Remove incoming queue. Put things straight into actual queues.

Make state items more fitting.

libethereum/BlockQueue.cpp

@@ -29,7 +29,7 @@ using namespace std;
 using namespace dev;
 using namespace dev::eth;
 
-bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
+ImportResult BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 {
 	// Check if we already know this block.
 	h256 h = BlockInfo::headerHash(_block);
@@ -42,7 +42,7 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 	{
 		// Already know about this one.
 		cblockq << "Already known.";
-		return false;
+		return ImportResult::AlreadyKnown;
 	}
 
 	// VERIFY: populates from the block and checks the block is internally coherent.
@@ -59,7 +59,7 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 	catch (Exception const& _e)
 	{
 		cwarn << "Ignoring malformed block: " << _e.description();
-		return false;
+		return ImportResult::Malformed;
 	}
 #endif
 
@@ -67,7 +67,7 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 	if (_bc.details(h))
 	{
 		cblockq << "Already known in chain.";
-		return false;
+		return ImportResult::AlreadyInChain;
 	}
 
 	UpgradeGuard ul(l);
@@ -77,6 +77,7 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 	{
 		m_future.insert(make_pair((unsigned)bi.timestamp, _block.toBytes()));
 		cblockq << "OK - queued for future.";
+		return ImportResult::FutureTime;
 	}
 	else
 	{
@@ -87,6 +88,8 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 			cblockq << "OK - queued as unknown parent:" << bi.parentHash.abridged();
 			m_unknown.insert(make_pair(bi.parentHash, make_pair(h, _block.toBytes())));
 			m_unknownSet.insert(h);
+
+			return ImportResult::UnknownParent;
 		}
 		else
 		{
@@ -96,10 +99,9 @@ bool BlockQueue::import(bytesConstRef _block, BlockChain const& _bc)
 			m_readySet.insert(h);
 
 			noteReadyWithoutWriteGuard(h);
+			return ImportResult::Success;
 		}
 	}
-
-	return true;
 }
 
 void BlockQueue::tick(BlockChain const& _bc)

libethereum/BlockQueue.h

@@ -37,6 +37,16 @@ class BlockChain;
 struct BlockQueueChannel: public LogChannel { static const char* name() { return "[]Q"; } static const int verbosity = 4; };
 #define cblockq dev::LogOutputStream<dev::eth::BlockQueueChannel, true>()
 
+enum class ImportResult
+{
+	Success = 0,
+	UnknownParent,
+	FutureTime,
+	AlreadyInChain,
+	AlreadyKnown,
+	Malformed
+};
+
 /**
  * @brief A queue of blocks. Sits between network or other I/O and the BlockChain.
  * Sorts them ready for blockchain insertion (with the BlockChain::sync() method).
@@ -46,7 +56,7 @@ class BlockQueue
 {
 public:
 	/// Import a block into the queue.
-	bool import(bytesConstRef _tx, BlockChain const& _bc);
+	ImportResult import(bytesConstRef _tx, BlockChain const& _bc);
 
 	/// Notes that time has moved on and some blocks that used to be "in the future" may no be valid.
 	void tick(BlockChain const& _bc);
@@ -67,6 +77,9 @@ public:
 	/// Clear everything.
 	void clear() { WriteGuard l(m_lock); m_readySet.clear(); m_drainingSet.clear(); m_ready.clear(); m_unknownSet.clear(); m_unknown.clear(); m_future.clear(); }
 
+	/// Return first block with an unknown parent.
+	h256 firstUnknown() const { ReadGuard l(m_lock); return m_unknownSet.size() ? *m_unknownSet.begin() : h256(); }
+
 private:
 	void noteReadyWithoutWriteGuard(h256 _b);
 	void notePresentWithoutWriteGuard(bytesConstRef _block);
@@ -77,7 +90,7 @@ private:
 	std::vector<bytes> m_ready;								///< List of blocks, in correct order, ready for chain-import.
 	std::set<h256> m_unknownSet;							///< Set of all blocks whose parents are not ready/in-chain.
 	std::multimap<h256, std::pair<h256, bytes>> m_unknown;	///< For transactions that have an unknown parent; we map their parent hash to the block stuff, and insert once the block appears.
-	std::multimap<unsigned, bytes> m_future;	///< Set of blocks that are not yet valid.
+	std::multimap<unsigned, bytes> m_future;				///< Set of blocks that are not yet valid.
 };
 
 }

libethereum/CommonNet.h

@@ -65,10 +65,16 @@ enum class Grabbing
 {
 	State,
 	Hashes,
-	Chain,
-	ChainHelper,
+	Blocks,
 	Nothing
 };
 
+enum class Syncing
+{
+	Waiting,
+	Executing,
+	Done
+};
+
 }
 }

libethereum/EthereumHost.cpp

@@ -70,9 +70,9 @@ bool EthereumHost::ensureInitialised(TransactionQueue& _tq)
 	return false;
 }
 
-void EthereumHost::noteHavePeerState(EthereumPeer* _who)
+void EthereumHost::notePeerStateChanged(EthereumPeer* _who)
 {
-	clog(NetAllDetail) << "Have peer state.";
+	clog(NetAllDetail) << "Peer state changed.";
 
 	// TODO: FIX: BUG: Better state management!
 
@@ -80,7 +80,7 @@ void EthereumHost::noteHavePeerState(EthereumPeer* _who)
 	if (m_grabbing != Grabbing::Nothing)
 	{
 		for (auto const& i: peers())
-			if (i->cap<EthereumPeer>()->m_grabbing == m_grabbing || m_grabbing == Grabbing::State)
+			if (i->cap<EthereumPeer>()->m_grabbing == m_grabbing || m_grabbing == Grabbing::Presync)
 			{
 				clog(NetAllDetail) << "Already downloading chain. Just set to help out.";
 				_who->ensureGettingChain();
@@ -205,9 +205,7 @@ void EthereumHost::maintainTransactions(TransactionQueue& _tq, h256 _currentHash
 
 	// Send any new transactions.
 	for (auto const& p: peers())
-	{
-		auto ep = p->cap<EthereumPeer>();
-		if (ep)
+		if (auto ep = p->cap<EthereumPeer>())
 		{
 			bytes b;
 			unsigned n = 0;
@@ -231,7 +229,6 @@ void EthereumHost::maintainTransactions(TransactionQueue& _tq, h256 _currentHash
 			}
 			ep->m_requireTransactions = false;
 		}
-	}
 }
 
 void EthereumHost::reset()
@@ -249,36 +246,20 @@ void EthereumHost::reset()
 
 void EthereumHost::maintainBlocks(BlockQueue& _bq, h256 _currentHash)
 {
-	// Import new blocks
-	{
-		lock_guard<recursive_mutex> l(m_incomingLock);
-		for (auto it = m_incomingBlocks.rbegin(); it != m_incomingBlocks.rend(); ++it)
-			if (_bq.import(&*it, m_chain))
-			{}
-			else{} // TODO: don't forward it.
-		m_incomingBlocks.clear();
-	}
-
 	// If we've finished our initial sync send any new blocks.
 	if (m_grabbing == Grabbing::Nothing && m_chain.isKnown(m_latestBlockSent) && m_chain.details(m_latestBlockSent).totalDifficulty < m_chain.details(_currentHash).totalDifficulty)
 	{
+		// TODO: clean up
+		h256s hs;
+		hs.push_back(_currentHash);
 		RLPStream ts;
 		EthereumPeer::prep(ts);
 		bytes bs;
-		unsigned c = 0;
-		for (auto h: m_chain.treeRoute(m_latestBlockSent, _currentHash, nullptr, false, true))
-		{
+		for (auto h: hs)
 			bs += m_chain.block(h);
-			++c;
-		}
-		clog(NetMessageSummary) << "Sending" << c << "new blocks (current is" << _currentHash << ", was" << m_latestBlockSent << ")";
-		if (c > 1000)
-		{
-			cwarn << "Gaa this would be an awful lot of new blocks. Not bothering";
-			return;
-		}
+		clog(NetMessageSummary) << "Sending" << hs.size() << "new blocks (current is" << _currentHash << ", was" << m_latestBlockSent << ")";
 
-		ts.appendList(1 + c).append(BlocksPacket).appendRaw(bs, c);
+		ts.appendList(1 + hs.size()).append(BlocksPacket).appendRaw(bs, hs.size());
 		bytes b;
 		ts.swapOut(b);
 		seal(b);

libethereum/EthereumHost.h

@@ -85,9 +85,6 @@ private:
 	/// Sync with the BlockChain. It might contain one of our mined blocks, we might have new candidates from the network.
 	void doWork();
 
-	/// Called by peer to add incoming transactions.
-	void addIncomingTransaction(bytes const& _bytes) { std::lock_guard<std::recursive_mutex> l(m_incomingLock); m_incomingTransactions.push_back(_bytes); }
-
 	void maintainTransactions(TransactionQueue& _tq, h256 _currentBlock);
 	void maintainBlocks(BlockQueue& _bq, h256 _currentBlock);
 
@@ -116,10 +113,6 @@ private:
 
 	Grabbing m_grabbing = Grabbing::Nothing;	// TODO: needs to be thread-safe & switch to just having a peer id.
 
-	mutable std::recursive_mutex m_incomingLock;
-	std::vector<bytes> m_incomingTransactions;
-	std::vector<bytes> m_incomingBlocks;
-
 	DownloadMan m_man;
 
 	h256 m_latestBlockSent;

libethereum/EthereumPeer.cpp

@@ -38,7 +38,7 @@ EthereumPeer::EthereumPeer(Session* _s, HostCapabilityFace* _h):
 	Capability(_s, _h),
 	m_sub(host()->m_man)
 {
-	setGrabbing(Grabbing::State);
+	setAsking(Asking::State, Syncing::Done);
 	sendStatus();
 }
 
@@ -75,13 +75,19 @@ void EthereumPeer::startInitialSync()
 		sealAndSend(s);
 	}
 
-	host()->noteHavePeerState(this);
+	host()->notePeerStateChanged(this);
 }
 
 void EthereumPeer::tryGrabbingHashChain()
 {
+	if (m_asking != Asking::Nothing)
+	{
+		clogS(NetAllDetail) << "Can't synced with this peer - outstanding asks.";
+		return;
+	}
+
 	// if already done this, then ignore.
-	if (m_grabbing != Grabbing::State)
+	if (m_syncing == Syncing::Done)
 	{
 		clogS(NetAllDetail) << "Already synced with this peer.";
 		return;
@@ -95,7 +101,7 @@ void EthereumPeer::tryGrabbingHashChain()
 	if (td >= m_totalDifficulty)
 	{
 		clogS(NetAllDetail) << "No. Our chain is better.";
-		setGrabbing(Grabbing::Nothing);
+		setAsking(Asking::Nothing, Syncing::Done);
 		return;	// All good - we have the better chain.
 	}
 
@@ -103,8 +109,8 @@ void EthereumPeer::tryGrabbingHashChain()
 	{
 		clogS(NetAllDetail) << "Yes. Their chain is better.";
 
-		host()->updateGrabbing(Grabbing::Hashes);
-		setGrabbing(Grabbing::Hashes);
+		host()->updateGrabbing(Asking::Hashes);
+		setAsking(Asking::Hashes, Syncing::Executing);
 		RLPStream s;
 		prep(s).appendList(3);
 		s << GetBlockHashesPacket << m_latestHash << c_maxHashesAsk;
@@ -118,10 +124,10 @@ void EthereumPeer::giveUpOnFetch()
 	clogS(NetNote) << "Finishing fetch...";
 
 	// a bit overkill given that the other nodes may yet have the needed blocks, but better to be safe than sorry.
-	if (m_grabbing == Grabbing::Chain || m_grabbing == Grabbing::ChainHelper)
+	if (m_asking == Asking::Blocks || m_asking == Asking::ChainHelper)
 	{
 		host()->noteDoneBlocks(this);
-		setGrabbing(Grabbing::Nothing);
+		setAsking(Asking::Nothing);
 	}
 
 	// NOTE: need to notify of giving up on chain-hashes, too, altering state as necessary.
@@ -163,12 +169,11 @@ bool EthereumPeer::interpret(RLP const& _r)
 	{
 		clogS(NetMessageSummary) << "Transactions (" << dec << (_r.itemCount() - 1) << "entries)";
 		addRating(_r.itemCount() - 1);
-		lock_guard<recursive_mutex> l(host()->m_incomingLock);
+		RecursiveGuard l(m_incomingLock);
+		Guard l(x_knownTransactions);
 		for (unsigned i = 1; i < _r.itemCount(); ++i)
 		{
-			host()->addIncomingTransaction(_r[i].data().toBytes());
-			
-			lock_guard<mutex> l(x_knownTransactions);
+			m_incomingTransactions.push_back(_r[i].data().toBytes());
 			m_knownTransactions.insert(sha3(_r[i].data()));
 		}
 		break;
@@ -193,7 +198,7 @@ bool EthereumPeer::interpret(RLP const& _r)
 	{
 		clogS(NetMessageSummary) << "BlockHashes (" << dec << (_r.itemCount() - 1) << "entries)" << (_r.itemCount() - 1 ? "" : ": NoMoreHashes");
 
-		if (m_grabbing != Grabbing::Hashes)
+		if (m_asking != Asking::Hashes)
 		{
 			cwarn << "Peer giving us hashes when we didn't ask for them.";
 			break;
@@ -247,21 +252,62 @@ bool EthereumPeer::interpret(RLP const& _r)
 		if (_r.itemCount() == 1)
 		{
 			// Couldn't get any from last batch - probably got to this peer's latest block - just give up.
-			if (m_grabbing == Grabbing::Chain || m_grabbing == Grabbing::ChainHelper)
+			if (m_asking == Asking::Blocks || m_asking == Asking::ChainHelper)
 				giveUpOnFetch();
 			break;
 		}
 
-		unsigned used = 0;
+		unsigned success = 0;
+		unsigned got = 0;
+		unsigned bad = 0;
+		unsigned unknown = 0;
+		unsigned future = 0;
+
 		for (unsigned i = 1; i < _r.itemCount(); ++i)
 		{
 			auto h = BlockInfo::headerHash(_r[i].data());
 			m_sub.noteBlock(h);
-			if (host()->noteBlock(h, _r[i].data()))
-				used++;
-			Guard l(x_knownBlocks);
-			m_knownBlocks.insert(h);
+
+			{
+				Guard l(x_knownBlocks);
+				m_knownBlocks.insert(h);
+			}
+
+			switch (host()->m_bq.import(_r[i].data(), host()->m_chain))
+			{
+			case ImportResult::Success:
+				success++;
+				break;
+
+			case ImportResult::Malformed:
+				bad++;
+				break;
+
+			case ImportResult::FutureTime:
+				future++;
+				break;
+
+			case ImportResult::AlreadyInChain:
+			case ImportResult::AlreadyKnown:
+				got++;
+				break;
+
+			case ImportResult::UnknownParent:
+				unknown++;
+				break;
+			}
+		}
+
+		if (unknown && m_asking == Asking::Nothing)
+		{
+			// TODO: kick off resync.
+		}
+
+		if (bad)
+		{
+			// TODO: punish peer
 		}
+
 		addRating(used);
 		unsigned knownParents = 0;
 		unsigned unknownParents = 0;
@@ -286,7 +332,7 @@ bool EthereumPeer::interpret(RLP const& _r)
 			}
 		}
 		clogS(NetMessageSummary) << dec << knownParents << "known parents," << unknownParents << "unknown," << used << "used.";
-		if (m_grabbing == Grabbing::Chain || m_grabbing == Grabbing::ChainHelper)
+		if (m_asking == Asking::Blocks || m_asking == Asking::ChainHelper)
 			continueGettingChain();
 		break;
 	}
@@ -298,20 +344,18 @@ bool EthereumPeer::interpret(RLP const& _r)
 
 void EthereumPeer::ensureGettingChain()
 {
-	if (m_grabbing == Grabbing::ChainHelper)
+	if (m_helping)
 		return;	// Already asked & waiting for some.
 
-	// Switch to ChainHelper otherwise, unless we're already the Chain grabber.
-	if (m_grabbing != Grabbing::Chain)
-		setGrabbing(Grabbing::ChainHelper);
-
+	// Help otherwise, unless we're already the Chain grabber.
+	setHelping(true);
 	continueGettingChain();
 }
 
 void EthereumPeer::continueGettingChain()
 {
 	// If we're getting the hashes already, then we shouldn't be asking for the chain.
-	if (m_grabbing == Grabbing::Hashes)
+	if (m_asking == Asking::Hashes)
 		return;
 
 	auto blocks = m_sub.nextFetch(c_maxBlocksAsk);
@@ -329,8 +373,24 @@ void EthereumPeer::continueGettingChain()
 		giveUpOnFetch();
 }
 
-void EthereumPeer::setGrabbing(Grabbing _g)
+/*
+ * Possible asking/syncing states for two peers:
+ * state/		presync
+ * presync		hashes
+ * presync		chain		(transiently)
+ * presync+		chain
+ * presync		nothing
+ * hashes		nothing
+ * chain		hashes
+ * presync		chain		(transiently)
+ * presync+		chain
+ * presync		nothing
+ */
+
+void EthereumPeer::setAsking(Asking _a, Syncing _s)
 {
-	m_grabbing = _g;
-	session()->addNote("grab", _g == Grabbing::Nothing ? "nothing" : _g == Grabbing::State ? "state" : _g == Grabbing::Hashes ? "hashes" : _g == Grabbing::Chain ? "chain" : _g == Grabbing::ChainHelper ? "chainhelper" : "?");
+	m_asking = _a;
+	m_syncing = _s;
+	session()->addNote("ask", _a == Asking::Nothing ? "nothing" : _a == Asking::State ? "state" : _a == Asking::Hashes ? "hashes" : _a == Asking::Blocks ? "blocks" : "?");
+	session()->addNote("sync", _s == Syncing::Done ? "done" : _s == Syncing::Waiting ? "wait" : _s == Syncing::Executing ? "exec" : "?");
 }

libethereum/EthereumPeer.h

@@ -71,12 +71,14 @@ private:
 	void giveUpOnFetch();
 
 	void clearKnownTransactions() { std::lock_guard<std::mutex> l(x_knownTransactions); m_knownTransactions.clear(); }
-	void setGrabbing(Grabbing _g);
+	void setAsking(Asking _g, bool _helping = false);
+	void setHelping(bool _helping = false) { setAsking(m_asking, _helping); }
 	
 	unsigned m_protocolVersion;
 	u256 m_networkId;
 
-	Grabbing m_grabbing;
+	Asking m_asking;
+	Syncing m_syncing;
 
 	h256 m_latestHash;						///< Peer's latest block's hash.
 	u256 m_totalDifficulty;					///< Peer's latest block's total difficulty.

libp2p/Session.cpp

@@ -87,7 +87,7 @@ bool Session::interpret(RLP const& _r)
 		if (m_server->havePeer(m_id))
 		{
 			// Already connected.
-			cwarn << "Already have peer id" << m_id.abridged();// << "at" << l->endpoint() << "rather than" << endpoint();
+			clogS(NetWarn) << "Already have peer id" << m_id.abridged();// << "at" << l->endpoint() << "rather than" << endpoint();
 			disconnect(DuplicatePeer);
 			return false;
 		}
@@ -240,7 +240,7 @@ void Session::sendDestroy(bytes& _msg)
 
 	if (!checkPacket(bytesConstRef(&_msg)))
 	{
-		cwarn << "INVALID PACKET CONSTRUCTED!";
+		clogS(NetWarn) << "INVALID PACKET CONSTRUCTED!";
 	}
 
 	bytes buffer = bytes(std::move(_msg));
@@ -253,7 +253,7 @@ void Session::send(bytesConstRef _msg)
 	
 	if (!checkPacket(_msg))
 	{
-		cwarn << "INVALID PACKET CONSTRUCTED!";
+		clogS(NetWarn) << "INVALID PACKET CONSTRUCTED!";
 	}
 
 	bytes buffer = bytes(_msg.toBytes());
@@ -288,7 +288,7 @@ void Session::write()
 		// must check queue, as write callback can occur following dropped()
 		if (ec)
 		{
-			cwarn << "Error sending: " << ec.message();
+			clogS(NetWarn) << "Error sending: " << ec.message();
 			dropped();
 			return;
 		}
@@ -363,7 +363,7 @@ void Session::doRead()
 		if (ec && ec.category() != boost::asio::error::get_misc_category() && ec.value() != boost::asio::error::eof)
 		{
 			// got here with length of 1241...
-			cwarn << "Error reading: " << ec.message();
+			clogS(NetWarn) << "Error reading: " << ec.message();
 			dropped();
 		}
 		else if (ec && length == 0)
@@ -380,7 +380,7 @@ void Session::doRead()
 				{
 					if (m_incoming[0] != 0x22 || m_incoming[1] != 0x40 || m_incoming[2] != 0x08 || m_incoming[3] != 0x91)
 					{
-						cwarn << "INVALID SYNCHRONISATION TOKEN; expected = 22400891; received = " << toHex(bytesConstRef(m_incoming.data(), 4));
+						clogS(NetWarn) << "INVALID SYNCHRONISATION TOKEN; expected = 22400891; received = " << toHex(bytesConstRef(m_incoming.data(), 4));
 						disconnect(BadProtocol);
 						return;
 					}
@@ -396,7 +396,7 @@ void Session::doRead()
 						if (!checkPacket(data))
 						{
 							cerr << "Received " << len << ": " << toHex(bytesConstRef(m_incoming.data() + 8, len)) << endl;
-							cwarn << "INVALID MESSAGE RECEIVED";
+							clogS(NetWarn) << "INVALID MESSAGE RECEIVED";
 							disconnect(BadProtocol);
 							return;
 						}