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d998aa6c25
* plugin/erratic: add axfr support Add support for axfr. This to fix and test long standing axfr issues that are hard to test if we don't support it directly in coredns. The most intriguing feature is withholding the last SOA from a response so the client needs to wait; drop (no reply) and delay is also supported. All TTLs are set to zero. Add simple tests that checks if first record is a SOA. Signed-off-by: Miek Gieben <miek@miek.nl> * more test coverage Signed-off-by: Miek Gieben <miek@miek.nl>
53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
package erratic
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import (
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"strings"
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"github.com/coredns/coredns/plugin/test"
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"github.com/coredns/coredns/request"
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"github.com/miekg/dns"
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)
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// allRecords returns a small zone file. The first RR must be a SOA.
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func allRecords(name string) []dns.RR {
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var rrs = []dns.RR{
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test.SOA("xx. 0 IN SOA sns.dns.icann.org. noc.dns.icann.org. 2018050825 7200 3600 1209600 3600"),
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test.NS("xx. 0 IN NS b.xx."),
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test.NS("xx. 0 IN NS a.xx."),
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test.AAAA("a.xx. 0 IN AAAA 2001:bd8::53"),
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test.AAAA("b.xx. 0 IN AAAA 2001:500::54"),
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}
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for _, r := range rrs {
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r.Header().Name = strings.Replace(r.Header().Name, "xx.", name, 1)
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if n, ok := r.(*dns.NS); ok {
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n.Ns = strings.Replace(n.Ns, "xx.", name, 1)
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}
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}
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return rrs
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}
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func xfr(state request.Request, truncate bool) {
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rrs := allRecords(state.QName())
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ch := make(chan *dns.Envelope)
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tr := new(dns.Transfer)
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go func() {
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// So the rrs we have don't have a closing SOA, only add that when truncate is false,
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// so we send an incomplete AXFR.
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if !truncate {
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rrs = append(rrs, rrs[0])
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}
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ch <- &dns.Envelope{RR: rrs}
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close(ch)
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}()
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tr.Out(state.W, state.Req, ch)
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state.W.Hijack()
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return
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}
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