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 static ast_mutex_t pgsql_lock = AST_MUTEX_INITIALIZER;
  45
  46 PGconn          *conn;
  47 PGresult        *result;
  48
  49 static int pgsql_log(struct ast_cdr *cdr)
  50 {
  51         struct tm tm;
  52         struct timeval tv;
  53         char sqlcmd[2048], timestr[128];
  54         time_t t;
  55         char *pgerror;
  56
  57         ast_mutex_lock(&pgsql_lock);
  58
  59         memset(sqlcmd,0,2048);
  60
  61         gettimeofday(&tv,NULL);
  62         t = tv.tv_sec;
  63         localtime_r(&t,&tm);
  64         strftime(timestr,128,DATE_FORMAT,&tm);
  65
  66         if ((!connected) && pghostname && pgdbuser && pgpassword && pgdbname) {
  67                 conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
  68                 if (PQstatus(conn) != CONNECTION_BAD) {
  69                         connected = 1;
  70                 } else {
  71                         pgerror = PQerrorMessage(conn);
  72                         ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
  73                         ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
  74                 }
  75         }
  76
  77         if (connected) {
  78                 char *clid=NULL, *dcontext=NULL, *channel=NULL, *dstchannel=NULL, *lastapp=NULL, *lastdata=NULL;
  79                 char *uniqueid=NULL;
  80
  81                 /* Maximum space needed would be if all characters needed to be escaped, plus a trailing NULL */
  82                 if ((clid = alloca(strlen(cdr->clid) * 2 + 1)) != NULL)
  83                         PQescapeString(clid, cdr->clid, strlen(cdr->clid));
  84                 if ((dcontext = alloca(strlen(cdr->dcontext) * 2 + 1)) != NULL)
  85                         PQescapeString(dcontext, cdr->dcontext, strlen(cdr->dcontext));
  86                 if ((channel = alloca(strlen(cdr->channel) * 2 + 1)) != NULL)
  87                         PQescapeString(channel, cdr->channel, strlen(cdr->channel));
  88                 if ((dstchannel = alloca(strlen(cdr->dstchannel) * 2 + 1)) != NULL)
  89                         PQescapeString(dstchannel, cdr->dstchannel, strlen(cdr->dstchannel));
  90                 if ((lastapp = alloca(strlen(cdr->lastapp) * 2 + 1)) != NULL)
  91                         PQescapeString(lastapp, cdr->lastapp, strlen(cdr->lastapp));
  92                 if ((lastdata = alloca(strlen(cdr->lastdata) * 2 + 1)) != NULL)
  93                         PQescapeString(lastdata, cdr->lastdata, strlen(cdr->lastdata));
  94                 if ((uniqueid = alloca(strlen(cdr->uniqueid) * 2 + 1)) != NULL)
  95                         PQescapeString(uniqueid, cdr->uniqueid, strlen(cdr->uniqueid));
  96
  97                 /* Check for all alloca failures above at once */
  98                 if ((!clid) || (!dcontext) || (!channel) || (!dstchannel) || (!lastapp) || (!lastdata) || (!uniqueid)) {
  99                         ast_log(LOG_ERROR, "cdr_pgsql:  Out of memory error (insert fails)\n");
 100                         ast_mutex_unlock(&pgsql_lock);
 101                         return -1;
 102                 }
 103
 104                 ast_log(LOG_DEBUG,"cdr_pgsql: inserting a CDR record.\n");
 105
 106                 sprintf(sqlcmd,"INSERT INTO cdr (calldate,clid,src,dst,dcontext,channel,dstchannel,lastapp,lastdata,duration,billsec,disposition,amaflags,accountcode,uniqueid) VALUES ('%s','%s','%s','%s','%s', '%s','%s','%s','%s',%i,%i,'%s',%i,'%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);
 107                 ast_log(LOG_DEBUG,"cdr_pgsql: SQL command executed:  %s\n",sqlcmd);
 108
 109                 /* Test to be sure we're still connected... */
 110                 /* If we're connected, and connection is working, good. */
 111                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
 112                 if (PQstatus(conn) == CONNECTION_OK) {
 113                         connected = 1;
 114                 } else {
 115                         ast_log(LOG_ERROR, "cdr_pgsql: Connection was lost... attempting to reconnect.\n");
 116                         PQreset(conn);
 117                         if (PQstatus(conn) == CONNECTION_OK) {
 118                                 ast_log(LOG_ERROR, "cdr_pgsql: Connection reestablished.\n");
 119                                 connected = 1;
 120                         } else {
 121                                 pgerror = PQerrorMessage(conn);
 122                                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to reconnect to database server %s. Calls will not be logged!\n", pghostname);
 123                                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 124                                 connected = 0;
 125                                 return -1;
 126                         }
 127                 }
 128                 result = PQexec(conn, sqlcmd);
 129                 if ( PQresultStatus(result) != PGRES_COMMAND_OK) {
 130                         pgerror = PQresultErrorMessage(result);
 131                         ast_log(LOG_ERROR,"cdr_pgsql: Failed to insert call detail record into database!\n");
 132                         ast_log(LOG_ERROR,"cdr_pgsql: Reason: %s\n", pgerror);
 133                         ast_mutex_unlock(&pgsql_lock);
 134                         return -1;
 135                 }
 136         }
 137         ast_mutex_unlock(&pgsql_lock);
 138         return 0;
 139 }
 140
 141 char *description(void)
 142 {
 143         return desc;
 144 }
 145
 146 static int my_unload_module(void)
 147 {
 148         PQfinish(conn);
 149         connected = 0;
 150         if (pghostname && hostname_alloc) {
 151                 free(pghostname);
 152                 pghostname = NULL;
 153                 hostname_alloc = 0;
 154         }
 155         if (pgdbname && dbname_alloc) {
 156                 free(pgdbname);
 157                 pgdbname = NULL;
 158                 dbname_alloc = 0;
 159         }
 160         if (pgdbuser && dbuser_alloc) {
 161                 free(pgdbuser);
 162                 pgdbuser = NULL;
 163                 dbuser_alloc = 0;
 164         }
 165         if (pgdbsock && dbsock_alloc) {
 166                 free(pgdbsock);
 167                 pgdbsock = NULL;
 168                 dbsock_alloc = 0;
 169         }
 170         if (pgpassword && password_alloc) {
 171                 free(pgpassword);
 172                 pgpassword = NULL;
 173                 password_alloc = 0;
 174         }
 175         if (pgdbport && dbport_alloc) {
 176                 free(pgdbport);
 177                 pgdbport = NULL;
 178                 dbport_alloc = 0;
 179         }
 180         ast_cdr_unregister(name);
 181         return 0;
 182 }
 183
 184 static int my_load_module(void)
 185 {
 186         int res;
 187         struct ast_config *cfg;
 188         struct ast_variable *var;
 189         char *pgerror;
 190         char *tmp;
 191
 192         cfg = ast_load(config);
 193         if (!cfg) {
 194                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CDR's: %s\n", config);
 195                 return 0;
 196         }
 197
 198         var = ast_variable_browse(cfg, "global");
 199         if (!var) {
 200                 /* nothing configured */
 201                 return 0;
 202         }
 203
 204         tmp = ast_variable_retrieve(cfg,"global","hostname");
 205         if (tmp) {
 206                 pghostname = malloc(strlen(tmp) + 1);
 207                 if (pghostname != NULL) {
 208                         hostname_alloc = 1;
 209                         strcpy(pghostname,tmp);
 210                 } else {
 211                         ast_log(LOG_ERROR,"Out of memory error.\n");
 212                         return -1;
 213                 }
 214         } else {
 215                 ast_log(LOG_WARNING,"PostgreSQL server hostname not specified.  Assuming localhost\n");
 216                 pghostname = "localhost";
 217         }
 218
 219         tmp = ast_variable_retrieve(cfg,"global","dbname");
 220         if (tmp) {
 221                 pgdbname = malloc(strlen(tmp) + 1);
 222                 if (pgdbname != NULL) {
 223                         dbname_alloc = 1;
 224                         strcpy(pgdbname,tmp);
 225                 } else {
 226                         ast_log(LOG_ERROR,"Out of memory error.\n");
 227                         return -1;
 228                 }
 229         } else {
 230                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asterisk\n");
 231                 pgdbname = "asteriskcdrdb";
 232         }
 233
 234         tmp = ast_variable_retrieve(cfg,"global","user");
 235         if (tmp) {
 236                 pgdbuser = malloc(strlen(tmp) + 1);
 237                 if (pgdbuser != NULL) {
 238                         dbuser_alloc = 1;
 239                         strcpy(pgdbuser,tmp);
 240                 } else {
 241                         ast_log(LOG_ERROR,"Out of memory error.\n");
 242                         return -1;
 243                 }
 244         } else {
 245                 ast_log(LOG_WARNING,"PostgreSQL database user not specified.  Assuming root\n");
 246                 pgdbuser = "root";
 247         }
 248
 249         tmp = ast_variable_retrieve(cfg,"global","password");
 250         if (tmp) {
 251                 pgpassword = malloc(strlen(tmp) + 1);
 252                 if (pgpassword != NULL) {
 253                         password_alloc = 1;
 254                         strcpy(pgpassword,tmp);
 255                 } else {
 256                         ast_log(LOG_ERROR,"Out of memory error.\n");
 257                         return -1;
 258                 }
 259         } else {
 260                 ast_log(LOG_WARNING,"PostgreSQL database password not specified.  Assuming blank\n");
 261                 pgpassword = "";
 262         }
 263
 264         tmp = ast_variable_retrieve(cfg,"global","port");
 265         if (tmp) {
 266                 pgdbport = malloc(strlen(tmp) + 1);
 267                 if (pgdbport != NULL) {
 268                         dbport_alloc = 1;
 269                         strcpy(pgdbport,tmp);
 270                 } else {
 271                         ast_log(LOG_ERROR,"Out of memory error.\n");
 272                         return -1;
 273                 }
 274         } else {
 275                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default 5432.\n");
 276                 pgdbport = "5432";
 277         }
 278
 279         ast_destroy(cfg);
 280
 281         ast_log(LOG_DEBUG,"cdr_pgsql: got hostname of %s\n",pghostname);
 282         ast_log(LOG_DEBUG,"cdr_pgsql: got port of %s\n",pgdbport);
 283         if (pgdbsock)
 284                 ast_log(LOG_DEBUG,"cdr_pgsql: got sock file of %s\n",pgdbsock);
 285         ast_log(LOG_DEBUG,"cdr_pgsql: got user of %s\n",pgdbuser);
 286         ast_log(LOG_DEBUG,"cdr_pgsql: got dbname of %s\n",pgdbname);
 287         ast_log(LOG_DEBUG,"cdr_pgsql: got password of %s\n",pgpassword);
 288
 289         conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 290         if (PQstatus(conn) != CONNECTION_BAD) {
 291                 ast_log(LOG_DEBUG,"Successfully connected to PostgreSQL database.\n");
 292                 connected = 1;
 293         } else {
 294                 pgerror = PQerrorMessage(conn);
 295                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
 296                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 297                 connected = 0;
 298         }
 299
 300         res = ast_cdr_register(name, desc, pgsql_log);
 301         if (res) {
 302                 ast_log(LOG_ERROR, "Unable to register PGSQL CDR handling\n");
 303         }
 304         return res;
 305 }
 306
 307 int load_module(void)
 308 {
 309         return my_load_module();
 310 }
 311
 312 int unload_module(void)
 313 {
 314         return my_unload_module();
 315 }
 316
 317 int reload(void)
 318 {
 319         my_unload_module();
 320         return my_load_module();
 321 }
 322
 323 int usecount(void)
 324 {
 325         return connected;
 326 }
 327
 328 char *key()
 329 {
 330         return ASTERISK_GPL_KEY;
 331 }