diff --git a/bindings/python/ns3_module_core.py b/bindings/python/ns3_module_core.py
index 466bf07ad..593f07a92 100644
--- a/bindings/python/ns3_module_core.py
+++ b/bindings/python/ns3_module_core.py
@@ -1874,7 +1874,7 @@ def register_functions(root_module):
     module.add_function('TypeNameGet', 
                         'std::string', 
                         [], 
-                        template_parameters=['long'])
+                        template_parameters=['long long'])
     ## type-name.h: extern std::string ns3::TypeNameGet() [free function]
     module.add_function('TypeNameGet', 
                         'std::string', 
@@ -1894,7 +1894,7 @@ def register_functions(root_module):
     module.add_function('TypeNameGet', 
                         'std::string', 
                         [], 
-                        template_parameters=['unsigned long'])
+                        template_parameters=['unsigned long long'])
     ## type-name.h: extern std::string ns3::TypeNameGet() [free function]
     module.add_function('TypeNameGet', 
                         'std::string', 
@@ -1910,22 +1910,14 @@ def register_functions(root_module):
                         'std::string', 
                         [], 
                         template_parameters=['unsigned char'])
+    ## log.h: extern void ns3::LogComponentDisable(char const * name, ns3::LogLevel level) [free function]
+    module.add_function('LogComponentDisable', 
+                        'void', 
+                        [param('char const *', 'name'), param('ns3::LogLevel', 'level')])
     ## string.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeStringChecker() [free function]
     module.add_function('MakeStringChecker', 
                         'ns3::Ptr< ns3::AttributeChecker const >', 
                         [])
-    ## enum.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeEnumChecker(int v1, std::string n1, int v2=0, std::string n2="", int v3=0, std::string n3="", int v4=0, std::string n4="", int v5=0, std::string n5="", int v6=0, std::string n6="", int v7=0, std::string n7="", int v8=0, std::string n8="", int v9=0, std::string n9="", int v10=0, std::string n10="", int v11=0, std::string n11="", int v12=0, std::string n12="") [free function]
-    module.add_function('MakeEnumChecker', 
-                        'ns3::Ptr< ns3::AttributeChecker const >', 
-                        [param('int', 'v1'), param('std::string', 'n1'), param('int', 'v2', default_value='0'), param('std::string', 'n2', default_value='""'), param('int', 'v3', default_value='0'), param('std::string', 'n3', default_value='""'), param('int', 'v4', default_value='0'), param('std::string', 'n4', default_value='""'), param('int', 'v5', default_value='0'), param('std::string', 'n5', default_value='""'), param('int', 'v6', default_value='0'), param('std::string', 'n6', default_value='""'), param('int', 'v7', default_value='0'), param('std::string', 'n7', default_value='""'), param('int', 'v8', default_value='0'), param('std::string', 'n8', default_value='""'), param('int', 'v9', default_value='0'), param('std::string', 'n9', default_value='""'), param('int', 'v10', default_value='0'), param('std::string', 'n10', default_value='""'), param('int', 'v11', default_value='0'), param('std::string', 'n11', default_value='""'), param('int', 'v12', default_value='0'), param('std::string', 'n12', default_value='""')])
-    ## log.h: extern void ns3::LogComponentEnableAll(ns3::LogLevel level) [free function]
-    module.add_function('LogComponentEnableAll', 
-                        'void', 
-                        [param('ns3::LogLevel', 'level')])
-    ## type-id.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeTypeIdChecker() [free function]
-    module.add_function('MakeTypeIdChecker', 
-                        'ns3::Ptr< ns3::AttributeChecker const >', 
-                        [])
     ## ptr.h: extern ns3::Ptr<ns3::PointerValue> ns3::Create() [free function]
     module.add_function('Create', 
                         'ns3::Ptr< ns3::PointerValue >', 
@@ -1936,6 +1928,14 @@ def register_functions(root_module):
                         'ns3::Ptr< ns3::ObjectVectorValue >', 
                         [], 
                         template_parameters=['ns3::ObjectVectorValue'])
+    ## log.h: extern void ns3::LogComponentEnableAll(ns3::LogLevel level) [free function]
+    module.add_function('LogComponentEnableAll', 
+                        'void', 
+                        [param('ns3::LogLevel', 'level')])
+    ## type-id.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeTypeIdChecker() [free function]
+    module.add_function('MakeTypeIdChecker', 
+                        'ns3::Ptr< ns3::AttributeChecker const >', 
+                        [])
     ## object-factory.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeObjectFactoryChecker() [free function]
     module.add_function('MakeObjectFactoryChecker', 
                         'ns3::Ptr< ns3::AttributeChecker const >', 
@@ -1952,14 +1952,14 @@ def register_functions(root_module):
     module.add_function('MakeRandomVariableChecker', 
                         'ns3::Ptr< ns3::AttributeChecker const >', 
                         [])
-    ## log.h: extern void ns3::LogComponentDisable(char const * name, ns3::LogLevel level) [free function]
-    module.add_function('LogComponentDisable', 
-                        'void', 
-                        [param('char const *', 'name'), param('ns3::LogLevel', 'level')])
     ## log.h: extern void ns3::LogComponentEnable(char const * name, ns3::LogLevel level) [free function]
     module.add_function('LogComponentEnable', 
                         'void', 
                         [param('char const *', 'name'), param('ns3::LogLevel', 'level')])
+    ## enum.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeEnumChecker(int v1, std::string n1, int v2=0, std::string n2="", int v3=0, std::string n3="", int v4=0, std::string n4="", int v5=0, std::string n5="", int v6=0, std::string n6="", int v7=0, std::string n7="", int v8=0, std::string n8="", int v9=0, std::string n9="", int v10=0, std::string n10="", int v11=0, std::string n11="", int v12=0, std::string n12="") [free function]
+    module.add_function('MakeEnumChecker', 
+                        'ns3::Ptr< ns3::AttributeChecker const >', 
+                        [param('int', 'v1'), param('std::string', 'n1'), param('int', 'v2', default_value='0'), param('std::string', 'n2', default_value='""'), param('int', 'v3', default_value='0'), param('std::string', 'n3', default_value='""'), param('int', 'v4', default_value='0'), param('std::string', 'n4', default_value='""'), param('int', 'v5', default_value='0'), param('std::string', 'n5', default_value='""'), param('int', 'v6', default_value='0'), param('std::string', 'n6', default_value='""'), param('int', 'v7', default_value='0'), param('std::string', 'n7', default_value='""'), param('int', 'v8', default_value='0'), param('std::string', 'n8', default_value='""'), param('int', 'v9', default_value='0'), param('std::string', 'n9', default_value='""'), param('int', 'v10', default_value='0'), param('std::string', 'n10', default_value='""'), param('int', 'v11', default_value='0'), param('std::string', 'n11', default_value='""'), param('int', 'v12', default_value='0'), param('std::string', 'n12', default_value='""')])
     register_functions_ns3_internal(module.get_submodule('internal'), root_module)
     register_functions_ns3_TimeStepPrecision(module.get_submodule('TimeStepPrecision'), root_module)
     register_functions_ns3_Config(module.get_submodule('Config'), root_module)
@@ -2017,6 +2017,10 @@ def register_functions_ns3_Config(module, root_module):
     module.add_function('SetGlobalFailSafe', 
                         'bool', 
                         [param('std::string', 'name'), param('ns3::AttributeValue const &', 'value')])
+    ## config.h: extern void ns3::Config::Disconnect(std::string path, ns3::CallbackBase const & cb) [free function]
+    module.add_function('Disconnect', 
+                        'void', 
+                        [param('std::string', 'path'), param('ns3::CallbackBase const &', 'cb')])
     ## config.h: extern uint32_t ns3::Config::GetRootNamespaceObjectN() [free function]
     module.add_function('GetRootNamespaceObjectN', 
                         'uint32_t', 
@@ -2033,10 +2037,6 @@ def register_functions_ns3_Config(module, root_module):
     module.add_function('RegisterRootNamespaceObject', 
                         'void', 
                         [param('ns3::Ptr< ns3::Object >', 'obj')])
-    ## config.h: extern void ns3::Config::Disconnect(std::string path, ns3::CallbackBase const & cb) [free function]
-    module.add_function('Disconnect', 
-                        'void', 
-                        [param('std::string', 'path'), param('ns3::CallbackBase const &', 'cb')])
     return
 
 def register_functions_ns3_olsr(module, root_module):
diff --git a/bindings/python/ns3_module_internet_stack.py b/bindings/python/ns3_module_internet_stack.py
index 0d28fcf24..439307348 100644
--- a/bindings/python/ns3_module_internet_stack.py
+++ b/bindings/python/ns3_module_internet_stack.py
@@ -358,10 +358,11 @@ def register_Ns3Ipv4L3Protocol_methods(root_module, cls):
     cls.add_method('Insert', 
                    'void', 
                    [param('ns3::Ptr< ns3::Ipv4L4Protocol >', 'protocol')])
-    ## ipv4-l3-protocol.h: ns3::Ptr<ns3::Ipv4L4Protocol> ns3::Ipv4L3Protocol::GetProtocol(int protocolNumber) [member function]
+    ## ipv4-l3-protocol.h: ns3::Ptr<ns3::Ipv4L4Protocol> ns3::Ipv4L3Protocol::GetProtocol(int protocolNumber) const [member function]
     cls.add_method('GetProtocol', 
                    'ns3::Ptr< ns3::Ipv4L4Protocol >', 
-                   [param('int', 'protocolNumber')])
+                   [param('int', 'protocolNumber')], 
+                   is_const=True)
     ## ipv4-l3-protocol.h: void ns3::Ipv4L3Protocol::Remove(ns3::Ptr<ns3::Ipv4L4Protocol> protocol) [member function]
     cls.add_method('Remove', 
                    'void', 
diff --git a/bindings/python/ns3_module_node.py b/bindings/python/ns3_module_node.py
index 648908ff5..b73ac1333 100644
--- a/bindings/python/ns3_module_node.py
+++ b/bindings/python/ns3_module_node.py
@@ -2581,10 +2581,18 @@ def register_Ns3SimpleNetDevice_methods(root_module, cls):
 
 def register_functions(root_module):
     module = root_module
-    ## mac48-address.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeMac48AddressChecker() [free function]
-    module.add_function('MakeMac48AddressChecker', 
-                        'ns3::Ptr< ns3::AttributeChecker const >', 
-                        [])
+    ## address-utils.h: extern void ns3::ReadFrom(ns3::Buffer::Iterator & i, ns3::Mac48Address & ad) [free function]
+    module.add_function('ReadFrom', 
+                        'void', 
+                        [param('ns3::Buffer::Iterator &', 'i'), param('ns3::Mac48Address &', 'ad')])
+    ## address-utils.h: extern void ns3::ReadFrom(ns3::Buffer::Iterator & i, ns3::Address & ad, uint32_t len) [free function]
+    module.add_function('ReadFrom', 
+                        'void', 
+                        [param('ns3::Buffer::Iterator &', 'i'), param('ns3::Address &', 'ad'), param('uint32_t', 'len')])
+    ## address-utils.h: extern void ns3::ReadFrom(ns3::Buffer::Iterator & i, ns3::Ipv4Address & ad) [free function]
+    module.add_function('ReadFrom', 
+                        'void', 
+                        [param('ns3::Buffer::Iterator &', 'i'), param('ns3::Ipv4Address &', 'ad')])
     ## ipv4-address.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeIpv4AddressChecker() [free function]
     module.add_function('MakeIpv4AddressChecker', 
                         'ns3::Ptr< ns3::AttributeChecker const >', 
@@ -2609,18 +2617,10 @@ def register_functions(root_module):
     module.add_function('MakeIpv4MaskChecker', 
                         'ns3::Ptr< ns3::AttributeChecker const >', 
                         [])
-    ## address-utils.h: extern void ns3::ReadFrom(ns3::Buffer::Iterator & i, ns3::Mac48Address & ad) [free function]
-    module.add_function('ReadFrom', 
-                        'void', 
-                        [param('ns3::Buffer::Iterator &', 'i'), param('ns3::Mac48Address &', 'ad')])
-    ## address-utils.h: extern void ns3::ReadFrom(ns3::Buffer::Iterator & i, ns3::Address & ad, uint32_t len) [free function]
-    module.add_function('ReadFrom', 
-                        'void', 
-                        [param('ns3::Buffer::Iterator &', 'i'), param('ns3::Address &', 'ad'), param('uint32_t', 'len')])
-    ## address-utils.h: extern void ns3::ReadFrom(ns3::Buffer::Iterator & i, ns3::Ipv4Address & ad) [free function]
-    module.add_function('ReadFrom', 
-                        'void', 
-                        [param('ns3::Buffer::Iterator &', 'i'), param('ns3::Ipv4Address &', 'ad')])
+    ## mac48-address.h: extern ns3::Ptr<ns3::AttributeChecker const> ns3::MakeMac48AddressChecker() [free function]
+    module.add_function('MakeMac48AddressChecker', 
+                        'ns3::Ptr< ns3::AttributeChecker const >', 
+                        [])
     register_functions_ns3_internal(module.get_submodule('internal'), root_module)
     register_functions_ns3_TimeStepPrecision(module.get_submodule('TimeStepPrecision'), root_module)
     register_functions_ns3_Config(module.get_submodule('Config'), root_module)
diff --git a/bindings/python/ns3_module_wifi.py b/bindings/python/ns3_module_wifi.py
index 7efe34ca3..b3c028a8d 100644
--- a/bindings/python/ns3_module_wifi.py
+++ b/bindings/python/ns3_module_wifi.py
@@ -507,16 +507,16 @@ def register_Ns3WifiRemoteStation_methods(root_module, cls):
                    'bool', 
                    [param('ns3::Ptr< ns3::Packet const >', 'packet')], 
                    is_virtual=True)
-    ## wifi-remote-station-manager.h: uint32_t ns3::WifiRemoteStation::GetNFragments(ns3::Ptr<const ns3::Packet> packet) [member function]
-    cls.add_method('GetNFragments', 
-                   'uint32_t', 
-                   [param('ns3::Ptr< ns3::Packet const >', 'packet')], 
-                   is_virtual=True)
     ## wifi-remote-station-manager.h: uint32_t ns3::WifiRemoteStation::GetFragmentSize(ns3::Ptr<const ns3::Packet> packet, uint32_t fragmentNumber) [member function]
     cls.add_method('GetFragmentSize', 
                    'uint32_t', 
                    [param('ns3::Ptr< ns3::Packet const >', 'packet'), param('uint32_t', 'fragmentNumber')], 
                    is_virtual=True)
+    ## wifi-remote-station-manager.h: uint32_t ns3::WifiRemoteStation::GetFragmentOffset(ns3::Ptr<const ns3::Packet> packet, uint32_t fragmentNumber) [member function]
+    cls.add_method('GetFragmentOffset', 
+                   'uint32_t', 
+                   [param('ns3::Ptr< ns3::Packet const >', 'packet'), param('uint32_t', 'fragmentNumber')], 
+                   is_virtual=True)
     ## wifi-remote-station-manager.h: bool ns3::WifiRemoteStation::IsLastFragment(ns3::Ptr<const ns3::Packet> packet, uint32_t fragmentNumber) [member function]
     cls.add_method('IsLastFragment', 
                    'bool', 
diff --git a/src/devices/wifi/dca-txop.cc b/src/devices/wifi/dca-txop.cc
index 24e3f64a2..a9d3f6790 100644
--- a/src/devices/wifi/dca-txop.cc
+++ b/src/devices/wifi/dca-txop.cc
@@ -305,12 +305,6 @@ DcaTxop::NeedFragmentation (void)
   return station->NeedFragmentation (m_currentPacket);
 }
 
-uint32_t
-DcaTxop::GetNFragments (void)
-{
-  WifiRemoteStation *station = GetStation (m_currentHdr.GetAddr1 ());
-  return station->GetNFragments (m_currentPacket);
-}
 void
 DcaTxop::NextFragment (void)
 {
@@ -337,12 +331,19 @@ DcaTxop::GetNextFragmentSize (void)
   return station->GetFragmentSize (m_currentPacket, m_fragmentNumber + 1);
 }
 
+uint32_t
+DcaTxop::GetFragmentOffset (void) 
+{
+  WifiRemoteStation *station = GetStation (m_currentHdr.GetAddr1 ());
+  return station->GetFragmentOffset (m_currentPacket, m_fragmentNumber);
+}
+
 Ptr<Packet>
 DcaTxop::GetFragmentPacket (WifiMacHeader *hdr)
 {
   *hdr = m_currentHdr;
   hdr->SetFragmentNumber (m_fragmentNumber);
-  uint32_t startOffset = m_fragmentNumber * GetFragmentSize ();
+  uint32_t startOffset = GetFragmentOffset ();
   Ptr<Packet> fragment;
   if (IsLastFragment ()) 
     {
diff --git a/src/devices/wifi/dca-txop.h b/src/devices/wifi/dca-txop.h
index 22d01ad09..7765520b2 100644
--- a/src/devices/wifi/dca-txop.h
+++ b/src/devices/wifi/dca-txop.h
@@ -137,9 +137,9 @@ private:
   bool NeedRtsRetransmission (void);
   bool NeedDataRetransmission (void);
   bool NeedFragmentation (void);
-  uint32_t GetNFragments (void);
   uint32_t GetNextFragmentSize (void);
   uint32_t GetFragmentSize (void);
+  uint32_t GetFragmentOffset (void);
   WifiRemoteStation *GetStation (Mac48Address to) const;
   bool IsLastFragment (void);
   void NextFragment (void);
diff --git a/src/devices/wifi/wifi-remote-station-manager.cc b/src/devices/wifi/wifi-remote-station-manager.cc
index cab82289d..a2855e3a5 100644
--- a/src/devices/wifi/wifi-remote-station-manager.cc
+++ b/src/devices/wifi/wifi-remote-station-manager.cc
@@ -656,6 +656,14 @@ WifiRemoteStation::GetFragmentSize (Ptr<const Packet> packet, uint32_t fragmentN
       return GetManager ()->GetFragmentationThreshold ();
     }
 }
+uint32_t
+WifiRemoteStation::GetFragmentOffset (Ptr<const Packet> packet, uint32_t fragmentNumber)
+{
+  uint32_t nFragment = GetNFragments (packet);
+  NS_ASSERT (fragmentNumber < nFragment);
+  uint32_t fragmentOffset = fragmentNumber * GetManager ()->GetFragmentationThreshold ();
+  return fragmentOffset;
+}
 
 bool
 WifiRemoteStation::IsLastFragment (Ptr<const Packet> packet, uint32_t fragmentNumber) 
diff --git a/src/devices/wifi/wifi-remote-station-manager.h b/src/devices/wifi/wifi-remote-station-manager.h
index 2c89e04dc..00e23f485 100644
--- a/src/devices/wifi/wifi-remote-station-manager.h
+++ b/src/devices/wifi/wifi-remote-station-manager.h
@@ -226,17 +226,18 @@ public:
    * \returns true if this packet should be fragmented, false otherwise.
    */
   virtual bool NeedFragmentation (Ptr<const Packet> packet);
-  /**
-   * \param packet the packet to send
-   * \returns the number of fragments which should be used for this packet.
-   */
-  virtual uint32_t GetNFragments (Ptr<const Packet> packet);
   /**
    * \param packet the packet to send
    * \param fragmentNumber the fragment index of the next fragment to send (starts at zero).
    * \returns the size of the corresponding fragment.
    */
   virtual uint32_t GetFragmentSize (Ptr<const Packet> packet, uint32_t fragmentNumber);
+  /**
+   * \param packet the packet to send
+   * \param fragmentNumber the fragment index of the next fragment to send (starts at zero).
+   * \returns the offset within the original packet where this fragment starts.
+   */
+  virtual uint32_t GetFragmentOffset (Ptr<const Packet> packet, uint32_t fragmentNumber);
   /**
    * \param packet the packet to send
    * \param fragmentNumber the fragment index of the next fragment to send (starts at zero).
@@ -262,6 +263,7 @@ private:
   virtual Ptr<WifiRemoteStationManager> GetManager (void) const = 0;
   virtual WifiMode DoGetDataMode (uint32_t size) = 0;
   virtual WifiMode DoGetRtsMode (void) = 0;
+  uint32_t GetNFragments (Ptr<const Packet> packet);
 protected:
   virtual void DoReportRtsFailed (void) = 0;
   virtual void DoReportDataFailed (void) = 0;