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Rlp error handling

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This commit is contained in:
arkpar 2016-01-08 17:52:25 +01:00
parent 9ea7f14542
commit b272595183
1 changed files with 83 additions and 60 deletions
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137
src/sync/chain.rs
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@ -5,11 +5,13 @@ use util::network::{PeerId, PacketId};
use util::hash::{H256, FixedHash};
use util::bytes::{Bytes};
use util::uint::{U256};
use util::rlp::{Rlp, RlpStream, self}; //TODO: use UntrustedRlp
use util::rlp::{Rlp, UntrustedRlp, RlpStream, self};
use util::rlp::rlptraits::{Stream, View};
use util::rlp::rlperrors::DecoderError;
use util::sha3::Hashable;
use client::{BlockNumber, BlockChainClient, BlockStatus, QueueStatus, ImportResult};
use views::{HeaderView};
use header::{Header as BlockHeader};
use sync::range_collection::{RangeCollection, ToUsize, FromUsize};
use sync::{SyncIo};
@ -25,6 +27,8 @@ impl FromUsize for BlockNumber {
}
}
type PacketDecodeError = DecoderError;
const PROTOCOL_VERSION: u8 = 63u8;
const MAX_BODIES_TO_SEND: usize = 256;
const MAX_HEADERS_TO_SEND: usize = 512;
@ -206,13 +210,13 @@ impl ChainSync {
}
/// Called by peer to report status
fn on_peer_status(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &Rlp) {
fn on_peer_status(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
let peer = PeerInfo {
protocol_version: r.val_at(0),
network_id: r.val_at(1),
difficulty: r.val_at(2),
latest: r.val_at(3),
genesis: r.val_at(4),
protocol_version: try!(r.val_at(0)),
network_id: try!(r.val_at(1)),
difficulty: try!(r.val_at(2)),
latest: try!(r.val_at(3)),
genesis: try!(r.val_at(4)),
asking: PeerAsking::Nothing,
asking_blocks: Vec::new(),
};
@ -224,26 +228,27 @@ impl ChainSync {
panic!("ChainSync: new peer already exists");
}
self.sync_peer(io, peer_id, false);
Ok(())
}
/// Called by peer once it has new block headers during sync
fn on_peer_block_headers(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &Rlp) {
fn on_peer_block_headers(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
self.reset_peer_asking(peer_id, PeerAsking::BlockHeaders);
let item_count = r.item_count();
trace!(target: "sync", "{} -> BlockHeaders ({} entries)", peer_id, item_count);
self.clear_peer_download(peer_id);
if self.state != SyncState::Blocks && self.state != SyncState::NewBlocks && self.state != SyncState::Waiting {
trace!(target: "sync", "Ignored unexpected block headers");
return;
return Ok(());
}
if self.state == SyncState::Waiting {
trace!(target: "sync", "Ignored block headers while waiting");
return;
return Ok(());
}
for i in 0..item_count {
let info = HeaderView::new_from_rlp(r.at(i));
let number = BlockNumber::from(info.number());
let info: BlockHeader = try!(r.val_at(i));
let number = BlockNumber::from(info.number);
if number <= self.last_imported_block || self.headers.have_item(&number) {
trace!(target: "sync", "Skipping existing block header");
continue;
@ -251,7 +256,7 @@ impl ChainSync {
if number > self.highest_block {
self.highest_block = number;
}
let hash = info.sha3();
let hash = info.hash();
match io.chain().block_status(&hash) {
BlockStatus::InChain => {
self.have_common_block = true;
@ -262,12 +267,12 @@ impl ChainSync {
_ => {
if self.have_common_block {
//validate chain
if self.have_common_block && number == self.last_imported_block + 1 && info.parent_hash() != self.last_imported_hash {
if self.have_common_block && number == self.last_imported_block + 1 && info.parent_hash != self.last_imported_hash {
// TODO: lower peer rating
debug!(target: "sync", "Mismatched block header {} {}", number, hash);
continue;
}
if self.headers.find_item(&(number - 1)).map_or(false, |p| p.hash != info.parent_hash()) {
if self.headers.find_item(&(number - 1)).map_or(false, |p| p.hash != info.parent_hash) {
// mismatching parent id, delete the previous block and don't add this one
// TODO: lower peer rating
debug!(target: "sync", "Mismatched block header {} {}", number, hash);
@ -281,14 +286,14 @@ impl ChainSync {
}
}
let hdr = Header {
data: r.at(i).as_raw().to_vec(),
data: try!(r.at(i)).as_raw().to_vec(),
hash: hash.clone(),
parent: info.parent_hash(),
parent: info.parent_hash,
};
self.headers.insert_item(number, hdr);
let header_id = HeaderId {
transactions_root: info.transactions_root(),
uncles: info.uncles_hash()
transactions_root: info.transactions_root,
uncles: info.uncles_hash
};
trace!(target: "sync", "Got header {} ({})", number, hash);
if header_id.transactions_root == rlp::SHA3_NULL_RLP && header_id.uncles == rlp::SHA3_EMPTY_LIST_RLP {
@ -306,27 +311,29 @@ impl ChainSync {
}
self.collect_blocks(io);
self.continue_sync(io);
Ok(())
}
/// Called by peer once it has new block bodies
fn on_peer_block_bodies(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &Rlp) {
fn on_peer_block_bodies(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
use util::triehash::ordered_trie_root;
self.reset_peer_asking(peer_id, PeerAsking::BlockBodies);
let item_count = r.item_count();
trace!(target: "sync", "{} -> BlockBodies ({} entries)", peer_id, item_count);
self.clear_peer_download(peer_id);
if self.state != SyncState::Blocks && self.state != SyncState::NewBlocks && self.state != SyncState::Waiting {
trace!(target: "sync", "Ignored unexpected block bodies");
return;
return Ok(());
}
if self.state == SyncState::Waiting {
trace!(target: "sync", "Ignored block bodies while waiting");
return;
return Ok(());
}
for i in 0..item_count {
let body: Rlp = r.at(i);
let tx = body.at(0);
let tx_root = ::util::triehash::ordered_trie_root(tx.iter().map(|r| r.as_raw().to_vec()).collect()); //TODO: get rid of vectors here
let uncles = body.at(1).as_raw().sha3();
let body = try!(r.at(i));
let tx = try!(body.at(0));
let tx_root = ordered_trie_root(tx.iter().map(|r| r.as_raw().to_vec()).collect()); //TODO: get rid of vectors here
let uncles = try!(body.at(1)).as_raw().sha3();
let header_id = HeaderId {
transactions_root: tx_root,
uncles: uncles
@ -344,12 +351,13 @@ impl ChainSync {
}
self.collect_blocks(io);
self.continue_sync(io);
Ok(())
}
/// Called by peer once it has new block bodies
fn on_peer_new_block(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &Rlp) {
let block_rlp = r.at(0);
let header_rlp = block_rlp.at(0);
fn on_peer_new_block(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
let block_rlp = try!(r.at(0));
let header_rlp = try!(block_rlp.at(0));
let h = header_rlp.as_raw().sha3();
trace!(target: "sync", "{} -> NewBlock ({})", peer_id, h);
@ -366,7 +374,7 @@ impl ChainSync {
ImportResult::Queued(QueueStatus::Unknown) => {
trace!(target: "sync", "New block unknown {:?}", h);
//TODO: handle too many unknown blocks
let difficulty: U256 = r.val_at(1);
let difficulty: U256 = try!(r.val_at(1));
let peer_difficulty = self.peers.get_mut(&peer_id).expect("ChainSync: unknown peer").difficulty;
if difficulty > peer_difficulty {
trace!(target: "sync", "Received block {:?} with no known parent. Peer needs syncing...", h);
@ -377,18 +385,21 @@ impl ChainSync {
debug!(target: "sync", "Bad new block {:?}", h);
io.disable_peer(peer_id);
}
}
};
Ok(())
}
fn on_peer_new_hashes(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &Rlp) {
fn on_peer_new_hashes(&mut self, io: &mut SyncIo, peer_id: &PeerId, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
if self.peers.get_mut(&peer_id).expect("ChainSync: unknown peer").asking != PeerAsking::Nothing {
trace!(target: "sync", "Ignoring new hashes since we're already downloading.");
return;
return Ok(());
}
trace!(target: "sync", "{} -> NewHashes ({} entries)", peer_id, r.item_count());
let hashes = r.iter().map(|item| (item.val_at::<H256>(0), item.val_at::<U256>(1)));
let mut max_height: U256 = From::from(0);
for (h, d) in hashes {
for (rh, rd) in hashes {
let h = try!(rh);
let d = try!(rd);
match io.chain().block_status(&h) {
BlockStatus::InChain => {
trace!(target: "sync", "New block hash already in chain {:?}", h);
@ -407,10 +418,11 @@ impl ChainSync {
BlockStatus::Bad =>{
debug!(target: "sync", "Bad new block hash {:?}", h);
io.disable_peer(peer_id);
return;
}
return Ok(());
}
}
};
Ok(())
}
/// Called by peer when it is disconnecting
@ -714,7 +726,8 @@ impl ChainSync {
}
}
fn on_peer_transactions(&mut self, _io: &mut SyncIo, _peer_id: &PeerId, _r: &Rlp) {
fn on_peer_transactions(&mut self, _io: &mut SyncIo, _peer_id: &PeerId, _r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
Ok(())
}
fn send_status(&mut self, io: &mut SyncIo, peer_id: &PeerId) {
@ -735,16 +748,16 @@ impl ChainSync {
}
}
fn return_block_headers(&self, io: &mut SyncIo, r: &Rlp) {
fn return_block_headers(&self, io: &mut SyncIo, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
// Packet layout:
// [ block: { P , B_32 }, maxHeaders: P, skip: P, reverse: P in { 0 , 1 } ]
let max_headers: usize = r.val_at(1);
let skip: usize = r.val_at(2);
let reverse: bool = r.val_at(3);
let max_headers: usize = try!(r.val_at(1));
let skip: usize = try!(r.val_at(2));
let reverse: bool = try!(r.val_at(3));
let last = io.chain().chain_info().best_block_number;
let mut number = if r.at(0).size() == 32 {
let mut number = if try!(r.at(0)).size() == 32 {
// id is a hash
let hash: H256 = r.val_at(0);
let hash: H256 = try!(r.val_at(0));
trace!(target: "sync", "-> GetBlockHeaders (hash: {}, max: {}, skip: {}, reverse:{})", hash, max_headers, skip, reverse);
match io.chain().block_header(&hash) {
Some(hdr) => From::from(HeaderView::new(&hdr).number()),
@ -752,8 +765,8 @@ impl ChainSync {
}
}
else {
trace!(target: "sync", "-> GetBlockHeaders (number: {}, max: {}, skip: {}, reverse:{})", r.val_at::<BlockNumber>(0), max_headers, skip, reverse);
r.val_at(0)
trace!(target: "sync", "-> GetBlockHeaders (number: {}, max: {}, skip: {}, reverse:{})", try!(r.val_at::<BlockNumber>(0)), max_headers, skip, reverse);
try!(r.val_at(0))
};
if reverse {
@ -788,20 +801,21 @@ impl ChainSync {
io.respond(BLOCK_HEADERS_PACKET, rlp.out()).unwrap_or_else(|e|
debug!(target: "sync", "Error sending headers: {:?}", e));
trace!(target: "sync", "-> GetBlockHeaders: returned {} entries", count);
Ok(())
}
fn return_block_bodies(&self, io: &mut SyncIo, r: &Rlp) {
fn return_block_bodies(&self, io: &mut SyncIo, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
let mut count = r.item_count();
if count == 0 {
debug!(target: "sync", "Empty GetBlockBodies request, ignoring.");
return;
return Ok(());
}
trace!(target: "sync", "-> GetBlockBodies: {} entries", count);
count = min(count, MAX_BODIES_TO_SEND);
let mut added = 0usize;
let mut data = Bytes::new();
for i in 0..count {
match io.chain().block_body(&r.val_at::<H256>(i)) {
match io.chain().block_body(&try!(r.val_at::<H256>(i))) {
Some(mut hdr) => {
data.append(&mut hdr);
added += 1;
@ -814,19 +828,20 @@ impl ChainSync {
io.respond(BLOCK_BODIES_PACKET, rlp.out()).unwrap_or_else(|e|
debug!(target: "sync", "Error sending headers: {:?}", e));
trace!(target: "sync", "-> GetBlockBodies: returned {} entries", added);
Ok(())
}
fn return_node_data(&self, io: &mut SyncIo, r: &Rlp) {
fn return_node_data(&self, io: &mut SyncIo, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
let mut count = r.item_count();
if count == 0 {
debug!(target: "sync", "Empty GetNodeData request, ignoring.");
return;
return Ok(());
}
count = min(count, MAX_NODE_DATA_TO_SEND);
let mut added = 0usize;
let mut data = Bytes::new();
for i in 0..count {
match io.chain().state_data(&r.val_at::<H256>(i)) {
match io.chain().state_data(&try!(r.val_at::<H256>(i))) {
Some(mut hdr) => {
data.append(&mut hdr);
added += 1;
@ -838,19 +853,20 @@ impl ChainSync {
rlp.append_raw(&data, added);
io.respond(NODE_DATA_PACKET, rlp.out()).unwrap_or_else(|e|
debug!(target: "sync", "Error sending headers: {:?}", e));
Ok(())
}
fn return_receipts(&self, io: &mut SyncIo, r: &Rlp) {
fn return_receipts(&self, io: &mut SyncIo, r: &UntrustedRlp) -> Result<(), PacketDecodeError> {
let mut count = r.item_count();
if count == 0 {
debug!(target: "sync", "Empty GetReceipts request, ignoring.");
return;
return Ok(());
}
count = min(count, MAX_RECEIPTS_TO_SEND);
let mut added = 0usize;
let mut data = Bytes::new();
for i in 0..count {
match io.chain().block_receipts(&r.val_at::<H256>(i)) {
match io.chain().block_receipts(&try!(r.val_at::<H256>(i))) {
Some(mut hdr) => {
data.append(&mut hdr);
added += 1;
@ -862,11 +878,12 @@ impl ChainSync {
rlp.append_raw(&data, added);
io.respond(RECEIPTS_PACKET, rlp.out()).unwrap_or_else(|e|
debug!(target: "sync", "Error sending headers: {:?}", e));
Ok(())
}
pub fn on_packet(&mut self, io: &mut SyncIo, peer: &PeerId, packet_id: u8, data: &[u8]) {
let rlp = Rlp::new(data);
match packet_id {
let rlp = UntrustedRlp::new(data);
let result = match packet_id {
STATUS_PACKET => self.on_peer_status(io, peer, &rlp),
TRANSACTIONS_PACKET => self.on_peer_transactions(io, peer, &rlp),
GET_BLOCK_HEADERS_PACKET => self.return_block_headers(io, &rlp),
@ -877,8 +894,14 @@ impl ChainSync {
NEW_BLOCK_HASHES_PACKET => self.on_peer_new_hashes(io, peer, &rlp),
GET_NODE_DATA_PACKET => self.return_node_data(io, &rlp),
GET_RECEIPTS_PACKET => self.return_receipts(io, &rlp),
_ => debug!(target: "sync", "Unknown packet {}", packet_id)
_ => {
debug!(target: "sync", "Unknown packet {}", packet_id);
Ok(())
}
};
result.unwrap_or_else(|e| {
debug!(target:"sync", "{} -> Malformed packet {} : {}", peer, packet_id, e);
})
}
pub fn maintain_sync(&mut self, _io: &mut SyncIo) {