/**
* Create a Bonjour service information object.
*
* @param instanceName instance name.<br>
* e.g) "MyPrinter"
* @param serviceType service type.<br>
* e.g) "_ipp._tcp"
* @param txtMap TXT record with key/value pair in a map confirming to format defined at
* http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt
* @return Bonjour service information object
*/
public static WifiP2pDnsSdServiceInfo newInstance(
String instanceName, String serviceType, Map<String, String> txtMap) {
if (TextUtils.isEmpty(instanceName) || TextUtils.isEmpty(serviceType)) {
throw new IllegalArgumentException("instance name or service type cannot be empty");
}
DnsSdTxtRecord txtRecord = new DnsSdTxtRecord();
if (txtMap != null) {
for (String key : txtMap.keySet()) {
txtRecord.set(key, txtMap.get(key));
}
}
ArrayList<String> queries = new ArrayList<String>();
queries.add(createPtrServiceQuery(instanceName, serviceType));
queries.add(createTxtServiceQuery(instanceName, serviceType, txtRecord));
return new WifiP2pDnsSdServiceInfo(queries);
}
/**
* Create wpa_supplicant service query for TXT record.
*
* @param instanceName instance name.<br>
* e.g) "MyPrinter"
* @param serviceType service type.<br>
* e.g) "_ipp._tcp"
* @param txtRecord TXT record.<br>
* @return wpa_supplicant service query.
*/
private static String createTxtServiceQuery(
String instanceName, String serviceType, DnsSdTxtRecord txtRecord) {
StringBuffer sb = new StringBuffer();
sb.append("bonjour ");
sb.append(
createRequest((instanceName + "." + serviceType + ".local."), DNS_TYPE_TXT, VERSION_1));
sb.append(" ");
byte[] rawData = txtRecord.getRawData();
if (rawData.length == 0) {
sb.append("00");
} else {
sb.append(bin2HexStr(rawData));
}
return sb.toString();
}
