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route.c
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/*
* SIP routing engine
*
* Copyright (C) 2001-2003 FhG Fokus
* Copyright (C) 2005-2006 Voice Sistem S.R.L.
*
* 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:
* --------
* 2003-01-28 scratchpad removed, src_port introduced (jiri)
* 2003-02-28 scratchpad compatibility abandoned (jiri)
* 2003-03-10 updated to the new module exports format (andrei)
* 2003-03-19 replaced all mallocs/frees w/ pkg_malloc/pkg_free (andrei)
* 2003-04-01 added dst_port, proto, af; renamed comp_port to comp_no,
* inlined all the comp_* functions (andrei)
* 2003-04-05 s/reply_route/failure_route, onreply_route introduced (jiri)
* 2003-05-23 comp_ip fixed, now it will resolve its operand and compare
* the ip with all the addresses (andrei)
* 2003-10-10 added more operators support to comp_* (<,>,<=,>=,!=) (andrei)
* 2004-10-19 added from_uri & to_uri (andrei)
* 2006-03-02 MODULE_T action points to a cmd_export_t struct instead to
* a function address - more info is accessible (bogdan)
* Fixup failure reports the config line (bogdan)
* 2006-12-22 support for script and branch flags added (bogdan)
*/
/*!
* \file
* \brief SIP routing engine
*/
#include <stdlib.h>
#include <sys/types.h>
#include <regex.h>
#include <netdb.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include "route.h"
#include "forward.h"
#include "dprint.h"
#include "proxy.h"
#include "action.h"
#include "sr_module.h"
#include "ip_addr.h"
#include "resolve.h"
#include "socket_info.h"
#include "blacklists.h"
#include "mem/mem.h"
#include "xlog.h"
#include "evi/evi_modules.h"
#include "mod_fix.h"
/* instance of script routes used for script interpreting */
struct os_script_routes *sroutes = NULL;
int route_type = REQUEST_ROUTE;
static int fix_actions(struct action* a); /*fwd declaration*/
extern int return_code;
str str_route = str_init("route");
str str_request_route = str_init("request_route");
str str_failure_route = str_init("failure_route");
str str_onreply_route = str_init("onreply_route");
str str_branch_route = str_init("branch_route");
str str_error_route = str_init("error_route");
str str_local_route = str_init("local_route");
str str_startup_route = str_init("startup_route");
str str_timer_route = str_init("timer_route");
str str_event_route = str_init("event_route");
/*!
* \brief Allocates and initializes a new routing list holder
*/
struct os_script_routes* new_sroutes_holder(void)
{
struct os_script_routes *sr;
sr = (struct os_script_routes *) pkg_malloc
( sizeof(struct os_script_routes) );
if ( sr==NULL) {
LM_ERR("failed to allocate table for script routes\n");
return NULL;
}
memset( sr, 0, sizeof(struct os_script_routes) );
sr->request[DEFAULT_RT].name = "0";
sr->onreply[DEFAULT_RT].name = "0";
return sr;
}
/*!
* \brief Frees a routing list holder
*/
void free_route_lists(struct os_script_routes *sr)
{
int i;
for( i=0 ; i<RT_NO ; i++ )
if (sr->request[i].a)
free_action_list(sr->request[i].a);
for( i=0 ; i<ONREPLY_RT_NO ; i++ )
if (sr->onreply[i].a)
free_action_list(sr->onreply[i].a);
for( i=0 ; i<FAILURE_RT_NO ; i++ )
if (sr->failure[i].a)
free_action_list(sr->failure[i].a);
for( i=0 ; i<BRANCH_RT_NO ; i++ )
if (sr->branch[i].a)
free_action_list(sr->branch[i].a);
if (sr->local.a)
free_action_list(sr->local.a);
if (sr->error.a)
free_action_list(sr->error.a);
if (sr->startup.a)
free_action_list(sr->startup.a);
for( i=0 ; i<TIMER_RT_NO ; i++ )
if (sr->timer[i].a)
free_action_list(sr->timer[i].a);
for( i=0 ; i<EVENT_RT_NO ; i++ )
if (sr->event[i].a)
free_action_list(sr->event[i].a);
}
/************************** Generic functions ***********************/
int get_script_route_ID_by_name(char *name, struct script_route *sr, int size)
{
unsigned int i;
for(i=1;i<size;i++) {
if (sr[i].name==0)
return -1;
if (strcmp(sr[i].name,name)==0 )
return i;
}
return -1;
}
int get_script_route_ID_by_name_str(str *name, struct script_route *sr, int size)
{
unsigned int i;
for(i=1;i<size;i++) {
if (sr[i].name==0)
return -1;
if (strlen(sr[i].name)==name->len &&
strncmp(sr[i].name, name->s, name->len) == 0)
return i;
}
return -1;
}
/********************** Interpreter related functions ***********************/
/*! \brief comp_scriptvar helping function */
inline static int comp_ip(int op, str *ip_str, struct net *ipnet)
{
struct ip_addr *ip_tmp = NULL;
ip_tmp = str2ip(ip_str);
if (!ip_tmp) {
ip_tmp = str2ip6(ip_str);
if (!ip_tmp) {
LM_DBG("Var value is not an IP\n");
return -1;
}
}
if (op == EQUAL_OP) {
return (matchnet(ip_tmp, ipnet) == 1);
} else if (op == DIFF_OP) {
return (matchnet(ip_tmp, ipnet) != 1);
} else {
LM_CRIT("invalid operator %d\n", op);
return -1;
}
}
/*! \brief compare str to str */
inline static int comp_s2s(int op, str *s1, str *s2)
{
#define make_nt_copy(_sd,_so) \
do { \
if (pkg_str_extend(_sd, (_so)->len+1)<0) \
return -1; \
memcpy((_sd)->s, (_so)->s, (_so)->len);\
(_sd)->s[(_so)->len] = '\0'; \
} while(0)
static str cp1 = {NULL,0};
static str cp2 = {NULL,0};
int rt;
int ret;
regex_t* re;
ret = -1;
/* check the input values :
* s1 - must be a non-empty string
* s2 - must be a non-empty string or a regexp* for [NOT]MATCH_OP */
if ( s1->s==NULL )
return 0;
switch(op) {
case EQUAL_OP:
if ( s2->s==NULL) return 0;
ret = str_casematch(s1, s2);
break;
case DIFF_OP:
if ( s2->s==NULL ) return 0;
ret = !str_casematch(s1, s2);
break;
case GT_OP:
if ( s2->s==NULL ) return 0;
rt = str_strcasecmp(s1, s2);
if (rt>0)
ret = 1;
else if(rt==0 && s1->len>s2->len)
ret = 1;
else ret = 0;
break;
case GTE_OP:
if ( s2->s==NULL ) return 0;
rt = str_strcasecmp(s1, s2);
if (rt>0)
ret = 1;
else if(rt==0 && s1->len>=s2->len)
ret = 1;
else ret = 0;
break;
case LT_OP:
if ( s2->s==NULL ) return 0;
rt = str_strcasecmp(s1, s2);
if (rt<0)
ret = 1;
else if(rt==0 && s1->len<s2->len)
ret = 1;
else ret = 0;
break;
case LTE_OP:
if ( s2->s==NULL ) return 0;
rt = str_strcasecmp(s1, s2);
if (rt<0)
ret = 1;
else if(rt==0 && s1->len<=s2->len)
ret = 1;
else ret = 0;
break;
case MATCH_OP:
if ( s2==NULL ) return 0;
make_nt_copy( &cp1, s1);
ret=(regexec((regex_t*)s2, cp1.s, 0, 0, 0)==0);
break;
case NOTMATCH_OP:
if ( s2==NULL ) return 1;
make_nt_copy( &cp1, s1);
ret=(regexec((regex_t*)s2, cp1.s, 0, 0, 0)!=0);
break;
case MATCHD_OP:
case NOTMATCHD_OP:
if ( s2==NULL || s2->s==NULL)
return (op == MATCHD_OP? 0 : 1);
re=(regex_t*)pkg_malloc(sizeof(regex_t));
if (re==0) {
LM_CRIT("pkg memory allocation failure\n");
return -1;
}
make_nt_copy( &cp1, s1);
make_nt_copy( &cp2, s2);
if (regcomp(re, cp2.s, REG_EXTENDED|REG_NOSUB|REG_ICASE)) {
pkg_free(re);
return -1;
}
if(op==MATCHD_OP)
ret=(regexec(re, cp1.s, 0, 0, 0)==0);
else
ret=(regexec(re, cp1.s, 0, 0, 0)!=0);
regfree(re);
pkg_free(re);
break;
default:
LM_CRIT("unknown op %d\n", op);
}
return ret;
}
/*! \brief compare nr to nr */
inline static int comp_n2n(int op, int n1, int n2)
{
switch(op) {
case EQUAL_OP:
case MATCH_OP:
case MATCHD_OP:
if(n1 == n2)
return 1;
return 0;
case NOTMATCH_OP:
case NOTMATCHD_OP:
case DIFF_OP:
if(n1 != n2)
return 1;
return 0;
case GT_OP:
if(n1 > n2)
return 1;
return 0;
case GTE_OP:
if(n1 >= n2)
return 1;
return 0;
case LT_OP:
if(n1 < n2)
return 1;
return 0;
case LTE_OP:
if(n1 <= n2)
return 1;
return 0;
default:
LM_CRIT("unknown op %d\n", op);
}
return -1;
}
static inline const char *op_id_2_string(int op_id)
{
switch (op_id) {
case EQUAL_OP:
return "EQUAL";
case MATCH_OP:
return "REGEXP_MATCH";
case NOTMATCH_OP:
return "REGEXP_NO_MATCH";
case MATCHD_OP:
return "DYN_REGEXP_MATCH";
case NOTMATCHD_OP:
return "DYN_REGEXP_NO_MATCH";
case GT_OP:
return "GREATER_THAN";
case LT_OP:
return "LESS_THAN";
case GTE_OP:
return "GREATER_OR_EQUAL";
case LTE_OP:
return "LESS_OR_EQUAL";
case DIFF_OP:
return "DIFFERENT_THAN";
case VALUE_OP:
return "VALUE";
case NO_OP:
default:
return "NONE";
}
}
static inline const char *expr_type_2_string(int expr_type)
{
switch (expr_type) {
case STRING_ST:
return "STRING";
case NET_ST:
return "NET_MASK";
case NUMBER_ST:
return "NUMBER";
case IP_ST:
return "IP";
case RE_ST:
return "REGEXP";
case PROXY_ST:
return "PROXY";
case EXPR_ST:
return "EXPRESSION";
case ACTIONS_ST:
return "ACTION";
case CMD_ST:
return "FUNCTION";
case MODFIXUP_ST:
return "MOD_FIXUP";
case STR_ST:
return "STR";
case SOCKID_ST:
return "SOCKET";
case SOCKETINFO_ST:
return "SOCKET_INFO";
case SCRIPTVAR_ST:
return "VARIABLE";
case NULLV_ST:
return "NULL";
case BLACKLIST_ST:
return "BLACKLIST";
case SCRIPTVAR_ELEM_ST:
return "VARIABLE_ELEMENT";
case NOSUBTYPE:
default:
return"NONE";
}
}
static inline const char *val_type_2_string(int val_type)
{
if (val_type&PV_VAL_STR)
return "STRING_VAL";
if (val_type&PV_VAL_INT)
return "INTEGER_VAL";
if (val_type&PV_VAL_NULL)
return "NULL_VAL";
if (val_type&PV_VAL_EMPTY)
return "EMPTY_VAL";
return "NO_VAL";
}
inline static int comp_scriptvar(struct sip_msg *msg, int op, operand_t *left,
operand_t *right)
{
str lstr;
str rstr;
int ln;
int rn;
pv_value_t lvalue;
pv_value_t rvalue;
int type;
struct net *rnet;
lstr.s = 0; lstr.len = 0;
rstr.s = 0; rstr.len = 0;
ln = 0; rn =0;
if(pv_get_spec_value(msg, left->v.spec, &lvalue)!=0)
{
LM_ERR("cannot get left var value\n");
goto error;
}
if(right->type==NULLV_ST)
{
if(op==EQUAL_OP)
{
if(lvalue.flags&PV_VAL_NULL)
return 1;
return 0;
} else {
if(lvalue.flags&PV_VAL_NULL)
return 0;
return 1;
}
}
lstr = lvalue.rs;
ln = lvalue.ri;
type = 0;
rvalue.flags = 0; /*just for err printing purposes */
if(right->type == SCRIPTVAR_ST)
{
if(pv_get_spec_value(msg, right->v.spec, &rvalue)!=0)
{
LM_ERR("cannot get right var value\n");
goto error;
}
if(rvalue.flags&PV_VAL_NULL || lvalue.flags&PV_VAL_NULL ) {
if (rvalue.flags&PV_VAL_NULL && lvalue.flags&PV_VAL_NULL )
return (op==EQUAL_OP || op==MATCH_OP || op==MATCHD_OP)?1:0;
return (op==DIFF_OP || op==NOTMATCH_OP || op==NOTMATCHD_OP)?1:0;
}
if(op==MATCH_OP||op==NOTMATCH_OP)
{
if(!((rvalue.flags&PV_VAL_STR) && (lvalue.flags&PV_VAL_STR)))
goto error_op;
if(op==MATCH_OP)
return comp_s2s(MATCHD_OP, &lstr, &rvalue.rs);
else
return comp_s2s(NOTMATCHD_OP, &lstr, &rvalue.rs);
}
if((rvalue.flags&PV_VAL_INT) && (lvalue.flags&PV_VAL_INT)) {
/* comparing int */
rn = rvalue.ri;
type = 2;
} else if((rvalue.flags&PV_VAL_STR) && (lvalue.flags&PV_VAL_STR)) {
/* comparing string */
rstr = rvalue.rs;
type = 1;
} else
goto error_op;
} else {
/* null against a not-null constant */
if(lvalue.flags&PV_VAL_NULL)
return (op==DIFF_OP || op==NOTMATCH_OP || op==NOTMATCHD_OP)?1:0;
if(right->type == STR_ST) {
if(!(lvalue.flags&PV_VAL_STR))
goto error_op;
/* comparing string */
type = 1;
rstr = right->v.s;
} else if(right->type == NUMBER_ST) {
if(!(lvalue.flags&PV_VAL_INT))
goto error_op;
/* comparing int */
type = 2;
rn = right->v.n;
} else if (right->type == NET_ST) {
if(!(lvalue.flags&PV_VAL_STR))
goto error_op;
/* comparing IP */
type = 3;
rnet = (struct net*)right->v.data;
} else {
if(op==MATCH_OP || op==NOTMATCH_OP)
{
if(!(lvalue.flags&PV_VAL_STR) || right->type != RE_ST)
goto error_op;
return comp_s2s(op, &lstr, (str*)right->v.expr);
}
/* comparing others */
type = 0;
}
}
switch (type) {
case 1: /* compare str */
LM_DBG("str %d: %.*s\n", op, lstr.len, lstr.s);
return comp_s2s(op, &lstr, &rstr);
case 2:
LM_DBG("int %d: %d / %d\n", op, ln, rn);
return comp_n2n(op, ln, rn);
case 3:
LM_DBG("ip %d: %.*s\n", op, lstr.len, lstr.s);
return comp_ip(op, &lstr, rnet);
}
/* default is error */
error_op:
LM_WARN("invalid %s operation: left is %s/%s, right is %s/%s\n",
op_id_2_string(op),
expr_type_2_string(left->type), val_type_2_string(lvalue.flags),
expr_type_2_string(right->type), val_type_2_string(rvalue.flags) );
error:
return -1;
}
/*! \brief
* \return 0/1 (false/true) or -1 on error, -127 EXPR_DROP
*/
static int eval_elem(struct expr* e, struct sip_msg* msg, pv_value_t *val)
{
int ret;
/* int retl;
int retr; */
int ival;
pv_value_t lval;
pv_value_t rval;
char *p;
int i,n;
ret=E_BUG;
if (e->type!=ELEM_T){
LM_CRIT("invalid type\n");
goto error;
}
if(val) memset(val, 0, sizeof(pv_value_t));
switch(e->left.type){
case NUMBER_O:
ret=!(!e->right.v.n); /* !! to transform it in {0,1} */
break;
case ACTION_O:
ret=run_action_list( (struct action*)e->right.v.data, msg);
if(val)
{
val->flags = PV_TYPE_INT|PV_VAL_INT;
val->ri = ret;
}
if (ret<=0) ret=(ret==0)?EXPR_DROP:0;
else ret=1;
return ret;
case EXPR_O:
/* retl = retr = 0; */
memset(&lval, 0, sizeof(pv_value_t));
memset(&rval, 0, sizeof(pv_value_t));
if(e->left.v.data)
eval_expr((struct expr*)e->left.v.data,msg,&lval);
/* XXX why is retl used here ?? */
/* retl=eval_expr((struct expr*)e->left.v.data,msg,&lval); */
if(lval.flags == PV_VAL_NONE)
{
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
if(e->op == BNOT_OP)
{
if(lval.flags&PV_VAL_INT)
{
if(val!=NULL)
{
val->flags = PV_TYPE_INT|PV_VAL_INT;
val->ri = ~lval.ri;
}
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return (val->ri)?1:0;
}
LM_ERR("binary NOT on non-numeric value\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
if(e->right.v.data)
eval_expr((struct expr*)e->right.v.data,msg,&rval);
/* retr=eval_expr((struct expr*)e->right.v.data,msg,&rval); */
if(lval.flags&PV_TYPE_INT)
{
if( (rval.flags&PV_VAL_NULL) )
{
rval.ri = 0;
} else if(!(rval.flags&PV_VAL_INT))
{
LM_ERR("invalid numeric operands\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
if(val!=NULL)
val->flags = PV_TYPE_INT|PV_VAL_INT;
ival = 0;
switch(e->op) {
case PLUS_OP:
ival = lval.ri + rval.ri;
break;
case MINUS_OP:
ival = lval.ri - rval.ri;
break;
case DIV_OP:
if(rval.ri==0)
{
LM_ERR("divide by 0\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
} else
ival = lval.ri / rval.ri;
break;
case MULT_OP:
ival = lval.ri * rval.ri;
break;
case MODULO_OP:
if(rval.ri==0)
{
LM_ERR("divide by 0\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
} else
ival = lval.ri % rval.ri;
break;
case BAND_OP:
ival = lval.ri & rval.ri;
break;
case BOR_OP:
ival = lval.ri | rval.ri;
break;
case BXOR_OP:
ival = lval.ri ^ rval.ri;
break;
case BLSHIFT_OP:
ival = lval.ri << rval.ri;
break;
case BRSHIFT_OP:
ival = lval.ri >> rval.ri;
break;
default:
LM_ERR("invalid int op %d\n", e->op);
if(val!=NULL) val->ri = 0;
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
pv_value_destroy(&lval);
pv_value_destroy(&rval);
if(val!=NULL) val->ri = ival;
return (ival)?1:0;
} else if (e->op == PLUS_OP) {
if (!val) {
ret = (lval.rs.len>0 || rval.rs.len>0);
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return ret;
}
if (rval.flags & PV_VAL_NULL) {
pv_value_destroy(&rval);
rval.flags = PV_VAL_STR;
}
if(!(rval.flags&PV_VAL_STR))
{
LM_ERR("invalid string operands\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
val->rs.s=(char*)pkg_malloc((lval.rs.len+rval.rs.len+1)
*sizeof(char));
if(val->rs.s==0)
{
LM_ERR("no more memory\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
val->flags = PV_VAL_PKG|PV_VAL_STR;
memcpy(val->rs.s, lval.rs.s, lval.rs.len);
memcpy(val->rs.s+lval.rs.len, rval.rs.s, rval.rs.len);
val->rs.len = lval.rs.len + rval.rs.len;
val->rs.s[val->rs.len] = '\0';
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 1;
} else if ((lval.flags & PV_VAL_STR) && (rval.flags & PV_VAL_STR)) {
if (lval.rs.len != rval.rs.len)
{
LM_ERR("Different length string operands\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
n = lval.rs.len;
val->rs.s = pkg_malloc(n+1);
if (!val->rs.s)
{
LM_ERR("no more memory\n");
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
switch(e->op) {
case BAND_OP:
for (i=0;i<n;i++)
val->rs.s[i] = lval.rs.s[i] & rval.rs.s[i];
break;
case BOR_OP:
for (i=0;i<n;i++)
val->rs.s[i] = lval.rs.s[i] | rval.rs.s[i];
break;
case BXOR_OP:
for (i=0;i<n;i++)
val->rs.s[i] = lval.rs.s[i] ^ rval.rs.s[i];
break;
default:
LM_ERR("Only bitwise operations can be applied on strings\n");
val->ri = 0;
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
val->flags = PV_VAL_PKG|PV_VAL_STR;
val->rs.len = n;
val->rs.s[n] = '\0';
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 1;
}
else {
LM_ERR("Invalid operator : %d \n",e->op);
pv_value_destroy(&lval);
pv_value_destroy(&rval);
return 0;
}
break;
case STRINGV_O:
if(val) {
val->flags = PV_VAL_STR;
val->rs = e->left.v.s;
}
/* optimization for no dup ?!?! */
return (e->left.v.s.len>0)?1:0;
case NUMBERV_O:
if(val) {
val->flags = PV_TYPE_INT|PV_VAL_INT;
val->ri = e->left.v.n;
}
ret=!(!e->left.v.n); /* !! to transform it in {0,1} */
return ret;
case SCRIPTVAR_O:
if(e->op==NO_OP)
{
memset(&rval, 0, sizeof(pv_value_t));
if(pv_get_spec_value(msg, e->right.v.spec, &rval)==0)
{
if(rval.flags==PV_VAL_NONE || (rval.flags&PV_VAL_NULL)
|| (rval.flags&PV_VAL_EMPTY)
|| ((rval.flags&PV_TYPE_INT)&&rval.ri==0))
{
pv_value_destroy(&rval);
return 0;
}
if(rval.flags&PV_TYPE_INT)
{
pv_value_destroy(&rval);
return 1;
}
if(rval.rs.len!=0)
{
pv_value_destroy(&rval);
return 1;
}
pv_value_destroy(&rval);
}
return 0;
}
if(e->op==VALUE_OP)
{
if(pv_get_spec_value(msg, e->left.v.spec, &lval)==0)
{
if(val!=NULL)
memcpy(val, &lval, sizeof(pv_value_t));
if(lval.flags&PV_VAL_STR)
{
if(!((lval.flags&PV_VAL_PKG)
|| (lval.flags&PV_VAL_SHM)))
{
if(val!=NULL)
{
/* do pkg duplicate */
p = (char*)pkg_malloc((val->rs.len+1)
*sizeof(char));
if(p==0)
{
LM_ERR("no more pkg memory\n");
memset(val, 0, sizeof(pv_value_t));
return 0;
}
memcpy(p, val->rs.s, val->rs.len);
p[val->rs.len] = 0;
val->rs.s = p;
val->flags|= PV_VAL_PKG;
}
}
return 1;
}
if(lval.flags==PV_VAL_NONE
|| (lval.flags & PV_VAL_NULL)
|| (lval.flags & PV_VAL_EMPTY))
return 0;
if(lval.flags&PV_TYPE_INT)
return (lval.ri!=0);
else
return (lval.rs.len>0);
}
return 0;
}
ret=comp_scriptvar(msg, e->op, &e->left, &e->right);
break;
default:
LM_CRIT("invalid operand %d\n", e->left.type);
}
if(val)
{
val->flags = PV_TYPE_INT|PV_VAL_INT;
val->ri = ret;
}
return ret;
error:
if(val)
{
val->flags = PV_TYPE_INT|PV_VAL_INT;
val->ri = -1;
}
return -1;
}
/*! \return ret= 0/1 (false/true) , -1 on error or EXPR_DROP (-127) */
int eval_expr(struct expr* e, struct sip_msg* msg, pv_value_t *val)
{
static int rec_lev=0;
int ret;
rec_lev++;
if (rec_lev>MAX_REC_LEV){
LM_CRIT("too many expressions (%d)\n", rec_lev);
ret=-1;
goto skip;
}
if (e->type==ELEM_T){
ret=eval_elem(e, msg, val);
}else if (e->type==EXP_T){
switch(e->op){
case AND_OP:
ret=eval_expr(e->left.v.expr, msg, val);
/* if error or false stop evaluating the rest */
if (ret!=1) break;
ret=eval_expr(e->right.v.expr, msg, val); /*ret1 is 1*/
break;
case OR_OP:
ret=eval_expr(e->left.v.expr, msg, val);
/* if true or error stop evaluating the rest */
if (ret!=0) break;
ret=eval_expr(e->right.v.expr, msg, val); /* ret1 is 0 */
break;
case NOT_OP:
ret=eval_expr(e->left.v.expr, msg, val);
if (ret<0) break;
ret= ! ret;
break;
case EVAL_OP:
ret=eval_expr(e->left.v.expr, msg, val);
break;
default:
LM_CRIT("unknown op %d\n", e->op);
ret=-1;
}
}else{
LM_CRIT("unknown type %d\n", e->type);
ret=-1;
}
skip:
rec_lev--;
return ret;
}
int run_startup_route(void)
{
struct sip_msg *req;
int ret, old_route_type;
req = get_dummy_sip_msg();
if(req == NULL) {
LM_ERR("No more memory\n");
return -1;
}
swap_route_type(old_route_type, STARTUP_ROUTE);
/* run the route */
ret = run_top_route( sroutes->startup, req);
set_route_type(old_route_type);
/* clean whatever extra structures were added by script functions */
release_dummy_sip_msg(req);
return ret;
}
/********************* Parsing/fixing related functions *********************/