1 files changed, 107 insertions, 0 deletions
diff --git a/libgo/go/net/dialgoogle_test.go b/libgo/go/net/dialgoogle_test.go
new file mode 100644
index 000000000..a432800cf
--- /dev/null
+++ b/libgo/go/net/dialgoogle_test.go
@@ -0,0 +1,107 @@
+// 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 /intl/en/privacy/ 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()
+}
+
+var googleaddrs = []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",
+	"[2001:4860:0:2001::68]:80", // ipv6.google.com; removed if ipv6 flag not set
+}
+
+func TestDialGoogle(t *testing.T) {
+	// If no ipv6 tunnel, don't try the last address.
+	if !*ipv6 {
+		googleaddrs[len(googleaddrs)-1] = ""
+	}
+
+	// Insert an actual IP address for google.com
+	// into the table.
+
+	_, addrs, err := LookupHost("www.google.com")
+	if err != nil {
+		t.Fatalf("lookup www.google.com: %v", err)
+	}
+	if len(addrs) == 0 {
+		t.Fatalf("no addresses for www.google.com")
+	}
+	ip := ParseIP(addrs[0]).To4()
+
+	for i, s := range googleaddrs {
+		if strings.Contains(s, "%") {
+			googleaddrs[i] = fmt.Sprintf(s, ip[0], ip[1], ip[2], ip[3])
+		}
+	}
+
+	for i := 0; i < len(googleaddrs); i++ {
+		addr := googleaddrs[i]
+		if addr == "" {
+			continue
+		}
+		t.Logf("-- %s --", addr)
+		doDial(t, "tcp", addr)
+		if addr[0] != '[' {
+			doDial(t, "tcp4", addr)
+
+			if !preferIPv4 {
+				// make sure preferIPv4 flag works.
+				preferIPv4 = true
+				syscall.SocketDisableIPv6 = true
+				doDial(t, "tcp4", addr)
+				syscall.SocketDisableIPv6 = false
+				preferIPv4 = false
+			}
+		}
+
+		// Only run tcp6 if the kernel will take it.
+		if kernelSupportsIPv6() {
+			doDial(t, "tcp6", addr)
+		}
+	}
+}