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1 /*
2  * Copyright (C) 2012 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 "BluetoothPanServiceJni"
18 
19 #define LOG_NDEBUG 0
20 
21 #define CHECK_CALLBACK_ENV                                                      \
22    if (!checkCallbackThread()) {                                                \
23        error("Callback: '%s' is not called on the correct thread", __FUNCTION__);\
24        return;                                                                  \
25    }
26 
27 #include "com_android_bluetooth.h"
28 #include "hardware/bt_pan.h"
29 #include "utils/Log.h"
30 #include "android_runtime/AndroidRuntime.h"
31 
32 #include <string.h>
33 
34 #include <cutils/log.h>
35 #define info(fmt, ...)  ALOGI ("%s(L%d): " fmt,__FUNCTION__, __LINE__,  ## __VA_ARGS__)
36 #define debug(fmt, ...) ALOGD ("%s(L%d): " fmt,__FUNCTION__, __LINE__,  ## __VA_ARGS__)
37 #define warn(fmt, ...) ALOGW ("## WARNING : %s(L%d): " fmt "##",__FUNCTION__, __LINE__, ## __VA_ARGS__)
38 #define error(fmt, ...) ALOGE ("## ERROR : %s(L%d): " fmt "##",__FUNCTION__, __LINE__, ## __VA_ARGS__)
39 #define asrt(s) if(!(s)) ALOGE ("## %s(L%d): ASSERT %s failed! ##",__FUNCTION__, __LINE__, #s)
40 
41 
42 namespace android {
43 
44 static jmethodID method_onConnectStateChanged;
45 static jmethodID method_onControlStateChanged;
46 
47 static const btpan_interface_t *sPanIf = NULL;
48 static jobject mCallbacksObj = NULL;
49 static JNIEnv *sCallbackEnv = NULL;
50 
checkCallbackThread()51 static bool checkCallbackThread() {
52     sCallbackEnv = getCallbackEnv();
53 
54     JNIEnv* env = AndroidRuntime::getJNIEnv();
55     if (sCallbackEnv != env || sCallbackEnv == NULL) return false;
56     return true;
57 }
58 
control_state_callback(btpan_control_state_t state,bt_status_t error,int local_role,const char * ifname)59 static void control_state_callback(btpan_control_state_t state, bt_status_t error, int local_role,
60                 const char* ifname) {
61     debug("state:%d, local_role:%d, ifname:%s", state, local_role, ifname);
62     CHECK_CALLBACK_ENV
63     jstring js_ifname = sCallbackEnv->NewStringUTF(ifname);
64     sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onControlStateChanged, (jint)state, (jint)error,
65                                 (jint)local_role, js_ifname);
66     sCallbackEnv->DeleteLocalRef(js_ifname);
67 }
68 
connection_state_callback(btpan_connection_state_t state,bt_status_t error,const bt_bdaddr_t * bd_addr,int local_role,int remote_role)69 static void connection_state_callback(btpan_connection_state_t state, bt_status_t error, const bt_bdaddr_t *bd_addr,
70                                       int local_role, int remote_role) {
71     jbyteArray addr;
72     debug("state:%d, local_role:%d, remote_role:%d", state, local_role, remote_role);
73     CHECK_CALLBACK_ENV
74     addr = sCallbackEnv->NewByteArray(sizeof(bt_bdaddr_t));
75     if (!addr) {
76         error("Fail to new jbyteArray bd addr for PAN channel state");
77         checkAndClearExceptionFromCallback(sCallbackEnv, __FUNCTION__);
78         return;
79     }
80     sCallbackEnv->SetByteArrayRegion(addr, 0, sizeof(bt_bdaddr_t), (jbyte *) bd_addr);
81 
82     sCallbackEnv->CallVoidMethod(mCallbacksObj, method_onConnectStateChanged, addr, (jint) state,
83                                     (jint)error, (jint)local_role, (jint)remote_role);
84     checkAndClearExceptionFromCallback(sCallbackEnv, __FUNCTION__);
85     sCallbackEnv->DeleteLocalRef(addr);
86 }
87 
88 static btpan_callbacks_t sBluetoothPanCallbacks = {
89     sizeof(sBluetoothPanCallbacks),
90     control_state_callback,
91     connection_state_callback
92 };
93 
94 // Define native functions
95 
classInitNative(JNIEnv * env,jclass clazz)96 static void classInitNative(JNIEnv* env, jclass clazz) {
97     int err;
98     bt_status_t status;
99 
100     method_onConnectStateChanged = env->GetMethodID(clazz, "onConnectStateChanged",
101                                                     "([BIIII)V");
102     method_onControlStateChanged = env->GetMethodID(clazz, "onControlStateChanged",
103                                                     "(IIILjava/lang/String;)V");
104 
105     info("succeeds");
106 }
107 static const bt_interface_t* btIf;
108 
initializeNative(JNIEnv * env,jobject object)109 static void initializeNative(JNIEnv *env, jobject object) {
110     debug("pan");
111     if(btIf)
112         return;
113 
114     if ( (btIf = getBluetoothInterface()) == NULL) {
115         error("Bluetooth module is not loaded");
116         return;
117     }
118 
119     if (sPanIf !=NULL) {
120          ALOGW("Cleaning up Bluetooth PAN Interface before initializing...");
121          sPanIf->cleanup();
122          sPanIf = NULL;
123     }
124 
125     if (mCallbacksObj != NULL) {
126          ALOGW("Cleaning up Bluetooth PAN callback object");
127          env->DeleteGlobalRef(mCallbacksObj);
128          mCallbacksObj = NULL;
129     }
130 
131     if ( (sPanIf = (btpan_interface_t *)
132           btIf->get_profile_interface(BT_PROFILE_PAN_ID)) == NULL) {
133         error("Failed to get Bluetooth PAN Interface");
134         return;
135     }
136 
137     bt_status_t status;
138     if ( (status = sPanIf->init(&sBluetoothPanCallbacks)) != BT_STATUS_SUCCESS) {
139         error("Failed to initialize Bluetooth PAN, status: %d", status);
140         sPanIf = NULL;
141         return;
142     }
143 
144     mCallbacksObj = env->NewGlobalRef(object);
145 }
146 
cleanupNative(JNIEnv * env,jobject object)147 static void cleanupNative(JNIEnv *env, jobject object) {
148     bt_status_t status;
149     if (!btIf) return;
150 
151     if (sPanIf !=NULL) {
152         ALOGW("Cleaning up Bluetooth PAN Interface...");
153         sPanIf->cleanup();
154         sPanIf = NULL;
155     }
156 
157     if (mCallbacksObj != NULL) {
158         ALOGW("Cleaning up Bluetooth PAN callback object");
159         env->DeleteGlobalRef(mCallbacksObj);
160         mCallbacksObj = NULL;
161     }
162     btIf = NULL;
163 }
164 
enablePanNative(JNIEnv * env,jobject object,jint local_role)165 static jboolean enablePanNative(JNIEnv *env, jobject object, jint local_role) {
166     bt_status_t status = BT_STATUS_FAIL;
167     debug("in");
168     jbyte *addr;
169     if (sPanIf)
170         status = sPanIf->enable(local_role);
171     debug("out");
172     return status == BT_STATUS_SUCCESS ? JNI_TRUE : JNI_FALSE;
173 }
getPanLocalRoleNative(JNIEnv * env,jobject object)174 static jint getPanLocalRoleNative(JNIEnv *env, jobject object) {
175     debug("in");
176     int local_role = 0;
177     jbyte *addr;
178     if (sPanIf)
179         local_role  = sPanIf->get_local_role();
180     debug("out");
181     return (jint)local_role;
182 }
183 
184 
185 
connectPanNative(JNIEnv * env,jobject object,jbyteArray address,jint src_role,jint dest_role)186 static jboolean connectPanNative(JNIEnv *env, jobject object, jbyteArray address,
187                                  jint src_role, jint dest_role) {
188     debug("in");
189     bt_status_t status;
190     jbyte *addr;
191     jboolean ret = JNI_TRUE;
192     if (!sPanIf) return JNI_FALSE;
193 
194     addr = env->GetByteArrayElements(address, NULL);
195     if (!addr) {
196         error("Bluetooth device address null");
197         return JNI_FALSE;
198     }
199 
200     if ((status = sPanIf->connect((bt_bdaddr_t *) addr, src_role, dest_role)) !=
201          BT_STATUS_SUCCESS) {
202         error("Failed PAN channel connection, status: %d", status);
203         ret = JNI_FALSE;
204     }
205     env->ReleaseByteArrayElements(address, addr, 0);
206 
207     return ret;
208 }
209 
disconnectPanNative(JNIEnv * env,jobject object,jbyteArray address)210 static jboolean disconnectPanNative(JNIEnv *env, jobject object, jbyteArray address) {
211     bt_status_t status;
212     jbyte *addr;
213     jboolean ret = JNI_TRUE;
214     if (!sPanIf) return JNI_FALSE;
215 
216     addr = env->GetByteArrayElements(address, NULL);
217     if (!addr) {
218         error("Bluetooth device address null");
219         return JNI_FALSE;
220     }
221 
222     if ( (status = sPanIf->disconnect((bt_bdaddr_t *) addr)) !=
223          BT_STATUS_SUCCESS) {
224         error("Failed disconnect pan channel, status: %d", status);
225         ret = JNI_FALSE;
226     }
227     env->ReleaseByteArrayElements(address, addr, 0);
228 
229     return ret;
230 }
231 
232 static JNINativeMethod sMethods[] = {
233     {"classInitNative", "()V", (void *) classInitNative},
234     {"initializeNative", "()V", (void *) initializeNative},
235     {"cleanupNative", "()V", (void *) cleanupNative},
236     {"connectPanNative", "([BII)Z", (void *) connectPanNative},
237     {"enablePanNative", "(I)Z", (void *) enablePanNative},
238     {"getPanLocalRoleNative", "()I", (void *) getPanLocalRoleNative},
239     {"disconnectPanNative", "([B)Z", (void *) disconnectPanNative},
240     // TBD cleanup
241 };
242 
register_com_android_bluetooth_pan(JNIEnv * env)243 int register_com_android_bluetooth_pan(JNIEnv* env)
244 {
245     return jniRegisterNativeMethods(env, "com/android/bluetooth/pan/PanService",
246                                     sMethods, NELEM(sMethods));
247 }
248 
249 }
250