// UtilityConfig.cpp
//
// Copyright (C) 2011, ARM Research Labs, LLC.
// See www.armresearch.com for the copyright terms.
//
// This file implements the common functionality for the configuration
// utilities.

#include <cerrno>
#include <cstring>
#include <unistd.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <stdexcept>
#include <sstream>
#include <iostream>
#include <fstream>
#include <vector>

#include "UtilityConfig.hpp"

using namespace std;

//////////////////////////////////////////////////////////////////////////////////////////////////////////
// Configuration. ////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////

// Initialize OS-dependent constants.
#ifdef WIN

//  Windows OS.
const std::string UtilityConfig::SampleIgnoreListFile("C:\\SNF\\GBUdbIgnoreList.txt.sample");

const std::string UtilityConfig::RulebaseDownloadCommand("FIX THIS");

const std::string UtilityConfig::RulebaseDownloadStatusFile("FIX THIS");

const std::string ScriptNameKey("FIX THIS"); ///< Text to replace with script name.
const std::string SnifferPathKey("FIX THIS"); ///< Text to replace with directory of the rulebase.

const std::string UtilityConfig::SampleRulebaseScriptFile("C:\\SNF\\getRulebase.sample");

const std::string UtilityConfig::OperatingSystemType("Windows");

#else

// *nix OS.

// SCRIPT is replaced with the full path of the script run,
// SNIFFER_PATH is replaced with the path of the rulebase.
const std::string UtilityConfig::RulebaseDownloadCommand
("(cd SNIFFER_PATH; touch UpdateReady.txt; chown snfuser UpdateReady.txt; su -m snfuser -c SCRIPT)");

const std::string ScriptNameKey("SCRIPT"); ///< Text to replace with script name.
const std::string SnifferPathKey("SNIFFER_PATH"); ///< Text to replace with directory of the rulebase.

// SNIFFER_PATH is replaced with the path of the rulebase.
const std::string UtilityConfig::RulebaseDownloadStatusFile("SNIFFER_PATH/getRulebase.status");

#ifdef DEFAULT_DATA_DIR
//  *nix, DEFAULT_DATA_DIR is specified on the compile command line.
const std::string UtilityConfig::SampleIgnoreListFile(DEFAULT_DATA_DIR "/GBUdbIgnoreList.txt.sample");
#else
// Not Windows, and DEFAULT_DATA_DIR is not specified on the compile
// command line.  In this case, we don't know the path for the sample
// ignore list file.
#error DEFAULT_DATA_DIR must be defined by -DDEFAULT_DATA_DIR="..." when compiling.
#endif

#ifdef SBIN_DIR
//  *nix, SBIN_DIR is specified on the compile command line.
const std::string UtilityConfig::SampleRulebaseScriptFile(SBIN_DIR "/getRulebase.sample");
#else
// Not Windows, and SBIN_DIR is not specified on the compile
// command line.  In this case, we don't know the path for the sample
// ignore list file.
#error SBIN_DIR must be defined by -DSBIN_DIR="..." when compiling.
#endif

#ifdef SNF_OSTYPE
//  *nix, SNF_OSTYPE is specified on the compile command line.
const std::string UtilityConfig::OperatingSystemType(SNF_OSTYPE);
#else
// Not Windows, and SNF_OSTYPE is not specified on the compile command
// line.  In this case, we don't know the operating system.
#error SNF_OSTYPE must be defined by -DSNF_OSTYPE="..." when compiling.
#endif

#endif

/// Verbose command-line input.
const string VerboseKey("-v");

/// Explain command-line input.
const string ExplainKey("-explain");

/// Help command-line input.
const string HelpKey("-h");

/// Setup command-line input.
const string SetupKey("-setup");

/// Repair command-line input.
const string RepairKey("-repair");

/// Start sniffer command-line input.
const string StartSnifferKey("-start");

/// Stop sniffer command-line input.
const string StopSnifferKey("-stop");

/// Configuration file command-line input.
const string ConfigFileKey("-config=");

/// License ID command-line input.
const string LicenseIdKey("-id=");

/// Authentication command-line input.
const string AuthenticationKey("-auth=");

/// String that indicates a successful rulebase download.
//
// This string must be in the last line of the getRulebase status
// file.  Note: The getRulebase status file is created by the
// getRulebase script, has the name getRulebase.status, and is in the
// same directory as the rulebase files.
const string SuccessKey("Success");

const string LicenseSearchString = "LICENSE_ID=";
const string AuthSearchString = "AUTHENTICATION=";

const string IdentityElementName = "identity";
const string LicenseAttributeName = "licenseid";
const string AuthenticationAttributeName = "authentication";

//////////////////////////////////////////////////////////////////////////////////////////////////////////
// End of configuration. /////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////

UtilityConfig::UtilityConfig() :
    LicenseIdIsSpecified(false), AuthenticationIsSpecified(false)
{

    SetExplain(false);
    SetVerbose(false);
    SetHelp(false);
    SetSetupRepair(false);
    SetStartSniffer(false);
    SetStopSniffer(false);

}    

void
UtilityConfig::CreateDefaultConfigFile(std::string SampleConfigFile) {

    std::string File = GetConfigFileName();

    if (!FileExists(File)) {

	if (!Explain()) {

	    SaveFile.CreateBackupFile(File);

	}

	// Create the config file.
        Copy(SampleConfigFile, File);

    }

    SetMode(File, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);                       // Set permissions.
    SetOwnerGroup(File);                                                        // Set to sniffer user.

}

void
UtilityConfig::LoadConfig() {

    if (Verbose()) {

	cout << "Using configuration file " << GetConfigFileName() << ".\n";

    }

    // Load the data.
    try {

	CFGData.initializeFromFile(GetConfigFileName().c_str());

    } catch(...) {

	string Temp;

	Temp = "Error reading configuration file " + GetConfigFileName();
	Temp += ".";
	throw std::runtime_error(Temp);

    }

    if ( (CFGData.paths_workspace_path.length() == 0) ||
	 (CFGData.paths_rulebase_path.length() == 0) || 
	 (CFGData.paths_log_path.length() == 0) || 
	 (CFGData.update_script_call.length() == 0) || 
	 (CFGData.node_identity.length() == 0) ) {

	string Temp;

	Temp = "The configuration file " + GetConfigFileName();
	Temp += " did not have the necessary specification of one or more paths:\n";
	Temp += "\n  Workspace path:  " + CFGData.paths_workspace_path;
	Temp += "\n  Rulebase path:  " + CFGData.paths_rulebase_path;
	Temp += "\n  Log path:  " + CFGData.paths_log_path;
	Temp += "\n  Update script:  " + CFGData.update_script_call;
	Temp += "\n  Identity file:  " + CFGData.node_identity;
	throw std::runtime_error(Temp);

    }

}

string
UtilityConfig::GetPlatformContents(void) {

    return CFGData.PlatformElementContents;

}

string
UtilityConfig::GetConfigFileName(void) {

    return ConfigFileName;

}

void
UtilityConfig::SetConfigFileName(string Name) {

    ConfigFileName = Name;

}

string
UtilityConfig::GetWorkspacePath(void) {

    return CFGData.paths_workspace_path;

}

string
UtilityConfig::GetRulebasePath(void) {

    return CFGData.paths_rulebase_path;

}

string
UtilityConfig::GetLogPath(void) {

    return CFGData.paths_log_path;

}

std::string
UtilityConfig::GetStatusSecondLogFileName(void) {

    std::string FileName = CFGData.paths_log_path + CFGData.node_licenseid + ".status.second";

    if (CFGData.Status_SecondReport_Append_OnOff) {

	AppendDatestampToLogFileName(&FileName);

    }

    FileName += ".log.xml";

    return FileName;

}

std::string
UtilityConfig::GetStatusMinuteLogFileName(void) {

    std::string FileName = CFGData.paths_log_path + CFGData.node_licenseid + ".status.minute";

    if (CFGData.Status_MinuteReport_Append_OnOff) {

	AppendDatestampToLogFileName(&FileName);

    }

    FileName += ".log.xml";

    return FileName;

}

void
UtilityConfig::AppendDatestampToLogFileName(std::string *FileBaseName) {


    char TimestampBuffer[20];
    tm *BrokenDownTime;
    time_t Timestamp;

    time(&Timestamp);

    if (CFGData.Logs_Rotation_LocalTime_OnOff) {

	BrokenDownTime = localtime(&Timestamp);

    } else {

	BrokenDownTime = gmtime(&Timestamp);

    }

    snprintf(TimestampBuffer, sizeof TimestampBuffer, "%04d%02d%02d",
	     BrokenDownTime->tm_year+1900,
	     BrokenDownTime->tm_mon+1,
	     BrokenDownTime->tm_mday);

    *FileBaseName += ".";
    *FileBaseName += TimestampBuffer;

}

string
UtilityConfig::GetIdentityFileName(void) {

    return CFGData.node_identity;

}

string
UtilityConfig::GetRulebaseScriptName(void) {

    return CFGData.update_script_call;

}

string
UtilityConfig::GetIgnoreListFileName(void) {

    return GetWorkspacePath() + "GBUdbIgnoreList.txt";

}

string
UtilityConfig::GetRulebaseFileName(void) {

    std::string Name;

    Name = GetRulebasePath();
    Name += LicenseId + ".snf";

    return Name;

}

string
UtilityConfig::GetOperatingSystemType(void) {

    return OperatingSystemType;

}

void
UtilityConfig::LoadInfo(){

    if ("OpenBSD" == OperatingSystemType) {

	PostfixMainCfPath = "/usr/local/etc/postfix/main.cf";
	PostfixMasterCfPath = "/usr/local/etc/postfix/master.cf";
	SnifferStartScriptDir = "/usr/local/sbin/";

    } else if ("FreeBSD" == OperatingSystemType) {

	PostfixMainCfPath = "/etc/postfix/main.cf";
	PostfixMasterCfPath = "/etc/postfix/master.cf";
	SnifferStartScriptDir = "/usr/local/etc/rc.d/";

    } else if ("Ubuntu" == OperatingSystemType) {

	PostfixMainCfPath = "/etc/postfix/main.cf";
	PostfixMasterCfPath = "/etc/postfix/master.cf";
	SnifferStartScriptDir = "/etc/init.d/";

    } else if ("RedHat" == OperatingSystemType) {

	PostfixMainCfPath = "/etc/postfix/main.cf";
	PostfixMasterCfPath = "/etc/postfix/master.cf";
	SnifferStartScriptDir = "/etc/init.d/";

    } else if ("Suse" == OperatingSystemType) {

	PostfixMainCfPath = "/etc/postfix/main.cf";
	PostfixMasterCfPath = "/etc/postfix/master.cf";
	SnifferStartScriptDir = "/etc/init.d/";

    } else {

	ostringstream Temp;

	Temp << "Internal error in UtilityConfig::LoadInfo:  Invalid value of OperatingSystemType:  "
	     << OperatingSystemType;

	throw std::runtime_error(Temp.str());

    }

}

void
UtilityConfig::LoadCredentials(void) {

    if(0 < CFGData.node_identity.length()) {                                    // If an identity path was provided
        ConfigurationData Identity(CFGData.node_identity.c_str());              // then get the data from that file.
        ConfigurationElement IdentityReader("snf");                             // Create an Identity reader and
        IdentityReader                                                          // configure it.
            .Element("identity")
                .Attribute("licenseid", CFGData.node_licenseid)
                .Attribute("authentication", CFGData.node_authentication)
            .End("identity")
        .End("snf");
        IdentityReader.interpret(Identity);                                     // Then read the data.
    }

}

UtilityConfig::StatusCheckMethod
UtilityConfig::GetPreferredStatusCheckMethod(void) {

    if (CFGData.XCI_OnOff) {

	return StatusCheckXci;

    }

    if (CFGData.Status_SecondReport_Log_OnOff) {

	return StatusCheckSecond;

    }

    if (CFGData.Status_MinuteReport_Log_OnOff) {

	return StatusCheckMinute;

    }

    return StatusCheckNotAvailable;

}

std::string
UtilityConfig::GetSnifferStatusReport() {

    std::string StatusReport;
    int SleepTime_msec;
    int TimeoutTime_msec;

    switch (GetPreferredStatusCheckMethod()) {

    case StatusCheckXci:

	StatusReport = GetReportViaXci();
	break;

    case StatusCheckSecond:

	SleepTime_msec = 1000;
	TimeoutTime_msec = 7000;
	StatusReport = GetReportViaLogFile(&UtilityConfig::GetStatusSecondLogFileName, SleepTime_msec, TimeoutTime_msec);
	break;

    case StatusCheckMinute:

	SleepTime_msec = 10 * 1000;
	TimeoutTime_msec = 70 * 1000;
	std::cout << "Getting Sniffer status from status.minute log file (this takes about "
		  << TimeoutTime_msec / 1000 << " s)...";
	std::cout.flush();
	StatusReport = GetReportViaLogFile(&UtilityConfig::GetStatusMinuteLogFileName, SleepTime_msec, TimeoutTime_msec);
	std::cout << "done." << std::endl;
	break;

    default:
	{
	    std::string Temp;

	    Temp = "No method for determining Sniffer status is available.  ";
	    Temp += "Tried XCI, status.second logging, and status.minute logging.";
	    throw std::runtime_error(Temp);

	}

    }

    return StatusReport;

}

std::string
UtilityConfig::GetReportViaXci() {

    if (Verbose()) {

        std::cout << "Getting Sniffer status report via XCI...";
        std::cout.flush();

    }

    bool ConnectSuccess = false;
    std::string ResultString;
    const std::string RequestString("<snf><xci><report><request><status class='second'/></request></report></xci></snf>");

    // Code copied from SNFClient.

    // Max time in this loop should be (100*50ms) = 5 seconds per try times
    // 10 tries = 50 seconds, plus (9*500ms) = 4.5 secs for re-tries. ~ 55 secs.

    const int ResultBufferSize = 4096;
    char ResultBuffer[ResultBufferSize+1];                                      // Make an oversize buffer for the answer.
    memset(ResultBuffer, 0, sizeof(ResultBuffer));                              // Set the entire thing to nulls.

    const int Tries = 20;                                                       // How many times to try this.
    Sleeper SleepAfterAttempt(100);                                             // How long to sleep between attempts.

    const int OpenTries = 90;                                                   // How many tries at opening.
    Sleeper WaitForOpen(10);                                                    // How long to wait for an open cycle.

    const int ReadTries = 900;                                                  // How many tries at reading.
    Sleeper SleepBeforeReading(10);                                             // How long to pause before reading.

    /*
    ** 20 * 100ms = 2 seconds for all tries.
    ** 90 * 10ms = 900ms for a failed connection.
    ** 900 * 10ms = 9 seconds for a failed read.
    **
    ** Approximate wait for can't connect = 2.0 + (20 * 0.9) = ~ 20.0 seconds.
    ** Maximum impossible wait = 2.0 + (0.9 * 20) + (9.0 * 20) = 200.0 seconds.
    */

    for(int tryagain = Tries; (0<tryagain) && (!ConnectSuccess); tryagain--) {  // Try a few times to get this done.
        try {
            ResultString = "";                                                  // Clear our result string.
            TCPHost SNFServer(9001);                                            // Create connection to server.
            SNFServer.makeNonBlocking();                                        // Make it non-blocking.

            for(int tries = OpenTries; 0 < tries; tries--) {                    // Wait & Watch for a good connection.
                try { SNFServer.open(); } catch(...) {}                         // Try opening the connection.
                if(SNFServer.isOpen()) break;                                   // When successful, let's Go!
                else WaitForOpen();                                             // When not successful, pause.
            }

            if(SNFServer.isOpen()) {                                            // If we have a good connection:

                SNFServer.transmit(
                  RequestString.c_str(), RequestString.length());               // Send the request.

                for(int tries = ReadTries; 0 < tries; tries--) {                // Try to read the result a few times.
                    SleepBeforeReading();                                       // Provide some time for each try.
                    memset(ResultBuffer, 0, sizeof(ResultBuffer));              // Clear the buffer.
                    SNFServer.receive(ResultBuffer, ResultBufferSize);          // Receive the answer.
                    ResultString.append(ResultBuffer);
                    if(string::npos ==
                      ResultString.rfind("</snf>",ResultString.length())) {     // If we don't have the end yet.
                        continue;                                               // Try again.
                    } else {                                                    // If we got to end of line
                        ConnectSuccess = true;                                  // Success!
                        break;                                                  // We're done.
                    }
                }
                SNFServer.close();                                              // No need for our connection after that.
            }
        } catch(...) { }                                                        // Ignore errors for now.
        if(!ConnectSuccess) SleepAfterAttempt();                                // Pause for a moment before trying again..
    }

    if(!ConnectSuccess) {                                                       // If no connection then Sniffer isn't running.

	if (Verbose()) {

            std::cout << "no response...";

	}

	return "";

    }

    // At this point we should have a usable result.
    if(Debug()) { cout << ResultString << endl; }                               // In debug, show the result string.

    snf_xci Reader(ResultString);                                               // Interpret the data and check for
    if(Reader.bad()) {                                                          // a proper read. If it was bad...
	std::string Temp;

	Temp = "Bad result from Sniffer:\n" + ResultString;
	throw std::runtime_error(Temp);

    }

    if(0 < Reader.xci_error_message.length()) {                                 // If the result was a general error...
	std::string Temp;

	Temp = "XCI error when determing status of Sniffer:  " + Reader.xci_error_message;
	throw std::runtime_error(Temp);

    }

    if (Verbose()) {

	std::cout << "response received...";

    }

    return Reader.report_response;

}

std::string
UtilityConfig::GetReportViaLogFile(GetLogFileName GetLogFileNamePtr, int SleepTime_msec, int TimeoutTime_msec) {

    std::string LogFileName;

    LogFileName = (this->*GetLogFileNamePtr)();

    if (Verbose()) {

        cout << "\nGetting Sniffer status report via log file " << LogFileName << "...";
        std::cout.flush();

    }

    std::string InitialContents;

    InitialContents = ReadLastPartOfFile(LogFileName, LogFileReportSize);        // Read last part of log file.


    int ElapsedTime_msec = 0;

    while (ElapsedTime_msec < TimeoutTime_msec) {
	bool IncreasedTimeoutTime = false;                                      // TimeoutTime_msec can be increased
                                                                                // only once if the log file name changes.
	std::string NewLogFileName;
        Sleeper Sleep(SleepTime_msec);
        std::string FinalContents;

        Sleep();

        NewLogFileName = (this->*GetLogFileNamePtr)();

	if (!IncreasedTimeoutTime && (NewLogFileName != LogFileName)) {         // Filename changes if it contains a
                                                                                // date stemp and the time is close
                                                                                // to midnight.
	    TimeoutTime_msec *= 2;
	    IncreasedTimeoutTime = true;

	    if (Verbose()) {

		cout << "reading from " << NewLogFileName << "...";
		std::cout.flush();

	    }

	}

	LogFileName = NewLogFileName;

        FinalContents = ReadLastPartOfFile(LogFileName, LogFileReportSize);     // Read again.

        if ( (FinalContents.length() != 0) &&                                   // There is a report, and
             (InitialContents != FinalContents) ) {                             // the contents have changed.

            if (Verbose()) {

                cout << "report changed...";

            }

	    OutputVerboseEnd();

	    std::string::size_type StatsStartPos;                               // Index of start of <stats> element.
	    std::string::size_type StatsEndPos;                                 // Index of end of <stats> element.

	    StatsEndPos = FinalContents.rfind("</stats>");
	    if (std::string::npos == StatsEndPos) {

		throw std::runtime_error("Unable to interpret the status report:  No '</stats>' closing tag found.");

	    }

	    StatsStartPos = FinalContents.rfind("<stats ", StatsEndPos);
	    if (std::string::npos == StatsStartPos) {

		throw std::runtime_error("Unable to interpret the status report:  No '<stats>' tag found.");

	    }

            return FinalContents.substr(StatsStartPos);                         // Return the last <stats> element.

        }

	ElapsedTime_msec += SleepTime_msec;

    }

    if (Verbose()) {

	cout << "report unchanged...";

    }


    OutputVerboseEnd();

    return "";

}

void
UtilityConfig::CheckSnifferStatusReport(std::string StatusReport, std::string ApplicationName) {

    if (Verbose()) {

	cout << "Checking Sniffer status report...";

    }

    ConfigurationElement MyCFGReader("stats");                                  // Object to parse the XML.
    ConfigurationData MyCFGData(StatusReport.c_str(), StatusReport.length());   // Object that contains the XML.

    std::string PlatformContent;

    MyCFGReader
        .Element("version")
            .Element("platform", PlatformContent, "")
            .End("platform")
        .End("version")
    .End("stats");

    MyCFGReader.initialize();
    if (!MyCFGReader.interpret(MyCFGData)) {
	std::ostringstream Temp;

	Temp << "Error interpreting the Sniffer status report:\n" << StatusReport;
	throw std::runtime_error(Temp.str());

    }

    if (std::string::npos == PlatformContent.find(ApplicationName)) {           // Verify correct application.
	std::ostringstream Temp;

	Temp << "Error--The expected Sniffer application (" << ApplicationName
	     << ") isn't running.  The running application determined from the status report is "
	     << PlatformContent;
	throw std::runtime_error(Temp.str());

    }

    OutputVerboseEnd();

}

UtilityConfig::SnifferRunningStateEnum
UtilityConfig::GetRunningState(std::string ApplicationName) {

    if (Verbose()) {

	cout << "Checking whether " << ApplicationName << " is running...";
	cout.flush();

    }

    std::string StatusReport = GetSnifferStatusReport();

    OutputVerboseEnd();

    if (StatusReport.length() == 0) {

	return SnifferIsStopped;

    }

    CheckSnifferStatusReport(StatusReport, ApplicationName);

    return SnifferIsRunning;

}

void
UtilityConfig::SetupRepair(const std::string SampleIdentityFile) {

    RestoreMissingConfigFiles(SampleIdentityFile);
    SetOwnerPermissionsOfConfigFiles();

}

void
UtilityConfig::RestoreMissingConfigFiles(std::string SampleIdentityFile) {

    std::string File;

    File = GetIdentityFileName();

    if (!FileExists(File)) {

	if (!Explain()) {

	    SaveFile.CreateBackupFile(File);

	}

	// Create the config file.
        Copy(SampleIdentityFile, File);

    }

    File = GetRulebaseScriptName();

    if (!FileExists(File)) {

	if (!Explain()) {

	    SaveFile.CreateBackupFile(File);

	}

        Copy(SampleRulebaseScriptFile, File);                                   // Copy if !Explain().

    }

    File = GetIgnoreListFileName();

    if (!FileExists(File)) {

	if (!Explain()) {

	    SaveFile.CreateBackupFile(File);

	}

        Copy(SampleIgnoreListFile, File);

    }

    std::string LogDir = GetLogPath();

    if (!FileExists(LogDir)) {

        MkDir(LogDir);

    }

}

void
UtilityConfig::SetOwnerPermissionsOfConfigFiles() {


    std::string File;

    File = GetIdentityFileName();

    if (FileExists(File)) {

	SetMode(File, S_IRUSR | S_IWUSR | S_IRGRP);
	SetOwnerGroup(File);

    }

    File = GetRulebaseScriptName();

    if (FileExists(File)) {

	SetMode(File, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);

    }

    File = GetIgnoreListFileName();

    if (FileExists(File)) {

	SetMode(File, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
	SetOwnerGroup(File);

    }

    std::string LogDir = GetLogPath();

    if (FileExists(LogDir)) {

	SetMode(LogDir, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
	SetOwnerGroup(LogDir);

    }

}

void
UtilityConfig::UpdateRulebaseScriptCredentials() {

    std::string File = GetRulebaseScriptName();

    if (Verbose()) {

	cout << "Update authentication and license ID in the rulebase download script file " << File << "--\n";

    }

    ifstream Input;

    Input.open(File.c_str());                                                   // Read the contents.
    if (!Input) {
	string Temp;

	Temp = "Error opening rulebase download script file " + File;
	Temp += " for reading:  ";
	Temp += strerror(errno);
	throw std::runtime_error(Temp);
    }

    string Content;
    string Line;
    bool FoundLicense = false;
    bool FoundAuth = false;

    while (getline(Input, Line)) {

	if (CheckForString(Line, LicenseSearchString)) {                        // Check for license line.

	    if (FoundLicense) {                                                 // Second license line found?
		string Temp;

		Temp = "Rulebase sownload script file " + File;
		Temp += " has the wrong format:  Found two lines beginning with " + LicenseSearchString;
		throw std::runtime_error(Temp);

	    }

	    if (Verbose()) {

		cout << "  Modify line:  '" << Line << "'...\n";

	    }
	    FoundLicense = true;
	    Line = LicenseSearchString + LicenseId;                             // Add license line.
	    Line += " # Added by SNFSetup";

	}

	if (CheckForString(Line, AuthSearchString)) {                           // Check for authentication line.

	    if (FoundAuth) {                                                    // Second authentication line found?
		string Temp;

		Temp = "Rulebase download script file " + File;
		Temp += " has the wrong format:  Found two lines beginning with " + AuthSearchString;
		throw std::runtime_error(Temp);
	    }

	    if (Verbose()) {

		cout << "  Modify line:  '" << Line << "'...\n";

	    }
	    FoundAuth = true;
	    Line = AuthSearchString + Authentication;                           // Add authentication line.
	    Line += " # Added by SNFSetup";

	}

	Content += Line + "\n";

    }

    if (!FoundLicense || !FoundAuth) {
	string Temp;

	Temp = "Rulebase download script file " + File;
	Temp += " has the wrong format:  Missing required line beginning with '" + LicenseSearchString;
	Temp += "' or '" + AuthSearchString;
	Temp += "'";
	throw std::runtime_error(Temp);
    }

    if (!Input.eof()) {                                                         // Should be at end-of-file.
	string Temp;

	Temp = "Error reading the rulebase download script file " + File;
	Temp += ":  ";
	Temp += strerror(errno);
	throw std::runtime_error(Temp);
    }

    Input.close();
    if (Input.bad()) {
	string Temp;

	Temp = "Error closing the rulebase download script file " + File;
	Temp += " after reading:  ";
	Temp += strerror(errno);
	throw std::runtime_error(Temp);
    }


    if (!Explain()) {

	SaveFile.CreateBackupFile(File);

	ofstream Output;                                                            // Write the updated contents.

	Output.open(File.c_str(), ios::trunc);
	if (!Output) {
	    string Temp;

	    Temp = "Error opening rulebase download script file " + File;
	    Temp += " for writing:  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

	Output << Content;
	if (!Output) {
	    string Temp;

	    Temp = "Error writing the rulebase download script file " + File;
	    Temp += ":  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

	Output.close();
	if (!Output) {
	    string Temp;

	    Temp = "Error closing the rulebase download script file " + File;
	    Temp += " after writing:  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

    }

    OutputVerboseEnd();

}

void
UtilityConfig::DownloadRulebase() {

    if (Verbose()) {

	std::cout << "Downloading the rulebase...";
	std::cout.flush();

    }

    std::string Command;

    Command = RulebaseDownloadCommand;

    std::string::size_type ScriptIndex = Command.find(ScriptNameKey);

    if (ScriptIndex != std::string::npos) {                                     // Insert script full path?

	Command.replace(ScriptIndex, ScriptNameKey.length(), GetRulebaseScriptName());

    }

    std::string::size_type SnifferPathIndex = Command.find(SnifferPathKey);

    if (SnifferPathIndex != std::string::npos) {                                // Insert rulebase location?

	Command.replace(SnifferPathIndex, SnifferPathKey.length(), GetRulebasePath());

    }

    std::string StatusFile;                                                     // Construct download status file name.

    StatusFile = RulebaseDownloadStatusFile;

    SnifferPathIndex = StatusFile.find(SnifferPathKey);

    if (SnifferPathIndex != std::string::npos) {                                // Insert rulebase location?

	StatusFile.replace(SnifferPathIndex, SnifferPathKey.length(), GetRulebasePath());

    }

    if (!Explain()) {

	SaveFile.CreateBackupFile(GetRulebaseFileName());                       // Save the current rulebase file.

        if (0 != remove(StatusFile.c_str())) {                                  // Delete the status file.

            if (ENOENT != errno) {                                              // No error if the file doesn't exist.
		std::ostringstream Temp;

		Temp << "Unable to remove rulebase download status file " << StatusFile
		     << ":  " << strerror(errno);
		throw std::runtime_error(Temp.str());

	    }

	}

        if (std::system(Command.c_str()) != 0) {                                // Download the rulebase.
	    string Temp;

	    Temp = "Error running the command '" + Command;
	    Temp += "'.";
	    throw std::runtime_error(Temp);

	}

	ifstream Input;

        Input.open(StatusFile.c_str());                                         // Check the status.
	if (!Input) {
	    string Temp;

	    Temp = "Error opening rulebase download scriptstatus file " + StatusFile;
	    Temp += ":  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

	string Line;
	string PrevLine;
	string Content;

        while (getline(Input, Line)) {                                          // Read the last line.

	    PrevLine = Line;
	    Content += Line + "\n";

	}

        if (PrevLine.find(SuccessKey) == std::string::npos) {                   // Check the status.
	    string Temp;

	    Temp = "Error downloading the rulebase.  Rulebase download status:\n\n" + Content;
	    throw std::runtime_error(Temp);

	}

    }

    OutputVerboseEnd();

}

void
UtilityConfig::UpdateIdentityFile() {

    std::string File = GetIdentityFileName();

    if (Verbose()) {

	cout << "Update authentication and license ID in the identity file " << File << "--\n";

    }

    ifstream Input;

    Input.open(File.c_str());                                                   // Read the contents.
    if (!Input) {
	string Temp;

	Temp = "Error opening identity file " + File;
	Temp += " for reading:  ";
	Temp += strerror(errno);
	throw std::runtime_error(Temp);
    }

    ostringstream InputContents;

    if (!Input.eof()) {                                                         // Copy if there are characters.
                                                                                // Copying an empty file causes
	InputContents << Input.rdbuf();                                         // failbit to be set.

    }

    if (InputContents.bad() || InputContents.fail()) {
	std::string Temp;

	Temp = "Error reading identity file " + File;
	throw std::runtime_error(Temp);
    }

    Input.close();
    if (Input.bad()) {
	string Temp;

	Temp = "Error closing the identity file " + File;
	Temp += " after reading:  ";
	Temp += strerror(errno);
	throw std::runtime_error(Temp);
    }

    string Content = InputContents.str();

    try {

	ReplaceXmlAttribute(&Content, IdentityElementName, LicenseAttributeName, LicenseId);
	ReplaceXmlAttribute(&Content, IdentityElementName, AuthenticationAttributeName, Authentication);

    } catch (std::exception &e) {
	std::string Temp;

	Temp = "Error updating credentials for identity file " + File;
	Temp += ":  ";
	Temp += e.what();
	throw std::runtime_error(Temp);

    }

    if (!Explain()) {

	SaveFile.CreateBackupFile(File);

	ofstream Output;

	Output.open(File.c_str(), ios::trunc);
	if (!Output) {
	    string Temp;

	    Temp = "Error opening identity file " + File;
	    Temp += " for writing:  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

	Output << Content;
	if (!Output) {
	    string Temp;

	    Temp = "Error writing the identity file " + File;
	    Temp += ":  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

	Output.close();
	if (!Output) {
	    string Temp;

	    Temp = "Error closing the identity file " + File;
	    Temp += " after writing:  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

    }

    OutputVerboseEnd();

}

#if 0
void
UtilityConfig::UpdateIdentityFileOld() {

    std::string File = GetIdentityFileName();

    ofstream Output;

    if (Verbose()) {

	cout << "Create identity file " << File << "...";

    }

    if (!Explain()) {

	SaveFile.CreateBackupFile(File);

	Output.open(File.c_str());
	if (!Output) {
	    string Temp;

	    Temp = "Error opening identity file " + File;
	    Temp += ":  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

	Output << "<!-- License file created by SNFIdentity-->\n"
	       << "<snf>\n"
	       << "    <identity licenseid='" << LicenseId << "' authentication='"
	       << Authentication << "'/>\n"
	       << "</snf>\n";
	if (!Output) {
	    string Temp;

	    Temp = "Error writing identity file " + File;
	    Temp += ":  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

	Output.close();
	if (!Output) {
	    string Temp;

	    Temp = "Error closing identity file " + File;
	    Temp += ":  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);
	}

    }

    OutputVerboseEnd();

    SetOwnerGroup(File);                                                        // Set the user and group.

    SetMode(File, S_IRUSR);                                                     // Set to readonly by owner.

}
#endif

void
UtilityConfig::StartSniffer(std::string ScriptAndArgs, std::string ApplicationName) {

    if (SnifferIsRunning == GetRunningState(ApplicationName)) {

	std::cout << ApplicationName << " is already running.\n";
	return;

    }

    std::string Command;

    Command = SnifferStartScriptDir + ScriptAndArgs;

    if (Verbose()) {

	cout << "Starting Sniffer with the command '" << Command << "'...";
	cout.flush();

    }

    if (!Explain()) {

	if (std::system(Command.c_str()) == -1) {                                      // Start the sniffer.
	    string Temp;

	    Temp = "Error running the command '" + Command;
	    Temp += "' to start the Sniffer:  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);

	}

	OutputVerboseEnd();

	if (SnifferIsRunning != GetRunningState(ApplicationName)) {
	    std::string Temp;

	    Temp = "Unable to start " + ApplicationName;
	    throw std::runtime_error(Temp);

	}

    } else {

        OutputVerboseEnd();

    }

}

void
UtilityConfig::StopSniffer(std::string ScriptAndArgs, std::string ApplicationName) {

    if (SnifferIsStopped == GetRunningState(ApplicationName)) {

	std::cout << ApplicationName << " was not running.\n";
	return;

    }

    std::string Command;

    Command = SnifferStartScriptDir + ScriptAndArgs;

    if (Verbose()) {

	cout << "Stopping Sniffer with the command '" << Command << "'...";
	cout.flush();

    }

    if (!Explain()) {

	if (std::system(Command.c_str()) == -1) {                                      // Start the sniffer.
	    string Temp;

	    Temp = "Error running the command '" + Command;
	    Temp += "' to stop the Sniffer:  ";
	    Temp += strerror(errno);
	    throw std::runtime_error(Temp);

	}

	OutputVerboseEnd();

	if (SnifferIsStopped != GetRunningState(ApplicationName)) {
	    std::string Temp;

	    Temp = "Unable to stop " + ApplicationName;
	    throw std::runtime_error(Temp);

	}

    } else {

        OutputVerboseEnd();

    }

}

bool 
UtilityConfig::ProcessCommandLineItem(std::string OneInput) {

    bool ValidCommand = true;
    std::string TempString;

    if (OneInput == VerboseKey) {

	SetVerbose(true);

    } else if (OneInput == ExplainKey) {

	SetExplain(true);

    } else if (OneInput == HelpKey) {

	SetHelp(true);

    } else if (OneInput == SetupKey) {

	SetSetupRepair(true);

    } else if (OneInput == RepairKey) {

	SetSetupRepair(true);

    } else if (OneInput == StartSnifferKey) {

	SetStartSniffer(true);

    } else if (OneInput == StopSnifferKey) {

	SetStopSniffer(true);

    } else if (0 == OneInput.find(ConfigFileKey)) {
	
        TempString = Trim(OneInput.substr(ConfigFileKey.length()));             // Copy only if not null after trimming.
	SetConfigFileName(TempString);

    } else if (0 == OneInput.find(LicenseIdKey)) {

        TempString = Trim(OneInput.substr(LicenseIdKey.length()));               // Copy only if not null after trimming.
	if (!TempString.empty()) {

	    LicenseId = TempString;
	    LicenseIdIsSpecified = true;

	} else {

	    ValidCommand = false;

	}

    } else if (0 == OneInput.find(AuthenticationKey)) {

        TempString = Trim(OneInput.substr(AuthenticationKey.length()));         // Copy only if not null after trimming.
	if (!TempString.empty()) {

	    Authentication = TempString;
	    AuthenticationIsSpecified = true;

	} else {

	    ValidCommand = false;

	}

    } else {

	ValidCommand = false;

    }

    return ValidCommand;

}

bool
UtilityConfig::CommandLineIsOkay() {

    return (AuthenticationIsSpecified == LicenseIdIsSpecified);

}

std::string
UtilityConfig::HelpCommandLine(std::string ExclusiveCommandsHelp) {

    std::string Help;

    Help  = SetupKey + " | ";
    Help += RepairKey + " | ";
    Help += ExclusiveCommandsHelp + " | ";
    Help += LicenseIdKey + "licenseid " + AuthenticationKey + "authentication | ";
    Help += StartSnifferKey + " | ";
    Help += StopSnifferKey + " ";
    Help += "[" + ConfigFileKey + "snf-config-file] ";
    Help += "[ " + VerboseKey + " " + ExplainKey + " ]";

    return Help;

}

std::string
UtilityConfig::HelpDescription(std::string ExclusiveCommandsHelp) {

    std::string Desc;

    Desc  = "creates and updates the configuration files (snf-config-file and\n";
    Desc += "the ignore list file), the rulebase download script (default: getRulebase),\n";
    Desc += "and the identity file if they don't exist.\n\n";
    Desc += "  -setup                     Perform initial setup/replace missing files\n";
    Desc += "  -repair                    Perform initial setup/replace missing files\n";
    Desc += ExclusiveCommandsHelp;
    Desc += "  -id=licenseid              Specifies the license ID\n";
    Desc += "  -auth=authentication       Specifies the Authentication\n";
    Desc += "  -start                     Start the sniffer\n";
    Desc += "  -stop                      Stop the sniffer\n";
    Desc += "  -v                         Provide verbose output\n";
    Desc += "  -explain                   Provide an explaination of the actions\n";
    Desc += "                             without executing any commands\n";

    return Desc;

}
void
UtilityConfig::SetSetupRepair(bool Specified) {

    SetupRepairRequested = Specified;

}

bool
UtilityConfig::SetupRepairSpecified() {

    return SetupRepairRequested;

}


bool
UtilityConfig::UpdateCredentialsSpecified() {

    return ( (LicenseId.length() > 0) && (Authentication.length() > 0) );

}

void
UtilityConfig::SetStartSniffer(bool Specified) {

    StartSnifferRequested = Specified;

}

bool
UtilityConfig::StartSnifferSpecified() {

    return StartSnifferRequested;

}

void
UtilityConfig::SetStopSniffer(bool Specified) {

    StopSnifferRequested = Specified;

}

bool
UtilityConfig::StopSnifferSpecified() {

    return StopSnifferRequested;

}