text: "use strict";
  
  const net = require("net");
  const execa = require("execa");
  const dests = ["default", "0.0.0.0", "0.0.0.0/0", "::", "::/0"];
  
  const args = {
    v4: ["-rn", "-f", "inet"],
    v6: ["-rn", "-f", "inet6"],
  };
  
  const parse = (stdout, family) => {
    let result;
  
    (stdout || "").trim().split("\n").some(line => {
      const results = line.split(/ +/) || [];
      const target = results[0];
      const gateway = results[1];
      const iface = results[family === "v4" ? 5 : 3];
      if (dests.indexOf(target) !== -1 && gateway && net.isIP(gateway)) {
        result = {gateway: gateway, interface: (iface ? iface : null)};
        return true;
      }
    });
  
    if (!result) {
      throw new Error("Unable to determine default gateway");
    }
  
    return result;
  };
  
  const promise = family => {
    return execa.stdout("netstat", args[family]).then(stdout => {
      return parse(stdout, family);
    });
  };
  
  const sync = family => {
    const result = execa.sync("netstat", args[family]);
    return parse(result.stdout, family);
  };
  
  module.exports.v4 = () => promise("v4");
  module.exports.v6 = () => promise("v6");
  
  module.exports.v4.sync = () => sync("v4");
  module.exports.v6.sync = () => sync("v6");
  