bug 245: build failure with gcc 4.3.x

src/node/address.cc

@@ -1,5 +1,6 @@
 #include "ns3/assert.h"
 #include "address.h"
+#include <string.h>
 #include <iostream>
 #include <iomanip>
 

src/node/mac48-address.cc

@@ -22,6 +22,7 @@
 #include "ns3/assert.h"
 #include <iomanip>
 #include <iostream>
+#include <string.h>
 
 namespace ns3 {
 

src/node/mac64-address.cc

@@ -22,6 +22,7 @@
 #include "ns3/assert.h"
 #include <iomanip>
 #include <iostream>
+#include <string.h>
 
 namespace ns3 {
 

src/node/socket.cc

@@ -25,6 +25,7 @@
 #include "node.h"
 #include "socket.h"
 #include "socket-factory.h"
+#include <limits>
 
 NS_LOG_COMPONENT_DEFINE ("Socket");