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IEC62056PacketHandler.cs
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IEC62056PacketHandler.cs
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using System;
using System.Collections.Generic;
using System.Text;
using Gurux.Device;
using System.Windows.Forms;
using Gurux.Device.Editor;
using Gurux.Communication;
using Gurux.Common;
using Gurux.IEC62056_21.AddIn.Parser;
namespace Gurux.IEC62056_21.AddIn
{
class IEC62056PacketHandler : Gurux.Device.IGXPacketHandler
{
/// <summary>
/// Last status.
/// </summary>
int Status = 0;
/// <summary>
/// Date time of table.
/// </summary>
DateTime Time;
/// <summary>
/// Add time in minutes.
/// </summary>
int Add = 0;
string[] Columns;
public object Parent
{
get;
set;
}
/// <inheritdoc cref="IGXPacketHandler.Connect"/>
public void Connect(object sender)
{
}
/// <inheritdoc cref="IGXPacketHandler.Disconnect"/>
public void Disconnect(object sender)
{
}
public void ExecuteSendCommand(object sender, string command, GXPacket packet)
{
switch (command)
{
case "ReadTableData":
Status = 0;
Add = 0;
Columns = null;
GXIEC62056Table table = (GXIEC62056Table)sender;
table.ClearRows();
ReadTableData(sender, packet);
break;
case "ReadTableDataNext":
ReadTableDataNext(sender, packet);
break;
case "Connect":
GXIEC62056Device dev = GetDevice(sender);
Connect(dev.SerialNumber, dev.Password, dev.Mode, dev.GXClient.Media, dev.WaitTime);
break;
case "Disconnect":
Disconnect(GetDevice(sender), packet);
break;
case "Readout":
Readout(sender, packet);
break;
case "ReadData":
ReadData(sender, packet);
break;
case "KeepAlive":
KeepAlive(sender as GXIEC62056Device, packet);
break;
default:
throw new Exception("ExecuteCommand failed. Unknown command: " + command);
}
}
public void ExecuteParseCommand(object sender, string command, GXPacket[] packets)
{
switch (command)
{
case "ReadTableDataReply":
ReadTableDataReply(sender, packets);
break;
case "ReadDataReply":
ReadDataReply(sender, packets);
break;
case "DisconnectReply":
DisconnectReply(sender, packets);
break;
case "KeepAliveReply":
KeepAliveReply(sender as GXIEC62056Device, packets);
break;
default:
throw new Exception("ExecuteCommand failed. Unknown command: " + command);
}
}
public bool IsTransactionComplete(object sender, string command, GXPacket packet)
{
switch (command)
{
case "IsTableRead":
return IsTableRead(sender, packet);
default:
throw new Exception("IsTransactionComplete failed. Unknown command: " + command);
}
}
public object UIValueToDeviceValue(GXProperty sender, object value)
{
if (sender.ValueType == typeof(DateTime))
{
return Parser.IEC62056Parser.DateTimeToString((DateTime)value, true);
}
return value;
}
public object DeviceValueToUIValue(GXProperty sender, object value)
{
DataType dt = (sender as GXIEC62056Property).DataType;
if (!(value is DateTime))
{
if (dt == DataType.DateTime)
{
return Parser.IEC62056Parser.StringToDateTime(value.ToString());
}
else if (dt == DataType.Date)
{
return Parser.IEC62056Parser.StringToDateTime(value.ToString()).ToShortDateString();
}
else if (dt == DataType.Time)
{
return Parser.IEC62056Parser.StringToTime(value.ToString());
}
}
if (dt == DataType.OctetString)
{
value = ASCIIEncoding.ASCII.GetString(GXCommon.HexToBytes(value.ToString(), false));
}
return value;
}
private void KeepAlive(GXIEC62056Device device, GXPacket packet)
{
if (device.AliveMode == 0)
{
packet.AppendData("R2");
packet.AppendData((byte)2);
packet.AppendData("0.0.0()");
}
else
{
packet.AppendData("R" + device.AliveMode.ToString());
packet.AppendData((byte)2);
packet.AppendData(device.AliveData + "(" + device.AliveParameters + ")");
}
}
private void KeepAliveReply(GXIEC62056Device sender, GXPacket[] packets)
{
List<byte> fullData = new List<byte>();
foreach (GXPacket packet in packets)
{
object tmp = null;
tmp = packet.ExtractData(typeof(byte[]), 0, -1);
if (tmp is byte[])
{
fullData.AddRange(tmp as byte[]);
}
}
string val = ASCIIEncoding.ASCII.GetString(fullData.ToArray());
int start = val.IndexOf('(');
int end = val.LastIndexOf(')');
if (start != -1 && end != -1)
{
val = val.Substring(start + 1, end - start - 1);
}
}
private void ReadData(object sender, GXPacket packet)
{
if (!(sender is GXIEC62056Property))
{
return;
}
GXIEC62056Property prop = sender as GXIEC62056Property;
packet.AppendData("R" + prop.ReadMode.ToString());
packet.AppendData((byte)2);
packet.AppendData(prop.Data + "(" + prop.Parameters + ")");
}
private void ReadDataReply(object sender, GXPacket[] packets)
{
if (sender is GXIEC62056Property)
{
GXIEC62056Property prop = sender as GXIEC62056Property;
List<byte> fullData = new List<byte>();
foreach (GXPacket packet in packets)
{
object tmp = null;
tmp = packet.ExtractData(typeof(byte[]), 0, -1);
if (tmp is byte[])
{
fullData.AddRange(tmp as byte[]);
}
}
string val = ASCIIEncoding.ASCII.GetString(fullData.ToArray());
int start = val.IndexOf('(');
int end = val.LastIndexOf(')');
if (start != -1 && end != -1)
{
val = val.Substring(start + 1, end - start - 1);
}
prop.ReadTime = DateTime.Now;
prop.SetValue(val, false, PropertyStates.ValueChangedByDevice);
}
}
private void Readout(object sender, GXPacket packet)
{
GXDevice dev = null;
if (sender is GXDevice)
{
dev = sender as GXDevice;
}
else if (sender is GXTable)
{
dev = (sender as GXTable).Device;
}
else if (sender is GXCategory)
{
dev = (sender as GXCategory).Device;
}
else if (sender is GXProperty)
{
dev = (sender as GXProperty).Device;
}
else
{
throw new Exception("Readout failed. Unknown sender: " + sender.ToString());
}
/* TODO: Readout
List<byte> readoutBytes = Handshake(sender, packet, true);
List<Parser.IECDataObject> items = Parser.IEC62056Parser.ParseReadout(readoutBytes);
foreach (Parser.IECDataObject it in items)
{
if (!it.Address.Contains("*"))
{
List<object> results = new List<object>();
dev.FindByPropertyValue("OBISCode", it.Address, results);
if (results.Count > 0)
{
GXProperty prop = results[0] as GXProperty;
prop.ReadTime = DateTime.Now;
prop.SetValue(it.Value, false, PropertyStates.ValueChangedByDevice);
}
}
}
* */
}
private void ReadoutReply(object sender, GXPacket[] packets)
{
List<byte> fullData = new List<byte>();
foreach (GXPacket packet in packets)
{
object tmp = null;
tmp = packet.ExtractData(typeof(byte[]), 0, -1);
if (tmp is byte[])
{
fullData.AddRange(tmp as byte[]);
}
}
}
private void ReadTableDataNext(object sender, GXPacket packet)
{
packet.Bop = null;
packet.Eop = null;
packet.ChecksumSettings.Type = ChecksumType.None;
packet.AppendData((byte)0x06);
}
GXIEC62056Device GetDevice(object sender)
{
GXIEC62056Device dev = null;
if (sender is GXIEC62056Device)
{
dev = sender as GXIEC62056Device;
}
else if (sender is GXProperty)
{
dev = (sender as GXProperty).Device as GXIEC62056Device;
}
else
{
throw new Exception("InitRead failed. Unknown sender: " + sender.ToString());
}
return dev;
}
private void Disconnect(object sender, GXPacket packet)
{
GXIEC62056Device dev = null;
if (sender is GXIEC62056Device)
{
dev = sender as GXIEC62056Device;
}
else if (sender is GXProperty)
{
dev = (sender as GXProperty).Device as GXIEC62056Device;
}
else
{
throw new Exception("InitRead failed. Unknown sender: " + sender.ToString());
}
if (dev.Mode != Protocol.ModeA)
{
packet.ResendCount = -1;
packet.Eop = null;
packet.ChecksumSettings.Position = -3;
packet.ChecksumSettings.Count = -3;
packet.AppendData("B0");
packet.AppendData((byte) 3);
}
}
private void DisconnectReply(object sender, GXPacket[] packets)
{
string header, data;
List<byte> buff = new List<byte>(packets[0].ExtractPacket());
IEC62056Parser.GetPacket(buff, true, out header, out data);
}
private void Connect(string serialNumber, string password, Protocol protocol, IGXMedia media, int waittime)
{
string data = "/?" + serialNumber + "!\r\n";
byte[] reply = IEC62056Parser.Identify(media, data, '\0', waittime);
System.Diagnostics.Debug.WriteLine(ASCIIEncoding.ASCII.GetString(reply));
if (reply[0] != '/')
{
throw new Exception("Invalid reply.");
}
char baudRate = (char)reply[4];
string CModeBauds = "0123456789";
string BModeBauds = "ABCDEFGHI";
Protocol mode;
if (CModeBauds.IndexOf(baudRate) != -1)
{
mode = Protocol.ModeC;
}
else if (BModeBauds.IndexOf(baudRate) != -1)
{
mode = Protocol.ModeB;
}
else
{
mode = Protocol.ModeA;
baudRate = '0';
}
if (reply[0] != '/')
{
throw new Exception("Import failed. Invalid reply.");
}
string manufacturer = new string(new char[] { (char)reply[1], (char)reply[2], (char)reply[3] });
if (protocol == Protocol.ModeA)
{
data = (char)0x06 + "0" + baudRate + "0\r\n";
}
else
{
data = (char)0x06 + "0" + baudRate + "1\r\n";
}
//Note this sleep is in standard. Do not remove.
System.Threading.Thread.Sleep(300);
reply = IEC62056Parser.ParseHandshake(media, data, baudRate, waittime);
string header, frame;
IEC62056Parser.GetPacket(new List<byte>(reply), true, out header, out frame);
System.Diagnostics.Debug.WriteLine(frame);
if (header == "B0")
{
throw new Exception("Connection failed. Meter do not accept connection at the moment.");
}
//Password is asked and it is given.
if (header == "P0" && !string.IsNullOrEmpty(password))
{
System.Diagnostics.Debug.WriteLine("Password is asked.");
//If Elster A1700
if (manufacturer.Equals("GEC"))
{
password = ElsterEncrypt(password, frame);
}
data = (char)1 + "P2" + (char)2 + "(" + password + ")" + (char)3;
List<byte> tmp = new List<byte>(ASCIIEncoding.ASCII.GetBytes(data));
data = data + (char) IEC62056Parser.CalculateChecksum(tmp, 1, -1);
reply = IEC62056Parser.Read(media, data, baudRate, waittime, true);
if (reply == null || (reply.Length != 1 && reply[0] != 6))
{
throw new Exception("Connection failed. Invalid password.");
}
}
}
/// <summary>
/// Encrypt Elster PW for A1700.
/// </summary>
/// <param name="password"></param>
/// <param name="seed"></param>
/// <returns></returns>
string ElsterEncrypt(string password, string seed)
{
//Convert hex string to byte array.
byte[] s = GXCommon.HexToBytes(seed, false);
byte[] crypted = new byte[8];
for (int pos = 0; pos != 8; ++pos)
{
crypted[pos] = (byte)(password[pos] ^ s[pos]);
}
int last = crypted[7];
for (int pos = 0; pos != 8; ++pos)
{
long tmp = (crypted[pos] + last) & 0x800000FF;
crypted[pos] = (byte)((crypted[pos] + last) & 0xFF);
last = crypted[pos];
}
return GXCommon.ToHex(crypted, false);
}
private void ReadTableData(object sender, GXPacket packet)
{
GXIEC62056Table table = sender as GXIEC62056Table;
DateTime start, end;
(sender as IGXPartialRead).GetStartEndTime(out start, out end);
packet.AppendData(IEC62056Parser.GenerateReadTable(table.Data, start, end, table.Parameters, table.ReadMode, table.ReadCount));
}
private void ReadTableDataReply(object sender, GXPacket[] packets)
{
if ((sender as GXIEC62056Table).ReadMode != 6)
{
GXIEC62056Table table = (GXIEC62056Table)sender;
object[][] rows = Parser.IEC62056Parser.ParseTableData(packets[packets.Length - 1].ExtractPacket(), ref Columns, ref Status, ref Time, ref Add, table.Data);
table.AddRows(table.RowCount, new List<object[]>(rows), false);
}
}
private bool IsTableRead(object sender, GXPacket packet)
{
if ((sender as GXIEC62056Table).ReadMode == 6)
{
GXIEC62056Table table = (GXIEC62056Table)sender;
object[][] rows = Parser.IEC62056Parser.ParseTableData(packet.ExtractPacket(), ref Columns, ref Status, ref Time, ref Add, table.Data);
System.Diagnostics.Debug.WriteLine("Mikko " + rows.Length);
table.AddRows(table.RowCount, new List<object[]>(rows), false);
}
return (byte) packet.Eop != 0x4;
}
}
}