1 // Copyright 2009 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
17 func TestResolveGoogle(t *testing.T) {
18 testenv.MustHaveExternalNetwork(t)
20 if !supportsIPv4() || !supportsIPv6() || !*testIPv4 || !*testIPv6 {
21 t.Skip("both IPv4 and IPv6 are required")
24 for _, network := range []string{"tcp", "tcp4", "tcp6"} {
25 addr, err := ResolveTCPAddr(network, "www.google.com:http")
31 case network == "tcp" && addr.IP.To4() == nil:
33 case network == "tcp4" && addr.IP.To4() == nil:
34 t.Errorf("got %v; want an IPv4 address on %s", addr, network)
35 case network == "tcp6" && (addr.IP.To16() == nil || addr.IP.To4() != nil):
36 t.Errorf("got %v; want an IPv6 address on %s", addr, network)
41 var dialGoogleTests = []struct {
42 dial func(string, string) (Conn, error)
43 unreachableNetwork string
48 dial: (&Dialer{DualStack: true}).Dial,
49 networks: []string{"tcp", "tcp4", "tcp6"},
50 addrs: []string{"www.google.com:http"},
54 unreachableNetwork: "tcp6",
55 networks: []string{"tcp", "tcp4"},
59 unreachableNetwork: "tcp4",
60 networks: []string{"tcp", "tcp6"},
64 func TestDialGoogle(t *testing.T) {
65 testenv.MustHaveExternalNetwork(t)
67 if !supportsIPv4() || !supportsIPv6() || !*testIPv4 || !*testIPv6 {
68 t.Skip("both IPv4 and IPv6 are required")
72 dialGoogleTests[1].addrs, dialGoogleTests[2].addrs, err = googleLiteralAddrs()
76 for _, tt := range dialGoogleTests {
77 for _, network := range tt.networks {
78 disableSocketConnect(tt.unreachableNetwork)
79 for _, addr := range tt.addrs {
80 if err := fetchGoogle(tt.dial, network, addr); err != nil {
90 literalAddrs4 = [...]string{
94 "www.google.com:http",
95 "%03d.%03d.%03d.%03d:0080",
96 "[::ffff:%d.%d.%d.%d]:80",
97 "[::ffff:%02x%02x:%02x%02x]:80",
98 "[0:0:0:0:0000:ffff:%d.%d.%d.%d]:80",
99 "[0:0:0:0:000000:ffff:%d.%d.%d.%d]:80",
100 "[0:0:0:0::ffff:%d.%d.%d.%d]:80",
102 literalAddrs6 = [...]string{
103 "[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]:80",
104 "ipv6.google.com:80",
105 "[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]:http",
106 "ipv6.google.com:http",
110 func googleLiteralAddrs() (lits4, lits6 []string, err error) {
111 ips, err := LookupIP("www.google.com")
119 for _, ip := range ips {
120 if ip4 == nil && ip.To4() != nil {
123 if ip6 == nil && ip.To16() != nil && ip.To4() == nil {
126 if ip4 != nil && ip6 != nil {
131 for i, lit4 := range literalAddrs4 {
132 if strings.Contains(lit4, "%") {
133 literalAddrs4[i] = fmt.Sprintf(lit4, ip4[0], ip4[1], ip4[2], ip4[3])
136 lits4 = literalAddrs4[:]
139 for i, lit6 := range literalAddrs6 {
140 if strings.Contains(lit6, "%") {
141 literalAddrs6[i] = fmt.Sprintf(lit6, ip6[0], ip6[1], ip6[2], ip6[3], ip6[4], ip6[5], ip6[6], ip6[7], ip6[8], ip6[9], ip6[10], ip6[11], ip6[12], ip6[13], ip6[14], ip6[15])
144 lits6 = literalAddrs6[:]
149 func fetchGoogle(dial func(string, string) (Conn, error), network, address string) error {
150 c, err := dial(network, address)
155 req := []byte("GET /robots.txt HTTP/1.0\r\nHost: www.google.com\r\n\r\n")
156 if _, err := c.Write(req); err != nil {
159 b := make([]byte, 1000)
160 n, err := io.ReadFull(c, b)
165 return fmt.Errorf("short read from %s:%s->%s", network, c.RemoteAddr(), c.LocalAddr())