cdr/cdr_pgsql.c

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * PostgreSQL CDR logger
   5  *
   6  * Matthew D. Hardeman <mhardemn@papersoft.com>
   7  * Adapted from the MySQL CDR logger originally by James Sharp
   8  *
   9  * Modified September 2003
  10  * Matthew D. Hardeman <mhardemn@papersoft.com>
  11  *
  12  * This program is free software, distributed under the terms of
  13  * the GNU General Public License.
  14  *
  15  */
  16
  17 #include <sys/types.h>
  18 #include <asterisk/config.h>
  19 #include <asterisk/options.h>
  20 #include <asterisk/channel.h>
  21 #include <asterisk/cdr.h>
  22 #include <asterisk/module.h>
  23 #include <asterisk/logger.h>
  24 #include "../asterisk.h"
  25
  26 #include <stdio.h>
  27 #include <string.h>
  28
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <time.h>
  32
  33 #include <libpq-fe.h>
  34
  35 #define DATE_FORMAT "%Y-%m-%d %T"
  36
  37 static char *desc = "PostgreSQL CDR Backend";
  38 static char *name = "pgsql";
  39 static char *config = "cdr_pgsql.conf";
  40 static char *pghostname = NULL, *pgdbname = NULL, *pgdbuser = NULL, *pgpassword = NULL, *pgdbsock = NULL, *pgdbport = NULL, *table = NULL;
  41 static int hostname_alloc = 0, dbname_alloc = 0, dbuser_alloc = 0, password_alloc = 0, dbsock_alloc = 0, dbport_alloc = 0, table_alloc = 0;
  42 static int connected = 0;
  43
  44 AST_MUTEX_DEFINE_STATIC(pgsql_lock);
  45
  46 PGconn          *conn;
  47 PGresult        *result;
  48
  49 static int pgsql_log(struct ast_cdr *cdr)
  50 {
  51         struct tm tm;
  52         char sqlcmd[2048] = "", timestr[128];
  53         char *pgerror;
  54
  55         ast_mutex_lock(&pgsql_lock);
  56
  57         localtime_r(&cdr->start.tv_sec,&tm);
  58         strftime(timestr, sizeof(timestr), DATE_FORMAT, &tm);
  59
  60         if ((!connected) && pghostname && pgdbuser && pgpassword && pgdbname) {
  61                 conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
  62                 if (PQstatus(conn) != CONNECTION_BAD) {
  63                         connected = 1;
  64                 } else {
  65                         pgerror = PQerrorMessage(conn);
  66                         ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
  67                         ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
  68                 }
  69         }
  70
  71         if (connected) {
  72                 char *clid=NULL, *dcontext=NULL, *channel=NULL, *dstchannel=NULL, *lastapp=NULL, *lastdata=NULL;
  73                 char *uniqueid=NULL, *userfield=NULL;
  74
  75                 /* Maximum space needed would be if all characters needed to be escaped, plus a trailing NULL */
  76                 if ((clid = alloca(strlen(cdr->clid) * 2 + 1)) != NULL)
  77                         PQescapeString(clid, cdr->clid, strlen(cdr->clid));
  78                 if ((dcontext = alloca(strlen(cdr->dcontext) * 2 + 1)) != NULL)
  79                         PQescapeString(dcontext, cdr->dcontext, strlen(cdr->dcontext));
  80                 if ((channel = alloca(strlen(cdr->channel) * 2 + 1)) != NULL)
  81                         PQescapeString(channel, cdr->channel, strlen(cdr->channel));
  82                 if ((dstchannel = alloca(strlen(cdr->dstchannel) * 2 + 1)) != NULL)
  83                         PQescapeString(dstchannel, cdr->dstchannel, strlen(cdr->dstchannel));
  84                 if ((lastapp = alloca(strlen(cdr->lastapp) * 2 + 1)) != NULL)
  85                         PQescapeString(lastapp, cdr->lastapp, strlen(cdr->lastapp));
  86                 if ((lastdata = alloca(strlen(cdr->lastdata) * 2 + 1)) != NULL)
  87                         PQescapeString(lastdata, cdr->lastdata, strlen(cdr->lastdata));
  88                 if ((uniqueid = alloca(strlen(cdr->uniqueid) * 2 + 1)) != NULL)
  89                         PQescapeString(uniqueid, cdr->uniqueid, strlen(cdr->uniqueid));
  90                 if ((userfield = alloca(strlen(cdr->userfield) * 2 + 1)) != NULL)
  91                         PQescapeString(userfield, cdr->userfield, strlen(cdr->userfield));
  92
  93                 /* Check for all alloca failures above at once */
  94                 if ((!clid) || (!dcontext) || (!channel) || (!dstchannel) || (!lastapp) || (!lastdata) || (!uniqueid) || (!userfield)) {
  95                         ast_log(LOG_ERROR, "cdr_pgsql:  Out of memory error (insert fails)\n");
  96                         ast_mutex_unlock(&pgsql_lock);
  97                         return -1;
  98                 }
  99
 100                 ast_log(LOG_DEBUG,"cdr_pgsql: inserting a CDR record.\n");
 101
 102                 snprintf(sqlcmd,sizeof(sqlcmd),"INSERT INTO %s (calldate,clid,src,dst,dcontext,channel,dstchannel,"
 103                                  "lastapp,lastdata,duration,billsec,disposition,amaflags,accountcode,uniqueid,userfield) VALUES"
 104                                  " ('%s','%s','%s','%s','%s', '%s','%s','%s','%s',%i,%i,'%s',%i,'%s','%s','%s')",
 105                                  table,timestr,clid,cdr->src, cdr->dst, dcontext,channel, dstchannel, lastapp, lastdata,
 106                                  cdr->duration,cdr->billsec,ast_cdr_disp2str(cdr->disposition),cdr->amaflags, cdr->accountcode, uniqueid, userfield);
 107
 108                 ast_log(LOG_DEBUG,"cdr_pgsql: SQL command executed:  %s\n",sqlcmd);
 109
 110                 /* Test to be sure we're still connected... */
 111                 /* If we're connected, and connection is working, good. */
 112                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
 113                 if (PQstatus(conn) == CONNECTION_OK) {
 114                         connected = 1;
 115                 } else {
 116                         ast_log(LOG_ERROR, "cdr_pgsql: Connection was lost... attempting to reconnect.\n");
 117                         PQreset(conn);
 118                         if (PQstatus(conn) == CONNECTION_OK) {
 119                                 ast_log(LOG_ERROR, "cdr_pgsql: Connection reestablished.\n");
 120                                 connected = 1;
 121                         } else {
 122                                 pgerror = PQerrorMessage(conn);
 123                                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to reconnect to database server %s. Calls will not be logged!\n", pghostname);
 124                                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 125                                 connected = 0;
 126                                 ast_mutex_unlock(&pgsql_lock);
 127                                 return -1;
 128                         }
 129                 }
 130                 result = PQexec(conn, sqlcmd);
 131                 if ( PQresultStatus(result) != PGRES_COMMAND_OK) {
 132                         pgerror = PQresultErrorMessage(result);
 133                         ast_log(LOG_ERROR,"cdr_pgsql: Failed to insert call detail record into database!\n");
 134                         ast_log(LOG_ERROR,"cdr_pgsql: Reason: %s\n", pgerror);
 135                         ast_mutex_unlock(&pgsql_lock);
 136                         return -1;
 137                 }
 138         }
 139         ast_mutex_unlock(&pgsql_lock);
 140         return 0;
 141 }
 142
 143 char *description(void)
 144 {
 145         return desc;
 146 }
 147
 148 static int my_unload_module(void)
 149 {
 150         if (conn)
 151                 PQfinish(conn);
 152         conn = NULL;
 153         connected = 0;
 154         if (pghostname && hostname_alloc) {
 155                 free(pghostname);
 156                 pghostname = NULL;
 157                 hostname_alloc = 0;
 158         }
 159         if (pgdbname && dbname_alloc) {
 160                 free(pgdbname);
 161                 pgdbname = NULL;
 162                 dbname_alloc = 0;
 163         }
 164         if (pgdbuser && dbuser_alloc) {
 165                 free(pgdbuser);
 166                 pgdbuser = NULL;
 167                 dbuser_alloc = 0;
 168         }
 169         if (pgdbsock && dbsock_alloc) {
 170                 free(pgdbsock);
 171                 pgdbsock = NULL;
 172                 dbsock_alloc = 0;
 173         }
 174         if (pgpassword && password_alloc) {
 175                 free(pgpassword);
 176                 pgpassword = NULL;
 177                 password_alloc = 0;
 178         }
 179         if (pgdbport && dbport_alloc) {
 180                 free(pgdbport);
 181                 pgdbport = NULL;
 182                 dbport_alloc = 0;
 183         }
 184         if (table && table_alloc) {
 185                 free(table);
 186                 table = NULL;
 187                 table_alloc = 0;
 188         }
 189         ast_cdr_unregister(name);
 190         return 0;
 191 }
 192
 193 static int process_my_load_module(struct ast_config *cfg)
 194 {
 195         int res;
 196         struct ast_variable *var;
 197         char *pgerror;
 198         char *tmp;
 199
 200         var = ast_variable_browse(cfg, "global");
 201         if (!var) {
 202                 /* nothing configured */
 203                 return 0;
 204         }
 205
 206         tmp = ast_variable_retrieve(cfg,"global","hostname");
 207         if (tmp) {
 208                 pghostname = malloc(strlen(tmp) + 1);
 209                 if (pghostname != NULL) {
 210                         memset(pghostname, 0, strlen(tmp) + 1);
 211                         hostname_alloc = 1;
 212                         strncpy(pghostname, tmp, strlen(tmp));
 213                 } else {
 214                         ast_log(LOG_ERROR,"Out of memory error.\n");
 215                         return -1;
 216                 }
 217         } else {
 218                 ast_log(LOG_WARNING,"PostgreSQL server hostname not specified.  Assuming localhost\n");
 219                 pghostname = "localhost";
 220         }
 221
 222         tmp = ast_variable_retrieve(cfg,"global","dbname");
 223         if (tmp) {
 224                 pgdbname = malloc(strlen(tmp) + 1);
 225                 if (pgdbname != NULL) {
 226                         memset(pgdbname, 0, strlen(tmp) + 1);
 227                         dbname_alloc = 1;
 228                         strncpy(pgdbname, tmp, strlen(tmp));
 229                 } else {
 230                         ast_log(LOG_ERROR,"Out of memory error.\n");
 231                         return -1;
 232                 }
 233         } else {
 234                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asterisk\n");
 235                 pgdbname = "asteriskcdrdb";
 236         }
 237
 238         tmp = ast_variable_retrieve(cfg,"global","user");
 239         if (tmp) {
 240                 pgdbuser = malloc(strlen(tmp) + 1);
 241                 if (pgdbuser != NULL) {
 242                         memset(pgdbuser, 0, strlen(tmp) + 1);
 243                         dbuser_alloc = 1;
 244                         strncpy(pgdbuser, tmp, strlen(tmp));
 245                 } else {
 246                         ast_log(LOG_ERROR,"Out of memory error.\n");
 247                         return -1;
 248                 }
 249         } else {
 250                 ast_log(LOG_WARNING,"PostgreSQL database user not specified.  Assuming root\n");
 251                 pgdbuser = "root";
 252         }
 253
 254         tmp = ast_variable_retrieve(cfg,"global","password");
 255         if (tmp) {
 256                 pgpassword = malloc(strlen(tmp) + 1);
 257                 if (pgpassword != NULL) {
 258                         memset(pgpassword, 0, strlen(tmp) + 1);
 259                         password_alloc = 1;
 260                         strncpy(pgpassword, tmp, strlen(tmp));
 261                 } else {
 262                         ast_log(LOG_ERROR,"Out of memory error.\n");
 263                         return -1;
 264                 }
 265         } else {
 266                 ast_log(LOG_WARNING,"PostgreSQL database password not specified.  Assuming blank\n");
 267                 pgpassword = "";
 268         }
 269
 270         tmp = ast_variable_retrieve(cfg,"global","port");
 271         if (tmp) {
 272                 pgdbport = malloc(strlen(tmp) + 1);
 273                 if (pgdbport != NULL) {
 274                         memset(pgdbport, 0, strlen(tmp) + 1);
 275                         dbport_alloc = 1;
 276                         strncpy(pgdbport, tmp, strlen(tmp));
 277                 } else {
 278                         ast_log(LOG_ERROR,"Out of memory error.\n");
 279                         return -1;
 280                 }
 281         } else {
 282                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default 5432.\n");
 283                 pgdbport = "5432";
 284         }
 285         /* Loading stuff for table name */
 286         tmp = ast_variable_retrieve(cfg,"global","table");
 287         if (tmp) {
 288                 table = malloc(strlen(tmp) + 1);
 289                 if (table != NULL) {
 290                         memset(table, 0, strlen(tmp) + 1);
 291                         table_alloc = 1;
 292                         strncpy(table, tmp, strlen(tmp));
 293                 } else {
 294                         ast_log(LOG_ERROR,"Out of memory error.\n");
 295                         return -1;
 296                 }
 297         } else {
 298                 ast_log(LOG_WARNING,"CDR table not specified.  Assuming cdr\n");
 299                 table = "cdr";
 300         }
 301
 302         ast_log(LOG_DEBUG,"cdr_pgsql: got hostname of %s\n",pghostname);
 303         ast_log(LOG_DEBUG,"cdr_pgsql: got port of %s\n",pgdbport);
 304         if (pgdbsock)
 305                 ast_log(LOG_DEBUG,"cdr_pgsql: got sock file of %s\n",pgdbsock);
 306         ast_log(LOG_DEBUG,"cdr_pgsql: got user of %s\n",pgdbuser);
 307         ast_log(LOG_DEBUG,"cdr_pgsql: got dbname of %s\n",pgdbname);
 308         ast_log(LOG_DEBUG,"cdr_pgsql: got password of %s\n",pgpassword);
 309         ast_log(LOG_DEBUG,"cdr_pgsql: got sql table name of %s\n",table);
 310
 311         conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 312         if (PQstatus(conn) != CONNECTION_BAD) {
 313                 ast_log(LOG_DEBUG,"Successfully connected to PostgreSQL database.\n");
 314                 connected = 1;
 315         } else {
 316                 pgerror = PQerrorMessage(conn);
 317                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
 318                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 319                 connected = 0;
 320         }
 321
 322         res = ast_cdr_register(name, desc, pgsql_log);
 323         if (res) {
 324                 ast_log(LOG_ERROR, "Unable to register PGSQL CDR handling\n");
 325         }
 326         return res;
 327 }
 328
 329 static int my_load_module(void)
 330 {
 331         struct ast_config *cfg;
 332         int res;
 333         cfg = ast_load(config);
 334         if (!cfg) {
 335                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CDR's: %s\n", config);
 336                 return 0;
 337         }
 338         res = process_my_load_module(cfg);
 339         ast_destroy(cfg);
 340         return res;
 341 }
 342
 343 int load_module(void)
 344 {
 345         return my_load_module();
 346 }
 347
 348 int unload_module(void)
 349 {
 350         return my_unload_module();
 351 }
 352
 353 int reload(void)
 354 {
 355         my_unload_module();
 356         return my_load_module();
 357 }
 358
 359 int usecount(void)
 360 {
 361         /* To be able to unload the module */
 362         if ( ast_mutex_trylock(&pgsql_lock) ) {
 363                 return 1;
 364         } else {
 365                 ast_mutex_unlock(&pgsql_lock);
 366                 return 0;
 367         }
 368 }
 369
 370 char *key()
 371 {
 372         return ASTERISK_GPL_KEY;
 373 }