public PackageInfo ResolvePackage(byte[] data)
{
ushort flag = data.ReadUInt16(0);
if (flag != 0x5AA5)
{
return(null);
}
int offset = 2;
var len = data.ReadUInt16(offset);
offset += 2;
var cmdid = data.ReadUInt16(offset);
offset += 2;
var factory = RequestEntityFactoryManager.GetEntityFactoryByKey(cmdid);
if (factory == null)
{
return(new PackageInfo(cmdid, null));
}
byte check = data[4 + len + 1 - 1];
byte cresult = 0;
for (int i = 4; i < 4 + len; ++i)
{
cresult += data[i];
}
if (check != cresult)
{
return(new PackageInfo(cmdid, null));
}
IReceiveEntity entity = null;
try
{
var buffer = new byte[len - 1];
Buffer.BlockCopy(data, offset, buffer, 0, len - 1);
entity = factory.CreateRequestEntity(buffer);
}
catch (Exception e)
{
return(null);
}
PackageInfo package = new PackageInfo(cmdid, entity);
return(package);
}
public PackageInfo(ushort key, IReceiveEntity entity)
{
Key = key;
Entity = entity;
}
