mirror of
https://github.com/SagerNet/sing-box.git
synced 2025-06-10 12:24:13 +08:00
127 lines
3.3 KiB
Go
127 lines
3.3 KiB
Go
package v2raygrpc
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import (
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"context"
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"crypto/tls"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"os"
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"strings"
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"github.com/sagernet/sing-box/adapter"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/option"
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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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sHttp "github.com/sagernet/sing/protocol/http"
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"golang.org/x/net/http2"
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)
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var _ adapter.V2RayServerTransport = (*Server)(nil)
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type Server struct {
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ctx context.Context
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canceler context.CancelFunc
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handler N.TCPConnectionHandler
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errorHandler E.Handler
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h2Opts *http2.ServeConnOpts
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h2Server *http2.Server
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path string
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tlsConfig *tls.Config
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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.Config, handler N.TCPConnectionHandler, errorHandler E.Handler) *Server {
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server := &Server{
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handler: handler,
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errorHandler: errorHandler,
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path: fmt.Sprintf("/%s/Tun", url.QueryEscape(options.ServiceName)),
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tlsConfig: tlsConfig,
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h2Server: &http2.Server{},
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}
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server.ctx, server.canceler = context.WithCancel(ctx)
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if !common.Contains(tlsConfig.NextProtos, http2.NextProtoTLS) {
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tlsConfig.NextProtos = append(tlsConfig.NextProtos, http2.NextProtoTLS)
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}
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server.h2Opts = &http2.ServeConnOpts{
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Context: ctx,
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Handler: server,
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BaseConfig: &http.Server{
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ReadHeaderTimeout: C.TCPTimeout,
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MaxHeaderBytes: http.DefaultMaxHeaderBytes,
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Handler: server,
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},
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}
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return server
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}
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func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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if request.URL.Path != s.path {
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writer.WriteHeader(http.StatusNotFound)
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s.badRequest(request, 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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writer.WriteHeader(http.StatusNotFound)
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s.badRequest(request, 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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writer.WriteHeader(http.StatusNotFound)
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s.badRequest(request, 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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//if f, ok := writer.(http.Flusher); ok {
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// f.Flush()
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//}
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var metadata M.Metadata
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metadata.Source = sHttp.SourceAddress(request)
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conn := newGunConn(request.Body, writer, request.Body)
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s.handler.NewConnection(request.Context(), conn, metadata)
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}
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func (s *Server) badRequest(request *http.Request, err error) {
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s.errorHandler.NewError(request.Context(), E.Cause(err, "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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tlsEnabled := s.tlsConfig != nil
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for {
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conn, err := listener.Accept()
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if err != nil {
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return err
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}
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if tlsEnabled {
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tlsConn := tls.Server(conn, s.tlsConfig.Clone())
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err = tlsConn.HandshakeContext(s.ctx)
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if err != nil {
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continue
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}
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conn = tlsConn
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}
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go s.h2Server.ServeConn(conn, s.h2Opts)
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}
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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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s.canceler()
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return nil
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}
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