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144 lines
4.4 KiB
144 lines
4.4 KiB
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <algorithm>
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#include "get_element_attributes_packet.h"
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namespace bluetooth {
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namespace avrcp {
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uint64_t GetElementAttributesRequest::GetIdentifier() const {
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auto it = begin() + VendorPacket::kMinSize();
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return it.extract<uint64_t>();
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}
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uint8_t GetElementAttributesRequest::GetNumAttributes() const {
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auto it = begin() + VendorPacket::kMinSize() + static_cast<size_t>(8);
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return it.extract<uint8_t>();
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}
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std::vector<Attribute> GetElementAttributesRequest::GetAttributesRequested()
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const {
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auto it = begin() + VendorPacket::kMinSize() + static_cast<size_t>(8);
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size_t number_of_attributes = it.extract<uint8_t>();
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std::vector<Attribute> attribute_list;
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for (size_t i = 0; i < number_of_attributes; i++) {
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attribute_list.push_back((Attribute)it.extractBE<uint32_t>());
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}
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return attribute_list;
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}
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bool GetElementAttributesRequest::IsValid() const {
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if (!VendorPacket::IsValid()) return false;
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if (size() < kMinSize()) return false;
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size_t num_attributes = GetNumAttributes();
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auto attr_start = begin() + VendorPacket::kMinSize() + static_cast<size_t>(9);
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// Casting the int returned from end - attr_start should be fine. If an
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// overflow occurs we can definitly say the packet is invalid
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return (num_attributes * sizeof(Attribute)) == (size_t)(end() - attr_start);
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}
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std::string GetElementAttributesRequest::ToString() const {
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std::stringstream ss;
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ss << "RegisterNotificationPacket: " << std::endl;
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ss << " └ cType = " << GetCType() << std::endl;
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ss << " └ Subunit Type = " << loghex(GetSubunitType()) << std::endl;
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ss << " └ Subunit ID = " << loghex(GetSubunitId()) << std::endl;
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ss << " └ OpCode = " << GetOpcode() << std::endl;
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ss << " └ Company ID = " << loghex(GetCompanyId()) << std::endl;
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ss << " └ Command PDU = " << GetCommandPdu() << std::endl;
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ss << " └ PacketType = " << GetPacketType() << std::endl;
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ss << " └ Parameter Length = " << GetParameterLength() << std::endl;
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ss << " └ Identifier = " << loghex(GetIdentifier()) << std::endl;
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auto attr_list = GetAttributesRequested();
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ss << " └ Attribute List: Size: " << attr_list.size() << std::endl;
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for (auto it = attr_list.begin(); it != attr_list.end(); it++) {
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ss << " └ " << loghex((uint32_t)(*it)) << std::endl;
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}
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ss << std::endl;
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return ss.str();
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}
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std::unique_ptr<GetElementAttributesResponseBuilder>
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GetElementAttributesResponseBuilder::MakeBuilder(size_t mtu) {
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std::unique_ptr<GetElementAttributesResponseBuilder> builder(
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new GetElementAttributesResponseBuilder(mtu));
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return builder;
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}
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bool GetElementAttributesResponseBuilder::AddAttributeEntry(
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AttributeEntry entry) {
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CHECK_LT(entries_.size(), size_t(0xFF))
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<< __func__ << ": attribute entry overflow";
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size_t remaining_space = mtu_ - size();
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if (entry.size() > remaining_space) {
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entry.resize(remaining_space);
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}
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if (entry.empty()) {
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return false;
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}
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entries_.insert(entry);
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return true;
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}
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bool GetElementAttributesResponseBuilder::AddAttributeEntry(Attribute attribute,
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std::string value) {
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return AddAttributeEntry(AttributeEntry(attribute, value));
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}
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size_t GetElementAttributesResponseBuilder::size() const {
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size_t attr_list_size = 0;
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for (auto& attribute_entry : entries_) {
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attr_list_size += attribute_entry.size();
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}
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return VendorPacket::kMinSize() + 1 + attr_list_size;
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}
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bool GetElementAttributesResponseBuilder::Serialize(
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const std::shared_ptr<::bluetooth::Packet>& pkt) {
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ReserveSpace(pkt, size());
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PacketBuilder::PushHeader(pkt);
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VendorPacketBuilder::PushHeader(pkt, size() - VendorPacket::kMinSize());
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AddPayloadOctets1(pkt, entries_.size());
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for (const auto& attribute_entry : entries_) {
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PushAttributeValue(pkt, attribute_entry);
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}
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return true;
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}
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} // namespace avrcp
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} // namespace bluetooth
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