public Bytes ExtractHead(out uint startOffset, out uint length)
{
if (this.Empty)
{
startOffset = 0;
length = 0;
return(null);
}
TcpVectorNode candidate = this.listHead.next;
Bytes data = candidate.Unlink();
count--;
if (data != null)
{
size -= candidate.length;
}
else
{
DebugStub.WriteLine("Extracthead no data??\n");
DebugStub.Break();
VTable.Assert(false);
}
startOffset = candidate.startOffset;
length = candidate.length;
return(data);
}
public Bytes ExtractTail(out uint startOffset, out uint length)
{
if (this.Empty)
{
startOffset = 0;
length = 0;
return(null);
}
TcpVectorNode candidate = this.listTail.prev;
Bytes data = candidate.Unlink();
count--;
if (data != null)
{
size -= candidate.length;
}
startOffset = candidate.startOffset;
length = candidate.length;
return(data);
}
public bool ReleaseDataFromTxBuffer(uint bytes)
{
uint totalBytes = bytes;
if (this.Empty)
{
DebugStub.Print("Attempting to release {0} bytes on an empty list? size {1}\n",
DebugStub.ArgList(bytes, this.size));
DebugStub.Break();
return(false);
}
else if (bytes > this.size)
{
DebugStub.Print("Ack! attempting to release {0} bytes size {1} bytes\n", DebugStub.ArgList(bytes, this.size));
bytes = this.size;
}
if (bytes > this.currentTxTotalOffset)
{
DebugStub.Print("ack! trying to release more than total offset??\n");
DebugStub.Break();
}
TcpVectorNode candidate = this.listHead.next;
while (bytes != 0)
{
if (candidate.length <= bytes)
{
TcpVectorNode toFree = candidate;
candidate = candidate.next;
bytes = bytes - toFree.length;
this.size -= toFree.length;
if (this.currentTxBuff == toFree)
{
this.currentTxBuff = null;
this.currentTxBufferOffset = 0;
}
Bytes data = toFree.Unlink();
this.count--;
if (data != null)
{
//delete data;
}
}
else
{
candidate.TrimStart(bytes);
//this happens when some packets being retransmitted are
//acknowledged during retransmission.
if ((candidate == this.currentTxBuff) &&
(candidate.startOffset > this.currentTxBufferOffset))
{
DebugStub.WriteLine("startoffset was {0} now {1} current offset {2} totalBytes to Free {3}\n",
DebugStub.ArgList((candidate.startOffset - bytes), candidate.startOffset,
this.currentTxBufferOffset, totalBytes));
this.currentTxBufferOffset = candidate.startOffset;
}
this.size -= bytes;
bytes = 0;
}
}
if (this.Empty)
{
return(false);
}
return(true);
}