added syserr.h and syserr.c
diff --git a/ggsn/syserr.h b/ggsn/syserr.h
new file mode 100644
index 0000000..ae07848
--- /dev/null
+++ b/ggsn/syserr.h
@@ -0,0 +1,26 @@
+/*
+ * Syslog functions.
+ * Copyright (C) 2003 Mondru AB.
+ *
+ * The contents of this file may be used under the terms of the GNU
+ * General Public License Version 2, provided that the above copyright
+ * notice and this permission notice is included in all copies or
+ * substantial portions of the software.
+ *
+ * The initial developer of the original code is
+ * Jens Jakobsen <jj@openggsn.org>
+ *
+ * Contributor(s):
+ *
+ */
+
+#ifndef _SYSERR_H
+#define _SYSERR_H
+
+#define SYSERR_MSGSIZE 256
+
+void sys_err(int pri, char *filename, int en, int line, char *fmt, ...);
+void sys_errpack(int pri, char *fn, int ln, int en, struct sockaddr_in *peer,
+ void *pack, unsigned len, char *fmt, ...);
+
+#endif /* !_SYSERR_H */