aboutsummaryrefslogtreecommitdiffstats
path: root/res/res_config_odbc.c
blob: 8154ecc2b988d1eb862fa045ab2cd81cd47dd4dd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2010, Digium, Inc.
 *
 * Mark Spencer <markster@digium.com>
 *
 * Copyright (C) 2004 - 2005 Anthony Minessale II <anthmct@yahoo.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief odbc+odbc plugin for portable configuration engine
 *
 * \author Mark Spencer <markster@digium.com>
 * \author Anthony Minessale II <anthmct@yahoo.com>
 *
 * \arg http://www.unixodbc.org
 */

/*** MODULEINFO
	<depend>res_odbc</depend>
 ***/

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
#include "asterisk/res_odbc.h"
#include "asterisk/utils.h"
#include "asterisk/stringfields.h"

AST_THREADSTORAGE(sql_buf);

struct custom_prepare_struct {
	const char *sql;
	const char *extra;
	AST_DECLARE_STRING_FIELDS(
		AST_STRING_FIELD(encoding)[256];
	);
	va_list ap;
	unsigned long long skip;
};

static void decode_chunk(char *chunk)
{
	for (; *chunk; chunk++) {
		if (*chunk == '^' && strchr("0123456789ABCDEF", chunk[1]) && strchr("0123456789ABCDEF", chunk[2])) {
			sscanf(chunk + 1, "%02hhX", chunk);
			memmove(chunk + 1, chunk + 3, strlen(chunk + 3) + 1);
		}
	}
}

static SQLHSTMT custom_prepare(struct odbc_obj *obj, void *data)
{
	int res, x = 1, count = 0;
	struct custom_prepare_struct *cps = data;
	const char *newparam, *newval;
	char encodebuf[1024];
	SQLHSTMT stmt;
	va_list ap;

	va_copy(ap, cps->ap);

	res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
		return NULL;
	}

	ast_debug(1, "Skip: %lld; SQL: %s\n", cps->skip, cps->sql);

	res = SQLPrepare(stmt, (unsigned char *)cps->sql, SQL_NTS);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", cps->sql);
		SQLFreeHandle (SQL_HANDLE_STMT, stmt);
		return NULL;
	}

	while ((newparam = va_arg(ap, const char *))) {
		newval = va_arg(ap, const char *);
		if ((1LL << count++) & cps->skip) {
			ast_debug(1, "Skipping field '%s'='%s' (%llo/%llo)\n", newparam, newval, 1LL << (count - 1), cps->skip);
			continue;
		}
		ast_debug(1, "Parameter %d ('%s') = '%s'\n", x, newparam, newval);
		if (strchr(newval, ';') || strchr(newval, '^')) {
			char *eptr = encodebuf;
			const char *vptr = newval;
			for (; *vptr && eptr < encodebuf + sizeof(encodebuf); vptr++) {
				if (strchr("^;", *vptr)) {
					/* We use ^XX, instead of %XX because '%' is a special character in SQL */
					snprintf(eptr, encodebuf + sizeof(encodebuf) - eptr, "^%02hhX", *vptr);
					eptr += 3;
				} else {
					*eptr++ = *vptr;
				}
			}
			if (eptr < encodebuf + sizeof(encodebuf)) {
				*eptr = '\0';
			} else {
				encodebuf[sizeof(encodebuf) - 1] = '\0';
			}
			ast_string_field_set(cps, encoding[x], encodebuf);
			newval = cps->encoding[x];
		}
		SQLBindParameter(stmt, x++, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(newval), 0, (void *)newval, 0, NULL);
	}
	va_end(ap);

	if (!ast_strlen_zero(cps->extra))
		SQLBindParameter(stmt, x++, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(cps->extra), 0, (void *)cps->extra, 0, NULL);
	return stmt;
}

/*!
 * \brief Excute an SQL query and return ast_variable list
 * \param database
 * \param table
 * \param ap list containing one or more field/operator/value set.
 *
 * Select database and preform query on table, prepare the sql statement
 * Sub-in the values to the prepared statement and execute it. Return results
 * as a ast_variable list.
 *
 * \retval var on success
 * \retval NULL on failure
*/
static struct ast_variable *realtime_odbc(const char *database, const char *table, va_list ap)
{
	struct odbc_obj *obj;
	SQLHSTMT stmt;
	char sql[1024];
	char coltitle[256];
	char rowdata[2048];
	char *op;
	const char *newparam;
	char *stringp;
	char *chunk;
	SQLSMALLINT collen;
	int res;
	int x;
	struct ast_variable *var=NULL, *prev=NULL;
	SQLULEN colsize;
	SQLSMALLINT colcount=0;
	SQLSMALLINT datatype;
	SQLSMALLINT decimaldigits;
	SQLSMALLINT nullable;
	SQLLEN indicator;
	va_list aq;
	struct custom_prepare_struct cps = { .sql = sql };
	struct ast_flags connected_flag = { RES_ODBC_CONNECTED };

	if (ast_string_field_init(&cps, 256)) {
		return NULL;
	}
	va_copy(cps.ap, ap);
	va_copy(aq, ap);

	if (!table) {
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	obj = ast_odbc_request_obj2(database, connected_flag);

	if (!obj) {
		ast_log(LOG_ERROR, "No database handle available with the name of '%s' (check res_odbc.conf)\n", database);
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	newparam = va_arg(aq, const char *);
	if (!newparam) {
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}
	va_arg(aq, const char *);
	op = !strchr(newparam, ' ') ? " =" : "";
	snprintf(sql, sizeof(sql), "SELECT * FROM %s WHERE %s%s ?%s", table, newparam, op,
		strcasestr(newparam, "LIKE") && !ast_odbc_backslash_is_escape(obj) ? " ESCAPE '\\'" : "");
	while((newparam = va_arg(aq, const char *))) {
		op = !strchr(newparam, ' ') ? " =" : "";
		snprintf(sql + strlen(sql), sizeof(sql) - strlen(sql), " AND %s%s ?%s", newparam, op,
			strcasestr(newparam, "LIKE") && !ast_odbc_backslash_is_escape(obj) ? " ESCAPE '\\'" : "");
		va_arg(aq, const char *);
	}
	va_end(aq);

	stmt = ast_odbc_prepare_and_execute(obj, custom_prepare, &cps);

	if (!stmt) {
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	res = SQLNumResultCols(stmt, &colcount);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Column Count error!\n[%s]\n\n", sql);
		SQLFreeHandle (SQL_HANDLE_STMT, stmt);
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	res = SQLFetch(stmt);
	if (res == SQL_NO_DATA) {
		SQLFreeHandle (SQL_HANDLE_STMT, stmt);
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Fetch error!\n[%s]\n\n", sql);
		SQLFreeHandle (SQL_HANDLE_STMT, stmt);
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}
	for (x = 0; x < colcount; x++) {
		rowdata[0] = '\0';
		colsize = 0;
		collen = sizeof(coltitle);
		res = SQLDescribeCol(stmt, x + 1, (unsigned char *)coltitle, sizeof(coltitle), &collen, 
					&datatype, &colsize, &decimaldigits, &nullable);
		if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
			ast_log(LOG_WARNING, "SQL Describe Column error!\n[%s]\n\n", sql);
			if (var)
				ast_variables_destroy(var);
			ast_odbc_release_obj(obj);
			ast_string_field_free_memory(&cps);
			return NULL;
		}

		indicator = 0;
		res = SQLGetData(stmt, x + 1, SQL_CHAR, rowdata, sizeof(rowdata), &indicator);
		if (indicator == SQL_NULL_DATA)
			rowdata[0] = '\0';
		else if (ast_strlen_zero(rowdata)) {
			/* Because we encode the empty string for a NULL, we will encode
			 * actual empty strings as a string containing a single whitespace. */
			ast_copy_string(rowdata, " ", sizeof(rowdata));
		}

		if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
			ast_log(LOG_WARNING, "SQL Get Data error!\n[%s]\n\n", sql);
			if (var)
				ast_variables_destroy(var);
			ast_odbc_release_obj(obj);
			return NULL;
		}
		stringp = rowdata;
		while (stringp) {
			chunk = strsep(&stringp, ";");
			if (!ast_strlen_zero(ast_strip(chunk))) {
				if (strchr(chunk, '^')) {
					decode_chunk(chunk);
				}
				if (prev) {
					prev->next = ast_variable_new(coltitle, chunk, "");
					if (prev->next) {
						prev = prev->next;
					}
				} else {
					prev = var = ast_variable_new(coltitle, chunk, "");
				}
			}
		}
	}


	SQLFreeHandle(SQL_HANDLE_STMT, stmt);
	ast_odbc_release_obj(obj);
	ast_string_field_free_memory(&cps);
	return var;
}

/*!
 * \brief Excute an Select query and return ast_config list
 * \param database
 * \param table
 * \param ap list containing one or more field/operator/value set.
 *
 * Select database and preform query on table, prepare the sql statement
 * Sub-in the values to the prepared statement and execute it. 
 * Execute this prepared query against several ODBC connected databases.
 * Return results as an ast_config variable.
 *
 * \retval var on success
 * \retval NULL on failure
*/
static struct ast_config *realtime_multi_odbc(const char *database, const char *table, va_list ap)
{
	struct odbc_obj *obj;
	SQLHSTMT stmt;
	char sql[1024];
	char coltitle[256];
	char rowdata[2048];
	const char *initfield=NULL;
	char *op;
	const char *newparam;
	char *stringp;
	char *chunk;
	SQLSMALLINT collen;
	int res;
	int x;
	struct ast_variable *var=NULL;
	struct ast_config *cfg=NULL;
	struct ast_category *cat=NULL;
	struct ast_flags connected_flag = { RES_ODBC_CONNECTED };
	SQLULEN colsize;
	SQLSMALLINT colcount=0;
	SQLSMALLINT datatype;
	SQLSMALLINT decimaldigits;
	SQLSMALLINT nullable;
	SQLLEN indicator;
	struct custom_prepare_struct cps = { .sql = sql };
	va_list aq;

	if (!table || ast_string_field_init(&cps, 256)) {
		return NULL;
	}
	va_copy(cps.ap, ap);
	va_copy(aq, ap);


	obj = ast_odbc_request_obj2(database, connected_flag);
	if (!obj) {
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	newparam = va_arg(aq, const char *);
	if (!newparam)  {
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}
	initfield = ast_strdupa(newparam);
	if ((op = strchr(initfield, ' '))) 
		*op = '\0';
	va_arg(aq, const char *);
	op = !strchr(newparam, ' ') ? " =" : "";
	snprintf(sql, sizeof(sql), "SELECT * FROM %s WHERE %s%s ?%s", table, newparam, op,
		strcasestr(newparam, "LIKE") && !ast_odbc_backslash_is_escape(obj) ? " ESCAPE '\\'" : "");
	while((newparam = va_arg(aq, const char *))) {
		op = !strchr(newparam, ' ') ? " =" : "";
		snprintf(sql + strlen(sql), sizeof(sql) - strlen(sql), " AND %s%s ?%s", newparam, op,
			strcasestr(newparam, "LIKE") && !ast_odbc_backslash_is_escape(obj) ? " ESCAPE '\\'" : "");
		va_arg(aq, const char *);
	}
	if (initfield)
		snprintf(sql + strlen(sql), sizeof(sql) - strlen(sql), " ORDER BY %s", initfield);
	va_end(aq);

	stmt = ast_odbc_prepare_and_execute(obj, custom_prepare, &cps);

	if (!stmt) {
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	res = SQLNumResultCols(stmt, &colcount);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Column Count error!\n[%s]\n\n", sql);
		SQLFreeHandle(SQL_HANDLE_STMT, stmt);
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	cfg = ast_config_new();
	if (!cfg) {
		ast_log(LOG_WARNING, "Out of memory!\n");
		SQLFreeHandle(SQL_HANDLE_STMT, stmt);
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return NULL;
	}

	while ((res=SQLFetch(stmt)) != SQL_NO_DATA) {
		var = NULL;
		if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
			ast_log(LOG_WARNING, "SQL Fetch error!\n[%s]\n\n", sql);
			continue;
		}
		cat = ast_category_new("","",99999);
		if (!cat) {
			ast_log(LOG_WARNING, "Out of memory!\n");
			continue;
		}
		for (x=0;x<colcount;x++) {
			rowdata[0] = '\0';
			colsize = 0;
			collen = sizeof(coltitle);
			res = SQLDescribeCol(stmt, x + 1, (unsigned char *)coltitle, sizeof(coltitle), &collen, 
						&datatype, &colsize, &decimaldigits, &nullable);
			if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
				ast_log(LOG_WARNING, "SQL Describe Column error!\n[%s]\n\n", sql);
				ast_category_destroy(cat);
				continue;
			}

			indicator = 0;
			res = SQLGetData(stmt, x + 1, SQL_CHAR, rowdata, sizeof(rowdata), &indicator);
			if (indicator == SQL_NULL_DATA)
				continue;

			if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
				ast_log(LOG_WARNING, "SQL Get Data error!\n[%s]\n\n", sql);
				ast_category_destroy(cat);
				continue;
			}
			stringp = rowdata;
			while (stringp) {
				chunk = strsep(&stringp, ";");
				if (!ast_strlen_zero(ast_strip(chunk))) {
					if (strchr(chunk, '^')) {
						decode_chunk(chunk);
					}
					if (initfield && !strcmp(initfield, coltitle)) {
						ast_category_rename(cat, chunk);
					}
					var = ast_variable_new(coltitle, chunk, "");
					ast_variable_append(cat, var);
				}
			}
		}
		ast_category_append(cfg, cat);
	}

	SQLFreeHandle(SQL_HANDLE_STMT, stmt);
	ast_odbc_release_obj(obj);
	ast_string_field_free_memory(&cps);
	return cfg;
}

/*!
 * \brief Excute an UPDATE query
 * \param database
 * \param table
 * \param keyfield where clause field
 * \param lookup value of field for where clause
 * \param ap list containing one or more field/value set(s).
 *
 * Update a database table, prepare the sql statement using keyfield and lookup
 * control the number of records to change. All values to be changed are stored in ap list.
 * Sub-in the values to the prepared statement and execute it.
 *
 * \retval number of rows affected
 * \retval -1 on failure
*/
static int update_odbc(const char *database, const char *table, const char *keyfield, const char *lookup, va_list ap)
{
	struct odbc_obj *obj;
	SQLHSTMT stmt;
	char sql[256];
	SQLLEN rowcount=0;
	const char *newparam;
	int res, count = 1;
	va_list aq;
	struct custom_prepare_struct cps = { .sql = sql, .extra = lookup };
	struct odbc_cache_tables *tableptr;
	struct odbc_cache_columns *column;
	struct ast_flags connected_flag = { RES_ODBC_CONNECTED };

	if (!table) {
		return -1;
	}

	va_copy(cps.ap, ap);
	va_copy(aq, ap);

	if (ast_string_field_init(&cps, 256)) {
		return -1;
	}

	tableptr = ast_odbc_find_table(database, table);
	if (!(obj = ast_odbc_request_obj2(database, connected_flag))) {
		ast_odbc_release_table(tableptr);
		ast_string_field_free_memory(&cps);
		return -1;
	}

	newparam = va_arg(aq, const char *);
	if (!newparam)  {
		ast_odbc_release_obj(obj);
		ast_odbc_release_table(tableptr);
		ast_string_field_free_memory(&cps);
		return -1;
	}
	va_arg(aq, const char *);

	if (tableptr && !(column = ast_odbc_find_column(tableptr, newparam))) {
		ast_log(LOG_WARNING, "Key field '%s' does not exist in table '%s@%s'.  Update will fail\n", newparam, table, database);
	}

	snprintf(sql, sizeof(sql), "UPDATE %s SET %s=?", table, newparam);
	while((newparam = va_arg(aq, const char *))) {
		va_arg(aq, const char *);
		if ((tableptr && (column = ast_odbc_find_column(tableptr, newparam))) || count > 63) {
			snprintf(sql + strlen(sql), sizeof(sql) - strlen(sql), ", %s=?", newparam);
		} else { /* the column does not exist in the table */
			cps.skip |= (1LL << count);
		}
		count++;
	}
	va_end(aq);
	snprintf(sql + strlen(sql), sizeof(sql) - strlen(sql), " WHERE %s=?", keyfield);
	ast_odbc_release_table(tableptr);

	stmt = ast_odbc_prepare_and_execute(obj, custom_prepare, &cps);

	if (!stmt) {
		ast_odbc_release_obj(obj);
		ast_string_field_free_memory(&cps);
		return -1;
	}

	res = SQLRowCount(stmt, &rowcount);
	SQLFreeHandle (SQL_HANDLE_STMT, stmt);
	ast_odbc_release_obj(obj);
	ast_string_field_free_memory(&cps);

	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Row Count error!\n[%s]\n\n", sql);
		return -1;
	}

	if (rowcount >= 0) {
		return (int) rowcount;
	}

	return -1;
}

struct update2_prepare_struct {
	const char *database;
	const char *table;
	va_list ap;
};

static SQLHSTMT update2_prepare(struct odbc_obj *obj, void *data)
{
	int res, x = 1, first = 1;
	struct update2_prepare_struct *ups = data;
	const char *newparam, *newval;
	struct ast_str *sql = ast_str_thread_get(&sql_buf, 16);
	SQLHSTMT stmt;
	va_list ap;
	struct odbc_cache_tables *tableptr = ast_odbc_find_table(ups->database, ups->table);
	struct odbc_cache_columns *column;

	if (!sql) {
		if (tableptr) {
			ast_odbc_release_table(tableptr);
		}
		return NULL;
	}

	if (!tableptr) {
		ast_log(LOG_ERROR, "Could not retrieve metadata for table '%s@%s'.  Update will fail!\n", ups->table, ups->database);
		return NULL;
	}

	res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
		ast_odbc_release_table(tableptr);
		return NULL;
	}

	ast_str_set(&sql, 0, "UPDATE %s SET ", ups->table);

	/* Start by finding the second set of parameters */
	va_copy(ap, ups->ap);

	while ((newparam = va_arg(ap, const char *))) {
		newval = va_arg(ap, const char *);
	}

	while ((newparam = va_arg(ap, const char *))) {
		newval = va_arg(ap, const char *);
		if ((column = ast_odbc_find_column(tableptr, newparam))) {
			ast_str_append(&sql, 0, "%s%s=? ", first ? "" : ", ", newparam);
			SQLBindParameter(stmt, x++, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(newval), 0, (void *)newval, 0, NULL);
			first = 0;
		} else {
			ast_log(LOG_NOTICE, "Not updating column '%s' in '%s@%s' because that column does not exist!\n", newparam, ups->table, ups->database);
		}
	}
	va_end(ap);

	/* Restart search, because we need to add the search parameters */
	va_copy(ap, ups->ap);
	ast_str_append(&sql, 0, "WHERE");
	first = 1;

	while ((newparam = va_arg(ap, const char *))) {
		newval = va_arg(ap, const char *);
		if (!(column = ast_odbc_find_column(tableptr, newparam))) {
			ast_log(LOG_ERROR, "One or more of the criteria columns '%s' on '%s@%s' for this update does not exist!\n", newparam, ups->table, ups->database);
			ast_odbc_release_table(tableptr);
			SQLFreeHandle(SQL_HANDLE_STMT, stmt);
			return NULL;
		}
		ast_str_append(&sql, 0, "%s %s=?", first ? "" : " AND", newparam);
		SQLBindParameter(stmt, x++, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(newval), 0, (void *)newval, 0, NULL);
		first = 0;
	}
	va_end(ap);

	/* Done with the table metadata */
	ast_odbc_release_table(tableptr);

	res = SQLPrepare(stmt, (unsigned char *)ast_str_buffer(sql), SQL_NTS);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", ast_str_buffer(sql));
		SQLFreeHandle(SQL_HANDLE_STMT, stmt);
		return NULL;
	}

	return stmt;
}

/*!
 * \brief Execute an UPDATE query
 * \param database
 * \param table
 * \param ap list containing one or more field/value set(s).
 *
 * Update a database table, preparing the sql statement from a list of
 * key/value pairs specified in ap.  The lookup pairs are specified first
 * and are separated from the update pairs by a sentinel value.
 * Sub-in the values to the prepared statement and execute it.
 *
 * \retval number of rows affected
 * \retval -1 on failure
*/
static int update2_odbc(const char *database, const char *table, va_list ap)
{
	struct odbc_obj *obj;
	SQLHSTMT stmt;
	struct update2_prepare_struct ups = { .database = database, .table = table, };
	struct ast_str *sql;
	int res;
	SQLLEN rowcount = 0;

	va_copy(ups.ap, ap);

	if (!(obj = ast_odbc_request_obj(database, 0))) {
		return -1;
	}

	if (!(stmt = ast_odbc_prepare_and_execute(obj, update2_prepare, &ups))) {
		ast_odbc_release_obj(obj);
		return -1;
	}

	res = SQLRowCount(stmt, &rowcount);
	SQLFreeHandle(SQL_HANDLE_STMT, stmt);
	ast_odbc_release_obj(obj);

	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		/* Since only a single thread can access this memory, we can retrieve what would otherwise be lost. */
		sql = ast_str_thread_get(&sql_buf, 16);
		ast_log(LOG_WARNING, "SQL Row Count error!\n[%s]\n", ast_str_buffer(sql));
		return -1;
	}

	if (rowcount >= 0) {
		return (int)rowcount;
	}

	return -1;
}

/*!
 * \brief Excute an INSERT query
 * \param database
 * \param table
 * \param ap list containing one or more field/value set(s)
 *
 * Insert a new record into database table, prepare the sql statement.
 * All values to be changed are stored in ap list.
 * Sub-in the values to the prepared statement and execute it.
 *
 * \retval number of rows affected
 * \retval -1 on failure
*/
static int store_odbc(const char *database, const char *table, va_list ap)
{
	struct odbc_obj *obj;
	SQLHSTMT stmt;
	char sql[256];
	char keys[256];
	char vals[256];
	SQLLEN rowcount=0;
	const char *newparam;
	int res;
	va_list aq;
	struct custom_prepare_struct cps = { .sql = sql, .extra = NULL };
	struct ast_flags connected_flag = { RES_ODBC_CONNECTED };

	va_copy(cps.ap, ap);
	va_copy(aq, ap);
	
	if (!table)
		return -1;

	obj = ast_odbc_request_obj2(database, connected_flag);
	if (!obj)
		return -1;

	newparam = va_arg(aq, const char *);
	if (!newparam)  {
		ast_odbc_release_obj(obj);
		return -1;
	}
	va_arg(aq, const char *);
	snprintf(keys, sizeof(keys), "%s", newparam);
	ast_copy_string(vals, "?", sizeof(vals));
	while ((newparam = va_arg(aq, const char *))) {
		snprintf(keys + strlen(keys), sizeof(keys) - strlen(keys), ", %s", newparam);
		snprintf(vals + strlen(vals), sizeof(vals) - strlen(vals), ", ?");
		va_arg(aq, const char *);
	}
	va_end(aq);
	snprintf(sql, sizeof(sql), "INSERT INTO %s (%s) VALUES (%s)", table, keys, vals);

	stmt = ast_odbc_prepare_and_execute(obj, custom_prepare, &cps);

	if (!stmt) {
		ast_odbc_release_obj(obj);
		return -1;
	}

	res = SQLRowCount(stmt, &rowcount);
	SQLFreeHandle (SQL_HANDLE_STMT, stmt);
	ast_odbc_release_obj(obj);

	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Row Count error!\n[%s]\n\n", sql);
		return -1;
	}

	if (rowcount >= 0)
		return (int)rowcount;

	return -1;
}

/*!
 * \brief Excute an DELETE query
 * \param database
 * \param table
 * \param keyfield where clause field
 * \param lookup value of field for where clause
 * \param ap list containing one or more field/value set(s)
 *
 * Delete a row from a database table, prepare the sql statement using keyfield and lookup
 * control the number of records to change. Additional params to match rows are stored in ap list.
 * Sub-in the values to the prepared statement and execute it.
 *
 * \retval number of rows affected
 * \retval -1 on failure
*/
static int destroy_odbc(const char *database, const char *table, const char *keyfield, const char *lookup, va_list ap)
{
	struct odbc_obj *obj;
	SQLHSTMT stmt;
	char sql[256];
	SQLLEN rowcount=0;
	const char *newparam;
	int res;
	va_list aq;
	struct custom_prepare_struct cps = { .sql = sql, .extra = lookup };
	struct ast_flags connected_flag = { RES_ODBC_CONNECTED };

	va_copy(cps.ap, ap);
	va_copy(aq, ap);
	
	if (!table)
		return -1;

	obj = ast_odbc_request_obj2(database, connected_flag);
	if (!obj)
		return -1;

	snprintf(sql, sizeof(sql), "DELETE FROM %s WHERE ", table);
	while((newparam = va_arg(aq, const char *))) {
		snprintf(sql + strlen(sql), sizeof(sql) - strlen(sql), "%s=? AND ", newparam);
		va_arg(aq, const char *);
	}
	va_end(aq);
	snprintf(sql + strlen(sql), sizeof(sql) - strlen(sql), "%s=?", keyfield);

	stmt = ast_odbc_prepare_and_execute(obj, custom_prepare, &cps);

	if (!stmt) {
		ast_odbc_release_obj(obj);
		return -1;
	}

	res = SQLRowCount(stmt, &rowcount);
	SQLFreeHandle (SQL_HANDLE_STMT, stmt);
	ast_odbc_release_obj(obj);

	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL Row Count error!\n[%s]\n\n", sql);
		return -1;
	}

	if (rowcount >= 0)
		return (int)rowcount;

	return -1;
}


struct config_odbc_obj {
	char *sql;
	unsigned long cat_metric;
	char category[128];
	char var_name[128];
	char var_val[1024]; /* changed from 128 to 1024 via bug 8251 */
	SQLLEN err;
};

static SQLHSTMT config_odbc_prepare(struct odbc_obj *obj, void *data)
{
	struct config_odbc_obj *q = data;
	SQLHSTMT sth;
	int res;

	res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &sth);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_verb(4, "Failure in AllocStatement %d\n", res);
		return NULL;
	}

	res = SQLPrepare(sth, (unsigned char *)q->sql, SQL_NTS);
	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_verb(4, "Error in PREPARE %d\n", res);
		SQLFreeHandle(SQL_HANDLE_STMT, sth);
		return NULL;
	}

	SQLBindCol(sth, 1, SQL_C_ULONG, &q->cat_metric, sizeof(q->cat_metric), &q->err);
	SQLBindCol(sth, 2, SQL_C_CHAR, q->category, sizeof(q->category), &q->err);
	SQLBindCol(sth, 3, SQL_C_CHAR, q->var_name, sizeof(q->var_name), &q->err);
	SQLBindCol(sth, 4, SQL_C_CHAR, q->var_val, sizeof(q->var_val), &q->err);

	return sth;
}

static struct ast_config *config_odbc(const char *database, const char *table, const char *file, struct ast_config *cfg, struct ast_flags flags, const char *sugg_incl, const char *who_asked)
{
	struct ast_variable *new_v;
	struct ast_category *cur_cat;
	int res = 0;
	struct odbc_obj *obj;
	char sqlbuf[1024] = "";
	char *sql = sqlbuf;
	size_t sqlleft = sizeof(sqlbuf);
	unsigned int last_cat_metric = 0;
	SQLSMALLINT rowcount = 0;
	SQLHSTMT stmt;
	char last[128] = "";
	struct config_odbc_obj q;
	struct ast_flags loader_flags = { 0 };
	struct ast_flags connected_flag = { RES_ODBC_CONNECTED };

	memset(&q, 0, sizeof(q));

	if (!file || !strcmp (file, "res_config_odbc.conf"))
		return NULL;		/* cant configure myself with myself ! */

	obj = ast_odbc_request_obj2(database, connected_flag);
	if (!obj)
		return NULL;

	ast_build_string(&sql, &sqlleft, "SELECT cat_metric, category, var_name, var_val FROM %s ", table);
	ast_build_string(&sql, &sqlleft, "WHERE filename='%s' AND commented=0 ", file);
	ast_build_string(&sql, &sqlleft, "ORDER BY cat_metric DESC, var_metric ASC, category, var_name ");
	q.sql = sqlbuf;

	stmt = ast_odbc_prepare_and_execute(obj, config_odbc_prepare, &q);

	if (!stmt) {
		ast_log(LOG_WARNING, "SQL select error!\n[%s]\n\n", sql);
		ast_odbc_release_obj(obj);
		return NULL;
	}

	res = SQLNumResultCols(stmt, &rowcount);

	if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
		ast_log(LOG_WARNING, "SQL NumResultCols error!\n[%s]\n\n", sql);
		SQLFreeHandle(SQL_HANDLE_STMT, stmt);
		ast_odbc_release_obj(obj);
		return NULL;
	}

	if (!rowcount) {
		ast_log(LOG_NOTICE, "found nothing\n");
		ast_odbc_release_obj(obj);
		return cfg;
	}

	cur_cat = ast_config_get_current_category(cfg);

	while ((res = SQLFetch(stmt)) != SQL_NO_DATA) {
		if (!strcmp (q.var_name, "#include")) {
			if (!ast_config_internal_load(q.var_val, cfg, loader_flags, "", who_asked)) {
				SQLFreeHandle(SQL_HANDLE_STMT, stmt);
				ast_odbc_release_obj(obj);
				return NULL;
			}
			continue;
		} 
		if (strcmp(last, q.category) || last_cat_metric != q.cat_metric) {
			cur_cat = ast_category_new(q.category, "", 99999);
			if (!cur_cat) {
				ast_log(LOG_WARNING, "Out of memory!\n");
				break;
			}
			strcpy(last, q.category);
			last_cat_metric	= q.cat_metric;
			ast_category_append(cfg, cur_cat);
		}

		new_v = ast_variable_new(q.var_name, q.var_val, "");
		ast_variable_append(cur_cat, new_v);
	}

	SQLFreeHandle(SQL_HANDLE_STMT, stmt);
	ast_odbc_release_obj(obj);
	return cfg;
}

#define warn_length(col, size)	ast_log(LOG_WARNING, "Realtime table %s@%s: column '%s' is not long enough to contain realtime data (needs %d)\n", table, database, col->name, size)
#define warn_type(col, type)	ast_log(LOG_WARNING, "Realtime table %s@%s: column '%s' is of the incorrect type (%d) to contain the required realtime data\n", table, database, col->name, col->type)

static int require_odbc(const char *database, const char *table, va_list ap)
{
	struct odbc_cache_tables *tableptr = ast_odbc_find_table(database, table);
	struct odbc_cache_columns *col;
	char *elm;
	int type, size;

	if (!tableptr) {
		return -1;
	}

	while ((elm = va_arg(ap, char *))) {
		type = va_arg(ap, require_type);
		size = va_arg(ap, int);
		/* Check if the field matches the criteria */
		AST_RWLIST_TRAVERSE(&tableptr->columns, col, list) {
			if (strcmp(col->name, elm) == 0) {
				/* Type check, first.  Some fields are more particular than others */
				switch (col->type) {
				case SQL_CHAR:
				case SQL_VARCHAR:
				case SQL_LONGVARCHAR:
#ifdef HAVE_ODBC_WCHAR
				case SQL_WCHAR:
				case SQL_WVARCHAR:
				case SQL_WLONGVARCHAR:
#endif
				case SQL_BINARY:
				case SQL_VARBINARY:
				case SQL_LONGVARBINARY:
				case SQL_GUID:
#define CHECK_SIZE(n) \
						if (col->size < n) {      \
							warn_length(col, n);  \
						}                         \
						break;
					switch (type) {
					case RQ_UINTEGER1: CHECK_SIZE(3)  /*         255 */
					case RQ_INTEGER1:  CHECK_SIZE(4)  /*        -128 */
					case RQ_UINTEGER2: CHECK_SIZE(5)  /*       65535 */
					case RQ_INTEGER2:  CHECK_SIZE(6)  /*      -32768 */
					case RQ_UINTEGER3:                /*    16777215 */
					case RQ_INTEGER3:  CHECK_SIZE(8)  /*    -8388608 */
					case RQ_DATE:                     /*  2008-06-09 */
					case RQ_UINTEGER4: CHECK_SIZE(10) /*  4200000000 */
					case RQ_INTEGER4:  CHECK_SIZE(11) /* -2100000000 */
					case RQ_DATETIME:                 /* 2008-06-09 16:03:47 */
					case RQ_UINTEGER8: CHECK_SIZE(19) /* trust me    */
					case RQ_INTEGER8:  CHECK_SIZE(20) /* ditto       */
					case RQ_FLOAT:
					case RQ_CHAR:      CHECK_SIZE(size)
					}
#undef CHECK_SIZE
					break;
				case SQL_TYPE_DATE:
					if (type != RQ_DATE) {
						warn_type(col, type);
					}
					break;
				case SQL_TYPE_TIMESTAMP:
				case SQL_TIMESTAMP:
					if (type != RQ_DATE && type != RQ_DATETIME) {
						warn_type(col, type);
					}
					break;
				case SQL_BIT:
					warn_length(col, size);
					break;
#define WARN_TYPE_OR_LENGTH(n)	\
						if (!ast_rq_is_int(type)) {  \
							warn_type(col, type);    \
						} else {                     \
							warn_length(col, n);  \
						}
				case SQL_TINYINT:
					if (type != RQ_UINTEGER1) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
				case SQL_C_STINYINT:
					if (type != RQ_INTEGER1) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
				case SQL_C_USHORT:
					if (type != RQ_UINTEGER1 && type != RQ_INTEGER1 && type != RQ_UINTEGER2) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
				case SQL_SMALLINT:
				case SQL_C_SSHORT:
					if (type != RQ_UINTEGER1 && type != RQ_INTEGER1 && type != RQ_INTEGER2) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
				case SQL_C_ULONG:
					if (type != RQ_UINTEGER1 && type != RQ_INTEGER1 &&
						type != RQ_UINTEGER2 && type != RQ_INTEGER2 &&
						type != RQ_UINTEGER3 && type != RQ_INTEGER3 &&
						type != RQ_INTEGER4) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
				case SQL_INTEGER:
				case SQL_C_SLONG:
					if (type != RQ_UINTEGER1 && type != RQ_INTEGER1 &&
						type != RQ_UINTEGER2 && type != RQ_INTEGER2 &&
						type != RQ_UINTEGER3 && type != RQ_INTEGER3 &&
						type != RQ_INTEGER4) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
				case SQL_C_UBIGINT:
					if (type != RQ_UINTEGER1 && type != RQ_INTEGER1 &&
						type != RQ_UINTEGER2 && type != RQ_INTEGER2 &&
						type != RQ_UINTEGER3 && type != RQ_INTEGER3 &&
						type != RQ_UINTEGER4 && type != RQ_INTEGER4 &&
						type != RQ_INTEGER8) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
				case SQL_BIGINT:
				case SQL_C_SBIGINT:
					if (type != RQ_UINTEGER1 && type != RQ_INTEGER1 &&
						type != RQ_UINTEGER2 && type != RQ_INTEGER2 &&
						type != RQ_UINTEGER3 && type != RQ_INTEGER3 &&
						type != RQ_UINTEGER4 && type != RQ_INTEGER4 &&
						type != RQ_INTEGER8) {
						WARN_TYPE_OR_LENGTH(size)
					}
					break;
#undef WARN_TYPE_OR_LENGTH
				case SQL_NUMERIC:
				case SQL_DECIMAL:
				case SQL_FLOAT:
				case SQL_REAL:
				case SQL_DOUBLE:
					if (!ast_rq_is_int(type) && type != RQ_FLOAT) {
						warn_type(col, type);
					}
					break;
				default:
					ast_log(LOG_WARNING, "Realtime table %s@%s: column type (%d) unrecognized for column '%s'\n", table, database, col->type, elm);
				}
				break;
			}
		}
		if (!col) {
			ast_log(LOG_WARNING, "Realtime table %s@%s requires column '%s', but that column does not exist!\n", table, database, elm);
		}
	}
	va_end(ap);
	AST_RWLIST_UNLOCK(&tableptr->columns);
	return 0;
}
#undef warn_length
#undef warn_type

static struct ast_config_engine odbc_engine = {
	.name = "odbc",
	.load_func = config_odbc,
	.realtime_func = realtime_odbc,
	.realtime_multi_func = realtime_multi_odbc,
	.store_func = store_odbc,
	.destroy_func = destroy_odbc,
	.update_func = update_odbc,
	.update2_func = update2_odbc,
	.require_func = require_odbc,
	.unload_func = ast_odbc_clear_cache,
};

static int unload_module (void)
{
	ast_config_engine_deregister(&odbc_engine);

	ast_verb(1, "res_config_odbc unloaded.\n");
	return 0;
}

static int load_module (void)
{
	ast_config_engine_register(&odbc_engine);
	ast_verb(1, "res_config_odbc loaded.\n");
	return 0;
}

static int reload_module(void)
{
	return 0;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Realtime ODBC configuration",
		.load = load_module,
		.unload = unload_module,
		.reload = reload_module,
		.load_pri = AST_MODPRI_REALTIME_DRIVER,
		);