25 files changed, 398 insertions, 31 deletions
diff --git a/contrib/debian/copyright b/contrib/debian/copyright
index 5cac6e533c..0fa06f1aa9 100644
--- a/contrib/debian/copyright
+++ b/contrib/debian/copyright
@@ -47,7 +47,10 @@ Comment: Site: https://github.com/stephenhutchings/typicons.font
 
 Files: src/qt/res/icons/connect*.png
        src/qt/res/src/connect-*.svg
+       src/qt/res/icons/network_disabled.png
+       src/qt/res/src/network_disabled.svg
 Copyright: Marco Falke
+           Luke Dashjr
 License: Expat
 Comment: Inspired by Stephan Hutchings Typicons
 
diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk
index 985649619f..4e58bec74e 100644
--- a/depends/hosts/darwin.mk
+++ b/depends/hosts/darwin.mk
@@ -1,4 +1,4 @@
-OSX_MIN_VERSION=10.7
+OSX_MIN_VERSION=10.8
 OSX_SDK_VERSION=10.11
 OSX_SDK=$(SDK_PATH)/MacOSX$(OSX_SDK_VERSION).sdk
 LD64_VERSION=253.9
diff --git a/qa/rpc-tests/p2p-compactblocks.py b/qa/rpc-tests/p2p-compactblocks.py
index 6d1fb3fd9a..1b4c8d90e7 100755
--- a/qa/rpc-tests/p2p-compactblocks.py
+++ b/qa/rpc-tests/p2p-compactblocks.py
@@ -300,8 +300,8 @@ class CompactBlocksTest(BitcoinTestFramework):
             assert(segwit_tx_generated) # check that our test is not broken
 
         # Wait until we've seen the block announcement for the resulting tip
-        tip = int(self.nodes[0].getbestblockhash(), 16)
-        assert(self.test_node.wait_for_block_announcement(tip))
+        tip = int(node.getbestblockhash(), 16)
+        assert(test_node.wait_for_block_announcement(tip))
 
         # Now mine a block, and look at the resulting compact block.
         test_node.clear_block_announcement()
@@ -589,8 +589,8 @@ class CompactBlocksTest(BitcoinTestFramework):
         assert_equal(int(node.getbestblockhash(), 16), block.sha256)
 
     def test_getblocktxn_handler(self, node, test_node, version):
-        # bitcoind won't respond for blocks whose height is more than 15 blocks
-        # deep.
+        # bitcoind will not send blocktxn responses for blocks whose height is
+        # more than 10 blocks deep.
         MAX_GETBLOCKTXN_DEPTH = 10
         chain_height = node.getblockcount()
         current_height = chain_height
@@ -623,11 +623,17 @@ class CompactBlocksTest(BitcoinTestFramework):
                 test_node.last_blocktxn = None
             current_height -= 1
 
-        # Next request should be ignored, as we're past the allowed depth.
+        # Next request should send a full block response, as we're past the
+        # allowed depth for a blocktxn response.
         block_hash = node.getblockhash(current_height)
         msg.block_txn_request = BlockTransactionsRequest(int(block_hash, 16), [0])
+        with mininode_lock:
+            test_node.last_block = None
+            test_node.last_blocktxn = None
         test_node.send_and_ping(msg)
         with mininode_lock:
+            test_node.last_block.block.calc_sha256()
+            assert_equal(test_node.last_block.block.sha256, int(block_hash, 16))
             assert_equal(test_node.last_blocktxn, None)
 
     def test_compactblocks_not_at_tip(self, node, test_node):
@@ -648,6 +654,8 @@ class CompactBlocksTest(BitcoinTestFramework):
         node.generate(1)
         wait_until(test_node.received_block_announcement, timeout=30)
         test_node.clear_block_announcement()
+        with mininode_lock:
+            test_node.last_block = None
         test_node.send_message(msg_getdata([CInv(4, int(new_blocks[0], 16))]))
         success = wait_until(lambda: test_node.last_block is not None, timeout=30)
         assert(success)
diff --git a/src/Makefile.bench.include b/src/Makefile.bench.include
index 9760ad089c..840d33c1b5 100644
--- a/src/Makefile.bench.include
+++ b/src/Makefile.bench.include
@@ -6,11 +6,15 @@ bin_PROGRAMS += bench/bench_bitcoin
 BENCH_SRCDIR = bench
 BENCH_BINARY = bench/bench_bitcoin$(EXEEXT)
 
+RAW_TEST_FILES = \
+  bench/data/block413567.raw
+GENERATED_TEST_FILES = $(RAW_TEST_FILES:.raw=.raw.h)
 
 bench_bench_bitcoin_SOURCES = \
   bench/bench_bitcoin.cpp \
   bench/bench.cpp \
   bench/bench.h \
+  bench/checkblock.cpp \
   bench/Examples.cpp \
   bench/rollingbloom.cpp \
   bench/crypto_hash.cpp \
@@ -20,6 +24,8 @@ bench_bench_bitcoin_SOURCES = \
   bench/base58.cpp \
   bench/lockedpool.cpp
 
+nodist_bench_bench_bitcoin_SOURCES = $(GENERATED_TEST_FILES)
+
 bench_bench_bitcoin_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) $(EVENT_CLFAGS) $(EVENT_PTHREADS_CFLAGS) -I$(builddir)/bench/
 bench_bench_bitcoin_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS)
 bench_bench_bitcoin_LDADD = \
@@ -45,10 +51,12 @@ endif
 bench_bench_bitcoin_LDADD += $(BOOST_LIBS) $(BDB_LIBS) $(SSL_LIBS) $(CRYPTO_LIBS) $(MINIUPNPC_LIBS) $(EVENT_PTHREADS_LIBS) $(EVENT_LIBS)
 bench_bench_bitcoin_LDFLAGS = $(RELDFLAGS) $(AM_LDFLAGS) $(LIBTOOL_APP_LDFLAGS)
 
-CLEAN_BITCOIN_BENCH = bench/*.gcda bench/*.gcno
+CLEAN_BITCOIN_BENCH = bench/*.gcda bench/*.gcno $(GENERATED_TEST_FILES)
 
 CLEANFILES += $(CLEAN_BITCOIN_BENCH)
 
+bench/checkblock.cpp: bench/data/block413567.raw.h
+
 bitcoin_bench: $(BENCH_BINARY)
 
 bench: $(BENCH_BINARY) FORCE
@@ -56,3 +64,10 @@ bench: $(BENCH_BINARY) FORCE
 
 bitcoin_bench_clean : FORCE
 	rm -f $(CLEAN_BITCOIN_BENCH) $(bench_bench_bitcoin_OBJECTS) $(BENCH_BINARY)
+
+%.raw.h: %.raw
+	@$(MKDIR_P) $(@D)
+	@echo "static unsigned const char $(*F)[] = {" >> $@
+	@$(HEXDUMP) -v -e '8/1 "0x%02x, "' -e '"\n"' $< | $(SED) -e 's/0x  ,//g' >> $@
+	@echo "};" >> $@
+	@echo "Generated $@"
diff --git a/src/Makefile.qt.include b/src/Makefile.qt.include
index 1f9a901d75..48abb9b4a2 100644
--- a/src/Makefile.qt.include
+++ b/src/Makefile.qt.include
@@ -271,6 +271,7 @@ RES_ICONS = \
   qt/res/icons/key.png \
   qt/res/icons/lock_closed.png \
   qt/res/icons/lock_open.png \
+  qt/res/icons/network_disabled.png \
   qt/res/icons/open.png \
   qt/res/icons/overview.png \
   qt/res/icons/quit.png \
diff --git a/src/bench/checkblock.cpp b/src/bench/checkblock.cpp
new file mode 100644
index 0000000000..bb596ce7f9
--- /dev/null
+++ b/src/bench/checkblock.cpp
@@ -0,0 +1,55 @@
+// Copyright (c) 2016 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "bench.h"
+
+#include "chainparams.h"
+#include "main.h"
+#include "consensus/validation.h"
+
+namespace block_bench {
+#include "bench/data/block413567.raw.h"
+}
+
+// These are the two major time-sinks which happen after we have fully received
+// a block off the wire, but before we can relay the block on to peers using
+// compact block relay.
+
+static void DeserializeBlockTest(benchmark::State& state)
+{
+    CDataStream stream((const char*)block_bench::block413567,
+            (const char*)&block_bench::block413567[sizeof(block_bench::block413567)],
+            SER_NETWORK, PROTOCOL_VERSION);
+    char a;
+    stream.write(&a, 1); // Prevent compaction
+
+    while (state.KeepRunning()) {
+        CBlock block;
+        stream >> block;
+        assert(stream.Rewind(sizeof(block_bench::block413567)));
+    }
+}
+
+static void DeserializeAndCheckBlockTest(benchmark::State& state)
+{
+    CDataStream stream((const char*)block_bench::block413567,
+            (const char*)&block_bench::block413567[sizeof(block_bench::block413567)],
+            SER_NETWORK, PROTOCOL_VERSION);
+    char a;
+    stream.write(&a, 1); // Prevent compaction
+
+    Consensus::Params params = Params(CBaseChainParams::MAIN).GetConsensus();
+
+    while (state.KeepRunning()) {
+        CBlock block; // Note that CBlock caches its checked state, so we need to recreate it here
+        stream >> block;
+        assert(stream.Rewind(sizeof(block_bench::block413567)));
+
+        CValidationState state;
+        assert(CheckBlock(block, state, params));
+    }
+}
+
+BENCHMARK(DeserializeBlockTest);
+BENCHMARK(DeserializeAndCheckBlockTest);
diff --git a/src/bench/data/block413567.raw b/src/bench/data/block413567.raw
new file mode 100644
index 0000000000..67d2d5d382
--- /dev/null
+++ b/src/bench/data/block413567.raw
diff --git a/src/main.cpp b/src/main.cpp
index 14bdd824e9..e868e3c5f9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1104,7 +1104,7 @@ int64_t GetTransactionSigOpCost(const CTransaction& tx, const CCoinsViewCache& i
 
 
 
-bool CheckTransaction(const CTransaction& tx, CValidationState &state)
+bool CheckTransaction(const CTransaction& tx, CValidationState &state, bool fCheckDuplicateInputs)
 {
     // Basic checks that don't depend on any context
     if (tx.vin.empty())
@@ -1128,13 +1128,14 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state)
             return state.DoS(100, false, REJECT_INVALID, "bad-txns-txouttotal-toolarge");
     }
 
-    // Check for duplicate inputs
-    set<COutPoint> vInOutPoints;
-    for (const auto& txin : tx.vin)
-    {
-        if (vInOutPoints.count(txin.prevout))
-            return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputs-duplicate");
-        vInOutPoints.insert(txin.prevout);
+    // Check for duplicate inputs - note that this check is slow so we skip it in CheckBlock
+    if (fCheckDuplicateInputs) {
+        set<COutPoint> vInOutPoints;
+        for (const auto& txin : tx.vin)
+        {
+            if (!vInOutPoints.insert(txin.prevout).second)
+                return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputs-duplicate");
+        }
     }
 
     if (tx.IsCoinBase())
@@ -3461,7 +3462,7 @@ bool CheckBlock(const CBlock& block, CValidationState& state, const Consensus::P
 
     // Check transactions
     for (const auto& tx : block.vtx)
-        if (!CheckTransaction(tx, state))
+        if (!CheckTransaction(tx, state, false))
             return state.Invalid(false, state.GetRejectCode(), state.GetRejectReason(),
                                  strprintf("Transaction check failed (tx hash %s) %s", tx.GetHash().ToString(), state.GetDebugMessage()));
 
@@ -5494,7 +5495,19 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         }
 
         if (it->second->nHeight < chainActive.Height() - MAX_BLOCKTXN_DEPTH) {
+            // If an older block is requested (should never happen in practice,
+            // but can happen in tests) send a block response instead of a
+            // blocktxn response. Sending a full block response instead of a
+            // small blocktxn response is preferable in the case where a peer
+            // might maliciously send lots of getblocktxn requests to trigger
+            // expensive disk reads, because it will require the peer to
+            // actually receive all the data read from disk over the network.
             LogPrint("net", "Peer %d sent us a getblocktxn for a block > %i deep", pfrom->id, MAX_BLOCKTXN_DEPTH);
+            CInv vInv;
+            vInv.type = State(pfrom->GetId())->fWantsCmpctWitness ? MSG_WITNESS_BLOCK : MSG_BLOCK;
+            vInv.hash = req.blockhash;
+            pfrom->vRecvGetData.push_back(vInv);
+            ProcessGetData(pfrom, chainparams.GetConsensus(), connman);
             return true;
         }
 
diff --git a/src/main.h b/src/main.h
index 9343330587..21829b6c25 100644
--- a/src/main.h
+++ b/src/main.h
@@ -343,7 +343,7 @@ void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, int nHeight);
 /** Transaction validation functions */
 
 /** Context-independent validity checks */
-bool CheckTransaction(const CTransaction& tx, CValidationState& state);
+bool CheckTransaction(const CTransaction& tx, CValidationState& state, bool fCheckDuplicateInputs=true);
 
 namespace Consensus {
 
diff --git a/src/net.cpp b/src/net.cpp
index e47a8bb168..15c4514f15 100644
--- a/src/net.cpp
+++ b/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;
diff --git a/src/net.h b/src/net.h
index 25d9bbc02b..e2d88b478d 100644
--- a/src/net.h
+++ b/src/net.h
@@ -131,6 +131,8 @@ public:
     bool Start(boost::thread_group& threadGroup, CScheduler& scheduler, std::string& strNodeError, Options options);
     void Stop();
     bool BindListenPort(const CService &bindAddr, std::string& strError, bool fWhitelisted = false);
+    bool GetNetworkActive() const { return fNetworkActive; };
+    void SetNetworkActive(bool active);
     bool OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound = NULL, const char *strDest = NULL, bool fOneShot = false, bool fFeeler = false);
     bool CheckIncomingNonce(uint64_t nonce);
 
@@ -401,6 +403,7 @@ private:
     unsigned int nReceiveFloodSize;
 
     std::vector<ListenSocket> vhListenSocket;
+    bool fNetworkActive;
     banmap_t setBanned;
     CCriticalSection cs_setBanned;
     bool setBannedIsDirty;
diff --git a/src/protocol.cpp b/src/protocol.cpp
index 54ad62b1a2..87d6e06848 100644
--- a/src/protocol.cpp
+++ b/src/protocol.cpp
@@ -181,7 +181,11 @@ std::string CInv::GetCommand() const
 
 std::string CInv::ToString() const
 {
-    return strprintf("%s %s", GetCommand(), hash.ToString());
+    try {
+        return strprintf("%s %s", GetCommand(), hash.ToString());
+    } catch(const std::out_of_range &) {
+        return strprintf("0x%08x %s", type, hash.ToString());
+    }
 }
 
 const std::vector<std::string> &getAllNetMessageTypes()
diff --git a/src/qt/bitcoin.qrc b/src/qt/bitcoin.qrc
index ca5b1fa673..451d391237 100644
--- a/src/qt/bitcoin.qrc
+++ b/src/qt/bitcoin.qrc
@@ -52,6 +52,7 @@
         <file alias="transaction_abandoned">res/icons/transaction_abandoned.png</file>
         <file alias="hd_enabled">res/icons/hd_enabled.png</file>
         <file alias="hd_disabled">res/icons/hd_disabled.png</file>
+        <file alias="network_disabled">res/icons/network_disabled.png</file>
     </qresource>
     <qresource prefix="/movies">
         <file alias="spinner-000">res/movies/spinner-000.png</file>
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index ee5102c4f9..b2c9a704ed 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -86,7 +86,7 @@ BitcoinGUI::BitcoinGUI(const PlatformStyle *_platformStyle, const NetworkStyle *
     unitDisplayControl(0),
     labelWalletEncryptionIcon(0),
     labelWalletHDStatusIcon(0),
-    labelConnectionsIcon(0),
+    connectionsControl(0),
     labelBlocksIcon(0),
     progressBarLabel(0),
     progressBar(0),
@@ -199,7 +199,7 @@ BitcoinGUI::BitcoinGUI(const PlatformStyle *_platformStyle, const NetworkStyle *
     unitDisplayControl = new UnitDisplayStatusBarControl(platformStyle);
     labelWalletEncryptionIcon = new QLabel();
     labelWalletHDStatusIcon = new QLabel();
-    labelConnectionsIcon = new QLabel();
+    connectionsControl = new NetworkToggleStatusBarControl();
     labelBlocksIcon = new QLabel();
     if(enableWallet)
     {
@@ -210,7 +210,7 @@ BitcoinGUI::BitcoinGUI(const PlatformStyle *_platformStyle, const NetworkStyle *
         frameBlocksLayout->addWidget(labelWalletHDStatusIcon);
     }
     frameBlocksLayout->addStretch();
-    frameBlocksLayout->addWidget(labelConnectionsIcon);
+    frameBlocksLayout->addWidget(connectionsControl);
     frameBlocksLayout->addStretch();
     frameBlocksLayout->addWidget(labelBlocksIcon);
     frameBlocksLayout->addStretch();
@@ -469,8 +469,9 @@ void BitcoinGUI::setClientModel(ClientModel *_clientModel)
         createTrayIconMenu();
 
         // Keep up to date with client
-        setNumConnections(_clientModel->getNumConnections());
+        updateNetworkState();
         connect(_clientModel, SIGNAL(numConnectionsChanged(int)), this, SLOT(setNumConnections(int)));
+        connect(_clientModel, SIGNAL(networkActiveChanged(bool)), this, SLOT(setNetworkActive(bool)));
 
         setNumBlocks(_clientModel->getNumBlocks(), _clientModel->getLastBlockDate(), _clientModel->getVerificationProgress(NULL), false);
         connect(_clientModel, SIGNAL(numBlocksChanged(int,QDateTime,double,bool)), this, SLOT(setNumBlocks(int,QDateTime,double,bool)));
@@ -489,6 +490,7 @@ void BitcoinGUI::setClientModel(ClientModel *_clientModel)
         }
 #endif // ENABLE_WALLET
         unitDisplayControl->setOptionsModel(_clientModel->getOptionsModel());
+        connectionsControl->setClientModel(_clientModel);
         
         OptionsModel* optionsModel = _clientModel->getOptionsModel();
         if(optionsModel)
@@ -698,8 +700,9 @@ void BitcoinGUI::gotoVerifyMessageTab(QString addr)
 }
 #endif // ENABLE_WALLET
 
-void BitcoinGUI::setNumConnections(int count)
+void BitcoinGUI::updateNetworkState()
 {
+    int count = clientModel->getNumConnections();
     QString icon;
     switch(count)
     {
@@ -709,8 +712,25 @@ void BitcoinGUI::setNumConnections(int count)
     case 7: case 8: case 9: icon = ":/icons/connect_3"; break;
     default: icon = ":/icons/connect_4"; break;
     }
-    labelConnectionsIcon->setPixmap(platformStyle->SingleColorIcon(icon).pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
-    labelConnectionsIcon->setToolTip(tr("%n active connection(s) to Bitcoin network", "", count));
+
+    if (clientModel->getNetworkActive()) {
+        connectionsControl->setToolTip(tr("%n active connection(s) to Bitcoin network", "", count));
+    } else {
+        connectionsControl->setToolTip(tr("Network activity disabled"));
+        icon = ":/icons/network_disabled";
+    }
+
+    connectionsControl->setPixmap(platformStyle->SingleColorIcon(icon).pixmap(STATUSBAR_ICONSIZE,STATUSBAR_ICONSIZE));
+}
+
+void BitcoinGUI::setNumConnections(int count)
+{
+    updateNetworkState();
+}
+
+void BitcoinGUI::setNetworkActive(bool networkActive)
+{
+    updateNetworkState();
 }
 
 void BitcoinGUI::setNumBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, bool header)
@@ -1211,3 +1231,18 @@ void UnitDisplayStatusBarControl::onMenuSelection(QAction* action)
         optionsModel->setDisplayUnit(action->data());
     }
 }
+
+void NetworkToggleStatusBarControl::mousePressEvent(QMouseEvent *event)
+{
+    if (clientModel) {
+        clientModel->setNetworkActive(!clientModel->getNetworkActive());
+    }
+}
+
+/** Lets the control know about the Client Model */
+void NetworkToggleStatusBarControl::setClientModel(ClientModel *_clientModel)
+{
+    if (_clientModel) {
+        this->clientModel = _clientModel;
+    }
+}
diff --git a/src/qt/bitcoingui.h b/src/qt/bitcoingui.h
index 0eaa44b263..1b02e77fc4 100644
--- a/src/qt/bitcoingui.h
+++ b/src/qt/bitcoingui.h
@@ -26,6 +26,7 @@ class PlatformStyle;
 class RPCConsole;
 class SendCoinsRecipient;
 class UnitDisplayStatusBarControl;
+class NetworkToggleStatusBarControl;
 class WalletFrame;
 class WalletModel;
 class HelpMessageDialog;
@@ -85,7 +86,7 @@ private:
     UnitDisplayStatusBarControl *unitDisplayControl;
     QLabel *labelWalletEncryptionIcon;
     QLabel *labelWalletHDStatusIcon;
-    QLabel *labelConnectionsIcon;
+    NetworkToggleStatusBarControl *connectionsControl;
     QLabel *labelBlocksIcon;
     QLabel *progressBarLabel;
     QProgressBar *progressBar;
@@ -146,6 +147,9 @@ private:
     /** Disconnect core signals from GUI client */
     void unsubscribeFromCoreSignals();
 
+    /** Update UI with latest network info from model. */
+    void updateNetworkState();
+
 Q_SIGNALS:
     /** Signal raised when a URI was entered or dragged to the GUI */
     void receivedURI(const QString &uri);
@@ -153,6 +157,8 @@ Q_SIGNALS:
 public Q_SLOTS:
     /** Set number of connections shown in the UI */
     void setNumConnections(int count);
+    /** Set network state shown in the UI */
+    void setNetworkActive(bool networkActive);
     /** Set number of blocks and last block date shown in the UI */
     void setNumBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, bool headers);
 
@@ -264,4 +270,17 @@ private Q_SLOTS:
     void onMenuSelection(QAction* action);
 };
 
+class NetworkToggleStatusBarControl : public QLabel
+{
+    Q_OBJECT
+    
+public:
+    void setClientModel(ClientModel *clientModel);
+protected:
+    void mousePressEvent(QMouseEvent *event);
+    
+private:
+    ClientModel *clientModel;
+};
+
 #endif // BITCOIN_QT_BITCOINGUI_H
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index f9caca6878..a4bb2f77fe 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -145,6 +145,11 @@ void ClientModel::updateNumConnections(int numConnections)
     Q_EMIT numConnectionsChanged(numConnections);
 }
 
+void ClientModel::updateNetworkActive(bool networkActive)
+{
+    Q_EMIT networkActiveChanged(networkActive);
+}
+
 void ClientModel::updateAlert()
 {
     Q_EMIT alertsChanged(getStatusBarWarnings());
@@ -167,6 +172,21 @@ enum BlockSource ClientModel::getBlockSource() const
     return BLOCK_SOURCE_NONE;
 }
 
+void ClientModel::setNetworkActive(bool active)
+{
+    if (g_connman) {
+         g_connman->SetNetworkActive(active);
+    }
+}
+
+bool ClientModel::getNetworkActive() const
+{
+    if (g_connman) {
+        return g_connman->GetNetworkActive();
+    }
+    return false;
+}
+
 QString ClientModel::getStatusBarWarnings() const
 {
     return QString::fromStdString(GetWarnings("gui"));
@@ -233,6 +253,12 @@ static void NotifyNumConnectionsChanged(ClientModel *clientmodel, int newNumConn
                               Q_ARG(int, newNumConnections));
 }
 
+static void NotifyNetworkActiveChanged(ClientModel *clientmodel, bool networkActive)
+{
+    QMetaObject::invokeMethod(clientmodel, "updateNetworkActive", Qt::QueuedConnection,
+                              Q_ARG(bool, networkActive));
+}
+
 static void NotifyAlertChanged(ClientModel *clientmodel)
 {
     qDebug() << "NotifyAlertChanged";
@@ -273,6 +299,7 @@ void ClientModel::subscribeToCoreSignals()
     // Connect signals to client
     uiInterface.ShowProgress.connect(boost::bind(ShowProgress, this, _1, _2));
     uiInterface.NotifyNumConnectionsChanged.connect(boost::bind(NotifyNumConnectionsChanged, this, _1));
+    uiInterface.NotifyNetworkActiveChanged.connect(boost::bind(NotifyNetworkActiveChanged, this, _1));
     uiInterface.NotifyAlertChanged.connect(boost::bind(NotifyAlertChanged, this));
     uiInterface.BannedListChanged.connect(boost::bind(BannedListChanged, this));
     uiInterface.NotifyBlockTip.connect(boost::bind(BlockTipChanged, this, _1, _2, false));
@@ -284,6 +311,7 @@ void ClientModel::unsubscribeFromCoreSignals()
     // Disconnect signals from client
     uiInterface.ShowProgress.disconnect(boost::bind(ShowProgress, this, _1, _2));
     uiInterface.NotifyNumConnectionsChanged.disconnect(boost::bind(NotifyNumConnectionsChanged, this, _1));
+    uiInterface.NotifyNetworkActiveChanged.disconnect(boost::bind(NotifyNetworkActiveChanged, this, _1));
     uiInterface.NotifyAlertChanged.disconnect(boost::bind(NotifyAlertChanged, this));
     uiInterface.BannedListChanged.disconnect(boost::bind(BannedListChanged, this));
     uiInterface.NotifyBlockTip.disconnect(boost::bind(BlockTipChanged, this, _1, _2, false));
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 3fd8404cbb..a641401425 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -68,6 +68,10 @@ public:
     bool inInitialBlockDownload() const;
     //! Return true if core is importing blocks
     enum BlockSource getBlockSource() const;
+    //! Return true if network activity in core is enabled
+    bool getNetworkActive() const;
+    //! Toggle network activity state in core
+    void setNetworkActive(bool active);
     //! Return warnings to be displayed in status bar
     QString getStatusBarWarnings() const;
 
@@ -91,6 +95,7 @@ Q_SIGNALS:
     void numConnectionsChanged(int count);
     void numBlocksChanged(int count, const QDateTime& blockDate, double nVerificationProgress, bool header);
     void mempoolSizeChanged(long count, size_t mempoolSizeInBytes);
+    void networkActiveChanged(bool networkActive);
     void alertsChanged(const QString &warnings);
     void bytesChanged(quint64 totalBytesIn, quint64 totalBytesOut);
 
@@ -103,6 +108,7 @@ Q_SIGNALS:
 public Q_SLOTS:
     void updateTimer();
     void updateNumConnections(int numConnections);
+    void updateNetworkActive(bool networkActive);
     void updateAlert();
     void updateBanlist();
 };
diff --git a/src/qt/res/icons/network_disabled.png b/src/qt/res/icons/network_disabled.png
new file mode 100644
index 0000000000..49f728693d
--- /dev/null
+++ b/src/qt/res/icons/network_disabled.png
diff --git a/src/qt/res/src/network_disabled.svg b/src/qt/res/src/network_disabled.svg
new file mode 100644
index 0000000000..e95a5eb5bb
--- /dev/null
+++ b/src/qt/res/src/network_disabled.svg
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   id="svg2"
+   viewBox="0 0 24 24"
+   height="24"
+   width="24"
+   version="1.2">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8" />
+  <g
+     id="g4142"
+     transform="matrix(0,-1,-1,0,23.96,24)">
+    <g
+       id="g4210"
+       transform="matrix(-1,0,0,1,59.86,-106.6)">
+      <g
+         id="g4289"
+         transform="matrix(-1,0,0,1,-16.98,0.8136)">
+        <g
+           id="g4291">
+          <path
+             id="path4293"
+             d="m -65.35,116.3 0,3 0.5,0 c 0.54,0 1,0.5 1,1 l 0,2.6 c -1.15,0.5 -2,1.6 -2,3 0,2 1.59,3.5 3.5,3.5 1.91,0 3.5,-1.5 3.5,-3.5 0,-1.4 -0.85,-2.5 -2,-3 l 0,-2.6 c 0,-2.3 -1.81,-4 -4,-4 z m 1,1.2 c 1.39,0.3 2.5,1.3 2.5,2.8 l 0,3.2 0.34,0.1 c 0.96,0.3 1.66,1.2 1.66,2.3 0,1.4 -1.11,2.5 -2.5,2.5 -1.39,0 -2.5,-1.1 -2.5,-2.5 0,-1.1 0.69,-2 1.66,-2.3 l 0.34,-0.1 0,-3.2 c 0,-0.9 -0.67,-1.5 -1.5,-1.8 z"
+             style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;baseline-shift:baseline;text-anchor:start;white-space:normal;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate" />
+          <g
+             style="fill:#969696;fill-opacity:1"
+             id="g4295">
+            <path
+               id="path4297"
+               d="m -67.35,106.1 c -1.94,0 -3.5,1.6 -3.5,3.5 0,1.4 0.85,2.5 2,3 l 0,2.7 c 0,2.2 1.79,4 4,4 l 0.5,0 0,-0.5 0,-2.5 -0.5,0 c -0.55,0 -1,-0.5 -1,-1 l 0,-2.7 c 1.15,-0.5 2,-1.6 2,-3 0,-1.9 -1.57,-3.5 -3.5,-3.5 z m 0,1 c 1.37,0 2.5,1.2 2.5,2.5 0,1.1 -0.7,2 -1.66,2.3 l -0.34,0.1 0,3.3 c 0,0.9 0.67,1.5 1.5,1.8 l 0,1 c -1.38,-0.3 -2.5,-1.4 -2.5,-2.8 l 0,-3.3 -0.34,-0.1 c -0.96,-0.3 -1.66,-1.2 -1.66,-2.3 0,-1.3 1.12,-2.5 2.5,-2.5 z"
+               style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;baseline-shift:baseline;text-anchor:start;white-space:normal;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate" />
+            <path
+               id="path4299"
+               d="m -57.35,106.1 c -1.93,0 -3.5,1.6 -3.5,3.5 0,1.4 0.85,2.5 2,3 l 0,2.7 c 0,0.5 -0.45,1 -1,1 l -4.85,0 3.17,3 1.68,0 c 2.21,0 4,-1.8 4,-4 l 0,-2.7 c 1.15,-0.5 2,-1.6 2,-3 0,-1.9 -1.56,-3.5 -3.5,-3.5 z m 0,1 c 1.38,0 2.5,1.2 2.5,2.5 0,1.1 -0.7,2 -1.66,2.3 l -0.34,0.1 0,3.3 c 0,1.6 -1.35,3 -3,3 l -1.81,0 -2.04,-1 3.85,0 c 1.11,0 2,-0.9 2,-2 l 0,-3.3 -0.34,-0.1 c -0.96,-0.3 -1.66,-1.2 -1.66,-2.3 0,-1.3 1.13,-2.5 2.5,-2.5 z"
+               style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;baseline-shift:baseline;text-anchor:start;white-space:normal;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate" />
+          </g>
+          <path
+             id="path4301"
+             d="m -69.84,116.3 c -2.19,0 -4,1.7 -4,4 l 0,2.6 c -1.14,0.6 -1.99,1.6 -1.99,3 0,2 1.6,3.5 3.51,3.5 1.91,0 3.5,-1.5 3.5,-3.5 0,-1.4 -0.85,-2.5 -2,-3 l 0,-2.6 c 0,-0.5 0.45,-1 1,-1 l 5.01,0 -3.36,-3 z m 0,1 1.84,0 2.19,1 -4.01,0 c -1.11,0 -2,0.9 -2,2 l 0,3.2 0.34,0.1 c 0.96,0.3 1.66,1.2 1.66,2.3 0,1.4 -1.11,2.5 -2.5,2.5 -1.39,0 -2.51,-1.1 -2.51,-2.5 0,-1.1 0.7,-2 1.66,-2.3 l 0.33,-0.1 0,-0.4 0,-2.8 c 0,-1.7 1.33,-3 3,-3 z"
+             style="color:#000000;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:medium;line-height:normal;font-family:sans-serif;text-indent:0;text-align:start;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;block-progression:tb;writing-mode:lr-tb;baseline-shift:baseline;text-anchor:start;white-space:normal;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:1;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate" />
+        </g>
+      </g>
+    </g>
+    <path
+       id="path4165"
+       d="m 12,8.77 c -0.84,0 -1.66,0.341 -2.254,0.937 -0.599,0.593 -0.942,1.403 -0.945,2.253 0,0.85 0.337,1.67 0.933,2.26 a 0.6001,0.6001 0 0 0 0,0 c 0.594,0.6 1.424,0.94 2.264,0.94 0.84,0 1.67,-0.34 2.26,-0.94 0.6,-0.59 0.94,-1.41 0.94,-2.26 0,-0.84 -0.34,-1.66 -0.95,-2.253 C 13.66,9.111 12.84,8.77 12,8.77 Z"
+       style="opacity:1;fill:#000000;fill-opacity:1;stroke:none;stroke-width:10;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
+  </g>
+  <path d="M 3,3 l 18,18" style="stroke-width: 3; stroke: #000000; stroke-linecap: round;" />
+  <path d="M 21,3 l -18,18" style="stroke-width: 3; stroke: #000000; stroke-linecap: round;" />
+</svg>
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index a9fef731e1..47af6a5724 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -458,6 +458,9 @@ void RPCConsole::setClientModel(ClientModel *model)
         setNumBlocks(model->getNumBlocks(), model->getLastBlockDate(), model->getVerificationProgress(NULL), false);
         connect(model, SIGNAL(numBlocksChanged(int,QDateTime,double,bool)), this, SLOT(setNumBlocks(int,QDateTime,double,bool)));
 
+        updateNetworkState();
+        connect(model, SIGNAL(networkActiveChanged(bool)), this, SLOT(setNetworkActive(bool)));
+
         updateTrafficStats(model->getTotalBytesRecv(), model->getTotalBytesSent());
         connect(model, SIGNAL(bytesChanged(quint64,quint64)), this, SLOT(updateTrafficStats(quint64, quint64)));
 
@@ -674,16 +677,30 @@ void RPCConsole::message(int category, const QString &message, bool html)
     ui->messagesWidget->append(out);
 }
 
+void RPCConsole::updateNetworkState()
+{
+    QString connections = QString::number(clientModel->getNumConnections()) + " (";
+    connections += tr("In:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_IN)) + " / ";
+    connections += tr("Out:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_OUT)) + ")";
+
+    if(!clientModel->getNetworkActive()) {
+        connections += " (" + tr("Network activity disabled") + ")";
+    }
+
+    ui->numberOfConnections->setText(connections);
+}
+
 void RPCConsole::setNumConnections(int count)
 {
     if (!clientModel)
         return;
 
-    QString connections = QString::number(count) + " (";
-    connections += tr("In:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_IN)) + " / ";
-    connections += tr("Out:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_OUT)) + ")";
+    updateNetworkState();
+}
 
-    ui->numberOfConnections->setText(connections);
+void RPCConsole::setNetworkActive(bool networkActive)
+{
+    updateNetworkState();
 }
 
 void RPCConsole::setNumBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, bool headers)
@@ -1069,3 +1086,8 @@ void RPCConsole::setTabFocus(enum TabTypes tabType)
 {
     ui->tabWidget->setCurrentIndex(tabType);
 }
+
+void RPCConsole::on_toggleNetworkActiveButton_clicked()
+{
+    clientModel->setNetworkActive(!clientModel->getNetworkActive());
+}
diff --git a/src/qt/rpcconsole.h b/src/qt/rpcconsole.h
index 8e1d878ae5..8c20379a8c 100644
--- a/src/qt/rpcconsole.h
+++ b/src/qt/rpcconsole.h
@@ -61,6 +61,8 @@ protected:
 private Q_SLOTS:
     void on_lineEdit_returnPressed();
     void on_tabWidget_currentChanged(int index);
+    /** toggle network activity */
+    void on_toggleNetworkActiveButton_clicked();
     /** open the debug.log from the current datadir */
     void on_openDebugLogfileButton_clicked();
     /** change the time range of the network traffic graph */
@@ -88,6 +90,8 @@ public Q_SLOTS:
     void message(int category, const QString &message, bool html = false);
     /** Set number of connections shown in the UI */
     void setNumConnections(int count);
+    /** Set network state shown in the UI */
+    void setNetworkActive(bool networkActive);
     /** Set number of blocks and last block date shown in the UI */
     void setNumBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, bool headers);
     /** Set size (number of transactions and memory usage) of the mempool in the UI */
@@ -144,6 +148,9 @@ private:
     QMenu *banTableContextMenu;
     int consoleFontSize;
     QCompleter *autoCompleter;
+
+    /** Update UI with latest network info from model. */
+    void updateNetworkState();
 };
 
 #endif // BITCOIN_QT_RPCCONSOLE_H
diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp
index 8370a0f43e..03992a278d 100644
--- a/src/rpc/client.cpp
+++ b/src/rpc/client.cpp
@@ -109,6 +109,7 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "prioritisetransaction", 2 },
     { "setban", 2 },
     { "setban", 3 },
+    { "setnetworkactive", 0 },
     { "getmempoolancestors", 1 },
     { "getmempooldescendants", 1 },
 };
diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index bd68abdbb8..f57ba76d3a 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -401,6 +401,7 @@ UniValue getnetworkinfo(const JSONRPCRequest& request)
             "  \"localrelay\": true|false,              (bool) true if transaction relay is requested from peers\n"
             "  \"timeoffset\": xxxxx,                   (numeric) the time offset\n"
             "  \"connections\": xxxxx,                  (numeric) the number of connections\n"
+            "  \"networkactive\": true|false,           (bool) whether p2p networking is enabled\n"
             "  \"networks\": [                          (array) information per network\n"
             "  {\n"
             "    \"name\": \"xxx\",                     (string) network (ipv4, ipv6 or onion)\n"
@@ -435,8 +436,10 @@ UniValue getnetworkinfo(const JSONRPCRequest& request)
         obj.push_back(Pair("localservices", strprintf("%016x", g_connman->GetLocalServices())));
     obj.push_back(Pair("localrelay",     fRelayTxes));
     obj.push_back(Pair("timeoffset",    GetTimeOffset()));
-    if(g_connman)
+    if (g_connman) {
+        obj.push_back(Pair("networkactive", g_connman->GetNetworkActive()));
         obj.push_back(Pair("connections",   (int)g_connman->GetNodeCount(CConnman::CONNECTIONS_ALL)));
+    }
     obj.push_back(Pair("networks",      GetNetworksInfo()));
     obj.push_back(Pair("relayfee",      ValueFromAmount(::minRelayTxFee.GetFeePerK())));
     UniValue localAddresses(UniValue::VARR);
@@ -571,6 +574,24 @@ UniValue clearbanned(const JSONRPCRequest& request)
     return NullUniValue;
 }
 
+UniValue setnetworkactive(const JSONRPCRequest& request)
+{
+    if (request.fHelp || request.params.size() != 1) {
+        throw runtime_error(
+            "setnetworkactive true|false\n"
+            "Disable/enable all p2p network activity."
+        );
+    }
+
+    if (!g_connman) {
+        throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled");
+    }
+
+    g_connman->SetNetworkActive(request.params[0].get_bool());
+
+    return g_connman->GetNetworkActive();
+}
+
 static const CRPCCommand commands[] =
 { //  category              name                      actor (function)         okSafeMode
   //  --------------------- ------------------------  -----------------------  ----------
@@ -585,6 +606,7 @@ static const CRPCCommand commands[] =
     { "network",            "setban",                 &setban,                 true  },
     { "network",            "listbanned",             &listbanned,             true  },
     { "network",            "clearbanned",            &clearbanned,            true  },
+    { "network",            "setnetworkactive",       &setnetworkactive,       true, },
 };
 
 void RegisterNetRPCCommands(CRPCTable &t)
diff --git a/src/test/rpc_tests.cpp b/src/test/rpc_tests.cpp
index a3d1a25589..a359598ddc 100644
--- a/src/test/rpc_tests.cpp
+++ b/src/test/rpc_tests.cpp
@@ -84,6 +84,28 @@ BOOST_AUTO_TEST_CASE(rpc_rawparams)
     BOOST_CHECK_THROW(CallRPC(string("sendrawtransaction ")+rawtx+" extra"), runtime_error);
 }
 
+BOOST_AUTO_TEST_CASE(rpc_togglenetwork)
+{
+    UniValue r;
+
+    r = CallRPC("getnetworkinfo");
+    bool netState = find_value(r.get_obj(), "networkactive").get_bool();
+    BOOST_CHECK_EQUAL(netState, true);
+
+    BOOST_CHECK_NO_THROW(CallRPC("setnetworkactive false"));
+    r = CallRPC("getnetworkinfo");
+    int numConnection = find_value(r.get_obj(), "connections").get_int();
+    BOOST_CHECK_EQUAL(numConnection, 0);
+
+    netState = find_value(r.get_obj(), "networkactive").get_bool();
+    BOOST_CHECK_EQUAL(netState, false);
+
+    BOOST_CHECK_NO_THROW(CallRPC("setnetworkactive true"));
+    r = CallRPC("getnetworkinfo");
+    netState = find_value(r.get_obj(), "networkactive").get_bool();
+    BOOST_CHECK_EQUAL(netState, true);
+}
+
 BOOST_AUTO_TEST_CASE(rpc_rawsign)
 {
     UniValue r;
diff --git a/src/ui_interface.h b/src/ui_interface.h
index 177ff238db..15b9614f63 100644
--- a/src/ui_interface.h
+++ b/src/ui_interface.h
@@ -85,6 +85,9 @@ public:
     /** Number of network connections changed. */
     boost::signals2::signal<void (int newNumConnections)> NotifyNumConnectionsChanged;
 
+    /** Network activity state changed. */
+    boost::signals2::signal<void (bool networkActive)> NotifyNetworkActiveChanged;
+
     /**
      * Status bar alerts changed.
      */