fw: move Forwarder::lookupFib to Strategy::lookupFib

refs #3664

Change-Id: Ib4dd2354d853f7d6455bf08bb6b863b5f77076c1
diff --git a/daemon/fw/forwarder.cpp b/daemon/fw/forwarder.cpp
index 7fad250..502a071 100644
--- a/daemon/fw/forwarder.cpp
+++ b/daemon/fw/forwarder.cpp
@@ -527,66 +527,6 @@
   ++m_counters.nOutNacks;
 }
 
-const fib::Entry&
-Forwarder::lookupFib(const pit::Entry& pitEntry) const
-{
-  const Interest& interest = pitEntry.getInterest();
-  // has Link object?
-  if (!interest.hasLink()) {
-    // FIB lookup with Interest name
-    const fib::Entry& fibEntry = m_fib.findLongestPrefixMatch(pitEntry);
-    NFD_LOG_TRACE("lookupFib noLinkObject found=" << fibEntry.getPrefix());
-    return fibEntry;
-  }
-
-  const Link& link = interest.getLink();
-
-  // in producer region?
-  if (m_networkRegionTable.isInProducerRegion(link)) {
-    // FIB lookup with Interest name
-    const fib::Entry& fibEntry = m_fib.findLongestPrefixMatch(pitEntry);
-    NFD_LOG_TRACE("lookupFib inProducerRegion found=" << fibEntry.getPrefix());
-    return fibEntry;
-  }
-
-  // has SelectedDelegation?
-  if (interest.hasSelectedDelegation()) {
-    // FIB lookup with SelectedDelegation
-    Name selectedDelegation = interest.getSelectedDelegation();
-    const fib::Entry& fibEntry = m_fib.findLongestPrefixMatch(selectedDelegation);
-    NFD_LOG_TRACE("lookupFib hasSelectedDelegation=" << selectedDelegation << " found=" << fibEntry.getPrefix());
-    return fibEntry;
-  }
-
-  // FIB lookup with first delegation Name
-  const fib::Entry& fibEntry0 = m_fib.findLongestPrefixMatch(link.getDelegations().begin()->second);
-  // in default-free zone?
-  bool isDefaultFreeZone = !(fibEntry0.getPrefix().size() == 0 && fibEntry0.hasNextHops());
-  if (!isDefaultFreeZone) {
-    NFD_LOG_TRACE("onContentStoreMiss inConsumerRegion found=" << fibEntry0.getPrefix());
-    return fibEntry0;
-  }
-
-  // choose and set SelectedDelegation
-  for (const std::pair<uint32_t, Name>& delegation : link.getDelegations()) {
-    const Name& delegationName = delegation.second;
-    const fib::Entry& fibEntry = m_fib.findLongestPrefixMatch(delegationName);
-    if (fibEntry.hasNextHops()) {
-      /// \todo Don't modify in-record Interests.
-      ///       Set SelectedDelegation in outgoing Interest pipeline.
-      std::for_each(pitEntry.in_begin(), pitEntry.in_end(),
-        [&delegationName] (const pit::InRecord& inR) {
-          const_cast<Interest&>(inR.getInterest()).setSelectedDelegation(delegationName);
-        });
-      NFD_LOG_TRACE("onContentStoreMiss enterDefaultFreeZone"
-                    << " setSelectedDelegation=" << delegationName);
-      return fibEntry;
-    }
-  }
-  BOOST_ASSERT(false);
-  return fibEntry0;
-}
-
 static inline bool
 compare_InRecord_expiry(const pit::InRecord& a, const pit::InRecord& b)
 {
diff --git a/daemon/fw/forwarder.hpp b/daemon/fw/forwarder.hpp
index 00645ba..44e8eb1 100644
--- a/daemon/fw/forwarder.hpp
+++ b/daemon/fw/forwarder.hpp
@@ -173,11 +173,6 @@
     return m_networkRegionTable;
   }
 
-  /** \brief performs a FIB lookup, considering Link object if present
-   */
-  const fib::Entry&
-  lookupFib(const pit::Entry& pitEntry) const;
-
 PUBLIC_WITH_TESTS_ELSE_PRIVATE: // pipelines
   /** \brief incoming Interest pipeline
    */
diff --git a/daemon/fw/strategy.cpp b/daemon/fw/strategy.cpp
index 7e668b6..efe1fac 100644
--- a/daemon/fw/strategy.cpp
+++ b/daemon/fw/strategy.cpp
@@ -87,5 +87,67 @@
   // warning: don't loop on pitEntry->getInRecords(), because in-record is deleted when sending Nack
 }
 
+const fib::Entry&
+Strategy::lookupFib(const pit::Entry& pitEntry) const
+{
+  const Fib& fib = m_forwarder.getFib();
+  const NetworkRegionTable& nrt = m_forwarder.getNetworkRegionTable();
+
+  const Interest& interest = pitEntry.getInterest();
+  // has Link object?
+  if (!interest.hasLink()) {
+    // FIB lookup with Interest name
+    const fib::Entry& fibEntry = fib.findLongestPrefixMatch(pitEntry);
+    NFD_LOG_TRACE("lookupFib noLinkObject found=" << fibEntry.getPrefix());
+    return fibEntry;
+  }
+
+  const Link& link = interest.getLink();
+
+  // in producer region?
+  if (nrt.isInProducerRegion(link)) {
+    // FIB lookup with Interest name
+    const fib::Entry& fibEntry = fib.findLongestPrefixMatch(pitEntry);
+    NFD_LOG_TRACE("lookupFib inProducerRegion found=" << fibEntry.getPrefix());
+    return fibEntry;
+  }
+
+  // has SelectedDelegation?
+  if (interest.hasSelectedDelegation()) {
+    // FIB lookup with SelectedDelegation
+    Name selectedDelegation = interest.getSelectedDelegation();
+    const fib::Entry& fibEntry = fib.findLongestPrefixMatch(selectedDelegation);
+    NFD_LOG_TRACE("lookupFib hasSelectedDelegation=" << selectedDelegation << " found=" << fibEntry.getPrefix());
+    return fibEntry;
+  }
+
+  // FIB lookup with first delegation Name
+  const fib::Entry& fibEntry0 = fib.findLongestPrefixMatch(link.getDelegations().begin()->second);
+  // in default-free zone?
+  bool isDefaultFreeZone = !(fibEntry0.getPrefix().size() == 0 && fibEntry0.hasNextHops());
+  if (!isDefaultFreeZone) {
+    NFD_LOG_TRACE("lookupFib inConsumerRegion found=" << fibEntry0.getPrefix());
+    return fibEntry0;
+  }
+
+  // choose and set SelectedDelegation
+  for (const std::pair<uint32_t, Name>& delegation : link.getDelegations()) {
+    const Name& delegationName = delegation.second;
+    const fib::Entry& fibEntry = fib.findLongestPrefixMatch(delegationName);
+    if (fibEntry.hasNextHops()) {
+      /// \todo Don't modify in-record Interests.
+      ///       Set SelectedDelegation in outgoing Interest pipeline.
+      std::for_each(pitEntry.in_begin(), pitEntry.in_end(),
+        [&delegationName] (const pit::InRecord& inR) {
+          const_cast<Interest&>(inR.getInterest()).setSelectedDelegation(delegationName);
+        });
+      NFD_LOG_TRACE("lookupFib enterDefaultFreeZone setSelectedDelegation=" << delegationName);
+      return fibEntry;
+    }
+  }
+  BOOST_ASSERT(false);
+  return fibEntry0;
+}
+
 } // namespace fw
 } // namespace nfd
diff --git a/daemon/fw/strategy.hpp b/daemon/fw/strategy.hpp
index 5cea6a6..5b3cb2b 100644
--- a/daemon/fw/strategy.hpp
+++ b/daemon/fw/strategy.hpp
@@ -179,11 +179,10 @@
             std::initializer_list<const Face*> exceptFaces = std::initializer_list<const Face*>());
 
 protected: // accessors
+  /** \brief performs a FIB lookup, considering Link object if present
+   */
   const fib::Entry&
-  lookupFib(const pit::Entry& pitEntry)
-  {
-    return m_forwarder.lookupFib(pitEntry);
-  }
+  lookupFib(const pit::Entry& pitEntry) const;
 
   MeasurementsAccessor&
   getMeasurements()