80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
// Copyright 2016 CNI authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"os"
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. "github.com/onsi/ginkgo/v2"
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. "github.com/onsi/gomega"
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"github.com/containernetworking/cni/pkg/types"
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)
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var _ = Describe("parsing resolv.conf", func() {
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It("parses a simple resolv.conf file", func() {
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contents := `
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nameserver 192.0.2.0
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nameserver 192.0.2.1
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`
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dns, err := parse(contents)
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Expect(err).NotTo(HaveOccurred())
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Expect(*dns).Should(Equal(types.DNS{Nameservers: []string{"192.0.2.0", "192.0.2.1"}}))
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})
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It("ignores comments", func() {
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dns, err := parse(`
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nameserver 192.0.2.0
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;nameserver 192.0.2.1
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`)
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Expect(err).NotTo(HaveOccurred())
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Expect(*dns).Should(Equal(types.DNS{Nameservers: []string{"192.0.2.0"}}))
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})
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It("parses all fields", func() {
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dns, err := parse(`
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nameserver 192.0.2.0
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nameserver 192.0.2.2
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domain example.com
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;nameserver comment
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#nameserver comment
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search example.net example.org
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search example.gov
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options one two three
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options four
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`)
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Expect(err).NotTo(HaveOccurred())
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Expect(*dns).Should(Equal(types.DNS{
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Nameservers: []string{"192.0.2.0", "192.0.2.2"},
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Domain: "example.com",
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Search: []string{"example.net", "example.org", "example.gov"},
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Options: []string{"one", "two", "three", "four"},
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}))
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})
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})
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func parse(contents string) (*types.DNS, error) {
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f, err := os.CreateTemp("", "host_local_resolv")
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if err != nil {
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return nil, err
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}
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defer f.Close()
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defer os.Remove(f.Name())
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if _, err := f.WriteString(contents); err != nil {
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return nil, err
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}
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return parseResolvConf(f.Name())
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}
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