diff options
Diffstat (limited to 'src/main.cpp')
-rw-r--r-- | src/main.cpp | 583 |
1 files changed, 328 insertions, 255 deletions
diff --git a/src/main.cpp b/src/main.cpp index 98e1741954..a9c080ffae 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -7,11 +7,13 @@ #include "addrman.h" #include "alert.h" +#include "bloom.h" #include "chainparams.h" #include "checkpoints.h" #include "checkqueue.h" #include "init.h" #include "net.h" +#include "pow.h" #include "txdb.h" #include "txmempool.h" #include "ui_interface.h" @@ -36,8 +38,6 @@ using namespace boost; CCriticalSection cs_main; -CTxMemPool mempool; - map<uint256, CBlockIndex*> mapBlockIndex; CChain chainActive; int64_t nTimeBestReceived = 0; @@ -48,10 +48,10 @@ bool fBenchmark = false; bool fTxIndex = false; unsigned int nCoinCacheSize = 5000; -/** Fees smaller than this (in satoshi) are considered zero fee (for transaction creation) */ -CFeeRate CTransaction::minTxFee = CFeeRate(10000); // Override with -mintxfee /** Fees smaller than this (in satoshi) are considered zero fee (for relaying and mining) */ -CFeeRate CTransaction::minRelayTxFee = CFeeRate(1000); +CFeeRate minRelayTxFee = CFeeRate(1000); + +CTxMemPool mempool(::minRelayTxFee); struct COrphanBlock { uint256 hashBlock; @@ -71,6 +71,7 @@ const string strMessageMagic = "Bitcoin Signed Message:\n"; // Internal stuff namespace { + struct CBlockIndexWorkComparator { bool operator()(CBlockIndex *pa, CBlockIndex *pb) { @@ -119,8 +120,18 @@ namespace { }; map<uint256, pair<NodeId, list<QueuedBlock>::iterator> > mapBlocksInFlight; map<uint256, pair<NodeId, list<uint256>::iterator> > mapBlocksToDownload; + +} // anon namespace + +// Bloom filter to limit respend relays to one +static const unsigned int MAX_DOUBLESPEND_BLOOM = 1000; +static CBloomFilter doubleSpendFilter; +void InitRespendFilter() { + seed_insecure_rand(); + doubleSpendFilter = CBloomFilter(MAX_DOUBLESPEND_BLOOM, 0.01, insecure_rand(), BLOOM_UPDATE_NONE); } + ////////////////////////////////////////////////////////////////////////////// // // dispatching functions @@ -129,9 +140,10 @@ namespace { // These functions dispatch to one or all registered wallets namespace { + struct CMainSignals { - // Notifies listeners of updated transaction data (passing hash, transaction, and optionally the block it is found in. - boost::signals2::signal<void (const uint256 &, const CTransaction &, const CBlock *)> SyncTransaction; + // Notifies listeners of updated transaction data (transaction, and optionally the block it is found in. + boost::signals2::signal<void (const CTransaction &, const CBlock *)> SyncTransaction; // Notifies listeners of an erased transaction (currently disabled, requires transaction replacement). boost::signals2::signal<void (const uint256 &)> EraseTransaction; // Notifies listeners of an updated transaction without new data (for now: a coinbase potentially becoming visible). @@ -143,10 +155,12 @@ struct CMainSignals { // Tells listeners to broadcast their data. boost::signals2::signal<void ()> Broadcast; } g_signals; -} + +} // anon namespace + void RegisterWallet(CWalletInterface* pwalletIn) { - g_signals.SyncTransaction.connect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2, _3)); + g_signals.SyncTransaction.connect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2)); g_signals.EraseTransaction.connect(boost::bind(&CWalletInterface::EraseFromWallet, pwalletIn, _1)); g_signals.UpdatedTransaction.connect(boost::bind(&CWalletInterface::UpdatedTransaction, pwalletIn, _1)); g_signals.SetBestChain.connect(boost::bind(&CWalletInterface::SetBestChain, pwalletIn, _1)); @@ -160,7 +174,7 @@ void UnregisterWallet(CWalletInterface* pwalletIn) { g_signals.SetBestChain.disconnect(boost::bind(&CWalletInterface::SetBestChain, pwalletIn, _1)); g_signals.UpdatedTransaction.disconnect(boost::bind(&CWalletInterface::UpdatedTransaction, pwalletIn, _1)); g_signals.EraseTransaction.disconnect(boost::bind(&CWalletInterface::EraseFromWallet, pwalletIn, _1)); - g_signals.SyncTransaction.disconnect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2, _3)); + g_signals.SyncTransaction.disconnect(boost::bind(&CWalletInterface::SyncTransaction, pwalletIn, _1, _2)); } void UnregisterAllWallets() { @@ -172,8 +186,8 @@ void UnregisterAllWallets() { g_signals.SyncTransaction.disconnect_all_slots(); } -void SyncWithWallets(const uint256 &hash, const CTransaction &tx, const CBlock *pblock) { - g_signals.SyncTransaction(hash, tx, pblock); +void SyncWithWallets(const CTransaction &tx, const CBlock *pblock) { + g_signals.SyncTransaction(tx, pblock); } ////////////////////////////////////////////////////////////////////////////// @@ -202,6 +216,10 @@ struct CNodeState { std::string name; // List of asynchronously-determined block rejections to notify this peer about. std::vector<CBlockReject> rejects; + // The best known block we know this peer has announced. + CBlockIndex *pindexBestKnownBlock; + // The hash of the last unknown block this peer has announced. + uint256 hashLastUnknownBlock; list<QueuedBlock> vBlocksInFlight; int nBlocksInFlight; list<uint256> vBlocksToDownload; @@ -212,6 +230,8 @@ struct CNodeState { CNodeState() { nMisbehavior = 0; fShouldBan = false; + pindexBestKnownBlock = NULL; + hashLastUnknownBlock = uint256(0); nBlocksToDownload = 0; nBlocksInFlight = 0; nLastBlockReceive = 0; @@ -273,7 +293,6 @@ void MarkBlockAsReceived(const uint256 &hash, NodeId nodeFrom = -1) { state->nLastBlockReceive = GetTimeMicros(); mapBlocksInFlight.erase(itInFlight); } - } // Requires cs_main. @@ -309,14 +328,48 @@ void MarkBlockAsInFlight(NodeId nodeid, const uint256 &hash) { mapBlocksInFlight[hash] = std::make_pair(nodeid, it); } +/** Check whether the last unknown block a peer advertized is not yet known. */ +void ProcessBlockAvailability(NodeId nodeid) { + CNodeState *state = State(nodeid); + assert(state != NULL); + + if (state->hashLastUnknownBlock != 0) { + map<uint256, CBlockIndex*>::iterator itOld = mapBlockIndex.find(state->hashLastUnknownBlock); + if (itOld != mapBlockIndex.end() && itOld->second->nChainWork > 0) { + if (state->pindexBestKnownBlock == NULL || itOld->second->nChainWork >= state->pindexBestKnownBlock->nChainWork) + state->pindexBestKnownBlock = itOld->second; + state->hashLastUnknownBlock = uint256(0); + } + } +} + +/** Update tracking information about which blocks a peer is assumed to have. */ +void UpdateBlockAvailability(NodeId nodeid, const uint256 &hash) { + CNodeState *state = State(nodeid); + assert(state != NULL); + + ProcessBlockAvailability(nodeid); + + map<uint256, CBlockIndex*>::iterator it = mapBlockIndex.find(hash); + if (it != mapBlockIndex.end() && it->second->nChainWork > 0) { + // An actually better block was announced. + if (state->pindexBestKnownBlock == NULL || it->second->nChainWork >= state->pindexBestKnownBlock->nChainWork) + state->pindexBestKnownBlock = it->second; + } else { + // An unknown block was announced; just assume that the latest one is the best one. + state->hashLastUnknownBlock = hash; + } } +} // anon namespace + bool GetNodeStateStats(NodeId nodeid, CNodeStateStats &stats) { LOCK(cs_main); CNodeState *state = State(nodeid); if (state == NULL) return false; stats.nMisbehavior = state->nMisbehavior; + stats.nSyncHeight = state->pindexBestKnownBlock ? state->pindexBestKnownBlock->nHeight : -1; return true; } @@ -370,12 +423,13 @@ CBlockLocator CChain::GetLocator(const CBlockIndex *pindex) const { break; // Exponentially larger steps back, plus the genesis block. int nHeight = std::max(pindex->nHeight - nStep, 0); - // In case pindex is not in this chain, iterate pindex->pprev to find blocks. - while (pindex->nHeight > nHeight && !Contains(pindex)) - pindex = pindex->pprev; - // If pindex is in this chain, use direct height-based access. - if (pindex->nHeight > nHeight) + if (Contains(pindex)) { + // Use O(1) CChain index if possible. pindex = (*this)[nHeight]; + } else { + // Otherwise, use O(log n) skiplist. + pindex = pindex->GetAncestor(nHeight); + } if (vHave.size() > 10) nStep *= 2; } @@ -398,6 +452,8 @@ CBlockIndex *CChain::FindFork(const CBlockLocator &locator) const { } CBlockIndex *CChain::FindFork(CBlockIndex *pindex) const { + if (pindex->nHeight > Height()) + pindex = pindex->GetAncestor(Height()); while (pindex && !Contains(pindex)) pindex = pindex->pprev; return pindex; @@ -487,7 +543,7 @@ bool IsStandardTx(const CTransaction& tx, string& reason) // Treat non-final transactions as non-standard to prevent a specific type // of double-spend attack, as well as DoS attacks. (if the transaction // can't be mined, the attacker isn't expending resources broadcasting it) - // Basically we don't want to propagate transactions that can't included in + // Basically we don't want to propagate transactions that can't be included in // the next block. // // However, IsFinalTx() is confusing... Without arguments, it uses @@ -520,7 +576,7 @@ bool IsStandardTx(const CTransaction& tx, string& reason) { // Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed // keys. (remember the 520 byte limit on redeemScript size) That works - // out to a (15*(33+1))+3=513 byte redeemScript, 513+1+15*(73+1)=1624 + // out to a (15*(33+1))+3=513 byte redeemScript, 513+1+15*(73+1)+3=1627 // bytes of scriptSig, which we round off to 1650 bytes for some minor // future-proofing. That's also enough to spend a 20-of-20 // CHECKMULTISIG scriptPubKey, though such a scriptPubKey is not @@ -548,7 +604,7 @@ bool IsStandardTx(const CTransaction& tx, string& reason) } if (whichType == TX_NULL_DATA) nDataOut++; - else if (txout.IsDust(CTransaction::minRelayTxFee)) { + else if (txout.IsDust(::minRelayTxFee)) { reason = "dust"; return false; } @@ -582,15 +638,13 @@ bool IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime) } // -// Check transaction inputs, and make sure any -// pay-to-script-hash transactions are evaluating IsStandard scripts +// Check transaction inputs to mitigate two +// potential denial-of-service attacks: // -// Why bother? To avoid denial-of-service attacks; an attacker -// can submit a standard HASH... OP_EQUAL transaction, -// which will get accepted into blocks. The redemption -// script can be anything; an attacker could use a very -// expensive-to-check-upon-redemption script like: -// DUP CHECKSIG DROP ... repeated 100 times... OP_1 +// 1. scriptSigs with extra data stuffed into them, +// not consumed by scriptPubKey (or P2SH script) +// 2. P2SH scripts with a crazy number of expensive +// CHECKSIG/CHECKMULTISIG operations // bool AreInputsStandard(const CTransaction& tx, CCoinsViewCache& mapInputs) { @@ -614,8 +668,9 @@ bool AreInputsStandard(const CTransaction& tx, CCoinsViewCache& mapInputs) // Transactions with extra stuff in their scriptSigs are // non-standard. Note that this EvalScript() call will // be quick, because if there are any operations - // beside "push data" in the scriptSig the - // IsStandard() call returns false + // beside "push data" in the scriptSig + // IsStandard() will have already returned false + // and this method isn't called. vector<vector<unsigned char> > stack; if (!EvalScript(stack, tx.vin[i].scriptSig, tx, i, false, 0)) return false; @@ -627,16 +682,20 @@ bool AreInputsStandard(const CTransaction& tx, CCoinsViewCache& mapInputs) CScript subscript(stack.back().begin(), stack.back().end()); vector<vector<unsigned char> > vSolutions2; txnouttype whichType2; - if (!Solver(subscript, whichType2, vSolutions2)) - return false; - if (whichType2 == TX_SCRIPTHASH) - return false; - - int tmpExpected; - tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2); - if (tmpExpected < 0) - return false; - nArgsExpected += tmpExpected; + if (Solver(subscript, whichType2, vSolutions2)) + { + int tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2); + if (tmpExpected < 0) + return false; + nArgsExpected += tmpExpected; + } + else + { + // Any other Script with less than 15 sigops OK: + unsigned int sigops = subscript.GetSigOpCount(true); + // ... extra data left on the stack after execution is OK, too: + return (sigops <= MAX_P2SH_SIGOPS); + } } if (stack.size() != (unsigned int)nArgsExpected) @@ -786,12 +845,19 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state) return true; } -int64_t GetMinFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree, enum GetMinFee_mode mode) +int64_t GetMinRelayFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree) { - // Base fee is either minTxFee or minRelayTxFee - CFeeRate baseFeeRate = (mode == GMF_RELAY) ? tx.minRelayTxFee : tx.minTxFee; + { + LOCK(mempool.cs); + uint256 hash = tx.GetHash(); + double dPriorityDelta = 0; + int64_t nFeeDelta = 0; + mempool.ApplyDeltas(hash, dPriorityDelta, nFeeDelta); + if (dPriorityDelta > 0 || nFeeDelta > 0) + return 0; + } - int64_t nMinFee = baseFeeRate.GetFee(nBytes); + int64_t nMinFee = ::minRelayTxFee.GetFee(nBytes); if (fAllowFree) { @@ -799,9 +865,7 @@ int64_t GetMinFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree, // * If we are relaying we allow transactions up to DEFAULT_BLOCK_PRIORITY_SIZE - 1000 // to be considered to fall into this category. We don't want to encourage sending // multiple transactions instead of one big transaction to avoid fees. - // * If we are creating a transaction we allow transactions up to 1,000 bytes - // to be considered safe and assume they can likely make it into this section. - if (nBytes < (mode == GMF_SEND ? 1000 : (DEFAULT_BLOCK_PRIORITY_SIZE - 1000))) + if (nBytes < (DEFAULT_BLOCK_PRIORITY_SIZE - 1000)) nMinFee = 0; } @@ -810,6 +874,60 @@ int64_t GetMinFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree, return nMinFee; } +// Exponentially limit the rate of nSize flow to nLimit. nLimit unit is thousands-per-minute. +bool RateLimitExceeded(double& dCount, int64_t& nLastTime, int64_t nLimit, unsigned int nSize) +{ + static CCriticalSection csLimiter; + int64_t nNow = GetTime(); + + LOCK(csLimiter); + + dCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime)); + nLastTime = nNow; + if (dCount >= nLimit*10*1000) + return true; + dCount += nSize; + return false; +} + +static bool RelayableRespend(const COutPoint& outPoint, const CTransaction& doubleSpend, bool fInBlock, CBloomFilter& filter) +{ + // Relaying double-spend attempts to our peers lets them detect when + // somebody might be trying to cheat them. However, blindly relaying + // every double-spend across the entire network gives attackers + // a denial-of-service attack: just generate a stream of double-spends + // re-spending the same (limited) set of outpoints owned by the attacker. + // So, we use a bloom filter and only relay (at most) the first double + // spend for each outpoint. False-positives ("we have already relayed") + // are OK, because if the peer doesn't hear about the double-spend + // from us they are very likely to hear about it from another peer, since + // each peer uses a different, randomized bloom filter. + + if (fInBlock || filter.contains(outPoint)) return false; + + // Apply an independent rate limit to double-spend relays + static double dRespendCount; + static int64_t nLastRespendTime; + static int64_t nRespendLimit = GetArg("-limitrespendrelay", 100); + unsigned int nSize = ::GetSerializeSize(doubleSpend, SER_NETWORK, PROTOCOL_VERSION); + + if (RateLimitExceeded(dRespendCount, nLastRespendTime, nRespendLimit, nSize)) + { + LogPrint("mempool", "Double-spend relay rejected by rate limiter\n"); + return false; + } + + LogPrint("mempool", "Rate limit dRespendCount: %g => %g\n", dRespendCount, dRespendCount+nSize); + + // Clear the filter on average every MAX_DOUBLE_SPEND_BLOOM + // insertions + if (insecure_rand()%MAX_DOUBLESPEND_BLOOM == 0) + filter.clear(); + + filter.insert(outPoint); + + return true; +} bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransaction &tx, bool fLimitFree, bool* pfMissingInputs, bool fRejectInsaneFee) @@ -839,15 +957,18 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa return false; // Check for conflicts with in-memory transactions + bool relayableRespend = false; { LOCK(pool.cs); // protect pool.mapNextTx for (unsigned int i = 0; i < tx.vin.size(); i++) { COutPoint outpoint = tx.vin[i].prevout; - if (pool.mapNextTx.count(outpoint)) + // Does tx conflict with a member of the pool, and is it not equivalent to that member? + if (pool.mapNextTx.count(outpoint) && !tx.IsEquivalentTo(*pool.mapNextTx[outpoint].ptx)) { - // Disable replacement feature for now - return false; + relayableRespend = RelayableRespend(outpoint, tx, false, doubleSpendFilter); + if (!relayableRespend) + return false; } } } @@ -907,7 +1028,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa unsigned int nSize = entry.GetTxSize(); // Don't accept it if it can't get into a block - int64_t txMinFee = GetMinFee(tx, nSize, true, GMF_RELAY); + int64_t txMinFee = GetMinRelayFee(tx, nSize, true); if (fLimitFree && nFees < txMinFee) return state.DoS(0, error("AcceptToMemoryPool : not enough fees %s, %d < %d", hash.ToString(), nFees, txMinFee), @@ -916,31 +1037,23 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa // Continuously rate-limit free (really, very-low-fee)transactions // This mitigates 'penny-flooding' -- sending thousands of free transactions just to // be annoying or make others' transactions take longer to confirm. - if (fLimitFree && nFees < CTransaction::minRelayTxFee.GetFee(nSize)) + if (fLimitFree && nFees < ::minRelayTxFee.GetFee(nSize)) { - static CCriticalSection csFreeLimiter; static double dFreeCount; - static int64_t nLastTime; - int64_t nNow = GetTime(); - - LOCK(csFreeLimiter); + static int64_t nLastFreeTime; + static int64_t nFreeLimit = GetArg("-limitfreerelay", 15); - // Use an exponentially decaying ~10-minute window: - dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime)); - nLastTime = nNow; - // -limitfreerelay unit is thousand-bytes-per-minute - // At default rate it would take over a month to fill 1GB - if (dFreeCount >= GetArg("-limitfreerelay", 15)*10*1000) + if (RateLimitExceeded(dFreeCount, nLastFreeTime, nFreeLimit, nSize)) return state.DoS(0, error("AcceptToMemoryPool : free transaction rejected by rate limiter"), REJECT_INSUFFICIENTFEE, "insufficient priority"); + LogPrint("mempool", "Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize); - dFreeCount += nSize; } - if (fRejectInsaneFee && nFees > CTransaction::minRelayTxFee.GetFee(nSize) * 10000) + if (fRejectInsaneFee && nFees > ::minRelayTxFee.GetFee(nSize) * 10000) return error("AcceptToMemoryPool: : insane fees %s, %d > %d", hash.ToString(), - nFees, CTransaction::minRelayTxFee.GetFee(nSize) * 10000); + nFees, ::minRelayTxFee.GetFee(nSize) * 10000); // Check against previous transactions // This is done last to help prevent CPU exhaustion denial-of-service attacks. @@ -948,13 +1061,21 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa { return error("AcceptToMemoryPool: : ConnectInputs failed %s", hash.ToString()); } - // Store transaction in memory - pool.addUnchecked(hash, entry); + + if (relayableRespend) + { + RelayTransaction(tx); + } + else + { + // Store transaction in memory + pool.addUnchecked(hash, entry); + } } - g_signals.SyncTransaction(hash, tx, NULL); + g_signals.SyncTransaction(tx, NULL); - return true; + return !relayableRespend; } @@ -1002,10 +1123,10 @@ int CMerkleTx::GetBlocksToMaturity() const } -bool CMerkleTx::AcceptToMemoryPool(bool fLimitFree) +bool CMerkleTx::AcceptToMemoryPool(bool fLimitFree, bool fRejectInsaneFee) { CValidationState state; - return ::AcceptToMemoryPool(mempool, state, *this, fLimitFree, NULL); + return ::AcceptToMemoryPool(mempool, state, *this, fLimitFree, NULL, fRejectInsaneFee); } @@ -1194,118 +1315,6 @@ int64_t GetBlockValue(int nHeight, int64_t nFees) return nSubsidy + nFees; } -static const int64_t nTargetTimespan = 14 * 24 * 60 * 60; // two weeks -static const int64_t nTargetSpacing = 10 * 60; -static const int64_t nInterval = nTargetTimespan / nTargetSpacing; - -// -// minimum amount of work that could possibly be required nTime after -// minimum work required was nBase -// -unsigned int ComputeMinWork(unsigned int nBase, int64_t nTime) -{ - const uint256 &bnLimit = Params().ProofOfWorkLimit(); - // Testnet has min-difficulty blocks - // after nTargetSpacing*2 time between blocks: - if (Params().AllowMinDifficultyBlocks() && nTime > nTargetSpacing*2) - return bnLimit.GetCompact(); - - uint256 bnResult; - bnResult.SetCompact(nBase); - while (nTime > 0 && bnResult < bnLimit) - { - // Maximum 400% adjustment... - bnResult *= 4; - // ... in best-case exactly 4-times-normal target time - nTime -= nTargetTimespan*4; - } - if (bnResult > bnLimit) - bnResult = bnLimit; - return bnResult.GetCompact(); -} - -unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHeader *pblock) -{ - unsigned int nProofOfWorkLimit = Params().ProofOfWorkLimit().GetCompact(); - - // Genesis block - if (pindexLast == NULL) - return nProofOfWorkLimit; - - // Only change once per interval - if ((pindexLast->nHeight+1) % nInterval != 0) - { - if (Params().AllowMinDifficultyBlocks()) - { - // Special difficulty rule for testnet: - // If the new block's timestamp is more than 2* 10 minutes - // then allow mining of a min-difficulty block. - if (pblock->nTime > pindexLast->nTime + nTargetSpacing*2) - return nProofOfWorkLimit; - else - { - // Return the last non-special-min-difficulty-rules-block - const CBlockIndex* pindex = pindexLast; - while (pindex->pprev && pindex->nHeight % nInterval != 0 && pindex->nBits == nProofOfWorkLimit) - pindex = pindex->pprev; - return pindex->nBits; - } - } - return pindexLast->nBits; - } - - // Go back by what we want to be 14 days worth of blocks - const CBlockIndex* pindexFirst = pindexLast; - for (int i = 0; pindexFirst && i < nInterval-1; i++) - pindexFirst = pindexFirst->pprev; - assert(pindexFirst); - - // Limit adjustment step - int64_t nActualTimespan = pindexLast->GetBlockTime() - pindexFirst->GetBlockTime(); - LogPrintf(" nActualTimespan = %d before bounds\n", nActualTimespan); - if (nActualTimespan < nTargetTimespan/4) - nActualTimespan = nTargetTimespan/4; - if (nActualTimespan > nTargetTimespan*4) - nActualTimespan = nTargetTimespan*4; - - // Retarget - uint256 bnNew; - uint256 bnOld; - bnNew.SetCompact(pindexLast->nBits); - bnOld = bnNew; - bnNew *= nActualTimespan; - bnNew /= nTargetTimespan; - - if (bnNew > Params().ProofOfWorkLimit()) - bnNew = Params().ProofOfWorkLimit(); - - /// debug print - LogPrintf("GetNextWorkRequired RETARGET\n"); - LogPrintf("nTargetTimespan = %d nActualTimespan = %d\n", nTargetTimespan, nActualTimespan); - LogPrintf("Before: %08x %s\n", pindexLast->nBits, bnOld.ToString()); - LogPrintf("After: %08x %s\n", bnNew.GetCompact(), bnNew.ToString()); - - return bnNew.GetCompact(); -} - -bool CheckProofOfWork(uint256 hash, unsigned int nBits) -{ - bool fNegative; - bool fOverflow; - uint256 bnTarget; - bnTarget.SetCompact(nBits, &fNegative, &fOverflow); - - // Check range - if (fNegative || bnTarget == 0 || fOverflow || bnTarget > Params().ProofOfWorkLimit()) - return error("CheckProofOfWork() : nBits below minimum work"); - - // Check proof of work matches claimed amount - if (hash > bnTarget) - return error("CheckProofOfWork() : hash doesn't match nBits"); - - return true; -} - bool IsInitialBlockDownload() { LOCK(cs_main); @@ -1479,7 +1488,7 @@ void UpdateTime(CBlockHeader& block, const CBlockIndex* pindexPrev) -void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight, const uint256 &txhash) +void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight) { bool ret; // mark inputs spent @@ -1494,7 +1503,7 @@ void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCach } // add outputs - ret = inputs.SetCoins(txhash, CCoins(tx, nHeight)); + ret = inputs.SetCoins(tx.GetHash(), CCoins(tx, nHeight)); assert(ret); } @@ -1767,8 +1776,8 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C !((pindex->nHeight==91842 && pindex->GetBlockHash() == uint256("0x00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec")) || (pindex->nHeight==91880 && pindex->GetBlockHash() == uint256("0x00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721"))); if (fEnforceBIP30) { - for (unsigned int i = 0; i < block.vtx.size(); i++) { - uint256 hash = block.GetTxHash(i); + BOOST_FOREACH(const CTransaction& tx, block.vtx) { + const uint256& hash = tx.GetHash(); if (view.HaveCoins(hash) && !view.GetCoins(hash).IsPruned()) return state.DoS(100, error("ConnectBlock() : tried to overwrite transaction"), REJECT_INVALID, "bad-txns-BIP30"); @@ -1777,7 +1786,7 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C // BIP16 didn't become active until Apr 1 2012 int64_t nBIP16SwitchTime = 1333238400; - bool fStrictPayToScriptHash = (pindex->nTime >= nBIP16SwitchTime); + bool fStrictPayToScriptHash = (pindex->GetBlockTime() >= nBIP16SwitchTime); unsigned int flags = SCRIPT_VERIFY_NOCACHE | (fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE); @@ -1829,11 +1838,11 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C } CTxUndo txundo; - UpdateCoins(tx, state, view, txundo, pindex->nHeight, block.GetTxHash(i)); + UpdateCoins(tx, state, view, txundo, pindex->nHeight); if (!tx.IsCoinBase()) blockundo.vtxundo.push_back(txundo); - vPos.push_back(std::make_pair(block.GetTxHash(i), pos)); + vPos.push_back(std::make_pair(tx.GetHash(), pos)); pos.nTxOffset += ::GetSerializeSize(tx, SER_DISK, CLIENT_VERSION); } int64_t nTime = GetTimeMicros() - nStart; @@ -1892,13 +1901,13 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C assert(ret); // Watch for transactions paying to me - for (unsigned int i = 0; i < block.vtx.size(); i++) - g_signals.SyncTransaction(block.GetTxHash(i), block.vtx[i], &block); + BOOST_FOREACH(const CTransaction& tx, block.vtx) + g_signals.SyncTransaction(tx, &block); // Watch for changes to the previous coinbase transaction. static uint256 hashPrevBestCoinBase; g_signals.UpdatedTransaction(hashPrevBestCoinBase); - hashPrevBestCoinBase = block.GetTxHash(0); + hashPrevBestCoinBase = block.vtx[0].GetHash(); return true; } @@ -1996,7 +2005,7 @@ bool static DisconnectTip(CValidationState &state) { // Let wallets know transactions went from 1-confirmed to // 0-confirmed or conflicted: BOOST_FOREACH(const CTransaction &tx, block.vtx) { - SyncWithWallets(tx.GetHash(), tx, NULL); + SyncWithWallets(tx, NULL); } return true; } @@ -2036,11 +2045,11 @@ bool static ConnectTip(CValidationState &state, CBlockIndex *pindexNew) { // Tell wallet about transactions that went from mempool // to conflicted: BOOST_FOREACH(const CTransaction &tx, txConflicted) { - SyncWithWallets(tx.GetHash(), tx, NULL); + SyncWithWallets(tx, NULL); } // ... and about transactions that got confirmed: BOOST_FOREACH(const CTransaction &tx, block.vtx) { - SyncWithWallets(tx.GetHash(), tx, &block); + SyncWithWallets(tx, &block); } return true; } @@ -2206,6 +2215,7 @@ CBlockIndex* AddToBlockIndex(CBlockHeader& block) { pindexNew->pprev = (*miPrev).second; pindexNew->nHeight = pindexNew->pprev->nHeight + 1; + pindexNew->BuildSkip(); } pindexNew->nChainWork = (pindexNew->pprev ? pindexNew->pprev->nChainWork : 0) + pindexNew->GetBlockWork(); pindexNew->RaiseValidity(BLOCK_VALID_TREE); @@ -2351,28 +2361,6 @@ bool CheckBlockHeader(const CBlockHeader& block, CValidationState& state, bool f return state.Invalid(error("CheckBlockHeader() : block timestamp too far in the future"), REJECT_INVALID, "time-too-new"); - CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex); - if (pcheckpoint && block.hashPrevBlock != (chainActive.Tip() ? chainActive.Tip()->GetBlockHash() : uint256(0))) - { - // Extra checks to prevent "fill up memory by spamming with bogus blocks" - int64_t deltaTime = block.GetBlockTime() - pcheckpoint->nTime; - if (deltaTime < 0) - { - return state.DoS(100, error("CheckBlockHeader() : block with timestamp before last checkpoint"), - REJECT_CHECKPOINT, "time-too-old"); - } - bool fOverflow = false; - uint256 bnNewBlock; - bnNewBlock.SetCompact(block.nBits, NULL, &fOverflow); - uint256 bnRequired; - bnRequired.SetCompact(ComputeMinWork(pcheckpoint->nBits, deltaTime)); - if (fOverflow || bnNewBlock > bnRequired) - { - return state.DoS(100, error("CheckBlockHeader() : block with too little proof-of-work"), - REJECT_INVALID, "bad-diffbits"); - } - } - return true; } @@ -2403,16 +2391,11 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo if (!CheckTransaction(tx, state)) return error("CheckBlock() : CheckTransaction failed"); - // Build the merkle tree already. We need it anyway later, and it makes the - // block cache the transaction hashes, which means they don't need to be - // recalculated many times during this block's validation. - block.BuildMerkleTree(); - // Check for duplicate txids. This is caught by ConnectInputs(), // but catching it earlier avoids a potential DoS attack: set<uint256> uniqueTx; - for (unsigned int i = 0; i < block.vtx.size(); i++) { - uniqueTx.insert(block.GetTxHash(i)); + BOOST_FOREACH(const CTransaction &tx, block.vtx) { + uniqueTx.insert(tx.GetHash()); } if (uniqueTx.size() != block.vtx.size()) return state.DoS(100, error("CheckBlock() : duplicate transaction"), @@ -2428,7 +2411,7 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo REJECT_INVALID, "bad-blk-sigops", true); // Check merkle root - if (fCheckMerkleRoot && block.hashMerkleRoot != block.vMerkleTree.back()) + if (fCheckMerkleRoot && block.hashMerkleRoot != block.BuildMerkleTree()) return state.DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"), REJECT_INVALID, "bad-txnmrklroot", true); @@ -2448,6 +2431,28 @@ bool AcceptBlockHeader(CBlockHeader& block, CValidationState& state, CBlockIndex return state.Invalid(error("AcceptBlock() : block is marked invalid"), 0, "duplicate"); } + CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex); + if (pcheckpoint && block.hashPrevBlock != (chainActive.Tip() ? chainActive.Tip()->GetBlockHash() : uint256(0))) + { + // Extra checks to prevent "fill up memory by spamming with bogus blocks" + int64_t deltaTime = block.GetBlockTime() - pcheckpoint->GetBlockTime(); + if (deltaTime < 0) + { + return state.DoS(100, error("CheckBlockHeader() : block with timestamp before last checkpoint"), + REJECT_CHECKPOINT, "time-too-old"); + } + bool fOverflow = false; + uint256 bnNewBlock; + bnNewBlock.SetCompact(block.nBits, NULL, &fOverflow); + uint256 bnRequired; + bnRequired.SetCompact(ComputeMinWork(pcheckpoint->nBits, deltaTime)); + if (fOverflow || bnNewBlock > bnRequired) + { + return state.DoS(100, error("CheckBlockHeader() : block with too little proof-of-work"), + REJECT_INVALID, "bad-diffbits"); + } + } + // Get prev block index CBlockIndex* pindexPrev = NULL; int nHeight = 0; @@ -2541,7 +2546,7 @@ bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex, CDiskBlockPos blockPos; if (dbp != NULL) blockPos = *dbp; - if (!FindBlockPos(state, blockPos, nBlockSize+8, nHeight, block.nTime, dbp != NULL)) + if (!FindBlockPos(state, blockPos, nBlockSize+8, nHeight, block.GetBlockTime(), dbp != NULL)) return error("AcceptBlock() : FindBlockPos failed"); if (dbp == NULL) if (!WriteBlockToDisk(block, blockPos)) @@ -2568,6 +2573,55 @@ bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, uns return (nFound >= nRequired); } +/** Turn the lowest '1' bit in the binary representation of a number into a '0'. */ +int static inline InvertLowestOne(int n) { return n & (n - 1); } + +/** Compute what height to jump back to with the CBlockIndex::pskip pointer. */ +int static inline GetSkipHeight(int height) { + if (height < 2) + return 0; + + // Determine which height to jump back to. Any number strictly lower than height is acceptable, + // but the following expression seems to perform well in simulations (max 110 steps to go back + // up to 2**18 blocks). + return (height & 1) ? InvertLowestOne(InvertLowestOne(height - 1)) + 1 : InvertLowestOne(height); +} + +CBlockIndex* CBlockIndex::GetAncestor(int height) +{ + if (height > nHeight || height < 0) + return NULL; + + CBlockIndex* pindexWalk = this; + int heightWalk = nHeight; + while (heightWalk > height) { + int heightSkip = GetSkipHeight(heightWalk); + int heightSkipPrev = GetSkipHeight(heightWalk - 1); + if (heightSkip == height || + (heightSkip > height && !(heightSkipPrev < heightSkip - 2 && + heightSkipPrev >= height))) { + // Only follow pskip if pprev->pskip isn't better than pskip->pprev. + pindexWalk = pindexWalk->pskip; + heightWalk = heightSkip; + } else { + pindexWalk = pindexWalk->pprev; + heightWalk--; + } + } + return pindexWalk; +} + +const CBlockIndex* CBlockIndex::GetAncestor(int height) const +{ + return const_cast<CBlockIndex*>(this)->GetAncestor(height); +} + +void CBlockIndex::BuildSkip() +{ + if (pprev) + pskip = pprev->GetAncestor(GetSkipHeight(nHeight)); +} + void PushGetBlocks(CNode* pnode, CBlockIndex* pindexBegin, uint256 hashEnd) { AssertLockHeld(cs_main); @@ -2682,8 +2736,8 @@ CMerkleBlock::CMerkleBlock(const CBlock& block, CBloomFilter& filter) for (unsigned int i = 0; i < block.vtx.size(); i++) { - uint256 hash = block.vtx[i].GetHash(); - if (filter.IsRelevantAndUpdate(block.vtx[i], hash)) + const uint256& hash = block.vtx[i].GetHash(); + if (filter.IsRelevantAndUpdate(block.vtx[i])) { vMatch.push_back(true); vMatchedTxn.push_back(make_pair(i, hash)); @@ -2918,6 +2972,8 @@ bool static LoadBlockIndexDB() setBlockIndexValid.insert(pindex); if (pindex->nStatus & BLOCK_FAILED_MASK && (!pindexBestInvalid || pindex->nChainWork > pindexBestInvalid->nChainWork)) pindexBestInvalid = pindex; + if (pindex->pprev) + pindex->BuildSkip(); } // Load block file info @@ -3088,7 +3144,7 @@ bool InitBlockIndex() { unsigned int nBlockSize = ::GetSerializeSize(block, SER_DISK, CLIENT_VERSION); CDiskBlockPos blockPos; CValidationState state; - if (!FindBlockPos(state, blockPos, nBlockSize+8, 0, block.nTime)) + if (!FindBlockPos(state, blockPos, nBlockSize+8, 0, block.GetBlockTime())) return error("LoadBlockIndex() : FindBlockPos failed"); if (!WriteBlockToDisk(block, blockPos)) return error("LoadBlockIndex() : writing genesis block to disk failed"); @@ -3477,10 +3533,10 @@ void static ProcessGetData(CNode* pfrom) } } -bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) +bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, int64_t nTimeReceived) { RandAddSeedPerfmon(); - LogPrint("net", "received: %s (%u bytes)\n", strCommand, vRecv.size()); + LogPrint("net", "received: %s (%u bytes) peer=%d\n", strCommand, vRecv.size(), pfrom->id); if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0) { LogPrintf("dropmessagestest DROPPING RECV MESSAGE\n"); @@ -3512,7 +3568,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) if (pfrom->nVersion < MIN_PEER_PROTO_VERSION) { // disconnect from peers older than this proto version - LogPrintf("partner %s using obsolete version %i; disconnecting\n", pfrom->addr.ToString(), pfrom->nVersion); + LogPrintf("peer=%d using obsolete version %i; disconnecting\n", pfrom->id, pfrom->nVersion); pfrom->PushMessage("reject", strCommand, REJECT_OBSOLETE, strprintf("Version must be %d or greater", MIN_PEER_PROTO_VERSION)); pfrom->fDisconnect = true; @@ -3593,7 +3649,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) pfrom->fSuccessfullyConnected = true; - LogPrintf("receive version message: %s: version %d, blocks=%d, us=%s, them=%s, peer=%s\n", pfrom->cleanSubVer, pfrom->nVersion, pfrom->nStartingHeight, addrMe.ToString(), addrFrom.ToString(), pfrom->addr.ToString()); + LogPrintf("receive version message: %s: version %d, blocks=%d, us=%s, peer=%d\n", pfrom->cleanSubVer, pfrom->nVersion, pfrom->nStartingHeight, addrMe.ToString(), pfrom->id); AddTimeData(pfrom->addr, nTime); } @@ -3700,7 +3756,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) pfrom->AddInventoryKnown(inv); bool fAlreadyHave = AlreadyHave(inv); - LogPrint("net", " got inventory: %s %s\n", inv.ToString(), fAlreadyHave ? "have" : "new"); + LogPrint("net", "got inv: %s %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom->id); if (!fAlreadyHave) { if (!fImporting && !fReindex) { @@ -3713,6 +3769,9 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) PushGetBlocks(pfrom, chainActive.Tip(), GetOrphanRoot(inv.hash)); } + if (inv.type == MSG_BLOCK) + UpdateBlockAvailability(pfrom->GetId(), inv.hash); + // Track requests for our stuff g_signals.Inventory(inv.hash); } @@ -3730,10 +3789,10 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) } if (fDebug || (vInv.size() != 1)) - LogPrint("net", "received getdata (%u invsz)\n", vInv.size()); + LogPrint("net", "received getdata (%u invsz) peer=%d\n", vInv.size(), pfrom->id); if ((fDebug && vInv.size() > 0) || (vInv.size() == 1)) - LogPrint("net", "received getdata for: %s\n", vInv[0].ToString()); + LogPrint("net", "received getdata for: %s peer=%d\n", vInv[0].ToString(), pfrom->id); pfrom->vRecvGetData.insert(pfrom->vRecvGetData.end(), vInv.begin(), vInv.end()); ProcessGetData(pfrom); @@ -3755,7 +3814,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) if (pindex) pindex = chainActive.Next(pindex); int nLimit = 500; - LogPrint("net", "getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString(), nLimit); + LogPrint("net", "getblocks %d to %s limit %d from peer=%d\n", (pindex ? pindex->nHeight : -1), hashStop==uint256(0) ? "end" : hashStop.ToString(), nLimit, pfrom->id); for (; pindex; pindex = chainActive.Next(pindex)) { if (pindex->GetBlockHash() == hashStop) @@ -3832,14 +3891,14 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) if (AcceptToMemoryPool(mempool, state, tx, true, &fMissingInputs)) { mempool.check(pcoinsTip); - RelayTransaction(tx, inv.hash); + RelayTransaction(tx); mapAlreadyAskedFor.erase(inv); vWorkQueue.push_back(inv.hash); vEraseQueue.push_back(inv.hash); - LogPrint("mempool", "AcceptToMemoryPool: %s %s : accepted %s (poolsz %u)\n", - pfrom->addr.ToString(), pfrom->cleanSubVer, + LogPrint("mempool", "AcceptToMemoryPool: peer=%d %s : accepted %s (poolsz %u)\n", + pfrom->id, pfrom->cleanSubVer, tx.GetHash().ToString(), mempool.mapTx.size()); @@ -3862,7 +3921,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) if (AcceptToMemoryPool(mempool, stateDummy, orphanTx, true, &fMissingInputs2)) { LogPrint("mempool", " accepted orphan tx %s\n", orphanHash.ToString()); - RelayTransaction(orphanTx, orphanHash); + RelayTransaction(orphanTx); mapAlreadyAskedFor.erase(CInv(MSG_TX, orphanHash)); vWorkQueue.push_back(orphanHash); vEraseQueue.push_back(orphanHash); @@ -3892,8 +3951,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) int nDoS = 0; if (state.IsInvalid(nDoS)) { - LogPrint("mempool", "%s from %s %s was not accepted into the memory pool: %s\n", tx.GetHash().ToString(), - pfrom->addr.ToString(), pfrom->cleanSubVer, + LogPrint("mempool", "%s from peer=%d %s was not accepted into the memory pool: %s\n", tx.GetHash().ToString(), + pfrom->id, pfrom->cleanSubVer, state.GetRejectReason()); pfrom->PushMessage("reject", strCommand, state.GetRejectCode(), state.GetRejectReason(), inv.hash); @@ -3908,7 +3967,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) CBlock block; vRecv >> block; - LogPrint("net", "received block %s\n", block.GetHash().ToString()); + LogPrint("net", "received block %s peer=%d\n", block.GetHash().ToString(), pfrom->id); // block.print(); CInv inv(MSG_BLOCK, block.GetHash()); @@ -3923,6 +3982,16 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) CValidationState state; ProcessBlock(state, pfrom, &block); + int nDoS; + if (state.IsInvalid(nDoS)) { + pfrom->PushMessage("reject", strCommand, state.GetRejectCode(), + state.GetRejectReason(), inv.hash); + if (nDoS > 0) { + LOCK(cs_main); + Misbehaving(pfrom->GetId(), nDoS); + } + } + } @@ -3947,7 +4016,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) CTransaction tx; bool fInMemPool = mempool.lookup(hash, tx); if (!fInMemPool) continue; // another thread removed since queryHashes, maybe... - if ((pfrom->pfilter && pfrom->pfilter->IsRelevantAndUpdate(tx, hash)) || + if ((pfrom->pfilter && pfrom->pfilter->IsRelevantAndUpdate(tx)) || (!pfrom->pfilter)) vInv.push_back(inv); if (vInv.size() == MAX_INV_SZ) { @@ -3984,7 +4053,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) else if (strCommand == "pong") { - int64_t pingUsecEnd = GetTimeMicros(); + int64_t pingUsecEnd = nTimeReceived; uint64_t nonce = 0; size_t nAvail = vRecv.in_avail(); bool bPingFinished = false; @@ -4025,8 +4094,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) } if (!(sProblem.empty())) { - LogPrint("net", "pong %s %s: %s, %x expected, %x received, %u bytes\n", - pfrom->addr.ToString(), + LogPrint("net", "pong peer=%d %s: %s, %x expected, %x received, %u bytes\n", + pfrom->id, pfrom->cleanSubVer, sProblem, pfrom->nPingNonceSent, @@ -4144,6 +4213,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv) else { // Ignore unknown commands for extensibility + LogPrint("net", "Unknown command \"%s\" from peer=%d\n", SanitizeString(strCommand), pfrom->id); } @@ -4234,7 +4304,7 @@ bool ProcessMessages(CNode* pfrom) bool fRet = false; try { - fRet = ProcessMessage(pfrom, strCommand, vRecv); + fRet = ProcessMessage(pfrom, strCommand, vRecv, msg.nTime); boost::this_thread::interruption_point(); } catch (std::ios_base::failure& e) @@ -4265,7 +4335,7 @@ bool ProcessMessages(CNode* pfrom) } if (!fRet) - LogPrintf("ProcessMessage(%s, %u bytes) FAILED\n", strCommand, nMessageSize); + LogPrintf("ProcessMessage(%s, %u bytes) FAILED peer=%d\n", strCommand, nMessageSize, pfrom->id); break; } @@ -4458,6 +4528,9 @@ bool SendMessages(CNode* pto, bool fSendTrickle) pto->fDisconnect = true; } + // Update knowledge of peer's block availability. + ProcessBlockAvailability(pto->GetId()); + // // Message: getdata (blocks) // @@ -4466,7 +4539,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle) uint256 hash = state.vBlocksToDownload.front(); vGetData.push_back(CInv(MSG_BLOCK, hash)); MarkBlockAsInFlight(pto->GetId(), hash); - LogPrint("net", "Requesting block %s from %s\n", hash.ToString(), state.name); + LogPrint("net", "Requesting block %s peer=%d\n", hash.ToString(), pto->id); if (vGetData.size() >= 1000) { pto->PushMessage("getdata", vGetData); @@ -4483,7 +4556,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle) if (!AlreadyHave(inv)) { if (fDebug) - LogPrint("net", "sending getdata: %s\n", inv.ToString()); + LogPrint("net", "Requesting %s peer=%d\n", inv.ToString(), pto->id); vGetData.push_back(inv); if (vGetData.size() >= 1000) { |