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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>
81 lines
1.7 KiB
Go
81 lines
1.7 KiB
Go
// Copyright 2013 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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"testing"
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)
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var dnsReadConfigTests = []struct {
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name string
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want *dnsConfig
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}{
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{
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name: "testdata/resolv.conf",
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want: &dnsConfig{
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servers: []string{"8.8.8.8", "2001:4860:4860::8888", "fe80::1%lo0"},
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search: []string{"localdomain"},
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ndots: 5,
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timeout: 10,
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attempts: 3,
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rotate: true,
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unknownOpt: true, // the "options attempts 3" line
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},
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},
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{
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name: "testdata/domain-resolv.conf",
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want: &dnsConfig{
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servers: []string{"8.8.8.8"},
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search: []string{"localdomain"},
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ndots: 1,
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timeout: 5,
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attempts: 2,
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},
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},
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{
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name: "testdata/search-resolv.conf",
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want: &dnsConfig{
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servers: []string{"8.8.8.8"},
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search: []string{"test", "invalid"},
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ndots: 1,
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timeout: 5,
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attempts: 2,
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},
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},
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{
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name: "testdata/empty-resolv.conf",
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want: &dnsConfig{
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ndots: 1,
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timeout: 5,
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attempts: 2,
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},
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},
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{
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name: "testdata/openbsd-resolv.conf",
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want: &dnsConfig{
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ndots: 1,
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timeout: 5,
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attempts: 2,
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lookup: []string{"file", "bind"},
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servers: []string{"169.254.169.254", "10.240.0.1"},
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search: []string{"c.symbolic-datum-552.internal."},
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},
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},
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}
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func TestDNSReadConfig(t *testing.T) {
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for _, tt := range dnsReadConfigTests {
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conf, err := dnsReadConfig(tt.name)
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if err != nil {
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t.Fatal(err)
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}
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if !reflect.DeepEqual(conf, tt.want) {
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t.Errorf("%s:\n got: %+v\nwant: %+v", tt.name, conf, tt.want)
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}
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}
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}
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