// [#protodoc-title: Protocol options]

syntax = "proto3";

package envoy.api.v2;

import "google/protobuf/wrappers.proto";

// [#protodoc-title: Protocol options]

// [#not-implemented-hide:]
message TcpProtocolOptions {
}

message Http1ProtocolOptions {
  // Handle HTTP requests with absolute URLs in the requests. These requests
  // are generally sent by clients to forward/explicit proxies. This allows clients to configure
  // envoy as their HTTP proxy. In Unix, for example, this is typically done by setting the
  // *http_proxy* environment variable.
  google.protobuf.BoolValue allow_absolute_url = 1;
}

message Http2ProtocolOptions {
  // `Maximum table size <http://httpwg.org/specs/rfc7541.html#rfc.section.4.2>`_
  // (in octets) that the encoder is permitted to use for the dynamic HPACK table. Valid values
  // range from 0 to 4294967295 (2^32 - 1) and defaults to 4096. 0 effectively disables header
  // compression.
  google.protobuf.UInt32Value hpack_table_size = 1;

  // `Maximum concurrent streams <http://httpwg.org/specs/rfc7540.html#rfc.section.5.1.2>`_
  // allowed for peer on one HTTP/2 connection. Valid values range from 1 to 2147483647 (2^31 - 1)
  // and defaults to 2147483647.
  google.protobuf.UInt32Value max_concurrent_streams = 2;

  // `Initial stream-level flow-control window
  // <http://httpwg.org/specs/rfc7540.html#rfc.section.6.9.2>`_ size. Valid values range from 65535
  // (2^16 - 1, HTTP/2 default) to 2147483647 (2^31 - 1, HTTP/2 maximum) and defaults to 268435456
  // (256 * 1024 * 1024).
  //
  // NOTE: 65535 is the initial window size from HTTP/2 spec. We only support increasing the default
  // window size now, so it's also the minimum.

  // This field also acts as a soft limit on the number of bytes Envoy will buffer per-stream in the
  // HTTP/2 codec buffers.  Once the buffer reaches this pointer, watermark callbacks will fire to
  // stop the flow of data to the codec buffers.
  google.protobuf.UInt32Value initial_stream_window_size = 3;

  // Similar to *initial_stream_window_size*, but for connection-level flow-control
  // window. Currently, this has the same minimum/maximum/default as *initial_stream_window_size*.
  google.protobuf.UInt32Value initial_connection_window_size = 4;
}

// [#not-implemented-hide:]
message GrpcProtocolOptions {
  Http2ProtocolOptions http2_protocol_options = 1;
}