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danicoin/src/p2p/net_node.inl
moneromooo-monero 70b8c6d77a
cryptonote_protocol: misc fixes to the new sync algorithm 
Fix sync wedge corner case:
It could happen if a connection went into standby mode, while
it was the one which had requested the next span, and that span
was still waiting for the data, and that peer is not on the
main chain. Other peers can then start asking for that data
again and again, but never get it as only that forked peer does.

And various other fixes
2017-08-21 21:57:19 +01:00

1977 lines
76 KiB
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// Copyright (c) 2014-2017, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
// IP blocking adapted from Boolberry
#pragma once
#include <algorithm>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/thread/thread.hpp>
#include <atomic>
#include "version.h"
#include "string_tools.h"
#include "common/util.h"
#include "common/dns_utils.h"
#include "net/net_helper.h"
#include "math_helper.h"
#include "p2p_protocol_defs.h"
#include "net_peerlist_boost_serialization.h"
#include "net/local_ip.h"
#include "crypto/crypto.h"
#include "storages/levin_abstract_invoke2.h"
// We have to look for miniupnpc headers in different places, dependent on if its compiled or external
#ifdef UPNP_STATIC
#include <miniupnpc/miniupnpc.h>
#include <miniupnpc/upnpcommands.h>
#include <miniupnpc/upnperrors.h>
#else
#include "miniupnpc.h"
#include "upnpcommands.h"
#include "upnperrors.h"
#endif
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net.p2p"
#define NET_MAKE_IP(b1,b2,b3,b4) ((LPARAM)(((DWORD)(b1)<<24)+((DWORD)(b2)<<16)+((DWORD)(b3)<<8)+((DWORD)(b4))))
#define MIN_WANTED_SEED_NODES 12
namespace nodetool
{
namespace
{
const int64_t default_limit_up = 2048;
const int64_t default_limit_down = 8192;
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"
, std::to_string(config::P2P_DEFAULT_PORT)
};
const command_line::arg_descriptor<std::string> arg_testnet_p2p_bind_port = {
"testnet-p2p-bind-port"
, "Port for testnet p2p network protocol"
, std::to_string(config::testnet::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};
const command_line::arg_descriptor<bool> arg_no_igd = {"no-igd", "Disable UPnP port mapping"};
const command_line::arg_descriptor<bool> arg_offline = {"offline", "Do not listen for peers, nor connect to any"};
const command_line::arg_descriptor<int64_t> arg_out_peers = {"out-peers", "set max number of out peers", -1};
const command_line::arg_descriptor<int> arg_tos_flag = {"tos-flag", "set TOS flag", -1};
const command_line::arg_descriptor<int64_t> arg_limit_rate_up = {"limit-rate-up", "set limit-rate-up [kB/s]", -1};
const command_line::arg_descriptor<int64_t> arg_limit_rate_down = {"limit-rate-down", "set limit-rate-down [kB/s]", -1};
const command_line::arg_descriptor<int64_t> arg_limit_rate = {"limit-rate", "set limit-rate [kB/s]", -1};
const command_line::arg_descriptor<bool> arg_save_graph = {"save-graph", "Save data for dr monero", false};
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
void node_server<t_payload_net_handler>::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, false);
command_line::add_arg(desc, arg_testnet_p2p_bind_port, false);
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);
command_line::add_arg(desc, arg_no_igd);
command_line::add_arg(desc, arg_offline);
command_line::add_arg(desc, arg_out_peers);
command_line::add_arg(desc, arg_tos_flag);
command_line::add_arg(desc, arg_limit_rate_up);
command_line::add_arg(desc, arg_limit_rate_down);
command_line::add_arg(desc, arg_limit_rate);
command_line::add_arg(desc, arg_save_graph);
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::init_config()
{
//
TRY_ENTRY();
std::string state_file_path = m_config_folder + "/" + 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())
{
try
{
// first try reading in portable mode
boost::archive::portable_binary_iarchive a(p2p_data);
a >> *this;
}
catch (...)
{
// if failed, try reading in unportable mode
boost::filesystem::copy_file(state_file_path, state_file_path + ".unportable", boost::filesystem::copy_option::overwrite_if_exists);
p2p_data.close();
p2p_data.open( state_file_path , std::ios_base::binary | std::ios_base::in);
if(!p2p_data.fail())
{
try
{
boost::archive::binary_iarchive a(p2p_data);
a >> *this;
}
catch (const std::exception &e)
{
MWARNING("Failed to load p2p config file, falling back to default config");
m_peerlist = peerlist_manager(); // it was probably half clobbered by the failed load
make_default_config();
}
}
else
{
make_default_config();
}
}
}else
{
make_default_config();
}
// always recreate a new peer id
make_default_peer_id();
//at this moment we have hardcoded config
m_config.m_net_config.handshake_interval = P2P_DEFAULT_HANDSHAKE_INTERVAL;
m_config.m_net_config.packet_max_size = 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 = P2P_DEFAULT_CONNECTION_TIMEOUT;
m_config.m_net_config.ping_connection_timeout = P2P_DEFAULT_PING_CONNECTION_TIMEOUT;
m_config.m_net_config.send_peerlist_sz = P2P_DEFAULT_PEERS_IN_HANDSHAKE;
m_config.m_support_flags = P2P_SUPPORT_FLAGS;
m_first_connection_maker_call = true;
CATCH_ENTRY_L0("node_server::init_config", false);
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
void node_server<t_payload_net_handler>::for_each_connection(std::function<bool(typename t_payload_net_handler::connection_context&, peerid_type, uint32_t)> f)
{
m_net_server.get_config_object().foreach_connection([&](p2p_connection_context& cntx){
return f(cntx, cntx.peer_id, cntx.support_flags);
});
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::for_connection(const boost::uuids::uuid &connection_id, std::function<bool(typename t_payload_net_handler::connection_context&, peerid_type, uint32_t)> f)
{
return m_net_server.get_config_object().for_connection(connection_id, [&](p2p_connection_context& cntx){
return f(cntx, cntx.peer_id, cntx.support_flags);
});
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::is_remote_host_allowed(const epee::net_utils::network_address &address)
{
CRITICAL_REGION_LOCAL(m_blocked_hosts_lock);
auto it = m_blocked_hosts.find(address.host_str());
if(it == m_blocked_hosts.end())
return true;
if(time(nullptr) >= it->second)
{
m_blocked_hosts.erase(it);
MCLOG_CYAN(el::Level::Info, "global", "Host " << address.host_str() << " unblocked.");
return true;
}
return false;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::make_default_peer_id()
{
m_config.m_peer_id = crypto::rand<uint64_t>();
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::make_default_config()
{
return make_default_peer_id();
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::block_host(const epee::net_utils::network_address &addr, time_t seconds)
{
CRITICAL_REGION_LOCAL(m_blocked_hosts_lock);
m_blocked_hosts[addr.host_str()] = time(nullptr) + seconds;
// drop any connection to that IP
std::list<boost::uuids::uuid> conns;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if (cntxt.m_remote_address.is_same_host(addr))
{
conns.push_back(cntxt.m_connection_id);
}
return true;
});
for (const auto &c: conns)
m_net_server.get_config_object().close(c);
MCLOG_CYAN(el::Level::Info, "global", "Host " << addr.host_str() << " blocked.");
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::unblock_host(const epee::net_utils::network_address &address)
{
CRITICAL_REGION_LOCAL(m_blocked_hosts_lock);
auto i = m_blocked_hosts.find(address.host_str());
if (i == m_blocked_hosts.end())
return false;
m_blocked_hosts.erase(i);
MCLOG_CYAN(el::Level::Info, "global", "Host " << address.host_str() << " unblocked.");
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::add_host_fail(const epee::net_utils::network_address &address)
{
CRITICAL_REGION_LOCAL(m_host_fails_score_lock);
uint64_t fails = ++m_host_fails_score[address.host_str()];
MDEBUG("Host " << address.host_str() << " fail score=" << fails);
if(fails > P2P_IP_FAILS_BEFORE_BLOCK)
{
auto it = m_host_fails_score.find(address.host_str());
CHECK_AND_ASSERT_MES(it != m_host_fails_score.end(), false, "internal error");
it->second = P2P_IP_FAILS_BEFORE_BLOCK/2;
block_host(address);
}
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::parse_peer_from_string(epee::net_utils::network_address& pe, const std::string& node_addr, uint16_t default_port)
{
return epee::net_utils::create_network_address(pe, node_addr, default_port);
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::handle_command_line(
const boost::program_options::variables_map& vm
)
{
auto p2p_bind_arg = m_testnet ? arg_testnet_p2p_bind_port : arg_p2p_bind_port;
m_bind_ip = command_line::get_arg(vm, arg_p2p_bind_ip);
m_port = command_line::get_arg(vm, p2p_bind_arg);
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);
m_no_igd = command_line::get_arg(vm, arg_no_igd);
m_offline = command_line::get_arg(vm, arg_offline);
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)
{
nodetool::peerlist_entry pe = AUTO_VAL_INIT(pe);
pe.id = crypto::rand<uint64_t>();
const uint16_t default_port = m_testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
bool r = parse_peer_from_string(pe.adr, pr_str, default_port);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse address from string: " << pr_str);
m_command_line_peers.push_back(pe);
}
}
if(command_line::has_arg(vm, arg_save_graph))
{
set_save_graph(true);
}
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;
if ( !set_max_out_peers(vm, command_line::get_arg(vm, arg_out_peers) ) )
return false;
if ( !set_tos_flag(vm, command_line::get_arg(vm, arg_tos_flag) ) )
return false;
if ( !set_rate_up_limit(vm, command_line::get_arg(vm, arg_limit_rate_up) ) )
return false;
if ( !set_rate_down_limit(vm, command_line::get_arg(vm, arg_limit_rate_down) ) )
return false;
if ( !set_rate_limit(vm, command_line::get_arg(vm, arg_limit_rate) ) )
return false;
return true;
}
//-----------------------------------------------------------------------------------
inline void append_net_address(
std::vector<epee::net_utils::network_address> & seed_nodes
, std::string const & addr
)
{
using namespace boost::asio;
size_t pos = addr.find_last_of(':');
CHECK_AND_ASSERT_MES_NO_RET(std::string::npos != pos && addr.length() - 1 != pos && 0 != pos, "Failed to parse seed address from string: '" << addr << '\'');
std::string host = addr.substr(0, pos);
std::string port = addr.substr(pos + 1);
io_service io_srv;
ip::tcp::resolver resolver(io_srv);
ip::tcp::resolver::query query(host, port, boost::asio::ip::tcp::resolver::query::canonical_name);
boost::system::error_code ec;
ip::tcp::resolver::iterator i = resolver.resolve(query, ec);
CHECK_AND_ASSERT_MES_NO_RET(!ec, "Failed to resolve host name '" << host << "': " << ec.message() << ':' << ec.value());
ip::tcp::resolver::iterator iend;
for (; i != iend; ++i)
{
ip::tcp::endpoint endpoint = *i;
if (endpoint.address().is_v4())
{
epee::net_utils::network_address na(new epee::net_utils::ipv4_network_address(boost::asio::detail::socket_ops::host_to_network_long(endpoint.address().to_v4().to_ulong()), endpoint.port()));
seed_nodes.push_back(na);
MINFO("Added seed node: " << na.str());
}
else
{
MWARNING("IPv6 unsupported, skip '" << host << "' -> " << endpoint.address().to_v6().to_string(ec));
throw std::runtime_error("IPv6 unsupported");
}
}
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
std::set<std::string> node_server<t_payload_net_handler>::get_seed_nodes(bool testnet) const
{
std::set<std::string> full_addrs;
if (testnet)
{
full_addrs.insert("212.83.175.67:28080");
full_addrs.insert("5.9.100.248:28080");
full_addrs.insert("163.172.182.165:28080");
full_addrs.insert("195.154.123.123:28080");
full_addrs.insert("212.83.172.165:28080");
}
else
{
full_addrs.insert("107.152.130.98:18080");
full_addrs.insert("212.83.175.67:18080");
full_addrs.insert("5.9.100.248:18080");
full_addrs.insert("163.172.182.165:18080");
full_addrs.insert("161.67.132.39:18080");
full_addrs.insert("198.74.231.92:18080");
full_addrs.insert("195.154.123.123:28080");
full_addrs.insert("212.83.172.165:28080");
}
return full_addrs;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::init(const boost::program_options::variables_map& vm)
{
std::set<std::string> full_addrs;
m_testnet = command_line::get_arg(vm, command_line::arg_testnet_on);
if (m_testnet)
{
memcpy(&m_network_id, &::config::testnet::NETWORK_ID, 16);
full_addrs = get_seed_nodes(true);
}
else
{
memcpy(&m_network_id, &::config::NETWORK_ID, 16);
// for each hostname in the seed nodes list, attempt to DNS resolve and
// add the result addresses as seed nodes
// TODO: at some point add IPv6 support, but that won't be relevant
// for some time yet.
std::vector<std::vector<std::string>> dns_results;
dns_results.resize(m_seed_nodes_list.size());
std::list<boost::thread> dns_threads;
uint64_t result_index = 0;
for (const std::string& addr_str : m_seed_nodes_list)
{
boost::thread th = boost::thread([=, &dns_results, &addr_str]
{
MDEBUG("dns_threads[" << result_index << "] created for: " << addr_str);
// TODO: care about dnssec avail/valid
bool avail, valid;
std::vector<std::string> addr_list;
try
{
addr_list = tools::DNSResolver::instance().get_ipv4(addr_str, avail, valid);
MDEBUG("dns_threads[" << result_index << "] DNS resolve done");
boost::this_thread::interruption_point();
}
catch(const boost::thread_interrupted&)
{
// thread interruption request
// even if we now have results, finish thread without setting
// result variables, which are now out of scope in main thread
MWARNING("dns_threads[" << result_index << "] interrupted");
return;
}
MINFO("dns_threads[" << result_index << "] addr_str: " << addr_str << " number of results: " << addr_list.size());
dns_results[result_index] = addr_list;
});
dns_threads.push_back(std::move(th));
++result_index;
}
MDEBUG("dns_threads created, now waiting for completion or timeout of " << CRYPTONOTE_DNS_TIMEOUT_MS << "ms");
boost::chrono::system_clock::time_point deadline = boost::chrono::system_clock::now() + boost::chrono::milliseconds(CRYPTONOTE_DNS_TIMEOUT_MS);
uint64_t i = 0;
for (boost::thread& th : dns_threads)
{
if (! th.try_join_until(deadline))
{
MWARNING("dns_threads[" << i << "] timed out, sending interrupt");
th.interrupt();
}
++i;
}
i = 0;
for (const auto& result : dns_results)
{
MDEBUG("DNS lookup for " << m_seed_nodes_list[i] << ": " << result.size() << " results");
// if no results for node, thread's lookup likely timed out
if (result.size())
{
for (const auto& addr_string : result)
full_addrs.insert(addr_string + ":18080");
}
++i;
}
// append the fallback nodes if we have too few seed nodes to start with
if (full_addrs.size() < MIN_WANTED_SEED_NODES)
{
if (full_addrs.empty())
MINFO("DNS seed node lookup either timed out or failed, falling back to defaults");
else
MINFO("Not enough DNS seed nodes found, using fallback defaults too");
for (const auto &peer: get_seed_nodes(false))
full_addrs.insert(peer);
}
}
for (const auto& full_addr : full_addrs)
{
MDEBUG("Seed node: " << full_addr);
append_net_address(m_seed_nodes, full_addr);
}
MDEBUG("Number of seed nodes: " << m_seed_nodes.size());
bool res = handle_command_line(vm);
CHECK_AND_ASSERT_MES(res, false, "Failed to handle command line");
auto config_arg = m_testnet ? command_line::arg_testnet_data_dir : command_line::arg_data_dir;
m_config_folder = command_line::get_arg(vm, config_arg);
if ((!m_testnet && m_port != std::to_string(::config::P2P_DEFAULT_PORT))
|| (m_testnet && m_port != std::to_string(::config::testnet::P2P_DEFAULT_PORT))) {
m_config_folder = m_config_folder + "/" + m_port;
}
res = init_config();
CHECK_AND_ASSERT_MES(res, false, "Failed to init config.");
res = m_peerlist.init(m_allow_local_ip);
CHECK_AND_ASSERT_MES(res, false, "Failed to init peerlist.");
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.set_threads_prefix("P2P");
m_net_server.get_config_object().m_pcommands_handler = this;
m_net_server.get_config_object().m_invoke_timeout = P2P_DEFAULT_INVOKE_TIMEOUT;
m_net_server.set_connection_filter(this);
// from here onwards, it's online stuff
if (m_offline)
return res;
//try to bind
MINFO("Binding on " << m_bind_ip << ":" << m_port);
res = m_net_server.init_server(m_port, m_bind_ip);
CHECK_AND_ASSERT_MES(res, false, "Failed to bind server");
m_listenning_port = m_net_server.get_binded_port();
MLOG_GREEN(el::Level::Info, "Net service bound to " << m_bind_ip << ":" << m_listenning_port);
if(m_external_port)
MDEBUG("External port defined as " << m_external_port);
// Add UPnP port mapping
if(m_no_igd == false) {
MDEBUG("Attempting to add IGD port mapping.");
int result;
#if MINIUPNPC_API_VERSION > 13
// default according to miniupnpc.h
unsigned char ttl = 2;
UPNPDev* deviceList = upnpDiscover(1000, NULL, NULL, 0, 0, ttl, &result);
#else
UPNPDev* deviceList = upnpDiscover(1000, NULL, NULL, 0, 0, &result);
#endif
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 << m_listenning_port;
// Delete the port mapping before we create it, just in case we have dangling port mapping from the daemon not being shut down correctly
UPNP_DeletePortMapping(urls.controlURL, igdData.first.servicetype, portString.str().c_str(), "TCP", 0);
int portMappingResult;
portMappingResult = UPNP_AddPortMapping(urls.controlURL, igdData.first.servicetype, portString.str().c_str(), portString.str().c_str(), lanAddress, CRYPTONOTE_NAME, "TCP", 0, "0");
if (portMappingResult != 0) {
LOG_ERROR("UPNP_AddPortMapping failed, error: " << strupnperror(portMappingResult));
} else {
MLOG_GREEN(el::Level::Info, "Added IGD port mapping.");
}
} else if (result == 2) {
MWARNING("IGD was found but reported as not connected.");
} else if (result == 3) {
MWARNING("UPnP device was found but not recognized as IGD.");
} else {
MWARNING("UPNP_GetValidIGD returned an unknown result code.");
}
FreeUPNPUrls(&urls);
} else {
MINFO("No IGD was found.");
}
}
return res;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
typename node_server<t_payload_net_handler>::payload_net_handler& node_server<t_payload_net_handler>::get_payload_object()
{
return m_payload_handler;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::run()
{
// creating thread to log number of connections
mPeersLoggerThread.reset(new boost::thread([&]()
{
_note("Thread monitor number of peers - start");
while (!is_closing && !m_net_server.is_stop_signal_sent())
{ // main loop of thread
//number_of_peers = m_net_server.get_config_object().get_connections_count();
unsigned int number_of_peers = 0;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if (!cntxt.m_is_income) ++number_of_peers;
return true;
}); // lambda
m_current_number_of_out_peers = number_of_peers;
boost::this_thread::sleep_for(boost::chrono::seconds(1));
} // main loop of thread
_note("Thread monitor number of peers - done");
})); // lambda
//here you can set worker threads count
int thrds_count = 10;
m_net_server.add_idle_handler(boost::bind(&node_server<t_payload_net_handler>::idle_worker, this), 1000);
m_net_server.add_idle_handler(boost::bind(&t_payload_net_handler::on_idle, &m_payload_handler), 1000);
boost::thread::attributes attrs;
attrs.set_stack_size(THREAD_STACK_SIZE);
//go to loop
MINFO("Run net_service loop( " << thrds_count << " threads)...");
if(!m_net_server.run_server(thrds_count, true, attrs))
{
LOG_ERROR("Failed to run net tcp server!");
}
MINFO("net_service loop stopped.");
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
uint64_t node_server<t_payload_net_handler>::get_connections_count()
{
return m_net_server.get_config_object().get_connections_count();
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::deinit()
{
kill();
m_peerlist.deinit();
m_net_server.deinit_server();
return store_config();
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::store_config()
{
TRY_ENTRY();
if (!tools::create_directories_if_necessary(m_config_folder))
{
MWARNING("Failed to create data directory: " << m_config_folder);
return false;
}
std::string state_file_path = m_config_folder + "/" + 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())
{
MWARNING("Failed to save config to file " << state_file_path);
return false;
};
boost::archive::portable_binary_oarchive a(p2p_data);
a << *this;
return true;
CATCH_ENTRY_L0("blockchain_storage::save", false);
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::send_stop_signal()
{
std::list<boost::uuids::uuid> connection_ids;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt) {
connection_ids.push_back(cntxt.m_connection_id);
return true;
});
for (const auto &connection_id: connection_ids)
m_net_server.get_config_object().close(connection_id);
m_payload_handler.stop();
m_net_server.send_stop_signal();
MDEBUG("[node] Stop signal sent");
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::do_handshake_with_peer(peerid_type& pi, p2p_connection_context& context_, bool just_take_peerlist)
{
typename COMMAND_HANDSHAKE::request arg;
typename COMMAND_HANDSHAKE::response rsp;
get_local_node_data(arg.node_data);
m_payload_handler.get_payload_sync_data(arg.payload_data);
epee::simple_event ev;
std::atomic<bool> hsh_result(false);
bool r = epee::net_utils::async_invoke_remote_command2<typename COMMAND_HANDSHAKE::response>(context_.m_connection_id, COMMAND_HANDSHAKE::ID, arg, m_net_server.get_config_object(),
[this, &pi, &ev, &hsh_result, &just_take_peerlist](int code, const typename COMMAND_HANDSHAKE::response& rsp, p2p_connection_context& context)
{
epee::misc_utils::auto_scope_leave_caller scope_exit_handler = epee::misc_utils::create_scope_leave_handler([&](){ev.raise();});
if(code < 0)
{
LOG_WARNING_CC(context, "COMMAND_HANDSHAKE invoke failed. (" << code << ", " << epee::levin::get_err_descr(code) << ")");
return;
}
if(rsp.node_data.network_id != m_network_id)
{
LOG_WARNING_CC(context, "COMMAND_HANDSHAKE Failed, wrong network! (" << epee::string_tools::get_str_from_guid_a(rsp.node_data.network_id) << "), closing connection.");
return;
}
if(!handle_remote_peerlist(rsp.local_peerlist_new, rsp.node_data.local_time, context))
{
LOG_WARNING_CC(context, "COMMAND_HANDSHAKE: failed to handle_remote_peerlist(...), closing connection.");
add_host_fail(context.m_remote_address);
return;
}
hsh_result = true;
if(!just_take_peerlist)
{
if(!m_payload_handler.process_payload_sync_data(rsp.payload_data, context, true))
{
LOG_WARNING_CC(context, "COMMAND_HANDSHAKE invoked, but process_payload_sync_data returned false, dropping connection.");
hsh_result = false;
return;
}
pi = context.peer_id = rsp.node_data.peer_id;
m_peerlist.set_peer_just_seen(rsp.node_data.peer_id, context.m_remote_address);
if(rsp.node_data.peer_id == m_config.m_peer_id)
{
LOG_DEBUG_CC(context, "Connection to self detected, dropping connection");
hsh_result = false;
return;
}
LOG_DEBUG_CC(context, " COMMAND_HANDSHAKE INVOKED OK");
}else
{
LOG_DEBUG_CC(context, " COMMAND_HANDSHAKE(AND CLOSE) INVOKED OK");
}
}, P2P_DEFAULT_HANDSHAKE_INVOKE_TIMEOUT);
if(r)
{
ev.wait();
}
if(!hsh_result)
{
LOG_WARNING_CC(context_, "COMMAND_HANDSHAKE Failed");
m_net_server.get_config_object().close(context_.m_connection_id);
}
else
{
try_get_support_flags(context_, [](p2p_connection_context& flags_context, const uint32_t& support_flags)
{
flags_context.support_flags = support_flags;
});
}
return hsh_result;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::do_peer_timed_sync(const epee::net_utils::connection_context_base& context_, peerid_type peer_id)
{
typename COMMAND_TIMED_SYNC::request arg = AUTO_VAL_INIT(arg);
m_payload_handler.get_payload_sync_data(arg.payload_data);
bool r = epee::net_utils::async_invoke_remote_command2<typename COMMAND_TIMED_SYNC::response>(context_.m_connection_id, COMMAND_TIMED_SYNC::ID, arg, m_net_server.get_config_object(),
[this](int code, const typename COMMAND_TIMED_SYNC::response& rsp, p2p_connection_context& context)
{
context.m_in_timedsync = false;
if(code < 0)
{
LOG_WARNING_CC(context, "COMMAND_TIMED_SYNC invoke failed. (" << code << ", " << epee::levin::get_err_descr(code) << ")");
return;
}
if(!handle_remote_peerlist(rsp.local_peerlist_new, rsp.local_time, context))
{
LOG_WARNING_CC(context, "COMMAND_TIMED_SYNC: failed to handle_remote_peerlist(...), closing connection.");
m_net_server.get_config_object().close(context.m_connection_id );
add_host_fail(context.m_remote_address);
}
if(!context.m_is_income)
m_peerlist.set_peer_just_seen(context.peer_id, context.m_remote_address);
m_payload_handler.process_payload_sync_data(rsp.payload_data, context, false);
});
if(!r)
{
LOG_WARNING_CC(context_, "COMMAND_TIMED_SYNC Failed");
return false;
}
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
size_t node_server<t_payload_net_handler>::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);
size_t res = (x*x*x)/(max_index*max_index); //parabola \/
MDEBUG("Random connection index=" << res << "(x="<< x << ", max_index=" << max_index << ")");
return res;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::is_peer_used(const peerlist_entry& peer)
{
if(m_config.m_peer_id == peer.id)
return true;//dont make connections to ourself
bool used = false;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if(cntxt.peer_id == peer.id || (!cntxt.m_is_income && peer.adr == cntxt.m_remote_address))
{
used = true;
return false;//stop enumerating
}
return true;
});
return used;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::is_peer_used(const anchor_peerlist_entry& peer)
{
if(m_config.m_peer_id == peer.id) {
return true;//dont make connections to ourself
}
bool used = false;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if(cntxt.peer_id == peer.id || (!cntxt.m_is_income && peer.adr == cntxt.m_remote_address))
{
used = true;
return false;//stop enumerating
}
return true;
});
return used;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::is_addr_connected(const epee::net_utils::network_address& peer)
{
bool connected = false;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if(!cntxt.m_is_income && peer == cntxt.m_remote_address)
{
connected = true;
return false;//stop enumerating
}
return true;
});
return connected;
}
#define LOG_PRINT_CC_PRIORITY_NODE(priority, con, msg) \
do { \
if (priority) {\
LOG_INFO_CC(con, "[priority]" << msg); \
} else {\
LOG_INFO_CC(con, msg); \
} \
} while(0)
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::try_to_connect_and_handshake_with_new_peer(const epee::net_utils::network_address& na, bool just_take_peerlist, uint64_t last_seen_stamp, PeerType peer_type, uint64_t first_seen_stamp)
{
if (m_current_number_of_out_peers == m_config.m_net_config.connections_count) // out peers limit
{
return false;
}
else if (m_current_number_of_out_peers > m_config.m_net_config.connections_count)
{
m_net_server.get_config_object().del_out_connections(1);
m_current_number_of_out_peers --; // atomic variable, update time = 1s
return false;
}
MDEBUG("Connecting to " << na.str() << "(peer_type=" << peer_type << ", last_seen: "
<< (last_seen_stamp ? epee::misc_utils::get_time_interval_string(time(NULL) - last_seen_stamp):"never")
<< ")...");
CHECK_AND_ASSERT_MES(na.get_type_id() == epee::net_utils::ipv4_network_address::ID, false,
"Only IPv4 addresses are supported here");
const epee::net_utils::ipv4_network_address &ipv4 = na.as<const epee::net_utils::ipv4_network_address>();
typename net_server::t_connection_context con = AUTO_VAL_INIT(con);
bool res = m_net_server.connect(epee::string_tools::get_ip_string_from_int32(ipv4.ip()),
epee::string_tools::num_to_string_fast(ipv4.port()),
m_config.m_net_config.connection_timeout,
con);
if(!res)
{
bool is_priority = is_priority_node(na);
LOG_PRINT_CC_PRIORITY_NODE(is_priority, con, "Connect failed to " << na.str()
/*<< ", try " << try_count*/);
//m_peerlist.set_peer_unreachable(pe);
return false;
}
peerid_type pi = AUTO_VAL_INIT(pi);
res = do_handshake_with_peer(pi, con, just_take_peerlist);
if(!res)
{
bool is_priority = is_priority_node(na);
LOG_PRINT_CC_PRIORITY_NODE(is_priority, con, "Failed to HANDSHAKE with peer "
<< na.str()
/*<< ", try " << try_count*/);
return false;
}
if(just_take_peerlist)
{
m_net_server.get_config_object().close(con.m_connection_id);
LOG_DEBUG_CC(con, "CONNECTION HANDSHAKED OK AND CLOSED.");
return true;
}
peerlist_entry pe_local = AUTO_VAL_INIT(pe_local);
pe_local.adr = na;
pe_local.id = pi;
time_t last_seen;
time(&last_seen);
pe_local.last_seen = static_cast<int64_t>(last_seen);
m_peerlist.append_with_peer_white(pe_local);
//update last seen and push it to peerlist manager
anchor_peerlist_entry ape = AUTO_VAL_INIT(ape);
ape.adr = na;
ape.id = pi;
ape.first_seen = first_seen_stamp ? first_seen_stamp : time(nullptr);
m_peerlist.append_with_peer_anchor(ape);
LOG_DEBUG_CC(con, "CONNECTION HANDSHAKED OK.");
return true;
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::check_connection_and_handshake_with_peer(const epee::net_utils::network_address& na, uint64_t last_seen_stamp)
{
LOG_PRINT_L1("Connecting to " << na.str() << "(last_seen: "
<< (last_seen_stamp ? epee::misc_utils::get_time_interval_string(time(NULL) - last_seen_stamp):"never")
<< ")...");
CHECK_AND_ASSERT_MES(na.get_type_id() == epee::net_utils::ipv4_network_address::ID, false,
"Only IPv4 addresses are supported here");
const epee::net_utils::ipv4_network_address &ipv4 = na.as<epee::net_utils::ipv4_network_address>();
typename net_server::t_connection_context con = AUTO_VAL_INIT(con);
bool res = m_net_server.connect(epee::string_tools::get_ip_string_from_int32(ipv4.ip()),
epee::string_tools::num_to_string_fast(ipv4.port()),
m_config.m_net_config.connection_timeout,
con);
if (!res) {
bool is_priority = is_priority_node(na);
LOG_PRINT_CC_PRIORITY_NODE(is_priority, con, "Connect failed to " << na.str());
return false;
}
peerid_type pi = AUTO_VAL_INIT(pi);
res = do_handshake_with_peer(pi, con, true);
if (!res) {
bool is_priority = is_priority_node(na);
LOG_PRINT_CC_PRIORITY_NODE(is_priority, con, "Failed to HANDSHAKE with peer " << na.str());
return false;
}
m_net_server.get_config_object().close(con.m_connection_id);
LOG_DEBUG_CC(con, "CONNECTION HANDSHAKED OK AND CLOSED.");
return true;
}
#undef LOG_PRINT_CC_PRIORITY_NODE
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::is_addr_recently_failed(const epee::net_utils::network_address& addr)
{
CRITICAL_REGION_LOCAL(m_conn_fails_cache_lock);
auto it = m_conn_fails_cache.find(addr);
if(it == m_conn_fails_cache.end())
return false;
if(time(NULL) - it->second > P2P_FAILED_ADDR_FORGET_SECONDS)
return false;
else
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::make_new_connection_from_anchor_peerlist(const std::vector<anchor_peerlist_entry>& anchor_peerlist)
{
for (const auto& pe: anchor_peerlist) {
_note("Considering connecting (out) to peer: " << pe.id << " " << pe.adr.str());
if(is_peer_used(pe)) {
_note("Peer is used");
continue;
}
if(!is_remote_host_allowed(pe.adr)) {
continue;
}
if(is_addr_recently_failed(pe.adr)) {
continue;
}
MDEBUG("Selected peer: " << pe.id << " " << pe.adr.str()
<< "[peer_type=" << anchor
<< "] first_seen: " << epee::misc_utils::get_time_interval_string(time(NULL) - pe.first_seen));
if(!try_to_connect_and_handshake_with_new_peer(pe.adr, false, 0, anchor, pe.first_seen)) {
_note("Handshake failed");
continue;
}
return true;
}
return false;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::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_net_server.is_stop_signal_sent())
{
++rand_count;
size_t random_index;
if (use_white_list) {
local_peers_count = m_peerlist.get_white_peers_count();
max_random_index = std::min<uint64_t>(local_peers_count -1, 20);
random_index = get_random_index_with_fixed_probability(max_random_index);
} else {
random_index = crypto::rand<size_t>() % m_peerlist.get_gray_peers_count();
}
CHECK_AND_ASSERT_MES(random_index < local_peers_count, false, "random_starter_index < peers_local.size() failed!!");
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);
CHECK_AND_ASSERT_MES(r, false, "Failed to get random peer from peerlist(white:" << use_white_list << ")");
++try_count;
_note("Considering connecting (out) to peer: " << pe.id << " " << pe.adr.str());
if(is_peer_used(pe)) {
_note("Peer is used");
continue;
}
if(!is_remote_host_allowed(pe.adr))
continue;
if(is_addr_recently_failed(pe.adr))
continue;
MDEBUG("Selected peer: " << pe.id << " " << pe.adr.str()
<< "[peer_list=" << (use_white_list ? white : gray)
<< "] last_seen: " << (pe.last_seen ? epee::misc_utils::get_time_interval_string(time(NULL) - pe.last_seen) : "never"));
if(!try_to_connect_and_handshake_with_new_peer(pe.adr, false, pe.last_seen, use_white_list ? white : gray)) {
_note("Handshake failed");
continue;
}
return true;
}
return false;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::connect_to_seed()
{
if (m_seed_nodes.empty())
return true;
size_t try_count = 0;
size_t current_index = crypto::rand<size_t>()%m_seed_nodes.size();
bool fallback_nodes_added = false;
while(true)
{
if(m_net_server.is_stop_signal_sent())
return false;
if(try_to_connect_and_handshake_with_new_peer(m_seed_nodes[current_index], true))
break;
if(++try_count > m_seed_nodes.size())
{
if (!fallback_nodes_added)
{
MWARNING("Failed to connect to any of seed peers, trying fallback seeds");
for (const auto &peer: get_seed_nodes(m_testnet))
{
MDEBUG("Fallback seed node: " << peer);
append_net_address(m_seed_nodes, peer);
}
fallback_nodes_added = true;
// continue for another few cycles
}
else
{
MWARNING("Failed to connect to any of seed peers, continuing without seeds");
break;
}
}
if(++current_index >= m_seed_nodes.size())
current_index = 0;
}
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::connections_maker()
{
if (!connect_to_peerlist(m_exclusive_peers)) return false;
if (!m_exclusive_peers.empty()) return true;
size_t start_conn_count = get_outgoing_connections_count();
if(!m_peerlist.get_white_peers_count() && m_seed_nodes.size())
{
if (!connect_to_seed())
return false;
}
if (!connect_to_peerlist(m_priority_peers)) return false;
size_t expected_white_connections = (m_config.m_net_config.connections_count*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 anchor list
if(!make_expected_connections_count(anchor, P2P_DEFAULT_ANCHOR_CONNECTIONS_COUNT))
return false;
//then do white list
if(!make_expected_connections_count(white, expected_white_connections))
return false;
//then do grey list
if(!make_expected_connections_count(gray, m_config.m_net_config.connections_count))
return false;
}else
{
//start from grey list
if(!make_expected_connections_count(gray, m_config.m_net_config.connections_count))
return false;
//and then do white list
if(!make_expected_connections_count(white, m_config.m_net_config.connections_count))
return false;
}
}
if (start_conn_count == get_outgoing_connections_count() && start_conn_count < m_config.m_net_config.connections_count)
{
MINFO("Failed to connect to any, trying seeds");
if (!connect_to_seed())
return false;
}
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::make_expected_connections_count(PeerType peer_type, size_t expected_connections)
{
if (m_offline)
return true;
std::vector<anchor_peerlist_entry> apl;
if (peer_type == anchor) {
m_peerlist.get_and_empty_anchor_peerlist(apl);
}
size_t conn_count = get_outgoing_connections_count();
//add new connections from white peers
while(conn_count < expected_connections)
{
if(m_net_server.is_stop_signal_sent())
return false;
if (peer_type == anchor && !make_new_connection_from_anchor_peerlist(apl)) {
break;
}
if (peer_type == white && !make_new_connection_from_peerlist(true)) {
break;
}
if (peer_type == gray && !make_new_connection_from_peerlist(false)) {
break;
}
conn_count = get_outgoing_connections_count();
}
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
size_t node_server<t_payload_net_handler>::get_outgoing_connections_count()
{
size_t count = 0;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if(!cntxt.m_is_income)
++count;
return true;
});
return count;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::idle_worker()
{
m_peer_handshake_idle_maker_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::peer_sync_idle_maker, this));
m_connections_maker_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::connections_maker, this));
m_gray_peerlist_housekeeping_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::gray_peerlist_housekeeping, this));
m_peerlist_store_interval.do_call(boost::bind(&node_server<t_payload_net_handler>::store_config, this));
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::peer_sync_idle_maker()
{
MDEBUG("STARTED PEERLIST IDLE HANDSHAKE");
typedef std::list<std::pair<epee::net_utils::connection_context_base, peerid_type> > local_connects_type;
local_connects_type cncts;
m_net_server.get_config_object().foreach_connection([&](p2p_connection_context& cntxt)
{
if(cntxt.peer_id && !cntxt.m_in_timedsync)
{
cntxt.m_in_timedsync = true;
cncts.push_back(local_connects_type::value_type(cntxt, cntxt.peer_id));//do idle sync only with handshaked connections
}
return true;
});
std::for_each(cncts.begin(), cncts.end(), [&](const typename local_connects_type::value_type& vl){do_peer_timed_sync(vl.first, vl.second);});
MDEBUG("FINISHED PEERLIST IDLE HANDSHAKE");
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::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;
for(peerlist_entry& be: local_peerlist)
{
if(be.last_seen > local_time)
{
MWARNING("FOUND FUTURE peerlist for entry " << be.adr.str() << " last_seen: " << be.last_seen << ", local_time(on remote node):" << local_time);
return false;
}
be.last_seen += delta;
}
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::handle_remote_peerlist(const std::list<peerlist_entry>& peerlist, time_t local_time, const epee::net_utils::connection_context_base& context)
{
int64_t delta = 0;
std::list<peerlist_entry> peerlist_ = peerlist;
if(!fix_time_delta(peerlist_, local_time, delta))
return false;
LOG_DEBUG_CC(context, "REMOTE PEERLIST: TIME_DELTA: " << delta << ", remote peerlist size=" << peerlist_.size());
LOG_DEBUG_CC(context, "REMOTE PEERLIST: " << print_peerlist_to_string(peerlist_));
return m_peerlist.merge_peerlist(peerlist_);
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::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_listenning_port;
else
node_data.my_port = 0;
node_data.network_id = m_network_id;
return true;
}
//-----------------------------------------------------------------------------------
#ifdef ALLOW_DEBUG_COMMANDS
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::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 )
{
MWARNING("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 )
{
MWARNING("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)
{
MWARNING("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);
epee::string_tools::hex_to_pod(::config::P2P_REMOTE_DEBUG_TRUSTED_PUB_KEY, pk);
crypto::hash h = get_proof_of_trust_hash(tr);
if(!crypto::check_signature(h, pk, tr.sign))
{
MWARNING("check_trust failed: sign check failed");
return false;
}
//update last request time
m_last_stat_request_time = tr.time;
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
int node_server<t_payload_net_handler>::handle_get_stat_info(int command, typename COMMAND_REQUEST_STAT_INFO::request& arg, typename COMMAND_REQUEST_STAT_INFO::response& rsp, p2p_connection_context& context)
{
if(!check_trust(arg.tr))
{
drop_connection(context);
return 1;
}
rsp.connections_count = m_net_server.get_config_object().get_connections_count();
rsp.incoming_connections_count = rsp.connections_count - get_outgoing_connections_count();
rsp.version = MONERO_VERSION_FULL;
rsp.os_version = tools::get_os_version_string();
m_payload_handler.get_stat_info(rsp.payload_info);
return 1;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
int node_server<t_payload_net_handler>::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))
{
drop_connection(context);
return 1;
}
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
connection_entry ce;
ce.adr = cntxt.m_remote_address;
ce.id = cntxt.peer_id;
ce.is_income = cntxt.m_is_income;
rsp.connections_list.push_back(ce);
return true;
});
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;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
int node_server<t_payload_net_handler>::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
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
int node_server<t_payload_net_handler>::handle_get_support_flags(int command, COMMAND_REQUEST_SUPPORT_FLAGS::request& arg, COMMAND_REQUEST_SUPPORT_FLAGS::response& rsp, p2p_connection_context& context)
{
rsp.support_flags = m_config.m_support_flags;
return 1;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
void node_server<t_payload_net_handler>::request_callback(const epee::net_utils::connection_context_base& context)
{
m_net_server.get_config_object().request_callback(context.m_connection_id);
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::relay_notify_to_list(int command, const std::string& data_buff, const std::list<boost::uuids::uuid> &connections)
{
for(const auto& c_id: connections)
{
m_net_server.get_config_object().notify(command, data_buff, c_id);
}
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::relay_notify_to_all(int command, const std::string& data_buff, const epee::net_utils::connection_context_base& context)
{
std::list<boost::uuids::uuid> connections;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if(cntxt.peer_id && context.m_connection_id != cntxt.m_connection_id)
connections.push_back(cntxt.m_connection_id);
return true;
});
return relay_notify_to_list(command, data_buff, connections);
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
void node_server<t_payload_net_handler>::callback(p2p_connection_context& context)
{
m_payload_handler.on_callback(context);
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::invoke_notify_to_peer(int command, const std::string& req_buff, const epee::net_utils::connection_context_base& context)
{
int res = m_net_server.get_config_object().notify(command, req_buff, context.m_connection_id);
return res > 0;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::invoke_command_to_peer(int command, const std::string& req_buff, std::string& resp_buff, const epee::net_utils::connection_context_base& context)
{
int res = m_net_server.get_config_object().invoke(command, req_buff, resp_buff, context.m_connection_id);
return res > 0;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::drop_connection(const epee::net_utils::connection_context_base& context)
{
m_net_server.get_config_object().close(context.m_connection_id);
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler> template<class t_callback>
bool node_server<t_payload_net_handler>::try_ping(basic_node_data& node_data, p2p_connection_context& context, t_callback cb)
{
if(!node_data.my_port)
return false;
CHECK_AND_ASSERT_MES(context.m_remote_address.get_type_id() == epee::net_utils::ipv4_network_address::ID, false,
"Only IPv4 addresses are supported here");
const epee::net_utils::network_address na = context.m_remote_address;
uint32_t actual_ip = na.as<const epee::net_utils::ipv4_network_address>().ip();
if(!m_peerlist.is_host_allowed(context.m_remote_address))
return false;
std::string ip = epee::string_tools::get_ip_string_from_int32(actual_ip);
std::string port = epee::string_tools::num_to_string_fast(node_data.my_port);
epee::net_utils::network_address address(new epee::net_utils::ipv4_network_address(actual_ip, node_data.my_port));
peerid_type pr = node_data.peer_id;
bool r = m_net_server.connect_async(ip, port, m_config.m_net_config.ping_connection_timeout, [cb, /*context,*/ address, pr, this](
const typename net_server::t_connection_context& ping_context,
const boost::system::error_code& ec)->bool
{
if(ec)
{
LOG_WARNING_CC(ping_context, "back ping connect failed to " << address.str());
return false;
}
COMMAND_PING::request req;
COMMAND_PING::response rsp;
//vc2010 workaround
/*std::string ip_ = ip;
std::string port_=port;
peerid_type pr_ = pr;
auto cb_ = cb;*/
// GCC 5.1.0 gives error with second use of uint64_t (peerid_type) variable.
peerid_type pr_ = pr;
bool inv_call_res = epee::net_utils::async_invoke_remote_command2<COMMAND_PING::response>(ping_context.m_connection_id, COMMAND_PING::ID, req, m_net_server.get_config_object(),
[=](int code, const COMMAND_PING::response& rsp, p2p_connection_context& context)
{
if(code <= 0)
{
LOG_WARNING_CC(ping_context, "Failed to invoke COMMAND_PING to " << address.str() << "(" << code << ", " << epee::levin::get_err_descr(code) << ")");
return;
}
if(rsp.status != PING_OK_RESPONSE_STATUS_TEXT || pr != rsp.peer_id)
{
LOG_WARNING_CC(ping_context, "back ping invoke wrong response \"" << rsp.status << "\" from" << address.str() << ", hsh_peer_id=" << pr_ << ", rsp.peer_id=" << rsp.peer_id);
m_net_server.get_config_object().close(ping_context.m_connection_id);
return;
}
m_net_server.get_config_object().close(ping_context.m_connection_id);
cb();
});
if(!inv_call_res)
{
LOG_WARNING_CC(ping_context, "back ping invoke failed to " << address.str());
m_net_server.get_config_object().close(ping_context.m_connection_id);
return false;
}
return true;
});
if(!r)
{
LOG_WARNING_CC(context, "Failed to call connect_async, network error.");
}
return r;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::try_get_support_flags(const p2p_connection_context& context, std::function<void(p2p_connection_context&, const uint32_t&)> f)
{
COMMAND_REQUEST_SUPPORT_FLAGS::request support_flags_request;
bool r = epee::net_utils::async_invoke_remote_command2<typename COMMAND_REQUEST_SUPPORT_FLAGS::response>
(
context.m_connection_id,
COMMAND_REQUEST_SUPPORT_FLAGS::ID,
support_flags_request,
m_net_server.get_config_object(),
[=](int code, const typename COMMAND_REQUEST_SUPPORT_FLAGS::response& rsp, p2p_connection_context& context_)
{
if(code < 0)
{
LOG_WARNING_CC(context_, "COMMAND_REQUEST_SUPPORT_FLAGS invoke failed. (" << code << ", " << epee::levin::get_err_descr(code) << ")");
return;
}
f(context_, rsp.support_flags);
},
P2P_DEFAULT_HANDSHAKE_INVOKE_TIMEOUT
);
return r;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
int node_server<t_payload_net_handler>::handle_timed_sync(int command, typename COMMAND_TIMED_SYNC::request& arg, typename COMMAND_TIMED_SYNC::response& rsp, p2p_connection_context& context)
{
if(!m_payload_handler.process_payload_sync_data(arg.payload_data, context, false))
{
LOG_WARNING_CC(context, "Failed to process_payload_sync_data(), dropping connection");
drop_connection(context);
return 1;
}
//fill response
rsp.local_time = time(NULL);
m_peerlist.get_peerlist_head(rsp.local_peerlist_new);
m_payload_handler.get_payload_sync_data(rsp.payload_data);
LOG_DEBUG_CC(context, "COMMAND_TIMED_SYNC");
return 1;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
int node_server<t_payload_net_handler>::handle_handshake(int command, typename COMMAND_HANDSHAKE::request& arg, typename COMMAND_HANDSHAKE::response& rsp, p2p_connection_context& context)
{
if(arg.node_data.network_id != m_network_id)
{
LOG_INFO_CC(context, "WRONG NETWORK AGENT CONNECTED! id=" << epee::string_tools::get_str_from_guid_a(arg.node_data.network_id));
drop_connection(context);
add_host_fail(context.m_remote_address);
return 1;
}
if(!context.m_is_income)
{
LOG_WARNING_CC(context, "COMMAND_HANDSHAKE came not from incoming connection");
drop_connection(context);
add_host_fail(context.m_remote_address);
return 1;
}
if(context.peer_id)
{
LOG_WARNING_CC(context, "COMMAND_HANDSHAKE came, but seems that connection already have associated peer_id (double COMMAND_HANDSHAKE?)");
drop_connection(context);
return 1;
}
if(!m_payload_handler.process_payload_sync_data(arg.payload_data, context, true))
{
LOG_WARNING_CC(context, "COMMAND_HANDSHAKE came, but process_payload_sync_data returned false, dropping connection.");
drop_connection(context);
return 1;
}
if(has_too_many_connections(context.m_remote_address))
{
LOG_PRINT_CCONTEXT_L1("CONNECTION FROM " << context.m_remote_address.host_str() << " REFUSED, too many connections from the same address");
drop_connection(context);
return 1;
}
//associate peer_id with this connection
context.peer_id = arg.node_data.peer_id;
context.m_in_timedsync = false;
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;
//try ping to be sure that we can add this peer to peer_list
try_ping(arg.node_data, context, [peer_id_l, port_l, context, this]()
{
CHECK_AND_ASSERT_MES(context.m_remote_address.get_type_id() == epee::net_utils::ipv4_network_address::ID, void(),
"Only IPv4 addresses are supported here");
//called only(!) if success pinged, update local peerlist
peerlist_entry pe;
const epee::net_utils::network_address na = context.m_remote_address;
pe.adr.reset(new epee::net_utils::ipv4_network_address(na.as<epee::net_utils::ipv4_network_address>().ip(), port_l));
time_t last_seen;
time(&last_seen);
pe.last_seen = static_cast<int64_t>(last_seen);
pe.id = peer_id_l;
this->m_peerlist.append_with_peer_white(pe);
LOG_DEBUG_CC(context, "PING SUCCESS " << context.m_remote_address.host_str() << ":" << port_l);
});
}
try_get_support_flags(context, [](p2p_connection_context& flags_context, const uint32_t& support_flags)
{
flags_context.support_flags = support_flags;
});
//fill response
m_peerlist.get_peerlist_head(rsp.local_peerlist_new);
get_local_node_data(rsp.node_data);
m_payload_handler.get_payload_sync_data(rsp.payload_data);
LOG_DEBUG_CC(context, "COMMAND_HANDSHAKE");
return 1;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
int node_server<t_payload_net_handler>::handle_ping(int command, COMMAND_PING::request& arg, COMMAND_PING::response& rsp, p2p_connection_context& context)
{
LOG_DEBUG_CC(context, "COMMAND_PING");
rsp.status = PING_OK_RESPONSE_STATUS_TEXT;
rsp.peer_id = m_config.m_peer_id;
return 1;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::log_peerlist()
{
std::list<peerlist_entry> pl_white;
std::list<peerlist_entry> pl_gray;
m_peerlist.get_peerlist_full(pl_gray, pl_white);
MINFO(ENDL << "Peerlist white:" << ENDL << print_peerlist_to_string(pl_white) << ENDL << "Peerlist gray:" << ENDL << print_peerlist_to_string(pl_gray) );
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::log_connections()
{
MINFO("Connections: \r\n" << print_connections_container() );
return true;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
std::string node_server<t_payload_net_handler>::print_connections_container()
{
std::stringstream ss;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
ss << cntxt.m_remote_address.str()
<< " \t\tpeer_id " << cntxt.peer_id
<< " \t\tconn_id " << epee::string_tools::get_str_from_guid_a(cntxt.m_connection_id) << (cntxt.m_is_income ? " INC":" OUT")
<< std::endl;
return true;
});
std::string s = ss.str();
return s;
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
void node_server<t_payload_net_handler>::on_connection_new(p2p_connection_context& context)
{
MINFO("["<< epee::net_utils::print_connection_context(context) << "] NEW CONNECTION");
}
//-----------------------------------------------------------------------------------
template<class t_payload_net_handler>
void node_server<t_payload_net_handler>::on_connection_close(p2p_connection_context& context)
{
if (!m_net_server.is_stop_signal_sent() && !context.m_is_income) {
epee::net_utils::network_address na = AUTO_VAL_INIT(na);
na = context.m_remote_address;
m_peerlist.remove_from_peer_anchor(na);
}
m_payload_handler.on_connection_close(context);
MINFO("["<< epee::net_utils::print_connection_context(context) << "] CLOSE CONNECTION");
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::is_priority_node(const epee::net_utils::network_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());
}
template<class t_payload_net_handler> template <class Container>
bool node_server<t_payload_net_handler>::connect_to_peerlist(const Container& peers)
{
for(const epee::net_utils::network_address& na: peers)
{
if(m_net_server.is_stop_signal_sent())
return false;
if(is_addr_connected(na))
continue;
try_to_connect_and_handshake_with_new_peer(na);
}
return true;
}
template<class t_payload_net_handler> template <class Container>
bool node_server<t_payload_net_handler>::parse_peers_and_add_to_container(const boost::program_options::variables_map& vm, const command_line::arg_descriptor<std::vector<std::string> > & arg, Container& container)
{
std::vector<std::string> perrs = command_line::get_arg(vm, arg);
for(const std::string& pr_str: perrs)
{
epee::net_utils::network_address na = AUTO_VAL_INIT(na);
const uint16_t default_port = m_testnet ? ::config::testnet::P2P_DEFAULT_PORT : ::config::P2P_DEFAULT_PORT;
bool r = parse_peer_from_string(na, pr_str, default_port);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse address from string: " << pr_str);
container.push_back(na);
}
return true;
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::set_max_out_peers(const boost::program_options::variables_map& vm, int64_t max)
{
if(max == -1) {
m_config.m_net_config.connections_count = P2P_DEFAULT_CONNECTIONS_COUNT;
return true;
}
m_config.m_net_config.connections_count = max;
return true;
}
template<class t_payload_net_handler>
void node_server<t_payload_net_handler>::delete_connections(size_t count)
{
m_net_server.get_config_object().del_out_connections(count);
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::set_tos_flag(const boost::program_options::variables_map& vm, int flag)
{
if(flag==-1){
return true;
}
epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_tos_flag(flag);
_dbg1("Set ToS flag " << flag);
return true;
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::set_rate_up_limit(const boost::program_options::variables_map& vm, int64_t limit)
{
this->islimitup=true;
if (limit==-1) {
limit=default_limit_up;
this->islimitup=false;
}
limit *= 1024;
epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_up_limit( limit );
MINFO("Set limit-up to " << limit/1024 << " kB/s");
return true;
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::set_rate_down_limit(const boost::program_options::variables_map& vm, int64_t limit)
{
this->islimitdown=true;
if(limit==-1) {
limit=default_limit_down;
this->islimitdown=false;
}
limit *= 1024;
epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_down_limit( limit );
MINFO("Set limit-down to " << limit/1024 << " kB/s");
return true;
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::set_rate_limit(const boost::program_options::variables_map& vm, int64_t limit)
{
int64_t limit_up = 0;
int64_t limit_down = 0;
if(limit == -1)
{
limit_up = default_limit_up * 1024;
limit_down = default_limit_down * 1024;
}
else
{
limit_up = limit * 1024;
limit_down = limit * 1024;
}
if(!this->islimitup) {
epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_up_limit(limit_up);
MINFO("Set limit-up to " << limit_up/1024 << " kB/s");
}
if(!this->islimitdown) {
epee::net_utils::connection<epee::levin::async_protocol_handler<p2p_connection_context> >::set_rate_down_limit(limit_down);
MINFO("Set limit-down to " << limit_down/1024 << " kB/s");
}
return true;
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::has_too_many_connections(const epee::net_utils::network_address &address)
{
const uint8_t max_connections = 1;
uint8_t count = 0;
m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
{
if (cntxt.m_is_income && cntxt.m_remote_address.is_same_host(address)) {
count++;
if (count > max_connections) {
return false;
}
}
return true;
});
return count > max_connections;
}
template<class t_payload_net_handler>
bool node_server<t_payload_net_handler>::gray_peerlist_housekeeping()
{
peerlist_entry pe = AUTO_VAL_INIT(pe);
if (!m_peerlist.get_random_gray_peer(pe)) {
return false;
}
bool success = check_connection_and_handshake_with_peer(pe.adr, pe.last_seen);
if (!success) {
m_peerlist.remove_from_peer_gray(pe);
LOG_PRINT_L2("PEER EVICTED FROM GRAY PEER LIST IP address: " << pe.adr.host_str() << " Peer ID: " << std::hex << pe.id);
return true;
}
m_peerlist.set_peer_just_seen(pe.id, pe.adr);
LOG_PRINT_L2("PEER PROMOTED TO WHITE PEER LIST IP address: " << pe.adr.host_str() << " Peer ID: " << std::hex << pe.id);
return true;
}
}
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