fs.mitm: Intercept qlaunch sysver request

stratosphere/fs_mitm/source/fsmitm_main.cpp

@@ -32,6 +32,8 @@
 
 #include "fsmitm_utils.hpp"
 
+#include "setsys_mitm_service.hpp"
+
 extern "C" {
     extern u32 __start__;
 
@@ -86,13 +88,28 @@ void __appExit(void) {
     smExit();
 }
 
+void CreateSettingsMitMServer(void *arg) {
+    MultiThreadedWaitableManager *server_manager = (MultiThreadedWaitableManager *)arg;
+    
+    Result rc;
+    if (R_FAILED((rc = setsysInitialize()))) {
+        fatalSimple(rc);
+    }
+    
+    ISession<MitMQueryService<SetSysMitMService>> *setsys_query_srv = NULL;
+    MitMServer<SetSysMitMService> *setsys_srv = new MitMServer<SetSysMitMService>(&setsys_query_srv, "set:sys", 60);
+    server_manager->add_waitable(setsys_srv);
+    server_manager->add_waitable(setsys_query_srv);
+    
+    svcExitThread();
+}
+
 int main(int argc, char **argv)
 {
     Thread worker_thread = {0};
     Thread sd_initializer_thread = {0};
     Thread hid_initializer_thread = {0};
-    consoleDebugInit(debugDevice_SVC);
-    
+    Thread set_mitm_setup_thread = {0};
     consoleDebugInit(debugDevice_SVC);
         
     if (R_FAILED(threadCreate(&worker_thread, &FsMitMWorker::Main, NULL, 0x20000, 45, 0))) {
@@ -117,8 +134,7 @@ int main(int argc, char **argv)
     }
     
     /* TODO: What's a good timeout value to use here? */
-    auto server_manager = std::make_unique<MultiThreadedWaitableManager>(5, U64_MAX, 0x20000);
-    //auto server_manager = std::make_unique<WaitableManager>(U64_MAX);
+    MultiThreadedWaitableManager *server_manager = new MultiThreadedWaitableManager(5, U64_MAX, 0x20000);
         
     /* Create fsp-srv mitm. */
     ISession<MitMQueryService<FsMitMService>> *fs_query_srv = NULL;
@@ -126,9 +142,19 @@ int main(int argc, char **argv)
     server_manager->add_waitable(fs_srv);
     server_manager->add_waitable(fs_query_srv);
     
+    /* Create set:sys mitm server, delayed until set:sys is available. */
+    if (R_FAILED(threadCreate(&set_mitm_setup_thread, &CreateSettingsMitMServer, server_manager, 0x4000, 0x15, 0))) {
+        /* TODO: Panic. */
+    }
+    if (R_FAILED(threadStart(&set_mitm_setup_thread))) {
+        /* TODO: Panic. */
+    }
+            
     /* Loop forever, servicing our services. */
     server_manager->process();
     
+    delete server_manager;
+
     return 0;
 }
 

stratosphere/fs_mitm/source/setsys_mitm_service.cpp

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <mutex>
+#include <switch.h>
+#include "setsys_mitm_service.hpp"
+
+#include "mitm_query_service.hpp"
+#include "debug.hpp"
+
+static HosMutex g_version_mutex;
+static bool g_got_version = false;
+static SetSysFirmwareVersion g_fw_version = {0};
+
+static Result _GetFirmwareVersion(SetSysFirmwareVersion *out) {
+    std::lock_guard<HosMutex> lock(g_version_mutex);
+    if (!g_got_version) {
+        Result rc = setsysGetFirmwareVersion(&g_fw_version);
+        if (R_FAILED(rc)) {
+            return rc;
+        }
+        
+        /* Modify the output firmware version. */
+        {
+            u32 major, minor, micro;
+            char display_version[sizeof(g_fw_version.display_version)] = {0};
+            
+            GetAtmosphereApiVersion(&major, &minor, &micro, nullptr, nullptr);
+            snprintf(display_version, sizeof(display_version), "%s (AMS %u.%u.%u)", g_fw_version.display_version, major, minor, micro);
+            
+            memcpy(g_fw_version.display_version, display_version, sizeof(g_fw_version.display_version));
+        }
+        
+        g_got_version = true;
+    }
+    
+    *out = g_fw_version;
+    return 0;
+}
+
+Result SetSysMitMService::dispatch(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id, u8 *pointer_buffer, size_t pointer_buffer_size) {
+    Result rc = 0xF601;
+
+    switch (static_cast<SetSysCmd>(cmd_id)) {
+        case SetSysCmd::GetFirmwareVersion:
+            rc = WrapIpcCommandImpl<&SetSysMitMService::get_firmware_version>(this, r, out_c, pointer_buffer, pointer_buffer_size);
+            break;
+        case SetSysCmd::GetFirmwareVersion2:
+            if (kernelAbove300()) {
+                rc = WrapIpcCommandImpl<&SetSysMitMService::get_firmware_version2>(this, r, out_c, pointer_buffer, pointer_buffer_size);
+            }
+            break;
+        default:
+            break;
+    }
+    
+    return rc;
+}
+
+void SetSysMitMService::postprocess(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id, u8 *pointer_buffer, size_t pointer_buffer_size) {
+    /* No commands need postprocessing. */    
+}
+
+Result SetSysMitMService::handle_deferred() {
+    /* This service is never deferrable. */
+    return 0;
+}
+
+std::tuple<Result> SetSysMitMService::get_firmware_version(OutPointerWithServerSize<SetSysFirmwareVersion, 0x1> out) {
+    if (out.num_elements != 1) {
+        return {0xF601};
+    }
+    
+    Result rc = _GetFirmwareVersion(out.pointer);
+    
+    /* GetFirmwareVersion sanitizes these fields. */
+    out.pointer->revision_major = 0;
+    out.pointer->revision_minor = 0;
+        
+    return {rc};
+}
+
+std::tuple<Result> SetSysMitMService::get_firmware_version2(OutPointerWithServerSize<SetSysFirmwareVersion, 0x1> out) {
+    if (out.num_elements != 1) {
+        return {0xF601};
+    }
+    
+    Result rc = _GetFirmwareVersion(out.pointer);
+        
+    return {rc};
+}

stratosphere/fs_mitm/source/setsys_mitm_service.hpp

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2018 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+ 
+#pragma once
+#include <switch.h>
+#include <stratosphere/iserviceobject.hpp>
+#include "imitmserviceobject.hpp"
+#include "fsmitm_utils.hpp"
+
+enum class SetSysCmd {
+    GetFirmwareVersion = 3,
+    GetFirmwareVersion2 = 4,
+};
+
+class SetSysMitMService : public IMitMServiceObject {      
+    private:
+    public:
+        SetSysMitMService(Service *s) : IMitMServiceObject(s) {
+            /* ... */
+        }
+        
+        static bool should_mitm(u64 pid, u64 tid) {
+            /* Only MitM qlaunch, maintenance. */
+            return tid == 0x0100000000001000ULL || tid == 0x0100000000001015ULL;
+        }
+        
+        SetSysMitMService *clone() override {
+            auto new_srv = new SetSysMitMService((Service *)&this->forward_service);
+            this->clone_to(new_srv);
+            return new_srv;
+        }
+        
+        void clone_to(void *o) override {
+            /* ... */
+        }
+        
+        virtual Result dispatch(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id, u8 *pointer_buffer, size_t pointer_buffer_size);
+        virtual void postprocess(IpcParsedCommand &r, IpcCommand &out_c, u64 cmd_id, u8 *pointer_buffer, size_t pointer_buffer_size);
+        virtual Result handle_deferred();
+    
+    protected:
+        /* Overridden commands. */
+        std::tuple<Result> get_firmware_version(OutPointerWithServerSize<SetSysFirmwareVersion, 0x1> out);
+        std::tuple<Result> get_firmware_version2(OutPointerWithServerSize<SetSysFirmwareVersion, 0x1> out);
+};

stratosphere/libstratosphere/include/stratosphere/isession.hpp

@@ -196,7 +196,7 @@ class ISession : public IWaitable {
                     /* TODO: Panic? */
                 }                                
                 IpcParsedCommand r;
-                u64 cmd_id;
+                u64 cmd_id = 0;
                 
                 
                 Result retval = ipcParse(&r);