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* DNS rewrites: don't pass request to an upstream server if matched by Rewrite rule

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For example, if there's an A rewrite rule, but no AAAA rule,
 the response to AAAA request must be empty.
This commit is contained in:
Simon Zolin
2020-03-02 11:49:26 +03:00
parent 80df44b316
commit 140d5553e7
3 changed files with 19 additions and 22 deletions
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7
dnsforward/dnsforward.go
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@@ -791,11 +791,12 @@ func (s *Server) filterDNSRequest(ctx *dnsContext) (*dnsfilter.Result, error) {
}
for _, ip := range res.IPList {
if req.Question[0].Qtype == dns.TypeA {
a := s.genAAnswer(req, ip)
ip4 := ip.To4()
if req.Question[0].Qtype == dns.TypeA && ip4 != nil {
a := s.genAAnswer(req, ip4)
a.Hdr.Name = dns.Fqdn(name)
resp.Answer = append(resp.Answer, a)
} else if req.Question[0].Qtype == dns.TypeAAAA {
} else if req.Question[0].Qtype == dns.TypeAAAA && ip4 == nil {
a := s.genAAAAAnswer(req, ip)
a.Hdr.Name = dns.Fqdn(name)
resp.Answer = append(resp.Answer, a)