diff options
Diffstat (limited to 'src/net.cpp')
-rw-r--r-- | src/net.cpp | 60 |
1 files changed, 57 insertions, 3 deletions
diff --git a/src/net.cpp b/src/net.cpp index f5e8b71c03..0e861236df 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -726,6 +726,52 @@ void CNode::Cleanup() } +std::map<unsigned int, int64> CNode::setBanned; +CCriticalSection CNode::cs_setBanned; + +void CNode::ClearBanned() +{ + setBanned.clear(); +} + +bool CNode::IsBanned(unsigned int ip) +{ + bool fResult = false; + CRITICAL_BLOCK(cs_setBanned) + { + std::map<unsigned int, int64>::iterator i = setBanned.find(ip); + if (i != setBanned.end()) + { + int64 t = (*i).second; + if (GetTime() < t) + fResult = true; + } + } + return fResult; +} + +bool CNode::Misbehaving(int howmuch) +{ + if (addr.IsLocal()) + { + printf("Warning: local node %s misbehaving\n", addr.ToString().c_str()); + return false; + } + + nMisbehavior += howmuch; + if (nMisbehavior >= GetArg("-banscore", 100)) + { + int64 banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban + CRITICAL_BLOCK(cs_setBanned) + if (setBanned[addr.ip] < banTime) + setBanned[addr.ip] = banTime; + CloseSocketDisconnect(); + printf("Disconnected %s for misbehavior (score=%d)\n", addr.ToString().c_str(), nMisbehavior); + return true; + } + return false; +} + @@ -896,6 +942,11 @@ void ThreadSocketHandler2(void* parg) { closesocket(hSocket); } + else if (CNode::IsBanned(addr.ip)) + { + printf("connetion from %s dropped (banned)\n", addr.ToString().c_str()); + closesocket(hSocket); + } else { printf("accepted connection %s\n", addr.ToString().c_str()); @@ -1387,6 +1438,8 @@ void ThreadOpenConnections2(void* parg) BOOST_FOREACH(CNode* pnode, vNodes) setConnected.insert(pnode->addr.ip & 0x0000ffff); + int64 nANow = GetAdjustedTime(); + CRITICAL_BLOCK(cs_mapAddresses) { BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses) @@ -1394,8 +1447,8 @@ void ThreadOpenConnections2(void* parg) const CAddress& addr = item.second; if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip & 0x0000ffff)) continue; - int64 nSinceLastSeen = GetAdjustedTime() - addr.nTime; - int64 nSinceLastTry = GetAdjustedTime() - addr.nLastTry; + int64 nSinceLastSeen = nANow - addr.nTime; + int64 nSinceLastTry = nANow - addr.nLastTry; // Randomize the order in a deterministic way, putting the standard port first int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.ip * 7789) % (2 * 60 * 60); @@ -1454,7 +1507,8 @@ bool OpenNetworkConnection(const CAddress& addrConnect) // if (fShutdown) return false; - if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() || FindNode(addrConnect.ip)) + if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() || + FindNode(addrConnect.ip) || CNode::IsBanned(addrConnect.ip)) return false; vnThreadsRunning[1]--; |