private void UpdatePendingRequests(IPv4 ipAddress,
EthernetAddress macAddress)
{
using (pendingRequestsLock.Lock()) {
//Sigh...we're missing a linked list in the current Singularity C# runtime
foreach (PendingArpRequest pendingRequest in pendingRequests)
{
VTable.Assert(pendingRequest != null);
if (pendingRequest.address == ipAddress)
{
pendingRequest.active = false;
DebugStub.WriteLine("found waiting arp request...sending on out");
VectorQueueByte txBuffer = pendingRequest.txContainer.Acquire();
Bytes header = txBuffer.ExtractHead();
Bytes buffer = txBuffer.ExtractHead();
VTable.Assert(header != null);
VTable.Assert(buffer != null);
pendingRequest.txContainer.Release(txBuffer);
//Format ethernet header
EthernetHeader.Write(header, pendingRequest.localMac, macAddress, EthernetHeader.PROTOCOL_IP);
//send it!
VTable.Assert(pendingRequest.adapter != null);
pendingRequest.adapter.PopulateTxRing(header, buffer);
continue;
}
}
}
}
public Bytes PopAllPackets()
{
Bytes packet;
int sizeOfData;
Bytes buffer;
if (byteCount <= 0)
{
DebugStub.WriteLine("UDP PopAllPackets: no data???\n");
DebugStub.Break();
return(null);
}
using (thisLock.Lock()) {
DebugPrint("Popping {0} bytes of data to client\n", byteCount);
buffer = new Bytes(new byte[byteCount]);
VectorQueueByte incomingPacketQueue = packetContainer.Acquire();
int offset = 0;
while ((packet = incomingPacketQueue.ExtractHead()) != null)
{
VTable.Assert(packet != null);
Bitter.Copy(buffer, offset, packet.Length, packet, 0);
offset += packet.Length;
byteCount -= packet.Length;
//delete packet;
}
packetContainer.Release(incomingPacketQueue);
DebugStub.Assert(byteCount == 0);
}
return(buffer);
}
public void PushPacket(Bytes packet)
{
DebugPrint("Pushing packet\n");
using (thisLock.Lock()) {
byteCount += packet.Length;
VectorQueueByte incomingPacketQueue = packetContainer.Acquire();
incomingPacketQueue.AddTail(packet);
packetContainer.Release(incomingPacketQueue);
}
}
public Bytes PopSinglePacket()
{
Bytes packet = null;
using (thisLock.Lock()) {
VectorQueueByte incomingPacketQueue = packetContainer.Acquire();
packet = incomingPacketQueue.ExtractHead();
if (packet != null)
{
byteCount -= packet.Length;
}
packetContainer.Release(incomingPacketQueue);
}
return(packet);
}
public void Close()
{
//free any remaining messages in the queue
DebugPrint("Closing udp instance freeing port {0}\n", this.localPort);
bool rc = this.UpdatePort(0);
VTable.Assert(rc == true);
//cleanup any remaining data
Bytes packet;
VectorQueueByte incomingPacketQueue = packetContainer.Acquire();
while ((packet = incomingPacketQueue.ExtractHead()) != null)
{
//delete packet;
}
packetContainer.Release(incomingPacketQueue);
}
private AutoResetEvent AddPendingRequest(IPv4 address,
TimeSpan timeout,
EthernetAddress localMac,
Bytes header,
Bytes buffer,
IAdapter adapter
)
{
PendingArpRequest pendingRequest = (PendingArpRequest)pendingRequestsFreelist.Dequeue();
VTable.Assert(pendingRequest != null);
pendingRequest.address = address;
pendingRequest.active = true;
pendingRequest.localMac = localMac;
pendingRequest.adapter = adapter;
VectorQueueByte txBuffer = pendingRequest.txContainer.Acquire();
txBuffer.AddTail(header);
txBuffer.AddTail(buffer);
pendingRequest.txContainer.Release(txBuffer);
using (pendingRequestsLock.Lock()) {
pendingRequests.Enqueue(pendingRequest);
}
SchedulerTime expiration = SchedulerTime.Now;
expiration = expiration.Add(timeout);
pendingRequest.requestExpiration = expiration;
//poke the wait thread
if (pendingRequests.Count == 1)
{
arpHandle.Set();
}
return(pendingRequest.requestEvent);
}
public void Release(VectorQueueByte v)
{
o = v;
thisLock.Release();
}
public TContainerVectorQueueByte(VectorQueueByte o)
{
VTable.Assert(o != null);
this.o = o;
}
