domotz-remote-pawn/src/discovery/tcp_services/parser.js

Domotz Agent

/** This file is part of Domotz Agent.
 * Copyright (C) 2016  Domotz Ltd
 *
 * Domotz Agent 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 3 of the License, or
 * (at your option) any later version.
 *
 * Domotz Agent 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 Domotz Agent.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Created by tom on 14/09/15.
 */

module.exports = function (result, scannedIp, myConsole) {
    try {
        var output = {};

        if (result.nmaprun.runstats[0].hosts[0].$.up === 0) {
            throw new Error('Host is reported DOWN by NMAP');
        }

        // https://domotzjira.atlassian.net/browse/BT-1952
        // Under certain circumstances, nmap returns an XML containing extra hosts, other than the scanned one
        // We must hence select the right host from the list
        var host = null;
        if (result.nmaprun.host) {
            result.nmaprun.host.forEach(function (candidateHost) {
                try {
                    if (candidateHost.address[0].$.addr === scannedIp && candidateHost.ports !== undefined && host === null) {
                        host = candidateHost;
                        return;
                    }
                } catch (e) {
                    //
                }
                myConsole.error('(%s) nmap returned unexpected host: %s', scannedIp, JSON.stringify(candidateHost));
            });
        }

        if (host === null) {
            myConsole.warn('PortMap: Cannot parse XML.');
            myConsole.warn('XML: ' + result);
            return {};
        }

        var ports = host.ports[0].port;
        if (ports === undefined || ports.length === 0) {
            myConsole.info('No ports found');
            return {};
        }
        for (var i = 0; i < ports.length; i++) {
            var currentPort = ports[i];
            var status = 'OFFLINE';
            if (currentPort.state[0].$.state === 'open') {
                status = 'ONLINE';
            }
            output[currentPort.$.portid] = status;
        }
        return output;
    } catch (err) {
        myConsole.warn(err.stack);
        throw new Error('Error during parsing: Wrong Input');
    }
};