core: block CH queries earlier (#973)
block chaos queries, unless the chaos or proxy middleware is loaded. We respond with REFUSED. This removes the need for each middleware to do this class != ClassINET if-then. Also make config.Registry non-public.
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8 changed files with 18 additions and 29 deletions
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@ -1,8 +1,6 @@
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package kubernetes
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import (
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"errors"
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"github.com/coredns/coredns/middleware"
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"github.com/coredns/coredns/middleware/pkg/dnsutil"
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"github.com/coredns/coredns/request"
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@ -14,9 +12,6 @@ import (
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// ServeDNS implements the middleware.Handler interface.
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func (k Kubernetes) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
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state := request.Request{W: w, Req: r}
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if state.QClass() != dns.ClassINET {
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return dns.RcodeServerFailure, middleware.Error(k.Name(), errors.New("can only deal with ClassINET"))
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}
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m := new(dns.Msg)
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m.SetReply(r)
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