Add logging

src/main.rs

@@ -17,6 +17,12 @@ use dhcproto::{
     },
 };
 use ipnetwork;
+use log::{
+    debug,
+    log_enabled,
+    info,
+    Level,
+};
 use pnet;
 use std::net::SocketAddrV6;
 use tokio::net::UdpSocket;
@@ -35,6 +41,8 @@ struct Cli {
 
 #[tokio::main]
 async fn main() -> Result<()>{
+    env_logger::init();
+
     let cli = Cli::parse();
 
     let all_interfaces = pnet::datalink::interfaces();
@@ -60,6 +68,9 @@ async fn main() -> Result<()>{
     let sock = UdpSocket::bind(socket_addr).await
         .context("Unable to bind UDP socket")?;
 
+    info!("Listening on {}", sock.local_addr()
+        .context("Failed to fetch address socket bound to")?);
+
     let remote_addr = SocketAddrV6::new(ALL_DHCP_RELAY_AGENTS_AND_SERVERS.parse().unwrap(), DHCP_RELAY_AGENT_AND_SERVER_PORT, 0, selected_interface.index.clone());
 
     let mut msg = Message::new(MessageType::InformationRequest);
@@ -89,8 +100,10 @@ async fn main() -> Result<()>{
             .context("Unable to parse DHCPv6 response message")?;
 
         if recv_msg.xid() == msg.xid() {
-            println!("{:?} bytes received from {:?}", len, recv_addr);
-            println!("{}", &recv_buf[..len].escape_ascii().to_string());
+            info!("{:?} bytes received from {:?}", len, recv_addr);
+            if log_enabled!(Level::Debug) {
+                debug!("Received packet: {}", hex::encode(&recv_buf[..len]));
+            }
             println!("{}", &recv_msg);
             break;
         }