diff --git a/src/lsa.cpp b/src/lsa.cpp
index 1b5e804..9c05710 100644
--- a/src/lsa.cpp
+++ b/src/lsa.cpp
@@ -59,7 +59,7 @@
 }
 
 std::string
-NameLsa::getData()
+NameLsa::getData() const
 {
   std::ostringstream os;
   os << m_origRouter << "|" << Lsa::Type::NAME << "|" << m_lsSeqNo << "|"
@@ -165,7 +165,7 @@
 }
 
 std::string
-CoordinateLsa::getData()
+CoordinateLsa::getData() const
 {
   std::ostringstream os;
   os << m_origRouter << "|" << Lsa::Type::COORDINATE << "|" << m_lsSeqNo << "|"
@@ -258,7 +258,7 @@
 }
 
 std::string
-AdjLsa::getData()
+AdjLsa::getData() const
 {
   std::ostringstream os;
   os << m_origRouter << "|" << Lsa::Type::ADJACENCY << "|" << m_lsSeqNo << "|"
@@ -402,6 +402,8 @@
     return "COORDINATE";
   case nlsr::Lsa::Type::NAME:
     return "NAME";
+  case nlsr::Lsa::Type::MOCK:
+    return "MOCK";
   default:
     return "BASE";
   }
diff --git a/src/lsa.hpp b/src/lsa.hpp
index dd69d8e..afd97e7 100644
--- a/src/lsa.hpp
+++ b/src/lsa.hpp
@@ -41,7 +41,8 @@
     ADJACENCY,
     COORDINATE,
     NAME,
-    BASE
+    BASE,
+    MOCK
   };
 
   Lsa()
@@ -106,6 +107,12 @@
     return m_expiringEventId;
   }
 
+  virtual std::string
+  getData() const = 0;
+
+  virtual bool
+  initializeFromContent(const std::string& content) = 0;
+
 protected:
   ndn::Name m_origRouter;
   uint32_t m_lsSeqNo;
@@ -168,7 +175,7 @@
     2\>|...|\<prefix n\>|
    */
   std::string
-  getData();
+  getData() const override;
 
   /*! \brief Initializes this LSA object with content's data.
 
@@ -179,7 +186,7 @@
     getData(); getData() returns data of this format, in other words.
    */
   bool
-  initializeFromContent(const std::string& content);
+  initializeFromContent(const std::string& content) override;
 
   bool
   isEqualContent(const NameLsa& other) const;
@@ -239,7 +246,7 @@
     n\>|\<cost n\>|
    */
   std::string
-  getData();
+  getData() const override;
 
   /*! \brief Initializes this adj. LSA from the supplied content.
 
@@ -247,7 +254,7 @@
     according to getData().
    */
   bool
-  initializeFromContent(const std::string& content);
+  initializeFromContent(const std::string& content) override;
 
   uint32_t
   getNoLink()
@@ -317,7 +324,7 @@
     router\>|coordinate|\<seq. no.\>|\<exp. time\>|\<radians\>|\<theta\>|
   */
   std::string
-  getData();
+  getData() const override;
 
   /*! \brief Initializes this coordinate LSA with the data in content.
 
@@ -328,7 +335,7 @@
     same as for getData();
   */
   bool
-  initializeFromContent(const std::string& content);
+  initializeFromContent(const std::string& content) override;
 
   double
   getCorRadius() const