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
|
// Copyright 2018 The gVisor Authors.
//
// 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.
package ports
import (
"testing"
"gvisor.dev/gvisor/pkg/tcpip"
)
const (
fakeTransNumber tcpip.TransportProtocolNumber = 1
fakeNetworkNumber tcpip.NetworkProtocolNumber = 2
fakeIPAddress = tcpip.Address("\x08\x08\x08\x08")
fakeIPAddress1 = tcpip.Address("\x08\x08\x08\x09")
)
type portReserveTestAction struct {
port uint16
ip tcpip.Address
want *tcpip.Error
reuse bool
release bool
device tcpip.NICID
}
func TestPortReservation(t *testing.T) {
for _, test := range []struct {
tname string
actions []portReserveTestAction
}{
{
tname: "bind to ip",
actions: []portReserveTestAction{
{port: 80, ip: fakeIPAddress, want: nil},
{port: 80, ip: fakeIPAddress1, want: nil},
/* N.B. Order of tests matters! */
{port: 80, ip: anyIPAddress, want: tcpip.ErrPortInUse},
{port: 80, ip: fakeIPAddress, want: tcpip.ErrPortInUse, reuse: true},
},
},
{
tname: "bind to inaddr any",
actions: []portReserveTestAction{
{port: 22, ip: anyIPAddress, want: nil},
{port: 22, ip: fakeIPAddress, want: tcpip.ErrPortInUse},
/* release fakeIPAddress, but anyIPAddress is still inuse */
{port: 22, ip: fakeIPAddress, release: true},
{port: 22, ip: fakeIPAddress, want: tcpip.ErrPortInUse},
{port: 22, ip: fakeIPAddress, want: tcpip.ErrPortInUse, reuse: true},
/* Release port 22 from any IP address, then try to reserve fake IP address on 22 */
{port: 22, ip: anyIPAddress, want: nil, release: true},
{port: 22, ip: fakeIPAddress, want: nil},
},
}, {
tname: "bind to zero port",
actions: []portReserveTestAction{
{port: 00, ip: fakeIPAddress, want: nil},
{port: 00, ip: fakeIPAddress, want: nil},
{port: 00, ip: fakeIPAddress, reuse: true, want: nil},
},
}, {
tname: "bind to ip with reuseport",
actions: []portReserveTestAction{
{port: 25, ip: fakeIPAddress, reuse: true, want: nil},
{port: 25, ip: fakeIPAddress, reuse: true, want: nil},
{port: 25, ip: fakeIPAddress, reuse: false, want: tcpip.ErrPortInUse},
{port: 25, ip: anyIPAddress, reuse: false, want: tcpip.ErrPortInUse},
{port: 25, ip: anyIPAddress, reuse: true, want: nil},
},
}, {
tname: "bind to inaddr any with reuseport",
actions: []portReserveTestAction{
{port: 24, ip: anyIPAddress, reuse: true, want: nil},
{port: 24, ip: anyIPAddress, reuse: true, want: nil},
{port: 24, ip: anyIPAddress, reuse: false, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, reuse: false, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, release: true, want: nil},
{port: 24, ip: anyIPAddress, release: true},
{port: 24, ip: anyIPAddress, reuse: false, want: tcpip.ErrPortInUse},
{port: 24, ip: anyIPAddress, release: true},
{port: 24, ip: anyIPAddress, reuse: false, want: nil},
},
}, {
tname: "bind twice with device fails",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 3, want: nil},
{port: 24, ip: fakeIPAddress, device: 3, want: tcpip.ErrPortInUse},
},
}, {
tname: "bind to device",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 1, want: nil},
{port: 24, ip: fakeIPAddress, device: 2, want: nil},
},
}, {
tname: "bind to device and then without device",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, want: nil},
{port: 24, ip: fakeIPAddress, device: 0, want: tcpip.ErrPortInUse},
},
}, {
tname: "bind without device",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, want: nil},
{port: 24, ip: fakeIPAddress, device: 123, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, reuse: true, want: tcpip.ErrPortInUse},
},
}, {
tname: "bind with device",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, want: nil},
{port: 24, ip: fakeIPAddress, device: 123, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 0, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 0, reuse: true, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 456, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 789, want: nil},
{port: 24, ip: fakeIPAddress, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, reuse: true, want: tcpip.ErrPortInUse},
},
}, {
tname: "bind with reuse",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 123, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 0, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 0, reuse: true, want: nil},
},
}, {
tname: "binding with reuse and device",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 123, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 0, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 456, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 0, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 789, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 999, want: tcpip.ErrPortInUse},
},
}, {
tname: "mixing reuse and not reuse by binding to device",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 456, want: nil},
{port: 24, ip: fakeIPAddress, device: 789, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 999, want: nil},
},
}, {
tname: "can't bind to 0 after mixing reuse and not reuse",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 456, want: nil},
{port: 24, ip: fakeIPAddress, device: 0, reuse: true, want: tcpip.ErrPortInUse},
},
}, {
tname: "bind and release",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 0, reuse: true, want: nil},
{port: 24, ip: fakeIPAddress, device: 345, reuse: false, want: tcpip.ErrPortInUse},
{port: 24, ip: fakeIPAddress, device: 789, reuse: true, want: nil},
// Release the bind to device 0 and try again.
{port: 24, ip: fakeIPAddress, device: 0, reuse: true, want: nil, release: true},
{port: 24, ip: fakeIPAddress, device: 345, reuse: false, want: nil},
},
}, {
tname: "bind twice with reuse once",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, reuse: false, want: nil},
{port: 24, ip: fakeIPAddress, device: 0, reuse: true, want: tcpip.ErrPortInUse},
},
}, {
tname: "release an unreserved device",
actions: []portReserveTestAction{
{port: 24, ip: fakeIPAddress, device: 123, reuse: false, want: nil},
{port: 24, ip: fakeIPAddress, device: 456, reuse: false, want: nil},
// The below don't exist.
{port: 24, ip: fakeIPAddress, device: 345, reuse: false, want: nil, release: true},
{port: 9999, ip: fakeIPAddress, device: 123, reuse: false, want: nil, release: true},
// Release all.
{port: 24, ip: fakeIPAddress, device: 123, reuse: false, want: nil, release: true},
{port: 24, ip: fakeIPAddress, device: 456, reuse: false, want: nil, release: true},
},
},
} {
t.Run(test.tname, func(t *testing.T) {
pm := NewPortManager()
net := []tcpip.NetworkProtocolNumber{fakeNetworkNumber}
for _, test := range test.actions {
if test.release {
pm.ReleasePort(net, fakeTransNumber, test.ip, test.port, test.device)
continue
}
gotPort, err := pm.ReservePort(net, fakeTransNumber, test.ip, test.port, test.reuse, test.device)
if err != test.want {
t.Fatalf("ReservePort(.., .., %s, %d, %t, %d) = %v, want %v", test.ip, test.port, test.reuse, test.device, err, test.want)
}
if test.port == 0 && (gotPort == 0 || gotPort < FirstEphemeral) {
t.Fatalf("ReservePort(.., .., .., 0) = %d, want port number >= %d to be picked", gotPort, FirstEphemeral)
}
}
})
}
}
func TestPickEphemeralPort(t *testing.T) {
pm := NewPortManager()
customErr := &tcpip.Error{}
for _, test := range []struct {
name string
f func(port uint16) (bool, *tcpip.Error)
wantErr *tcpip.Error
wantPort uint16
}{
{
name: "no-port-available",
f: func(port uint16) (bool, *tcpip.Error) {
return false, nil
},
wantErr: tcpip.ErrNoPortAvailable,
},
{
name: "port-tester-error",
f: func(port uint16) (bool, *tcpip.Error) {
return false, customErr
},
wantErr: customErr,
},
{
name: "only-port-16042-available",
f: func(port uint16) (bool, *tcpip.Error) {
if port == FirstEphemeral+42 {
return true, nil
}
return false, nil
},
wantPort: FirstEphemeral + 42,
},
{
name: "only-port-under-16000-available",
f: func(port uint16) (bool, *tcpip.Error) {
if port < FirstEphemeral {
return true, nil
}
return false, nil
},
wantErr: tcpip.ErrNoPortAvailable,
},
} {
t.Run(test.name, func(t *testing.T) {
if port, err := pm.PickEphemeralPort(test.f); port != test.wantPort || err != test.wantErr {
t.Errorf("PickEphemeralPort(..) = (port %d, err %v); want (port %d, err %v)", port, err, test.wantPort, test.wantErr)
}
})
}
}
|
