1 /*
2 * Copyright 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "change_path.h"
18
19 #include <base/sys_byteorder.h>
20
21 #include "internal_include/bt_trace.h"
22
23 namespace bluetooth {
24 namespace avrcp {
25
MakeBuilder(Status status,uint32_t num_items_in_folder)26 std::unique_ptr<ChangePathResponseBuilder> ChangePathResponseBuilder::MakeBuilder(
27 Status status, uint32_t num_items_in_folder) {
28 std::unique_ptr<ChangePathResponseBuilder> builder(
29 new ChangePathResponseBuilder(status, num_items_in_folder));
30
31 return builder;
32 }
33
size() const34 size_t ChangePathResponseBuilder::size() const {
35 size_t len = BrowsePacket::kMinSize();
36 len += 1; // Status
37 if (status_ != Status::NO_ERROR) {
38 return len;
39 }
40
41 len += 4; // Number of items in folder
42 return len;
43 }
44
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)45 bool ChangePathResponseBuilder::Serialize(const std::shared_ptr<::bluetooth::Packet>& pkt) {
46 ReserveSpace(pkt, size());
47
48 BrowsePacketBuilder::PushHeader(pkt, size() - BrowsePacket::kMinSize());
49
50 AddPayloadOctets1(pkt, (uint8_t)status_);
51 if (status_ != Status::NO_ERROR) {
52 return true;
53 }
54
55 AddPayloadOctets4(pkt, base::ByteSwap(num_items_in_folder_));
56 return true;
57 }
58
GetUidCounter() const59 uint16_t ChangePathRequest::GetUidCounter() const {
60 auto it = begin() + BrowsePacket::kMinSize();
61 return it.extractBE<uint16_t>();
62 }
63
GetDirection() const64 Direction ChangePathRequest::GetDirection() const {
65 auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(2);
66 return static_cast<Direction>(*it);
67 }
68
GetUid() const69 uint64_t ChangePathRequest::GetUid() const {
70 auto it = begin() + BrowsePacket::kMinSize() + static_cast<size_t>(3);
71 return it.extractBE<uint64_t>();
72 }
73
IsValid() const74 bool ChangePathRequest::IsValid() const {
75 if (!BrowsePacket::IsValid()) {
76 return false;
77 }
78 // Change path request packets are always the same size
79 return size() == kMinSize();
80 }
81
ToString() const82 std::string ChangePathRequest::ToString() const {
83 std::stringstream ss;
84 ss << "ChangePathRequestPacket: " << std::endl;
85 ss << " └ PDU = " << GetPdu() << std::endl;
86 ss << " └ Length = " << GetLength() << std::endl;
87 ss << " └ UID Counter = " << loghex(GetUidCounter()) << std::endl;
88 ss << " └ Direction = " << GetDirection() << std::endl;
89 ss << " └ UID Requested = " << loghex(GetUid()) << std::endl;
90 ss << std::endl;
91
92 return ss.str();
93 }
94
MakeBuilder(uint16_t uid_counter,Direction direction,uint64_t folder_uid)95 std::unique_ptr<ChangePathRequestBuilder> ChangePathRequestBuilder::MakeBuilder(
96 uint16_t uid_counter, Direction direction, uint64_t folder_uid) {
97 std::unique_ptr<ChangePathRequestBuilder> builder(
98 new ChangePathRequestBuilder(uid_counter, direction, folder_uid));
99
100 return builder;
101 }
102
size() const103 size_t ChangePathRequestBuilder::size() const { return ChangePathRequest::kMinSize(); }
104
Serialize(const std::shared_ptr<::bluetooth::Packet> & pkt)105 bool ChangePathRequestBuilder::Serialize(const std::shared_ptr<::bluetooth::Packet>& pkt) {
106 ReserveSpace(pkt, size());
107
108 BrowsePacketBuilder::PushHeader(pkt, size() - BrowsePacket::kMinSize());
109
110 AddPayloadOctets2(pkt, base::ByteSwap(uid_counter_));
111 AddPayloadOctets1(pkt, static_cast<uint8_t>(direction_));
112 AddPayloadOctets8(pkt, base::ByteSwap(folder_uid_));
113 return true;
114 }
115
116 } // namespace avrcp
117 } // namespace bluetooth
118