#pragma once

#include "envoy/config/core/v3/base.pb.h"

#include "envoy/stream_info/filter_state.h"

#include "absl/strings/string_view.h"

namespace Envoy {

namespace Upstream {

/**

 * Data structure holding context for transport socket matching.

 * This provides access to:

 * - Endpoint metadata: metadata associated with the selected upstream endpoint.

 * - Locality metadata: metadata associated with the endpoint's locality.

 * - Filter state: shared filter state from downstream connection (via TransportSocketOptions).

 *

 * Filter state enables downstream-connection-based matching by allowing filters to explicitly

 * pass any data (e.g., network namespace, custom attributes) from downstream to upstream.

 * This follows the same pattern as tunneling in Envoy.

 */

struct TransportSocketMatchingData {

  TransportSocketMatchingData(const envoy::config::core::v3::Metadata* endpoint_metadata,

                              const envoy::config::core::v3::Metadata* locality_metadata,

                              const StreamInfo::FilterState* filter_state = nullptr)

  const envoy::config::core::v3::Metadata* endpoint_metadata_;

  const envoy::config::core::v3::Metadata* locality_metadata_;

  const StreamInfo::FilterState* filter_state_;

};

} // namespace Upstream

} // namespace Envoy