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Merge #8688: Move static global randomizer seeds into CConnman

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d9ff591 Move static global randomizer seeds into CConnman (Pieter Wuille)
This commit is contained in:
Wladimir J. van der Laan 2016-09-19 17:05:35 +02:00
commit 047ded0b12
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GPG Key ID: 74810B012346C9A6
7 changed files with 34 additions and 24 deletions
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2
src/init.cpp
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@ -1116,7 +1116,7 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
// ********************************************************* Step 6: network initialization
assert(!g_connman);
g_connman = std::unique_ptr<CConnman>(new CConnman());
g_connman = std::unique_ptr<CConnman>(new CConnman(GetRand(std::numeric_limits<uint64_t>::max()), GetRand(std::numeric_limits<uint64_t>::max())));
CConnman& connman = *g_connman;
RegisterNodeSignals(GetNodeSignals());

6
src/main.cpp
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@ -113,6 +113,8 @@ CScript COINBASE_FLAGS;
const string strMessageMagic = "Bitcoin Signed Message:\n";
static const uint64_t RANDOMIZER_ID_ADDRESS_RELAY = 0x3cac0035b5866b90ULL; // SHA256("main address relay")[0:8]
// Internal stuff
namespace {
@ -4739,11 +4741,9 @@ static void RelayAddress(const CAddress& addr, bool fReachable, CConnman& connma
// Relay to a limited number of other nodes
// Use deterministic randomness to send to the same nodes for 24 hours
// at a time so the addrKnowns of the chosen nodes prevent repeats
static const uint64_t salt0 = GetRand(std::numeric_limits<uint64_t>::max());
static const uint64_t salt1 = GetRand(std::numeric_limits<uint64_t>::max());
uint64_t hashAddr = addr.GetHash();
std::multimap<uint64_t, CNode*> mapMix;
const CSipHasher hasher = CSipHasher(salt0, salt1).Write(hashAddr << 32).Write((GetTime() + hashAddr) / (24*60*60));
const CSipHasher hasher = connman.GetDeterministicRandomizer(RANDOMIZER_ID_ADDRESS_RELAY).Write(hashAddr << 32).Write((GetTime() + hashAddr) / (24*60*60));
auto sortfunc = [&mapMix, &hasher](CNode* pnode) {
if (pnode->nVersion >= CADDR_TIME_VERSION) {

23
src/net.cpp
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@ -63,6 +63,7 @@
const static std::string NET_MESSAGE_COMMAND_OTHER = "*other*";
static const uint64_t RANDOMIZER_ID_NETGROUP = 0x6c0edd8036ef4036ULL; // SHA256("netgroup")[0:8]
//
// Global state variables
//
@ -387,7 +388,7 @@ CNode* CConnman::ConnectNode(CAddress addrConnect, const char *pszDest, bool fCo
addrman.Attempt(addrConnect, fCountFailure);
// Add node
CNode* pnode = new CNode(GetNewNodeId(), nLocalServices, GetBestHeight(), hSocket, addrConnect, pszDest ? pszDest : "", false);
CNode* pnode = new CNode(GetNewNodeId(), nLocalServices, GetBestHeight(), hSocket, addrConnect, CalculateKeyedNetGroup(addrConnect), pszDest ? pszDest : "", false);
GetNodeSignals().InitializeNode(pnode->GetId(), pnode);
pnode->AddRef();
@ -1022,7 +1023,7 @@ void CConnman::AcceptConnection(const ListenSocket& hListenSocket) {
}
}
CNode* pnode = new CNode(GetNewNodeId(), nLocalServices, GetBestHeight(), hSocket, addr, "", true);
CNode* pnode = new CNode(GetNewNodeId(), nLocalServices, GetBestHeight(), hSocket, addr, CalculateKeyedNetGroup(addr), "", true);
GetNodeSignals().InitializeNode(pnode->GetId(), pnode);
pnode->AddRef();
pnode->fWhitelisted = whitelisted;
@ -2023,7 +2024,7 @@ void Discover(boost::thread_group& threadGroup)
#endif
}
CConnman::CConnman()
CConnman::CConnman(uint64_t nSeed0In, uint64_t nSeed1In) : nSeed0(nSeed0In), nSeed1(nSeed1In)
{
setBannedIsDirty = false;
fAddressesInitialized = false;
@ -2109,7 +2110,7 @@ bool CConnman::Start(boost::thread_group& threadGroup, CScheduler& scheduler, st
if (pnodeLocalHost == NULL) {
CNetAddr local;
LookupHost("127.0.0.1", local, false);
pnodeLocalHost = new CNode(GetNewNodeId(), nLocalServices, GetBestHeight(), INVALID_SOCKET, CAddress(CService(local, 0), nLocalServices));
pnodeLocalHost = new CNode(GetNewNodeId(), nLocalServices, GetBestHeight(), INVALID_SOCKET, CAddress(CService(local, 0), nLocalServices), 0);
GetNodeSignals().InitializeNode(pnodeLocalHost->GetId(), pnodeLocalHost);
}
@ -2499,10 +2500,10 @@ void CNode::Fuzz(int nChance)
unsigned int CConnman::GetReceiveFloodSize() const { return nReceiveFloodSize; }
unsigned int CConnman::GetSendBufferSize() const{ return nSendBufferMaxSize; }
CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn, SOCKET hSocketIn, const CAddress& addrIn, const std::string& addrNameIn, bool fInboundIn) :
CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn, SOCKET hSocketIn, const CAddress& addrIn, uint64_t nKeyedNetGroupIn, const std::string& addrNameIn, bool fInboundIn) :
ssSend(SER_NETWORK, INIT_PROTO_VERSION),
addr(addrIn),
nKeyedNetGroup(CalculateKeyedNetGroup(addrIn)),
nKeyedNetGroup(nKeyedNetGroupIn),
addrKnown(5000, 0.001),
filterInventoryKnown(50000, 0.000001)
{
@ -2695,12 +2696,14 @@ int64_t PoissonNextSend(int64_t nNow, int average_interval_seconds) {
return nNow + (int64_t)(log1p(GetRand(1ULL << 48) * -0.0000000000000035527136788 /* -1/2^48 */) * average_interval_seconds * -1000000.0 + 0.5);
}
/* static */ uint64_t CNode::CalculateKeyedNetGroup(const CAddress& ad)
CSipHasher CConnman::GetDeterministicRandomizer(uint64_t id)
{
static const uint64_t k0 = GetRand(std::numeric_limits<uint64_t>::max());
static const uint64_t k1 = GetRand(std::numeric_limits<uint64_t>::max());
return CSipHasher(nSeed0, nSeed1).Write(id);
}
uint64_t CConnman::CalculateKeyedNetGroup(const CAddress& ad)
{
std::vector<unsigned char> vchNetGroup(ad.GetGroup());
return CSipHasher(k0, k1).Write(&vchNetGroup[0], vchNetGroup.size()).Finalize();
return GetDeterministicRandomizer(RANDOMIZER_ID_NETGROUP).Write(&vchNetGroup[0], vchNetGroup.size()).Finalize();
}

13
src/net.h
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@ -11,6 +11,7 @@
#include "amount.h"
#include "bloom.h"
#include "compat.h"
#include "hash.h"
#include "limitedmap.h"
#include "netaddress.h"
#include "protocol.h"
@ -125,7 +126,7 @@ public:
uint64_t nMaxOutboundTimeframe = 0;
uint64_t nMaxOutboundLimit = 0;
};
CConnman();
CConnman(uint64_t seed0, uint64_t seed1);
~CConnman();
bool Start(boost::thread_group& threadGroup, CScheduler& scheduler, std::string& strNodeError, Options options);
void Stop();
@ -298,6 +299,8 @@ public:
void SetBestHeight(int height);
int GetBestHeight() const;
/** Get a unique deterministic randomizer. */
CSipHasher GetDeterministicRandomizer(uint64_t id);
private:
struct ListenSocket {
@ -315,6 +318,8 @@ private:
void ThreadSocketHandler();
void ThreadDNSAddressSeed();
uint64_t CalculateKeyedNetGroup(const CAddress& ad);
CNode* FindNode(const CNetAddr& ip);
CNode* FindNode(const CSubNet& subNet);
CNode* FindNode(const std::string& addrName);
@ -392,6 +397,9 @@ private:
int nMaxFeeler;
std::atomic<int> nBestHeight;
CClientUIInterface* clientInterface;
/** SipHasher seeds for deterministic randomness */
const uint64_t nSeed0, nSeed1;
};
extern std::unique_ptr<CConnman> g_connman;
void Discover(boost::thread_group& threadGroup);
@ -660,14 +668,13 @@ public:
CAmount lastSentFeeFilter;
int64_t nextSendTimeFeeFilter;
CNode(NodeId id, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn, SOCKET hSocketIn, const CAddress &addrIn, const std::string &addrNameIn = "", bool fInboundIn = false);
CNode(NodeId id, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn, SOCKET hSocketIn, const CAddress &addrIn, uint64_t nKeyedNetGroupIn, const std::string &addrNameIn = "", bool fInboundIn = false);
~CNode();
private:
CNode(const CNode&);
void operator=(const CNode&);
static uint64_t CalculateKeyedNetGroup(const CAddress& ad);
uint64_t nLocalHostNonce;
ServiceFlags nLocalServices;

8
src/test/DoS_tests.cpp
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@ -48,7 +48,7 @@ BOOST_AUTO_TEST_CASE(DoS_banning)
{
connman->ClearBanned();
CAddress addr1(ip(0xa0b0c001), NODE_NONE);
CNode dummyNode1(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr1, "", true);
CNode dummyNode1(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr1, 0, "", true);
GetNodeSignals().InitializeNode(dummyNode1.GetId(), &dummyNode1);
dummyNode1.nVersion = 1;
Misbehaving(dummyNode1.GetId(), 100); // Should get banned
@ -57,7 +57,7 @@ BOOST_AUTO_TEST_CASE(DoS_banning)
BOOST_CHECK(!connman->IsBanned(ip(0xa0b0c001|0x0000ff00))); // Different IP, not banned
CAddress addr2(ip(0xa0b0c002), NODE_NONE);
CNode dummyNode2(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr2, "", true);
CNode dummyNode2(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr2, 1, "", true);
GetNodeSignals().InitializeNode(dummyNode2.GetId(), &dummyNode2);
dummyNode2.nVersion = 1;
Misbehaving(dummyNode2.GetId(), 50);
@ -74,7 +74,7 @@ BOOST_AUTO_TEST_CASE(DoS_banscore)
connman->ClearBanned();
mapArgs["-banscore"] = "111"; // because 11 is my favorite number
CAddress addr1(ip(0xa0b0c001), NODE_NONE);
CNode dummyNode1(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr1, "", true);
CNode dummyNode1(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr1, 3, "", true);
GetNodeSignals().InitializeNode(dummyNode1.GetId(), &dummyNode1);
dummyNode1.nVersion = 1;
Misbehaving(dummyNode1.GetId(), 100);
@ -96,7 +96,7 @@ BOOST_AUTO_TEST_CASE(DoS_bantime)
SetMockTime(nStartTime); // Overrides future calls to GetTime()
CAddress addr(ip(0xa0b0c001), NODE_NONE);
CNode dummyNode(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr, "", true);
CNode dummyNode(id++, NODE_NETWORK, 0, INVALID_SOCKET, addr, 4, "", true);
GetNodeSignals().InitializeNode(dummyNode.GetId(), &dummyNode);
dummyNode.nVersion = 1;

4
src/test/net_tests.cpp
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@ -164,12 +164,12 @@ BOOST_AUTO_TEST_CASE(cnode_simple_test)
bool fInboundIn = false;
// Test that fFeeler is false by default.
CNode* pnode1 = new CNode(id++, NODE_NETWORK, height, hSocket, addr, pszDest, fInboundIn);
CNode* pnode1 = new CNode(id++, NODE_NETWORK, height, hSocket, addr, 0, pszDest, fInboundIn);
BOOST_CHECK(pnode1->fInbound == false);
BOOST_CHECK(pnode1->fFeeler == false);
fInboundIn = true;
CNode* pnode2 = new CNode(id++, NODE_NETWORK, height, hSocket, addr, pszDest, fInboundIn);
CNode* pnode2 = new CNode(id++, NODE_NETWORK, height, hSocket, addr, 1, pszDest, fInboundIn);
BOOST_CHECK(pnode2->fInbound == true);
BOOST_CHECK(pnode2->fFeeler == false);
}

2
src/test/test_bitcoin.cpp
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@ -72,7 +72,7 @@ TestingSetup::TestingSetup(const std::string& chainName) : BasicTestingSetup(cha
nScriptCheckThreads = 3;
for (int i=0; i < nScriptCheckThreads-1; i++)
threadGroup.create_thread(&ThreadScriptCheck);
g_connman = std::unique_ptr<CConnman>(new CConnman());
g_connman = std::unique_ptr<CConnman>(new CConnman(0x1337, 0x1337)); // Deterministic randomness for tests.
connman = g_connman.get();
RegisterNodeSignals(GetNodeSignals());
}