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// 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.
// TODO It would be nice to use a mock DNS server, to eliminate
// external dependencies.
package net
import (
"flag"
"strings"
"testing"
)
var testExternal = flag.Bool("external", true, "allow use of external networks during long test")
var lookupGoogleSRVTests = []struct {
service, proto, name string
cname, target string
}{
{
"xmpp-server", "tcp", "google.com",
".google.com", ".google.com",
},
{
"", "", "_xmpp-server._tcp.google.com", // non-standard back door
".google.com", ".google.com",
},
}
func TestLookupGoogleSRV(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
for _, tt := range lookupGoogleSRVTests {
cname, srvs, err := LookupSRV(tt.service, tt.proto, tt.name)
if err != nil {
t.Fatal(err)
}
if len(srvs) == 0 {
t.Error("got no record")
}
if !strings.Contains(cname, tt.cname) {
t.Errorf("got %q; want %q", cname, tt.cname)
}
for _, srv := range srvs {
if !strings.Contains(srv.Target, tt.target) {
t.Errorf("got %v; want a record containing %q", srv, tt.target)
}
}
}
}
func TestLookupGmailMX(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
mxs, err := LookupMX("gmail.com")
if err != nil {
t.Fatal(err)
}
if len(mxs) == 0 {
t.Error("got no record")
}
for _, mx := range mxs {
if !strings.Contains(mx.Host, ".google.com") {
t.Errorf("got %v; want a record containing .google.com.", mx)
}
}
}
func TestLookupGmailNS(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
nss, err := LookupNS("gmail.com")
if err != nil {
t.Fatal(err)
}
if len(nss) == 0 {
t.Error("got no record")
}
for _, ns := range nss {
if !strings.Contains(ns.Host, ".google.com") {
t.Errorf("got %v; want a record containing .google.com.", ns)
}
}
}
func TestLookupGmailTXT(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
txts, err := LookupTXT("gmail.com")
if err != nil {
t.Fatal(err)
}
if len(txts) == 0 {
t.Error("got no record")
}
for _, txt := range txts {
if !strings.Contains(txt, "spf") {
t.Errorf("got %q; want a spf record", txt)
}
}
}
var lookupGooglePublicDNSAddrs = []struct {
addr string
name string
}{
{"8.8.8.8", ".google.com."},
{"8.8.4.4", ".google.com."},
{"2001:4860:4860::8888", ".google.com."},
{"2001:4860:4860::8844", ".google.com."},
}
func TestLookupGooglePublicDNSAddr(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
for _, tt := range lookupGooglePublicDNSAddrs {
names, err := LookupAddr(tt.addr)
if err != nil {
t.Fatal(err)
}
if len(names) == 0 {
t.Error("got no record")
}
for _, name := range names {
if !strings.HasSuffix(name, tt.name) {
t.Errorf("got %q; want a record containing %q", name, tt.name)
}
}
}
}
func TestLookupIANACNAME(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
cname, err := LookupCNAME("www.iana.org")
if err != nil {
t.Fatal(err)
}
if !strings.HasSuffix(cname, ".icann.org.") {
t.Errorf("got %q; want a record containing .icann.org.", cname)
}
}
func TestLookupGoogleHost(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
addrs, err := LookupHost("google.com")
if err != nil {
t.Fatal(err)
}
if len(addrs) == 0 {
t.Error("got no record")
}
for _, addr := range addrs {
if ParseIP(addr) == nil {
t.Errorf("got %q; want a literal ip address", addr)
}
}
}
func TestLookupGoogleIP(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("skipping test to avoid external network")
}
ips, err := LookupIP("google.com")
if err != nil {
t.Fatal(err)
}
if len(ips) == 0 {
t.Error("got no record")
}
for _, ip := range ips {
if ip.To4() == nil && ip.To16() == nil {
t.Errorf("got %v; want an ip address", ip)
}
}
}
var revAddrTests = []struct {
Addr string
Reverse string
ErrPrefix string
}{
{"1.2.3.4", "4.3.2.1.in-addr.arpa.", ""},
{"245.110.36.114", "114.36.110.245.in-addr.arpa.", ""},
{"::ffff:12.34.56.78", "78.56.34.12.in-addr.arpa.", ""},
{"::1", "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.", ""},
{"1::", "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.ip6.arpa.", ""},
{"1234:567::89a:bcde", "e.d.c.b.a.9.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.6.5.0.4.3.2.1.ip6.arpa.", ""},
{"1234:567:fefe:bcbc:adad:9e4a:89a:bcde", "e.d.c.b.a.9.8.0.a.4.e.9.d.a.d.a.c.b.c.b.e.f.e.f.7.6.5.0.4.3.2.1.ip6.arpa.", ""},
{"1.2.3", "", "unrecognized address"},
{"1.2.3.4.5", "", "unrecognized address"},
{"1234:567:bcbca::89a:bcde", "", "unrecognized address"},
{"1234:567::bcbc:adad::89a:bcde", "", "unrecognized address"},
}
func TestReverseAddress(t *testing.T) {
for i, tt := range revAddrTests {
a, err := reverseaddr(tt.Addr)
if len(tt.ErrPrefix) > 0 && err == nil {
t.Errorf("#%d: expected %q, got <nil> (error)", i, tt.ErrPrefix)
continue
}
if len(tt.ErrPrefix) == 0 && err != nil {
t.Errorf("#%d: expected <nil>, got %q (error)", i, err)
}
if err != nil && err.(*DNSError).Err != tt.ErrPrefix {
t.Errorf("#%d: expected %q, got %q (mismatched error)", i, tt.ErrPrefix, err.(*DNSError).Err)
}
if a != tt.Reverse {
t.Errorf("#%d: expected %q, got %q (reverse address)", i, tt.Reverse, a)
}
}
}
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