mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-12-22 18:17:52 -05:00
123 lines
2.9 KiB
Go
123 lines
2.9 KiB
Go
package websocket
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"net/http"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/gorilla/websocket"
|
|
|
|
"v2ray.com/core/common"
|
|
"v2ray.com/core/common/net"
|
|
http_proto "v2ray.com/core/common/protocol/http"
|
|
"v2ray.com/core/common/session"
|
|
"v2ray.com/core/transport/internet"
|
|
v2tls "v2ray.com/core/transport/internet/tls"
|
|
)
|
|
|
|
type requestHandler struct {
|
|
path string
|
|
ln *Listener
|
|
}
|
|
|
|
var upgrader = &websocket.Upgrader{
|
|
ReadBufferSize: 4 * 1024,
|
|
WriteBufferSize: 4 * 1024,
|
|
HandshakeTimeout: time.Second * 8,
|
|
}
|
|
|
|
func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
|
|
if request.URL.Path != h.path {
|
|
writer.WriteHeader(http.StatusNotFound)
|
|
return
|
|
}
|
|
conn, err := upgrader.Upgrade(writer, request, nil)
|
|
if err != nil {
|
|
newError("failed to convert to WebSocket connection").Base(err).WriteToLog()
|
|
return
|
|
}
|
|
|
|
forwardedAddrs := http_proto.ParseXForwardedFor(request.Header)
|
|
remoteAddr := conn.RemoteAddr()
|
|
if len(forwardedAddrs) > 0 && forwardedAddrs[0].Family().Either(net.AddressFamilyIPv4, net.AddressFamilyIPv6) {
|
|
remoteAddr.(*net.TCPAddr).IP = forwardedAddrs[0].IP()
|
|
}
|
|
|
|
h.ln.addConn(newConnection(conn, remoteAddr))
|
|
}
|
|
|
|
type Listener struct {
|
|
sync.Mutex
|
|
listener net.Listener
|
|
config *Config
|
|
addConn internet.ConnHandler
|
|
}
|
|
|
|
func ListenWS(ctx context.Context, address net.Address, port net.Port, addConn internet.ConnHandler) (internet.Listener, error) {
|
|
networkSettings := internet.StreamSettingsFromContext(ctx)
|
|
wsSettings := networkSettings.ProtocolSettings.(*Config)
|
|
|
|
var tlsConfig *tls.Config
|
|
if config := v2tls.ConfigFromContext(ctx); config != nil {
|
|
tlsConfig = config.GetTLSConfig()
|
|
}
|
|
|
|
listener, err := listenTCP(ctx, address, port, tlsConfig)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
l := &Listener{
|
|
config: wsSettings,
|
|
addConn: addConn,
|
|
listener: listener,
|
|
}
|
|
|
|
go func() {
|
|
if err := l.serve(); err != nil {
|
|
newError("failed to serve http for WebSocket").Base(err).AtWarning().WriteToLog(session.ExportIDToError(ctx))
|
|
}
|
|
}()
|
|
|
|
return l, err
|
|
}
|
|
|
|
func listenTCP(ctx context.Context, address net.Address, port net.Port, tlsConfig *tls.Config) (net.Listener, error) {
|
|
listener, err := internet.ListenSystem(ctx, &net.TCPAddr{
|
|
IP: address.IP(),
|
|
Port: int(port),
|
|
})
|
|
if err != nil {
|
|
return nil, newError("failed to listen TCP on", address, ":", port).Base(err)
|
|
}
|
|
|
|
if tlsConfig != nil {
|
|
return tls.NewListener(listener, tlsConfig), nil
|
|
}
|
|
|
|
return listener, nil
|
|
}
|
|
|
|
func (ln *Listener) serve() error {
|
|
return http.Serve(ln.listener, &requestHandler{
|
|
path: ln.config.GetNormalizedPath(),
|
|
ln: ln,
|
|
})
|
|
}
|
|
|
|
// Addr implements net.Listener.Addr().
|
|
func (ln *Listener) Addr() net.Addr {
|
|
return ln.listener.Addr()
|
|
}
|
|
|
|
// Close implements net.Listener.Close().
|
|
func (ln *Listener) Close() error {
|
|
return ln.listener.Close()
|
|
}
|
|
|
|
func init() {
|
|
common.Must(internet.RegisterTransportListener(protocolName, ListenWS))
|
|
}
|