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nmap/ncat/ncat_core.h
dmiller 6e33d6ac3c Bump date in copyright headers
2016-04-04 15:38:44 +00:00

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/***************************************************************************
* ncat_core.h *
***********************IMPORTANT NMAP LICENSE TERMS************************
* *
* The Nmap Security Scanner is (C) 1996-2016 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. *
* *
* 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_CORE_H
#define NCAT_CORE_H
#include "nsock.h"
#include "nbase.h"
#include "util.h"
#include "sockaddr_u.h"
/* Maximum size of the srcaddrs array. In this case two because we can only have
a IPV4 INADDR_ANY and a IPV6 in6addr_any at most or a user defined address */
#define NUM_LISTEN_ADDRS 2
extern union sockaddr_u listenaddrs[NUM_LISTEN_ADDRS];
extern int num_listenaddrs;
extern union sockaddr_u srcaddr;
extern size_t srcaddrlen;
extern union sockaddr_u targetss;
extern size_t targetsslen;
enum exec_mode {
EXEC_PLAIN,
EXEC_SHELL,
EXEC_LUA,
};
struct options {
unsigned short portno;
int verbose;
int debug;
char *target;
int af;
/* IPPROTO_TCP, IPPROTO_SCTP, or IPPROTO_UDP */
int proto;
int broker;
int listen;
int keepopen;
int sendonly;
int recvonly;
int noshutdown;
int telnet;
int linedelay;
int chat;
int nodns;
const char *normlog;
const char *hexlog;
int normlogfd;
int hexlogfd;
int append;
int idletimeout;
int crlf;
/* Were any hosts specifically allowed? If so, deny all others. */
int allow;
int deny;
struct addrset allowset;
struct addrset denyset;
int httpserver;
int nsock_engine;
/* Output messages useful for testing to stderr? */
int test;
/* Loose source-routing stuff */
struct in_addr srcrtes[8];
int numsrcrtes;
int srcrteptr;
/* Maximum number of simultaneous connections */
int conn_limit;
int conntimeout;
/* When execmode == EXEC_LUA, cmdexec is the name of the file to run. */
char *cmdexec;
enum exec_mode execmode;
char *proxy_auth;
char *proxytype;
char *proxyaddr;
int ssl;
char *sslcert;
char *sslkey;
int sslverify;
char *ssltrustfile;
char *sslciphers;
};
extern struct options o;
/* The time the program was started, for exit statistics in connect mode. */
extern struct timeval start_time;
/* Initializes global options to their default values. */
void options_init(void);
/* Resolves the given hostname or IP address with getaddrinfo, and stores the
first result (if any) in *ss and *sslen. The value of port will be set in the
appropriate place in *ss; set to 0 if you don't care. af may be AF_UNSPEC, in
which case getaddrinfo may return e.g. both IPv4 and IPv6 results; which one
is first depends on the system configuration. Returns 0 on success, or a
getaddrinfo return code (suitable for passing to gai_strerror) on failure.
*ss and *sslen are always defined when this function returns 0.
If the global o.nodns is true, then do not resolve any names with DNS. */
int resolve(const char *hostname, unsigned short port,
struct sockaddr_storage *ss, size_t *sslen, int af);
int fdinfo_close(struct fdinfo *fdn);
int fdinfo_recv(struct fdinfo *fdn, char *buf, size_t size);
int fdinfo_send(struct fdinfo *fdn, const char *buf, size_t size);
int fdinfo_pending(struct fdinfo *fdn);
int ncat_recv(struct fdinfo *fdn, char *buf, size_t size, int *pending);
int ncat_send(struct fdinfo *fdn, const char *buf, size_t size);
/* Broadcast a message to all the descriptors in fds. Returns -1 if any of the
sends failed. */
extern int ncat_broadcast(fd_set *fds, const fd_list_t *fdlist, const char *msg, size_t size);
/* Do telnet WILL/WONT DO/DONT negotiations */
extern void dotelnet(int s, unsigned char *buf, size_t bufsiz);
/* sleep(), usleep(), msleep(), Sleep() -- all together now, "portability".
*
* There is no upper or lower limit to the delayval, so if you pass in a short
* length of time <100ms, then you're likely going to get odd results.
* This is because the Linux timeslice is 10ms-200ms. So don't expect
* it to return for at least that long.
*
* Block until the specified time has elapsed, then return 1.
*/
extern int ncat_delay_timer(int delayval);
/* Open a logfile for writing.
* Return the open file descriptor. */
extern int ncat_openlog(const char *logfile, int append);
extern void ncat_log_send(const char *data, size_t len);
extern void ncat_log_recv(const char *data, size_t len);
extern int ncat_hostaccess(char *matchaddr, char *filename, char *remoteip);
/* Make it so that line endings read from a console are always \n (not \r\n).
Defined in ncat_posix.c and ncat_win.c. */
extern void set_lf_mode(void);
extern int getaddrfamily(const char *addr);
extern int setenv_portable(const char *name, const char *value);
extern void setup_environment(struct fdinfo *fdinfo);
#endif
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