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This commit is contained in:
Eugene Burkov 2024-08-16 13:12:36 +03:00
parent cdf970fcbf
commit f151f8c313
5 changed files with 54 additions and 52 deletions
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2
go.mod
View file

@ -3,7 +3,7 @@ module github.com/AdguardTeam/AdGuardHome
go 1.22.5
require (
github.com/AdguardTeam/dnsproxy v0.72.3-0.20240806061520-4cc9af6704ef
github.com/AdguardTeam/dnsproxy v0.72.4-0.20240816100403-7b95e9d45693
github.com/AdguardTeam/golibs v0.25.2
github.com/AdguardTeam/urlfilter v0.19.0
github.com/NYTimes/gziphandler v1.1.1

4
go.sum
View file

@ -1,5 +1,5 @@
github.com/AdguardTeam/dnsproxy v0.72.3-0.20240806061520-4cc9af6704ef h1:j6MtYGWnMOj5TdRFeLA/YmUuS4GKsatt1z3bmIJQtZ8=
github.com/AdguardTeam/dnsproxy v0.72.3-0.20240806061520-4cc9af6704ef/go.mod h1:DCHTuklaAuvCgtZzpoA0TrqCdOBZJQnKjgKxbC9/kQ8=
github.com/AdguardTeam/dnsproxy v0.72.4-0.20240816100403-7b95e9d45693 h1:C7zs6ZWYA2VwIORIdmJ868tXueR8ON/ezkGuObIbKIg=
github.com/AdguardTeam/dnsproxy v0.72.4-0.20240816100403-7b95e9d45693/go.mod h1:DCHTuklaAuvCgtZzpoA0TrqCdOBZJQnKjgKxbC9/kQ8=
github.com/AdguardTeam/golibs v0.25.2 h1:4+c9LjAIdd9trRk71hXghJ5OL/VRosBm+/0dKH+H39U=
github.com/AdguardTeam/golibs v0.25.2/go.mod h1:HaTyS2wCbxFudjht9N/+/Qf1b5cMad2BAYSwe7DPCXI=
github.com/AdguardTeam/urlfilter v0.19.0 h1:q7eH13+yNETlpD/VD3u5rLQOripcUdEktqZFy+KiQLk=

2
internal/dnsforward/config.go
View file

@ -427,8 +427,6 @@ func parseBogusNXDOMAIN(confBogusNXDOMAIN []string) (subnets []netip.Prefix, err
return subnets, nil
}
const defaultBlockedResponseTTL = 3600
// initDefaultSettings initializes default settings if nothing
// is configured
func (s *Server) initDefaultSettings() {

96
internal/dnsforward/msg.go
View file

@ -58,7 +58,7 @@ func (s *Server) genDNSFilterMessage(
return s.replyCompressed(req)
}
return s.newMsgNODATA(req)
return s.NewMsgNODATA(req)
}
switch res.Reason {
@ -344,51 +344,6 @@ func (s *Server) makeResponseREFUSED(req *dns.Msg) *dns.Msg {
return s.reply(req, dns.RcodeRefused)
}
// newMsgNODATA returns a properly initialized NODATA response.
//
// See https://www.rfc-editor.org/rfc/rfc2308#section-2.2.
func (s *Server) newMsgNODATA(req *dns.Msg) (resp *dns.Msg) {
resp = s.reply(req, dns.RcodeSuccess)
resp.Ns = s.genSOA(req)
return resp
}
func (s *Server) genSOA(request *dns.Msg) []dns.RR {
zone := ""
if len(request.Question) > 0 {
zone = request.Question[0].Name
}
soa := dns.SOA{
// values copied from verisign's nonexistent .com domain
// their exact values are not important in our use case because they are used for domain transfers between primary/secondary DNS servers
Refresh: 1800,
Retry: 900,
Expire: 604800,
Minttl: 86400,
// copied from AdGuard DNS
Ns: "fake-for-negative-caching.adguard.com.",
Serial: 100500,
// rest is request-specific
Hdr: dns.RR_Header{
Name: zone,
Rrtype: dns.TypeSOA,
Ttl: s.dnsFilter.BlockedResponseTTL(),
Class: dns.ClassINET,
},
Mbox: "hostmaster.", // zone will be appended later if it's not empty or "."
}
if soa.Hdr.Ttl == 0 {
soa.Hdr.Ttl = defaultBlockedResponseTTL
}
if len(zone) > 0 && zone[0] != '.' {
soa.Mbox += zone
}
return []dns.RR{&soa}
}
// type check
var _ proxy.MessageConstructor = (*Server)(nil)
@ -425,3 +380,52 @@ func (s *Server) NewMsgNOTIMPLEMENTED(req *dns.Msg) (resp *dns.Msg) {
return resp
}
// NewMsgNODATA implements the [proxy.MessageConstructor] interface for *Server.
func (s *Server) NewMsgNODATA(req *dns.Msg) (resp *dns.Msg) {
resp = s.reply(req, dns.RcodeSuccess)
resp.Ns = s.genSOA(req)
return resp
}
func (s *Server) genSOA(req *dns.Msg) []dns.RR {
zone := ""
if len(req.Question) > 0 {
zone = req.Question[0].Name
}
const defaultBlockedResponseTTL = 3600
soa := dns.SOA{
// Values copied from verisign's nonexistent.com domain.
//
// Their exact values are not important in our use case because they are
// used for domain transfers between primary/secondary DNS servers.
Refresh: 1800,
Retry: 900,
Expire: 604800,
Minttl: 86400,
// copied from AdGuard DNS
Ns: "fake-for-negative-caching.adguard.com.",
Serial: 100500,
// rest is request-specific
Hdr: dns.RR_Header{
Name: zone,
Rrtype: dns.TypeSOA,
Ttl: s.dnsFilter.BlockedResponseTTL(),
Class: dns.ClassINET,
},
// zone will be appended later if it's not ".".
Mbox: "hostmaster.",
}
if soa.Hdr.Ttl == 0 {
soa.Hdr.Ttl = defaultBlockedResponseTTL
}
if zone != "." {
soa.Mbox += zone
}
return []dns.RR{&soa}
}

2
internal/dnsforward/process.go
View file

@ -159,7 +159,7 @@ func (s *Server) processInitial(dctx *dnsContext) (rc resultCode) {
q := pctx.Req.Question[0]
qt := q.Qtype
if s.conf.AAAADisabled && qt == dns.TypeAAAA {
pctx.Res = s.newMsgNODATA(pctx.Req)
pctx.Res = s.NewMsgNODATA(pctx.Req)
return resultCodeFinish
}