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monero/src/cryptonote_protocol/cryptonote_protocol_handler.inl
moneromooo-monero 88c85c18e0
cryptonote: avoid double parsing blocks when syncing
2019-03-05 11:58:18 +00:00

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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) 2014-2018, 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 <boost/interprocess/detail/atomic.hpp>
#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"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net.cn"
#define MLOG_P2P_MESSAGE(x) MCINFO("net.p2p.msg", context << x)
#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 (600 * 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
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_stopping(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);
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;
if(context.m_state == cryptonote_connection_context::state_synchronizing)
{
NOTIFY_REQUEST_CHAIN::request r = boost::value_initialized<NOTIFY_REQUEST_CHAIN::request>();
context.m_needed_objects.clear();
m_core.get_short_chain_history(r.block_ids);
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
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>
bool t_cryptonote_protocol_handler<t_core>::get_stat_info(core_stat_info& stat_inf)
{
return m_core.get_stat_info(stat_inf);
}
//------------------------------------------------------------------------------------------------------------------------
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) << std::hex << 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());
}
std::stringstream peer_id_str;
peer_id_str << std::hex << std::setw(16) << peer_id;
peer_id_str >> cnx.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;
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())
MCLOG_RED(el::Level::Warning, "global", context << " peer claims higher version that 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");
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;
}
}
context.m_remote_blockchain_height = hshd.current_height;
context.m_pruning_seed = hshd.pruning_seed;
#ifdef CRYPTONOTE_PRUNING_DEBUG_SPOOF_SEED
context.m_pruning_seed = tools::make_pruning_seed(1 + (context.m_remote_address.as<epee::net_utils::ipv4_network_address>().ip()) % (1 << CRYPTONOTE_PRUNING_LOG_STRIPES), CRYPTONOTE_PRUNING_LOG_STRIPES);
LOG_INFO_CC(context, "New connection posing as pruning seed " << epee::string_tools::to_string_hex(context.m_pruning_seed) << ", seed address " << &context.m_pruning_seed);
#endif
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 && 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", context << "Sync data returned a new top block candidate: " << m_core.get_current_blockchain_height() << " -> " << hshd.current_height
<< " [Your node is " << abs_diff << " blocks (" << ((abs_diff - diff_v2) / (24 * 60 * 60 / DIFFICULTY_TARGET_V1)) + (diff_v2 / (24 * 60 * 60 / DIFFICULTY_TARGET_V2)) << " days) "
<< (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);
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");
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);
hshd.cumulative_difficulty = m_core.get_block_cumulative_difficulty(hshd.current_height);
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(blobdata& data)
{
CORE_SYNC_DATA hsd = boost::value_initialized<CORE_SYNC_DATA>();
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)
{
MLOG_P2P_MESSAGE("Received NOTIFY_NEW_BLOCK (" << 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, true, true, false);
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 = boost::value_initialized<block_verification_context>();
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(context, true, 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 = boost::value_initialized<NOTIFY_REQUEST_CHAIN::request>();
m_core.get_short_chain_history(r.block_ids);
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
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");
}
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)
{
MLOG_P2P_MESSAGE("Received NOTIFY_NEW_FLUFFY_BLOCK (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<blobdata> have_tx;
// 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;
transaction tx;
crypto::hash tx_hash;
for(auto& tx_blob: arg.b.txs)
{
if(parse_and_validate_tx_from_blob(tx_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, true, true, false) || 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)
<< ", 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))
{
have_tx.push_back(txblob);
}
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()));
}
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 = boost::value_initialized<block_verification_context>();
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(context, true, 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 = boost::value_initialized<NOTIFY_REQUEST_CHAIN::request>();
m_core.get_short_chain_history(r.block_ids);
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
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
{
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);
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;
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;
for(auto& tx_idx: arg.missing_tx_indices)
{
if(tx_idx < b.tx_hashes.size())
{
MDEBUG(" tx " << b.tx_hashes[tx_idx]);
txids.push_back(b.tx_hashes[tx_idx]);
}
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));
}
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_new_transactions(int command, NOTIFY_NEW_TRANSACTIONS::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_NEW_TRANSACTIONS (" << arg.txs.size() << " txes)");
if(context.m_state != cryptonote_connection_context::state_normal)
return 1;
// while syncing, core will lock for a long time, so we ignore
// those txes as they aren't really needed anyway, and avoid a
// long block before replying
if(!is_synchronized())
{
LOG_DEBUG_CC(context, "Received new tx while syncing, ignored");
return 1;
}
std::vector<cryptonote::blobdata> newtxs;
newtxs.reserve(arg.txs.size());
for (size_t i = 0; i < arg.txs.size(); ++i)
{
cryptonote::tx_verification_context tvc = AUTO_VAL_INIT(tvc);
m_core.handle_incoming_tx(arg.txs[i], tvc, false, true, false);
if(tvc.m_verifivation_failed)
{
LOG_PRINT_CCONTEXT_L1("Tx verification failed, dropping connection");
drop_connection(context, false, false);
return 1;
}
if(tvc.m_should_be_relayed)
newtxs.push_back(std::move(arg.txs[i]));
}
arg.txs = std::move(newtxs);
if(arg.txs.size())
{
//TODO: add announce usage here
relay_transactions(arg, context);
}
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_request_get_objects(int command, NOTIFY_REQUEST_GET_OBJECTS::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_GET_OBJECTS (" << arg.blocks.size() << " blocks, " << arg.txs.size() << " txes)");
NOTIFY_RESPONSE_GET_OBJECTS::request rsp;
if(!m_core.handle_get_objects(arg, rsp, context))
{
LOG_ERROR_CCONTEXT("failed to handle request NOTIFY_REQUEST_GET_OBJECTS, dropping connection");
drop_connection(context, false, false);
return 1;
}
MLOG_P2P_MESSAGE("-->>NOTIFY_RESPONSE_GET_OBJECTS: blocks.size()=" << rsp.blocks.size() << ", txs.size()=" << rsp.txs.size()
<< ", rsp.m_current_blockchain_height=" << rsp.current_blockchain_height << ", missed_ids.size()=" << rsp.missed_ids.size());
post_notify<NOTIFY_RESPONSE_GET_OBJECTS>(rsp, context);
//handler_response_blocks_now(sizeof(rsp)); // XXX
//handler_response_blocks_now(200);
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
double t_cryptonote_protocol_handler<t_core>::get_avg_block_size()
{
CRITICAL_REGION_LOCAL(m_buffer_mutex);
if (m_avg_buffer.empty()) {
MWARNING("m_avg_buffer.size() == 0");
return 500;
}
double avg = 0;
for (const auto &element : m_avg_buffer) avg += element;
return avg / m_avg_buffer.size();
}
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_response_get_objects(int command, NOTIFY_RESPONSE_GET_OBJECTS::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_RESPONSE_GET_OBJECTS (" << arg.blocks.size() << " blocks, " << arg.txs.size() << " txes)");
MLOG_PEER_STATE("received objects");
boost::posix_time::ptime request_time = context.m_last_request_time;
context.m_last_request_time = boost::date_time::not_a_date_time;
// calculate size of request
size_t size = 0;
for (const auto &element : arg.txs) size += element.size();
size_t blocks_size = 0;
for (const auto &element : arg.blocks) {
blocks_size += element.block.size();
for (const auto &tx : element.txs)
blocks_size += tx.size();
}
size += blocks_size;
for (const auto &element : arg.missed_ids)
size += sizeof(element.data);
size += sizeof(arg.current_blockchain_height);
{
CRITICAL_REGION_LOCAL(m_buffer_mutex);
m_avg_buffer.push_back(size);
}
++m_sync_spans_downloaded;
m_sync_download_objects_size += size;
MDEBUG(context << " downloaded " << size << " bytes worth of blocks");
/*using namespace boost::chrono;
auto point = steady_clock::now();
auto time_from_epoh = point.time_since_epoch();
auto sec = duration_cast< seconds >( time_from_epoh ).count();*/
//epee::net_utils::network_throttle_manager::get_global_throttle_inreq().logger_handle_net("log/dr-monero/net/req-all.data", sec, get_avg_block_size());
if(context.m_last_response_height > arg.current_blockchain_height)
{
LOG_ERROR_CCONTEXT("sent wrong NOTIFY_HAVE_OBJECTS: arg.m_current_blockchain_height=" << arg.current_blockchain_height
<< " < m_last_response_height=" << context.m_last_response_height << ", dropping connection");
drop_connection(context, false, false);
++m_sync_bad_spans_downloaded;
return 1;
}
context.m_remote_blockchain_height = arg.current_blockchain_height;
if (context.m_remote_blockchain_height > m_core.get_target_blockchain_height())
m_core.set_target_blockchain_height(context.m_remote_blockchain_height);
std::vector<crypto::hash> block_hashes;
block_hashes.reserve(arg.blocks.size());
const boost::posix_time::ptime now = boost::posix_time::microsec_clock::universal_time();
uint64_t start_height = std::numeric_limits<uint64_t>::max();
cryptonote::block b;
for(const block_complete_entry& block_entry: arg.blocks)
{
if (m_stopping)
{
return 1;
}
if(!parse_and_validate_block_from_blob(block_entry.block, b))
{
LOG_ERROR_CCONTEXT("sent wrong block: failed to parse and validate block: "
<< epee::string_tools::buff_to_hex_nodelimer(block_entry.block) << ", dropping connection");
drop_connection(context, false, false);
++m_sync_bad_spans_downloaded;
return 1;
}
if (b.miner_tx.vin.size() != 1 || b.miner_tx.vin.front().type() != typeid(txin_gen))
{
LOG_ERROR_CCONTEXT("sent wrong block: block: miner tx does not have exactly one txin_gen input"
<< epee::string_tools::buff_to_hex_nodelimer(block_entry.block) << ", dropping connection");
drop_connection(context, false, false);
++m_sync_bad_spans_downloaded;
return 1;
}
if (start_height == std::numeric_limits<uint64_t>::max())
start_height = boost::get<txin_gen>(b.miner_tx.vin[0]).height;
const crypto::hash block_hash = get_block_hash(b);
auto req_it = context.m_requested_objects.find(block_hash);
if(req_it == context.m_requested_objects.end())
{
LOG_ERROR_CCONTEXT("sent wrong NOTIFY_RESPONSE_GET_OBJECTS: block with id=" << epee::string_tools::pod_to_hex(get_blob_hash(block_entry.block))
<< " wasn't requested, dropping connection");
drop_connection(context, false, false);
++m_sync_bad_spans_downloaded;
return 1;
}
if(b.tx_hashes.size() != block_entry.txs.size())
{
LOG_ERROR_CCONTEXT("sent wrong NOTIFY_RESPONSE_GET_OBJECTS: block with id=" << epee::string_tools::pod_to_hex(get_blob_hash(block_entry.block))
<< ", tx_hashes.size()=" << b.tx_hashes.size() << " mismatch with block_complete_entry.m_txs.size()=" << block_entry.txs.size() << ", dropping connection");
drop_connection(context, false, false);
++m_sync_bad_spans_downloaded;
return 1;
}
context.m_requested_objects.erase(req_it);
block_hashes.push_back(block_hash);
}
if(!context.m_requested_objects.empty())
{
MERROR(context << "returned not all requested objects (context.m_requested_objects.size()="
<< context.m_requested_objects.size() << "), dropping connection");
drop_connection(context, false, false);
++m_sync_bad_spans_downloaded;
return 1;
}
{
MLOG_YELLOW(el::Level::Debug, context << " Got NEW BLOCKS inside of " << __FUNCTION__ << ": size: " << arg.blocks.size()
<< ", blocks: " << start_height << " - " << (start_height + arg.blocks.size() - 1) <<
" (pruning seed " << epee::string_tools::to_string_hex(context.m_pruning_seed) << ")");
// add that new span to the block queue
const boost::posix_time::time_duration dt = now - request_time;
const float rate = size * 1e6 / (dt.total_microseconds() + 1);
MDEBUG(context << " adding span: " << arg.blocks.size() << " at height " << start_height << ", " << dt.total_microseconds()/1e6 << " seconds, " << (rate/1024) << " kB/s, size now " << (m_block_queue.get_data_size() + blocks_size) / 1048576.f << " MB");
m_block_queue.add_blocks(start_height, arg.blocks, context.m_connection_id, rate, blocks_size);
const crypto::hash last_block_hash = cryptonote::get_block_hash(b);
context.m_last_known_hash = last_block_hash;
if (!m_core.get_test_drop_download() || !m_core.get_test_drop_download_height()) { // DISCARD BLOCKS for testing
return 1;
}
}
try_add_next_blocks(context);
return 1;
}
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::try_add_next_blocks(cryptonote_connection_context& context)
{
bool force_next_span = false;
{
// We try to lock the sync lock. If we can, it means no other thread is
// currently adding blocks, so we do that for as long as we can from the
// block queue. Then, we go back to download.
const boost::unique_lock<boost::mutex> sync{m_sync_lock, boost::try_to_lock};
if (!sync.owns_lock())
{
MINFO(context << "Failed to lock m_sync_lock, going back to download");
goto skip;
}
MDEBUG(context << " lock m_sync_lock, adding blocks to chain...");
MLOG_PEER_STATE("adding blocks");
{
m_core.pause_mine();
m_add_timer.resume();
bool starting = true;
epee::misc_utils::auto_scope_leave_caller scope_exit_handler = epee::misc_utils::create_scope_leave_handler([this, &starting]() {
m_add_timer.pause();
m_core.resume_mine();
if (!starting)
m_last_add_end_time = tools::get_tick_count();
});
while (1)
{
const uint64_t previous_height = m_core.get_current_blockchain_height();
uint64_t start_height;
std::vector<cryptonote::block_complete_entry> blocks;
boost::uuids::uuid span_connection_id;
if (!m_block_queue.get_next_span(start_height, blocks, span_connection_id))
{
MDEBUG(context << " no next span found, going back to download");
break;
}
if (blocks.empty())
{
MERROR(context << "Next span has no blocks");
m_block_queue.remove_spans(span_connection_id, start_height);
continue;
}
MDEBUG(context << " next span in the queue has blocks " << start_height << "-" << (start_height + blocks.size() - 1)
<< ", we need " << previous_height);
block new_block;
if (!parse_and_validate_block_from_blob(blocks.back().block, new_block))
{
MERROR(context << "Failed to parse block, but it should already have been parsed");
m_block_queue.remove_spans(span_connection_id, start_height);
continue;
}
const crypto::hash last_block_hash = cryptonote::get_block_hash(new_block);
if (m_core.have_block(last_block_hash))
{
const uint64_t subchain_height = start_height + blocks.size();
LOG_DEBUG_CC(context, "These are old blocks, ignoring: blocks " << start_height << " - " << (subchain_height-1) << ", blockchain height " << m_core.get_current_blockchain_height());
m_block_queue.remove_spans(span_connection_id, start_height);
++m_sync_old_spans_downloaded;
continue;
}
if (!parse_and_validate_block_from_blob(blocks.front().block, new_block))
{
MERROR(context << "Failed to parse block, but it should already have been parsed");
m_block_queue.remove_spans(span_connection_id, start_height);
continue;
}
bool parent_known = m_core.have_block(new_block.prev_id);
if (!parent_known)
{
// it could be:
// - later in the current chain
// - later in an alt chain
// - orphan
// if it was requested, then it'll be resolved later, otherwise it's an orphan
bool parent_requested = m_block_queue.requested(new_block.prev_id);
if (!parent_requested)
{
// we might be able to ask for that block directly, as we now can request out of order,
// otherwise we continue out of order, unless this block is the one we need, in which
// case we request block hashes, though it might be safer to disconnect ?
if (start_height > previous_height)
{
if (should_drop_connection(context, get_next_needed_pruning_stripe().first))
{
MDEBUG(context << "Got block with unknown parent which was not requested, but peer does not have that block - dropping connection");
if (!context.m_is_income)
m_p2p->add_used_stripe_peer(context);
drop_connection(context, false, true);
return 1;
}
MDEBUG(context << "Got block with unknown parent which was not requested, but peer does not have that block - back to download");
goto skip;
}
// this can happen if a connection was sicced onto a late span, if it did not have those blocks,
// since we don't know that at the sic time
LOG_ERROR_CCONTEXT("Got block with unknown parent which was not requested - querying block hashes");
m_block_queue.remove_spans(span_connection_id, start_height);
context.m_needed_objects.clear();
context.m_last_response_height = 0;
goto skip;
}
// parent was requested, so we wait for it to be retrieved
MINFO(context << " parent was requested, we'll get back to it");
break;
}
const boost::posix_time::ptime start = boost::posix_time::microsec_clock::universal_time();
if (starting)
{
starting = false;
if (m_last_add_end_time)
{
const uint64_t tnow = tools::get_tick_count();
const uint64_t ns = tools::ticks_to_ns(tnow - m_last_add_end_time);
MINFO("Restarting adding block after idle for " << ns/1e9 << " seconds");
}
}
std::vector<block> pblocks;
if (!m_core.prepare_handle_incoming_blocks(blocks, pblocks))
{
LOG_ERROR_CCONTEXT("Failure in prepare_handle_incoming_blocks");
return 1;
}
if (!pblocks.empty() && pblocks.size() != blocks.size())
{
m_core.cleanup_handle_incoming_blocks();
LOG_ERROR_CCONTEXT("Internal error: blocks.size() != block_entry.txs.size()");
return 1;
}
uint64_t block_process_time_full = 0, transactions_process_time_full = 0;
size_t num_txs = 0, blockidx = 0;
for(const block_complete_entry& block_entry: blocks)
{
if (m_stopping)
{
m_core.cleanup_handle_incoming_blocks();
return 1;
}
// process transactions
TIME_MEASURE_START(transactions_process_time);
num_txs += block_entry.txs.size();
std::vector<tx_verification_context> tvc;
m_core.handle_incoming_txs(block_entry.txs, tvc, true, true, false);
if (tvc.size() != block_entry.txs.size())
{
LOG_ERROR_CCONTEXT("Internal error: tvc.size() != block_entry.txs.size()");
return 1;
}
std::vector<blobdata>::const_iterator it = block_entry.txs.begin();
for (size_t i = 0; i < tvc.size(); ++i, ++it)
{
if(tvc[i].m_verifivation_failed)
{
if (!m_p2p->for_connection(span_connection_id, [&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t f)->bool{
cryptonote::transaction tx;
parse_and_validate_tx_from_blob(*it, tx); // must succeed if we got here
LOG_ERROR_CCONTEXT("transaction verification failed on NOTIFY_RESPONSE_GET_OBJECTS, tx_id = "
<< epee::string_tools::pod_to_hex(cryptonote::get_transaction_hash(tx)) << ", dropping connection");
drop_connection(context, false, true);
return 1;
}))
LOG_ERROR_CCONTEXT("span connection id not found");
if (!m_core.cleanup_handle_incoming_blocks())
{
LOG_PRINT_CCONTEXT_L0("Failure in cleanup_handle_incoming_blocks");
return 1;
}
// in case the peer had dropped beforehand, remove the span anyway so other threads can wake up and get it
m_block_queue.remove_spans(span_connection_id, start_height);
return 1;
}
}
TIME_MEASURE_FINISH(transactions_process_time);
transactions_process_time_full += transactions_process_time;
// process block
TIME_MEASURE_START(block_process_time);
block_verification_context bvc = boost::value_initialized<block_verification_context>();
m_core.handle_incoming_block(block_entry.block, pblocks.empty() ? NULL : &pblocks[blockidx], bvc, false); // <--- process block
if(bvc.m_verifivation_failed)
{
if (!m_p2p->for_connection(span_connection_id, [&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t f)->bool{
LOG_PRINT_CCONTEXT_L1("Block verification failed, dropping connection");
drop_connection(context, true, true);
return 1;
}))
LOG_ERROR_CCONTEXT("span connection id not found");
if (!m_core.cleanup_handle_incoming_blocks())
{
LOG_PRINT_CCONTEXT_L0("Failure in cleanup_handle_incoming_blocks");
return 1;
}
// in case the peer had dropped beforehand, remove the span anyway so other threads can wake up and get it
m_block_queue.remove_spans(span_connection_id, start_height);
return 1;
}
if(bvc.m_marked_as_orphaned)
{
if (!m_p2p->for_connection(span_connection_id, [&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t f)->bool{
LOG_PRINT_CCONTEXT_L1("Block received at sync phase was marked as orphaned, dropping connection");
drop_connection(context, true, true);
return 1;
}))
LOG_ERROR_CCONTEXT("span connection id not found");
if (!m_core.cleanup_handle_incoming_blocks())
{
LOG_PRINT_CCONTEXT_L0("Failure in cleanup_handle_incoming_blocks");
return 1;
}
// in case the peer had dropped beforehand, remove the span anyway so other threads can wake up and get it
m_block_queue.remove_spans(span_connection_id, start_height);
return 1;
}
TIME_MEASURE_FINISH(block_process_time);
block_process_time_full += block_process_time;
++blockidx;
} // each download block
MDEBUG(context << "Block process time (" << blocks.size() << " blocks, " << num_txs << " txs): " << block_process_time_full + transactions_process_time_full << " (" << transactions_process_time_full << "/" << block_process_time_full << ") ms");
if (!m_core.cleanup_handle_incoming_blocks())
{
LOG_PRINT_CCONTEXT_L0("Failure in cleanup_handle_incoming_blocks");
return 1;
}
m_block_queue.remove_spans(span_connection_id, start_height);
const uint64_t current_blockchain_height = m_core.get_current_blockchain_height();
if (current_blockchain_height > previous_height)
{
const uint64_t target_blockchain_height = m_core.get_target_blockchain_height();
const boost::posix_time::time_duration dt = boost::posix_time::microsec_clock::universal_time() - start;
std::string progress_message = "";
if (current_blockchain_height < target_blockchain_height)
{
uint64_t completion_percent = (current_blockchain_height * 100 / target_blockchain_height);
if (completion_percent == 100) // never show 100% if not actually up to date
completion_percent = 99;
progress_message = " (" + std::to_string(completion_percent) + "%, "
+ std::to_string(target_blockchain_height - current_blockchain_height) + " left)";
}
const uint32_t previous_stripe = tools::get_pruning_stripe(previous_height, target_blockchain_height, CRYPTONOTE_PRUNING_LOG_STRIPES);
const uint32_t current_stripe = tools::get_pruning_stripe(current_blockchain_height, target_blockchain_height, CRYPTONOTE_PRUNING_LOG_STRIPES);
std::string timing_message = "";
if (ELPP->vRegistry()->allowed(el::Level::Info, "sync-info"))
timing_message = std::string(" (") + std::to_string(dt.total_microseconds()/1e6) + " sec, "
+ std::to_string((current_blockchain_height - previous_height) * 1e6 / dt.total_microseconds())
+ " blocks/sec), " + std::to_string(m_block_queue.get_data_size() / 1048576.f) + " MB queued in "
+ std::to_string(m_block_queue.get_num_filled_spans()) + " spans, stripe "
+ std::to_string(previous_stripe) + " -> " + std::to_string(current_stripe);
if (ELPP->vRegistry()->allowed(el::Level::Debug, "sync-info"))
timing_message += std::string(": ") + m_block_queue.get_overview(current_blockchain_height);
MGINFO_YELLOW("Synced " << current_blockchain_height << "/" << target_blockchain_height
<< progress_message << timing_message);
if (previous_stripe != current_stripe)
notify_new_stripe(context, current_stripe);
}
}
}
MLOG_PEER_STATE("stopping adding blocks");
if (should_download_next_span(context, false))
{
force_next_span = true;
}
else if (should_drop_connection(context, get_next_needed_pruning_stripe().first))
{
if (!context.m_is_income)
{
m_p2p->add_used_stripe_peer(context);
drop_connection(context, false, false);
}
return 1;
}
}
skip:
if (!request_missing_objects(context, true, force_next_span))
{
LOG_ERROR_CCONTEXT("Failed to request missing objects, dropping connection");
drop_connection(context, false, false);
return 1;
}
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::notify_new_stripe(cryptonote_connection_context& cntxt, uint32_t stripe)
{
m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool
{
if (cntxt.m_connection_id == context.m_connection_id)
return true;
if (context.m_state == cryptonote_connection_context::state_normal)
{
const uint32_t peer_stripe = tools::get_pruning_stripe(context.m_pruning_seed);
if (stripe && peer_stripe && peer_stripe != stripe)
return true;
context.m_state = cryptonote_connection_context::state_synchronizing;
LOG_PRINT_CCONTEXT_L2("requesting callback");
++context.m_callback_request_count;
m_p2p->request_callback(context);
MLOG_PEER_STATE("requesting callback");
}
return true;
});
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::on_idle()
{
m_idle_peer_kicker.do_call(boost::bind(&t_cryptonote_protocol_handler<t_core>::kick_idle_peers, this));
m_standby_checker.do_call(boost::bind(&t_cryptonote_protocol_handler<t_core>::check_standby_peers, this));
return m_core.on_idle();
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::kick_idle_peers()
{
MTRACE("Checking for idle peers...");
m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool
{
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;
if (dt.total_microseconds() > IDLE_PEER_KICK_TIME)
{
MINFO(context << " kicking idle peer, last update " << (dt.total_microseconds() / 1.e6) << " seconds ago");
LOG_PRINT_CCONTEXT_L2("requesting callback");
context.m_last_request_time = boost::date_time::not_a_date_time;
context.m_state = cryptonote_connection_context::state_standby; // we'll go back to adding, then (if we can't), download
++context.m_callback_request_count;
m_p2p->request_callback(context);
}
}
return true;
});
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::check_standby_peers()
{
m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool
{
if (context.m_state == cryptonote_connection_context::state_standby)
{
LOG_PRINT_CCONTEXT_L2("requesting callback");
++context.m_callback_request_count;
m_p2p->request_callback(context);
}
return true;
});
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_request_chain(int command, NOTIFY_REQUEST_CHAIN::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_CHAIN (" << arg.block_ids.size() << " blocks");
NOTIFY_RESPONSE_CHAIN_ENTRY::request r;
if(!m_core.find_blockchain_supplement(arg.block_ids, r))
{
LOG_ERROR_CCONTEXT("Failed to handle NOTIFY_REQUEST_CHAIN.");
drop_connection(context, false, false);
return 1;
}
MLOG_P2P_MESSAGE("-->>NOTIFY_RESPONSE_CHAIN_ENTRY: m_start_height=" << r.start_height << ", m_total_height=" << r.total_height << ", m_block_ids.size()=" << r.m_block_ids.size());
post_notify<NOTIFY_RESPONSE_CHAIN_ENTRY>(r, context);
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::should_download_next_span(cryptonote_connection_context& context, bool standby)
{
std::vector<crypto::hash> hashes;
boost::uuids::uuid span_connection_id;
boost::posix_time::ptime request_time;
boost::uuids::uuid connection_id;
std::pair<uint64_t, uint64_t> span;
bool filled;
const uint64_t blockchain_height = m_core.get_current_blockchain_height();
if (context.m_remote_blockchain_height <= blockchain_height)
return false;
const boost::posix_time::ptime now = boost::posix_time::microsec_clock::universal_time();
const bool has_next_block = tools::has_unpruned_block(blockchain_height, context.m_remote_blockchain_height, context.m_pruning_seed);
if (has_next_block)
{
if (!m_block_queue.has_next_span(blockchain_height, filled, request_time, connection_id))
{
MDEBUG(context << " we should download it as no peer reserved it");
return true;
}
if (!filled)
{
const long dt = (now - request_time).total_microseconds();
if (dt >= REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD)
{
MDEBUG(context << " we should download it as it's not been received yet after " << dt/1e6);
return true;
}
// in standby, be ready to double download early since we're idling anyway
// let the fastest peer trigger first
long threshold;
const double dl_speed = context.m_max_speed_down;
if (standby && dt >= REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD_STANDBY && dl_speed > 0)
{
bool download = false;
if (m_p2p->for_connection(connection_id, [&](cryptonote_connection_context& ctx, nodetool::peerid_type peer_id, uint32_t f)->bool{
const time_t nowt = time(NULL);
const time_t time_since_last_recv = nowt - ctx.m_last_recv;
const float last_activity = std::min((float)time_since_last_recv, dt/1e6f);
const bool stalled = last_activity > LAST_ACTIVITY_STALL_THRESHOLD;
if (stalled)
{
MDEBUG(context << " we should download it as the downloading peer is stalling for " << nowt - ctx.m_last_recv << " seconds");
download = true;
return true;
}
// estimate the standby peer can give us 80% of its max speed
// and let it download if that speed is > N times as fast as the current one
// N starts at 10 after REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD_STANDBY,
// decreases to 1.25 at REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD,
// so that at times goes without the download being done, a retry becomes easier
const float max_multiplier = 10.f;
const float min_multiplier = 1.25f;
float multiplier = max_multiplier;
if (dt/1e6 >= REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD_STANDBY)
{
multiplier = max_multiplier - (dt/1e6-REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD_STANDBY) * (max_multiplier - min_multiplier) / (REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD - REQUEST_NEXT_SCHEDULED_SPAN_THRESHOLD_STANDBY);
multiplier = std::min(max_multiplier, std::max(min_multiplier, multiplier));
}
if (dl_speed * .8f > ctx.m_current_speed_down * multiplier)
{
MDEBUG(context << " we should download it as we are substantially faster (" << dl_speed << " vs "
<< ctx.m_current_speed_down << ", multiplier " << multiplier << " after " << dt/1e6 << " seconds)");
download = true;
return true;
}
return true;
}))
{
if (download)
return true;
}
else
{
MWARNING(context << " we should download it as the downloading peer is unexpectedly not known to us");
return true;
}
}
}
}
return false;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::should_drop_connection(cryptonote_connection_context& context, uint32_t next_stripe)
{
if (context.m_anchor)
{
MDEBUG(context << "This is an anchor peer, not dropping");
return false;
}
if (context.m_pruning_seed == 0)
{
MDEBUG(context << "This peer is not striped, not dropping");
return false;
}
const uint32_t peer_stripe = tools::get_pruning_stripe(context.m_pruning_seed);
if (next_stripe == peer_stripe)
{
MDEBUG(context << "This peer has needed stripe " << peer_stripe << ", not dropping");
return false;
}
if (!context.m_needed_objects.empty())
{
const uint64_t next_available_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
if (tools::has_unpruned_block(next_available_block_height, context.m_remote_blockchain_height, context.m_pruning_seed))
{
MDEBUG(context << "This peer has unpruned next block at height " << next_available_block_height << ", not dropping");
return false;
}
}
if (next_stripe > 0)
{
unsigned int n_out_peers = 0, n_peers_on_next_stripe = 0;
m_p2p->for_each_connection([&](cryptonote_connection_context& ctx, nodetool::peerid_type peer_id, uint32_t support_flags)->bool{
if (!ctx.m_is_income)
++n_out_peers;
if (ctx.m_state >= cryptonote_connection_context::state_synchronizing && tools::get_pruning_stripe(ctx.m_pruning_seed) == next_stripe)
++n_peers_on_next_stripe;
return true;
});
const uint32_t distance = (peer_stripe + (1<<CRYPTONOTE_PRUNING_LOG_STRIPES) - next_stripe) % (1<<CRYPTONOTE_PRUNING_LOG_STRIPES);
if ((n_out_peers >= m_max_out_peers && n_peers_on_next_stripe == 0) || (distance > 1 && n_peers_on_next_stripe <= 2) || distance > 2)
{
MDEBUG(context << "we want seed " << next_stripe << ", and either " << n_out_peers << " is at max out peers ("
<< m_max_out_peers << ") or distance " << distance << " from " << next_stripe << " to " << peer_stripe <<
" is too large and we have only " << n_peers_on_next_stripe << " peers on next seed, dropping connection to make space");
return true;
}
}
MDEBUG(context << "End of checks, not dropping");
return false;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::skip_unneeded_hashes(cryptonote_connection_context& context, bool check_block_queue) const
{
// take out blocks we already have
size_t skip = 0;
while (skip < context.m_needed_objects.size() && (m_core.have_block(context.m_needed_objects[skip]) || (check_block_queue && m_block_queue.have(context.m_needed_objects[skip]))))
{
// if we're popping the last hash, record it so we can ask again from that hash,
// this prevents never being able to progress on peers we get old hash lists from
if (skip + 1 == context.m_needed_objects.size())
context.m_last_known_hash = context.m_needed_objects[skip];
++skip;
}
if (skip > 0)
{
MDEBUG(context << "skipping " << skip << "/" << context.m_needed_objects.size() << " blocks");
context.m_needed_objects = std::vector<crypto::hash>(context.m_needed_objects.begin() + skip, context.m_needed_objects.end());
}
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::request_missing_objects(cryptonote_connection_context& context, bool check_having_blocks, bool force_next_span)
{
// flush stale spans
std::set<boost::uuids::uuid> live_connections;
m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool{
live_connections.insert(context.m_connection_id);
return true;
});
m_block_queue.flush_stale_spans(live_connections);
// if we don't need to get next span, and the block queue is full enough, wait a bit
bool start_from_current_chain = false;
if (!force_next_span)
{
do
{
size_t nspans = m_block_queue.get_num_filled_spans();
size_t size = m_block_queue.get_data_size();
const uint64_t bc_height = m_core.get_current_blockchain_height();
const auto next_needed_pruning_stripe = get_next_needed_pruning_stripe();
const uint32_t add_stripe = tools::get_pruning_stripe(bc_height, context.m_remote_blockchain_height, CRYPTONOTE_PRUNING_LOG_STRIPES);
const uint32_t peer_stripe = tools::get_pruning_stripe(context.m_pruning_seed);
const size_t block_queue_size_threshold = m_block_download_max_size ? m_block_download_max_size : BLOCK_QUEUE_SIZE_THRESHOLD;
bool queue_proceed = nspans < BLOCK_QUEUE_NSPANS_THRESHOLD || size < block_queue_size_threshold;
// get rid of blocks we already requested, or already have
skip_unneeded_hashes(context, true);
uint64_t next_needed_height = m_block_queue.get_next_needed_height(bc_height);
uint64_t next_block_height;
if (context.m_needed_objects.empty())
next_block_height = next_needed_height;
else
next_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
bool stripe_proceed_main = (add_stripe == 0 || peer_stripe == 0 || add_stripe == peer_stripe) && (next_block_height < bc_height + BLOCK_QUEUE_FORCE_DOWNLOAD_NEAR_BLOCKS || next_needed_height < bc_height + BLOCK_QUEUE_FORCE_DOWNLOAD_NEAR_BLOCKS);
bool stripe_proceed_secondary = tools::has_unpruned_block(next_block_height, context.m_remote_blockchain_height, context.m_pruning_seed);
bool proceed = stripe_proceed_main || (queue_proceed && stripe_proceed_secondary);
if (!stripe_proceed_main && !stripe_proceed_secondary && should_drop_connection(context, tools::get_pruning_stripe(next_block_height, context.m_remote_blockchain_height, CRYPTONOTE_PRUNING_LOG_STRIPES)))
{
if (!context.m_is_income)
m_p2p->add_used_stripe_peer(context);
return false; // drop outgoing connections
}
MDEBUG(context << "proceed " << proceed << " (queue " << queue_proceed << ", stripe " << stripe_proceed_main << "/" <<
stripe_proceed_secondary << "), " << next_needed_pruning_stripe.first << "-" << next_needed_pruning_stripe.second <<
" needed, bc add stripe " << add_stripe << ", we have " << peer_stripe << "), bc_height " << bc_height);
MDEBUG(context << " - next_block_height " << next_block_height << ", seed " << epee::string_tools::to_string_hex(context.m_pruning_seed) <<
", next_needed_height "<< next_needed_height);
MDEBUG(context << " - last_response_height " << context.m_last_response_height << ", m_needed_objects size " << context.m_needed_objects.size());
// if we're waiting for next span, try to get it before unblocking threads below,
// or a runaway downloading of future spans might happen
if (stripe_proceed_main && should_download_next_span(context, true))
{
MDEBUG(context << " we should try for that next span too, we think we could get it faster, resuming");
force_next_span = true;
MLOG_PEER_STATE("resuming");
break;
}
if (proceed)
{
if (context.m_state != cryptonote_connection_context::state_standby)
{
LOG_DEBUG_CC(context, "Block queue is " << nspans << " and " << size << ", resuming");
MLOG_PEER_STATE("resuming");
}
break;
}
// this one triggers if all threads are in standby, which should not happen,
// but happened at least once, so we unblock at least one thread if so
boost::unique_lock<boost::mutex> sync{m_sync_lock, boost::try_to_lock};
if (sync.owns_lock())
{
bool filled = false;
boost::posix_time::ptime time;
boost::uuids::uuid connection_id;
if (m_block_queue.has_next_span(m_core.get_current_blockchain_height(), filled, time, connection_id) && filled)
{
LOG_DEBUG_CC(context, "No other thread is adding blocks, and next span needed is ready, resuming");
MLOG_PEER_STATE("resuming");
context.m_state = cryptonote_connection_context::state_standby;
++context.m_callback_request_count;
m_p2p->request_callback(context);
return true;
}
else
{
sync.unlock();
// if this has gone on for too long, drop incoming connection to guard against some wedge state
if (!context.m_is_income)
{
const uint64_t now = tools::get_tick_count();
const uint64_t dt = now - m_last_add_end_time;
if (tools::ticks_to_ns(dt) >= DROP_ON_SYNC_WEDGE_THRESHOLD)
{
MDEBUG(context << "Block addition seems to have wedged, dropping connection");
return false;
}
}
}
}
if (context.m_state != cryptonote_connection_context::state_standby)
{
if (!queue_proceed)
LOG_DEBUG_CC(context, "Block queue is " << nspans << " and " << size << ", pausing");
else if (!stripe_proceed_main && !stripe_proceed_secondary)
LOG_DEBUG_CC(context, "We do not have the stripe required to download another block, pausing");
context.m_state = cryptonote_connection_context::state_standby;
MLOG_PEER_STATE("pausing");
}
return true;
} while(0);
context.m_state = cryptonote_connection_context::state_synchronizing;
}
MDEBUG(context << " request_missing_objects: check " << check_having_blocks << ", force_next_span " << force_next_span
<< ", m_needed_objects " << context.m_needed_objects.size() << " lrh " << context.m_last_response_height << ", chain "
<< m_core.get_current_blockchain_height() << ", pruning seed " << epee::string_tools::to_string_hex(context.m_pruning_seed));
if(context.m_needed_objects.size() || force_next_span)
{
//we know objects that we need, request this objects
NOTIFY_REQUEST_GET_OBJECTS::request req;
bool is_next = false;
size_t count = 0;
const size_t count_limit = m_core.get_block_sync_size(m_core.get_current_blockchain_height());
std::pair<uint64_t, uint64_t> span = std::make_pair(0, 0);
if (force_next_span)
{
if (span.second == 0)
{
std::vector<crypto::hash> hashes;
boost::uuids::uuid span_connection_id;
boost::posix_time::ptime time;
span = m_block_queue.get_next_span_if_scheduled(hashes, span_connection_id, time);
if (span.second > 0)
{
is_next = true;
for (const auto &hash: hashes)
{
req.blocks.push_back(hash);
context.m_requested_objects.insert(hash);
}
m_block_queue.reset_next_span_time();
}
}
}
if (span.second == 0)
{
MDEBUG(context << " span size is 0");
if (context.m_last_response_height + 1 < context.m_needed_objects.size())
{
MERROR(context << " ERROR: inconsistent context: lrh " << context.m_last_response_height << ", nos " << context.m_needed_objects.size());
context.m_needed_objects.clear();
context.m_last_response_height = 0;
goto skip;
}
skip_unneeded_hashes(context, false);
const uint64_t first_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
span = m_block_queue.reserve_span(first_block_height, context.m_last_response_height, count_limit, context.m_connection_id, context.m_pruning_seed, context.m_remote_blockchain_height, context.m_needed_objects);
MDEBUG(context << " span from " << first_block_height << ": " << span.first << "/" << span.second);
if (span.second > 0)
{
const uint32_t stripe = tools::get_pruning_stripe(span.first, context.m_remote_blockchain_height, CRYPTONOTE_PRUNING_LOG_STRIPES);
if (context.m_pruning_seed && stripe != tools::get_pruning_stripe(context.m_pruning_seed))
{
MDEBUG(context << " starting early on next seed (" << span.first << " with stripe " << stripe <<
", context seed " << epee::string_tools::to_string_hex(context.m_pruning_seed) << ")");
}
}
}
if (span.second == 0 && !force_next_span)
{
MDEBUG(context << " still no span reserved, we may be in the corner case of next span scheduled and everything else scheduled/filled");
std::vector<crypto::hash> hashes;
boost::uuids::uuid span_connection_id;
boost::posix_time::ptime time;
span = m_block_queue.get_next_span_if_scheduled(hashes, span_connection_id, time);
if (span.second > 0 && !tools::has_unpruned_block(span.first, context.m_remote_blockchain_height, context.m_pruning_seed))
span = std::make_pair(0, 0);
if (span.second > 0)
{
is_next = true;
for (const auto &hash: hashes)
{
req.blocks.push_back(hash);
++count;
context.m_requested_objects.insert(hash);
// that's atrocious O(n) wise, but this is rare
auto i = std::find(context.m_needed_objects.begin(), context.m_needed_objects.end(), hash);
if (i != context.m_needed_objects.end())
context.m_needed_objects.erase(i);
}
}
}
MDEBUG(context << " span: " << span.first << "/" << span.second << " (" << span.first << " - " << (span.first + span.second - 1) << ")");
if (span.second > 0)
{
if (!is_next)
{
const uint64_t first_context_block_height = context.m_last_response_height - context.m_needed_objects.size() + 1;
uint64_t skip = span.first - first_context_block_height;
if (skip > context.m_needed_objects.size())
{
MERROR("ERROR: skip " << skip << ", m_needed_objects " << context.m_needed_objects.size() << ", first_context_block_height" << first_context_block_height);
return false;
}
if (skip > 0)
context.m_needed_objects = std::vector<crypto::hash>(context.m_needed_objects.begin() + skip, context.m_needed_objects.end());
if (context.m_needed_objects.size() < span.second)
{
MERROR("ERROR: span " << span.first << "/" << span.second << ", m_needed_objects " << context.m_needed_objects.size());
return false;
}
for (size_t n = 0; n < span.second; ++n)
{
req.blocks.push_back(context.m_needed_objects[n]);
++count;
context.m_requested_objects.insert(context.m_needed_objects[n]);
}
context.m_needed_objects = std::vector<crypto::hash>(context.m_needed_objects.begin() + span.second, context.m_needed_objects.end());
}
context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
MLOG_P2P_MESSAGE("-->>NOTIFY_REQUEST_GET_OBJECTS: blocks.size()=" << req.blocks.size() << ", txs.size()=" << req.txs.size()
<< "requested blocks count=" << count << " / " << count_limit << " from " << span.first << ", first hash " << req.blocks.front());
//epee::net_utils::network_throttle_manager::get_global_throttle_inreq().logger_handle_net("log/dr-monero/net/req-all.data", sec, get_avg_block_size());
post_notify<NOTIFY_REQUEST_GET_OBJECTS>(req, context);
MLOG_PEER_STATE("requesting objects");
return true;
}
// if we're still around, we might be at a point where the peer is pruned, so we could either
// drop it to make space for other peers, or ask for a span further down the line
const uint32_t next_stripe = get_next_needed_pruning_stripe().first;
const uint32_t peer_stripe = tools::get_pruning_stripe(context.m_pruning_seed);
if (next_stripe && peer_stripe && next_stripe != peer_stripe)
{
// at this point, we have to either close the connection, or start getting blocks past the
// current point, or become dormant
MDEBUG(context << "this peer is pruned at seed " << epee::string_tools::to_string_hex(context.m_pruning_seed) <<
", next stripe needed is " << next_stripe);
if (!context.m_is_income)
{
if (should_drop_connection(context, next_stripe))
{
m_p2p->add_used_stripe_peer(context);
return false; // drop outgoing connections
}
}
// we'll get back stuck waiting for the go ahead
context.m_state = cryptonote_connection_context::state_normal;
MLOG_PEER_STATE("Nothing to do for now, switching to normal state");
return true;
}
}
skip:
context.m_needed_objects.clear();
// we might have been called from the "received chain entry" handler, and end up
// here because we can't use any of those blocks (maybe because all of them are
// actually already requested). In this case, if we can add blocks instead, do so
if (m_core.get_current_blockchain_height() < m_core.get_target_blockchain_height())
{
const boost::unique_lock<boost::mutex> sync{m_sync_lock, boost::try_to_lock};
if (sync.owns_lock())
{
uint64_t start_height;
std::vector<cryptonote::block_complete_entry> blocks;
boost::uuids::uuid span_connection_id;
bool filled = false;
if (m_block_queue.get_next_span(start_height, blocks, span_connection_id, filled) && filled)
{
LOG_DEBUG_CC(context, "No other thread is adding blocks, resuming");
MLOG_PEER_STATE("will try to add blocks next");
context.m_state = cryptonote_connection_context::state_standby;
++context.m_callback_request_count;
m_p2p->request_callback(context);
return true;
}
}
}
if(context.m_last_response_height < context.m_remote_blockchain_height-1)
{//we have to fetch more objects ids, request blockchain entry
NOTIFY_REQUEST_CHAIN::request r = boost::value_initialized<NOTIFY_REQUEST_CHAIN::request>();
m_core.get_short_chain_history(r.block_ids);
CHECK_AND_ASSERT_MES(!r.block_ids.empty(), false, "Short chain history is empty");
if (!start_from_current_chain)
{
// we'll want to start off from where we are on that peer, which may not be added yet
if (context.m_last_known_hash != crypto::null_hash && r.block_ids.front() != context.m_last_known_hash)
r.block_ids.push_front(context.m_last_known_hash);
}
handler_request_blocks_history( r.block_ids ); // change the limit(?), sleep(?)
//std::string blob; // for calculate size of request
//epee::serialization::store_t_to_binary(r, blob);
//epee::net_utils::network_throttle_manager::get_global_throttle_inreq().logger_handle_net("log/dr-monero/net/req-all.data", sec, get_avg_block_size());
//LOG_PRINT_CCONTEXT_L1("r = " << 200);
context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
MLOG_P2P_MESSAGE("-->>NOTIFY_REQUEST_CHAIN: m_block_ids.size()=" << r.block_ids.size() << ", start_from_current_chain " << start_from_current_chain);
post_notify<NOTIFY_REQUEST_CHAIN>(r, context);
MLOG_PEER_STATE("requesting chain");
}else
{
CHECK_AND_ASSERT_MES(context.m_last_response_height == context.m_remote_blockchain_height-1
&& !context.m_needed_objects.size()
&& !context.m_requested_objects.size(), false, "request_missing_blocks final condition failed!"
<< "\r\nm_last_response_height=" << context.m_last_response_height
<< "\r\nm_remote_blockchain_height=" << context.m_remote_blockchain_height
<< "\r\nm_needed_objects.size()=" << context.m_needed_objects.size()
<< "\r\nm_requested_objects.size()=" << context.m_requested_objects.size()
<< "\r\non connection [" << epee::net_utils::print_connection_context_short(context)<< "]");
context.m_state = cryptonote_connection_context::state_normal;
if (context.m_remote_blockchain_height >= m_core.get_target_blockchain_height())
{
if (m_core.get_current_blockchain_height() >= m_core.get_target_blockchain_height())
{
MGINFO_GREEN("SYNCHRONIZED OK");
on_connection_synchronized();
}
}
else
{
MINFO(context << " we've reached this peer's blockchain height");
}
}
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::on_connection_synchronized()
{
bool val_expected = false;
if(m_synchronized.compare_exchange_strong(val_expected, true))
{
MGINFO_YELLOW(ENDL << "**********************************************************************" << ENDL
<< "You are now synchronized with the network. You may now start monero-wallet-cli." << ENDL
<< ENDL
<< "Use the \"help\" command to see the list of available commands." << ENDL
<< "**********************************************************************");
m_sync_timer.pause();
if (ELPP->vRegistry()->allowed(el::Level::Info, "sync-info"))
{
const uint64_t sync_time = m_sync_timer.value();
const uint64_t add_time = m_add_timer.value();
if (sync_time && add_time)
{
MCLOG_YELLOW(el::Level::Info, "sync-info", "Sync time: " << sync_time/1e9/60 << " min, idle time " <<
(100.f * (1.0f - add_time / (float)sync_time)) << "%" << ", " <<
(10 * m_sync_download_objects_size / 1024 / 1024) / 10.f << " + " <<
(10 * m_sync_download_chain_size / 1024 / 1024) / 10.f << " MB downloaded, " <<
100.0f * m_sync_old_spans_downloaded / m_sync_spans_downloaded << "% old spans, " <<
100.0f * m_sync_bad_spans_downloaded / m_sync_spans_downloaded << "% bad spans");
}
}
m_core.on_synchronized();
}
m_core.safesyncmode(true);
m_p2p->clear_used_stripe_peers();
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
size_t t_cryptonote_protocol_handler<t_core>::get_synchronizing_connections_count()
{
size_t count = 0;
m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool{
if(context.m_state == cryptonote_connection_context::state_synchronizing)
++count;
return true;
});
return count;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
int t_cryptonote_protocol_handler<t_core>::handle_response_chain_entry(int command, NOTIFY_RESPONSE_CHAIN_ENTRY::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_RESPONSE_CHAIN_ENTRY: m_block_ids.size()=" << arg.m_block_ids.size()
<< ", m_start_height=" << arg.start_height << ", m_total_height=" << arg.total_height);
MLOG_PEER_STATE("received chain");
context.m_last_request_time = boost::date_time::not_a_date_time;
m_sync_download_chain_size += arg.m_block_ids.size() * sizeof(crypto::hash);
if(!arg.m_block_ids.size())
{
LOG_ERROR_CCONTEXT("sent empty m_block_ids, dropping connection");
drop_connection(context, true, false);
return 1;
}
if (arg.total_height < arg.m_block_ids.size() || arg.start_height > arg.total_height - arg.m_block_ids.size())
{
LOG_ERROR_CCONTEXT("sent invalid start/nblocks/height, dropping connection");
drop_connection(context, true, false);
return 1;
}
MDEBUG(context << "first block hash " << arg.m_block_ids.front() << ", last " << arg.m_block_ids.back());
if (arg.total_height >= CRYPTONOTE_MAX_BLOCK_NUMBER || arg.m_block_ids.size() >= CRYPTONOTE_MAX_BLOCK_NUMBER)
{
LOG_ERROR_CCONTEXT("sent wrong NOTIFY_RESPONSE_CHAIN_ENTRY, with total_height=" << arg.total_height << " and block_ids=" << arg.m_block_ids.size());
drop_connection(context, false, false);
return 1;
}
context.m_remote_blockchain_height = arg.total_height;
context.m_last_response_height = arg.start_height + arg.m_block_ids.size()-1;
if(context.m_last_response_height > context.m_remote_blockchain_height)
{
LOG_ERROR_CCONTEXT("sent wrong NOTIFY_RESPONSE_CHAIN_ENTRY, with m_total_height=" << arg.total_height
<< ", m_start_height=" << arg.start_height
<< ", m_block_ids.size()=" << arg.m_block_ids.size());
drop_connection(context, false, false);
return 1;
}
uint64_t n_use_blocks = m_core.prevalidate_block_hashes(arg.start_height, arg.m_block_ids);
if (n_use_blocks + HASH_OF_HASHES_STEP <= arg.m_block_ids.size())
{
LOG_ERROR_CCONTEXT("Most blocks are invalid, dropping connection");
drop_connection(context, true, false);
return 1;
}
context.m_needed_objects.clear();
uint64_t added = 0;
for(auto& bl_id: arg.m_block_ids)
{
context.m_needed_objects.push_back(bl_id);
if (++added == n_use_blocks)
break;
}
context.m_last_response_height -= arg.m_block_ids.size() - n_use_blocks;
if (!request_missing_objects(context, false))
{
LOG_ERROR_CCONTEXT("Failed to request missing objects, dropping connection");
drop_connection(context, false, false);
return 1;
}
if (arg.total_height > m_core.get_target_blockchain_height())
m_core.set_target_blockchain_height(arg.total_height);
return 1;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::relay_block(NOTIFY_NEW_BLOCK::request& arg, cryptonote_connection_context& exclude_context)
{
NOTIFY_NEW_FLUFFY_BLOCK::request fluffy_arg = AUTO_VAL_INIT(fluffy_arg);
fluffy_arg.current_blockchain_height = arg.current_blockchain_height;
std::vector<blobdata> fluffy_txs;
fluffy_arg.b = arg.b;
fluffy_arg.b.txs = fluffy_txs;
// sort peers between fluffy ones and others
std::vector<std::pair<epee::net_utils::zone, boost::uuids::uuid>> fullConnections, fluffyConnections;
m_p2p->for_each_connection([this, &exclude_context, &fullConnections, &fluffyConnections](connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)
{
if (peer_id && exclude_context.m_connection_id != context.m_connection_id && context.m_remote_address.get_zone() == epee::net_utils::zone::public_)
{
if(m_core.fluffy_blocks_enabled() && (support_flags & P2P_SUPPORT_FLAG_FLUFFY_BLOCKS))
{
LOG_DEBUG_CC(context, "PEER SUPPORTS FLUFFY BLOCKS - RELAYING THIN/COMPACT WHATEVER BLOCK");
fluffyConnections.push_back({context.m_remote_address.get_zone(), context.m_connection_id});
}
else
{
LOG_DEBUG_CC(context, "PEER DOESN'T SUPPORT FLUFFY BLOCKS - RELAYING FULL BLOCK");
fullConnections.push_back({context.m_remote_address.get_zone(), context.m_connection_id});
}
}
return true;
});
// send fluffy ones first, we want to encourage people to run that
if (!fluffyConnections.empty())
{
std::string fluffyBlob;
epee::serialization::store_t_to_binary(fluffy_arg, fluffyBlob);
m_p2p->relay_notify_to_list(NOTIFY_NEW_FLUFFY_BLOCK::ID, epee::strspan<uint8_t>(fluffyBlob), std::move(fluffyConnections));
}
if (!fullConnections.empty())
{
std::string fullBlob;
epee::serialization::store_t_to_binary(arg, fullBlob);
m_p2p->relay_notify_to_list(NOTIFY_NEW_BLOCK::ID, epee::strspan<uint8_t>(fullBlob), std::move(fullConnections));
}
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::relay_transactions(NOTIFY_NEW_TRANSACTIONS::request& arg, cryptonote_connection_context& exclude_context)
{
const bool hide_tx_broadcast =
1 < m_p2p->get_zone_count() && exclude_context.m_remote_address.get_zone() == epee::net_utils::zone::invalid;
if (hide_tx_broadcast)
MDEBUG("Attempting to conceal origin of tx via anonymity network connection(s)");
// no check for success, so tell core they're relayed unconditionally
const bool pad_transactions = m_core.pad_transactions() || hide_tx_broadcast;
size_t bytes = pad_transactions ? 9 /* header */ + 4 /* 1 + 'txs' */ + tools::get_varint_data(arg.txs.size()).size() : 0;
for(auto tx_blob_it = arg.txs.begin(); tx_blob_it!=arg.txs.end(); ++tx_blob_it)
{
m_core.on_transaction_relayed(*tx_blob_it);
if (pad_transactions)
bytes += tools::get_varint_data(tx_blob_it->size()).size() + tx_blob_it->size();
}
if (pad_transactions)
{
// stuff some dummy bytes in to stay safe from traffic volume analysis
static constexpr size_t granularity = 1024;
size_t padding = granularity - bytes % granularity;
const size_t overhead = 2 /* 1 + '_' */ + tools::get_varint_data(padding).size();
if (overhead > padding)
padding = 0;
else
padding -= overhead;
arg._ = std::string(padding, ' ');
std::string arg_buff;
epee::serialization::store_t_to_binary(arg, arg_buff);
// we probably lowballed the payload size a bit, so added a but too much. Fix this now.
size_t remove = arg_buff.size() % granularity;
if (remove > arg._.size())
arg._.clear();
else
arg._.resize(arg._.size() - remove);
// if the size of _ moved enough, we might lose byte in size encoding, we don't care
}
std::vector<std::pair<epee::net_utils::zone, boost::uuids::uuid>> connections;
m_p2p->for_each_connection([hide_tx_broadcast, &exclude_context, &connections](connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)
{
const epee::net_utils::zone current_zone = context.m_remote_address.get_zone();
const bool broadcast_to_peer =
peer_id &&
(hide_tx_broadcast != bool(current_zone == epee::net_utils::zone::public_)) &&
exclude_context.m_connection_id != context.m_connection_id;
if (broadcast_to_peer)
connections.push_back({current_zone, context.m_connection_id});
return true;
});
if (connections.empty())
MERROR("Transaction not relayed - no" << (hide_tx_broadcast ? " privacy": "") << " peers available");
else
{
std::string fullBlob;
epee::serialization::store_t_to_binary(arg, fullBlob);
m_p2p->relay_notify_to_list(NOTIFY_NEW_TRANSACTIONS::ID, epee::strspan<uint8_t>(fullBlob), std::move(connections));
}
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
std::string t_cryptonote_protocol_handler<t_core>::get_peers_overview() const
{
std::stringstream ss;
const boost::posix_time::ptime now = boost::posix_time::microsec_clock::universal_time();
m_p2p->for_each_connection([&](const connection_context &ctx, nodetool::peerid_type peer_id, uint32_t support_flags) {
const uint32_t stripe = tools::get_pruning_stripe(ctx.m_pruning_seed);
char state_char = cryptonote::get_protocol_state_char(ctx.m_state);
ss << stripe + state_char;
if (ctx.m_last_request_time != boost::date_time::not_a_date_time)
ss << (((now - ctx.m_last_request_time).total_microseconds() > IDLE_PEER_KICK_TIME) ? "!" : "?");
ss << + " ";
return true;
});
return ss.str();
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
std::pair<uint32_t, uint32_t> t_cryptonote_protocol_handler<t_core>::get_next_needed_pruning_stripe() const
{
const uint64_t want_height_from_blockchain = m_core.get_current_blockchain_height();
const uint64_t want_height_from_block_queue = m_block_queue.get_next_needed_height(want_height_from_blockchain);
const uint64_t want_height = std::max(want_height_from_blockchain, want_height_from_block_queue);
uint64_t blockchain_height = m_core.get_target_blockchain_height();
// if we don't know the remote chain size yet, assume infinitely large so we get the right stripe if we're not near the tip
if (blockchain_height == 0)
blockchain_height = CRYPTONOTE_MAX_BLOCK_NUMBER;
const uint32_t next_pruning_stripe = tools::get_pruning_stripe(want_height, blockchain_height, CRYPTONOTE_PRUNING_LOG_STRIPES);
if (next_pruning_stripe == 0)
return std::make_pair(0, 0);
// if we already have a few peers on this stripe, but none on next one, try next one
unsigned int n_next = 0, n_subsequent = 0, n_others = 0;
const uint32_t subsequent_pruning_stripe = 1 + next_pruning_stripe % (1<<CRYPTONOTE_PRUNING_LOG_STRIPES);
m_p2p->for_each_connection([&](const connection_context &context, nodetool::peerid_type peer_id, uint32_t support_flags) {
if (context.m_state >= cryptonote_connection_context::state_synchronizing)
{
if (context.m_pruning_seed == 0 || tools::get_pruning_stripe(context.m_pruning_seed) == next_pruning_stripe)
++n_next;
else if (tools::get_pruning_stripe(context.m_pruning_seed) == subsequent_pruning_stripe)
++n_subsequent;
else
++n_others;
}
return true;
});
const bool use_next = (n_next > m_max_out_peers / 2 && n_subsequent <= 1) || (n_next > 2 && n_subsequent == 0);
const uint32_t ret_stripe = use_next ? subsequent_pruning_stripe: next_pruning_stripe;
MIDEBUG(const std::string po = get_peers_overview(), "get_next_needed_pruning_stripe: want height " << want_height << " (" <<
want_height_from_blockchain << " from blockchain, " << want_height_from_block_queue << " from block queue), stripe " <<
next_pruning_stripe << " (" << n_next << "/" << m_max_out_peers << " on it and " << n_subsequent << " on " <<
subsequent_pruning_stripe << ", " << n_others << " others) -> " << ret_stripe << " (+" <<
(ret_stripe - next_pruning_stripe + (1 << CRYPTONOTE_PRUNING_LOG_STRIPES)) % (1 << CRYPTONOTE_PRUNING_LOG_STRIPES) <<
"), current peers " << po);
return std::make_pair(next_pruning_stripe, ret_stripe);
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
bool t_cryptonote_protocol_handler<t_core>::needs_new_sync_connections() const
{
const uint64_t target = m_core.get_target_blockchain_height();
const uint64_t height = m_core.get_current_blockchain_height();
if (target && target <= height)
return false;
size_t n_out_peers = 0;
m_p2p->for_each_connection([&](cryptonote_connection_context& ctx, nodetool::peerid_type peer_id, uint32_t support_flags)->bool{
if (!ctx.m_is_income)
++n_out_peers;
return true;
});
if (n_out_peers >= m_max_out_peers)
return false;
return true;
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::drop_connection(cryptonote_connection_context &context, bool add_fail, bool flush_all_spans)
{
LOG_DEBUG_CC(context, "dropping connection id " << context.m_connection_id << " (pruning seed " <<
epee::string_tools::to_string_hex(context.m_pruning_seed) <<
"), add_fail " << add_fail << ", flush_all_spans " << flush_all_spans);
if (add_fail)
m_p2p->add_host_fail(context.m_remote_address);
m_block_queue.flush_spans(context.m_connection_id, flush_all_spans);
m_p2p->drop_connection(context);
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::on_connection_close(cryptonote_connection_context &context)
{
uint64_t target = 0;
m_p2p->for_each_connection([&](const connection_context& cntxt, nodetool::peerid_type peer_id, uint32_t support_flags) {
if (cntxt.m_state >= cryptonote_connection_context::state_synchronizing && cntxt.m_connection_id != context.m_connection_id)
target = std::max(target, cntxt.m_remote_blockchain_height);
return true;
});
const uint64_t previous_target = m_core.get_target_blockchain_height();
if (target < previous_target)
{
MINFO("Target height decreasing from " << previous_target << " to " << target);
m_core.set_target_blockchain_height(target);
}
m_block_queue.flush_spans(context.m_connection_id, false);
MLOG_PEER_STATE("closed");
}
//------------------------------------------------------------------------------------------------------------------------
template<class t_core>
void t_cryptonote_protocol_handler<t_core>::stop()
{
m_stopping = true;
m_core.stop();
}
} // namespace
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