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https://github.com/coredns/coredns.git
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f58f1e4285
Allow specifying a primary server and retrieve the zone's content. Add tests and an Expired bool to zone struct, to stop server zones that are expired. The zone is retrieved on Startup, no updates of changed content are done. We also don't respond to notifies yet.
41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
package file
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import (
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"fmt"
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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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// Notify will send notifies to all configured 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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// TODO(miek): error handling? Run this in a goroutine?
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for _, t := range to {
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notifyAddr(c, m, t)
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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 && ret.Rcode == dns.RcodeSuccess || ret.Rcode == dns.RcodeNotImplemented {
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return nil
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}
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// timeout? mean don't want it. should stop sending as well?
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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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