diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/main.cpp | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/src/main.cpp b/src/main.cpp index babdff54ef..378c454cd2 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -5064,13 +5064,18 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, } - // This asymmetric behavior for inbound and outbound connections was introduced - // to prevent a fingerprinting attack: an attacker can send specific fake addresses - // to users' AddrMan and later request them by sending getaddr messages. - // Making nodes which are behind NAT and can only make outgoing connections ignore - // the getaddr message mitigates the attack. - else if ((strCommand == NetMsgType::GETADDR) && (pfrom->fInbound)) + else if (strCommand == NetMsgType::GETADDR) { + // This asymmetric behavior for inbound and outbound connections was introduced + // to prevent a fingerprinting attack: an attacker can send specific fake addresses + // to users' AddrMan and later request them by sending getaddr messages. + // Making nodes which are behind NAT and can only make outgoing connections ignore + // the getaddr message mitigates the attack. + if (!pfrom->fInbound) { + LogPrint("net", "Ignoring \"getaddr\" from outbound connection. peer=%d\n", pfrom->id); + return true; + } + pfrom->vAddrToSend.clear(); vector<CAddress> vAddr = addrman.GetAddr(); BOOST_FOREACH(const CAddress &addr, vAddr) |