public void FragmentWithTSNWrap()
{
SctpDataReceiver receiver = new SctpDataReceiver(0, 0, uint.MaxValue - 2);
SctpDataChunk chunk1 = new SctpDataChunk(false, true, false, uint.MaxValue - 2, 0, 0, 0, new byte[] { 0x00 });
SctpDataChunk chunk2 = new SctpDataChunk(false, false, false, uint.MaxValue - 1, 0, 0, 0, new byte[] { 0x01 });
SctpDataChunk chunk3 = new SctpDataChunk(false, false, false, uint.MaxValue, 0, 0, 0, new byte[] { 0x02 });
SctpDataChunk chunk4 = new SctpDataChunk(false, false, false, 0, 0, 0, 0, new byte[] { 0x03 });
SctpDataChunk chunk5 = new SctpDataChunk(false, false, true, 1, 0, 0, 0, new byte[] { 0x04 });
var sFrames1 = receiver.OnDataChunk(chunk1);
Assert.Equal(uint.MaxValue - 2, receiver.CumulativeAckTSN);
var sFrames2 = receiver.OnDataChunk(chunk2);
Assert.Equal(uint.MaxValue - 1, receiver.CumulativeAckTSN);
var sFrames3 = receiver.OnDataChunk(chunk3);
Assert.Equal(uint.MaxValue, receiver.CumulativeAckTSN);
var sFrames4 = receiver.OnDataChunk(chunk4);
Assert.Equal(0U, receiver.CumulativeAckTSN);
var sFrames5 = receiver.OnDataChunk(chunk5);
Assert.Equal(1U, receiver.CumulativeAckTSN);
Assert.Empty(sFrames1);
Assert.Empty(sFrames2);
Assert.Empty(sFrames3);
Assert.Empty(sFrames4);
Assert.Single(sFrames5);
Assert.Equal("0001020304", sFrames5.Single().UserData.HexStr());
Assert.Equal(0, receiver.ForwardTSNCount);
}
public void SinglePacketFrame()
{
SctpDataReceiver receiver = new SctpDataReceiver(0, 0, 0);
SctpDataChunk chunk = new SctpDataChunk(false, true, true, 0, 0, 0, 0, new byte[] { 0x00 });
var sortedFrames = receiver.OnDataChunk(chunk);
Assert.Single(sortedFrames);
Assert.Equal("00", sortedFrames.Single().UserData.HexStr());
Assert.Equal(0U, receiver.CumulativeAckTSN);
Assert.Equal(0, receiver.ForwardTSNCount);
}
public void FragmentWithTSNWrapAndOutOfOrder()
{
SctpDataReceiver receiver = new SctpDataReceiver(0, 0, uint.MaxValue - 2);
SctpDataChunk chunk1 = new SctpDataChunk(true, true, false, uint.MaxValue - 2, 0, 0, 0, new byte[] { 0x00 });
SctpDataChunk chunk2 = new SctpDataChunk(true, false, false, uint.MaxValue - 1, 0, 0, 0, new byte[] { 0x01 });
SctpDataChunk chunk3 = new SctpDataChunk(true, false, false, uint.MaxValue, 0, 0, 0, new byte[] { 0x02 });
SctpDataChunk chunk4 = new SctpDataChunk(true, false, false, 0, 0, 0, 0, new byte[] { 0x03 });
SctpDataChunk chunk5 = new SctpDataChunk(true, false, true, 1, 0, 0, 0, new byte[] { 0x04 });
// Intersperse a couple of full chunks in the middle of the fragmented chunk.
SctpDataChunk chunk6 = new SctpDataChunk(true, true, true, 6, 0, 0, 0, new byte[] { 0x06 });
SctpDataChunk chunk9 = new SctpDataChunk(true, true, true, 9, 0, 0, 0, new byte[] { 0x09 });
var sframes9 = receiver.OnDataChunk(chunk9);
Assert.Null(receiver.CumulativeAckTSN);
var sframes1 = receiver.OnDataChunk(chunk1);
Assert.Equal(uint.MaxValue - 2, receiver.CumulativeAckTSN);
var sframes2 = receiver.OnDataChunk(chunk2);
Assert.Equal(uint.MaxValue - 1, receiver.CumulativeAckTSN);
var sframes3 = receiver.OnDataChunk(chunk3);
Assert.Equal(uint.MaxValue, receiver.CumulativeAckTSN);
var sframes6 = receiver.OnDataChunk(chunk6);
Assert.Equal(uint.MaxValue, receiver.CumulativeAckTSN);
var sframes4 = receiver.OnDataChunk(chunk4);
Assert.Equal(0U, receiver.CumulativeAckTSN);
var sframes5 = receiver.OnDataChunk(chunk5);
Assert.Equal(1U, receiver.CumulativeAckTSN);
Assert.Empty(sframes1);
Assert.Empty(sframes2);
Assert.Empty(sframes3);
Assert.Empty(sframes4);
Assert.Single(sframes6);
Assert.Single(sframes9);
Assert.Single(sframes5);
Assert.Equal("0001020304", sframes5.Single().UserData.HexStr());
Assert.Equal(2, receiver.ForwardTSNCount);
}
public void CheckExpiryWithSinglePacketChunksUnordered()
{
uint tsn = uint.MaxValue - 3;
uint receiveWindow = 8;
uint mtu = 1;
SctpDataReceiver receiver = new SctpDataReceiver(receiveWindow, mtu, tsn);
for (int i = 0; i < 50; i++)
{
SctpDataChunk chunk = new SctpDataChunk(true, true, true, tsn++, 0, 0, 0, new byte[] { 0x55 });
var sortedFrames = receiver.OnDataChunk(chunk);
Assert.Single(sortedFrames);
Assert.Equal("55", sortedFrames.Single().UserData.HexStr());
Assert.Equal(0, receiver.ForwardTSNCount);
Assert.Equal(tsn - 1, receiver.CumulativeAckTSN);
}
}
public void ThreeStreamPackets()
{
SctpDataReceiver receiver = new SctpDataReceiver(0, 0, 0);
SctpDataChunk chunk1 = new SctpDataChunk(false, true, true, 0, 0, 0, 0, new byte[] { 0x00 });
SctpDataChunk chunk2 = new SctpDataChunk(false, true, true, 1, 0, 1, 0, new byte[] { 0x01 });
SctpDataChunk chunk3 = new SctpDataChunk(false, true, true, 2, 0, 2, 0, new byte[] { 0x02 });
var sortFrames1 = receiver.OnDataChunk(chunk1);
var sortFrames2 = receiver.OnDataChunk(chunk2);
var sortFrames3 = receiver.OnDataChunk(chunk3);
Assert.Single(sortFrames1);
Assert.Equal(0, sortFrames1.Single().StreamSeqNum);
Assert.Equal("00", sortFrames1.Single().UserData.HexStr());
Assert.Single(sortFrames2);
Assert.Equal(1, sortFrames2.Single().StreamSeqNum);
Assert.Equal("01", sortFrames2.Single().UserData.HexStr());
Assert.Single(sortFrames3);
Assert.Equal(2, sortFrames3.Single().StreamSeqNum);
Assert.Equal("02", sortFrames3.Single().UserData.HexStr());
Assert.Equal(0, receiver.ForwardTSNCount);
}
public void ThreeFragmentsOutOfOrder()
{
SctpDataReceiver receiver = new SctpDataReceiver(0, 0, 0);
SctpDataChunk chunk1 = new SctpDataChunk(false, true, false, 0, 0, 0, 0, new byte[] { 0x00 });
SctpDataChunk chunk2 = new SctpDataChunk(false, false, false, 1, 0, 0, 0, new byte[] { 0x01 });
SctpDataChunk chunk3 = new SctpDataChunk(false, false, true, 2, 0, 0, 0, new byte[] { 0x02 });
var sortFrames1 = receiver.OnDataChunk(chunk1);
Assert.Equal(0U, receiver.CumulativeAckTSN);
var sortFrames2 = receiver.OnDataChunk(chunk3);
Assert.Equal(0U, receiver.CumulativeAckTSN);
var sortFrames3 = receiver.OnDataChunk(chunk2);
Assert.Equal(2U, receiver.CumulativeAckTSN);
Assert.Empty(sortFrames1);
Assert.Empty(sortFrames2);
Assert.Single(sortFrames3);
Assert.Equal("000102", sortFrames3.Single().UserData.HexStr());
Assert.Equal(0, receiver.ForwardTSNCount);
}
public void StreamPacketsReceviedOutOfOrder()
{
SctpDataReceiver receiver = new SctpDataReceiver(0, 0, uint.MaxValue);
SctpDataChunk chunk0 = new SctpDataChunk(false, true, true, uint.MaxValue, 0, ushort.MaxValue, 0, new byte[] { 0x00 });
SctpDataChunk chunk1 = new SctpDataChunk(false, true, true, 0, 0, 0, 0, new byte[] { 0x00 });
SctpDataChunk chunk2 = new SctpDataChunk(false, true, true, 1, 0, 1, 0, new byte[] { 0x01 });
SctpDataChunk chunk3 = new SctpDataChunk(false, true, true, 2, 0, 2, 0, new byte[] { 0x02 });
var sortFrames0 = receiver.OnDataChunk(chunk0);
var sortFrames1 = receiver.OnDataChunk(chunk3);
var sortFrames2 = receiver.OnDataChunk(chunk2);
var sortFrames3 = receiver.OnDataChunk(chunk1);
Assert.Single(sortFrames0);
Assert.Empty(sortFrames1);
Assert.Empty(sortFrames2);
Assert.Equal(3, sortFrames3.Count);
Assert.Equal(0, sortFrames3.First().StreamSeqNum);
Assert.Equal("00", sortFrames3.First().UserData.HexStr());
Assert.Equal(2, sortFrames3.Last().StreamSeqNum);
Assert.Equal("02", sortFrames3.Last().UserData.HexStr());
Assert.Equal(0, receiver.ForwardTSNCount);
}
