d8714e64e4
* Rename middleware to plugin first pass; mostly used 'sed', few spots where I manually changed text. This still builds a coredns binary. * fmt error * Rename AddMiddleware to AddPlugin * Readd AddMiddleware to remain backwards compat
39 lines
1.2 KiB
Go
39 lines
1.2 KiB
Go
package rewrite
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import "github.com/miekg/dns"
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// ResponseReverter reverses the operations done on the question section of a packet.
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// This is need because the client will otherwise disregards the response, i.e.
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// dig will complain with ';; Question section mismatch: got miek.nl/HINFO/IN'
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type ResponseReverter struct {
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dns.ResponseWriter
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original dns.Question
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}
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// NewResponseReverter returns a pointer to a new ResponseReverter.
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func NewResponseReverter(w dns.ResponseWriter, r *dns.Msg) *ResponseReverter {
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return &ResponseReverter{
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ResponseWriter: w,
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original: r.Question[0],
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}
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}
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// WriteMsg records the status code and calls the
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// underlying ResponseWriter's WriteMsg method.
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func (r *ResponseReverter) WriteMsg(res *dns.Msg) error {
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res.Question[0] = r.original
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return r.ResponseWriter.WriteMsg(res)
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}
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// Write is a wrapper that records the size of the message that gets written.
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func (r *ResponseReverter) Write(buf []byte) (int, error) {
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n, err := r.ResponseWriter.Write(buf)
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return n, err
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}
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// Hijack implements dns.Hijacker. It simply wraps the underlying
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// ResponseWriter's Hijack method if there is one, or returns an error.
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func (r *ResponseReverter) Hijack() {
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r.ResponseWriter.Hijack()
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return
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}
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