internal override async Task <bool> Stop(ulong timeout)
{
WSLOG("Stop");
_mustStop = true;
if (_reconnectionTimer != null)
{
_reconnectionTimer.Cancel();
}
foreach (Queue <WSRequest> queue in _workingRequests)
{
while (queue.Count > 0)
{
WSRequest wsRequest = queue.Peek();
await wsRequest.getResponseBytes();
if (queue.Contains(wsRequest))
{
queue.Dequeue();
}
}
}
_webSock.Close(1000, "");
//_outDataWriter = null;
WSLOG("Stop end");
return(false);
}
internal override async Task <byte[]> hubRequestSync(string req_first_line, byte[] req_head_and_body, uint mstimeout)
{
WSRequest wsRequest = await sendRequest(req_first_line, req_head_and_body, HUB_TCP_CHANNEL, false, null, null);
byte[] full_result = await wsRequest.getResponseBytes();
byte[] immVerifyHttPheader = imm_verifyHTTPheader(full_result);
return(immVerifyHttPheader);
}
internal override async Task <byte[]> devRequestSync(YDevice device, string req_first_line, byte[] req_head_and_body, uint mstimeout, YGenericHub.RequestProgress progress, object context)
{
if (mstimeout == 0)
{
// simulate a wait indefinitely
mstimeout = 86400000; //24h
}
WSRequest wsRequest = await sendRequest(req_first_line, req_head_and_body, DEVICE_TCP_CHANNEL, false, progress, context);
byte[] full_result = await wsRequest.getResponseBytes();
return(imm_verifyHTTPheader(full_result));
}
internal override async Task devRequestAsync(YDevice device, string req_first_line, byte[] req_head_and_body, YGenericHub.RequestAsyncResult asyncResult, object asyncContext)
{
WSRequest wsRequest = await sendRequest(req_first_line, req_head_and_body, DEVICE_TCP_CHANNEL, true, null, null);
}
/*
* look through all pending request if there is some data that we can send
*
*/
private async Task processRequests(WSRequest request)
{
int tcpchan = request.Channel;
int throttle_start = request.ReqPosition;
int throttle_end = request.ReqSize;
if (throttle_end > 2108 && _remoteVersion >= YGenericHub.USB_META_WS_PROTO_V2 && tcpchan == 0)
{
// Perform throttling on large uploads
if (request.ReqPosition == 0)
{
// First chunk is always first multiple of full window (124 bytes) above 2KB
throttle_end = 2108;
// Prepare to compute effective transfer rate
_lastUploadAckBytes[tcpchan] = 0;
_lastUploadAckTime[tcpchan] = 0;
// Start with initial RTT based estimate
_uploadRate = (int)(_tcpMaxWindowSize * 1000 / (int)_tcpRoundTripTime);
}
else if (_lastUploadAckTime[tcpchan] == 0)
{
// first block not yet acked, wait more
throttle_end = 0;
}
else
{
// adapt window frame to available bandwidth
long bytesOnTheAir = request.ReqPosition - _lastUploadAckBytes[tcpchan];
ulong timeOnTheAir = YAPI.GetTickCount() - _lastUploadAckTime[tcpchan];
int uploadRate = _uploadRate;
int toBeSent = (int)(2 * uploadRate + 1024 - bytesOnTheAir + (uploadRate * (int)timeOnTheAir / 1000));
if (toBeSent + bytesOnTheAir > DEFAULT_TCP_MAX_WINDOW_SIZE)
{
toBeSent = (int)(DEFAULT_TCP_MAX_WINDOW_SIZE - bytesOnTheAir);
}
WSLOG(string.Format("throttling: {0} bytes/s ({1} + {2} = {3})", _uploadRate, toBeSent, bytesOnTheAir, bytesOnTheAir + toBeSent));
if (toBeSent < 64)
{
ulong waitTime = (ulong)(1000 * (128 - toBeSent) / _uploadRate);
if (waitTime < 2)
{
waitTime = 2;
}
//_next_transmit_tm = YAPI.GetTickCount() + waitTime;
WSLOG(string.Format("WS: {0} sent {1}ms ago, waiting {2}ms...", bytesOnTheAir, timeOnTheAir, waitTime));
throttle_end = 0;
}
if (throttle_end > request.ReqPosition + toBeSent)
{
// when sending partial content, round up to full frames
if (toBeSent > 124)
{
toBeSent = (toBeSent / 124) * 124;
}
throttle_end = request.ReqPosition + toBeSent;
}
}
}
while (request.ReqPosition < throttle_end)
{
IBuffer data;
int datalen = throttle_end - request.ReqPosition;
if (datalen > MAX_DATA_LEN)
{
datalen = MAX_DATA_LEN;
}
if (request.imm_isAsync() && (request.ReqPosition + datalen == request.ReqSize))
{
if (datalen == MAX_DATA_LEN)
{
// last frame is already full we must send the async close in another one
data = request.imm_GetRequestData(request.ReqPosition, datalen);
await Send_WSStream(_webSock, YGenericHub.YSTREAM_TCP, tcpchan, data, 0);
//WSLOG(string.Format("ws_req:{0}: sent {1} bytes on chan{2} ({3}/{4})", request, datalen, tcpchan, request.ReqPosition, request.ReqSize));
request.imm_reportDataSent();
request.ReqPosition += datalen;
datalen = 0;
}
data = request.imm_GetRequestData(request.ReqPosition, datalen);
await Send_WSStream(_webSock, YGenericHub.YSTREAM_TCP_ASYNCCLOSE, tcpchan, data, request.AsyncId);
//WSLOG(string.Format("ws_req:{0}: sent async close {1}", request, request.AsyncId));
request.ReqPosition += datalen;
}
else
{
data = request.imm_GetRequestData(request.ReqPosition, datalen);
await Send_WSStream(_webSock, YGenericHub.YSTREAM_TCP, tcpchan, data, 0);
request.imm_reportDataSent();
//WSLOG(string.Format("ws_req:{0}: sent {1} bytes on chan{2} ({3}/{4})", request, datalen, tcpchan, request.ReqPosition, request.ReqSize));
request.ReqPosition += datalen;
}
}
if (request.ReqPosition < request.ReqSize)
{
int sent = request.ReqPosition - throttle_start;
// not completely sent, cannot do more for now
if (sent > 0 && _uploadRate > 0)
{
ulong waitTime = (ulong)(1000 * sent / _uploadRate);
if (waitTime < 2)
{
waitTime = 2;
}
//_next_transmit_tm = YAPI.GetTickCount() + waitTime;
WSLOG(string.Format("Sent {0}bytes, waiting {1}ms...", sent, waitTime));
}
else
{
//_next_transmit_tm = YAPI.GetTickCount() + 100;
}
}
}
private async Task <WSRequest> sendRequest(string req_first_line, byte[] req_head_and_body, int tcpchanel, bool async, YGenericHub.RequestProgress progress, Object context)
{
WSRequest request;
string debug = req_first_line.Trim();
byte[] full_request;
byte[] req_first_lineBytes;
if (req_head_and_body == null)
{
req_first_line += "\r\n\r\n";
req_first_lineBytes = YAPI.DefaultEncoding.GetBytes(req_first_line);
full_request = req_first_lineBytes;
}
else
{
req_first_line += "\r\n";
req_first_lineBytes = YAPI.DefaultEncoding.GetBytes(req_first_line);
full_request = new byte[req_first_lineBytes.Length + req_head_and_body.Length];
Array.Copy(req_first_lineBytes, 0, full_request, 0, req_first_lineBytes.Length);
Array.Copy(req_head_and_body, 0, full_request, req_first_lineBytes.Length, req_head_and_body.Length);
}
ulong timeout = YAPI.GetTickCount() + WS_REQUEST_MAX_DURATION;
while ((_connectionState != ConnectionState.CONNECTED && _connectionState != ConnectionState.DEAD))
{
if (timeout < YAPI.GetTickCount())
{
if (_connectionState != ConnectionState.CONNECTED && _connectionState != ConnectionState.CONNECTING)
{
throw new YAPI_Exception(YAPI.IO_ERROR, "IO error with hub");
}
else
{
throw new YAPI_Exception(YAPI.TIMEOUT, "Last request did not finished correctly");
}
}
if (_connectionState == ConnectionState.DEAD)
{
throw new YAPI_Exception(_session_errno, _session_error);
}
}
if (async)
{
request = new WSRequest(debug, tcpchanel, _nextAsyncId++, full_request);
if (_nextAsyncId >= 127)
{
_nextAsyncId = 48;
}
}
else
{
request = new WSRequest(debug, tcpchanel, full_request, progress, context);
}
_workingRequests[tcpchanel].Enqueue(request);
//todo: handle timeout
await processRequests(request);
if (request.ErrorCode != YAPI.SUCCESS)
{
throw new YAPI_Exception(request.ErrorCode, request.ErrorMsg);
}
return(request);
}
