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Use cached [compact] blocks to respond to getdata messages

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This commit is contained in:
Matt Corallo 2017-02-01 16:17:54 -05:00
parent 1c2edd9f67
commit efc135ff6d
1 changed files with 30 additions and 17 deletions
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47
src/net_processing.cpp
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@ -979,6 +979,13 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
{
bool send = false;
BlockMap::iterator mi = mapBlockIndex.find(inv.hash);
std::shared_ptr<const CBlock> a_recent_block;
std::shared_ptr<const CBlockHeaderAndShortTxIDs> a_recent_compact_block;
{
LOCK(cs_most_recent_block);
a_recent_block = most_recent_block;
a_recent_compact_block = most_recent_compact_block;
}
if (mi != mapBlockIndex.end())
{
if (mi->second->nChainTx && !mi->second->IsValid(BLOCK_VALID_SCRIPTS) &&
@ -988,11 +995,6 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
// before ActivateBestChain but after AcceptBlock).
// In this case, we need to run ActivateBestChain prior to checking the relay
// conditions below.
std::shared_ptr<const CBlock> a_recent_block;
{
LOCK(cs_most_recent_block);
a_recent_block = most_recent_block;
}
CValidationState dummy;
ActivateBestChain(dummy, Params(), a_recent_block);
}
@ -1026,14 +1028,20 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
// it's available before trying to send.
if (send && (mi->second->nStatus & BLOCK_HAVE_DATA))
{
// Send block from disk
CBlock block;
if (!ReadBlockFromDisk(block, (*mi).second, consensusParams))
assert(!"cannot load block from disk");
std::shared_ptr<const CBlock> pblock;
if (a_recent_block && a_recent_block->GetHash() == (*mi).second->GetBlockHash()) {
pblock = a_recent_block;
} else {
// Send block from disk
std::shared_ptr<CBlock> pblockRead = std::make_shared<CBlock>();
if (!ReadBlockFromDisk(*pblockRead, (*mi).second, consensusParams))
assert(!"cannot load block from disk");
pblock = pblockRead;
}
if (inv.type == MSG_BLOCK)
connman.PushMessage(pfrom, msgMaker.Make(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::BLOCK, block));
connman.PushMessage(pfrom, msgMaker.Make(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::BLOCK, *pblock));
else if (inv.type == MSG_WITNESS_BLOCK)
connman.PushMessage(pfrom, msgMaker.Make(NetMsgType::BLOCK, block));
connman.PushMessage(pfrom, msgMaker.Make(NetMsgType::BLOCK, *pblock));
else if (inv.type == MSG_FILTERED_BLOCK)
{
bool sendMerkleBlock = false;
@ -1042,7 +1050,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
LOCK(pfrom->cs_filter);
if (pfrom->pfilter) {
sendMerkleBlock = true;
merkleBlock = CMerkleBlock(block, *pfrom->pfilter);
merkleBlock = CMerkleBlock(*pblock, *pfrom->pfilter);
}
}
if (sendMerkleBlock) {
@ -1055,7 +1063,7 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
// however we MUST always provide at least what the remote peer needs
typedef std::pair<unsigned int, uint256> PairType;
BOOST_FOREACH(PairType& pair, merkleBlock.vMatchedTxn)
connman.PushMessage(pfrom, msgMaker.Make(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::TX, *block.vtx[pair.first]));
connman.PushMessage(pfrom, msgMaker.Make(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::TX, *pblock->vtx[pair.first]));
}
// else
// no response
@ -1069,10 +1077,15 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
bool fPeerWantsWitness = State(pfrom->GetId())->fWantsCmpctWitness;
int nSendFlags = fPeerWantsWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS;
if (CanDirectFetch(consensusParams) && mi->second->nHeight >= chainActive.Height() - MAX_CMPCTBLOCK_DEPTH) {
CBlockHeaderAndShortTxIDs cmpctblock(block, fPeerWantsWitness);
connman.PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::CMPCTBLOCK, cmpctblock));
} else
connman.PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::BLOCK, block));
if (fPeerWantsWitness && a_recent_compact_block && a_recent_compact_block->header.GetHash() == mi->second->GetBlockHash()) {
connman.PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::CMPCTBLOCK, *a_recent_compact_block));
} else {
CBlockHeaderAndShortTxIDs cmpctblock(*pblock, fPeerWantsWitness);
connman.PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::CMPCTBLOCK, cmpctblock));
}
} else {
connman.PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::BLOCK, *pblock));
}
}
// Trigger the peer node to send a getblocks request for the next batch of inventory