[2108] Implement TreeNodeRRset::getTTL()

This is used in the iterator when separating RRs.

src/lib/datasrc/memory/tests/treenode_rrset_unittest.cc

@@ -138,11 +138,13 @@ protected:
 void
 checkBasicFields(const AbstractRRset& actual_rrset, const Name& expected_name,
                  const RRClass& expected_class, const RRType& expected_type,
+                 const uint32_t expected_ttl,
                  size_t expected_rdatacount, size_t expected_sigcount)
 {
     EXPECT_EQ(expected_name, actual_rrset.getName());
     EXPECT_EQ(expected_class, actual_rrset.getClass());
     EXPECT_EQ(expected_type, actual_rrset.getType());
+    EXPECT_EQ(RRTTL(expected_ttl), actual_rrset.getTTL());
     EXPECT_EQ(expected_rdatacount, actual_rrset.getRdataCount());
     EXPECT_EQ(expected_sigcount, actual_rrset.getRRsigDataCount());
 }
@@ -150,31 +152,31 @@ checkBasicFields(const AbstractRRset& actual_rrset, const Name& expected_name,
 TEST_F(TreeNodeRRsetTest, create) {
     // Constructed with RRSIG, and it should be visible.
     checkBasicFields(TreeNodeRRset(rrclass_, www_node_, a_rdataset_, true),
-                     www_name_, rrclass_, RRType::A(), 2, 1);
+                     www_name_, rrclass_, RRType::A(), 3600, 2, 1);
     // Constructed with RRSIG, and it should be invisible.
     checkBasicFields(TreeNodeRRset(rrclass_, www_node_, a_rdataset_, false),
-                     www_name_, rrclass_, RRType::A(), 2, 0);
+                     www_name_, rrclass_, RRType::A(), 3600, 2, 0);
     // Constructed without RRSIG, and it would be visible (but of course won't)
     checkBasicFields(TreeNodeRRset(rrclass_, origin_node_, ns_rdataset_, true),
-                     origin_name_, rrclass_, RRType::NS(), 1, 0);
+                     origin_name_, rrclass_, RRType::NS(), 3600, 1, 0);
     // Constructed without RRSIG, and it should be visible
     checkBasicFields(TreeNodeRRset(rrclass_, origin_node_, ns_rdataset_,
                                    false),
-                     origin_name_, rrclass_, RRType::NS(), 1, 0);
+                     origin_name_, rrclass_, RRType::NS(), 3600, 1, 0);
     // RRSIG-only case (note the RRset's type is covered type)
     checkBasicFields(TreeNodeRRset(rrclass_, www_node_, rrsig_only_rdataset_,
                                    true),
-                     www_name_, rrclass_, RRType::TXT(), 0, 1);
+                     www_name_, rrclass_, RRType::TXT(), 3600, 0, 1);
     // RRSIG-only case (note the RRset's type is covered type), but it's
     // invisible
     checkBasicFields(TreeNodeRRset(rrclass_, www_node_, rrsig_only_rdataset_,
                                    false),
-                     www_name_, rrclass_, RRType::TXT(), 0, 0);
+                     www_name_, rrclass_, RRType::TXT(), 3600, 0, 0);
     // Wildcard substitution
     checkBasicFields(TreeNodeRRset(match_name_, rrclass_,
                                    wildcard_node_, wildcard_rdataset_,
                                    true),
-                     match_name_, rrclass_, RRType::A(), 2, 1);
+                     match_name_, rrclass_, RRType::A(), 3600, 2, 1);
 }
 
 // Templated if and when we support OutputBuffer version of toWire().

src/lib/datasrc/memory/treenode_rrset.cc

@@ -46,7 +46,7 @@ TreeNodeRRset::TreeNodeRRset(const dns::Name& realname,
                              bool dnssec_ok) :
     node_(node), rdataset_(rdataset),
     rrsig_count_(rdataset_->getSigRdataCount()), rrclass_(rrclass),
-    dnssec_ok_(dnssec_ok), name_(NULL)
+    dnssec_ok_(dnssec_ok), name_(NULL), ttl_(NULL)
 {
     const LabelSequence labels(realname);
     const size_t labels_storangelen = labels.getSerializedLength();
@@ -69,7 +69,13 @@ TreeNodeRRset::getName() const {
 
 const RRTTL&
 TreeNodeRRset::getTTL() const {
-    isc_throw(Unexpected, "unexpected method called on TreeNodeRRset");
+    if (ttl_ == NULL) {
+        util::InputBuffer ttl_buffer(rdataset_->getTTLData(),
+                                     sizeof(uint32_t));
+        ttl_ = new RRTTL(ttl_buffer);
+    }
+
+    return (*ttl_);
 }
 
 void

src/lib/datasrc/memory/treenode_rrset.h

@@ -105,7 +105,7 @@ public:
                   const RdataSet* rdataset, bool dnssec_ok) :
         node_(node), rdataset_(rdataset),
         rrsig_count_(rdataset_->getSigRdataCount()), rrclass_(rrclass),
-        dnssec_ok_(dnssec_ok), name_(NULL), realname_buf_(NULL)
+        dnssec_ok_(dnssec_ok), name_(NULL), realname_buf_(NULL), ttl_(NULL)
     {}
 
     /// \brief Constructor for wildcard-expanded owner name.
@@ -126,6 +126,7 @@ public:
 
     virtual ~TreeNodeRRset() {
         delete[] realname_buf_;
+        delete ttl_;
         delete name_;
     }
 
@@ -251,6 +252,7 @@ private:
     const bool dnssec_ok_;
     mutable dns::Name* name_;
     uint8_t* realname_buf_;
+    mutable dns::RRTTL* ttl_;
 };
 
 } // namespace memory