/*
* 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 <stdio.h>
#include <assert.h>
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include <utils/threads.h>
#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->GetIntField(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->SetIntField(thiz, field_MtpServer_nativeContext, (int)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->SetIntField(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_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 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_add_storage", "(Landroid/mtp/MtpStorage;)V",
(void *)android_mtp_MtpServer_add_storage},
{"native_remove_storage", "(I)V", (void *)android_mtp_MtpServer_remove_storage},
};
static const char* const kClassPathName = "android/mtp/MtpServer";
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", "I");
if (field_MtpServer_nativeContext == NULL) {
ALOGE("Can't find MtpServer.mNativeContext");
return -1;
}
return AndroidRuntime::registerNativeMethods(env,
"android/mtp/MtpServer", gMethods, NELEM(gMethods));
}