Bitcoin Core  0.20.99
P2P Digital Currency
Classes | Functions | Variables
net_processing.cpp File Reference
#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 <util/check.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <validation.h>
#include <memory>
#include <typeinfo>
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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)
 
bool GetNodeStateStats (NodeId nodeid, CNodeStateStats &stats)
 Get statistics from node state. More...
 
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 CAddress &addr, bool fReachable, const CConnman &connman)
 
static void ProcessGetBlockData (CNode &pfrom, 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< CInvvNotFound
 
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 925 of file net_processing.cpp.

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◆ AddToCompactExtraTransactions()

static void AddToCompactExtraTransactions ( const CTransactionRef tx)
static

Definition at line 914 of file net_processing.cpp.

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◆ AlreadyHaveBlock()

static bool AlreadyHaveBlock ( const uint256 block_hash)
static

Definition at line 1424 of file net_processing.cpp.

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◆ AlreadyHaveTx()

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

Definition at line 1393 of file net_processing.cpp.

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◆ BlockRequestAllowed()

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

Definition at line 1150 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 992 of file net_processing.cpp.

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◆ EraseOrphanTx()

static int EraseOrphanTx ( uint256  hash)
static

Definition at line 961 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 1638 of file net_processing.cpp.

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◆ GetFetchFlags()

static uint32_t GetFetchFlags ( const CNode pfrom)
static

Definition at line 1759 of file net_processing.cpp.

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◆ GetNodeStateStats()

bool GetNodeStateStats ( NodeId  nodeid,
CNodeStateStats stats 
)

Get statistics from node state.

Definition at line 888 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 1729 of file net_processing.cpp.

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◆ if() [2/2]

if ( !vNotFound.  empty())

Definition at line 1740 of file net_processing.cpp.

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◆ LimitOrphanTxSize()

unsigned int LimitOrphanTxSize ( unsigned int  nMaxOrphans)

Definition at line 1009 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]peerThe peer that we received the request from
[in]chain_paramsChain parameters
[in]filter_typeThe filter type the request is for. Must be basic filters.
[in]start_heightThe start height for the request
[in]stop_hashThe stop_hash for the request
[in]max_height_diffThe maximum number of items permitted to request, as specified in BIP 157
[out]stop_indexThe CBlockIndex for the stop_hash block, if the request can be serviced.
[out]filter_indexThe filter index, if the request can be serviced.
Returns
True if the request can be serviced.

Definition at line 2069 of file net_processing.cpp.

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◆ ProcessGetBlockData()

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

Definition at line 1483 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]peerThe peer that we received the request from
[in]vRecvThe raw message received
[in]chain_paramsChain parameters
[in]connmanPointer to the connection manager

Definition at line 2229 of file net_processing.cpp.

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◆ 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]peerThe peer that we received the request from
[in]vRecvThe raw message received
[in]chain_paramsChain parameters
[in]connmanPointer to the connection manager

Definition at line 2174 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]peerThe peer that we received the request from
[in]vRecvThe raw message received
[in]chain_paramsChain parameters
[in]connmanPointer to the connection manager

Definition at line 2132 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 CAddress addr,
bool  fReachable,
const CConnman connman 
)
static

Definition at line 1444 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 1429 of file net_processing.cpp.

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◆ UpdateLastBlockAnnounceTime()

void UpdateLastBlockAnnounceTime ( NodeId  node,
int64_t  time_in_seconds 
)

Definition at line 793 of file net_processing.cpp.

◆ while()

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

Definition at line 1681 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 123 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 140 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 121 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 111 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 113 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 109 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 96 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 54 of file net_processing.cpp.

◆ cs_most_recent_block

RecursiveMutex cs_most_recent_block
static

Definition at line 1265 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 58 of file net_processing.cpp.

◆ g_cs_orphans

RecursiveMutex g_cs_orphans

Guards orphan transactions and extra txs for compact blocks.

Definition at line 159 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 90 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 47 of file net_processing.cpp.

◆ HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER

constexpr int64_t HEADERS_DOWNLOAD_TIMEOUT_PER_HEADER = 1000
static

Definition at line 48 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 68 of file net_processing.cpp.

◆ instance_of_cnetprocessingcleanup

CNetProcessingCleanup instance_of_cnetprocessingcleanup
static

Definition at line 4605 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 126 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 131 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 129 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 133 of file net_processing.cpp.

◆ it

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

Definition at line 1669 of file net_processing.cpp.

◆ m_getdata_requests_mutex

void peer m_getdata_requests_mutex
Initial value:
{
RecursiveMutex cs_main
Mutex to guard access to validation specific variables, such as reading or changing the chainstate...
Definition: validation.cpp:129
#define AssertLockNotHeld(cs)
Definition: sync.h:80

Definition at line 1666 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 94 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 115 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 104 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 102 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 142 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 146 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 144 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 92 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 99 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 74 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 72 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 52 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 148 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 82 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 77 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 117 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 1675 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 60 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 119 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 86 of file net_processing.cpp.

◆ now

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

Definition at line 1673 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 40 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 38 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 88 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 70 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 62 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 42 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 56 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 65 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 84 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 44 of file net_processing.cpp.

◆ vNotFound

std::vector<CInv> vNotFound

Definition at line 1670 of file net_processing.cpp.