com.intel.bluetooth.BluetoothStackWIDCOMMSDPInputStream Maven / Gradle / Ivy
/**
* BlueCove - Java library for Bluetooth
* Copyright (C) 2006-2008 Vlad Skarzhevskyy
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* @version $Id: BluetoothStackWIDCOMMSDPInputStream.java 1570 2008-01-16 22:15:56Z skarzhevskyy $
*/
package com.intel.bluetooth;
import java.io.IOException;
import java.io.InputStream;
import javax.bluetooth.DataElement;
import javax.bluetooth.UUID;
/**
* Read WIDCOMM SDP_DISC_ATTTR_VAL C struct and convert to DataElements
*
* @author vlads
*/
class BluetoothStackWIDCOMMSDPInputStream extends InputStream {
public static final boolean debug = false;
private InputStream source;
protected BluetoothStackWIDCOMMSDPInputStream(InputStream in) throws IOException {
this.source = in;
readVersionInfo();
}
public int read() throws IOException {
return source.read();
}
private long readLong(int size) throws IOException {
long result = 0;
for (int i = 0; i < size; i++) {
result += ((long) read()) << (8 * i);
}
return result;
}
private long readLongDebug(int size) throws IOException {
long result = 0;
for (int i = 0; i < size; i++) {
int data = read();
if (debug) {
DebugLog.debug("readLong data[" + i + "]", data);
}
result += ((long) data) << (8 * i);
}
return result;
}
private int readInt() throws IOException {
return (int) readLong(4);
}
private byte[] readBytes(int size) throws IOException {
byte[] result = new byte[size];
for (int i = 0; i < size; i++) {
result[i] = (byte) read();
}
return result;
}
static String hexString(byte[] b) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < b.length; i++) {
buf.append(Integer.toHexString(b[i] >> 4 & 0xf));
buf.append(Integer.toHexString(b[i] & 0xf));
}
return buf.toString();
}
static byte[] getUUIDHexBytes(UUID uuid) {
return Utils.UUIDToByteArray(uuid);
}
static final int ATTR_TYPE_INT = 0; // Attribute value is an integer
static final int ATTR_TYPE_TWO_COMP = 1; // Attribute value is an 2's
// complement integer
static final int ATTR_TYPE_UUID = 2; // Attribute value is a UUID
static final int ATTR_TYPE_BOOL = 3; // Attribute value is a boolean
static final int ATTR_TYPE_ARRAY = 4; // Attribute value is an array of
// bytes
static final int MAX_SEQ_ENTRIES = 20;
static final int MAX_ATTR_LEN_OLD = 256;
private int valueSize = 0;
private void readVersionInfo() throws IOException {
valueSize = readInt();
}
public DataElement readElement() throws IOException {
DataElement result = null;
DataElement mainSeq = null;
DataElement currentSeq = null;
int elements = readInt();
if (elements < 0 || elements > MAX_SEQ_ENTRIES) {
throw new IOException("Unexpected number of elements " + elements);
}
if (debug) {
DebugLog.debug("elements", elements);
}
for (int i = 0; i < elements; i++) {
if (debug) {
DebugLog.debug("element", i);
}
int type = readInt();
int length = readInt();
boolean start_of_seq = (readInt() != 0);
if (debug) {
DebugLog.debug("type", type);
DebugLog.debug("length", length);
DebugLog.debug("start_of_seq", start_of_seq);
}
if (length < 0 || valueSize < length) {
throw new IOException("Unexpected length " + length);
}
DataElement dataElement;
switch (type) {
case ATTR_TYPE_INT:
switch (length) {
case 1:
dataElement = new DataElement(DataElement.U_INT_1, readLong(1));
break;
case 2:
dataElement = new DataElement(DataElement.U_INT_2, readLong(2));
break;
case 4:
dataElement = new DataElement(DataElement.U_INT_4, readLong(4));
break;
case 8:
dataElement = new DataElement(DataElement.U_INT_8, readBytes(8));
break;
case 16:
dataElement = new DataElement(DataElement.U_INT_16, readBytes(16));
break;
default:
throw new IOException("Unknown U_INT length " + length);
}
break;
case ATTR_TYPE_TWO_COMP:
switch (length) {
case 1:
dataElement = new DataElement(DataElement.INT_1, (byte) readLong(1));
break;
case 2:
dataElement = new DataElement(DataElement.INT_2, (short) readLong(2));
break;
case 4:
dataElement = new DataElement(DataElement.INT_4, (int) readLong(4));
break;
case 8:
dataElement = new DataElement(DataElement.INT_8, readLongDebug(8));
break;
case 16:
dataElement = new DataElement(DataElement.INT_16, readBytes(16));
break;
default:
throw new IOException("Unknown INT length " + length);
}
break;
case ATTR_TYPE_UUID:
UUID uuid = null;
switch (length) {
case 2:
uuid = new UUID(readLong(2));
break;
case 4:
uuid = new UUID(readLong(4));
break;
case 16:
uuid = new UUID(hexString(readBytes(16)), false);
break;
default:
throw new IOException("Unknown UUID length " + length);
}
dataElement = new DataElement(DataElement.UUID, uuid);
break;
case ATTR_TYPE_BOOL:
dataElement = new DataElement(readLong(length) != 0);
break;
case ATTR_TYPE_ARRAY:
dataElement = new DataElement(DataElement.STRING, Utils.newStringUTF8(readBytes(length)));
break;
default:
throw new IOException("Unknown data type " + type);
}
if (debug) {
DebugLog.debug("dataElement " + dataElement);
}
if (start_of_seq) {
DataElement newSeq = new DataElement(DataElement.DATSEQ);
newSeq.addElement(dataElement);
dataElement = newSeq;
if (i != 0) {
// Second or other sequence
if (mainSeq != null) {
mainSeq.addElement(newSeq);
} else {
// move first sequence to new main sequence
mainSeq = new DataElement(DataElement.DATSEQ);
result = mainSeq;
mainSeq.addElement(currentSeq);
mainSeq.addElement(newSeq);
}
}
currentSeq = newSeq;
} else if (currentSeq != null) {
currentSeq.addElement(dataElement);
}
if (result == null) {
result = dataElement;
}
if ((i < (elements - 1)) && (skip(valueSize - length) != (valueSize - length))) {
throw new IOException("Unexpected end of data");
}
}
return result;
}
}