Merge #8996: Network activity toggle

19f46f1 Qt: New network_disabled icon (Luke Dashjr)
54cf997 RPC/Net: Use boolean consistently for networkactive, and remove from getinfo (Luke Dashjr)
b2b33d9 Overhaul network activity toggle (Jonas Schnelli)
32efa79 Qt: Add GUI feedback and control of network activity state. (Jon Lund Steffensen)
e38993b RPC: Add "togglenetwork" method to toggle network activity temporarily (Jon Lund Steffensen)
7c9a98a Allow network activity to be temporarily suspended. (Jon Lund Steffensen)

src/net.cpp

@@ -985,6 +985,12 @@ void CConnman::AcceptConnection(const ListenSocket& hListenSocket) {
         return;
     }
 
+    if (!fNetworkActive) {
+        LogPrintf("connection from %s dropped: not accepting new connections\n", addr.ToString());
+        CloseSocket(hSocket);
+        return;
+    }
+
     if (!IsSelectableSocket(hSocket))
     {
         LogPrintf("connection from %s dropped: non-selectable socket\n", addr.ToString());
@@ -1784,6 +1790,9 @@ bool CConnman::OpenNetworkConnection(const CAddress& addrConnect, bool fCountFai
     // Initiate outbound network connection
     //
     boost::this_thread::interruption_point();
+    if (!fNetworkActive) {
+        return false;
+    }
     if (!pszDest) {
         if (IsLocal(addrConnect) ||
             FindNode((CNetAddr)addrConnect) || IsBanned(addrConnect) ||
@@ -2025,8 +2034,30 @@ void Discover(boost::thread_group& threadGroup)
 #endif
 }
 
+void CConnman::SetNetworkActive(bool active)
+{
+    if (fDebug) {
+        LogPrint("net", "SetNetworkActive: %s\n", active);
+    }
+
+    if (!active) {
+        fNetworkActive = false;
+
+        LOCK(cs_vNodes);
+        // Close sockets to all nodes
+        BOOST_FOREACH(CNode* pnode, vNodes) {
+            pnode->CloseSocketDisconnect();
+        }
+    } else {
+        fNetworkActive = true;
+    }
+
+    uiInterface.NotifyNetworkActiveChanged(fNetworkActive);
+}
+
 CConnman::CConnman(uint64_t nSeed0In, uint64_t nSeed1In) : nSeed0(nSeed0In), nSeed1(nSeed1In)
 {
+    fNetworkActive = true;
     setBannedIsDirty = false;
     fAddressesInitialized = false;
     nLastNodeId = 0;