fraud_detection: Add coverity tag and cast time_t

CID #417467, #417548, #417553, #417570, #417667, #417684,
    #417723, #417807, #417829, #417703, #417490

modules/fraud_detection/fraud_detection.c

@@ -361,7 +361,7 @@ static int check_fraud(struct sip_msg *msg, str *user, str *number, int *pid)
  /* more than t0 + WINDOW_SIZE but less than 2 * WINDOW_SIZE
  * we can consider calls from t0 + (now - WINDOW_SIZE)
  * all cals from t0 to t0 + (now - WINDOW_SIZE) shall be invalidated */
- unsigned int old_matched_time = se->stats.last_matched_time;
+ unsigned int old_matched_time = (unsigned int)(unsigned long)se->stats.last_matched_time;
 
  se->stats.last_matched_time = nowt - FRD_SECS_PER_WINDOW + 1;
 
@@ -394,13 +394,21 @@ static int check_fraud(struct sip_msg *msg, str *user, str *number, int *pid)
  rc = rc_ ## type ## _thr;\
  }
 
+ /* coverity[overrun-buffer-val: FALSE] */
  if CHECK_AND_RAISE(cpm, critical)
+ /* coverity[overrun-buffer-val: FALSE] */
  else if CHECK_AND_RAISE(total_calls, critical)
+ /* coverity[overrun-buffer-val: FALSE] */
  else if CHECK_AND_RAISE(concurrent_calls, critical)
+ /* coverity[overrun-buffer-val: FALSE] */
  else if CHECK_AND_RAISE(seq_calls, critical)
+ /* coverity[overrun-buffer-val: FALSE] */
  else if CHECK_AND_RAISE(cpm, warning)
+ /* coverity[overrun-buffer-val: FALSE] */
  else if CHECK_AND_RAISE(total_calls, warning)
+ /* coverity[overrun-buffer-val: FALSE] */
  else if CHECK_AND_RAISE(concurrent_calls, warning)
+ /* coverity[overrun-buffer-val: FALSE] */
  else if CHECK_AND_RAISE(seq_calls, warning);
 
 #undef CHECK_AND_RAISE

modules/fraud_detection/frd_events.c

@@ -164,12 +164,16 @@ void dialog_terminate_CB(struct dlg_cell *dlg, int type,
  /* avoid generating alerts on CANCEL/487 calls, but decrement the CC */
  if (!(type & DLGCB_FAILED) && frdparam->calldur_crit
  && duration >= frdparam->calldur_crit)
+
+ /* coverity[overrun-buffer-val: FALSE] */
  raise_critical_event(&call_dur_name, &duration,
  &frdparam->calldur_crit,
  &frdparam->user, &frdparam->number, &frdparam->ruleid, &frdparam->pid);
 
  else if (!(type & DLGCB_FAILED) && frdparam->calldur_warn
  && duration >= frdparam->calldur_warn)
+
+ /* coverity[overrun-buffer-val: FALSE] */
  raise_warning_event(&call_dur_name, &duration,
  &frdparam->calldur_warn,
  &frdparam->user, &frdparam->number, &frdparam->ruleid, &frdparam->pid);