mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-12-23 02:26:49 -05:00
119 lines
2.8 KiB
Go
119 lines
2.8 KiB
Go
package websocket
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import (
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"context"
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"crypto/tls"
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"net/http"
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"strconv"
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"sync"
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"time"
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"github.com/gorilla/websocket"
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"v2ray.com/core/common"
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"v2ray.com/core/common/net"
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http_proto "v2ray.com/core/common/protocol/http"
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"v2ray.com/core/transport/internet"
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v2tls "v2ray.com/core/transport/internet/tls"
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)
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type requestHandler struct {
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path string
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ln *Listener
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}
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var upgrader = &websocket.Upgrader{
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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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func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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if request.URL.Path != h.path {
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writer.WriteHeader(http.StatusNotFound)
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return
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}
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conn, err := upgrader.Upgrade(writer, request, nil)
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if err != nil {
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newError("failed to convert to WebSocket connection").Base(err).WriteToLog()
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return
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}
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forwardedAddrs := http_proto.ParseXForwardedFor(request.Header)
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remoteAddr := conn.RemoteAddr()
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if len(forwardedAddrs) > 0 && forwardedAddrs[0].Family().Either(net.AddressFamilyIPv4, net.AddressFamilyIPv6) {
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remoteAddr.(*net.TCPAddr).IP = forwardedAddrs[0].IP()
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}
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h.ln.addConn(newConnection(conn, remoteAddr))
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}
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type Listener struct {
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sync.Mutex
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listener net.Listener
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tlsConfig *tls.Config
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config *Config
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addConn internet.ConnHandler
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}
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func ListenWS(ctx context.Context, address net.Address, port net.Port, addConn internet.ConnHandler) (internet.Listener, error) {
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networkSettings := internet.TransportSettingsFromContext(ctx)
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wsSettings := networkSettings.(*Config)
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l := &Listener{
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config: wsSettings,
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addConn: addConn,
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}
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if config := v2tls.ConfigFromContext(ctx); config != nil {
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l.tlsConfig = config.GetTLSConfig()
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}
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err := l.listenws(address, port)
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return l, err
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}
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func (ln *Listener) listenws(address net.Address, port net.Port) error {
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netAddr := address.String() + ":" + strconv.Itoa(int(port.Value()))
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var listener net.Listener
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if ln.tlsConfig == nil {
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l, err := net.Listen("tcp", netAddr)
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if err != nil {
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return newError("failed to listen TCP ", netAddr).Base(err)
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}
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listener = l
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} else {
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l, err := tls.Listen("tcp", netAddr, ln.tlsConfig)
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if err != nil {
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return newError("failed to listen TLS ", netAddr).Base(err)
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}
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listener = l
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}
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ln.listener = listener
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go func() {
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err := http.Serve(listener, &requestHandler{
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path: ln.config.GetNormalizedPath(),
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ln: ln,
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})
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if err != nil {
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newError("failed to serve http for WebSocket").Base(err).AtWarning().WriteToLog()
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}
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}()
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return nil
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}
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// Addr implements net.Listener.Addr().
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func (ln *Listener) Addr() net.Addr {
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return ln.listener.Addr()
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}
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// Close implements net.Listener.Close().
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func (ln *Listener) Close() error {
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return ln.listener.Close()
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}
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func init() {
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common.Must(internet.RegisterTransportListener(internet.TransportProtocol_WebSocket, ListenWS))
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}
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