am-wd/AMWD.Protocols.Modbus
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Fixing wrong range validations

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This commit is contained in:
Andreas Müller
2024-06-28 21:37:00 +02:00
parent 206c5420e1
commit 1536c60336
4 changed files with 29 additions and 17 deletions
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4
AMWD.Protocols.Modbus.Tcp/ModbusTcpConnection.cs
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@@ -34,8 +34,8 @@ namespace AMWD.Protocols.Modbus.Tcp
private readonly Task _processingTask;
private readonly AsyncQueue<RequestQueueItem> _requestQueue = new();
private TimeSpan _readTimeout = TimeSpan.FromMilliseconds(1);
private TimeSpan _writeTimeout = TimeSpan.FromMilliseconds(1);
private TimeSpan _readTimeout = TimeSpan.FromSeconds(1);
private TimeSpan _writeTimeout = TimeSpan.FromSeconds(1);
#endregion Fields

30
AMWD.Protocols.Modbus.Tcp/ModbusTcpServer.cs
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@@ -36,6 +36,8 @@ namespace AMWD.Protocols.Modbus.Tcp
private readonly ReaderWriterLockSlim _deviceListLock = new();
private readonly Dictionary<byte, ModbusDevice> _devices = [];
private TimeSpan _readWriteTimeout = TimeSpan.FromSeconds(1);
#endregion Fields
#region Constructors
@@ -49,7 +51,7 @@ namespace AMWD.Protocols.Modbus.Tcp
{
ListenAddress = listenAddress ?? IPAddress.Loopback;
if (ushort.MinValue < listenPort || listenPort < ushort.MaxValue)
if (listenPort < ushort.MinValue || ushort.MaxValue < listenPort)
throw new ArgumentOutOfRangeException(nameof(listenPort));
try
@@ -105,7 +107,17 @@ namespace AMWD.Protocols.Modbus.Tcp
/// <summary>
/// Gets or sets the read/write timeout.
/// </summary>
public TimeSpan ReadWriteTimeout { get; set; }
public TimeSpan ReadWriteTimeout
{
get => _readWriteTimeout;
set
{
if (value < TimeSpan.Zero)
throw new ArgumentOutOfRangeException(nameof(value));
_readWriteTimeout = value;
}
}
#endregion Properties
@@ -151,11 +163,11 @@ namespace AMWD.Protocols.Modbus.Tcp
private async Task StopAsyncInternal(CancellationToken cancellationToken = default)
{
_stopCts.Cancel();
_stopCts?.Cancel();
_listener.Stop();
_listener?.Stop();
#if NET8_0_OR_GREATER
_listener.Dispose();
_listener?.Dispose();
#endif
try
{
@@ -354,7 +366,7 @@ namespace AMWD.Protocols.Modbus.Tcp
ushort firstAddress = requestBytes.GetBigEndianUInt16(8);
ushort count = requestBytes.GetBigEndianUInt16(10);
if (TcpProtocol.MIN_READ_COUNT < count || count < TcpProtocol.MAX_DISCRETE_READ_COUNT)
if (count < TcpProtocol.MIN_READ_COUNT || TcpProtocol.MAX_DISCRETE_READ_COUNT < count)
{
responseBytes[7] |= 0x80;
responseBytes.Add((byte)ModbusErrorCode.IllegalDataValue);
@@ -406,7 +418,7 @@ namespace AMWD.Protocols.Modbus.Tcp
ushort firstAddress = requestBytes.GetBigEndianUInt16(8);
ushort count = requestBytes.GetBigEndianUInt16(10);
if (TcpProtocol.MIN_READ_COUNT < count || count < TcpProtocol.MAX_DISCRETE_READ_COUNT)
if (count < TcpProtocol.MIN_READ_COUNT || TcpProtocol.MAX_DISCRETE_READ_COUNT < count)
{
responseBytes[7] |= 0x80;
responseBytes.Add((byte)ModbusErrorCode.IllegalDataValue);
@@ -458,7 +470,7 @@ namespace AMWD.Protocols.Modbus.Tcp
ushort firstAddress = requestBytes.GetBigEndianUInt16(8);
ushort count = requestBytes.GetBigEndianUInt16(10);
if (TcpProtocol.MIN_READ_COUNT < count || count < TcpProtocol.MAX_REGISTER_READ_COUNT)
if (count < TcpProtocol.MIN_READ_COUNT || TcpProtocol.MAX_REGISTER_READ_COUNT < count)
{
responseBytes[7] |= 0x80;
responseBytes.Add((byte)ModbusErrorCode.IllegalDataValue);
@@ -507,7 +519,7 @@ namespace AMWD.Protocols.Modbus.Tcp
ushort firstAddress = requestBytes.GetBigEndianUInt16(8);
ushort count = requestBytes.GetBigEndianUInt16(10);
if (TcpProtocol.MIN_READ_COUNT < count || count < TcpProtocol.MAX_REGISTER_READ_COUNT)
if (count < TcpProtocol.MIN_READ_COUNT || TcpProtocol.MAX_REGISTER_READ_COUNT < count)
{
responseBytes[7] |= 0x80;
responseBytes.Add((byte)ModbusErrorCode.IllegalDataValue);