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Diffstat (limited to 'ncat/ncat.h')
| -rw-r--r-- | ncat/ncat.h | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/ncat/ncat.h b/ncat/ncat.h new file mode 100644 index 0000000..9f876ae --- /dev/null +++ b/ncat/ncat.h @@ -0,0 +1,218 @@ +/*************************************************************************** + * ncat.h * + ***********************IMPORTANT NMAP LICENSE TERMS************************ + * + * The Nmap Security Scanner is (C) 1996-2023 Nmap Software LLC ("The Nmap + * Project"). Nmap is also a registered trademark of the Nmap Project. + * + * This program is distributed under the terms of the Nmap Public Source + * License (NPSL). The exact license text applying to a particular Nmap + * release or source code control revision is contained in the LICENSE + * file distributed with that version of Nmap or source code control + * revision. More Nmap copyright/legal information is available from + * https://nmap.org/book/man-legal.html, and further information on the + * NPSL license itself can be found at https://nmap.org/npsl/ . This + * header summarizes some key points from the Nmap license, but is no + * substitute for the actual license text. + * + * Nmap is generally free for end users to download and use themselves, + * including commercial use. It is available from https://nmap.org. + * + * The Nmap license generally prohibits companies from using and + * redistributing Nmap in commercial products, but we sell a special Nmap + * OEM Edition with a more permissive license and special features for + * this purpose. See https://nmap.org/oem/ + * + * If you have received a written Nmap license agreement or contract + * stating terms other than these (such as an Nmap OEM license), you may + * choose to use and redistribute Nmap under those terms instead. + * + * The official Nmap Windows builds include the Npcap software + * (https://npcap.com) for packet capture and transmission. It is under + * separate license terms which forbid redistribution without special + * permission. So the official Nmap Windows builds may not be redistributed + * without special permission (such as an Nmap OEM license). + * + * 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. + * + * Source code also allows you to port Nmap to new platforms, fix bugs, and add + * new features. You are highly encouraged to submit your changes as a Github PR + * or by email to the dev@nmap.org mailing list for possible incorporation into + * the main distribution. Unless you specify otherwise, it is understood that + * you are offering us very broad rights to use your submissions as described in + * the Nmap Public Source License Contributor Agreement. This is important + * because we fund the project by selling licenses with various terms, and also + * because the inability to relicense code has caused devastating problems for + * other Free Software projects (such as KDE and NASM). + * + * The free version of Nmap 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. Warranties, + * indemnification and commercial support are all available through the + * Npcap OEM program--see https://nmap.org/oem/ + * + ***************************************************************************/ + +/* $Id$ */ + +#ifndef NCAT_H_ +#define NCAT_H_ + +#include "ncat_config.h" + +#include <nbase.h> + +#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 "https://nmap.org/ncat" +#define NCAT_VERSION "7.94SVN" + +#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; + unsigned char nmethods; + char methods[3]; +} __attribute__((packed)); + +struct socks5_auth { + char ver; // must be always 1 + unsigned char data[SOCKS_BUFF_SIZE]; +} __attribute__((packed)); + +struct socks5_request { + char ver; + char cmd; + char rsv; + char atyp; + unsigned 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 + +#define SOCKS5_USR_MAXLEN 255 +#define SOCKS5_PWD_MAXLEN 255 +#define SOCKS5_DST_MAXLEN 255 + +#if SOCKS_BUFF_SIZE < (1 + SOCKS5_USR_MAXLEN) + (1 + SOCKS5_PWD_MAXLEN) +#error SOCKS_BUFF_SIZE is defined too small to handle SOCKS5 authentication +#endif + +#if SOCKS_BUFF_SIZE < (1 + SOCKS5_DST_MAXLEN) + 2 +#error SOCKS_BUFF_SIZE is defined too small to handle SOCKS5 destination +#endif + +/* 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 |