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// Copyright (c) 2014-2022, 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
// Parts of this file are originally copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
#pragma once
#include <unordered_set>
#include <atomic>
#include <algorithm>
#include <boost/date_time/posix_time/posix_time.hpp>
#include "net/net_utils_base.h"
#include "crypto/hash.h"
namespace cryptonote
{
struct cryptonote_connection_context: public epee::net_utils::connection_context_base
{
cryptonote_connection_context(): m_state(state_before_handshake), m_remote_blockchain_height(0), m_last_response_height(0),
m_last_request_time(boost::date_time::not_a_date_time), m_callback_request_count(0),
m_last_known_hash(crypto::null_hash), m_pruning_seed(0), m_rpc_port(0), m_rpc_credits_per_hash(0), m_anchor(false), m_score(0),
m_expect_response(0), m_expect_height(0), m_num_requested(0) {}
enum state
{
state_before_handshake = 0, //default state
state_synchronizing,
state_standby,
state_idle,
state_normal
};
/*
This class was originally from the EPEE module. It is identical in function to std::atomic<uint32_t> except
that it has copy-construction and copy-assignment defined, which means that earliers devs didn't have to write
custom copy-contructors and copy-assingment operators for the outer class, cryptonote_connection_context.
cryptonote_connection_context should probably be refactored because it is both trying to be POD-like while
also (very loosely) controlling access to its atomic members.
*/
class copyable_atomic: public std::atomic<uint32_t>
{
public:
copyable_atomic()
{};
copyable_atomic(uint32_t value)
{ store(value); }
copyable_atomic(const copyable_atomic& a):std::atomic<uint32_t>(a.load())
{}
copyable_atomic& operator= (const copyable_atomic& a)
{
store(a.load());
return *this;
}
uint32_t operator++()
{
return std::atomic<uint32_t>::operator++();
}
uint32_t operator++(int fake)
{
return std::atomic<uint32_t>::operator++(fake);
}
};
static constexpr int handshake_command() noexcept { return 1001; }
bool handshake_complete() const noexcept { return m_state != state_before_handshake; }
//! \return Maximum number of bytes permissible for `command`.
static size_t get_max_bytes(int command) noexcept;
state m_state;
std::vector<std::pair<crypto::hash, uint64_t>> m_needed_objects;
std::unordered_set<crypto::hash> m_requested_objects;
uint64_t m_remote_blockchain_height;
uint64_t m_last_response_height;
boost::posix_time::ptime m_last_request_time;
copyable_atomic m_callback_request_count; //in debug purpose: problem with double callback rise
crypto::hash m_last_known_hash;
uint32_t m_pruning_seed;
uint16_t m_rpc_port;
uint32_t m_rpc_credits_per_hash;
bool m_anchor;
int32_t m_score;
int m_expect_response;
uint64_t m_expect_height;
size_t m_num_requested;
copyable_atomic m_new_stripe_notification{0};
copyable_atomic m_idle_peer_notification{0};
};
inline std::string get_protocol_state_string(cryptonote_connection_context::state s)
{
switch (s)
{
case cryptonote_connection_context::state_before_handshake:
return "before_handshake";
case cryptonote_connection_context::state_synchronizing:
return "synchronizing";
case cryptonote_connection_context::state_standby:
return "standby";
case cryptonote_connection_context::state_idle:
return "idle";
case cryptonote_connection_context::state_normal:
return "normal";
default:
return "unknown";
}
}
inline char get_protocol_state_char(cryptonote_connection_context::state s)
{
switch (s)
{
case cryptonote_connection_context::state_before_handshake:
return 'h';
case cryptonote_connection_context::state_synchronizing:
return 's';
case cryptonote_connection_context::state_standby:
return 'w';
case cryptonote_connection_context::state_idle:
return 'i';
case cryptonote_connection_context::state_normal:
return 'n';
default:
return 'u';
}
}
}
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