/**
* Copyright 2011-2012 Adrian Stabiszewski, as@nfctools.org
*
* 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.
*/
package org.nfctools.mf.ul;
import java.io.IOException;
import org.nfctools.NfcException;
import org.nfctools.api.ApduTag;
import org.nfctools.api.NfcTagListener;
import org.nfctools.api.Tag;
import org.nfctools.api.TagInfo;
import org.nfctools.api.TagType;
import org.nfctools.mf.block.MfBlock;
import org.nfctools.ndef.NdefOperationsListener;
import org.nfctools.spi.acs.AcrMfUlReaderWriter;
public class Type2NfcTagListener implements NfcTagListener {
private NdefOperationsListener ndefListener;
public Type2NfcTagListener() {
}
public Type2NfcTagListener(NdefOperationsListener ndefListener) {
this.ndefListener = ndefListener;
}
public void setNdefListener(NdefOperationsListener ndefListener) {
this.ndefListener = ndefListener;
}
@Override
public boolean canHandle(Tag tag) {
return tag.getTagType().equals(TagType.MIFARE_ULTRALIGHT);
}
@Override
public void handleTag(Tag tag) {
Type2NdefOperations ndefOperations = createNdefOperations((ApduTag)tag);
if (ndefListener != null)
ndefListener.onNdefOperations(ndefOperations);
}
protected Type2NdefOperations createNdefOperations(ApduTag tag) {
MfUlReaderWriter readerWriter = new AcrMfUlReaderWriter(tag);
MemoryLayout memoryLayout = null;
boolean formatted = false;
boolean writable = false;
TagInfo tagInfo = null;
try {
tagInfo = readerWriter.getTagInfo();
MfBlock[] initBlocks = readerWriter.readBlock(0, 5);
CapabilityBlock capabilityBlock = new CapabilityBlock(initBlocks[3].getData());
if (UltralightHandler.isBlank(initBlocks)) {
if (UltralightHandler.isUltralight(initBlocks[4].getData())) {
memoryLayout = MemoryLayout.ULTRALIGHT;
}
else if (UltralightHandler.isUltralightC(initBlocks[4].getData())) {
memoryLayout = MemoryLayout.ULTRALIGHT_C;
}
else {
throw new NfcException("Unknown tag size");
}
writable = true;
}
else if (UltralightHandler.isFormatted(initBlocks)) {
formatted = true;
if (capabilityBlock.getSize() == 0x06)
memoryLayout = MemoryLayout.ULTRALIGHT;
else if (capabilityBlock.getSize() == 0x12) {
memoryLayout = MemoryLayout.ULTRALIGHT_C;
}
else {
throw new NfcException("Unknown memory size " + capabilityBlock.getSize());
}
writable = !capabilityBlock.isReadOnly() && !isLocked(readerWriter, memoryLayout);
}
else {
throw new NfcException("Unknown tag contents");
}
}
catch (Exception e) {
throw new NfcException(e);
}
return new Type2NdefOperations(memoryLayout, readerWriter, tagInfo, formatted, writable);
}
private boolean isLocked(MfUlReaderWriter readerWriter, MemoryLayout memoryLayout) throws IOException {
for (LockPage lockPage : memoryLayout.getLockPages()) {
MfBlock[] block = readerWriter.readBlock(lockPage.getPage(), 1);
for (int lockByte : lockPage.getLockBytes()) {
if (block[0].getData()[lockByte] != 0)
return true;
}
}
return false;
}
}