mirror of
https://gitclone.com/github.com/MetaCubeX/Clash.Meta
synced 2024-11-15 05:31:18 +08:00
629 lines
16 KiB
Go
629 lines
16 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/binary"
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"errors"
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"fmt"
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"io"
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"net"
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"net/http"
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"strconv"
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"sync"
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"github.com/Dreamacro/clash/common/convert"
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N "github.com/Dreamacro/clash/common/net"
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"github.com/Dreamacro/clash/common/utils"
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"github.com/Dreamacro/clash/component/dialer"
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"github.com/Dreamacro/clash/component/proxydialer"
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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/log"
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"github.com/Dreamacro/clash/transport/gun"
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"github.com/Dreamacro/clash/transport/socks5"
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"github.com/Dreamacro/clash/transport/vless"
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"github.com/Dreamacro/clash/transport/vmess"
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vmessSing "github.com/metacubex/sing-vmess"
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"github.com/metacubex/sing-vmess/packetaddr"
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M "github.com/sagernet/sing/common/metadata"
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)
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const (
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// max packet length
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maxLength = 1024 << 3
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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 *gun.TransportWrap
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realityConfig *tlsC.RealityConfig
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}
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type VlessOption 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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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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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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Network string `proxy:"network,omitempty"`
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RealityOpts RealityOptions `proxy:"reality-opts,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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Fingerprint string `proxy:"fingerprint,omitempty"`
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ServerName string `proxy:"servername,omitempty"`
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ClientFingerprint string `proxy:"client-fingerprint,omitempty"`
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}
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func (v *Vless) StreamConnContext(ctx context.Context, c net.Conn, metadata *C.Metadata) (net.Conn, error) {
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var err error
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if tlsC.HaveGlobalFingerprint() && len(v.option.ClientFingerprint) == 0 {
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v.option.ClientFingerprint = tlsC.GetGlobalFingerprint()
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}
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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 := &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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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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MinVersion: tls.VersionTLS12,
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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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wsOpts.TLSConfig, err = tlsC.GetSpecifiedFingerprintTLSConfig(tlsConfig, v.option.Fingerprint)
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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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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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} else {
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if host := wsOpts.Headers.Get("Host"); host == "" {
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wsOpts.Headers.Set("Host", convert.RandHost())
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convert.SetUserAgent(wsOpts.Headers)
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}
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}
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c, err = vmess.StreamWebsocketConn(ctx, 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(ctx, 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(ctx, 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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c, err = gun.StreamGunWithConn(c, v.gunTLSConfig, v.gunConfig, v.realityConfig)
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default:
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// default tcp network
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// handle TLS And XTLS
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c, err = v.streamTLSOrXTLSConn(ctx, c, false)
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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.streamConn(c, metadata)
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}
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func (v *Vless) streamConn(c net.Conn, metadata *C.Metadata) (conn net.Conn, err error) {
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if metadata.NetWork == C.UDP {
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if v.option.PacketAddr {
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metadata = &C.Metadata{
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NetWork: C.UDP,
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Host: packetaddr.SeqPacketMagicAddress,
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DstPort: "443",
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}
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} else {
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metadata = &C.Metadata{ // a clear metadata only contains ip
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NetWork: C.UDP,
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DstIP: metadata.DstIP,
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DstPort: metadata.DstPort,
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}
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}
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conn, err = v.client.StreamConn(c, parseVlessAddr(metadata, v.option.XUDP))
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if v.option.PacketAddr {
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conn = packetaddr.NewBindConn(conn)
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}
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} else {
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conn, err = v.client.StreamConn(c, parseVlessAddr(metadata, false))
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}
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if err != nil {
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conn = nil
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}
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return
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}
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func (v *Vless) streamTLSOrXTLSConn(ctx context.Context, conn net.Conn, isH2 bool) (net.Conn, error) {
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host, _, _ := net.SplitHostPort(v.addr)
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if v.isLegacyXTLSEnabled() && !isH2 {
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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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Fingerprint: v.option.Fingerprint,
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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(ctx, 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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FingerPrint: v.option.Fingerprint,
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ClientFingerprint: v.option.ClientFingerprint,
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Reality: v.realityConfig,
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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(ctx, conn, &tlsOpts)
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}
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return conn, nil
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}
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func (v *Vless) isLegacyXTLSEnabled() bool {
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return v.client.Addons != nil && v.client.Addons.Flow != vless.XRV
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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, 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.StreamConn(c, parseVlessAddr(metadata, v.option.XUDP))
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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 *Vless) DialContextWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.Conn, err error) {
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if len(v.option.DialerProxy) > 0 {
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dialer, err = proxydialer.NewByName(v.option.DialerProxy, dialer)
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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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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.StreamConnContext(ctx, c, metadata)
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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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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, opts ...dialer.Option) (_ C.PacketConn, err error) {
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// vless 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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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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c, err = v.streamConn(c, metadata)
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if err != nil {
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return nil, fmt.Errorf("new vless client error: %v", err)
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}
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return v.ListenPacketOnStreamConn(ctx, 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 *Vless) ListenPacketWithDialer(ctx context.Context, dialer C.Dialer, metadata *C.Metadata) (_ C.PacketConn, err error) {
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if len(v.option.DialerProxy) > 0 {
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dialer, err = proxydialer.NewByName(v.option.DialerProxy, dialer)
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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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// vless 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.StreamConnContext(ctx, c, metadata)
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if err != nil {
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return nil, fmt.Errorf("new vless client error: %v", err)
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}
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return v.ListenPacketOnStreamConn(ctx, c, metadata)
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}
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// SupportWithDialer implements C.ProxyAdapter
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func (v *Vless) SupportWithDialer() C.NetWork {
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return C.ALLNet
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}
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// ListenPacketOnStreamConn implements C.ProxyAdapter
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func (v *Vless) ListenPacketOnStreamConn(ctx context.Context, c net.Conn, metadata *C.Metadata) (_ C.PacketConn, err error) {
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// vless 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.XUDP {
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var globalID [8]byte
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if metadata.SourceValid() {
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globalID = utils.GlobalID(metadata.SourceAddress())
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}
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return newPacketConn(N.NewThreadSafePacketConn(
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vmessSing.NewXUDPConn(c,
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globalID,
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M.SocksaddrFromNet(metadata.UDPAddr())),
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), v), nil
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} else if v.option.PacketAddr {
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return newPacketConn(N.NewThreadSafePacketConn(
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packetaddr.NewConn(&vlessPacketConn{
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Conn: c, rAddr: metadata.UDPAddr(),
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}, M.SocksaddrFromNet(metadata.UDPAddr())),
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), v), nil
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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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|
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// SupportUOT implements C.ProxyAdapter
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func (v *Vless) SupportUOT() bool {
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return true
|
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}
|
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|
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func parseVlessAddr(metadata *C.Metadata, xudp bool) *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 socks5.AtypIPv4:
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addrType = vless.AtypIPv4
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addr = make([]byte, net.IPv4len)
|
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copy(addr[:], metadata.DstIP.AsSlice())
|
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case socks5.AtypIPv6:
|
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addrType = vless.AtypIPv6
|
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addr = make([]byte, net.IPv6len)
|
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copy(addr[:], metadata.DstIP.AsSlice())
|
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case socks5.AtypDomainName:
|
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addrType = 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:], metadata.Host)
|
|
}
|
|
|
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port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
|
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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: uint16(port),
|
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Mux: metadata.NetWork == C.UDP && xudp,
|
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}
|
|
}
|
|
|
|
type vlessPacketConn struct {
|
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net.Conn
|
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rAddr net.Addr
|
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remain int
|
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mux sync.Mutex
|
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cache [2]byte
|
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}
|
|
|
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func (c *vlessPacketConn) writePacket(payload []byte) (int, error) {
|
|
binary.BigEndian.PutUint16(c.cache[:], uint16(len(payload)))
|
|
|
|
if _, err := c.Conn.Write(c.cache[:]); err != nil {
|
|
return 0, err
|
|
}
|
|
|
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return c.Conn.Write(payload)
|
|
}
|
|
|
|
func (c *vlessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
|
|
total := len(b)
|
|
if total == 0 {
|
|
return 0, nil
|
|
}
|
|
|
|
if total <= maxLength {
|
|
return c.writePacket(b)
|
|
}
|
|
|
|
offset := 0
|
|
|
|
for offset < total {
|
|
cursor := offset + maxLength
|
|
if cursor > total {
|
|
cursor = total
|
|
}
|
|
|
|
n, err := c.writePacket(b[offset:cursor])
|
|
if err != nil {
|
|
return offset + n, err
|
|
}
|
|
|
|
offset = cursor
|
|
if offset == total {
|
|
break
|
|
}
|
|
}
|
|
|
|
return total, nil
|
|
}
|
|
|
|
func (c *vlessPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
|
|
c.mux.Lock()
|
|
defer c.mux.Unlock()
|
|
|
|
if c.remain > 0 {
|
|
length := len(b)
|
|
if c.remain < length {
|
|
length = c.remain
|
|
}
|
|
|
|
n, err := c.Conn.Read(b[:length])
|
|
if err != nil {
|
|
return 0, c.rAddr, err
|
|
}
|
|
|
|
c.remain -= n
|
|
return n, c.rAddr, nil
|
|
}
|
|
|
|
if _, err := c.Conn.Read(b[:2]); err != nil {
|
|
return 0, c.rAddr, err
|
|
}
|
|
|
|
total := int(binary.BigEndian.Uint16(b[:2]))
|
|
if total == 0 {
|
|
return 0, c.rAddr, nil
|
|
}
|
|
|
|
length := len(b)
|
|
if length > total {
|
|
length = total
|
|
}
|
|
|
|
if _, err := io.ReadFull(c.Conn, b[:length]); err != nil {
|
|
return 0, c.rAddr, errors.New("read packet error")
|
|
}
|
|
|
|
c.remain = total - length
|
|
|
|
return length, c.rAddr, nil
|
|
}
|
|
|
|
func NewVless(option VlessOption) (*Vless, error) {
|
|
var addons *vless.Addons
|
|
if option.Network != "ws" && len(option.Flow) >= 16 {
|
|
option.Flow = option.Flow[:16]
|
|
switch option.Flow {
|
|
case vless.XRV:
|
|
log.Warnln("To use %s, ensure your server is upgrade to Xray-core v1.8.0+", vless.XRV)
|
|
fallthrough
|
|
case vless.XRO, vless.XRD, vless.XRS:
|
|
addons = &vless.Addons{
|
|
Flow: option.Flow,
|
|
}
|
|
default:
|
|
return nil, fmt.Errorf("unsupported xtls flow type: %s", option.Flow)
|
|
}
|
|
}
|
|
|
|
switch option.PacketEncoding {
|
|
case "packetaddr", "packet":
|
|
option.PacketAddr = true
|
|
option.XUDP = false
|
|
default: // https://github.com/XTLS/Xray-core/pull/1567#issuecomment-1407305458
|
|
if !option.PacketAddr {
|
|
option.XUDP = true
|
|
}
|
|
}
|
|
if option.XUDP {
|
|
option.PacketAddr = false
|
|
}
|
|
|
|
client, err := vless.NewClient(option.UUID, addons, option.FlowShow)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
v := &Vless{
|
|
Base: &Base{
|
|
name: option.Name,
|
|
addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
|
|
tp: C.Vless,
|
|
udp: option.UDP,
|
|
xudp: option.XUDP,
|
|
tfo: option.TFO,
|
|
iface: option.Interface,
|
|
rmark: option.RoutingMark,
|
|
prefer: C.NewDNSPrefer(option.IPVersion),
|
|
},
|
|
client: client,
|
|
option: &option,
|
|
}
|
|
|
|
v.realityConfig, err = v.option.RealityOpts.Parse()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
switch option.Network {
|
|
case "h2":
|
|
if len(option.HTTP2Opts.Host) == 0 {
|
|
option.HTTP2Opts.Host = append(option.HTTP2Opts.Host, "www.example.com")
|
|
}
|
|
case "grpc":
|
|
dialFn := func(network, addr string) (net.Conn, error) {
|
|
var err error
|
|
var cDialer C.Dialer = dialer.NewDialer(v.Base.DialOptions()...)
|
|
if len(v.option.DialerProxy) > 0 {
|
|
cDialer, err = proxydialer.NewByName(v.option.DialerProxy, cDialer)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
c, err := cDialer.DialContext(context.Background(), "tcp", v.addr)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
|
|
}
|
|
tcpKeepAlive(c)
|
|
return c, nil
|
|
}
|
|
|
|
gunConfig := &gun.Config{
|
|
ServiceName: v.option.GrpcOpts.GrpcServiceName,
|
|
Host: v.option.ServerName,
|
|
ClientFingerprint: v.option.ClientFingerprint,
|
|
}
|
|
if option.ServerName == "" {
|
|
gunConfig.Host = v.addr
|
|
}
|
|
var tlsConfig *tls.Config
|
|
if option.TLS {
|
|
tlsConfig = tlsC.GetGlobalTLSConfig(&tls.Config{
|
|
InsecureSkipVerify: v.option.SkipCertVerify,
|
|
ServerName: v.option.ServerName,
|
|
})
|
|
if option.ServerName == "" {
|
|
host, _, _ := net.SplitHostPort(v.addr)
|
|
tlsConfig.ServerName = host
|
|
}
|
|
}
|
|
|
|
v.gunTLSConfig = tlsConfig
|
|
v.gunConfig = gunConfig
|
|
|
|
v.transport = gun.NewHTTP2Client(dialFn, tlsConfig, v.option.ClientFingerprint, v.realityConfig)
|
|
}
|
|
|
|
return v, nil
|
|
}
|