From b7e201181bcc0f6328e0a499803f1dbb2c2dbd28 Mon Sep 17 00:00:00 2001 From: Suhas Daftuar Date: Tue, 26 Jul 2016 16:50:48 -0400 Subject: Prevent fingerprinting, disk-DoS with compact blocks - Ignore GETBLOCKTXN requests for unknown blocks Don't disconnect peers, or else we leak information that could be used for fingerprinting. - Ignore CMPCTBLOCK messages for pruned blocks Also ignores CMPCTBLOCK announcements that have too little work. This is to prevent disk-exhaustion DoS. Github-Pull: #8408 Rebased-From: 1de2a46632946990a7863020b61172232f8c5796 1d06e49834814eed45e07393dcffd7b6683311b2 --- src/main.cpp | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/src/main.cpp b/src/main.cpp index 70f0a42475..a80eb62126 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -5344,7 +5344,6 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, BlockMap::iterator it = mapBlockIndex.find(req.blockhash); if (it == mapBlockIndex.end() || !(it->second->nStatus & BLOCK_HAVE_DATA)) { - Misbehaving(pfrom->GetId(), 100); LogPrintf("Peer %d sent us a getblocktxn for a block we don't have", pfrom->id); return true; } @@ -5628,8 +5627,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, std::vector vInv(1); vInv[0] = CInv(MSG_BLOCK, cmpctblock.header.GetHash()); pfrom->PushMessage(NetMsgType::GETDATA, vInv); - return true; } + return true; } // If we're not close to tip yet, give up and let parallel block fetch work its magic -- cgit v1.2.3