openethereum/ethcore/sync/src/chain/handler.rs

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// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use api::WARP_SYNC_PROTOCOL_ID;
use block_sync::{BlockDownloaderImportError as DownloaderImportError, DownloadAction};
use bytes::Bytes;
use ethcore::client::{BlockStatus, BlockId, BlockImportError, BlockImportErrorKind};
use ethcore::error::*;
use ethcore::header::{BlockNumber, Header as BlockHeader};
use ethcore::snapshot::{ManifestData, RestorationStatus};
use ethereum_types::{H256, U256};
use hash::keccak;
use network::PeerId;
use rlp::Rlp;
use snapshot::ChunkType;
use std::cmp;
use std::collections::HashSet;
use std::time::Instant;
use sync_io::SyncIo;
use super::{
BlockSet,
ChainSync,
ForkConfirmation,
PacketDecodeError,
PeerAsking,
PeerInfo,
SyncRequester,
SyncState,
ETH_PROTOCOL_VERSION_62,
ETH_PROTOCOL_VERSION_63,
MAX_NEW_BLOCK_AGE,
MAX_NEW_HASHES,
PAR_PROTOCOL_VERSION_1,
PAR_PROTOCOL_VERSION_3,
BLOCK_BODIES_PACKET,
BLOCK_HEADERS_PACKET,
NEW_BLOCK_HASHES_PACKET,
NEW_BLOCK_PACKET,
PRIVATE_TRANSACTION_PACKET,
RECEIPTS_PACKET,
SIGNED_PRIVATE_TRANSACTION_PACKET,
SNAPSHOT_DATA_PACKET,
SNAPSHOT_MANIFEST_PACKET,
STATUS_PACKET,
TRANSACTIONS_PACKET,
};
/// The Chain Sync Handler: handles responses from peers
pub struct SyncHandler;
impl SyncHandler {
/// Handle incoming packet from peer
pub fn on_packet(sync: &mut ChainSync, io: &mut SyncIo, peer: PeerId, packet_id: u8, data: &[u8]) {
if packet_id != STATUS_PACKET && !sync.peers.contains_key(&peer) {
debug!(target:"sync", "Unexpected packet {} from unregistered peer: {}:{}", packet_id, peer, io.peer_info(peer));
return;
}
let rlp = Rlp::new(data);
let result = match packet_id {
STATUS_PACKET => SyncHandler::on_peer_status(sync, io, peer, &rlp),
TRANSACTIONS_PACKET => SyncHandler::on_peer_transactions(sync, io, peer, &rlp),
BLOCK_HEADERS_PACKET => SyncHandler::on_peer_block_headers(sync, io, peer, &rlp),
BLOCK_BODIES_PACKET => SyncHandler::on_peer_block_bodies(sync, io, peer, &rlp),
RECEIPTS_PACKET => SyncHandler::on_peer_block_receipts(sync, io, peer, &rlp),
NEW_BLOCK_PACKET => SyncHandler::on_peer_new_block(sync, io, peer, &rlp),
NEW_BLOCK_HASHES_PACKET => SyncHandler::on_peer_new_hashes(sync, io, peer, &rlp),
SNAPSHOT_MANIFEST_PACKET => SyncHandler::on_snapshot_manifest(sync, io, peer, &rlp),
SNAPSHOT_DATA_PACKET => SyncHandler::on_snapshot_data(sync, io, peer, &rlp),
PRIVATE_TRANSACTION_PACKET => SyncHandler::on_private_transaction(sync, io, peer, &rlp),
SIGNED_PRIVATE_TRANSACTION_PACKET => SyncHandler::on_signed_private_transaction(sync, io, peer, &rlp),
_ => {
debug!(target: "sync", "{}: Unknown packet {}", peer, packet_id);
Ok(())
}
};
result.unwrap_or_else(|e| {
debug!(target:"sync", "{} -> Malformed packet {} : {}", peer, packet_id, e);
})
}
/// Called when peer sends us new consensus packet
pub fn on_consensus_packet(io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
trace!(target: "sync", "Received consensus packet from {:?}", peer_id);
io.chain().queue_consensus_message(r.as_raw().to_vec());
Ok(())
}
/// Called by peer when it is disconnecting
pub fn on_peer_aborting(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId) {
trace!(target: "sync", "== Disconnecting {}: {}", peer_id, io.peer_info(peer_id));
sync.handshaking_peers.remove(&peer_id);
if sync.peers.contains_key(&peer_id) {
debug!(target: "sync", "Disconnected {}", peer_id);
sync.clear_peer_download(peer_id);
sync.peers.remove(&peer_id);
sync.active_peers.remove(&peer_id);
if sync.state == SyncState::SnapshotManifest {
// Check if we are asking other peers for
// the snapshot manifest as well.
// If not, return to initial state
let still_asking_manifest = sync.peers.iter()
.filter(|&(id, p)| sync.active_peers.contains(id) && p.asking == PeerAsking::SnapshotManifest)
.next().is_none();
if still_asking_manifest {
sync.state = ChainSync::get_init_state(sync.warp_sync, io.chain());
}
}
sync.continue_sync(io);
}
}
/// Called when a new peer is connected
pub fn on_peer_connected(sync: &mut ChainSync, io: &mut SyncIo, peer: PeerId) {
trace!(target: "sync", "== Connected {}: {}", peer, io.peer_info(peer));
if let Err(e) = sync.send_status(io, peer) {
debug!(target:"sync", "Error sending status request: {:?}", e);
io.disconnect_peer(peer);
} else {
sync.handshaking_peers.insert(peer, Instant::now());
}
}
/// Called by peer once it has new block bodies
pub fn on_peer_new_block(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
if !sync.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring new block from unconfirmed peer {}", peer_id);
return Ok(());
}
let difficulty: U256 = r.val_at(1)?;
if let Some(ref mut peer) = sync.peers.get_mut(&peer_id) {
if peer.difficulty.map_or(true, |pd| difficulty > pd) {
peer.difficulty = Some(difficulty);
}
}
let block_rlp = r.at(0)?;
let header_rlp = block_rlp.at(0)?;
let h = keccak(&header_rlp.as_raw());
trace!(target: "sync", "{} -> NewBlock ({})", peer_id, h);
let header: BlockHeader = header_rlp.as_val()?;
if header.number() > sync.highest_block.unwrap_or(0) {
sync.highest_block = Some(header.number());
}
let mut unknown = false;
{
if let Some(ref mut peer) = sync.peers.get_mut(&peer_id) {
peer.latest_hash = header.hash();
}
}
let last_imported_number = sync.new_blocks.last_imported_block_number();
if last_imported_number > header.number() && last_imported_number - 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(BlockImportErrorKind::Import(ImportErrorKind::AlreadyInChain), _)) => {
trace!(target: "sync", "New block already in chain {:?}", h);
},
Err(BlockImportError(BlockImportErrorKind::Import(ImportErrorKind::AlreadyQueued), _)) => {
trace!(target: "sync", "New block already queued {:?}", h);
},
Ok(_) => {
// abort current download of the same block
sync.complete_sync(io);
sync.new_blocks.mark_as_known(&header.hash(), header.number());
trace!(target: "sync", "New block queued {:?} ({})", h, header.number());
},
Err(BlockImportError(BlockImportErrorKind::Block(BlockError::UnknownParent(p)), _)) => {
unknown = true;
trace!(target: "sync", "New block with unknown parent ({:?}) {:?}", p, h);
},
Err(e) => {
debug!(target: "sync", "Bad new block {:?} : {:?}", h, e);
io.disable_peer(peer_id);
}
};
if unknown {
if sync.state != SyncState::Idle {
trace!(target: "sync", "NewBlock ignored while seeking");
} else {
trace!(target: "sync", "New unknown block {:?}", h);
//TODO: handle too many unknown blocks
sync.sync_peer(io, peer_id, true);
}
}
sync.continue_sync(io);
Ok(())
}
/// Handles `NewHashes` packet. Initiates headers download for any unknown hashes.
pub fn on_peer_new_hashes(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
if !sync.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring new hashes from unconfirmed peer {}", peer_id);
return Ok(());
}
let hashes: Vec<_> = r.iter().take(MAX_NEW_HASHES).map(|item| (item.val_at::<H256>(0), item.val_at::<BlockNumber>(1))).collect();
if let Some(ref mut peer) = sync.peers.get_mut(&peer_id) {
// Peer has new blocks with unknown difficulty
peer.difficulty = None;
if let Some(&(Ok(ref h), _)) = hashes.last() {
peer.latest_hash = h.clone();
}
}
if sync.state != SyncState::Idle {
trace!(target: "sync", "Ignoring new hashes since we're already downloading.");
let max = r.iter().take(MAX_NEW_HASHES).map(|item| item.val_at::<BlockNumber>(1).unwrap_or(0)).fold(0u64, cmp::max);
if max > sync.highest_block.unwrap_or(0) {
sync.highest_block = Some(max);
}
sync.continue_sync(io);
return Ok(());
}
trace!(target: "sync", "{} -> NewHashes ({} entries)", peer_id, r.item_count()?);
let mut max_height: BlockNumber = 0;
let mut new_hashes = Vec::new();
let last_imported_number = sync.new_blocks.last_imported_block_number();
for (rh, rn) in hashes {
let hash = rh?;
let number = rn?;
if number > sync.highest_block.unwrap_or(0) {
sync.highest_block = Some(number);
}
if sync.new_blocks.is_downloading(&hash) {
continue;
}
if last_imported_number > number && last_imported_number - 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 {:?}", hash);
},
BlockStatus::Queued => {
trace!(target: "sync", "New hash block already queued {:?}", hash);
},
BlockStatus::Unknown | BlockStatus::Pending => {
new_hashes.push(hash.clone());
if number > max_height {
trace!(target: "sync", "New unknown block hash {:?}", hash);
if let Some(ref mut peer) = sync.peers.get_mut(&peer_id) {
peer.latest_hash = hash.clone();
}
max_height = number;
}
},
BlockStatus::Bad => {
debug!(target: "sync", "Bad new block hash {:?}", hash);
io.disable_peer(peer_id);
return Ok(());
}
}
};
if max_height != 0 {
trace!(target: "sync", "Downloading blocks for new hashes");
sync.new_blocks.reset_to(new_hashes);
sync.state = SyncState::NewBlocks;
sync.sync_peer(io, peer_id, true);
}
sync.continue_sync(io);
Ok(())
}
/// Called by peer once it has new block bodies
fn on_peer_block_bodies(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
sync.clear_peer_download(peer_id);
let block_set = sync.peers.get(&peer_id).and_then(|p| p.block_set).unwrap_or(BlockSet::NewBlocks);
if !sync.reset_peer_asking(peer_id, PeerAsking::BlockBodies) {
trace!(target: "sync", "{}: Ignored unexpected bodies", peer_id);
sync.continue_sync(io);
return Ok(());
}
let item_count = r.item_count()?;
trace!(target: "sync", "{} -> BlockBodies ({} entries), set = {:?}", peer_id, item_count, block_set);
if item_count == 0 {
sync.deactivate_peer(io, peer_id);
}
else if sync.state == SyncState::Waiting {
trace!(target: "sync", "Ignored block bodies while waiting");
}
else
{
let result = {
let downloader = match block_set {
BlockSet::NewBlocks => &mut sync.new_blocks,
BlockSet::OldBlocks => match sync.old_blocks {
None => {
trace!(target: "sync", "Ignored block headers while block download is inactive");
sync.continue_sync(io);
return Ok(());
},
Some(ref mut blocks) => blocks,
}
};
downloader.import_bodies(io, r)
};
match result {
Err(DownloaderImportError::Invalid) => {
io.disable_peer(peer_id);
sync.deactivate_peer(io, peer_id);
sync.continue_sync(io);
return Ok(());
},
Err(DownloaderImportError::Useless) => {
sync.deactivate_peer(io, peer_id);
},
Ok(()) => (),
}
sync.collect_blocks(io, block_set);
sync.sync_peer(io, peer_id, false);
}
sync.continue_sync(io);
Ok(())
}
fn on_peer_confirmed(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId) {
{
let peer = sync.peers.get_mut(&peer_id).expect("Is only called when peer is present in peers");
peer.confirmation = ForkConfirmation::Confirmed;
}
sync.sync_peer(io, peer_id, false);
}
fn on_peer_fork_header(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
{
let peer = sync.peers.get_mut(&peer_id).expect("Is only called when peer is present in peers");
peer.asking = PeerAsking::Nothing;
let item_count = r.item_count()?;
let (fork_number, fork_hash) = sync.fork_block.expect("ForkHeader request is sent only fork block is Some; qed").clone();
if item_count == 0 || item_count != 1 {
trace!(target: "sync", "{}: Chain is too short to confirm the block", peer_id);
io.disable_peer(peer_id);
return Ok(());
}
let header = r.at(0)?.as_raw();
if keccak(&header) != fork_hash {
trace!(target: "sync", "{}: Fork mismatch", peer_id);
io.disable_peer(peer_id);
return Ok(());
}
trace!(target: "sync", "{}: Confirmed peer", peer_id);
if !io.chain_overlay().read().contains_key(&fork_number) {
trace!(target: "sync", "Inserting (fork) block {} header", fork_number);
io.chain_overlay().write().insert(fork_number, header.to_vec());
}
}
SyncHandler::on_peer_confirmed(sync, io, peer_id);
return Ok(());
}
/// Called by peer once it has new block headers during sync
fn on_peer_block_headers(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
let is_fork_header_request = match sync.peers.get(&peer_id) {
Some(peer) if peer.asking == PeerAsking::ForkHeader => true,
_ => false,
};
if is_fork_header_request {
return SyncHandler::on_peer_fork_header(sync, io, peer_id, r);
}
sync.clear_peer_download(peer_id);
let expected_hash = sync.peers.get(&peer_id).and_then(|p| p.asking_hash);
let allowed = sync.peers.get(&peer_id).map(|p| p.is_allowed()).unwrap_or(false);
let block_set = sync.peers.get(&peer_id).and_then(|p| p.block_set).unwrap_or(BlockSet::NewBlocks);
if !sync.reset_peer_asking(peer_id, PeerAsking::BlockHeaders) || expected_hash.is_none() || !allowed {
trace!(target: "sync", "{}: Ignored unexpected headers, expected_hash = {:?}", peer_id, expected_hash);
sync.continue_sync(io);
return Ok(());
}
let item_count = r.item_count()?;
trace!(target: "sync", "{} -> BlockHeaders ({} entries), state = {:?}, set = {:?}", peer_id, item_count, sync.state, block_set);
if (sync.state == SyncState::Idle || sync.state == SyncState::WaitingPeers) && sync.old_blocks.is_none() {
trace!(target: "sync", "Ignored unexpected block headers");
sync.continue_sync(io);
return Ok(());
}
if sync.state == SyncState::Waiting {
trace!(target: "sync", "Ignored block headers while waiting");
sync.continue_sync(io);
return Ok(());
}
let result = {
let downloader = match block_set {
BlockSet::NewBlocks => &mut sync.new_blocks,
BlockSet::OldBlocks => {
match sync.old_blocks {
None => {
trace!(target: "sync", "Ignored block headers while block download is inactive");
sync.continue_sync(io);
return Ok(());
},
Some(ref mut blocks) => blocks,
}
}
};
downloader.import_headers(io, r, expected_hash)
};
match result {
Err(DownloaderImportError::Useless) => {
sync.deactivate_peer(io, peer_id);
},
Err(DownloaderImportError::Invalid) => {
io.disable_peer(peer_id);
sync.deactivate_peer(io, peer_id);
sync.continue_sync(io);
return Ok(());
},
Ok(DownloadAction::Reset) => {
// mark all outstanding requests as expired
trace!("Resetting downloads for {:?}", block_set);
for (_, ref mut p) in sync.peers.iter_mut().filter(|&(_, ref p)| p.block_set == Some(block_set)) {
p.reset_asking();
}
}
Ok(DownloadAction::None) => {},
}
sync.collect_blocks(io, block_set);
// give a task to the same peer first if received valuable headers.
sync.sync_peer(io, peer_id, false);
// give tasks to other peers
sync.continue_sync(io);
Ok(())
}
/// Called by peer once it has new block receipts
fn on_peer_block_receipts(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
sync.clear_peer_download(peer_id);
let block_set = sync.peers.get(&peer_id).and_then(|p| p.block_set).unwrap_or(BlockSet::NewBlocks);
if !sync.reset_peer_asking(peer_id, PeerAsking::BlockReceipts) {
trace!(target: "sync", "{}: Ignored unexpected receipts", peer_id);
sync.continue_sync(io);
return Ok(());
}
let item_count = r.item_count()?;
trace!(target: "sync", "{} -> BlockReceipts ({} entries)", peer_id, item_count);
if item_count == 0 {
sync.deactivate_peer(io, peer_id);
}
else if sync.state == SyncState::Waiting {
trace!(target: "sync", "Ignored block receipts while waiting");
}
else
{
let result = {
let downloader = match block_set {
BlockSet::NewBlocks => &mut sync.new_blocks,
BlockSet::OldBlocks => match sync.old_blocks {
None => {
trace!(target: "sync", "Ignored block headers while block download is inactive");
sync.continue_sync(io);
return Ok(());
},
Some(ref mut blocks) => blocks,
}
};
downloader.import_receipts(io, r)
};
match result {
Err(DownloaderImportError::Invalid) => {
io.disable_peer(peer_id);
sync.deactivate_peer(io, peer_id);
sync.continue_sync(io);
return Ok(());
},
Err(DownloaderImportError::Useless) => {
sync.deactivate_peer(io, peer_id);
},
Ok(()) => (),
}
sync.collect_blocks(io, block_set);
sync.sync_peer(io, peer_id, false);
}
sync.continue_sync(io);
Ok(())
}
/// Called when snapshot manifest is downloaded from a peer.
fn on_snapshot_manifest(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
if !sync.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring snapshot manifest from unconfirmed peer {}", peer_id);
return Ok(());
}
sync.clear_peer_download(peer_id);
if !sync.reset_peer_asking(peer_id, PeerAsking::SnapshotManifest) || sync.state != SyncState::SnapshotManifest {
trace!(target: "sync", "{}: Ignored unexpected/expired manifest", peer_id);
sync.continue_sync(io);
return Ok(());
}
let manifest_rlp = r.at(0)?;
let manifest = match ManifestData::from_rlp(manifest_rlp.as_raw()) {
Err(e) => {
trace!(target: "sync", "{}: Ignored bad manifest: {:?}", peer_id, e);
io.disable_peer(peer_id);
sync.continue_sync(io);
return Ok(());
}
Ok(manifest) => manifest,
};
let is_supported_version = io.snapshot_service().supported_versions()
.map_or(false, |(l, h)| manifest.version >= l && manifest.version <= h);
if !is_supported_version {
trace!(target: "sync", "{}: Snapshot manifest version not supported: {}", peer_id, manifest.version);
io.disable_peer(peer_id);
sync.continue_sync(io);
return Ok(());
}
sync.snapshot.reset_to(&manifest, &keccak(manifest_rlp.as_raw()));
io.snapshot_service().begin_restore(manifest);
sync.state = SyncState::SnapshotData;
// give a task to the same peer first.
sync.sync_peer(io, peer_id, false);
// give tasks to other peers
sync.continue_sync(io);
Ok(())
}
/// Called when snapshot data is downloaded from a peer.
fn on_snapshot_data(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
if !sync.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "Ignoring snapshot data from unconfirmed peer {}", peer_id);
return Ok(());
}
sync.clear_peer_download(peer_id);
if !sync.reset_peer_asking(peer_id, PeerAsking::SnapshotData) || (sync.state != SyncState::SnapshotData && sync.state != SyncState::SnapshotWaiting) {
trace!(target: "sync", "{}: Ignored unexpected snapshot data", peer_id);
sync.continue_sync(io);
return Ok(());
}
// check service status
let status = io.snapshot_service().status();
match status {
RestorationStatus::Inactive | RestorationStatus::Failed => {
trace!(target: "sync", "{}: Snapshot restoration aborted", peer_id);
sync.state = SyncState::WaitingPeers;
// only note bad if restoration failed.
if let (Some(hash), RestorationStatus::Failed) = (sync.snapshot.snapshot_hash(), status) {
trace!(target: "sync", "Noting snapshot hash {} as bad", hash);
sync.snapshot.note_bad(hash);
}
sync.snapshot.clear();
sync.continue_sync(io);
return Ok(());
},
RestorationStatus::Initializing { .. } => {
trace!(target: "warp", "{}: Snapshot restoration is initializing", peer_id);
return Ok(());
}
RestorationStatus::Ongoing { .. } => {
trace!(target: "sync", "{}: Snapshot restoration is ongoing", peer_id);
},
}
let snapshot_data: Bytes = r.val_at(0)?;
match sync.snapshot.validate_chunk(&snapshot_data) {
Ok(ChunkType::Block(hash)) => {
trace!(target: "sync", "{}: Processing block chunk", peer_id);
io.snapshot_service().restore_block_chunk(hash, snapshot_data);
}
Ok(ChunkType::State(hash)) => {
trace!(target: "sync", "{}: Processing state chunk", peer_id);
io.snapshot_service().restore_state_chunk(hash, snapshot_data);
}
Err(()) => {
trace!(target: "sync", "{}: Got bad snapshot chunk", peer_id);
io.disconnect_peer(peer_id);
sync.continue_sync(io);
return Ok(());
}
}
if sync.snapshot.is_complete() {
// wait for snapshot restoration process to complete
sync.state = SyncState::SnapshotWaiting;
}
// give a task to the same peer first.
sync.sync_peer(io, peer_id, false);
// give tasks to other peers
sync.continue_sync(io);
Ok(())
}
/// Called by peer to report status
fn on_peer_status(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
sync.handshaking_peers.remove(&peer_id);
let protocol_version: u8 = r.val_at(0)?;
let warp_protocol = io.protocol_version(&WARP_SYNC_PROTOCOL_ID, peer_id) != 0;
let peer = PeerInfo {
protocol_version: protocol_version,
network_id: r.val_at(1)?,
difficulty: Some(r.val_at(2)?),
latest_hash: r.val_at(3)?,
genesis: r.val_at(4)?,
asking: PeerAsking::Nothing,
asking_blocks: Vec::new(),
asking_hash: None,
ask_time: Instant::now(),
last_sent_transactions: HashSet::new(),
expired: false,
confirmation: if sync.fork_block.is_none() { ForkConfirmation::Confirmed } else { ForkConfirmation::Unconfirmed },
asking_snapshot_data: None,
snapshot_hash: if warp_protocol { Some(r.val_at(5)?) } else { None },
snapshot_number: if warp_protocol { Some(r.val_at(6)?) } else { None },
block_set: None,
};
trace!(target: "sync", "New peer {} (protocol: {}, network: {:?}, difficulty: {:?}, latest:{}, genesis:{}, snapshot:{:?})",
peer_id, peer.protocol_version, peer.network_id, peer.difficulty, peer.latest_hash, peer.genesis, peer.snapshot_number);
if io.is_expired() {
trace!(target: "sync", "Status packet from expired session {}:{}", peer_id, io.peer_info(peer_id));
return Ok(());
}
if sync.peers.contains_key(&peer_id) {
debug!(target: "sync", "Unexpected status packet from {}:{}", peer_id, io.peer_info(peer_id));
return Ok(());
}
let chain_info = io.chain().chain_info();
if peer.genesis != chain_info.genesis_hash {
io.disable_peer(peer_id);
trace!(target: "sync", "Peer {} genesis hash mismatch (ours: {}, theirs: {})", peer_id, chain_info.genesis_hash, peer.genesis);
return Ok(());
}
if peer.network_id != sync.network_id {
io.disable_peer(peer_id);
trace!(target: "sync", "Peer {} network id mismatch (ours: {}, theirs: {})", peer_id, sync.network_id, peer.network_id);
return Ok(());
}
if false
|| (warp_protocol && (peer.protocol_version < PAR_PROTOCOL_VERSION_1.0 || peer.protocol_version > PAR_PROTOCOL_VERSION_3.0))
|| (!warp_protocol && (peer.protocol_version < ETH_PROTOCOL_VERSION_62.0 || peer.protocol_version > ETH_PROTOCOL_VERSION_63.0))
{
io.disable_peer(peer_id);
trace!(target: "sync", "Peer {} unsupported eth protocol ({})", peer_id, peer.protocol_version);
return Ok(());
}
if sync.sync_start_time.is_none() {
sync.sync_start_time = Some(Instant::now());
}
sync.peers.insert(peer_id.clone(), peer);
// Don't activate peer immediatelly when searching for common block.
// Let the current sync round complete first.
sync.active_peers.insert(peer_id.clone());
debug!(target: "sync", "Connected {}:{}", peer_id, io.peer_info(peer_id));
match sync.fork_block {
Some((fork_block, _)) => {
SyncRequester::request_fork_header(sync, io, peer_id, fork_block);
},
_ => {
SyncHandler::on_peer_confirmed(sync, io, peer_id);
}
}
Ok(())
}
/// Called when peer sends us new transactions
fn on_peer_transactions(sync: &mut ChainSync, io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
// Accept transactions only when fully synced
if !io.is_chain_queue_empty() || (sync.state != SyncState::Idle && sync.state != SyncState::NewBlocks) {
trace!(target: "sync", "{} Ignoring transactions while syncing", peer_id);
return Ok(());
}
if !sync.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "{} Ignoring transactions from unconfirmed/unknown peer", peer_id);
return Ok(());
}
let item_count = r.item_count()?;
trace!(target: "sync", "{:02} -> Transactions ({} entries)", peer_id, item_count);
let mut transactions = Vec::with_capacity(item_count);
for i in 0 .. item_count {
let rlp = r.at(i)?;
let tx = rlp.as_raw().to_vec();
transactions.push(tx);
}
io.chain().queue_transactions(transactions, peer_id);
Ok(())
}
/// Called when peer sends us signed private transaction packet
fn on_signed_private_transaction(sync: &ChainSync, _io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
if !sync.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "{} Ignoring packet from unconfirmed/unknown peer", peer_id);
return Ok(());
}
trace!(target: "sync", "Received signed private transaction packet from {:?}", peer_id);
if let Err(e) = sync.private_tx_handler.import_signed_private_transaction(r.as_raw()) {
trace!(target: "sync", "Ignoring the message, error queueing: {}", e);
}
Ok(())
}
/// Called when peer sends us new private transaction packet
fn on_private_transaction(sync: &ChainSync, _io: &mut SyncIo, peer_id: PeerId, r: &Rlp) -> Result<(), PacketDecodeError> {
if !sync.peers.get(&peer_id).map_or(false, |p| p.can_sync()) {
trace!(target: "sync", "{} Ignoring packet from unconfirmed/unknown peer", peer_id);
return Ok(());
}
trace!(target: "sync", "Received private transaction packet from {:?}", peer_id);
if let Err(e) = sync.private_tx_handler.import_private_transaction(r.as_raw()) {
trace!(target: "sync", "Ignoring the message, error queueing: {}", e);
}
Ok(())
}
}
#[cfg(test)]
mod tests {
use ethcore::client::{ChainInfo, EachBlockWith, TestBlockChainClient};
use parking_lot::RwLock;
use rlp::{Rlp};
use std::collections::{VecDeque};
use tests::helpers::{TestIo};
use tests::snapshot::TestSnapshotService;
use super::*;
use super::super::tests::{
dummy_sync_with_peer,
get_dummy_block,
get_dummy_blocks,
get_dummy_hashes,
};
#[test]
fn handles_peer_new_hashes() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
let queue = RwLock::new(VecDeque::new());
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &queue, None);
let hashes_data = get_dummy_hashes();
let hashes_rlp = Rlp::new(&hashes_data);
let result = SyncHandler::on_peer_new_hashes(&mut sync, &mut io, 0, &hashes_rlp);
assert!(result.is_ok());
}
#[test]
fn handles_peer_new_block_malformed() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
let block_data = get_dummy_block(11, client.chain_info().best_block_hash);
let queue = RwLock::new(VecDeque::new());
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
//sync.have_common_block = true;
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &queue, None);
let block = Rlp::new(&block_data);
let result = SyncHandler::on_peer_new_block(&mut sync, &mut io, 0, &block);
assert!(result.is_err());
}
#[test]
fn handles_peer_new_block() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
let block_data = get_dummy_blocks(11, client.chain_info().best_block_hash);
let queue = RwLock::new(VecDeque::new());
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &queue, None);
let block = Rlp::new(&block_data);
let result = SyncHandler::on_peer_new_block(&mut sync, &mut io, 0, &block);
assert!(result.is_ok());
}
#[test]
fn handles_peer_new_block_empty() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
let queue = RwLock::new(VecDeque::new());
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &queue, None);
let empty_data = vec![];
let block = Rlp::new(&empty_data);
let result = SyncHandler::on_peer_new_block(&mut sync, &mut io, 0, &block);
assert!(result.is_err());
}
#[test]
fn handles_peer_new_hashes_empty() {
let mut client = TestBlockChainClient::new();
client.add_blocks(10, EachBlockWith::Uncle);
let queue = RwLock::new(VecDeque::new());
let mut sync = dummy_sync_with_peer(client.block_hash_delta_minus(5), &client);
let ss = TestSnapshotService::new();
let mut io = TestIo::new(&mut client, &ss, &queue, None);
let empty_hashes_data = vec![];
let hashes_rlp = Rlp::new(&empty_hashes_data);
let result = SyncHandler::on_peer_new_hashes(&mut sync, &mut io, 0, &hashes_rlp);
assert!(result.is_ok());
}
}