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protocol: drop peers sending duplicate txes #8916

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Merged
luigi1111 merged 1 commit into from
Jul 7, 2023
Merged

protocol: drop peers sending duplicate txes #8916

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10 changes: 10 additions & 0 deletions src/cryptonote_protocol/cryptonote_protocol_handler.inl
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Original file line number Diff line number Diff line change
Expand Up @@ -979,8 +979,18 @@ namespace cryptonote
int t_cryptonote_protocol_handler<t_core>::handle_notify_new_transactions(int command, NOTIFY_NEW_TRANSACTIONS::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_NEW_TRANSACTIONS (" << arg.txs.size() << " txes)");
std::unordered_set<blobdata> seen;
for (const auto &blob: arg.txs)
{
MLOGIF_P2P_MESSAGE(cryptonote::transaction tx; crypto::hash hash; bool ret = cryptonote::parse_and_validate_tx_from_blob(blob, tx, hash);, ret, "Including transaction " << hash);
if (seen.find(blob) != seen.end())
{
LOG_PRINT_CCONTEXT_L1("Duplicate transaction in notification, dropping connection");
drop_connection(context, false, false);
return 1;
}
seen.insert(blob);
}

if(context.m_state != cryptonote_connection_context::state_normal)
return 1;
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