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