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Fix usbmux to return any received data. #3134

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merged 2 commits into from
Jul 1, 2022
Merged

Fix usbmux to return any received data. #3134

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3fc33ba
Fix usbmux to return any received data.
rolfbjarne Jun 20, 2022
b2c2f87
Remove unnecessary string interpolation.
rolfbjarne Jun 21, 2022
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28 changes: 14 additions & 14 deletions src/Tools/dotnet-dsrouter/USBMuxTcpClientRouterFactory.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -118,12 +118,18 @@ public override Task FlushAsync(CancellationToken cancellationToken)

public override int Read(byte[] buffer, int offset, int count)
{
bool continueRead = true;
int bytesToRead = count;
int totalBytesRead = 0;
int currentBytesRead = 0;
int bytesRead = 0;

while (continueRead && bytesToRead - totalBytesRead > 0)
if (offset + count > buffer.Length)
throw new InvalidOperationException ($"Potential write beyond end of buffer");
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if (offset < 0)
throw new InvalidOperationException ($"Write before beginning of buffer");

if (count < 0)
throw new InvalidOperationException ($"Negative read count");

while (true)
{
if (!IsOpen)
throw new EndOfStreamException();
Expand All @@ -132,21 +138,15 @@ public override int Read(byte[] buffer, int offset, int count)
{
fixed (byte* fixedBuffer = buffer)
{
currentBytesRead = USBMuxInterop.recv(_handle, fixedBuffer + totalBytesRead, new IntPtr(bytesToRead - totalBytesRead), 0);
bytesRead = USBMuxInterop.recv(_handle, fixedBuffer + offset, new IntPtr (count), 0);
}
}

if (currentBytesRead == -1 && Marshal.GetLastWin32Error() == USBMuxInterop.EINTR)
if (bytesRead == -1 && Marshal.GetLastWin32Error() == USBMuxInterop.EINTR)
continue;

continueRead = currentBytesRead > 0;
if (!continueRead)
break;

totalBytesRead += currentBytesRead;
return bytesRead;
}

return totalBytesRead;
}

public override Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
Expand Down