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
|
#include "ping_array.h"
#include <memory>
#include <gtest/gtest.h>
#include "mono_time.h"
namespace {
struct Ping_Array_Deleter {
void operator()(Ping_Array *arr) { ping_array_kill(arr); }
};
using Ping_Array_Ptr = std::unique_ptr<Ping_Array, Ping_Array_Deleter>;
struct Mono_Time_Deleter {
void operator()(Mono_Time *arr) { mono_time_free(arr); }
};
using Mono_Time_Ptr = std::unique_ptr<Mono_Time, Mono_Time_Deleter>;
TEST(PingArray, MinimumTimeoutIsOne) {
EXPECT_EQ(ping_array_new(1, 0), nullptr);
EXPECT_NE(Ping_Array_Ptr(ping_array_new(1, 1)), nullptr);
}
TEST(PingArray, MinimumArraySizeIsOne) {
EXPECT_EQ(ping_array_new(0, 1), nullptr);
EXPECT_NE(Ping_Array_Ptr(ping_array_new(1, 1)), nullptr);
}
TEST(PingArray, ArraySizeMustBePowerOfTwo) {
Ping_Array_Ptr arr;
arr.reset(ping_array_new(2, 1));
EXPECT_NE(arr, nullptr);
arr.reset(ping_array_new(4, 1));
EXPECT_NE(arr, nullptr);
arr.reset(ping_array_new(1024, 1));
EXPECT_NE(arr, nullptr);
EXPECT_EQ(ping_array_new(1023, 1), nullptr);
EXPECT_EQ(ping_array_new(1234, 1), nullptr);
}
TEST(PingArray, StoredDataCanBeRetrieved) {
Ping_Array_Ptr const arr(ping_array_new(2, 1));
Mono_Time_Ptr const mono_time(mono_time_new());
uint64_t const ping_id =
ping_array_add(arr.get(), mono_time.get(), std::vector<uint8_t>{1, 2, 3, 4}.data(), 4);
EXPECT_NE(ping_id, 0);
std::vector<uint8_t> data(4);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), data.data(), data.size(), ping_id), 4);
EXPECT_EQ(data, std::vector<uint8_t>({1, 2, 3, 4}));
}
TEST(PingArray, RetrievingDataWithTooSmallOutputBufferHasNoEffect) {
Ping_Array_Ptr const arr(ping_array_new(2, 1));
Mono_Time_Ptr const mono_time(mono_time_new());
uint64_t const ping_id =
ping_array_add(arr.get(), mono_time.get(), (std::vector<uint8_t>{1, 2, 3, 4}).data(), 4);
EXPECT_NE(ping_id, 0);
std::vector<uint8_t> data(4);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), data.data(), 3, ping_id), -1);
// It doesn't write anything to the data array.
EXPECT_EQ(data, std::vector<uint8_t>({0, 0, 0, 0}));
// Afterwards, we can still read it.
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), data.data(), 4, ping_id), 4);
EXPECT_EQ(data, std::vector<uint8_t>({1, 2, 3, 4}));
}
TEST(PingArray, ZeroLengthDataCanBeAdded) {
Ping_Array_Ptr const arr(ping_array_new(2, 1));
Mono_Time_Ptr const mono_time(mono_time_new());
uint64_t const ping_id = ping_array_add(arr.get(), mono_time.get(), nullptr, 0);
EXPECT_NE(ping_id, 0);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), nullptr, 0, ping_id), 0);
}
TEST(PingArray, PingId0IsInvalid) {
Ping_Array_Ptr const arr(ping_array_new(2, 1));
Mono_Time_Ptr const mono_time(mono_time_new());
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), nullptr, 0, 0), -1);
}
// Protection against replay attacks.
TEST(PingArray, DataCanOnlyBeRetrievedOnce) {
Ping_Array_Ptr const arr(ping_array_new(2, 1));
Mono_Time_Ptr const mono_time(mono_time_new());
uint64_t const ping_id = ping_array_add(arr.get(), mono_time.get(), nullptr, 0);
EXPECT_NE(ping_id, 0);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), nullptr, 0, ping_id), 0);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), nullptr, 0, ping_id), -1);
}
TEST(PingArray, PingIdMustMatchOnCheck) {
Ping_Array_Ptr const arr(ping_array_new(1, 1));
Mono_Time_Ptr const mono_time(mono_time_new());
uint64_t const ping_id = ping_array_add(arr.get(), mono_time.get(), nullptr, 0);
EXPECT_NE(ping_id, 0);
uint64_t const bad_ping_id = ping_id == 1 ? 2 : 1;
// bad_ping_id will also be pointing at the same element, but won't match the
// actual ping_id.
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), nullptr, 0, bad_ping_id), -1);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), nullptr, 0, ping_id), 0);
}
} // namespace
|
