isInNet.js
 1  "use strict";
 2  /**
 3   * Module dependencies.
 4   */
 5  var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
 6      function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
 7      return new (P || (P = Promise))(function (resolve, reject) {
 8          function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
 9          function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
10          function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
11          step((generator = generator.apply(thisArg, _arguments || [])).next());
12      });
13  };
14  Object.defineProperty(exports, "__esModule", { value: true });
15  const netmask_1 = require("netmask");
16  const util_1 = require("./util");
17  /**
18   * True iff the IP address of the host matches the specified IP address pattern.
19   *
20   * Pattern and mask specification is done the same way as for SOCKS configuration.
21   *
22   * Examples:
23   *
24   * ``` js
25   * isInNet(host, "198.95.249.79", "255.255.255.255")
26   *   // is true iff the IP address of host matches exactly 198.95.249.79.
27   *
28   * isInNet(host, "198.95.0.0", "255.255.0.0")
29   *   // is true iff the IP address of the host matches 198.95.*.*.
30   * ```
31   *
32   * @param {String} host a DNS hostname, or IP address. If a hostname is passed,
33   *   it will be resoved into an IP address by this function.
34   * @param {String} pattern an IP address pattern in the dot-separated format mask.
35   * @param {String} mask for the IP address pattern informing which parts of the
36   *   IP address should be matched against. 0 means ignore, 255 means match.
37   * @return {Boolean}
38   */
39  function isInNet(host, pattern, mask) {
40      return __awaiter(this, void 0, void 0, function* () {
41          const family = 4;
42          try {
43              const ip = yield util_1.dnsLookup(host, { family });
44              if (typeof ip === 'string') {
45                  const netmask = new netmask_1.Netmask(pattern, mask);
46                  return netmask.contains(ip);
47              }
48          }
49          catch (err) { }
50          return false;
51      });
52  }
53  exports.default = isInNet;
54  //# sourceMappingURL=isInNet.js.map