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Do not answer GETDATA for to-be-announced tx

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Pieter Wuille 2020-05-07 10:29:00 -07:00 • committed by Pieter Wuille
parent f2f32a3dee
commit 2896c412fa
1 changed files with 10 additions and 2 deletions
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12
src/net_processing.cpp
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@ -1609,8 +1609,16 @@ void static ProcessGetBlockData(CNode* pfrom, const CChainParams& chainparams, c
}
//! Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed).
CTransactionRef static FindTxForGetData(const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds longlived_mempool_time) LOCKS_EXCLUDED(cs_main)
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
@ -1661,7 +1669,7 @@ void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnm
continue;
}
CTransactionRef tx = FindTxForGetData(inv.hash, mempool_req, longlived_mempool_time);
CTransactionRef tx = FindTxForGetData(pfrom, inv.hash, mempool_req, longlived_mempool_time);
if (tx) {
int nSendFlags = (inv.type == MSG_TX ? SERIALIZE_TRANSACTION_NO_WITNESS : 0);
connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *tx));