mirror of
https://github.com/SChernykh/p2pool.git
synced 2024-08-19 21:18:46 -06:00
194 lines
5.7 KiB
C++
194 lines
5.7 KiB
C++
/*
|
|
* This file is part of the Monero P2Pool <https://github.com/SChernykh/p2pool>
|
|
* Copyright (c) 2021 SChernykh <https://github.com/SChernykh>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, version 3.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "tcp_server.h"
|
|
#include <random>
|
|
#include <unordered_map>
|
|
|
|
namespace p2pool {
|
|
|
|
class p2pool;
|
|
struct PoolBlock;
|
|
class BlockCache;
|
|
|
|
static constexpr size_t P2P_BUF_SIZE = 128 * 1024;
|
|
static constexpr size_t PEER_LIST_RESPONSE_MAX_PEERS = 16;
|
|
static constexpr int DEFAULT_P2P_PORT = 37889;
|
|
|
|
class P2PServer : public TCPServer<P2P_BUF_SIZE, P2P_BUF_SIZE>
|
|
{
|
|
public:
|
|
enum class MessageId {
|
|
HANDSHAKE_CHALLENGE = 0,
|
|
HANDSHAKE_SOLUTION = 1,
|
|
LISTEN_PORT = 2,
|
|
BLOCK_REQUEST = 3,
|
|
BLOCK_RESPONSE = 4,
|
|
BLOCK_BROADCAST = 5,
|
|
PEER_LIST_REQUEST = 6,
|
|
PEER_LIST_RESPONSE = 7,
|
|
};
|
|
|
|
explicit P2PServer(p2pool *pool);
|
|
~P2PServer();
|
|
|
|
void add_cached_block(const PoolBlock& block);
|
|
void clear_cached_blocks();
|
|
void store_in_cache(const PoolBlock& block);
|
|
|
|
void connect_to_peers(const std::string& peer_list);
|
|
void on_connect_failed(bool is_v6, const raw_ip& ip, int port) override;
|
|
|
|
struct P2PClient : public Client
|
|
{
|
|
P2PClient();
|
|
~P2PClient();
|
|
|
|
static Client* allocate() { return new P2PClient(); }
|
|
|
|
void reset() override;
|
|
bool on_connect() override;
|
|
bool on_read(char* data, uint32_t size) override;
|
|
void on_read_failed(int err) override;
|
|
void on_disconnected() override;
|
|
|
|
// Both peers send handshake challenge immediately after a connection is established
|
|
// Both peers must have the same consensus ID for handshake to succeed
|
|
// Consensus ID is never sent over the network
|
|
//
|
|
// Handshake sequence:
|
|
//
|
|
// - Both peers send 8-byte random challenges (and 8 bytes of peer ID) to each other
|
|
// - Each peer receives 8-byte challenge, chooses 8-byte random SALT and calculates H = KECCAK(CHALLENGE|CONSENSUS_ID|SALT)
|
|
// - Both peers send their H and SALT, calculate H of the other peer and check if it matches with what other peer calculated
|
|
// - Peer that initiated the connection must also provide enough PoW in H (difficulty = 10000, 5-10 ms on modern CPU)
|
|
// - If H doesn't match or doesn't have enough PoW, connection is closed immediately
|
|
enum {
|
|
CHALLENGE_SIZE = 8,
|
|
CHALLENGE_DIFFICULTY = 10000,
|
|
};
|
|
|
|
bool send_handshake_challenge();
|
|
void send_handshake_solution(const uint8_t (&challenge)[CHALLENGE_SIZE]);
|
|
bool check_handshake_solution(const hash& solution, const uint8_t (&solution_salt)[CHALLENGE_SIZE]);
|
|
|
|
bool on_handshake_challenge(const uint8_t* buf);
|
|
bool on_handshake_solution(const uint8_t* buf);
|
|
void on_after_handshake(uint8_t* &p);
|
|
bool on_listen_port(const uint8_t* buf);
|
|
bool on_block_request(const uint8_t* buf);
|
|
bool on_block_response(const uint8_t* buf, uint32_t size);
|
|
bool on_block_broadcast(const uint8_t* buf, uint32_t size);
|
|
bool on_peer_list_request(const uint8_t* buf);
|
|
bool on_peer_list_response(const uint8_t* buf) const;
|
|
|
|
bool handle_incoming_block_async(PoolBlock* block);
|
|
void handle_incoming_block(p2pool* pool, PoolBlock& block, const uint32_t reset_counter, const raw_ip& addr, std::vector<hash>& missing_blocks);
|
|
void post_handle_incoming_block(const uint32_t reset_counter, std::vector<hash>& missing_blocks);
|
|
|
|
uint64_t m_peerId;
|
|
MessageId m_expectedMessage;
|
|
uint64_t m_handshakeChallenge;
|
|
bool m_handshakeSolutionSent;
|
|
bool m_handshakeComplete;
|
|
bool m_handshakeInvalid;
|
|
int m_listenPort;
|
|
time_t m_nextPeerListRequest;
|
|
time_t m_lastAlive;
|
|
time_t m_lastBroadcastTimestamp;
|
|
time_t m_lastBlockrequestTimestamp;
|
|
|
|
uv_rwlock_t m_broadcastedHashesLock;
|
|
std::set<hash> m_broadcastedHashes;
|
|
};
|
|
|
|
void broadcast(const PoolBlock& block);
|
|
uint64_t get_random64();
|
|
uint64_t get_peerId() const { return m_peerId; }
|
|
|
|
void print_status() override;
|
|
|
|
private:
|
|
p2pool* m_pool;
|
|
BlockCache* m_cache;
|
|
bool m_cacheLoaded;
|
|
std::string m_initialPeerList;
|
|
|
|
uv_rwlock_t m_cachedBlocksLock;
|
|
std::unordered_map<hash, PoolBlock*> m_cachedBlocks;
|
|
|
|
private:
|
|
static void on_timer(uv_timer_t* timer) { reinterpret_cast<P2PServer*>(timer->data)->on_timer(); }
|
|
void on_timer();
|
|
|
|
void flush_cache();
|
|
void download_missing_blocks();
|
|
void update_peer_connections();
|
|
void update_peer_list();
|
|
void save_peer_list_async();
|
|
void save_peer_list();
|
|
void load_peer_list();
|
|
void update_peer_in_list(bool is_v6, const raw_ip& ip, int port);
|
|
void remove_peer_from_list(P2PClient* client);
|
|
void remove_peer_from_list(const raw_ip& ip);
|
|
|
|
uv_mutex_t m_rngLock;
|
|
std::random_device m_rd;
|
|
std::mt19937_64 m_rng;
|
|
|
|
uv_mutex_t m_blockLock;
|
|
PoolBlock* m_block;
|
|
|
|
uv_timer_t m_timer;
|
|
|
|
uint64_t m_peerId;
|
|
|
|
uv_mutex_t m_peerListLock;
|
|
|
|
struct Peer
|
|
{
|
|
bool m_isV6;
|
|
raw_ip m_addr;
|
|
int m_port;
|
|
uint32_t m_numFailedConnections;
|
|
};
|
|
|
|
std::vector<Peer> m_peerList;
|
|
time_t m_peerListLastSaved;
|
|
|
|
struct Broadcast
|
|
{
|
|
std::vector<uint8_t> blob;
|
|
std::vector<uint8_t> pruned_blob;
|
|
std::vector<hash> ancestor_hashes;
|
|
};
|
|
|
|
uv_mutex_t m_broadcastLock;
|
|
uv_async_t m_broadcastAsync;
|
|
std::vector<Broadcast*> m_broadcastQueue;
|
|
|
|
uv_mutex_t m_missingBlockRequestsLock;
|
|
std::set<std::pair<uint64_t, uint64_t>> m_missingBlockRequests;
|
|
|
|
static void on_broadcast(uv_async_t* handle) { reinterpret_cast<P2PServer*>(handle->data)->on_broadcast(); }
|
|
void on_broadcast();
|
|
};
|
|
|
|
} // namespace p2pool
|