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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*
* Copyright 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "pc/sctp_utils.h"
#include <stdint.h>
#include <limits>
#include "absl/types/optional.h"
#include "api/priority.h"
#include "media/sctp/sctp_transport_internal.h"
#include "rtc_base/byte_buffer.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "test/gtest.h"
using webrtc::StreamId;
class SctpUtilsTest : public ::testing::Test {
public:
void VerifyOpenMessageFormat(const rtc::CopyOnWriteBuffer& packet,
const std::string& label,
const webrtc::DataChannelInit& config) {
uint8_t message_type;
uint8_t channel_type;
uint32_t reliability;
uint16_t priority;
uint16_t label_length;
uint16_t protocol_length;
rtc::ByteBufferReader buffer(packet.data<char>(), packet.size());
ASSERT_TRUE(buffer.ReadUInt8(&message_type));
EXPECT_EQ(0x03, message_type);
ASSERT_TRUE(buffer.ReadUInt8(&channel_type));
if (config.ordered) {
EXPECT_EQ(
config.maxRetransmits ? 0x01 : (config.maxRetransmitTime ? 0x02 : 0),
channel_type);
} else {
EXPECT_EQ(config.maxRetransmits
? 0x81
: (config.maxRetransmitTime ? 0x82 : 0x80),
channel_type);
}
ASSERT_TRUE(buffer.ReadUInt16(&priority));
if (config.priority) {
// Exact values are checked by round-trip conversion, but
// all values defined are greater than zero.
EXPECT_GT(priority, 0);
} else {
EXPECT_EQ(priority, 0);
}
ASSERT_TRUE(buffer.ReadUInt32(&reliability));
if (config.maxRetransmits || config.maxRetransmitTime) {
EXPECT_EQ(config.maxRetransmits ? *config.maxRetransmits
: *config.maxRetransmitTime,
static_cast<int>(reliability));
}
ASSERT_TRUE(buffer.ReadUInt16(&label_length));
ASSERT_TRUE(buffer.ReadUInt16(&protocol_length));
EXPECT_EQ(label.size(), label_length);
EXPECT_EQ(config.protocol.size(), protocol_length);
std::string label_output;
ASSERT_TRUE(buffer.ReadString(&label_output, label_length));
EXPECT_EQ(label, label_output);
std::string protocol_output;
ASSERT_TRUE(buffer.ReadString(&protocol_output, protocol_length));
EXPECT_EQ(config.protocol, protocol_output);
}
};
TEST_F(SctpUtilsTest, WriteParseOpenMessageWithOrderedReliable) {
webrtc::DataChannelInit config;
std::string label = "abc";
config.protocol = "y";
rtc::CopyOnWriteBuffer packet;
ASSERT_TRUE(webrtc::WriteDataChannelOpenMessage(label, config, &packet));
VerifyOpenMessageFormat(packet, label, config);
std::string output_label;
webrtc::DataChannelInit output_config;
ASSERT_TRUE(webrtc::ParseDataChannelOpenMessage(packet, &output_label,
&output_config));
EXPECT_EQ(label, output_label);
EXPECT_EQ(config.protocol, output_config.protocol);
EXPECT_EQ(config.ordered, output_config.ordered);
EXPECT_EQ(config.maxRetransmitTime, output_config.maxRetransmitTime);
EXPECT_EQ(config.maxRetransmits, output_config.maxRetransmits);
}
TEST_F(SctpUtilsTest, WriteParseOpenMessageWithMaxRetransmitTime) {
webrtc::DataChannelInit config;
std::string label = "abc";
config.ordered = false;
config.maxRetransmitTime = 10;
config.protocol = "y";
rtc::CopyOnWriteBuffer packet;
ASSERT_TRUE(webrtc::WriteDataChannelOpenMessage(label, config, &packet));
VerifyOpenMessageFormat(packet, label, config);
std::string output_label;
webrtc::DataChannelInit output_config;
ASSERT_TRUE(webrtc::ParseDataChannelOpenMessage(packet, &output_label,
&output_config));
EXPECT_EQ(label, output_label);
EXPECT_EQ(config.protocol, output_config.protocol);
EXPECT_EQ(config.ordered, output_config.ordered);
EXPECT_EQ(*config.maxRetransmitTime, *output_config.maxRetransmitTime);
EXPECT_FALSE(output_config.maxRetransmits);
}
TEST_F(SctpUtilsTest, WriteParseOpenMessageWithMaxRetransmits) {
webrtc::DataChannelInit config;
std::string label = "abc";
config.maxRetransmits = 10;
config.protocol = "y";
rtc::CopyOnWriteBuffer packet;
ASSERT_TRUE(webrtc::WriteDataChannelOpenMessage(label, config, &packet));
VerifyOpenMessageFormat(packet, label, config);
std::string output_label;
webrtc::DataChannelInit output_config;
ASSERT_TRUE(webrtc::ParseDataChannelOpenMessage(packet, &output_label,
&output_config));
EXPECT_EQ(label, output_label);
EXPECT_EQ(config.protocol, output_config.protocol);
EXPECT_EQ(config.ordered, output_config.ordered);
EXPECT_EQ(config.maxRetransmits, output_config.maxRetransmits);
EXPECT_FALSE(output_config.maxRetransmitTime);
}
TEST_F(SctpUtilsTest, WriteParseOpenMessageWithPriority) {
webrtc::DataChannelInit config;
std::string label = "abc";
config.protocol = "y";
config.priority = webrtc::Priority::kVeryLow;
rtc::CopyOnWriteBuffer packet;
ASSERT_TRUE(webrtc::WriteDataChannelOpenMessage(label, config, &packet));
VerifyOpenMessageFormat(packet, label, config);
std::string output_label;
webrtc::DataChannelInit output_config;
ASSERT_TRUE(webrtc::ParseDataChannelOpenMessage(packet, &output_label,
&output_config));
EXPECT_EQ(label, output_label);
ASSERT_TRUE(output_config.priority);
EXPECT_EQ(*config.priority, *output_config.priority);
}
TEST_F(SctpUtilsTest, WriteParseAckMessage) {
rtc::CopyOnWriteBuffer packet;
webrtc::WriteDataChannelOpenAckMessage(&packet);
uint8_t message_type;
rtc::ByteBufferReader buffer(packet.data<char>(), packet.size());
ASSERT_TRUE(buffer.ReadUInt8(&message_type));
EXPECT_EQ(0x02, message_type);
EXPECT_TRUE(webrtc::ParseDataChannelOpenAckMessage(packet));
}
TEST_F(SctpUtilsTest, TestIsOpenMessage) {
rtc::CopyOnWriteBuffer open(1);
open.MutableData()[0] = 0x03;
EXPECT_TRUE(webrtc::IsOpenMessage(open));
rtc::CopyOnWriteBuffer openAck(1);
openAck.MutableData()[0] = 0x02;
EXPECT_FALSE(webrtc::IsOpenMessage(openAck));
rtc::CopyOnWriteBuffer invalid(1);
invalid.MutableData()[0] = 0x01;
EXPECT_FALSE(webrtc::IsOpenMessage(invalid));
rtc::CopyOnWriteBuffer empty;
EXPECT_FALSE(webrtc::IsOpenMessage(empty));
}
TEST(SctpSidTest, Basics) {
// These static asserts are mostly here to aid with readability (i.e. knowing
// what these constants represent).
static_assert(cricket::kMinSctpSid == 0, "Min stream id should be 0");
static_assert(cricket::kMaxSctpSid <= cricket::kSpecMaxSctpSid, "");
static_assert(
cricket::kSpecMaxSctpSid == std::numeric_limits<uint16_t>::max(),
"Max legal sctp stream value should be 0xffff");
// cricket::kMaxSctpSid is a chosen value in the webrtc implementation,
// the highest generated `sid` value chosen for resource reservation reasons.
// It's one less than kMaxSctpStreams (1024) or 1023 since sid values are
// zero based.
EXPECT_TRUE(!StreamId(-1).HasValue());
EXPECT_TRUE(!StreamId(-2).HasValue());
EXPECT_TRUE(StreamId(cricket::kMinSctpSid).HasValue());
EXPECT_TRUE(StreamId(cricket::kMinSctpSid + 1).HasValue());
EXPECT_TRUE(StreamId(cricket::kSpecMaxSctpSid).HasValue());
EXPECT_TRUE(StreamId(cricket::kMaxSctpSid).HasValue());
// Two illegal values are equal (both not valid).
EXPECT_EQ(StreamId(-1), StreamId(-2));
// Two different, but legal, values, are not equal.
EXPECT_NE(StreamId(1), StreamId(2));
// Test operator<() for container compatibility.
EXPECT_LT(StreamId(1), StreamId(2));
// Test assignment, value() and reset().
StreamId sid1;
StreamId sid2(cricket::kMaxSctpSid);
EXPECT_NE(sid1, sid2);
sid1 = sid2;
EXPECT_EQ(sid1, sid2);
EXPECT_EQ(sid1.stream_id_int(), cricket::kMaxSctpSid);
EXPECT_TRUE(sid1.HasValue());
sid1.reset();
EXPECT_FALSE(sid1.HasValue());
}
|
