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[refactor] move new orphan handling to ProcessInvalidTx

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glozow 2024-04-30 10:54:00 +01:00
parent c8e67b9169
commit 416fbc952b
1 changed files with 81 additions and 78 deletions
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159
src/net_processing.cpp
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@ -3006,8 +3006,11 @@ void PeerManagerImpl::ProcessInvalidTx(NodeId nodeid, const CTransactionRef& ptx
AssertLockHeld(g_msgproc_mutex);
AssertLockHeld(m_tx_download_mutex);
PeerRef peer{GetPeerRef(nodeid)};
auto& m_orphanage = m_txdownloadman.GetOrphanageRef();
auto& m_txrequest = m_txdownloadman.GetTxRequestRef();
const CTransaction& tx{*ptx};
LogDebug(BCLog::MEMPOOLREJ, "%s (wtxid=%s) from peer=%d was not accepted: %s\n",
ptx->GetHash().ToString(),
@ -3016,6 +3019,84 @@ void PeerManagerImpl::ProcessInvalidTx(NodeId nodeid, const CTransactionRef& ptx
state.ToString());
if (state.GetResult() == TxValidationResult::TX_MISSING_INPUTS) {
// Only process a new orphan if this is a first time failure, as otherwise it must be either
// already in orphanage or from 1p1c processing.
if (first_time_failure) {
bool fRejectedParents = false; // It may be the case that the orphans parents have all been rejected
// Deduplicate parent txids, so that we don't have to loop over
// the same parent txid more than once down below.
std::vector<uint256> unique_parents;
unique_parents.reserve(tx.vin.size());
for (const CTxIn& txin : tx.vin) {
// We start with all parents, and then remove duplicates below.
unique_parents.push_back(txin.prevout.hash);
}
std::sort(unique_parents.begin(), unique_parents.end());
unique_parents.erase(std::unique(unique_parents.begin(), unique_parents.end()), unique_parents.end());
// Distinguish between parents in m_lazy_recent_rejects and m_lazy_recent_rejects_reconsiderable.
// We can tolerate having up to 1 parent in m_lazy_recent_rejects_reconsiderable since we
// submit 1p1c packages. However, fail immediately if any are in m_lazy_recent_rejects.
std::optional<uint256> rejected_parent_reconsiderable;
for (const uint256& parent_txid : unique_parents) {
if (RecentRejectsFilter().contains(parent_txid)) {
fRejectedParents = true;
break;
} else if (RecentRejectsReconsiderableFilter().contains(parent_txid) && !m_mempool.exists(GenTxid::Txid(parent_txid))) {
// More than 1 parent in m_lazy_recent_rejects_reconsiderable: 1p1c will not be
// sufficient to accept this package, so just give up here.
if (rejected_parent_reconsiderable.has_value()) {
fRejectedParents = true;
break;
}
rejected_parent_reconsiderable = parent_txid;
}
}
if (!fRejectedParents) {
const auto current_time{GetTime<std::chrono::microseconds>()};
for (const uint256& parent_txid : unique_parents) {
// Here, we only have the txid (and not wtxid) of the
// inputs, so we only request in txid mode, even for
// wtxidrelay peers.
// Eventually we should replace this with an improved
// protocol for getting all unconfirmed parents.
const auto gtxid{GenTxid::Txid(parent_txid)};
if (peer) AddKnownTx(*peer, parent_txid);
// Exclude m_lazy_recent_rejects_reconsiderable: the missing parent may have been
// previously rejected for being too low feerate. This orphan might CPFP it.
if (!m_txdownloadman.AlreadyHaveTx(gtxid, /*include_reconsiderable=*/false)) {
m_txdownloadman.AddTxAnnouncement(nodeid, gtxid, current_time, /*p2p_inv=*/false);
}
}
if (m_orphanage.AddTx(ptx, nodeid)) {
AddToCompactExtraTransactions(ptx);
}
// Once added to the orphan pool, a tx is considered AlreadyHave, and we shouldn't request it anymore.
m_txrequest.ForgetTxHash(tx.GetHash());
m_txrequest.ForgetTxHash(tx.GetWitnessHash());
// DoS prevention: do not allow m_orphanage to grow unbounded (see CVE-2012-3789)
m_orphanage.LimitOrphans(m_opts.max_orphan_txs, m_rng);
} else {
LogDebug(BCLog::MEMPOOL, "not keeping orphan with rejected parents %s (wtxid=%s)\n",
tx.GetHash().ToString(),
tx.GetWitnessHash().ToString());
// We will continue to reject this tx since it has rejected
// parents so avoid re-requesting it from other peers.
// Here we add both the txid and the wtxid, as we know that
// regardless of what witness is provided, we will not accept
// this, so we don't need to allow for redownload of this txid
// from any of our non-wtxidrelay peers.
RecentRejectsFilter().insert(tx.GetHash().ToUint256());
RecentRejectsFilter().insert(tx.GetWitnessHash().ToUint256());
m_txrequest.ForgetTxHash(tx.GetHash());
m_txrequest.ForgetTxHash(tx.GetWitnessHash());
}
}
return;
} else if (state.GetResult() != TxValidationResult::TX_WITNESS_STRIPPED) {
// We can add the wtxid of this transaction to our reject filter.
@ -4375,7 +4456,6 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
LOCK2(cs_main, m_tx_download_mutex);
auto& m_txrequest = m_txdownloadman.GetTxRequestRef();
auto& m_orphanage = m_txdownloadman.GetOrphanageRef();
m_txrequest.ReceivedResponse(pfrom.GetId(), txid);
if (tx.HasWitness()) m_txrequest.ReceivedResponse(pfrom.GetId(), wtxid);
@ -4445,83 +4525,6 @@ void PeerManagerImpl::ProcessMessage(CNode& pfrom, const std::string& msg_type,
ProcessValidTx(pfrom.GetId(), ptx, result.m_replaced_transactions);
pfrom.m_last_tx_time = GetTime<std::chrono::seconds>();
}
else if (state.GetResult() == TxValidationResult::TX_MISSING_INPUTS)
{
bool fRejectedParents = false; // It may be the case that the orphans parents have all been rejected
// Deduplicate parent txids, so that we don't have to loop over
// the same parent txid more than once down below.
std::vector<uint256> unique_parents;
unique_parents.reserve(tx.vin.size());
for (const CTxIn& txin : tx.vin) {
// We start with all parents, and then remove duplicates below.
unique_parents.push_back(txin.prevout.hash);
}
std::sort(unique_parents.begin(), unique_parents.end());
unique_parents.erase(std::unique(unique_parents.begin(), unique_parents.end()), unique_parents.end());
// Distinguish between parents in m_lazy_recent_rejects and m_lazy_recent_rejects_reconsiderable.
// We can tolerate having up to 1 parent in m_lazy_recent_rejects_reconsiderable since we
// submit 1p1c packages. However, fail immediately if any are in m_lazy_recent_rejects.
std::optional<uint256> rejected_parent_reconsiderable;
for (const uint256& parent_txid : unique_parents) {
if (RecentRejectsFilter().contains(parent_txid)) {
fRejectedParents = true;
break;
} else if (RecentRejectsReconsiderableFilter().contains(parent_txid) && !m_mempool.exists(GenTxid::Txid(parent_txid))) {
// More than 1 parent in m_lazy_recent_rejects_reconsiderable: 1p1c will not be
// sufficient to accept this package, so just give up here.
if (rejected_parent_reconsiderable.has_value()) {
fRejectedParents = true;
break;
}
rejected_parent_reconsiderable = parent_txid;
}
}
if (!fRejectedParents) {
const auto current_time{GetTime<std::chrono::microseconds>()};
for (const uint256& parent_txid : unique_parents) {
// Here, we only have the txid (and not wtxid) of the
// inputs, so we only request in txid mode, even for
// wtxidrelay peers.
// Eventually we should replace this with an improved
// protocol for getting all unconfirmed parents.
const auto gtxid{GenTxid::Txid(parent_txid)};
AddKnownTx(*peer, parent_txid);
// Exclude m_lazy_recent_rejects_reconsiderable: the missing parent may have been
// previously rejected for being too low feerate. This orphan might CPFP it.
if (!m_txdownloadman.AlreadyHaveTx(gtxid, /*include_reconsiderable=*/false)) {
m_txdownloadman.AddTxAnnouncement(pfrom.GetId(), gtxid, current_time, /*p2p_inv=*/false);
}
}
if (m_orphanage.AddTx(ptx, pfrom.GetId())) {
AddToCompactExtraTransactions(ptx);
}
// Once added to the orphan pool, a tx is considered AlreadyHave, and we shouldn't request it anymore.
m_txrequest.ForgetTxHash(tx.GetHash());
m_txrequest.ForgetTxHash(tx.GetWitnessHash());
// DoS prevention: do not allow m_orphanage to grow unbounded (see CVE-2012-3789)
m_orphanage.LimitOrphans(m_opts.max_orphan_txs, m_rng);
} else {
LogDebug(BCLog::MEMPOOL, "not keeping orphan with rejected parents %s (wtxid=%s)\n",
tx.GetHash().ToString(),
tx.GetWitnessHash().ToString());
// We will continue to reject this tx since it has rejected
// parents so avoid re-requesting it from other peers.
// Here we add both the txid and the wtxid, as we know that
// regardless of what witness is provided, we will not accept
// this, so we don't need to allow for redownload of this txid
// from any of our non-wtxidrelay peers.
RecentRejectsFilter().insert(tx.GetHash().ToUint256());
RecentRejectsFilter().insert(tx.GetWitnessHash().ToUint256());
m_txrequest.ForgetTxHash(tx.GetHash());
m_txrequest.ForgetTxHash(tx.GetWitnessHash());
}
}
if (state.IsInvalid()) {
ProcessInvalidTx(pfrom.GetId(), ptx, state, /*first_time_failure=*/true);
}