mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-16 07:42:22 +08:00
116 lines
3.6 KiB
Go
116 lines
3.6 KiB
Go
package v2raygrpclite
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import (
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"context"
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"net"
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"net/http"
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"os"
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"strings"
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"time"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/tls"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing-box/transport/v2rayhttp"
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"github.com/sagernet/sing/common"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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aTLS "github.com/sagernet/sing/common/tls"
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sHttp "github.com/sagernet/sing/protocol/http"
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"golang.org/x/net/http2"
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"golang.org/x/net/http2/h2c"
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)
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var _ adapter.V2RayServerTransport = (*Server)(nil)
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type Server struct {
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tlsConfig tls.ServerConfig
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handler adapter.V2RayServerTransportHandler
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errorHandler E.Handler
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httpServer *http.Server
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h2Server *http2.Server
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h2cHandler http.Handler
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path string
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}
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func (s *Server) Network() []string {
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return []string{N.NetworkTCP}
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}
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func NewServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (*Server, error) {
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server := &Server{
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tlsConfig: tlsConfig,
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handler: handler,
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path: "/" + options.ServiceName + "/Tun",
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h2Server: &http2.Server{
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IdleTimeout: time.Duration(options.IdleTimeout),
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},
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}
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server.httpServer = &http.Server{
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Handler: server,
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}
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server.h2cHandler = h2c.NewHandler(server, server.h2Server)
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return server, nil
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}
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func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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if request.Method == "PRI" && len(request.Header) == 0 && request.URL.Path == "*" && request.Proto == "HTTP/2.0" {
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s.h2cHandler.ServeHTTP(writer, request)
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return
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}
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if request.URL.Path != s.path {
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s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad path: ", request.URL.Path))
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return
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}
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if request.Method != http.MethodPost {
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s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad method: ", request.Method))
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return
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}
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if ct := request.Header.Get("Content-Type"); !strings.HasPrefix(ct, "application/grpc") {
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s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad content type: ", ct))
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return
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}
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writer.Header().Set("Content-Type", "application/grpc")
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writer.Header().Set("TE", "trailers")
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writer.WriteHeader(http.StatusOK)
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var metadata M.Metadata
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metadata.Source = sHttp.SourceAddress(request)
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conn := v2rayhttp.NewHTTP2Wrapper(newGunConn(request.Body, writer, writer.(http.Flusher)))
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s.handler.NewConnection(request.Context(), conn, metadata)
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conn.CloseWrapper()
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}
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func (s *Server) fallbackRequest(ctx context.Context, writer http.ResponseWriter, request *http.Request, statusCode int, err error) {
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conn := v2rayhttp.NewHTTPConn(request.Body, writer)
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fErr := s.handler.FallbackConnection(ctx, &conn, M.Metadata{})
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if fErr == nil {
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return
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} else if fErr == os.ErrInvalid {
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fErr = nil
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}
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if statusCode > 0 {
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writer.WriteHeader(statusCode)
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}
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s.handler.NewError(request.Context(), E.Cause(E.Errors(err, E.Cause(fErr, "fallback connection")), "process connection from ", request.RemoteAddr))
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}
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func (s *Server) Serve(listener net.Listener) error {
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if s.tlsConfig != nil {
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if !common.Contains(s.tlsConfig.NextProtos(), http2.NextProtoTLS) {
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s.tlsConfig.SetNextProtos(append([]string{"h2"}, s.tlsConfig.NextProtos()...))
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}
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listener = aTLS.NewListener(listener, s.tlsConfig)
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}
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return s.httpServer.Serve(listener)
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}
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func (s *Server) ServePacket(listener net.PacketConn) error {
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return os.ErrInvalid
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}
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func (s *Server) Close() error {
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return common.Close(common.PtrOrNil(s.httpServer))
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}
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