.AtypIPv4
|
|
buf = [][]byte{{aType}, m.DstIP.To4(), port[:]}
|
|
} else /* IPv6 */ {
|
|
aType := socks5.AtypIPv6
|
|
buf = [][]byte{{aType}, m.DstIP.To16(), port[:]}
|
|
}
|
|
return bytes.Join(buf, nil)
|
|
}
|
|
|
|
// Addr implements the net.Addr interface.
|
|
type Addr struct {
|
|
metadata *Metadata
|
|
}
|
|
|
|
func (a *Addr) Metadata() *Metadata {
|
|
return a.metadata
|
|
}
|
|
|
|
func (a *Addr) Network() string {
|
|
return a.metadata.Network.String()
|
|
}
|
|
|
|
func (a *Addr) String() string {
|
|
return a.metadata.DestinationAddress()
|
|
}
|