nmap/main.cc

/***************************************************************************
 * main.cc -- Contains the main() function of Nmap.  Note that main()      *
 * does very little except for calling nmap_main() (which is in nmap.cc)   *
 *                                                                         *
 ***********************IMPORTANT NMAP LICENSE TERMS************************
 *                                                                         *
 * The Nmap Security Scanner is (C) 1996-2010 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, 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-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.  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 as well as helping to     *
 * fund the continued development of Nmap technology.  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, it is assumed that you are      *
 * offering the Nmap Project (Insecure.Com LLC) the unlimited,             *
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 * 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 <signal.h>

#include "nmap.h"
#include "NmapOps.h"
#include "utils.h"

#ifdef MTRACE
#include "mcheck.h"
#endif

#ifdef __amigaos__
#include <proto/exec.h>
#include <proto/dos.h>
#include "nmap_amigaos.h"
struct Library *SocketBase = NULL, *MiamiBase = NULL, *MiamiBPFBase = NULL, *MiamiPCapBase = NULL;
static const char ver[] = "$VER:" NMAP_NAME " v"NMAP_VERSION " [Amiga.sf]";

static void CloseLibs(void) {
  if ( MiamiPCapBase ) CloseLibrary( MiamiPCapBase );
  if ( MiamiBPFBase  ) CloseLibrary(  MiamiBPFBase );
  if (  SocketBase   ) CloseLibrary(   SocketBase  );
  if (   MiamiBase   ) CloseLibrary(   MiamiBase   );
}

static BOOL OpenLibs(void) {
 if(!(    MiamiBase = OpenLibrary(MIAMINAME,21))) return FALSE;
 if(!(   SocketBase = OpenLibrary("bsdsocket.library", 4))) return FALSE;
 if(!( MiamiBPFBase = OpenLibrary(MIAMIBPFNAME,3))) return FALSE;
 if(!(MiamiPCapBase = OpenLibrary(MIAMIPCAPNAME,5))) return FALSE;
 atexit(CloseLibs);
 return TRUE;
}
#endif

/* global options */
extern NmapOps o;  /* option structure */

int main(int argc, char *argv[]) {
  /* The "real" main is nmap_main().  This function hijacks control at the
     beginning to do the following:
     3) Check the environment variable NMAP_ARGS.
     2) Check if Nmap was called with --resume.
     3) Resume a previous scan or just call nmap_main.
  */
  char command[2048];
  int myargc;
  char **myargv = NULL;
  char *cptr;
  int ret;
  int i;

#ifdef __amigaos__
	if(!OpenLibs()) {
		error("Couldn't open TCP/IP Stack Library(s)!");
		exit(20);
	}
	MiamiBPFInit((struct Library *)MiamiBase, (struct Library *)SocketBase);
	MiamiPCapInit((struct Library *)MiamiBase, (struct Library *)SocketBase);
#endif

#ifdef MTRACE
  // This glibc extension enables memory tracing to detect memory
  // leaks, frees of unallocated memory, etc.  
  // See http://www.gnu.org/manual/glibc-2.2.5/html_node/Allocation-Debugging.html#Allocation%20Debugging .
  // It only works if the environment variable MALLOC_TRACE is set to a file
  // which a memory usage log will be written to.  After the program quits
  // I can analyze the log via the command 'mtrace [binaryiran] [logfile]'
  // MTRACE should only be defined during debug sessions.
  mtrace();
#endif

  if ((cptr = getenv("NMAP_ARGS"))) {
    if (Snprintf(command, sizeof(command), "nmap %s", cptr) >= (int) sizeof(command)) {
        error("Warning: NMAP_ARGS variable is too long, truncated");
    }
    /* copy rest of command-line arguments */
    for (i = 1; i < argc && strlen(command) + strlen(argv[i]) + 1 < sizeof(command); i++) {
      strcat(command, " ");
      strcat(command, argv[i]);
    }
    myargc = arg_parse(command, &myargv);
    if (myargc < 1) {
      fatal("NMAP_ARG variable could not be parsed");
    }
    ret = nmap_main(myargc, myargv);
    arg_parse_free(myargv);
    return ret;
  }

  if (argc == 3 && strcmp("--resume", argv[1]) == 0) {
    /* OK, they want to resume an aborted scan given the log file specified.
       Lets gather our state from the log file */
    if (gather_logfile_resumption_state(argv[2], &myargc, &myargv) == -1) {
      fatal("Cannot resume from (supposed) log file %s", argv[2]);
    }
    return nmap_main(myargc, myargv);
  }

  return nmap_main(argc, argv);
}