internal List <DnsRecordBase> ProcessQuery(DnsQuestion question)
{
IPAddress ip = null;
if (state_.Config.Dns.CatchAll)
{
ip = CatchAllProcessQuery(question);
}
else
{
Interception interception = state_.Config.GetInterception(question.Name);
if (interception == null)
{
state_.Logger.Debug("No interception for '{0}' found", question.Name);
return(null);
}
ip = GetIp(interception);
}
if (null == ip)
{
state_.Logger.Information("No IP found for '{0}'", question.Name);
return(null);
}
List <DnsRecordBase> result = new List <DnsRecordBase>();
state_.Logger.Information("DNS {1} {0} TTL {2}", ip, question.Name, state_.Config.Dns.AnswerTtl);
result.Add(new ARecord(question.Name, state_.Config.Dns.AnswerTtl, ip));
return(result);
}
private IPAddress CatchAllProcessQuery(DnsQuestion question)
{
// If there is an interception configured, take it
Interception interception = state_.Config.GetInterception(question.Name);
if (interception != null)
{
return(GetIp(interception));
}
return(state_.AllocateIP(question.Name));
}
private IPAddress GetIp(Interception interception)
{
string configuredIp = GetConfiguredIp(interception);
if (String.IsNullOrWhiteSpace(configuredIp))
{
state_.Logger.Debug("No IP configured, take the default one: {0}", defaultIp_);
return(defaultIp_);
}
try
{
return(state_.AllocateIP(interception.Name, IPAddress.Parse(configuredIp)));
}
catch (FormatException)
{
state_.Logger.Error("{0} is not a valid IP address", configuredIp);
return(null);
}
}
protected override string GetConfiguredIp(Interception interception)
{
return(interception.IPv6);
}
protected abstract string GetConfiguredIp(Interception interception);
protected override string GetConfiguredIp(Interception interception)
{
return interception.IPv4;
}
private IPAddress GetIp(Interception interception)
{
string configuredIp = GetConfiguredIp(interception);
if(String.IsNullOrWhiteSpace(configuredIp))
{
state_.Logger.Debug("No IP configured, take the default one: {0}", defaultIp_);
return defaultIp_;
}
try
{
return state_.AllocateIP(interception.Name, IPAddress.Parse(configuredIp));
}
catch(FormatException)
{
state_.Logger.Error("{0} is not a valid IP address", configuredIp);
return null;
}
}
protected abstract string GetConfiguredIp(Interception interception);
