On Mon, 2006-02-13 at 16:13 +0530, Krishna Pattabiraman wrote: > Hi all > I am reading a socket using SOCK_PACKET, the > driver strips off the checksum from the packet , > Is there any option can be passed to driver to > include the checksum and push it to packet User > Space ? > Usually each nic's driver handles with different way the ethernet checksums. Some cards add the checksum on hardware, so drivers don't add anything to the ethernet packet. On this case,if the hardware strips the checksum before forward the data to the driver,you cannot do anything. Other drivers add this checksum explicitly at the tail of ethernet frame (software checksuming), and of course on the receiving side strip it before forward it to the higher levels. On this case driver has the checksum itself,but normal drivers drop the frames with wrong checksum,so you must modify your driver to keep them. Stavros Passas -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
