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cryptonote_protocol_handler.inl
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/// @file
/// @author rfree (current maintainer/user in monero.cc project - most of code is from CryptoNote)
/// @brief This is the original cryptonote protocol network-events handler, modified by us
// Copyright (c) 2014-2024, 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
// (may contain code and/or modifications by other developers)
// developer rfree: this code is caller of our new network code, and is modded; e.g. for rate limiting
#include <list>
#include <ctime>
#include "cryptonote_basic/cryptonote_format_utils.h"
#include "profile_tools.h"
#include "net/network_throttle-detail.hpp"
#include "common/pruning.h"
#include "common/util.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net.cn"
#define MLOG_P2P_MESSAGE(x) MCINFO("net.p2p.msg", context << x)
#define MLOGIF_P2P_MESSAGE(init, test, x) \
do { \
const auto level = el::Level::Info; \
const char *cat = "net.p2p.msg"; \
if (ELPP->vRegistry()->allowed(level, cat)) { \
init; \
if (test) \
el::base::Writer(level, el::Color::Default, __FILE__, __LINE__, ELPP_FUNC, el::base::DispatchAction::NormalLog).construct(cat) << x; \
} \
} while(0)
#define MLOG_PEER_STATE(x) \
MCINFO(MONERO_DEFAULT_LOG_CATEGORY, context << "[" << epee::string_tools::to_string_hex(context.m_pruning_seed) << "] state: " << x << " in state " << cryptonote::get_protocol_state_string(context.m_state))
#define BLOCK_QUEUE_NSPANS_THRESHOLD 10 // chunks of N blocks
#define BLOCK_QUEUE_SIZE_THRESHOLD (100*1024*1024) // MB
#define BLOCK_QUEUE_FORCE_DOWNLOAD_NEAR_BLOCKS 1000
#define REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD_STANDBY (5 * 1000000) // microseconds
#define REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD (30 * 1000000) // microseconds
#define IDLE_PEER_KICK_TIME (240 * 1000000) // microseconds
#define NON_RESPONSIVE_PEER_KICK_TIME (20 * 1000000) // microseconds
#define PASSIVE_PEER_KICK_TIME (60 * 1000000) // microseconds
#define DROP_ON_SYNC_WEDGE_THRESHOLD (30 * 1000000000ull) // nanoseconds
#define LAST_ACTIVITY_STALL_THRESHOLD (2.0f) // seconds
#define DROP_PEERS_ON_SCORE -2
namespace cryptonote
{
//-----------------------------------------------------------------------------------------------------------------------
template<class t_core>
t_cryptonote_protocol_handler<t_core>::t_cryptonote_protocol_handler(t_core& rcore, nodetool::i_p2p_endpoint<connection_context>* p_net_layout, bool offline):m_core(rcore),
m_p2p(p_net_layout),
m_syncronized_connections_count(0),
m_synchronized(offline),
m_ask_for_txpool_complement(true),
m_stopping(false),
m_no_sync(false)
{
if(!m_p2p)
m_p2p = &m_p2p_stub;
}
//-----------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::init(const boost::program_options::variables_map& vm)
{
m_sync_timer.pause();
m_sync_timer.reset();
m_add_timer.pause();
m_add_timer.reset();
m_last_add_end_time = 0;
m_sync_spans_downloaded = 0;
m_sync_old_spans_downloaded = 0;
m_sync_bad_spans_downloaded = 0;
m_sync_download_chain_size = 0;
m_sync_download_objects_size = 0;
m_block_download_max_size = command_line::get_arg(vm, cryptonote::arg_block_download_max_size);
m_sync_pruned_blocks = command_line::get_arg(vm, cryptonote::arg_sync_pruned_blocks);
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::deinit()
{
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::set_p2p_endpoint(nodetool::i_p2p_endpoint<connection_context>* p2p)
{
if(p2p)
m_p2p = p2p;
else
m_p2p = &m_p2p_stub;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::on_callback(cryptonote_connection_context& context)
{
LOG_PRINT_CCONTEXT_L2("callback fired");
CHECK_AND_ASSERT_MES_CC( context.m_callback_request_count > 0, false, "false callback fired, but context.m_callback_request_count=" << context.m_callback_request_count);
--context.m_callback_request_count;
uint32_t notified = true;
if (context.m_idle_peer_notification.compare_exchange_strong(notified, not notified))
{
if (context.m_state == cryptonote_connection_context::state_synchronizing && context.m_last_request_time != boost::date_time::not_a_date_time)
{
const boost::posix_time::ptime now = boost::posix_time::microsec_clock::universal_time();
const boost::posix_time::time_duration dt = now - context.m_last_request_time;
const auto ms = dt.total_microseconds();
if (ms > IDLE_PEER_KICK_TIME || (context.m_expect_response && ms > NON_RESPONSIVE_PEER_KICK_TIME))
{
if (context.m_score-- >= 0)
{
MINFO(context << " kicking idle peer, last update " << (dt.total_microseconds() / 1.e6) << " seconds ago, expecting " << (int)context.m_expect_response);
context.m_last_request_time = boost::date_time::not_a_date_time;
context.m_expect_response = 0;
context.m_expect_height = 0;
context.m_requested_objects.clear();
context.m_state = cryptonote_connection_context::state_standby; // we'll go back to adding, then (if we can't), download
}
else
{
MINFO(context << "dropping idle peer with negative score");
drop_connection_with_score(context, context.m_expect_response == 0 ? 1 : 5, false);
return false;
}
}
}
}
notified = true;
if (context.m_new_stripe_notification.compare_exchange_strong(notified, not notified))
{
if (context.m_state == cryptonote_connection_context::state_normal)
context.m_state = cryptonote_connection_context::state_synchronizing;
}
if(context.m_state == cryptonote_connection_context::state_synchronizing && context.m_last_request_time == boost::posix_time::not_a_date_time)
{
NOTIFY_REQUEST_CHAIN::request r = {};
context.m_needed_objects.clear();
context.m_expect_height = m_core.get_current_blockchain_height();
m_core.get_short_chain_history(r.block_ids);
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
r.prune = m_sync_pruned_blocks;
context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
context.m_expect_response = NOTIFY_RESPONSE_CHAIN_ENTRY::ID;
MLOG_P2P_MESSAGE("-->>NOTIFY_REQUEST_CHAIN: m_block_ids.size()=" << r.block_ids.size() );
post_notify<NOTIFY_REQUEST_CHAIN>(r, context);
MLOG_PEER_STATE("requesting chain");
}
else if(context.m_state == cryptonote_connection_context::state_standby)
{
context.m_state = cryptonote_connection_context::state_synchronizing;
try_add_next_blocks(context);
}
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::log_connections()
{
std::stringstream ss;
ss.precision(1);
double down_sum = 0.0;
double down_curr_sum = 0.0;
double up_sum = 0.0;
double up_curr_sum = 0.0;
ss << std::setw(30) << std::left << "Remote Host"
<< std::setw(20) << "Peer id"
<< std::setw(20) << "Support Flags"
<< std::setw(30) << "Recv/Sent (inactive,sec)"
<< std::setw(25) << "State"
<< std::setw(20) << "Livetime(sec)"
<< std::setw(12) << "Down (kB/s)"
<< std::setw(14) << "Down(now)"
<< std::setw(10) << "Up (kB/s)"
<< std::setw(13) << "Up(now)"
<< ENDL;
m_p2p->for_each_connection([&](const connection_context& cntxt, nodetool::peerid_type peer_id, uint32_t support_flags)
{
bool local_ip = cntxt.m_remote_address.is_local();
auto connection_time = time(NULL) - cntxt.m_started;
ss << std::setw(30) << std::left << std::string(cntxt.m_is_income ? " [INC]":"[OUT]") +
cntxt.m_remote_address.str()
<< std::setw(20) << nodetool::peerid_to_string(peer_id)
<< std::setw(20) << std::hex << support_flags
<< std::setw(30) << std::to_string(cntxt.m_recv_cnt)+ "(" + std::to_string(time(NULL) - cntxt.m_last_recv) + ")" + "/" + std::to_string(cntxt.m_send_cnt) + "(" + std::to_string(time(NULL) - cntxt.m_last_send) + ")"
<< std::setw(25) << get_protocol_state_string(cntxt.m_state)
<< std::setw(20) << std::to_string(time(NULL) - cntxt.m_started)
<< std::setw(12) << std::fixed << (connection_time == 0 ? 0.0 : cntxt.m_recv_cnt / connection_time / 1024)
<< std::setw(14) << std::fixed << cntxt.m_current_speed_down / 1024
<< std::setw(10) << std::fixed << (connection_time == 0 ? 0.0 : cntxt.m_send_cnt / connection_time / 1024)
<< std::setw(13) << std::fixed << cntxt.m_current_speed_up / 1024
<< (local_ip ? "[LAN]" : "")
<< std::left << (cntxt.m_remote_address.is_loopback() ? "[LOCALHOST]" : "") // 127.0.0.1
<< ENDL;
if (connection_time > 1)
{
down_sum += (cntxt.m_recv_cnt / connection_time / 1024);
up_sum += (cntxt.m_send_cnt / connection_time / 1024);
}
down_curr_sum += (cntxt.m_current_speed_down / 1024);
up_curr_sum += (cntxt.m_current_speed_up / 1024);
return true;
});
ss << ENDL
<< std::setw(125) << " "
<< std::setw(12) << down_sum
<< std::setw(14) << down_curr_sum
<< std::setw(10) << up_sum
<< std::setw(13) << up_curr_sum
<< ENDL;
LOG_PRINT_L0("Connections: " << ENDL << ss.str());
}
//------------------------------------------------------------------------------------------------------------------------
// Returns a list of connection_info objects describing each open p2p connection
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
std::list<connection_info> t_cryptonote_protocol_handler<t_core>::get_connections()
{
std::list<connection_info> connections;
m_p2p->for_each_connection([&](const connection_context& cntxt, nodetool::peerid_type peer_id, uint32_t support_flags)
{
connection_info cnx;
auto timestamp = time(NULL);
cnx.incoming = cntxt.m_is_income ? true : false;
cnx.address = cntxt.m_remote_address.str();
cnx.host = cntxt.m_remote_address.host_str();
cnx.ip = "";
cnx.port = "";
if (cntxt.m_remote_address.get_type_id() == epee::net_utils::ipv4_network_address::get_type_id())
{
cnx.ip = cnx.host;
cnx.port = std::to_string(cntxt.m_remote_address.as<epee::net_utils::ipv4_network_address>().port());
}
else if (cntxt.m_remote_address.get_type_id() == epee::net_utils::ipv6_network_address::get_type_id())
{
cnx.ip = cnx.host;
cnx.port = std::to_string(cntxt.m_remote_address.as<epee::net_utils::ipv6_network_address>().port());
}
cnx.rpc_port = cntxt.m_rpc_port;
cnx.rpc_credits_per_hash = cntxt.m_rpc_credits_per_hash;
cnx.peer_id = nodetool::peerid_to_string(peer_id);
cnx.support_flags = support_flags;
cnx.recv_count = cntxt.m_recv_cnt;
cnx.recv_idle_time = timestamp - std::max(cntxt.m_started, cntxt.m_last_recv);
cnx.send_count = cntxt.m_send_cnt;
cnx.send_idle_time = timestamp - std::max(cntxt.m_started, cntxt.m_last_send);
cnx.state = get_protocol_state_string(cntxt.m_state);
cnx.live_time = timestamp - cntxt.m_started;
cnx.localhost = cntxt.m_remote_address.is_loopback();
cnx.local_ip = cntxt.m_remote_address.is_local();
auto connection_time = time(NULL) - cntxt.m_started;
if (connection_time == 0)
{
cnx.avg_download = 0;
cnx.avg_upload = 0;
}
else
{
cnx.avg_download = cntxt.m_recv_cnt / connection_time / 1024;
cnx.avg_upload = cntxt.m_send_cnt / connection_time / 1024;
}
cnx.current_download = cntxt.m_current_speed_down / 1024;
cnx.current_upload = cntxt.m_current_speed_up / 1024;
cnx.connection_id = epee::string_tools::pod_to_hex(cntxt.m_connection_id);
cnx.ssl = cntxt.m_ssl;
cnx.height = cntxt.m_remote_blockchain_height;
cnx.pruning_seed = cntxt.m_pruning_seed;
cnx.address_type = (uint8_t)cntxt.m_remote_address.get_type_id();
connections.push_back(cnx);
return true;
});
return connections;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::process_payload_sync_data(const CORE_SYNC_DATA& hshd, cryptonote_connection_context& context, bool is_inital)
{
if(context.m_state == cryptonote_connection_context::state_before_handshake && !is_inital)
return true;
if(context.m_state == cryptonote_connection_context::state_synchronizing)
return true;
// from v6, if the peer advertises a top block version, reject if it's not what it should be (will only work if no voting)
if (hshd.current_height > 0)
{
const uint8_t version = m_core.get_ideal_hard_fork_version(hshd.current_height - 1);
if (version >= 6 && version != hshd.top_version)
{
if (version < hshd.top_version && version == m_core.get_ideal_hard_fork_version())
MDEBUG(context << " peer claims higher version than we think (" <<
(unsigned)hshd.top_version << " for " << (hshd.current_height - 1) << " instead of " << (unsigned)version <<
") - we may be forked from the network and a software upgrade may be needed, or that peer is broken or malicious");
return false;
}
}
// reject weird pruning schemes
if (hshd.pruning_seed)
{
const uint32_t log_stripes = tools::get_pruning_log_stripes(hshd.pruning_seed);
if (log_stripes != CRYPTONOTE_PRUNING_LOG_STRIPES || tools::get_pruning_stripe(hshd.pruning_seed) > (1u << log_stripes))
{
MWARNING(context << " peer claim unexpected pruning seed " << epee::string_tools::to_string_hex(hshd.pruning_seed) << ", disconnecting");
return false;
}
}
if (hshd.current_height < context.m_remote_blockchain_height)
{
MINFO(context << "Claims " << hshd.current_height << ", claimed " << context.m_remote_blockchain_height << " before");
hit_score(context, 1);
}
context.m_remote_blockchain_height = hshd.current_height;
context.m_pruning_seed = hshd.pruning_seed;
uint64_t target = m_core.get_target_blockchain_height();
if (target == 0)
target = m_core.get_current_blockchain_height();
if(m_core.have_block(hshd.top_id))
{
context.m_state = cryptonote_connection_context::state_normal;
if(is_inital && hshd.current_height >= target && target == m_core.get_current_blockchain_height())
on_connection_synchronized();
return true;
}
// No chain synchronization over hidden networks (tor, i2p, etc.)
if(context.m_remote_address.get_zone() != epee::net_utils::zone::public_)
{
context.m_state = cryptonote_connection_context::state_normal;
return true;
}
if (hshd.current_height > target)
{
/* As I don't know if accessing hshd from core could be a good practice,
I prefer pushing target height to the core at the same time it is pushed to the user.
Nz. */
int64_t diff = static_cast<int64_t>(hshd.current_height) - static_cast<int64_t>(m_core.get_current_blockchain_height());
uint64_t abs_diff = std::abs(diff);
uint64_t max_block_height = std::max(hshd.current_height,m_core.get_current_blockchain_height());
uint64_t last_block_v1 = m_core.get_nettype() == TESTNET ? 624633 : m_core.get_nettype() == MAINNET ? 1009826 : (uint64_t)-1;
uint64_t diff_v2 = max_block_height > last_block_v1 ? std::min(abs_diff, max_block_height - last_block_v1) : 0;
MCLOG(is_inital ? el::Level::Info : el::Level::Debug, "global", el::Color::Yellow, context << "Sync data returned a new top block candidate: " << m_core.get_current_blockchain_height() << " -> " << hshd.current_height
<< " [Your node is " << abs_diff << " blocks (" << tools::get_human_readable_timespan((abs_diff - diff_v2) * DIFFICULTY_TARGET_V1 + diff_v2 * DIFFICULTY_TARGET_V2) << ") "
<< (0 <= diff ? std::string("behind") : std::string("ahead"))
<< "] " << ENDL << "SYNCHRONIZATION started");
if (hshd.current_height >= m_core.get_current_blockchain_height() + 5) // don't switch to unsafe mode just for a few blocks
{
m_core.safesyncmode(false);
}
if (m_core.get_target_blockchain_height() == 0) // only when sync starts
{
m_sync_timer.resume();
m_sync_timer.reset();
m_add_timer.pause();
m_add_timer.reset();
m_last_add_end_time = 0;
m_sync_spans_downloaded = 0;
m_sync_old_spans_downloaded = 0;
m_sync_bad_spans_downloaded = 0;
m_sync_download_chain_size = 0;
m_sync_download_objects_size = 0;
}
m_core.set_target_blockchain_height((hshd.current_height));
}
MINFO(context << "Remote blockchain height: " << hshd.current_height << ", id: " << hshd.top_id);
if (m_no_sync)
{
context.m_state = cryptonote_connection_context::state_normal;
return true;
}
context.m_state = cryptonote_connection_context::state_synchronizing;
//let the socket to send response to handshake, but request callback, to let send request data after response
LOG_PRINT_CCONTEXT_L2("requesting callback");
++context.m_callback_request_count;
m_p2p->request_callback(context);
MLOG_PEER_STATE("requesting callback");
context.m_num_requested = 0;
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::get_payload_sync_data(CORE_SYNC_DATA& hshd)
{
m_core.get_blockchain_top(hshd.current_height, hshd.top_id);
hshd.top_version = m_core.get_ideal_hard_fork_version(hshd.current_height);
difficulty_type wide_cumulative_difficulty = m_core.get_block_cumulative_difficulty(hshd.current_height);
hshd.cumulative_difficulty = (wide_cumulative_difficulty & 0xffffffffffffffff).convert_to<uint64_t>();
hshd.cumulative_difficulty_top64 = ((wide_cumulative_difficulty >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
hshd.current_height +=1;
hshd.pruning_seed = m_core.get_blockchain_pruning_seed();
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::get_payload_sync_data(epee::byte_slice& data)
{
CORE_SYNC_DATA hsd = {};
get_payload_sync_data(hsd);
epee::serialization::store_t_to_binary(hsd, data);
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_notify_new_block(int command, NOTIFY_NEW_BLOCK::request& arg, cryptonote_connection_context& context)
{
MLOGIF_P2P_MESSAGE(crypto::hash hash; cryptonote::block b; bool ret = cryptonote::parse_and_validate_block_from_blob(arg.b.block, b, &hash);, ret, context << "Received NOTIFY_NEW_BLOCK " << hash << " (height " << arg.current_blockchain_height << ", " << arg.b.txs.size() << " txes)");
if(context.m_state != cryptonote_connection_context::state_normal)
return 1;
if(!is_synchronized()) // can happen if a peer connection goes to normal but another thread still hasn't finished adding queued blocks
{
LOG_DEBUG_CC(context, "Received new block while syncing, ignored");
return 1;
}
m_core.pause_mine();
std::vector<block_complete_entry> blocks;
blocks.push_back(arg.b);
std::vector<block> pblocks;
if (!m_core.prepare_handle_incoming_blocks(blocks, pblocks))
{
LOG_PRINT_CCONTEXT_L1("Block verification failed: prepare_handle_incoming_blocks failed, dropping connection");
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
for(auto tx_blob_it = arg.b.txs.begin(); tx_blob_it!=arg.b.txs.end();tx_blob_it++)
{
cryptonote::tx_verification_context tvc = AUTO_VAL_INIT(tvc);
m_core.handle_incoming_tx(*tx_blob_it, tvc, relay_method::block, true);
if(tvc.m_verifivation_failed)
{
LOG_PRINT_CCONTEXT_L1("Block verification failed: transaction verification failed, dropping connection");
drop_connection(context, false, false);
m_core.cleanup_handle_incoming_blocks();
m_core.resume_mine();
return 1;
}
}
block_verification_context bvc = {};
m_core.handle_incoming_block(arg.b.block, pblocks.empty() ? NULL : &pblocks[0], bvc); // got block from handle_notify_new_block
if (!m_core.cleanup_handle_incoming_blocks(true))
{
LOG_PRINT_CCONTEXT_L0("Failure in cleanup_handle_incoming_blocks");
m_core.resume_mine();
return 1;
}
m_core.resume_mine();
if(bvc.m_verifivation_failed)
{
LOG_PRINT_CCONTEXT_L0("Block verification failed, dropping connection");
drop_connection_with_score(context, bvc.m_bad_pow ? P2P_IP_FAILS_BEFORE_BLOCK : 1, false);
return 1;
}
if(bvc.m_added_to_main_chain)
{
//TODO: Add here announce protocol usage
relay_block(arg, context);
}else if(bvc.m_marked_as_orphaned)
{
context.m_needed_objects.clear();
context.m_state = cryptonote_connection_context::state_synchronizing;
NOTIFY_REQUEST_CHAIN::request r = {};
context.m_expect_height = m_core.get_current_blockchain_height();
m_core.get_short_chain_history(r.block_ids);
r.prune = m_sync_pruned_blocks;
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
context.m_expect_response = NOTIFY_RESPONSE_CHAIN_ENTRY::ID;
MLOG_P2P_MESSAGE("-->>NOTIFY_REQUEST_CHAIN: m_block_ids.size()=" << r.block_ids.size() );
post_notify<NOTIFY_REQUEST_CHAIN>(r, context);
MLOG_PEER_STATE("requesting chain");
}
// load json & DNS checkpoints every 10min/hour respectively,
// and verify them with respect to what blocks we already have
CHECK_AND_ASSERT_MES(m_core.update_checkpoints(), 1, "One or more checkpoints loaded from json or dns conflicted with existing checkpoints.");
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_notify_new_fluffy_block(int command, NOTIFY_NEW_FLUFFY_BLOCK::request& arg, cryptonote_connection_context& context)
{
MLOGIF_P2P_MESSAGE(crypto::hash hash; cryptonote::block b; bool ret = cryptonote::parse_and_validate_block_from_blob(arg.b.block, b, &hash);, ret, context << "Received NOTIFY_NEW_FLUFFY_BLOCK " << hash << " (height " << arg.current_blockchain_height << ", " << arg.b.txs.size() << " txes)");
if(context.m_state != cryptonote_connection_context::state_normal)
return 1;
if(!is_synchronized()) // can happen if a peer connection goes to normal but another thread still hasn't finished adding queued blocks
{
LOG_DEBUG_CC(context, "Received new block while syncing, ignored");
return 1;
}
m_core.pause_mine();
block new_block;
transaction miner_tx;
if(parse_and_validate_block_from_blob(arg.b.block, new_block))
{
// This is a second notification, we must have asked for some missing tx
if(!context.m_requested_objects.empty())
{
// What we asked for != to what we received ..
if(context.m_requested_objects.size() != arg.b.txs.size())
{
LOG_ERROR_CCONTEXT
(
"NOTIFY_NEW_FLUFFY_BLOCK -> request/response mismatch, "
<< "block = " << epee::string_tools::pod_to_hex(get_blob_hash(arg.b.block))
<< ", requested = " << context.m_requested_objects.size()
<< ", received = " << new_block.tx_hashes.size()
<< ", dropping connection"
);
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
}
std::vector<tx_blob_entry> have_tx;
have_tx.reserve(new_block.tx_hashes.size());
// Instead of requesting missing transactions by hash like BTC,
// we do it by index (thanks to a suggestion from moneromooo) because
// we're way cooler .. and also because they're smaller than hashes.
//
// Also, remember to pepper some whitespace changes around to bother
// moneromooo ... only because I <3 him.
std::vector<uint64_t> need_tx_indices;
need_tx_indices.reserve(new_block.tx_hashes.size());
transaction tx;
crypto::hash tx_hash;
for(auto& tx_blob: arg.b.txs)
{
if(parse_and_validate_tx_from_blob(tx_blob.blob, tx))
{
try
{
if(!get_transaction_hash(tx, tx_hash))
{
LOG_PRINT_CCONTEXT_L1
(
"NOTIFY_NEW_FLUFFY_BLOCK: get_transaction_hash failed"
<< ", dropping connection"
);
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
}
catch(...)
{
LOG_PRINT_CCONTEXT_L1
(
"NOTIFY_NEW_FLUFFY_BLOCK: get_transaction_hash failed"
<< ", exception thrown"
<< ", dropping connection"
);
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
// hijacking m_requested objects in connection context to patch up
// a possible DOS vector pointed out by @monero-moo where peers keep
// sending (0...n-1) transactions.
// If requested objects is not empty, then we must have asked for
// some missing transacionts, make sure that they're all there.
//
// Can I safely re-use this field? I think so, but someone check me!
if(!context.m_requested_objects.empty())
{
auto req_tx_it = context.m_requested_objects.find(tx_hash);
if(req_tx_it == context.m_requested_objects.end())
{
LOG_ERROR_CCONTEXT
(
"Peer sent wrong transaction (NOTIFY_NEW_FLUFFY_BLOCK): "
<< "transaction with id = " << tx_hash << " wasn't requested, "
<< "dropping connection"
);
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
context.m_requested_objects.erase(req_tx_it);
}
// we might already have the tx that the peer
// sent in our pool, so don't verify again..
if(!m_core.pool_has_tx(tx_hash))
{
MDEBUG("Incoming tx " << tx_hash << " not in pool, adding");
cryptonote::tx_verification_context tvc = AUTO_VAL_INIT(tvc);
if(!m_core.handle_incoming_tx(tx_blob, tvc, relay_method::block, true) || tvc.m_verifivation_failed)
{
LOG_PRINT_CCONTEXT_L1("Block verification failed: transaction verification failed, dropping connection");
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
//
// future todo:
// tx should only not be added to pool if verification failed, but
// maybe in the future could not be added for other reasons
// according to monero-moo so keep track of these separately ..
//
}
}
else
{
LOG_ERROR_CCONTEXT
(
"sent wrong tx: failed to parse and validate transaction: "
<< epee::string_tools::buff_to_hex_nodelimer(tx_blob.blob)
<< ", dropping connection"
);
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
}
// The initial size equality check could have been fooled if the sender
// gave us the number of transactions we asked for, but not the right
// ones. This check make sure the transactions we asked for were the
// ones we received.
if(context.m_requested_objects.size())
{
MERROR
(
"NOTIFY_NEW_FLUFFY_BLOCK: peer sent the number of transaction requested"
<< ", but not the actual transactions requested"
<< ", context.m_requested_objects.size() = " << context.m_requested_objects.size()
<< ", dropping connection"
);
drop_connection(context, false, false);
m_core.resume_mine();
return 1;
}
size_t tx_idx = 0;
for(auto& tx_hash: new_block.tx_hashes)
{
cryptonote::blobdata txblob;
if(m_core.get_pool_transaction(tx_hash, txblob, relay_category::broadcasted))
{
have_tx.push_back({txblob, crypto::null_hash});
}
else
{
std::vector<crypto::hash> tx_ids;
std::vector<transaction> txes;
std::vector<crypto::hash> missing;
tx_ids.push_back(tx_hash);
if (m_core.get_transactions(tx_ids, txes, missing) && missing.empty())
{
if (txes.size() == 1)
{
have_tx.push_back({tx_to_blob(txes.front()), crypto::null_hash});
}
else
{
MERROR("1 tx requested, none not found, but " << txes.size() << " returned");
m_core.resume_mine();
return 1;
}
}
else
{
MDEBUG("Tx " << tx_hash << " not found in pool");
need_tx_indices.push_back(tx_idx);
}
}
++tx_idx;
}
if(!need_tx_indices.empty()) // drats, we don't have everything..
{
// request non-mempool txs
MDEBUG("We are missing " << need_tx_indices.size() << " txes for this fluffy block");
for (auto txidx: need_tx_indices)
MDEBUG(" tx " << new_block.tx_hashes[txidx]);
NOTIFY_REQUEST_FLUFFY_MISSING_TX::request missing_tx_req;
missing_tx_req.block_hash = get_block_hash(new_block);
missing_tx_req.current_blockchain_height = arg.current_blockchain_height;
missing_tx_req.missing_tx_indices = std::move(need_tx_indices);
m_core.resume_mine();
MLOG_P2P_MESSAGE("-->>NOTIFY_REQUEST_FLUFFY_MISSING_TX: missing_tx_indices.size()=" << missing_tx_req.missing_tx_indices.size() );
post_notify<NOTIFY_REQUEST_FLUFFY_MISSING_TX>(missing_tx_req, context);
}
else // whoo-hoo we've got em all ..
{
MDEBUG("We have all needed txes for this fluffy block");
block_complete_entry b;
b.block = arg.b.block;
b.txs = have_tx;
std::vector<block_complete_entry> blocks;
blocks.push_back(b);
std::vector<block> pblocks;
if (!m_core.prepare_handle_incoming_blocks(blocks, pblocks))
{
LOG_PRINT_CCONTEXT_L0("Failure in prepare_handle_incoming_blocks");
m_core.resume_mine();
return 1;
}
block_verification_context bvc = {};
m_core.handle_incoming_block(arg.b.block, pblocks.empty() ? NULL : &pblocks[0], bvc); // got block from handle_notify_new_block
if (!m_core.cleanup_handle_incoming_blocks(true))
{
LOG_PRINT_CCONTEXT_L0("Failure in cleanup_handle_incoming_blocks");
m_core.resume_mine();
return 1;
}
m_core.resume_mine();
if( bvc.m_verifivation_failed )
{
LOG_PRINT_CCONTEXT_L0("Block verification failed, dropping connection");
drop_connection_with_score(context, bvc.m_bad_pow ? P2P_IP_FAILS_BEFORE_BLOCK : 1, false);
return 1;
}
if( bvc.m_added_to_main_chain )
{
//TODO: Add here announce protocol usage
NOTIFY_NEW_BLOCK::request reg_arg = AUTO_VAL_INIT(reg_arg);
reg_arg.current_blockchain_height = arg.current_blockchain_height;
reg_arg.b = b;
relay_block(reg_arg, context);
}
else if( bvc.m_marked_as_orphaned )
{
context.m_needed_objects.clear();
context.m_state = cryptonote_connection_context::state_synchronizing;
NOTIFY_REQUEST_CHAIN::request r = {};
context.m_expect_height = m_core.get_current_blockchain_height();
m_core.get_short_chain_history(r.block_ids);
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
r.prune = m_sync_pruned_blocks;
context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
context.m_expect_response = NOTIFY_RESPONSE_CHAIN_ENTRY::ID;
MLOG_P2P_MESSAGE("-->>NOTIFY_REQUEST_CHAIN: m_block_ids.size()=" << r.block_ids.size() );
post_notify<NOTIFY_REQUEST_CHAIN>(r, context);
MLOG_PEER_STATE("requesting chain");
}
// load json & DNS checkpoints every 10min/hour respectively,
// and verify them with respect to what blocks we already have
CHECK_AND_ASSERT_MES(m_core.update_checkpoints(), 1, "One or more checkpoints loaded from json or dns conflicted with existing checkpoints.");
}
}
else
{
LOG_ERROR_CCONTEXT
(
"sent wrong block: failed to parse and validate block: "
<< epee::string_tools::buff_to_hex_nodelimer(arg.b.block)
<< ", dropping connection"
);
m_core.resume_mine();
drop_connection(context, false, false);
return 1;
}
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_request_fluffy_missing_tx(int command, NOTIFY_REQUEST_FLUFFY_MISSING_TX::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_FLUFFY_MISSING_TX (" << arg.missing_tx_indices.size() << " txes), block hash " << arg.block_hash);
if (context.m_state == cryptonote_connection_context::state_before_handshake)
{
LOG_ERROR_CCONTEXT("Requested fluffy tx before handshake, dropping connection");
drop_connection(context, false, false);
return 1;
}
std::vector<std::pair<cryptonote::blobdata, block>> local_blocks;
std::vector<cryptonote::blobdata> local_txs;
block b;
if (!m_core.get_block_by_hash(arg.block_hash, b))
{
LOG_ERROR_CCONTEXT("failed to find block: " << arg.block_hash << ", dropping connection");
drop_connection(context, false, false);
return 1;
}
std::vector<crypto::hash> txids;
txids.reserve(b.tx_hashes.size());
NOTIFY_NEW_FLUFFY_BLOCK::request fluffy_response;
fluffy_response.b.block = t_serializable_object_to_blob(b);
fluffy_response.current_blockchain_height = arg.current_blockchain_height;
std::vector<bool> seen(b.tx_hashes.size(), false);
for(auto& tx_idx: arg.missing_tx_indices)
{
if(tx_idx < b.tx_hashes.size())
{
MDEBUG(" tx " << b.tx_hashes[tx_idx]);
if (seen[tx_idx])
{
LOG_ERROR_CCONTEXT
(
"Failed to handle request NOTIFY_REQUEST_FLUFFY_MISSING_TX"
<< ", request is asking for duplicate tx "
<< ", tx index = " << tx_idx << ", block tx count " << b.tx_hashes.size()
<< ", block_height = " << arg.current_blockchain_height
<< ", dropping connection"
);
drop_connection(context, true, false);
return 1;
}
txids.push_back(b.tx_hashes[tx_idx]);
seen[tx_idx] = true;
}
else
{
LOG_ERROR_CCONTEXT
(
"Failed to handle request NOTIFY_REQUEST_FLUFFY_MISSING_TX"
<< ", request is asking for a tx whose index is out of bounds "
<< ", tx index = " << tx_idx << ", block tx count " << b.tx_hashes.size()
<< ", block_height = " << arg.current_blockchain_height
<< ", dropping connection"
);
drop_connection(context, false, false);
return 1;
}
}
std::vector<cryptonote::transaction> txs;
std::vector<crypto::hash> missed;
if (!m_core.get_transactions(txids, txs, missed))
{
LOG_ERROR_CCONTEXT("Failed to handle request NOTIFY_REQUEST_FLUFFY_MISSING_TX, "
<< "failed to get requested transactions");
drop_connection(context, false, false);
return 1;
}
if (!missed.empty() || txs.size() != txids.size())
{
LOG_ERROR_CCONTEXT("Failed to handle request NOTIFY_REQUEST_FLUFFY_MISSING_TX, "
<< missed.size() << " requested transactions not found" << ", dropping connection");
drop_connection(context, false, false);
return 1;
}
for(auto& tx: txs)
{
fluffy_response.b.txs.push_back({t_serializable_object_to_blob(tx), crypto::null_hash});
}
MLOG_P2P_MESSAGE
(
"-->>NOTIFY_RESPONSE_FLUFFY_MISSING_TX: "
<< ", txs.size()=" << fluffy_response.b.txs.size()
<< ", rsp.current_blockchain_height=" << fluffy_response.current_blockchain_height
);
post_notify<NOTIFY_NEW_FLUFFY_BLOCK>(fluffy_response, context);
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_notify_get_txpool_complement(int command, NOTIFY_GET_TXPOOL_COMPLEMENT::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_GET_TXPOOL_COMPLEMENT (" << arg.hashes.size() << " txes)");
if(context.m_state != cryptonote_connection_context::state_normal)
return 1;
std::vector<std::pair<cryptonote::blobdata, block>> local_blocks;
std::vector<cryptonote::blobdata> local_txs;
std::vector<cryptonote::blobdata> txes;
if (!m_core.get_txpool_complement(arg.hashes, txes))
{
LOG_ERROR_CCONTEXT("failed to get txpool complement");
return 1;
}
NOTIFY_NEW_TRANSACTIONS::request new_txes;
new_txes.txs = std::move(txes);
MLOG_P2P_MESSAGE
(
"-->>NOTIFY_NEW_TRANSACTIONS: "
<< ", txs.size()=" << new_txes.txs.size()
);
post_notify<NOTIFY_NEW_TRANSACTIONS>(new_txes, context);
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_notify_new_transactions(int command, NOTIFY_NEW_TRANSACTIONS::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_NEW_TRANSACTIONS (" << arg.txs.size() << " txes)");
std::unordered_set<blobdata> seen;
for (const auto &blob: arg.txs)
{
MLOGIF_P2P_MESSAGE(cryptonote::transaction tx; crypto::hash hash; bool ret = cryptonote::parse_and_validate_tx_from_blob(blob, tx, hash);, ret, "Including transaction " << hash);
if (seen.find(blob) != seen.end())
{
LOG_PRINT_CCONTEXT_L1("Duplicate transaction in notification, dropping connection");
drop_connection(context, false, false);
return 1;
}
seen.insert(blob);
}
if(context.m_state != cryptonote_connection_context::state_normal)