mirror of
https://github.com/nmap/nmap.git
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223 lines
10 KiB
C++
223 lines
10 KiB
C++
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/***************************************************************************
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* utils.h -- Various miscellaneous utility functions which defy *
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* categorization :) *
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* *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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* *
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* The Nmap Security Scanner is (C) 1996-2010 Insecure.Com LLC. Nmap is *
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* also a registered trademark of Insecure.Com LLC. This program is free *
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* software; you may redistribute and/or modify it under the terms of the *
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* GNU General Public License as published by the Free Software *
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* Foundation; Version 2 with the clarifications and exceptions described *
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* below. This guarantees your right to use, modify, and redistribute *
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* this software under certain conditions. If you wish to embed Nmap *
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* technology into proprietary software, we sell alternative licenses *
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* (contact sales@insecure.com). Dozens of software vendors already *
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* license Nmap technology such as host discovery, port scanning, OS *
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* detection, and version detection. *
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* *
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* Note that the GPL places important restrictions on "derived works", yet *
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* it does not provide a detailed definition of that term. To avoid *
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* misunderstandings, we consider an application to constitute a *
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* "derivative work" for the purpose of this license if it does any of the *
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* following: *
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* o Integrates source code from Nmap *
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* o Reads or includes Nmap copyrighted data files, such as *
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* nmap-os-db or nmap-service-probes. *
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* o Executes Nmap and parses the results (as opposed to typical shell or *
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* execution-menu apps, which simply display raw Nmap output and so are *
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* not derivative works.) *
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* o Integrates/includes/aggregates Nmap into a proprietary executable *
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* installer, such as those produced by InstallShield. *
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* o Links to a library or executes a program that does any of the above *
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* *
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* The term "Nmap" should be taken to also include any portions or derived *
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* works of Nmap. This list is not exclusive, but is meant to clarify our *
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* interpretation of derived works with some common examples. Our *
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* interpretation applies only to Nmap--we don't speak for other people's *
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* GPL works. *
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* *
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* If you have any questions about the GPL licensing restrictions on using *
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* Nmap in non-GPL works, we would be happy to help. As mentioned above, *
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* we also offer alternative license to integrate Nmap into proprietary *
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* applications and appliances. These contracts have been sold to dozens *
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* of software vendors, and generally include a perpetual license as well *
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* as providing for priority support and updates as well as helping to *
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* fund the continued development of Nmap technology. Please email *
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* sales@insecure.com for further information. *
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* *
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* As a special exception to the GPL terms, Insecure.Com LLC grants *
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* permission to link the code of this program with any version of the *
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* OpenSSL library which is distributed under a license identical to that *
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* listed in the included docs/licenses/OpenSSL.txt file, and distribute *
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* linked combinations including the two. You must obey the GNU GPL in all *
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* respects for all of the code used other than OpenSSL. If you modify *
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* this file, you may extend this exception to your version of the file, *
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* but you are not obligated to do so. *
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* *
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* If you received these files with a written license agreement or *
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* contract stating terms other than the terms above, then that *
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* alternative license agreement takes precedence over these comments. *
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* *
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* Source is provided to this software because we believe users have a *
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* right to know exactly what a program is going to do before they run it. *
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* This also allows you to audit the software for security holes (none *
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* have been found so far). *
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* *
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* Source code also allows you to port Nmap to new platforms, fix bugs, *
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* and add new features. You are highly encouraged to send your changes *
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* to nmap-dev@insecure.org for possible incorporation into the main *
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* distribution. By sending these changes to Fyodor or one of the *
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* Insecure.Org development mailing lists, it is assumed that you are *
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* offering the Nmap Project (Insecure.Com LLC) the unlimited, *
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* non-exclusive right to reuse, modify, and relicense the code. Nmap *
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* will always be available Open Source, but this is important because the *
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* inability to relicense code has caused devastating problems for other *
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* Free Software projects (such as KDE and NASM). We also occasionally *
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* relicense the code to third parties as discussed above. If you wish to *
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* specify special license conditions of your contributions, just say so *
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* when you send them. *
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* *
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* This program is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License v2.0 for more details at *
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* http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file *
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* included with Nmap. *
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* *
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***************************************************************************/
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/* $Id$ */
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#ifndef UTILS_H
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#define UTILS_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include "nmap.h"
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#ifdef WIN32
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#include "mswin32\winclude.h"
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#else
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#include <sys/types.h>
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#if HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#include <sys/mman.h>
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#include "nmap_config.h"
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <time.h>
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#else
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# if HAVE_SYS_TIME_H
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# include <sys/time.h>
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# else
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# include <time.h>
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# endif
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#endif
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#include "nbase.h"
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#include "nmap_error.h"
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#include "global_structures.h"
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/* Arithmatic difference modulo 2^32 */
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#ifndef MOD_DIFF
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#define MOD_DIFF(a,b) ((u32) (MIN((u32)(a) - (u32 ) (b), (u32 )(b) - (u32) (a))))
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#endif
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/* Arithmatic difference modulo 2^16 */
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#ifndef MOD_DIFF_USHORT
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#define MOD_DIFF_USHORT(a,b) ((MIN((unsigned short)((unsigned short)(a) - (unsigned short ) (b)), (unsigned short) ((unsigned short )(b) - (unsigned short) (a)))))
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#define NIPQUAD(addr) \
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(((addr) >> 0) & 0xff), \
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(((addr) >> 8) & 0xff), \
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(((addr) >> 16) & 0xff), \
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(((addr) >> 24) & 0xff)
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#define MAX_PARSE_ARGS 254 /* +1 for integrity checking + 1 for null term */
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/* Return num if it is between min and max. Otherwise return min or
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max (whichever is closest to num), */
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template<class T> T box(T bmin, T bmax, T bnum) {
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if (bmin > bmax)
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fatal("box(%d, %d, %d) called (min,max,num)", (int) bmin, (int) bmax, (int) bnum);
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// assert(bmin <= bmax);
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if (bnum >= bmax)
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return bmax;
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if (bnum <= bmin)
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return bmin;
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return bnum;
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}
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int wildtest(char *wild, char *test);
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void nmap_hexdump(unsigned char *cp, unsigned int length);
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/* Scramble the contents of an array*/
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void genfry(unsigned char *arr, int elem_sz, int num_elem);
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void shortfry(unsigned short *arr, int num_elem);
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/* Like the perl equivialent -- It removes the terminating newline from string
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IF one exists. It then returns the POSSIBLY MODIFIED string */
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char *chomp(char *string);
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// Send data to a socket, keep retrying until an error or the full length
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// is sent. Returns -1 if there is an error, or len if the full length was sent.
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int Send(int sd, const void *msg, size_t len, int flags);
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unsigned int gcd_n_uint(int nvals, unsigned int *val);
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int arg_parse(const char *command, char ***argv);
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void arg_parse_free(char **argv);
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/* Convert a string in the format of a roughly C-style string literal
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(e.g. can have \r, \n, \xHH escapes, etc.) into a binary string.
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This is done in-place, and the new (shorter or the same) length is
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stored in newlen. If parsing fails, NULL is returned, otherwise
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str is returned. */
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char *cstring_unescape(char *str, unsigned int *len);
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void bintohexstr(char *buf, int buflen, char *src, int srclen);
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#ifndef HAVE_STRERROR
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char *strerror(int errnum);
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#endif
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/* mmap() an entire file into the address space. Returns a pointer
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to the beginning of the file. The mmap'ed length is returned
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inside the length parameter. If there is a problem, NULL is
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returned, the value of length is undefined, and errno is set to
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something appropriate. The user is responsible for doing
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an munmap(ptr, length) when finished with it. openflags should
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be O_RDONLY or O_RDWR, or O_WRONLY
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*/
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char *mmapfile(char *fname, int *length, int openflags);
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#ifdef WIN32
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int win32_munmap(char *filestr, int filelen);
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#endif /* WIN32 */
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#endif /* UTILS_H */
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