public override bool unregisterService(ServiceName serviceName)
{
DomainName dnsName = serviceName.toDnsName();
DomainName typeName = DomainName.Parse(serviceName.getType().toDnsString()) + registrationDomain;
List <DomainName> subtypes = new List <DomainName>(serviceName.getType().getSubtypes().Count);
foreach (String subtype in serviceName.getType().toDnsStringsWithSubtype())
{
subtypes.Add(DomainName.Parse(subtype) + registrationDomain);
}
DnsUpdateMessage msg = new DnsUpdateMessage();
msg.ZoneName = registrationDomain; // XXX Should really be the zone (SOA) for the RRs we are about to add
msg.Prequisites.Add(new RecordExistsPrequisite(dnsName, RecordType.Any));
msg.Updates.Add(new DeleteRecordUpdate(new PtrRecord(typeName, timeToLive, dnsName)));
foreach (DomainName subtype in subtypes)
{
msg.Updates.Add(new DeleteRecordUpdate(new PtrRecord(subtype, timeToLive, dnsName)));
}
msg.Updates.Add(new DeleteAllRecordsUpdate(dnsName));
TSigRecord tsigRecord = generateTSigRecord(msg.TransactionID);
if (tsigRecord != null)
{
msg.TSigOptions = tsigRecord;
}
DnsUpdateMessage response = resolver.SendUpdate(msg);
if (response != null)
{
switch (response.ReturnCode)
{
case ReturnCode.NoError:
//flushCache(update);
break;
case ReturnCode.YXDomain: // Prerequisite failed, the service already exists.
return(false);
default:
throw new DnsSDException("Failed to send DNS update to server. Server returned error code: " + response.ReturnCode.ToString());
}
}
else
{
throw new DnsSDException("Failed to send DNS update to server. Server time out");
}
// Remove the service type if there are no instances left
msg = new DnsUpdateMessage();
msg.ZoneName = registrationDomain; // XXX Should really be the zone (SOA) for the RRs we are about to add
msg.Prequisites.Add(new RecordNotExistsPrequisite(typeName, RecordType.Any));
msg.Updates.Add(new DeleteRecordUpdate(new PtrRecord(servicesName, timeToLive, typeName)));
tsigRecord = generateTSigRecord(msg.TransactionID);
if (tsigRecord != null)
{
msg.TSigOptions = tsigRecord;
}
response = resolver.SendUpdate(msg);
if (response != null)
{
switch (response.ReturnCode)
{
case ReturnCode.NoError:
//flushCache(update);
Log.Info(String.Format("Removed service type record {0}", typeName));
break;
case ReturnCode.YXDomain: // Prerequisite failed, service instances exists
Log.Info(String.Format("Did not remove service type record {0}, instances left.", typeName));
break;
default:
Log.Error(String.Format("Failed to remove service type {0}, server returned status {1}", typeName, response.ReturnCode.ToString()));
break;
}
}
else
{
throw new DnsSDException("Failed to send DNS update to server. Server time out");
}
return(true);
}
public override bool registerService(ServiceData serviceData)
{
ServiceName serviceName = serviceData.getName();
DomainName dnsName = serviceName.toDnsName();
DomainName typeName = DomainName.Parse(serviceName.getType().toDnsString()) + registrationDomain;
List <DomainName> subtypes = new List <DomainName>(serviceName.getType().getSubtypes().Count);
foreach (String subtype in serviceName.getType().toDnsStringsWithSubtype())
{
subtypes.Add(DomainName.Parse(subtype) + registrationDomain);
}
DomainName target = DomainName.Parse(serviceData.getHost());
List <String> strings = new List <String>();
foreach (var entry in serviceData.getProperties())
{
StringBuilder sb = new StringBuilder();
sb.Append(entry.Key);
if (entry.Key != null)
{
sb.Append('=').Append(entry.Value);
}
strings.Add(sb.ToString());
}
if (strings.Count <= 0)
{
// Must not be empty
strings.Add("");
}
DnsUpdateMessage msg = new DnsUpdateMessage();
msg.ZoneName = registrationDomain; // XXX Should really be the zone (SOA) for the RRs we are about to add
msg.Prequisites.Add(new RecordNotExistsPrequisite(dnsName, RecordType.Any));
msg.Updates.Add(new AddRecordUpdate(new PtrRecord(servicesName, timeToLive, typeName)));
msg.Updates.Add(new AddRecordUpdate(new PtrRecord(typeName, timeToLive, dnsName)));
foreach (DomainName subtype in subtypes)
{
msg.Updates.Add(new AddRecordUpdate(new PtrRecord(subtype, timeToLive, dnsName)));
}
msg.Updates.Add(new AddRecordUpdate(new SrvRecord(dnsName, timeToLive, 0, 0, Convert.ToUInt16(serviceData.getPort()), target)));
msg.Updates.Add(new AddRecordUpdate(new TxtRecord(dnsName, timeToLive, strings)));
TSigRecord tsigRecord = generateTSigRecord(msg.TransactionID);
if (tsigRecord != null)
{
msg.TSigOptions = tsigRecord;
}
DnsUpdateMessage response = resolver.SendUpdate(msg);
if (response != null)
{
switch (response.ReturnCode)
{
case ReturnCode.NoError:
//flushCache(update);
return(true);
case ReturnCode.YXDomain: // Prerequisite failed, the service already exists.
return(false);
default:
throw new DnsSDException("Failed to send DNS update to server. Server returned error code: " + response.ReturnCode.ToString());
}
}
else
{
throw new DnsSDException("Failed to send DNS update to server. Server time out");
}
}