feat: add tracing debug logs

Cargo.toml

@@ -21,10 +21,12 @@ sha1_smol = "1.0.0"
 flume = { version = "0.11.0", features = ["select", "eventual-fairness"], default-features = false }
 ed25519-dalek = "2.1.0"
 bytes = "1.5.0"
+tracing = "0.1"
 
 [dev-dependencies]
 clap = { version = "4.4.8", features = ["derive"] }
 futures = "0.3.29"
+tracing-subscriber = "0.3"
 
 [features]
 async = ["flume/async"]

examples/announce_peer.rs

@@ -4,6 +4,9 @@ use mainline::{Dht, Id};
 
 use clap::Parser;
 
+use tracing::Level;
+use tracing_subscriber;
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Cli {
@@ -12,6 +15,10 @@ struct Cli {
 }
 
 fn main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
     let cli = Cli::parse();
 
     match Id::from_str(cli.infohash.as_str()) {

examples/async/get_immutable.rs

@@ -4,6 +4,9 @@ use mainline::{Dht, Id};
 
 use clap::Parser;
 
+use tracing::Level;
+use tracing_subscriber;
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Cli {
@@ -12,6 +15,10 @@ struct Cli {
 }
 
 async fn async_main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
     let cli = Cli::parse();
 
     let target_parse_result: Result<Id, _> = Id::from_str(cli.target.as_str());

examples/bootstrap.rs

@@ -0,0 +1,16 @@
+use std::{thread, time::Duration};
+
+use mainline::Dht;
+
+use tracing::Level;
+use tracing_subscriber;
+
+fn main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
+    Dht::default();
+
+    thread::sleep(Duration::from_secs(5));
+}

examples/get_immutable.rs

@@ -4,6 +4,9 @@ use mainline::{Dht, Id};
 
 use clap::Parser;
 
+use tracing::Level;
+use tracing_subscriber;
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Cli {
@@ -12,6 +15,10 @@ struct Cli {
 }
 
 fn main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
     let cli = Cli::parse();
 
     let target_parse_result: Result<Id, _> = Id::from_str(cli.target.as_str());

examples/get_mutable.rs

@@ -1,5 +1,7 @@
 use ed25519_dalek::VerifyingKey;
 use std::convert::TryFrom;
+use tracing::Level;
+use tracing_subscriber;
 
 use std::time::Instant;
 
@@ -15,6 +17,10 @@ struct Cli {
 }
 
 fn main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
     let cli = Cli::parse();
 
     let public_key = from_hex(cli.public_key.clone());

examples/get_peers.rs

@@ -4,6 +4,9 @@ use mainline::{Dht, Id};
 
 use clap::Parser;
 
+use tracing::Level;
+use tracing_subscriber;
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Cli {
@@ -12,6 +15,10 @@ struct Cli {
 }
 
 fn main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
     let cli = Cli::parse();
 
     let infohash_parse_result: Result<Id, _> = Id::from_str(cli.infohash.as_str());

examples/put_immutable.rs

@@ -4,6 +4,9 @@ use mainline::Dht;
 
 use clap::Parser;
 
+use tracing::Level;
+use tracing_subscriber;
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Cli {
@@ -12,6 +15,10 @@ struct Cli {
 }
 
 fn main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
     let cli = Cli::parse();
 
     let dht = Dht::default();

examples/put_mutable.rs

@@ -8,6 +8,9 @@ use mainline::{common::MutableItem, Dht};
 
 use clap::Parser;
 
+use tracing::Level;
+use tracing_subscriber;
+
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Cli {
@@ -18,6 +21,10 @@ struct Cli {
 }
 
 fn main() {
+    tracing_subscriber::fmt()
+        .with_max_level(Level::DEBUG)
+        .init();
+
     let cli = Cli::parse();
 
     let dht = Dht::default();
@@ -42,7 +49,7 @@ fn main() {
     let metadata = dht.put_mutable(item).expect("put mutable failed");
 
     println!(
-        "Stored immutable data as {:?} in {:?} seconds",
+        "Stored mutable data as {:?} in {:?} seconds",
         metadata.target(),
         start.elapsed().as_secs_f32()
     );

src/routing_table.rs

@@ -106,6 +106,12 @@ impl RoutingTable {
         self.buckets.values().all(|bucket| bucket.is_empty())
     }
 
+    pub fn size(&self) -> usize {
+        self.buckets
+            .values()
+            .fold(0, |acc, bucket| acc + bucket.nodes.len())
+    }
+
     pub fn contains(&self, node_id: &Id) -> bool {
         let distance = self.id.distance(node_id);
 

src/rpc.rs

@@ -3,6 +3,7 @@ use std::net::{SocketAddr, ToSocketAddrs};
 use std::time::{Duration, Instant};
 
 use bytes::Bytes;
+use tracing::{debug, error};
 
 use crate::common::{
     validate_immutable, GetImmutableResponse, GetMutableResponse, GetPeerResponse, Id, MutableItem,
@@ -72,7 +73,7 @@ impl Rpc {
             tokens: Tokens::new(),
             peers: PeersStore::new(),
 
-            last_table_refresh: Instant::now(),
+            last_table_refresh: Instant::now() - REFRESH_TABLE_INTERVAL,
             last_table_ping: Instant::now(),
         })
     }
@@ -134,7 +135,22 @@ impl Rpc {
         // disconnect response receivers too soon.
         //
         // Has to happen _before_ await to recv_from the socket.
-        self.queries.retain(|_, query| !query.is_done());
+        let self_id = self.id;
+        let table_size = self.routing_table.size();
+
+        self.queries.retain(|id, query| {
+            let done = query.is_done();
+
+            if done && id == &self_id {
+                if table_size == 0 {
+                    error!("Could not bootstrap the routing table");
+                } else {
+                    debug!(table_size, "Populated the routing table");
+                }
+            }
+
+            !done
+        });
         self.store_queries.retain(|_, query| !query.is_done());
 
         self.maintain_routing_table();
@@ -150,8 +166,8 @@ impl Rpc {
                 MessageType::Response(_) => {
                     self.handle_response(from, &message);
                 }
-                MessageType::Error(_err) => {
-                    // TODO: Handle error messages!
+                MessageType::Error(error) => {
+                    debug!(?message, "RPC Error response");
                 }
             }
         };
@@ -464,7 +480,8 @@ impl Rpc {
                     },
                 )) => {
                     if !validate_immutable(v, query.target()) {
-                        // TODO: log error
+                        let target = query.target();
+                        debug!(?v, ?target, "Invalid immutable value");
                         return;
                     }
 
@@ -489,6 +506,7 @@ impl Rpc {
                         }) => salt,
                         _ => &None,
                     };
+                    let target = query.target();
 
                     if let Ok(item) = MutableItem::from_dht_message(
                         query.target(),
@@ -503,7 +521,7 @@ impl Rpc {
                             item,
                         }));
                     } else {
-                        // TODO: log error
+                        debug!(?v, ?seq, ?sig, ?salt, ?target, "Invalid mutable record");
                     }
                 }
                 // Ping response is already handled in add_node()
@@ -525,7 +543,7 @@ impl Rpc {
 
     fn maintain_routing_table(&mut self) {
         if self.routing_table.is_empty()
-            || self.last_table_refresh.elapsed() > REFRESH_TABLE_INTERVAL
+            && self.last_table_refresh.elapsed() > REFRESH_TABLE_INTERVAL
         {
             self.last_table_refresh = Instant::now();
             self.populate();

src/socket.rs

@@ -3,6 +3,7 @@
 use std::collections::HashMap;
 use std::net::{SocketAddr, UdpSocket};
 use std::time::{Duration, Instant};
+use tracing::{debug, trace};
 
 use crate::messages::{ErrorSpecific, Message, MessageType, RequestSpecific, ResponseSpecific};
 
@@ -129,7 +130,9 @@ impl KrpcSocket {
             .retain(|_, request| request.sent_at.elapsed() < request_timeout);
 
         if let Ok((amt, from)) = self.socket.recv_from(&mut buf) {
-            match Message::from_bytes(&buf[..amt]) {
+            let bytes = &buf[..amt];
+
+            match Message::from_bytes(bytes) {
                 Ok(message) => {
                     // Parsed correctly.
                     match message.message_type {
@@ -150,16 +153,16 @@ impl KrpcSocket {
                                     self.inflight_requests.remove(&message.transaction_id);
                                     return Some((message, from));
                                 } else {
-                                    // TODO: handle/log response from wrong address.
+                                    debug!("Response from the wrong address");
                                 }
                             } else {
-                                // TODO: handle/log unexpected transaction id.
+                                debug!("Unexpected response id");
                             };
                         }
                     }
                 }
-                Err(_err) => {
-                    // TODO: handle/log parsing errors.
+                Err(error) => {
+                    debug!(?error, ?bytes, "Received invalid message");
                 }
             };
         };
@@ -211,6 +214,7 @@ impl KrpcSocket {
 
     /// Send a raw dht message
     fn send(&mut self, address: SocketAddr, message: Message) -> Result<()> {
+        trace!(?message, "Sending a message");
         self.socket.send_to(&message.to_bytes()?, address)?;
         Ok(())
     }