cel/cel_pgsql.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2008
   5  *
   6  * Steve Murphy - adapted to CEL, from:
   7  * Matthew D. Hardeman <mhardemn@papersoft.com>
   8  * Adapted from the MySQL CDR logger originally by James Sharp
   9  *
  10  * Modified April, 2007; Dec, 2008
  11  * Steve Murphy <murf@digium.com>
  12
  13  * Modified September 2003
  14  * Matthew D. Hardeman <mhardemn@papersoft.com>
  15  *
  16  * See http://www.asterisk.org for more information about
  17  * the Asterisk project. Please do not directly contact
  18  * any of the maintainers of this project for assistance;
  19  * the project provides a web site, mailing lists and IRC
  20  * channels for your use.
  21  *
  22  * This program is free software, distributed under the terms of
  23  * the GNU General Public License Version 2. See the LICENSE file
  24  * at the top of the source tree.
  25  */
  26
  27 /*! \file
  28  *
  29  * \brief PostgreSQL CEL logger
  30  *
  31  * \author Steve Murphy <murf@digium.com>
  32  * PostgreSQL http://www.postgresql.org/
  33  *
  34  * See also
  35  * \arg \ref Config_cel
  36  * PostgreSQL http://www.postgresql.org/
  37  * \ingroup cel_drivers
  38  */
  39
  40 /*** MODULEINFO
  41         <depend>pgsql</depend>
  42         <support_level>extended</support_level>
  43  ***/
  44
  45 #include "asterisk.h"
  46
  47 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  48
  49 #include <libpq-fe.h>
  50
  51 #include "asterisk/config.h"
  52 #include "asterisk/options.h"
  53 #include "asterisk/channel.h"
  54 #include "asterisk/cel.h"
  55 #include "asterisk/module.h"
  56 #include "asterisk/logger.h"
  57 #include "asterisk.h"
  58
  59 #define DATE_FORMAT "%Y-%m-%d %T.%6q"
  60
  61 #define PGSQL_BACKEND_NAME "CEL PGSQL backend"
  62
  63 static char *config = "cel_pgsql.conf";
  64 static char *pghostname = NULL, *pgdbname = NULL, *pgdbuser = NULL, *pgpassword = NULL, *pgdbport = NULL, *table = NULL;
  65 static int connected = 0;
  66 static int maxsize = 512, maxsize2 = 512;
  67
  68 /*! \brief show_user_def is off by default */
  69 #define CEL_SHOW_USERDEF_DEFAULT        0
  70
  71 /*! TRUE if we should set the eventtype field to USER_DEFINED on user events. */
  72 static unsigned char cel_show_user_def;
  73
  74 AST_MUTEX_DEFINE_STATIC(pgsql_lock);
  75
  76 static PGconn   *conn = NULL;
  77 static PGresult *result = NULL;
  78
  79 struct columns {
  80         char *name;
  81         char *type;
  82         int len;
  83         unsigned int notnull:1;
  84         unsigned int hasdefault:1;
  85         AST_RWLIST_ENTRY(columns) list;
  86 };
  87
  88 static AST_RWLIST_HEAD_STATIC(psql_columns, columns);
  89
  90 #define LENGTHEN_BUF1(size) \
  91         do { \
  92                 /* Lengthen buffer, if necessary */ \
  93                 if (ast_str_strlen(sql) + size + 1 > ast_str_size(sql)) { \
  94                         if (ast_str_make_space(&sql, ((ast_str_size(sql) + size + 3) / 512 + 1) * 512) != 0) { \
  95                                 ast_log(LOG_ERROR, "Unable to allocate sufficient memory.  Insert CDR failed.\n"); \
  96                                 ast_free(sql); \
  97                                 ast_free(sql2); \
  98                                 AST_RWLIST_UNLOCK(&psql_columns); \
  99                                 return; \
 100                         } \
 101                 } \
 102         } while (0)
 103
 104 #define LENGTHEN_BUF2(size) \
 105         do { \
 106                 if (ast_str_strlen(sql2) + size + 1 > ast_str_size(sql2)) { \
 107                         if (ast_str_make_space(&sql2, ((ast_str_size(sql2) + size + 3) / 512 + 1) * 512) != 0) { \
 108                                 ast_log(LOG_ERROR, "Unable to allocate sufficient memory.  Insert CDR failed.\n"); \
 109                                 ast_free(sql); \
 110                                 ast_free(sql2); \
 111                                 AST_RWLIST_UNLOCK(&psql_columns); \
 112                                 return; \
 113                         } \
 114                 } \
 115         } while (0)
 116
 117 static void pgsql_log(struct ast_event *event)
 118 {
 119         struct ast_tm tm;
 120         char timestr[128];
 121         char *pgerror;
 122         struct ast_cel_event_record record = {
 123                 .version = AST_CEL_EVENT_RECORD_VERSION,
 124         };
 125
 126         if (ast_cel_fill_record(event, &record)) {
 127                 return;
 128         }
 129
 130         ast_mutex_lock(&pgsql_lock);
 131
 132         ast_localtime(&record.event_time, &tm, NULL);
 133         ast_strftime(timestr, sizeof(timestr), DATE_FORMAT, &tm);
 134
 135         if ((!connected) && pghostname && pgdbuser && pgpassword && pgdbname) {
 136                 conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 137                 if (PQstatus(conn) != CONNECTION_BAD) {
 138                         connected = 1;
 139                 } else {
 140                         pgerror = PQerrorMessage(conn);
 141                         ast_log(LOG_ERROR, "cel_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
 142                         ast_log(LOG_ERROR, "cel_pgsql: Reason: %s\n", pgerror);
 143                         PQfinish(conn);
 144                         conn = NULL;
 145                 }
 146         }
 147         if (connected) {
 148                 struct columns *cur;
 149                 struct ast_str *sql = ast_str_create(maxsize), *sql2 = ast_str_create(maxsize2);
 150                 char buf[257], escapebuf[513];
 151                 const char *value;
 152                 int first = 1;
 153
 154                 if (!sql || !sql2) {
 155                         goto ast_log_cleanup;
 156                 }
 157
 158                 ast_str_set(&sql, 0, "INSERT INTO %s (", table);
 159                 ast_str_set(&sql2, 0, " VALUES (");
 160
 161 #define SEP (first ? "" : ",")
 162
 163                 AST_RWLIST_RDLOCK(&psql_columns);
 164                 AST_RWLIST_TRAVERSE(&psql_columns, cur, list) {
 165                         LENGTHEN_BUF1(strlen(cur->name) + 2);
 166                         ast_str_append(&sql, 0, "%s\"%s\"", first ? "" : ",", cur->name);
 167
 168                         if (strcmp(cur->name, "eventtime") == 0) {
 169                                 if (strncmp(cur->type, "int", 3) == 0) {
 170                                         LENGTHEN_BUF2(13);
 171                                         ast_str_append(&sql2, 0, "%s%ld", SEP, (long) record.event_time.tv_sec);
 172                                 } else if (strncmp(cur->type, "float", 5) == 0) {
 173                                         LENGTHEN_BUF2(31);
 174                                         ast_str_append(&sql2, 0, "%s%f",
 175                                                 SEP,
 176                                                 (double) record.event_time.tv_sec +
 177                                                 (double) record.event_time.tv_usec / 1000000.0);
 178                                 } else {
 179                                         /* char, hopefully */
 180                                         LENGTHEN_BUF2(31);
 181                                         ast_localtime(&record.event_time, &tm, NULL);
 182                                         ast_strftime(buf, sizeof(buf), DATE_FORMAT, &tm);
 183                                         ast_str_append(&sql2, 0, "%s'%s'", SEP, buf);
 184                                 }
 185                         } else if (strcmp(cur->name, "eventtype") == 0) {
 186                                 if (cur->type[0] == 'i') {
 187                                         /* Get integer, no need to escape anything */
 188                                         LENGTHEN_BUF2(5);
 189                                         ast_str_append(&sql2, 0, "%s%d", SEP, (int) record.event_type);
 190                                 } else if (strncmp(cur->type, "float", 5) == 0) {
 191                                         LENGTHEN_BUF2(31);
 192                                         ast_str_append(&sql2, 0, "%s%f", SEP, (double) record.event_type);
 193                                 } else {
 194                                         /* Char field, probably */
 195                                         const char *event_name;
 196
 197                                         event_name = (!cel_show_user_def
 198                                                 && record.event_type == AST_CEL_USER_DEFINED)
 199                                                 ? record.user_defined_name : record.event_name;
 200                                         LENGTHEN_BUF2(strlen(event_name) + 1);
 201                                         ast_str_append(&sql2, 0, "%s'%s'", SEP, event_name);
 202                                 }
 203                         } else if (strcmp(cur->name, "amaflags") == 0) {
 204                                 if (strncmp(cur->type, "int", 3) == 0) {
 205                                         /* Integer, no need to escape anything */
 206                                         LENGTHEN_BUF2(13);
 207                                         ast_str_append(&sql2, 0, "%s%d", SEP, record.amaflag);
 208                                 } else {
 209                                         /* Although this is a char field, there are no special characters in the values for these fields */
 210                                         LENGTHEN_BUF2(31);
 211                                         ast_str_append(&sql2, 0, "%s'%d'", SEP, record.amaflag);
 212                                 }
 213                         } else {
 214                                 /* Arbitrary field, could be anything */
 215                                 if (strcmp(cur->name, "userdeftype") == 0) {
 216                                         value = record.user_defined_name;
 217                                 } else if (strcmp(cur->name, "cid_name") == 0) {
 218                                         value = record.caller_id_name;
 219                                 } else if (strcmp(cur->name, "cid_num") == 0) {
 220                                         value = record.caller_id_num;
 221                                 } else if (strcmp(cur->name, "cid_ani") == 0) {
 222                                         value = record.caller_id_ani;
 223                                 } else if (strcmp(cur->name, "cid_rdnis") == 0) {
 224                                         value = record.caller_id_rdnis;
 225                                 } else if (strcmp(cur->name, "cid_dnid") == 0) {
 226                                         value = record.caller_id_dnid;
 227                                 } else if (strcmp(cur->name, "exten") == 0) {
 228                                         value = record.extension;
 229                                 } else if (strcmp(cur->name, "context") == 0) {
 230                                         value = record.context;
 231                                 } else if (strcmp(cur->name, "channame") == 0) {
 232                                         value = record.channel_name;
 233                                 } else if (strcmp(cur->name, "appname") == 0) {
 234                                         value = record.application_name;
 235                                 } else if (strcmp(cur->name, "appdata") == 0) {
 236                                         value = record.application_data;
 237                                 } else if (strcmp(cur->name, "accountcode") == 0) {
 238                                         value = record.account_code;
 239                                 } else if (strcmp(cur->name, "peeraccount") == 0) {
 240                                         value = record.peer_account;
 241                                 } else if (strcmp(cur->name, "uniqueid") == 0) {
 242                                         value = record.unique_id;
 243                                 } else if (strcmp(cur->name, "linkedid") == 0) {
 244                                         value = record.linked_id;
 245                                 } else if (strcmp(cur->name, "userfield") == 0) {
 246                                         value = record.user_field;
 247                                 } else if (strcmp(cur->name, "peer") == 0) {
 248                                         value = record.peer;
 249                                 } else if (strcmp(cur->name, "extra") == 0) {
 250                                         value = record.extra;
 251                                 } else {
 252                                         value = NULL;
 253                                 }
 254
 255                                 if (value == NULL) {
 256                                         ast_str_append(&sql2, 0, "%sDEFAULT", SEP);
 257                                 } else if (strncmp(cur->type, "int", 3) == 0) {
 258                                         long long whatever;
 259                                         if (value && sscanf(value, "%30lld", &whatever) == 1) {
 260                                                 LENGTHEN_BUF2(26);
 261                                                 ast_str_append(&sql2, 0, "%s%lld", SEP, whatever);
 262                                         } else {
 263                                                 LENGTHEN_BUF2(2);
 264                                                 ast_str_append(&sql2, 0, "%s0", SEP);
 265                                         }
 266                                 } else if (strncmp(cur->type, "float", 5) == 0) {
 267                                         long double whatever;
 268                                         if (value && sscanf(value, "%30Lf", &whatever) == 1) {
 269                                                 LENGTHEN_BUF2(51);
 270                                                 ast_str_append(&sql2, 0, "%s%30Lf", SEP, whatever);
 271                                         } else {
 272                                                 LENGTHEN_BUF2(2);
 273                                                 ast_str_append(&sql2, 0, "%s0", SEP);
 274                                         }
 275                                         /* XXX Might want to handle dates, times, and other misc fields here XXX */
 276                                 } else {
 277                                         if (value) {
 278                                                 PQescapeStringConn(conn, escapebuf, value, strlen(value), NULL);
 279                                         } else {
 280                                                 escapebuf[0] = '\0';
 281                                         }
 282                                         LENGTHEN_BUF2(strlen(escapebuf) + 3);
 283                                         ast_str_append(&sql2, 0, "%s'%s'", SEP, escapebuf);
 284                                 }
 285                         }
 286                         first = 0;
 287                 }
 288                 AST_RWLIST_UNLOCK(&psql_columns);
 289                 LENGTHEN_BUF1(ast_str_strlen(sql2) + 2);
 290                 ast_str_append(&sql, 0, ")%s)", ast_str_buffer(sql2));
 291                 ast_verb(11, "[%s]\n", ast_str_buffer(sql));
 292
 293                 ast_debug(2, "inserting a CEL record.\n");
 294                 /* Test to be sure we're still connected... */
 295                 /* If we're connected, and connection is working, good. */
 296                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
 297                 if (PQstatus(conn) == CONNECTION_OK) {
 298                         connected = 1;
 299                 } else {
 300                         ast_log(LOG_WARNING, "Connection was lost... attempting to reconnect.\n");
 301                         PQreset(conn);
 302                         if (PQstatus(conn) == CONNECTION_OK) {
 303                                 ast_log(LOG_NOTICE, "Connection reestablished.\n");
 304                                 connected = 1;
 305                         } else {
 306                                 pgerror = PQerrorMessage(conn);
 307                                 ast_log(LOG_ERROR, "Unable to reconnect to database server %s. Calls will not be logged!\n", pghostname);
 308                                 ast_log(LOG_ERROR, "Reason: %s\n", pgerror);
 309                                 PQfinish(conn);
 310                                 conn = NULL;
 311                                 connected = 0;
 312                                 goto ast_log_cleanup;
 313                         }
 314                 }
 315                 result = PQexec(conn, ast_str_buffer(sql));
 316                 if (PQresultStatus(result) != PGRES_COMMAND_OK) {
 317                         pgerror = PQresultErrorMessage(result);
 318                         ast_log(LOG_WARNING, "Failed to insert call detail record into database!\n");
 319                         ast_log(LOG_WARNING, "Reason: %s\n", pgerror);
 320                         ast_log(LOG_WARNING, "Connection may have been lost... attempting to reconnect.\n");
 321                         PQreset(conn);
 322                         if (PQstatus(conn) == CONNECTION_OK) {
 323                                 ast_log(LOG_NOTICE, "Connection reestablished.\n");
 324                                 connected = 1;
 325                                 PQclear(result);
 326                                 result = PQexec(conn, ast_str_buffer(sql));
 327                                 if (PQresultStatus(result) != PGRES_COMMAND_OK) {
 328                                         pgerror = PQresultErrorMessage(result);
 329                                         ast_log(LOG_ERROR, "HARD ERROR!  Attempted reconnection failed.  DROPPING CALL RECORD!\n");
 330                                         ast_log(LOG_ERROR, "Reason: %s\n", pgerror);
 331                                 }
 332                         }
 333                         PQclear(result);
 334                         goto ast_log_cleanup;
 335                 }
 336                 PQclear(result);
 337
 338 ast_log_cleanup:
 339                 ast_free(sql);
 340                 ast_free(sql2);
 341         }
 342
 343         ast_mutex_unlock(&pgsql_lock);
 344 }
 345
 346 static int my_unload_module(void)
 347 {
 348         struct columns *current;
 349
 350         ast_cel_backend_unregister(PGSQL_BACKEND_NAME);
 351         AST_RWLIST_WRLOCK(&psql_columns);
 352         if (conn) {
 353                 PQfinish(conn);
 354                 conn = NULL;
 355         }
 356         if (pghostname) {
 357                 ast_free(pghostname);
 358                 pghostname = NULL;
 359         }
 360         if (pgdbname) {
 361                 ast_free(pgdbname);
 362                 pgdbname = NULL;
 363         }
 364         if (pgdbuser) {
 365                 ast_free(pgdbuser);
 366                 pgdbuser = NULL;
 367         }
 368         if (pgpassword) {
 369                 ast_free(pgpassword);
 370                 pgpassword = NULL;
 371         }
 372         if (pgdbport) {
 373                 ast_free(pgdbport);
 374                 pgdbport = NULL;
 375         }
 376         if (table) {
 377                 ast_free(table);
 378                 table = NULL;
 379         }
 380         while ((current = AST_RWLIST_REMOVE_HEAD(&psql_columns, list))) {
 381                 ast_free(current);
 382         }
 383         AST_RWLIST_UNLOCK(&psql_columns);
 384         return 0;
 385 }
 386
 387 static int unload_module(void)
 388 {
 389         return my_unload_module();
 390 }
 391
 392 static int process_my_load_module(struct ast_config *cfg)
 393 {
 394         struct ast_variable *var;
 395         char *pgerror;
 396         const char *tmp;
 397         PGresult *result;
 398         struct columns *cur;
 399
 400         if (!(var = ast_variable_browse(cfg, "global"))) {
 401                 ast_log(LOG_WARNING,"CEL pgsql config file missing global section.\n");
 402                 return AST_MODULE_LOAD_DECLINE;
 403         }
 404         if (!(tmp = ast_variable_retrieve(cfg,"global","hostname"))) {
 405                 ast_log(LOG_WARNING,"PostgreSQL server hostname not specified.  Assuming unix socket connection\n");
 406                 tmp = "";       /* connect via UNIX-socket by default */
 407         }
 408         if (pghostname)
 409                 ast_free(pghostname);
 410         if (!(pghostname = ast_strdup(tmp))) {
 411                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying host info\n");
 412                 return AST_MODULE_LOAD_DECLINE;
 413         }
 414         if (!(tmp = ast_variable_retrieve(cfg, "global", "dbname"))) {
 415                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asterisk\n");
 416                 tmp = "asteriskceldb";
 417         }
 418         if (pgdbname)
 419                 ast_free(pgdbname);
 420         if (!(pgdbname = ast_strdup(tmp))) {
 421                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying dbname info\n");
 422                 return AST_MODULE_LOAD_DECLINE;
 423         }
 424         if (!(tmp = ast_variable_retrieve(cfg, "global", "user"))) {
 425                 ast_log(LOG_WARNING,"PostgreSQL database user not specified.  Assuming asterisk\n");
 426                 tmp = "asterisk";
 427         }
 428         if (pgdbuser)
 429                 ast_free(pgdbuser);
 430         if (!(pgdbuser = ast_strdup(tmp))) {
 431                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying user info\n");
 432                 return AST_MODULE_LOAD_DECLINE;
 433         }
 434         if (!(tmp = ast_variable_retrieve(cfg, "global", "password"))) {
 435                 ast_log(LOG_WARNING, "PostgreSQL database password not specified.  Assuming blank\n");
 436                 tmp = "";
 437         }
 438         if (pgpassword)
 439                 ast_free(pgpassword);
 440         if (!(pgpassword = ast_strdup(tmp))) {
 441                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying password info\n");
 442                 return AST_MODULE_LOAD_DECLINE;
 443         }
 444         if (!(tmp = ast_variable_retrieve(cfg,"global","port"))) {
 445                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default 5432.\n");
 446                 tmp = "5432";
 447         }
 448         if (pgdbport)
 449                 ast_free(pgdbport);
 450         if (!(pgdbport = ast_strdup(tmp))) {
 451                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying port info\n");
 452                 return AST_MODULE_LOAD_DECLINE;
 453         }
 454         if (!(tmp = ast_variable_retrieve(cfg, "global", "table"))) {
 455                 ast_log(LOG_WARNING,"CEL table not specified.  Assuming cel\n");
 456                 tmp = "cel";
 457         }
 458         if (table)
 459                 ast_free(table);
 460         if (!(table = ast_strdup(tmp))) {
 461                 return AST_MODULE_LOAD_DECLINE;
 462         }
 463         cel_show_user_def = CEL_SHOW_USERDEF_DEFAULT;
 464         if ((tmp = ast_variable_retrieve(cfg, "global", "show_user_defined"))) {
 465                 cel_show_user_def = ast_true(tmp) ? 1 : 0;
 466         }
 467         if (option_debug) {
 468                 if (ast_strlen_zero(pghostname)) {
 469                         ast_debug(3, "cel_pgsql: using default unix socket\n");
 470                 } else {
 471                         ast_debug(3, "cel_pgsql: got hostname of %s\n", pghostname);
 472                 }
 473                 ast_debug(3, "cel_pgsql: got port of %s\n", pgdbport);
 474                 ast_debug(3, "cel_pgsql: got user of %s\n", pgdbuser);
 475                 ast_debug(3, "cel_pgsql: got dbname of %s\n", pgdbname);
 476                 ast_debug(3, "cel_pgsql: got password of %s\n", pgpassword);
 477                 ast_debug(3, "cel_pgsql: got sql table name of %s\n", table);
 478                 ast_debug(3, "cel_pgsql: got show_user_defined of %s\n",
 479                         cel_show_user_def ? "Yes" : "No");
 480         }
 481
 482         conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 483         if (PQstatus(conn) != CONNECTION_BAD) {
 484                 char sqlcmd[512];
 485                 char *fname, *ftype, *flen, *fnotnull, *fdef;
 486                 char *tableptr;
 487                 int i, rows;
 488
 489                 ast_debug(1, "Successfully connected to PostgreSQL database.\n");
 490                 connected = 1;
 491
 492                 /* Remove any schema name from the table */
 493                 if ((tableptr = strrchr(table, '.'))) {
 494                         tableptr++;
 495                 } else {
 496                         tableptr = table;
 497                 }
 498
 499                 /* Query the columns */
 500                 snprintf(sqlcmd, sizeof(sqlcmd), "select a.attname, t.typname, a.attlen, a.attnotnull, d.adsrc from pg_class c, pg_type t, pg_attribute a left outer join pg_attrdef d on a.atthasdef and d.adrelid = a.attrelid and d.adnum = a.attnum where c.oid = a.attrelid and a.atttypid = t.oid and (a.attnum > 0) and c.relname = '%s' order by c.relname, attnum", tableptr);
 501                 result = PQexec(conn, sqlcmd);
 502                 if (PQresultStatus(result) != PGRES_TUPLES_OK) {
 503                         pgerror = PQresultErrorMessage(result);
 504                         ast_log(LOG_ERROR, "Failed to query database columns: %s\n", pgerror);
 505                         PQclear(result);
 506                         unload_module();
 507                         return AST_MODULE_LOAD_DECLINE;
 508                 }
 509
 510                 rows = PQntuples(result);
 511                 for (i = 0; i < rows; i++) {
 512                         fname = PQgetvalue(result, i, 0);
 513                         ftype = PQgetvalue(result, i, 1);
 514                         flen = PQgetvalue(result, i, 2);
 515                         fnotnull = PQgetvalue(result, i, 3);
 516                         fdef = PQgetvalue(result, i, 4);
 517                         ast_verb(4, "Found column '%s' of type '%s'\n", fname, ftype);
 518                         cur = ast_calloc(1, sizeof(*cur) + strlen(fname) + strlen(ftype) + 2);
 519                         if (cur) {
 520                                 sscanf(flen, "%30d", &cur->len);
 521                                 cur->name = (char *)cur + sizeof(*cur);
 522                                 cur->type = (char *)cur + sizeof(*cur) + strlen(fname) + 1;
 523                                 strcpy(cur->name, fname);
 524                                 strcpy(cur->type, ftype);
 525                                 if (*fnotnull == 't') {
 526                                         cur->notnull = 1;
 527                                 } else {
 528                                         cur->notnull = 0;
 529                                 }
 530                                 if (!ast_strlen_zero(fdef)) {
 531                                         cur->hasdefault = 1;
 532                                 } else {
 533                                         cur->hasdefault = 0;
 534                                 }
 535                                 AST_RWLIST_INSERT_TAIL(&psql_columns, cur, list);
 536                         }
 537                 }
 538                 PQclear(result);
 539         } else {
 540                 pgerror = PQerrorMessage(conn);
 541                 ast_log(LOG_ERROR, "cel_pgsql: Unable to connect to database server %s.  CALLS WILL NOT BE LOGGED!!\n", pghostname);
 542                 ast_log(LOG_ERROR, "cel_pgsql: Reason: %s\n", pgerror);
 543                 connected = 0;
 544         }
 545         return AST_MODULE_LOAD_SUCCESS;
 546 }
 547
 548 static int my_load_module(int reload)
 549 {
 550         struct ast_config *cfg;
 551         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
 552
 553         if ((cfg = ast_config_load(config, config_flags)) == NULL || cfg == CONFIG_STATUS_FILEINVALID) {
 554                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CEL's: %s\n", config);
 555                 return AST_MODULE_LOAD_DECLINE;
 556         } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
 557                 return AST_MODULE_LOAD_SUCCESS;
 558         }
 559
 560         if (reload) {
 561                 my_unload_module();
 562         }
 563
 564         process_my_load_module(cfg);
 565         ast_config_destroy(cfg);
 566
 567         if (ast_cel_backend_register(PGSQL_BACKEND_NAME, pgsql_log)) {
 568                 ast_log(LOG_WARNING, "Unable to subscribe to CEL events for pgsql\n");
 569                 return AST_MODULE_LOAD_DECLINE;
 570         }
 571
 572         return AST_MODULE_LOAD_SUCCESS;
 573 }
 574
 575 static int load_module(void)
 576 {
 577         return my_load_module(0);
 578 }
 579
 580 static int reload(void)
 581 {
 582         return my_load_module(1);
 583 }
 584
 585 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "PostgreSQL CEL Backend",
 586         .load = load_module,
 587         .unload = unload_module,
 588         .reload = reload,
 589         .load_pri = AST_MODPRI_CDR_DRIVER,
 590 );