d8714e64e4
* Rename middleware to plugin first pass; mostly used 'sed', few spots where I manually changed text. This still builds a coredns binary. * fmt error * Rename AddMiddleware to AddPlugin * Readd AddMiddleware to remain backwards compat
20 lines
519 B
Go
20 lines
519 B
Go
package dnsutil
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/miekg/dns"
|
|
)
|
|
|
|
// TrimZone removes the zone component from q. It returns the trimmed
|
|
// name or an error is zone is longer then qname. The trimmed name will be returned
|
|
// without a trailing dot.
|
|
func TrimZone(q string, z string) (string, error) {
|
|
zl := dns.CountLabel(z)
|
|
i, ok := dns.PrevLabel(q, zl)
|
|
if ok || i-1 < 0 {
|
|
return "", errors.New("trimzone: overshot qname: " + q + "for zone " + z)
|
|
}
|
|
// This includes the '.', remove on return
|
|
return q[:i-1], nil
|
|
}
|