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89 lines
3.5 KiB
JavaScript
89 lines
3.5 KiB
JavaScript
/*
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* BSD 3-Clause License
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*
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* Copyright (c) 2019, NTT Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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import Monitor from "./monitor";
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import ipUtils from "../ipUtils";
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import ip from "ip";
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export default class MonitorHijack extends Monitor {
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constructor(name, channel, params, env){
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super(name, channel, params, env);
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};
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updateMonitoredPrefixes = () => {
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this.monitored = this.input.getMonitoredPrefixes();
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};
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filter = (message) => {
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return message.type === 'announcement';
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};
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squashAlerts = (alerts) => {
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return alerts[0].message;
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};
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monitor = (message) =>
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new Promise((resolve, reject) => {
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const messagePrefix = message.prefix;
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let matches = this.monitored.filter(item => {
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const sameOrigin = message.originAs == item.asn;
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return !sameOrigin &&
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(item.prefix == messagePrefix ||
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(!item.ignoreMorespecifics && ip.cidrSubnet(item.prefix).contains(messagePrefix)));
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});
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if (matches.length > 1) {
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matches = [matches.sort((a, b) => ipUtils.sortByPrefixLength(a.prefix, b.prefix)).pop()];
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}
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if (matches.length !== 0) {
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const match = matches[0];
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const text = (message.prefix === match.prefix) ?
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`The prefix ${match.prefix} (${match.description}) is announced by AS${message.originAs} instead of AS${match.asn}` :
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`A new prefix ${message.prefix} is announced by AS${message.originAs}. ` +
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`It should be instead ${match.prefix} (${match.description}) announced by AS${match.asn}`;
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this.publishAlert(message.originAs + "-" + message.prefix,
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text,
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match.asn,
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matches[0],
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message,
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{});
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}
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resolve(true);
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});
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} |