// You may not use this file except in accordance with one or both of these
// licenses.
-//! The top-level network map tracking logic lives here.
+//! The [`NetworkGraph`] stores the network gossip and [`P2PGossipSync`] fetches it from peers
use bitcoin::secp256k1::constants::PUBLIC_KEY_SIZE;
use bitcoin::secp256k1::PublicKey;
use bitcoin::hashes::sha256d::Hash as Sha256dHash;
use bitcoin::hashes::Hash;
-use bitcoin::blockdata::transaction::TxOut;
use bitcoin::hash_types::BlockHash;
-use crate::ln::chan_utils::make_funding_redeemscript_from_slices;
use crate::ln::features::{ChannelFeatures, NodeFeatures, InitFeatures};
use crate::ln::msgs::{DecodeError, ErrorAction, Init, LightningError, RoutingMessageHandler, NetAddress, MAX_VALUE_MSAT};
use crate::ln::msgs::{ChannelAnnouncement, ChannelUpdate, NodeAnnouncement, GossipTimestampFilter};
use crate::ln::msgs::{QueryChannelRange, ReplyChannelRange, QueryShortChannelIds, ReplyShortChannelIdsEnd};
use crate::ln::msgs;
-use crate::routing::utxo::{UtxoLookup, UtxoLookupError};
+use crate::routing::utxo::{self, UtxoLookup};
use crate::util::ser::{Readable, ReadableArgs, Writeable, Writer, MaybeReadable};
use crate::util::logger::{Logger, Level};
use crate::util::events::{MessageSendEvent, MessageSendEventsProvider};
use core::sync::atomic::{AtomicUsize, Ordering};
use crate::sync::Mutex;
use core::ops::{Bound, Deref};
-use bitcoin::hashes::hex::ToHex;
#[cfg(feature = "std")]
use std::time::{SystemTime, UNIX_EPOCH};
/// resync them from gossip. Each `NodeId` is mapped to the time (in seconds) it was removed so
/// that once some time passes, we can potentially resync it from gossip again.
removed_nodes: Mutex<HashMap<NodeId, Option<u64>>>,
+ /// Announcement messages which are awaiting an on-chain lookup to be processed.
+ pub(super) pending_checks: utxo::PendingChecks,
}
/// A read-only view of [`NetworkGraph`].
false
}
}
+
+ /// Used to broadcast forward gossip messages which were validated async.
+ ///
+ /// Note that this will ignore events other than `Broadcast*` or messages with too much excess
+ /// data.
+ pub(super) fn forward_gossip_msg(&self, mut ev: MessageSendEvent) {
+ match &mut ev {
+ MessageSendEvent::BroadcastChannelAnnouncement { msg, ref mut update_msg } => {
+ if msg.contents.excess_data.len() > MAX_EXCESS_BYTES_FOR_RELAY { return; }
+ if update_msg.as_ref()
+ .map(|msg| msg.contents.excess_data.len()).unwrap_or(0) > MAX_EXCESS_BYTES_FOR_RELAY
+ {
+ *update_msg = None;
+ }
+ },
+ MessageSendEvent::BroadcastChannelUpdate { msg } => {
+ if msg.contents.excess_data.len() > MAX_EXCESS_BYTES_FOR_RELAY { return; }
+ },
+ MessageSendEvent::BroadcastNodeAnnouncement { msg } => {
+ if msg.contents.excess_data.len() > MAX_EXCESS_BYTES_FOR_RELAY ||
+ msg.contents.excess_address_data.len() > MAX_EXCESS_BYTES_FOR_RELAY ||
+ msg.contents.excess_data.len() + msg.contents.excess_address_data.len() > MAX_EXCESS_BYTES_FOR_RELAY
+ {
+ return;
+ }
+ },
+ _ => return,
+ }
+ self.pending_events.lock().unwrap().push(ev);
+ }
}
impl<L: Deref> NetworkGraph<L> where L::Target: Logger {
features.set_gossip_queries_optional();
features
}
+
+ fn processing_queue_high(&self) -> bool {
+ self.network_graph.pending_checks.too_many_checks_pending()
+ }
}
impl<G: Deref<Target=NetworkGraph<L>>, U: Deref, L: Deref> MessageSendEventsProvider for P2PGossipSync<G, U, L>
last_rapid_gossip_sync_timestamp: Mutex::new(last_rapid_gossip_sync_timestamp),
removed_nodes: Mutex::new(HashMap::new()),
removed_channels: Mutex::new(HashMap::new()),
+ pending_checks: utxo::PendingChecks::new(),
})
}
}
last_rapid_gossip_sync_timestamp: Mutex::new(None),
removed_channels: Mutex::new(HashMap::new()),
removed_nodes: Mutex::new(HashMap::new()),
+ pending_checks: utxo::PendingChecks::new(),
}
}
}
fn update_node_from_announcement_intern(&self, msg: &msgs::UnsignedNodeAnnouncement, full_msg: Option<&msgs::NodeAnnouncement>) -> Result<(), LightningError> {
- match self.nodes.write().unwrap().get_mut(&msg.node_id) {
- None => Err(LightningError{err: "No existing channels for node_announcement".to_owned(), action: ErrorAction::IgnoreError}),
+ let mut nodes = self.nodes.write().unwrap();
+ match nodes.get_mut(&msg.node_id) {
+ None => {
+ core::mem::drop(nodes);
+ self.pending_checks.check_hold_pending_node_announcement(msg, full_msg)?;
+ Err(LightningError{err: "No existing channels for node_announcement".to_owned(), action: ErrorAction::IgnoreError})
+ },
Some(node) => {
if let Some(node_info) = node.announcement_info.as_ref() {
// The timestamp field is somewhat of a misnomer - the BOLTs use it to order
}
}
- let utxo_value = match &utxo_lookup {
- &None => {
- // Tentatively accept, potentially exposing us to DoS attacks
- None
- },
- &Some(ref utxo_lookup) => {
- match utxo_lookup.get_utxo(&msg.chain_hash, msg.short_channel_id) {
- Ok(TxOut { value, script_pubkey }) => {
- let expected_script =
- make_funding_redeemscript_from_slices(msg.bitcoin_key_1.as_slice(), msg.bitcoin_key_2.as_slice()).to_v0_p2wsh();
- if script_pubkey != expected_script {
- return Err(LightningError{err: format!("Channel announcement key ({}) didn't match on-chain script ({})", expected_script.to_hex(), script_pubkey.to_hex()), action: ErrorAction::IgnoreError});
- }
- //TODO: Check if value is worth storing, use it to inform routing, and compare it
- //to the new HTLC max field in channel_update
- Some(value)
- },
- Err(UtxoLookupError::UnknownChain) => {
- return Err(LightningError{err: format!("Channel announced on an unknown chain ({})", msg.chain_hash.encode().to_hex()), action: ErrorAction::IgnoreError});
- },
- Err(UtxoLookupError::UnknownTx) => {
- return Err(LightningError{err: "Channel announced without corresponding UTXO entry".to_owned(), action: ErrorAction::IgnoreError});
- },
- }
- },
- };
+ let utxo_value = self.pending_checks.check_channel_announcement(
+ utxo_lookup, msg, full_msg)?;
#[allow(unused_mut, unused_assignments)]
let mut announcement_received_time = 0;
let mut channels = self.channels.write().unwrap();
match channels.get_mut(&msg.short_channel_id) {
- None => return Err(LightningError{err: "Couldn't find channel for update".to_owned(), action: ErrorAction::IgnoreError}),
+ None => {
+ core::mem::drop(channels);
+ self.pending_checks.check_hold_pending_channel_update(msg, full_msg)?;
+ return Err(LightningError{err: "Couldn't find channel for update".to_owned(), action: ErrorAction::IgnoreError});
+ },
Some(channel) => {
if msg.htlc_maximum_msat > MAX_VALUE_MSAT {
return Err(LightningError{err:
projects / rust-lightning / blobdiff