WebThree.cpp

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/*
        This file is part of cpp-ethereum.

        cpp-ethereum is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        cpp-ethereum is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "WebThree.h"
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>
#include <libethereum/Defaults.h>
#include <libethereum/EthereumHost.h>
#include <libethereum/ClientTest.h>
#include <libethashseal/EthashClient.h>
#include "BuildInfo.h"
#include <libethashseal/Ethash.h>
using namespace std;
using namespace dev;
using namespace dev::p2p;
using namespace dev::eth;
using namespace dev::shh;

static_assert(BOOST_VERSION == 106300, "Wrong boost headers version");

WebThreeDirect::WebThreeDirect(
        std::string const& _clientVersion,
        std::string const& _dbPath,
        eth::ChainParams const& _params,
        WithExisting _we,
        std::set<std::string> const& _interfaces,
        NetworkPreferences const& _n,
        bytesConstRef _network,
        bool _testing
):
        m_clientVersion(_clientVersion),
        m_net(_clientVersion, _n, _network)
{
        if (_dbPath.size())
                Defaults::setDBPath(_dbPath);
        if (_interfaces.count("eth"))
        {
                Ethash::init();
                NoProof::init();
                if (_params.sealEngineName == "Ethash")
                        m_ethereum.reset(new eth::EthashClient(_params, (int)_params.u256Param("networkID"), &m_net, shared_ptr<GasPricer>(), _dbPath, _we));
                else if (_params.sealEngineName == "NoProof" && _testing)
                        m_ethereum.reset(new eth::ClientTest(_params, (int)_params.u256Param("networkID"), &m_net, shared_ptr<GasPricer>(), _dbPath, _we));
                else
                        m_ethereum.reset(new eth::Client(_params, (int)_params.u256Param("networkID"), &m_net, shared_ptr<GasPricer>(), _dbPath, _we));
                string bp = DEV_QUOTED(ETH_BUILD_PLATFORM);
                vector<string> bps;
                boost::split(bps, bp, boost::is_any_of("/"));
                bps[0] = bps[0].substr(0, 5);
                bps[1] = bps[1].substr(0, 3);
                bps.back() = bps.back().substr(0, 3);
                m_ethereum->setExtraData(rlpList(0, string(dev::Version) + "++" + string(DEV_QUOTED(ETH_COMMIT_HASH)).substr(0, 4) + (ETH_CLEAN_REPO ? "-" : "*") + string(DEV_QUOTED(ETH_BUILD_TYPE)).substr(0, 1) + boost::join(bps, "/")));
        }

        if (_interfaces.count("shh"))
                m_whisper = m_net.registerCapability(make_shared<WhisperHost>());
}

WebThreeDirect::~WebThreeDirect()
{
        // Utterly horrible right now - WebThree owns everything (good), but:
        // m_net (Host) owns the eth::EthereumHost via a shared_ptr.
        // The eth::EthereumHost depends on eth::Client (it maintains a reference to the BlockChain field of Client).
        // eth::Client (owned by us via a unique_ptr) uses eth::EthereumHost (via a weak_ptr).
        // Really need to work out a clean way of organising ownership and guaranteeing startup/shutdown is perfect.

        // Have to call stop here to get the Host to kill its io_service otherwise we end up with left-over reads,
        // still referencing Sessions getting deleted *after* m_ethereum is reset, causing bad things to happen, since
        // the guarantee is that m_ethereum is only reset *after* all sessions have ended (sessions are allowed to
        // use bits of data owned by m_ethereum).
        m_net.stop();
        m_ethereum.reset();
}

std::string WebThreeDirect::composeClientVersion(std::string const& _client)
{
        return _client + "/" + \
                "v" + dev::Version + "/" + \
		DEV_QUOTED(ETH_BUILD_OS) + "/" + \
		DEV_QUOTED(ETH_BUILD_COMPILER) + "/" + \
		DEV_QUOTED(ETH_BUILD_JIT_MODE) + "/" + \
		DEV_QUOTED(ETH_BUILD_TYPE) + "/" + \
                string(DEV_QUOTED(ETH_COMMIT_HASH)).substr(0, 8) + \
                (ETH_CLEAN_REPO ? "" : "*") + "/";
}

p2p::NetworkPreferences const& WebThreeDirect::networkPreferences() const
{
        return m_net.networkPreferences();
}

void WebThreeDirect::setNetworkPreferences(p2p::NetworkPreferences const& _n, bool _dropPeers)
{
        auto had = isNetworkStarted();
        if (had)
                stopNetwork();
        m_net.setNetworkPreferences(_n, _dropPeers);
        if (had)
                startNetwork();
}

std::vector<PeerSessionInfo> WebThreeDirect::peers()
{
        return m_net.peerSessionInfo();
}

size_t WebThreeDirect::peerCount() const
{
        return m_net.peerCount();
}

void WebThreeDirect::setIdealPeerCount(size_t _n)
{
        return m_net.setIdealPeerCount(_n);
}

void WebThreeDirect::setPeerStretch(size_t _n)
{
        return m_net.setPeerStretch(_n);
}

bytes WebThreeDirect::saveNetwork()
{
        return m_net.saveNetwork();
}

void WebThreeDirect::addNode(NodeID const& _node, bi::tcp::endpoint const& _host)
{
        m_net.addNode(_node, NodeIPEndpoint(_host.address(), _host.port(), _host.port()));
}

void WebThreeDirect::requirePeer(NodeID const& _node, bi::tcp::endpoint const& _host)
{
        m_net.requirePeer(_node, NodeIPEndpoint(_host.address(), _host.port(), _host.port()));
}

void WebThreeDirect::addPeer(NodeSpec const& _s, PeerType _t)
{
        m_net.addPeer(_s, _t);
}