feat: tested nl-sys, and it links

sparse-beacon/Cargo.toml

@@ -2,3 +2,6 @@
 name = "sparse-beacon"
 version = "0.7.0"
 edition = "2021"
+
+[dependencies]
+nl-sys = { path = "../nl-sys" }

sparse-beacon/src/main.rs

@@ -1,3 +1,16 @@
+use nl_sys::{netlink, route};
+
 fn main() {
-    println!("hi there");
+    let ip = std::net::Ipv4Addr::new(192, 168, 3, 10);
+
+    let (ifname, _, srcip, src_mac, dst_mac, _) = {
+        let socket = netlink::Socket::new().unwrap();
+
+        let routes = socket.get_routes().unwrap();
+        let neighs = socket.get_neigh().unwrap();
+        let links = socket.get_links().unwrap();
+        let addrs = socket.get_addrs().unwrap();
+
+        route::get_macs_and_src_for_ip(&addrs, &routes, &neighs, &links, ip).unwrap()
+    };
 }