package command
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//go:generate go run github.com/v2fly/v2ray-core/v5/common/errors/errorgen
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import (
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"context"
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"time"
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"google.golang.org/grpc"
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core "github.com/v2fly/v2ray-core/v5"
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"github.com/v2fly/v2ray-core/v5/common"
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"github.com/v2fly/v2ray-core/v5/features/routing"
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"github.com/v2fly/v2ray-core/v5/features/stats"
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)
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// routingServer is an implementation of RoutingService.
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type routingServer struct {
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router routing.Router
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routingStats stats.Channel
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}
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func (s *routingServer) GetBalancerInfo(ctx context.Context, request *GetBalancerInfoRequest) (*GetBalancerInfoResponse, error) {
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var ret GetBalancerInfoResponse
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ret.Balancer = &BalancerMsg{}
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if bo, ok := s.router.(routing.BalancerOverrider); ok {
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{
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res, err := bo.GetOverrideTarget(request.GetTag())
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if err != nil {
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return nil, err
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}
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ret.Balancer.Override = &OverrideInfo{
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Target: res,
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}
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}
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}
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if pt, ok := s.router.(routing.BalancerPrincipleTarget); ok {
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{
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res, err := pt.GetPrincipleTarget(request.GetTag())
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if err != nil {
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newError("unable to obtain principle target").Base(err).AtInfo().WriteToLog()
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} else {
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ret.Balancer.PrincipleTarget = &PrincipleTargetInfo{Tag: res}
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}
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}
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}
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return &ret, nil
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}
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func (s *routingServer) OverrideBalancerTarget(ctx context.Context, request *OverrideBalancerTargetRequest) (*OverrideBalancerTargetResponse, error) {
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if bo, ok := s.router.(routing.BalancerOverrider); ok {
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return &OverrideBalancerTargetResponse{}, bo.SetOverrideTarget(request.BalancerTag, request.Target)
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}
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return nil, newError("unsupported router implementation")
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}
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// NewRoutingServer creates a statistics service with statistics manager.
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func NewRoutingServer(router routing.Router, routingStats stats.Channel) RoutingServiceServer {
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return &routingServer{
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router: router,
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routingStats: routingStats,
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}
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}
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func (s *routingServer) TestRoute(ctx context.Context, request *TestRouteRequest) (*RoutingContext, error) {
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if request.RoutingContext == nil {
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return nil, newError("Invalid routing request.")
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}
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route, err := s.router.PickRoute(AsRoutingContext(request.RoutingContext))
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if err != nil {
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return nil, err
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}
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if request.PublishResult && s.routingStats != nil {
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ctx, _ := context.WithTimeout(context.Background(), 4*time.Second) // nolint: govet
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s.routingStats.Publish(ctx, route)
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}
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return AsProtobufMessage(request.FieldSelectors)(route), nil
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}
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func (s *routingServer) SubscribeRoutingStats(request *SubscribeRoutingStatsRequest, stream RoutingService_SubscribeRoutingStatsServer) error {
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if s.routingStats == nil {
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return newError("Routing statistics not enabled.")
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}
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genMessage := AsProtobufMessage(request.FieldSelectors)
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subscriber, err := stats.SubscribeRunnableChannel(s.routingStats)
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if err != nil {
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return err
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}
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defer stats.UnsubscribeClosableChannel(s.routingStats, subscriber)
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for {
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select {
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case value, ok := <-subscriber:
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if !ok {
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return newError("Upstream closed the subscriber channel.")
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}
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route, ok := value.(routing.Route)
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if !ok {
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return newError("Upstream sent malformed statistics.")
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}
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err := stream.Send(genMessage(route))
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if err != nil {
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return err
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}
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case <-stream.Context().Done():
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return stream.Context().Err()
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}
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}
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}
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func (s *routingServer) mustEmbedUnimplementedRoutingServiceServer() {}
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type service struct {
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v *core.Instance
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}
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func (s *service) Register(server *grpc.Server) {
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common.Must(s.v.RequireFeatures(func(router routing.Router, stats stats.Manager) {
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RegisterRoutingServiceServer(server, NewRoutingServer(router, nil))
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}))
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}
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func init() {
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common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, cfg interface{}) (interface{}, error) {
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s := core.MustFromContext(ctx)
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return &service{v: s}, nil
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}))
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}
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