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4a0ba7aa17
If the machine's network configuration files (resolv.conf, nsswitch.conf) don't have any unsupported options, prefer Go's DNS resolver, which doesn't have the cgo & thread over. It means users can have more than 500 DNS requests outstanding (our current limit for cgo lookups) and not have one blocked thread per outstanding request. Discussed in thread https://groups.google.com/d/msg/golang-dev/2ZUi792oztM/Q0rg_DkF5HMJ Change-Id: I3f685d70aff6b47bec30b63e9fba674b20507f95 Reviewed-on: https://go-review.googlesource.com/8945 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
170 lines
3.3 KiB
Go
170 lines
3.3 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 linux netbsd openbsd solaris
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package net
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import (
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"reflect"
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"strings"
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"testing"
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)
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const ubuntuTrustyAvahi = `# /etc/nsswitch.conf
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#
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# Example configuration of GNU Name Service Switch functionality.
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# If you have the libc-doc-reference' and nfo' packages installed, try:
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# nfo libc "Name Service Switch"' for information about this file.
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passwd: compat
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group: compat
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shadow: compat
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hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
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networks: files
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protocols: db files
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services: db files
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ethers: db files
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rpc: db files
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netgroup: nis
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`
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func TestParseNSSConf(t *testing.T) {
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tests := []struct {
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name string
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in string
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want *nssConf
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}{
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{
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name: "no_newline",
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in: "foo: a b",
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want: &nssConf{
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sources: map[string][]nssSource{
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"foo": {{source: "a"}, {source: "b"}},
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},
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},
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},
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{
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name: "newline",
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in: "foo: a b\n",
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want: &nssConf{
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sources: map[string][]nssSource{
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"foo": {{source: "a"}, {source: "b"}},
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},
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},
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},
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{
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name: "whitespace",
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in: " foo:a b \n",
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want: &nssConf{
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sources: map[string][]nssSource{
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"foo": {{source: "a"}, {source: "b"}},
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},
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},
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},
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{
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name: "comment1",
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in: " foo:a b#c\n",
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want: &nssConf{
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sources: map[string][]nssSource{
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"foo": {{source: "a"}, {source: "b"}},
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},
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},
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},
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{
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name: "comment2",
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in: " foo:a b #c \n",
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want: &nssConf{
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sources: map[string][]nssSource{
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"foo": {{source: "a"}, {source: "b"}},
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},
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},
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},
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{
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name: "crit",
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in: " foo:a b [!a=b X=Y ] c#d \n",
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want: &nssConf{
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sources: map[string][]nssSource{
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"foo": {
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{source: "a"},
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{
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source: "b",
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criteria: []nssCriterion{
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{
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negate: true,
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status: "a",
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action: "b",
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},
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{
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status: "x",
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action: "y",
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},
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},
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},
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{source: "c"},
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},
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},
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},
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},
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// Ubuntu Trusty w/ avahi-daemon, libavahi-* etc installed.
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{
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name: "ubuntu_trusty_avahi",
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in: ubuntuTrustyAvahi,
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want: &nssConf{
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sources: map[string][]nssSource{
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"passwd": {{source: "compat"}},
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"group": {{source: "compat"}},
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"shadow": {{source: "compat"}},
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"hosts": {
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{source: "files"},
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{
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source: "mdns4_minimal",
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criteria: []nssCriterion{
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{
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negate: false,
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status: "notfound",
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action: "return",
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},
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},
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},
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{source: "dns"},
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{source: "mdns4"},
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},
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"networks": {{source: "files"}},
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"protocols": {
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{source: "db"},
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{source: "files"},
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},
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"services": {
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{source: "db"},
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{source: "files"},
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},
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"ethers": {
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{source: "db"},
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{source: "files"},
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},
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"rpc": {
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{source: "db"},
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{source: "files"},
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},
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"netgroup": {
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{source: "nis"},
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},
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},
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},
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},
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}
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for _, tt := range tests {
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gotConf := parseNSSConf(strings.NewReader(tt.in))
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if !reflect.DeepEqual(gotConf, tt.want) {
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t.Errorf("%s: mismatch\n got %#v\nwant %#v", tt.name, gotConf, tt.want)
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}
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}
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}
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