/* * Copyright (C) 2010 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #define LOG_TAG "MtpServerJNI" #include "utils/Log.h" #include #include #include #include #include #include #include "jni.h" #include "JNIHelp.h" #include "android_runtime/AndroidRuntime.h" #include "private/android_filesystem_config.h" #include "MtpServer.h" #include "MtpStorage.h" using namespace android; // MtpServer fields static jfieldID field_MtpServer_nativeContext; // MtpStorage fields static jfieldID field_MtpStorage_storageId; static jfieldID field_MtpStorage_path; static jfieldID field_MtpStorage_description; static jfieldID field_MtpStorage_reserveSpace; static jfieldID field_MtpStorage_removable; static jfieldID field_MtpStorage_maxFileSize; static Mutex sMutex; // ---------------------------------------------------------------------------- // in android_mtp_MtpDatabase.cpp extern MtpDatabase* getMtpDatabase(JNIEnv *env, jobject database); static inline MtpServer* getMtpServer(JNIEnv *env, jobject thiz) { return (MtpServer*)env->GetLongField(thiz, field_MtpServer_nativeContext); } static void android_mtp_MtpServer_setup(JNIEnv *env, jobject thiz, jobject javaDatabase, jboolean usePtp) { int fd = open("/dev/mtp_usb", O_RDWR); if (fd >= 0) { MtpServer* server = new MtpServer(fd, getMtpDatabase(env, javaDatabase), usePtp, AID_MEDIA_RW, 0664, 0775); env->SetLongField(thiz, field_MtpServer_nativeContext, (jlong)server); } else { ALOGE("could not open MTP driver, errno: %d", errno); } } static void android_mtp_MtpServer_run(JNIEnv *env, jobject thiz) { MtpServer* server = getMtpServer(env, thiz); if (server) server->run(); else ALOGE("server is null in run"); } static void android_mtp_MtpServer_cleanup(JNIEnv *env, jobject thiz) { Mutex::Autolock autoLock(sMutex); MtpServer* server = getMtpServer(env, thiz); if (server) { delete server; env->SetLongField(thiz, field_MtpServer_nativeContext, 0); } else { ALOGE("server is null in cleanup"); } } static void android_mtp_MtpServer_send_object_added(JNIEnv *env, jobject thiz, jint handle) { Mutex::Autolock autoLock(sMutex); MtpServer* server = getMtpServer(env, thiz); if (server) server->sendObjectAdded(handle); else ALOGE("server is null in send_object_added"); } static void android_mtp_MtpServer_send_object_removed(JNIEnv *env, jobject thiz, jint handle) { Mutex::Autolock autoLock(sMutex); MtpServer* server = getMtpServer(env, thiz); if (server) server->sendObjectRemoved(handle); else ALOGE("server is null in send_object_removed"); } static void android_mtp_MtpServer_send_device_property_changed(JNIEnv *env, jobject thiz, jint property) { Mutex::Autolock autoLock(sMutex); MtpServer* server = getMtpServer(env, thiz); if (server) server->sendDevicePropertyChanged(property); else ALOGE("server is null in send_object_removed"); } static void android_mtp_MtpServer_add_storage(JNIEnv *env, jobject thiz, jobject jstorage) { Mutex::Autolock autoLock(sMutex); MtpServer* server = getMtpServer(env, thiz); if (server) { jint storageID = env->GetIntField(jstorage, field_MtpStorage_storageId); jstring path = (jstring)env->GetObjectField(jstorage, field_MtpStorage_path); jstring description = (jstring)env->GetObjectField(jstorage, field_MtpStorage_description); jlong reserveSpace = env->GetLongField(jstorage, field_MtpStorage_reserveSpace); jboolean removable = env->GetBooleanField(jstorage, field_MtpStorage_removable); jlong maxFileSize = env->GetLongField(jstorage, field_MtpStorage_maxFileSize); const char *pathStr = env->GetStringUTFChars(path, NULL); if (pathStr != NULL) { const char *descriptionStr = env->GetStringUTFChars(description, NULL); if (descriptionStr != NULL) { MtpStorage* storage = new MtpStorage(storageID, pathStr, descriptionStr, reserveSpace, removable, maxFileSize); server->addStorage(storage); env->ReleaseStringUTFChars(path, pathStr); env->ReleaseStringUTFChars(description, descriptionStr); } else { env->ReleaseStringUTFChars(path, pathStr); } } } else { ALOGE("server is null in add_storage"); } } static void android_mtp_MtpServer_remove_storage(JNIEnv *env, jobject thiz, jint storageId) { Mutex::Autolock autoLock(sMutex); MtpServer* server = getMtpServer(env, thiz); if (server) { MtpStorage* storage = server->getStorage(storageId); if (storage) { server->removeStorage(storage); delete storage; } } else ALOGE("server is null in remove_storage"); } // ---------------------------------------------------------------------------- static const JNINativeMethod gMethods[] = { {"native_setup", "(Landroid/mtp/MtpDatabase;Z)V", (void *)android_mtp_MtpServer_setup}, {"native_run", "()V", (void *)android_mtp_MtpServer_run}, {"native_cleanup", "()V", (void *)android_mtp_MtpServer_cleanup}, {"native_send_object_added", "(I)V", (void *)android_mtp_MtpServer_send_object_added}, {"native_send_object_removed", "(I)V", (void *)android_mtp_MtpServer_send_object_removed}, {"native_send_device_property_changed", "(I)V", (void *)android_mtp_MtpServer_send_device_property_changed}, {"native_add_storage", "(Landroid/mtp/MtpStorage;)V", (void *)android_mtp_MtpServer_add_storage}, {"native_remove_storage", "(I)V", (void *)android_mtp_MtpServer_remove_storage}, }; int register_android_mtp_MtpServer(JNIEnv *env) { jclass clazz; clazz = env->FindClass("android/mtp/MtpStorage"); if (clazz == NULL) { ALOGE("Can't find android/mtp/MtpStorage"); return -1; } field_MtpStorage_storageId = env->GetFieldID(clazz, "mStorageId", "I"); if (field_MtpStorage_storageId == NULL) { ALOGE("Can't find MtpStorage.mStorageId"); return -1; } field_MtpStorage_path = env->GetFieldID(clazz, "mPath", "Ljava/lang/String;"); if (field_MtpStorage_path == NULL) { ALOGE("Can't find MtpStorage.mPath"); return -1; } field_MtpStorage_description = env->GetFieldID(clazz, "mDescription", "Ljava/lang/String;"); if (field_MtpStorage_description == NULL) { ALOGE("Can't find MtpStorage.mDescription"); return -1; } field_MtpStorage_reserveSpace = env->GetFieldID(clazz, "mReserveSpace", "J"); if (field_MtpStorage_reserveSpace == NULL) { ALOGE("Can't find MtpStorage.mReserveSpace"); return -1; } field_MtpStorage_removable = env->GetFieldID(clazz, "mRemovable", "Z"); if (field_MtpStorage_removable == NULL) { ALOGE("Can't find MtpStorage.mRemovable"); return -1; } field_MtpStorage_maxFileSize = env->GetFieldID(clazz, "mMaxFileSize", "J"); if (field_MtpStorage_maxFileSize == NULL) { ALOGE("Can't find MtpStorage.mMaxFileSize"); return -1; } clazz = env->FindClass("android/mtp/MtpServer"); if (clazz == NULL) { ALOGE("Can't find android/mtp/MtpServer"); return -1; } field_MtpServer_nativeContext = env->GetFieldID(clazz, "mNativeContext", "J"); if (field_MtpServer_nativeContext == NULL) { ALOGE("Can't find MtpServer.mNativeContext"); return -1; } return AndroidRuntime::registerNativeMethods(env, "android/mtp/MtpServer", gMethods, NELEM(gMethods)); }