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package kubernetes
import (
"fmt"
"net"
"github.com/coredns/coredns/middleware/etcd/msg"
"github.com/coredns/coredns/middleware/pkg/dnsutil"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
)
func (k Kubernetes) records(state request.Request, exact bool) ([]msg.Service, error) {
r, err := k.parseRequest(state.Name(), state.QType())
if err != nil {
return nil, err
}
services, err := k.Records(r)
if err != nil {
return nil, err
}
services = msg.Group(services)
return services, nil
}
// PTR Record returns PTR records from kubernetes.
func (k Kubernetes) PTR(zone string, state request.Request) ([]dns.RR, error) {
reverseIP := dnsutil.ExtractAddressFromReverse(state.Name())
if reverseIP == "" {
return nil, fmt.Errorf("does not support reverse lookup for %s", state.QName())
}
records := make([]dns.RR, 1)
services, err := k.records(state, false)
if err != nil {
return nil, err
}
for _, serv := range services {
ip := net.ParseIP(serv.Host)
if reverseIP != serv.Host {
continue
}
switch {
case ip.To4() != nil:
records = append(records, serv.NewPTR(state.QName(), ip.To4().String()))
break
case ip.To4() == nil:
// nodata?
}
}
return records, nil
}
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