diff options
Diffstat (limited to 'src/net.cpp')
| -rw-r--r-- | src/net.cpp | 271 |
1 files changed, 255 insertions, 16 deletions
diff --git a/src/net.cpp b/src/net.cpp index 541318e74..2c7ba0ca7 100644 --- a/src/net.cpp +++ b/src/net.cpp @@ -333,6 +333,15 @@ CNode* FindNode(const CNetAddr& ip) return NULL; } +CNode* FindNode(const CSubNet& subNet) +{ + LOCK(cs_vNodes); + BOOST_FOREACH(CNode* pnode, vNodes) + if (subNet.Match((CNetAddr)pnode->addr)) + return (pnode); + return NULL; +} + CNode* FindNode(const std::string& addrName) { LOCK(cs_vNodes); @@ -435,12 +444,15 @@ void CNode::PushVersion() -std::map<CNetAddr, int64_t> CNode::setBanned; +banmap_t CNode::setBanned; CCriticalSection CNode::cs_setBanned; +bool CNode::setBannedIsDirty; void CNode::ClearBanned() { + LOCK(cs_setBanned); setBanned.clear(); + setBannedIsDirty = true; } bool CNode::IsBanned(CNetAddr ip) @@ -448,25 +460,114 @@ bool CNode::IsBanned(CNetAddr ip) bool fResult = false; { LOCK(cs_setBanned); - std::map<CNetAddr, int64_t>::iterator i = setBanned.find(ip); - if (i != setBanned.end()) + for (banmap_t::iterator it = setBanned.begin(); it != setBanned.end(); it++) { - int64_t t = (*i).second; - if (GetTime() < t) + CSubNet subNet = (*it).first; + CBanEntry banEntry = (*it).second; + + if(subNet.Match(ip) && GetTime() < banEntry.nBanUntil) fResult = true; } } return fResult; } -bool CNode::Ban(const CNetAddr &addr) { - int64_t banTime = GetTime()+GetArg("-bantime", 60*60*24); // Default 24-hour ban +bool CNode::IsBanned(CSubNet subnet) +{ + bool fResult = false; { LOCK(cs_setBanned); - if (setBanned[addr] < banTime) - setBanned[addr] = banTime; + banmap_t::iterator i = setBanned.find(subnet); + if (i != setBanned.end()) + { + CBanEntry banEntry = (*i).second; + if (GetTime() < banEntry.nBanUntil) + fResult = true; + } + } + return fResult; +} + +void CNode::Ban(const CNetAddr& addr, const BanReason &banReason, int64_t bantimeoffset, bool sinceUnixEpoch) { + CSubNet subNet(addr); + Ban(subNet, banReason, bantimeoffset, sinceUnixEpoch); +} + +void CNode::Ban(const CSubNet& subNet, const BanReason &banReason, int64_t bantimeoffset, bool sinceUnixEpoch) { + CBanEntry banEntry(GetTime()); + banEntry.banReason = banReason; + if (bantimeoffset <= 0) + { + bantimeoffset = GetArg("-bantime", 60*60*24); // Default 24-hour ban + sinceUnixEpoch = false; + } + banEntry.nBanUntil = (sinceUnixEpoch ? 0 : GetTime() )+bantimeoffset; + + + LOCK(cs_setBanned); + if (setBanned[subNet].nBanUntil < banEntry.nBanUntil) + setBanned[subNet] = banEntry; + + setBannedIsDirty = true; +} + +bool CNode::Unban(const CNetAddr &addr) { + CSubNet subNet(addr); + return Unban(subNet); +} + +bool CNode::Unban(const CSubNet &subNet) { + LOCK(cs_setBanned); + if (setBanned.erase(subNet)) + { + setBannedIsDirty = true; + return true; + } + return false; +} + +void CNode::GetBanned(banmap_t &banMap) +{ + LOCK(cs_setBanned); + banMap = setBanned; //create a thread safe copy +} + +void CNode::SetBanned(const banmap_t &banMap) +{ + LOCK(cs_setBanned); + setBanned = banMap; + setBannedIsDirty = true; +} + +void CNode::SweepBanned() +{ + int64_t now = GetTime(); + + LOCK(cs_setBanned); + banmap_t::iterator it = setBanned.begin(); + while(it != setBanned.end()) + { + CBanEntry banEntry = (*it).second; + if(now > banEntry.nBanUntil) + { + setBanned.erase(it++); + setBannedIsDirty = true; + } + else + ++it; } - return true; +} + +bool CNode::BannedSetIsDirty() +{ + LOCK(cs_setBanned); + return setBannedIsDirty; +} + +void CNode::SetBannedSetDirty(bool dirty) +{ + LOCK(cs_setBanned); //reuse setBanned lock for the isDirty flag + setBannedIsDirty = dirty; } @@ -1172,6 +1273,17 @@ void DumpAddresses() addrman.size(), GetTimeMillis() - nStart); } +void DumpData() +{ + DumpAddresses(); + + if (CNode::BannedSetIsDirty()) + { + DumpBanlist(); + CNode::SetBannedSetDirty(false); + } +} + void static ProcessOneShot() { string strDest; @@ -1610,6 +1722,17 @@ void StartNode(boost::thread_group& threadGroup, CScheduler& scheduler) if (!adb.Read(addrman)) LogPrintf("Invalid or missing peers.dat; recreating\n"); } + + //try to read stored banlist + CBanDB bandb; + banmap_t banmap; + if (!bandb.Read(banmap)) + LogPrintf("Invalid or missing banlist.dat; recreating\n"); + + CNode::SetBanned(banmap); //thread save setter + CNode::SetBannedSetDirty(false); //no need to write down just read or nonexistent data + CNode::SweepBanned(); //sweap out unused entries + LogPrintf("Loaded %i addresses from peers.dat %dms\n", addrman.size(), GetTimeMillis() - nStart); fAddressesInitialized = true; @@ -1650,7 +1773,7 @@ void StartNode(boost::thread_group& threadGroup, CScheduler& scheduler) threadGroup.create_thread(boost::bind(&TraceThread<void (*)()>, "msghand", &ThreadMessageHandler)); // Dump network addresses - scheduler.scheduleEvery(&DumpAddresses, DUMP_ADDRESSES_INTERVAL); + scheduler.scheduleEvery(&DumpData, DUMP_ADDRESSES_INTERVAL); } bool StopNode() @@ -1663,7 +1786,7 @@ bool StopNode() if (fAddressesInitialized) { - DumpAddresses(); + DumpData(); fAddressesInitialized = false; } @@ -1867,11 +1990,11 @@ bool CAddrDB::Read(CAddrMan& addr) return error("%s: Failed to open file %s", __func__, pathAddr.string()); // use file size to size memory buffer - int fileSize = boost::filesystem::file_size(pathAddr); - int dataSize = fileSize - sizeof(uint256); + uint64_t fileSize = boost::filesystem::file_size(pathAddr); + uint64_t dataSize = 0; // Don't try to resize to a negative number if file is small - if (dataSize < 0) - dataSize = 0; + if (fileSize >= sizeof(uint256)) + dataSize = fileSize - sizeof(uint256); vector<unsigned char> vchData; vchData.resize(dataSize); uint256 hashIn; @@ -2067,3 +2190,119 @@ void CNode::EndMessage() UNLOCK_FUNCTION(cs_vSend) LEAVE_CRITICAL_SECTION(cs_vSend); } + +// +// CBanDB +// + +CBanDB::CBanDB() +{ + pathBanlist = GetDataDir() / "banlist.dat"; +} + +bool CBanDB::Write(const banmap_t& banSet) +{ + // Generate random temporary filename + unsigned short randv = 0; + GetRandBytes((unsigned char*)&randv, sizeof(randv)); + std::string tmpfn = strprintf("banlist.dat.%04x", randv); + + // serialize banlist, checksum data up to that point, then append csum + CDataStream ssBanlist(SER_DISK, CLIENT_VERSION); + ssBanlist << FLATDATA(Params().MessageStart()); + ssBanlist << banSet; + uint256 hash = Hash(ssBanlist.begin(), ssBanlist.end()); + ssBanlist << hash; + + // open temp output file, and associate with CAutoFile + boost::filesystem::path pathTmp = GetDataDir() / tmpfn; + FILE *file = fopen(pathTmp.string().c_str(), "wb"); + CAutoFile fileout(file, SER_DISK, CLIENT_VERSION); + if (fileout.IsNull()) + return error("%s: Failed to open file %s", __func__, pathTmp.string()); + + // Write and commit header, data + try { + fileout << ssBanlist; + } + catch (const std::exception& e) { + return error("%s: Serialize or I/O error - %s", __func__, e.what()); + } + FileCommit(fileout.Get()); + fileout.fclose(); + + // replace existing banlist.dat, if any, with new banlist.dat.XXXX + if (!RenameOver(pathTmp, pathBanlist)) + return error("%s: Rename-into-place failed", __func__); + + return true; +} + +bool CBanDB::Read(banmap_t& banSet) +{ + // open input file, and associate with CAutoFile + FILE *file = fopen(pathBanlist.string().c_str(), "rb"); + CAutoFile filein(file, SER_DISK, CLIENT_VERSION); + if (filein.IsNull()) + return error("%s: Failed to open file %s", __func__, pathBanlist.string()); + + // use file size to size memory buffer + uint64_t fileSize = boost::filesystem::file_size(pathBanlist); + uint64_t dataSize = 0; + // Don't try to resize to a negative number if file is small + if (fileSize >= sizeof(uint256)) + dataSize = fileSize - sizeof(uint256); + vector<unsigned char> vchData; + vchData.resize(dataSize); + uint256 hashIn; + + // read data and checksum from file + try { + filein.read((char *)&vchData[0], dataSize); + filein >> hashIn; + } + catch (const std::exception& e) { + return error("%s: Deserialize or I/O error - %s", __func__, e.what()); + } + filein.fclose(); + + CDataStream ssBanlist(vchData, SER_DISK, CLIENT_VERSION); + + // verify stored checksum matches input data + uint256 hashTmp = Hash(ssBanlist.begin(), ssBanlist.end()); + if (hashIn != hashTmp) + return error("%s: Checksum mismatch, data corrupted", __func__); + + unsigned char pchMsgTmp[4]; + try { + // de-serialize file header (network specific magic number) and .. + ssBanlist >> FLATDATA(pchMsgTmp); + + // ... verify the network matches ours + if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp))) + return error("%s: Invalid network magic number", __func__); + + // de-serialize address data into one CAddrMan object + ssBanlist >> banSet; + } + catch (const std::exception& e) { + return error("%s: Deserialize or I/O error - %s", __func__, e.what()); + } + + return true; +} + +void DumpBanlist() +{ + int64_t nStart = GetTimeMillis(); + + CNode::SweepBanned(); //clean unused entires (if bantime has expired) + + CBanDB bandb; + banmap_t banmap; + CNode::GetBanned(banmap); + bandb.Write(banmap); + + LogPrint("net", "Flushed %d banned node ips/subnets to banlist.dat %dms\n", + banmap.size(), GetTimeMillis() - nStart); +} |