Method send_connection_preface

src/proxy/http2/Http2ConnectionState.cc:1355–1386

Send connection preface The client connection preface is HTTP2_CONNECTION_PREFACE. The server connection preface consists of a potentially empty SETTINGS frame. Details in [RFC 7540] 3.5. HTTP/2 Connection Preface TODO: send client connection preface if the connection is outbound */

   TODO: send client connection preface if the connection is outbound
 */
void
Http2ConnectionState::send_connection_preface()
{
  REMEMBER(NO_EVENT, this->recursion)

  Http2ConnectionSettings configured_settings;
  configured_settings.settings_from_configs(session->is_outbound());

  // We do not have PUSH_PROMISE implemented, so we communicate to the peer
  // that they should not send such frames to us. RFC 9113 6.5.2 says that
  // servers can send this too, but they  must always set a value of 0. Thus we
  // send a value of 0 for both inbound and outbound connections.
  configured_settings.set(HTTP2_SETTINGS_ENABLE_PUSH, 0);

  configured_settings.set(HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, _adjust_concurrent_stream());

  uint32_t const configured_initial_window_size = this->_get_configured_receive_session_window_size();
  if (configured_initial_window_size > HTTP2_INITIAL_WINDOW_SIZE) {
    configured_settings.set(HTTP2_SETTINGS_INITIAL_WINDOW_SIZE, configured_initial_window_size);
  }

  send_settings_frame(configured_settings);

  // If the session window size is non-default, send a WINDOW_UPDATE right
  // away. Note that there is no session window size setting in HTTP/2. The
  // session window size is controlled entirely by WINDOW_UPDATE frames.
  if (configured_initial_window_size > HTTP2_INITIAL_WINDOW_SIZE) {
    auto const diff = configured_initial_window_size - HTTP2_INITIAL_WINDOW_SIZE;
    Http2ConDebug(session, "Updating the session window with a WINDOW_UPDATE frame: %u", diff);
    send_window_update_frame(HTTP2_CONNECTION_CONTROL_STREAM, diff);
  }
}

void
Http2ConnectionState::destroy()