From 047ceac142246b5d51056a51dbf4645b31802be4 Mon Sep 17 00:00:00 2001 From: Amiti Uttarwar Date: Mon, 27 Apr 2020 13:59:37 -0700 Subject: [PATCH] [net processing] ignore tx GETDATA from blocks-only peers Co-Authored-By: John Newbery --- src/net_processing.cpp | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/src/net_processing.cpp b/src/net_processing.cpp index 26327ac6ebd..7561e269e37 100644 --- a/src/net_processing.cpp +++ b/src/net_processing.cpp @@ -1595,15 +1595,13 @@ void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnm std::vector vNotFound; const CNetMsgMaker msgMaker(pfrom->GetSendVersion()); - // Note that if we receive a getdata for a MSG_TX or MSG_WITNESS_TX from a - // block-relay-only outbound peer, we will stop processing further getdata - // messages from this peer (likely resulting in our peer eventually - // disconnecting us). - if (pfrom->m_tx_relay != nullptr) { - // mempool entries added before this time have likely expired from mapRelay - const std::chrono::seconds longlived_mempool_time = GetTime() - RELAY_TX_CACHE_TIME; - const std::chrono::seconds mempool_req = pfrom->m_tx_relay->m_last_mempool_req.load(); + // mempool entries added before this time have likely expired from mapRelay + const std::chrono::seconds longlived_mempool_time = GetTime() - RELAY_TX_CACHE_TIME; + // Get last mempool request time + const std::chrono::seconds mempool_req = pfrom->m_tx_relay != nullptr ? pfrom->m_tx_relay->m_last_mempool_req.load() + : std::chrono::seconds::min(); + { LOCK(cs_main); while (it != pfrom->vRecvGetData.end() && (it->type == MSG_TX || it->type == MSG_WITNESS_TX)) { @@ -1613,8 +1611,12 @@ void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnm if (pfrom->fPauseSend) break; - const CInv &inv = *it; - it++; + const CInv &inv = *it++; + + if (pfrom->m_tx_relay == nullptr) { + // Ignore GETDATA requests for transactions from blocks-only peers. + continue; + } // Send stream from relay memory bool push = false;