mirror of
https://github.com/MetaCubeX/mihomo.git
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185 lines
4.5 KiB
Go
185 lines
4.5 KiB
Go
package outbound
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import (
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"context"
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"crypto/tls"
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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/gun"
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"github.com/Dreamacro/clash/component/trojan"
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C "github.com/Dreamacro/clash/constant"
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"golang.org/x/net/http2"
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)
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type Trojan struct {
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*Base
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instance *trojan.Trojan
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// for gun mux
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gunTLSConfig *tls.Config
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gunConfig *gun.Config
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transport *http2.Transport
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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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Network string `proxy:"network,omitempty"`
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GrpcOpts GrpcOptions `proxy:"grpc-opts,omitempty"`
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}
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// StreamConn implements C.ProxyAdapter
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func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
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var err error
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if t.transport != nil {
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c, err = gun.StreamGunWithConn(c, t.gunTLSConfig, t.gunConfig)
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} else {
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c, err = t.instance.StreamConn(c)
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}
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
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}
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err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
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return c, err
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}
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// DialContext implements C.ProxyAdapter
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func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
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// gun transport
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if t.transport != nil {
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c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
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if err != nil {
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return nil, err
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}
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if err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata)); err != nil {
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c.Close()
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return nil, err
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}
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return NewConn(c, t), nil
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}
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c, err := dialer.DialContext(ctx, "tcp", t.addr)
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
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}
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tcpKeepAlive(c)
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defer safeConnClose(c, err)
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c, err = t.StreamConn(c, metadata)
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if err != nil {
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return nil, err
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}
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return NewConn(c, t), err
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}
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// DialUDP implements C.ProxyAdapter
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func (t *Trojan) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
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var c net.Conn
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// grpc transport
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if t.transport != nil {
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c, err = gun.StreamGunWithTransport(t.transport, t.gunConfig)
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
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}
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defer safeConnClose(c, err)
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} else {
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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.addr)
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
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}
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defer safeConnClose(c, err)
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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.addr, err)
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}
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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(pc, 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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addr := 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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ClientSessionCache: getClientSessionCache(),
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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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t := &Trojan{
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Base: &Base{
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name: option.Name,
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addr: addr,
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tp: C.Trojan,
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udp: option.UDP,
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},
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instance: trojan.New(tOption),
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}
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if option.Network == "grpc" {
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dialFn := func(network, addr string) (net.Conn, error) {
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c, err := dialer.DialContext(context.Background(), "tcp", t.addr)
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %s", t.addr, err.Error())
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}
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tcpKeepAlive(c)
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return c, nil
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}
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tlsConfig := &tls.Config{
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NextProtos: option.ALPN,
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MinVersion: tls.VersionTLS12,
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InsecureSkipVerify: tOption.SkipCertVerify,
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ServerName: tOption.ServerName,
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ClientSessionCache: getClientSessionCache(),
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}
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t.transport = gun.NewHTTP2Client(dialFn, tlsConfig)
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t.gunTLSConfig = tlsConfig
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t.gunConfig = &gun.Config{
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ServiceName: option.GrpcOpts.GrpcServiceName,
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Host: tOption.ServerName,
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}
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}
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return t, nil
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}
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