1 /*
2 * Copyright (C) 2014 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 <input/InputTransport.h>
18 #include <input/Input.h>
19
20 namespace android {
21
22 #define CHECK_OFFSET(type, member, expected_offset) \
23 static_assert((offsetof(type, member) == (expected_offset)), "")
24
25 struct Foo {
26 uint32_t dummy;
27 PointerCoords coords;
28 };
29
TestPointerCoordsAlignment()30 void TestPointerCoordsAlignment() {
31 CHECK_OFFSET(Foo, coords, 8);
32 }
33
TestInputMessageAlignment()34 void TestInputMessageAlignment() {
35 CHECK_OFFSET(InputMessage, body, 8);
36
37 CHECK_OFFSET(InputMessage::Body::Key, seq, 0);
38 CHECK_OFFSET(InputMessage::Body::Key, eventId, 4);
39 CHECK_OFFSET(InputMessage::Body::Key, eventTime, 8);
40 CHECK_OFFSET(InputMessage::Body::Key, deviceId, 16);
41 CHECK_OFFSET(InputMessage::Body::Key, source, 20);
42 CHECK_OFFSET(InputMessage::Body::Key, displayId, 24);
43 CHECK_OFFSET(InputMessage::Body::Key, hmac, 28);
44 CHECK_OFFSET(InputMessage::Body::Key, action, 60);
45 CHECK_OFFSET(InputMessage::Body::Key, flags, 64);
46 CHECK_OFFSET(InputMessage::Body::Key, keyCode, 68);
47 CHECK_OFFSET(InputMessage::Body::Key, scanCode, 72);
48 CHECK_OFFSET(InputMessage::Body::Key, metaState, 76);
49 CHECK_OFFSET(InputMessage::Body::Key, repeatCount, 80);
50 CHECK_OFFSET(InputMessage::Body::Key, downTime, 88);
51
52 CHECK_OFFSET(InputMessage::Body::Motion, seq, 0);
53 CHECK_OFFSET(InputMessage::Body::Motion, eventId, 4);
54 CHECK_OFFSET(InputMessage::Body::Motion, eventTime, 8);
55 CHECK_OFFSET(InputMessage::Body::Motion, deviceId, 16);
56 CHECK_OFFSET(InputMessage::Body::Motion, source, 20);
57 CHECK_OFFSET(InputMessage::Body::Motion, displayId, 24);
58 CHECK_OFFSET(InputMessage::Body::Motion, hmac, 28);
59 CHECK_OFFSET(InputMessage::Body::Motion, action, 60);
60 CHECK_OFFSET(InputMessage::Body::Motion, actionButton, 64);
61 CHECK_OFFSET(InputMessage::Body::Motion, flags, 68);
62 CHECK_OFFSET(InputMessage::Body::Motion, metaState, 72);
63 CHECK_OFFSET(InputMessage::Body::Motion, buttonState, 76);
64 CHECK_OFFSET(InputMessage::Body::Motion, classification, 80);
65 CHECK_OFFSET(InputMessage::Body::Motion, edgeFlags, 84);
66 CHECK_OFFSET(InputMessage::Body::Motion, downTime, 88);
67 CHECK_OFFSET(InputMessage::Body::Motion, xScale, 96);
68 CHECK_OFFSET(InputMessage::Body::Motion, yScale, 100);
69 CHECK_OFFSET(InputMessage::Body::Motion, xOffset, 104);
70 CHECK_OFFSET(InputMessage::Body::Motion, yOffset, 108);
71 CHECK_OFFSET(InputMessage::Body::Motion, xPrecision, 112);
72 CHECK_OFFSET(InputMessage::Body::Motion, yPrecision, 116);
73 CHECK_OFFSET(InputMessage::Body::Motion, xCursorPosition, 120);
74 CHECK_OFFSET(InputMessage::Body::Motion, yCursorPosition, 124);
75 CHECK_OFFSET(InputMessage::Body::Motion, pointerCount, 128);
76 CHECK_OFFSET(InputMessage::Body::Motion, pointers, 136);
77
78 CHECK_OFFSET(InputMessage::Body::Focus, seq, 0);
79 CHECK_OFFSET(InputMessage::Body::Focus, eventId, 4);
80 CHECK_OFFSET(InputMessage::Body::Focus, hasFocus, 12);
81 CHECK_OFFSET(InputMessage::Body::Focus, inTouchMode, 14);
82
83 CHECK_OFFSET(InputMessage::Body::Finished, seq, 0);
84 CHECK_OFFSET(InputMessage::Body::Finished, handled, 4);
85 }
86
TestHeaderSize()87 void TestHeaderSize() {
88 static_assert(sizeof(InputMessage::Header) == 8);
89 }
90
91 /**
92 * We cannot use the Body::size() method here because it is not static for
93 * the Motion type, where "pointerCount" variable affects the size and can change at runtime.
94 */
TestBodySize()95 void TestBodySize() {
96 static_assert(sizeof(InputMessage::Body::Key) == 96);
97 static_assert(sizeof(InputMessage::Body::Motion) ==
98 offsetof(InputMessage::Body::Motion, pointers) +
99 sizeof(InputMessage::Body::Motion::Pointer) * MAX_POINTERS);
100 static_assert(sizeof(InputMessage::Body::Finished) == 8);
101 static_assert(sizeof(InputMessage::Body::Focus) == 16);
102 }
103
104 // --- VerifiedInputEvent ---
105 // Ensure that VerifiedInputEvent, VerifiedKeyEvent, VerifiedMotionEvent are packed.
106 // We will treat them as byte collections when signing them. There should not be any uninitialized
107 // data in-between fields. Otherwise, the padded data will affect the hmac value and verifications
108 // will fail.
109
TestVerifiedEventSize()110 void TestVerifiedEventSize() {
111 // VerifiedInputEvent
112 constexpr size_t VERIFIED_INPUT_EVENT_SIZE = sizeof(VerifiedInputEvent::type) +
113 sizeof(VerifiedInputEvent::deviceId) + sizeof(VerifiedInputEvent::eventTimeNanos) +
114 sizeof(VerifiedInputEvent::source) + sizeof(VerifiedInputEvent::displayId);
115 static_assert(sizeof(VerifiedInputEvent) == VERIFIED_INPUT_EVENT_SIZE);
116
117 // VerifiedKeyEvent
118 constexpr size_t VERIFIED_KEY_EVENT_SIZE = VERIFIED_INPUT_EVENT_SIZE +
119 sizeof(VerifiedKeyEvent::action) + sizeof(VerifiedKeyEvent::downTimeNanos) +
120 sizeof(VerifiedKeyEvent::flags) + sizeof(VerifiedKeyEvent::keyCode) +
121 sizeof(VerifiedKeyEvent::scanCode) + sizeof(VerifiedKeyEvent::metaState) +
122 sizeof(VerifiedKeyEvent::repeatCount);
123 static_assert(sizeof(VerifiedKeyEvent) == VERIFIED_KEY_EVENT_SIZE);
124
125 // VerifiedMotionEvent
126 constexpr size_t VERIFIED_MOTION_EVENT_SIZE = VERIFIED_INPUT_EVENT_SIZE +
127 sizeof(VerifiedMotionEvent::rawX) + sizeof(VerifiedMotionEvent::rawY) +
128 sizeof(VerifiedMotionEvent::actionMasked) + sizeof(VerifiedMotionEvent::downTimeNanos) +
129 sizeof(VerifiedMotionEvent::flags) + sizeof(VerifiedMotionEvent::metaState) +
130 sizeof(VerifiedMotionEvent::buttonState);
131 static_assert(sizeof(VerifiedMotionEvent) == VERIFIED_MOTION_EVENT_SIZE);
132 }
133
134 } // namespace android
135