[dpdk-dev] zero copy of received segmented IP packet

2014-03-30 Thread Yossi Barshishat
) provides. Thanks Yossi -Original Message- From: David P. Reed [mailto:david.r...@tidalscale.com] Sent: Sunday, March 30, 2014 5:18 PM To: Yossi Barshishat Cc: dev at dpdk.org Subject: Re: [dpdk-dev] zero copy of received segmented IP packet Yossi - You may already understand this, but

[dpdk-dev] zero copy of received segmented IP packet

2014-03-30 Thread David P. Reed
Yossi - You may already understand this, but fragments of IP datagrams ("IP packet" is non-standard slang that confuses IP fragments - packets - with the end-to-end data unit of IP) need to be checksummed together with items from the ?virtual header? before delivery to TCP and then userspace.

[dpdk-dev] zero copy of received segmented IP packet

2014-03-30 Thread Yossi Barshishat
Hi, Assuming I know ahead that all IP segments related to one single IP packet ID arrive consequently and I need to forward the entire IP payload toward the application layer. One way to handle this is using a hash table for reassembly of the packet data (like the ipv4_reassembly example), anot