1 |
3a515b92
|
cagy
|
"use strict";
|
2 |
|
|
|
3 |
|
|
const net = require("net");
|
4 |
|
|
const execa = require("execa");
|
5 |
|
|
const dests = ["default", "0.0.0.0", "0.0.0.0/0", "::", "::/0"];
|
6 |
|
|
|
7 |
|
|
const args = {
|
8 |
|
|
v4: ["-rn", "-f", "inet"],
|
9 |
|
|
v6: ["-rn", "-f", "inet6"],
|
10 |
|
|
};
|
11 |
|
|
|
12 |
|
|
const parse = stdout => {
|
13 |
|
|
let result;
|
14 |
|
|
|
15 |
|
|
(stdout || "").trim().split("\n").some(line => {
|
16 |
|
|
const results = line.split(/ +/) || [];
|
17 |
|
|
const target = results[0];
|
18 |
|
|
const gateway = results[1];
|
19 |
|
|
const iface = results[5];
|
20 |
|
|
if (dests.indexOf(target) !== -1 && gateway && net.isIP(gateway)) {
|
21 |
|
|
result = {gateway, interface: (iface ? iface : null)};
|
22 |
|
|
return true;
|
23 |
|
|
}
|
24 |
|
|
});
|
25 |
|
|
|
26 |
|
|
if (!result) {
|
27 |
|
|
throw new Error("Unable to determine default gateway");
|
28 |
|
|
}
|
29 |
|
|
|
30 |
|
|
return result;
|
31 |
|
|
};
|
32 |
|
|
|
33 |
|
|
const promise = family => {
|
34 |
|
|
return execa.stdout("netstat", args[family]).then(stdout => {
|
35 |
|
|
return parse(stdout);
|
36 |
|
|
});
|
37 |
|
|
};
|
38 |
|
|
|
39 |
|
|
const sync = family => {
|
40 |
|
|
const result = execa.sync("netstat", args[family]);
|
41 |
|
|
return parse(result.stdout);
|
42 |
|
|
};
|
43 |
|
|
|
44 |
|
|
module.exports.v4 = () => promise("v4");
|
45 |
|
|
module.exports.v6 = () => promise("v6");
|
46 |
|
|
|
47 |
|
|
module.exports.v4.sync = () => sync("v4");
|
48 |
|
|
module.exports.v6.sync = () => sync("v6");
|