tree 19aa4761b4381904203def58cf90abb6ae96cebe
parent e4f45b7f40bdaade5ef8f45e7c6daed4c909fdf5
author Tom Herbert <therbert@google.com> 1399073398 -0700
committer David S. Miller <davem@davemloft.net> 1399317990 -0400

net: Implmement RFC 6936 (zero RX csums for UDP/IPv6)

RFC 6936 relaxes the requirement of RFC 2460 that UDP/IPv6 packets which
are received with a zero UDP checksum value must be dropped. RFC 6936
allows zero checksums to support tunnels over UDP.

When sk_no_check is set we allow on a socket we allow a zero IPv6
UDP checksum. This is for both sending zero checksum and accepting
a zero checksum on receive.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>