packet tag for recvif

diff -r e5b8703bb1eb src/node/node.cc
--- a/src/node/node.cc	Wed Jan 06 01:27:01 2010 +0900
+++ b/src/node/node.cc	Wed Jan 06 01:33:39 2010 +0900
@@ -30,6 +30,7 @@
 #include "ns3/assert.h"
 #include "ns3/global-value.h"
 #include "ns3/boolean.h"
+#include "ns3/socket.h"
 
 NS_LOG_COMPONENT_DEFINE ("Node");
 
@@ -251,6 +252,10 @@
                << ") Packet UID " << packet->GetUid ());
   bool found = false;
 
+  SocketRecvIfTag tag;
+  tag.SetRecvIf (device->GetIfIndex());
+  packet->AddPacketTag (tag);
+
   for (ProtocolHandlerList::iterator i = m_handlers.begin ();
        i != m_handlers.end (); i++)
     {
diff -r e5b8703bb1eb src/node/socket.cc
--- a/src/node/socket.cc	Wed Jan 06 01:27:01 2010 +0900
+++ b/src/node/socket.cc	Wed Jan 06 01:33:39 2010 +0900
@@ -428,4 +428,58 @@
   os << (m_dontFragment?"true":"false");
 }
 
+
+SocketRecvIfTag::SocketRecvIfTag ()  
+{
+}
+
+void 
+SocketRecvIfTag::SetRecvIf (uint32_t ifindex)
+{
+  m_ifindex = ifindex;
+}
+
+uint32_t 
+SocketRecvIfTag::GetRecvIf (void) const
+{
+  return m_ifindex;
+}
+
+
+TypeId
+SocketRecvIfTag::GetTypeId (void)
+{
+  static TypeId tid = TypeId ("ns3::SocketRecvIfTag")
+    .SetParent<Tag> ()
+    .AddConstructor<SocketRecvIfTag> ()
+    ;
+  return tid;
+}
+TypeId
+SocketRecvIfTag::GetInstanceTypeId (void) const
+{
+  return GetTypeId ();
+}
+
+uint32_t 
+SocketRecvIfTag::GetSerializedSize (void) const
+{ 
+  return sizeof(uint32_t);
+}
+void 
+SocketRecvIfTag::Serialize (TagBuffer i) const
+{ 
+  i.WriteU32 (m_ifindex);
+}
+void 
+SocketRecvIfTag::Deserialize (TagBuffer i)
+{ 
+  m_ifindex = i.ReadU32 ();
+}
+void
+SocketRecvIfTag::Print (std::ostream &os) const
+{
+  os << "RecvIf=" << (uint32_t) m_ifindex;
+}
+
 }//namespace ns3
diff -r e5b8703bb1eb src/node/socket.h
--- a/src/node/socket.h	Wed Jan 06 01:27:01 2010 +0900
+++ b/src/node/socket.h	Wed Jan 06 01:33:39 2010 +0900
@@ -79,6 +79,8 @@
     ERROR_INVAL,
     ERROR_BADF,
     ERROR_NOROUTETOHOST,
+    ERROR_NODEV,
+    ERROR_ADDRNOTAVAIL,
     SOCKET_ERRNO_LAST
   };
 
@@ -579,6 +581,29 @@
   bool m_dontFragment;
 };
 
+/**
+ * \brief This class implements a tag that carries the information of
+ * received interface of a packet to the socket layer
+ */
+class SocketRecvIfTag : public Tag
+{
+public:
+  SocketRecvIfTag ();
+  void SetRecvIf (uint32_t ifindex);
+  uint32_t GetRecvIf (void) const;
+
+  static TypeId GetTypeId (void);  
+  virtual TypeId GetInstanceTypeId (void) const;
+  virtual uint32_t GetSerializedSize (void) const;
+  virtual void Serialize (TagBuffer i) const;
+  virtual void Deserialize (TagBuffer i);
+  virtual void Print (std::ostream &os) const;
+
+private:
+  uint8_t m_ifindex;
+};
+
+
 } //namespace ns3
 
 #endif /* SOCKET_H */