[3362] d2::NameRemoveTransaction now checks for NXRRSET

Changed NameRemoveTransaction to test for NXRRSET not NXDOMAIN.  Since
the remove prequisites are RRSet tests, if the RRSets do no exist the
DNS server will return NXRRSET. NameRemoveTransaction now correctly
checks for this and treats it as success.

src/bin/d2/nc_remove.cc

@@ -216,7 +216,7 @@ NameRemoveTransaction::removingFwdAddrsHandler() {
             // We successfully received a response packet from the server.
             const dns::Rcode& rcode = getDnsUpdateResponse()->getRcode();
             if ((rcode == dns::Rcode::NOERROR()) ||
-                (rcode == dns::Rcode::NXDOMAIN())) {
+                (rcode == dns::Rcode::NXRRSET())) {
                 // We were able to remove it or it wasn't there, now we
                 // need to remove any other RRs for this FQDN.
                 transition(REMOVING_FWD_RRS_ST, UPDATE_OK_EVT);
@@ -319,12 +319,11 @@ NameRemoveTransaction::removingFwdRRsHandler() {
         case DNSClient::SUCCESS: {
             // We successfully received a response packet from the server.
             const dns::Rcode& rcode = getDnsUpdateResponse()->getRcode();
-            // @todo Not sure if NXDOMAIN is ok here, but I think so.
-            // A Rcode of NXDOMAIN would mean there are no RRs for the FQDN,
+            // A Rcode of NXRRSET means there are no RRs for the FQDN,
             // which is fine.  We were asked to delete them, they are not there
             // so all is well.
             if ((rcode == dns::Rcode::NOERROR()) ||
-                (rcode == dns::Rcode::NXDOMAIN())) {
+                (rcode == dns::Rcode::NXRRSET())) {
                 // We were able to remove the forward mapping. Mark it as done.
                 setForwardChangeCompleted(true);
 
@@ -473,9 +472,9 @@ NameRemoveTransaction::removingRevPtrsHandler() {
             // We successfully received a response packet from the server.
             const dns::Rcode& rcode = getDnsUpdateResponse()->getRcode();
             if ((rcode == dns::Rcode::NOERROR()) ||
-                (rcode == dns::Rcode::NXDOMAIN())) {
+                (rcode == dns::Rcode::NXRRSET())) {
                 // We were able to update the reverse mapping. Mark it as done.
-                // @todo For now we are also treating NXDOMAIN as success.
+                // We are also treating NXRRSET as success.
                 setReverseChangeCompleted(true);
                 transition(PROCESS_TRANS_OK_ST, UPDATE_OK_EVT);
             } else {

src/bin/d2/tests/nc_remove_unittests.cc

@@ -603,8 +603,8 @@ TEST_F(NameRemoveTransactionTest, removingFwdAddrsHandler_FqdnNotInUse) {
     // Run removingFwdAddrsHandler to construct and send the request.
     EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());
 
-    // Simulate receiving a FQDN not in use response.
-    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXDOMAIN());
+    // Simulate receiving a RRSET does not exist.
+    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXRRSET());
 
     // Run removingFwdAddrsHandler again to process the response.
     EXPECT_NO_THROW(name_remove->removingFwdAddrsHandler());
@@ -963,8 +963,8 @@ TEST_F(NameRemoveTransactionTest, removingFwdRRsHandler_FqdnNotInUse) {
     // Run removingFwdRRsHandler to construct and send the request.
     EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());
 
-    // Simulate receiving a FQDN not in use response.
-    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXDOMAIN());
+    // Simulate receiving a RRSET does not exist response.
+    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXRRSET());
 
     // Run removingFwdRRsHandler again to process the response.
     EXPECT_NO_THROW(name_remove->removingFwdRRsHandler());
@@ -1340,8 +1340,8 @@ TEST_F(NameRemoveTransactionTest, removingRevPtrsHandler_FqdnNotInUse) {
     EXPECT_EQ(StateModel::NOP_EVT,
               name_remove->getNextEvent());
 
-    // Simulate receiving a FQDN not in use response.
-    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXDOMAIN());
+    // Simulate receiving a RRSET does not exist.
+    name_remove->fakeResponse(DNSClient::SUCCESS, dns::Rcode::NXRRSET());
 
     // Run removingRevPtrsHandler again to process the response.
     EXPECT_NO_THROW(name_remove->removingRevPtrsHandler());