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nmap/ncat/ncat.h

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/***************************************************************************
* ncat.h *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2013 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 ("GPL"), BUT ONLY WITH ALL OF THE CLARIFICATIONS *
* AND EXCEPTIONS DESCRIBED HEREIN. 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@nmap.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 "derivative 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 with any software or content covered by this license *
* ("Covered Software"): *
* *
* o Integrates source code from Covered Software. *
* *
* o Reads or includes copyrighted data files, such as Nmap's nmap-os-db *
* or nmap-service-probes. *
* *
* o Is designed specifically to execute Covered Software and parse the *
* results (as opposed to typical shell or execution-menu apps, which will *
* execute anything you tell them to). *
* *
* o Includes Covered Software in a proprietary executable installer. The *
* installers produced by InstallShield are an example of this. Including *
* Nmap with other software in compressed or archival form does not *
* trigger this provision, provided appropriate open source decompression *
* or de-archiving software is widely available for no charge. For the *
* purposes of this license, an installer is considered to include Covered *
* Software even if it actually retrieves a copy of Covered Software from *
* another source during runtime (such as by downloading it from the *
* Internet). *
* *
* o Links (statically or dynamically) to a library which does any of the *
* above. *
* *
* o Executes a helper program, module, or script to do any of the above. *
* *
* This list is not exclusive, but is meant to clarify our interpretation *
* of derived works with some common examples. Other people may interpret *
* the plain GPL differently, so we consider this a special exception to *
* the GPL that we apply to Covered Software. Works which meet any of *
* these conditions must conform to all of the terms of this license, *
* particularly including the GPL Section 3 requirements of providing *
* source code and allowing free redistribution of the work as a whole. *
* *
* As another 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. *
* *
* Any redistribution of Covered Software, including any derived works, *
* must obey and carry forward all of the terms of this license, including *
* obeying all GPL rules and restrictions. For example, source code of *
* the whole work must be provided and free redistribution must be *
* allowed. All GPL references to "this License", are to be treated as *
* including the terms and conditions of this license text as well. *
* *
* Because this license imposes special exceptions to the GPL, Covered *
* Work may not be combined (even as part of a larger work) with plain GPL *
* software. The terms, conditions, and exceptions of this license must *
* be included as well. This license is incompatible with some other open *
* source licenses as well. In some cases we can relicense portions of *
* Nmap or grant special permissions to use it in other open source *
* software. Please contact fyodor@nmap.org with any such requests. *
* Similarly, we don't incorporate incompatible open source software into *
* Covered Software without special permission from the copyright holders. *
* *
* If you have any questions about the licensing restrictions on using *
* Nmap in other works, are 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@nmap.com for further *
* information. *
* *
* If you have received a written license agreement or contract for *
* Covered Software stating terms other than these, you may choose to use *
* and redistribute Covered Software under those terms instead of these. *
* *
* 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 *
* *
***************************************************************************/
/* $Id$ */
#ifndef NCAT_H_
#define NCAT_H_
#include "ncat_config.h"
#include <nbase.h>
#ifdef HAVE_OPENSSL
#include <openssl/ssl.h>
#endif
#include "nsock.h"
#include "util.h"
#include "sys_wrap.h"
#include "ncat_connect.h"
#include "ncat_core.h"
#include "ncat_exec.h"
#include "ncat_listen.h"
#include "ncat_proxy.h"
#include "ncat_ssl.h"
/* Ncat information for output, etc. */
#define NCAT_NAME "Ncat"
#define NCAT_URL "http://nmap.org/ncat"
#define NCAT_VERSION "6.45"
#ifndef __GNUC__
#ifndef __attribute__
#define __attribute__(x)
#endif
#endif
#define SOCKS_BUFF_SIZE 512
/* structs */
#ifdef WIN32
#pragma pack(1)
#endif
struct socks4_data {
char version;
char type;
unsigned short port;
uint32_t address;
char data[SOCKS_BUFF_SIZE]; // this has to be able to hold FQDN and username
} __attribute__((packed));
struct socks5_connect {
char ver;
char nmethods;
char methods[3];
} __attribute__((packed));
struct socks5_auth {
char ver; // must be always 1
char data[SOCKS_BUFF_SIZE];
} __attribute__((packed));
struct socks5_request {
char ver;
char cmd;
char rsv;
char atyp;
char dst[SOCKS_BUFF_SIZE]; // addr/name and port info
} __attribute__((packed));
#ifdef WIN32
#pragma pack()
#endif
/* defines */
/* Client-mode timeout for reads, infinite */
#define DEFAULT_READ_TIMEOUT -1
/* Client-mode timeout for writes, in msecs */
#define DEFAULT_WRITE_TIMEOUT 2000
/* Client-mode timeout for connection establishment, in msecs */
#define DEFAULT_CONNECT_TIMEOUT 10000
/* The default length of Ncat buffers */
#define DEFAULT_BUF_LEN (1024)
#define DEFAULT_TCP_BUF_LEN (1024 * 8)
#define DEFAULT_UDP_BUF_LEN (1024 * 128)
/* Default Ncat port */
#define DEFAULT_NCAT_PORT 31337
/* Default port for SOCKS4 */
#define DEFAULT_SOCKS4_PORT 1080
/* Default port for SOCKS5 */
#define DEFAULT_SOCKS5_PORT 1080
/* The default port Ncat will connect to when trying to connect to an HTTP
* proxy server. The current setting is the default for squid and probably
* other HTTP proxies. But it may also be 8080, 8888, etc.
*/
#define DEFAULT_PROXY_PORT 3128
/* Listen() backlog */
#define BACKLOG 10
/* The default maximum number of simultaneous connections Ncat will accept to
* a listening port. You may want to increase or decrease this value depending
* on your specific needs.
*/
#ifdef WIN32
/* Windows is commonly limited to 64 sockets, so keep the default somewhat below
that. http://www.tangentsoft.net/wskfaq/advanced.html#64sockets */
#define DEFAULT_MAX_CONNS 60
#else
#define DEFAULT_MAX_CONNS 100
#endif
/* SOCKS4 protocol responses */
#define SOCKS4_VERSION 4
#define SOCKS_CONNECT 1
#define SOCKS_BIND 2
#define SOCKS4_CONN_ACC 90 /* woot */
#define SOCKS4_CONN_REF 91
#define SOCKS4_CONN_IDENT 92
#define SOCKS4_CONN_IDENTDIFF 93
/* SOCKS5 protocol */
#define SOCKS5_VERSION 5
#define SOCKS5_AUTH_NONE 0
#define SOCKS5_AUTH_GSSAPI 1
#define SOCKS5_AUTH_USERPASS 2
#define SOCKS5_AUTH_FAILED 255
#define SOCKS5_ATYP_IPv4 1
#define SOCKS5_ATYP_NAME 3
#define SOCKS5_ATYP_IPv6 4
/* Length of IPv6 address */
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif
#ifndef IPPROTO_SCTP
#define IPPROTO_SCTP 132
#endif
/* Dummy WNOHANG for Windows */
#ifndef WNOHANG
#define WNOHANG 0
#endif
#endif
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