--- Gleb Smirnoff <[EMAIL PROTECTED]> wrote:
> On Thu, Feb 02, 2006 at 10:20:46PM -0800, kamal kc wrote: > k> i want to offload ip checksum calculation to the NIC. > k> I use 3Com 3c905B-TX NIC cards. > k> > k> I found that there are variables::>> > k> > k> int csum_flags; /* flags regarding checksum */ > k> int csum_data; /* data field used by csum routines */ > k> > k> in struct pkthdr in mbuf.h. > k> > k> also i found the various flags for the hardware checksumming. > k> but i don't know the exact steps i need to do > k> in order to offload checksumming. > k> > k> should i set the csum_flags to CSUM_IP and point > k> csum_data to the start of the ip header ?? > k> > k> it would be a great help if anybody > k> could tell me what do i need to do ? > > afaik, the xl(4) driver already supports checksum calculation. > > -- so what do i need to do if i don't want to calculate the ip checksum myself ? right now i am taking off packet from the kernel and modifying some of the data content, and outputting to the IFQ_HANDOFF myself. and i am calculating the checksum myself. i guess if xl would support the hardware checksumming i could use that feature. i am just a beginner and i am not getting the clear picture. thanks, kamal __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
