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 #include <errmsg.h>
  35
  36 #define DATE_FORMAT "%Y-%m-%d %T"
  37
  38 static char *desc = "PostgreSQL CDR Backend";
  39 static char *name = "pgsql";
  40 static char *config = "cdr_pgsql.conf";
  41 static char *pghostname = NULL, *pgdbname = NULL, *pgdbuser = NULL, *pgpassword = NULL, *pgdbsock = NULL, *pgdbport = NULL;
  42 static int hostname_alloc = 0, dbname_alloc = 0, dbuser_alloc = 0, password_alloc = 0, dbsock_alloc = 0, dbport_alloc = 0;
  43 static int connected = 0;
  44
  45 static ast_mutex_t pgsql_lock = AST_MUTEX_INITIALIZER;
  46
  47 PGconn          *conn;
  48 PGresult        *result;
  49
  50 static int pgsql_log(struct ast_cdr *cdr)
  51 {
  52         struct tm tm;
  53         struct timeval tv;
  54         char sqlcmd[2048], timestr[128];
  55         time_t t;
  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                         ast_log(LOG_ERROR, "cdr_pgsql: cannot connect to database server %s.  Call will not be logged\n", pghostname);
  72                 }
  73         } else {
  74                 /* Test to be sure we're still connected... */
  75                 /* If we're connected, and connection is working, good. */
  76                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
  77
  78                 if (PQstatus(conn) == CONNECTION_OK) {
  79                         connected = 1;
  80                 } else {
  81                         ast_log(LOG_ERROR, "cdr_pgsql: connection was lost... reattempting connection.");
  82                         PQreset(conn);
  83                         if (PQstatus(conn) == CONNECTION_OK) {
  84                                 ast_log(LOG_ERROR, "cdr_pgsql: connection reestablished.");
  85                                 connected = 1;
  86                         } else {
  87                                 ast_log(LOG_ERROR, "cdr_pgsql: unable to reconnect to database.");
  88                                 connected = 0;
  89                         }
  90                 }
  91
  92         }
  93
  94         if (connected) {
  95                 char *clid=NULL, *dcontext=NULL, *channel=NULL, *dstchannel=NULL, *lastapp=NULL, *lastdata=NULL;
  96                 char *uniqueid=NULL;
  97
  98                 /* Maximum space needed would be if all characters needed to be escaped, plus a trailing NULL */
  99                 if ((clid = alloca(strlen(cdr->clid) * 2 + 1)) != NULL)
 100                         PQescapeString(clid, cdr->clid, strlen(cdr->clid));
 101                 if ((dcontext = alloca(strlen(cdr->dcontext) * 2 + 1)) != NULL)
 102                         PQescapeString(dcontext, cdr->dcontext, strlen(cdr->dcontext));
 103                 if ((channel = alloca(strlen(cdr->channel) * 2 + 1)) != NULL)
 104                         PQescapeString(channel, cdr->channel, strlen(cdr->channel));
 105                 if ((dstchannel = alloca(strlen(cdr->dstchannel) * 2 + 1)) != NULL)
 106                         PQescapeString(dstchannel, cdr->dstchannel, strlen(cdr->dstchannel));
 107                 if ((lastapp = alloca(strlen(cdr->lastapp) * 2 + 1)) != NULL)
 108                         PQescapeString(lastapp, cdr->lastapp, strlen(cdr->lastapp));
 109                 if ((lastdata = alloca(strlen(cdr->lastdata) * 2 + 1)) != NULL)
 110                         PQescapeString(lastdata, cdr->lastdata, strlen(cdr->lastdata));
 111                 if ((uniqueid = alloca(strlen(cdr->uniqueid) * 2 + 1)) != NULL)
 112                         PQescapeString(uniqueid, cdr->uniqueid, strlen(cdr->uniqueid));
 113
 114                 /* Check for all alloca failures above at once */
 115                 if ((!clid) || (!dcontext) || (!channel) || (!dstchannel) || (!lastapp) || (!lastdata) || (!uniqueid)) {
 116                         ast_log(LOG_ERROR, "cdr_pgsql:  Out of memory error (insert fails)\n");
 117                         ast_mutex_unlock(&pgsql_lock);
 118                         return -1;
 119                 }
 120
 121                 ast_log(LOG_DEBUG,"cdr_pgsql: inserting a CDR record.\n");
 122
 123                 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);
 124                 ast_log(LOG_DEBUG,"cdr_pgsql: SQL command as follows:  %s\n",sqlcmd);
 125
 126                 result = PQexec(conn, sqlcmd);
 127                 if ( PQresultStatus(result) != PGRES_COMMAND_OK) {
 128                         ast_log(LOG_ERROR,"cdr_pgsql: Failed to insert call detail record into database.");
 129                         ast_mutex_unlock(&pgsql_lock);
 130                         return -1;
 131                 }
 132         }
 133         ast_mutex_unlock(&pgsql_lock);
 134         return 0;
 135 }
 136
 137 char *description(void)
 138 {
 139         return desc;
 140 }
 141
 142 static int my_unload_module(void)
 143 {
 144         PQfinish(conn);
 145         connected = 0;
 146         if (pghostname && hostname_alloc) {
 147                 free(pghostname);
 148                 pghostname = NULL;
 149                 hostname_alloc = 0;
 150         }
 151         if (pgdbname && dbname_alloc) {
 152                 free(pgdbname);
 153                 pgdbname = NULL;
 154                 dbname_alloc = 0;
 155         }
 156         if (pgdbuser && dbuser_alloc) {
 157                 free(pgdbuser);
 158                 pgdbuser = NULL;
 159                 dbuser_alloc = 0;
 160         }
 161         if (pgdbsock && dbsock_alloc) {
 162                 free(pgdbsock);
 163                 pgdbsock = NULL;
 164                 dbsock_alloc = 0;
 165         }
 166         if (pgpassword && password_alloc) {
 167                 free(pgpassword);
 168                 pgpassword = NULL;
 169                 password_alloc = 0;
 170         }
 171         if (pgdbport && dbport_alloc) {
 172                 free(pgdbport);
 173                 pgdbport = NULL;
 174                 dbport_alloc = 0;
 175         }
 176         ast_cdr_unregister(name);
 177         return 0;
 178 }
 179
 180 static int my_load_module(void)
 181 {
 182         int res;
 183         struct ast_config *cfg;
 184         struct ast_variable *var;
 185         char *tmp;
 186
 187         cfg = ast_load(config);
 188         if (!cfg) {
 189                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CDR's: %s\n", config);
 190                 return 0;
 191         }
 192
 193         var = ast_variable_browse(cfg, "global");
 194         if (!var) {
 195                 /* nothing configured */
 196                 return 0;
 197         }
 198
 199         tmp = ast_variable_retrieve(cfg,"global","hostname");
 200         if (tmp) {
 201                 pghostname = malloc(strlen(tmp) + 1);
 202                 if (pghostname != NULL) {
 203                         hostname_alloc = 1;
 204                         strcpy(pghostname,tmp);
 205                 } else {
 206                         ast_log(LOG_ERROR,"Out of memory error.\n");
 207                         return -1;
 208                 }
 209         } else {
 210                 ast_log(LOG_WARNING,"PostgreSQL server hostname not specified.  Assuming localhost\n");
 211                 pghostname = "localhost";
 212         }
 213
 214         tmp = ast_variable_retrieve(cfg,"global","dbname");
 215         if (tmp) {
 216                 pgdbname = malloc(strlen(tmp) + 1);
 217                 if (pgdbname != NULL) {
 218                         dbname_alloc = 1;
 219                         strcpy(pgdbname,tmp);
 220                 } else {
 221                         ast_log(LOG_ERROR,"Out of memory error.\n");
 222                         return -1;
 223                 }
 224         } else {
 225                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asteriskcdrdb\n");
 226                 pgdbname = "asteriskcdrdb";
 227         }
 228
 229         tmp = ast_variable_retrieve(cfg,"global","user");
 230         if (tmp) {
 231                 pgdbuser = malloc(strlen(tmp) + 1);
 232                 if (pgdbuser != NULL) {
 233                         dbuser_alloc = 1;
 234                         strcpy(pgdbuser,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                         password_alloc = 1;
 249                         strcpy(pgpassword,tmp);
 250                 } else {
 251                         ast_log(LOG_ERROR,"Out of memory error.\n");
 252                         return -1;
 253                 }
 254         } else {
 255                 ast_log(LOG_WARNING,"PostgreSQL database password not specified.  Assuming blank\n");
 256                 pgpassword = "";
 257         }
 258
 259         tmp = ast_variable_retrieve(cfg,"global","port");
 260         if (tmp) {
 261                 pgdbport = malloc(strlen(tmp) + 1);
 262                 if (pgdbport != NULL) {
 263                         dbport_alloc = 1;
 264                         strcpy(pgdbport,tmp);
 265                 } else {
 266                         ast_log(LOG_ERROR,"Out of memory error.\n");
 267                         return -1;
 268                 }
 269         } else {
 270                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default.\n");
 271                 pgdbport = "5432";
 272         }
 273
 274         ast_destroy(cfg);
 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                 ast_log(LOG_ERROR, "cdr_pgsql: cannot connect to database server %s.  Call will not be logged\n", pghostname);
 290                 connected = 0;
 291         }
 292
 293         res = ast_cdr_register(name, desc, pgsql_log);
 294         if (res) {
 295                 ast_log(LOG_ERROR, "Unable to register PGSQL CDR handling\n");
 296         }
 297         return res;
 298 }
 299
 300 int load_module(void)
 301 {
 302         return my_load_module();
 303 }
 304
 305 int unload_module(void)
 306 {
 307         return my_unload_module();
 308 }
 309
 310 int reload(void)
 311 {
 312         my_unload_module();
 313         return my_load_module();
 314 }
 315
 316 int usecount(void)
 317 {
 318         return connected;
 319 }
 320
 321 char *key()
 322 {
 323         return ASTERISK_GPL_KEY;
 324 }