private NetStatus OnRequestTimeout(Dispatcher.CallbackArgs args)
{
DateTime now = ((TimeoutArgument !)args).now;
int i = 0;
while (i != pendingRequests.Count)
{
PendingRequest request = (PendingRequest !)pendingRequests[i];
if (request.expiry < now)
{
DebugPrint("Expiring request");
request.callback(request.address,
EthernetAddress.Zero,
request.cookie);
pendingRequests.RemoveAt(i);
continue;
}
i++;
}
if (pendingRequests.Count > 0)
{
DateTime nextPoll = now + PollPeriod;
Core.Instance().TheDispatcher.AddCallback(
new Dispatcher.Callback(OnRequestTimeout),
new TimeoutArgument(nextPoll),
(ulong)nextPoll.Ticks
);
}
return(NetStatus.Code.RT_OK);
}
internal NetStatus OnConnectTimeout(Dispatcher.CallbackArgs args)
{
// We failed to become established in time. Bail out.
TcpSessionEventsSource.EventLog.LogTimeout(
Uid,
currentState.StateEnum,
TcpTimeoutType.Connect);
Terminate(null, TcpError.Timeout);
return(NetStatus.Code.PROTOCOL_OK);
}
// make the arp table entries older...
// currently arg is null
public NetStatus OnAgingTimer(Dispatcher.CallbackArgs arg)
{
arpTable.AgeTable();
DateTime then = DateTime.UtcNow + ArpTable.AgePeriod;
Core.Instance().TheDispatcher.AddCallback(
new Dispatcher.Callback(OnAgingTimer), null, (ulong)then.Ticks
);
return(NetStatus.Code.RT_OK);
}
private NetStatus OnPersistTimeout(Dispatcher.CallbackArgs timeoutArg)
{
//
// NOTE: This is a hack. A proper TCP stack is supposed to
// transmit a packet consisting of just one byte when probing the
// remote host to see if it has reopened its receive window.
// However, we prepacketize data, so we don't have that option.
// Instead, we probe using full packets.
//
TcpSessionEventsSource.EventLog.LogTimeout(
Uid,
currentState.StateEnum,
TcpTimeoutType.Persist);
TcpSegment seg = null;
if (retransmitQ.Count > 0)
{
// Use the oldest unacknowledged packet to probe
seg = (TcpSegment)retransmitQ[0];
}
else
{
// Nothing in the retransmit queue; probe using the next
// normal packet. This will transition the packet to the
// retransmission queue.
seg = GetNextPacket(true /*ignore window*/);
}
if (seg != null)
{
seg.Mux = BoundMux;
NetStatus err = Protocol.OnProtocolSend(seg);
assert err == NetStatus.Code.PROTOCOL_OK;
}
if (currentState != TCPFSM.CLOSED)
{
// rearm
StartPersistTimer();
}
return(NetStatus.Code.PROTOCOL_OK);
}
