diff options
Diffstat (limited to 'src/net_processing.cpp')
| -rw-r--r-- | src/net_processing.cpp | 413 |
1 files changed, 294 insertions, 119 deletions
diff --git a/src/net_processing.cpp b/src/net_processing.cpp index ab430cbe1..6d85b4683 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -8,9 +8,11 @@ #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 <validation.h> #include <merkleblock.h> #include <netmessagemaker.h> @@ -64,6 +66,12 @@ static constexpr int STALE_RELAY_AGE_LIMIT = 30 * 24 * 60 * 60; /// Age after which a block is considered historical for purposes of rate /// limiting block relay. Set to one week, denominated in seconds. static constexpr int HISTORICAL_BLOCK_AGE = 7 * 24 * 60 * 60; +/** Time between pings automatically sent out for latency probing and keepalive (in seconds). */ +static const int PING_INTERVAL = 2 * 60; +/** The maximum number of entries in a locator */ +static const unsigned int MAX_LOCATOR_SZ = 101; +/** The maximum number of entries in an 'inv' protocol message */ +static const unsigned int MAX_INV_SZ = 50000; /** Maximum number of in-flight transactions from a peer */ static constexpr int32_t MAX_PEER_TX_IN_FLIGHT = 100; /** Maximum number of announced transactions from a peer */ @@ -80,7 +88,49 @@ static_assert(INBOUND_PEER_TX_DELAY >= MAX_GETDATA_RANDOM_DELAY, "To preserve security, MAX_GETDATA_RANDOM_DELAY should not exceed INBOUND_PEER_DELAY"); /** Limit to avoid sending big packets. Not used in processing incoming GETDATA for compatibility */ static const unsigned int MAX_GETDATA_SZ = 1000; - +/** Number of blocks that can be requested at any given time from a single peer. */ +static const int MAX_BLOCKS_IN_TRANSIT_PER_PEER = 16; +/** Timeout in seconds during which a peer must stall block download progress before being disconnected. */ +static const unsigned int BLOCK_STALLING_TIMEOUT = 2; +/** 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. */ +static const unsigned int MAX_HEADERS_RESULTS = 2000; +/** 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. */ +static const int MAX_CMPCTBLOCK_DEPTH = 5; +/** Maximum depth of blocks we're willing to respond to GETBLOCKTXN requests for. */ +static const int MAX_BLOCKTXN_DEPTH = 10; +/** 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. */ +static const unsigned int BLOCK_DOWNLOAD_WINDOW = 1024; +/** Block download timeout base, expressed in millionths of the block interval (i.e. 10 min) */ +static const int64_t BLOCK_DOWNLOAD_TIMEOUT_BASE = 1000000; +/** Additional block download timeout per parallel downloading peer (i.e. 5 min) */ +static const int64_t BLOCK_DOWNLOAD_TIMEOUT_PER_PEER = 500000; +/** Maximum number of headers to announce when relaying blocks with headers message.*/ +static const unsigned int MAX_BLOCKS_TO_ANNOUNCE = 8; +/** Maximum number of unconnecting headers announcements before DoS score */ +static const int MAX_UNCONNECTING_HEADERS = 10; +/** Minimum blocks required to signal NODE_NETWORK_LIMITED */ +static const unsigned int NODE_NETWORK_LIMITED_MIN_BLOCKS = 288; +/** Average delay between local address broadcasts */ +static constexpr std::chrono::hours AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL{24}; +/** Average delay between peer address broadcasts */ +static constexpr std::chrono::seconds AVG_ADDRESS_BROADCAST_INTERVAL{30}; +/** Average delay between trickled inventory transmissions in seconds. + * Blocks and whitelisted receivers bypass this, outbound peers get half this delay. */ +static const unsigned int INVENTORY_BROADCAST_INTERVAL = 5; +/** Maximum number of inventory items to send per transmission. + * Limits the impact of low-fee transaction floods. */ +static constexpr unsigned int INVENTORY_BROADCAST_MAX = 7 * INVENTORY_BROADCAST_INTERVAL; +/** Average delay between feefilter broadcasts in seconds. */ +static constexpr unsigned int AVG_FEEFILTER_BROADCAST_INTERVAL = 10 * 60; +/** Maximum feefilter broadcast delay after significant change. */ +static constexpr unsigned int MAX_FEEFILTER_CHANGE_DELAY = 5 * 60; +/** Interval between compact filter checkpoints. See BIP 157. */ +static constexpr int CFCHECKPT_INTERVAL = 1000; struct COrphanTx { // When modifying, adapt the copy of this definition in tests/DoS_tests. @@ -97,21 +147,6 @@ void EraseOrphansFor(NodeId peer); /** Increase a node's misbehavior score. */ void Misbehaving(NodeId nodeid, int howmuch, const std::string& message="") EXCLUSIVE_LOCKS_REQUIRED(cs_main); -/** Average delay between local address broadcasts in seconds. */ -static constexpr unsigned int AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL = 24 * 60 * 60; -/** Average delay between peer address broadcasts in seconds. */ -static const unsigned int AVG_ADDRESS_BROADCAST_INTERVAL = 30; -/** Average delay between trickled inventory transmissions in seconds. - * Blocks and whitelisted receivers bypass this, outbound peers get half this delay. */ -static const unsigned int INVENTORY_BROADCAST_INTERVAL = 5; -/** Maximum number of inventory items to send per transmission. - * Limits the impact of low-fee transaction floods. */ -static constexpr unsigned int INVENTORY_BROADCAST_MAX = 7 * INVENTORY_BROADCAST_INTERVAL; -/** Average delay between feefilter broadcasts in seconds. */ -static constexpr unsigned int AVG_FEEFILTER_BROADCAST_INTERVAL = 10 * 60; -/** Maximum feefilter broadcast delay after significant change. */ -static constexpr unsigned int MAX_FEEFILTER_CHANGE_DELAY = 5 * 60; - // Internal stuff namespace { /** Number of nodes with fSyncStarted. */ @@ -779,6 +814,19 @@ void PeerLogicValidation::InitializeNode(CNode *pnode) { PushNodeVersion(pnode, connman, GetTime()); } +void PeerLogicValidation::ReattemptInitialBroadcast(CScheduler& scheduler) const +{ + std::set<uint256> unbroadcast_txids = m_mempool.GetUnbroadcastTxs(); + + for (const uint256& txid : unbroadcast_txids) { + RelayTransaction(txid, *connman); + } + + // schedule next run for 10-15 minutes in the future + const std::chrono::milliseconds delta = std::chrono::minutes{10} + GetRandMillis(std::chrono::minutes{5}); + scheduler.scheduleFromNow([&] { ReattemptInitialBroadcast(scheduler); }, delta); +} + void PeerLogicValidation::FinalizeNode(NodeId nodeid, bool& fUpdateConnectionTime) { fUpdateConnectionTime = false; LOCK(cs_main); @@ -1128,6 +1176,10 @@ PeerLogicValidation::PeerLogicValidation(CConnman* connmanIn, BanMan* banman, CS // timer. static_assert(EXTRA_PEER_CHECK_INTERVAL < STALE_CHECK_INTERVAL, "peer eviction timer should be less than stale tip check timer"); scheduler.scheduleEvery([this, consensusParams] { this->CheckForStaleTipAndEvictPeers(consensusParams); }, std::chrono::seconds{EXTRA_PEER_CHECK_INTERVAL}); + + // schedule next run for 10-15 minutes in the future + const std::chrono::milliseconds delta = std::chrono::minutes{10} + GetRandMillis(std::chrono::minutes{5}); + scheduler.scheduleFromNow([&] { ReattemptInitialBroadcast(scheduler); }, delta); } /** @@ -1365,7 +1417,7 @@ void RelayTransaction(const uint256& txid, const CConnman& connman) }); } -static void RelayAddress(const CAddress& addr, bool fReachable, CConnman* connman) +static void RelayAddress(const CAddress& addr, bool fReachable, const CConnman& connman) { unsigned int nRelayNodes = fReachable ? 2 : 1; // limited relaying of addresses outside our network(s) @@ -1373,7 +1425,7 @@ static void RelayAddress(const CAddress& addr, bool fReachable, CConnman* connma // 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 uint64_t hashAddr = addr.GetHash(); - const CSipHasher hasher = connman->GetDeterministicRandomizer(RANDOMIZER_ID_ADDRESS_RELAY).Write(hashAddr << 32).Write((GetTime() + hashAddr) / (24*60*60)); + const CSipHasher hasher = connman.GetDeterministicRandomizer(RANDOMIZER_ID_ADDRESS_RELAY).Write(hashAddr << 32).Write((GetTime() + hashAddr) / (24 * 60 * 60)); FastRandomContext insecure_rand; std::array<std::pair<uint64_t, CNode*>,2> best{{{0, nullptr}, {0, nullptr}}}; @@ -1398,7 +1450,7 @@ static void RelayAddress(const CAddress& addr, bool fReachable, CConnman* connma } }; - connman->ForEachNodeThen(std::move(sortfunc), std::move(pushfunc)); + connman.ForEachNodeThen(std::move(sortfunc), std::move(pushfunc)); } void static ProcessGetBlockData(CNode* pfrom, const CChainParams& chainparams, const CInv& inv, CConnman* connman) @@ -1556,7 +1608,38 @@ void static ProcessGetBlockData(CNode* pfrom, const CChainParams& chainparams, c } } -void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnman* connman, const CTxMemPool& mempool, const std::atomic<bool>& interruptMsgProc) 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). +CTransactionRef static FindTxForGetData(CNode* peer, const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds longlived_mempool_time) LOCKS_EXCLUDED(cs_main) +{ + // Check if the requested transaction is so recent that we're just + // about to announce it to the peer; if so, they certainly shouldn't + // know we already have it. + { + LOCK(peer->m_tx_relay->cs_tx_inventory); + if (peer->m_tx_relay->setInventoryTxToSend.count(txid)) return {}; + } + + { + LOCK(cs_main); + // Look up transaction in relay pool + auto mi = mapRelay.find(txid); + if (mi != mapRelay.end()) return mi->second; + } + + auto txinfo = mempool.info(txid); + if (txinfo.tx) { + // To protect privacy, do not answer getdata using the mempool when + // that TX couldn't have been INVed in reply to a MEMPOOL request, + // or when it's too recent to have expired from mapRelay. + if ((mempool_req.count() && txinfo.m_time <= mempool_req) || txinfo.m_time <= longlived_mempool_time) { + return txinfo.tx; + } + } + + return {}; +} + +void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnman* connman, CTxMemPool& mempool, const std::atomic<bool>& interruptMsgProc) LOCKS_EXCLUDED(cs_main) { AssertLockNotHeld(cs_main); @@ -1564,66 +1647,49 @@ void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnm std::vector<CInv> vNotFound; const CNetMsgMaker msgMaker(pfrom->GetSendVersion()); - // Note that if we receive a getdata for a MSG_TX or MSG_WITNESS_TX from a - // block-relay-only outbound peer, we will stop processing further getdata - // messages from this peer (likely resulting in our peer eventually - // disconnecting us). - if (pfrom->m_tx_relay != nullptr) { - // mempool entries added before this time have likely expired from mapRelay - const std::chrono::seconds longlived_mempool_time = GetTime<std::chrono::seconds>() - RELAY_TX_CACHE_TIME; - const std::chrono::seconds mempool_req = pfrom->m_tx_relay->m_last_mempool_req.load(); + // mempool entries added before this time have likely expired from mapRelay + const std::chrono::seconds longlived_mempool_time = GetTime<std::chrono::seconds>() - RELAY_TX_CACHE_TIME; + // Get last mempool request time + const std::chrono::seconds mempool_req = pfrom->m_tx_relay != nullptr ? pfrom->m_tx_relay->m_last_mempool_req.load() + : std::chrono::seconds::min(); - LOCK(cs_main); + // 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 != pfrom->vRecvGetData.end() && (it->type == MSG_TX || it->type == MSG_WITNESS_TX)) { + 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; - while (it != pfrom->vRecvGetData.end() && (it->type == MSG_TX || it->type == MSG_WITNESS_TX)) { - if (interruptMsgProc) - return; - // Don't bother if send buffer is too full to respond anyway - if (pfrom->fPauseSend) - break; + const CInv &inv = *it++; - const CInv &inv = *it; - it++; + if (pfrom->m_tx_relay == nullptr) { + // Ignore GETDATA requests for transactions from blocks-only peers. + continue; + } - // Send stream from relay memory - bool push = false; - auto mi = mapRelay.find(inv.hash); + CTransactionRef tx = FindTxForGetData(pfrom, inv.hash, mempool_req, longlived_mempool_time); + if (tx) { int nSendFlags = (inv.type == MSG_TX ? SERIALIZE_TRANSACTION_NO_WITNESS : 0); - if (mi != mapRelay.end()) { - connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *mi->second)); - push = true; - } else { - auto txinfo = mempool.info(inv.hash); - // To protect privacy, do not answer getdata using the mempool when - // that TX couldn't have been INVed in reply to a MEMPOOL request, - // or when it's too recent to have expired from mapRelay. - if (txinfo.tx && ( - (mempool_req.count() && txinfo.m_time <= mempool_req) - || (txinfo.m_time <= longlived_mempool_time))) - { - connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *txinfo.tx)); - push = true; - } - } - if (!push) { - vNotFound.push_back(inv); - } + connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *tx)); + mempool.RemoveUnbroadcastTx(inv.hash); + } else { + vNotFound.push_back(inv); } - } // release cs_main + } + // Only process one BLOCK item per call, since they're uncommon and can be + // expensive to process. if (it != pfrom->vRecvGetData.end() && !pfrom->fPauseSend) { - const CInv &inv = *it; + const CInv &inv = *it++; if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK || inv.type == MSG_CMPCT_BLOCK || inv.type == MSG_WITNESS_BLOCK) { - it++; ProcessGetBlockData(pfrom, chainparams, inv, connman); } + // else: If the first item on the queue is an unknown type, we erase it + // and continue processing the queue on the next call. } - // Unknown types in the GetData stay in vRecvGetData and block any future - // message from this peer, see vRecvGetData check in ProcessMessages(). - // Depending on future p2p changes, we might either drop unknown getdata on - // the floor or disconnect the peer. - pfrom->vRecvGetData.erase(pfrom->vRecvGetData.begin(), it); if (!vNotFound.empty()) { @@ -1911,9 +1977,110 @@ void static ProcessOrphanTx(CConnman* connman, CTxMemPool& mempool, std::set<uin } } -bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CTxMemPool& mempool, CConnman* connman, BanMan* banman, const std::atomic<bool>& interruptMsgProc) +/** + * Validation logic for compact filters request handling. + * + * May disconnect from the peer in the case of a bad request. + * + * @param[in] pfrom The peer that we received the request from + * @param[in] chain_params Chain parameters + * @param[in] filter_type The filter type the request is for. Must be basic filters. + * @param[in] stop_hash The stop_hash for the request + * @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. + */ +static bool PrepareBlockFilterRequest(CNode* pfrom, const CChainParams& chain_params, + BlockFilterType filter_type, + const uint256& stop_hash, + const CBlockIndex*& stop_index, + const BlockFilterIndex*& filter_index) +{ + const bool supported_filter_type = + (filter_type == BlockFilterType::BASIC && + gArgs.GetBoolArg("-peerblockfilters", DEFAULT_PEERBLOCKFILTERS)); + if (!supported_filter_type) { + LogPrint(BCLog::NET, "peer %d requested unsupported block filter type: %d\n", + pfrom->GetId(), static_cast<uint8_t>(filter_type)); + pfrom->fDisconnect = true; + return false; + } + + { + LOCK(cs_main); + stop_index = LookupBlockIndex(stop_hash); + + // Check that the stop block exists and the peer would be allowed to fetch it. + if (!stop_index || !BlockRequestAllowed(stop_index, chain_params.GetConsensus())) { + LogPrint(BCLog::NET, "peer %d requested invalid block hash: %s\n", + pfrom->GetId(), stop_hash.ToString()); + pfrom->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; +} + +/** + * Handle a getcfcheckpt request. + * + * May disconnect from the peer in the case of a bad request. + * + * @param[in] pfrom The peer that we received the request from + * @param[in] vRecv The raw message received + * @param[in] chain_params Chain parameters + * @param[in] connman Pointer to the connection manager + */ +static void ProcessGetCFCheckPt(CNode* pfrom, CDataStream& vRecv, const CChainParams& chain_params, + CConnman* connman) +{ + 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; + const BlockFilterIndex* filter_index; + if (!PrepareBlockFilterRequest(pfrom, chain_params, filter_type, stop_hash, + 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(pfrom->GetSendVersion()) + .Make(NetMsgType::CFCHECKPT, + filter_type_ser, + stop_index->GetBlockHash(), + headers); + connman->PushMessage(pfrom, std::move(msg)); +} + +bool ProcessMessage(CNode* pfrom, const std::string& msg_type, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CTxMemPool& mempool, CConnman* connman, BanMan* banman, const std::atomic<bool>& interruptMsgProc) { - LogPrint(BCLog::NET, "received: %s (%u bytes) peer=%d\n", SanitizeString(strCommand), vRecv.size(), pfrom->GetId()); + LogPrint(BCLog::NET, "received: %s (%u bytes) peer=%d\n", SanitizeString(msg_type), vRecv.size(), pfrom->GetId()); if (gArgs.IsArgSet("-dropmessagestest") && GetRand(gArgs.GetArg("-dropmessagestest", 0)) == 0) { LogPrintf("dropmessagestest DROPPING RECV MESSAGE\n"); @@ -1922,8 +2089,8 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR if (!(pfrom->GetLocalServices() & NODE_BLOOM) && - (strCommand == NetMsgType::FILTERLOAD || - strCommand == NetMsgType::FILTERADD)) + (msg_type == NetMsgType::FILTERLOAD || + msg_type == NetMsgType::FILTERADD)) { if (pfrom->nVersion >= NO_BLOOM_VERSION) { LOCK(cs_main); @@ -1935,7 +2102,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR } } - if (strCommand == NetMsgType::VERSION) { + if (msg_type == NetMsgType::VERSION) { // Each connection can only send one version message if (pfrom->nVersion != 0) { @@ -2107,7 +2274,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR // At this point, the outgoing message serialization version can't change. const CNetMsgMaker msgMaker(pfrom->GetSendVersion()); - if (strCommand == NetMsgType::VERACK) + if (msg_type == NetMsgType::VERACK) { pfrom->SetRecvVersion(std::min(pfrom->nVersion.load(), PROTOCOL_VERSION)); @@ -2152,7 +2319,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return false; } - if (strCommand == NetMsgType::ADDR) { + if (msg_type == NetMsgType::ADDR) { std::vector<CAddress> vAddr; vRecv >> vAddr; @@ -2192,7 +2359,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable()) { // Relay to a limited number of other nodes - RelayAddress(addr, fReachable, connman); + RelayAddress(addr, fReachable, *connman); } // Do not store addresses outside our network if (fReachable) @@ -2206,13 +2373,13 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::SENDHEADERS) { + if (msg_type == NetMsgType::SENDHEADERS) { LOCK(cs_main); State(pfrom->GetId())->fPreferHeaders = true; return true; } - if (strCommand == NetMsgType::SENDCMPCT) { + if (msg_type == NetMsgType::SENDCMPCT) { bool fAnnounceUsingCMPCTBLOCK = false; uint64_t nCMPCTBLOCKVersion = 0; vRecv >> fAnnounceUsingCMPCTBLOCK >> nCMPCTBLOCKVersion; @@ -2235,7 +2402,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::INV) { + if (msg_type == NetMsgType::INV) { std::vector<CInv> vInv; vRecv >> vInv; if (vInv.size() > MAX_INV_SZ) @@ -2257,6 +2424,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR uint32_t nFetchFlags = GetFetchFlags(pfrom); const auto current_time = GetTime<std::chrono::microseconds>(); + uint256* best_block{nullptr}; for (CInv &inv : vInv) { @@ -2273,17 +2441,14 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR if (inv.type == MSG_BLOCK) { UpdateBlockAvailability(pfrom->GetId(), inv.hash); if (!fAlreadyHave && !fImporting && !fReindex && !mapBlocksInFlight.count(inv.hash)) { - // We used to request the full block here, but since headers-announcements are now the - // primary method of announcement on the network, and since, in the case that a node - // fell back to inv we probably have a reorg which we should get the headers for first, - // we now only provide a getheaders response here. When we receive the headers, we will - // then ask for the blocks we need. - connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::GETHEADERS, ::ChainActive().GetLocator(pindexBestHeader), inv.hash)); - LogPrint(BCLog::NET, "getheaders (%d) %s to peer=%d\n", pindexBestHeader->nHeight, inv.hash.ToString(), pfrom->GetId()); + // Headers-first is the primary method of announcement on + // the network. If a node fell back to sending blocks by inv, + // it's probably for a re-org. 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 - { + } else { pfrom->AddInventoryKnown(inv); if (fBlocksOnly) { LogPrint(BCLog::NET, "transaction (%s) inv sent in violation of protocol, disconnecting peer=%d\n", inv.hash.ToString(), pfrom->GetId()); @@ -2294,10 +2459,16 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR } } } + + if (best_block != nullptr) { + connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::GETHEADERS, ::ChainActive().GetLocator(pindexBestHeader), *best_block)); + LogPrint(BCLog::NET, "getheaders (%d) %s to peer=%d\n", pindexBestHeader->nHeight, best_block->ToString(), pfrom->GetId()); + } + return true; } - if (strCommand == NetMsgType::GETDATA) { + if (msg_type == NetMsgType::GETDATA) { std::vector<CInv> vInv; vRecv >> vInv; if (vInv.size() > MAX_INV_SZ) @@ -2318,7 +2489,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::GETBLOCKS) { + if (msg_type == NetMsgType::GETBLOCKS) { CBlockLocator locator; uint256 hashStop; vRecv >> locator >> hashStop; @@ -2386,7 +2557,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::GETBLOCKTXN) { + if (msg_type == NetMsgType::GETBLOCKTXN) { BlockTransactionsRequest req; vRecv >> req; @@ -2435,7 +2606,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::GETHEADERS) { + if (msg_type == NetMsgType::GETHEADERS) { CBlockLocator locator; uint256 hashStop; vRecv >> locator >> hashStop; @@ -2502,7 +2673,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::TX) { + if (msg_type == NetMsgType::TX) { // Stop processing the transaction early if // We are in blocks only mode and peer is either not whitelisted or whitelistrelay is off // or if this peer is supposed to be a block-relay-only peer @@ -2644,7 +2815,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::CMPCTBLOCK) + if (msg_type == NetMsgType::CMPCTBLOCK) { // Ignore cmpctblock received while importing if (fImporting || fReindex) { @@ -2865,7 +3036,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::BLOCKTXN) + if (msg_type == NetMsgType::BLOCKTXN) { // Ignore blocktxn received while importing if (fImporting || fReindex) { @@ -2947,7 +3118,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::HEADERS) + if (msg_type == NetMsgType::HEADERS) { // Ignore headers received while importing if (fImporting || fReindex) { @@ -2973,7 +3144,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return ProcessHeadersMessage(pfrom, connman, mempool, headers, chainparams, /*via_compact_block=*/false); } - if (strCommand == NetMsgType::BLOCK) + if (msg_type == NetMsgType::BLOCK) { // Ignore block received while importing if (fImporting || fReindex) { @@ -3009,7 +3180,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::GETADDR) { + 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. @@ -3043,7 +3214,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::MEMPOOL) { + if (msg_type == NetMsgType::MEMPOOL) { if (!(pfrom->GetLocalServices() & NODE_BLOOM) && !pfrom->HasPermission(PF_MEMPOOL)) { if (!pfrom->HasPermission(PF_NOBAN)) @@ -3071,7 +3242,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::PING) { + if (msg_type == NetMsgType::PING) { if (pfrom->nVersion > BIP0031_VERSION) { uint64_t nonce = 0; @@ -3092,7 +3263,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::PONG) { + if (msg_type == NetMsgType::PONG) { int64_t pingUsecEnd = nTimeReceived; uint64_t nonce = 0; size_t nAvail = vRecv.in_avail(); @@ -3148,7 +3319,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::FILTERLOAD) { + if (msg_type == NetMsgType::FILTERLOAD) { CBloomFilter filter; vRecv >> filter; @@ -3162,13 +3333,12 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR { LOCK(pfrom->m_tx_relay->cs_filter); pfrom->m_tx_relay->pfilter.reset(new CBloomFilter(filter)); - pfrom->m_tx_relay->pfilter->UpdateEmptyFull(); pfrom->m_tx_relay->fRelayTxes = true; } return true; } - if (strCommand == NetMsgType::FILTERADD) { + if (msg_type == NetMsgType::FILTERADD) { std::vector<unsigned char> vData; vRecv >> vData; @@ -3192,19 +3362,19 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::FILTERCLEAR) { + if (msg_type == NetMsgType::FILTERCLEAR) { if (pfrom->m_tx_relay == nullptr) { return true; } LOCK(pfrom->m_tx_relay->cs_filter); if (pfrom->GetLocalServices() & NODE_BLOOM) { - pfrom->m_tx_relay->pfilter.reset(new CBloomFilter()); + pfrom->m_tx_relay->pfilter = nullptr; } pfrom->m_tx_relay->fRelayTxes = true; return true; } - if (strCommand == NetMsgType::FEEFILTER) { + if (msg_type == NetMsgType::FEEFILTER) { CAmount newFeeFilter = 0; vRecv >> newFeeFilter; if (MoneyRange(newFeeFilter)) { @@ -3217,7 +3387,12 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR return true; } - if (strCommand == NetMsgType::NOTFOUND) { + if (msg_type == NetMsgType::GETCFCHECKPT) { + ProcessGetCFCheckPt(pfrom, vRecv, chainparams, connman); + return true; + } + + if (msg_type == NetMsgType::NOTFOUND) { // Remove the NOTFOUND transactions from the peer LOCK(cs_main); CNodeState *state = State(pfrom->GetId()); @@ -3243,7 +3418,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR } // Ignore unknown commands for extensibility - LogPrint(BCLog::NET, "Unknown command \"%s\" from peer=%d\n", SanitizeString(strCommand), pfrom->GetId()); + LogPrint(BCLog::NET, "Unknown command \"%s\" from peer=%d\n", SanitizeString(msg_type), pfrom->GetId()); return true; } @@ -3338,7 +3513,7 @@ bool PeerLogicValidation::ProcessMessages(CNode* pfrom, std::atomic<bool>& inter LogPrint(BCLog::NET, "PROCESSMESSAGE: ERRORS IN HEADER %s peer=%d\n", SanitizeString(msg.m_command), pfrom->GetId()); return fMoreWork; } - const std::string& strCommand = msg.m_command; + const std::string& msg_type = msg.m_command; // Message size unsigned int nMessageSize = msg.m_message_size; @@ -3348,7 +3523,7 @@ bool PeerLogicValidation::ProcessMessages(CNode* pfrom, std::atomic<bool>& inter if (!msg.m_valid_checksum) { LogPrint(BCLog::NET, "%s(%s, %u bytes): CHECKSUM ERROR peer=%d\n", __func__, - SanitizeString(strCommand), nMessageSize, pfrom->GetId()); + SanitizeString(msg_type), nMessageSize, pfrom->GetId()); return fMoreWork; } @@ -3356,19 +3531,19 @@ bool PeerLogicValidation::ProcessMessages(CNode* pfrom, std::atomic<bool>& inter bool fRet = false; try { - fRet = ProcessMessage(pfrom, strCommand, vRecv, msg.m_time, chainparams, m_mempool, connman, m_banman, interruptMsgProc); + fRet = ProcessMessage(pfrom, msg_type, vRecv, msg.m_time, chainparams, m_mempool, connman, m_banman, interruptMsgProc); if (interruptMsgProc) return false; if (!pfrom->vRecvGetData.empty()) fMoreWork = true; } catch (const std::exception& e) { - LogPrint(BCLog::NET, "%s(%s, %u bytes): Exception '%s' (%s) caught\n", __func__, SanitizeString(strCommand), nMessageSize, e.what(), typeid(e).name()); + LogPrint(BCLog::NET, "%s(%s, %u bytes): Exception '%s' (%s) caught\n", __func__, SanitizeString(msg_type), nMessageSize, e.what(), typeid(e).name()); } catch (...) { - LogPrint(BCLog::NET, "%s(%s, %u bytes): Unknown exception caught\n", __func__, SanitizeString(strCommand), nMessageSize); + LogPrint(BCLog::NET, "%s(%s, %u bytes): Unknown exception caught\n", __func__, SanitizeString(msg_type), nMessageSize); } if (!fRet) { - LogPrint(BCLog::NET, "%s(%s, %u bytes) FAILED peer=%d\n", __func__, SanitizeString(strCommand), nMessageSize, pfrom->GetId()); + LogPrint(BCLog::NET, "%s(%s, %u bytes) FAILED peer=%d\n", __func__, SanitizeString(msg_type), nMessageSize, pfrom->GetId()); } LOCK(cs_main); @@ -3583,16 +3758,16 @@ bool PeerLogicValidation::SendMessages(CNode* pto) int64_t nNow = GetTimeMicros(); auto current_time = GetTime<std::chrono::microseconds>(); - if (pto->IsAddrRelayPeer() && !::ChainstateActive().IsInitialBlockDownload() && pto->nNextLocalAddrSend < nNow) { + if (pto->IsAddrRelayPeer() && !::ChainstateActive().IsInitialBlockDownload() && pto->m_next_local_addr_send < current_time) { AdvertiseLocal(pto); - pto->nNextLocalAddrSend = PoissonNextSend(nNow, AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL); + pto->m_next_local_addr_send = PoissonNextSend(current_time, AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL); } // // Message: addr // - if (pto->IsAddrRelayPeer() && pto->nNextAddrSend < nNow) { - pto->nNextAddrSend = PoissonNextSend(nNow, AVG_ADDRESS_BROADCAST_INTERVAL); + if (pto->IsAddrRelayPeer() && pto->m_next_addr_send < current_time) { + pto->m_next_addr_send = PoissonNextSend(current_time, AVG_ADDRESS_BROADCAST_INTERVAL); std::vector<CAddress> vAddr; vAddr.reserve(pto->vAddrToSend.size()); assert(pto->m_addr_known); |