Imported Upstream version 1.4upstream/1.4

1 files changed, 209 insertions, 0 deletions

diff --git a/src/net/dialgoogle_test.go b/src/net/dialgoogle_test.go
new file mode 100644
index 000000000..df5895afa
--- /dev/null
+++ b/src/net/dialgoogle_test.go
@@ -0,0 +1,209 @@
+// 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 testIPv6 = flag.Bool("ipv6", false, "assume ipv6 tunnel is present")
+
+func TestResolveGoogle(t *testing.T) {
+	if testing.Short() || !*testExternal {
+		t.Skip("skipping test to avoid external network")
+	}
+
+	for _, network := range []string{"tcp", "tcp4", "tcp6"} {
+		addr, err := ResolveTCPAddr(network, "www.google.com:http")
+		if err != nil {
+			if (network == "tcp" || network == "tcp4") && !supportsIPv4 {
+				t.Logf("ipv4 is not supported: %v", err)
+			} else if network == "tcp6" && !supportsIPv6 {
+				t.Logf("ipv6 is not supported: %v", err)
+			} else {
+				t.Errorf("ResolveTCPAddr failed: %v", err)
+			}
+			continue
+		}
+		if (network == "tcp" || network == "tcp4") && addr.IP.To4() == nil {
+			t.Errorf("got %v; expected an IPv4 address on %v", addr, network)
+		} else if network == "tcp6" && (addr.IP.To16() == nil || addr.IP.To4() != nil) {
+			t.Errorf("got %v; expected an IPv6 address on %v", addr, network)
+		}
+	}
+}
+
+func TestDialGoogle(t *testing.T) {
+	if testing.Short() || !*testExternal {
+		t.Skip("skipping test to avoid external network")
+	}
+
+	d := &Dialer{DualStack: true}
+	for _, network := range []string{"tcp", "tcp4", "tcp6"} {
+		if network == "tcp" && !supportsIPv4 && !supportsIPv6 {
+			t.Logf("skipping test; both ipv4 and ipv6 are not supported")
+			continue
+		} else if network == "tcp4" && !supportsIPv4 {
+			t.Logf("skipping test; ipv4 is not supported")
+			continue
+		} else if network == "tcp6" && !supportsIPv6 {
+			t.Logf("skipping test; ipv6 is not supported")
+			continue
+		} else if network == "tcp6" && !*testIPv6 {
+			t.Logf("test disabled; use -ipv6 to enable")
+			continue
+		}
+		if c, err := d.Dial(network, "www.google.com:http"); err != nil {
+			t.Errorf("Dial failed: %v", err)
+		} else {
+			c.Close()
+		}
+	}
+}
+
+// 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()
+}
+
+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::ffff:%d.%d.%d.%d]:80",
+}
+
+func TestDialGoogleIPv4(t *testing.T) {
+	if testing.Short() || !*testExternal {
+		t.Skip("skipping test to avoid external network")
+	}
+
+	// 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() || !*testExternal {
+		t.Skip("skipping test to avoid external network")
+	}
+	// Only run tcp6 if the kernel will take it.
+	if !supportsIPv6 {
+		t.Skip("skipping test; ipv6 is not supported")
+	}
+	if !*testIPv6 {
+		t.Skip("test disabled; use -ipv6 to enable")
+	}
+
+	// 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)
+	}
+}