public void Run(object state)
{
lock (Enclosing_Instance.IOLock)
{
if (Enclosing_Instance.PlannedAnswer == in_Renamed)
{
Enclosing_Instance.PlannedAnswer = null;
}
// We use these sets to prevent duplicate records
// FIXME - This should be moved into DNSOutgoing
// TODO: check these for compatibility
SupportClass.HashSetSupport questions = new SupportClass.HashSetSupport();
SupportClass.HashSetSupport answers = new SupportClass.HashSetSupport();
if (Enclosing_Instance.State == DNSState.ANNOUNCED)
{
try
{
long now = (DateTime.Now.Ticks - 621355968000000000) / 10000;
long expirationTime = now + 1; //=now+DNSConstants.KNOWN_ANSWER_TTL;
bool isUnicast = (port != DNSConstants.MDNS_PORT);
// Answer questions
foreach (DNSEntry entry in in_Renamed.questions)
{
if (entry is DNSQuestion)
{
DNSQuestion q = (DNSQuestion)entry;
// for unicast responses the question must be included
if (isUnicast)
{
//out.addQuestion(q);
questions.Add(q);
}
int type = q.type;
if (type == DNSConstants.TYPE_ANY || type == DNSConstants.TYPE_SRV)
{
// I ama not sure of why there is a special case here [PJYF Oct 15 2004]
if (Enclosing_Instance.localHost.Name.ToUpper().Equals(q.Name.ToUpper()))
{
// type = DNSConstants.TYPE_A;
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
type = DNSConstants.TYPE_IGNORE;
}
else if (Enclosing_Instance.serviceTypes.Contains(q.Name.ToLower()))
{
type = DNSConstants.TYPE_PTR;
}
}
switch (type)
{
case DNSConstants.TYPE_A:
{
// Answer a query for a domain name
//out = addAnswer( in, addr, port, out, host );
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
break;
}
case DNSConstants.TYPE_AAAA:
{
// Answer a query for a domain name
DNSRecord answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
break;
}
case DNSConstants.TYPE_PTR:
{
// Answer a query for services of a given type
// find matching services
foreach (ServiceInfo info in Enclosing_Instance.services.Values)
{
if (info.State == DNSState.ANNOUNCED)
{
if (q.name.ToUpper().Equals(info.type.ToUpper()))
{
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
answers.Add(new Pointer(info.type, DNSConstants.TYPE_PTR, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, info.QualifiedName));
answers.Add(new Service(info.QualifiedName, DNSConstants.TYPE_SRV, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.priority, info.weight, info.port, Enclosing_Instance.localHost.Name));
answers.Add(new Text(info.QualifiedName, DNSConstants.TYPE_TXT, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.text));
}
}
}
if (q.name.ToUpper().Equals("_services._mdns._udp.local.".ToUpper()))
{
foreach (String s in Enclosing_Instance.serviceTypes.Values)
{
answers.Add(new Pointer("_services._mdns._udp.local.", DNSConstants.TYPE_PTR, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, s));
}
}
break;
}
case DNSConstants.TYPE_SRV:
case DNSConstants.TYPE_ANY:
case DNSConstants.TYPE_TXT:
{
ServiceInfo info = (ServiceInfo)Enclosing_Instance.services[q.name.ToLower()];
if (info != null && info.State == DNSState.ANNOUNCED)
{
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
{
answers.Add(answer);
}
answers.Add(new Pointer(info.type, DNSConstants.TYPE_PTR, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, info.QualifiedName));
answers.Add(new Service(info.QualifiedName, DNSConstants.TYPE_SRV, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.priority, info.weight, info.port, Enclosing_Instance.localHost.Name));
answers.Add(new Text(info.QualifiedName, DNSConstants.TYPE_TXT, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.text));
}
break;
}
default:
{
//Console.WriteLine("JmDNSResponder.unhandled query:"+q);
break;
}
}
}
}
// remove known answers, if the ttl is at least half of
// the correct value. (See Draft Cheshire chapter 7.1.).
foreach (DNSRecord knownAnswer in in_Renamed.answers)
{
bool tempBoolean;
tempBoolean = answers.Contains(knownAnswer);
answers.Remove(knownAnswer);
if (knownAnswer.ttl > DNSConstants.DNS_TTL / 2 && tempBoolean)
{
logger.Debug("JmDNS Responder Known Answer Removed");
}
}
// responde if we have answers
if (answers.Count != 0)
{
logger.Debug("run() JmDNS responding");
DNSOutgoing out_Renamed = null;
if (isUnicast)
{
out_Renamed = new DNSOutgoing(DNSConstants.FLAGS_QR_RESPONSE | DNSConstants.FLAGS_AA, false);
}
foreach (DNSQuestion question in questions)
{
out_Renamed.AddQuestion(question);
}
foreach (DNSRecord answer in answers)
{
out_Renamed = Enclosing_Instance.AddAnswer(in_Renamed, addr, port, out_Renamed, answer);
}
Enclosing_Instance.Send(out_Renamed);
}
// TODO: do we need this?
//cancel();
}
catch (Exception e)
{
logger.Warn("run() exception ", e);
Enclosing_Instance.Close();
}
}
}
}
public void Run(object state)
{
lock (Enclosing_Instance.IOLock)
{
if (Enclosing_Instance.PlannedAnswer == in_Renamed)
{
Enclosing_Instance.PlannedAnswer = null;
}
// We use these sets to prevent duplicate records
// FIXME - This should be moved into DNSOutgoing
// TODO: check these for compatibility
SupportClass.HashSetSupport questions = new SupportClass.HashSetSupport();
SupportClass.HashSetSupport answers = new SupportClass.HashSetSupport();
if (Enclosing_Instance.State == DNSState.ANNOUNCED)
{
try
{
long now = (DateTime.Now.Ticks - 621355968000000000) / 10000;
long expirationTime = now + 1; //=now+DNSConstants.KNOWN_ANSWER_TTL;
bool isUnicast = (port != DNSConstants.MDNS_PORT);
// Answer questions
foreach (DNSEntry entry in in_Renamed.questions)
{
if (entry is DNSQuestion)
{
DNSQuestion q = (DNSQuestion) entry;
// for unicast responses the question must be included
if (isUnicast)
{
//out.addQuestion(q);
questions.Add(q);
}
int type = q.type;
if (type == DNSConstants.TYPE_ANY || type == DNSConstants.TYPE_SRV)
{
// I ama not sure of why there is a special case here [PJYF Oct 15 2004]
if (Enclosing_Instance.localHost.Name.ToUpper().Equals(q.Name.ToUpper()))
{
// type = DNSConstants.TYPE_A;
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
answers.Add(answer);
answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
answers.Add(answer);
type = DNSConstants.TYPE_IGNORE;
}
else if (Enclosing_Instance.serviceTypes.Contains(q.Name.ToLower()))
{
type = DNSConstants.TYPE_PTR;
}
}
switch (type)
{
case DNSConstants.TYPE_A:
{
// Answer a query for a domain name
//out = addAnswer( in, addr, port, out, host );
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
answers.Add(answer);
break;
}
case DNSConstants.TYPE_AAAA:
{
// Answer a query for a domain name
DNSRecord answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
answers.Add(answer);
break;
}
case DNSConstants.TYPE_PTR:
{
// Answer a query for services of a given type
// find matching services
foreach (ServiceInfo info in Enclosing_Instance.services.Values)
{
if (info.State == DNSState.ANNOUNCED)
{
if (q.name.ToUpper().Equals(info.type.ToUpper()))
{
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
answers.Add(answer);
answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
answers.Add(answer);
answers.Add(new Pointer(info.type, DNSConstants.TYPE_PTR, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, info.QualifiedName));
answers.Add(new Service(info.QualifiedName, DNSConstants.TYPE_SRV, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.priority, info.weight, info.port, Enclosing_Instance.localHost.Name));
answers.Add(new Text(info.QualifiedName, DNSConstants.TYPE_TXT, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.text));
}
}
}
if (q.name.ToUpper().Equals("_services._mdns._udp.local.".ToUpper()))
{
foreach (String s in Enclosing_Instance.serviceTypes.Values)
{
answers.Add(new Pointer("_services._mdns._udp.local.", DNSConstants.TYPE_PTR, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, s));
}
}
break;
}
case DNSConstants.TYPE_SRV:
case DNSConstants.TYPE_ANY:
case DNSConstants.TYPE_TXT:
{
ServiceInfo info = (ServiceInfo) Enclosing_Instance.services[q.name.ToLower()];
if (info != null && info.State == DNSState.ANNOUNCED)
{
DNSRecord answer = Enclosing_Instance.localHost.DNS4AddressRecord;
if (answer != null)
answers.Add(answer);
answer = Enclosing_Instance.localHost.DNS6AddressRecord;
if (answer != null)
answers.Add(answer);
answers.Add(new Pointer(info.type, DNSConstants.TYPE_PTR, DNSConstants.CLASS_IN, DNSConstants.DNS_TTL, info.QualifiedName));
answers.Add(new Service(info.QualifiedName, DNSConstants.TYPE_SRV, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.priority, info.weight, info.port, Enclosing_Instance.localHost.Name));
answers.Add(new Text(info.QualifiedName, DNSConstants.TYPE_TXT, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.text));
}
break;
}
default:
{
//Console.WriteLine("JmDNSResponder.unhandled query:"+q);
break;
}
}
}
}
// remove known answers, if the ttl is at least half of
// the correct value. (See Draft Cheshire chapter 7.1.).
foreach (DNSRecord knownAnswer in in_Renamed.answers)
{
bool tempBoolean;
tempBoolean = answers.Contains(knownAnswer);
answers.Remove(knownAnswer);
if (knownAnswer.ttl > DNSConstants.DNS_TTL / 2 && tempBoolean)
{
logger.Debug("JmDNS Responder Known Answer Removed");
}
}
// responde if we have answers
if (answers.Count != 0)
{
logger.Debug("run() JmDNS responding");
DNSOutgoing out_Renamed = null;
if (isUnicast)
{
out_Renamed = new DNSOutgoing(DNSConstants.FLAGS_QR_RESPONSE | DNSConstants.FLAGS_AA, false);
}
foreach (DNSQuestion question in questions)
{
out_Renamed.AddQuestion(question);
}
foreach (DNSRecord answer in answers)
{
out_Renamed = Enclosing_Instance.AddAnswer(in_Renamed, addr, port, out_Renamed, answer);
}
Enclosing_Instance.Send(out_Renamed);
}
// TODO: do we need this?
//cancel();
}
catch (Exception e)
{
logger.Warn("run() exception ", e);
Enclosing_Instance.Close();
}
}
}
}
