private StatusCode AskDnsServer(IPv4 dnsServer,
byte[] !outData,
out byte[] rcvData)
{
Core core = Core.Instance();
UdpModule udpModule = core.GetProtocolByName("UDP") as UdpModule;
if (udpModule == null)
{
rcvData = null;
return(StatusCode.TransportError);
}
UdpSession udpSession =
udpModule.CreateBoundSession(IPv4.Any, 0,
dnsServer, Dns.Format.ServerPort);
udpSession.WriteData(outData);
rcvData = udpSession.PollCopyData(TimeSpan.FromTicks(timeout.Ticks));
if (rcvData == null)
{
return(StatusCode.Timeout);
}
return(StatusCode.Success);
}
private void WorkerMain()
{
DebugPrint("Worker starting\n");
Random r = new Random();
transactionID = (uint)r.Next();
DateTime startTime = DateTime.Now;
// Enter "Init" state of FSM
ChangeState(new DhcpClientStateInitialize(this));
while (workerDone == false)
{
// Check for timeouts
DateTime now = DateTime.Now;
if (now >= renewalTimeout)
{
CancelRenewalTimeout();
@state.RenewalTimeoutEvent();
}
if (now >= rebindTimeout)
{
CancelRebindTimeout();
@state.RebindTimeoutEvent();
}
if (now >= stateTimeout)
{
CancelStateTimeout();
@state.StateTimeoutEvent();
}
// Poll for data
try {
byte [] data = udpSession.PollCopyData(PollInterval);
if (data != null)
{
SimpleBuffer sb = new SimpleBuffer(data);
DhcpFormat dhcp = DhcpFormat.Parse(sb);
// Check transaction id is ours
if (dhcp.TransactionID != transactionID)
{
continue;
}
// Check client address is ours
if (dhcp.GetHardwareAddress() != MacAddress)
{
continue;
}
@state.ReceiveEvent(dhcp);
}
}
catch (InvalidDhcpFormatException idfe) {
DebugPrint(idfe.Message);
}
// XXX Temporary until process can run in background
// from shell. ie we'd like to run and renew lease
// but shell blocks on running process and cleans up
// after it for the time being.
if (activeDhcpOptions != null)
{
DebugPrint("Got options -- done\n");
break;
}
if (DateTime.Now - startTime > TimeSpan.FromSeconds(5))
{
DebugPrint("Timed out\n");
break;
}
}
}