nmapops.cc

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/***************************************************************************
 * NmapOps.cc -- The NmapOps class contains global options, mostly based   *
 * on user-provided command-line settings.                                 *
 *                                                                         *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2008 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 [e-mail]).  Dozens of software vendors already       *
 * license Nmap technology such as host discovery, port scanning, OS       *
 * detection, and version detection.                                       *
 *                                                                         *
 * 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 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-fingerprints 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.  This list is not exclusive, but is just meant to        *
 * clarify our interpretation of derived works with some common examples.  *
 * These restrictions only apply when you actually redistribute Nmap.  For *
 * example, nothing stops you from writing and selling a proprietary       *
 * front-end to Nmap.  Just distribute it by itself, and point people to   *
 * http://insecure.org/nmap/ to download Nmap.                             *
 *                                                                         *
 * We don't consider these to be added restrictions on top of the GPL, but *
 * just a clarification of how we interpret "derived works" as it applies  *
 * to our GPL-licensed Nmap product.  This is similar to the way Linus     *
 * Torvalds has announced his interpretation of how "derived works"        *
 * applies to Linux kernel modules.  Our interpretation refers only to     *
 * Nmap - we don't speak for any other GPL products.                       *
 *                                                                         *
 * 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 as well as helping to     *
 * fund the continued development of Nmap technology.  Please email        *
 * [e-mail] 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 Copying.OpenSSL 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 [e-mail] for possible incorporation into the main         *
 * distribution.  By sending these changes to Fyodor or one the            *
 * Insecure.Org development mailing lists, it is assumed that you are      *
 * offering Fyodor and 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 for more details at                              *
 * http://www.gnu.org/copyleft/gpl.html , or in the COPYING file included  *
 * with Nmap.                                                              *
 *                                                                         *
 ***************************************************************************/

/* $Id: NmapOps.cc 6633 2007-12-22 06:32:03Z fyodor $ */
#include "nmap.h"
#include "nbase.h"
#include "NmapOps.h"
#include "services.h"
#include "utils.h"
#ifdef WIN32
#include "winfix.h"
#endif

NmapOps o;

NmapOps::NmapOps() {
  datadir = NULL;
  xsl_stylesheet = NULL;
  Initialize();
}

NmapOps::~NmapOps() {
  if (ping_synprobes) free(ping_synprobes);
  if (ping_ackprobes) free(ping_ackprobes);
  if (ping_udpprobes) free(ping_udpprobes);
  if (ping_protoprobes) free(ping_protoprobes);
  if (datadir) free(datadir);
  if (xsl_stylesheet) free(xsl_stylesheet);
}

void NmapOps::ReInit() {
  Initialize();
}

// no setpf() because it is based on setaf() values
int NmapOps::pf() {
  return (af() == AF_INET)? PF_INET : PF_INET6;
}

int NmapOps::SourceSockAddr(struct sockaddr_storage *ss, size_t *ss_len) {
  if (sourcesocklen <= 0)
    return 1;
  assert(sourcesocklen <= sizeof(*ss));
  if (ss)
    memcpy(ss, &sourcesock, sourcesocklen);
  if (ss_len)
    *ss_len = sourcesocklen;
  return 0;
}

/* Note that it is OK to pass in a sockaddr_in or sockaddr_in6 casted
     to sockaddr_storage */
void NmapOps::setSourceSockAddr(struct sockaddr_storage *ss, size_t ss_len) {
  assert(ss_len > 0 && ss_len <= sizeof(*ss));
  memcpy(&sourcesock, ss, ss_len);
  sourcesocklen = ss_len;
}

struct in_addr NmapOps::v4source() {
 const struct in_addr *addy = v4sourceip();
  struct in_addr in;
  if (addy) return *addy;
  in.s_addr = 0;
  return in;
}

const struct in_addr *NmapOps::v4sourceip() {
   struct sockaddr_in *sin = (struct sockaddr_in *) &sourcesock;
  if (sin->sin_family == AF_INET) {
    return &(sin->sin_addr);
  }
  return NULL;
}

// Number of milliseconds since getStartTime().  The current time is an
// optional argument to avoid an extra gettimeofday() call.
int NmapOps::TimeSinceStartMS(struct timeval *now) {
  struct timeval tv;
  if (!now)
    gettimeofday(&tv, NULL);
  else tv = *now;

  return TIMEVAL_MSEC_SUBTRACT(tv, start_time);
}

void NmapOps::Initialize() {
  char tmpxsl[MAXPATHLEN];

  setaf(AF_INET);
#if defined WIN32 || defined __amigaos__
  isr00t = 1;
#else
  if (getenv("NMAP_PRIVILEGED"))
    isr00t = 1;
  else if (getenv("NMAP_UNPRIVILEGED"))
    isr00t = 0;
  else
    isr00t = !(geteuid());
#endif
  debugging = 0;
  verbose = 0;
  randomize_hosts = 0;
  sendpref = PACKET_SEND_NOPREF;
  spoofsource = 0;
  fastscan = 0;
  device[0] = '\0';
  interactivemode = 0;
  ping_group_sz = PING_GROUP_SZ;
  generate_random_ips = 0;
  reference_FPs = NULL;
  magic_port = 33000 + (get_random_uint() % 31000);
  magic_port_set = 0;
  num_ping_synprobes = num_ping_ackprobes = num_ping_udpprobes = num_ping_protoprobes = 0;
  ping_synprobes = ping_ackprobes = ping_udpprobes = ping_protoprobes = NULL;
  timing_level = 3;
  max_parallelism = 0;
  min_parallelism = 0;
  max_os_tries = 5;
  max_rtt_timeout = MAX_RTT_TIMEOUT;
  min_rtt_timeout = MIN_RTT_TIMEOUT;
  initial_rtt_timeout = INITIAL_RTT_TIMEOUT;
  max_retransmissions = MAX_RETRANSMISSIONS;
  min_host_group_sz = 1;
  max_host_group_sz = 100000; // don't want to be restrictive unless user sets
  max_tcp_scan_delay = MAX_TCP_SCAN_DELAY;
  max_udp_scan_delay = MAX_UDP_SCAN_DELAY;
  max_ips_to_scan = 0;
  extra_payload_length = 0;
  extra_payload = NULL;
  scan_delay = 0;
  open_only = false;
  scanflags = -1;
  defeat_rst_ratelimit = 0;
  resume_ip.s_addr = 0;
  osscan_limit = 0;
  osscan_guess = 0;
  numdecoys = 0;
  decoyturn = -1;
  osscan = 0;
  servicescan = 0;
  override_excludeports = 0;
  version_intensity = 7;
  pingtype = PINGTYPE_UNKNOWN;
  listscan = pingscan = allowall = ackscan = bouncescan = connectscan = 0;
  rpcscan = nullscan = xmasscan = fragscan = synscan = windowscan = 0;
  maimonscan = idlescan = finscan = udpscan = ipprotscan = noresolve = 0;
  append_output = 0;
  memset(logfd, 0, sizeof(FILE *) * LOG_NUM_FILES);
  ttl = -1;
  badsum = 0;
  nmap_stdout = stdout;
  gettimeofday(&start_time, NULL);
  pTrace = vTrace = false;
  reason = false;
  if (datadir) free(datadir);
  datadir = NULL;
#if WIN32
  Strncpy(tmpxsl, "nmap.xsl", sizeof(tmpxsl));
#else
  Snprintf(tmpxsl, sizeof(tmpxsl), "%s/nmap.xsl", NMAPDATADIR);
#endif
  if (xsl_stylesheet) free(xsl_stylesheet);
  xsl_stylesheet = strdup(tmpxsl);
  spoof_mac_set = false;
  mass_dns = true;
  log_errors = false;
  resolve_all = 0;
  dns_servers = NULL;
  noninteractive = false;
  current_scantype = STYPE_UNKNOWN;
  ipoptions = NULL;
  ipoptionslen = 0;
  ipopt_firsthop = 0;
  ipopt_lasthop  = 0;  
  release_memory = false;
  topportlevel = -1;
#ifndef NOLUA
  script = 0;
  scriptversion = 0;
  scripttrace = 0;
  scriptupdatedb = 0;
#endif
}

bool NmapOps::TCPScan() {
  return ackscan|bouncescan|connectscan|finscan|idlescan|maimonscan|nullscan|synscan|windowscan|xmasscan;
}

bool NmapOps::UDPScan() {
  return udpscan;
}