Merge branch '0.4.x' into 0.5.x
[novacoin.git] / src / net.cpp
index b35a79d..5b3faea 100644 (file)
@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2011 The Bitcoin developers
+// Copyright (c) 2009-2012 The Bitcoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
 
@@ -10,7 +10,7 @@
 #include "init.h"
 #include "strlcpy.h"
 
-#ifdef __WXMSW__
+#ifdef WIN32
 #include <string.h>
 #endif
 
@@ -103,7 +103,7 @@ bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout
     bool fProxy = (fUseProxy && addrConnect.IsRoutable());
     struct sockaddr_in sockaddr = (fProxy ? addrProxy.GetSockAddr() : addrConnect.GetSockAddr());
 
-#ifdef __WXMSW__
+#ifdef WIN32
     u_long fNonblock = 1;
     if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
 #else
@@ -142,7 +142,7 @@ bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout
                 return false;
             }
             socklen_t nRetSize = sizeof(nRet);
-#ifdef __WXMSW__
+#ifdef WIN32
             if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
 #else
             if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
@@ -159,7 +159,7 @@ bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout
                 return false;
             }
         }
-#ifdef __WXMSW__
+#ifdef WIN32
         else if (WSAGetLastError() != WSAEISCONN)
 #else
         else
@@ -176,7 +176,7 @@ bool ConnectSocket(const CAddress& addrConnect, SOCKET& hSocketRet, int nTimeout
     CNode::ConnectNode immediately turns the socket back to non-blocking
     but we'll turn it back to blocking just in case
     */
-#ifdef __WXMSW__
+#ifdef WIN32
     fNonblock = 0;
     if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
 #else
@@ -316,14 +316,14 @@ bool GetMyExternalIP2(const CAddress& addrConnect, const char* pszGet, const cha
                 }
                 if (pszKeyword == NULL)
                     break;
-                if (strLine.find(pszKeyword) != -1)
+                if (strLine.find(pszKeyword) != string::npos)
                 {
                     strLine = strLine.substr(strLine.find(pszKeyword) + strlen(pszKeyword));
                     break;
                 }
             }
             closesocket(hSocket);
-            if (strLine.find("<") != -1)
+            if (strLine.find("<") != string::npos)
                 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]))
@@ -679,7 +679,7 @@ CNode* ConnectNode(CAddress addrConnect, int64 nTimeout)
         printf("connected %s\n", addrConnect.ToString().c_str());
 
         // Set to nonblocking
-#ifdef __WXMSW__
+#ifdef WIN32
         u_long nOne = 1;
         if (ioctlsocket(hSocket, FIONBIO, &nOne) == SOCKET_ERROR)
             printf("ConnectSocket() : ioctlsocket nonblocking setting failed, error %d\n", WSAGetLastError());
@@ -716,6 +716,7 @@ void CNode::CloseSocketDisconnect()
         printf("disconnecting node %s\n", addr.ToString().c_str());
         closesocket(hSocket);
         hSocket = INVALID_SOCKET;
+        vRecv.clear();
     }
 }
 
@@ -731,6 +732,52 @@ void CNode::Cleanup()
 }
 
 
+std::map<unsigned int, int64> CNode::setBanned;
+CCriticalSection CNode::cs_setBanned;
+
+void CNode::ClearBanned()
+{
+    setBanned.clear();
+}
+
+bool CNode::IsBanned(unsigned int ip)
+{
+    bool fResult = false;
+    CRITICAL_BLOCK(cs_setBanned)
+    {
+        std::map<unsigned int, int64>::iterator i = setBanned.find(ip);
+        if (i != setBanned.end())
+        {
+            int64 t = (*i).second;
+            if (GetTime() < t)
+                fResult = true;
+        }
+    }
+    return fResult;
+}
+
+bool CNode::Misbehaving(int howmuch)
+{
+    if (addr.IsLocal())
+    {
+        printf("Warning: local node %s misbehaving\n", addr.ToString().c_str());
+        return false;
+    }
+
+    nMisbehavior += howmuch;
+    if (nMisbehavior >= GetArg("-banscore", 100))
+    {
+        int64 banTime = GetTime()+GetArg("-bantime", 60*60*24);  // Default 24-hour ban
+        CRITICAL_BLOCK(cs_setBanned)
+            if (setBanned[addr.ip] < banTime)
+                setBanned[addr.ip] = banTime;
+        CloseSocketDisconnect();
+        printf("Disconnected %s for misbehavior (score=%d)\n", addr.ToString().c_str(), nMisbehavior);
+        return true;
+    }
+    return false;
+}
+
 
 
 
@@ -868,7 +915,7 @@ void ThreadSocketHandler2(void* parg)
             if (hSocketMax > -1)
             {
                 printf("socket select error %d\n", nErr);
-                for (int i = 0; i <= hSocketMax; i++)
+                for (unsigned int i = 0; i <= hSocketMax; i++)
                     FD_SET(i, &fdsetRecv);
             }
             FD_ZERO(&fdsetSend);
@@ -885,13 +932,17 @@ void ThreadSocketHandler2(void* parg)
             struct sockaddr_in sockaddr;
             socklen_t len = sizeof(sockaddr);
             SOCKET hSocket = accept(hListenSocket, (struct sockaddr*)&sockaddr, &len);
-            CAddress addr(sockaddr);
+            CAddress addr;
             int nInbound = 0;
 
+            if (hSocket != INVALID_SOCKET)
+                addr = CAddress(sockaddr);
+
             CRITICAL_BLOCK(cs_vNodes)
                 BOOST_FOREACH(CNode* pnode, vNodes)
                 if (pnode->fInbound)
                     nInbound++;
+
             if (hSocket == INVALID_SOCKET)
             {
                 if (WSAGetLastError() != WSAEWOULDBLOCK)
@@ -901,6 +952,11 @@ void ThreadSocketHandler2(void* parg)
             {
                 closesocket(hSocket);
             }
+            else if (CNode::IsBanned(addr.ip))
+            {
+                printf("connection from %s dropped (banned)\n", addr.ToString().c_str());
+                closesocket(hSocket);
+            }
             else
             {
                 printf("accepted connection %s\n", addr.ToString().c_str());
@@ -1103,13 +1159,33 @@ void ThreadMapPort2(void* parg)
     r = UPNP_GetValidIGD(devlist, &urls, &data, lanaddr, sizeof(lanaddr));
     if (r == 1)
     {
+        if (!addrLocalHost.IsRoutable())
+        {
+            char externalIPAddress[40];
+            r = UPNP_GetExternalIPAddress(urls.controlURL, data.first.servicetype, externalIPAddress);
+            if(r != UPNPCOMMAND_SUCCESS)
+                printf("UPnP: GetExternalIPAddress() returned %d\n", r);
+            else
+            {
+                if(externalIPAddress[0])
+                {
+                    printf("UPnP: ExternalIPAddress = %s\n", externalIPAddress);
+                    CAddress addrExternalFromUPnP(externalIPAddress, 0, false, nLocalServices);
+                    if (addrExternalFromUPnP.IsRoutable())
+                        addrLocalHost = addrExternalFromUPnP;
+                }
+                else
+                    printf("UPnP: GetExternalIPAddress failed.\n");
+            }
+        }
+
         string strDesc = "Bitcoin " + FormatFullVersion();
 #ifndef UPNPDISCOVER_SUCCESS
-    /* miniupnpc 1.5 */
+        /* miniupnpc 1.5 */
         r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
                             port, port, lanaddr, strDesc.c_str(), "TCP", 0);
 #else
-    /* miniupnpc 1.6 */
+        /* miniupnpc 1.6 */
         r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
                             port, port, lanaddr, strDesc.c_str(), "TCP", 0, "0");
 #endif
@@ -1119,6 +1195,7 @@ void ThreadMapPort2(void* parg)
                 port, port, lanaddr, r, strupnperror(r));
         else
             printf("UPnP Port Mapping successful.\n");
+        int i = 1;
         loop {
             if (fShutdown || !fUseUPnP)
             {
@@ -1128,7 +1205,26 @@ void ThreadMapPort2(void* parg)
                 FreeUPNPUrls(&urls);
                 return;
             }
+            if (i % 600 == 0) // Refresh every 20 minutes
+            {
+#ifndef UPNPDISCOVER_SUCCESS
+                /* miniupnpc 1.5 */
+                r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
+                                    port, port, lanaddr, strDesc.c_str(), "TCP", 0);
+#else
+                /* miniupnpc 1.6 */
+                r = UPNP_AddPortMapping(urls.controlURL, data.first.servicetype,
+                                    port, port, lanaddr, strDesc.c_str(), "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");;
+            }
             Sleep(2000);
+            i++;
         }
     } else {
         printf("No valid UPnP IGDs found\n");
@@ -1207,7 +1303,7 @@ void ThreadDNSAddressSeed2(void* parg)
     {
         printf("Loading addresses from DNS seeds (could take a while)\n");
 
-        for (int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
+        for (unsigned int seed_idx = 0; seed_idx < ARRAYLEN(strDNSSeed); seed_idx++) {
             vector<CAddress> vaddr;
             if (Lookup(strDNSSeed[seed_idx], vaddr, NODE_NETWORK, -1, true))
             {
@@ -1387,9 +1483,13 @@ void ThreadOpenConnections2(void* parg)
     int64 nStart = GetTime();
     loop
     {
-        // Limit outbound connections
         vnThreadsRunning[1]--;
         Sleep(500);
+        vnThreadsRunning[1]++;
+        if (fShutdown)
+            return;
+
+        // Limit outbound connections
         loop
         {
             int nOutbound = 0;
@@ -1401,13 +1501,12 @@ void ThreadOpenConnections2(void* parg)
             nMaxOutboundConnections = min(nMaxOutboundConnections, (int)GetArg("-maxconnections", 125));
             if (nOutbound < nMaxOutboundConnections)
                 break;
+            vnThreadsRunning[1]--;
             Sleep(2000);
+            vnThreadsRunning[1]++;
             if (fShutdown)
                 return;
         }
-        vnThreadsRunning[1]++;
-        if (fShutdown)
-            return;
 
         bool fAddSeeds = false;
 
@@ -1421,7 +1520,7 @@ void ThreadOpenConnections2(void* parg)
 
         if (fAddSeeds)
         {
-            for (int i = 0; i < ARRAYLEN(pnSeed); i++)
+            for (unsigned 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.
@@ -1448,6 +1547,8 @@ void ThreadOpenConnections2(void* parg)
             BOOST_FOREACH(CNode* pnode, vNodes)
                 setConnected.insert(pnode->addr.ip & 0x0000ffff);
 
+        int64 nANow = GetAdjustedTime();
+
         CRITICAL_BLOCK(cs_mapAddresses)
         {
             BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
@@ -1455,8 +1556,8 @@ void ThreadOpenConnections2(void* parg)
                 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;
+                int64 nSinceLastSeen = nANow - addr.nTime;
+                int64 nSinceLastTry = nANow - 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);
@@ -1515,7 +1616,8 @@ bool OpenNetworkConnection(const CAddress& addrConnect)
     //
     if (fShutdown)
         return false;
-    if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() || FindNode(addrConnect.ip))
+    if (addrConnect.ip == addrLocalHost.ip || !addrConnect.IsIPv4() ||
+        FindNode(addrConnect.ip) || CNode::IsBanned(addrConnect.ip))
         return false;
 
     vnThreadsRunning[1]--;
@@ -1619,7 +1721,7 @@ bool BindListenPort(string& strError)
     int nOne = 1;
     addrLocalHost.port = htons(GetListenPort());
 
-#ifdef __WXMSW__
+#ifdef WIN32
     // Initialize Windows Sockets
     WSADATA wsadata;
     int ret = WSAStartup(MAKEWORD(2,2), &wsadata);
@@ -1645,13 +1747,13 @@ bool BindListenPort(string& strError)
     setsockopt(hListenSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nOne, sizeof(int));
 #endif
 
-#ifndef __WXMSW__
+#ifndef WIN32
     // 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__
+#ifdef WIN32
     // Set to nonblocking, incoming connections will also inherit this
     if (ioctlsocket(hListenSocket, FIONBIO, (u_long*)&nOne) == SOCKET_ERROR)
 #else
@@ -1698,7 +1800,7 @@ void StartNode(void* parg)
     if (pnodeLocalHost == NULL)
         pnodeLocalHost = new CNode(INVALID_SOCKET, CAddress("127.0.0.1", 0, false, nLocalServices));
 
-#ifdef __WXMSW__
+#ifdef WIN32
     // Get local host ip
     char pszHostName[1000] = "";
     if (gethostname(pszHostName, sizeof(pszHostName)) != SOCKET_ERROR)
@@ -1801,7 +1903,7 @@ bool StopNode()
     fShutdown = true;
     nTransactionsUpdated++;
     int64 nStart = GetTime();
-    while (vnThreadsRunning[0] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
+    while (vnThreadsRunning[0] > 0 || vnThreadsRunning[1] > 0 || vnThreadsRunning[2] > 0 || vnThreadsRunning[3] > 0 || vnThreadsRunning[4] > 0
 #ifdef USE_UPNP
         || vnThreadsRunning[5] > 0
 #endif
@@ -1841,7 +1943,7 @@ public:
             if (closesocket(hListenSocket) == SOCKET_ERROR)
                 printf("closesocket(hListenSocket) failed with error %d\n", WSAGetLastError());
 
-#ifdef __WXMSW__
+#ifdef WIN32
         // Shutdown Windows Sockets
         WSACleanup();
 #endif