152 lines
3 KiB
Go
152 lines
3 KiB
Go
package vmess
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import (
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"crypto/tls"
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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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"net/url"
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"strings"
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"time"
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"github.com/gorilla/websocket"
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)
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type websocketConn struct {
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conn *websocket.Conn
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reader io.Reader
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remoteAddr net.Addr
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}
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type WebsocketConfig struct {
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Host string
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Path string
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Headers map[string]string
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TLS bool
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TLSConfig *tls.Config
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}
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// Read implements net.Conn.Read()
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func (wsc *websocketConn) Read(b []byte) (int, error) {
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for {
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reader, err := wsc.getReader()
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if err != nil {
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return 0, err
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}
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nBytes, err := reader.Read(b)
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if err == io.EOF {
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wsc.reader = nil
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continue
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}
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return nBytes, err
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}
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}
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// Write implements io.Writer.
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func (wsc *websocketConn) Write(b []byte) (int, error) {
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if err := wsc.conn.WriteMessage(websocket.BinaryMessage, b); err != nil {
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return 0, err
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}
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return len(b), nil
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}
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func (wsc *websocketConn) Close() error {
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var errors []string
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if err := wsc.conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(time.Second*5)); err != nil {
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errors = append(errors, err.Error())
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}
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if err := wsc.conn.Close(); err != nil {
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errors = append(errors, err.Error())
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}
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if len(errors) > 0 {
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return fmt.Errorf("Failed to close connection: %s", strings.Join(errors, ","))
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}
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return nil
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}
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func (wsc *websocketConn) getReader() (io.Reader, error) {
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if wsc.reader != nil {
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return wsc.reader, nil
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}
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_, reader, err := wsc.conn.NextReader()
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if err != nil {
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return nil, err
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}
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wsc.reader = reader
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return reader, nil
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}
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func (wsc *websocketConn) LocalAddr() net.Addr {
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return wsc.conn.LocalAddr()
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}
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func (wsc *websocketConn) RemoteAddr() net.Addr {
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return wsc.remoteAddr
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}
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func (wsc *websocketConn) SetDeadline(t time.Time) error {
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if err := wsc.SetReadDeadline(t); err != nil {
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return err
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}
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return wsc.SetWriteDeadline(t)
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}
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func (wsc *websocketConn) SetReadDeadline(t time.Time) error {
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return wsc.conn.SetReadDeadline(t)
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}
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func (wsc *websocketConn) SetWriteDeadline(t time.Time) error {
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return wsc.conn.SetWriteDeadline(t)
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}
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func NewWebsocketConn(conn net.Conn, c *WebsocketConfig) (net.Conn, error) {
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dialer := &websocket.Dialer{
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NetDial: func(network, addr string) (net.Conn, error) {
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return conn, nil
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},
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ReadBufferSize: 4 * 1024,
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WriteBufferSize: 4 * 1024,
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HandshakeTimeout: time.Second * 8,
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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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dialer.TLSClientConfig = c.TLSConfig
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}
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host, port, _ := net.SplitHostPort(c.Host)
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if (scheme == "ws" && port != "80") || (scheme == "wss" && port != "443") {
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host = c.Host
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}
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uri := url.URL{
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Scheme: scheme,
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Host: host,
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Path: c.Path,
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}
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headers := http.Header{}
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if c.Headers != nil {
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for k, v := range c.Headers {
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headers.Set(k, v)
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}
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}
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wsConn, resp, err := dialer.Dial(uri.String(), headers)
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if err != nil {
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var reason string
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if resp != nil {
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reason = resp.Status
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}
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return nil, fmt.Errorf("Dial %s error: %s", host, reason)
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}
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return &websocketConn{
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conn: wsConn,
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remoteAddr: conn.RemoteAddr(),
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}, nil
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}
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