add 'network' permission

res/project.toml

@@ -1,3 +1,6 @@
 # default project
 name = "default"
 base_packs = ["base"]
+permissions = [
+    "network"
+]

res/scripts/classes.lua

@@ -182,6 +182,9 @@ local function clean(iterable, checkFun, ...)
 end
 
 network.__process_events = function()
+    if not network.is_available() then
+        return
+    end
     local CLIENT_CONNECTED = 1
     local CONNECTED_TO_SERVER = 2
     local DATAGRAM = 3

src/devtools/DebuggingServer.cpp

@@ -94,12 +94,17 @@ bool ClientConnection::alive() const {
 static network::Server& create_tcp_server(
     DebuggingServer& dbgServer, Engine& engine, int port
 ) {
-    auto& network = engine.getNetwork();
+    auto network = engine.getNetwork();
-    u64id_t serverId = network.openTcpServer(
+    if (network == nullptr) {
+        throw std::runtime_error(
+            "unable to create tcp server: project has no network permission"
+        );
+    }
+    u64id_t serverId = network->openTcpServer(
         port,
         [&network, &dbgServer](u64id_t sid, u64id_t id) {
             auto& connection = dynamic_cast<network::ReadableConnection&>(
-                *network.getConnection(id, true)
+                *network->getConnection(id, true)
             );
             connection.setPrivate(true);
             logger.info() << "connected client " << id << ": "
@@ -108,7 +113,7 @@ static network::Server& create_tcp_server(
             dbgServer.setClient(id);
         }
     );
-    auto& server = *network.getServer(serverId, true);
+    auto& server = *network->getServer(serverId, true);
     server.setPrivate(true);
 
     auto& tcpServer = dynamic_cast<network::TcpServer&>(server);
@@ -302,8 +307,10 @@ void DebuggingServer::sendValue(
 }
 
 void DebuggingServer::setClient(u64id_t client) {
+    auto network = engine.getNetwork();
+    assert (network != nullptr);
     connection =
-        std::make_unique<ClientConnection>(engine.getNetwork(), client);
+        std::make_unique<ClientConnection>(*network, client);
     connectionEstablished = false;
 }
 

src/devtools/Project.hpp

@@ -14,6 +14,7 @@ namespace scripting {
 
 struct Permissions {
     static inline std::string WRITE_TO_USER = "write-to-user";
+    static inline std::string NETWORK = "network";
 
     std::set<std::string> permissions;
 

src/engine/Engine.cpp

@@ -138,7 +138,10 @@ void Engine::initialize(CoreParameters coreParameters) {
 
     editor = std::make_unique<devtools::Editor>(*this);
     cmd = std::make_unique<cmd::CommandsInterpreter>();
-    network = network::Network::create(settings.network);
+
+    if (project->permissions.has(Permissions::NETWORK)) {
+        network = network::Network::create(settings.network);
+    }
 
     if (!params.debugServerString.empty()) {
         try {
@@ -233,7 +236,9 @@ void Engine::run() {
 }
 
 void Engine::postUpdate() {
-    network->update();
+    if (network) {
+        network->update();
+    }
     postRunnables.run();
     scripting::process_post_runnables();
 
@@ -266,6 +271,8 @@ void Engine::nextFrame(bool waitForRefresh) {
 }
 
 void Engine::startPauseLoop() {
+    assert (network != nullptr);
+
     bool initialCursorLocked = false;
     if (!isHeadless()) {
         initialCursorLocked = input->isCursorLocked();

src/engine/Engine.hpp

@@ -3,13 +3,12 @@
 #include "CoreParameters.hpp"
 #include "PostRunnables.hpp"
 #include "Time.hpp"
-#include "delegates.hpp"
 #include "settings.hpp"
-#include "typedefs.hpp"
 #include "util/ObjectsKeeper.hpp"
 
 #include <memory>
 #include <string>
+#include <optional>
 
 class Assets;
 class ContentControl;
@@ -161,8 +160,8 @@ public:
         return *window;
     }
 
-    network::Network& getNetwork() {
+    network::Network* getNetwork() {
-        return *network;
+        return network.get();
     }
 
     cmd::CommandsInterpreter& getCmd() {

src/frontend/debug_panel.cpp

@@ -59,6 +59,7 @@ std::shared_ptr<UINode> create_debug_panel(
     Player& player,
     bool allowDebugCheats
 ) {
+    auto network = engine.getNetwork();
     auto& gui = engine.getGUI();
     auto panel = std::make_shared<Panel>(
         gui, glm::vec2(300, 200), glm::vec4(5.0f), 2.0f
@@ -87,17 +88,18 @@ std::shared_ptr<UINode> create_debug_panel(
         fpsMax = fps;
     });
 
-    panel->listenInterval(1.0f, [&engine]() {
+    if (network) {
-        const auto& network = engine.getNetwork();
+        panel->listenInterval(1.0f, [network]() {
-        size_t totalDownload = network.getTotalDownload();
+            size_t totalDownload = network->getTotalDownload();
-        size_t totalUpload = network.getTotalUpload();
+            size_t totalUpload = network->getTotalUpload();
-        netSpeedString =
+            netSpeedString =
-            L"download: " + std::to_wstring(totalDownload - lastTotalDownload) +
+                L"download: " + std::to_wstring(totalDownload - lastTotalDownload) +
-            L" B/s upload: " + std::to_wstring(totalUpload - lastTotalUpload) +
+                L" B/s upload: " + std::to_wstring(totalUpload - lastTotalUpload) +
-            L" B/s";
+                L" B/s";
-        lastTotalDownload = totalDownload;
+            lastTotalDownload = totalDownload;
-        lastTotalUpload = totalUpload;
+            lastTotalUpload = totalUpload;
-    });
+        });
+    }
 
     panel->add(create_label(gui, []() { return L"fps: "+fpsString;}));
    
@@ -116,7 +118,9 @@ std::shared_ptr<UINode> create_debug_panel(
     panel->add(create_label(gui, []() {
         return L"lua-stack: " + std::to_wstring(scripting::get_values_on_stack());
     }));
-    panel->add(create_label(gui, []() { return netSpeedString; }));
+    if (network) {
+        panel->add(create_label(gui, []() { return netSpeedString; }));
+    }
     panel->add(create_label(gui, [&engine]() {
         auto& settings = engine.getSettings();
         bool culling = settings.graphics.frustumCulling.get();

src/logic/scripting/lua/libs/libapp.cpp

@@ -15,7 +15,11 @@ using namespace scripting;
 static int l_start_debug_instance(lua::State* L) {
     int port = lua::tointeger(L, 1);
     if (port == 0) {
-        port = engine->getNetwork().findFreePort();
+        auto network = engine->getNetwork();
+        if (network == nullptr) {
+            throw std::runtime_error("project has no network permission");
+        }
+        port = network->findFreePort();
         if (port == -1) {
             throw std::runtime_error("could not find free port");
         }

src/logic/scripting/lua/libs/libnetwork.cpp

@@ -133,7 +133,7 @@ static int l_post(lua::State* L, network::Network& network) {
     auto headers = read_headers(L, 3);
     int currentRequestId = request_id++;
 
-    engine->getNetwork().post(
+    network.post(
         url,
         string,
         [currentRequestId](std::vector<char> bytes) {
@@ -240,7 +240,7 @@ static int l_recv(lua::State* L, network::Network& network) {
     u64id_t id = lua::tointeger(L, 1);
     int length = lua::tointeger(L, 2);
 
-    auto connection = engine->getNetwork().getConnection(id, false);
+    auto connection = network.getConnection(id, false);
 
     if (connection == nullptr || connection->getTransportType() != network::TransportType::TCP) {
         return 0;
@@ -519,11 +519,21 @@ static int l_pull_events(lua::State* L, network::Network& network) {
     return 1;
 }
 
+int l_is_available(lua::State* L) {
+    return engine->getNetwork() != nullptr;
+}
+
 template <int(*func)(lua::State*, network::Network&)>
 int wrap(lua_State* L) {
     int result = 0;
     try {
-        result = func(L, engine->getNetwork());
+        auto network = engine->getNetwork();
+        if (network == nullptr) {
+            throw std::runtime_error(
+                "network subsystem is not available in the project"
+            );
+        }
+        result = func(L, *network);
     }
     // transform exception with description into lua_error
     catch (std::exception& e) {
@@ -543,6 +553,7 @@ const luaL_Reg networklib[] = {
     {"get_total_upload", wrap<l_get_total_upload>},
     {"get_total_download", wrap<l_get_total_download>},
     {"find_free_port", wrap<l_find_free_port>},
+    {"is_available", lua::wrap<l_is_available>},
     {"__pull_events", wrap<l_pull_events>},
     {"__open_tcp", wrap<l_open_tcp>},
     {"__open_udp", wrap<l_open_udp>},

src/network/Network.cpp

@@ -194,5 +194,6 @@ void Network::update() {
 }
 
 std::unique_ptr<Network> Network::create(const NetworkSettings& settings) {
+    logger.info() << "initializing network";
     return std::make_unique<Network>(network::create_curl_requests());
 }