1 /*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "MtpServerJNI"
18 #include "utils/Log.h"
19
20 #include <stdio.h>
21 #include <assert.h>
22 #include <limits.h>
23 #include <unistd.h>
24 #include <fcntl.h>
25 #include <utils/threads.h>
26
27 #include "jni.h"
28 #include <nativehelper/JNIHelp.h>
29 #include "android_runtime/AndroidRuntime.h"
30 #include "private/android_filesystem_config.h"
31
32 #include "MtpServer.h"
33 #include "MtpStorage.h"
34
35 using namespace android;
36
37 // MtpServer fields
38 static jfieldID field_MtpServer_nativeContext;
39
40 // MtpStorage fields
41 static jfieldID field_MtpStorage_storageId;
42 static jfieldID field_MtpStorage_path;
43 static jfieldID field_MtpStorage_description;
44 static jfieldID field_MtpStorage_reserveSpace;
45 static jfieldID field_MtpStorage_removable;
46 static jfieldID field_MtpStorage_maxFileSize;
47
48 static Mutex sMutex;
49
50 // ----------------------------------------------------------------------------
51
52 // in android_mtp_MtpDatabase.cpp
53 extern MtpDatabase* getMtpDatabase(JNIEnv *env, jobject database);
54
getMtpServer(JNIEnv * env,jobject thiz)55 static inline MtpServer* getMtpServer(JNIEnv *env, jobject thiz) {
56 return (MtpServer*)env->GetLongField(thiz, field_MtpServer_nativeContext);
57 }
58
android_mtp_configure(JNIEnv *,jobject,jboolean usePtp)59 static void android_mtp_configure(JNIEnv *, jobject, jboolean usePtp) {
60 MtpServer::configure(usePtp);
61 }
62
63 static void
android_mtp_MtpServer_setup(JNIEnv * env,jobject thiz,jobject javaDatabase,jboolean usePtp,jstring deviceInfoManufacturer,jstring deviceInfoModel,jstring deviceInfoDeviceVersion,jstring deviceInfoSerialNumber)64 android_mtp_MtpServer_setup(JNIEnv *env, jobject thiz, jobject javaDatabase, jboolean usePtp,
65 jstring deviceInfoManufacturer,
66 jstring deviceInfoModel,
67 jstring deviceInfoDeviceVersion,
68 jstring deviceInfoSerialNumber)
69 {
70 const char *deviceInfoManufacturerStr = env->GetStringUTFChars(deviceInfoManufacturer, NULL);
71 const char *deviceInfoModelStr = env->GetStringUTFChars(deviceInfoModel, NULL);
72 const char *deviceInfoDeviceVersionStr = env->GetStringUTFChars(deviceInfoDeviceVersion, NULL);
73 const char *deviceInfoSerialNumberStr = env->GetStringUTFChars(deviceInfoSerialNumber, NULL);
74 MtpServer* server = new MtpServer(getMtpDatabase(env, javaDatabase),
75 usePtp, AID_MEDIA_RW, 0664, 0775,
76 MtpString((deviceInfoManufacturerStr != NULL) ? deviceInfoManufacturerStr : ""),
77 MtpString((deviceInfoModelStr != NULL) ? deviceInfoModelStr : ""),
78 MtpString((deviceInfoDeviceVersionStr != NULL) ? deviceInfoDeviceVersionStr : ""),
79 MtpString((deviceInfoSerialNumberStr != NULL) ? deviceInfoSerialNumberStr : ""));
80 if (deviceInfoManufacturerStr != NULL) {
81 env->ReleaseStringUTFChars(deviceInfoManufacturer, deviceInfoManufacturerStr);
82 }
83 if (deviceInfoModelStr != NULL) {
84 env->ReleaseStringUTFChars(deviceInfoModel, deviceInfoModelStr);
85 }
86 if (deviceInfoDeviceVersionStr != NULL) {
87 env->ReleaseStringUTFChars(deviceInfoDeviceVersion, deviceInfoDeviceVersionStr);
88 }
89 if (deviceInfoSerialNumberStr != NULL) {
90 env->ReleaseStringUTFChars(deviceInfoSerialNumber, deviceInfoSerialNumberStr);
91 }
92 env->SetLongField(thiz, field_MtpServer_nativeContext, (jlong)server);
93 }
94
95 static void
android_mtp_MtpServer_run(JNIEnv * env,jobject thiz)96 android_mtp_MtpServer_run(JNIEnv *env, jobject thiz)
97 {
98 MtpServer* server = getMtpServer(env, thiz);
99 if (server)
100 server->run();
101 else
102 ALOGE("server is null in run");
103 }
104
105 static void
android_mtp_MtpServer_cleanup(JNIEnv * env,jobject thiz)106 android_mtp_MtpServer_cleanup(JNIEnv *env, jobject thiz)
107 {
108 Mutex::Autolock autoLock(sMutex);
109
110 MtpServer* server = getMtpServer(env, thiz);
111 if (server) {
112 delete server;
113 env->SetLongField(thiz, field_MtpServer_nativeContext, 0);
114 } else {
115 ALOGE("server is null in cleanup");
116 }
117 }
118
119 static void
android_mtp_MtpServer_send_object_added(JNIEnv * env,jobject thiz,jint handle)120 android_mtp_MtpServer_send_object_added(JNIEnv *env, jobject thiz, jint handle)
121 {
122 Mutex::Autolock autoLock(sMutex);
123
124 MtpServer* server = getMtpServer(env, thiz);
125 if (server)
126 server->sendObjectAdded(handle);
127 else
128 ALOGE("server is null in send_object_added");
129 }
130
131 static void
android_mtp_MtpServer_send_object_removed(JNIEnv * env,jobject thiz,jint handle)132 android_mtp_MtpServer_send_object_removed(JNIEnv *env, jobject thiz, jint handle)
133 {
134 Mutex::Autolock autoLock(sMutex);
135
136 MtpServer* server = getMtpServer(env, thiz);
137 if (server)
138 server->sendObjectRemoved(handle);
139 else
140 ALOGE("server is null in send_object_removed");
141 }
142
143 static void
android_mtp_MtpServer_send_device_property_changed(JNIEnv * env,jobject thiz,jint property)144 android_mtp_MtpServer_send_device_property_changed(JNIEnv *env, jobject thiz, jint property)
145 {
146 Mutex::Autolock autoLock(sMutex);
147
148 MtpServer* server = getMtpServer(env, thiz);
149 if (server)
150 server->sendDevicePropertyChanged(property);
151 else
152 ALOGE("server is null in send_object_removed");
153 }
154
155 static void
android_mtp_MtpServer_add_storage(JNIEnv * env,jobject thiz,jobject jstorage)156 android_mtp_MtpServer_add_storage(JNIEnv *env, jobject thiz, jobject jstorage)
157 {
158 Mutex::Autolock autoLock(sMutex);
159
160 MtpServer* server = getMtpServer(env, thiz);
161 if (server) {
162 jint storageID = env->GetIntField(jstorage, field_MtpStorage_storageId);
163 jstring path = (jstring)env->GetObjectField(jstorage, field_MtpStorage_path);
164 jstring description = (jstring)env->GetObjectField(jstorage, field_MtpStorage_description);
165 jlong reserveSpace = env->GetLongField(jstorage, field_MtpStorage_reserveSpace);
166 jboolean removable = env->GetBooleanField(jstorage, field_MtpStorage_removable);
167 jlong maxFileSize = env->GetLongField(jstorage, field_MtpStorage_maxFileSize);
168
169 const char *pathStr = env->GetStringUTFChars(path, NULL);
170 if (pathStr != NULL) {
171 const char *descriptionStr = env->GetStringUTFChars(description, NULL);
172 if (descriptionStr != NULL) {
173 MtpStorage* storage = new MtpStorage(storageID, pathStr, descriptionStr,
174 reserveSpace, removable, maxFileSize);
175 server->addStorage(storage);
176 env->ReleaseStringUTFChars(path, pathStr);
177 env->ReleaseStringUTFChars(description, descriptionStr);
178 } else {
179 env->ReleaseStringUTFChars(path, pathStr);
180 }
181 }
182 } else {
183 ALOGE("server is null in add_storage");
184 }
185 }
186
187 static void
android_mtp_MtpServer_remove_storage(JNIEnv * env,jobject thiz,jint storageId)188 android_mtp_MtpServer_remove_storage(JNIEnv *env, jobject thiz, jint storageId)
189 {
190 Mutex::Autolock autoLock(sMutex);
191
192 MtpServer* server = getMtpServer(env, thiz);
193 if (server) {
194 MtpStorage* storage = server->getStorage(storageId);
195 if (storage) {
196 server->removeStorage(storage);
197 delete storage;
198 }
199 } else
200 ALOGE("server is null in remove_storage");
201 }
202
203 // ----------------------------------------------------------------------------
204
205 static const JNINativeMethod gMethods[] = {
206 {"native_configure", "(Z)V", (void *)android_mtp_configure},
207 {"native_setup", "(Landroid/mtp/MtpDatabase;ZLjava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V",
208 (void *)android_mtp_MtpServer_setup},
209 {"native_run", "()V", (void *)android_mtp_MtpServer_run},
210 {"native_cleanup", "()V", (void *)android_mtp_MtpServer_cleanup},
211 {"native_send_object_added", "(I)V", (void *)android_mtp_MtpServer_send_object_added},
212 {"native_send_object_removed", "(I)V", (void *)android_mtp_MtpServer_send_object_removed},
213 {"native_send_device_property_changed", "(I)V",
214 (void *)android_mtp_MtpServer_send_device_property_changed},
215 {"native_add_storage", "(Landroid/mtp/MtpStorage;)V",
216 (void *)android_mtp_MtpServer_add_storage},
217 {"native_remove_storage", "(I)V", (void *)android_mtp_MtpServer_remove_storage},
218 };
219
register_android_mtp_MtpServer(JNIEnv * env)220 int register_android_mtp_MtpServer(JNIEnv *env)
221 {
222 jclass clazz;
223
224 clazz = env->FindClass("android/mtp/MtpStorage");
225 if (clazz == NULL) {
226 ALOGE("Can't find android/mtp/MtpStorage");
227 return -1;
228 }
229 field_MtpStorage_storageId = env->GetFieldID(clazz, "mStorageId", "I");
230 if (field_MtpStorage_storageId == NULL) {
231 ALOGE("Can't find MtpStorage.mStorageId");
232 return -1;
233 }
234 field_MtpStorage_path = env->GetFieldID(clazz, "mPath", "Ljava/lang/String;");
235 if (field_MtpStorage_path == NULL) {
236 ALOGE("Can't find MtpStorage.mPath");
237 return -1;
238 }
239 field_MtpStorage_description = env->GetFieldID(clazz, "mDescription", "Ljava/lang/String;");
240 if (field_MtpStorage_description == NULL) {
241 ALOGE("Can't find MtpStorage.mDescription");
242 return -1;
243 }
244 field_MtpStorage_reserveSpace = env->GetFieldID(clazz, "mReserveSpace", "J");
245 if (field_MtpStorage_reserveSpace == NULL) {
246 ALOGE("Can't find MtpStorage.mReserveSpace");
247 return -1;
248 }
249 field_MtpStorage_removable = env->GetFieldID(clazz, "mRemovable", "Z");
250 if (field_MtpStorage_removable == NULL) {
251 ALOGE("Can't find MtpStorage.mRemovable");
252 return -1;
253 }
254 field_MtpStorage_maxFileSize = env->GetFieldID(clazz, "mMaxFileSize", "J");
255 if (field_MtpStorage_maxFileSize == NULL) {
256 ALOGE("Can't find MtpStorage.mMaxFileSize");
257 return -1;
258 }
259
260 clazz = env->FindClass("android/mtp/MtpServer");
261 if (clazz == NULL) {
262 ALOGE("Can't find android/mtp/MtpServer");
263 return -1;
264 }
265 field_MtpServer_nativeContext = env->GetFieldID(clazz, "mNativeContext", "J");
266 if (field_MtpServer_nativeContext == NULL) {
267 ALOGE("Can't find MtpServer.mNativeContext");
268 return -1;
269 }
270
271 return AndroidRuntime::registerNativeMethods(env,
272 "android/mtp/MtpServer", gMethods, NELEM(gMethods));
273 }
274