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136 lines
4.5 KiB
136 lines
4.5 KiB
/*
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This file is part of cpp-ethereum.
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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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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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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 PeerServer.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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#include <map>
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#include <vector>
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#include <set>
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#include <memory>
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#include <utility>
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#include <thread>
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#include <libethcore/CommonEth.h>
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#include "PeerNetwork.h"
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namespace ba = boost::asio;
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namespace bi = boost::asio::ip;
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namespace eth
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{
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class PeerServer
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{
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friend class PeerSession;
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public:
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/// Start server, listening for connections on the given port.
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PeerServer(std::string const& _clientVersion, BlockChain const& _ch, unsigned int _networkId, unsigned short _port, NodeMode _m = NodeMode::Full, std::string const& _publicAddress = std::string(), bool _upnp = true);
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/// Start server, listening for connections on a system-assigned port.
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PeerServer(std::string const& _clientVersion, BlockChain const& _ch, unsigned int _networkId, NodeMode _m = NodeMode::Full, std::string const& _publicAddress = std::string(), bool _upnp = true);
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/// Start server, but don't listen.
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PeerServer(std::string const& _clientVersion, BlockChain const& _ch, unsigned int _networkId, NodeMode _m = NodeMode::Full);
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~PeerServer();
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static unsigned protocolVersion();
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unsigned networkId() { return m_networkId; }
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/// Connect to a peer explicitly.
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void connect(std::string const& _addr, unsigned short _port = 30303) noexcept;
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void connect(bi::tcp::endpoint const& _ep);
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/// Sync with the BlockChain. It might contain one of our mined blocks, we might have new candidates from the network.
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bool sync(BlockChain& _bc, TransactionQueue&, OverlayDB& _o);
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bool sync();
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/// Conduct I/O, polling, syncing, whatever.
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/// Ideally all time-consuming I/O is done in a background thread or otherwise asynchronously, but you get this call every 100ms or so anyway.
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/// This won't touch alter the blockchain.
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void process() { if (isInitialised()) m_ioService.poll(); }
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/// Set ideal number of peers.
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void setIdealPeerCount(unsigned _n) { m_idealPeerCount = _n; }
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void setMode(NodeMode _m) { m_mode = _m; }
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/// Get peer information.
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std::vector<PeerInfo> peers(bool _updatePing = false) const;
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/// Get number of peers connected; equivalent to, but faster than, peers().size().
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size_t peerCount() const { return m_peers.size(); }
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/// Ping the peers, to update the latency information.
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void pingAll();
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/// Get the port we're listening on currently.
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unsigned short listenPort() const { return m_public.port(); }
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bytes savePeers() const;
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void restorePeers(bytesConstRef _b);
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private:
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void seal(bytes& _b);
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void populateAddresses();
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void determinePublic(std::string const& _publicAddress, bool _upnp);
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void ensureAccepting();
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/// Check to see if the network peer-state initialisation has happened.
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bool isInitialised() const { return m_latestBlockSent; }
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/// Initialises the network peer-state, doing the stuff that needs to be once-only. @returns true if it really was first.
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bool ensureInitialised(BlockChain& _bc, TransactionQueue& _tq);
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std::map<Public, bi::tcp::endpoint> potentialPeers();
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std::string m_clientVersion;
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NodeMode m_mode = NodeMode::Full;
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unsigned short m_listenPort;
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BlockChain const* m_chain = nullptr;
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ba::io_service m_ioService;
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bi::tcp::acceptor m_acceptor;
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bi::tcp::socket m_socket;
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UPnP* m_upnp = nullptr;
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bi::tcp::endpoint m_public;
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KeyPair m_key;
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unsigned m_networkId;
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std::map<Public, std::weak_ptr<PeerSession>> m_peers;
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std::vector<bytes> m_incomingTransactions;
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std::vector<bytes> m_incomingBlocks;
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std::vector<bytes> m_unknownParentBlocks;
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std::vector<Public> m_freePeers;
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std::map<Public, std::pair<bi::tcp::endpoint, unsigned>> m_incomingPeers;
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h256 m_latestBlockSent;
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std::set<h256> m_transactionsSent;
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std::chrono::steady_clock::time_point m_lastPeersRequest;
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unsigned m_idealPeerCount = 5;
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std::vector<bi::address_v4> m_addresses;
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std::vector<bi::address_v4> m_peerAddresses;
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bool m_accepting = false;
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};
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}
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