121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff/* 221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Copyright (C) 2012 The Android Open Source Project 321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Licensed under the Apache License, Version 2.0 (the "License"); 521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * you may not use this file except in compliance with the License. 621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * You may obtain a copy of the License at 721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * http://www.apache.org/licenses/LICENSE-2.0 921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 1021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Unless required by applicable law or agreed to in writing, software 1121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * distributed under the License is distributed on an "AS IS" BASIS, 1221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * See the License for the specific language governing permissions and 1421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * limitations under the License. 1521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 1621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 1721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriffpackage android.net.wifi.p2p.nsd; 1821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 1921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriffimport android.net.nsd.DnsSdTxtRecord; 2021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriffimport android.text.TextUtils; 2121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 2221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriffimport java.util.ArrayList; 2321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriffimport java.util.HashMap; 2421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriffimport java.util.List; 25fea17de7aaa5729d3111102b2734b158403d2780Jeff Sharkeyimport java.util.Locale; 2621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriffimport java.util.Map; 2721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 2821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff/** 298bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * A class for storing Bonjour service information that is advertised 308bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * over a Wi-Fi peer-to-peer setup. 318bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * 328bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * {@see android.net.wifi.p2p.WifiP2pManager#addLocalService} 338bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * {@see android.net.wifi.p2p.WifiP2pManager#removeLocalService} 348bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * {@see WifiP2pServiceInfo} 358bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * {@see WifiP2pUpnpServiceInfo} 3621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 378bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriffpublic class WifiP2pDnsSdServiceInfo extends WifiP2pServiceInfo { 3821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 3921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 4021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Bonjour version 1. 4121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @hide 4221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 4321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff public static final int VERSION_1 = 0x01; 4421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 4521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 4621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Pointer record. 4721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @hide 4821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 4921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff public static final int DNS_TYPE_PTR = 12; 5021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 5121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 5221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Text record. 5321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @hide 5421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 5521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff public static final int DNS_TYPE_TXT = 16; 5621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 5721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 5821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * virtual memory packet. 5921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * see E.3 of the Wi-Fi Direct technical specification for the detail.<br> 6021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Key: domain name Value: pointer address.<br> 6121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 6221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff private final static Map<String, String> sVmPacket; 6321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 6421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff static { 6521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sVmPacket = new HashMap<String, String>(); 6621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sVmPacket.put("_tcp.local.", "c00c"); 6721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sVmPacket.put("local.", "c011"); 6821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sVmPacket.put("_udp.local.", "c01c"); 6921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 7021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 7121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 7221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * This constructor is only used in newInstance(). 7321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 7421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param queryList 7521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 768bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff private WifiP2pDnsSdServiceInfo(List<String> queryList) { 7721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff super(queryList); 7821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 7921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 8021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 818bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * Create a Bonjour service information object. 8221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 8321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param instanceName instance name.<br> 8421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * e.g) "MyPrinter" 858bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * @param serviceType service type.<br> 868bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * e.g) "_ipp._tcp" 87527ba07b637cedf206fec0d3b0cf92141700a23cIrfan Sheriff * @param txtMap TXT record with key/value pair in a map confirming to format defined at 888bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt 8921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @return Bonjour service information object 9021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 918bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff public static WifiP2pDnsSdServiceInfo newInstance(String instanceName, 92527ba07b637cedf206fec0d3b0cf92141700a23cIrfan Sheriff String serviceType, Map<String, String> txtMap) { 938bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff if (TextUtils.isEmpty(instanceName) || TextUtils.isEmpty(serviceType)) { 9421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff throw new IllegalArgumentException( 958bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff "instance name or service type cannot be empty"); 9621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 9721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 98527ba07b637cedf206fec0d3b0cf92141700a23cIrfan Sheriff DnsSdTxtRecord txtRecord = new DnsSdTxtRecord(); 99527ba07b637cedf206fec0d3b0cf92141700a23cIrfan Sheriff if (txtMap != null) { 100527ba07b637cedf206fec0d3b0cf92141700a23cIrfan Sheriff for (String key : txtMap.keySet()) { 101527ba07b637cedf206fec0d3b0cf92141700a23cIrfan Sheriff txtRecord.set(key, txtMap.get(key)); 102527ba07b637cedf206fec0d3b0cf92141700a23cIrfan Sheriff } 10321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 10421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 10521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff ArrayList<String> queries = new ArrayList<String>(); 1068bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff queries.add(createPtrServiceQuery(instanceName, serviceType)); 1078bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff queries.add(createTxtServiceQuery(instanceName, serviceType, txtRecord)); 10821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 1098bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff return new WifiP2pDnsSdServiceInfo(queries); 11021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 11121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 11221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 11321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Create wpa_supplicant service query for PTR record. 11421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 11521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param instanceName instance name.<br> 11621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * e.g) "MyPrinter" 1178bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * @param serviceType service type.<br> 1188bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * e.g) "_ipp._tcp" 11921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @return wpa_supplicant service query. 12021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 12121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff private static String createPtrServiceQuery(String instanceName, 1228bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff String serviceType) { 12321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 12421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff StringBuffer sb = new StringBuffer(); 12521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append("bonjour "); 1268bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff sb.append(createRequest(serviceType + ".local.", DNS_TYPE_PTR, VERSION_1)); 12721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(" "); 12821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 12921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff byte[] data = instanceName.getBytes(); 130fea17de7aaa5729d3111102b2734b158403d2780Jeff Sharkey sb.append(String.format(Locale.US, "%02x", data.length)); 13121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(WifiP2pServiceInfo.bin2HexStr(data)); 13221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff // This is the start point of this response. 13321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff // Therefore, it indicates the request domain name. 13421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append("c027"); 13521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff return sb.toString(); 13621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 13721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 13821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 13921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Create wpa_supplicant service query for TXT record. 14021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 14121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param instanceName instance name.<br> 14221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * e.g) "MyPrinter" 1438bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * @param serviceType service type.<br> 1448bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff * e.g) "_ipp._tcp" 14521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param txtRecord TXT record.<br> 14621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @return wpa_supplicant service query. 14721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 1488bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff private static String createTxtServiceQuery(String instanceName, 1498bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff String serviceType, 15021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff DnsSdTxtRecord txtRecord) { 15121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 15221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 15321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff StringBuffer sb = new StringBuffer(); 15421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append("bonjour "); 15521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 1568bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff sb.append(createRequest((instanceName + "." + serviceType + ".local."), 15721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff DNS_TYPE_TXT, VERSION_1)); 15821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(" "); 15921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff byte[] rawData = txtRecord.getRawData(); 16021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff if (rawData.length == 0) { 16121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append("00"); 16221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } else { 16321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(bin2HexStr(rawData)); 16421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 16521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff return sb.toString(); 16621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 16721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 16821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 16921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Create bonjour service discovery request. 17021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 17121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param dnsName dns name 17221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param dnsType dns type 17321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param version version number 17421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @hide 17521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 17621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff static String createRequest(String dnsName, int dnsType, int version) { 17721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff StringBuffer sb = new StringBuffer(); 17821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 17921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /* 18021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * The request format is as follows. 18121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * ________________________________________________ 18221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * | Encoded and Compressed dns name (variable) | 18321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * ________________________________________________ 18421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * | Type (2) | Version (1) | 18521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 1868bf825f48fde77cb2feb8720aac17093581bb085Irfan Sheriff if (dnsType == WifiP2pDnsSdServiceInfo.DNS_TYPE_TXT) { 187ee00b353a4070a9ddbdf67fa715dc84e7282f7c2Elliott Hughes dnsName = dnsName.toLowerCase(Locale.ROOT); // TODO: is this right? 18821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 18921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(compressDnsName(dnsName)); 190fea17de7aaa5729d3111102b2734b158403d2780Jeff Sharkey sb.append(String.format(Locale.US, "%04x", dnsType)); 191fea17de7aaa5729d3111102b2734b158403d2780Jeff Sharkey sb.append(String.format(Locale.US, "%02x", version)); 19221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 19321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff return sb.toString(); 19421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 19521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 19621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff /** 19721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * Compress DNS data. 19821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 19921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * see E.3 of the Wi-Fi Direct technical specification for the detail. 20021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * 20121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @param dnsName dns name 20221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff * @return compressed dns name 20321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff */ 20421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff private static String compressDnsName(String dnsName) { 20521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff StringBuffer sb = new StringBuffer(); 20621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 20721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff // The domain name is replaced with a pointer to a prior 20821ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff // occurrence of the same name in virtual memory packet. 20921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff while (true) { 21021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff String data = sVmPacket.get(dnsName); 21121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff if (data != null) { 21221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(data); 21321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff break; 21421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 21521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff int i = dnsName.indexOf('.'); 21621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff if (i == -1) { 21721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff if (dnsName.length() > 0) { 218fea17de7aaa5729d3111102b2734b158403d2780Jeff Sharkey sb.append(String.format(Locale.US, "%02x", dnsName.length())); 21921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(WifiP2pServiceInfo.bin2HexStr(dnsName.getBytes())); 22021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 22121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff // for a sequence of labels ending in a zero octet 22221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append("00"); 22321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff break; 22421ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 22521ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff 22621ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff String name = dnsName.substring(0, i); 22721ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff dnsName = dnsName.substring(i + 1); 228fea17de7aaa5729d3111102b2734b158403d2780Jeff Sharkey sb.append(String.format(Locale.US, "%02x", name.length())); 22921ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff sb.append(WifiP2pServiceInfo.bin2HexStr(name.getBytes())); 23021ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 23121ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff return sb.toString(); 23221ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff } 23321ba8153325e010224c6bc75a0acdc98b6ca82e8Irfan Sheriff} 234