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 <time.h>
  38
  39 #include "asterisk/paths.h"     /* use ast_config_AST_LOG_DIR */
  40 #include "asterisk/channel.h"
  41 #include "asterisk/cdr.h"
  42 #include "asterisk/module.h"
  43 #include "asterisk/config.h"
  44 #include "asterisk/pbx.h"
  45 #include "asterisk/utils.h"
  46 #include "asterisk/lock.h"
  47
  48 #define CUSTOM_LOG_DIR "/cdr_custom"
  49
  50 #define DATE_FORMAT "%Y-%m-%d %T"
  51
  52 AST_MUTEX_DEFINE_STATIC(lock);
  53 AST_MUTEX_DEFINE_STATIC(mf_lock);
  54
  55 static char *name = "cdr-custom";
  56
  57 static char master[PATH_MAX];
  58 static char format[1024]="";
  59
  60 static int load_config(int reload)
  61 {
  62         struct ast_config *cfg;
  63         struct ast_variable *var;
  64         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
  65         int res = -1;
  66
  67         if ((cfg = ast_config_load("cdr_custom.conf", config_flags)) == CONFIG_STATUS_FILEUNCHANGED)
  68                 return 0;
  69
  70         strcpy(format, "");
  71         strcpy(master, "");
  72         ast_mutex_lock(&lock);
  73         if (cfg) {
  74                 var = ast_variable_browse(cfg, "mappings");
  75                 while(var) {
  76                         if (!ast_strlen_zero(var->name) && !ast_strlen_zero(var->value)) {
  77                                 if (strlen(var->value) > (sizeof(format) - 1))
  78                                         ast_log(LOG_WARNING, "Format string too long, will be truncated, at line %d\n", var->lineno);
  79                                 ast_copy_string(format, var->value, sizeof(format) - 1);
  80                                 strcat(format,"\n");
  81                                 snprintf(master, sizeof(master),"%s/%s/%s", ast_config_AST_LOG_DIR, name, var->name);
  82                                 if (var->next) {
  83                                         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);
  84                                         break;
  85                                 }
  86                         } else
  87                                 ast_log(LOG_NOTICE, "Mapping must have both filename and format at line %d\n", var->lineno);
  88                         var = var->next;
  89                 }
  90                 ast_config_destroy(cfg);
  91                 res = 0;
  92         } else {
  93                 if (reload)
  94                         ast_log(LOG_WARNING, "Failed to reload configuration file.\n");
  95                 else
  96                         ast_log(LOG_WARNING, "Failed to load configuration file. Module not activated.\n");
  97         }
  98         ast_mutex_unlock(&lock);
  99
 100         return res;
 101 }
 102
 103
 104
 105 static int custom_log(struct ast_cdr *cdr)
 106 {
 107         FILE *mf = NULL;
 108
 109         /* Make sure we have a big enough buf */
 110         char buf[2048];
 111         struct ast_channel dummy;
 112
 113         /* Abort if no master file is specified */
 114         if (ast_strlen_zero(master))
 115                 return 0;
 116
 117         /* Quite possibly the first use of a static struct ast_channel, we need it so the var funcs will work */
 118         memset(&dummy, 0, sizeof(dummy));
 119         dummy.cdr = cdr;
 120         pbx_substitute_variables_helper(&dummy, format, buf, sizeof(buf) - 1);
 121
 122         /* because of the absolutely unconditional need for the
 123            highest reliability possible in writing billing records,
 124            we open write and close the log file each time */
 125         ast_mutex_lock(&mf_lock);
 126         mf = fopen(master, "a");
 127         if (mf) {
 128                 fputs(buf, mf);
 129                 fflush(mf); /* be particularly anal here */
 130                 fclose(mf);
 131                 mf = NULL;
 132                 ast_mutex_unlock(&mf_lock);
 133         } else {
 134                 ast_log(LOG_ERROR, "Unable to re-open master file %s : %s\n", master, strerror(errno));
 135                 ast_mutex_unlock(&mf_lock);
 136         }
 137
 138         return 0;
 139 }
 140
 141 static int unload_module(void)
 142 {
 143         ast_cdr_unregister(name);
 144         return 0;
 145 }
 146
 147 static int load_module(void)
 148 {
 149         int res = 0;
 150
 151         if (!load_config(0)) {
 152                 res = ast_cdr_register(name, ast_module_info->description, custom_log);
 153                 if (res)
 154                         ast_log(LOG_ERROR, "Unable to register custom CDR handling\n");
 155                 return res;
 156         } else
 157                 return AST_MODULE_LOAD_DECLINE;
 158 }
 159
 160 static int reload(void)
 161 {
 162         return load_config(1);
 163 }
 164
 165 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Customizable Comma Separated Values CDR Backend",
 166                 .load = load_module,
 167                 .unload = unload_module,
 168                 .reload = reload,
 169                );
 170