package outbound import ( "context" "encoding/json" "fmt" "net" "strconv" "github.com/Dreamacro/clash/component/dialer" "github.com/Dreamacro/clash/component/trojan" C "github.com/Dreamacro/clash/constant" ) type Trojan struct { *Base instance *trojan.Trojan } type TrojanOption struct { Name string `proxy:"name"` Server string `proxy:"server"` Port int `proxy:"port"` Password string `proxy:"password"` ALPN []string `proxy:"alpn,omitempty"` SNI string `proxy:"sni,omitempty"` SkipCertVerify bool `proxy:"skip-cert-verify,omitempty"` UDP bool `proxy:"udp,omitempty"` } func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) { c, err := t.instance.StreamConn(c) if err != nil { return nil, fmt.Errorf("%s connect error: %w", t.addr, err) } err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata)) return c, err } func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) { c, err := dialer.DialContext(ctx, "tcp", t.addr) if err != nil { return nil, fmt.Errorf("%s connect error: %w", t.addr, err) } tcpKeepAlive(c) c, err = t.StreamConn(c, metadata) if err != nil { return nil, err } return NewConn(c, t), err } func (t *Trojan) DialUDP(metadata *C.Metadata) (C.PacketConn, error) { ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout) defer cancel() c, err := dialer.DialContext(ctx, "tcp", t.addr) if err != nil { return nil, fmt.Errorf("%s connect error: %w", t.addr, err) } tcpKeepAlive(c) c, err = t.instance.StreamConn(c) if err != nil { return nil, fmt.Errorf("%s connect error: %w", t.addr, err) } err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata)) if err != nil { return nil, err } pc := t.instance.PacketConn(c) return newPacketConn(pc, t), err } func (t *Trojan) MarshalJSON() ([]byte, error) { return json.Marshal(map[string]string{ "type": t.Type().String(), }) } func NewTrojan(option TrojanOption) (*Trojan, error) { addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port)) tOption := &trojan.Option{ Password: option.Password, ALPN: option.ALPN, ServerName: option.Server, SkipCertVerify: option.SkipCertVerify, ClientSessionCache: getClientSessionCache(), } if option.SNI != "" { tOption.ServerName = option.SNI } return &Trojan{ Base: &Base{ name: option.Name, addr: addr, tp: C.Trojan, udp: option.UDP, }, instance: trojan.New(tOption), }, nil }