kvazar
/
kevacoin
mirror of https://github.com/kvazar-network/kevacoin.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

Refactor ProcessGetData in anticipation of avoiding cs_main for ABC

0.16
Matt Corallo 7 years ago
parent
818075adac
commit
66aa1d58a1
1 changed files with 166 additions and 155 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 321
      src/net_processing.cpp

321
src/net_processing.cpp
Unescape View File

@ -1038,182 +1038,193 @@ static void RelayAddress(const CAddress& addr, bool fReachable, CConnman* connma @@ -1038,182 +1038,193 @@ static void RelayAddress(const CAddress& addr, bool fReachable, CConnman* connma
connman->ForEachNodeThen(std::move(sortfunc), std::move(pushfunc));
}
void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParams, CConnman* connman, const std::atomic<bool>& interruptMsgProc)
void static ProcessGetBlockData(CNode* pfrom, const Consensus::Params& consensusParams, const CInv& inv, CConnman* connman, const std::atomic<bool>& interruptMsgProc)
{
std::deque<CInv>::iterator it = pfrom->vRecvGetData.begin();
std::vector<CInv> vNotFound;
const CNetMsgMaker msgMaker(pfrom->GetSendVersion());
LOCK(cs_main);
while (it != pfrom->vRecvGetData.end()) {
// Don't bother if send buffer is too full to respond anyway
if (pfrom->fPauseSend)
break;
bool send = false;
std::shared_ptr<const CBlock> a_recent_block;
std::shared_ptr<const CBlockHeaderAndShortTxIDs> a_recent_compact_block;
bool fWitnessesPresentInARecentCompactBlock;
{
LOCK(cs_most_recent_block);
a_recent_block = most_recent_block;
a_recent_compact_block = most_recent_compact_block;
fWitnessesPresentInARecentCompactBlock = fWitnessesPresentInMostRecentCompactBlock;
}
const CInv &inv = *it;
{
BlockMap::iterator mi = mapBlockIndex.find(inv.hash);
if (mi != mapBlockIndex.end())
{
if (interruptMsgProc)
return;
if (mi->second->nChainTx && !mi->second->IsValid(BLOCK_VALID_SCRIPTS) &&
mi->second->IsValid(BLOCK_VALID_TREE)) {
// If we have the block and all of its parents, but have not yet validated it,
// we might be in the middle of connecting it (ie in the unlock of cs_main
// before ActivateBestChain but after AcceptBlock).
// In this case, we need to run ActivateBestChain prior to checking the relay
// conditions below.
CValidationState dummy;
ActivateBestChain(dummy, Params(), a_recent_block);
}
}
}
BlockMap::iterator mi = mapBlockIndex.find(inv.hash);
if (mi != mapBlockIndex.end()) {
send = BlockRequestAllowed(mi->second, consensusParams);
if (!send) {
LogPrint(BCLog::NET, "%s: ignoring request from peer=%i for old block that isn't in the main chain\n", __func__, pfrom->GetId());
}
}
const CNetMsgMaker msgMaker(pfrom->GetSendVersion());
// disconnect node in case we have reached the outbound limit for serving historical blocks
// never disconnect whitelisted nodes
if (send && connman->OutboundTargetReached(true) && ( ((pindexBestHeader != nullptr) && (pindexBestHeader->GetBlockTime() - mi->second->GetBlockTime() > HISTORICAL_BLOCK_AGE)) || inv.type == MSG_FILTERED_BLOCK) && !pfrom->fWhitelisted)
{
LogPrint(BCLog::NET, "historical block serving limit reached, disconnect peer=%d\n", pfrom->GetId());
it++;
//disconnect node
pfrom->fDisconnect = true;
send = false;
}
// Avoid leaking prune-height by never sending blocks below the NODE_NETWORK_LIMITED threshold
if (send && !pfrom->fWhitelisted && (
(((pfrom->GetLocalServices() & NODE_NETWORK_LIMITED) == NODE_NETWORK_LIMITED) && ((pfrom->GetLocalServices() & NODE_NETWORK) != NODE_NETWORK) && (chainActive.Tip()->nHeight - mi->second->nHeight > (int)NODE_NETWORK_LIMITED_MIN_BLOCKS + 2 /* add two blocks buffer extension for possible races */) )
)) {
LogPrint(BCLog::NET, "Ignore block request below NODE_NETWORK_LIMITED threshold from peer=%d\n", pfrom->GetId());
if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK || inv.type == MSG_CMPCT_BLOCK || inv.type == MSG_WITNESS_BLOCK)
//disconnect node and prevent it from stalling (would otherwise wait for the missing block)
pfrom->fDisconnect = true;
send = false;
}
// Pruned nodes may have deleted the block, so check whether
// it's available before trying to send.
if (send && (mi->second->nStatus & BLOCK_HAVE_DATA))
{
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, *pblock));
else if (inv.type == MSG_WITNESS_BLOCK)
connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::BLOCK, *pblock));
else if (inv.type == MSG_FILTERED_BLOCK)
{
bool sendMerkleBlock = false;
CMerkleBlock merkleBlock;
{
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;
bool fWitnessesPresentInARecentCompactBlock;
{
LOCK(cs_most_recent_block);
a_recent_block = most_recent_block;
a_recent_compact_block = most_recent_compact_block;
fWitnessesPresentInARecentCompactBlock = fWitnessesPresentInMostRecentCompactBlock;
LOCK(pfrom->cs_filter);
if (pfrom->pfilter) {
sendMerkleBlock = true;
merkleBlock = CMerkleBlock(*pblock, *pfrom->pfilter);
}
if (mi != mapBlockIndex.end())
{
if (mi->second->nChainTx && !mi->second->IsValid(BLOCK_VALID_SCRIPTS) &&
mi->second->IsValid(BLOCK_VALID_TREE)) {
// If we have the block and all of its parents, but have not yet validated it,
// we might be in the middle of connecting it (ie in the unlock of cs_main
// before ActivateBestChain but after AcceptBlock).
// In this case, we need to run ActivateBestChain prior to checking the relay
// conditions below.
CValidationState dummy;
ActivateBestChain(dummy, Params(), a_recent_block);
}
send = BlockRequestAllowed(mi->second, consensusParams);
if (!send) {
LogPrint(BCLog::NET, "%s: ignoring request from peer=%i for old block that isn't in the main chain\n", __func__, pfrom->GetId());
}
}
if (sendMerkleBlock) {
connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::MERKLEBLOCK, merkleBlock));
// CMerkleBlock just contains hashes, so also push any transactions in the block the client did not see
// This avoids hurting performance by pointlessly requiring a round-trip
// Note that there is currently no way for a node to request any single transactions we didn't send here -
// they must either disconnect and retry or request the full block.
// Thus, the protocol spec specified allows for us to provide duplicate txn here,
// however we MUST always provide at least what the remote peer needs
typedef std::pair<unsigned int, uint256> PairType;
for (PairType& pair : merkleBlock.vMatchedTxn)
connman->PushMessage(pfrom, msgMaker.Make(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::TX, *pblock->vtx[pair.first]));
}
// else
// no response
}
else if (inv.type == MSG_CMPCT_BLOCK)
{
// If a peer is asking for old blocks, we're almost guaranteed
// they won't have a useful mempool to match against a compact block,
// and we don't feel like constructing the object for them, so
// instead we respond with the full, non-compact block.
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) {
if ((fPeerWantsWitness || !fWitnessesPresentInARecentCompactBlock) && 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));
}
// disconnect node in case we have reached the outbound limit for serving historical blocks
// never disconnect whitelisted nodes
if (send && connman->OutboundTargetReached(true) && ( ((pindexBestHeader != nullptr) && (pindexBestHeader->GetBlockTime() - mi->second->GetBlockTime() > HISTORICAL_BLOCK_AGE)) || inv.type == MSG_FILTERED_BLOCK) && !pfrom->fWhitelisted)
{
LogPrint(BCLog::NET, "historical block serving limit reached, disconnect peer=%d\n", pfrom->GetId());
} else {
connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::BLOCK, *pblock));
}
}
//disconnect node
pfrom->fDisconnect = true;
send = false;
}
// Avoid leaking prune-height by never sending blocks below the NODE_NETWORK_LIMITED threshold
if (send && !pfrom->fWhitelisted && (
(((pfrom->GetLocalServices() & NODE_NETWORK_LIMITED) == NODE_NETWORK_LIMITED) && ((pfrom->GetLocalServices() & NODE_NETWORK) != NODE_NETWORK) && (chainActive.Tip()->nHeight - mi->second->nHeight > (int)NODE_NETWORK_LIMITED_MIN_BLOCKS + 2 /* add two blocks buffer extension for possible races */) )
)) {
LogPrint(BCLog::NET, "Ignore block request below NODE_NETWORK_LIMITED threshold from peer=%d\n", pfrom->GetId());
// Trigger the peer node to send a getblocks request for the next batch of inventory
if (inv.hash == pfrom->hashContinue)
{
// Bypass PushInventory, this must send even if redundant,
// and we want it right after the last block so they don't
// wait for other stuff first.
std::vector<CInv> vInv;
vInv.push_back(CInv(MSG_BLOCK, chainActive.Tip()->GetBlockHash()));
connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::INV, vInv));
pfrom->hashContinue.SetNull();
}
}
}
//disconnect node and prevent it from stalling (would otherwise wait for the missing block)
pfrom->fDisconnect = true;
send = false;
}
// Pruned nodes may have deleted the block, so check whether
// it's available before trying to send.
if (send && (mi->second->nStatus & BLOCK_HAVE_DATA))
{
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, *pblock));
else if (inv.type == MSG_WITNESS_BLOCK)
connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::BLOCK, *pblock));
else if (inv.type == MSG_FILTERED_BLOCK)
{
bool sendMerkleBlock = false;
CMerkleBlock merkleBlock;
{
LOCK(pfrom->cs_filter);
if (pfrom->pfilter) {
sendMerkleBlock = true;
merkleBlock = CMerkleBlock(*pblock, *pfrom->pfilter);
}
}
if (sendMerkleBlock) {
connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::MERKLEBLOCK, merkleBlock));
// CMerkleBlock just contains hashes, so also push any transactions in the block the client did not see
// This avoids hurting performance by pointlessly requiring a round-trip
// Note that there is currently no way for a node to request any single transactions we didn't send here -
// they must either disconnect and retry or request the full block.
// Thus, the protocol spec specified allows for us to provide duplicate txn here,
// however we MUST always provide at least what the remote peer needs
typedef std::pair<unsigned int, uint256> PairType;
for (PairType& pair : merkleBlock.vMatchedTxn)
connman->PushMessage(pfrom, msgMaker.Make(SERIALIZE_TRANSACTION_NO_WITNESS, NetMsgType::TX, *pblock->vtx[pair.first]));
}
// else
// no response
}
else if (inv.type == MSG_CMPCT_BLOCK)
{
// If a peer is asking for old blocks, we're almost guaranteed
// they won't have a useful mempool to match against a compact block,
// and we don't feel like constructing the object for them, so
// instead we respond with the full, non-compact block.
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) {
if ((fPeerWantsWitness || !fWitnessesPresentInARecentCompactBlock) && 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));
}
}
void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParams, CConnman* connman, const std::atomic<bool>& interruptMsgProc)
{
std::deque<CInv>::iterator it = pfrom->vRecvGetData.begin();
std::vector<CInv> vNotFound;
const CNetMsgMaker msgMaker(pfrom->GetSendVersion());
{
LOCK(cs_main);
// Trigger the peer node to send a getblocks request for the next batch of inventory
if (inv.hash == pfrom->hashContinue)
{
// Bypass PushInventory, this must send even if redundant,
// and we want it right after the last block so they don't
// wait for other stuff first.
std::vector<CInv> vInv;
vInv.push_back(CInv(MSG_BLOCK, chainActive.Tip()->GetBlockHash()));
connman->PushMessage(pfrom, msgMaker.Make(NetMsgType::INV, vInv));
pfrom->hashContinue.SetNull();
}
}
}
else if (inv.type == MSG_TX || inv.type == MSG_WITNESS_TX)
{
// Send stream from relay memory
bool push = false;
auto mi = mapRelay.find(inv.hash);
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));
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;
it++;
// Send stream from relay memory
bool push = false;
auto mi = mapRelay.find(inv.hash);
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 if (pfrom->timeLastMempoolReq) {
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.
if (txinfo.tx && txinfo.nTime <= pfrom->timeLastMempoolReq) {
connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *txinfo.tx));
push = true;
} else if (pfrom->timeLastMempoolReq) {
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.
if (txinfo.tx && txinfo.nTime <= pfrom->timeLastMempoolReq) {
connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *txinfo.tx));
push = true;
}
}
if (!push) {
vNotFound.push_back(inv);
}
}
if (!push) {
vNotFound.push_back(inv);
}
// Track requests for our stuff.
GetMainSignals().Inventory(inv.hash);
}
if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK || inv.type == MSG_CMPCT_BLOCK || inv.type == MSG_WITNESS_BLOCK)
break;
if (it != pfrom->vRecvGetData.end()) {
const CInv &inv = *it;
it++;
if (inv.type == MSG_BLOCK || inv.type == MSG_FILTERED_BLOCK || inv.type == MSG_CMPCT_BLOCK || inv.type == MSG_WITNESS_BLOCK) {
ProcessGetBlockData(pfrom, consensusParams, inv, connman, interruptMsgProc);
}
}
}
} // release cs_main
pfrom->vRecvGetData.erase(pfrom->vRecvGetData.begin(), it);

Write Preview
Loading…
Cancel
Save