diff --git a/src/liboconfig/scanner.l b/src/liboconfig/scanner.l
--- /dev/null
+++ b/src/liboconfig/scanner.l
@@ -0,0 +1,57 @@
+/**
+ * oconfig - src/scanner.l
+ * Copyright (C) 2007 Florian octo Forster <octo at verplant.org>
+ *
+ * This program 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; only version 2 of the License is applicable.
+ *
+ * This program 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
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+%{
+#include <stdlib.h>
+#include "oconfig.h"
+#include "aux_types.h"
+#include "parser.h"
+%}
+WHITE_SPACE [\ \t\b]
+QUOTED_STRING \"([^\\"]+|\\.)*\"
+UNQUOTED_STRING [0-9A-Za-z_]+
+HEX_NUMBER 0[xX][0-9a-fA-F]+
+OCT_NUMBER 0[0-7]+
+DEC_NUMBER [\+\-]?[0-9]+
+FLOAT_NUMBER [\+\-]?[0-9]*\.[0-9]+([eE][\+\-][0-9]+)?
+NUMBER ({FLOAT_NUMBER}|{HEX_NUMBER}|{OCT_NUMBER}|{DEC_NUMBER})
+BOOL_TRUE (true|yes|on)
+BOOL_FALSE (false|no|off)
+COMMENT #.*
+PORT (6(5(5(3[0-5]|[0-2][0-9])|[0-4][0-9][0-9])|[0-4][0-9][0-9][0-9])|[1-5][0-9][0-9][0-9][0-9]|[1-9][0-9]?[0-9]?[0-9]?)
+IP_BYTE (2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])
+IPV4_ADDR {IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}\.{IP_BYTE}(:{PORT})?
+
+%%
+{WHITE_SPACE} |
+{COMMENT} {/* ignore */}
+
+\n {return (EOL);}
+"/" {return (SLASH);}
+"<" {return (OPENBRAC);}
+">" {return (CLOSEBRAC);}
+{BOOL_TRUE} {yylval.boolean = 1; return (TRUE);}
+{BOOL_FALSE} {yylval.boolean = 0; return (FALSE);}
+
+{IPV4_ADDR} {yylval.string = yytext; return (UNQUOTED_STRING);}
+
+{NUMBER} {yylval.number = strtod (yytext, NULL); return (NUMBER);}
+
+{QUOTED_STRING} {yylval.string = yytext; return (QUOTED_STRING);}
+{UNQUOTED_STRING} {yylval.string = yytext; return (UNQUOTED_STRING);}
+%%