public override Task MockSendAsync(CoapPacket packet, CancellationToken token)
{
var request = CoapMessage.CreateFromBytes(packet.Payload);
var block = request.Options.Get <Block1>() as BlockBase
?? request.Options.Get <Block2>();
var blockNumber = block != null
? block.BlockNumber
: 0;
var from = block != null
? (block.BlockNumber * block.BlockSize)
: 0;
var to = block != null
? Math.Min(from + block.BlockSize, TotalBytes)
: BlockSize;
CoapMessage response;
if (block is Block1)
{
if (block.BlockSize > BlockSize)
{
response = BaseResponse.Clone();
switch (Mode)
{
case MockBlockwiseEndpointMode.ReduceBlockSize:
response.Options.Add(new Options.Block1(0, BlockSize, true));
break;
case MockBlockwiseEndpointMode.RequestTooLarge:
response.Code = CoapMessageCode.RequestEntityTooLarge;
break;
default:
throw new NotImplementedException();
}
}
else
{
response = block.IsMoreFollowing
? BaseResponse.Clone()
: FinalResponse.Clone();
if (!block.IsMoreFollowing)
{
response.Options.Add(new Options.Block2(0, BlockSize, TotalBytes > BlockSize));
response.Payload = ByteRange(0, BlockSize);
}
response.Options.Add(new Options.Block1(block.BlockNumber, block.BlockSize, block.IsMoreFollowing));
response.Code = CoapMessageCode.Continue;
}
}
else //if (block is Block2)
{
if (block != null && block.BlockSize < BlockSize)
{
BlockSize = block.BlockSize;
to = from + BlockSize;
}
response = FinalResponse.Clone();
response.Options.Add(new Block2(blockNumber, BlockSize, to < TotalBytes));
response.Payload = ByteRange(from, to);
}
response.Id = request.Id;
response.Token = request.Token;
response.Type = CoapMessageType.Acknowledgement;
EnqueueReceivePacket(new CoapPacket {
Payload = response.ToBytes()
});
return(Task.CompletedTask);
}