gd/l2cap/classic/dynamic_channel_configuration_option.h

/*
 * Copyright 2019 The Android Open Source Project
 *
 * 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.
 */

#pragma once

#include "l2cap/mtu.h"

namespace bluetooth {
namespace l2cap {
namespace classic {

/**
 * Configuration Option specified by L2CAP Channel user on a dynamic channel. L2CAP module will configure the channel
 * based on user provided option.
 */
struct DynamicChannelConfigurationOption {
  enum class RetransmissionAndFlowControlMode {
    L2CAP_BASIC,
    ENHANCED_RETRANSMISSION,
    ENHANCED_RETRANSMISSION_OPTIONAL,
  };
  /**
   * Retransmission and flow control mode. Currently L2CAP_BASIC and ENHANCED_RETRANSMISSION.
   * If the remote doesn't support a mode, it might fall back to basic, as this is a negotiable option.
   */
  RetransmissionAndFlowControlMode channel_mode = RetransmissionAndFlowControlMode::L2CAP_BASIC;

  /**
   * Maximum SDU size that the L2CAP Channel user is able to process.
   */
  Mtu incoming_mtu = kDefaultClassicMtu;

  /**
   * Minimum MTU that we enforce the remote channel to have
   */
  Mtu minimal_remote_mtu = kMinimumClassicMtu;
};

}  // namespace classic
}  // namespace l2cap
}  // namespace bluetooth