/*************************************************************************** * utils.cc -- Miscellanious utils that didn't fit into any of the other * * source files. * * * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2012 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 sales@insecure.com). Dozens of software vendors already * * license Nmap technology such as host discovery, port scanning, OS * * detection, version detection, and the Nmap Scripting Engine. * * * * 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 interpret that term as broadly as copyright law * * allows. For example, 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-db 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, as well as other software we distribute under this * * license such as Zenmap, Ncat, and Nping. This list is not exclusive, * * but is meant to clarify our interpretation of derived works with some * * common examples. Our interpretation applies only to Nmap--we don't * * speak for other people's GPL works. * * * * 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. They also fund the * * continued development of Nmap. Please email sales@insecure.com 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 docs/licenses/OpenSSL.txt 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 the dev@nmap.org mailing list for possible incorporation into the * * main distribution. By sending these changes to Fyodor or one of the * * Insecure.Org development mailing lists, or checking them into the Nmap * * source code repository, it is understood (unless you specify otherwise) * * that you are offering the Nmap Project (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 Nmap * * license file for more details (it's in a COPYING file included with * * Nmap, and also available from https://svn.nmap.org/nmap/COPYING * * * ***************************************************************************/ #include "nping.h" #include "utils.h" #include "NpingOps.h" #include "global_structures.h" #include "output.h" #include "nbase.h" #include "pcap.h" #include "dnet.h" #include #include extern NpingOps o; /** Returns true if "source" contains at least one instance of "substring" */ bool contains(const char *source, const char *substring){ if(source==NULL || substring==NULL ) outFatal(QT_3,"contains(): NULL value received."); if( strcasestr(source, substring) ) return true; else return false; } /* End of contains() */ /** Returns true if the supplied string matches "rand" or "random" (not case * sensitive)*/ bool meansRandom(const char *source){ if(source==NULL) outFatal(QT_3,"meansRandom(): NULL value received."); if( !strcasecmp(source, "rand") || !strcasecmp(source, "random") ) return true; else return false; } /* End of meansRandom() */ /** Returns true if source contains the representation of a number >= min and * <= max in the given base (with nothing following). */ static bool isNumber_range(const char *source, int base, unsigned long min, unsigned long max){ unsigned long ul; char *tail; errno = 0; ul = strtoul(source, &tail, base); if (errno != 0 || tail == source || *tail != '\0') return false; return ul >= min && ul <= max; } /** Returns true if "source" is a number in the supplied base that can fit * into a 8-bit var */ bool isNumber_u8(const char *source, int base){ return isNumber_range(source, base, 0UL, 0xFFUL); } /** Returns true if "source" is a number in the supplied base that can fit * into a 16-bit var */ bool isNumber_u16(const char *source, int base){ return isNumber_range(source, base, 0UL, 0xFFFFUL); } /** Returns true if "source" is a number in the supplied base that can fit * into a 32-bit var */ bool isNumber_u32(const char *source, int base){ return isNumber_range(source, base, 0UL, 0xFFFFFFFFUL); } /** Returns a buffer that contains the binary equivalent to the supplied * hex spec or NULL in case of error. * @warning Returned pointer points to a static buffer that subsequent calls * will overwrite. */ u8 *parseBufferSpec(char *str, size_t *outlen){ char auxbuff[1024]; static u8 dst[16384]; size_t dstlen=16384; unsigned int i=0, j=0; char *start=NULL; if(str==NULL || outlen==NULL) return NULL; /* This catches the empty string possibility "" */ if(strlen(str) == 0) return NULL; else memset(auxbuff,0,1024); /* String should be treated as a hex number in this format: 0xAABBCCDDEE... * We process it the way it is specified, we don't perform byte order * conversions so if the users says 0x00AA we write dst[0]=0x00, dst[1]==0xAA * no matter the endianness of the host system. */ if( !strncmp("0x", str, 2) ){ /* This catches the case of an empty "0x" */ if(strlen(str) == 2) return NULL; start=str+2; } /* String should be treated as list of hex char in this format: \x00\xFF\x0A*/ else if( !strncmp("\\x", str, 2) ){ /* This catches the case of an empty "\x" */ if(strlen(str) == 2) return NULL; /* Copy all interesting bytes to an aux array, discard "\x" */ for(i=0; i= min && result <= max) { *dst = result; return OP_SUCCESS; } else { return OP_FAILURE; } } /* End of parse_number() */ /** Takes a string representing an 8-bit number and converts it into an * actual integer. The result is stored in memory area pointed by * "dstbuff". Returns OP_SUCCESS if conversion was successful or * OP_FAILURE in case of error.*/ int parse_u8(const char *str, u8 *dst){ unsigned long ul; int ret; ret = parse_unsigned_number(str, 0UL, 0xffUL, &ul); if (ret == OP_SUCCESS) *dst = ul; return ret; } /** Takes a string representing a 16-bit number and converts it into an * actual integer. The result is stored in memory area pointed by * "dstbuff". Returns OP_SUCCESS if conversion was successful or * OP_FAILURE in case of error.*/ int parse_u16(const char *str, u16 *dst){ unsigned long ul; int ret; ret = parse_unsigned_number(str, 0UL, 0xffffUL, &ul); if (ret == OP_SUCCESS) *dst = ul; return ret; } /** Takes a string representing a 32-bit number and converts it into an * actual integer. The result is stored in memory area pointed by * "dstbuff". Returns OP_SUCCESS if conversion was successful or * OP_FAILURE in case of error.*/ int parse_u32(const char *str, u32 *dst){ unsigned long ul; int ret; ret = parse_unsigned_number(str, 0UL, 0xffffffffUL, &ul); if (ret == OP_SUCCESS) *dst = ul; return ret; } /** Prints the hexadecimal dump of the supplied buffer to standard output */ int print_hexdump(int level, const u8 *cp, u32 length){ char *str = hexdump(cp, length); if(str==NULL) return OP_FAILURE; outPrint(level, "%s", str); free(str); return OP_SUCCESS; } /* End of print_hexdump() */