On Sat 25 Jul 2009 22:02, Jerry Van Baren pondered:
Robin Getz wrote:
On Fri 24 Jul 2009 04:04, Alessandro Rubini pondered:
This patch add a quick and dirty defrag step in IP reception.
I needed to modify your patch a little bit to get it working on my platform.
If Ben/Wolfgang are interested in taking this - I'll fix up my mods, and send it back.
FWIIW, RFC815 describes a reassembly algorithm that handles out-of-order
reassembly directly in the receive buffer by keeping the "holes" bookkeeping data in the holes themselves. http://www.faqs.org/rfcs/rfc815.html
Yeah, I had seen this - but didn't want to duplicate something that Alessandro might already working on...
Alessandro - were you going to add out of order packets? Since we are only really interested in TFTP (which still requires an ACK for a complete block), we should not need to handle more than one packet ID, so it should be mostly trivial...
To make your host send out of order/delayed packets, which should be more "real world/long haul" try something like: # modprobe sch_netem (if it's not compiled into your kernel) # tc qdisc change dev eth0 root netem reorder 50% delay 10ms
-Robin