From e15d3e6fd20b3f87abaad7ddec1c88b0e66419f9 Mon Sep 17 00:00:00 2001 From: hozan23 Date: Mon, 15 Jul 2024 13:16:01 +0200 Subject: p2p: Major refactoring of the handshake protocol Introduce a new protocol InitProtocol which can be used as the core protocol for initializing a connection with a peer. Move the handshake logic from the PeerPool module to the protocols directory and build a handshake protocol that implements InitProtocol trait. --- p2p/src/discovery/lookup.rs | 114 ++++++++++++++++++++------------------------ 1 file changed, 53 insertions(+), 61 deletions(-) (limited to 'p2p/src/discovery/lookup.rs') diff --git a/p2p/src/discovery/lookup.rs b/p2p/src/discovery/lookup.rs index 9ddf614..47a1d09 100644 --- a/p2p/src/discovery/lookup.rs +++ b/p2p/src/discovery/lookup.rs @@ -2,24 +2,17 @@ use std::{sync::Arc, time::Duration}; use futures_util::stream::{FuturesUnordered, StreamExt}; use log::{error, trace}; +use parking_lot::RwLock; use rand::{rngs::OsRng, seq::SliceRandom, RngCore}; -use karyon_core::{ - async_runtime::{lock::RwLock, Executor}, - async_util::timeout, - crypto::KeyPair, - util::decode, -}; +use karyon_core::{async_runtime::Executor, async_util::timeout, crypto::KeyPair, util::decode}; use karyon_net::{Conn, Endpoint}; use crate::{ connector::Connector, listener::Listener, - message::{ - get_msg_payload, FindPeerMsg, NetMsg, NetMsgCmd, PeerMsg, PeersMsg, PingMsg, PongMsg, - ShutdownMsg, - }, + message::{FindPeerMsg, NetMsg, NetMsgCmd, PeerMsg, PeersMsg, PingMsg, PongMsg, ShutdownMsg}, monitor::{ConnEvent, DiscvEvent, Monitor}, routing_table::RoutingTable, slots::ConnectionSlots, @@ -46,7 +39,7 @@ pub struct LookupService { outbound_slots: Arc, /// Resolved listen endpoint - listen_endpoint: Option>, + listen_endpoint: RwLock>, /// Holds the configuration for the P2P network. config: Arc, @@ -85,18 +78,13 @@ impl LookupService { ex, ); - let listen_endpoint = config - .listen_endpoint - .as_ref() - .map(|endpoint| RwLock::new(endpoint.clone())); - Self { id: id.clone(), table, listener, connector, outbound_slots, - listen_endpoint, + listen_endpoint: RwLock::new(None), config, monitor, } @@ -109,10 +97,18 @@ impl LookupService { } /// Set the resolved listen endpoint. - pub async fn set_listen_endpoint(&self, resolved_endpoint: &Endpoint) { - if let Some(endpoint) = &self.listen_endpoint { - *endpoint.write().await = resolved_endpoint.clone(); - } + pub fn set_listen_endpoint(&self, resolved_endpoint: &Endpoint) -> Result<()> { + let resolved_endpoint = Endpoint::Tcp( + resolved_endpoint.addr()?.clone(), + self.config.discovery_port, + ); + *self.listen_endpoint.write() = Some(resolved_endpoint); + Ok(()) + } + + /// Get the listening endpoint. + pub fn listen_endpoint(&self) -> Option { + self.listen_endpoint.read().clone() } /// Shuts down the lookup service. @@ -253,36 +249,51 @@ impl LookupService { target_peer_id: &PeerID, ) -> Result> { trace!("Send Ping msg"); - self.send_ping_msg(&conn).await?; + let peers; - trace!("Send FindPeer msg"); - let peers = self.send_findpeer_msg(&conn, target_peer_id).await?; + let ping_msg = self.send_ping_msg(&conn).await?; - if peers.0.len() >= MAX_PEERS_IN_PEERSMSG { - return Err(Error::Lookup("Received too many peers in PeersMsg")); + loop { + let t = Duration::from_secs(self.config.lookup_response_timeout); + let msg: NetMsg = timeout(t, conn.recv()).await??; + match msg.header.command { + NetMsgCmd::Pong => { + let (pong_msg, _) = decode::(&msg.payload)?; + if ping_msg.nonce != pong_msg.0 { + return Err(Error::InvalidPongMsg); + } + trace!("Send FindPeer msg"); + self.send_findpeer_msg(&conn, target_peer_id).await?; + } + NetMsgCmd::Peers => { + peers = decode::(&msg.payload)?.0.peers; + if peers.len() >= MAX_PEERS_IN_PEERSMSG { + return Err(Error::Lookup("Received too many peers in PeersMsg")); + } + break; + } + c => return Err(Error::InvalidMsg(format!("Unexpected msg: {:?}", c))), + }; } trace!("Send Peer msg"); - if let Some(endpoint) = &self.listen_endpoint { - self.send_peer_msg(&conn, endpoint.read().await.clone()) - .await?; + if let Some(endpoint) = self.listen_endpoint() { + self.send_peer_msg(&conn, endpoint.clone()).await?; } trace!("Send Shutdown msg"); self.send_shutdown_msg(&conn).await?; - Ok(peers.0) + Ok(peers) } /// Start a listener. async fn start_listener(self: &Arc) -> Result<()> { - let addr = match &self.listen_endpoint { - Some(a) => a.read().await.addr()?.clone(), + let endpoint: Endpoint = match self.listen_endpoint() { + Some(e) => e.clone(), None => return Ok(()), }; - let endpoint = Endpoint::Tcp(addr, self.config.discovery_port); - let callback = { let this = self.clone(); |conn: Conn| async move { @@ -292,7 +303,7 @@ impl LookupService { } }; - self.listener.start(endpoint.clone(), callback).await?; + self.listener.start(endpoint, callback).await?; Ok(()) } @@ -329,10 +340,9 @@ impl LookupService { } } - /// Sends a Ping msg and wait to receive the Pong message. - async fn send_ping_msg(&self, conn: &Conn) -> Result<()> { + /// Sends a Ping msg. + async fn send_ping_msg(&self, conn: &Conn) -> Result { trace!("Send Pong msg"); - let mut nonce: [u8; 32] = [0; 32]; RngCore::fill_bytes(&mut OsRng, &mut nonce); @@ -341,18 +351,7 @@ impl LookupService { nonce, }; conn.send(NetMsg::new(NetMsgCmd::Ping, &ping_msg)?).await?; - - let t = Duration::from_secs(self.config.lookup_response_timeout); - let recv_msg: NetMsg = timeout(t, conn.recv()).await??; - - let payload = get_msg_payload!(Pong, recv_msg); - let (pong_msg, _) = decode::(&payload)?; - - if ping_msg.nonce != pong_msg.0 { - return Err(Error::InvalidPongMsg); - } - - Ok(()) + Ok(ping_msg) } /// Sends a Pong msg @@ -363,22 +362,15 @@ impl LookupService { Ok(()) } - /// Sends a FindPeer msg and wait to receivet the Peers msg. - async fn send_findpeer_msg(&self, conn: &Conn, peer_id: &PeerID) -> Result { + /// Sends a FindPeer msg + async fn send_findpeer_msg(&self, conn: &Conn, peer_id: &PeerID) -> Result<()> { trace!("Send FindPeer msg"); conn.send(NetMsg::new( NetMsgCmd::FindPeer, FindPeerMsg(peer_id.clone()), )?) .await?; - - let t = Duration::from_secs(self.config.lookup_response_timeout); - let recv_msg: NetMsg = timeout(t, conn.recv()).await??; - - let payload = get_msg_payload!(Peers, recv_msg); - let (peers, _) = decode(&payload)?; - - Ok(peers) + Ok(()) } /// Sends a Peers msg. @@ -389,7 +381,7 @@ impl LookupService { .closest_entries(&peer_id.0, MAX_PEERS_IN_PEERSMSG); let peers: Vec = entries.into_iter().map(|e| e.into()).collect(); - conn.send(NetMsg::new(NetMsgCmd::Peers, PeersMsg(peers))?) + conn.send(NetMsg::new(NetMsgCmd::Peers, PeersMsg { peers })?) .await?; Ok(()) } -- cgit v1.2.3