ServiceGroup.cc

/***************************************************************************
 * ServiceGroup.cc -- The "ServiceGroup" class holds lists for all         *
 * services that are under active cracking or have been stalled for one    *
 * reason or another. Information and options that apply to all services   *
 * as a whole are also kept here.                                          *
 *                                                                         *
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 ***************************************************************************/
 

#include "ServiceGroup.h"
#include "NcrackOps.h"

extern NcrackOps o;


ServiceGroup::
ServiceGroup()
{
	/* members initialization */
	total_services = 0;
	active_connections = 0;
  connections_total = 0;
  connections_timedout = 0;
  connections_closed = 0;
  credentials_found = 0;
  SPM = new ScanProgressMeter();
}


ServiceGroup::
~ServiceGroup()
{
	// free stuff
}


/* 
 * Find and set minimum connection delay from all unfinished services 
 */
void ServiceGroup::
findMinDelay(void)
{
  list<long> delays;
  list<Service *>::iterator li;

  for (li = services_all.begin(); li != services_all.end(); li++) {
    /* Append to temporary list only the unfinished services */
    if (!(*li)->getListFinished())
      delays.push_back((*li)->connection_delay);
  }

  delays.sort();
  min_connection_delay = delays.front();
  delays.clear();
}


/* 
 * Pushes service into one of the ServiceGroup lists. A Service might belong:
 * a) to 'services_active' OR
 * b) to 'services_finished' OR
 * c) to any other combination of the rest of the lists
 * A service might belong to more than one of the lists in case c) when
 * for example it needs to wait both for the 'connection_delay' and the 
 * 'connection_limit'.
 */
list <Service *>::iterator ServiceGroup::
pushServiceToList(Service *serv, list <Service *> *dst)
{
  list <Service *>::iterator li = services_active.end();
  list <Service *>::iterator templi;
  const char *dstname = NULL;

  assert(dst);
  assert(serv);

  /* Check that destination list is valid and that service doesn't already
   * belong to it. */
  if (!set_servlist(serv, dst) || !(dstname = list2name(dst)))
    return li;

  /* 
   * If service belonged to 'services_active' then we also have to remove it
   * from there. In any other case, we just copy the service to the list
   * indicated by 'dst'.
   */
  if (serv->getListActive()) {
    for (li = services_active.begin(); li != services_active.end(); li++) {
      if (((*li)->portno == serv->portno) && (!strcmp((*li)->name, serv->name)) 
          && (!(strcmp((*li)->target->NameIP(), serv->target->NameIP()))))
        break;
    }
    if (li == services_active.end())
      fatal("%s: %s service not found in 'services_active' as indicated by "
          "'getListActive()'!\n", __func__, serv->HostInfo());

    serv->unsetListActive();
    li = services_active.erase(li);
  }

  /* 
   * Now append service to destination list. The service can still be in other
   * lists too. However, if we move it to 'services_finished', then no other
   * action can happen on it. We also can never move a service to
   * 'services_active' by  this way. The service must stop being in any other
   * list before finally being moved back to 'services_active' and this only
   * happens through 'popServiceFromList()'.
   */

  if (dst == &services_active) {
    if (o.debugging > 8)
      error("%s cannot be pushed into 'services_active'.This is not allowed!\n",
          serv->HostInfo());
  }

  dst->push_back(serv);
  if (o.debugging > 8)
    log_write(LOG_STDOUT, "%s pushed to list %s\n", serv->HostInfo(), dstname);

  // TODO: probably we should also remove from any other list too, if service
  // is finished.

  free((char *)dstname);
  return li;
}


/* 
 * Pops service from one of the ServiceGroup lists. This is the only way for a
 * service to return back to 'services_active' and this happens if and only if
 * it stops belonging to any other list (except 'services_finished' from which
 * you are not allowed to remove a service once it moves there)
 */
list <Service *>::iterator ServiceGroup::
popServiceFromList(Service *serv, list <Service *> *src)
{
  list <Service *>::iterator li = services_finished.end();
  const char *srcname = NULL;

  assert(src);
  assert(serv);

  if (src == &services_active) {
    if (o.debugging > 8)
      error("%s cannot be popped from 'services_active'.This is not allowed!\n",
          serv->HostInfo());
  }  

  /* unset corresponding boolean for service's list - If operation is invalid
   * then return immediately (with null iterator) */
  if (!unset_servlist(serv, src) || !(srcname = list2name(src)))
    return li;

  for (li = src->begin(); li != src->end(); li++) {
    if (((*li)->portno == serv->portno) && (!strcmp((*li)->name, serv->name)) 
        && (!(strcmp((*li)->target->NameIP(), serv->target->NameIP()))))
      break;
  }
  if (li == src->end())
    fatal("%s: %s service was not found in %s and thus cannot be popped!\n",
        __func__, serv->HostInfo(), srcname);

  /* 
   * If service now doesn't belong to any other list other than
   * 'services_active' then we can move them back there!
   */
  if (!serv->getListWait() && !serv->getListPairfini() &&
      !serv->getListFull() && !serv->getListFinishing() &&
      !serv->getListFinished()) {
    serv->setListActive();
    services_active.push_back(serv);
  }

  li = src->erase(li);
  if (o.debugging > 8)
    log_write(LOG_STDOUT, "%s popped from list %s\n",
        serv->HostInfo(), srcname);


  free((char *)srcname);
  return li;
}


/*
 * Returns list's equivalent name. e.g for 'services_finished' it will return
 * a "FINISHED" string. We prefer capitals for debugging purposes. Caller must
 * free the string after it finishes using it.
 */
const char *ServiceGroup::
list2name(list <Service *> *list)
{
  const char *name = NULL;

  if (list == &services_active)
    name = Strndup("ACTIVE", sizeof("ACTIVE") - 1);
  else if (list == &services_wait)
    name = Strndup("WAIT", sizeof("WAIT") - 1);
  else if (list == &services_pairfini)
    name = Strndup("PAIRFINI", sizeof("PAIRFINI") - 1);
  else if (list == &services_full)
    name = Strndup("FULL", sizeof("FULL") - 1);
  else if (list == &services_finishing)
    name = Strndup("FINISHING", sizeof("FINISHING") - 1);
  else if (list == &services_finished)
    name = Strndup("FINISHED", sizeof("FINISHED") - 1);
  else
    error("%s Invalid list specified!\n", __func__);

  return name;
}


/* 
 * Set service's corresponding boolean indicating that it now
 * belongs to the particular list. If service is already on the list or an
 * invalid list is specified, then the operation is invalid. 
 * Returns true if operation is valid and false for invalid.
 */
bool ServiceGroup::
set_servlist(Service *serv, list <Service *> *list)
{
  if (list == &services_active && !serv->getListActive())
    serv->setListActive();
  else if (list == &services_wait && !serv->getListWait())
    serv->setListWait();
  else if (list == &services_pairfini && !serv->getListPairfini())
    serv->setListPairfini();
  else if (list == &services_full && !serv->getListFull())
    serv->setListFull();
  else if (list == &services_finishing && !serv->getListFinishing())
    serv->setListFinishing();
  else if (list == &services_finished && !serv->getListFinished())
    serv->setListFinished();
  else
    return false;

  return true;
}


/* 
 * Unset service's corresponding boolean indicating that it stops
 * belonging to the particular list.
 * Returns true if operation is valid.
 */
bool ServiceGroup::
unset_servlist(Service *serv, list <Service *> *list)
{
  if (list == &services_active)
    serv->unsetListActive();
  else if (list == &services_wait)
    serv->unsetListWait();
  else if (list == &services_pairfini)
    serv->unsetListPairfini();
  else if (list == &services_full)
    serv->unsetListFull();
  else if (list == &services_finishing)
    serv->unsetListFinishing();
  else if (list == &services_finished) {
    if (o.debugging > 8)
      error("%s cannot remove from 'services_finished'.This is not allowed!\n",
          __func__);
    return false;
  } else {
    error("%s destination list invalid!\n", __func__);
    return false;
  }
  return true;
}


double ServiceGroup::
getCompletionFraction(void)
{
  double total = 0;
  unsigned int services_left = 0;

  list <Service *>::iterator li;

  for (li = services_all.begin(); li != services_all.end(); li++) {
    if ((*li)->getListFinished())
      continue;
    services_left++;
    total += (*li)->getPercDone();
  }

  if (total)
    total /= (double)services_left;
  else 
    total = 0;
  return total;
}