feat: add ping function

wol.js

@@ -1,4 +1,5 @@
 import dgram from "node:dgram"
+import { exec } from "node:child_process";
 
 export function createWolPacket(mac) {
     const parts = mac.split(/[:-]/);
@@ -38,4 +39,12 @@ export async function sendWolPacket(mac, broadcast = "255.255.255.255", port = 9
             });
         });
     });
+}
+
+export function ping(ip) {
+    return new Promise(resolve => {
+        exec(`ping -c 1 -W 1 ${ip}`, err => {
+            resolve(!err);
+        });
+    });
 }