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-rw-r--r--src/net.cpp1667
1 files changed, 1667 insertions, 0 deletions
diff --git a/src/net.cpp b/src/net.cpp
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index 0000000000..39360a334c
--- /dev/null
+++ b/src/net.cpp
@@ -0,0 +1,1667 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+
+#include "headers.h"
+
+#ifdef USE_UPNP
+#include <miniupnpc/miniwget.h>
+#include <miniupnpc/miniupnpc.h>
+#include <miniupnpc/upnpcommands.h>
+#include <miniupnpc/upnperrors.h>
+#endif
+
+using namespace std;
+using namespace boost;
+
+static const int MAX_OUTBOUND_CONNECTIONS = 8;
+
+void ThreadMessageHandler2(void* parg);
+void ThreadSocketHandler2(void* parg);
+void ThreadOpenConnections2(void* parg);
+#ifdef USE_UPNP
+void ThreadMapPort2(void* parg);
+#endif
+bool OpenNetworkConnection(const CAddress& addrConnect);
+
+
+
+
+
+//
+// Global state variables
+//
+bool fClient = false;
+bool fAllowDNS = false;
+uint64 nLocalServices = (fClient ? 0 : NODE_NETWORK);
+CAddress addrLocalHost("0.0.0.0", 0, false, nLocalServices);
+CNode* pnodeLocalHost = NULL;
+uint64 nLocalHostNonce = 0;
+array<int, 10> vnThreadsRunning;
+SOCKET hListenSocket = INVALID_SOCKET;
+
+vector<CNode*> vNodes;
+CCriticalSection cs_vNodes;
+map<vector<unsigned char>, CAddress> mapAddresses;
+CCriticalSection cs_mapAddresses;
+map<CInv, CDataStream> mapRelay;
+deque<pair<int64, CInv> > vRelayExpiration;
+CCriticalSection cs_mapRelay;
+map<CInv, int64> mapAlreadyAskedFor;
+
+// Settings
+int fUseProxy = false;
+CAddress addrProxy("127.0.0.1",9050);
+
+
+
+
+unsigned short GetListenPort()
+{
+ return (unsigned short)(GetArg("-port", GetDefaultPort()));
+}
+
+void CNode::PushGetBlocks(CBlockIndex* pindexBegin, uint256 hashEnd)
+{
+ // Filter out duplicate requests
+ if (pindexBegin == pindexLastGetBlocksBegin && hashEnd == hashLastGetBlocksEnd)
+ return;
+ pindexLastGetBlocksBegin = pindexBegin;
+ hashLastGetBlocksEnd = hashEnd;
+
+ PushMessage("getblocks", CBlockLocator(pindexBegin), hashEnd);
+}
+
+
+
+
+
+bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet)
+{
+ hSocketRet = INVALID_SOCKET;
+
+ SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if (hSocket == INVALID_SOCKET)
+ return false;
+#ifdef BSD
+ int set = 1;
+ setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
+#endif
+
+ bool fProxy = (fUseProxy && addrConnect.IsRoutable());
+ struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr());
+
+ if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
+ {
+ closesocket(hSocket);
+ return false;
+ }
+
+ if (fProxy)
+ {
+ printf("proxy connecting %s\n", addrConnect.ToString().c_str());
+ char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
+ memcpy(pszSocks4IP + 2, &addrConnect.port, 2);
+ memcpy(pszSocks4IP + 4, &addrConnect.ip, 4);
+ char* pszSocks4 = pszSocks4IP;
+ int nSize = sizeof(pszSocks4IP);
+
+ int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
+ if (ret != nSize)
+ {
+ closesocket(hSocket);
+ return error("Error sending to proxy");
+ }
+ char pchRet[8];
+ if (recv(hSocket, pchRet, 8, 0) != 8)
+ {
+ closesocket(hSocket);
+ return error("Error reading proxy response");
+ }
+ if (pchRet[1] != 0x5a)
+ {
+ closesocket(hSocket);
+ if (pchRet[1] != 0x5b)
+ printf("ERROR: Proxy returned error %d\n", pchRet[1]);
+ return false;
+ }
+ printf("proxy connected %s\n", addrConnect.ToString().c_str());
+ }
+
+ hSocketRet = hSocket;
+ return true;
+}
+
+// portDefault is in host order
+bool Lookup(const char *pszName, vector<CAddress>& vaddr, int nServices, int nMaxSolutions, bool fAllowLookup, int portDefault, bool fAllowPort)
+{
+ vaddr.clear();
+ if (pszName[0] == 0)
+ return false;
+ int port = portDefault;
+ char psz[256];
+ char *pszHost = psz;
+ strlcpy(psz, pszName, sizeof(psz));
+ if (fAllowPort)
+ {
+ char* pszColon = strrchr(psz+1,':');
+ char *pszPortEnd = NULL;
+ int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0;
+ if (pszColon && pszPortEnd && pszPortEnd[0] == 0)
+ {
+ if (psz[0] == '[' && pszColon[-1] == ']')
+ {
+ // Future: enable IPv6 colon-notation inside []
+ pszHost = psz+1;
+ pszColon[-1] = 0;
+ }
+ else
+ pszColon[0] = 0;
+ port = portParsed;
+ if (port < 0 || port > USHRT_MAX)
+ port = USHRT_MAX;
+ }
+ }
+
+ unsigned int addrIP = inet_addr(pszHost);
+ if (addrIP != INADDR_NONE)
+ {
+ // valid IP address passed
+ vaddr.push_back(CAddress(addrIP, port, nServices));
+ return true;
+ }
+
+ if (!fAllowLookup)
+ return false;
+
+ struct hostent* phostent = gethostbyname(pszHost);
+ if (!phostent)
+ return false;
+
+ if (phostent->h_addrtype != AF_INET)
+ return false;
+
+ char** ppAddr = phostent->h_addr_list;
+ while (*ppAddr != NULL && vaddr.size() != nMaxSolutions)
+ {
+ CAddress addr(((struct in_addr*)ppAddr[0])->s_addr, port, nServices);
+ if (addr.IsValid())
+ vaddr.push_back(addr);
+ ppAddr++;
+ }
+
+ return (vaddr.size() > 0);
+}
+
+// portDefault is in host order
+bool Lookup(const char *pszName, CAddress& addr, int nServices, bool fAllowLookup, int portDefault, bool fAllowPort)
+{
+ vector<CAddress> vaddr;
+ bool fRet = Lookup(pszName, vaddr, nServices, 1, fAllowLookup, portDefault, fAllowPort);
+ if (fRet)
+ addr = vaddr[0];
+ return fRet;
+}
+
+bool GetMyExternalIP2(const CAddress& addrConnect, const char* pszGet, const char* pszKeyword, unsigned int& ipRet)
+{
+ SOCKET hSocket;
+ if (!ConnectSocket(addrConnect, hSocket))
+ return error("GetMyExternalIP() : connection to %s failed", addrConnect.ToString().c_str());
+
+ send(hSocket, pszGet, strlen(pszGet), MSG_NOSIGNAL);
+
+ string strLine;
+ while (RecvLine(hSocket, strLine))
+ {
+ if (strLine.empty()) // HTTP response is separated from headers by blank line
+ {
+ loop
+ {
+ if (!RecvLine(hSocket, strLine))
+ {
+ closesocket(hSocket);
+ return false;
+ }
+ if (pszKeyword == NULL)
+ break;
+ if (strLine.find(pszKeyword) != -1)
+ {
+ strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
+ break;
+ }
+ }
+ closesocket(hSocket);
+ if (strLine.find("<") != -1)
+ strLine = strLine.substr(0, strLine.find("<"));
+ strLine = strLine.substr(strspn(strLine.c_str(), " \t\n\r"));
+ while (strLine.size() > 0 && isspace(strLine[strLine.size()-1]))
+ strLine.resize(strLine.size()-1);
+ CAddress addr(strLine,0,true);
+ printf("GetMyExternalIP() received [%s] %s\n", strLine.c_str(), addr.ToString().c_str());
+ if (addr.ip == 0 || addr.ip == INADDR_NONE || !addr.IsRoutable())
+ return false;
+ ipRet = addr.ip;
+ return true;
+ }
+ }
+ closesocket(hSocket);
+ return error("GetMyExternalIP() : connection closed");
+}
+
+// We now get our external IP from the IRC server first and only use this as a backup
+bool GetMyExternalIP(unsigned int& ipRet)
+{
+ CAddress addrConnect;
+ const char* pszGet;
+ const char* pszKeyword;
+
+ if (fUseProxy)
+ return false;
+
+ for (int nLookup = 0; nLookup <= 1; nLookup++)
+ for (int nHost = 1; nHost <= 2; nHost++)
+ {
+ // We should be phasing out our use of sites like these. If we need
+ // replacements, we should ask for volunteers to put this simple
+ // php file on their webserver that prints the client IP:
+ // <?php echo $_SERVER["REMOTE_ADDR"]; ?>
+ if (nHost == 1)
+ {
+ addrConnect = CAddress("91.198.22.70",80); // checkip.dyndns.org
+
+ if (nLookup == 1)
+ {
+ CAddress addrIP("checkip.dyndns.org", 80, true);
+ if (addrIP.IsValid())
+ addrConnect = addrIP;
+ }
+
+ pszGet = "GET / HTTP/1.1\r\n"
+ "Host: checkip.dyndns.org\r\n"
+ "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
+ "Connection: close\r\n"
+ "\r\n";
+
+ pszKeyword = "Address:";
+ }
+ else if (nHost == 2)
+ {
+ addrConnect = CAddress("74.208.43.192", 80); // www.showmyip.com
+
+ if (nLookup == 1)
+ {
+ CAddress addrIP("www.showmyip.com", 80, true);
+ if (addrIP.IsValid())
+ addrConnect = addrIP;
+ }
+
+ pszGet = "GET /simple/ HTTP/1.1\r\n"
+ "Host: www.showmyip.com\r\n"
+ "User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
+ "Connection: close\r\n"
+ "\r\n";
+
+ pszKeyword = NULL; // Returns just IP address
+ }
+
+ if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet))
+ return true;
+ }
+
+ return false;
+}
+
+void ThreadGetMyExternalIP(void* parg)
+{
+ // Wait for IRC to get it first
+ if (!GetBoolArg("-noirc"))
+ {
+ for (int i = 0; i < 2 * 60; i++)
+ {
+ Sleep(1000);
+ if (fGotExternalIP || fShutdown)
+ return;
+ }
+ }
+
+ // Fallback in case IRC fails to get it
+ if (GetMyExternalIP(addrLocalHost.ip))
+ {
+ printf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP().c_str());
+ if (addrLocalHost.IsRoutable())
+ {
+ // If we already connected to a few before we had our IP, go back and addr them.
+ // setAddrKnown automatically filters any duplicate sends.
+ CAddress addr(addrLocalHost);
+ addr.nTime = GetAdjustedTime();
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ pnode->PushAddress(addr);
+ }
+ }
+}
+
+
+
+
+
+bool AddAddress(CAddress addr, int64 nTimePenalty)
+{
+ if (!addr.IsRoutable())
+ return false;
+ if (addr.ip == addrLocalHost.ip)
+ return false;
+ addr.nTime = max((int64)0, (int64)addr.nTime - nTimePenalty);
+ CRITICAL_BLOCK(cs_mapAddresses)
+ {
+ map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
+ if (it == mapAddresses.end())
+ {
+ // New address
+ printf("AddAddress(%s)\n", addr.ToString().c_str());
+ mapAddresses.insert(make_pair(addr.GetKey(), addr));
+ CAddrDB().WriteAddress(addr);
+ return true;
+ }
+ else
+ {
+ bool fUpdated = false;
+ CAddress& addrFound = (*it).second;
+ if ((addrFound.nServices | addr.nServices) != addrFound.nServices)
+ {
+ // Services have been added
+ addrFound.nServices |= addr.nServices;
+ fUpdated = true;
+ }
+ bool fCurrentlyOnline = (GetAdjustedTime() - addr.nTime < 24 * 60 * 60);
+ int64 nUpdateInterval = (fCurrentlyOnline ? 60 * 60 : 24 * 60 * 60);
+ if (addrFound.nTime < addr.nTime - nUpdateInterval)
+ {
+ // Periodically update most recently seen time
+ addrFound.nTime = addr.nTime;
+ fUpdated = true;
+ }
+ if (fUpdated)
+ CAddrDB().WriteAddress(addrFound);
+ }
+ }
+ return false;
+}
+
+void AddressCurrentlyConnected(const CAddress& addr)
+{
+ CRITICAL_BLOCK(cs_mapAddresses)
+ {
+ // Only if it's been published already
+ map<vector<unsigned char>, CAddress>::iterator it = mapAddresses.find(addr.GetKey());
+ if (it != mapAddresses.end())
+ {
+ CAddress& addrFound = (*it).second;
+ int64 nUpdateInterval = 20 * 60;
+ if (addrFound.nTime < GetAdjustedTime() - nUpdateInterval)
+ {
+ // Periodically update most recently seen time
+ addrFound.nTime = GetAdjustedTime();
+ CAddrDB addrdb;
+ addrdb.WriteAddress(addrFound);
+ }
+ }
+ }
+}
+
+
+
+
+
+void AbandonRequests(void (*fn)(void*, CDataStream&), void* param1)
+{
+ // If the dialog might get closed before the reply comes back,
+ // call this in the destructor so it doesn't get called after it's deleted.
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ {
+ CRITICAL_BLOCK(pnode->cs_mapRequests)
+ {
+ for (map<uint256, CRequestTracker>::iterator mi = pnode->mapRequests.begin(); mi != pnode->mapRequests.end();)
+ {
+ CRequestTracker& tracker = (*mi).second;
+ if (tracker.fn == fn && tracker.param1 == param1)
+ pnode->mapRequests.erase(mi++);
+ else
+ mi++;
+ }
+ }
+ }
+ }
+}
+
+
+
+
+
+
+
+//
+// Subscription methods for the broadcast and subscription system.
+// Channel numbers are message numbers, i.e. MSG_TABLE and MSG_PRODUCT.
+//
+// The subscription system uses a meet-in-the-middle strategy.
+// With 100,000 nodes, if senders broadcast to 1000 random nodes and receivers
+// subscribe to 1000 random nodes, 99.995% (1 - 0.99^1000) of messages will get through.
+//
+
+bool AnySubscribed(unsigned int nChannel)
+{
+ if (pnodeLocalHost->IsSubscribed(nChannel))
+ return true;
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (pnode->IsSubscribed(nChannel))
+ return true;
+ return false;
+}
+
+bool CNode::IsSubscribed(unsigned int nChannel)
+{
+ if (nChannel >= vfSubscribe.size())
+ return false;
+ return vfSubscribe[nChannel];
+}
+
+void CNode::Subscribe(unsigned int nChannel, unsigned int nHops)
+{
+ if (nChannel >= vfSubscribe.size())
+ return;
+
+ if (!AnySubscribed(nChannel))
+ {
+ // Relay subscribe
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (pnode != this)
+ pnode->PushMessage("subscribe", nChannel, nHops);
+ }
+
+ vfSubscribe[nChannel] = true;
+}
+
+void CNode::CancelSubscribe(unsigned int nChannel)
+{
+ if (nChannel >= vfSubscribe.size())
+ return;
+
+ // Prevent from relaying cancel if wasn't subscribed
+ if (!vfSubscribe[nChannel])
+ return;
+ vfSubscribe[nChannel] = false;
+
+ if (!AnySubscribed(nChannel))
+ {
+ // Relay subscription cancel
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (pnode != this)
+ pnode->PushMessage("sub-cancel", nChannel);
+ }
+}
+
+
+
+
+
+
+
+
+
+CNode* FindNode(unsigned int ip)
+{
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (pnode->addr.ip == ip)
+ return (pnode);
+ }
+ return NULL;
+}
+
+CNode* FindNode(CAddress addr)
+{
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (pnode->addr == addr)
+ return (pnode);
+ }
+ return NULL;
+}
+
+CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
+{
+ if (addrConnect.ip == addrLocalHost.ip)
+ return NULL;
+
+ // Look for an existing connection
+ CNode* pnode = FindNode(addrConnect.ip);
+ if (pnode)
+ {
+ if (nTimeout != 0)
+ pnode->AddRef(nTimeout);
+ else
+ pnode->AddRef();
+ return pnode;
+ }
+
+ /// debug print
+ printf("trying connection %s lastseen=%.1fhrs lasttry=%.1fhrs\n",
+ addrConnect.ToString().c_str(),
+ (double)(addrConnect.nTime - GetAdjustedTime())/3600.0,
+ (double)(addrConnect.nLastTry - GetAdjustedTime())/3600.0);
+
+ CRITICAL_BLOCK(cs_mapAddresses)
+ mapAddresses[addrConnect.GetKey()].nLastTry = GetAdjustedTime();
+
+ // Connect
+ SOCKET hSocket;
+ if (ConnectSocket(addrConnect, hSocket))
+ {
+ /// debug print
+ printf("connected %s\n", addrConnect.ToString().c_str());
+
+ // Set to nonblocking
+#ifdef __WXMSW__
+ u_long nOne = 1;
+ if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)
+ printf("ConnectSocket() : ioctlsocket nonblocking setting failed, error %d\n", WSAGetLastError());
+#else
+ if (fcntl(hSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
+ printf("ConnectSocket() : fcntl nonblocking setting failed, error %d\n", errno);
+#endif
+
+ // Add node
+ CNode* pnode = new CNode(hSocket, addrConnect, false);
+ if (nTimeout != 0)
+ pnode->AddRef(nTimeout);
+ else
+ pnode->AddRef();
+ CRITICAL_BLOCK(cs_vNodes)
+ vNodes.push_back(pnode);
+
+ pnode->nTimeConnected = GetTime();
+ return pnode;
+ }
+ else
+ {
+ return NULL;
+ }
+}
+
+void CNode::CloseSocketDisconnect()
+{
+ fDisconnect = true;
+ if (hSocket != INVALID_SOCKET)
+ {
+ if (fDebug)
+ printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
+ printf("disconnecting node %s\n", addr.ToString().c_str());
+ closesocket(hSocket);
+ hSocket = INVALID_SOCKET;
+ }
+}
+
+void CNode::Cleanup()
+{
+ // All of a nodes broadcasts and subscriptions are automatically torn down
+ // when it goes down, so a node has to stay up to keep its broadcast going.
+
+ // Cancel subscriptions
+ for (unsigned int nChannel = 0; nChannel < vfSubscribe.size(); nChannel++)
+ if (vfSubscribe[nChannel])
+ CancelSubscribe(nChannel);
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+void ThreadSocketHandler(void* parg)
+{
+ IMPLEMENT_RANDOMIZE_STACK(ThreadSocketHandler(parg));
+ try
+ {
+ vnThreadsRunning[0]++;
+ ThreadSocketHandler2(parg);
+ vnThreadsRunning[0]--;
+ }
+ catch (std::exception& e) {
+ vnThreadsRunning[0]--;
+ PrintException(&e, "ThreadSocketHandler()");
+ } catch (...) {
+ vnThreadsRunning[0]--;
+ throw; // support pthread_cancel()
+ }
+ printf("ThreadSocketHandler exiting\n");
+}
+
+void ThreadSocketHandler2(void* parg)
+{
+ printf("ThreadSocketHandler started\n");
+ list<CNode*> vNodesDisconnected;
+ int nPrevNodeCount = 0;
+
+ loop
+ {
+ //
+ // Disconnect nodes
+ //
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ // Disconnect unused nodes
+ vector<CNode*> vNodesCopy = vNodes;
+ BOOST_FOREACH(CNode* pnode, vNodesCopy)
+ {
+ if (pnode->fDisconnect ||
+ (pnode->GetRefCount() <= 0 && pnode->vRecv.empty() && pnode->vSend.empty()))
+ {
+ // remove from vNodes
+ vNodes.erase(remove(vNodes.begin(), vNodes.end(), pnode), vNodes.end());
+
+ // close socket and cleanup
+ pnode->CloseSocketDisconnect();
+ pnode->Cleanup();
+
+ // hold in disconnected pool until all refs are released
+ pnode->nReleaseTime = max(pnode->nReleaseTime, GetTime() + 15 * 60);
+ if (pnode->fNetworkNode || pnode->fInbound)
+ pnode->Release();
+ vNodesDisconnected.push_back(pnode);
+ }
+ }
+
+ // Delete disconnected nodes
+ list<CNode*> vNodesDisconnectedCopy = vNodesDisconnected;
+ BOOST_FOREACH(CNode* pnode, vNodesDisconnectedCopy)
+ {
+ // wait until threads are done using it
+ if (pnode->GetRefCount() <= 0)
+ {
+ bool fDelete = false;
+ TRY_CRITICAL_BLOCK(pnode->cs_vSend)
+ TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
+ TRY_CRITICAL_BLOCK(pnode->cs_mapRequests)
+ TRY_CRITICAL_BLOCK(pnode->cs_inventory)
+ fDelete = true;
+ if (fDelete)
+ {
+ vNodesDisconnected.remove(pnode);
+ delete pnode;
+ }
+ }
+ }
+ }
+ if (vNodes.size() != nPrevNodeCount)
+ {
+ nPrevNodeCount = vNodes.size();
+ MainFrameRepaint();
+ }
+
+
+ //
+ // Find which sockets have data to receive
+ //
+ struct timeval timeout;
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 50000; // frequency to poll pnode->vSend
+
+ fd_set fdsetRecv;
+ fd_set fdsetSend;
+ fd_set fdsetError;
+ FD_ZERO(&fdsetRecv);
+ FD_ZERO(&fdsetSend);
+ FD_ZERO(&fdsetError);
+ SOCKET hSocketMax = 0;
+
+ if(hListenSocket != INVALID_SOCKET)
+ FD_SET(hListenSocket, &fdsetRecv);
+ hSocketMax = max(hSocketMax, hListenSocket);
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ {
+ if (pnode->hSocket == INVALID_SOCKET || pnode->hSocket < 0)
+ continue;
+ FD_SET(pnode->hSocket, &fdsetRecv);
+ FD_SET(pnode->hSocket, &fdsetError);
+ hSocketMax = max(hSocketMax, pnode->hSocket);
+ TRY_CRITICAL_BLOCK(pnode->cs_vSend)
+ if (!pnode->vSend.empty())
+ FD_SET(pnode->hSocket, &fdsetSend);
+ }
+ }
+
+ vnThreadsRunning[0]--;
+ int nSelect = select(hSocketMax + 1, &fdsetRecv, &fdsetSend, &fdsetError, &timeout);
+ vnThreadsRunning[0]++;
+ if (fShutdown)
+ return;
+ if (nSelect == SOCKET_ERROR)
+ {
+ int nErr = WSAGetLastError();
+ printf("socket select error %d\n", nErr);
+ for (int i = 0; i <= hSocketMax; i++)
+ FD_SET(i, &fdsetRecv);
+ FD_ZERO(&fdsetSend);
+ FD_ZERO(&fdsetError);
+ Sleep(timeout.tv_usec/1000);
+ }
+
+
+ //
+ // Accept new connections
+ //
+ if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
+ {
+ struct sockaddr_in sockaddr;
+ socklen_t len = sizeof(sockaddr);
+ SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
+ CAddress addr(sockaddr);
+ int nInbound = 0;
+
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (pnode->fInbound)
+ nInbound++;
+ if (hSocket == INVALID_SOCKET)
+ {
+ if (WSAGetLastError() != WSAEWOULDBLOCK)
+ printf("socket error accept failed: %d\n", WSAGetLastError());
+ }
+ else if (nInbound >= GetArg("-maxconnections", 125) - MAX_OUTBOUND_CONNECTIONS)
+ {
+ closesocket(hSocket);
+ }
+ else
+ {
+ printf("accepted connection %s\n", addr.ToString().c_str());
+ CNode* pnode = new CNode(hSocket, addr, true);
+ pnode->AddRef();
+ CRITICAL_BLOCK(cs_vNodes)
+ vNodes.push_back(pnode);
+ }
+ }
+
+
+ //
+ // Service each socket
+ //
+ vector<CNode*> vNodesCopy;
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ vNodesCopy = vNodes;
+ BOOST_FOREACH(CNode* pnode, vNodesCopy)
+ pnode->AddRef();
+ }
+ BOOST_FOREACH(CNode* pnode, vNodesCopy)
+ {
+ if (fShutdown)
+ return;
+
+ //
+ // Receive
+ //
+ if (pnode->hSocket == INVALID_SOCKET)
+ continue;
+ if (FD_ISSET(pnode->hSocket, &fdsetRecv) || FD_ISSET(pnode->hSocket, &fdsetError))
+ {
+ TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
+ {
+ CDataStream& vRecv = pnode->vRecv;
+ unsigned int nPos = vRecv.size();
+
+ if (nPos > 1000*GetArg("-maxreceivebuffer", 10*1000)) {
+ if (!pnode->fDisconnect)
+ printf("socket recv flood control disconnect (%d bytes)\n", vRecv.size());
+ pnode->CloseSocketDisconnect();
+ }
+ else {
+ // typical socket buffer is 8K-64K
+ char pchBuf[0x10000];
+ int nBytes = recv(pnode->hSocket, pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
+ if (nBytes > 0)
+ {
+ vRecv.resize(nPos + nBytes);
+ memcpy(&vRecv[nPos], pchBuf, nBytes);
+ pnode->nLastRecv = GetTime();
+ }
+ else if (nBytes == 0)
+ {
+ // socket closed gracefully
+ if (!pnode->fDisconnect)
+ printf("socket closed\n");
+ pnode->CloseSocketDisconnect();
+ }
+ else if (nBytes < 0)
+ {
+ // error
+ int nErr = WSAGetLastError();
+ if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
+ {
+ if (!pnode->fDisconnect)
+ printf("socket recv error %d\n", nErr);
+ pnode->CloseSocketDisconnect();
+ }
+ }
+ }
+ }
+ }
+
+ //
+ // Send
+ //
+ if (pnode->hSocket == INVALID_SOCKET)
+ continue;
+ if (FD_ISSET(pnode->hSocket, &fdsetSend))
+ {
+ TRY_CRITICAL_BLOCK(pnode->cs_vSend)
+ {
+ CDataStream& vSend = pnode->vSend;
+ if (!vSend.empty())
+ {
+ int nBytes = send(pnode->hSocket, &vSend[0], vSend.size(), MSG_NOSIGNAL | MSG_DONTWAIT);
+ if (nBytes > 0)
+ {
+ vSend.erase(vSend.begin(), vSend.begin() + nBytes);
+ pnode->nLastSend = GetTime();
+ }
+ else if (nBytes < 0)
+ {
+ // error
+ int nErr = WSAGetLastError();
+ if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
+ {
+ printf("socket send error %d\n", nErr);
+ pnode->CloseSocketDisconnect();
+ }
+ }
+ if (vSend.size() > 1000*GetArg("-maxsendbuffer", 10*1000)) {
+ if (!pnode->fDisconnect)
+ printf("socket send flood control disconnect (%d bytes)\n", vSend.size());
+ pnode->CloseSocketDisconnect();
+ }
+ }
+ }
+ }
+
+ //
+ // Inactivity checking
+ //
+ if (pnode->vSend.empty())
+ pnode->nLastSendEmpty = GetTime();
+ if (GetTime() - pnode->nTimeConnected > 60)
+ {
+ if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
+ {
+ printf("socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
+ pnode->fDisconnect = true;
+ }
+ else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
+ {
+ printf("socket not sending\n");
+ pnode->fDisconnect = true;
+ }
+ else if (GetTime() - pnode->nLastRecv > 90*60)
+ {
+ printf("socket inactivity timeout\n");
+ pnode->fDisconnect = true;
+ }
+ }
+ }
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ BOOST_FOREACH(CNode* pnode, vNodesCopy)
+ pnode->Release();
+ }
+
+ Sleep(10);
+ }
+}
+
+
+
+
+
+
+
+
+
+#ifdef USE_UPNP
+void ThreadMapPort(void* parg)
+{
+ IMPLEMENT_RANDOMIZE_STACK(ThreadMapPort(parg));
+ try
+ {
+ vnThreadsRunning[5]++;
+ ThreadMapPort2(parg);
+ vnThreadsRunning[5]--;
+ }
+ catch (std::exception& e) {
+ vnThreadsRunning[5]--;
+ PrintException(&e, "ThreadMapPort()");
+ } catch (...) {
+ vnThreadsRunning[5]--;
+ PrintException(NULL, "ThreadMapPort()");
+ }
+ printf("ThreadMapPort exiting\n");
+}
+
+void ThreadMapPort2(void* parg)
+{
+ printf("ThreadMapPort started\n");
+
+ char port[6];
+ sprintf(port, "%d", GetListenPort());
+
+ const char * rootdescurl = 0;
+ const char * multicastif = 0;
+ const char * minissdpdpath = 0;
+ struct UPNPDev * devlist = 0;
+ char lanaddr[64];
+
+ devlist = upnpDiscover(2000, multicastif, minissdpdpath, 0);
+
+ struct UPNPUrls urls;
+ struct IGDdatas data;
+ int r;
+
+ r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
+ if (r == 1)
+ {
+ char intClient[16];
+ char intPort[6];
+
+#ifndef __WXMSW__
+ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
+ port, port, lanaddr, 0, "TCP", 0);
+#else
+ r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
+ port, port, lanaddr, 0, "TCP", 0, "0");
+#endif
+ if(r!=UPNPCOMMAND_SUCCESS)
+ printf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
+ port, port, lanaddr, r, strupnperror(r));
+ else
+ printf("UPnP Port Mapping successful.\n");
+ loop {
+ if (fShutdown || !fUseUPnP)
+ {
+ r = UPNP_DeletePortMapping(urls.controlURL, data.first.servicetype, port, "TCP", 0);
+ printf("UPNP_DeletePortMapping() returned : %d\n", r);
+ freeUPNPDevlist(devlist); devlist = 0;
+ FreeUPNPUrls(&urls);
+ return;
+ }
+ Sleep(2000);
+ }
+ } else {
+ printf("No valid UPnP IGDs found\n");
+ freeUPNPDevlist(devlist); devlist = 0;
+ if (r != 0)
+ FreeUPNPUrls(&urls);
+ loop {
+ if (fShutdown || !fUseUPnP)
+ return;
+ Sleep(2000);
+ }
+ }
+}
+
+void MapPort(bool fMapPort)
+{
+ if (fUseUPnP != fMapPort)
+ {
+ fUseUPnP = fMapPort;
+ CWalletDB().WriteSetting("fUseUPnP", fUseUPnP);
+ }
+ if (fUseUPnP && vnThreadsRunning[5] < 1)
+ {
+ if (!CreateThread(ThreadMapPort, NULL))
+ printf("Error: ThreadMapPort(ThreadMapPort) failed\n");
+ }
+}
+#endif
+
+
+
+
+
+
+
+
+
+
+static const char *strDNSSeed[] = {
+ "bitseed.xf2.org",
+ "bitseed.bitcoin.org.uk",
+};
+
+void DNSAddressSeed()
+{
+ int found = 0;
+
+ printf("Loading addresses from DNS seeds (could take a while)\n");
+
+ for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
+ vector<CAddress> vaddr;
+ if (Lookup(strDNSSeed[seed_idx], vaddr, NODE_NETWORK, -1, true))
+ {
+ BOOST_FOREACH (CAddress& addr, vaddr)
+ {
+ if (addr.GetByte(3) != 127)
+ {
+ addr.nTime = 0;
+ AddAddress(addr);
+ found++;
+ }
+ }
+ }
+ }
+
+ printf("%d addresses found from DNS seeds\n", found);
+}
+
+
+
+unsigned int pnSeed[] =
+{
+ 0x1ddb1032, 0x6242ce40, 0x52d6a445, 0x2dd7a445, 0x8a53cd47, 0x73263750, 0xda23c257, 0xecd4ed57,
+ 0x0a40ec59, 0x75dce160, 0x7df76791, 0x89370bad, 0xa4f214ad, 0x767700ae, 0x638b0418, 0x868a1018,
+ 0xcd9f332e, 0x0129653e, 0xcc92dc3e, 0x96671640, 0x56487e40, 0x5b66f440, 0xb1d01f41, 0xf1dc6041,
+ 0xc1d12b42, 0x86ba1243, 0x6be4df43, 0x6d4cef43, 0xd18e0644, 0x1ab0b344, 0x6584a345, 0xe7c1a445,
+ 0x58cea445, 0xc5daa445, 0x21dda445, 0x3d3b5346, 0x13e55347, 0x1080d24a, 0x8e611e4b, 0x81518e4b,
+ 0x6c839e4b, 0xe2ad0a4c, 0xfbbc0a4c, 0x7f5b6e4c, 0x7244224e, 0x1300554e, 0x20690652, 0x5a48b652,
+ 0x75c5c752, 0x4335cc54, 0x340fd154, 0x87c07455, 0x087b2b56, 0x8a133a57, 0xac23c257, 0x70374959,
+ 0xfb63d45b, 0xb9a1685c, 0x180d765c, 0x674f645d, 0x04d3495e, 0x1de44b5e, 0x4ee8a362, 0x0ded1b63,
+ 0xc1b04b6d, 0x8d921581, 0x97b7ea82, 0x1cf83a8e, 0x91490bad, 0x09dc75ae, 0x9a6d79ae, 0xa26d79ae,
+ 0x0fd08fae, 0x0f3e3fb2, 0x4f944fb2, 0xcca448b8, 0x3ecd6ab8, 0xa9d5a5bc, 0x8d0119c1, 0x045997d5,
+ 0xca019dd9, 0x0d526c4d, 0xabf1ba44, 0x66b1ab55, 0x1165f462, 0x3ed7cbad, 0xa38fae6e, 0x3bd2cbad,
+ 0xd36f0547, 0x20df7840, 0x7a337742, 0x549f8e4b, 0x9062365c, 0xd399f562, 0x2b5274a1, 0x8edfa153,
+ 0x3bffb347, 0x7074bf58, 0xb74fcbad, 0x5b5a795b, 0x02fa29ce, 0x5a6738d4, 0xe8a1d23e, 0xef98c445,
+ 0x4b0f494c, 0xa2bc1e56, 0x7694ad63, 0xa4a800c3, 0x05fda6cd, 0x9f22175e, 0x364a795b, 0x536285d5,
+ 0xac44c9d4, 0x0b06254d, 0x150c2fd4, 0x32a50dcc, 0xfd79ce48, 0xf15cfa53, 0x66c01e60, 0x6bc26661,
+ 0xc03b47ae, 0x4dda1b81, 0x3285a4c1, 0x883ca96d, 0x35d60a4c, 0xdae09744, 0x2e314d61, 0x84e247cf,
+ 0x6c814552, 0x3a1cc658, 0x98d8f382, 0xe584cb5b, 0x15e86057, 0x7b01504e, 0xd852dd48, 0x56382f56,
+ 0x0a5df454, 0xa0d18d18, 0x2e89b148, 0xa79c114c, 0xcbdcd054, 0x5523bc43, 0xa9832640, 0x8a066144,
+ 0x3894c3bc, 0xab76bf58, 0x6a018ac1, 0xfebf4f43, 0x2f26c658, 0x31102f4e, 0x85e929d5, 0x2a1c175e,
+ 0xfc6c2cd1, 0x27b04b6d, 0xdf024650, 0x161748b8, 0x28be6580, 0x57be6580, 0x1cee677a, 0xaa6bb742,
+ 0x9a53964b, 0x0a5a2d4d, 0x2434c658, 0x9a494f57, 0x1ebb0e48, 0xf610b85d, 0x077ecf44, 0x085128bc,
+ 0x5ba17a18, 0x27ca1b42, 0xf8a00b56, 0xfcd4c257, 0xcf2fc15e, 0xd897e052, 0x4cada04f, 0x2f35f6d5,
+ 0x382ce8c9, 0xe523984b, 0x3f946846, 0x60c8be43, 0x41da6257, 0xde0be142, 0xae8a544b, 0xeff0c254,
+ 0x1e0f795b, 0xaeb28890, 0xca16acd9, 0x1e47ddd8, 0x8c8c4829, 0xd27dc747, 0xd53b1663, 0x4096b163,
+ 0x9c8dd958, 0xcb12f860, 0x9e79305c, 0x40c1a445, 0x4a90c2bc, 0x2c3a464d, 0x2727f23c, 0x30b04b6d,
+ 0x59024cb8, 0xa091e6ad, 0x31b04b6d, 0xc29d46a6, 0x63934fb2, 0xd9224dbe, 0x9f5910d8, 0x7f530a6b,
+ 0x752e9c95, 0x65453548, 0xa484be46, 0xce5a1b59, 0x710e0718, 0x46a13d18, 0xdaaf5318, 0xc4a8ff53,
+ 0x87abaa52, 0xb764cf51, 0xb2025d4a, 0x6d351e41, 0xc035c33e, 0xa432c162, 0x61ef34ae, 0xd16fddbc,
+ 0x0870e8c1, 0x3070e8c1, 0x9c71e8c1, 0xa4992363, 0x85a1f663, 0x4184e559, 0x18d96ed8, 0x17b8dbd5,
+ 0x60e7cd18, 0xe5ee104c, 0xab17ac62, 0x1e786e1b, 0x5d23b762, 0xf2388fae, 0x88270360, 0x9e5b3d80,
+ 0x7da518b2, 0xb5613b45, 0x1ad41f3e, 0xd550854a, 0x8617e9a9, 0x925b229c, 0xf2e92542, 0x47af0544,
+ 0x73b5a843, 0xb9b7a0ad, 0x03a748d0, 0x0a6ff862, 0x6694df62, 0x3bfac948, 0x8e098f4f, 0x746916c3,
+ 0x02f38e4f, 0x40bb1243, 0x6a54d162, 0x6008414b, 0xa513794c, 0x514aa343, 0x63781747, 0xdbb6795b,
+ 0xed065058, 0x42d24b46, 0x1518794c, 0x9b271681, 0x73e4ffad, 0x0654784f, 0x438dc945, 0x641846a6,
+ 0x2d1b0944, 0x94b59148, 0x8d369558, 0xa5a97662, 0x8b705b42, 0xce9204ae, 0x8d584450, 0x2df61555,
+ 0xeebff943, 0x2e75fb4d, 0x3ef8fc57, 0x9921135e, 0x8e31042e, 0xb5afad43, 0x89ecedd1, 0x9cfcc047,
+ 0x8fcd0f4c, 0xbe49f5ad, 0x146a8d45, 0x98669ab8, 0x98d9175e, 0xd1a8e46d, 0x839a3ab8, 0x40a0016c,
+ 0x6d27c257, 0x977fffad, 0x7baa5d5d, 0x1213be43, 0xb167e5a9, 0x640fe8ca, 0xbc9ea655, 0x0f820a4c,
+ 0x0f097059, 0x69ac957c, 0x366d8453, 0xb1ba2844, 0x8857f081, 0x70b5be63, 0xc545454b, 0xaf36ded1,
+ 0xb5a4b052, 0x21f062d1, 0x72ab89b2, 0x74a45318, 0x8312e6bc, 0xb916965f, 0x8aa7c858, 0xfe7effad,
+};
+
+
+
+void ThreadOpenConnections(void* parg)
+{
+ IMPLEMENT_RANDOMIZE_STACK(ThreadOpenConnections(parg));
+ try
+ {
+ vnThreadsRunning[1]++;
+ ThreadOpenConnections2(parg);
+ vnThreadsRunning[1]--;
+ }
+ catch (std::exception& e) {
+ vnThreadsRunning[1]--;
+ PrintException(&e, "ThreadOpenConnections()");
+ } catch (...) {
+ vnThreadsRunning[1]--;
+ PrintException(NULL, "ThreadOpenConnections()");
+ }
+ printf("ThreadOpenConnections exiting\n");
+}
+
+void ThreadOpenConnections2(void* parg)
+{
+ printf("ThreadOpenConnections started\n");
+
+ // Connect to specific addresses
+ if (mapArgs.count("-connect"))
+ {
+ for (int64 nLoop = 0;; nLoop++)
+ {
+ BOOST_FOREACH(string strAddr, mapMultiArgs["-connect"])
+ {
+ CAddress addr(strAddr, fAllowDNS);
+ if (addr.IsValid())
+ OpenNetworkConnection(addr);
+ for (int i = 0; i < 10 && i < nLoop; i++)
+ {
+ Sleep(500);
+ if (fShutdown)
+ return;
+ }
+ }
+ }
+ }
+
+ // Connect to manually added nodes first
+ if (mapArgs.count("-addnode"))
+ {
+ BOOST_FOREACH(string strAddr, mapMultiArgs["-addnode"])
+ {
+ CAddress addr(strAddr, fAllowDNS);
+ if (addr.IsValid())
+ {
+ OpenNetworkConnection(addr);
+ Sleep(500);
+ if (fShutdown)
+ return;
+ }
+ }
+ }
+
+ // Initiate network connections
+ int64 nStart = GetTime();
+ loop
+ {
+ // Limit outbound connections
+ vnThreadsRunning[1]--;
+ Sleep(500);
+ loop
+ {
+ int nOutbound = 0;
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (!pnode->fInbound)
+ nOutbound++;
+ int nMaxOutboundConnections = MAX_OUTBOUND_CONNECTIONS;
+ nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125));
+ if (nOutbound < nMaxOutboundConnections)
+ break;
+ Sleep(2000);
+ if (fShutdown)
+ return;
+ }
+ vnThreadsRunning[1]++;
+ if (fShutdown)
+ return;
+
+ CRITICAL_BLOCK(cs_mapAddresses)
+ {
+ // Add seed nodes if IRC isn't working
+ static bool fSeedUsed;
+ bool fTOR = (fUseProxy && addrProxy.port == htons(9050));
+ if (mapAddresses.empty() && (GetTime() - nStart > 60 || fTOR) && !fTestNet)
+ {
+ for (int i = 0; i < ARRAYLEN(pnSeed); 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.
+ CAddress addr;
+ addr.ip = pnSeed[i];
+ addr.nTime = 0;
+ AddAddress(addr);
+ }
+ fSeedUsed = true;
+ }
+
+ if (fSeedUsed && mapAddresses.size() > ARRAYLEN(pnSeed) + 100)
+ {
+ // Disconnect seed nodes
+ set<unsigned int> setSeed(pnSeed, pnSeed + ARRAYLEN(pnSeed));
+ static int64 nSeedDisconnected;
+ if (nSeedDisconnected == 0)
+ {
+ nSeedDisconnected = GetTime();
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (setSeed.count(pnode->addr.ip))
+ pnode->fDisconnect = true;
+ }
+
+ // Keep setting timestamps to 0 so they won't reconnect
+ if (GetTime() - nSeedDisconnected < 60 * 60)
+ {
+ BOOST_FOREACH(PAIRTYPE(const vector<unsigned char>, CAddress)& item, mapAddresses)
+ {
+ if (setSeed.count(item.second.ip) && item.second.nTime != 0)
+ {
+ item.second.nTime = 0;
+ CAddrDB().WriteAddress(item.second);
+ }
+ }
+ }
+ }
+ }
+
+
+ //
+ // Choose an address to connect to based on most recently seen
+ //
+ CAddress addrConnect;
+ int64 nBest = INT64_MIN;
+
+ // Only connect to one address per a.b.?.? range.
+ // Do this here so we don't have to critsect vNodes inside mapAddresses critsect.
+ set<unsigned int> setConnected;
+ CRITICAL_BLOCK(cs_vNodes)
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ setConnected.insert(pnode->addr.ip & 0x0000ffff);
+
+ CRITICAL_BLOCK(cs_mapAddresses)
+ {
+ BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
+ {
+ const CAddress& addr = item.second;
+ if (!addr.IsIPv4() || !addr.IsValid() || setConnected.count(addr.ip & 0x0000ffff))
+ continue;
+ int64 nSinceLastSeen = GetAdjustedTime() - addr.nTime;
+ int64 nSinceLastTry = GetAdjustedTime() - addr.nLastTry;
+
+ // Randomize the order in a deterministic way, putting the standard port first
+ int64 nRandomizer = (uint64)(nStart * 4951 + addr.nLastTry * 9567851 + addr.ip * 7789) % (2 * 60 * 60);
+ if (addr.port != htons(GetDefaultPort()))
+ nRandomizer += 2 * 60 * 60;
+
+ // Last seen Base retry frequency
+ // <1 hour 10 min
+ // 1 hour 1 hour
+ // 4 hours 2 hours
+ // 24 hours 5 hours
+ // 48 hours 7 hours
+ // 7 days 13 hours
+ // 30 days 27 hours
+ // 90 days 46 hours
+ // 365 days 93 hours
+ int64 nDelay = (int64)(3600.0 * sqrt(fabs((double)nSinceLastSeen) / 3600.0) + nRandomizer);
+
+ // Fast reconnect for one hour after last seen
+ if (nSinceLastSeen < 60 * 60)
+ nDelay = 10 * 60;
+
+ // Limit retry frequency
+ if (nSinceLastTry < nDelay)
+ continue;
+
+ // If we have IRC, we'll be notified when they first come online,
+ // and again every 24 hours by the refresh broadcast.
+ if (nGotIRCAddresses > 0 && vNodes.size() >= 2 && nSinceLastSeen > 24 * 60 * 60)
+ continue;
+
+ // Only try the old stuff if we don't have enough connections
+ if (vNodes.size() >= 8 && nSinceLastSeen > 24 * 60 * 60)
+ continue;
+
+ // If multiple addresses are ready, prioritize by time since
+ // last seen and time since last tried.
+ int64 nScore = min(nSinceLastTry, (int64)24 * 60 * 60) - nSinceLastSeen - nRandomizer;
+ if (nScore > nBest)
+ {
+ nBest = nScore;
+ addrConnect = addr;
+ }
+ }
+ }
+
+ if (addrConnect.IsValid())
+ OpenNetworkConnection(addrConnect);
+ }
+}
+
+bool OpenNetworkConnection(const CAddress& addrConnect)
+{
+ //
+ // Initiate outbound network connection
+ //
+ if (fShutdown)
+ return false;
+ if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() || FindNode(addrConnect.ip))
+ return false;
+
+ vnThreadsRunning[1]--;
+ CNode* pnode = ConnectNode(addrConnect);
+ vnThreadsRunning[1]++;
+ if (fShutdown)
+ return false;
+ if (!pnode)
+ return false;
+ pnode->fNetworkNode = true;
+
+ return true;
+}
+
+
+
+
+
+
+
+
+void ThreadMessageHandler(void* parg)
+{
+ IMPLEMENT_RANDOMIZE_STACK(ThreadMessageHandler(parg));
+ try
+ {
+ vnThreadsRunning[2]++;
+ ThreadMessageHandler2(parg);
+ vnThreadsRunning[2]--;
+ }
+ catch (std::exception& e) {
+ vnThreadsRunning[2]--;
+ PrintException(&e, "ThreadMessageHandler()");
+ } catch (...) {
+ vnThreadsRunning[2]--;
+ PrintException(NULL, "ThreadMessageHandler()");
+ }
+ printf("ThreadMessageHandler exiting\n");
+}
+
+void ThreadMessageHandler2(void* parg)
+{
+ printf("ThreadMessageHandler started\n");
+ SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL);
+ while (!fShutdown)
+ {
+ vector<CNode*> vNodesCopy;
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ vNodesCopy = vNodes;
+ BOOST_FOREACH(CNode* pnode, vNodesCopy)
+ pnode->AddRef();
+ }
+
+ // Poll the connected nodes for messages
+ CNode* pnodeTrickle = NULL;
+ if (!vNodesCopy.empty())
+ pnodeTrickle = vNodesCopy[GetRand(vNodesCopy.size())];
+ BOOST_FOREACH(CNode* pnode, vNodesCopy)
+ {
+ // Receive messages
+ TRY_CRITICAL_BLOCK(pnode->cs_vRecv)
+ ProcessMessages(pnode);
+ if (fShutdown)
+ return;
+
+ // Send messages
+ TRY_CRITICAL_BLOCK(pnode->cs_vSend)
+ SendMessages(pnode, pnode == pnodeTrickle);
+ if (fShutdown)
+ return;
+ }
+
+ CRITICAL_BLOCK(cs_vNodes)
+ {
+ BOOST_FOREACH(CNode* pnode, vNodesCopy)
+ pnode->Release();
+ }
+
+ // Wait and allow messages to bunch up.
+ // Reduce vnThreadsRunning so StopNode has permission to exit while
+ // we're sleeping, but we must always check fShutdown after doing this.
+ vnThreadsRunning[2]--;
+ Sleep(100);
+ if (fRequestShutdown)
+ Shutdown(NULL);
+ vnThreadsRunning[2]++;
+ if (fShutdown)
+ return;
+ }
+}
+
+
+
+
+
+
+bool BindListenPort(string& strError)
+{
+ strError = "";
+ int nOne = 1;
+ addrLocalHost.port = htons(GetListenPort());
+
+#ifdef __WXMSW__
+ // Initialize Windows Sockets
+ WSADATA wsadata;
+ int ret = WSAStartup(MAKEWORD(2,2), &wsadata);
+ if (ret != NO_ERROR)
+ {
+ strError = strprintf("Error: TCP/IP socket library failed to start (WSAStartup returned error %d)", ret);
+ printf("%s\n", strError.c_str());
+ return false;
+ }
+#endif
+
+ // Create socket for listening for incoming connections
+ hListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if (hListenSocket == INVALID_SOCKET)
+ {
+ strError = strprintf("Error: Couldn't open socket for incoming connections (socket returned error %d)", WSAGetLastError());
+ printf("%s\n", strError.c_str());
+ return false;
+ }
+
+#ifdef BSD
+ // Different way of disabling SIGPIPE on BSD
+ setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
+#endif
+
+#ifndef __WXMSW__
+ // 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));
+#endif
+
+#ifdef __WXMSW__
+ // Set to nonblocking, incoming connections will also inherit this
+ if (ioctlsocket(hListenSocket, FIONBIO, (u_long*)&nOne) == SOCKET_ERROR)
+#else
+ if (fcntl(hListenSocket, F_SETFL, O_NONBLOCK) == SOCKET_ERROR)
+#endif
+ {
+ strError = strprintf("Error: Couldn't set properties on socket for incoming connections (error %d)", WSAGetLastError());
+ printf("%s\n", strError.c_str());
+ return false;
+ }
+
+ // The sockaddr_in structure specifies the address family,
+ // IP address, and port for the socket that is being bound
+ struct sockaddr_in sockaddr;
+ memset(&sockaddr, 0, sizeof(sockaddr));
+ sockaddr.sin_family = AF_INET;
+ sockaddr.sin_addr.s_addr = INADDR_ANY; // bind to all IPs on this computer
+ sockaddr.sin_port = htons(GetListenPort());
+ if (::bind(hListenSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
+ {
+ int nErr = WSAGetLastError();
+ if (nErr == WSAEADDRINUSE)
+ strError = strprintf(_("Unable to bind to port %d on this computer. Bitcoin is probably already running."), ntohs(sockaddr.sin_port));
+ else
+ strError = strprintf("Error: Unable to bind to port %d on this computer (bind returned error %d)", ntohs(sockaddr.sin_port), nErr);
+ printf("%s\n", strError.c_str());
+ return false;
+ }
+ printf("Bound to port %d\n", ntohs(sockaddr.sin_port));
+
+ // Listen for incoming connections
+ if (listen(hListenSocket, SOMAXCONN) == SOCKET_ERROR)
+ {
+ strError = strprintf("Error: Listening for incoming connections failed (listen returned error %d)", WSAGetLastError());
+ printf("%s\n", strError.c_str());
+ return false;
+ }
+
+ return true;
+}
+
+void StartNode(void* parg)
+{
+ if (pnodeLocalHost == NULL)
+ pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", 0, false, nLocalServices));
+
+#ifdef __WXMSW__
+ // Get local host ip
+ char pszHostName[1000] = "";
+ if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
+ {
+ vector<CAddress> vaddr;
+ if (Lookup(pszHostName, vaddr, nLocalServices, -1, true))
+ BOOST_FOREACH (const CAddress &addr, vaddr)
+ if (addr.GetByte(3) != 127)
+ {
+ addrLocalHost = addr;
+ break;
+ }
+ }
+#else
+ // Get local host ip
+ struct ifaddrs* myaddrs;
+ if (getifaddrs(&myaddrs) == 0)
+ {
+ for (struct ifaddrs* ifa = myaddrs; ifa != NULL; ifa = ifa->ifa_next)
+ {
+ if (ifa->ifa_addr == NULL) continue;
+ if ((ifa->ifa_flags & IFF_UP) == 0) continue;
+ if (strcmp(ifa->ifa_name, "lo") == 0) continue;
+ if (strcmp(ifa->ifa_name, "lo0") == 0) continue;
+ char pszIP[100];
+ if (ifa->ifa_addr->sa_family == AF_INET)
+ {
+ struct sockaddr_in* s4 = (struct sockaddr_in*)(ifa->ifa_addr);
+ if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s4->sin_addr), pszIP, sizeof(pszIP)) != NULL)
+ printf("ipv4 %s: %s\n", ifa->ifa_name, pszIP);
+
+ // Take the first IP that isn't loopback 127.x.x.x
+ CAddress addr(*(unsigned int*)&s4->sin_addr, GetListenPort(), nLocalServices);
+ if (addr.IsValid() && addr.GetByte(3) != 127)
+ {
+ addrLocalHost = addr;
+ break;
+ }
+ }
+ else if (ifa->ifa_addr->sa_family == AF_INET6)
+ {
+ struct sockaddr_in6* s6 = (struct sockaddr_in6*)(ifa->ifa_addr);
+ if (inet_ntop(ifa->ifa_addr->sa_family, (void*)&(s6->sin6_addr), pszIP, sizeof(pszIP)) != NULL)
+ printf("ipv6 %s: %s\n", ifa->ifa_name, pszIP);
+ }
+ }
+ freeifaddrs(myaddrs);
+ }
+#endif
+ printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
+
+ if (fUseProxy || mapArgs.count("-connect") || fNoListen)
+ {
+ // Proxies can't take incoming connections
+ addrLocalHost.ip = CAddress("0.0.0.0").ip;
+ printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
+ }
+ else
+ {
+ CreateThread(ThreadGetMyExternalIP, NULL);
+ }
+
+ //
+ // Start threads
+ //
+
+ // Map ports with UPnP
+ if (fHaveUPnP)
+ MapPort(fUseUPnP);
+
+ // Get addresses from IRC and advertise ours
+ if (!CreateThread(ThreadIRCSeed, NULL))
+ printf("Error: CreateThread(ThreadIRCSeed) failed\n");
+
+ // Send and receive from sockets, accept connections
+ pthread_t hThreadSocketHandler = CreateThread(ThreadSocketHandler, NULL, true);
+
+ // Initiate outbound connections
+ if (!CreateThread(ThreadOpenConnections, NULL))
+ printf("Error: CreateThread(ThreadOpenConnections) failed\n");
+
+ // Process messages
+ if (!CreateThread(ThreadMessageHandler, NULL))
+ printf("Error: CreateThread(ThreadMessageHandler) failed\n");
+
+ // Generate coins in the background
+ GenerateBitcoins(fGenerateBitcoins);
+}
+
+bool StopNode()
+{
+ printf("StopNode()\n");
+ fShutdown = true;
+ nTransactionsUpdated++;
+ int64 nStart = GetTime();
+ while (vnThreadsRunning[0] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
+#ifdef USE_UPNP
+ || vnThreadsRunning[5] > 0
+#endif
+ )
+ {
+ if (GetTime() - nStart > 20)
+ break;
+ Sleep(20);
+ }
+ if (vnThreadsRunning[0] > 0) printf("ThreadSocketHandler still running\n");
+ if (vnThreadsRunning[1] > 0) printf("ThreadOpenConnections still running\n");
+ if (vnThreadsRunning[2] > 0) printf("ThreadMessageHandler still running\n");
+ if (vnThreadsRunning[3] > 0) printf("ThreadBitcoinMiner still running\n");
+ if (vnThreadsRunning[4] > 0) printf("ThreadRPCServer still running\n");
+ if (fHaveUPnP && vnThreadsRunning[5] > 0) printf("ThreadMapPort still running\n");
+ while (vnThreadsRunning[2] > 0 || vnThreadsRunning[4] > 0)
+ Sleep(20);
+ Sleep(50);
+
+ return true;
+}
+
+class CNetCleanup
+{
+public:
+ CNetCleanup()
+ {
+ }
+ ~CNetCleanup()
+ {
+ // Close sockets
+ BOOST_FOREACH(CNode* pnode, vNodes)
+ if (pnode->hSocket != INVALID_SOCKET)
+ closesocket(pnode->hSocket);
+ if (hListenSocket != INVALID_SOCKET)
+ if (closesocket(hListenSocket) == SOCKET_ERROR)
+ printf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError());
+
+#ifdef __WXMSW__
+ // Shutdown Windows Sockets
+ WSACleanup();
+#endif
+ }
+}
+instance_of_cnetcleanup;
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-02 06:04:08 +0000