Method setServers

lib/internal/dns/utils.js:109–155

(servers)

  }

  setServers(servers) {
    validateArray(servers, 'servers');

    // Cache the original servers because in the event of an error while
    // setting the servers, c-ares won't have any servers available for
    // resolution.
    const newSet = [];
    ArrayPrototypeForEach(servers, (serv, index) => {
      validateString(serv, `servers[${index}]`);
      let ipVersion = isIP(serv);

      if (ipVersion !== 0)
        return ArrayPrototypePush(newSet, [ipVersion, serv, IANA_DNS_PORT]);

      const match = RegExpPrototypeExec(IPv6RE, serv);

      // Check for an IPv6 in brackets.
      if (match) {
        ipVersion = isIP(match[1]);

        if (ipVersion !== 0) {
          const port = NumberParseInt(
            RegExpPrototypeSymbolReplace(addrSplitRE, serv, '$2')) || IANA_DNS_PORT;
          return ArrayPrototypePush(newSet, [ipVersion, match[1], port]);
        }
      }

      // addr::port
      const addrSplitMatch = RegExpPrototypeExec(addrSplitRE, serv);

      if (addrSplitMatch) {
        const hostIP = addrSplitMatch[1];
        const port = addrSplitMatch[2] || IANA_DNS_PORT;

        ipVersion = isIP(hostIP);

        if (ipVersion !== 0) {
          return ArrayPrototypePush(
            newSet, [ipVersion, hostIP, NumberParseInt(port)]);
        }
      }

      throw new ERR_INVALID_IP_ADDRESS(serv);
    });

    this[kSetServersInternal](newSet, servers);
  }

  [kSetServersInternal](newSet, servers) {
    const orig = ArrayPrototypeMap(this._handle.getServers() || [], (val) => {