/
b2b_logic.c
1710 lines (1526 loc) · 42.9 KB
/
b2b_logic.c
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
/*
* back-to-back logic module
*
* Copyright (C) 2009 Free Software Fundation
*
* This file is part of opensips, a free SIP server.
*
* opensips is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* opensips is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* History:
* --------
* 2009-08-03 initial version (Anca Vamanu)
* 2010-11-02 new mi function: mi_b2b_list (Ovidiu Sas)
* 2010-11-12 new cmd: b2b_bridge_request (Ovidiu Sas)
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <libxml/parser.h>
#include "../../db/db.h"
#include "../../sr_module.h"
#include "../../dprint.h"
#include "../../error.h"
#include "../../parser/parse_from.h"
#include "../../parser/parse_content.h"
#include "../../ut.h"
#include "../../trim.h"
#include "../../mem/mem.h"
#include "../../mod_fix.h"
#include "records.h"
#include "pidf.h"
#include "b2b_logic.h"
#include "b2b_load.h"
#include "b2bl_db.h"
#define TABLE_VERSION 3
/** Functions declarations */
static int mod_init(void);
static void mod_destroy(void);
static int child_init(int rank);
static int load_script_scenario(modparam_t type, void* val);
static int load_extern_scenario(modparam_t type, void* val);
static int fixup_b2b_logic(void** param, int param_no);
static struct mi_root* mi_trigger_scenario(struct mi_root* cmd, void* param);
static struct mi_root* mi_b2b_bridge(struct mi_root* cmd, void* param);
static struct mi_root* mi_b2b_list(struct mi_root* cmd, void* param);
static struct mi_root* mi_b2b_terminate_call(struct mi_root* cmd, void* param);
static void b2bl_clean(unsigned int ticks, void* param);
static void b2bl_db_timer_update(unsigned int ticks, void* param);
int b2b_init_request(struct sip_msg* msg, str* arg1, str* arg2, str* arg3,
str* arg4, str* arg5, str* arg6);
int b2b_bridge_request(struct sip_msg* msg, str* arg1, str* arg2);
void b2b_mark_todel( b2bl_tuple_t* tuple);
/** Global variables */
b2b_api_t b2b_api;
b2bl_table_t b2bl_htable;
unsigned int b2bl_hsize = 10;
b2b_scenario_t* script_scenarios = NULL;
b2b_scenario_t* extern_scenarios = NULL;
unsigned int b2b_clean_period = 100;
unsigned int b2b_update_period = 100;
str custom_headers = {0, 0};
str custom_headers_lst[HDR_LST_LEN];
int custom_headers_lst_len =0;
str custom_headers_regexp = {0, 0};
regex_t* custom_headers_re;
/* The list of the headers that are passed on the other side by default */
static str default_headers[HDR_DEFAULT_LEN]=
{
{"Content-Type",12},
{"Supported", 9},
{"Allow", 5},
{"Proxy-Require", 13},
{"Session-Expires", 15},
{"Min-SE", 6},
{"Require", 7},
{"RSeq", 4},
};
int use_init_sdp = 0;
enum b2bl_caller_type b2bl_caller;
unsigned int max_duration = 12*3600;
int b2bl_key_avp_name;
unsigned short b2bl_key_avp_type;
static str b2bl_key_avp_param = {NULL, 0};
static str b2bl_from_spec_param = {NULL, 0};
static pv_spec_t b2bl_from_spec;
static pv_value_t b2bl_from_tok;
static struct to_body b2bl_from;
#define B2BL_FROM_BUF_LEN 255
static char b2bl_from_buf[B2BL_FROM_BUF_LEN + 1];
str db_url= {0, 0};
db_con_t *b2bl_db = NULL;
db_func_t b2bl_dbf;
str b2bl_dbtable= str_init("b2b_logic");
str init_callid_hdr={0, 0};
str server_address = {0, 0};
int b2bl_db_mode = WRITE_BACK;
int unsigned b2bl_th_init_timeout = 60;
/** Exported functions */
static cmd_export_t cmds[]=
{
{"b2b_init_request", (cmd_function)b2b_init_request, 5 , fixup_b2b_logic , 0 , REQUEST_ROUTE},
{"b2b_init_request", (cmd_function)b2b_init_request, 4 , fixup_b2b_logic , 0 , REQUEST_ROUTE},
{"b2b_init_request", (cmd_function)b2b_init_request, 3 , fixup_b2b_logic , 0 , REQUEST_ROUTE},
{"b2b_init_request", (cmd_function)b2b_init_request, 2 , fixup_b2b_logic , 0 , REQUEST_ROUTE},
{"b2b_init_request", (cmd_function)b2b_init_request, 1 , fixup_b2b_logic , 0 , REQUEST_ROUTE},
{"b2b_init_request", (cmd_function)b2b_init_request, 0 , 0 , 0 , REQUEST_ROUTE},
{"b2b_bridge_request",(cmd_function)b2b_bridge_request,2,fixup_pvar_pvar , 0 , REQUEST_ROUTE},
{"b2b_logic_bind", (cmd_function)b2b_logic_bind, 1 , 0, 0, 0},
{ 0, 0, 0 , 0 , 0, 0}
};
/** Exported parameters */
static param_export_t params[]=
{
{"hash_size", INT_PARAM, &b2bl_hsize },
{"cleanup_period", INT_PARAM, &b2b_clean_period },
{"update_period", INT_PARAM, &b2b_update_period },
{"script_scenario", STR_PARAM|USE_FUNC_PARAM, (void*)load_script_scenario},
{"extern_scenario", STR_PARAM|USE_FUNC_PARAM, (void*)load_extern_scenario},
{"custom_headers", STR_PARAM, &custom_headers.s },
{"custom_headers_regexp", STR_PARAM, &custom_headers_regexp.s },
{"use_init_sdp", INT_PARAM, &use_init_sdp },
{"db_url", STR_PARAM, &db_url.s },
{"db_table", STR_PARAM, &b2bl_dbtable.s },
{"max_duration", INT_PARAM, &max_duration },
/*
{"b2bl_key_avp", STR_PARAM, &b2bl_key_avp_param.s },
*/
{"b2bl_from_spec_param",STR_PARAM, &b2bl_from_spec_param.s },
{"server_address", STR_PARAM, &server_address.s },
{"init_callid_hdr", STR_PARAM, &init_callid_hdr.s },
{"db_mode", INT_PARAM, &b2bl_db_mode },
{"b2bl_th_init_timeout",INT_PARAM, &b2bl_th_init_timeout },
{0, 0, 0 }
};
/** MI commands */
static mi_export_t mi_cmds[] = {
{ "b2b_trigger_scenario", 0, mi_trigger_scenario, 0, 0, 0},
{ "b2b_bridge", 0, mi_b2b_bridge, 0, 0, 0},
{ "b2b_list", 0, mi_b2b_list, 0, 0, 0},
{ "b2b_terminate_call", 0, mi_b2b_terminate_call, 0, 0, 0},
{ 0, 0, 0, 0, 0, 0}
};
static dep_export_t deps = {
{ /* OpenSIPS module dependencies */
{ MOD_TYPE_DEFAULT, "b2b_entities", DEP_ABORT },
{ MOD_TYPE_NULL, NULL, 0 },
},
{ /* modparam dependencies */
{ "db_url", get_deps_sqldb_url },
{ NULL, NULL },
},
};
/** Module interface */
struct module_exports exports= {
"b2b_logic", /* module name */
MOD_TYPE_DEFAULT, /* class of this module */
MODULE_VERSION, /* module version */
DEFAULT_DLFLAGS, /* dlopen flags */
0, /* load function */
&deps, /* OpenSIPS module dependencies */
cmds, /* exported functions */
0, /* exported async functions */
params, /* exported parameters */
0, /* exported statistics */
mi_cmds, /* exported MI functions */
0, /* exported pseudo-variables */
0, /* exported transformations */
0, /* extra processes */
mod_init, /* module initialization function */
(response_function) 0, /* response handling function */
(destroy_function) mod_destroy, /* destroy function */
child_init /* per-child init function */
};
/** Module init function */
static int mod_init(void)
{
char* p = NULL;
char* flags = NULL;
int regexp_flags = 0;
int i = 0, j;
pv_spec_t avp_spec;
LM_DBG("start\n");
/* load b2b_entities api */
if(load_b2b_api(&b2b_api)< 0)
{
LM_ERR("Failed to load b2b api\n");
return -1;
}
if(b2bl_hsize< 1 || b2bl_hsize> 20)
{
LM_ERR("Wrong hash size. Needs to be greater than 1"
" and smaller than 20. Be aware that you should set the log 2"
" value of the real size\n");
return -1;
}
b2bl_hsize = 1<<b2bl_hsize;
if(server_address.s == NULL)
{
if(extern_scenarios)
{
LM_ERR("'server_address' parameter not set. This parameter is"
" compulsory if you want to use extern scenarios. It must"
" be set to the IP address of the machine\n");
return -1;
}
}
else
server_address.len = strlen(server_address.s);
if(init_b2bl_htable() < 0)
{
LM_ERR("Failed to initialize b2b logic hash table\n");
return -1;
}
if(b2bl_db_mode && db_url.s)
{
db_url.len = strlen(db_url.s);
b2bl_dbtable.len = strlen(b2bl_dbtable.s);
/* binding to database module */
if (db_bind_mod(&db_url, &b2bl_dbf))
{
LM_ERR("Database module not found\n");
return -1;
}
if (!DB_CAPABILITY(b2bl_dbf, DB_CAP_ALL))
{
LM_ERR("Database module does not implement all functions"
" needed by b2b_entities module\n");
return -1;
}
b2bl_db = b2bl_dbf.init(&db_url);
if(!b2bl_db)
{
LM_ERR("connecting to database failed\n");
return -1;
}
/*verify table versions */
if(db_check_table_version(&b2bl_dbf, b2bl_db, &b2bl_dbtable, TABLE_VERSION) < 0)
{
LM_ERR("error during table version check\n");
return -1;
}
b2bl_db_init();
/* reload data */
if(b2b_logic_restore() < 0)
{
LM_ERR("Failed to restore data from database\n");
return -1;
}
if(b2bl_db)
b2bl_dbf.close(b2bl_db);
b2bl_db = NULL;
}
else
b2bl_db_mode = 0;
if (b2bl_key_avp_param.s)
b2bl_key_avp_param.len = strlen(b2bl_key_avp_param.s);
if (b2bl_key_avp_param.s && b2bl_key_avp_param.len > 0)
{
if (pv_parse_spec(&b2bl_key_avp_param, &avp_spec)==0 || avp_spec.type!=PVT_AVP) {
LM_ERR("malformed or non AVP %.*s AVP definition\n",
b2bl_key_avp_param.len, b2bl_key_avp_param.s);
return -1;
}
if (pv_get_avp_name(0, &(avp_spec.pvp), &b2bl_key_avp_name, &b2bl_key_avp_type)!=0){
LM_ERR("[%.*s]- invalid AVP definition\n", b2bl_key_avp_param.len,
b2bl_key_avp_param.s);
return -1;
}
} else {
b2bl_key_avp_name = -1;
b2bl_key_avp_type = 0;
}
if(b2bl_from_spec_param.s)
{
b2bl_from_spec_param.len = strlen(b2bl_from_spec_param.s);
if(pv_parse_spec(&b2bl_from_spec_param, &b2bl_from_spec)==NULL)
{
LM_ERR("failed to parse b2bl_from spec\n");
return E_CFG;
}
switch(b2bl_from_spec.type) {
case PVT_NONE:
case PVT_EMPTY:
case PVT_NULL:
case PVT_MARKER:
case PVT_COLOR:
LM_ERR("invalid b2bl_from spec\n");
return -1;
default: ;
}
}
/* parse extra headers */
if(custom_headers.s)
custom_headers.len = strlen(custom_headers.s);
memset(custom_headers_lst, 0, HDR_LST_LEN*sizeof(str));
custom_headers_lst[i].s = custom_headers.s;
if(custom_headers.s)
{
p = strchr(custom_headers.s, ';');
while(p)
{
custom_headers_lst[i].len = p - custom_headers_lst[i].s;
/* check if this is among the default headers */
for(j = 0; j< HDR_DEFAULT_LEN; j++)
{
if(custom_headers_lst[i].len == default_headers[j].len &&
strncmp(custom_headers_lst[i].s, default_headers[j].s,
default_headers[j].len)== 0)
goto next_hdr;
}
/* check if defined twice */
for(j = 0; j< i; j++)
{
if(custom_headers_lst[i].len == custom_headers_lst[j].len &&
strncmp(custom_headers_lst[i].s, custom_headers_lst[j].s,
custom_headers_lst[j].len)== 0)
goto next_hdr;
}
i++;
if(i == HDR_LST_LEN)
{
LM_ERR("Too many extra headers defined."
" The maximum value is %d\n.", HDR_LST_LEN);
return -1;
}
next_hdr:
p++;
if(p-custom_headers.s >= custom_headers.len)
break;
custom_headers_lst[i].s = p;
p = strchr(p, ';');
}
}
if(p == NULL)
{
custom_headers_lst[i].len = custom_headers.s + custom_headers.len
- custom_headers_lst[i].s;
if(custom_headers_lst[i].len == 0)
i--;
}
custom_headers_lst_len = i +1;
if(custom_headers_regexp.s)
{
custom_headers_regexp.len = strlen(custom_headers_regexp.s);
if ((custom_headers_re=pkg_malloc(sizeof(regex_t)))==0) {
LM_ERR("no more pkg memory\n");
return -1;
}
if (*custom_headers_regexp.s == '/')
{
flags = (char *)memchr(custom_headers_regexp.s+1, '/',
custom_headers_regexp.len-1);
if (flags)
{
custom_headers_regexp.s++;
custom_headers_regexp.len = flags - custom_headers_regexp.s;
custom_headers_regexp.s[custom_headers_regexp.len] = '\0';
flags++;
while(*flags != '\0')
{
switch (*flags) {
case 'i':
regexp_flags |= REG_ICASE;
break;
case 'e':
regexp_flags |= REG_EXTENDED;
break;
default:
LM_ERR("Unknown option '%c'\n", *flags);
}
flags++;
}
} else {
LM_ERR("Second '/' missing from regexp\n");
return -1;
}
}
if (regcomp(custom_headers_re, custom_headers_regexp.s,
regexp_flags) != 0) {
pkg_free(custom_headers_re);
LM_ERR("bad regexp '%.*s'\n",
custom_headers_regexp.len, custom_headers_regexp.s);
return -1;
}
}
if(init_callid_hdr.s)
init_callid_hdr.len = strlen(init_callid_hdr.s);
register_timer("b2bl-clean", b2bl_clean, 0, b2b_clean_period,
TIMER_FLAG_DELAY_ON_DELAY);
if(b2bl_db_mode == WRITE_BACK)
register_timer("b2bl-dbupdate", b2bl_db_timer_update, 0,
b2b_update_period, TIMER_FLAG_SKIP_ON_DELAY);
return 0;
}
void b2bl_db_timer_update(unsigned int ticks, void* param)
{
b2b_logic_dump(0);
}
void b2bl_clean(unsigned int ticks, void* param)
{
int i;
b2bl_tuple_t* tuple, *tuple_next;
unsigned int now;
str bye = {BYE, BYE_LEN};
b2b_req_data_t req_data;
now = get_ticks();
for(i = 0; i< b2bl_hsize; i++)
{
lock_get(&b2bl_htable[i].lock);
tuple = b2bl_htable[i].first;
while(tuple)
{
tuple_next = tuple->next;
if(tuple->lifetime > 0 && tuple->lifetime < now)
{
LM_INFO("Found expired tuple [%.*s]: delete and send BYEs\n",
tuple->key->len, tuple->key->s);
if(tuple->bridge_entities[0] && tuple->bridge_entities[1] && !tuple->to_del)
{
if(!tuple->bridge_entities[0]->disconnected)
{
memset(&req_data, 0, sizeof(b2b_req_data_t));
PREP_REQ_DATA(tuple->bridge_entities[0]);
req_data.method =&bye;
b2b_api.send_request(&req_data);
}
if(!tuple->bridge_entities[1]->disconnected)
{
memset(&req_data, 0, sizeof(b2b_req_data_t));
PREP_REQ_DATA(tuple->bridge_entities[1]);
req_data.method =&bye;
b2b_api.send_request(&req_data);
}
}
b2bl_delete(tuple, i, 0);
}
tuple = tuple_next;
}
lock_release(&b2bl_htable[i].lock);
}
}
static int load_scenario(b2b_scenario_t** scenario_list,char* filename)
{
xmlDocPtr doc;
xmlNodePtr node;
b2b_scenario_t* scenario = NULL;
str attr;
xmlNodePtr rules_node, rule_node, request_node;
int request_id = 0;
b2b_rule_t* rule_struct = NULL;
xmlNodePtr body_node;
char* body_content= 0;
char* body_type= 0;
doc = xmlParseFile(filename);
if(doc == NULL)
{
LM_ERR("Failed to parse xml file\n");
return -1;
}
scenario = (b2b_scenario_t*)pkg_malloc(sizeof(b2b_scenario_t));
if(scenario == NULL)
{
LM_ERR("No more private memory\n");
xmlFreeDoc(doc);
return -1;
}
memset(scenario, 0, sizeof(b2b_scenario_t));
/* analyze the scenario document and descompose so that
* applying it will be more efficient */
/* extract scenario_id and param no */
scenario->id.s = (char*)xmlNodeGetAttrContentByName(doc->children, "id");
if(scenario->id.s == NULL)
{
LM_ERR("XML scenario document not well formed. No id attribute found"
" for root node\n");
pkg_free(scenario);
return -1;
}
scenario->id.len = strlen(scenario->id.s);
LM_DBG("Loaded scenario with id = [%.*s]\n", scenario->id.len, scenario->id.s);
attr.s = (char*)xmlNodeGetAttrContentByName(doc->children, "param");
if(attr.s == NULL)
{
LM_ERR("XML scenario document not well formed. No id attribute found"
" for root node\n");
return -1;
}
attr.len = strlen(attr.s);
if( str2int(&attr, &scenario->param_no) < 0)
{
LM_ERR("Failed to parse id attribute for scenario node. It must be an integer.\n");
xmlFree(attr.s);
pkg_free(scenario);
return -1;
}
xmlFree(attr.s);
/* extract init node */
scenario->init_node = xmlDocGetNodeByName(doc, "init", NULL);
if(scenario->init_node == NULL)
{
LM_ERR("Wrong formatted xml doc. Didn't find an init node\n");
goto error;
}
node = xmlNodeGetChildByName(scenario->init_node, "use_init_sdp");
if(node)
{
scenario->use_init_sdp = 1;
body_node = xmlNodeGetChildByName(node, "body");
if(body_node)
{
body_type = (char *)xmlNodeGetAttrContentByName(body_node, "type");
if (body_type == NULL)
{
LM_ERR("Bad formatted scenario document. Empty body content type\n");
goto error;
}
body_content = (char*)xmlNodeGetContent(body_node);
if(body_content == NULL)
{
LM_ERR("Bad formatted scenario document. Empty body\n");
xmlFree(body_type);
goto error;
}
/* we move everything in pkg to be able to strip them */
scenario->body_type.len = strlen(body_type);
scenario->body_type.s = body_type;
scenario->body.len = strlen(body_content);
scenario->body.s = body_content;
}
}
/* go through the rules */
node = xmlDocGetNodeByName(doc, "rules", NULL);
if(node == NULL)
{
LM_DBG("No rules defined\n");
goto done;
}
rules_node = xmlNodeGetChildByName(node, "request");
if(rules_node == NULL)
{
LM_DBG("No request rules defined\n");
goto after_req_rules;
}
for(request_node= rules_node->children; request_node; request_node = request_node->next)
{
if(xmlStrcasecmp(request_node->name, (unsigned char*)"text") == 0)
continue;
attr.s = (char*)request_node->name;
attr.len = strlen(attr.s);
request_id = b2b_get_request_id(&attr);
if(request_id < 0)
{
LM_ERR("Bad scenario document. A rule defined for a not supported"
" request type [%s]\n", request_node->name);
goto error;
}
for(rule_node= request_node->children; rule_node; rule_node = rule_node->next)
{
if(xmlStrcasecmp(rule_node->name, (unsigned char*)"rule")!= 0)
continue;
rule_struct = (b2b_rule_t*)pkg_malloc(sizeof(b2b_rule_t));
if(rule_struct == NULL)
{
LM_ERR("No more memory\n");
goto error;
}
memset(rule_struct, 0, sizeof(b2b_rule_t));
rule_struct->next = scenario->request_rules[request_id];
scenario->request_rules[request_id] = rule_struct;
attr.s = (char*)xmlNodeGetAttrContentByName(rule_node, "id");
if(attr.s == NULL)
{
LM_ERR("Bad scenario document. No id attribute for 'rule' node\n");
goto error;
}
attr.len = strlen(attr.s);
if(str2int(&attr, &rule_struct->id)< 0)
{
LM_ERR("Bad scenario document. rules_no subschild for request rule not an integer\n");
xmlFree(attr.s);
goto error;
}
xmlFree(attr.s);
rule_struct->cond_state = -1;
/* extract conditional state if present */
rule_struct->cond_node = xmlNodeGetChildByName(rule_node, "condition");
if(rule_struct->cond_node)
{
/* extract the condition state if any */
attr.s = (char*)xmlNodeGetNodeContentByName(rule_struct->cond_node, "state", NULL);
if(attr.s)
{
attr.len = strlen(attr.s);
if(str2int(&attr, (unsigned int*)&rule_struct->cond_state)< 0)
{
LM_ERR("Bad scenario. Cond state must be an integer [%s]\n",attr.s);
xmlFree(attr.s);
goto error;
}
xmlFree(attr.s);
}
}
node = xmlNodeGetChildByName(rule_node, "action");
if(node == NULL)
{
LM_ERR("Bad scenario document. A rule needs an action node\n");
goto error;
}
rule_struct->action_node = node;
}
}
after_req_rules:
/* TODO - Analyze if there are actions for replies */
LM_DBG("scenario_id = %.*s\n", scenario->id.len, scenario->id.s);
done:
scenario->doc = doc;
scenario->next = *scenario_list;
*scenario_list = scenario;
return 0;
error:
if(doc)
xmlFree(doc);
if(scenario)
{
int i;
b2b_rule_t* prev;
for(i = 0; i< B2B_METHODS_NO; i++)
{
rule_struct = scenario->request_rules[i];
while(rule_struct)
{
prev = rule_struct;
rule_struct = rule_struct->next;
pkg_free(prev);
}
}
rule_struct = scenario->reply_rules;
while(rule_struct)
{
prev = rule_struct;
rule_struct = rule_struct->next;
pkg_free(prev);
}
if(scenario->id.s)
xmlFree(scenario->id.s);
if(scenario->body.s)
xmlFree(scenario->body.s);
if(scenario->body_type.s)
xmlFree(scenario->body_type.s);
pkg_free(scenario);
}
return -1;
}
static int load_script_scenario(modparam_t type, void* val)
{
return load_scenario(&script_scenarios, (char*)val);
}
static int load_extern_scenario(modparam_t type, void* val)
{
return load_scenario(&extern_scenarios, (char*)val);
}
static void mod_destroy(void)
{
int i;
b2b_rule_t* rule_struct = NULL;
b2b_scenario_t* scenario, *next;
if(b2bl_db)
{
if(b2bl_db_mode==WRITE_BACK)
b2b_logic_dump(1);
b2bl_dbf.close(b2bl_db);
}
scenario = extern_scenarios;
while(scenario)
{
next = scenario->next;
xmlFree(scenario->id.s);
xmlFreeDoc(scenario->doc);
pkg_free(scenario);
scenario = next;
}
scenario = script_scenarios;
while(scenario)
{
next = scenario->next;
xmlFreeDoc(scenario->doc);
b2b_rule_t* prev;
for(i = 0; i< B2B_METHODS_NO; i++)
{
rule_struct = scenario->request_rules[i];
while(rule_struct)
{
prev = rule_struct;
rule_struct = rule_struct->next;
pkg_free(prev);
}
}
rule_struct = scenario->reply_rules;
while(rule_struct)
{
prev = rule_struct;
rule_struct = rule_struct->next;
pkg_free(prev);
}
if(scenario->id.s)
xmlFree(scenario->id.s);
if (scenario->body.s)
xmlFree(scenario->body.s);
if (scenario->body_type.s)
xmlFree(scenario->body_type.s);
pkg_free(scenario);
scenario = next;
}
destroy_b2bl_htable();
}
static int child_init(int rank)
{
if (b2bl_db_mode==0)
return 0;
if (b2bl_dbf.init==0)
{
LM_CRIT("child_init: database not bound\n");
return -1;
}
b2bl_db = b2bl_dbf.init(&db_url);
if(!b2bl_db)
{
LM_ERR("connecting to database failed\n");
return -1;
}
LM_DBG("child %d: Database connection opened successfully\n", rank);
return 0;
}
b2b_scenario_t* get_scenario_id_list(str* sid, b2b_scenario_t* list)
{
b2b_scenario_t* scenario;
/*search first in script_scenarios */
scenario = list;
while(scenario)
{
LM_DBG("scenario id = %.*s\n", scenario->id.len, scenario->id.s);
if(scenario->id.len == sid->len &&
strncmp(scenario->id.s, sid->s, sid->len) == 0)
{
return scenario;
}
scenario = scenario->next;
}
return 0;
}
b2b_scenario_t* get_scenario_id(str* sid)
{
b2b_scenario_t* scenario;
if(sid->s== 0 || sid->len== 0)
return 0;
if(sid->len == B2B_TOP_HIDING_SCENARY_LEN &&
strncmp(sid->s,B2B_TOP_HIDING_SCENARY,B2B_TOP_HIDING_SCENARY_LEN)==0)
{
return 0;
}
scenario = get_scenario_id_list(sid, script_scenarios);
if(scenario)
return scenario;
return get_scenario_id_list(sid, extern_scenarios);
}
static int fixup_b2b_logic(void** param, int param_no)
{
pv_elem_t *model;
str s;
str flags_s;
int st;
struct b2b_scen_fl *scf;
if(param_no== 0)
return 0;
if(*param)
{
s.s = (char*)(*param);
s.len = strlen(s.s);
if(pv_parse_format(&s, &model)<0)
{
LM_ERR( "wrong format[%s]\n",(char*)(*param));
return E_UNSPEC;
}
/* the first parameter must be the scenario id and possible flags, must be a string */
if(param_no == 1)
{
if(model->spec.type != PVT_NONE )
{
LM_ERR("The first parameter is not a string\n");
return -1;
}
scf = prepare_b2b_scen_fl_struct();
if (scf == NULL)
{
LM_ERR("no more pkg memory\n");
return -1;
}
scf->params.init_timeout = b2bl_th_init_timeout;
if ( (flags_s.s = strchr(s.s,'/')) != NULL)
{
s.len = flags_s.s - s.s;
flags_s.s++;
flags_s.len = strlen(flags_s.s);
/* parse flags */
for( st=0 ; st< flags_s.len ; st++ ) {
switch (flags_s.s[st])
{
case 't':
scf->params.init_timeout = 0;
while (st<flags_s.len-1 && isdigit(flags_s.s[st+1])) {
scf->params.init_timeout =
scf->params.init_timeout*10 + flags_s.s[st+1] - '0';
st++;
}
break;
case 'a':
scf->params.flags |= B2BL_FLAG_TRANSPARENT_AUTH;
break;
case 'p':
scf->params.flags |= B2BL_FLAG_TRANSPARENT_TO;
break;
default:
LM_WARN("unknown option `%c'\n", *flags_s.s);
}
}
}
if(s.len == B2B_TOP_HIDING_SCENARY_LEN &&
strncmp(s.s,B2B_TOP_HIDING_SCENARY,B2B_TOP_HIDING_SCENARY_LEN)==0)
{
scf->scenario = NULL;
}
else
{
scf->scenario = get_scenario_id_list(&s, script_scenarios);
if (!scf->scenario)
{
LM_ERR("Wrong Scenary ID. No scenario with this ID [%.*s]\n", s.len, s.s);
return E_UNSPEC;
}
}
*param=(void*)scf;
return 0;
}
*param = (void*)model;
return 0;
}
LM_ERR( "null format\n");
return E_UNSPEC;
}
struct to_body* get_b2bl_from(struct sip_msg* msg)
{
int len = 0;
if(b2bl_from_spec_param.s)
{
memset(&b2bl_from_tok, 0, sizeof(pv_value_t));
if(pv_get_spec_value(msg, &b2bl_from_spec, &b2bl_from_tok) < 0)
{
LM_ERR("Failed to get b2bl_from value\n");
return NULL;
}
//LM_DBG("got b2bl_from_spec_param flags [%d]\n", b2bl_from_tok.flags);
if(b2bl_from_tok.flags&PV_VAL_INT)
{
/* the PV might be empty */
return NULL;
}
if(b2bl_from_tok.flags&PV_VAL_STR)
{
//LM_DBG("got PV_SPEC b2bl_from [%.*s]\n",
// b2bl_from_tok.rs.len, b2bl_from_tok.rs.s);
if(b2bl_from_tok.rs.len+CRLF_LEN > B2BL_FROM_BUF_LEN) {
LM_ERR("Buffer overflow\n");
return NULL;
}
trim(&b2bl_from_tok.rs);
memcpy(b2bl_from_buf, b2bl_from_tok.rs.s,
b2bl_from_tok.rs.len);
len = b2bl_from_tok.rs.len;
if(strncmp(b2bl_from_tok.rs.s + len - CRLF_LEN, CRLF, CRLF_LEN)) {
memcpy(b2bl_from_buf + len, CRLF, CRLF_LEN);
len+= CRLF_LEN;
}