Fix PGSQL CDR issue (bug #3028)
[asterisk/asterisk.git] / 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
35 #define DATE_FORMAT "%Y-%m-%d %T"
36
37 static char *desc = "PostgreSQL CDR Backend";
38 static char *name = "pgsql";
39 static char *config = "cdr_pgsql.conf";
40 static char *pghostname = NULL, *pgdbname = NULL, *pgdbuser = NULL, *pgpassword = NULL, *pgdbsock = NULL, *pgdbport = NULL, *table = NULL;
41 static int hostname_alloc = 0, dbname_alloc = 0, dbuser_alloc = 0, password_alloc = 0, dbsock_alloc = 0, dbport_alloc = 0, table_alloc = 0;
42 static int connected = 0;
43
44 AST_MUTEX_DEFINE_STATIC(pgsql_lock);
45
46 PGconn          *conn;
47 PGresult        *result;
48
49 static int pgsql_log(struct ast_cdr *cdr)
50 {
51         struct tm tm;
52         char sqlcmd[2048] = "", timestr[128];
53         char *pgerror;
54
55         ast_mutex_lock(&pgsql_lock);
56
57         localtime_r(&cdr->start.tv_sec,&tm);
58         strftime(timestr, sizeof(timestr), DATE_FORMAT, &tm);
59
60         if ((!connected) && pghostname && pgdbuser && pgpassword && pgdbname) {
61                 conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
62                 if (PQstatus(conn) != CONNECTION_BAD) {
63                         connected = 1;
64                 } else {
65                         pgerror = PQerrorMessage(conn);
66                         ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
67                         ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
68                 }
69         }
70
71         if (connected) {
72                 char *clid=NULL, *dcontext=NULL, *channel=NULL, *dstchannel=NULL, *lastapp=NULL, *lastdata=NULL;
73                 char *uniqueid=NULL, *userfield=NULL;
74
75                 /* Maximum space needed would be if all characters needed to be escaped, plus a trailing NULL */
76                 if ((clid = alloca(strlen(cdr->clid) * 2 + 1)) != NULL)
77                         PQescapeString(clid, cdr->clid, strlen(cdr->clid));
78                 if ((dcontext = alloca(strlen(cdr->dcontext) * 2 + 1)) != NULL)
79                         PQescapeString(dcontext, cdr->dcontext, strlen(cdr->dcontext));
80                 if ((channel = alloca(strlen(cdr->channel) * 2 + 1)) != NULL)
81                         PQescapeString(channel, cdr->channel, strlen(cdr->channel));
82                 if ((dstchannel = alloca(strlen(cdr->dstchannel) * 2 + 1)) != NULL)
83                         PQescapeString(dstchannel, cdr->dstchannel, strlen(cdr->dstchannel));
84                 if ((lastapp = alloca(strlen(cdr->lastapp) * 2 + 1)) != NULL)
85                         PQescapeString(lastapp, cdr->lastapp, strlen(cdr->lastapp));
86                 if ((lastdata = alloca(strlen(cdr->lastdata) * 2 + 1)) != NULL)
87                         PQescapeString(lastdata, cdr->lastdata, strlen(cdr->lastdata));
88                 if ((uniqueid = alloca(strlen(cdr->uniqueid) * 2 + 1)) != NULL)
89                         PQescapeString(uniqueid, cdr->uniqueid, strlen(cdr->uniqueid));
90                 if ((userfield = alloca(strlen(cdr->userfield) * 2 + 1)) != NULL)
91                         PQescapeString(userfield, cdr->userfield, strlen(cdr->userfield));
92
93                 /* Check for all alloca failures above at once */
94                 if ((!clid) || (!dcontext) || (!channel) || (!dstchannel) || (!lastapp) || (!lastdata) || (!uniqueid) || (!userfield)) {
95                         ast_log(LOG_ERROR, "cdr_pgsql:  Out of memory error (insert fails)\n");
96                         ast_mutex_unlock(&pgsql_lock);
97                         return -1;
98                 }
99
100                 ast_log(LOG_DEBUG,"cdr_pgsql: inserting a CDR record.\n");
101
102                 snprintf(sqlcmd,sizeof(sqlcmd),"INSERT INTO %s (calldate,clid,src,dst,dcontext,channel,dstchannel,"
103                                  "lastapp,lastdata,duration,billsec,disposition,amaflags,accountcode,uniqueid,userfield) VALUES"
104                                  " ('%s','%s','%s','%s','%s', '%s','%s','%s','%s',%i,%i,'%s',%i,'%s','%s','%s')",
105                                  table,timestr,clid,cdr->src, cdr->dst, dcontext,channel, dstchannel, lastapp, lastdata,
106                                  cdr->duration,cdr->billsec,ast_cdr_disp2str(cdr->disposition),cdr->amaflags, cdr->accountcode, uniqueid, userfield);
107                 
108                 ast_log(LOG_DEBUG,"cdr_pgsql: SQL command executed:  %s\n",sqlcmd);
109                 
110                 /* Test to be sure we're still connected... */
111                 /* If we're connected, and connection is working, good. */
112                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
113                 if (PQstatus(conn) == CONNECTION_OK) {
114                         connected = 1;
115                 } else {
116                         ast_log(LOG_ERROR, "cdr_pgsql: Connection was lost... attempting to reconnect.\n");
117                         PQreset(conn);
118                         if (PQstatus(conn) == CONNECTION_OK) {
119                                 ast_log(LOG_ERROR, "cdr_pgsql: Connection reestablished.\n");
120                                 connected = 1;
121                         } else {
122                                 pgerror = PQerrorMessage(conn);
123                                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to reconnect to database server %s. Calls will not be logged!\n", pghostname);
124                                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
125                                 connected = 0;
126                                 ast_mutex_unlock(&pgsql_lock);
127                                 return -1;
128                         }
129                 }
130                 result = PQexec(conn, sqlcmd);
131                 if ( PQresultStatus(result) != PGRES_COMMAND_OK) {
132                         pgerror = PQresultErrorMessage(result);
133                         ast_log(LOG_ERROR,"cdr_pgsql: Failed to insert call detail record into database!\n");
134                         ast_log(LOG_ERROR,"cdr_pgsql: Reason: %s\n", pgerror);
135                         ast_mutex_unlock(&pgsql_lock);
136                         return -1;
137                 }
138         }
139         ast_mutex_unlock(&pgsql_lock);
140         return 0;
141 }
142
143 char *description(void)
144 {
145         return desc;
146 }
147
148 static int my_unload_module(void)
149
150         if (conn)
151                 PQfinish(conn);
152         conn = NULL;
153         connected = 0;
154         if (pghostname && hostname_alloc) {
155                 free(pghostname);
156                 pghostname = NULL;
157                 hostname_alloc = 0;
158         }
159         if (pgdbname && dbname_alloc) {
160                 free(pgdbname);
161                 pgdbname = NULL;
162                 dbname_alloc = 0;
163         }
164         if (pgdbuser && dbuser_alloc) {
165                 free(pgdbuser);
166                 pgdbuser = NULL;
167                 dbuser_alloc = 0;
168         }
169         if (pgdbsock && dbsock_alloc) {
170                 free(pgdbsock);
171                 pgdbsock = NULL;
172                 dbsock_alloc = 0;
173         }
174         if (pgpassword && password_alloc) {
175                 free(pgpassword);
176                 pgpassword = NULL;
177                 password_alloc = 0;
178         }
179         if (pgdbport && dbport_alloc) {
180                 free(pgdbport);
181                 pgdbport = NULL;
182                 dbport_alloc = 0;
183         }
184         if (table && table_alloc) {
185                 free(table);
186                 table = NULL;
187                 table_alloc = 0;
188         }
189         ast_cdr_unregister(name);
190         return 0;
191 }
192
193 static int process_my_load_module(struct ast_config *cfg)
194 {
195         int res;
196         struct ast_variable *var;
197         char *pgerror;
198         char *tmp;
199
200         var = ast_variable_browse(cfg, "global");
201         if (!var) {
202                 /* nothing configured */
203                 return 0;
204         }
205
206         tmp = ast_variable_retrieve(cfg,"global","hostname");
207         if (tmp) {
208                 pghostname = malloc(strlen(tmp) + 1);
209                 if (pghostname != NULL) {
210                         memset(pghostname, 0, strlen(tmp) + 1);
211                         hostname_alloc = 1;
212                         strncpy(pghostname, tmp, strlen(tmp));
213                 } else {
214                         ast_log(LOG_ERROR,"Out of memory error.\n");
215                         return -1;
216                 }
217         } else {
218                 ast_log(LOG_WARNING,"PostgreSQL server hostname not specified.  Assuming localhost\n");
219                 pghostname = "localhost";
220         }
221
222         tmp = ast_variable_retrieve(cfg,"global","dbname");
223         if (tmp) {
224                 pgdbname = malloc(strlen(tmp) + 1);
225                 if (pgdbname != NULL) {
226                         memset(pgdbname, 0, strlen(tmp) + 1);
227                         dbname_alloc = 1;
228                         strncpy(pgdbname, tmp, strlen(tmp));
229                 } else {
230                         ast_log(LOG_ERROR,"Out of memory error.\n");
231                         return -1;
232                 }
233         } else {
234                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asterisk\n");
235                 pgdbname = "asteriskcdrdb";
236         }
237
238         tmp = ast_variable_retrieve(cfg,"global","user");
239         if (tmp) {
240                 pgdbuser = malloc(strlen(tmp) + 1);
241                 if (pgdbuser != NULL) {
242                         memset(pgdbuser, 0, strlen(tmp) + 1);
243                         dbuser_alloc = 1;
244                         strncpy(pgdbuser, tmp, strlen(tmp));
245                 } else {
246                         ast_log(LOG_ERROR,"Out of memory error.\n");
247                         return -1;
248                 }
249         } else {
250                 ast_log(LOG_WARNING,"PostgreSQL database user not specified.  Assuming root\n");
251                 pgdbuser = "root";
252         }
253
254         tmp = ast_variable_retrieve(cfg,"global","password");
255         if (tmp) {
256                 pgpassword = malloc(strlen(tmp) + 1);
257                 if (pgpassword != NULL) {
258                         memset(pgpassword, 0, strlen(tmp) + 1);
259                         password_alloc = 1;
260                         strncpy(pgpassword, tmp, strlen(tmp));
261                 } else {
262                         ast_log(LOG_ERROR,"Out of memory error.\n");
263                         return -1;
264                 }
265         } else {
266                 ast_log(LOG_WARNING,"PostgreSQL database password not specified.  Assuming blank\n");
267                 pgpassword = "";
268         }
269
270         tmp = ast_variable_retrieve(cfg,"global","port");
271         if (tmp) {
272                 pgdbport = malloc(strlen(tmp) + 1);
273                 if (pgdbport != NULL) {
274                         memset(pgdbport, 0, strlen(tmp) + 1);
275                         dbport_alloc = 1;
276                         strncpy(pgdbport, tmp, strlen(tmp));
277                 } else {
278                         ast_log(LOG_ERROR,"Out of memory error.\n");
279                         return -1;
280                 }
281         } else {
282                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default 5432.\n");
283                 pgdbport = "5432";
284         }
285         /* Loading stuff for table name */
286         tmp = ast_variable_retrieve(cfg,"global","table");
287         if (tmp) {
288                 table = malloc(strlen(tmp) + 1);
289                 if (table != NULL) {
290                         memset(table, 0, strlen(tmp) + 1);
291                         table_alloc = 1;
292                         strncpy(table, tmp, strlen(tmp));
293                 } else {
294                         ast_log(LOG_ERROR,"Out of memory error.\n");
295                         return -1;
296                 }
297         } else {
298                 ast_log(LOG_WARNING,"CDR table not specified.  Assuming cdr\n");
299                 table = "cdr";
300         }
301
302         ast_log(LOG_DEBUG,"cdr_pgsql: got hostname of %s\n",pghostname);
303         ast_log(LOG_DEBUG,"cdr_pgsql: got port of %s\n",pgdbport);
304         if (pgdbsock)
305                 ast_log(LOG_DEBUG,"cdr_pgsql: got sock file of %s\n",pgdbsock);
306         ast_log(LOG_DEBUG,"cdr_pgsql: got user of %s\n",pgdbuser);
307         ast_log(LOG_DEBUG,"cdr_pgsql: got dbname of %s\n",pgdbname);
308         ast_log(LOG_DEBUG,"cdr_pgsql: got password of %s\n",pgpassword);
309         ast_log(LOG_DEBUG,"cdr_pgsql: got sql table name of %s\n",table);
310         
311         conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
312         if (PQstatus(conn) != CONNECTION_BAD) {
313                 ast_log(LOG_DEBUG,"Successfully connected to PostgreSQL database.\n");
314                 connected = 1;
315         } else {
316                 pgerror = PQerrorMessage(conn);
317                 ast_log(LOG_ERROR, "cdr_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
318                 ast_log(LOG_ERROR, "cdr_pgsql: Reason: %s\n", pgerror);
319                 connected = 0;
320         }
321
322         res = ast_cdr_register(name, desc, pgsql_log);
323         if (res) {
324                 ast_log(LOG_ERROR, "Unable to register PGSQL CDR handling\n");
325         }
326         return res;
327 }
328
329 static int my_load_module(void)
330 {
331         struct ast_config *cfg;
332         int res;
333         cfg = ast_load(config);
334         if (!cfg) {
335                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CDR's: %s\n", config);
336                 return 0;
337         }
338         res = process_my_load_module(cfg);
339         ast_destroy(cfg);
340         return res;
341 }
342
343 int load_module(void)
344 {
345         return my_load_module();
346 }
347
348 int unload_module(void)
349 {
350         return my_unload_module();
351 }
352
353 int reload(void)
354 {
355         my_unload_module();
356         return my_load_module();
357 }
358
359 int usecount(void)
360 {
361         /* To be able to unload the module */
362         if ( ast_mutex_trylock(&pgsql_lock) ) {
363                 return 1;
364         } else {
365                 ast_mutex_unlock(&pgsql_lock);
366                 return 0;
367         }
368 }
369
370 char *key()
371 {
372         return ASTERISK_GPL_KEY;
373 }