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danicoin/src/p2p/net_node.cpp
Antonio Juarez ad291f5285 Bytecoin RPC Wallet
2015-05-27 13:28:09 +01:00

1336 lines
48 KiB
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// Copyright (c) 2012-2015, The CryptoNote developers, The Bytecoin developers
//
// This file is part of Bytecoin.
//
// Bytecoin is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Bytecoin 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Bytecoin. If not, see <http://www.gnu.org/licenses/>.
#include "net_node.h"
#include <algorithm>
#include <fstream>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/serialization/version.hpp>
#include <boost/uuid/random_generator.hpp>
#include <boost/uuid/uuid_io.hpp>
#include <miniupnpc/miniupnpc.h>
#include <miniupnpc/upnpcommands.h>
#include <System/EventLock.h>
#include <System/InterruptedException.h>
#include <System/Ipv4Address.h>
#include <System/Ipv4Resolver.h>
#include <System/LatchGuard.h>
#include <System/TcpListener.h>
#include <System/TcpConnector.h>
#include "version.h"
#include "Common/util.h"
#include "crypto/crypto.h"
#include "p2p_protocol_defs.h"
#include "net_peerlist_boost_serialization.h"
#include "connection_context.h"
#include "LevinProtocol.h"
using namespace Logging;
using namespace CryptoNote;
namespace {
size_t get_random_index_with_fixed_probability(size_t max_index) {
//divide by zero workaround
if (!max_index)
return 0;
size_t x = crypto::rand<size_t>() % (max_index + 1);
return (x*x*x) / (max_index*max_index); //parabola \/
}
void addPortMapping(Logging::LoggerRef& logger, uint32_t port) {
// Add UPnP port mapping
logger(INFO) << "Attempting to add IGD port mapping.";
int result;
UPNPDev* deviceList = upnpDiscover(1000, NULL, NULL, 0, 0, &result);
UPNPUrls urls;
IGDdatas igdData;
char lanAddress[64];
result = UPNP_GetValidIGD(deviceList, &urls, &igdData, lanAddress, sizeof lanAddress);
freeUPNPDevlist(deviceList);
if (result != 0) {
if (result == 1) {
std::ostringstream portString;
portString << port;
if (UPNP_AddPortMapping(urls.controlURL, igdData.first.servicetype, portString.str().c_str(),
portString.str().c_str(), lanAddress, CryptoNote::CRYPTONOTE_NAME, "TCP", 0, "0") != 0) {
logger(ERROR) << "UPNP_AddPortMapping failed.";
} else {
logger(INFO, BRIGHT_GREEN) << "Added IGD port mapping.";
}
} else if (result == 2) {
logger(INFO) << "IGD was found but reported as not connected.";
} else if (result == 3) {
logger(INFO) << "UPnP device was found but not recoginzed as IGD.";
} else {
logger(ERROR) << "UPNP_GetValidIGD returned an unknown result code.";
}
FreeUPNPUrls(&urls);
} else {
logger(INFO) << "No IGD was found.";
}
}
bool parse_peer_from_string(net_address& pe, const std::string& node_addr) {
return Common::parseIpAddressAndPort(pe.ip, pe.port, node_addr);
}
}
namespace CryptoNote
{
namespace
{
const command_line::arg_descriptor<std::string> arg_p2p_bind_ip = {"p2p-bind-ip", "Interface for p2p network protocol", "0.0.0.0"};
const command_line::arg_descriptor<std::string> arg_p2p_bind_port = {"p2p-bind-port", "Port for p2p network protocol", boost::to_string(CryptoNote::P2P_DEFAULT_PORT)};
const command_line::arg_descriptor<uint32_t> arg_p2p_external_port = {"p2p-external-port", "External port for p2p network protocol (if port forwarding used with NAT)", 0};
const command_line::arg_descriptor<bool> arg_p2p_allow_local_ip = {"allow-local-ip", "Allow local ip add to peer list, mostly in debug purposes"};
const command_line::arg_descriptor<std::vector<std::string> > arg_p2p_add_peer = {"add-peer", "Manually add peer to local peerlist"};
const command_line::arg_descriptor<std::vector<std::string> > arg_p2p_add_priority_node = {"add-priority-node", "Specify list of peers to connect to and attempt to keep the connection open"};
const command_line::arg_descriptor<std::vector<std::string> > arg_p2p_add_exclusive_node = {"add-exclusive-node", "Specify list of peers to connect to only."
" If this option is given the options add-priority-node and seed-node are ignored"};
const command_line::arg_descriptor<std::vector<std::string> > arg_p2p_seed_node = {"seed-node", "Connect to a node to retrieve peer addresses, and disconnect"};
const command_line::arg_descriptor<bool> arg_p2p_hide_my_port = {"hide-my-port", "Do not announce yourself as peerlist candidate", false, true};
}
std::string print_peerlist_to_string(const std::list<peerlist_entry>& pl) {
time_t now_time = 0;
time(&now_time);
std::stringstream ss;
ss << std::setfill('0') << std::setw(8) << std::hex << std::noshowbase;
for (const auto& pe : pl) {
ss << pe.id << "\t" << pe.adr << " \tlast_seen: " << Common::timeIntervalToString(now_time - pe.last_seen) << std::endl;
}
return ss.str();
}
template <typename Command, typename Handler>
int invokeAdaptor(const std::string& reqBuf, std::string& resBuf, p2p_connection_context& ctx, Handler handler) {
typedef typename Command::request Request;
typedef typename Command::response Response;
int command = Command::ID;
Request req = boost::value_initialized<Request>();
if (!LevinProtocol::decode(reqBuf, req)) {
throw std::runtime_error("Failed to load_from_binary in command " + std::to_string(command));
}
Response res = boost::value_initialized<Response>();
int ret = handler(command, req, res, ctx);
resBuf = LevinProtocol::encode(res);
return ret;
}
node_server::node_server(System::Dispatcher& dispatcher, CryptoNote::cryptonote_protocol_handler& payload_handler, Logging::ILogger& log) :
m_dispatcher(dispatcher),
m_payload_handler(payload_handler),
m_allow_local_ip(false),
m_hide_my_port(false),
m_network_id(BYTECOIN_NETWORK),
logger(log, "node_server"),
m_stopEvent(m_dispatcher),
m_shutdownCompleteEvent(m_dispatcher),
m_idleTimer(m_dispatcher),
m_timedSyncTimer(m_dispatcher),
m_spawnCount(0),
m_stop(false),
// intervals
// m_peer_handshake_idle_maker_interval(CryptoNote::P2P_DEFAULT_HANDSHAKE_INTERVAL),
m_connections_maker_interval(1),
m_peerlist_store_interval(60*30, false) {
}
#define INVOKE_HANDLER(CMD, Handler) case CMD::ID: { ret = invokeAdaptor<CMD>(cmd.buf, out, ctx, boost::bind(Handler, this, _1, _2, _3, _4)); break; }
int node_server::handleCommand(const LevinProtocol::Command& cmd, std::string& out, p2p_connection_context& ctx, bool& handled) {
int ret = 0;
handled = true;
if (cmd.isResponse && cmd.command == COMMAND_TIMED_SYNC::ID) {
if (!handleTimedSyncResponse(cmd.buf, ctx)) {
// invalid response, close connection
ctx.m_state = cryptonote_connection_context::state_shutdown;
}
return 0;
}
switch (cmd.command) {
INVOKE_HANDLER(COMMAND_HANDSHAKE, &node_server::handle_handshake)
INVOKE_HANDLER(COMMAND_TIMED_SYNC, &node_server::handle_timed_sync)
INVOKE_HANDLER(COMMAND_PING, &node_server::handle_ping)
#ifdef ALLOW_DEBUG_COMMANDS
INVOKE_HANDLER(COMMAND_REQUEST_STAT_INFO, &node_server::handle_get_stat_info)
INVOKE_HANDLER(COMMAND_REQUEST_NETWORK_STATE, &node_server::handle_get_network_state)
INVOKE_HANDLER(COMMAND_REQUEST_PEER_ID, &node_server::handle_get_peer_id)
#endif
default: {
handled = false;
ret = m_payload_handler.handleCommand(cmd.isNotify, cmd.command, cmd.buf, out, ctx, handled);
}
}
return ret;
}
#undef INVOKE_HANDLER
//-----------------------------------------------------------------------------------
void node_server::init_options(boost::program_options::options_description& desc)
{
command_line::add_arg(desc, arg_p2p_bind_ip);
command_line::add_arg(desc, arg_p2p_bind_port);
command_line::add_arg(desc, arg_p2p_external_port);
command_line::add_arg(desc, arg_p2p_allow_local_ip);
command_line::add_arg(desc, arg_p2p_add_peer);
command_line::add_arg(desc, arg_p2p_add_priority_node);
command_line::add_arg(desc, arg_p2p_add_exclusive_node);
command_line::add_arg(desc, arg_p2p_seed_node);
command_line::add_arg(desc, arg_p2p_hide_my_port);
}
//-----------------------------------------------------------------------------------
bool node_server::init_config() {
try {
std::string state_file_path = m_config_folder + "/" + CryptoNote::parameters::P2P_NET_DATA_FILENAME;
std::ifstream p2p_data;
p2p_data.open(state_file_path, std::ios_base::binary | std::ios_base::in);
if (!p2p_data.fail()) {
boost::archive::binary_iarchive a(p2p_data);
a >> *this;
} else {
make_default_config();
}
//at this moment we have hardcoded config
m_config.m_net_config.handshake_interval = CryptoNote::P2P_DEFAULT_HANDSHAKE_INTERVAL;
m_config.m_net_config.connections_count = CryptoNote::P2P_DEFAULT_CONNECTIONS_COUNT;
m_config.m_net_config.packet_max_size = CryptoNote::P2P_DEFAULT_PACKET_MAX_SIZE; //20 MB limit
m_config.m_net_config.config_id = 0; // initial config
m_config.m_net_config.connection_timeout = CryptoNote::P2P_DEFAULT_CONNECTION_TIMEOUT;
m_config.m_net_config.ping_connection_timeout = CryptoNote::P2P_DEFAULT_PING_CONNECTION_TIMEOUT;
m_config.m_net_config.send_peerlist_sz = CryptoNote::P2P_DEFAULT_PEERS_IN_HANDSHAKE;
m_first_connection_maker_call = true;
} catch (const std::exception& e) {
logger(ERROR) << "init_config failed: " << e.what();
return false;
}
return true;
}
//-----------------------------------------------------------------------------------
void node_server::for_each_connection(std::function<void(cryptonote_connection_context&, peerid_type)> f)
{
for (auto& ctx : m_connections) {
f(ctx.second, ctx.second.peer_id);
}
}
//-----------------------------------------------------------------------------------
void node_server::externalRelayNotifyToAll(int command, const std::string& data_buff) {
m_dispatcher.remoteSpawn([this, command, data_buff] {
relay_notify_to_all(command, data_buff, nullptr);
});
}
//-----------------------------------------------------------------------------------
bool node_server::make_default_config()
{
m_config.m_peer_id = crypto::rand<uint64_t>();
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::handle_command_line(const boost::program_options::variables_map& vm)
{
m_bind_ip = command_line::get_arg(vm, arg_p2p_bind_ip);
m_port = command_line::get_arg(vm, arg_p2p_bind_port);
m_external_port = command_line::get_arg(vm, arg_p2p_external_port);
m_allow_local_ip = command_line::get_arg(vm, arg_p2p_allow_local_ip);
if (command_line::has_arg(vm, arg_p2p_add_peer))
{
std::vector<std::string> perrs = command_line::get_arg(vm, arg_p2p_add_peer);
for(const std::string& pr_str: perrs)
{
peerlist_entry pe = AUTO_VAL_INIT(pe);
pe.id = crypto::rand<uint64_t>();
bool r = parse_peer_from_string(pe.adr, pr_str);
if (!(r)) { logger(ERROR, BRIGHT_RED) << "Failed to parse address from string: " << pr_str; return false; }
m_command_line_peers.push_back(pe);
}
}
if (command_line::has_arg(vm,arg_p2p_add_exclusive_node)) {
if (!parse_peers_and_add_to_container(vm, arg_p2p_add_exclusive_node, m_exclusive_peers))
return false;
}
if (command_line::has_arg(vm, arg_p2p_add_priority_node)) {
if (!parse_peers_and_add_to_container(vm, arg_p2p_add_priority_node, m_priority_peers))
return false;
}
if (command_line::has_arg(vm, arg_p2p_seed_node)) {
if (!parse_peers_and_add_to_container(vm, arg_p2p_seed_node, m_seed_nodes))
return false;
}
if (command_line::has_arg(vm, arg_p2p_hide_my_port)) {
m_hide_my_port = true;
}
return true;
}
bool node_server::handleConfig(const NetNodeConfig& config) {
m_bind_ip = config.bindIp;
m_port = config.bindPort;
m_external_port = config.externalPort;
m_allow_local_ip = config.allowLocalIp;
std::copy(config.peers.begin(), config.peers.end(), std::back_inserter(m_command_line_peers));
std::copy(config.exclusiveNodes.begin(), config.exclusiveNodes.end(), std::back_inserter(m_exclusive_peers));
std::copy(config.priorityNodes.begin(), config.priorityNodes.end(), std::back_inserter(m_priority_peers));
std::copy(config.seedNodes.begin(), config.seedNodes.end(), std::back_inserter(m_seed_nodes));
m_hide_my_port = config.hideMyPort;
return true;
}
bool node_server::append_net_address(std::vector<net_address>& nodes, const std::string& addr) {
size_t pos = addr.find_last_of(':');
if (!(std::string::npos != pos && addr.length() - 1 != pos && 0 != pos)) {
logger(ERROR, BRIGHT_RED) << "Failed to parse seed address from string: '" << addr << '\'';
return false;
}
std::string host = addr.substr(0, pos);
try {
uint32_t port = Common::fromString<uint32_t>(addr.substr(pos + 1));
System::Ipv4Resolver resolver(m_dispatcher);
auto addr = resolver.resolve(host);
nodes.push_back(net_address{hostToNetwork(addr.getValue()), port});
logger(TRACE) << "Added seed node: " << nodes.back() << " (" << host << ")";
} catch (const std::exception& e) {
logger(ERROR, BRIGHT_YELLOW) << "Failed to resolve host name '" << host << "': " << e.what();
return false;
}
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::init(const NetNodeConfig& config, bool testnet) {
if (!testnet) {
for (auto seed : CryptoNote::SEED_NODES) {
append_net_address(m_seed_nodes, seed);
}
} else {
m_network_id.data[0] += 1;
}
if (!handleConfig(config)) {
logger(ERROR, BRIGHT_RED) << "Failed to handle command line";
return false;
}
m_config_folder = config.configFolder;
if (!init_config()) {
logger(ERROR, BRIGHT_RED) << "Failed to init config.";
return false;
}
if (!m_peerlist.init(m_allow_local_ip)) {
logger(ERROR, BRIGHT_RED) << "Failed to init peerlist.";
return false;
}
for(auto& p: m_command_line_peers)
m_peerlist.append_with_peer_white(p);
//only in case if we really sure that we have external visible ip
m_have_address = true;
m_ip_address = 0;
m_last_stat_request_time = 0;
//configure self
// m_net_server.get_config_object().m_pcommands_handler = this;
// m_net_server.get_config_object().m_invoke_timeout = CryptoNote::P2P_DEFAULT_INVOKE_TIMEOUT;
//try to bind
logger(INFO) << "Binding on " << m_bind_ip << ":" << m_port;
m_listeningPort = Common::fromString<uint16_t>(m_port);
m_listener = System::TcpListener(m_dispatcher, System::Ipv4Address(m_bind_ip), static_cast<uint16_t>(m_listeningPort));
logger(INFO, BRIGHT_GREEN) << "Net service binded on " << m_bind_ip << ":" << m_listeningPort;
if(m_external_port)
logger(INFO) << "External port defined as " << m_external_port;
addPortMapping(logger, m_listeningPort);
return true;
}
//-----------------------------------------------------------------------------------
CryptoNote::cryptonote_protocol_handler& node_server::get_payload_object()
{
return m_payload_handler;
}
//-----------------------------------------------------------------------------------
bool node_server::run() {
logger(INFO) << "Starting node_server";
++m_spawnCount;
m_dispatcher.spawn(std::bind(&node_server::acceptLoop, this));
++m_spawnCount;
m_dispatcher.spawn(std::bind(&node_server::onIdle, this));
++m_spawnCount;
m_dispatcher.spawn(std::bind(&node_server::timedSyncLoop, this));
m_stopEvent.wait();
logger(INFO) << "Stopping node_server...";
m_listener.stop();
m_idleTimer.stop();
m_timedSyncTimer.stop();
logger(INFO) << "Stopping " << m_connections.size() << " connections";
for (auto& conn : m_connections) {
conn.second.connection.stop();
}
m_shutdownCompleteEvent.wait();
logger(INFO) << "net_service loop stopped";
return true;
}
//-----------------------------------------------------------------------------------
uint64_t node_server::get_connections_count() {
return m_connections.size();
}
//-----------------------------------------------------------------------------------
bool node_server::deinit() {
return store_config();
}
//-----------------------------------------------------------------------------------
bool node_server::store_config()
{
try {
if (!tools::create_directories_if_necessary(m_config_folder)) {
logger(INFO) << "Failed to create data directory: " << m_config_folder;
return false;
}
std::string state_file_path = m_config_folder + "/" + CryptoNote::parameters::P2P_NET_DATA_FILENAME;
std::ofstream p2p_data;
p2p_data.open(state_file_path, std::ios_base::binary | std::ios_base::out | std::ios::trunc);
if (p2p_data.fail()) {
logger(INFO) << "Failed to save config to file " << state_file_path;
return false;
};
boost::archive::binary_oarchive a(p2p_data);
a << *this;
return true;
} catch (const std::exception& e) {
logger(WARNING) << "store_config failed: " << e.what();
}
return false;
}
//-----------------------------------------------------------------------------------
bool node_server::send_stop_signal() {
m_stop = true;
m_dispatcher.remoteSpawn([this] {
m_stopEvent.set();
m_payload_handler.stop();
});
logger(INFO, BRIGHT_YELLOW) << "Stop signal sent";
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::handshake(CryptoNote::LevinProtocol& proto, p2p_connection_context& context, bool just_take_peerlist) {
COMMAND_HANDSHAKE::request arg;
COMMAND_HANDSHAKE::response rsp;
get_local_node_data(arg.node_data);
m_payload_handler.get_payload_sync_data(arg.payload_data);
proto.invoke(COMMAND_HANDSHAKE::ID, arg, rsp);
if (rsp.node_data.network_id != m_network_id) {
logger(Logging::ERROR) << context << "COMMAND_HANDSHAKE Failed, wrong network! (" << rsp.node_data.network_id << "), closing connection.";
return false;
}
if (!handle_remote_peerlist(rsp.local_peerlist, rsp.node_data.local_time, context)) {
logger(Logging::ERROR) << context << "COMMAND_HANDSHAKE: failed to handle_remote_peerlist(...), closing connection.";
return false;
}
if (just_take_peerlist) {
return true;
}
if (!m_payload_handler.process_payload_sync_data(rsp.payload_data, context, true)) {
logger(Logging::ERROR) << context << "COMMAND_HANDSHAKE invoked, but process_payload_sync_data returned false, dropping connection.";
return false;
}
context.peer_id = rsp.node_data.peer_id;
m_peerlist.set_peer_just_seen(rsp.node_data.peer_id, context.m_remote_ip, context.m_remote_port);
if (rsp.node_data.peer_id == m_config.m_peer_id) {
logger(Logging::TRACE) << context << "Connection to self detected, dropping connection";
return false;
}
logger(Logging::DEBUGGING) << context << "COMMAND_HANDSHAKE INVOKED OK";
return true;
}
bool node_server::timedSync() {
COMMAND_TIMED_SYNC::request arg = AUTO_VAL_INIT(arg);
m_payload_handler.get_payload_sync_data(arg.payload_data);
auto cmdBuf = LevinProtocol::encode<COMMAND_TIMED_SYNC::request>(arg);
forEachConnection([&](p2p_connection_context& conn) {
if (conn.peer_id &&
(conn.m_state == cryptonote_connection_context::state_normal ||
conn.m_state == cryptonote_connection_context::state_idle)) {
try {
System::LatchGuard latch(conn.writeLatch);
System::EventLock lock(conn.connectionEvent);
LevinProtocol(conn.connection).sendBuf(COMMAND_TIMED_SYNC::ID, cmdBuf, true, false);
} catch (std::exception&) {
logger(DEBUGGING) << conn << "Failed to send COMMAND_TIMED_SYNC";
}
}
});
return true;
}
bool node_server::handleTimedSyncResponse(const std::string& in, p2p_connection_context& context) {
COMMAND_TIMED_SYNC::response rsp;
if (!LevinProtocol::decode<COMMAND_TIMED_SYNC::response>(in, rsp)) {
return false;
}
if (!handle_remote_peerlist(rsp.local_peerlist, rsp.local_time, context)) {
logger(Logging::ERROR) << context << "COMMAND_TIMED_SYNC: failed to handle_remote_peerlist(...), closing connection.";
return false;
}
if (!context.m_is_income) {
m_peerlist.set_peer_just_seen(context.peer_id, context.m_remote_ip, context.m_remote_port);
}
if (!m_payload_handler.process_payload_sync_data(rsp.payload_data, context, false)) {
return false;
}
return true;
}
void node_server::forEachConnection(std::function<void(p2p_connection_context&)> action) {
// create copy of connection ids because the list can be changed during action
std::vector<boost::uuids::uuid> connectionIds;
connectionIds.reserve(m_connections.size());
for (const auto& c : m_connections) {
connectionIds.push_back(c.first);
}
for (const auto& connId : connectionIds) {
auto it = m_connections.find(connId);
if (it != m_connections.end()) {
action(it->second);
}
}
}
//-----------------------------------------------------------------------------------
bool node_server::is_peer_used(const peerlist_entry& peer) {
if(m_config.m_peer_id == peer.id)
return true; //dont make connections to ourself
for (const auto& kv : m_connections) {
const auto& cntxt = kv.second;
if(cntxt.peer_id == peer.id || (!cntxt.m_is_income && peer.adr.ip == cntxt.m_remote_ip && peer.adr.port == cntxt.m_remote_port)) {
return true;
}
}
return false;
}
//-----------------------------------------------------------------------------------
bool node_server::is_addr_connected(const net_address& peer) {
for (const auto& conn : m_connections) {
if (!conn.second.m_is_income && peer.ip == conn.second.m_remote_ip && peer.port == conn.second.m_remote_port) {
return true;
}
}
return false;
}
bool node_server::try_to_connect_and_handshake_with_new_peer(const net_address& na, bool just_take_peerlist, uint64_t last_seen_stamp, bool white) {
logger(DEBUGGING) << "Connecting to " << na << " (white=" << white << ", last_seen: "
<< (last_seen_stamp ? Common::timeIntervalToString(time(NULL) - last_seen_stamp) : "never") << ")...";
try {
System::TcpConnector connector(m_dispatcher);
System::Event timeoutEvent(m_dispatcher);
System::Timer timeoutTimer(m_dispatcher);
m_dispatcher.spawn([&](){
try {
timeoutTimer.sleep(std::chrono::milliseconds(m_config.m_net_config.connection_timeout));
connector.stop();
} catch (std::exception&) {}
timeoutEvent.set();
});
System::TcpConnection connection;
try {
connection = connector.connect(System::Ipv4Address(Common::ipAddressToString(na.ip)), static_cast<uint16_t>(na.port));
} catch (System::InterruptedException&) {
timeoutEvent.wait();
return false;
} catch (std::exception&) {
timeoutTimer.stop();
timeoutEvent.wait();
throw;
}
p2p_connection_context ctx(m_dispatcher, std::move(connection));
timeoutTimer.stop();
timeoutEvent.wait();
// p2p_connection_context ctx(m_dispatcher, std::move(connector.connect()));
ctx.m_connection_id = boost::uuids::random_generator()();
ctx.m_remote_ip = na.ip;
ctx.m_remote_port = na.port;
ctx.m_is_income = false;
ctx.m_started = time(nullptr);
CryptoNote::LevinProtocol proto(ctx.connection);
if (!handshake(proto, ctx, just_take_peerlist)) {
logger(WARNING) << "Failed to HANDSHAKE with peer " << na;
return false;
}
if (just_take_peerlist) {
logger(Logging::DEBUGGING, Logging::BRIGHT_GREEN) << ctx << "CONNECTION HANDSHAKED OK AND CLOSED.";
return true;
}
peerlist_entry pe_local = AUTO_VAL_INIT(pe_local);
pe_local.adr = na;
pe_local.id = ctx.peer_id;
time(&pe_local.last_seen);
m_peerlist.append_with_peer_white(pe_local);
if (m_stop) {
throw System::InterruptedException();
}
auto iter = m_connections.emplace(ctx.m_connection_id, std::move(ctx)).first;
++m_spawnCount;
m_dispatcher.spawn(std::bind(&node_server::connectionHandler, this, iter));
return true;
} catch (System::InterruptedException&) {
logger(DEBUGGING) << "Connection process interrupted";
throw;
} catch (const std::exception& e) {
logger(DEBUGGING) << "Connection to " << na << " failed: " << e.what();
}
return false;
}
//-----------------------------------------------------------------------------------
bool node_server::make_new_connection_from_peerlist(bool use_white_list)
{
size_t local_peers_count = use_white_list ? m_peerlist.get_white_peers_count():m_peerlist.get_gray_peers_count();
if(!local_peers_count)
return false;//no peers
size_t max_random_index = std::min<uint64_t>(local_peers_count -1, 20);
std::set<size_t> tried_peers;
size_t try_count = 0;
size_t rand_count = 0;
while(rand_count < (max_random_index+1)*3 && try_count < 10 && !m_stop) {
++rand_count;
size_t random_index = get_random_index_with_fixed_probability(max_random_index);
if (!(random_index < local_peers_count)) { logger(ERROR, BRIGHT_RED) << "random_starter_index < peers_local.size() failed!!"; return false; }
if(tried_peers.count(random_index))
continue;
tried_peers.insert(random_index);
peerlist_entry pe = AUTO_VAL_INIT(pe);
bool r = use_white_list ? m_peerlist.get_white_peer_by_index(pe, random_index):m_peerlist.get_gray_peer_by_index(pe, random_index);
if (!(r)) { logger(ERROR, BRIGHT_RED) << "Failed to get random peer from peerlist(white:" << use_white_list << ")"; return false; }
++try_count;
if(is_peer_used(pe))
continue;
logger(DEBUGGING) << "Selected peer: " << pe.id << " " << pe.adr << " [white=" << use_white_list
<< "] last_seen: " << (pe.last_seen ? Common::timeIntervalToString(time(NULL) - pe.last_seen) : "never");
if(!try_to_connect_and_handshake_with_new_peer(pe.adr, false, pe.last_seen, use_white_list))
continue;
return true;
}
return false;
}
//-----------------------------------------------------------------------------------
bool node_server::connections_maker()
{
if (!connect_to_peerlist(m_exclusive_peers)) {
return false;
}
if (!m_exclusive_peers.empty()) {
return true;
}
if(!m_peerlist.get_white_peers_count() && m_seed_nodes.size()) {
size_t try_count = 0;
size_t current_index = crypto::rand<size_t>()%m_seed_nodes.size();
while(true) {
if(try_to_connect_and_handshake_with_new_peer(m_seed_nodes[current_index], true))
break;
if(++try_count > m_seed_nodes.size()) {
logger(ERROR) << "Failed to connect to any of seed peers, continuing without seeds";
break;
}
if(++current_index >= m_seed_nodes.size())
current_index = 0;
}
}
if (!connect_to_peerlist(m_priority_peers)) return false;
size_t expected_white_connections = (m_config.m_net_config.connections_count * CryptoNote::P2P_DEFAULT_WHITELIST_CONNECTIONS_PERCENT) / 100;
size_t conn_count = get_outgoing_connections_count();
if(conn_count < m_config.m_net_config.connections_count)
{
if(conn_count < expected_white_connections)
{
//start from white list
if(!make_expected_connections_count(true, expected_white_connections))
return false;
//and then do grey list
if(!make_expected_connections_count(false, m_config.m_net_config.connections_count))
return false;
}else
{
//start from grey list
if(!make_expected_connections_count(false, m_config.m_net_config.connections_count))
return false;
//and then do white list
if(!make_expected_connections_count(true, m_config.m_net_config.connections_count))
return false;
}
}
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::make_expected_connections_count(bool white_list, size_t expected_connections)
{
size_t conn_count = get_outgoing_connections_count();
//add new connections from white peers
while(conn_count < expected_connections)
{
if(m_stopEvent.get())
return false;
if(!make_new_connection_from_peerlist(white_list))
break;
conn_count = get_outgoing_connections_count();
}
return true;
}
//-----------------------------------------------------------------------------------
size_t node_server::get_outgoing_connections_count() {
size_t count = 0;
for (const auto& cntxt : m_connections) {
if (!cntxt.second.m_is_income)
++count;
}
return count;
}
//-----------------------------------------------------------------------------------
bool node_server::idle_worker() {
m_connections_maker_interval.call(std::bind(&node_server::connections_maker, this));
m_peerlist_store_interval.call(std::bind(&node_server::store_config, this));
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::fix_time_delta(std::list<peerlist_entry>& local_peerlist, time_t local_time, int64_t& delta)
{
//fix time delta
time_t now = 0;
time(&now);
delta = now - local_time;
BOOST_FOREACH(peerlist_entry& be, local_peerlist)
{
if(be.last_seen > local_time)
{
logger(ERROR) << "FOUND FUTURE peerlist for entry " << be.adr << " last_seen: " << be.last_seen << ", local_time(on remote node):" << local_time;
return false;
}
be.last_seen += delta;
}
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::handle_remote_peerlist(const std::list<peerlist_entry>& peerlist, time_t local_time, const cryptonote_connection_context& context)
{
int64_t delta = 0;
std::list<peerlist_entry> peerlist_ = peerlist;
if(!fix_time_delta(peerlist_, local_time, delta))
return false;
logger(Logging::TRACE) << context << "REMOTE PEERLIST: TIME_DELTA: " << delta << ", remote peerlist size=" << peerlist_.size();
logger(Logging::TRACE) << context << "REMOTE PEERLIST: " << print_peerlist_to_string(peerlist_);
return m_peerlist.merge_peerlist(peerlist_);
}
//-----------------------------------------------------------------------------------
bool node_server::get_local_node_data(basic_node_data& node_data)
{
time_t local_time;
time(&local_time);
node_data.local_time = local_time;
node_data.peer_id = m_config.m_peer_id;
if(!m_hide_my_port)
node_data.my_port = m_external_port ? m_external_port : m_listeningPort;
else
node_data.my_port = 0;
node_data.network_id = m_network_id;
return true;
}
//-----------------------------------------------------------------------------------
#ifdef ALLOW_DEBUG_COMMANDS
bool node_server::check_trust(const proof_of_trust& tr)
{
uint64_t local_time = time(NULL);
uint64_t time_delata = local_time > tr.time ? local_time - tr.time: tr.time - local_time;
if(time_delata > 24*60*60 )
{
logger(ERROR) << "check_trust failed to check time conditions, local_time=" << local_time << ", proof_time=" << tr.time;
return false;
}
if(m_last_stat_request_time >= tr.time )
{
logger(ERROR) << "check_trust failed to check time conditions, last_stat_request_time=" << m_last_stat_request_time << ", proof_time=" << tr.time;
return false;
}
if(m_config.m_peer_id != tr.peer_id)
{
logger(ERROR) << "check_trust failed: peer_id mismatch (passed " << tr.peer_id << ", expected " << m_config.m_peer_id<< ")";
return false;
}
crypto::public_key pk = AUTO_VAL_INIT(pk);
Common::podFromHex(CryptoNote::P2P_STAT_TRUSTED_PUB_KEY, pk);
crypto::hash h = get_proof_of_trust_hash(tr);
if(!crypto::check_signature(h, pk, tr.sign))
{
logger(ERROR) << "check_trust failed: sign check failed";
return false;
}
//update last request time
m_last_stat_request_time = tr.time;
return true;
}
//-----------------------------------------------------------------------------------
int node_server::handle_get_stat_info(int command, COMMAND_REQUEST_STAT_INFO::request& arg, COMMAND_REQUEST_STAT_INFO::response& rsp, p2p_connection_context& context)
{
if(!check_trust(arg.tr)) {
context.m_state = cryptonote_connection_context::state_shutdown;
return 1;
}
rsp.connections_count = get_connections_count();
rsp.incoming_connections_count = rsp.connections_count - get_outgoing_connections_count();
rsp.version = PROJECT_VERSION_LONG;
rsp.os_version = tools::get_os_version_string();
m_payload_handler.get_stat_info(rsp.payload_info);
return 1;
}
//-----------------------------------------------------------------------------------
int node_server::handle_get_network_state(int command, COMMAND_REQUEST_NETWORK_STATE::request& arg, COMMAND_REQUEST_NETWORK_STATE::response& rsp, p2p_connection_context& context)
{
if(!check_trust(arg.tr)) {
context.m_state = cryptonote_connection_context::state_shutdown;
return 1;
}
for (const auto& cntxt : m_connections) {
connection_entry ce;
ce.adr.ip = cntxt.second.m_remote_ip;
ce.adr.port = cntxt.second.m_remote_port;
ce.id = cntxt.second.peer_id;
ce.is_income = cntxt.second.m_is_income;
rsp.connections_list.push_back(ce);
}
m_peerlist.get_peerlist_full(rsp.local_peerlist_gray, rsp.local_peerlist_white);
rsp.my_id = m_config.m_peer_id;
rsp.local_time = time(NULL);
return 1;
}
//-----------------------------------------------------------------------------------
int node_server::handle_get_peer_id(int command, COMMAND_REQUEST_PEER_ID::request& arg, COMMAND_REQUEST_PEER_ID::response& rsp, p2p_connection_context& context)
{
rsp.my_id = m_config.m_peer_id;
return 1;
}
#endif
//-----------------------------------------------------------------------------------
void node_server::relay_notify_to_all(int command, const std::string& data_buff, const net_connection_id* excludeConnection) {
net_connection_id excludeId = excludeConnection ? *excludeConnection : boost::value_initialized<net_connection_id>();
forEachConnection([&](p2p_connection_context& conn) {
if (conn.peer_id && conn.m_connection_id != excludeId) {
try {
logger(TRACE) << conn << "Relay command " << command;
System::LatchGuard latch(conn.writeLatch);
System::EventLock lock(conn.connectionEvent);
LevinProtocol(conn.connection).sendBuf(command, data_buff, false);
} catch (const std::exception& e) {
logger(DEBUGGING) << conn << "Failed to relay notification id=" << command << ": " << e.what();
}
}
});
}
//-----------------------------------------------------------------------------------
bool node_server::invoke_notify_to_peer(int command, const std::string& req_buff, const cryptonote_connection_context& context) {
auto it = m_connections.find(context.m_connection_id);
if (it == m_connections.end()) {
return false;
}
try {
System::LatchGuard latch(it->second.writeLatch);
System::EventLock lock(it->second.connectionEvent);
LevinProtocol(it->second.connection).sendBuf(command, req_buff, false);
} catch (const std::exception& e) {
logger(DEBUGGING) << it->second << "Failed to invoke notification id=" << command << ": " << e.what();
}
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::try_ping(basic_node_data& node_data, p2p_connection_context& context)
{
if(!node_data.my_port)
return false;
uint32_t actual_ip = context.m_remote_ip;
if(!m_peerlist.is_ip_allowed(actual_ip))
return false;
std::string ip = Common::ipAddressToString(actual_ip);
auto port = node_data.my_port;
peerid_type pr = node_data.peer_id;
try {
System::TcpConnector connector(m_dispatcher);
System::TcpConnection conn = connector.connect(System::Ipv4Address(ip), static_cast<uint16_t>(port));
LevinProtocol proto(conn);
COMMAND_PING::request req;
COMMAND_PING::response rsp;
proto.invoke(COMMAND_PING::ID, req, rsp);
if (rsp.status != PING_OK_RESPONSE_STATUS_TEXT || pr != rsp.peer_id) {
logger(Logging::DEBUGGING) << context << "back ping invoke wrong response \"" << rsp.status << "\" from" << ip << ":" << port << ", hsh_peer_id=" << pr << ", rsp.peer_id=" << rsp.peer_id;
return false;
}
return true;
} catch (std::exception& e) {
logger(Logging::DEBUGGING) << context << "back ping to " << ip << ":" << port << " failed: " << e.what();
}
return false;
}
//-----------------------------------------------------------------------------------
int node_server::handle_timed_sync(int command, COMMAND_TIMED_SYNC::request& arg, COMMAND_TIMED_SYNC::response& rsp, p2p_connection_context& context)
{
if(!m_payload_handler.process_payload_sync_data(arg.payload_data, context, false)) {
logger(Logging::ERROR) << context << "Failed to process_payload_sync_data(), dropping connection";
context.m_state = cryptonote_connection_context::state_shutdown;
return 1;
}
//fill response
rsp.local_time = time(NULL);
m_peerlist.get_peerlist_head(rsp.local_peerlist);
m_payload_handler.get_payload_sync_data(rsp.payload_data);
logger(Logging::TRACE) << context << "COMMAND_TIMED_SYNC";
return 1;
}
//-----------------------------------------------------------------------------------
int node_server::handle_handshake(int command, COMMAND_HANDSHAKE::request& arg, COMMAND_HANDSHAKE::response& rsp, p2p_connection_context& context)
{
if(arg.node_data.network_id != m_network_id) {
logger(Logging::INFO) << context << "WRONG NETWORK AGENT CONNECTED! id=" << arg.node_data.network_id;
context.m_state = cryptonote_connection_context::state_shutdown;
return 1;
}
if(!context.m_is_income) {
logger(Logging::ERROR) << context << "COMMAND_HANDSHAKE came not from incoming connection";
context.m_state = cryptonote_connection_context::state_shutdown;
return 1;
}
if(context.peer_id) {
logger(Logging::ERROR) << context << "COMMAND_HANDSHAKE came, but seems that connection already have associated peer_id (double COMMAND_HANDSHAKE?)";
context.m_state = cryptonote_connection_context::state_shutdown;
return 1;
}
if(!m_payload_handler.process_payload_sync_data(arg.payload_data, context, true)) {
logger(Logging::ERROR) << context << "COMMAND_HANDSHAKE came, but process_payload_sync_data returned false, dropping connection.";
context.m_state = cryptonote_connection_context::state_shutdown;
return 1;
}
//associate peer_id with this connection
context.peer_id = arg.node_data.peer_id;
if(arg.node_data.peer_id != m_config.m_peer_id && arg.node_data.my_port) {
peerid_type peer_id_l = arg.node_data.peer_id;
uint32_t port_l = arg.node_data.my_port;
if (try_ping(arg.node_data, context)) {
//called only(!) if success pinged, update local peerlist
peerlist_entry pe;
pe.adr.ip = context.m_remote_ip;
pe.adr.port = port_l;
time(&pe.last_seen);
pe.id = peer_id_l;
m_peerlist.append_with_peer_white(pe);
logger(Logging::TRACE) << context << "PING SUCCESS " << Common::ipAddressToString(context.m_remote_ip) << ":" << port_l;
}
}
//fill response
m_peerlist.get_peerlist_head(rsp.local_peerlist);
get_local_node_data(rsp.node_data);
m_payload_handler.get_payload_sync_data(rsp.payload_data);
logger(Logging::DEBUGGING, Logging::BRIGHT_GREEN) << "COMMAND_HANDSHAKE";
return 1;
}
//-----------------------------------------------------------------------------------
int node_server::handle_ping(int command, COMMAND_PING::request& arg, COMMAND_PING::response& rsp, p2p_connection_context& context)
{
logger(Logging::TRACE) << context << "COMMAND_PING";
rsp.status = PING_OK_RESPONSE_STATUS_TEXT;
rsp.peer_id = m_config.m_peer_id;
return 1;
}
//-----------------------------------------------------------------------------------
bool node_server::log_peerlist()
{
std::list<peerlist_entry> pl_wite;
std::list<peerlist_entry> pl_gray;
m_peerlist.get_peerlist_full(pl_gray, pl_wite);
logger(INFO) << ENDL << "Peerlist white:" << ENDL << print_peerlist_to_string(pl_wite) << ENDL << "Peerlist gray:" << ENDL << print_peerlist_to_string(pl_gray) ;
return true;
}
//-----------------------------------------------------------------------------------
bool node_server::log_connections() {
logger(INFO) << "Connections: \r\n" << print_connections_container() ;
return true;
}
//-----------------------------------------------------------------------------------
std::string node_server::print_connections_container() {
std::stringstream ss;
for (const auto& cntxt : m_connections) {
ss << Common::ipAddressToString(cntxt.second.m_remote_ip) << ":" << cntxt.second.m_remote_port
<< " \t\tpeer_id " << cntxt.second.peer_id
<< " \t\tconn_id " << cntxt.second.m_connection_id << (cntxt.second.m_is_income ? " INC" : " OUT")
<< std::endl;
}
return ss.str();
}
//-----------------------------------------------------------------------------------
void node_server::on_connection_new(p2p_connection_context& context)
{
logger(TRACE) << context << "NEW CONNECTION";
m_payload_handler.onConnectionOpened(context);
}
//-----------------------------------------------------------------------------------
void node_server::on_connection_close(p2p_connection_context& context)
{
logger(TRACE) << context << "CLOSE CONNECTION";
m_payload_handler.onConnectionClosed(context);
}
bool node_server::is_priority_node(const net_address& na)
{
return
(std::find(m_priority_peers.begin(), m_priority_peers.end(), na) != m_priority_peers.end()) ||
(std::find(m_exclusive_peers.begin(), m_exclusive_peers.end(), na) != m_exclusive_peers.end());
}
bool node_server::connect_to_peerlist(const std::vector<net_address>& peers)
{
for(const auto& na: peers) {
if (!is_addr_connected(na)) {
try_to_connect_and_handshake_with_new_peer(na);
}
}
return true;
}
bool node_server::parse_peers_and_add_to_container(const boost::program_options::variables_map& vm,
const command_line::arg_descriptor<std::vector<std::string> > & arg, std::vector<net_address>& container)
{
std::vector<std::string> perrs = command_line::get_arg(vm, arg);
for(const std::string& pr_str: perrs) {
net_address na = AUTO_VAL_INIT(na);
if (!parse_peer_from_string(na, pr_str)) {
logger(ERROR, BRIGHT_RED) << "Failed to parse address from string: " << pr_str;
return false;
}
container.push_back(na);
}
return true;
}
void node_server::acceptLoop() {
try {
for (;;) {
p2p_connection_context ctx(m_dispatcher, m_listener.accept());
ctx.m_connection_id = boost::uuids::random_generator()();
ctx.m_is_income = true;
ctx.m_started = time(nullptr);
auto addressAndPort = ctx.connection.getPeerAddressAndPort();
ctx.m_remote_ip = hostToNetwork(addressAndPort.first.getValue());
ctx.m_remote_port = addressAndPort.second;
auto iter = m_connections.emplace(ctx.m_connection_id, std::move(ctx)).first;
++m_spawnCount;
m_dispatcher.spawn(std::bind(&node_server::connectionHandler, this, iter));
}
} catch (System::InterruptedException&) {
} catch (const std::exception& e) {
logger(WARNING) << "Exception in acceptLoop: " << e.what();
}
logger(DEBUGGING) << "acceptLoop finished";
if (--m_spawnCount == 0) {
m_shutdownCompleteEvent.set();
}
}
void node_server::onIdle() {
logger(DEBUGGING) << "onIdle started";
try {
while (!m_stop) {
idle_worker();
m_payload_handler.on_idle();
m_idleTimer.sleep(std::chrono::seconds(1));
}
} catch (System::InterruptedException&) {
} catch (std::exception& e) {
logger(WARNING) << "Exception in onIdle: " << e.what();
}
logger(DEBUGGING) << "onIdle finished";
if (--m_spawnCount == 0) {
m_shutdownCompleteEvent.set();
}
}
void node_server::timedSyncLoop() {
try {
for (;;) {
m_timedSyncTimer.sleep(std::chrono::seconds(P2P_DEFAULT_HANDSHAKE_INTERVAL));
timedSync();
}
} catch (System::InterruptedException&) {
} catch (std::exception& e) {
logger(WARNING) << "Exception in timedSyncLoop: " << e.what();
}
logger(DEBUGGING) << "timedSyncLoop finished";
if (--m_spawnCount == 0) {
m_shutdownCompleteEvent.set();
}
}
void node_server::connectionHandler(ConnectionIterator connIter) {
try {
auto& ctx = connIter->second;
on_connection_new(ctx);
LevinProtocol proto(ctx.connection);
LevinProtocol::Command cmd;
for (;;) {
if (ctx.m_state == cryptonote_connection_context::state_sync_required) {
ctx.m_state = cryptonote_connection_context::state_synchronizing;
m_payload_handler.start_sync(ctx);
}
if (!proto.readCommand(cmd)) {
break;
}
std::string response;
bool handled = false;
auto retcode = handleCommand(cmd, response, ctx, handled);
// send response
if (cmd.needReply()) {
System::LatchGuard latch(ctx.writeLatch);
System::EventLock lock(ctx.connectionEvent);
if (handled) {
proto.sendReply(cmd.command, response, retcode);
} else {
proto.sendReply(cmd.command, std::string(), static_cast<int32_t>(LevinError::ERROR_CONNECTION_HANDLER_NOT_DEFINED));
}
}
if (ctx.m_state == cryptonote_connection_context::state_shutdown) {
break;
}
}
} catch (System::InterruptedException&) {
logger(TRACE) << "Closing connection...";
} catch (std::exception& e) {
logger(WARNING) << "Exception in connectionHandler: " << e.what();
}
connIter->second.writeLatch.wait();
on_connection_close(connIter->second);
m_connections.erase(connIter);
if (--m_spawnCount == 0) {
m_shutdownCompleteEvent.set();
}
}
}
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