Mercurial > hg > freeDiameter
view extensions/app_redirect/ard_conf.y @ 1562:6219359a36a9 default tip
Merge latest changes from proposed branch
author | Sebastien Decugis <sdecugis@freediameter.net> |
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date | Mon, 21 Jun 2021 19:08:18 +0800 |
parents | 1af09cc156d6 |
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/********************************************************************************************************* * 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. * See doc/app_redirect.conf.sample for configuration file format */ /* 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 "app_redir.h" #include "ard_conf.tab.h" /* bison is not smart enough to define the YYLTYPE before including this code, so... */ /* Forward declaration */ int yyparse(char * conffile); static int rules_added = 0; /* We initialize statically the config */ static struct ard_config local_conf = { .default_rct = 86400, .rules = FD_LIST_INITIALIZER(local_conf.rules) }; struct ard_config * ard_conf = &local_conf; /* We use these lists in the rules parsing */ static struct fd_list temp_list_criteria = FD_LIST_INITIALIZER(temp_list_criteria); static struct fd_list temp_list_target = FD_LIST_INITIALIZER(temp_list_target); /* Local variable */ static struct ard_criteria * c; /* Dump the configuration */ static void ard_conf_dump() { struct fd_list * li; if (!TRACE_BOOL(FULL)) return; fd_log_debug("app_redirect: configuration dump:"); fd_log_debug(" default_redirect_cache_time : %u sec", ard_conf->default_rct); for (li = ard_conf->rules.next; li != &ard_conf->rules; li = li->next) { ard_rule_dump(li->o); } fd_log_debug("app_redirect: end of configuration dump"); } /* Parse the configuration file */ int ard_conf_handle(char * conffile) { extern FILE * ard_confin; int ret; TRACE_ENTRY("%p", conffile); TRACE_DEBUG (FULL, "Parsing configuration file: %s...", conffile); ard_confin = fopen(conffile, "r"); if (ard_confin == NULL) { ret = errno; TRACE_DEBUG(INFO, "Unable to open extension configuration file %s for reading: %s", conffile, strerror(ret)); return ret; } ret = yyparse(conffile); fclose(ard_confin); if (ret != 0) { TRACE_DEBUG (INFO, "Unable to parse the configuration file."); return EINVAL; } else { TRACE_DEBUG(FULL, "Added %d Redirect RULES successfully.", rules_added); ard_conf_dump(); } return 0; } /* The Lex parser prototype */ int ard_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) { TRACE_DEBUG (INFO, "%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) { TRACE_DEBUG (INFO, "%s:%d.%d-%d : %s", conffile, ploc->first_line, ploc->first_column, ploc->last_column, s); } else { TRACE_DEBUG (INFO, "%s:%d.%d : %s", conffile, ploc->first_line, ploc->first_column, s); } } /* Compile a regular expression pattern */ static int compile_regex( regex_t * preg, char * str ) { int err; /* Compile the regular expression */ err = regcomp(preg, str, REG_EXTENDED | REG_NOSUB); if (err != 0) { char * buf; size_t bl; /* Error while compiling the regex */ TRACE_DEBUG(INFO, "Error while compiling the regular expression '%s':", str); /* Get the error message size */ bl = regerror(err, preg, NULL, 0); /* Alloc the buffer for error message */ CHECK_MALLOC( buf = malloc(bl) ); /* Get the error message content */ regerror(err, preg, buf, bl); TRACE_DEBUG(INFO, "\t%s", buf); /* Free the buffer, return the error */ free(buf); return EINVAL; } return 0; } %} /* Values returned by lex for token */ %union { /* returned by lex */ uint32_t u32; /* Store integer values */ struct { char * str; int regex; /* true or false */ } tstring; /* typed string */ } /* In case of error in the lexical analysis */ %token TOK_LEX_ERROR /* A string (malloc'd in lex parser; it must be freed after use):*/ %token <tstring> TOK_TSTRING /* An integer value */ %token <u32> TOK_U32VAL %type <u32> rule_type %type <u32> rule_duration /* Tokens */ %token TOK_DEFAULT_RCT %token TOK_TO %token TOK_DONT_CACHE %token TOK_ALL_SESSION %token TOK_ALL_REALM %token TOK_REALM_AND_APPLICATION %token TOK_ALL_APPLICATION %token TOK_ALL_HOST %token TOK_ALL_USER %token TOK_FROM_ID %token TOK_FROM_REALM %token TOK_APP /* -------------------------------------- */ %% /* The grammar definition */ conffile: /* empty grammar is OK */ | conffile def_rct | conffile rule ; /* Overwrite default cache time value */ def_rct: TOK_DEFAULT_RCT '=' TOK_U32VAL ';' { ard_conf->default_rct = $3; } ; /* a RULE entry */ rule: rule_type rule_duration ':' criteria_list TOK_TO target_list ';' { struct ard_rule * r; /* Create the new rule with data in file */ CHECK_MALLOC_DO( r = malloc(sizeof(struct ard_rule)), { yyerror (&yylloc, conffile, "Error while allocating new memory..."); YYERROR; } ); memset(r, 0, sizeof(struct ard_rule)); fd_list_init(&r->chain, r); r->type = $1; r->rct = $2; fd_list_init(&r->criteria, NULL); fd_list_move_end(&r->criteria, &temp_list_criteria); fd_list_init(&r->targets, NULL); fd_list_move_end(&r->targets, &temp_list_target); /* Add the new rule in config */ fd_list_insert_before(&ard_conf->rules, &r->chain); rules_added++; } ; rule_type: TOK_DONT_CACHE { $$ = DONT_CACHE; } | TOK_ALL_SESSION { $$ = ALL_SESSION; } | TOK_ALL_REALM { $$ = ALL_REALM; } | TOK_REALM_AND_APPLICATION { $$ = REALM_AND_APPLICATION; } | TOK_ALL_APPLICATION { $$ = ALL_APPLICATION; } | TOK_ALL_HOST { $$ = ALL_HOST; } | TOK_ALL_USER { $$ = ALL_USER; } ; rule_duration: /* empty */ { $$ = 0; } | TOK_U32VAL { $$ = $1; } ; criteria_list: /* empty is OK */ | criteria_list criteria_item; ; criteria_item: { /* Create the new criteria */ CHECK_MALLOC_DO( c = malloc(sizeof(struct ard_criteria)), { yyerror (&yylloc, conffile, "Error while allocating new memory..."); YYERROR; } ); memset(c, 0, sizeof(struct ard_criteria)); fd_list_init(&c->chain, c); } criteria_item_inside { struct fd_list * li; /* If there is a string, save its length */ if (c->s) c->sl = strlen(c->s); /* If the criteria contains a regex, parse it */ if (c->is_regex) { CHECK_FCT_DO( compile_regex( &c->preg, c->s ), { yyerror (&yylloc, conffile, "Error parsing a regular expression..."); YYERROR; } ); } /* Now link this new criteria in the list. Order by criteria type to accelerate the search */ for (li = temp_list_criteria.next; li != &temp_list_criteria; li = li->next) { struct ard_criteria * nc = li->o; if (nc->type >= c->type) break; } fd_list_insert_before(li, &c->chain); } ; criteria_item_inside: TOK_FROM_ID '=' TOK_TSTRING { c->type = FROM_ID; c->s = $3.str; c->is_regex = $3.regex; } | TOK_FROM_REALM '=' TOK_TSTRING { c->type = FROM_REALM; c->s = $3.str; c->is_regex = $3.regex; } | TOK_APP '=' TOK_U32VAL { c->type = APP_ID; c->i = $3; } | TOK_TSTRING '=' TOK_U32VAL { struct dict_object * avp = NULL; if ($1.regex) { yyerror(&yylloc, conffile, "Error: the AVP name cannot be specified as regular expression"); YYERROR; } CHECK_FCT_DO( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME_ALL_VENDORS, $1.str, &avp, ENOENT ), { TRACE_DEBUG(INFO, "Error while searching for AVP '%s'. Did you load the relevant dictionary extensions?", $1.str); yyerror(&yylloc, conffile, "Unable to resolve specified AVP name."); YYERROR; } ); CHECK_FCT_DO( fd_dict_getval(avp, &c->avp_info), { TRACE_DEBUG(INFO, "Error while retrieving the description for AVP '%s'", $1.str); yyerror(&yylloc, conffile, "Unable to retrieve specified AVP's data."); YYERROR; } ); if (c->avp_info.avp_basetype != AVP_TYPE_UNSIGNED32) { TRACE_DEBUG(INFO, "The AVP '%s' is not of type UNSIGNED32, matching is not supported (yet)", $1.str); yyerror(&yylloc, conffile, "Invalid AVP for this operation."); YYERROR; } c->type = AVP_INT; c->i = $3; } | TOK_TSTRING '=' TOK_TSTRING { struct dict_object * avp = NULL; if ($1.regex) { yyerror(&yylloc, conffile, "Error: the AVP name cannot be specified as regular expression"); YYERROR; } CHECK_FCT_DO( fd_dict_search( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME_ALL_VENDORS, $1.str, &avp, ENOENT ), { TRACE_DEBUG(INFO, "Error while searching for AVP '%s'. Did you load the relevant dictionary extensions?", $1.str); yyerror(&yylloc, conffile, "Unable to resolve specified AVP name."); YYERROR; } ); CHECK_FCT_DO( fd_dict_getval(avp, &c->avp_info), { TRACE_DEBUG(INFO, "Error while retrieving the description for AVP '%s'", $1.str); yyerror(&yylloc, conffile, "Unable to retrieve specified AVP's data."); YYERROR; } ); if (c->avp_info.avp_basetype != AVP_TYPE_OCTETSTRING) { TRACE_DEBUG(INFO, "The AVP '%s' is not of type OCTETSTRING, matching is not supported (yet)", $1.str); yyerror(&yylloc, conffile, "Invalid AVP for this operation."); YYERROR; } c->type = AVP_STR; c->s = $3.str; c->is_regex = $3.regex; } ; target_list: /* This list cannot be empty */ target_item | target_list target_item ; target_item: TOK_TSTRING { struct ard_target * t; if ($1.regex) { yyerror(&yylloc, conffile, "Regular expressions are not allowed in Redirect-Host specification."); YYERROR; } /* Check if the format is valid */ CHECK_FCT_DO( fd_os_parse_DiameterURI((uint8_t *)$1.str, strlen($1.str), NULL, NULL, NULL, NULL, NULL, NULL), { TRACE_DEBUG(INFO, "Error while parsing DiameterURI '%s'", $1.str); yyerror(&yylloc, conffile, "Specified DiameterURI is invalid."); YYERROR; } ); /* Ok. we create the new target */ CHECK_MALLOC_DO( t = malloc(sizeof(struct ard_target)), { yyerror (&yylloc, conffile, "Error while allocating new memory..."); YYERROR; } ); memset(t, 0, sizeof(struct ard_target)); fd_list_init(&t->chain, t); t->s = (os0_t) $1.str; t->l = strlen($1.str); fd_list_insert_before(&temp_list_target, &t->chain); } ;