public static byte[] decodePacket(byte[] data)
{
ENIP ip = new ENIP();
CIP_Reply_Read cip_read = new CIP_Reply_Read();
CIP_Reply_Write cip_write = new CIP_Reply_Write();
int offset = 0;
try {
ip.read(data, offset); offset += ip.size();
if (ip.cmd == ENIP.CMD_GET_SESSION)
{
return(new byte[0]);
}
switch (data[offset])
{
case (byte)0xcc:
cip_read.read(data, offset);
return(cip_read.tagdata);
case (byte)0xcd:
cip_write.read(data, offset);
return(new byte[0]);
}
return(null);
} catch (Exception e) {
Console.WriteLine(e.ToString());
return(null);
}
}
public static byte[] makeConnectPacket(ABContext context)
{
byte[] packet;
ENIP ip = new ENIP(ENIP.CMD_GET_SESSION);
ip.setSizes(0);
int size = ip.size();
packet = new byte[size];
int offset = 0;
try {
ip.write(packet, offset, context); offset += ip.size();
return(packet);
} catch (Exception e) {
Console.WriteLine(e.ToString());
return(null);
}
}
public static byte[] makeWritePacket(String tag, byte type, byte[] data, ABContext context)
{
byte[] packet;
ENIP ip = new ENIP(ENIP.CMD_RR_DATA);
CIP_Request cip = new CIP_Request();
cip.setWrite(tag, type, data);
ip.setSizes(cip.size());
int size = ip.size() + cip.size();
packet = new byte[size];
int offset = 0;
try {
ip.write(packet, offset, context); offset += ip.size();
cip.write(packet, offset);
return(packet);
} catch (Exception e) {
Console.WriteLine(e.ToString());
return(null);
}
}
