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chore: do websocket client upgrade directly instead of gobwas/ws
This commit is contained in:
wwqgtxx
parent
ee3038d5e4
commit
665ba7f9f1
@ -3,6 +3,7 @@ package vmess
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import (
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"bytes"
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"context"
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"crypto/sha1"
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"crypto/tls"
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"encoding/base64"
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"encoding/binary"
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@ -19,6 +20,7 @@ import (
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"github.com/Dreamacro/clash/common/buf"
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N "github.com/Dreamacro/clash/common/net"
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tlsC "github.com/Dreamacro/clash/component/tls"
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"github.com/Dreamacro/clash/log"
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"github.com/gobwas/ws"
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"github.com/gobwas/ws/wsutil"
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@ -317,35 +319,35 @@ func streamWebsocketWithEarlyDataConn(conn net.Conn, c *WebsocketConfig) (net.Co
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}
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func streamWebsocketConn(ctx context.Context, conn net.Conn, c *WebsocketConfig, earlyData *bytes.Buffer) (net.Conn, error) {
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dialer := ws.Dialer{
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NetDial: func(ctx context.Context, network, addr string) (net.Conn, error) {
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return conn, nil
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},
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TLSConfig: c.TLSConfig,
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u, err := url.Parse(c.Path)
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if err != nil {
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return nil, fmt.Errorf("parse url %s error: %w", c.Path, err)
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}
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scheme := "ws"
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if c.TLS {
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scheme = "wss"
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if len(c.ClientFingerprint) != 0 {
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if fingerprint, exists := tlsC.GetFingerprint(c.ClientFingerprint); exists {
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utlsConn := tlsC.UClient(conn, c.TLSConfig, fingerprint)
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if err := utlsConn.BuildWebsocketHandshakeState(); err != nil {
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if err = utlsConn.BuildWebsocketHandshakeState(); err != nil {
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return nil, fmt.Errorf("parse url %s error: %w", c.Path, err)
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}
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conn = utlsConn
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}
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} else {
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conn = tls.Client(conn, c.TLSConfig)
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}
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dialer.TLSClient = func(conn net.Conn, hostname string) net.Conn {
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return utlsConn
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}
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if tlsConn, ok := conn.(interface {
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HandshakeContext(ctx context.Context) error
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}); ok {
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if err = tlsConn.HandshakeContext(ctx); err != nil {
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return nil, err
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}
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}
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}
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u, err := url.Parse(c.Path)
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if err != nil {
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return nil, fmt.Errorf("parse url %s error: %w", c.Path, err)
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}
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uri := url.URL{
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Scheme: scheme,
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Host: net.JoinHostPort(c.Host, c.Port),
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@ -353,56 +355,36 @@ func streamWebsocketConn(ctx context.Context, conn net.Conn, c *WebsocketConfig,
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RawQuery: u.RawQuery,
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}
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if c.V2rayHttpUpgrade {
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if c.TLS {
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if dialer.TLSClient != nil {
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conn = dialer.TLSClient(conn, uri.Host)
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} else {
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conn = tls.Client(conn, dialer.TLSConfig)
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}
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if tlsConn, ok := conn.(interface {
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HandshakeContext(ctx context.Context) error
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}); ok {
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if err = tlsConn.HandshakeContext(ctx); err != nil {
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return nil, err
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}
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}
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}
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request := &http.Request{
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Method: http.MethodGet,
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URL: &uri,
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Header: c.Headers.Clone(),
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Host: c.Host,
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}
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request.Header.Set("Connection", "Upgrade")
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request.Header.Set("Upgrade", "websocket")
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if host := request.Header.Get("Host"); host != "" {
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request.Header.Del("Host")
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request.Host = host
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}
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err = request.Write(conn)
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if err != nil {
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return nil, err
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}
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bufferedConn := N.NewBufferedConn(conn)
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response, err := http.ReadResponse(bufferedConn.Reader(), request)
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if err != nil {
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return nil, err
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}
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if response.StatusCode != 101 ||
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!strings.EqualFold(response.Header.Get("Connection"), "upgrade") ||
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!strings.EqualFold(response.Header.Get("Upgrade"), "websocket") {
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return nil, fmt.Errorf("unexpected status: %s", response.Status)
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}
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return bufferedConn, nil
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request := &http.Request{
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Method: http.MethodGet,
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URL: &uri,
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Header: c.Headers.Clone(),
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Host: c.Host,
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}
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headers := http.Header{}
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headers.Set("User-Agent", "Go-http-client/1.1") // match golang's net/http
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if c.Headers != nil {
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for k := range c.Headers {
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headers.Add(k, c.Headers.Get(k))
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request.Header.Set("Connection", "Upgrade")
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request.Header.Set("Upgrade", "websocket")
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if host := request.Header.Get("Host"); host != "" {
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// For client requests, Host optionally overrides the Host
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// header to send. If empty, the Request.Write method uses
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// the value of URL.Host. Host may contain an international
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// domain name.
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request.Host = host
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}
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request.Header.Del("Host")
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var nonce string
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if !c.V2rayHttpUpgrade {
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const nonceKeySize = 16
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// NOTE: bts does not escape.
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bts := make([]byte, nonceKeySize)
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if _, err = fastrand.Read(bts); err != nil {
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return nil, fmt.Errorf("rand read error: %w", err)
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}
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nonce = base64.StdEncoding.EncodeToString(bts)
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request.Header.Set("Sec-WebSocket-Version", "13")
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request.Header.Set("Sec-WebSocket-Key", nonce)
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}
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if earlyData != nil {
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@ -410,36 +392,51 @@ func streamWebsocketConn(ctx context.Context, conn net.Conn, c *WebsocketConfig,
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if c.EarlyDataHeaderName == "" {
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uri.Path += earlyDataString
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} else {
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headers.Set(c.EarlyDataHeaderName, earlyDataString)
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request.Header.Set(c.EarlyDataHeaderName, earlyDataString)
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}
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}
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// gobwas/ws will check server's response "Sec-Websocket-Protocol" so must add Protocols to ws.Dialer
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// if not will cause ws.ErrHandshakeBadSubProtocol
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if secProtocol := headers.Get("Sec-WebSocket-Protocol"); len(secProtocol) > 0 {
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// gobwas/ws will set "Sec-Websocket-Protocol" according dialer.Protocols
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// to avoid send repeatedly don't set it to headers
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dialer.Protocols = []string{secProtocol}
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if ctx.Done() != nil {
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done := N.SetupContextForConn(ctx, conn)
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defer done(&err)
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}
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headers.Del("Sec-WebSocket-Protocol")
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// gobwas/ws send "Host" directly in Upgrade() by `httpWriteHeader(bw, headerHost, u.Host)`
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// if headers has "Host" will send repeatedly
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if host := headers.Get("Host"); host != "" {
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uri.Host = host
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}
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headers.Del("Host")
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dialer.Header = ws.HandshakeHeaderHTTP(headers)
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conn, reader, _, err := dialer.Dial(ctx, uri.String())
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err = request.Write(conn)
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if err != nil {
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return nil, fmt.Errorf("dial %s error: %w", uri.Host, err)
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return nil, err
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}
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bufferedConn := N.NewBufferedConn(conn)
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response, err := http.ReadResponse(bufferedConn.Reader(), request)
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if err != nil {
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return nil, err
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}
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if response.StatusCode != http.StatusSwitchingProtocols ||
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!strings.EqualFold(response.Header.Get("Connection"), "upgrade") ||
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!strings.EqualFold(response.Header.Get("Upgrade"), "websocket") {
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return nil, fmt.Errorf("unexpected status: %s", response.Status)
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}
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// some bytes which could be written by the peer right after response and be caught by us during buffered read,
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// so we need warp Conn with bio.Reader
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conn = N.WarpConnWithBioReader(conn, reader)
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if c.V2rayHttpUpgrade {
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return bufferedConn, nil
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}
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if log.Level() == log.DEBUG { // we might not check this for performance
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secAccept := response.Header.Get("Sec-Websocket-Accept")
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const acceptSize = 28 // base64.StdEncoding.EncodedLen(sha1.Size)
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if lenSecAccept := len(secAccept); lenSecAccept != acceptSize {
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return nil, fmt.Errorf("unexpected Sec-Websocket-Accept length: %d", lenSecAccept)
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}
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const magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
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const nonceSize = 24 // base64.StdEncoding.EncodedLen(nonceKeySize)
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p := make([]byte, nonceSize+len(magic))
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copy(p[:nonceSize], nonce)
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copy(p[nonceSize:], magic)
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sum := sha1.Sum(p)
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if accept := base64.StdEncoding.EncodeToString(sum[:]); accept != secAccept {
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return nil, errors.New("unexpected Sec-Websocket-Accept")
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}
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}
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conn = newWebsocketConn(conn, ws.StateClientSide)
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// websocketConn can't correct handle ReadDeadline
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