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 #include "NfcJniUtil.h" 18 19 #include <android-base/stringprintf.h> 20 #include <base/logging.h> 21 #include <errno.h> 22 #include <log/log.h> 23 #include <nativehelper/JNIHelp.h> 24 #include <nativehelper/ScopedLocalRef.h> 25 26 #include "RoutingManager.h" 27 28 using android::base::StringPrintf; 29 30 extern bool nfc_debug_enabled; 31 32 /******************************************************************************* 33 ** 34 ** Function: JNI_OnLoad 35 ** 36 ** Description: Register all JNI functions with Java Virtual Machine. 37 ** jvm: Java Virtual Machine. 38 ** reserved: Not used. 39 ** 40 ** Returns: JNI version. 41 ** 42 *******************************************************************************/ 43 jint JNI_OnLoad(JavaVM* jvm, void*) { 44 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("%s: enter", __func__); 45 JNIEnv* e = NULL; 46 47 LOG(INFO) << StringPrintf("NFC Service: loading nci JNI"); 48 49 // Check JNI version 50 if (jvm->GetEnv((void**)&e, JNI_VERSION_1_6)) return JNI_ERR; 51 52 if (android::register_com_android_nfc_NativeNfcManager(e) == -1) 53 return JNI_ERR; 54 if (android::register_com_android_nfc_NativeLlcpServiceSocket(e) == -1) 55 return JNI_ERR; 56 if (android::register_com_android_nfc_NativeLlcpSocket(e) == -1) 57 return JNI_ERR; 58 if (android::register_com_android_nfc_NativeNfcTag(e) == -1) return JNI_ERR; 59 if (android::register_com_android_nfc_NativeLlcpConnectionlessSocket(e) == -1) 60 return JNI_ERR; 61 if (android::register_com_android_nfc_NativeP2pDevice(e) == -1) 62 return JNI_ERR; 63 if (RoutingManager::getInstance().registerJniFunctions(e) == -1) 64 return JNI_ERR; 65 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("%s: exit", __func__); 66 return JNI_VERSION_1_6; 67 } 68 69 namespace android { 70 71 /******************************************************************************* 72 ** 73 ** Function: nfc_jni_cache_object 74 ** 75 ** Description: 76 ** 77 ** Returns: Status code. 78 ** 79 *******************************************************************************/ 80 int nfc_jni_cache_object(JNIEnv* e, const char* className, jobject* cachedObj) { 81 ScopedLocalRef<jclass> cls(e, e->FindClass(className)); 82 if (cls.get() == NULL) { 83 LOG(ERROR) << StringPrintf("%s: find class error", __func__); 84 return -1; 85 } 86 87 jmethodID ctor = e->GetMethodID(cls.get(), "<init>", "()V"); 88 ScopedLocalRef<jobject> obj(e, e->NewObject(cls.get(), ctor)); 89 if (obj.get() == NULL) { 90 LOG(ERROR) << StringPrintf("%s: create object error", __func__); 91 return -1; 92 } 93 94 *cachedObj = e->NewGlobalRef(obj.get()); 95 if (*cachedObj == NULL) { 96 LOG(ERROR) << StringPrintf("%s: global ref error", __func__); 97 return -1; 98 } 99 return 0; 100 } 101 102 /******************************************************************************* 103 ** 104 ** Function: nfc_jni_get_nfc_socket_handle 105 ** 106 ** Description: Get the value of "mHandle" member variable. 107 ** e: JVM environment. 108 ** o: Java object. 109 ** 110 ** Returns: Value of mHandle. 111 ** 112 *******************************************************************************/ 113 int nfc_jni_get_nfc_socket_handle(JNIEnv* e, jobject o) { 114 ScopedLocalRef<jclass> c(e, e->GetObjectClass(o)); 115 jfieldID f = e->GetFieldID(c.get(), "mHandle", "I"); 116 return e->GetIntField(o, f); 117 } 118 119 /******************************************************************************* 120 ** 121 ** Function: nfc_jni_get_nat 122 ** 123 ** Description: Get the value of "mNative" member variable. 124 ** e: JVM environment. 125 ** o: Java object. 126 ** 127 ** Returns: Pointer to the value of mNative. 128 ** 129 *******************************************************************************/ 130 struct nfc_jni_native_data* nfc_jni_get_nat(JNIEnv* e, jobject o) { 131 ScopedLocalRef<jclass> c(e, e->GetObjectClass(o)); 132 jfieldID f = e->GetFieldID(c.get(), "mNative", "J"); 133 /* Retrieve native structure address */ 134 return (struct nfc_jni_native_data*)e->GetLongField(o, f); 135 } 136 137 /******************************************************************************* 138 ** 139 ** Function nfc_jni_cache_object_local 140 ** 141 ** Description Allocates a java object and calls it's constructor 142 ** 143 ** Returns -1 on failure, 0 on success 144 ** 145 *******************************************************************************/ 146 int nfc_jni_cache_object_local(JNIEnv* e, const char* className, 147 jobject* cachedObj) { 148 ScopedLocalRef<jclass> cls(e, e->FindClass(className)); 149 if (cls.get() == NULL) { 150 LOG(ERROR) << StringPrintf("%s: find class error", __func__); 151 return -1; 152 } 153 154 jmethodID ctor = e->GetMethodID(cls.get(), "<init>", "()V"); 155 jobject obj = e->NewObject(cls.get(), ctor); 156 if (obj == NULL) { 157 LOG(ERROR) << StringPrintf("%s: create object error", __func__); 158 return -1; 159 } 160 161 *cachedObj = obj; 162 if (*cachedObj == NULL) { 163 LOG(ERROR) << StringPrintf("%s: global ref error", __func__); 164 return -1; 165 } 166 return 0; 167 } 168 169 } // namespace android 170
