#1 already do this.

 

I thought there was a flag I could set in the TCP to stop this..

 

NULL could still create fragmentation, I will go with you last opinion. Specially that there is no way for me of controlling the performance of the end  PC..

 

Thanks

 

-----Original Message-----
From: netburner_group@yahoogroups.com [mailto:netburner_group@yahoogroups.com] On Behalf Of chris ruff

Sent: Thursday, April 02, 2009 2:41 PM
To: netburner_group@yahoogroups.com
Subject: RE: [netburner_group] TCP Fragmentation

Denis:

 

1. have you tried the trick of

 

writeall(fd,buf,len)

 

?

 

Have you tried punching a bunch of NULLs out after your packet to force the NB stack to assemble and send a packet

 

Who is responsible for the Windows end?  On the windows apps I write I have always had to take this very problem into consideration. Basically, everybody needs to be able to handle packet fragmentation.  IMO it is essentially a marginal hack to force some host to squeak complete packets to make other host algorithms happy

 

Chris

 

 

-----Original Message-----
From: netburner_group@yahoogroups.com [mailto:netburner_group@yahoogroups.com]On Behalf Of Rheault, Denis
Sent: Thursday, April 02, 2009 2:10 PM
To: netburner_group@yahoogroups.com
Subject: RE: [netburner_group] TCP Fragmentation

No, opposite.

 

The problem I have is that I sent fix length packet of 1224 bytes of payload. Sometime the receiving end TCP get's full and some fragmentation happen. since the receiving end (PC) is looking for a fix payload format in the ip frame it can't recognize the payload data. 

 

What I would like is a way to only send the same type of frame to the PC. For a unknown reason the Netburner can process faster then the PC. Other thing, I am not writing the PC application ..

 

Here is a TCP dump of what happen. 232 is the netburner. Goal is to keep all packet to 1224

 

 

Denis

 

-----Original Message-----
From: netburner_group@yahoogroups.com [mailto:netburner_group@yahoogroups.com] On Behalf Of chris ruff
Sent: Thursday, April 02, 2009 1:30 PM
To: netburner_group@yahoogroups.com
Subject: RE: [netburner_group] TCP Fragmentation

Google "Nagle" algorithm

 

I am assuming that you want the host computer to send complete packets to the NB module

 

Chris

 

 

 

-----Original Message-----
From: netburner_group@yahoogroups.com [mailto:netburner_group@yahoogroups.com]On Behalf Of Rheault, Denis
Sent: Thursday, April 02, 2009 12:20 PM
To: netburner_group@yahoogroups.com
Subject: [netburner_group] TCP Fragmentation

Hi,

Is there a way I can disable fragmentation in the TCP stack ?

Denis Rheault
Sr. Maintenance Engineering Associate
Telesat
514-528-2207
514-527-6429 fax
drheault@...

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