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
|
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd linux netbsd openbsd
package test
import (
"bytes"
"io"
"io/ioutil"
"math/rand"
"net"
"testing"
"time"
)
func TestPortForward(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
sshListener, err := conn.Listen("tcp", "localhost:0")
if err != nil {
t.Fatal(err)
}
go func() {
sshConn, err := sshListener.Accept()
if err != nil {
t.Fatalf("listen.Accept failed: %v", err)
}
_, err = io.Copy(sshConn, sshConn)
if err != nil && err != io.EOF {
t.Fatalf("ssh client copy: %v", err)
}
sshConn.Close()
}()
forwardedAddr := sshListener.Addr().String()
tcpConn, err := net.Dial("tcp", forwardedAddr)
if err != nil {
t.Fatalf("TCP dial failed: %v", err)
}
readChan := make(chan []byte)
go func() {
data, _ := ioutil.ReadAll(tcpConn)
readChan <- data
}()
// Invent some data.
data := make([]byte, 100*1000)
for i := range data {
data[i] = byte(i % 255)
}
var sent []byte
for len(sent) < 1000*1000 {
// Send random sized chunks
m := rand.Intn(len(data))
n, err := tcpConn.Write(data[:m])
if err != nil {
break
}
sent = append(sent, data[:n]...)
}
if err := tcpConn.(*net.TCPConn).CloseWrite(); err != nil {
t.Errorf("tcpConn.CloseWrite: %v", err)
}
read := <-readChan
if len(sent) != len(read) {
t.Fatalf("got %d bytes, want %d", len(read), len(sent))
}
if bytes.Compare(sent, read) != 0 {
t.Fatalf("read back data does not match")
}
if err := sshListener.Close(); err != nil {
t.Fatalf("sshListener.Close: %v", err)
}
// Check that the forward disappeared.
tcpConn, err = net.Dial("tcp", forwardedAddr)
if err == nil {
tcpConn.Close()
t.Errorf("still listening to %s after closing", forwardedAddr)
}
}
func TestAcceptClose(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
sshListener, err := conn.Listen("tcp", "localhost:0")
if err != nil {
t.Fatal(err)
}
quit := make(chan error, 1)
go func() {
for {
c, err := sshListener.Accept()
if err != nil {
quit <- err
break
}
c.Close()
}
}()
sshListener.Close()
select {
case <-time.After(1 * time.Second):
t.Errorf("timeout: listener did not close.")
case err := <-quit:
t.Logf("quit as expected (error %v)", err)
}
}
// Check that listeners exit if the underlying client transport dies.
func TestPortForwardConnectionClose(t *testing.T) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
sshListener, err := conn.Listen("tcp", "localhost:0")
if err != nil {
t.Fatal(err)
}
quit := make(chan error, 1)
go func() {
for {
c, err := sshListener.Accept()
if err != nil {
quit <- err
break
}
c.Close()
}
}()
// It would be even nicer if we closed the server side, but it
// is more involved as the fd for that side is dup()ed.
server.clientConn.Close()
select {
case <-time.After(1 * time.Second):
t.Errorf("timeout: listener did not close.")
case err := <-quit:
t.Logf("quit as expected (error %v)", err)
}
}
|
