365 lines
9.1 KiB
Go
365 lines
9.1 KiB
Go
package outbound
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import (
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"context"
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"crypto/tls"
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"errors"
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"fmt"
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"net"
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"net/http"
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"strconv"
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"github.com/Dreamacro/clash/component/dialer"
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"github.com/Dreamacro/clash/component/resolver"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/transport/gun"
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"github.com/Dreamacro/clash/transport/vless"
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"github.com/Dreamacro/clash/transport/vmess"
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"golang.org/x/net/http2"
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)
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type Vless struct {
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*Base
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client *vless.Client
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option *VlessOption
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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 VlessOption 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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UUID string `proxy:"uuid"`
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Flow string `proxy:"flow,omitempty"`
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FlowShow bool `proxy:"flow-show,omitempty"`
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TLS bool `proxy:"tls,omitempty"`
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UDP bool `proxy:"udp,omitempty"`
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Network string `proxy:"network,omitempty"`
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HTTPOpts HTTPOptions `proxy:"http-opts,omitempty"`
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HTTP2Opts HTTP2Options `proxy:"h2-opts,omitempty"`
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GrpcOpts GrpcOptions `proxy:"grpc-opts,omitempty"`
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WSOpts WSOptions `proxy:"ws-opts,omitempty"`
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WSPath string `proxy:"ws-path,omitempty"`
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WSHeaders map[string]string `proxy:"ws-headers,omitempty"`
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SkipCertVerify bool `proxy:"skip-cert-verify,omitempty"`
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ServerName string `proxy:"servername,omitempty"`
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}
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func (v *Vless) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
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var err error
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switch v.option.Network {
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case "ws":
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if v.option.WSOpts.Path == "" {
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v.option.WSOpts.Path = v.option.WSPath
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}
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if len(v.option.WSOpts.Headers) == 0 {
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v.option.WSOpts.Headers = v.option.WSHeaders
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}
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host, port, _ := net.SplitHostPort(v.addr)
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wsOpts := &vmess.WebsocketConfig{
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Host: host,
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Port: port,
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Path: v.option.WSOpts.Path,
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MaxEarlyData: v.option.WSOpts.MaxEarlyData,
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EarlyDataHeaderName: v.option.WSOpts.EarlyDataHeaderName,
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}
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if len(v.option.WSOpts.Headers) != 0 {
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header := http.Header{}
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for key, value := range v.option.WSOpts.Headers {
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header.Add(key, value)
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}
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wsOpts.Headers = header
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}
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if v.option.TLS {
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wsOpts.TLS = true
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wsOpts.TLSConfig = &tls.Config{
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ServerName: host,
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InsecureSkipVerify: v.option.SkipCertVerify,
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NextProtos: []string{"http/1.1"},
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}
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if v.option.ServerName != "" {
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wsOpts.TLSConfig.ServerName = v.option.ServerName
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} else if host := wsOpts.Headers.Get("Host"); host != "" {
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wsOpts.TLSConfig.ServerName = host
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}
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}
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c, err = vmess.StreamWebsocketConn(c, wsOpts)
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case "http":
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// readability first, so just copy default TLS logic
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c, err = v.streamTLSOrXTLSConn(c, false)
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if err != nil {
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return nil, err
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}
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host, _, _ := net.SplitHostPort(v.addr)
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httpOpts := &vmess.HTTPConfig{
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Host: host,
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Method: v.option.HTTPOpts.Method,
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Path: v.option.HTTPOpts.Path,
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Headers: v.option.HTTPOpts.Headers,
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}
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c = vmess.StreamHTTPConn(c, httpOpts)
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case "h2":
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c, err = v.streamTLSOrXTLSConn(c, true)
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if err != nil {
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return nil, err
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}
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h2Opts := &vmess.H2Config{
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Hosts: v.option.HTTP2Opts.Host,
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Path: v.option.HTTP2Opts.Path,
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}
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c, err = vmess.StreamH2Conn(c, h2Opts)
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case "grpc":
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if v.isXTLSEnabled() {
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c, err = gun.StreamGunWithXTLSConn(c, v.gunTLSConfig, v.gunConfig)
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} else {
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c, err = gun.StreamGunWithConn(c, v.gunTLSConfig, v.gunConfig)
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}
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default:
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// handle TLS And XTLS
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c, err = v.streamTLSOrXTLSConn(c, true)
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}
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if err != nil {
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return nil, err
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}
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return v.client.StreamConn(c, parseVlessAddr(metadata))
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}
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func (v *Vless) streamTLSOrXTLSConn(conn net.Conn, isH2 bool) (net.Conn, error) {
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host, _, _ := net.SplitHostPort(v.addr)
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if v.isXTLSEnabled() {
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xtlsOpts := vless.XTLSConfig{
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Host: host,
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SkipCertVerify: v.option.SkipCertVerify,
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}
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if isH2 {
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xtlsOpts.NextProtos = []string{"h2"}
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}
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if v.option.ServerName != "" {
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xtlsOpts.Host = v.option.ServerName
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}
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return vless.StreamXTLSConn(conn, &xtlsOpts)
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} else if v.option.TLS {
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tlsOpts := vmess.TLSConfig{
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Host: host,
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SkipCertVerify: v.option.SkipCertVerify,
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}
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if isH2 {
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tlsOpts.NextProtos = []string{"h2"}
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}
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if v.option.ServerName != "" {
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tlsOpts.Host = v.option.ServerName
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}
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return vmess.StreamTLSConn(conn, &tlsOpts)
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}
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return conn, nil
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}
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func (v *Vless) isXTLSEnabled() bool {
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return v.client.Addons != nil
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}
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// DialContext implements C.ProxyAdapter
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func (v *Vless) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
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// gun transport
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if v.transport != nil {
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c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
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if err != nil {
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return nil, err
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}
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defer safeConnClose(c, err)
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c, err = v.client.StreamConn(c, parseVlessAddr(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, v), nil
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}
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c, err := dialer.DialContext(ctx, "tcp", v.addr)
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
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}
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tcpKeepAlive(c)
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defer safeConnClose(c, err)
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c, err = v.StreamConn(c, metadata)
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return NewConn(c, v), err
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}
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// ListenPacketContext implements C.ProxyAdapter
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func (v *Vless) ListenPacketContext(ctx context.Context, metadata *C.Metadata) (_ C.PacketConn, err error) {
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// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
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if !metadata.Resolved() {
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ip, err := resolver.ResolveIP(metadata.Host)
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if err != nil {
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return nil, errors.New("can't resolve ip")
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}
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metadata.DstIP = ip
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}
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var c net.Conn
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// gun transport
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if v.transport != nil {
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c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
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if err != nil {
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return nil, err
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}
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defer safeConnClose(c, err)
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c, err = v.client.StreamConn(c, parseVlessAddr(metadata))
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} else {
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c, err = dialer.DialContext(ctx, "tcp", v.addr)
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
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}
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tcpKeepAlive(c)
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defer safeConnClose(c, err)
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c, err = v.StreamConn(c, metadata)
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}
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if err != nil {
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return nil, fmt.Errorf("new vmess client error: %v", err)
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}
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return newPacketConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
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}
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func parseVlessAddr(metadata *C.Metadata) *vless.DstAddr {
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var addrType byte
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var addr []byte
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switch metadata.AddrType {
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case C.AtypIPv4:
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addrType = byte(vless.AtypIPv4)
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addr = make([]byte, net.IPv4len)
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copy(addr[:], metadata.DstIP.To4())
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case C.AtypIPv6:
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addrType = byte(vless.AtypIPv6)
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addr = make([]byte, net.IPv6len)
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copy(addr[:], metadata.DstIP.To16())
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case C.AtypDomainName:
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addrType = byte(vless.AtypDomainName)
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addr = make([]byte, len(metadata.Host)+1)
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addr[0] = byte(len(metadata.Host))
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copy(addr[1:], []byte(metadata.Host))
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}
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port, _ := strconv.Atoi(metadata.DstPort)
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return &vless.DstAddr{
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UDP: metadata.NetWork == C.UDP,
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AddrType: addrType,
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Addr: addr,
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Port: uint(port),
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}
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}
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type vlessPacketConn struct {
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net.Conn
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rAddr net.Addr
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}
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func (uc *vlessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
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return uc.Conn.Write(b)
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}
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func (uc *vlessPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
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n, err := uc.Conn.Read(b)
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return n, uc.rAddr, err
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}
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func NewVless(option VlessOption) (*Vless, error) {
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var addons *vless.Addons
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if option.Network != "ws" && len(option.Flow) >= 16 {
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option.Flow = option.Flow[:16]
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switch option.Flow {
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case vless.XRO, vless.XRD, vless.XRS:
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addons = &vless.Addons{
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Flow: option.Flow,
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}
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default:
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return nil, fmt.Errorf("unsupported vless flow type: %s", option.Flow)
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}
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}
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option.TLS = true
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client, err := vless.NewClient(option.UUID, addons, option.FlowShow)
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if err != nil {
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return nil, err
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}
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v := &Vless{
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Base: &Base{
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name: option.Name,
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addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
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tp: C.Vless,
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udp: option.UDP,
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},
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client: client,
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option: &option,
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}
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switch option.Network {
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case "h2":
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if len(option.HTTP2Opts.Host) == 0 {
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option.HTTP2Opts.Host = append(option.HTTP2Opts.Host, "www.example.com")
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}
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case "grpc":
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dialFn := func(network, addr string) (net.Conn, error) {
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c, err := dialer.DialContext(context.Background(), "tcp", v.addr)
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if err != nil {
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return nil, fmt.Errorf("%s connect error: %s", v.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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gunConfig := &gun.Config{
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ServiceName: v.option.GrpcOpts.GrpcServiceName,
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Host: v.option.ServerName,
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}
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tlsConfig := &tls.Config{
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InsecureSkipVerify: false,
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ServerName: v.option.ServerName,
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}
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if v.option.ServerName == "" {
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host, _, _ := net.SplitHostPort(v.addr)
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tlsConfig.ServerName = host
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gunConfig.Host = host
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}
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v.gunTLSConfig = tlsConfig
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v.gunConfig = gunConfig
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if v.isXTLSEnabled() {
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v.transport = gun.NewHTTP2XTLSClient(dialFn, tlsConfig)
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} else {
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v.transport = gun.NewHTTP2Client(dialFn, tlsConfig)
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}
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}
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return v, nil
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}
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