use std::collections::{HashMap,LinkedList};
use std::sync::{Arc, Mutex};
-use std::{cmp,mem,hash,fmt};
+use std::{cmp,error,mem,hash,fmt};
pub struct MessageHandler {
pub chan_handler: Arc<msgs::ChannelMessageHandler>,
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"
+ }
+}
struct Peer {
channel_encryptor: PeerChannelEncryptor,
match self.do_read_event(peer_descriptor, data) {
Ok(res) => Ok(res),
Err(e) => {
- self.disconnect_event(peer_descriptor);
+ self.disconnect_event_internal(peer_descriptor, e.no_connection_possible);
Err(e)
}
}
assert!(peer.pending_read_buffer.len() > 0);
assert!(peer.pending_read_buffer.len() > peer.pending_read_buffer_pos);
- macro_rules! try_potential_handleerror {
- ($thing: expr) => {
- match $thing {
- Ok(x) => x,
- Err(_e) => {
- //TODO: Handle e appropriately!
- return Err(PeerHandleError{});
- }
- };
- }
- }
-
- macro_rules! try_potential_decodeerror {
- ($thing: expr) => {
- match $thing {
- Ok(x) => x,
- Err(_e) => {
- //TODO: Handle e?
- return Err(PeerHandleError{});
- }
- };
- }
- }
-
- macro_rules! encode_and_send_msg {
- ($msg: expr, $msg_code: expr) => {
- peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
- }
- }
-
let mut insert_node_id = None;
-
let mut read_pos = 0;
while read_pos < data.len() {
{
read_pos += data_to_copy;
peer.pending_read_buffer_pos += data_to_copy;
}
+
if peer.pending_read_buffer_pos == peer.pending_read_buffer.len() {
+ peer.pending_read_buffer_pos = 0;
+
+ macro_rules! encode_and_send_msg {
+ ($msg: expr, $msg_code: expr) => {
+ peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!($msg, $msg_code)[..]));
+ }
+ }
+
+ macro_rules! try_potential_handleerror {
+ ($thing: expr) => {
+ match $thing {
+ Ok(x) => x,
+ Err(e) => {
+ println!("Got error handling message: {}!", e.err);
+ if let Some(action) = e.msg {
+ match action {
+ msgs::ErrorAction::UpdateFailHTLC { msg } => {
+ encode_and_send_msg!(msg, 131);
+ continue;
+ },
+ msgs::ErrorAction::DisconnectPeer => {
+ return Err(PeerHandleError{ no_connection_possible: false });
+ },
+ msgs::ErrorAction::IgnoreError => {
+ continue;
+ },
+ }
+ } else {
+ return Err(PeerHandleError{ no_connection_possible: false });
+ }
+ }
+ };
+ }
+ }
+
+ macro_rules! try_potential_decodeerror {
+ ($thing: expr) => {
+ match $thing {
+ Ok(x) => x,
+ Err(_e) => {
+ println!("Error decoding message");
+ //TODO: Handle e?
+ return Err(PeerHandleError{ no_connection_possible: false });
+ }
+ };
+ }
+ }
+
+ macro_rules! try_ignore_potential_decodeerror {
+ ($thing: expr) => {
+ match $thing {
+ Ok(x) => x,
+ Err(_e) => {
+ println!("Error decoding message, ignoring due to lnd spec incompatibility. See https://github.com/lightningnetwork/lnd/issues/1407");
+ continue;
+ }
+ };
+ }
+ }
+
let next_step = peer.channel_encryptor.get_noise_step();
match next_step {
NextNoiseStep::ActOne => {
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 { // Need at least the message type tag
- return Err(PeerHandleError{});
+ 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);
+ // Reset read buffer
+ 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]);
if msg_type != 16 && peer.their_global_features.is_none() {
// Need an init message as first message
- return Err(PeerHandleError{});
+ return Err(PeerHandleError{ no_connection_possible: false });
}
match msg_type {
// Connection control:
16 => {
let msg = try_potential_decodeerror!(msgs::Init::decode(&msg_data[2..]));
if msg.global_features.requires_unknown_bits() {
- return Err(PeerHandleError{});
+ return Err(PeerHandleError{ no_connection_possible: true });
}
if msg.local_features.requires_unknown_bits() {
- return Err(PeerHandleError{});
+ return Err(PeerHandleError{ no_connection_possible: true });
}
peer.their_global_features = Some(msg.global_features);
peer.their_local_features = Some(msg.local_features);
17 => {
// Error msg
},
- 18 => { }, // ping
- 19 => { }, // pong
+
+ 18 => {
+ let msg = try_potential_decodeerror!(msgs::Ping::decode(&msg_data[2..]));
+ let resp = msgs::Pong { byteslen: msg.ponglen };
+ encode_and_send_msg!(resp, 19);
+ },
+ 19 => {
+ try_potential_decodeerror!(msgs::Pong::decode(&msg_data[2..]));
+ },
// Channel control:
32 => {
},
131 => {
let msg = try_potential_decodeerror!(msgs::UpdateFailHTLC::decode(&msg_data[2..]));
- try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg));
+ let chan_update = try_potential_handleerror!(self.message_handler.chan_handler.handle_update_fail_htlc(&peer.their_node_id.unwrap(), &msg));
+ if let Some(update) = chan_update {
+ self.message_handler.route_handler.handle_htlc_fail_channel_update(&update);
+ }
},
135 => {
let msg = try_potential_decodeerror!(msgs::UpdateFailMalformedHTLC::decode(&msg_data[2..]));
132 => {
let msg = try_potential_decodeerror!(msgs::CommitmentSigned::decode(&msg_data[2..]));
- let resp = try_potential_handleerror!(self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg));
- encode_and_send_msg!(resp, 133);
+ let resps = try_potential_handleerror!(self.message_handler.chan_handler.handle_commitment_signed(&peer.their_node_id.unwrap(), &msg));
+ encode_and_send_msg!(resps.0, 133);
+ if let Some(resp) = resps.1 {
+ encode_and_send_msg!(resp, 132);
+ }
},
133 => {
let msg = try_potential_decodeerror!(msgs::RevokeAndACK::decode(&msg_data[2..]));
let resp_option = try_potential_handleerror!(self.message_handler.chan_handler.handle_revoke_and_ack(&peer.their_node_id.unwrap(), &msg));
match resp_option {
Some(resps) => {
- for resp in resps.0 {
+ for resp in resps.update_add_htlcs {
encode_and_send_msg!(resp, 128);
}
- encode_and_send_msg!(resps.1, 132);
+ for resp in resps.update_fulfill_htlcs {
+ encode_and_send_msg!(resp, 130);
+ }
+ for resp in resps.update_fail_htlcs {
+ encode_and_send_msg!(resp, 131);
+ }
+ encode_and_send_msg!(resps.commitment_signed, 132);
},
None => {},
}
}
},
257 => {
- let msg = try_potential_decodeerror!(msgs::NodeAnnouncement::decode(&msg_data[2..]));
+ let msg = try_ignore_potential_decodeerror!(msgs::NodeAnnouncement::decode(&msg_data[2..]));
try_potential_handleerror!(self.message_handler.route_handler.handle_node_announcement(&msg));
},
258 => {
},
_ => {
if (msg_type & 1) == 0 {
- //TODO: Fail all channels. Kill the peer!
- return Err(PeerHandleError{});
+ return Err(PeerHandleError{ no_connection_possible: true });
}
},
}
-
- peer.pending_read_buffer = [0; 18].to_vec();
- peer.pending_read_is_header = true;
}
}
}
- peer.pending_read_buffer_pos = 0;
}
}
Self::do_attempt_write_data(&mut descriptor, peer);
continue;
},
- Event::SendFulfillHTLC { ref node_id, ref msg } => {
+ Event::SendFulfillHTLC { ref node_id, ref msg, ref commitment_msg } => {
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
//TODO: Do whatever we're gonna do for handling dropped messages
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 130)));
+ peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(commitment_msg, 132)));
Self::do_attempt_write_data(&mut descriptor, peer);
continue;
},
- Event::SendFailHTLC { ref node_id, ref msg } => {
+ Event::SendFailHTLC { ref node_id, ref msg, ref commitment_msg } => {
let (mut descriptor, peer) = get_peer_for_forwarding!(node_id, {
//TODO: Do whatever we're gonna do for handling dropped messages
});
peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(msg, 131)));
+ peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encode_msg!(commitment_msg, 132)));
Self::do_attempt_write_data(&mut descriptor, peer);
continue;
},
Event::BroadcastChannelAnnouncement { ref msg, ref update_msg } => {
- let encoded_msg = encode_msg!(msg, 256);
- let encoded_update_msg = encode_msg!(update_msg, 258);
+ 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() {
- 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
+ for (ref descriptor, ref mut peer) in peers.peers.iter_mut() {
+ if !peer.channel_encryptor.is_ready_for_encryption() {
+ 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);
+ }
+ }
+ continue;
+ },
+ Event::BroadcastChannelUpdate { ref msg } => {
+ 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() {
+ continue
+ }
+ peer.pending_outbound_buffer.push_back(peer.channel_encryptor.encrypt_message(&encoded_msg[..]));
+ Self::do_attempt_write_data(&mut (*descriptor).clone(), peer);
}
- 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);
}
continue;
},
/// but must NOT be called if a PeerHandleError was provided out of a new_*_connection event!
/// Panics if the descriptor was not previously registered in a successful new_*_connection event.
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();
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); },
+ Some(node_id) => {
+ peers.node_id_to_descriptor.remove(&node_id);
+ self.message_handler.chan_handler.peer_disconnected(&node_id, no_connection_possible);
+ },
None => {}
}
- //TODO: Notify the chan_handler that this node disconnected, and do something about
- //handling response messages that were queued for sending (maybe the send buffer
- //needs to be unencrypted?)
}
};
}
projects / rust-lightning / blobdiff