1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*
* Copyright 2021 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 "model/hci/h4_parser.h"
#include <gtest/gtest.h>
#include <array>
namespace rootcanal {
using PacketData = std::vector<uint8_t>;
class H4ParserTest : public ::testing::Test {
public:
protected:
void SetUp() override {
packet_.clear();
parser_.Reset();
}
void TearDown() override { parser_.Reset(); }
void PacketReadCallback(const std::vector<uint8_t>& packet) {
packet_ = std::move(packet);
}
protected:
H4Parser parser_{
[&](auto p) {
type_ = PacketType::COMMAND;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::EVENT;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::ACL;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::SCO;
PacketReadCallback(p);
},
[&](auto p) {
type_ = PacketType::ISO;
PacketReadCallback(p);
},
true,
};
PacketData packet_;
PacketType type_;
};
TEST_F(H4ParserTest, InitiallyExpectOneByte) {
ASSERT_EQ(1, (int)parser_.BytesRequested());
}
TEST_F(H4ParserTest, SwitchStateAfterType) {
uint8_t typ = (uint8_t)PacketType::ACL;
ASSERT_TRUE(parser_.Consume(&typ, 1));
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_PREAMBLE);
}
TEST_F(H4ParserTest, RequestedBytesDecreases) {
// Make sure that the requested bytes is monotonically decreasing
// for the requested types.
uint8_t typ = (uint8_t)PacketType::ACL;
ASSERT_TRUE(parser_.Consume(&typ, 1));
auto wanted = parser_.BytesRequested();
while (wanted > 0) {
ASSERT_EQ(wanted, parser_.BytesRequested());
ASSERT_TRUE(parser_.Consume(&typ, 1));
wanted--;
}
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_PAYLOAD);
wanted = parser_.BytesRequested();
while (wanted > 0) {
ASSERT_EQ(wanted, parser_.BytesRequested());
ASSERT_TRUE(parser_.Consume(&typ, 1));
wanted--;
}
// A callback should have been invoked.
ASSERT_LT(0, (int)packet_.size());
}
TEST_F(H4ParserTest, RejectNoData) {
// You need to give us something!
PacketData bad_bit;
ASSERT_FALSE(parser_.Consume(bad_bit.data(), bad_bit.size()));
}
TEST_F(H4ParserTest, TooMuchIsDeath) {
PacketData bad_bit({0xfd});
ASSERT_DEATH(parser_.Consume(bad_bit.data(), parser_.BytesRequested() + 1),
"More bytes read .* than expected .*!");
}
TEST_F(H4ParserTest, WrongTypeIsDeath) {
parser_.DisableRecovery();
PacketData bad_bit({0xfd});
ASSERT_DEATH(parser_.Consume(bad_bit.data(), bad_bit.size()),
"Received invalid packet type.*");
}
TEST_F(H4ParserTest, CallsTheRightCallbacks) {
// Make sure that the proper type of callback is invoked.
std::vector<PacketType> types({PacketType::ACL, PacketType::SCO,
PacketType::COMMAND, PacketType::EVENT,
PacketType::ISO});
for (auto packetType : types) {
// Configure the incoming packet.
uint8_t typ = (uint8_t)packetType;
ASSERT_TRUE(parser_.Consume(&typ, 1));
// Feed data as long as this packet is not complete.
while (parser_.CurrentState() != H4Parser::State::HCI_TYPE) {
PacketData data;
for (uint32_t i = 0; i < parser_.BytesRequested(); i++) {
data.push_back((uint8_t)i);
}
ASSERT_TRUE(parser_.Consume(data.data(), data.size()));
}
// The proper callbacks should have been invoked.
ASSERT_LT(0, (int)packet_.size());
ASSERT_EQ(packetType, type_);
}
}
TEST_F(H4ParserTest, Recovery) {
// Validate that the recovery state is exited only after receiving the
// HCI Reset command.
parser_.EnableRecovery();
// Enter recovery state after receiving an invalid packet type.
uint8_t invalid_packet_type = 0xfd;
ASSERT_TRUE(parser_.Consume(&invalid_packet_type, 1));
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_RECOVERY);
const std::array<uint8_t, 4> reset_command{0x01, 0x03, 0x0c, 0x00};
// Send prefixes of the HCI Reset command, restarting over from the start.
for (size_t n = 1; n < 4; n++) {
for (size_t i = 0; i < n; i++) {
ASSERT_TRUE(parser_.Consume(&reset_command[i], 1));
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_RECOVERY);
}
}
// Finally send the full HCI Reset command.
for (size_t i = 0; i < 4; i++) {
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_RECOVERY);
ASSERT_TRUE(parser_.Consume(&reset_command[i], 1));
}
// Validate that the HCI recovery state is exited,
// and the HCI Reset command correctly received on the command callback.
ASSERT_EQ(parser_.CurrentState(), H4Parser::State::HCI_TYPE);
ASSERT_LT(0, (int)packet_.size());
// Validate that the HCI Reset command was correctly received.
ASSERT_EQ(type_, PacketType::COMMAND);
ASSERT_EQ(packet_.size(), reset_command.size() - 1);
for (size_t i = 1; i < packet_.size(); i++) {
ASSERT_EQ(packet_[i - 1], reset_command[i]);
}
}
} // namespace rootcanal
|
