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Merge pull request #4378

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dc942e6 Introduce whitelisted peers. (Pieter Wuille)
This commit is contained in:
Wladimir J. van der Laan 2014-07-14 08:59:12 +02:00
commit c9bc398ad9
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GPG Key ID: 74810B012346C9A6
6 changed files with 99 additions and 28 deletions
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2
qa/pull-tester/run-bitcoind-for-test.sh.in
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@ -10,7 +10,7 @@ touch "$DATADIR/regtest/debug.log"
tail -q -n 1 -F "$DATADIR/regtest/debug.log" | grep -m 1 -q "Done loading" &
WAITER=$!
PORT=`expr $BASHPID + 10000`
"@abs_top_builddir@/src/bitcoind@EXEEXT@" -connect=0.0.0.0 -datadir="$DATADIR" -rpcuser=user -rpcpassword=pass -listen -keypool=3 -debug -debug=net -logtimestamps -port=$PORT -regtest -rpcport=`expr $PORT + 1` &
"@abs_top_builddir@/src/bitcoind@EXEEXT@" -connect=0.0.0.0 -datadir="$DATADIR" -rpcuser=user -rpcpassword=pass -listen -keypool=3 -debug -debug=net -logtimestamps -port=$PORT -whitelist=127.0.0.1 -regtest -rpcport=`expr $PORT + 1` &
BITCOIND=$!
#Install a watchdog.

32
src/init.cpp
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@ -58,7 +58,8 @@ CWallet* pwalletMain;
enum BindFlags {
BF_NONE = 0,
BF_EXPLICIT = (1U << 0),
BF_REPORT_ERROR = (1U << 1)
BF_REPORT_ERROR = (1U << 1),
BF_WHITELIST = (1U << 2),
};
static const char* FEE_ESTIMATES_FILENAME="fee_estimates.dat";
@ -192,7 +193,7 @@ bool static Bind(const CService &addr, unsigned int flags) {
if (!(flags & BF_EXPLICIT) && IsLimited(addr))
return false;
std::string strError;
if (!BindListenPort(addr, strError)) {
if (!BindListenPort(addr, strError, flags & BF_WHITELIST)) {
if (flags & BF_REPORT_ERROR)
return InitError(strError);
return false;
@ -252,6 +253,8 @@ std::string HelpMessage(HelpMessageMode mode)
strUsage += " -upnp " + _("Use UPnP to map the listening port (default: 0)") + "\n";
#endif
#endif
strUsage += " -whitebind=<addr> " + _("Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6") + "\n";
strUsage += " -whitelist=<netmask> " + _("Whitelist peers connecting from the given netmask or ip. Can be specified multiple times.") + "\n";
#ifdef ENABLE_WALLET
strUsage += "\n" + _("Wallet options:") + "\n";
@ -506,11 +509,11 @@ bool AppInit2(boost::thread_group& threadGroup)
// ********************************************************* Step 2: parameter interactions
if (mapArgs.count("-bind")) {
if (mapArgs.count("-bind") || mapArgs.count("-whitebind")) {
// when specifying an explicit binding address, you want to listen on it
// even when -connect or -proxy is specified
if (SoftSetBoolArg("-listen", true))
LogPrintf("AppInit2 : parameter interaction: -bind set -> setting -listen=1\n");
LogPrintf("AppInit2 : parameter interaction: -bind or -whitebind set -> setting -listen=1\n");
}
if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0) {
@ -554,7 +557,7 @@ bool AppInit2(boost::thread_group& threadGroup)
}
// Make sure enough file descriptors are available
int nBind = std::max((int)mapArgs.count("-bind"), 1);
int nBind = std::max((int)mapArgs.count("-bind") + (int)mapArgs.count("-whitebind"), 1);
nMaxConnections = GetArg("-maxconnections", 125);
nMaxConnections = std::max(std::min(nMaxConnections, (int)(FD_SETSIZE - nBind - MIN_CORE_FILEDESCRIPTORS)), 0);
int nFD = RaiseFileDescriptorLimit(nMaxConnections + MIN_CORE_FILEDESCRIPTORS);
@ -771,6 +774,15 @@ bool AppInit2(boost::thread_group& threadGroup)
}
}
if (mapArgs.count("-whitelist")) {
BOOST_FOREACH(const std::string& net, mapMultiArgs["-whitelist"]) {
CSubNet subnet(net);
if (!subnet.IsValid())
return InitError(strprintf(_("Invalid netmask specified in -whitelist: '%s'"), net));
CNode::AddWhitelistedRange(subnet);
}
}
CService addrProxy;
bool fProxy = false;
if (mapArgs.count("-proxy")) {
@ -807,13 +819,21 @@ bool AppInit2(boost::thread_group& threadGroup)
bool fBound = false;
if (fListen) {
if (mapArgs.count("-bind")) {
if (mapArgs.count("-bind") || mapArgs.count("-whitebind")) {
BOOST_FOREACH(std::string strBind, mapMultiArgs["-bind"]) {
CService addrBind;
if (!Lookup(strBind.c_str(), addrBind, GetListenPort(), false))
return InitError(strprintf(_("Cannot resolve -bind address: '%s'"), strBind));
fBound |= Bind(addrBind, (BF_EXPLICIT | BF_REPORT_ERROR));
}
BOOST_FOREACH(std::string strBind, mapMultiArgs["-whitebind"]) {
CService addrBind;
if (!Lookup(strBind.c_str(), addrBind, 0, false))
return InitError(strprintf(_("Cannot resolve -whitebind address: '%s'"), strBind));
if (addrBind.GetPort() == 0)
return InitError(strprintf(_("Need to specify a port with -whitebind: '%s'"), strBind));
fBound |= Bind(addrBind, (BF_EXPLICIT | BF_REPORT_ERROR | BF_WHITELIST));
}
}
else {
struct in_addr inaddr_any;

19
src/main.cpp
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@ -212,7 +212,7 @@ struct CBlockReject {
struct CNodeState {
// Accumulated misbehaviour score for this peer.
int nMisbehavior;
// Whether this peer should be disconnected and banned.
// Whether this peer should be disconnected and banned (unless whitelisted).
bool fShouldBan;
// String name of this peer (debugging/logging purposes).
std::string name;
@ -1427,7 +1427,8 @@ void Misbehaving(NodeId pnode, int howmuch)
return;
state->nMisbehavior += howmuch;
if (state->nMisbehavior >= GetArg("-banscore", 100))
int banscore = GetArg("-banscore", 100);
if (state->nMisbehavior >= banscore && state->nMisbehavior - howmuch < banscore)
{
LogPrintf("Misbehaving: %s (%d -> %d) BAN THRESHOLD EXCEEDED\n", state->name, state->nMisbehavior-howmuch, state->nMisbehavior);
state->fShouldBan = true;
@ -3952,6 +3953,11 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
unsigned int nEvicted = LimitOrphanTxSize(MAX_ORPHAN_TRANSACTIONS);
if (nEvicted > 0)
LogPrint("mempool", "mapOrphan overflow, removed %u tx\n", nEvicted);
} else if (pfrom->fWhitelisted) {
// Always relay transactions received from whitelisted peers, even
// if they are already in the mempool (allowing the node to function
// as a gateway for nodes hidden behind it).
RelayTransaction(tx);
}
int nDoS = 0;
if (state.IsInvalid(nDoS))
@ -4445,11 +4451,14 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
CNodeState &state = *State(pto->GetId());
if (state.fShouldBan) {
if (pto->addr.IsLocal())
LogPrintf("Warning: not banning local node %s!\n", pto->addr.ToString());
if (pto->fWhitelisted)
LogPrintf("Warning: not punishing whitelisted peer %s!\n", pto->addr.ToString());
else {
pto->fDisconnect = true;
CNode::Ban(pto->addr);
if (pto->addr.IsLocal())
LogPrintf("Warning: not banning local peer %s!\n", pto->addr.ToString());
else
CNode::Ban(pto->addr);
}
state.fShouldBan = false;
}

60
src/net.cpp
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@ -50,7 +50,16 @@
using namespace std;
using namespace boost;
static const int MAX_OUTBOUND_CONNECTIONS = 8;
namespace {
const int MAX_OUTBOUND_CONNECTIONS = 8;
struct ListenSocket {
SOCKET socket;
bool whitelisted;
ListenSocket(SOCKET socket, bool whitelisted) : socket(socket), whitelisted(whitelisted) {}
};
}
//
// Global state variables
@ -65,7 +74,7 @@ static bool vfLimited[NET_MAX] = {};
static CNode* pnodeLocalHost = NULL;
static CNode* pnodeSync = NULL;
uint64_t nLocalHostNonce = 0;
static std::vector<SOCKET> vhListenSocket;
static std::vector<ListenSocket> vhListenSocket;
CAddrMan addrman;
int nMaxConnections = 125;
@ -593,6 +602,24 @@ bool CNode::Ban(const CNetAddr &addr) {
return true;
}
std::vector<CSubNet> CNode::vWhitelistedRange;
CCriticalSection CNode::cs_vWhitelistedRange;
bool CNode::IsWhitelistedRange(const CNetAddr &addr) {
LOCK(cs_vWhitelistedRange);
BOOST_FOREACH(const CSubNet& subnet, vWhitelistedRange) {
if (subnet.Match(addr))
return true;
}
return false;
}
void CNode::AddWhitelistedRange(const CSubNet &subnet) {
LOCK(cs_vWhitelistedRange);
vWhitelistedRange.push_back(subnet);
}
#undef X
#define X(name) stats.name = name
void CNode::copyStats(CNodeStats &stats)
@ -609,6 +636,7 @@ void CNode::copyStats(CNodeStats &stats)
X(nStartingHeight);
X(nSendBytes);
X(nRecvBytes);
X(fWhitelisted);
stats.fSyncNode = (this == pnodeSync);
// It is common for nodes with good ping times to suddenly become lagged,
@ -848,9 +876,9 @@ void ThreadSocketHandler()
SOCKET hSocketMax = 0;
bool have_fds = false;
BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket) {
FD_SET(hListenSocket, &fdsetRecv);
hSocketMax = max(hSocketMax, hListenSocket);
BOOST_FOREACH(const ListenSocket& hListenSocket, vhListenSocket) {
FD_SET(hListenSocket.socket, &fdsetRecv);
hSocketMax = max(hSocketMax, hListenSocket.socket);
have_fds = true;
}
@ -917,13 +945,13 @@ void ThreadSocketHandler()
//
// Accept new connections
//
BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket)
BOOST_FOREACH(const ListenSocket& hListenSocket, vhListenSocket)
{
if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
if (hListenSocket.socket != INVALID_SOCKET && FD_ISSET(hListenSocket.socket, &fdsetRecv))
{
struct sockaddr_storage sockaddr;
socklen_t len = sizeof(sockaddr);
SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
SOCKET hSocket = accept(hListenSocket.socket, (struct sockaddr*)&sockaddr, &len);
CAddress addr;
int nInbound = 0;
@ -931,6 +959,7 @@ void ThreadSocketHandler()
if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr))
LogPrintf("Warning: Unknown socket family\n");
bool whitelisted = hListenSocket.whitelisted || CNode::IsWhitelistedRange(addr);
{
LOCK(cs_vNodes);
BOOST_FOREACH(CNode* pnode, vNodes)
@ -948,7 +977,7 @@ void ThreadSocketHandler()
{
closesocket(hSocket);
}
else if (CNode::IsBanned(addr))
else if (CNode::IsBanned(addr) && !whitelisted)
{
LogPrintf("connection from %s dropped (banned)\n", addr.ToString());
closesocket(hSocket);
@ -957,6 +986,7 @@ void ThreadSocketHandler()
{
CNode* pnode = new CNode(hSocket, addr, "", true);
pnode->AddRef();
pnode->fWhitelisted = whitelisted;
{
LOCK(cs_vNodes);
@ -1580,7 +1610,7 @@ void ThreadMessageHandler()
bool BindListenPort(const CService &addrBind, string& strError)
bool BindListenPort(const CService &addrBind, string& strError, bool fWhitelisted)
{
strError = "";
int nOne = 1;
@ -1661,9 +1691,9 @@ bool BindListenPort(const CService &addrBind, string& strError)
return false;
}
vhListenSocket.push_back(hListenSocket);
vhListenSocket.push_back(ListenSocket(hListenSocket, fWhitelisted));
if (addrBind.IsRoutable() && fDiscover)
if (addrBind.IsRoutable() && fDiscover && !fWhitelisted)
AddLocal(addrBind, LOCAL_BIND);
return true;
@ -1788,9 +1818,9 @@ public:
BOOST_FOREACH(CNode* pnode, vNodes)
if (pnode->hSocket != INVALID_SOCKET)
closesocket(pnode->hSocket);
BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket)
if (hListenSocket != INVALID_SOCKET)
if (closesocket(hListenSocket) == SOCKET_ERROR)
BOOST_FOREACH(ListenSocket& hListenSocket, vhListenSocket)
if (hListenSocket.socket != INVALID_SOCKET)
if (closesocket(hListenSocket.socket) == SOCKET_ERROR)
LogPrintf("closesocket(hListenSocket) failed with error %s\n", NetworkErrorString(WSAGetLastError()));
// clean up some globals (to help leak detection)

13
src/net.h
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@ -64,7 +64,7 @@ CNode* ConnectNode(CAddress addrConnect, const char *pszDest = NULL);
bool OpenNetworkConnection(const CAddress& addrConnect, CSemaphoreGrant *grantOutbound = NULL, const char *strDest = NULL, bool fOneShot = false);
void MapPort(bool fUseUPnP);
unsigned short GetListenPort();
bool BindListenPort(const CService &bindAddr, std::string& strError);
bool BindListenPort(const CService &bindAddr, std::string& strError, bool fWhitelisted = false);
void StartNode(boost::thread_group& threadGroup);
bool StopNode();
void SocketSendData(CNode *pnode);
@ -154,6 +154,7 @@ public:
uint64_t nSendBytes;
uint64_t nRecvBytes;
bool fSyncNode;
bool fWhitelisted;
double dPingTime;
double dPingWait;
std::string addrLocal;
@ -236,6 +237,7 @@ public:
// store the sanitized version in cleanSubVer. The original should be used when dealing with
// the network or wire types and the cleaned string used when displayed or logged.
std::string strSubVer, cleanSubVer;
bool fWhitelisted; // This peer can bypass DoS banning.
bool fOneShot;
bool fClient;
bool fInbound;
@ -259,6 +261,11 @@ protected:
static std::map<CNetAddr, int64_t> setBanned;
static CCriticalSection cs_setBanned;
// Whitelisted ranges. Any node connecting from these is automatically
// whitelisted (as well as those connecting to whitelisted binds).
static std::vector<CSubNet> vWhitelistedRange;
static CCriticalSection cs_vWhitelistedRange;
// Basic fuzz-testing
void Fuzz(int nChance); // modifies ssSend
@ -305,6 +312,7 @@ public:
addrName = addrNameIn == "" ? addr.ToStringIPPort() : addrNameIn;
nVersion = 0;
strSubVer = "";
fWhitelisted = false;
fOneShot = false;
fClient = false; // set by version message
fInbound = fInboundIn;
@ -720,6 +728,9 @@ public:
static bool Ban(const CNetAddr &ip);
void copyStats(CNodeStats &stats);
static bool IsWhitelistedRange(const CNetAddr &ip);
static void AddWhitelistedRange(const CSubNet &subnet);
// Network stats
static void RecordBytesRecv(uint64_t bytes);
static void RecordBytesSent(uint64_t bytes);

1
src/rpcnet.cpp
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@ -137,6 +137,7 @@ Value getpeerinfo(const Array& params, bool fHelp)
obj.push_back(Pair("syncheight", statestats.nSyncHeight));
}
obj.push_back(Pair("syncnode", stats.fSyncNode));
obj.push_back(Pair("whitelisted", stats.fWhitelisted));
ret.push_back(obj);
}