/***************************************************************************
* ncat_core.h *
***********************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 nmap-dev@insecure.org 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 GNU *
* General Public License v2.0 for more details at *
* http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file *
* included with Nmap. *
* *
***************************************************************************/
/* $Id$ */
#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;
extern union sockaddr_u httpconnect;
extern union sockaddr_u socksconnect;
struct options {
unsigned short portno;
int verbose;
int debug;
char *target;
int af;
int broker;
int listen;
int keepopen;
int sendonly;
int recvonly;
int telnet;
int udp;
int sctp;
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;
/* Loose source-routing stuff */
struct in_addr srcrtes[8];
int numsrcrtes;
int srcrteptr;
/* Maximum number of simultaneous connections */
int conn_limit;
int conntimeout;
char *cmdexec;
int shellexec;
char *proxy_auth;
char *proxytype;
int ssl;
char *sslcert;
char *sslkey;
int sslverify;
char *ssltrustfile;
};
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);
/* Tries to resolve the given name (or literal IP) into a sockaddr structure.
Pass 0 for the port if you don't care. Returns 0 if hostname cannot be
resolved. */
int resolve(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);