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94 lines
3.8 KiB
JavaScript
94 lines
3.8 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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export default class MonitorVisibility extends Monitor {
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constructor(name, channel, params, env){
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super(name, channel, params, env);
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this.thresholdMinPeers = (params && params.thresholdMinPeers != null) ? params.thresholdMinPeers : 10;
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if (params.threshold) {
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this.logger.log({
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level: 'error',
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message: "The parameter threshold has been replaced by thresholdMinPeers and it will be soon deprecated."
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});
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this.thresholdMinPeers = params.threshold;
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}
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this.updateMonitoredPrefixes();
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};
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updateMonitoredPrefixes = () => {
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this.monitored = this.input.getMonitoredPrefixes();
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this.monitoredSimpleArray = this.monitored.map(item => item.prefix);
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};
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filter = (message) => {
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// Based on exact match only
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return message.type === 'withdrawal'
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&& this.monitoredSimpleArray.includes(message.prefix);
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};
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squashAlerts = (alerts) => {
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const peers = [...new Set(alerts.map(alert => alert.matchedMessage.peer))].length;
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if (peers >= this.thresholdMinPeers) {
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return (peers === 1) ?
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`The prefix ${alerts[0].matchedMessage.prefix} (${alerts[0].matchedRule.description}) it's no longer visible (withdrawn) from the peer ${alerts[0].matchedMessage.peer}.` :
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`The prefix ${alerts[0].matchedMessage.prefix} (${alerts[0].matchedRule.description}) has been withdrawn. It is no longer visible from ${peers} peers.`;
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} else {
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return false;
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}
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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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const matchedRule = this.getMoreSpecificMatch(messagePrefix);
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if (matchedRule && matchedRule.prefix === messagePrefix) {
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let key = matchedRule.prefix;
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this.publishAlert(key,
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`The prefix ${matchedRule.prefix} has been withdrawn.`,
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matchedRule.asn.getId(),
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matchedRule,
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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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} |