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Move GetDefaultTsapPair to TsapPair class

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This commit is contained in:
Michael Croes
2021-06-04 21:58:15 +02:00
parent fcd61c1236
commit 6465e3c8c7
2 changed files with 68 additions and 53 deletions
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53
S7.Net/Protocol/ConnectionRequest.cs
View File

@@ -6,7 +6,7 @@ namespace S7.Net.Protocol
{
public static byte[] GetCOTPConnectionRequest(CpuType cpu, Int16 rack, Int16 slot)
{
var tsapPair = GetDefaultTsapPair(cpu, rack, slot);
var tsapPair = TsapPair.GetDefaultTsapPair(cpu, rack, slot);
byte[] bSend1 = {
3, 0, 0, 22, //TPKT
@@ -28,56 +28,5 @@ namespace S7.Net.Protocol
return bSend1;
}
/// <summary>
/// Builds a <see cref="TsapPair" /> that can be used to connect to a PLC using the default connection
/// addresses.
/// </summary>
/// <remarks>
/// The remote TSAP is constructed using <code>new Tsap(0x03, (byte) ((rack &lt;&lt; 5) | slot))</code>.
/// </remarks>
/// <param name="cpuType">The CPU type of the PLC.</param>
/// <param name="rack">The rack of the PLC's network card.</param>
/// <param name="slot">The slot of the PLC's network card.</param>
/// <returns>A TSAP pair that matches the given parameters.</returns>
/// <exception cref="ArgumentOutOfRangeException">The <paramref name="cpuType"/> is invalid.
///
/// -or-
///
/// The <paramref name="rack"/> parameter is greater than 15.
///
/// -or-
///
/// The <paramref name="slot"/> parameter is greater than 15.</exception>
public static TsapPair GetDefaultTsapPair(CpuType cpuType, int rack, int slot)
{
if (rack > 0x0F) throw InvalidRackOrSlot(rack, nameof(rack));
if (slot > 0x0F) throw InvalidRackOrSlot(slot, nameof(slot));
switch (cpuType)
{
case CpuType.S7200:
return new TsapPair(new Tsap(0x10, 0x00), new Tsap(0x10, 0x00));
case CpuType.Logo0BA8:
// The actual values are probably on a per-project basis
return new TsapPair(new Tsap(0x01, 0x00), new Tsap(0x01, 0x02));
case CpuType.S7200Smart:
case CpuType.S71200:
case CpuType.S71500:
case CpuType.S7300:
case CpuType.S7400:
// Testing with S7 1500 shows only the remote TSAP needs to match. This might differ for other
// PLC types.
return new TsapPair(new Tsap(0x01, 0x00), new Tsap(0x03, (byte) ((rack << 5) | slot)));
default:
throw new ArgumentOutOfRangeException(nameof(cpuType), "Invalid CPU Type specified");
}
}
private static ArgumentOutOfRangeException InvalidRackOrSlot(int value, string name)
{
return new ArgumentOutOfRangeException(name,
$"Invalid {name} value specified (decimal: {value}, hexadecimal: {value:X}), maximum value is 15 (decimal) or 0x0F (hexadecimal).");
}
}
}

68
S7.Net/Protocol/TsapPair.cs
View File

@@ -1,4 +1,6 @@
namespace S7.Net.Protocol
using System;
namespace S7.Net.Protocol
{
/// <summary>
/// Implements a pair of TSAP addresses used to connect to a PLC.
@@ -26,5 +28,69 @@
Local = local;
Remote = remote;
}
/// <summary>
/// Builds a <see cref="TsapPair" /> that can be used to connect to a PLC using the default connection
/// addresses.
/// </summary>
/// <remarks>
/// The remote TSAP is constructed using <code>new Tsap(0x03, (byte) ((rack &lt;&lt; 5) | slot))</code>.
/// </remarks>
/// <param name="cpuType">The CPU type of the PLC.</param>
/// <param name="rack">The rack of the PLC's network card.</param>
/// <param name="slot">The slot of the PLC's network card.</param>
/// <returns>A TSAP pair that matches the given parameters.</returns>
/// <exception cref="ArgumentOutOfRangeException">The <paramref name="cpuType"/> is invalid.
///
/// -or-
///
/// The <paramref name="rack"/> parameter is less than 0.
///
/// -or-
///
/// The <paramref name="rack"/> parameter is greater than 15.
///
/// -or-
///
/// The <paramref name="slot"/> parameter is less than 0.
///
/// -or-
///
/// The <paramref name="slot"/> parameter is greater than 15.</exception>
public static TsapPair GetDefaultTsapPair(CpuType cpuType, int rack, int slot)
{
if (rack < 0) throw InvalidRackOrSlot(rack, nameof(rack), "minimum", 0);
if (rack > 0x0F) throw InvalidRackOrSlot(rack, nameof(rack), "maximum", 0x0F);
if (slot < 0) throw InvalidRackOrSlot(slot, nameof(slot), "minimum", 0);
if (slot > 0x0F) throw InvalidRackOrSlot(slot, nameof(slot), "maximum", 0x0F);
switch (cpuType)
{
case CpuType.S7200:
return new TsapPair(new Tsap(0x10, 0x00), new Tsap(0x10, 0x00));
case CpuType.Logo0BA8:
// The actual values are probably on a per-project basis
return new TsapPair(new Tsap(0x01, 0x00), new Tsap(0x01, 0x02));
case CpuType.S7200Smart:
case CpuType.S71200:
case CpuType.S71500:
case CpuType.S7300:
case CpuType.S7400:
// Testing with S7 1500 shows only the remote TSAP needs to match. This might differ for other
// PLC types.
return new TsapPair(new Tsap(0x01, 0x00), new Tsap(0x03, (byte) ((rack << 5) | slot)));
default:
throw new ArgumentOutOfRangeException(nameof(cpuType), "Invalid CPU Type specified");
}
}
private static ArgumentOutOfRangeException InvalidRackOrSlot(int value, string name, string extrema,
int extremaValue)
{
return new ArgumentOutOfRangeException(name,
$"Invalid {name} value specified (decimal: {value}, hexadecimal: {value:X}), {extrema} value " +
$"is {extremaValue} (decimal) or {extremaValue:X} (hexadecimal).");
}
}
}