/src/opensips/action.c

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/*
 * Copyright (C) 2010-2014 OpenSIPS Solutions
 * Copyright (C) 2005-2006 Voice Sistem S.R.L.
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of opensips, a free SIP server.
 *
 * opensips is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * opensips is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 *
 * History:
 * ---------
 *  2003-02-28  scratchpad compatibility abandoned (jiri)
 *  2003-01-29  removed scratchpad (jiri)
 *  2003-03-19  fixed set* len calculation bug & simplified a little the code
 *              (should be a little faster now) (andrei)
 *              replaced all mallocs/frees w/ pkg_malloc/pkg_free (andrei)
 *  2003-04-01  Added support for loose routing in forward (janakj)
 *  2003-04-12  FORCE_RPORT_T added (andrei)
 *  2003-04-22  strip_tail added (jiri)
 *  2003-10-02  added SET_ADV_ADDR_T & SET_ADV_PORT_T (andrei)
 *  2003-10-29  added FORCE_TCP_ALIAS_T (andrei)
 *  2004-11-30  added FORCE_SEND_SOCKET_T (andrei)
 *  2005-11-29  added serialize_branches and next_branches (bogdan)
 *  2006-03-02  MODULE_T action points to a cmd_export_t struct instead to
 *               a function address - more info is accessible (bogdan)
 *  2006-05-22  forward(_udp,_tcp,_tls) and send(_tcp) merged in forward() and
 *               send() (bogdan)
 *  2006-12-22  functions for script and branch flags added (bogdan)
 */

/*!
 * \file
 * \brief OpenSIPS Generic functions
 */

#include "action.h"
#include "config.h"
#include "error.h"
#include "dprint.h"
#include "route.h"
#include "parser/msg_parser.h"
#include "ut.h"
#include "sr_module.h"
#include "mem/mem.h"
#include "errinfo.h"
#include "msg_translator.h"
#include "mod_fix.h"
#include "script_var.h"
#include "xlog.h"
#include "cfg_pp.h"

#include <string.h>

#ifdef DEBUG_DMALLOC
#include <dmalloc.h>
#endif

int action_flags = 0;
int return_code  = 0;
int max_while_loops = 10000;

/* script tracing options  */
int use_script_trace = 0;
int script_trace_log_level = L_ALERT;
char *script_trace_info = NULL;
pv_elem_t script_trace_elem;

extern err_info_t _oser_err_info;

action_time longest_action[LONGEST_ACTION_SIZE];
int min_action_time=0;

struct route_params_level {
  void *params;
  void *extra; /* extra params used */
  param_getf_t get_param;
};
static struct route_params_level route_params[ROUTE_MAX_REC_LEV];
static int route_rec_level = -1;

/* the current stack of route names (first route name is at index 0) */
char *route_stack[ROUTE_MAX_REC_LEV + 1];

/* the virtual start of the stack; typically 0, but may get temporarily bumped
 * with each added nesting level of script route callback execution
 * (e.g. due to logic similar to dlg_on_hangup(), followed by a SIP BYE) */
int route_stack_start;

/* the total size of the stack, counting from index 0 */
int route_stack_size;

int curr_action_line;
char *curr_action_file;

static int for_each_handler(struct sip_msg *msg, struct action *a);
static int route_param_get(struct sip_msg *msg,  pv_param_t *ip,
    pv_value_t *res, void *params, void *extra);


/* run actions from a route */
/* returns: 0, or 1 on success, <0 on error */
/* (0 if drop or break encountered, 1 if not ) */
static inline int run_actions(struct action* a, struct sip_msg* msg)
{
  int ret, _, ret_lvl;
  str top_route;

  if (route_stack_size > ROUTE_MAX_REC_LEV) {
    get_top_route_type(&top_route, &_);
    LM_ERR("route recursion limit reached, giving up! (nested routes: %d, "
               "first: '%.*s', last: '%s')!\n", route_stack_size,
            top_route.len, top_route.s, route_stack[ROUTE_MAX_REC_LEV]);
    ret=E_UNSPEC;
    goto error;
  }

  if (a==0){
    LM_WARN("null action list (route stack size: %d)\n",
            route_stack_size);
    ret=1;
    goto error;
  }

  ret_lvl=script_return_push();

  ret=run_action_list(a, msg);

  /* if 'return', reset the flag */
  if(action_flags&ACT_FL_RETURN)
    action_flags &= ~ACT_FL_RETURN;

  script_return_pop(ret_lvl);

  return ret;

error:
  return ret;
}


int _run_actions(struct action *a, struct sip_msg *msg)
{
  return run_actions(a, msg);
}


int inside_error_route;
void run_error_route(struct sip_msg* msg, int init_route_stack)
{
  int old_route;

  LM_DBG("triggering\n");
  inside_error_route = 1;

  if (init_route_stack) {
    swap_route_type(old_route, ERROR_ROUTE);

    route_stack[0] = NULL;
    route_stack_start = 0;
    route_stack_size = 1;

    run_actions(sroutes->error.a, msg);
    set_route_type(old_route);
  } else {
    route_params_push_level("!error_route", NULL, 0, route_param_get);
    run_actions(sroutes->error.a, msg);
    route_params_pop_level();
  }

  /* reset error info */
  init_err_info();
  inside_error_route = 0;
}


/* run a list of actions */
int run_action_list(struct action* a, struct sip_msg* msg)
{
  int ret=E_UNSPEC;
  struct action* t;
  for (t=a; t!=0; t=t->next){
    ret=do_action(t, msg);
    /* if action returns 0, then stop processing the script */
    if(ret==0)
      action_flags |= ACT_FL_EXIT;

    /* check for errors */
    if (_oser_err_info.eclass!=0 && sroutes->error.a!=NULL &&
    (route_type&(ONREPLY_ROUTE|LOCAL_ROUTE))==0 && !inside_error_route)
      run_error_route(msg, 0);

    /* continue or not ? */
    if (action_flags & (ACT_FL_RETURN | ACT_FL_EXIT | ACT_FL_BREAK))
      break;
  }
  return ret;
}

int run_top_route(struct script_route sr, struct sip_msg* msg)
{
  static int recursing;

  int bk_action_flags, route_stack_start_bkp = -1, route_stack_size_bkp;
  int ret;
  context_p ctx = NULL;

  bk_action_flags = action_flags;

  action_flags = 0;
  init_err_info();

  if (current_processing_ctx==NULL) {
    if ( (ctx=context_alloc(CONTEXT_GLOBAL))==NULL) {
      LM_ERR("failed to allocated new global context\n");
      return -1;
    }
    memset( ctx, 0, context_size(CONTEXT_GLOBAL));
    set_global_context(ctx);
  }

  /* the recursion support allows run_top_route() to be freely called from
   * other modules (e.g. dialog) in order to provide contextless script
   * callbacks using routes, without losing the original route stack */
  if (recursing) {
    route_stack_start_bkp = route_stack_start;
    route_stack_size_bkp = route_stack_size;
    route_stack_start = route_stack_size;
    route_stack_size += 1;
  } else {
    route_stack_start = 0;
    route_stack_size = 1;
    recursing = 1;
  }

  if (route_type & (ERROR_ROUTE|LOCAL_ROUTE|STARTUP_ROUTE) ||
       (route_type &
          (REQUEST_ROUTE|ONREPLY_ROUTE) && !strcmp(sr.name, "0")))
    route_stack[route_stack_start] = NULL;
  else
    route_stack[route_stack_start] = sr.name;

  run_actions(sr.a, msg);
  ret = action_flags;

  if (route_stack_start_bkp != -1) {
    route_stack_size = route_stack_size_bkp;
    route_stack_start = route_stack_start_bkp;
  } else {
    recursing = 0;
  }

  action_flags = bk_action_flags;
  /* reset script tracing */
  use_script_trace = 0;

  if (ctx && current_processing_ctx) {
    context_destroy(CONTEXT_GLOBAL, ctx);
    context_free(ctx);
    set_global_context(NULL);
  }

  return ret;
}


/* execute assignment operation */
int do_assign(struct sip_msg* msg, struct action* a)
{
  str st;
  int ret;
  pv_value_t lval, val;
  pv_spec_p dspec;

  dspec = (pv_spec_p)a->elem[0].u.data;
  if(!pv_is_w(dspec))
  {
    LM_ERR("read only PV in left expression\n");
    goto error;
  }

  memset(&val, 0, sizeof(pv_value_t));
  if(a->elem[1].type != NULLV_ST)
  {
    ret = eval_expr((struct expr*)a->elem[1].u.data, msg, &val);
    if(ret < 0 || !(val.flags & (PV_VAL_STR | PV_VAL_INT | PV_VAL_NULL)))
    {
      LM_WARN("no value in right expression at %s:%d\n",
        a->file, a->line);
      goto error2;
    }
  }

  switch (a->type) {
  case EQ_T:
  case COLONEQ_T:
    break;
  case PLUSEQ_T:
  case MINUSEQ_T:
  case DIVEQ_T:
  case MULTEQ_T:
  case MODULOEQ_T:
  case BANDEQ_T:
  case BOREQ_T:
  case BXOREQ_T:
    if (pv_get_spec_value(msg, dspec, &lval) != 0) {
      LM_ERR("failed to get left-hand side value\n");
      goto error;
    }

    if (lval.flags & PV_VAL_NULL || val.flags & PV_VAL_NULL) {
      LM_ERR("NULL value(s) in complex assignment expressions "
               "(+=, -=, etc.)\n");
      goto error;
    }

    /* both include STR versions and neither is primarily an INT */
    if ((lval.flags & PV_VAL_STR) && (val.flags & PV_VAL_STR) &&
      !(lval.flags & PV_TYPE_INT) && !(val.flags & PV_TYPE_INT)) {
      val.ri = 0;

      if (a->type != PLUSEQ_T)
        goto bad_operands;

      if (!(val.flags & PV_VAL_PKG)) {
        st = val.rs;
        val.rs.s = pkg_malloc(val.rs.len + lval.rs.len + 1);
        if (!val.rs.s) {
          val.rs.s = st.s;
          LM_ERR("oom 1\n");
          goto error;
        }

        memcpy(val.rs.s, lval.rs.s, lval.rs.len);
        memcpy(val.rs.s + lval.rs.len, st.s, st.len);
        val.rs.len += lval.rs.len;
        val.rs.s[val.rs.len] = '\0';
        val.flags |= PV_VAL_PKG;

        if (val.flags & PV_VAL_SHM) {
          val.flags &= ~PV_VAL_SHM;
          shm_free(st.s);
        }
      } else {
        st.len = val.rs.len;
        if (pkg_str_extend(&val.rs, val.rs.len + lval.rs.len + 1) != 0) {
          LM_ERR("oom 2\n");
          goto error;
        }
        val.rs.len--;
        memmove(val.rs.s + lval.rs.len, val.rs.s, st.len);
        memcpy(val.rs.s, lval.rs.s, lval.rs.len);
        val.rs.s[val.rs.len] = '\0';
      }
    } else if ((lval.flags & PV_VAL_INT) && (val.flags & PV_VAL_INT)) {
      if (val.flags & PV_VAL_STR)
        val.flags &= ~PV_VAL_STR;
      switch (a->type) {
      case PLUSEQ_T:
        val.ri = lval.ri + val.ri;
        break;
      case MINUSEQ_T:
        val.ri = lval.ri - val.ri;
        break;
      case DIVEQ_T:
        val.ri = lval.ri / val.ri;
        break;
      case MULTEQ_T:
        val.ri = lval.ri * val.ri;
        break;
      case MODULOEQ_T:
        val.ri = lval.ri % val.ri;
        break;
      case BANDEQ_T:
        val.ri = lval.ri & val.ri;
        break;
      case BOREQ_T:
        val.ri = lval.ri | val.ri;
        break;
      case BXOREQ_T:
        val.ri = lval.ri ^ val.ri;
        break;
      }
    } else {
      goto bad_operands;
    }
    break;
  default:
    LM_ALERT("BUG -> unknown op type %d\n", a->type);
    goto error;
  }

  script_trace("assign",
    (unsigned char)a->type == EQ_T      ? "equal" :
    (unsigned char)a->type == COLONEQ_T ? "colon-eq" :
    (unsigned char)a->type == PLUSEQ_T  ? "plus-eq" :
    (unsigned char)a->type == MINUSEQ_T ? "minus-eq" :
    (unsigned char)a->type == DIVEQ_T   ? "div-eq" :
    (unsigned char)a->type == MULTEQ_T  ? "mult-eq" :
    (unsigned char)a->type == MODULOEQ_T? "modulo-eq" :
    (unsigned char)a->type == BANDEQ_T  ? "b-and-eq" :
    (unsigned char)a->type == BOREQ_T   ? "b-or-eq":"b-xor-eq",
    msg, a->file, a->line);

  if(a->elem[1].type == NULLV_ST || (val.flags & PV_VAL_NULL))
  {
    if(pv_set_value(msg, dspec, (int)a->type, 0)<0)
    {
      LM_ERR("setting PV failed\n");
      goto error;
    }
  } else {
    if(pv_set_value(msg, dspec, (int)a->type, &val)<0)
    {
      LM_ERR("setting PV failed\n");
      goto error;
    }
  }

  pv_value_destroy(&val);
  return 1;

bad_operands:
  LM_ERR("unsupported operand type(s) for %s: %s and %s\n",
         assignop_str(a->type),
         lval.flags & PV_VAL_STR ? "string" : "int",
         val.flags & PV_VAL_STR ? "string" : "int");
  pv_value_destroy(&val);
  return -1;

error:
  LM_ERR("error at %s:%d\n", a->file, a->line);
error2:
  pv_value_destroy(&val);
  return -1;
}

static pv_value_t *route_params_expand(struct sip_msg *msg,
  void *params, int params_no)
{
  str tmp;
  int index;
  pv_value_t *route_vals, *res;
  action_elem_p actions = (action_elem_p)params;

  route_vals = pkg_malloc(params_no * sizeof(*route_vals));
  if (!route_vals) {
    LM_ERR("oom\n");
    return NULL;
  }
  memset(route_vals, 0, params_no * sizeof(*route_vals));

  for (index = 0; index < params_no; index++) {
    res = &route_vals[index];
    switch (actions[index].type)
    {
      case STRING_ST:
        res->rs.s = actions[index].u.string;
        res->rs.len = strlen(res->rs.s);
        res->flags = PV_VAL_STR;
        break;

      case NUMBER_ST:
        res->ri = actions[index].u.number;
        res->flags = PV_VAL_INT|PV_TYPE_INT;
        tmp.s = sint2str(res->ri, &tmp.len);
        if (pkg_str_dup(&res->rs, &tmp) == 0)
          res->flags |= PV_VAL_STR|PV_VAL_PKG;
        else
          LM_ERR("cannot duplicate param value\n");
        break;

      case SCRIPTVAR_ST:
        if(pv_get_spec_value(msg, (pv_spec_p)actions[index].u.data, res)==0)
        {
          if (pvv_is_str(res)) {
            /* but we need to duplicate the string */
            if (pkg_str_dup(&tmp, &res->rs) == 0) {
              res->rs.s = tmp.s;
              res->flags |= PV_VAL_PKG;
              break;
            } else {
              LM_ERR("cannot duplicate param value\n");
            }
          } else {
            break;
          }
        } else {
          LM_ERR("cannot get spec value\n");
        }
        /* fallback */

      default:
        LM_ALERT("BUG: invalid parameter type %d\n",
            actions[index].type);
        /* fallback */
      case NULLV_ST:
        res->rs.s = NULL;
        res->rs.len = res->ri = 0;
        res->flags = PV_VAL_NULL;
        break;
    }
  }
  return route_vals;
}

static void route_params_release(pv_value_t *params, int params_no)
{
  int p;
  for (p = 0; p < params_no; p++) {
    if (params[p].flags & PV_VAL_PKG)
      pkg_free(params[p].rs.s);
  }
  pkg_free(params);
}


/* function used to get parameter from a route scope */
static int route_param_get(struct sip_msg *msg,  pv_param_t *ip,
    pv_value_t *res, void *_params, void *_extra)
{
  int index;
  pv_value_t tv;
  pv_value_t *params = (pv_value_t *)_params;
  int params_no = (int)(unsigned long)_extra;

  if (params_no <= 0) {
    LM_DBG("route without parameters\n");
    return pv_get_null(msg, ip, res);
  }

  if(ip->pvn.type==PV_NAME_INTSTR)
  {
    if (ip->pvn.u.isname.type != 0)
    {
      LM_ERR("route $param variable accepts only integer indexes\n");
      return -1;
    }
    index = ip->pvn.u.isname.name.n;
  } else
  {
    /* pvar -> it might be another $param variable! */
    route_rec_level--;
    if(pv_get_spec_value(msg, (pv_spec_p)(ip->pvn.u.dname), &tv)!=0)
    {
      LM_ERR("cannot get spec value\n");
      route_rec_level++;
      return -1;
    }
    route_rec_level++;

    if(tv.flags&PV_VAL_NULL || tv.flags&PV_VAL_EMPTY)
    {
      LM_ERR("null or empty name\n");
      return -1;
    }
    if (!(tv.flags&PV_VAL_INT) || str2int(&tv.rs,(unsigned int*)&index) < 0)
    {
      LM_ERR("invalid index <%.*s>\n", tv.rs.len, tv.rs.s);
      return -1;
    }
  }

  if (!params)
  {
    LM_DBG("no parameter specified for this route\n");
    return pv_get_null(msg, ip, res);
  }

  if (index < 1 || index > params_no)
  {
    LM_DBG("no such parameter index %d\n", index);
    return pv_get_null(msg, ip, res);
  }

  /* the parameters start at 0, whereas the index starts from 1 */
  index--;
  *res = params[index];
  res->flags &= ~PV_VAL_PKG; /* not interested in this flag */

  return 0;
}

#define should_skip_updating(action_type) \
  (action_type == IF_T || action_type == ROUTE_T || \
   action_type == WHILE_T || action_type == FOR_EACH_T)

#define update_longest_action(a) do { \
    if (execmsgthreshold && !should_skip_updating((unsigned char)(a)->type)) { \
      end_time = get_time_diff(&start); \
      if (end_time > min_action_time) { \
        for (i=0;i<LONGEST_ACTION_SIZE;i++) { \
          if (longest_action[i].a_time < end_time) { \
            memmove(longest_action+i+1,longest_action+i,  \
                (LONGEST_ACTION_SIZE-i-1)*sizeof(action_time)); \
            longest_action[i].a_time=end_time;  \
            longest_action[i].a = a;  \
            min_action_time = longest_action[LONGEST_ACTION_SIZE-1].a_time; \
            break;  \
          } \
        } \
      } \
    } \
  } while(0)

/* ret= 0! if action -> end of list(e.g DROP),
      > 0 to continue processing next actions
   and <0 on error */
int do_action(struct action* a, struct sip_msg* msg)
{
  int ret;
  int v;
  int i;
  int len;
  int cmatch;
  struct action *aitem;
  struct action *adefault;
  pv_spec_t *spec;
  pv_value_t val;
  struct timeval start;
  int end_time;
  const cmd_export_t *cmd = NULL;
  const acmd_export_t *acmd;
  void* cmdp[MAX_CMD_PARAMS];
  pv_value_t tmp_vals[MAX_CMD_PARAMS];
  pv_value_t *route_p;
  str sval;

  /* reset the value of error to E_UNSPEC so avoid unknowledgable
     functions to return with error (status<0) and not setting it
     leaving there previous error; cache the previous value though
     for functions which want to process it */
  prev_ser_error=ser_error;
  ser_error=E_UNSPEC;

  start_expire_timer(start,execmsgthreshold);

  curr_action_line = a->line;
  curr_action_file = a->file;

  ret=E_BUG;
  switch ((unsigned char)a->type){
    case ASSERT_T:
        if (enable_asserts) {
          /* if null expr => ignore if? */
          if ((a->elem[0].type==EXPR_ST)&&a->elem[0].u.data){
            v=eval_expr((struct expr*)a->elem[0].u.data, msg, 0);

            ret=1;  /*default is continue */

            if (v<=0) {
              ret=0;

              if (a->elem[1].u.string)
                LM_CRIT("ASSERTION FAILED (%s) at %s:%d\n",
                        a->elem[1].u.string, a->file, a->line);
              else
                LM_CRIT("ASSERTION FAILED at %s:%d\n",
                        a->file, a->line);

              if (abort_on_assert) {
                abort();
              } else {
                set_err_info(OSER_EC_ASSERT, OSER_EL_CRITIC, "assertion failed");
                set_err_reply(500, "server error");

                run_error_route(msg, 0);
              }
            }
          }
        }
      break;
    case DROP_T:
        script_trace("core", "drop", msg, a->file, a->line) ;
        action_flags |= ACT_FL_DROP|ACT_FL_EXIT;
      break;
    case EXIT_T:
        script_trace("core", "exit", msg, a->file, a->line) ;
        ret=0;
        action_flags |= ACT_FL_EXIT;
      break;
    case RETURN_T:
        if (a->elem[1].type == EXPR_ST)
          script_return_set(msg, a->elem[1].u.data);
        else
          script_return_set(msg, NULL);
        script_trace("core", "return", msg, a->file, a->line) ;
        if (a->elem[0].type == SCRIPTVAR_ST)
        {
          spec = (pv_spec_t*)a->elem[0].u.data;
          if(pv_get_spec_value(msg, spec, &val)!=0
            || (val.flags&PV_VAL_NULL))
          {
            ret=-1;
          } else {
            if(!(val.flags&PV_VAL_INT))
              ret = 1;
            else
              ret = val.ri;
          }
          pv_value_destroy(&val);
        } else {
          ret=a->elem[0].u.number;
        }
        action_flags |= ACT_FL_RETURN;
      break;
    case LOG_T:
      script_trace("core", "log", msg, a->file, a->line) ;
      if ((a->elem[0].type!=NUMBER_ST)|(a->elem[1].type!=STRING_ST)){
        LM_ALERT("BUG in log() types %d, %d\n",
            a->elem[0].type, a->elem[1].type);
        ret=E_BUG;
        break;
      }
      LM_GEN1(a->elem[0].u.number, "%s", a->elem[1].u.string);
      ret=1;
      break;
    case LEN_GT_T:
      script_trace("core", "len_gt", msg, a->file, a->line) ;
      if (a->elem[0].type!=NUMBER_ST) {
        LM_ALERT("BUG in len_gt type %d\n",
          a->elem[0].type );
        ret=E_BUG;
        break;
      }
      ret = (msg->len >= (unsigned int)a->elem[0].u.number) ? 1 : -1;
      break;
    case ERROR_T:
      script_trace("core", "error", msg, a->file, a->line) ;
      if ((a->elem[0].type!=STRING_ST)|(a->elem[1].type!=STRING_ST)){
        LM_ALERT("BUG in error() types %d, %d\n",
            a->elem[0].type, a->elem[1].type);
        ret=E_BUG;
        break;
      }
      LM_ERR("error(\"%s\", \"%s\") not implemented yet\n",
        a->elem[0].u.string, a->elem[1].u.string);
      ret=1;
      break;
    case ROUTE_T:
      init_str(&sval, "unknown");
      switch (a->elem[0].type) {
        case NUMBER_ST:
          i = a->elem[0].u.number;
          break;
        case SCRIPTVAR_ST:
          if (pv_get_spec_value(msg, a->elem[0].u.item, &val) < 0) {
            LM_ERR("cannot print route name!\n");
            i = -1;
            break;
          }
          if (val.flags & PV_VAL_INT)
            sval.s = int2str(val.ri, &sval.len);
          else
            sval = val.rs;
          i = get_script_route_ID_by_name_str(&sval, sroutes->request, RT_NO);
          break;
        case SCRIPTVAR_ELEM_ST:
          if (pv_printf_s(msg, a->elem[0].u.data, &sval) < 0) {
            LM_ERR("cannot print route name!\n");
            i = -1;
            break;
          }
          i = get_script_route_ID_by_name_str(&sval, sroutes->request, RT_NO);
          break;
        default:
          i = -1;
          break;
      }
      if (i == -1) {
        LM_ALERT("unknown route(%.*s) (type %d)\n", sval.len, sval.s,
            a->elem[0].type);
        ret=E_BUG;
        break;
      }
      if ((i>=RT_NO)||(i<0)){
        LM_BUG("invalid routing table number in route(%u)\n", i);
        ret=E_CFG;
        break;
      }
      script_trace("route", sroutes->request[i].name,
        msg, a->file, a->line) ;
      /* check if the route has parameters */
      if (a->elem[1].type != 0) {
        if (a->elem[1].type != NUMBER_ST || a->elem[2].type != SCRIPTVAR_ST) {
          LM_ALERT("BUG in route() type %d/%d\n",
              a->elem[1].type, a->elem[2].type);
          ret=E_BUG;
          break;
        }
        len = a->elem[1].u.number;
        route_p = route_params_expand(msg, a->elem[2].u.data, len);
        if (!route_p) {
          LM_ERR("could not expand route params!\n");
          ret=E_OUT_OF_MEM;
          break;
        }
        route_params_push_level(sroutes->request[i].name,
            route_p, (void *)(unsigned long)len, route_param_get);
        return_code=run_actions(sroutes->request[i].a, msg);
        route_params_release(route_p, len);
        route_params_pop_level();
      } else {
        route_params_push_level(sroutes->request[i].name, NULL, 0, route_param_get);
        return_code=run_actions(sroutes->request[i].a, msg);
        route_params_pop_level();
      }
      ret=return_code;
      break;
    case IF_T:
      script_trace("core", "if", msg, a->file, a->line) ;
        /* if null expr => ignore if? */
        if ((a->elem[0].type==EXPR_ST)&&a->elem[0].u.data){
          v=eval_expr((struct expr*)a->elem[0].u.data, msg, 0);
          /* set return code to expr value */
          if (v<0 || (action_flags&ACT_FL_RETURN)
              || (action_flags&ACT_FL_EXIT) ){
            if (v==EXPR_DROP || (action_flags&ACT_FL_RETURN)
                || (action_flags&ACT_FL_EXIT) ){ /* hack to quit on DROP*/
              ret=0;
              return_code = 0;
              break;
            }else{
              LM_WARN("error in expression at %s:%d\n",
                a->file, a->line);
            }
          }

          ret=1;  /*default is continue */
          if (v>0) {
            if ((a->elem[1].type==ACTIONS_ST)&&a->elem[1].u.data){
              ret=run_action_list(
                  (struct action*)a->elem[1].u.data,msg );
              return_code = ret;
            } else return_code = v;
          }else{
            if ((a->elem[2].type==ACTIONS_ST)&&a->elem[2].u.data){
              ret=run_action_list(
                (struct action*)a->elem[2].u.data,msg);
              return_code = ret;
            } else return_code = v;
          }
        }
      break;
    case WHILE_T:
      script_trace("core", "while", msg, a->file, a->line) ;
      /* if null expr => ignore if? */
      if ((a->elem[0].type==EXPR_ST)&&a->elem[0].u.data){
        len = 0;
        while(1)
        {
          if(len++ >= max_while_loops)
          {
            LM_ERR("max while loops reached (%d), increase the "
                   "'max_while_loops' global!\n", max_while_loops);
            break;
          }
          v=eval_expr((struct expr*)a->elem[0].u.data, msg, 0);
          /* set return code to expr value */
          if (v<0 || (action_flags&ACT_FL_RETURN)
              || (action_flags&ACT_FL_EXIT) ){
            if (v==EXPR_DROP || (action_flags&ACT_FL_RETURN)
                || (action_flags&ACT_FL_EXIT) ){
              ret=0;
              return_code = 0;
              break;
            }else{
              LM_WARN("error in expression at %s:%d\n",
                  a->file, a->line);
            }
          }

          ret=1;  /*default is continue */
          if (v>0) {
            if ((a->elem[1].type==ACTIONS_ST)
                &&a->elem[1].u.data){
              ret=run_action_list(
                (struct action*)a->elem[1].u.data,msg );
              /* check if return was done */
              if (action_flags &
                  (ACT_FL_RETURN|ACT_FL_EXIT|ACT_FL_BREAK)) {
                action_flags &= ~ACT_FL_BREAK;
                break;
              }
              return_code = ret;
            } else {
              /* we should not get here */
              return_code = v;
              break;
            }
          } else {
            /* condition was false */
            return_code = v;
            break;
          }
        }
      }
      break;
    case BREAK_T:
      script_trace("core", "break", msg, a->file, a->line) ;
      action_flags |= ACT_FL_BREAK;
      break;
    case FOR_EACH_T:
      script_trace("core", "for-each", msg, a->file, a->line) ;
      ret = for_each_handler(msg, a);
      break;
    case XDBG_T:
      script_trace("core", "xdbg", msg, a->file, a->line) ;
      if (a->elem[0].type == SCRIPTVAR_ELEM_ST)
      {
        ret = xdbg(msg, a->elem[0].u.data);
        if (ret < 0)
        {
          LM_ERR("error while printing xdbg message\n");
          break;
        }
      }
      else
      {
        LM_ALERT("BUG in xdbg() type %d\n", a->elem[0].type);
        ret=E_BUG;
      }
      break;
    case XLOG_T:
      script_trace("core", "xlog", msg, a->file, a->line) ;
      if (a->elem[1].u.data != NULL)
      {
        if (a->elem[1].type != SCRIPTVAR_ELEM_ST)
        {
          LM_ALERT("BUG in xlog() type %d\n", a->elem[1].type);
          ret=E_BUG;
          break;
        }
        if (a->elem[0].type != STR_ST)
        {
          LM_ALERT("BUG in xlog() type %d\n", a->elem[0].type);
          ret=E_BUG;
          break;
        }
        ret = xlog_2(msg,a->elem[0].u.data, a->elem[1].u.data);
        if (ret < 0)
        {
          LM_ERR("error while printing xlog message\n");
          break;
        }
      }
      else
      {
        if (a->elem[0].type != SCRIPTVAR_ELEM_ST)
        {
          LM_ALERT("BUG in xlog() type %d\n", a->elem[0].type);
          ret=E_BUG;
          break;
        }
        ret = xlog_1(msg,a->elem[0].u.data);
        if (ret < 0)
        {
          LM_ERR("error while printing xlog message\n");
          break;
        }
      }

      break;
    case SWITCH_T:
      script_trace("core", "switch", msg, a->file, a->line) ;
#ifdef EXTRA_DEBUG
      if (a->elem[0].type!=SCRIPTVAR_ST || a->elem[1].type!=ACTIONS_ST) {
        LM_ALERT("BUG in switch() type %d\n",
            a->elem[0].type);
        ret=E_BUG;
        break;
      }
#endif
      spec = (pv_spec_t*)a->elem[0].u.data;
      if(pv_get_spec_value(msg, spec, &val)!=0)
      {
        LM_ALERT("BUG - no value in switch()\n");
        ret=E_BUG;
        break;
      }

      return_code=1;
      adefault = NULL;
      aitem = (struct action*)a->elem[1].u.data;
      cmatch=0;
      while(aitem)
      {
        if((unsigned char)aitem->type==DEFAULT_T)
          adefault=aitem;
        if(cmatch==0)
        {
          if(aitem->elem[0].type==STR_ST)
          {
            if(val.flags&PV_VAL_STR
                && val.rs.len==aitem->elem[0].u.s.len
                && strncasecmp(val.rs.s, aitem->elem[0].u.s.s,
                  val.rs.len)==0)
              cmatch = 1;
          } else { /* number */
            if(val.flags&PV_VAL_INT &&
                val.ri==aitem->elem[0].u.number)
              cmatch = 1;
          }
        }
        if(cmatch==1)
        {
          if(aitem->elem[1].u.data)
          {
            return_code=run_action_list(
              (struct action*)aitem->elem[1].u.data, msg);
            if (action_flags &
                (ACT_FL_RETURN | ACT_FL_EXIT | ACT_FL_BREAK)) {
              action_flags &= ~ACT_FL_BREAK;
              break;
            }
          }

          if (!aitem->next)
            cmatch = 0;
        }
        aitem = aitem->next;
      }
      if((cmatch==0) && (adefault!=NULL))
      {
        LM_DBG("switch: running default statement\n");
        if(adefault->elem[0].u.data)
          return_code=run_action_list(
            (struct action*)adefault->elem[0].u.data, msg);
        if (action_flags & ACT_FL_BREAK)
          action_flags &= ~ACT_FL_BREAK;
      }
      ret=return_code;
      break;
    case CMD_T:
      if (a->elem[0].type != CMD_ST ||
        ((cmd = (const cmd_export_t*)a->elem[0].u.data_const) == NULL)) {
        LM_ALERT("BUG in module call\n");
        break;
      }

      script_trace("module", cmd->name, msg, a->file, a->line);

      if ((ret = get_cmd_fixups(msg, cmd->params, a->elem, cmdp,
        tmp_vals)) < 0) {
        LM_ERR("Failed to get fixups for command <%s> in %s, line %d\n",
          cmd->name, a->file, a->line);
        break;
      }

      ret = cmd->function(msg,
        cmdp[0],cmdp[1],cmdp[2],
        cmdp[3],cmdp[4],cmdp[5],
        cmdp[6],cmdp[7]);

      if (free_cmd_fixups(cmd->params, a->elem, cmdp) < 0) {
        LM_ERR("Failed to free fixups for command <%s> in %s, line %d\n",
          cmd->name, a->file, a->line);
        break;
      }

      break;
    case ASYNC_T:
      /* first param - an ACTIONS_ST containing an ACMD_ST
       * second param - a ROUTE_REF_ST pointing to resume route
       * third param - an optional NUMBER_ST with a timeout */
      aitem = (struct action *)(a->elem[0].u.data);
      acmd = (const acmd_export_t *)aitem->elem[0].u.data_const;

      if (async_script_start_f==NULL || a->elem[0].type!=ACTIONS_ST ||
      a->elem[1].type!=ROUTE_REF_ST || aitem->type!=AMODULE_T) {
        LM_ALERT("BUG in async expression "
                 "(is the 'tm' module loaded?)\n");
      } else {
        script_trace("async", acmd->name, msg, a->file, a->line);

        if ((ret = get_cmd_fixups(msg, acmd->params, aitem->elem, cmdp,
          tmp_vals)) < 0) {
          LM_ERR("Failed to get fixups for async command <%s> in %s,"
                 " line %d\n", acmd->name, a->file, a->line);
          break;
        }

        ret = async_script_start_f(msg, aitem,
          (struct script_route_ref*)a->elem[1].u.data,
          (unsigned int)a->elem[2].u.number, cmdp);
        if (ret>=0)
          action_flags |= ACT_FL_TBCONT;

        if (free_cmd_fixups(acmd->params, aitem->elem, cmdp) < 0) {
          LM_ERR("Failed to free fixups for async command <%s> in %s,"
                 " line %d\n", acmd->name, a->file, a->line);
          break;
        }
      }
      ret = 0;
      break;
    case LAUNCH_T:
      /* first param - an ACTIONS_ST containing an ACMD_ST
       * second param - an optional ROUTE_REF_ST pointing to an end route */
      aitem = (struct action *)(a->elem[0].u.data);
      acmd = (const acmd_export_t *)aitem->elem[0].u.data_const;

      if (async_script_start_f==NULL || a->elem[0].type!=ACTIONS_ST ||
      a->elem[1].type!=ROUTE_REF_ST || aitem->type!=AMODULE_T) {
        LM_ALERT("BUG in launch expression\n");
      } else {
        script_trace("launch", acmd->name, msg, a->file, a->line);
        /* NOTE that the routeID (a->elem[1].u.data) is set to 
         * NULL if no reporting route is set */

        if ((ret = get_cmd_fixups(msg, acmd->params, aitem->elem,
          cmdp, tmp_vals)) < 0) {
          LM_ERR("Failed to get fixups for launch command <%s> in %s,"
                 " line %d\n", acmd->name, a->file, a->line);
          break;
        }

        if (a->elem[2].type==SCRIPTVAR_ELEM_ST && a->elem[2].u.data) {
          if (pv_printf_s(msg, a->elem[2].u.data, &sval) < 0) {
            LM_ERR("cannot print resume route parameter!\n");
            break;
          }

          ret = async_script_launch( msg, aitem,
            (struct script_route_ref*)a->elem[1].u.data,
            &sval, cmdp);
        } else {
          ret = async_script_launch( msg, aitem,
            (struct script_route_ref*)a->elem[1].u.data,
            NULL, cmdp);
        }

        if (free_cmd_fixups(acmd->params, aitem->elem, cmdp) < 0) {
          LM_ERR("Failed to free fixups for launch command <%s> in %s,"
                 " line %d\n", acmd->name, a->file, a->line);
          break;
        }
      }
      break;
    case EQ_T:
    case COLONEQ_T:
    case PLUSEQ_T:
    case MINUSEQ_T:
    case DIVEQ_T:
    case MULTEQ_T:
    case MODULOEQ_T:
    case BANDEQ_T:
    case BOREQ_T:
    case BXOREQ_T:
      ret = do_assign(msg, a);
      break;
    default:
      LM_ALERT("BUG - unknown type %d\n", a->type);
      goto error;
  }

  if((unsigned char)a->type!=IF_T && (unsigned char)a->type!=ROUTE_T)
    return_code = ret;
/*skip:*/

  update_longest_action(a);
  return ret;

error:
  LM_ERR("error in %s:%d\n", a->file, a->line);
  update_longest_action(a);
  return ret;
}

static int for_each_handler(struct sip_msg *msg, struct action *a)
{
  struct sip_msg *msg_src = msg;
  pv_spec_p iter, spec;
  pv_param_t pvp;
  pv_value_t val;
  int ret = 1;
  int op = 0;

  if (a->elem[2].type == ACTIONS_ST && a->elem[2].u.data) {
    iter = a->elem[0].u.data;
    spec = a->elem[1].u.data;

    /*
     * simple is always better.
     * just don't allow fancy for-each statements
     */
    if (spec->pvp.pvi.type != PV_IDX_ALL) {
      LM_ERR("for-each must be used on a \"[*]\" index! skipping!\n");
      return E_SCRIPT;
    }

    memset(&pvp, 0, sizeof pvp);
    pvp.pvi.type = PV_IDX_INT;
    pvp.pvn = spec->pvp.pvn;
    if (spec->pvc && spec->pvc->contextf) {
      msg_src = spec->pvc->contextf(msg);
      if (!msg_src || msg_src == FAKED_REPLY) {
        LM_BUG("Invalid pv context message: %p\n", msg_src);
        return E_BUG;
      }
    }

    /*
     * for $json iterators, better to assume script writer
     * wants data to be interpreted, rather than not
     *    (i.e. ":=" script operator, and not simply "=")
     */
    if (pv_type(iter->type) == PVT_JSON)
      op = COLONEQ_T;

    for (;;) {
      if (spec->getf(msg_src, &pvp, &val) != 0) {
        LM_ERR("failed to get spec value\n");
        return E_BUG;
      }

      if (val.flags & PV_VAL_NULL)
        break;

      if (iter->setf(msg, &iter->pvp, op, &val) != 0) {
        LM_ERR("failed to set scriptvar value\n");
        return E_BUG;
      }

      ret = run_action_list(
                    (struct action *)a->elem[2].u.data, msg);

      /* check for "return" statements or "0" retcodes */
      if (action_flags & (ACT_FL_RETURN | ACT_FL_EXIT | ACT_FL_BREAK)) {
        action_flags &= ~ACT_FL_BREAK;
        return ret;
      }

      pvp.pvi.u.ival++;
    }
  }

  return ret;
}

/**
 * prints the current point of execution in the OpenSIPS script
 *
 * @class - optional, string to be printed meaning the class of action (if any)
 * @action - mandatory, string with the name of action
 * @msg - mandatory, sip message
 * @line - line in script
 */
void __script_trace(const char *class, const char *action, struct sip_msg *msg,
  const char *file, int line)
{
  str val;

  if (pv_printf_s(msg, &script_trace_elem, &val) != 0) {
    LM_ERR("Failed to evaluate variables\n");
    return;
  }

  /* Also print extra info */
  if (script_trace_info) {
    LM_GEN1(script_trace_log_level, "[Script Trace][%s:%d][%s][%s %s]"\
      " -> (%.*s)\n", file, line, script_trace_info,
      class?class:"", action, val.len, val.s);
  } else {
    LM_GEN1(script_trace_log_level, "[Script Trace][%s:%d][%s %s]"\
      " -> (%.*s)\n", file, line,
      class?class:"", action, val.len, val.s);
  }
}

/**
 * functions used to populate $params() vars in the route_param structure
 */

void route_params_push_level(char *rt_name, void *params, void *extra, param_getf_t getf)
{
  route_rec_level++;
  route_params[route_rec_level].params = params;
  route_params[route_rec_level].extra = extra;
  route_params[route_rec_level].get_param = getf;

  if (rt_name) {
    route_stack[route_stack_size] = rt_name;
    route_stack_size++;
  }
}

void route_params_pop_level(void)
{
  route_rec_level--;
  route_stack_size--;
}

int route_params_run(struct sip_msg *msg,  pv_param_t *ip, pv_value_t *res)
{
  if (route_rec_level == -1)
  {
    LM_DBG("no parameter specified for this route\n");
    return pv_get_null(msg, ip, res);
  }

  return route_params[route_rec_level].get_param(msg, ip, res,
      route_params[route_rec_level].params,
      route_params[route_rec_level].extra);
}


static const char *_sip_msg_buf =
"DUMMY sip:user@dummy.com SIP/2.0\r\n"
"Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKdummy\r\n"
"To: <sip:to@dummy.com>\r\n"
"From: <sip:from@dummy.com>;tag=1\r\n"
"Call-ID: dummy-1\r\n"
"CSeq: 1 DUMMY\r\n\r\n";
static struct sip_msg* dummy_static_req= NULL;
static int dummy_static_in_used = 0;

int is_dummy_sip_msg(struct sip_msg *req)
{
  if (req && req->buf==_sip_msg_buf)
    return 0;
  return -1;
}

struct sip_msg* get_dummy_sip_msg(void)
{
  struct sip_msg* req;

  if (dummy_static_req == NULL || dummy_static_in_used) {
    /* if the static request is not yet allocated, or the static
     * request is already in used (nested calls?), we better allocate
     * a new structure */
    LM_DBG("allocating new sip msg\n");
    req = (struct sip_msg*)pkg_malloc(sizeof(struct sip_msg));
    if(req == NULL)
    {
      LM_ERR("No more memory\n");
      return NULL;
    }
    memset( req, 0, sizeof(struct sip_msg));

    req->buf = (char*)_sip_msg_buf;
    req->len = strlen(_sip_msg_buf);
    req->rcv.src_ip.af = AF_INET;
    req->rcv.dst_ip.af = AF_INET;

    parse_msg((char*)_sip_msg_buf, strlen(_sip_msg_buf), req);
    parse_headers( req, HDR_EOH_F, 0);
    if (dummy_static_req==NULL) {
      dummy_static_req = req;
      dummy_static_in_used = 1;
      LM_DBG("setting as static to %p\n",req);
    }
  } else {
    /* reuse the static request */
    req = dummy_static_req;
    LM_DBG("reusing the static sip msg %p\n",req);
  }

  return req;
}

void release_dummy_sip_msg( struct sip_msg* req)
{
  struct hdr_field* hdrs;

  if (req==dummy_static_req) {
    /* for the static request, just strip out the potential
     * changes (lumps, new_uri, dst_uri, etc), but keep the parsed
     * list of headers (this never changes) */
    LM_DBG("cleaning the static sip msg %p\n",req);
    hdrs = req->headers;
    req->headers = NULL;
    free_sip_msg(req);
    req->headers = hdrs;
    req->msg_cb = NULL;
    req->new_uri.s = req->dst_uri.s = req->path_vec.s = NULL;
    req->new_uri.len = req->dst_uri.len = req->path_vec.len = 0;
    req->set_global_address.s = req->set_global_port.s = NULL;
    req->set_global_address.len = req->set_global_port.len = 0;
    req->add_rm = req->body_lumps = NULL;
    req->reply_lump = NULL;
    req->ruri_q = Q_UNSPECIFIED;
    req->ruri_bflags = 0;
    req->force_send_socket = NULL;
    req->parsed_uri_ok = 0;
    req->parsed_orig_ruri_ok = 0;
    req->add_to_branch_len = 0;
    req->flags = 0;
    req->msg_flags = 0;
    memset( &req->time, 0, sizeof(struct timeval));
    dummy_static_in_used = 0;
  } else {
    LM_DBG("freeing allocated sip msg %p\n",req);
    /* is was an 100% allocated request */
    free_sip_msg(req);
    pkg_free(req);
  }
}

Coverage Report

Created: 2025-07-11 06:28