Source

opensips-clone / mod_fix.c

Full commit
  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
/*
 *$Id: mod_fix.h 2845 2007-10-04 11:21:22Z miconda $
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*!
 * \file
 * \brief Generic fixup functions for module function parameter.
 * - \ref FixupNameFormat
 */

#include <stdio.h>
#include <stdlib.h>
#include <regex.h>

#include "mem/mem.h"
#include "str.h"
#include "ut.h"
#include "error.h"
#include "pvar.h"
#include "mod_fix.h"

/*!
 * \page FixupNameFormat Fixup Naming format
 * NAMING FORMAT
 * === fixup functions ===
 * + fixup_type1_type2(...)
 * - type1 - is the type the fist parameter gets converted to
 * - type2 - is the type the second parameter gets converted to
 * + if the parameter is missing, then use 'null'
 * + if the parameter is not converted, then use 'none'
 *
 * === fixup free functions ===
 * + free_fixup_type1_type2(...)
 * - type1 and type2 are same as for fixup function
 *
 * === helper functions ===
 * + functions to be used internaly for fixup/free functions
 * + fixup_type(...)
 * + fixup_free_type(...)
 * - type - is the type of the parameter that gets converted to/freed
 */


/*! \brief
 * helper function
 * Convert char* parameter to str* parameter
 */
int fixup_str(void** param)
{
	str* s;
	
	s = (str*)pkg_malloc(sizeof(str));
	if (!s) {
		LM_ERR("no more pkg memory\n");
		return E_UNSPEC;
	}
		
	s->s = (char*)*param;
	s->len = strlen(s->s);
	*param = (void*)s;
	
	return 0;
}

/*! \brief
 * - helper function
 * free the str* parameter
 */
int fixup_free_str(void** param)
{
	if(*param) {
		pkg_free(*param);
		*param = 0;
	}
	return 0;
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to str*
 */
int fixup_str_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_str(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to str*
 * - second parameter is converted to str*
 */
int fixup_str_str(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_str(param);
}

/*! \brief
 * fixup free for functions that get one parameter
 * - first parameter was converted to str*
 */
int fixup_free_str_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_free_str(param);
}

/*! \brief
 * fixup free for functions that get two parameters
 * - first parameter was converted to str*
 * - second parameter was converted to str*
 */
int fixup_free_str_str(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_free_str(param);
}

/*! \brief
 * - helper function
 * Convert char* parameter to unsigned int
 * - the input parameter must be pkg-allocated and will be freed by function
 *   (it is how it comes from the config parser)
 */
int fixup_uint(void** param)
{
	unsigned int ui;
	str s;

	s.s = (char*)*param;
	s.len = strlen(s.s);
	if(str2int(&s, &ui)==0)
	{
		pkg_free(*param);
		*param=(void *)(unsigned long)ui;
		return 0;
	}
	LM_ERR("bad number <%s>\n", (char *)(*param));
	return E_CFG;
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to unsigned int
 */
int fixup_uint_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_uint(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to unsigned int
 * - second parameter is converted to unsigned int
 */
int fixup_uint_uint(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_uint(param);
}

#if 0
/*! \brief
 * - helper function
 * Convert char* parameter to signed int
 * - the input parameter must be pkg-allocated and will be freed by function
 *   (it is how it comes from the config parser)
 */
int fixup_sint( void** param)
{
	int si;
	str s;

	s.s = (char*)*param;
	s.len = strlen(s.s);
	if(str2sint(&s, &si)==0)
	{
		pkg_free(*param);
		*param=(void *)si;
		return 0;
	}
	LM_ERR("bad number <%s>\n", (char *)(*param));
	return E_CFG;
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to signed int
 */
int fixup_sint_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_sint(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to signed int
 * - second parameter is converted to signed int
 */
int fixup_sint_sint(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_sint(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to signed int
 * - second parameter is converted to unsigned int
 */
int fixup_sint_uint(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	if (param_no == 1)
		return fixup_sint(param);
	return fixup_uint(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to unsigned int
 * - second parameter is converted to signed int
 */
int fixup_uint_sint(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	if (param_no == 1)
		return fixup_uint(param);
	return fixup_sint(param);
}
#endif

/*! \brief
 * - helper function: Convert char* parameter to regular expression structure
 * - the input parameter must be pkg-allocated and will be freed by function
 *   (it is how it comes from the config parser)
 */
static int fixup_regexp(void** param, int rflags)
{
	regex_t* re;

	if ((re=pkg_malloc(sizeof(regex_t)))==0) {
		LM_ERR("no more pkg memory\n");
		return E_OUT_OF_MEM;
	}
	if (regcomp(re, *param, (REG_EXTENDED|REG_ICASE|REG_NEWLINE)&(~rflags))) {
		pkg_free(re);
		LM_ERR("bad re %s\n", (char*)*param);
		return E_BAD_RE;
	}
	/* free string */
	pkg_free(*param);
	/* replace it with the compiled re */
	*param=re;
	return 0;
}

/*! \brief
 * - helper function: free the regular expression parameter
 */
int fixup_free_regexp(void** param)
{
	if(*param)
	{
		regfree((regex_t*)(*param));
		pkg_free(*param);
		*param = 0;
	}
	return 0;
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to regular expression structure
 */
int fixup_regexp_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_regexp(param, 0);
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to regular expression structure
 *   where "match-any-character" operators also match a newline
 */
int fixup_regexpNL_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_regexp(param, REG_NEWLINE);
}

/**
 * fixup free for functions that get one parameter
 * - first parameter was converted to regular expression
 */
int fixup_free_regexp_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_free_regexp(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to regular expression structure
 * - second parameter is not converted
 */
int fixup_regexp_none(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	if (param_no == 1)
		return fixup_regexp(param, 0);
	return 0;
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to regular expression structure
 *   where "match-any-character" operators also match a newline
 * - second parameter is not converted
 */
int fixup_regexpNL_none(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	if (param_no == 1)
		return fixup_regexp(param, REG_NEWLINE);
	return 0;
}

/**
 * fixup free for functions that get two parameters
 * - first parameter was converted to regular expression
 * - second parameter was notconverted
 */
int fixup_free_regexp_none(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	if (param_no == 1)
		return fixup_free_regexp(param);
	return 0;
}


/*! \brief
 * - helper function: Convert char* parameter to PV spec structure
 */
int fixup_pvar(void **param)
{
	pv_spec_t *sp;
	str s;

	sp = (pv_spec_t*)pkg_malloc(sizeof(pv_spec_t));
	if (sp == 0) {
		LM_ERR("no pkg memory left\n");
		return E_UNSPEC;
	}
	s.s = (char*)*param; s.len = strlen(s.s);
	if (pv_parse_spec(&s, sp) == 0) {
		LM_ERR("parsing of pseudo variable %s failed!\n", (char*)*param);
		pkg_free(sp);
		return E_UNSPEC;
	}
	if (sp->type == PVT_NULL) {
		LM_ERR("bad pseudo variable\n");
		pkg_free(sp);
		return E_UNSPEC;
	}
	*param = (void*)sp;

	return 0;
}

/*! \brief
 * - helper function: free the PV parameter
 */
int fixup_free_pvar(void** param)
{
    if (*param) {
		pv_spec_free((pv_spec_t*)*param);
    }

    return 0;
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to PV spec
 */
int fixup_pvar_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_pvar(param);
}

/*! \brief
 * fixup free for functions that get one parameter
 * - first parameter was converted to PV spec
 */
int fixup_free_pvar_null(void** param, int param_no)
{
	if(param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_free_pvar(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - both parameters are converted to PV spec
 */
int fixup_pvar_pvar(void** param, int param_no)
{
	if (param_no == 1)
	{
	    return fixup_pvar(param);
	}
	if (param_no != 2)
	{
	    LM_ERR("invalid parameter number %d\n", param_no);
	    return E_UNSPEC;
	}
	return fixup_pvar(param);
}

/*! \brief
 * fixup free for functions that get two parameters
 * - both parameters were converted to PV spec
 */
int fixup_free_pvar_pvar(void** param, int param_no)
{
	if(param_no == 1)
	{
	    return fixup_free_pvar(param);
	}
	if (param_no != 2)
	{
	    LM_ERR("invalid parameter number %d\n", param_no);
	    return E_UNSPEC;
	}	
	return fixup_free_pvar(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to PV spec
 * - second parameter is converted to str*
 */
int fixup_pvar_str(void** param, int param_no)
{
	if (param_no == 1)
	{
	    return fixup_pvar(param);
	}
	if (param_no != 2)
	{
	    LM_ERR("invalid parameter number %d\n", param_no);
	    return E_UNSPEC;
	}
	return fixup_str(param);
}

/*! \brief
 * fixup free for functions that get two parameters
 * - first parameter was converted to PV spec
 * - second parameter was converted to str*
 */
int fixup_free_pvar_str(void** param, int param_no)
{
	if(param_no == 1)
	{
	    return fixup_free_pvar(param);
	}
	if (param_no != 2)
	{
	    LM_ERR("invalid parameter number %d\n", param_no);
	    return E_UNSPEC;
	}
	return fixup_free_str(param);
}

/*! \brief
 * fixup for functions that get three parameters
 * - first parameter is converted to PV spec
 * - second parameter is converted to str*
 * - third parameter is converted to str*
 */
int fixup_pvar_str_str(void** param, int param_no)
{
	if (param_no == 1)
	{
	    return fixup_pvar(param);
	}
	if (param_no != 2 && param_no != 3)
	{
	    LM_ERR("invalid parameter number %d\n", param_no);
	    return E_UNSPEC;
	}
	return fixup_str(param);
}

/*! \brief
 * fixup free for functions that get three parameters
 * - first parameter was converted to PV spec
 * - second parameter was converted to str*
 * - third parameter was converted to str*
 */
int fixup_free_pvar_str_str(void** param, int param_no)
{
	if(param_no == 1)
	{
	    return fixup_free_pvar(param);
	}
	if (param_no != 2 && param_no != 3)
	{
	    LM_ERR("invalid parameter number %d\n", param_no);
	    return E_UNSPEC;
	}
	return fixup_free_str(param);
}

/*! \brief
 * - helper function
 * Convert char* parameter to gparam_t (int or PV)
 */
int fixup_igp(void** param)
{
	str s;
	gparam_p gp = NULL;
	
	gp = (gparam_p)pkg_malloc(sizeof(gparam_t));
	if(gp == NULL)
	{
		LM_ERR("no more memory\n");
		return E_UNSPEC;
	}
	memset(gp, 0, sizeof(gparam_t));
	s.s = (char*)*param; s.len = strlen(s.s);
	if(s.s[0]==PV_MARKER)
	{
		gp->type = GPARAM_TYPE_PVS;
		gp->v.pvs = (pv_spec_t*)pkg_malloc(sizeof(pv_spec_t));
		if (gp->v.pvs == NULL)
		{
			LM_ERR("no pkg memory left for pv_spec_t\n");
		    pkg_free(gp);
		    return E_UNSPEC;
		}

		if(pv_parse_spec(&s, gp->v.pvs)==NULL)
		{
			LM_ERR("Unsupported User Field identifier\n");
		    pkg_free(gp->v.pvs);
		    pkg_free(gp);
			return E_UNSPEC;
		}
	} else {
		gp->type = GPARAM_TYPE_INT;
		if(str2sint(&s, &gp->v.ival) != 0)
		{
			LM_ERR("Bad number <%s>\n", (char*)(*param));
			return E_UNSPEC;
		}
	}
	*param = (void*)gp;

	return 0;
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to gparam_t (int or PV)
 */
int fixup_igp_null(void** param, int param_no)
{
	if (param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_igp(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to gparam_t (int or PV)
 * - second parameter is converted to gparam_t (int or PV)
 */
int fixup_igp_igp(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_igp(param);
}

/*! \brief
 * fixup for functions that get three parameters
 * - first parameter is converted to gparam_t (int or PV)
 * - second parameter is converted to PV spec
 * - third parameter is converted to PV spec
 */
int fixup_igp_pvar_pvar(void** param, int param_no)
{
    if(param_no == 1) {
	return fixup_igp(param);
    }
    if (param_no != 2 && param_no != 3)	{
	LM_ERR("invalid parameter number %d\n", param_no);
	return E_UNSPEC;
    }
    return fixup_pvar(param);
}

/*! \brief
 * fixup free for functions that get three parameters
 * - first parameter was converted to gparam_t (int or PV)
 * - second parameter was converted to PV spec
 * - third parameter was converted to PV spec
 */
int fixup_free_igp_pvar_pvar(void** param, int param_no)
{
	if(param_no == 1) {
	    return 0;
	}
	if (param_no != 2 && param_no != 3) {
	    LM_ERR("invalid parameter number %d\n", param_no);
	    return E_UNSPEC;
	}
	return fixup_free_pvar(param);
}

/*! \brief
 * - helper function
 * Return integer value from a gparam_t
 */
int fixup_get_ivalue(struct sip_msg* msg, gparam_p gp, int *val)
{
	pv_value_t value;

	if(gp->type==GPARAM_TYPE_INT)
	{
		*val = gp->v.ival;
		return 0;
	}
	
	if(pv_get_spec_value(msg, gp->v.pvs, &value)!=0 
			|| value.flags&PV_VAL_NULL || !(value.flags&PV_VAL_INT))
	{
		LM_ERR("no valid PV value found (error in scripts)\n");
		return -1;
	}
	*val = value.ri;
	return 0;
}

/*! \brief
 * - helper function
 * Convert char* parameter to gparam_t (str or pv_elem_t)
 */
int fixup_spve(void** param)
{
	str s;
	gparam_p gp = NULL;
	
	gp = (gparam_p)pkg_malloc(sizeof(gparam_t));
	if(gp == NULL)
	{
		LM_ERR("no more memory\n");
		return E_UNSPEC;
	}
	memset(gp, 0, sizeof(gparam_t));

	s.s = (char*)(*param); s.len = strlen(s.s);
	if(pv_parse_format(&s, &gp->v.pve)<0)
	{
		LM_ERR("wrong format[%s]\n", s.s);
		return E_UNSPEC;
	}
	if(gp->v.pve->spec.getf==NULL)
	{
		gp->type = GPARAM_TYPE_STR;
		pv_elem_free_all(gp->v.pve);
		gp->v.sval = s;
	} else {
		gp->type = GPARAM_TYPE_PVE;
	}			
	*param = (void*)gp;
	return 0;
}

/*! \brief
 * fixup for functions that get one parameter
 * - first parameter is converted to gparam_t (str or pv_elem_t)
 */
int fixup_spve_null(void** param, int param_no)
{
	if (param_no != 1)
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_spve(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to gparam_t (str or pv_elem_t)
 * - second parameter is converted to gparam_t (str or pv_elem_t)
 */
int fixup_spve_spve(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	return fixup_spve(param);
}

/*! \brief
 * fixup for functions that get two parameters
 * - first parameter is converted to gparam_t (str or pv_elem_t)
 * - second parameter is converted to uint
 */
int fixup_spve_uint(void** param, int param_no)
{
	if (param_no != 1 && param_no != 2 )
	{
		LM_ERR("invalid parameter number %d\n", param_no);
		return E_UNSPEC;
	}
	if (param_no == 1)
		return fixup_spve(param);
		
	return fixup_uint(param);
}

/*! \brief
 * - helper function
 * Return string value from a gparam_t
 */
int fixup_get_svalue(struct sip_msg* msg, gparam_p gp, str *val)
{
	pv_value_t value;

	if(gp->type==GPARAM_TYPE_STR)
	{
		*val = gp->v.sval;
		return 0;
	}
	
	if(gp->type==GPARAM_TYPE_PVS)
	{
		if(pv_get_spec_value(msg, gp->v.pvs, &value)!=0 
				|| value.flags&PV_VAL_NULL || !(value.flags&PV_VAL_STR))
		{
			LM_ERR("no valid PV value found (error in scripts)\n");
			return -1;
		}
		*val = value.rs;
		return 0;
	}

	if(gp->type==GPARAM_TYPE_PVE)
	{
		if(pv_printf_s( msg, gp->v.pve, val)!=0)
		{
			LM_ERR("cannot print the PV-formated string\n");
			return -1;
		}
		return 0;
	}

	return -1;
}