Update README.md

README.md

@@ -15,7 +15,7 @@ Get default network information
 Add `default-net` to your dependencies  
 ```toml:Cargo.toml
 [dependencies]
-default-net = "0.4.0"
+default-net = "0.5.0"
 ```
 
 ## Example 
@@ -23,16 +23,29 @@ default-net = "0.4.0"
 use default_net;
 
 fn main(){
-    if let Some(default_interface) = default_net::get_default_interface(){
-        println!("Index {}", default_interface.index);
-        println!("Name {}", default_interface.name);
-        println!("MAC {:?}", default_interface.mac);
-        println!("IPv4 {:?}", default_interface.ipv4);
-        println!("IPv6 {:?}", default_interface.ipv6);
-        println!("Gateway IP {:?}", default_interface.gateway.ip);
-        println!("Gateway MAC {:?}", default_interface.gateway.mac);
+    match default_net::get_default_interface() {
+        Ok(default_interface) => {
+            println!("Default Interface");
+            println!("\tIndex: {}", default_interface.index);
+            println!("\tName: {}", default_interface.name);
+            if let Some(mac_addr) = default_interface.mac_addr {
+                println!("\tMAC: {}", mac_addr);
             }else{
-        println!("Failed to get default interface info");
+                println!("\tMAC: (Failed to get mac address)");
+            }
+            println!("\tIPv4: {:?}", default_interface.ipv4);
+            println!("\tIPv6: {:?}", default_interface.ipv6);
+            if let Some(gateway) = default_interface.gateway {
+                println!("Default Gateway");
+                println!("\tMAC: {}", gateway.mac_addr);
+                println!("\tIP: {}", gateway.ip_addr);
+            }else {
+                println!("Default Gateway: (Not found)");
+            }
+        },
+        Err(e) => {
+            println!("{}", e);
+        },
     }
 }
 ```