internal override bool HandleResponse(mDNS dns)
{
ServiceInfo info = (ServiceInfo)dns.services[name.ToLower()];
if (info != null && (port != info.port || !server.ToUpper().Equals(dns.LocalHost.Name.ToUpper())))
{
logger.Debug("handleResponse() Denial detected");
if (info.State.Probing)
{
string oldName = info.QualifiedName.ToLower();
info.SetName(dns.IncrementName(info.getName()));
dns.services.Remove(oldName);
dns.services[info.QualifiedName.ToLower()] = info;
logger.Debug("handleResponse() New unique name chose:" + info.getName());
}
info.RevertState();
return(true);
}
return(false);
}
/// <summary> Generate a possibly unique name for a service using the information we
/// have in the cache.
///
/// </summary>
/// <returns> returns true, if the name of the service info had to be changed.
/// </returns>
private bool makeServiceNameUnique(ServiceInfo info)
{
string originalQualifiedName = info.QualifiedName;
long now = (DateTime.Now.Ticks - 621355968000000000) / 10000;
bool collision;
do
{
collision = false;
// Check for collision in cache
for (DNSCache.CacheNode j = cache.find(info.QualifiedName.ToLower()); j != null; j = j.Next)
{
DNSRecord a = (DNSRecord)j.Value;
if ((a.type == DNSConstants.TYPE_SRV) && !a.IsExpired(now))
{
Service s = (Service)a;
if (s.port != info.port || !s.server.Equals(localHost.Name))
{
logger.Debug("makeServiceNameUnique() JmDNS.makeServiceNameUnique srv collision:" + a + " s.server=" + s.server + " " + localHost.Name + " equals:" + (s.server.Equals(localHost.Name)));
info.SetName(IncrementName(info.getName()));
collision = true;
break;
}
}
}
// Check for collision with other service infos published by JmDNS
object selfService = services[info.QualifiedName.ToLower()];
if (selfService != null && selfService != info)
{
info.SetName(IncrementName(info.getName()));
collision = true;
}
}while (collision);
return(!(originalQualifiedName.Equals(info.QualifiedName)));
}
internal virtual void HandleServiceResolved(ServiceInfo info)
{
IList list = (IList)serviceListeners[info.type.ToLower()];
if (list != null)
{
ServiceEvent event_Renamed = new ServiceEvent(this, info.type, info.getName(), info);
// Iterate on a copy in case listeners will modify it
ArrayList listCopy = new ArrayList(list);
foreach (IServiceListener listener in listCopy)
{
listener.ServiceResolved(this, event_Renamed);
}
}
}
internal override bool HandleQuery(mDNS dns, long expirationTime)
{
ServiceInfo info = (ServiceInfo)dns.services[name.ToLower()];
if (info != null && (port != info.port || !server.ToUpper().Equals(dns.LocalHost.Name.ToUpper())))
{
logger.Debug("handleQuery() Conflicting probe detected");
// Tie breaker test
if (info.State.Probing && lexCompare(new Service(info.QualifiedName, DNSConstants.TYPE_SRV, DNSConstants.CLASS_IN | DNSConstants.CLASS_UNIQUE, DNSConstants.DNS_TTL, info.priority, info.weight, info.port, dns.LocalHost.Name)) >= 0)
{
// We lost the tie break
string oldName = info.QualifiedName.ToLower();
info.SetName(dns.IncrementName(info.getName()));
dns.services.Remove(oldName);
dns.services[info.QualifiedName.ToLower()] = info;
logger.Debug("handleQuery() Lost tie break: new unique name chosen:" + info.getName());
}
info.RevertState();
return(true);
}
return(false);
}
/// <summary> Generate a possibly unique name for a service using the information we
/// have in the cache.
///
/// </summary>
/// <returns> returns true, if the name of the service info had to be changed.
/// </returns>
private bool makeServiceNameUnique(ServiceInfo info)
{
string originalQualifiedName = info.QualifiedName;
long now = (DateTime.Now.Ticks - 621355968000000000) / 10000;
bool collision;
do
{
collision = false;
// Check for collision in cache
for (DNSCache.CacheNode j = cache.find(info.QualifiedName.ToLower()); j != null; j = j.Next)
{
DNSRecord a = (DNSRecord) j.Value;
if ((a.type == DNSConstants.TYPE_SRV) && !a.IsExpired(now))
{
Service s = (Service) a;
if (s.port != info.port || !s.server.Equals(localHost.Name))
{
logger.Debug("makeServiceNameUnique() JmDNS.makeServiceNameUnique srv collision:" + a + " s.server=" + s.server + " " + localHost.Name + " equals:" + (s.server.Equals(localHost.Name)));
info.SetName(IncrementName(info.getName()));
collision = true;
break;
}
}
}
// Check for collision with other service infos published by JmDNS
object selfService = services[info.QualifiedName.ToLower()];
if (selfService != null && selfService != info)
{
info.SetName(IncrementName(info.getName()));
collision = true;
}
}
while (collision);
return !(originalQualifiedName.Equals(info.QualifiedName));
}
internal virtual void HandleServiceResolved(ServiceInfo info)
{
IList list = (IList) serviceListeners[info.type.ToLower()];
if (list != null)
{
ServiceEvent event_Renamed = new ServiceEvent(this, info.type, info.getName(), info);
// Iterate on a copy in case listeners will modify it
ArrayList listCopy = new ArrayList(list);
foreach (IServiceListener listener in listCopy)
{
listener.ServiceResolved(this, event_Renamed);
}
}
}
