nmap/nmap.h

/***************************************************************************
 * nmap.h -- Currently handles some of Nmap's port scanning features as    *
 * well as the command line user interface.  Note that the actual main()   *
 * function is in main.c                                                   *
 *                                                                         *
 ***********************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 NMAP_H
#define NMAP_H

/************************INCLUDES**********************************/

#ifdef HAVE_CONFIG_H
#include "nmap_config.h"
#else
#ifdef WIN32
#include "nmap_winconfig.h"
#endif /* WIN32 */
#endif /* HAVE_CONFIG_H */

#ifdef __amigaos__
#include "nmap_amigaos.h"
#endif

#if HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_BSTRING_H
#include <bstring.h>
#endif

/* Keep assert() defined for security reasons */
#undef NDEBUG

#include <assert.h>

/*#include <net/if_arp.h> *//* defines struct arphdr needed for if_ether.h */
// #if HAVE_NET_IF_H
// #ifndef NET_IF_H  /* why doesn't OpenBSD do this?! */
// #include <net/if.h>
// #define NET_IF_H
// #endif
// #endif
// #if HAVE_NETINET_IF_ETHER_H
// #ifndef NETINET_IF_ETHER_H
// #include <netinet/if_ether.h>
// #define NETINET_IF_ETHER_H
// #endif /* NETINET_IF_ETHER_H */
// #endif /* HAVE_NETINET_IF_ETHER_H */

/*******  DEFINES  ************/

#ifdef NMAP_OEM
#include "../nmap-build/nmap-oem.h"
#endif

#ifndef NMAP_NAME
#define NMAP_NAME "Nmap"
#endif
#define NMAP_URL "https://nmap.org"

#define _STR(X) #X
#define STR(X)  _STR(X)

#ifndef NMAP_VERSION
/* Edit this definition only within the quotes, because it is read from this
   file by the makefiles. */
#define NMAP_MAJOR 7
#define NMAP_MINOR 94
#define NMAP_BUILD 1
/* SVN, BETA, etc. */
#define NMAP_SPECIAL "SVN"

#define NMAP_VERSION STR(NMAP_MAJOR) "." STR(NMAP_MINOR) NMAP_SPECIAL
#define NMAP_NUM_VERSION STR(NMAP_MAJOR) "." STR(NMAP_MINOR) "." STR(NMAP_BUILD) ".0"
#endif

#define NMAP_XMLOUTPUTVERSION "1.05"

/* User configurable #defines: */
#define MAX_PROBE_PORTS 10     /* How many TCP probe ports are allowed ? */
/* Default number of ports in parallel.  Doesn't always involve actual
   sockets.  Can also adjust with the -M command line option.  */
#define MAX_SOCKETS 36

#define MAX_TIMEOUTS MAX_SOCKETS   /* How many timed out connection attempts
                                      in a row before we decide the host is
                                      dead? */
#define DEFAULT_TCP_PROBE_PORT 80 /* The ports TCP ping probes go to if
                                     unspecified by user -- uber hackers
                                     change this to 113 */
#define DEFAULT_TCP_PROBE_PORT_SPEC STR(DEFAULT_TCP_PROBE_PORT)
#define DEFAULT_UDP_PROBE_PORT 40125 /* The port UDP ping probes go to
                                          if unspecified by user */
#define DEFAULT_UDP_PROBE_PORT_SPEC STR(DEFAULT_UDP_PROBE_PORT)
#define DEFAULT_SCTP_PROBE_PORT 80 /* The port SCTP probes go to
                                      if unspecified by
                                      user */
#define DEFAULT_SCTP_PROBE_PORT_SPEC STR(DEFAULT_SCTP_PROBE_PORT)
#define DEFAULT_PROTO_PROBE_PORT_SPEC "1,2,4" /* The IPProto ping probes to use
                                                 if unspecified by user */

#define MAX_DECOYS 128 /* How many decoys are allowed? */

/* TCP Options for TCP SYN probes: MSS 1460 */
#define TCP_SYN_PROBE_OPTIONS "\x02\x04\x05\xb4"
#define TCP_SYN_PROBE_OPTIONS_LEN (sizeof(TCP_SYN_PROBE_OPTIONS)-1)

/* Default maximum send delay between probes to the same host */
#ifndef MAX_TCP_SCAN_DELAY
#define MAX_TCP_SCAN_DELAY 1000
#endif

#ifndef MAX_UDP_SCAN_DELAY
#define MAX_UDP_SCAN_DELAY 1000
#endif

#ifndef MAX_SCTP_SCAN_DELAY
#define MAX_SCTP_SCAN_DELAY 1000
#endif

/* Maximum number of extra hostnames, OSs, and devices, we
   consider when outputting the extra service info fields */
#define MAX_SERVICE_INFO_FIELDS 5

/* We wait at least 100 ms for a response by default - while that
   seems aggressive, waiting too long can cause us to fail to detect
   drops until many probes later on extremely low-latency
   networks (such as localhost scans).  */
#ifndef MIN_RTT_TIMEOUT
#define MIN_RTT_TIMEOUT 100
#endif

#ifndef MAX_RTT_TIMEOUT
#define MAX_RTT_TIMEOUT 10000 /* Never allow more than 10 secs for packet round
                                 trip */
#endif

#define INITIAL_RTT_TIMEOUT 1000 /* Allow 1 second initially for packet responses */
#define INITIAL_ARP_RTT_TIMEOUT 200 /* The initial timeout for ARP is lower */

#ifndef MAX_RETRANSMISSIONS
#define MAX_RETRANSMISSIONS 10    /* 11 probes to port at maximum */
#endif

/* Number of hosts we pre-ping and then scan.  We do a lot more if
   randomize_hosts is set.  Every one you add to this leads to ~1K of
   extra always-resident memory in nmap */
#define PING_GROUP_SZ 4096

/* DO NOT change stuff after this point */
#define UC(b)   (((int)b)&0xff)
#define SA    struct sockaddr  /*Ubertechnique from R. Stevens */

#define HOST_UNKNOWN 0
#define HOST_UP 1
#define HOST_DOWN 2

#define PINGTYPE_UNKNOWN 0
#define PINGTYPE_NONE 1
#define PINGTYPE_ICMP_PING 2
#define PINGTYPE_ICMP_MASK 4
#define PINGTYPE_ICMP_TS 8
#define PINGTYPE_TCP  16
#define PINGTYPE_TCP_USE_ACK 32
#define PINGTYPE_TCP_USE_SYN 64
/* # define PINGTYPE_RAWTCP 128 used to be here, but was never used. */
#define PINGTYPE_CONNECTTCP 256
#define PINGTYPE_UDP  512
/* #define PINGTYPE_ARP 1024 // Not used; see o.implicitARPPing */
#define PINGTYPE_PROTO 2048
#define PINGTYPE_SCTP_INIT 4096

/* Empirically determined optimum combinations of different numbers of probes:
     -PE
     -PE -PA80
     -PE -PA80 -PS443
     -PE -PA80 -PS443 -PP
     -PE -PA80 -PS443 -PP -PU40125
   We use the four-probe combination. */
#define DEFAULT_IPV4_PING_TYPES (PINGTYPE_ICMP_PING|PINGTYPE_TCP|PINGTYPE_TCP_USE_ACK|PINGTYPE_TCP_USE_SYN|PINGTYPE_ICMP_TS)
#define DEFAULT_IPV6_PING_TYPES (PINGTYPE_ICMP_PING|PINGTYPE_TCP|PINGTYPE_TCP_USE_ACK|PINGTYPE_TCP_USE_SYN)
#define DEFAULT_PING_ACK_PORT_SPEC "80"
#define DEFAULT_PING_SYN_PORT_SPEC "443"
/* For nonroot. */
#define DEFAULT_PING_CONNECT_PORT_SPEC "80,443"

/* The max length of each line of the subject fingerprint when
   wrapped. */
#define FP_RESULT_WRAP_LINE_LEN 74

/* Length of longest DNS name */
#define FQDN_LEN 254

/* Max payload: Worst case is IPv4 with 40bytes of options and TCP with 20
 * bytes of options. */
#define MAX_PAYLOAD_ALLOWED 65535-60-40

#ifndef recvfrom6_t
#  define recvfrom6_t int
#endif

/***********************PROTOTYPES**********************************/

/* Renamed main so that interactive mode could preprocess when necessary */
int nmap_main(int argc, char *argv[]);

int nmap_fetchfile(char *filename_returned, int bufferlen, const char *file);
int gather_logfile_resumption_state(char *fname, int *myargc, char ***myargv);

#endif /* NMAP_H */