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Prevent syncing to ancient blocks (#1693)

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* Don't try to sync to ancient blocks

* Fixed test
This commit is contained in:
Arkadiy Paronyan
2016-07-23 17:27:23 +02:00
committed by Gav Wood
parent 9a8fdeead9
commit 247495fba2
4 changed files with 57 additions and 23 deletions
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67
sync/src/chain.rs
View File

@@ -119,6 +119,7 @@ const SUBCHAIN_SIZE: usize = 64;
const MAX_ROUND_PARENTS: usize = 32;
const MAX_NEW_HASHES: usize = 64;
const MAX_TX_TO_IMPORT: usize = 512;
const MAX_NEW_BLOCK_AGE: BlockNumber = 20;
const STATUS_PACKET: u8 = 0x00;
const NEW_BLOCK_HASHES_PACKET: u8 = 0x01;
@@ -134,7 +135,8 @@ const NODE_DATA_PACKET: u8 = 0x0e;
const GET_RECEIPTS_PACKET: u8 = 0x0f;
const RECEIPTS_PACKET: u8 = 0x10;
const CONNECTION_TIMEOUT_SEC: f64 = 15f64;
const HEADERS_TIMEOUT_SEC: f64 = 15f64;
const BODIES_TIMEOUT_SEC: f64 = 5f64;
#[derive(Copy, Clone, Eq, PartialEq, Debug)]
/// Sync state
@@ -217,6 +219,8 @@ struct PeerInfo {
asking_hash: Option<H256>,
/// Request timestamp
ask_time: f64,
/// Pending request is expird and result should be ignored
expired: bool,
}
/// Blockchain sync handler.
@@ -311,6 +315,10 @@ impl ChainSync {
for (_, ref mut p) in &mut self.peers {
p.asking_blocks.clear();
p.asking_hash = None;
// mark any pending requests as expired
if p.asking != PeerAsking::Nothing {
p.expired = true;
}
}
self.syncing_difficulty = From::from(0u64);
self.state = SyncState::Idle;
@@ -361,6 +369,7 @@ impl ChainSync {
asking_blocks: Vec::new(),
asking_hash: None,
ask_time: 0f64,
expired: false,
};
trace!(target: "sync", "New peer {} (protocol: {}, network: {:?}, difficulty: {:?}, latest:{}, genesis:{})", peer_id, peer.protocol_version, peer.network_id, peer.difficulty, peer.latest_hash, peer.genesis);
@@ -496,6 +505,9 @@ impl ChainSync {
}
self.collect_blocks(io);
// give a task to the same peer first if received valuable headers.
self.sync_peer(io, peer_id, false);
// give tasks to other peers
self.continue_sync(io);
Ok(())
}
@@ -548,6 +560,11 @@ impl ChainSync {
peer.latest_hash = header.hash();
peer.latest_number = Some(header.number());
}
if self.last_imported_block > header.number() && self.last_imported_block - header.number() > MAX_NEW_BLOCK_AGE {
trace!(target: "sync", "Ignored ancient new block {:?}", h);
io.disable_peer(peer_id);
return Ok(());
}
match io.chain().import_block(block_rlp.as_raw().to_vec()) {
Err(BlockImportError::Import(ImportError::AlreadyInChain)) => {
trace!(target: "sync", "New block already in chain {:?}", h);
@@ -605,34 +622,39 @@ impl ChainSync {
let hashes = r.iter().take(MAX_NEW_HASHES).map(|item| (item.val_at::<H256>(0), item.val_at::<BlockNumber>(1)));
let mut max_height: BlockNumber = 0;
let mut new_hashes = Vec::new();
for (rh, rd) in hashes {
let h = try!(rh);
let d = try!(rd);
if d > self.highest_block.unwrap_or(0) {
self.highest_block = Some(d);
for (rh, rn) in hashes {
let hash = try!(rh);
let number = try!(rn);
if number > self.highest_block.unwrap_or(0) {
self.highest_block = Some(number);
}
if self.blocks.is_downloading(&h) {
if self.blocks.is_downloading(&hash) {
continue;
}
match io.chain().block_status(BlockID::Hash(h.clone())) {
if self.last_imported_block > number && self.last_imported_block - number > MAX_NEW_BLOCK_AGE {
trace!(target: "sync", "Ignored ancient new block hash {:?}", hash);
io.disable_peer(peer_id);
continue;
}
match io.chain().block_status(BlockID::Hash(hash.clone())) {
BlockStatus::InChain => {
trace!(target: "sync", "New block hash already in chain {:?}", h);
trace!(target: "sync", "New block hash already in chain {:?}", hash);
},
BlockStatus::Queued => {
trace!(target: "sync", "New hash block already queued {:?}", h);
trace!(target: "sync", "New hash block already queued {:?}", hash);
},
BlockStatus::Unknown => {
new_hashes.push(h.clone());
if d > max_height {
trace!(target: "sync", "New unknown block hash {:?}", h);
new_hashes.push(hash.clone());
if number > max_height {
trace!(target: "sync", "New unknown block hash {:?}", hash);
let peer = self.peers.get_mut(&peer_id).unwrap();
peer.latest_hash = h.clone();
peer.latest_number = Some(d);
max_height = d;
peer.latest_hash = hash.clone();
peer.latest_number = Some(number);
max_height = number;
}
},
BlockStatus::Bad => {
debug!(target: "sync", "Bad new block hash {:?}", h);
debug!(target: "sync", "Bad new block hash {:?}", hash);
io.disable_peer(peer_id);
return Ok(());
}
@@ -678,7 +700,7 @@ impl ChainSync {
self.sync_peer(io, p, false);
}
}
if self.state != SyncState::Waiting && !self.peers.values().any(|p| p.asking != PeerAsking::Nothing) {
if self.state != SyncState::Waiting && !self.peers.values().any(|p| p.asking != PeerAsking::Nothing && !p.expired) {
self.complete_sync();
}
}
@@ -913,6 +935,7 @@ impl ChainSync {
/// Reset peer status after request is complete.
fn reset_peer_asking(&mut self, peer_id: PeerId, asking: PeerAsking) -> bool {
let peer = self.peers.get_mut(&peer_id).unwrap();
peer.expired = false;
if peer.asking != asking {
trace!(target:"sync", "Asking {:?} while expected {:?}", peer.asking, asking);
peer.asking = PeerAsking::Nothing;
@@ -1183,7 +1206,12 @@ impl ChainSync {
let tick = time::precise_time_s();
let mut aborting = Vec::new();
for (peer_id, peer) in &self.peers {
if peer.asking != PeerAsking::Nothing && (tick - peer.ask_time) > CONNECTION_TIMEOUT_SEC {
let timeout = match peer.asking {
PeerAsking::BlockHeaders | PeerAsking::Heads => (tick - peer.ask_time) > HEADERS_TIMEOUT_SEC,
PeerAsking::BlockBodies => (tick - peer.ask_time) > BODIES_TIMEOUT_SEC,
PeerAsking::Nothing => false,
};
if timeout {
trace!(target:"sync", "Timeout {}", peer_id);
io.disconnect_peer(*peer_id);
aborting.push(*peer_id);
@@ -1598,6 +1626,7 @@ mod tests {
asking_blocks: Vec::new(),
asking_hash: None,
ask_time: 0f64,
expired: false,
});
sync
}

2
sync/src/tests/chain.rs
View File

@@ -108,7 +108,7 @@ fn restart() {
net.restart_peer(0);
let status = net.peer(0).sync.read().status();
assert_eq!(status.state, SyncState::ChainHead);
assert_eq!(status.state, SyncState::Idle);
}
#[test]