pvapi.c
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 /*
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  * $Id$
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  *
  * Copyright (C) 2001-2003 FhG Fokus
  *
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  * This file is part of SIP-Router, a free SIP server.
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  *
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  * SIP-Router is free software; you can redistribute it and/or modify
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  * 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
  *
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  * SIP-Router is distributed in the hope that it will be useful,
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  * 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
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  * \brief SIP-router core ::  PV API specification
  * \ingroup core
  * Module: \ref core
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  */
 
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 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include "mem/mem.h"
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 #include "mem/shm_mem.h"
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 #include "ut.h"
 #include "dprint.h"
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 #include "hashes.h"
858146a9
 #include "route.h"
8c3a7158
 #include "pvapi_init.h"
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 #include "pvar.h"
 
 #define is_in_str(p, in) (p<in->s+in->len && *p)
 
 #define PV_TABLE_SIZE	16
037dd9e5
 #define TR_TABLE_SIZE	4
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 void tr_destroy(trans_t *t);
 void tr_free(trans_t *t);
 
 typedef struct _pv_item
 {
 	pv_export_t pve;
 	unsigned int pvid;
 	struct _pv_item *next;
 } pv_item_t, *pv_item_p;
 
 static pv_item_t* _pv_table[PV_TABLE_SIZE];
 static int _pv_table_set = 0;
 
 
 /**
  *
  */
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 void pv_init_table(void)
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 {
 	memset(_pv_table, 0, sizeof(pv_item_t*)*PV_TABLE_SIZE);
 	_pv_table_set = 1;
 }
 
 /**
  *
  */
 static int is_pv_valid_char(char c)
 {
 	if((c>='0' && c<='9') || (c>='a' && c<='z') || (c>='A' && c<='Z')
0c73dfed
 			|| (c=='_') || (c=='.') || (c=='?') /* ser $? */)
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 		return 1;
 	return 0;
 }
 
 /**
  *
  */
 int pv_table_add(pv_export_t *e)
 {
 	char *p;
 	str  *in;
 	pv_item_t *pvi = NULL;
 	pv_item_t *pvj = NULL;
 	pv_item_t *pvn = NULL;
 	int found;
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 	unsigned int pvid;
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 	if(e==NULL || e->name.s==NULL || e->getf==NULL || e->type==PVT_NONE)
 	{
 		LM_ERR("invalid parameters\n");
 		return -1;
 	}
 	
 	if(_pv_table_set==0)
 	{
 		LM_DBG("PV table not initialized, doing it now\n");
 		pv_init_table();
 	}
 	in = &(e->name);
 	p = in->s;	
 	while(is_in_str(p,in) && is_pv_valid_char(*p))
 		p++;
 	if(is_in_str(p,in))
 	{
 		LM_ERR("invalid char [%c] in [%.*s]\n", *p, in->len, in->s);
 		return -1;
 	}
 	found = 0;
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 	//pvid = get_hash1_raw(in->s, in->len);
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 	pvid = get_hash1_raw(in->s, in->len);
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 	pvi = _pv_table[pvid%PV_TABLE_SIZE];
 	while(pvi)
 	{
 		if(pvi->pvid > pvid)
 			break;
 		if(pvi->pve.name.len==in->len)
 		{
 			found = strncmp(pvi->pve.name.s, in->s, in->len);
41c098d0
 
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 			if(found==0)
 			{
 				LM_ERR("pvar [%.*s] already exists\n", in->len, in->s);
 				return -1;
 			}
 		}
 		pvj = pvi;
 		pvi = pvi->next;
 	}
 
 	pvn = (pv_item_t*)pkg_malloc(sizeof(pv_item_t));
 	if(pvn==0)
 	{
 		LM_ERR("no more memory\n");
 		return -1;
 	}
 	memset(pvn, 0, sizeof(pv_item_t));
 	memcpy(&(pvn->pve), e, sizeof(pv_export_t));
 	pvn->pvid = pvid;
 
 	if(pvj==0)
 	{
 		pvn->next = _pv_table[pvid%PV_TABLE_SIZE];
 		_pv_table[pvid%PV_TABLE_SIZE] = pvn;
 		goto done;
 	}
 	pvn->next = pvj->next;
 	pvj->next = pvn;
 
 done:
 	return 0;
 }
 
 /**
  *
  */
 int register_pvars_mod(char *mod_name, pv_export_t *items)
 {
 	int ret;
 	int i;
 
 	if (items==0)
 		return 0;
 
 	for ( i=0 ; items[i].name.s ; i++ ) {
 		ret = pv_table_add(&items[i]);
 		if (ret!=0) {
 			LM_ERR("failed to register pseudo-variable <%.*s> for module %s\n",
 					items[i].name.len, items[i].name.s, mod_name);
 		}
 	}
 	return 0;
 }
 
 /**
  *
  */
 int pv_table_free(void)
 {
 	pv_item_p xe;
 	pv_item_p xe1;
 	int i;
 
 	for(i=0; i<PV_TABLE_SIZE; i++)
 	{
 		xe = _pv_table[i];
 		while(xe!=0)
 		{
 			xe1 = xe;
 			xe = xe->next;
 			pkg_free(xe1);
 		}
 	}
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 	memset(_pv_table, 0, sizeof(pv_item_t*)*PV_TABLE_SIZE);
 	_pv_table_set = 0;
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 	return 0;
 }
 
 /********** helper functions ********/
 /**
  * convert unsigned int to pv_value_t
  */
 int pv_get_uintval(struct sip_msg *msg, pv_param_t *param,
 		pv_value_t *res, unsigned int uival)
 {
 	int l = 0;
 	char *ch = NULL;
 
 	if(res==NULL)
 		return -1;
 
 	ch = int2str(uival, &l);
 	res->rs.s = ch;
 	res->rs.len = l;
 
 	res->ri = (int)uival;
 	res->flags = PV_VAL_STR|PV_VAL_INT|PV_TYPE_INT;
 	return 0;
 }
 
 /**
  * convert signed int to pv_value_t
  */
 int pv_get_sintval(struct sip_msg *msg, pv_param_t *param,
 		pv_value_t *res, int sival)
 {
 	int l = 0;
 	char *ch = NULL;
 
 	if(res==NULL)
 		return -1;
 
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 	ch = sint2str(sival, &l);
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 	res->rs.s = ch;
 	res->rs.len = l;
 
 	res->ri = sival;
 	res->flags = PV_VAL_STR|PV_VAL_INT|PV_TYPE_INT;
 	return 0;
 }
 
 /**
  * convert str to pv_value_t
  */
 int pv_get_strval(struct sip_msg *msg, pv_param_t *param,
 		pv_value_t *res, str *sval)
 {
 	if(res==NULL)
 		return -1;
 
 	res->rs = *sval;
 	res->flags = PV_VAL_STR;
 	return 0;
 }
 
 /**
  * convert str-int to pv_value_t (type is str)
  */
 int pv_get_strintval(struct sip_msg *msg, pv_param_t *param,
 		pv_value_t *res, str *sval, int ival)
 {
 	if(res==NULL)
 		return -1;
 
 	res->rs = *sval;
 	res->ri = ival;
 	res->flags = PV_VAL_STR|PV_VAL_INT;
 	return 0;
 }
 
 /**
  * convert int-str to pv_value_t (type is int)
  */
 int pv_get_intstrval(struct sip_msg *msg, pv_param_t *param,
 		pv_value_t *res, int ival, str *sval)
 {
 	if(res==NULL)
 		return -1;
 
 	res->rs = *sval;
 	res->ri = ival;
 	res->flags = PV_VAL_STR|PV_VAL_INT|PV_TYPE_INT;
 	return 0;
 }
 
 /*** ============================= ***/
 static str pv_str_marker = { PV_MARKER_STR, 1 };
 static int pv_get_marker(struct sip_msg *msg, pv_param_t *param,
 		pv_value_t *res)
 {
3247010c
 	return pv_get_strintval(msg, param, res, &pv_str_marker,
 			(int)pv_str_marker.s[0]);
 }
 
 static str pv_str_empty  = { "", 0 };
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 static str pv_str_null   = { "<null>", 6 };
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 int pv_get_null(struct sip_msg *msg, pv_param_t *param, pv_value_t *res)
 {
 	if(res==NULL)
 		return -1;
 	
 	res->rs = pv_str_empty;
 	res->ri = 0;
 	res->flags = PV_VAL_NULL;
 	return 0;
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 }
 
 pv_export_t* pv_lookup_spec_name(str *pvname, pv_spec_p e)
 {
 	pv_item_t *pvi;
 	unsigned int pvid;
 
 	if(pvname==0 || e==0)
 	{
 		LM_ERR("bad parameters\n");
 		return NULL;
 	}
 
 	/* search in PV table */
037dd9e5
 	// pvid = get_hash1_raw(pvname->s, pvname->len);
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 	pvid = get_hash1_raw(pvname->s, pvname->len);
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 	pvi = _pv_table[pvid%PV_TABLE_SIZE];
 	while(pvi)
 	{
 		if(pvi->pvid > pvid)
 			break;
 
 		if(pvi->pvid==pvid && pvi->pve.name.len==pvname->len
 			&& memcmp(pvi->pve.name.s, pvname->s, pvname->len)==0)
 		{
 			/*LM_DBG("found [%.*s] [%d]\n", pvname->len, pvname->s,
 					_pv_names_table[i].type);*/
 			/* copy data from table to spec */
 			e->type = pvi->pve.type;
 			e->getf = pvi->pve.getf;
 			e->setf = pvi->pve.setf;
 			return &(pvi->pve);
 		}
 		pvi = pvi->next;
 	}
 
 	return NULL;
 }
 
037dd9e5
 int pv_parse_index(pv_spec_p sp, str *in)
 {
 	char *p;
 	char *s;
 	int sign;
 	pv_spec_p nsp = 0;
 
 	if(in==NULL || in->s==NULL || sp==NULL)
 		return -1;
 	p = in->s;
 	if(*p==PV_MARKER)
 	{
 		nsp = (pv_spec_p)pkg_malloc(sizeof(pv_spec_t));
 		if(nsp==NULL)
 		{
 			LM_ERR("no more memory\n");
 			return -1;
 		}
 		s = pv_parse_spec(in, nsp);
 		if(s==NULL)
 		{
 			LM_ERR("invalid index [%.*s]\n", in->len, in->s);
 			pv_spec_free(nsp);
 			return -1;
 		}
 		sp->pvp.pvi.type = PV_IDX_PVAR;
 		sp->pvp.pvi.u.dval = (void*)nsp;
 		return 0;
 	}
 	if(*p=='*' && in->len==1)
 	{
 		sp->pvp.pvi.type = PV_IDX_ALL;
 		return 0;
 	}
 	sign = 1;
 	if(*p=='-')
 	{
 		sign = -1;
 		p++;
 	}
 	sp->pvp.pvi.u.ival = 0;
 	while(p<in->s+in->len && *p>='0' && *p<='9')
 	{
 		sp->pvp.pvi.u.ival = sp->pvp.pvi.u.ival * 10 + *p - '0';
 		p++;
 	}
 	if(p!=in->s+in->len)
 	{
 		LM_ERR("invalid index [%.*s]\n", in->len, in->s);
 		return -1;
 	}
 	sp->pvp.pvi.u.ival *= sign;
 	sp->pvp.pvi.type = PV_IDX_INT;
 	return 0;
 }
 
 int pv_init_iname(pv_spec_p sp, int param)
 {
 	if(sp==NULL)
 		return -1;
 	sp->pvp.pvn.type = PV_NAME_INTSTR;
 	sp->pvp.pvn.u.isname.name.n = param;
 	return 0;
 }
 
15ec6f3c
 char* pv_parse_spec2(str *in, pv_spec_p e, int silent)
d74b7829
 {
 	char *p;
 	str s;
 	str pvname;
 	int pvstate;
 	trans_t *tr = NULL;
 	pv_export_t *pte = NULL;
 	int n=0;
 
 	if(in==NULL || in->s==NULL || e==NULL || *in->s!=PV_MARKER)
 	{
15ec6f3c
 		if (!silent) LM_ERR("bad parameters\n");
d74b7829
 		return NULL;
 	}
 	
 	/* LM_DBG("***** input [%.*s] (%d)\n", in->len, in->s, in->len); */
 	tr = 0;
 	pvstate = 0;
 	memset(e, 0, sizeof(pv_spec_t));
 	p = in->s;
 	p++;
 	if(*p==PV_LNBRACKET)
 	{
 		p++;
 		pvstate = 1;
 	}
 	pvname.s = p;
 	if(*p == PV_MARKER) {
 		p++;
 		if(pvstate==1)
 		{
 			if(*p!=PV_RNBRACKET)
 				goto error;
 			p++;
 		}
 		e->getf = pv_get_marker;
 		e->type = PVT_MARKER;
 		pvname.len = 1;
 		goto done_all;
 	}
 	while(is_in_str(p,in) && is_pv_valid_char(*p))
 		p++;
 	pvname.len = p - pvname.s;
 	if(pvstate==1)
 	{
 		if(*p==PV_RNBRACKET)
 		{ /* full pv name ended here*/
 			goto done_inm;
 		} else if(*p==PV_LNBRACKET) {
 			p++;
 			pvstate = 2;
 		} else if(*p==PV_LIBRACKET) {
 			p++;
 			pvstate = 3;
 		} else if(*p==TR_LBRACKET) {
 			p++;
 			pvstate = 4;
 		} else {
15ec6f3c
 			if (!silent)
 				LM_ERR("invalid char '%c' in [%.*s] (%d)\n",
 							*p, in->len, in->s, pvstate);
d74b7829
 			goto error;
 		}
 	} else { 
 		if(!is_in_str(p, in)) {
 			p--;
 			goto done_inm;
 		} else if(*p==PV_LNBRACKET) {
 			p++;
 			pvstate = 5;
 		} else {
 			/* still in input str, but end of PV */
 			/* p is increased at the end, so decrement here */
 			p--;
 			goto done_inm;
 		}
 	}
 
 done_inm:
 	if((pte = pv_lookup_spec_name(&pvname, e))==NULL)
 	{
15ec6f3c
 		if (!silent) 
 			LM_ERR("error searching pvar \"%.*s\"\n", pvname.len, pvname.s);
d74b7829
 		goto error;
 	}
 	if(pte->parse_name!=NULL && pvstate!=2 && pvstate!=5)
 	{
15ec6f3c
 		if (!silent) 
 			LM_ERR("pvar \"%.*s\" expects an inner name\n",
 						pvname.len, pvname.s);
d74b7829
 		goto error;
 	}
 	if(pvstate==2 || pvstate==5)
 	{
 		if(pte->parse_name==NULL)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("pvar \"%.*s\" does not get name param\n",
 						pvname.len, pvname.s);
d74b7829
 			goto error;
 		}
 		s.s = p;
 		n = 0;
 		while(is_in_str(p, in))
 		{
 			if(*p==PV_RNBRACKET)
 			{
 				if(n==0)
 					break;
 				n--;
 			}
 			if(*p == PV_LNBRACKET)
 				n++;
 			p++;
 		}
 
 		if(!is_in_str(p, in))
 			goto error;
 
 		if(p==s.s)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("pvar \"%.*s\" does not get empty name param\n",
 						pvname.len, pvname.s);
d74b7829
 			goto error;
 		}
 		s.len = p - s.s;
 		if(pte->parse_name(e, &s)!=0)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("pvar \"%.*s\" has an invalid name param [%.*s]\n",
 						pvname.len, pvname.s, s.len, s.s);
d74b7829
 			goto error;
 		}
 		if(pvstate==2)
 		{
 			p++;
 			if(*p==PV_RNBRACKET)
 			{ /* full pv name ended here*/
 				goto done_vnm;
 			} else if(*p==PV_LIBRACKET) {
 				p++;
 				pvstate = 3;
 			} else if(*p==TR_LBRACKET) {
 				p++;
 				pvstate = 4;
 			} else {
15ec6f3c
 				if (!silent)
 					LM_ERR("invalid char '%c' in [%.*s] (%d)\n",
 								*p, in->len, in->s, pvstate);
d74b7829
 				goto error;
 			}
 		} else {
 			if(*p==PV_RNBRACKET)
 			{ /* full pv name ended here*/
 				p++;
 				goto done_all;
 			} else {
15ec6f3c
 				if (!silent)
 					LM_ERR("invalid char '%c' in [%.*s] (%d)\n",
 								*p, in->len, in->s, pvstate);
d74b7829
 				goto error;
 			}
 		}
 	}
 done_vnm:
 	if(pvstate==3)
 	{
 		if(pte->parse_index==NULL)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("pvar \"%.*s\" does not get index param\n",
 						pvname.len, pvname.s);
d74b7829
 			goto error;
 		}
 		s.s = p;
 		n = 0;
 		while(is_in_str(p, in))
 		{
 			if(*p==PV_RIBRACKET)
 			{
 				if(n==0)
 					break;
 				n--;
 			}
 			if(*p == PV_LIBRACKET)
 				n++;
 			p++;
 		}
 		if(!is_in_str(p, in))
 			goto error;
 
 		if(p==s.s)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("pvar \"%.*s\" does not get empty index param\n",
 						pvname.len, pvname.s);
d74b7829
 			goto error;
 		}
 		s.len = p - s.s;
 		if(pte->parse_index(e, &s)!=0)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("pvar \"%.*s\" has an invalid index param [%.*s]\n",
 						pvname.len, pvname.s, s.len, s.s);
d74b7829
 			goto error;
 		}
 		p++;
 		if(*p==PV_RNBRACKET)
 		{ /* full pv name ended here*/
 			goto done_idx;
 		} else if(*p==TR_LBRACKET) {
 			p++;
 			pvstate = 4;
 		} else {
15ec6f3c
 			if (!silent)
 				LM_ERR("invalid char '%c' in [%.*s] (%d)\n",
 							*p, in->len, in->s, pvstate);
d74b7829
 			goto error;
 		}
 	}
 done_idx:
 	if(pvstate==4)
 	{
 		s.s = p-1;
 		n = 0;
 		while(is_in_str(p, in))
 		{
 			if(*p==TR_RBRACKET)
 			{
 				if(n==0)
 				{
 					/* yet another transformation */
 					p++;
 					while(is_in_str(p, in) && (*p==' ' || *p=='\t')) p++;
 
 					if(!is_in_str(p, in) || *p != TR_LBRACKET)
 					{
 						p--;
 						break;
 					}
 				}
 				n--;
 			}
 			if(*p == TR_LBRACKET)
 				n++;
 			p++;
 		}
 		if(!is_in_str(p, in))
 			goto error;
 
 		if(p==s.s)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("pvar \"%.*s\" does not get empty index param\n",
 						pvname.len, pvname.s);
d74b7829
 			goto error;
 		}
 		s.len = p - s.s + 1;
 
 		p = tr_lookup(&s, &tr);
 		if(p==NULL)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("bad tr in pvar name \"%.*s\"\n", pvname.len, pvname.s);
d74b7829
 			goto error;
 		}
 		if(*p!=PV_RNBRACKET)
 		{
15ec6f3c
 			if (!silent)
 				LM_ERR("bad pvar name \"%.*s\" (%c)!\n", in->len, in->s, *p);
d74b7829
 			goto error;
 		}
 		e->trans = (void*)tr;
 	}
 	p++;
 
 done_all:
 	if(pte!=NULL && pte->init_param)
 		pte->init_param(e, pte->iparam);
 	return p;
 
 error:
15ec6f3c
 	if(p!=NULL){
 		if (!silent)
 			LM_ERR("wrong char [%c/%d] in [%.*s] at [%d (%d)]\n", *p, (int)*p,
 					in->len, in->s, (int)(p-in->s), pvstate);
 	}else{
 		if (!silent)
 			LM_ERR("invalid parsing in [%.*s] at (%d)\n",
 						in->len, in->s, pvstate);
 	}
d74b7829
 	return NULL;
 
 } /* end: pv_parse_spec */
 
d79388b3
 /**
  *
  */
 int pv_parse_format(str *in, pv_elem_p *el)
 {
 	char *p, *p0;
 	int n = 0;
 	pv_elem_p e, e0;
 	str s;
 
 	if(in==NULL || in->s==NULL || el==NULL)
 		return -1;
 
 	/*LM_DBG("parsing [%.*s]\n", in->len, in->s);*/
 	
 	if(in->len == 0)
 	{
 		*el = pkg_malloc(sizeof(pv_elem_t));
 		if(*el == NULL)
 			goto error;
 		memset(*el, 0, sizeof(pv_elem_t));
 		(*el)->text = *in;
 		return 0;
 	}
 
 	p = in->s;
 	*el = NULL;
 	e = e0 = NULL;
 
 	while(is_in_str(p,in))
 	{
 		e0 = e;
 		e = pkg_malloc(sizeof(pv_elem_t));
 		if(!e)
 			goto error;
 		memset(e, 0, sizeof(pv_elem_t));
 		n++;
 		if(*el == NULL)
 			*el = e;
 		if(e0)
 			e0->next = e;
 	
 		e->text.s = p;
 		while(is_in_str(p,in) && *p!=PV_MARKER)
 			p++;
 		e->text.len = p - e->text.s;
 		
 		if(*p == '\0' || !is_in_str(p,in))
 			break;
 		s.s = p;
 		s.len = in->s+in->len-p;
 		p0 = pv_parse_spec(&s, &e->spec);
 		
 		if(p0==NULL)
 			goto error;
 		if(*p0 == '\0')
 			break;
 		p = p0;
 	}
 	/*LM_DBG("format parsed OK: [%d] items\n", n);*/
 
 	if(*el == NULL)
 		return -1;
 
 	return 0;
 
 error:
 	pv_elem_free_all(*el);
 	*el = NULL;
 	return -1;
 }
 
037dd9e5
 int pv_get_spec_name(struct sip_msg* msg, pv_param_p ip, pv_value_t *name)
 {
 	if(msg==NULL || ip==NULL || name==NULL)
 		return -1;
 	memset(name, 0, sizeof(pv_value_t));
 
 	if(ip->pvn.type==PV_NAME_INTSTR)
 	{
 		if(ip->pvn.u.isname.type&AVP_NAME_STR)
 		{
 			name->rs = ip->pvn.u.isname.name.s;
 			name->flags = PV_VAL_STR;
 		} else {
 			name->ri = ip->pvn.u.isname.name.n;
 			name->flags = PV_VAL_INT|PV_TYPE_INT;
 		}
 		return 0;
a93f14f3
 	} else if(ip->pvn.type==PV_NAME_PVAR) {
037dd9e5
 		/* pvar */
 		if(pv_get_spec_value(msg, (pv_spec_p)(ip->pvn.u.dname), name)!=0)
 		{
 			LM_ERR("cannot get name value\n");
 			return -1;
 		}
 		if(name->flags&PV_VAL_NULL || name->flags&PV_VAL_EMPTY)
 		{
 			LM_ERR("null or empty name\n");
 			return -1;
 		}
 		return 0;
 	}
 	LM_ERR("name type is PV_NAME_OTHER - cannot resolve\n");
 	return -1;
 }
 
 int pv_get_avp_name(struct sip_msg* msg, pv_param_p ip, int_str *avp_name,
 		unsigned short *name_type)
 {
 	pv_value_t tv;
 	if(ip==NULL || avp_name==NULL || name_type==NULL)
 		return -1;
 	memset(avp_name, 0, sizeof(int_str));
 	*name_type = 0;
 
 	if(ip->pvn.type==PV_NAME_INTSTR)
 	{
 		*name_type = ip->pvn.u.isname.type;
 		if(ip->pvn.u.isname.type&AVP_NAME_STR)
 		{
 			avp_name->s = ip->pvn.u.isname.name.s;
 			*name_type |= AVP_NAME_STR;
 		} else {
 			avp_name->n = ip->pvn.u.isname.name.n;
0f09145b
 			/* *name_type &= AVP_SCRIPT_MASK; */
 			*name_type = 0;
037dd9e5
 		}
 		return 0;
 	}
 	/* pvar */
 	if(pv_get_spec_value(msg, (pv_spec_p)(ip->pvn.u.dname), &tv)!=0)
 	{
 		LM_ERR("cannot get avp value\n");
 		return -1;
 	}
 	if(tv.flags&PV_VAL_NULL || tv.flags&PV_VAL_EMPTY)
 	{
 		LM_ERR("null or empty name\n");
 		return -1;
 	}
 		
 	if((tv.flags&PV_TYPE_INT) && (tv.flags&PV_VAL_INT))
 	{
 		avp_name->n = tv.ri;
 	} else {
 		avp_name->s = tv.rs;
 		*name_type = AVP_NAME_STR;
 	}
 	return 0;
 }
 
 
 int pv_get_spec_index(struct sip_msg* msg, pv_param_p ip, int *idx, int *flags)
 {
 	pv_value_t tv;
 	if(ip==NULL || idx==NULL || flags==NULL)
 		return -1;
 
 	*idx = 0;
 	*flags = 0;
 
 	if(ip->pvi.type == PV_IDX_ALL) {
 		*flags = PV_IDX_ALL;
 		return 0;
 	}
 	
 	if(ip->pvi.type == PV_IDX_INT)
 	{
 		*idx = ip->pvi.u.ival;
 		return 0;
 	}
 
 	/* pvar */
 	if(pv_get_spec_value(msg, (pv_spec_p)ip->pvi.u.dval, &tv)!=0)
 	{
 		LM_ERR("cannot get index value\n");
 		return -1;
 	}
 	if(!(tv.flags&PV_VAL_INT))
 	{
 		LM_ERR("invalid index value\n");
 		return -1;
 	}
 	*idx = tv.ri;
 	return 0;
 }
 
d79388b3
 int pv_get_spec_value(struct sip_msg* msg, pv_spec_p sp, pv_value_t *value)
 {
 	int ret = 0;
 
 	if(msg==NULL || sp==NULL || sp->getf==NULL || value==NULL
 			|| sp->type==PVT_NONE)
 	{
 		LM_ERR("bad parameters\n");
 		return -1;
 	}
 	
 	memset(value, 0, sizeof(pv_value_t));
 
 	ret = (*sp->getf)(msg, &(sp->pvp), value);
 	if(ret!=0)
 		return ret;
037dd9e5
 		
d79388b3
 	if(sp->trans)
 		return tr_exec(msg, (trans_t*)sp->trans, value);
 	return ret;
 }
 
858146a9
 int pv_set_spec_value(struct sip_msg* msg, pv_spec_p sp, int op,
 		pv_value_t *value)
 {
 	if(sp==NULL || !pv_is_w(sp))
 		return 0; /* no op */
 	if(pv_alter_context(sp) && is_route_type(LOCAL_ROUTE))
 		return 0; /* no op */
 	return sp->setf(msg, &sp->pvp, op, value);
 }
 
d79388b3
 /**
  *
  */
 int pv_printf(struct sip_msg* msg, pv_elem_p list, char *buf, int *len)
 {
 	int n, h;
 	pv_value_t tok;
 	pv_elem_p it;
 	char *cur;
 	
 	if(msg==NULL || list==NULL || buf==NULL || len==NULL)
 		return -1;
 
 	if(*len <= 0)
 		return -1;
 
 	*buf = '\0';
 	cur = buf;
 	
 	h = 0;
 	n = 0;
 	for (it=list; it; it=it->next)
 	{
 		/* put the text */
 		if(it->text.s && it->text.len>0)
 		{
 			if(n+it->text.len < *len)
 			{
 				memcpy(cur, it->text.s, it->text.len);
 				n += it->text.len;
 				cur += it->text.len;
 			} else {
 				LM_ERR("no more space for text [%d]\n", it->text.len);
 				goto overflow;
 			}
 		}
 		/* put the value of the specifier */
 		if(it->spec.type!=PVT_NONE
 				&& pv_get_spec_value(msg, &(it->spec), &tok)==0)
 		{
 			if(tok.flags&PV_VAL_NULL)
 				tok.rs = pv_str_null;
 			if(n+tok.rs.len < *len)
 			{
 				if(tok.rs.len>0)
 				{
 					memcpy(cur, tok.rs.s, tok.rs.len);
 					n += tok.rs.len;
 					cur += tok.rs.len;
 				}
 			} else {
 				LM_ERR("no more space for spec value\n");
 				goto overflow;
 			}
 		}
 	}
 
 	goto done;
 	
 overflow:
 	LM_ERR("buffer overflow -- increase the buffer size...\n");
 	return -1;
 
 done:
 #ifdef EXTRA_DEBUG
 	LM_DBG("final buffer length %d\n", n);
 #endif
 	*cur = '\0';
 	*len = n;
 	return 0;
 }
 
0f09145b
 /**
  *
  */
 pvname_list_t* parse_pvname_list(str *in, unsigned int type)
 {
 	pvname_list_t* head = NULL;
 	pvname_list_t* al = NULL;
 	pvname_list_t* last = NULL;
 	char *p;
 	pv_spec_t spec;
 	str s;
 
 	if(in==NULL || in->s==NULL)
 	{
 		LM_ERR("bad parameters\n");
 		return NULL;
 	}
 
 	p = in->s;
 	while(is_in_str(p, in))
 	{
 		while(is_in_str(p, in) && (*p==' '||*p=='\t'||*p==','||*p==';'))
 			p++;
 		if(!is_in_str(p, in))
 		{
 			if(head==NULL)
 				LM_ERR("wrong item name list [%.*s]\n", in->len, in->s);
 			return head;
 		}
 		s.s=p;
 		s.len = in->s+in->len-p;
 		p = pv_parse_spec(&s, &spec);
 		if(p==NULL || (type && spec.type!=type))
 		{
 			LM_ERR("wrong item name list [%.*s]!\n", in->len, in->s);
 			goto error;
 		}
 		al = (pvname_list_t*)pkg_malloc(sizeof(pvname_list_t));
 		if(al==NULL)
 		{
 			LM_ERR("no more memory!\n");
 			goto error;
 		}
 		memset(al, 0, sizeof(pvname_list_t));
 		memcpy(&al->sname, &spec, sizeof(pv_spec_t));
 
 		if(last==NULL)
 		{
 			head = al;
 			last = al;
 		} else {
 			last->next = al;
 			last = al;
 		}
 	}
 
 	return head;
 
 error:
 	while(head)
 	{
 		al = head;
 		head=head->next;
 		pkg_free(al);
 	}
 	return NULL;
 }
d79388b3
 
 /**
  *
  */
d74b7829
 void pv_spec_free(pv_spec_t *spec)
 {
 	if(spec==0) return;
 	/* TODO: free name if it is PV */
 	if(spec->trans)
 		tr_free((trans_t*)spec->trans);
 	pkg_free(spec);
 }
 
d79388b3
 /**
  *
  */
 int pv_elem_free_all(pv_elem_p log)
 {
 	pv_elem_p t;
 	while(log)
 	{
 		t = log;
 		log = log->next;
 		pkg_free(t);
 	}
 	return 0;
 }
 
 /**
  *
  */
 void pv_value_destroy(pv_value_t *val)
 {
 	if(val==0) return;
 	if(val->flags&PV_VAL_PKG) pkg_free(val->rs.s);
 	if(val->flags&PV_VAL_SHM) shm_free(val->rs.s);
 	memset(val, 0, sizeof(pv_value_t));
 }
 
037dd9e5
 #define PV_PRINT_BUF_SIZE  1024
 #define PV_PRINT_BUF_NO    3
 int pv_printf_s(struct sip_msg* msg, pv_elem_p list, str *s)
 {
 	static int buf_itr = 0;
 	static char buf[PV_PRINT_BUF_NO][PV_PRINT_BUF_SIZE];
 
0a9e2275
 	s->s = buf[buf_itr];
 	s->len = PV_PRINT_BUF_SIZE;
 	buf_itr = (buf_itr+1)%PV_PRINT_BUF_NO;
 	return pv_printf( msg, list, s->s, &s->len);
037dd9e5
 }
d79388b3
 
 /********************************************************
  * Transformations API
  ********************************************************/
 
 /**
  *
  */
d74b7829
 static inline char* tr_get_class(str *in, char *p, str *tclass)
 {
 	tclass->s = p;
 	while(is_in_str(p, in) && *p!=TR_CLASS_MARKER) p++;
 	if(*p!=TR_CLASS_MARKER || tclass->s == p)
 	{
 		LM_ERR("invalid transformation: %.*s (%c)!\n", in->len, in->s, *p);
 		return NULL;
 	}
 	tclass->len = p - tclass->s;
 	p++;
 
 	return p;
 }
 
d79388b3
 /**
  *
  */
037dd9e5
 static inline trans_t* tr_new(void)
d74b7829
 {
 	trans_t *t = NULL;
 
 	t = (trans_t*)pkg_malloc(sizeof(trans_t));
 	if(t == NULL)
 	{
 		LM_ERR("no more private memory\n");
 		return NULL;
 	}
 	memset(t, 0, sizeof(trans_t));
 	return t;
 }
 
 char* tr_lookup(str *in, trans_t **tr)
 {
 	char *p;
 	char *p0;
 	str tclass;
 	tr_export_t *te = NULL; 
 	trans_t *t = NULL;
 	trans_t *t0 = NULL;
 	str s;
 
 	if(in==NULL || in->s==NULL || tr==NULL)
 		return NULL;
 	
 	p = in->s;
 	do {
 		while(is_in_str(p, in) && (*p==' ' || *p=='\t' || *p=='\n')) p++;
 		if(*p != TR_LBRACKET)
 			break;
 		p++;
 
 		if((t = tr_new())==NULL) return NULL;
 
 		if(t0==NULL) *tr = t;
 		else t0->next = t;
 		t0 = t;
 
 		/* find transformation class */
 		p = tr_get_class(in, p, &tclass);
 		if(p==NULL) goto error;
 
 		/* locate transformation */
 		te = tr_lookup_class(&tclass);
 		if(te==NULL)
 		{
 			LM_ERR("unknown transformation: [%.*s] in [%.*s]\n",
 				tclass.len, tclass.s, in->len, in->s);
 			goto error;
 		}
 
 		s.s = p; s.len = in->s + in->len - p;
 		p0 = te->tparse(&s, t);
 		if(p0==NULL)
 			goto error;
 		p = p0;
 
 		if(*p != TR_RBRACKET)
 		{
 			LM_ERR("invalid transformation: %.*s | %c !!\n", in->len,
 					in->s, *p);
 			goto error;
 		}
 
 		p++;
 		if(!is_in_str(p, in))
 			break;
 	} while(1);
 
 	return p;
 error:
 	LM_ERR("error parsing [%.*s]\n", in->len, in->s);
 	t = *tr;
 	while(t)
 	{
 		t0 = t;
 		t = t->next;
 		tr_destroy(t0);
 		pkg_free(t0);
 	}
 	return NULL;
 }
 
 /*!
  * \brief Destroy transformation including eventual parameter
  * \param t transformation
  */
 void tr_destroy(trans_t *t)
 {
 	tr_param_t *tp;
 	tr_param_t *tp0;
 	if(t==NULL) return;
 
 	tp = t->params;
 	while(tp)
 	{
 		tp0 = tp;
 		tp = tp->next;
 		tr_param_free(tp0);
 	}
 	memset(t, 0, sizeof(trans_t));
 }
 
037dd9e5
 /*!
  * \brief Exec transformation on a pseudo-variable value
  * \param msg SIP message
  * \param tr one or more transformations
  * \param val pseudo-variable value
  * \return 0 on success, -1 on error
  */
 
d79388b3
 int tr_exec(struct sip_msg *msg, trans_t *t, pv_value_t *v)
 {
 	int r;
 	trans_t *i;
 
 	if(t==NULL || v==NULL)
 	{
 		LM_DBG("invalid parameters\n");
 		return -1;
 	}
 	
 	for(i = t; i!=NULL; i=i->next)
 	{
 		r = (*i->trf)(msg, i->params, i->subtype, v);
 		if(r!=0)
 			return r;
 	}
 	return 0;
 }
d74b7829
 
 /*!
  * \brief Free allocated memory of transformation list
  * \param t transformation list
  */
 void tr_free(trans_t *t)
 {
 	trans_t *t0;
 
 	while(t)
 	{
 		t0 = t;
 		t = t->next;
 		tr_destroy(t0);
 		pkg_free(t0);
 	}
 }
 
 
 /*!
  * \brief Free transformation parameter list
  * \param tp transformation list
  */
 void tr_param_free(tr_param_t *tp)
 {
 	tr_param_t *tp0;
 
 	if(tp==NULL) return;
 	while(tp)
 	{
 		tp0 = tp;
 		tp = tp->next;
 		if(tp0->type==TR_PARAM_SPEC)
 			pv_spec_free((pv_spec_t*)tp0->v.data);
 		pkg_free(tp0);
 	}
 }
 
 typedef struct _tr_item
 {
 	tr_export_t tre;
 	unsigned int trid;
 	struct _tr_item *next;
 } tr_item_t, *tr_item_p;
 
037dd9e5
 static tr_item_t* _tr_table[TR_TABLE_SIZE];
d74b7829
 static int _tr_table_set = 0;
 
 
 /**
  *
  */
037dd9e5
 void tr_init_table(void)
d74b7829
 {
 	memset(_tr_table, 0, sizeof(tr_item_t*)*TR_TABLE_SIZE);
 	_tr_table_set = 1;
 }
 
 /**
  *
  */
 int tr_table_add(tr_export_t *e)
 {
 	tr_item_t *tri = NULL;
 	tr_item_t *trj = NULL;
 	tr_item_t *trn = NULL;
 	int found;
0f09145b
 	unsigned int trid;
d74b7829
 
 	if(e==NULL || e->tclass.s==NULL)
 	{
 		LM_ERR("invalid parameters\n");
 		return -1;
 	}
 	
 	if(_tr_table_set==0)
 	{
 		LM_DBG("TR table not initialized, doing it now\n");
 		tr_init_table();
 	}
 
 	found = 0;
037dd9e5
 	// trid = get_hash1_raw(e->tclass.s, e->tclass.len);
75b58438
 	trid = get_hash1_raw(e->tclass.s, e->tclass.len);
d74b7829
 
037dd9e5
 	tri = _tr_table[trid%TR_TABLE_SIZE];
d74b7829
 	while(tri)
 	{
 		if(tri->tre.tclass.len==e->tclass.len)
 		{
 			found = strncmp(tri->tre.tclass.s, e->tclass.s, e->tclass.len);
 			if(found==0)
 			{
 				LM_ERR("TR class [%.*s] already exists\n", e->tclass.len,
 						e->tclass.s);
 				return -1;
 			}
 		}
 		trj = tri;
 		tri = tri->next;
 	}
 
 	trn = (tr_item_t*)pkg_malloc(sizeof(tr_item_t));
 	if(trn==0)
 	{
 		LM_ERR("no more memory\n");
 		return -1;
 	}
 	memset(trn, 0, sizeof(tr_item_t));
 	memcpy(&(trn->tre), e, sizeof(tr_export_t));
 	trn->trid = trid;
 
037dd9e5
 	//LM_DBG("TR class [%.*s] added to entry [%d]\n", e->tclass.len,
 	//					e->tclass.s, trid%TR_TABLE_SIZE);
d74b7829
 	if(trj==0)
 	{
037dd9e5
 		trn->next = _tr_table[trid%TR_TABLE_SIZE];
 		_tr_table[trid%TR_TABLE_SIZE] = trn;
d74b7829
 		goto done;
 	}
 	trn->next = trj->next;
 	trj->next = trn;
 
 done:
 	return 0;
 }
 
 /**
  *
  */
 int register_trans_mod(char *mod_name, tr_export_t *items)
 {
 	int ret;
 	int i;
 
 	if (items==0)
 		return 0;
 
 	for ( i=0 ; items[i].tclass.s ; i++ ) {
 		ret = tr_table_add(&items[i]);
 		if (ret!=0) {
 			LM_ERR("failed to register pseudo-variable <%.*s> for module %s\n",
 					items[i].tclass.len, items[i].tclass.s, mod_name);
 		}
 	}
 	return 0;
 }
 
 /**
  *
  */
 int tr_table_free(void)
 {
 	tr_item_p te;
 	tr_item_p te1;
 	int i;
 
 	for(i=0; i<TR_TABLE_SIZE; i++)
 	{
 		te = _tr_table[i];
 		while(te!=0)
 		{
 			te1 = te;
 			te = te->next;
 			pkg_free(te1);
 		}
 	}
8c3a7158
 	memset(_tr_table, 0, sizeof(tr_item_t*)*TR_TABLE_SIZE);
 	_tr_table_set = 0;
d74b7829
 	
 	return 0;
 }
 
 tr_export_t* tr_lookup_class(str *tclass)
 {
 	tr_item_t *tri;
 	unsigned int trid;
 
 	if(tclass==0 || tclass->s==0)
 	{
 		LM_ERR("bad parameters\n");
 		return NULL;
 	}
 
 	/* search in TR table */
037dd9e5
 	// trid = get_hash1_raw(tclass->s, tclass->len);
75b58438
 	trid = get_hash1_raw(tclass->s, tclass->len);
d74b7829
 	tri = _tr_table[trid%TR_TABLE_SIZE];
 	while(tri)
 	{
 		if(tri->trid==trid && tri->tre.tclass.len==tclass->len
 				&& memcmp(tri->tre.tclass.s, tclass->s, tclass->len)==0)
 			return &(tri->tre);
 		tri = tri->next;
 	}
 
 	return NULL;
 }
 
8c3a7158
 
 /** init pv api (optional).
  * @return 0 on success, -1 on error
  */
 int init_pv_api(void)
 {
 	pv_init_table();
 	tr_init_table();
 	return 0;
 }
 
 
 /** destroy pv api. */
 void destroy_pv_api(void)
037dd9e5
 {
 	/* free PV and TR hash tables */
8c3a7158
 	pv_table_free();
 	tr_table_free();
037dd9e5
 	return;
 }