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Diffstat (limited to 'src/nfc/qnearfieldtarget_android.cpp')
| -rw-r--r-- | src/nfc/qnearfieldtarget_android.cpp | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/src/nfc/qnearfieldtarget_android.cpp b/src/nfc/qnearfieldtarget_android.cpp new file mode 100644 index 00000000..891ce3fc --- /dev/null +++ b/src/nfc/qnearfieldtarget_android.cpp @@ -0,0 +1,448 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Centria research and development +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the QtNfc module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qnearfieldtarget_android_p.h" +#include "android/androidjninfc_p.h" +#include "qdebug.h" + +#define NDEFTECHNOLOGY "android.nfc.tech.Ndef" +#define NDEFFORMATABLETECHNOLOGY "android.nfc.tech.NdefFormatable" +#define NFCATECHNOLOGY "android.nfc.tech.NfcA" +#define NFCBTECHNOLOGY "android.nfc.tech.NfcB" +#define NFCFTECHNOLOGY "android.nfc.tech.NfcF" +#define NFCVTECHNOLOGY "android.nfc.tech.NfcV" +#define MIFARECLASSICTECHNOLOGY "android.nfc.tech.MifareClassic" +#define MIFARECULTRALIGHTTECHNOLOGY "android.nfc.tech.MifareUltralight" + +#define MIFARETAG "com.nxp.ndef.mifareclassic" +#define NFCTAGTYPE1 "org.nfcforum.ndef.type1" +#define NFCTAGTYPE2 "org.nfcforum.ndef.type2" +#define NFCTAGTYPE3 "org.nfcforum.ndef.type3" +#define NFCTAGTYPE4 "org.nfcforum.ndef.type4" + +NearFieldTarget::NearFieldTarget(QAndroidJniObject intent, const QByteArray uid, QObject *parent) : + QNearFieldTarget(parent), + m_intent(intent), + m_uid(uid) +{ + updateTechList(); + updateType(); + setupTargetCheckTimer(); +} + +NearFieldTarget::~NearFieldTarget() +{ + releaseIntent(); + emit targetDestroyed(m_uid); +} + +QByteArray NearFieldTarget::uid() const +{ + return m_uid; +} + +QNearFieldTarget::Type NearFieldTarget::type() const +{ + return m_type; +} + +QNearFieldTarget::AccessMethods NearFieldTarget::accessMethods() const +{ + AccessMethods result = NdefAccess; + return result; +} + +bool NearFieldTarget::hasNdefMessage() +{ + return m_techList.contains(QStringLiteral(NDEFTECHNOLOGY)); +} + +QNearFieldTarget::RequestId NearFieldTarget::readNdefMessages() +{ + // Making sure that target has NDEF messages + if (!hasNdefMessage()) + return QNearFieldTarget::RequestId(); + + // Making sure that target is still in range + QNearFieldTarget::RequestId requestId(new QNearFieldTarget::RequestIdPrivate); + if (!m_intent.isValid()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(QNearFieldTarget::Error, QNearFieldTarget::TargetOutOfRangeError), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; + } + + // Getting Ndef technology object + QAndroidJniObject ndef = getTagTechnology(QStringLiteral(NDEFTECHNOLOGY)); + if (!ndef.isValid()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(QNearFieldTarget::Error, QNearFieldTarget::UnsupportedError), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; + } + + // Connect + ndef.callMethod<void>("connect"); + if (catchJavaExceptions()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(QNearFieldTarget::Error, QNearFieldTarget::TargetOutOfRangeError), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; + } + + // Get NdefMessage object + QAndroidJniObject ndefMessage = ndef.callObjectMethod("getNdefMessage", "()Landroid/nfc/NdefMessage;"); + if (catchJavaExceptions()) + ndefMessage = QAndroidJniObject(); + if (!ndefMessage.isValid()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(QNearFieldTarget::Error, QNearFieldTarget::NdefReadError), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; + } + + // Convert to byte array + QAndroidJniObject ndefMessageBA = ndefMessage.callObjectMethod("toByteArray", "()[B"); + QByteArray ndefMessageQBA = jbyteArrayToQByteArray(ndefMessageBA.object<jbyteArray>()); + + // Closing connection + ndef.callMethod<void>("close"); + catchJavaExceptions(); // IOException at this point does not matter anymore. + + // Sending QNdefMessage, requestCompleted and exit. + QNdefMessage qNdefMessage = QNdefMessage::fromByteArray(ndefMessageQBA); + QMetaObject::invokeMethod(this, "ndefMessageRead", Qt::QueuedConnection, + Q_ARG(const QNdefMessage&, qNdefMessage)); + QMetaObject::invokeMethod(this, "requestCompleted", Qt::QueuedConnection, + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + QMetaObject::invokeMethod(this, "ndefMessageRead", Qt::QueuedConnection, + Q_ARG(const QNdefMessage&, qNdefMessage), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; +} + + +QNearFieldTarget::RequestId NearFieldTarget::sendCommand(const QByteArray &command) +{ + Q_UNUSED(command); + Q_EMIT QNearFieldTarget::error(QNearFieldTarget::UnsupportedError, QNearFieldTarget::RequestId()); + return QNearFieldTarget::RequestId(); + + //Not supported for now + /*if (command.size() == 0) { + Q_EMIT QNearFieldTarget::error(QNearFieldTarget::InvalidParametersError, QNearFieldTarget::RequestId()); + return QNearFieldTarget::RequestId(); + } + + AndroidNfc::AttachedJNIEnv aenv; + JNIEnv *env = aenv.jniEnv; + + jobject tagTech; + if (m_techList.contains(QStringLiteral(NFCATECHNOLOGY))) { + tagTech = getTagTechnology(QStringLiteral(NFCATECHNOLOGY)); + } else if (m_techList.contains(QStringLiteral(NFCBTECHNOLOGY))) { + tagTech = getTagTechnology(QStringLiteral(NFCBTECHNOLOGY)); + } else if (m_techList.contains(QStringLiteral(NFCFTECHNOLOGY))) { + tagTech = getTagTechnology(QStringLiteral(NFCFTECHNOLOGY)); + } else if (m_techList.contains(QStringLiteral(NFCVTECHNOLOGY))) { + tagTech = getTagTechnology(QStringLiteral(NFCVTECHNOLOGY)); + } else { + Q_EMIT QNearFieldTarget::error(QNearFieldTarget::UnsupportedError, QNearFieldTarget::RequestId()); + return QNearFieldTarget::RequestId(); + } + + QByteArray ba(ba); + + jclass techClass = env->GetObjectClass(tagTech); + jmethodID tranceiveMID = env->GetMethodID(techClass, "tranceive", "([B)[B"); + Q_ASSERT_X(tranceiveMID != 0, "sendCommand", "could not find tranceive method"); + + jbyteArray jba = env->NewByteArray(ba.size()); + env->SetByteArrayRegion(jba, 0, ba.size(), reinterpret_cast<jbyte*>(ba.data())); + + jbyteArray rsp = reinterpret_cast<jbyteArray>(env->CallObjectMethod(tagTech, tranceiveMID, jba)); + + jsize len = env->GetArrayLength(rsp); + QByteArray rspQBA; + rspQBA.resize(len); + + env->GetByteArrayRegion(rsp, 0, len, reinterpret_cast<jbyte*>(rspQBA.data())); + + qDebug() << "Send command returned QBA size: " << rspQBA.size(); + + + env->DeleteLocalRef(jba); + + + return QNearFieldTarget::RequestId();*/ +} + +QNearFieldTarget::RequestId NearFieldTarget::sendCommands(const QList<QByteArray> &commands) +{ + QNearFieldTarget::RequestId requestId; + for (int i=0; i < commands.size(); i++){ + requestId = sendCommand(commands.at(i)); + } + return requestId; +} + +QNearFieldTarget::RequestId NearFieldTarget::writeNdefMessages(const QList<QNdefMessage> &messages) +{ + if (messages.size() == 0) + return QNearFieldTarget::RequestId(); + + if (messages.size() > 1) + qWarning("QNearFieldTarget::writeNdefMessages: Android supports writing only one NDEF message per tag."); + + QAndroidJniEnvironment env; + const char *writeMethod; + QAndroidJniObject tagTechnology; + + // Getting write method + if (m_techList.contains(QStringLiteral(NDEFFORMATABLETECHNOLOGY))) { + tagTechnology = getTagTechnology(QStringLiteral(NDEFFORMATABLETECHNOLOGY)); + writeMethod = "format"; + } else if (m_techList.contains(QStringLiteral(NDEFTECHNOLOGY))) { + tagTechnology = getTagTechnology(QStringLiteral(NDEFTECHNOLOGY)); + writeMethod = "writeNdefMessage"; + } else { + // An invalid request id will be returned if the target does not support writing NDEF messages. + return QNearFieldTarget::RequestId(); + } + + // Connecting + QNearFieldTarget::RequestId requestId = QNearFieldTarget::RequestId(new QNearFieldTarget::RequestIdPrivate()); + tagTechnology.callMethod<void>("connect"); + if (catchJavaExceptions()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(QNearFieldTarget::Error, QNearFieldTarget::TargetOutOfRangeError), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; + } + + // Making NdefMessage object + const QNdefMessage &message = messages.first(); + QByteArray ba = message.toByteArray(); + QAndroidJniObject jba = env->NewByteArray(ba.size()); + env->SetByteArrayRegion(jba.object<jbyteArray>(), 0, ba.size(), reinterpret_cast<jbyte*>(ba.data())); + QAndroidJniObject jmessage = QAndroidJniObject("android/nfc/NdefMessage", "([B)V", jba.object<jbyteArray>()); + if (catchJavaExceptions()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(QNearFieldTarget::Error, QNearFieldTarget::UnknownError), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; + } + + // Writing + tagTechnology.callMethod<void>(writeMethod, "(Landroid/nfc/NdefMessage;)V", jmessage.object<jobject>()); + if (catchJavaExceptions()) { + QMetaObject::invokeMethod(this, "error", Qt::QueuedConnection, + Q_ARG(QNearFieldTarget::Error, QNearFieldTarget::NdefWriteError), + Q_ARG(const QNearFieldTarget::RequestId&, requestId)); + return requestId; + } + + // Closing connection, sending signal and exit + tagTechnology.callMethod<void>("close"); + catchJavaExceptions(); // IOException at this point does not matter anymore. + QMetaObject::invokeMethod(this, "ndefMessagesWritten", Qt::QueuedConnection); + return requestId; +} + +void NearFieldTarget::setIntent(QAndroidJniObject intent) +{ + if (m_intent == intent) + return; + + releaseIntent(); + m_intent = intent; + if (m_intent.isValid()) { + // Updating tech list and type in case of there is another tag with same UID as one before. + updateTechList(); + updateType(); + m_targetCheckTimer->start(); + } +} + +void NearFieldTarget::checkIsTargetLost() +{ + if (!m_intent.isValid() || m_techList.isEmpty()) { + handleTargetLost(); + return; + } + // Using first available technology to check connection + QString techStr = m_techList.first(); + QAndroidJniObject tagTech = getTagTechnology(techStr); + tagTech.callMethod<void>("connect"); + if (catchJavaExceptions()) { + handleTargetLost(); + return; + } + tagTech.callMethod<void>("close"); + if (catchJavaExceptions()) + handleTargetLost(); +} + +void NearFieldTarget::releaseIntent() +{ + m_targetCheckTimer->stop(); + + m_intent = QAndroidJniObject(); +} + +void NearFieldTarget::updateTechList() +{ + if (!m_intent.isValid()) + return; + + // Getting tech list + QAndroidJniEnvironment env; + QAndroidJniObject tag = AndroidNfc::getTag(m_intent); + QAndroidJniObject techListArray = tag.callObjectMethod("getTechList", "()[Ljava/lang/String;"); + if (!techListArray.isValid()) { + handleTargetLost(); + return; + } + + // Converting tech list array to QStringList. + m_techList.clear(); + jsize techCount = env->GetArrayLength(techListArray.object<jobjectArray>()); + for (jsize i = 0; i < techCount; ++i) { + QAndroidJniObject tech = env->GetObjectArrayElement(techListArray.object<jobjectArray>(), i); + m_techList.append(tech.callObjectMethod<jstring>("toString").toString()); + } +} + +void NearFieldTarget::updateType() +{ + m_type = getTagType(); +} + +QNearFieldTarget::Type NearFieldTarget::getTagType() const +{ + QAndroidJniEnvironment env; + + if (m_techList.contains(QStringLiteral(NDEFTECHNOLOGY))) { + QAndroidJniObject ndef = getTagTechnology(QStringLiteral(NDEFTECHNOLOGY)); + QString qtype = ndef.callObjectMethod("getType", "()Ljava/lang/String;").toString(); + + if (qtype.compare(QStringLiteral(MIFARETAG)) == 0) + return MifareTag; + if (qtype.compare(QStringLiteral(NFCTAGTYPE1)) == 0) + return NfcTagType1; + if (qtype.compare(QStringLiteral(NFCTAGTYPE2)) == 0) + return NfcTagType2; + if (qtype.compare(QStringLiteral(NFCTAGTYPE3)) == 0) + return NfcTagType3; + if (qtype.compare(QStringLiteral(NFCTAGTYPE4)) == 0) + return NfcTagType4; + return ProprietaryTag; + } else if (m_techList.contains(QStringLiteral(NFCATECHNOLOGY))) { + if (m_techList.contains(QStringLiteral(MIFARECLASSICTECHNOLOGY))) + return MifareTag; + + // Checking ATQA/SENS_RES + // xxx0 0000 xxxx xxxx: Identifies tag Type 1 platform + QAndroidJniObject nfca = getTagTechnology(QStringLiteral(NFCATECHNOLOGY)); + QAndroidJniObject atqaBA = nfca.callObjectMethod("getAtqa", "()[B"); + QByteArray atqaQBA = jbyteArrayToQByteArray(atqaBA.object<jbyteArray>()); + if (atqaQBA.isEmpty()) + return ProprietaryTag; + if ((atqaQBA[0] & 0x1F) == 0x00) + return NfcTagType1; + + // Checking SAK/SEL_RES + // xxxx xxxx x00x x0xx: Identifies tag Type 2 platform + // xxxx xxxx x01x x0xx: Identifies tag Type 4 platform + jshort sakS = nfca.callMethod<jshort>("getSak"); + if ((sakS & 0x0064) == 0x0000) + return NfcTagType2; + else if ((sakS & 0x0064) == 0x0020) + return NfcTagType4; + return ProprietaryTag; + } else if (m_techList.contains(QStringLiteral(NFCBTECHNOLOGY))) { + return NfcTagType4; + } else if (m_techList.contains(QStringLiteral(NFCFTECHNOLOGY))) { + return NfcTagType3; + } + + return ProprietaryTag; +} + +void NearFieldTarget::setupTargetCheckTimer() +{ + m_targetCheckTimer = new QTimer(this); + m_targetCheckTimer->setInterval(1000); + connect(m_targetCheckTimer, SIGNAL(timeout()), this, SLOT(checkIsTargetLost())); + m_targetCheckTimer->start(); +} + +void NearFieldTarget::handleTargetLost() +{ + releaseIntent(); + emit targetLost(this); +} + +QAndroidJniObject NearFieldTarget::getTagTechnology(const QString &tech) const +{ + QString techClass(tech); + techClass.replace(QLatin1Char('.'), QLatin1Char('/')); + + // Getting requested technology + QAndroidJniObject tag = AndroidNfc::getTag(m_intent); + const QString sig = QString::fromUtf8("(Landroid/nfc/Tag;)L%1;"); + QAndroidJniObject tagtech = QAndroidJniObject::callStaticObjectMethod(techClass.toUtf8().constData(), "get", + sig.arg(techClass).toUtf8().constData(), tag.object<jobject>()); + return tagtech; +} + +QByteArray NearFieldTarget::jbyteArrayToQByteArray(const jbyteArray &byteArray) const +{ + QAndroidJniEnvironment env; + QByteArray resultArray; + jsize len = env->GetArrayLength(byteArray); + resultArray.resize(len); + env->GetByteArrayRegion(byteArray, 0, len, reinterpret_cast<jbyte*>(resultArray.data())); + return resultArray; +} + +bool NearFieldTarget::catchJavaExceptions() const +{ + QAndroidJniEnvironment env; + if (env->ExceptionCheck()) { + env->ExceptionDescribe(); + env->ExceptionClear(); + return true; + } + return false; +} |