mirror of
https://gitclone.com/github.com/MetaCubeX/Clash.Meta
synced 2024-11-15 13:41:23 +08:00
2ee0f634e6
Currently only support TLS transport in TCP/GRPC/WS/HTTP for VLESS/Vmess and trojan-grpc.
467 lines
13 KiB
Go
467 lines
13 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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"strings"
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"sync"
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"github.com/Dreamacro/clash/component/dialer"
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"github.com/Dreamacro/clash/component/resolver"
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tlsC "github.com/Dreamacro/clash/component/tls"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/transport/gun"
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clashVMess "github.com/Dreamacro/clash/transport/vmess"
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vmess "github.com/sagernet/sing-vmess"
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"github.com/sagernet/sing-vmess/packetaddr"
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M "github.com/sagernet/sing/common/metadata"
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)
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var ErrUDPRemoteAddrMismatch = errors.New("udp packet dropped due to mismatched remote address")
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type Vmess struct {
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*Base
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client *vmess.Client
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option *VmessOption
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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 *gun.TransportWrap
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}
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type VmessOption struct {
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BasicOption
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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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AlterID int `proxy:"alterId"`
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Cipher string `proxy:"cipher"`
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UDP bool `proxy:"udp,omitempty"`
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Network string `proxy:"network,omitempty"`
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TLS bool `proxy:"tls,omitempty"`
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SkipCertVerify bool `proxy:"skip-cert-verify,omitempty"`
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Fingerprint string `proxy:"fingerprint,omitempty"`
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ServerName string `proxy:"servername,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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PacketAddr bool `proxy:"packet-addr,omitempty"`
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XUDP bool `proxy:"xudp,omitempty"`
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PacketEncoding string `proxy:"packet-encoding,omitempty"`
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GlobalPadding bool `proxy:"global-padding,omitempty"`
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AuthenticatedLength bool `proxy:"authenticated-length,omitempty"`
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ClientFingerprint string `proxy:"client-fingerprint,omitempty"`
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}
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type HTTPOptions struct {
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Method string `proxy:"method,omitempty"`
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Path []string `proxy:"path,omitempty"`
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Headers map[string][]string `proxy:"headers,omitempty"`
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}
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type HTTP2Options struct {
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Host []string `proxy:"host,omitempty"`
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Path string `proxy:"path,omitempty"`
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}
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type GrpcOptions struct {
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GrpcServiceName string `proxy:"grpc-service-name,omitempty"`
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}
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type WSOptions struct {
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Path string `proxy:"path,omitempty"`
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Headers map[string]string `proxy:"headers,omitempty"`
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MaxEarlyData int `proxy:"max-early-data,omitempty"`
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EarlyDataHeaderName string `proxy:"early-data-header-name,omitempty"`
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}
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// StreamConn implements C.ProxyAdapter
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func (v *Vmess) 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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host, port, _ := net.SplitHostPort(v.addr)
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wsOpts := &clashVMess.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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ClientFingerprint: v.option.ClientFingerprint,
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Headers: http.Header{},
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}
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if len(v.option.WSOpts.Headers) != 0 {
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for key, value := range v.option.WSOpts.Headers {
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wsOpts.Headers.Add(key, value)
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}
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}
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if v.option.TLS {
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wsOpts.TLS = true
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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 len(v.option.Fingerprint) == 0 {
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wsOpts.TLSConfig = tlsC.GetGlobalTLSConfig(tlsConfig)
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} else {
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if wsOpts.TLSConfig, err = tlsC.GetSpecifiedFingerprintTLSConfig(tlsConfig, v.option.Fingerprint); err != nil {
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return nil, err
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}
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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 = clashVMess.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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if v.option.TLS {
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host, _, _ := net.SplitHostPort(v.addr)
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tlsOpts := &clashVMess.TLSConfig{
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Host: host,
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SkipCertVerify: v.option.SkipCertVerify,
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ClientFingerprint: v.option.ClientFingerprint,
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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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c, err = clashVMess.StreamTLSConn(c, tlsOpts)
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if err != nil {
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return nil, err
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}
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}
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host, _, _ := net.SplitHostPort(v.addr)
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httpOpts := &clashVMess.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 = clashVMess.StreamHTTPConn(c, httpOpts)
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case "h2":
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host, _, _ := net.SplitHostPort(v.addr)
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tlsOpts := clashVMess.TLSConfig{
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Host: host,
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SkipCertVerify: v.option.SkipCertVerify,
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NextProtos: []string{"h2"},
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ClientFingerprint: v.option.ClientFingerprint,
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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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c, err = clashVMess.StreamTLSConn(c, &tlsOpts)
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if err != nil {
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return nil, err
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}
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h2Opts := &clashVMess.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 = clashVMess.StreamH2Conn(c, h2Opts)
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case "grpc":
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c, err = gun.StreamGunWithConn(c, v.gunTLSConfig, v.gunConfig)
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default:
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// handle TLS
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if v.option.TLS {
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host, _, _ := net.SplitHostPort(v.addr)
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tlsOpts := &clashVMess.TLSConfig{
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Host: host,
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SkipCertVerify: v.option.SkipCertVerify,
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ClientFingerprint: v.option.ClientFingerprint,
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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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c, err = clashVMess.StreamTLSConn(c, tlsOpts)
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}
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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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if metadata.NetWork == C.UDP {
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if v.option.XUDP {
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return v.client.DialXUDPPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
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} else {
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return v.client.DialPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
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}
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} else {
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return v.client.DialConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
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}
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}
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// DialContext implements C.ProxyAdapter
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func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
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// gun transport
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if v.transport != nil && len(opts) == 0 {
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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 func(c net.Conn) {
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safeConnClose(c, err)
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}(c)
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c, err = v.client.DialConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
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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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return v.DialContextWithDialer(ctx, dialer.NewDialer(v.Base.DialOptions(opts...)...), metadata)
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}
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// DialContextWithDialer implements C.ProxyAdapter
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func (v *Vmess) DialContextWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.Conn, err error) {
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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 func(c net.Conn) {
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safeConnClose(c, err)
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}(c)
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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 *Vmess) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
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// vmess use stream-oriented udp with a special address, so we need a net.UDPAddr
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if !metadata.Resolved() {
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ip, err := resolver.ResolveIP(ctx, 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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if v.option.PacketAddr {
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_metadata := *metadata // make a copy
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metadata = &_metadata
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metadata.Host = packetaddr.SeqPacketMagicAddress
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metadata.DstPort = "443"
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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 && len(opts) == 0 {
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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 func(c net.Conn) {
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safeConnClose(c, err)
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}(c)
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if v.option.XUDP {
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c, err = v.client.DialXUDPPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
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} else {
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c, err = v.client.DialPacketConn(c, M.ParseSocksaddr(metadata.RemoteAddress()))
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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 v.ListenPacketOnStreamConn(c, metadata)
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}
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return v.ListenPacketWithDialer(ctx, dialer.NewDialer(v.Base.DialOptions(opts...)...), metadata)
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}
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// ListenPacketWithDialer implements C.ProxyAdapter
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func (v *Vmess) ListenPacketWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.PacketConn, err error) {
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// vmess use stream-oriented udp with a special address, so we need a net.UDPAddr
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if !metadata.Resolved() {
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ip, err := resolver.ResolveIP(ctx, 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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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 func(c net.Conn) {
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safeConnClose(c, err)
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}(c)
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c, err = v.StreamConn(c, metadata)
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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 v.ListenPacketOnStreamConn(c, metadata)
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}
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// SupportWithDialer implements C.ProxyAdapter
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func (v *Vmess) SupportWithDialer() bool {
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return true
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}
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// ListenPacketOnStreamConn implements C.ProxyAdapter
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func (v *Vmess) ListenPacketOnStreamConn(c net.Conn, metadata *C.Metadata) (_ C.PacketConn, err error) {
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if v.option.PacketAddr {
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return newPacketConn(&threadSafePacketConn{PacketConn: packetaddr.NewBindConn(c)}, v), nil
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} else if pc, ok := c.(net.PacketConn); ok {
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return newPacketConn(&threadSafePacketConn{PacketConn: pc}, v), nil
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}
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return newPacketConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
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}
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// SupportUOT implements C.ProxyAdapter
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func (v *Vmess) SupportUOT() bool {
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return true
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}
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func NewVmess(option VmessOption) (*Vmess, error) {
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security := strings.ToLower(option.Cipher)
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var options []vmess.ClientOption
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if option.GlobalPadding {
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options = append(options, vmess.ClientWithGlobalPadding())
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}
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if option.AuthenticatedLength {
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options = append(options, vmess.ClientWithAuthenticatedLength())
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}
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client, err := vmess.NewClient(option.UUID, security, option.AlterID, options...)
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if err != nil {
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return nil, err
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}
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switch option.PacketEncoding {
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case "packetaddr", "packet":
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option.PacketAddr = true
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case "xudp":
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option.XUDP = true
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}
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if option.XUDP {
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option.PacketAddr = false
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}
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switch option.Network {
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case "h2", "grpc":
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if !option.TLS {
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option.TLS = true
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}
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}
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v := &Vmess{
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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.Vmess,
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udp: option.UDP,
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xudp: option.XUDP,
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iface: option.Interface,
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rmark: option.RoutingMark,
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prefer: C.NewDNSPrefer(option.IPVersion),
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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, v.Base.DialOptions()...)
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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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ClientFingerprint: v.option.ClientFingerprint,
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}
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tlsConfig := &tls.Config{
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InsecureSkipVerify: v.option.SkipCertVerify,
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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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v.transport = gun.NewHTTP2Client(dialFn, tlsConfig, v.option.ClientFingerprint)
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}
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return v, nil
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}
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type threadSafePacketConn struct {
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net.PacketConn
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access sync.Mutex
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}
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func (c *threadSafePacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
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c.access.Lock()
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defer c.access.Unlock()
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return c.PacketConn.WriteTo(b, addr)
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}
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type vmessPacketConn struct {
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net.Conn
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rAddr net.Addr
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access sync.Mutex
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}
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// WriteTo implments C.PacketConn.WriteTo
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// Since VMess doesn't support full cone NAT by design, we verify if addr matches uc.rAddr, and drop the packet if not.
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func (uc *vmessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
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allowedAddr := uc.rAddr.(*net.UDPAddr)
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destAddr := addr.(*net.UDPAddr)
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if !(allowedAddr.IP.Equal(destAddr.IP) && allowedAddr.Port == destAddr.Port) {
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return 0, ErrUDPRemoteAddrMismatch
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}
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uc.access.Lock()
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defer uc.access.Unlock()
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return uc.Conn.Write(b)
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}
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func (uc *vmessPacketConn) 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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