/*************************************************************************** * 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; int nsock_engine; /* 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); /* 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);