nbase.h

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/***************************************************************************
 * nbase.h -- The main include file exposing the external API for          *
 * libnbase, a library of base (often compatability) routines.  Programs   *
 * using libnbase can guarantee the availability of functions like         *
 * (v)snprintf and inet_pton.  This library also provides consistency and  *
 * extended features for some functions.  It was originally written for    *
 * use in the Nmap Security Scanner ( http://www.insecure.org/nmap/ ).     *
 *                                                                         *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2008 Insecure.Com LLC. Nmap is    *
 * also a registered trademark of Insecure.Com LLC.  This program is free  *
 * software; you may redistribute and/or modify it under the terms of the  *
 * GNU General Public License as published by the Free Software            *
 * Foundation; Version 2 with the clarifications and exceptions described  *
 * below.  This guarantees your right to use, modify, and redistribute     *
 * this software under certain conditions.  If you wish to embed Nmap      *
 * technology into proprietary software, we sell alternative licenses      *
 * (contact [e-mail]).  Dozens of software vendors already       *
 * license Nmap technology such as host discovery, port scanning, OS       *
 * detection, and version detection.                                       *
 *                                                                         *
 * Note that the GPL places important restrictions on "derived works", yet *
 * it does not provide a detailed definition of that term.  To avoid       *
 * misunderstandings, we consider an application to constitute a           *
 * "derivative work" for the purpose of this license if it does any of the *
 * following:                                                              *
 * o Integrates source code from Nmap                                      *
 * o Reads or includes Nmap copyrighted data files, such as                *
 *   nmap-os-fingerprints or nmap-service-probes.                          *
 * o Executes Nmap and parses the results (as opposed to typical shell or  *
 *   execution-menu apps, which simply display raw Nmap output and so are  *
 *   not derivative works.)                                                * 
 * o Integrates/includes/aggregates Nmap into a proprietary executable     *
 *   installer, such as those produced by InstallShield.                   *
 * o Links to a library or executes a program that does any of the above   *
 *                                                                         *
 * The term "Nmap" should be taken to also include any portions or derived *
 * works of Nmap.  This list is not exclusive, but is just meant to        *
 * clarify our interpretation of derived works with some common examples.  *
 * These restrictions only apply when you actually redistribute Nmap.  For *
 * example, nothing stops you from writing and selling a proprietary       *
 * front-end to Nmap.  Just distribute it by itself, and point people to   *
 * http://insecure.org/nmap/ to download Nmap.                             *
 *                                                                         *
 * We don't consider these to be added restrictions on top of the GPL, but *
 * just a clarification of how we interpret "derived works" as it applies  *
 * to our GPL-licensed Nmap product.  This is similar to the way Linus     *
 * Torvalds has announced his interpretation of how "derived works"        *
 * applies to Linux kernel modules.  Our interpretation refers only to     *
 * Nmap - we don't speak for any other GPL products.                       *
 *                                                                         *
 * If you have any questions about the GPL licensing restrictions on using *
 * Nmap in non-GPL works, we would be happy to help.  As mentioned above,  *
 * we also offer alternative license to integrate Nmap into proprietary    *
 * applications and appliances.  These contracts have been sold to dozens  *
 * of software vendors, and generally include a perpetual license as well  *
 * as providing for priority support and updates as well as helping to     *
 * fund the continued development of Nmap technology.  Please email        *
 * [e-mail] for further information.                             *
 *                                                                         *
 * As a special exception to the GPL terms, Insecure.Com LLC grants        *
 * 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 GPL 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 received these files with a written license agreement or         *
 * contract stating terms other than the terms above, then that            *
 * alternative license agreement takes precedence over these comments.     *
 *                                                                         *
 * Source is provided to this software because we believe users have a     *
 * right to know exactly what a program is going to do before they run it. *
 * This also allows you to audit the software for security holes (none     *
 * have been found so far).                                                *
 *                                                                         *
 * Source code also allows you to port Nmap to new platforms, fix bugs,    *
 * and add new features.  You are highly encouraged to send your changes   *
 * to [e-mail] for possible incorporation into the main         *
 * distribution.  By sending these changes to Fyodor or one the            *
 * Insecure.Org development mailing lists, it is assumed that you are      *
 * offering Fyodor and Insecure.Com LLC the unlimited, non-exclusive right *
 * to reuse, modify, and relicense the code.  Nmap will always be          *
 * available Open Source, but this is important because the inability to   *
 * relicense code has caused devastating problems for other Free Software  *
 * projects (such as KDE and NASM).  We also occasionally relicense the    *
 * code to third parties as discussed above.  If you wish to specify       *
 * special license conditions of your contributions, just say so when you  *
 * send them.                                                              *
 *                                                                         *
 * 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 at                              *
 * http://www.gnu.org/copyleft/gpl.html , or in the COPYING file included  *
 * with Nmap.                                                              *
 *                                                                         *
 ***************************************************************************/

/* $Id: nbase.h 6636 2007-12-22 06:32:28Z fyodor $ */

#ifndef NBASE_H
#define NBASE_H

/* NOTE -- libnbase offers the following features that you should probably
 * be aware of:
 *
 * * 'inline' is defined to what is neccessary for the C compiler being
 *   used (which may be nothing)
 *
 * * snprintf, inet_pton, memcpy, and bzero are 
 *   provided if you don't have them (prototypes for these are 
 *   included either way).
 *
 * * WORDS_BIGENDIAN is defined if platform is big endian
 *
 * * Definitions included which give the operating system type.  They
 *   will generally be one of the following: LINUX, FREEBSD, NETBSD,
 *   OPENBSD, SOLARIS, SUNOS, BSDI, IRIX, NETBSD
 *
 * * Insures that getopt_* functions exist (such as getopt_long_only)
 *
 * * Various string functions such as Strncpy() and strcasestr() see protos 
 *   for more info.
 *
 * * IPv6 structures like 'sockaddr_storage' are provided if they do
 *   not already exist.
 *
 * * Various Windows -> UNIX compatability definitions are added (such as defining EMSGSIZE to WSAEMSGSIZE)
 */

#if HAVE_CONFIG_H
#include "nbase_config.h"
#else
#ifdef WIN32
#include "nbase_winconfig.h"
#endif /* WIN32 */
#endif /* HAVE_CONFIG_H */

#ifdef WIN32
#include "nbase_winunix.h"
#endif

#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif

#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <stdlib.h>
#include <ctype.h>
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#if HAVE_STRING_H
#include <string.h>
#endif

#if HAVE_NETDB_H
#include <netdb.h>  
#endif

#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif

#ifndef MAXPATHLEN
#define MAXPATHLEN 2048
#endif

#ifndef HAVE___ATTRIBUTE__
#define __attribute__(args)
#endif

#include <stdarg.h>

/* Integer widths */
#if (SIZEOF_CHAR == 1)
typedef unsigned char u8;
#else
typedef u_int8_t u8;
#endif

#if (SIZEOF_SHORT == 2)
typedef unsigned short u16;
typedef short s16;
#elif (SIZEOF_CHAR == 2)
typedef unsigned char u16;
typedef char s16;
#else
typedef u_int16_t u16;
typedef int16_t s16;
#endif

#if (SIZEOF_SHORT == 4)
typedef unsigned short u32;
typedef short s32;
#elif (SIZEOF_INT == 4)
typedef unsigned int u32;
typedef int s32;
#elif (SIZEOF_LONG == 4)
typedef unsigned long u32;
typedef long s32;
#else
typedef u_int32_t u32;
typedef int32_t s32;
#endif