File: main.c

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ntop 3:3.3-11
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/*
 * -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 *                          http://www.ntop.org
 *
 * Copyright (C) 1998-2007 Luca Deri <deri@ntop.org>
 *
 * -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "ntop.h"
#include "globals-report.h"
#include "scsiUtils.h"

#if defined(MEMORY_DEBUG) && (MEMORY_DEBUG == 4) && defined(HAVE_BACKTRACE)
#include <execinfo.h>
#endif

char static_ntop;

/*
 * Hello World! This is ntop speaking...
 */
void welcome (FILE * fp) {
  fprintf (fp, "Welcome to %s v.%s\n[Configured on %s, built on %s]\n",
	   myGlobals.program_name, version, configureDate, buildDate);
  
  fprintf (fp, "Copyright 1998-2007 by %s.\n", author);
  fprintf (fp, "Get the freshest ntop from http://www.ntop.org/\n");
}


/*
 * Wrong. Please try again accordingly to ....
 */
void usage(FILE * fp) {
  char *newLine = "";
  
#ifdef WIN32
  newLine = "\n\t";
#endif

  welcome(fp);

  fprintf(fp, "\nUsage: %s [OPTION]\n\n", myGlobals.program_name);
  fprintf(fp, "Basic options:\n");
  fprintf(fp, "    [-h             | --help]                             %sDisplay this help and exit\n", newLine);
#ifndef WIN32
  fprintf(fp, "    [-u <user>      | --user <user>]                      %sUserid/name to run ntop under (see man page)\n", newLine);
#endif /* WIN32 */
  fprintf(fp, "    [-t <number>    | --trace-level <number>]             %sTrace level [0-6]\n", newLine);
  fprintf(fp, "    [-P <path>      | --db-file-path <path>]              %sPath for ntop internal database files\n", newLine);
  fprintf(fp, "    [-Q <path>      | --spool-file-path <path>]           %sPath for ntop spool files\n", newLine);
  fprintf(fp, "    [-w <port>      | --http-server <port>]               %sWeb server (http:) port (or address:port) to listen on\n", newLine);
#ifdef HAVE_OPENSSL
  fprintf(fp, "    [-W <port>      | --https-server <port>]              %sWeb server (https:) port (or address:port) to listen on\n", newLine);
#endif


  fprintf(fp, "\nAdvanced options:\n");
  fprintf(fp, "    [-4             | --ipv4]                             %sUse IPv4 connections\n",newLine);
  fprintf(fp, "    [-6             | --ipv6]                             %sUse IPv6 connections\n",newLine);
  fprintf(fp, "    [-a <file>      | --access-log-file <file>]           %sFile for ntop web server access log\n", newLine);
  fprintf(fp, "    [-b             | --disable-decoders]                 %sDisable protocol decoders\n", newLine);
  fprintf(fp, "    [-c             | --sticky-hosts]                     %sIdle hosts are not purged from memory\n", newLine);

#ifndef WIN32
  fprintf(fp, "    [-d             | --daemon]                           %sRun ntop in daemon mode\n", newLine);
#endif
  fprintf(fp, "    [-e <number>    | --max-table-rows <number>]          %sMaximum number of table rows to report\n", newLine);
  fprintf(fp, "    [-f <file>      | --traffic-dump-file <file>]         %sTraffic dump file (see tcpdump)\n", newLine);
  fprintf(fp, "    [-g             | --track-local-hosts]                %sTrack only local hosts\n", newLine);


#ifndef WIN32
  fprintf(fp, "    [-i <name>      | --interface <name>]                 %sInterface name or names to monitor\n", newLine);
#else
  fprintf(fp, "    [-i <number>    | --interface <number|name>]          %sInterface index number (or name) to monitor\n", newLine);
#endif
  fprintf(fp, "    [-j             | --create-other-packets]             %sCreate file ntop-other-pkts.XXX.pcap file\n", newLine);
  fprintf(fp, "    [-l <path>      | --pcap-log <path>]                  %sDump packets captured to a file (debug only!)\n", newLine);
  fprintf(fp, "    [-m <addresses> | --local-subnets <addresses>]        %sLocal subnetwork(s) (see man page)\n", newLine);
  fprintf(fp, "    [-n             | --numeric-ip-addresses]             %sNumeric IP addresses - no DNS resolution\n", newLine);
  fprintf(fp, "    [-o             | --no-mac]                           %sntop will trust just IP addresses (no MACs)\n", newLine);
  fprintf(fp, "    [-p <list>      | --protocols <list>]                 %sList of IP protocols to monitor (see man page)\n", newLine);
  fprintf(fp, "    [-q             | --create-suspicious-packets]        %sCreate file ntop-suspicious-pkts.XXX.pcap file\n", newLine);
  fprintf(fp, "    [-r <number>    | --refresh-time <number>]            %sRefresh time in seconds, default is %d\n",
	  newLine, DEFAULT_NTOP_AUTOREFRESH_INTERVAL);
  fprintf(fp, "    [-s             | --no-promiscuous]                   %sDisable promiscuous mode\n", newLine);


  fprintf(fp, "    [-x <max num hash entries> ]                          %sMax num. hash entries ntop can handle (default %u)\n", 
	  newLine, myGlobals.runningPref.maxNumHashEntries);
  fprintf(fp, "    [-z             | --disable-sessions]                 %sDisable TCP session tracking\n", newLine);
  fprintf(fp, "    [-A]                                                  %sAsk admin user password and exit\n", newLine);
  fprintf(fp, "    [               | --set-admin-password=<pass>]        %sSet password for the admin user to <pass>\n", newLine);
  fprintf(fp, "    [               | --w3c]                              %sAdd extra headers to make better html\n", newLine);
  fprintf(fp, "    [-B <filter>]   | --filter-expression                 %sPacket filter expression, like tcpdump\n", newLine);
  fprintf(fp, "    [-C <rate>]     | --sampling-rate                     %sPacket capture sampling rate [default: 1 (no sampling)]\n", newLine);
  fprintf(fp, "    [-D <name>      | --domain <name>]                    %sInternet domain name\n", newLine);

  fprintf(fp, "    [-F <spec>      | --flow-spec <specs>]                %sFlow specs (see man page)\n", newLine);

#ifndef WIN32
  fprintf(fp, "    [-K             | --enable-debug]                     %sEnable debug mode\n", newLine);
#ifdef MAKE_WITH_SYSLOG
  fprintf(fp, "    [-L]                                                  %sDo logging via syslog\n", newLine);
  fprintf(fp, "    [               | --use-syslog=<facility>]            %sDo logging via syslog, facility ('=' is REQUIRED)\n",
	  newLine);
#endif /* MAKE_WITH_SYSLOG */
#endif

  fprintf(fp, "    [-M             | --no-interface-merge]               %sDon't merge network interfaces (see man page)\n",
	  newLine);
  fprintf(fp, "    [-N             | --wwn-map]                          %sMap file providing map of WWN to FCID/VSAN\n", newLine);
  fprintf(fp, "    [-O <path>      | --pcap-file-path <path>]            %sPath for log files in pcap format\n", newLine);
  fprintf(fp, "    [-U <URL>       | --mapper <URL>]                     %sURL (mapper.pl) for displaying host location\n", 
	  newLine);

  fprintf(fp, "    [-V             | --version]                          %sOutput version information and exit\n", newLine);
  fprintf(fp, "    [-X <max num TCP sessions> ]                          %sMax num. TCP sessions ntop can handle (default %u)\n", 
	  newLine, myGlobals.runningPref.maxNumSessions);

/*  Please keep long-only options alphabetically ordered */

  fprintf(fp, "    [--disable-instantsessionpurge]                       %sDisable instant FIN session purge\n", newLine);
  fprintf(fp, "    [--disable-mutexextrainfo]                            %sDisable extra mutex info\n", newLine);
#ifdef MAKE_WITH_SCHED_YIELD
  fprintf(fp, "    [--disable-schedyield]                                %sTurn off sched_yield() calls, if ntop is deadlocking on them\n", newLine);
#endif
  fprintf(fp, "    [--disable-stopcap]                                   %sCapture packets even if there's no memory left\n", newLine);
  fprintf(fp, "    [--fc-only]                                           %sDisplay only Fibre Channel statistics\n", newLine);
  fprintf(fp, "    [--no-fc]                                             %sDisable processing & Display of Fibre Channel\n", newLine);
  fprintf(fp, "    [--instance]                                          %sSet log name for this ntop instance\n", newLine);
  fprintf(fp, "    [--no-invalid-lun]                                    %sDon't display Invalid LUN information\n", newLine);
  fprintf(fp, "    [--p3p-cp]                                            %sSet return value for p3p compact policy, header\n", newLine);
  fprintf(fp, "    [--p3p-uri]                                           %sSet return value for p3p policyref header\n", newLine);
  fprintf(fp, "    [--skip-version-check]                                %sSkip ntop version check\n", newLine);
#ifdef MAKE_WITH_SSLWATCHDOG_RUNTIME
  fprintf(fp, "    [--ssl-watchdog]                                      %sUse ssl watchdog (NS6 problem)\n", newLine);
#endif

 fprintf(fp, "\n"
	 "NOTE\n"
	 "    * You can configure further ntop options via the web\n"
	 "      interface [Menu Admin -> Config].\n"
	 "    * The command line options are not permanent, i.e. they\n"
	 "      are not persistent across ntop initializations.\n"
	 "\n");
  
#ifdef WIN32
  printAvailableInterfaces();
#endif
}

/* *********************************** */

static void verifyOptions (void) {

#ifdef HAVE_OPENSSL
    if((myGlobals.runningPref.webPort == 0) && (myGlobals.runningPref.sslPort == 0)) {
        printf("WARNING: both -W and -w are set to 0. The web interface will be disabled.\n");
#else
        if(myGlobals.runningPref.webPort == 0) {
            printf("WARNING: -w is set to 0. The web interface will be disabled.\n");
#endif

            traceEvent(CONST_TRACE_WARNING, "The web interface will be disabled");
            traceEvent(CONST_TRACE_INFO, "If enabled, the rrd plugin will collect data");
            traceEvent(CONST_TRACE_INFO, "If enabled, the NetFlow and/or sFlow plugins will collect and/or transmit data");
            traceEvent(CONST_TRACE_INFO, "This may or may not be what you want");
            traceEvent(CONST_TRACE_INFO, "but without the web interface you can't set plugin parameters");
            myGlobals.webInterfaceDisabled = 1;
    }

    /*
     * Must start run as root since opening a network interface
     * in promiscuous mode is a privileged operation.
     * Verify we're running as root, unless we are reading data from a file
     */

    if(myGlobals.runningPref.rFileName != NULL) {
      return;
    }

#ifndef WIN32    
    if ((myGlobals.runningPref.disablePromiscuousMode != 1) &&
        getuid() /* We're not root */
	&& myGlobals.runningPref.devices
	&& strcmp(myGlobals.runningPref.devices, "none")) {
        char *theRootPw, *correct, *encrypted;
        struct passwd *pw = getpwuid(0);

        myGlobals.userId  = getuid();
        myGlobals.groupId = getgid();

        traceEvent(CONST_TRACE_WARNING, "You need root capabilities to capture network packets.");

        if(strcmp(pw->pw_passwd, "x") == 0) {
#ifdef HAVE_SHADOW_H
            /* Use shadow passwords */
            struct spwd *spw;
      
            spw = getspnam("root");
            if(spw == NULL) {
	      traceEvent(CONST_TRACE_INFO, "Unable to read shadow passwords. Become root first and start ntop again");
	      traceEvent(CONST_TRACE_INFO, "or add -s to your startup parameters (you won't be able to capture");
	      traceEvent(CONST_TRACE_INFO, "from a NIC but you can via NetFlow/sFlow)");
	      exit (-1);
            } else
	      correct = spw->sp_pwdp;
#else
            traceEvent(CONST_TRACE_ERROR, "Sorry: I cannot change user as your system uses and unsupported password storage mechanism.");
            traceEvent(CONST_TRACE_ERROR, "Please restart ntop with root capabilities");
            exit (-1);
#endif
        } else
            correct = pw->pw_passwd;

        theRootPw = getpass("Please enter the root password: ");
        encrypted = crypt(theRootPw, correct);

        if(strcmp(encrypted, correct) == 0) {
            traceEvent(CONST_TRACE_INFO, "The root password is correct");

            if(setuid(0) || setgid(0)) {
                traceEvent(CONST_TRACE_ERROR, "Sorry I'm unable to become root. Please check whether this application");
                traceEvent(CONST_TRACE_ERROR, "has the sticky bit set and the owner is %s. Otherwise",
#ifdef DARWIN
                           "root:wheel"
#else
                           "root:root"
#endif
                    );
                traceEvent(CONST_TRACE_FATALERROR, "please run ntop as root.");
                exit (18);
            }
        } else {
            traceEvent(CONST_TRACE_ERROR, "The specified root password is not correct.");
            traceEvent(CONST_TRACE_FATALERROR, "Sorry, %s uses network interface(s) in promiscuous mode, "
                       "so it needs root permission to run.\n", myGlobals.program_name);
            exit(19);
        }
    } else if (myGlobals.runningPref.disablePromiscuousMode == 1)
        traceEvent(CONST_TRACE_WARNING,
                   "-s set so will ATTEMPT to open interface w/o promisc mode "
                   "(this will probably fail below)");
#endif /* WIN32 */

    return;
}

/* ************************************ */

#if defined(MEMORY_DEBUG) && (MEMORY_DEBUG == 4)
static void abortfn(enum mcheck_status status) {

#ifdef HAVE_BACKTRACE
  int i;
  void *array[20];
  size_t size;
  char **strings;

  /* Grab the backtrace before we do much else... */
  size = backtrace(array, 20);
  strings = (char**)backtrace_symbols(array, size);
#endif

  switch(status) {
    case MCHECK_HEAD:
      traceEvent(CONST_TRACE_ERROR, "MCHECK_HEAD: modified before block");
      break;
    case MCHECK_TAIL:
      traceEvent(CONST_TRACE_ERROR, "MCHECK_TAIL: modified after block");
      break;
    case MCHECK_FREE:
      traceEvent(CONST_TRACE_ERROR, "MCHECK_FREE: already freed");
      break;
  }

#ifdef HAVE_BACKTRACE
  if (size >= 2) {
    traceEvent(CONST_TRACE_INFO, "MCHECK: backtrace is:");
    for (i=0; i<size; i++) {
      traceEvent(CONST_TRACE_ERROR, "MCHECK: %2d. %s", i, strings[i]);
    }
  }
#endif /* HAVE_BACKTRACE */

  traceEvent(CONST_TRACE_FATALERROR, "MCHECK: %d", status);

}
#endif

/* That's the meat */
#ifdef WIN32
int ntop_main(int argc, char *argv[]) {
#else
int main(int argc, char *argv[]) {
#endif
  int i, rc, userSpecified;
  char ifStr[196] = {0};
  time_t lastTime, endTime;
  char *cmdLineBuffer, *readBuffer, *readBufferWork;
  FILE *fd;
  struct stat fileStat;
  int effective_argc;
  char **effective_argv;
  char main_buf[LEN_GENERAL_WORK_BUFFER];
#ifndef WIN32
  char lib[LEN_GENERAL_WORK_BUFFER],
       env[LEN_GENERAL_WORK_BUFFER],
       buf[LEN_GENERAL_WORK_BUFFER];
#endif

  /*
  unsigned long driveSerial;
  if(get_serial("C:\\", &driveSerial))
	  printf("C:\\ Serial Number: %u\n", driveSerial);
  else
printf("Unable to read serial number\n");
		exit(0);
		*/

/* Don't move this below nor above */
#if defined(MEMORY_DEBUG) && (MEMORY_DEBUG == 1)
  mtrace();
#elif defined(MEMORY_DEBUG) && (MEMORY_DEBUG == 3)
  initLeaks();
#elif defined(MEMORY_DEBUG) && (MEMORY_DEBUG == 4)
  mcheck(abortfn);
  printf("MEMORY_DEBUG 4 - mcheck() - remember you need to run at the console, without -d | --daemon\n");
#endif

  if(strstr(argv[0], "ntops"))
    static_ntop = 1;
  else
    static_ntop = 0;

  /* printf("Wait please: ntop is coming up...\n"); */

  /* VERY FIRST THING is to clear myGlobals, so myGlobals.ntopRunState can be used */
  memset(&myGlobals, 0, sizeof(myGlobals));
  setRunState(FLAG_NTOPSTATE_PREINIT);

  myGlobals.mainThreadId = pthread_self();

  initSignals();

#ifdef WIN32
  initWinsock32(); /* Necessary for initializing globals */
#endif

  /* *********************** */

  setRunState(FLAG_NTOPSTATE_INIT);

  cmdLineBuffer = (char*)malloc(LEN_CMDLINE_BUFFER) /* big just to be safe */;
  memset(cmdLineBuffer, 0, LEN_CMDLINE_BUFFER);

  readBuffer = (char*)malloc(LEN_FGETS_BUFFER) /* big just to be safe */;
  memset(readBuffer, 0, LEN_FGETS_BUFFER);

  safe_snprintf(__FILE__, __LINE__, cmdLineBuffer, LEN_CMDLINE_BUFFER, "%s ", argv[0]);

  /*
   * Prepend FORCE_RUNTIME_PARM from configureextra 
   */
  if((force_runtime != NULL) &&
     (force_runtime[0] != '\0')) {
    traceEvent(CONST_TRACE_ALWAYSDISPLAY, "NOTE: Run time parameter %s forced via configureextra",
               force_runtime);
    strncat(cmdLineBuffer, force_runtime, (LEN_CMDLINE_BUFFER - strlen(cmdLineBuffer) - 1));
    strncat(cmdLineBuffer, " ", (LEN_CMDLINE_BUFFER - strlen(cmdLineBuffer) - 1));
  }

  /* Now we process the parameter list, looking for a @filename
   *   We have to special case a few things --- since the OS processing removes "s
   *     --filter-expression "host a.b.c.d" becomes
   *     --filter-expression host a.b.c.d
   *     --filter-expression="host a.b.c.d" becomes
   *     --filter-expression=host a.b.c.d
   *   This causes --filter-expression "host" and a bogus "a.b.c.d"
   */
  for(i=1; i<argc; i++) {
    if(argv[i][0] != '@') {
#ifdef PARAM_DEBUG
      printf("PARAM_DEBUG: Parameter %3d is '%s'\n", i, argv[i]);
#endif
      readBufferWork = strchr(argv[i], '=');
      if (readBufferWork != NULL) {
        readBufferWork[0] = '\0';
        safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, argv[i]);
        safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, "=\"");
        safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, &readBufferWork[1]);
        safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, "\" ");
      } else {
	readBufferWork = strchr(argv[i], ' ');
	if (readBufferWork != NULL) {
	  safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, "\"");
	  safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, argv[i]);
	  safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, "\" ");
	} else {
	  safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, argv[i]);
	  safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, " ");
	}
      }
    } else {

#ifdef PARAM_DEBUG
      printf("PARAM_DEBUG: Requested parameter file, '%s'\n", &argv[i][1]);
#endif

      rc = stat(&argv[i][1], &fileStat);
      if (rc != 0) {
	if (errno == ENOENT) {
	  printf("ERROR: Parameter file %s not found/unable to access\n", &argv[i][1]);
	} else {
	  printf("ERROR: %d in stat(%s, ...)\n", errno, &argv[i][1]);
	}
        free(cmdLineBuffer);
	return(-1);
      }

#ifdef PARAM_DEBUG
      printf("PARAM_DEBUG: File size %d\n", fileStat.st_size);
#endif

      fd = fopen(&argv[i][1], "rb");
      if (fd == NULL) {
	printf("ERROR: Unable to open parameter file '%s' (%d)...\n", &argv[i][1], errno);
        free(cmdLineBuffer);
	return(-1);
      }

      printf("   Processing file %s for parameters...\n", &argv[i][1]);

      for (;;) {
	readBufferWork = fgets(readBuffer, min(LEN_FGETS_BUFFER, fileStat.st_size), fd);
	/* On EOF, we're finished */
	if (readBufferWork == NULL) {
	  break;
	}
#ifdef PARAM_DEBUG
	printf("PARAM_DEBUG: fgets() '%s'\n", readBufferWork);
#endif

	/* Strip out any comments */
	readBufferWork = strchr(readBuffer, '#');
	if (readBufferWork != NULL) {
	  readBufferWork[0] = ' ';
	  readBufferWork[1] = '\0';
	}

	/* Replace the \n by a space, so at the end the buffer will
	 * look indistinguishable...
	 */
	readBufferWork = strchr(readBuffer, '\n');
	if(readBufferWork != NULL) {
	  readBufferWork[0] = ' ';
	  readBufferWork[1] = '\0';
	}

	readBufferWork = strchr(readBuffer, '@');
	if(readBufferWork != NULL) {
	  printf("FATAL ERROR: @command in file ... nesting is not permitted!\n\n");
	  exit(-1);
	}

#ifdef PARAM_DEBUG
	printf("PARAM_DEBUG:      -> '%s'\n", readBuffer);
#endif
	safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, " ");
	safe_strncat(cmdLineBuffer, LEN_CMDLINE_BUFFER, readBuffer);
      }

      fclose(fd);
    }
  }
  free(readBuffer);

  /* Strip trailing spaces */
  while((strlen(cmdLineBuffer) > 1) && 
        (cmdLineBuffer[strlen(cmdLineBuffer)-1] == ' ')) {
      cmdLineBuffer[strlen(cmdLineBuffer)-1] = '\0';
  }

  effective_argv = buildargv(cmdLineBuffer); /* Build a new argv[] from the string */
  free(cmdLineBuffer);

 /* count effective_argv[] */
  effective_argc = 0;
  while (effective_argv[effective_argc] != NULL) {
      effective_argc++;
  }
#ifdef PARAM_DEBUG
  for(i=0; i<effective_argc; i++) {
      printf("PARAM_DEBUG:    %3d. '%s'\n", i, effective_argv[i]);
  }
#endif

  /*
   * Initialize all global run-time parameters to reasonable values
   */
  initNtopGlobals(effective_argc, effective_argv, argc, argv);

  /*
   * Parse command line options to the application via standard system calls
   * Command-line options take precedence over saved preferences. 
   */
  loadPrefs(effective_argc, effective_argv);
  userSpecified = parseOptions(effective_argc, effective_argv);

  verifyOptions();

  traceEvent(CONST_TRACE_ALWAYSDISPLAY, "ntop v.%s", version);
  traceEvent(CONST_TRACE_ALWAYSDISPLAY, "Configured on %s, built on %s.", configureDate, buildDate);
  traceEvent(CONST_TRACE_ALWAYSDISPLAY, "Copyright 1998-2007 by %s", author);
  traceEvent(CONST_TRACE_ALWAYSDISPLAY, "Get the freshest ntop from http://www.ntop.org/");
 
#ifndef WIN32
  if(getDynamicLoadPaths(main_buf, sizeof(main_buf), lib, sizeof(lib), env, sizeof(env)) == 0) {
    traceEvent(CONST_TRACE_ALWAYSDISPLAY, "NOTE: ntop is running from '%s'", main_buf);
    traceEvent(CONST_TRACE_ALWAYSDISPLAY, "NOTE: (but see warning on man page for the --instance parameter)");
    if(strcmp(main_buf, lib) != 0) 
      traceEvent(CONST_TRACE_ALWAYSDISPLAY, "NOTE: ntop libraries are in '%s'", lib);
  } else {
    traceEvent(CONST_TRACE_NOISY, "NOTE: Unable to establish where ntop is running from");
  }
#endif

  traceEvent(CONST_TRACE_ALWAYSDISPLAY, "Initializing ntop");

  reportValues(&lastTime);

  if(myGlobals.runningPref.P3Pcp != NULL)
      traceEvent(CONST_TRACE_ALWAYSDISPLAY, "P3P: Compact Policy is '%s'",
		 myGlobals.runningPref.P3Pcp);

  if(myGlobals.runningPref.P3Puri != NULL)
      traceEvent(CONST_TRACE_ALWAYSDISPLAY, "P3P: Policy reference uri is '%s'",
		 myGlobals.runningPref.P3Puri);

  if (!myGlobals.runningPref.printIpOnly && (myGlobals.runningPref.fcNSCacheFile != NULL)) {
      processFcNSCacheFile (myGlobals.runningPref.fcNSCacheFile);
  }
  
  initNtop(myGlobals.runningPref.devices);

  /* create the main listener */
#ifdef HAVE_OPENSSL
  init_ssl();
#endif

  if(!myGlobals.webInterfaceDisabled)
      initWeb();

  /* ******************************* */

  if(myGlobals.runningPref.rFileName != NULL)
    strncpy(ifStr, CONST_PCAP_NW_INTERFACE_FILE, sizeof(ifStr));
  else {
    ifStr[0] = '\0';

    for (i=0; i<myGlobals.numDevices; i++) {
      char tmpBuf[64];

      safe_snprintf(__FILE__, __LINE__, tmpBuf, sizeof(tmpBuf), "%s%s", 
		    (i>0) ? "," : "",
		    (myGlobals.device[i].humanFriendlyName != NULL) ?
		    myGlobals.device[i].humanFriendlyName :
		    myGlobals.device[i].name);
      strncat(ifStr, tmpBuf, sizeof(ifStr)-strlen(ifStr)-1)[sizeof(ifStr)-1] = '\0';
    }
  }

  if((ifStr == NULL) || (ifStr[0] == '\0')) {
    traceEvent(CONST_TRACE_ERROR, "No interface has been selected. Capture not started...");
    createDummyInterface("none");
  } else
    traceEvent(CONST_TRACE_ALWAYSDISPLAY, "Listening on [%s]", ifStr);

  if(!static_ntop) {
    traceEvent(CONST_TRACE_ALWAYSDISPLAY, "Loading Plugins");
    loadPlugins();
    traceEvent(CONST_TRACE_NOISY, "Starting Plugins");
    startPlugins();
    traceEvent(CONST_TRACE_NOISY, "Plugins started... continuing with initialization");
  }

  /* ******************************* */
  
#ifndef WIN32
  saveNtopPid();
#endif

  checkUserIdentity(userSpecified);

  /* ******************************* */

  addDefaultAdminUser();

  initReports();

  traceEvent(CONST_TRACE_NOISY, "MEMORY: Base interface structure (no hashes loaded) is %.2fMB each",
	     xvertDOT00MB(sizeof(NtopInterface)));
  traceEvent(CONST_TRACE_NOISY, "MEMORY:     or %.2fMB for %d interfaces",
	     xvertDOT00MB(myGlobals.numDevices*sizeof(NtopInterface)),
	     myGlobals.numDevices);
  traceEvent(CONST_TRACE_NOISY, "MEMORY: ipTraffixMatrix structure (no TrafficEntry loaded) is %.2fMB",
	     xvertDOT00MB(myGlobals.ipTrafficMatrixMemoryUsage));

#ifdef NOT_YET  
  traceEvent(CONST_TRACE_NOISY, "MEMORY: fcTrafficMatrix structure (no TrafficEntry loaded) is %.2fMB",
	     xvertDOT00MB(myGlobals.fcTrafficMatrixMemoryUsage));
#endif  

  /*
   * OK, ntop is up... if we have't failed during init, start running with the actual packet capture...
   *
   * A separate thread handles packet sniffing
   */
  startSniffer();

#ifndef WIN32

  while(myGlobals.ntopRunState == FLAG_NTOPSTATE_RUN) {

    ntopSleepWhileSameState(PARM_SLEEP_LIMIT);

    /* Periodic recheck of the version status */
    if((myGlobals.checkVersionStatusAgain > 0) && 
       (time(NULL) > myGlobals.checkVersionStatusAgain) &&
       (myGlobals.ntopRunState == FLAG_NTOPSTATE_RUN))
      checkVersion(NULL);

  }

  traceEvent(CONST_TRACE_INFO, "THREADMGMT[t%lu]: Main thread shutting down", pthread_self());
  endTime = time(NULL) + PARM_SLEEP_LIMIT + 2;

  while((myGlobals.ntopRunState != FLAG_NTOPSTATE_TERM) &&
        (time(NULL) < endTime)) {
    sleep(1);
  }
  traceEvent(CONST_TRACE_INFO, "THREADMGMT[t%lu]: Main thread terminating", pthread_self());

  memset(&buf, 0, sizeof(buf));
  runningThreads(buf, sizeof(buf), 0);
  if(buf[0] != '\0') 
    traceEvent(CONST_TRACE_INFO, "THREADMGMT[t%lu]: Still running threads%s", pthread_self(), buf);

  traceEvent(CONST_TRACE_INFO, "===================================");
  traceEvent(CONST_TRACE_INFO, "        ntop is shutdown...        ");
  traceEvent(CONST_TRACE_INFO, "===================================");

#endif

  return(0);
}