network-performance-monitor/dist/src/dnsTest.js

A comprehensive network performance monitoring tool that continuously tests and tracks your network's performance over time

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.DnsTest = void 0;
const dns = __importStar(require("dns/promises"));
const config_1 = require("./config");
const logger_1 = require("./logger");
class DnsTest {
    db;
    constructor(db) {
        this.db = db;
    }
    async testServer(server, query, networkName) {
        const resolver = new dns.Resolver();
        resolver.setServers([server]);
        const startTime = Date.now();
        const result = {
            server,
            query,
            latency: null,
            error: null,
            success: false
        };
        try {
            await resolver.resolve4(query);
            result.latency = Date.now() - startTime;
            result.success = true;
        }
        catch (error) {
            result.error = error instanceof Error ? error.message : 'Unknown error';
        }
        // Log the result
        (0, logger_1.logTestResult)('DNS', server, result.success, result.latency || undefined, result.error || undefined);
        // Store in database
        await this.db.insertDnsQuery(server, query, result.latency, result.error, networkName);
        // Update baseline if successful
        if (result.success && result.latency !== null) {
            await this.db.updateBaseline('dns', server, result.latency);
        }
        return result;
    }
    async testAllServers(networkName) {
        const results = [];
        for (const server of config_1.config.dns.servers) {
            const result = await this.testServer(server, config_1.config.dns.query, networkName);
            results.push(result);
        }
        return results;
    }
    async checkForAnomalies(results) {
        let anomalyDetected = false;
        for (const result of results) {
            if (!result.success || result.latency === null)
                continue;
            const baseline = await this.db.getBaseline('dns', result.server);
            if (baseline !== null && result.latency > baseline * config_1.config.thresholds.latencyMultiplier) {
                anomalyDetected = true;
                (0, logger_1.logTestResult)('DNS_ANOMALY', result.server, false, result.latency, `Latency ${result.latency}ms exceeds threshold (baseline: ${baseline}ms)`);
            }
        }
        return anomalyDetected;
    }
}
exports.DnsTest = DnsTest;
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