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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
|
package quic
import (
"crypto/rand"
"testing"
"github.com/quic-go/quic-go/internal/protocol"
"github.com/quic-go/quic-go/internal/qerr"
"github.com/quic-go/quic-go/internal/wire"
"github.com/stretchr/testify/require"
)
func TestConnIDManagerInitialConnID(t *testing.T) {
m := newConnIDManager(protocol.ParseConnectionID([]byte{1, 2, 3, 4}), nil, nil, nil)
require.Equal(t, protocol.ParseConnectionID([]byte{1, 2, 3, 4}), m.Get())
require.Equal(t, protocol.ParseConnectionID([]byte{1, 2, 3, 4}), m.Get())
m.ChangeInitialConnID(protocol.ParseConnectionID([]byte{5, 6, 7, 8}))
require.Equal(t, protocol.ParseConnectionID([]byte{5, 6, 7, 8}), m.Get())
}
func TestConnIDManagerAddConnIDs(t *testing.T) {
m := newConnIDManager(
protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
func(protocol.StatelessResetToken) {},
func(protocol.StatelessResetToken) {},
func(wire.Frame) {},
)
f1 := &wire.NewConnectionIDFrame{
SequenceNumber: 1,
ConnectionID: protocol.ParseConnectionID([]byte{0xde, 0xad, 0xbe, 0xef}),
StatelessResetToken: protocol.StatelessResetToken{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe},
}
f2 := &wire.NewConnectionIDFrame{
SequenceNumber: 2,
ConnectionID: protocol.ParseConnectionID([]byte{0xba, 0xad, 0xf0, 0x0d}),
StatelessResetToken: protocol.StatelessResetToken{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe},
}
require.NoError(t, m.Add(f2))
require.NoError(t, m.Add(f1)) // receiving reordered frames is fine
require.NoError(t, m.Add(f2)) // receiving a duplicate is fine
require.Equal(t, protocol.ParseConnectionID([]byte{1, 2, 3, 4}), m.Get())
m.updateConnectionID()
require.Equal(t, protocol.ParseConnectionID([]byte{0xde, 0xad, 0xbe, 0xef}), m.Get())
m.updateConnectionID()
require.Equal(t, protocol.ParseConnectionID([]byte{0xba, 0xad, 0xf0, 0x0d}), m.Get())
require.NoError(t, m.Add(f2)) // receiving a duplicate for the current connection ID is fine as well
require.Equal(t, protocol.ParseConnectionID([]byte{0xba, 0xad, 0xf0, 0x0d}), m.Get())
// receiving mismatching connection IDs is not fine
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 3,
ConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4}), // mismatching connection ID
StatelessResetToken: protocol.StatelessResetToken{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe},
}))
require.EqualError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 3,
ConnectionID: protocol.ParseConnectionID([]byte{2, 3, 4, 5}), // mismatching connection ID
StatelessResetToken: protocol.StatelessResetToken{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe},
}), "received conflicting connection IDs for sequence number 3")
// receiving mismatching stateless reset tokens is not fine either
require.EqualError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 3,
ConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
StatelessResetToken: protocol.StatelessResetToken{1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe, 0},
}), "received conflicting stateless reset tokens for sequence number 3")
}
func TestConnIDManagerLimit(t *testing.T) {
m := newConnIDManager(
protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
func(protocol.StatelessResetToken) {},
func(protocol.StatelessResetToken) {},
func(f wire.Frame) {},
)
for i := uint8(1); i < protocol.MaxActiveConnectionIDs; i++ {
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: uint64(i),
ConnectionID: protocol.ParseConnectionID([]byte{i, i, i, i}),
StatelessResetToken: protocol.StatelessResetToken{i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i},
}))
}
require.Equal(t, &qerr.TransportError{ErrorCode: qerr.ConnectionIDLimitError}, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: uint64(9999),
ConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
StatelessResetToken: protocol.StatelessResetToken{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16},
}))
}
func TestConnIDManagerRetiringConnectionIDs(t *testing.T) {
var frameQueue []wire.Frame
m := newConnIDManager(
protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
func(protocol.StatelessResetToken) {},
func(protocol.StatelessResetToken) {},
func(f wire.Frame) { frameQueue = append(frameQueue, f) },
)
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 10,
ConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
}))
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 13,
ConnectionID: protocol.ParseConnectionID([]byte{2, 3, 4, 5}),
}))
require.Empty(t, frameQueue)
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
RetirePriorTo: 14,
SequenceNumber: 17,
ConnectionID: protocol.ParseConnectionID([]byte{3, 4, 5, 6}),
}))
require.Equal(t, []wire.Frame{
&wire.RetireConnectionIDFrame{SequenceNumber: 10},
&wire.RetireConnectionIDFrame{SequenceNumber: 13},
&wire.RetireConnectionIDFrame{SequenceNumber: 0},
}, frameQueue)
require.Equal(t, protocol.ParseConnectionID([]byte{3, 4, 5, 6}), m.Get())
frameQueue = nil
// a reordered connection ID is immediately retired
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 12,
ConnectionID: protocol.ParseConnectionID([]byte{5, 6, 7, 8}),
}))
require.Equal(t, []wire.Frame{&wire.RetireConnectionIDFrame{SequenceNumber: 12}}, frameQueue)
require.Equal(t, protocol.ParseConnectionID([]byte{3, 4, 5, 6}), m.Get())
}
func TestConnIDManagerHandshakeCompletion(t *testing.T) {
var frameQueue []wire.Frame
var addedTokens, removedTokens []protocol.StatelessResetToken
m := newConnIDManager(
protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
func(token protocol.StatelessResetToken) { addedTokens = append(addedTokens, token) },
func(token protocol.StatelessResetToken) { removedTokens = append(removedTokens, token) },
func(f wire.Frame) { frameQueue = append(frameQueue, f) },
)
m.SetStatelessResetToken(protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1})
require.Equal(t, []protocol.StatelessResetToken{{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1}}, addedTokens)
require.Empty(t, removedTokens)
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 1,
ConnectionID: protocol.ParseConnectionID([]byte{4, 3, 2, 1}),
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}))
require.Equal(t, protocol.ParseConnectionID([]byte{1, 2, 3, 4}), m.Get())
m.SetHandshakeComplete()
require.Equal(t, protocol.ParseConnectionID([]byte{4, 3, 2, 1}), m.Get())
require.Equal(t, []wire.Frame{&wire.RetireConnectionIDFrame{SequenceNumber: 0}}, frameQueue)
require.Equal(t, []protocol.StatelessResetToken{{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1}}, removedTokens)
}
func TestConnIDManagerConnIDRotation(t *testing.T) {
var frameQueue []wire.Frame
m := newConnIDManager(
protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
func(protocol.StatelessResetToken) {},
func(protocol.StatelessResetToken) {},
func(f wire.Frame) { frameQueue = append(frameQueue, f) },
)
// the first connection ID is used as soon as the handshake is complete
m.SetHandshakeComplete()
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 1,
ConnectionID: protocol.ParseConnectionID([]byte{4, 3, 2, 1}),
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}))
require.Equal(t, protocol.ParseConnectionID([]byte{4, 3, 2, 1}), m.Get())
frameQueue = nil
// Note that we're missing the connection ID with sequence number 2.
// It will be received later.
var queuedConnIDs []protocol.ConnectionID
for i := 0; i < protocol.MaxActiveConnectionIDs-1; i++ {
b := make([]byte, 4)
rand.Read(b)
connID := protocol.ParseConnectionID(b)
queuedConnIDs = append(queuedConnIDs, connID)
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: uint64(3 + i),
ConnectionID: connID,
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}))
}
var counter int
for {
require.Empty(t, frameQueue)
m.SentPacket()
counter++
if m.Get() != protocol.ParseConnectionID([]byte{4, 3, 2, 1}) {
require.Equal(t, queuedConnIDs[0], m.Get())
require.Equal(t, []wire.Frame{&wire.RetireConnectionIDFrame{SequenceNumber: 1}}, frameQueue)
break
}
}
require.GreaterOrEqual(t, counter, protocol.PacketsPerConnectionID/2)
require.LessOrEqual(t, counter, protocol.PacketsPerConnectionID*3/2)
frameQueue = nil
// now receive connection ID 2
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 2,
ConnectionID: protocol.ParseConnectionID([]byte{2, 3, 4, 5}),
}))
require.Equal(t, []wire.Frame{&wire.RetireConnectionIDFrame{SequenceNumber: 2}}, frameQueue)
}
func TestConnIDManagerPathMigration(t *testing.T) {
var frameQueue []wire.Frame
m := newConnIDManager(
protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
func(protocol.StatelessResetToken) {},
func(protocol.StatelessResetToken) {},
func(f wire.Frame) { frameQueue = append(frameQueue, f) },
)
// no connection ID available yet
_, ok := m.GetConnIDForPath(1)
require.False(t, ok)
// add a connection ID
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 1,
ConnectionID: protocol.ParseConnectionID([]byte{4, 3, 2, 1}),
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}))
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 2,
ConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2}),
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}))
connID, ok := m.GetConnIDForPath(1)
require.True(t, ok)
require.Equal(t, protocol.ParseConnectionID([]byte{4, 3, 2, 1}), connID)
connID, ok = m.GetConnIDForPath(2)
require.True(t, ok)
require.Equal(t, protocol.ParseConnectionID([]byte{5, 4, 3, 2}), connID)
// asking for the connection for path 1 again returns the same connection ID
connID, ok = m.GetConnIDForPath(1)
require.True(t, ok)
require.Equal(t, protocol.ParseConnectionID([]byte{4, 3, 2, 1}), connID)
// if the connection ID is retired, the path will use another connection ID
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 3,
RetirePriorTo: 2,
ConnectionID: protocol.ParseConnectionID([]byte{6, 5, 4, 3}),
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}))
require.Len(t, frameQueue, 2)
frameQueue = nil
require.Equal(t, protocol.ParseConnectionID([]byte{6, 5, 4, 3}), m.Get())
// the connection ID is not used for new paths
_, ok = m.GetConnIDForPath(3)
require.False(t, ok)
// Manually retiring the connection ID does nothing.
// Path 1 doesn't have a connection ID anymore.
m.RetireConnIDForPath(1)
require.Empty(t, frameQueue)
_, ok = m.GetConnIDForPath(1)
require.False(t, ok)
// only after a new connection ID is added, it will be used for path 1
require.NoError(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 4,
ConnectionID: protocol.ParseConnectionID([]byte{7, 6, 5, 4}),
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}))
connID, ok = m.GetConnIDForPath(1)
require.True(t, ok)
require.Equal(t, protocol.ParseConnectionID([]byte{7, 6, 5, 4}), connID)
// a RETIRE_CONNECTION_ID frame for path 1 is queued when retiring the connection ID
m.RetireConnIDForPath(1)
require.Equal(t, []wire.Frame{&wire.RetireConnectionIDFrame{SequenceNumber: 4}}, frameQueue)
}
func TestConnIDManagerZeroLengthConnectionID(t *testing.T) {
m := newConnIDManager(
protocol.ConnectionID{},
func(protocol.StatelessResetToken) {},
func(protocol.StatelessResetToken) {},
func(f wire.Frame) {},
)
require.Equal(t, protocol.ConnectionID{}, m.Get())
for i := 0; i < 5*protocol.PacketsPerConnectionID; i++ {
m.SentPacket()
require.Equal(t, protocol.ConnectionID{}, m.Get())
}
// for path probing, we don't need to change the connection ID
for id := pathID(1); id < 10; id++ {
connID, ok := m.GetConnIDForPath(id)
require.True(t, ok)
require.Equal(t, protocol.ConnectionID{}, connID)
}
// retiring a connection ID for a path is also a no-op
for id := pathID(1); id < 20; id++ {
m.RetireConnIDForPath(id)
}
require.ErrorIs(t, m.Add(&wire.NewConnectionIDFrame{
SequenceNumber: 1,
ConnectionID: protocol.ConnectionID{},
StatelessResetToken: protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1},
}), &qerr.TransportError{ErrorCode: qerr.ProtocolViolation})
}
func TestConnIDManagerClose(t *testing.T) {
var addedTokens, removedTokens []protocol.StatelessResetToken
m := newConnIDManager(
protocol.ParseConnectionID([]byte{1, 2, 3, 4}),
func(token protocol.StatelessResetToken) { addedTokens = append(addedTokens, token) },
func(token protocol.StatelessResetToken) { removedTokens = append(removedTokens, token) },
func(f wire.Frame) {},
)
m.SetStatelessResetToken(protocol.StatelessResetToken{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1})
require.Equal(t, []protocol.StatelessResetToken{{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1}}, addedTokens)
require.Empty(t, removedTokens)
m.Close()
require.Equal(t, []protocol.StatelessResetToken{{16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1}}, removedTokens)
require.Panics(t, func() { m.Get() })
require.Panics(t, func() { m.SetStatelessResetToken(protocol.StatelessResetToken{}) })
}
|
