protected override IFreeformEntity ParseBufferInternal(IFreeformEntity parent, IFreeformEntity rootEntity, ref IFreeformEntity entity, byte[] buffer, int offset, int length)
{
if (length == 0)
{
return(null);
}
int sessionId = -1;
if (buffer != null)
{
if (length < 0)
{
length = buffer.Length;
}
bool hasSubTargets = this.HasSubTargets;
while (offset < length)
{
int id = buffer[offset];
int combinedId = id;
byte length2 = 0;
byte[] buffer2 = null;
if (rootEntity != null &&
rootEntity is IFreeformEntity_Msg)
{
combinedId = rootEntity.CreateCombinedId(id, false);
}
if (HasSubTargets)
{
length2 = buffer[++offset]; // we may get zero length buffer
if (length2 > 0)
{
buffer2 = new byte[length2];
Buffer.BlockCopy(buffer, ++offset, buffer2, 0, buffer2.Length);
}
else
{
offset += 1;
continue;
}
}
else
{
buffer2 = new byte[buffer.Length - 1];
Buffer.BlockCopy(buffer, ++offset, buffer2, 0, buffer2.Length);
}
if (buffer2 != null)
{
IFreeformEntity_MsgTgt target = null;
bool isSecured = false;
bool isResponseRequired = false;
bool isResponseRequired2 = false;
FFParserItem parserItem = this.GetParserItem(rootEntity, id);
int appId = id;
// not found, then try it with combined id
if (parserItem == null)
{
parserItem = this.GetParserItem(rootEntity, combinedId);
}
// found
if (parserItem != null)
{
// check if response required
id = id.GetRequestResponseId(out isResponseRequired);
// check if the packet is secured
appId = parserItem.AppId.GetRequestResponseId(out isResponseRequired2);
FFTgtParseBufferHandler action = parserItem[this.FlowInitiation].Action;
if (action != null)
{
target = action(parent as IFreeformEntity_MsgTgt, id, length2, buffer2);
}
else
{
IFFParser parser = parserItem.GetParser(this.FlowInitiation);
if (parser != null)
{
target = parser.ParseBuffer(rootEntity, appId, buffer2) as IFreeformEntity_MsgTgt;
}
}
}
// secured target
if (target is FFTgt_B2B_Encrypted)
{
rootEntity.EncryptedTarget = target;
isSecured = true;
}
entity = target;
if (target != null)
{
target.TargetID = appId;
target.TargetLength = length2;
target.EntityData = buffer2;
target.IsSecured = isSecured;
target.IsResponseRequired = isResponseRequired;
if (parent != null)
{
parent.Targets.Add(target);
}
if (target is IFreeformEntity_MsgTgt_Primary &&
rootEntity != null)
{
rootEntity.EntityPrimaryTarget = target;
}
}
}
if (hasSubTargets)
{
offset += length2;
}
else
{
break;
}
}
}
return(entity);
}