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https://github.com/nmap/nmap.git
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224 lines
8.7 KiB
C
224 lines
8.7 KiB
C
/***************************************************************************
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* sys_wrap.c -- Error-checked wrappers around common functions. *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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* *
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* The Nmap Security Scanner is (C) 1996-2012 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, version detection, and the Nmap Scripting Engine. *
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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 interpret that term as broadly as copyright law *
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* allows. For example, 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, as well as other software we distribute under this *
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* license such as Zenmap, Ncat, and Nping. This list is not exclusive, *
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* but is meant to clarify our interpretation of derived works with some *
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* common examples. Our interpretation applies only to Nmap--we don't *
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* speak for other people's 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. They also fund the *
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* continued development of Nmap. Please email sales@insecure.com for *
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* 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, or checking them into the Nmap *
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* source code repository, it is understood (unless you specify otherwise) *
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* that you are offering the Nmap Project (Insecure.Com LLC) the *
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* unlimited, non-exclusive right to reuse, modify, and relicense the *
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* code. Nmap will always be available Open Source, but this is important *
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* because the inability to relicense code has caused devastating problems *
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* for other Free Software projects (such as KDE and NASM). We also *
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* occasionally relicense the code to third parties as discussed above. *
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* If you wish to specify special license conditions of your *
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* contributions, just say so 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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#include <limits.h>
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#include "sys_wrap.h"
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#include "util.h"
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void *Calloc(size_t nmemb, size_t size)
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{
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void *ret;
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/* older libcs don't check for int overflow */
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smul(nmemb, size);
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ret = calloc(nmemb, size);
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if (ret == NULL)
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die("calloc");
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return ret;
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}
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int Close(int fd)
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{
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if (close(fd) < 0)
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die("close");
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return 0;
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}
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int Connect(int sockfd, const struct sockaddr *serv_addr, socklen_t addrlen)
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{
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if (connect(sockfd, serv_addr, addrlen) < 0)
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die("connect");
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return 0;
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}
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int Dup2(int oldfd, int newfd)
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{
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int ret;
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ret = dup2(oldfd, newfd);
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if (ret < 0)
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die("dup2");
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return ret;
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}
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int Listen(int s, int backlog)
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{
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if (listen(s, backlog) < 0)
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die("listen");
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return 0;
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}
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int Open(const char *pathname, int flags, mode_t mode)
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{
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int ret;
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ret = open(pathname, flags, mode);
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if (ret < 0)
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die("open");
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return ret;
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}
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ssize_t Read(int fd, void *buf, size_t count)
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{
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ssize_t ret;
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ret = read(fd, buf, count);
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if (ret < 0)
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die("read");
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return ret;
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}
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int Setsockopt(int s, int level, int optname, const void *optval,
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socklen_t optlen)
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{
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int ret;
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ret = setsockopt(s, level, optname, (const char *) optval, optlen);
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if (ret < 0)
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die("setsockopt");
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return ret;
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}
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sighandler_t Signal(int signum, sighandler_t handler)
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{
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sighandler_t ret;
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ret = signal(signum, handler);
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if (ret == SIG_ERR)
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die("signal");
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return ret;
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}
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int Socket(int domain, int type, int protocol)
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{
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int ret;
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ret = socket(domain, type, protocol);
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if (ret < 0)
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die("socket");
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return ret;
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}
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char *Strdup(const char *s)
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{
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char *ret;
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ret = strdup(s);
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if (ret == NULL)
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die("strdup");
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return ret;
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}
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ssize_t Write(int fd, const void *buf, size_t count)
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{
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ssize_t ret = write(fd, buf, count);
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if (ret < 0) /* we don't bail if < count bytes written */
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die("write");
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return ret;
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}
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