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
|
package nebula
import (
"testing"
"github.com/slackhq/nebula/test"
"github.com/stretchr/testify/assert"
)
func TestBits(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
// make sure it is the right size
assert.Len(t, b.bits, 10)
// This is initialized to zero - receive one. This should work.
assert.True(t, b.Check(l, 1))
u := b.Update(l, 1)
assert.True(t, u)
assert.EqualValues(t, 1, b.current)
g := []bool{false, true, false, false, false, false, false, false, false, false}
assert.Equal(t, g, b.bits)
// Receive two
assert.True(t, b.Check(l, 2))
u = b.Update(l, 2)
assert.True(t, u)
assert.EqualValues(t, 2, b.current)
g = []bool{false, true, true, false, false, false, false, false, false, false}
assert.Equal(t, g, b.bits)
// Receive two again - it will fail
assert.False(t, b.Check(l, 2))
u = b.Update(l, 2)
assert.False(t, u)
assert.EqualValues(t, 2, b.current)
// Jump ahead to 15, which should clear everything and set the 6th element
assert.True(t, b.Check(l, 15))
u = b.Update(l, 15)
assert.True(t, u)
assert.EqualValues(t, 15, b.current)
g = []bool{false, false, false, false, false, true, false, false, false, false}
assert.Equal(t, g, b.bits)
// Mark 14, which is allowed because it is in the window
assert.True(t, b.Check(l, 14))
u = b.Update(l, 14)
assert.True(t, u)
assert.EqualValues(t, 15, b.current)
g = []bool{false, false, false, false, true, true, false, false, false, false}
assert.Equal(t, g, b.bits)
// Mark 5, which is not allowed because it is not in the window
assert.False(t, b.Check(l, 5))
u = b.Update(l, 5)
assert.False(t, u)
assert.EqualValues(t, 15, b.current)
g = []bool{false, false, false, false, true, true, false, false, false, false}
assert.Equal(t, g, b.bits)
// make sure we handle wrapping around once to the current position
b = NewBits(10)
assert.True(t, b.Update(l, 1))
assert.True(t, b.Update(l, 11))
assert.Equal(t, []bool{false, true, false, false, false, false, false, false, false, false}, b.bits)
// Walk through a few windows in order
b = NewBits(10)
for i := uint64(0); i <= 100; i++ {
assert.True(t, b.Check(l, i), "Error while checking %v", i)
assert.True(t, b.Update(l, i), "Error while updating %v", i)
}
}
func TestBitsDupeCounter(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 1))
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.False(t, b.Update(l, 1))
assert.Equal(t, int64(1), b.dupeCounter.Count())
assert.True(t, b.Update(l, 2))
assert.Equal(t, int64(1), b.dupeCounter.Count())
assert.True(t, b.Update(l, 3))
assert.Equal(t, int64(1), b.dupeCounter.Count())
assert.False(t, b.Update(l, 1))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.Equal(t, int64(2), b.dupeCounter.Count())
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
}
func TestBitsOutOfWindowCounter(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 20))
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
assert.True(t, b.Update(l, 21))
assert.True(t, b.Update(l, 22))
assert.True(t, b.Update(l, 23))
assert.True(t, b.Update(l, 24))
assert.True(t, b.Update(l, 25))
assert.True(t, b.Update(l, 26))
assert.True(t, b.Update(l, 27))
assert.True(t, b.Update(l, 28))
assert.True(t, b.Update(l, 29))
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
assert.False(t, b.Update(l, 0))
assert.Equal(t, int64(1), b.outOfWindowCounter.Count())
//tODO: make sure lostcounter doesn't increase in orderly increment
assert.Equal(t, int64(20), b.lostCounter.Count())
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.Equal(t, int64(1), b.outOfWindowCounter.Count())
}
func TestBitsLostCounter(t *testing.T) {
l := test.NewLogger()
b := NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
//assert.True(t, b.Update(0))
assert.True(t, b.Update(l, 0))
assert.True(t, b.Update(l, 20))
assert.True(t, b.Update(l, 21))
assert.True(t, b.Update(l, 22))
assert.True(t, b.Update(l, 23))
assert.True(t, b.Update(l, 24))
assert.True(t, b.Update(l, 25))
assert.True(t, b.Update(l, 26))
assert.True(t, b.Update(l, 27))
assert.True(t, b.Update(l, 28))
assert.True(t, b.Update(l, 29))
assert.Equal(t, int64(20), b.lostCounter.Count())
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
b = NewBits(10)
b.lostCounter.Clear()
b.dupeCounter.Clear()
b.outOfWindowCounter.Clear()
assert.True(t, b.Update(l, 0))
assert.Equal(t, int64(0), b.lostCounter.Count())
assert.True(t, b.Update(l, 9))
assert.Equal(t, int64(0), b.lostCounter.Count())
// 10 will set 0 index, 0 was already set, no lost packets
assert.True(t, b.Update(l, 10))
assert.Equal(t, int64(0), b.lostCounter.Count())
// 11 will set 1 index, 1 was missed, we should see 1 packet lost
assert.True(t, b.Update(l, 11))
assert.Equal(t, int64(1), b.lostCounter.Count())
// Now let's fill in the window, should end up with 8 lost packets
assert.True(t, b.Update(l, 12))
assert.True(t, b.Update(l, 13))
assert.True(t, b.Update(l, 14))
assert.True(t, b.Update(l, 15))
assert.True(t, b.Update(l, 16))
assert.True(t, b.Update(l, 17))
assert.True(t, b.Update(l, 18))
assert.True(t, b.Update(l, 19))
assert.Equal(t, int64(8), b.lostCounter.Count())
// Jump ahead by a window size
assert.True(t, b.Update(l, 29))
assert.Equal(t, int64(8), b.lostCounter.Count())
// Now lets walk ahead normally through the window, the missed packets should fill in
assert.True(t, b.Update(l, 30))
assert.True(t, b.Update(l, 31))
assert.True(t, b.Update(l, 32))
assert.True(t, b.Update(l, 33))
assert.True(t, b.Update(l, 34))
assert.True(t, b.Update(l, 35))
assert.True(t, b.Update(l, 36))
assert.True(t, b.Update(l, 37))
assert.True(t, b.Update(l, 38))
// 39 packets tracked, 22 seen, 17 lost
assert.Equal(t, int64(17), b.lostCounter.Count())
// Jump ahead by 2 windows, should have recording 1 full window missing
assert.True(t, b.Update(l, 58))
assert.Equal(t, int64(27), b.lostCounter.Count())
// Now lets walk ahead normally through the window, the missed packets should fill in from this window
assert.True(t, b.Update(l, 59))
assert.True(t, b.Update(l, 60))
assert.True(t, b.Update(l, 61))
assert.True(t, b.Update(l, 62))
assert.True(t, b.Update(l, 63))
assert.True(t, b.Update(l, 64))
assert.True(t, b.Update(l, 65))
assert.True(t, b.Update(l, 66))
assert.True(t, b.Update(l, 67))
// 68 packets tracked, 32 seen, 36 missed
assert.Equal(t, int64(36), b.lostCounter.Count())
assert.Equal(t, int64(0), b.dupeCounter.Count())
assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
}
func BenchmarkBits(b *testing.B) {
z := NewBits(10)
for n := 0; n < b.N; n++ {
for i := range z.bits {
z.bits[i] = true
}
for i := range z.bits {
z.bits[i] = false
}
}
}
|
