mirror of
https://github.com/dashpay/dash.git
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6241 lines
287 KiB
C++
6241 lines
287 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2020 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <net_processing.h>
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#include <addrman.h>
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#include <banman.h>
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#include <blockencodings.h>
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#include <blockfilter.h>
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#include <chainparams.h>
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#include <consensus/amount.h>
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#include <consensus/validation.h>
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#include <hash.h>
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#include <index/blockfilterindex.h>
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#include <validation.h>
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#include <merkleblock.h>
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#include <netmessagemaker.h>
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#include <netbase.h>
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#include <net_types.h>
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#include <node/blockstorage.h>
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#include <node/txreconciliation.h>
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#include <policy/policy.h>
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#include <primitives/block.h>
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#include <primitives/transaction.h>
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#include <random.h>
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#include <reverse_iterator.h>
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#include <scheduler.h>
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#include <streams.h>
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#include <tinyformat.h>
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#include <index/txindex.h>
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#include <txmempool.h>
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#include <txorphanage.h>
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#include <util/check.h> // For NDEBUG compile time check
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#include <util/system.h>
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#include <util/strencodings.h>
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#include <util/trace.h>
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#include <algorithm>
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#include <atomic>
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#include <chrono>
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#include <future>
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#include <list>
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#include <memory>
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#include <optional>
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#include <typeinfo>
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#include <spork.h>
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#include <governance/governance.h>
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#include <masternode/sync.h>
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#include <masternode/meta.h>
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#ifdef ENABLE_WALLET
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#include <coinjoin/client.h>
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#endif // ENABLE_WALLET
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#include <coinjoin/context.h>
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#include <coinjoin/server.h>
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#include <evo/deterministicmns.h>
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#include <evo/mnauth.h>
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#include <evo/simplifiedmns.h>
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#include <llmq/blockprocessor.h>
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#include <llmq/chainlocks.h>
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#include <llmq/commitment.h>
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#include <llmq/context.h>
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#include <llmq/dkgsession.h>
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#include <llmq/dkgsessionmgr.h>
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#include <llmq/instantsend.h>
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#include <llmq/options.h>
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#include <llmq/quorums.h>
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#include <llmq/signing.h>
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#include <llmq/signing_shares.h>
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#include <llmq/snapshot.h>
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#include <stats/client.h>
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/** Maximum number of in-flight objects from a peer */
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static constexpr int32_t MAX_PEER_OBJECT_IN_FLIGHT = 100;
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/** Maximum number of announced objects from a peer */
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static constexpr int32_t MAX_PEER_OBJECT_ANNOUNCEMENTS = 2 * MAX_INV_SZ;
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/** How many microseconds to delay requesting transactions from inbound peers */
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static constexpr auto INBOUND_PEER_TX_DELAY{2s};
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/** How long to wait before downloading a transaction from an additional peer */
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static constexpr auto GETDATA_TX_INTERVAL{60s};
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/** Maximum delay for transaction requests to avoid biasing some peers over others. */
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static constexpr auto MAX_GETDATA_RANDOM_DELAY{2s};
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/** How long to wait (expiry * factor microseconds) before expiring an in-flight getdata request to a peer */
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static constexpr int64_t TX_EXPIRY_INTERVAL_FACTOR = 10;
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static_assert(INBOUND_PEER_TX_DELAY >= MAX_GETDATA_RANDOM_DELAY,
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"To preserve security, MAX_GETDATA_RANDOM_DELAY should not exceed INBOUND_PEER_DELAY");
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/** Limit to avoid sending big packets. Not used in processing incoming GETDATA for compatibility */
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static const unsigned int MAX_GETDATA_SZ = 1000;
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/** How long to cache transactions in mapRelay for normal relay */
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static constexpr auto RELAY_TX_CACHE_TIME = 15min;
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/** How long a transaction has to be in the mempool before it can unconditionally be relayed (even when not in mapRelay). */
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static constexpr auto UNCONDITIONAL_RELAY_DELAY = 2min;
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/** Headers download timeout.
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* Timeout = base + per_header * (expected number of headers) */
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static constexpr auto HEADERS_DOWNLOAD_TIMEOUT_BASE = 15min;
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static constexpr auto HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1ms;
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/** How long to wait for a peer to respond to a getheaders request */
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static constexpr auto HEADERS_RESPONSE_TIME{2min};
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/** Protect at least this many outbound peers from disconnection due to slow/
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* behind headers chain.
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*/
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static constexpr int32_t MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT = 4;
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/** Timeout for (unprotected) outbound peers to sync to our chainwork */
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static constexpr auto CHAIN_SYNC_TIMEOUT{20min};
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/** How frequently to check for stale tips */
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static constexpr auto STALE_CHECK_INTERVAL{150s}; // 2.5 minutes (~block interval)
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/** How frequently to check for extra outbound peers and disconnect */
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static constexpr auto EXTRA_PEER_CHECK_INTERVAL{45s};
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/** Minimum time an outbound-peer-eviction candidate must be connected for, in order to evict */
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static constexpr auto MINIMUM_CONNECT_TIME{30s};
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/** SHA256("main address relay")[0:8] */
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static constexpr uint64_t RANDOMIZER_ID_ADDRESS_RELAY = 0x3cac0035b5866b90ULL;
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/// Age after which a stale block will no longer be served if requested as
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/// protection against fingerprinting. Set to one month, denominated in seconds.
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static constexpr int STALE_RELAY_AGE_LIMIT = 30 * 24 * 60 * 60;
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/// Age after which a block is considered historical for purposes of rate
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/// limiting block relay. Set to one week, denominated in seconds.
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static constexpr int HISTORICAL_BLOCK_AGE = 7 * 24 * 60 * 60;
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/** Time between pings automatically sent out for latency probing and keepalive */
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static constexpr auto PING_INTERVAL{2min};
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/** The maximum number of entries in a locator */
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static const unsigned int MAX_LOCATOR_SZ = 101;
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/** Number of blocks that can be requested at any given time from a single peer. */
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static const int MAX_BLOCKS_IN_TRANSIT_PER_PEER = 16;
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/** Default time during which a peer must stall block download progress before being disconnected.
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* the actual timeout is increased temporarily if peers are disconnected for hitting the timeout */
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static constexpr auto BLOCK_STALLING_TIMEOUT_DEFAULT{2s};
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/** Maximum timeout for stalling block download. */
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static constexpr auto BLOCK_STALLING_TIMEOUT_MAX{64s};
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/** Maximum depth of blocks we're willing to serve as compact blocks to peers
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* when requested. For older blocks, a regular BLOCK response will be sent. */
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static const int MAX_CMPCTBLOCK_DEPTH = 5;
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/** Maximum depth of blocks we're willing to respond to GETBLOCKTXN requests for. */
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static const int MAX_BLOCKTXN_DEPTH = 10;
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/** Size of the "block download window": how far ahead of our current height do we fetch?
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* Larger windows tolerate larger download speed differences between peer, but increase the potential
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* degree of disordering of blocks on disk (which make reindexing and pruning harder). We'll probably
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* want to make this a per-peer adaptive value at some point. */
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static const unsigned int BLOCK_DOWNLOAD_WINDOW = 1024;
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/** Block download timeout base, expressed in multiples of the block interval (i.e. 10 min) */
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static constexpr double BLOCK_DOWNLOAD_TIMEOUT_BASE = 1;
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/** Additional block download timeout per parallel downloading peer (i.e. 5 min) */
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static constexpr double BLOCK_DOWNLOAD_TIMEOUT_PER_PEER = 0.5;
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/** Maximum number of headers to announce when relaying blocks with headers message.*/
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static const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8;
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/** Maximum number of unconnecting headers announcements before DoS score */
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static const int MAX_UNCONNECTING_HEADERS = 10;
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/** Minimum blocks required to signal NODE_NETWORK_LIMITED */
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static const unsigned int NODE_NETWORK_LIMITED_MIN_BLOCKS = 288;
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/** Average delay between local address broadcasts */
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static constexpr auto AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL{24h};
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/** Average delay between peer address broadcasts */
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static constexpr auto AVG_ADDRESS_BROADCAST_INTERVAL{30s};
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/** Average delay between trickled inventory transmissions for inbound peers.
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* Blocks and peers with NetPermissionFlags::NoBan permission bypass this. */
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static constexpr auto INBOUND_INVENTORY_BROADCAST_INTERVAL{5s};
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/** Average delay between trickled inventory transmissions for outbound peers.
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* Use a smaller delay as there is less privacy concern for them.
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* Blocks and peers with NetPermissionFlags::NoBan permission bypass this.
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* Masternode outbound peers get half this delay. */
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static constexpr auto OUTBOUND_INVENTORY_BROADCAST_INTERVAL{2s};
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/** Maximum rate of inventory items to send per second.
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* Limits the impact of low-fee transaction floods.
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* We have 4 times smaller block times in Dash, so we need to push 4 times more invs per 1MB. */
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static constexpr unsigned int INVENTORY_BROADCAST_PER_SECOND = 7;
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/** Maximum number of inventory items to send per transmission. */
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static constexpr unsigned int INVENTORY_BROADCAST_MAX_PER_1MB_BLOCK = 4 * INVENTORY_BROADCAST_PER_SECOND * count_seconds(INBOUND_INVENTORY_BROADCAST_INTERVAL);
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/** The number of most recently announced transactions a peer can request. */
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static constexpr unsigned int INVENTORY_MAX_RECENT_RELAY = 3500;
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/** Verify that INVENTORY_MAX_RECENT_RELAY is enough to cache everything typically
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* relayed before unconditional relay from the mempool kicks in. This is only a
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* lower bound, and it should be larger to account for higher inv rate to outbound
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* peers, and random variations in the broadcast mechanism. */
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static_assert(INVENTORY_MAX_RECENT_RELAY >= INVENTORY_BROADCAST_PER_SECOND * UNCONDITIONAL_RELAY_DELAY / std::chrono::seconds{1}, "INVENTORY_RELAY_MAX too low");
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/** Maximum number of compact filters that may be requested with one getcfilters. See BIP 157. */
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static constexpr uint32_t MAX_GETCFILTERS_SIZE = 1000;
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/** Maximum number of cf hashes that may be requested with one getcfheaders. See BIP 157. */
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static constexpr uint32_t MAX_GETCFHEADERS_SIZE = 2000;
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/** the maximum percentage of addresses from our addrman to return in response to a getaddr message. */
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static constexpr size_t MAX_PCT_ADDR_TO_SEND = 23;
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/** The maximum number of address records permitted in an ADDR message. */
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static constexpr size_t MAX_ADDR_TO_SEND{1000};
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/** The maximum rate of address records we're willing to process on average. Can be bypassed using
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* the NetPermissionFlags::Addr permission. */
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static constexpr double MAX_ADDR_RATE_PER_SECOND{0.1};
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/** The soft limit of the address processing token bucket (the regular MAX_ADDR_RATE_PER_SECOND
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* based increments won't go above this, but the MAX_ADDR_TO_SEND increment following GETADDR
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* is exempt from this limit). */
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static constexpr size_t MAX_ADDR_PROCESSING_TOKEN_BUCKET{MAX_ADDR_TO_SEND};
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/** The compactblocks version we support. See BIP 152. */
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static constexpr uint64_t CMPCTBLOCKS_VERSION{1};
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// Internal stuff
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namespace {
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/** Blocks that are in flight, and that are in the queue to be downloaded. */
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struct QueuedBlock {
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/** BlockIndex. We must have this since we only request blocks when we've already validated the header. */
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const CBlockIndex* pindex;
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/** Optional, used for CMPCTBLOCK downloads */
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std::unique_ptr<PartiallyDownloadedBlock> partialBlock;
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};
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/**
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* Data structure for an individual peer. This struct is not protected by
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* cs_main since it does not contain validation-critical data.
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*
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* Memory is owned by shared pointers and this object is destructed when
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* the refcount drops to zero.
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*
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* Mutexes inside this struct must not be held when locking m_peer_mutex.
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*
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* TODO: move most members from CNodeState to this structure.
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* TODO: move remaining application-layer data members from CNode to this structure.
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*/
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struct Peer {
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/** Same id as the CNode object for this peer */
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const NodeId m_id{0};
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/** Services we offered to this peer.
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*
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* This is supplied by CConnman during peer initialization. It's const
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* because there is no protocol defined for renegotiating services
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* initially offered to a peer. The set of local services we offer should
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* not change after initialization.
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*
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* An interesting example of this is NODE_NETWORK and initial block
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* download: a node which starts up from scratch doesn't have any blocks
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* to serve, but still advertises NODE_NETWORK because it will eventually
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* fulfill this role after IBD completes. P2P code is written in such a
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* way that it can gracefully handle peers who don't make good on their
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* service advertisements. */
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const ServiceFlags m_our_services;
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/** Services this peer offered to us. */
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std::atomic<ServiceFlags> m_their_services{NODE_NONE};
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/** Protects misbehavior data members */
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Mutex m_misbehavior_mutex;
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/** Accumulated misbehavior score for this peer */
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int m_misbehavior_score GUARDED_BY(m_misbehavior_mutex){0};
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/** Whether this peer should be disconnected and marked as discouraged (unless it has NetPermissionFlags::NoBan permission). */
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bool m_should_discourage GUARDED_BY(m_misbehavior_mutex){false};
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/** Protects block inventory data members */
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Mutex m_block_inv_mutex;
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/** List of blocks that we'll anounce via an `inv` message.
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* There is no final sorting before sending, as they are always sent
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* immediately and in the order requested. */
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std::vector<uint256> m_blocks_for_inv_relay GUARDED_BY(m_block_inv_mutex);
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/** Unfiltered list of blocks that we'd like to announce via a `headers`
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* message. If we can't announce via a `headers` message, we'll fall back to
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* announcing via `inv`. */
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std::vector<uint256> m_blocks_for_headers_relay GUARDED_BY(m_block_inv_mutex);
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/** The final block hash that we sent in an `inv` message to this peer.
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* When the peer requests this block, we send an `inv` message to trigger
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* the peer to request the next sequence of block hashes.
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* Most peers use headers-first syncing, which doesn't use this mechanism */
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uint256 m_continuation_block GUARDED_BY(m_block_inv_mutex) {};
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/** This peer's reported block height when we connected */
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std::atomic<int> m_starting_height{-1};
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/** The pong reply we're expecting, or 0 if no pong expected. */
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std::atomic<uint64_t> m_ping_nonce_sent{0};
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/** When the last ping was sent, or 0 if no ping was ever sent */
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std::atomic<std::chrono::microseconds> m_ping_start{0us};
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/** Whether a ping has been requested by the user */
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std::atomic<bool> m_ping_queued{false};
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struct TxRelay {
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mutable RecursiveMutex m_bloom_filter_mutex;
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/** Whether the peer wishes to receive transaction announcements.
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*
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* This is initially set based on the fRelay flag in the received
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* `version` message. If initially set to false, it can only be flipped
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* to true if we have offered the peer NODE_BLOOM services and it sends
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* us a `filterload` or `filterclear` message. See BIP37. */
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bool m_relay_txs GUARDED_BY(m_bloom_filter_mutex){false};
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/** A bloom filter for which transactions to announce to the peer. See BIP37. */
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std::unique_ptr<CBloomFilter> m_bloom_filter PT_GUARDED_BY(m_bloom_filter_mutex) GUARDED_BY(m_bloom_filter_mutex){nullptr};
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mutable RecursiveMutex m_tx_inventory_mutex;
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/** A filter of all the txids that the peer has announced to
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* us or we have announced to the peer. We use this to avoid announcing
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* the same txid to a peer that already has the transaction. */
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CRollingBloomFilter m_tx_inventory_known_filter GUARDED_BY(m_tx_inventory_mutex){50000, 0.000001};
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/** Set of transaction ids we still have to announce. We use the
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* mempool to sort transactions in dependency order before relay, so
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* this does not have to be sorted. */
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std::set<uint256> m_tx_inventory_to_send GUARDED_BY(m_tx_inventory_mutex);
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/** List of non-tx/non-block inventory items */
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std::vector<CInv> vInventoryOtherToSend GUARDED_BY(m_tx_inventory_mutex);
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/** Whether the peer has requested us to send our complete mempool. Only
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* permitted if the peer has NetPermissionFlags::Mempool or we advertise
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* NODE_BLOOM. See BIP35. */
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bool m_send_mempool GUARDED_BY(m_tx_inventory_mutex){false};
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/** The last time a BIP35 `mempool` request was serviced. */
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std::atomic<std::chrono::seconds> m_last_mempool_req{0s};
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/** The next time after which we will send an `inv` message containing
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* transaction announcements to this peer. */
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std::chrono::microseconds m_next_inv_send_time GUARDED_BY(NetEventsInterface::g_msgproc_mutex){0};
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};
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/**
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* (Bitcoin) Initializes a TxRelay struct for this peer. Can be called at most once for a peer.
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* (Dash) Enables the flag that allows GetTxRelay() to return m_tx_relay */
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TxRelay* SetTxRelay()
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{
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Assume(!m_can_tx_relay);
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m_can_tx_relay = true;
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return WITH_LOCK(m_tx_relay_mutex, return m_tx_relay.get());
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};
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TxRelay* GetInvRelay()
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{
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return WITH_LOCK(m_tx_relay_mutex, return m_tx_relay.get());
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}
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TxRelay* GetTxRelay()
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{
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return m_can_tx_relay ? WITH_LOCK(m_tx_relay_mutex, return m_tx_relay.get()) : nullptr;
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};
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/** A vector of addresses to send to the peer, limited to MAX_ADDR_TO_SEND. */
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std::vector<CAddress> m_addrs_to_send GUARDED_BY(NetEventsInterface::g_msgproc_mutex);
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/** Probabilistic filter to track recent addr messages relayed with this
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* peer. Used to avoid relaying redundant addresses to this peer.
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*
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* We initialize this filter for outbound peers (other than
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* block-relay-only connections) or when an inbound peer sends us an
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* address related message (ADDR, ADDRV2, GETADDR).
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*
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* Presence of this filter must correlate with m_addr_relay_enabled.
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**/
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std::unique_ptr<CRollingBloomFilter> m_addr_known GUARDED_BY(NetEventsInterface::g_msgproc_mutex);
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/** Whether we are participating in address relay with this connection.
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*
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* We set this bool to true for outbound peers (other than
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* block-relay-only connections), or when an inbound peer sends us an
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* address related message (ADDR, ADDRV2, GETADDR).
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*
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* We use this bool to decide whether a peer is eligible for gossiping
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* addr messages. This avoids relaying to peers that are unlikely to
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* forward them, effectively blackholing self announcements. Reasons
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* peers might support addr relay on the link include that they connected
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* to us as a block-relay-only peer or they are a light client.
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*
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* This field must correlate with whether m_addr_known has been
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* initialized.*/
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std::atomic_bool m_addr_relay_enabled{false};
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/** Whether a peer can relay transactions */
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bool m_can_tx_relay{false};
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/** Whether a getaddr request to this peer is outstanding. */
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bool m_getaddr_sent GUARDED_BY(NetEventsInterface::g_msgproc_mutex){false};
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/** Guards address sending timers. */
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mutable Mutex m_addr_send_times_mutex;
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/** Time point to send the next ADDR message to this peer. */
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std::chrono::microseconds m_next_addr_send GUARDED_BY(m_addr_send_times_mutex){0};
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/** Time point to possibly re-announce our local address to this peer. */
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std::chrono::microseconds m_next_local_addr_send GUARDED_BY(m_addr_send_times_mutex){0};
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/** Whether the peer has signaled support for receiving ADDRv2 (BIP155)
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* messages, indicating a preference to receive ADDRv2 instead of ADDR ones. */
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std::atomic_bool m_wants_addrv2{false};
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/** Whether this peer has already sent us a getaddr message. */
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bool m_getaddr_recvd GUARDED_BY(NetEventsInterface::g_msgproc_mutex){false};
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/** Number of addresses that can be processed from this peer. Start at 1 to
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* permit self-announcement. */
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double m_addr_token_bucket GUARDED_BY(NetEventsInterface::g_msgproc_mutex){1.0};
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/** When m_addr_token_bucket was last updated */
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std::chrono::microseconds m_addr_token_timestamp GUARDED_BY(NetEventsInterface::g_msgproc_mutex){GetTime<std::chrono::microseconds>()};
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/** Total number of addresses that were dropped due to rate limiting. */
|
|
std::atomic<uint64_t> m_addr_rate_limited{0};
|
|
/** Total number of addresses that were processed (excludes rate-limited ones). */
|
|
std::atomic<uint64_t> m_addr_processed{0};
|
|
|
|
/** Set of txids to reconsider once their parent transactions have been accepted **/
|
|
std::set<uint256> m_orphan_work_set GUARDED_BY(g_cs_orphans);
|
|
|
|
/** Whether we've sent this peer a getheaders in response to an inv prior to initial-headers-sync completing */
|
|
bool m_inv_triggered_getheaders_before_sync GUARDED_BY(NetEventsInterface::g_msgproc_mutex){false};
|
|
|
|
/** Protects m_getdata_requests **/
|
|
Mutex m_getdata_requests_mutex;
|
|
/** Work queue of items requested by this peer **/
|
|
std::deque<CInv> m_getdata_requests GUARDED_BY(m_getdata_requests_mutex);
|
|
|
|
/** Time of the last getheaders message to this peer */
|
|
std::atomic<std::chrono::seconds> m_last_getheaders_timestamp GUARDED_BY(NetEventsInterface::g_msgproc_mutex){0s};
|
|
|
|
explicit Peer(NodeId id, ServiceFlags our_services)
|
|
: m_id(id)
|
|
, m_our_services{our_services}
|
|
{}
|
|
|
|
private:
|
|
Mutex m_tx_relay_mutex;
|
|
|
|
/** Transaction relay data.
|
|
* (Bitcoin) Transaction relay data. May be a nullptr.
|
|
* (Dash) Always initialized but selectively available through GetTxRelay()
|
|
* (non-transaction relay should use GetInvRelay(), which will provide
|
|
* unconditional access) */
|
|
std::unique_ptr<TxRelay> m_tx_relay GUARDED_BY(m_tx_relay_mutex){std::make_unique<TxRelay>()};
|
|
};
|
|
|
|
using PeerRef = std::shared_ptr<Peer>;
|
|
|
|
/**
|
|
* Maintain validation-specific state about nodes, protected by cs_main, instead
|
|
* by CNode's own locks. This simplifies asynchronous operation, where
|
|
* processing of incoming data is done after the ProcessMessage call returns,
|
|
* and we're no longer holding the node's locks.
|
|
*/
|
|
struct CNodeState {
|
|
//! The best known block we know this peer has announced.
|
|
const CBlockIndex* pindexBestKnownBlock{nullptr};
|
|
//! The hash of the last unknown block this peer has announced.
|
|
uint256 hashLastUnknownBlock{};
|
|
//! The last full block we both have.
|
|
const CBlockIndex* pindexLastCommonBlock{nullptr};
|
|
//! The best header we have sent our peer.
|
|
const CBlockIndex* pindexBestHeaderSent{nullptr};
|
|
//! Length of current-streak of unconnecting headers announcements
|
|
int nUnconnectingHeaders{0};
|
|
//! Whether we've started headers synchronization with this peer.
|
|
bool fSyncStarted{false};
|
|
//! When to potentially disconnect peer for stalling headers download
|
|
std::chrono::microseconds m_headers_sync_timeout{0us};
|
|
//! Since when we're stalling block download progress (in microseconds), or 0.
|
|
std::chrono::microseconds m_stalling_since{0us};
|
|
std::list<QueuedBlock> vBlocksInFlight;
|
|
//! When the first entry in vBlocksInFlight started downloading. Don't care when vBlocksInFlight is empty.
|
|
std::chrono::microseconds m_downloading_since{0us};
|
|
int nBlocksInFlight{0};
|
|
//! Whether we consider this a preferred download peer.
|
|
bool fPreferredDownload{false};
|
|
//! Whether this peer wants invs or headers (when possible) for block announcements.
|
|
bool fPreferHeaders{false};
|
|
//! Whether this peer wants invs or compressed headers (when possible) for block announcements.
|
|
bool fPreferHeadersCompressed{false};
|
|
/** Whether this peer wants invs or cmpctblocks (when possible) for block announcements. */
|
|
bool m_requested_hb_cmpctblocks{false};
|
|
/** Whether this peer will send us cmpctblocks if we request them. */
|
|
bool m_provides_cmpctblocks{false};
|
|
|
|
/** State used to enforce CHAIN_SYNC_TIMEOUT and EXTRA_PEER_CHECK_INTERVAL logic.
|
|
*
|
|
* Both are only in effect for outbound, non-manual, non-protected connections.
|
|
* Any peer protected (m_protect = true) is not chosen for eviction. A peer is
|
|
* marked as protected if all of these are true:
|
|
* - its connection type is IsBlockOnlyConn() == false
|
|
* - it gave us a valid connecting header
|
|
* - we haven't reached MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT yet
|
|
* - its chain tip has at least as much work as ours
|
|
*
|
|
* CHAIN_SYNC_TIMEOUT: if a peer's best known block has less work than our tip,
|
|
* set a timeout CHAIN_SYNC_TIMEOUT in the future:
|
|
* - If at timeout their best known block now has more work than our tip
|
|
* when the timeout was set, then either reset the timeout or clear it
|
|
* (after comparing against our current tip's work)
|
|
* - If at timeout their best known block still has less work than our
|
|
* tip did when the timeout was set, then send a getheaders message,
|
|
* and set a shorter timeout, HEADERS_RESPONSE_TIME seconds in future.
|
|
* If their best known block is still behind when that new timeout is
|
|
* reached, disconnect.
|
|
*
|
|
* EXTRA_PEER_CHECK_INTERVAL: after each interval, if we have too many outbound peers,
|
|
* drop the outbound one that least recently announced us a new block.
|
|
*/
|
|
struct ChainSyncTimeoutState {
|
|
//! A timeout used for checking whether our peer has sufficiently synced
|
|
std::chrono::seconds m_timeout{0s};
|
|
//! A header with the work we require on our peer's chain
|
|
const CBlockIndex* m_work_header{nullptr};
|
|
//! After timeout is reached, set to true after sending getheaders
|
|
bool m_sent_getheaders{false};
|
|
//! Whether this peer is protected from disconnection due to a bad/slow chain
|
|
bool m_protect{false};
|
|
};
|
|
|
|
ChainSyncTimeoutState m_chain_sync;
|
|
|
|
//! Time of last new block announcement
|
|
int64_t m_last_block_announcement{0};
|
|
|
|
/*
|
|
* State associated with objects download.
|
|
*
|
|
* Tx download algorithm:
|
|
*
|
|
* When inv comes in, queue up (process_time, inv) inside the peer's
|
|
* CNodeState (m_object_process_time) as long as m_object_announced for the peer
|
|
* isn't too big (MAX_PEER_OBJECT_ANNOUNCEMENTS).
|
|
*
|
|
* The process_time for a objects is set to nNow for outbound peers,
|
|
* nNow + 2 seconds for inbound peers. This is the time at which we'll
|
|
* consider trying to request the objects from the peer in
|
|
* SendMessages(). The delay for inbound peers is to allow outbound peers
|
|
* a chance to announce before we request from inbound peers, to prevent
|
|
* an adversary from using inbound connections to blind us to a
|
|
* objects (InvBlock).
|
|
*
|
|
* When we call SendMessages() for a given peer,
|
|
* we will loop over the objects in m_object_process_time, looking
|
|
* at the objects whose process_time <= nNow. We'll request each
|
|
* such objects that we don't have already and that hasn't been
|
|
* requested from another peer recently, up until we hit the
|
|
* MAX_PEER_OBJECT_IN_FLIGHT limit for the peer. Then we'll update
|
|
* g_already_asked_for for each requested inv, storing the time of the
|
|
* GETDATA request. We use g_already_asked_for to coordinate objects
|
|
* requests amongst our peers.
|
|
*
|
|
* For objects that we still need but we have already recently
|
|
* requested from some other peer, we'll reinsert (process_time, inv)
|
|
* back into the peer's m_object_process_time at the point in the future at
|
|
* which the most recent GETDATA request would time out (ie
|
|
* GetObjectInterval + the request time stored in g_already_asked_for).
|
|
* We add an additional delay for inbound peers, again to prefer
|
|
* attempting download from outbound peers first.
|
|
* We also add an extra small random delay up to 2 seconds
|
|
* to avoid biasing some peers over others. (e.g., due to fixed ordering
|
|
* of peer processing in ThreadMessageHandler).
|
|
*
|
|
* When we receive a objects from a peer, we remove the inv from the
|
|
* peer's m_object_in_flight set and from their recently announced set
|
|
* (m_object_announced). We also clear g_already_asked_for for that entry, so
|
|
* that if somehow the objects is not accepted but also not added to
|
|
* the reject filter, then we will eventually redownload from other
|
|
* peers.
|
|
*/
|
|
struct ObjectDownloadState {
|
|
/* Track when to attempt download of announced objects (process
|
|
* time in micros -> inv)
|
|
*/
|
|
std::multimap<std::chrono::microseconds, CInv> m_object_process_time;
|
|
|
|
//! Store all the objects a peer has recently announced
|
|
std::set<CInv> m_object_announced;
|
|
|
|
//! Store objects which were requested by us, with timestamp
|
|
std::map<CInv, std::chrono::microseconds> m_object_in_flight;
|
|
|
|
//! Periodically check for stuck getdata requests
|
|
std::chrono::microseconds m_check_expiry_timer{0};
|
|
};
|
|
|
|
ObjectDownloadState m_object_download;
|
|
|
|
//! Whether this peer is an inbound connection
|
|
const bool m_is_inbound;
|
|
|
|
//! A rolling bloom filter of all announced tx CInvs to this peer.
|
|
CRollingBloomFilter m_recently_announced_invs = CRollingBloomFilter{INVENTORY_MAX_RECENT_RELAY, 0.000001};
|
|
|
|
CNodeState(bool is_inbound) : m_is_inbound(is_inbound) {}
|
|
};
|
|
|
|
class PeerManagerImpl final : public PeerManager
|
|
{
|
|
public:
|
|
PeerManagerImpl(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman, BanMan* banman,
|
|
ChainstateManager& chainman, CTxMemPool& pool,
|
|
CMasternodeMetaMan& mn_metaman, CMasternodeSync& mn_sync,
|
|
CGovernanceManager& govman, CSporkManager& sporkman,
|
|
const CActiveMasternodeManager* const mn_activeman,
|
|
const std::unique_ptr<CDeterministicMNManager>& dmnman,
|
|
const std::unique_ptr<CJContext>& cj_ctx,
|
|
const std::unique_ptr<LLMQContext>& llmq_ctx,
|
|
bool ignore_incoming_txs);
|
|
|
|
/** Overridden from CValidationInterface. */
|
|
void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, !m_recent_confirmed_transactions_mutex);
|
|
void BlockDisconnected(const std::shared_ptr<const CBlock> &block, const CBlockIndex* pindex) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_recent_confirmed_transactions_mutex);
|
|
void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void BlockChecked(const CBlock& block, const BlockValidationState& state) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) override;
|
|
|
|
/** Implement NetEventsInterface */
|
|
void InitializeNode(CNode& node, ServiceFlags our_services) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void FinalizeNode(const CNode& node) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, !m_recent_confirmed_transactions_mutex, g_msgproc_mutex);
|
|
bool SendMessages(CNode* pto) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, !m_recent_confirmed_transactions_mutex, g_msgproc_mutex);
|
|
|
|
/** Implement PeerManager */
|
|
void StartScheduledTasks(CScheduler& scheduler) override;
|
|
void CheckForStaleTipAndEvictPeers() override;
|
|
std::optional<std::string> FetchBlock(NodeId peer_id, const CBlockIndex& block_index) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
bool GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats) const override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
bool IgnoresIncomingTxs() override { return m_ignore_incoming_txs; }
|
|
void SendPings() override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);;
|
|
void PushInventory(NodeId nodeid, const CInv& inv) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void RelayInv(CInv &inv, const int minProtoVersion) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void RelayInvFiltered(CInv &inv, const CTransaction &relatedTx, const int minProtoVersion) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void RelayInvFiltered(CInv &inv, const uint256 &relatedTxHash, const int minProtoVersion) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void RelayTransaction(const uint256& txid) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void SetBestHeight(int height) override { m_best_height = height; };
|
|
void Misbehaving(const NodeId pnode, const int howmuch, const std::string& message = "") override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void ProcessMessage(CNode& pfrom, const std::string& msg_type, CDataStream& vRecv,
|
|
const std::chrono::microseconds time_received, const std::atomic<bool>& interruptMsgProc) override
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, !m_recent_confirmed_transactions_mutex, g_msgproc_mutex);
|
|
void UpdateLastBlockAnnounceTime(NodeId node, int64_t time_in_seconds) override;
|
|
bool IsBanned(NodeId pnode) override EXCLUSIVE_LOCKS_REQUIRED(cs_main, !m_peer_mutex);
|
|
void EraseObjectRequest(NodeId nodeid, const CInv& inv) override EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
|
|
void RequestObject(NodeId nodeid, const CInv& inv, std::chrono::microseconds current_time,
|
|
bool is_masternode, bool fForce = false) override EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
|
|
size_t GetRequestedObjectCount(NodeId nodeid) const override EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
|
|
bool IsInvInFilter(NodeId nodeid, const uint256& hash) const override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
private:
|
|
/** Helpers to process result of external handlers of message */
|
|
void ProcessPeerMsgRet(const PeerMsgRet& ret, CNode& pfrom) EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
void PostProcessMessage(MessageProcessingResult&& ret, NodeId node) override EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
/** Consider evicting an outbound peer based on the amount of time they've been behind our tip */
|
|
void ConsiderEviction(CNode& pto, Peer& peer, std::chrono::seconds time_in_seconds) EXCLUSIVE_LOCKS_REQUIRED(cs_main, g_msgproc_mutex);
|
|
|
|
/** If we have extra outbound peers, try to disconnect the one with the oldest block announcement */
|
|
void EvictExtraOutboundPeers(std::chrono::seconds now) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
/** Retrieve unbroadcast transactions from the mempool and reattempt sending to peers */
|
|
void ReattemptInitialBroadcast(CScheduler& scheduler) EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
/** Get a shared pointer to the Peer object.
|
|
* May return an empty shared_ptr if the Peer object can't be found. */
|
|
PeerRef GetPeerRef(NodeId id) const EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
/** Get a shared pointer to the Peer object and remove it from m_peer_map.
|
|
* May return an empty shared_ptr if the Peer object can't be found. */
|
|
PeerRef RemovePeer(NodeId id) EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
/**
|
|
* Potentially mark a node discouraged based on the contents of a BlockValidationState object
|
|
*
|
|
* @param[in] via_compact_block this bool is passed in because net_processing should
|
|
* punish peers differently depending on whether the data was provided in a compact
|
|
* block message or not. If the compact block had a valid header, but contained invalid
|
|
* txs, the peer should not be punished. See BIP 152.
|
|
*
|
|
* @return Returns true if the peer was punished (probably disconnected)
|
|
*/
|
|
bool MaybePunishNodeForBlock(NodeId nodeid, const BlockValidationState& state,
|
|
bool via_compact_block, const std::string& message = "")
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
/**
|
|
* Potentially ban a node based on the contents of a TxValidationState object
|
|
*
|
|
* @return Returns true if the peer was punished (probably disconnected)
|
|
*
|
|
* Changes here may need to be reflected in TxRelayMayResultInDisconnect().
|
|
*/
|
|
bool MaybePunishNodeForTx(NodeId nodeid, const TxValidationState& state, const std::string& message = "")
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
/** Maybe disconnect a peer and discourage future connections from its address.
|
|
*
|
|
* @param[in] pnode The node to check.
|
|
* @param[in] peer The peer object to check.
|
|
* @return True if the peer was marked for disconnection in this function
|
|
*/
|
|
bool MaybeDiscourageAndDisconnect(CNode& pnode, Peer& peer);
|
|
|
|
void ProcessOrphanTx(std::set<uint256>& orphan_work_set) EXCLUSIVE_LOCKS_REQUIRED(cs_main, g_cs_orphans)
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
/** Process a single headers message from a peer. */
|
|
void ProcessHeadersMessage(CNode& pfrom, Peer& peer,
|
|
const std::vector<CBlockHeader>& headers,
|
|
bool via_compact_block)
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, g_msgproc_mutex);
|
|
/** Various helpers for headers processing, invoked by ProcessHeadersMessage() */
|
|
/** Deal with state tracking and headers sync for peers that send the
|
|
* occasional non-connecting header (this can happen due to BIP 130 headers
|
|
* announcements for blocks interacting with the 2hr (MAX_FUTURE_BLOCK_TIME) rule). */
|
|
void HandleFewUnconnectingHeaders(CNode& pfrom, Peer& peer, const std::vector<CBlockHeader>& headers)
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, g_msgproc_mutex);
|
|
/** Return true if the headers connect to each other, false otherwise */
|
|
bool CheckHeadersAreContinuous(const std::vector<CBlockHeader>& headers) const;
|
|
/** Request further headers from this peer with a given locator.
|
|
* We don't issue a getheaders message if we have a recent one outstanding.
|
|
* This returns true if a getheaders is actually sent, and false otherwise.
|
|
*/
|
|
bool MaybeSendGetHeaders(CNode& pfrom, const std::string& msg_type, const CBlockLocator& locator, Peer& peer)
|
|
EXCLUSIVE_LOCKS_REQUIRED(g_msgproc_mutex);
|
|
/** Potentially fetch blocks from this peer upon receipt of a new headers tip */
|
|
void HeadersDirectFetchBlocks(CNode& pfrom, const Peer& peer, const CBlockIndex* pindexLast);
|
|
/** Update peer state based on received headers message */
|
|
void UpdatePeerStateForReceivedHeaders(CNode& pfrom, const CBlockIndex *pindexLast, bool received_new_header, bool may_have_more_headers);
|
|
|
|
void SendBlockTransactions(CNode& pfrom, const CBlock& block, const BlockTransactionsRequest& req)
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex);
|
|
|
|
/** Send a version message to a peer */
|
|
void PushNodeVersion(CNode& pnode, const Peer& peer);
|
|
|
|
/** Send a ping message every PING_INTERVAL or if requested via RPC. May
|
|
* mark the peer to be disconnected if a ping has timed out.
|
|
* We use mockable time for ping timeouts, so setmocktime may cause pings
|
|
* to time out. */
|
|
void MaybeSendPing(CNode& node_to, Peer& peer, std::chrono::microseconds now);
|
|
|
|
/** Send `addr` messages on a regular schedule. */
|
|
void MaybeSendAddr(CNode& node, Peer& peer, std::chrono::microseconds current_time)
|
|
EXCLUSIVE_LOCKS_REQUIRED(g_msgproc_mutex);
|
|
|
|
/** Relay (gossip) an address to a few randomly chosen nodes.
|
|
*
|
|
* @param[in] originator The id of the peer that sent us the address. We don't want to relay it back.
|
|
* @param[in] addr Address to relay.
|
|
* @param[in] fReachable Whether the address' network is reachable. We relay unreachable
|
|
* addresses less.
|
|
*/
|
|
void RelayAddress(NodeId originator, const CAddress& addr, bool fReachable)
|
|
EXCLUSIVE_LOCKS_REQUIRED(!m_peer_mutex, g_msgproc_mutex);
|
|
|
|
const CChainParams& m_chainparams;
|
|
CConnman& m_connman;
|
|
AddrMan& m_addrman;
|
|
/** Pointer to this node's banman. May be nullptr - check existence before dereferencing. */
|
|
BanMan* const m_banman;
|
|
ChainstateManager& m_chainman;
|
|
CTxMemPool& m_mempool;
|
|
std::unique_ptr<TxReconciliationTracker> m_txreconciliation;
|
|
const std::unique_ptr<CDeterministicMNManager>& m_dmnman;
|
|
const std::unique_ptr<CJContext>& m_cj_ctx;
|
|
const std::unique_ptr<LLMQContext>& m_llmq_ctx;
|
|
CMasternodeMetaMan& m_mn_metaman;
|
|
CMasternodeSync& m_mn_sync;
|
|
CGovernanceManager& m_govman;
|
|
CSporkManager& m_sporkman;
|
|
const CActiveMasternodeManager* const m_mn_activeman;
|
|
|
|
/** The height of the best chain */
|
|
std::atomic<int> m_best_height{-1};
|
|
|
|
/** Next time to check for stale tip */
|
|
std::chrono::seconds m_stale_tip_check_time GUARDED_BY(cs_main){0s};
|
|
|
|
/** Whether this node is running in -blocksonly mode */
|
|
const bool m_ignore_incoming_txs;
|
|
|
|
bool RejectIncomingTxs(const CNode& peer) const;
|
|
|
|
/** Whether we've completed initial sync yet, for determining when to turn
|
|
* on extra block-relay-only peers. */
|
|
bool m_initial_sync_finished GUARDED_BY(cs_main){false};
|
|
|
|
/** Protects m_peer_map. This mutex must not be locked while holding a lock
|
|
* on any of the mutexes inside a Peer object. */
|
|
mutable Mutex m_peer_mutex;
|
|
/**
|
|
* Map of all Peer objects, keyed by peer id. This map is protected
|
|
* by the m_peer_mutex. Once a shared pointer reference is
|
|
* taken, the lock may be released. Individual fields are protected by
|
|
* their own locks.
|
|
*/
|
|
std::map<NodeId, PeerRef> m_peer_map GUARDED_BY(m_peer_mutex);
|
|
|
|
/** Map maintaining per-node state. */
|
|
std::map<NodeId, CNodeState> m_node_states GUARDED_BY(cs_main);
|
|
|
|
/** Get a pointer to a const CNodeState, used when not mutating the CNodeState object. */
|
|
const CNodeState* State(NodeId pnode) const EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
/** Get a pointer to a mutable CNodeState. */
|
|
CNodeState* State(NodeId pnode) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
std::atomic<std::chrono::microseconds> m_next_inv_to_inbounds{0us};
|
|
|
|
/** Check whether the last unknown block a peer advertised is not yet known. */
|
|
void ProcessBlockAvailability(NodeId nodeid) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
/** Update tracking information about which blocks a peer is assumed to have. */
|
|
void UpdateBlockAvailability(NodeId nodeid, const uint256& hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
bool CanDirectFetch() EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
/**
|
|
* To prevent fingerprinting attacks, only send blocks/headers outside of the
|
|
* active chain if they are no more than a month older (both in time, and in
|
|
* best equivalent proof of work) than the best header chain we know about and
|
|
* we fully-validated them at some point.
|
|
*/
|
|
bool BlockRequestAllowed(const CBlockIndex* pindex) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
bool AlreadyHaveBlock(const uint256& block_hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
void ProcessGetBlockData(CNode& pfrom, Peer& peer, const CInv& inv, llmq::CInstantSendManager& isman);
|
|
|
|
/**
|
|
* Validation logic for compact filters request handling.
|
|
*
|
|
* May disconnect from the peer in the case of a bad request.
|
|
*
|
|
* @param[in] node The node that we received the request from
|
|
* @param[in] peer The peer that we received the request from
|
|
* @param[in] filter_type The filter type the request is for. Must be basic filters.
|
|
* @param[in] start_height The start height for the request
|
|
* @param[in] stop_hash The stop_hash for the request
|
|
* @param[in] max_height_diff The maximum number of items permitted to request, as specified in BIP 157
|
|
* @param[out] stop_index The CBlockIndex for the stop_hash block, if the request can be serviced.
|
|
* @param[out] filter_index The filter index, if the request can be serviced.
|
|
* @return True if the request can be serviced.
|
|
*/
|
|
bool PrepareBlockFilterRequest(CNode& node, Peer& peer,
|
|
BlockFilterType filter_type, uint32_t start_height,
|
|
const uint256& stop_hash, uint32_t max_height_diff,
|
|
const CBlockIndex*& stop_index,
|
|
BlockFilterIndex*& filter_index);
|
|
|
|
/**
|
|
* Handle a cfilters request.
|
|
*
|
|
* May disconnect from the peer in the case of a bad request.
|
|
*
|
|
* @param[in] node The node that we received the request from
|
|
* @param[in] peer The peer that we received the request from
|
|
* @param[in] vRecv The raw message received
|
|
*/
|
|
void ProcessGetCFilters(CNode& node, Peer& peer, CDataStream& vRecv);
|
|
|
|
/**
|
|
* Handle a cfheaders request.
|
|
*
|
|
* May disconnect from the peer in the case of a bad request.
|
|
*
|
|
* @param[in] node The node that we received the request from
|
|
* @param[in] peer The peer that we received the request from
|
|
* @param[in] vRecv The raw message received
|
|
*/
|
|
void ProcessGetCFHeaders(CNode& node, Peer& peer, CDataStream& vRecv);
|
|
|
|
/**
|
|
* Handle a getcfcheckpt request.
|
|
*
|
|
* May disconnect from the peer in the case of a bad request.
|
|
*
|
|
* @param[in] node The node that we received the request from
|
|
* @param[in] peer The peer that we received the request from
|
|
* @param[in] vRecv The raw message received
|
|
*/
|
|
void ProcessGetCFCheckPt(CNode& node, Peer& peer, CDataStream& vRecv);
|
|
|
|
/** Checks if address relay is permitted with peer. If needed, initializes
|
|
* the m_addr_known bloom filter and sets m_addr_relay_enabled to true.
|
|
*
|
|
* @return True if address relay is enabled with peer
|
|
* False if address relay is disallowed
|
|
*/
|
|
bool SetupAddressRelay(const CNode& node, Peer& peer) EXCLUSIVE_LOCKS_REQUIRED(g_msgproc_mutex);
|
|
|
|
void AddAddressKnown(Peer& peer, const CAddress& addr) EXCLUSIVE_LOCKS_REQUIRED(g_msgproc_mutex);
|
|
void PushAddress(Peer& peer, const CAddress& addr, FastRandomContext& insecure_rand) EXCLUSIVE_LOCKS_REQUIRED(g_msgproc_mutex);
|
|
|
|
/** Number of nodes with fSyncStarted. */
|
|
int nSyncStarted GUARDED_BY(cs_main) = 0;
|
|
|
|
/** Hash of the last block we received via INV */
|
|
uint256 m_last_block_inv_triggering_headers_sync GUARDED_BY(g_msgproc_mutex){};
|
|
|
|
/**
|
|
* Sources of received blocks, saved to be able punish them when processing
|
|
* happens afterwards.
|
|
* Set mapBlockSource[hash].second to false if the node should not be
|
|
* punished if the block is invalid.
|
|
*/
|
|
std::map<uint256, std::pair<NodeId, bool>> mapBlockSource GUARDED_BY(cs_main);
|
|
|
|
/** Number of outbound peers with m_chain_sync.m_protect. */
|
|
int m_outbound_peers_with_protect_from_disconnect GUARDED_BY(cs_main) = 0;
|
|
|
|
/** Number of preferable block download peers. */
|
|
int m_num_preferred_download_peers GUARDED_BY(cs_main){0};
|
|
|
|
/** Stalling timeout for blocks in IBD */
|
|
std::atomic<std::chrono::seconds> m_block_stalling_timeout{BLOCK_STALLING_TIMEOUT_DEFAULT};
|
|
|
|
bool AlreadyHave(const CInv& inv)
|
|
EXCLUSIVE_LOCKS_REQUIRED(cs_main, !m_recent_confirmed_transactions_mutex);
|
|
|
|
/**
|
|
* Filter for transactions that were recently rejected by the mempool.
|
|
* These are not rerequested until the chain tip changes, at which point
|
|
* the entire filter is reset.
|
|
*
|
|
* Without this filter we'd be re-requesting txs from each of our peers,
|
|
* increasing bandwidth consumption considerably. For instance, with 100
|
|
* peers, half of which relay a tx we don't accept, that might be a 50x
|
|
* bandwidth increase. A flooding attacker attempting to roll-over the
|
|
* filter using minimum-sized, 60byte, transactions might manage to send
|
|
* 1000/sec if we have fast peers, so we pick 120,000 to give our peers a
|
|
* two minute window to send invs to us.
|
|
*
|
|
* Decreasing the false positive rate is fairly cheap, so we pick one in a
|
|
* million to make it highly unlikely for users to have issues with this
|
|
* filter.
|
|
*
|
|
* Memory used: 1.3 MB
|
|
*/
|
|
CRollingBloomFilter m_recent_rejects GUARDED_BY(::cs_main){120'000, 0.000'001};
|
|
uint256 hashRecentRejectsChainTip GUARDED_BY(cs_main);
|
|
|
|
/*
|
|
* Filter for transactions that have been recently confirmed.
|
|
* We use this to avoid requesting transactions that have already been
|
|
* confirnmed.
|
|
*
|
|
* Blocks don't typically have more than 4000 transactions, so this should
|
|
* be at least six blocks (~1 hr) worth of transactions that we can store,
|
|
* inserting both a txid and wtxid for every observed transaction.
|
|
* If the number of transactions appearing in a block goes up, or if we are
|
|
* seeing getdata requests more than an hour after initial announcement, we
|
|
* can increase this number.
|
|
* The false positive rate of 1/1M should come out to less than 1
|
|
* transaction per day that would be inadvertently ignored (which is the
|
|
* same probability that we have in the reject filter).
|
|
*/
|
|
Mutex m_recent_confirmed_transactions_mutex;
|
|
CRollingBloomFilter m_recent_confirmed_transactions GUARDED_BY(m_recent_confirmed_transactions_mutex){48'000, 0.000'001};
|
|
|
|
/**
|
|
* For sending `inv`s to inbound peers, we use a single (exponentially
|
|
* distributed) timer for all peers. If we used a separate timer for each
|
|
* peer, a spy node could make multiple inbound connections to us to
|
|
* accurately determine when we received the transaction (and potentially
|
|
* determine the transaction's origin). */
|
|
std::chrono::microseconds NextInvToInbounds(std::chrono::microseconds now,
|
|
std::chrono::seconds average_interval);
|
|
|
|
|
|
// All of the following cache a recent block, and are protected by m_most_recent_block_mutex
|
|
Mutex m_most_recent_block_mutex;
|
|
std::shared_ptr<const CBlock> m_most_recent_block GUARDED_BY(m_most_recent_block_mutex);
|
|
std::shared_ptr<const CBlockHeaderAndShortTxIDs> m_most_recent_compact_block GUARDED_BY(m_most_recent_block_mutex);
|
|
uint256 m_most_recent_block_hash GUARDED_BY(m_most_recent_block_mutex);
|
|
|
|
/** Height of the highest block announced using BIP 152 high-bandwidth mode. */
|
|
int m_highest_fast_announce GUARDED_BY(::cs_main){0};
|
|
|
|
/** Have we requested this block from a peer */
|
|
bool IsBlockRequested(const uint256& hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
/** Remove this block from our tracked requested blocks. Called if:
|
|
* - the block has been recieved from a peer
|
|
* - the request for the block has timed out
|
|
*/
|
|
void RemoveBlockRequest(const uint256& hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
/* Mark a block as in flight
|
|
* Returns false, still setting pit, if the block was already in flight from the same peer
|
|
* pit will only be valid as long as the same cs_main lock is being held
|
|
*/
|
|
bool BlockRequested(NodeId nodeid, const CBlockIndex& block, std::list<QueuedBlock>::iterator** pit = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
bool TipMayBeStale() EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
/** Update pindexLastCommonBlock and add not-in-flight missing successors to vBlocks, until it has
|
|
* at most count entries.
|
|
*/
|
|
void FindNextBlocksToDownload(const Peer& peer, unsigned int count, std::vector<const CBlockIndex*>& vBlocks, NodeId& nodeStaller) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
std::map<uint256, std::pair<NodeId, std::list<QueuedBlock>::iterator> > mapBlocksInFlight GUARDED_BY(cs_main);
|
|
|
|
/** When our tip was last updated. */
|
|
std::atomic<std::chrono::seconds> m_last_tip_update{0s};
|
|
|
|
/** Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed). */
|
|
CTransactionRef FindTxForGetData(const CNode* peer, const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds now) LOCKS_EXCLUDED(cs_main);
|
|
|
|
void ProcessGetData(CNode& pfrom, Peer& peer, const std::atomic<bool>& interruptMsgProc) EXCLUSIVE_LOCKS_REQUIRED(peer.m_getdata_requests_mutex) LOCKS_EXCLUDED(::cs_main);
|
|
|
|
/** Process a new block. Perform any post-processing housekeeping */
|
|
void ProcessBlock(CNode& from, const std::shared_ptr<const CBlock>& pblock, bool force_processing);
|
|
|
|
/** Relay map (txid -> CTransactionRef) */
|
|
typedef std::map<uint256, CTransactionRef> MapRelay;
|
|
MapRelay mapRelay GUARDED_BY(cs_main);
|
|
/** Expiration-time ordered list of (expire time, relay map entry) pairs. */
|
|
std::deque<std::pair<std::chrono::microseconds, MapRelay::iterator>> g_relay_expiration GUARDED_BY(cs_main);
|
|
|
|
/**
|
|
* When a peer sends us a valid block, instruct it to announce blocks to us
|
|
* using CMPCTBLOCK if possible by adding its nodeid to the end of
|
|
* lNodesAnnouncingHeaderAndIDs, and keeping that list under a certain size by
|
|
* removing the first element if necessary.
|
|
*/
|
|
void MaybeSetPeerAsAnnouncingHeaderAndIDs(NodeId nodeid) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
|
|
|
|
/** Stack of nodes which we have set to announce using compact blocks */
|
|
std::list<NodeId> lNodesAnnouncingHeaderAndIDs GUARDED_BY(cs_main);
|
|
|
|
/** Number of peers from which we're downloading blocks. */
|
|
int m_peers_downloading_from GUARDED_BY(cs_main) = 0;
|
|
|
|
/** Storage for orphan information */
|
|
TxOrphanage m_orphanage;
|
|
|
|
void AddToCompactExtraTransactions(const CTransactionRef& tx) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans);
|
|
|
|
/** Orphan/conflicted/etc transactions that are kept for compact block reconstruction.
|
|
* The last -blockreconstructionextratxn/DEFAULT_BLOCK_RECONSTRUCTION_EXTRA_TXN of
|
|
* these are kept in a ring buffer */
|
|
std::vector<std::pair<uint256, CTransactionRef>> vExtraTxnForCompact GUARDED_BY(g_cs_orphans);
|
|
/** Offset into vExtraTxnForCompact to insert the next tx */
|
|
size_t vExtraTxnForCompactIt GUARDED_BY(g_cs_orphans) = 0;
|
|
};
|
|
|
|
// Keeps track of the time (in microseconds) when transactions were requested last time
|
|
unordered_limitedmap<uint256, std::chrono::microseconds, StaticSaltedHasher> g_already_asked_for(MAX_INV_SZ, MAX_INV_SZ * 2);
|
|
unordered_limitedmap<uint256, std::chrono::microseconds, StaticSaltedHasher> g_erased_object_requests(MAX_INV_SZ, MAX_INV_SZ * 2);
|
|
|
|
const CNodeState* PeerManagerImpl::State(NodeId pnode) const EXCLUSIVE_LOCKS_REQUIRED(cs_main)
|
|
{
|
|
std::map<NodeId, CNodeState>::const_iterator it = m_node_states.find(pnode);
|
|
if (it == m_node_states.end())
|
|
return nullptr;
|
|
return &it->second;
|
|
}
|
|
|
|
CNodeState* PeerManagerImpl::State(NodeId pnode) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
|
|
{
|
|
return const_cast<CNodeState*>(std::as_const(*this).State(pnode));
|
|
}
|
|
|
|
/**
|
|
* Whether the peer supports the address. For example, a peer that does not
|
|
* implement BIP155 cannot receive Tor v3 addresses because it requires
|
|
* ADDRv2 (BIP155) encoding.
|
|
*/
|
|
static bool IsAddrCompatible(const Peer& peer, const CAddress& addr)
|
|
{
|
|
return peer.m_wants_addrv2 || addr.IsAddrV1Compatible();
|
|
}
|
|
|
|
void PeerManagerImpl::AddAddressKnown(Peer& peer, const CAddress& addr)
|
|
{
|
|
assert(peer.m_addr_known);
|
|
peer.m_addr_known->insert(addr.GetKey());
|
|
}
|
|
|
|
void PeerManagerImpl::PushAddress(Peer& peer, const CAddress& addr, FastRandomContext& insecure_rand)
|
|
{
|
|
// Known checking here is only to save space from duplicates.
|
|
// Before sending, we'll filter it again for known addresses that were
|
|
// added after addresses were pushed.
|
|
assert(peer.m_addr_known);
|
|
if (addr.IsValid() && !peer.m_addr_known->contains(addr.GetKey()) && IsAddrCompatible(peer, addr)) {
|
|
if (peer.m_addrs_to_send.size() >= MAX_ADDR_TO_SEND) {
|
|
peer.m_addrs_to_send[insecure_rand.randrange(peer.m_addrs_to_send.size())] = addr;
|
|
} else {
|
|
peer.m_addrs_to_send.push_back(addr);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void AddKnownInv(Peer& peer, const uint256& hash)
|
|
{
|
|
auto inv_relay = peer.GetInvRelay();
|
|
assert(inv_relay);
|
|
|
|
LOCK(inv_relay->m_tx_inventory_mutex);
|
|
inv_relay->m_tx_inventory_known_filter.insert(hash);
|
|
}
|
|
|
|
/** Whether this peer can serve us blocks. */
|
|
static bool CanServeBlocks(const Peer& peer)
|
|
{
|
|
return peer.m_their_services & (NODE_NETWORK|NODE_NETWORK_LIMITED);
|
|
}
|
|
|
|
/* Whether this peer supports compressed headers (DIP 25) */
|
|
static bool UsesCompressedHeaders(const Peer& peer)
|
|
{
|
|
return peer.m_their_services & NODE_HEADERS_COMPRESSED;
|
|
}
|
|
|
|
/** Whether this peer can only serve limited recent blocks (e.g. because
|
|
* it prunes old blocks) */
|
|
static bool IsLimitedPeer(const Peer& peer)
|
|
{
|
|
return (!(peer.m_their_services & NODE_NETWORK) &&
|
|
(peer.m_their_services & NODE_NETWORK_LIMITED));
|
|
}
|
|
|
|
/** Get maximum number of headers that can be included in one batch */
|
|
static uint16_t GetHeadersLimit(const CNode& pfrom, bool compressed)
|
|
{
|
|
if (pfrom.GetCommonVersion() >= INCREASE_MAX_HEADERS2_VERSION && compressed) {
|
|
return MAX_HEADERS_COMPRESSED_RESULT;
|
|
}
|
|
return MAX_HEADERS_UNCOMPRESSED_RESULT;
|
|
}
|
|
|
|
static void PushInv(Peer& peer, const CInv& inv)
|
|
{
|
|
auto inv_relay = peer.GetInvRelay();
|
|
assert(inv_relay);
|
|
|
|
ASSERT_IF_DEBUG(inv.type != MSG_BLOCK);
|
|
if (inv.type == MSG_BLOCK) {
|
|
LogPrintf("%s -- WARNING: using PushInv for BLOCK inv, peer=%d\n", __func__, peer.m_id);
|
|
return;
|
|
}
|
|
|
|
LOCK(inv_relay->m_tx_inventory_mutex);
|
|
if (inv_relay->m_tx_inventory_known_filter.contains(inv.hash)) {
|
|
LogPrint(BCLog::NET, "%s -- skipping known inv: %s peer=%d\n", __func__, inv.ToString(), peer.m_id);
|
|
return;
|
|
}
|
|
LogPrint(BCLog::NET, "%s -- adding new inv: %s peer=%d\n", __func__, inv.ToString(), peer.m_id);
|
|
if (inv.type == MSG_TX || inv.type == MSG_DSTX) {
|
|
inv_relay->m_tx_inventory_to_send.insert(inv.hash);
|
|
return;
|
|
}
|
|
inv_relay->vInventoryOtherToSend.push_back(inv);
|
|
}
|
|
|
|
std::chrono::microseconds PeerManagerImpl::NextInvToInbounds(std::chrono::microseconds now,
|
|
std::chrono::seconds average_interval)
|
|
{
|
|
if (m_next_inv_to_inbounds.load() < now) {
|
|
// If this function were called from multiple threads simultaneously
|
|
// it would possible that both update the next send variable, and return a different result to their caller.
|
|
// This is not possible in practice as only the net processing thread invokes this function.
|
|
m_next_inv_to_inbounds = GetExponentialRand(now, average_interval);
|
|
}
|
|
return m_next_inv_to_inbounds;
|
|
}
|
|
|
|
bool PeerManagerImpl::IsBlockRequested(const uint256& hash)
|
|
{
|
|
return mapBlocksInFlight.find(hash) != mapBlocksInFlight.end();
|
|
}
|
|
|
|
void PeerManagerImpl::RemoveBlockRequest(const uint256& hash)
|
|
{
|
|
auto it = mapBlocksInFlight.find(hash);
|
|
if (it == mapBlocksInFlight.end()) {
|
|
// Block was not requested
|
|
return;
|
|
}
|
|
|
|
auto [node_id, list_it] = it->second;
|
|
CNodeState *state = State(node_id);
|
|
assert(state != nullptr);
|
|
|
|
if (state->vBlocksInFlight.begin() == list_it) {
|
|
// First block on the queue was received, update the start download time for the next one
|
|
state->m_downloading_since = std::max(state->m_downloading_since, GetTime<std::chrono::microseconds>());
|
|
}
|
|
state->vBlocksInFlight.erase(list_it);
|
|
|
|
state->nBlocksInFlight--;
|
|
if (state->nBlocksInFlight == 0) {
|
|
// Last validated block on the queue was received.
|
|
m_peers_downloading_from--;
|
|
}
|
|
state->m_stalling_since = 0us;
|
|
mapBlocksInFlight.erase(it);
|
|
}
|
|
|
|
bool PeerManagerImpl::BlockRequested(NodeId nodeid, const CBlockIndex& block, std::list<QueuedBlock>::iterator **pit)
|
|
{
|
|
const uint256& hash{block.GetBlockHash()};
|
|
|
|
CNodeState *state = State(nodeid);
|
|
assert(state != nullptr);
|
|
|
|
// Short-circuit most stuff in case it is from the same node
|
|
std::map<uint256, std::pair<NodeId, std::list<QueuedBlock>::iterator> >::iterator itInFlight = mapBlocksInFlight.find(hash);
|
|
if (itInFlight != mapBlocksInFlight.end() && itInFlight->second.first == nodeid) {
|
|
if (pit) {
|
|
*pit = &itInFlight->second.second;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Make sure it's not listed somewhere already.
|
|
RemoveBlockRequest(hash);
|
|
|
|
std::list<QueuedBlock>::iterator it = state->vBlocksInFlight.insert(state->vBlocksInFlight.end(),
|
|
{&block, std::unique_ptr<PartiallyDownloadedBlock>(pit ? new PartiallyDownloadedBlock(&m_mempool) : nullptr)});
|
|
state->nBlocksInFlight++;
|
|
if (state->nBlocksInFlight == 1) {
|
|
// We're starting a block download (batch) from this peer.
|
|
state->m_downloading_since = GetTime<std::chrono::microseconds>();
|
|
m_peers_downloading_from++;
|
|
}
|
|
itInFlight = mapBlocksInFlight.insert(std::make_pair(hash, std::make_pair(nodeid, it))).first;
|
|
if (pit) {
|
|
*pit = &itInFlight->second.second;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void PeerManagerImpl::MaybeSetPeerAsAnnouncingHeaderAndIDs(NodeId nodeid)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
|
|
// When in -blocksonly mode, never request high-bandwidth mode from peers. Our
|
|
// mempool will not contain the transactions necessary to reconstruct the
|
|
// compact block.
|
|
if (m_ignore_incoming_txs) return;
|
|
|
|
CNodeState* nodestate = State(nodeid);
|
|
if (!nodestate || !nodestate->m_provides_cmpctblocks) {
|
|
// Don't request compact blocks if the peer has not signalled support
|
|
return;
|
|
}
|
|
|
|
int num_outbound_hb_peers = 0;
|
|
for (std::list<NodeId>::iterator it = lNodesAnnouncingHeaderAndIDs.begin(); it != lNodesAnnouncingHeaderAndIDs.end(); it++) {
|
|
if (*it == nodeid) {
|
|
lNodesAnnouncingHeaderAndIDs.erase(it);
|
|
lNodesAnnouncingHeaderAndIDs.push_back(nodeid);
|
|
return;
|
|
}
|
|
CNodeState *state = State(*it);
|
|
if (state != nullptr && !state->m_is_inbound) ++num_outbound_hb_peers;
|
|
}
|
|
if (nodestate->m_is_inbound) {
|
|
// If we're adding an inbound HB peer, make sure we're not removing
|
|
// our last outbound HB peer in the process.
|
|
if (lNodesAnnouncingHeaderAndIDs.size() >= 3 && num_outbound_hb_peers == 1) {
|
|
CNodeState *remove_node = State(lNodesAnnouncingHeaderAndIDs.front());
|
|
if (remove_node != nullptr && !remove_node->m_is_inbound) {
|
|
// Put the HB outbound peer in the second slot, so that it
|
|
// doesn't get removed.
|
|
std::swap(lNodesAnnouncingHeaderAndIDs.front(), *std::next(lNodesAnnouncingHeaderAndIDs.begin()));
|
|
}
|
|
}
|
|
}
|
|
m_connman.ForNode(nodeid, [this](CNode* pfrom) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
|
|
AssertLockHeld(::cs_main);
|
|
if (lNodesAnnouncingHeaderAndIDs.size() >= 3) {
|
|
// As per BIP152, we only get 3 of our peers to announce
|
|
// blocks using compact encodings.
|
|
m_connman.ForNode(lNodesAnnouncingHeaderAndIDs.front(), [this](CNode* pnodeStop){
|
|
m_connman.PushMessage(pnodeStop, CNetMsgMaker(pnodeStop->GetCommonVersion()).Make(NetMsgType::SENDCMPCT, /*high_bandwidth=*/false, /*version=*/CMPCTBLOCKS_VERSION));
|
|
// save BIP152 bandwidth state: we select peer to be low-bandwidth
|
|
pnodeStop->m_bip152_highbandwidth_to = false;
|
|
return true;
|
|
});
|
|
lNodesAnnouncingHeaderAndIDs.pop_front();
|
|
}
|
|
m_connman.PushMessage(pfrom, CNetMsgMaker(pfrom->GetCommonVersion()).Make(NetMsgType::SENDCMPCT, /*high_bandwidth=*/true, /*version=*/CMPCTBLOCKS_VERSION));
|
|
// save BIP152 bandwidth state: we select peer to be high-bandwidth
|
|
pfrom->m_bip152_highbandwidth_to = true;
|
|
lNodesAnnouncingHeaderAndIDs.push_back(pfrom->GetId());
|
|
return true;
|
|
});
|
|
}
|
|
|
|
bool PeerManagerImpl::TipMayBeStale()
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
const Consensus::Params& consensusParams = m_chainparams.GetConsensus();
|
|
if (m_last_tip_update.load() == 0s) {
|
|
m_last_tip_update = GetTime<std::chrono::seconds>();
|
|
}
|
|
return m_last_tip_update.load() < GetTime<std::chrono::seconds>() - std::chrono::seconds{consensusParams.nPowTargetSpacing * 3} && mapBlocksInFlight.empty();
|
|
}
|
|
|
|
bool PeerManagerImpl::CanDirectFetch()
|
|
{
|
|
return m_chainman.ActiveChain().Tip()->GetBlockTime() > GetAdjustedTime() - m_chainparams.GetConsensus().nPowTargetSpacing * 20;
|
|
}
|
|
|
|
static bool PeerHasHeader(CNodeState *state, const CBlockIndex *pindex) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
|
|
{
|
|
if (state->pindexBestKnownBlock && pindex == state->pindexBestKnownBlock->GetAncestor(pindex->nHeight))
|
|
return true;
|
|
if (state->pindexBestHeaderSent && pindex == state->pindexBestHeaderSent->GetAncestor(pindex->nHeight))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessBlockAvailability(NodeId nodeid)
|
|
{
|
|
CNodeState *state = State(nodeid);
|
|
assert(state != nullptr);
|
|
|
|
if (!state->hashLastUnknownBlock.IsNull()) {
|
|
const CBlockIndex* pindex = m_chainman.m_blockman.LookupBlockIndex(state->hashLastUnknownBlock);
|
|
if (pindex && pindex->nChainWork > 0) {
|
|
if (state->pindexBestKnownBlock == nullptr || pindex->nChainWork >= state->pindexBestKnownBlock->nChainWork) {
|
|
state->pindexBestKnownBlock = pindex;
|
|
}
|
|
state->hashLastUnknownBlock.SetNull();
|
|
}
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::UpdateBlockAvailability(NodeId nodeid, const uint256 &hash)
|
|
{
|
|
CNodeState *state = State(nodeid);
|
|
assert(state != nullptr);
|
|
|
|
ProcessBlockAvailability(nodeid);
|
|
|
|
const CBlockIndex* pindex = m_chainman.m_blockman.LookupBlockIndex(hash);
|
|
if (pindex && pindex->nChainWork > 0) {
|
|
// An actually better block was announced.
|
|
if (state->pindexBestKnownBlock == nullptr || pindex->nChainWork >= state->pindexBestKnownBlock->nChainWork) {
|
|
state->pindexBestKnownBlock = pindex;
|
|
}
|
|
} else {
|
|
// An unknown block was announced; just assume that the latest one is the best one.
|
|
state->hashLastUnknownBlock = hash;
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::FindNextBlocksToDownload(const Peer& peer, unsigned int count, std::vector<const CBlockIndex*>& vBlocks, NodeId& nodeStaller)
|
|
{
|
|
if (count == 0)
|
|
return;
|
|
|
|
vBlocks.reserve(vBlocks.size() + count);
|
|
CNodeState *state = State(peer.m_id);
|
|
assert(state != nullptr);
|
|
|
|
// Make sure pindexBestKnownBlock is up to date, we'll need it.
|
|
ProcessBlockAvailability(peer.m_id);
|
|
|
|
if (state->pindexBestKnownBlock == nullptr || state->pindexBestKnownBlock->nChainWork < m_chainman.ActiveChain().Tip()->nChainWork || state->pindexBestKnownBlock->nChainWork < nMinimumChainWork) {
|
|
// This peer has nothing interesting.
|
|
return;
|
|
}
|
|
|
|
if (state->pindexLastCommonBlock == nullptr) {
|
|
// Bootstrap quickly by guessing a parent of our best tip is the forking point.
|
|
// Guessing wrong in either direction is not a problem.
|
|
state->pindexLastCommonBlock = m_chainman.ActiveChain()[std::min(state->pindexBestKnownBlock->nHeight, m_chainman.ActiveChain().Height())];
|
|
}
|
|
|
|
// If the peer reorganized, our previous pindexLastCommonBlock may not be an ancestor
|
|
// of its current tip anymore. Go back enough to fix that.
|
|
state->pindexLastCommonBlock = LastCommonAncestor(state->pindexLastCommonBlock, state->pindexBestKnownBlock);
|
|
if (state->pindexLastCommonBlock == state->pindexBestKnownBlock)
|
|
return;
|
|
|
|
std::vector<const CBlockIndex*> vToFetch;
|
|
const CBlockIndex *pindexWalk = state->pindexLastCommonBlock;
|
|
// Never fetch further than the best block we know the peer has, or more than BLOCK_DOWNLOAD_WINDOW + 1 beyond the last
|
|
// linked block we have in common with this peer. The +1 is so we can detect stalling, namely if we would be able to
|
|
// download that next block if the window were 1 larger.
|
|
int nWindowEnd = state->pindexLastCommonBlock->nHeight + BLOCK_DOWNLOAD_WINDOW;
|
|
int nMaxHeight = std::min<int>(state->pindexBestKnownBlock->nHeight, nWindowEnd + 1);
|
|
NodeId waitingfor = -1;
|
|
while (pindexWalk->nHeight < nMaxHeight) {
|
|
// Read up to 128 (or more, if more blocks than that are needed) successors of pindexWalk (towards
|
|
// pindexBestKnownBlock) into vToFetch. We fetch 128, because CBlockIndex::GetAncestor may be as expensive
|
|
// as iterating over ~100 CBlockIndex* entries anyway.
|
|
int nToFetch = std::min(nMaxHeight - pindexWalk->nHeight, std::max<int>(count - vBlocks.size(), 128));
|
|
vToFetch.resize(nToFetch);
|
|
pindexWalk = state->pindexBestKnownBlock->GetAncestor(pindexWalk->nHeight + nToFetch);
|
|
vToFetch[nToFetch - 1] = pindexWalk;
|
|
for (unsigned int i = nToFetch - 1; i > 0; i--) {
|
|
vToFetch[i - 1] = vToFetch[i]->pprev;
|
|
}
|
|
|
|
// Iterate over those blocks in vToFetch (in forward direction), adding the ones that
|
|
// are not yet downloaded and not in flight to vBlocks. In the meantime, update
|
|
// pindexLastCommonBlock as long as all ancestors are already downloaded, or if it's
|
|
// already part of our chain (and therefore don't need it even if pruned).
|
|
for (const CBlockIndex* pindex : vToFetch) {
|
|
if (!pindex->IsValid(BLOCK_VALID_TREE)) {
|
|
// We consider the chain that this peer is on invalid.
|
|
return;
|
|
}
|
|
if (pindex->nStatus & BLOCK_HAVE_DATA || m_chainman.ActiveChain().Contains(pindex)) {
|
|
if (pindex->HaveTxsDownloaded())
|
|
state->pindexLastCommonBlock = pindex;
|
|
} else if (!IsBlockRequested(pindex->GetBlockHash())) {
|
|
// The block is not already downloaded, and not yet in flight.
|
|
if (pindex->nHeight > nWindowEnd) {
|
|
// We reached the end of the window.
|
|
if (vBlocks.size() == 0 && waitingfor != peer.m_id) {
|
|
// We aren't able to fetch anything, but we would be if the download window was one larger.
|
|
nodeStaller = waitingfor;
|
|
}
|
|
return;
|
|
}
|
|
vBlocks.push_back(pindex);
|
|
if (vBlocks.size() == count) {
|
|
return;
|
|
}
|
|
} else if (waitingfor == -1) {
|
|
// This is the first already-in-flight block.
|
|
waitingfor = mapBlocksInFlight[pindex->GetBlockHash()].first;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} // namespace
|
|
|
|
void PeerManagerImpl::PushNodeVersion(CNode& pnode, const Peer& peer)
|
|
{
|
|
const auto& params = Params();
|
|
|
|
uint64_t my_services{peer.m_our_services};
|
|
const int64_t nTime{count_seconds(GetTime<std::chrono::seconds>())};
|
|
uint64_t nonce = pnode.GetLocalNonce();
|
|
const int nNodeStartingHeight{m_best_height};
|
|
NodeId nodeid = pnode.GetId();
|
|
CAddress addr = pnode.addr;
|
|
|
|
CService addr_you = addr.IsRoutable() && !IsProxy(addr) && addr.IsAddrV1Compatible() ? addr : CService();
|
|
uint64_t your_services{addr.nServices};
|
|
|
|
uint256 mnauthChallenge;
|
|
GetRandBytes({mnauthChallenge.begin(), mnauthChallenge.size()});
|
|
pnode.SetSentMNAuthChallenge(mnauthChallenge);
|
|
|
|
int nProtocolVersion = PROTOCOL_VERSION;
|
|
if (params.NetworkIDString() != CBaseChainParams::MAIN && gArgs.IsArgSet("-pushversion")) {
|
|
nProtocolVersion = gArgs.GetArg("-pushversion", PROTOCOL_VERSION);
|
|
}
|
|
|
|
const bool tx_relay = !m_ignore_incoming_txs && !pnode.IsBlockOnlyConn() && !pnode.IsFeelerConn();
|
|
m_connman.PushMessage(&pnode, CNetMsgMaker(INIT_PROTO_VERSION).Make(NetMsgType::VERSION, nProtocolVersion, my_services, nTime,
|
|
your_services, addr_you, // Together the pre-version-31402 serialization of CAddress "addrYou" (without nTime)
|
|
my_services, CService(), // Together the pre-version-31402 serialization of CAddress "addrMe" (without nTime)
|
|
nonce, strSubVersion, nNodeStartingHeight, tx_relay, mnauthChallenge, pnode.m_masternode_connection.load()));
|
|
|
|
if (fLogIPs) {
|
|
LogPrint(BCLog::NET, "send version message: version %d, blocks=%d, them=%s, txrelay=%d, peer=%d\n", nProtocolVersion, nNodeStartingHeight, addr_you.ToStringAddrPort(), tx_relay, nodeid);
|
|
} else {
|
|
LogPrint(BCLog::NET, "send version message: version %d, blocks=%d, txrelay=%d, peer=%d\n", nProtocolVersion, nNodeStartingHeight, tx_relay, nodeid);
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::EraseObjectRequest(NodeId nodeid, const CInv& inv)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
|
|
CNodeState* state = State(nodeid);
|
|
if (state == nullptr)
|
|
return;
|
|
|
|
LogPrint(BCLog::NET, "%s -- inv=(%s)\n", __func__, inv.ToString());
|
|
g_already_asked_for.erase(inv.hash);
|
|
g_erased_object_requests.insert(std::make_pair(inv.hash, GetTime<std::chrono::microseconds>()));
|
|
|
|
state->m_object_download.m_object_announced.erase(inv);
|
|
state->m_object_download.m_object_in_flight.erase(inv);
|
|
}
|
|
|
|
std::chrono::microseconds GetObjectRequestTime(const CInv& inv) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
auto it = g_already_asked_for.find(inv.hash);
|
|
if (it != g_already_asked_for.end()) {
|
|
return it->second;
|
|
}
|
|
return {};
|
|
}
|
|
|
|
void UpdateObjectRequestTime(const CInv& inv, std::chrono::microseconds request_time) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
auto it = g_already_asked_for.find(inv.hash);
|
|
if (it == g_already_asked_for.end()) {
|
|
g_already_asked_for.insert(std::make_pair(inv.hash, request_time));
|
|
} else {
|
|
g_already_asked_for.update(it, request_time);
|
|
}
|
|
}
|
|
|
|
std::chrono::microseconds GetObjectInterval(int invType)
|
|
{
|
|
// some messages need to be re-requested faster when the first announcing peer did not answer to GETDATA
|
|
switch(invType)
|
|
{
|
|
case MSG_QUORUM_RECOVERED_SIG:
|
|
return 15s;
|
|
case MSG_CLSIG:
|
|
return 5s;
|
|
case MSG_ISDLOCK:
|
|
return 10s;
|
|
default:
|
|
return GETDATA_TX_INTERVAL;
|
|
}
|
|
}
|
|
|
|
std::chrono::microseconds GetObjectExpiryInterval(int invType)
|
|
{
|
|
return GetObjectInterval(invType) * TX_EXPIRY_INTERVAL_FACTOR;
|
|
}
|
|
|
|
std::chrono::microseconds GetObjectRandomDelay(int invType)
|
|
{
|
|
if (invType == MSG_TX) {
|
|
return GetRandMicros(MAX_GETDATA_RANDOM_DELAY);
|
|
}
|
|
return {};
|
|
}
|
|
|
|
std::chrono::microseconds CalculateObjectGetDataTime(const CInv& inv, std::chrono::microseconds current_time, bool is_masternode, bool use_inbound_delay) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
std::chrono::microseconds process_time;
|
|
const auto last_request_time = GetObjectRequestTime(inv);
|
|
// First time requesting this tx
|
|
if (last_request_time.count() == 0) {
|
|
process_time = current_time;
|
|
} else {
|
|
// Randomize the delay to avoid biasing some peers over others (such as due to
|
|
// fixed ordering of peer processing in ThreadMessageHandler)
|
|
process_time = last_request_time + GetObjectInterval(inv.type) + GetObjectRandomDelay(inv.type);
|
|
}
|
|
|
|
// We delay processing announcements from inbound peers
|
|
if (inv.IsMsgTx() && !is_masternode && use_inbound_delay) process_time += INBOUND_PEER_TX_DELAY;
|
|
|
|
return process_time;
|
|
}
|
|
|
|
void PeerManagerImpl::RequestObject(NodeId nodeid, const CInv& inv, std::chrono::microseconds current_time,
|
|
bool is_masternode, bool fForce)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
|
|
CNodeState* state = State(nodeid);
|
|
if (state == nullptr)
|
|
return;
|
|
|
|
CNodeState::ObjectDownloadState& peer_download_state = state->m_object_download;
|
|
if (peer_download_state.m_object_announced.size() >= MAX_PEER_OBJECT_ANNOUNCEMENTS ||
|
|
peer_download_state.m_object_process_time.size() >= MAX_PEER_OBJECT_ANNOUNCEMENTS ||
|
|
peer_download_state.m_object_announced.count(inv)) {
|
|
// Too many queued announcements from this peer, or we already have
|
|
// this announcement
|
|
return;
|
|
}
|
|
peer_download_state.m_object_announced.insert(inv);
|
|
|
|
// Calculate the time to try requesting this transaction. Use
|
|
// fPreferredDownload as a proxy for outbound peers.
|
|
std::chrono::microseconds process_time = CalculateObjectGetDataTime(inv, current_time, is_masternode, !state->fPreferredDownload);
|
|
|
|
peer_download_state.m_object_process_time.emplace(process_time, inv);
|
|
|
|
if (fForce) {
|
|
// make sure this object is actually requested ASAP
|
|
g_erased_object_requests.erase(inv.hash);
|
|
g_already_asked_for.erase(inv.hash);
|
|
}
|
|
|
|
LogPrint(BCLog::NET, "%s -- inv=(%s), current_time=%d, process_time=%d, delta=%d\n", __func__, inv.ToString(), current_time.count(), process_time.count(), (process_time - current_time).count());
|
|
}
|
|
|
|
size_t PeerManagerImpl::GetRequestedObjectCount(NodeId nodeid) const
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
|
|
const CNodeState* state = State(nodeid);
|
|
if (state == nullptr)
|
|
return 0;
|
|
|
|
return state->m_object_download.m_object_process_time.size();
|
|
}
|
|
|
|
void PeerManagerImpl::UpdateLastBlockAnnounceTime(NodeId node, int64_t time_in_seconds)
|
|
{
|
|
LOCK(cs_main);
|
|
CNodeState *state = State(node);
|
|
if (state) state->m_last_block_announcement = time_in_seconds;
|
|
}
|
|
|
|
void PeerManagerImpl::InitializeNode(CNode& node, ServiceFlags our_services) {
|
|
NodeId nodeid = node.GetId();
|
|
{
|
|
LOCK(cs_main);
|
|
m_node_states.emplace_hint(m_node_states.end(), std::piecewise_construct, std::forward_as_tuple(nodeid), std::forward_as_tuple(node.IsInboundConn()));
|
|
}
|
|
PeerRef peer = std::make_shared<Peer>(nodeid, our_services);
|
|
{
|
|
LOCK(m_peer_mutex);
|
|
m_peer_map.emplace_hint(m_peer_map.end(), nodeid, peer);
|
|
}
|
|
if (!node.IsInboundConn()) {
|
|
PushNodeVersion(node, *peer);
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::ReattemptInitialBroadcast(CScheduler& scheduler)
|
|
{
|
|
std::set<uint256> unbroadcast_txids = m_mempool.GetUnbroadcastTxs();
|
|
|
|
for (const uint256& txid : unbroadcast_txids) {
|
|
CTransactionRef tx = m_mempool.get(txid);
|
|
|
|
if (tx != nullptr) {
|
|
RelayTransaction(txid);
|
|
} else {
|
|
m_mempool.RemoveUnbroadcastTx(txid, true);
|
|
}
|
|
}
|
|
|
|
// Schedule next run for 10-15 minutes in the future.
|
|
// We add randomness on every cycle to avoid the possibility of P2P fingerprinting.
|
|
const std::chrono::milliseconds delta = 10min + GetRandMillis(5min);
|
|
scheduler.scheduleFromNow([&] { ReattemptInitialBroadcast(scheduler); }, delta);
|
|
}
|
|
|
|
void PeerManagerImpl::FinalizeNode(const CNode& node) {
|
|
NodeId nodeid = node.GetId();
|
|
int misbehavior{0};
|
|
LOCK(cs_main);
|
|
{
|
|
{
|
|
// We remove the PeerRef from g_peer_map here, but we don't always
|
|
// destruct the Peer. Sometimes another thread is still holding a
|
|
// PeerRef, so the refcount is >= 1. Be careful not to do any
|
|
// processing here that assumes Peer won't be changed before it's
|
|
// destructed.
|
|
PeerRef peer = RemovePeer(nodeid);
|
|
assert(peer != nullptr);
|
|
misbehavior = WITH_LOCK(peer->m_misbehavior_mutex, return peer->m_misbehavior_score);
|
|
}
|
|
CNodeState *state = State(nodeid);
|
|
assert(state != nullptr);
|
|
|
|
if (state->fSyncStarted)
|
|
nSyncStarted--;
|
|
|
|
for (const QueuedBlock& entry : state->vBlocksInFlight) {
|
|
mapBlocksInFlight.erase(entry.pindex->GetBlockHash());
|
|
}
|
|
WITH_LOCK(g_cs_orphans, m_orphanage.EraseForPeer(nodeid));
|
|
if (m_txreconciliation) m_txreconciliation->ForgetPeer(nodeid);
|
|
m_num_preferred_download_peers -= state->fPreferredDownload;
|
|
m_peers_downloading_from -= (state->nBlocksInFlight != 0);
|
|
assert(m_peers_downloading_from >= 0);
|
|
m_outbound_peers_with_protect_from_disconnect -= state->m_chain_sync.m_protect;
|
|
assert(m_outbound_peers_with_protect_from_disconnect >= 0);
|
|
|
|
m_node_states.erase(nodeid);
|
|
|
|
if (m_node_states.empty()) {
|
|
// Do a consistency check after the last peer is removed.
|
|
assert(mapBlocksInFlight.empty());
|
|
assert(m_num_preferred_download_peers == 0);
|
|
assert(m_peers_downloading_from == 0);
|
|
assert(m_outbound_peers_with_protect_from_disconnect == 0);
|
|
assert(m_orphanage.Size() == 0);
|
|
}
|
|
} // cs_main
|
|
|
|
if (node.fSuccessfullyConnected && misbehavior == 0 && !node.IsBlockOnlyConn() && !node.IsInboundConn()) {
|
|
// Only change visible addrman state for full outbound peers. We don't
|
|
// call Connected() for feeler connections since they don't have
|
|
// fSuccessfullyConnected set.
|
|
m_addrman.Connected(node.addr);
|
|
}
|
|
|
|
LogPrint(BCLog::NET, "Cleared nodestate for peer=%d\n", nodeid);
|
|
}
|
|
|
|
PeerRef PeerManagerImpl::GetPeerRef(NodeId id) const
|
|
{
|
|
LOCK(m_peer_mutex);
|
|
auto it = m_peer_map.find(id);
|
|
return it != m_peer_map.end() ? it->second : nullptr;
|
|
}
|
|
|
|
PeerRef PeerManagerImpl::RemovePeer(NodeId id)
|
|
{
|
|
PeerRef ret;
|
|
LOCK(m_peer_mutex);
|
|
auto it = m_peer_map.find(id);
|
|
if (it != m_peer_map.end()) {
|
|
ret = std::move(it->second);
|
|
m_peer_map.erase(it);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
bool PeerManagerImpl::GetNodeStateStats(NodeId nodeid, CNodeStateStats& stats) const
|
|
{
|
|
{
|
|
LOCK(cs_main);
|
|
const CNodeState* state = State(nodeid);
|
|
if (state == nullptr)
|
|
return false;
|
|
stats.nSyncHeight = state->pindexBestKnownBlock ? state->pindexBestKnownBlock->nHeight : -1;
|
|
stats.nCommonHeight = state->pindexLastCommonBlock ? state->pindexLastCommonBlock->nHeight : -1;
|
|
for (const QueuedBlock& queue : state->vBlocksInFlight) {
|
|
if (queue.pindex)
|
|
stats.vHeightInFlight.push_back(queue.pindex->nHeight);
|
|
}
|
|
}
|
|
|
|
PeerRef peer = GetPeerRef(nodeid);
|
|
if (peer == nullptr) return false;
|
|
stats.m_misbehavior_score = WITH_LOCK(peer->m_misbehavior_mutex, return peer->m_misbehavior_score);
|
|
stats.their_services = peer->m_their_services;
|
|
stats.m_starting_height = peer->m_starting_height;
|
|
// It is common for nodes with good ping times to suddenly become lagged,
|
|
// due to a new block arriving or other large transfer.
|
|
// Merely reporting pingtime might fool the caller into thinking the node was still responsive,
|
|
// since pingtime does not update until the ping is complete, which might take a while.
|
|
// So, if a ping is taking an unusually long time in flight,
|
|
// the caller can immediately detect that this is happening.
|
|
auto ping_wait{0us};
|
|
if ((0 != peer->m_ping_nonce_sent) && (0 != peer->m_ping_start.load().count())) {
|
|
ping_wait = GetTime<std::chrono::microseconds>() - peer->m_ping_start.load();
|
|
}
|
|
|
|
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
|
|
stats.m_relay_txs = WITH_LOCK(tx_relay->m_bloom_filter_mutex, return tx_relay->m_relay_txs);
|
|
} else {
|
|
stats.m_relay_txs = false;
|
|
}
|
|
|
|
stats.m_ping_wait = ping_wait;
|
|
stats.m_addr_processed = peer->m_addr_processed.load();
|
|
stats.m_addr_rate_limited = peer->m_addr_rate_limited.load();
|
|
stats.m_addr_relay_enabled = peer->m_addr_relay_enabled.load();
|
|
|
|
return true;
|
|
}
|
|
|
|
void PeerManagerImpl::AddToCompactExtraTransactions(const CTransactionRef& tx) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)
|
|
{
|
|
size_t max_extra_txn = gArgs.GetArg("-blockreconstructionextratxn", DEFAULT_BLOCK_RECONSTRUCTION_EXTRA_TXN);
|
|
if (max_extra_txn <= 0)
|
|
return;
|
|
if (!vExtraTxnForCompact.size())
|
|
vExtraTxnForCompact.resize(max_extra_txn);
|
|
vExtraTxnForCompact[vExtraTxnForCompactIt] = std::make_pair(tx->GetHash(), tx);
|
|
vExtraTxnForCompactIt = (vExtraTxnForCompactIt + 1) % max_extra_txn;
|
|
}
|
|
|
|
void PeerManagerImpl::Misbehaving(const NodeId pnode, const int howmuch, const std::string& message)
|
|
{
|
|
assert(howmuch > 0);
|
|
|
|
PeerRef peer = GetPeerRef(pnode);
|
|
if (peer == nullptr) return;
|
|
|
|
LOCK(peer->m_misbehavior_mutex);
|
|
const int score_before{peer->m_misbehavior_score};
|
|
peer->m_misbehavior_score += howmuch;
|
|
const int score_now{peer->m_misbehavior_score};
|
|
|
|
const std::string message_prefixed = message.empty() ? "" : (": " + message);
|
|
std::string warning;
|
|
|
|
if (score_now >= DISCOURAGEMENT_THRESHOLD && score_before < DISCOURAGEMENT_THRESHOLD) {
|
|
warning = " DISCOURAGE THRESHOLD EXCEEDED";
|
|
peer->m_should_discourage = true;
|
|
::g_stats_client->inc("misbehavior.banned", 1.0f);
|
|
} else {
|
|
::g_stats_client->count("misbehavior.amount", howmuch, 1.0);
|
|
}
|
|
|
|
LogPrint(BCLog::NET, "Misbehaving: peer=%d (%d -> %d)%s%s\n",
|
|
pnode, score_before, score_now, warning, message_prefixed);
|
|
}
|
|
|
|
bool PeerManagerImpl::IsBanned(NodeId pnode)
|
|
{
|
|
PeerRef peer = GetPeerRef(pnode);
|
|
if (peer == nullptr)
|
|
return false;
|
|
LOCK(peer->m_misbehavior_mutex);
|
|
if (peer->m_should_discourage) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool PeerManagerImpl::MaybePunishNodeForBlock(NodeId nodeid, const BlockValidationState& state,
|
|
bool via_compact_block, const std::string& message)
|
|
{
|
|
switch (state.GetResult()) {
|
|
case BlockValidationResult::BLOCK_RESULT_UNSET:
|
|
break;
|
|
// The node is providing invalid data:
|
|
case BlockValidationResult::BLOCK_CONSENSUS:
|
|
case BlockValidationResult::BLOCK_MUTATED:
|
|
if (!via_compact_block) {
|
|
Misbehaving(nodeid, 100, message);
|
|
return true;
|
|
}
|
|
break;
|
|
case BlockValidationResult::BLOCK_CACHED_INVALID:
|
|
{
|
|
LOCK(cs_main);
|
|
CNodeState *node_state = State(nodeid);
|
|
if (node_state == nullptr) {
|
|
break;
|
|
}
|
|
|
|
// Discourage outbound (but not inbound) peers if on an invalid chain.
|
|
// Exempt HB compact block peers. Manual connections are always protected from discouragement.
|
|
if (!via_compact_block && !node_state->m_is_inbound) {
|
|
Misbehaving(nodeid, 100, message);
|
|
return true;
|
|
}
|
|
break;
|
|
}
|
|
case BlockValidationResult::BLOCK_INVALID_HEADER:
|
|
case BlockValidationResult::BLOCK_CHECKPOINT:
|
|
case BlockValidationResult::BLOCK_INVALID_PREV:
|
|
Misbehaving(nodeid, 100, message);
|
|
return true;
|
|
// Conflicting (but not necessarily invalid) data or different policy:
|
|
case BlockValidationResult::BLOCK_MISSING_PREV:
|
|
case BlockValidationResult::BLOCK_CHAINLOCK:
|
|
Misbehaving(nodeid, 10, message);
|
|
return true;
|
|
case BlockValidationResult::BLOCK_RECENT_CONSENSUS_CHANGE:
|
|
case BlockValidationResult::BLOCK_TIME_FUTURE:
|
|
break;
|
|
}
|
|
if (message != "") {
|
|
LogPrint(BCLog::NET, "peer=%d: %s\n", nodeid, message);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool PeerManagerImpl::MaybePunishNodeForTx(NodeId nodeid, const TxValidationState& state, const std::string& message) {
|
|
switch (state.GetResult()) {
|
|
case TxValidationResult::TX_RESULT_UNSET:
|
|
break;
|
|
// The node is providing invalid data:
|
|
case TxValidationResult::TX_CONSENSUS:
|
|
{
|
|
LOCK(cs_main);
|
|
Misbehaving(nodeid, 100, message);
|
|
return true;
|
|
}
|
|
// Conflicting (but not necessarily invalid) data or different policy:
|
|
case TxValidationResult::TX_RECENT_CONSENSUS_CHANGE:
|
|
case TxValidationResult::TX_INPUTS_NOT_STANDARD:
|
|
case TxValidationResult::TX_NOT_STANDARD:
|
|
case TxValidationResult::TX_MISSING_INPUTS:
|
|
case TxValidationResult::TX_PREMATURE_SPEND:
|
|
case TxValidationResult::TX_CONFLICT:
|
|
case TxValidationResult::TX_MEMPOOL_POLICY:
|
|
case TxValidationResult::TX_NO_MEMPOOL:
|
|
// moved from BLOCK
|
|
case TxValidationResult::TX_BAD_SPECIAL:
|
|
case TxValidationResult::TX_CONFLICT_LOCK:
|
|
break;
|
|
}
|
|
if (message != "") {
|
|
LogPrint(BCLog::NET, "peer=%d: %s\n", nodeid, message);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool PeerManagerImpl::BlockRequestAllowed(const CBlockIndex* pindex)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
if (m_chainman.ActiveChain().Contains(pindex)) return true;
|
|
return pindex->IsValid(BLOCK_VALID_SCRIPTS) && (m_chainman.m_best_header != nullptr) &&
|
|
(m_chainman.m_best_header->GetBlockTime() - pindex->GetBlockTime() < STALE_RELAY_AGE_LIMIT) &&
|
|
(GetBlockProofEquivalentTime(*m_chainman.m_best_header, *pindex, *m_chainman.m_best_header, m_chainparams.GetConsensus()) < STALE_RELAY_AGE_LIMIT);
|
|
}
|
|
|
|
std::optional<std::string> PeerManagerImpl::FetchBlock(NodeId peer_id, const CBlockIndex& block_index)
|
|
{
|
|
if (fImporting) return "Importing...";
|
|
if (fReindex) return "Reindexing...";
|
|
|
|
// Ensure this peer exists and hasn't been disconnected
|
|
PeerRef peer = GetPeerRef(peer_id);
|
|
if (peer == nullptr) return "Peer does not exist";
|
|
|
|
LOCK(cs_main);
|
|
// Mark block as in-flight unless it already is (for this peer).
|
|
// If a block was already in-flight for a different peer, its BLOCKTXN
|
|
// response will be dropped.
|
|
if (!BlockRequested(peer_id, block_index)) return "Already requested from this peer";
|
|
|
|
// Construct message to request the block
|
|
const uint256& hash{block_index.GetBlockHash()};
|
|
std::vector<CInv> invs{CInv(MSG_BLOCK, hash)};
|
|
|
|
// Send block request message to the peer
|
|
bool success = m_connman.ForNode(peer_id, [this, &invs](CNode* node) {
|
|
const CNetMsgMaker msgMaker(node->GetCommonVersion());
|
|
this->m_connman.PushMessage(node, msgMaker.Make(NetMsgType::GETDATA, invs));
|
|
return true;
|
|
});
|
|
|
|
if (!success) return "Peer not fully connected";
|
|
|
|
LogPrint(BCLog::NET, "Requesting block %s from peer=%d\n",
|
|
hash.ToString(), peer_id);
|
|
return std::nullopt;
|
|
}
|
|
|
|
std::unique_ptr<PeerManager> PeerManager::make(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman, BanMan* banman,
|
|
ChainstateManager& chainman, CTxMemPool& pool,
|
|
CMasternodeMetaMan& mn_metaman, CMasternodeSync& mn_sync,
|
|
CGovernanceManager& govman, CSporkManager& sporkman,
|
|
const CActiveMasternodeManager* const mn_activeman,
|
|
const std::unique_ptr<CDeterministicMNManager>& dmnman,
|
|
const std::unique_ptr<CJContext>& cj_ctx,
|
|
const std::unique_ptr<LLMQContext>& llmq_ctx, bool ignore_incoming_txs)
|
|
{
|
|
return std::make_unique<PeerManagerImpl>(chainparams, connman, addrman, banman, chainman, pool, mn_metaman, mn_sync, govman, sporkman, mn_activeman, dmnman, cj_ctx, llmq_ctx, ignore_incoming_txs);
|
|
}
|
|
|
|
PeerManagerImpl::PeerManagerImpl(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman, BanMan* banman,
|
|
ChainstateManager& chainman, CTxMemPool& pool,
|
|
CMasternodeMetaMan& mn_metaman, CMasternodeSync& mn_sync,
|
|
CGovernanceManager& govman, CSporkManager& sporkman,
|
|
const CActiveMasternodeManager* const mn_activeman,
|
|
const std::unique_ptr<CDeterministicMNManager>& dmnman,
|
|
const std::unique_ptr<CJContext>& cj_ctx,
|
|
const std::unique_ptr<LLMQContext>& llmq_ctx,
|
|
bool ignore_incoming_txs)
|
|
: m_chainparams(chainparams),
|
|
m_connman(connman),
|
|
m_addrman(addrman),
|
|
m_banman(banman),
|
|
m_chainman(chainman),
|
|
m_mempool(pool),
|
|
m_dmnman(dmnman),
|
|
m_cj_ctx(cj_ctx),
|
|
m_llmq_ctx(llmq_ctx),
|
|
m_mn_metaman(mn_metaman),
|
|
m_mn_sync(mn_sync),
|
|
m_govman(govman),
|
|
m_sporkman(sporkman),
|
|
m_mn_activeman(mn_activeman),
|
|
m_ignore_incoming_txs(ignore_incoming_txs)
|
|
{
|
|
// While Erlay support is incomplete, it must be enabled explicitly via -txreconciliation.
|
|
// This argument can go away after Erlay support is complete.
|
|
if (gArgs.GetBoolArg("-txreconciliation", DEFAULT_TXRECONCILIATION_ENABLE)) {
|
|
m_txreconciliation = std::make_unique<TxReconciliationTracker>(TXRECONCILIATION_VERSION);
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::StartScheduledTasks(CScheduler& scheduler)
|
|
{
|
|
// Stale tip checking and peer eviction are on two different timers, but we
|
|
// don't want them to get out of sync due to drift in the scheduler, so we
|
|
// combine them in one function and schedule at the quicker (peer-eviction)
|
|
// timer.
|
|
static_assert(EXTRA_PEER_CHECK_INTERVAL < STALE_CHECK_INTERVAL, "peer eviction timer should be less than stale tip check timer");
|
|
scheduler.scheduleEvery([this] { this->CheckForStaleTipAndEvictPeers(); }, std::chrono::seconds{EXTRA_PEER_CHECK_INTERVAL});
|
|
|
|
// schedule next run for 10-15 minutes in the future
|
|
const std::chrono::milliseconds delta = 10min + GetRandMillis(5min);
|
|
scheduler.scheduleFromNow([&] { ReattemptInitialBroadcast(scheduler); }, delta);
|
|
}
|
|
|
|
/**
|
|
* Evict orphan txn pool entries based on a newly connected
|
|
* block. Also save the time of the last tip update and
|
|
* possibly reduce dynamic block stalling timeout.
|
|
*/
|
|
void PeerManagerImpl::BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindex)
|
|
{
|
|
{
|
|
LOCK2(::cs_main, g_cs_orphans);
|
|
|
|
auto orphanWorkSet = m_orphanage.GetCandidatesForBlock(*pblock);
|
|
while (!orphanWorkSet.empty()) {
|
|
LogPrint(BCLog::MEMPOOL, "Trying to process %d orphans\n", orphanWorkSet.size());
|
|
ProcessOrphanTx(orphanWorkSet);
|
|
}
|
|
}
|
|
|
|
m_orphanage.EraseForBlock(*pblock);
|
|
m_last_tip_update = GetTime<std::chrono::seconds>();
|
|
|
|
{
|
|
LOCK(m_recent_confirmed_transactions_mutex);
|
|
for (const auto& ptx : pblock->vtx) {
|
|
m_recent_confirmed_transactions.insert(ptx->GetHash());
|
|
}
|
|
}
|
|
|
|
// In case the dynamic timeout was doubled once or more, reduce it slowly back to its default value
|
|
auto stalling_timeout = m_block_stalling_timeout.load();
|
|
Assume(stalling_timeout >= BLOCK_STALLING_TIMEOUT_DEFAULT);
|
|
if (stalling_timeout != BLOCK_STALLING_TIMEOUT_DEFAULT) {
|
|
const auto new_timeout = std::max(std::chrono::duration_cast<std::chrono::seconds>(stalling_timeout * 0.85), BLOCK_STALLING_TIMEOUT_DEFAULT);
|
|
if (m_block_stalling_timeout.compare_exchange_strong(stalling_timeout, new_timeout)) {
|
|
LogPrint(BCLog::NET, "Decreased stalling timeout to %d seconds\n", count_seconds(new_timeout));
|
|
}
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::BlockDisconnected(const std::shared_ptr<const CBlock> &block, const CBlockIndex* pindex)
|
|
{
|
|
// To avoid relay problems with transactions that were previously
|
|
// confirmed, clear our filter of recently confirmed transactions whenever
|
|
// there's a reorg.
|
|
// This means that in a 1-block reorg (where 1 block is disconnected and
|
|
// then another block reconnected), our filter will drop to having only one
|
|
// block's worth of transactions in it, but that should be fine, since
|
|
// presumably the most common case of relaying a confirmed transaction
|
|
// should be just after a new block containing it is found.
|
|
LOCK(m_recent_confirmed_transactions_mutex);
|
|
m_recent_confirmed_transactions.reset();
|
|
}
|
|
|
|
/**
|
|
* Maintain state about the best-seen block and fast-announce a compact block
|
|
* to compatible peers.
|
|
*/
|
|
void PeerManagerImpl::NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) {
|
|
auto pcmpctblock = std::make_shared<const CBlockHeaderAndShortTxIDs>(*pblock);
|
|
const CNetMsgMaker msgMaker(PROTOCOL_VERSION);
|
|
|
|
LOCK(cs_main);
|
|
|
|
if (pindex->nHeight <= m_highest_fast_announce)
|
|
return;
|
|
m_highest_fast_announce = pindex->nHeight;
|
|
|
|
uint256 hashBlock(pblock->GetHash());
|
|
const std::shared_future<CSerializedNetMsg> lazy_ser{
|
|
std::async(std::launch::deferred, [&] { return msgMaker.Make(NetMsgType::CMPCTBLOCK, *pcmpctblock); })};
|
|
|
|
{
|
|
LOCK(m_most_recent_block_mutex);
|
|
m_most_recent_block_hash = hashBlock;
|
|
m_most_recent_block = pblock;
|
|
m_most_recent_compact_block = pcmpctblock;
|
|
}
|
|
|
|
m_connman.ForEachNode([this, pindex, &lazy_ser, &hashBlock](CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
|
|
AssertLockHeld(::cs_main);
|
|
// TODO: Avoid the repeated-serialization here
|
|
if (pnode->fDisconnect)
|
|
return;
|
|
ProcessBlockAvailability(pnode->GetId());
|
|
CNodeState &state = *State(pnode->GetId());
|
|
// If the peer has, or we announced to them the previous block already,
|
|
// but we don't think they have this one, go ahead and announce it
|
|
if (state.m_requested_hb_cmpctblocks && !PeerHasHeader(&state, pindex) && PeerHasHeader(&state, pindex->pprev)) {
|
|
LogPrint(BCLog::NET, "%s sending header-and-ids %s to peer=%d\n", "PeerManager::NewPoWValidBlock",
|
|
hashBlock.ToString(), pnode->GetId());
|
|
|
|
const CSerializedNetMsg& ser_cmpctblock{lazy_ser.get()};
|
|
m_connman.PushMessage(pnode, ser_cmpctblock.Copy());
|
|
state.pindexBestHeaderSent = pindex;
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Update our best height and announce any block hashes which weren't previously
|
|
* in m_chainman.ActiveChain() to our peers.
|
|
*/
|
|
void PeerManagerImpl::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload){
|
|
m_best_height = pindexNew->nHeight;
|
|
|
|
SetServiceFlagsIBDCache(!fInitialDownload);
|
|
|
|
// Don't relay inventory during initial block download.
|
|
if (fInitialDownload) return;
|
|
|
|
// Find the hashes of all blocks that weren't previously in the best chain.
|
|
std::vector<uint256> vHashes;
|
|
const CBlockIndex *pindexToAnnounce = pindexNew;
|
|
while (pindexToAnnounce != pindexFork) {
|
|
vHashes.push_back(pindexToAnnounce->GetBlockHash());
|
|
pindexToAnnounce = pindexToAnnounce->pprev;
|
|
if (vHashes.size() == MAX_BLOCKS_TO_ANNOUNCE) {
|
|
// Limit announcements in case of a huge reorganization.
|
|
// Rely on the peer's synchronization mechanism in that case.
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Relay to all peers
|
|
// TODO: Move CanRelay() to Peer and migrate to iteration through m_peer_map
|
|
m_connman.ForEachNode([this, &vHashes](CNode* pnode) {
|
|
if (!pnode->CanRelay()) return;
|
|
|
|
PeerRef peer = GetPeerRef(pnode->GetId());
|
|
if (peer == nullptr) return;
|
|
|
|
LOCK(peer->m_block_inv_mutex);
|
|
for (const uint256& hash : reverse_iterate(vHashes)) {
|
|
peer->m_blocks_for_headers_relay.push_back(hash);
|
|
}
|
|
});
|
|
m_connman.WakeMessageHandler();
|
|
}
|
|
|
|
/**
|
|
* Handle invalid block rejection and consequent peer discouragement, maintain which
|
|
* peers announce compact blocks.
|
|
*/
|
|
void PeerManagerImpl::BlockChecked(const CBlock& block, const BlockValidationState& state)
|
|
{
|
|
LOCK(cs_main);
|
|
|
|
const uint256 hash(block.GetHash());
|
|
std::map<uint256, std::pair<NodeId, bool> >::iterator it = mapBlockSource.find(hash);
|
|
|
|
// If the block failed validation, we know where it came from and we're still connected
|
|
// to that peer, maybe punish.
|
|
if (state.IsInvalid() &&
|
|
it != mapBlockSource.end() &&
|
|
State(it->second.first)) {
|
|
MaybePunishNodeForBlock(/*nodeid=*/ it->second.first, state, /*via_compact_block=*/ !it->second.second);
|
|
}
|
|
// Check that:
|
|
// 1. The block is valid
|
|
// 2. We're not in initial block download
|
|
// 3. This is currently the best block we're aware of. We haven't updated
|
|
// the tip yet so we have no way to check this directly here. Instead we
|
|
// just check that there are currently no other blocks in flight.
|
|
else if (state.IsValid() &&
|
|
!m_chainman.ActiveChainstate().IsInitialBlockDownload() &&
|
|
mapBlocksInFlight.count(hash) == mapBlocksInFlight.size()) {
|
|
if (it != mapBlockSource.end()) {
|
|
MaybeSetPeerAsAnnouncingHeaderAndIDs(it->second.first);
|
|
}
|
|
}
|
|
if (it != mapBlockSource.end())
|
|
mapBlockSource.erase(it);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Messages
|
|
//
|
|
|
|
|
|
bool PeerManagerImpl::AlreadyHave(const CInv& inv)
|
|
{
|
|
switch (inv.type)
|
|
{
|
|
case MSG_TX:
|
|
case MSG_DSTX:
|
|
{
|
|
if (m_chainman.ActiveChain().Tip()->GetBlockHash() != hashRecentRejectsChainTip)
|
|
{
|
|
// If the chain tip has changed previously rejected transactions
|
|
// might be now valid, e.g. due to a nLockTime'd tx becoming valid,
|
|
// or a double-spend. Reset the rejects filter and give those
|
|
// txs a second chance.
|
|
hashRecentRejectsChainTip = m_chainman.ActiveChain().Tip()->GetBlockHash();
|
|
m_recent_rejects.reset();
|
|
}
|
|
|
|
if (m_orphanage.HaveTx(inv.hash)) return true;
|
|
|
|
{
|
|
LOCK(m_recent_confirmed_transactions_mutex);
|
|
if (m_recent_confirmed_transactions.contains(inv.hash)) return true;
|
|
}
|
|
|
|
// When we receive an islock for a previously rejected transaction, we have to
|
|
// drop the first-seen tx (which such a locked transaction was conflicting with)
|
|
// and re-request the locked transaction (which did not make it into the mempool
|
|
// previously due to txn-mempool-conflict rule). This means that we must ignore
|
|
// m_recent_rejects filter for such locked txes here.
|
|
// We also ignore m_recent_rejects filter for DSTX-es because a malicious peer might
|
|
// relay a valid DSTX as a regular TX first which would skip all the specific checks
|
|
// but would cause such tx to be rejected by ATMP due to 0 fee. Ignoring it here
|
|
// should let DSTX to be propagated by honest peer later. Note, that a malicious
|
|
// masternode would not be able to exploit this to spam the network with specially
|
|
// crafted invalid DSTX-es and potentially cause high load cheaply, because
|
|
// corresponding checks in ProcessMessage won't let it to send DSTX-es too often.
|
|
bool fIgnoreRecentRejects = inv.IsMsgDstx() ||
|
|
m_llmq_ctx->isman->IsWaitingForTx(inv.hash) ||
|
|
m_llmq_ctx->isman->IsLocked(inv.hash);
|
|
|
|
return (!fIgnoreRecentRejects && m_recent_rejects.contains(inv.hash)) ||
|
|
(inv.IsMsgDstx() && static_cast<bool>(m_cj_ctx->dstxman->GetDSTX(inv.hash))) ||
|
|
m_mempool.exists(inv.hash) ||
|
|
(g_txindex != nullptr && g_txindex->HasTx(inv.hash));
|
|
}
|
|
|
|
/*
|
|
Dash Related Inventory Messages
|
|
|
|
--
|
|
|
|
We shouldn't update the sync times for each of the messages when we already have it.
|
|
We're going to be asking many nodes upfront for the full inventory list, so we'll get duplicates of these.
|
|
We want to only update the time on new hits, so that we can time out appropriately if needed.
|
|
*/
|
|
|
|
case MSG_SPORK:
|
|
{
|
|
return m_sporkman.GetSporkByHash(inv.hash).has_value();
|
|
}
|
|
|
|
case MSG_GOVERNANCE_OBJECT:
|
|
case MSG_GOVERNANCE_OBJECT_VOTE:
|
|
return !m_govman.ConfirmInventoryRequest(inv);
|
|
|
|
case MSG_QUORUM_FINAL_COMMITMENT:
|
|
return m_llmq_ctx->quorum_block_processor->HasMineableCommitment(inv.hash);
|
|
case MSG_QUORUM_CONTRIB:
|
|
case MSG_QUORUM_COMPLAINT:
|
|
case MSG_QUORUM_JUSTIFICATION:
|
|
case MSG_QUORUM_PREMATURE_COMMITMENT:
|
|
return m_llmq_ctx->qdkgsman->AlreadyHave(inv);
|
|
case MSG_QUORUM_RECOVERED_SIG:
|
|
return m_llmq_ctx->sigman->AlreadyHave(inv);
|
|
case MSG_CLSIG:
|
|
return m_llmq_ctx->clhandler->AlreadyHave(inv);
|
|
case MSG_ISDLOCK:
|
|
return m_llmq_ctx->isman->AlreadyHave(inv);
|
|
case MSG_DSQ:
|
|
#ifdef ENABLE_WALLET
|
|
return m_cj_ctx->server->HasQueue(inv.hash) || m_cj_ctx->queueman->HasQueue(inv.hash);
|
|
#else
|
|
return m_cj_ctx->server->HasQueue(inv.hash);
|
|
#endif
|
|
}
|
|
|
|
|
|
// Don't know what it is, just say we already got one
|
|
return true;
|
|
}
|
|
|
|
bool PeerManagerImpl::AlreadyHaveBlock(const uint256& block_hash)
|
|
{
|
|
return m_chainman.m_blockman.LookupBlockIndex(block_hash) != nullptr;
|
|
}
|
|
|
|
void PeerManagerImpl::SendPings()
|
|
{
|
|
LOCK(m_peer_mutex);
|
|
for(auto& it : m_peer_map) it.second->m_ping_queued = true;
|
|
}
|
|
|
|
bool PeerManagerImpl::IsInvInFilter(NodeId nodeid, const uint256& hash) const
|
|
{
|
|
PeerRef peer = GetPeerRef(nodeid);
|
|
if (peer == nullptr)
|
|
return false;
|
|
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
|
|
LOCK(tx_relay->m_tx_inventory_mutex);
|
|
return tx_relay->m_tx_inventory_known_filter.contains(hash);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void PeerManagerImpl::PushInventory(NodeId nodeid, const CInv& inv)
|
|
{
|
|
// TODO: Get rid of this function at some point
|
|
PeerRef peer = GetPeerRef(nodeid);
|
|
if (peer == nullptr)
|
|
return;
|
|
PushInv(*peer, inv);
|
|
}
|
|
|
|
void PeerManagerImpl::RelayInv(CInv &inv, const int minProtoVersion)
|
|
{
|
|
// TODO: Migrate to iteration through m_peer_map
|
|
m_connman.ForEachNode([&](CNode* pnode) {
|
|
if (pnode->nVersion < minProtoVersion || !pnode->CanRelay())
|
|
return;
|
|
|
|
PeerRef peer = GetPeerRef(pnode->GetId());
|
|
if (peer == nullptr) return;
|
|
PushInv(*peer, inv);
|
|
});
|
|
}
|
|
|
|
void PeerManagerImpl::RelayInvFiltered(CInv &inv, const CTransaction& relatedTx, const int minProtoVersion)
|
|
{
|
|
// TODO: Migrate to iteration through m_peer_map
|
|
m_connman.ForEachNode([&](CNode* pnode) {
|
|
PeerRef peer = GetPeerRef(pnode->GetId());
|
|
if (peer == nullptr) return;
|
|
|
|
auto tx_relay = peer->GetTxRelay();
|
|
if (pnode->nVersion < minProtoVersion || !pnode->CanRelay() || tx_relay == nullptr) {
|
|
return;
|
|
}
|
|
|
|
{
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
if (!tx_relay->m_relay_txs) {
|
|
return;
|
|
}
|
|
if (tx_relay->m_bloom_filter && !tx_relay->m_bloom_filter->IsRelevantAndUpdate(relatedTx)) {
|
|
return;
|
|
}
|
|
} // LOCK(tx_relay->m_bloom_filter_mutex)
|
|
PushInv(*peer, inv);
|
|
});
|
|
}
|
|
|
|
void PeerManagerImpl::RelayInvFiltered(CInv &inv, const uint256& relatedTxHash, const int minProtoVersion)
|
|
{
|
|
// TODO: Migrate to iteration through m_peer_map
|
|
m_connman.ForEachNode([&](CNode* pnode) {
|
|
PeerRef peer = GetPeerRef(pnode->GetId());
|
|
if (peer == nullptr) return;
|
|
|
|
auto tx_relay = peer->GetTxRelay();
|
|
if (pnode->nVersion < minProtoVersion || !pnode->CanRelay() || tx_relay == nullptr) {
|
|
return;
|
|
}
|
|
|
|
{
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
if (!tx_relay->m_relay_txs) {
|
|
return;
|
|
}
|
|
if (tx_relay->m_bloom_filter && !tx_relay->m_bloom_filter->contains(relatedTxHash)) {
|
|
return;
|
|
}
|
|
} // LOCK(tx_relay->m_bloom_filter_mutex)
|
|
PushInv(*peer, inv);
|
|
});
|
|
}
|
|
|
|
void PeerManagerImpl::RelayTransaction(const uint256& txid)
|
|
{
|
|
LOCK(m_peer_mutex);
|
|
for(auto& it : m_peer_map) {
|
|
Peer& peer = *it.second;
|
|
auto tx_relay = peer.GetTxRelay();
|
|
if (!tx_relay) continue;
|
|
|
|
const CInv inv{m_cj_ctx->dstxman->GetDSTX(txid) ? MSG_DSTX : MSG_TX, txid};
|
|
PushInv(peer, inv);
|
|
};
|
|
}
|
|
|
|
void PeerManagerImpl::RelayAddress(NodeId originator,
|
|
const CAddress& addr,
|
|
bool fReachable)
|
|
{
|
|
// We choose the same nodes within a given 24h window (if the list of connected
|
|
// nodes does not change) and we don't relay to nodes that already know an
|
|
// address. So within 24h we will likely relay a given address once. This is to
|
|
// prevent a peer from unjustly giving their address better propagation by sending
|
|
// it to us repeatedly.
|
|
|
|
if (!fReachable && !addr.IsRelayable()) return;
|
|
|
|
// Relay to a limited number of other nodes
|
|
// Use deterministic randomness to send to the same nodes for 24 hours
|
|
// at a time so the m_addr_knowns of the chosen nodes prevent repeats
|
|
const uint64_t hashAddr{addr.GetHash()};
|
|
const CSipHasher hasher{m_connman.GetDeterministicRandomizer(RANDOMIZER_ID_ADDRESS_RELAY).Write(hashAddr).Write((GetTime() + hashAddr) / (24 * 60 * 60))};
|
|
FastRandomContext insecure_rand;
|
|
|
|
// Relay reachable addresses to 2 peers. Unreachable addresses are relayed randomly to 1 or 2 peers.
|
|
unsigned int nRelayNodes = (fReachable || (hasher.Finalize() & 1)) ? 2 : 1;
|
|
|
|
std::array<std::pair<uint64_t, Peer*>, 2> best{{{0, nullptr}, {0, nullptr}}};
|
|
assert(nRelayNodes <= best.size());
|
|
|
|
LOCK(m_peer_mutex);
|
|
|
|
for (auto& [id, peer] : m_peer_map) {
|
|
if (peer->m_addr_relay_enabled && id != originator && IsAddrCompatible(*peer, addr)) {
|
|
uint64_t hashKey = CSipHasher(hasher).Write(id).Finalize();
|
|
for (unsigned int i = 0; i < nRelayNodes; i++) {
|
|
if (hashKey > best[i].first) {
|
|
std::copy(best.begin() + i, best.begin() + nRelayNodes - 1, best.begin() + i + 1);
|
|
best[i] = std::make_pair(hashKey, peer.get());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
for (unsigned int i = 0; i < nRelayNodes && best[i].first != 0; i++) {
|
|
PushAddress(*best[i].second, addr, insecure_rand);
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessGetBlockData(CNode& pfrom, Peer& peer, const CInv& inv, llmq::CInstantSendManager& isman)
|
|
{
|
|
std::shared_ptr<const CBlock> a_recent_block;
|
|
std::shared_ptr<const CBlockHeaderAndShortTxIDs> a_recent_compact_block;
|
|
{
|
|
LOCK(m_most_recent_block_mutex);
|
|
a_recent_block = m_most_recent_block;
|
|
a_recent_compact_block = m_most_recent_compact_block;
|
|
}
|
|
|
|
bool need_activate_chain = false;
|
|
{
|
|
LOCK(cs_main);
|
|
const CBlockIndex* pindex = m_chainman.m_blockman.LookupBlockIndex(inv.hash);
|
|
if (pindex) {
|
|
if (pindex->HaveTxsDownloaded() && !pindex->IsValid(BLOCK_VALID_SCRIPTS) &&
|
|
pindex->IsValid(BLOCK_VALID_TREE)) {
|
|
// If we have the block and all of its parents, but have not yet validated it,
|
|
// we might be in the middle of connecting it (ie in the unlock of cs_main
|
|
// before ActivateBestChain but after AcceptBlock).
|
|
// In this case, we need to run ActivateBestChain prior to checking the relay
|
|
// conditions below.
|
|
need_activate_chain = true;
|
|
}
|
|
}
|
|
} // release cs_main before calling ActivateBestChain
|
|
if (need_activate_chain) {
|
|
BlockValidationState state;
|
|
if (!m_chainman.ActiveChainstate().ActivateBestChain(state, a_recent_block)) {
|
|
LogPrint(BCLog::NET, "failed to activate chain (%s)\n", state.ToString());
|
|
}
|
|
}
|
|
|
|
LOCK(cs_main);
|
|
const CBlockIndex* pindex = m_chainman.m_blockman.LookupBlockIndex(inv.hash);
|
|
if (!pindex) {
|
|
return;
|
|
}
|
|
if (!BlockRequestAllowed(pindex)) {
|
|
LogPrint(BCLog::NET, "%s: ignoring request from peer=%i for old block that isn't in the main chain\n", __func__, pfrom.GetId());
|
|
return;
|
|
}
|
|
const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
|
|
// disconnect node in case we have reached the outbound limit for serving historical blocks
|
|
if (m_connman.OutboundTargetReached(true) &&
|
|
(((m_chainman.m_best_header != nullptr) && (m_chainman.m_best_header->GetBlockTime() - pindex->GetBlockTime() > HISTORICAL_BLOCK_AGE)) || inv.IsMsgFilteredBlk()) &&
|
|
!pfrom.HasPermission(NetPermissionFlags::Download) // nodes with the download permission may exceed target
|
|
) {
|
|
LogPrint(BCLog::NET, "historical block serving limit reached, disconnect peer=%d\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
// Avoid leaking prune-height by never sending blocks below the NODE_NETWORK_LIMITED threshold
|
|
if (!pfrom.HasPermission(NetPermissionFlags::NoBan) && (
|
|
(((peer.m_our_services & NODE_NETWORK_LIMITED) == NODE_NETWORK_LIMITED) && ((peer.m_our_services & NODE_NETWORK) != NODE_NETWORK) && (m_chainman.ActiveChain().Tip()->nHeight - pindex->nHeight > (int)NODE_NETWORK_LIMITED_MIN_BLOCKS + 2 /* add two blocks buffer extension for possible races */) )
|
|
)) {
|
|
LogPrint(BCLog::NET, "Ignore block request below NODE_NETWORK_LIMITED threshold, disconnect peer=%d\n", pfrom.GetId());
|
|
//disconnect node and prevent it from stalling (would otherwise wait for the missing block)
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
// Pruned nodes may have deleted the block, so check whether
|
|
// it's available before trying to send.
|
|
if (!(pindex->nStatus & BLOCK_HAVE_DATA)) {
|
|
return;
|
|
}
|
|
std::shared_ptr<const CBlock> pblock;
|
|
if (a_recent_block && a_recent_block->GetHash() == pindex->GetBlockHash()) {
|
|
pblock = a_recent_block;
|
|
} else {
|
|
// Send block from disk
|
|
std::shared_ptr<CBlock> pblockRead = std::make_shared<CBlock>();
|
|
if (!ReadBlockFromDisk(*pblockRead, pindex, m_chainparams.GetConsensus()))
|
|
assert(!"cannot load block from disk");
|
|
pblock = pblockRead;
|
|
}
|
|
if (pblock) {
|
|
if (inv.IsMsgBlk()) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::BLOCK, *pblock));
|
|
} else if (inv.IsMsgFilteredBlk()) {
|
|
bool sendMerkleBlock = false;
|
|
CMerkleBlock merkleBlock;
|
|
if (auto tx_relay = peer.GetTxRelay(); tx_relay != nullptr) {
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
if (tx_relay->m_bloom_filter) {
|
|
sendMerkleBlock = true;
|
|
merkleBlock = CMerkleBlock(*pblock, *tx_relay->m_bloom_filter);
|
|
}
|
|
}
|
|
if (sendMerkleBlock) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::MERKLEBLOCK, merkleBlock));
|
|
// CMerkleBlock just contains hashes, so also push any transactions in the block the client did not see
|
|
// This avoids hurting performance by pointlessly requiring a round-trip
|
|
// Note that there is currently no way for a node to request any single transactions we didn't send here -
|
|
// they must either disconnect and retry or request the full block.
|
|
// Thus, the protocol spec specified allows for us to provide duplicate txn here,
|
|
// however we MUST always provide at least what the remote peer needs
|
|
typedef std::pair<unsigned int, uint256> PairType;
|
|
for (PairType &pair : merkleBlock.vMatchedTxn) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::TX, *pblock->vtx[pair.first]));
|
|
}
|
|
for (PairType &pair : merkleBlock.vMatchedTxn) {
|
|
auto islock = isman.GetInstantSendLockByTxid(pair.second);
|
|
if (islock != nullptr) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::ISDLOCK, *islock));
|
|
}
|
|
}
|
|
}
|
|
// else
|
|
// no response
|
|
} else if (inv.IsMsgCmpctBlk()) {
|
|
// If a peer is asking for old blocks, we're almost guaranteed
|
|
// they won't have a useful mempool to match against a compact block,
|
|
// and we don't feel like constructing the object for them, so
|
|
// instead we respond with the full, non-compact block.
|
|
if (CanDirectFetch() &&
|
|
pindex->nHeight >= m_chainman.ActiveChain().Height() - MAX_CMPCTBLOCK_DEPTH) {
|
|
if (a_recent_compact_block &&
|
|
a_recent_compact_block->header.GetHash() == pindex->GetBlockHash()) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::CMPCTBLOCK, *a_recent_compact_block));
|
|
} else {
|
|
CBlockHeaderAndShortTxIDs cmpctblock{*pblock};
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::CMPCTBLOCK, cmpctblock));
|
|
}
|
|
} else {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::BLOCK, *pblock));
|
|
}
|
|
}
|
|
}
|
|
|
|
{
|
|
LOCK(peer.m_block_inv_mutex);
|
|
// Trigger the peer node to send a getblocks request for the next batch of inventory
|
|
if (inv.hash == peer.m_continuation_block) {
|
|
// Send immediately. This must send even if redundant,
|
|
// and we want it right after the last block so they don't
|
|
// wait for other stuff first.
|
|
std::vector<CInv> vInv;
|
|
vInv.push_back(CInv(MSG_BLOCK, m_chainman.ActiveChain().Tip()->GetBlockHash()));
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::INV, vInv));
|
|
peer.m_continuation_block.SetNull();
|
|
}
|
|
}
|
|
}
|
|
|
|
//! Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed).
|
|
CTransactionRef PeerManagerImpl::FindTxForGetData(const CNode* peer, const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds now)
|
|
{
|
|
auto txinfo = m_mempool.info(txid);
|
|
if (txinfo.tx) {
|
|
// If a TX could have been INVed in reply to a MEMPOOL request,
|
|
// or is older than UNCONDITIONAL_RELAY_DELAY, permit the request
|
|
// unconditionally.
|
|
if ((mempool_req.count() && txinfo.m_time <= mempool_req) || txinfo.m_time <= now - UNCONDITIONAL_RELAY_DELAY) {
|
|
return std::move(txinfo.tx);
|
|
}
|
|
}
|
|
|
|
{
|
|
LOCK(cs_main);
|
|
|
|
// Otherwise, the transaction must have been announced recently.
|
|
if (State(peer->GetId())->m_recently_announced_invs.contains(txid)) {
|
|
// If it was, it can be relayed from either the mempool...
|
|
if (txinfo.tx) return std::move(txinfo.tx);
|
|
// ... or the relay pool.
|
|
auto mi = mapRelay.find(txid);
|
|
if (mi != mapRelay.end()) return mi->second;
|
|
}
|
|
}
|
|
|
|
return {};
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessGetData(CNode& pfrom, Peer& peer, const std::atomic<bool>& interruptMsgProc)
|
|
{
|
|
AssertLockNotHeld(cs_main);
|
|
|
|
auto tx_relay = peer.GetTxRelay();
|
|
|
|
std::deque<CInv>::iterator it = peer.m_getdata_requests.begin();
|
|
std::vector<CInv> vNotFound;
|
|
const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
|
|
|
|
const auto now{GetTime<std::chrono::seconds>()};
|
|
// Get last mempool request time
|
|
const auto mempool_req = tx_relay != nullptr ? tx_relay->m_last_mempool_req.load()
|
|
: std::chrono::seconds::min();
|
|
|
|
// Process as many TX items from the front of the getdata queue as
|
|
// possible, since they're common and it's efficient to batch process
|
|
// them.
|
|
while (it != peer.m_getdata_requests.end() && it->IsKnownType()) {
|
|
if (interruptMsgProc)
|
|
return;
|
|
// The send buffer provides backpressure. If there's no space in
|
|
// the buffer, pause processing until the next call.
|
|
if (pfrom.fPauseSend)
|
|
break;
|
|
|
|
const CInv &inv = *it;
|
|
|
|
if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK || inv.type == MSG_CMPCT_BLOCK) {
|
|
break;
|
|
}
|
|
++it;
|
|
|
|
if (tx_relay == nullptr && NetMessageViolatesBlocksOnly(inv.GetCommand())) {
|
|
// Note that if we receive a getdata for non-block messages
|
|
// from a block-relay-only outbound peer that violate the policy,
|
|
// we skip such getdata messages from this peer
|
|
continue;
|
|
}
|
|
|
|
bool push = false;
|
|
if (inv.IsGenTxMsg()) {
|
|
CTransactionRef tx = FindTxForGetData(&pfrom, inv.hash, mempool_req, now);
|
|
if (tx) {
|
|
CCoinJoinBroadcastTx dstx;
|
|
if (inv.IsMsgDstx()) {
|
|
dstx = m_cj_ctx->dstxman->GetDSTX(inv.hash);
|
|
}
|
|
if (dstx) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::DSTX, dstx));
|
|
} else {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::TX, *tx));
|
|
}
|
|
m_mempool.RemoveUnbroadcastTx(tx->GetHash());
|
|
push = true;
|
|
|
|
// As we're going to send tx, make sure its unconfirmed parents are made requestable.
|
|
std::vector<uint256> parent_ids_to_add;
|
|
{
|
|
LOCK(m_mempool.cs);
|
|
auto txiter = m_mempool.GetIter(tx->GetHash());
|
|
if (txiter) {
|
|
const CTxMemPoolEntry::Parents& parents = (*txiter)->GetMemPoolParentsConst();
|
|
parent_ids_to_add.reserve(parents.size());
|
|
for (const CTxMemPoolEntry& parent : parents) {
|
|
if (parent.GetTime() > now - UNCONDITIONAL_RELAY_DELAY) {
|
|
parent_ids_to_add.push_back(parent.GetTx().GetHash());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for (const uint256& parent_txid : parent_ids_to_add) {
|
|
// Relaying a transaction with a recent but unconfirmed parent.
|
|
if (WITH_LOCK(tx_relay->m_tx_inventory_mutex, return !tx_relay->m_tx_inventory_known_filter.contains(parent_txid))) {
|
|
LOCK(cs_main);
|
|
State(pfrom.GetId())->m_recently_announced_invs.insert(parent_txid);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!push && inv.type == MSG_SPORK) {
|
|
if (auto opt_spork = m_sporkman.GetSporkByHash(inv.hash)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::SPORK, *opt_spork));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && inv.type == MSG_GOVERNANCE_OBJECT) {
|
|
CDataStream ss(SER_NETWORK, pfrom.GetCommonVersion());
|
|
bool topush = false;
|
|
if (m_govman.HaveObjectForHash(inv.hash)) {
|
|
ss.reserve(1000);
|
|
if (m_govman.SerializeObjectForHash(inv.hash, ss)) {
|
|
topush = true;
|
|
}
|
|
}
|
|
if (topush) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::MNGOVERNANCEOBJECT, ss));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && inv.type == MSG_GOVERNANCE_OBJECT_VOTE) {
|
|
CDataStream ss(SER_NETWORK, pfrom.GetCommonVersion());
|
|
bool topush = false;
|
|
if (m_govman.HaveVoteForHash(inv.hash)) {
|
|
ss.reserve(1000);
|
|
if (m_govman.SerializeVoteForHash(inv.hash, ss)) {
|
|
topush = true;
|
|
}
|
|
}
|
|
if (topush) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::MNGOVERNANCEOBJECTVOTE, ss));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && (inv.type == MSG_QUORUM_FINAL_COMMITMENT)) {
|
|
llmq::CFinalCommitment o;
|
|
if (m_llmq_ctx->quorum_block_processor->GetMineableCommitmentByHash(
|
|
inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QFCOMMITMENT, o));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && (inv.type == MSG_QUORUM_CONTRIB)) {
|
|
llmq::CDKGContribution o;
|
|
if (m_llmq_ctx->qdkgsman->GetContribution(inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QCONTRIB, o));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && (inv.type == MSG_QUORUM_COMPLAINT)) {
|
|
llmq::CDKGComplaint o;
|
|
if (m_llmq_ctx->qdkgsman->GetComplaint(inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QCOMPLAINT, o));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && (inv.type == MSG_QUORUM_JUSTIFICATION)) {
|
|
llmq::CDKGJustification o;
|
|
if (m_llmq_ctx->qdkgsman->GetJustification(inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QJUSTIFICATION, o));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && (inv.type == MSG_QUORUM_PREMATURE_COMMITMENT)) {
|
|
llmq::CDKGPrematureCommitment o;
|
|
if (m_llmq_ctx->qdkgsman->GetPrematureCommitment(inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QPCOMMITMENT, o));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && (inv.type == MSG_QUORUM_RECOVERED_SIG)) {
|
|
llmq::CRecoveredSig o;
|
|
if (m_llmq_ctx->sigman->GetRecoveredSigForGetData(inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QSIGREC, o));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && (inv.type == MSG_CLSIG)) {
|
|
llmq::CChainLockSig o;
|
|
if (m_llmq_ctx->clhandler->GetChainLockByHash(inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::CLSIG, o));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push && inv.type == MSG_ISDLOCK) {
|
|
llmq::CInstantSendLock o;
|
|
if (m_llmq_ctx->isman->GetInstantSendLockByHash(inv.hash, o)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::ISDLOCK, o));
|
|
push = true;
|
|
}
|
|
}
|
|
if (!push && inv.type == MSG_DSQ) {
|
|
auto opt_dsq = m_cj_ctx->server->GetQueueFromHash(inv.hash);
|
|
#ifdef ENABLE_WALLET
|
|
if (!opt_dsq.has_value()) {
|
|
opt_dsq = m_cj_ctx->queueman->GetQueueFromHash(inv.hash);
|
|
}
|
|
#endif
|
|
if (opt_dsq.has_value()) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::DSQUEUE, *opt_dsq));
|
|
push = true;
|
|
}
|
|
}
|
|
|
|
if (!push) {
|
|
vNotFound.push_back(inv);
|
|
}
|
|
}
|
|
|
|
// Only process one BLOCK item per call, since they're uncommon and can be
|
|
// expensive to process.
|
|
if (it != peer.m_getdata_requests.end() && !pfrom.fPauseSend) {
|
|
const CInv &inv = *it++;
|
|
if (inv.IsGenBlkMsg()) {
|
|
ProcessGetBlockData(pfrom, peer, inv, *m_llmq_ctx->isman);
|
|
}
|
|
// else: If the first item on the queue is an unknown type, we erase it
|
|
// and continue processing the queue on the next call.
|
|
}
|
|
|
|
peer.m_getdata_requests.erase(peer.m_getdata_requests.begin(), it);
|
|
|
|
if (!vNotFound.empty()) {
|
|
// Let the peer know that we didn't find what it asked for, so it doesn't
|
|
// have to wait around forever.
|
|
// SPV clients care about this message: it's needed when they are
|
|
// recursively walking the dependencies of relevant unconfirmed
|
|
// transactions. SPV clients want to do that because they want to know
|
|
// about (and store and rebroadcast and risk analyze) the dependencies
|
|
// of transactions relevant to them, without having to download the
|
|
// entire memory pool.
|
|
// Also, other nodes can use these messages to automatically request a
|
|
// transaction from some other peer that annnounced it, and stop
|
|
// waiting for us to respond.
|
|
// In normal operation, we often send NOTFOUND messages for parents of
|
|
// transactions that we relay; if a peer is missing a parent, they may
|
|
// assume we have them and request the parents from us.
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::NOTFOUND, vNotFound));
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::SendBlockTransactions(CNode& pfrom, const CBlock& block, const BlockTransactionsRequest& req) {
|
|
BlockTransactions resp(req);
|
|
for (size_t i = 0; i < req.indexes.size(); i++) {
|
|
if (req.indexes[i] >= block.vtx.size()) {
|
|
Misbehaving(pfrom.GetId(), 100, "getblocktxn with out-of-bounds tx indices");
|
|
return;
|
|
}
|
|
resp.txn[i] = block.vtx[req.indexes[i]];
|
|
}
|
|
CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::BLOCKTXN, resp));
|
|
}
|
|
|
|
/**
|
|
* Special handling for unconnecting headers that might be part of a block
|
|
* announcement.
|
|
*
|
|
* We'll send a getheaders message in response to try to connect the chain.
|
|
*
|
|
* The peer can send up to MAX_UNCONNECTING_HEADERS in a row that
|
|
* don't connect before given DoS points.
|
|
*
|
|
* Once a headers message is received that is valid and does connect,
|
|
* nUnconnectingHeaders gets reset back to 0.
|
|
*/
|
|
void PeerManagerImpl::HandleFewUnconnectingHeaders(CNode& pfrom, Peer& peer,
|
|
const std::vector<CBlockHeader>& headers)
|
|
{
|
|
LOCK(cs_main);
|
|
CNodeState *nodestate = State(pfrom.GetId());
|
|
|
|
nodestate->nUnconnectingHeaders++;
|
|
// Try to fill in the missing headers.
|
|
std::string msg_type = UsesCompressedHeaders(peer) ? NetMsgType::GETHEADERS2 : NetMsgType::GETHEADERS;
|
|
if (MaybeSendGetHeaders(pfrom, msg_type, m_chainman.ActiveChain().GetLocator(m_chainman.m_best_header), peer)) {
|
|
LogPrint(BCLog::NET, "received header %s: missing prev block %s, sending %s (%d) to end (peer=%d, nUnconnectingHeaders=%d)\n",
|
|
headers[0].GetHash().ToString(),
|
|
headers[0].hashPrevBlock.ToString(),
|
|
msg_type,
|
|
m_chainman.m_best_header->nHeight,
|
|
pfrom.GetId(), nodestate->nUnconnectingHeaders);
|
|
}
|
|
// Set hashLastUnknownBlock for this peer, so that if we
|
|
// eventually get the headers - even from a different peer -
|
|
// we can use this peer to download.
|
|
UpdateBlockAvailability(pfrom.GetId(), headers.back().GetHash());
|
|
|
|
// The peer may just be broken, so periodically assign DoS points if this
|
|
// condition persists.
|
|
if (nodestate->nUnconnectingHeaders % MAX_UNCONNECTING_HEADERS == 0) {
|
|
Misbehaving(pfrom.GetId(), 20, strprintf("%d non-connecting headers", nodestate->nUnconnectingHeaders));
|
|
}
|
|
}
|
|
|
|
bool PeerManagerImpl::CheckHeadersAreContinuous(const std::vector<CBlockHeader>& headers) const
|
|
{
|
|
uint256 hashLastBlock;
|
|
for (const CBlockHeader& header : headers) {
|
|
if (!hashLastBlock.IsNull() && header.hashPrevBlock != hashLastBlock) {
|
|
return false;
|
|
}
|
|
hashLastBlock = header.GetHash();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool PeerManagerImpl::MaybeSendGetHeaders(CNode& pfrom, const std::string& msg_type, const CBlockLocator& locator, Peer& peer)
|
|
{
|
|
assert(msg_type == NetMsgType::GETHEADERS || msg_type == NetMsgType::GETHEADERS2);
|
|
|
|
const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
|
|
|
|
const auto current_time = GetTime<std::chrono::seconds>();
|
|
// Only allow a new getheaders message to go out if we don't have a recent
|
|
// one already in-flight
|
|
if (peer.m_last_getheaders_timestamp.load() < current_time - HEADERS_RESPONSE_TIME) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(msg_type, locator, uint256()));
|
|
peer.m_last_getheaders_timestamp = current_time;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Given a new headers tip ending in pindexLast, potentially request blocks towards that tip.
|
|
* We require that the given tip have at least as much work as our tip, and for
|
|
* our current tip to be "close to synced" (see CanDirectFetch()).
|
|
*/
|
|
void PeerManagerImpl::HeadersDirectFetchBlocks(CNode& pfrom, const Peer& peer, const CBlockIndex* pindexLast)
|
|
{
|
|
const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
|
|
|
|
LOCK(cs_main);
|
|
CNodeState *nodestate = State(pfrom.GetId());
|
|
|
|
if (CanDirectFetch() && pindexLast->IsValid(BLOCK_VALID_TREE) && m_chainman.ActiveChain().Tip()->nChainWork <= pindexLast->nChainWork) {
|
|
|
|
std::vector<const CBlockIndex*> vToFetch;
|
|
const CBlockIndex *pindexWalk = pindexLast;
|
|
// Calculate all the blocks we'd need to switch to pindexLast, up to a limit.
|
|
while (pindexWalk && !m_chainman.ActiveChain().Contains(pindexWalk) && vToFetch.size() <= MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
|
|
if (!(pindexWalk->nStatus & BLOCK_HAVE_DATA) &&
|
|
!IsBlockRequested(pindexWalk->GetBlockHash())) {
|
|
// We don't have this block, and it's not yet in flight.
|
|
vToFetch.push_back(pindexWalk);
|
|
}
|
|
pindexWalk = pindexWalk->pprev;
|
|
}
|
|
// If pindexWalk still isn't on our main chain, we're looking at a
|
|
// very large reorg at a time we think we're close to caught up to
|
|
// the main chain -- this shouldn't really happen. Bail out on the
|
|
// direct fetch and rely on parallel download instead.
|
|
if (!m_chainman.ActiveChain().Contains(pindexWalk)) {
|
|
LogPrint(BCLog::NET, "Large reorg, won't direct fetch to %s (%d)\n",
|
|
pindexLast->GetBlockHash().ToString(),
|
|
pindexLast->nHeight);
|
|
} else {
|
|
std::vector<CInv> vGetData;
|
|
// Download as much as possible, from earliest to latest.
|
|
for (const CBlockIndex *pindex : reverse_iterate(vToFetch)) {
|
|
if (nodestate->nBlocksInFlight >= MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
|
|
// Can't download any more from this peer
|
|
break;
|
|
}
|
|
vGetData.push_back(CInv(MSG_BLOCK, pindex->GetBlockHash()));
|
|
BlockRequested(pfrom.GetId(), *pindex);
|
|
LogPrint(BCLog::NET, "Requesting block %s from peer=%d\n",
|
|
pindex->GetBlockHash().ToString(), pfrom.GetId());
|
|
}
|
|
if (vGetData.size() > 1) {
|
|
LogPrint(BCLog::NET, "Downloading blocks toward %s (%d) via headers direct fetch\n",
|
|
pindexLast->GetBlockHash().ToString(), pindexLast->nHeight);
|
|
}
|
|
if (vGetData.size() > 0) {
|
|
if (!m_ignore_incoming_txs &&
|
|
nodestate->m_provides_cmpctblocks &&
|
|
vGetData.size() == 1 &&
|
|
mapBlocksInFlight.size() == 1 &&
|
|
pindexLast->pprev->IsValid(BLOCK_VALID_CHAIN)) {
|
|
// In any case, we want to download using a compact block, not a regular one
|
|
vGetData[0] = CInv(MSG_CMPCT_BLOCK, vGetData[0].hash);
|
|
}
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::GETDATA, vGetData));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Given receipt of headers from a peer ending in pindexLast, along with
|
|
* whether that header was new and whether the headers message was full,
|
|
* update the state we keep for the peer.
|
|
*/
|
|
void PeerManagerImpl::UpdatePeerStateForReceivedHeaders(CNode& pfrom,
|
|
const CBlockIndex *pindexLast, bool received_new_header, bool may_have_more_headers)
|
|
{
|
|
LOCK(cs_main);
|
|
CNodeState *nodestate = State(pfrom.GetId());
|
|
if (nodestate->nUnconnectingHeaders > 0) {
|
|
LogPrint(BCLog::NET, "peer=%d: resetting nUnconnectingHeaders (%d -> 0)\n", pfrom.GetId(), nodestate->nUnconnectingHeaders);
|
|
}
|
|
nodestate->nUnconnectingHeaders = 0;
|
|
|
|
assert(pindexLast);
|
|
UpdateBlockAvailability(pfrom.GetId(), pindexLast->GetBlockHash());
|
|
|
|
// From here, pindexBestKnownBlock should be guaranteed to be non-null,
|
|
// because it is set in UpdateBlockAvailability. Some nullptr checks
|
|
// are still present, however, as belt-and-suspenders.
|
|
|
|
if (received_new_header && pindexLast->nChainWork > m_chainman.ActiveChain().Tip()->nChainWork) {
|
|
nodestate->m_last_block_announcement = GetTime();
|
|
}
|
|
|
|
// If we're in IBD, we want outbound peers that will serve us a useful
|
|
// chain. Disconnect peers that are on chains with insufficient work.
|
|
if (m_chainman.ActiveChainstate().IsInitialBlockDownload() && !may_have_more_headers) {
|
|
// If the peer has no more headers to give us, then we know we have
|
|
// their tip.
|
|
if (nodestate->pindexBestKnownBlock && nodestate->pindexBestKnownBlock->nChainWork < nMinimumChainWork) {
|
|
// This peer has too little work on their headers chain to help
|
|
// us sync -- disconnect if it is an outbound disconnection
|
|
// candidate.
|
|
// Note: We compare their tip to nMinimumChainWork (rather than
|
|
// m_chainman.ActiveChain().Tip()) because we won't start block download
|
|
// until we have a headers chain that has at least
|
|
// nMinimumChainWork, even if a peer has a chain past our tip,
|
|
// as an anti-DoS measure.
|
|
if (pfrom.IsOutboundOrBlockRelayConn()) {
|
|
LogPrintf("Disconnecting outbound peer %d -- headers chain has insufficient work\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If this is an outbound full-relay peer, check to see if we should protect
|
|
// it from the bad/lagging chain logic.
|
|
// Note that outbound block-relay peers are excluded from this protection, and
|
|
// thus always subject to eviction under the bad/lagging chain logic.
|
|
// See ChainSyncTimeoutState.
|
|
if (!pfrom.fDisconnect && pfrom.IsFullOutboundConn() && nodestate->pindexBestKnownBlock != nullptr) {
|
|
if (m_outbound_peers_with_protect_from_disconnect < MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT && nodestate->pindexBestKnownBlock->nChainWork >= m_chainman.ActiveChain().Tip()->nChainWork && !nodestate->m_chain_sync.m_protect) {
|
|
LogPrint(BCLog::NET, "Protecting outbound peer=%d from eviction\n", pfrom.GetId());
|
|
nodestate->m_chain_sync.m_protect = true;
|
|
++m_outbound_peers_with_protect_from_disconnect;
|
|
}
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessHeadersMessage(CNode& pfrom, Peer& peer,
|
|
const std::vector<CBlockHeader>& headers,
|
|
bool via_compact_block)
|
|
{
|
|
const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
|
|
size_t nCount = headers.size();
|
|
|
|
if (nCount == 0) {
|
|
// Nothing interesting. Stop asking this peers for more headers.
|
|
return;
|
|
}
|
|
|
|
const CBlockIndex *pindexLast = nullptr;
|
|
|
|
// Do these headers connect to something in our block index?
|
|
bool headers_connect_blockindex{WITH_LOCK(::cs_main, return m_chainman.m_blockman.LookupBlockIndex(headers[0].hashPrevBlock) != nullptr)};
|
|
|
|
if (!headers_connect_blockindex) {
|
|
if (nCount <= MAX_BLOCKS_TO_ANNOUNCE) {
|
|
// If this looks like it could be a BIP 130 block announcement, use
|
|
// special logic for handling headers that don't connect, as this
|
|
// could be benign.
|
|
HandleFewUnconnectingHeaders(pfrom, peer, headers);
|
|
} else {
|
|
Misbehaving(pfrom.GetId(), 10, "invalid header received");
|
|
}
|
|
return;
|
|
}
|
|
|
|
// At this point, the headers connect to something in our block index.
|
|
if (!CheckHeadersAreContinuous(headers)) {
|
|
Misbehaving(pfrom.GetId(), 20, "non-continuous headers sequence");
|
|
return;
|
|
}
|
|
|
|
// If we don't have the last header, then this peer will have given us
|
|
// something new (if these headers are valid).
|
|
bool received_new_header{WITH_LOCK(::cs_main, return m_chainman.m_blockman.LookupBlockIndex(headers.back().GetHash()) == nullptr)};
|
|
|
|
BlockValidationState state;
|
|
if (!m_chainman.ProcessNewBlockHeaders(headers, state, m_chainparams, &pindexLast)) {
|
|
if (state.IsInvalid()) {
|
|
MaybePunishNodeForBlock(pfrom.GetId(), state, via_compact_block, "invalid header received");
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Consider fetching more headers.
|
|
const bool uses_compressed = UsesCompressedHeaders(peer);
|
|
const std::string msg_type = uses_compressed ? NetMsgType::GETHEADERS2 : NetMsgType::GETHEADERS;
|
|
if (nCount == GetHeadersLimit(pfrom, uses_compressed)) {
|
|
// Headers message had its maximum size; the peer may have more headers.
|
|
if (MaybeSendGetHeaders(pfrom, msg_type, m_chainman.ActiveChain().GetLocator(pindexLast), peer)) {
|
|
LogPrint(BCLog::NET, "more %s (%d) to end to peer=%d (startheight:%d)\n",
|
|
msg_type, pindexLast->nHeight, pfrom.GetId(), peer.m_starting_height);
|
|
}
|
|
}
|
|
|
|
UpdatePeerStateForReceivedHeaders(pfrom, pindexLast, received_new_header, nCount == GetHeadersLimit(pfrom, uses_compressed));
|
|
|
|
// Consider immediately downloading blocks.
|
|
HeadersDirectFetchBlocks(pfrom, peer, pindexLast);
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Reconsider orphan transactions after a parent has been accepted to the mempool.
|
|
*
|
|
* @param[in,out] orphan_work_set The set of orphan transactions to reconsider. Generally only one
|
|
* orphan will be reconsidered on each call of this function. This set
|
|
* may be added to if accepting an orphan causes its children to be
|
|
* reconsidered.
|
|
*/
|
|
void PeerManagerImpl::ProcessOrphanTx(std::set<uint256>& orphan_work_set)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
AssertLockHeld(g_cs_orphans);
|
|
|
|
while (!orphan_work_set.empty()) {
|
|
const uint256 orphanHash = *orphan_work_set.begin();
|
|
orphan_work_set.erase(orphan_work_set.begin());
|
|
|
|
const auto [porphanTx, from_peer] = m_orphanage.GetTx(orphanHash);
|
|
if (porphanTx == nullptr) continue;
|
|
|
|
const MempoolAcceptResult result = m_chainman.ProcessTransaction(porphanTx);
|
|
const TxValidationState& state = result.m_state;
|
|
|
|
if (result.m_result_type == MempoolAcceptResult::ResultType::VALID) {
|
|
LogPrint(BCLog::MEMPOOL, " accepted orphan tx %s\n", orphanHash.ToString());
|
|
RelayTransaction(porphanTx->GetHash());
|
|
m_orphanage.AddChildrenToWorkSet(*porphanTx, orphan_work_set);
|
|
m_orphanage.EraseTx(orphanHash);
|
|
break;
|
|
} else if (state.GetResult() != TxValidationResult::TX_MISSING_INPUTS) {
|
|
if (state.IsInvalid()) {
|
|
LogPrint(BCLog::MEMPOOL, " invalid orphan tx %s from peer=%d. %s\n",
|
|
orphanHash.ToString(),
|
|
from_peer,
|
|
state.ToString());
|
|
// Maybe punish peer that gave us an invalid orphan tx
|
|
MaybePunishNodeForTx(from_peer, state);
|
|
}
|
|
// Has inputs but not accepted to mempool
|
|
// Probably non-standard or insufficient fee
|
|
LogPrint(BCLog::MEMPOOL, " removed orphan tx %s\n", orphanHash.ToString());
|
|
m_recent_rejects.insert(orphanHash);
|
|
m_orphanage.EraseTx(orphanHash);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool PeerManagerImpl::PrepareBlockFilterRequest(CNode& node, Peer& peer,
|
|
BlockFilterType filter_type, uint32_t start_height,
|
|
const uint256& stop_hash, uint32_t max_height_diff,
|
|
const CBlockIndex*& stop_index,
|
|
BlockFilterIndex*& filter_index)
|
|
{
|
|
const bool supported_filter_type =
|
|
(filter_type == BlockFilterType::BASIC_FILTER &&
|
|
(peer.m_our_services & NODE_COMPACT_FILTERS));
|
|
if (!supported_filter_type) {
|
|
LogPrint(BCLog::NET, "peer %d requested unsupported block filter type: %d\n",
|
|
node.GetId(), static_cast<uint8_t>(filter_type));
|
|
node.fDisconnect = true;
|
|
return false;
|
|
}
|
|
|
|
{
|
|
LOCK(cs_main);
|
|
stop_index = m_chainman.m_blockman.LookupBlockIndex(stop_hash);
|
|
|
|
// Check that the stop block exists and the peer would be allowed to fetch it.
|
|
if (!stop_index || !BlockRequestAllowed(stop_index)) {
|
|
LogPrint(BCLog::NET, "peer %d requested invalid block hash: %s\n",
|
|
node.GetId(), stop_hash.ToString());
|
|
node.fDisconnect = true;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
uint32_t stop_height = stop_index->nHeight;
|
|
if (start_height > stop_height) {
|
|
LogPrint(BCLog::NET, "peer %d sent invalid getcfilters/getcfheaders with " /* Continued */
|
|
"start height %d and stop height %d\n",
|
|
node.GetId(), start_height, stop_height);
|
|
node.fDisconnect = true;
|
|
return false;
|
|
}
|
|
if (stop_height - start_height >= max_height_diff) {
|
|
LogPrint(BCLog::NET, "peer %d requested too many cfilters/cfheaders: %d / %d\n",
|
|
node.GetId(), stop_height - start_height + 1, max_height_diff);
|
|
node.fDisconnect = true;
|
|
return false;
|
|
}
|
|
|
|
filter_index = GetBlockFilterIndex(filter_type);
|
|
if (!filter_index) {
|
|
LogPrint(BCLog::NET, "Filter index for supported type %s not found\n", BlockFilterTypeName(filter_type));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessGetCFilters(CNode& node,Peer& peer, CDataStream& vRecv)
|
|
{
|
|
uint8_t filter_type_ser;
|
|
uint32_t start_height;
|
|
uint256 stop_hash;
|
|
|
|
vRecv >> filter_type_ser >> start_height >> stop_hash;
|
|
|
|
const BlockFilterType filter_type = static_cast<BlockFilterType>(filter_type_ser);
|
|
|
|
const CBlockIndex* stop_index;
|
|
BlockFilterIndex* filter_index;
|
|
if (!PrepareBlockFilterRequest(node, peer, filter_type, start_height, stop_hash,
|
|
MAX_GETCFILTERS_SIZE, stop_index, filter_index)) {
|
|
return;
|
|
}
|
|
|
|
std::vector<BlockFilter> filters;
|
|
if (!filter_index->LookupFilterRange(start_height, stop_index, filters)) {
|
|
LogPrint(BCLog::NET, "Failed to find block filter in index: filter_type=%s, start_height=%d, stop_hash=%s\n",
|
|
BlockFilterTypeName(filter_type), start_height, stop_hash.ToString());
|
|
return;
|
|
}
|
|
|
|
for (const auto& filter : filters) {
|
|
CSerializedNetMsg msg = CNetMsgMaker(node.GetCommonVersion())
|
|
.Make(NetMsgType::CFILTER, filter);
|
|
m_connman.PushMessage(&node, std::move(msg));
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessGetCFHeaders(CNode& node, Peer& peer, CDataStream& vRecv)
|
|
{
|
|
uint8_t filter_type_ser;
|
|
uint32_t start_height;
|
|
uint256 stop_hash;
|
|
|
|
vRecv >> filter_type_ser >> start_height >> stop_hash;
|
|
|
|
const BlockFilterType filter_type = static_cast<BlockFilterType>(filter_type_ser);
|
|
|
|
const CBlockIndex* stop_index;
|
|
BlockFilterIndex* filter_index;
|
|
if (!PrepareBlockFilterRequest(node, peer, filter_type, start_height, stop_hash,
|
|
MAX_GETCFHEADERS_SIZE, stop_index, filter_index)) {
|
|
return;
|
|
}
|
|
|
|
uint256 prev_header;
|
|
if (start_height > 0) {
|
|
const CBlockIndex* const prev_block =
|
|
stop_index->GetAncestor(static_cast<int>(start_height - 1));
|
|
if (!filter_index->LookupFilterHeader(prev_block, prev_header)) {
|
|
LogPrint(BCLog::NET, "Failed to find block filter header in index: filter_type=%s, block_hash=%s\n",
|
|
BlockFilterTypeName(filter_type), prev_block->GetBlockHash().ToString());
|
|
return;
|
|
}
|
|
}
|
|
|
|
std::vector<uint256> filter_hashes;
|
|
if (!filter_index->LookupFilterHashRange(start_height, stop_index, filter_hashes)) {
|
|
LogPrint(BCLog::NET, "Failed to find block filter hashes in index: filter_type=%s, start_height=%d, stop_hash=%s\n",
|
|
BlockFilterTypeName(filter_type), start_height, stop_hash.ToString());
|
|
return;
|
|
}
|
|
|
|
CSerializedNetMsg msg = CNetMsgMaker(node.GetCommonVersion())
|
|
.Make(NetMsgType::CFHEADERS,
|
|
filter_type_ser,
|
|
stop_index->GetBlockHash(),
|
|
prev_header,
|
|
filter_hashes);
|
|
m_connman.PushMessage(&node, std::move(msg));
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessGetCFCheckPt(CNode& node, Peer& peer, CDataStream& vRecv)
|
|
{
|
|
uint8_t filter_type_ser;
|
|
uint256 stop_hash;
|
|
|
|
vRecv >> filter_type_ser >> stop_hash;
|
|
|
|
const BlockFilterType filter_type = static_cast<BlockFilterType>(filter_type_ser);
|
|
|
|
const CBlockIndex* stop_index;
|
|
BlockFilterIndex* filter_index;
|
|
if (!PrepareBlockFilterRequest(node, peer, filter_type, /*start_height=*/0, stop_hash,
|
|
/*max_height_diff=*/std::numeric_limits<uint32_t>::max(),
|
|
stop_index, filter_index)) {
|
|
return;
|
|
}
|
|
|
|
std::vector<uint256> headers(stop_index->nHeight / CFCHECKPT_INTERVAL);
|
|
|
|
// Populate headers.
|
|
const CBlockIndex* block_index = stop_index;
|
|
for (int i = headers.size() - 1; i >= 0; i--) {
|
|
int height = (i + 1) * CFCHECKPT_INTERVAL;
|
|
block_index = block_index->GetAncestor(height);
|
|
|
|
if (!filter_index->LookupFilterHeader(block_index, headers[i])) {
|
|
LogPrint(BCLog::NET, "Failed to find block filter header in index: filter_type=%s, block_hash=%s\n",
|
|
BlockFilterTypeName(filter_type), block_index->GetBlockHash().ToString());
|
|
return;
|
|
}
|
|
}
|
|
|
|
CSerializedNetMsg msg = CNetMsgMaker(node.GetCommonVersion())
|
|
.Make(NetMsgType::CFCHECKPT,
|
|
filter_type_ser,
|
|
stop_index->GetBlockHash(),
|
|
headers);
|
|
m_connman.PushMessage(&node, std::move(msg));
|
|
}
|
|
|
|
std::pair<bool /*ret*/, bool /*do_return*/> static ValidateDSTX(CDeterministicMNManager& dmnman, CDSTXManager& dstxman, ChainstateManager& chainman,
|
|
CMasternodeMetaMan& mn_metaman, CTxMemPool& mempool, CCoinJoinBroadcastTx& dstx, uint256 hashTx)
|
|
{
|
|
assert(mn_metaman.IsValid());
|
|
|
|
if (!dstx.IsValidStructure()) {
|
|
LogPrint(BCLog::COINJOIN, "DSTX -- Invalid DSTX structure: %s\n", hashTx.ToString());
|
|
return {false, true};
|
|
}
|
|
if (dstxman.GetDSTX(hashTx)) {
|
|
LogPrint(BCLog::COINJOIN, "DSTX -- Already have %s, skipping...\n", hashTx.ToString());
|
|
return {true, true}; // not an error
|
|
}
|
|
|
|
const CBlockIndex* pindex{nullptr};
|
|
CDeterministicMNCPtr dmn{nullptr};
|
|
{
|
|
LOCK(cs_main);
|
|
pindex = chainman.ActiveChain().Tip();
|
|
}
|
|
// It could be that a MN is no longer in the list but its DSTX is not yet mined.
|
|
// Try to find a MN up to 24 blocks deep to make sure such dstx-es are relayed and processed correctly.
|
|
if (dstx.masternodeOutpoint.IsNull()) {
|
|
for (int i = 0; i < 24 && pindex; ++i) {
|
|
dmn = dmnman.GetListForBlock(pindex).GetMN(dstx.m_protxHash);
|
|
if (dmn) {
|
|
dstx.masternodeOutpoint = dmn->collateralOutpoint;
|
|
break;
|
|
}
|
|
pindex = pindex->pprev;
|
|
}
|
|
} else {
|
|
for (int i = 0; i < 24 && pindex; ++i) {
|
|
dmn = dmnman.GetListForBlock(pindex).GetMNByCollateral(dstx.masternodeOutpoint);
|
|
if (dmn) {
|
|
dstx.m_protxHash = dmn->proTxHash;
|
|
break;
|
|
}
|
|
pindex = pindex->pprev;
|
|
}
|
|
}
|
|
|
|
if (!dmn) {
|
|
LogPrint(BCLog::COINJOIN, "DSTX -- Can't find masternode %s to verify %s\n", dstx.masternodeOutpoint.ToStringShort(), hashTx.ToString());
|
|
return {false, true};
|
|
}
|
|
|
|
if (!mn_metaman.GetMetaInfo(dmn->proTxHash)->IsValidForMixingTxes()) {
|
|
LogPrint(BCLog::COINJOIN, "DSTX -- Masternode %s is sending too many transactions %s\n", dstx.masternodeOutpoint.ToStringShort(), hashTx.ToString());
|
|
return {true, true};
|
|
// TODO: Not an error? Could it be that someone is relaying old DSTXes
|
|
// we have no idea about (e.g we were offline)? How to handle them?
|
|
}
|
|
|
|
if (!dstx.CheckSignature(dmn->pdmnState->pubKeyOperator.Get())) {
|
|
LogPrint(BCLog::COINJOIN, "DSTX -- CheckSignature() failed for %s\n", hashTx.ToString());
|
|
return {false, true};
|
|
}
|
|
|
|
LogPrint(BCLog::COINJOIN, "DSTX -- Got Masternode transaction %s\n", hashTx.ToString());
|
|
mempool.PrioritiseTransaction(hashTx, 0.1*COIN);
|
|
mn_metaman.DisallowMixing(dmn->proTxHash);
|
|
|
|
return {true, false};
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessBlock(CNode& node, const std::shared_ptr<const CBlock>& block, bool force_processing)
|
|
{
|
|
bool new_block{false};
|
|
m_chainman.ProcessNewBlock(m_chainparams, block, force_processing, &new_block);
|
|
if (new_block) {
|
|
node.m_last_block_time = GetTime<std::chrono::seconds>();
|
|
} else {
|
|
LOCK(cs_main);
|
|
mapBlockSource.erase(block->GetHash());
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessPeerMsgRet(const PeerMsgRet& ret, CNode& pfrom)
|
|
{
|
|
if (!ret) Misbehaving(pfrom.GetId(), ret.error().score, ret.error().message);
|
|
}
|
|
|
|
void PeerManagerImpl::PostProcessMessage(MessageProcessingResult&& result, NodeId node)
|
|
{
|
|
if (result.m_error) {
|
|
Misbehaving(node, result.m_error->score, result.m_error->message);
|
|
}
|
|
if (result.m_to_erase) {
|
|
WITH_LOCK(cs_main, EraseObjectRequest(node, result.m_to_erase.value()));
|
|
}
|
|
for (const auto& tx : result.m_transactions) {
|
|
WITH_LOCK(cs_main, RelayTransaction(tx));
|
|
}
|
|
if (result.m_inventory) {
|
|
RelayInv(result.m_inventory.value(), MIN_PEER_PROTO_VERSION);
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::ProcessMessage(
|
|
CNode& pfrom,
|
|
const std::string& msg_type,
|
|
CDataStream& vRecv,
|
|
const std::chrono::microseconds time_received,
|
|
const std::atomic<bool>& interruptMsgProc)
|
|
{
|
|
AssertLockHeld(g_msgproc_mutex);
|
|
|
|
LogPrint(BCLog::NET, "received: %s (%u bytes) peer=%d\n", SanitizeString(msg_type), vRecv.size(), pfrom.GetId());
|
|
::g_stats_client->inc("message.received." + SanitizeString(msg_type), 1.0f);
|
|
|
|
const bool is_masternode = m_mn_activeman != nullptr;
|
|
|
|
PeerRef peer = GetPeerRef(pfrom.GetId());
|
|
if (peer == nullptr) return;
|
|
|
|
if (msg_type == NetMsgType::VERSION) {
|
|
if (pfrom.nVersion != 0) {
|
|
LogPrint(BCLog::NET, "redundant version message from peer=%d\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
int64_t nTime;
|
|
CService addrMe;
|
|
uint64_t nNonce = 1;
|
|
ServiceFlags nServices;
|
|
int nVersion;
|
|
std::string cleanSubVer;
|
|
int starting_height = -1;
|
|
bool fRelay = true;
|
|
|
|
vRecv >> nVersion >> Using<CustomUintFormatter<8>>(nServices) >> nTime;
|
|
if (nTime < 0) {
|
|
nTime = 0;
|
|
}
|
|
vRecv.ignore(8); // Ignore the addrMe service bits sent by the peer
|
|
vRecv >> addrMe;
|
|
if (!pfrom.IsInboundConn())
|
|
{
|
|
m_addrman.SetServices(pfrom.addr, nServices);
|
|
}
|
|
if (pfrom.ExpectServicesFromConn() && !HasAllDesirableServiceFlags(nServices))
|
|
{
|
|
LogPrint(BCLog::NET, "peer=%d does not offer the expected services (%08x offered, %08x expected); disconnecting\n", pfrom.GetId(), nServices, GetDesirableServiceFlags(nServices));
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
if (nVersion < MIN_PEER_PROTO_VERSION) {
|
|
// disconnect from peers older than this proto version
|
|
LogPrint(BCLog::NET, "peer=%d using obsolete version %i; disconnecting\n", pfrom.GetId(), nVersion);
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
if (!vRecv.empty()) {
|
|
// The version message includes information about the sending node which we don't use:
|
|
// - 8 bytes (service bits)
|
|
// - 16 bytes (ipv6 address)
|
|
// - 2 bytes (port)
|
|
vRecv.ignore(26);
|
|
vRecv >> nNonce;
|
|
}
|
|
if (!vRecv.empty()) {
|
|
std::string strSubVer;
|
|
vRecv >> LIMITED_STRING(strSubVer, MAX_SUBVERSION_LENGTH);
|
|
cleanSubVer = SanitizeString(strSubVer);
|
|
}
|
|
if (!vRecv.empty()) {
|
|
vRecv >> starting_height;
|
|
}
|
|
if (!vRecv.empty())
|
|
vRecv >> fRelay;
|
|
if (!vRecv.empty()) {
|
|
uint256 receivedMNAuthChallenge;
|
|
vRecv >> receivedMNAuthChallenge;
|
|
pfrom.SetReceivedMNAuthChallenge(receivedMNAuthChallenge);
|
|
}
|
|
if (!vRecv.empty()) {
|
|
bool fOtherMasternode = false;
|
|
vRecv >> fOtherMasternode;
|
|
if (pfrom.IsInboundConn()) {
|
|
pfrom.m_masternode_connection = fOtherMasternode;
|
|
if (fOtherMasternode) {
|
|
LogPrint(BCLog::NET_NETCONN, "peer=%d is an inbound masternode connection, not relaying anything to it\n", pfrom.GetId());
|
|
if (!is_masternode) {
|
|
LogPrint(BCLog::NET_NETCONN, "but we're not a masternode, disconnecting\n");
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Disconnect if we connected to ourself
|
|
if (pfrom.IsInboundConn() && !m_connman.CheckIncomingNonce(nNonce))
|
|
{
|
|
LogPrintf("connected to self at %s, disconnecting\n", pfrom.addr.ToStringAddrPort());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
if (pfrom.IsInboundConn() && addrMe.IsRoutable())
|
|
{
|
|
SeenLocal(addrMe);
|
|
}
|
|
|
|
// Be shy and don't send version until we hear
|
|
if (pfrom.IsInboundConn()) {
|
|
PushNodeVersion(pfrom, *peer);
|
|
}
|
|
|
|
if (Params().NetworkIDString() == CBaseChainParams::DEVNET) {
|
|
if (cleanSubVer.find(strprintf("devnet.%s", gArgs.GetDevNetName())) == std::string::npos) {
|
|
LogPrintf("connected to wrong devnet. Reported version is %s, expected devnet name is %s\n", cleanSubVer, gArgs.GetDevNetName());
|
|
if (!pfrom.IsInboundConn())
|
|
Misbehaving(pfrom.GetId(), 100); // don't try to connect again
|
|
else
|
|
Misbehaving(pfrom.GetId(), 1); // whover connected, might just have made a mistake, don't ban him immediately
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Change version
|
|
const int greatest_common_version = std::min(nVersion, PROTOCOL_VERSION);
|
|
pfrom.SetCommonVersion(greatest_common_version);
|
|
pfrom.nVersion = nVersion;
|
|
|
|
const CNetMsgMaker msg_maker(greatest_common_version);
|
|
// Signal ADDRv2 support (BIP155).
|
|
if (greatest_common_version >= ADDRV2_PROTO_VERSION) {
|
|
// BIP155 defines addrv2 and sendaddrv2 for all protocol versions, but some
|
|
// implementations reject messages they don't know. As a courtesy, don't send
|
|
// it to nodes with a version before ADDRV2_PROTO_VERSION.
|
|
m_connman.PushMessage(&pfrom, msg_maker.Make(NetMsgType::SENDADDRV2));
|
|
}
|
|
|
|
pfrom.m_has_all_wanted_services = HasAllDesirableServiceFlags(nServices);
|
|
peer->m_their_services = nServices;
|
|
pfrom.SetAddrLocal(addrMe);
|
|
{
|
|
LOCK(pfrom.m_subver_mutex);
|
|
pfrom.cleanSubVer = cleanSubVer;
|
|
}
|
|
peer->m_starting_height = starting_height;
|
|
|
|
// We only initialize the m_tx_relay data structure if:
|
|
// - this isn't an outbound block-relay-only connection; and
|
|
// - this isn't an outbound feeler connection, and
|
|
// - fRelay=true or we're offering NODE_BLOOM to this peer
|
|
// (NODE_BLOOM means that the peer may turn on tx relay later)
|
|
if (!pfrom.IsBlockOnlyConn() &&
|
|
!pfrom.IsFeelerConn() &&
|
|
(fRelay || (peer->m_our_services & NODE_BLOOM))) {
|
|
auto* const tx_relay = peer->SetTxRelay();
|
|
{
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
tx_relay->m_relay_txs = fRelay; // set to true after we get the first filter* message
|
|
}
|
|
if (fRelay) pfrom.m_relays_txs = true;
|
|
}
|
|
|
|
if (greatest_common_version >= INCREASE_MAX_HEADERS2_VERSION && m_txreconciliation) {
|
|
// Per BIP-330, we announce txreconciliation support if:
|
|
// - protocol version per the peer's VERSION message supports INCREASE_MAX_HEADERS2_VERSION;
|
|
// - transaction relay is supported per the peer's VERSION message (see m_relays_txs);
|
|
// - this is not a block-relay-only connection and not a feeler (see m_relays_txs);
|
|
// - this is not an addr fetch connection;
|
|
// - we are not in -blocksonly mode.
|
|
if (pfrom.m_relays_txs && !pfrom.IsAddrFetchConn() && !m_ignore_incoming_txs) {
|
|
const uint64_t recon_salt = m_txreconciliation->PreRegisterPeer(pfrom.GetId());
|
|
m_connman.PushMessage(&pfrom, msg_maker.Make(NetMsgType::SENDTXRCNCL,
|
|
TXRECONCILIATION_VERSION, recon_salt));
|
|
}
|
|
}
|
|
|
|
m_connman.PushMessage(&pfrom, msg_maker.Make(NetMsgType::VERACK));
|
|
|
|
// Potentially mark this peer as a preferred download peer.
|
|
{
|
|
LOCK(cs_main);
|
|
CNodeState* state = State(pfrom.GetId());
|
|
state->fPreferredDownload = (!pfrom.IsInboundConn() || pfrom.HasPermission(NetPermissionFlags::NoBan)) && !pfrom.IsAddrFetchConn() && CanServeBlocks(*peer);
|
|
m_num_preferred_download_peers += state->fPreferredDownload;
|
|
}
|
|
|
|
// Self advertisement & GETADDR logic
|
|
if (!pfrom.IsInboundConn() && SetupAddressRelay(pfrom, *peer)) {
|
|
// For outbound peers, we try to relay our address (so that other
|
|
// nodes can try to find us more quickly, as we have no guarantee
|
|
// that an outbound peer is even aware of how to reach us) and do a
|
|
// one-time address fetch (to help populate/update our addrman). If
|
|
// we're starting up for the first time, our addrman may be pretty
|
|
// empty and no one will know who we are, so these mechanisms are
|
|
// important to help us connect to the network.
|
|
//
|
|
// We skip this for block-relay-only peers. We want to avoid
|
|
// potentially leaking addr information and we do not want to
|
|
// indicate to the peer that we will participate in addr relay.
|
|
if (fListen && !m_chainman.ActiveChainstate().IsInitialBlockDownload())
|
|
{
|
|
CAddress addr{GetLocalAddress(pfrom), peer->m_our_services, (uint32_t)GetAdjustedTime()};
|
|
FastRandomContext insecure_rand;
|
|
if (addr.IsRoutable())
|
|
{
|
|
LogPrint(BCLog::NET, "ProcessMessages: advertising address %s\n", addr.ToStringAddrPort());
|
|
PushAddress(*peer, addr, insecure_rand);
|
|
} else if (IsPeerAddrLocalGood(&pfrom)) {
|
|
// Override just the address with whatever the peer sees us as.
|
|
// Leave the port in addr as it was returned by GetLocalAddress()
|
|
// above, as this is an outbound connection and the peer cannot
|
|
// observe our listening port.
|
|
addr.SetIP(addrMe);
|
|
LogPrint(BCLog::NET, "ProcessMessages: advertising address %s\n", addr.ToStringAddrPort());
|
|
PushAddress(*peer, addr, insecure_rand);
|
|
}
|
|
}
|
|
|
|
// Get recent addresses
|
|
m_connman.PushMessage(&pfrom, CNetMsgMaker(greatest_common_version).Make(NetMsgType::GETADDR));
|
|
peer->m_getaddr_sent = true;
|
|
// When requesting a getaddr, accept an additional MAX_ADDR_TO_SEND addresses in response
|
|
// (bypassing the MAX_ADDR_PROCESSING_TOKEN_BUCKET limit).
|
|
peer->m_addr_token_bucket += MAX_ADDR_TO_SEND;
|
|
}
|
|
|
|
if (!pfrom.IsInboundConn()) {
|
|
// For non-inbound connections, we update the addrman to record
|
|
// connection success so that addrman will have an up-to-date
|
|
// notion of which peers are online and available.
|
|
//
|
|
// While we strive to not leak information about block-relay-only
|
|
// connections via the addrman, not moving an address to the tried
|
|
// table is also potentially detrimental because new-table entries
|
|
// are subject to eviction in the event of addrman collisions. We
|
|
// mitigate the information-leak by never calling
|
|
// AddrMan::Connected() on block-relay-only peers; see
|
|
// FinalizeNode().
|
|
//
|
|
// This moves an address from New to Tried table in Addrman,
|
|
// resolves tried-table collisions, etc.
|
|
m_addrman.Good(pfrom.addr);
|
|
}
|
|
|
|
std::string remoteAddr;
|
|
if (fLogIPs)
|
|
remoteAddr = ", peeraddr=" + pfrom.addr.ToStringAddrPort();
|
|
|
|
LogPrint(BCLog::NET, "receive version message: %s: version %d, blocks=%d, us=%s, txrelay=%d, peer=%d%s\n",
|
|
cleanSubVer, pfrom.nVersion,
|
|
peer->m_starting_height, addrMe.ToStringAddrPort(), fRelay, pfrom.GetId(),
|
|
remoteAddr);
|
|
|
|
int64_t nTimeOffset = nTime - GetTime();
|
|
pfrom.nTimeOffset = nTimeOffset;
|
|
AddTimeData(pfrom.addr, nTimeOffset);
|
|
|
|
// Feeler connections exist only to verify if address is online.
|
|
if (pfrom.IsFeelerConn()) {
|
|
LogPrint(BCLog::NET_NETCONN, "feeler connection completed peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (pfrom.nVersion == 0) {
|
|
// Must have a version message before anything else
|
|
LogPrint(BCLog::NET, "non-version message before version handshake. Message \"%s\" from peer=%d\n", SanitizeString(msg_type), pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
// At this point, the outgoing message serialization version can't change.
|
|
const CNetMsgMaker msgMaker(pfrom.GetCommonVersion());
|
|
|
|
if (msg_type == NetMsgType::VERACK) {
|
|
if (pfrom.fSuccessfullyConnected) {
|
|
LogPrint(BCLog::NET, "ignoring redundant verack message from peer=%d\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
// Log succesful connections unconditionally for outbound, but not for inbound as those
|
|
// can be triggered by an attacker at high rate.
|
|
if (!pfrom.IsInboundConn() || LogAcceptCategory(BCLog::NET, BCLog::Level::Debug)) {
|
|
LogPrintf("New %s %s peer connected: version: %d, blocks=%d, peer=%d%s\n",
|
|
pfrom.ConnectionTypeAsString(),
|
|
TransportTypeAsString(pfrom.m_transport->GetInfo().transport_type),
|
|
pfrom.nVersion.load(), peer->m_starting_height,
|
|
pfrom.GetId(), (fLogIPs ? strprintf(", peeraddr=%s", pfrom.addr.ToStringAddrPort()) : ""));
|
|
}
|
|
|
|
if (is_masternode && !pfrom.m_masternode_probe_connection) {
|
|
CMNAuth::PushMNAUTH(pfrom, m_connman, *m_mn_activeman, m_chainman.ActiveChain().Tip());
|
|
}
|
|
|
|
// Tell our peer we prefer to receive headers rather than inv's
|
|
// We send this to non-NODE NETWORK peers as well, because even
|
|
// non-NODE NETWORK peers can announce blocks (such as pruning
|
|
// nodes)
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(UsesCompressedHeaders(*peer) ? NetMsgType::SENDHEADERS2 : NetMsgType::SENDHEADERS));
|
|
|
|
if (pfrom.CanRelay()) {
|
|
// Tell our peer we are willing to provide version 1 cmpctblocks.
|
|
// However, we do not request new block announcements using
|
|
// cmpctblock messages.
|
|
// We send this to non-NODE NETWORK peers as well, because
|
|
// they may wish to request compact blocks from us
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::SENDCMPCT, /*high_bandwidth=*/false, /*version=*/CMPCTBLOCKS_VERSION));
|
|
}
|
|
|
|
if (!RejectIncomingTxs(pfrom)) {
|
|
// Tell our peer that he should send us CoinJoin queue messages
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::SENDDSQUEUE, true));
|
|
// Tell our peer that he should send us intra-quorum messages
|
|
const auto tip_mn_list = Assert(m_dmnman)->GetListAtChainTip();
|
|
if (llmq::IsWatchQuorumsEnabled() && m_connman.IsMasternodeQuorumNode(&pfrom, tip_mn_list)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QWATCH));
|
|
}
|
|
}
|
|
|
|
if (m_txreconciliation) {
|
|
if (pfrom.nVersion < INCREASE_MAX_HEADERS2_VERSION || !m_txreconciliation->IsPeerRegistered(pfrom.GetId())) {
|
|
// We could have optimistically pre-registered/registered the peer. In that case,
|
|
// we should forget about the reconciliation state here if the node version is below
|
|
// our minimum supported version.
|
|
m_txreconciliation->ForgetPeer(pfrom.GetId());
|
|
}
|
|
}
|
|
|
|
pfrom.fSuccessfullyConnected = true;
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::SENDHEADERS) {
|
|
LOCK(cs_main);
|
|
State(pfrom.GetId())->fPreferHeaders = true;
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::SENDHEADERS2) {
|
|
LOCK(cs_main);
|
|
State(pfrom.GetId())->fPreferHeadersCompressed = true;
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::SENDCMPCT) {
|
|
bool sendcmpct_hb{false};
|
|
uint64_t sendcmpct_version{0};
|
|
vRecv >> sendcmpct_hb >> sendcmpct_version;
|
|
|
|
if (sendcmpct_version != CMPCTBLOCKS_VERSION) return;
|
|
|
|
LOCK(cs_main);
|
|
CNodeState *nodestate = State(pfrom.GetId());
|
|
nodestate->m_provides_cmpctblocks = true;
|
|
nodestate->m_requested_hb_cmpctblocks = sendcmpct_hb;
|
|
// save whether peer selects us as BIP152 high-bandwidth peer
|
|
// (receiving sendcmpct(1) signals high-bandwidth, sendcmpct(0) low-bandwidth)
|
|
pfrom.m_bip152_highbandwidth_from = sendcmpct_hb;
|
|
return;
|
|
}
|
|
|
|
// BIP155 defines feature negotiation of addrv2 and sendaddrv2, which must happen
|
|
// between VERSION and VERACK.
|
|
if (msg_type == NetMsgType::SENDADDRV2) {
|
|
if (pfrom.GetCommonVersion() < ADDRV2_PROTO_VERSION) {
|
|
// Ignore previous implementations
|
|
return;
|
|
}
|
|
if (pfrom.fSuccessfullyConnected) {
|
|
// Disconnect peers that send a SENDADDRV2 message after VERACK.
|
|
LogPrint(BCLog::NET_NETCONN, "sendaddrv2 received after verack from peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
peer->m_wants_addrv2 = true;
|
|
return;
|
|
}
|
|
|
|
// Received from a peer demonstrating readiness to announce transactions via reconciliations.
|
|
// This feature negotiation must happen between VERSION and VERACK to avoid relay problems
|
|
// from switching announcement protocols after the connection is up.
|
|
if (msg_type == NetMsgType::SENDTXRCNCL) {
|
|
if (!m_txreconciliation) {
|
|
LogPrint(BCLog::NET, "sendtxrcncl from peer=%d ignored, as our node does not have txreconciliation enabled\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
if (pfrom.fSuccessfullyConnected) {
|
|
LogPrint(BCLog::NET, "sendtxrcncl received after verack from peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
// Peer must not offer us reconciliations if we specified no tx relay support in VERSION.
|
|
if (RejectIncomingTxs(pfrom)) {
|
|
LogPrint(BCLog::NET, "sendtxrcncl received from peer=%d to which we indicated no tx relay; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
// Peer must not offer us reconciliations if they specified no tx relay support in VERSION.
|
|
// This flag might also be false in other cases, but the RejectIncomingTxs check above
|
|
// eliminates them, so that this flag fully represents what we are looking for.
|
|
if (!pfrom.m_relays_txs) {
|
|
LogPrint(BCLog::NET, "sendtxrcncl received from peer=%d which indicated no tx relay to us; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
uint32_t peer_txreconcl_version;
|
|
uint64_t remote_salt;
|
|
vRecv >> peer_txreconcl_version >> remote_salt;
|
|
|
|
const ReconciliationRegisterResult result = m_txreconciliation->RegisterPeer(pfrom.GetId(), pfrom.IsInboundConn(),
|
|
peer_txreconcl_version, remote_salt);
|
|
switch (result) {
|
|
case ReconciliationRegisterResult::NOT_FOUND:
|
|
LogPrint(BCLog::NET, "Ignore unexpected txreconciliation signal from peer=%d\n", pfrom.GetId());
|
|
break;
|
|
case ReconciliationRegisterResult::SUCCESS:
|
|
break;
|
|
case ReconciliationRegisterResult::ALREADY_REGISTERED:
|
|
LogPrint(BCLog::NET, "txreconciliation protocol violation from peer=%d (sendtxrcncl received from already registered peer); disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
case ReconciliationRegisterResult::PROTOCOL_VIOLATION:
|
|
LogPrint(BCLog::NET, "txreconciliation protocol violation from peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!pfrom.fSuccessfullyConnected) {
|
|
LogPrint(BCLog::NET, "Unsupported message \"%s\" prior to verack from peer=%d\n", SanitizeString(msg_type), pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
if (pfrom.nTimeFirstMessageReceived == 0) {
|
|
// First message after VERSION/VERACK
|
|
pfrom.nTimeFirstMessageReceived = GetTimeSeconds();
|
|
pfrom.fFirstMessageIsMNAUTH = msg_type == NetMsgType::MNAUTH;
|
|
// Note: do not break the flow here
|
|
|
|
if (pfrom.m_masternode_probe_connection && !pfrom.fFirstMessageIsMNAUTH) {
|
|
LogPrint(BCLog::NET, "connection is a masternode probe but first received message is not MNAUTH, peer=%d\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Stop processing non-block data early in blocks only mode and for block-relay-only peers
|
|
if (RejectIncomingTxs(pfrom) && NetMessageViolatesBlocksOnly(msg_type)) {
|
|
LogPrint(BCLog::NET, "%s sent in violation of protocol peer=%d\n", msg_type, pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::ADDR || msg_type == NetMsgType::ADDRV2) {
|
|
int stream_version = vRecv.GetVersion();
|
|
if (msg_type == NetMsgType::ADDRV2) {
|
|
// Add ADDRV2_FORMAT to the version so that the CNetAddr and CAddress
|
|
// unserialize methods know that an address in v2 format is coming.
|
|
stream_version |= ADDRV2_FORMAT;
|
|
}
|
|
|
|
OverrideStream<CDataStream> s(&vRecv, vRecv.GetType(), stream_version);
|
|
std::vector<CAddress> vAddr;
|
|
|
|
s >> vAddr;
|
|
|
|
if (!SetupAddressRelay(pfrom, *peer)) {
|
|
LogPrint(BCLog::NET, "ignoring %s message from %s peer=%d\n", msg_type, pfrom.ConnectionTypeAsString(), pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
if (vAddr.size() > MAX_ADDR_TO_SEND)
|
|
{
|
|
Misbehaving(pfrom.GetId(), 20, strprintf("%s message size = %u", msg_type, vAddr.size()));
|
|
return;
|
|
}
|
|
|
|
// Store the new addresses
|
|
std::vector<CAddress> vAddrOk;
|
|
int64_t nNow = GetAdjustedTime();
|
|
int64_t nSince = nNow - 10 * 60;
|
|
|
|
// Update/increment addr rate limiting bucket.
|
|
const auto current_time{GetTime<std::chrono::microseconds>()};
|
|
if (peer->m_addr_token_bucket < MAX_ADDR_PROCESSING_TOKEN_BUCKET) {
|
|
// Don't increment bucket if it's already full
|
|
const auto time_diff = std::max(current_time - peer->m_addr_token_timestamp, 0us);
|
|
const double increment = CountSecondsDouble(time_diff) * MAX_ADDR_RATE_PER_SECOND;
|
|
peer->m_addr_token_bucket = std::min<double>(peer->m_addr_token_bucket + increment, MAX_ADDR_PROCESSING_TOKEN_BUCKET);
|
|
}
|
|
peer->m_addr_token_timestamp = current_time;
|
|
|
|
const bool rate_limited = !pfrom.HasPermission(NetPermissionFlags::Addr);
|
|
uint64_t num_proc = 0;
|
|
uint64_t num_rate_limit = 0;
|
|
Shuffle(vAddr.begin(), vAddr.end(), FastRandomContext());
|
|
for (CAddress& addr : vAddr)
|
|
{
|
|
if (interruptMsgProc)
|
|
return;
|
|
|
|
// Apply rate limiting.
|
|
if (peer->m_addr_token_bucket < 1.0) {
|
|
if (rate_limited) {
|
|
++num_rate_limit;
|
|
continue;
|
|
}
|
|
} else {
|
|
peer->m_addr_token_bucket -= 1.0;
|
|
}
|
|
// We only bother storing full nodes, though this may include
|
|
// things which we would not make an outbound connection to, in
|
|
// part because we may make feeler connections to them.
|
|
if (!MayHaveUsefulAddressDB(addr.nServices) && !HasAllDesirableServiceFlags(addr.nServices))
|
|
continue;
|
|
|
|
if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
|
|
addr.nTime = nNow - 5 * 24 * 60 * 60;
|
|
AddAddressKnown(*peer, addr);
|
|
if (m_banman && (m_banman->IsDiscouraged(addr) || m_banman->IsBanned(addr))) {
|
|
// Do not process banned/discouraged addresses beyond remembering we received them
|
|
continue;
|
|
}
|
|
++num_proc;
|
|
bool fReachable = IsReachable(addr);
|
|
if (addr.nTime > nSince && !peer->m_getaddr_sent && vAddr.size() <= 10 && addr.IsRoutable()) {
|
|
// Relay to a limited number of other nodes
|
|
RelayAddress(pfrom.GetId(), addr, fReachable);
|
|
}
|
|
// Do not store addresses outside our network
|
|
if (fReachable)
|
|
vAddrOk.push_back(addr);
|
|
}
|
|
peer->m_addr_processed += num_proc;
|
|
peer->m_addr_rate_limited += num_rate_limit;
|
|
LogPrint(BCLog::NET, "Received addr: %u addresses (%u processed, %u rate-limited) from peer=%d\n",
|
|
vAddr.size(), num_proc, num_rate_limit, pfrom.GetId());
|
|
|
|
m_addrman.Add(vAddrOk, pfrom.addr, 2 * 60 * 60);
|
|
if (vAddr.size() < 1000) peer->m_getaddr_sent = false;
|
|
|
|
// AddrFetch: Require multiple addresses to avoid disconnecting on self-announcements
|
|
if (pfrom.IsAddrFetchConn() && vAddr.size() > 1) {
|
|
LogPrint(BCLog::NET_NETCONN, "addrfetch connection completed peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::SENDDSQUEUE)
|
|
{
|
|
bool b;
|
|
vRecv >> b;
|
|
pfrom.fSendDSQueue = b;
|
|
return;
|
|
}
|
|
|
|
|
|
if (msg_type == NetMsgType::QSENDRECSIGS) {
|
|
bool b;
|
|
vRecv >> b;
|
|
pfrom.fSendRecSigs = b;
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::INV) {
|
|
std::vector<CInv> vInv;
|
|
vRecv >> vInv;
|
|
if (vInv.size() > MAX_INV_SZ)
|
|
{
|
|
Misbehaving(pfrom.GetId(), 20, strprintf("inv message size = %u", vInv.size()));
|
|
return;
|
|
}
|
|
|
|
const bool reject_tx_invs{RejectIncomingTxs(pfrom)};
|
|
|
|
LOCK(cs_main);
|
|
|
|
const auto current_time{GetTime<std::chrono::microseconds>()};
|
|
uint256* best_block{nullptr};
|
|
|
|
for (CInv& inv : vInv) {
|
|
if(!inv.IsKnownType()) {
|
|
LogPrint(BCLog::NET, "got inv of unknown type %d: %s peer=%d\n", inv.type, inv.hash.ToString(), pfrom.GetId());
|
|
continue;
|
|
}
|
|
|
|
if (interruptMsgProc) return;
|
|
|
|
if (inv.IsMsgBlk()) {
|
|
const bool fAlreadyHave = AlreadyHaveBlock(inv.hash);
|
|
LogPrint(BCLog::NET, "got inv: %s %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom.GetId());
|
|
::g_stats_client->inc(strprintf("message.received.inv_%s", inv.GetCommand()), 1.0f);
|
|
|
|
UpdateBlockAvailability(pfrom.GetId(), inv.hash);
|
|
if (!fAlreadyHave && !fImporting && !fReindex && !IsBlockRequested(inv.hash)) {
|
|
// Headers-first is the primary method of announcement on
|
|
// the network. If a node fell back to sending blocks by
|
|
// inv, it may be for a re-org, or because we haven't
|
|
// completed initial headers sync. The final block hash
|
|
// provided should be the highest, so send a getheaders and
|
|
// then fetch the blocks we need to catch up.
|
|
best_block = &inv.hash;
|
|
}
|
|
} else {
|
|
if (reject_tx_invs && NetMessageViolatesBlocksOnly(inv.GetCommand())) {
|
|
LogPrint(BCLog::NET, "%s (%s) inv sent in violation of protocol, disconnecting peer=%d\n", inv.GetCommand(), inv.hash.ToString(), pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
const bool fAlreadyHave = AlreadyHave(inv);
|
|
LogPrint(BCLog::NET, "got inv: %s %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom.GetId());
|
|
::g_stats_client->inc(strprintf("message.received.inv_%s", inv.GetCommand()), 1.0f);
|
|
|
|
static std::set<int> allowWhileInIBDObjs = {
|
|
MSG_SPORK
|
|
};
|
|
|
|
AddKnownInv(*peer, inv.hash);
|
|
if (!fAlreadyHave) {
|
|
if (reject_tx_invs && inv.type == MSG_ISDLOCK) {
|
|
if (pfrom.GetCommonVersion() <= ADDRV2_PROTO_VERSION) {
|
|
// It's ok to receive these invs, we just ignore them
|
|
// and do not request corresponding objects.
|
|
continue;
|
|
}
|
|
// Peers with newer versions should never send us these invs when we are in blocks-relay-only mode
|
|
LogPrint(BCLog::NET, "%s (%s) inv sent in violation of protocol, disconnecting peer=%d\n", inv.GetCommand(), inv.hash.ToString(), pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
bool allowWhileInIBD = allowWhileInIBDObjs.count(inv.type);
|
|
if (allowWhileInIBD || !m_chainman.ActiveChainstate().IsInitialBlockDownload()) {
|
|
RequestObject(pfrom.GetId(), inv, current_time, is_masternode);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (best_block != nullptr) {
|
|
// If we haven't started initial headers-sync with this peer, then
|
|
// consider sending a getheaders now. On initial startup, there's a
|
|
// reliability vs bandwidth tradeoff, where we are only trying to do
|
|
// initial headers sync with one peer at a time, with a long
|
|
// timeout (at which point, if the sync hasn't completed, we will
|
|
// disconnect the peer and then choose another). In the meantime,
|
|
// as new blocks are found, we are willing to add one new peer per
|
|
// block to sync with as well, to sync quicker in the case where
|
|
// our initial peer is unresponsive (but less bandwidth than we'd
|
|
// use if we turned on sync with all peers).
|
|
CNodeState& state{*Assert(State(pfrom.GetId()))};
|
|
if (state.fSyncStarted || (!peer->m_inv_triggered_getheaders_before_sync && *best_block != m_last_block_inv_triggering_headers_sync)) {
|
|
std::string msg_type = UsesCompressedHeaders(*peer) ? NetMsgType::GETHEADERS2 : NetMsgType::GETHEADERS;
|
|
if (MaybeSendGetHeaders(pfrom, msg_type, m_chainman.ActiveChain().GetLocator(m_chainman.m_best_header), *peer)) {
|
|
LogPrint(BCLog::NET, "%s (%d) %s to peer=%d\n",
|
|
msg_type, m_chainman.m_best_header->nHeight, best_block->ToString(),
|
|
pfrom.GetId());
|
|
}
|
|
if (!state.fSyncStarted) {
|
|
peer->m_inv_triggered_getheaders_before_sync = true;
|
|
// Update the last block hash that triggered a new headers
|
|
// sync, so that we don't turn on headers sync with more
|
|
// than 1 new peer every new block.
|
|
m_last_block_inv_triggering_headers_sync = *best_block;
|
|
}
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETDATA) {
|
|
std::vector<CInv> vInv;
|
|
vRecv >> vInv;
|
|
if (vInv.size() > MAX_INV_SZ)
|
|
{
|
|
|
|
Misbehaving(pfrom.GetId(), 20, strprintf("getdata message size = %u", vInv.size()));
|
|
return;
|
|
}
|
|
|
|
LogPrint(BCLog::NET, "received getdata (%u invsz) peer=%d\n", vInv.size(), pfrom.GetId());
|
|
|
|
if (vInv.size() > 0) {
|
|
LogPrint(BCLog::NET, "received getdata for: %s peer=%d\n", vInv[0].ToString(), pfrom.GetId());
|
|
}
|
|
|
|
{
|
|
LOCK(peer->m_getdata_requests_mutex);
|
|
peer->m_getdata_requests.insert(peer->m_getdata_requests.end(), vInv.begin(), vInv.end());
|
|
ProcessGetData(pfrom, *peer, interruptMsgProc);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETBLOCKS) {
|
|
CBlockLocator locator;
|
|
uint256 hashStop;
|
|
vRecv >> locator >> hashStop;
|
|
|
|
if (locator.vHave.size() > MAX_LOCATOR_SZ) {
|
|
LogPrint(BCLog::NET, "getblocks locator size %lld > %d, disconnect peer=%d\n", locator.vHave.size(), MAX_LOCATOR_SZ, pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
// We might have announced the currently-being-connected tip using a
|
|
// compact block, which resulted in the peer sending a getblocks
|
|
// request, which we would otherwise respond to without the new block.
|
|
// To avoid this situation we simply verify that we are on our best
|
|
// known chain now. This is super overkill, but we handle it better
|
|
// for getheaders requests, and there are no known nodes which support
|
|
// compact blocks but still use getblocks to request blocks.
|
|
{
|
|
std::shared_ptr<const CBlock> a_recent_block;
|
|
{
|
|
LOCK(m_most_recent_block_mutex);
|
|
a_recent_block = m_most_recent_block;
|
|
}
|
|
BlockValidationState state;
|
|
if (!m_chainman.ActiveChainstate().ActivateBestChain(state, a_recent_block)) {
|
|
LogPrint(BCLog::NET, "failed to activate chain (%s)\n", state.ToString());
|
|
}
|
|
}
|
|
|
|
LOCK(cs_main);
|
|
|
|
// Find the last block the caller has in the main chain
|
|
const CBlockIndex* pindex = m_chainman.ActiveChainstate().FindForkInGlobalIndex(locator);
|
|
|
|
// Send the rest of the chain
|
|
if (pindex)
|
|
pindex = m_chainman.ActiveChain().Next(pindex);
|
|
int nLimit = 500;
|
|
LogPrint(BCLog::NET, "getblocks %d to %s limit %d from peer=%d\n", (pindex ? pindex->nHeight : -1), hashStop.IsNull() ? "end" : hashStop.ToString(), nLimit, pfrom.GetId());
|
|
for (; pindex; pindex = m_chainman.ActiveChain().Next(pindex))
|
|
{
|
|
if (pindex->GetBlockHash() == hashStop)
|
|
{
|
|
LogPrint(BCLog::NET, " getblocks stopping at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
|
|
break;
|
|
}
|
|
// If pruning, don't inv blocks unless we have on disk and are likely to still have
|
|
// for some reasonable time window (1 hour) that block relay might require.
|
|
const int nPrunedBlocksLikelyToHave = MIN_BLOCKS_TO_KEEP - 3600 / m_chainparams.GetConsensus().nPowTargetSpacing;
|
|
if (fPruneMode && (!(pindex->nStatus & BLOCK_HAVE_DATA) || pindex->nHeight <= m_chainman.ActiveChain().Tip()->nHeight - nPrunedBlocksLikelyToHave))
|
|
{
|
|
LogPrint(BCLog::NET, " getblocks stopping, pruned or too old block at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
|
|
break;
|
|
}
|
|
if (pfrom.CanRelay()) {
|
|
WITH_LOCK(peer->m_block_inv_mutex, peer->m_blocks_for_inv_relay.push_back(pindex->GetBlockHash()));
|
|
}
|
|
if (--nLimit <= 0) {
|
|
// When this block is requested, we'll send an inv that'll
|
|
// trigger the peer to getblocks the next batch of inventory.
|
|
LogPrint(BCLog::NET, " getblocks stopping at limit %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
|
|
WITH_LOCK(peer->m_block_inv_mutex, {peer->m_continuation_block = pindex->GetBlockHash();});
|
|
break;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETBLOCKTXN) {
|
|
BlockTransactionsRequest req;
|
|
vRecv >> req;
|
|
|
|
std::shared_ptr<const CBlock> recent_block;
|
|
{
|
|
LOCK(m_most_recent_block_mutex);
|
|
if (m_most_recent_block_hash == req.blockhash)
|
|
recent_block = m_most_recent_block;
|
|
// Unlock m_most_recent_block_mutex to avoid cs_main lock inversion
|
|
}
|
|
if (recent_block) {
|
|
SendBlockTransactions(pfrom, *recent_block, req);
|
|
return;
|
|
}
|
|
|
|
{
|
|
LOCK(cs_main);
|
|
|
|
const CBlockIndex* pindex = m_chainman.m_blockman.LookupBlockIndex(req.blockhash);
|
|
if (!pindex || !(pindex->nStatus & BLOCK_HAVE_DATA)) {
|
|
LogPrint(BCLog::NET, "Peer %d sent us a getblocktxn for a block we don't have\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
if (pindex->nHeight >= m_chainman.ActiveChain().Height() - MAX_BLOCKTXN_DEPTH) {
|
|
CBlock block;
|
|
bool ret = ReadBlockFromDisk(block, pindex, m_chainparams.GetConsensus());
|
|
assert(ret);
|
|
|
|
SendBlockTransactions(pfrom, block, req);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// If an older block is requested (should never happen in practice,
|
|
// but can happen in tests) send a block response instead of a
|
|
// blocktxn response. Sending a full block response instead of a
|
|
// small blocktxn response is preferable in the case where a peer
|
|
// might maliciously send lots of getblocktxn requests to trigger
|
|
// expensive disk reads, because it will require the peer to
|
|
// actually receive all the data read from disk over the network.
|
|
LogPrint(BCLog::NET, "Peer %d sent us a getblocktxn for a block > %i deep\n", pfrom.GetId(), MAX_BLOCKTXN_DEPTH);
|
|
CInv inv{MSG_BLOCK, req.blockhash};
|
|
WITH_LOCK(peer->m_getdata_requests_mutex, peer->m_getdata_requests.push_back(inv));
|
|
// The message processing loop will go around again (without pausing) and we'll respond then (without cs_main)
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETHEADERS || msg_type == NetMsgType::GETHEADERS2) {
|
|
CBlockLocator locator;
|
|
uint256 hashStop;
|
|
vRecv >> locator >> hashStop;
|
|
|
|
if (locator.vHave.size() > MAX_LOCATOR_SZ) {
|
|
LogPrint(BCLog::NET, "%s locator size %lld > %d, disconnect peer=%d\n", msg_type, locator.vHave.size(), MAX_LOCATOR_SZ, pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
if (fImporting || fReindex) {
|
|
LogPrint(BCLog::NET, "Ignoring %s from peer=%d while importing/reindexing\n", msg_type, pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
LOCK(cs_main);
|
|
|
|
// Note that if we were to be on a chain that forks from the checkpointed
|
|
// chain, then serving those headers to a peer that has seen the
|
|
// checkpointed chain would cause that peer to disconnect us. Requiring
|
|
// that our chainwork exceed nMinimumChainWork is a protection against
|
|
// being fed a bogus chain when we started up for the first time and
|
|
// getting partitioned off the honest network for serving that chain to
|
|
// others.
|
|
if (m_chainman.ActiveTip() == nullptr ||
|
|
(m_chainman.ActiveTip()->nChainWork < nMinimumChainWork && !pfrom.HasPermission(NetPermissionFlags::Download))) {
|
|
LogPrint(BCLog::NET, "Ignoring %s from peer=%d because active chain has too little work; sending empty response\n", msg_type, pfrom.GetId());
|
|
// Just respond with an empty headers message, to tell the peer to
|
|
// go away but not treat us as unresponsive.
|
|
std::string ret_type = UsesCompressedHeaders(*peer) ? NetMsgType::HEADERS2 : NetMsgType::HEADERS;
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(ret_type, std::vector<CBlock>()));
|
|
return;
|
|
}
|
|
|
|
CNodeState *nodestate = State(pfrom.GetId());
|
|
const CBlockIndex* pindex = nullptr;
|
|
if (locator.IsNull())
|
|
{
|
|
// If locator is null, return the hashStop block
|
|
pindex = m_chainman.m_blockman.LookupBlockIndex(hashStop);
|
|
if (!pindex) {
|
|
return;
|
|
}
|
|
|
|
if (!BlockRequestAllowed(pindex)) {
|
|
LogPrint(BCLog::NET, "%s: ignoring request from peer=%i for old block header that isn't in the main chain\n", __func__, pfrom.GetId());
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Find the last block the caller has in the main chain
|
|
pindex = m_chainman.ActiveChainstate().FindForkInGlobalIndex(locator);
|
|
if (pindex)
|
|
pindex = m_chainman.ActiveChain().Next(pindex);
|
|
}
|
|
|
|
const auto send_headers = [this /* for m_connman */, &hashStop, &pindex, &nodestate, &pfrom, &msgMaker](auto msg_type_internal, auto& v_headers, auto callback) {
|
|
int nLimit = GetHeadersLimit(pfrom, msg_type_internal == NetMsgType::HEADERS2);
|
|
for (; pindex; pindex = m_chainman.ActiveChain().Next(pindex)) {
|
|
v_headers.push_back(callback(pindex));
|
|
|
|
if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
|
|
break;
|
|
}
|
|
// pindex can be nullptr either if we sent m_chainman.ActiveChain().Tip() OR
|
|
// if our peer has m_chainman.ActiveChain().Tip() (and thus we are sending an empty
|
|
// headers message). In both cases it's safe to update
|
|
// pindexBestHeaderSent to be our tip.
|
|
//
|
|
// It is important that we simply reset the BestHeaderSent value here,
|
|
// and not max(BestHeaderSent, newHeaderSent). We might have announced
|
|
// the currently-being-connected tip using a compact block, which
|
|
// resulted in the peer sending a headers request, which we respond to
|
|
// without the new block. By resetting the BestHeaderSent, we ensure we
|
|
// will re-announce the new block via headers (or compact blocks again)
|
|
// in the SendMessages logic.
|
|
nodestate->pindexBestHeaderSent = pindex ? pindex : m_chainman.ActiveChain().Tip();
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(msg_type_internal, v_headers));
|
|
};
|
|
|
|
LogPrint(BCLog::NET, "%s %d to %s from peer=%d\n", msg_type, (pindex ? pindex->nHeight : -1), hashStop.IsNull() ? "end" : hashStop.ToString(), pfrom.GetId());
|
|
if (msg_type == NetMsgType::GETHEADERS) {
|
|
// we must use CBlocks, as CBlockHeaders won't include the 0x00 nTx count at the end
|
|
std::vector<CBlock> v_headers;
|
|
send_headers(NetMsgType::HEADERS, v_headers, [](const auto block_pindex) { return block_pindex->GetBlockHeader(); });
|
|
} else if (msg_type == NetMsgType::GETHEADERS2) {
|
|
// Keeps track of the last 7 unique version blocks
|
|
std::list<int32_t> last_unique_versions;
|
|
std::vector<CompressibleBlockHeader> v_headers;
|
|
|
|
send_headers(NetMsgType::HEADERS2, v_headers, [&v_headers, &last_unique_versions](const auto block_pindex) {
|
|
CompressibleBlockHeader compressible_header{block_pindex->GetBlockHeader()};
|
|
if (!v_headers.empty()) compressible_header.Compress(v_headers, last_unique_versions); // first block is always uncompressed
|
|
return compressible_header;
|
|
});
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::TX || msg_type == NetMsgType::DSTX) {
|
|
// Stop processing the transaction early if we are still in IBD since we don't
|
|
// have enough information to validate it yet. Sending unsolicited transactions
|
|
// is not considered a protocol violation, so don't punish the peer.
|
|
if (m_chainman.ActiveChainstate().IsInitialBlockDownload()) return;
|
|
|
|
CTransactionRef ptx;
|
|
CCoinJoinBroadcastTx dstx;
|
|
int nInvType = MSG_TX;
|
|
|
|
// Read data and assign inv type
|
|
if(msg_type == NetMsgType::TX) {
|
|
vRecv >> ptx;
|
|
} else if (msg_type == NetMsgType::DSTX) {
|
|
vRecv >> dstx;
|
|
ptx = dstx.tx;
|
|
nInvType = MSG_DSTX;
|
|
}
|
|
const CTransaction& tx = *ptx;
|
|
|
|
const uint256& txid = ptx->GetHash();
|
|
AddKnownInv(*peer, txid);
|
|
|
|
CInv inv(nInvType, tx.GetHash());
|
|
{
|
|
LOCK(cs_main);
|
|
EraseObjectRequest(pfrom.GetId(), inv);
|
|
}
|
|
|
|
// Process custom logic, no matter if tx will be accepted to mempool later or not
|
|
if (nInvType == MSG_DSTX) {
|
|
// Validate DSTX and return bRet if we need to return from here
|
|
uint256 hashTx = tx.GetHash();
|
|
const auto& [bRet, bDoReturn] = ValidateDSTX(*m_dmnman, *(m_cj_ctx->dstxman), m_chainman, m_mn_metaman, m_mempool, dstx, hashTx);
|
|
if (bDoReturn) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
LOCK2(cs_main, g_cs_orphans);
|
|
|
|
if (AlreadyHave(inv)) {
|
|
if (pfrom.HasPermission(NetPermissionFlags::ForceRelay)) {
|
|
// Always relay transactions received from peers with forcerelay permission, even
|
|
// if they were already in the mempool,
|
|
// allowing the node to function as a gateway for
|
|
// nodes hidden behind it.
|
|
if (!m_mempool.exists(tx.GetHash())) {
|
|
LogPrintf("Not relaying non-mempool transaction %s from forcerelay peer=%d\n", tx.GetHash().ToString(), pfrom.GetId());
|
|
} else {
|
|
LogPrintf("Force relaying tx %s from peer=%d\n", tx.GetHash().ToString(), pfrom.GetId());
|
|
RelayTransaction(tx.GetHash());
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
const MempoolAcceptResult result = m_chainman.ProcessTransaction(ptx);
|
|
const TxValidationState& state = result.m_state;
|
|
|
|
if (result.m_result_type == MempoolAcceptResult::ResultType::VALID) {
|
|
// Process custom txes, this changes AlreadyHave to "true"
|
|
if (nInvType == MSG_DSTX) {
|
|
LogPrint(BCLog::COINJOIN, "DSTX -- Masternode transaction accepted, txid=%s, peer=%d\n",
|
|
tx.GetHash().ToString(), pfrom.GetId());
|
|
m_cj_ctx->dstxman->AddDSTX(dstx);
|
|
}
|
|
|
|
RelayTransaction(tx.GetHash());
|
|
m_orphanage.AddChildrenToWorkSet(tx, peer->m_orphan_work_set);
|
|
|
|
pfrom.m_last_tx_time = GetTime<std::chrono::seconds>();
|
|
|
|
LogPrint(BCLog::MEMPOOL, "AcceptToMemoryPool: peer=%d: accepted %s (poolsz %u txn, %u kB)\n",
|
|
pfrom.GetId(),
|
|
tx.GetHash().ToString(),
|
|
m_mempool.size(), m_mempool.DynamicMemoryUsage() / 1000);
|
|
|
|
// Recursively process any orphan transactions that depended on this one
|
|
ProcessOrphanTx(peer->m_orphan_work_set);
|
|
}
|
|
else if (state.GetResult() == TxValidationResult::TX_MISSING_INPUTS)
|
|
{
|
|
bool fRejectedParents = false; // It may be the case that the orphans parents have all been rejected
|
|
|
|
// Deduplicate parent txids, so that we don't have to loop over
|
|
// the same parent txid more than once down below.
|
|
std::vector<uint256> unique_parents;
|
|
unique_parents.reserve(tx.vin.size());
|
|
for (const CTxIn& txin : tx.vin) {
|
|
// We start with all parents, and then remove duplicates below.
|
|
unique_parents.push_back(txin.prevout.hash);
|
|
}
|
|
std::sort(unique_parents.begin(), unique_parents.end());
|
|
unique_parents.erase(std::unique(unique_parents.begin(), unique_parents.end()), unique_parents.end());
|
|
for (const uint256& parent_txid : unique_parents) {
|
|
if (m_recent_rejects.contains(parent_txid)) {
|
|
fRejectedParents = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!fRejectedParents) {
|
|
const auto current_time{GetTime<std::chrono::microseconds>()};
|
|
|
|
for (const uint256& parent_txid : unique_parents) {
|
|
CInv _inv(MSG_TX, parent_txid);
|
|
AddKnownInv(*peer, _inv.hash);
|
|
if (!AlreadyHave(_inv)) RequestObject(pfrom.GetId(), _inv, current_time, is_masternode);
|
|
// We don't know if the previous tx was a regular or a mixing one, try both
|
|
CInv _inv2(MSG_DSTX, parent_txid);
|
|
AddKnownInv(*peer, _inv2.hash);
|
|
if (!AlreadyHave(_inv2)) RequestObject(pfrom.GetId(), _inv2, current_time, is_masternode);
|
|
}
|
|
|
|
if (m_orphanage.AddTx(ptx, pfrom.GetId())) {
|
|
AddToCompactExtraTransactions(ptx);
|
|
}
|
|
|
|
// DoS prevention: do not allow m_orphans to grow unbounded (see CVE-2012-3789)
|
|
unsigned int nMaxOrphanTxSize = (unsigned int)std::max((int64_t)0, gArgs.GetArg("-maxorphantxsize", DEFAULT_MAX_ORPHAN_TRANSACTIONS_SIZE)) * 1000000;
|
|
unsigned int nEvicted = m_orphanage.LimitOrphans(nMaxOrphanTxSize);
|
|
if (nEvicted > 0) {
|
|
LogPrint(BCLog::MEMPOOL, "orphanage overflow, removed %u tx\n", nEvicted);
|
|
}
|
|
} else {
|
|
LogPrint(BCLog::MEMPOOL, "not keeping orphan with rejected parents %s\n",tx.GetHash().ToString());
|
|
// We will continue to reject this tx since it has rejected
|
|
// parents so avoid re-requesting it from other peers.
|
|
m_recent_rejects.insert(tx.GetHash());
|
|
m_llmq_ctx->isman->TransactionRemovedFromMempool(ptx);
|
|
}
|
|
} else {
|
|
m_recent_rejects.insert(tx.GetHash());
|
|
if (RecursiveDynamicUsage(*ptx) < 100000) {
|
|
AddToCompactExtraTransactions(ptx);
|
|
}
|
|
}
|
|
|
|
// If a tx has been detected by m_recent_rejects, we will have reached
|
|
// this point and the tx will have been ignored. Because we haven't
|
|
// submitted the tx to our mempool, we won't have computed a DoS
|
|
// score for it or determined exactly why we consider it invalid.
|
|
//
|
|
// This means we won't penalize any peer subsequently relaying a DoSy
|
|
// tx (even if we penalized the first peer who gave it to us) because
|
|
// we have to account for m_recent_rejects showing false positives. In
|
|
// other words, we shouldn't penalize a peer if we aren't *sure* they
|
|
// submitted a DoSy tx.
|
|
//
|
|
// Note that m_recent_rejects doesn't just record DoSy or invalid
|
|
// transactions, but any tx not accepted by the m_mempool, which may be
|
|
// due to node policy (vs. consensus). So we can't blanket penalize a
|
|
// peer simply for relaying a tx that our m_recent_rejects has caught,
|
|
// regardless of false positives.
|
|
|
|
if (state.IsInvalid()) {
|
|
LogPrint(BCLog::MEMPOOLREJ, "%s from peer=%d was not accepted: %s\n", tx.GetHash().ToString(),
|
|
pfrom.GetId(),
|
|
state.ToString());
|
|
MaybePunishNodeForTx(pfrom.GetId(), state);
|
|
m_llmq_ctx->isman->TransactionRemovedFromMempool(ptx);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::CMPCTBLOCK)
|
|
{
|
|
// Ignore cmpctblock received while importing
|
|
if (fImporting || fReindex) {
|
|
LogPrint(BCLog::NET, "Unexpected cmpctblock message received from peer %d\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
CBlockHeaderAndShortTxIDs cmpctblock;
|
|
vRecv >> cmpctblock;
|
|
|
|
bool received_new_header = false;
|
|
|
|
{
|
|
LOCK(cs_main);
|
|
|
|
if (!m_chainman.m_blockman.LookupBlockIndex(cmpctblock.header.hashPrevBlock)) {
|
|
// Doesn't connect (or is genesis), instead of DoSing in AcceptBlockHeader, request deeper headers
|
|
if (!m_chainman.ActiveChainstate().IsInitialBlockDownload()) {
|
|
std::string ret_val = UsesCompressedHeaders(*peer) ? NetMsgType::GETHEADERS2 : NetMsgType::GETHEADERS;
|
|
MaybeSendGetHeaders(pfrom, ret_val, m_chainman.ActiveChain().GetLocator(m_chainman.m_best_header), *peer);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!m_chainman.m_blockman.LookupBlockIndex(cmpctblock.header.GetHash())) {
|
|
received_new_header = true;
|
|
}
|
|
}
|
|
|
|
const CBlockIndex *pindex = nullptr;
|
|
BlockValidationState state;
|
|
if (!m_chainman.ProcessNewBlockHeaders({cmpctblock.header}, state, m_chainparams, &pindex)) {
|
|
if (state.IsInvalid()) {
|
|
MaybePunishNodeForBlock(pfrom.GetId(), state, /*via_compact_block*/ true, "invalid header via cmpctblock");
|
|
return;
|
|
}
|
|
}
|
|
|
|
// When we succeed in decoding a block's txids from a cmpctblock
|
|
// message we typically jump to the BLOCKTXN handling code, with a
|
|
// dummy (empty) BLOCKTXN message, to re-use the logic there in
|
|
// completing processing of the putative block (without cs_main).
|
|
bool fProcessBLOCKTXN = false;
|
|
CDataStream blockTxnMsg(SER_NETWORK, PROTOCOL_VERSION);
|
|
|
|
// If we end up treating this as a plain headers message, call that as well
|
|
// without cs_main.
|
|
bool fRevertToHeaderProcessing = false;
|
|
|
|
// Keep a CBlock for "optimistic" compactblock reconstructions (see
|
|
// below)
|
|
std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
|
|
bool fBlockReconstructed = false;
|
|
|
|
{
|
|
LOCK2(cs_main, g_cs_orphans);
|
|
// If AcceptBlockHeader returned true, it set pindex
|
|
assert(pindex);
|
|
UpdateBlockAvailability(pfrom.GetId(), pindex->GetBlockHash());
|
|
|
|
CNodeState *nodestate = State(pfrom.GetId());
|
|
|
|
// If this was a new header with more work than our tip, update the
|
|
// peer's last block announcement time
|
|
if (received_new_header && pindex->nChainWork > m_chainman.ActiveChain().Tip()->nChainWork) {
|
|
nodestate->m_last_block_announcement = GetTime();
|
|
}
|
|
|
|
std::map<uint256, std::pair<NodeId, std::list<QueuedBlock>::iterator> >::iterator blockInFlightIt = mapBlocksInFlight.find(pindex->GetBlockHash());
|
|
bool fAlreadyInFlight = blockInFlightIt != mapBlocksInFlight.end();
|
|
|
|
if (pindex->nStatus & BLOCK_HAVE_DATA) // Nothing to do here
|
|
return;
|
|
|
|
if (pindex->nChainWork <= m_chainman.ActiveChain().Tip()->nChainWork || // We know something better
|
|
pindex->nTx != 0) { // We had this block at some point, but pruned it
|
|
if (fAlreadyInFlight) {
|
|
// We requested this block for some reason, but our mempool will probably be useless
|
|
// so we just grab the block via normal getdata
|
|
std::vector<CInv> vInv(1);
|
|
vInv[0] = CInv(MSG_BLOCK, cmpctblock.header.GetHash());
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::GETDATA, vInv));
|
|
}
|
|
return;
|
|
}
|
|
|
|
// If we're not close to tip yet, give up and let parallel block fetch work its magic
|
|
if (!fAlreadyInFlight && !CanDirectFetch())
|
|
return;
|
|
|
|
// We want to be a bit conservative just to be extra careful about DoS
|
|
// possibilities in compact block processing...
|
|
if (pindex->nHeight <= m_chainman.ActiveChain().Height() + 2) {
|
|
if ((!fAlreadyInFlight && nodestate->nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) ||
|
|
(fAlreadyInFlight && blockInFlightIt->second.first == pfrom.GetId())) {
|
|
std::list<QueuedBlock>::iterator *queuedBlockIt = nullptr;
|
|
if (!BlockRequested(pfrom.GetId(), *pindex, &queuedBlockIt)) {
|
|
if (!(*queuedBlockIt)->partialBlock)
|
|
(*queuedBlockIt)->partialBlock.reset(new PartiallyDownloadedBlock(&m_mempool));
|
|
else {
|
|
// The block was already in flight using compact blocks from the same peer
|
|
LogPrint(BCLog::NET, "Peer sent us compact block we were already syncing!\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
PartiallyDownloadedBlock& partialBlock = *(*queuedBlockIt)->partialBlock;
|
|
ReadStatus status = partialBlock.InitData(cmpctblock, vExtraTxnForCompact);
|
|
if (status == READ_STATUS_INVALID) {
|
|
RemoveBlockRequest(pindex->GetBlockHash()); // Reset in-flight state in case Misbehaving does not result in a disconnect
|
|
Misbehaving(pfrom.GetId(), 100, "invalid compact block");
|
|
return;
|
|
} else if (status == READ_STATUS_FAILED) {
|
|
// Duplicate txindexes, the block is now in-flight, so just request it
|
|
std::vector<CInv> vInv(1);
|
|
vInv[0] = CInv(MSG_BLOCK, cmpctblock.header.GetHash());
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::GETDATA, vInv));
|
|
return;
|
|
}
|
|
|
|
BlockTransactionsRequest req;
|
|
for (size_t i = 0; i < cmpctblock.BlockTxCount(); i++) {
|
|
if (!partialBlock.IsTxAvailable(i))
|
|
req.indexes.push_back(i);
|
|
}
|
|
if (req.indexes.empty()) {
|
|
// Dirty hack to jump to BLOCKTXN code (TODO: move message handling into their own functions)
|
|
BlockTransactions txn;
|
|
txn.blockhash = cmpctblock.header.GetHash();
|
|
blockTxnMsg << txn;
|
|
fProcessBLOCKTXN = true;
|
|
} else {
|
|
req.blockhash = pindex->GetBlockHash();
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::GETBLOCKTXN, req));
|
|
}
|
|
} else {
|
|
// This block is either already in flight from a different
|
|
// peer, or this peer has too many blocks outstanding to
|
|
// download from.
|
|
// Optimistically try to reconstruct anyway since we might be
|
|
// able to without any round trips.
|
|
PartiallyDownloadedBlock tempBlock(&m_mempool);
|
|
ReadStatus status = tempBlock.InitData(cmpctblock, vExtraTxnForCompact);
|
|
if (status != READ_STATUS_OK) {
|
|
// TODO: don't ignore failures
|
|
return;
|
|
}
|
|
std::vector<CTransactionRef> dummy;
|
|
status = tempBlock.FillBlock(*pblock, dummy);
|
|
if (status == READ_STATUS_OK) {
|
|
fBlockReconstructed = true;
|
|
}
|
|
}
|
|
} else {
|
|
if (fAlreadyInFlight) {
|
|
// We requested this block, but its far into the future, so our
|
|
// mempool will probably be useless - request the block normally
|
|
std::vector<CInv> vInv(1);
|
|
vInv[0] = CInv(MSG_BLOCK, cmpctblock.header.GetHash());
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::GETDATA, vInv));
|
|
return;
|
|
} else {
|
|
// If this was an announce-cmpctblock, we want the same treatment as a header message
|
|
fRevertToHeaderProcessing = true;
|
|
}
|
|
}
|
|
} // cs_main
|
|
|
|
if (fProcessBLOCKTXN)
|
|
return ProcessMessage(pfrom, NetMsgType::BLOCKTXN, blockTxnMsg, time_received, interruptMsgProc);
|
|
|
|
if (fRevertToHeaderProcessing) {
|
|
// Headers received from HB compact block peers are permitted to be
|
|
// relayed before full validation (see BIP 152), so we don't want to disconnect
|
|
// the peer if the header turns out to be for an invalid block.
|
|
// Note that if a peer tries to build on an invalid chain, that
|
|
// will be detected and the peer will be disconnected/discouraged.
|
|
return ProcessHeadersMessage(pfrom, *peer, {cmpctblock.header}, /*punish_duplicate_invalid=*/true);
|
|
}
|
|
|
|
if (fBlockReconstructed) {
|
|
// If we got here, we were able to optimistically reconstruct a
|
|
// block that is in flight from some other peer.
|
|
{
|
|
LOCK(cs_main);
|
|
mapBlockSource.emplace(pblock->GetHash(), std::make_pair(pfrom.GetId(), false));
|
|
}
|
|
// Setting force_processing to true means that we bypass some of
|
|
// our anti-DoS protections in AcceptBlock, which filters
|
|
// unrequested blocks that might be trying to waste our resources
|
|
// (eg disk space). Because we only try to reconstruct blocks when
|
|
// we're close to caught up (via the CanDirectFetch() requirement
|
|
// above, combined with the behavior of not requesting blocks until
|
|
// we have a chain with at least nMinimumChainWork), and we ignore
|
|
// compact blocks with less work than our tip, it is safe to treat
|
|
// reconstructed compact blocks as having been requested.
|
|
ProcessBlock(pfrom, pblock, /*force_processing=*/true);
|
|
LOCK(cs_main); // hold cs_main for CBlockIndex::IsValid()
|
|
if (pindex->IsValid(BLOCK_VALID_TRANSACTIONS)) {
|
|
// Clear download state for this block, which is in
|
|
// process from some other peer. We do this after calling
|
|
// ProcessNewBlock so that a malleated cmpctblock announcement
|
|
// can't be used to interfere with block relay.
|
|
RemoveBlockRequest(pblock->GetHash());
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::BLOCKTXN)
|
|
{
|
|
// Ignore blocktxn received while importing
|
|
if (fImporting || fReindex) {
|
|
LogPrint(BCLog::NET, "Unexpected blocktxn message received from peer %d\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
BlockTransactions resp;
|
|
vRecv >> resp;
|
|
|
|
std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
|
|
bool fBlockRead = false;
|
|
{
|
|
LOCK(cs_main);
|
|
|
|
std::map<uint256, std::pair<NodeId, std::list<QueuedBlock>::iterator> >::iterator it = mapBlocksInFlight.find(resp.blockhash);
|
|
if (it == mapBlocksInFlight.end() || !it->second.second->partialBlock ||
|
|
it->second.first != pfrom.GetId()) {
|
|
LogPrint(BCLog::NET, "Peer %d sent us block transactions for block we weren't expecting\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
PartiallyDownloadedBlock& partialBlock = *it->second.second->partialBlock;
|
|
ReadStatus status = partialBlock.FillBlock(*pblock, resp.txn);
|
|
if (status == READ_STATUS_INVALID) {
|
|
RemoveBlockRequest(resp.blockhash); // Reset in-flight state in case Misbehaving does not result in a disconnect
|
|
Misbehaving(pfrom.GetId(), 100, "invalid compact block/non-matching block transactions");
|
|
return;
|
|
} else if (status == READ_STATUS_FAILED) {
|
|
// Might have collided, fall back to getdata now :(
|
|
std::vector<CInv> invs;
|
|
invs.push_back(CInv(MSG_BLOCK, resp.blockhash));
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::GETDATA, invs));
|
|
} else {
|
|
// Block is either okay, or possibly we received
|
|
// READ_STATUS_CHECKBLOCK_FAILED.
|
|
// Note that CheckBlock can only fail for one of a few reasons:
|
|
// 1. bad-proof-of-work (impossible here, because we've already
|
|
// accepted the header)
|
|
// 2. merkleroot doesn't match the transactions given (already
|
|
// caught in FillBlock with READ_STATUS_FAILED, so
|
|
// impossible here)
|
|
// 3. the block is otherwise invalid (eg invalid coinbase,
|
|
// block is too big, too many legacy sigops, etc).
|
|
// So if CheckBlock failed, #3 is the only possibility.
|
|
// Under BIP 152, we don't discourage the peer unless proof of work is
|
|
// invalid (we don't require all the stateless checks to have
|
|
// been run). This is handled below, so just treat this as
|
|
// though the block was successfully read, and rely on the
|
|
// handling in ProcessNewBlock to ensure the block index is
|
|
// updated, etc.
|
|
RemoveBlockRequest(resp.blockhash); // it is now an empty pointer
|
|
fBlockRead = true;
|
|
// mapBlockSource is used for potentially punishing peers and
|
|
// updating which peers send us compact blocks, so the race
|
|
// between here and cs_main in ProcessNewBlock is fine.
|
|
// BIP 152 permits peers to relay compact blocks after validating
|
|
// the header only; we should not punish peers if the block turns
|
|
// out to be invalid.
|
|
mapBlockSource.emplace(resp.blockhash, std::make_pair(pfrom.GetId(), false));
|
|
}
|
|
} // Don't hold cs_main when we call into ProcessNewBlock
|
|
if (fBlockRead) {
|
|
// Since we requested this block (it was in mapBlocksInFlight), force it to be processed,
|
|
// even if it would not be a candidate for new tip (missing previous block, chain not long enough, etc)
|
|
// This bypasses some anti-DoS logic in AcceptBlock (eg to prevent
|
|
// disk-space attacks), but this should be safe due to the
|
|
// protections in the compact block handler -- see related comment
|
|
// in compact block optimistic reconstruction handling.
|
|
ProcessBlock(pfrom, pblock, /*force_processing=*/true);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::HEADERS || msg_type == NetMsgType::HEADERS2) {
|
|
// Ignore headers received while importing
|
|
if (fImporting || fReindex) {
|
|
LogPrint(BCLog::NET, "Unexpected headers message received from peer %d\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
// Assume that this is in response to any outstanding getheaders
|
|
// request we may have sent, and clear out the time of our last request
|
|
peer->m_last_getheaders_timestamp = 0s;
|
|
|
|
std::vector<CBlockHeader> headers;
|
|
|
|
// Bypass the normal CBlock deserialization, as we don't want to risk deserializing 2000 full blocks.
|
|
unsigned int nCount = ReadCompactSize(vRecv);
|
|
if (nCount > GetHeadersLimit(pfrom, msg_type == NetMsgType::HEADERS2)) {
|
|
Misbehaving(pfrom.GetId(), 20, strprintf("headers message size = %u", nCount));
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::HEADERS) {
|
|
headers.resize(nCount);
|
|
for (unsigned int n = 0; n < nCount; n++) {
|
|
vRecv >> headers[n];
|
|
ReadCompactSize(vRecv); // ignore tx count; assume it is 0.
|
|
}
|
|
} else if (msg_type == NetMsgType::HEADERS2) {
|
|
std::list<int32_t> last_unique_versions;
|
|
for (unsigned int n = 0; n < nCount; n++) {
|
|
CompressibleBlockHeader block_header_compressed;
|
|
vRecv >> block_header_compressed;
|
|
block_header_compressed.Uncompress(headers, last_unique_versions);
|
|
headers.push_back(block_header_compressed);
|
|
}
|
|
}
|
|
|
|
return ProcessHeadersMessage(pfrom, *peer, headers, /*via_compact_block=*/false);
|
|
}
|
|
|
|
if (msg_type == NetMsgType::BLOCK)
|
|
{
|
|
// Ignore block received while importing
|
|
if (fImporting || fReindex) {
|
|
LogPrint(BCLog::NET, "Unexpected block message received from peer %d\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
|
|
vRecv >> *pblock;
|
|
|
|
LogPrint(BCLog::NET, "received block %s peer=%d\n", pblock->GetHash().ToString(), pfrom.GetId());
|
|
|
|
bool forceProcessing = false;
|
|
const uint256 hash(pblock->GetHash());
|
|
{
|
|
LOCK(cs_main);
|
|
// Always process the block if we requested it, since we may
|
|
// need it even when it's not a candidate for a new best tip.
|
|
forceProcessing = IsBlockRequested(hash);
|
|
RemoveBlockRequest(hash);
|
|
// mapBlockSource is only used for punishing peers and setting
|
|
// which peers send us compact blocks, so the race between here and
|
|
// cs_main in ProcessNewBlock is fine.
|
|
mapBlockSource.emplace(hash, std::make_pair(pfrom.GetId(), true));
|
|
}
|
|
ProcessBlock(pfrom, pblock, forceProcessing);
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETADDR) {
|
|
// This asymmetric behavior for inbound and outbound connections was introduced
|
|
// to prevent a fingerprinting attack: an attacker can send specific fake addresses
|
|
// to users' AddrMan and later request them by sending getaddr messages.
|
|
// Making nodes which are behind NAT and can only make outgoing connections ignore
|
|
// the getaddr message mitigates the attack.
|
|
if (!pfrom.IsInboundConn()) {
|
|
LogPrint(BCLog::NET, "Ignoring \"getaddr\" from %s connection. peer=%d\n", pfrom.ConnectionTypeAsString(), pfrom.GetId());
|
|
return;
|
|
}
|
|
|
|
// Since this must be an inbound connection, SetupAddressRelay will
|
|
// never fail.
|
|
Assume(SetupAddressRelay(pfrom, *peer));
|
|
|
|
// Only send one GetAddr response per connection to reduce resource waste
|
|
// and discourage addr stamping of INV announcements.
|
|
if (peer->m_getaddr_recvd) {
|
|
LogPrint(BCLog::NET, "Ignoring repeated \"getaddr\". peer=%d\n", pfrom.GetId());
|
|
return;
|
|
}
|
|
peer->m_getaddr_recvd = true;
|
|
|
|
peer->m_addrs_to_send.clear();
|
|
std::vector<CAddress> vAddr;
|
|
if (pfrom.HasPermission(NetPermissionFlags::Addr)) {
|
|
vAddr = m_connman.GetAddresses(MAX_ADDR_TO_SEND, MAX_PCT_ADDR_TO_SEND, /* network */ std::nullopt);
|
|
} else {
|
|
vAddr = m_connman.GetAddresses(pfrom, MAX_ADDR_TO_SEND, MAX_PCT_ADDR_TO_SEND);
|
|
}
|
|
FastRandomContext insecure_rand;
|
|
for (const CAddress &addr : vAddr) {
|
|
PushAddress(*peer, addr, insecure_rand);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::MEMPOOL) {
|
|
// Only process received mempool messages if we advertise NODE_BLOOM
|
|
// or if the peer has mempool permissions.
|
|
if (!(peer->m_our_services & NODE_BLOOM) && !pfrom.HasPermission(NetPermissionFlags::Mempool))
|
|
{
|
|
if (!pfrom.HasPermission(NetPermissionFlags::NoBan))
|
|
{
|
|
LogPrint(BCLog::NET, "mempool request with bloom filters disabled, disconnect peer=%d\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (m_connman.OutboundTargetReached(false) && !pfrom.HasPermission(NetPermissionFlags::Mempool))
|
|
{
|
|
if (!pfrom.HasPermission(NetPermissionFlags::NoBan))
|
|
{
|
|
LogPrint(BCLog::NET, "mempool request with bandwidth limit reached, disconnect peer=%d\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
|
|
LOCK(tx_relay->m_tx_inventory_mutex);
|
|
tx_relay->m_send_mempool = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::PING) {
|
|
uint64_t nonce = 0;
|
|
vRecv >> nonce;
|
|
// Echo the message back with the nonce. This allows for two useful features:
|
|
//
|
|
// 1) A remote node can quickly check if the connection is operational
|
|
// 2) Remote nodes can measure the latency of the network thread. If this node
|
|
// is overloaded it won't respond to pings quickly and the remote node can
|
|
// avoid sending us more work, like chain download requests.
|
|
//
|
|
// The nonce stops the remote getting confused between different pings: without
|
|
// it, if the remote node sends a ping once per second and this node takes 5
|
|
// seconds to respond to each, the 5th ping the remote sends would appear to
|
|
// return very quickly.
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::PONG, nonce));
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::PONG) {
|
|
const auto ping_end = time_received;
|
|
uint64_t nonce = 0;
|
|
size_t nAvail = vRecv.in_avail();
|
|
bool bPingFinished = false;
|
|
std::string sProblem;
|
|
|
|
if (nAvail >= sizeof(nonce)) {
|
|
vRecv >> nonce;
|
|
|
|
// Only process pong message if there is an outstanding ping (old ping without nonce should never pong)
|
|
if (peer->m_ping_nonce_sent != 0) {
|
|
if (nonce == peer->m_ping_nonce_sent) {
|
|
// Matching pong received, this ping is no longer outstanding
|
|
bPingFinished = true;
|
|
const auto ping_time = ping_end - peer->m_ping_start.load();
|
|
if (ping_time.count() >= 0) {
|
|
// Let connman know about this successful ping-pong
|
|
pfrom.PongReceived(ping_time);
|
|
} else {
|
|
// This should never happen
|
|
sProblem = "Timing mishap";
|
|
}
|
|
} else {
|
|
// Nonce mismatches are normal when pings are overlapping
|
|
sProblem = "Nonce mismatch";
|
|
if (nonce == 0) {
|
|
// This is most likely a bug in another implementation somewhere; cancel this ping
|
|
bPingFinished = true;
|
|
sProblem = "Nonce zero";
|
|
}
|
|
}
|
|
} else {
|
|
sProblem = "Unsolicited pong without ping";
|
|
}
|
|
} else {
|
|
// This is most likely a bug in another implementation somewhere; cancel this ping
|
|
bPingFinished = true;
|
|
sProblem = "Short payload";
|
|
}
|
|
|
|
if (!(sProblem.empty())) {
|
|
LogPrint(BCLog::NET, "pong peer=%d: %s, %x expected, %x received, %u bytes\n",
|
|
pfrom.GetId(),
|
|
sProblem,
|
|
peer->m_ping_nonce_sent,
|
|
nonce,
|
|
nAvail);
|
|
}
|
|
if (bPingFinished) {
|
|
peer->m_ping_nonce_sent = 0;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::FILTERLOAD) {
|
|
if (!(peer->m_our_services & NODE_BLOOM)) {
|
|
LogPrint(BCLog::NET_NETCONN, "filterload received despite not offering bloom services from peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
CBloomFilter filter;
|
|
vRecv >> filter;
|
|
|
|
if (!filter.IsWithinSizeConstraints())
|
|
{
|
|
// There is no excuse for sending a too-large filter
|
|
Misbehaving(pfrom.GetId(), 100, "too-large bloom filter");
|
|
} else if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
|
|
{
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
tx_relay->m_bloom_filter.reset(new CBloomFilter(filter));
|
|
tx_relay->m_relay_txs = true;
|
|
}
|
|
pfrom.m_bloom_filter_loaded = true;
|
|
pfrom.m_relays_txs = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::FILTERADD) {
|
|
if (!(peer->m_our_services & NODE_BLOOM)) {
|
|
LogPrint(BCLog::NET_NETCONN, "filteradd received despite not offering bloom services from peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
std::vector<unsigned char> vData;
|
|
vRecv >> vData;
|
|
|
|
// Nodes must NEVER send a data item > 520 bytes (the max size for a script data object,
|
|
// and thus, the maximum size any matched object can have) in a filteradd message
|
|
bool bad = false;
|
|
if (vData.size() > MAX_SCRIPT_ELEMENT_SIZE) {
|
|
bad = true;
|
|
} else if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
if (tx_relay->m_bloom_filter) {
|
|
tx_relay->m_bloom_filter->insert(vData);
|
|
} else {
|
|
bad = true;
|
|
}
|
|
}
|
|
if (bad) {
|
|
Misbehaving(pfrom.GetId(), 100, "bad filteradd message");
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::FILTERCLEAR) {
|
|
if (!(peer->m_our_services & NODE_BLOOM)) {
|
|
LogPrint(BCLog::NET_NETCONN, "filterclear received despite not offering bloom services from peer=%d; disconnecting\n", pfrom.GetId());
|
|
pfrom.fDisconnect = true;
|
|
return;
|
|
}
|
|
auto tx_relay = peer->GetTxRelay();
|
|
if (!tx_relay) return;
|
|
|
|
{
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
tx_relay->m_bloom_filter = nullptr;
|
|
tx_relay->m_relay_txs = true;
|
|
}
|
|
pfrom.m_bloom_filter_loaded = false;
|
|
pfrom.m_relays_txs = true;
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETMNLISTDIFF) {
|
|
CGetSimplifiedMNListDiff cmd;
|
|
vRecv >> cmd;
|
|
|
|
LOCK(cs_main);
|
|
|
|
CSimplifiedMNListDiff mnListDiff;
|
|
std::string strError;
|
|
if (BuildSimplifiedMNListDiff(*m_dmnman, m_chainman, *m_llmq_ctx->quorum_block_processor, *m_llmq_ctx->qman,
|
|
cmd.baseBlockHash, cmd.blockHash, mnListDiff, strError))
|
|
{
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::MNLISTDIFF, mnListDiff));
|
|
} else {
|
|
strError = strprintf("getmnlistdiff failed for baseBlockHash=%s, blockHash=%s. error=%s", cmd.baseBlockHash.ToString(), cmd.blockHash.ToString(), strError);
|
|
Misbehaving(pfrom.GetId(), 1, strError);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETCFILTERS) {
|
|
ProcessGetCFilters(pfrom, *peer, vRecv);
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETCFHEADERS) {
|
|
ProcessGetCFHeaders(pfrom, *peer, vRecv);
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETCFCHECKPT) {
|
|
ProcessGetCFCheckPt(pfrom, *peer, vRecv);
|
|
return;
|
|
}
|
|
|
|
|
|
if (msg_type == NetMsgType::MNLISTDIFF) {
|
|
// we have never requested this
|
|
Misbehaving(pfrom.GetId(), 100, strprintf("received not-requested mnlistdiff. peer=%d", pfrom.GetId()));
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::GETQUORUMROTATIONINFO) {
|
|
llmq::CGetQuorumRotationInfo cmd;
|
|
vRecv >> cmd;
|
|
|
|
LOCK(cs_main);
|
|
|
|
llmq::CQuorumRotationInfo quorumRotationInfoRet;
|
|
std::string strError;
|
|
if (BuildQuorumRotationInfo(*m_dmnman, m_chainman, *m_llmq_ctx->qman, *m_llmq_ctx->quorum_block_processor, cmd, quorumRotationInfoRet, strError)) {
|
|
m_connman.PushMessage(&pfrom, msgMaker.Make(NetMsgType::QUORUMROTATIONINFO, quorumRotationInfoRet));
|
|
} else {
|
|
strError = strprintf("getquorumrotationinfo failed for size(baseBlockHashes)=%d, blockRequestHash=%s. error=%s", cmd.baseBlockHashes.size(), cmd.blockRequestHash.ToString(), strError);
|
|
Misbehaving(pfrom.GetId(), 1, strError);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::QUORUMROTATIONINFO) {
|
|
// we have never requested this
|
|
Misbehaving(pfrom.GetId(), 100, strprintf("received not-requested quorumrotationinfo. peer=%d", pfrom.GetId()));
|
|
return;
|
|
}
|
|
|
|
if (msg_type == NetMsgType::NOTFOUND) {
|
|
// Remove the NOTFOUND transactions from the peer
|
|
LOCK(cs_main);
|
|
CNodeState *state = State(pfrom.GetId());
|
|
std::vector<CInv> vInv;
|
|
vRecv >> vInv;
|
|
if (vInv.size() <= MAX_PEER_OBJECT_IN_FLIGHT + MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
|
|
for (CInv &inv : vInv) {
|
|
if (inv.IsKnownType()) {
|
|
// If we receive a NOTFOUND message for a txid we requested, erase
|
|
// it from our data structures for this peer.
|
|
auto in_flight_it = state->m_object_download.m_object_in_flight.find(inv);
|
|
if (in_flight_it == state->m_object_download.m_object_in_flight.end()) {
|
|
// Skip any further work if this is a spurious NOTFOUND
|
|
// message.
|
|
continue;
|
|
}
|
|
state->m_object_download.m_object_in_flight.erase(in_flight_it);
|
|
state->m_object_download.m_object_announced.erase(inv);
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
bool found = false;
|
|
const std::vector<std::string> &allMessages = getAllNetMessageTypes();
|
|
for (const std::string& msg : allMessages) {
|
|
if(msg == msg_type) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (found)
|
|
{
|
|
//probably one the extensions
|
|
#ifdef ENABLE_WALLET
|
|
ProcessPeerMsgRet(m_cj_ctx->queueman->ProcessMessage(pfrom, msg_type, vRecv), pfrom);
|
|
m_cj_ctx->walletman->ForEachCJClientMan([this, &pfrom, &msg_type, &vRecv](std::unique_ptr<CCoinJoinClientManager>& clientman) {
|
|
clientman->ProcessMessage(pfrom, m_chainman.ActiveChainstate(), m_connman, m_mempool, msg_type, vRecv);
|
|
});
|
|
#endif // ENABLE_WALLET
|
|
ProcessPeerMsgRet(m_cj_ctx->server->ProcessMessage(pfrom, msg_type, vRecv), pfrom);
|
|
ProcessPeerMsgRet(m_sporkman.ProcessMessage(pfrom, m_connman, *this, msg_type, vRecv), pfrom);
|
|
m_mn_sync.ProcessMessage(pfrom, msg_type, vRecv);
|
|
ProcessPeerMsgRet(m_govman.ProcessMessage(pfrom, m_connman, *this, msg_type, vRecv), pfrom);
|
|
ProcessPeerMsgRet(CMNAuth::ProcessMessage(pfrom, peer->m_their_services, m_connman, m_mn_metaman, m_mn_activeman, m_chainman.ActiveChain(), m_mn_sync, m_dmnman->GetListAtChainTip(), msg_type, vRecv), pfrom);
|
|
PostProcessMessage(m_llmq_ctx->quorum_block_processor->ProcessMessage(pfrom, msg_type, vRecv), pfrom.GetId());
|
|
ProcessPeerMsgRet(m_llmq_ctx->qdkgsman->ProcessMessage(pfrom, this, is_masternode, msg_type, vRecv), pfrom);
|
|
ProcessPeerMsgRet(m_llmq_ctx->qman->ProcessMessage(pfrom, msg_type, vRecv), pfrom);
|
|
m_llmq_ctx->shareman->ProcessMessage(pfrom, m_sporkman, msg_type, vRecv);
|
|
ProcessPeerMsgRet(m_llmq_ctx->sigman->ProcessMessage(pfrom, msg_type, vRecv), pfrom);
|
|
|
|
if (msg_type == NetMsgType::CLSIG) {
|
|
if (llmq::AreChainLocksEnabled(m_sporkman)) {
|
|
llmq::CChainLockSig clsig;
|
|
vRecv >> clsig;
|
|
const uint256& hash = ::SerializeHash(clsig);
|
|
WITH_LOCK(::cs_main, EraseObjectRequest(pfrom.GetId(), CInv{MSG_CLSIG, hash}));
|
|
PostProcessMessage(m_llmq_ctx->clhandler->ProcessNewChainLock(pfrom.GetId(), clsig, hash), pfrom.GetId());
|
|
}
|
|
return; // CLSIG
|
|
}
|
|
|
|
ProcessPeerMsgRet(m_llmq_ctx->isman->ProcessMessage(pfrom, msg_type, vRecv), pfrom);
|
|
return;
|
|
}
|
|
|
|
// Ignore unknown commands for extensibility
|
|
LogPrint(BCLog::NET, "Unknown command \"%s\" from peer=%d\n", SanitizeString(msg_type), pfrom.GetId());
|
|
|
|
return;
|
|
}
|
|
|
|
bool PeerManagerImpl::MaybeDiscourageAndDisconnect(CNode& pnode, Peer& peer)
|
|
{
|
|
{
|
|
LOCK(peer.m_misbehavior_mutex);
|
|
|
|
// There's nothing to do if the m_should_discourage flag isn't set
|
|
if (!peer.m_should_discourage) return false;
|
|
|
|
peer.m_should_discourage = false;
|
|
} // peer.m_misbehavior_mutex
|
|
|
|
if (pnode.HasPermission(NetPermissionFlags::NoBan)) {
|
|
// We never disconnect or discourage peers for bad behavior if they have NetPermissionFlags::NoBan permission
|
|
LogPrintf("Warning: not punishing noban peer %d!\n", peer.m_id);
|
|
return false;
|
|
}
|
|
|
|
if (pnode.IsManualConn()) {
|
|
// We never disconnect or discourage manual peers for bad behavior
|
|
LogPrintf("Warning: not punishing manually connected peer %d!\n", peer.m_id);
|
|
return false;
|
|
}
|
|
|
|
if (pnode.addr.IsLocal()) {
|
|
// We disconnect local peers for bad behavior but don't discourage (since that would discourage
|
|
// all peers on the same local address)
|
|
LogPrint(BCLog::NET, "Warning: disconnecting but not discouraging %s peer %d!\n",
|
|
pnode.m_inbound_onion ? "inbound onion" : "local", peer.m_id);
|
|
pnode.fDisconnect = true;
|
|
return true;
|
|
}
|
|
|
|
// Normal case: Disconnect the peer and discourage all nodes sharing the address
|
|
LogPrint(BCLog::NET, "Disconnecting and discouraging peer %d!\n", peer.m_id);
|
|
if (m_banman) m_banman->Discourage(pnode.addr);
|
|
m_connman.DisconnectNode(pnode.addr);
|
|
return true;
|
|
}
|
|
|
|
bool PeerManagerImpl::ProcessMessages(CNode* pfrom, std::atomic<bool>& interruptMsgProc)
|
|
{
|
|
AssertLockHeld(g_msgproc_mutex);
|
|
|
|
PeerRef peer = GetPeerRef(pfrom->GetId());
|
|
if (peer == nullptr) return false;
|
|
|
|
{
|
|
LOCK(peer->m_getdata_requests_mutex);
|
|
if (!peer->m_getdata_requests.empty()) {
|
|
ProcessGetData(*pfrom, *peer, interruptMsgProc);
|
|
}
|
|
}
|
|
|
|
{
|
|
LOCK2(cs_main, g_cs_orphans);
|
|
if (!peer->m_orphan_work_set.empty()) {
|
|
ProcessOrphanTx(peer->m_orphan_work_set);
|
|
}
|
|
}
|
|
|
|
if (pfrom->fDisconnect)
|
|
return false;
|
|
|
|
// this maintains the order of responses
|
|
// and prevents m_getdata_requests to grow unbounded
|
|
{
|
|
LOCK(peer->m_getdata_requests_mutex);
|
|
if (!peer->m_getdata_requests.empty()) return true;
|
|
}
|
|
|
|
{
|
|
LOCK(g_cs_orphans);
|
|
if (!peer->m_orphan_work_set.empty()) return true;
|
|
}
|
|
|
|
// Don't bother if send buffer is too full to respond anyway
|
|
if (pfrom->fPauseSend) return false;
|
|
|
|
auto poll_result{pfrom->PollMessage()};
|
|
if (!poll_result) {
|
|
// No message to process
|
|
return false;
|
|
}
|
|
|
|
CNetMessage& msg{poll_result->first};
|
|
bool fMoreWork = poll_result->second;
|
|
|
|
TRACE6(net, inbound_message,
|
|
pfrom->GetId(),
|
|
pfrom->m_addr_name.c_str(),
|
|
pfrom->ConnectionTypeAsString().c_str(),
|
|
msg.m_type.c_str(),
|
|
msg.m_recv.size(),
|
|
msg.m_recv.data()
|
|
);
|
|
|
|
if (gArgs.GetBoolArg("-capturemessages", false)) {
|
|
CaptureMessage(pfrom->addr, msg.m_type, MakeUCharSpan(msg.m_recv), /* is_incoming */ true);
|
|
}
|
|
|
|
msg.SetVersion(pfrom->GetCommonVersion());
|
|
|
|
try {
|
|
ProcessMessage(*pfrom, msg.m_type, msg.m_recv, msg.m_time, interruptMsgProc);
|
|
if (interruptMsgProc) return false;
|
|
{
|
|
LOCK(peer->m_getdata_requests_mutex);
|
|
if (!peer->m_getdata_requests.empty()) fMoreWork = true;
|
|
}
|
|
} catch (const std::exception& e) {
|
|
LogPrint(BCLog::NET, "%s(%s, %u bytes): Exception '%s' (%s) caught\n", __func__, SanitizeString(msg.m_type), msg.m_message_size, e.what(), typeid(e).name());
|
|
} catch (...) {
|
|
LogPrint(BCLog::NET, "%s(%s, %u bytes): Unknown exception caught\n", __func__, SanitizeString(msg.m_type), msg.m_message_size);
|
|
}
|
|
|
|
return fMoreWork;
|
|
}
|
|
|
|
void PeerManagerImpl::ConsiderEviction(CNode& pto, Peer& peer, std::chrono::seconds time_in_seconds)
|
|
{
|
|
AssertLockHeld(cs_main);
|
|
|
|
CNodeState &state = *State(pto.GetId());
|
|
|
|
if (!state.m_chain_sync.m_protect && pto.IsOutboundOrBlockRelayConn() && state.fSyncStarted) {
|
|
// This is an outbound peer subject to disconnection if they don't
|
|
// announce a block with as much work as the current tip within
|
|
// CHAIN_SYNC_TIMEOUT + HEADERS_RESPONSE_TIME seconds (note: if
|
|
// their chain has more work than ours, we should sync to it,
|
|
// unless it's invalid, in which case we should find that out and
|
|
// disconnect from them elsewhere).
|
|
if (state.pindexBestKnownBlock != nullptr && state.pindexBestKnownBlock->nChainWork >= m_chainman.ActiveChain().Tip()->nChainWork) {
|
|
if (state.m_chain_sync.m_timeout != 0s) {
|
|
state.m_chain_sync.m_timeout = 0s;
|
|
state.m_chain_sync.m_work_header = nullptr;
|
|
state.m_chain_sync.m_sent_getheaders = false;
|
|
}
|
|
} else if (state.m_chain_sync.m_timeout == 0s || (state.m_chain_sync.m_work_header != nullptr && state.pindexBestKnownBlock != nullptr && state.pindexBestKnownBlock->nChainWork >= state.m_chain_sync.m_work_header->nChainWork)) {
|
|
// Our best block known by this peer is behind our tip, and we're either noticing
|
|
// that for the first time, OR this peer was able to catch up to some earlier point
|
|
// where we checked against our tip.
|
|
// Either way, set a new timeout based on current tip.
|
|
state.m_chain_sync.m_timeout = time_in_seconds + CHAIN_SYNC_TIMEOUT;
|
|
state.m_chain_sync.m_work_header = m_chainman.ActiveChain().Tip();
|
|
state.m_chain_sync.m_sent_getheaders = false;
|
|
} else if (state.m_chain_sync.m_timeout > 0s && time_in_seconds > state.m_chain_sync.m_timeout) {
|
|
// No evidence yet that our peer has synced to a chain with work equal to that
|
|
// of our tip, when we first detected it was behind. Send a single getheaders
|
|
// message to give the peer a chance to update us.
|
|
if (state.m_chain_sync.m_sent_getheaders) {
|
|
// They've run out of time to catch up!
|
|
LogPrintf("Disconnecting outbound peer %d for old chain, best known block = %s\n", pto.GetId(), state.pindexBestKnownBlock != nullptr ? state.pindexBestKnownBlock->GetBlockHash().ToString() : "<none>");
|
|
pto.fDisconnect = true;
|
|
} else {
|
|
assert(state.m_chain_sync.m_work_header);
|
|
// Here, we assume that the getheaders message goes out,
|
|
// because it'll either go out or be skipped because of a
|
|
// getheaders in-flight already, in which case the peer should
|
|
// still respond to us with a sufficiently high work chain tip.
|
|
std::string msg_type = UsesCompressedHeaders(peer) ? NetMsgType::GETHEADERS2 : NetMsgType::GETHEADERS;
|
|
MaybeSendGetHeaders(pto,
|
|
msg_type, m_chainman.ActiveChain().GetLocator(state.m_chain_sync.m_work_header->pprev),
|
|
peer);
|
|
LogPrint(BCLog::NET, "sending %s to outbound peer=%d to verify chain work (current best known block:%s, benchmark blockhash: %s)\n", msg_type, pto.GetId(), state.pindexBestKnownBlock != nullptr ? state.pindexBestKnownBlock->GetBlockHash().ToString() : "<none>", state.m_chain_sync.m_work_header->GetBlockHash().ToString());
|
|
state.m_chain_sync.m_sent_getheaders = true;
|
|
// Bump the timeout to allow a response, which could clear the timeout
|
|
// (if the response shows the peer has synced), reset the timeout (if
|
|
// the peer syncs to the required work but not to our tip), or result
|
|
// in disconnect (if we advance to the timeout and pindexBestKnownBlock
|
|
// has not sufficiently progressed)
|
|
state.m_chain_sync.m_timeout = time_in_seconds + HEADERS_RESPONSE_TIME;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::EvictExtraOutboundPeers(std::chrono::seconds now)
|
|
{
|
|
// If we have any extra block-relay-only peers, disconnect the youngest unless
|
|
// it's given us a block -- in which case, compare with the second-youngest, and
|
|
// out of those two, disconnect the peer who least recently gave us a block.
|
|
// The youngest block-relay-only peer would be the extra peer we connected
|
|
// to temporarily in order to sync our tip; see net.cpp.
|
|
// Note that we use higher nodeid as a measure for most recent connection.
|
|
if (m_connman.GetExtraBlockRelayCount() > 0) {
|
|
std::pair<NodeId, std::chrono::seconds> youngest_peer{-1, 0}, next_youngest_peer{-1, 0};
|
|
|
|
m_connman.ForEachNode([&](CNode* pnode) {
|
|
if (!pnode->IsBlockOnlyConn() || pnode->fDisconnect) return;
|
|
if (pnode->GetId() > youngest_peer.first) {
|
|
next_youngest_peer = youngest_peer;
|
|
youngest_peer.first = pnode->GetId();
|
|
youngest_peer.second = pnode->m_last_block_time;
|
|
}
|
|
});
|
|
NodeId to_disconnect = youngest_peer.first;
|
|
if (youngest_peer.second > next_youngest_peer.second) {
|
|
// Our newest block-relay-only peer gave us a block more recently;
|
|
// disconnect our second youngest.
|
|
to_disconnect = next_youngest_peer.first;
|
|
}
|
|
m_connman.ForNode(to_disconnect, [&](CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
|
|
AssertLockHeld(::cs_main);
|
|
// Make sure we're not getting a block right now, and that
|
|
// we've been connected long enough for this eviction to happen
|
|
// at all.
|
|
// Note that we only request blocks from a peer if we learn of a
|
|
// valid headers chain with at least as much work as our tip.
|
|
CNodeState *node_state = State(pnode->GetId());
|
|
if (node_state == nullptr ||
|
|
(now - pnode->m_connected >= MINIMUM_CONNECT_TIME && node_state->nBlocksInFlight == 0)) {
|
|
pnode->fDisconnect = true;
|
|
LogPrint(BCLog::NET, "disconnecting extra block-relay-only peer=%d (last block received at time %d)\n",
|
|
pnode->GetId(), count_seconds(pnode->m_last_block_time));
|
|
return true;
|
|
} else {
|
|
LogPrint(BCLog::NET, "keeping block-relay-only peer=%d chosen for eviction (connect time: %d, blocks_in_flight: %d)\n",
|
|
pnode->GetId(), count_seconds(pnode->m_connected), node_state->nBlocksInFlight);
|
|
}
|
|
return false;
|
|
});
|
|
}
|
|
|
|
// Check whether we have too many outbound-full-relay peers
|
|
if (m_connman.GetExtraFullOutboundCount() > 0) {
|
|
// If we have more outbound-full-relay peers than we target, disconnect one.
|
|
// Pick the outbound-full-relay peer that least recently announced
|
|
// us a new block, with ties broken by choosing the more recent
|
|
// connection (higher node id)
|
|
// Protect peers from eviction if we don't have another connection
|
|
// to their network, counting both outbound-full-relay and manual peers.
|
|
NodeId worst_peer = -1;
|
|
int64_t oldest_block_announcement = std::numeric_limits<int64_t>::max();
|
|
|
|
// We want to prevent recently connected to Onion peers from being disconnected here, protect them as long as
|
|
// there are more non_onion nodes than onion nodes so far
|
|
size_t onion_count = 0;
|
|
|
|
m_connman.ForEachNode([&](CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_connman.GetNodesMutex()) {
|
|
AssertLockHeld(::cs_main);
|
|
if (pnode->addr.IsTor() && ++onion_count <= m_connman.GetMaxOutboundOnionNodeCount()) return;
|
|
// Don't disconnect masternodes just because they were slow in block announcement
|
|
if (pnode->m_masternode_connection) return;
|
|
// Only consider outbound-full-relay peers that are not already
|
|
// marked for disconnection
|
|
if (!pnode->IsFullOutboundConn() || pnode->fDisconnect) return;
|
|
CNodeState *state = State(pnode->GetId());
|
|
if (state == nullptr) return; // shouldn't be possible, but just in case
|
|
// Don't evict our protected peers
|
|
if (state->m_chain_sync.m_protect) return;
|
|
// If this is the only connection on a particular network that is
|
|
// OUTBOUND_FULL_RELAY or MANUAL, protect it.
|
|
if (!m_connman.MultipleManualOrFullOutboundConns(pnode->addr.GetNetwork())) return;
|
|
if (state->m_last_block_announcement < oldest_block_announcement || (state->m_last_block_announcement == oldest_block_announcement && pnode->GetId() > worst_peer)) {
|
|
worst_peer = pnode->GetId();
|
|
oldest_block_announcement = state->m_last_block_announcement;
|
|
}
|
|
});
|
|
if (worst_peer != -1) {
|
|
bool disconnected = m_connman.ForNode(worst_peer, [&](CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
|
|
AssertLockHeld(::cs_main);
|
|
|
|
// Only disconnect a peer that has been connected to us for
|
|
// some reasonable fraction of our check-frequency, to give
|
|
// it time for new information to have arrived.
|
|
// Also don't disconnect any peer we're trying to download a
|
|
// block from.
|
|
CNodeState &state = *State(pnode->GetId());
|
|
if (now - pnode->m_connected > MINIMUM_CONNECT_TIME && state.nBlocksInFlight == 0) {
|
|
LogPrint(BCLog::NET, "disconnecting extra outbound peer=%d (last block announcement received at time %d)\n", pnode->GetId(), oldest_block_announcement);
|
|
pnode->fDisconnect = true;
|
|
return true;
|
|
} else {
|
|
LogPrint(BCLog::NET, "keeping outbound peer=%d chosen for eviction (connect time: %d, blocks_in_flight: %d)\n",
|
|
pnode->GetId(), count_seconds(pnode->m_connected), state.nBlocksInFlight);
|
|
return false;
|
|
}
|
|
});
|
|
if (disconnected) {
|
|
// If we disconnected an extra peer, that means we successfully
|
|
// connected to at least one peer after the last time we
|
|
// detected a stale tip. Don't try any more extra peers until
|
|
// we next detect a stale tip, to limit the load we put on the
|
|
// network from these extra connections.
|
|
m_connman.SetTryNewOutboundPeer(false);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::CheckForStaleTipAndEvictPeers()
|
|
{
|
|
LOCK(cs_main);
|
|
|
|
auto now{GetTime<std::chrono::seconds>()};
|
|
|
|
EvictExtraOutboundPeers(now);
|
|
|
|
if (now > m_stale_tip_check_time) {
|
|
// Check whether our tip is stale, and if so, allow using an extra
|
|
// outbound peer
|
|
if (!fImporting && !fReindex && m_connman.GetNetworkActive() && m_connman.GetUseAddrmanOutgoing() && TipMayBeStale()) {
|
|
LogPrintf("Potential stale tip detected, will try using extra outbound peer (last tip update: %d seconds ago)\n",
|
|
count_seconds(now - m_last_tip_update.load()));
|
|
m_connman.SetTryNewOutboundPeer(true);
|
|
} else if (m_connman.GetTryNewOutboundPeer()) {
|
|
m_connman.SetTryNewOutboundPeer(false);
|
|
}
|
|
m_stale_tip_check_time = now + STALE_CHECK_INTERVAL;
|
|
}
|
|
|
|
if (!m_initial_sync_finished && CanDirectFetch()) {
|
|
m_connman.StartExtraBlockRelayPeers();
|
|
m_initial_sync_finished = true;
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::MaybeSendPing(CNode& node_to, Peer& peer, std::chrono::microseconds now)
|
|
{
|
|
if (m_connman.ShouldRunInactivityChecks(node_to, std::chrono::duration_cast<std::chrono::seconds>(now)) &&
|
|
peer.m_ping_nonce_sent &&
|
|
now > peer.m_ping_start.load() + TIMEOUT_INTERVAL)
|
|
{
|
|
// The ping timeout is using mocktime. To disable the check during
|
|
// testing, increase -peertimeout.
|
|
LogPrint(BCLog::NET, "ping timeout: %fs peer=%d\n", 0.000001 * count_microseconds(now - peer.m_ping_start.load()), peer.m_id);
|
|
node_to.fDisconnect = true;
|
|
return;
|
|
}
|
|
|
|
const CNetMsgMaker msgMaker(node_to.GetCommonVersion());
|
|
bool pingSend = false;
|
|
|
|
if (peer.m_ping_queued) {
|
|
// RPC ping request by user
|
|
pingSend = true;
|
|
}
|
|
|
|
if (peer.m_ping_nonce_sent == 0 && now > peer.m_ping_start.load() + PING_INTERVAL) {
|
|
// Ping automatically sent as a latency probe & keepalive.
|
|
pingSend = true;
|
|
}
|
|
|
|
if (pingSend) {
|
|
uint64_t nonce = 0;
|
|
while (nonce == 0) {
|
|
GetRandBytes({(unsigned char*)&nonce, sizeof(nonce)});
|
|
}
|
|
peer.m_ping_queued = false;
|
|
peer.m_ping_start = now;
|
|
peer.m_ping_nonce_sent = nonce;
|
|
m_connman.PushMessage(&node_to, msgMaker.Make(NetMsgType::PING, nonce));
|
|
}
|
|
}
|
|
|
|
void PeerManagerImpl::MaybeSendAddr(CNode& node, Peer& peer, std::chrono::microseconds current_time)
|
|
{
|
|
// Nothing to do for non-address-relay peers
|
|
if (!peer.m_addr_relay_enabled) return;
|
|
|
|
LOCK(peer.m_addr_send_times_mutex);
|
|
// Periodically advertise our local address to the peer.
|
|
if (fListen && !m_chainman.ActiveChainstate().IsInitialBlockDownload() &&
|
|
peer.m_next_local_addr_send < current_time) {
|
|
// If we've sent before, clear the bloom filter for the peer, so that our
|
|
// self-announcement will actually go out.
|
|
// This might be unnecessary if the bloom filter has already rolled
|
|
// over since our last self-announcement, but there is only a small
|
|
// bandwidth cost that we can incur by doing this (which happens
|
|
// once a day on average).
|
|
if (peer.m_next_local_addr_send != 0us) {
|
|
peer.m_addr_known->reset();
|
|
}
|
|
if (std::optional<CService> local_service = GetLocalAddrForPeer(node)) {
|
|
CAddress local_addr{*local_service, peer.m_our_services, (uint32_t)GetAdjustedTime()};
|
|
FastRandomContext insecure_rand;
|
|
PushAddress(peer, local_addr, insecure_rand);
|
|
}
|
|
peer.m_next_local_addr_send = GetExponentialRand(current_time, AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL);
|
|
}
|
|
|
|
// We sent an `addr` message to this peer recently. Nothing more to do.
|
|
if (current_time <= peer.m_next_addr_send) return;
|
|
|
|
peer.m_next_addr_send = GetExponentialRand(current_time, AVG_ADDRESS_BROADCAST_INTERVAL);
|
|
|
|
if (!Assume(peer.m_addrs_to_send.size() <= MAX_ADDR_TO_SEND)) {
|
|
// Should be impossible since we always check size before adding to
|
|
// m_addrs_to_send. Recover by trimming the vector.
|
|
peer.m_addrs_to_send.resize(MAX_ADDR_TO_SEND);
|
|
}
|
|
|
|
// Remove addr records that the peer already knows about, and add new
|
|
// addrs to the m_addr_known filter on the same pass.
|
|
auto addr_already_known = [&peer](const CAddress& addr) EXCLUSIVE_LOCKS_REQUIRED(g_msgproc_mutex) {
|
|
bool ret = peer.m_addr_known->contains(addr.GetKey());
|
|
if (!ret) peer.m_addr_known->insert(addr.GetKey());
|
|
return ret;
|
|
};
|
|
peer.m_addrs_to_send.erase(std::remove_if(peer.m_addrs_to_send.begin(), peer.m_addrs_to_send.end(), addr_already_known),
|
|
peer.m_addrs_to_send.end());
|
|
|
|
// No addr messages to send
|
|
if (peer.m_addrs_to_send.empty()) return;
|
|
|
|
const char* msg_type;
|
|
int make_flags;
|
|
if (peer.m_wants_addrv2) {
|
|
msg_type = NetMsgType::ADDRV2;
|
|
make_flags = ADDRV2_FORMAT;
|
|
} else {
|
|
msg_type = NetMsgType::ADDR;
|
|
make_flags = 0;
|
|
}
|
|
m_connman.PushMessage(&node, CNetMsgMaker(node.GetCommonVersion()).Make(make_flags, msg_type, peer.m_addrs_to_send));
|
|
peer.m_addrs_to_send.clear();
|
|
|
|
// we only send the big addr message once
|
|
if (peer.m_addrs_to_send.capacity() > 40) {
|
|
peer.m_addrs_to_send.shrink_to_fit();
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
class CompareInvMempoolOrder
|
|
{
|
|
CTxMemPool *mp;
|
|
public:
|
|
explicit CompareInvMempoolOrder(CTxMemPool *_mempool)
|
|
{
|
|
mp = _mempool;
|
|
}
|
|
|
|
bool operator()(std::set<uint256>::iterator a, std::set<uint256>::iterator b)
|
|
{
|
|
/* As std::make_heap produces a max-heap, we want the entries with the
|
|
* fewest ancestors/highest fee to sort later. */
|
|
return mp->CompareDepthAndScore(*b, *a);
|
|
}
|
|
};
|
|
} // namespace
|
|
|
|
bool PeerManagerImpl::RejectIncomingTxs(const CNode& peer) const
|
|
{
|
|
// block-relay-only peers may never send txs to us
|
|
if (peer.IsBlockOnlyConn()) return true;
|
|
// In -blocksonly mode, peers need the 'relay' permission to send txs to us
|
|
if (m_ignore_incoming_txs && !peer.HasPermission(NetPermissionFlags::Relay)) return true;
|
|
return false;
|
|
}
|
|
|
|
bool PeerManagerImpl::SetupAddressRelay(const CNode& node, Peer& peer)
|
|
{
|
|
// We don't participate in addr relay with outbound block-relay-only
|
|
// connections to prevent providing adversaries with the additional
|
|
// information of addr traffic to infer the link.
|
|
if (node.IsBlockOnlyConn()) return false;
|
|
|
|
if (!peer.m_addr_relay_enabled.exchange(true)) {
|
|
// First addr message we have received from the peer, initialize
|
|
// m_addr_known
|
|
peer.m_addr_known = std::make_unique<CRollingBloomFilter>(5000, 0.001);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool PeerManagerImpl::SendMessages(CNode* pto)
|
|
{
|
|
AssertLockHeld(g_msgproc_mutex);
|
|
|
|
assert(m_llmq_ctx);
|
|
|
|
const bool is_masternode = m_mn_activeman != nullptr;
|
|
|
|
PeerRef peer = GetPeerRef(pto->GetId());
|
|
if (!peer) return false;
|
|
const Consensus::Params& consensusParams = m_chainparams.GetConsensus();
|
|
|
|
// We must call MaybeDiscourageAndDisconnect first, to ensure that we'll
|
|
// disconnect misbehaving peers even before the version handshake is complete.
|
|
if (MaybeDiscourageAndDisconnect(*pto, *peer)) return true;
|
|
|
|
// Don't send anything until the version handshake is complete
|
|
if (!pto->fSuccessfullyConnected || pto->fDisconnect)
|
|
return true;
|
|
|
|
// If we get here, the outgoing message serialization version is set and can't change.
|
|
const CNetMsgMaker msgMaker(pto->GetCommonVersion());
|
|
|
|
const auto current_time{GetTime<std::chrono::microseconds>()};
|
|
|
|
if (pto->IsAddrFetchConn() && current_time - pto->m_connected > 10 * AVG_ADDRESS_BROADCAST_INTERVAL) {
|
|
LogPrint(BCLog::NET_NETCONN, "addrfetch connection timeout; disconnecting peer=%d\n", pto->GetId());
|
|
pto->fDisconnect = true;
|
|
return true;
|
|
}
|
|
|
|
MaybeSendPing(*pto, *peer, current_time);
|
|
|
|
// MaybeSendPing may have marked peer for disconnection
|
|
if (pto->fDisconnect) return true;
|
|
|
|
MaybeSendAddr(*pto, *peer, current_time);
|
|
|
|
{
|
|
LOCK(cs_main);
|
|
|
|
CNodeState &state = *State(pto->GetId());
|
|
|
|
// Start block sync
|
|
if (m_chainman.m_best_header == nullptr) {
|
|
m_chainman.m_best_header = m_chainman.ActiveChain().Tip();
|
|
}
|
|
|
|
// Determine whether we might try initial headers sync or parallel
|
|
// block download from this peer -- this mostly affects behavior while
|
|
// in IBD (once out of IBD, we sync from all peers).
|
|
bool sync_blocks_and_headers_from_peer = false;
|
|
if (state.fPreferredDownload) {
|
|
sync_blocks_and_headers_from_peer = true;
|
|
} else if (CanServeBlocks(*peer) && !pto->IsAddrFetchConn()) {
|
|
// Typically this is an inbound peer. If we don't have any outbound
|
|
// peers, or if we aren't downloading any blocks from such peers,
|
|
// then allow block downloads from this peer, too.
|
|
// We prefer downloading blocks from outbound peers to avoid
|
|
// putting undue load on (say) some home user who is just making
|
|
// outbound connections to the network, but if our only source of
|
|
// the latest blocks is from an inbound peer, we have to be sure to
|
|
// eventually download it (and not just wait indefinitely for an
|
|
// outbound peer to have it).
|
|
if (m_num_preferred_download_peers == 0 || mapBlocksInFlight.empty()) {
|
|
sync_blocks_and_headers_from_peer = true;
|
|
}
|
|
}
|
|
|
|
if (!state.fSyncStarted && CanServeBlocks(*peer) && !fImporting && !fReindex && pto->CanRelay()) {
|
|
// Only actively request headers from a single peer, unless we're close to end of initial download.
|
|
if ((nSyncStarted == 0 && sync_blocks_and_headers_from_peer) || m_chainman.m_best_header->GetBlockTime() > GetAdjustedTime() - nMaxTipAge) {
|
|
const CBlockIndex* pindexStart = m_chainman.m_best_header;
|
|
/* If possible, start at the block preceding the currently
|
|
best known header. This ensures that we always get a
|
|
non-empty list of headers back as long as the peer
|
|
is up-to-date. With a non-empty response, we can initialise
|
|
the peer's known best block. This wouldn't be possible
|
|
if we requested starting at m_chainman.m_best_header and
|
|
got back an empty response. */
|
|
if (pindexStart->pprev)
|
|
pindexStart = pindexStart->pprev;
|
|
std::string msg_type = UsesCompressedHeaders(*peer) ? NetMsgType::GETHEADERS2 : NetMsgType::GETHEADERS;
|
|
if (MaybeSendGetHeaders(*pto, msg_type, m_chainman.ActiveChain().GetLocator(pindexStart), *peer)) {
|
|
LogPrint(BCLog::NET, "initial %s (%d) to peer=%d (startheight:%d)\n", msg_type, pindexStart->nHeight, pto->GetId(), peer->m_starting_height);
|
|
|
|
state.fSyncStarted = true;
|
|
state.m_headers_sync_timeout = current_time + HEADERS_DOWNLOAD_TIMEOUT_BASE +
|
|
(
|
|
// Convert HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER to microseconds before scaling
|
|
// to maintain precision
|
|
std::chrono::microseconds{HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER} *
|
|
(GetAdjustedTime() - m_chainman.m_best_header->GetBlockTime()) / consensusParams.nPowTargetSpacing
|
|
);
|
|
nSyncStarted++;
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Try sending block announcements via headers
|
|
//
|
|
if (pto->CanRelay()) {
|
|
// If we have no more than MAX_BLOCKS_TO_ANNOUNCE in our
|
|
// list of block hashes we're relaying, and our peer wants
|
|
// headers announcements, then find the first header
|
|
// not yet known to our peer but would connect, and send.
|
|
// If no header would connect, or if we have too many
|
|
// blocks, or if the peer doesn't want headers, just
|
|
// add all to the inv queue.
|
|
LOCK(peer->m_block_inv_mutex);
|
|
std::vector<CBlock> vHeaders;
|
|
bool fRevertToInv = ((!state.fPreferHeaders && !state.fPreferHeadersCompressed &&
|
|
(!state.m_requested_hb_cmpctblocks || peer->m_blocks_for_headers_relay.size() > 1)) ||
|
|
peer->m_blocks_for_headers_relay.size() > MAX_BLOCKS_TO_ANNOUNCE);
|
|
const CBlockIndex *pBestIndex = nullptr; // last header queued for delivery
|
|
ProcessBlockAvailability(pto->GetId()); // ensure pindexBestKnownBlock is up-to-date
|
|
|
|
if (!fRevertToInv) {
|
|
bool fFoundStartingHeader = false;
|
|
// Try to find first header that our peer doesn't have, and
|
|
// then send all headers past that one. If we come across any
|
|
// headers that aren't on m_chainman.ActiveChain(), give up.
|
|
for (const uint256& hash : peer->m_blocks_for_headers_relay) {
|
|
const CBlockIndex* pindex = m_chainman.m_blockman.LookupBlockIndex(hash);
|
|
assert(pindex);
|
|
if (m_chainman.ActiveChain()[pindex->nHeight] != pindex) {
|
|
// Bail out if we reorged away from this block
|
|
fRevertToInv = true;
|
|
break;
|
|
}
|
|
if (pBestIndex != nullptr && pindex->pprev != pBestIndex) {
|
|
// This means that the list of blocks to announce don't
|
|
// connect to each other.
|
|
// This shouldn't really be possible to hit during
|
|
// regular operation (because reorgs should take us to
|
|
// a chain that has some block not on the prior chain,
|
|
// which should be caught by the prior check), but one
|
|
// way this could happen is by using invalidateblock /
|
|
// reconsiderblock repeatedly on the tip, causing it to
|
|
// be added multiple times to m_blocks_for_headers_relay.
|
|
// Robustly deal with this rare situation by reverting
|
|
// to an inv.
|
|
fRevertToInv = true;
|
|
break;
|
|
}
|
|
pBestIndex = pindex;
|
|
bool isPrevDevnetGenesisBlock = false;
|
|
if (!consensusParams.hashDevnetGenesisBlock.IsNull() &&
|
|
pindex->pprev != nullptr &&
|
|
pindex->pprev->GetBlockHash() == consensusParams.hashDevnetGenesisBlock) {
|
|
// even though the devnet genesis block was never transferred through the wire and thus not
|
|
// appear anywhere in the node state where we track what other nodes have or not have, we can
|
|
// assume that the other node already knows the devnet genesis block
|
|
isPrevDevnetGenesisBlock = true;
|
|
}
|
|
if (fFoundStartingHeader) {
|
|
// add this to the headers message
|
|
vHeaders.push_back(pindex->GetBlockHeader());
|
|
} else if (PeerHasHeader(&state, pindex)) {
|
|
continue; // keep looking for the first new block
|
|
} else if (pindex->pprev == nullptr || PeerHasHeader(&state, pindex->pprev) || isPrevDevnetGenesisBlock) {
|
|
// Peer doesn't have this header but they do have the prior one.
|
|
// Start sending headers.
|
|
fFoundStartingHeader = true;
|
|
vHeaders.push_back(pindex->GetBlockHeader());
|
|
} else {
|
|
// Peer doesn't have this header or the prior one -- nothing will
|
|
// connect, so bail out.
|
|
fRevertToInv = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!fRevertToInv && !vHeaders.empty()) {
|
|
if (vHeaders.size() == 1 && state.m_requested_hb_cmpctblocks) {
|
|
// We only send up to 1 block as header-and-ids, as otherwise
|
|
// probably means we're doing an initial-ish-sync or they're slow
|
|
LogPrint(BCLog::NET, "%s sending header-and-ids %s to peer=%d\n", __func__,
|
|
vHeaders.front().GetHash().ToString(), pto->GetId());
|
|
|
|
std::optional<CSerializedNetMsg> cached_cmpctblock_msg;
|
|
{
|
|
LOCK(m_most_recent_block_mutex);
|
|
if (m_most_recent_block_hash == pBestIndex->GetBlockHash()) {
|
|
cached_cmpctblock_msg = msgMaker.Make(NetMsgType::CMPCTBLOCK, *m_most_recent_compact_block);
|
|
}
|
|
}
|
|
if (cached_cmpctblock_msg.has_value()) {
|
|
m_connman.PushMessage(pto, std::move(cached_cmpctblock_msg.value()));
|
|
} else {
|
|
CBlock block;
|
|
bool ret = ReadBlockFromDisk(block, pBestIndex, consensusParams);
|
|
assert(ret);
|
|
CBlockHeaderAndShortTxIDs cmpctblock{block};
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::CMPCTBLOCK, cmpctblock));
|
|
}
|
|
state.pindexBestHeaderSent = pBestIndex;
|
|
} else if (state.fPreferHeadersCompressed) {
|
|
std::vector<CompressibleBlockHeader> vHeadersCompressed;
|
|
std::list<int32_t> last_unique_versions;
|
|
|
|
// Save other headers compressed
|
|
std::for_each(vHeaders.cbegin(), vHeaders.cend(), [&vHeadersCompressed, &last_unique_versions](const auto& block) {
|
|
CompressibleBlockHeader compressible_header{block.GetBlockHeader()};
|
|
compressible_header.Compress(vHeadersCompressed, last_unique_versions);
|
|
vHeadersCompressed.push_back(compressible_header);
|
|
});
|
|
|
|
// Push message to peer
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::HEADERS2, vHeadersCompressed));
|
|
state.pindexBestHeaderSent = pBestIndex;
|
|
} else if (state.fPreferHeaders) {
|
|
if (vHeaders.size() > 1) {
|
|
LogPrint(BCLog::NET, "%s: %u headers, range (%s, %s), to peer=%d\n", __func__,
|
|
vHeaders.size(),
|
|
vHeaders.front().GetHash().ToString(),
|
|
vHeaders.back().GetHash().ToString(), pto->GetId());
|
|
} else {
|
|
LogPrint(BCLog::NET, "%s: sending header %s to peer=%d\n", __func__,
|
|
vHeaders.front().GetHash().ToString(), pto->GetId());
|
|
}
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::HEADERS, vHeaders));
|
|
state.pindexBestHeaderSent = pBestIndex;
|
|
} else
|
|
fRevertToInv = true;
|
|
}
|
|
if (fRevertToInv) {
|
|
// If falling back to using an inv, just try to inv the tip.
|
|
// The last entry in m_blocks_for_headers_relay was our tip at some point
|
|
// in the past.
|
|
if (!peer->m_blocks_for_headers_relay.empty()) {
|
|
const uint256& hashToAnnounce = peer->m_blocks_for_headers_relay.back();
|
|
const CBlockIndex* pindex = m_chainman.m_blockman.LookupBlockIndex(hashToAnnounce);
|
|
assert(pindex);
|
|
|
|
// Warn if we're announcing a block that is not on the main chain.
|
|
// This should be very rare and could be optimized out.
|
|
// Just log for now.
|
|
if (m_chainman.ActiveChain()[pindex->nHeight] != pindex) {
|
|
LogPrint(BCLog::NET, "Announcing block %s not on main chain (tip=%s)\n",
|
|
hashToAnnounce.ToString(), m_chainman.ActiveChain().Tip()->GetBlockHash().ToString());
|
|
}
|
|
|
|
// If the peer's chain has this block, don't inv it back.
|
|
if (!PeerHasHeader(&state, pindex)) {
|
|
peer->m_blocks_for_inv_relay.push_back(hashToAnnounce);
|
|
LogPrint(BCLog::NET, "%s: sending inv peer=%d hash=%s\n", __func__,
|
|
pto->GetId(), hashToAnnounce.ToString());
|
|
}
|
|
}
|
|
}
|
|
peer->m_blocks_for_headers_relay.clear();
|
|
}
|
|
|
|
//
|
|
// Message: inventory
|
|
//
|
|
std::vector<CInv> vInv;
|
|
{
|
|
LOCK(peer->m_block_inv_mutex);
|
|
|
|
size_t reserve = INVENTORY_BROADCAST_MAX_PER_1MB_BLOCK * MaxBlockSize() / 1000000;
|
|
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
|
|
LOCK(tx_relay->m_tx_inventory_mutex);
|
|
reserve = std::min<size_t>(tx_relay->m_tx_inventory_to_send.size(), reserve);
|
|
}
|
|
reserve = std::max<size_t>(reserve, peer->m_blocks_for_inv_relay.size());
|
|
reserve = std::min<size_t>(reserve, MAX_INV_SZ);
|
|
vInv.reserve(reserve);
|
|
|
|
// Add blocks
|
|
for (const uint256& hash : peer->m_blocks_for_inv_relay) {
|
|
vInv.push_back(CInv(MSG_BLOCK, hash));
|
|
if (vInv.size() == MAX_INV_SZ) {
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::INV, vInv));
|
|
vInv.clear();
|
|
}
|
|
}
|
|
peer->m_blocks_for_inv_relay.clear();
|
|
}
|
|
|
|
auto queueAndMaybePushInv = [this, pto, peer, &vInv, &msgMaker](const CInv& invIn) {
|
|
LogPrint(BCLog::NET, "SendMessages -- queued inv: %s index=%d peer=%d\n", invIn.ToString(), vInv.size(), pto->GetId());
|
|
// Responses to MEMPOOL requests bypass the m_recently_announced_invs filter.
|
|
vInv.push_back(invIn);
|
|
if (vInv.size() == MAX_INV_SZ) {
|
|
LogPrint(BCLog::NET, "SendMessages -- pushing invs: count=%d peer=%d\n", vInv.size(), pto->GetId());
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::INV, vInv));
|
|
vInv.clear();
|
|
}
|
|
};
|
|
|
|
if (auto tx_relay = peer->GetTxRelay(); tx_relay != nullptr) {
|
|
LOCK(tx_relay->m_tx_inventory_mutex);
|
|
// Check whether periodic sends should happen
|
|
// Note: If this node is running in a Masternode mode, it makes no sense to delay outgoing txes
|
|
// because we never produce any txes ourselves i.e. no privacy is lost in this case.
|
|
bool fSendTrickle = pto->HasPermission(NetPermissionFlags::NoBan) || is_masternode;
|
|
if (tx_relay->m_next_inv_send_time < current_time) {
|
|
fSendTrickle = true;
|
|
if (pto->IsInboundConn()) {
|
|
tx_relay->m_next_inv_send_time = NextInvToInbounds(current_time, INBOUND_INVENTORY_BROADCAST_INTERVAL);
|
|
} else {
|
|
// Use half the delay for Masternode outbound peers, as there is less privacy concern for them.
|
|
tx_relay->m_next_inv_send_time = pto->GetVerifiedProRegTxHash().IsNull() ?
|
|
GetExponentialRand(current_time, OUTBOUND_INVENTORY_BROADCAST_INTERVAL) :
|
|
GetExponentialRand(current_time, OUTBOUND_INVENTORY_BROADCAST_INTERVAL / 2);
|
|
}
|
|
}
|
|
|
|
// Time to send but the peer has requested we not relay transactions.
|
|
if (fSendTrickle) {
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
if (!tx_relay->m_relay_txs) tx_relay->m_tx_inventory_to_send.clear();
|
|
}
|
|
|
|
// Respond to BIP35 mempool requests
|
|
if (fSendTrickle && tx_relay->m_send_mempool) {
|
|
auto vtxinfo = m_mempool.infoAll();
|
|
tx_relay->m_send_mempool = false;
|
|
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
|
|
// Send invs for txes and corresponding IS-locks
|
|
for (const auto& txinfo : vtxinfo) {
|
|
const uint256& hash = txinfo.tx->GetHash();
|
|
tx_relay->m_tx_inventory_to_send.erase(hash);
|
|
if (tx_relay->m_bloom_filter && !tx_relay->m_bloom_filter->IsRelevantAndUpdate(*txinfo.tx)) continue;
|
|
|
|
int nInvType = m_cj_ctx->dstxman->GetDSTX(hash) ? MSG_DSTX : MSG_TX;
|
|
tx_relay->m_tx_inventory_known_filter.insert(hash);
|
|
queueAndMaybePushInv(CInv(nInvType, hash));
|
|
|
|
const auto islock = m_llmq_ctx->isman->GetInstantSendLockByTxid(hash);
|
|
if (islock == nullptr) continue;
|
|
if (pto->nVersion < ISDLOCK_PROTO_VERSION) continue;
|
|
uint256 isLockHash{::SerializeHash(*islock)};
|
|
tx_relay->m_tx_inventory_known_filter.insert(isLockHash);
|
|
queueAndMaybePushInv(CInv(MSG_ISDLOCK, isLockHash));
|
|
}
|
|
|
|
// Send an inv for the best ChainLock we have
|
|
const auto& clsig = m_llmq_ctx->clhandler->GetBestChainLock();
|
|
if (!clsig.IsNull()) {
|
|
uint256 chainlockHash{::SerializeHash(clsig)};
|
|
tx_relay->m_tx_inventory_known_filter.insert(chainlockHash);
|
|
queueAndMaybePushInv(CInv(MSG_CLSIG, chainlockHash));
|
|
}
|
|
tx_relay->m_last_mempool_req = std::chrono::duration_cast<std::chrono::seconds>(current_time);
|
|
}
|
|
|
|
// Determine transactions to relay
|
|
if (fSendTrickle) {
|
|
LOCK(tx_relay->m_bloom_filter_mutex);
|
|
|
|
// Produce a vector with all candidates for sending
|
|
std::vector<std::set<uint256>::iterator> vInvTx;
|
|
vInvTx.reserve(tx_relay->m_tx_inventory_to_send.size());
|
|
for (std::set<uint256>::iterator it = tx_relay->m_tx_inventory_to_send.begin(); it != tx_relay->m_tx_inventory_to_send.end(); it++) {
|
|
vInvTx.push_back(it);
|
|
}
|
|
// Topologically and fee-rate sort the inventory we send for privacy and priority reasons.
|
|
// A heap is used so that not all items need sorting if only a few are being sent.
|
|
CompareInvMempoolOrder compareInvMempoolOrder(&m_mempool);
|
|
std::make_heap(vInvTx.begin(), vInvTx.end(), compareInvMempoolOrder);
|
|
// No reason to drain out at many times the network's capacity,
|
|
// especially since we have many peers and some will draw much shorter delays.
|
|
unsigned int nRelayedTransactions = 0;
|
|
size_t broadcast_max{INVENTORY_BROADCAST_MAX_PER_1MB_BLOCK * MaxBlockSize() / 1000000 + (tx_relay->m_tx_inventory_to_send.size()/1000)*5};
|
|
broadcast_max = std::min<size_t>(1000, broadcast_max);
|
|
|
|
while (!vInvTx.empty() && nRelayedTransactions < broadcast_max) {
|
|
// Fetch the top element from the heap
|
|
std::pop_heap(vInvTx.begin(), vInvTx.end(), compareInvMempoolOrder);
|
|
std::set<uint256>::iterator it = vInvTx.back();
|
|
vInvTx.pop_back();
|
|
uint256 hash = *it;
|
|
// Remove it from the to-be-sent set
|
|
tx_relay->m_tx_inventory_to_send.erase(it);
|
|
// Check if not in the filter already
|
|
if (tx_relay->m_tx_inventory_known_filter.contains(hash)) {
|
|
continue;
|
|
}
|
|
// Not in the mempool anymore? don't bother sending it.
|
|
auto txinfo = m_mempool.info(hash);
|
|
if (!txinfo.tx) {
|
|
continue;
|
|
}
|
|
if (tx_relay->m_bloom_filter && !tx_relay->m_bloom_filter->IsRelevantAndUpdate(*txinfo.tx)) continue;
|
|
// Send
|
|
State(pto->GetId())->m_recently_announced_invs.insert(hash);
|
|
nRelayedTransactions++;
|
|
{
|
|
// Expire old relay messages
|
|
while (!g_relay_expiration.empty() && g_relay_expiration.front().first < current_time)
|
|
{
|
|
mapRelay.erase(g_relay_expiration.front().second);
|
|
g_relay_expiration.pop_front();
|
|
}
|
|
|
|
auto ret = mapRelay.emplace(hash, std::move(txinfo.tx));
|
|
if (ret.second) {
|
|
g_relay_expiration.emplace_back(current_time + RELAY_TX_CACHE_TIME, ret.first);
|
|
}
|
|
}
|
|
int nInvType = m_cj_ctx->dstxman->GetDSTX(hash) ? MSG_DSTX : MSG_TX;
|
|
tx_relay->m_tx_inventory_known_filter.insert(hash);
|
|
queueAndMaybePushInv(CInv(nInvType, hash));
|
|
}
|
|
}
|
|
}
|
|
{
|
|
auto inv_relay = peer->GetInvRelay();
|
|
|
|
// Send non-tx/non-block inventory items
|
|
LOCK2(inv_relay->m_tx_inventory_mutex, inv_relay->m_bloom_filter_mutex);
|
|
|
|
bool fSendIS = inv_relay->m_relay_txs && !pto->IsBlockRelayOnly();
|
|
|
|
for (const auto& inv : inv_relay->vInventoryOtherToSend) {
|
|
if (!inv_relay->m_relay_txs && NetMessageViolatesBlocksOnly(inv.GetCommand())) {
|
|
continue;
|
|
}
|
|
if (inv_relay->m_tx_inventory_known_filter.contains(inv.hash)) {
|
|
continue;
|
|
}
|
|
if (!fSendIS && inv.type == MSG_ISDLOCK) {
|
|
continue;
|
|
}
|
|
inv_relay->m_tx_inventory_known_filter.insert(inv.hash);
|
|
queueAndMaybePushInv(inv);
|
|
}
|
|
inv_relay->vInventoryOtherToSend.clear();
|
|
}
|
|
if (!vInv.empty())
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::INV, vInv));
|
|
|
|
// Detect whether we're stalling
|
|
auto stalling_timeout = m_block_stalling_timeout.load();
|
|
if (state.m_stalling_since.count() && state.m_stalling_since < current_time - stalling_timeout) {
|
|
// Stalling only triggers when the block download window cannot move. During normal steady state,
|
|
// the download window should be much larger than the to-be-downloaded set of blocks, so disconnection
|
|
// should only happen during initial block download.
|
|
LogPrintf("Peer=%d%s is stalling block download, disconnecting\n", pto->GetId(), fLogIPs ? strprintf(" peeraddr=%s", pto->addr.ToStringAddrPort()) : "");
|
|
pto->fDisconnect = true;
|
|
// Increase timeout for the next peer so that we don't disconnect multiple peers if our own
|
|
// bandwidth is insufficient.
|
|
const auto new_timeout = std::min(2 * stalling_timeout, BLOCK_STALLING_TIMEOUT_MAX);
|
|
if (stalling_timeout != new_timeout && m_block_stalling_timeout.compare_exchange_strong(stalling_timeout, new_timeout)) {
|
|
LogPrint(BCLog::NET, "Increased stalling timeout temporarily to %d seconds\n", count_seconds(new_timeout));
|
|
}
|
|
return true;
|
|
}
|
|
// In case there is a block that has been in flight from this peer for block_interval * (1 + 0.5 * N)
|
|
// (with N the number of peers from which we're downloading validated blocks), disconnect due to timeout.
|
|
// We compensate for other peers to prevent killing off peers due to our own downstream link
|
|
// being saturated. We only count validated in-flight blocks so peers can't advertise non-existing block hashes
|
|
// to unreasonably increase our timeout.
|
|
if (state.vBlocksInFlight.size() > 0) {
|
|
QueuedBlock &queuedBlock = state.vBlocksInFlight.front();
|
|
int nOtherPeersWithValidatedDownloads = m_peers_downloading_from - 1;
|
|
if (current_time > state.m_downloading_since + std::chrono::seconds{consensusParams.nPowTargetSpacing} * (BLOCK_DOWNLOAD_TIMEOUT_BASE + BLOCK_DOWNLOAD_TIMEOUT_PER_PEER * nOtherPeersWithValidatedDownloads)) {
|
|
LogPrintf("Timeout downloading block %s from peer=%d%s, disconnecting\n", queuedBlock.pindex->GetBlockHash().ToString(), pto->GetId(), fLogIPs ? strprintf(" peeraddr=%s", pto->addr.ToStringAddrPort()) : "");
|
|
pto->fDisconnect = true;
|
|
return true;
|
|
}
|
|
}
|
|
// Check for headers sync timeouts
|
|
if (state.fSyncStarted && state.m_headers_sync_timeout < std::chrono::microseconds::max()) {
|
|
// Detect whether this is a stalling initial-headers-sync peer
|
|
if (m_chainman.m_best_header->GetBlockTime() <= GetAdjustedTime() - nMaxTipAge) {
|
|
if (current_time > state.m_headers_sync_timeout && nSyncStarted == 1 && (m_num_preferred_download_peers - state.fPreferredDownload >= 1)) {
|
|
// Disconnect a peer (without NetPermissionFlags::NoBan permission) if it is our only sync peer,
|
|
// and we have others we could be using instead.
|
|
// Note: If all our peers are inbound, then we won't
|
|
// disconnect our sync peer for stalling; we have bigger
|
|
// problems if we can't get any outbound peers.
|
|
if (!pto->HasPermission(NetPermissionFlags::NoBan)) {
|
|
LogPrintf("Timeout downloading headers from peer=%d%s, disconnecting\n", pto->GetId(), fLogIPs ? strprintf(" peeraddr=%s", pto->addr.ToStringAddrPort()) : "");
|
|
pto->fDisconnect = true;
|
|
return true;
|
|
} else {
|
|
LogPrintf("Timeout downloading headers from noban peer=%d%s, not disconnecting\n", pto->GetId(), fLogIPs ? strprintf(" peeraddr=%s", pto->addr.ToStringAddrPort()) : "");
|
|
// Reset the headers sync state so that we have a
|
|
// chance to try downloading from a different peer.
|
|
// Note: this will also result in at least one more
|
|
// getheaders message to be sent to
|
|
// this peer (eventually).
|
|
state.fSyncStarted = false;
|
|
nSyncStarted--;
|
|
state.m_headers_sync_timeout = 0us;
|
|
}
|
|
}
|
|
} else {
|
|
// After we've caught up once, reset the timeout so we can't trigger
|
|
// disconnect later.
|
|
state.m_headers_sync_timeout = std::chrono::microseconds::max();
|
|
}
|
|
}
|
|
|
|
// Check that outbound peers have reasonable chains
|
|
// GetTime() is used by this anti-DoS logic so we can test this using mocktime
|
|
ConsiderEviction(*pto, *peer, GetTime<std::chrono::seconds>());
|
|
|
|
//
|
|
// Message: getdata (blocks)
|
|
//
|
|
std::vector<CInv> vGetData;
|
|
if (CanServeBlocks(*peer) && pto->CanRelay() && ((sync_blocks_and_headers_from_peer && !IsLimitedPeer(*peer)) || !m_chainman.ActiveChainstate().IsInitialBlockDownload()) && state.nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) {
|
|
std::vector<const CBlockIndex*> vToDownload;
|
|
NodeId staller = -1;
|
|
FindNextBlocksToDownload(*peer, MAX_BLOCKS_IN_TRANSIT_PER_PEER - state.nBlocksInFlight, vToDownload, staller);
|
|
for (const CBlockIndex *pindex : vToDownload) {
|
|
vGetData.push_back(CInv(MSG_BLOCK, pindex->GetBlockHash()));
|
|
BlockRequested(pto->GetId(), *pindex);
|
|
LogPrint(BCLog::NET, "Requesting block %s (%d) peer=%d\n", pindex->GetBlockHash().ToString(),
|
|
pindex->nHeight, pto->GetId());
|
|
}
|
|
if (state.nBlocksInFlight == 0 && staller != -1) {
|
|
if (State(staller)->m_stalling_since == 0us) {
|
|
State(staller)->m_stalling_since = current_time;
|
|
LogPrint(BCLog::NET, "Stall started peer=%d\n", staller);
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Message: getdata (non-blocks)
|
|
//
|
|
|
|
// For robustness, expire old requests after a long timeout, so that
|
|
// we can resume downloading objects from a peer even if they
|
|
// were unresponsive in the past.
|
|
// Eventually we should consider disconnecting peers, but this is
|
|
// conservative.
|
|
if (state.m_object_download.m_check_expiry_timer <= current_time) {
|
|
for (auto it=state.m_object_download.m_object_in_flight.begin(); it != state.m_object_download.m_object_in_flight.end();) {
|
|
if (it->second <= current_time - GetObjectExpiryInterval(it->first.type)) {
|
|
LogPrint(BCLog::NET, "timeout of inflight object %s from peer=%d\n", it->first.ToString(), pto->GetId());
|
|
state.m_object_download.m_object_announced.erase(it->first);
|
|
state.m_object_download.m_object_in_flight.erase(it++);
|
|
} else {
|
|
++it;
|
|
}
|
|
}
|
|
// On average, we do this check every GetObjectExpiryInterval. Randomize
|
|
// so that we're not doing this for all peers at the same time.
|
|
state.m_object_download.m_check_expiry_timer = current_time + GetObjectExpiryInterval(MSG_TX)/2 + GetRandMicros(GetObjectExpiryInterval(MSG_TX));
|
|
}
|
|
|
|
// DASH this code also handles non-TXs (Dash specific messages)
|
|
auto& object_process_time = state.m_object_download.m_object_process_time;
|
|
while (!object_process_time.empty() && object_process_time.begin()->first <= current_time && state.m_object_download.m_object_in_flight.size() < MAX_PEER_OBJECT_IN_FLIGHT) {
|
|
const CInv inv = object_process_time.begin()->second;
|
|
// Erase this entry from object_process_time (it may be added back for
|
|
// processing at a later time, see below)
|
|
object_process_time.erase(object_process_time.begin());
|
|
if (g_erased_object_requests.count(inv.hash)) {
|
|
LogPrint(BCLog::NET, "%s -- GETDATA skipping inv=(%s), peer=%d\n", __func__, inv.ToString(), pto->GetId());
|
|
state.m_object_download.m_object_announced.erase(inv);
|
|
state.m_object_download.m_object_in_flight.erase(inv);
|
|
continue;
|
|
}
|
|
if (!AlreadyHave(inv)) {
|
|
// If this object was last requested more than GetObjectInterval ago,
|
|
// then request.
|
|
const auto last_request_time = GetObjectRequestTime(inv);
|
|
if (last_request_time <= current_time - GetObjectInterval(inv.type)) {
|
|
LogPrint(BCLog::NET, "Requesting %s peer=%d\n", inv.ToString(), pto->GetId());
|
|
vGetData.push_back(inv);
|
|
if (vGetData.size() >= MAX_GETDATA_SZ) {
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::GETDATA, vGetData));
|
|
vGetData.clear();
|
|
}
|
|
UpdateObjectRequestTime(inv, current_time);
|
|
state.m_object_download.m_object_in_flight.emplace(inv, current_time);
|
|
} else {
|
|
// This object is in flight from someone else; queue
|
|
// up processing to happen after the download times out
|
|
// (with a slight delay for inbound peers, to prefer
|
|
// requests to outbound peers).
|
|
const auto next_process_time = CalculateObjectGetDataTime(inv, current_time, is_masternode, !state.fPreferredDownload);
|
|
object_process_time.emplace(next_process_time, inv);
|
|
LogPrint(BCLog::NET, "%s -- GETDATA re-queue inv=(%s), next_process_time=%d, delta=%d, peer=%d\n", __func__, inv.ToString(), next_process_time.count(), (next_process_time - current_time).count(), pto->GetId());
|
|
}
|
|
} else {
|
|
// We have already seen this object, no need to download.
|
|
state.m_object_download.m_object_announced.erase(inv);
|
|
state.m_object_download.m_object_in_flight.erase(inv);
|
|
LogPrint(BCLog::NET, "%s -- GETDATA already seen inv=(%s), peer=%d\n", __func__, inv.ToString(), pto->GetId());
|
|
}
|
|
}
|
|
|
|
|
|
if (!vGetData.empty()) {
|
|
m_connman.PushMessage(pto, msgMaker.Make(NetMsgType::GETDATA, vGetData));
|
|
LogPrint(BCLog::NET, "SendMessages -- GETDATA -- pushed size = %lu peer=%d\n", vGetData.size(), pto->GetId());
|
|
}
|
|
} // release cs_main
|
|
return true;
|
|
}
|