59 lines
1023 B
Go
59 lines
1023 B
Go
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package dnsmasq
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import (
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"cryptic-net/bootstrap"
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"fmt"
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"os"
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"text/template"
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)
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// ConfData describes all the data needed to populate a dnsmasq.conf file.
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type ConfData struct {
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Resolvers []string
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Domain string
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IP string
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Hosts []bootstrap.Host
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}
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var confTpl = template.Must(template.New("").Parse(`
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port=53
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bind-interfaces
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listen-address={{ .IP }}
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no-resolv
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no-hosts
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user=
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group=
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{{- range $host := .Hosts }}
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address=/{{ $host.Name }}.hosts.{{ .Domain }}/{{ $host.Nebula.IP }}
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{{ end -}}
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{{- range .Resolvers }}
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server={{ . }}
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{{ end -}}
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`))
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// WriteConfFile renders a dnsmasq.conf using the given data to a new
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// file at the given path.
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func WriteConfFile(path string, data ConfData) error {
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file, err := os.OpenFile(
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path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640,
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)
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if err != nil {
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return fmt.Errorf("creating file: %w", err)
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}
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defer file.Close()
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if err := confTpl.Execute(file, data); err != nil {
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return fmt.Errorf("rendering template to file: %w", err)
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}
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return nil
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}
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