Display response in a human readable way

src/main.rs

@@ -92,20 +92,43 @@ async fn main() -> Result<()>{
     sock.send_to(&msg_buf, remote_addr).await
         .context("Failed to send DHCPv6 INFORMATION-REQUEST message")?;
 
-    loop {
+    let response_msg = loop {
         let mut recv_buf = [0; 1024];
-        let (len, recv_addr) = sock.recv_from(&mut recv_buf).await
+        let (recv_len, recv_addr) = sock.recv_from(&mut recv_buf).await
             .context("Failed to receive DHCPv6 response")?;
+
+        if log_enabled!(Level::Debug) {
+            debug!("{:?} bytes received from {:?}", recv_len, recv_addr);
+            debug!("Received packet: {}", hex::encode(&recv_buf[..recv_len]));
+        }
+
         let recv_msg = Message::decode(&mut Decoder::new(&recv_buf))
             .context("Unable to parse DHCPv6 response message")?;
 
-        if recv_msg.xid() == msg.xid() {
-            info!("{:?} bytes received from {:?}", len, recv_addr);
         if log_enabled!(Level::Debug) {
-                debug!("Received packet: {}", hex::encode(&recv_buf[..len]));
+            debug!("Packet contains transaction id: 0x{}", hex::encode(&msg.xid()));
         }
-            println!("{}", &recv_msg);
-            break;
+
+        if recv_msg.xid() == msg.xid() {
+            info!("Found reponse with matching transaction id");
+            break recv_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);
         }
     }