Standardize return values of load_config() so reload() doesn't report an error on...
[asterisk/asterisk.git] / cdr / cdr_manager.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 2004 - 2005
5  *
6  * See http://www.asterisk.org for more information about
7  * the Asterisk project. Please do not directly contact
8  * any of the maintainers of this project for assistance;
9  * the project provides a web site, mailing lists and IRC
10  * channels for your use.
11  *
12  * This program is free software, distributed under the terms of
13  * the GNU General Public License Version 2. See the LICENSE file
14  * at the top of the source tree.
15  */
16
17 /*! \file
18  *
19  * \brief Asterisk Call Manager CDR records.
20  *
21  * See also
22  * \arg \ref AstCDR
23  * \arg \ref AstAMI
24  * \arg \ref Config_ami
25  * \ingroup cdr_drivers
26  */
27
28 #include "asterisk.h"
29
30 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
31
32 #include <time.h>
33
34 #include "asterisk/channel.h"
35 #include "asterisk/cdr.h"
36 #include "asterisk/module.h"
37 #include "asterisk/utils.h"
38 #include "asterisk/manager.h"
39 #include "asterisk/config.h"
40 #include "asterisk/pbx.h"
41
42 #define DATE_FORMAT     "%Y-%m-%d %T"
43 #define CONF_FILE       "cdr_manager.conf"
44 #define CUSTOM_FIELDS_BUF_SIZE 1024
45
46 static char *name = "cdr_manager";
47
48 static int enablecdr = 0;
49
50 /*! 
51  * XXX
52  * \bug The handling of this variable is not thread-safe.  Crashes are possible on reload.
53  */
54 static struct ast_str *customfields;
55
56 static int manager_log(struct ast_cdr *cdr);
57
58 static int load_config(int reload)
59 {
60         char *cat = NULL;
61         struct ast_config *cfg;
62         struct ast_variable *v;
63         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
64         int newenablecdr = 0;
65
66         cfg = ast_config_load(CONF_FILE, config_flags);
67         if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
68                 return 0;
69         }
70
71         if (cfg == CONFIG_STATUS_FILEINVALID) {
72                 ast_log(LOG_ERROR, "Config file '%s' could not be parsed\n", CONF_FILE);
73                 return -1;
74         }
75
76         if (reload && customfields) {
77                 ast_free(customfields);
78         }
79         customfields = NULL;
80
81         if (!cfg) {
82                 /* Standard configuration */
83                 ast_log(LOG_WARNING, "Failed to load configuration file. Module not activated.\n");
84                 if (enablecdr)
85                         ast_cdr_unregister(name);
86                 enablecdr = 0;
87                 return -1;
88         }
89
90         while ( (cat = ast_category_browse(cfg, cat)) ) {
91                 if (!strcasecmp(cat, "general")) {
92                         v = ast_variable_browse(cfg, cat);
93                         while (v) {
94                                 if (!strcasecmp(v->name, "enabled"))
95                                         newenablecdr = ast_true(v->value);
96
97                                 v = v->next;
98                         }
99                 } else if (!strcasecmp(cat, "mappings")) {
100                         customfields = ast_str_create(CUSTOM_FIELDS_BUF_SIZE);
101                         v = ast_variable_browse(cfg, cat);
102                         while (v) {
103                                 if (customfields && !ast_strlen_zero(v->name) && !ast_strlen_zero(v->value)) {
104                                         if ((ast_str_strlen(customfields) + strlen(v->value) + strlen(v->name) + 14) < ast_str_size(customfields)) {
105                                                 ast_str_append(&customfields, -1, "%s: ${CDR(%s)}\r\n", v->value, v->name);
106                                                 ast_log(LOG_NOTICE, "Added mapping %s: ${CDR(%s)}\n", v->value, v->name);
107                                         } else {
108                                                 ast_log(LOG_WARNING, "No more buffer space to add other custom fields\n");
109                                                 break;
110                                         }
111
112                                 }
113                                 v = v->next;
114                         }
115                 }
116         }
117
118         ast_config_destroy(cfg);
119
120         if (enablecdr && !newenablecdr)
121                 ast_cdr_unregister(name);
122         else if (!enablecdr && newenablecdr)
123                 ast_cdr_register(name, "Asterisk Manager Interface CDR Backend", manager_log);
124         enablecdr = newenablecdr;
125
126         return 0;
127 }
128
129 static int manager_log(struct ast_cdr *cdr)
130 {
131         struct ast_tm timeresult;
132         char strStartTime[80] = "";
133         char strAnswerTime[80] = "";
134         char strEndTime[80] = "";
135         char buf[CUSTOM_FIELDS_BUF_SIZE];
136
137         if (!enablecdr)
138                 return 0;
139
140         ast_localtime(&cdr->start, &timeresult, NULL);
141         ast_strftime(strStartTime, sizeof(strStartTime), DATE_FORMAT, &timeresult);
142
143         if (cdr->answer.tv_sec) {
144                 ast_localtime(&cdr->answer, &timeresult, NULL);
145                 ast_strftime(strAnswerTime, sizeof(strAnswerTime), DATE_FORMAT, &timeresult);
146         }
147
148         ast_localtime(&cdr->end, &timeresult, NULL);
149         ast_strftime(strEndTime, sizeof(strEndTime), DATE_FORMAT, &timeresult);
150
151         buf[0] = 0;
152         /* Custom fields handling */
153         if (customfields != NULL && ast_str_strlen(customfields)) {
154                 struct ast_channel *dummy = ast_channel_alloc(0, 0, "", "", "", "", "", 0, "Substitution/%p", cdr);
155                 if (!dummy) {
156                         ast_log(LOG_ERROR, "Unable to allocate channel for variable substitution.\n");
157                         return 0;
158                 }
159                 dummy->cdr = ast_cdr_dup(cdr);
160                 pbx_substitute_variables_helper(dummy, ast_str_buffer(customfields), buf, sizeof(buf) - 1);
161                 ast_channel_release(dummy);
162         }
163
164         manager_event(EVENT_FLAG_CDR, "Cdr",
165             "AccountCode: %s\r\n"
166             "Source: %s\r\n"
167             "Destination: %s\r\n"
168             "DestinationContext: %s\r\n"
169             "CallerID: %s\r\n"
170             "Channel: %s\r\n"
171             "DestinationChannel: %s\r\n"
172             "LastApplication: %s\r\n"
173             "LastData: %s\r\n"
174             "StartTime: %s\r\n"
175             "AnswerTime: %s\r\n"
176             "EndTime: %s\r\n"
177             "Duration: %ld\r\n"
178             "BillableSeconds: %ld\r\n"
179             "Disposition: %s\r\n"
180             "AMAFlags: %s\r\n"
181             "UniqueID: %s\r\n"
182             "UserField: %s\r\n"
183             "%s",
184             cdr->accountcode, cdr->src, cdr->dst, cdr->dcontext, cdr->clid, cdr->channel,
185             cdr->dstchannel, cdr->lastapp, cdr->lastdata, strStartTime, strAnswerTime, strEndTime,
186             cdr->duration, cdr->billsec, ast_cdr_disp2str(cdr->disposition),
187             ast_cdr_flags2str(cdr->amaflags), cdr->uniqueid, cdr->userfield,buf);
188
189         return 0;
190 }
191
192 static int unload_module(void)
193 {
194         ast_cdr_unregister(name);
195         if (customfields)
196                 ast_free(customfields);
197
198         return 0;
199 }
200
201 static int load_module(void)
202 {
203         if (load_config(0)) {
204                 return AST_MODULE_LOAD_DECLINE;
205         }
206
207         return AST_MODULE_LOAD_SUCCESS;
208 }
209
210 static int reload(void)
211 {
212         return load_config(1);
213 }
214
215 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Asterisk Manager Interface CDR Backend",
216                 .load = load_module,
217                 .unload = unload_module,
218                 .reload = reload,
219                );