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

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

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9.1 KiB
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/// @file
/// @author rfree (current maintainer/user in monero.cc project - most of code is from CryptoNote)
/// @brief This is the orginal cryptonote protocol network-events handler, modified by us
// Copyright (c) 2014-2017, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#pragma once
#include <boost/program_options/variables_map.hpp>
#include <string>
#include <ctime>
#include "math_helper.h"
#include "storages/levin_abstract_invoke2.h"
#include "warnings.h"
#include "cryptonote_protocol_defs.h"
#include "cryptonote_protocol_handler_common.h"
#include "block_queue.h"
#include "cryptonote_basic/connection_context.h"
#include "cryptonote_basic/cryptonote_stat_info.h"
#include "cryptonote_basic/verification_context.h"
// #include <netinet/in.h>
#include <boost/circular_buffer.hpp>
PUSH_WARNINGS
DISABLE_VS_WARNINGS(4355)
#define LOCALHOST_INT 2130706433
namespace cryptonote
{
class cryptonote_protocol_handler_base_pimpl;
class cryptonote_protocol_handler_base {
private:
std::unique_ptr<cryptonote_protocol_handler_base_pimpl> mI;
public:
cryptonote_protocol_handler_base();
virtual ~cryptonote_protocol_handler_base();
void handler_request_blocks_history(std::list<crypto::hash>& ids); // before asking for list of objects, we can change the list still
void handler_response_blocks_now(size_t packet_size);
virtual double get_avg_block_size() = 0;
virtual double estimate_one_block_size() noexcept; // for estimating size of blocks to download
};
template<class t_core>
class t_cryptonote_protocol_handler: public i_cryptonote_protocol, cryptonote_protocol_handler_base
{
public:
typedef cryptonote_connection_context connection_context;
typedef core_stat_info stat_info;
typedef t_cryptonote_protocol_handler<t_core> cryptonote_protocol_handler;
typedef CORE_SYNC_DATA payload_type;
t_cryptonote_protocol_handler(t_core& rcore, nodetool::i_p2p_endpoint<connection_context>* p_net_layout);
BEGIN_INVOKE_MAP2(cryptonote_protocol_handler)
HANDLE_NOTIFY_T2(NOTIFY_NEW_BLOCK, &cryptonote_protocol_handler::handle_notify_new_block)
HANDLE_NOTIFY_T2(NOTIFY_NEW_TRANSACTIONS, &cryptonote_protocol_handler::handle_notify_new_transactions)
HANDLE_NOTIFY_T2(NOTIFY_REQUEST_GET_OBJECTS, &cryptonote_protocol_handler::handle_request_get_objects)
HANDLE_NOTIFY_T2(NOTIFY_RESPONSE_GET_OBJECTS, &cryptonote_protocol_handler::handle_response_get_objects)
HANDLE_NOTIFY_T2(NOTIFY_REQUEST_CHAIN, &cryptonote_protocol_handler::handle_request_chain)
HANDLE_NOTIFY_T2(NOTIFY_RESPONSE_CHAIN_ENTRY, &cryptonote_protocol_handler::handle_response_chain_entry)
HANDLE_NOTIFY_T2(NOTIFY_NEW_FLUFFY_BLOCK, &cryptonote_protocol_handler::handle_notify_new_fluffy_block)
HANDLE_NOTIFY_T2(NOTIFY_REQUEST_FLUFFY_MISSING_TX, &cryptonote_protocol_handler::handle_request_fluffy_missing_tx)
END_INVOKE_MAP2()
bool on_idle();
bool init(const boost::program_options::variables_map& vm);
bool deinit();
void set_p2p_endpoint(nodetool::i_p2p_endpoint<connection_context>* p2p);
//bool process_handshake_data(const blobdata& data, cryptonote_connection_context& context);
bool process_payload_sync_data(const CORE_SYNC_DATA& hshd, cryptonote_connection_context& context, bool is_inital);
bool get_payload_sync_data(blobdata& data);
bool get_payload_sync_data(CORE_SYNC_DATA& hshd);
bool get_stat_info(core_stat_info& stat_inf);
bool on_callback(cryptonote_connection_context& context);
t_core& get_core(){return m_core;}
bool is_synchronized(){return m_synchronized;}
void log_connections();
std::list<connection_info> get_connections();
const block_queue &get_block_queue() const { return m_block_queue; }
void stop();
void on_connection_close(cryptonote_connection_context &context);
private:
//----------------- commands handlers ----------------------------------------------
int handle_notify_new_block(int command, NOTIFY_NEW_BLOCK::request& arg, cryptonote_connection_context& context);
int handle_notify_new_transactions(int command, NOTIFY_NEW_TRANSACTIONS::request& arg, cryptonote_connection_context& context);
int handle_request_get_objects(int command, NOTIFY_REQUEST_GET_OBJECTS::request& arg, cryptonote_connection_context& context);
int handle_response_get_objects(int command, NOTIFY_RESPONSE_GET_OBJECTS::request& arg, cryptonote_connection_context& context);
int handle_request_chain(int command, NOTIFY_REQUEST_CHAIN::request& arg, cryptonote_connection_context& context);
int handle_response_chain_entry(int command, NOTIFY_RESPONSE_CHAIN_ENTRY::request& arg, cryptonote_connection_context& context);
int handle_notify_new_fluffy_block(int command, NOTIFY_NEW_FLUFFY_BLOCK::request& arg, cryptonote_connection_context& context);
int handle_request_fluffy_missing_tx(int command, NOTIFY_REQUEST_FLUFFY_MISSING_TX::request& arg, cryptonote_connection_context& context);
//----------------- i_bc_protocol_layout ---------------------------------------
virtual bool relay_block(NOTIFY_NEW_BLOCK::request& arg, cryptonote_connection_context& exclude_context);
virtual bool relay_transactions(NOTIFY_NEW_TRANSACTIONS::request& arg, cryptonote_connection_context& exclude_context);
//----------------------------------------------------------------------------------
//bool get_payload_sync_data(HANDSHAKE_DATA::request& hshd, cryptonote_connection_context& context);
bool request_missing_objects(cryptonote_connection_context& context, bool check_having_blocks, bool force_next_span = false);
size_t get_synchronizing_connections_count();
bool on_connection_synchronized();
bool should_download_next_span(cryptonote_connection_context& context) const;
void drop_connection(cryptonote_connection_context &context, bool add_fail, bool flush_all_spans);
bool kick_idle_peers();
int try_add_next_blocks(cryptonote_connection_context &context);
t_core& m_core;
nodetool::p2p_endpoint_stub<connection_context> m_p2p_stub;
nodetool::i_p2p_endpoint<connection_context>* m_p2p;
std::atomic<uint32_t> m_syncronized_connections_count;
std::atomic<bool> m_synchronized;
std::atomic<bool> m_stopping;
boost::mutex m_sync_lock;
block_queue m_block_queue;
epee::math_helper::once_a_time_seconds<30> m_idle_peer_kicker;
boost::mutex m_buffer_mutex;
double get_avg_block_size();
boost::circular_buffer<size_t> m_avg_buffer = boost::circular_buffer<size_t>(10);
template<class t_parameter>
bool post_notify(typename t_parameter::request& arg, cryptonote_connection_context& context)
{
LOG_PRINT_L2("[" << epee::net_utils::print_connection_context_short(context) << "] post " << typeid(t_parameter).name() << " -->");
std::string blob;
epee::serialization::store_t_to_binary(arg, blob);
//handler_response_blocks_now(blob.size()); // XXX
return m_p2p->invoke_notify_to_peer(t_parameter::ID, blob, context);
}
template<class t_parameter>
bool relay_post_notify(typename t_parameter::request& arg, cryptonote_connection_context& exclude_context)
{
LOG_PRINT_L2("[" << epee::net_utils::print_connection_context_short(exclude_context) << "] post relay " << typeid(t_parameter).name() << " -->");
std::string arg_buff;
epee::serialization::store_t_to_binary(arg, arg_buff);
return m_p2p->relay_notify_to_all(t_parameter::ID, arg_buff, exclude_context);
}
};
} // namespace
#include "cryptonote_protocol_handler.inl"
POP_WARNINGS
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