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
|
// Copyright 2018 Google Inc.
//
// 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.googlesource.com/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")
)
func TestPortReservation(t *testing.T) {
pm := NewPortManager()
net := []tcpip.NetworkProtocolNumber{fakeNetworkNumber}
for _, test := range []struct {
port uint16
ip tcpip.Address
want *tcpip.Error
}{
{
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: 22,
ip: anyIPAddress,
want: nil,
},
{
port: 22,
ip: fakeIPAddress,
want: tcpip.ErrPortInUse,
},
{
port: 0,
ip: fakeIPAddress,
want: nil,
},
{
port: 0,
ip: fakeIPAddress,
want: nil,
},
} {
gotPort, err := pm.ReservePort(net, fakeTransNumber, test.ip, test.port)
if err != test.want {
t.Fatalf("ReservePort(.., .., %s, %d) = %v, want %v", test.ip, test.port, 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)
}
}
// Release port 22 from any IP address, then try to reserve fake IP
// address on 22.
pm.ReleasePort(net, fakeTransNumber, anyIPAddress, 22)
if port, err := pm.ReservePort(net, fakeTransNumber, fakeIPAddress, 22); port != 22 || err != nil {
t.Fatalf("ReservePort(.., .., .., %d) = (port %d, err %v), want (22, nil); failed to reserve port after it should have been released", 22, port, err)
}
}
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)
}
})
}
}
|
