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
|
// Copyright 2009 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.
package net
import (
"flag"
"fmt"
"io"
"strings"
"syscall"
"testing"
)
// If an IPv6 tunnel is running, we can try dialing a real IPv6 address.
var ipv6 = flag.Bool("ipv6", false, "assume ipv6 tunnel is present")
// fd is already connected to the destination, port 80.
// Run an HTTP request to fetch the appropriate page.
func fetchGoogle(t *testing.T, fd Conn, network, addr string) {
req := []byte("GET /robots.txt HTTP/1.0\r\nHost: www.google.com\r\n\r\n")
n, err := fd.Write(req)
buf := make([]byte, 1000)
n, err = io.ReadFull(fd, buf)
if n < 1000 {
t.Errorf("fetchGoogle: short HTTP read from %s %s - %v", network, addr, err)
return
}
}
func doDial(t *testing.T, network, addr string) {
fd, err := Dial(network, addr)
if err != nil {
t.Errorf("Dial(%q, %q, %q) = _, %v", network, "", addr, err)
return
}
fetchGoogle(t, fd, network, addr)
fd.Close()
}
func TestLookupCNAME(t *testing.T) {
if testing.Short() {
// Don't use external network.
t.Logf("skipping external network test during -short")
return
}
cname, err := LookupCNAME("www.google.com")
if !strings.HasSuffix(cname, ".l.google.com.") || err != nil {
t.Errorf(`LookupCNAME("www.google.com.") = %q, %v, want "*.l.google.com.", nil`, cname, err)
}
}
var googleaddrsipv4 = []string{
"%d.%d.%d.%d:80",
"www.google.com:80",
"%d.%d.%d.%d:http",
"www.google.com:http",
"%03d.%03d.%03d.%03d:0080",
"[::ffff:%d.%d.%d.%d]:80",
"[::ffff:%02x%02x:%02x%02x]:80",
"[0:0:0:0:0000:ffff:%d.%d.%d.%d]:80",
"[0:0:0:0:000000:ffff:%d.%d.%d.%d]:80",
"[0:0:0:0:0:ffff::%d.%d.%d.%d]:80",
}
func TestDialGoogleIPv4(t *testing.T) {
if testing.Short() {
// Don't use external network.
t.Logf("skipping external network test during -short")
return
}
// Insert an actual IPv4 address for google.com
// into the table.
addrs, err := LookupIP("www.google.com")
if err != nil {
t.Fatalf("lookup www.google.com: %v", err)
}
var ip IP
for _, addr := range addrs {
if x := addr.To4(); x != nil {
ip = x
break
}
}
if ip == nil {
t.Fatalf("no IPv4 addresses for www.google.com")
}
for i, s := range googleaddrsipv4 {
if strings.Contains(s, "%") {
googleaddrsipv4[i] = fmt.Sprintf(s, ip[0], ip[1], ip[2], ip[3])
}
}
for i := 0; i < len(googleaddrsipv4); i++ {
addr := googleaddrsipv4[i]
if addr == "" {
continue
}
t.Logf("-- %s --", addr)
doDial(t, "tcp", addr)
if addr[0] != '[' {
doDial(t, "tcp4", addr)
if supportsIPv6 {
// make sure syscall.SocketDisableIPv6 flag works.
syscall.SocketDisableIPv6 = true
doDial(t, "tcp", addr)
doDial(t, "tcp4", addr)
syscall.SocketDisableIPv6 = false
}
}
}
}
var googleaddrsipv6 = []string{
"[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]:80",
"ipv6.google.com:80",
"[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]:http",
"ipv6.google.com:http",
}
func TestDialGoogleIPv6(t *testing.T) {
if testing.Short() {
// Don't use external network.
t.Logf("skipping external network test during -short")
return
}
// Only run tcp6 if the kernel will take it.
if !*ipv6 || !supportsIPv6 {
return
}
// Insert an actual IPv6 address for ipv6.google.com
// into the table.
addrs, err := LookupIP("ipv6.google.com")
if err != nil {
t.Fatalf("lookup ipv6.google.com: %v", err)
}
var ip IP
for _, addr := range addrs {
if x := addr.To16(); x != nil {
ip = x
break
}
}
if ip == nil {
t.Fatalf("no IPv6 addresses for ipv6.google.com")
}
for i, s := range googleaddrsipv6 {
if strings.Contains(s, "%") {
googleaddrsipv6[i] = fmt.Sprintf(s, ip[0], ip[1], ip[2], ip[3], ip[4], ip[5], ip[6], ip[7], ip[8], ip[9], ip[10], ip[11], ip[12], ip[13], ip[14], ip[15])
}
}
for i := 0; i < len(googleaddrsipv6); i++ {
addr := googleaddrsipv6[i]
if addr == "" {
continue
}
t.Logf("-- %s --", addr)
doDial(t, "tcp", addr)
doDial(t, "tcp6", addr)
}
}
|
