371 lines
12 KiB
C++
371 lines
12 KiB
C++
/*
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* This file is part of the Monero P2Pool <https://github.com/SChernykh/p2pool>
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* Copyright (c) 2021-2025 SChernykh <https://github.com/SChernykh>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "tcp_server.h"
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#include "pool_block.h"
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#include <deque>
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namespace p2pool {
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class p2pool;
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struct PoolBlock;
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class BlockCache;
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// Max block size plus BLOCK_RESPONSE header (5 bytes)
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static constexpr uint64_t P2P_BUF_SIZE = MAX_BLOCK_SIZE + (1 + sizeof(uint32_t));
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static_assert((P2P_BUF_SIZE & (P2P_BUF_SIZE - 1)) == 0, "P2P_BUF_SIZE is not a power of 2, fix MAX_BLOCK_SIZE");
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static constexpr size_t PEER_LIST_RESPONSE_MAX_PEERS = 16;
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static constexpr int DEFAULT_P2P_PORT = 37889;
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static constexpr int DEFAULT_P2P_PORT_MINI = 37888;
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static constexpr int DEFAULT_P2P_PORT_NANO = 37890;
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static constexpr int DEFAULT_P2P_PORT_ONION = 28722;
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static constexpr uint32_t PROTOCOL_VERSION_1_0 = 0x00010000UL;
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static constexpr uint32_t PROTOCOL_VERSION_1_1 = 0x00010001UL;
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static constexpr uint32_t PROTOCOL_VERSION_1_2 = 0x00010002UL;
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static constexpr uint32_t PROTOCOL_VERSION_1_3 = 0x00010003UL;
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static constexpr uint32_t PROTOCOL_VERSION_1_4 = 0x00010004UL;
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static constexpr uint32_t SUPPORTED_PROTOCOL_VERSION = PROTOCOL_VERSION_1_4;
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class P2PServer : public TCPServer
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{
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public:
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enum class MessageId {
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HANDSHAKE_CHALLENGE,
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HANDSHAKE_SOLUTION,
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LISTEN_PORT,
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BLOCK_REQUEST,
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BLOCK_RESPONSE,
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BLOCK_BROADCAST,
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PEER_LIST_REQUEST,
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PEER_LIST_RESPONSE,
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BLOCK_BROADCAST_COMPACT,
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BLOCK_NOTIFY,
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// Donation messages are signed by author's private keys to prevent their abuse/misuse.
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AUX_JOB_DONATION,
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// Broadcast 3rd-party Monero blocks to make the whole Monero network faster
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MONERO_BLOCK_BROADCAST,
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LAST = MONERO_BLOCK_BROADCAST,
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};
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explicit P2PServer(p2pool *pool);
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~P2PServer() override;
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void add_cached_block(const PoolBlock& block);
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void clear_cached_blocks();
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void store_in_cache(const PoolBlock& block);
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void connect_to_peers_async(const char* peer_list);
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void connect_to_peers(const std::string& peer_list);
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void on_connect_failed(bool is_v6, const raw_ip& ip, int port) override;
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struct P2PClient : public Client
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{
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P2PClient();
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~P2PClient() override;
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static Client* allocate() { return new P2PClient(); }
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virtual size_t size() const override { return sizeof(P2PClient); }
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void reset() override;
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[[nodiscard]] bool on_connect() override;
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[[nodiscard]] bool on_read(const char* data, uint32_t size) override;
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void on_read_failed(int err) override;
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void on_disconnected() override;
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// Both peers send handshake challenge immediately after a connection is established
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// Both peers must have the same consensus ID for handshake to succeed
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// Consensus ID is never sent over the network
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//
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// Handshake sequence:
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//
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// - Both peers send 8-byte random challenges (and 8 bytes of peer ID) to each other
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// - Each peer receives 8-byte challenge, chooses 8-byte random SALT and calculates H = KECCAK(CHALLENGE|CONSENSUS_ID|SALT)
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// - Both peers send their H and SALT, calculate H of the other peer and check if it matches with what other peer calculated
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// - Peer that initiated the connection must also provide enough PoW in H (difficulty = 10000, 5-10 ms on modern CPU)
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// - If H doesn't match or doesn't have enough PoW, connection is closed immediately
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enum {
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CHALLENGE_SIZE = 8,
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CHALLENGE_DIFFICULTY = 10000,
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};
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[[nodiscard]] bool send_handshake_challenge();
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void send_handshake_solution(const uint8_t (&challenge)[CHALLENGE_SIZE]);
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[[nodiscard]] bool check_handshake_solution(const hash& solution, const uint8_t (&solution_salt)[CHALLENGE_SIZE]) const;
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[[nodiscard]] bool on_handshake_challenge(const uint8_t* buf);
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[[nodiscard]] bool on_handshake_solution(const uint8_t* buf);
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void on_after_handshake(uint8_t* &p);
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[[nodiscard]] bool on_listen_port(const uint8_t* buf);
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[[nodiscard]] bool on_block_request(const uint8_t* buf);
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[[nodiscard]] bool on_block_response(const uint8_t* buf, uint32_t size, uint64_t expected_id);
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[[nodiscard]] bool on_block_broadcast(const uint8_t* buf, uint32_t size, bool compact);
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[[nodiscard]] bool on_peer_list_request(const uint8_t* buf);
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void on_peer_list_response(const uint8_t* buf);
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void on_block_notify(const uint8_t* buf);
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[[nodiscard]] bool on_aux_job_donation(const uint8_t* buf, uint32_t size);
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[[nodiscard]] bool on_monero_block_broadcast(const uint8_t* buf, uint32_t size);
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[[nodiscard]] bool handle_incoming_block_async(const PoolBlock* block, uint64_t max_time_delta = 0);
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static void handle_incoming_block(p2pool* pool, PoolBlock& block, std::vector<hash>& missing_blocks, bool& result);
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void post_handle_incoming_block(p2pool* pool, const PoolBlock& block, const uint32_t reset_counter, bool is_v6, const raw_ip& addr, std::vector<hash>& missing_blocks, const bool result);
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[[nodiscard]] bool is_good() const { return m_handshakeComplete && !m_handshakeInvalid && (m_listenPort >= 0); }
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alignas(8) char m_p2pReadBuf[P2P_BUF_SIZE];
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uint64_t m_peerId;
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uint64_t m_connectedTime;
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uint64_t m_broadcastMaxHeight;
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MessageId m_expectedMessage;
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uint64_t m_handshakeChallenge;
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bool m_handshakeSolutionSent;
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bool m_handshakeComplete;
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bool m_handshakeInvalid;
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int m_listenPort;
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uint64_t m_prevPeersSent;
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uint64_t m_nextOutgoingPeerListRequest;
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std::chrono::high_resolution_clock::time_point m_lastPeerListRequestTime;
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int m_peerListPendingRequests;
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uint32_t m_protocolVersion;
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uint32_t m_SoftwareVersion;
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SoftwareID m_SoftwareID;
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int64_t m_pingTime;
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std::deque<uint64_t> m_blockPendingRequests;
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uint64_t m_lastAlive;
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uint64_t m_lastBroadcastTimestamp;
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uint64_t m_lastBlockrequestTimestamp;
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hash m_broadcastedHashes[8];
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uint32_t m_broadcastedHashesIndex;
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hash m_lastMoneroBlockBroadcastDigest;
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// log::Stream wrapper
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struct SoftwareDisplayName
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{
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FORCEINLINE SoftwareDisplayName(SoftwareID id, uint32_t version) : m_id(id), m_version(version) {}
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SoftwareID m_id;
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uint32_t m_version;
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};
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};
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struct Broadcast
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{
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Broadcast(const PoolBlock& block, const PoolBlock* parent);
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hash id;
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uint64_t received_timestamp;
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std::vector<uint8_t> blob;
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std::vector<uint8_t> pruned_blob;
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std::vector<uint8_t> compact_blob;
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std::vector<hash> ancestor_hashes;
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};
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void broadcast(const PoolBlock& block, const PoolBlock* parent);
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[[nodiscard]] uint64_t get_random64();
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[[nodiscard]] uint64_t get_peerId(bool is_tor) const { return is_tor ? m_peerId_TOR : m_peerId; }
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void print_status() override;
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void show_peers_async();
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[[nodiscard]] size_t peer_list_size() const { MutexLock lock(m_peerListLock); return m_peerList.size(); }
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[[nodiscard]] int external_listen_port() const override;
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[[nodiscard]] uint32_t max_outgoing_peers() const { return m_maxOutgoingPeers; }
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[[nodiscard]] uint32_t max_incoming_peers() const { return m_maxIncomingPeers; }
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void set_max_outgoing_peers(uint32_t n) { m_maxOutgoingPeers = std::min(std::max(n, 10U), 450U); }
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void set_max_incoming_peers(uint32_t n) { m_maxIncomingPeers = std::min(std::max(n, 10U), 450U); }
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[[nodiscard]] int deserialize_block(const uint8_t* buf, uint32_t size, bool compact, uint64_t received_timestamp);
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[[nodiscard]] const PoolBlock* get_block() const { return m_block; }
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[[nodiscard]] const PoolBlock* find_block(const hash& id) const;
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void check_for_updates(bool forced = false) const;
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bool disconnected() const { return m_seenGoodPeers && (m_numConnections == 0); };
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#ifdef WITH_MERGE_MINING_DONATION
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void broadcast_aux_job_donation_async(const uint8_t* data, uint32_t data_size, uint64_t timestamp);
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#endif
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void broadcast_aux_job_donation(const uint8_t* data, uint32_t data_size, uint64_t timestamp, const P2PClient* source, bool duplicate_check_done);
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void broadcast_monero_block_async(std::vector<std::vector<uint8_t>>&& blobs);
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void broadcast_monero_block_handler();
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void broadcast_monero_block(const uint8_t* data, uint32_t data_size, const P2PClient* source, bool duplicate_check_done);
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bool store_monero_block_broadcast(const hash& digest);
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private:
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[[nodiscard]] const char* get_log_category() const override;
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p2pool* m_pool;
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BlockCache* m_cache;
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bool m_cacheLoaded;
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std::string m_initialPeerList;
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uint32_t m_maxOutgoingPeers;
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uint32_t m_maxIncomingPeers;
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uv_rwlock_t m_cachedBlocksLock;
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unordered_map<hash, PoolBlock*>* m_cachedBlocks;
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private:
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static void on_timer(uv_timer_t* timer) { reinterpret_cast<P2PServer*>(timer->data)->on_timer(); }
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void on_timer();
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void flush_cache();
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void download_missing_blocks();
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void check_host();
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void check_block_template();
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void update_peer_connections();
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void update_peer_list();
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void send_peer_list_request(P2PClient* client, uint64_t cur_time);
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void save_peer_list_async();
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void save_peer_list();
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void load_peer_list();
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void load_monerod_peer_list();
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void update_peer_in_list(bool is_v6, const raw_ip& ip, int port);
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void remove_peer_from_list(const P2PClient* client);
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void remove_peer_from_list(const raw_ip& ip);
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std::mt19937_64 m_rng;
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uv_mutex_t m_blockLock;
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PoolBlock* m_block;
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std::vector<uint8_t> m_blockDeserializeBuf;
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int m_blockDeserializeResult;
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uv_timer_t m_timer;
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uint64_t m_timerCounter;
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uint64_t m_timerInterval;
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uint64_t m_peerId;
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uint64_t m_peerId_TOR;
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mutable uv_mutex_t m_peerListLock;
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struct Peer
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{
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void normalize();
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bool m_isV6;
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raw_ip m_addr;
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int m_port;
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uint32_t m_numFailedConnections;
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uint64_t m_lastSeen;
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};
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std::atomic<bool> m_seenGoodPeers;
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std::vector<Peer> m_peerList;
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std::vector<Peer> m_peerListMonero;
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std::atomic<uint64_t> m_peerListLastSaved;
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std::atomic<uint32_t> m_numOnionConnections;
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uv_mutex_t m_broadcastLock;
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uv_async_t m_broadcastAsync;
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std::vector<Broadcast*> m_broadcastQueue;
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bool m_lookForMissingBlocks;
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unordered_set<std::pair<uint64_t, uint64_t>> m_missingBlockRequests;
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unordered_set<uint64_t> m_blockNotifyRequests;
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P2PClient* m_fastestPeer;
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std::atomic<bool> m_newP2PoolVersionDetected;
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static void on_broadcast(uv_async_t* handle) { reinterpret_cast<P2PServer*>(handle->data)->on_broadcast(); }
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void on_broadcast();
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uv_mutex_t m_connectToPeersLock;
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uv_async_t m_connectToPeersAsync;
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std::string m_connectToPeersData;
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static void on_connect_to_peers(uv_async_t* handle);
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uv_mutex_t m_showPeersLock;
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uv_async_t m_showPeersAsync;
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static void on_show_peers(uv_async_t* handle) { reinterpret_cast<P2PServer*>(handle->data)->show_peers(); }
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void show_peers() const;
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void on_shutdown() override;
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void api_update_local_stats();
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enum {
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AUX_JOB_TIMEOUT = 3600,
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MONERO_BROADCAST_TIMEOUT = 3600 * 6,
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};
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unordered_set<std::pair<uint64_t, uint64_t>> m_auxJobMessages;
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std::vector<uint8_t> m_auxJobLastMessage;
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uint64_t m_auxJobLastMessageTimestamp;
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uv_mutex_t m_MoneroBlockBroadcastsLock;
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unordered_map<uint64_t, uint64_t> m_MoneroBlockBroadcasts;
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void send_aux_job_donation(P2PServer::P2PClient* client, const uint8_t* data, uint32_t data_size);
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void clean_aux_job_messages();
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#ifdef WITH_MERGE_MINING_DONATION
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struct AuxJobBroadcast
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{
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std::vector<uint8_t> job;
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uint64_t timestamp = 0;
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};
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uv_mutex_t m_AuxJobBroadcastLock;
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AuxJobBroadcast m_AuxJobBroadcast;
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uv_async_t m_AuxJobBroadcastAsync;
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static void on_aux_job_broadcast(uv_async_t* handle) { reinterpret_cast<P2PServer*>(handle->data)->broadcast_aux_job_donation_handler(); }
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void broadcast_aux_job_donation_handler();
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#endif
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uv_mutex_t m_MoneroBlocksToBroadcastLock;
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std::vector<std::vector<uint8_t>> m_MoneroBlocksToBroadcast;
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uv_async_t m_MoneroBlocksToBroadcastAsync;
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std::deque<std::string> m_MoneroBlocksToSubmit;
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static void on_monero_block_broadcast(uv_async_t* handle) { reinterpret_cast<P2PServer*>(handle->data)->broadcast_monero_block_handler(); }
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void clean_monero_block_broadcasts();
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void submit_monero_blocks();
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};
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} // namespace p2pool
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