#pragma once

#include "envoy/stream_info/filter_state.h"

#include "absl/strings/string_view.h"

namespace Envoy {

namespace Network {

/**

 * Network namespace filepath from the listener address. This filter state is automatically

 * populated when a connection is accepted if the listener's local address has a network

 * namespace configured. It provides read-only access to the network namespace, which is

 * particularly useful for logging, routing decisions, or other filter logic in multi-tenant

 * or containerized environments.

 */

class DownstreamNetworkNamespace : public StreamInfo::FilterState::Object {

public:

  DownstreamNetworkNamespace(absl::string_view network_namespace_filepath)

  static const std::string& key();

private:

  const std::string network_namespace_filepath_;

};

} // namespace Network

} // namespace Envoy