Gav Wood
11 years ago
8 changed files with 1155 additions and 1238 deletions
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/*
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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 PeerNetwork.cpp
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* @authors: |
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* Gav Wood <i@gavwood.com> |
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* Eric Lombrozo <elombrozo@gmail.com> |
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* @date 2014 |
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*/ |
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#include "PeerServer.h" |
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#include <sys/types.h> |
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#ifdef _WIN32 |
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// winsock is already included
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// #include <winsock.h>
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#else |
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#include <ifaddrs.h> |
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#endif |
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#include <set> |
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#include <chrono> |
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#include <thread> |
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#include "Exceptions.h" |
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#include "Common.h" |
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#include "BlockChain.h" |
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#include "BlockInfo.h" |
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#include "TransactionQueue.h" |
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#include "UPnP.h" |
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#include "PeerSession.h" |
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using namespace std; |
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using namespace eth; |
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// Addresses we will skip during network interface discovery
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// Use a vector as the list is small
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// Why this and not names?
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// Under MacOSX loopback (127.0.0.1) can be named lo0 and br0 are bridges (0.0.0.0)
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static const set<bi::address> c_rejectAddresses = { |
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{bi::address_v4::from_string("127.0.0.1")}, |
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{bi::address_v6::from_string("::1")}, |
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{bi::address_v4::from_string("0.0.0.0")}, |
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{bi::address_v6::from_string("::")} |
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}; |
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PeerServer::PeerServer(std::string const& _clientVersion, BlockChain const& _ch, uint _networkId, unsigned short _port, NodeMode _m, string const& _publicAddress, bool _upnp): |
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m_clientVersion(_clientVersion), |
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m_mode(_m), |
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m_listenPort(_port), |
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m_chain(&_ch), |
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m_acceptor(m_ioService, bi::tcp::endpoint(bi::tcp::v4(), _port)), |
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m_socket(m_ioService), |
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m_key(KeyPair::create()), |
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m_networkId(_networkId) |
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{ |
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populateAddresses(); |
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determinePublic(_publicAddress, _upnp); |
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ensureAccepting(); |
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clog(NetNote) << "Id:" << asHex(m_key.address().ref().cropped(0, 4)) << "Mode: " << (_m == NodeMode::PeerServer ? "PeerServer" : "Full"); |
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} |
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PeerServer::PeerServer(std::string const& _clientVersion, uint _networkId, NodeMode _m): |
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m_clientVersion(_clientVersion), |
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m_mode(_m), |
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m_listenPort(0), |
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m_acceptor(m_ioService, bi::tcp::endpoint(bi::tcp::v4(), 0)), |
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m_socket(m_ioService), |
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m_key(KeyPair::create()), |
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m_networkId(_networkId) |
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{ |
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// populate addresses.
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populateAddresses(); |
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clog(NetNote) << "Id:" << asHex(m_key.address().ref().cropped(0, 4)) << "Mode: " << (m_mode == NodeMode::PeerServer ? "PeerServer" : "Full"); |
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} |
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PeerServer::~PeerServer() |
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{ |
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for (auto const& i: m_peers) |
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if (auto p = i.second.lock()) |
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p->disconnect(ClientQuit); |
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delete m_upnp; |
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} |
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unsigned PeerServer::protocolVersion() |
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{ |
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return 8; |
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} |
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void PeerServer::determinePublic(string const& _publicAddress, bool _upnp) |
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{ |
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if (_upnp) |
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try |
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{ |
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m_upnp = new UPnP; |
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} |
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catch (NoUPnPDevice) {} // let m_upnp continue as null - we handle it properly.
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bi::tcp::resolver r(m_ioService); |
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if (m_upnp && m_upnp->isValid() && m_peerAddresses.size()) |
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{ |
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clog(NetNote) << "External addr: " << m_upnp->externalIP(); |
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int p = m_upnp->addRedirect(m_peerAddresses[0].to_string().c_str(), m_listenPort); |
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if (p) |
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clog(NetNote) << "Punched through NAT and mapped local port" << m_listenPort << "onto external port" << p << "."; |
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else |
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{ |
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// couldn't map
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clog(NetWarn) << "Couldn't punch through NAT (or no NAT in place). Assuming " << m_listenPort << " is local & external port."; |
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p = m_listenPort; |
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} |
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auto eip = m_upnp->externalIP(); |
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if (eip == string("0.0.0.0") && _publicAddress.empty()) |
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m_public = bi::tcp::endpoint(bi::address(), (unsigned short)p); |
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else |
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{ |
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m_public = bi::tcp::endpoint(bi::address::from_string(_publicAddress.empty() ? eip : _publicAddress), (unsigned short)p); |
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m_addresses.push_back(m_public.address().to_v4()); |
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} |
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} |
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else |
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{ |
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// No UPnP - fallback on given public address or, if empty, the assumed peer address.
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m_public = bi::tcp::endpoint(_publicAddress.size() ? bi::address::from_string(_publicAddress) |
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: m_peerAddresses.size() ? m_peerAddresses[0] |
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: bi::address(), m_listenPort); |
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m_addresses.push_back(m_public.address().to_v4()); |
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} |
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} |
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void PeerServer::populateAddresses() |
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{ |
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#ifdef _WIN32 |
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WSAData wsaData; |
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if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) |
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throw NoNetworking(); |
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char ac[80]; |
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if (gethostname(ac, sizeof(ac)) == SOCKET_ERROR) |
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{ |
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clog(NetWarn) << "Error " << WSAGetLastError() << " when getting local host name."; |
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WSACleanup(); |
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throw NoNetworking(); |
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} |
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struct hostent* phe = gethostbyname(ac); |
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if (phe == 0) |
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{ |
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clog(NetWarn) << "Bad host lookup."; |
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WSACleanup(); |
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throw NoNetworking(); |
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} |
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for (int i = 0; phe->h_addr_list[i] != 0; ++i) |
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{ |
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struct in_addr addr; |
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memcpy(&addr, phe->h_addr_list[i], sizeof(struct in_addr)); |
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char *addrStr = inet_ntoa(addr); |
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bi::address ad(bi::address::from_string(addrStr)); |
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m_addresses.push_back(ad.to_v4()); |
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bool isLocal = std::find(c_rejectAddresses.begin(), c_rejectAddresses.end(), ad) != c_rejectAddresses.end(); |
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if (!isLocal) |
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m_peerAddresses.push_back(ad.to_v4()); |
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clog(NetNote) << "Address: " << ac << " = " << m_addresses.back() << (isLocal ? " [LOCAL]" : " [PEER]"); |
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} |
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WSACleanup(); |
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#else |
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ifaddrs* ifaddr; |
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if (getifaddrs(&ifaddr) == -1) |
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throw NoNetworking(); |
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bi::tcp::resolver r(m_ioService); |
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for (ifaddrs* ifa = ifaddr; ifa; ifa = ifa->ifa_next) |
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{ |
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if (!ifa->ifa_addr) |
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continue; |
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if (ifa->ifa_addr->sa_family == AF_INET) |
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{ |
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char host[NI_MAXHOST]; |
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if (getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST)) |
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continue; |
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// TODO: Make exception safe when no internet.
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auto it = r.resolve({host, "30303"}); |
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bi::tcp::endpoint ep = it->endpoint(); |
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bi::address ad = ep.address(); |
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m_addresses.push_back(ad.to_v4()); |
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bool isLocal = std::find(c_rejectAddresses.begin(), c_rejectAddresses.end(), ad) != c_rejectAddresses.end(); |
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if (!isLocal) |
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m_peerAddresses.push_back(ad.to_v4()); |
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clog(NetNote) << "Address: " << host << " = " << m_addresses.back() << (isLocal ? " [LOCAL]" : " [PEER]"); |
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} |
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} |
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freeifaddrs(ifaddr); |
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#endif |
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} |
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std::map<Public, bi::tcp::endpoint> PeerServer::potentialPeers() |
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{ |
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std::map<Public, bi::tcp::endpoint> ret; |
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if (!m_public.address().is_unspecified()) |
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ret.insert(make_pair(m_key.pub(), m_public)); |
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for (auto i: m_peers) |
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if (auto j = i.second.lock()) |
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{ |
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auto ep = j->endpoint(); |
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// Skip peers with a listen port of zero or are on a private network
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bool peerOnNet = (j->m_listenPort != 0 && !isPrivateAddress(ep.address())); |
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if (peerOnNet && ep.port() && j->m_id) |
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ret.insert(make_pair(i.first, ep)); |
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} |
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return ret; |
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} |
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void PeerServer::ensureAccepting() |
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{ |
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if (m_accepting == false) |
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{ |
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clog(NetNote) << "Listening on local port " << m_listenPort << " (public: " << m_public << ")"; |
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m_accepting = true; |
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m_acceptor.async_accept(m_socket, [=](boost::system::error_code ec) |
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{ |
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if (!ec) |
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try |
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{ |
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try { |
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clog(NetNote) << "Accepted connection from " << m_socket.remote_endpoint(); |
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} catch (...){} |
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bi::address remoteAddress = m_socket.remote_endpoint().address(); |
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// Port defaults to 0 - we let the hello tell us which port the peer listens to
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auto p = std::make_shared<PeerSession>(this, std::move(m_socket), m_networkId, remoteAddress); |
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p->start(); |
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} |
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catch (std::exception const& _e) |
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{ |
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clog(NetWarn) << "ERROR: " << _e.what(); |
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} |
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m_accepting = false; |
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if (ec.value() != 1 && (m_mode == NodeMode::PeerServer || m_peers.size() < m_idealPeerCount * 2)) |
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ensureAccepting(); |
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}); |
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} |
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} |
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void PeerServer::connect(std::string const& _addr, unsigned short _port) noexcept |
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{ |
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try |
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{ |
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connect(bi::tcp::endpoint(bi::address::from_string(_addr), _port)); |
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} |
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catch (exception const& e) |
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{ |
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// Couldn't connect
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clog(NetNote) << "Bad host " << _addr << " (" << e.what() << ")"; |
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} |
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} |
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void PeerServer::connect(bi::tcp::endpoint const& _ep) |
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{ |
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clog(NetNote) << "Attempting connection to " << _ep; |
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bi::tcp::socket* s = new bi::tcp::socket(m_ioService); |
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s->async_connect(_ep, [=](boost::system::error_code const& ec) |
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{ |
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if (ec) |
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{ |
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clog(NetNote) << "Connection refused to " << _ep << " (" << ec.message() << ")"; |
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for (auto i = m_incomingPeers.begin(); i != m_incomingPeers.end(); ++i) |
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if (i->second.first == _ep && i->second.second < 3) |
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{ |
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m_freePeers.push_back(i->first); |
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goto OK; |
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} |
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// for-else
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clog(NetNote) << "Giving up."; |
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OK:; |
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} |
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else |
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{ |
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auto p = make_shared<PeerSession>(this, std::move(*s), m_networkId, _ep.address(), _ep.port()); |
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clog(NetNote) << "Connected to " << _ep; |
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p->start(); |
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} |
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delete s; |
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}); |
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} |
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bool PeerServer::sync() |
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{ |
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bool ret = false; |
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if (isInitialised()) |
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for (auto i = m_peers.begin(); i != m_peers.end();) |
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{ |
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auto p = i->second.lock(); |
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if (p && p->m_socket.is_open() && |
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(p->m_disconnect == chrono::steady_clock::time_point::max() || chrono::steady_clock::now() - p->m_disconnect < chrono::seconds(1))) // kill old peers that should be disconnected.
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++i; |
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else |
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{ |
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i = m_peers.erase(i); |
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ret = true; |
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} |
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} |
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return ret; |
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} |
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bool PeerServer::ensureInitialised(BlockChain& _bc, TransactionQueue& _tq) |
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{ |
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if (m_latestBlockSent == h256()) |
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{ |
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// First time - just initialise.
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m_latestBlockSent = _bc.currentHash(); |
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clog(NetNote) << "Initialising: latest=" << m_latestBlockSent; |
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for (auto const& i: _tq.transactions()) |
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m_transactionsSent.insert(i.first); |
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m_lastPeersRequest = chrono::steady_clock::time_point::min(); |
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return true; |
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} |
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return false; |
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} |
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bool PeerServer::sync(BlockChain& _bc, TransactionQueue& _tq, Overlay& _o) |
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{ |
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bool ret = ensureInitialised(_bc, _tq); |
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if (sync()) |
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ret = true; |
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if (m_mode == NodeMode::Full) |
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{ |
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for (auto it = m_incomingTransactions.begin(); it != m_incomingTransactions.end(); ++it) |
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if (_tq.import(*it)) |
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{}//ret = true; // just putting a transaction in the queue isn't enough to change the state - it might have an invalid nonce...
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else |
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m_transactionsSent.insert(sha3(*it)); // if we already had the transaction, then don't bother sending it on.
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m_incomingTransactions.clear(); |
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auto h = _bc.currentHash(); |
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bool resendAll = (h != m_latestBlockSent); |
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// Send any new transactions.
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for (auto j: m_peers) |
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if (auto p = j.second.lock()) |
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{ |
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bytes b; |
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uint n = 0; |
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for (auto const& i: _tq.transactions()) |
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if ((!m_transactionsSent.count(i.first) && !p->m_knownTransactions.count(i.first)) || p->m_requireTransactions || resendAll) |
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{ |
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b += i.second; |
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++n; |
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m_transactionsSent.insert(i.first); |
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} |
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if (n) |
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{ |
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RLPStream ts; |
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PeerSession::prep(ts); |
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ts.appendList(n + 1) << TransactionsPacket; |
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ts.appendRaw(b, n).swapOut(b); |
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seal(b); |
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p->send(&b); |
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} |
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p->m_knownTransactions.clear(); |
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p->m_requireTransactions = false; |
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} |
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// Send any new blocks.
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if (h != m_latestBlockSent) |
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{ |
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// TODO: find where they diverge and send complete new branch.
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RLPStream ts; |
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PeerSession::prep(ts); |
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ts.appendList(2) << BlocksPacket; |
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bytes b; |
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ts.appendRaw(_bc.block(_bc.currentHash())).swapOut(b); |
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seal(b); |
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for (auto j: m_peers) |
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if (auto p = j.second.lock()) |
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{ |
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if (!p->m_knownBlocks.count(_bc.currentHash())) |
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p->send(&b); |
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p->m_knownBlocks.clear(); |
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} |
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} |
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m_latestBlockSent = h; |
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for (int accepted = 1, n = 0; accepted; ++n) |
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{ |
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accepted = 0; |
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if (m_incomingBlocks.size()) |
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for (auto it = prev(m_incomingBlocks.end());; --it) |
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{ |
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try |
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{ |
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_bc.import(*it, _o); |
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it = m_incomingBlocks.erase(it); |
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++accepted; |
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ret = true; |
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} |
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catch (UnknownParent) |
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{ |
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// Don't (yet) know its parent. Leave it for later.
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m_unknownParentBlocks.push_back(*it); |
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it = m_incomingBlocks.erase(it); |
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} |
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catch (...) |
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{ |
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// Some other error - erase it.
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it = m_incomingBlocks.erase(it); |
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} |
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if (it == m_incomingBlocks.begin()) |
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break; |
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} |
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if (!n && accepted) |
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{ |
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for (auto i: m_unknownParentBlocks) |
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m_incomingBlocks.push_back(i); |
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m_unknownParentBlocks.clear(); |
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} |
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} |
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// Connect to additional peers
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while (m_peers.size() < m_idealPeerCount) |
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{ |
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if (m_freePeers.empty()) |
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{ |
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if (chrono::steady_clock::now() > m_lastPeersRequest + chrono::seconds(10)) |
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{ |
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RLPStream s; |
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bytes b; |
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(PeerSession::prep(s).appendList(1) << GetPeersPacket).swapOut(b); |
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seal(b); |
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for (auto const& i: m_peers) |
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if (auto p = i.second.lock()) |
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if (p->isOpen()) |
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p->send(&b); |
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m_lastPeersRequest = chrono::steady_clock::now(); |
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} |
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if (!m_accepting) |
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ensureAccepting(); |
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break; |
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} |
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auto x = time(0) % m_freePeers.size(); |
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m_incomingPeers[m_freePeers[x]].second++; |
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connect(m_incomingPeers[m_freePeers[x]].first); |
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m_freePeers.erase(m_freePeers.begin() + x); |
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} |
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} |
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|
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// platform for consensus of social contract.
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// restricts your freedom but does so fairly. and that's the value proposition.
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// guarantees that everyone else respect the rules of the system. (i.e. obeys laws).
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// We'll keep at most twice as many as is ideal, halfing what counts as "too young to kill" until we get there.
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for (uint old = 15000; m_peers.size() > m_idealPeerCount * 2 && old > 100; old /= 2) |
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while (m_peers.size() > m_idealPeerCount) |
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{ |
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// look for worst peer to kick off
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// first work out how many are old enough to kick off.
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shared_ptr<PeerSession> worst; |
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unsigned agedPeers = 0; |
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for (auto i: m_peers) |
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if (auto p = i.second.lock()) |
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if ((m_mode != NodeMode::PeerServer || p->m_caps != 0x01) && chrono::steady_clock::now() > p->m_connect + chrono::milliseconds(old)) // don't throw off new peers; peer-servers should never kick off other peer-servers.
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{ |
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++agedPeers; |
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if ((!worst || p->m_rating < worst->m_rating || (p->m_rating == worst->m_rating && p->m_connect > worst->m_connect))) // kill older ones
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worst = p; |
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} |
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if (!worst || agedPeers <= m_idealPeerCount) |
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break; |
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worst->disconnect(TooManyPeers); |
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} |
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return ret; |
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} |
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std::vector<PeerInfo> PeerServer::peers() const |
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{ |
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const_cast<PeerServer*>(this)->pingAll(); |
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this_thread::sleep_for(chrono::milliseconds(200)); |
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std::vector<PeerInfo> ret; |
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for (auto& i: m_peers) |
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if (auto j = i.second.lock()) |
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if (j->m_socket.is_open()) |
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ret.push_back(j->m_info); |
|||
return ret; |
|||
} |
|||
|
|||
void PeerServer::pingAll() |
|||
{ |
|||
for (auto& i: m_peers) |
|||
if (auto j = i.second.lock()) |
|||
j->ping(); |
|||
} |
|||
|
|||
bytes PeerServer::savePeers() const |
|||
{ |
|||
RLPStream ret; |
|||
int n = 0; |
|||
for (auto& i: m_peers) |
|||
if (auto p = i.second.lock()) |
|||
if (p->m_socket.is_open() && p->endpoint().port()) |
|||
{ |
|||
ret.appendList(3) << p->endpoint().address().to_v4().to_bytes() << p->endpoint().port() << p->m_id; |
|||
n++; |
|||
} |
|||
return RLPStream(n).appendRaw(ret.out(), n).out(); |
|||
} |
|||
|
|||
void PeerServer::restorePeers(bytesConstRef _b) |
|||
{ |
|||
for (auto i: RLP(_b)) |
|||
{ |
|||
auto k = (Public)i[2]; |
|||
if (!m_incomingPeers.count(k)) |
|||
{ |
|||
m_incomingPeers.insert(make_pair(k, make_pair(bi::tcp::endpoint(bi::address_v4(i[0].toArray<byte, 4>()), i[1].toInt<short>()), 0))); |
|||
m_freePeers.push_back(k); |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,585 @@ |
|||
/*
|
|||
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/>.
|
|||
*/ |
|||
/** @file PeerSession.cpp
|
|||
* @author Gav Wood <i@gavwood.com> |
|||
* @date 2014 |
|||
*/ |
|||
|
|||
#include "PeerSession.h" |
|||
|
|||
#include <chrono> |
|||
#include "Exceptions.h" |
|||
#include "Common.h" |
|||
#include "BlockChain.h" |
|||
#include "BlockInfo.h" |
|||
#include "PeerServer.h" |
|||
using namespace std; |
|||
using namespace eth; |
|||
|
|||
#define clogS(X) eth::LogOutputStream<X, true>(false) << "| " << std::setw(2) << m_socket.native_handle() << "] " |
|||
|
|||
static const eth::uint c_maxHashes = 32; ///< Maximum number of hashes GetChain will ever send.
|
|||
static const eth::uint c_maxBlocks = 32; ///< Maximum number of blocks Blocks will ever send. BUG: if this gets too big (e.g. 2048) stuff starts going wrong.
|
|||
static const eth::uint c_maxBlocksAsk = 256; ///< Maximum number of blocks we ask to receive in Blocks (when using GetChain).
|
|||
|
|||
PeerSession::PeerSession(PeerServer* _s, bi::tcp::socket _socket, uint _rNId, bi::address _peerAddress, unsigned short _peerPort): |
|||
m_server(_s), |
|||
m_socket(std::move(_socket)), |
|||
m_reqNetworkId(_rNId), |
|||
m_listenPort(_peerPort), |
|||
m_rating(0) |
|||
{ |
|||
m_disconnect = std::chrono::steady_clock::time_point::max(); |
|||
m_connect = std::chrono::steady_clock::now(); |
|||
m_info = PeerInfo({"?", _peerAddress.to_string(), m_listenPort, std::chrono::steady_clock::duration(0)}); |
|||
} |
|||
|
|||
PeerSession::~PeerSession() |
|||
{ |
|||
m_socket.close(); |
|||
} |
|||
|
|||
bi::tcp::endpoint PeerSession::endpoint() const |
|||
{ |
|||
if (m_socket.is_open()) |
|||
try { |
|||
return bi::tcp::endpoint(m_socket.remote_endpoint().address(), m_listenPort); |
|||
} catch (...){} |
|||
|
|||
return bi::tcp::endpoint(); |
|||
} |
|||
|
|||
// TODO: BUG! 256 -> work out why things start to break with big packet sizes -> g.t. ~370 blocks.
|
|||
|
|||
bool PeerSession::interpret(RLP const& _r) |
|||
{ |
|||
clogS(NetRight) << _r; |
|||
switch (_r[0].toInt<unsigned>()) |
|||
{ |
|||
case HelloPacket: |
|||
{ |
|||
m_protocolVersion = _r[1].toInt<uint>(); |
|||
m_networkId = _r[2].toInt<uint>(); |
|||
auto clientVersion = _r[3].toString(); |
|||
m_caps = _r[4].toInt<uint>(); |
|||
m_listenPort = _r[5].toInt<unsigned short>(); |
|||
m_id = _r[6].toHash<h512>(); |
|||
|
|||
clogS(NetMessageSummary) << "Hello: " << clientVersion << "V[" << m_protocolVersion << "/" << m_networkId << "]" << m_id.abridged() << showbase << hex << m_caps << dec << m_listenPort; |
|||
|
|||
if (m_server->m_peers.count(m_id)) |
|||
if (auto l = m_server->m_peers[m_id].lock()) |
|||
if (l.get() != this && l->isOpen()) |
|||
{ |
|||
// Already connected.
|
|||
cwarn << "Already have peer id" << m_id.abridged() << "at" << l->endpoint() << "rather than" << endpoint(); |
|||
disconnect(DuplicatePeer); |
|||
return false; |
|||
} |
|||
|
|||
if (m_protocolVersion != PeerServer::protocolVersion() || m_networkId != m_server->networkId() || !m_id) |
|||
{ |
|||
disconnect(IncompatibleProtocol); |
|||
return false; |
|||
} |
|||
try |
|||
{ m_info = PeerInfo({clientVersion, m_socket.remote_endpoint().address().to_string(), m_listenPort, std::chrono::steady_clock::duration()}); } |
|||
catch (...) |
|||
{ |
|||
disconnect(BadProtocol); |
|||
return false; |
|||
} |
|||
|
|||
m_server->m_peers[m_id] = shared_from_this(); |
|||
|
|||
// Grab their block chain off them.
|
|||
{ |
|||
clogS(NetAllDetail) << "Want chain. Latest:" << m_server->m_latestBlockSent << ", number:" << m_server->m_chain->details(m_server->m_latestBlockSent).number; |
|||
uint count = std::min(c_maxHashes, m_server->m_chain->details(m_server->m_latestBlockSent).number + 1); |
|||
RLPStream s; |
|||
prep(s).appendList(2 + count); |
|||
s << GetChainPacket; |
|||
auto h = m_server->m_latestBlockSent; |
|||
for (uint i = 0; i < count; ++i, h = m_server->m_chain->details(h).parent) |
|||
{ |
|||
clogS(NetAllDetail) << " " << i << ":" << h; |
|||
s << h; |
|||
} |
|||
|
|||
s << c_maxBlocksAsk; |
|||
sealAndSend(s); |
|||
s.clear(); |
|||
prep(s).appendList(1); |
|||
s << GetTransactionsPacket; |
|||
sealAndSend(s); |
|||
} |
|||
break; |
|||
} |
|||
case DisconnectPacket: |
|||
{ |
|||
string reason = "Unspecified"; |
|||
if (_r[1].isInt()) |
|||
reason = reasonOf((DisconnectReason)_r[1].toInt<int>()); |
|||
|
|||
clogS(NetMessageSummary) << "Disconnect (reason: " << reason << ")"; |
|||
if (m_socket.is_open()) |
|||
clogS(NetNote) << "Closing " << m_socket.remote_endpoint(); |
|||
else |
|||
clogS(NetNote) << "Remote closed."; |
|||
m_socket.close(); |
|||
return false; |
|||
} |
|||
case PingPacket: |
|||
{ |
|||
// clogS(NetMessageSummary) << "Ping";
|
|||
RLPStream s; |
|||
sealAndSend(prep(s).appendList(1) << PongPacket); |
|||
break; |
|||
} |
|||
case PongPacket: |
|||
m_info.lastPing = std::chrono::steady_clock::now() - m_ping; |
|||
// clogS(NetMessageSummary) << "Latency: " << chrono::duration_cast<chrono::milliseconds>(m_lastPing).count() << " ms";
|
|||
break; |
|||
case GetPeersPacket: |
|||
{ |
|||
clogS(NetMessageSummary) << "GetPeers"; |
|||
auto peers = m_server->potentialPeers(); |
|||
RLPStream s; |
|||
prep(s).appendList(peers.size() + 1); |
|||
s << PeersPacket; |
|||
for (auto i: peers) |
|||
{ |
|||
clogS(NetMessageDetail) << "Sending peer " << asHex(i.first.ref().cropped(0, 4)) << i.second; |
|||
s.appendList(3) << i.second.address().to_v4().to_bytes() << i.second.port() << i.first; |
|||
} |
|||
sealAndSend(s); |
|||
break; |
|||
} |
|||
case PeersPacket: |
|||
clogS(NetMessageSummary) << "Peers (" << dec << (_r.itemCount() - 1) << " entries)"; |
|||
for (unsigned i = 1; i < _r.itemCount(); ++i) |
|||
{ |
|||
bi::address_v4 peerAddress(_r[i][0].toArray<byte, 4>()); |
|||
auto ep = bi::tcp::endpoint(peerAddress, _r[i][1].toInt<short>()); |
|||
Public id = _r[i][2].toHash<Public>(); |
|||
if (isPrivateAddress(peerAddress)) |
|||
goto CONTINUE; |
|||
|
|||
clogS(NetAllDetail) << "Checking: " << ep << "(" << asHex(id.ref().cropped(0, 4)) << ")"; |
|||
|
|||
// check that it's not us or one we already know:
|
|||
if (id && (m_server->m_key.pub() == id || m_server->m_peers.count(id) || m_server->m_incomingPeers.count(id))) |
|||
goto CONTINUE; |
|||
|
|||
// check that we're not already connected to addr:
|
|||
if (!ep.port()) |
|||
goto CONTINUE; |
|||
for (auto i: m_server->m_addresses) |
|||
if (ep.address() == i && ep.port() == m_server->listenPort()) |
|||
goto CONTINUE; |
|||
for (auto i: m_server->m_peers) |
|||
if (shared_ptr<PeerSession> p = i.second.lock()) |
|||
{ |
|||
clogS(NetAllDetail) << " ...against " << p->endpoint(); |
|||
if (p->m_socket.is_open() && p->endpoint() == ep) |
|||
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); |
|||
clogS(NetMessageDetail) << "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 BlocksPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
clogS(NetMessageSummary) << "Blocks (" << dec << (_r.itemCount() - 1) << " entries)"; |
|||
unsigned used = 0; |
|||
for (unsigned i = 1; i < _r.itemCount(); ++i) |
|||
{ |
|||
auto h = sha3(_r[i].data()); |
|||
if (!m_server->m_chain->details(h)) |
|||
{ |
|||
m_server->m_incomingBlocks.push_back(_r[i].data().toBytes()); |
|||
m_knownBlocks.insert(h); |
|||
used++; |
|||
} |
|||
} |
|||
m_rating += used; |
|||
if (g_logVerbosity >= 3) |
|||
for (unsigned i = 1; i < _r.itemCount(); ++i) |
|||
{ |
|||
auto h = sha3(_r[i].data()); |
|||
BlockInfo bi(_r[i].data()); |
|||
if (!m_server->m_chain->details(bi.parentHash) && !m_knownBlocks.count(bi.parentHash)) |
|||
clogS(NetMessageDetail) << "Unknown parent " << bi.parentHash << " of block " << h; |
|||
else |
|||
clogS(NetMessageDetail) << "Known parent " << bi.parentHash << " of block " << h; |
|||
} |
|||
if (used) // we received some - check if there's any more
|
|||
{ |
|||
RLPStream s; |
|||
prep(s).appendList(3); |
|||
s << GetChainPacket; |
|||
s << sha3(_r[1].data()); |
|||
s << c_maxBlocksAsk; |
|||
sealAndSend(s); |
|||
} |
|||
break; |
|||
} |
|||
case GetChainPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
clogS(NetMessageSummary) << "GetChain (" << (_r.itemCount() - 2) << " hashes, " << (_r[_r.itemCount() - 1].toInt<bigint>()) << ")"; |
|||
// ********************************************************************
|
|||
// NEEDS FULL REWRITE!
|
|||
h256s parents; |
|||
parents.reserve(_r.itemCount() - 2); |
|||
for (unsigned i = 1; i < _r.itemCount() - 1; ++i) |
|||
parents.push_back(_r[i].toHash<h256>()); |
|||
if (_r.itemCount() == 2) |
|||
break; |
|||
// return 2048 block max.
|
|||
uint baseCount = (uint)min<bigint>(_r[_r.itemCount() - 1].toInt<bigint>(), c_maxBlocks); |
|||
clogS(NetMessageSummary) << "GetChain (" << baseCount << " max, from " << parents.front() << " to " << parents.back() << ")"; |
|||
for (auto parent: parents) |
|||
{ |
|||
auto h = m_server->m_chain->currentHash(); |
|||
h256 latest = m_server->m_chain->currentHash(); |
|||
uint latestNumber = 0; |
|||
uint parentNumber = 0; |
|||
RLPStream s; |
|||
|
|||
if (m_server->m_chain->details(parent)) |
|||
{ |
|||
latestNumber = m_server->m_chain->details(latest).number; |
|||
parentNumber = m_server->m_chain->details(parent).number; |
|||
uint count = min<uint>(latestNumber - parentNumber, baseCount); |
|||
clogS(NetAllDetail) << "Requires " << dec << (latestNumber - parentNumber) << " blocks from " << latestNumber << " to " << parentNumber; |
|||
clogS(NetAllDetail) << latest << " - " << parent; |
|||
|
|||
prep(s); |
|||
s.appendList(1 + count) << BlocksPacket; |
|||
uint endNumber = m_server->m_chain->details(parent).number; |
|||
uint startNumber = endNumber + count; |
|||
clogS(NetAllDetail) << "Sending " << dec << count << " blocks from " << startNumber << " to " << endNumber; |
|||
|
|||
uint n = latestNumber; |
|||
for (; n > startNumber; n--, h = m_server->m_chain->details(h).parent) {} |
|||
for (uint i = 0; i < count; ++i, --n, h = m_server->m_chain->details(h).parent) |
|||
{ |
|||
if (h == parent || n == endNumber) |
|||
{ |
|||
cwarn << "BUG! Couldn't create the reply for GetChain!"; |
|||
return true; |
|||
} |
|||
clogS(NetAllDetail) << " " << dec << i << " " << h; |
|||
s.appendRaw(m_server->m_chain->block(h)); |
|||
} |
|||
clogS(NetAllDetail) << "Parent: " << h; |
|||
} |
|||
else if (parent != parents.back()) |
|||
continue; |
|||
|
|||
if (h != parent) |
|||
{ |
|||
// not in the blockchain;
|
|||
if (parent == parents.back()) |
|||
{ |
|||
// out of parents...
|
|||
clogS(NetAllDetail) << "GetChain failed; not in chain"; |
|||
// No good - must have been on a different branch.
|
|||
s.clear(); |
|||
prep(s).appendList(2) << NotInChainPacket << parents.back(); |
|||
} |
|||
else |
|||
// still some parents left - try them.
|
|||
continue; |
|||
} |
|||
// send the packet (either Blocks or NotInChain) & exit.
|
|||
sealAndSend(s); |
|||
break; |
|||
// ********************************************************************
|
|||
} |
|||
break; |
|||
} |
|||
case NotInChainPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
h256 noGood = _r[1].toHash<h256>(); |
|||
clogS(NetMessageSummary) << "NotInChain (" << noGood << ")"; |
|||
if (noGood == m_server->m_chain->genesisHash()) |
|||
{ |
|||
clogS(NetWarn) << "Discordance over genesis block! Disconnect."; |
|||
disconnect(WrongGenesis); |
|||
} |
|||
else |
|||
{ |
|||
uint count = std::min(c_maxHashes, m_server->m_chain->details(noGood).number); |
|||
RLPStream s; |
|||
prep(s).appendList(2 + count); |
|||
s << GetChainPacket; |
|||
auto h = m_server->m_chain->details(noGood).parent; |
|||
for (uint i = 0; i < count; ++i, h = m_server->m_chain->details(h).parent) |
|||
s << h; |
|||
s << c_maxBlocksAsk; |
|||
sealAndSend(s); |
|||
} |
|||
break; |
|||
} |
|||
case GetTransactionsPacket: |
|||
{ |
|||
if (m_server->m_mode == NodeMode::PeerServer) |
|||
break; |
|||
m_requireTransactions = true; |
|||
break; |
|||
} |
|||
default: |
|||
break; |
|||
} |
|||
return true; |
|||
} |
|||
|
|||
void PeerSession::ping() |
|||
{ |
|||
RLPStream s; |
|||
sealAndSend(prep(s).appendList(1) << PingPacket); |
|||
m_ping = std::chrono::steady_clock::now(); |
|||
} |
|||
|
|||
RLPStream& PeerSession::prep(RLPStream& _s) |
|||
{ |
|||
return _s.appendRaw(bytes(8, 0)); |
|||
} |
|||
|
|||
void PeerServer::seal(bytes& _b) |
|||
{ |
|||
_b[0] = 0x22; |
|||
_b[1] = 0x40; |
|||
_b[2] = 0x08; |
|||
_b[3] = 0x91; |
|||
uint32_t len = (uint32_t)_b.size() - 8; |
|||
_b[4] = (len >> 24) & 0xff; |
|||
_b[5] = (len >> 16) & 0xff; |
|||
_b[6] = (len >> 8) & 0xff; |
|||
_b[7] = len & 0xff; |
|||
} |
|||
|
|||
void PeerSession::sealAndSend(RLPStream& _s) |
|||
{ |
|||
bytes b; |
|||
_s.swapOut(b); |
|||
m_server->seal(b); |
|||
sendDestroy(b); |
|||
} |
|||
|
|||
bool PeerSession::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 PeerSession::sendDestroy(bytes& _msg) |
|||
{ |
|||
clogS(NetLeft) << RLP(bytesConstRef(&_msg).cropped(8)); |
|||
|
|||
if (!checkPacket(bytesConstRef(&_msg))) |
|||
{ |
|||
cwarn << "INVALID PACKET CONSTRUCTED!"; |
|||
} |
|||
|
|||
auto self(shared_from_this()); |
|||
bytes* buffer = new bytes(std::move(_msg)); |
|||
ba::async_write(m_socket, ba::buffer(*buffer), [self, buffer](boost::system::error_code ec, std::size_t length) |
|||
{ |
|||
delete buffer; |
|||
if (ec) |
|||
{ |
|||
cwarn << "Error sending: " << ec.message(); |
|||
self->dropped(); |
|||
} |
|||
// cbug << length << " bytes written (EC: " << ec << ")";
|
|||
}); |
|||
} |
|||
|
|||
void PeerSession::send(bytesConstRef _msg) |
|||
{ |
|||
clogS(NetLeft) << RLP(_msg.cropped(8)); |
|||
|
|||
if (!checkPacket(_msg)) |
|||
{ |
|||
cwarn << "INVALID PACKET CONSTRUCTED!"; |
|||
} |
|||
|
|||
auto self(shared_from_this()); |
|||
bytes* buffer = new bytes(_msg.toBytes()); |
|||
ba::async_write(m_socket, ba::buffer(*buffer), [self, buffer](boost::system::error_code ec, std::size_t length) |
|||
{ |
|||
delete buffer; |
|||
if (ec) |
|||
{ |
|||
cwarn << "Error sending: " << ec.message(); |
|||
self->dropped(); |
|||
} |
|||
// cbug << length << " bytes written (EC: " << ec << ")";
|
|||
}); |
|||
} |
|||
|
|||
void PeerSession::dropped() |
|||
{ |
|||
if (m_socket.is_open()) |
|||
try { |
|||
clogS(NetNote) << "Closing " << m_socket.remote_endpoint(); |
|||
m_socket.close(); |
|||
}catch (...){} |
|||
for (auto i = m_server->m_peers.begin(); i != m_server->m_peers.end(); ++i) |
|||
if (i->second.lock().get() == this) |
|||
{ |
|||
m_server->m_peers.erase(i); |
|||
break; |
|||
} |
|||
} |
|||
|
|||
void PeerSession::disconnect(int _reason) |
|||
{ |
|||
clogS(NetNote) << "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 PeerSession::start() |
|||
{ |
|||
RLPStream s; |
|||
prep(s); |
|||
s.appendList(7) << HelloPacket << (uint)PeerServer::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(); |
|||
sealAndSend(s); |
|||
|
|||
ping(); |
|||
|
|||
doRead(); |
|||
} |
|||
|
|||
void PeerSession::doRead() |
|||
{ |
|||
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 (ec) |
|||
{ |
|||
cwarn << "Error reading: " << ec.message(); |
|||
dropped(); |
|||
} |
|||
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) |
|||
{ |
|||
clogS(NetWarn) << "Out of alignment."; |
|||
disconnect(BadProtocol); |
|||
return; |
|||
clogS(NetNote) << "Skipping: " << hex << showbase << (int)m_incoming[0] << dec; |
|||
memmove(m_incoming.data(), m_incoming.data() + 1, m_incoming.size() - 1); |
|||
m_incoming.resize(m_incoming.size() - 1); |
|||
} |
|||
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.
|
|||
// cerr << "Received " << len << ": " << asHex(bytesConstRef(m_incoming.data() + 8, len)) << endl;
|
|||
auto data = bytesConstRef(m_incoming.data(), tlen); |
|||
if (!checkPacket(data)) |
|||
{ |
|||
cerr << "Received " << len << ": " << asHex(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(); |
|||
} |
|||
} |
|||
}); |
|||
} |
|||
Loading…
Reference in new issue