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crate::ix!();
impl PeerManager {
pub fn process_blocktxn_message(
self: Arc<Self>,
peer: &Option<Peer>,
msg_maker: &NetMsgMaker,
mut pfrom: &mut AmoWriteGuard<Box<dyn NodeInterface>>,
msg_type: &str,
recv: &mut DataStream,
time_received: &OffsetDateTime /* micros */,
interrupt_msg_proc: &AtomicBool) {
// Ignore blocktxn received while
// IMPORTING.load(atomic::Ordering::Relaxed)
if IMPORTING.load(atomic::Ordering::Relaxed) || REINDEX.load(atomic::Ordering::Relaxed) {
log_print!(
LogFlags::NET,
"Unexpected blocktxn message received from peer %d\n",
pfrom.get_id()
);
return;
}
let mut resp = BlockTransactions::default();
recv.stream_into(&mut resp);
let pblock: Amo::<Block> = amo_none();
let mut block_read: bool = false;
{
let mut guard = CS_MAIN.lock();
let inner = self.inner.lock();
let mut mbif = inner.map_blocks_in_flight.lock();
let mut found_unexpected_block_transaction = false;
//let mut it = mbif.get_mut(&resp.blockhash) ;
//HashMap<u256,(NodeId, QueuedBlockIter)>
if let Some((ref mut nodeid, ref mut queued_block_iter)) = mbif.get_mut(&resp.blockhash) {
if queued_block_iter.peek().unwrap().1.partial_block.is_some()
&& *nodeid == pfrom.get_id() {
let queued_block_value = queued_block_iter.peek_mut().unwrap();
let mut partial_block = queued_block_value.1.partial_block.get_mut();
let status: ReadStatus =
partial_block
.fill_block(&mut pblock.get_mut(), &resp.txn);
if status == ReadStatus::Invalid {
// Reset in-flight state in
// case Misbehaving does not
// result in a disconnect
self.remove_block_request(&resp.blockhash);
self.misbehaving(
pfrom.get_id(),
100,
"invalid compact block/non-matching block transactions"
);
return;
} else {
if status == ReadStatus::Failed {
// Might have collided,
// fall back to getdata
// now :(
let mut invs: Vec<Inv> = vec![];
invs.push(
Inv::new(
(GetDataMsg::MSG_BLOCK | get_fetch_flags(&***pfrom)).bits(),
&resp.blockhash
)
);
self.connman.get_mut().push_message(
&mut pfrom,
msg_maker.make(NetMsgType::GETDATA, &[&invs])
);
} else {
// Block is either okay, or
// possibly we received
//
// ReadStatus::CheckblockFailed.
//
// Note that CheckBlock can
// only fail for one of a few
// reasons:
//
// 1. bad-proof-of-work
// (impossible here,
// because we've already
// accepted the header)
//
// 2. merkleroot doesn't
// match the transactions
// given (already caught
// in FillBlock with
// ReadStatus::Failed, so
// impossible here)
//
// 3. the block is otherwise
// invalid (eg invalid
// coinbase, block is too
// big, too many legacy
// sigops, etc).
//
// So if CheckBlock failed,
// #3 is the only
// possibility.
//
// Under BIP 152, we don't
// discourage the peer unless
// proof of work is invalid
// (we don't require all the
// stateless checks to have
// been run). This is
// handled below, so just
// treat this as though the
// block was successfully
// read, and rely on the
// handling in
// ProcessNewBlock to ensure
// the block index is
// updated, etc.
self.remove_block_request(&resp.blockhash);
// it is now an empty pointer
block_read = true;
// mapBlockSource is used for
// potentially punishing peers
// and updating which peers
// send us compact blocks, so
// the race between here and
// CS_MAIN in ProcessNewBlock
// is fine. BIP 152 permits
// peers to relay compact
// blocks after validating the
// header only; we should not
// punish peers if the block
// turns out to be invalid.
self.inner.lock().map_block_source.insert(
resp.blockhash,
(pfrom.get_id(),false)
);
}
}
} else {
log_print!(
LogFlags::NET,
"Peer %d sent us block transactions for block we weren't expecting\n",
pfrom.get_id()
);
return;
}
} else {
log_print!(
LogFlags::NET,
"Peer %d sent us block transactions with unknown hash\n",
pfrom.get_id()
);
return;
}
}
// Don't hold CS_MAIN when we call
// into ProcessNewBlock
if block_read {
// Since we requested this block
// (it was in mapBlocksInFlight),
// force it to be processed, even
// if it would not be a candidate
// for new tip (missing previous
// block, chain not long enough,
// etc)
//
// This bypasses some anti-DoS
// logic in AcceptBlock (eg to
// prevent disk-space attacks),
// but this should be safe due to
// the protections in the compact
// block handler -- see related
// comment in compact block
// optimistic reconstruction
// handling.
self.process_block(pfrom,pblock.clone(),/*force_processing=*/ true);
}
}
}