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Viewing file:     isInNet.js (1.4 KB)      -rw-r--r--

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const netmask_1 = require("netmask");
const util_1 = require("./util");
/**
 * True iff the IP address of the host matches the specified IP address pattern.
 *
 * Pattern and mask specification is done the same way as for SOCKS configuration.
 *
 * Examples:
 *
 * ``` js
 * isInNet(host, "198.95.249.79", "255.255.255.255")
 *   // is true iff the IP address of host matches exactly 198.95.249.79.
 *
 * isInNet(host, "198.95.0.0", "255.255.0.0")
 *   // is true iff the IP address of the host matches 198.95.*.*.
 * ```
 *
 * @param {String} host a DNS hostname, or IP address. If a hostname is passed,
 *   it will be resoved into an IP address by this function.
 * @param {String} pattern an IP address pattern in the dot-separated format mask.
 * @param {String} mask for the IP address pattern informing which parts of the
 *   IP address should be matched against. 0 means ignore, 255 means match.
 * @return {Boolean}
 */
async function isInNet(host, pattern, mask) {
    const family = 4;
    try {
        const ip = await (0, util_1.dnsLookup)(host, { family });
        if (typeof ip === 'string') {
            const netmask = new netmask_1.Netmask(pattern, mask);
            return netmask.contains(ip);
        }
    }
    catch (err) {
        // ignore
    }
    return false;
}
exports.default = isInNet;
//# sourceMappingURL=isInNet.js.map