225cdd1ca3
Test shouldTransfer by upping a testserver and sending the SOA query. Remove state from DefaultErrorHandler and just get it from the request. Add more logging to show what is going on. This also adds the infrastructure for future tests.
68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package file
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import (
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"fmt"
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"log"
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"github.com/miekg/coredns/middleware"
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"github.com/miekg/dns"
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)
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// isNotify checks if state is a notify message and if so, will *also* check if it
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// is from one of the configured masters. If not it will not be a valid notify
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// message. If the zone z is not a secondary zone the message will also be ignored.
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func (z *Zone) isNotify(state middleware.State) bool {
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if state.Req.Opcode != dns.OpcodeNotify {
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return false
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}
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if len(z.TransferFrom) == 0 {
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return false
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}
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remote := middleware.Addr(state.IP()).Normalize()
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for _, from := range z.TransferFrom {
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if from == remote {
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return true
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}
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}
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return false
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}
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// Notify will send notifies to all configured TransferTo IP addresses.
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func (z *Zone) Notify() {
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go notify(z.name, z.TransferTo)
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}
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// notify sends notifies to the configured remote servers. It will try up to three times
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// before giving up on a specific remote. We will sequentially loop through "to"
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// until they all have replied (or have 3 failed attempts).
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func notify(zone string, to []string) error {
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m := new(dns.Msg)
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m.SetNotify(zone)
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c := new(dns.Client)
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for _, t := range to {
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if t == "*" {
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continue
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}
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if err := notifyAddr(c, m, t); err != nil {
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log.Printf("[ERROR] " + err.Error())
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} else {
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log.Printf("[INFO] Sent notify for zone %s to %s", zone, t)
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}
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}
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return nil
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}
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func notifyAddr(c *dns.Client, m *dns.Msg, s string) error {
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for i := 0; i < 3; i++ {
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ret, err := middleware.Exchange(c, m, s)
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if err != nil {
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continue
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}
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if ret.Rcode == dns.RcodeSuccess || ret.Rcode == dns.RcodeNotImplemented {
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return nil
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}
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}
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return fmt.Errorf("Failed to send notify for zone '%s' to '%s'", m.Question[0].Name, s)
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}
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