20 lines
320 B
Go
20 lines
320 B
Go
package dns01
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import (
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"strings"
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"github.com/miekg/dns"
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)
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// Update FQDN with CNAME if any.
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func updateDomainWithCName(r *dns.Msg, fqdn string) string {
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for _, rr := range r.Answer {
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if cn, ok := rr.(*dns.CNAME); ok {
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if strings.EqualFold(cn.Hdr.Name, fqdn) {
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return cn.Target
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}
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}
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}
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return fqdn
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}
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