Close socket:return false
[novacoin.git] / src / net.cpp
index 7255cab..f711696 100644 (file)
 #include "miner.h"
 #include "ntp.h"
 
-#ifdef WIN32
-#include <string.h>
-#endif
-
 using namespace std;
-using namespace boost;
 
 static const int MAX_OUTBOUND_CONNECTIONS = 16;
 
@@ -57,8 +52,8 @@ static CNode* pnodeLocalHost = NULL;
 static CNode* pnodeSync = NULL;
 CAddress addrSeenByPeer(CService("0.0.0.0", nPortZero), nLocalServices);
 uint64_t nLocalHostNonce = 0;
-boost::array<int, THREAD_MAX> vnThreadsRunning;
-static std::vector<SOCKET> vhListenSocket;
+array<int, THREAD_MAX> vnThreadsRunning;
+static vector<SOCKET> vhListenSocket;
 CAddrMan addrman;
 
 vector<CNode*> vNodes;
@@ -74,7 +69,7 @@ CCriticalSection cs_vOneShots;
 set<CNetAddr> setservAddNodeAddresses;
 CCriticalSection cs_setservAddNodeAddresses;
 
-vector<std::string> vAddedNodes;
+vector<string> vAddedNodes;
 CCriticalSection cs_vAddedNodes;
 
 static CSemaphore *semOutbound = NULL;
@@ -85,9 +80,9 @@ void AddOneShot(string strDest)
     vOneShots.push_back(strDest);
 }
 
-unsigned short GetListenPort()
+uint16_t GetListenPort()
 {
-    return (unsigned short)(GetArg("-port", GetDefaultPort()));
+    return static_cast<uint16_t>(GetArg("-port", GetDefaultPort()));
 }
 
 void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
@@ -111,7 +106,7 @@ bool GetLocal(CService& addr, const CNetAddr *paddrPeer)
     int nBestReachability = -1;
     {
         LOCK(cs_mapLocalHost);
-        for (map<CNetAddr, LocalServiceInfo>::iterator it = mapLocalHost.begin(); it != mapLocalHost.end(); it++)
+        for (auto it = mapLocalHost.begin(); it != mapLocalHost.end(); it++)
         {
             int nScore = (*it).second.nScore;
             int nReachability = (*it).first.GetReachabilityFrom(paddrPeer);
@@ -196,11 +191,11 @@ bool RecvLine(SOCKET hSocket, string& strLine)
 void static AdvertizeLocal()
 {
     LOCK(cs_vNodes);
-    BOOST_FOREACH(CNode* pnode, vNodes)
+    for(CNode* pnode :  vNodes)
     {
         if (pnode->fSuccessfullyConnected)
         {
-            CAddress addrLocal = GetLocalAddress(&pnode->addr);
+            auto addrLocal = GetLocalAddress(&pnode->addr);
             if (addrLocal.IsRoutable() && (CService)addrLocal != pnode->addrLocal)
             {
                 pnode->PushAddress(addrLocal);
@@ -218,6 +213,44 @@ void SetReachable(enum Network net, bool fFlag)
         vfReachable[NET_IPV4] = true;
 }
 
+int GetnScore(const CService& addr)
+{
+    LOCK(cs_mapLocalHost);
+    if (mapLocalHost.count(addr) == LOCAL_NONE)
+        return 0;
+    return mapLocalHost[addr].nScore;
+}
+
+
+// Is our peer's addrLocal potentially useful as an external IP source?
+bool IsPeerAddrLocalGood(CNode *pnode)
+{
+    return fDiscover && pnode->addr.IsRoutable() && pnode->addrLocal.IsRoutable() &&
+           !IsLimited(pnode->addrLocal.GetNetwork());
+}
+
+// pushes our own address to a peer
+void AdvertiseLocal(CNode *pnode)
+{
+    if (!fNoListen && pnode->fSuccessfullyConnected)
+    {
+        auto addrLocal = GetLocalAddress(&pnode->addr);
+        // If discovery is enabled, sometimes give our peer the address it
+        // tells us that it sees us as in case it has a better idea of our
+        // address than we do.
+        if (IsPeerAddrLocalGood(pnode) && (!addrLocal.IsRoutable() ||
+             GetRand((GetnScore(addrLocal) > LOCAL_MANUAL) ? 8:2) == 0))
+        {
+            addrLocal.SetIP(pnode->addrLocal);
+        }
+        if (addrLocal.IsRoutable())
+        {
+            printf("AdvertiseLocal: advertising address %s\n", addrLocal.ToString().c_str());
+            pnode->PushAddress(addrLocal);
+        }
+    }
+}
+
 // learn a new local address
 bool AddLocal(const CService& addr, int nScore)
 {
@@ -308,13 +341,15 @@ extern int GetExternalIPbySTUN(uint64_t rnd, struct sockaddr_in *mapped, const c
 // We now get our external IP from the IRC server first and only use this as a backup
 bool GetMyExternalIP(CNetAddr& ipRet)
 {
-    struct sockaddr_in mapped;
-    uint64_t rnd = std::numeric_limits<uint64_t>::max();
+    struct sockaddr_in mapped = {};
+    auto rnd = GetRand(numeric_limits<uint64_t>::max());
     const char *srv;
     int rc = GetExternalIPbySTUN(rnd, &mapped, &srv);
     if(rc >= 0) {
         ipRet = CNetAddr(mapped.sin_addr);
-        printf("GetExternalIPbySTUN(%" PRIu64 ") returned %s in attempt %d; Server=%s\n", rnd, ipRet.ToStringIP().c_str(), rc, srv);
+        if (fDebugNet) {
+            printf("GetExternalIPbySTUN(%" PRIu64 ") returned %s in attempt %d; Server=%s\n", rnd, ipRet.ToStringIP().c_str(), rc, srv);
+        }
         return true;
     }
     return false;
@@ -333,10 +368,6 @@ void ThreadGetMyExternalIP(void* parg)
     }
 }
 
-
-
-
-
 void AddressCurrentlyConnected(const CService& addr)
 {
     addrman.Connected(addr);
@@ -353,16 +384,16 @@ CCriticalSection CNode::cs_totalBytesSent;
 CNode* FindNode(const CNetAddr& ip)
 {
     LOCK(cs_vNodes);
-    BOOST_FOREACH(CNode* pnode, vNodes)
+    for(CNode* pnode :  vNodes)
         if ((CNetAddr)pnode->addr == ip)
             return (pnode);
     return NULL;
 }
 
-CNode* FindNode(std::string addrName)
+CNode* FindNode(string addrName)
 {
     LOCK(cs_vNodes);
-    BOOST_FOREACH(CNode* pnode, vNodes)
+    for(CNode* pnode :  vNodes)
         if (pnode->addrName == addrName)
             return (pnode);
     return NULL;
@@ -371,7 +402,7 @@ CNode* FindNode(std::string addrName)
 CNode* FindNode(const CService& addr)
 {
     LOCK(cs_vNodes);
-    BOOST_FOREACH(CNode* pnode, vNodes)
+    for(CNode* pnode :  vNodes)
         if ((CService)pnode->addr == addr)
             return (pnode);
     return NULL;
@@ -441,6 +472,194 @@ CNode* ConnectNode(CAddress addrConnect, const char *pszDest, int64_t nTimeout)
     }
 }
 
+CNode::CNode(SOCKET hSocketIn, CAddress addrIn, string addrNameIn, bool fInboundIn) : vSend(SER_NETWORK, MIN_PROTO_VERSION), vRecv(SER_NETWORK, MIN_PROTO_VERSION)
+{
+    nServices = 0;
+    hSocket = hSocketIn;
+    nLastSend = 0;
+    nLastRecv = 0;
+    nSendBytes = 0;
+    nRecvBytes = 0;
+    nLastSendEmpty = GetTime();
+    nTimeConnected = GetTime();
+    nHeaderStart = -1;
+    nMessageStart = numeric_limits<uint32_t>::max();
+    addr = addrIn;
+    addrName = addrNameIn.empty() ? addr.ToStringIPPort() : addrNameIn;
+    nVersion = 0;
+    strSubVer.clear();
+    fOneShot = false;
+    fClient = false; // set by version message
+    fInbound = fInboundIn;
+    fNetworkNode = false;
+    fSuccessfullyConnected = false;
+    fDisconnect = false;
+    nRefCount = 0;
+    nReleaseTime = 0;
+    hashContinue = 0;
+    pindexLastGetBlocksBegin = 0;
+    hashLastGetBlocksEnd = 0;
+    nStartingHeight = -1;
+    nNextLocalAddrSend = 0;
+    nNextAddrSend = 0;
+    nNextInvSend = 0;
+    fStartSync = false;
+    fGetAddr = false;
+    nMisbehavior = 0;
+    hashCheckpointKnown = 0;
+    setInventoryKnown.max_size((size_t)SendBufferSize() / 1000);
+
+    // Be shy and don't send version until we hear
+    if (hSocket != INVALID_SOCKET && !fInbound)
+        PushVersion();
+}
+
+CNode::~CNode()
+{
+    if (hSocket != INVALID_SOCKET)
+    {
+        CloseSocket(hSocket);
+    }
+}
+
+int CNode::GetRefCount()
+{
+    return max(nRefCount, 0) + (GetTime() < nReleaseTime ? 1 : 0);
+}
+
+CNode* CNode::AddRef(int64_t nTimeout)
+{
+    if (nTimeout != 0)
+        nReleaseTime = max(nReleaseTime, GetTime() + nTimeout);
+    else
+        nRefCount++;
+    return this;
+}
+
+void CNode::Release()
+{
+    nRefCount--;
+}
+
+void CNode::AddAddressKnown(const CAddress& addr)
+{
+    setAddrKnown.insert(addr);
+}
+
+void CNode::PushAddress(const CAddress& addr)
+{
+    // Known checking here is only to save space from duplicates.
+    // SendMessages will filter it again for knowns that were added
+    // after addresses were pushed.
+    if (addr.IsValid() && !setAddrKnown.count(addr))
+        vAddrToSend.push_back(addr);
+}
+
+void CNode::AddInventoryKnown(const CInv& inv)
+{
+    {
+        LOCK(cs_inventory);
+        setInventoryKnown.insert(inv);
+    }
+}
+
+void CNode::PushInventory(const CInv& inv)
+{
+    {
+        LOCK(cs_inventory);
+        if (!setInventoryKnown.count(inv))
+            vInventoryToSend.push_back(inv);
+    }
+}
+
+void CNode::AskFor(const CInv& inv)
+{
+    // We're using mapAskFor as a priority queue,
+    // the key is the earliest time the request can be sent
+    int64_t& nRequestTime = mapAlreadyAskedFor[inv];
+    if (fDebugNet)
+        printf("askfor %s   %" PRId64 " (%s)\n", inv.ToString().c_str(), nRequestTime, DateTimeStrFormat("%H:%M:%S", nRequestTime/1000000).c_str());
+
+    // Make sure not to reuse time indexes to keep things in the same order
+    int64_t nNow = (GetTime() - 1) * 1000000;
+    static int64_t nLastTime;
+    ++nLastTime;
+    nNow = max(nNow, nLastTime);
+    nLastTime = nNow;
+
+    // Each retry is 2 minutes after the last
+    nRequestTime = max(nRequestTime + 2 * 60 * 1000000, nNow);
+    mapAskFor.insert({ nRequestTime, inv });
+}
+
+void CNode::BeginMessage(const char* pszCommand)
+{
+    ENTER_CRITICAL_SECTION(cs_vSend);
+    if (nHeaderStart != -1)
+        AbortMessage();
+    nHeaderStart = (int32_t)vSend.size();
+    vSend << CMessageHeader(pszCommand, 0);
+    nMessageStart = (uint32_t)vSend.size();
+    if (fDebug)
+        printf("sending: %s ", pszCommand);
+}
+
+void CNode::AbortMessage()
+{
+    if (nHeaderStart < 0)
+        return;
+    vSend.resize(nHeaderStart);
+    nHeaderStart = -1;
+    nMessageStart = numeric_limits<uint32_t>::max();
+    LEAVE_CRITICAL_SECTION(cs_vSend);
+
+    if (fDebug)
+        printf("(aborted)\n");
+}
+
+void CNode::EndMessage()
+{
+    if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
+    {
+        printf("dropmessages DROPPING SEND MESSAGE\n");
+        AbortMessage();
+        return;
+    }
+
+    if (nHeaderStart < 0)
+        return;
+
+    // Set the size
+    uint32_t nSize = (uint32_t) vSend.size() - nMessageStart;
+    memcpy((char*)&vSend[nHeaderStart] + CMessageHeader::MESSAGE_SIZE_OFFSET, &nSize, sizeof(nSize));
+
+    // Set the checksum
+    auto hash = Hash(vSend.begin() + nMessageStart, vSend.end());
+    uint32_t nChecksum = 0;
+    memcpy(&nChecksum, &hash, sizeof(nChecksum));
+    assert(nMessageStart - nHeaderStart >= CMessageHeader::CHECKSUM_OFFSET + sizeof(nChecksum));
+    memcpy((char*)&vSend[nHeaderStart] + CMessageHeader::CHECKSUM_OFFSET, &nChecksum, sizeof(nChecksum));
+
+    if (fDebug) {
+        printf("(%d bytes)\n", nSize);
+    }
+
+    nHeaderStart = -1;
+    nMessageStart = numeric_limits<uint32_t>::max();
+    LEAVE_CRITICAL_SECTION(cs_vSend);
+}
+
+void CNode::EndMessageAbortIfEmpty()
+{
+    if (nHeaderStart < 0)
+        return;
+    int nSize = (int) vSend.size() - nMessageStart;
+    if (nSize > 0)
+        EndMessage();
+    else
+        AbortMessage();
+}
+
 void CNode::CloseSocketDisconnect()
 {
     fDisconnect = true;
@@ -468,7 +687,7 @@ void CNode::Cleanup()
 
 void CNode::PushVersion()
 {
-    int64_t nTime = GetAdjustedTime();
+    auto nTime = GetAdjustedTime();
     CAddress addrYou, addrMe;
 
     bool fHidden = false;
@@ -493,14 +712,14 @@ void CNode::PushVersion()
     RAND_bytes((unsigned char*)&nLocalHostNonce, sizeof(nLocalHostNonce));
     printf("send version message: version %d, blocks=%d, us=%s, them=%s, peer=%s\n", PROTOCOL_VERSION, nBestHeight, addrMe.ToString().c_str(), addrYou.ToString().c_str(), addr.ToString().c_str());
     PushMessage("version", PROTOCOL_VERSION, nLocalServices, nTime, addrYou, addrMe,
-                nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, std::vector<string>()), nBestHeight);
+                nLocalHostNonce, FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, vector<string>()), nBestHeight);
 }
 
 
 
 
 
-std::map<CNetAddr, int64_t> CNode::setBanned;
+map<CNetAddr, int64_t> CNode::setBanned;
 CCriticalSection CNode::cs_setBanned;
 
 void CNode::ClearBanned()
@@ -513,10 +732,10 @@ bool CNode::IsBanned(CNetAddr ip)
     bool fResult = false;
     {
         LOCK(cs_setBanned);
-        std::map<CNetAddr, int64_t>::iterator i = setBanned.find(ip);
+        auto i = setBanned.find(ip);
         if (i != setBanned.end())
         {
-            int64_t t = (*i).second;
+            auto t = (*i).second;
             if (GetTime() < t)
                 fResult = true;
         }
@@ -535,7 +754,7 @@ bool CNode::Misbehaving(int howmuch)
     nMisbehavior += howmuch;
     if (nMisbehavior >= GetArgInt("-banscore", 100))
     {
-        int64_t banTime = GetTime()+GetArg("-bantime", nOneDay);  // Default 24-hour ban
+        auto banTime = GetTime()+GetArg("-bantime", nOneDay);  // Default 24-hour ban
         printf("Misbehaving: %s (%d -> %d) DISCONNECTING\n", addr.ToString().c_str(), nMisbehavior-howmuch, nMisbehavior);
         {
             LOCK(cs_setBanned);
@@ -589,7 +808,7 @@ void ThreadSocketHandler(void* parg)
         ThreadSocketHandler2(parg);
         vnThreadsRunning[THREAD_SOCKETHANDLER]--;
     }
-    catch (std::exception& e) {
+    catch (exception& e) {
         vnThreadsRunning[THREAD_SOCKETHANDLER]--;
         PrintException(&e, "ThreadSocketHandler()");
     } catch (...) {
@@ -614,7 +833,7 @@ void ThreadSocketHandler2(void* parg)
             LOCK(cs_vNodes);
             // Disconnect unused nodes
             vector<CNode*> vNodesCopy = vNodes;
-            BOOST_FOREACH(CNode* pnode, vNodesCopy)
+            for(CNode* pnode :  vNodesCopy)
             {
                 if (pnode->fDisconnect ||
                     (pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
@@ -639,7 +858,7 @@ void ThreadSocketHandler2(void* parg)
 
             // Delete disconnected nodes
             list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
-            BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
+            for(CNode* pnode :  vNodesDisconnectedCopy)
             {
                 // wait until threads are done using it
                 if (pnode->GetRefCount() <= 0)
@@ -693,14 +912,14 @@ void ThreadSocketHandler2(void* parg)
         SOCKET hSocketMax = 0;
         bool have_fds = false;
 
-        BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket) {
+        for(SOCKET hListenSocket :  vhListenSocket) {
             FD_SET(hListenSocket, &fdsetRecv);
             hSocketMax = max(hSocketMax, hListenSocket);
             have_fds = true;
         }
         {
             LOCK(cs_vNodes);
-            BOOST_FOREACH(CNode* pnode, vNodes)
+            for(CNode* pnode :  vNodes)
             {
                 if (pnode->hSocket == INVALID_SOCKET)
                     continue;
@@ -740,7 +959,7 @@ void ThreadSocketHandler2(void* parg)
         //
         // Accept new connections
         //
-        BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket)
+        for(SOCKET hListenSocket :  vhListenSocket)
         if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
         {
 #ifdef USE_IPV6
@@ -759,7 +978,7 @@ void ThreadSocketHandler2(void* parg)
 
             {
                 LOCK(cs_vNodes);
-                BOOST_FOREACH(CNode* pnode, vNodes)
+                for(CNode* pnode :  vNodes)
                     if (pnode->fInbound)
                         nInbound++;
             }
@@ -803,10 +1022,10 @@ void ThreadSocketHandler2(void* parg)
         {
             LOCK(cs_vNodes);
             vNodesCopy = vNodes;
-            BOOST_FOREACH(CNode* pnode, vNodesCopy)
+            for(CNode* pnode :  vNodesCopy)
                 pnode->AddRef();
         }
-        BOOST_FOREACH(CNode* pnode, vNodesCopy)
+        for(CNode* pnode :  vNodesCopy)
         {
             if (fShutdown)
                 return;
@@ -931,17 +1150,6 @@ void ThreadSocketHandler2(void* parg)
     }
 }
 
-// DNS seeds
-// Each pair gives a source name and a seed name.
-// The first name is used as information source for addrman.
-// The second name should resolve to a list of seed addresses.
-static const char *strDNSSeed[][2] = {
-    {"novacoin.karelia.pro", "dnsseed.novacoin.karelia.pro"},
-    {"novacoin.ru", "dnsseed.novacoin.ru"},
-    {"novacoin.ru", "testseed.novacoin.ru"},
-    {"novaco.in", "dnsseed.novaco.in"},
-};
-
 void ThreadDNSAddressSeed(void* parg)
 {
     // Make this thread recognisable as the DNS seeding thread
@@ -953,7 +1161,7 @@ void ThreadDNSAddressSeed(void* parg)
         ThreadDNSAddressSeed2(parg);
         vnThreadsRunning[THREAD_DNSSEED]--;
     }
-    catch (std::exception& e) {
+    catch (exception& e) {
         vnThreadsRunning[THREAD_DNSSEED]--;
         PrintException(&e, "ThreadDNSAddressSeed()");
     } catch (...) {
@@ -970,25 +1178,35 @@ void ThreadDNSAddressSeed2(void* parg)
 
     if (!fTestNet)
     {
+        // DNS seeds
+        // Each pair gives a source name and a seed name.
+        // The first name is used as information source for addrman.
+        // The second name should resolve to a list of seed addresses.
+        static const vector<pair <string, string> > vstrDNSSeed = {
+            { "node.novacoin.karelia.pro", "dnsseed.novacoin.karelia.pro" },
+            { "novacoin.ru", "dnsseed.novacoin.ru" },
+            { "novacoin.ru", "testseed.novacoin.ru" },
+            { "novaco.in", "dnsseed.novaco.in" },
+        };
         printf("Loading addresses from DNS seeds (could take a while)\n");
 
-        for (unsigned int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
+        for (unsigned int seed_idx = 0; seed_idx < vstrDNSSeed.size(); seed_idx++) {
             if (HaveNameProxy()) {
-                AddOneShot(strDNSSeed[seed_idx][1]);
+                AddOneShot(vstrDNSSeed[seed_idx].second);
             } else {
                 vector<CNetAddr> vaddr;
                 vector<CAddress> vAdd;
-                if (LookupHost(strDNSSeed[seed_idx][1], vaddr))
+                if (LookupHost(vstrDNSSeed[seed_idx].second, vaddr))
                 {
-                    BOOST_FOREACH(CNetAddr& ip, vaddr)
+                    for(CNetAddr& ip :  vaddr)
                     {
-                        CAddress addr = CAddress(CService(ip, GetDefaultPort()));
+                        auto addr = CAddress(CService(ip, GetDefaultPort()));
                         addr.nTime = GetTime() - 3*nOneDay - GetRand(4*nOneDay); // use a random age between 3 and 7 days old
                         vAdd.push_back(addr);
                         found++;
                     }
                 }
-                addrman.Add(vAdd, CNetAddr(strDNSSeed[seed_idx][0], true));
+                addrman.Add(vAdd, CNetAddr(vstrDNSSeed[seed_idx].first, true));
             }
         }
     }
@@ -996,58 +1214,9 @@ void ThreadDNSAddressSeed2(void* parg)
     printf("%d addresses found from DNS seeds\n", found);
 }
 
-
-
-
-
-
-
-
-
-
-
-
-uint32_t pnSeed[] =
-{
-    0xa52bf0da, 0x30aa43d8, 0x614488d5, 0x517b6fd5, 0xd4bf62d4, 0xb7d638d4, 0xbc12bcd1, 0xa2501bc6,
-    0xfde617c6, 0x3337b1c6, 0x1dcd71c3, 0x2c1544c1, 0xe05f6ac1, 0x852f63c0, 0x3e2363c0, 0x15f563c0,
-    0x430d63c0, 0x50d6a9c0, 0xf0a679c0, 0xefdeedbf, 0x7aaee8bc, 0x3a3dbbbc, 0xef218abc, 0x0bef78bc,
-    0x8baa3eb2, 0x2bf913b2, 0x24ed9fb2, 0xb42289b2, 0x718a09b0, 0xe9433eb0, 0x559425b0, 0xc97e1fb0,
-    0x18e1d4b0, 0x8f6cc1b0, 0xac3838ae, 0x86c0ffad, 0x6b0272a7, 0xa463f8a2, 0x6f17f3a2, 0xb3d6f3a2,
-    0x9cd8f997, 0xd513fb94, 0x39e64880, 0x3859dd6f, 0x0b08fe6d, 0xe601fe6d, 0xeb44a26d, 0xfe53186c,
-    0x203c2e68, 0x1c542868, 0x0caa8368, 0xb8748368, 0xccca4762, 0xc637555f, 0x638a545f, 0x59b2205f,
-    0x52568c5f, 0xba568c5f, 0x8a568c5f, 0x31b0f45e, 0x54a0f45e, 0x37d6f15e, 0xc520175e, 0x7620175e,
-    0xc310175e, 0x8e33b45e, 0x7abb5f5d, 0xd3014c5d, 0xa1e1485d, 0x9947645d, 0xfab8ff5c, 0xa979e65b,
-    0xa879e65b, 0x9f79e65b, 0x9fa3d25b, 0x112a925b, 0x7b92905b, 0x60647a5b, 0x1e389d5a, 0x851afa59,
-    0x0185ef59, 0x26549b59, 0x1c9efe57, 0xc54c1256, 0x1ad51955, 0x19d21955, 0x73c41955, 0x3f74ee55,
-    0x633eea55, 0x6883d655, 0xfb72c655, 0x5360a653, 0x17c1ea52, 0xc661c852, 0x1ecdc852, 0x006a9752,
-    0xf72d9252, 0x82650551, 0x36f1c851, 0x33f1c851, 0xd5c1864f, 0xb6bf1b4e, 0x96da184e, 0x40d0234d,
-    0x9a96ab4c, 0x8fc2a84c, 0xb5dbd048, 0xf4644447, 0x2d51af47, 0xa9625445, 0x83f05243, 0x89672941,
-    0x3a8bad3e, 0xf0a05436, 0x6ab7c936, 0x49971d32, 0xadd4482e, 0xcffd212e, 0x6730bc2e, 0x839aa12e,
-    0x68d9692e, 0xc7183b25, 0x6c47bb25, 0x2490bb25, 0xad651c1f, 0x048a861f, 0x6937811f, 0x064b2d05,
-    0x4d226805,
-};
-
-const char* pchTorSeed[] = 
-{
-    "seedp4knqnoei57u.onion",
-    "seedr3hhlepyi7fd.onion",
-    "seed3uuomkclbiz4.onion",
-    "seedeh7qck3ouff5.onion",
-    "5rg3vq4jagckeckf.onion",
-    "seedt3sraf53ajiy.onion",
-    "seedg4qyccsg42oq.onion",
-    "novaqrtoywpg7jly.onion",
-    "seed3d5wolqbgrcb.onion",
-    "seed24u5dwph3qw4.onion",
-    "mj26ulzbs2oskgym.onion",
-    "eqon4usunavt76m7.onion",
-    "seedd3aldwpslzl3.onion"
-};
-
 void DumpAddresses()
 {
-    int64_t nStart = GetTimeMillis();
+    auto nStart = GetTimeMillis();
 
     CAddrDB adb;
     adb.Write(addrman);
@@ -1080,7 +1249,7 @@ void ThreadDumpAddress(void* parg)
     {
         ThreadDumpAddress2(parg);
     }
-    catch (std::exception& e) {
+    catch (exception& e) {
         PrintException(&e, "ThreadDumpAddress()");
     }
     printf("ThreadDumpAddress exited\n");
@@ -1097,7 +1266,7 @@ void ThreadOpenConnections(void* parg)
         ThreadOpenConnections2(parg);
         vnThreadsRunning[THREAD_OPENCONNECTIONS]--;
     }
-    catch (std::exception& e) {
+    catch (exception& e) {
         vnThreadsRunning[THREAD_OPENCONNECTIONS]--;
         PrintException(&e, "ThreadOpenConnections()");
     } catch (...) {
@@ -1135,7 +1304,7 @@ void ThreadOpenConnections2(void* parg)
         for (int64_t nLoop = 0;; nLoop++)
         {
             ProcessOneShot();
-            BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
+            for(string strAddr :  mapMultiArgs["-connect"])
             {
                 CAddress addr;
                 OpenNetworkConnection(addr, NULL, strAddr.c_str());
@@ -1151,7 +1320,7 @@ void ThreadOpenConnections2(void* parg)
     }
 
     // Initiate network connections
-    int64_t nStart = GetTime();
+    auto nStart = GetTime();
     for ( ; ; )
     {
         ProcessOneShot();
@@ -1172,15 +1341,44 @@ void ThreadOpenConnections2(void* parg)
         // Add seed nodes if IRC isn't working
         if (!IsLimited(NET_IPV4) && addrman.size()==0 && (GetTime() - nStart > 60) && !fTestNet)
         {
-            std::vector<CAddress> vAdd;
-            for (unsigned int i = 0; i < ARRAYLEN(pnSeed); i++)
+            vector<uint32_t> vnSeed =
+            {
+                0x1c542868, 0x3859dd6f, 0x203c2e68, 0xf145a6bc, 0x638a545f, 0x325da346, 0x385da346, 0xfb2b8d5f,
+                0x52568c5f, 0xa979e65b, 0x8de6485d, 0x9f79e65b, 0x048a861f, 0x3388b55f, 0x6ff0b45e, 0x17e81f5f,
+                0x6c47bb25, 0x1ecdc852, 0x28263db9, 0x47824e5d, 0x36f1c851, 0x2bf913b2, 0x95923cb3, 0x84e63eb2,
+                0xefdeedbf, 0x65200092, 0xf36f6805, 0x42692d05, 0x772c1955, 0xb6bf1b4e, 0x7abb5f5d, 0xdb2fa6bc,
+                0x90e911bf, 0x82de565f, 0x694416b2, 0x0ab600bc, 0xfcecbe6d, 0x24ed9fb2, 0x1bb618c2, 0xc64765bb,
+                0x4e3d62c3, 0xdba24baa, 0x4b7109b0, 0x12a12cc2, 0xfc01864f, 0x0b69e85b, 0x33922c1f, 0xac611bc6,
+                0x2a257155, 0x991d5fc0, 0xbfdabcb1, 0x9b73ee55, 0x5bc2b95d, 0xdef0762e, 0x6ab7c936, 0x9c4416b2,
+                0xd60d864f, 0x03671f1f, 0x3b5da346, 0xc6f5c851, 0x5411b2d4, 0xe7c25702, 0x63474fb0, 0x7e11c854,
+                0x52381d5f, 0x72fdfe59, 0x51599a05, 0xfb12b2d4, 0xaee4f15e, 0xd0e3f15e, 0x2aa2805f, 0xa1caf15e,
+                0x34fe425e, 0x46e1f15e, 0xd7c71955, 0xaeeff15e, 0x47c2af55, 0x563d89b2, 0x67980fd9, 0xc9def15e,
+                0x9cc51eb9, 0xdaa7aa6b, 0x78e6871f, 0x0d5d2cb2, 0x7aedf15e, 0x9bcaf15e, 0xe5f7f15e, 0x501c1759,
+                0xdfbc4980, 0xa7397f2e, 0x31ea1a02, 0x3a27655e, 0xaa86f05c, 0xdcddf15e, 0x64689cb2, 0xd4bf62d4,
+                0xf093eab2, 0x98def15e, 0xb6c5f15e, 0x81e8f15e, 0xe5d2fe59, 0xa312786d, 0x4cf9fe59, 0x8a922c1f,
+                0x00c7fe59, 0x1ade565f, 0x9e4116b2, 0x2c36983e, 0x68f8f15e, 0x51b7eab2, 0x76c51eb9, 0x9edd4980,
+                0x90ef565f, 0x0dd80857, 0xd513fb94, 0xf5bdeab2, 0xa95277b0, 0x2cf2f15e, 0x1897eab2, 0x924416b2,
+                0x985c9b59, 0x30aa43d8, 0xf9c6745f, 0xaf862e5f, 0xe0ceeab2, 0xb9b3eab2, 0x6da4eab2, 0xa4fdeab2,
+                0x0fa6c125, 0xe38bbd05, 0x5d922c1f, 0x9bd0eab2, 0x73025e02, 0xc4fd794d, 0x8435b35f, 0x2d01bc2e,
+                0xaa2a14d4, 0xa22b07cb, 0xebda6f4f, 0xddc6514e, 0xf23feab2, 0xea1e5256, 0x6147b45e, 0x47d21e4f,
+                0x67c41c1f, 0x53ec1a02, 0x352e786d, 0x6bec1a02, 0x78fb4abe, 0xd3014c5d, 0x9fbbeab2, 0x1fc51eb9,
+                0x720eeab2, 0x2db5eab2, 0xe8baf65c, 0x521b459e, 0x65c4955f, 0x0e7b915f, 0xa8f37e6d, 0x6d0b465f,
+                0xfab8ff5c, 0xf7c27e6d, 0x7345a846, 0x4fd1a7d5, 0xdfc97e6d, 0x26c27e6d, 0xa9de36b2, 0xc615344d,
+                0x28ceb95d, 0xa52d895e, 0x18c17e6d, 0x13ec1a02, 0x0ba37125, 0x6c3d344d, 0xb3922c1f, 0x506bbeb0,
+                0x4d04994e, 0xa1bbe56d, 0xf62c344d, 0x0847d048, 0x4bdc6451, 0xc95b9a05, 0xbcd3a7d5, 0x29b57125,
+                0x0c4d2cb2, 0xf2b8eab2, 0xc2d5b95d, 0x0185ef59, 0x30adeab2, 0xcaf0e92e, 0x756c344d, 0xfd9e252e,
+                0xbe5ef3bc, 0x4689344d, 0xb223895e, 0xfcebeaad, 0xb7c0e92e, 0x993c1760, 0xe1e171b0, 0xb857e75b,
+                0xbf10002e, 0xb55b2cb2, 0xa90e2cb2, 0x13d6f15e, 0xf8be9225, 0x14ddf15e, 0x06e90305, 0x82472cb2,
+            };
+            vector<CAddress> vAdd;
+            for (unsigned int i = 0; i < vnSeed.size(); i++)
             {
                 // It'll only connect to one or two seed nodes because once it connects,
                 // it'll get a pile of addresses with newer timestamps.
                 // Seed nodes are given a random 'last seen time' of between one and two
                 // weeks ago.
                 struct in_addr ip;
-                memcpy(&ip, &pnSeed[i], sizeof(ip));
+                memcpy(&ip, &vnSeed[i], sizeof(ip));
                 CAddress addr(CService(ip, GetDefaultPort()));
                 addr.nTime = GetTime()-GetRand(nOneWeek)-nOneWeek;
                 vAdd.push_back(addr);
@@ -1191,10 +1389,26 @@ void ThreadOpenConnections2(void* parg)
         // Add Tor nodes if we have connection with onion router
         if (mapArgs.count("-tor"))
         {
-            std::vector<CAddress> vAdd;
-            for (unsigned int i = 0; i < ARRAYLEN(pchTorSeed); i++)
+            const vector<string> vstrTorSeed =
+            {
+                "seedp4knqnoei57u.onion",
+                "seedr3hhlepyi7fd.onion",
+                "seed3uuomkclbiz4.onion",
+                "seedeh7qck3ouff5.onion",
+                "5rg3vq4jagckeckf.onion",
+                "seedt3sraf53ajiy.onion",
+                "seedg4qyccsg42oq.onion",
+                "novaqrtoywpg7jly.onion",
+                "seed3d5wolqbgrcb.onion",
+                "seed24u5dwph3qw4.onion",
+                "mj26ulzbs2oskgym.onion",
+                "eqon4usunavt76m7.onion",
+                "seedd3aldwpslzl3.onion"
+            };
+            vector<CAddress> vAdd;
+            for (unsigned int i = 0; i < vstrTorSeed.size(); i++)
             {
-                CAddress addr(CService(pchTorSeed[i], GetDefaultPort()));
+                CAddress addr(CService(vstrTorSeed[i], GetDefaultPort()));
                 addr.nTime = GetTime()-GetRand(nOneWeek)-nOneWeek;
                 vAdd.push_back(addr);
             }
@@ -1212,7 +1426,7 @@ void ThreadOpenConnections2(void* parg)
         set<vector<unsigned char> > setConnected;
         {
             LOCK(cs_vNodes);
-            BOOST_FOREACH(CNode* pnode, vNodes) {
+            for(CNode* pnode :  vNodes) {
                 if (!pnode->fInbound) {
                     setConnected.insert(pnode->addr.GetGroup());
                     nOutbound++;
@@ -1220,13 +1434,13 @@ void ThreadOpenConnections2(void* parg)
             }
         }
 
-        int64_t nANow = GetAdjustedTime();
+        auto nANow = GetAdjustedTime();
 
         int nTries = 0;
         for ( ; ; )
         {
             // use an nUnkBias between 10 (no outgoing connections) and 90 (8 outgoing connections)
-            CAddress addr = addrman.Select(10 + min(nOutbound,8)*10);
+            auto addr = addrman.Select(10 + min(nOutbound,8)*10);
 
             // if we selected an invalid address, restart
             if (!addr.IsValid() || setConnected.count(addr.GetGroup()) || IsLocal(addr))
@@ -1270,7 +1484,7 @@ void ThreadOpenAddedConnections(void* parg)
         ThreadOpenAddedConnections2(parg);
         vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--;
     }
-    catch (std::exception& e) {
+    catch (exception& e) {
         vnThreadsRunning[THREAD_ADDEDCONNECTIONS]--;
         PrintException(&e, "ThreadOpenAddedConnections()");
     } catch (...) {
@@ -1294,10 +1508,10 @@ void ThreadOpenAddedConnections2(void* parg)
             list<string> lAddresses(0);
             {
                 LOCK(cs_vAddedNodes);
-                BOOST_FOREACH(string& strAddNode, vAddedNodes)
+                for(string& strAddNode :  vAddedNodes)
                     lAddresses.push_back(strAddNode);
             }
-            BOOST_FOREACH(string& strAddNode, lAddresses) {
+            for(string& strAddNode :  lAddresses) {
                 CAddress addr;
                 CSemaphoreGrant grant(*semOutbound);
                 OpenNetworkConnection(addr, &grant, strAddNode.c_str());
@@ -1315,12 +1529,12 @@ void ThreadOpenAddedConnections2(void* parg)
         list<string> lAddresses(0);
         {
             LOCK(cs_vAddedNodes);
-            BOOST_FOREACH(string& strAddNode, vAddedNodes)
+            for(string& strAddNode :  vAddedNodes)
                 lAddresses.push_back(strAddNode);
         }
 
         list<vector<CService> > lservAddressesToAdd(0);
-        BOOST_FOREACH(string& strAddNode, lAddresses)
+        for(string& strAddNode :  lAddresses)
         {
             vector<CService> vservNode(0);
             if (Lookup(strAddNode.c_str(), vservNode, GetDefaultPort(), fNameLookup, 0))
@@ -1328,7 +1542,7 @@ void ThreadOpenAddedConnections2(void* parg)
                 lservAddressesToAdd.push_back(vservNode);
                 {
                     LOCK(cs_setservAddNodeAddresses);
-                    BOOST_FOREACH(CService& serv, vservNode)
+                    for(CService& serv :  vservNode)
                         setservAddNodeAddresses.insert(serv);
                 }
             }
@@ -1337,10 +1551,10 @@ void ThreadOpenAddedConnections2(void* parg)
         // (keeping in mind that addnode entries can have many IPs if fNameLookup)
         {
             LOCK(cs_vNodes);
-            BOOST_FOREACH(CNode* pnode, vNodes)
-                for (list<vector<CService> >::iterator it = lservAddressesToAdd.begin(); it != lservAddressesToAdd.end(); it++)
+            for(CNode* pnode :  vNodes)
+                for (auto it = lservAddressesToAdd.begin(); it != lservAddressesToAdd.end(); it++)
                 {
-                    BOOST_FOREACH(CService& addrNode, *(it))
+                    for(CService& addrNode :  *(it))
                         if (pnode->addr == addrNode)
                         {
                             it = lservAddressesToAdd.erase(it);
@@ -1352,7 +1566,7 @@ void ThreadOpenAddedConnections2(void* parg)
                         break;
                 }
         }
-        BOOST_FOREACH(vector<CService>& vserv, lservAddressesToAdd)
+        for(vector<CService>& vserv :  lservAddressesToAdd)
         {
             if (vserv.size() == 0)
                 continue;
@@ -1415,7 +1629,7 @@ void static StartSync(const vector<CNode*> &vNodes) {
     int64_t nBestScore = 0;
 
     // Iterate over all nodes
-    BOOST_FOREACH(CNode* pnode, vNodes) {
+    for(CNode* pnode :  vNodes) {
         // check preconditions for allowing a sync
         if (!pnode->fClient && !pnode->fOneShot &&
             !pnode->fDisconnect && pnode->fSuccessfullyConnected &&
@@ -1447,7 +1661,7 @@ void ThreadMessageHandler(void* parg)
         ThreadMessageHandler2(parg);
         vnThreadsRunning[THREAD_MESSAGEHANDLER]--;
     }
-    catch (std::exception& e) {
+    catch (exception& e) {
         vnThreadsRunning[THREAD_MESSAGEHANDLER]--;
         PrintException(&e, "ThreadMessageHandler()");
     } catch (...) {
@@ -1468,7 +1682,7 @@ void ThreadMessageHandler2(void* parg)
         {
             LOCK(cs_vNodes);
             vNodesCopy = vNodes;
-            BOOST_FOREACH(CNode* pnode, vNodesCopy) {
+            for(CNode* pnode :  vNodesCopy) {
                 pnode->AddRef();
                 if (pnode == pnodeSync)
                     fHaveSyncNode = true;
@@ -1479,10 +1693,7 @@ void ThreadMessageHandler2(void* parg)
             StartSync(vNodesCopy);
 
         // Poll the connected nodes for messages
-        CNode* pnodeTrickle = NULL;
-        if (!vNodesCopy.empty())
-            pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
-        BOOST_FOREACH(CNode* pnode, vNodesCopy)
+        for(CNode* pnode :  vNodesCopy)
         {
             // Receive messages
             {
@@ -1497,7 +1708,7 @@ void ThreadMessageHandler2(void* parg)
             {
                 TRY_LOCK(pnode->cs_vSend, lockSend);
                 if (lockSend)
-                    SendMessages(pnode, pnode == pnodeTrickle);
+                    SendMessages(pnode);
             }
             if (fShutdown)
                 return;
@@ -1556,11 +1767,19 @@ bool BindListenPort(const CService &addrBind, string& strError)
 #ifndef WIN32
 #ifdef SO_NOSIGPIPE
     // Different way of disabling SIGPIPE on BSD
-    setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
+    if (setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int)) == SOCKET_ERROR)
+    {
+        printf("WARNING: setsockopt failed\n");
+        //TODO: work around problem - may be add CloseSocket and return false?
+    }
 #endif
     // Allow binding if the port is still in TIME_WAIT state after
     // the program was closed and restarted. Not an issue on windows!
-    setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
+    if (setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int)) == SOCKET_ERROR)
+    {
+        printf("WARNING: setsockopt failed\n");
+        //TODO: work around problem - may be add CloseSocket and return false?
+    }
 #endif
 
 #ifdef WIN32
@@ -1572,6 +1791,7 @@ bool BindListenPort(const CService &addrBind, string& strError)
     {
         strError = strprintf("Error: Couldn't set properties on socket for incoming connections (error %d)", WSAGetLastError());
         printf("%s\n", strError.c_str());
+        CloseSocket(hSocket);
         return false;
     }
 
@@ -1581,14 +1801,26 @@ bool BindListenPort(const CService &addrBind, string& strError)
     if (addrBind.IsIPv6()) {
 #ifdef IPV6_V6ONLY
 #ifdef WIN32
-        setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&nOne, sizeof(int));
+    if (setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&nOne, sizeof(int)) == SOCKET_ERROR)
+    {
+        printf("WARNING: setsockopt failed\n");
+        //TODO: work around problem - may be add CloseSocket and return false?
+    }
 #else
-        setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&nOne, sizeof(int));
+    if (setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&nOne, sizeof(int)) == SOCKET_ERROR)
+    {
+        printf("WARNING: setsockopt failed\n");
+        //TODO: work around problem - may be add CloseSocket and return false?
+    }
 #endif
 #endif
 #ifdef WIN32
-        int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED;
-        setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int));
+    int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED;
+    if (setsockopt(hListenSocket, IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int)) == SOCKET_ERROR)
+    {
+        printf("WARNING: setsockopt failed\n");
+        //TODO: work around problem - may be add CloseSocket and return false?
+    }
 #endif
     }
 #endif
@@ -1636,7 +1868,7 @@ void static Discover()
         vector<CNetAddr> vaddr;
         if (LookupHost(pszHostName, vaddr))
         {
-            BOOST_FOREACH (const CNetAddr &addr, vaddr)
+            for(const auto &addr : vaddr)
             {
                 AddLocal(addr, LOCAL_IF);
             }
@@ -1749,7 +1981,7 @@ bool StopNode()
     printf("StopNode()\n");
     fShutdown = true;
     nTransactionsUpdated++;
-    int64_t nStart = GetTime();
+    auto nStart = GetTime();
     {
         LOCK(cs_main);
         ThreadScriptCheckQuit();
@@ -1795,18 +2027,18 @@ public:
     ~CNetCleanup()
     {
         // Close sockets
-        BOOST_FOREACH(CNode* pnode, vNodes)
+        for(CNode* pnode :  vNodes)
             if (pnode->hSocket != INVALID_SOCKET)
                 CloseSocket(pnode->hSocket);
-        BOOST_FOREACH(SOCKET hListenSocket, vhListenSocket)
+        for(SOCKET hListenSocket :  vhListenSocket)
             if (hListenSocket != INVALID_SOCKET)
                 if (!CloseSocket(hListenSocket))
                     printf("CloseSocket(hListenSocket) failed with error %d\n", WSAGetLastError());
 
         // clean up some globals (to help leak detection)
-        BOOST_FOREACH(CNode *pnode, vNodes)
+        for(CNode *pnode :  vNodes)
             delete pnode;
-        BOOST_FOREACH(CNode *pnode, vNodesDisconnected)
+        for(CNode *pnode :  vNodesDisconnected)
             delete pnode;
         vNodes.clear();
         vNodesDisconnected.clear();
@@ -1823,6 +2055,16 @@ public:
 }
 instance_of_cnetcleanup;
 
+inline void RelayInventory(const CInv& inv)
+{
+    // Put on lists to offer to the other nodes
+    {
+        LOCK(cs_vNodes);
+        for(CNode* pnode :  vNodes)
+            pnode->PushInventory(inv);
+    }
+}
+
 void RelayTransaction(const CTransaction& tx, const uint256& hash)
 {
     CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
@@ -1844,8 +2086,8 @@ void RelayTransaction(const CTransaction& tx, const uint256& hash, const CDataSt
         }
 
         // Save original serialized message so newer versions are preserved
-        mapRelay.insert(std::make_pair(inv, ss));
-        vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, inv));
+        mapRelay.insert({inv, ss});
+        vRelayExpiration.push_back({GetTime() + 15 * 60, inv});
     }
 
     RelayInventory(inv);
@@ -1874,3 +2116,6 @@ uint64_t CNode::GetTotalBytesSent()
     LOCK(cs_totalBytesSent);
     return nTotalBytesSent;
 }
+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);
+}