vendor_libs/test_vendor_lib/packets/hci/acl_packet_builder.cc

/*
 * Copyright 2018 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.
 */

#include "packets/hci/acl_packet_builder.h"

#include "os/log.h"

using std::vector;
using test_vendor_lib::acl::BroadcastFlagsType;
using test_vendor_lib::acl::PacketBoundaryFlagsType;

namespace test_vendor_lib {
namespace packets {

AclPacketBuilder::AclPacketBuilder(uint16_t handle, PacketBoundaryFlagsType packet_boundary_flags,
                                   BroadcastFlagsType broadcast_flags, std::unique_ptr<BasePacketBuilder> payload)
    : handle_(handle), packet_boundary_flags_(packet_boundary_flags), broadcast_flags_(broadcast_flags),
      payload_(std::move(payload)) {}

std::unique_ptr<AclPacketBuilder> AclPacketBuilder::Create(uint16_t handle,
                                                           PacketBoundaryFlagsType packet_boundary_flags,
                                                           BroadcastFlagsType broadcast_flags,
                                                           std::unique_ptr<BasePacketBuilder> payload) {
  return std::unique_ptr<AclPacketBuilder>(
      new AclPacketBuilder(handle, packet_boundary_flags, broadcast_flags, std::move(payload)));
}

size_t AclPacketBuilder::size() const {
  return 2 * sizeof(uint16_t) + payload_->size();
}

void AclPacketBuilder::Serialize(std::back_insert_iterator<std::vector<uint8_t>> it) const {
  insert(static_cast<uint16_t>((handle_ & 0xfff) | (static_cast<uint16_t>(packet_boundary_flags_) << 12) |
                               (static_cast<uint16_t>(broadcast_flags_) << 14)),
         it);
  uint16_t payload_size = payload_->size();

  ASSERT_LOG(static_cast<size_t>(payload_size) == payload_->size(), "Payload too large for an ACL packet: %d",
             static_cast<int>(payload_->size()));
  insert(payload_size, it);
  payload_->Serialize(it);
}

}  // namespace packets
}  // namespace test_vendor_lib