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* dnsfilter: change DNS answer for host rules

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When matched by a host rule, return only the IP address specified in rule.
Respond with an empty IP list to another request type.

:: host -- return nothing to A, return :: to AAAA request
0.0.0.0 host -- return 0.0.0.0 to A, return nothing to AAAA request
This commit is contained in:
Simon Zolin
2020-01-09 19:31:14 +03:00
parent 94d86eee10
commit 8d2a9ce923
3 changed files with 19 additions and 21 deletions
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3
dnsforward/dnsforward.go
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@@ -788,7 +788,8 @@ func (s *Server) genAAAAAnswer(req *dns.Msg, ip net.IP) *dns.AAAA {
func (s *Server) genResponseWithIP(req *dns.Msg, ip net.IP) *dns.Msg {
if req.Question[0].Qtype == dns.TypeA && ip.To4() != nil {
return s.genARecord(req, ip.To4())
} else if req.Question[0].Qtype == dns.TypeAAAA && ip.To4() == nil {
} else if req.Question[0].Qtype == dns.TypeAAAA &&
len(ip) == net.IPv6len && ip.To4() == nil {
return s.genAAAARecord(req, ip)
}