mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-09-19 18:17:50 +00:00
93 lines
2.5 KiB
Go
93 lines
2.5 KiB
Go
package v2raygrpc
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import (
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"context"
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"net"
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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/common"
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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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"golang.org/x/net/http2"
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"google.golang.org/grpc"
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"google.golang.org/grpc/keepalive"
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gM "google.golang.org/grpc/metadata"
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"google.golang.org/grpc/peer"
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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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handler N.TCPConnectionHandler
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server *grpc.Server
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}
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func NewServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler) (*Server, error) {
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var serverOptions []grpc.ServerOption
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if tlsConfig != nil {
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if !common.Contains(tlsConfig.NextProtos(), http2.NextProtoTLS) {
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tlsConfig.SetNextProtos(append([]string{"h2"}, tlsConfig.NextProtos()...))
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}
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serverOptions = append(serverOptions, grpc.Creds(NewTLSTransportCredentials(tlsConfig)))
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}
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if options.IdleTimeout > 0 {
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serverOptions = append(serverOptions, grpc.KeepaliveParams(keepalive.ServerParameters{
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Time: time.Duration(options.IdleTimeout),
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Timeout: time.Duration(options.PingTimeout),
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}))
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}
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server := &Server{ctx, handler, grpc.NewServer(serverOptions...)}
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RegisterGunServiceCustomNameServer(server.server, server, options.ServiceName)
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return server, nil
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}
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func (s *Server) Tun(server GunService_TunServer) error {
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ctx, cancel := common.ContextWithCancelCause(s.ctx)
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conn := NewGRPCConn(server, cancel)
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var metadata M.Metadata
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if remotePeer, loaded := peer.FromContext(server.Context()); loaded {
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metadata.Source = M.SocksaddrFromNet(remotePeer.Addr)
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}
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if grpcMetadata, loaded := gM.FromIncomingContext(server.Context()); loaded {
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forwardFrom := strings.Join(grpcMetadata.Get("X-Forwarded-For"), ",")
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if forwardFrom != "" {
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for _, from := range strings.Split(forwardFrom, ",") {
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originAddr := M.ParseSocksaddr(from)
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if originAddr.IsValid() {
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metadata.Source = originAddr.Unwrap()
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}
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}
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}
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}
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go s.handler.NewConnection(ctx, conn, metadata)
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<-ctx.Done()
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return nil
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}
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func (s *Server) mustEmbedUnimplementedGunServiceServer() {
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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 (s *Server) Serve(listener net.Listener) error {
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return s.server.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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s.server.Stop()
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return nil
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}
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