public void dnsCallback(object result)
{
DnsTransaction.ResourceRecord rr = result as DnsTransaction.ResourceRecord;
IPAddress addr = new IPAddress(rr.data);
try
{
tor.proxy.CreateConnectionAsyncCompleted += new EventHandler <CreateConnectionAsyncCompletedEventArgs>(onConnect);
tor.proxy.CreateConnectionAsync(addr.ToString(), 43);
}
catch (SocketException e)
{
Debug.WriteLine(e.ToString());
}
}
public void cache(object obj)
{
uint source = 0; // source nameserver id?
if (obj is DnsTransaction)
{
DnsTransaction t = obj as DnsTransaction;
// cache question too? they're in the resource records....
// there should be a table that indicates the question (request made, the time, the flags, the response code, etc)
foreach (DnsTransaction.ResourceRecord rr in t.getRecords())
{
cache(rr);
}
}
if (obj is DnsTransaction.ResourceRecord)
{
DnsTransaction.ResourceRecord record = obj as DnsTransaction.ResourceRecord;
uint qid = getDnsQueryId(record.question);
MySqlCommand sql = new MySqlCommand("SELECT id FROM records WHERE query=@query AND ttl > (now()-cached) ORDER BY cached DESC LIMIT 1", db);
sql.Parameters.AddWithValue("@query", qid);
sql.Prepare();
object r = sql.ExecuteScalar();
if (r == null)
{
// Not in cache, or expired
sql.CommandText = "INSERT INTO records (query,ttl,data,source) VALUES (@query,@ttl,@data,@source)";
sql.Parameters.AddWithValue("@ttl", record.ttl);
sql.Parameters.AddWithValue("@data", record.data);
if (source != 0)
{
sql.Parameters.AddWithValue("@source", source);
}
else
{
sql.Parameters.AddWithValue("@source", null);
}
sql.ExecuteNonQuery();
}
}
}
