22 lines
538 B
Go
22 lines
538 B
Go
package file
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import "github.com/miekg/dns"
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// ClosestEncloser returns the closest encloser for rr.
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func (z *Zone) ClosestEncloser(rr dns.RR) string {
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// tree/tree.go does not store a parent *Node pointer, so we can't
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// just follow up the tree. TODO(miek): fix.
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offset, end := dns.NextLabel(rr.Header().Name, 0)
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for !end {
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elem := z.Tree.Get(rr)
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if elem != nil {
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return elem.Name()
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}
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rr.Header().Name = rr.Header().Name[offset:]
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offset, end = dns.NextLabel(rr.Header().Name, offset)
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}
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return z.SOA.Header().Name
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}
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