git.sip-router.org Git - sip-router/blob - route.c

   1 /*
   2  * $Id$
   3  *
   4  * SIP routing engine
   5  *
   6  *
   7  * Copyright (C) 2001-2003 FhG Fokus
   8  *
   9  * This file is part of ser, a free SIP server.
  10  *
  11  * ser is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version
  15  *
  16  * For a license to use the ser software under conditions
  17  * other than those described here, or to purchase support for this
  18  * software, please contact iptel.org by e-mail at the following addresses:
  19  *    info@iptel.org
  20  *
  21  * ser is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29  *
  30  * History:
  31  * --------
  32  *  2003-01-28  scratchpad removed, src_port introduced (jiri)
  33  *  2003-02-28  scratchpad compatibility abandoned (jiri)
  34  *  2003-03-10  updated to the new module exports format (andrei)
  35  *  2003-03-19  replaced all mallocs/frees w/ pkg_malloc/pkg_free (andrei)
  36  *  2003-04-01  added dst_port, proto, af; renamed comp_port to comp_no,
  37  *               inlined all the comp_* functions (andrei)
  38  *  2003-04-05  s/reply_route/failure_route, onreply_route introduced (jiri)
  39  *  2003-05-23  comp_ip fixed, now it will resolve its operand and compare
  40  *              the ip with all the addresses (andrei)
  41  *  2003-10-10  added more operators support to comp_* (<,>,<=,>=,!=) (andrei)
  42  *  2004-10-19  added from_uri & to_uri (andrei)
  43  *  2005-12-12  added retcode support (anrei)
  44  *  2005-12-19  select framework (mma)
  45  *  2006-01-30  removed rec. protection from eval_expr (andrei)
  46  *  2006-02-06  added named route tables (andrei)
  47  *  2008-04-14  (expr1 != expr2) is evaluated true if at least one of
  48  *              the expressions does not exist (Miklos)
  49  *  2008-04-23  errors are treated as false during expression evaluation
  50  *              unless the operator is DIFF_OP (Miklos)
  51  *  2008-12-03  fixups for rvalues in assignments (andrei)
  52  *  2009-05-04  switched IF_T to rval_expr (andrei)
  53  */
  54
  55
  56 /*!
  57  * \file
  58  * \brief SIP-router core ::
  59  * \ingroup core
  60  * Module: \ref core
  61  */
  62
  63 #include <stdlib.h>
  64 #include <sys/types.h>
  65 #include <regex.h>
  66 #include <netdb.h>
  67 #include <string.h>
  68 #include <sys/socket.h>
  69 #include <netinet/in.h>
  70 #include <arpa/inet.h>
  71 #include <netdb.h>
  72
  73 #include "route.h"
  74 #include "forward.h"
  75 #include "dprint.h"
  76 #include "proxy.h"
  77 #include "action.h"
  78 #include "lvalue.h"
  79 #include "rvalue.h"
  80 #include "sr_module.h"
  81 #include "ip_addr.h"
  82 #include "resolve.h"
  83 #include "socket_info.h"
  84 #include "parser/parse_uri.h"
  85 #include "parser/parse_from.h"
  86 #include "parser/parse_to.h"
  87 #include "mem/mem.h"
  88 #include "select.h"
  89 #include "onsend.h"
  90 #include "str_hash.h"
  91 #include "ut.h"
  92 #include "rvalue.h"
  93 #include "switch.h"
  94
  95 #define RT_HASH_SIZE    8 /* route names hash */
  96
  97 /* main routing script table  */
  98 struct route_list main_rt;
  99 struct route_list onreply_rt;
 100 struct route_list failure_rt;
 101 struct route_list branch_rt;
 102 struct route_list onsend_rt;
 103 struct route_list event_rt;
 104
 105 int route_type = REQUEST_ROUTE;
 106
 107 /** script optimization level, useful for debugging.
 108  *  0 - no optimization
 109  *  1 - optimize rval expressions
 110  *  2 - optimize expr elems
 111  */
 112 int scr_opt_lev=9;
 113
 114 inline static void destroy_rlist(struct route_list* rt)
 115 {
 116         struct str_hash_entry* e;
 117         struct str_hash_entry* tmp;
 118
 119         if (rt->rlist){
 120                 pkg_free(rt->rlist);
 121                 rt->rlist=0;
 122                 rt->entries=0;
 123         }
 124         if (rt->names.table){
 125                 clist_foreach_safe(rt->names.table, e, tmp, next){
 126                         pkg_free(e);
 127                 }
 128                 pkg_free(rt->names.table);
 129                 rt->names.table=0;
 130                 rt->names.size=0;
 131         }
 132 }
 133
 134
 135
 136 void destroy_routes()
 137 {
 138         destroy_rlist(&main_rt);
 139         destroy_rlist(&onreply_rt);
 140         destroy_rlist(&failure_rt);
 141         destroy_rlist(&branch_rt);
 142         destroy_rlist(&event_rt);
 143 }
 144
 145
 146
 147 /* adds route name -> i mapping
 148  * WARNING: it doesn't check for pre-existing routes
 149  * return -1 on error, route index on success
 150  */
 151 static int route_add(struct route_list* rt, char* name, int i)
 152 {
 153         struct str_hash_entry* e;
 154
 155         e=pkg_malloc(sizeof(struct str_hash_entry));
 156         if (e==0){
 157                 LOG(L_CRIT, "ERROR: route_add: out of memory\n");
 158                 goto error;
 159         }
 160         e->key.s=name;
 161         e->key.len=strlen(name);
 162         e->flags=0;
 163         e->u.n=i;
 164         str_hash_add(&rt->names, e);
 165         return 0;
 166 error:
 167         return -1;
 168 }
 169
 170
 171
 172 /* returns -1 on error, 0 on success */
 173 inline  static int init_rlist(char* r_name, struct route_list* rt,
 174                                                                 int n_entries, int hash_size)
 175 {
 176                 rt->rlist=pkg_malloc(sizeof(struct action*)*n_entries);
 177                 if (rt->rlist==0){
 178                         LOG(L_CRIT, "ERROR: failed to allocate \"%s\" route tables: "
 179                                         "out of memory\n", r_name);
 180                         goto error;
 181                 }
 182                 memset(rt->rlist, 0 , sizeof(struct action*)*n_entries);
 183                 rt->idx=1; /* idx=0 == default == reserved */
 184                 rt->entries=n_entries;
 185                 if (str_hash_alloc(&rt->names, hash_size)<0){
 186                         LOG(L_CRIT, "ERROR: \"%s\" route table: failed to alloc hash\n",
 187                                         r_name);
 188                         goto error;
 189                 }
 190                 str_hash_init(&rt->names);
 191                 route_add(rt, "0", 0);  /* default route */
 192
 193                 return 0;
 194 error:
 195                 return -1;
 196 }
 197
 198
 199
 200 /* init route tables */
 201 int init_routes()
 202 {
 203         if (init_rlist("main", &main_rt, RT_NO, RT_HASH_SIZE)<0)
 204                 goto error;
 205         if (init_rlist("on_reply", &onreply_rt, ONREPLY_RT_NO, RT_HASH_SIZE)<0)
 206                 goto error;
 207         if (init_rlist("failure", &failure_rt, FAILURE_RT_NO, RT_HASH_SIZE)<0)
 208                 goto error;
 209         if (init_rlist("branch", &branch_rt, BRANCH_RT_NO, RT_HASH_SIZE)<0)
 210                 goto error;
 211         if (init_rlist("on_send", &onsend_rt, ONSEND_RT_NO, RT_HASH_SIZE)<0)
 212                 goto error;
 213         if (init_rlist("event", &event_rt, EVENT_RT_NO, RT_HASH_SIZE)<0)
 214                 goto error;
 215         return 0;
 216 error:
 217         destroy_routes();
 218         return -1;
 219 }
 220
 221
 222
 223 static inline int route_new_list(struct route_list* rt)
 224 {
 225         int ret;
 226         struct action** tmp;
 227
 228         ret=-1;
 229         if (rt->idx >= rt->entries){
 230                 tmp=pkg_realloc(rt->rlist, 2*rt->entries*sizeof(struct action*));
 231                 if (tmp==0){
 232                         LOG(L_CRIT, "ERROR: route_new_list: out of memory\n");
 233                         goto end;
 234                 }
 235                 /* init the newly allocated memory chunk */
 236                 memset(&tmp[rt->entries], 0, rt->entries*sizeof(struct action*));
 237                 rt->rlist=tmp;
 238                 rt->entries*=2;
 239         }
 240         if (rt->idx<rt->entries){
 241                 ret=rt->idx;
 242                 rt->idx++;
 243         }
 244 end:
 245         return ret;
 246 }
 247
 248
 249
 250
 251 /*
 252  * if the "name" route already exists, return its index, else
 253  * create a new empty route
 254  * return route index in rt->rlist or -1 on error
 255  */
 256 int route_get(struct route_list* rt, char* name)
 257 {
 258         int len;
 259         struct str_hash_entry* e;
 260         int i;
 261
 262         len=strlen(name);
 263         /* check if exists an non empty*/
 264         e=str_hash_get(&rt->names, name, len);
 265         if (e){
 266                 i=e->u.n;
 267         }else{
 268                 i=route_new_list(rt);
 269                 if (i==-1) goto error;
 270                 if (route_add(rt, name, i)<0){
 271                         goto error;
 272                 }
 273         }
 274         return i;
 275 error:
 276         return -1;
 277 }
 278
 279
 280
 281 /*
 282  * if the "name" route already exists, return its index, else
 283  * return error
 284  * return route index in rt->rlist or -1 on error
 285  */
 286 int route_lookup(struct route_list* rt, char* name)
 287 {
 288         int len;
 289         struct str_hash_entry* e;
 290
 291         len=strlen(name);
 292         /* check if exists an non empty*/
 293         e=str_hash_get(&rt->names, name, len);
 294         if (e){
 295                 return e->u.n;
 296         }else{
 297                 return -1;
 298         }
 299 }
 300
 301
 302
 303 int fix_actions(struct action* a); /*fwd declaration*/
 304
 305
 306 /** optimize the left side of a struct expr.
 307  *  @return 1 if optimized, 0 if not and -1 on error
 308  */
 309 static int exp_optimize_left(struct expr* exp)
 310 {
 311         struct rval_expr* rve;
 312         struct rvalue* rval;
 313         int old_ltype, old_rtype, old_op;
 314         int ret;
 315
 316         ret=0;
 317         if (exp->type!=ELEM_T)
 318                 return 0;
 319         old_ltype=exp->l_type;
 320         old_rtype=exp->r_type;
 321         old_op=exp->op;
 322         if (exp->l_type==RVEXP_O){
 323                 rve=exp->l.param;
 324                 /* rve should be previously fixed/optimized */
 325                 /* optimize exp (rval(val)) -> exp(val) */
 326                 if (rve->op==RVE_RVAL_OP){
 327                         rval=&rve->left.rval;
 328                         switch(rval->type){
 329                                 case RV_INT:
 330                                         if (exp->op==NO_OP){
 331                                                 exp->l_type=NUMBER_O;
 332                                                 exp->l.param=0;
 333                                                 exp->r_type=NUMBER_ST;
 334                                                 exp->r.numval=rval->v.l;
 335                                                 rval_destroy(rval);
 336                                                 pkg_free(rve);
 337                                                 ret=1;
 338                                         }
 339                                         break;
 340                                 case RV_STR:
 341                                         /* string evaluated in expression context - not
 342                                            supported */
 343                                         break;
 344                                 case RV_BEXPR:
 345                                         if (exp->op==NO_OP){
 346                                                 /* replace the current expr. */
 347                                                 *exp=*(rval->v.bexpr);
 348                                                 rval_destroy(rval);
 349                                                 pkg_free(rve);
 350                                                 ret=1;
 351                                         };
 352                                         break;
 353                                 case RV_ACTION_ST:
 354                                         if (exp->op==NO_OP){
 355                                                 exp->l_type=ACTION_O;
 356                                                 exp->l.param=0;
 357                                                 exp->r_type=ACTION_ST;
 358                                                 exp->r.param=rval->v.action;
 359                                                 rval_destroy(rval);
 360                                                 pkg_free(rve);
 361                                                 ret=1;
 362                                         }
 363                                         break;
 364                                 case RV_SEL:
 365                                         exp->l.select=pkg_malloc(sizeof(*exp->l.select));
 366                                         if (exp->l.select){
 367                                                 exp->l_type=SELECT_O;
 368                                                 *exp->l.select=rval->v.sel;
 369                                                 rval_destroy(rval);
 370                                                 pkg_free(rve);
 371                                                 ret=1;
 372                                         }else
 373                                                 ret=-1;
 374                                         break;
 375                                 case RV_AVP:
 376                                         exp->l.attr=pkg_malloc(sizeof(*exp->l.attr));
 377                                         if (exp->l.attr){
 378                                                 exp->l_type=AVP_O;
 379                                                 *exp->l.attr=rval->v.avps;
 380                                                 rval_destroy(rval);
 381                                                 pkg_free(rve);
 382                                                 ret=1;
 383                                         }else
 384                                                 ret=-1;
 385                                         break;
 386                                 case RV_PVAR:
 387                                         exp->l.param=pkg_malloc(sizeof(pv_spec_t));
 388                                         if (exp->l.param){
 389                                                 exp->l_type=PVAR_O;
 390                                                 *((pv_spec_t*)exp->l.param)=rval->v.pvs;
 391                                                 rval_destroy(rval);
 392                                                 pkg_free(rve);
 393                                                 ret=1;
 394                                         }else
 395                                                 ret=-1;
 396                                         break;
 397                                 case RV_NONE:
 398                                         break;
 399                         }
 400                 }
 401         }
 402         if (ret>0)
 403                 DBG("left EXP optimized: op%d(_O%d_, ST%d) => op%d(_O%d_, ST%d)\n",
 404                         old_op, old_ltype, old_rtype, exp->op, exp->l_type, exp->r_type);
 405         return ret;
 406 }
 407
 408
 409
 410 /** optimize the left side of a struct expr.
 411  *  @return 1 if optimized, 0 if not and -1 on error
 412  */
 413 static int exp_optimize_right(struct expr* exp)
 414 {
 415         struct rval_expr* rve;
 416         struct rvalue* rval;
 417         int old_ltype, old_rtype, old_op;
 418         int ret;
 419
 420         ret=0;
 421         if ((exp->type!=ELEM_T) ||(exp->op==NO_OP))
 422                 return 0;
 423         old_ltype=exp->l_type;
 424         old_rtype=exp->r_type;
 425         old_op=exp->op;
 426         if (exp->r_type==RVE_ST){
 427                 rve=exp->r.param;
 428                 /* rve should be previously fixed/optimized */
 429                 /* optimize exp (rval(val)) -> exp(val) */
 430                 if (rve->op==RVE_RVAL_OP){
 431                         rval=&rve->left.rval;
 432                         switch(rval->type){
 433                                 case RV_INT:
 434                                         exp->r_type=NUMBER_ST;
 435                                         exp->r.numval=rval->v.l;
 436                                         rval_destroy(rval);
 437                                         pkg_free(rve);
 438                                         ret=1;
 439                                         break;
 440                                 case RV_STR:
 441                                         exp->r.str.s=pkg_malloc(rval->v.s.len+1);
 442                                         if (exp->r.str.s){
 443                                                 exp->r.str.len=rval->v.s.len;
 444                                                 memcpy(exp->r.str.s, rval->v.s.s, rval->v.s.len);
 445                                                 exp->r.str.s[exp->r.str.len]=0;
 446                                                 exp->r_type=STRING_ST;
 447                                                 rval_destroy(rval);
 448                                                 pkg_free(rve);
 449                                                 ret=1;
 450                                         }else
 451                                                 ret=-1;
 452                                         break;
 453                                 case RV_BEXPR:
 454                                         /* cannot be optimized further, is an exp_elem
 455                                            which is not constant */
 456                                         break;
 457                                 case RV_ACTION_ST:
 458                                         /* cannot be optimized further, is not constant and
 459                                           eval_elem() does not support ACTION_ST for op!=NO_OP*/
 460                                         break;
 461                                 case RV_SEL:
 462                                         exp->r.select=pkg_malloc(sizeof(*exp->l.select));
 463                                         if (exp->r.select){
 464                                                 exp->r_type=SELECT_ST;
 465                                                 *exp->r.select=rval->v.sel;
 466                                                 rval_destroy(rval);
 467                                                 pkg_free(rve);
 468                                                 ret=1;
 469                                         }else
 470                                                 ret=-1;
 471                                         break;
 472                                 case RV_AVP:
 473                                         exp->r.attr=pkg_malloc(sizeof(*exp->l.attr));
 474                                         if (exp->r.attr){
 475                                                 exp->r_type=AVP_ST;
 476                                                 *exp->r.attr=rval->v.avps;
 477                                                 rval_destroy(rval);
 478                                                 pkg_free(rve);
 479                                                 ret=1;
 480                                         }else
 481                                                 ret=-1;
 482                                         break;
 483                                 case RV_PVAR:
 484                                         exp->r.param=pkg_malloc(sizeof(pv_spec_t));
 485                                         if (exp->r.param){
 486                                                 exp->r_type=PVAR_ST;
 487                                                 *((pv_spec_t*)exp->r.param)=rval->v.pvs;
 488                                                 rval_destroy(rval);
 489                                                 pkg_free(rve);
 490                                                 ret=1;
 491                                         }else
 492                                                 ret=-1;
 493                                         break;
 494                                 case RV_NONE:
 495                                         ret=-1;
 496                                         break;
 497                         }
 498                 }
 499         }
 500         if (ret>0)
 501                 DBG("right EXP optimized: op%d(O%d, _ST%d_) => op%d(O%d, _ST%d_)\n",
 502                         old_op, old_ltype, old_rtype, exp->op, exp->l_type, exp->r_type);
 503         return ret;
 504 }
 505
 506
 507
 508 /* traverses an expr tree and compiles the REs where necessary)
 509  * returns: 0 for ok, <0 if errors */
 510 int fix_expr(struct expr* exp)
 511 {
 512         regex_t* re;
 513         int ret;
 514         int len;
 515
 516         ret=E_BUG;
 517         if (exp==0){
 518                 LOG(L_CRIT, "BUG: fix_expr: null pointer\n");
 519                 return E_BUG;
 520         }
 521         if (exp->type==EXP_T){
 522                 switch(exp->op){
 523                         case LOGAND_OP:
 524                         case LOGOR_OP:
 525                                                 if ((ret=fix_expr(exp->l.expr))!=0)
 526                                                         return ret;
 527                                                 ret=fix_expr(exp->r.expr);
 528                                                 break;
 529                         case NOT_OP:
 530                                                 ret=fix_expr(exp->l.expr);
 531                                                 break;
 532                         default:
 533                                                 LOG(L_CRIT, "BUG: fix_expr: unknown op %d\n",
 534                                                                 exp->op);
 535                 }
 536         }else if (exp->type==ELEM_T){
 537                         /* first calculate lengths of strings  (only right side, since
 538                           left side can never be a string) */
 539                         if (exp->r_type==STRING_ST) {
 540                                 if (exp->r.string) len = strlen(exp->r.string);
 541                                 else len = 0;
 542                                 exp->r.str.s = exp->r.string;
 543                                 exp->r.str.len = len;
 544                         }
 545                         /* then fix & optimize rve/rvals (they might be optimized
 546                            to non-rvals, e.g. string, avp a.s.o and needs to be done
 547                            before MATCH_OP and other fixups) */
 548                         if (exp->l_type==RVEXP_O){
 549                                 if ((ret=fix_rval_expr(&exp->l.param))<0){
 550                                         ERR("Unable to fix left rval expression\n");
 551                                         return ret;
 552                                 }
 553                                 if (scr_opt_lev>=2)
 554                                         exp_optimize_left(exp);
 555                         }
 556                         if (exp->r_type==RVE_ST){
 557                                 if ((ret=fix_rval_expr(&exp->r.param))<0){
 558                                         ERR("Unable to fix right rval expression\n");
 559                                         return ret;
 560                                 }
 561                                 if (scr_opt_lev>=2)
 562                                         exp_optimize_right(exp);
 563                         }
 564
 565
 566                         if (exp->op==MATCH_OP){
 567                                      /* right side either has to be string, in which case
 568                                       * we turn it into regular expression, or it is regular
 569                                       * expression already. In that case we do nothing
 570                                       */
 571                                 if (exp->r_type==STRING_ST){
 572                                         re=(regex_t*)pkg_malloc(sizeof(regex_t));
 573                                         if (re==0){
 574                                                 LOG(L_CRIT, "ERROR: fix_expr: memory allocation"
 575                                                                 " failure\n");
 576                                                 return E_OUT_OF_MEM;
 577                                         }
 578                                         if (regcomp(re, (char*) exp->r.param,
 579                                                                 REG_EXTENDED|REG_NOSUB|REG_ICASE) ){
 580                                                 LOG(L_CRIT, "ERROR: fix_expr : bad re \"%s\"\n",
 581                                                                         (char*) exp->r.param);
 582                                                 pkg_free(re);
 583                                                 return E_BAD_RE;
 584                                         }
 585                                         /* replace the string with the re */
 586                                         pkg_free(exp->r.param);
 587                                         exp->r.re=re;
 588                                         exp->r_type=RE_ST;
 589                                 }else if (exp->r_type!=RE_ST && exp->r_type != AVP_ST
 590                                                 && exp->r_type != SELECT_ST && exp->r_type!= RVE_ST
 591                                                 && exp->r_type != PVAR_ST){
 592                                         LOG(L_CRIT, "BUG: fix_expr : invalid type for match\n");
 593                                         return E_BUG;
 594                                 }
 595                         }
 596                         if (exp->l_type==ACTION_O){
 597                                 ret=fix_actions((struct action*)exp->r.param);
 598                                 if (ret!=0){
 599                                         LOG(L_CRIT, "ERROR: fix_expr : fix_actions error\n");
 600                                         return ret;
 601                                 }
 602                         }
 603                         if (exp->l_type==SELECT_O) {
 604                                 if ((ret=resolve_select(exp->l.select)) < 0) {
 605                                         BUG("Unable to resolve select\n");
 606                                         print_select(exp->l.select);
 607                                         return ret;
 608                                 }
 609                         }
 610                         if ((exp->r_type==SELECT_O)||(exp->r_type==SELECT_ST)) {
 611                                 if ((ret=resolve_select(exp->r.select)) < 0) {
 612                                         BUG("Unable to resolve select\n");
 613                                         print_select(exp->l.select);
 614                                         return ret;
 615                                 }
 616                         }
 617                         /* PVAR don't need fixing */
 618                         ret=0;
 619         }
 620         return ret;
 621 }
 622
 623
 624
 625 /* adds the proxies in the proxy list & resolves the hostnames */
 626 /* returns 0 if ok, <0 on error */
 627 int fix_actions(struct action* a)
 628 {
 629         struct action *t;
 630         struct proxy_l* p;
 631         char *tmp;
 632         void *tmp_p;
 633         int ret;
 634         int i;
 635         union cmd_export_u* cmd;
 636         str s;
 637         struct hostent* he;
 638         struct ip_addr ip;
 639         struct socket_info* si;
 640         struct lvalue* lval;
 641         struct rval_expr* rve;
 642         struct rval_expr* err_rve;
 643         enum rval_type rve_type, err_type, expected_type;
 644         struct rvalue* rv;
 645         int rve_param_no;
 646
 647
 648         char buf[30]; /* tmp buffer needed for module param fixups */
 649
 650         if (a==0){
 651                 LOG(L_CRIT,"BUG: fix_actions: null pointer\n");
 652                 return E_BUG;
 653         }
 654         for(t=a; t!=0; t=t->next){
 655                 switch(t->type){
 656                         case FORWARD_T:
 657                         case FORWARD_TLS_T:
 658                         case FORWARD_TCP_T:
 659                         case FORWARD_SCTP_T:
 660                         case FORWARD_UDP_T:
 661                         case SEND_T:
 662                         case SEND_TCP_T:
 663                                         switch(t->val[0].type){
 664                                                 case IP_ST:
 665                                                         tmp=strdup(ip_addr2a(
 666                                                                                 (struct ip_addr*)t->val[0].u.data));
 667                                                         if (tmp==0){
 668                                                                 LOG(L_CRIT, "ERROR: fix_actions:"
 669                                                                                 "memory allocation failure\n");
 670                                                                 ret = E_OUT_OF_MEM;
 671                                                                 goto error;
 672                                                         }
 673                                                         t->val[0].type=STRING_ST;
 674                                                         t->val[0].u.string=tmp;
 675                                                         /* no break */
 676                                                 case STRING_ST:
 677                                                         s.s = t->val[0].u.string;
 678                                                         s.len = strlen(s.s);
 679                                                         p=add_proxy(&s, t->val[1].u.number, 0); /* FIXME proto*/
 680                                                         if (p==0) { ret =E_BAD_ADDRESS; goto error; }
 681                                                         t->val[0].u.data=p;
 682                                                         t->val[0].type=PROXY_ST;
 683                                                         break;
 684                                                 case URIHOST_ST:
 685                                                         break;
 686                                                 default:
 687                                                         LOG(L_CRIT, "BUG: fix_actions: invalid type"
 688                                                                         "%d (should be string or number)\n",
 689                                                                                 t->type);
 690                                                         ret = E_BUG;
 691                                                         goto error;
 692                                         }
 693                                         break;
 694                         case IF_T:
 695                                 if (t->val[0].type!=RVE_ST){
 696                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
 697                                                                 "%d for if (should be rval expr)\n",
 698                                                                 t->val[0].type);
 699                                         ret = E_BUG;
 700                                         goto error;
 701                                 }else if( (t->val[1].type!=ACTIONS_ST) &&
 702                                                         (t->val[1].type!=NOSUBTYPE) ){
 703                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
 704                                                                 "%d for if() {...} (should be action)\n",
 705                                                                 t->val[1].type);
 706                                         ret = E_BUG;
 707                                         goto error;
 708                                 }else if( (t->val[2].type!=ACTIONS_ST) &&
 709                                                         (t->val[2].type!=NOSUBTYPE) ){
 710                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
 711                                                                 "%d for if() {} else{...}(should be action)\n",
 712                                                                 t->val[2].type);
 713                                         ret = E_BUG;
 714                                         goto error;
 715                                 }
 716                                 rve=(struct rval_expr*)t->val[0].u.data;
 717                                 if (rve){
 718                                         err_rve=0;
 719                                         if (!rve_check_type(&rve_type, rve, &err_rve,
 720                                                                                         &err_type, &expected_type)){
 721                                                 if (err_rve)
 722                                                         LOG(L_ERR, "fix_actions: invalid expression "
 723                                                                         "(%d,%d): subexpression (%d,%d) has type"
 724                                                                         " %s,  but %s is expected\n",
 725                                                                         rve->fpos.s_line, rve->fpos.s_col,
 726                                                                         err_rve->fpos.s_line, err_rve->fpos.s_col,
 727                                                                         rval_type_name(err_type),
 728                                                                         rval_type_name(expected_type) );
 729                                                 else
 730                                                         LOG(L_ERR, "fix_actions: invalid expression "
 731                                                                         "(%d,%d): type mismatch?",
 732                                                                         rve->fpos.s_line, rve->fpos.s_col);
 733                                                 ret = E_UNSPEC;
 734                                                 goto error;
 735                                         }
 736                                         /* it's not an error anymore to have non-int in an if,
 737                                            only a script warning (to allow backward compat. stuff
 738                                            like if (@ruri)
 739                                         if (rve_type!=RV_INT && rve_type!=RV_NONE){
 740                                                 LOG(L_ERR, "fix_actions: invalid expression (%d,%d):"
 741                                                                 " bad type, integer expected\n",
 742                                                                 rve->fpos.s_line, rve->fpos.s_col);
 743                                                 return E_UNSPEC;
 744                                         }
 745                                         */
 746                                         if ((ret=fix_rval_expr(&t->val[0].u.data))<0)
 747                                                 goto error;
 748                                 }
 749                                 if ( (t->val[1].type==ACTIONS_ST)&&(t->val[1].u.data) ){
 750                                         if ((ret=fix_actions((struct action*)t->val[1].u.data))<0)
 751                                                 goto error;
 752                                 }
 753                                 if ( (t->val[2].type==ACTIONS_ST)&&(t->val[2].u.data) ){
 754                                                 if ((ret=fix_actions((struct action*)t->val[2].u.data))
 755                                                                 <0)
 756                                                 goto error;
 757                                 }
 758                                 break;
 759                         case SWITCH_T:
 760                                 if (t->val[0].type!=RVE_ST){
 761                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
 762                                                                 "%d for switch() (should be expr)\n",
 763                                                                 t->val[0].type);
 764                                         ret = E_BUG;
 765                                         goto error;
 766                                 }else if (t->val[1].type!=CASE_ST){
 767                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
 768                                                                 "%d for switch(...){...}(should be case)\n",
 769                                                                 t->val[1].type);
 770                                         ret = E_BUG;
 771                                         goto error;
 772                                 }
 773                                 if (t->val[0].u.data){
 774                                         if ((ret=fix_rval_expr(&t->val[0].u.data))<0)
 775                                                 goto error;
 776                                 }else{
 777                                         LOG(L_CRIT, "BUG: fix_actions: null switch()"
 778                                                         " expression\n");
 779                                         ret = E_BUG;
 780                                         goto error;
 781                                 }
 782                                 if ((ret=fix_switch(t))<0)
 783                                         goto error;
 784                                 break;
 785                         case WHILE_T:
 786                                 if (t->val[0].type!=RVE_ST){
 787                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
 788                                                                 "%d for while() (should be expr)\n",
 789                                                                 t->val[0].type);
 790                                         ret = E_BUG;
 791                                         goto error;
 792                                 }else if (t->val[1].type!=ACTIONS_ST){
 793                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
 794                                                                 "%d for while(...){...}(should be action)\n",
 795                                                                 t->val[1].type);
 796                                         ret = E_BUG;
 797                                         goto error;
 798                                 }
 799                                 rve=(struct rval_expr*)t->val[0].u.data;
 800                                 if (rve){
 801                                         err_rve=0;
 802                                         if (!rve_check_type(&rve_type, rve, &err_rve,
 803                                                                                         &err_type, &expected_type)){
 804                                                 if (err_rve)
 805                                                         LOG(L_ERR, "fix_actions: invalid expression "
 806                                                                         "(%d,%d): subexpression (%d,%d) has type"
 807                                                                         " %s,  but %s is expected\n",
 808                                                                         rve->fpos.s_line, rve->fpos.s_col,
 809                                                                         err_rve->fpos.s_line, err_rve->fpos.s_col,
 810                                                                         rval_type_name(err_type),
 811                                                                         rval_type_name(expected_type) );
 812                                                 else
 813                                                         LOG(L_ERR, "fix_actions: invalid expression "
 814                                                                         "(%d,%d): type mismatch?",
 815                                                                         rve->fpos.s_line, rve->fpos.s_col);
 816                                                 ret = E_UNSPEC;
 817                                                 goto error;
 818                                         }
 819                                         if (rve_type!=RV_INT && rve_type!=RV_NONE){
 820                                                 LOG(L_ERR, "fix_actions: invalid expression (%d,%d):"
 821                                                                 " bad type, integer expected\n",
 822                                                                 rve->fpos.s_line, rve->fpos.s_col);
 823                                                 ret = E_UNSPEC;
 824                                                 goto error;
 825                                         }
 826                                         if ((ret=fix_rval_expr(&t->val[0].u.data))<0)
 827                                                 goto error;
 828                                 }else{
 829                                         LOG(L_CRIT, "BUG: fix_actions: null while()"
 830                                                         " expression\n");
 831                                         ret = E_BUG;
 832                                         goto error;
 833                                 }
 834                                 if ( t->val[1].u.data &&
 835                                         ((ret= fix_actions((struct action*)t->val[1].u.data))<0)){
 836                                         goto error;
 837                                 }
 838                                 break;
 839                         case DROP_T:
 840                                 /* only RVEs need fixing for drop/return/break */
 841                                 if (t->val[0].type!=RVE_ST)
 842                                         break;
 843                                 rve=(struct rval_expr*)t->val[0].u.data;
 844                                 if (rve){
 845                                         err_rve=0;
 846                                         if (!rve_check_type(&rve_type, rve, &err_rve,
 847                                                                                         &err_type, &expected_type)){
 848                                                 if (err_rve)
 849                                                         LOG(L_ERR, "fix_actions: invalid expression "
 850                                                                         "(%d,%d): subexpression (%d,%d) has type"
 851                                                                         " %s,  but %s is expected\n",
 852                                                                         rve->fpos.s_line, rve->fpos.s_col,
 853                                                                         err_rve->fpos.s_line, err_rve->fpos.s_col,
 854                                                                         rval_type_name(err_type),
 855                                                                         rval_type_name(expected_type) );
 856                                                 else
 857                                                         LOG(L_ERR, "fix_actions: invalid expression "
 858                                                                         "(%d,%d): type mismatch?",
 859                                                                         rve->fpos.s_line, rve->fpos.s_col);
 860                                                 ret = E_UNSPEC;
 861                                                 goto error;
 862                                         }
 863                                         if (rve_type!=RV_INT && rve_type!=RV_NONE){
 864                                                 LOG(L_ERR, "fix_actions: invalid expression (%d,%d):"
 865                                                                 " bad type, integer expected\n",
 866                                                                 rve->fpos.s_line, rve->fpos.s_col);
 867                                                 ret = E_UNSPEC;
 868                                                 goto error;
 869                                         }
 870                                         if ((ret=fix_rval_expr(&t->val[0].u.data))<0)
 871                                                 goto error;
 872                                 }else{
 873                                         LOG(L_CRIT, "BUG: fix_actions: null drop/return"
 874                                                         " expression\n");
 875                                         ret = E_BUG;
 876                                         goto error;
 877                                 }
 878                                 break;
 879                         case ASSIGN_T:
 880                         case ADD_T:
 881                                 if (t->val[0].type !=LVAL_ST) {
 882                                         LOG(L_CRIT, "BUG: fix_actions: Invalid left side of"
 883                                                                 " assignment\n");
 884                                         ret = E_BUG;
 885                                         goto error;
 886                                 }
 887                                 if (t->val[1].type !=RVE_ST) {
 888                                         LOG(L_CRIT, "BUG: fix_actions: Invalid right side of"
 889                                                                 " assignment (%d)\n", t->val[1].type);
 890                                         ret = E_BUG;
 891                                         goto error;
 892                                 }
 893                                 lval=t->val[0].u.data;
 894                                 if (lval->type==LV_AVP){
 895                                         if (lval->lv.avps.type & AVP_CLASS_DOMAIN) {
 896                                                 LOG(L_ERR, "ERROR: You cannot change domain"
 897                                                                         " attributes from the script, they are"
 898                                                                         " read-only\n");
 899                                                 ret = E_BUG;
 900                                                 goto error;
 901                                         } else if (lval->lv.avps.type & AVP_CLASS_GLOBAL) {
 902                                                 LOG(L_ERR, "ERROR: You cannot change global"
 903                                                                    " attributes from the script, they are"
 904                                                                    "read-only\n");
 905                                                 ret = E_BUG;
 906                                                 goto error;
 907                                         }
 908                                 }
 909                                 if ((ret=fix_rval_expr(&t->val[1].u.data))<0)
 910                                         goto error;
 911                                 break;
 912
 913                         case MODULE0_T:
 914                         case MODULE1_T:
 915                         case MODULE2_T:
 916                         case MODULE3_T:
 917                         case MODULE4_T:
 918                         case MODULE5_T:
 919                         case MODULE6_T:
 920                         case MODULEX_T:
 921                                 cmd = t->val[0].u.data;
 922                                 rve_param_no = 0;
 923                                 if (cmd && cmd->c.fixup) {
 924                                         DBG("fixing %s()\n", cmd->c.name);
 925                                         if (t->val[1].u.number==0) {
 926                                                 ret = cmd->c.fixup(0, 0);
 927                                                 if (ret < 0)
 928                                                         goto error;
 929                                         }
 930                                         /* type cast NUMBER to STRING, old modules may expect
 931                                          * all STRING params during fixup */
 932                                         for (i=0; i<t->val[1].u.number; i++) {
 933                                                 /* obsoleted by the new RVE changes ? */
 934                                                 if (t->val[i+2].type == NUMBER_ST) {
 935                                                         snprintf(buf, sizeof(buf)-1, "%ld",
 936                                                                                 t->val[i+2].u.number);
 937                                                         /* fixup currently requires string pkg_malloced*/
 938                                                         t->val[i+2].u.string = pkg_malloc(strlen(buf)+1);
 939                                                         if (!t->val[i+2].u.string) {
 940                                                                 LOG(L_CRIT, "ERROR: cannot translate NUMBER"
 941                                                                                         " to STRING\n");
 942                                                                 ret = E_OUT_OF_MEM;
 943                                                                 goto error;
 944                                                         }
 945                                                         strcpy(t->val[i+2].u.string, buf);
 946                                                         t->val[i+2].type = STRING_ST;
 947                                                 }else if (t->val[i+2].type != STRING_ST) {
 948                                                         BUG("unsupported function parameter type %d\n",
 949                                                                         t->val[i+2].type);
 950                                                 }
 951                                         }
 952                                         for (i=0; i < t->val[1].u.number; i++) {
 953                                                 tmp_p = t->val[i+2].u.data;
 954                                                 ret = cmd->c.fixup(&t->val[i+2].u.data, i+1);
 955                                                 if (t->val[i+2].u.data != tmp_p)
 956                                                         t->val[i+2].type = MODFIXUP_ST;
 957                                                 if (ret < 0)
 958                                                         goto error;
 959                                         }
 960                                 } else if (cmd) { /* no fixup => RVE supported => optimize */
 961                                         for (i=0; i < t->val[1].u.number; i++) {
 962                                                 if (t->val[i+2].type == RVE_ST) {
 963                                                         rve = t->val[i+2].u.data;
 964                                                         if (rve_is_constant(rve)) {
 965                                                                 /* if expression is constant => evaluate it
 966                                                                    as string and replace it with the corresp.
 967                                                                    string */
 968                                                                 rv = rval_expr_eval(0, 0, rve);
 969                                                                 if (rv == 0 ||
 970                                                                                 rval_get_str( 0, 0, &s, rv, 0) < 0 ) {
 971                                                                         ERR("failed to fix constant rve");
 972                                                                         if (rv) rval_destroy(rv);
 973                                                                         ret = E_BUG;
 974                                                                         goto error;
 975                                                                 }
 976                                                                 rval_destroy(rv);
 977                                                                 rve_destroy(rve);
 978                                                                 t->val[i+2].type = STRING_ST;/*asciiz string*/
 979                                                                 t->val[i+2].u.string = s.s;
 980                                                                 /* len is not used for now */
 981                                                                 t->val[i+2].u.str.len = s.len;
 982                                                         } else {
 983                                                                 /* expression is not constant => fixup &
 984                                                                    optimize it */
 985                                                                 rve_param_no++;
 986                                                                 if ((ret=fix_rval_expr(&t->val[i+2].u.data))
 987                                                                                 < 0) {
 988                                                                         ERR("rve fixup failed\n");
 989                                                                         ret = E_BUG;
 990                                                                         goto error;
 991                                                                 }
 992                                                         }
 993                                                 } /* if RVE_ST */
 994                                         }
 995                                         if (rve_param_no) { /* we have to fix the type */
 996                                                 switch(t->type) {
 997                                                         case MODULE1_T:
 998                                                                 t->type = MODULE1_RVE_T;
 999                                                                 break;
1000                                                         case MODULE2_T:
1001                                                                 t->type = MODULE2_RVE_T;
1002                                                                 break;
1003                                                         case MODULE3_T:
1004                                                                 t->type = MODULE3_RVE_T;
1005                                                                 break;
1006                                                         case MODULE4_T:
1007                                                                 t->type = MODULE4_RVE_T;
1008                                                                 break;
1009                                                         case MODULE5_T:
1010                                                                 t->type = MODULE5_RVE_T;
1011                                                                 break;
1012                                                         case MODULE6_T:
1013                                                                 t->type = MODULE6_RVE_T;
1014                                                                 break;
1015                                                         case MODULEX_T:
1016                                                                 t->type = MODULEX_RVE_T;
1017                                                                 break;
1018                                                         default:
1019                                                                 BUG("unsupported module function type %d\n",
1020                                                                                 t->type);
1021                                                                 ret = E_BUG;
1022                                                                 goto error;
1023                                                 }
1024                                         } /* if rve_param_no */
1025                                 }
1026                                 break;
1027                         case FORCE_SEND_SOCKET_T:
1028                                 if (t->val[0].type!=SOCKID_ST){
1029                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
1030                                                                 "%d for force_send_socket\n",
1031                                                                 t->val[0].type);
1032                                         ret = E_BUG;
1033                                         goto error;
1034                                 }
1035                                 he=resolvehost(
1036                                                 ((struct socket_id*)t->val[0].u.data)->addr_lst->name
1037                                                 );
1038                                 if (he==0){
1039                                         LOG(L_ERR, "ERROR: fix_actions: force_send_socket:"
1040                                                                 " could not resolve %s\n",
1041                                                 ((struct socket_id*)t->val[0].u.data)->addr_lst->name);
1042                                         ret = E_BAD_ADDRESS;
1043                                         goto error;
1044                                 }
1045                                 hostent2ip_addr(&ip, he, 0);
1046                                 si=find_si(&ip, ((struct socket_id*)t->val[0].u.data)->port,
1047                                                                 ((struct socket_id*)t->val[0].u.data)->proto);
1048                                 if (si==0){
1049                                         LOG(L_ERR, "ERROR: fix_actions: bad force_send_socket"
1050                                                         " argument: %s:%d (ser doesn't listen on it)\n",
1051                                                 ((struct socket_id*)t->val[0].u.data)->addr_lst->name,
1052                                                         ((struct socket_id*)t->val[0].u.data)->port);
1053                                         ret = E_BAD_ADDRESS;
1054                                         goto error;
1055                                 }
1056                                 t->val[0].u.data=si;
1057                                 t->val[0].type=SOCKETINFO_ST;
1058                                 break;
1059                         case UDP_MTU_TRY_PROTO_T:
1060                                 if (t->val[0].type!=NUMBER_ST){
1061                                         LOG(L_CRIT, "BUG: fix_actions: invalid subtype"
1062                                                                 "%d for udp_mtu_try_proto\n",
1063                                                                 t->val[0].type);
1064                                         ret = E_BUG;
1065                                         goto error;
1066                                 }
1067                                 switch(t->val[0].u.number){
1068                                         case PROTO_UDP:
1069                                                 t->val[0].u.number=0;
1070                                                 break;
1071                                         case PROTO_TCP:
1072                                                 t->val[0].u.number=FL_MTU_TCP_FB;
1073                                                 break;
1074                                         case PROTO_TLS:
1075                                                 t->val[0].u.number=FL_MTU_TLS_FB;
1076                                                 break;
1077                                         case PROTO_SCTP:
1078                                                 t->val[0].u.number=FL_MTU_SCTP_FB;
1079                                                 break;
1080                                         default:
1081                                                 LOG(L_CRIT, "BUG: fix actions: invalid argument for"
1082                                                                         " udp_mtu_try_proto (%d)\n",
1083                                                                         (unsigned int)t->val[0].u.number);
1084                                 }
1085                                 break;
1086                         case APPEND_BRANCH_T:
1087                                 if (t->val[0].type!=STRING_ST){
1088                                         BUG("invalid subtype%d for append_branch_t\n",
1089                                                                 t->val[0].type);
1090                                         ret = E_BUG;
1091                                         goto error;
1092                                 }
1093                                 s.s=t->val[0].u.string;
1094                                 s.len=(s.s)?strlen(s.s):0;
1095                                 t->val[0].u.str=s;
1096                                 t->val[0].type=STR_ST;
1097                                 break;
1098                         default:
1099                                 /* no fixup required for the rest */
1100                                 break;
1101                 }
1102         }
1103         return 0;
1104
1105 error:
1106         LM_ERR("fixing failed (code=%d) at cfg:%s:%d\n", ret,
1107                         (t->cfile)?t->cfile:"", t->cline);
1108         return ret;
1109 }
1110
1111
1112 /* Compare parameters as ordinary numbers
1113  *
1114  * Left and right operands can be either numbers or
1115  * attributes. If either of the attributes if of string type then the length of
1116  * its value will be used.
1117  */
1118 inline static int comp_num(int op, long left, int rtype, union exp_op* r,
1119                                                         struct sip_msg* msg, struct run_act_ctx* h)
1120 {
1121         int_str val;
1122         pv_value_t pval;
1123         avp_t* avp;
1124         int right;
1125
1126         if (unlikely(op==NO_OP)) return !(!left);
1127         switch(rtype){
1128                 case AVP_ST:
1129                         avp = search_avp_by_index(r->attr->type, r->attr->name,
1130                                                                                 &val, r->attr->index);
1131                         if (avp && !(avp->flags & AVP_VAL_STR)) right = val.n;
1132                         else return (op == DIFF_OP);
1133                         break;
1134                 case NUMBER_ST:
1135                         right = r->numval;
1136                         break;
1137                 case RVE_ST:
1138                         if (unlikely(rval_expr_eval_int(h, msg, &right, r->param)<0))
1139                                 return (op == DIFF_OP); /* not found/invalid */
1140                         break;
1141                 case PVAR_ST:
1142                         memset(&pval, 0, sizeof(pv_value_t));
1143                         if (unlikely(pv_get_spec_value(msg, r->param, &pval)!=0)){
1144                                 return (op == DIFF_OP); /* error, not found => false */
1145                         }
1146                         if (likely(pval.flags & (PV_TYPE_INT|PV_VAL_INT))){
1147                                 right=pval.ri;
1148                                 pv_value_destroy(&pval);
1149                         }else{
1150                                 pv_value_destroy(&pval);
1151                                 return (op == DIFF_OP); /* not found or invalid type */
1152                         }
1153                         break;
1154                 default:
1155                         LOG(L_CRIT, "BUG: comp_num: Invalid right operand (%d)\n", rtype);
1156                         return E_BUG;
1157         }
1158
1159         switch (op){
1160                 case EQUAL_OP: return (long)left == (long)right;
1161                 case DIFF_OP:  return (long)left != (long)right;
1162                 case GT_OP:    return (long)left >  (long)right;
1163                 case LT_OP:    return (long)left <  (long)right;
1164                 case GTE_OP:   return (long)left >= (long)right;
1165                 case LTE_OP:   return (long)left <= (long)right;
1166                 default:
1167                         LOG(L_CRIT, "BUG: comp_num: unknown operator: %d\n", op);
1168                         return E_BUG;
1169         }
1170         return E_BUG;
1171 }
1172
1173 /*
1174  * Compare given string "left" with right side of expression
1175  */
1176 inline static int comp_str(int op, str* left, int rtype,
1177                                                         union exp_op* r, struct sip_msg* msg,
1178                                                         struct run_act_ctx* h)
1179 {
1180         str* right;
1181         int_str val;
1182         str v;
1183         avp_t* avp;
1184         int ret;
1185         char backup;
1186         regex_t* re;
1187         unsigned int l;
1188         struct rvalue* rv;
1189         struct rval_cache rv_cache;
1190         pv_value_t pval;
1191         int destroy_pval;
1192
1193         right=0; /* warning fix */
1194         rv=0;
1195         destroy_pval=0;
1196         if (unlikely(op==NO_OP)) return (left->s!=0);
1197         switch(rtype){
1198                 case AVP_ST:
1199                         avp = search_avp_by_index(r->attr->type, r->attr->name,
1200                                                                                 &val, r->attr->index);
1201                         if (likely(avp && (avp->flags & AVP_VAL_STR))) right = &val.s;
1202                         else return (op == DIFF_OP);
1203                         break;
1204                 case SELECT_ST:
1205                         ret = run_select(&v, r->select, msg);
1206                         if (unlikely(ret != 0))
1207                                 return (op == DIFF_OP); /* Not found or error */
1208                         right = &v;
1209                         break;
1210                 case RVE_ST:
1211                         rval_cache_init(&rv_cache);
1212                         rv=rval_expr_eval(h, msg, r->param);
1213                         if (unlikely (rv==0))
1214                                 return (op==DIFF_OP); /* not found or error*/
1215                         if (unlikely(rval_get_tmp_str(h, msg, &v, rv, 0, &rv_cache)<0)){
1216                                 goto error;
1217                         }
1218                         right = &v;
1219                         break;
1220                 case PVAR_ST:
1221                         memset(&pval, 0, sizeof(pv_value_t));
1222                         if (unlikely(pv_get_spec_value(msg, r->param, &pval)!=0)){
1223                                 return (op == DIFF_OP); /* error, not found => false */
1224                         }
1225                         destroy_pval=1;
1226                         if (likely(pval.flags & PV_VAL_STR)){
1227                                 right=&pval.rs;
1228                         }else{
1229                                 pv_value_destroy(&pval);
1230                                 return (op == DIFF_OP); /* not found or invalid type */
1231                         }
1232                         break;
1233                 case RE_ST:
1234                         if (unlikely(op != MATCH_OP)){
1235                                 LOG(L_CRIT, "BUG: comp_str: Bad operator %d,"
1236                                                         " ~= expected\n", op);
1237                                 goto error;
1238                         }
1239                         break;
1240                 case STRING_ST:
1241                         right=&r->str;
1242                         break;
1243                 case NUMBER_ST:
1244                         /* "123" > 100 is not allowed by cfg.y rules
1245                          * but can happen as @select or $avp evaluation
1246                          * $test > 10
1247                          * the right operator MUST be number to do the conversion
1248                          */
1249                         if (str2int(left,&l) < 0)
1250                                 goto error;
1251                         return comp_num(op, l, rtype, r, msg, h);
1252                 default:
1253                         LOG(L_CRIT, "BUG: comp_str: Bad type %d, "
1254                                                 "string or RE expected\n", rtype);
1255                         goto error;
1256         }
1257
1258         ret=-1;
1259         switch(op){
1260                 case EQUAL_OP:
1261                         if (left->len != right->len) return 0;
1262                         ret=(strncasecmp(left->s, right->s, left->len)==0);
1263                         break;
1264                 case DIFF_OP:
1265                         if (left->len != right->len) return 1;
1266                         ret = (strncasecmp(left->s, right->s, left->len)!=0);
1267                         break;
1268                 case MATCH_OP:
1269                         /* this is really ugly -- we put a temporary zero-terminating
1270                          * character in the original string; that's because regexps
1271                          * take 0-terminated strings and our messages are not
1272                          * zero-terminated; it should not hurt as long as this function
1273                          * is applied to content of pkg mem, which is always the case
1274                          * with calls from route{}; the same goes for fline in
1275                          * reply_route{};
1276                          *
1277                          * also, the received function should always give us an extra
1278                          * character, into which we can put the 0-terminator now;
1279                          * an alternative would be allocating a new piece of memory,
1280                          * which might be too slow
1281                          * -jiri
1282                          *
1283                          * janakj: AVPs are zero terminated too so this is not problem
1284                          * either
1285                          */
1286                         backup=left->s[left->len];
1287                         left->s[left->len]='\0';
1288                         switch(rtype){
1289                                 case AVP_ST:
1290                                 case SELECT_ST:
1291                                 case RVE_ST:
1292                                 case PVAR_ST:
1293                                         /* we need to compile the RE on the fly */
1294                                         re=(regex_t*)pkg_malloc(sizeof(regex_t));
1295                                         if (re==0){
1296                                                 LOG(L_CRIT, "ERROR: comp_strstr: memory allocation"
1297                                                                          " failure\n");
1298                                                 left->s[left->len] = backup;
1299                                                 goto error;
1300                                         }
1301                                         if (regcomp(re, right->s,
1302                                                                 REG_EXTENDED|REG_NOSUB|REG_ICASE)) {
1303                                                 pkg_free(re);
1304                                                 left->s[left->len] = backup;
1305                                                 goto error;
1306                                         }
1307                                         ret=(regexec(re, left->s, 0, 0, 0)==0);
1308                                         regfree(re);
1309                                         pkg_free(re);
1310                                         break;
1311                                 case RE_ST:
1312                                         ret=(regexec(r->re, left->s, 0, 0, 0)==0);
1313                                         break;
1314                                 case STRING_ST:
1315                                 default:
1316                                         LOG(L_CRIT, "BUG: comp_str: Bad operator type %d, "
1317                                                                 "for ~= \n", rtype);
1318                                         goto error;
1319                         }
1320                         left->s[left->len] = backup;
1321                         break;
1322                 default:
1323                         LOG(L_CRIT, "BUG: comp_str: unknown op %d\n", op);
1324                         goto error;
1325         }
1326         if (rv){
1327                 rval_cache_clean(&rv_cache);
1328                 rval_destroy(rv);
1329         }
1330         if (destroy_pval)
1331                 pv_value_destroy(&pval);
1332         return ret;
1333
1334 error:
1335         if (rv){
1336                 rval_cache_clean(&rv_cache);
1337                 rval_destroy(rv);
1338         }
1339         if (destroy_pval)
1340                 pv_value_destroy(&pval);
1341         return (op == DIFF_OP) ? 1 : -1;
1342 }
1343
1344
1345 /* eval_elem helping function, returns str op param */
1346 inline static int comp_string(int op, char* left, int rtype, union exp_op* r,
1347                                                                 struct sip_msg* msg, struct run_act_ctx* h)
1348 {
1349         str s;
1350
1351         s.s=left;
1352         s.len=strlen(left);
1353         return comp_str(op, &s, rtype, r, msg, h);
1354 }
1355
1356
1357 inline static int comp_avp(int op, avp_spec_t* spec, int rtype,
1358                                                         union exp_op* r, struct sip_msg* msg,
1359                                                         struct run_act_ctx* h)
1360 {
1361         avp_t* avp;
1362         int_str val;
1363         union exp_op num_val;
1364         str tmp;
1365         unsigned int uval;
1366
1367         if (spec->type & AVP_INDEX_ALL) {
1368                 avp = search_first_avp(spec->type & ~AVP_INDEX_ALL, spec->name,
1369                                                                 NULL, NULL);
1370                 return (avp!=0);
1371         }
1372         avp = search_avp_by_index(spec->type, spec->name, &val, spec->index);
1373         if (!avp) return (op == DIFF_OP);
1374
1375         if (op==NO_OP){
1376                 if (avp->flags & AVP_VAL_STR) {
1377                         return val.s.len!=0;
1378                 } else {
1379                         return val.n != 0;
1380                 }
1381         }
1382         if (avp->flags & AVP_VAL_STR) {
1383                 return comp_str(op, &val.s, rtype, r, msg, h);
1384         } else {
1385                 switch(rtype){
1386                         case NUMBER_ST:
1387                         case AVP_ST:
1388                         case RVE_ST:
1389                         case PVAR_ST:
1390                                 return comp_num(op, val.n, rtype, r, msg, h);
1391                                 break;
1392                         case STRING_ST:
1393                                 tmp.s=r->string;
1394                                 tmp.len=strlen(r->string);
1395                                 if (str2int(&tmp, &uval)<0){
1396                                         LOG(L_WARN, "WARNING: comp_avp: cannot convert"
1397                                                                 " string value to int (%s)\n",
1398                                                                 ZSW(r->string));
1399                                         goto error;
1400                                 }
1401                                 num_val.numval=uval;
1402                                 return comp_num(op, val.n, NUMBER_ST, &num_val, msg, h);
1403                         case STR_ST:
1404                                 if (str2int(&r->str, &uval)<0){
1405                                         LOG(L_WARN, "WARNING: comp_avp: cannot convert str value"
1406                                                                 " to int (%.*s)\n", r->str.len, ZSW(r->str.s));
1407                                         goto error;
1408                                 }
1409                                 num_val.numval=uval;
1410                                 return comp_num(op, val.n, NUMBER_ST, &num_val, msg, h);
1411                         default:
1412                                 LOG(L_CRIT, "BUG: comp_avp: invalid type for numeric avp "
1413                                                         "comparison (%d)\n", rtype);
1414                                 goto error;
1415                 }
1416         }
1417 error:
1418         return (op == DIFF_OP) ? 1 : -1;
1419 }
1420
1421 /*
1422  * Left side of expression was select
1423  */
1424 inline static int comp_select(int op, select_t* sel, int rtype,
1425                                                                 union exp_op* r, struct sip_msg* msg,
1426                                                                 struct run_act_ctx* h)
1427 {
1428         int ret;
1429         str val;
1430         char empty_str=0;
1431
1432         ret = run_select(&val, sel, msg);
1433         if (ret != 0) return (op == DIFF_OP);
1434
1435         if (op==NO_OP) return (val.len>0);
1436         if (unlikely(val.len==0)) {
1437                 /* make sure the string pointer uses accessible memory range
1438                  * the comp_str function might dereference it
1439                  */
1440                 val.s=&empty_str;
1441         }
1442         return comp_str(op, &val, rtype, r, msg, h);
1443 }
1444
1445
1446 inline static int comp_rve(int op, struct rval_expr* rve, int rtype,
1447                                                         union exp_op* r, struct sip_msg* msg,
1448                                                         struct run_act_ctx* h)
1449 {
1450         int i;
1451         struct rvalue* rv;
1452         struct rvalue* rv1;
1453         struct rval_cache c1;
1454
1455         rval_cache_init(&c1);
1456         if (unlikely(rval_expr_eval_rvint(h,  msg, &rv, &i, rve, &c1)<0)){
1457                 ERR("failure evaluating expression: bad type\n");
1458                 i=0; /* false */
1459                 goto int_expr;
1460         }
1461         if (unlikely(rv)){
1462                 /* no int => str */
1463                 rv1=rval_convert(h, msg, RV_STR, rv, &c1);
1464                 i=comp_str(op, &rv1->v.s, rtype, r, msg, h);
1465                 rval_destroy(rv1);
1466                 rval_destroy(rv);
1467                 rval_cache_clean(&c1);
1468                 return i;
1469         }
1470         /* expr evaluated to int */
1471 int_expr:
1472         rval_cache_clean(&c1);
1473         if (op==NO_OP)
1474                 return !(!i); /* transform it into { 0, 1 } */
1475         return comp_num(op, i, rtype, r, msg, h);
1476 }
1477
1478
1479
1480 inline static int comp_pvar(int op, pv_spec_t* pvs, int rtype,
1481                                                         union exp_op* r, struct sip_msg* msg,
1482                                                         struct run_act_ctx* h)
1483 {
1484         pv_value_t pval;
1485         int ret;
1486
1487         ret=0;
1488         memset(&pval, 0, sizeof(pv_value_t));
1489         if (unlikely(pv_get_spec_value(msg, r->param, &pval)!=0)){
1490                 return 0; /* error, not found => false */
1491         }
1492         if (likely(pval.flags & PV_TYPE_INT)){
1493                 if (op==NO_OP)
1494                         ret=!(!pval.ri);
1495                 else
1496                         ret=comp_num(op, pval.ri, rtype, r, msg, h);
1497         }else if ((pval.flags==PV_VAL_NONE) ||
1498                         (pval.flags & (PV_VAL_NULL|PV_VAL_EMPTY))){
1499                 if (op==NO_OP)
1500                         ret=0;
1501                 else
1502                         ret=comp_num(op, 0, rtype, r, msg, h);
1503         }else{
1504                 ret=pval.rs.len!=0;
1505                 if (op!=NO_OP)
1506                         ret=comp_num(op, ret, rtype, r, msg, h);
1507         }
1508         pv_value_destroy(&pval);
1509         return ret;
1510 }
1511
1512
1513
1514 /* check_self wrapper -- it checks also for the op */
1515 inline static int check_self_op(int op, str* s, unsigned short p)
1516 {
1517         int ret;
1518
1519         ret=check_self(s, p, 0);
1520         switch(op){
1521                 case EQUAL_OP:
1522                 case MATCH_OP:
1523                         break;
1524                 case DIFF_OP:
1525                         ret=(ret > 0) ? 0 : 1;
1526                         break;
1527                 default:
1528                         LOG(L_CRIT, "BUG: check_self_op: invalid operator %d\n", op);
1529                         ret=-1;
1530         }
1531         return ret;
1532 }
1533
1534
1535 /* eval_elem helping function, returns an op param */
1536 inline static int comp_ip(int op, struct ip_addr* ip, int rtype,
1537                                                         union exp_op* r, struct sip_msg* msg,
1538                                                         struct run_act_ctx *ctx )
1539 {
1540         struct hostent* he;
1541         char ** h;
1542         int ret;
1543         str tmp;
1544
1545         ret=-1;
1546         switch(rtype){
1547                 case NET_ST:
1548                         switch(op){
1549                                 case EQUAL_OP:
1550                                         ret=(matchnet(ip, r->net)==1);
1551                                         break;
1552                                 case DIFF_OP:
1553                                         ret=(matchnet(ip, r->net)!=1);
1554                                         break;
1555                                 default:
1556                                         goto error_op;
1557                         }
1558                         break;
1559                 case AVP_ST:
1560                 case STRING_ST:
1561                 case RE_ST:
1562                 case RVE_ST:
1563                 case SELECT_ST:
1564                         switch(op){
1565                                 case EQUAL_OP:
1566                                 case MATCH_OP:
1567                                         /* 1: compare with ip2str*/
1568                                         ret=comp_string(op, ip_addr2a(ip), rtype, r, msg, ctx);
1569                                         if (likely(ret==1)) break;
1570                                         /* 2: resolve (name) & compare w/ all the ips */
1571                                         if (rtype==STRING_ST){
1572                                                 he=resolvehost(r->str.s);
1573                                                 if (he==0){
1574                                                         DBG("comp_ip: could not resolve %s\n",
1575                                                             r->str.s);
1576                                                 }else if (he->h_addrtype==ip->af){
1577                                                         for(h=he->h_addr_list;(ret!=1)&& (*h); h++){
1578                                                                 ret=(memcmp(ip->u.addr, *h, ip->len)==0);
1579                                                         }
1580                                                         if (ret==1) break;
1581                                                 }
1582                                         }
1583                                         /* 3: (slow) rev dns the address
1584                                         * and compare with all the aliases
1585                                         * !!??!! review: remove this? */
1586                                         if (unlikely((received_dns & DO_REV_DNS) &&
1587                                                         ((he=rev_resolvehost(ip))!=0) )){
1588                                                 /*  compare with primary host name */
1589                                                 ret=comp_string(op, he->h_name, rtype, r, msg, ctx);
1590                                                 /* compare with all the aliases */
1591                                                 for(h=he->h_aliases; (ret!=1) && (*h); h++){
1592                                                         ret=comp_string(op, *h, rtype, r, msg, ctx);
1593                                                 }
1594                                         }else{
1595                                                 ret=0;
1596                                         }
1597                                         break;
1598                                 case DIFF_OP:
1599                                         ret=(comp_ip(EQUAL_OP, ip, rtype, r, msg, ctx) > 0) ?0:1;
1600                                         break;
1601                                 default:
1602                                         goto error_op;
1603                         }
1604                         break;
1605                 case MYSELF_ST: /* check if it's one of our addresses*/
1606                         tmp.s=ip_addr2a(ip);
1607                         tmp.len=strlen(tmp.s);
1608                         ret=check_self_op(op, &tmp, 0);
1609                         break;
1610                 default:
1611                         LOG(L_CRIT, "BUG: comp_ip: invalid type for "
1612                                                 " src_ip or dst_ip (%d)\n", rtype);
1613                         ret=-1;
1614         }
1615         return ret;
1616 error_op:
1617         LOG(L_CRIT, "BUG: comp_ip: invalid operator %d\n", op);
1618         return -1;
1619 }
1620
1621
1622
1623 /* returns: 0/1 (false/true) or -1 on error */
1624 inline static int eval_elem(struct run_act_ctx* h, struct expr* e,
1625                                                                 struct sip_msg* msg)
1626 {
1627         struct sip_uri uri;
1628         int ret;
1629         struct onsend_info* snd_inf;
1630         struct ip_addr ip;
1631         ret=E_BUG;
1632
1633         if (e->type!=ELEM_T){
1634                 LOG(L_CRIT," BUG: eval_elem: invalid type\n");
1635                 goto error;
1636         }
1637         switch(e->l_type){
1638         case METHOD_O:
1639                 ret=comp_str(e->op, &msg->first_line.u.request.method,
1640                                                 e->r_type, &e->r, msg, h);
1641                 break;
1642         case URI_O:
1643                 if(msg->new_uri.s) {
1644                         if (e->r_type==MYSELF_ST){
1645                                 if (parse_sip_msg_uri(msg)<0) ret=-1;
1646                                 else ret=check_self_op(e->op, &msg->parsed_uri.host,
1647                                                        msg->parsed_uri.port_no?
1648                                                        msg->parsed_uri.port_no:SIP_PORT);
1649                         }else{
1650                                 ret=comp_str(e->op, &msg->new_uri,
1651                                                                 e->r_type, &e->r, msg, h);
1652                         }
1653                 }else{
1654                         if (e->r_type==MYSELF_ST){
1655                                 if (parse_sip_msg_uri(msg)<0) ret=-1;
1656                                 else ret=check_self_op(e->op, &msg->parsed_uri.host,
1657                                                        msg->parsed_uri.port_no?
1658                                                        msg->parsed_uri.port_no:SIP_PORT);
1659                         }else{
1660                                 ret=comp_str(e->op, &msg->first_line.u.request.uri,
1661                                                                 e->r_type, &e->r, msg, h);
1662                         }
1663                 }
1664                 break;
1665
1666         case FROM_URI_O:
1667                 if (parse_from_header(msg)!=0){
1668                         LOG(L_ERR, "ERROR: eval_elem: bad or missing"
1669                             " From: header\n");
1670                         goto error;
1671                 }
1672                 if (e->r_type==MYSELF_ST){
1673                         if (parse_uri(get_from(msg)->uri.s, get_from(msg)->uri.len,
1674                                       &uri) < 0){
1675                                 LOG(L_ERR, "ERROR: eval_elem: bad uri in From:\n");
1676                                 goto error;
1677                         }
1678                         ret=check_self_op(e->op, &uri.host,
1679                                           uri.port_no?uri.port_no:SIP_PORT);
1680                 }else{
1681                         ret=comp_str(e->op, &get_from(msg)->uri,
1682                                                         e->r_type, &e->r, msg, h);
1683                 }
1684                 break;
1685
1686         case TO_URI_O:
1687                 if ((msg->to==0) && ((parse_headers(msg, HDR_TO_F, 0)==-1) ||
1688                                      (msg->to==0))){
1689                         LOG(L_ERR, "ERROR: eval_elem: bad or missing"
1690                             " To: header\n");
1691                         goto error;
1692                 }
1693                      /* to content is parsed automatically */
1694                 if (e->r_type==MYSELF_ST){
1695                         if (parse_uri(get_to(msg)->uri.s, get_to(msg)->uri.len,
1696                                       &uri) < 0){
1697                                 LOG(L_ERR, "ERROR: eval_elem: bad uri in To:\n");
1698                                 goto error;
1699                         }
1700                         ret=check_self_op(e->op, &uri.host,
1701                                           uri.port_no?uri.port_no:SIP_PORT);
1702                 }else{
1703                         ret=comp_str(e->op, &get_to(msg)->uri,
1704                                                         e->r_type, &e->r, msg, h);
1705                 }
1706                 break;
1707
1708         case SRCIP_O:
1709                 ret=comp_ip(e->op, &msg->rcv.src_ip, e->r_type, &e->r, msg, h);
1710                 break;
1711
1712         case DSTIP_O:
1713                 ret=comp_ip(e->op, &msg->rcv.dst_ip, e->r_type, &e->r, msg, h);
1714                 break;
1715
1716         case SNDIP_O:
1717                 snd_inf=get_onsend_info();
1718                 if (likely(snd_inf && snd_inf->send_sock)){
1719                         ret=comp_ip(e->op, &snd_inf->send_sock->address,
1720                                                 e->r_type, &e->r, msg, h);
1721                 }else{
1722                         BUG("eval_elem: snd_ip unknown (not in a onsend_route?)\n");
1723                 }
1724                 break;
1725
1726         case TOIP_O:
1727                 snd_inf=get_onsend_info();
1728                 if (likely(snd_inf && snd_inf->to)){
1729                         su2ip_addr(&ip, snd_inf->to);
1730                         ret=comp_ip(e->op, &ip, e->r_type, &e->r, msg, h);
1731                 }else{
1732                         BUG("eval_elem: to_ip unknown (not in a onsend_route?)\n");
1733                 }
1734                 break;
1735
1736         case NUMBER_O:
1737                 ret=!(!e->r.numval); /* !! to transform it in {0,1} */
1738                 break;
1739
1740         case ACTION_O:
1741                 ret=run_actions(h, (struct action*)e->r.param, msg);
1742                 if (ret<=0) ret=0;
1743                 else ret=1;
1744                 break;
1745
1746         case SRCPORT_O:
1747                 ret=comp_num(e->op, (int)msg->rcv.src_port, e->r_type, &e->r, msg, h);
1748                 break;
1749
1750         case DSTPORT_O:
1751                 ret=comp_num(e->op, (int)msg->rcv.dst_port, e->r_type, &e->r, msg, h);
1752                 break;
1753
1754         case SNDPORT_O:
1755                 snd_inf=get_onsend_info();
1756                 if (likely(snd_inf && snd_inf->send_sock)){
1757                         ret=comp_num(e->op, (int)snd_inf->send_sock->port_no,
1758                                                         e->r_type, &e->r, msg, h);
1759                 }else{
1760                         BUG("eval_elem: snd_port unknown (not in a onsend_route?)\n");
1761                 }
1762                 break;
1763
1764         case TOPORT_O:
1765                 snd_inf=get_onsend_info();
1766                 if (likely(snd_inf && snd_inf->to)){
1767                         ret=comp_num(e->op, (int)su_getport(snd_inf->to),
1768                                                                 e->r_type, &e->r, msg, h);
1769                 }else{
1770                         BUG("eval_elem: to_port unknown (not in a onsend_route?)\n");
1771                 }
1772                 break;
1773
1774         case PROTO_O:
1775                 ret=comp_num(e->op, msg->rcv.proto, e->r_type, &e->r, msg, h);
1776                 break;
1777
1778         case SNDPROTO_O:
1779                 snd_inf=get_onsend_info();
1780                 if (likely(snd_inf && snd_inf->send_sock)){
1781                         ret=comp_num(e->op, snd_inf->send_sock->proto,
1782                                                         e->r_type, &e->r, msg, h);
1783                 }else{
1784                         BUG("eval_elem: snd_proto unknown (not in a onsend_route?)\n");
1785                 }
1786                 break;
1787
1788         case AF_O:
1789                 ret=comp_num(e->op, (int)msg->rcv.src_ip.af, e->r_type, &e->r, msg, h);
1790                 break;
1791
1792         case SNDAF_O:
1793                 snd_inf=get_onsend_info();
1794                 if (likely(snd_inf && snd_inf->send_sock)){
1795                         ret=comp_num(e->op, snd_inf->send_sock->address.af,
1796                                                         e->r_type, &e->r, msg, h);
1797                 }else{
1798                         BUG("eval_elem: snd_af unknown (not in a onsend_route?)\n");
1799                 }
1800                 break;
1801
1802         case MSGLEN_O:
1803                 if ((snd_inf=get_onsend_info())!=0){
1804                         ret=comp_num(e->op, (int)snd_inf->len, e->r_type, &e->r, msg, h);
1805                 }else{
1806                         ret=comp_num(e->op, (int)msg->len, e->r_type, &e->r, msg, h);
1807                 }
1808                 break;
1809
1810         case RETCODE_O:
1811                 ret=comp_num(e->op, h->last_retcode, e->r_type, &e->r, msg, h);
1812                 break;
1813
1814         case AVP_O:
1815                 ret = comp_avp(e->op, e->l.attr, e->r_type, &e->r, msg, h);
1816                 break;
1817
1818         case SELECT_O:
1819                 ret = comp_select(e->op, e->l.select, e->r_type, &e->r, msg, h);
1820                 break;
1821
1822         case RVEXP_O:
1823                 ret = comp_rve(e->op, e->l.param, e->r_type, &e->r, msg, h);
1824                 break;
1825
1826         case PVAR_O:
1827                 ret=comp_pvar(e->op, e->l.param, e->r_type, &e->r, msg, h);
1828                 break;
1829 /*
1830         default:
1831                 LOG(L_CRIT, "BUG: eval_elem: invalid operand %d\n",
1832                     e->l_type);
1833 */
1834         }
1835         return ret;
1836 error:
1837         return (e->op == DIFF_OP) ? 1 : -1;
1838 }
1839
1840
1841
1842 /* ret= 1/0 (true/false) ,  -1 on error (evaluates as false)*/
1843 int eval_expr(struct run_act_ctx* h, struct expr* e, struct sip_msg* msg)
1844 {
1845         int ret;
1846
1847         if (e->type==ELEM_T){
1848                 ret=eval_elem(h, e, msg);
1849         }else if (e->type==EXP_T){
1850                 switch(e->op){
1851                         case LOGAND_OP:
1852                                 ret=eval_expr(h, e->l.expr, msg);
1853                                 /* if error or false stop evaluating the rest */
1854                                 if (ret <= 0) break;
1855                                 ret=eval_expr(h, e->r.expr, msg); /*ret1 is 1*/
1856                                 break;
1857                         case LOGOR_OP:
1858                                 ret=eval_expr(h, e->l.expr, msg);
1859                                 /* if true stop evaluating the rest */
1860                                 if (ret > 0) break;
1861                                 ret=eval_expr(h, e->r.expr, msg); /* ret1 is 0 */
1862                                 break;
1863                         case NOT_OP:
1864                                 ret=eval_expr(h, e->l.expr, msg);
1865                                 ret=(ret > 0) ? 0 : 1;
1866                                 break;
1867                         default:
1868                                 LOG(L_CRIT, "BUG: eval_expr: unknown op %d\n", e->op);
1869                                 ret=-1;
1870                 }
1871         }else{
1872                 LOG(L_CRIT, "BUG: eval_expr: unknown type %d\n", e->type);
1873                 ret=-1;
1874         }
1875         return ret;
1876 }
1877
1878
1879 /* adds an action list to head; a must be null terminated (last a->next=0))*/
1880 void push(struct action* a, struct action** head)
1881 {
1882         struct action *t;
1883         if (*head==0){
1884                 *head=a;
1885                 return;
1886         }
1887         for (t=*head; t->next;t=t->next);
1888         t->next=a;
1889 }
1890
1891
1892
1893
1894 int add_actions(struct action* a, struct action** head)
1895 {
1896         int ret;
1897
1898         LOG(L_DBG, "add_actions: fixing actions...\n");
1899         if ((ret=fix_actions(a))!=0) goto error;
1900         push(a,head);
1901         return 0;
1902
1903 error:
1904         return ret;
1905 }
1906
1907
1908
1909 static int fix_rl(struct route_list* rt)
1910 {
1911         int i;
1912         int ret;
1913
1914         for(i=0;i<rt->idx; i++){
1915                 if(rt->rlist[i]){
1916                         if ((ret=fix_actions(rt->rlist[i]))!=0){
1917                                 return ret;
1918                         }
1919                 }
1920         }
1921         return 0;
1922 }
1923
1924
1925
1926 /* fixes all action tables */
1927 /* returns 0 if ok , <0 on error */
1928 int fix_rls()
1929 {
1930         int ret;
1931
1932         if ((ret=fix_rl(&main_rt))!=0)
1933                 return ret;
1934         if ((ret=fix_rl(&onreply_rt))!=0)
1935                 return ret;
1936         if ((ret=fix_rl(&failure_rt))!=0)
1937                 return ret;
1938         if ((ret=fix_rl(&branch_rt))!=0)
1939                 return ret;
1940         if ((ret=fix_rl(&onsend_rt))!=0)
1941                 return ret;
1942         if ((ret=fix_rl(&event_rt))!=0)
1943                 return ret;
1944
1945         return 0;
1946 }
1947
1948
1949
1950 static void print_rl(struct route_list* rt, char* name)
1951 {
1952         int j;
1953
1954         for(j=0; j<rt->entries; j++){
1955                 if (rt->rlist[j]==0){
1956                         if ((j==0) && (rt==&main_rt))
1957                                 DBG("WARNING: the main routing table is empty\n");
1958                         continue;
1959                 }
1960                 DBG("%s routing table %d:\n", name, j);
1961                 print_actions(rt->rlist[j]);
1962                 DBG("\n");
1963         }
1964 }
1965
1966
1967 /* debug function, prints routing tables */
1968 void print_rls()
1969 {
1970         print_rl(&main_rt, "");
1971         print_rl(&onreply_rt, "onreply");
1972         print_rl(&failure_rt, "failure");
1973         print_rl(&branch_rt, "branch");
1974         print_rl(&onsend_rt, "onsend");
1975         print_rl(&event_rt, "event");
1976 }