raw
genesis                 1 // Copyright (c) 2009-2010 Satoshi Nakamoto
genesis                 2 // Copyright (c) 2009-2012 The Bitcoin developers
genesis                 3 // Distributed under the MIT/X11 software license, see the accompanying
genesis                 4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
genesis                 5 
genesis                 6 #include "headers.h"
genesis                 7 #include "db.h"
genesis                 8 #include "net.h"
genesis                 9 #include "init.h"
genesis                10 #include "strlcpy.h"
genesis                11 
genesis                12 
genesis                13 using namespace std;
genesis                14 using namespace boost;
genesis                15 
genesis                16 static const int MAX_OUTBOUND_CONNECTIONS = 8;
genesis                17 
genesis                18 void ThreadMessageHandler2(void* parg);
genesis                19 void ThreadSocketHandler2(void* parg);
genesis                20 void ThreadOpenConnections2(void* parg);
genesis                21 bool OpenNetworkConnection(const CAddress& addrConnect);
genesis                22 
genesis                23 
genesis                24 
genesis                25 
genesis                26 
genesis                27 //
genesis                28 // Global state variables
genesis                29 //
genesis                30 bool fClient = false;
genesis                31 uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
asciilifeform_dns...   32 CAddress addrLocalHost("0.0.0.0", 0, nLocalServices);
genesis                33 static CNode* pnodeLocalHost = NULL;
genesis                34 uint64 nLocalHostNonce = 0;
genesis                35 array<int, 10> vnThreadsRunning;
genesis                36 static SOCKET hListenSocket = INVALID_SOCKET;
genesis                37 
genesis                38 vector<CNode*> vNodes;
genesis                39 CCriticalSection cs_vNodes;
genesis                40 map<vector<unsigned char>, CAddress> mapAddresses;
genesis                41 CCriticalSection cs_mapAddresses;
genesis                42 map<CInv, CDataStream> mapRelay;
genesis                43 deque<pair<int64, CInv> > vRelayExpiration;
genesis                44 CCriticalSection cs_mapRelay;
genesis                45 map<CInv, int64> mapAlreadyAskedFor;
genesis                46 
genesis                47 // Settings
genesis                48 int fUseProxy = false;
genesis                49 int nConnectTimeout = 5000;
genesis                50 CAddress addrProxy("127.0.0.1",9050);
genesis                51 
genesis                52 
genesis                53 
genesis                54 
genesis                55 unsigned short GetListenPort()
genesis                56 {
genesis                57     return (unsigned short)(GetArg("-port", GetDefaultPort()));
genesis                58 }
genesis                59 
genesis                60 void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
genesis                61 {
genesis                62     // Filter out duplicate requests
genesis                63     if (pindexBegin == pindexLastGetBlocksBegin && hashEnd == hashLastGetBlocksEnd)
genesis                64         return;
genesis                65     pindexLastGetBlocksBegin = pindexBegin;
genesis                66     hashLastGetBlocksEnd = hashEnd;
genesis                67 
genesis                68     PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd);
genesis                69 }
genesis                70 
genesis                71 
genesis                72 
genesis                73 
genesis                74 
genesis                75 bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout)
genesis                76 {
genesis                77     hSocketRet = INVALID_SOCKET;
genesis                78 
genesis                79     SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
genesis                80     if (hSocket == INVALID_SOCKET)
genesis                81         return false;
genesis                82 #ifdef SO_NOSIGPIPE
genesis                83     int set = 1;
genesis                84     setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
genesis                85 #endif
genesis                86 
genesis                87     bool fProxy = (fUseProxy && addrConnect.IsRoutable());
genesis                88     struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr());
genesis                89 
genesis                90     int fFlags = fcntl(hSocket, F_GETFL, 0);
genesis                91     if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
bitcoin-asciilife...   92 
genesis                93     {
genesis                94         closesocket(hSocket);
genesis                95         return false;
genesis                96     }
genesis                97 
genesis                98 
genesis                99     if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
genesis               100     {
genesis               101         // WSAEINVAL is here because some legacy version of winsock uses it
genesis               102         if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
genesis               103         {
genesis               104             struct timeval timeout;
genesis               105             timeout.tv_sec  = nTimeout / 1000;
genesis               106             timeout.tv_usec = (nTimeout % 1000) * 1000;
genesis               107 
genesis               108             fd_set fdset;
genesis               109             FD_ZERO(&fdset);
genesis               110             FD_SET(hSocket, &fdset);
genesis               111             int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
genesis               112             if (nRet == 0)
genesis               113             {
polarbeard_better...  114                 printf(SERR SNET "connection timeout\n");
genesis               115                 closesocket(hSocket);
genesis               116                 return false;
genesis               117             }
genesis               118             if (nRet == SOCKET_ERROR)
genesis               119             {
polarbeard_better...  120                 printf(SERR SNET "select connection failed: %i\n", WSAGetLastError());
genesis               121                 closesocket(hSocket);
genesis               122                 return false;
genesis               123             }
genesis               124             socklen_t nRetSize = sizeof(nRet);
genesis               125             if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
genesis               126             {
polarbeard_better...  127                 printf(SERR SNET "getsockopt for connection failed: %i\n", WSAGetLastError());
genesis               128                 closesocket(hSocket);
genesis               129                 return false;
genesis               130             }
genesis               131             if (nRet != 0)
genesis               132             {
polarbeard_better...  133                 printf(SERR SNET "connect failed after select: %s\n", strerror(nRet));
genesis               134                 closesocket(hSocket);
genesis               135                 return false;
genesis               136             }
genesis               137         }
genesis               138         else
genesis               139         {
polarbeard_better...  140             printf(SERR SNET "connect failed: %i\n", WSAGetLastError());
genesis               141             closesocket(hSocket);
genesis               142             return false;
genesis               143         }
genesis               144     }
genesis               145 
genesis               146     /*
genesis               147     this isn't even strictly necessary
genesis               148     CNode::ConnectNode immediately turns the socket back to non-blocking
genesis               149     but we'll turn it back to blocking just in case
genesis               150     */
genesis               151     fFlags = fcntl(hSocket, F_GETFL, 0);
genesis               152     if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
genesis               153     {
genesis               154         closesocket(hSocket);
genesis               155         return false;
genesis               156     }
genesis               157 
genesis               158     if (fProxy)
genesis               159     {
polarbeard_better...  160         printf(SWAR SNET "connecting through proxy to %s\n", addrConnect.ToString().c_str());
genesis               161         char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
genesis               162         memcpy(pszSocks4IP + 2, &addrConnect.port, 2);
genesis               163         memcpy(pszSocks4IP + 4, &addrConnect.ip, 4);
genesis               164         char* pszSocks4 = pszSocks4IP;
genesis               165         int nSize = sizeof(pszSocks4IP);
genesis               166 
genesis               167         int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
genesis               168         if (ret != nSize)
genesis               169         {
genesis               170             closesocket(hSocket);
polarbeard_better...  171             return error(SNET "couldn't send message over proxy address %s",
polarbeard_better...  172                 addrConnect.ToString().c_str());
genesis               173         }
genesis               174         char pchRet[8];
genesis               175         if (recv(hSocket, pchRet, 8, 0) != 8)
genesis               176         {
genesis               177             closesocket(hSocket);
polarbeard_better...  178             return error(SNET "couldn't read response over proxy address %s",
polarbeard_better...  179                 addrConnect.ToString().c_str());
genesis               180         }
genesis               181         if (pchRet[1] != 0x5a)
genesis               182         {
genesis               183             closesocket(hSocket);
genesis               184             if (pchRet[1] != 0x5b)
polarbeard_better...  185                 printf(SERR SNET "proxy returned error %d\n", pchRet[1]);
genesis               186             return false;
genesis               187         }
polarbeard_better...  188         printf(SWAR SNET "connected through proxy to %s\n", addrConnect.ToString().c_str());
genesis               189     }
genesis               190 
genesis               191     hSocketRet = hSocket;
genesis               192     return true;
genesis               193 }
genesis               194 
genesis               195 // portDefault is in host order
asciilifeform_dns...  196 bool Lookup(const char *pszName, vector<CAddress>& vaddr, int nServices, int nMaxSolutions, int portDefault, bool fAllowPort)
genesis               197 {
genesis               198     vaddr.clear();
genesis               199     if (pszName[0] == 0)
genesis               200         return false;
genesis               201     int port = portDefault;
genesis               202     char psz[256];
genesis               203     char *pszHost = psz;
genesis               204     strlcpy(psz, pszName, sizeof(psz));
genesis               205     if (fAllowPort)
genesis               206     {
genesis               207         char* pszColon = strrchr(psz+1,':');
genesis               208         char *pszPortEnd = NULL;
genesis               209         int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0;
genesis               210         if (pszColon && pszPortEnd && pszPortEnd[0] == 0)
genesis               211         {
genesis               212             if (psz[0] == '[' && pszColon[-1] == ']')
genesis               213             {
genesis               214                 // Future: enable IPv6 colon-notation inside []
genesis               215                 pszHost = psz+1;
genesis               216                 pszColon[-1] = 0;
genesis               217             }
genesis               218             else
genesis               219                 pszColon[0] = 0;
genesis               220             port = portParsed;
genesis               221             if (port < 0 || port > USHRT_MAX)
genesis               222                 port = USHRT_MAX;
genesis               223         }
genesis               224     }
genesis               225 
genesis               226     unsigned int addrIP = inet_addr(pszHost);
genesis               227     if (addrIP != INADDR_NONE)
genesis               228     {
genesis               229         // valid IP address passed
genesis               230         vaddr.push_back(CAddress(addrIP, port, nServices));
genesis               231         return true;
genesis               232     }
genesis               233 
asciilifeform_dns...  234     return false;
genesis               235 }
genesis               236 
genesis               237 // portDefault is in host order
asciilifeform_dns...  238 bool Lookup(const char *pszName, CAddress& addr, int nServices, int portDefault, bool fAllowPort)
genesis               239 {
genesis               240     vector<CAddress> vaddr;
asciilifeform_dns...  241     bool fRet = Lookup(pszName, vaddr, nServices, 1, portDefault, fAllowPort);
genesis               242     if (fRet)
genesis               243         addr = vaddr[0];
genesis               244     return fRet;
genesis               245 }
genesis               246 
genesis               247 
genesis               248 bool AddAddress(CAddress addr, int64 nTimePenalty, CAddrDB *pAddrDB)
genesis               249 {
genesis               250     if (!addr.IsRoutable())
genesis               251         return false;
genesis               252     if (addr.ip == addrLocalHost.ip)
genesis               253         return false;
genesis               254     addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
genesis               255     bool fUpdated = false;
genesis               256     bool fNew = false;
genesis               257     CAddress addrFound = addr;
genesis               258 
genesis               259     CRITICAL_BLOCK(cs_mapAddresses)
genesis               260     {
genesis               261         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
genesis               262         if (it == mapAddresses.end())
genesis               263         {
genesis               264             // New address
polarbeard_better...  265             printf(SINF SADR "adding %s\n", addr.ToString().c_str());
genesis               266             mapAddresses.insert(make_pair(addr.GetKey(), addr));
genesis               267             fUpdated = true;
genesis               268             fNew = true;
genesis               269         }
genesis               270         else
genesis               271         {
genesis               272             addrFound = (*it).second;
genesis               273             if ((addrFound.nServices | addr.nServices) != addrFound.nServices)
genesis               274             {
genesis               275                 // Services have been added
genesis               276                 addrFound.nServices |= addr.nServices;
genesis               277                 fUpdated = true;
genesis               278             }
genesis               279             bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
genesis               280             int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
genesis               281             if (addrFound.nTime < addr.nTime - nUpdateInterval)
genesis               282             {
genesis               283                 // Periodically update most recently seen time
genesis               284                 addrFound.nTime = addr.nTime;
genesis               285                 fUpdated = true;
genesis               286             }
genesis               287         }
genesis               288     }
genesis               289     // There is a nasty deadlock bug if this is done inside the cs_mapAddresses
genesis               290     // CRITICAL_BLOCK:
genesis               291     // Thread 1:  begin db transaction (locks inside-db-mutex)
genesis               292     //            then AddAddress (locks cs_mapAddresses)
genesis               293     // Thread 2:  AddAddress (locks cs_mapAddresses)
genesis               294     //             ... then db operation hangs waiting for inside-db-mutex
genesis               295     if (fUpdated)
genesis               296     {
genesis               297         if (pAddrDB)
genesis               298             pAddrDB->WriteAddress(addrFound);
genesis               299         else
genesis               300             CAddrDB().WriteAddress(addrFound);
genesis               301     }
genesis               302     return fNew;
genesis               303 }
genesis               304 
genesis               305 void AddressCurrentlyConnected(const CAddress& addr)
genesis               306 {
genesis               307     CAddress *paddrFound = NULL;
genesis               308 
genesis               309     CRITICAL_BLOCK(cs_mapAddresses)
genesis               310     {
genesis               311         // Only if it's been published already
genesis               312         map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
genesis               313         if (it != mapAddresses.end())
genesis               314             paddrFound = &(*it).second;
genesis               315     }
genesis               316 
genesis               317     if (paddrFound)
genesis               318     {
genesis               319         int64 nUpdateInterval = 20 * 60;
genesis               320         if (paddrFound->nTime < GetAdjustedTime() - nUpdateInterval)
genesis               321         {
genesis               322             // Periodically update most recently seen time
genesis               323             paddrFound->nTime = GetAdjustedTime();
genesis               324             CAddrDB addrdb;
genesis               325             addrdb.WriteAddress(*paddrFound);
genesis               326         }
genesis               327     }
genesis               328 }
genesis               329 
genesis               330 
genesis               331 
genesis               332 
genesis               333 
genesis               334 void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1)
genesis               335 {
genesis               336     // If the dialog might get closed before the reply comes back,
genesis               337     // call this in the destructor so it doesn't get called after it's deleted.
genesis               338     CRITICAL_BLOCK(cs_vNodes)
genesis               339     {
genesis               340         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               341         {
genesis               342             CRITICAL_BLOCK(pnode->cs_mapRequests)
genesis               343             {
genesis               344                 for (map<uint256, CRequestTracker>::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();)
genesis               345                 {
genesis               346                     CRequestTracker& tracker = (*mi).second;
genesis               347                     if (tracker.fn == fn && tracker.param1 == param1)
genesis               348                         pnode->mapRequests.erase(mi++);
genesis               349                     else
genesis               350                         mi++;
genesis               351                 }
genesis               352             }
genesis               353         }
genesis               354     }
genesis               355 }
genesis               356 
genesis               357 
genesis               358 
genesis               359 
genesis               360 
genesis               361 
genesis               362 
genesis               363 //
genesis               364 // Subscription methods for the broadcast and subscription system.
genesis               365 // Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT.
genesis               366 //
genesis               367 // The subscription system uses a meet-in-the-middle strategy.
genesis               368 // With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers
genesis               369 // subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through.
genesis               370 //
genesis               371 
genesis               372 bool AnySubscribed(unsigned int nChannel)
genesis               373 {
genesis               374     if (pnodeLocalHost->IsSubscribed(nChannel))
genesis               375         return true;
genesis               376     CRITICAL_BLOCK(cs_vNodes)
genesis               377         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               378             if (pnode->IsSubscribed(nChannel))
genesis               379                 return true;
genesis               380     return false;
genesis               381 }
genesis               382 
genesis               383 bool CNode::IsSubscribed(unsigned int nChannel)
genesis               384 {
genesis               385     if (nChannel >= vfSubscribe.size())
genesis               386         return false;
genesis               387     return vfSubscribe[nChannel];
genesis               388 }
genesis               389 
genesis               390 void CNode::Subscribe(unsigned int nChannel, unsigned int nHops)
genesis               391 {
genesis               392     if (nChannel >= vfSubscribe.size())
genesis               393         return;
genesis               394 
genesis               395     if (!AnySubscribed(nChannel))
genesis               396     {
genesis               397         // Relay subscribe
genesis               398         CRITICAL_BLOCK(cs_vNodes)
genesis               399             BOOST_FOREACH(CNode* pnode, vNodes)
genesis               400                 if (pnode != this)
genesis               401                     pnode->PushMessage("subscribe", nChannel, nHops);
genesis               402     }
genesis               403 
genesis               404     vfSubscribe[nChannel] = true;
genesis               405 }
genesis               406 
genesis               407 void CNode::CancelSubscribe(unsigned int nChannel)
genesis               408 {
genesis               409     if (nChannel >= vfSubscribe.size())
genesis               410         return;
genesis               411 
genesis               412     // Prevent from relaying cancel if wasn't subscribed
genesis               413     if (!vfSubscribe[nChannel])
genesis               414         return;
genesis               415     vfSubscribe[nChannel] = false;
genesis               416 
genesis               417     if (!AnySubscribed(nChannel))
genesis               418     {
genesis               419         // Relay subscription cancel
genesis               420         CRITICAL_BLOCK(cs_vNodes)
genesis               421             BOOST_FOREACH(CNode* pnode, vNodes)
genesis               422                 if (pnode != this)
genesis               423                     pnode->PushMessage("sub-cancel", nChannel);
genesis               424     }
genesis               425 }
genesis               426 
genesis               427 
genesis               428 
genesis               429 
genesis               430 
genesis               431 
genesis               432 
genesis               433 
genesis               434 
genesis               435 CNode* FindNode(unsigned int ip)
genesis               436 {
genesis               437     CRITICAL_BLOCK(cs_vNodes)
genesis               438     {
genesis               439         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               440             if (pnode->addr.ip == ip)
genesis               441                 return (pnode);
genesis               442     }
genesis               443     return NULL;
genesis               444 }
genesis               445 
genesis               446 CNode* FindNode(CAddress addr)
genesis               447 {
genesis               448     CRITICAL_BLOCK(cs_vNodes)
genesis               449     {
genesis               450         BOOST_FOREACH(CNode* pnode, vNodes)
genesis               451             if (pnode->addr == addr)
genesis               452                 return (pnode);
genesis               453     }
genesis               454     return NULL;
genesis               455 }
genesis               456 
genesis               457 CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
genesis               458 {
genesis               459     if (addrConnect.ip == addrLocalHost.ip)
genesis               460         return NULL;
genesis               461 
genesis               462     // Look for an existing connection
genesis               463     CNode* pnode = FindNode(addrConnect.ip);
genesis               464     if (pnode)
genesis               465     {
genesis               466         if (nTimeout != 0)
genesis               467             pnode->AddRef(nTimeout);
genesis               468         else
genesis               469             pnode->AddRef();
genesis               470         return pnode;
genesis               471     }
genesis               472 
genesis               473     /// debug print
polarbeard_better...  474     printf(SINF SNET "trying to connect to %s\n",
genesis               475         addrConnect.ToString().c_str(),
genesis               476         (double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
genesis               477         (double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
genesis               478 
genesis               479     CRITICAL_BLOCK(cs_mapAddresses)
genesis               480         mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
genesis               481 
genesis               482     // Connect
genesis               483     SOCKET hSocket;
genesis               484     if (ConnectSocket(addrConnect, hSocket))
genesis               485     {
genesis               486         /// debug print
polarbeard_better...  487         printf(SINF SNET "connected to %s\n", addrConnect.ToString().c_str());
genesis               488 
genesis               489         // Set to nonblocking
genesis               490         if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
polarbeard_better...  491             printf(SERR SNET "socket fcntl nonblocking setting failed, error %d\n", errno);
genesis               492 
genesis               493         // Add node
genesis               494         CNode* pnode = new CNode(hSocket, addrConnect, false);
genesis               495         if (nTimeout != 0)
genesis               496             pnode->AddRef(nTimeout);
genesis               497         else
genesis               498             pnode->AddRef();
genesis               499         CRITICAL_BLOCK(cs_vNodes)
genesis               500             vNodes.push_back(pnode);
genesis               501 
genesis               502         pnode->nTimeConnected = GetTime();
genesis               503         return pnode;
genesis               504     }
genesis               505     else
genesis               506     {
genesis               507         return NULL;
genesis               508     }
genesis               509 }
genesis               510 
genesis               511 void CNode::CloseSocketDisconnect()
genesis               512 {
genesis               513     fDisconnect = true;
genesis               514     if (hSocket != INVALID_SOCKET)
genesis               515     {
polarbeard_better...  516         printf(SWAR SNET "disconnecting from node %s\n", addr.ToString().c_str());
genesis               517         closesocket(hSocket);
genesis               518         hSocket = INVALID_SOCKET;
genesis               519     }
genesis               520 }
genesis               521 
genesis               522 void CNode::Cleanup()
genesis               523 {
genesis               524     // All of a nodes broadcasts and subscriptions are automatically torn down
genesis               525     // when it goes down, so a node has to stay up to keep its broadcast going.
genesis               526 
genesis               527     // Cancel subscriptions
genesis               528     for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++)
genesis               529         if (vfSubscribe[nChannel])
genesis               530             CancelSubscribe(nChannel);
genesis               531 }
genesis               532 
genesis               533 
genesis               534 std::map<unsigned int, int64> CNode::setBanned;
genesis               535 CCriticalSection CNode::cs_setBanned;
genesis               536 
genesis               537 void CNode::ClearBanned()
genesis               538 {
genesis               539     setBanned.clear();
genesis               540 }
genesis               541 
genesis               542 bool CNode::IsBanned(unsigned int ip)
genesis               543 {
genesis               544     bool fResult = false;
genesis               545     CRITICAL_BLOCK(cs_setBanned)
genesis               546     {
genesis               547         std::map<unsigned int, int64>::iterator i = setBanned.find(ip);
genesis               548         if (i != setBanned.end())
genesis               549         {
genesis               550             int64 t = (*i).second;
genesis               551             if (GetTime() < t)
genesis               552                 fResult = true;
genesis               553         }
genesis               554     }
genesis               555     return fResult;
genesis               556 }
genesis               557 
genesis               558 bool CNode::Misbehaving(int howmuch)
genesis               559 {
genesis               560     if (addr.IsLocal())
genesis               561     {
polarbeard_better...  562         printf(SWAR SNET "local node %s is misbehaving\n", addr.ToString().c_str());
genesis               563         return false;
genesis               564     }
genesis               565 
genesis               566     nMisbehavior += howmuch;
genesis               567     if (nMisbehavior >= GetArg("-banscore", 100))
genesis               568     {
genesis               569         int64 banTime = GetTime()+GetArg("-bantime", 60*60*24);  // Default 24-hour ban
genesis               570         CRITICAL_BLOCK(cs_setBanned)
genesis               571             if (setBanned[addr.ip] < banTime)
genesis               572                 setBanned[addr.ip] = banTime;
genesis               573         CloseSocketDisconnect();
genesis               574         printf("Disconnected %s for misbehavior (score=%d)\n", addr.ToString().c_str(), nMisbehavior);
genesis               575         return true;
genesis               576     }
genesis               577     return false;
genesis               578 }
genesis               579 
genesis               580 
genesis               581 
genesis               582 
genesis               583 
genesis               584 
genesis               585 
genesis               586 
genesis               587 
genesis               588 
genesis               589 
genesis               590 
genesis               591 void ThreadSocketHandler(void* parg)
genesis               592 {
genesis               593     IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg));
genesis               594     try
genesis               595     {
genesis               596         vnThreadsRunning[0]++;
genesis               597         ThreadSocketHandler2(parg);
genesis               598         vnThreadsRunning[0]--;
genesis               599     }
genesis               600     catch (std::exception& e) {
genesis               601         vnThreadsRunning[0]--;
genesis               602         PrintException(&e, "ThreadSocketHandler()");
genesis               603     } catch (...) {
genesis               604         vnThreadsRunning[0]--;
genesis               605         throw; // support pthread_cancel()
genesis               606     }
polarbeard_better...  607     printf(SWAR SNET "socket handling thread exiting\n");
genesis               608 }
genesis               609 
genesis               610 void ThreadSocketHandler2(void* parg)
genesis               611 {
polarbeard_better...  612     printf(SINF SNET "socket handling thread started\n");
genesis               613     list<CNode*> vNodesDisconnected;
genesis               614     int nPrevNodeCount = 0;
genesis               615 
genesis               616     loop
genesis               617     {
genesis               618         //
genesis               619         // Disconnect nodes
genesis               620         //
genesis               621         CRITICAL_BLOCK(cs_vNodes)
genesis               622         {
genesis               623             // Disconnect unused nodes
genesis               624             vector<CNode*> vNodesCopy = vNodes;
genesis               625             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               626             {
genesis               627                 if (pnode->fDisconnect ||
genesis               628                     (pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
genesis               629                 {
genesis               630                     // remove from vNodes
genesis               631                     vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
genesis               632 
genesis               633                     // close socket and cleanup
genesis               634                     pnode->CloseSocketDisconnect();
genesis               635                     pnode->Cleanup();
genesis               636 
genesis               637                     // hold in disconnected pool until all refs are released
genesis               638                     pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60);
genesis               639                     if (pnode->fNetworkNode || pnode->fInbound)
genesis               640                         pnode->Release();
genesis               641                     vNodesDisconnected.push_back(pnode);
genesis               642                 }
genesis               643             }
genesis               644 
genesis               645             // Delete disconnected nodes
genesis               646             list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
genesis               647             BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
genesis               648             {
genesis               649                 // wait until threads are done using it
genesis               650                 if (pnode->GetRefCount() <= 0)
genesis               651                 {
genesis               652                     bool fDelete = false;
genesis               653                     TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis               654                      TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
genesis               655                       TRY_CRITICAL_BLOCK(pnode->cs_mapRequests)
genesis               656                        TRY_CRITICAL_BLOCK(pnode->cs_inventory)
genesis               657                         fDelete = true;
genesis               658                     if (fDelete)
genesis               659                     {
genesis               660                         vNodesDisconnected.remove(pnode);
genesis               661                         delete pnode;
genesis               662                     }
genesis               663                 }
genesis               664             }
genesis               665         }
genesis               666         if (vNodes.size() != nPrevNodeCount)
genesis               667         {
genesis               668             nPrevNodeCount = vNodes.size();
genesis               669             MainFrameRepaint();
genesis               670         }
genesis               671 
genesis               672 
genesis               673         //
genesis               674         // Find which sockets have data to receive
genesis               675         //
genesis               676         struct timeval timeout;
genesis               677         timeout.tv_sec  = 0;
genesis               678         timeout.tv_usec = 50000; // frequency to poll pnode->vSend
genesis               679 
genesis               680         fd_set fdsetRecv;
genesis               681         fd_set fdsetSend;
genesis               682         fd_set fdsetError;
genesis               683         FD_ZERO(&fdsetRecv);
genesis               684         FD_ZERO(&fdsetSend);
genesis               685         FD_ZERO(&fdsetError);
genesis               686         SOCKET hSocketMax = 0;
genesis               687 
genesis               688         if(hListenSocket != INVALID_SOCKET)
genesis               689             FD_SET(hListenSocket, &fdsetRecv);
genesis               690         hSocketMax = max(hSocketMax, hListenSocket);
genesis               691         CRITICAL_BLOCK(cs_vNodes)
genesis               692         {
genesis               693             BOOST_FOREACH(CNode* pnode, vNodes)
genesis               694             {
genesis               695                 if (pnode->hSocket == INVALID_SOCKET)
genesis               696                     continue;
genesis               697                 FD_SET(pnode->hSocket, &fdsetRecv);
genesis               698                 FD_SET(pnode->hSocket, &fdsetError);
genesis               699                 hSocketMax = max(hSocketMax, pnode->hSocket);
genesis               700                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis               701                     if (!pnode->vSend.empty())
genesis               702                         FD_SET(pnode->hSocket, &fdsetSend);
genesis               703             }
genesis               704         }
genesis               705 
genesis               706         vnThreadsRunning[0]--;
genesis               707         int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
genesis               708         vnThreadsRunning[0]++;
genesis               709         if (fShutdown)
genesis               710             return;
genesis               711         if (nSelect == SOCKET_ERROR)
genesis               712         {
genesis               713             int nErr = WSAGetLastError();
genesis               714             if (hSocketMax > -1)
genesis               715             {
polarbeard_better...  716                 printf(SERR SNET "socket select error %d\n", nErr);
genesis               717                 for (int i = 0; i <= hSocketMax; i++)
genesis               718                     FD_SET(i, &fdsetRecv);
genesis               719             }
genesis               720             FD_ZERO(&fdsetSend);
genesis               721             FD_ZERO(&fdsetError);
genesis               722             Sleep(timeout.tv_usec/1000);
genesis               723         }
genesis               724 
genesis               725 
genesis               726         //
genesis               727         // Accept new connections
genesis               728         //
genesis               729         if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
genesis               730         {
genesis               731             struct sockaddr_in sockaddr;
genesis               732             socklen_t len = sizeof(sockaddr);
genesis               733             SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
genesis               734             CAddress addr;
genesis               735             int nInbound = 0;
genesis               736 
genesis               737             if (hSocket != INVALID_SOCKET)
genesis               738                 addr = CAddress(sockaddr);
genesis               739 
genesis               740             CRITICAL_BLOCK(cs_vNodes)
genesis               741                 BOOST_FOREACH(CNode* pnode, vNodes)
genesis               742                 if (pnode->fInbound)
genesis               743                     nInbound++;
genesis               744 
genesis               745             if (hSocket == INVALID_SOCKET)
genesis               746             {
genesis               747                 if (WSAGetLastError() != WSAEWOULDBLOCK)
polarbeard_better...  748                     printf(SERR SNET "socket error accept failed: %d\n", WSAGetLastError());
genesis               749             }
genesis               750             else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS)
genesis               751             {
genesis               752                 closesocket(hSocket);
genesis               753             }
genesis               754             else if (CNode::IsBanned(addr.ip))
genesis               755             {
polarbeard_better...  756                 printf(SWAR SNET "connection from %s dropped. (banned)\n", addr.ToString().c_str());
genesis               757                 closesocket(hSocket);
genesis               758             }
genesis               759             else
genesis               760             {
polarbeard_better...  761                 printf(SINF SNET "accepted connection to %s\n", addr.ToString().c_str());
genesis               762                 CNode* pnode = new CNode(hSocket, addr, true);
genesis               763                 pnode->AddRef();
genesis               764                 CRITICAL_BLOCK(cs_vNodes)
genesis               765                     vNodes.push_back(pnode);
genesis               766             }
genesis               767         }
genesis               768 
genesis               769 
genesis               770         //
genesis               771         // Service each socket
genesis               772         //
genesis               773         vector<CNode*> vNodesCopy;
genesis               774         CRITICAL_BLOCK(cs_vNodes)
genesis               775         {
genesis               776             vNodesCopy = vNodes;
genesis               777             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               778                 pnode->AddRef();
genesis               779         }
genesis               780         BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               781         {
genesis               782             if (fShutdown)
genesis               783                 return;
genesis               784 
genesis               785             //
genesis               786             // Receive
genesis               787             //
genesis               788             if (pnode->hSocket == INVALID_SOCKET)
genesis               789                 continue;
genesis               790             if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
genesis               791             {
genesis               792                 TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
genesis               793                 {
genesis               794                     CDataStream& vRecv = pnode->vRecv;
genesis               795                     unsigned int nPos = vRecv.size();
genesis               796 
genesis               797                     if (nPos > ReceiveBufferSize()) {
genesis               798                         if (!pnode->fDisconnect)
polarbeard_better...  799                             printf(SWAR SNET "socket received flood, disconnecting. (%d bytes)\n", vRecv.size());
genesis               800                         pnode->CloseSocketDisconnect();
genesis               801                     }
genesis               802                     else {
genesis               803                         // typical socket buffer is 8K-64K
genesis               804                         char pchBuf[0x10000];
genesis               805                         int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
genesis               806                         if (nBytes > 0)
genesis               807                         {
genesis               808                             vRecv.resize(nPos + nBytes);
genesis               809                             memcpy(&vRecv[nPos], pchBuf, nBytes);
genesis               810                             pnode->nLastRecv = GetTime();
genesis               811                         }
genesis               812                         else if (nBytes == 0)
genesis               813                         {
genesis               814                             // socket closed gracefully
genesis               815                             if (!pnode->fDisconnect)
polarbeard_better...  816                                 printf(SWAR SNET "socket closed\n");
genesis               817                             pnode->CloseSocketDisconnect();
genesis               818                         }
genesis               819                         else if (nBytes < 0)
genesis               820                         {
genesis               821                             // error
genesis               822                             int nErr = WSAGetLastError();
genesis               823                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
genesis               824                             {
genesis               825                                 if (!pnode->fDisconnect)
polarbeard_better...  826                                     printf(SERR SNET "socket received error %d\n", nErr);
genesis               827                                 pnode->CloseSocketDisconnect();
genesis               828                             }
genesis               829                         }
genesis               830                     }
genesis               831                 }
genesis               832             }
genesis               833 
genesis               834             //
genesis               835             // Send
genesis               836             //
genesis               837             if (pnode->hSocket == INVALID_SOCKET)
genesis               838                 continue;
genesis               839             if (FD_ISSET(pnode->hSocket, &fdsetSend))
genesis               840             {
genesis               841                 TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis               842                 {
genesis               843                     CDataStream& vSend = pnode->vSend;
genesis               844                     if (!vSend.empty())
genesis               845                     {
genesis               846                         int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT);
genesis               847                         if (nBytes > 0)
genesis               848                         {
genesis               849                             vSend.erase(vSend.begin(), vSend.begin() + nBytes);
genesis               850                             pnode->nLastSend = GetTime();
genesis               851                         }
genesis               852                         else if (nBytes < 0)
genesis               853                         {
genesis               854                             // error
genesis               855                             int nErr = WSAGetLastError();
genesis               856                             if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
genesis               857                             {
polarbeard_better...  858                                 printf(SERR SNET "socket send error %d\n", nErr);
genesis               859                                 pnode->CloseSocketDisconnect();
genesis               860                             }
genesis               861                         }
genesis               862                         if (vSend.size() > SendBufferSize()) {
genesis               863                             if (!pnode->fDisconnect)
polarbeard_better...  864                                 printf(SWAR SNET "socket send flood, disconnecting. (%d bytes)\n", vSend.size());
genesis               865                             pnode->CloseSocketDisconnect();
genesis               866                         }
genesis               867                     }
genesis               868                 }
genesis               869             }
genesis               870 
genesis               871             //
genesis               872             // Inactivity checking
genesis               873             //
genesis               874             if (pnode->vSend.empty())
genesis               875                 pnode->nLastSendEmpty = GetTime();
genesis               876             if (GetTime() - pnode->nTimeConnected > 60)
genesis               877             {
genesis               878                 if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
genesis               879                 {
polarbeard_better...  880                     printf(SWAR SNET "socket received no message in first 60 seconds, disconnecting\n");
genesis               881                     pnode->fDisconnect = true;
genesis               882                 }
genesis               883                 else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
genesis               884                 {
polarbeard_better...  885                     printf(SWAR SNET "socket not sending, disconnecting\n");
genesis               886                     pnode->fDisconnect = true;
genesis               887                 }
genesis               888                 else if (GetTime() - pnode->nLastRecv > 90*60)
genesis               889                 {
polarbeard_better...  890                     printf(SWAR SNET "socket inactivity timeout, disconnecting\n");
genesis               891                     pnode->fDisconnect = true;
genesis               892                 }
genesis               893             }
genesis               894         }
genesis               895         CRITICAL_BLOCK(cs_vNodes)
genesis               896         {
genesis               897             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis               898                 pnode->Release();
genesis               899         }
genesis               900 
genesis               901         Sleep(10);
genesis               902     }
genesis               903 }
genesis               904 
genesis               905 
genesis               906 void ThreadOpenConnections(void* parg)
genesis               907 {
genesis               908     IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg));
genesis               909     try
genesis               910     {
genesis               911         vnThreadsRunning[1]++;
genesis               912         ThreadOpenConnections2(parg);
genesis               913         vnThreadsRunning[1]--;
genesis               914     }
genesis               915     catch (std::exception& e) {
genesis               916         vnThreadsRunning[1]--;
genesis               917         PrintException(&e, "ThreadOpenConnections()");
genesis               918     } catch (...) {
genesis               919         vnThreadsRunning[1]--;
genesis               920         PrintException(NULL, "ThreadOpenConnections()");
genesis               921     }
polarbeard_better...  922     printf(SWAR SNET "connection opening thread exiting\n");
genesis               923 }
genesis               924 
genesis               925 void ThreadOpenConnections2(void* parg)
genesis               926 {
polarbeard_better...  927     printf(SINF SNET "connection opening thread started\n");
genesis               928 
genesis               929     // Connect to specific addresses
genesis               930     if (mapArgs.count("-connect"))
genesis               931     {
genesis               932         for (int64 nLoop = 0;; nLoop++)
genesis               933         {
genesis               934             BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
genesis               935             {
asciilifeform_dns...  936                 CAddress addr(strAddr);
genesis               937                 if (addr.IsValid())
genesis               938                     OpenNetworkConnection(addr);
genesis               939                 for (int i = 0; i < 10 && i < nLoop; i++)
genesis               940                 {
genesis               941                     Sleep(500);
genesis               942                     if (fShutdown)
genesis               943                         return;
genesis               944                 }
genesis               945             }
genesis               946         }
genesis               947     }
genesis               948 
genesis               949     // Connect to manually added nodes first
genesis               950     if (mapArgs.count("-addnode"))
genesis               951     {
genesis               952         BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"])
genesis               953         {
asciilifeform_dns...  954             CAddress addr(strAddr);
genesis               955             if (addr.IsValid())
genesis               956             {
genesis               957                 OpenNetworkConnection(addr);
genesis               958                 Sleep(500);
genesis               959                 if (fShutdown)
genesis               960                     return;
genesis               961             }
genesis               962         }
genesis               963     }
genesis               964 
genesis               965     // Initiate network connections
genesis               966     int64 nStart = GetTime();
genesis               967     loop
genesis               968     {
genesis               969         vnThreadsRunning[1]--;
genesis               970         Sleep(500);
genesis               971         vnThreadsRunning[1]++;
genesis               972         if (fShutdown)
genesis               973             return;
genesis               974 
genesis               975         // Limit outbound connections
genesis               976         loop
genesis               977         {
genesis               978             int nOutbound = 0;
genesis               979             CRITICAL_BLOCK(cs_vNodes)
genesis               980                 BOOST_FOREACH(CNode* pnode, vNodes)
genesis               981                     if (!pnode->fInbound)
genesis               982                         nOutbound++;
genesis               983             int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS;
genesis               984             nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125));
genesis               985             if (nOutbound < nMaxOutboundConnections)
genesis               986                 break;
genesis               987             vnThreadsRunning[1]--;
genesis               988             Sleep(2000);
genesis               989             vnThreadsRunning[1]++;
genesis               990             if (fShutdown)
genesis               991                 return;
genesis               992         }
genesis               993 
genesis               994         //
genesis               995         // Choose an address to connect to based on most recently seen
genesis               996         //
genesis               997         CAddress addrConnect;
genesis               998         int64 nBest = INT64_MIN;
genesis               999 
genesis              1000         // Only connect to one address per a.b.?.? range.
genesis              1001         // Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
genesis              1002         set<unsigned int> setConnected;
genesis              1003         CRITICAL_BLOCK(cs_vNodes)
genesis              1004             BOOST_FOREACH(CNode* pnode, vNodes)
genesis              1005                 setConnected.insert(pnode->addr.ip & 0x0000ffff);
genesis              1006 
genesis              1007         int64 nANow = GetAdjustedTime();
genesis              1008 
genesis              1009         CRITICAL_BLOCK(cs_mapAddresses)
genesis              1010         {
genesis              1011             BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
genesis              1012             {
genesis              1013                 const CAddress& addr = item.second;
genesis              1014                 if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip & 0x0000ffff))
genesis              1015                     continue;
genesis              1016                 int64 nSinceLastSeen = nANow - addr.nTime;
genesis              1017                 int64 nSinceLastTry = nANow - addr.nLastTry;
genesis              1018 
genesis              1019                 // Randomize the order in a deterministic way, putting the standard port first
genesis              1020                 int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.ip * 7789) % (2 * 60 * 60);
genesis              1021                 if (addr.port != htons(GetDefaultPort()))
genesis              1022                     nRandomizer += 2 * 60 * 60;
genesis              1023 
genesis              1024                 // Last seen  Base retry frequency
genesis              1025                 //   <1 hour   10 min
genesis              1026                 //    1 hour    1 hour
genesis              1027                 //    4 hours   2 hours
genesis              1028                 //   24 hours   5 hours
genesis              1029                 //   48 hours   7 hours
genesis              1030                 //    7 days   13 hours
genesis              1031                 //   30 days   27 hours
genesis              1032                 //   90 days   46 hours
genesis              1033                 //  365 days   93 hours
genesis              1034                 int64 nDelay = (int64)(3600.0 * sqrt(fabs((double)nSinceLastSeen) / 3600.0) + nRandomizer);
genesis              1035 
genesis              1036                 // Fast reconnect for one hour after last seen
genesis              1037                 if (nSinceLastSeen < 60 * 60)
genesis              1038                     nDelay = 10 * 60;
genesis              1039 
genesis              1040                 // Limit retry frequency
genesis              1041                 if (nSinceLastTry < nDelay)
genesis              1042                     continue;
genesis              1043 
genesis              1044                 // Only try the old stuff if we don't have enough connections
genesis              1045                 if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60)
genesis              1046                     continue;
genesis              1047 
genesis              1048                 // If multiple addresses are ready, prioritize by time since
genesis              1049                 // last seen and time since last tried.
genesis              1050                 int64 nScore = min(nSinceLastTry, (int64)24 * 60 * 60) - nSinceLastSeen - nRandomizer;
genesis              1051                 if (nScore > nBest)
genesis              1052                 {
genesis              1053                     nBest = nScore;
genesis              1054                     addrConnect = addr;
genesis              1055                 }
genesis              1056             }
genesis              1057         }
genesis              1058 
genesis              1059         if (addrConnect.IsValid())
genesis              1060             OpenNetworkConnection(addrConnect);
genesis              1061     }
genesis              1062 }
genesis              1063 
genesis              1064 bool OpenNetworkConnection(const CAddress& addrConnect)
genesis              1065 {
genesis              1066     //
genesis              1067     // Initiate outbound network connection
genesis              1068     //
genesis              1069     if (fShutdown)
genesis              1070         return false;
genesis              1071     if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() ||
genesis              1072         FindNode(addrConnect.ip) || CNode::IsBanned(addrConnect.ip))
genesis              1073         return false;
genesis              1074 
genesis              1075     vnThreadsRunning[1]--;
genesis              1076     CNode* pnode = ConnectNode(addrConnect);
genesis              1077     vnThreadsRunning[1]++;
genesis              1078     if (fShutdown)
genesis              1079         return false;
genesis              1080     if (!pnode)
genesis              1081         return false;
genesis              1082     pnode->fNetworkNode = true;
genesis              1083 
genesis              1084     return true;
genesis              1085 }
genesis              1086 
genesis              1087 
genesis              1088 
genesis              1089 
genesis              1090 
genesis              1091 
genesis              1092 
genesis              1093 
genesis              1094 void ThreadMessageHandler(void* parg)
genesis              1095 {
genesis              1096     IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg));
genesis              1097     try
genesis              1098     {
genesis              1099         vnThreadsRunning[2]++;
genesis              1100         ThreadMessageHandler2(parg);
genesis              1101         vnThreadsRunning[2]--;
genesis              1102     }
genesis              1103     catch (std::exception& e) {
genesis              1104         vnThreadsRunning[2]--;
genesis              1105         PrintException(&e, "ThreadMessageHandler()");
genesis              1106     } catch (...) {
genesis              1107         vnThreadsRunning[2]--;
genesis              1108         PrintException(NULL, "ThreadMessageHandler()");
genesis              1109     }
polarbeard_better... 1110     printf(SWAR SNET "message handling thread exiting\n");
genesis              1111 }
genesis              1112 
genesis              1113 void ThreadMessageHandler2(void* parg)
genesis              1114 {
polarbeard_better... 1115     printf(SINF SNET "message handling thread starting\n");
genesis              1116     SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
genesis              1117     while (!fShutdown)
genesis              1118     {
genesis              1119         vector<CNode*> vNodesCopy;
genesis              1120         CRITICAL_BLOCK(cs_vNodes)
genesis              1121         {
genesis              1122             vNodesCopy = vNodes;
genesis              1123             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis              1124                 pnode->AddRef();
genesis              1125         }
genesis              1126 
genesis              1127         // Poll the connected nodes for messages
genesis              1128         CNode* pnodeTrickle = NULL;
genesis              1129         if (!vNodesCopy.empty())
genesis              1130             pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
genesis              1131         BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis              1132         {
genesis              1133             // Receive messages
genesis              1134             TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
genesis              1135                 ProcessMessages(pnode);
genesis              1136             if (fShutdown)
genesis              1137                 return;
genesis              1138 
genesis              1139             // Send messages
genesis              1140             TRY_CRITICAL_BLOCK(pnode->cs_vSend)
genesis              1141                 SendMessages(pnode, pnode == pnodeTrickle);
genesis              1142             if (fShutdown)
genesis              1143                 return;
genesis              1144         }
genesis              1145 
genesis              1146         CRITICAL_BLOCK(cs_vNodes)
genesis              1147         {
genesis              1148             BOOST_FOREACH(CNode* pnode, vNodesCopy)
genesis              1149                 pnode->Release();
genesis              1150         }
genesis              1151 
genesis              1152         // Wait and allow messages to bunch up.
genesis              1153         // Reduce vnThreadsRunning so StopNode has permission to exit while
genesis              1154         // we're sleeping, but we must always check fShutdown after doing this.
genesis              1155         vnThreadsRunning[2]--;
genesis              1156         Sleep(100);
genesis              1157         if (fRequestShutdown)
genesis              1158             Shutdown(NULL);
genesis              1159         vnThreadsRunning[2]++;
genesis              1160         if (fShutdown)
genesis              1161             return;
genesis              1162     }
genesis              1163 }
genesis              1164 
genesis              1165 
genesis              1166 
genesis              1167 
genesis              1168 
genesis              1169 
genesis              1170 bool BindListenPort(string& strError)
genesis              1171 {
genesis              1172     strError = "";
genesis              1173     int nOne = 1;
genesis              1174     addrLocalHost.port = htons(GetListenPort());
genesis              1175 
genesis              1176     // Create socket for listening for incoming connections
genesis              1177     hListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
genesis              1178     if (hListenSocket == INVALID_SOCKET)
genesis              1179     {
polarbeard_better... 1180         printf(SERR SNET "couldn't open socket for incoming connections, error %d\n", WSAGetLastError());
genesis              1181         return false;
genesis              1182     }
genesis              1183 
genesis              1184 #ifdef SO_NOSIGPIPE
genesis              1185     // Different way of disabling SIGPIPE on BSD
genesis              1186     setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
genesis              1187 #endif
genesis              1188 
genesis              1189     // Allow binding if the port is still in TIME_WAIT state after
genesis              1190     // the program was closed and restarted.  Not an issue on windows.
genesis              1191     setsockopt(hListenSocket, SOL_SOCKET, SO_REUSEADDR, (void*)&nOne, sizeof(int));
genesis              1192 
genesis              1193     if (fcntl(hListenSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
genesis              1194     {
polarbeard_better... 1195         printf(SERR SNET "couldn't set properties on socket for incoming connections, error %d\n", WSAGetLastError());
genesis              1196         return false;
genesis              1197     }
genesis              1198 
genesis              1199     // The sockaddr_in structure specifies the address family,
genesis              1200     // IP address, and port for the socket that is being bound
genesis              1201     struct sockaddr_in sockaddr;
genesis              1202     memset(&sockaddr, 0, sizeof(sockaddr));
genesis              1203     sockaddr.sin_family = AF_INET;
genesis              1204     sockaddr.sin_addr.s_addr = INADDR_ANY; // bind to all IPs on this computer
genesis              1205     sockaddr.sin_port = htons(GetListenPort());
genesis              1206     if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
genesis              1207     {
genesis              1208         int nErr = WSAGetLastError();
genesis              1209         if (nErr == WSAEADDRINUSE)
polarbeard_better... 1210             printf(SERR SNET "unable to bind to port %d, bitcoind is probably already running\n", ntohs(sockaddr.sin_port));
genesis              1211         else
polarbeard_better... 1212             printf(SERR SNET "unable to bind to port %d, error %d\n", ntohs(sockaddr.sin_port), nErr);
genesis              1213         return false;
genesis              1214     }
polarbeard_better... 1215     printf(SINF SNET "bound to port %d\n", ntohs(sockaddr.sin_port));
genesis              1216 
genesis              1217     // Listen for incoming connections
genesis              1218     if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
genesis              1219     {
polarbeard_better... 1220         printf(SERR SNET "listening for incoming connections failed, error %d", WSAGetLastError());
genesis              1221         return false;
genesis              1222     }
genesis              1223 
genesis              1224     return true;
genesis              1225 }
genesis              1226 
genesis              1227 void StartNode(void* parg)
genesis              1228 {
genesis              1229     if (pnodeLocalHost == NULL)
asciilifeform_dns... 1230         pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", 0, nLocalServices));
genesis              1231 
genesis              1232     // Get local host ip
genesis              1233     struct ifaddrs* myaddrs;
genesis              1234     if (getifaddrs(&myaddrs) == 0)
genesis              1235     {
genesis              1236         for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
genesis              1237         {
genesis              1238             if (ifa->ifa_addr == NULL) continue;
genesis              1239             if ((ifa->ifa_flags & IFF_UP) == 0) continue;
genesis              1240             if (strcmp(ifa->ifa_name, "lo") == 0) continue;
genesis              1241             if (strcmp(ifa->ifa_name, "lo0") == 0) continue;
genesis              1242             char pszIP[100];
genesis              1243             if (ifa->ifa_addr->sa_family == AF_INET)
genesis              1244             {
genesis              1245                 struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
genesis              1246                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s4->sin_addr), pszIP, sizeof(pszIP)) != NULL)
polarbeard_better... 1247                     printf(SINF SNET "ipv4 address %s: %s\n", ifa->ifa_name, pszIP);
genesis              1248 
genesis              1249                 // Take the first IP that isn't loopback 127.x.x.x
genesis              1250                 CAddress addr(*(unsigned int*)&s4->sin_addr, GetListenPort(), nLocalServices);
genesis              1251                 if (addr.IsValid() && addr.GetByte(3) != 127)
genesis              1252                 {
genesis              1253                     addrLocalHost = addr;
genesis              1254                     break;
genesis              1255                 }
genesis              1256             }
genesis              1257             else if (ifa->ifa_addr->sa_family == AF_INET6)
genesis              1258             {
genesis              1259                 struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
genesis              1260                 if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s6->sin6_addr), pszIP, sizeof(pszIP)) != NULL)
polarbeard_better... 1261                     printf(SINF SNET "ipv6 address %s: %s\n", ifa->ifa_name, pszIP);
genesis              1262             }
genesis              1263         }
genesis              1264         freeifaddrs(myaddrs);
genesis              1265     }
bitcoin-asciilife... 1266 
polarbeard_better... 1267     printf(SINF SNET "local host address is %s\n", addrLocalHost.ToString().c_str());
genesis              1268 
genesis              1269     if (fUseProxy || mapArgs.count("-connect") || fNoListen)
genesis              1270     {
genesis              1271         // Proxies can't take incoming connections
genesis              1272         addrLocalHost.ip = CAddress("0.0.0.0").ip;
genesis              1273     }
genesis              1274     else
genesis              1275     {
asciilifeform_ver... 1276         addrLocalHost.ip = CAddress(mapArgs["-myip"]).ip;
asciilifeform_ver... 1277         if (!addrLocalHost.IsValid())
asciilifeform_ver... 1278 	  throw runtime_error(strprintf(_("You must set myip=<ipaddress> on the command line or in the configuration file:\n%s\n"
asciilifeform_ver... 1279 					  "If the file does not exist, create it with owner-readable-only file permissions."),
asciilifeform_ver... 1280 					GetConfigFile().c_str()));
genesis              1281     }
genesis              1282 
polarbeard_better... 1283     printf(SINF SNET "local host address is %s\n", addrLocalHost.ToString().c_str());
asciilifeform_ver... 1284 
genesis              1285     //
genesis              1286     // Start threads
genesis              1287     //
genesis              1288 
genesis              1289     // Send and receive from sockets, accept connections
genesis              1290     if (!CreateThread(ThreadSocketHandler, NULL))
polarbeard_better... 1291         printf(SERR SNET "can't create socket handling thread\n");
genesis              1292 
genesis              1293     // Initiate outbound connections
genesis              1294     if (!CreateThread(ThreadOpenConnections, NULL))
polarbeard_better... 1295         printf(SERR SNET "can't create connection opening thread\n");
genesis              1296 
genesis              1297     // Process messages
genesis              1298     if (!CreateThread(ThreadMessageHandler, NULL))
polarbeard_better... 1299         printf(SERR SNET "can't create message handling thread\n");
genesis              1300 
genesis              1301     // Generate coins in the background
genesis              1302     GenerateBitcoins(fGenerateBitcoins, pwalletMain);
genesis              1303 }
genesis              1304 
genesis              1305 bool StopNode()
genesis              1306 {
polarbeard_better... 1307     printf(SWAR SNET "stopping node\n");
genesis              1308     fShutdown = true;
genesis              1309     nTransactionsUpdated++;
genesis              1310     int64 nStart = GetTime();
genesis              1311     while (vnThreadsRunning[0] > 0 || vnThreadsRunning[1] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
genesis              1312     )
genesis              1313     {
genesis              1314         if (GetTime() - nStart > 20)
genesis              1315             break;
genesis              1316         Sleep(20);
genesis              1317     }
polarbeard_better... 1318     if (vnThreadsRunning[0] > 0) printf(SWAR SNET "socket handling thread still running\n");
polarbeard_better... 1319     if (vnThreadsRunning[1] > 0) printf(SWAR SNET "connection opening thread still running\n");
polarbeard_better... 1320     if (vnThreadsRunning[2] > 0) printf(SWAR SNET "message handling thread still running\n");
polarbeard_better... 1321     if (vnThreadsRunning[3] > 0) printf(SWAR SMIN "miner thread still running\n");
polarbeard_better... 1322     if (vnThreadsRunning[4] > 0) printf(SWAR SNET "rpc server thread still running\n");
genesis              1323     while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0)
genesis              1324         Sleep(20);
genesis              1325     Sleep(50);
genesis              1326 
genesis              1327     return true;
genesis              1328 }
genesis              1329 
genesis              1330 class CNetCleanup
genesis              1331 {
genesis              1332 public:
genesis              1333     CNetCleanup()
genesis              1334     {
genesis              1335     }
genesis              1336     ~CNetCleanup()
genesis              1337     {
genesis              1338         // Close sockets
genesis              1339         BOOST_FOREACH(CNode* pnode, vNodes)
genesis              1340             if (pnode->hSocket != INVALID_SOCKET)
genesis              1341                 closesocket(pnode->hSocket);
genesis              1342         if (hListenSocket != INVALID_SOCKET)
genesis              1343             if (closesocket(hListenSocket) == SOCKET_ERROR)
polarbeard_better... 1344                 printf(SERR SNET "closing socket failed with error %d\n", WSAGetLastError());
genesis              1345 
genesis              1346     }
genesis              1347 }
genesis              1348 instance_of_cnetcleanup;