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