Display response in a human readable way

src/main.rs

@@ -115,7 +115,22 @@ async fn main() -> Result<()>{
         }
     };
 
-    println!("{}", &response_msg);
+    if let Some(DhcpOption::ServerId(server_id)) = &response_msg.opts().get(OptionCode::ServerId) {
+        println!("server_id: {}", hex::encode(&server_id));
+    }
+
+    if let Some(DhcpOption::DomainNameServers(domain_name_servers)) = &response_msg.opts().get(OptionCode::DomainNameServers) {
+        println!("domain_name_servers:");
+        for domain_name_server in domain_name_servers {
+            println!("  - {}", domain_name_server);
+        }
+    }
+    if let Some(DhcpOption::DomainSearchList(domain_search_list)) = &response_msg.opts().get(OptionCode::DomainSearchList) {
+        println!("domain_search_list:");
+        for search_domain_name in domain_search_list {
+            println!("  - {}", search_domain_name);
+        }
+    }
 
     Ok(())
 }