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;
  41 static int hostname_alloc = 0, dbname_alloc = 0, dbuser_alloc = 0, password_alloc = 0, dbsock_alloc = 0, dbport_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 cdr (calldate,clid,src,dst,dcontext,channel,dstchannel,lastapp,lastdata,duration,billsec,disposition,amaflags,accountcode,uniqueid,userfield) VALUES ('%s','%s','%s','%s','%s', '%s','%s','%s','%s',%i,%i,'%s',%i,'%s','%s','%s')",timestr,clid,cdr->src, cdr->dst, dcontext,channel, dstchannel, lastapp, lastdata,cdr->duration,cdr->billsec,ast_cdr_disp2str(cdr->disposition),cdr->amaflags, cdr->accountcode, uniqueid, userfield);
 103                 ast_log(LOG_DEBUG,"cdr_pgsql: SQL command executed:  %s\n",sqlcmd);
 104
 105                 /* Test to be sure we're still connected... */
 106                 /* If we're connected, and connection is working, good. */
 107                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
 108                 if (PQstatus(conn) == CONNECTION_OK) {
 109                         connected = 1;
 110                 } else {
 111                         ast_log(LOG_ERROR, "cdr_pgsql: Connection was lost... attempting to reconnect.\n");
 112                         PQreset(conn);
 113                         if (PQstatus(conn) == CONNECTION_OK) {
 114                                 ast_log(LOG_ERROR, "cdr_pgsql: Connection reestablished.\n");
 115                                 connected = 1;
 116                         } else {
 117                                 pgerror = PQerrorMessage(conn);
 118                                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to reconnect to database server %s. Calls will not be logged!\n", pghostname);
 119                                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 120                                 connected = 0;
 121                                 ast_mutex_unlock(&pgsql_lock);
 122                                 return -1;
 123                         }
 124                 }
 125                 result = PQexec(conn, sqlcmd);
 126                 if ( PQresultStatus(result) != PGRES_COMMAND_OK) {
 127                         pgerror = PQresultErrorMessage(result);
 128                         ast_log(LOG_ERROR,"cdr_pgsql: Failed to insert call detail record into database!\n");
 129                         ast_log(LOG_ERROR,"cdr_pgsql: Reason: %s\n", pgerror);
 130                         ast_mutex_unlock(&pgsql_lock);
 131                         return -1;
 132                 }
 133         }
 134         ast_mutex_unlock(&pgsql_lock);
 135         return 0;
 136 }
 137
 138 char *description(void)
 139 {
 140         return desc;
 141 }
 142
 143 static int my_unload_module(void)
 144 {
 145         if (conn)
 146                 PQfinish(conn);
 147         conn = NULL;
 148         connected = 0;
 149         if (pghostname && hostname_alloc) {
 150                 free(pghostname);
 151                 pghostname = NULL;
 152                 hostname_alloc = 0;
 153         }
 154         if (pgdbname && dbname_alloc) {
 155                 free(pgdbname);
 156                 pgdbname = NULL;
 157                 dbname_alloc = 0;
 158         }
 159         if (pgdbuser && dbuser_alloc) {
 160                 free(pgdbuser);
 161                 pgdbuser = NULL;
 162                 dbuser_alloc = 0;
 163         }
 164         if (pgdbsock && dbsock_alloc) {
 165                 free(pgdbsock);
 166                 pgdbsock = NULL;
 167                 dbsock_alloc = 0;
 168         }
 169         if (pgpassword && password_alloc) {
 170                 free(pgpassword);
 171                 pgpassword = NULL;
 172                 password_alloc = 0;
 173         }
 174         if (pgdbport && dbport_alloc) {
 175                 free(pgdbport);
 176                 pgdbport = NULL;
 177                 dbport_alloc = 0;
 178         }
 179         ast_cdr_unregister(name);
 180         return 0;
 181 }
 182
 183 static int process_my_load_module(struct ast_config *cfg)
 184 {
 185         int res;
 186         struct ast_variable *var;
 187         char *pgerror;
 188         char *tmp;
 189
 190         var = ast_variable_browse(cfg, "global");
 191         if (!var) {
 192                 /* nothing configured */
 193                 return 0;
 194         }
 195
 196         tmp = ast_variable_retrieve(cfg,"global","hostname");
 197         if (tmp) {
 198                 pghostname = malloc(strlen(tmp) + 1);
 199                 if (pghostname != NULL) {
 200                         memset(pghostname, 0, strlen(tmp) + 1);
 201                         hostname_alloc = 1;
 202                         strncpy(pghostname, tmp, strlen(tmp));
 203                 } else {
 204                         ast_log(LOG_ERROR,"Out of memory error.\n");
 205                         return -1;
 206                 }
 207         } else {
 208                 ast_log(LOG_WARNING,"PostgreSQL server hostname not specified.  Assuming localhost\n");
 209                 pghostname = "localhost";
 210         }
 211
 212         tmp = ast_variable_retrieve(cfg,"global","dbname");
 213         if (tmp) {
 214                 pgdbname = malloc(strlen(tmp) + 1);
 215                 if (pgdbname != NULL) {
 216                         memset(pgdbname, 0, strlen(tmp) + 1);
 217                         dbname_alloc = 1;
 218                         strncpy(pgdbname, tmp, strlen(tmp));
 219                 } else {
 220                         ast_log(LOG_ERROR,"Out of memory error.\n");
 221                         return -1;
 222                 }
 223         } else {
 224                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asterisk\n");
 225                 pgdbname = "asteriskcdrdb";
 226         }
 227
 228         tmp = ast_variable_retrieve(cfg,"global","user");
 229         if (tmp) {
 230                 pgdbuser = malloc(strlen(tmp) + 1);
 231                 if (pgdbuser != NULL) {
 232                         memset(pgdbuser, 0, strlen(tmp) + 1);
 233                         dbuser_alloc = 1;
 234                         strncpy(pgdbuser, tmp, strlen(tmp));
 235                 } else {
 236                         ast_log(LOG_ERROR,"Out of memory error.\n");
 237                         return -1;
 238                 }
 239         } else {
 240                 ast_log(LOG_WARNING,"PostgreSQL database user not specified.  Assuming root\n");
 241                 pgdbuser = "root";
 242         }
 243
 244         tmp = ast_variable_retrieve(cfg,"global","password");
 245         if (tmp) {
 246                 pgpassword = malloc(strlen(tmp) + 1);
 247                 if (pgpassword != NULL) {
 248                         memset(pgpassword, 0, strlen(tmp) + 1);
 249                         password_alloc = 1;
 250                         strncpy(pgpassword, tmp, strlen(tmp));
 251                 } else {
 252                         ast_log(LOG_ERROR,"Out of memory error.\n");
 253                         return -1;
 254                 }
 255         } else {
 256                 ast_log(LOG_WARNING,"PostgreSQL database password not specified.  Assuming blank\n");
 257                 pgpassword = "";
 258         }
 259
 260         tmp = ast_variable_retrieve(cfg,"global","port");
 261         if (tmp) {
 262                 pgdbport = malloc(strlen(tmp) + 1);
 263                 if (pgdbport != NULL) {
 264                         memset(pgdbport, 0, strlen(tmp) + 1);
 265                         dbport_alloc = 1;
 266                         strncpy(pgdbport, tmp, strlen(tmp));
 267                 } else {
 268                         ast_log(LOG_ERROR,"Out of memory error.\n");
 269                         return -1;
 270                 }
 271         } else {
 272                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default 5432.\n");
 273                 pgdbport = "5432";
 274         }
 275
 276         ast_log(LOG_DEBUG,"cdr_pgsql: got hostname of %s\n",pghostname);
 277         ast_log(LOG_DEBUG,"cdr_pgsql: got port of %s\n",pgdbport);
 278         if (pgdbsock)
 279                 ast_log(LOG_DEBUG,"cdr_pgsql: got sock file of %s\n",pgdbsock);
 280         ast_log(LOG_DEBUG,"cdr_pgsql: got user of %s\n",pgdbuser);
 281         ast_log(LOG_DEBUG,"cdr_pgsql: got dbname of %s\n",pgdbname);
 282         ast_log(LOG_DEBUG,"cdr_pgsql: got password of %s\n",pgpassword);
 283
 284         conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 285         if (PQstatus(conn) != CONNECTION_BAD) {
 286                 ast_log(LOG_DEBUG,"Successfully connected to PostgreSQL database.\n");
 287                 connected = 1;
 288         } else {
 289                 pgerror = PQerrorMessage(conn);
 290                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
 291                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 292                 connected = 0;
 293         }
 294
 295         res = ast_cdr_register(name, desc, pgsql_log);
 296         if (res) {
 297                 ast_log(LOG_ERROR, "Unable to register PGSQL CDR handling\n");
 298         }
 299         return res;
 300 }
 301
 302 static int my_load_module(void)
 303 {
 304         struct ast_config *cfg;
 305         int res;
 306         cfg = ast_load(config);
 307         if (!cfg) {
 308                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CDR's: %s\n", config);
 309                 return 0;
 310         }
 311         res = process_my_load_module(cfg);
 312         ast_destroy(cfg);
 313         return res;
 314 }
 315
 316 int load_module(void)
 317 {
 318         return my_load_module();
 319 }
 320
 321 int unload_module(void)
 322 {
 323         return my_unload_module();
 324 }
 325
 326 int reload(void)
 327 {
 328         my_unload_module();
 329         return my_load_module();
 330 }
 331
 332 int usecount(void)
 333 {
 334         return connected;
 335 }
 336
 337 char *key()
 338 {
 339         return ASTERISK_GPL_KEY;
 340 }