blockchain/src/p2p/net_node.h

// Copyright (c) 2014-2019 Zano Project
// Copyright (c) 2014-2018 The Louisdor Project
// Copyright (c) 2012-2013 The Cryptonote developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#pragma once
#include <boost/thread.hpp>
#include <boost/bind.hpp>
#include <boost/foreach.hpp>
#include <boost/bimap.hpp>
#include <boost/multi_index_container.hpp>
#include <boost/multi_index/ordered_index.hpp>
#include <boost/multi_index/identity.hpp>
#include <boost/multi_index/member.hpp>
#include <boost/multi_index/global_fun.hpp>
#include <boost/program_options/options_description.hpp>
#include <boost/program_options/variables_map.hpp>
#include <boost/serialization/version.hpp>

#include "warnings.h"
#include "net/levin_server_cp2.h"
#include "p2p_protocol_defs.h"
#include "storages/levin_abstract_invoke2.h"
#include "net_peerlist.h"
#include "p2p_networks.h"
#include "math_helper.h"
#include "net_node_common.h"
#include "maintainers_info_boost_serialization.h"
#include "currency_core/currency_config.h"
using namespace epee;

#undef LOG_DEFAULT_CHANNEL 
#define LOG_DEFAULT_CHANNEL "p2p" 

#define CURRENT_P2P_STORAGE_ARCHIVE_VER    (CURRENCY_FORMATION_VERSION+13)

PUSH_WARNINGS
DISABLE_VS_WARNINGS(4355)

namespace nodetool
{
  template<class base_type>
  struct p2p_connection_context_t: base_type //t_payload_net_handler::connection_context //public net_utils::connection_context_base
  {
    peerid_type peer_id;
  };

  template<class t_payload_net_handler>
  class node_server: public levin::levin_commands_handler<p2p_connection_context_t<typename t_payload_net_handler::connection_context> >,
                     public i_p2p_endpoint<typename t_payload_net_handler::connection_context>,
                     public net_utils::i_connection_filter
  {
    struct by_conn_id{};
    struct by_peer_id{};
    struct by_addr{};

    typedef p2p_connection_context_t<typename t_payload_net_handler::connection_context> p2p_connection_context;

    typedef COMMAND_HANDSHAKE_T<typename t_payload_net_handler::payload_type> COMMAND_HANDSHAKE;
    typedef COMMAND_TIMED_SYNC_T<typename t_payload_net_handler::payload_type> COMMAND_TIMED_SYNC;

  public:
    typedef t_payload_net_handler payload_net_handler;
    // Some code
    node_server(t_payload_net_handler& payload_handler):m_payload_handler(payload_handler), 
                                                        m_allow_local_ip(false), 
                                                        m_hide_my_port(false), 
                                                        m_offline_mode(false),
                                                        m_alert_mode(0), 
                                                        m_maintainers_entry_local(AUTO_VAL_INIT(m_maintainers_entry_local)),
                                                        m_maintainers_info_local(AUTO_VAL_INIT(m_maintainers_info_local)), 
                                                        m_startup_time(time(nullptr)),
                                                        m_config{},
                                                        m_have_address(false),
                                                        m_first_connection_maker_call(false),
                                                        m_listenning_port{},
                                                        m_external_port{},
                                                        m_ip_address{},
                                                        m_last_stat_request_time{},
                                                        m_use_only_priority_peers(false),
                                                        m_peer_livetime{}

    {}

    static void init_options(boost::program_options::options_description& desc);

    bool run(bool sync_call = true);
    bool init(const boost::program_options::variables_map& vm);
    bool deinit();
    bool send_stop_signal();
    bool timed_wait_server_stop(size_t mseconds_wait){ return m_net_server.timed_wait_server_stop(mseconds_wait); }

    uint32_t get_this_peer_port(){return m_listenning_port;}
    t_payload_net_handler& get_payload_object();

    template <class Archive, class t_version_type>
    void serialize(Archive &a,  const t_version_type ver)
    {
      if(ver < CURRENT_P2P_STORAGE_ARCHIVE_VER) 
        return;
      time_t local_time = time(nullptr);
      a & local_time;
      if(local_time > time(nullptr))
      {
        LOG_PRINT_L0("psp network state file have future time, skipped");
        return;
      }
      a & m_peerlist;
      a & m_maintainers_info_local;
      a & m_maintainers_entry_local;
      a & m_blocked_ips;
    }
    // debug functions
    bool log_peerlist();
    bool log_connections();
    virtual uint64_t get_connections_count();
    size_t get_outgoing_connections_count();
    peerlist_manager& get_peerlist_manager(){return m_peerlist;}
    bool handle_maintainers_entry(const maintainers_entry& me);
    bool get_maintainers_info(maintainers_info_external& me);
    typedef COMMAND_REQUEST_STAT_INFO_T<typename t_payload_net_handler::stat_info> COMMAND_REQUEST_STAT_INFO;
  private:


    CHAIN_LEVIN_INVOKE_MAP2(p2p_connection_context); //move levin_commands_handler interface invoke(...) callbacks into invoke map
    CHAIN_LEVIN_NOTIFY_MAP2(p2p_connection_context); //move levin_commands_handler interface notify(...) callbacks into nothing

    BEGIN_INVOKE_MAP2(node_server)
      HANDLE_INVOKE_T2(COMMAND_HANDSHAKE, &node_server::handle_handshake)
      HANDLE_INVOKE_T2(COMMAND_TIMED_SYNC, &node_server::handle_timed_sync)
      HANDLE_INVOKE_T2(COMMAND_PING, &node_server::handle_ping)
#ifdef ALLOW_DEBUG_COMMANDS
      HANDLE_INVOKE_T2(COMMAND_REQUEST_STAT_INFO, &node_server::handle_get_stat_info)
      HANDLE_INVOKE_T2(COMMAND_REQUEST_NETWORK_STATE, &node_server::handle_get_network_state)
      HANDLE_INVOKE_T2(COMMAND_REQUEST_PEER_ID, &node_server::handle_get_peer_id)
      HANDLE_INVOKE_T2(COMMAND_REQUEST_LOG, &node_server::handle_request_log)
      HANDLE_INVOKE_T2(COMMAND_SET_LOG_LEVEL, &node_server::handle_set_log_level)
#endif
      CHAIN_INVOKE_MAP_TO_OBJ_FORCE_CONTEXT(m_payload_handler, typename t_payload_net_handler::connection_context&)
    END_INVOKE_MAP2()

    //----------------- commands handlers ----------------------------------------------
    int handle_handshake(int command, typename COMMAND_HANDSHAKE::request& arg, typename COMMAND_HANDSHAKE::response& rsp, p2p_connection_context& context);
    int handle_timed_sync(int command, typename COMMAND_TIMED_SYNC::request& arg, typename COMMAND_TIMED_SYNC::response& rsp, p2p_connection_context& context);
    int handle_ping(int command, COMMAND_PING::request& arg, COMMAND_PING::response& rsp, p2p_connection_context& context);
#ifdef ALLOW_DEBUG_COMMANDS
  public:
    int handle_get_stat_info(int command, typename COMMAND_REQUEST_STAT_INFO::request& arg, typename COMMAND_REQUEST_STAT_INFO::response& rsp, p2p_connection_context& context);
    int handle_get_network_state(int command, COMMAND_REQUEST_NETWORK_STATE::request& arg, COMMAND_REQUEST_NETWORK_STATE::response& rsp, p2p_connection_context& context);
    int handle_get_peer_id(int command, COMMAND_REQUEST_PEER_ID::request& arg, COMMAND_REQUEST_PEER_ID::response& rsp, p2p_connection_context& context);
    int handle_request_log(int command, COMMAND_REQUEST_LOG::request& arg, COMMAND_REQUEST_LOG::response& rsp, p2p_connection_context& context);
    int handle_set_log_level(int command, COMMAND_SET_LOG_LEVEL::request& arg, COMMAND_SET_LOG_LEVEL::response& rsp, p2p_connection_context& context);
  private:
#endif
    bool init_config();
    bool make_default_config();
    bool store_config();
    bool check_trust(const proof_of_trust& tr);


    //----------------- levin_commands_handler -------------------------------------------------------------
    virtual void on_connection_new(p2p_connection_context& context);
    virtual void on_connection_close(p2p_connection_context& context);
    virtual void callback(p2p_connection_context& context);
    //----------------- i_p2p_endpoint -------------------------------------------------------------
    virtual bool relay_notify_to_all(int command, const std::string& data_buff, const epee::net_utils::connection_context_base& context, std::list<epee::net_utils::connection_context_base>& relayed_peers);
    virtual bool invoke_command_to_peer(int command, const std::string& req_buff, std::string& resp_buff, const epee::net_utils::connection_context_base& context);
    virtual bool invoke_notify_to_peer(int command, const std::string& req_buff, const epee::net_utils::connection_context_base& context);
    virtual bool drop_connection(const epee::net_utils::connection_context_base& context);
    virtual void request_callback(const epee::net_utils::connection_context_base& context);
    virtual void get_connections(std::list<typename t_payload_net_handler::connection_context>& connections);
    virtual void for_each_connection(std::function<bool(typename t_payload_net_handler::connection_context&, peerid_type)> f);
    virtual bool block_ip(uint32_t adress);
    virtual bool add_ip_fail(uint32_t address);
    virtual bool is_stop_signal_sent();
    //----------------- i_connection_filter  --------------------------------------------------------
    virtual bool is_remote_ip_allowed(uint32_t adress);
    //-----------------------------------------------------------------------------------------------
    bool parse_peer_from_string(nodetool::net_address& pe, const std::string& node_addr);
    bool handle_command_line(const boost::program_options::variables_map& vm);
    bool idle_worker();
    bool handle_remote_peerlist(const std::list<peerlist_entry>& peerlist, time_t local_time, const net_utils::connection_context_base& context);
    bool get_local_node_data(basic_node_data& node_data);
    //bool get_local_handshake_data(handshake_data& hshd);

    bool merge_peerlist_with_local(const std::list<peerlist_entry>& bs);
    bool fix_time_delta(std::list<peerlist_entry>& local_peerlist, time_t local_time, int64_t& delta);

    bool connections_maker();
    bool peer_sync_idle_maker();
    bool do_handshake_with_peer(peerid_type& pi, p2p_connection_context& context, bool just_take_peerlist = false);
    bool do_peer_timed_sync(const net_utils::connection_context_base& context, peerid_type peer_id);

    bool make_new_connection_from_peerlist(bool use_white_list);
    bool try_to_connect_and_handshake_with_new_peer(const net_address& na, bool just_take_peerlist = false, uint64_t last_seen_stamp = 0, bool white = true);
    size_t get_random_index_with_fixed_probability(size_t max_index);
    bool is_peer_used(const peerlist_entry& peer);
    bool is_addr_connected(const net_address& peer);  
    template<class t_callback>
    bool try_ping(basic_node_data& node_data, p2p_connection_context& context, const t_callback& cb);
    bool make_expected_connections_count(bool white_list, size_t expected_connections);
    void cache_connect_fail_info(const net_address& addr);
    bool is_addr_recently_failed(const net_address& addr);
    bool fill_maintainers_entry(maintainers_entry& me);
    bool on_maintainers_entry_update();
    bool handle_alert_conditions();
    /*this code is temporary here(to show regular message if need), until we get normal GUI*/
    bool calm_alert_worker();
    bool urgent_alert_worker();
    bool critical_alert_worker();
    bool remove_dead_connections();


    //debug functions
    std::string print_connections_container();
    
    typedef net_utils::boosted_tcp_server<levin::async_protocol_handler<p2p_connection_context> > net_server;

    struct config
    {
      network_config m_net_config;
      uint64_t m_peer_id;

      BEGIN_KV_SERIALIZE_MAP()
        KV_SERIALIZE(m_net_config)
        KV_SERIALIZE(m_peer_id)
      END_KV_SERIALIZE_MAP()
    };

    config m_config;
    std::string m_config_folder;

    bool m_have_address;
    bool m_first_connection_maker_call;
    uint32_t m_listenning_port;
    uint32_t m_external_port;
    uint32_t m_ip_address;
    bool m_allow_local_ip;
    bool m_hide_my_port;
    bool m_offline_mode;
    uint64_t m_startup_time;

    //critical_section m_connections_lock;
    //connections_indexed_container m_connections;

    t_payload_net_handler& m_payload_handler;
    peerlist_manager m_peerlist;

    math_helper::once_a_time_seconds<P2P_DEFAULT_HANDSHAKE_INTERVAL> m_peer_handshake_idle_maker_interval;
    math_helper::once_a_time_seconds<1> m_connections_maker_interval;
    math_helper::once_a_time_seconds<60*30, false> m_peerlist_store_interval;
    math_helper::once_a_time_seconds<60> m_remove_dead_conn_interval;
    
    /*this code is temporary here(to show regular message if need), until we get normal GUI*/
    math_helper::once_a_time_seconds<60, false>  m_calm_alert_interval;
    math_helper::once_a_time_seconds<10, false>  m_urgent_alert_interval;
    math_helper::once_a_time_seconds<1, false>   m_critical_alert_interval;

    std::string m_bind_ip;
    std::string m_port;
#ifdef ALLOW_DEBUG_COMMANDS
    int64_t m_last_stat_request_time;
#endif
    std::list<net_address>   m_priority_peers;
    bool m_use_only_priority_peers;
    std::vector<net_address> m_seed_nodes;
    std::list<nodetool::peerlist_entry> m_command_line_peers;
    int64_t m_peer_livetime;
    //keep connections to initiate some interactions
    net_server m_net_server;

    std::map<net_address, time_t> m_conn_fails_cache;
    critical_section m_conn_fails_cache_lock;
    crypto::public_key m_maintainers_pub_key;

    maintainers_info m_maintainers_info_local;
    maintainers_entry m_maintainers_entry_local;
    uint8_t m_alert_mode;
    critical_section m_maintainers_local_lock;
    
    critical_section m_blocked_ips_lock;
    std::map<uint32_t, time_t> m_blocked_ips;

    critical_section m_ip_fails_score_lock;
    std::map<uint32_t, uint64_t> m_ip_fails_score;

  };
}




#include "net_node.inl"

#undef LOG_DEFAULT_CHANNEL
#define LOG_DEFAULT_CHANNEL NULL

POP_WARNINGS