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use super::{
error::NetworkErrors,
routing::{RoutingBehaviour, RoutingComposedEvent},
tell::{TellBehaviour, TellBehaviourEvent},
};
use crate::{
commons::crypto::{KeyMaterial, KeyPair},
ListenAddr,
};
use crate::{
message::{Command, NetworkEvent},
Notification,
};
use futures::StreamExt;
use instant::Duration;
use libp2p::{
core::{
either::EitherError,
muxing::StreamMuxerBox,
transport::{Boxed, MemoryTransport},
upgrade,
},
dns,
identity::{ed25519, Keypair},
kad::{
AddProviderOk, GetClosestPeersError, GetClosestPeersOk, KademliaEvent, PeerRecord,
PutRecordOk, QueryResult,
},
mplex,
multiaddr::Protocol,
noise,
swarm::{AddressScore, ConnectionHandlerUpgrErr, NetworkBehaviour, SwarmBuilder, SwarmEvent},
tcp::TokioTcpConfig,
yamux, Multiaddr, NetworkBehaviour, PeerId, Swarm, Transport,
};
use log::{debug, error, info};
use std::collections::{HashMap, HashSet, VecDeque};
use std::error::Error;
use tokio::sync::mpsc;
use tokio_util::sync::CancellationToken;
#[cfg(test)]
use libp2p::kad::{record::Key, QueryId, Quorum, Record};
const LOG_TARGET: &str = "TAPLE_NETWORT::Network";
const RETRY_TIMEOUT: u64 = 30000;
type TapleSwarmEvent = SwarmEvent<
NetworkComposedEvent,
EitherError<
EitherError<std::io::Error, std::io::Error>,
ConnectionHandlerUpgrErr<std::io::Error>,
>,
>;
#[allow(dead_code)]
pub enum SendMode {
RequestResponse,
Tell,
}
#[derive(NetworkBehaviour)]
#[behaviour(out_event = "NetworkComposedEvent")]
pub struct TapleNetworkBehavior {
routing: RoutingBehaviour,
tell: TellBehaviour,
}
#[derive(Debug)]
pub enum NetworkComposedEvent {
TellBehaviourEvent(TellBehaviourEvent),
RoutingEvent(RoutingComposedEvent),
}
/// Adapt `IdentifyEvent` to `NetworkComposedEvent`
impl From<TellBehaviourEvent> for NetworkComposedEvent {
fn from(event: TellBehaviourEvent) -> NetworkComposedEvent {
NetworkComposedEvent::TellBehaviourEvent(event)
}
}
/// Adapt `RoutingEvent` to `NetworkComposedEvent`
impl From<RoutingComposedEvent> for NetworkComposedEvent {
fn from(event: RoutingComposedEvent) -> NetworkComposedEvent {
NetworkComposedEvent::RoutingEvent(event)
}
}
impl TapleNetworkBehavior {
pub fn new(local_key: Keypair, bootstrap_nodes: Vec<(PeerId, Multiaddr)>) -> Self {
let routing = RoutingBehaviour::new(local_key, bootstrap_nodes);
let tell = TellBehaviour::new(100000, Duration::from_secs(10), Duration::from_secs(10));
TapleNetworkBehavior { routing, tell }
}
#[cfg(test)]
pub fn send_message(&mut self, peer: &PeerId, data: &[u8]) {
self.tell.send_message(peer, data);
}
#[cfg(test)]
pub fn bootstrap(&mut self) {
self.routing.bootstrap();
}
#[cfg(test)]
pub fn handle_rout_ev(&mut self, ev: RoutingComposedEvent) {
self.routing.handle_event(ev);
}
#[allow(dead_code)]
#[cfg(test)]
pub fn put_record(
&mut self,
record: Record,
quorum: Quorum,
) -> Result<QueryId, libp2p::kad::record::store::Error> {
self.routing.put_record(record, quorum)
}
#[allow(dead_code)]
#[cfg(test)]
pub fn get_record(&mut self, key: Key, quorum: Quorum) -> QueryId {
self.routing.get_record(key, quorum)
}
}
fn check_listen_addr_integrity(addrs: &Vec<ListenAddr>) -> Result<ListenProtocols, NetworkErrors> {
let mut has_memory = false;
let mut has_ip = false;
for addr in addrs {
match addr {
ListenAddr::Memory { .. } => has_memory = true,
ListenAddr::IP4 { .. } => has_ip = true,
ListenAddr::IP6 { .. } => has_ip = true,
}
}
if has_memory && has_ip {
return Err(NetworkErrors::ProtocolConflict);
}
if has_ip {
return Ok(ListenProtocols::IP);
} else {
return Ok(ListenProtocols::Memory);
}
}
/// Network Structure for connect message-sender, message-receiver and LibP2P network stack
pub struct NetworkProcessor {
addr: Vec<ListenAddr>,
swarm: Swarm<TapleNetworkBehavior>,
command_sender: mpsc::Sender<Command>,
command_receiver: mpsc::Receiver<Command>,
event_sender: mpsc::Sender<NetworkEvent>,
pendings: HashMap<PeerId, VecDeque<Vec<u8>>>,
active_get_querys: HashSet<PeerId>,
token: CancellationToken,
notification_tx: tokio::sync::mpsc::Sender<Notification>,
bootstrap_nodes: Vec<(PeerId, Multiaddr)>,
pending_bootstrap_nodes: HashMap<PeerId, Multiaddr>,
bootstrap_retries_steam:
futures::stream::futures_unordered::FuturesUnordered<tokio::time::Sleep>,
node_public_key: Vec<u8>,
external_addresses: Vec<Multiaddr>,
}
enum ListenProtocols {
Memory,
IP,
}
impl NetworkProcessor {
pub fn new(
addr: Vec<ListenAddr>,
bootstrap_nodes: Vec<(PeerId, Multiaddr)>,
event_sender: mpsc::Sender<NetworkEvent>,
controller_mc: KeyPair,
token: CancellationToken,
notification_tx: tokio::sync::mpsc::Sender<Notification>,
external_addresses: Vec<Multiaddr>,
) -> Result<Self, Box<dyn Error>> {
let transport_protocol = check_listen_addr_integrity(&addr)?;
let public_key = controller_mc.public_key_bytes();
let local_key = {
let sk = ed25519::SecretKey::from_bytes(controller_mc.secret_key_bytes())
.expect("we always pass 32 bytes");
Keypair::Ed25519(sk.into())
};
// Create a keypair for authenticated encryption of the transport.
let noise_key: noise::AuthenticKeypair<noise::X25519Spec> =
noise::Keypair::<noise::X25519Spec>::new()
.into_authentic(&local_key)
.expect("Signing libp2p-noise static DH keypair failed.");
let transport = create_transport_by_protocol(transport_protocol, noise_key);
let peer_id = local_key.public().to_peer_id();
// Swarm creation
let swarm = SwarmBuilder::new(
transport,
TapleNetworkBehavior::new(local_key, bootstrap_nodes.clone()),
peer_id,
)
.executor(Box::new(|fut| {
tokio::spawn(fut);
}))
.build();
// Create channels to communicate events and commands
let (command_sender, command_receiver) = mpsc::channel(10000);
let pendings: HashMap<PeerId, VecDeque<Vec<u8>>> = HashMap::new();
// let controller_to_peer: HashMap<Vec<u8>, PeerId> = HashMap::new();
// let peer_to_controller: HashMap<PeerId, Vec<u8>> = HashMap::new();
let active_get_querys: HashSet<PeerId> = HashSet::new();
Ok(Self {
node_public_key: public_key,
addr,
swarm,
command_sender,
command_receiver,
event_sender,
// controller_mc,
pendings,
// controller_to_peer,
// peer_to_controller,
active_get_querys,
token,
notification_tx,
bootstrap_nodes,
pending_bootstrap_nodes: HashMap::new(),
bootstrap_retries_steam: futures::stream::futures_unordered::FuturesUnordered::new(),
external_addresses,
})
}
/// Network client
pub fn client(&self) -> mpsc::Sender<Command> {
self.command_sender.clone()
}
/// Run network processor.
pub async fn run(mut self) {
debug!("Running network");
for external_address in self.external_addresses.clone().into_iter() {
self.swarm
.add_external_address(external_address, AddressScore::Infinite);
}
for addr in self.addr.iter() {
if let Some(_) = addr.get_port() {
let multiadd: Multiaddr = addr
.to_string()
.unwrap()
.parse()
.expect("String para multiaddress es válida");
let result = self.swarm.listen_on(multiadd);
if result.is_err() {
error!("Error: {:?}", result.unwrap_err());
}
}
}
for (_peer_id, addr) in self.bootstrap_nodes.iter() {
let Ok(()) = self.swarm.dial(addr.to_owned()) else {
panic!("Conection with bootstrap failed");
};
}
loop {
tokio::select! {
event = self.swarm.next() => self.handle_event(
event.expect("Swarm stream to be infinite.")).await,
command = self.command_receiver.recv() => match command {
Some(c) => self.handle_command(c).await,
// Command channel closed, thus shutting down the network
// event loop.
None => {return;},
},
Some(_) = self.bootstrap_retries_steam.next() => self.connect_to_pending_bootstraps(),
_ = self.token.cancelled() => {
log::debug!("Shutdown received");
break;
}
}
}
self.token.cancel();
log::info!("Ended");
}
fn connect_to_pending_bootstraps(&mut self) {
let keys: Vec<PeerId> = self.pending_bootstrap_nodes.keys().cloned().collect();
for peer in keys {
let addr = self.pending_bootstrap_nodes.remove(&peer).unwrap();
let Ok(()) = self.swarm.dial(addr.to_owned()) else {
panic!("Conection with bootstrap failed");
};
}
}
async fn handle_event(&mut self, event: TapleSwarmEvent) {
match event {
SwarmEvent::Dialing(peer_id) => {
debug!("{}: Dialing to peer: {:?}", LOG_TARGET, peer_id);
}
SwarmEvent::NewListenAddr { address, .. } => {
let local_peer_id = *self.swarm.local_peer_id();
info!(
"listening on {:?}",
&address.with(Protocol::P2p(local_peer_id.into()))
);
// let addr_with_peer = address.clone().with(Protocol::P2p(local_peer_id.into()));
// let addr_with_peer_bytes = addr_with_peer.to_vec();
// let crypto_proof = self
// .controller_mc
// .sign(Payload::Buffer(addr_with_peer_bytes))
// .unwrap();
// let value = bincode::serialize(&(addr_with_peer, crypto_proof)).unwrap();
// match self.swarm.behaviour_mut().routing.put_record(
// Record {
// key: Key::new(&self.controller_mc.public_key_bytes()),
// value,
// publisher: None,
// expires: None,
// },
// Quorum::One,
// ) {
// Ok(_) => (),
// Err(_) => panic!("HOLA"), // No debería fallar, ¿Tirarlo si falla?
// }
}
SwarmEvent::ConnectionEstablished {
peer_id, endpoint, ..
} => {
debug!(
"{}: Connected to {} at {}",
LOG_TARGET,
peer_id,
endpoint.get_remote_address()
);
}
SwarmEvent::ConnectionClosed {
peer_id,
cause: Some(error),
..
} => {
debug!(
"{}: Disconnected from {} with error {}",
LOG_TARGET, peer_id, error
);
}
SwarmEvent::OutgoingConnectionError { error, peer_id } => {
// Fixme for refused connections
debug!("{}: Connection error: {}", LOG_TARGET, error);
if let Some(peer_id) = peer_id {
// Delete cache peer id and address for that controller
self.swarm.behaviour_mut().tell.remove_route(&peer_id);
// Check if the peerID was a bootstrap node
if let Some((id, multiaddr)) =
self.bootstrap_nodes.iter().find(|(id, _)| *id == peer_id)
{
self.pending_bootstrap_nodes
.insert(*id, multiaddr.to_owned());
// Insert new timer if there was not any before
if self.bootstrap_retries_steam.len() == 0 {
self.bootstrap_retries_steam
.push(tokio::time::sleep(Duration::from_millis(RETRY_TIMEOUT)));
}
}
// match self.peer_to_controller.remove(&peer_id) {
// Some(controller) => {
// self.controller_to_peer.remove(&controller);
// }
// None => {}
// }
}
}
SwarmEvent::Behaviour(behaviour_event) => match behaviour_event {
NetworkComposedEvent::TellBehaviourEvent(ev) => match ev {
TellBehaviourEvent::RequestSent { peer_id } => {
debug!("{}: Request sent to: {}", LOG_TARGET, peer_id);
// TODO: Thinking about whether to delete here the pending list for a controller
}
TellBehaviourEvent::RequestReceived { data, peer_id } => {
debug!("{}: Request received from: {}", LOG_TARGET, peer_id);
self.event_sender
.send(NetworkEvent::MessageReceived { message: data })
.await
.expect("Event receiver not to be dropped.");
}
TellBehaviourEvent::RequestFailed { peer_id } => {
debug!("{}: Request failed to send to: {}", LOG_TARGET, peer_id);
// Delete cache peer id and address for that controller
// match self.peer_to_controller.remove(&peer_id) {
// Some(controller) => {
// self.controller_to_peer.remove(&controller);
// }
// None => {}
// }
}
},
NetworkComposedEvent::RoutingEvent(ev) => match ev {
RoutingComposedEvent::KademliaEvent(
KademliaEvent::OutboundQueryCompleted {
id: _,
result,
stats: _,
},
) => match result {
QueryResult::GetRecord(Ok(ok)) => {
for PeerRecord { record, .. } in ok.records {
debug!("Got Record {:?}", record);
}
// for PeerRecord {
// record:
// Record {
// key,
// value,
// publisher,
// ..
// },
// ..
// } in ok.records
// {
// let mc_bytes = key.to_vec();
// let mc = Ed25519KeyPair::from_public_key(&mc_bytes);
// match bincode::deserialize::<(Multiaddr, Vec<u8>)>(&value) {
// Ok((addr, crypto_proof)) => {
// // Comprobar la firma
// match mc
// .verify(Payload::Buffer(addr.to_vec()), &crypto_proof)
// {
// Ok(_) => {
// // Si está bien guardar en los hashmaps la info y hacer dial
// // Obtener el peerId a partir de la addr:
// let mut peer_id: Option<PeerId> = None;
// for protocol in addr.clone().iter() {
// if let Protocol::P2p(peer_id_multihash) =
// protocol
// {
// match PeerId::from_multihash(peer_id_multihash) {
// Ok(pid) => {
// if let Some(peer_id_publisher) = publisher {
// // Comprobación de que el publisher es el propio peerId que buscamos
// if pid != peer_id_publisher {
// continue;
// }
// }
// peer_id = Some(pid);
// break;
// },
// Err(_) => debug!("Error al parsear multiaddr a peerId en get"),
// }
// }
// }
// if peer_id.is_none() {
// continue;
// }
// let peer_id = peer_id.unwrap();
// match self.swarm.dial(addr.clone()) {
// Ok(_) => {
// debug!("Success en DIAL");
// // Si funciona el dial actualizar las estructuras de datos
// self.routing_cache
// .insert(peer_id, vec![addr]);
// // self.controller_to_peer
// // .insert(mc_bytes.clone(), peer_id);
// // self.peer_to_controller
// // .insert(peer_id, mc_bytes.clone());
// self.active_get_querys.remove(&peer_id);
// // Mandar mensajes pendientes
// self.send_pendings(&peer_id);
// }
// Err(e) => {
// debug!("{}", e);
// continue;
// }
// }
// }
// Err(_) => {
// continue;
// }
// }
// }
// Err(e) => {
// debug!("DESERIALICE VA MAL");
// debug!("Problemas al recuperar la Multiaddr del value del Record: {:?}", e);
// }
// }
// }
}
QueryResult::GetRecord(Err(err)) => {
debug!("Failed to get record: {:?}", err);
// let mc_bytes = err.key().to_vec();
// self.active_get_querys.remove(&mc_bytes);
}
QueryResult::PutRecord(Ok(PutRecordOk { key })) => {
debug!("Successfully put record {:?}", key);
}
QueryResult::PutRecord(Err(err)) => {
debug!("Failed to put record: {:?}", err);
}
QueryResult::GetProviders(Ok(ok)) => {
for peer in ok.providers {
debug!("Peer {:?} provides key {:?}", peer, ok.key.as_ref());
}
}
QueryResult::GetProviders(Err(err)) => {
debug!("Failed to get providers: {:?}", err);
}
QueryResult::StartProviding(Ok(AddProviderOk { key })) => {
debug!("Successfully put provider record {:?}", key);
}
QueryResult::StartProviding(Err(err)) => {
debug!("Failed to put provider record: {:?}", err);
}
QueryResult::GetClosestPeers(gcp_res) => match gcp_res {
Ok(GetClosestPeersOk { key, .. }) => {
debug!("GCP OK: {:?}", key);
let peer_id = match PeerId::from_bytes(&key) {
Ok(peer_id) => peer_id,
Err(_) => {
log::error!("Error parsing PeerId from GCP Ok response");
return;
}
};
self.active_get_querys.remove(&peer_id);
}
Err(GetClosestPeersError::Timeout { key, .. }) => {
debug!("GCP ERR: {:?}", key);
let peer_id = match PeerId::from_bytes(&key) {
Ok(peer_id) => peer_id,
Err(_) => {
log::error!("Error parsing PeerId from GCP Err response");
return;
}
};
self.active_get_querys.remove(&peer_id);
}
},
e => {
debug!("Unhandled QueryResult {:?}", e);
}
},
RoutingComposedEvent::KademliaEvent(KademliaEvent::RoutablePeer {
peer,
address,
}) => {
debug!(
"{}: Routable Peer: {:?}; Address: {:?}.",
LOG_TARGET, peer, address,
);
if self.active_get_querys.contains(&peer) {
self.swarm.behaviour_mut().tell.set_route(peer, address);
self.active_get_querys.remove(&peer);
self.send_pendings(&peer);
}
}
_ => {
self.swarm.behaviour_mut().routing.handle_event(ev);
}
},
},
other => {
debug!("{}: Unhandled event {:?}", LOG_TARGET, other);
}
}
}
async fn handle_command(&mut self, command: Command) {
match command {
Command::StartProviding { keys } => {
for key in keys {
self.swarm.behaviour_mut().routing.start_providing(&key);
}
}
Command::SendMessage { receptor, message } => {
// Check if we are the receptor
if receptor == self.node_public_key {
// It is not needed to send the message
self.event_sender
.send(NetworkEvent::MessageReceived { message })
.await
.expect("Event receiver not to be dropped.");
return;
}
debug!("{}: Sending Message", LOG_TARGET);
// Check if we have the peerId of the controller in cache
let peer_id = match libp2p::identity::ed25519::PublicKey::decode(&receptor) {
Ok(public_key) => {
let public_key = libp2p::core::PublicKey::Ed25519(public_key);
PeerId::from_public_key(&public_key)
}
Err(_error) => {
log::error!(
"Error al tratar de enviar mensaje, el controllerId no es válido"
);
return;
}
};
// If we have it check if we have the address (need to fill in with cache addresses)
let addresses_of_peer = self.swarm.behaviour_mut().addresses_of_peer(&peer_id);
if !addresses_of_peer.is_empty() {
debug!("MANDANDO MENSAJE, TENGO DIRECCIÓN");
// If we have an address, send the message
self.swarm
.behaviour_mut()
.tell
.send_message(&peer_id, &message);
return;
}
// Check if we are not already making the same query in the DHT
if let None = self.active_get_querys.get(&peer_id) {
// Make petition if we dont have it's PeerId to store it
self.active_get_querys.insert(peer_id.clone());
let query_id = self
.swarm
.behaviour_mut()
.routing
.get_closest_peers(peer_id.clone());
debug!(
"Query get_record {:?} para mandar request a {:?}",
query_id, peer_id
);
}
// Store de message in the pendings for that controller
match self.pendings.get_mut(&peer_id) {
Some(pending_list) => {
if pending_list.len() >= 100 {
pending_list.pop_front();
}
pending_list.push_back(message);
}
None => {
let mut pendings = VecDeque::new();
pendings.push_back(message);
self.pendings.insert(peer_id, pendings);
}
}
}
Command::Bootstrap => {
self.swarm.behaviour_mut().routing.bootstrap();
}
}
}
/// Send all the pending messages to the specified controller
fn send_pendings(&mut self, peer_id: &PeerId) {
let pending_messages = self.pendings.remove(peer_id);
if let Some(pending_messages) = pending_messages {
for message in pending_messages.into_iter() {
debug!("MANDANDO MENSAJE");
self.swarm
.behaviour_mut()
.tell
.send_message(&peer_id, &message);
}
}
}
pub fn local_peer_id(&self) -> &PeerId {
self.swarm.local_peer_id()
}
}
fn create_ip4_ip6_transport(
noise_key: noise::AuthenticKeypair<noise::X25519Spec>,
) -> Boxed<(PeerId, StreamMuxerBox)> {
let transport = TokioTcpConfig::new()
.nodelay(true)
.upgrade(upgrade::Version::V1)
.authenticate(noise::NoiseConfig::xx(noise_key.clone()).into_authenticated())
.multiplex(mplex::MplexConfig::new())
.boxed();
// DNS
match dns::GenDnsConfig::system(transport) {
Ok(t) => t.boxed(),
Err(_) => {
// TODO: vuelvo a crear el transporte porque no tiene clone, quizás sería interesante poner una variable de entorno que diga si estamos en android y hacer lo segundo directamente en ese caso
let transport = TokioTcpConfig::new()
.nodelay(true)
.upgrade(upgrade::Version::V1)
.authenticate(noise::NoiseConfig::xx(noise_key.clone()).into_authenticated())
.multiplex(mplex::MplexConfig::new())
.boxed();
// TODO: Lo mismo aquí
match dns::GenDnsConfig::custom(
transport,
dns::ResolverConfig::cloudflare(),
dns::ResolverOpts::default(),
) {
Ok(t) => t.boxed(),
Err(_) => TokioTcpConfig::new()
.nodelay(true)
.upgrade(upgrade::Version::V1)
.authenticate(noise::NoiseConfig::xx(noise_key.clone()).into_authenticated())
.multiplex(mplex::MplexConfig::new())
.boxed(),
}
}
}
}
fn create_transport_by_protocol(
protocol: ListenProtocols,
noise_key: noise::AuthenticKeypair<noise::X25519Spec>,
) -> Boxed<(PeerId, StreamMuxerBox)> {
match protocol {
ListenProtocols::IP => create_ip4_ip6_transport(noise_key),
ListenProtocols::Memory => MemoryTransport
.upgrade(upgrade::Version::V1)
.authenticate(noise::NoiseConfig::xx(noise_key.clone()).into_authenticated())
.multiplex(yamux::YamuxConfig::default())
.boxed(),
}
}