#include <net_processing.h>
#include <addrman.h>
#include <banman.h>
#include <blockencodings.h>
#include <blockfilter.h>
#include <chainparams.h>
#include <consensus/validation.h>
#include <hash.h>
#include <index/blockfilterindex.h>
#include <merkleblock.h>
#include <netbase.h>
#include <netmessagemaker.h>
#include <policy/fees.h>
#include <policy/policy.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <random.h>
#include <reverse_iterator.h>
#include <scheduler.h>
#include <streams.h>
#include <tinyformat.h>
#include <txmempool.h>
#include <txrequest.h>
#include <util/check.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <validation.h>
#include <memory>
#include <typeinfo>

Include dependency graph for net_processing.cpp:

Classes
struct	COrphanTx

class	CNetProcessingCleanup

Functions
std::map< uint256, COrphanTx > mapOrphanTransactions	GUARDED_BY (g_cs_orphans)
	Map from txid to orphan transaction record. More...

void	EraseOrphansFor (NodeId peer)

void	UpdateLastBlockAnnounceTime (NodeId node, int64_t time_in_seconds)

static void	AddToCompactExtraTransactions (const CTransactionRef &tx) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)

bool	AddOrphanTx (const CTransactionRef &tx, NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)

static int	EraseOrphanTx (uint256 hash) EXCLUSIVE_LOCKS_REQUIRED(g_cs_orphans)

unsigned int	LimitOrphanTxSize (unsigned int nMaxOrphans)

static bool	BlockRequestAllowed (const CBlockIndex *pindex, const Consensus::Params &consensusParams) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static std::shared_ptr< const CBlock > most_recent_block	GUARDED_BY (cs_most_recent_block)

static bool	AlreadyHaveTx (const GenTxid &gtxid, const CTxMemPool &mempool) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static bool	AlreadyHaveBlock (const uint256 &block_hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

void	RelayTransaction (const uint256 &txid, const uint256 &wtxid, const CConnman &connman)
	Relay transaction to every node. More...

static void	RelayAddress (const CNode &originator, const CAddress &addr, bool fReachable, const CConnman &connman)
	Relay (gossip) an address to a few randomly chosen nodes. More...

static void	ProcessGetBlockData (CNode &pfrom, Peer &peer, const CChainParams &chainparams, const CInv &inv, CConnman &connman)

static CTransactionRef	FindTxForGetData (const CTxMemPool &mempool, const CNode &peer, const GenTxid &gtxid, const std::chrono::seconds mempool_req, const std::chrono::seconds now) LOCKS_EXCLUDED(cs_main)
	Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed). More...

static void	ProcessGetData (CNode &pfrom, Peer &peer, const CChainParams &chainparams, CConnman &connman, CTxMemPool &mempool, const std::atomic< bool > &interruptMsgProc) EXCLUSIVE_LOCKS_REQUIRED(!cs_main

const CNetMsgMaker	msgMaker (pfrom.GetCommonVersion())

	while (it !=peer.m_getdata_requests.end() &&it->IsGenTxMsg())

	if (it !=peer.m_getdata_requests.end() &&!pfrom.fPauseSend)

peer m_getdata_requests	erase (peer.m_getdata_requests.begin(), it)

	if (!vNotFound.empty())

static uint32_t	GetFetchFlags (const CNode &pfrom) EXCLUSIVE_LOCKS_REQUIRED(cs_main)

static bool	PrepareBlockFilterRequest (CNode &peer, const CChainParams &chain_params, BlockFilterType filter_type, uint32_t start_height, const uint256 &stop_hash, uint32_t max_height_diff, const CBlockIndex &stop_index, BlockFilterIndex &filter_index)
	Validation logic for compact filters request handling. More...

static void	ProcessGetCFilters (CNode &peer, CDataStream &vRecv, const CChainParams &chain_params, CConnman &connman)
	Handle a cfilters request. More...

static void	ProcessGetCFHeaders (CNode &peer, CDataStream &vRecv, const CChainParams &chain_params, CConnman &connman)
	Handle a cfheaders request. More...

static void	ProcessGetCFCheckPt (CNode &peer, CDataStream &vRecv, const CChainParams &chain_params, CConnman &connman)
	Handle a getcfcheckpt request. More...

Variables
static constexpr int64_t	ORPHAN_TX_EXPIRE_TIME = 20 * 60
	Expiration time for orphan transactions in seconds. More...

static constexpr int64_t	ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60
	Minimum time between orphan transactions expire time checks in seconds. More...

static constexpr std::chrono::seconds	RELAY_TX_CACHE_TIME = std::chrono::minutes{15}
	How long to cache transactions in mapRelay for normal relay. More...

static constexpr std::chrono::seconds	UNCONDITIONAL_RELAY_DELAY = std::chrono::minutes{2}
	How long a transaction has to be in the mempool before it can unconditionally be relayed (even when not in mapRelay). More...

static constexpr int64_t	HEADERS_DOWNLOAD_TIMEOUT_BASE = 15 * 60 * 1000000
	Headers download timeout expressed in microseconds Timeout = base + per_header * (expected number of headers) More...

static constexpr int64_t	HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1000

static constexpr int32_t	MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT = 4
	Protect at least this many outbound peers from disconnection due to slow/ behind headers chain. More...

static constexpr int64_t	CHAIN_SYNC_TIMEOUT = 20 * 60
	Timeout for (unprotected) outbound peers to sync to our chainwork, in seconds. More...

static constexpr int64_t	STALE_CHECK_INTERVAL = 10 * 60
	How frequently to check for stale tips, in seconds. More...

static constexpr int64_t	EXTRA_PEER_CHECK_INTERVAL = 45
	How frequently to check for extra outbound peers and disconnect, in seconds. More...

static constexpr int64_t	MINIMUM_CONNECT_TIME = 30
	Minimum time an outbound-peer-eviction candidate must be connected for, in order to evict, in seconds. More...

static constexpr uint64_t	RANDOMIZER_ID_ADDRESS_RELAY = 0x3cac0035b5866b90ULL
	SHA256("main address relay")[0:8]. More...

static constexpr int	STALE_RELAY_AGE_LIMIT = 30 * 24 * 60 * 60
	Age after which a stale block will no longer be served if requested as protection against fingerprinting. More...

static constexpr int	HISTORICAL_BLOCK_AGE = 7 * 24 * 60 * 60
	Age after which a block is considered historical for purposes of rate limiting block relay. More...

static constexpr std::chrono::minutes	PING_INTERVAL {2}
	Time between pings automatically sent out for latency probing and keepalive. More...

static const unsigned int	MAX_LOCATOR_SZ = 101
	The maximum number of entries in a locator. More...

static const unsigned int	MAX_INV_SZ = 50000
	The maximum number of entries in an 'inv' protocol message. More...

static constexpr int32_t	MAX_PEER_TX_REQUEST_IN_FLIGHT = 100
	Maximum number of in-flight transaction requests from a peer. More...

static constexpr int32_t	MAX_PEER_TX_ANNOUNCEMENTS = 5000
	Maximum number of transactions to consider for requesting, per peer. More...

static constexpr auto	TXID_RELAY_DELAY = std::chrono::seconds{2}
	How long to delay requesting transactions via txids, if we have wtxid-relaying peers. More...

static constexpr auto	NONPREF_PEER_TX_DELAY = std::chrono::seconds{2}
	How long to delay requesting transactions from non-preferred peers. More...

static constexpr auto	OVERLOADED_PEER_TX_DELAY = std::chrono::seconds{2}
	How long to delay requesting transactions from overloaded peers (see MAX_PEER_TX_REQUEST_IN_FLIGHT). More...

static constexpr std::chrono::microseconds	GETDATA_TX_INTERVAL {std::chrono::seconds{60}}
	How long to wait (in microseconds) before downloading a transaction from an additional peer. More...

static const unsigned int	MAX_GETDATA_SZ = 1000
	Limit to avoid sending big packets. More...

static const int	MAX_BLOCKS_IN_TRANSIT_PER_PEER = 16
	Number of blocks that can be requested at any given time from a single peer. More...

static const unsigned int	BLOCK_STALLING_TIMEOUT = 2
	Timeout in seconds during which a peer must stall block download progress before being disconnected. More...

static const unsigned int	MAX_HEADERS_RESULTS = 2000
	Number of headers sent in one getheaders result. More...

static const int	MAX_CMPCTBLOCK_DEPTH = 5
	Maximum depth of blocks we're willing to serve as compact blocks to peers when requested. More...

static const int	MAX_BLOCKTXN_DEPTH = 10
	Maximum depth of blocks we're willing to respond to GETBLOCKTXN requests for. More...

static const unsigned int	BLOCK_DOWNLOAD_WINDOW = 1024
	Size of the "block download window": how far ahead of our current height do we fetch? Larger windows tolerate larger download speed differences between peer, but increase the potential degree of disordering of blocks on disk (which make reindexing and pruning harder). More...

static const int64_t	BLOCK_DOWNLOAD_TIMEOUT_BASE = 1000000
	Block download timeout base, expressed in millionths of the block interval (i.e. More...

static const int64_t	BLOCK_DOWNLOAD_TIMEOUT_PER_PEER = 500000
	Additional block download timeout per parallel downloading peer (i.e. More...

static const unsigned int	MAX_BLOCKS_TO_ANNOUNCE = 8
	Maximum number of headers to announce when relaying blocks with headers message. More...

static const int	MAX_UNCONNECTING_HEADERS = 10
	Maximum number of unconnecting headers announcements before DoS score. More...

static const unsigned int	NODE_NETWORK_LIMITED_MIN_BLOCKS = 288
	Minimum blocks required to signal NODE_NETWORK_LIMITED. More...

static constexpr std::chrono::hours	AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL {24}
	Average delay between local address broadcasts. More...

static constexpr std::chrono::seconds	AVG_ADDRESS_BROADCAST_INTERVAL {30}
	Average delay between peer address broadcasts. More...

static const unsigned int	INVENTORY_BROADCAST_INTERVAL = 5
	Average delay between trickled inventory transmissions in seconds. More...

static constexpr unsigned int	INVENTORY_BROADCAST_PER_SECOND = 7
	Maximum rate of inventory items to send per second. More...

static constexpr unsigned int	INVENTORY_BROADCAST_MAX = INVENTORY_BROADCAST_PER_SECOND * INVENTORY_BROADCAST_INTERVAL
	Maximum number of inventory items to send per transmission. More...

static constexpr unsigned int	INVENTORY_MAX_RECENT_RELAY = 3500
	The number of most recently announced transactions a peer can request. More...

static constexpr unsigned int	AVG_FEEFILTER_BROADCAST_INTERVAL = 10 * 60
	Verify that INVENTORY_MAX_RECENT_RELAY is enough to cache everything typically relayed before unconditional relay from the mempool kicks in. More...

static constexpr unsigned int	MAX_FEEFILTER_CHANGE_DELAY = 5 * 60
	Maximum feefilter broadcast delay after significant change. More...

static constexpr uint32_t	MAX_GETCFILTERS_SIZE = 1000
	Maximum number of compact filters that may be requested with one getcfilters. More...

static constexpr uint32_t	MAX_GETCFHEADERS_SIZE = 2000
	Maximum number of cf hashes that may be requested with one getcfheaders. More...

static constexpr size_t	MAX_PCT_ADDR_TO_SEND = 23
	the maximum percentage of addresses from our addrman to return in response to a getaddr message. More...

RecursiveMutex	g_cs_orphans
	Guards orphan transactions and extra txs for compact blocks. More...

static RecursiveMutex	cs_most_recent_block

static void peer	m_getdata_requests_mutex

std::deque< CInv >::iterator	it = peer.m_getdata_requests.begin()

std::vector< CInv >	vNotFound

const std::chrono::seconds	now = GetTime<std::chrono::seconds>()

const std::chrono::seconds	mempool_req

static CNetProcessingCleanup	instance_of_cnetprocessingcleanup

Function Documentation

◆ AddOrphanTx()

bool AddOrphanTx	(	const CTransactionRef &	tx,
		NodeId	peer
	)

Definition at line 1082 of file net_processing.cpp.

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◆ AddToCompactExtraTransactions()

static void AddToCompactExtraTransactions ( const CTransactionRef & tx )

static

Definition at line 1071 of file net_processing.cpp.

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◆ AlreadyHaveBlock()

static bool AlreadyHaveBlock ( const uint256 & block_hash )

static

Definition at line 1596 of file net_processing.cpp.

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◆ AlreadyHaveTx()

static bool AlreadyHaveTx	(	const GenTxid &	gtxid,
		const CTxMemPool &	mempool
	)

static

Definition at line 1565 of file net_processing.cpp.

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◆ BlockRequestAllowed()

static bool BlockRequestAllowed	(	const CBlockIndex *	pindex,
		const Consensus::Params &	consensusParams
	)

static

Definition at line 1307 of file net_processing.cpp.

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◆ erase()

peer m_getdata_requests erase	(	peer.m_getdata_requests.	begin(),
		it
	)

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◆ EraseOrphansFor()

void EraseOrphansFor ( NodeId peer )

Definition at line 1149 of file net_processing.cpp.

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◆ EraseOrphanTx()

static int EraseOrphanTx ( uint256 hash )

static

Definition at line 1118 of file net_processing.cpp.

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◆ FindTxForGetData()

static CTransactionRef FindTxForGetData	(	const CTxMemPool &	mempool,
		const CNode &	peer,
		const GenTxid &	gtxid,
		const std::chrono::seconds	mempool_req,
		const std::chrono::seconds	now
	)

static

Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed).

Definition at line 1828 of file net_processing.cpp.

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◆ GetFetchFlags()

static uint32_t GetFetchFlags ( const CNode & pfrom )

static

Definition at line 1949 of file net_processing.cpp.

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◆ GUARDED_BY() [1/2]

std::map< uint256, std::map< uint256, COrphanTx >::iterator > g_orphans_by_wtxid GUARDED_BY ( g_cs_orphans )

Map from txid to orphan transaction record.

Index from wtxid into the mapOrphanTransactions to lookup orphan transactions using their witness ids.

Limited by -maxorphantx/DEFAULT_MAX_ORPHAN_TRANSACTIONS

◆ GUARDED_BY() [2/2]

static bool fWitnessesPresentInMostRecentCompactBlock GUARDED_BY ( cs_most_recent_block )

static

◆ if() [1/2]

if ( it ! = peer.m_getdata_requests.end() && !pfrom.fPauseSend )

Definition at line 1919 of file net_processing.cpp.

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◆ if() [2/2]

if ( !vNotFound. empty() )

Definition at line 1930 of file net_processing.cpp.

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◆ LimitOrphanTxSize()

unsigned int LimitOrphanTxSize ( unsigned int nMaxOrphans )

Definition at line 1166 of file net_processing.cpp.

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◆ msgMaker()

const CNetMsgMaker msgMaker ( pfrom. GetCommonVersion() )

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◆ PrepareBlockFilterRequest()

static bool PrepareBlockFilterRequest	(	CNode &	peer,
		const CChainParams &	chain_params,
		BlockFilterType	filter_type,
		uint32_t	start_height,
		const uint256 &	stop_hash,
		uint32_t	max_height_diff,
		const CBlockIndex *&	stop_index,
		BlockFilterIndex *&	filter_index
	)

static

Validation logic for compact filters request handling.

May disconnect from the peer in the case of a bad request.

Parameters

[in]	peer	The peer that we received the request from
[in]	chain_params	Chain parameters
[in]	filter_type	The filter type the request is for. Must be basic filters.
[in]	start_height	The start height for the request
[in]	stop_hash	The stop_hash for the request
[in]	max_height_diff	The maximum number of items permitted to request, as specified in BIP 157
[out]	stop_index	The CBlockIndex for the stop_hash block, if the request can be serviced.
[out]	filter_index	The filter index, if the request can be serviced.

Returns: True if the request can be serviced.

Definition at line 2263 of file net_processing.cpp.

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◆ ProcessGetBlockData()

static void ProcessGetBlockData	(	CNode &	pfrom,
		Peer &	peer,
		const CChainParams &	chainparams,
		const CInv &	inv,
		CConnman &	connman
	)

static

Definition at line 1671 of file net_processing.cpp.

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◆ ProcessGetCFCheckPt()

static void ProcessGetCFCheckPt	(	CNode &	peer,
		CDataStream &	vRecv,
		const CChainParams &	chain_params,
		CConnman &	connman
	)

static

Handle a getcfcheckpt request.

May disconnect from the peer in the case of a bad request.

Parameters

[in]	peer	The peer that we received the request from
[in]	vRecv	The raw message received
[in]	chain_params	Chain parameters
[in]	connman	Pointer to the connection manager

Definition at line 2423 of file net_processing.cpp.

◆ ProcessGetCFHeaders()

static void ProcessGetCFHeaders	(	CNode &	peer,
		CDataStream &	vRecv,
		const CChainParams &	chain_params,
		CConnman &	connman
	)

static

Handle a cfheaders request.

May disconnect from the peer in the case of a bad request.

Parameters

[in]	peer	The peer that we received the request from
[in]	vRecv	The raw message received
[in]	chain_params	Chain parameters
[in]	connman	Pointer to the connection manager

Definition at line 2368 of file net_processing.cpp.

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◆ ProcessGetCFilters()

static void ProcessGetCFilters	(	CNode &	peer,
		CDataStream &	vRecv,
		const CChainParams &	chain_params,
		CConnman &	connman
	)

static

Handle a cfilters request.

May disconnect from the peer in the case of a bad request.

Parameters

[in]	peer	The peer that we received the request from
[in]	vRecv	The raw message received
[in]	chain_params	Chain parameters
[in]	connman	Pointer to the connection manager

Definition at line 2326 of file net_processing.cpp.

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◆ ProcessGetData()

static void ProcessGetData	(	CNode &	pfrom,
		Peer &	peer,
		const CChainParams &	chainparams,
		CConnman &	connman,
		CTxMemPool &	mempool,
		const std::atomic< bool > &	interruptMsgProc
	)

static

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◆ RelayAddress()

static void RelayAddress	(	const CNode &	originator,
		const CAddress &	addr,
		bool	fReachable,
		const CConnman &	connman
	)

static

Relay (gossip) an address to a few randomly chosen nodes.

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.

Parameters

[in]	originator	The peer that sent us the address. We don't want to relay it back.
[in]	addr	Address to relay.
[in]	fReachable	Whether the address' network is reachable. We relay unreachable addresses less.
[in]	connman	Connection manager to choose nodes to relay to.

Definition at line 1629 of file net_processing.cpp.

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◆ RelayTransaction()

void RelayTransaction	(	const uint256 &	txid,
		const uint256 &	wtxid,
		const CConnman &	connman
	)

Relay transaction to every node.

Definition at line 1601 of file net_processing.cpp.

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◆ UpdateLastBlockAnnounceTime()

void UpdateLastBlockAnnounceTime	(	NodeId	node,
		int64_t	time_in_seconds
	)

Definition at line 922 of file net_processing.cpp.

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◆ while()

while ( it ! = peer.m_getdata_requests.end() && it->IsGenTxMsg() )

Definition at line 1871 of file net_processing.cpp.

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Variable Documentation

◆ AVG_ADDRESS_BROADCAST_INTERVAL

constexpr std::chrono::seconds AVG_ADDRESS_BROADCAST_INTERVAL {30}

static

Average delay between peer address broadcasts.

Definition at line 124 of file net_processing.cpp.

◆ AVG_FEEFILTER_BROADCAST_INTERVAL

constexpr unsigned int AVG_FEEFILTER_BROADCAST_INTERVAL = 10 * 60

static

Verify that INVENTORY_MAX_RECENT_RELAY is enough to cache everything typically relayed before unconditional relay from the mempool kicks in.

This is only a lower bound, and it should be larger to account for higher inv rate to outbound peers, and random variations in the broadcast mechanism. Average delay between feefilter broadcasts in seconds.

Definition at line 141 of file net_processing.cpp.

◆ AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL

constexpr std::chrono::hours AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL {24}

static

Average delay between local address broadcasts.

Definition at line 122 of file net_processing.cpp.

◆ BLOCK_DOWNLOAD_TIMEOUT_BASE

const int64_t BLOCK_DOWNLOAD_TIMEOUT_BASE = 1000000

static

Block download timeout base, expressed in millionths of the block interval (i.e.

10 min)

Definition at line 112 of file net_processing.cpp.

◆ BLOCK_DOWNLOAD_TIMEOUT_PER_PEER

const int64_t BLOCK_DOWNLOAD_TIMEOUT_PER_PEER = 500000

static

Additional block download timeout per parallel downloading peer (i.e.

5 min)

Definition at line 114 of file net_processing.cpp.

◆ BLOCK_DOWNLOAD_WINDOW

const unsigned int BLOCK_DOWNLOAD_WINDOW = 1024

static

Size of the "block download window": how far ahead of our current height do we fetch? Larger windows tolerate larger download speed differences between peer, but increase the potential degree of disordering of blocks on disk (which make reindexing and pruning harder).

We'll probably want to make this a per-peer adaptive value at some point.

Definition at line 110 of file net_processing.cpp.

◆ BLOCK_STALLING_TIMEOUT

const unsigned int BLOCK_STALLING_TIMEOUT = 2

static

Timeout in seconds during which a peer must stall block download progress before being disconnected.

Definition at line 97 of file net_processing.cpp.

◆ CHAIN_SYNC_TIMEOUT

constexpr int64_t CHAIN_SYNC_TIMEOUT = 20 * 60

static

Timeout for (unprotected) outbound peers to sync to our chainwork, in seconds.

Definition at line 55 of file net_processing.cpp.

◆ cs_most_recent_block

RecursiveMutex cs_most_recent_block

static

Definition at line 1431 of file net_processing.cpp.

◆ EXTRA_PEER_CHECK_INTERVAL

constexpr int64_t EXTRA_PEER_CHECK_INTERVAL = 45

static

How frequently to check for extra outbound peers and disconnect, in seconds.

Definition at line 59 of file net_processing.cpp.

◆ g_cs_orphans

RecursiveMutex g_cs_orphans

Guards orphan transactions and extra txs for compact blocks.

Definition at line 160 of file net_processing.cpp.

◆ GETDATA_TX_INTERVAL

constexpr std::chrono::microseconds GETDATA_TX_INTERVAL {std::chrono::seconds{60}}

static

How long to wait (in microseconds) before downloading a transaction from an additional peer.

Definition at line 91 of file net_processing.cpp.

◆ HEADERS_DOWNLOAD_TIMEOUT_BASE

constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_BASE = 15 * 60 * 1000000

static

Headers download timeout expressed in microseconds Timeout = base + per_header * (expected number of headers)

Definition at line 48 of file net_processing.cpp.

◆ HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER

constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1000

static

Definition at line 49 of file net_processing.cpp.

◆ HISTORICAL_BLOCK_AGE

constexpr int HISTORICAL_BLOCK_AGE = 7 * 24 * 60 * 60

static

Age after which a block is considered historical for purposes of rate limiting block relay.

Set to one week, denominated in seconds.

Definition at line 69 of file net_processing.cpp.

◆ instance_of_cnetprocessingcleanup

CNetProcessingCleanup instance_of_cnetprocessingcleanup

static

Definition at line 4860 of file net_processing.cpp.

◆ INVENTORY_BROADCAST_INTERVAL

const unsigned int INVENTORY_BROADCAST_INTERVAL = 5

static

Average delay between trickled inventory transmissions in seconds.

Blocks and peers with noban permission bypass this, outbound peers get half this delay.

Definition at line 127 of file net_processing.cpp.

◆ INVENTORY_BROADCAST_MAX

constexpr unsigned int INVENTORY_BROADCAST_MAX = INVENTORY_BROADCAST_PER_SECOND * INVENTORY_BROADCAST_INTERVAL

static

Maximum number of inventory items to send per transmission.

Definition at line 132 of file net_processing.cpp.

◆ INVENTORY_BROADCAST_PER_SECOND

constexpr unsigned int INVENTORY_BROADCAST_PER_SECOND = 7

static

Maximum rate of inventory items to send per second.

Limits the impact of low-fee transaction floods.

Definition at line 130 of file net_processing.cpp.

◆ INVENTORY_MAX_RECENT_RELAY

constexpr unsigned int INVENTORY_MAX_RECENT_RELAY = 3500

static

The number of most recently announced transactions a peer can request.

Definition at line 134 of file net_processing.cpp.

◆ it

std::deque<CInv>::iterator it = peer.m_getdata_requests.begin()

Definition at line 1859 of file net_processing.cpp.

◆ m_getdata_requests_mutex

void peer m_getdata_requests_mutex

Initial value:

{

AssertLockNotHeld(cs_main)

cs_main

RecursiveMutex cs_main

Mutex to guard access to validation specific variables, such as reading or changing the chainstate...

Definition: validation.cpp:128

AssertLockNotHeld

#define AssertLockNotHeld(cs)

Definition: sync.h:82

Definition at line 1856 of file net_processing.cpp.

◆ MAX_BLOCKS_IN_TRANSIT_PER_PEER

const int MAX_BLOCKS_IN_TRANSIT_PER_PEER = 16

static

Number of blocks that can be requested at any given time from a single peer.

Definition at line 95 of file net_processing.cpp.

◆ MAX_BLOCKS_TO_ANNOUNCE

const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8

static

Maximum number of headers to announce when relaying blocks with headers message.

Definition at line 116 of file net_processing.cpp.

◆ MAX_BLOCKTXN_DEPTH

const int MAX_BLOCKTXN_DEPTH = 10

static

Maximum depth of blocks we're willing to respond to GETBLOCKTXN requests for.

Definition at line 105 of file net_processing.cpp.

◆ MAX_CMPCTBLOCK_DEPTH

const int MAX_CMPCTBLOCK_DEPTH = 5

static

Maximum depth of blocks we're willing to serve as compact blocks to peers when requested.

For older blocks, a regular BLOCK response will be sent.

Definition at line 103 of file net_processing.cpp.

◆ MAX_FEEFILTER_CHANGE_DELAY

constexpr unsigned int MAX_FEEFILTER_CHANGE_DELAY = 5 * 60

static

Maximum feefilter broadcast delay after significant change.

Definition at line 143 of file net_processing.cpp.

◆ MAX_GETCFHEADERS_SIZE

constexpr uint32_t MAX_GETCFHEADERS_SIZE = 2000

static

Maximum number of cf hashes that may be requested with one getcfheaders.

See BIP 157.

Definition at line 147 of file net_processing.cpp.

◆ MAX_GETCFILTERS_SIZE

constexpr uint32_t MAX_GETCFILTERS_SIZE = 1000

static

Maximum number of compact filters that may be requested with one getcfilters.

See BIP 157.

Definition at line 145 of file net_processing.cpp.

◆ MAX_GETDATA_SZ

const unsigned int MAX_GETDATA_SZ = 1000

static

Limit to avoid sending big packets.

Not used in processing incoming GETDATA for compatibility

Definition at line 93 of file net_processing.cpp.

◆ MAX_HEADERS_RESULTS

const unsigned int MAX_HEADERS_RESULTS = 2000

static

Number of headers sent in one getheaders result.

We rely on the assumption that if a peer sends less than this number, we reached its tip. Changing this value is a protocol upgrade.

Definition at line 100 of file net_processing.cpp.

◆ MAX_INV_SZ

const unsigned int MAX_INV_SZ = 50000

static

The maximum number of entries in an 'inv' protocol message.

Definition at line 75 of file net_processing.cpp.

◆ MAX_LOCATOR_SZ

const unsigned int MAX_LOCATOR_SZ = 101

static

The maximum number of entries in a locator.

Definition at line 73 of file net_processing.cpp.

◆ MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT

constexpr int32_t MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT = 4

static

Protect at least this many outbound peers from disconnection due to slow/ behind headers chain.

Definition at line 53 of file net_processing.cpp.

◆ MAX_PCT_ADDR_TO_SEND

constexpr size_t MAX_PCT_ADDR_TO_SEND = 23

static

the maximum percentage of addresses from our addrman to return in response to a getaddr message.

Definition at line 149 of file net_processing.cpp.

◆ MAX_PEER_TX_ANNOUNCEMENTS

constexpr int32_t MAX_PEER_TX_ANNOUNCEMENTS = 5000

static

Maximum number of transactions to consider for requesting, per peer.

It provides a reasonable DoS limit to per-peer memory usage spent on announcements, while covering peers continuously sending INVs at the maximum rate (by our own policy, see INVENTORY_BROADCAST_PER_SECOND) for several minutes, while not receiving the actual transaction (from any peer) in response to requests for them.

Definition at line 83 of file net_processing.cpp.

◆ MAX_PEER_TX_REQUEST_IN_FLIGHT

constexpr int32_t MAX_PEER_TX_REQUEST_IN_FLIGHT = 100

static

Maximum number of in-flight transaction requests from a peer.

It is not a hard limit, but the threshold at which point the OVERLOADED_PEER_TX_DELAY kicks in.

Definition at line 78 of file net_processing.cpp.

◆ MAX_UNCONNECTING_HEADERS

const int MAX_UNCONNECTING_HEADERS = 10

static

Maximum number of unconnecting headers announcements before DoS score.

Definition at line 118 of file net_processing.cpp.

◆ mempool_req

const std::chrono::seconds mempool_req

Initial value:

= pfrom.m_tx_relay != nullptr ? pfrom.m_tx_relay->m_last_mempool_req.load()

: std::chrono::seconds::min()

Definition at line 1865 of file net_processing.cpp.

◆ MINIMUM_CONNECT_TIME

constexpr int64_t MINIMUM_CONNECT_TIME = 30

static

Minimum time an outbound-peer-eviction candidate must be connected for, in order to evict, in seconds.

Definition at line 61 of file net_processing.cpp.

◆ NODE_NETWORK_LIMITED_MIN_BLOCKS

const unsigned int NODE_NETWORK_LIMITED_MIN_BLOCKS = 288

static

Minimum blocks required to signal NODE_NETWORK_LIMITED.

Definition at line 120 of file net_processing.cpp.

◆ NONPREF_PEER_TX_DELAY

constexpr auto NONPREF_PEER_TX_DELAY = std::chrono::seconds{2}

static

How long to delay requesting transactions from non-preferred peers.

Definition at line 87 of file net_processing.cpp.

◆ now

const std::chrono::seconds now = GetTime<std::chrono::seconds>()

Definition at line 1863 of file net_processing.cpp.

◆ ORPHAN_TX_EXPIRE_INTERVAL

constexpr int64_t ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60

static

Minimum time between orphan transactions expire time checks in seconds.

Definition at line 41 of file net_processing.cpp.

◆ ORPHAN_TX_EXPIRE_TIME

constexpr int64_t ORPHAN_TX_EXPIRE_TIME = 20 * 60

static

Expiration time for orphan transactions in seconds.

Definition at line 39 of file net_processing.cpp.

◆ OVERLOADED_PEER_TX_DELAY

constexpr auto OVERLOADED_PEER_TX_DELAY = std::chrono::seconds{2}

static

How long to delay requesting transactions from overloaded peers (see MAX_PEER_TX_REQUEST_IN_FLIGHT).

Definition at line 89 of file net_processing.cpp.

◆ PING_INTERVAL

constexpr std::chrono::minutes PING_INTERVAL {2}

static

Time between pings automatically sent out for latency probing and keepalive.

Definition at line 71 of file net_processing.cpp.

◆ RANDOMIZER_ID_ADDRESS_RELAY

constexpr uint64_t RANDOMIZER_ID_ADDRESS_RELAY = 0x3cac0035b5866b90ULL

static

SHA256("main address relay")[0:8].

Definition at line 63 of file net_processing.cpp.

◆ RELAY_TX_CACHE_TIME

constexpr std::chrono::seconds RELAY_TX_CACHE_TIME = std::chrono::minutes{15}

static

How long to cache transactions in mapRelay for normal relay.

Definition at line 43 of file net_processing.cpp.

◆ STALE_CHECK_INTERVAL

constexpr int64_t STALE_CHECK_INTERVAL = 10 * 60

static

How frequently to check for stale tips, in seconds.

Definition at line 57 of file net_processing.cpp.

◆ STALE_RELAY_AGE_LIMIT

constexpr int STALE_RELAY_AGE_LIMIT = 30 * 24 * 60 * 60

static

Age after which a stale block will no longer be served if requested as protection against fingerprinting.

Set to one month, denominated in seconds.

Definition at line 66 of file net_processing.cpp.

◆ TXID_RELAY_DELAY

constexpr auto TXID_RELAY_DELAY = std::chrono::seconds{2}

static

How long to delay requesting transactions via txids, if we have wtxid-relaying peers.

Definition at line 85 of file net_processing.cpp.

◆ UNCONDITIONAL_RELAY_DELAY

constexpr std::chrono::seconds UNCONDITIONAL_RELAY_DELAY = std::chrono::minutes{2}

static

How long a transaction has to be in the mempool before it can unconditionally be relayed (even when not in mapRelay).

Definition at line 45 of file net_processing.cpp.

◆ vNotFound

std::vector<CInv> vNotFound

Definition at line 1860 of file net_processing.cpp.

Classes

Functions

Variables

Function Documentation

◆ AddOrphanTx()

◆ AddToCompactExtraTransactions()

◆ AlreadyHaveBlock()

◆ AlreadyHaveTx()

◆ BlockRequestAllowed()

◆ erase()

◆ EraseOrphansFor()

◆ EraseOrphanTx()

◆ FindTxForGetData()

◆ GetFetchFlags()

◆ GUARDED_BY() [1/2]

◆ GUARDED_BY() [2/2]

◆ if() [1/2]

◆ if() [2/2]

◆ LimitOrphanTxSize()

◆ msgMaker()

◆ PrepareBlockFilterRequest()

◆ ProcessGetBlockData()

◆ ProcessGetCFCheckPt()

◆ ProcessGetCFHeaders()

◆ ProcessGetCFilters()

◆ ProcessGetData()

◆ RelayAddress()

◆ RelayTransaction()

◆ UpdateLastBlockAnnounceTime()

◆ while()

Variable Documentation

◆ AVG_ADDRESS_BROADCAST_INTERVAL

◆ AVG_FEEFILTER_BROADCAST_INTERVAL

◆ AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL

◆ BLOCK_DOWNLOAD_TIMEOUT_BASE

◆ BLOCK_DOWNLOAD_TIMEOUT_PER_PEER

◆ BLOCK_DOWNLOAD_WINDOW

◆ BLOCK_STALLING_TIMEOUT

◆ CHAIN_SYNC_TIMEOUT

◆ cs_most_recent_block

◆ EXTRA_PEER_CHECK_INTERVAL

◆ g_cs_orphans

◆ GETDATA_TX_INTERVAL

◆ HEADERS_DOWNLOAD_TIMEOUT_BASE

◆ HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER

◆ HISTORICAL_BLOCK_AGE

◆ instance_of_cnetprocessingcleanup

◆ INVENTORY_BROADCAST_INTERVAL

◆ INVENTORY_BROADCAST_MAX

◆ INVENTORY_BROADCAST_PER_SECOND

◆ INVENTORY_MAX_RECENT_RELAY

◆ it

◆ m_getdata_requests_mutex

◆ MAX_BLOCKS_IN_TRANSIT_PER_PEER

◆ MAX_BLOCKS_TO_ANNOUNCE

◆ MAX_BLOCKTXN_DEPTH

◆ MAX_CMPCTBLOCK_DEPTH

◆ MAX_FEEFILTER_CHANGE_DELAY

◆ MAX_GETCFHEADERS_SIZE

◆ MAX_GETCFILTERS_SIZE

◆ MAX_GETDATA_SZ

◆ MAX_HEADERS_RESULTS

◆ MAX_INV_SZ

◆ MAX_LOCATOR_SZ

◆ MAX_OUTBOUND_PEERS_TO_PROTECT_FROM_DISCONNECT

◆ MAX_PCT_ADDR_TO_SEND

◆ MAX_PEER_TX_ANNOUNCEMENTS

◆ MAX_PEER_TX_REQUEST_IN_FLIGHT

◆ MAX_UNCONNECTING_HEADERS

◆ mempool_req

◆ MINIMUM_CONNECT_TIME

◆ NODE_NETWORK_LIMITED_MIN_BLOCKS

◆ NONPREF_PEER_TX_DELAY

◆ now

◆ ORPHAN_TX_EXPIRE_INTERVAL

◆ ORPHAN_TX_EXPIRE_TIME

◆ OVERLOADED_PEER_TX_DELAY

◆ PING_INTERVAL

◆ RANDOMIZER_ID_ADDRESS_RELAY

◆ RELAY_TX_CACHE_TIME