diff --git a/lib/network.c b/lib/network.c
new file mode 100644
index 0000000..b68761b
--- /dev/null
+++ b/lib/network.c
@@ -0,0 +1,71 @@
+/*
+ * Network library.
+ * Copyright (C) 1997 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
+#include <zebra.h>
+
+/* Read nbytes from fd and store into ptr. */
+int
+readn (int fd, char *ptr, int nbytes)
+{
+  int nleft;
+  int nread;
+
+  nleft = nbytes;
+
+  while (nleft > 0) 
+    {
+      nread = read (fd, ptr, nleft);
+
+      if (nread < 0) 
+	return (nread);
+      else
+	if (nread == 0) 
+	  break;
+
+      nleft -= nread;
+      ptr += nread;
+    }
+
+  return nbytes - nleft;
+}  
+
+/* Write nbytes from ptr to fd. */
+int
+writen(int fd, char *ptr, int nbytes)
+{
+  int nleft;
+  int nwritten;
+
+  nleft = nbytes;
+
+  while (nleft > 0) 
+    {
+      nwritten = write(fd, ptr, nleft);
+      
+      if (nwritten <= 0) 
+	return (nwritten);
+
+      nleft -= nwritten;
+      ptr += nwritten;
+    }
+  return nbytes - nleft;
+}