package adapter import ( "context" "net/netip" C "github.com/sagernet/sing-box/constant" M "github.com/sagernet/sing/common/metadata" ) type Inbound interface { Service Type() string Tag() string } type InboundContext struct { Inbound string Network string Source M.Socksaddr Destination M.Socksaddr Domain string Protocol string Outbound string // cache DomainStrategy C.DomainStrategy SniffEnabled bool SniffOverrideDestination bool DestinationAddresses []netip.Addr SourceGeoIPCode string GeoIPCode string } type inboundContextKey struct{} func WithContext(ctx context.Context, inboundContext *InboundContext) context.Context { return context.WithValue(ctx, (*inboundContextKey)(nil), inboundContext) } func ContextFrom(ctx context.Context) *InboundContext { metadata := ctx.Value((*inboundContextKey)(nil)) if metadata == nil { return nil } return metadata.(*InboundContext) } func AppendContext(ctx context.Context) (context.Context, *InboundContext) { metadata := ContextFrom(ctx) if metadata != nil { return ctx, metadata } metadata = new(InboundContext) return WithContext(ctx, metadata), metadata }