package dns import ( "bytes" "testing" ) func TestDynamicUpdateParsing(t *testing.T) { prefix := "example.com. IN " for _, typ := range TypeToString { if typ == "OPT" || typ == "AXFR" || typ == "IXFR" || typ == "ANY" || typ == "TKEY" || typ == "TSIG" || typ == "ISDN" || typ == "UNSPEC" || typ == "NULL" || typ == "ATMA" || typ == "Reserved" || typ == "None" || typ == "NXT" || typ == "MAILB" || typ == "MAILA" { continue } r, err := NewRR(prefix + typ) if err != nil { t.Errorf("failure to parse: %s %s: %v", prefix, typ, err) } else { t.Logf("parsed: %s", r.String()) } } } func TestDynamicUpdateUnpack(t *testing.T) { // From https://github.com/miekg/dns/issues/150#issuecomment-62296803 // It should be an update message for the zone "example.", // deleting the A RRset "example." and then adding an A record at "example.". // class ANY, TYPE A buf := []byte{171, 68, 40, 0, 0, 1, 0, 0, 0, 2, 0, 0, 7, 101, 120, 97, 109, 112, 108, 101, 0, 0, 6, 0, 1, 192, 12, 0, 1, 0, 255, 0, 0, 0, 0, 0, 0, 192, 12, 0, 1, 0, 1, 0, 0, 0, 0, 0, 4, 127, 0, 0, 1} msg := new(Msg) err := msg.Unpack(buf) if err != nil { t.Errorf("failed to unpack: %v\n%s", err, msg.String()) } } func TestDynamicUpdateZeroRdataUnpack(t *testing.T) { m := new(Msg) rr := &RR_Header{Name: ".", Rrtype: 0, Class: 1, Ttl: ^uint32(0), Rdlength: 0} m.Answer = []RR{rr, rr, rr, rr, rr} m.Ns = m.Answer for n, s := range TypeToString { rr.Rrtype = n bytes, err := m.Pack() if err != nil { t.Errorf("failed to pack %s: %v", s, err) continue } if err := new(Msg).Unpack(bytes); err != nil { t.Errorf("failed to unpack %s: %v", s, err) } } } func TestRemoveRRset(t *testing.T) { // Should add a zero data RR in Class ANY with a TTL of 0 // for each set mentioned in the RRs provided to it. rr, err := NewRR(". 100 IN A 127.0.0.1") if err != nil { t.Fatalf("error constructing RR: %v", err) } m := new(Msg) m.Ns = []RR{&RR_Header{Name: ".", Rrtype: TypeA, Class: ClassANY, Ttl: 0, Rdlength: 0}} expectstr := m.String() expect, err := m.Pack() if err != nil { t.Fatalf("error packing expected msg: %v", err) } m.Ns = nil m.RemoveRRset([]RR{rr}) actual, err := m.Pack() if err != nil { t.Fatalf("error packing actual msg: %v", err) } if !bytes.Equal(actual, expect) { tmp := new(Msg) if err := tmp.Unpack(actual); err != nil { t.Fatalf("error unpacking actual msg: %v\nexpected: %v\ngot: %v\n", err, expect, actual) } t.Errorf("expected msg:\n%s", expectstr) t.Errorf("actual msg:\n%v", tmp) } } func TestPreReqAndRemovals(t *testing.T) { // Build a list of multiple prereqs and then somes removes followed by an insert. // We should be able to add multiple prereqs and updates. m := new(Msg) m.SetUpdate("example.org.") m.Id = 1234 // Use a full set of RRs each time, so we are sure the rdata is stripped. rrName1, _ := NewRR("name_used. 3600 IN A 127.0.0.1") rrName2, _ := NewRR("name_not_used. 3600 IN A 127.0.0.1") rrRemove1, _ := NewRR("remove1. 3600 IN A 127.0.0.1") rrRemove2, _ := NewRR("remove2. 3600 IN A 127.0.0.1") rrRemove3, _ := NewRR("remove3. 3600 IN A 127.0.0.1") rrInsert, _ := NewRR("insert. 3600 IN A 127.0.0.1") rrRrset1, _ := NewRR("rrset_used1. 3600 IN A 127.0.0.1") rrRrset2, _ := NewRR("rrset_used2. 3600 IN A 127.0.0.1") rrRrset3, _ := NewRR("rrset_not_used. 3600 IN A 127.0.0.1") // Handle the prereqs. m.NameUsed([]RR{rrName1}) m.NameNotUsed([]RR{rrName2}) m.RRsetUsed([]RR{rrRrset1}) m.Used([]RR{rrRrset2}) m.RRsetNotUsed([]RR{rrRrset3}) // and now the updates. m.RemoveName([]RR{rrRemove1}) m.RemoveRRset([]RR{rrRemove2}) m.Remove([]RR{rrRemove3}) m.Insert([]RR{rrInsert}) // This test function isn't a Example function because we print these RR with tabs at the // end and the Example function trim these, thus they never match. // TODO(miek): don't print these tabs and make this into an Example function. expect := `;; opcode: UPDATE, status: NOERROR, id: 1234 ;; flags:; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 0 ;; QUESTION SECTION: ;example.org. IN SOA ;; ANSWER SECTION: name_used. 0 ANY ANY name_not_used. 0 NONE ANY rrset_used1. 0 ANY A rrset_used2. 3600 IN A 127.0.0.1 rrset_not_used. 0 NONE A ;; AUTHORITY SECTION: remove1. 0 ANY ANY remove2. 0 ANY A remove3. 0 NONE A 127.0.0.1 insert. 3600 IN A 127.0.0.1 ` if m.String() != expect { t.Errorf("expected msg:\n%s", expect) t.Errorf("actual msg:\n%v", m.String()) } }