cdr/cdr_custom.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2005, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * Includes code and algorithms from the Zapata library.
   9  *
  10  * See http://www.asterisk.org for more information about
  11  * the Asterisk project. Please do not directly contact
  12  * any of the maintainers of this project for assistance;
  13  * the project provides a web site, mailing lists and IRC
  14  * channels for your use.
  15  *
  16  * This program is free software, distributed under the terms of
  17  * the GNU General Public License Version 2. See the LICENSE file
  18  * at the top of the source tree.
  19  */
  20
  21 /*! \file
  22  *
  23  * \brief Custom Comma Separated Value CDR records.
  24  *
  25  * \author Mark Spencer <markster@digium.com>
  26  *
  27  * \arg See also \ref AstCDR
  28  *
  29  * Logs in LOG_DIR/cdr_custom
  30  * \ingroup cdr_drivers
  31  */
  32
  33 #include "asterisk.h"
  34
  35 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  36
  37 #include <sys/types.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <errno.h>
  41
  42 #include <stdlib.h>
  43 #include <unistd.h>
  44 #include <time.h>
  45
  46 #include "asterisk/channel.h"
  47 #include "asterisk/cdr.h"
  48 #include "asterisk/module.h"
  49 #include "asterisk/config.h"
  50 #include "asterisk/pbx.h"
  51 #include "asterisk/logger.h"
  52 #include "asterisk/utils.h"
  53 #include "asterisk/lock.h"
  54
  55 #define CUSTOM_LOG_DIR "/cdr_custom"
  56
  57 #define DATE_FORMAT "%Y-%m-%d %T"
  58
  59 AST_MUTEX_DEFINE_STATIC(lock);
  60 AST_MUTEX_DEFINE_STATIC(mf_lock);
  61
  62 static char *name = "cdr-custom";
  63
  64 static char master[PATH_MAX];
  65 static char format[1024]="";
  66
  67 static int load_config(int reload)
  68 {
  69         struct ast_config *cfg;
  70         struct ast_variable *var;
  71         int res = -1;
  72
  73         strcpy(format, "");
  74         strcpy(master, "");
  75         ast_mutex_lock(&lock);
  76         if((cfg = ast_config_load("cdr_custom.conf"))) {
  77                 var = ast_variable_browse(cfg, "mappings");
  78                 while(var) {
  79                         if (!ast_strlen_zero(var->name) && !ast_strlen_zero(var->value)) {
  80                                 if (strlen(var->value) > (sizeof(format) - 1))
  81                                         ast_log(LOG_WARNING, "Format string too long, will be truncated, at line %d\n", var->lineno);
  82                                 ast_copy_string(format, var->value, sizeof(format) - 1);
  83                                 strcat(format,"\n");
  84                                 snprintf(master, sizeof(master),"%s/%s/%s", ast_config_AST_LOG_DIR, name, var->name);
  85                                 if (var->next) {
  86                                         ast_log(LOG_NOTICE, "Sorry, only one mapping is supported at this time, mapping '%s' will be ignored at line %d.\n", var->next->name, var->next->lineno);
  87                                         break;
  88                                 }
  89                         } else
  90                                 ast_log(LOG_NOTICE, "Mapping must have both filename and format at line %d\n", var->lineno);
  91                         var = var->next;
  92                 }
  93                 ast_config_destroy(cfg);
  94                 res = 0;
  95         } else {
  96                 if (reload)
  97                         ast_log(LOG_WARNING, "Failed to reload configuration file.\n");
  98                 else
  99                         ast_log(LOG_WARNING, "Failed to load configuration file. Module not activated.\n");
 100         }
 101         ast_mutex_unlock(&lock);
 102
 103         return res;
 104 }
 105
 106
 107
 108 static int custom_log(struct ast_cdr *cdr)
 109 {
 110         FILE *mf = NULL;
 111
 112         /* Make sure we have a big enough buf */
 113         char buf[2048];
 114         struct ast_channel dummy;
 115
 116         /* Abort if no master file is specified */
 117         if (ast_strlen_zero(master))
 118                 return 0;
 119
 120         memset(buf, 0 , sizeof(buf));
 121         /* Quite possibly the first use of a static struct ast_channel, we need it so the var funcs will work */
 122         memset(&dummy, 0, sizeof(dummy));
 123         dummy.cdr = cdr;
 124         pbx_substitute_variables_helper(&dummy, format, buf, sizeof(buf) - 1);
 125
 126         /* because of the absolutely unconditional need for the
 127            highest reliability possible in writing billing records,
 128            we open write and close the log file each time */
 129         ast_mutex_lock(&mf_lock);
 130         mf = fopen(master, "a");
 131         if (mf) {
 132                 fputs(buf, mf);
 133                 fflush(mf); /* be particularly anal here */
 134                 fclose(mf);
 135                 mf = NULL;
 136                 ast_mutex_unlock(&mf_lock);
 137         } else {
 138                 ast_log(LOG_ERROR, "Unable to re-open master file %s : %s\n", master, strerror(errno));
 139                 ast_mutex_unlock(&mf_lock);
 140         }
 141
 142         return 0;
 143 }
 144
 145 static int unload_module(void)
 146 {
 147         ast_cdr_unregister(name);
 148         return 0;
 149 }
 150
 151 static int load_module(void)
 152 {
 153         int res = 0;
 154
 155         if (!load_config(0)) {
 156                 res = ast_cdr_register(name, ast_module_info->description, custom_log);
 157                 if (res)
 158                         ast_log(LOG_ERROR, "Unable to register custom CDR handling\n");
 159                 return res;
 160         } else
 161                 return AST_MODULE_LOAD_DECLINE;
 162 }
 163
 164 static int reload(void)
 165 {
 166         return load_config(1);
 167 }
 168
 169 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Customizable Comma Separated Values CDR Backend",
 170                 .load = load_module,
 171                 .unload = unload_module,
 172                 .reload = reload,
 173                );
 174