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report_utils.c

/* Nessus
 * Copyright (C) 1998, 1999 Renaud Deraison
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2,
 * as published by the Free Software Foundation
 *
 * This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * In addition, as a special exception, Renaud Deraison
 * gives permission to link the code of this program with any
 * version of the OpenSSL library which is distributed under a
 * license identical to that listed in the included COPYING.OpenSSL
 * file, and distribute linked combinations including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * this file, you may extend this exception to your version of the
 * file, but you are not obligated to do so.  If you do not wish to
 * do so, delete this exception statement from your version.
 */
#include <includes.h>
#include "report_utils.h"
 
 
/*-------------------------------------------------------------------*/
int 
safe_strcmp(a, b)
 char * a, * b;
{
 if(!a && !b)
  return 0;
 if(!a)
  return 1;
 else if(!b)
  return -1;
 else return strcmp(a, b);
}



 /*-------------------------------------------------------------------*/
 
 
 
int arglist_length(struct arglist * arg)
{
 if(!arg)return 0;
 return arg->next ? 1 + arglist_length(arg->next):0;
} 


/*
 * Auxilliary functions
 */
int number_of_notes_by_port(struct arglist * arg)
{ 
 if(!arg || !arg->next)return 0;
 else {
  struct arglist * notes = arg_get_value(arg->value, "NOTE");
  return arglist_length(notes) + number_of_notes_by_port(arg->next);
  }
}

int number_of_notes_by_host(struct arglist * arg)
{
 if(!arg || !arg->next)return 0;
 else return number_of_notes_by_port(arg->value) +
           number_of_notes_by_host(arg->next);       
}
 
int number_of_warnings_by_port(struct arglist * arg)
{ 
 if(!arg || !arg->next)return 0;
 else {
  struct arglist * warnings = arg_get_value(arg->value, "INFO");
  return arglist_length(warnings) + number_of_warnings_by_port(arg->next);
  }
}

int number_of_warnings_by_host(struct arglist * arg)
{
 if(!arg || !arg->next)return 0;
 else return number_of_warnings_by_port(arg->value) +
           number_of_warnings_by_host(arg->next);          
}
 

int number_of_holes_by_port(struct arglist * arg)
{ 
 if(!arg || !arg->next)return 0;
 else {
  struct arglist * holes = arg_get_value(arg->value, "REPORT");
  return arglist_length(holes) + number_of_holes_by_port(arg->next);
  }
}

int number_of_holes_by_host(struct arglist * arg)
{
 if(!arg || !arg->next)return 0;
 else return number_of_holes_by_port(arg->value) +
           number_of_holes_by_host(arg->next);       
}


int number_of_notes(struct arglist *  arg)
{
 if(!arg || !arg->next)return 0;
 else return number_of_notes_by_host(arg->value) + 
           number_of_notes(arg->next);
}

int number_of_warnings(struct arglist *  arg)
{
 if(!arg || !arg->next)return 0;
 else return number_of_warnings_by_host(arg->value) + 
           number_of_warnings(arg->next);
}

int number_of_holes(struct arglist * arg)
{
if(!arg ||!arg->next)return 0;
 else return number_of_holes_by_host(arg->value) + 
           number_of_holes(arg->next);
}

/*
 * The most dangerous host
 */
static struct arglist* sub_most_dangerous_host_holes(host, current, number)
      struct arglist * host;
      struct arglist * current;
      int number;
{
 if(!host || !host->next)return current;
 else 
 {
  int holes = number_of_holes_by_host(host->value);
  if(holes > number) return sub_most_dangerous_host_holes(host->next, host,
                                             holes);
      else return sub_most_dangerous_host_holes(host->next, current, number);
 }
}

static struct arglist* sub_most_dangerous_host_warnings(host, current, number)
      struct arglist * host;
      struct arglist * current;
      int number;
{
 if(!host || !host->next)return current;
 else 
 {
  int holes = number_of_warnings_by_host(host->value);
  if(holes > number) return sub_most_dangerous_host_warnings(host->next, host,
                                             holes);
      else return sub_most_dangerous_host_warnings(host->next, current, number);
 }
}

      
static struct arglist* sub_most_dangerous_host_notes(host, current, number)
      struct arglist * host;
      struct arglist * current;
      int number;
{
 if(!host || !host->next)return current;
 else 
 {
  int holes = number_of_notes_by_host(host->value);
  if(holes > number) return sub_most_dangerous_host_notes(host->next, host,
                                             holes);
      else return sub_most_dangerous_host_notes(host->next, current, number);
 }
}

struct arglist *most_dangerous_host(hosts)
 struct arglist * hosts;
{
 struct arglist * most = sub_most_dangerous_host_holes(hosts, NULL, 0);
 if(most)return most;
 most = sub_most_dangerous_host_warnings(hosts, NULL, 0);
 if(most)return most;
 else return sub_most_dangerous_host_notes(hosts, NULL, 0);
}


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