clash/constant/metadata.go
2022-03-13 01:22:05 +08:00

137 lines
2.4 KiB
Go

package constant
import (
"encoding/json"
"net"
"strconv"
)
// Socks addr type
const (
AtypIPv4 = 1
AtypDomainName = 3
AtypIPv6 = 4
TCP NetWork = iota
UDP
ALLNet
HTTP Type = iota
HTTPCONNECT
SOCKS4
SOCKS5
REDIR
TPROXY
TUN
)
type NetWork int
func (n NetWork) String() string {
if n == TCP {
return "tcp"
} else if n == UDP {
return "udp"
}
return "all"
}
func (n NetWork) MarshalJSON() ([]byte, error) {
return json.Marshal(n.String())
}
type Type int
func (t Type) String() string {
switch t {
case HTTP:
return "HTTP"
case HTTPCONNECT:
return "HTTP Connect"
case SOCKS4:
return "Socks4"
case SOCKS5:
return "Socks5"
case REDIR:
return "Redir"
case TPROXY:
return "TProxy"
case TUN:
return "Tun"
default:
return "Unknown"
}
}
func (t Type) MarshalJSON() ([]byte, error) {
return json.Marshal(t.String())
}
// Metadata is used to store connection address
type Metadata struct {
NetWork NetWork `json:"network"`
Type Type `json:"type"`
SrcIP net.IP `json:"sourceIP"`
DstIP net.IP `json:"destinationIP"`
SrcPort string `json:"sourcePort"`
DstPort string `json:"destinationPort"`
AddrType int `json:"-"`
Host string `json:"host"`
DNSMode DNSMode `json:"dnsMode"`
Process string `json:"process"`
ProcessPath string `json:"processPath"`
}
func (m *Metadata) RemoteAddress() string {
return net.JoinHostPort(m.String(), m.DstPort)
}
func (m *Metadata) SourceAddress() string {
return net.JoinHostPort(m.SrcIP.String(), m.SrcPort)
}
func (m *Metadata) Resolved() bool {
return m.DstIP != nil
}
// Pure is used to solve unexpected behavior
// when dialing proxy connection in DNSMapping mode.
func (m *Metadata) Pure() *Metadata {
if m.DNSMode == DNSMapping && m.DstIP != nil {
copy := *m
copy.Host = ""
if copy.DstIP.To4() != nil {
copy.AddrType = AtypIPv4
} else {
copy.AddrType = AtypIPv6
}
return &copy
}
return m
}
func (m *Metadata) UDPAddr() *net.UDPAddr {
if m.NetWork != UDP || m.DstIP == nil {
return nil
}
port, _ := strconv.ParseUint(m.DstPort, 10, 16)
return &net.UDPAddr{
IP: m.DstIP,
Port: int(port),
}
}
func (m *Metadata) String() string {
if m.Host != "" {
return m.Host
} else if m.DstIP != nil {
return m.DstIP.String()
} else {
return "<nil>"
}
}
func (m *Metadata) Valid() bool {
return m.Host != "" || m.DstIP != nil
}