Gav Wood
11 years ago
24 changed files with 627 additions and 1477 deletions
@ -0,0 +1,307 @@ |
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/*
|
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This file is part of cpp-ethereum. |
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|
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cpp-ethereum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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|
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cpp-ethereum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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/** @file EthereumPeer.cpp
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* @author Gav Wood <i@gavwood.com> |
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* @date 2014 |
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*/ |
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#include "EthereumPeer.h" |
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#include <chrono> |
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#include <libethential/Common.h> |
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#include <libethcore/Exceptions.h> |
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#include <libethnet/PeerSession.h> |
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#include "BlockChain.h" |
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#include "EthereumHost.h" |
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using namespace std; |
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using namespace eth; |
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#define clogS(X) eth::LogOutputStream<X, true>(false) << "| " << std::setw(2) << session()->id() << "] " |
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EthereumPeer::EthereumPeer(PeerSession* _s, HostCapabilityFace* _h): PeerCapability(_s, _h) |
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{ |
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sendStatus(); |
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} |
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EthereumPeer::~EthereumPeer() |
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{ |
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giveUpOnFetch(); |
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} |
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EthereumHost* EthereumPeer::host() const |
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{ |
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return static_cast<EthereumHost*>(PeerCapability::hostCapability()); |
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} |
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|
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void EthereumPeer::sendStatus() |
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{ |
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RLPStream s; |
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prep(s); |
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s.appendList(6) << StatusPacket |
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<< host()->protocolVersion() |
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<< host()->networkId() |
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<< host()->m_chain->details().totalDifficulty |
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<< host()->m_chain->currentHash() |
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<< host()->m_chain->genesisHash(); |
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sealAndSend(s); |
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} |
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|
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void EthereumPeer::startInitialSync() |
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{ |
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// Grab trsansactions off them.
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{ |
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RLPStream s; |
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prep(s).appendList(1); |
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s << GetTransactionsPacket; |
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sealAndSend(s); |
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} |
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|
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h256 c = host()->m_chain->currentHash(); |
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uint n = host()->m_chain->number(); |
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u256 td = max(host()->m_chain->details().totalDifficulty, host()->m_totalDifficultyOfNeeded); |
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clogS(NetAllDetail) << "Initial sync. Latest:" << c.abridged() << ", number:" << n << ", TD: max(" << host()->m_chain->details().totalDifficulty << "," << host()->m_totalDifficultyOfNeeded << ") versus " << m_totalDifficulty; |
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if (td > m_totalDifficulty) |
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return; // All good - we have the better chain.
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// Our chain isn't better - grab theirs.
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{ |
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RLPStream s; |
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prep(s).appendList(3); |
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s << GetBlockHashesPacket << m_latestHash << c_maxHashesAsk; |
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m_neededBlocks = h256s(1, m_latestHash); |
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sealAndSend(s); |
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} |
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} |
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|
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inline string toString(h256s const& _bs) |
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{ |
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ostringstream out; |
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out << "[ "; |
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for (auto i: _bs) |
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out << i.abridged() << ", "; |
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out << "]"; |
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return out.str(); |
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} |
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|
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void EthereumPeer::giveUpOnFetch() |
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{ |
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clogS(NetNote) << "GIVE UP FETCH; can't get " << toString(m_askedBlocks); |
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if (m_askedBlocks.size()) |
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{ |
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Guard l (host()->x_blocksNeeded); |
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host()->m_blocksNeeded.reserve(host()->m_blocksNeeded.size() + m_askedBlocks.size()); |
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for (auto i: m_askedBlocks) |
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{ |
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m_failedBlocks.insert(i); |
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host()->m_blocksOnWay.erase(i); |
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host()->m_blocksNeeded.push_back(i); |
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} |
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m_askedBlocks.clear(); |
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} |
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} |
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bool EthereumPeer::interpret(RLP const& _r) |
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{ |
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switch (_r[0].toInt<unsigned>()) |
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{ |
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case StatusPacket: |
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{ |
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m_protocolVersion = _r[1].toInt<uint>(); |
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m_networkId = _r[2].toInt<u256>(); |
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m_totalDifficulty = _r[3].toInt<u256>(); |
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m_latestHash = _r[4].toHash<h256>(); |
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auto genesisHash = _r[5].toHash<h256>(); |
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clogS(NetMessageSummary) << "Status: " << m_protocolVersion << "/" << m_networkId << "/" << genesisHash.abridged() << ", TD:" << m_totalDifficulty << "=" << m_latestHash.abridged(); |
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if (genesisHash != host()->m_chain->genesisHash()) |
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disable("Invalid genesis hash"); |
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if (m_protocolVersion != host()->protocolVersion()) |
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disable("Invalid protocol version."); |
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if (m_networkId != host()->networkId()) |
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disable("Invalid network identifier."); |
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startInitialSync(); |
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break; |
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} |
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case GetTransactionsPacket: |
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{ |
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m_requireTransactions = true; |
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break; |
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} |
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case TransactionsPacket: |
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clogS(NetMessageSummary) << "Transactions (" << dec << (_r.itemCount() - 1) << " entries)"; |
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addRating(_r.itemCount() - 1); |
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for (unsigned i = 1; i < _r.itemCount(); ++i) |
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{ |
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host()->m_incomingTransactions.push_back(_r[i].data().toBytes()); |
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m_knownTransactions.insert(sha3(_r[i].data())); |
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} |
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break; |
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case GetBlockHashesPacket: |
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{ |
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h256 later = _r[1].toHash<h256>(); |
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unsigned limit = _r[2].toInt<unsigned>(); |
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clogS(NetMessageSummary) << "GetBlockHashes (" << limit << "entries, " << later.abridged() << ")"; |
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unsigned c = min<unsigned>(host()->m_chain->number(later), limit); |
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RLPStream s; |
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prep(s).appendList(1 + c).append(BlockHashesPacket); |
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h256 p = host()->m_chain->details(later).parent; |
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for (unsigned i = 0; i < c; ++i, p = host()->m_chain->details(p).parent) |
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s << p; |
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sealAndSend(s); |
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break; |
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} |
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case BlockHashesPacket: |
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{ |
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clogS(NetMessageSummary) << "BlockHashes (" << dec << (_r.itemCount() - 1) << " entries)"; |
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if (_r.itemCount() == 1) |
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{ |
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host()->noteHaveChain(this); |
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return true; |
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} |
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for (unsigned i = 1; i < _r.itemCount(); ++i) |
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{ |
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auto h = _r[i].toHash<h256>(); |
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if (host()->m_chain->details(h)) |
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{ |
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host()->noteHaveChain(this); |
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return true; |
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} |
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else |
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m_neededBlocks.push_back(h); |
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} |
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// run through - ask for more.
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RLPStream s; |
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prep(s).appendList(3); |
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s << GetBlockHashesPacket << m_neededBlocks.back() << c_maxHashesAsk; |
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sealAndSend(s); |
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break; |
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} |
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case GetBlocksPacket: |
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{ |
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clogS(NetMessageSummary) << "GetBlocks (" << dec << (_r.itemCount() - 1) << " entries)"; |
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// TODO: return the requested blocks.
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bytes rlp; |
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unsigned n = 0; |
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for (unsigned i = 1; i < _r.itemCount() && i <= c_maxBlocks; ++i) |
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{ |
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auto b = host()->m_chain->block(_r[i].toHash<h256>()); |
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if (b.size()) |
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{ |
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rlp += b; |
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++n; |
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} |
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} |
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RLPStream s; |
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sealAndSend(prep(s).appendList(n + 1).append(BlocksPacket).appendRaw(rlp, n)); |
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break; |
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} |
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case BlocksPacket: |
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{ |
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clogS(NetMessageSummary) << "Blocks (" << dec << (_r.itemCount() - 1) << " entries)"; |
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if (_r.itemCount() == 1 && !m_askedBlocksChanged) |
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{ |
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// Couldn't get any from last batch - probably got to this peer's latest block - just give up.
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giveUpOnFetch(); |
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} |
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m_askedBlocksChanged = false; |
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unsigned used = 0; |
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for (unsigned i = 1; i < _r.itemCount(); ++i) |
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{ |
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auto h = BlockInfo::headerHash(_r[i].data()); |
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if (host()->noteBlock(h, _r[i].data())) |
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used++; |
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m_askedBlocks.erase(h); |
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m_knownBlocks.insert(h); |
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} |
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addRating(used); |
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unsigned knownParents = 0; |
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unsigned unknownParents = 0; |
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if (g_logVerbosity >= NetMessageSummary::verbosity) |
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{ |
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for (unsigned i = 1; i < _r.itemCount(); ++i) |
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{ |
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auto h = BlockInfo::headerHash(_r[i].data()); |
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BlockInfo bi(_r[i].data()); |
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if (!host()->m_chain->details(bi.parentHash) && !m_knownBlocks.count(bi.parentHash)) |
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{ |
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unknownParents++; |
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clogS(NetAllDetail) << "Unknown parent " << bi.parentHash << " of block " << h; |
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} |
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else |
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{ |
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knownParents++; |
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clogS(NetAllDetail) << "Known parent " << bi.parentHash << " of block " << h; |
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} |
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} |
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} |
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clogS(NetMessageSummary) << dec << knownParents << " known parents, " << unknownParents << "unknown, " << used << "used."; |
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continueGettingChain(); |
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break; |
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} |
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default: |
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return false; |
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} |
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return true; |
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} |
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void EthereumPeer::restartGettingChain() |
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{ |
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if (m_askedBlocks.size()) |
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{ |
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m_askedBlocksChanged = true; // So that we continue even if the Ask's reply is empty.
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m_askedBlocks.clear(); // So that we restart once we get the Ask's reply.
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m_failedBlocks.clear(); |
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} |
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else |
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ensureGettingChain(); |
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} |
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void EthereumPeer::ensureGettingChain() |
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{ |
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if (m_askedBlocks.size()) |
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return; // Already asked & waiting for some.
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continueGettingChain(); |
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} |
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void EthereumPeer::continueGettingChain() |
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{ |
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if (!m_askedBlocks.size()) |
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m_askedBlocks = host()->neededBlocks(m_failedBlocks); |
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if (m_askedBlocks.size()) |
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{ |
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RLPStream s; |
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prep(s); |
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s.appendList(m_askedBlocks.size() + 1) << GetBlocksPacket; |
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for (auto i: m_askedBlocks) |
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s << i; |
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sealAndSend(s); |
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} |
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else |
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{ |
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clogS(NetMessageSummary) << "No blocks left to get. Peer doesn't seem to have " << m_failedBlocks.size() << "of our needed blocks."; |
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host()->noteDoneBlocks(); |
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} |
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} |
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@ -1,660 +0,0 @@ |
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/*
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This file is part of cpp-ethereum. |
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|
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cpp-ethereum is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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|
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cpp-ethereum is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/ |
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/** @file EthereumSession.cpp
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* @author Gav Wood <i@gavwood.com> |
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* @date 2014 |
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*/ |
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#include "EthereumSession.h" |
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#include <chrono> |
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#include <libethential/Common.h> |
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#include <libethcore/Exceptions.h> |
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#include "BlockChain.h" |
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#include "EthereumHost.h" |
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using namespace std; |
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using namespace eth; |
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#define clogS(X) eth::LogOutputStream<X, true>(false) << "| " << std::setw(2) << m_socket.native_handle() << "] " |
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EthereumSession::EthereumSession(EthereumHost* _s, bi::tcp::socket _socket, u256 _rNId, bi::address _peerAddress, unsigned short _peerPort): |
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m_server(_s), |
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m_socket(std::move(_socket)), |
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m_reqNetworkId(_rNId), |
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m_listenPort(_peerPort), |
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m_rating(0) |
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{ |
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m_disconnect = std::chrono::steady_clock::time_point::max(); |
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m_connect = std::chrono::steady_clock::now(); |
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m_info = PeerInfo({"?", _peerAddress.to_string(), m_listenPort, std::chrono::steady_clock::duration(0)}); |
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} |
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EthereumSession::~EthereumSession() |
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{ |
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giveUpOnFetch(); |
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// Read-chain finished for one reason or another.
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try |
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{ |
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if (m_socket.is_open()) |
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m_socket.close(); |
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} |
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catch (...){} |
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} |
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inline string toString(h256s const& _bs) |
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{ |
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ostringstream out; |
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out << "[ "; |
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for (auto i: _bs) |
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out << i.abridged() << ", "; |
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out << "]"; |
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return out.str(); |
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} |
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void EthereumSession::giveUpOnFetch() |
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{ |
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clogS(NetNote) << "GIVE UP FETCH; can't get " << toString(m_askedBlocks); |
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if (m_askedBlocks.size()) |
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{ |
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Guard l (m_server->x_blocksNeeded); |
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m_server->m_blocksNeeded.reserve(m_server->m_blocksNeeded.size() + m_askedBlocks.size()); |
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for (auto i: m_askedBlocks) |
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{ |
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m_failedBlocks.insert(i); |
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m_server->m_blocksOnWay.erase(i); |
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m_server->m_blocksNeeded.push_back(i); |
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} |
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m_askedBlocks.clear(); |
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} |
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} |
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bi::tcp::endpoint EthereumSession::endpoint() const |
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{ |
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if (m_socket.is_open()) |
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try |
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{ |
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return bi::tcp::endpoint(m_socket.remote_endpoint().address(), m_listenPort); |
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} |
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catch (...){} |
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return bi::tcp::endpoint(); |
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} |
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bool EthereumSession::interpret(RLP const& _r) |
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{ |
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clogS(NetRight) << _r; |
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switch (_r[0].toInt<unsigned>()) |
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{ |
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case HelloPacket: |
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{ |
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m_protocolVersion = _r[1].toInt<uint>(); |
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m_networkId = _r[2].toInt<u256>(); |
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auto clientVersion = _r[3].toString(); |
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m_caps = _r[4].toInt<uint>(); |
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m_listenPort = _r[5].toInt<unsigned short>(); |
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m_id = _r[6].toHash<h512>(); |
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m_totalDifficulty = _r[7].toInt<u256>(); |
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m_latestHash = _r[8].toHash<h256>(); |
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auto genesisHash = _r[9].toHash<h256>(); |
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clogS(NetMessageSummary) << "Hello: " << clientVersion << "V[" << m_protocolVersion << "/" << m_networkId << "/" << genesisHash.abridged() << "]" << m_id.abridged() << showbase << hex << m_caps << dec << m_listenPort; |
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if (m_server->havePeer(m_id)) |
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{ |
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// Already connected.
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cwarn << "Already have peer id" << m_id.abridged();// << "at" << l->endpoint() << "rather than" << endpoint();
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disconnect(DuplicatePeer); |
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return false; |
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} |
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|
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if (genesisHash != m_server->m_chain->genesisHash()) |
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{ |
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disconnect(WrongGenesis); |
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return false; |
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} |
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|
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if (m_protocolVersion != EthereumHost::protocolVersion() || m_networkId != m_server->networkId() || !m_id) |
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{ |
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disconnect(IncompatibleProtocol); |
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return false; |
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} |
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try |
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{ m_info = PeerInfo({clientVersion, m_socket.remote_endpoint().address().to_string(), m_listenPort, std::chrono::steady_clock::duration()}); } |
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catch (...) |
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{ |
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disconnect(BadProtocol); |
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return false; |
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} |
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|
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m_server->registerPeer(shared_from_this()); |
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startInitialSync(); |
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|
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// Grab trsansactions off them.
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{ |
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RLPStream s; |
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prep(s).appendList(1); |
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s << GetTransactionsPacket; |
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sealAndSend(s); |
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} |
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break; |
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} |
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case DisconnectPacket: |
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{ |
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string reason = "Unspecified"; |
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if (_r[1].isInt()) |
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reason = reasonOf((DisconnectReason)_r[1].toInt<int>()); |
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|
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clogS(NetMessageSummary) << "Disconnect (reason: " << reason << ")"; |
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if (m_socket.is_open()) |
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clogS(NetNote) << "Closing " << m_socket.remote_endpoint(); |
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else |
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clogS(NetNote) << "Remote closed."; |
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m_socket.close(); |
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return false; |
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} |
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case PingPacket: |
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{ |
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clogS(NetTriviaSummary) << "Ping"; |
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RLPStream s; |
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sealAndSend(prep(s).appendList(1) << PongPacket); |
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break; |
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} |
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case PongPacket: |
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m_info.lastPing = std::chrono::steady_clock::now() - m_ping; |
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clogS(NetTriviaSummary) << "Latency: " << chrono::duration_cast<chrono::milliseconds>(m_info.lastPing).count() << " ms"; |
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break; |
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case GetPeersPacket: |
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{ |
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clogS(NetTriviaSummary) << "GetPeers"; |
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auto peers = m_server->potentialPeers(); |
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RLPStream s; |
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prep(s).appendList(peers.size() + 1); |
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s << PeersPacket; |
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for (auto i: peers) |
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{ |
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clogS(NetTriviaDetail) << "Sending peer " << i.first.abridged() << i.second; |
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s.appendList(3) << bytesConstRef(i.second.address().to_v4().to_bytes().data(), 4) << i.second.port() << i.first; |
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} |
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sealAndSend(s); |
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break; |
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} |
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case PeersPacket: |
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clogS(NetTriviaSummary) << "Peers (" << dec << (_r.itemCount() - 1) << " entries)"; |
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for (unsigned i = 1; i < _r.itemCount(); ++i) |
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{ |
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bi::address_v4 peerAddress(_r[i][0].toHash<FixedHash<4>>().asArray()); |
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auto ep = bi::tcp::endpoint(peerAddress, _r[i][1].toInt<short>()); |
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Public id = _r[i][2].toHash<Public>(); |
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if (isPrivateAddress(peerAddress)) |
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goto CONTINUE; |
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|
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clogS(NetAllDetail) << "Checking: " << ep << "(" << id.abridged() << ")"; |
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|
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// check that it's not us or one we already know:
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if (id && (m_server->m_key.pub() == id || m_server->havePeer(id) || m_server->m_incomingPeers.count(id))) |
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goto CONTINUE; |
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|
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// check that we're not already connected to addr:
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if (!ep.port()) |
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goto CONTINUE; |
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for (auto i: m_server->m_addresses) |
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if (ep.address() == i && ep.port() == m_server->listenPort()) |
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goto CONTINUE; |
|||
for (auto i: m_server->m_incomingPeers) |
|||
if (i.second.first == ep) |
|||
goto CONTINUE; |
|||
m_server->m_incomingPeers[id] = make_pair(ep, 0); |
|||
m_server->m_freePeers.push_back(id); |
|||
m_server->noteNewPeers(); |
|||
clogS(NetTriviaDetail) << "New peer: " << ep << "(" << id << ")"; |
|||
CONTINUE:; |
|||
} |
|||
break; |
|||
case TransactionsPacket: |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
clogS(NetMessageSummary) << "Transactions (" << dec << (_r.itemCount() - 1) << " entries)"; |
|||
m_rating += _r.itemCount() - 1; |
|||
for (unsigned i = 1; i < _r.itemCount(); ++i) |
|||
{ |
|||
m_server->m_incomingTransactions.push_back(_r[i].data().toBytes()); |
|||
m_knownTransactions.insert(sha3(_r[i].data())); |
|||
} |
|||
break; |
|||
case GetBlockHashesPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
h256 later = _r[1].toHash<h256>(); |
|||
unsigned limit = _r[2].toInt<unsigned>(); |
|||
clogS(NetMessageSummary) << "GetBlockHashes (" << limit << "entries, " << later.abridged() << ")"; |
|||
|
|||
unsigned c = min<unsigned>(m_server->m_chain->number(later), limit); |
|||
|
|||
RLPStream s; |
|||
prep(s).appendList(1 + c).append(BlockHashesPacket); |
|||
h256 p = m_server->m_chain->details(later).parent; |
|||
for (unsigned i = 0; i < c; ++i, p = m_server->m_chain->details(p).parent) |
|||
s << p; |
|||
sealAndSend(s); |
|||
break; |
|||
} |
|||
case BlockHashesPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
clogS(NetMessageSummary) << "BlockHashes (" << dec << (_r.itemCount() - 1) << " entries)"; |
|||
if (_r.itemCount() == 1) |
|||
{ |
|||
m_server->noteHaveChain(shared_from_this()); |
|||
return true; |
|||
} |
|||
for (unsigned i = 1; i < _r.itemCount(); ++i) |
|||
{ |
|||
auto h = _r[i].toHash<h256>(); |
|||
if (m_server->m_chain->details(h)) |
|||
{ |
|||
m_server->noteHaveChain(shared_from_this()); |
|||
return true; |
|||
} |
|||
else |
|||
m_neededBlocks.push_back(h); |
|||
} |
|||
// run through - ask for more.
|
|||
RLPStream s; |
|||
prep(s).appendList(3); |
|||
s << GetBlockHashesPacket << m_neededBlocks.back() << c_maxHashesAsk; |
|||
sealAndSend(s); |
|||
break; |
|||
} |
|||
case GetBlocksPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
clogS(NetMessageSummary) << "GetBlocks (" << dec << (_r.itemCount() - 1) << " entries)"; |
|||
// TODO: return the requested blocks.
|
|||
bytes rlp; |
|||
unsigned n = 0; |
|||
for (unsigned i = 1; i < _r.itemCount() && i <= c_maxBlocks; ++i) |
|||
{ |
|||
auto b = m_server->m_chain->block(_r[i].toHash<h256>()); |
|||
if (b.size()) |
|||
{ |
|||
rlp += b; |
|||
++n; |
|||
} |
|||
} |
|||
RLPStream s; |
|||
sealAndSend(prep(s).appendList(n + 1).append(BlocksPacket).appendRaw(rlp, n)); |
|||
break; |
|||
} |
|||
case BlocksPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
clogS(NetMessageSummary) << "Blocks (" << dec << (_r.itemCount() - 1) << " entries)"; |
|||
|
|||
if (_r.itemCount() == 1 && !m_askedBlocksChanged) |
|||
{ |
|||
// Couldn't get any from last batch - probably got to this peer's latest block - just give up.
|
|||
giveUpOnFetch(); |
|||
} |
|||
m_askedBlocksChanged = false; |
|||
|
|||
unsigned used = 0; |
|||
for (unsigned i = 1; i < _r.itemCount(); ++i) |
|||
{ |
|||
auto h = BlockInfo::headerHash(_r[i].data()); |
|||
if (m_server->noteBlock(h, _r[i].data())) |
|||
used++; |
|||
m_askedBlocks.erase(h); |
|||
m_knownBlocks.insert(h); |
|||
} |
|||
m_rating += used; |
|||
unsigned knownParents = 0; |
|||
unsigned unknownParents = 0; |
|||
if (g_logVerbosity >= NetMessageSummary::verbosity) |
|||
{ |
|||
for (unsigned i = 1; i < _r.itemCount(); ++i) |
|||
{ |
|||
auto h = BlockInfo::headerHash(_r[i].data()); |
|||
BlockInfo bi(_r[i].data()); |
|||
if (!m_server->m_chain->details(bi.parentHash) && !m_knownBlocks.count(bi.parentHash)) |
|||
{ |
|||
unknownParents++; |
|||
clogS(NetAllDetail) << "Unknown parent " << bi.parentHash << " of block " << h; |
|||
} |
|||
else |
|||
{ |
|||
knownParents++; |
|||
clogS(NetAllDetail) << "Known parent " << bi.parentHash << " of block " << h; |
|||
} |
|||
} |
|||
} |
|||
clogS(NetMessageSummary) << dec << knownParents << " known parents, " << unknownParents << "unknown, " << used << "used."; |
|||
continueGettingChain(); |
|||
break; |
|||
} |
|||
case GetTransactionsPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
m_requireTransactions = true; |
|||
break; |
|||
} |
|||
default: |
|||
break; |
|||
} |
|||
return true; |
|||
} |
|||
|
|||
void EthereumSession::restartGettingChain() |
|||
{ |
|||
if (m_askedBlocks.size()) |
|||
{ |
|||
m_askedBlocksChanged = true; // So that we continue even if the Ask's reply is empty.
|
|||
m_askedBlocks.clear(); // So that we restart once we get the Ask's reply.
|
|||
m_failedBlocks.clear(); |
|||
} |
|||
else |
|||
ensureGettingChain(); |
|||
} |
|||
|
|||
void EthereumSession::ensureGettingChain() |
|||
{ |
|||
if (m_askedBlocks.size()) |
|||
return; // Already asked & waiting for some.
|
|||
|
|||
continueGettingChain(); |
|||
} |
|||
|
|||
void EthereumSession::continueGettingChain() |
|||
{ |
|||
if (!m_askedBlocks.size()) |
|||
m_askedBlocks = m_server->neededBlocks(m_failedBlocks); |
|||
|
|||
if (m_askedBlocks.size()) |
|||
{ |
|||
RLPStream s; |
|||
prep(s); |
|||
s.appendList(m_askedBlocks.size() + 1) << GetBlocksPacket; |
|||
for (auto i: m_askedBlocks) |
|||
s << i; |
|||
sealAndSend(s); |
|||
} |
|||
else |
|||
{ |
|||
clogS(NetMessageSummary) << "No blocks left to get. Peer doesn't seem to have " << m_failedBlocks.size() << "of our needed blocks."; |
|||
m_server->noteDoneBlocks(); |
|||
} |
|||
} |
|||
|
|||
void EthereumSession::ping() |
|||
{ |
|||
RLPStream s; |
|||
sealAndSend(prep(s).appendList(1) << PingPacket); |
|||
m_ping = std::chrono::steady_clock::now(); |
|||
} |
|||
|
|||
void EthereumSession::getPeers() |
|||
{ |
|||
RLPStream s; |
|||
sealAndSend(prep(s).appendList(1) << GetPeersPacket); |
|||
} |
|||
|
|||
RLPStream& EthereumSession::prep(RLPStream& _s) |
|||
{ |
|||
return _s.appendRaw(bytes(8, 0)); |
|||
} |
|||
|
|||
void EthereumSession::sealAndSend(RLPStream& _s) |
|||
{ |
|||
bytes b; |
|||
_s.swapOut(b); |
|||
m_server->seal(b); |
|||
sendDestroy(b); |
|||
} |
|||
|
|||
bool EthereumSession::checkPacket(bytesConstRef _msg) |
|||
{ |
|||
if (_msg.size() < 8) |
|||
return false; |
|||
if (!(_msg[0] == 0x22 && _msg[1] == 0x40 && _msg[2] == 0x08 && _msg[3] == 0x91)) |
|||
return false; |
|||
uint32_t len = ((_msg[4] * 256 + _msg[5]) * 256 + _msg[6]) * 256 + _msg[7]; |
|||
if (_msg.size() != len + 8) |
|||
return false; |
|||
RLP r(_msg.cropped(8)); |
|||
if (r.actualSize() != len) |
|||
return false; |
|||
return true; |
|||
} |
|||
|
|||
void EthereumSession::sendDestroy(bytes& _msg) |
|||
{ |
|||
clogS(NetLeft) << RLP(bytesConstRef(&_msg).cropped(8)); |
|||
|
|||
if (!checkPacket(bytesConstRef(&_msg))) |
|||
{ |
|||
cwarn << "INVALID PACKET CONSTRUCTED!"; |
|||
} |
|||
|
|||
bytes buffer = bytes(std::move(_msg)); |
|||
writeImpl(buffer); |
|||
} |
|||
|
|||
void EthereumSession::send(bytesConstRef _msg) |
|||
{ |
|||
clogS(NetLeft) << RLP(_msg.cropped(8)); |
|||
|
|||
if (!checkPacket(_msg)) |
|||
{ |
|||
cwarn << "INVALID PACKET CONSTRUCTED!"; |
|||
} |
|||
|
|||
bytes buffer = bytes(_msg.toBytes()); |
|||
writeImpl(buffer); |
|||
} |
|||
|
|||
void EthereumSession::writeImpl(bytes& _buffer) |
|||
{ |
|||
// cerr << (void*)this << " writeImpl" << endl;
|
|||
if (!m_socket.is_open()) |
|||
return; |
|||
|
|||
lock_guard<recursive_mutex> l(m_writeLock); |
|||
m_writeQueue.push_back(_buffer); |
|||
if (m_writeQueue.size() == 1) |
|||
write(); |
|||
} |
|||
|
|||
void EthereumSession::write() |
|||
{ |
|||
// cerr << (void*)this << " write" << endl;
|
|||
lock_guard<recursive_mutex> l(m_writeLock); |
|||
if (m_writeQueue.empty()) |
|||
return; |
|||
|
|||
const bytes& bytes = m_writeQueue[0]; |
|||
auto self(shared_from_this()); |
|||
ba::async_write(m_socket, ba::buffer(bytes), [this, self](boost::system::error_code ec, std::size_t /*length*/) |
|||
{ |
|||
// cerr << (void*)this << " write.callback" << endl;
|
|||
|
|||
// must check queue, as write callback can occur following dropped()
|
|||
if (ec) |
|||
{ |
|||
cwarn << "Error sending: " << ec.message(); |
|||
dropped(); |
|||
} |
|||
else |
|||
{ |
|||
m_writeQueue.pop_front(); |
|||
write(); |
|||
} |
|||
}); |
|||
} |
|||
|
|||
void EthereumSession::dropped() |
|||
{ |
|||
// cerr << (void*)this << " dropped" << endl;
|
|||
if (m_socket.is_open()) |
|||
try |
|||
{ |
|||
clogS(NetConnect) << "Closing " << m_socket.remote_endpoint(); |
|||
m_socket.close(); |
|||
} |
|||
catch (...) {} |
|||
} |
|||
|
|||
void EthereumSession::disconnect(int _reason) |
|||
{ |
|||
clogS(NetConnect) << "Disconnecting (reason:" << reasonOf((DisconnectReason)_reason) << ")"; |
|||
if (m_socket.is_open()) |
|||
{ |
|||
if (m_disconnect == chrono::steady_clock::time_point::max()) |
|||
{ |
|||
RLPStream s; |
|||
prep(s); |
|||
s.appendList(2) << DisconnectPacket << _reason; |
|||
sealAndSend(s); |
|||
m_disconnect = chrono::steady_clock::now(); |
|||
} |
|||
else |
|||
dropped(); |
|||
} |
|||
} |
|||
|
|||
void EthereumSession::start() |
|||
{ |
|||
RLPStream s; |
|||
prep(s); |
|||
s.appendList(10) << HelloPacket |
|||
<< (uint)EthereumHost::protocolVersion() |
|||
<< m_server->networkId() |
|||
<< m_server->m_clientVersion |
|||
<< (m_server->m_mode == NodeMode::Full ? 0x07 : m_server->m_mode == NodeMode::PeerServer ? 0x01 : 0) |
|||
<< m_server->m_public.port() |
|||
<< m_server->m_key.pub() |
|||
<< m_server->m_chain->details().totalDifficulty |
|||
<< m_server->m_chain->currentHash() |
|||
<< m_server->m_chain->genesisHash(); |
|||
sealAndSend(s); |
|||
ping(); |
|||
getPeers(); |
|||
|
|||
doRead(); |
|||
} |
|||
|
|||
void EthereumSession::startInitialSync() |
|||
{ |
|||
h256 c = m_server->m_chain->currentHash(); |
|||
uint n = m_server->m_chain->number(); |
|||
u256 td = max(m_server->m_chain->details().totalDifficulty, m_server->m_totalDifficultyOfNeeded); |
|||
|
|||
clogS(NetAllDetail) << "Initial sync. Latest:" << c.abridged() << ", number:" << n << ", TD: max(" << m_server->m_chain->details().totalDifficulty << "," << m_server->m_totalDifficultyOfNeeded << ") versus " << m_totalDifficulty; |
|||
if (td > m_totalDifficulty) |
|||
return; // All good - we have the better chain.
|
|||
|
|||
// Our chain isn't better - grab theirs.
|
|||
RLPStream s; |
|||
prep(s).appendList(3); |
|||
s << GetBlockHashesPacket << m_latestHash << c_maxHashesAsk; |
|||
m_neededBlocks = h256s(1, m_latestHash); |
|||
sealAndSend(s); |
|||
} |
|||
|
|||
void EthereumSession::doRead() |
|||
{ |
|||
// ignore packets received while waiting to disconnect
|
|||
if (chrono::steady_clock::now() - m_disconnect > chrono::seconds(0)) |
|||
return; |
|||
|
|||
auto self(shared_from_this()); |
|||
m_socket.async_read_some(boost::asio::buffer(m_data), [this,self](boost::system::error_code ec, std::size_t length) |
|||
{ |
|||
// If error is end of file, ignore
|
|||
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(); |
|||
dropped(); |
|||
} |
|||
else if (ec && length == 0) |
|||
{ |
|||
return; |
|||
} |
|||
else |
|||
{ |
|||
try |
|||
{ |
|||
m_incoming.resize(m_incoming.size() + length); |
|||
memcpy(m_incoming.data() + m_incoming.size() - length, m_data.data(), length); |
|||
while (m_incoming.size() > 8) |
|||
{ |
|||
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)); |
|||
disconnect(BadProtocol); |
|||
return; |
|||
} |
|||
else |
|||
{ |
|||
uint32_t len = fromBigEndian<uint32_t>(bytesConstRef(m_incoming.data() + 4, 4)); |
|||
uint32_t tlen = len + 8; |
|||
if (m_incoming.size() < tlen) |
|||
break; |
|||
|
|||
// enough has come in.
|
|||
auto data = bytesConstRef(m_incoming.data(), tlen); |
|||
if (!checkPacket(data)) |
|||
{ |
|||
cerr << "Received " << len << ": " << toHex(bytesConstRef(m_incoming.data() + 8, len)) << endl; |
|||
cwarn << "INVALID MESSAGE RECEIVED"; |
|||
disconnect(BadProtocol); |
|||
return; |
|||
} |
|||
else |
|||
{ |
|||
RLP r(data.cropped(8)); |
|||
if (!interpret(r)) |
|||
{ |
|||
// error
|
|||
dropped(); |
|||
return; |
|||
} |
|||
} |
|||
memmove(m_incoming.data(), m_incoming.data() + tlen, m_incoming.size() - tlen); |
|||
m_incoming.resize(m_incoming.size() - tlen); |
|||
} |
|||
} |
|||
doRead(); |
|||
} |
|||
catch (Exception const& _e) |
|||
{ |
|||
clogS(NetWarn) << "ERROR: " << _e.description(); |
|||
dropped(); |
|||
} |
|||
catch (std::exception const& _e) |
|||
{ |
|||
clogS(NetWarn) << "ERROR: " << _e.what(); |
|||
dropped(); |
|||
} |
|||
} |
|||
}); |
|||
} |
|||
@ -0,0 +1,6 @@ |
|||
#pragma once |
|||
|
|||
#include "Common.h" |
|||
#include "PeerHost.h" |
|||
#include "PeerSession.h" |
|||
|
|||
Loading…
Reference in new issue