diff options
| -rw-r--r-- | plugin/dns64/dns64.go | 3 | ||||
| -rw-r--r-- | plugin/dns64/dns64_test.go | 55 |
2 files changed, 58 insertions, 0 deletions
diff --git a/plugin/dns64/dns64.go b/plugin/dns64/dns64.go index 110bfeadd..9f426eb87 100644 --- a/plugin/dns64/dns64.go +++ b/plugin/dns64/dns64.go @@ -131,6 +131,9 @@ func (d *DNS64) Synthesize(origReq, origResponse, resp *dns.Msg) *dns.Msg { ret := dns.Msg{} ret.SetReply(origReq) + // persist truncated state of AAAA response + ret.Truncated = resp.Truncated + // 5.3.2: DNS64 MUST pass the additional section unchanged ret.Extra = resp.Extra ret.Ns = resp.Ns diff --git a/plugin/dns64/dns64_test.go b/plugin/dns64/dns64_test.go index de7ab65a8..5db83f163 100644 --- a/plugin/dns64/dns64_test.go +++ b/plugin/dns64/dns64_test.go @@ -434,6 +434,61 @@ func TestDNS64(t *testing.T) { }, }, }, + { + // no AAAA records, A record response truncated. + name: "truncated A response", + req: &dns.Msg{ + MsgHdr: dns.MsgHdr{ + Id: 42, + RecursionDesired: true, + Opcode: dns.OpcodeQuery, + }, + Question: []dns.Question{{"example.com.", dns.TypeAAAA, dns.ClassINET}}, + }, + initResp: &dns.Msg{ //success, no answers + MsgHdr: dns.MsgHdr{ + Id: 42, + Opcode: dns.OpcodeQuery, + RecursionDesired: true, + Rcode: dns.RcodeSuccess, + Response: true, + }, + Question: []dns.Question{{"example.com.", dns.TypeAAAA, dns.ClassINET}}, + Ns: []dns.RR{test.SOA("example.com. 70 IN SOA foo bar 1 1 1 1 1")}, + }, + aResp: &dns.Msg{ + MsgHdr: dns.MsgHdr{ + Id: 43, + Opcode: dns.OpcodeQuery, + RecursionDesired: true, + Truncated: true, + Rcode: dns.RcodeSuccess, + Response: true, + }, + Question: []dns.Question{{"example.com.", dns.TypeA, dns.ClassINET}}, + Answer: []dns.RR{ + test.A("example.com. 60 IN A 192.0.2.42"), + test.A("example.com. 5000 IN A 192.0.2.43"), + }, + }, + + resp: &dns.Msg{ + MsgHdr: dns.MsgHdr{ + Id: 42, + Opcode: dns.OpcodeQuery, + RecursionDesired: true, + Truncated: true, + Rcode: dns.RcodeSuccess, + Response: true, + }, + Question: []dns.Question{{"example.com.", dns.TypeAAAA, dns.ClassINET}}, + Answer: []dns.RR{ + test.AAAA("example.com. 60 IN AAAA 64:ff9b::192.0.2.42"), + // override RR ttl to SOA ttl, since it's lower + test.AAAA("example.com. 70 IN AAAA 64:ff9b::192.0.2.43"), + }, + }, + }, } _, pfx, _ := net.ParseCIDR("64:ff9b::/96") |