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151 lines
4.7 KiB
151 lines
4.7 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 "get_item_attributes.h"
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namespace bluetooth {
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namespace avrcp {
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std::unique_ptr<GetItemAttributesResponseBuilder>
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GetItemAttributesResponseBuilder::MakeBuilder(Status status, size_t mtu) {
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std::unique_ptr<GetItemAttributesResponseBuilder> builder(
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new GetItemAttributesResponseBuilder(status, mtu));
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return builder;
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}
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bool GetItemAttributesResponseBuilder::AddAttributeEntry(AttributeEntry entry) {
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CHECK(entries_.size() < 0xFF);
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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 GetItemAttributesResponseBuilder::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 GetItemAttributesResponseBuilder::size() const {
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size_t len = BrowsePacket::kMinSize();
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len += 1; // Status
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if (status_ != Status::NO_ERROR) return len;
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len += 1; // Number of attributes
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for (const auto& entry : entries_) {
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len += entry.size();
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}
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return len;
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}
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bool GetItemAttributesResponseBuilder::Serialize(
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const std::shared_ptr<::bluetooth::Packet>& pkt) {
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ReserveSpace(pkt, size());
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BrowsePacketBuilder::PushHeader(pkt, size() - BrowsePacket::kMinSize());
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AddPayloadOctets1(pkt, (uint8_t)status_);
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if (status_ != Status::NO_ERROR) return true;
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AddPayloadOctets1(pkt, entries_.size());
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for (const auto& entry : entries_) {
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AddPayloadOctets4(pkt, base::ByteSwap((uint32_t)entry.attribute()));
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uint16_t character_set = 0x006a; // UTF-8
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AddPayloadOctets2(pkt, base::ByteSwap(character_set));
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uint16_t value_length = entry.value().length();
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AddPayloadOctets2(pkt, base::ByteSwap(value_length));
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for (const uint8_t& byte : entry.value()) {
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AddPayloadOctets1(pkt, byte);
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}
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}
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return true;
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}
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Scope GetItemAttributesRequest::GetScope() const {
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auto it = begin() + BrowsePacket::kMinSize();
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return static_cast<Scope>(*it);
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}
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uint64_t GetItemAttributesRequest::GetUid() const {
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auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(1);
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return it.extractBE<uint64_t>();
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}
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uint16_t GetItemAttributesRequest::GetUidCounter() const {
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auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(9);
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return it.extractBE<uint16_t>();
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}
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uint8_t GetItemAttributesRequest::GetNumAttributes() const {
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auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(11);
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return *it;
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}
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std::vector<Attribute> GetItemAttributesRequest::GetAttributesRequested()
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const {
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auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(11);
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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 GetItemAttributesRequest::IsValid() const {
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if (!BrowsePacket::IsValid()) return false;
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if (size() < kMinSize()) return false;
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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 (GetNumAttributes() * sizeof(Attribute)) == (size() - kMinSize());
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}
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std::string GetItemAttributesRequest::ToString() const {
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std::stringstream ss;
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ss << "GetItemAttributesRequestPacket: " << std::endl;
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ss << " └ PDU = " << GetPdu() << std::endl;
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ss << " └ Length = " << GetLength() << std::endl;
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ss << " └ Scope = " << GetScope() << std::endl;
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ss << " └ UID Requested = " << loghex(GetUid()) << std::endl;
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ss << " └ UID Counter = " << loghex(GetUidCounter()) << std::endl;
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ss << " └ Num Attributes = " << loghex(GetNumAttributes()) << 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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} // namespace avrcp
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} // namespace bluetooth
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