interest: Match data to Interest regardless of FreshnessPeriod/MustBeFresh

When Data is received from the wire it should match Interest with
MustBeFresh even if the Data packet doesn't specify FreshnessPeriod.

Refs: #5270
Change-Id: I2ce4d23062f6346ebcd54e2e3e6e5de5a927e516

ndn-cxx/ims/in-memory-storage.cpp

@@ -185,7 +185,7 @@ InMemoryStorage::insert(const Data& data, const time::milliseconds& mustBeFreshP
   m_freeEntries.pop();
   m_nPackets++;
   entry->setData(data);
-  if (m_scheduler != nullptr && mustBeFreshProcessingWindow > ZERO_WINDOW) {
+  if (m_scheduler != nullptr && mustBeFreshProcessingWindow >= ZERO_WINDOW) {
     entry->scheduleMarkStale(*m_scheduler, mustBeFreshProcessingWindow);
   }
   m_cache.insert(entry);

ndn-cxx/ims/in-memory-storage.hpp

@@ -134,8 +134,14 @@ public:
   /** @brief Inserts a Data packet.
    *
    *  @param data the packet to insert, must be signed and have wire encoding
-   *  @param mustBeFreshProcessingWindow Beyond this time period after the data is inserted, the
-   *         data can only be used to answer interest without MustBeFresh selector.
+   *  @param mustBeFreshProcessingWindow Beyond this time period, the inserted data can
+   *         only be used to answer interest without MustBeFresh.  The value of
+   *         mustBeFreshProcessingWindow is an application decision and it may or may not
+   *         correspond to FreshnessPeriod.
+   *
+   *  @note InMemoryStorage does not use the inserted data packet's FreshnessPeriod value.
+   *        If the packet needs to be marked "stale" after application-defined period of time,
+   *        the application must supply proper @p mustBeFreshProcessingWindow value.
    *
    *  @note Packets are considered duplicate if the name with implicit digest matches.
    *  The new Data packet with the identical name, but a different payload

ndn-cxx/interest.cpp

@@ -340,11 +340,6 @@ Interest::matchesData(const Data& data) const
     return false;
   }
 
-  // check MustBeFresh
-  if (getMustBeFresh() && data.getFreshnessPeriod() <= 0_ms) {
-    return false;
-  }
-
   return true;
 }
 

tests/unit/ims/in-memory-storage.t.cpp

@@ -562,8 +562,8 @@ BOOST_AUTO_TEST_CASE(PrefixName_NoCanBePrefix)
 
 BOOST_AUTO_TEST_CASE(MustBeFresh)
 {
-  insert(1, "/A/1"); // omitted FreshnessPeriod means FreshnessPeriod = 0 ms
-  insert(2, "/A/2", [] (Data& data) { data.setFreshnessPeriod(0_s); });
+  insert(1, "/A/1", nullptr, 0_ms); // omitted FreshnessPeriod means FreshnessPeriod = 0 ms
+  insert(2, "/A/2", [] (Data& data) { data.setFreshnessPeriod(0_s); }, 0_ms);
   insert(3, "/A/3", [] (Data& data) { data.setFreshnessPeriod(1_s); }, 1_s);
   insert(4, "/A/4", [] (Data& data) { data.setFreshnessPeriod(1_h); }, 1_h);
 

tests/unit/interest.t.cpp

@@ -659,7 +659,7 @@ BOOST_AUTO_TEST_CASE(MatchesData)
   BOOST_CHECK_EQUAL(interest->matchesData(*data), true);
 
   interest->setMustBeFresh(true);
-  BOOST_CHECK_EQUAL(interest->matchesData(*data), false); // violates MustBeFresh
+  BOOST_CHECK_EQUAL(interest->matchesData(*data), true);
 
   data->setFreshnessPeriod(1_s);
   BOOST_CHECK_EQUAL(interest->matchesData(*data), true);