/// <summary>
/// Handles sending out fragments based on the messages in the queue.
/// </summary>
private void UpdateSend()
{
// Update existing active messages before doing anything else; if we
// send something for an existing active message then we don't go
// any further.
if (this.UpdateSendActiveMessages())
{
return;
}
// Re-evaluate the active messages to find and finalize any that
// have been full acknowledged.
this.CheckForFullAcknowledgement();
// If we get to here, then there were no active message that had
// sends pending, so rather than wasting a cycle doing nothing, we
// start sending out the next message by bringing a queued message
// into the active list.
// Make sure there are messages in the queue; if there aren't any
// then we have nothing left to do.
if (this.m_QueuedMessages.Count == 0)
{
return;
}
// Dequeue the next message.
var packet = this.m_QueuedMessages.Dequeue();
// Create the new send state that we're going to use to track this message.
var sendState = new MxReliabilitySendState();
// Assign the send state a unique send message ID and then increment our counter.
sendState.CurrentSendMessageID = this.m_CurrentSendMessageIDCounter++;
// Assign the send state the packet data.
sendState.CurrentSendMessage = packet;
// Fragment the packet up into (SafeFragmentSize - DataOffset) byte chunks.
var fragments = new List <Fragment>();
var total = 0;
for (var i = 0; i < packet.Length; i += SafeFragmentSize - DataOffset)
{
total += 1;
}
if (total >= byte.MaxValue)
{
throw new OverflowException(
"The input data was " + packet.Length
+ " bytes in length which is larger than the maximum " + ((SafeFragmentSize - DataOffset) * (byte.MaxValue - 1))
+ " bytes.");
}
var inc = 0;
for (var i = 0; i < packet.Length; i += SafeFragmentSize - DataOffset)
{
var length = Math.Min(SafeFragmentSize - DataOffset, packet.Length - i);
var fragment = new byte[length + DataOffset];
var messageIDBytes = BitConverter.GetBytes(sendState.CurrentSendMessageID);
var lengthBytes = BitConverter.GetBytes((UInt16)length);
fragment[0] = messageIDBytes[0];
fragment[1] = messageIDBytes[1];
fragment[2] = messageIDBytes[2];
fragment[3] = messageIDBytes[3];
fragment[4] = lengthBytes[0];
fragment[5] = lengthBytes[1];
fragment[6] = (byte)inc;
fragment[7] = (byte)total;
for (var idx = 0; idx < length; idx++)
{
fragment[idx + DataOffset] = packet[i + idx];
}
fragments.Add(new Fragment(fragment, FragmentStatus.WaitingOnSend));
inc++;
}
sendState.CurrentSendFragments = fragments;
// Add the new send state to the end of the list of active messages.
this.m_ActiveMessages.Add(sendState);
// Call UpdateSendActiveMessages again so that the new message gets queued
// this step.
this.UpdateSendActiveMessages();
// Fire the progress event which is now an aggregate of all messages
// that are waiting to be sent.
this.OnFragmentReceived(
new MxReliabilityTransmitEventArgs
{
Client = this.m_Client,
CurrentFragments = this.m_ActiveMessages.SelectMany(x => x.CurrentSendFragments).Count(x => x.Status == FragmentStatus.Acknowledged),
TotalFragments = this.m_ActiveMessages.SelectMany(x => x.CurrentSendFragments).Count(),
IsSending = true,
TotalSize = this.m_ActiveMessages.Sum(x => x.CurrentSendMessage.Length)
});
}
/// <summary>
/// Handles sending out fragments based on the messages in the queue.
/// </summary>
private void UpdateSend()
{
// Update existing active messages before doing anything else; if we
// send something for an existing active message then we don't go
// any further.
if (this.UpdateSendActiveMessages())
{
return;
}
// Re-evaluate the active messages to find and finalize any that
// have been full acknowledged.
this.CheckForFullAcknowledgement();
// If we get to here, then there were no active message that had
// sends pending, so rather than wasting a cycle doing nothing, we
// start sending out the next message by bringing a queued message
// into the active list.
// Make sure there are messages in the queue; if there aren't any
// then we have nothing left to do.
if (this.m_QueuedMessages.Count == 0)
{
return;
}
// Dequeue the next message.
var packet = this.m_QueuedMessages.Dequeue();
// Create the new send state that we're going to use to track this message.
var sendState = new MxReliabilitySendState();
// Assign the send state a unique send message ID and then increment our counter.
sendState.CurrentSendMessageID = this.m_CurrentSendMessageIDCounter++;
// Assign the send state the packet data.
sendState.CurrentSendMessage = packet;
// Fragment the packet up into (SafeFragmentSize - DataOffset) byte chunks.
var fragments = new List<Fragment>();
var total = 0;
for (var i = 0; i < packet.Length; i += SafeFragmentSize - DataOffset)
{
total += 1;
}
if (total >= byte.MaxValue)
{
throw new OverflowException(
"The input data was " + packet.Length
+ " bytes in length which is larger than the maximum " + ((SafeFragmentSize - DataOffset) * (byte.MaxValue - 1))
+ " bytes.");
}
var inc = 0;
for (var i = 0; i < packet.Length; i += SafeFragmentSize - DataOffset)
{
var length = Math.Min(SafeFragmentSize - DataOffset, packet.Length - i);
var fragment = new byte[length + DataOffset];
var messageIDBytes = BitConverter.GetBytes(sendState.CurrentSendMessageID);
var lengthBytes = BitConverter.GetBytes((UInt16)length);
fragment[0] = messageIDBytes[0];
fragment[1] = messageIDBytes[1];
fragment[2] = messageIDBytes[2];
fragment[3] = messageIDBytes[3];
fragment[4] = lengthBytes[0];
fragment[5] = lengthBytes[1];
fragment[6] = (byte)inc;
fragment[7] = (byte)total;
for (var idx = 0; idx < length; idx++)
{
fragment[idx + DataOffset] = packet[i + idx];
}
fragments.Add(new Fragment(fragment, FragmentStatus.WaitingOnSend));
inc++;
}
sendState.CurrentSendFragments = fragments;
// Add the new send state to the end of the list of active messages.
this.m_ActiveMessages.Add(sendState);
// Call UpdateSendActiveMessages again so that the new message gets queued
// this step.
this.UpdateSendActiveMessages();
// Fire the progress event which is now an aggregate of all messages
// that are waiting to be sent.
this.OnFragmentReceived(
new MxReliabilityTransmitEventArgs
{
Client = this.m_Client,
CurrentFragments = this.m_ActiveMessages.SelectMany(x => x.CurrentSendFragments).Count(x => x.Status == FragmentStatus.Acknowledged),
TotalFragments = this.m_ActiveMessages.SelectMany(x => x.CurrentSendFragments).Count(),
IsSending = true,
TotalSize = this.m_ActiveMessages.Sum(x => x.CurrentSendMessage.Length)
});
}
