Initial commit
Change-Id: I6a4444e3c193dae437cd7929f4c39aba7b749efa
diff --git a/extensions/rt_ereg/rtereg_conf.y b/extensions/rt_ereg/rtereg_conf.y
new file mode 100644
index 0000000..a213323
--- /dev/null
+++ b/extensions/rt_ereg/rtereg_conf.y
@@ -0,0 +1,209 @@
+/*********************************************************************************************************
+* Software License Agreement (BSD License) *
+* Author: Sebastien Decugis <sdecugis@freediameter.net> *
+* *
+* Copyright (c) 2013, WIDE Project and NICT *
+* All rights reserved. *
+* *
+* Redistribution and use of this software in source and binary forms, with or without modification, are *
+* permitted provided that the following conditions are met: *
+* *
+* * Redistributions of source code must retain the above *
+* copyright notice, this list of conditions and the *
+* following disclaimer. *
+* *
+* * Redistributions in binary form must reproduce the above *
+* copyright notice, this list of conditions and the *
+* following disclaimer in the documentation and/or other *
+* materials provided with the distribution. *
+* *
+* * Neither the name of the WIDE Project or NICT nor the *
+* names of its contributors may be used to endorse or *
+* promote products derived from this software without *
+* specific prior written permission of WIDE Project and *
+* NICT. *
+* *
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
+* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
+* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
+* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
+* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF *
+* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
+*********************************************************************************************************/
+
+/* Yacc extension's configuration parser.
+ */
+
+/* For development only : */
+%debug
+%error-verbose
+
+/* The parser receives the configuration file filename as parameter */
+%parse-param {char * conffile}
+
+/* Keep track of location */
+%locations
+%pure-parser
+
+%{
+#include "rtereg.h"
+#include "rtereg_conf.tab.h" /* bison is not smart enough to define the YYLTYPE before including this code, so... */
+
+/* Forward declaration */
+int yyparse(char * conffile);
+
+/* Parse the configuration file */
+int rtereg_conf_handle(char * conffile)
+{
+ extern FILE * rtereg_confin;
+ int ret;
+
+ TRACE_ENTRY("%p", conffile);
+
+ TRACE_DEBUG (FULL, "Parsing configuration file: %s...", conffile);
+
+ rtereg_confin = fopen(conffile, "r");
+ if (rtereg_confin == NULL) {
+ ret = errno;
+ fd_log_debug("Unable to open extension configuration file %s for reading: %s", conffile, strerror(ret));
+ TRACE_DEBUG (INFO, "Error occurred, message logged -- configuration file.");
+ return ret;
+ }
+
+ ret = yyparse(conffile);
+
+ fclose(rtereg_confin);
+
+ if (ret != 0) {
+ TRACE_DEBUG (INFO, "Unable to parse the configuration file.");
+ return EINVAL;
+ } else {
+ TRACE_DEBUG(FULL, "[rt-ereg] Added %d rules successfully.", rtereg_conf.rules_nb);
+ }
+
+ return 0;
+}
+
+/* The Lex parser prototype */
+int rtereg_conflex(YYSTYPE *lvalp, YYLTYPE *llocp);
+
+/* Function to report the errors */
+void yyerror (YYLTYPE *ploc, char * conffile, char const *s)
+{
+ TRACE_DEBUG(INFO, "Error in configuration parsing");
+
+ if (ploc->first_line != ploc->last_line)
+ fd_log_debug("%s:%d.%d-%d.%d : %s", conffile, ploc->first_line, ploc->first_column, ploc->last_line, ploc->last_column, s);
+ else if (ploc->first_column != ploc->last_column)
+ fd_log_debug("%s:%d.%d-%d : %s", conffile, ploc->first_line, ploc->first_column, ploc->last_column, s);
+ else
+ fd_log_debug("%s:%d.%d : %s", conffile, ploc->first_line, ploc->first_column, s);
+}
+
+%}
+
+/* Values returned by lex for token */
+%union {
+ char *string; /* The string is allocated by strdup in lex.*/
+ int integer;
+}
+
+/* In case of error in the lexical analysis */
+%token LEX_ERROR
+
+/* A (de)quoted string (malloc'd in lex parser; it must be freed after use) */
+%token <string> QSTRING
+%token <integer> INTEGER
+
+/* Tokens */
+%token AVP
+
+
+/* -------------------------------------- */
+%%
+
+ /* The grammar definition */
+conffile: rules avp rules
+ ;
+
+ /* a server entry */
+avp: AVP '=' QSTRING ';'
+ {
+ if (rtereg_conf.avp != NULL) {
+ yyerror(&yylloc, conffile, "Only one AVP can be specified");
+ YYERROR;
+ }
+
+ CHECK_FCT_DO( fd_dict_search ( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, $3, &rtereg_conf.avp, ENOENT ),
+ {
+ TRACE_DEBUG(INFO, "Unable to find '%s' AVP in the loaded dictionaries.", $3);
+ yyerror (&yylloc, conffile, "Invalid AVP value.");
+ YYERROR;
+ } );
+
+ /* Now check the type */
+ {
+ struct dict_avp_data data;
+ CHECK_FCT( fd_dict_getval( rtereg_conf.avp, &data) );
+ CHECK_PARAMS_DO (data.avp_basetype == AVP_TYPE_OCTETSTRING,
+ {
+ TRACE_DEBUG(INFO, "'%s' AVP in not an OCTETSTRING AVP (%d).", $3, data.avp_basetype);
+ yyerror (&yylloc, conffile, "AVP in not an OCTETSTRING type.");
+ YYERROR;
+ } );
+ }
+ }
+ ;
+
+rules: /* empty OK */
+ | rules rule
+ ;
+
+rule: QSTRING ':' QSTRING '+' '=' INTEGER ';'
+ {
+ struct rtereg_rule * new;
+ int err;
+
+ /* Add new rule in the array */
+ rtereg_conf.rules_nb += 1;
+ CHECK_MALLOC_DO(rtereg_conf.rules = realloc(rtereg_conf.rules, rtereg_conf.rules_nb * sizeof(struct rtereg_rule)),
+ {
+ yyerror (&yylloc, conffile, "Not enough memory to store the configuration...");
+ YYERROR;
+ } );
+
+ new = &rtereg_conf.rules[rtereg_conf.rules_nb - 1];
+
+ new->pattern = $1;
+ new->server = $3;
+ new->score = $6;
+
+ /* Attempt to compile the regex */
+ CHECK_FCT_DO( err=regcomp(&new->preg, new->pattern, REG_EXTENDED | REG_NOSUB),
+ {
+ char * buf;
+ size_t bl;
+
+ /* Error while compiling the regex */
+ TRACE_DEBUG(INFO, "Error while compiling the regular expression '%s':", new->pattern);
+
+ /* Get the error message size */
+ bl = regerror(err, &new->preg, NULL, 0);
+
+ /* Alloc the buffer for error message */
+ CHECK_MALLOC( buf = malloc(bl) );
+
+ /* Get the error message content */
+ regerror(err, &new->preg, buf, bl);
+ TRACE_DEBUG(INFO, "\t%s", buf);
+
+ /* Free the buffer, return the error */
+ free(buf);
+
+ yyerror (&yylloc, conffile, "Invalid regular expression.");
+ YYERROR;
+ } );
+ }
+ ;