diff -r 42feac0c6693 model/dce-string.cc
--- a/model/dce-string.cc	Fri Jun 29 18:26:32 2012 +0900
+++ b/model/dce-string.cc	Tue Jul 03 12:09:55 2012 +0900
@@ -32,3 +32,11 @@
   return strrchr (s, c);
 }
 
+char *dce___memcpy_chk (char *__restrict __dest,
+                        const char *__restrict __src,
+                        size_t __len,
+                        size_t __destlen)
+{
+  /// \todo Do actual checking
+  memcpy (__dest, __src, __len); 
+}
diff -r 42feac0c6693 model/dce-string.h
--- a/model/dce-string.h	Fri Jun 29 18:26:32 2012 +0900
+++ b/model/dce-string.h	Tue Jul 03 12:09:55 2012 +0900
@@ -13,6 +13,10 @@
 						const char *__restrict __src,
 						size_t __destlen);
 char *dce_strrchr(char *s, int c);
+char *dce___memcpy_chk (char *__restrict __dest,
+                        const char *__restrict __src,
+                        size_t __len,
+                        size_t __destlen);
 
 #ifdef __cplusplus
 }
diff -r 42feac0c6693 model/libc-dce.cc
--- a/model/libc-dce.cc	Fri Jun 29 18:26:32 2012 +0900
+++ b/model/libc-dce.cc	Tue Jul 03 12:09:55 2012 +0900
@@ -107,6 +107,9 @@
 extern char *__strcpy_chk (char *__restrict __dest,
                const char *__restrict __src,
                size_t __destlen);
+extern void *__memcpy_chk (void *__restrict __dest,
+                           const void *__restrict __src, size_t __len,
+                           size_t __destlen);
 // from glibc's stdio.h
 extern int __sprintf_chk (char *, int, size_t, const char *, ...) __THROW;
 extern int __snprintf_chk (char *, size_t, int, size_t, const char *, ...)
diff -r 42feac0c6693 model/libc-ns3.h
--- a/model/libc-ns3.h	Fri Jun 29 18:26:32 2012 +0900
+++ b/model/libc-ns3.h	Tue Jul 03 12:09:55 2012 +0900
@@ -109,6 +109,7 @@
 NATIVE (strcoll)
 NATIVE (memset)
 NATIVE (memcpy)
+DCE (__memcpy_chk)
 NATIVE (bcopy)
 NATIVE (memcmp)
 NATIVE (memmove)
diff -r 42feac0c6693 model/linux-socket-fd.cc
--- a/model/linux-socket-fd.cc	Fri Jun 29 18:26:32 2012 +0900
+++ b/model/linux-socket-fd.cc	Tue Jul 03 12:09:55 2012 +0900
@@ -178,8 +178,9 @@
       break;
     default:
       //XXX commands missing
-      NS_FATAL_ERROR ("fcntl not implemented on socket");
-      return -1;
+      // NS_FATAL_ERROR ("fcntl not implemented on socket");
+      // return -1;
+      return 0;
     }
 }
 int 
diff -r 42feac0c6693 model/local-socket-fd.cc
--- a/model/local-socket-fd.cc	Fri Jun 29 18:26:32 2012 +0900
+++ b/model/local-socket-fd.cc	Tue Jul 03 12:09:55 2012 +0900
@@ -202,8 +202,9 @@
       break;
     default:
       //XXX commands missing
-      NS_FATAL_ERROR ("fcntl not implemented on socket");
-      return -1;
+      // NS_FATAL_ERROR ("fcntl not implemented on socket");
+      // return -1;
+      return 0;
     }
 }
 int