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Merge pull request #5520 from Bond-009/hdhomerun2

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Bond-009
2021-04-08 00:27:58 +02:00
committed by GitHub
parent 51a075a895 d9eb7ae6dc
commit 631df8c560
2 changed files with 319 additions and 48 deletions
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87
Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunManager.cs
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@@ -130,9 +130,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
int receivedBytes = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false);
ParseReturnMessage(buffer, receivedBytes, out string returnVal);
return string.Equals(returnVal, "none", StringComparison.OrdinalIgnoreCase);
return VerifyReturnValueOfGetSet(buffer.AsSpan(receivedBytes), "none");
}
finally
{
@@ -173,7 +171,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
int receivedBytes = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false);
// parse response to make sure it worked
if (!ParseReturnMessage(buffer, receivedBytes, out _))
if (!TryGetReturnValueOfGetSet(buffer.AsSpan(0, receivedBytes), out _))
{
continue;
}
@@ -185,7 +183,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
receivedBytes = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false);
// parse response to make sure it worked
if (!ParseReturnMessage(buffer, receivedBytes, out _))
if (!TryGetReturnValueOfGetSet(buffer.AsSpan(0, receivedBytes), out _))
{
await ReleaseLockkey(_tcpClient, lockKeyValue).ConfigureAwait(false);
continue;
@@ -199,7 +197,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
receivedBytes = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false);
// parse response to make sure it worked
if (!ParseReturnMessage(buffer, receivedBytes, out _))
if (!TryGetReturnValueOfGetSet(buffer.AsSpan(0, receivedBytes), out _))
{
await ReleaseLockkey(_tcpClient, lockKeyValue).ConfigureAwait(false);
continue;
@@ -239,7 +237,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
int receivedBytes = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false);
// parse response to make sure it worked
if (!ParseReturnMessage(buffer, receivedBytes, out _))
if (!TryGetReturnValueOfGetSet(buffer.AsSpan(0, receivedBytes), out _))
{
return;
}
@@ -292,7 +290,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
return FinishPacket(buffer, offset);
}
private static int WriteSetMessage(Span<byte> buffer, int tuner, string name, string value, uint? lockkey)
internal static int WriteSetMessage(Span<byte> buffer, int tuner, string name, string value, uint? lockkey)
{
var byteName = string.Format(CultureInfo.InvariantCulture, "/tuner{0}/{1}", tuner, name);
int offset = WriteHeaderAndPayload(buffer, byteName);
@@ -355,60 +353,65 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts.HdHomerun
return offset + 4;
}
private static bool ParseReturnMessage(byte[] buf, int numBytes, out string returnVal)
internal static bool VerifyReturnValueOfGetSet(ReadOnlySpan<byte> buffer, string expected)
{
returnVal = string.Empty;
return TryGetReturnValueOfGetSet(buffer, out var value)
&& string.Equals(Encoding.UTF8.GetString(value), expected, StringComparison.OrdinalIgnoreCase);
}
if (numBytes < 4)
internal static bool TryGetReturnValueOfGetSet(ReadOnlySpan<byte> buffer, out ReadOnlySpan<byte> value)
{
value = ReadOnlySpan<byte>.Empty;
if (buffer.Length < 8)
{
return false;
}
var flipEndian = BitConverter.IsLittleEndian;
int offset = 0;
byte[] msgTypeBytes = new byte[2];
Buffer.BlockCopy(buf, offset, msgTypeBytes, 0, msgTypeBytes.Length);
if (flipEndian)
{
Array.Reverse(msgTypeBytes);
}
var msgType = BitConverter.ToUInt16(msgTypeBytes, 0);
offset += 2;
if (msgType != GetSetReply)
uint crc = BinaryPrimitives.ReadUInt32LittleEndian(buffer[^4..]);
if (crc != Crc32.Compute(buffer[..^4]))
{
return false;
}
byte[] msgLengthBytes = new byte[2];
Buffer.BlockCopy(buf, offset, msgLengthBytes, 0, msgLengthBytes.Length);
if (flipEndian)
{
Array.Reverse(msgLengthBytes);
}
var msgLength = BitConverter.ToUInt16(msgLengthBytes, 0);
offset += 2;
if (numBytes < msgLength + 8)
if (BinaryPrimitives.ReadUInt16BigEndian(buffer) != GetSetReply)
{
return false;
}
offset++; // Name Tag
var msgLength = BinaryPrimitives.ReadUInt16BigEndian(buffer.Slice(2));
if (buffer.Length != 2 + 2 + 4 + msgLength)
{
return false;
}
var nameLength = buf[offset++];
var offset = 4;
if (buffer[offset++] != GetSetName)
{
return false;
}
var nameLength = buffer[offset++];
if (buffer.Length < 4 + 1 + offset + nameLength)
{
return false;
}
// skip the name field to get to value for return
offset += nameLength;
offset++; // Value Tag
if (buffer[offset++] != GetSetValue)
{
return false;
}
var valueLength = buf[offset++];
var valueLength = buffer[offset++];
if (buffer.Length < 4 + offset + valueLength)
{
return false;
}
returnVal = Encoding.UTF8.GetString(buf, offset, valueLength - 1); // remove null terminator
// remove null terminator
value = buffer.Slice(offset, valueLength - 1);
return true;
}
}