syntax = "proto3";

package envoy.extensions.compression.gzip.decompressor.v3;

import "google/protobuf/wrappers.proto";

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

option java_package = "io.envoyproxy.envoy.extensions.compression.gzip.decompressor.v3";
option java_outer_classname = "GzipProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/extensions/compression/gzip/decompressor/v3;decompressorv3";
option (udpa.annotations.file_status).package_version_status = ACTIVE;

// [#protodoc-title: Gzip Decompressor]
// [#extension: envoy.compression.gzip.decompressor]

message Gzip {
  // Value from 9 to 15 that represents the base two logarithmic of the decompressor's window size.
  // The decompression window size needs to be equal or larger than the compression window size.
  // The default window size is 15.
  // This is so that the decompressor can decompress a response compressed by a compressor with any compression window size.
  // For more details about this parameter, please refer to `zlib manual <https://www.zlib.net/manual.html>`_ > inflateInit2.
  google.protobuf.UInt32Value window_bits = 1 [(validate.rules).uint32 = {lte: 15 gte: 9}];

  // Value for zlib's decompressor output buffer. If not set, defaults to 4096.
  // See https://www.zlib.net/manual.html for more details.
  google.protobuf.UInt32Value chunk_size = 2 [(validate.rules).uint32 = {lte: 65536 gte: 4096}];

  // An upper bound to the number of times the output buffer is allowed to be bigger than the size of
  // the accumulated input. This value is used to prevent decompression bombs. If not set, defaults to 100.
  // [#comment:TODO(rojkov): Re-design the Decompressor interface to handle compression bombs gracefully instead of this quick solution.
  // See https://github.com/envoyproxy/envoy/commit/d4c39e635603e2f23e1e08ddecf5a5fb5a706338 for details.]
  google.protobuf.UInt32Value max_inflate_ratio = 3 [(validate.rules).uint32 = {lte: 1032 gte: 1}];
}