Mercurial > hg > freeDiameter
annotate extensions/rt_ereg/rtereg_conf.y @ 1338:f1b65381c1e7
rt_ereg: Support config reload. Support grouped AVPs. Support multiple separate AVPs.
Written for Effortel Technologies SA, published with their consent.
| author | Thomas Klausner <tk@giga.or.at> |
|---|---|
| date | Tue, 09 Apr 2019 15:48:45 +0200 |
| parents | 1af09cc156d6 |
| children | fedc9eea70bc |
| rev | line source |
|---|---|
| 525 | 1 /********************************************************************************************************* |
| 2 * Software License Agreement (BSD License) * | |
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3 * Author: Sebastien Decugis <sdecugis@freediameter.net> * |
| 525 | 4 * * |
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5 * Copyright (c) 2013, WIDE Project and NICT * |
| 525 | 6 * All rights reserved. * |
| 7 * * | |
| 8 * Redistribution and use of this software in source and binary forms, with or without modification, are * | |
| 9 * permitted provided that the following conditions are met: * | |
| 10 * * | |
| 11 * * Redistributions of source code must retain the above * | |
| 12 * copyright notice, this list of conditions and the * | |
| 13 * following disclaimer. * | |
| 14 * * | |
| 15 * * Redistributions in binary form must reproduce the above * | |
| 16 * copyright notice, this list of conditions and the * | |
| 17 * following disclaimer in the documentation and/or other * | |
| 18 * materials provided with the distribution. * | |
| 19 * * | |
| 20 * * Neither the name of the WIDE Project or NICT nor the * | |
| 21 * names of its contributors may be used to endorse or * | |
| 22 * promote products derived from this software without * | |
| 23 * specific prior written permission of WIDE Project and * | |
| 24 * NICT. * | |
| 25 * * | |
| 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED * | |
| 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * | |
| 28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * | |
| 29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * | |
| 30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * | |
| 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * | |
| 32 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * | |
| 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * | |
| 34 *********************************************************************************************************/ | |
| 35 | |
| 36 /* Yacc extension's configuration parser. | |
| 37 */ | |
| 38 | |
| 39 /* For development only : */ | |
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40 %debug |
| 525 | 41 %error-verbose |
| 42 | |
| 43 /* The parser receives the configuration file filename as parameter */ | |
| 44 %parse-param {char * conffile} | |
| 45 | |
| 46 /* Keep track of location */ | |
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47 %locations |
| 525 | 48 %pure-parser |
| 49 | |
| 50 %{ | |
| 51 #include "rtereg.h" | |
| 52 #include "rtereg_conf.tab.h" /* bison is not smart enough to define the YYLTYPE before including this code, so... */ | |
| 53 | |
| 54 /* Forward declaration */ | |
| 55 int yyparse(char * conffile); | |
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56 void rtereg_confrestart(FILE *input_file); |
| 525 | 57 |
| 58 /* Parse the configuration file */ | |
| 59 int rtereg_conf_handle(char * conffile) | |
| 60 { | |
| 61 extern FILE * rtereg_confin; | |
| 62 int ret; | |
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63 |
| 525 | 64 TRACE_ENTRY("%p", conffile); |
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65 |
| 525 | 66 TRACE_DEBUG (FULL, "Parsing configuration file: %s...", conffile); |
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67 |
| 525 | 68 rtereg_confin = fopen(conffile, "r"); |
| 69 if (rtereg_confin == NULL) { | |
| 70 ret = errno; | |
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71 fd_log_debug("Unable to open extension configuration file %s for reading: %s", conffile, strerror(ret)); |
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72 TRACE_DEBUG (INFO, "rt_ereg: error occurred, message logged -- configuration file."); |
| 525 | 73 return ret; |
| 74 } | |
| 75 | |
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76 rtereg_confrestart(rtereg_confin); |
| 525 | 77 ret = yyparse(conffile); |
| 78 | |
| 79 fclose(rtereg_confin); | |
| 80 | |
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81 if (rtereg_conf[rtereg_conf_size-1].finished == 0) { |
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82 TRACE_DEBUG(INFO, "rt_ereg: configuration invalid, AVP ended without OCTETSTRING AVP"); |
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83 return EINVAL; |
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84 } |
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85 |
| 525 | 86 if (ret != 0) { |
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87 TRACE_DEBUG(INFO, "rt_ereg: unable to parse the configuration file."); |
| 525 | 88 return EINVAL; |
| 89 } else { | |
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90 int i, sum = 0; |
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91 for (i=0; i<rtereg_conf_size; i++) { |
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92 sum += rtereg_conf[i].rules_nb; |
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93 } |
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94 TRACE_DEBUG(FULL, "[rt-ereg] Added %d rules successfully.", sum); |
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95 } |
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96 |
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97 return 0; |
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98 } |
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99 |
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100 int avp_add(const char *name) |
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101 { |
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102 void *ret; |
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103 int level; |
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104 |
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105 if (rtereg_conf[rtereg_conf_size-1].finished) { |
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106 if ((ret = realloc(rtereg_conf, sizeof(*rtereg_conf)*(rtereg_conf_size+1))) == NULL) { |
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107 TRACE_DEBUG(INFO, "rt_ereg: realloc failed"); |
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108 return -1; |
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109 } |
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110 rtereg_conf_size++; |
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111 rtereg_conf = ret; |
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112 memset(&rtereg_conf[rtereg_conf_size-1], 0, sizeof(*rtereg_conf)); |
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113 TRACE_DEBUG(INFO, "rt_ereg: New AVP group found starting with %s", name); |
| 525 | 114 } |
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115 level = rtereg_conf[rtereg_conf_size-1].level + 1; |
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116 |
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117 if ((ret = realloc(rtereg_conf[rtereg_conf_size-1].avps, sizeof(*rtereg_conf[rtereg_conf_size-1].avps)*level)) == NULL) { |
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118 TRACE_DEBUG(INFO, "rt_ereg: realloc failed"); |
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119 return -1; |
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120 } |
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121 rtereg_conf[rtereg_conf_size-1].avps = ret; |
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122 |
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123 CHECK_FCT_DO( fd_dict_search ( fd_g_config->cnf_dict, DICT_AVP, AVP_BY_NAME, name, &rtereg_conf[rtereg_conf_size-1].avps[level-1], ENOENT ), |
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124 { |
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125 TRACE_DEBUG(INFO, "rt_ereg: Unable to find '%s' AVP in the loaded dictionaries.", name); |
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126 return -1; |
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127 } ); |
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128 |
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129 /* Now check the type */ |
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130 { |
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131 struct dict_avp_data data; |
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132 CHECK_FCT( fd_dict_getval( rtereg_conf[rtereg_conf_size-1].avps[level-1], &data) ); |
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133 if (data.avp_basetype == AVP_TYPE_OCTETSTRING) { |
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134 rtereg_conf[rtereg_conf_size-1].finished = 1; |
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135 } else if (data.avp_basetype != AVP_TYPE_GROUPED) { |
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136 TRACE_DEBUG(INFO, "rt_ereg: '%s' AVP is not an OCTETSTRING nor GROUPED AVP (%d).", name, data.avp_basetype); |
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137 return -1; |
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138 } |
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139 } |
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140 rtereg_conf[rtereg_conf_size-1].level = level; |
| 525 | 141 return 0; |
| 142 } | |
| 143 | |
| 144 /* The Lex parser prototype */ | |
| 145 int rtereg_conflex(YYSTYPE *lvalp, YYLTYPE *llocp); | |
| 146 | |
| 147 /* Function to report the errors */ | |
| 148 void yyerror (YYLTYPE *ploc, char * conffile, char const *s) | |
| 149 { | |
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150 TRACE_DEBUG(INFO, "rt_ereg: error in configuration parsing"); |
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151 |
| 525 | 152 if (ploc->first_line != ploc->last_line) |
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153 fd_log_debug("%s:%d.%d-%d.%d : %s", conffile, ploc->first_line, ploc->first_column, ploc->last_line, ploc->last_column, s); |
| 525 | 154 else if (ploc->first_column != ploc->last_column) |
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155 fd_log_debug("%s:%d.%d-%d : %s", conffile, ploc->first_line, ploc->first_column, ploc->last_column, s); |
| 525 | 156 else |
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157 fd_log_debug("%s:%d.%d : %s", conffile, ploc->first_line, ploc->first_column, s); |
| 525 | 158 } |
| 159 | |
| 160 %} | |
| 161 | |
| 162 /* Values returned by lex for token */ | |
| 163 %union { | |
| 164 char *string; /* The string is allocated by strdup in lex.*/ | |
| 165 int integer; | |
| 166 } | |
| 167 | |
| 168 /* In case of error in the lexical analysis */ | |
| 169 %token LEX_ERROR | |
| 170 | |
| 171 /* A (de)quoted string (malloc'd in lex parser; it must be freed after use) */ | |
| 172 %token <string> QSTRING | |
| 173 %token <integer> INTEGER | |
| 174 | |
| 175 /* Tokens */ | |
| 176 %token AVP | |
| 177 | |
| 178 | |
| 179 /* -------------------------------------- */ | |
| 180 %% | |
| 181 | |
| 182 /* The grammar definition */ | |
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183 conffile: avp rules |
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184 | conffile avp rules |
| 525 | 185 ; |
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186 |
| 525 | 187 /* a server entry */ |
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188 avp: AVP '=' avp_part ';' |
| 525 | 189 ; |
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190 |
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191 avp_part: avp_part ':' QSTRING { if (avp_add($3) < 0) { YYERROR; } } |
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192 | QSTRING { if (avp_add($1) < 0) { YYERROR; } } |
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193 ; |
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194 |
| 525 | 195 rules: /* empty OK */ |
| 196 | rules rule | |
| 197 ; | |
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198 |
| 525 | 199 rule: QSTRING ':' QSTRING '+' '=' INTEGER ';' |
| 200 { | |
| 201 struct rtereg_rule * new; | |
| 202 int err; | |
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203 |
| 525 | 204 /* Add new rule in the array */ |
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205 rtereg_conf[rtereg_conf_size-1].rules_nb += 1; |
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206 CHECK_MALLOC_DO(rtereg_conf[rtereg_conf_size-1].rules = realloc(rtereg_conf[rtereg_conf_size-1].rules, rtereg_conf[rtereg_conf_size-1].rules_nb * sizeof(struct rtereg_rule)), |
| 525 | 207 { |
| 208 yyerror (&yylloc, conffile, "Not enough memory to store the configuration..."); | |
| 209 YYERROR; | |
| 210 } ); | |
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211 |
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212 new = &rtereg_conf[rtereg_conf_size-1].rules[rtereg_conf[rtereg_conf_size-1].rules_nb - 1]; |
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213 |
| 525 | 214 new->pattern = $1; |
| 215 new->server = $3; | |
| 216 new->score = $6; | |
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217 |
| 525 | 218 /* Attempt to compile the regex */ |
| 219 CHECK_FCT_DO( err=regcomp(&new->preg, new->pattern, REG_EXTENDED | REG_NOSUB), | |
| 220 { | |
| 221 char * buf; | |
| 222 size_t bl; | |
| 223 | |
| 224 /* Error while compiling the regex */ | |
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225 TRACE_DEBUG(INFO, "rt_ereg: error while compiling the regular expression '%s':", new->pattern); |
| 525 | 226 |
| 227 /* Get the error message size */ | |
| 228 bl = regerror(err, &new->preg, NULL, 0); | |
| 229 | |
| 230 /* Alloc the buffer for error message */ | |
| 231 CHECK_MALLOC( buf = malloc(bl) ); | |
| 232 | |
| 233 /* Get the error message content */ | |
| 234 regerror(err, &new->preg, buf, bl); | |
| 235 TRACE_DEBUG(INFO, "\t%s", buf); | |
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236 |
| 525 | 237 /* Free the buffer, return the error */ |
| 238 free(buf); | |
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239 |
| 525 | 240 yyerror (&yylloc, conffile, "Invalid regular expression."); |
| 241 YYERROR; | |
| 242 } ); | |
| 243 } | |
| 244 ; |