59ea40d0f2
Patch by Svante Signell.
Reviewed-on: https://go-review.googlesource.com/c/160823
From-SVN: r268460
362 lines
9.6 KiB
Go
362 lines
9.6 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd hurd linux netbsd openbsd solaris
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package net
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import (
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"os"
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"strings"
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"testing"
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)
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type nssHostTest struct {
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host string
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localhost string
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want hostLookupOrder
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}
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func nssStr(s string) *nssConf { return parseNSSConf(strings.NewReader(s)) }
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// represents a dnsConfig returned by parsing a nonexistent resolv.conf
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var defaultResolvConf = &dnsConfig{
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servers: defaultNS,
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ndots: 1,
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timeout: 5,
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attempts: 2,
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err: os.ErrNotExist,
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}
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func TestConfHostLookupOrder(t *testing.T) {
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tests := []struct {
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name string
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c *conf
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resolver *Resolver
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hostTests []nssHostTest
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}{
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{
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name: "force",
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c: &conf{
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forceCgoLookupHost: true,
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nss: nssStr("foo: bar"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"foo.local", "myhostname", hostLookupCgo},
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{"google.com", "myhostname", hostLookupCgo},
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},
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},
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{
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name: "netgo_dns_before_files",
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c: &conf{
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netGo: true,
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nss: nssStr("hosts: dns files"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupDNSFiles},
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},
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},
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{
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name: "netgo_fallback_on_cgo",
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c: &conf{
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netGo: true,
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nss: nssStr("hosts: dns files something_custom"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupFilesDNS},
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},
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},
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{
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name: "ubuntu_trusty_avahi",
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c: &conf{
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nss: nssStr("hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"foo.local", "myhostname", hostLookupCgo},
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{"foo.local.", "myhostname", hostLookupCgo},
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{"foo.LOCAL", "myhostname", hostLookupCgo},
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{"foo.LOCAL.", "myhostname", hostLookupCgo},
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{"google.com", "myhostname", hostLookupFilesDNS},
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},
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},
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{
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name: "freebsdlinux_no_resolv_conf",
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c: &conf{
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goos: "freebsd",
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nss: nssStr("foo: bar"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupFilesDNS}},
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},
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// On OpenBSD, no resolv.conf means no DNS.
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{
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name: "openbsd_no_resolv_conf",
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c: &conf{
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goos: "openbsd",
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupFiles}},
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},
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{
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name: "solaris_no_nsswitch",
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c: &conf{
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goos: "solaris",
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nss: &nssConf{err: os.ErrNotExist},
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupCgo}},
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},
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{
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name: "openbsd_lookup_bind_file",
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c: &conf{
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goos: "openbsd",
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resolv: &dnsConfig{lookup: []string{"bind", "file"}},
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},
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hostTests: []nssHostTest{
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{"google.com", "myhostname", hostLookupDNSFiles},
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{"foo.local", "myhostname", hostLookupDNSFiles},
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},
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},
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{
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name: "openbsd_lookup_file_bind",
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c: &conf{
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goos: "openbsd",
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resolv: &dnsConfig{lookup: []string{"file", "bind"}},
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupFilesDNS}},
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},
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{
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name: "openbsd_lookup_bind",
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c: &conf{
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goos: "openbsd",
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resolv: &dnsConfig{lookup: []string{"bind"}},
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupDNS}},
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},
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{
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name: "openbsd_lookup_file",
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c: &conf{
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goos: "openbsd",
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resolv: &dnsConfig{lookup: []string{"file"}},
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupFiles}},
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},
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{
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name: "openbsd_lookup_yp",
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c: &conf{
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goos: "openbsd",
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resolv: &dnsConfig{lookup: []string{"file", "bind", "yp"}},
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupCgo}},
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},
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{
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name: "openbsd_lookup_two",
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c: &conf{
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goos: "openbsd",
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resolv: &dnsConfig{lookup: []string{"file", "foo"}},
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupCgo}},
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},
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{
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name: "openbsd_lookup_empty",
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c: &conf{
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goos: "openbsd",
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resolv: &dnsConfig{lookup: nil},
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupDNSFiles}},
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},
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// glibc lacking an nsswitch.conf, per
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// https://www.gnu.org/software/libc/manual/html_node/Notes-on-NSS-Configuration-File.html
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{
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name: "linux_no_nsswitch.conf",
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c: &conf{
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goos: "linux",
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nss: &nssConf{err: os.ErrNotExist},
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupDNSFiles}},
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},
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{
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name: "files_mdns_dns",
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c: &conf{
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nss: nssStr("hosts: files mdns dns"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupFilesDNS},
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{"x.local", "myhostname", hostLookupCgo},
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},
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},
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{
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name: "dns_special_hostnames",
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c: &conf{
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nss: nssStr("hosts: dns"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupDNS},
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{"x\\.com", "myhostname", hostLookupCgo}, // punt on weird glibc escape
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{"foo.com%en0", "myhostname", hostLookupCgo}, // and IPv6 zones
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},
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},
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{
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name: "mdns_allow",
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c: &conf{
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nss: nssStr("hosts: files mdns dns"),
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resolv: defaultResolvConf,
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hasMDNSAllow: true,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupCgo},
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{"x.local", "myhostname", hostLookupCgo},
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},
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},
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{
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name: "files_dns",
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c: &conf{
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nss: nssStr("hosts: files dns"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupFilesDNS},
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{"x", "myhostname", hostLookupFilesDNS},
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{"x.local", "myhostname", hostLookupCgo},
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},
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},
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{
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name: "dns_files",
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c: &conf{
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nss: nssStr("hosts: dns files"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupDNSFiles},
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{"x", "myhostname", hostLookupDNSFiles},
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{"x.local", "myhostname", hostLookupCgo},
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},
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},
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{
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name: "something_custom",
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c: &conf{
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nss: nssStr("hosts: dns files something_custom"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupCgo},
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},
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},
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{
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name: "myhostname",
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c: &conf{
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nss: nssStr("hosts: files dns myhostname"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupFilesDNS},
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{"myhostname", "myhostname", hostLookupCgo},
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{"myHostname", "myhostname", hostLookupCgo},
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{"myhostname.dot", "myhostname.dot", hostLookupCgo},
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{"myHostname.dot", "myhostname.dot", hostLookupCgo},
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{"gateway", "myhostname", hostLookupCgo},
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{"Gateway", "myhostname", hostLookupCgo},
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{"localhost", "myhostname", hostLookupCgo},
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{"Localhost", "myhostname", hostLookupCgo},
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{"anything.localhost", "myhostname", hostLookupCgo},
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{"Anything.localhost", "myhostname", hostLookupCgo},
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{"localhost.localdomain", "myhostname", hostLookupCgo},
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{"Localhost.Localdomain", "myhostname", hostLookupCgo},
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{"anything.localhost.localdomain", "myhostname", hostLookupCgo},
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{"Anything.Localhost.Localdomain", "myhostname", hostLookupCgo},
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{"somehostname", "myhostname", hostLookupFilesDNS},
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{"", "myhostname", hostLookupFilesDNS}, // Issue 13623
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},
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},
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{
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name: "ubuntu14.04.02",
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c: &conf{
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nss: nssStr("hosts: files myhostname mdns4_minimal [NOTFOUND=return] dns mdns4"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupFilesDNS},
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{"somehostname", "myhostname", hostLookupFilesDNS},
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{"myhostname", "myhostname", hostLookupCgo},
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},
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},
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// Debian Squeeze is just "dns,files", but lists all
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// the default criteria for dns, but then has a
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// non-standard but redundant notfound=return for the
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// files.
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{
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name: "debian_squeeze",
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c: &conf{
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nss: nssStr("hosts: dns [success=return notfound=continue unavail=continue tryagain=continue] files [notfound=return]"),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupDNSFiles},
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{"somehostname", "myhostname", hostLookupDNSFiles},
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},
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},
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{
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name: "resolv.conf-unknown",
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c: &conf{
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nss: nssStr("foo: bar"),
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resolv: &dnsConfig{servers: defaultNS, ndots: 1, timeout: 5, attempts: 2, unknownOpt: true},
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},
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hostTests: []nssHostTest{{"google.com", "myhostname", hostLookupCgo}},
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},
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// Android should always use cgo.
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{
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name: "android",
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c: &conf{
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goos: "android",
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nss: nssStr(""),
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resolv: defaultResolvConf,
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},
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hostTests: []nssHostTest{
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{"x.com", "myhostname", hostLookupCgo},
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},
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},
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// Issue 24393: make sure "Resolver.PreferGo = true" acts like netgo.
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{
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name: "resolver-prefergo",
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resolver: &Resolver{PreferGo: true},
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c: &conf{
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goos: "darwin",
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forceCgoLookupHost: true, // always true for darwin
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resolv: defaultResolvConf,
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nss: nssStr(""),
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netCgo: true,
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},
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hostTests: []nssHostTest{
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{"localhost", "myhostname", hostLookupFilesDNS},
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},
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},
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}
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origGetHostname := getHostname
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defer func() { getHostname = origGetHostname }()
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for _, tt := range tests {
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for _, ht := range tt.hostTests {
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getHostname = func() (string, error) { return ht.localhost, nil }
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gotOrder := tt.c.hostLookupOrder(tt.resolver, ht.host)
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if gotOrder != ht.want {
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t.Errorf("%s: hostLookupOrder(%q) = %v; want %v", tt.name, ht.host, gotOrder, ht.want)
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}
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}
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}
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}
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func TestSystemConf(t *testing.T) {
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systemConf()
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}
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