// Copyright 2025 Envoy Project Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package envoy.extensions.filters.listener.local_ratelimit.v3;

import "envoy/config/core/v3/base.proto";
import "envoy/type/v3/token_bucket.proto";

import "udpa/annotations/status.proto";
import "validate/validate.proto";

option java_package = "io.envoyproxy.envoy.extensions.filters.listener.local_ratelimit.v3";
option java_outer_classname = "LocalRatelimitProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/listener/local_ratelimit/v3;local_ratelimitv3";
option (udpa.annotations.file_status).package_version_status = ACTIVE;

// [#protodoc-title: Local Rate Limit Filter]
// Local rate limit :ref:`configuration overview <config_listener_filters_local_rate_limit>`.
// [#extension: envoy.filters.listener.local_ratelimit]

message LocalRateLimit {
  // The prefix to use when emitting :ref:`statistics
  // <config_listener_filters_local_rate_limit_stats>`.
  string stat_prefix = 1 [(validate.rules).string = {min_len: 1}];

  // The token bucket configuration to use for rate limiting all incoming sockets. If the token is available,
  // the socket will be allowed. If no tokens are available, the socket will be immediately closed.
  //
  // .. note::
  //   In the current implementation the token bucket's :ref:`fill_interval
  //   <envoy_v3_api_field_type.v3.TokenBucket.fill_interval>` must be >= 50ms to avoid too aggressive
  //   refills.
  type.v3.TokenBucket token_bucket = 2 [(validate.rules).message = {required: true}];

  // Runtime flag that controls whether the filter is enabled or not. If not specified, defaults
  // to enabled.
  config.core.v3.RuntimeFeatureFlag runtime_enabled = 3;
}
