use secp256k1::key::{SecretKey,PublicKey};
use ln::msgs;
use util::ser::{Writeable, Writer, Readable};
use ln::peer_channel_encryptor::{PeerChannelEncryptor,NextNoiseStep};
use util::byte_utils;
use util::events::{MessageSendEvent};
use util::logger::Logger;
use std::collections::{HashMap,hash_map,HashSet,LinkedList};
use std::sync::{Arc, Mutex};
use std::sync::atomic::{AtomicUsize, Ordering};
use std::{cmp,error,hash,fmt};
use bitcoin_hashes::sha256::Hash as Sha256;
use bitcoin_hashes::sha256::HashEngine as Sha256Engine;
use bitcoin_hashes::{HashEngine, Hash};
pub struct MessageHandler {
pub chan_handler: Arc<msgs::ChannelMessageHandler>,
pub route_handler: Arc<msgs::RoutingMessageHandler>,
}
pub trait SocketDescriptor : cmp::Eq + hash::Hash + Clone {
fn send_data(&mut self, data: &[u8], resume_read: bool) -> usize;
fn disconnect_socket(&mut self);
}
pub struct PeerHandleError {
no_connection_possible: bool,
}
impl fmt::Debug for PeerHandleError {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
formatter.write_str("Peer Sent Invalid Data")
}
}
impl fmt::Display for PeerHandleError {
fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
formatter.write_str("Peer Sent Invalid Data")
}
}
impl error::Error for PeerHandleError {
fn description(&self) -> &str {
"Peer Sent Invalid Data"
}
}
enum InitSyncTracker{
NoSyncRequested,
ChannelsSyncing(u64),
NodesSyncing(PublicKey),
}
struct Peer {
channel_encryptor: PeerChannelEncryptor,
outbound: bool,
their_node_id: Option<PublicKey>,
their_global_features: Option<msgs::GlobalFeatures>,
their_local_features: Option<msgs::LocalFeatures>,
pending_outbound_buffer: LinkedList<Vec<u8>>,
pending_outbound_buffer_first_msg_offset: usize,
awaiting_write_event: bool,
pending_read_buffer: Vec<u8>,
pending_read_buffer_pos: usize,
pending_read_is_header: bool,
sync_status: InitSyncTracker,
}
impl Peer {
fn should_forward_channel(&self, channel_id: u64)->bool{
match self.sync_status {
InitSyncTracker::NoSyncRequested => true,
InitSyncTracker::ChannelsSyncing(i) => i < channel_id,
InitSyncTracker::NodesSyncing(_) => true,
}
}
}
struct PeerHolder<Descriptor: SocketDescriptor> {
peers: HashMap<Descriptor, Peer>,
peers_needing_send: HashSet<Descriptor>,
node_id_to_descriptor: HashMap<PublicKey, Descriptor>,
}
struct MutPeerHolder<'a, Descriptor: SocketDescriptor + 'a> {
peers: &'a mut HashMap<Descriptor, Peer>,
peers_needing_send: &'a mut HashSet<Descriptor>,
node_id_to_descriptor: &'a mut HashMap<PublicKey, Descriptor>,
}
impl<Descriptor: SocketDescriptor> PeerHolder<Descriptor> {
fn borrow_parts(&mut self) -> MutPeerHolder<Descriptor> {
MutPeerHolder {
peers: &mut self.peers,
peers_needing_send: &mut self.peers_needing_send,
node_id_to_descriptor: &mut self.node_id_to_descriptor,
}
}
}
#[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))]
fn _check_usize_is_32_or_64() {
unsafe { mem::transmute::<*const usize, [u8; 4]>(panic!()); }
}
pub struct PeerManager<Descriptor: SocketDescriptor> {
message_handler: MessageHandler,
peers: Mutex<PeerHolder<Descriptor>>,
our_node_secret: SecretKey,
ephemeral_key_midstate: Sha256Engine,
peer_counter_low: AtomicUsize,
peer_counter_high: AtomicUsize,
initial_syncs_sent: AtomicUsize,
logger: Arc<Logger>,
}
struct VecWriter(Vec<u8>);
impl Writer for VecWriter {
fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
self.0.extend_from_slice(buf);
Ok(())
}
fn size_hint(&mut self, size: usize) {
self.0.reserve_exact(size);
}
}
macro_rules! encode_msg {
($msg: expr, $msg_code: expr) => {{
let mut msg = VecWriter(Vec::new());
($msg_code as u16).write(&mut msg).unwrap();
$msg.write(&mut msg).unwrap();
msg.0
}}
}
const INITIAL_SYNCS_TO_SEND: usize = 5;
impl<Descriptor: SocketDescriptor> PeerManager<Descriptor> {
pub fn new(message_handler: MessageHandler, our_node_secret: SecretKey, ephemeral_random_data: &[u8; 32], logger: Arc<Logger>) -> PeerManager<Descriptor> {
let mut ephemeral_key_midstate = Sha256::engine();
ephemeral_key_midstate.input(ephemeral_random_data);
PeerManager {
message_handler: message_handler,
peers: Mutex::new(PeerHolder {
peers: HashMap::new(),
peers_needing_send: HashSet::new(),
node_id_to_descriptor: HashMap::new()
}),
our_node_secret: our_node_secret,
ephemeral_key_midstate,
peer_counter_low: AtomicUsize::new(0),
peer_counter_high: AtomicUsize::new(0),
initial_syncs_sent: AtomicUsize::new(0),
logger,
}
}
pub fn get_peer_node_ids(&self) -> Vec<PublicKey> {
let peers = self.peers.lock().unwrap();
peers.peers.values().filter_map(|p| {
if !p.channel_encryptor.is_ready_for_encryption() || p.their_global_features.is_none() {
return None;
}
p.their_node_id
}).collect()
}
fn get_ephemeral_key(&self) -> SecretKey {
let mut ephemeral_hash = self.ephemeral_key_midstate.clone();
let low = self.peer_counter_low.fetch_add(1, Ordering::AcqRel);
let high = if low == 0 {
self.peer_counter_high.fetch_add(1, Ordering::AcqRel)
} else {
self.peer_counter_high.load(Ordering::Acquire)
};
ephemeral_hash.input(&byte_utils::le64_to_array(low as u64));
ephemeral_hash.input(&byte_utils::le64_to_array(high as u64));
SecretKey::from_slice(&Sha256::from_engine(ephemeral_hash).into_inner()).expect("You broke SHA-256!")
}
pub fn new_outbound_connection(&self, their_node_id: PublicKey, descriptor: Descriptor) -> Result<Vec<u8>, PeerHandleError> {
let mut peer_encryptor = PeerChannelEncryptor::new_outbound(their_node_id.clone(), self.get_ephemeral_key());
let res = peer_encryptor.get_act_one().to_vec();
let pending_read_buffer = [0; 50].to_vec();
let mut peers = self.peers.lock().unwrap();
if peers.peers.insert(descriptor, Peer {
channel_encryptor: peer_encryptor,
outbound: true,
their_node_id: None,
their_global_features: None,
their_local_features: None,
pending_outbound_buffer: LinkedList::new(),
pending_outbound_buffer_first_msg_offset: 0,
awaiting_write_event: false,
pending_read_buffer: pending_read_buffer,
pending_read_buffer_pos: 0,
pending_read_is_header: false,
sync_status: InitSyncTracker::NoSyncRequested,
}).is_some() {
panic!("PeerManager driver duplicated descriptors!");
};
Ok(res)
}
pub fn new_inbound_connection(&self, descriptor: Descriptor) -> Result<(), PeerHandleError> {
let peer_encryptor = PeerChannelEncryptor::new_inbound(&self.our_node_secret);
let pending_read_buffer = [0; 50].to_vec();
let mut peers = self.peers.lock().unwrap();
if peers.peers.insert(descriptor, Peer {
channel_encryptor: peer_encryptor,
outbound: false,
their_node_id: None,
their_global_features: None,
their_local_features: None,
pending_outbound_buffer: LinkedList::new(),
pending_outbound_buffer_first_msg_offset: 0,
awaiting_write_event: false,
pending_read_buffer: pending_read_buffer,
pending_read_buffer_pos: 0,
pending_read_is_header: false,
sync_status: InitSyncTracker::NoSyncRequested,
}).is_some() {
panic!("PeerManager driver duplicated descriptors!");
};
Ok(())
}
fn do_attempt_write_data(&self, descriptor: &mut Descriptor, peer: &mut Peer) {
macro_rules! encode_and_send_msg {
($msg: expr, $msg_code: expr) => {
{
log_trace!(self, "Encoding and sending sync update message of type {} to {}", $msg_code, log_pubkey!(peer.their_node_id.unwrap()));
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
}
}
}
const MSG_BUFF_SIZE: usize = 10;
while !peer.awaiting_write_event {
if peer.pending_outbound_buffer.len() < MSG_BUFF_SIZE {
match peer.sync_status {
InitSyncTracker::NoSyncRequested => {},
InitSyncTracker::ChannelsSyncing(c) if c < 0xffff_ffff_ffff_ffff => {
let steps = ((MSG_BUFF_SIZE - peer.pending_outbound_buffer.len() + 2) / 3) as u8;
let all_messages = self.message_handler.route_handler.get_next_channel_announcements(0, steps);
for &(ref announce, ref update_a, ref update_b) in all_messages.iter() {
encode_and_send_msg!(announce, 256);
encode_and_send_msg!(update_a, 258);
encode_and_send_msg!(update_b, 258);
peer.sync_status = InitSyncTracker::ChannelsSyncing(announce.contents.short_channel_id + 1);
}
if all_messages.is_empty() || all_messages.len() != steps as usize {
peer.sync_status = InitSyncTracker::ChannelsSyncing(0xffff_ffff_ffff_ffff);
}
},
InitSyncTracker::ChannelsSyncing(c) if c == 0xffff_ffff_ffff_ffff => {
let steps = (MSG_BUFF_SIZE - peer.pending_outbound_buffer.len()) as u8;
let all_messages = self.message_handler.route_handler.get_next_node_announcements(None, steps);
for msg in all_messages.iter() {
encode_and_send_msg!(msg, 256);
peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
}
if all_messages.is_empty() || all_messages.len() != steps as usize {
peer.sync_status = InitSyncTracker::NoSyncRequested;
}
},
InitSyncTracker::ChannelsSyncing(_) => unreachable!(),
InitSyncTracker::NodesSyncing(key) => {
let steps = (MSG_BUFF_SIZE - peer.pending_outbound_buffer.len()) as u8;
let all_messages = self.message_handler.route_handler.get_next_node_announcements(Some(&key), steps);
for msg in all_messages.iter() {
encode_and_send_msg!(msg, 256);
peer.sync_status = InitSyncTracker::NodesSyncing(msg.contents.node_id);
}
if all_messages.is_empty() || all_messages.len() != steps as usize {
peer.sync_status = InitSyncTracker::NoSyncRequested;
}
},
}
}
if {
let next_buff = match peer.pending_outbound_buffer.front() {
None => return,
Some(buff) => buff,
};
let should_be_reading = peer.pending_outbound_buffer.len() < MSG_BUFF_SIZE;
let pending = &next_buff[peer.pending_outbound_buffer_first_msg_offset..];
let data_sent = descriptor.send_data(pending, should_be_reading);
peer.pending_outbound_buffer_first_msg_offset += data_sent;
if peer.pending_outbound_buffer_first_msg_offset == next_buff.len() { true } else { false }
} {
peer.pending_outbound_buffer_first_msg_offset = 0;
peer.pending_outbound_buffer.pop_front();
} else {
peer.awaiting_write_event = true;
}
}
}
pub fn write_event(&self, descriptor: &mut Descriptor) -> Result<(), PeerHandleError> {
let mut peers = self.peers.lock().unwrap();
match peers.peers.get_mut(descriptor) {
None => panic!("Descriptor for write_event is not already known to PeerManager"),
Some(peer) => {
peer.awaiting_write_event = false;
self.do_attempt_write_data(descriptor, peer);
}
};
Ok(())
}
pub fn read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
match self.do_read_event(peer_descriptor, data) {
Ok(res) => Ok(res),
Err(e) => {
self.disconnect_event_internal(peer_descriptor, e.no_connection_possible);
Err(e)
}
}
}
fn do_read_event(&self, peer_descriptor: &mut Descriptor, data: Vec<u8>) -> Result<bool, PeerHandleError> {
let pause_read = {
let mut peers_lock = self.peers.lock().unwrap();
let peers = peers_lock.borrow_parts();
let pause_read = match peers.peers.get_mut(peer_descriptor) {
None => panic!("Descriptor for read_event is not already known to PeerManager"),
Some(peer) => {
assert!(peer.pending_read_buffer.len() > 0);
assert!(peer.pending_read_buffer.len() > peer.pending_read_buffer_pos);
let mut read_pos = 0;
while read_pos < data.len() {
{
let data_to_copy = cmp::min(peer.pending_read_buffer.len() - peer.pending_read_buffer_pos, data.len() - read_pos);
peer.pending_read_buffer[peer.pending_read_buffer_pos..peer.pending_read_buffer_pos + data_to_copy].copy_from_slice(&data[read_pos..read_pos + data_to_copy]);
read_pos += data_to_copy;
peer.pending_read_buffer_pos += data_to_copy;
}
if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
peer.pending_read_buffer_pos = 0;
macro_rules! encode_and_send_msg {
($msg: expr, $msg_code: expr) => {
{
log_trace!(self, "Encoding and sending message of type {} to {}", $msg_code, log_pubkey!(peer.their_node_id.unwrap()));
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
peers.peers_needing_send.insert(peer_descriptor.clone());
}
}
}
macro_rules! try_potential_handleerror {
($thing: expr) => {
match $thing {
Ok(x) => x,
Err(e) => {
match e.action {
msgs::ErrorAction::DisconnectPeer { msg: _ } => {
log_trace!(self, "Got Err handling message, disconnecting peer because {}", e.err);
return Err(PeerHandleError{ no_connection_possible: false });
},
msgs::ErrorAction::IgnoreError => {
log_trace!(self, "Got Err handling message, ignoring because {}", e.err);
continue;
},
msgs::ErrorAction::SendErrorMessage { msg } => {
log_trace!(self, "Got Err handling message, sending Error message because {}", e.err);
encode_and_send_msg!(msg, 17);
continue;
},
}
}
};
}
}
macro_rules! try_potential_decodeerror {
($thing: expr) => {
match $thing {
Ok(x) => x,
Err(e) => {
match e {
msgs::DecodeError::UnknownVersion => return Err(PeerHandleError{ no_connection_possible: false }),
msgs::DecodeError::UnknownRequiredFeature => {
log_debug!(self, "Got a channel/node announcement with an known required feature flag, you may want to update!");
continue;
},
msgs::DecodeError::InvalidValue => {
log_debug!(self, "Got an invalid value while deserializing message");
return Err(PeerHandleError{ no_connection_possible: false });
},
msgs::DecodeError::ShortRead => {
log_debug!(self, "Deserialization failed due to shortness of message");
return Err(PeerHandleError{ no_connection_possible: false });
},
msgs::DecodeError::ExtraAddressesPerType => {
log_debug!(self, "Error decoding message, ignoring due to lnd spec incompatibility. See https://github.com/lightningnetwork/lnd/issues/1407");
continue;
},
msgs::DecodeError::BadLengthDescriptor => return Err(PeerHandleError{ no_connection_possible: false }),
msgs::DecodeError::Io(_) => return Err(PeerHandleError{ no_connection_possible: false }),
}
}
};
}
}
macro_rules! insert_node_id {
() => {
match peers.node_id_to_descriptor.entry(peer.their_node_id.unwrap()) {
hash_map::Entry::Occupied(_) => {
log_trace!(self, "Got second connection with {}, closing", log_pubkey!(peer.their_node_id.unwrap()));
peer.their_node_id = None;
return Err(PeerHandleError{ no_connection_possible: false })
},
hash_map::Entry::Vacant(entry) => {
log_trace!(self, "Finished noise handshake for connection with {}", log_pubkey!(peer.their_node_id.unwrap()));
entry.insert(peer_descriptor.clone())
},
};
}
}
let next_step = peer.channel_encryptor.get_noise_step();
match next_step {
NextNoiseStep::ActOne => {
let act_two = try_potential_handleerror!(peer.channel_encryptor.process_act_one_with_keys(&peer.pending_read_buffer[..], &self.our_node_secret, self.get_ephemeral_key())).to_vec();
peer.pending_outbound_buffer.push_back(act_two);
peer.pending_read_buffer = [0; 66].to_vec();
},
NextNoiseStep::ActTwo => {
let (act_three, their_node_id) = try_potential_handleerror!(peer.channel_encryptor.process_act_two(&peer.pending_read_buffer[..], &self.our_node_secret));
peer.pending_outbound_buffer.push_back(act_three.to_vec());
peer.pending_read_buffer = [0; 18].to_vec();
peer.pending_read_is_header = true;
peer.their_node_id = Some(their_node_id);
insert_node_id!();
let mut local_features = msgs::LocalFeatures::new();
if self.initial_syncs_sent.load(Ordering::Acquire) < INITIAL_SYNCS_TO_SEND {
self.initial_syncs_sent.fetch_add(1, Ordering::AcqRel);
local_features.set_initial_routing_sync();
}
encode_and_send_msg!(msgs::Init {
global_features: msgs::GlobalFeatures::new(),
local_features,
}, 16);
},
NextNoiseStep::ActThree => {
let their_node_id = try_potential_handleerror!(peer.channel_encryptor.process_act_three(&peer.pending_read_buffer[..]));
peer.pending_read_buffer = [0; 18].to_vec();
peer.pending_read_is_header = true;
peer.their_node_id = Some(their_node_id);
insert_node_id!();
},
NextNoiseStep::NoiseComplete => {
if peer.pending_read_is_header {
let msg_len = try_potential_handleerror!(peer.channel_encryptor.decrypt_length_header(&peer.pending_read_buffer[..]));
peer.pending_read_buffer = Vec::with_capacity(msg_len as usize + 16);
peer.pending_read_buffer.resize(msg_len as usize + 16, 0);
if msg_len < 2 {
return Err(PeerHandleError{ no_connection_possible: false });
}
peer.pending_read_is_header = false;
} else {
let msg_data = try_potential_handleerror!(peer.channel_encryptor.decrypt_message(&peer.pending_read_buffer[..]));
assert!(msg_data.len() >= 2);
peer.pending_read_buffer = [0; 18].to_vec();
peer.pending_read_is_header = true;
let msg_type = byte_utils::slice_to_be16(&msg_data[0..2]);
log_trace!(self, "Received message of type {} from {}", msg_type, log_pubkey!(peer.their_node_id.unwrap()));
if msg_type != 16 && peer.their_global_features.is_none() {
log_trace!(self, "Peer {} sent non-Init first message", log_pubkey!(peer.their_node_id.unwrap()));
return Err(PeerHandleError{ no_connection_possible: false });
}
let mut reader = ::std::io::Cursor::new(&msg_data[2..]);
match msg_type {
16 => {
let msg = try_potential_decodeerror!(msgs::Init::read(&mut reader));
if msg.global_features.requires_unknown_bits() {
log_info!(self, "Peer global features required unknown version bits");
return Err(PeerHandleError{ no_connection_possible: true });
}
if msg.local_features.requires_unknown_bits() {
log_info!(self, "Peer local features required unknown version bits");
return Err(PeerHandleError{ no_connection_possible: true });
}
if peer.their_global_features.is_some() {
return Err(PeerHandleError{ no_connection_possible: false });
}
log_info!(self, "Received peer Init message: data_loss_protect: {}, initial_routing_sync: {}, upfront_shutdown_script: {}, unkown local flags: {}, unknown global flags: {}",
if msg.local_features.supports_data_loss_protect() { "supported" } else { "not supported"},
if msg.local_features.initial_routing_sync() { "requested" } else { "not requested" },
if msg.local_features.supports_upfront_shutdown_script() { "supported" } else { "not supported"},
if msg.local_features.supports_unknown_bits() { "present" } else { "none" },
if msg.global_features.supports_unknown_bits() { "present" } else { "none" });
if msg.local_features.initial_routing_sync() {
peer.sync_status = InitSyncTracker::ChannelsSyncing(0);
peers.peers_needing_send.insert(peer_descriptor.clone());
}
peer.their_global_features = Some(msg.global_features);
peer.their_local_features = Some(msg.local_features);
if !peer.outbound {
let mut local_features = msgs::LocalFeatures::new();
if self.initial_syncs_sent.load(Ordering::Acquire) < INITIAL_SYNCS_TO_SEND {
self.initial_syncs_sent.fetch_add(1, Ordering::AcqRel);
local_features.set_initial_routing_sync();
}
encode_and_send_msg!(msgs::Init {
global_features: msgs::GlobalFeatures::new(),
local_features,
}, 16);
}
self.message_handler.chan_handler.peer_connected(&peer.their_node_id.unwrap());
},
17 => {
let msg = try_potential_decodeerror!(msgs::ErrorMessage::read(&mut reader));
let mut data_is_printable = true;
for b in msg.data.bytes() {
if b < 32 || b > 126 {
data_is_printable = false;
break;
}
}
if data_is_printable {
log_debug!(self, "Got Err message from {}: {}", log_pubkey!(peer.their_node_id.unwrap()), msg.data);
} else {
log_debug!(self, "Got Err message from {} with non-ASCII error message", log_pubkey!(peer.their_node_id.unwrap()));
}
self.message_handler.chan_handler.handle_error(&peer.their_node_id.unwrap(), &msg);
if msg.channel_id == [0; 32] {
return Err(PeerHandleError{ no_connection_possible: true });
}
},
18 => {
let msg = try_potential_decodeerror!(msgs::Ping::read(&mut reader));
if msg.ponglen < 65532 {
let resp = msgs::Pong { byteslen: msg.ponglen };
encode_and_send_msg!(resp, 19);
}
},
19 => {
try_potential_decodeerror!(msgs::Pong::read(&mut reader));
},
32 => {
let msg = try_potential_decodeerror!(msgs::OpenChannel::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_open_channel(&peer.their_node_id.unwrap(), peer.their_local_features.clone().unwrap(), &msg));
},
33 => {
let msg = try_potential_decodeerror!(msgs::AcceptChannel::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_accept_channel(&peer.their_node_id.unwrap(), peer.their_local_features.clone().unwrap(), &msg));
},
34 => {
let msg = try_potential_decodeerror!(msgs::FundingCreated::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_funding_created(&peer.their_node_id.unwrap(), &msg));
},
35 => {
let msg = try_potential_decodeerror!(msgs::FundingSigned::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_funding_signed(&peer.their_node_id.unwrap(), &msg));
},
36 => {
let msg = try_potential_decodeerror!(msgs::FundingLocked::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_funding_locked(&peer.their_node_id.unwrap(), &msg));
},
38 => {
let msg = try_potential_decodeerror!(msgs::Shutdown::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), &msg));
},
39 => {
let msg = try_potential_decodeerror!(msgs::ClosingSigned::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg));
},
128 => {
let msg = try_potential_decodeerror!(msgs::UpdateAddHTLC::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_update_add_htlc(&peer.their_node_id.unwrap(), &msg));
},
130 => {
let msg = try_potential_decodeerror!(msgs::UpdateFulfillHTLC::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fulfill_htlc(&peer.their_node_id.unwrap(), &msg));
},
131 => {
let msg = try_potential_decodeerror!(msgs::UpdateFailHTLC::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg));
},
135 => {
let msg = try_potential_decodeerror!(msgs::UpdateFailMalformedHTLC::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fail_malformed_htlc(&peer.their_node_id.unwrap(), &msg));
},
132 => {
let msg = try_potential_decodeerror!(msgs::CommitmentSigned::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg));
},
133 => {
let msg = try_potential_decodeerror!(msgs::RevokeAndACK::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_revoke_and_ack(&peer.their_node_id.unwrap(), &msg));
},
134 => {
let msg = try_potential_decodeerror!(msgs::UpdateFee::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fee(&peer.their_node_id.unwrap(), &msg));
},
136 => {
let msg = try_potential_decodeerror!(msgs::ChannelReestablish::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_channel_reestablish(&peer.their_node_id.unwrap(), &msg));
},
259 => {
let msg = try_potential_decodeerror!(msgs::AnnouncementSignatures::read(&mut reader));
try_potential_handleerror!(self.message_handler.chan_handler.handle_announcement_signatures(&peer.their_node_id.unwrap(), &msg));
},
256 => {
let msg = try_potential_decodeerror!(msgs::ChannelAnnouncement::read(&mut reader));
let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_announcement(&msg));
if should_forward {
}
},
257 => {
let msg = try_potential_decodeerror!(msgs::NodeAnnouncement::read(&mut reader));
let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_node_announcement(&msg));
if should_forward {
}
},
258 => {
let msg = try_potential_decodeerror!(msgs::ChannelUpdate::read(&mut reader));
let should_forward = try_potential_handleerror!(self.message_handler.route_handler.handle_channel_update(&msg));
if should_forward {
}
},
_ => {
if (msg_type & 1) == 0 {
return Err(PeerHandleError{ no_connection_possible: true });
}
},
}
}
}
}
}
}
self.do_attempt_write_data(peer_descriptor, peer);
peer.pending_outbound_buffer.len() > 10
}
};
pause_read
};
Ok(pause_read)
}
pub fn process_events(&self) {
{
let mut events_generated = self.message_handler.chan_handler.get_and_clear_pending_msg_events();
let mut peers_lock = self.peers.lock().unwrap();
let peers = peers_lock.borrow_parts();
for event in events_generated.drain(..) {
macro_rules! get_peer_for_forwarding {
($node_id: expr, $handle_no_such_peer: block) => {
{
let descriptor = match peers.node_id_to_descriptor.get($node_id) {
Some(descriptor) => descriptor.clone(),
None => {
$handle_no_such_peer;
continue;
},
};
match peers.peers.get_mut(&descriptor) {
Some(peer) => {
if peer.their_global_features.is_none() {
$handle_no_such_peer;
continue;
}
(descriptor, peer)
},
None => panic!("Inconsistent peers set state!"),
}
}
}
}
match event {
MessageSendEvent::SendAcceptChannel { ref node_id, ref msg } => {
log_trace!(self, "Handling SendAcceptChannel event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.temporary_channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 33)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendOpenChannel { ref node_id, ref msg } => {
log_trace!(self, "Handling SendOpenChannel event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.temporary_channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 32)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendFundingCreated { ref node_id, ref msg } => {
log_trace!(self, "Handling SendFundingCreated event in peer_handler for node {} for channel {} (which becomes {})",
log_pubkey!(node_id),
log_bytes!(msg.temporary_channel_id),
log_funding_channel_id!(msg.funding_txid, msg.funding_output_index));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 34)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendFundingSigned { ref node_id, ref msg } => {
log_trace!(self, "Handling SendFundingSigned event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 35)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendFundingLocked { ref node_id, ref msg } => {
log_trace!(self, "Handling SendFundingLocked event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 36)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendAnnouncementSignatures { ref node_id, ref msg } => {
log_trace!(self, "Handling SendAnnouncementSignatures event in peer_handler for node {} for channel {})",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 259)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::UpdateHTLCs { ref node_id, updates: msgs::CommitmentUpdate { ref update_add_htlcs, ref update_fulfill_htlcs, ref update_fail_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
log_trace!(self, "Handling UpdateHTLCs event in peer_handler for node {} with {} adds, {} fulfills, {} fails for channel {}",
log_pubkey!(node_id),
update_add_htlcs.len(),
update_fulfill_htlcs.len(),
update_fail_htlcs.len(),
log_bytes!(commitment_signed.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
for msg in update_add_htlcs {
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 128)));
}
for msg in update_fulfill_htlcs {
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 130)));
}
for msg in update_fail_htlcs {
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 131)));
}
for msg in update_fail_malformed_htlcs {
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 135)));
}
if let &Some(ref msg) = update_fee {
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 134)));
}
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(commitment_signed, 132)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
log_trace!(self, "Handling SendRevokeAndACK event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 133)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendClosingSigned { ref node_id, ref msg } => {
log_trace!(self, "Handling SendClosingSigned event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 39)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendShutdown { ref node_id, ref msg } => {
log_trace!(self, "Handling Shutdown event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 38)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
log_trace!(self, "Handling SendChannelReestablish event in peer_handler for node {} for channel {}",
log_pubkey!(node_id),
log_bytes!(msg.channel_id));
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 136)));
self.do_attempt_write_data(&mut descriptor, peer);
},
MessageSendEvent::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
log_trace!(self, "Handling BroadcastChannelAnnouncement event in peer_handler for short channel id {}", msg.contents.short_channel_id);
if self.message_handler.route_handler.handle_channel_announcement(msg).is_ok() && self.message_handler.route_handler.handle_channel_update(update_msg).is_ok() {
let encoded_msg = encode_msg!(msg, 256);
let encoded_update_msg = encode_msg!(update_msg, 258);
for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_global_features.is_none() ||
!peer.should_forward_channel(msg.contents.short_channel_id) {
continue
}
match peer.their_node_id {
None => continue,
Some(their_node_id) => {
if their_node_id == msg.contents.node_id_1 || their_node_id == msg.contents.node_id_2 {
continue
}
}
}
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_update_msg[..]));
self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
}
}
},
MessageSendEvent::BroadcastChannelUpdate { ref msg } => {
log_trace!(self, "Handling BroadcastChannelUpdate event in peer_handler for short channel id {}", msg.contents.short_channel_id);
if self.message_handler.route_handler.handle_channel_update(msg).is_ok() {
let encoded_msg = encode_msg!(msg, 258);
for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
if !peer.channel_encryptor.is_ready_for_encryption() || peer.their_global_features.is_none() ||
!peer.should_forward_channel(msg.contents.short_channel_id) {
continue
}
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
self.do_attempt_write_data(&mut (*descriptor).clone(), peer);
}
}
},
MessageSendEvent::PaymentFailureNetworkUpdate { ref update } => {
self.message_handler.route_handler.handle_htlc_fail_channel_update(update);
},
MessageSendEvent::HandleError { ref node_id, ref action } => {
match *action {
msgs::ErrorAction::DisconnectPeer { ref msg } => {
if let Some(mut descriptor) = peers.node_id_to_descriptor.remove(node_id) {
peers.peers_needing_send.remove(&descriptor);
if let Some(mut peer) = peers.peers.remove(&descriptor) {
if let Some(ref msg) = *msg {
log_trace!(self, "Handling DisconnectPeer HandleError event in peer_handler for node {} with message {}",
log_pubkey!(node_id),
msg.data);
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 17)));
self.do_attempt_write_data(&mut descriptor, &mut peer);
} else {
log_trace!(self, "Handling DisconnectPeer HandleError event in peer_handler for node {} with no message", log_pubkey!(node_id));
}
}
descriptor.disconnect_socket();
self.message_handler.chan_handler.peer_disconnected(&node_id, false);
}
},
msgs::ErrorAction::IgnoreError => {},
msgs::ErrorAction::SendErrorMessage { ref msg } => {
log_trace!(self, "Handling SendErrorMessage HandleError event in peer_handler for node {} with message {}",
log_pubkey!(node_id),
msg.data);
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 17)));
self.do_attempt_write_data(&mut descriptor, peer);
},
}
}
}
}
for mut descriptor in peers.peers_needing_send.drain() {
match peers.peers.get_mut(&descriptor) {
Some(peer) => self.do_attempt_write_data(&mut descriptor, peer),
None => panic!("Inconsistent peers set state!"),
}
}
}
}
pub fn disconnect_event(&self, descriptor: &Descriptor) {
self.disconnect_event_internal(descriptor, false);
}
fn disconnect_event_internal(&self, descriptor: &Descriptor, no_connection_possible: bool) {
let mut peers = self.peers.lock().unwrap();
peers.peers_needing_send.remove(descriptor);
let peer_option = peers.peers.remove(descriptor);
match peer_option {
None => panic!("Descriptor for disconnect_event is not already known to PeerManager"),
Some(peer) => {
match peer.their_node_id {
Some(node_id) => {
peers.node_id_to_descriptor.remove(&node_id);
self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
},
None => {}
}
}
};
}
}
#[cfg(test)]
mod tests {
use ln::peer_handler::{PeerManager, MessageHandler, SocketDescriptor};
use ln::msgs;
use util::events;
use util::test_utils;
use util::logger::Logger;
use secp256k1::Secp256k1;
use secp256k1::key::{SecretKey, PublicKey};
use rand::{thread_rng, Rng};
use std::sync::{Arc};
#[derive(PartialEq, Eq, Clone, Hash)]
struct FileDescriptor {
fd: u16,
}
impl SocketDescriptor for FileDescriptor {
fn send_data(&mut self, data: &[u8], _resume_read: bool) -> usize {
data.len()
}
fn disconnect_socket(&mut self) {}
}
fn create_network(peer_count: usize) -> Vec<PeerManager<FileDescriptor>> {
let mut peers = Vec::new();
let mut rng = thread_rng();
let logger : Arc<Logger> = Arc::new(test_utils::TestLogger::new());
let mut ephemeral_bytes = [0; 32];
rng.fill_bytes(&mut ephemeral_bytes);
for _ in 0..peer_count {
let chan_handler = test_utils::TestChannelMessageHandler::new();
let router = test_utils::TestRoutingMessageHandler::new();
let node_id = {
let mut key_slice = [0;32];
rng.fill_bytes(&mut key_slice);
SecretKey::from_slice(&key_slice).unwrap()
};
let msg_handler = MessageHandler { chan_handler: Arc::new(chan_handler), route_handler: Arc::new(router) };
let peer = PeerManager::new(msg_handler, node_id, &ephemeral_bytes, Arc::clone(&logger));
peers.push(peer);
}
peers
}
fn establish_connection(peer_a: &PeerManager<FileDescriptor>, peer_b: &PeerManager<FileDescriptor>) {
let secp_ctx = Secp256k1::new();
let their_id = PublicKey::from_secret_key(&secp_ctx, &peer_b.our_node_secret);
let fd = FileDescriptor { fd: 1};
peer_a.new_inbound_connection(fd.clone()).unwrap();
peer_a.peers.lock().unwrap().node_id_to_descriptor.insert(their_id, fd.clone());
}
#[test]
fn test_disconnect_peer() {
let mut peers = create_network(2);
establish_connection(&peers[0], &peers[1]);
assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 1);
let secp_ctx = Secp256k1::new();
let their_id = PublicKey::from_secret_key(&secp_ctx, &peers[1].our_node_secret);
let chan_handler = test_utils::TestChannelMessageHandler::new();
chan_handler.pending_events.lock().unwrap().push(events::MessageSendEvent::HandleError {
node_id: their_id,
action: msgs::ErrorAction::DisconnectPeer { msg: None },
});
assert_eq!(chan_handler.pending_events.lock().unwrap().len(), 1);
peers[0].message_handler.chan_handler = Arc::new(chan_handler);
peers[0].process_events();
assert_eq!(peers[0].peers.lock().unwrap().peers.len(), 0);
}
}