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package file
import (
"net"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
)
// isNotify checks if state is a notify message and if so, will *also* check if it
// is from one of the configured masters. If not it will not be a valid notify
// message. If the zone z is not a secondary zone the message will also be ignored.
func (z *Zone) isNotify(state request.Request) bool {
if state.Req.Opcode != dns.OpcodeNotify {
return false
}
if len(z.TransferFrom) == 0 {
return false
}
// If remote IP matches we accept.
remote := state.IP()
for _, f := range z.TransferFrom {
from, _, err := net.SplitHostPort(f)
if err != nil {
continue
}
if from == remote {
return true
}
}
return false
}
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