On 09/10/2014 07:24 PM, Joseph S. Myers wrote: > +#define UDP_NO_CHECK6_TX 101 /* Disable sending checksum for UDP6X. */ “UDP6X” appears to be a typo for “UDP6” in the kernel sources, but it should actually say “UDP over IPv6” in our version because that's more descriptive. -- Florian Weimer / Red Hat Product Security