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Merge: - rewrites: return NOERROR without A records instead of NXDOMAIN

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Close #1918

* commit 'ad4e85d8f50e1e905329f687c2748d28449d39c4':
  add test
  - rewrites: return NOERROR without A records instead of NXDOMAIN
This commit is contained in:
Simon Zolin 2020-07-24 16:26:52 +03:00
commit 4a8dcbeeed
2 changed files with 11 additions and 7 deletions
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5
dnsforward/dnsforward_test.go
View file

@ -670,6 +670,11 @@ func TestRewrite(t *testing.T) {
assert.True(t, ok)
assert.Equal(t, "1.2.3.4", a.A.String())
req = createTestMessageWithType("test.com.", dns.TypeAAAA)
reply, err = dns.Exchange(req, addr.String())
assert.Nil(t, err)
assert.Equal(t, 0, len(reply.Answer))
req = createTestMessageWithType("alias.test.com.", dns.TypeA)
reply, err = dns.Exchange(req, addr.String())
assert.Nil(t, err)

13
dnsforward/filter.go
View file

@ -54,8 +54,12 @@ func (s *Server) filterDNSRequest(ctx *dnsContext) (*dnsfilter.Result, error) {
// log.Tracef("Host %s is filtered, reason - '%s', matched rule: '%s'", host, res.Reason, res.Rule)
d.Res = s.genDNSFilterMessage(d, &res)
} else if (res.Reason == dnsfilter.ReasonRewrite || res.Reason == dnsfilter.RewriteEtcHosts) &&
len(res.IPList) != 0 {
} else if res.Reason == dnsfilter.ReasonRewrite && len(res.CanonName) != 0 && len(res.IPList) == 0 {
ctx.origQuestion = d.Req.Question[0]
// resolve canonical name, not the original host name
d.Req.Question[0].Name = dns.Fqdn(res.CanonName)
} else if res.Reason == dnsfilter.ReasonRewrite || res.Reason == dnsfilter.RewriteEtcHosts {
resp := s.makeResponse(req)
name := host
@ -78,11 +82,6 @@ func (s *Server) filterDNSRequest(ctx *dnsContext) (*dnsfilter.Result, error) {
d.Res = resp
} else if res.Reason == dnsfilter.ReasonRewrite && len(res.CanonName) != 0 {
ctx.origQuestion = d.Req.Question[0]
// resolve canonical name, not the original host name
d.Req.Question[0].Name = dns.Fqdn(res.CanonName)
} else if res.Reason == dnsfilter.RewriteEtcHosts && len(res.ReverseHost) != 0 {
resp := s.makeResponse(req)