add -nolisten command line option

init.cpp

@@ -181,7 +181,8 @@ bool AppInit2(int argc, char* argv[])
             "  -rpcpassword=<pw>\t  "   + _("Password for JSON-RPC connections\n") +
             "  -rpcport=<port>  \t\t  " + _("Listen for JSON-RPC connections on <port>\n") +
             "  -rpcallowip=<ip> \t\t  " + _("Allow JSON-RPC connections from specified IP address\n") +
-            "  -rpcconnect=<ip> \t  "   + _("Send commands to node running on <ip>\n");
+            "  -rpcconnect=<ip> \t  "   + _("Send commands to node running on <ip>\n") +
+            "  -nolisten        \t  "   + _("Don't accept connections from outside");
 
 #ifdef USE_SSL
         strUsage += string() +
@@ -212,6 +213,8 @@ bool AppInit2(int argc, char* argv[])
 
     fTestNet = GetBoolArg("-testnet");
     
+    fNoListen = GetBoolArg("-nolisten");
+
     if (fCommandLine)
     {
         int ret = CommandLineRPC(argc, argv);
@@ -290,11 +293,14 @@ bool AppInit2(int argc, char* argv[])
 
     // Bind to the port early so we can tell if another instance is already running.
     string strErrors;
+    if (!fNoListen)
+    {
         if (!BindListenPort(strErrors))
         {
             wxMessageBox(strErrors, "Bitcoin");
             return false;
         }
+    }
 
     //
     // Load data files

net.cpp

@@ -643,6 +643,8 @@ void ThreadSocketHandler2(void* parg)
         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)
@@ -680,7 +682,7 @@ void ThreadSocketHandler2(void* parg)
         //
         // Accept new connections
         //
-        if (FD_ISSET(hListenSocket, &fdsetRecv))
+        if (hListenSocket != INVALID_SOCKET && FD_ISSET(hListenSocket, &fdsetRecv))
         {
             struct sockaddr_in sockaddr;
             socklen_t len = sizeof(sockaddr);
@@ -1344,7 +1346,7 @@ void StartNode(void* parg)
 #endif
     printf("addrLocalHost = %s\n", addrLocalHost.ToString().c_str());
 
-    if (fUseProxy || mapArgs.count("-connect"))
+    if (fUseProxy || mapArgs.count("-connect") || fNoListen)
     {
         // Proxies can't take incoming connections
         addrLocalHost.ip = CAddress("0.0.0.0").ip;

util.cpp

@@ -17,7 +17,7 @@ bool fDaemon = false;
 bool fCommandLine = false;
 string strMiscWarning;
 bool fTestNet = false;
-
+bool fNoListen = false;
 
 
 

util.h

@@ -146,6 +146,7 @@ extern bool fDaemon;
 extern bool fCommandLine;
 extern string strMiscWarning;
 extern bool fTestNet;
+extern bool fNoListen;
 
 void RandAddSeed();
 void RandAddSeedPerfmon();