read from NetBuffer after using SendMessage

[aidin]

Awesome library!

I understand that the library is considered to "own" a NetBuffer after
passing it to SendMessage. But what if I only want to read from the
buffer or send it multiple times?

My application sometimes even have both cases (reading a buffer after
sending it x times) and I'm forced to copy the NetBuffer for every
SendMessage else my reading gets corrupted. I don't know if this is
due to the library overwriting the buffer (I've disabled buffer
recycling) or just reseting the read position.

It would be great if I could still read from the NetBuffer after using
SendMessage.

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[Aidin Abedi]

So my question is why can't I continue reading from a buffer passed to SendMessage?

[Aidin Abedi]

I've been digging around in NetServer.SendMessage but I can't find where it overwrites or changes the read position. I appears strange to me that this should even be the case since I don't see a reason for changing the buffer (when recyling is turned off) unless it has to do with fragmentation.

Lidgren please help me. why is my buffers getting corrupted after sending them to SendMessage?

Aidin

[Enriko Riba]

Hello,

After you issue a SendMessage the buffer is „owned“ by the lib band you are not supposed to use it anymore.

Honestly I don’t see where your problem is…in order to send a message (fill the NetBuffer) you must have the message content stored in a variable anyway, so instead trying to read from the buffer just read the variable.

 

HTH

Riki

 

Visit my projects at:

http://borgserver.sourceforge.net/index.html

http://txnagameengine.sourceforge.net

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[lidgren]

Hi!

Sorry for the slow reply. No, I don't see a reason your NetBuffer
should be corrupt or otherwise changed after being sent if recycling
is off. You can set the read position using the Position property (in
bits, not bytes!).

In gen3 this way of doing things aren't really supported tho.

--Michael

On May 17, 8:46 pm, Aidin Abedi <aidinab...@gmail.com> wrote:
> I've been digging around in NetServer.SendMessage but I can't find where it
> overwrites or changes the read position. I appears strange to me that this
> should even be the case since I don't see a reason for changing the buffer
> (when recyling is turned off) unless it has to do with fragmentation.
>
> Lidgren please help me. why is my buffers getting corrupted after sending
> them to SendMessage?
>
> Aidin
>
>
>
>
>
> On Mon, May 17, 2010 at 12:11 PM, Aidin Abedi <aidinab...@gmail.com> wrote:
> > So my question is why can't I continue reading from a buffer passed to
> > SendMessage?
>

[Aidin Abedi]

I solved it using this hacky solution:

NetBuffer dummy = new NetBuffer();

dummy.Data = buffer.Data;

dummy.LengthBits = buffer.LengthBits;

Where buffer is the original buffer and dummy points to it but has its own read position. Since this passes all my rigorous tests its obviously that only the read position gets modified by the library after SendMessage.

The reason why Im just not copying the data is simply because I don't see the need to. Why duplicate when you don't need to?