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, *userfield=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                 if ((userfield = alloca(strlen(cdr->userfield) * 2 + 1)) != NULL)
  97                         PQescapeString(userfield, cdr->userfield, strlen(cdr->userfield));
  98
  99                 /* Check for all alloca failures above at once */
 100                 if ((!clid) || (!dcontext) || (!channel) || (!dstchannel) || (!lastapp) || (!lastdata) || (!uniqueid) || (!userfield)) {
 101                         ast_log(LOG_ERROR, "cdr_pgsql:  Out of memory error (insert fails)\n");
 102                         ast_mutex_unlock(&pgsql_lock);
 103                         return -1;
 104                 }
 105
 106                 ast_log(LOG_DEBUG,"cdr_pgsql: inserting a CDR record.\n");
 107
 108                 sprintf(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);
 109                 ast_log(LOG_DEBUG,"cdr_pgsql: SQL command executed:  %s\n",sqlcmd);
 110
 111                 /* Test to be sure we're still connected... */
 112                 /* If we're connected, and connection is working, good. */
 113                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
 114                 if (PQstatus(conn) == CONNECTION_OK) {
 115                         connected = 1;
 116                 } else {
 117                         ast_log(LOG_ERROR, "cdr_pgsql: Connection was lost... attempting to reconnect.\n");
 118                         PQreset(conn);
 119                         if (PQstatus(conn) == CONNECTION_OK) {
 120                                 ast_log(LOG_ERROR, "cdr_pgsql: Connection reestablished.\n");
 121                                 connected = 1;
 122                         } else {
 123                                 pgerror = PQerrorMessage(conn);
 124                                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to reconnect to database server %s. Calls will not be logged!\n", pghostname);
 125                                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 126                                 connected = 0;
 127                                 ast_mutex_unlock(&pgsql_lock);
 128                                 return -1;
 129                         }
 130                 }
 131                 result = PQexec(conn, sqlcmd);
 132                 if ( PQresultStatus(result) != PGRES_COMMAND_OK) {
 133                         pgerror = PQresultErrorMessage(result);
 134                         ast_log(LOG_ERROR,"cdr_pgsql: Failed to insert call detail record into database!\n");
 135                         ast_log(LOG_ERROR,"cdr_pgsql: Reason: %s\n", pgerror);
 136                         ast_mutex_unlock(&pgsql_lock);
 137                         return -1;
 138                 }
 139         }
 140         ast_mutex_unlock(&pgsql_lock);
 141         return 0;
 142 }
 143
 144 char *description(void)
 145 {
 146         return desc;
 147 }
 148
 149 static int my_unload_module(void)
 150 {
 151         PQfinish(conn);
 152         connected = 0;
 153         if (pghostname && hostname_alloc) {
 154                 free(pghostname);
 155                 pghostname = NULL;
 156                 hostname_alloc = 0;
 157         }
 158         if (pgdbname && dbname_alloc) {
 159                 free(pgdbname);
 160                 pgdbname = NULL;
 161                 dbname_alloc = 0;
 162         }
 163         if (pgdbuser && dbuser_alloc) {
 164                 free(pgdbuser);
 165                 pgdbuser = NULL;
 166                 dbuser_alloc = 0;
 167         }
 168         if (pgdbsock && dbsock_alloc) {
 169                 free(pgdbsock);
 170                 pgdbsock = NULL;
 171                 dbsock_alloc = 0;
 172         }
 173         if (pgpassword && password_alloc) {
 174                 free(pgpassword);
 175                 pgpassword = NULL;
 176                 password_alloc = 0;
 177         }
 178         if (pgdbport && dbport_alloc) {
 179                 free(pgdbport);
 180                 pgdbport = NULL;
 181                 dbport_alloc = 0;
 182         }
 183         ast_cdr_unregister(name);
 184         return 0;
 185 }
 186
 187 static int my_load_module(void)
 188 {
 189         int res;
 190         struct ast_config *cfg;
 191         struct ast_variable *var;
 192         char *pgerror;
 193         char *tmp;
 194
 195         cfg = ast_load(config);
 196         if (!cfg) {
 197                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CDR's: %s\n", config);
 198                 return 0;
 199         }
 200
 201         var = ast_variable_browse(cfg, "global");
 202         if (!var) {
 203                 /* nothing configured */
 204                 return 0;
 205         }
 206
 207         tmp = ast_variable_retrieve(cfg,"global","hostname");
 208         if (tmp) {
 209                 pghostname = malloc(strlen(tmp) + 1);
 210                 if (pghostname != NULL) {
 211                         hostname_alloc = 1;
 212                         strcpy(pghostname,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                         dbname_alloc = 1;
 227                         strcpy(pgdbname,tmp);
 228                 } else {
 229                         ast_log(LOG_ERROR,"Out of memory error.\n");
 230                         return -1;
 231                 }
 232         } else {
 233                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asterisk\n");
 234                 pgdbname = "asteriskcdrdb";
 235         }
 236
 237         tmp = ast_variable_retrieve(cfg,"global","user");
 238         if (tmp) {
 239                 pgdbuser = malloc(strlen(tmp) + 1);
 240                 if (pgdbuser != NULL) {
 241                         dbuser_alloc = 1;
 242                         strcpy(pgdbuser,tmp);
 243                 } else {
 244                         ast_log(LOG_ERROR,"Out of memory error.\n");
 245                         return -1;
 246                 }
 247         } else {
 248                 ast_log(LOG_WARNING,"PostgreSQL database user not specified.  Assuming root\n");
 249                 pgdbuser = "root";
 250         }
 251
 252         tmp = ast_variable_retrieve(cfg,"global","password");
 253         if (tmp) {
 254                 pgpassword = malloc(strlen(tmp) + 1);
 255                 if (pgpassword != NULL) {
 256                         password_alloc = 1;
 257                         strcpy(pgpassword,tmp);
 258                 } else {
 259                         ast_log(LOG_ERROR,"Out of memory error.\n");
 260                         return -1;
 261                 }
 262         } else {
 263                 ast_log(LOG_WARNING,"PostgreSQL database password not specified.  Assuming blank\n");
 264                 pgpassword = "";
 265         }
 266
 267         tmp = ast_variable_retrieve(cfg,"global","port");
 268         if (tmp) {
 269                 pgdbport = malloc(strlen(tmp) + 1);
 270                 if (pgdbport != NULL) {
 271                         dbport_alloc = 1;
 272                         strcpy(pgdbport,tmp);
 273                 } else {
 274                         ast_log(LOG_ERROR,"Out of memory error.\n");
 275                         return -1;
 276                 }
 277         } else {
 278                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default 5432.\n");
 279                 pgdbport = "5432";
 280         }
 281
 282         ast_destroy(cfg);
 283
 284         ast_log(LOG_DEBUG,"cdr_pgsql: got hostname of %s\n",pghostname);
 285         ast_log(LOG_DEBUG,"cdr_pgsql: got port of %s\n",pgdbport);
 286         if (pgdbsock)
 287                 ast_log(LOG_DEBUG,"cdr_pgsql: got sock file of %s\n",pgdbsock);
 288         ast_log(LOG_DEBUG,"cdr_pgsql: got user of %s\n",pgdbuser);
 289         ast_log(LOG_DEBUG,"cdr_pgsql: got dbname of %s\n",pgdbname);
 290         ast_log(LOG_DEBUG,"cdr_pgsql: got password of %s\n",pgpassword);
 291
 292         conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 293         if (PQstatus(conn) != CONNECTION_BAD) {
 294                 ast_log(LOG_DEBUG,"Successfully connected to PostgreSQL database.\n");
 295                 connected = 1;
 296         } else {
 297                 pgerror = PQerrorMessage(conn);
 298                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
 299                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
 300                 connected = 0;
 301         }
 302
 303         res = ast_cdr_register(name, desc, pgsql_log);
 304         if (res) {
 305                 ast_log(LOG_ERROR, "Unable to register PGSQL CDR handling\n");
 306         }
 307         return res;
 308 }
 309
 310 int load_module(void)
 311 {
 312         return my_load_module();
 313 }
 314
 315 int unload_module(void)
 316 {
 317         return my_unload_module();
 318 }
 319
 320 int reload(void)
 321 {
 322         my_unload_module();
 323         return my_load_module();
 324 }
 325
 326 int usecount(void)
 327 {
 328         return connected;
 329 }
 330
 331 char *key()
 332 {
 333         return ASTERISK_GPL_KEY;
 334 }