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