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84773c74a5
This eliminates the ambiguity that could exist when, say, both o.udp and o.sctp were both set. The code would use whichever it happened to test first. This also makes TCP mode explicit with IPPROTO_TCP.
226 lines
11 KiB
C
226 lines
11 KiB
C
/***************************************************************************
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* ncat_core.h *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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* *
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* The Nmap Security Scanner is (C) 1996-2012 Insecure.Com LLC. Nmap is *
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* also a registered trademark of Insecure.Com LLC. This program is free *
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* software; you may redistribute and/or modify it under the terms of the *
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* GNU General Public License as published by the Free Software *
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* Foundation; Version 2 with the clarifications and exceptions described *
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* below. This guarantees your right to use, modify, and redistribute *
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* this software under certain conditions. If you wish to embed Nmap *
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* technology into proprietary software, we sell alternative licenses *
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* (contact sales@insecure.com). Dozens of software vendors already *
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* license Nmap technology such as host discovery, port scanning, OS *
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* detection, version detection, and the Nmap Scripting Engine. *
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* *
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* Note that the GPL places important restrictions on "derived works", yet *
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* it does not provide a detailed definition of that term. To avoid *
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* misunderstandings, we interpret that term as broadly as copyright law *
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* allows. For example, we consider an application to constitute a *
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* "derivative work" for the purpose of this license if it does any of the *
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* following: *
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* o Integrates source code from Nmap *
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* o Reads or includes Nmap copyrighted data files, such as *
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* nmap-os-db or nmap-service-probes. *
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* o Executes Nmap and parses the results (as opposed to typical shell or *
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* execution-menu apps, which simply display raw Nmap output and so are *
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* not derivative works.) *
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* o Integrates/includes/aggregates Nmap into a proprietary executable *
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* installer, such as those produced by InstallShield. *
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* o Links to a library or executes a program that does any of the above *
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* *
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* The term "Nmap" should be taken to also include any portions or derived *
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* works of Nmap, as well as other software we distribute under this *
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* license such as Zenmap, Ncat, and Nping. This list is not exclusive, *
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* but is meant to clarify our interpretation of derived works with some *
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* common examples. Our interpretation applies only to Nmap--we don't *
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* speak for other people's GPL works. *
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* *
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* If you have any questions about the GPL licensing restrictions on using *
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* Nmap in non-GPL works, we would be happy to help. As mentioned above, *
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* we also offer alternative license to integrate Nmap into proprietary *
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* applications and appliances. These contracts have been sold to dozens *
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* of software vendors, and generally include a perpetual license as well *
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* as providing for priority support and updates. They also fund the *
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* continued development of Nmap. Please email sales@insecure.com for *
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* further information. *
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* *
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* As a special exception to the GPL terms, Insecure.Com LLC grants *
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* permission to link the code of this program with any version of the *
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* OpenSSL library which is distributed under a license identical to that *
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* listed in the included docs/licenses/OpenSSL.txt file, and distribute *
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* linked combinations including the two. You must obey the GNU GPL in all *
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* respects for all of the code used other than OpenSSL. If you modify *
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* this file, you may extend this exception to your version of the file, *
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* but you are not obligated to do so. *
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* *
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* If you received these files with a written license agreement or *
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* contract stating terms other than the terms above, then that *
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* alternative license agreement takes precedence over these comments. *
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* *
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* Source is provided to this software because we believe users have a *
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* right to know exactly what a program is going to do before they run it. *
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* This also allows you to audit the software for security holes (none *
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* have been found so far). *
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* *
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* Source code also allows you to port Nmap to new platforms, fix bugs, *
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* and add new features. You are highly encouraged to send your changes *
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* to the dev@nmap.org mailing list for possible incorporation into the *
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* main distribution. By sending these changes to Fyodor or one of the *
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* Insecure.Org development mailing lists, or checking them into the Nmap *
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* source code repository, it is understood (unless you specify otherwise) *
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* that you are offering the Nmap Project (Insecure.Com LLC) the *
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* unlimited, non-exclusive right to reuse, modify, and relicense the *
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* code. Nmap will always be available Open Source, but this is important *
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* because the inability to relicense code has caused devastating problems *
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* for other Free Software projects (such as KDE and NASM). We also *
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* occasionally relicense the code to third parties as discussed above. *
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* If you wish to specify special license conditions of your *
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* contributions, just say so when you send them. *
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* *
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* This program is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Nmap *
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* license file for more details (it's in a COPYING file included with *
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* Nmap, and also available from https://svn.nmap.org/nmap/COPYING *
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* *
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***************************************************************************/
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/* $Id$ */
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#include "nsock.h"
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#include "nbase.h"
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#include "util.h"
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#include "sockaddr_u.h"
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/* Maximum size of the srcaddrs array. In this case two because we can only have
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a IPV4 INADDR_ANY and a IPV6 in6addr_any at most or a user defined address */
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#define NUM_LISTEN_ADDRS 2
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extern union sockaddr_u listenaddrs[NUM_LISTEN_ADDRS];
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extern int num_listenaddrs;
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extern union sockaddr_u srcaddr;
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extern size_t srcaddrlen;
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extern union sockaddr_u targetss;
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extern size_t targetsslen;
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extern union sockaddr_u httpconnect;
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extern union sockaddr_u socksconnect;
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struct options {
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unsigned short portno;
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int verbose;
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int debug;
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char *target;
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int af;
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/* IPPROTO_TCP, IPPROTO_SCTP, or IPPROTO_UDP */
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int proto;
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int broker;
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int listen;
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int keepopen;
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int sendonly;
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int recvonly;
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int telnet;
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int linedelay;
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int chat;
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int nodns;
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const char *normlog;
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const char *hexlog;
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int normlogfd;
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int hexlogfd;
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int append;
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int idletimeout;
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int crlf;
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/* Were any hosts specifically allowed? If so, deny all others. */
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int allow;
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int deny;
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struct addrset allowset;
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struct addrset denyset;
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int httpserver;
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int nsock_engine;
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/* Loose source-routing stuff */
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struct in_addr srcrtes[8];
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int numsrcrtes;
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int srcrteptr;
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/* Maximum number of simultaneous connections */
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int conn_limit;
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int conntimeout;
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char *cmdexec;
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int shellexec;
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char *proxy_auth;
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char *proxytype;
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int ssl;
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char *sslcert;
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char *sslkey;
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int sslverify;
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char *ssltrustfile;
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};
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extern struct options o;
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/* The time the program was started, for exit statistics in connect mode. */
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extern struct timeval start_time;
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/* Initializes global options to their default values. */
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void options_init(void);
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/* Resolves the given hostname or IP address with getaddrinfo, and stores the
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first result (if any) in *ss and *sslen. The value of port will be set in the
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appropriate place in *ss; set to 0 if you don't care. af may be AF_UNSPEC, in
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which case getaddrinfo may return e.g. both IPv4 and IPv6 results; which one
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is first depends on the system configuration. Returns 0 on success, or a
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getaddrinfo return code (suitable for passing to gai_strerror) on failure.
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*ss and *sslen are always defined when this function returns 0.
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If the global o.nodns is true, then do not resolve any names with DNS. */
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int resolve(const char *hostname, unsigned short port,
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struct sockaddr_storage *ss, size_t *sslen, int af);
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int fdinfo_close(struct fdinfo *fdn);
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int fdinfo_recv(struct fdinfo *fdn, char *buf, size_t size);
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int fdinfo_send(struct fdinfo *fdn, const char *buf, size_t size);
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int fdinfo_pending(struct fdinfo *fdn);
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int ncat_recv(struct fdinfo *fdn, char *buf, size_t size, int *pending);
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int ncat_send(struct fdinfo *fdn, const char *buf, size_t size);
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/* Broadcast a message to all the descriptors in fds. Returns -1 if any of the
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sends failed. */
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extern int ncat_broadcast(fd_set *fds, const fd_list_t *fdlist, const char *msg, size_t size);
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/* Do telnet WILL/WONT DO/DONT negotiations */
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extern void dotelnet(int s, unsigned char *buf, size_t bufsiz);
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/* sleep(), usleep(), msleep(), Sleep() -- all together now, "portability".
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*
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* There is no upper or lower limit to the delayval, so if you pass in a short
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* length of time <100ms, then you're likely going to get odd results.
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* This is because the Linux timeslice is 10ms-200ms. So don't expect
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* it to return for at least that long.
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*
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* Block until the specified time has elapsed, then return 1.
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*/
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extern int ncat_delay_timer(int delayval);
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/* Open a logfile for writing.
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* Return the open file descriptor. */
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extern int ncat_openlog(const char *logfile, int append);
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extern void ncat_log_send(const char *data, size_t len);
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extern void ncat_log_recv(const char *data, size_t len);
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extern int ncat_hostaccess(char *matchaddr, char *filename, char *remoteip);
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/* Make it so that line endings read from a console are always \n (not \r\n).
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Defined in ncat_posix.c and ncat_win.c. */
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extern void set_lf_mode(void);
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