Move DnsSdTxtRecord to net common static library (3587754f) · Commits · e / os / android_frameworks_base

core/java/android/net/nsd/DnsSdTxtRecord.java

deleted100644 → 0

+0 −325

Original line number	Diff line number	Diff line
		/* -- Mode: Java; tab-width: 4 --
		*
		* Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
		*
		* 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.

		To do:
		- implement remove()
		- fix set() to replace existing values
		*/

		package android.net.nsd;

		import android.os.Parcelable;
		import android.os.Parcel;

		import java.util.Arrays;

		/**
		* This class handles TXT record data for DNS based service discovery as specified at
		* http://tools.ietf.org/html/draft-cheshire-dnsext-dns-sd-11
		*
		* DNS-SD specifies that a TXT record corresponding to an SRV record consist of
		* a packed array of bytes, each preceded by a length byte. Each string
		* is an attribute-value pair.
		*
		* The DnsSdTxtRecord object stores the entire TXT data as a single byte array, traversing it
		* as need be to implement its various methods.
		* @hide
		*
		*/
		public class DnsSdTxtRecord implements Parcelable {
		private static final byte mSeperator = '=';

		private byte[] mData;

		/** Constructs a new, empty TXT record. */
		public DnsSdTxtRecord() {
		mData = new byte[0];
		}

		/** Constructs a new TXT record from a byte array in the standard format. */
		public DnsSdTxtRecord(byte[] data) {
		mData = (byte[]) data.clone();
		}

		/** Copy constructor */
		public DnsSdTxtRecord(DnsSdTxtRecord src) {
		if (src != null && src.mData != null) {
		mData = (byte[]) src.mData.clone();
		}
		}

		/**
		* Set a key/value pair. Setting an existing key will replace its value.
		* @param key Must be ascii with no '='
		* @param value matching value to key
		*/
		public void set(String key, String value) {
		byte[] keyBytes;
		byte[] valBytes;
		int valLen;

		if (value != null) {
		valBytes = value.getBytes();
		valLen = valBytes.length;
		} else {
		valBytes = null;
		valLen = 0;
		}

		try {
		keyBytes = key.getBytes("US-ASCII");
		}
		catch (java.io.UnsupportedEncodingException e) {
		throw new IllegalArgumentException("key should be US-ASCII");
		}

		for (int i = 0; i < keyBytes.length; i++) {
		if (keyBytes[i] == '=') {
		throw new IllegalArgumentException("= is not a valid character in key");
		}
		}

		if (keyBytes.length + valLen >= 255) {
		throw new IllegalArgumentException("Key and Value length cannot exceed 255 bytes");
		}

		int currentLoc = remove(key);
		if (currentLoc == -1)
		currentLoc = keyCount();

		insert(keyBytes, valBytes, currentLoc);
		}

		/**
		* Get a value for a key
		*
		* @param key
		* @return The value associated with the key
		*/
		public String get(String key) {
		byte[] val = this.getValue(key);
		return val != null ? new String(val) : null;
		}

		/** Remove a key/value pair. If found, returns the index or -1 if not found */
		public int remove(String key) {
		int avStart = 0;

		for (int i=0; avStart < mData.length; i++) {
		int avLen = mData[avStart];
		if (key.length() <= avLen &&
		(key.length() == avLen \|\| mData[avStart + key.length() + 1] == mSeperator)) {
		String s = new String(mData, avStart + 1, key.length());
		if (0 == key.compareToIgnoreCase(s)) {
		byte[] oldBytes = mData;
		mData = new byte[oldBytes.length - avLen - 1];
		System.arraycopy(oldBytes, 0, mData, 0, avStart);
		System.arraycopy(oldBytes, avStart + avLen + 1, mData, avStart,
		oldBytes.length - avStart - avLen - 1);
		return i;
		}
		}
		avStart += (0xFF & (avLen + 1));
		}
		return -1;
		}

		/** Return the count of keys */
		public int keyCount() {
		int count = 0, nextKey;
		for (nextKey = 0; nextKey < mData.length; count++) {
		nextKey += (0xFF & (mData[nextKey] + 1));
		}
		return count;
		}

		/** Return true if key is present, false if not. */
		public boolean contains(String key) {
		String s = null;
		for (int i = 0; null != (s = this.getKey(i)); i++) {
		if (0 == key.compareToIgnoreCase(s)) return true;
		}
		return false;
		}

		/* Gets the size in bytes */
		public int size() {
		return mData.length;
		}

		/* Gets the raw data in bytes */
		public byte[] getRawData() {
		return (byte[]) mData.clone();
		}

		private void insert(byte[] keyBytes, byte[] value, int index) {
		byte[] oldBytes = mData;
		int valLen = (value != null) ? value.length : 0;
		int insertion = 0;
		int newLen, avLen;

		for (int i = 0; i < index && insertion < mData.length; i++) {
		insertion += (0xFF & (mData[insertion] + 1));
		}

		avLen = keyBytes.length + valLen + (value != null ? 1 : 0);
		newLen = avLen + oldBytes.length + 1;

		mData = new byte[newLen];
		System.arraycopy(oldBytes, 0, mData, 0, insertion);
		int secondHalfLen = oldBytes.length - insertion;
		System.arraycopy(oldBytes, insertion, mData, newLen - secondHalfLen, secondHalfLen);
		mData[insertion] = (byte) avLen;
		System.arraycopy(keyBytes, 0, mData, insertion + 1, keyBytes.length);
		if (value != null) {
		mData[insertion + 1 + keyBytes.length] = mSeperator;
		System.arraycopy(value, 0, mData, insertion + keyBytes.length + 2, valLen);
		}
		}

		/** Return a key in the TXT record by zero-based index. Returns null if index exceeds the total number of keys. */
		private String getKey(int index) {
		int avStart = 0;

		for (int i=0; i < index && avStart < mData.length; i++) {
		avStart += mData[avStart] + 1;
		}

		if (avStart < mData.length) {
		int avLen = mData[avStart];
		int aLen = 0;

		for (aLen=0; aLen < avLen; aLen++) {
		if (mData[avStart + aLen + 1] == mSeperator) break;
		}
		return new String(mData, avStart + 1, aLen);
		}
		return null;
		}

		/**
		* Look up a key in the TXT record by zero-based index and return its value.
		* Returns null if index exceeds the total number of keys.
		* Returns null if the key is present with no value.
		*/
		private byte[] getValue(int index) {
		int avStart = 0;
		byte[] value = null;

		for (int i=0; i < index && avStart < mData.length; i++) {
		avStart += mData[avStart] + 1;
		}

		if (avStart < mData.length) {
		int avLen = mData[avStart];
		int aLen = 0;

		for (aLen=0; aLen < avLen; aLen++) {
		if (mData[avStart + aLen + 1] == mSeperator) {
		value = new byte[avLen - aLen - 1];
		System.arraycopy(mData, avStart + aLen + 2, value, 0, avLen - aLen - 1);
		break;
		}
		}
		}
		return value;
		}

		private String getValueAsString(int index) {
		byte[] value = this.getValue(index);
		return value != null ? new String(value) : null;
		}

		private byte[] getValue(String forKey) {
		String s = null;
		int i;

		for (i = 0; null != (s = this.getKey(i)); i++) {
		if (0 == forKey.compareToIgnoreCase(s)) {
		return this.getValue(i);
		}
		}

		return null;
		}

		/**
		* Return a string representation.
		* Example : {key1=value1},{key2=value2}..
		*
		* For a key say like "key3" with null value
		* {key1=value1},{key2=value2}{key3}
		*/
		public String toString() {
		String a, result = null;

		for (int i = 0; null != (a = this.getKey(i)); i++) {
		String av = "{" + a;
		String val = this.getValueAsString(i);
		if (val != null)
		av += "=" + val + "}";
		else
		av += "}";
		if (result == null)
		result = av;
		else
		result = result + ", " + av;
		}
		return result != null ? result : "";
		}

		@Override
		public boolean equals(Object o) {
		if (o == this) {
		return true;
		}
		if (!(o instanceof DnsSdTxtRecord)) {
		return false;
		}

		DnsSdTxtRecord record = (DnsSdTxtRecord)o;
		return Arrays.equals(record.mData, mData);
		}

		@Override
		public int hashCode() {
		return Arrays.hashCode(mData);
		}

		/** Implement the Parcelable interface */
		public int describeContents() {
		return 0;
		}

		/** Implement the Parcelable interface */
		public void writeToParcel(Parcel dest, int flags) {
		dest.writeByteArray(mData);
		}

		/** Implement the Parcelable interface */
		public static final @android.annotation.NonNull Creator<DnsSdTxtRecord> CREATOR =
		new Creator<DnsSdTxtRecord>() {
		public DnsSdTxtRecord createFromParcel(Parcel in) {
		DnsSdTxtRecord info = new DnsSdTxtRecord();
		in.readByteArray(info.mData);
		return info;
		}

		public DnsSdTxtRecord[] newArray(int size) {
		return new DnsSdTxtRecord[size];
		}
		};
		}

services/core/java/com/android/server/NsdService.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -22,10 +22,10 @@ import android.content.Intent;
		import android.database.ContentObserver;
		import android.net.NetworkStack;
		import android.net.Uri;
		import android.net.nsd.DnsSdTxtRecord;
		import android.net.nsd.INsdManager;
		import android.net.nsd.NsdManager;
		import android.net.nsd.NsdServiceInfo;
		import android.net.util.nsd.DnsSdTxtRecord;
		import android.os.Handler;
		import android.os.HandlerThread;
		import android.os.Message;

wifi/java/android/net/wifi/p2p/nsd/WifiP2pDnsSdServiceInfo.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -17,7 +17,7 @@
		package android.net.wifi.p2p.nsd;

		import android.compat.annotation.UnsupportedAppUsage;
		import android.net.nsd.DnsSdTxtRecord;
		import android.net.util.nsd.DnsSdTxtRecord;
		import android.os.Build;
		import android.text.TextUtils;