// State machine
/// <summary> Sets the state and notifies all objects that wait on JmDNS.</summary>
internal virtual void AdvanceState()
{
lock (this)
{
state = state.Advance();
Monitor.PulseAll(this);
}
}
public void Run(object state)
{
DNSOutgoing out_Renamed = null;
try
{
// send probes for JmDNS itself
if (Enclosing_Instance.State == taskState)
{
if (out_Renamed == null)
{
out_Renamed = new DNSOutgoing(DNSConstants.FLAGS_QR_RESPONSE | DNSConstants.FLAGS_AA);
}
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
{
out_Renamed.AddAnswer(answer, 0);
}
answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
{
out_Renamed.AddAnswer(answer, 0);
}
Enclosing_Instance.AdvanceState();
}
// send announces for services
// Defensively copy the services into a local list,
// to prevent race conditions with methods registerService
// and unregisterService.
IList list;
lock (Enclosing_Instance)
{
list = new ArrayList(Enclosing_Instance.services.Values);
}
foreach (ServiceInfo info in list)
{
lock (info)
{
if (info.State == taskState && info.task == this)
{
info.AdvanceState();
logger.Debug("run() JmDNS announcing " + info.QualifiedName + " state " + info.State);
if (out_Renamed == null)
{
out_Renamed = new DNSOutgoing(DNSConstants.FLAGS_QR_RESPONSE | DNSConstants.FLAGS_AA);
}
out_Renamed.AddAnswer(new Pointer(info.type, DNSConstants.TYPE_PTR, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, info.QualifiedName), 0);
out_Renamed.AddAnswer(new Service(info.QualifiedName, DNSConstants.TYPE_SRV, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, info.priority, info.weight, info.port, Enclosing_Instance.localHost.Name), 0);
out_Renamed.AddAnswer(new Text(info.QualifiedName, DNSConstants.TYPE_TXT, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, info.text), 0);
}
}
}
if (out_Renamed != null)
{
logger.Debug("run() JmDNS announcing #" + taskState);
Enclosing_Instance.Send(out_Renamed);
}
else
{
// If we have nothing to send, another timer taskState ahead
// of us has done the job for us. We can cancel.
cancel();
}
}
catch (Exception e)
{
logger.Warn("run() exception ", e);
Enclosing_Instance.Recover();
}
taskState = taskState.Advance();
if (!taskState.Announcing)
{
cancel();
new Renewer(enclosingInstance).start();
}
}
