Fri Sep 29 11:12:25 2006

Asterisk developer's documentation


cdr_sqlite.c

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00001 /*
00002  * Asterisk -- An open source telephony toolkit.
00003  *
00004  * Copyright (C) 2004 - 2005, Holger Schurig
00005  *
00006  *
00007  * Ideas taken from other cdr_*.c files
00008  *
00009  * See http://www.asterisk.org for more information about
00010  * the Asterisk project. Please do not directly contact
00011  * any of the maintainers of this project for assistance;
00012  * the project provides a web site, mailing lists and IRC
00013  * channels for your use.
00014  *
00015  * This program is free software, distributed under the terms of
00016  * the GNU General Public License Version 2. See the LICENSE file
00017  * at the top of the source tree.
00018  */
00019 
00020 /*! \file
00021  *
00022  * \brief Store CDR records in a SQLite database.
00023  * 
00024  * \author Holger Schurig <hs4233@mail.mn-solutions.de>
00025  *
00026  * See also
00027  * \arg \ref Config_cdr
00028  * \arg http://www.sqlite.org/
00029  * 
00030  * Creates the database and table on-the-fly
00031  * \ingroup cdr_drivers
00032  */
00033 
00034 #include <sys/types.h>
00035 
00036 #include <stdio.h>
00037 #include <unistd.h>
00038 #include <string.h>
00039 #include <stdlib.h>
00040 #include <sqlite.h>
00041 
00042 #include "asterisk.h"
00043 
00044 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 23898 $")
00045 
00046 #include "asterisk/channel.h"
00047 #include "asterisk/module.h"
00048 #include "asterisk/logger.h"
00049 #include "asterisk/utils.h"
00050 
00051 #define LOG_UNIQUEID 0
00052 #define LOG_USERFIELD   0
00053 
00054 /* When you change the DATE_FORMAT, be sure to change the CHAR(19) below to something else */
00055 #define DATE_FORMAT "%Y-%m-%d %T"
00056 
00057 static char *desc = "SQLite CDR Backend";
00058 static char *name = "sqlite";
00059 static sqlite* db = NULL;
00060 
00061 AST_MUTEX_DEFINE_STATIC(sqlite_lock);
00062 
00063 /*! \brief SQL table format */
00064 static char sql_create_table[] = "CREATE TABLE cdr ("
00065 "  AcctId      INTEGER PRIMARY KEY,"
00066 "  clid     VARCHAR(80),"
00067 "  src      VARCHAR(80),"
00068 "  dst      VARCHAR(80),"
00069 "  dcontext VARCHAR(80),"
00070 "  channel     VARCHAR(80),"
00071 "  dstchannel  VARCHAR(80),"
00072 "  lastapp     VARCHAR(80),"
00073 "  lastdata VARCHAR(80),"
00074 "  start    CHAR(19),"
00075 "  answer      CHAR(19),"
00076 "  end      CHAR(19),"
00077 "  duration INTEGER,"
00078 "  billsec     INTEGER,"
00079 "  disposition INTEGER,"
00080 "  amaflags INTEGER,"
00081 "  accountcode VARCHAR(20)"
00082 #if LOG_UNIQUEID
00083 "  ,uniqueid   VARCHAR(32)"
00084 #endif
00085 #if LOG_USERFIELD
00086 "  ,userfield  VARCHAR(255)"
00087 #endif
00088 ");";
00089 
00090 static int sqlite_log(struct ast_cdr *cdr)
00091 {
00092    int res = 0;
00093    char *zErr = 0;
00094    struct tm tm;
00095    time_t t;
00096    char startstr[80], answerstr[80], endstr[80];
00097    int count;
00098 
00099    ast_mutex_lock(&sqlite_lock);
00100 
00101    t = cdr->start.tv_sec;
00102    localtime_r(&t, &tm);
00103    strftime(startstr, sizeof(startstr), DATE_FORMAT, &tm);
00104 
00105    t = cdr->answer.tv_sec;
00106    localtime_r(&t, &tm);
00107    strftime(answerstr, sizeof(answerstr), DATE_FORMAT, &tm);
00108 
00109    t = cdr->end.tv_sec;
00110    localtime_r(&t, &tm);
00111    strftime(endstr, sizeof(endstr), DATE_FORMAT, &tm);
00112 
00113    for(count=0; count<5; count++) {
00114       res = sqlite_exec_printf(db,
00115          "INSERT INTO cdr ("
00116             "clid,src,dst,dcontext,"
00117             "channel,dstchannel,lastapp,lastdata, "
00118             "start,answer,end,"
00119             "duration,billsec,disposition,amaflags, "
00120             "accountcode"
00121 #           if LOG_UNIQUEID
00122             ",uniqueid"
00123 #           endif
00124 #           if LOG_USERFIELD
00125             ",userfield"
00126 #           endif
00127          ") VALUES ("
00128             "'%q', '%q', '%q', '%q', "
00129             "'%q', '%q', '%q', '%q', "
00130             "'%q', '%q', '%q', "
00131             "%d, %d, %d, %d, "
00132             "'%q'"
00133 #           if LOG_UNIQUEID
00134             ",'%q'"
00135 #           endif
00136 #           if LOG_USERFIELD
00137             ",'%q'"
00138 #           endif
00139          ")", NULL, NULL, &zErr,
00140             cdr->clid, cdr->src, cdr->dst, cdr->dcontext,
00141             cdr->channel, cdr->dstchannel, cdr->lastapp, cdr->lastdata,
00142             startstr, answerstr, endstr,
00143             cdr->duration, cdr->billsec, cdr->disposition, cdr->amaflags,
00144             cdr->accountcode
00145 #           if LOG_UNIQUEID
00146             ,cdr->uniqueid
00147 #           endif
00148 #           if LOG_USERFIELD
00149             ,cdr->userfield
00150 #           endif
00151          );
00152       if (res != SQLITE_BUSY && res != SQLITE_LOCKED)
00153          break;
00154       usleep(200);
00155    }
00156    
00157    if (zErr) {
00158       ast_log(LOG_ERROR, "cdr_sqlite: %s\n", zErr);
00159       free(zErr);
00160    }
00161 
00162    ast_mutex_unlock(&sqlite_lock);
00163    return res;
00164 }
00165 
00166 
00167 char *description(void)
00168 {
00169    return desc;
00170 }
00171 
00172 int unload_module(void)
00173 {
00174    if (db)
00175       sqlite_close(db);
00176    ast_cdr_unregister(name);
00177    return 0;
00178 }
00179 
00180 int load_module(void)
00181 {
00182    char *zErr;
00183    char fn[PATH_MAX];
00184    int res;
00185 
00186    /* is the database there? */
00187    snprintf(fn, sizeof(fn), "%s/cdr.db", ast_config_AST_LOG_DIR);
00188    db = sqlite_open(fn, 0660, &zErr);
00189    if (!db) {
00190       ast_log(LOG_ERROR, "cdr_sqlite: %s\n", zErr);
00191       free(zErr);
00192       return -1;
00193    }
00194 
00195    /* is the table there? */
00196    res = sqlite_exec(db, "SELECT COUNT(AcctId) FROM cdr;", NULL, NULL, NULL);
00197    if (res) {
00198       res = sqlite_exec(db, sql_create_table, NULL, NULL, &zErr);
00199       if (res) {
00200          ast_log(LOG_ERROR, "cdr_sqlite: Unable to create table 'cdr': %s\n", zErr);
00201          free(zErr);
00202          goto err;
00203       }
00204 
00205       /* TODO: here we should probably create an index */
00206    }
00207    
00208    res = ast_cdr_register(name, desc, sqlite_log);
00209    if (res) {
00210       ast_log(LOG_ERROR, "Unable to register SQLite CDR handling\n");
00211       return -1;
00212    }
00213    return 0;
00214 
00215 err:
00216    if (db)
00217       sqlite_close(db);
00218    return -1;
00219 }
00220 
00221 int reload(void)
00222 {
00223    return 0;
00224 }
00225 
00226 int usecount(void)
00227 {
00228    return 0;
00229 }
00230 
00231 char *key()
00232 {
00233    return ASTERISK_GPL_KEY;
00234 }

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